From e20d96d64f9cf9288ffecc9ad4714e91c3b97ca8 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Thu, 22 Mar 2007 12:13:20 -0400 Subject: Mountable btrfs, with readdir Signed-off-by: Chris Mason --- fs/btrfs/ctree.c | 273 ++++++++++++++++++++++++++++--------------------------- 1 file changed, 140 insertions(+), 133 deletions(-) (limited to 'fs/btrfs/ctree.c') diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 9fbd07c37fde..e690e2bb47d2 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -7,11 +7,11 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size); static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_buffer *dst, struct btrfs_buffer + *root, struct buffer_head *dst, struct buffer_head *src); static int balance_node_right(struct btrfs_trans_handle *trans, struct - btrfs_root *root, struct btrfs_buffer *dst_buf, - struct btrfs_buffer *src_buf); + btrfs_root *root, struct buffer_head *dst_buf, + struct buffer_head *src_buf); static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level, int slot); @@ -32,32 +32,34 @@ void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p) } static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_buffer *buf, struct btrfs_buffer - *parent, int parent_slot, struct btrfs_buffer + *root, struct buffer_head *buf, struct buffer_head + *parent, int parent_slot, struct buffer_head **cow_ret) { - struct btrfs_buffer *cow; + struct buffer_head *cow; + struct btrfs_node *cow_node; - if (!list_empty(&buf->dirty)) { + if (!buffer_dirty(buf)) { *cow_ret = buf; return 0; } cow = btrfs_alloc_free_block(trans, root); - memcpy(&cow->node, &buf->node, root->blocksize); - btrfs_set_header_blocknr(&cow->node.header, cow->blocknr); + cow_node = btrfs_buffer_node(cow); + memcpy(cow_node, btrfs_buffer_node(buf), root->blocksize); + btrfs_set_header_blocknr(&cow_node->header, cow->b_blocknr); *cow_ret = cow; btrfs_inc_ref(trans, root, buf); if (buf == root->node) { root->node = cow; - cow->count++; + get_bh(cow); if (buf != root->commit_root) - btrfs_free_extent(trans, root, buf->blocknr, 1, 1); + btrfs_free_extent(trans, root, buf->b_blocknr, 1, 1); btrfs_block_release(root, buf); } else { - btrfs_set_node_blockptr(&parent->node, parent_slot, - cow->blocknr); - BUG_ON(list_empty(&parent->dirty)); - btrfs_free_extent(trans, root, buf->blocknr, 1, 1); + btrfs_set_node_blockptr(btrfs_buffer_node(parent), parent_slot, + cow->b_blocknr); + BUG_ON(!buffer_dirty(parent)); + btrfs_free_extent(trans, root, buf->b_blocknr, 1, 1); } btrfs_block_release(root, buf); return 0; @@ -119,12 +121,12 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path, { int i; struct btrfs_node *parent = NULL; - struct btrfs_node *node = &path->nodes[level]->node; + struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]); int parent_slot; u32 nritems = btrfs_header_nritems(&node->header); if (path->nodes[level + 1]) - parent = &path->nodes[level + 1]->node; + parent = btrfs_buffer_node(path->nodes[level + 1]); parent_slot = path->slots[level + 1]; BUG_ON(nritems == 0); if (parent) { @@ -148,13 +150,13 @@ static int check_leaf(struct btrfs_root *root, struct btrfs_path *path, int level) { int i; - struct btrfs_leaf *leaf = &path->nodes[level]->leaf; + struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[level]); struct btrfs_node *parent = NULL; int parent_slot; u32 nritems = btrfs_header_nritems(&leaf->header); if (path->nodes[level + 1]) - parent = &path->nodes[level + 1]->node; + parent = btrfs_buffer_node(path->nodes[level + 1]); parent_slot = path->slots[level + 1]; BUG_ON(btrfs_leaf_free_space(root, leaf) < 0); @@ -250,11 +252,11 @@ static int bin_search(struct btrfs_node *c, struct btrfs_key *key, int *slot) return -1; } -static struct btrfs_buffer *read_node_slot(struct btrfs_root *root, - struct btrfs_buffer *parent_buf, +static struct buffer_head *read_node_slot(struct btrfs_root *root, + struct buffer_head *parent_buf, int slot) { - struct btrfs_node *node = &parent_buf->node; + struct btrfs_node *node = btrfs_buffer_node(parent_buf); if (slot < 0) return NULL; if (slot >= btrfs_header_nritems(&node->header)) @@ -265,10 +267,10 @@ static struct btrfs_buffer *read_node_slot(struct btrfs_root *root, static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_buffer *right_buf; - struct btrfs_buffer *mid_buf; - struct btrfs_buffer *left_buf; - struct btrfs_buffer *parent_buf = NULL; + struct buffer_head *right_buf; + struct buffer_head *mid_buf; + struct buffer_head *left_buf; + struct buffer_head *parent_buf = NULL; struct btrfs_node *right = NULL; struct btrfs_node *mid; struct btrfs_node *left = NULL; @@ -283,7 +285,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root return 0; mid_buf = path->nodes[level]; - mid = &mid_buf->node; + mid = btrfs_buffer_node(mid_buf); orig_ptr = btrfs_node_blockptr(mid, orig_slot); if (level < BTRFS_MAX_LEVEL - 1) @@ -295,8 +297,8 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root * by promoting the node below to a root */ if (!parent_buf) { - struct btrfs_buffer *child; - u64 blocknr = mid_buf->blocknr; + struct buffer_head *child; + u64 blocknr = mid_buf->b_blocknr; if (btrfs_header_nritems(&mid->header) != 1) return 0; @@ -313,7 +315,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root clean_tree_block(trans, root, mid_buf); return btrfs_free_extent(trans, root, blocknr, 1, 1); } - parent = &parent_buf->node; + parent = btrfs_buffer_node(parent_buf); if (btrfs_header_nritems(&mid->header) > BTRFS_NODEPTRS_PER_BLOCK(root) / 4) @@ -326,7 +328,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root if (left_buf) { btrfs_cow_block(trans, root, left_buf, parent_buf, pslot - 1, &left_buf); - left = &left_buf->node; + left = btrfs_buffer_node(left_buf); orig_slot += btrfs_header_nritems(&left->header); wret = push_node_left(trans, root, left_buf, mid_buf); if (wret < 0) @@ -339,12 +341,12 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root if (right_buf) { btrfs_cow_block(trans, root, right_buf, parent_buf, pslot + 1, &right_buf); - right = &right_buf->node; + right = btrfs_buffer_node(right_buf); wret = push_node_left(trans, root, mid_buf, right_buf); if (wret < 0) ret = wret; if (btrfs_header_nritems(&right->header) == 0) { - u64 blocknr = right_buf->blocknr; + u64 blocknr = right_buf->b_blocknr; btrfs_block_release(root, right_buf); clean_tree_block(trans, root, right_buf); right_buf = NULL; @@ -360,7 +362,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root memcpy(&parent->ptrs[pslot + 1].key, &right->ptrs[0].key, sizeof(struct btrfs_disk_key)); - BUG_ON(list_empty(&parent_buf->dirty)); + BUG_ON(!buffer_dirty(parent_buf)); } } if (btrfs_header_nritems(&mid->header) == 1) { @@ -381,7 +383,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root } if (btrfs_header_nritems(&mid->header) == 0) { /* we've managed to empty the middle node, drop it */ - u64 blocknr = mid_buf->blocknr; + u64 blocknr = mid_buf->b_blocknr; btrfs_block_release(root, mid_buf); clean_tree_block(trans, root, mid_buf); mid_buf = NULL; @@ -396,13 +398,13 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root /* update the parent key to reflect our changes */ memcpy(&parent->ptrs[pslot].key, &mid->ptrs[0].key, sizeof(struct btrfs_disk_key)); - BUG_ON(list_empty(&parent_buf->dirty)); + BUG_ON(!buffer_dirty(parent_buf)); } /* update the path */ if (left_buf) { if (btrfs_header_nritems(&left->header) > orig_slot) { - left_buf->count++; // released below + get_bh(left_buf); path->nodes[level] = left_buf; path->slots[level + 1] -= 1; path->slots[level] = orig_slot; @@ -415,8 +417,9 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root } /* double check we haven't messed things up */ check_block(root, path, level); - if (orig_ptr != btrfs_node_blockptr(&path->nodes[level]->node, - path->slots[level])) + if (orig_ptr != + btrfs_node_blockptr(btrfs_buffer_node(path->nodes[level]), + path->slots[level])) BUG(); if (right_buf) @@ -443,8 +446,8 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *key, struct btrfs_path *p, int ins_len, int cow) { - struct btrfs_buffer *b; - struct btrfs_buffer *cow_buf; + struct buffer_head *b; + struct buffer_head *cow_buf; struct btrfs_node *c; int slot; int ret; @@ -452,18 +455,20 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root again: b = root->node; - b->count++; + get_bh(b); while (b) { - level = btrfs_header_level(&b->node.header); + c = btrfs_buffer_node(b); + level = btrfs_header_level(&c->header); if (cow) { int wret; - wret = btrfs_cow_block(trans, root, b, p->nodes[level + - 1], p->slots[level + 1], + wret = btrfs_cow_block(trans, root, b, + p->nodes[level + 1], + p->slots[level + 1], &cow_buf); b = cow_buf; } BUG_ON(!cow && ins_len); - c = &b->node; + c = btrfs_buffer_node(b); p->nodes[level] = b; ret = check_block(root, p, level); if (ret) @@ -480,7 +485,7 @@ again: if (sret) return sret; b = p->nodes[level]; - c = &b->node; + c = btrfs_buffer_node(b); slot = p->slots[level]; } else if (ins_len < 0) { int sret = balance_level(trans, root, p, @@ -490,7 +495,7 @@ again: b = p->nodes[level]; if (!b) goto again; - c = &b->node; + c = btrfs_buffer_node(b); slot = p->slots[level]; BUG_ON(btrfs_header_nritems(&c->header) == 1); } @@ -505,11 +510,9 @@ again: if (sret) return sret; } - BUG_ON(root->node->count == 1); return ret; } } - BUG_ON(root->node->count == 1); return 1; } @@ -534,9 +537,9 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, struct btrfs_root int tslot = path->slots[i]; if (!path->nodes[i]) break; - t = &path->nodes[i]->node; + t = btrfs_buffer_node(path->nodes[i]); memcpy(&t->ptrs[tslot].key, key, sizeof(*key)); - BUG_ON(list_empty(&path->nodes[i]->dirty)); + BUG_ON(!buffer_dirty(path->nodes[i])); if (tslot != 0) break; } @@ -551,11 +554,11 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, struct btrfs_root * error, and > 0 if there was no room in the left hand block. */ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_buffer *dst_buf, struct - btrfs_buffer *src_buf) + *root, struct buffer_head *dst_buf, struct + buffer_head *src_buf) { - struct btrfs_node *src = &src_buf->node; - struct btrfs_node *dst = &dst_buf->node; + struct btrfs_node *src = btrfs_buffer_node(src_buf); + struct btrfs_node *dst = btrfs_buffer_node(dst_buf); int push_items = 0; int src_nritems; int dst_nritems; @@ -580,8 +583,8 @@ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root } btrfs_set_header_nritems(&src->header, src_nritems - push_items); btrfs_set_header_nritems(&dst->header, dst_nritems + push_items); - BUG_ON(list_empty(&src_buf->dirty)); - BUG_ON(list_empty(&dst_buf->dirty)); + BUG_ON(!buffer_dirty(src_buf)); + BUG_ON(!buffer_dirty(dst_buf)); return ret; } @@ -595,11 +598,11 @@ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root * this will only push up to 1/2 the contents of the left node over */ static int balance_node_right(struct btrfs_trans_handle *trans, struct - btrfs_root *root, struct btrfs_buffer *dst_buf, - struct btrfs_buffer *src_buf) + btrfs_root *root, struct buffer_head *dst_buf, + struct buffer_head *src_buf) { - struct btrfs_node *src = &src_buf->node; - struct btrfs_node *dst = &dst_buf->node; + struct btrfs_node *src = btrfs_buffer_node(src_buf); + struct btrfs_node *dst = btrfs_buffer_node(dst_buf); int