diff options
| author | Linus Torvalds | 2012-10-10 10:49:20 +0900 |
|---|---|---|
| committer | Linus Torvalds | 2012-10-10 10:49:20 +0900 |
| commit | 72055425e53540d9d0e59a57ac8c9b8ce77b62d5 (patch) | |
| tree | 8033d7d7bfdf8725eed785d02f7121d201052d2e /fs | |
| parent | fc81c038c2d61d4fcd8150f383fec1ce23087597 (diff) | |
| parent | f46dbe3dee853f8a860f889cb2b7ff4c624f2a7a (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs update from Chris Mason:
"This is a large pull, with the bulk of the updates coming from:
- Hole punching
- send/receive fixes
- fsync performance
- Disk format extension allowing more hardlinks inside a single
directory (btrfs-progs patch required to enable the compat bit for
this one)
I'm cooking more unrelated RAID code, but I wanted to make sure this
original batch makes it in. The largest updates here are relatively
old and have been in testing for some time."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (121 commits)
btrfs: init ref_index to zero in add_inode_ref
Btrfs: remove repeated eb->pages check in, disk-io.c/csum_dirty_buffer
Btrfs: fix page leakage
Btrfs: do not warn_on when we cannot alloc a page for an extent buffer
Btrfs: don't bug on enomem in readpage
Btrfs: cleanup pages properly when ENOMEM in compression
Btrfs: make filesystem read-only when submitting barrier fails
Btrfs: detect corrupted filesystem after write I/O errors
Btrfs: make compress and nodatacow mount options mutually exclusive
btrfs: fix message printing
Btrfs: don't bother committing delayed inode updates when fsyncing
btrfs: move inline function code to header file
Btrfs: remove unnecessary IS_ERR in bio_readpage_error()
btrfs: remove unused function btrfs_insert_some_items()
Btrfs: don't commit instead of overcommitting
Btrfs: confirmation of value is added before trace_btrfs_get_extent() is called
Btrfs: be smarter about dropping things from the tree log
Btrfs: don't lookup csums for prealloc extents
Btrfs: cache extent state when writing out dirty metadata pages
Btrfs: do not hold the file extent leaf locked when adding extent item
...
Diffstat (limited to 'fs')
38 files changed, 3564 insertions, 1615 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index ff6475f409d6..f3187938e081 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -16,6 +16,7 @@ * Boston, MA 021110-1307, USA. */ +#include <linux/vmalloc.h> #include "ctree.h" #include "disk-io.h" #include "backref.h" @@ -231,7 +232,7 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path, } if (!ret) { ret = ulist_add(parents, eb->start, - (unsigned long)eie, GFP_NOFS); + (uintptr_t)eie, GFP_NOFS); if (ret < 0) break; if (!extent_item_pos) { @@ -363,8 +364,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info, ULIST_ITER_INIT(&uiter); node = ulist_next(parents, &uiter); ref->parent = node ? node->val : 0; - ref->inode_list = - node ? (struct extent_inode_elem *)node->aux : 0; + ref->inode_list = node ? + (struct extent_inode_elem *)(uintptr_t)node->aux : 0; /* additional parents require new refs being added here */ while ((node = ulist_next(parents, &uiter))) { @@ -375,8 +376,8 @@ static int __resolve_indirect_refs(struct btrfs_fs_info *fs_info, } memcpy(new_ref, ref, sizeof(*ref)); new_ref->parent = node->val; - new_ref->inode_list = - (struct extent_inode_elem *)node->aux; + new_ref->inode_list = (struct extent_inode_elem *) + (uintptr_t)node->aux; list_add(&new_ref->list, &ref->list); } ulist_reinit(parents); @@ -914,8 +915,8 @@ again: free_extent_buffer(eb); } ret = ulist_add_merge(refs, ref->parent, - (unsigned long)ref->inode_list, - (unsigned long *)&eie, GFP_NOFS); + (uintptr_t)ref->inode_list, + (u64 *)&eie, GFP_NOFS); if (!ret && extent_item_pos) { /* * we've recorded that parent, so we must extend @@ -959,7 +960,7 @@ static void free_leaf_list(struct ulist *blocks) while ((node = ulist_next(blocks, &uiter))) { if (!node->aux) continue; - eie = (struct extent_inode_elem *)node->aux; + eie = (struct extent_inode_elem *)(uintptr_t)node->aux; for (; eie; eie = eie_next) { eie_next = eie->next; kfree(eie); @@ -1108,26 +1109,80 @@ static int inode_ref_info(u64 inum, u64 ioff, struct btrfs_root *fs_root, found_key); } -/* - * this iterates to turn a btrfs_inode_ref into a full filesystem path. elements - * of the path are separated by '/' and the path is guaranteed to be - * 0-terminated. the path is only given within the current file system. - * Therefore, it never starts with a '/'. the caller is responsible to provide - * "size" bytes in "dest". the dest buffer will be filled backwards. finally, - * the start point of the resulting string is returned. this pointer is within - * dest, normally. - * in case the path buffer would overflow, the pointer is decremented further - * as if output was written to the buffer, though no more output is actually - * generated. that way, the caller can determine how much space would be - * required for the path to fit into the buffer. in that case, the returned - * value will be smaller than dest. callers must check this! - */ -char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, - struct btrfs_inode_ref *iref, +int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid, + u64 start_off, struct btrfs_path *path, + struct btrfs_inode_extref **ret_extref, + u64 *found_off) +{ + int ret, slot; + struct btrfs_key key; + struct btrfs_key found_key; + struct btrfs_inode_extref *extref; + struct extent_buffer *leaf; + unsigned long ptr; + + key.objectid = inode_objectid; + btrfs_set_key_type(&key, BTRFS_INODE_EXTREF_KEY); + key.offset = start_off; + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret < 0) + return ret; + + while (1) { + leaf = path->nodes[0]; + slot = path->slots[0]; + if (slot >= btrfs_header_nritems(leaf)) { + /* + * If the item at offset is not found, + * btrfs_search_slot will point us to the slot + * where it should be inserted. In our case + * that will be the slot directly before the + * next INODE_REF_KEY_V2 item. In the case + * that we're pointing to the last slot in a + * leaf, we must move one leaf over. + */ + ret = btrfs_next_leaf(root, path); + if (ret) { + if (ret >= 1) + ret = -ENOENT; + break; + } + continue; + } + + btrfs_item_key_to_cpu(leaf, &found_key, slot); + + /* + * Check that we're still looking at an extended ref key for + * this particular objectid. If we have different + * objectid or type then there are no more to be found + * in the tree and we can exit. + */ + ret = -ENOENT; + if (found_key.objectid != inode_objectid) + break; + if (btrfs_key_type(&found_key) != BTRFS_INODE_EXTREF_KEY) + break; + + ret = 0; + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + extref = (struct btrfs_inode_extref *)ptr; + *ret_extref = extref; + if (found_off) + *found_off = found_key.offset; + break; + } + + return ret; +} + +static char *ref_to_path(struct btrfs_root *fs_root, + struct btrfs_path *path, + u32 name_len, unsigned long name_off, struct extent_buffer *eb_in, u64 parent, char *dest, u32 size) { - u32 len; int slot; u64 next_inum; int ret; @@ -1135,17 +1190,17 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, struct extent_buffer *eb = eb_in; struct btrfs_key found_key; int leave_spinning = path->leave_spinning; + struct btrfs_inode_ref *iref; if (bytes_left >= 0) dest[bytes_left] = '\0'; path->leave_spinning = 1; while (1) { - len = btrfs_inode_ref_name_len(eb, iref); - bytes_left -= len; + bytes_left -= name_len; if (bytes_left >= 0) read_extent_buffer(eb, dest + bytes_left, - (unsigned long)(iref + 1), len); + name_off, name_len); if (eb != eb_in) { btrfs_tree_read_unlock_blocking(eb); free_extent_buffer(eb); @@ -1155,6 +1210,7 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, ret = -ENOENT; if (ret) break; + next_inum = found_key.offset; /* regular exit ahead */ @@ -1170,8 +1226,11 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); } btrfs_release_path(path); - iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref); + + name_len = btrfs_inode_ref_name_len(eb, iref); + name_off = (unsigned long)(iref + 1); + parent = next_inum; --bytes_left; if (bytes_left >= 0) @@ -1188,12 +1247,39 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, } /* + * this iterates to turn a btrfs_inode_ref into a full filesystem path. elements + * of the path are separated by '/' and the path is guaranteed to be + * 0-terminated. the path is only given within the current file system. + * Therefore, it never starts with a '/'. the caller is responsible to provide + * "size" bytes in "dest". the dest buffer will be filled backwards. finally, + * the start point of the resulting string is returned. this pointer is within + * dest, normally. + * in case the path buffer would overflow, the pointer is decremented further + * as if output was written to the buffer, though no more output is actually + * generated. that way, the caller can determine how much space would be + * required for the path to fit into the buffer. in that case, the returned + * value will be smaller than dest. callers must check this! + */ +char *btrfs_iref_to_path(struct btrfs_root *fs_root, + struct btrfs_path *path, + struct btrfs_inode_ref *iref, + struct extent_buffer *eb_in, u64 parent, + char *dest, u32 size) +{ + return ref_to_path(fs_root, path, + btrfs_inode_ref_name_len(eb_in, iref), + (unsigned long)(iref + 1), + eb_in, parent, dest, size); +} + +/* * this makes the path point to (logical EXTENT_ITEM *) * returns BTRFS_EXTENT_FLAG_DATA for data, BTRFS_EXTENT_FLAG_TREE_BLOCK for * tree blocks and <0 on error. */ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, - struct btrfs_path *path, struct btrfs_key *found_key) + struct btrfs_path *path, struct btrfs_key *found_key, + u64 *flags_ret) { int ret; u64 flags; @@ -1237,10 +1323,17 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, (unsigned long long)found_key->objectid, (unsigned long long)found_key->offset, (unsigned long long)flags, item_size); - if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) - return BTRFS_EXTENT_FLAG_TREE_BLOCK; - if (flags & BTRFS_EXTENT_FLAG_DATA) - return BTRFS_EXTENT_FLAG_DATA; + + WARN_ON(!flags_ret); + if (flags_ret) { + if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) + *flags_ret = BTRFS_EXTENT_FLAG_TREE_BLOCK; + else if (flags & BTRFS_EXTENT_FLAG_DATA) + *flags_ret = BTRFS_EXTENT_FLAG_DATA; + else + BUG_ON(1); + return 0; + } return -EIO; } @@ -1404,12 +1497,13 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info, ULIST_ITER_INIT(&root_uiter); while (!ret && (root_node = ulist_next(roots, &root_uiter))) { pr_debug("root %llu references leaf %llu, data list " - "%#lx\n", root_node->val, ref_node->val, - ref_node->aux); - ret = iterate_leaf_refs( - (struct extent_inode_elem *)ref_node->aux, - root_node->val, extent_item_objectid, - iterate, ctx); + "%#llx\n", root_node->val, ref_node->val, + (long long)ref_node->aux); + ret = iterate_leaf_refs((struct extent_inode_elem *) + (uintptr_t)ref_node->aux, + root_node->val, + extent_item_objectid, + iterate, ctx); } ulist_free(roots); roots = NULL; @@ -1432,15 +1526,15 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, { int ret; u64 extent_item_pos; + u64 flags = 0; struct btrfs_key found_key; int search_commit_root = path->search_commit_root; - ret = extent_from_logical(fs_info, logical, path, - &found_key); + ret = extent_from_logical(fs_info, logical, path, &found_key, &flags); btrfs_release_path(path); if (ret < 0) return ret; - if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) + if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) return -EINVAL; extent_item_pos = logical - found_key.objectid; @@ -1451,9 +1545,12 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, return ret; } -static int iterate_irefs(u64 inum, struct btrfs_root *fs_root, - struct btrfs_path *path, - iterate_irefs_t *iterate, void *ctx) +typedef int (iterate_irefs_t)(u64 parent, u32 name_len, unsigned long name_off, + struct extent_buffer *eb, void *ctx); + +static int iterate_inode_refs(u64 inum, struct btrfs_root *fs_root, + struct btrfs_path *path, + iterate_irefs_t *iterate, void *ctx) { int ret = 0; int slot; @@ -1470,7 +1567,7 @@ static int iterate_irefs(u64 inum, struct btrfs_root *fs_root, while (!ret) { path->leave_spinning = 1; ret = inode_ref_info(inum, parent ? parent+1 : 0, fs_root, path, - &found_key); + &found_key); if (ret < 0) break; if (ret) { @@ -1498,7 +1595,8 @@ static int iterate_irefs(u64 inum, struct btrfs_root *fs_root, "tree %llu\n", cur, (unsigned long long)found_key.objectid, (unsigned long long)fs_root->objectid); - ret = iterate(parent, iref, eb, ctx); + ret = iterate(parent, name_len, + (unsigned long)(iref + 1), eb, ctx); if (ret) break; len = sizeof(*iref) + name_len; @@ -1513,12 +1611,98 @@ static int iterate_irefs(u64 inum, struct btrfs_root *fs_root, return ret; } +static int iterate_inode_extrefs(u64 inum, struct btrfs_root *fs_root, + struct btrfs_path *path, + iterate_irefs_t *iterate, void *ctx) +{ + int ret; + int slot; + u64 offset = 0; + u64 parent; + int found = 0; + struct extent_buffer *eb; + struct btrfs_inode_extref *extref; + struct extent_buffer *leaf; + u32 item_size; + u32 cur_offset; + unsigned long ptr; + + while (1) { + ret = btrfs_find_one_extref(fs_root, inum, offset, path, &extref, + &offset); + if (ret < 0) + break; + if (ret) { + ret = found ? 0 : -ENOENT; + break; + } + ++found; + + slot = path->slots[0]; + eb = path->nodes[0]; + /* make sure we can use eb after releasing the path */ + atomic_inc(&eb->refs); + + btrfs_tree_read_lock(eb); + btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); + btrfs_release_path(path); + + leaf = path->nodes[0]; + item_size = btrfs_item_size_nr(leaf, path->slots[0]); + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + cur_offset = 0; + + while (cur_offset < item_size) { + u32 name_len; + + extref = (struct btrfs_inode_extref *)(ptr + cur_offset); + parent = btrfs_inode_extref_parent(eb, extref); + name_len = btrfs_inode_extref_name_len(eb, extref); + ret = iterate(parent, name_len, + (unsigned long)&extref->name, eb, ctx); + if (ret) + break; + + cur_offset += btrfs_inode_extref_name_len(leaf, extref); + cur_offset += sizeof(*extref); + } + btrfs_tree_read_unlock_blocking(eb); + free_extent_buffer(eb); + + offset++; + } + + btrfs_release_path(path); + + return ret; +} + +static int iterate_irefs(u64 inum, struct btrfs_root *fs_root, + struct btrfs_path *path, iterate_irefs_t *iterate, + void *ctx) +{ + int ret; + int found_refs = 0; + + ret = iterate_inode_refs(inum, fs_root, path, iterate, ctx); + if (!ret) + ++found_refs; + else if (ret != -ENOENT) + return ret; + + ret = iterate_inode_extrefs(inum, fs_root, path, iterate, ctx); + if (ret == -ENOENT && found_refs) + return 0; + + return ret; +} + /* * returns 0 if the path could be dumped (probably truncated) * returns <0 in case of an error */ -static int inode_to_path(u64 inum, struct btrfs_inode_ref *iref, - struct extent_buffer *eb, void *ctx) +static int inode_to_path(u64 inum, u32 name_len, unsigned long name_off, + struct extent_buffer *eb, void *ctx) { struct inode_fs_paths *ipath = ctx; char *fspath; @@ -1531,20 +1715,17 @@ static int inode_to_path(u64 inum, struct btrfs_inode_ref *iref, ipath->fspath->bytes_left - s_ptr : 0; fspath_min = (char *)ipath->fspath->val + (i + 1) * s_ptr; - fspath = btrfs_iref_to_path(ipath->fs_root, ipath->btrfs_path, iref, eb, - inum, fspath_min, bytes_left); + fspath = ref_to_path(ipath->fs_root, ipath->btrfs_path, name_len, + name_off, eb, inum, fspath_min, + bytes_left); if (IS_ERR(fspath)) return PTR_ERR(fspath); if (fspath > fspath_min) { - pr_debug("path resolved: %s\n", fspath); ipath->fspath->val[i] = (u64)(unsigned long)fspath; ++ipath->fspath->elem_cnt; ipath->fspath->bytes_left = fspath - fspath_min; } else { - pr_debug("missed path, not enough space. missing bytes: %lu, " - "constructed so far: %s\n", - (unsigned long)(fspath_min - fspath), fspath_min); ++ipath->fspath->elem_missed; ipath->fspath->bytes_missing += fspath_min - fspath; ipath->fspath->bytes_left = 0; @@ -1566,7 +1747,7 @@ static int inode_to_path(u64 inum, struct btrfs_inode_ref *iref, int paths_from_inode(u64 inum, struct inode_fs_paths *ipath) { return iterate_irefs(inum, ipath->fs_root, ipath->btrfs_path, - inode_to_path, ipath); + inode_to_path, ipath); } struct btrfs_data_container *init_data_container(u32 total_bytes) @@ -1575,7 +1756,7 @@ struct btrfs_data_container *init_data_container(u32 total_bytes) size_t alloc_bytes; alloc_bytes = max_t(size_t, total_bytes, sizeof(*data)); - data = kmalloc(alloc_bytes, GFP_NOFS); + data = vmalloc(alloc_bytes); if (!data) return ERR_PTR(-ENOMEM); @@ -1626,6 +1807,6 @@ void free_ipath(struct inode_fs_paths *ipath) { if (!ipath) return; - kfree(ipath->fspath); + vfree(ipath->fspath); kfree(ipath); } diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h index 032f4dc7eab8..e75533043a5f 100644 --- a/fs/btrfs/backref.h +++ b/fs/btrfs/backref.h @@ -33,14 +33,13 @@ struct inode_fs_paths { typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root, void *ctx); -typedef int (iterate_irefs_t)(u64 parent, struct btrfs_inode_ref *iref, - struct extent_buffer *eb, void *ctx); int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root, struct btrfs_path *path); int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, - struct btrfs_path *path, struct btrfs_key *found_key); + struct btrfs_path *path, struct btrfs_key *found_key, + u64 *flags); int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, struct btrfs_extent_item *ei, u32 item_size, @@ -69,4 +68,9 @@ struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root, struct btrfs_path *path); void free_ipath(struct inode_fs_paths *ipath); +int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid, + u64 start_off, struct btrfs_path *path, + struct btrfs_inode_extref **ret_extref, + u64 *found_off); + #endif diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 5b2ad6bc4fe7..ed8ca7ca5eff 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -38,6 +38,7 @@ #define BTRFS_INODE_DELALLOC_META_RESERVED 4 #define BTRFS_INODE_HAS_ORPHAN_ITEM 5 #define BTRFS_INODE_HAS_ASYNC_EXTENT 6 +#define BTRFS_INODE_NEEDS_FULL_SYNC 7 /* in memory btrfs inode */ struct btrfs_inode { @@ -143,6 +144,9 @@ struct btrfs_inode { /* flags field from the on disk inode */ u32 flags; + /* a local copy of root's last_log_commit */ + unsigned long last_log_commit; + /* * Counters to keep track of the number of extent item's we may use due * to delalloc and such. outstanding_extents is the number of extent @@ -202,15 +206,10 @@ static inline bool btrfs_is_free_space_inode(struct inode *inode) static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) { - struct btrfs_root *root = BTRFS_I(inode)->root; - int ret = 0; - - mutex_lock(&root->log_mutex); if (BTRFS_I(inode)->logged_trans == generation && - BTRFS_I(inode)->last_sub_trans <= root->last_log_commit) - ret = 1; - mutex_unlock(&root->log_mutex); - return ret; + BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit) + return 1; + return 0; } #endif diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 9197e2e33407..5a3e45db642a 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -37,8 +37,9 @@ * the file system was mounted, (i.e., they have been * referenced by the super block) or they have been * written since then and the write completion callback - * was called and a FLUSH request to the device where - * these blocks are located was received and completed. + * was called and no write error was indicated and a + * FLUSH request to the device where these blocks are + * located was received and completed. * 2b. All referenced blocks need to have a generation * number which is equal to the parent's number. * @@ -2601,6 +2602,17 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state, (unsigned long long)l->block_ref_to->dev_bytenr, l->block_ref_to->mirror_num); ret = -1; + } else if (l->block_ref_to->iodone_w_error) { + printk(KERN_INFO "btrfs: attempt to write superblock" + " which references block %c @%llu (%s/%llu/%d)" + " which has write error!\n", + btrfsic_get_block_type(state, l->block_ref_to), + (unsigned long long) + l->block_ref_to->logical_bytenr, + l->block_ref_to->dev_state->name, + (unsigned long long)l->block_ref_to->dev_bytenr, + l->block_ref_to->mirror_num); + ret = -1; } else if (l->parent_generation != l->block_ref_to->generation && BTRFSIC_GENERATION_UNKNOWN != diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 43d1c5a3a030..c6467aa88bee 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -577,6 +577,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, u64 em_start; struct extent_map *em; int ret = -ENOMEM; + int faili = 0; u32 *sums; tree = &BTRFS_I(inode)->io_tree; @@ -626,9 +627,13 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, for (pg_index = 0; pg_index < nr_pages; pg_index++) { cb->compressed_pages[pg_index] = alloc_page(GFP_NOFS | __GFP_HIGHMEM); - if (!cb->compressed_pages[pg_index]) + if (!cb->compressed_pages[pg_index]) { + faili = pg_index - 1; + ret = -ENOMEM; goto fail2; + } } + faili = nr_pages - 1; cb->nr_pages = nr_pages; add_ra_bio_pages(inode, em_start + em_len, cb); @@ -713,8 +718,10 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, return 0; fail2: - for (pg_index = 0; pg_index < nr_pages; pg_index++) - free_page((unsigned long)cb->compressed_pages[pg_index]); + while (faili >= 0) { + __free_page(cb->compressed_pages[faili]); + faili--; + } kfree(cb->compressed_pages); fail1: diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 6d183f60d63a..b33436211000 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -4402,149 +4402,6 @@ void btrfs_extend_item(struct btrfs_trans_handle *trans, } /* - * Given a key and some data, insert items into the tree. - * This does all the path init required, making room in the tree if needed. - * Returns the number of keys that were inserted. - */ -int btrfs_insert_some_items(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_key *cpu_key, u32 *data_size, - int nr) -{ - struct extent_buffer *leaf; - struct btrfs_item *item; - int ret = 0; - int slot; - int i; - u32 nritems; - u32 total_data = 0; - u32 total_size = 0; - unsigned int data_end; - struct btrfs_disk_key disk_key; - struct btrfs_key found_key; - struct btrfs_map_token token; - - btrfs_init_map_token(&token); - - for (i = 0; i < nr; i++) { - if (total_size + data_size[i] + sizeof(struct btrfs_item) > - BTRFS_LEAF_DATA_SIZE(root)) { - break; - nr = i; - } - total_data += data_size[i]; - total_size += data_size[i] + sizeof(struct btrfs_item); - } - BUG_ON(nr == 0); - - ret = btrfs_search_slot(trans, root, cpu_key, path, total_size, 1); - if (ret == 0) - return -EEXIST; - if (ret < 0) - goto out; - - leaf = path->nodes[0]; - - nritems = btrfs_header_nritems(leaf); - data_end = leaf_data_end(root, leaf); - - if (btrfs_leaf_free_space(root, leaf) < total_size) { - for (i = nr; i >= 0; i--) { - total_data -= data_size[i]; - total_size -= data_size[i] + sizeof(struct btrfs_item); - if (total_size < btrfs_leaf_free_space(root, leaf)) - break; - } - nr = i; - } - - slot = path->slots[0]; - BUG_ON(slot < 0); - - if (slot != nritems) { - unsigned int old_data = btrfs_item_end_nr(leaf, slot); - - item = btrfs_item_nr(leaf, slot); - btrfs_item_key_to_cpu(leaf, &found_key, slot); - - /* figure out how many keys we can insert in here */ - total_data = data_size[0]; - for (i = 1; i < nr; i++) { - if (btrfs_comp_cpu_keys(&found_key, cpu_key + i) <= 0) - break; - total_data += data_size[i]; - } - nr = i; - - if (old_data < data_end) { - btrfs_print_leaf(root, leaf); - printk(KERN_CRIT "slot %d old_data %d data_end %d\n", - slot, old_data, data_end); - BUG_ON(1); - } - /* - * item0..itemN ... dataN.offset..dataN.size .. data0.size - */ - /* first correct the data pointers */ - for (i = slot; i < nritems; i++) { - u32 ioff; - - item = btrfs_item_nr(leaf, i); - ioff = btrfs_token_item_offset(leaf, item, &token); - btrfs_set_token_item_offset(leaf, item, - ioff - total_data, &token); - } - /* shift the items */ - memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr), - btrfs_item_nr_offset(slot), - (nritems - slot) * sizeof(struct btrfs_item)); - - /* shift the data */ - memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + - data_end - total_data, btrfs_leaf_data(leaf) + - data_end, old_data - data_end); - data_end = old_data; - } else { - /* - * this sucks but it has to be done, if we are inserting at - * the end of the leaf only insert 1 of the items, since we - * have no way of knowing whats on the next leaf and we'd have - * to drop our current locks to figure it out - */ - nr = 1; - } - - /* setup the item for the new data */ - for (i = 0; i < nr; i++) { - btrfs_cpu_key_to_disk(&disk_key, cpu_key + i); - btrfs_set_item_key(leaf, &disk_key, slot + i); - item = btrfs_item_nr(leaf, slot + i); - btrfs_set_token_item_offset(leaf, item, - data_end - data_size[i], &token); - data_end -= data_size[i]; - btrfs_set_token_item_size(leaf, item, data_size[i], &token); - } - btrfs_set_header_nritems(leaf, nritems + nr); - btrfs_mark_buffer_dirty(leaf); - - ret = 0; - if (slot == 0) { - btrfs_cpu_key_to_disk(&disk_key, cpu_key); - fixup_low_keys(trans, root, path, &disk_key, 1); - } - - if (btrfs_leaf_free_space(root, leaf) < 0) { - btrfs_print_leaf(root, leaf); - BUG(); - } -out: - if (!ret) - ret = nr; - return ret; -} - -/* * this is a helper for btrfs_insert_empty_items, the main goal here is * to save stack depth by doing the bulk of the work in a function * that doesn't call btrfs_search_slot @@ -5073,6 +4930,7 @@ static void tree_move_down(struct btrfs_root *root, struct btrfs_path *path, int *level, int root_level) { + BUG_ON(*level == 0); path->nodes[*level - 1] = read_node_slot(root, path->nodes[*level], path->slots[*level]); path->slots[*level - 1] = 0; @@ -5089,7 +4947,7 @@ static int tree_move_next_or_upnext(struct btrfs_root *root, path->slots[*level]++; - while (path->slots[*level] == nritems) { + while (path->slots[*level] >= nritems) { if (*level == root_level) return -1; @@ -5433,9 +5291,11 @@ int btrfs_compare_trees(struct btrfs_root *left_root, goto out; advance_right = ADVANCE; } else { + WARN_ON(!extent_buffer_uptodate(left_path->nodes[0])); ret = tree_compare_item(left_root, left_path, right_path, tmp_buf); if (ret) { + WARN_ON(!extent_buffer_uptodate(left_path->nodes[0])); ret = changed_cb(left_root, right_root, left_path, right_path, &left_key, diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 9821b672f5a2..926c9ffc66d9 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -154,6 +154,13 @@ struct btrfs_ordered_sum; */ #define BTRFS_NAME_LEN 255 +/* + * Theoretical limit is larger, but we keep this down to a sane + * value. That should limit greatly the possibility of collisions on + * inode ref items. + */ +#define BTRFS_LINK_MAX 65535U + /* 32 bytes in various csum fields */ #define BTRFS_CSUM_SIZE 32 @@ -489,6 +496,8 @@ struct btrfs_super_block { */ #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) +#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) + #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL #define BTRFS_FEATURE_INCOMPAT_SUPP \ @@ -496,7 +505,8 @@ struct btrfs_super_block { BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) + BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ + BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) /* * A leaf is full of items. offset and size tell us where to find @@ -643,6 +653,14 @@ struct btrfs_inode_ref { /* name goes here */ } __attribute__ ((__packed__)); +struct btrfs_inode_extref { + __le64 parent_objectid; + __le64 index; + __le16 name_len; + __u8 name[0]; + /* name goes here */ +} __attribute__ ((__packed__)); + struct btrfs_timespec { __le64 sec; __le32 nsec; @@ -1028,12 +1046,22 @@ struct btrfs_space_info { wait_queue_head_t wait; }; +#define BTRFS_BLOCK_RSV_GLOBAL 1 +#define BTRFS_BLOCK_RSV_DELALLOC 2 +#define BTRFS_BLOCK_RSV_TRANS 3 +#define BTRFS_BLOCK_RSV_CHUNK 4 +#define BTRFS_BLOCK_RSV_DELOPS 5 +#define BTRFS_BLOCK_RSV_EMPTY 6 +#define BTRFS_BLOCK_RSV_TEMP 7 + struct btrfs_block_rsv { u64 size; u64 reserved; struct btrfs_space_info *space_info; spinlock_t lock; - unsigned int full; + unsigned short full; + unsigned short type; + unsigned short failfast; }; /* @@ -1127,6 +1155,9 @@ struct btrfs_block_group_cache { * Today it will only have one thing on it, but that may change */ struct list_head cluster_list; + + /* For delayed block group creation */ + struct list_head new_bg_list; }; /* delayed seq elem */ @@ -1240,7 +1271,6 @@ struct btrfs_fs_info { struct mutex reloc_mutex; struct list_head trans_list; - struct list_head hashers; struct list_head dead_roots; struct list_head caching_block_groups; @@ -1366,9 +1396,6 @@ struct btrfs_fs_info { struct rb_root defrag_inodes; atomic_t defrag_running; - spinlock_t ref_cache_lock; - u64 total_ref_cache_size; - /* * these three are in extended format (availability of single * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other @@ -1441,6 +1468,8 @@ struct btrfs_fs_info { /* next backup root to be overwritten */ int backup_root_index; + + int num_tolerated_disk_barrier_failures; }; /* @@ -1481,9 +1510,9 @@ struct btrfs_root { wait_queue_head_t log_commit_wait[2]; atomic_t log_writers; atomic_t log_commit[2]; + atomic_t log_batch; unsigned long log_transid; unsigned long last_log_commit; - unsigned long log_batch; pid_t log_start_pid; bool log_multiple_pids; @@ -1592,6 +1621,7 @@ struct btrfs_ioctl_defrag_range_args { */ #define BTRFS_INODE_ITEM_KEY 1 #define BTRFS_INODE_REF_KEY 12 +#define BTRFS_INODE_EXTREF_KEY 13 #define BTRFS_XATTR_ITEM_KEY 24 #define BTRFS_ORPHAN_ITEM_KEY 48 /* reserve 2-15 close to the inode for later flexibility */ @@ -1978,6 +2008,13 @@ BTRFS_SETGET_STACK_FUNCS(block_group_flags, BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); +/* struct btrfs_inode_extref */ +BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, + parent_objectid, 64); +BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, + name_len, 16); +BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); + /* struct btrfs_inode_item */ BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); @@ -2858,6 +2895,8 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 size); int btrfs_remove_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 group_start); +void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, + struct btrfs_root *root); u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); void btrfs_clear_space_info_full(struct btrfs_fs_info *info); @@ -2874,8 +2913,9 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); -void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); -struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); +void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); +struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, + unsigned short type); void btrfs_free_block_rsv(struct btrfs_root *root, struct btrfs_block_rsv *rsv); int btrfs_block_rsv_add(struct btrfs_root *root, @@ -3172,12 +3212,12 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, u64 inode_objectid, u64 ref_objectid, u64 *index); -struct btrfs_inode_ref * -btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - const char *name, int name_len, - u64 inode_objectid, u64 ref_objectid, int mod); +int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int mod, + u64 *ret_index); int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid); @@ -3185,6 +3225,19 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *location, int mod); +struct btrfs_inode_extref * +btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int ins_len, + int cow); + +int btrfs_find_name_in_ext_backref(struct btrfs_path *path, + u64 ref_objectid, const char *name, + int name_len, + struct btrfs_inode_extref **extref_ret); + /* file-item.c */ int btrfs_del_csums(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytenr, u64 len); @@ -3249,6 +3302,8 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *dir, u64 objectid, const char *name, int name_len); +int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len, + int front); int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode, u64 new_size, @@ -3308,16 +3363,27 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); int btrfs_defrag_file(struct inode *inode, struct file *file, struct btrfs_ioctl_defrag_range_args *range, u64 newer_than, unsigned long max_pages); +void btrfs_get_block_group_info(struct list_head *groups_list, + struct btrfs_ioctl_space_info *space); + /* file.c */ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, struct inode *inode); int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); -int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, - int skip_pinned); +void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, + int skip_pinned); +int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace, + u64 start, u64 end, int skip_pinned, + int modified); extern const struct file_operations btrfs_file_operations; -int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, - u64 start, u64 end, u64 *hint_byte, int drop_cache); +int __btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, + struct btrfs_path *path, u64 start, u64 end, + u64 *drop_end, int drop_cache); +int btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, u64 start, + u64 end, int drop_cache); int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, struct inode *inode, u64 start, u64 end); int btrfs_release_file(struct inode *inode, struct file *file); @@ -3378,6 +3444,11 @@ static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, } } +/* + * Call btrfs_abort_transaction as early as possible when an error condition is + * detected, that way the exact line number is reported. + */ + #define btrfs_abort_transaction(trans, root, errno) \ do { \ __btrfs_abort_transaction(trans, root, __func__, \ diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 52c85e2b95d0..478f66bdc57b 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -29,7 +29,7 @@ static struct kmem_cache *delayed_node_cache; int __init btrfs_delayed_inode_init(void) { - delayed_node_cache = kmem_cache_create("delayed_node", + delayed_node_cache = kmem_cache_create("btrfs_delayed_node", sizeof(struct btrfs_delayed_node), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, @@ -650,7 +650,7 @@ static int btrfs_delayed_inode_reserve_metadata( * we're accounted for. */ if (!src_rsv || (!trans->bytes_reserved && - src_rsv != &root->fs_info->delalloc_block_rsv)) { + src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) { ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes); /* * Since we're under a transaction reserve_metadata_bytes could @@ -668,7 +668,7 @@ static int btrfs_delayed_inode_reserve_metadata( num_bytes, 1); } return ret; - } else if (src_rsv == &root->fs_info->delalloc_block_rsv) { + } else if (src_rsv->type == BTRFS_BLOCK_RSV_DELALLOC) { spin_lock(&BTRFS_I(inode)->lock); if (test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED, &BTRFS_I(inode)->runtime_flags)) { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 22e98e04c2ea..7cda51995c1e 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -46,6 +46,10 @@ #include "check-integrity.h" #include "rcu-string.h" +#ifdef CONFIG_X86 +#include <asm/cpufeature.h> +#endif + static struct extent_io_ops btree_extent_io_ops; static void end_workqueue_fn(struct btrfs_work *work); static void free_fs_root(struct btrfs_root *root); @@ -217,26 +221,16 @@ static struct extent_map *btree_get_extent(struct inode *inode, write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); if (ret == -EEXIST) { - u64 failed_start = em->start; - u64 failed_len = em->len; - free_extent_map(em); em = lookup_extent_mapping(em_tree, start, len); - if (em) { - ret = 0; - } else { - em = lookup_extent_mapping(em_tree, failed_start, - failed_len); - ret = -EIO; - } + if (!em) + em = ERR_PTR(-EIO); } else if (ret) { free_extent_map(em); - em = NULL; + em = ERR_PTR(ret); } write_unlock(&em_tree->lock); - if (ret) - em = ERR_PTR(ret); out: return em; } @@ -439,10 +433,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) WARN_ON(1); return 0; } - if (eb->pages[0] != page) { - WARN_ON(1); - return 0; - } if (!PageUptodate(page)) { WARN_ON(1); return 0; @@ -869,10 +859,22 @@ static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); } +static int check_async_write(struct inode *inode, unsigned long bio_flags) +{ + if (bio_flags & EXTENT_BIO_TREE_LOG) + return 0; +#ifdef CONFIG_X86 + if (cpu_has_xmm4_2) + return 0; +#endif + return 1; +} + static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, int mirror_num, unsigned long bio_flags, u64 bio_offset) { + int async = check_async_write(inode, bio_flags); int ret; if (!