Merge branch 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Pull btrfs updates from Chris Mason:
 "This is a big variety of fixes and cleanups.

  Liu Bo continues to fixup fuzzer related problems, and some of Josef's
  cleanups are prep for his bigger extent buffer changes (slated for
  v4.10)"

* 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (39 commits)
  Revert "btrfs: let btrfs_delete_unused_bgs() to clean relocated bgs"
  Btrfs: remove unnecessary btrfs_mark_buffer_dirty in split_leaf
  Btrfs: don't BUG() during drop snapshot
  btrfs: fix btrfs_no_printk stub helper
  Btrfs: memset to avoid stale content in btree leaf
  btrfs: parent_start initialization cleanup
  btrfs: Remove already completed TODO comment
  btrfs: Do not reassign count in btrfs_run_delayed_refs
  btrfs: fix a possible umount deadlock
  Btrfs: fix memory leak in do_walk_down
  btrfs: btrfs_debug should consume fs_info when DEBUG is not defined
  btrfs: convert send's verbose_printk to btrfs_debug
  btrfs: convert pr_* to btrfs_* where possible
  btrfs: convert printk(KERN_* to use pr_* calls
  btrfs: unsplit printed strings
  btrfs: clean the old superblocks before freeing the device
  Btrfs: kill BUG_ON in run_delayed_tree_ref
  Btrfs: don't leak reloc root nodes on error
  btrfs: squash lines for simple wrapper functions
  Btrfs: improve check_node to avoid reading corrupted nodes
  ...

43 files changed, 1563 insertions, 1071 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 455a6b2fd539..85dc7ab8f89e 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -17,6 +17,7 @@
  */
 
 #include <linux/vmalloc.h>
+#include <linux/rbtree.h>
 #include "ctree.h"
 #include "disk-io.h"
 #include "backref.h"
@@ -34,6 +35,265 @@ struct extent_inode_elem {
 	struct extent_inode_elem *next;
 };
 
+/*
+ * ref_root is used as the root of the ref tree that hold a collection
+ * of unique references.
+ */
+struct ref_root {
+	struct rb_root rb_root;
+
+	/*
+	 * The unique_refs represents the number of ref_nodes with a positive
+	 * count stored in the tree. Even if a ref_node (the count is greater
+	 * than one) is added, the unique_refs will only increase by one.
+	 */
+	unsigned int unique_refs;
+};
+
+/* ref_node is used to store a unique reference to the ref tree. */
+struct ref_node {
+	struct rb_node rb_node;
+
+	/* For NORMAL_REF, otherwise all these fields should be set to 0 */
+	u64 root_id;
+	u64 object_id;
+	u64 offset;
+
+	/* For SHARED_REF, otherwise parent field should be set to 0 */
+	u64 parent;
+
+	/* Ref to the ref_mod of btrfs_delayed_ref_node */
+	int ref_mod;
+};
+
+/* Dynamically allocate and initialize a ref_root */
+static struct ref_root *ref_root_alloc(void)
+{
+	struct ref_root *ref_tree;
+
+	ref_tree = kmalloc(sizeof(*ref_tree), GFP_NOFS);
+	if (!ref_tree)
+		return NULL;
+
+	ref_tree->rb_root = RB_ROOT;
+	ref_tree->unique_refs = 0;
+
+	return ref_tree;
+}
+
+/* Free all nodes in the ref tree, and reinit ref_root */
+static void ref_root_fini(struct ref_root *ref_tree)
+{
+	struct ref_node *node;
+	struct rb_node *next;
+
+	while ((next = rb_first(&ref_tree->rb_root)) != NULL) {
+		node = rb_entry(next, struct ref_node, rb_node);
+		rb_erase(next, &ref_tree->rb_root);
+		kfree(node);
+	}
+
+	ref_tree->rb_root = RB_ROOT;
+	ref_tree->unique_refs = 0;
+}
+
+static void ref_root_free(struct ref_root *ref_tree)
+{
+	if (!ref_tree)
+		return;
+
+	ref_root_fini(ref_tree);
+	kfree(ref_tree);
+}
+
+/*
+ * Compare ref_node with (root_id, object_id, offset, parent)
+ *
+ * The function compares two ref_node a and b. It returns an integer less
+ * than, equal to, or greater than zero , respectively, to be less than, to
+ * equal, or be greater than b.
+ */
+static int ref_node_cmp(struct ref_node *a, struct ref_node *b)
+{
+	if (a->root_id < b->root_id)
+		return -1;
+	else if (a->root_id > b->root_id)
+		return 1;
+
+	if (a->object_id < b->object_id)
+		return -1;
+	else if (a->object_id > b->object_id)
+		return 1;
+
+	if (a->offset < b->offset)
+		return -1;
+	else if (a->offset > b->offset)
+		return 1;
+
+	if (a->parent < b->parent)
+		return -1;
+	else if (a->parent > b->parent)
+		return 1;
+
+	return 0;
+}
+
+/*
+ * Search ref_node with (root_id, object_id, offset, parent) in the tree
+ *
+ * if found, the pointer of the ref_node will be returned;
+ * if not found, NULL will be returned and pos will point to the rb_node for
+ * insert, pos_parent will point to pos'parent for insert;
+*/
+static struct ref_node *__ref_tree_search(struct ref_root *ref_tree,
+					  struct rb_node ***pos,
+					  struct rb_node **pos_parent,
+					  u64 root_id, u64 object_id,
+					  u64 offset, u64 parent)
+{
+	struct ref_node *cur = NULL;
+	struct ref_node entry;
+	int ret;
+
+	entry.root_id = root_id;
+	entry.object_id = object_id;
+	entry.offset = offset;
+	entry.parent = parent;
+
+	*pos = &ref_tree->rb_root.rb_node;
+
+	while (**pos) {
+		*pos_parent = **pos;
+		cur = rb_entry(*pos_parent, struct ref_node, rb_node);
+
+		ret = ref_node_cmp(cur, &entry);
+		if (ret > 0)
+			*pos = &(**pos)->rb_left;
+		else if (ret < 0)
+			*pos = &(**pos)->rb_right;
+		else
+			return cur;
+	}
+
+	return NULL;
+}
+
+/*
+ * Insert a ref_node to the ref tree
+ * @pos used for specifiy the position to insert
+ * @pos_parent for specifiy pos's parent
+ *
+ * success, return 0;
+ * ref_node already exists, return -EEXIST;
+*/
+static int ref_tree_insert(struct ref_root *ref_tree, struct rb_node **pos,
+			   struct rb_node *pos_parent, struct ref_node *ins)
+{
+	struct rb_node **p = NULL;
+	struct rb_node *parent = NULL;
+	struct ref_node *cur = NULL;
+
+	if (!pos) {
+		cur = __ref_tree_search(ref_tree, &p, &parent, ins->root_id,
+					ins->object_id, ins->offset,
+					ins->parent);
+		if (cur)
+			return -EEXIST;
+	} else {
+		p = pos;
+		parent = pos_parent;
+	}
+
+	rb_link_node(&ins->rb_node, parent, p);
+	rb_insert_color(&ins->rb_node, &ref_tree->rb_root);
+
+	return 0;
+}
+
+/* Erase and free ref_node, caller should update ref_root->unique_refs */
+static void ref_tree_remove(struct ref_root *ref_tree, struct ref_node *node)
+{
+	rb_erase(&node->rb_node, &ref_tree->rb_root);
+	kfree(node);
+}
+
+/*
+ * Update ref_root->unique_refs
+ *
+ * Call __ref_tree_search
+ *	1. if ref_node doesn't exist, ref_tree_insert this node, and update
+ *	ref_root->unique_refs:
+ *		if ref_node->ref_mod > 0, ref_root->unique_refs++;
+ *		if ref_node->ref_mod < 0, do noting;
+ *
+ *	2. if ref_node is found, then get origin ref_node->ref_mod, and update
+ *	ref_node->ref_mod.
+ *		if ref_node->ref_mod is equal to 0,then call ref_tree_remove
+ *
+ *		according to origin_mod and new_mod, update ref_root->items
+ *		+----------------+--------------+-------------+
+ *		|		 |new_count <= 0|new_count > 0|
+ *		+----------------+--------------+-------------+
+ *		|origin_count < 0|       0      |      1      |
+ *		+----------------+--------------+-------------+
+ *		|origin_count > 0|      -1      |      0      |
+ *		+----------------+--------------+-------------+
+ *
+ * In case of allocation failure, -ENOMEM is returned and the ref_tree stays
+ * unaltered.
+ * Success, return 0
+ */
+static int ref_tree_add(struct ref_root *ref_tree, u64 root_id, u64 object_id,
+			u64 offset, u64 parent, int count)
+{
+	struct ref_node *node = NULL;
+	struct rb_node **pos = NULL;
+	struct rb_node *pos_parent = NULL;
+	int origin_count;
+	int ret;
+
+	if (!count)
+		return 0;
+
+	node = __ref_tree_search(ref_tree, &pos, &pos_parent, root_id,
+				 object_id, offset, parent);
+	if (node == NULL) {
+		node = kmalloc(sizeof(*node), GFP_NOFS);
+		if (!node)
+			return -ENOMEM;
+
+		node->root_id = root_id;
+		node->object_id = object_id;
+		node->offset = offset;
+		node->parent = parent;
+		node->ref_mod = count;
+
+		ret = ref_tree_insert(ref_tree, pos, pos_parent, node);
+		ASSERT(!ret);
+		if (ret) {
+			kfree(node);
+			return ret;
+		}
+
+		ref_tree->unique_refs += node->ref_mod > 0 ? 1 : 0;
+
+		return 0;
+	}
+
+	origin_count = node->ref_mod;
+	node->ref_mod += count;
+
+	if (node->ref_mod > 0)
+		ref_tree->unique_refs += origin_count > 0 ? 0 : 1;
+	else if (node->ref_mod <= 0)
+		ref_tree->unique_refs += origin_count > 0 ? -1 : 0;
+
+	if (!node->ref_mod)
+		ref_tree_remove(ref_tree, node);
+
+	return 0;
+}
+
 static int check_extent_in_eb(struct btrfs_key *key, struct extent_buffer *eb,
 				struct btrfs_file_extent_item *fi,
 				u64 extent_item_pos,
@@ -390,8 +650,8 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 	/* root node has been locked, we can release @subvol_srcu safely here */
 	srcu_read_unlock(&fs_info->subvol_srcu, index);
 
-	pr_debug("search slot in root %llu (level %d, ref count %d) returned "
-		 "%d for key (%llu %u %llu)\n",
+	btrfs_debug(fs_info,
+		"search slot in root %llu (level %d, ref count %d) returned %d for key (%llu %u %llu)",
 		 ref->root_id, level, ref->count, ret,
 		 ref->key_for_search.objectid, ref->key_for_search.type,
 		 ref->key_for_search.offset);
@@ -700,6 +960,7 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq,
 static int __add_inline_refs(struct btrfs_fs_info *fs_info,
 			     struct btrfs_path *path, u64 bytenr,
 			     int *info_level, struct list_head *prefs,
+			     struct ref_root *ref_tree,
 			     u64 *total_refs, u64 inum)
 {
 	int ret = 0;
@@ -767,6 +1028,13 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
 			count = btrfs_shared_data_ref_count(leaf, sdref);
 			ret = __add_prelim_ref(prefs, 0, NULL, 0, offset,
 					       bytenr, count, GFP_NOFS);
+			if (ref_tree) {
+				if (!ret)
+					ret = ref_tree_add(ref_tree, 0, 0, 0,
+							   bytenr, count);
+				if (!ret && ref_tree->unique_refs > 1)
+					ret = BACKREF_FOUND_SHARED;
+			}
 			break;
 		}
 		case BTRFS_TREE_BLOCK_REF_KEY:
@@ -794,6 +1062,15 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
 			root = btrfs_extent_data_ref_root(leaf, dref);
 			ret = __add_prelim_ref(prefs, root, &key, 0, 0,
 					       bytenr, count, GFP_NOFS);
+			if (ref_tree) {
+				if (!ret)
+					ret = ref_tree_add(ref_tree, root,
+							   key.objectid,
+							   key.offset, 0,
+							   count);
+				if (!ret && ref_tree->unique_refs > 1)
+					ret = BACKREF_FOUND_SHARED;
+			}
 			break;
 		}
 		default:
@@ -812,7 +1089,8 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
  */
 static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
 			    struct btrfs_path *path, u64 bytenr,
-			    int info_level, struct list_head *prefs, u64 inum)
+			    int info_level, struct list_head *prefs,
+			    struct ref_root *ref_tree, u64 inum)
 {
 	struct btrfs_root *extent_root = fs_info->extent_root;
 	int ret;
@@ -855,6 +1133,13 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
 			count = btrfs_shared_data_ref_count(leaf, sdref);
 			ret = __add_prelim_ref(prefs, 0, NULL, 0, key.offset,
 						bytenr, count, GFP_NOFS);
+			if (ref_tree) {
+				if (!ret)
+					ret = ref_tree_add(ref_tree, 0, 0, 0,
+							   bytenr, count);
+				if (!ret && ref_tree->unique_refs > 1)
+					ret = BACKREF_FOUND_SHARED;
+			}
 			break;
 		}
 		case BTRFS_TREE_BLOCK_REF_KEY:
@@ -883,6 +1168,15 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
 			root = btrfs_extent_data_ref_root(leaf, dref);
 			ret = __add_prelim_ref(prefs, root, &key, 0, 0,
 					       bytenr, count, GFP_NOFS);
+			if (ref_tree) {
+				if (!ret)
+					ret = ref_tree_add(ref_tree, root,
+							   key.objectid,
+							   key.offset, 0,
+							   count);
+				if (!ret && ref_tree->unique_refs > 1)
+					ret = BACKREF_FOUND_SHARED;
+			}
 			break;
 		}
 		default:
@@ -909,13 +1203,16 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
  * commit root.
  * The special case is for qgroup to search roots in commit_transaction().
  *
+ * If check_shared is set to 1, any extent has more than one ref item, will
+ * be returned BACKREF_FOUND_SHARED immediately.
+ *
  * FIXME some caching might speed things up
  */
 static int find_parent_nodes(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info, u64 bytenr,
 			     u64 time_seq, struct ulist *refs,
 			     struct ulist *roots, const u64 *extent_item_pos,
-			     u64 root_objectid, u64 inum)
+			     u64 root_objectid, u64 inum, int check_shared)
 {
 	struct btrfs_key key;
 	struct btrfs_path *path;
@@ -927,6 +1224,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
 	struct list_head prefs;
 	struct __prelim_ref *ref;
 	struct extent_inode_elem *eie = NULL;
+	struct ref_root *ref_tree = NULL;
 	u64 total_refs = 0;
 
 	INIT_LIST_HEAD(&prefs);
@@ -958,6 +1256,18 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
 again:
 	head = NULL;
 