push_items = 0; int max_push; int src_nritems; @@ -628,8 +631,8 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct btrfs_set_header_nritems(&src->header, src_nritems - push_items); btrfs_set_header_nritems(&dst->header, dst_nritems + push_items); - BUG_ON(list_empty(&src_buf->dirty)); - BUG_ON(list_empty(&dst_buf->dirty)); + BUG_ON(!buffer_dirty(src_buf)); + BUG_ON(!buffer_dirty(dst_buf)); return ret; } @@ -643,7 +646,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_buffer *t; + struct buffer_head *t; struct btrfs_node *lower; struct btrfs_node *c; struct btrfs_disk_key *lower_key; @@ -652,24 +655,24 @@ static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root BUG_ON(path->nodes[level-1] != root->node); t = btrfs_alloc_free_block(trans, root); - c = &t->node; + c = btrfs_buffer_node(t); memset(c, 0, root->blocksize); btrfs_set_header_nritems(&c->header, 1); btrfs_set_header_level(&c->header, level); - btrfs_set_header_blocknr(&c->header, t->blocknr); + btrfs_set_header_blocknr(&c->header, t->b_blocknr); btrfs_set_header_parentid(&c->header, - btrfs_header_parentid(&root->node->node.header)); - lower = &path->nodes[level-1]->node; + btrfs_header_parentid(btrfs_buffer_header(root->node))); + lower = btrfs_buffer_node(path->nodes[level-1]); if (btrfs_is_leaf(lower)) lower_key = &((struct btrfs_leaf *)lower)->items[0].key; else lower_key = &lower->ptrs[0].key; memcpy(&c->ptrs[0].key, lower_key, sizeof(struct btrfs_disk_key)); - btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->blocknr); + btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->b_blocknr); /* the super has an extra ref to root->node */ btrfs_block_release(root, root->node); root->node = t; - t->count++; + get_bh(t); path->nodes[level] = t; path->slots[level] = 0; return 0; @@ -692,7 +695,7 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root int nritems; BUG_ON(!path->nodes[level]); - lower = &path->nodes[level]->node; + lower = btrfs_buffer_node(path->nodes[level]); nritems = btrfs_header_nritems(&lower->header); if (slot > nritems) BUG(); @@ -705,7 +708,7 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root memcpy(&lower->ptrs[slot].key, key, sizeof(struct btrfs_disk_key)); btrfs_set_node_blockptr(lower, slot, blocknr); btrfs_set_header_nritems(&lower->header, nritems + 1); - BUG_ON(list_empty(&path->nodes[level]->dirty)); + BUG_ON(!buffer_dirty(path->nodes[level])); return 0; } @@ -721,9 +724,9 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_buffer *t; + struct buffer_head *t; struct btrfs_node *c; - struct btrfs_buffer *split_buffer; + struct buffer_head *split_buffer; struct btrfs_node *split; int mid; int ret; @@ -731,7 +734,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root u32 c_nritems; t = path->nodes[level]; - c = &t->node; + c = btrfs_buffer_node(t); if (t == root->node) { /* trying to split the root, lets make a new one */ ret = insert_new_root(trans, root, path, level + 1); @@ -740,11 +743,11 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root } c_nritems = btrfs_header_nritems(&c->header); split_buffer = btrfs_alloc_free_block(trans, root); - split = &split_buffer->node; + split = btrfs_buffer_node(split_buffer); btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header)); - btrfs_set_header_blocknr(&split->header, split_buffer->blocknr); + btrfs_set_header_blocknr(&split->header, split_buffer->b_blocknr); btrfs_set_header_parentid(&split->header, - btrfs_header_parentid(&root->node->node.header)); + btrfs_header_parentid(btrfs_buffer_header(root->node))); mid = (c_nritems + 1) / 2; memcpy(split->ptrs, c->ptrs + mid, (c_nritems - mid) * sizeof(struct btrfs_key_ptr)); @@ -752,9 +755,9 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_set_header_nritems(&c->header, mid); ret = 0; - BUG_ON(list_empty(&t->dirty)); + BUG_ON(!buffer_dirty(t)); wret = insert_ptr(trans, root, path, &split->ptrs[0].key, - split_buffer->blocknr, path->slots[level + 1] + 1, + split_buffer->b_blocknr, path->slots[level + 1] + 1, level + 1); if (wret) ret = wret; @@ -798,11 +801,12 @@ static int leaf_space_used(struct btrfs_leaf *l, int start, int nr) static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size) { - struct btrfs_buffer *left_buf = path->nodes[0]; - struct btrfs_leaf *left = &left_buf->leaf; + struct buffer_head *left_buf = path->nodes[0]; + struct btrfs_leaf *left = btrfs_buffer_leaf(left_buf); struct btrfs_leaf *right; - struct btrfs_buffer *right_buf; - struct btrfs_buffer *upper; + struct buffer_head *right_buf; + struct buffer_head *upper; + struct btrfs_node *upper_node; int slot; int i; int free_space; @@ -817,12 +821,13 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root return 1; } upper = path->nodes[1]; - if (slot >= btrfs_header_nritems(&upper->node.header) - 1) { + upper_node = btrfs_buffer_node(upper); + if (slot >= btrfs_header_nritems(&upper_node->header) - 1) { return 1; } - right_buf = read_tree_block(root, btrfs_node_blockptr(&upper->node, - slot + 1)); - right = &right_buf->leaf; + right_buf = read_tree_block(root, + btrfs_node_blockptr(btrfs_buffer_node(upper), slot + 1)); + right = btrfs_buffer_leaf(right_buf); free_space = btrfs_leaf_free_space(root, right); if (free_space < data_size + sizeof(struct btrfs_item)) { btrfs_block_release(root, right_buf); @@ -830,7 +835,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root } /* cow and double check */ btrfs_cow_block(trans, root, right_buf, upper, slot + 1, &right_buf); - right = &right_buf->leaf; + right = btrfs_buffer_leaf(right_buf); free_space = btrfs_leaf_free_space(root, right); if (free_space < data_size + sizeof(struct btrfs_item)) { btrfs_block_release(root, right_buf); @@ -881,11 +886,11 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root left_nritems -= push_items; btrfs_set_header_nritems(&left->header, left_nritems); - BUG_ON(list_empty(&left_buf->dirty)); - BUG_ON(list_empty(&right_buf->dirty)); - memcpy(&upper->node.ptrs[slot + 1].key, + BUG_ON(!buffer_dirty(left_buf)); + BUG_ON(!buffer_dirty(right_buf)); + memcpy(&upper_node->ptrs[slot + 1].key, &right->items[0].key, sizeof(struct btrfs_disk_key)); - BUG_ON(list_empty(&upper->dirty)); + BUG_ON(!buffer_dirty(upper)); /* then fixup the leaf pointer in the path */ if (path->slots[0] >= left_nritems) { @@ -905,9 +910,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size) { - struct btrfs_buffer *right_buf = path->nodes[0]; - struct btrfs_leaf *right = &right_buf->leaf; - struct btrfs_buffer *t; + struct buffer_head *right_buf = path->nodes[0]; + struct btrfs_leaf *right = btrfs_buffer_leaf(right_buf); + struct buffer_head *t; struct btrfs_leaf *left; int slot; int i; @@ -926,9 +931,9 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root if (!path->nodes[1]) { return 1; } - t = read_tree_block(root, btrfs_node_blockptr(&path->nodes[1]->node, - slot - 1)); - left = &t->leaf; + t = read_tree_block(root, + btrfs_node_blockptr(btrfs_buffer_node(path->nodes[1]), slot - 1)); + left = btrfs_buffer_leaf(t); free_space = btrfs_leaf_free_space(root, left); if (free_space < data_size + sizeof(struct btrfs_item)) { btrfs_block_release(root, t); @@ -937,7 +942,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root /* cow and double check */ btrfs_cow_block(trans, root, t, path->nodes[1], slot - 1, &t); - left = &t->leaf; + left = btrfs_buffer_leaf(t); free_space = btrfs_leaf_free_space(root, left); if (free_space < data_size + sizeof(struct btrfs_item)) { btrfs_block_release(root, t); @@ -999,8 +1004,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root push_space = btrfs_item_offset(right->items + i); } - BUG_ON(list_empty(&t->dirty)); - BUG_ON(list_empty(&right_buf->dirty)); + BUG_ON(!buffer_dirty(t)); + BUG_ON(!buffer_dirty(right_buf)); wret = fixup_low_keys(trans, root, path, &right->items[0].key, 1); if (wret) @@ -1029,13 +1034,13 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size) { - struct btrfs_buffer *l_buf; + struct buffer_head *l_buf; struct btrfs_leaf *l; u32 nritems; int mid; int slot; struct btrfs_leaf *right; - struct btrfs_buffer *right_buffer; + struct buffer_head *right_buffer; int space_needed = data_size + sizeof(struct btrfs_item); int data_copy_size; int rt_data_off; @@ -1053,7 +1058,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root return wret; } l_buf = path->nodes[0]; - l = &l_buf->leaf; + l = btrfs_buffer_leaf(l_buf); /* did the pushes work? */ if (btrfs_leaf_free_space(root, l) >= @@ -1071,7 +1076,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root right_buffer = btrfs_alloc_free_block(trans, root); BUG_ON(!right_buffer); BUG_ON(mid == nritems); - right = &right_buffer->leaf; + right = btrfs_buffer_leaf(right_buffer); memset(&right->header, 0, sizeof(right->header)); if (mid <= slot) { /* FIXME, just alloc a new leaf here */ @@ -1085,10 +1090,10 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root BUG(); } btrfs_set_header_nritems(&right->header, nritems - mid); - btrfs_set_header_blocknr(&right->header, right_buffer->blocknr); + btrfs_set_header_blocknr(&right->header, right_buffer->b_blocknr); btrfs_set_header_level(&right->header, 0); btrfs_set_header_parentid(&right->header, - btrfs_header_parentid(&root->node->node.header)); + btrfs_header_parentid(btrfs_buffer_header(root->node))); data_copy_size = btrfs_item_end(l->items + mid) - leaf_data_end(root, l); memcpy(right->items, l->items + mid, @@ -1107,11 +1112,11 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_set_header_nritems(&l->header, mid); ret = 0; wret = insert_ptr(trans, root, path, &right->items[0].key, - right_buffer->blocknr, path->slots[1] + 1, 1); + right_buffer->b_blocknr, path->slots[1] + 1, 1); if (wret) ret = wret; - BUG_ON(list_empty(&right_buffer->dirty)); - BUG_ON(list_empty(&l_buf->dirty)); + BUG_ON(!buffer_dirty(right_buffer)); + BUG_ON(!buffer_dirty(l_buf)); BUG_ON(path->slots[0] != slot); if (mid <= slot) { btrfs_block_release(root, path->nodes[0]); @@ -1136,7 +1141,7 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root int slot; int slot_orig; struct btrfs_leaf *leaf; - struct btrfs_buffer *leaf_buf; + struct buffer_head *leaf_buf; u32 nritems; unsigned int data_end; struct btrfs_disk_key disk_key; @@ -1156,7 +1161,7 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root slot_orig = path->slots[0]; leaf_buf = path->nodes[0]; - leaf = &leaf_buf->leaf; + leaf = btrfs_buffer_leaf(leaf_buf); nritems = btrfs_header_nritems(&leaf->header); data_end = leaf_data_end(root, leaf); @@ -1202,7 +1207,7 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root if (slot == 0) ret = fixup_low_keys(trans, root, path, &disk_key, 1); - BUG_ON(list_empty(&leaf_buf->dirty)); + BUG_ON(!buffer_dirty(leaf_buf)); if (btrfs_leaf_free_space(root, leaf) < 0) BUG(); check_leaf(root, path, 0); @@ -1225,7 +1230,8 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_init_path(&path); ret = btrfs_insert_empty_item(trans, root, &path, cpu_key, data_size); if (!ret) { - ptr = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], u8); + ptr = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), + path.slots[0], u8); memcpy(ptr, data, data_size); } btrfs_release_path(root, &path); @@ -1243,12 +1249,12 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level, int