(rw & REQ_WRITE)) { @@ -887,6 +889,12 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, return ret; return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 0); + } else if (!async) { + ret = btree_csum_one_bio(bio); + if (ret) + return ret; + return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, + mirror_num, 0); } /* @@ -1168,8 +1176,8 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, atomic_set(&root->log_commit[0], 0); atomic_set(&root->log_commit[1], 0); atomic_set(&root->log_writers, 0); + atomic_set(&root->log_batch, 0); atomic_set(&root->orphan_inodes, 0); - root->log_batch = 0; root->log_transid = 0; root->last_log_commit = 0; extent_io_tree_init(&root->dirty_log_pages, @@ -1667,9 +1675,10 @@ static int transaction_kthread(void *arg) spin_unlock(&root->fs_info->trans_lock); /* If the file system is aborted, this will always fail. */ - trans = btrfs_join_transaction(root); + trans = btrfs_attach_transaction(root); if (IS_ERR(trans)) { - cannot_commit = true; + if (PTR_ERR(trans) != -ENOENT) + cannot_commit = true; goto sleep; } if (transid == trans->transid) { @@ -1994,13 +2003,11 @@ int open_ctree(struct super_block *sb, INIT_LIST_HEAD(&fs_info->trans_list); INIT_LIST_HEAD(&fs_info->dead_roots); INIT_LIST_HEAD(&fs_info->delayed_iputs); - INIT_LIST_HEAD(&fs_info->hashers); INIT_LIST_HEAD(&fs_info->delalloc_inodes); INIT_LIST_HEAD(&fs_info->ordered_operations); INIT_LIST_HEAD(&fs_info->caching_block_groups); spin_lock_init(&fs_info->delalloc_lock); spin_lock_init(&fs_info->trans_lock); - spin_lock_init(&fs_info->ref_cache_lock); spin_lock_init(&fs_info->fs_roots_radix_lock); spin_lock_init(&fs_info->delayed_iput_lock); spin_lock_init(&fs_info->defrag_inodes_lock); @@ -2014,12 +2021,15 @@ int open_ctree(struct super_block *sb, INIT_LIST_HEAD(&fs_info->space_info); INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); btrfs_mapping_init(&fs_info->mapping_tree); - btrfs_init_block_rsv(&fs_info->global_block_rsv); - btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); - btrfs_init_block_rsv(&fs_info->trans_block_rsv); - btrfs_init_block_rsv(&fs_info->chunk_block_rsv); - btrfs_init_block_rsv(&fs_info->empty_block_rsv); - btrfs_init_block_rsv(&fs_info->delayed_block_rsv); + btrfs_init_block_rsv(&fs_info->global_block_rsv, + BTRFS_BLOCK_RSV_GLOBAL); + btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, + BTRFS_BLOCK_RSV_DELALLOC); + btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); + btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); + btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); + btrfs_init_block_rsv(&fs_info->delayed_block_rsv, + BTRFS_BLOCK_RSV_DELOPS); atomic_set(&fs_info->nr_async_submits, 0); atomic_set(&fs_info->async_delalloc_pages, 0); atomic_set(&fs_info->async_submit_draining, 0); @@ -2491,6 +2501,8 @@ retry_root_backup: printk(KERN_ERR "Failed to read block groups: %d\n", ret); goto fail_block_groups; } + fs_info->num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, "btrfs-cleaner"); @@ -2874,12 +2886,10 @@ static int write_dev_flush(struct btrfs_device *device, int wait) printk_in_rcu("btrfs: disabling barriers on dev %s\n", rcu_str_deref(device->name)); device->nobarriers = 1; - } - if (!bio_flagged(bio, BIO_UPTODATE)) { + } else if (!bio_flagged(bio, BIO_UPTODATE)) { ret = -EIO; - if (!bio_flagged(bio, BIO_EOPNOTSUPP)) - btrfs_dev_stat_inc_and_print(device, - BTRFS_DEV_STAT_FLUSH_ERRS); + btrfs_dev_stat_inc_and_print(device, + BTRFS_DEV_STAT_FLUSH_ERRS); } /* drop the reference from the wait == 0 run */ @@ -2918,14 +2928,15 @@ static int barrier_all_devices(struct btrfs_fs_info *info) { struct list_head *head; struct btrfs_device *dev; - int errors = 0; + int errors_send = 0; + int errors_wait = 0; int ret; /* send down all the barriers */ head = &info->fs_devices->devices; list_for_each_entry_rcu(dev, head, dev_list) { if (!dev->bdev) { - errors++; + errors_send++; continue; } if (!dev->in_fs_metadata || !dev->writeable) @@ -2933,13 +2944,13 @@ static int barrier_all_devices(struct btrfs_fs_info *info) ret = write_dev_flush(dev, 0); if (ret) - errors++; + errors_send++; } /* wait for all the barriers */ list_for_each_entry_rcu(dev, head, dev_list) { if (!dev->bdev) { - errors++; + errors_wait++; continue; } if (!dev->in_fs_metadata || !dev->writeable) @@ -2947,13 +2958,87 @@ static int barrier_all_devices(struct btrfs_fs_info *info) ret = write_dev_flush(dev, 1); if (ret) - errors++; + errors_wait++; } - if (errors) + if (errors_send > info->num_tolerated_disk_barrier_failures || + errors_wait > info->num_tolerated_disk_barrier_failures) return -EIO; return 0; } +int btrfs_calc_num_tolerated_disk_barrier_failures( + struct btrfs_fs_info *fs_info) +{ + struct btrfs_ioctl_space_info space; + struct btrfs_space_info *sinfo; + u64 types[] = {BTRFS_BLOCK_GROUP_DATA, + BTRFS_BLOCK_GROUP_SYSTEM, + BTRFS_BLOCK_GROUP_METADATA, + BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; + int num_types = 4; + int i; + int c; + int num_tolerated_disk_barrier_failures = + (int)fs_info->fs_devices->num_devices; + + for (i = 0; i < num_types; i++) { + struct btrfs_space_info *tmp; + + sinfo = NULL; + rcu_read_lock(); + list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { + if (tmp->flags == types[i]) { + sinfo = tmp; + break; + } + } + rcu_read_unlock(); + + if (!sinfo) + continue; + + down_read(&sinfo->groups_sem); + for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { + if (!list_empty(&sinfo->block_groups[c])) { + u64 flags; + + btrfs_get_block_group_info( + &sinfo->block_groups[c], &space); + if (space.total_bytes == 0 || + space.used_bytes == 0) + continue; + flags = space.flags; + /* + * return + * 0: if dup, single or RAID0 is configured for + * any of metadata, system or data, else + * 1: if RAID5 is configured, or if RAID1 or + * RAID10 is configured and only two mirrors + * are used, else + * 2: if RAID6 is configured, else + * num_mirrors - 1: if RAID1 or RAID10 is + * configured and more than + * 2 mirrors are used. + */ + if (num_tolerated_disk_barrier_failures > 0 && + ((flags & (BTRFS_BLOCK_GROUP_DUP | + BTRFS_BLOCK_GROUP_RAID0)) || + ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) + == 0))) + num_tolerated_disk_barrier_failures = 0; + else if (num_tolerated_disk_barrier_failures > 1 + && + (flags & (BTRFS_BLOCK_GROUP_RAID1 | + BTRFS_BLOCK_GROUP_RAID10))) + num_tolerated_disk_barrier_failures = 1; + } + } + up_read(&sinfo->groups_sem); + } + + return num_tolerated_disk_barrier_failures; +} + int write_all_supers(struct btrfs_root *root, int max_mirrors) { struct list_head *head; @@ -2976,8 +3061,16 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors) mutex_lock(&root->fs_info->fs_devices->device_list_mutex); head = &root->fs_info->fs_devices->devices; - if (do_barriers) - barrier_all_devices(root->fs_info); + if (do_barriers) { + ret = barrier_all_devices(root->fs_info); + if (ret) { + mutex_unlock( + &root->fs_info->fs_devices->device_list_mutex); + btrfs_error(root->fs_info, ret, + "errors while submitting device barriers."); + return ret; + } + } list_for_each_entry_rcu(dev, head, dev_list) { if (!dev->bdev) { @@ -3211,10 +3304,6 @@ int close_ctree(struct btrfs_root *root) printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", (unsigned long long)fs_info->delalloc_bytes); } - if (fs_info->total_ref_cache_size) { - printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", - (unsigned long long)fs_info->total_ref_cache_size); - } free_extent_buffer(fs_info->extent_root->node); free_extent_buffer(fs_info->extent_root->commit_root); @@ -3360,52 +3449,6 @@ int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); } -int btree_lock_page_hook(struct page *page, void *data, - void (*flush_fn)(void *)) -{ - struct inode *inode = page->mapping->host; - struct btrfs_root *root = BTRFS_I(inode)->root; - struct extent_buffer *eb; - - /* - * We culled this eb but the page is still hanging out on the mapping, - * carry on. - */ - if (!PagePrivate(page)) - goto out; - - eb = (struct extent_buffer *)page->private; - if (!eb) { - WARN_ON(1); - goto out; - } - if (page != eb->pages[0]) - goto out; - - if (!btrfs_try_tree_write_lock(eb)) { - flush_fn(data); - btrfs_tree_lock(eb); - } - btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); - - if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { - spin_lock(&root->fs_info->delalloc_lock); - if (root->fs_info->dirty_metadata_bytes >= eb->len) - root->fs_info->dirty_metadata_bytes -= eb->len; - else - WARN_ON(1); - spin_unlock(&root->fs_info->delalloc_lock); - } - - btrfs_tree_unlock(eb); -out: - if (!trylock_page(page)) { - flush_fn(data); - lock_page(page); - } - return 0; -} - static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, int read_only) { @@ -3608,7 +3651,7 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root, while (1) { ret = find_first_extent_bit(dirty_pages, start, &start, &end, - mark); + mark, NULL); if (ret) break; @@ -3663,7 +3706,7 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root, again: while (1) { ret = find_first_extent_bit(unpin, 0, &start, &end, - EXTENT_DIRTY); + EXTENT_DIRTY, NULL); if (ret) break; @@ -3800,7 +3843,6 @@ int btrfs_cleanup_transaction(struct btrfs_root *root) } static struct extent_io_ops btree_extent_io_ops = { - .write_cache_pages_lock_hook = btree_lock_page_hook, .readpage_end_io_hook = btree_readpage_end_io_hook, .readpage_io_failed_hook = btree_io_failed_hook, .submit_bio_hook = btree_submit_bio_hook, diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index c5b00a735fef..2025a9132c16 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -95,6 +95,8 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, u64 objectid); int btree_lock_page_hook(struct page *page, void *data, void (*flush_fn)(void *)); +int btrfs_calc_num_tolerated_disk_barrier_failures( + struct btrfs_fs_info *fs_info); #ifdef CONFIG_DEBUG_LOCK_ALLOC void btrfs_init_lockdep(void); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index ba58024d40d3..3d3e2c17d8d1 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -94,8 +94,8 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, u64 flags, struct btrfs_disk_key *key, int level, struct btrfs_key *ins); static int do_chunk_alloc(struct btrfs_trans_handle *trans, - struct btrfs_root *extent_root, u64 alloc_bytes, - u64 flags, int force); + struct btrfs_root *extent_root, u64 flags, + int force); static int find_next_key(struct btrfs_path *path, int level, struct btrfs_key *key); static void dump_space_info(struct btrfs_space_info *info, u64 bytes, @@ -312,7 +312,8 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group, while (start < end) { ret = find_first_extent_bit(info->pinned_extents, start, &extent_start, &extent_end, - EXTENT_DIRTY | EXTENT_UPTODATE); + EXTENT_DIRTY | EXTENT_UPTODATE, + NULL); if (ret) break; @@ -2361,10 +2362,6 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, } next: - do_chunk_alloc(trans, fs_info->extent_root, - 2 * 1024 * 1024, - btrfs_get_alloc_profile(root, 0), - CHUNK_ALLOC_NO_FORCE); cond_resched(); spin_lock(&delayed_refs->lock); } @@ -2478,10 +2475,6 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, if (root == root->fs_info->extent_root) root = root->fs_info->tree_root; - do_chunk_alloc(trans, root->fs_info->extent_root, - 2 * 1024 * 1024, btrfs_get_alloc_profile(root, 0), - CHUNK_ALLOC_NO_FORCE); - btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info); delayed_refs = &trans->transaction->delayed_refs; @@ -2551,6 +2544,12 @@ again: } if (run_all) { + if (!list_empty(&trans->new_bgs)) { + spin_unlock(&delayed_refs->lock); + btrfs_create_pending_block_groups(trans, root); + spin_lock(&delayed_refs->lock); + } + node = rb_first(&delayed_refs->root); if (!node) goto out; @@ -3406,7 +3405,6 @@ alloc: return PTR_ERR(trans); ret = do_chunk_alloc(trans, root->fs_info->extent_root, - bytes + 2 * 1024 * 1024, alloc_target, CHUNK_ALLOC_NO_FORCE); btrfs_end_transaction(trans, root); @@ -3488,8 +3486,7 @@ static void force_metadata_allocation(struct btrfs_fs_info *info) } static int should_alloc_chunk(struct btrfs_root *root, - struct btrfs_space_info *sinfo, u64 alloc_bytes, - int force) + struct btrfs_space_info *sinfo, int force) { struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv; u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly; @@ -3504,7 +3501,8 @@ static int should_alloc_chunk(struct btrfs_root *root, * and purposes it's used space. Don't worry about locking the * global_rsv, it doesn't change except when the transaction commits. */ - num_allocated += global_rsv->size; + if (sinfo->flags & BTRFS_BLOCK_GROUP_METADATA) + num_allocated += global_rsv->size; /* * in limited mode, we want to have some free space up to @@ -3518,15 +3516,8 @@ static int should_alloc_chunk(struct btrfs_root *root, if (num_bytes - num_allocated < thresh) return 1; } - thresh = btrfs_super_total_bytes(root->fs_info->super_copy); - /* 256MB or 2% of the FS */ - thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2)); - /* system chunks need a much small threshold */ - if (sinfo->flags & BTRFS_BLOCK_GROUP_SYSTEM) - thresh = 32 * 1024 * 1024; - - if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8)) + if (num_allocated + 2 * 1024 * 1024 < div_factor(num_bytes, 8)) return 0; return 1; } @@ -3576,8 +3567,7 @@ static void check_system_chunk(struct btrfs_trans_handle *trans, } static int do_chunk_alloc(struct btrfs_trans_handle *trans, - struct btrfs_root *extent_root, u64 alloc_bytes, - u64 flags, int force) + struct btrfs_root *extent_root, u64 flags, int force) { struct btrfs_space_info *space_info; struct btrfs_fs_info *fs_info = extent_root->fs_info; @@ -3601,7 +3591,7 @@ again: return 0; } - if (!should_alloc_chunk(extent_root, space_info, alloc_bytes, force)) { + if (!should_alloc_chunk(extent_root, space_info, force)) { spin_unlock(&space_info->lock); return 0; } else if (space_info->chunk_alloc) { @@ -3669,6 +3659,46 @@ out: return ret; } +static int can_overcommit(struct btrfs_root *root, + struct btrfs_space_info *space_info, u64 bytes, + int flush) +{ + u64 profile = btrfs_get_alloc_profile(root, 0); + u64 avail; + u64 used; + + used = space_info->bytes_used + space_info->bytes_reserved + + space_info->bytes_pinned + space_info->bytes_readonly + + space_info->bytes_may_use; + + spin_lock(&root->fs_info->free_chunk_lock); + avail = root->fs_info->free_chunk_space; + spin_unlock(&root->fs_info->free_chunk_lock); + + /* + * If we have dup, raid1 or raid10 then only half of the free + * space is actually useable. + */ + if (profile & (BTRFS_BLOCK_GROUP_DUP | + BTRFS_BLOCK_GROUP_RAID1 | + BTRFS_BLOCK_GROUP_RAID10)) + avail >>= 1; + + /* + * If we aren't flushing don't let us overcommit too much, say + * 1/8th of the space. If we can flush, let it overcommit up to + * 1/2 of the space. + */ + if (flush) + avail >>= 3; + else + avail >>= 1; + + if (used + bytes < space_info->total_bytes + avail) + return 1; + return 0; +} + /* * shrink metadata reservation for delalloc */ @@ -3693,7 +3723,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, if (delalloc_bytes == 0) { if (trans) return; - btrfs_wait_ordered_extents(root, 0, 0); + btrfs_wait_ordered_extents(root, 0); return; } @@ -3703,11 +3733,15 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages, WB_REASON_FS_FREE_SPACE); + /* + * We need to wait for the async pages to actually start before + * we do anything. + */ + wait_event(root->fs_info->async_submit_wait, + !atomic_read(&root->fs_info->async_delalloc_pages)); + spin_lock(&space_info->lock); - if (space_info->bytes_used + space_info->bytes_reserved + - space_info->bytes_pinned + space_info->bytes_readonly + - space_info->bytes_may_use + orig <= - space_info->total_bytes) { + if (can_overcommit(root, space_info, orig, !trans)) { spin_unlock(&space_info->lock); break; } @@ -3715,7 +3749,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, loops++; if (wait_ordered && !trans) { - btrfs_wait_ordered_extents(root, 0, 0); + btrfs_wait_ordered_extents(root, 0); } else { time_left = schedule_timeout_killable(1); if (time_left) @@ -3784,11 +3818,12 @@ commit: } enum flush_state { - FLUSH_DELALLOC = 1, - FLUSH_DELALLOC_WAIT = 2, - FLUSH_DELAYED_ITEMS_NR = 3, - FLUSH_DELAYED_ITEMS = 4, - COMMIT_TRANS = 5, + FLUSH_DELAYED_ITEMS_NR = 1, + FLUSH_DELAYED_ITEMS = 2, + FLUSH_DELALLOC = 3, + FLUSH_DELALLOC_WAIT = 4, + ALLOC_CHUNK = 5, + COMMIT_TRANS = 6, }; static int flush_space(struct btrfs_root *root, @@ -3800,11 +3835,6 @@ static int flush_space(struct btrfs_root *root, int ret = 0; switch (state) { - case FLUSH_DELALLOC: - case FLUSH_DELALLOC_WAIT: - shrink_delalloc(root, num_bytes, orig_bytes, - state == FLUSH_DELALLOC_WAIT); - break; case FLUSH_DELAYED_ITEMS_NR: case FLUSH_DELAYED_ITEMS: if (state == FLUSH_DELAYED_ITEMS_NR) { @@ -3825,6 +3855,24 @@ static int flush_space(struct btrfs_root *root, ret = btrfs_run_delayed_items_nr(trans, root, nr); btrfs_end_transaction(trans, root); break; + case FLUSH_DELALLOC: + case FLUSH_DELALLOC_WAIT: + shrink_delalloc(root, num_bytes, orig_bytes, + state == FLUSH_DELALLOC_WAIT); + break; + case ALLOC_CHUNK: + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + break; + } + ret = do_chunk_alloc(trans, root->fs_info->extent_root, + btrfs_get_alloc_profile(root, 0), + CHUNK_ALLOC_NO_FORCE); + btrfs_end_transaction(trans, root); + if (ret == -ENOSPC) + ret = 0; + break; case COMMIT_TRANS: ret = may_commit_transaction(root, space_info, orig_bytes, 0); break; @@ -3856,10 +3904,9 @@ static int reserve_metadata_bytes(struct btrfs_root *root, struct btrfs_space_info *space_info = block_rsv->space_info; u64 used; u64 num_bytes = orig_bytes; - int flush_state = FLUSH_DELALLOC; + int flush_state = FLUSH_DELAYED_ITEMS_NR; int ret = 0; bool flushing = false; - bool committed = false; again: ret = 0; @@ -3922,57 +3969,12 @@ again: (orig_bytes * 2); } - if (ret) { - u64 profile = btrfs_get_alloc_profile(root, 0); - u64 avail; - - /* - * If we have a lot of space that's pinned, don't bother doing - * the overcommit dance yet and just commit the transaction. - */ - avail = (space_info->total_bytes - space_info->bytes_used) * 8; - do_div(avail, 10); - if (space_info->bytes_pinned >= avail && flush && !committed) { - space_info->flush = 1; - flushing = true; - spin_unlock(&space_info->lock); - ret = may_commit_transaction(root, space_info, - orig_bytes, 1); - if (ret) - goto out; - committed = true; - goto again; - } - - spin_lock(&root->fs_info->free_chunk_lock); - avail = root->fs_info->free_chunk_space; - - /* - * If we have dup, raid1 or raid10 then only half of the free - * space is actually useable. - */ - if (profile & (BTRFS_BLOCK_GROUP_DUP | - BTRFS_BLOCK_GROUP_RAID1 | - BTRFS_BLOCK_GROUP_RAID10)) - avail >>= 1; - - /* - * If we aren't flushing don't let us overcommit too much, say - * 1/8th of the space. If we can flush, let it overcommit up to - * 1/2 of the space. - */ - if (flush) - avail >>= 3; - else - avail >>= 1; - spin_unlock(&root->fs_info->free_chunk_lock); - - if (used + num_bytes < space_info->total_bytes + avail) { - space_info->bytes_may_use += orig_bytes; - trace_btrfs_space_reservation(root->fs_info, - "space_info", space_info->flags, orig_bytes, 1); - ret = 0; - } + if (ret && can_overcommit(root, space_info, orig_bytes, flush)) { + space_info->bytes_may_use += orig_bytes; + trace_btrfs_space_reservation(root->fs_info, "space_info", + space_info->flags, orig_bytes, + 1); + ret = 0; } /* @@ -4114,13 +4116,15 @@ static int block_rsv_migrate_bytes(struct btrfs_block_rsv *src, return 0; } -void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv) +void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type) { memset(rsv, 0, sizeof(*rsv)); spin_lock_init(&rsv->lock); + rsv->type = type; } -struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root) +struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, + unsigned short type) { struct btrfs_block_rsv *block_rsv; struct btrfs_fs_info *fs_info = root->fs_info; @@ -4129,7 +4133,7 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root) if (!block_rsv) return NULL; - btrfs_init_block_rsv(block_rsv); + btrfs_init_block_rsv(block_rsv, type); block_rsv->space_info = __find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA); return block_rsv; @@ -4138,6 +4142,8 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root) void btrfs_free_block_rsv(struct btrfs_root *root, struct btrfs_block_rsv *rsv) { + if (!rsv) + return; btrfs_block_rsv_release(root, rsv, (u64)-1); kfree(rsv); } @@ -4416,10 +4422,10 @@ int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, struct btrfs_block_rsv *src_rsv = get_block_rsv(trans, root); struct btrfs_block_rsv *dst_rsv = &pending->block_rsv; /* - * two for root back/forward refs, two for directory entries - * and one for root of the snapshot. + * two for root back/forward refs, two for directory entries, + * one for root of the snapshot and one for parent inode. */ - u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5); + u64 num_bytes = btrfs_calc_trans_metadata_size(root, 6); dst_rsv->space_info = src_rsv->space_info; return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes); } @@ -5018,7 +5024,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, while (1) { ret = find_first_extent_bit(unpin, 0, &start, &end, - EXTENT_DIRTY); + EXTENT_DIRTY, NULL); if (ret) break; @@ -5096,8 +5102,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = remove_extent_backref(trans, extent_root, path, NULL, refs_to_drop, is_data); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } btrfs_release_path(path); path->leave_spinning = 1; @@ -5115,8 +5123,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, btrfs_print_leaf(extent_root, path->nodes[0]); } - if (ret < 0) - goto abort; + if (ret < 0) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } extent_slot = path->slots[0]; } } else if (ret == -ENOENT) { @@ -5130,7 +5140,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, (unsigned long long)owner_objectid, (unsigned long long)owner_offset); } else { - goto abort; + btrfs_abort_transaction(trans, extent_root, ret); + goto out; } leaf = path->nodes[0]; @@ -5140,8 +5151,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, BUG_ON(found_extent || extent_slot != path->slots[0]); ret = convert_extent_item_v0(trans, extent_root, path, owner_objectid, 0); - if (ret < 0) - goto abort; + if (ret < 0) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } btrfs_release_path(path); path->leave_spinning = 1; @@ -5158,8 +5171,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, (unsigned long long)bytenr); btrfs_print_leaf(extent_root, path->nodes[0]); } - if (ret < 0) - goto abort; + if (ret < 0) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } + extent_slot = path->slots[0]; leaf = path->nodes[0]; item_size = btrfs_item_size_nr(leaf, extent_slot); @@ -5196,8 +5212,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = remove_extent_backref(trans, extent_root, path, iref, refs_to_drop, is_data); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } } } else { if (found_extent) { @@ -5214,27 +5232,29 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, ret = btrfs_del_items(trans, extent_root, path, path->slots[0], num_to_del); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } btrfs_release_path(path); if (is_data) { ret = btrfs_del_csums(trans, root, bytenr, num_bytes); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } } ret = update_block_group(trans, root, bytenr, num_bytes, 0); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, extent_root, ret); + goto out; + } } out: btrfs_free_path(path); return ret; - -abort: - btrfs_abort_transaction(trans, extent_root, ret); - goto out; } /* @@ -5497,8 +5517,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_block_group_cache *used_block_group; u64 search_start = 0; int empty_cluster = 2 * 1024 * 1024; - int allowed_chunk_alloc = 0; - int done_chunk_alloc = 0; struct btrfs_space_info *space_info; int loop = 0; int index = 0; @@ -5530,9 +5548,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, if (btrfs_mixed_space_info(space_info)) use_cluster = false; - if (orig_root->ref_cows || empty_size) - allowed_chunk_alloc = 1; - if (data & BTRFS_BLOCK_GROUP_METADATA && use_cluster) { last_ptr = &root->fs_info->meta_alloc_cluster; if (!btrfs_test_opt(root, SSD)) @@ -5806,10 +5821,6 @@ checks: trace_btrfs_reserve_extent(orig_root, block_group, search_start, num_bytes); - if (offset < search_start) - btrfs_add_free_space(used_block_group, offset, - search_start - offset); - BUG_ON(offset > search_start); if (used_block_group != block_group) btrfs_put_block_group(used_block_group); btrfs_put_block_group(block_group); @@ -5842,34 +5853,17 @@ loop: index = 0; loop++; if (loop == LOOP_ALLOC_CHUNK) { - if (allowed_chunk_alloc) { - ret = do_chunk_alloc(trans, root, num_bytes + - 2 * 1024 * 1024, data, - CHUNK_ALLOC_LIMITED); - /* - * Do not bail out on ENOSPC since we - * can do more things. - */ - if (ret < 0 && ret != -ENOSPC) { - btrfs_abort_transaction(trans, - root, ret); - goto out; - } - allowed_chunk_alloc = 0; - if (ret == 1) - done_chunk_alloc = 1; - } else if (!done_chunk_alloc && - space_info->force_alloc == - CHUNK_ALLOC_NO_FORCE) { - space_info->force_alloc = CHUNK_ALLOC_LIMITED; + ret = do_chunk_alloc(trans, root, data, + CHUNK_ALLOC_FORCE); + /* + * Do not bail out on ENOSPC since we + * can do more things. + */ + if (ret < 0 && ret != -ENOSPC) { + btrfs_abort_transaction(trans, + root, ret); + goto out; } - - /* - * We didn't allocate a chunk, go ahead and drop the - * empty size and loop again. - */ - if (!done_chunk_alloc) - loop = LOOP_NO_EMPTY_SIZE; } if (loop == LOOP_NO_EMPTY_SIZE) { @@ -5944,20 +5938,6 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, data = btrfs_get_alloc_profile(root, data); again: - /* - * the only place that sets empty_size is btrfs_realloc_node, which - * is not called recursively on allocations - */ - if (empty_size || root->ref_cows) { - ret = do_chunk_alloc(trans, root->fs_info->extent_root, - num_bytes + 2 * 1024 * 1024, data, - CHUNK_ALLOC_NO_FORCE); - if (ret < 0 && ret != -ENOSPC) { - btrfs_abort_transaction(trans, root, ret); - return ret; - } - } - WARN_ON(num_bytes < root->sectorsize); ret = find_free_extent(trans, root, num_bytes, empty_size, hint_byte, ins, data); @@ -5967,12 +5947,6 @@ again: num_bytes = num_bytes >> 1; num_bytes = num_bytes & ~(root->sectorsize - 1); num_bytes = max(num_bytes, min_alloc_size); - ret = do_chunk_alloc(trans, root->fs_info->extent_root, - num_bytes, data, CHUNK_ALLOC_FORCE); - if (ret < 0 && ret != -ENOSPC) { - btrfs_abort_transaction(trans, root, ret); - return ret; - } if (num_bytes == min_alloc_size) final_tried = true; goto again; @@ -6314,7 +6288,7 @@ use_block_rsv(struct btrfs_trans_handle *trans, ret = block_rsv_use_bytes(block_rsv, blocksize); if (!ret) return block_rsv; - if (ret) { + if (ret && !block_rsv->failfast) { static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, /*DEFAULT_RATELIMIT_BURST*/ 2); @@ -7279,7 +7253,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root, alloc_flags = update_block_group_flags(root, cache->flags); if (alloc_flags != cache->flags) { - ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, + ret = do_chunk_alloc(trans, root, alloc_flags, CHUNK_ALLOC_FORCE); if (ret < 0) goto out; @@ -7289,7 +7263,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root, if (!ret) goto out; alloc_flags = get_alloc_profile(root, cache->space_info->flags); - ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, + ret = do_chunk_alloc(trans, root, alloc_flags, CHUNK_ALLOC_FORCE); if (ret < 0) goto out; @@ -7303,7 +7277,7 @@ int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 type) { u64 alloc_flags = get_alloc_profile(root, type); - return do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags, + return do_chunk_alloc(trans, root, alloc_flags, CHUNK_ALLOC_FORCE); } @@ -7810,6 +7784,34 @@ error: return ret; } +void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, + struct btrfs_root *root) +{ + struct btrfs_block_group_cache *block_group, *tmp; + struct btrfs_root *extent_root = root->fs_info->extent_root; + struct btrfs_block_group_item item; + struct btrfs_key key; + int ret = 0; + + list_for_each_entry_safe(block_group, tmp, &trans->new_bgs, + new_bg_list) { + list_del_init(&block_group->new_bg_list); + + if (ret) + continue; + + spin_lock(&block_group->lock); + memcpy(&item, &block_group->item, sizeof(item)); + memcpy(&key, &block_group->key, sizeof(key)); + spin_unlock(&block_group->lock); + + ret = btrfs_insert_item(trans, extent_root, &key, &item, + sizeof(item)); + if (ret) + btrfs_abort_transaction(trans, extent_root, ret); + } +} + int btrfs_make_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytes_used, u64 type, u64 chunk_objectid, u64 chunk_offset, @@ -7843,6 +7845,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, spin_lock_init(&cache->lock); INIT_LIST_HEAD(&cache->list); INIT_LIST_HEAD(&cache->cluster_list); + INIT_LIST_HEAD(&cache->new_bg_list); btrfs_init_free_space_ctl(cache); @@ -7874,12 +7877,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, ret = btrfs_add_block_group_cache(root->fs_info, cache); BUG_ON(ret); /* Logic error */ - ret = btrfs_insert_item(trans, extent_root, &cache->key, &cache->item, - sizeof(cache->item)); - if (ret) { - btrfs_abort_transaction(trans, extent_root, ret); - return ret; - } + list_add_tail(&cache->new_bg_list, &trans->new_bgs); set_avail_alloc_bits(extent_root->fs_info, type); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index b08ea4717e9d..8036d3a84853 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -45,6 +45,7 @@ struct extent_page_data { struct bio *bio; struct extent_io_tree *tree; get_extent_t *get_extent; + unsigned long bio_flags; /* tells writepage not to lock the state bits for this range * it still does the unlocking @@ -64,13 +65,13 @@ tree_fs_info(struct extent_io_tree *tree) int __init extent_io_init(void) { - extent_state_cache = kmem_cache_create("extent_state", + extent_state_cache = kmem_cache_create("btrfs_extent_state", sizeof(struct extent_state), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!extent_state_cache) return -ENOMEM; - extent_buffer_cache = kmem_cache_create("extent_buffers", + extent_buffer_cache = kmem_cache_create("btrfs_extent_buffer", sizeof(struct extent_buffer), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!extent_buffer_cache) @@ -942,6 +943,7 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits, * @end: the end offset in bytes (inclusive) * @bits: the bits to set in this range * @clear_bits: the bits