+	if (check_shared) {
+		if (!ref_tree) {
+			ref_tree = ref_root_alloc();
+			if (!ref_tree) {
+				ret = -ENOMEM;
+				goto out;
+			}
+		} else {
+			ref_root_fini(ref_tree);
+		}
+	}
+
 	ret = btrfs_search_slot(trans, fs_info->extent_root, &key, path, 0, 0);
 	if (ret < 0)
 		goto out;
@@ -1002,6 +1312,36 @@ again:
 		} else {
 			spin_unlock(&delayed_refs->lock);
 		}
+
+		if (check_shared && !list_empty(&prefs_delayed)) {
+			/*
+			 * Add all delay_ref to the ref_tree and check if there
+			 * are multiple ref items added.
+			 */
+			list_for_each_entry(ref, &prefs_delayed, list) {
+				if (ref->key_for_search.type) {
+					ret = ref_tree_add(ref_tree,
+						ref->root_id,
+						ref->key_for_search.objectid,
+						ref->key_for_search.offset,
+						0, ref->count);
+					if (ret)
+						goto out;
+				} else {
+					ret = ref_tree_add(ref_tree, 0, 0, 0,
+						     ref->parent, ref->count);
+					if (ret)
+						goto out;
+				}
+
+			}
+
+			if (ref_tree->unique_refs > 1) {
+				ret = BACKREF_FOUND_SHARED;
+				goto out;
+			}
+
+		}
 	}
 
 	if (path->slots[0]) {
@@ -1017,11 +1357,13 @@ again:
 		     key.type == BTRFS_METADATA_ITEM_KEY)) {
 			ret = __add_inline_refs(fs_info, path, bytenr,
 						&info_level, &prefs,
-						&total_refs, inum);
+						ref_tree, &total_refs,
+						inum);
 			if (ret)
 				goto out;
 			ret = __add_keyed_refs(fs_info, path, bytenr,
-					       info_level, &prefs, inum);
+					       info_level, &prefs,
+					       ref_tree, inum);
 			if (ret)
 				goto out;
 		}
@@ -1106,6 +1448,7 @@ again:
 
 out:
 	btrfs_free_path(path);
+	ref_root_free(ref_tree);
 	while (!list_empty(&prefs)) {
 		ref = list_first_entry(&prefs, struct __prelim_ref, list);
 		list_del(&ref->list);
@@ -1159,8 +1502,8 @@ static int btrfs_find_all_leafs(struct btrfs_trans_handle *trans,
 	if (!*leafs)
 		return -ENOMEM;
 
-	ret = find_parent_nodes(trans, fs_info, bytenr,
-				time_seq, *leafs, NULL, extent_item_pos, 0, 0);
+	ret = find_parent_nodes(trans, fs_info, bytenr, time_seq,
+				*leafs, NULL, extent_item_pos, 0, 0, 0);
 	if (ret < 0 && ret != -ENOENT) {
 		free_leaf_list(*leafs);
 		return ret;
@@ -1202,8 +1545,8 @@ static int __btrfs_find_all_roots(struct btrfs_trans_handle *trans,
 
 	ULIST_ITER_INIT(&uiter);
 	while (1) {
-		ret = find_parent_nodes(trans, fs_info, bytenr,
-					time_seq, tmp, *roots, NULL, 0, 0);
+		ret = find_parent_nodes(trans, fs_info, bytenr, time_seq,
+					tmp, *roots, NULL, 0, 0, 0);
 		if (ret < 0 && ret != -ENOENT) {
 			ulist_free(tmp);
 			ulist_free(*roots);
@@ -1273,7 +1616,7 @@ int btrfs_check_shared(struct btrfs_trans_handle *trans,
 	ULIST_ITER_INIT(&uiter);
 	while (1) {
 		ret = find_parent_nodes(trans, fs_info, bytenr, elem.seq, tmp,
-					roots, NULL, root_objectid, inum);
+					roots, NULL, root_objectid, inum, 1);
 		if (ret == BACKREF_FOUND_SHARED) {
 			/* this is the only condition under which we return 1 */
 			ret = 1;
@@ -1492,7 +1835,8 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 
 	if (found_key->objectid > logical ||
 	    found_key->objectid + size <= logical) {
-		pr_debug("logical %llu is not within any extent\n", logical);
+		btrfs_debug(fs_info,
+			"logical %llu is not within any extent", logical);
 		return -ENOENT;
 	}
 
@@ -1503,8 +1847,8 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 	ei = btrfs_item_ptr(eb, path->slots[0], struct btrfs_extent_item);
 	flags = btrfs_extent_flags(eb, ei);
 
-	pr_debug("logical %llu is at position %llu within the extent (%llu "
-		 "EXTENT_ITEM %llu) flags %#llx size %u\n",
+	btrfs_debug(fs_info,
+		"logical %llu is at position %llu within the extent (%llu EXTENT_ITEM %llu) flags %#llx size %u",
 		 logical, logical - found_key->objectid, found_key->objectid,
 		 found_key->offset, flags, item_size);
 
@@ -1625,21 +1969,24 @@ int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
 	return 0;
 }
 
-static int iterate_leaf_refs(struct extent_inode_elem *inode_list,
-				u64 root, u64 extent_item_objectid,
-				iterate_extent_inodes_t *iterate, void *ctx)
+static int iterate_leaf_refs(struct btrfs_fs_info *fs_info,
+			     struct extent_inode_elem *inode_list,
+			     u64 root, u64 extent_item_objectid,
+			     iterate_extent_inodes_t *iterate, void *ctx)
 {
 	struct extent_inode_elem *eie;
 	int ret = 0;
 
 	for (eie = inode_list; eie; eie = eie->next) {
-		pr_debug("ref for %llu resolved, key (%llu EXTEND_DATA %llu), "
-			 "root %llu\n", extent_item_objectid,
-			 eie->inum, eie->offset, root);
+		btrfs_debug(fs_info,
+			    "ref for %llu resolved, key (%llu EXTEND_DATA %llu), root %llu",
+			    extent_item_objectid, eie->inum,
+			    eie->offset, root);
 		ret = iterate(eie->inum, eie->offset, root, ctx);
 		if (ret) {
-			pr_debug("stopping iteration for %llu due to ret=%d\n",
-				 extent_item_objectid, ret);
+			btrfs_debug(fs_info,
+				    "stopping iteration for %llu due to ret=%d",
+				    extent_item_objectid, ret);
 			break;
 		}
 	}
@@ -1667,7 +2014,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 	struct ulist_iterator ref_uiter;
 	struct ulist_iterator root_uiter;
 
-	pr_debug("resolving all inodes for extent %llu\n",
+	btrfs_debug(fs_info, "resolving all inodes for extent %llu",
 			extent_item_objectid);
 
 	if (!search_commit_root) {
@@ -1693,10 +2040,12 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 			break;
 		ULIST_ITER_INIT(&root_uiter);
 		while (!ret && (root_node = ulist_next(roots, &root_uiter))) {
-			pr_debug("root %llu references leaf %llu, data list "
-				 "%#llx\n", root_node->val, ref_node->val,
-				 ref_node->aux);
-			ret = iterate_leaf_refs((struct extent_inode_elem *)
+			btrfs_debug(fs_info,
+				    "root %llu references leaf %llu, data list %#llx",
+				    root_node->val, ref_node->val,
+				    ref_node->aux);
+			ret = iterate_leaf_refs(fs_info,
+						(struct extent_inode_elem *)
 						(uintptr_t)ref_node->aux,
 						root_node->val,
 						extent_item_objectid,
@@ -1792,9 +2141,9 @@ static int iterate_inode_refs(u64 inum, struct btrfs_root *fs_root,
 		for (cur = 0; cur < btrfs_item_size(eb, item); cur += len) {
 			name_len = btrfs_inode_ref_name_len(eb, iref);
 			/* path must be released before calling iterate()! */
-			pr_debug("following ref at offset %u for inode %llu in "
-				 "tree %llu\n", cur, found_key.objectid,
-				 fs_root->objectid);
+			btrfs_debug(fs_root->fs_info,
+				"following ref at offset %u for inode %llu in tree %llu",
+				cur, found_key.objectid, fs_root->objectid);
 			ret = iterate(parent, name_len,
 				      (unsigned long)(iref + 1), eb, ctx);
 			if (ret)
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 4919aedb5fc1..1a8fa46ff87e 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -44,17 +44,6 @@
 #define BTRFS_INODE_IN_DELALLOC_LIST		9
 #define BTRFS_INODE_READDIO_NEED_LOCK		10
 #define BTRFS_INODE_HAS_PROPS		        11
-/*
- * The following 3 bits are meant only for the btree inode.
- * When any of them is set, it means an error happened while writing an
- * extent buffer belonging to:
- * 1) a non-log btree
- * 2) a log btree and first log sub-transaction
- * 3) a log btree and second log sub-transaction
- */
-#define BTRFS_INODE_BTREE_ERR		        12
-#define BTRFS_INODE_BTREE_LOG1_ERR		13
-#define BTRFS_INODE_BTREE_LOG2_ERR		14
 
 /* in memory btrfs inode */
 struct btrfs_inode {
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 66789471b49d..8e99251650b3 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -656,7 +656,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 	BUG_ON(NULL == state);
 	selected_super = kzalloc(sizeof(*selected_super), GFP_NOFS);
 	if (NULL == selected_super) {
-		printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+		pr_info("btrfsic: error, kmalloc failed!\n");
 		return -ENOMEM;
 	}
 
@@ -681,7 +681,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 	}
 
 	if (NULL == state->latest_superblock) {
-		printk(KERN_INFO "btrfsic: no superblock found!\n");
+		pr_info("btrfsic: no superblock found!\n");
 		kfree(selected_super);
 		return -1;
 	}
@@ -698,13 +698,13 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 			next_bytenr = btrfs_super_root(selected_super);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "root@%llu\n", next_bytenr);
+				pr_info("root@%llu\n", next_bytenr);
 			break;
 		case 1:
 			next_bytenr = btrfs_super_chunk_root(selected_super);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "chunk@%llu\n", next_bytenr);
+				pr_info("chunk@%llu\n", next_bytenr);
 			break;
 		case 2:
 			next_bytenr = btrfs_super_log_root(selected_super);
@@ -712,7 +712,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 				continue;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "log@%llu\n", next_bytenr);
+				pr_info("log@%llu\n", next_bytenr);
 			break;
 		}
 
@@ -720,7 +720,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
@@ -733,9 +733,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 						&tmp_next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO "btrfsic:"
-				       " btrfsic_map_block(root @%llu,"
-				       " mirror %d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(root @%llu, mirror %d) failed!\n",
 				       next_bytenr, mirror_num);
 				kfree(selected_super);
 				return -1;
@@ -758,8 +756,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 
 			ret = btrfsic_read_block(state, &tmp_next_block_ctx);
 			if (ret < (int)PAGE_SIZE) {
-				printk(KERN_INFO
-				       "btrfsic: read @logical %llu failed!\n",
+				pr_info("btrfsic: read @logical %llu failed!\n",
 				       tmp_next_block_ctx.start);
 				btrfsic_release_block_ctx(&tmp_next_block_ctx);
 				kfree(selected_super);
@@ -820,7 +817,7 @@ static int btrfsic_process_superblock_dev_mirror(
 	if (NULL == superblock_tmp) {
 		superblock_tmp = btrfsic_block_alloc();
 		if (NULL == superblock_tmp) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			brelse(bh);
 			return -1;
 		}
@@ -894,7 +891,7 @@ static int btrfsic_process_superblock_dev_mirror(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			struct btrfsic_block *next_block;
@@ -905,8 +902,7 @@ static int btrfsic_process_superblock_dev_mirror(
 					      state->metablock_size,
 					      &tmp_next_block_ctx,
 					      mirror_num)) {
-				printk(KERN_INFO "btrfsic: btrfsic_map_block("
-				       "bytenr @%llu, mirror %d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(bytenr @%llu, mirror %d) failed!\n",
 				       next_bytenr, mirror_num);
 				brelse(bh);
 				return -1;
@@ -948,7 +944,7 @@ static struct btrfsic_stack_frame *btrfsic_stack_frame_alloc(void)
 
 	sf = kzalloc(sizeof(*sf), GFP_NOFS);
 	if (NULL == sf)
-		printk(KERN_INFO "btrfsic: alloc memory failed!\n");
+		pr_info("btrfsic: alloc memory failed!\n");
 	else
 		sf->magic = BTRFSIC_BLOCK_STACK_FRAME_MAGIC_NUMBER;
 	return sf;
@@ -994,9 +990,7 @@ continue_with_new_stack_frame:
 			sf->nr = btrfs_stack_header_nritems(&leafhdr->header);
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "leaf %llu items %d generation %llu"
-				       " owner %llu\n",
+				pr_info("leaf %llu items %d generation %llu owner %llu\n",
 				       sf->block_ctx->start, sf->nr,
 				       btrfs_stack_header_generation(
 					       &leafhdr->header),
@@ -1023,8 +1017,7 @@ continue_with_current_leaf_stack_frame:
 			if (disk_item_offset + sizeof(struct btrfs_item) >
 			    sf->block_ctx->len) {
 leaf_item_out_of_bounce_error:
-				printk(KERN_INFO
-				       "btrfsic: leaf item out of bounce at logical %llu, dev %s\n",
+				pr_info("btrfsic: leaf item out of bounce at logical %llu, dev %s\n",
 				       sf->block_ctx->start,
 				       sf->block_ctx->dev->name);
 				goto one_stack_frame_backwards;
@@ -1120,8 +1113,7 @@ leaf_item_out_of_bounce_error:
 			sf->nr = btrfs_stack_header_nritems(&nodehdr->header);
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "node %llu level %d items %d"
-				       " generation %llu owner %llu\n",
+				pr_info("node %llu level %d items %d generation %llu owner %llu\n",
 				       sf->block_ctx->start,
 				       nodehdr->header.level, sf->nr,
 				       btrfs_stack_header_generation(
@@ -1145,8 +1137,7 @@ continue_with_current_node_stack_frame:
 					  (uintptr_t)nodehdr;
 			if (key_ptr_offset + sizeof(struct btrfs_key_ptr) >
 			    sf->block_ctx->len) {
-				printk(KERN_INFO
-				       "btrfsic: node item out of bounce at logical %llu, dev %s\n",
+				pr_info("btrfsic: node item out of bounce at logical %llu, dev %s\n",
 				       sf->block_ctx->start,
 				       sf->block_ctx->dev->name);
 				goto one_stack_frame_backwards;
@@ -1275,7 +1266,7 @@ static int btrfsic_create_link_to_next_block(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->metablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, *num_copiesp);
 		*mirror_nump = 1;
 	}
@@ -1284,15 +1275,13 @@ static int btrfsic_create_link_to_next_block(
 		return 0;
 