slot) { struct btrfs_node *node; - struct btrfs_buffer *parent = path->nodes[level]; + struct buffer_head *parent = path->nodes[level]; u32 nritems; int ret = 0; int wret; - node = &parent->node; + node = btrfs_buffer_node(parent); nritems = btrfs_header_nritems(&node->header); if (slot != nritems -1) { memmove(node->ptrs + slot, node->ptrs + slot + 1, @@ -1257,16 +1263,17 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, nritems--; btrfs_set_header_nritems(&node->header, nritems); if (nritems == 0 && parent == root->node) { - BUG_ON(btrfs_header_level(&root->node->node.header) != 1); + struct btrfs_header *header = btrfs_buffer_header(root->node); + BUG_ON(btrfs_header_level(header) != 1); /* just turn the root into a leaf and break */ - btrfs_set_header_level(&root->node->node.header, 0); + btrfs_set_header_level(header, 0); } else if (slot == 0) { wret = fixup_low_keys(trans, root, path, &node->ptrs[0].key, level + 1); if (wret) ret = wret; } - BUG_ON(list_empty(&parent->dirty)); + BUG_ON(!buffer_dirty(parent)); return ret; } @@ -1279,7 +1286,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, { int slot; struct btrfs_leaf *leaf; - struct btrfs_buffer *leaf_buf; + struct buffer_head *leaf_buf; int doff; int dsize; int ret = 0; @@ -1287,7 +1294,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, u32 nritems; leaf_buf = path->nodes[0]; - leaf = &leaf_buf->leaf; + leaf = btrfs_buffer_leaf(leaf_buf); slot = path->slots[0]; doff = btrfs_item_offset(leaf->items + slot); dsize = btrfs_item_size(leaf->items + slot); @@ -1313,14 +1320,13 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (nritems == 0) { if (leaf_buf == root->node) { btrfs_set_header_level(&leaf->header, 0); - BUG_ON(list_empty(&leaf_buf->dirty)); } else { clean_tree_block(trans, root, leaf_buf); wret = del_ptr(trans, root, path, 1, path->slots[1]); if (wret) ret = wret; wret = btrfs_free_extent(trans, root, - leaf_buf->blocknr, 1, 1); + leaf_buf->b_blocknr, 1, 1); if (wret) ret = wret; } @@ -1332,7 +1338,6 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (wret) ret = wret; } - BUG_ON(list_empty(&leaf_buf->dirty)); /* delete the leaf if it is mostly empty */ if (used < BTRFS_LEAF_DATA_SIZE(root) / 3) { @@ -1341,7 +1346,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, * for possible call to del_ptr below */ slot = path->slots[1]; - leaf_buf->count++; + get_bh(leaf_buf); wret = push_leaf_left(trans, root, path, 1); if (wret < 0) ret = wret; @@ -1352,7 +1357,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, ret = wret; } if (btrfs_header_nritems(&leaf->header) == 0) { - u64 blocknr = leaf_buf->blocknr; + u64 blocknr = leaf_buf->b_blocknr; clean_tree_block(trans, root, leaf_buf); wret = del_ptr(trans, root, path, 1, slot); if (wret) @@ -1380,19 +1385,21 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path) int slot; int level = 1; u64 blocknr; - struct btrfs_buffer *c; - struct btrfs_buffer *next = NULL; + struct buffer_head *c; + struct btrfs_node *c_node; + struct buffer_head *next = NULL; while(level < BTRFS_MAX_LEVEL) { if (!path->nodes[level]) return 1; slot = path->slots[level] + 1; c = path->nodes[level]; - if (slot >= btrfs_header_nritems(&c->node.header)) { + c_node = btrfs_buffer_node(c); + if (slot >= btrfs_header_nritems(&c_node->header)) { level++; continue; } - blocknr = btrfs_node_blockptr(&c->node, slot); + blocknr = btrfs_node_blockptr(c_node, slot); if (next) btrfs_block_release(root, next); next = read_tree_block(root, blocknr); @@ -1408,7 +1415,7 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path) if (!level) break; next = read_tree_block(root, - btrfs_node_blockptr(&next->node, 0)); + btrfs_node_blockptr(btrfs_buffer_node(next), 0)); } return 0; } -- cgit v1.2.3