to clear in this range + * @cached_state: state that we're going to cache * @mask: the allocation mask * * This will go through and set bits for the given range. If any states exist @@ -951,7 +953,8 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits, * boundary bits like LOCK. */ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, - int bits, int clear_bits, gfp_t mask) + int bits, int clear_bits, + struct extent_state **cached_state, gfp_t mask) { struct extent_state *state; struct extent_state *prealloc = NULL; @@ -968,6 +971,15 @@ again: } spin_lock(&tree->lock); + if (cached_state && *cached_state) { + state = *cached_state; + if (state->start <= start && state->end > start && + state->tree) { + node = &state->rb_node; + goto hit_next; + } + } + /* * this search will find all the extents that end after * our range starts. @@ -998,6 +1010,7 @@ hit_next: */ if (state->start == start && state->end <= end) { set_state_bits(tree, state, &bits); + cache_state(state, cached_state); state = clear_state_bit(tree, state, &clear_bits, 0); if (last_end == (u64)-1) goto out; @@ -1038,6 +1051,7 @@ hit_next: goto out; if (state->end <= end) { set_state_bits(tree, state, &bits); + cache_state(state, cached_state); state = clear_state_bit(tree, state, &clear_bits, 0); if (last_end == (u64)-1) goto out; @@ -1076,6 +1090,7 @@ hit_next: &bits); if (err) extent_io_tree_panic(tree, err); + cache_state(prealloc, cached_state); prealloc = NULL; start = this_end + 1; goto search_again; @@ -1098,6 +1113,7 @@ hit_next: extent_io_tree_panic(tree, err); set_state_bits(tree, prealloc, &bits); + cache_state(prealloc, cached_state); clear_state_bit(tree, prealloc, &clear_bits, 0); prealloc = NULL; goto out; @@ -1150,6 +1166,14 @@ int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, NULL, cached_state, mask); } +int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask) +{ + return set_extent_bit(tree, start, end, + EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, + NULL, cached_state, mask); +} + int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) { @@ -1294,18 +1318,42 @@ out: * If nothing was found, 1 is returned. If found something, return 0. */ int find_first_extent_bit(struct extent_io_tree *tree, u64 start, - u64 *start_ret, u64 *end_ret, int bits) + u64 *start_ret, u64 *end_ret, int bits, + struct extent_state **cached_state) { struct extent_state *state; + struct rb_node *n; int ret = 1; spin_lock(&tree->lock); + if (cached_state && *cached_state) { + state = *cached_state; + if (state->end == start - 1 && state->tree) { + n = rb_next(&state->rb_node); + while (n) { + state = rb_entry(n, struct extent_state, + rb_node); + if (state->state & bits) + goto got_it; + n = rb_next(n); + } + free_extent_state(*cached_state); + *cached_state = NULL; + goto out; + } + free_extent_state(*cached_state); + *cached_state = NULL; + } + state = find_first_extent_bit_state(tree, start, bits); +got_it: if (state) { + cache_state(state, cached_state); *start_ret = state->start; *end_ret = state->end; ret = 0; } +out: spin_unlock(&tree->lock); return ret; } @@ -2068,7 +2116,7 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page, } read_unlock(&em_tree->lock); - if (!em || IS_ERR(em)) { + if (!em) { kfree(failrec); return -EIO; } @@ -2304,8 +2352,8 @@ static void end_bio_extent_readpage(struct bio *bio, int err) struct extent_state *cached = NULL; struct extent_state *state; - pr_debug("end_bio_extent_readpage: bi_vcnt=%d, idx=%d, err=%d, " - "mirror=%ld\n", bio->bi_vcnt, bio->bi_idx, err, + pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, " + "mirror=%ld\n", (u64)bio->bi_sector, err, (long int)bio->bi_bdev); tree = &BTRFS_I(page->mapping->host)->io_tree; @@ -2709,12 +2757,15 @@ static int __extent_read_full_page(struct extent_io_tree *tree, end_bio_extent_readpage, mirror_num, *bio_flags, this_bio_flag); - BUG_ON(ret == -ENOMEM); - nr++; - *bio_flags = this_bio_flag; + if (!ret) { + nr++; + *bio_flags = this_bio_flag; + } } - if (ret) + if (ret) { SetPageError(page); + unlock_extent(tree, cur, cur + iosize - 1); + } cur = cur + iosize; pg_offset += iosize; } @@ -3161,12 +3212,16 @@ static int write_one_eb(struct extent_buffer *eb, struct block_device *bdev = fs_info->fs_devices->latest_bdev; u64 offset = eb->start; unsigned long i, num_pages; + unsigned long bio_flags = 0; int rw = (epd->sync_io ? WRITE_SYNC : WRITE); int ret = 0; clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags); num_pages = num_extent_pages(eb->start, eb->len); atomic_set(&eb->io_pages, num_pages); + if (btrfs_header_owner(eb) == BTRFS_TREE_LOG_OBJECTID) + bio_flags = EXTENT_BIO_TREE_LOG; + for (i = 0; i < num_pages; i++) { struct page *p = extent_buffer_page(eb, i); @@ -3175,7 +3230,8 @@ static int write_one_eb(struct extent_buffer *eb, ret = submit_extent_page(rw, eb->tree, p, offset >> 9, PAGE_CACHE_SIZE, 0, bdev, &epd->bio, -1, end_bio_extent_buffer_writepage, - 0, 0, 0); + 0, epd->bio_flags, bio_flags); + epd->bio_flags = bio_flags; if (ret) { set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); SetPageError(p); @@ -3210,6 +3266,7 @@ int btree_write_cache_pages(struct address_space *mapping, .tree = tree, .extent_locked = 0, .sync_io = wbc->sync_mode == WB_SYNC_ALL, + .bio_flags = 0, }; int ret = 0; int done = 0; @@ -3254,19 +3311,34 @@ retry: break; } + spin_lock(&mapping->private_lock); + if (!PagePrivate(page)) { + spin_unlock(&mapping->private_lock); + continue; + } + eb = (struct extent_buffer *)page->private; + + /* + * Shouldn't happen and normally this would be a BUG_ON + * but no sense in crashing the users box for something + * we can survive anyway. + */ if (!eb) { + spin_unlock(&mapping->private_lock); WARN_ON(1); continue; } - if (eb == prev_eb) + if (eb == prev_eb) { + spin_unlock(&mapping->private_lock); continue; + } - if (!atomic_inc_not_zero(&eb->refs)) { - WARN_ON(1); + ret = atomic_inc_not_zero(&eb->refs); + spin_unlock(&mapping->private_lock); + if (!ret) continue; - } prev_eb = eb; ret = lock_extent_buffer_for_io(eb, fs_info, &epd); @@ -3457,7 +3529,7 @@ static void flush_epd_write_bio(struct extent_page_data *epd) if (epd->sync_io) rw = WRITE_SYNC; - ret = submit_one_bio(rw, epd->bio, 0, 0); + ret = submit_one_bio(rw, epd->bio, 0, epd->bio_flags); BUG_ON(ret < 0); /* -ENOMEM */ epd->bio = NULL; } @@ -3480,6 +3552,7 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page, .get_extent = get_extent, .extent_locked = 0, .sync_io = wbc->sync_mode == WB_SYNC_ALL, + .bio_flags = 0, }; ret = __extent_writepage(page, wbc, &epd); @@ -3504,6 +3577,7 @@ int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, .get_extent = get_extent, .extent_locked = 1, .sync_io = mode == WB_SYNC_ALL, + .bio_flags = 0, }; struct writeback_control wbc_writepages = { .sync_mode = mode, @@ -3543,6 +3617,7 @@ int extent_writepages(struct extent_io_tree *tree, .get_extent = get_extent, .extent_locked = 0, .sync_io = wbc->sync_mode == WB_SYNC_ALL, + .bio_flags = 0, }; ret = extent_write_cache_pages(tree, mapping, wbc, @@ -3920,18 +3995,6 @@ out: return ret; } -inline struct page *extent_buffer_page(struct extent_buffer *eb, - unsigned long i) -{ - return eb->pages[i]; -} - -inline unsigned long num_extent_pages(u64 start, u64 len) -{ - return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - - (start >> PAGE_CACHE_SHIFT); -} - static void __free_extent_buffer(struct extent_buffer *eb) { #if LEAK_DEBUG @@ -4047,7 +4110,7 @@ struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len) return eb; err: - for (i--; i > 0; i--) + for (i--; i >= 0; i--) __free_page(eb->pages[i]); __free_extent_buffer(eb); return NULL; @@ -4192,10 +4255,8 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, for (i = 0; i < num_pages; i++, index++) { p = find_or_create_page(mapping, index, GFP_NOFS); - if (!p) { - WARN_ON(1); + if (!p) goto free_eb; - } spin_lock(&mapping->private_lock); if (PagePrivate(p)) { @@ -4338,7 +4399,6 @@ static int release_extent_buffer(struct extent_buffer *eb, gfp_t mask) /* Should be safe to release our pages at this point */ btrfs_release_extent_buffer_page(eb, 0); - call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu); return 1; } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 25900af5b15d..711d12b80028 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -27,6 +27,7 @@ * type for this bio */ #define EXTENT_BIO_COMPRESSED 1 +#define EXTENT_BIO_TREE_LOG 2 #define EXTENT_BIO_FLAG_SHIFT 16 /* these are bit numbers for test/set bit */ @@ -232,11 +233,15 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, - int bits, int clear_bits, gfp_t mask); + int bits, int clear_bits, + struct extent_state **cached_state, gfp_t mask); int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask); +int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask); int find_first_extent_bit(struct extent_io_tree *tree, u64 start, - u64 *start_ret, u64 *end_ret, int bits); + u64 *start_ret, u64 *end_ret, int bits, + struct extent_state **cached_state); struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, u64 start, int bits); int extent_invalidatepage(struct extent_io_tree *tree, @@ -277,8 +282,18 @@ void free_extent_buffer_stale(struct extent_buffer *eb); int read_extent_buffer_pages(struct extent_io_tree *tree, struct extent_buffer *eb, u64 start, int wait, get_extent_t *get_extent, int mirror_num); -unsigned long num_extent_pages(u64 start, u64 len); -struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i); + +static inline unsigned long num_extent_pages(u64 start, u64 len) +{ + return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - + (start >> PAGE_CACHE_SHIFT); +} + +static inline struct page *extent_buffer_page(struct extent_buffer *eb, + unsigned long i) +{ + return eb->pages[i]; +} static inline void extent_buffer_get(struct extent_buffer *eb) { diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 7c97b3301459..b8cbc8d5c7f7 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -11,7 +11,7 @@ static struct kmem_cache *extent_map_cache; int __init extent_map_init(void) { - extent_map_cache = kmem_cache_create("extent_map", + extent_map_cache = kmem_cache_create("btrfs_extent_map", sizeof(struct extent_map), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!extent_map_cache) @@ -35,6 +35,7 @@ void extent_map_exit(void) void extent_map_tree_init(struct extent_map_tree *tree) { tree->map = RB_ROOT; + INIT_LIST_HEAD(&tree->modified_extents); rwlock_init(&tree->lock); } @@ -54,7 +55,9 @@ struct extent_map *alloc_extent_map(void) em->in_tree = 0; em->flags = 0; em->compress_type = BTRFS_COMPRESS_NONE; + em->generation = 0; atomic_set(&em->refs, 1); + INIT_LIST_HEAD(&em->list); return em; } @@ -72,6 +75,7 @@ void free_extent_map(struct extent_map *em) WARN_ON(atomic_read(&em->refs) == 0); if (atomic_dec_and_test(&em->refs)) { WARN_ON(em->in_tree); + WARN_ON(!list_empty(&em->list)); kmem_cache_free(extent_map_cache, em); } } @@ -198,6 +202,14 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) em->block_len += merge->block_len; em->block_start = merge->block_start; merge->in_tree = 0; + if (merge->generation > em->generation) { + em->mod_start = em->start; + em->mod_len = em->len; + em->generation = merge->generation; + list_move(&em->list, &tree->modified_extents); + } + + list_del_init(&merge->list); rb_erase(&merge->rb_node, &tree->map); free_extent_map(merge); } @@ -211,14 +223,34 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) em->block_len += merge->len; rb_erase(&merge->rb_node, &tree->map); merge->in_tree = 0; + if (merge->generation > em->generation) { + em->mod_len = em->len; + em->generation = merge->generation; + list_move(&em->list, &tree->modified_extents); + } + list_del_init(&merge->list); free_extent_map(merge); } } -int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len) +/** + * unpint_extent_cache - unpin an extent from the cache + * @tree: tree to unpin the extent in + * @start: logical offset in the file + * @len: length of the extent + * @gen: generation that this extent has been modified in + * @prealloc: if this is set we need to clear the prealloc flag + * + * Called after an extent has been written to disk properly. Set the generation + * to the generation that actually added the file item to the inode so we know + * we need to sync this extent when we call fsync(). + */ +int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, + u64 gen) { int ret = 0; struct extent_map *em; + bool prealloc = false; write_lock(&tree->lock); em = lookup_extent_mapping(tree, start, len); @@ -228,10 +260,24 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len) if (!em) goto out; + list_move(&em->list, &tree->modified_extents); + em->generation = gen; clear_bit(EXTENT_FLAG_PINNED, &em->flags); + em->mod_start = em->start; + em->mod_len = em->len; + + if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) { + prealloc = true; + clear_bit(EXTENT_FLAG_PREALLOC, &em->flags); + } try_merge_map(tree, em); + if (prealloc) { + em->mod_start = em->start; + em->mod_len = em->len; + } + free_extent_map(em); out: write_unlock(&tree->lock); @@ -269,6 +315,9 @@ int add_extent_mapping(struct extent_map_tree *tree, } atomic_inc(&em->refs); + em->mod_start = em->start; + em->mod_len = em->len; + try_merge_map(tree, em); out: return ret; @@ -358,6 +407,8 @@ int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em) WARN_ON(test_bit(EXTENT_FLAG_PINNED, &em->flags)); rb_erase(&em->rb_node, &tree->map); + if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags)) + list_del_init(&em->list); em->in_tree = 0; return ret; } diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 1195f09761fe..679225555f7b 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -13,6 +13,7 @@ #define EXTENT_FLAG_COMPRESSED 1 #define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ #define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */ +#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */ struct extent_map { struct rb_node rb_node; @@ -20,18 +21,23 @@ struct extent_map { /* all of these are in bytes */ u64 start; u64 len; + u64 mod_start; + u64 mod_len; u64 orig_start; u64 block_start; u64 block_len; + u64 generation; unsigned long flags; struct block_device *bdev; atomic_t refs; unsigned int in_tree; unsigned int compress_type; + struct list_head list; }; struct extent_map_tree { struct rb_root map; + struct list_head modified_extents; rwlock_t lock; }; @@ -60,7 +66,7 @@ struct extent_map *alloc_extent_map(void); void free_extent_map(struct extent_map *em); int __init extent_map_init(void); void extent_map_exit(void); -int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len); +int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen); struct extent_map *search_extent_mapping(struct extent_map_tree *tree, u64 start, u64 len); #endif diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 857d93cd01dc..1ad08e4e4a15 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -25,11 +25,12 @@ #include "transaction.h" #include "print-tree.h" -#define __MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \ +#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \ sizeof(struct btrfs_item) * 2) / \ size) - 1)) -#define MAX_CSUM_ITEMS(r, size) (min(__MAX_CSUM_ITEMS(r, size), PAGE_CACHE_SIZE)) +#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \ + PAGE_CACHE_SIZE)) #define MAX_ORDERED_SUM_BYTES(r) ((PAGE_SIZE - \ sizeof(struct btrfs_ordered_sum)) / \ diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index f6b40e86121b..9ab1bed88116 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -39,6 +39,7 @@ #include "tree-log.h" #include "locking.h" #include "compat.h" +#include "volumes.h" /* * when auto defrag is enabled we @@ -458,14 +459,15 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, * this drops all the extents in the cache that intersect the range * [start, end]. Existing extents are split as required. */ -int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, - int skip_pinned) +void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, + int skip_pinned) { struct extent_map *em; struct extent_map *split = NULL; struct extent_map *split2 = NULL; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; u64 len = end - start + 1; + u64 gen; int ret; int testend = 1; unsigned long flags; @@ -477,11 +479,14 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, testend = 0; } while (1) { + int no_splits = 0; + if (!split) split = alloc_extent_map(); if (!split2) split2 = alloc_extent_map(); - BUG_ON(!split || !split2); /* -ENOMEM */ + if (!split || !split2) + no_splits = 1; write_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, start, len); @@ -490,6 +495,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, break; } flags = em->flags; + gen = em->generation; if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) { if (testend && em->start + em->len >= start + len) { free_extent_map(em); @@ -506,6 +512,8 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags); clear_bit(EXTENT_FLAG_PINNED, &em->flags); remove_extent_mapping(em_tree, em); + if (no_splits) + goto next; if (em->block_start < EXTENT_MAP_LAST_BYTE && em->start < start) { @@ -518,12 +526,13 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->block_len = em->block_len; else split->block_len = split->len; - + split->generation = gen; split->bdev = em->bdev; split->flags = flags; split->compress_type = em->compress_type; ret = add_extent_mapping(em_tree, split); BUG_ON(ret); /* Logic error */ + list_move(&split->list, &em_tree->modified_extents); free_extent_map(split); split = split2; split2 = NULL; @@ -537,6 +546,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->bdev = em->bdev; split->flags = flags; split->compress_type = em->compress_type; + split->generation = gen; if (compressed) { split->block_len = em->block_len; @@ -550,9 +560,11 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, ret = add_extent_mapping(em_tree, split); BUG_ON(ret); /* Logic error */ + list_move(&split->list, &em_tree->modified_extents); free_extent_map(split); split = NULL; } +next: write_unlock(&em_tree->lock); /* once for us */ @@ -564,7 +576,6 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, free_extent_map(split); if (split2) free_extent_map(split2); - return 0; } /* @@ -576,13 +587,13 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, * it is either truncated or split. Anything entirely inside the range * is deleted from the tree. */ -int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, - u64 start, u64 end, u64 *hint_byte, int drop_cache) +int __btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, + struct btrfs_path *path, u64 start, u64 end, + u64 *drop_end, int drop_cache) { - struct btrfs_root *root = BTRFS_I(inode)->root; struct extent_buffer *leaf; struct btrfs_file_extent_item *fi; - struct btrfs_path *path; struct btrfs_key key; struct btrfs_key new_key; u64 ino = btrfs_ino(inode); @@ -597,14 +608,12 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, int recow; int ret; int modify_tree = -1; + int update_refs = (root->ref_cows || root == root->fs_info->tree_root); + int found = 0; if (drop_cache) btrfs_drop_extent_cache(inode, start, end - 1, 0); - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - if (start >= BTRFS_I(inode)->disk_i_size) modify_tree = 0; @@ -666,6 +675,7 @@ next_slot: goto next_slot; } + found = 1; search_start = max(key.offset, start); if (recow || !modify_tree) { modify_tree = -1; @@ -707,14 +717,13 @@ next_slot: extent_end - start); btrfs_mark_buffer_dirty(leaf); - if (disk_bytenr > 0) { + if (update_refs && disk_bytenr > 0) { ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0, root->root_key.objectid, new_key.objectid, start - extent_offset, 0); BUG_ON(ret); /* -ENOMEM */ - *hint_byte = disk_bytenr; } key.offset = start; } @@ -734,10 +743,8 @@ next_slot: btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - end); btrfs_mark_buffer_dirty(leaf); - if (disk_bytenr > 0) { + if (update_refs && disk_bytenr > 0) inode_sub_bytes(inode, end - key.offset); - *hint_byte = disk_bytenr; - } break; } @@ -753,10 +760,8 @@ next_slot: btrfs_set_file_extent_num_bytes(leaf, fi, start - key.offset); btrfs_mark_buffer_dirty(leaf); - if (disk_bytenr > 0) { + if (update_refs && disk_bytenr > 0) inode_sub_bytes(inode, extent_end - start); - *hint_byte = disk_bytenr; - } if (end == extent_end) break; @@ -777,12 +782,13 @@ next_slot: del_nr++; } - if (extent_type == BTRFS_FILE_EXTENT_INLINE) { + if (update_refs && + extent_type == BTRFS_FILE_EXTENT_INLINE) { inode_sub_bytes(inode, extent_end - key.offset); extent_end = ALIGN(extent_end, root->sectorsize); - } else if (disk_bytenr > 0) { + } else if (update_refs && disk_bytenr > 0) { ret = btrfs_free_extent(trans, root, disk_bytenr, num_bytes, 0, root->root_key.objectid, @@ -791,7 +797,6 @@ next_slot: BUG_ON(ret); /* -ENOMEM */ inode_sub_bytes(inode, extent_end - key.offset); - *hint_byte = disk_bytenr; } if (end == extent_end) @@ -806,7 +811,7 @@ next_slot: del_nr); if (ret) { btrfs_abort_transaction(trans, root, ret); - goto out; + break; } del_nr = 0; @@ -825,7 +830,24 @@ next_slot: btrfs_abort_transaction(trans, root, ret); } -out: + if (drop_end) + *drop_end = found ? min(end, extent_end) : end; + btrfs_release_path(path); + return ret; +} + +int btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, u64 start, + u64 end, int drop_cache) +{ + struct btrfs_path *path; + int ret; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + ret = __btrfs_drop_extents(trans, root, inode, path, start, end, NULL, + drop_cache); btrfs_free_path(path); return ret; } @@ -892,8 +914,6 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, int ret; u64 ino = btrfs_ino(inode); - btrfs_drop_extent_cache(inode, start, end - 1, 0); - path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -935,12 +955,16 @@ again: btrfs_set_item_key_safe(trans, root, path, &new_key); fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, + trans->transid); btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - end); btrfs_set_file_extent_offset(leaf, fi, end - orig_offset); fi = btrfs_item_ptr(leaf, path->slots[0] - 1, struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, + trans->transid); btrfs_set_file_extent_num_bytes(leaf, fi, end - other_start); btrfs_mark_buffer_dirty(leaf); @@ -958,12 +982,16 @@ again: struct btrfs_file_extent_item); btrfs_set_file_extent_num_bytes(leaf, fi, start - key.offset); + btrfs_set_file_extent_generation(leaf, fi, + trans->transid); path->slots[0]++; new_key.offset = start; btrfs_set_item_key_safe(trans, root, path, &new_key); fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, + trans->transid); btrfs_set_file_extent_num_bytes(leaf, fi, other_end - start); btrfs_set_file_extent_offset(leaf, fi, @@ -991,12 +1019,14 @@ again: leaf = path->nodes[0]; fi = btrfs_item_ptr(leaf, path->slots[0] - 1, struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, trans->transid); btrfs_set_file_extent_num_bytes(leaf, fi, split - key.offset); fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, trans->transid); btrfs_set_file_extent_offset(leaf, fi, split - orig_offset); btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - split); @@ -1056,12 +1086,14 @@ again: struct btrfs_file_extent_item); btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG); + btrfs_set_file_extent_generation(leaf, fi, trans->transid); btrfs_mark_buffer_dirty(leaf); } else { fi = btrfs_item_ptr(leaf, del_slot - 1, struct btrfs_file_extent_item); btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG); + btrfs_set_file_extent_generation(leaf, fi, trans->transid); btrfs_set_file_extent_num_bytes(leaf, fi, extent_end - key.offset); btrfs_mark_buffer_dirty(leaf); @@ -1173,8 +1205,8 @@ again: clear_extent_bit(&BTRFS_I(inode)->io_tree, start_pos, last_pos - 1, EXTENT_DIRTY | EXTENT_DELALLOC | - EXTENT_DO_ACCOUNTING, 0, 0, &cached_state, - GFP_NOFS); + EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, + 0, 0, &cached_state, GFP_NOFS); unlock_extent_cached(&BTRFS_I(inode)->io_tree, start_pos, last_pos - 1, &cached_state, GFP_NOFS); @@ -1514,16 +1546,24 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) trace_btrfs_sync_file(file, datasync); + /* + * We write the dirty pages in the range and wait until they complete + * out of the ->i_mutex. If so, we can flush the dirty pages by + * multi-task, and make the performance up. + */ + ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + if (ret) + return ret; + mutex_lock(&inode->i_mutex); /* - * we wait first, since the writeback may change the inode, also wait - * ordered range does a filemape_write_and_wait_range which is why we - * don't do it above like other file systems. + * We flush the dirty pages again to avoid some dirty pages in the + * range being left. */ - root->log_batch++; + atomic_inc(&root->log_batch); btrfs_wait_ordered_range(inode, start, end); - root->log_batch++; + atomic_inc(&root->log_batch); /* * check the transaction that last modified this inode @@ -1544,6 +1584,14 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) BTRFS_I(inode)->last_trans <= root->fs_info->last_trans_committed) { BTRFS_I(inode)->last_trans = 0; + + /* + * We'v had everything committed since the last time we were + * modified so clear this flag in case it was set for whatever + * reason, it's no longer relevant. + */ + clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); mutex_unlock(&inode->i_mutex); goto out; } @@ -1615,6 +1663,324 @@ static int btrfs_file_mmap(struct file *filp, struct vm_area_struct *vma) return 0; } +static int hole_mergeable(struct inode *inode, struct extent_buffer *leaf, + int slot, u64 start, u64 end) +{ + struct btrfs_file_extent_item *fi; + struct btrfs_key key; + + if (slot < 0 || slot >= btrfs_header_nritems(leaf)) + return 0; + + btrfs_item_key_to_cpu(leaf, &key, slot); + if (key.objectid != btrfs_ino(inode) || + key.type != BTRFS_EXTENT_DATA_KEY) + return 0; + + fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); + + if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_REG) + return 0; + + if (btrfs_file_extent_disk_bytenr(leaf, fi)) + return 0; + + if (key.offset == end) + return 1; + if (key.offset + btrfs_file_extent_num_bytes(leaf, fi) == start) + return 1; + return 0; +} + +static int fill_holes(struct btrfs_trans_handle *trans, struct inode *inode, + struct btrfs_path *path, u64 offset, u64 end) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + struct extent_buffer *leaf; + struct btrfs_file_extent_item *fi; + struct extent_map *hole_em; + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct btrfs_key key; + int ret; + + key.objectid = btrfs_ino(inode); + key.type = BTRFS_EXTENT_DATA_KEY; + key.offset = offset; + + + ret = btrfs_search_slot(trans, root, &key, path, 0, 1); + if (ret < 0) + return ret; + BUG_ON(!ret); + + leaf = path->nodes[0]; + if (hole_mergeable(inode, leaf, path->slots[0]-1, offset, end)) { + u64 num_bytes; + + path->slots[0]--; + fi = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + num_bytes = btrfs_file_extent_num_bytes(leaf, fi) + + end - offset; + btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes); + btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes); + btrfs_set_file_extent_offset(leaf, fi, 0); + btrfs_mark_buffer_dirty(leaf); + goto out; + } + + if (hole_mergeable(inode, leaf, path->slots[0]+1, offset, end)) { + u64 num_bytes; + + path->slots[0]++; + key.offset = offset; + btrfs_set_item_key_safe(trans, root, path, &key); + fi = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + num_bytes = btrfs_file_extent_num_bytes(leaf, fi) + end - + offset; + btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes); + btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes); + btrfs_set_file_extent_offset(leaf, fi, 0); + btrfs_mark_buffer_dirty(leaf); + goto out; + } + btrfs_release_path(path); + + ret = btrfs_insert_file_extent(trans, root, btrfs_ino(inode), offset, + 0, 0, end - offset, 0, end - offset, + 0, 0, 0); + if (ret) + return ret; + +out: + btrfs_release_path(path); + + hole_em = alloc_extent_map(); + if (!hole_em) { + btrfs_drop_extent_cache(inode, offset, end - 1, 0); + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + } else { + hole_em->start = offset; + hole_em->len = end - offset; + hole_em->orig_start = offset; + + hole_em->block_start = EXTENT_MAP_HOLE; + hole_em->block_len = 0; + hole_em->bdev = root->fs_info->fs_devices->latest_bdev; + hole_em->compress_type = BTRFS_COMPRESS_NONE; + hole_em->generation = trans->transid; + + do { + btrfs_drop_extent_cache(inode, offset, end - 1, 0); + write_lock(&em_tree->lock); + ret = add_extent_mapping(em_tree, hole_em); + if (!ret) + list_move(&hole_em->list, + &em_tree->modified_extents); + write_unlock(&em_tree->lock); + } while (ret == -EEXIST); + free_extent_map(hole_em); + if (ret) + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + } + + return 0; +} + +static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + struct extent_state *cached_state = NULL; + struct btrfs_path *path; + struct btrfs_block_rsv *rsv; + struct btrfs_trans_handle *trans; + u64 mask = BTRFS_I(inode)->root->sectorsize - 1; + u64 lockstart = (offset + mask) & ~mask; + u64 lockend = ((offset + len) & ~mask) - 1; + u64 cur_offset = lockstart; + u64 min_size = btrfs_calc_trunc_metadata_size(root, 1); + u64 drop_end; + unsigned long nr; + int ret = 0; + int err = 0; + bool same_page = (offset >> PAGE_CACHE_SHIFT) == + ((offset + len) >> PAGE_CACHE_SHIFT); + + btrfs_wait_ordered_range(inode, offset, len); + + mutex_lock(&inode->i_mutex); + if (offset >= inode->i_size) { + mutex_unlock(&inode->i_mutex); + return 0; + } + + /* + * Only do this if we are in the same page and we aren't doing the + * entire page. + */ + if (same_page && len < PAGE_CACHE_SIZE) { + ret = btrfs_truncate_page(inode, offset, len, 0); + mutex_unlock(&inode->i_mutex); + return ret; + } + + /* zero back part of the first page */ + ret = btrfs_truncate_page(inode, offset, 0, 0); + if (ret) { + mutex_unlock(&inode->i_mutex); + return ret; + } + + /* zero the front end of the last page */ + ret = btrfs_truncate_page(inode, offset + len, 0, 1); + if (ret) { + mutex_unlock(&inode->i_mutex); + return ret; + } + + if (lockend < lockstart) { + mutex_unlock(&inode->i_mutex); + return 0; + } + + while (1) { + struct btrfs_ordered_extent *ordered; + + truncate_pagecache_range(inode, lockstart, lockend); + + lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, + 0, &cached_state); + ordered = btrfs_lookup_first_ordered_extent(inode, lockend); + + /* + * We need to make sure we have no ordered extents in this range + * and nobody raced in and read a page in this range, if we did + * we need to try again. + */ + if ((!ordered || + (ordered->file_offset + ordered->len < lockstart || + ordered->file_offset > lockend)) && + !test_range_bit(&BTRFS_I(inode)->io_tree, lockstart, + lockend, EXTENT_UPTODATE, 0, + cached_state)) { + if (ordered) + btrfs_put_ordered_extent(ordered); + break; + } + if (ordered) + btrfs_put_ordered_extent(ordered); + unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, + lockend, &cached_state, GFP_NOFS); + btrfs_wait_ordered_range(inode, lockstart, + lockend - lockstart + 1); + } + + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto out; + } + + rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP); + if (!rsv) { + ret = -ENOMEM; + goto out_free; + } + rsv->size = btrfs_calc_trunc_metadata_size(root, 1); + rsv->failfast = 1; + + /* + * 1 - update the inode + * 1 - removing the extents in the range + * 1 - adding the hole extent + */ + trans = btrfs_start_transaction(root, 3); + if (IS_ERR(trans)) { + err = PTR_ERR(trans); + goto out_free; + } + + ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv, rsv, + min_size); + BUG_ON(ret); + trans->block_rsv = rsv; + + while (cur_offset < lockend) { + ret = __btrfs_drop_extents(trans, root, inode, path, + cur_offset, lockend + 1, + &drop_end, 1); + if (ret != -ENOSPC) + break; + + trans->block_rsv = &root->fs_info->trans_block_rsv; + + ret = fill_holes(trans, inode, path, cur_offset, drop_end); + if (ret) { + err = ret; + break; + } + + cur_offset = drop_end; + + ret = btrfs_update_inode(trans, root, inode); + if (ret) { + err = ret; + break; + } + + nr = trans->blocks_used; + btrfs_end_transaction(trans, root); + btrfs_btree_balance_dirty(root, nr); + + trans = btrfs_start_transaction(root, 3); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + trans = NULL; + break; + } + + ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv, + rsv, min_size); + BUG_ON(ret); /* shouldn't happen */ + trans->block_rsv = rsv; + } + + if (ret) { + err = ret; + goto out_trans; + } + + trans->block_rsv = &root->fs_info->trans_block_rsv; + ret = fill_holes(trans, inode, path, cur_offset, drop_end); + if (ret) { + err = ret; + goto out_trans; + } + +out_trans: + if (!trans) + goto out_free; + + trans->block_rsv = &root->fs_info->trans_block_rsv; + ret = btrfs_update_inode(trans, root, inode); + nr = trans->blocks_used; + btrfs_end_transaction(trans, root); + btrfs_btree_balance_dirty(root, nr); +out_free: + btrfs_free_path(path); + btrfs_free_block_rsv(root, rsv); +out: + unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend, + &cached_state, GFP_NOFS); + mutex_unlock(&inode->i_mutex); + if (ret && !err) + err = ret; + return err; +} + static long btrfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) { @@ -1633,15 +1999,18 @@ static long btrfs_fallocate(struct file *file, int mode, alloc_start = offset & ~mask; alloc_end = (offset + len + mask) & ~mask; - /* We only support the FALLOC_FL_KEEP_SIZE mode */ - if (mode & ~FALLOC_FL_KEEP_SIZE) + /* Make sure we aren't being give some crap