 	if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-		printk(KERN_INFO
-		       "btrfsic_create_link_to_next_block(mirror_num=%d)\n",
+		pr_info("btrfsic_create_link_to_next_block(mirror_num=%d)\n",
 		       *mirror_nump);
 	ret = btrfsic_map_block(state, next_bytenr,
 				state->metablock_size,
 				next_block_ctx, *mirror_nump);
 	if (ret) {
-		printk(KERN_INFO
-		       "btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
+		pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 		       next_bytenr, *mirror_nump);
 		btrfsic_release_block_ctx(next_block_ctx);
 		*next_blockp = NULL;
@@ -1318,16 +1307,14 @@ static int btrfsic_create_link_to_next_block(
 			if (next_block->logical_bytenr != next_bytenr &&
 			    !(!next_block->is_metadata &&
 			      0 == next_block->logical_bytenr))
-				printk(KERN_INFO
-				       "Referenced block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+				pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
 				       next_bytenr, next_block_ctx->dev->name,
 				       next_block_ctx->dev_bytenr, *mirror_nump,
 				       btrfsic_get_block_type(state,
 							      next_block),
 				       next_block->logical_bytenr);
 			else
-				printk(KERN_INFO
-				       "Referenced block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+				pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 				       next_bytenr, next_block_ctx->dev->name,
 				       next_block_ctx->dev_bytenr, *mirror_nump,
 				       btrfsic_get_block_type(state,
@@ -1348,7 +1335,7 @@ static int btrfsic_create_link_to_next_block(
 	if (NULL == l) {
 		l = btrfsic_block_link_alloc();
 		if (NULL == l) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			btrfsic_release_block_ctx(next_block_ctx);
 			*next_blockp = NULL;
 			return -1;
@@ -1381,8 +1368,7 @@ static int btrfsic_create_link_to_next_block(
 	if (limit_nesting > 0 && did_alloc_block_link) {
 		ret = btrfsic_read_block(state, next_block_ctx);
 		if (ret < (int)next_block_ctx->len) {
-			printk(KERN_INFO
-			       "btrfsic: read block @logical %llu failed!\n",
+			pr_info("btrfsic: read block @logical %llu failed!\n",
 			       next_bytenr);
 			btrfsic_release_block_ctx(next_block_ctx);
 			*next_blockp = NULL;
@@ -1417,8 +1403,7 @@ static int btrfsic_handle_extent_data(
 	if (file_extent_item_offset +
 	    offsetof(struct btrfs_file_extent_item, disk_num_bytes) >
 	    block_ctx->len) {
-		printk(KERN_INFO
-		       "btrfsic: file item out of bounce at logical %llu, dev %s\n",
+		pr_info("btrfsic: file item out of bounce at logical %llu, dev %s\n",
 		       block_ctx->start, block_ctx->dev->name);
 		return -1;
 	}
@@ -1429,7 +1414,7 @@ static int btrfsic_handle_extent_data(
 	if (BTRFS_FILE_EXTENT_REG != file_extent_item.type ||
 	    btrfs_stack_file_extent_disk_bytenr(&file_extent_item) == 0) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-			printk(KERN_INFO "extent_data: type %u, disk_bytenr = %llu\n",
+			pr_info("extent_data: type %u, disk_bytenr = %llu\n",
 			       file_extent_item.type,
 			       btrfs_stack_file_extent_disk_bytenr(
 			       &file_extent_item));
@@ -1438,8 +1423,7 @@ static int btrfsic_handle_extent_data(
 
 	if (file_extent_item_offset + sizeof(struct btrfs_file_extent_item) >
 	    block_ctx->len) {
-		printk(KERN_INFO
-		       "btrfsic: file item out of bounce at logical %llu, dev %s\n",
+		pr_info("btrfsic: file item out of bounce at logical %llu, dev %s\n",
 		       block_ctx->start, block_ctx->dev->name);
 		return -1;
 	}
@@ -1457,8 +1441,7 @@ static int btrfsic_handle_extent_data(
 	generation = btrfs_stack_file_extent_generation(&file_extent_item);
 
 	if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-		printk(KERN_INFO "extent_data: type %u, disk_bytenr = %llu,"
-		       " offset = %llu, num_bytes = %llu\n",
+		pr_info("extent_data: type %u, disk_bytenr = %llu, offset = %llu, num_bytes = %llu\n",
 		       file_extent_item.type,
 		       btrfs_stack_file_extent_disk_bytenr(&file_extent_item),
 		       btrfs_stack_file_extent_offset(&file_extent_item),
@@ -1477,7 +1460,7 @@ static int btrfsic_handle_extent_data(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, state->datablock_size);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			struct btrfsic_block_data_ctx next_block_ctx;
@@ -1485,19 +1468,16 @@ static int btrfsic_handle_extent_data(
 			int block_was_created;
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "btrfsic_handle_extent_data("
-				       "mirror_num=%d)\n", mirror_num);
+				pr_info("btrfsic_handle_extent_data(mirror_num=%d)\n",
+					mirror_num);
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERY_VERBOSE)
-				printk(KERN_INFO
-				       "\tdisk_bytenr = %llu, num_bytes %u\n",
+				pr_info("\tdisk_bytenr = %llu, num_bytes %u\n",
 				       next_bytenr, chunk_len);
 			ret = btrfsic_map_block(state, next_bytenr,
 						chunk_len, &next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_map_block(@%llu,"
-				       " mirror=%d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 				       next_bytenr, mirror_num);
 				return -1;
 			}
@@ -1512,8 +1492,7 @@ static int btrfsic_handle_extent_data(
 					mirror_num,
 					&block_was_created);
 			if (NULL == next_block) {
-				printk(KERN_INFO
-				       "btrfsic: error, kmalloc failed!\n");
+				pr_info("btrfsic: error, kmalloc failed!\n");
 				btrfsic_release_block_ctx(&next_block_ctx);
 				return -1;
 			}
@@ -1523,12 +1502,7 @@ static int btrfsic_handle_extent_data(
 				    next_block->logical_bytenr != next_bytenr &&
 				    !(!next_block->is_metadata &&
 				      0 == next_block->logical_bytenr)) {
-					printk(KERN_INFO
-					       "Referenced block"
-					       " @%llu (%s/%llu/%d)"
-					       " found in hash table, D,"
-					       " bytenr mismatch"
-					       " (!= stored %llu).\n",
+					pr_info("Referenced block @%llu (%s/%llu/%d) found in hash table, D, bytenr mismatch (!= stored %llu).\n",
 					       next_bytenr,
 					       next_block_ctx.dev->name,
 					       next_block_ctx.dev_bytenr,
@@ -1592,7 +1566,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
 	kfree(multi);
 	if (NULL == block_ctx_out->dev) {
 		ret = -ENXIO;
-		printk(KERN_INFO "btrfsic: error, cannot lookup dev (#1)!\n");
+		pr_info("btrfsic: error, cannot lookup dev (#1)!\n");
 	}
 
 	return ret;
@@ -1638,8 +1612,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 	BUG_ON(block_ctx->pagev);
 	BUG_ON(block_ctx->mem_to_free);
 	if (block_ctx->dev_bytenr & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: read_block() with unaligned bytenr %llu\n",
+		pr_info("btrfsic: read_block() with unaligned bytenr %llu\n",
 		       block_ctx->dev_bytenr);
 		return -1;
 	}
@@ -1666,8 +1639,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 
 		bio = btrfs_io_bio_alloc(GFP_NOFS, num_pages - i);
 		if (!bio) {
-			printk(KERN_INFO
-			       "btrfsic: bio_alloc() for %u pages failed!\n",
+			pr_info("btrfsic: bio_alloc() for %u pages failed!\n",
 			       num_pages - i);
 			return -1;
 		}
@@ -1682,13 +1654,11 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 				break;
 		}
 		if (j == i) {
-			printk(KERN_INFO
-			       "btrfsic: error, failed to add a single page!\n");
+			pr_info("btrfsic: error, failed to add a single page!\n");
 			return -1;
 		}
 		if (submit_bio_wait(bio)) {
-			printk(KERN_INFO
-			       "btrfsic: read error at logical %llu dev %s!\n",
+			pr_info("btrfsic: read error at logical %llu dev %s!\n",
 			       block_ctx->start, block_ctx->dev->name);
 			bio_put(bio);
 			return -1;
@@ -1700,7 +1670,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 	for (i = 0; i < num_pages; i++) {
 		block_ctx->datav[i] = kmap(block_ctx->pagev[i]);
 		if (!block_ctx->datav[i]) {
-			printk(KERN_INFO "btrfsic: kmap() failed (dev %s)!\n",
+			pr_info("btrfsic: kmap() failed (dev %s)!\n",
 			       block_ctx->dev->name);
 			return -1;
 		}
@@ -1715,19 +1685,17 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 
 	BUG_ON(NULL == state);
 
-	printk(KERN_INFO "all_blocks_list:\n");
+	pr_info("all_blocks_list:\n");
 	list_for_each_entry(b_all, &state->all_blocks_list, all_blocks_node) {
 		const struct btrfsic_block_link *l;
 
-		printk(KERN_INFO "%c-block @%llu (%s/%llu/%d)\n",
+		pr_info("%c-block @%llu (%s/%llu/%d)\n",
 		       btrfsic_get_block_type(state, b_all),
 		       b_all->logical_bytenr, b_all->dev_state->name,
 		       b_all->dev_bytenr, b_all->mirror_num);
 
 		list_for_each_entry(l, &b_all->ref_to_list, node_ref_to) {
-			printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
-			       " refers %u* to"
-			       " %c @%llu (%s/%llu/%d)\n",
+			pr_info(" %c @%llu (%s/%llu/%d) refers %u* to %c @%llu (%s/%llu/%d)\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num,
@@ -1740,9 +1708,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 		}
 
 		list_for_each_entry(l, &b_all->ref_from_list, node_ref_from) {
-			printk(KERN_INFO " %c @%llu (%s/%llu/%d)"
-			       " is ref %u* from"
-			       " %c @%llu (%s/%llu/%d)\n",
+			pr_info(" %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num,
@@ -1754,7 +1720,7 @@ static void btrfsic_dump_database(struct btrfsic_state *state)
 			       l->block_ref_from->mirror_num);
 		}
 
-		printk(KERN_INFO "\n");
+		pr_info("\n");
 	}
 }
 
@@ -1829,8 +1795,7 @@ again:
 						    mapped_datav[0]);
 			if (num_pages * PAGE_SIZE <
 			    BTRFS_SUPER_INFO_SIZE) {
-				printk(KERN_INFO
-				       "btrfsic: cannot work with too short bios!\n");
+				pr_info("btrfsic: cannot work with too short bios!\n");
 				return;
 			}
 			is_metadata = 1;
@@ -1838,8 +1803,7 @@ again:
 			processed_len = BTRFS_SUPER_INFO_SIZE;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_TREE_BEFORE_SB_WRITE) {
-				printk(KERN_INFO
-				       "[before new superblock is written]:\n");
+				pr_info("[before new superblock is written]:\n");
 				btrfsic_dump_tree_sub(state, block, 0);
 			}
 		}
@@ -1847,8 +1811,7 @@ again:
 			if (!block->is_superblock) {
 				if (num_pages * PAGE_SIZE <
 				    state->metablock_size) {
-					printk(KERN_INFO
-					       "btrfsic: cannot work with too short bios!\n");
+					pr_info("btrfsic: cannot work with too short bios!\n");
 					return;
 				}
 				processed_len = state->metablock_size;
@@ -1863,8 +1826,7 @@ again:
 				if (block->logical_bytenr != bytenr &&
 				    !(!block->is_metadata &&
 				      block->logical_bytenr == 0))
-					printk(KERN_INFO
-					       "Written block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+					pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
 					       bytenr, dev_state->name,
 					       dev_bytenr,
 					       block->mirror_num,
@@ -1872,8 +1834,7 @@ again:
 								      block),
 					       block->logical_bytenr);
 				else
-					printk(KERN_INFO
-					       "Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+					pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 					       bytenr, dev_state->name,
 					       dev_bytenr, block->mirror_num,
 					       btrfsic_get_block_type(state,
@@ -1883,33 +1844,24 @@ again:
 		} else {
 			if (num_pages * PAGE_SIZE <
 			    state->datablock_size) {
-				printk(KERN_INFO
-				       "btrfsic: cannot work with too short bios!\n");
+				pr_info("btrfsic: cannot work with too short bios!\n");
 				return;
 			}
 			processed_len = state->datablock_size;
 			bytenr = block->logical_bytenr;
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "Written block @%llu (%s/%llu/%d)"
-				       " found in hash table, %c.\n",
+				pr_info("Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
 				       bytenr, dev_state->name, dev_bytenr,
 				       block->mirror_num,
 				       btrfsic_get_block_type(state, block));
 		}
 
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "ref_to_list: %cE, ref_from_list: %cE\n",
+			pr_info("ref_to_list: %cE, ref_from_list: %cE\n",
 			       list_empty(&block->ref_to_list) ? ' ' : '!',
 			       list_empty(&block->ref_from_list) ? ' ' : '!');
 		if (btrfsic_is_block_ref_by_superblock(state, block, 0)) {
-			printk(KERN_INFO "btrfs: attempt to overwrite %c-block"
-			       " @%llu (%s/%llu/%d), old(gen=%llu,"
-			       " objectid=%llu, type=%d, offset=%llu),"
-			       " new(gen=%llu),"
-			       " which is referenced by most recent superblock"
-			       " (superblockgen=%llu)!\n",
+			pr_info("btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), old(gen=%llu, objectid=%llu, type=%d, offset=%llu), new(gen=%llu), which is referenced by most recent superblock (superblockgen=%llu)!\n",
 			       btrfsic_get_block_type(state, block), bytenr,
 			       dev_state->name, dev_bytenr, block->mirror_num,
 			       block->generation,
@@ -1923,9 +1875,7 @@ again:
 		}
 
 		if (!block->is_iodone && !block->never_written) {
-			printk(KERN_INFO "btrfs: attempt to overwrite %c-block"
-			       " @%llu (%s/%llu/%d), oldgen=%llu, newgen=%llu,"
-			       " which is not yet iodone!\n",
+			pr_info("btrfs: attempt to overwrite %c-block @%llu (%s/%llu/%d), oldgen=%llu, newgen=%llu, which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, block), bytenr,
 			       dev_state->name, dev_bytenr, block->mirror_num,
 			       block->generation,
@@ -2023,8 +1973,7 @@ again:
 						mapped_datav[0]);
 				if (state->print_mask &
 				    BTRFSIC_PRINT_MASK_TREE_AFTER_SB_WRITE) {
-					printk(KERN_INFO
-					"[after new superblock is written]:\n");
+					pr_info("[after new superblock is written]:\n");
 					btrfsic_dump_tree_sub(state, block, 0);
 				}
 			} else {
@@ -2036,9 +1985,7 @@ again:
 						0, 0);
 			}
 			if (ret)
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_process_metablock"
-				       "(root @%llu) failed!\n",
+				pr_info("btrfsic: btrfsic_process_metablock(root @%llu) failed!\n",
 				       dev_bytenr);
 		} else {
 			block->is_metadata = 0;
@@ -2065,8 +2012,7 @@ again:
 		if (!is_metadata) {
 			processed_len = state->datablock_size;
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO "Written block (%s/%llu/?)"
-				       " !found in hash table, D.\n",
+				pr_info("Written block (%s/%llu/?) !found in hash table, D.\n",
 				       dev_state->name, dev_bytenr);
 			if (!state->include_extent_data) {
 				/* ignore that written D block */
@@ -2084,9 +2030,7 @@ again:
 			btrfsic_cmp_log_and_dev_bytenr(state, bytenr, dev_state,
 						       dev_bytenr);
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "Written block @%llu (%s/%llu/?)"
-				       " !found in hash table, M.\n",
+				pr_info("Written block @%llu (%s/%llu/?) !found in hash table, M.\n",
 				       bytenr, dev_state->name, dev_bytenr);
 		}
 
@@ -2100,7 +2044,7 @@ again:
 
 		block = btrfsic_block_alloc();
 		if (NULL == block) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			btrfsic_release_block_ctx(&block_ctx);
 			goto continue_loop;
 		}
@@ -2150,8 +2094,7 @@ again:
 			block->next_in_same_bio = NULL;
 		}
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "New written %c-block @%llu (%s/%llu/%d)\n",
+			pr_info("New written %c-block @%llu (%s/%llu/%d)\n",
 			       is_metadata ? 'M' : 'D',
 			       block->logical_bytenr, block->dev_state->name,
 			       block->dev_bytenr, block->mirror_num);
@@ -2162,9 +2105,7 @@ again:
 			ret = btrfsic_process_metablock(state, block,
 							&block_ctx, 0, 0);
 			if (ret)
-				printk(KERN_INFO
-				       "btrfsic: process_metablock(root @%llu)"
-				       " failed!\n",
+				pr_info("btrfsic: process_metablock(root @%llu) failed!\n",
 				       dev_bytenr);
 		}
 		btrfsic_release_block_ctx(&block_ctx);
@@ -2199,8 +2140,7 @@ static void btrfsic_bio_end_io(struct bio *bp)
 
 		if ((dev_state->state->print_mask &
 		     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-			printk(KERN_INFO
-			       "bio_end_io(err=%d) for %c @%llu (%s/%llu/%d)\n",
+			pr_info("bio_end_io(err=%d) for %c @%llu (%s/%llu/%d)\n",
 			       bp->bi_error,
 			       btrfsic_get_block_type(dev_state->state, block),
 			       block->logical_bytenr, dev_state->name,
@@ -2211,8 +2151,7 @@ static void btrfsic_bio_end_io(struct bio *bp)
 			dev_state->last_flush_gen++;
 			if ((dev_state->state->print_mask &
 			     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-				printk(KERN_INFO
-				       "bio_end_io() new %s flush_gen=%llu\n",
+				pr_info("bio_end_io() new %s flush_gen=%llu\n",
 				       dev_state->name,
 				       dev_state->last_flush_gen);
 		}
@@ -2235,8 +2174,7 @@ static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
 	BUG_ON(NULL == block);
 	dev_state = block->dev_state;
 	if ((dev_state->state->print_mask & BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-		printk(KERN_INFO
-		       "bh_end_io(error=%d) for %c @%llu (%s/%llu/%d)\n",
+		pr_info("bh_end_io(error=%d) for %c @%llu (%s/%llu/%d)\n",
 		       iodone_w_error,
 		       btrfsic_get_block_type(dev_state->state, block),
 		       block->logical_bytenr, block->dev_state->name,
@@ -2247,8 +2185,7 @@ static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
 		dev_state->last_flush_gen++;
 		if ((dev_state->state->print_mask &
 		     BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
-			printk(KERN_INFO
-			       "bh_end_io() new %s flush_gen=%llu\n",
+			pr_info("bh_end_io() new %s flush_gen=%llu\n",
 			       dev_state->name, dev_state->last_flush_gen);
 	}
 	if (block->submit_bio_bh_rw & REQ_FUA)
@@ -2271,9 +2208,7 @@ static int btrfsic_process_written_superblock(
 	if (!(superblock->generation > state->max_superblock_generation ||
 	      0 == state->max_superblock_generation)) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_SUPERBLOCK_WRITE)
-			printk(KERN_INFO
-			       "btrfsic: superblock @%llu (%s/%llu/%d)"
-			       " with old gen %llu <= %llu\n",
+			pr_info("btrfsic: superblock @%llu (%s/%llu/%d) with old gen %llu <= %llu\n",
 			       superblock->logical_bytenr,
 			       superblock->dev_state->name,
 			       superblock->dev_bytenr, superblock->mirror_num,
@@ -2281,9 +2216,7 @@ static int btrfsic_process_written_superblock(
 			       state->max_superblock_generation);
 	} else {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_SUPERBLOCK_WRITE)
-			printk(KERN_INFO
-			       "btrfsic: got new superblock @%llu (%s/%llu/%d)"
-			       " with new gen %llu > %llu\n",
+			pr_info("btrfsic: got new superblock @%llu (%s/%llu/%d) with new gen %llu > %llu\n",
 			       superblock->logical_bytenr,
 			       superblock->dev_state->name,
 			       superblock->dev_bytenr, superblock->mirror_num,
@@ -2318,7 +2251,7 @@ static int btrfsic_process_written_superblock(
 			next_bytenr = btrfs_super_root(super_hdr);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "root@%llu\n", next_bytenr);
+				pr_info("root@%llu\n", next_bytenr);
 			break;
 		case 1:
 			btrfs_set_disk_key_objectid(&tmp_disk_key,
@@ -2327,7 +2260,7 @@ static int btrfsic_process_written_superblock(
 			next_bytenr = btrfs_super_chunk_root(super_hdr);
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "chunk@%llu\n", next_bytenr);
+				pr_info("chunk@%llu\n", next_bytenr);
 			break;
 		case 2:
 			btrfs_set_disk_key_objectid(&tmp_disk_key,
@@ -2338,7 +2271,7 @@ static int btrfsic_process_written_superblock(
 				continue;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_ROOT_CHUNK_LOG_TREE_LOCATION)
-				printk(KERN_INFO "log@%llu\n", next_bytenr);
+				pr_info("log@%llu\n", next_bytenr);
 			break;
 		}
 
@@ -2346,23 +2279,19 @@ static int btrfsic_process_written_superblock(
 		    btrfs_num_copies(state->root->fs_info,
 				     next_bytenr, BTRFS_SUPER_INFO_SIZE);
 		if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
-			printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
+			pr_info("num_copies(log_bytenr=%llu) = %d\n",
 			       next_bytenr, num_copies);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			int was_created;
 
 			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-				printk(KERN_INFO
-				       "btrfsic_process_written_superblock("
-				       "mirror_num=%d)\n", mirror_num);
+				pr_info("btrfsic_process_written_superblock(mirror_num=%d)\n", mirror_num);
 			ret = btrfsic_map_block(state, next_bytenr,
 						BTRFS_SUPER_INFO_SIZE,
 						&tmp_next_block_ctx,
 						mirror_num);
 			if (ret) {
-				printk(KERN_INFO
-				       "btrfsic: btrfsic_map_block(@%llu,"
-				       " mirror=%d) failed!\n",
+				pr_info("btrfsic: btrfsic_map_block(@%llu, mirror=%d) failed!\n",
 				       next_bytenr, mirror_num);
 				return -1;
 			}
@@ -2375,8 +2304,7 @@ static int btrfsic_process_written_superblock(
 					mirror_num,
 					&was_created);
 			if (NULL == next_block) {
-				printk(KERN_INFO
-				       "btrfsic: error, kmalloc failed!\n");
+				pr_info("btrfsic: error, kmalloc failed!\n");
 				btrfsic_release_block_ctx(&tmp_next_block_ctx);
 				return -1;
 			}
@@ -2425,8 +2353,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 		 * by the most recent super block.
 		 */
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "btrfsic: abort cyclic linkage (case 1).\n");
+			pr_info("btrfsic: abort cyclic linkage (case 1).\n");
 
 		return ret;
 	}
@@ -2437,9 +2364,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 	 */
 	list_for_each_entry(l, &block->ref_to_list, node_ref_to) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "rl=%d, %c @%llu (%s/%llu/%d)"
-			       " %u* refers to %c @%llu (%s/%llu/%d)\n",
+			pr_info("rl=%d, %c @%llu (%s/%llu/%d) %u* refers to %c @%llu (%s/%llu/%d)\n",
 			       recursion_level,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, block->dev_state->name,
@@ -2451,9 +2376,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       l->block_ref_to->dev_bytenr,
 			       l->block_ref_to->mirror_num);
 		if (l->block_ref_to->never_written) {
-			printk(KERN_INFO "btrfs: attempt to write superblock"
-			       " which references block %c @%llu (%s/%llu/%d)"
-			       " which is never written!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is never written!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2461,9 +2384,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       l->block_ref_to->mirror_num);
 			ret = -1;
 		} else if (!l->block_ref_to->is_iodone) {
-			printk(KERN_INFO "btrfs: attempt to write superblock"
-			       " which references block %c @%llu (%s/%llu/%d)"
-			       " which is not yet iodone!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2471,9 +2392,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			       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",
+			pr_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),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2486,10 +2405,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			   l->parent_generation &&
 			   BTRFSIC_GENERATION_UNKNOWN !=
 			   l->block_ref_to->generation) {
-			printk(KERN_INFO "btrfs: attempt to write superblock"
-			       " which references block %c @%llu (%s/%llu/%d)"
-			       " with generation %llu !="
-			       " parent generation %llu!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) with generation %llu != parent generation %llu!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2500,11 +2416,7 @@ static int btrfsic_check_all_ref_blocks(struct btrfsic_state *state,
 			ret = -1;
 		} else if (l->block_ref_to->flush_gen >
 			   l->block_ref_to->dev_state->last_flush_gen) {
-			printk(KERN_INFO "btrfs: attempt to write superblock"
-			       " which references block %c @%llu (%s/%llu/%d)"
-			       " which is not flushed out of disk's write cache"
-			       " (block flush_gen=%llu,"
-			       " dev->flush_gen=%llu)!\n",
+			pr_info("btrfs: attempt to write superblock which references block %c @%llu (%s/%llu/%d) which is not flushed out of disk's write cache (block flush_gen=%llu, dev->flush_gen=%llu)!\n",
 			       btrfsic_get_block_type(state, l->block_ref_to),
 			       l->block_ref_to->logical_bytenr,
 			       l->block_ref_to->dev_state->name,
@@ -2533,8 +2445,7 @@ static int btrfsic_is_block_ref_by_superblock(
 	if (recursion_level >= 3 + BTRFS_MAX_LEVEL) {
 		/* refer to comment at "abort cyclic linkage (case 1)" */
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "btrfsic: abort cyclic linkage (case 2).\n");
+			pr_info("btrfsic: abort cyclic linkage (case 2).\n");
 
 		return 0;
 	}
@@ -2545,9 +2456,7 @@ static int btrfsic_is_block_ref_by_superblock(
 	 */
 	list_for_each_entry(l, &block->ref_from_list, node_ref_from) {
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "rl=%d, %c @%llu (%s/%llu/%d)"
-			       " is ref %u* from %c @%llu (%s/%llu/%d)\n",
+			pr_info("rl=%d, %c @%llu (%s/%llu/%d) is ref %u* from %c @%llu (%s/%llu/%d)\n",
 			       recursion_level,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, block->dev_state->name,
@@ -2577,9 +2486,7 @@ static int btrfsic_is_block_ref_by_superblock(
 static void btrfsic_print_add_link(const struct btrfsic_state *state,
 				   const struct btrfsic_block_link *l)
 {
-	printk(KERN_INFO
-	       "Add %u* link from %c @%llu (%s/%llu/%d)"
-	       " to %c @%llu (%s/%llu/%d).\n",
+	pr_info("Add %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
 	       l->ref_cnt,
 	       btrfsic_get_block_type(state, l->block_ref_from),
 	       l->block_ref_from->logical_bytenr,
@@ -2594,9 +2501,7 @@ static void btrfsic_print_add_link(const struct btrfsic_state *state,
 static void btrfsic_print_rem_link(const struct btrfsic_state *state,
 				   const struct btrfsic_block_link *l)
 {
-	printk(KERN_INFO
-	       "Rem %u* link from %c @%llu (%s/%llu/%d)"
-	       " to %c @%llu (%s/%llu/%d).\n",
+	pr_info("Rem %u* link from %c @%llu (%s/%llu/%d) to %c @%llu (%s/%llu/%d).\n",
 	       l->ref_cnt,
 	       btrfsic_get_block_type(state, l->block_ref_from),
 	       l->block_ref_from->logical_bytenr,
@@ -2708,8 +2613,7 @@ static struct btrfsic_block_link *btrfsic_block_link_lookup_or_add(
 	if (NULL == l) {
 		l = btrfsic_block_link_alloc();
 		if (NULL == l) {
-			printk(KERN_INFO
-			       "btrfsic: error, kmalloc" " failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			return NULL;
 		}
 
@@ -2756,13 +2660,12 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
 
 		block = btrfsic_block_alloc();
 		if (NULL == block) {
-			printk(KERN_INFO "btrfsic: error, kmalloc failed!\n");
+			pr_info("btrfsic: error, kmalloc failed!\n");
 			return NULL;
 		}
 		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev);
 		if (NULL == dev_state) {
-			printk(KERN_INFO
-			       "btrfsic: error, lookup dev_state failed!\n");
+			pr_info("btrfsic: error, lookup dev_state failed!\n");
 			btrfsic_block_free(block);
 			return NULL;
 		}
@@ -2774,8 +2677,7 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
 		block->never_written = never_written;
 		block->mirror_num = mirror_num;
 		if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
-			printk(KERN_INFO
-			       "New %s%c-block @%llu (%s/%llu/%d)\n",
+			pr_info("New %s%c-block @%llu (%s/%llu/%d)\n",
 			       additional_string,
 			       btrfsic_get_block_type(state, block),
 			       block->logical_bytenr, dev_state->name,
@@ -2810,9 +2712,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 		ret = btrfsic_map_block(state, bytenr, state->metablock_size,
 					&block_ctx, mirror_num);
 		if (ret) {
-			printk(KERN_INFO "btrfsic:"
-			       " btrfsic_map_block(logical @%llu,"
-			       " mirror %d) failed!\n",
+			pr_info("btrfsic: btrfsic_map_block(logical @%llu, mirror %d) failed!\n",
 			       bytenr, mirror_num);
 			continue;
 		}
@@ -2827,9 +2727,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 	}
 
 	if (WARN_ON(!match)) {
-		printk(KERN_INFO "btrfs: attempt to write M-block which contains logical bytenr that doesn't map to dev+physical bytenr of submit_bio,"
-		       " buffer->log_bytenr=%llu, submit_bio(bdev=%s,"
-		       " phys_bytenr=%llu)!\n",
+		pr_info("btrfs: attempt to write M-block which contains logical bytenr that doesn't map to dev+physical bytenr of submit_bio, buffer->log_bytenr=%llu, submit_bio(bdev=%s, phys_bytenr=%llu)!\n",
 		       bytenr, dev_state->name, dev_bytenr);
 		for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
 			ret = btrfsic_map_block(state, bytenr,
@@ -2838,8 +2736,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 			if (ret)
 				continue;
 