mode */ + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; + if (mode & FALLOC_FL_PUNCH_HOLE) + return btrfs_punch_hole(inode, offset, len); + /* * Make sure we have enough space before we do the * allocation. */ - ret = btrfs_check_data_free_space(inode, len); + ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start + 1); if (ret) return ret; @@ -1748,7 +2117,7 @@ static long btrfs_fallocate(struct file *file, int mode, out: mutex_unlock(&inode->i_mutex); /* Let go of our reservation. */ - btrfs_free_reserved_data_space(inode, len); + btrfs_free_reserved_data_space(inode, alloc_end - alloc_start + 1); return ret; } diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 6b10acfc2f5c..1027b854b90c 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -966,7 +966,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode, block_group->key.offset)) { ret = find_first_extent_bit(unpin, start, &extent_start, &extent_end, - EXTENT_DIRTY); + EXTENT_DIRTY, NULL); if (ret) { ret = 0; break; @@ -1454,9 +1454,7 @@ static int search_bitmap(struct btrfs_free_space_ctl *ctl, max_t(u64, *offset, bitmap_info->offset)); bits = bytes_to_bits(*bytes, ctl->unit); - for (i = find_next_bit(bitmap_info->bitmap, BITS_PER_BITMAP, i); - i < BITS_PER_BITMAP; - i = find_next_bit(bitmap_info->bitmap, BITS_PER_BITMAP, i + 1)) { + for_each_set_bit_from(i, bitmap_info->bitmap, BITS_PER_BITMAP) { next_zero = find_next_zero_bit(bitmap_info->bitmap, BITS_PER_BITMAP, i); if ((next_zero - i) >= bits) { @@ -2307,9 +2305,7 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group, again: found_bits = 0; - for (i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, i); - i < BITS_PER_BITMAP; - i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, i + 1)) { + for_each_set_bit_from(i, entry->bitmap, BITS_PER_BITMAP) { next_zero = find_next_zero_bit(entry->bitmap, BITS_PER_BITMAP, i); if (next_zero - i >= min_bits) { diff --git a/fs/btrfs/hash.h b/fs/btrfs/hash.h index db2ff9773b99..1d982812ab67 100644 --- a/fs/btrfs/hash.h +++ b/fs/btrfs/hash.h @@ -24,4 +24,14 @@ static inline u64 btrfs_name_hash(const char *name, int len) { return crc32c((u32)~1, name, len); } + +/* + * Figure the key offset of an extended inode ref + */ +static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, + int len) +{ + return (u64) crc32c(parent_objectid, name, len); +} + #endif diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index a13cf1a96c73..48b8fda93132 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -18,6 +18,7 @@ #include "ctree.h" #include "disk-io.h" +#include "hash.h" #include "transaction.h" #include "print-tree.h" @@ -50,18 +51,57 @@ static int find_name_in_backref(struct btrfs_path *path, const char *name, return 0; } -struct btrfs_inode_ref * +int btrfs_find_name_in_ext_backref(struct btrfs_path *path, u64 ref_objectid, + const char *name, int name_len, + struct btrfs_inode_extref **extref_ret) +{ + struct extent_buffer *leaf; + struct btrfs_inode_extref *extref; + unsigned long ptr; + unsigned long name_ptr; + u32 item_size; + u32 cur_offset = 0; + int ref_name_len; + + leaf = path->nodes[0]; + item_size = btrfs_item_size_nr(leaf, path->slots[0]); + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + + /* + * Search all extended backrefs in this item. We're only + * looking through any collisions so most of the time this is + * just going to compare against one buffer. If all is well, + * we'll return success and the inode ref object. + */ + while (cur_offset < item_size) { + extref = (struct btrfs_inode_extref *) (ptr + cur_offset); + name_ptr = (unsigned long)(&extref->name); + ref_name_len = btrfs_inode_extref_name_len(leaf, extref); + + if (ref_name_len == name_len && + btrfs_inode_extref_parent(leaf, extref) == ref_objectid && + (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)) { + if (extref_ret) + *extref_ret = extref; + return 1; + } + + cur_offset += ref_name_len + sizeof(*extref); + } + return 0; +} + +static struct btrfs_inode_ref * btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - const char *name, int name_len, - u64 inode_objectid, u64 ref_objectid, int mod) + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int ins_len, + int cow) { + int ret; struct btrfs_key key; struct btrfs_inode_ref *ref; - int ins_len = mod < 0 ? -1 : 0; - int cow = mod != 0; - int ret; key.objectid = inode_objectid; key.type = BTRFS_INODE_REF_KEY; @@ -77,13 +117,150 @@ btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, return ref; } -int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, +/* Returns NULL if no extref found */ +struct btrfs_inode_extref * +btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int ins_len, + int cow) +{ + int ret; + struct btrfs_key key; + struct btrfs_inode_extref *extref; + + key.objectid = inode_objectid; + key.type = BTRFS_INODE_EXTREF_KEY; + key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + + ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); + if (ret < 0) + return ERR_PTR(ret); + if (ret > 0) + return NULL; + if (!btrfs_find_name_in_ext_backref(path, ref_objectid, name, name_len, &extref)) + return NULL; + return extref; +} + +int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int mod, + u64 *ret_index) +{ + struct btrfs_inode_ref *ref; + struct btrfs_inode_extref *extref; + int ins_len = mod < 0 ? -1 : 0; + int cow = mod != 0; + + ref = btrfs_lookup_inode_ref(trans, root, path, name, name_len, + inode_objectid, ref_objectid, ins_len, + cow); + if (IS_ERR(ref)) + return PTR_ERR(ref); + + if (ref != NULL) { + *ret_index = btrfs_inode_ref_index(path->nodes[0], ref); + return 0; + } + + btrfs_release_path(path); + + extref = btrfs_lookup_inode_extref(trans, root, path, name, + name_len, inode_objectid, + ref_objectid, ins_len, cow); + if (IS_ERR(extref)) + return PTR_ERR(extref); + + if (extref) { + *ret_index = btrfs_inode_extref_index(path->nodes[0], extref); + return 0; + } + + return -ENOENT; +} + +int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, u64 inode_objectid, u64 ref_objectid, u64 *index) { struct btrfs_path *path; struct btrfs_key key; + struct btrfs_inode_extref *extref; + struct extent_buffer *leaf; + int ret; + int del_len = name_len + sizeof(*extref); + unsigned long ptr; + unsigned long item_start; + u32 item_size; + + key.objectid = inode_objectid; + btrfs_set_key_type(&key, BTRFS_INODE_EXTREF_KEY); + key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + path->leave_spinning = 1; + + ret = btrfs_search_slot(trans, root, &key, path, -1, 1); + if (ret > 0) + ret = -ENOENT; + if (ret < 0) + goto out; + + /* + * Sanity check - did we find the right item for this name? + * This should always succeed so error here will make the FS + * readonly. + */ + if (!btrfs_find_name_in_ext_backref(path, ref_objectid, + name, name_len, &extref)) { + btrfs_std_error(root->fs_info, -ENOENT); + ret = -EROFS; + goto out; + } + + leaf = path->nodes[0]; + item_size = btrfs_item_size_nr(leaf, path->slots[0]); + if (index) + *index = btrfs_inode_extref_index(leaf, extref); + + if (del_len == item_size) { + /* + * Common case only one ref in the item, remove the + * whole item. + */ + ret = btrfs_del_item(trans, root, path); + goto out; + } + + ptr = (unsigned long)extref; + item_start = btrfs_item_ptr_offset(leaf, path->slots[0]); + + memmove_extent_buffer(leaf, ptr, ptr + del_len, + item_size - (ptr + del_len - item_start)); + + btrfs_truncate_item(trans, root, path, item_size - del_len, 1); + +out: + btrfs_free_path(path); + + return ret; +} + +int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, u64 *index) +{ + struct btrfs_path *path; + struct btrfs_key key; struct btrfs_inode_ref *ref; struct extent_buffer *leaf; unsigned long ptr; @@ -91,6 +268,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, u32 item_size; u32 sub_item_len; int ret; + int search_ext_refs = 0; int del_len = name_len + sizeof(*ref); key.objectid = inode_objectid; @@ -106,12 +284,14 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, ret = btrfs_search_slot(trans, root, &key, path, -1, 1); if (ret > 0) { ret = -ENOENT; + search_ext_refs = 1; goto out; } else if (ret < 0) { goto out; } if (!find_name_in_backref(path, name, name_len, &ref)) { ret = -ENOENT; + search_ext_refs = 1; goto out; } leaf = path->nodes[0]; @@ -129,8 +309,78 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, item_start = btrfs_item_ptr_offset(leaf, path->slots[0]); memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_size - (ptr + sub_item_len - item_start)); - btrfs_truncate_item(trans, root, path, - item_size - sub_item_len, 1); + btrfs_truncate_item(trans, root, path, item_size - sub_item_len, 1); +out: + btrfs_free_path(path); + + if (search_ext_refs) { + /* + * No refs were found, or we could not find the + * name in our ref array. Find and remove the extended + * inode ref then. + */ + return btrfs_del_inode_extref(trans, root, name, name_len, + inode_objectid, ref_objectid, index); + } + + return ret; +} + +/* + * btrfs_insert_inode_extref() - Inserts an extended inode ref into a tree. + * + * The caller must have checked against BTRFS_LINK_MAX already. + */ +static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, u64 index) +{ + struct btrfs_inode_extref *extref; + int ret; + int ins_len = name_len + sizeof(*extref); + unsigned long ptr; + struct btrfs_path *path; + struct btrfs_key key; + struct extent_buffer *leaf; + struct btrfs_item *item; + + key.objectid = inode_objectid; + key.type = BTRFS_INODE_EXTREF_KEY; + key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + path->leave_spinning = 1; + ret = btrfs_insert_empty_item(trans, root, path, &key, + ins_len); + if (ret == -EEXIST) { + if (btrfs_find_name_in_ext_backref(path, ref_objectid, + name, name_len, NULL)) + goto out; + + btrfs_extend_item(trans, root, path, ins_len); + ret = 0; + } + if (ret < 0) + goto out; + + leaf = path->nodes[0]; + item = btrfs_item_nr(leaf, path->slots[0]); + ptr = (unsigned long)btrfs_item_ptr(leaf, path->slots[0], char); + ptr += btrfs_item_size(leaf, item) - ins_len; + extref = (struct btrfs_inode_extref *)ptr; + + btrfs_set_inode_extref_name_len(path->nodes[0], extref, name_len); + btrfs_set_inode_extref_index(path->nodes[0], extref, index); + btrfs_set_inode_extref_parent(path->nodes[0], extref, ref_objectid); + + ptr = (unsigned long)&extref->name; + write_extent_buffer(path->nodes[0], name, ptr, name_len); + btrfs_mark_buffer_dirty(path->nodes[0]); + out: btrfs_free_path(path); return ret; @@ -191,6 +441,19 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, out: btrfs_free_path(path); + + if (ret == -EMLINK) { + struct btrfs_super_block *disk_super = root->fs_info->super_copy; + /* We ran out of space in the ref array. Need to + * add an extended ref. */ + if (btrfs_super_incompat_flags(disk_super) + & BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) + ret = btrfs_insert_inode_extref(trans, root, name, + name_len, + inode_objectid, + ref_objectid, index); + } + return ret; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index a6ed6944e50c..85a1e5053fe6 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -230,7 +230,6 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans, u64 inline_len = actual_end - start; u64 aligned_end = (end + root->sectorsize - 1) & ~((u64)root->sectorsize - 1); - u64 hint_byte; u64 data_len = inline_len; int ret; @@ -247,8 +246,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans, return 1; } - ret = btrfs_drop_extents(trans, inode, start, aligned_end, - &hint_byte, 1); + ret = btrfs_drop_extents(trans, root, inode, start, aligned_end, 1); if (ret) return ret; @@ -664,7 +662,7 @@ retry: async_extent->compressed_size, async_extent->compressed_size, 0, alloc_hint, &ins, 1); - if (ret) + if (ret && ret != -ENOSPC) btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); } @@ -1308,6 +1306,7 @@ out_check: em->block_start = disk_bytenr; em->bdev = root->fs_info->fs_devices->latest_bdev; set_bit(EXTENT_FLAG_PINNED, &em->flags); + set_bit(EXTENT_FLAG_PREALLOC, &em->flags); while (1) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); @@ -1364,11 +1363,7 @@ out_check: } error: - if (nolock) { - err = btrfs_end_transaction_nolock(trans, root); - } else { - err = btrfs_end_transaction(trans, root); - } + err = btrfs_end_transaction(trans, root); if (!ret) ret = err; @@ -1785,7 +1780,6 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, struct btrfs_path *path; struct extent_buffer *leaf; struct btrfs_key ins; - u64 hint; int ret; path = btrfs_alloc_path(); @@ -1803,8 +1797,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, * the caller is expected to unpin it and allow it to be merged * with the others. */ - ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes, - &hint, 0); + ret = btrfs_drop_extents(trans, root, inode, file_pos, + file_pos + num_bytes, 0); if (ret) goto out; @@ -1828,10 +1822,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans, btrfs_set_file_extent_encryption(leaf, fi, encryption); btrfs_set_file_extent_other_encoding(leaf, fi, other_encoding); - btrfs_unlock_up_safe(path, 1); - btrfs_set_lock_blocking(leaf); - btrfs_mark_buffer_dirty(leaf); + btrfs_release_path(path); inode_add_bytes(inode, num_bytes); @@ -1929,11 +1921,10 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent) ordered_extent->len, compress_type, 0, 0, BTRFS_FILE_EXTENT_REG); - unpin_extent_cache(&BTRFS_I(inode)->extent_tree, - ordered_extent->file_offset, - ordered_extent->len); } - + unpin_extent_cache(&BTRFS_I(inode)->extent_tree, + ordered_extent->file_offset, ordered_extent->len, + trans->transid); if (ret < 0) { btrfs_abort_transaction(trans, root, ret); goto out_unlock; @@ -1949,6 +1940,8 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent) btrfs_abort_transaction(trans, root, ret); goto out_unlock; } + } else { + btrfs_set_inode_last_trans(trans, inode); } ret = 0; out_unlock: @@ -1958,12 +1951,8 @@ out_unlock: out: if (root != root->fs_info->tree_root) btrfs_delalloc_release_metadata(inode, ordered_extent->len); - if (trans) { - if (nolock) - btrfs_end_transaction_nolock(trans, root); - else - btrfs_end_transaction(trans, root); - } + if (trans) + btrfs_end_transaction(trans, root); if (ret) clear_extent_uptodate(io_tree, ordered_extent->file_offset, @@ -2119,7 +2108,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root) if (empty) return; - down_read(&root->fs_info->cleanup_work_sem); spin_lock(&fs_info->delayed_iput_lock); list_splice_init(&fs_info->delayed_iputs, &list); spin_unlock(&fs_info->delayed_iput_lock); @@ -2130,7 +2118,6 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root) iput(delayed->inode); kfree(delayed); } - up_read(&root->fs_info->cleanup_work_sem); } enum btrfs_orphan_cleanup_state { @@ -2198,7 +2185,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode) int ret; if (!root->orphan_block_rsv) { - block_rsv = btrfs_alloc_block_rsv(root); + block_rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP); if (!block_rsv) return -ENOMEM; } @@ -2225,7 +2212,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode) insert = 1; #endif insert = 1; - atomic_dec(&root->orphan_inodes); + atomic_inc(&root->orphan_inodes); } if (!test_and_set_bit(BTRFS_INODE_ORPHAN_META_RESERVED, @@ -2590,6 +2577,18 @@ static void btrfs_read_locked_inode(struct inode *inode) inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item)); BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item); + BTRFS_I(inode)->last_trans = btrfs_inode_transid(leaf, inode_item); + + /* + * If we were modified in the current generation and evicted from memory + * and then re-read we need to do a full sync since we don't have any + * idea about which extents were modified before we were evicted from + * cache. + */ + if (BTRFS_I(inode)->last_trans == root->fs_info->generation) + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + inode->i_version = btrfs_inode_sequence(leaf, inode_item); inode->i_generation = BTRFS_I(inode)->generation; inode->i_rdev = 0; @@ -2894,7 +2893,6 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir, struct btrfs_trans_handle *trans; struct btrfs_root *root = BTRFS_I(dir)->root; struct btrfs_path *path; - struct btrfs_inode_ref *ref; struct btrfs_dir_item *di; struct inode *inode = dentry->d_inode; u64 index; @@ -3008,17 +3006,17 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir, } btrfs_release_path(path); - ref = btrfs_lookup_inode_ref(trans, root, path, - dentry->d_name.name, dentry->d_name.len, - ino, dir_ino, 0); - if (IS_ERR(ref)) { - err = PTR_ERR(ref); + ret = btrfs_get_inode_ref_index(trans, root, path, dentry->d_name.name, + dentry->d_name.len, ino, dir_ino, 0, + &index); + if (ret) { + err = ret; goto out; } - BUG_ON(!ref); /* Logic error */ + if (check_path_shared(root, path)) goto out; - index = btrfs_inode_ref_index(path->nodes[0], ref); + btrfs_release_path(path); /* @@ -3061,7 +3059,7 @@ out: static void __unlink_end_trans(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - if (trans->block_rsv == &root->fs_info->global_block_rsv) { + if (trans->block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL) { btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved); trans->block_rsv = &root->fs_info->trans_block_rsv; @@ -3191,9 +3189,10 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) struct btrfs_trans_handle *trans; unsigned long nr = 0; - if (inode->i_size > BTRFS_EMPTY_DIR_SIZE || - btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID) + if (inode->i_size > BTRFS_EMPTY_DIR_SIZE) return -ENOTEMPTY; + if (btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID) + return -EPERM; trans = __unlink_start_trans(dir, dentry); if (IS_ERR(trans)) @@ -3267,8 +3266,13 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, return -ENOMEM; path->reada = -1; + /* + * We want to drop from the next block forward in case this new size is + * not block aligned since we will be keeping the last block of the + * extent just the way it is. + */ if (root->ref_cows || root == root->fs_info->tree_root) - btrfs_drop_extent_cache(inode, new_size & (~mask), (u64)-1, 0); + btrfs_drop_extent_cache(inode, (new_size + mask) & (~mask), (u64)-1, 0); /* * This function is also used to drop the items in the log tree before @@ -3429,12 +3433,6 @@ delete: if (path->slots[0] == 0 || path->slots[0] != pending_del_slot) { - if (root->ref_cows && - BTRFS_I(inode)->location.objectid != - BTRFS_FREE_INO_OBJECTID) { - err = -EAGAIN; - goto out; - } if (pending_del_nr) { ret = btrfs_del_items(trans, root, path, pending_del_slot, @@ -3465,12 +3463,20 @@ error: } /* - * taken from block_truncate_page, but does cow as it zeros out - * any bytes left in the last page in the file. + * btrfs_truncate_page - read, zero a chunk and write a page + * @inode - inode that we're zeroing + * @from - the offset to start zeroing + * @len - the length to zero, 0 to zero the entire range respective to the + * offset + * @front - zero up to the offset instead of from the offset on + * + * This will find the page for the "from" offset and cow the page and zero the + * part we want to zero. This is used with truncate and hole punching. */ -static int btrfs_truncate_page(struct address_space *mapping, loff_t from) +int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len, + int front) { - struct inode *inode = mapping->host; + struct address_space *mapping = inode->i_mapping; struct btrfs_root *root = BTRFS_I(inode)->root; struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_ordered_extent *ordered; @@ -3485,7 +3491,8 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from) u64 page_start; u64 page_end; - if ((offset & (blocksize - 1)) == 0) + if ((offset & (blocksize - 1)) == 0 && + (!len || ((len & (blocksize - 1)) == 0))) goto out; ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE); if (ret) @@ -3532,7 +3539,8 @@ again: } clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end, - EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING, + EXTENT_DIRTY | EXTENT_DELALLOC | + EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, &cached_state, GFP_NOFS); ret = btrfs_set_extent_delalloc(inode, page_start, page_end, @@ -3545,8 +3553,13 @@ again: ret = 0; if (offset != PAGE_CACHE_SIZE) { + if (!len) + len = PAGE_CACHE_SIZE - offset; kaddr = kmap(page); - memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset); + if (front) + memset(kaddr, 0, offset); + else + memset(kaddr + offset, 0, len); flush_dcache_page(page); kunmap(page); } @@ -3577,6 +3590,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct extent_map *em = NULL; struct extent_state *cached_state = NULL; + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; u64 mask = root->sectorsize - 1; u64 hole_start = (oldsize + mask) & ~mask; u64 block_end = (size + mask) & ~mask; @@ -3613,7 +3627,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) last_byte = min(extent_map_end(em), block_end); last_byte = (last_byte + mask) & ~mask; if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) { - u64 hint_byte = 0; + struct extent_map *hole_em; hole_size = last_byte - cur_offset; trans = btrfs_start_transaction(root, 3); @@ -3622,9 +3636,9 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) break; } - err = btrfs_drop_extents(trans, inode, cur_offset, - cur_offset + hole_size, - &hint_byte, 1); + err = btrfs_drop_extents(trans, root, inode, + cur_offset, + cur_offset + hole_size, 1); if (err) { btrfs_abort_transaction(trans, root, err); btrfs_end_transaction(trans, root); @@ -3641,9 +3655,39 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) break; } - btrfs_drop_extent_cache(inode, hole_start, - last_byte - 1, 0); + btrfs_drop_extent_cache(inode, cur_offset, + cur_offset + hole_size - 1, 0); + hole_em = alloc_extent_map(); + if (!hole_em) { + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + goto next; + } + hole_em->start = cur_offset; + hole_em->len = hole_size; + hole_em->orig_start = cur_offset; + hole_em->block_start = EXTENT_MAP_HOLE; + hole_em->block_len = 0; + hole_em->bdev = root->fs_info->fs_devices->latest_bdev; + hole_em->compress_type = BTRFS_COMPRESS_NONE; + hole_em->generation = trans->transid; + + while (1) { + write_lock(&em_tree->lock); + err = add_extent_mapping(em_tree, hole_em); + if (!err) + list_move(&hole_em->list, + &em_tree->modified_extents); + write_unlock(&em_tree->lock); + if (err != -EEXIST) + break; + btrfs_drop_extent_cache(inode, cur_offset, + cur_offset + + hole_size - 1, 0); + } + free_extent_map(hole_em); +next: btrfs_update_inode(trans, root, inode); btrfs_end_transaction(trans, root); } @@ -3768,26 +3812,22 @@ void btrfs_evict_inode(struct inode *inode) goto no_delete; } - rsv = btrfs_alloc_block_rsv(root); + rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP); if (!rsv) { btrfs_orphan_del(NULL, inode); goto no_delete; } rsv->size = min_size; + rsv->failfast = 1; global_rsv = &root->fs_info->global_block_rsv; btrfs_i_size_write(inode, 0); /* - * This is a bit simpler than btrfs_truncate since - * - * 1) We've already reserved our space for our orphan item in the - * unlink. - * 2) We're going to delete the inode item, so we don't need to update - * it at all. - * - * So we just need to reserve some slack space in case we add bytes when - * doing the truncate. + * This is a bit simpler than btrfs_truncate since we've already + * reserved our space for our orphan item in the unlink, so we just + * need to reserve some slack space in case we add bytes and update + * inode item when doing the truncate. */ while (1) { ret = btrfs_block_rsv_refill_noflush(root, rsv, min_size); @@ -3808,7 +3848,7 @@ void btrfs_evict_inode(struct inode *inode) goto no_delete; } - trans = btrfs_start_transaction(root, 0); + trans = btrfs_start_transaction_noflush(root, 1); if (IS_ERR(trans)) { btrfs_orphan_del(NULL, inode); btrfs_free_block_rsv(root, rsv); @@ -3818,9 +3858,13 @@ void btrfs_evict_inode(struct inode *inode) trans->block_rsv = rsv; ret = btrfs_truncate_inode_items(trans, root, inode, 0, 0); - if (ret != -EAGAIN) + if (ret != -ENOSPC) break; + trans->block_rsv = &root->fs_info->trans_block_rsv; + ret = btrfs_update_inode(trans, root, inode); + BUG_ON(ret); + nr = trans->blocks_used; btrfs_end_transaction(trans, root); trans = NULL; @@ -4470,10 +4514,7 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc) trans = btrfs_join_transaction(root); if (IS_ERR(trans)) return PTR_ERR(trans); - if (nolock) - ret = btrfs_end_transaction_nolock(trans, root); - else - ret = btrfs_commit_transaction(trans, root); + ret = btrfs_commit_transaction(trans, root); } return ret; } @@ -4671,6 +4712,14 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, BTRFS_I(inode)->generation = trans->transid; inode->i_generation = BTRFS_I(inode)->generation; + /* + * We could have gotten an inode number from somebody who was fsynced + * and then removed in this same transaction, so let's just set full + * sync since it will be a full sync anyway and this will blow away the + * old info in the log. + */ + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags); + if (S_ISDIR(mode)) owner = 0; else @@ -4680,6 +4729,12 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, btrfs_set_key_type(&key[0], BTRFS_INODE_ITEM_KEY); key[0].offset = 0; + /* + * Start new inodes with an inode_ref. This is slightly more + * efficient for small numbers of hard links since they will + * be packed into one item. Extended refs will kick in if we + * add more hard links than can fit in the ref item. + */ key[1].objectid = objectid; btrfs_set_key_type(&key[1], BTRFS_INODE_REF_KEY); key[1].offset = ref_objectid; @@ -4986,7 +5041,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, if (root->objectid != BTRFS_I(inode)->root->objectid) return -EXDEV; - if (inode->i_nlink == ~0U) + if (inode->i_nlink >= BTRFS_LINK_MAX) return -EMLINK; err = btrfs_set_inode_index(dir, &index); @@ -5450,7 +5505,8 @@ insert: write_unlock(&em_tree->lock); out: - trace_btrfs_get_extent(root, em); + if (em) + trace_btrfs_get_extent(root, em); if (path) btrfs_free_path(path); @@ -5836,6 +5892,48 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend, return ret; } +static struct extent_map *create_pinned_em(struct inode *inode, u64 start, + u64 len, u64 orig_start, + u64 block_start, u64 block_len, + int type) +{ + struct extent_map_tree *em_tree; + struct extent_map *em; + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + em_tree = &BTRFS_I(inode)->extent_tree; + em = alloc_extent_map(); + if (!em) + return ERR_PTR(-ENOMEM); + + em->start = start; + em->orig_start = orig_start; + em->len = len; + em->block_len = block_len; + em->block_start = block_start; + em->bdev = root->fs_info->fs_devices->latest_bdev; + set_bit(EXTENT_FLAG_PINNED, &em->flags); + if (type == BTRFS_ORDERED_PREALLOC) + set_bit(EXTENT_FLAG_PREALLOC, &em->flags); + + do { + btrfs_drop_extent_cache(inode, em->start, + em->start + em->len - 1, 0); + write_lock(&em_tree->lock); + ret = add_extent_mapping(em_tree, em); + write_unlock(&em_tree->lock); + } while (ret == -EEXIST); + + if (ret) { + free_extent_map(em); + return ERR_PTR(ret); + } + + return em; +} + + static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { @@ -5950,6 +6048,19 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, goto must_cow; if (can_nocow_odirect(trans, inode, start, len) == 1) { + u64 orig_start = em->start; + + if (type == BTRFS_ORDERED_PREALLOC) { + free_extent_map(em); + em = create_pinned_em(inode, start, len, + orig_start, + block_start, len, type); + if (IS_ERR(em)) { + btrfs_end_transaction(trans, root); + goto unlock_err; + } + } + ret = btrfs_add_ordered_extent_dio(inode, start, block_start, len, len, type); btrfs_end_transaction(trans, root); @@ -5999,7 +6110,8 @@ unlock: if (lockstart < lockend) { if (create && len < lockend - lockstart) { clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, - lockstart + len - 1, unlock_bits, 1, 0, + lockstart + len - 1, + unlock_bits | EXTENT_DEFRAG, 1, 0, &cached_state, GFP_NOFS); /* * Beside unlock, we also need to cleanup reserved space @@ -6007,8 +6119,8 @@ unlock: */ clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart + len, lockend, - unlock_bits | EXTENT_DO_ACCOUNTING, - 1, 0, NULL, GFP_NOFS); + unlock_bits | EXTENT_DO_ACCOUNTING | + EXTENT_DEFRAG, 1, 0, NULL, GFP_NOFS); } else { clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend, unlock_bits, 1, 0, @@ -6573,8 +6685,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) */ clear_extent_bit(tree, page_start, page_end, EXTENT_DIRTY | EXTENT_DELALLOC | - EXTENT_LOCKED | EXTENT_DO_ACCOUNTING, 1, 0, - &cached_state, GFP_NOFS); + EXTENT_LOCKED | EXTENT_DO_ACCOUNTING | + EXTENT_DEFRAG, 1, 0, &cached_state, GFP_NOFS); /* * whoever cleared the private bit is responsible * for the finish_ordered_io @@ -6590,7 +6702,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) } clear_extent_bit(tree, page_start, page_end, EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC | - EXTENT_DO_ACCOUNTING, 1, 1, &cached_state, GFP_NOFS); + EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 1, 1, + &cached_state, GFP_NOFS); __btrfs_releasepage(page, GFP_NOFS); ClearPageChecked(page); @@ -6687,7 +6800,8 @@ again: * prepare_pages in the normal write path. */ clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end, - EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING, + EXTENT_DIRTY | EXTENT_DELALLOC | + EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, &cached_state, GFP_NOFS); ret = btrfs_set_extent_delalloc(inode, page_start, page_end, @@ -6718,6 +6832,7 @@ again: BTRFS_I(inode)->last_trans = root->fs_info->generation; BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; + BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; unlock_extent_cached(io_tree, page_start, page_end, &cached_state, GFP_NOFS); @@ -6745,7 +6860,7 @@ static int btrfs_truncate(struct inode *inode) u64 mask = root->sectorsize - 1; u64 min_size = btrfs_calc_trunc_metadata_size(root, 1); - ret = btrfs_truncate_page(inode->i_mapping, inode->i_size); + ret = btrfs_truncate_page(inode, inode->i_size, 0, 0); if (ret) return ret; @@ -6788,10 +6903,11 @@ static int btrfs_truncate(struct inode *inode) * 3) fs_info->trans_block_rsv - this will have 1 items worth left for * updating the inode. */ - rsv = btrfs_alloc_block_rsv(root); + rsv = btrfs_alloc_block_rsv(root, BTRFS_BLOCK_RSV_TEMP); if (!rsv) return -ENOMEM; rsv->size = min_size; + rsv->failfast = 1; /* * 1 for the truncate slack space @@ -6837,36 +6953,21 @@ static int btrfs_truncate(struct inode *inode) &BTRFS_I(inode)->runtime_flags)) btrfs_add_ordered_operation(trans, root, inode); - while (1) { - ret = btrfs_block_rsv_refill(root, rsv, min_size); - if (ret) { - /* - * This can only happen with the original transaction we - * started above, every other time we shouldn't have a - * transaction started yet. - */ - if (ret == -EAGAIN) - goto end_trans; - err = ret; - break; - } - - if (!trans) { - /* Just need the 1 for updating the inode */ - trans = btrfs_start_transaction(root, 1); - if (IS_ERR(trans)) { - ret = err = PTR_ERR(trans); - trans = NULL; - break; - } - } - - trans->block_rsv = rsv; + /* + * So if we truncate and then write and fsync we normally would just + * write the extents that changed, which is a problem if we need to + * first truncate that entire inode. So set this flag so we write out + * all of the extents in the inode to the sync log so we're completely + * safe. + */ + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags); + trans->block_rsv = rsv; + while (1) { ret = btrfs_truncate_inode_items(trans, root, inode, inode->i_size, BTRFS_EXTENT_DATA_KEY); - if (ret != -EAGAIN) { + if (ret != -ENOSPC) { err = ret; break; } @@ -6877,11 +6978,22 @@ static int btrfs_truncate(struct inode *inode) err = ret; break; } -end_trans: + nr = trans->blocks_used; btrfs_end_transaction(trans, root); - trans = NULL; btrfs_btree_balance_dirty(root, nr); + + trans = btrfs_start_transaction(root, 2); + if (IS_ERR(trans)) { + ret = err = PTR_ERR(trans); + trans = NULL; + break; + } + + ret = btrfs_block_rsv_migrate(&root->fs_info->trans_block_rsv, + rsv, min_size); + BUG_ON(ret); /* shouldn't happen */ + trans->block_rsv = rsv; } if (ret == 0 && inode->i_nlink > 0) { @@ -6965,6 +7077,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) ei->csum_bytes = 0; ei->index_cnt = (u64)-1; ei->last_unlink_trans = 0; + ei->last_log_commit = 0; spin_lock_init(&ei->lock); ei->outstanding_extents = 0; @@ -7095,31 +7208,31 @@ void btrfs_destroy_cachep(void) int btrfs_init_cachep(void) { - btrfs_inode_cachep = kmem_cache_create("btrfs_inode_cache", + btrfs_inode_cachep = kmem_cache_create("btrfs_inode", sizeof(struct btrfs_inode), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, init_once); if (!btrfs_inode_cachep) goto fail; - btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle_cache", + btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle", sizeof(struct btrfs_trans_handle), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!btrfs_trans_handle_cachep) goto fail; - btrfs_transaction_cachep = kmem_cache_create("btrfs_transaction_cache", + btrfs_transaction_cachep = kmem_cache_create("btrfs_transaction", sizeof(struct btrfs_transaction), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!btrfs_transaction_cachep) goto fail; - btrfs_path_cachep = kmem_cache_create("btrfs_path_cache", + btrfs_path_cachep = kmem_cache_create("btrfs_path", sizeof(struct btrfs_path), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!btrfs_path_cachep) goto fail; - btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space_cache", + btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space", sizeof(struct btrfs_free_space), 0, SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL); if (!btrfs_free_space_cachep) @@ -7513,6 +7626,8 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, loff_t actual_len, u64 *alloc_hint, struct btrfs_trans_handle *trans) { + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct extent_map *em; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_key ins; u64 cur_offset = start; @@ -7553,6 +7668,37 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, btrfs_drop_extent_cache(inode, cur_offset, cur_offset + ins.offset -1, 0); + em = alloc_extent_map(); + if (!em) { + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags); + goto next; + } + + em->start = cur_offset; + em->orig_start = cur_offset; + em->len = ins.offset; + em->block_start = ins.objectid; + em->block_len = ins.offset; + em->bdev = root->fs_info->fs_devices->latest_bdev; + set_bit(EXTENT_FLAG_PREALLOC, &em->flags); + em->generation = trans->transid; + + while (1) { + write_lock(&em_tree->lock); + ret = add_extent_mapping(em_tree, em); + if (!ret) + list_move(&em->list, + &em_tree->modified_extents); + write_unlock(&em_tree->lock); + if (ret != -EEXIST) + break; + btrfs_drop_extent_cache(inode, cur_offset, + cur_offset + ins.offset - 1, + 0); + } + free_extent_map(em); +next: num_bytes -= ins.offset; cur_offset += ins.offset; *alloc_hint = ins.objectid + ins.offset; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 47127c1bd290..e568c472f807 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -181,6 +181,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) int ret; u64 ip_oldflags; unsigned int i_oldflags; + umode_t mode; if (btrfs_root_readonly(root)) return -EROFS; @@ -203,6 +204,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) ip_oldflags = ip->flags; i_oldflags = inode->i_flags; + mode = inode->i_mode; flags = btrfs_mask_flags(inode->i_mode, flags); oldflags = btrfs_flags_to_ioctl(ip->flags); @@ -237,10 +239,31 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) ip->flags |= BTRFS_INODE_DIRSYNC; else ip->flags &= ~BTRFS_INODE_DIRSYNC; - if (flags & FS_NOCOW_FL) - ip->flags |= BTRFS_INODE_NODATACOW; - else - ip->flags &= ~BTRFS_INODE_NODATACOW; + if (flags & FS_NOCOW_FL) { + if (S_ISREG(mode)) { + /* + * It's safe to turn csums off here, no extents exist. + * Otherwise we want the flag to reflect the real COW + * status of the file and will not set it. + */ + if (inode->i_size == 0) + ip->flags |= BTRFS_INODE_NODATACOW + | BTRFS_INODE_NODATASUM; + } else { + ip->flags |= BTRFS_INODE_NODATACOW; + } + } else { + /* + * Revert back under same assuptions as above + */ + if (S_ISREG(mode)) { + if (inode->i_size == 0) + ip->flags &= ~(BTRFS_INODE_NODATACOW + | BTRFS_INODE_NODATASUM); + } else { + ip->flags &= ~BTRFS_INODE_NODATACOW; + } + } /* * The COMPRESS flag can only be changed by users, while the NOCOMPRESS @@ -516,7 +539,8 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, if (!pending_snapshot) return -ENOMEM; - btrfs_init_block_rsv(&pending_snapshot->block_rsv); + btrfs_init_block_rsv(&pending_snapshot->block_rsv, + BTRFS_BLOCK_RSV_TEMP); pending_snapshot->dentry = dentry; pending_snapshot->root = root; pending_snapshot->readonly = readonly; @@ -525,7 +549,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, *inherit = NULL; /* take responsibility to free it */ } - trans = btrfs_start_transaction(root->fs_info->extent_root, 5); + trans = btrfs_start_transaction(root->fs_info->extent_root, 6); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto fail; @@ -1022,8 +1046,8 @@ again: page_start, page_end - 1, 0, &cached_state); clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC | - EXTENT_DO_ACCOUNTING, 0, 0, &cached_state, - GFP_NOFS); + EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, + &cached_state, GFP_NOFS); if (i_done != page_cnt) { spin_lock(&BTRFS_I(inode)->lock); @@ -1034,8 +1058,8 @@ again: } - btrfs_set_extent_delalloc(inode, page_start, page_end - 1, - &cached_state); + set_extent_defrag(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, + &cached_state, GFP_NOFS); unlock_extent_cached(&BTRFS_I(inode)->io_tree, page_start, page_end - 1, &cached_state, @@ -2351,7 +2375,6 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, int ret; u64 len = olen; u64 bs = root->fs_info->sb->s_blocksize; - u64 hint_byte; /* * TODO: @@ -2456,13 +2479,13 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, another, and lock file content */ while (1) { struct btrfs_ordered_extent *ordered; - lock_extent(&BTRFS_I(src)->io_tree, off, off+len); - ordered = btrfs_lookup_first_ordered_extent(src, off+len); + lock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1); + ordered = btrfs_lookup_first_ordered_extent(src, off + len - 1); if (!ordered && - !test_range_bit(&BTRFS_I(src)->io_tree, off, off+len, - EXTENT_DELALLOC, 0, NULL)) + !test_range_bit(&BTRFS_I(src)->io_tree, off, off + len - 1, + EXTENT_DELALLOC, 0, NULL)) break; - unlock_extent(&BTRFS_I(src)->io_tree, off, off+len); + unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1); if (ordered) btrfs_put_ordered_extent(ordered); btrfs_wait_ordered_range(src, off, len); @@ -2536,7 +2559,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, btrfs_release_path(path); if (key.offset + datal <= off || - key.offset >= off+len) + key.offset >= off + len - 1) goto next; memcpy(&new_key, &key, sizeof(new_key)); @@ -2574,10 +2597,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, datal -= off - key.offset; } - ret = btrfs_drop_extents(trans, inode, + ret = btrfs_drop_extents(trans, root, inode, new_key.offset, new_key.offset + datal, - &hint_byte, 1); + 1); if (ret) { btrfs_abort_transaction(trans, root, ret); @@ -2637,8 +2660,8 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, new_key.offset += skip; } - if (key.offset + datal > off+len) - trim = key.offset + datal - (off+len); + if (key.offset + datal > off + len) + trim = key.offset + datal - (off + len); if (comp && (skip || trim)) { ret = -EINVAL; @@ -2648,10 +2671,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, size -= skip + trim; datal -= skip + trim; - ret = btrfs_drop_extents(trans, inode, + ret = btrfs_drop_extents(trans, root, inode, new_key.offset, new_key.offset + datal, - &hint_byte, 1); + 1); if (ret) { btrfs_abort_transaction(trans, root, ret); @@ -2715,7 +2738,7 @@ next: ret = 0; out: btrfs_release_path(path); - unlock_extent(&BTRFS_I(src)->io_tree, off, off+len); + unlock_extent(&BTRFS_I(src)->io_tree, off, off + len - 1); out_unlock: mutex_unlock(&src->i_mutex); mutex_unlock(&inode->i_mutex); @@ -2850,8 +2873,8 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) return 0; } -static void get_block_group_info(struct list_head *groups_list, - struct btrfs_ioctl_space_info *space) +void btrfs_get_block_group_info(struct list_head *groups_list, + struct btrfs_ioctl_space_info *space) { struct btrfs_block_group_cache *block_group; @@ -2959,8 +2982,8 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) down_read(&info->groups_sem); for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { if (!list_empty(&info->block_groups[c])) { - get_block_group_info(&info->block_groups[c], - &space); + btrfs_get_block_group_info( + &info->block_groups[c], &space); memcpy(dest, &space, sizeof(space)); dest++; space_args.total_spaces++; @@ -3208,11 +3231,9 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, { int ret = 0; int size; - u64 extent_item_pos; struct btrfs_ioctl_logical_ino_args *loi; struct btrfs_data_container *inodes = NULL; struct btrfs_path *path = NULL; - struct btrfs_key key; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -3230,7 +3251,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, goto out; } - size = min_t(u32, loi->size, 4096); + size = min_t(u32, loi->size, 64 * 1024); inodes = init_data_container(size); if (IS_ERR(inodes)) { ret = PTR_ERR(inodes); @@ -3238,22 +3259,13 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, goto out; } - ret = extent_from_logical(root->fs_info, loi->logical, path, &key); - btrfs_release_path(path); - - if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) + ret = iterate_inodes_from_logical(loi->logical, root->fs_info, path, + build_ino_list, inodes); + if (ret == -EINVAL) ret = -ENOENT; if (ret < 0) goto out; - extent_item_pos = loi->logical - key.objectid; - ret = iterate_extent_inodes(root->fs_info, key.objectid, - extent_item_pos, 0, build_ino_list, - inodes); - - if (ret < 0) - goto out; - ret = copy_to_user((void *)(unsigned long)loi->inodes, (void *)(unsigned long)inodes, size); if (ret) @@ -3261,7 +3273,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, out: btrfs_free_path(path); - kfree(inodes); + vfree(inodes); kfree(loi); return ret; diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 051c7fe551dd..7772f02ba28e 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -25,6 +25,8 @@ #include "btrfs_inode.h" #include "extent_io.h" +static struct kmem_cache *btrfs_ordered_extent_cache; + static u64 entry_end(struct btrfs_ordered_extent *entry) { if (entry->file_offset + entry->len < entry->file_offset) @@ -187,7 +189,7 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, struct btrfs_ordered_extent *entry; tree = &BTRFS_I(inode)->ordered_tree; - entry = kzalloc(sizeof(*entry), GFP_NOFS); + entry = kmem_cache_zalloc(btrfs_ordered_extent_cache, GFP_NOFS); if (!entry) return -ENOMEM; @@ -421,7 +423,7 @@ void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry) list_del(&sum->list); kfree(sum); } - kfree(entry); + kmem_cache_free(btrfs_ordered_extent_cache, entry); } } @@ -466,8 +468,7 @@ void btrfs_remove_ordered_extent(struct inode *inode, * wait for all the ordered extents in a root. This is done when balancing * space between drives. */ -void btrfs_wait_ordered_extents(struct btrfs_root *root, - int nocow_only, int delay_iput) +void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput) { struct list_head splice; struct list_head *cur; @@ -482,15 +483,6 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, cur = splice.next; ordered = list_entry(cur, struct btrfs_ordered_extent, root_extent_list); - if (nocow_only && - !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) && - !test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) { - list_move(&ordered->root_extent_list, - &root->fs_info->ordered_extents); - cond_resched_lock(&root->fs_info->ordered_extent_lock); - continue; - } - list_del_init(&ordered->root_extent_list); atomic_inc(&ordered->refs); @@ -775,7 +767,6 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree; u64 disk_i_size; u64 new_i_size; - u64 i_size_test; u64 i_size = i_size_read(inode); struct rb_node *node; struct rb_node *prev = NULL; @@ -835,55 +826,30 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, break; if (test->file_offset >= i_size) break; - if (test->file_offset >= disk_i_size) + if (test->file_offset >= disk_i_size) { + /* + * we don't update disk_i_size now, so record this + * undealt i_size. Or we will not know the real + * i_size. + */ + if (test->outstanding_isize < offset) + test->outstanding_isize = offset; + if (ordered && + ordered->outstanding_isize > + test->outstanding_isize) + test->outstanding_isize = + ordered->outstanding_isize; goto out; - } - new_i_size = min_t(u64, offset, i_size); - - /* - * at this point, we know we can safely update i_size to at least - * the offset from this ordered extent. But, we need to - * walk forward and see if ios from higher up in the file have - * finished. - */ - if (ordered) { - node = rb_next(&ordered->rb_node); - } else { - if (prev) - node = rb_next(prev); - else - node = rb_first(&tree->tree); - } - - /* - * We are looking for an area between our current extent and the next - * ordered extent to update the i_size to. There are 3 cases here - * - * 1) We don't actually have anything and we can update to i_size. - * 2) We have stuff but they already did their i_size update so again we - * can just update to i_size. - * 3) We have an outstanding ordered extent so the most we can update - * our disk_i_size to is the start of the next offset. - */ - i_size_test = i_size; - for (; node; node = rb_next(node)) { - test = rb_entry(node, struct btrfs_ordered_extent, rb_node); - - if (test_bit(BTRFS_ORDERED_UPDATED_ISIZE, &test->flags)) - continue; - if (test->file_offset > offset) { - i_size_test = test->file_offset; - break; } } + new_i_size = min_t(u64, offset, i_size); /* - * i_size_test is the end of a region after this ordered - * extent where there are no ordered extents, we can safely set - * disk_i_size to this. + * Some ordered extents may completed before the current one, and + * we hold the real i_size in ->outstanding_isize. */ - if (i_size_test > offset) - new_i_size = min_t(u64, i_size_test, i_size); + if (ordered && ordered->outstanding_isize > new_i_size) + new_i_size = min_t(u64, ordered->outstanding_isize, i_size); BTRFS_I(inode)->disk_i_size = new_i_size; ret = 0; out: @@ -984,3 +950,20 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, } spin_unlock(&root->fs_info->ordered_extent_lock); } + +int __init ordered_data_init(void) +{ + btrfs_ordered_extent_cache = kmem_cache_create("btrfs_ordered_extent", + sizeof(struct btrfs_ordered_extent), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, + NULL); + if (!btrfs_ordered_extent_cache) + return -ENOMEM; + return 0; +} + +void ordered_data_exit(void) +{ + if (btrfs_ordered_extent_cache) + kmem_cache_destroy(btrfs_ordered_extent_cache); +} diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index e03c560d2997..dd27a0b46a37 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -96,6 +96,13 @@ struct btrfs_ordered_extent { /* number of bytes that still need writing */ u64 bytes_left; + /* + * the end of the ordered extent which is behind it but + * didn't update disk_i_size. Please see the comment of + * btrfs_ordered_update_i_size(); + */ + u64 outstanding_isize; + /* flags (described above) */ unsigned long flags; @@ -183,6 +190,7 @@ void btrfs_run_ordered_operations(struct btrfs_root *root, int wait); void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode); -void btrfs_wait_ordered_extents(struct btrfs_root *root, - int nocow_only, int delay_iput); +void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput); +int __init ordered_data_init(void); +void ordered_data_exit(void); #endif diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index b65015581744..5039686df6ae 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1145,12 +1145,12 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, ulist_reinit(tmp); /* XXX id not needed */ - ulist_add(tmp, qg->qgroupid, (unsigned long)qg, GFP_ATOMIC); + ulist_add(tmp, qg->qgroupid, (u64)(uintptr_t)qg, GFP_ATOMIC); ULIST_ITER_INIT(&tmp_uiter); while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { struct btrfs_qgroup_list *glist; - qg = (struct btrfs_qgroup *)tmp_unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; if (qg->refcnt < seq) qg->refcnt = seq + 1; else @@ -1158,7 +1158,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, list_for_each_entry(glist, &qg->groups, next_group) { ulist_add(tmp, glist->group->qgroupid, - (unsigned long)glist->group, + (u64)(uintptr_t)glist->group, GFP_ATOMIC); } } @@ -1168,13 +1168,13 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, * step 2: walk from the new root */ ulist_reinit(tmp); - ulist_add(tmp, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC); + ulist_add(tmp, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); ULIST_ITER_INIT(&uiter); while ((unode = ulist_next(tmp, &uiter))) { struct btrfs_qgroup *qg; struct btrfs_qgroup_list *glist; - qg = (struct btrfs_qgroup *)unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; if (qg->refcnt < seq) { /* not visited by step 1 */ qg->rfer += sgn * node->num_bytes; @@ -1190,7 +1190,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, list_for_each_entry(glist, &qg->groups, next_group) { ulist_add(tmp, glist->group->qgroupid, - (unsigned long)glist->group, GFP_ATOMIC); + (uintptr_t)glist->group, GFP_ATOMIC); } } @@ -1208,12 +1208,12 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, continue; ulist_reinit(tmp); - ulist_add(tmp, qg->qgroupid, (unsigned long)qg, GFP_ATOMIC); + ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, GFP_ATOMIC); ULIST_ITER_INIT(&tmp_uiter); while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { struct btrfs_qgroup_list *glist; - qg = (struct btrfs_qgroup *)tmp_unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; if (qg->tag == seq) continue; @@ -1225,7 +1225,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, list_for_each_entry(glist, &qg->groups, next_group) { ulist_add(tmp, glist->group->qgroupid, - (unsigned long)glist->group, + (uintptr_t)glist->group, GFP_ATOMIC); } } @@ -1469,13 +1469,17 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) * be exceeded */ ulist = ulist_alloc(GFP_ATOMIC); - ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC); + if (!ulist) { + ret = -ENOMEM; + goto out; + } + ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); ULIST_ITER_INIT(&uiter); while ((unode = ulist_next(ulist, &uiter))) { struct btrfs_qgroup *qg; struct btrfs_qgroup_list *glist; - qg = (struct btrfs_qgroup *)unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && qg->reserved + qg->rfer + num_bytes > @@ -1489,7 +1493,7 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) list_for_each_entry(glist, &qg->groups, next_group) { ulist_add(ulist, glist->group->qgroupid, - (unsigned long)glist->group, GFP_ATOMIC); + (uintptr_t)glist->group, GFP_ATOMIC); } } if (ret) @@ -1502,7 +1506,7 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) while ((unode = ulist_next(ulist, &uiter))) { struct btrfs_qgroup *qg; - qg = (struct btrfs_qgroup *)unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; qg->reserved += num_bytes; } @@ -1541,19 +1545,23 @@ void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes) goto out; ulist = ulist_alloc(GFP_ATOMIC); - ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC); + if (!ulist) { + btrfs_std_error(fs_info, -ENOMEM); + goto out; + } + ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); ULIST_ITER_INIT(&uiter); while ((unode = ulist_next(ulist, &uiter))) { struct btrfs_qgroup *qg; struct btrfs_qgroup_list *glist; - qg = (struct btrfs_qgroup *)unode->aux; + qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; qg->reserved -= num_bytes; list_for_each_entry(glist, &qg->groups, next_group) { ulist_add(ulist, glist->group->qgroupid, - (unsigned long)glist->group, GFP_ATOMIC); + (uintptr_t)glist->group, GFP_ATOMIC); } } diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 4da08652004d..776f0aa128fc 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3270,8 +3270,8 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info, key.offset = 0; inode = btrfs_iget(fs_info->sb, &key, root, NULL); - if (IS_ERR_OR_NULL(inode) || is_bad_inode(inode)) { - if (inode && !IS_ERR(inode)) + if (IS_ERR(inode) || is_bad_inode(inode)) { + if (!IS_ERR(inode)) iput(inode); return -ENOENT; } @@ -3621,7 +3621,7 @@ next: ret = find_first_extent_bit(&rc->processed_blocks, key.objectid, &start, &end, - EXTENT_DIRTY); + EXTENT_DIRTY, NULL); if (ret == 0 && start <= key.objectid) { btrfs_release_path(path); @@ -3674,7 +3674,8 @@ int prepare_to_relocate(struct reloc_control *rc) struct btrfs_trans_handle *trans; int ret; - rc->block_rsv = btrfs_alloc_block_rsv(rc->extent_root); + rc->block_rsv = btrfs_alloc_block_rsv(rc->extent_root, + BTRFS_BLOCK_RSV_TEMP); if (!rc->block_rsv) return -ENOMEM; @@ -4057,7 +4058,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) (unsigned long long)rc->block_group->flags); btrfs_start_delalloc_inodes(fs_info->tree_root, 0); - btrfs_wait_ordered_extents(fs_info->tree_root, 0, 0); + btrfs_wait_ordered_extents(fs_info->tree_root, 0); while (1) { mutex_lock(&fs_info->cleaner_mutex); diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 10d8e4d88071..eb923d087da7 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -141,8 +141,10 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root return -ENOMEM; ret = btrfs_search_slot(trans, root, key, path, 0, 1); - if (ret < 0) - goto out_abort; + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } if (ret != 0) { btrfs_print_leaf(root, path->nodes[0]); @@ -166,16 +168,23 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_release_path(path); ret = btrfs_search_slot(trans, root, key, path, -1, 1); - if (ret < 0) - goto out_abort; + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } + ret = btrfs_del_item(trans, root, path); - if (ret < 0) - goto out_abort; + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } btrfs_release_path(path); ret = btrfs_insert_empty_item(trans, root, path, key, sizeof(*item)); - if (ret < 0) - goto out_abort; + if (ret < 0) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } l = path->nodes[0]; slot = path->slots[0]; ptr = btrfs_item_ptr_offset(l, slot); @@ -192,10 +201,6 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root out: btrfs_free_path(path); return ret; - -out_abort: - btrfs_abort_transaction(trans, root, ret); - goto out; } int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index b223620cd5a6..27892f67e69b 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -352,13 +352,14 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) struct extent_buffer *eb; struct btrfs_extent_item *ei; struct scrub_warning swarn; - u32 item_size; - int ret; + unsigned long ptr = 0; + u64 extent_item_pos; + u64 flags = 0; u64 ref_root; + u32 item_size; u8 ref_level; - unsigned long ptr = 0; const int bufsize = 4096; - u64 extent_item_pos; + int ret; path = btrfs_alloc_path(); @@ -375,7 +376,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) if (!path || !swarn.scratch_buf || !swarn.msg_buf) goto out; - ret = extent_from_logical(fs_info, swarn.logical, path, &found_key); + ret = extent_from_logical(fs_info, swarn.logical, path, &found_key, + &flags); if (ret < 0) goto out; @@ -387,7 +389,7 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) item_size = btrfs_item_size_nr(eb, path->slots[0]); btrfs_release_path(path); - if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) { + if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { do { ret = tree_backref_for_extent(&ptr, eb, ei, item_size, &ref_root, &ref_level); @@ -1029,6 +1031,7 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev, spin_lock(&sdev->stat_lock); sdev->stat.malloc_errors++; spin_unlock(&sdev->stat_lock); + kfree(bbio); return -ENOMEM; } sblock->page_count++; @@ -1666,21 +1669,6 @@ static void scrub_bio_end_io_worker(struct btrfs_work *work) scrub_block_put(sblock); } - if (sbio->err) { - /* what is this good for??? */ - sbio->bio->bi_flags &= ~(BIO_POOL_MASK - 1); - sbio->bio->bi_flags |= 1 << BIO_UPTODATE; - sbio->bio->bi_phys_segments = 0; - sbio->bio->bi_idx = 0; - - for (i = 0; i < sbio->page_count; i++) { - struct bio_vec *bi; - bi = &sbio->bio->bi_io_vec[i]; - bi->bv_offset = 0; - bi->bv_len = PAGE_SIZE; - } - } - bio_put(sbio->bio); sbio->bio = NULL; spin_lock(&sdev->list_lock); diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index fb5ffe95f869..c7beb543a4a8 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -107,7 +107,6 @@ struct send_ctx { int cur_inode_new; int cur_inode_new_gen; int cur_inode_deleted; - int cur_inode_first_ref_orphan; u64 cur_inode_size; u64 cur_inode_mode; @@ -126,7 +125,15 @@ struct send_ctx { struct name_cache_entry { struct list_head list; - struct list_head use_list; + /* + * radix_tree has only 32bit entries but we need to handle 64bit inums. + * We use the lower 32bit of the 64bit inum to store it in the tree. If + * more then one inum would fall into the same entry, we use radix_list + * to store the additional entries. radix_list is also used to store + * entries where two entries have the same inum but different + * generations. + */ + struct list_head radix_list; u64 ino; u64 gen; u64 parent_ino; @@ -328,6 +335,7 @@ out: return ret; } +#if 0 static void fs_path_remove(struct fs_path *p) { BUG_ON(p->reversed); @@ -335,6 +343,7 @@ static void fs_path_remove(struct fs_path *p) p->end--; *p->end = 0; } +#endif static int fs_path_copy(struct fs_path *p, struct fs_path *from) { @@ -377,7 +386,7 @@ static struct btrfs_path *alloc_path_for_send(void) return path; } -static int write_buf(struct send_ctx *sctx, const void *buf, u32 len) +int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off) { int ret; mm_segment_t old_fs; @@ -387,8 +396,7 @@ static int write_buf(struct send_ctx *sctx, const void *buf, u32 len) set_fs(KERNEL_DS); while (pos < len) { - ret = vfs_write(sctx->send_filp, (char *)buf + pos, len - pos, - &sctx->send_off); + ret = vfs_write(filp, (char *)buf + pos, len - pos, off); /* TODO handle that correctly */ /*if (ret == -ERESTARTSYS) { continue; @@ -544,7 +552,8 @@ static int send_header(struct send_ctx *sctx) strcpy(hdr.magic, BTRFS_SEND_STREAM_MAGIC); hdr.version = cpu_to_le32(BTRFS_SEND_STREAM_VERSION); - return write_buf(sctx, &hdr, sizeof(hdr)); + return write_buf(sctx->send_filp, &hdr, sizeof(hdr), + &sctx->send_off); } /* @@ -581,7 +590,8 @@ static int send_cmd(struct send_ctx *sctx) crc = crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size); hdr->crc = cpu_to_le32(crc); - ret = write_buf(sctx, sctx->send_buf, sctx->send_size); + ret = write_buf(sctx->send_filp, sctx->send_buf, sctx->send_size, + &sctx->send_off); sctx->total_send_size += sctx->send_size; sctx->cmd_send_size[le16_to_cpu(hdr->cmd)] += sctx->send_size; @@ -687,7 +697,8 @@ out: */ static int get_inode_info(struct btrfs_root *root, u64 ino, u64 *size, u64 *gen, - u64 *mode, u64 *uid, u64 *gid) + u64 *mode, u64 *uid, u64 *gid, + u64 *rdev) { int ret; struct btrfs_inode_item *ii; @@ -721,6 +732,8 @@ static int get_inode_info(struct btrfs_root *root, *uid = btrfs_inode_uid(path->nodes[0], ii); if (gid) *gid = btrfs_inode_gid(path->nodes[0], ii); + if (rdev) + *rdev = btrfs_inode_rdev(path->nodes[0], ii); out: btrfs_free_path(path); @@ -852,7 +865,6 @@ static int iterate_dir_item(struct send_ctx *sctx, struct extent_buffer *eb; struct btrfs_item *item; struct btrfs_dir_item *di; - struct btrfs_path *tmp_path = NULL; struct btrfs_key di_key; char *buf = NULL; char *buf2 = NULL; @@ -874,12 +886,6 @@ static int iterate_dir_item(struct send_ctx *sctx, goto out; } - tmp_path = alloc_path_for_send(); - if (!tmp_path) { - ret = -ENOMEM; - goto out; - } - eb = path->nodes[0]; slot = path->slots[0]; item = btrfs_item_nr(eb, slot); @@ -941,7 +947,6 @@ static int iterate_dir_item(struct send_ctx *sctx, } out: - btrfs_free_path(tmp_path); if (buf_virtual) vfree(buf); else @@ -1026,12 +1031,12 @@ struct backref_ctx { u64 extent_len; /* Just to check for bugs in backref resolving */ - int found_in_send_root; + int found_itself; }; static int __clone_root_cmp_bsearch(const void *key, const void *elt) { - u64 root = (u64)key; + u64 root = (u64)(uintptr_t)key; struct clone_root *cr = (struct clone_root *)elt; if (root < cr->root->objectid) @@ -1055,6 +1060,7 @@ static int __clone_root_cmp_sort(const void *e1, const void *e2) /* * Called for every backref that is found for the current extent. + * Results are collected in sctx->clone_roots->ino/offset/found_refs */ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_) { @@ -1064,7 +1070,7 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_) u64 i_size; /* First check if the root is in the list of accepted clone sources */ - found = bsearch((void *)root, bctx->sctx->clone_roots, + found = bsearch((void *)(uintptr_t)root, bctx->sctx->clone_roots, bctx->sctx->clone_roots_cnt, sizeof(struct clone_root), __clone_root_cmp_bsearch); @@ -1074,14 +1080,15 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_) if (found->root == bctx->sctx->send_root && ino == bctx->cur_objectid && offset == bctx->cur_offset) { - bctx->found_in_send_root = 1; + bctx->found_itself = 1; } /* - * There are inodes that have extents that lie behind it's i_size. Don't + * There are inodes that have extents that lie behind its i_size. Don't * accept clones from these extents. */ - ret = get_inode_info(found->root, ino, &i_size, NULL, NULL, NULL, NULL); + ret = get_inode_info(found->root, ino, &i_size, NULL, NULL, NULL, NULL, + NULL); if (ret < 0) return ret; @@ -1101,16 +1108,12 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_) */ if (ino >= bctx->cur_objectid) return 0; - /*if (ino > ctx->cur_objectid) +#if 0 + if (ino > bctx->cur_objectid) return 0; - if (offset + ctx->extent_len > ctx->cur_offset) - return 0;*/ - - bctx->found++; - found->found_refs++; - found->ino = ino; - found->offset = offset; - return 0; + if (offset + bctx->extent_len > bctx->cur_offset) + return 0; +#endif } bctx->found++; @@ -1130,6 +1133,12 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_) } /* + * Given an inode, offset and extent item, it finds a good clone for a clone + * instruction. Returns -ENOENT when none could be found. The function makes + * sure that the returned clone is usable at the point where sending is at the + * moment. This means, that no clones are accepted which lie behind the current + * inode+offset. + * * path must point to the extent item when called. */ static int find_extent_clone(struct send_ctx *sctx, @@ -1141,20 +1150,29 @@ static int find_extent_clone(struct send_ctx *sctx, int ret; int extent_type; u64 logical; + u64 disk_byte; u64 num_bytes; u64 extent_item_pos; + u64 flags = 0; struct btrfs_file_extent_item *fi; struct extent_buffer *eb = path->nodes[0]; - struct backref_ctx backref_ctx; + struct backref_ctx *backref_ctx = NULL; struct clone_root *cur_clone_root; struct btrfs_key found_key; struct btrfs_path *tmp_path; + int compressed; u32 i; tmp_path = alloc_path_for_send(); if (!tmp_path) return -ENOMEM; + backref_ctx = kmalloc(sizeof(*backref_ctx), GFP_NOFS); + if (!backref_ctx) { + ret = -ENOMEM; + goto out; + } + if (data_offset >= ino_size) { /* * There may be extents that lie behind the file's size. @@ -1172,22 +1190,23 @@ static int find_extent_clone(struct send_ctx *sctx, ret = -ENOENT; goto out; } + compressed = btrfs_file_extent_compression(eb, fi); num_bytes = btrfs_file_extent_num_bytes(eb, fi); - logical = btrfs_file_extent_disk_bytenr(eb, fi); - if (logical == 0) { + disk_byte = btrfs_file_extent_disk_bytenr(eb, fi); + if (disk_byte == 0) { ret = -ENOENT; goto out; } - logical += btrfs_file_extent_offset(eb, fi); + logical = disk_byte + btrfs_file_extent_offset(eb, fi); - ret = extent_from_logical(sctx->send_root->fs_info, - logical, tmp_path, &found_key); + ret = extent_from_logical(sctx->send_root->fs_info, disk_byte, tmp_path, + &found_key, &flags); btrfs_release_path(tmp_path); if (ret < 0) goto out; - if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK) { + if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { ret = -EIO; goto out; } @@ -1202,12 +1221,12 @@ static int find_extent_clone(struct send_ctx *sctx, cur_clone_root->found_refs = 0; } - backref_ctx.sctx = sctx; - backref_ctx.found = 0; - backref_ctx.cur_objectid = ino; - backref_ctx.cur_offset = data_offset; - backref_ctx.found_in_send_root = 0; - backref_ctx.extent_len = num_bytes; + backref_ctx->sctx = sctx; + backref_ctx->found = 0; + backref_ctx->cur_objectid = ino; + backref_ctx->cur_offset = data_offset; + backref_ctx->found_itself = 0; + backref_ctx->extent_len = num_bytes; /* * The last extent of a file may be too large due to page alignment. @@ -1215,25 +1234,31 @@ static int find_extent_clone(struct send_ctx *sctx, * __iterate_backrefs work. */ if (data_offset + num_bytes >= ino_size) - backref_ctx.extent_len = ino_size - data_offset; + backref_ctx->extent_len = ino_size - data_offset; /* * Now collect all backrefs. */ + if (compressed == BTRFS_COMPRESS_NONE) + extent_item_pos = logical - found_key.objectid; + else + extent_item_pos = 0; + extent_item_pos = logical - found_key.objectid; ret = iterate_extent_inodes(sctx->send_root->fs_info, found_key.objectid, extent_item_pos, 1, - __iterate_backrefs, &backref_ctx); + __iterate_backrefs, backref_ctx); + if (ret < 0) goto out; - if (!backref_ctx.found_in_send_root) { + if (!backref_ctx->found_itself) { /* found a bug in backref code? */ ret = -EIO; printk(KERN_ERR "btrfs: ERROR did not find backref in " "send_root. inode=%llu, offset=%llu, " - "logical=%llu\n", - ino, data_offset, logical); + "disk_byte=%llu found extent=%llu\n", + ino, data_offset, disk_byte, found_key.objectid); goto out; } @@ -1242,7 +1267,7 @@ verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, " "num_bytes=%llu, logical=%llu\n", data_offset, ino, num_bytes, logical); - if (!backref_ctx.found) + if (!backref_ctx->found) verbose_printk("btrfs: no clones found\n"); cur_clone_root = NULL; @@ -1253,7 +1278,6 @@ verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, " else if (sctx->clone_roots[i].root == sctx->send_root) /* prefer clones from send_root over others */ cur_clone_root = sctx->clone_roots + i; - break; } } @@ -1267,6 +1291,7 @@ verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, " out: btrfs_free_path(tmp_path); + kfree(backref_ctx); return ret; } @@ -1307,8 +1332,6 @@ static int read_symlink(struct send_ctx *sctx, len = btrfs_file_extent_inline_len(path->nodes[0], ei); ret = fs_path_add_from_extent_buffer(dest, path->nodes[0], off, len); - if (ret < 0) - goto out; out: btrfs_free_path(path); @@ -1404,7 +1427,7 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen) u64 right_gen; ret = get_inode_info(sctx->send_root, ino, NULL, &left_gen, NULL, NULL, - NULL); + NULL, NULL); if (ret < 0 && ret != -ENOENT) goto out; left_ret = ret; @@ -1413,16 +1436,16 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen) right_ret = -ENOENT; } else { ret = get_inode_info(sctx->parent_root, ino, NULL, &right_gen, - NULL, NULL, NULL); + NULL, NULL, NULL, NULL); if (ret < 0 && ret != -ENOENT) goto out; right_ret = ret; } if (!left_ret && !right_ret) { - if (left_gen == gen && right_gen == gen) + if (left_gen == gen && right_gen == gen) { ret = inode_state_no_change; - else if (left_gen == gen) { + } else if (left_gen == gen) { if (ino < sctx->send_progress) ret = inode_state_did_create; else @@ -1516,6 +1539,10 @@ out: return ret; } +/* + * Looks up the first btrfs_inode_ref of a given ino. It returns the parent dir, + * generation of the parent dir and the name of the dir entry. + */ static int get_first_ref(struct send_ctx *sctx, struct btrfs_root *root, u64 ino, u64 *dir, u64 *dir_gen, struct fs_path *name) @@ -1557,7 +1584,7 @@ static int get_first_ref(struct send_ctx *sctx, btrfs_release_path(path); ret = get_inode_info(root, found_key.offset, NULL, dir_gen, NULL, NULL, - NULL); + NULL, NULL); if (ret < 0) goto out; @@ -1586,22 +1613,28 @@ static int is_first_ref(struct send_ctx *sctx, if (ret < 0) goto out; - if (name_len != fs_path_len(tmp_name)) { + if (dir != tmp_dir || name_len != fs_path_len(tmp_name)) { ret = 0; goto out; } - ret = memcmp(tmp_name->start, name, name_len); - if (ret) - ret = 0; - else - ret = 1; + ret = !memcmp(tmp_name->start, name, name_len); out: fs_path_free(sctx, tmp_name); return ret; } +/* + * Used by process_recorded_refs to determine if a new ref would overwrite an + * already existing ref. In case it detects an overwrite, it returns the + * inode/gen in who_ino/who_gen. + * When an overwrite is detected, process_recorded_refs does proper orphanizing + * to make sure later references to the overwritten inode are possible. + * Orphanizing is however only required for the first ref of an inode. + * process_recorded_refs does an additional is_first_ref check to see if + * orphanizing is really required. + */ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, const char *name, int name_len, u64 *who_ino, u64 *who_gen) @@ -1626,9 +1659,14 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, goto out; } + /* + * Check if the overwritten ref was already processed. If yes, the ref + * was already unlinked/moved, so we can safely assume that we will not + * overwrite anything at this point in time. + */ if (other_inode > sctx->send_progress) { ret = get_inode_info(sctx->parent_root, other_inode, NULL, - who_gen, NULL, NULL, NULL); + who_gen, NULL, NULL, NULL, NULL); if (ret < 0) goto out; @@ -1642,6 +1680,13 @@ out: return ret; } +/* + * Checks if the ref was overwritten by an already processed inode. This is + * used by __get_cur_name_and_parent to find out if the ref was orphanized and + * thus the orphan name needs be used. + * process_recorded_refs also uses it to avoid unlinking of refs that were + * overwritten. + */ static int did_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, u64 ino, u64 ino_gen, @@ -1671,7 +1716,7 @@ static int did_overwrite_ref(struct send_ctx *sctx, } ret = get_inode_info(sctx->send_root, ow_inode, NULL, &gen, NULL, NULL, - NULL); + NULL, NULL); if (ret < 0) goto out; @@ -1690,6 +1735,11 @@ out: return ret; } +/* + * Same as did_overwrite_ref, but also checks if it is the first ref of an inode + * that got overwritten. This is used by process_recorded_refs to determine + * if it has to use the path as returned by get_cur_path or the orphan name. + */ static int did_overwrite_first_ref(struct send_ctx *sctx, u64 ino, u64 gen) { int ret = 0; @@ -1710,39 +1760,40 @@ static int did_overwrite_first_ref(struct send_ctx *sctx, u64 ino, u64 gen) ret = did_overwrite_ref(sctx, dir, dir_gen, ino, gen, name->start, fs_path_len(name)); - if (ret < 0) - goto out; out: fs_path_free(sctx, name); return ret; } +/* + * Insert a name cache entry. On 32bit kernels the radix tree index is 32bit, + * so we need to do some special handling in case we have clashes. This function + * takes care of this with the help of name_cache_entry::radix_list. + * In case of error, nce is kfreed. + */ static int name_cache_insert(struct send_ctx *sctx, struct name_cache_entry *nce) { int ret = 0; - struct name_cache_entry **ncea; - - ncea = radix_tree_lookup(&sctx->name_cache, nce->ino); - if (ncea) { - if (!ncea[0]) - ncea[0] = nce; - else if (!ncea[1]) - ncea[1] = nce; - else - BUG(); - } else { - ncea = kmalloc(sizeof(void *) * 2, GFP_NOFS); - if (!ncea) + struct list_head *nce_head; + + nce_head = radix_tree_lookup(&sctx->name_cache, + (unsigned long)nce->ino); + if (!nce_head) { + nce_head = kmalloc(sizeof(*nce_head), GFP_NOFS); + if (!nce_head) return -ENOMEM; + INIT_LIST_HEAD(nce_head); - ncea[0] = nce; - ncea[1] = NULL; - ret = radix_tree_insert(&sctx->name_cache, nce->ino, ncea); - if (ret < 0) + ret = radix_tree_insert(&sctx->name_cache, nce->ino, nce_head); + if (ret < 0) { + kfree(nce_head); + kfree(nce); return ret; + } } + list_add_tail(&nce->radix_list, nce_head); list_add_tail(&nce->list, &sctx->name_cache_list); sctx->name_cache_size++; @@ -1752,50 +1803,52 @@ static int name_cache_insert(struct send_ctx *sctx, static void name_cache_delete(struct send_ctx *sctx, struct name_cache_entry *nce) { - struct name_cache_entry **ncea; - - ncea = radix_tree_lookup(&sctx->name_cache, nce->ino); - BUG_ON(!ncea); - - if (ncea[0] == nce) - ncea[0] = NULL; - else if (ncea[1] == nce) - ncea[1] = NULL; - else - BUG(); + struct list_head *nce_head; - if (!ncea[0] && !ncea[1]) { - radix_tree_delete(&sctx->name_cache, nce->ino); - kfree(ncea); - } + nce_head = radix_tree_lookup(&sctx->name_cache, + (unsigned long)nce->ino); + BUG_ON(!nce_head); + list_del(&nce->radix_list); list_del(&nce->list); - sctx->name_cache_size--; + + if (list_empty(nce_head)) { + radix_tree_delete(&sctx->name_cache, (unsigned long)nce->ino); + kfree(nce_head); + } } static struct name_cache_entry *name_cache_search(struct send_ctx *sctx, u64 ino, u64 gen) { - struct name_cache_entry **ncea; + struct list_head *nce_head; + struct name_cache_entry *cur; - ncea = radix_tree_lookup(&sctx->name_cache, ino); - if (!ncea) + nce_head = radix_tree_lookup(&sctx->name_cache, (unsigned long)ino); + if (!nce_head) return NULL; - if (ncea[0] && ncea[0]->gen == gen) - return ncea[0]; - else if (ncea[1] && ncea[1]->gen == gen) - return ncea[1]; + list_for_each_entry(cur, nce_head, radix_list) { + if (cur->ino == ino && cur->gen == gen) + return cur; + } return NULL; } +/* + * Removes the entry from the list and adds it back to the end. This marks the + * entry as recently used so that name_cache_clean_unused does not remove it. + */ static void name_cache_used(struct send_ctx *sctx, struct name_cache_entry *nce) { list_del(&nce->list); list_add_tail(&nce->list, &sctx->name_cache_list); } +/* + * Remove some entries from the beginning of name_cache_list. + */ static void name_cache_clean_unused(struct send_ctx *sctx) { struct name_cache_entry *nce; @@ -1814,13 +1867,23 @@ static void name_cache_clean_unused(struct send_ctx *sctx) static void name_cache_free(struct send_ctx *sctx) { struct name_cache_entry *nce; - struct name_cache_entry *tmp; - list_for_each_entry_safe(nce, tmp, &sctx->name_cache_list, list) { + while (!list_empty(&sctx->name_cache_list)) { + nce = list_entry(sctx->name_cache_list.next, + struct name_cache_entry, list); name_cache_delete(sctx, nce); + kfree(nce); } } +/* + * Used by get_cur_path for each ref up to the root. + * Returns 0 if it succeeded. + * Returns 1 if the inode is not existent or got overwritten. In that case, the + * name is an orphan name. This instructs get_cur_path to stop iterating. If 1 + * is returned, parent_ino/parent_gen are not guaranteed to be valid. + * Returns <0 in case of error. + */ static int __get_cur_name_and_parent(struct send_ctx *sctx, u64 ino, u64 gen, u64 *parent_ino, @@ -1832,6 +1895,11 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, struct btrfs_path *path = NULL; struct name_cache_entry *nce = NULL; + /* + * First check if we already did a call to this function with the same + * ino/gen. If yes, check if the cache entry is still up-to-date. If yes + * return the cached result. + */ nce = name_cache_search(sctx, ino, gen); if (nce) { if (ino < sctx->send_progress && nce->need_later_update) { @@ -1854,6 +1922,11 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, if (!path) return -ENOMEM; + /* + * If the inode is not existent yet, add the orphan name and return 1. + * This should only happen for the parent dir that we determine in + * __record_new_ref + */ ret = is_inode_existent(sctx, ino, gen); if (ret < 0) goto out; @@ -1866,6 +1939,10 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, goto out_cache; } + /* + * Depending on whether the inode was already processed or not, use + * send_root or parent_root for ref lookup. + */ if (ino < sctx->send_progress) ret = get_first_ref(sctx, sctx->send_root, ino, parent_ino, parent_gen, dest); @@ -1875,6 +1952,10 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, if (ret < 0) goto out; + /* + * Check if the ref was overwritten by an inode's ref that was processed + * earlier. If yes, treat as orphan and return 1. + */ ret = did_overwrite_ref(sctx, *parent_ino, *parent_gen, ino, gen, dest->start, dest->end - dest->start); if (ret < 0) @@ -1888,6 +1969,9 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, } out_cache: + /* + * Store the result of the lookup in the name cache. + */ nce = kmalloc(sizeof(*nce) + fs_path_len(dest) + 1, GFP_NOFS); if (!nce) { ret = -ENOMEM; @@ -1901,7 +1985,6 @@ out_cache: nce->name_len = fs_path_len(dest); nce->ret = ret; strcpy(nce->name, dest->start); - memset(&nce->use_list, 0, sizeof(nce->use_list)); if (ino < sctx->send_progress) nce->need_later_update = 0; @@ -2107,9 +2190,6 @@ static int send_subvol_begin(struct send_ctx *sctx) read_extent_buffer(leaf, name, (unsigned long)(ref + 1), namelen); btrfs_release_path(path); - if (ret < 0) - goto out; - if (parent_root) { ret = begin_cmd(sctx, BTRFS_SEND_C_SNAPSHOT); if (ret < 0) @@ -2276,7 +2356,7 @@ verbose_printk("btrfs: send_utimes %llu\n", ino); btrfs_inode_mtime(ii)); TLV_PUT_BTRFS_TIMESPEC(sctx, BTRFS_SEND_A_CTIME, eb, btrfs_inode_ctime(ii)); - /* TODO otime? */ + /* TODO Add otime support when the otime patches get into upstream */ ret = send_cmd(sctx); @@ -2292,39 +2372,39 @@ out: * a valid path yet because we did not process the refs yet. So, the inode * is created as orphan. */ -static int send_create_inode(struct send_ctx *sctx, struct btrfs_path *path, - struct btrfs_key *key) +static int send_create_inode(struct send_ctx *sctx, u64 ino) { int ret = 0; - struct extent_buffer *eb = path->nodes[0]; - struct btrfs_inode_item *ii; struct fs_path *p; - int slot = path->slots[0]; int cmd; + u64 gen; u64 mode; + u64 rdev; -verbose_printk("btrfs: send_create_inode %llu\n", sctx->cur_ino); +verbose_printk("btrfs: send_create_inode %llu\n", ino); p = fs_path_alloc(sctx); if (!p) return -ENOMEM; - ii = btrfs_item_ptr(eb, slot, struct btrfs_inode_item); - mode = btrfs_inode_mode(eb, ii); + ret = get_inode_info(sctx->send_root, ino, NULL, &gen, &mode, NULL, + NULL, &rdev); + if (ret < 0) + goto out; - if (S_ISREG(mode)) + if (S_ISREG(mode)) { cmd = BTRFS_SEND_C_MKFILE; - else if (S_ISDIR(mode)) + } else if (S_ISDIR(mode)) { cmd = BTRFS_SEND_C_MKDIR; - else if (S_ISLNK(mode)) + } else if (S_ISLNK(mode)) { cmd = BTRFS_SEND_C_SYMLINK; - else if (S_ISCHR(mode) || S_ISBLK(mode)) + } else if (S_ISCHR(mode) || S_ISBLK(mode)) { cmd = BTRFS_SEND_C_MKNOD; - else if (S_ISFIFO(mode)) + } else if (S_ISFIFO(mode)) { cmd = BTRFS_SEND_C_MKFIFO; - else if (S_ISSOCK(mode)) + } else if (S_ISSOCK(mode)) { cmd = BTRFS_SEND_C_MKSOCK; - else { + } else { printk(KERN_WARNING "btrfs: unexpected inode type %o", (int)(mode & S_IFMT)); ret = -ENOTSUPP; @@ -2335,22 +2415,22 @@ verbose_printk("btrfs: send_create_inode %llu\n", sctx->cur_ino); if (ret < 0) goto out; - ret = gen_unique_name(sctx, sctx->cur_ino, sctx->cur_inode_gen, p); + ret = gen_unique_name(sctx, ino, gen, p); if (ret < 0) goto out; TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p); - TLV_PUT_U64(sctx, BTRFS_SEND_A_INO, sctx->cur_ino); + TLV_PUT_U64(sctx, BTRFS_SEND_A_INO, ino); if (S_ISLNK(mode)) { fs_path_reset(p); - ret = read_symlink(sctx, sctx->send_root, sctx->cur_ino, p); + ret = read_symlink(sctx, sctx->send_root, ino, p); if (ret < 0) goto out; TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH_LINK, p); } else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { - TLV_PUT_U64(sctx, BTRFS_SEND_A_RDEV, btrfs_inode_rdev(eb, ii)); + TLV_PUT_U64(sctx, BTRFS_SEND_A_RDEV, rdev); } ret = send_cmd(sctx); @@ -2364,6 +2444,92 @@ out: return ret; } +/* + * We need some special handling for inodes that get processed before the parent + * directory got created. See process_recorded_refs for details. + * This function does the check if we already created the dir out of order. + */ +static int did_create_dir(struct send_ctx *sctx, u64 dir) +{ + int ret = 0; + struct btrfs_path *path = NULL; + struct btrfs_key key; + struct btrfs_key found_key; + struct btrfs_key di_key; + struct extent_buffer *eb; + struct btrfs_dir_item *di; + int slot; + + path = alloc_path_for_send(); + if (!path) { + ret = -ENOMEM; + goto out; + } + + key.objectid = dir; + key.type = BTRFS_DIR_INDEX_KEY; + key.offset = 0; + while (1) { + ret = btrfs_search_slot_for_read(sctx->send_root, &key, path, + 1, 0); + if (ret < 0) + goto out; + if (!ret) { + eb = path->nodes[0]; + slot = path->slots[0]; + btrfs_item_key_to_cpu(eb, &found_key, slot); + } + if (ret || found_key.objectid != key.objectid || + found_key.type != key.type) { + ret = 0; + goto out; + } + + di = btrfs_item_ptr(eb, slot, struct btrfs_dir_item); + btrfs_dir_item_key_to_cpu(eb, di, &di_key); + + if (di_key.objectid < sctx->send_progress) { + ret = 1; + goto out; + } + + key.offset = found_key.offset + 1; + btrfs_release_path(path); + } + +out: + btrfs_free_path(path); + return ret; +} + +/* + * Only creates the inode if it is: + * 1. Not a directory + * 2. Or a directory which was not created already due to out of order + * directories. See did_create_dir and process_recorded_refs for details. + */ +static int send_create_inode_if_needed(struct send_ctx *sctx) +{ + int ret; + + if (S_ISDIR(sctx->cur_inode_mode)) { + ret = did_create_dir(sctx, sctx->cur_ino); + if (ret < 0) + goto out; + if (ret) { + ret = 0; + goto out; + } + } + + ret = send_create_inode(sctx, sctx->cur_ino); + if (ret < 0) + goto out; + +out: + return ret; +} + struct recorded_ref { struct list_head list; char *dir_path; @@ -2416,13 +2582,13 @@ static int record_ref(struct list_head *head, u64 dir, static void __free_recorded_refs(struct send_ctx *sctx, struct list_head *head) { struct recorded_ref *cur; - struct recorded_ref *tmp; - list_for_each_entry_safe(cur, tmp, head, list) { + while (!list_empty(head)) { + cur = list_entry(head->next, struct recorded_ref, list); fs_path_free(sctx, cur->full_path); + list_del(&cur->list); kfree(cur); } - INIT_LIST_HEAD(head); } static void free_recorded_refs(struct send_ctx *sctx) @@ -2432,7 +2598,7 @@ static void free_recorded_refs(struct send_ctx *sctx) } /* - * Renames/moves a file/dir to it's orphan name. Used when the first + * Renames/moves a file/dir to its orphan name. Used when the first * ref of an unprocessed inode gets overwritten and for all non empty * directories. */ @@ -2472,6 +2638,12 @@ static int can_rmdir(struct send_ctx *sctx, u64 dir, u64 send_progress) struct btrfs_key loc; struct btrfs_dir_item *di; + /* + * Don't try to rmdir the top/root subvolume dir. + */ + if (dir == BTRFS_FIRST_FREE_OBJECTID) + return 0; + path = alloc_path_for_send(); if (!path) return -ENOMEM; @@ -2513,160 +2685,6 @@ out: return ret; } -struct finish_unordered_dir_ctx { - struct send_ctx *sctx; - struct fs_path *cur_path; - struct fs_path *dir_path; - u64 dir_ino; - int need_delete; - int delete_pass; -}; - -int __finish_unordered_dir(int num, struct btrfs_key *di_key, - const char *name, int name_len, - const char *data, int data_len, - u8 type, void *ctx) -{ - int ret = 0; - struct finish_unordered_dir_ctx *fctx = ctx; - struct send_ctx *sctx = fctx->sctx; - u64 di_gen; - u64 di_mode; - int is_orphan = 0; - - if (di_key->objectid >= fctx->dir_ino) - goto out; - - fs_path_reset(fctx->cur_path); - - ret = get_inode_info(sctx->send_root, di_key->objectid, - NULL, &di_gen, &di_mode, NULL, NULL); - if (ret < 0) - goto out; - - ret = is_first_ref(sctx, sctx->send_root, di_key->objectid, - fctx->dir_ino, name, name_len); - if (ret < 0) - goto out; - if (ret) { - is_orphan = 1; - ret = gen_unique_name(sctx, di_key->objectid, di_gen, - fctx->cur_path); - } else { - ret = get_cur_path(sctx, di_key->objectid, di_gen, - fctx->cur_path); - } - if (ret < 0) - goto out; - - ret = fs_path_add(fctx->dir_path, name, name_len); - if (ret < 0) - goto out; - - if (!fctx->delete_pass) { - if (S_ISDIR(di_mode)) { - ret = send_rename(sctx, fctx->cur_path, - fctx->dir_path); - } else { - ret = send_link(sctx, fctx->dir_path, - fctx->cur_path); - if (is_orphan) - fctx->need_delete = 1; - } - } else if (!S_ISDIR(di_mode)) { - ret = send_unlink(sctx, fctx->cur_path); - } else { - ret = 0; - } - - fs_path_remove(fctx->dir_path); - -out: - return ret; -} - -/* - * Go through all dir items and see if we find refs which could not be created - * in the past because the dir did not exist at that time. - */ -static int finish_outoforder_dir(struct send_ctx *sctx, u64 dir, u64 dir_gen) -{ - int ret = 0; - struct btrfs_path *path = NULL; - struct btrfs_key key; - struct btrfs_key found_key; - struct extent_buffer *eb; - struct finish_unordered_dir_ctx fctx; - int slot; - - path = alloc_path_for_send(); - if (!path) { - ret = -ENOMEM; - goto out; - } - - memset(&fctx, 0, sizeof(fctx)); - fctx.sctx = sctx; - fctx.cur_path = fs_path_alloc(sctx); - fctx.dir_path = fs_path_alloc(sctx); - if (!fctx.cur_path || !fctx.dir_path) { - ret = -ENOMEM; - goto out; - } - fctx.dir_ino = dir; - - ret = get_cur_path(sctx, dir, dir_gen, fctx.dir_path); - if (ret < 0) - goto out; - - /* - * We do two passes. The first links in the new refs and the second - * deletes orphans if required. Deletion of orphans is not required for - * directory inodes, as we always have only one ref and use rename - * instead of link for those. - */ - -again: - key.objectid = dir; - key.type = BTRFS_DIR_ITEM_KEY; - key.offset = 0; - while (1) { - ret = btrfs_search_slot_for_read(sctx->send_root, &key, path, - 1, 0); - if (ret < 0) - goto out; - eb = path->nodes[0]; - slot = path->slots[0]; - btrfs_item_key_to_cpu(eb, &found_key, slot); - - if (found_key.objectid != key.objectid || - found_key.type != key.type) { - btrfs_release_path(path); - break; - } - - ret = iterate_dir_item(sctx, sctx->send_root, path, - &found_key, __finish_unordered_dir, - &fctx); - if (ret < 0) - goto out; - - key.offset = found_key.offset + 1; - btrfs_release_path(path); - } - - if (!fctx.delete_pass && fctx.need_delete) { - fctx.delete_pass = 1; - goto again; - } - -out: - btrfs_free_path(path); - fs_path_free(sctx, fctx.cur_path); - fs_path_free(sctx, fctx.dir_path); - return ret; -} - /* * This does all the move/link/unlink/rmdir magic. */ @@ -2674,6 +2692,7 @@ static int process_recorded_refs(struct send_ctx *sctx) { int ret = 0; struct recorded_ref *cur; + struct recorded_ref *cur2; struct ulist *check_dirs = NULL; struct ulist_iterator uit; struct ulist_node *un; @@ -2685,6 +2704,12 @@ static int process_recorded_refs(struct send_ctx *sctx) verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); + /* + * This should never happen as the root dir always has the same ref + * which is always '..' + */ + BUG_ON(sctx->cur_ino <= BTRFS_FIRST_FREE_OBJECTID); + valid_path = fs_path_alloc(sctx); if (!valid_path) { ret = -ENOMEM; @@ -2731,6 +2756,46 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); list_for_each_entry(cur, &sctx->new_refs, list) { /* + * We may have refs where the parent directory does not exist + * yet. This happens if the parent directories inum is higher + * the the current inum. To handle this case, we create the + * parent directory out of order. But we need to check if this + * did already happen before due to other refs in the same dir. + */ + ret = get_cur_inode_state(sctx, cur->dir, cur->dir_gen); + if (ret < 0) + goto out; + if (ret == inode_state_will_create) { + ret = 0; + /* + * First check if any of the current inodes refs did + * already create the dir. + */ + list_for_each_entry(cur2, &sctx->new_refs, list) { + if (cur == cur2) + break; + if (cur2->dir == cur->dir) { + ret = 1; + break; + } + } + + /* + * If that did not happen, check if a previous inode + * did already create the dir. + */ + if (!ret) + ret = did_create_dir(sctx, cur->dir); + if (ret < 0) + goto out; + if (!ret) { + ret = send_create_inode(sctx, cur->dir); + if (ret < 0) + goto out; + } + } + + /* * Check if this new ref would overwrite the first ref of * another unprocessed inode. If yes, orphanize the * overwritten inode. If we find an overwritten ref that is @@ -2764,7 +2829,7 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); * inode, move it and update valid_path. If not, link or move * it depending on the inode mode. */ - if (is_orphan && !sctx->cur_inode_first_ref_orphan) { + if (is_orphan) { ret = send_rename(sctx, valid_path, cur->full_path); if (ret < 0) goto out; @@ -2827,6 +2892,17 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); if (ret < 0) goto out; } + } else if (S_ISDIR(sctx->cur_inode_mode) && + !list_empty(&sctx->deleted_refs)) { + /* + * We have a moved dir. Add the old parent to check_dirs + */ + cur = list_entry(sctx->deleted_refs.next, struct recorded_ref, + list); + ret = ulist_add(check_dirs, cur->dir, cur->dir_gen, + GFP_NOFS); + if (ret < 0) + goto out; } else if (!S_ISDIR(sctx->cur_inode_mode)) { /* * We have a non dir inode. Go through all deleted refs and @@ -2840,35 +2916,9 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); if (ret < 0) goto out; if (!ret) { - /* - * In case the inode was moved to a directory - * that was not created yet (see - * __record_new_ref), we can not unlink the ref - * as it will be needed later when the parent - * directory is created, so that we can move in - * the inode to the new dir. - */ - if (!is_orphan && - sctx->cur_inode_first_ref_orphan) { - ret = orphanize_inode(sctx, - sctx->cur_ino, - sctx->cur_inode_gen, - cur->full_path); - if (ret < 0) - goto out; - ret = gen_unique_name(sctx, - sctx->cur_ino, - sctx->cur_inode_gen, - valid_path); - if (ret < 0) - goto out; - is_orphan = 1; - - } else { - ret = send_unlink(sctx, cur->full_path); - if (ret < 0) - goto out; - } + ret = send_unlink(sctx, cur->full_path); + if (ret < 0) + goto out; } ret = ulist_add(check_dirs, cur->dir, cur->dir_gen, GFP_NOFS); @@ -2880,12 +2930,11 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); * If the inode is still orphan, unlink the orphan. This may * happen when a previous inode did overwrite the first ref * of this inode and no new refs were added for the current - * inode. - * We can however not delete the orphan in case the inode relies - * in a directory that was not created yet (see - * __record_new_ref) + * inode. Unlinking does not mean that the inode is deleted in + * all cases. There may still be links to this inode in other + * places. */ - if (is_orphan && !sctx->cur_inode_first_ref_orphan) { + if (is_orphan) { ret = send_unlink(sctx, valid_path); if (ret < 0) goto out; @@ -2900,6 +2949,11 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); */ ULIST_ITER_INIT(&uit); while ((un = ulist_next(check_dirs, &uit))) { + /* + * In case we had refs into dirs that were not processed yet, + * we don't need to do the utime and rmdir logic for these dirs. + * The dir will be processed later. + */ if (un->val > sctx->cur_ino) continue; @@ -2929,25 +2983,6 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); } } - /* - * Current inode is now at it's new position, so we must increase - * send_progress - */ - sctx->send_progress = sctx->cur_ino + 1; - - /* - * We may have a directory here that has pending refs which could not - * be created before (because the dir did not exist before, see - * __record_new_ref). finish_outoforder_dir will link/move the pending - * refs. - */ - if (S_ISDIR(sctx->cur_inode_mode) && sctx->cur_inode_new) { - ret = finish_outoforder_dir(sctx, sctx->cur_ino, - sctx->cur_inode_gen); - if (ret < 0) - goto out; - } - ret = 0; out: @@ -2971,34 +3006,9 @@ static int __record_new_ref(int num, u64 dir, int index, return -ENOMEM; ret = get_inode_info(sctx->send_root, dir, NULL, &gen, NULL, NULL, - NULL); - if (ret < 0) - goto out; - - /* - * The parent may be non-existent at this point in time. This happens - * if the ino of the parent dir is higher then the current ino. In this - * case, we can not process this ref until the parent dir is finally - * created. If we reach the parent dir later, process_recorded_refs - * will go through all dir items and process the refs that could not be - * processed before. In case this is the first ref, we set - * cur_inode_first_ref_orphan to 1 to inform process_recorded_refs to - * keep an orphan of the inode so that it later can be used for - * link/move - */ - ret = is_inode_existent(sctx, dir, gen); + NULL, NULL); if (ret < 0) goto out; - if (!ret) { - ret = is_first_ref(sctx, sctx->send_root, sctx->cur_ino, dir, - name->start, fs_path_len(name)); - if (ret < 0) - goto out; - if (ret) - sctx->cur_inode_first_ref_orphan = 1; - ret = 0; - goto out; - } ret = get_cur_path(sctx, dir, gen, p); if (ret < 0) @@ -3029,7 +3039,7 @@ static int __record_deleted_ref(int num, u64 dir, int index, return -ENOMEM; ret = get_inode_info(sctx->parent_root, dir, NULL, &gen, NULL, NULL, - NULL); + NULL, NULL); if (ret < 0) goto out; @@ -3206,33 +3216,28 @@ static int process_all_refs(struct send_ctx *sctx, key.offset = 0; while (1) { ret = btrfs_search_slot_for_read(root, &key, path, 1, 0); - if (ret < 0) { - btrfs_release_path(path); + if (ret < 0) goto out; - } - if (ret) { - btrfs_release_path(path); + if (ret) break; - } eb = path->nodes[0]; slot = path->slots[0]; btrfs_item_key_to_cpu(eb, &found_key, slot); if (found_key.objectid != key.objectid || - found_key.type != key.type) { - btrfs_release_path(path); + found_key.type != key.type) break; - } - ret = iterate_inode_ref(sctx, sctx->parent_root, path, - &found_key, 0, cb, sctx); + ret = iterate_inode_ref(sctx, root, path, &found_key, 0, cb, + sctx); btrfs_release_path(path); if (ret < 0) goto out; key.offset = found_key.offset + 1; } + btrfs_release_path(path); ret = process_recorded_refs(sctx); @@ -3555,7 +3560,7 @@ static int send_write(struct send_ctx *sctx, u64 offset, u32 len) int ret = 0; struct fs_path *p; loff_t pos = offset; - int readed = 0; + int num_read = 0; mm_segment_t old_fs; p = fs_path_alloc(sctx); @@ -3580,8 +3585,8 @@ verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len); ret = vfs_read(sctx->cur_inode_filp, sctx->read_buf, len, &pos); if (ret < 0) goto out; - readed = ret; - if (!readed) + num_read = ret; + if (!num_read) goto out; ret = begin_cmd(sctx, BTRFS_SEND_C_WRITE); @@ -3594,7 +3599,7 @@ verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len); TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p); TLV_PUT_U64(sctx, BTRFS_SEND_A_FILE_OFFSET, offset); - TLV_PUT(sctx, BTRFS_SEND_A_DATA, sctx->read_buf, readed); + TLV_PUT(sctx, BTRFS_SEND_A_DATA, sctx->read_buf, num_read); ret = send_cmd(sctx); @@ -3604,7 +3609,7 @@ out: set_fs(old_fs); if (ret < 0) return ret; - return readed; + return num_read; } /* @@ -3615,7 +3620,6 @@ static int send_clone(struct send_ctx *sctx, struct clone_root *clone_root) { int ret = 0; - struct btrfs_root *clone_root2 = clone_root->root; struct fs_path *p; u64 gen; @@ -3640,22 +3644,23 @@ verbose_printk("btrfs: send_clone offset=%llu, len=%d, clone_root=%llu, " TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_LEN, len); TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p); - if (clone_root2 == sctx->send_root) { + if (clone_root->root == sctx->send_root) { ret = get_inode_info(sctx->send_root, clone_root->ino, NULL, - &gen, NULL, NULL, NULL); + &gen, NULL, NULL, NULL, NULL); if (ret < 0) goto out; ret = get_cur_path(sctx, clone_root->ino, gen, p); } else { - ret = get_inode_path(sctx, clone_root2, clone_root->ino, p); + ret = get_inode_path(sctx, clone_root->root, + clone_root->ino, p); } if (ret < 0) goto out; TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID, - clone_root2->root_item.uuid); + clone_root->root->root_item.uuid); TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_CTRANSID, - clone_root2->root_item.ctransid); + clone_root->root->root_item.ctransid); TLV_PUT_PATH(sctx, BTRFS_SEND_A_CLONE_PATH, p); TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_OFFSET, clone_root->offset); @@ -3684,10 +3689,17 @@ static int send_write_or_clone(struct send_ctx *sctx, ei = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_file_extent_item); type = btrfs_file_extent_type(path->nodes[0], ei); - if (type == BTRFS_FILE_EXTENT_INLINE) + if (type == BTRFS_FILE_EXTENT_INLINE) { len = btrfs_file_extent_inline_len(path->nodes[0], ei); - else + /* + * it is possible the inline item won't cover the whole page, + * but there may be items after this page. Make + * sure to send the whole thing + */ + len = PAGE_CACHE_ALIGN(len); + } else { len = btrfs_file_extent_num_bytes(path->nodes[0], ei); + } if (offset + len > sctx->cur_inode_size) len = sctx->cur_inode_size - offset; @@ -3735,6 +3747,8 @@ static int is_extent_unchanged(struct send_ctx *sctx, u64 left_offset_fixed; u64 left_len; u64 right_len; + u64 left_gen; + u64 right_gen; u8 left_type; u8 right_type; @@ -3744,17 +3758,17 @@ static int is_extent_unchanged(struct send_ctx *sctx, eb = left_path->nodes[0]; slot = left_path->slots[0]; - ei = btrfs_item_ptr(eb, slot, struct btrfs_file_extent_item); left_type = btrfs_file_extent_type(eb, ei); - left_disknr = btrfs_file_extent_disk_bytenr(eb, ei); - left_len = btrfs_file_extent_num_bytes(eb, ei); - left_offset = btrfs_file_extent_offset(eb, ei); if (left_type != BTRFS_FILE_EXTENT_REG) { ret = 0; goto out; } + left_disknr = btrfs_file_extent_disk_bytenr(eb, ei); + left_len = btrfs_file_extent_num_bytes(eb, ei); + left_offset = btrfs_file_extent_offset(eb, ei); + left_gen = btrfs_file_extent_generation(eb, ei); /* * Following comments will refer to these graphics. L is the left @@ -3810,6 +3824,7 @@ static int is_extent_unchanged(struct send_ctx *sctx, right_disknr = btrfs_file_extent_disk_bytenr(eb, ei); right_len = btrfs_file_extent_num_bytes(eb, ei); right_offset = btrfs_file_extent_offset(eb, ei); + right_gen = btrfs_file_extent_generation(eb, ei); if (right_type != BTRFS_FILE_EXTENT_REG) { ret = 0; @@ -3820,7 +3835,7 @@ static int is_extent_unchanged(struct send_ctx *sctx, * Are we at extent 8? If yes, we know the extent is changed. * This may only happen on the first iteration. */ - if (found_key.offset + right_len < ekey->offset) { + if (found_key.offset + right_len <= ekey->offset) { ret = 0; goto out; } @@ -3837,8 +3852,9 @@ static int is_extent_unchanged(struct send_ctx *sctx, /* * Check if we have the same extent. */ - if (left_disknr + left_offset_fixed != - right_disknr + right_offset) { + if (left_disknr != right_disknr || + left_offset_fixed != right_offset || + left_gen != right_gen) { ret = 0; goto out; } @@ -3977,6 +3993,15 @@ static int process_recorded_refs_if_needed(struct send_ctx *sctx, int at_end) goto out; ret = process_recorded_refs(sctx); + if (ret < 0) + goto out; + + /* + * We have processed the refs and thus need to advance send_progress. + * Now, calls to get_cur_xxx will take the updated refs of the current + * inode into account. + */ + sctx->send_progress = sctx->cur_ino + 1; out: return ret; @@ -4004,7 +4029,7 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end) goto out; ret = get_inode_info(sctx->send_root, sctx->cur_ino, NULL, NULL, - &left_mode, &left_uid, &left_gid); + &left_mode, &left_uid, &left_gid, NULL); if (ret < 0) goto out; @@ -4015,7 +4040,7 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end) } else { ret = get_inode_info(sctx->parent_root, sctx->cur_ino, NULL, NULL, &right_mode, &right_uid, - &right_gid); + &right_gid, NULL); if (ret < 0) goto out; @@ -4074,7 +4099,12 @@ static int changed_inode(struct send_ctx *sctx, sctx->cur_ino = key->objectid; sctx->cur_inode_new_gen = 0; - sctx->cur_inode_first_ref_orphan = 0; + + /* + * Set send_progress to current inode. This will tell all get_cur_xxx + * functions that the current inode's refs are not updated yet. Later, + * when process_recorded_refs is finished, it is set to cur_ino + 1. + */ sctx->send_progress = sctx->cur_ino; if (result == BTRFS_COMPARE_TREE_NEW || @@ -4098,7 +4128,14 @@ static int changed_inode(struct send_ctx *sctx, right_gen = btrfs_inode_generation(sctx->right_path->nodes[0], right_ii); - if (left_gen != right_gen) + + /* + * The cur_ino = root dir case is special here. We can't treat + * the inode as deleted+reused because it would generate a + * stream that tries to delete/mkdir the root dir. + */ + if (left_gen != right_gen && + sctx->cur_ino != BTRFS_FIRST_FREE_OBJECTID) sctx->cur_inode_new_gen = 1; } @@ -4111,8 +4148,7 @@ static int changed_inode(struct send_ctx *sctx, sctx->cur_inode_mode = btrfs_inode_mode( sctx->left_path->nodes[0], left_ii); if (sctx->cur_ino != BTRFS_FIRST_FREE_OBJECTID) - ret = send_create_inode(sctx, sctx->left_path, - sctx->cmp_key); + ret = send_create_inode_if_needed(sctx); } else if (result == BTRFS_COMPARE_TREE_DELETED) { sctx->cur_inode_gen = right_gen; sctx->cur_inode_new = 0; @@ -4122,7 +4158,17 @@ static int changed_inode(struct send_ctx *sctx, sctx->cur_inode_mode = btrfs_inode_mode( sctx->right_path->nodes[0], right_ii); } else if (result == BTRFS_COMPARE_TREE_CHANGED) { + /* + * We need to do some special handling in case the inode was + * reported as changed with a changed generation number. This + * means that the original inode was deleted and new inode + * reused the same inum. So we have to treat the old inode as + * deleted and the new one as new. + */ if (sctx->cur_inode_new_gen) { + /* + * First, process the inode as if it was deleted. + */ sctx->cur_inode_gen = right_gen; sctx->cur_inode_new = 0; sctx->cur_inode_deleted = 1; @@ -4135,6 +4181,9 @@ static int changed_inode(struct send_ctx *sctx, if (ret < 0) goto out; + /* + * Now process the inode as if it was new. + */ sctx->cur_inode_gen = left_gen; sctx->cur_inode_new = 1; sctx->cur_inode_deleted = 0; @@ -4142,14 +4191,23 @@ static int changed_inode(struct send_ctx *sctx, sctx->left_path->nodes[0], left_ii); sctx->cur_inode_mode = btrfs_inode_mode( sctx->left_path->nodes[0], left_ii); - ret = send_create_inode(sctx, sctx->left_path, - sctx->cmp_key); + ret = send_create_inode_if_needed(sctx); if (ret < 0) goto out; ret = process_all_refs(sctx, BTRFS_COMPARE_TREE_NEW); if (ret < 0) goto out; + /* + * Advance send_progress now as we did not get into + * process_recorded_refs_if_needed in the new_gen case. + */ + sctx->send_progress = sctx->cur_ino + 1; + + /* + * Now process all extents and xattrs of the inode as if + * they were all new. + */ ret = process_all_extents(sctx); if (ret < 0) goto out; @@ -4172,6 +4230,16 @@ out: return ret; } +/* + * We have to process new refs before deleted refs, but compare_trees gives us + * the new and deleted refs mixed. To fix this, we record the new/deleted refs + * first and later process them in process_recorded_refs. + * For the cur_inode_new_gen case, we skip recording completely because + * changed_inode did already initiate processing of refs. The reason for this is + * that in this case, compare_tree actually compares the refs of 2 different + * inodes. To fix this, process_all_refs is used in changed_inode to handle all + * refs of the right tree as deleted and all refs of the left tree as new. + */ static int changed_ref(struct send_ctx *sctx, enum btrfs_compare_tree_result result) { @@ -4192,6 +4260,11 @@ static int changed_ref(struct send_ctx *sctx, return ret; } +/* + * Process new/deleted/changed xattrs. We skip processing in the + * cur_inode_new_gen case because changed_inode did already initiate processing + * of xattrs. The reason is the same as in changed_ref + */ static int changed_xattr(struct send_ctx *sctx, enum btrfs_compare_tree_result result) { @@ -4211,6 +4284,11 @@ static int changed_xattr(struct send_ctx *sctx, return ret; } +/* + * Process new/deleted/changed extents. We skip processing in the + * cur_inode_new_gen case because changed_inode did already initiate processing + * of extents. The reason is the same as in changed_ref + */ static int changed_extent(struct send_ctx *sctx, enum btrfs_compare_tree_result result) { @@ -4227,7 +4305,10 @@ static int changed_extent(struct send_ctx *sctx, return ret; } - +/* + * Updates compare related fields in sctx and simply forwards to the actual + * changed_xxx functions. + */ static int changed_cb(struct btrfs_root *left_root, struct btrfs_root *right_root, struct btrfs_path *left_path, @@ -4247,6 +4328,11 @@ static int changed_cb(struct btrfs_root *left_root, if (ret < 0) goto out; + /* Ignore non-FS objects */ + if (key->objectid == BTRFS_FREE_INO_OBJECTID || + key->objectid == BTRFS_FREE_SPACE_OBJECTID) + goto out; + if (key->type == BTRFS_INODE_ITEM_KEY) ret = changed_inode(sctx, result); else if (key->type == BTRFS_INODE_REF_KEY) @@ -4299,7 +4385,8 @@ join_trans: } /* - * Make sure the tree has not changed + * Make sure the tree has not changed after re-joining. We detect this + * by comparing start_ctransid and ctransid. They should always match. */ spin_lock(&send_root->root_times_lock); ctransid = btrfs_root_ctransid(&send_root->root_item); diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h index 9934e948e57f..1bf4f32fd4ef 100644 --- a/fs/btrfs/send.h +++ b/fs/btrfs/send.h @@ -130,4 +130,5 @@ enum { #ifdef __KERNEL__ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg); +int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off); #endif diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 83d6f9f9c220..915ac14c2064 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -243,12 +243,18 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *function, unsigned int line, int errno) { - WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted"); + WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted\n"); trans->aborted = errno; /* Nothing used. The other threads that have joined this * transaction may be able to continue. */ if (!trans->blocks_used) { - btrfs_printk(root->fs_info, "Aborting unused transaction.