-			printk(KERN_INFO "Read logical bytenr @%llu maps to"
-			       " (%s/%llu/%d)\n",
+			pr_info("Read logical bytenr @%llu maps to (%s/%llu/%d)\n",
 			       bytenr, block_ctx.dev->name,
 			       block_ctx.dev_bytenr, mirror_num);
 		}
@@ -2849,11 +2746,8 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
 		struct block_device *bdev)
 {
-	struct btrfsic_dev_state *ds;
-
-	ds = btrfsic_dev_state_hashtable_lookup(bdev,
-						&btrfsic_dev_state_hashtable);
-	return ds;
+	return btrfsic_dev_state_hashtable_lookup(bdev,
+						  &btrfsic_dev_state_hashtable);
 }
 
 int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
@@ -2876,9 +2770,7 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 		dev_bytenr = 4096 * bh->b_blocknr;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bh(op=0x%x,0x%x, blocknr=%llu "
-			       "(bytenr %llu), size=%zu, data=%p, bdev=%p)\n",
+			pr_info("submit_bh(op=0x%x,0x%x, blocknr=%llu (bytenr %llu), size=%zu, data=%p, bdev=%p)\n",
 			       op, op_flags, (unsigned long long)bh->b_blocknr,
 			       dev_bytenr, bh->b_size, bh->b_data, bh->b_bdev);
 		btrfsic_process_written_block(dev_state, dev_bytenr,
@@ -2887,17 +2779,13 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 	} else if (NULL != dev_state && (op_flags & REQ_PREFLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bh(op=0x%x,0x%x FLUSH, bdev=%p)\n",
+			pr_info("submit_bh(op=0x%x,0x%x FLUSH, bdev=%p)\n",
 			       op, op_flags, bh->b_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
 			      BTRFSIC_PRINT_MASK_VERBOSE)))
-				printk(KERN_INFO
-				       "btrfsic_submit_bh(%s) with FLUSH"
-				       " but dummy block already in use"
-				       " (ignored)!\n",
+				pr_info("btrfsic_submit_bh(%s) with FLUSH but dummy block already in use (ignored)!\n",
 				       dev_state->name);
 		} else {
 			struct btrfsic_block *const block =
@@ -2942,9 +2830,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
 		bio_is_patched = 0;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bio(rw=%d,0x%x, bi_vcnt=%u,"
-			       " bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
 			       bio_op(bio), bio->bi_opf, bio->bi_vcnt,
 			       (unsigned long long)bio->bi_iter.bi_sector,
 			       dev_bytenr, bio->bi_bdev);
@@ -2967,8 +2853,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
 			}
 			if (dev_state->state->print_mask &
 			    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH_VERBOSE)
-				printk(KERN_INFO
-				       "#%u: bytenr=%llu, len=%u, offset=%u\n",
+				pr_info("#%u: bytenr=%llu, len=%u, offset=%u\n",
 				       i, cur_bytenr, bio->bi_io_vec[i].bv_len,
 				       bio->bi_io_vec[i].bv_offset);
 			cur_bytenr += bio->bi_io_vec[i].bv_len;
@@ -2985,17 +2870,13 @@ static void __btrfsic_submit_bio(struct bio *bio)
 	} else if (NULL != dev_state && (bio->bi_opf & REQ_PREFLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			printk(KERN_INFO
-			       "submit_bio(rw=%d,0x%x FLUSH, bdev=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x FLUSH, bdev=%p)\n",
 			       bio_op(bio), bio->bi_opf, bio->bi_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
 			      BTRFSIC_PRINT_MASK_VERBOSE)))
-				printk(KERN_INFO
-				       "btrfsic_submit_bio(%s) with FLUSH"
-				       " but dummy block already in use"
-				       " (ignored)!\n",
+				pr_info("btrfsic_submit_bio(%s) with FLUSH but dummy block already in use (ignored)!\n",
 				       dev_state->name);
 		} else {
 			struct btrfsic_block *const block =
@@ -3039,14 +2920,12 @@ int btrfsic_mount(struct btrfs_root *root,
 	struct btrfs_device *device;
 
 	if (root->nodesize & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
+		pr_info("btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       root->nodesize, PAGE_SIZE);
 		return -1;
 	}
 	if (root->sectorsize & ((u64)PAGE_SIZE - 1)) {
-		printk(KERN_INFO
-		       "btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
+		pr_info("btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       root->sectorsize, PAGE_SIZE);
 		return -1;
 	}
@@ -3054,7 +2933,7 @@ int btrfsic_mount(struct btrfs_root *root,
 	if (!state) {
 		state = vzalloc(sizeof(*state));
 		if (!state) {
-			printk(KERN_INFO "btrfs check-integrity: vzalloc() failed!\n");
+			pr_info("btrfs check-integrity: vzalloc() failed!\n");
 			return -1;
 		}
 	}
@@ -3086,8 +2965,7 @@ int btrfsic_mount(struct btrfs_root *root,
 
 		ds = btrfsic_dev_state_alloc();
 		if (NULL == ds) {
-			printk(KERN_INFO
-			       "btrfs check-integrity: kmalloc() failed!\n");
+			pr_info("btrfs check-integrity: kmalloc() failed!\n");
 			mutex_unlock(&btrfsic_mutex);
 			return -1;
 		}
@@ -3148,9 +3026,7 @@ void btrfsic_unmount(struct btrfs_root *root,
 	}
 
 	if (NULL == state) {
-		printk(KERN_INFO
-		       "btrfsic: error, cannot find state information"
-		       " on umount!\n");
+		pr_info("btrfsic: error, cannot find state information on umount!\n");
 		mutex_unlock(&btrfsic_mutex);
 		return;
 	}
@@ -3177,9 +3053,7 @@ void btrfsic_unmount(struct btrfs_root *root,
 		if (b_all->is_iodone || b_all->never_written)
 			btrfsic_block_free(b_all);
 		else
-			printk(KERN_INFO "btrfs: attempt to free %c-block"
-			       " @%llu (%s/%llu/%d) on umount which is"
-			       " not yet iodone!\n",
+			pr_info("btrfs: attempt to free %c-block @%llu (%s/%llu/%d) on umount which is not yet iodone!\n",
 			       btrfsic_get_block_type(state, b_all),
 			       b_all->logical_bytenr, b_all->dev_state->name,
 			       b_all->dev_bytenr, b_all->mirror_num);
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 029db6e1105c..ccc70d96958d 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -783,8 +783,7 @@ void __init btrfs_init_compress(void)
 		 */
 		workspace = btrfs_compress_op[i]->alloc_workspace();
 		if (IS_ERR(workspace)) {
-			printk(KERN_WARNING
-	"BTRFS: cannot preallocate compression workspace, will try later");
+			pr_warn("BTRFS: cannot preallocate compression workspace, will try later\n");
 		} else {
 			atomic_set(&btrfs_comp_ws[i].total_ws, 1);
 			btrfs_comp_ws[i].free_ws = 1;
@@ -854,8 +853,7 @@ again:
 					/* no burst */ 1);
 
 			if (__ratelimit(&_rs)) {
-				printk(KERN_WARNING
-			    "no compression workspaces, low memory, retrying");
+				pr_warn("BTRFS: no compression workspaces, low memory, retrying\n");
 			}
 		}
 		goto again;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index d1c56c94dd5a..f6ba165d3f81 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -45,9 +45,7 @@ static int tree_mod_log_free_eb(struct btrfs_fs_info *fs_info,
 
 struct btrfs_path *btrfs_alloc_path(void)
 {
-	struct btrfs_path *path;
-	path = kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
-	return path;
+	return kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
 }
 
 /*
@@ -1102,7 +1100,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 	int level, ret;
 	int last_ref = 0;
 	int unlock_orig = 0;
-	u64 parent_start;
+	u64 parent_start = 0;
 
 	if (*cow_ret == buf)
 		unlock_orig = 1;
@@ -1121,13 +1119,8 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 	else
 		btrfs_node_key(buf, &disk_key, 0);
 
-	if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) {
-		if (parent)
-			parent_start = parent->start;
-		else
-			parent_start = 0;
-	} else
-		parent_start = 0;
+	if ((root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) && parent)
+		parent_start = parent->start;
 
 	cow = btrfs_alloc_tree_block(trans, root, parent_start,
 			root->root_key.objectid, &disk_key, level,
@@ -1170,8 +1163,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 		if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||
 		    btrfs_header_backref_rev(buf) < BTRFS_MIXED_BACKREF_REV)
 			parent_start = buf->start;
-		else
-			parent_start = 0;
 
 		extent_buffer_get(cow);
 		tree_mod_log_set_root_pointer(root, cow, 1);
@@ -1182,11 +1173,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 		free_extent_buffer(buf);
 		add_root_to_dirty_list(root);
 	} else {
-		if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
-			parent_start = parent->start;
-		else
-			parent_start = 0;
-
 		WARN_ON(trans->transid != btrfs_header_generation(parent));
 		tree_mod_log_insert_key(root->fs_info, parent, parent_slot,
 					MOD_LOG_KEY_REPLACE, GFP_NOFS);
@@ -1729,20 +1715,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 	return err;
 }
 
-/*
- * The leaf data grows from end-to-front in the node.
- * this returns the address of the start of the last item,
- * which is the stop of the leaf data stack
- */
-static inline unsigned int leaf_data_end(struct btrfs_root *root,
-					 struct extent_buffer *leaf)
-{
-	u32 nr = btrfs_header_nritems(leaf);
-	if (nr == 0)
-		return BTRFS_LEAF_DATA_SIZE(root);
-	return btrfs_item_offset_nr(leaf, nr - 1);
-}
-
 
 /*
  * search for key in the extent_buffer.  The items start at offset p,
@@ -2268,7 +2240,6 @@ static void reada_for_search(struct btrfs_root *root,
 	u64 search;
 	u64 target;
 	u64 nread = 0;
-	u64 gen;
 	struct extent_buffer *eb;
 	u32 nr;
 	u32 blocksize;
@@ -2313,7 +2284,6 @@ static void reada_for_search(struct btrfs_root *root,
 		search = btrfs_node_blockptr(node, nr);
 		if ((search <= target && target - search <= 65536) ||
 		    (search > target && search - target <= 65536)) {
-			gen = btrfs_node_ptr_generation(node, nr);
 			readahead_tree_block(root, search);
 			nread += blocksize;
 		}
@@ -4341,7 +4311,11 @@ again:
 			if (path->slots[1] == 0)
 				fixup_low_keys(fs_info, path, &disk_key, 1);
 		}
-		btrfs_mark_buffer_dirty(right);
+		/*
+		 * We create a new leaf 'right' for the required ins_len and
+		 * we'll do btrfs_mark_buffer_dirty() on this leaf after copying
+		 * the content of ins_len to 'right'.
+		 */
 		return ret;
 	}
 
@@ -4772,8 +4746,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 
 	if (btrfs_leaf_free_space(root, leaf) < total_size) {
 		btrfs_print_leaf(root, leaf);
-		btrfs_crit(root->fs_info, "not enough freespace need %u have %d",
-		       total_size, btrfs_leaf_free_space(root, leaf));
+		btrfs_crit(root->fs_info,
+			   "not enough freespace need %u have %d",
+			   total_size, btrfs_leaf_free_space(root, leaf));
 		BUG();
 	}
 
@@ -4782,8 +4757,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 
 		if (old_data < data_end) {
 			btrfs_print_leaf(root, leaf);
-			btrfs_crit(root->fs_info, "slot %d old_data %d data_end %d",
-			       slot, old_data, data_end);
+			btrfs_crit(root->fs_info,
+				   "slot %d old_data %d data_end %d",
+				   slot, old_data, data_end);
 			BUG_ON(1);
 		}
 		/*
@@ -4793,7 +4769,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 		for (i = slot; i < nritems; i++) {
 			u32 ioff;
 
-			item = btrfs_item_nr( i);
+			item = btrfs_item_nr(i);
 			ioff = btrfs_token_item_offset(leaf, item, &token);
 			btrfs_set_token_item_offset(leaf, item,
 						    ioff - total_data, &token);
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index e62fd50237e4..6c21bad26a27 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -37,6 +37,7 @@
 #include <linux/workqueue.h>
 #include <linux/security.h>
 #include <linux/sizes.h>
+#include <linux/dynamic_debug.h>
 #include "extent_io.h"
 #include "extent_map.h"
 #include "async-thread.h"
@@ -676,9 +677,25 @@ struct btrfs_device;
 struct btrfs_fs_devices;
 struct btrfs_balance_control;
 struct btrfs_delayed_root;
+
+#define BTRFS_FS_BARRIER			1
+#define BTRFS_FS_CLOSING_START			2
+#define BTRFS_FS_CLOSING_DONE			3
+#define BTRFS_FS_LOG_RECOVERING			4
+#define BTRFS_FS_OPEN				5
+#define BTRFS_FS_QUOTA_ENABLED			6
+#define BTRFS_FS_QUOTA_ENABLING			7
+#define BTRFS_FS_QUOTA_DISABLING		8
+#define BTRFS_FS_UPDATE_UUID_TREE_GEN		9
+#define BTRFS_FS_CREATING_FREE_SPACE_TREE	10
+#define BTRFS_FS_BTREE_ERR			11
+#define BTRFS_FS_LOG1_ERR			12
+#define BTRFS_FS_LOG2_ERR			13
+
 struct btrfs_fs_info {
 	u8 fsid[BTRFS_FSID_SIZE];
 	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+	unsigned long flags;
 	struct btrfs_root *extent_root;
 	struct btrfs_root *tree_root;
 	struct btrfs_root *chunk_root;
@@ -907,10 +924,6 @@ struct btrfs_fs_info {
 	int thread_pool_size;
 
 	struct kobject *space_info_kobj;
-	int do_barriers;
-	int closing;
-	int log_root_recovering;
-	int open;
 
 	u64 total_pinned;
 
@@ -987,17 +1000,6 @@ struct btrfs_fs_info {
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
 	u32 check_integrity_print_mask;
 #endif
-	/*
-	 * quota information
-	 */
-	unsigned int quota_enabled:1;
-
-	/*
-	 * quota_enabled only changes state after a commit. This holds the
-	 * next state.
-	 */
-	unsigned int pending_quota_state:1;
-
 	/* is qgroup tracking in a consistent state? */
 	u64 qgroup_flags;
 
@@ -1061,7 +1063,6 @@ struct btrfs_fs_info {
 	wait_queue_head_t replace_wait;
 
 	struct semaphore uuid_tree_rescan_sem;
-	unsigned int update_uuid_tree_gen:1;
 
 	/* Used to reclaim the metadata space in the background. */
 	struct work_struct async_reclaim_work;
@@ -1080,7 +1081,6 @@ struct btrfs_fs_info {
 	 */
 	struct list_head pinned_chunks;
 
-	int creating_free_space_tree;
 	/* Used to record internally whether fs has been frozen */
 	int fs_frozen;
 };
@@ -1435,13 +1435,13 @@ static inline void btrfs_init_map_token (struct btrfs_map_token *token)
 #define cpu_to_le8(v) (v)
 #define __le8 u8
 
-#define read_eb_member(eb, ptr, type, member, result) (			\
+#define read_eb_member(eb, ptr, type, member, result) (\
 	read_extent_buffer(eb, (char *)(result),			\
 			   ((unsigned long)(ptr)) +			\
 			    offsetof(type, member),			\
 			   sizeof(((type *)0)->member)))
 
-#define write_eb_member(eb, ptr, type, member, result) (		\
+#define write_eb_member(eb, ptr, type, member, result) (\
 	write_extent_buffer(eb, (char *)(result),			\
 			   ((unsigned long)(ptr)) +			\
 			    offsetof(type, member),			\
@@ -2293,6 +2293,21 @@ static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
 	return offsetof(struct btrfs_leaf, items);
 }
 
+/*
+ * The leaf data grows from end-to-front in the node.
+ * this returns the address of the start of the last item,
+ * which is the stop of the leaf data stack
+ */
+static inline unsigned int leaf_data_end(struct btrfs_root *root,
+					 struct extent_buffer *leaf)
+{
+	u32 nr = btrfs_header_nritems(leaf);
+
+	if (nr == 0)
+		return BTRFS_LEAF_DATA_SIZE(root);
+	return btrfs_item_offset_nr(leaf, nr - 1);
+}
+
 /* struct btrfs_file_extent_item */
 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
@@ -2867,10 +2882,14 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
 {
 	/*
-	 * Get synced with close_ctree()
+	 * Do it this way so we only ever do one test_bit in the normal case.
 	 */
-	smp_mb();
-	return fs_info->closing;
+	if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
+		if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
+			return 2;
+		return 1;
+	}
+	return 0;
 }
 
 /*
@@ -3118,7 +3137,7 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
 			       int nr);
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
-			      struct extent_state **cached_state);
+			      struct extent_state **cached_state, int dedupe);
 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
 			     struct btrfs_root *new_root,
 			     struct btrfs_root *parent_root,
@@ -3236,14 +3255,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 			unsigned long new_flags);
 int btrfs_sync_fs(struct super_block *sb, int wait);
 
+static inline __printf(2, 3)
+void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
+{
+}
+
 #ifdef CONFIG_PRINTK
 __printf(2, 3)
 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
 #else
-static inline __printf(2, 3)
-void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
-{
-}
+#define btrfs_printk(fs_info, fmt, args...) \
+	btrfs_no_printk(fs_info, fmt, ##args)
 #endif
 
 #define btrfs_emerg(fs_info, fmt, args...) \
@@ -3314,7 +3336,35 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
 	btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
 #define btrfs_info_rl(fs_info, fmt, args...) \
 	btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
-#ifdef DEBUG
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define btrfs_debug(fs_info, fmt, args...)				\
+do {									\
+        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
+        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
+		btrfs_printk(fs_info, KERN_DEBUG fmt, ##args);		\
+} while (0)
+#define btrfs_debug_in_rcu(fs_info, fmt, args...) 			\
+do {									\
+        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); 	        \
+        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) 		\
+		btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args);	\
+} while (0)
+#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...)			\
+do {									\
+        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
+        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
+		btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt,		\
+				       ##args);\
+} while (0)
+#define btrfs_debug_rl(fs_info, fmt, args...) 				\
+do {									\
+        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
+        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
+		btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt,	\
+					 ##args);			\
+} while (0)
+#elif defined(DEBUG)
 #define btrfs_debug(fs_info, fmt, args...) \
 	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
@@ -3325,13 +3375,13 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
 	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
 #else
 #define btrfs_debug(fs_info, fmt, args...) \
-    no_printk(KERN_DEBUG fmt, ##args)
+	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
-	no_printk(KERN_DEBUG fmt, ##args)
+	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
-	no_printk(KERN_DEBUG fmt, ##args)
+	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
 #define btrfs_debug_rl(fs_info, fmt, args...) \
-	no_printk(KERN_DEBUG fmt, ##args)
+	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
 #endif
 
 #define btrfs_printk_in_rcu(fs_info, fmt, args...)	\
@@ -3362,7 +3412,7 @@ do {								\
 __cold
 static inline void assfail(char *expr, char *file, int line)
 {
-	pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
+	pr_err("assertion failed: %s, file: %s, line: %d\n",
 	       expr, file, line);
 	BUG();
 }
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 3eeb9cd8cfa5..0fcf5f25d524 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -385,11 +385,8 @@ static struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item(
 					struct btrfs_delayed_node *delayed_node,
 					struct btrfs_key *key)
 {
-	struct btrfs_delayed_item *item;
-
-	item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
+	return __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
 					   NULL, NULL);
-	return item;
 }
 
 static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node,
@@ -1481,11 +1478,10 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
 	mutex_lock(&delayed_node->mutex);
 	ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item);
 	if (unlikely(ret)) {
-		btrfs_err(root->fs_info, "err add delayed dir index item(name: %.*s) "
-				"into the insertion tree of the delayed node"
-				"(root id: %llu, inode id: %llu, errno: %d)",
-				name_len, name, delayed_node->root->objectid,
-				delayed_node->inode_id, ret);
+		btrfs_err(root->fs_info,
+			  "err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)",
+			  name_len, name, delayed_node->root->objectid,
+			  delayed_node->inode_id, ret);
 		BUG();
 	}
 	mutex_unlock(&delayed_node->mutex);
@@ -1553,11 +1549,9 @@ int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
 	mutex_lock(&node->mutex);
 	ret = __btrfs_add_delayed_deletion_item(node, item);
 	if (unlikely(ret)) {
-		btrfs_err(root->fs_info, "err add delayed dir index item(index: %llu) "
-				"into the deletion tree of the delayed node"
-				"(root id: %llu, inode id: %llu, errno: %d)",
-				index, node->root->objectid, node->inode_id,
-				ret);
+		btrfs_err(root->fs_info,
+			  "err add delayed dir index item(index: %llu) into the deletion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)",
+			  index, node->root->objectid, node->inode_id, ret);
 		BUG();
 	}
 	mutex_unlock(&node->mutex);
@@ -1874,7 +1868,8 @@ int btrfs_delayed_delete_inode_ref(struct inode *inode)
 	 * leads to enospc problems.  This means we also can't do
 	 * delayed inode refs
 	 */
-	if (BTRFS_I(inode)->root->fs_info->log_root_recovering)
+	if (test_bit(BTRFS_FS_LOG_RECOVERING,
+		     &BTRFS_I(inode)->root->fs_info->flags))
 		return -EAGAIN;
 
 	delayed_node = btrfs_get_or_create_delayed_node(inode);
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index ac02e041464b..8d93854a4b4f 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -322,10 +322,11 @@ int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info,
 		elem = list_first_entry(&fs_info->tree_mod_seq_list,
 					struct seq_list, list);
 		if (seq >= elem->seq) {
-			pr_debug("holding back delayed_ref %#x.%x, lowest is %#x.%x (%p)\n",
-				 (u32)(seq >> 32), (u32)seq,
-				 (u32)(elem->seq >> 32), (u32)elem->seq,
-				 delayed_refs);
+			btrfs_debug(fs_info,
+				"holding back delayed_ref %#x.%x, lowest is %#x.%x (%p)",
+				(u32)(seq >> 32), (u32)seq,
+				(u32)(elem->seq >> 32), (u32)elem->seq,
+				delayed_refs);
 			ret = 1;
 		}
 	}
@@ -770,7 +771,8 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
 	if (!head_ref)
 		goto free_ref;
 
-	if (fs_info->quota_enabled && is_fstree(ref_root)) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    is_fstree(ref_root)) {
 		record = kmalloc(sizeof(*record), GFP_NOFS);
 		if (!record)
 			goto free_head_ref;
@@ -828,7 +830,8 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
 		return -ENOMEM;
 	}
 
-	if (fs_info->quota_enabled && is_fstree(ref_root)) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    is_fstree(ref_root)) {
 		record = kmalloc(sizeof(*record), GFP_NOFS);
 		if (!record) {
 			kmem_cache_free(btrfs_delayed_data_ref_cachep, ref);
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index e9bbff3c0029..05169ef30596 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -218,8 +218,9 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
 	}
 	ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1);
 	if (ret < 0) {
-		btrfs_warn(fs_info, "error %d while searching for dev_replace item!",
-			ret);
+		btrfs_warn(fs_info,
+			   "error %d while searching for dev_replace item!",
+			   ret);
 		goto out;
 	}
 
@@ -238,8 +239,9 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
 		 */
 		ret = btrfs_del_item(trans, dev_root, path);
 		if (ret != 0) {
-			btrfs_warn(fs_info, "delete too small dev_replace item failed %d!",
-				ret);
+			btrfs_warn(fs_info,
+				   "delete too small dev_replace item failed %d!",
+				   ret);
 			goto out;
 		}
 		ret = 1;
@@ -251,8 +253,8 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
 		ret = btrfs_insert_empty_item(trans, dev_root, path,
 					      &key, sizeof(*ptr));
 		if (ret < 0) {
-			btrfs_warn(fs_info, "insert dev_replace item failed %d!",
-				ret);
+			btrfs_warn(fs_info,
+				   "insert dev_replace item failed %d!", ret);
 			goto out;
 		}
 	}
@@ -383,7 +385,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, char *tgtdev_name,
 
 	ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device);
 	if (ret)
-		btrfs_err(fs_info, "kobj add dev failed %d\n", ret);
+		btrfs_err(fs_info, "kobj add dev failed %d", ret);
 
 	btrfs_wait_ordered_roots(root->fs_info, -1, 0, (u64)-1);
 
@@ -772,9 +774,10 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info)
 		break;
 	}
 	if (!dev_replace->tgtdev || !dev_replace->tgtdev->bdev) {
-		btrfs_info(fs_info, "cannot continue dev_replace, tgtdev is missing");
 		btrfs_info(fs_info,
-			"you may cancel the operation after 'mount -o degraded'");
+			   "cannot continue dev_replace, tgtdev is missing");
+		btrfs_info(fs_info,
+			   "you may cancel the operation after 'mount -o degraded'");
 		btrfs_dev_replace_unlock(dev_replace, 1);
 		return 0;
 	}
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 1752625fb4dd..0dc1a033275e 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -472,9 +472,10 @@ int verify_dir_item(struct btrfs_root *root,
 	/* BTRFS_MAX_XATTR_SIZE is the same for all dir items */
 	if ((btrfs_dir_data_len(leaf, dir_item) +
 	     btrfs_dir_name_len(leaf, dir_item)) > BTRFS_MAX_XATTR_SIZE(root)) {
-		btrfs_crit(root->fs_info, "invalid dir item name + data len: %u + %u",
-		       (unsigned)btrfs_dir_name_len(leaf, dir_item),
-		       (unsigned)btrfs_dir_data_len(leaf, dir_item));
+		btrfs_crit(root->fs_info,
+			   "invalid dir item name + data len: %u + %u",
+			   (unsigned)btrfs_dir_name_len(leaf, dir_item),
+			   (unsigned)btrfs_dir_data_len(leaf, dir_item));
 		return 1;
 	}
 
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 54bc8c7c6bcd..e720d3e6ec20 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -326,8 +326,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
 
 			read_extent_buffer(buf, &val, 0, csum_size);
 			btrfs_warn_rl(fs_info,
-				"%s checksum verify failed on %llu wanted %X found %X "
-				"level %d",
+				"%s checksum verify failed on %llu wanted %X found %X level %d",
 				fs_info->sb->s_id, buf->start,
 				val, found, btrfs_header_level(buf));
 			if (result != (char *)&inline_result)
@@ -402,7 +401,8 @@ out:
  * Return 0 if the superblock checksum type matches the checksum value of that
  * algorithm. Pass the raw disk superblock data.
  */
-static int btrfs_check_super_csum(char *raw_disk_sb)
+static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
+				  char *raw_disk_sb)
 {
 	struct btrfs_super_block *disk_sb =
 		(struct btrfs_super_block *)raw_disk_sb;
@@ -428,7 +428,7 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
 	}
 
 	if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
-		printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n",
+		btrfs_err(fs_info, "unsupported checksum algorithm %u",
 				csum_type);
 		ret = 1;
 	}
@@ -442,7 +442,7 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
  */
 static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 					  struct extent_buffer *eb,
-					  u64 start, u64 parent_transid)
+					  u64 parent_transid)
 {
 	struct extent_io_tree *io_tree;
 	int failed = 0;
@@ -454,8 +454,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 	clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 	io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
 	while (1) {
-		ret = read_extent_buffer_pages(io_tree, eb, start,
-					       WAIT_COMPLETE,
+		ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE,
 					       btree_get_extent, mirror_num);
 		if (!ret) {
 			if (!verify_parent_transid(io_tree, eb,
@@ -547,9 +546,10 @@ static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
 }
 
 #define CORRUPT(reason, eb, root, slot)				\
-	btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu,"	\
-		   "root=%llu, slot=%d", reason,			\
-	       btrfs_header_bytenr(eb),	root->objectid, slot)
+	btrfs_crit(root->fs_info, "corrupt %s, %s: block=%llu,"	\
+		   " root=%llu, slot=%d",			\
+		   btrfs_header_level(eb) == 0 ? "leaf" : "node",\
+		   reason, btrfs_header_bytenr(eb), root->objectid, slot)
 
 static noinline int check_leaf(struct btrfs_root *root,
 			       struct extent_buffer *leaf)
@@ -636,6 +636,10 @@ static noinline int check_leaf(struct btrfs_root *root,
 static int check_node(struct btrfs_root *root, struct extent_buffer *node)
 {
 	unsigned long nr = btrfs_header_nritems(node);
+	struct btrfs_key key, next_key;
+	int slot;
+	u64 bytenr;
+	int ret = 0;
 
 	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) {
 		btrfs_crit(root->fs_info,
@@ -643,7 +647,26 @@ static int check_node(struct btrfs_root *root, struct extent_buffer *node)
 			   node->start, root->objectid, nr);
 		return -EIO;
 	}
-	return 0;
+
+	for (slot = 0; slot < nr - 1; slot++) {
+		bytenr = btrfs_node_blockptr(node, slot);
+		btrfs_node_key_to_cpu(node, &key, slot);
+		btrfs_node_key_to_cpu(node, &next_key, slot + 1);
+
+		if (!bytenr) {
+			CORRUPT("invalid item slot", node, root, slot);
+			ret = -EIO;
+			goto out;
+		}
+
+		if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
+			CORRUPT("bad key order", node, root, slot);
+			ret = -EIO;
+			goto out;
+		}
+	}
+out:
+	return ret;
 }
 
 static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
@@ -1132,7 +1155,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr)
 	if (IS_ERR(buf))
 		return;
 	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
-				 buf, 0, WAIT_NONE, btree_get_extent, 0);
+				 buf, WAIT_NONE, btree_get_extent, 0);
 	free_extent_buffer(buf);
 }
 
@@ -1150,7 +1173,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
 
 	set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
 
-	ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK,
+	ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK,
 				       btree_get_extent, mirror_num);
 	if (ret) {
 		free_extent_buffer(buf);
@@ -1206,7 +1229,7 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 	if (IS_ERR(buf))
 		return buf;
 
-	ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
+	ret = btree_read_extent_buffer_pages(root, buf, parent_transid);
 	if (ret) {
 		free_extent_buffer(buf);
 		return ERR_PTR(ret);
@@ -1839,7 +1862,7 @@ static int cleaner_kthread(void *arg)
 		 * Do not do anything if we might cause open_ctree() to block
 		 * before we have finished mounting the filesystem.
 		 */
-		if (!root->fs_info->open)
+		if (!test_bit(BTRFS_FS_OPEN, &root->fs_info->flags))
 			goto sleep;
 
 		if (!mutex_trylock(&root->fs_info->cleaner_mutex))
@@ -2332,8 +2355,6 @@ static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
 	fs_info->qgroup_op_tree = RB_ROOT;
 	INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 	fs_info->qgroup_seq = 1;
-	fs_info->quota_enabled = 0;
-	fs_info->pending_quota_state = 0;
 	fs_info->qgroup_ulist = NULL;
 	fs_info->qgroup_rescan_running = false;
 	mutex_init(&fs_info->qgroup_rescan_lock);
@@ -2518,8 +2539,7 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info,
 	root = btrfs_read_tree_root(tree_root, &location);
 	if (!IS_ERR(root)) {
 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
-		fs_info->quota_enabled = 1;
-		fs_info->pending_quota_state = 1;
+		set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 		fs_info->quota_root = root;
 	}
 