\n"); + char nbuf[16]; + const char *errstr; + + errstr = btrfs_decode_error(root->fs_info, errno, nbuf); + btrfs_printk(root->fs_info, + "%s:%d: Aborting unused transaction(%s).\n", + function, line, errstr); return; } trans->transaction->aborted = errno; @@ -407,7 +413,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_set_opt(info->mount_opt, NODATASUM); break; case Opt_nodatacow: - printk(KERN_INFO "btrfs: setting nodatacow\n"); + if (!btrfs_test_opt(root, COMPRESS) || + !btrfs_test_opt(root, FORCE_COMPRESS)) { + printk(KERN_INFO "btrfs: setting nodatacow, compression disabled\n"); + } else { + printk(KERN_INFO "btrfs: setting nodatacow\n"); + } + info->compress_type = BTRFS_COMPRESS_NONE; + btrfs_clear_opt(info->mount_opt, COMPRESS); + btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); btrfs_set_opt(info->mount_opt, NODATACOW); btrfs_set_opt(info->mount_opt, NODATASUM); break; @@ -422,10 +436,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) compress_type = "zlib"; info->compress_type = BTRFS_COMPRESS_ZLIB; btrfs_set_opt(info->mount_opt, COMPRESS); + btrfs_clear_opt(info->mount_opt, NODATACOW); + btrfs_clear_opt(info->mount_opt, NODATASUM); } else if (strcmp(args[0].from, "lzo") == 0) { compress_type = "lzo"; info->compress_type = BTRFS_COMPRESS_LZO; btrfs_set_opt(info->mount_opt, COMPRESS); + btrfs_clear_opt(info->mount_opt, NODATACOW); + btrfs_clear_opt(info->mount_opt, NODATASUM); btrfs_set_fs_incompat(info, COMPRESS_LZO); } else if (strncmp(args[0].from, "no", 2) == 0) { compress_type = "no"; @@ -543,11 +561,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG); break; case Opt_defrag: - printk(KERN_INFO "btrfs: enabling auto defrag"); + printk(KERN_INFO "btrfs: enabling auto defrag\n"); btrfs_set_opt(info->mount_opt, AUTO_DEFRAG); break; case Opt_recovery: - printk(KERN_INFO "btrfs: enabling auto recovery"); + printk(KERN_INFO "btrfs: enabling auto recovery\n"); btrfs_set_opt(info->mount_opt, RECOVERY); break; case Opt_skip_balance: @@ -846,18 +864,15 @@ int btrfs_sync_fs(struct super_block *sb, int wait) return 0; } - btrfs_wait_ordered_extents(root, 0, 0); - - spin_lock(&fs_info->trans_lock); - if (!fs_info->running_transaction) { - spin_unlock(&fs_info->trans_lock); - return 0; - } - spin_unlock(&fs_info->trans_lock); + btrfs_wait_ordered_extents(root, 0); - trans = btrfs_join_transaction(root); - if (IS_ERR(trans)) + trans = btrfs_attach_transaction(root); + if (IS_ERR(trans)) { + /* no transaction, don't bother */ + if (PTR_ERR(trans) == -ENOENT) + return 0; return PTR_ERR(trans); + } return btrfs_commit_transaction(trans, root); } @@ -1508,17 +1523,21 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, static int btrfs_freeze(struct super_block *sb) { - struct btrfs_fs_info *fs_info = btrfs_sb(sb); - mutex_lock(&fs_info->transaction_kthread_mutex); - mutex_lock(&fs_info->cleaner_mutex); - return 0; + struct btrfs_trans_handle *trans; + struct btrfs_root *root = btrfs_sb(sb)->tree_root; + + trans = btrfs_attach_transaction(root); + if (IS_ERR(trans)) { + /* no transaction, don't bother */ + if (PTR_ERR(trans) == -ENOENT) + return 0; + return PTR_ERR(trans); + } + return btrfs_commit_transaction(trans, root); } static int btrfs_unfreeze(struct super_block *sb) { - struct btrfs_fs_info *fs_info = btrfs_sb(sb); - mutex_unlock(&fs_info->cleaner_mutex); - mutex_unlock(&fs_info->transaction_kthread_mutex); return 0; } @@ -1595,7 +1614,7 @@ static int btrfs_interface_init(void) static void btrfs_interface_exit(void) { if (misc_deregister(&btrfs_misc) < 0) - printk(KERN_INFO "misc_deregister failed for control device"); + printk(KERN_INFO "btrfs: misc_deregister failed for control device\n"); } static int __init init_btrfs_fs(void) @@ -1620,10 +1639,14 @@ static int __init init_btrfs_fs(void) if (err) goto free_extent_io; - err = btrfs_delayed_inode_init(); + err = ordered_data_init(); if (err) goto free_extent_map; + err = btrfs_delayed_inode_init(); + if (err) + goto free_ordered_data; + err = btrfs_interface_init(); if (err) goto free_delayed_inode; @@ -1641,6 +1664,8 @@ unregister_ioctl: btrfs_interface_exit(); free_delayed_inode: btrfs_delayed_inode_exit(); +free_ordered_data: + ordered_data_exit(); free_extent_map: extent_map_exit(); free_extent_io: @@ -1657,6 +1682,7 @@ static void __exit exit_btrfs_fs(void) { btrfs_destroy_cachep(); btrfs_delayed_inode_exit(); + ordered_data_exit(); extent_map_exit(); extent_io_exit(); btrfs_interface_exit(); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 27c26004e050..77db875b5116 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -53,7 +53,7 @@ static noinline void switch_commit_root(struct btrfs_root *root) /* * either allocate a new transaction or hop into the existing one */ -static noinline int join_transaction(struct btrfs_root *root, int nofail) +static noinline int join_transaction(struct btrfs_root *root, int type) { struct btrfs_transaction *cur_trans; struct btrfs_fs_info *fs_info = root->fs_info; @@ -67,7 +67,13 @@ loop: } if (fs_info->trans_no_join) { - if (!nofail) { + /* + * If we are JOIN_NOLOCK we're already committing a current + * transaction, we just need a handle to deal with something + * when committing the transaction, such as inode cache and + * space cache. It is a special case. + */ + if (type != TRANS_JOIN_NOLOCK) { spin_unlock(&fs_info->trans_lock); return -EBUSY; } @@ -87,6 +93,13 @@ loop: } spin_unlock(&fs_info->trans_lock); + /* + * If we are ATTACH, we just want to catch the current transaction, + * and commit it. If there is no transaction, just return ENOENT. + */ + if (type == TRANS_ATTACH) + return -ENOENT; + cur_trans = kmem_cache_alloc(btrfs_transaction_cachep, GFP_NOFS); if (!cur_trans) return -ENOMEM; @@ -267,13 +280,6 @@ static void wait_current_trans(struct btrfs_root *root) } } -enum btrfs_trans_type { - TRANS_START, - TRANS_JOIN, - TRANS_USERSPACE, - TRANS_JOIN_NOLOCK, -}; - static int may_wait_transaction(struct btrfs_root *root, int type) { if (root->fs_info->log_root_recovering) @@ -290,7 +296,8 @@ static int may_wait_transaction(struct btrfs_root *root, int type) } static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, - u64 num_items, int type) + u64 num_items, int type, + int noflush) { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; @@ -324,9 +331,14 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, } num_bytes = btrfs_calc_trans_metadata_size(root, num_items); - ret = btrfs_block_rsv_add(root, - &root->fs_info->trans_block_rsv, - num_bytes); + if (noflush) + ret = btrfs_block_rsv_add_noflush(root, + &root->fs_info->trans_block_rsv, + num_bytes); + else + ret = btrfs_block_rsv_add(root, + &root->fs_info->trans_block_rsv, + num_bytes); if (ret) return ERR_PTR(ret); } @@ -335,19 +347,34 @@ again: if (!h) return ERR_PTR(-ENOMEM); - sb_start_intwrite(root->fs_info->sb); + /* + * If we are JOIN_NOLOCK we're already committing a transaction and + * waiting on this guy, so we don't need to do the sb_start_intwrite + * because we're already holding a ref. We need this because we could + * have raced in and did an fsync() on a file which can kick a commit + * and then we deadlock with somebody doing a freeze. + * + * If we are ATTACH, it means we just want to catch the current + * transaction and commit it, so we needn't do sb_start_intwrite(). + */ + if (type < TRANS_JOIN_NOLOCK) + sb_start_intwrite(root->fs_info->sb); if (may_wait_transaction(root, type)) wait_current_trans(root); do { - ret = join_transaction(root, type == TRANS_JOIN_NOLOCK); + ret = join_transaction(root, type); if (ret == -EBUSY) wait_current_trans(root); } while (ret == -EBUSY); if (ret < 0) { - sb_end_intwrite(root->fs_info->sb); + /* We must get the transaction if we are JOIN_NOLOCK. */ + BUG_ON(type == TRANS_JOIN_NOLOCK); + + if (type < TRANS_JOIN_NOLOCK) + sb_end_intwrite(root->fs_info->sb); kmem_cache_free(btrfs_trans_handle_cachep, h); return ERR_PTR(ret); } @@ -367,7 +394,9 @@ again: h->aborted = 0; h->qgroup_reserved = qgroup_reserved; h->delayed_ref_elem.seq = 0; + h->type = type; INIT_LIST_HEAD(&h->qgroup_ref_list); + INIT_LIST_HEAD(&h->new_bgs); smp_mb(); if (cur_trans->blocked && may_wait_transaction(root, type)) { @@ -393,21 +422,33 @@ got_it: struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_items) { - return start_transaction(root, num_items, TRANS_START); + return start_transaction(root, num_items, TRANS_START, 0); +} + +struct btrfs_trans_handle *btrfs_start_transaction_noflush( + struct btrfs_root *root, int num_items) +{ + return start_transaction(root, num_items, TRANS_START, 1); } + struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root) { - return start_transaction(root, 0, TRANS_JOIN); + return start_transaction(root, 0, TRANS_JOIN, 0); } struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root) { - return start_transaction(root, 0, TRANS_JOIN_NOLOCK); + return start_transaction(root, 0, TRANS_JOIN_NOLOCK, 0); } struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root) { - return start_transaction(root, 0, TRANS_USERSPACE); + return start_transaction(root, 0, TRANS_USERSPACE, 0); +} + +struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root) +{ + return start_transaction(root, 0, TRANS_ATTACH, 0); } /* wait for a transaction commit to be fully complete */ @@ -506,11 +547,12 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, } static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int throttle, int lock) + struct btrfs_root *root, int throttle) { struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_fs_info *info = root->fs_info; int count = 0; + int lock = (trans->type != TRANS_JOIN_NOLOCK); int err = 0; if (--trans->use_count) { @@ -536,6 +578,9 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, trans->qgroup_reserved = 0; } + if (!list_empty(&trans->new_bgs)) + btrfs_create_pending_block_groups(trans, root); + while (count < 2) { unsigned long cur = trans->delayed_ref_updates; trans->delayed_ref_updates = 0; @@ -551,7 +596,8 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, btrfs_trans_release_metadata(trans, root); trans->block_rsv = NULL; - sb_end_intwrite(root->fs_info->sb); + if (!list_empty(&trans->new_bgs)) + btrfs_create_pending_block_groups(trans, root); if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) && should_end_transaction(trans, root)) { @@ -573,6 +619,9 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, } } + if (trans->type < TRANS_JOIN_NOLOCK) + sb_end_intwrite(root->fs_info->sb); + WARN_ON(cur_trans != info->running_transaction); WARN_ON(atomic_read(&cur_trans->num_writers) < 1); atomic_dec(&cur_trans->num_writers); @@ -604,7 +653,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans, { int ret; - ret = __btrfs_end_transaction(trans, root, 0, 1); + ret = __btrfs_end_transaction(trans, root, 0); if (ret) return ret; return 0; @@ -615,18 +664,7 @@ int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, { int ret; - ret = __btrfs_end_transaction(trans, root, 1, 1); - if (ret) - return ret; - return 0; -} - -int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, - struct btrfs_root *root) -{ - int ret; - - ret = __btrfs_end_transaction(trans, root, 0, 0); + ret = __btrfs_end_transaction(trans, root, 1); if (ret) return ret; return 0; @@ -635,7 +673,7 @@ int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - return __btrfs_end_transaction(trans, root, 1, 1); + return __btrfs_end_transaction(trans, root, 1); } /* @@ -649,13 +687,15 @@ int btrfs_write_marked_extents(struct btrfs_root *root, int err = 0; int werr = 0; struct address_space *mapping = root->fs_info->btree_inode->i_mapping; + struct extent_state *cached_state = NULL; u64 start = 0; u64 end; while (!find_first_extent_bit(dirty_pages, start, &start, &end, - mark)) { - convert_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT, mark, - GFP_NOFS); + mark, &cached_state)) { + convert_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT, + mark, &cached_state, GFP_NOFS); + cached_state = NULL; err = filemap_fdatawrite_range(mapping, start, end); if (err) werr = err; @@ -679,12 +719,14 @@ int btrfs_wait_marked_extents(struct btrfs_root *root, int err = 0; int werr = 0; struct address_space *mapping = root->fs_info->btree_inode->i_mapping; + struct extent_state *cached_state = NULL; u64 start = 0; u64 end; while (!find_first_extent_bit(dirty_pages, start, &start, &end, - EXTENT_NEED_WAIT)) { - clear_extent_bits(dirty_pages, start, end, EXTENT_NEED_WAIT, GFP_NOFS); + EXTENT_NEED_WAIT, &cached_state)) { + clear_extent_bit(dirty_pages, start, end, EXTENT_NEED_WAIT, + 0, 0, &cached_state, GFP_NOFS); err = filemap_fdatawait_range(mapping, start, end); if (err) werr = err; @@ -955,6 +997,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root *parent_root; struct btrfs_block_rsv *rsv; struct inode *parent_inode; + struct btrfs_path *path; + struct btrfs_dir_item *dir_item; struct dentry *parent; struct dentry *dentry; struct extent_buffer *tmp; @@ -967,18 +1011,22 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, u64 root_flags; uuid_le new_uuid; - rsv = trans->block_rsv; + path = btrfs_alloc_path(); + if (!path) { + ret = pending->error = -ENOMEM; + goto path_alloc_fail; + } new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS); if (!new_root_item) { ret = pending->error = -ENOMEM; - goto fail; + goto root_item_alloc_fail; } ret = btrfs_find_free_objectid(tree_root, &objectid); if (ret) { pending->error = ret; - goto fail; + goto no_free_objectid; } btrfs_reloc_pre_snapshot(trans, pending, &to_reserve); @@ -988,22 +1036,22 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, to_reserve); if (ret) { pending->error = ret; - goto fail; + goto no_free_objectid; } } ret = btrfs_qgroup_inherit(trans, fs_info, root->root_key.objectid, objectid, pending->inherit); - kfree(pending->inherit); if (ret) { pending->error = ret; - goto fail; + goto no_free_objectid; } key.objectid = objectid; key.offset = (u64)-1; key.type = BTRFS_ROOT_ITEM_KEY; + rsv = trans->block_rsv; trans->block_rsv = &pending->block_rsv; dentry = pending->dentry; @@ -1017,24 +1065,21 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, */ ret = btrfs_set_inode_index(parent_inode, &index); BUG_ON(ret); /* -ENOMEM */ - ret = btrfs_insert_dir_item(trans, parent_root, - dentry->d_name.name, dentry->d_name.len, - parent_inode, &key, - BTRFS_FT_DIR, index); - if (ret == -EEXIST) { + + /* check if there is a file/dir which has the same name. */ + dir_item = btrfs_lookup_dir_item(NULL, parent_root, path, + btrfs_ino(parent_inode), + dentry->d_name.name, + dentry->d_name.len, 0); + if (dir_item != NULL && !IS_ERR(dir_item)) { pending->error = -EEXIST; - dput(parent); goto fail; - } else if (ret) { - goto abort_trans_dput; + } else if (IS_ERR(dir_item)) { + ret = PTR_ERR(dir_item); + btrfs_abort_transaction(trans, root, ret); + goto fail; } - - btrfs_i_size_write(parent_inode, parent_inode->i_size + - dentry->d_name.len * 2); - parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME; - ret = btrfs_update_inode(trans, parent_root, parent_inode); - if (ret) - goto abort_trans_dput; + btrfs_release_path(path); /* * pull in the delayed directory update @@ -1043,8 +1088,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, * snapshot */ ret = btrfs_run_delayed_items(trans, root); - if (ret) { /* Transaction aborted */ - dput(parent); + if (ret) { /* Transaction aborted */ + btrfs_abort_transaction(trans, root, ret); goto fail; } @@ -1079,7 +1124,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, if (ret) { btrfs_tree_unlock(old); free_extent_buffer(old); - goto abort_trans_dput; + btrfs_abort_transaction(trans, root, ret); + goto fail; } btrfs_set_lock_blocking(old); @@ -1088,8 +1134,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, /* clean up in any case */ btrfs_tree_unlock(old); free_extent_buffer(old); - if (ret) - goto abort_trans_dput; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } /* see comments in should_cow_block() */ root->force_cow = 1; @@ -1101,8 +1149,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, ret = btrfs_insert_root(trans, tree_root, &key, new_root_item); btrfs_tree_unlock(tmp); free_extent_buffer(tmp); - if (ret) - goto abort_trans_dput; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } /* * insert root back/forward references @@ -1111,32 +1161,58 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, parent_root->root_key.objectid, btrfs_ino(parent_inode), index, dentry->d_name.name, dentry->d_name.len); - dput(parent); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto fail; + } key.offset = (u64)-1; pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key); if (IS_ERR(pending->snap)) { ret = PTR_ERR(pending->snap); - goto abort_trans; + btrfs_abort_transaction(trans, root, ret); + goto fail; } ret = btrfs_reloc_post_snapshot(trans, pending); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } + + ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } + + ret = btrfs_insert_dir_item(trans, parent_root, + dentry->d_name.name, dentry->d_name.len, + parent_inode, &key, + BTRFS_FT_DIR, index); + /* We have check then name at the beginning, so it is impossible. */ + BUG_ON(ret == -EEXIST); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto fail; + } + + btrfs_i_size_write(parent_inode, parent_inode->i_size + + dentry->d_name.len * 2); + parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME; + ret = btrfs_update_inode(trans, parent_root, parent_inode); if (ret) - goto abort_trans; - ret = 0; + btrfs_abort_transaction(trans, root, ret); fail: - kfree(new_root_item); + dput(parent); trans->block_rsv = rsv; +no_free_objectid: + kfree(new_root_item); +root_item_alloc_fail: + btrfs_free_path(path); +path_alloc_fail: btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1); return ret; - -abort_trans_dput: - dput(parent); -abort_trans: - btrfs_abort_transaction(trans, root, ret); - goto fail; } /* @@ -1229,6 +1305,16 @@ static void do_async_commit(struct work_struct *work) struct btrfs_async_commit *ac = container_of(work, struct btrfs_async_commit, work.work); + /* + * We've got freeze protection passed with the transaction. + * Tell lockdep about it. + */ + rwsem_acquire_read( + &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], + 0, 1, _THIS_IP_); + + current->journal_info = ac->newtrans; + btrfs_commit_transaction(ac->newtrans, ac->root); kfree(ac); } @@ -1258,6 +1344,14 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, atomic_inc(&cur_trans->use_count); btrfs_end_transaction(trans, root); + + /* + * Tell lockdep we've released the freeze rwsem, since the + * async commit thread will be the one to unlock it. + */ + rwsem_release(&root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], + 1, _THIS_IP_); + schedule_delayed_work(&ac->work, 0); /* wait for transaction to start and unblock */ @@ -1348,6 +1442,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, */ cur_trans->delayed_refs.flushing = 1; + if (!list_empty(&trans->new_bgs)) + btrfs_create_pending_block_groups(trans, root); + ret = btrfs_run_delayed_refs(trans, root, 0); if (ret) goto cleanup_transaction; @@ -1403,7 +1500,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, if (flush_on_commit || snap_pending) { btrfs_start_delalloc_inodes(root, 1); - btrfs_wait_ordered_extents(root, 0, 1); + btrfs_wait_ordered_extents(root, 1); } ret = btrfs_run_delayed_items(trans, root); @@ -1456,13 +1553,28 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, */ mutex_lock(&root->fs_info->reloc_mutex); - ret = btrfs_run_delayed_items(trans, root); + /* + * We needn't worry about the delayed items because we will + * deal with them in create_pending_snapshot(), which is the + * core function of the snapshot creation. + */ + ret = create_pending_snapshots(trans, root->fs_info); if (ret) { mutex_unlock(&root->fs_info->reloc_mutex); goto cleanup_transaction; } - ret = create_pending_snapshots(trans, root->fs_info); + /* + * We insert the dir indexes of the snapshots and update the inode + * of the snapshots' parents after the snapshot creation, so there + * are some delayed items which are not dealt with. Now deal with + * them. + * + * We needn't worry that this operation will corrupt the snapshots, + * because all the tree which are snapshoted will be forced to COW + * the nodes and leaves. + */ + ret = btrfs_run_delayed_items(trans, root); if (ret) { mutex_unlock(&root->fs_info->reloc_mutex); goto cleanup_transaction; @@ -1584,7 +1696,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, put_transaction(cur_trans); put_transaction(cur_trans); - sb_end_intwrite(root->fs_info->sb); + if (trans->type < TRANS_JOIN_NOLOCK) + sb_end_intwrite(root->fs_info->sb); trace_btrfs_transaction_commit(root); diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index e8b8416c688b..80961947a6b2 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -47,6 +47,14 @@ struct btrfs_transaction { int aborted; }; +enum btrfs_trans_type { + TRANS_START, + TRANS_JOIN, + TRANS_USERSPACE, + TRANS_JOIN_NOLOCK, + TRANS_ATTACH, +}; + struct btrfs_trans_handle { u64 transid; u64 bytes_reserved; @@ -58,8 +66,9 @@ struct btrfs_trans_handle { struct btrfs_transaction *transaction; struct btrfs_block_rsv *block_rsv; struct btrfs_block_rsv *orig_rsv; - int aborted; - int adding_csums; + short aborted; + short adding_csums; + enum btrfs_trans_type type; /* * this root is only needed to validate that the root passed to * start_transaction is the same as the one passed to end_transaction. @@ -68,6 +77,7 @@ struct btrfs_trans_handle { struct btrfs_root *root; struct seq_list delayed_ref_elem; struct list_head qgroup_ref_list; + struct list_head new_bgs; }; struct btrfs_pending_snapshot { @@ -88,16 +98,18 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, { BTRFS_I(inode)->last_trans = trans->transaction->transid; BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; + BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; } int btrfs_end_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); -int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, - struct btrfs_root *root); struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_items); +struct btrfs_trans_handle *btrfs_start_transaction_noflush( + struct btrfs_root *root, int num_items); struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); +struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index c86670f4f285..e9ebb472b28b 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -18,13 +18,16 @@ #include <linux/sched.h> #include <linux/slab.h> +#include <linux/list_sort.h> #include "ctree.h" #include "transaction.h" #include "disk-io.h" #include "locking.h" #include "print-tree.h" +#include "backref.h" #include "compat.h" #include "tree-log.h" +#include "hash.h" /* magic values for the inode_only field in btrfs_log_inode: * @@ -146,7 +149,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans, root->log_multiple_pids = true; } - root->log_batch++; + atomic_inc(&root->log_batch); atomic_inc(&root->log_writers); mutex_unlock(&root->log_mutex); return 0; @@ -165,7 +168,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans, err = ret; } mutex_unlock(&root->fs_info->tree_log_mutex); - root->log_batch++; + atomic_inc(&root->log_batch); atomic_inc(&root->log_writers); mutex_unlock(&root->log_mutex); return err; @@ -484,7 +487,6 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, int found_type; u64 mask = root->sectorsize - 1; u64 extent_end; - u64 alloc_hint; u64 start = key->offset; u64 saved_nbytes; struct btrfs_file_extent_item *item; @@ -550,8 +552,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, saved_nbytes = inode_get_bytes(inode); /* drop any overlapping extents */ - ret = btrfs_drop_extents(trans, inode, start, extent_end, - &alloc_hint, 1); + ret = btrfs_drop_extents(trans, root, inode, start, extent_end, 1); BUG_ON(ret); if (found_type == BTRFS_FILE_EXTENT_REG || @@ -744,6 +745,7 @@ out: */ static noinline int backref_in_log(struct btrfs_root *log, struct btrfs_key *key, + u64 ref_objectid, char *name, int namelen) { struct btrfs_path *path; @@ -764,8 +766,17 @@ static noinline int backref_in_log(struct btrfs_root *log, if (ret != 0) goto out; - item_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); ptr = btrfs_item_ptr_offset(path->nodes[0], path->slots[0]); + + if (key->type == BTRFS_INODE_EXTREF_KEY) { + if (btrfs_find_name_in_ext_backref(path, ref_objectid, + name, namelen, NULL)) + match = 1; + + goto out; + } + + item_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); ptr_end = ptr + item_size; while (ptr < ptr_end) { ref = (struct btrfs_inode_ref *)ptr; @@ -786,91 +797,42 @@ out: return match; } - -/* - * replay one inode back reference item found in the log tree. - * eb, slot and key refer to the buffer and key found in the log tree. - * root is the destination we are replaying into, and path is for temp - * use by this function. (it should be released on return). - */ -static noinline int add_inode_ref(struct btrfs_trans_handle *trans, +static inline int __add_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct btrfs_root *log, struct btrfs_path *path, - struct extent_buffer *eb, int slot, - struct btrfs_key *key) + struct btrfs_root *log_root, + struct inode *dir, struct inode *inode, + struct extent_buffer *eb, + u64 inode_objectid, u64 parent_objectid, + u64 ref_index, char *name, int namelen, + int *search_done) { - struct btrfs_inode_ref *ref; - struct btrfs_dir_item *di; - struct inode *dir; - struct inode *inode; - unsigned long ref_ptr; - unsigned long ref_end; - char *name; - int namelen; int ret; - int search_done = 0; - - /* - * it is possible that we didn't log all the parent directories - * for a given inode. If we don't find the dir, just don't - * copy the back ref in. The link count fixup code will take - * care of the rest - */ - dir = read_one_inode(root, key->offset); - if (!dir) - return -ENOENT; - - inode = read_one_inode(root, key->objectid); - if (!inode) { - iput(dir); - return -EIO; - } - - ref_ptr = btrfs_item_ptr_offset(eb, slot); - ref_end = ref_ptr + btrfs_item_size_nr(eb, slot); + char *victim_name; + int victim_name_len; + struct extent_buffer *leaf; + struct btrfs_dir_item *di; + struct btrfs_key search_key; + struct btrfs_inode_extref *extref; again: - ref = (struct btrfs_inode_ref *)ref_ptr; - - namelen = btrfs_inode_ref_name_len(eb, ref); - name = kmalloc(namelen, GFP_NOFS); - BUG_ON(!name); - - read_extent_buffer(eb, name, (unsigned long)(ref + 1), namelen); - - /* if we already have a perfect match, we're done */ - if (inode_in_dir(root, path, btrfs_ino(dir), btrfs_ino(inode), - btrfs_inode_ref_index(eb, ref), - name, namelen)) { - goto out; - } - - /* - * look for a conflicting back reference in the metadata. - * if we find one we have to unlink that name of the file - * before we add our new link. Later on, we overwrite any - * existing back reference, and we don't want to create - * dangling pointers in the directory. - */ - - if (search_done) - goto insert; - - ret = btrfs_search_slot(NULL, root, key, path, 0, 0); + /* Search old style refs */ + search_key.objectid = inode_objectid; + search_key.type = BTRFS_INODE_REF_KEY; + search_key.offset = parent_objectid; + ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); if (ret == 0) { - char *victim_name; - int victim_name_len; struct btrfs_inode_ref *victim_ref; unsigned long ptr; unsigned long ptr_end; - struct extent_buffer *leaf = path->nodes[0]; + + leaf = path->nodes[0]; /* are we trying to overwrite a back ref for the root directory * if so, just jump out, we're done */ - if (key->objectid == key->offset) - goto out_nowrite; + if (search_key.objectid == search_key.offset) + return 1; /* check all the names in this back reference to see * if they are in the log. if so, we allow them to stay @@ -889,7 +851,9 @@ again: (unsigned long)(victim_ref + 1), victim_name_len); - if (!backref_in_log(log, key, victim_name, + if (!backref_in_log(log_root, &search_key, + parent_objectid, + victim_name, victim_name_len)) { btrfs_inc_nlink(inode); btrfs_release_path(path); @@ -897,9 +861,14 @@ again: ret = btrfs_unlink_inode(trans, root, dir, inode, victim_name, victim_name_len); + BUG_ON(ret); btrfs_run_delayed_items(trans, root); + kfree(victim_name); + *search_done = 1; + goto again; } kfree(victim_name); + ptr = (unsigned long)(victim_ref + 1) + victim_name_len; } BUG_ON(ret); @@ -908,14 +877,78 @@ again: * NOTE: we have searched root tree and checked the * coresponding ref, it does not need to check again. */ - search_done = 1; + *search_done = 1; + } + btrfs_release_path(path); + + /* Same search but for extended refs */ + extref = btrfs_lookup_inode_extref(NULL, root, path, name, namelen, + inode_objectid, parent_objectid, 0, + 0); + if (!IS_ERR_OR_NULL(extref)) { + u32 item_size; + u32 cur_offset = 0; + unsigned long base; + struct inode *victim_parent; + + leaf = path->nodes[0]; + + item_size = btrfs_item_size_nr(leaf, path->slots[0]); + base = btrfs_item_ptr_offset(leaf, path->slots[0]); + + while (cur_offset < item_size) { + extref = (struct btrfs_inode_extref *)base + cur_offset; + + victim_name_len = btrfs_inode_extref_name_len(leaf, extref); + + if (btrfs_inode_extref_parent(leaf, extref) != parent_objectid) + goto next; + + victim_name = kmalloc(victim_name_len, GFP_NOFS); + read_extent_buffer(leaf, victim_name, (unsigned long)&extref->name, + victim_name_len); + + search_key.objectid = inode_objectid; + search_key.type = BTRFS_INODE_EXTREF_KEY; + search_key.offset = btrfs_extref_hash(parent_objectid, + victim_name, + victim_name_len); + ret = 0; + if (!backref_in_log(log_root, &search_key, + parent_objectid, victim_name, + victim_name_len)) { + ret = -ENOENT; + victim_parent = read_one_inode(root, + parent_objectid); + if (victim_parent) { + btrfs_inc_nlink(inode); + btrfs_release_path(path); + + ret = btrfs_unlink_inode(trans, root, + victim_parent, + inode, + victim_name, + victim_name_len); + btrfs_run_delayed_items(trans, root); + } + BUG_ON(ret); + iput(victim_parent); + kfree(victim_name); + *search_done = 1; + goto again; + } + kfree(victim_name); + BUG_ON(ret); +next: + cur_offset += victim_name_len + sizeof(*extref); + } + *search_done = 1; } btrfs_release_path(path); /* look for a conflicting sequence number */ di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir), - btrfs_inode_ref_index(eb, ref), - name, namelen, 0); + ref_index, name, namelen, 0); if (di && !IS_ERR(di)) { ret = drop_one_dir_item(trans, root, path, dir, di); BUG_ON(ret); @@ -931,25 +964,173 @@ again: } btrfs_release_path(path); -insert: - /* insert our name */ - ret = btrfs_add_link(trans, dir, inode, name, namelen, 0, - btrfs_inode_ref_index(eb, ref)); - BUG_ON(ret); + return 0; +} - btrfs_update_inode(trans, root, inode); +static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, + u32 *namelen, char **name, u64 *index, + u64 *parent_objectid) +{ + struct btrfs_inode_extref *extref; -out: - ref_ptr = (unsigned long)(ref + 1) + namelen; - kfree(name); - if (ref_ptr < ref_end) - goto again; + extref = (struct btrfs_inode_extref *)ref_ptr; + + *namelen = btrfs_inode_extref_name_len(eb, extref); + *name = kmalloc(*namelen, GFP_NOFS); + if (*name == NULL) + return -ENOMEM; + + read_extent_buffer(eb, *name, (unsigned long)&extref->name, + *namelen); + + *index = btrfs_inode_extref_index(eb, extref); + if (parent_objectid) + *parent_objectid = btrfs_inode_extref_parent(eb, extref); + + return 0; +} + +static int ref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, + u32 *namelen, char **name, u64 *index) +{ + struct btrfs_inode_ref *ref; + + ref = (struct btrfs_inode_ref *)ref_ptr; + + *namelen = btrfs_inode_ref_name_len(eb, ref); + *name = kmalloc(*namelen, GFP_NOFS); + if (*name == NULL) + return -ENOMEM; + + read_extent_buffer(eb, *name, (unsigned long)(ref + 1), *namelen); + + *index = btrfs_inode_ref_index(eb, ref); + + return 0; +} + +/* + * replay one inode back reference item found in the log tree. + * eb, slot and key refer to the buffer and key found in the log tree. + * root is the destination we are replaying into, and path is for temp + * use by this function. (it should be released on return). + */ +static noinline int add_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_root *log, + struct btrfs_path *path, + struct extent_buffer *eb, int slot, + struct btrfs_key *key) +{ + struct inode *dir; + struct inode *inode; + unsigned long ref_ptr; + unsigned long ref_end; + char *name; + int namelen; + int ret; + int search_done = 0; + int log_ref_ver = 0; + u64 parent_objectid; + u64 inode_objectid; + u64 ref_index = 0; + int ref_struct_size; + + ref_ptr = btrfs_item_ptr_offset(eb, slot); + ref_end = ref_ptr + btrfs_item_size_nr(eb, slot); + + if (key->type == BTRFS_INODE_EXTREF_KEY) { + struct btrfs_inode_extref *r; + + ref_struct_size = sizeof(struct btrfs_inode_extref); + log_ref_ver = 1; + r = (struct btrfs_inode_extref *)ref_ptr; + parent_objectid = btrfs_inode_extref_parent(eb, r); + } else { + ref_struct_size = sizeof(struct btrfs_inode_ref); + parent_objectid = key->offset; + } + inode_objectid = key->objectid; + + /* + * it is possible that we didn't log all the parent directories + * for a given inode. If we don't find the dir, just don't + * copy the back ref in. The link count fixup code will take + * care of the rest + */ + dir = read_one_inode(root, parent_objectid); + if (!dir) + return -ENOENT; + + inode = read_one_inode(root, inode_objectid); + if (!inode) { + iput(dir); + return -EIO; + } + + while (ref_ptr < ref_end) { + if (log_ref_ver) { + ret = extref_get_fields(eb, ref_ptr, &namelen, &name, + &ref_index, &parent_objectid); + /* + * parent object can change from one array + * item to another. + */ + if (!dir) + dir = read_one_inode(root, parent_objectid); + if (!dir) + return -ENOENT; + } else { + ret = ref_get_fields(eb, ref_ptr, &namelen, &name, + &ref_index); + } + if (ret) + return ret; + + /* if we already have a perfect match, we're done */ + if (!inode_in_dir(root, path, btrfs_ino(dir), btrfs_ino(inode), + ref_index, name, namelen)) { + /* + * look for a conflicting back reference in the + * metadata. if we find one we have to unlink that name + * of the file before we add our new link. Later on, we + * overwrite any existing back reference, and we don't + * want to create dangling pointers in the directory. + */ + + if (!search_done) { + ret = __add_inode_ref(trans, root, path, log, + dir, inode, eb, + inode_objectid, + parent_objectid, + ref_index, name, namelen, + &search_done); + if (ret == 1) + goto out; + BUG_ON(ret); + } + + /* insert our name */ + ret = btrfs_add_link(trans, dir, inode, name, namelen, + 0, ref_index); + BUG_ON(ret); + + btrfs_update_inode(trans, root, inode); + } + + ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + namelen; + kfree(name); + if (log_ref_ver) { + iput(dir); + dir = NULL; + } + } /* finally write the back reference in the inode */ ret = overwrite_item(trans, root, path, eb, slot, key); BUG_ON(ret); -out_nowrite: +out: btrfs_release_path(path); iput(dir); iput(inode); @@ -966,25 +1147,55 @@ static int insert_orphan_item(struct btrfs_trans_handle *trans, return ret; } +static int count_inode_extrefs(struct btrfs_root *root, + struct inode *inode, struct btrfs_path *path) +{ + int ret = 0; + int name_len; + unsigned int nlink = 0; + u32 item_size; + u32 cur_offset = 0; + u64 inode_objectid = btrfs_ino(inode); + u64 offset = 0; + unsigned long ptr; + struct btrfs_inode_extref *extref; + struct extent_buffer *leaf; -/* - * There are a few corners where the link count of the file can't - * be properly maintained during replay. So, instead of adding - * lots of complexity to the log code, we just scan the backrefs - * for any file that has been through replay. - * - * The scan will update the link count on the inode to reflect the - * number of back refs found. If it goes down to zero, the iput - * will free the inode. - */ -static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct inode *inode) + while (1) { + ret = btrfs_find_one_extref(root, inode_objectid, offset, path, + &extref, &offset); + if (ret) + break; + + leaf = path->nodes[0]; + item_size = btrfs_item_size_nr(leaf, path->slots[0]); + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + + while (cur_offset < item_size) { + extref = (struct btrfs_inode_extref *) (ptr + cur_offset); + name_len = btrfs_inode_extref_name_len(leaf, extref); + + nlink++; + + cur_offset += name_len + sizeof(*extref); + } + + offset++; + btrfs_release_path(path); + } + btrfs_release_path(path); + + if (ret < 0) + return ret; + return nlink; +} + +static int count_inode_refs(struct btrfs_root *root, + struct inode *inode, struct btrfs_path *path) { - struct btrfs_path *path; int ret; struct btrfs_key key; - u64 nlink = 0; + unsigned int nlink = 0; unsigned long ptr; unsigned long ptr_end; int name_len; @@ -994,10 +1205,6 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, key.type = BTRFS_INODE_REF_KEY; key.offset = (u64)-1; - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - while (1) { ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) @@ -1031,6 +1238,50 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, btrfs_release_path(path); } btrfs_release_path(path); + + return nlink; +} + +/* + * There are a few corners where the link count of the file can't + * be properly maintained during replay. So, instead of adding + * lots of complexity to the log code, we just scan the backrefs + * for any file that has been through replay. + * + * The scan will update the link count on the inode to reflect the + * number of back refs found. If it goes down to zero, the iput + * will free the inode. + */ +static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct inode *inode) +{ + struct btrfs_path *path; + int ret; + u64 nlink = 0; + u64 ino = btrfs_ino(inode); + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + ret = count_inode_refs(root, inode, path); + if (ret < 0) + goto out; + + nlink = ret; + + ret = count_inode_extrefs(root, inode, path); + if (ret == -ENOENT) + ret = 0; + + if (ret < 0) + goto out; + + nlink += ret; + + ret = 0; + if (nlink != inode->i_nlink) { set_nlink(inode, nlink); btrfs_update_inode(trans, root, inode); @@ -1046,9 +1297,10 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, ret = insert_orphan_item(trans, root, ino); BUG_ON(ret); } - btrfs_free_path(path); - return 0; +out: + btrfs_free_path(path); + return ret; } static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans, @@ -1695,6 +1947,10 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb, ret = add_inode_ref(wc->trans, root, log, path, eb, i, &key); BUG_ON(ret && ret != -ENOENT); + } else if (key.type == BTRFS_INODE_EXTREF_KEY) { + ret = add_inode_ref(wc->trans, root, log, path, + eb, i, &key); + BUG_ON(ret && ret != -ENOENT); } else if (key.type == BTRFS_EXTENT_DATA_KEY) { ret = replay_one_extent(wc->trans, root, path, eb, i, &key); @@ -2037,7 +2293,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, if (atomic_read(&root->log_commit[(index1 + 1) % 2])) wait_log_commit(trans, root, root->log_transid - 1); while (1) { - unsigned long batch = root->log_batch; + int batch = atomic_read(&root->log_batch); /* when we're on an ssd, just kick the log commit out */ if (!btrfs_test_opt(root, SSD) && root->log_multiple_pids) { mutex_unlock(&root->log_mutex); @@ -2045,7 +2301,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, mutex_lock(&root->log_mutex); } wait_for_writer(trans, root); - if (batch == root->log_batch) + if (batch == atomic_read(&root->log_batch)) break; } @@ -2074,7 +2330,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, btrfs_set_root_node(&log->root_item, log->node); - root->log_batch = 0; root->log_transid++; log->log_transid = root->log_transid; root->log_start_pid = 0; @@ -2087,7 +2342,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, mutex_unlock(&root->log_mutex); mutex_lock(&log_root_tree->log_mutex); - log_root_tree->log_batch++; + atomic_inc(&log_root_tree->log_batch); atomic_inc(&log_root_tree->log_writers); mutex_unlock(&log_root_tree->log_mutex); @@ -2157,7 +2412,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, btrfs_set_super_log_root_level(root->fs_info->super_for_commit, btrfs_header_level(log_root_tree->node)); - log_root_tree->log_batch = 0; log_root_tree->log_transid++; smp_mb(); @@ -2171,9 +2425,12 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, * in and cause problems either. */ btrfs_scrub_pause_super(root); - write_ctree_super(trans, root->fs_info->tree_root, 1); + ret = write_ctree_super(trans, root->fs_info->tree_root, 1); btrfs_scrub_continue_super(root); - ret = 0; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out_wake_log_root; + } mutex_lock(&root->log_mutex); if (root->last_log_commit < log_transid) @@ -2209,7 +2466,8 @@ static void free_log_tree(struct btrfs_trans_handle *trans, while (1) { ret = find_first_extent_bit(&log->dirty_log_pages, - 0, &start, &end, EXTENT_DIRTY | EXTENT_NEW); + 0, &start, &end, EXTENT_DIRTY | EXTENT_NEW, + NULL); if (ret) break; @@ -2646,6 +2904,7 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans, int ret; struct btrfs_key key; struct btrfs_key found_key; + int start_slot; key.objectid = objectid; key.type = max_key_type; @@ -2667,8 +2926,18 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans, if (found_key.objectid != objectid) break; - ret = btrfs_del_item(trans, log, path); - if (ret) + found_key.offset = 0; + found_key.type = 0; + ret = btrfs_bin_search(path->nodes[0], &found_key, 0, + &start_slot); + + ret = btrfs_del_items(trans, log, path, start_slot, + path->slots[0] - start_slot + 1); + /* + * If start slot isn't 0 then we don't need to re-search, we've + * found the last guy with the objectid in this tree. + */ + if (ret || start_slot != 0) break; btrfs_release_path(path); } @@ -2678,14 +2947,64 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans, return ret; } +static void fill_inode_item(struct btrfs_trans_handle *trans, + struct extent_buffer *leaf, + struct btrfs_inode_item *item, + struct inode *inode, int log_inode_only) +{ + btrfs_set_inode_uid(leaf, item, inode->i_uid); + btrfs_set_inode_gid(leaf, item, inode->i_gid); + btrfs_set_inode_mode(leaf, item, inode->i_mode); + btrfs_set_inode_nlink(leaf, item, inode->i_nlink); + + btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_nsec); + + btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_nsec); + + btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_nsec); + + btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode)); + + btrfs_set_inode_sequence(leaf, item, inode->i_version); + btrfs_set_inode_transid(leaf, item, trans->transid); + btrfs_set_inode_rdev(leaf, item, inode->i_rdev); + btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags); + btrfs_set_inode_block_group(leaf, item, 0); + + if (log_inode_only) { + /* set the generation to zero so the recover code + * can tell the difference between an logging + * just to say 'this inode exists' and a logging + * to say 'update this inode with these values' + */ + btrfs_set_inode_generation(leaf, item, 0); + btrfs_set_inode_size(leaf, item, 0); + } else { + btrfs_set_inode_generation(leaf, item, + BTRFS_I(inode)->generation); + btrfs_set_inode_size(leaf, item, inode->i_size); + } + +} + static noinline int copy_items(struct btrfs_trans_handle *trans, - struct btrfs_root *log, + struct inode *inode, struct btrfs_path *dst_path, struct extent_buffer *src, int start_slot, int nr, int inode_only) { unsigned long src_offset; unsigned long dst_offset; + struct btrfs_root *log = BTRFS_I(inode)->root->log_root; struct btrfs_file_extent_item *extent; struct btrfs_inode_item *inode_item; int ret; @@ -2694,6 +3013,7 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, char *ins_data; int i; struct list_head ordered_sums; + int skip_csum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; INIT_LIST_HEAD(&ordered_sums); @@ -2722,29 +3042,23 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, src_offset = btrfs_item_ptr_offset(src, start_slot + i); - copy_extent_buffer(dst_path->nodes[0], src, dst_offset, - src_offset, ins_sizes[i]); - - if (inode_only == LOG_INODE_EXISTS && - ins_keys[i].type == BTRFS_INODE_ITEM_KEY) { + if (ins_keys[i].type == BTRFS_INODE_ITEM_KEY) { inode_item = btrfs_item_ptr(dst_path->nodes[0], dst_path->slots[0], struct btrfs_inode_item); - btrfs_set_inode_size(dst_path->nodes[0], inode_item, 0); - - /* set the generation to zero so the recover code - * can tell the difference between an logging - * just to say 'this inode exists' and a logging - * to say 'update this inode with these values' - */ - btrfs_set_inode_generation(dst_path->nodes[0], - inode_item, 0); + fill_inode_item(trans, dst_path->nodes[0], inode_item, + inode, inode_only == LOG_INODE_EXISTS); + } else { + copy_extent_buffer(dst_path->nodes[0], src, dst_offset, + src_offset, ins_sizes[i]); } + /* take a reference on file data extents so that truncates * or deletes of this inode don't have to relog the inode * again */ - if (btrfs_key_type(ins_keys + i) == BTRFS_EXTENT_DATA_KEY) { + if (btrfs_key_type(ins_keys + i) == BTRFS_EXTENT_DATA_KEY && + !skip_csum) { int found_type; extent = btrfs_item_ptr(src, start_slot + i, struct btrfs_file_extent_item); @@ -2753,8 +3067,7 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, continue; found_type = btrfs_file_extent_type(src, extent); - if (found_type == BTRFS_FILE_EXTENT_REG || - found_type == BTRFS_FILE_EXTENT_PREALLOC) { + if (found_type == BTRFS_FILE_EXTENT_REG) { u64 ds, dl, cs, cl; ds = btrfs_file_extent_disk_bytenr(src, extent); @@ -2803,6 +3116,239 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, return ret; } +static int extent_cmp(void *priv, struct list_head *a, struct list_head *b) +{ + struct extent_map *em1, *em2; + + em1 = list_entry(a, struct extent_map, list); + em2 = list_entry(b, struct extent_map, list); + + if (em1->start < em2->start) + return -1; + else if (em1->start > em2->start) + return 1; + return 0; +} + +struct log_args { + struct extent_buffer *src; + u64 next_offset; + int start_slot; + int nr; +}; + +static int log_one_extent(struct btrfs_trans_handle *trans, + struct inode *inode, struct btrfs_root *root, + struct extent_map *em, struct btrfs_path *path, + struct btrfs_path *dst_path, struct log_args *args) +{ + struct btrfs_root *log = root->log_root; + struct btrfs_file_extent_item *fi; + struct btrfs_key key; + u64 start = em->mod_start; + u64 search_start = start; + u64 len = em->mod_len; + u64 num_bytes; + int nritems; + int ret; + + if (BTRFS_I(inode)->logged_trans == trans->transid) { + ret = __btrfs_drop_extents(trans, log, inode, dst_path, start, + start + len, NULL, 0); + if (ret) + return ret; + } + + while (len) { + if (args->nr) + goto next_slot; +again: + key.objectid = btrfs_ino(inode); + key.type = BTRFS_EXTENT_DATA_KEY; + key.offset = search_start; + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret < 0) + return ret; + + if (ret) { + /* + * A rare case were we can have an em for a section of a + * larger extent so we need to make sure that this em + * falls within the extent we've found. If not we just + * bail and go back to ye-olde way of doing things but + * it happens often enough in testing that we need to do + * this dance to make sure. + */ + do { + if (path->slots[0] == 0) { + btrfs_release_path(path); + if (search_start == 0) + return -ENOENT; + search_start--; + goto again; + } + + path->slots[0]--; + btrfs_item_key_to_cpu(path->nodes[0], &key, + path->slots[0]); + if (key.objectid != btrfs_ino(inode) || + key.type != BTRFS_EXTENT_DATA_KEY) { + btrfs_release_path(path); + return -ENOENT; + } + } while (key.offset > start); + + fi = btrfs_item_ptr(path->nodes[0], path->slots[0], + struct btrfs_file_extent_item); + num_bytes = btrfs_file_extent_num_bytes(path->nodes[0], + fi); + if (key.offset + num_bytes <= start) { + btrfs_release_path(path); + return -ENOENT; + } + } + args->src = path->nodes[0]; +next_slot: + btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); + fi = btrfs_item_ptr(args->src, path->slots[0], + struct btrfs_file_extent_item); + if (args->nr && + args->start_slot + args->nr == path->slots[0]) { + args->nr++; + } else if (args->nr) { + ret = copy_items(trans, inode, dst_path, args->src, + args->start_slot, args->nr, + LOG_INODE_ALL); + if (ret) + return ret; + args->nr = 1; + args->start_slot = path->slots[0]; + } else if (!args->nr) { + args->nr = 1; + args->start_slot = path->slots[0]; + } + nritems = btrfs_header_nritems(path->nodes[0]); + path->slots[0]++; + num_bytes = btrfs_file_extent_num_bytes(args->src, fi); + if (len < num_bytes) { + /* I _think_ this is ok, envision we write to a + * preallocated space that is adjacent to a previously + * written preallocated space that gets merged when we + * mark this preallocated space written. If we do not + * have the adjacent extent in cache then when we copy + * this extent it could end up being larger than our EM + * thinks it is, which is a-ok, so just set len to 0. + */ + len = 0; + } else { + len -= num_bytes; + } + start = key.offset + num_bytes; + args->next_offset = start; + search_start = start; + + if (path->slots[0] < nritems) { + if (len) + goto next_slot; + break; + } + + if (args->nr) { + ret = copy_items(trans, inode, dst_path, args->src, + args->start_slot, args->nr, + LOG_INODE_ALL); + if (ret) + return ret; + args->nr = 0; + btrfs_release_path(path); + } + } + + return 0; +} + +static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct inode *inode, + struct btrfs_path *path, + struct btrfs_path *dst_path) +{ + struct log_args args; + struct extent_map *em, *n; + struct list_head extents; + struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; + u64 test_gen; + int ret = 0; + + INIT_LIST_HEAD(&extents); + + memset(&args, 0, sizeof(args)); + + write_lock(&tree->lock); + test_gen = root->fs_info->last_trans_committed; + + list_for_each_entry_safe(em, n, &tree->modified_extents, list) { + list_del_init(&em->list); + if (em->generation <= test_gen) + continue; + /* Need a ref to keep it from getting evicted from cache */ + atomic_inc(&em->refs); + set_bit(EXTENT_FLAG_LOGGING, &em->flags); + list_add_tail(&em->list, &extents); + } + + list_sort(NULL, &extents, extent_cmp); + + while (!list_empty(&extents)) { + em = list_entry(extents.next, struct extent_map, list); + + list_del_init(&em->list); + clear_bit(EXTENT_FLAG_LOGGING, &em->flags); + + /* + * If we had an error we just need to delete everybody from our + * private list. + */ + if (ret) { + free_extent_map(em); + continue; + } + + write_unlock(&tree->lock); + + /* + * If the previous EM and the last extent we left off on aren't + * sequential then we need to copy the items we have and redo + * our search + */ + if (args.nr && em->mod_start != args.next_offset) { + ret = copy_items(trans, inode, dst_path, args.src, + args.start_slot, args.nr, + LOG_INODE_ALL); + if (ret) { + free_extent_map(em); + write_lock(&tree->lock); + continue; + } + btrfs_release_path(path); + args.nr = 0; + } + + ret = log_one_extent(trans, inode, root, em, path, dst_path, &args); + free_extent_map(em); + write_lock(&tree->lock); + } + WARN_ON(!list_empty(&extents)); + write_unlock(&tree->lock); + + if (!ret && args.nr) + ret = copy_items(trans, inode, dst_path, args.src, + args.start_slot, args.nr, LOG_INODE_ALL); + btrfs_release_path(path); + return ret; +} + /* log a single inode in the tree log. * At least one parent directory for this inode must exist in the tree * or be logged already. @@ -2832,6 +3378,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, int nritems; int ins_start_slot = 0; int ins_nr; + bool fast_search = false; u64 ino = btrfs_ino(inode); log = root->log_root; @@ -2851,21 +3398,23 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, max_key.objectid = ino; - /* today the code can only do partial logging of directories */ - if (!S_ISDIR(inode->i_mode)) - inode_only = LOG_INODE_ALL; + /* today the code can only do partial logging of directories */ if (inode_only == LOG_INODE_EXISTS || S_ISDIR(inode->i_mode)) max_key.type = BTRFS_XATTR_ITEM_KEY; else max_key.type = (u8)-1; max_key.offset = (u64)-1; - ret = btrfs_commit_inode_delayed_items(trans, inode); - if (ret) { - btrfs_free_path(path); - btrfs_free_path(dst_path); - return ret; + /* Only run delayed items if we are a dir or a new file */ + if (S_ISDIR(inode->i_mode) || + BTRFS_I(inode)->generation > root->fs_info->last_trans_committed) { + ret = btrfs_commit_inode_delayed_items(trans, inode); + if (ret) { + btrfs_free_path(path); + btrfs_free_path(dst_path); + return ret; + } } mutex_lock(&BTRFS_I(inode)->log_mutex); @@ -2881,7 +3430,16 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, max_key_type = BTRFS_XATTR_ITEM_KEY; ret = drop_objectid_items(trans, log, path, ino, max_key_type); } else { - ret = btrfs_truncate_inode_items(trans, log, inode, 0, 0); + if (test_and_clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags)) { + ret = btrfs_truncate_inode_items(trans, log, + inode, 0, 0); + } else { + fast_search = true; + max_key.type = BTRFS_XATTR_ITEM_KEY; + ret = drop_objectid_items(trans, log, path, ino, + BTRFS_XATTR_ITEM_KEY); + } } if (ret) { err = ret; @@ -2912,7 +3470,7 @@ again: goto next_slot; } - ret = copy_items(trans, log, dst_path, src, ins_start_slot, + ret = copy_items(trans, inode, dst_path, src, ins_start_slot, ins_nr, inode_only); if (ret) { err = ret; @@ -2930,7 +3488,7 @@ next_slot: goto again; } if (ins_nr) { - ret = copy_items(trans, log, dst_path, src, + ret = copy_items(trans, inode, dst_path, src, ins_start_slot, ins_nr, inode_only); if (ret) { @@ -2951,8 +3509,7 @@ next_slot: break; } if (ins_nr) { - ret = copy_items(trans, log, dst_path, src, - ins_start_slot, + ret = copy_items(trans, inode, dst_path, src, ins_start_slot, ins_nr, inode_only); if (ret) { err = ret; @@ -2960,7 +3517,24 @@ next_slot: } ins_nr = 0; } - WARN_ON(ins_nr); + + if (fast_search) { + btrfs_release_path(path); + btrfs_release_path(dst_path); + ret = btrfs_log_changed_extents(trans, root, inode, path, + dst_path); + if (ret) { + err = ret; + goto out_unlock; + } + } else { + struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; + struct extent_map *em, *n; + + list_for_each_entry_safe(em, n, &tree->modified_extents, list) + list_del_init(&em->list); + } + if (inode_only == LOG_INODE_ALL && S_ISDIR(inode->i_mode)) { btrfs_release_path(path); btrfs_release_path(dst_path); @@ -2971,6 +3545,7 @@ next_slot: } } BTRFS_I(inode)->logged_trans = trans->transid; + BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->last_sub_trans; out_unlock: mutex_unlock(&BTRFS_I(inode)->log_mutex); @@ -3138,7 +3713,7 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, end_trans: dput(old_parent); if (ret < 0) { - BUG_ON(ret != -ENOSPC); + WARN_ON(ret != -ENOSPC); root->fs_info->last_trans_log_full_commit = trans->transid; ret = 1; } diff --git a/fs/btrfs/ulist.c b/fs/btrfs/ulist.c index ab942f46b3dd..99be4c138db6 100644 --- a/fs/btrfs/ulist.c +++ b/fs/btrfs/ulist.c @@ -143,14 +143,13 @@ EXPORT_SYMBOL(ulist_free); * In case of allocation failure -ENOMEM is returned and the ulist stays * unaltered. */ -int ulist_add(struct ulist *ulist, u64 val, unsigned long aux, - gfp_t gfp_mask) +int ulist_add(struct ulist *ulist, u64 val, u64 aux, gfp_t gfp_mask) { return ulist_add_merge(ulist, val, aux, NULL, gfp_mask); } -int ulist_add_merge(struct ulist *ulist, u64 val, unsigned long aux, - unsigned long *old_aux, gfp_t gfp_mask) +int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux, + u64 *old_aux, gfp_t gfp_mask) { int i; diff --git a/fs/btrfs/ulist.h b/fs/btrfs/ulist.h index 21bdc8ec8130..21a1963439c3 100644 --- a/fs/btrfs/ulist.h +++ b/fs/btrfs/ulist.h @@ -33,7 +33,7 @@ struct ulist_iterator { */ struct ulist_node { u64 val; /* value to store */ - unsigned long aux; /* auxiliary value saved along with the val */ + u64 aux; /* auxiliary value saved along with the val */ }; struct ulist { @@ -65,10 +65,9 @@ void ulist_fini(struct ulist *ulist); void ulist_reinit(struct ulist *ulist); struct ulist *ulist_alloc(gfp_t gfp_mask); void ulist_free(struct ulist *ulist); -int ulist_add(struct ulist *ulist, u64 val, unsigned long aux, - gfp_t gfp_mask); -int ulist_add_merge(struct ulist *ulist, u64 val, unsigned long aux, - unsigned long *old_aux, gfp_t gfp_mask); +int ulist_add(struct ulist *ulist, u64 val, u64 aux, gfp_t gfp_mask); +int ulist_add_merge(struct ulist *ulist, u64 val, u64 aux, + u64 *old_aux, gfp_t gfp_mask); struct ulist_node *ulist_next(struct ulist *ulist, struct ulist_iterator *uiter); diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 88b969aeeb71..029b903a4ae3 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -639,7 +639,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, bdev = blkdev_get_by_path(device->name->str, flags, holder); if (IS_ERR(bdev)) { - printk(KERN_INFO "open %s failed\n", device->name->str); + printk(KERN_INFO "btrfs: open %s failed\n", device->name->str); goto error; } filemap_write_and_wait(bdev->bd_inode->i_mapping); @@ -1475,6 +1475,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) free_fs_devices(cur_devices); } + root->fs_info->num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(root->fs_info); + /* * at this point, the device is zero sized. We want to * remove it from the devices list and zero out the old super @@ -1775,15 +1778,21 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) if (seeding_dev) { ret = init_first_rw_device(trans, root, device); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto error_trans; + } ret = btrfs_finish_sprout(trans, root); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto error_trans; + } } else { ret = btrfs_add_device(trans, root, device); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, root, ret); goto error_trans; + } } /* @@ -1793,6 +1802,8 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) btrfs_clear_space_info_full(root->fs_info); unlock_chunks(root); + root->fs_info->num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(root->fs_info); ret = btrfs_commit_transaction(trans, root); if (seeding_dev) { @@ -1814,7 +1825,6 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) error_trans: unlock_chunks(root); - btrfs_abort_transaction(trans, root, ret); btrfs_end_transaction(trans, root); rcu_string_free(device->name); kfree(device); @@ -2804,6 +2814,26 @@ int btrfs_balance(struct btrfs_balance_control *bctl, } } + if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { + int num_tolerated_disk_barrier_failures; + u64 target = bctl->sys.target; + + num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); + if (num_tolerated_disk_barrier_failures > 0 && + (target & + (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID0 | + BTRFS_AVAIL_ALLOC_BIT_SINGLE))) + num_tolerated_disk_barrier_failures = 0; + else if (num_tolerated_disk_barrier_failures > 1 && + (target & + (BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10))) + num_tolerated_disk_barrier_failures = 1; + + fs_info->num_tolerated_disk_barrier_failures = + num_tolerated_disk_barrier_failures; + } + ret = insert_balance_item(fs_info->tree_root, bctl); if (ret && ret != -EEXIST) goto out; @@ -2836,6 +2866,11 @@ int btrfs_balance(struct btrfs_balance_control *bctl, __cancel_balance(fs_info); } + if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) { + fs_info->num_tolerated_disk_barrier_failures = + btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); + } + wake_up(&fs_info->balance_wait_q); return ret; @@ -3608,12 +3643,16 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map, &sys_chunk_size, &sys_stripe_size, sys_chunk_offset, alloc_profile); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } ret = btrfs_add_device(trans, fs_info->chunk_root, device); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } /* * Modifying chunk tree needs allocating new blocks from both @@ -3623,19 +3662,19 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans, */ ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset, chunk_size, stripe_size); - if (ret) - goto abort; + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto out; + } ret = __finish_chunk_alloc(trans, extent_root, sys_map, sys_chunk_offset, sys_chunk_size, sys_stripe_size); if (ret) - goto abort; + btrfs_abort_transaction(trans, root, ret); - return 0; +out: -abort: - btrfs_abort_transaction(trans, root, ret); return ret; } @@ -3760,7 +3799,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, read_unlock(&em_tree->lock); if (!em) { - printk(KERN_CRIT "unable to find logical %llu len %llu\n", + printk(KERN_CRIT "btrfs: unable to find logical %llu len %llu\n", (unsigned long long)logical, (unsigned long long)*length); BUG(); @@ -4217,7 +4256,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, total_devs = bbio->num_stripes; if (map_length < length) { - printk(KERN_CRIT "mapping failed logical %llu bio len %llu " + printk(KERN_CRIT "btrfs: mapping failed logical %llu bio len %llu " "len %llu\n", (unsigned long long)logical, (unsigned long long)length, (unsigned long long)map_length); diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index 92c20654cc55..9acb846c3e7f 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -97,7 +97,7 @@ static int zlib_compress_pages(struct list_head *ws, *total_in = 0; if (Z_OK != zlib_deflateInit(&workspace->def_strm, 3)) { - printk(KERN_WARNING "deflateInit failed\n"); + printk(KERN_WARNING "btrfs: deflateInit failed\n"); ret = -1; goto out; } @@ -125,7 +125,7 @@ static int zlib_compress_pages(struct list_head *ws, while (workspace->def_strm.total_in < len) { ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH); if (ret != Z_OK) { - printk(KERN_DEBUG "btrfs deflate in loop returned %d\n", + printk(KERN_DEBUG "btrfs: deflate in loop returned %d\n", ret); zlib_deflateEnd(&workspace->def_strm); ret = -1; @@ -252,7 +252,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in, } if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) { - printk(KERN_WARNING "inflateInit failed\n"); + printk(KERN_WARNING "btrfs: inflateInit failed\n"); return -1; } while (workspace->inf_strm.total_in < srclen) { @@ -336,7 +336,7 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in, } if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) { - printk(KERN_WARNING "inflateInit failed\n"); + printk(KERN_WARNING "btrfs: inflateInit failed\n"); return -1; } |