@@ -2710,8 +2730,7 @@ int open_ctree(struct super_block *sb,
 	extent_io_tree_init(&fs_info->freed_extents[1],
 			     fs_info->btree_inode->i_mapping);
 	fs_info->pinned_extents = &fs_info->freed_extents[0];
-	fs_info->do_barriers = 1;
-
+	set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
 
 	mutex_init(&fs_info->ordered_operations_mutex);
 	mutex_init(&fs_info->tree_log_mutex);
@@ -2762,7 +2781,7 @@ int open_ctree(struct super_block *sb,
 	 * We want to check superblock checksum, the type is stored inside.
 	 * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k).
 	 */
-	if (btrfs_check_super_csum(bh->b_data)) {
+	if (btrfs_check_super_csum(fs_info, bh->b_data)) {
 		btrfs_err(fs_info, "superblock checksum mismatch");
 		err = -EINVAL;
 		brelse(bh);
@@ -3199,10 +3218,9 @@ retry_root_backup:
 			return ret;
 		}
 	} else {
-		fs_info->update_uuid_tree_gen = 1;
+		set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
 	}
-
-	fs_info->open = 1;
+	set_bit(BTRFS_FS_OPEN, &fs_info->flags);
 
 	/*
 	 * backuproot only affect mount behavior, and if open_ctree succeeded,
@@ -3607,7 +3625,7 @@ int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags)
 	}
 
 	if (min_tolerated == INT_MAX) {
-		pr_warn("BTRFS: unknown raid flag: %llu\n", flags);
+		pr_warn("BTRFS: unknown raid flag: %llu", flags);
 		min_tolerated = 0;
 	}
 
@@ -3893,8 +3911,7 @@ void close_ctree(struct btrfs_root *root)
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	int ret;
 
-	fs_info->closing = 1;
-	smp_mb();
+	set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags);
 
 	/* wait for the qgroup rescan worker to stop */
 	btrfs_qgroup_wait_for_completion(fs_info, false);
@@ -3939,8 +3956,7 @@ void close_ctree(struct btrfs_root *root)
 	kthread_stop(fs_info->transaction_kthread);
 	kthread_stop(fs_info->cleaner_kthread);
 
-	fs_info->closing = 2;
-	smp_mb();
+	set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);
 
 	btrfs_free_qgroup_config(fs_info);
 
@@ -3965,7 +3981,7 @@ void close_ctree(struct btrfs_root *root)
 	invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
 	btrfs_stop_all_workers(fs_info);
 
-	fs_info->open = 0;
+	clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
 	free_root_pointers(fs_info, 1);
 
 	iput(fs_info->btree_inode);
@@ -4036,8 +4052,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 	root = BTRFS_I(buf->pages[0]->mapping->host)->root;
 	btrfs_assert_tree_locked(buf);
 	if (transid != root->fs_info->generation)
-		WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, "
-		       "found %llu running %llu\n",
+		WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n",
 			buf->start, transid, root->fs_info->generation);
 	was_dirty = set_extent_buffer_dirty(buf);
 	if (!was_dirty)
@@ -4088,7 +4103,7 @@ void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root)
 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
 {
 	struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;
-	return btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
+	return btree_read_extent_buffer_pages(root, buf, parent_transid);
 }
 
 static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
@@ -4100,24 +4115,24 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	int ret = 0;
 
 	if (btrfs_super_magic(sb) != BTRFS_MAGIC) {
-		printk(KERN_ERR "BTRFS: no valid FS found\n");
+		btrfs_err(fs_info, "no valid FS found");
 		ret = -EINVAL;
 	}
 	if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP)
-		printk(KERN_WARNING "BTRFS: unrecognized super flag: %llu\n",
+		btrfs_warn(fs_info, "unrecognized super flag: %llu",
 				btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP);
 	if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: tree_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "tree_root level too big: %d >= %d",
 				btrfs_super_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: chunk_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "chunk_root level too big: %d >= %d",
 				btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) {
-		printk(KERN_ERR "BTRFS: log_root level too big: %d >= %d\n",
+		btrfs_err(fs_info, "log_root level too big: %d >= %d",
 				btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL);
 		ret = -EINVAL;
 	}
@@ -4128,47 +4143,48 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 */
 	if (!is_power_of_2(sectorsize) || sectorsize < 4096 ||
 	    sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize);
+		btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize);
 		ret = -EINVAL;
 	}
 	/* Only PAGE SIZE is supported yet */
 	if (sectorsize != PAGE_SIZE) {
-		printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n",
-				sectorsize, PAGE_SIZE);
+		btrfs_err(fs_info,
+			"sectorsize %llu not supported yet, only support %lu",
+			sectorsize, PAGE_SIZE);
 		ret = -EINVAL;
 	}
 	if (!is_power_of_2(nodesize) || nodesize < sectorsize ||
 	    nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
-		printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize);
+		btrfs_err(fs_info, "invalid nodesize %llu", nodesize);
 		ret = -EINVAL;
 	}
 	if (nodesize != le32_to_cpu(sb->__unused_leafsize)) {
-		printk(KERN_ERR "BTRFS: invalid leafsize %u, should be %llu\n",
-				le32_to_cpu(sb->__unused_leafsize),
-				nodesize);
+		btrfs_err(fs_info, "invalid leafsize %u, should be %llu",
+			  le32_to_cpu(sb->__unused_leafsize), nodesize);
 		ret = -EINVAL;
 	}
 
 	/* Root alignment check */
 	if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n",
-				btrfs_super_root(sb));
+		btrfs_warn(fs_info, "tree_root block unaligned: %llu",
+			   btrfs_super_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: chunk_root block unaligned: %llu\n",
-				btrfs_super_chunk_root(sb));
+		btrfs_warn(fs_info, "chunk_root block unaligned: %llu",
+			   btrfs_super_chunk_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
-		printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n",
-				btrfs_super_log_root(sb));
+		btrfs_warn(fs_info, "log_root block unaligned: %llu",
+			   btrfs_super_log_root(sb));
 		ret = -EINVAL;
 	}
 
 	if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) {
-		printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n",
-				fs_info->fsid, sb->dev_item.fsid);
+		btrfs_err(fs_info,
+			   "dev_item UUID does not match fsid: %pU != %pU",
+			   fs_info->fsid, sb->dev_item.fsid);
 		ret = -EINVAL;
 	}
 
@@ -4178,25 +4194,25 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 */
 	if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
 		btrfs_err(fs_info, "bytes_used is too small %llu",
-		       btrfs_super_bytes_used(sb));
+			  btrfs_super_bytes_used(sb));
 		ret = -EINVAL;
 	}
 	if (!is_power_of_2(btrfs_super_stripesize(sb))) {
 		btrfs_err(fs_info, "invalid stripesize %u",
-		       btrfs_super_stripesize(sb));
+			  btrfs_super_stripesize(sb));
 		ret = -EINVAL;
 	}
 	if (btrfs_super_num_devices(sb) > (1UL << 31))
-		printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n",
-				btrfs_super_num_devices(sb));
+		btrfs_warn(fs_info, "suspicious number of devices: %llu",
+			   btrfs_super_num_devices(sb));
 	if (btrfs_super_num_devices(sb) == 0) {
-		printk(KERN_ERR "BTRFS: number of devices is 0\n");
+		btrfs_err(fs_info, "number of devices is 0");
 		ret = -EINVAL;
 	}
 
 	if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) {
-		printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n",
-				btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
+		btrfs_err(fs_info, "super offset mismatch %llu != %u",
+			  btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET);
 		ret = -EINVAL;
 	}
 
@@ -4205,17 +4221,17 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * and one chunk
 	 */
 	if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
-		printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n",
-				btrfs_super_sys_array_size(sb),
-				BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
+		btrfs_err(fs_info, "system chunk array too big %u > %u",
+			  btrfs_super_sys_array_size(sb),
+			  BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
 		ret = -EINVAL;
 	}
 	if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
 			+ sizeof(struct btrfs_chunk)) {
-		printk(KERN_ERR "BTRFS: system chunk array too small %u < %zu\n",
-				btrfs_super_sys_array_size(sb),
-				sizeof(struct btrfs_disk_key)
-				+ sizeof(struct btrfs_chunk));
+		btrfs_err(fs_info, "system chunk array too small %u < %zu",
+			  btrfs_super_sys_array_size(sb),
+			  sizeof(struct btrfs_disk_key)
+			  + sizeof(struct btrfs_chunk));
 		ret = -EINVAL;
 	}
 
@@ -4224,14 +4240,16 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	 * but it's still possible that it's the one that's wrong.
 	 */
 	if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb))
-		printk(KERN_WARNING
-			"BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n",
-			btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb));
+		btrfs_warn(fs_info,
+			"suspicious: generation < chunk_root_generation: %llu < %llu",
+			btrfs_super_generation(sb),
+			btrfs_super_chunk_root_generation(sb));
 	if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb)
 	    && btrfs_super_cache_generation(sb) != (u64)-1)
-		printk(KERN_WARNING
-			"BTRFS: suspicious: generation < cache_generation: %llu < %llu\n",
-			btrfs_super_generation(sb), btrfs_super_cache_generation(sb));
+		btrfs_warn(fs_info,
+			"suspicious: generation < cache_generation: %llu < %llu",
+			btrfs_super_generation(sb),
+			btrfs_super_cache_generation(sb));
 
 	return ret;
 }
@@ -4475,9 +4493,80 @@ again:
 	return 0;
 }
 
+static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache)
+{
+	struct inode *inode;
+
+	inode = cache->io_ctl.inode;
+	if (inode) {
+		invalidate_inode_pages2(inode->i_mapping);
+		BTRFS_I(inode)->generation = 0;
+		cache->io_ctl.inode = NULL;
+		iput(inode);
+	}
+	btrfs_put_block_group(cache);
+}
+
+void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans,
+			     struct btrfs_root *root)
+{
+	struct btrfs_block_group_cache *cache;
+
+	spin_lock(&cur_trans->dirty_bgs_lock);
+	while (!list_empty(&cur_trans->dirty_bgs)) {
+		cache = list_first_entry(&cur_trans->dirty_bgs,
+					 struct btrfs_block_group_cache,
+					 dirty_list);
+		if (!cache) {
+			btrfs_err(root->fs_info,
+				  "orphan block group dirty_bgs list");
+			spin_unlock(&cur_trans->dirty_bgs_lock);
+			return;
+		}
+
+		if (!list_empty(&cache->io_list)) {
+			spin_unlock(&cur_trans->dirty_bgs_lock);
+			list_del_init(&cache->io_list);
+			btrfs_cleanup_bg_io(cache);
+			spin_lock(&cur_trans->dirty_bgs_lock);
+		}
+
+		list_del_init(&cache->dirty_list);
+		spin_lock(&cache->lock);
+		cache->disk_cache_state = BTRFS_DC_ERROR;
+		spin_unlock(&cache->lock);
+
+		spin_unlock(&cur_trans->dirty_bgs_lock);
+		btrfs_put_block_group(cache);
+		spin_lock(&cur_trans->dirty_bgs_lock);
+	}
+	spin_unlock(&cur_trans->dirty_bgs_lock);
+
+	while (!list_empty(&cur_trans->io_bgs)) {
+		cache = list_first_entry(&cur_trans->io_bgs,
+					 struct btrfs_block_group_cache,
+					 io_list);
+		if (!cache) {
+			btrfs_err(root->fs_info,
+				  "orphan block group on io_bgs list");
+			return;
+		}
+
+		list_del_init(&cache->io_list);
+		spin_lock(&cache->lock);
+		cache->disk_cache_state = BTRFS_DC_ERROR;
+		spin_unlock(&cache->lock);
+		btrfs_cleanup_bg_io(cache);
+	}
+}
+
 void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
 				   struct btrfs_root *root)
 {
+	btrfs_cleanup_dirty_bgs(cur_trans, root);
+	ASSERT(list_empty(&cur_trans->dirty_bgs));
+	ASSERT(list_empty(&cur_trans->io_bgs));
+
 	btrfs_destroy_delayed_refs(cur_trans, root);
 
 	cur_trans->state = TRANS_STATE_COMMIT_START;
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index f19a982f5a4f..1a3237e5700f 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -136,6 +136,8 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info);
 int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
 		       struct btrfs_root *root);
+void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans,
+			     struct btrfs_root *root);
 void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
 				  struct btrfs_root *root);
 struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 665da8f66ff1..210c94ac8818 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -87,7 +87,8 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
 			  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,
+static void dump_space_info(struct btrfs_fs_info *fs_info,
+			    struct btrfs_space_info *info, u64 bytes,
 			    int dump_block_groups);
 static int btrfs_add_reserved_bytes(struct btrfs_block_group_cache *cache,
 				    u64 ram_bytes, u64 num_bytes, int delalloc);
@@ -266,9 +267,8 @@ static int exclude_super_stripes(struct btrfs_root *root,
 
 	for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
 		bytenr = btrfs_sb_offset(i);
-		ret = btrfs_rmap_block(&root->fs_info->mapping_tree,
-				       cache->key.objectid, bytenr,
-				       0, &logical, &nr, &stripe_len);
+		ret = btrfs_rmap_block(root->fs_info, cache->key.objectid,
+				       bytenr, 0, &logical, &nr, &stripe_len);
 		if (ret)
 			return ret;
 
@@ -730,11 +730,7 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
 static struct btrfs_block_group_cache *
 btrfs_lookup_first_block_group(struct btrfs_fs_info *info, u64 bytenr)
 {
-	struct btrfs_block_group_cache *cache;
-
-	cache = block_group_cache_tree_search(info, bytenr, 0);
-
-	return cache;
+	return block_group_cache_tree_search(info, bytenr, 0);
 }
 
 /*
@@ -744,11 +740,7 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(
 						 struct btrfs_fs_info *info,
 						 u64 bytenr)
 {
-	struct btrfs_block_group_cache *cache;
-
-	cache = block_group_cache_tree_search(info, bytenr, 1);
-
-	return cache;
+	return block_group_cache_tree_search(info, bytenr, 1);
 }
 
 static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
@@ -2360,7 +2352,13 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans,
 		ins.type = BTRFS_EXTENT_ITEM_KEY;
 	}
 
-	BUG_ON(node->ref_mod != 1);
+	if (node->ref_mod != 1) {
+		btrfs_err(root->fs_info,
+	"btree block(%llu) has %d references rather than 1: action %d ref_root %llu parent %llu",
+			  node->bytenr, node->ref_mod, node->action, ref_root,
+			  parent);
+		return -EIO;
+	}
 	if (node->action == BTRFS_ADD_DELAYED_REF && insert_reserved) {
 		BUG_ON(!extent_op || !extent_op->update_flags);
 		ret = alloc_reserved_tree_block(trans, root,
@@ -2590,7 +2588,9 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 					if (must_insert_reserved)
 						locked_ref->must_insert_reserved = 1;
 					locked_ref->processing = 0;
-					btrfs_debug(fs_info, "run_delayed_extent_op returned %d", ret);
+					btrfs_debug(fs_info,
+						    "run_delayed_extent_op returned %d",
+						    ret);
 					btrfs_delayed_ref_unlock(locked_ref);
 					return ret;
 				}
@@ -2650,7 +2650,8 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 			locked_ref->processing = 0;
 			btrfs_delayed_ref_unlock(locked_ref);
 			btrfs_put_delayed_ref(ref);
-			btrfs_debug(fs_info, "run_one_delayed_ref returned %d", ret);
+			btrfs_debug(fs_info, "run_one_delayed_ref returned %d",
+				    ret);
 			return ret;
 		}
 
@@ -2940,7 +2941,7 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 	if (trans->aborted)
 		return 0;
 
-	if (root->fs_info->creating_free_space_tree)
+	if (test_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &root->fs_info->flags))
 		return 0;
 
 	if (root == root->fs_info->extent_root)
@@ -2971,7 +2972,6 @@ again:
 			spin_unlock(&delayed_refs->lock);
 			goto out;
 		}
-		count = (unsigned long)-1;
 
 		while (node) {
 			head = rb_entry(node, struct btrfs_delayed_ref_head,
@@ -3694,6 +3694,8 @@ again:
 			goto again;
 		}
 		spin_unlock(&cur_trans->dirty_bgs_lock);
+	} else if (ret < 0) {
+		btrfs_cleanup_dirty_bgs(cur_trans, root);
 	}
 
 	btrfs_free_path(path);
@@ -4429,7 +4431,7 @@ void check_system_chunk(struct btrfs_trans_handle *trans,
 	if (left < thresh && btrfs_test_opt(root->fs_info, ENOSPC_DEBUG)) {
 		btrfs_info(root->fs_info, "left=%llu, need=%llu, flags=%llu",
 			left, thresh, type);
-		dump_space_info(info, 0, 0);
+		dump_space_info(root->fs_info, info, 0, 0);
 	}
 
 	if (left < thresh) {
@@ -5186,7 +5188,7 @@ static int __reserve_metadata_bytes(struct btrfs_root *root,
 		 * which means we won't have fs_info->fs_root set, so don't do
 		 * the async reclaim as we will panic.
 		 */
-		if (!root->fs_info->log_root_recovering &&
+		if (!test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags) &&
 		    need_do_async_reclaim(space_info, root, used) &&
 		    !work_busy(&root->fs_info->async_reclaim_work)) {
 			trace_btrfs_trigger_flush(root->fs_info,
@@ -5792,7 +5794,7 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
 	int ret;
 	struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
 
-	if (root->fs_info->quota_enabled) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags)) {
 		/* One for parent inode, two for dir entries */
 		num_bytes = 3 * root->nodesize;
 		ret = btrfs_qgroup_reserve_meta(root, num_bytes);
@@ -5970,7 +5972,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 	csum_bytes = BTRFS_I(inode)->csum_bytes;
 	spin_unlock(&BTRFS_I(inode)->lock);
 
-	if (root->fs_info->quota_enabled) {
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags)) {
 		ret = btrfs_qgroup_reserve_meta(root,
 				nr_extents * root->nodesize);
 		if (ret)
@@ -6110,8 +6112,6 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
  * @start: start range we are writing to
  * @len: how long the range we are writing to
  *
- * TODO: This function will finally replace old btrfs_delalloc_reserve_space()
- *
  * This will do the following things
  *
  * o reserve space in data space info for num bytes
@@ -6930,8 +6930,9 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
 			}
 
 			if (ret) {
-				btrfs_err(info, "umm, got %d back from search, was looking for %llu",
-					ret, bytenr);
+				btrfs_err(info,
+					  "umm, got %d back from search, was looking for %llu",
+					  ret, bytenr);
 				if (ret > 0)
 					btrfs_print_leaf(extent_root,
 							 path->nodes[0]);
@@ -6977,7 +6978,8 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
 		ret = btrfs_search_slot(trans, extent_root, &key, path,
 					-1, 1);
 		if (ret) {
-			btrfs_err(info, "umm, got %d back from search, was looking for %llu",
+			btrfs_err(info,
+				  "umm, got %d back from search, was looking for %llu",
 				ret, bytenr);
 			btrfs_print_leaf(extent_root, path->nodes[0]);
 		}
@@ -7004,8 +7006,9 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
 
 	refs = btrfs_extent_refs(leaf, ei);
 	if (refs < refs_to_drop) {
-		btrfs_err(info, "trying to drop %d refs but we only have %Lu "
-			  "for bytenr %Lu", refs_to_drop, refs, bytenr);
+		btrfs_err(info,
+			  "trying to drop %d refs but we only have %Lu for bytenr %Lu",
+			  refs_to_drop, refs, bytenr);
 		ret = -EINVAL;
 		btrfs_abort_transaction(trans, ret);
 		goto out;
@@ -7901,23 +7904,24 @@ out:
 	return ret;
 }
 
-static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
+static void dump_space_info(struct btrfs_fs_info *fs_info,
+			    struct btrfs_space_info *info, u64 bytes,
 			    int dump_block_groups)
 {
 	struct btrfs_block_group_cache *cache;
 	int index = 0;
 
 	spin_lock(&info->lock);
-	printk(KERN_INFO "BTRFS: space_info %llu has %llu free, is %sfull\n",
-	       info->flags,
-	       info->total_bytes - info->bytes_used - info->bytes_pinned -
-	       info->bytes_reserved - info->bytes_readonly -
-	       info->bytes_may_use, (info->full) ? "" : "not ");
-	printk(KERN_INFO "BTRFS: space_info total=%llu, used=%llu, pinned=%llu, "
-	       "reserved=%llu, may_use=%llu, readonly=%llu\n",
-	       info->total_bytes, info->bytes_used, info->bytes_pinned,
-	       info->bytes_reserved, info->bytes_may_use,
-	       info->bytes_readonly);
+	btrfs_info(fs_info, "space_info %llu has %llu free, is %sfull",
+		   info->flags,
+		   info->total_bytes - info->bytes_used - info->bytes_pinned -
+		   info->bytes_reserved - info->bytes_readonly -
+		   info->bytes_may_use, (info->full) ? "" : "not ");
+	btrfs_info(fs_info,
+		"space_info total=%llu, used=%llu, pinned=%llu, reserved=%llu, may_use=%llu, readonly=%llu",
+		info->total_bytes, info->bytes_used, info->bytes_pinned,
+		info->bytes_reserved, info->bytes_may_use,
+		info->bytes_readonly);
 	spin_unlock(&info->lock);
 
 	if (!dump_block_groups)
@@ -7927,12 +7931,11 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
 again:
 	list_for_each_entry(cache, &info->block_groups[index], list) {
 		spin_lock(&cache->lock);
-		printk(KERN_INFO "BTRFS: "
-			   "block group %llu has %llu bytes, "
-			   "%llu used %llu pinned %llu reserved %s\n",
-		       cache->key.objectid, cache->key.offset,
-		       btrfs_block_group_used(&cache->item), cache->pinned,
-		       cache->reserved, cache->ro ? "[readonly]" : "");
+		btrfs_info(fs_info,
+			"block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %s",
+			cache->key.objectid, cache->key.offset,
+			btrfs_block_group_used(&cache->item), cache->pinned,
+			cache->reserved, cache->ro ? "[readonly]" : "");
 		btrfs_dump_free_space(cache, bytes);
 		spin_unlock(&cache->lock);
 	}
@@ -7946,6 +7949,7 @@ int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes,
 			 u64 empty_size, u64 hint_byte,
 			 struct btrfs_key *ins, int is_data, int delalloc)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	bool final_tried = num_bytes == min_alloc_size;
 	u64 flags;
 	int ret;
@@ -7956,8 +7960,7 @@ again:
 	ret = find_free_extent(root, ram_bytes, num_bytes, empty_size,
 			       hint_byte, ins, flags, delalloc);
 	if (!ret && !is_data) {
-		btrfs_dec_block_group_reservations(root->fs_info,
-						   ins->objectid);
+		btrfs_dec_block_group_reservations(fs_info, ins->objectid);
 	} else if (ret == -ENOSPC) {
 		if (!final_tried && ins->offset) {
 			num_bytes = min(num_bytes >> 1, ins->offset);
@@ -7967,14 +7970,15 @@ again:
 			if (num_bytes == min_alloc_size)
 				final_tried = true;
 			goto again;
-		} else if (btrfs_test_opt(root->fs_info, ENOSPC_DEBUG)) {
+		} else if (btrfs_test_opt(fs_info, ENOSPC_DEBUG)) {
 			struct btrfs_space_info *sinfo;
 
-			sinfo = __find_space_info(root->fs_info, flags);
-			btrfs_err(root->fs_info, "allocation failed flags %llu, wanted %llu",
-				flags, num_bytes);
+			sinfo = __find_space_info(fs_info, flags);
+			btrfs_err(root->fs_info,
+				  "allocation failed flags %llu, wanted %llu",
+				  flags, num_bytes);
 			if (sinfo)
-				dump_space_info(sinfo, num_bytes, 1);
+				dump_space_info(fs_info, sinfo, num_bytes, 1);
 		}
 	}
 
@@ -8462,7 +8466,6 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 	u64 refs;
 	u64 flags;
 	u32 nritems;
-	u32 blocksize;
 	struct btrfs_key key;
 	struct extent_buffer *eb;
 	int ret;
@@ -8480,7 +8483,6 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 
 	eb = path->nodes[wc->level];
 	nritems = btrfs_header_nritems(eb);
-	blocksize = root->nodesize;
 
 	for (slot = path->slots[wc->level]; slot < nritems; slot++) {
 		if (nread >= wc->reada_count)
@@ -8544,7 +8546,7 @@ static int account_leaf_items(struct btrfs_trans_handle *trans,
 	u64 bytenr, num_bytes;
 
 	/* We can be called directly from walk_up_proc() */
-	if (!root->fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags))
 		return 0;
 
 	for (i = 0; i < nr; i++) {
@@ -8653,7 +8655,7 @@ static int account_shared_subtree(struct btrfs_trans_handle *trans,
 	BUG_ON(root_level < 0 || root_level > BTRFS_MAX_LEVEL);
 	BUG_ON(root_eb == NULL);
 
-	if (!root->fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags))
 		return 0;
 
 	if (!extent_buffer_uptodate(root_eb)) {
@@ -8884,14 +8886,13 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 	ret = btrfs_lookup_extent_info(trans, root, bytenr, level - 1, 1,
 				       &wc->refs[level - 1],
 				       &wc->flags[level - 1]);
-	if (ret < 0) {
-		btrfs_tree_unlock(next);
-		return ret;
-	}
+	if (ret < 0)
+		goto out_unlock;
 
 	if (unlikely(wc->refs[level - 1] == 0)) {
 		btrfs_err(root->fs_info, "Missing references.");
-		BUG();
+		ret = -EIO;
+		goto out_unlock;
 	}
 	*lookup_info = 0;
 
@@ -8943,7 +8944,12 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 	}
 
 	level--;
-	BUG_ON(level != btrfs_header_level(next));
+	ASSERT(level == btrfs_header_level(next));
+	if (level != btrfs_header_level(next)) {
+		btrfs_err(root->fs_info, "mismatched level");
+		ret = -EIO;
+		goto out_unlock;
+	}
 	path->nodes[level] = next;
 	path->slots[level] = 0;
 	path->locks[level] = BTRFS_WRITE_LOCK_BLOCKING;
@@ -8958,8 +8964,15 @@ skip:
 		if (wc->flags[level] & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
 			parent = path->nodes[level]->start;
 		} else {
-			BUG_ON(root->root_key.objectid !=
+			ASSERT(root->root_key.objectid ==
 			       btrfs_header_owner(path->nodes[level]));
+			if (root->root_key.objectid !=
+			    btrfs_header_owner(path->nodes[level])) {
+				btrfs_err(root->fs_info,
+						"mismatched block owner");
+				ret = -EIO;
+				goto out_unlock;
+			}
 			parent = 0;
 		}
 
@@ -8968,20 +8981,24 @@ skip:
 						     generation, level - 1);
 			if (ret) {
 				btrfs_err_rl(root->fs_info,
-					"Error "
-					"%d accounting shared subtree. Quota "
-					"is out of sync, rescan required.",
-					ret);
+					     "Error %d accounting shared subtree. Quota is out of sync, rescan required.",
+					     ret);
 			}
 		}
 		ret = btrfs_free_extent(trans, root, bytenr, blocksize, parent,
 				root->root_key.objectid, level - 1, 0);
-		BUG_ON(ret); /* -ENOMEM */
+		if (ret)
+			goto out_unlock;
 	}
+
+	*lookup_info = 1;
+	ret = 1;
+
+out_unlock:
 	btrfs_tree_unlock(next);
 	free_extent_buffer(next);
-	*lookup_info = 1;
-	return 1;
+
+	return ret;
 }
 
 /*
@@ -9061,10 +9078,8 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
 			ret = account_leaf_items(trans, root, eb);
 			if (ret) {
 				btrfs_err_rl(root->fs_info,
-					"error "
-					"%d accounting leaf items. Quota "
-					"is out of sync, rescan required.",
-					ret);
+					     "error %d accounting leaf items. Quota is out of sync, rescan required.",
+					     ret);
 			}
 		}
 		/* make block locked assertion in clean_tree_block happy */
@@ -9180,9 +9195,10 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 			 struct btrfs_block_rsv *block_rsv, int update_ref,
 			 int for_reloc)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_path *path;
 	struct btrfs_trans_handle *trans;
-	struct btrfs_root *tree_root = root->fs_info->tree_root;
+	struct btrfs_root *tree_root = fs_info->tree_root;
 	struct btrfs_root_item *root_item = &root->root_item;
 	struct walk_control *wc;
 	struct btrfs_key key;
@@ -9191,7 +9207,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 	int level;
 	bool root_dropped = false;
 
-	btrfs_debug(root->fs_info, "Drop subvolume %llu", root->objectid);
+	btrfs_debug(fs_info, "Drop subvolume %llu", root->objectid);
 
 	path = btrfs_alloc_path();
 	if (!path) {
@@ -9320,7 +9336,8 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 
 			btrfs_end_transaction_throttle(trans, tree_root);
 			if (!for_reloc && btrfs_need_cleaner_sleep(root)) {
-				pr_debug("BTRFS: drop snapshot early exit\n");
+				btrfs_debug(fs_info,
+					    "drop snapshot early exit");
 				err = -EAGAIN;
 				goto out_free;
 			}
@@ -9386,7 +9403,7 @@ out:
 	if (!for_reloc && root_dropped == false)
 		btrfs_add_dead_root(root);
 	if (err && err != -EAGAIN)
-		btrfs_handle_fs_error(root->fs_info, err, NULL);
+		btrfs_handle_fs_error(fs_info, err, NULL);
 	return err;
 }
 
@@ -10020,7 +10037,7 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
 		if (WARN_ON(space_info->bytes_pinned > 0 ||
 			    space_info->bytes_reserved > 0 ||
 			    space_info->bytes_may_use > 0))
-			dump_space_info(space_info, 0, 0);
+			dump_space_info(info, space_info, 0, 0);
 		list_del(&space_info->list);
 		for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
 			struct kobject *kobj;
@@ -10069,7 +10086,8 @@ static void __link_block_group(struct btrfs_space_info *space_info,
 
 	return;
 out_err:
-	pr_warn("BTRFS: failed to add kobject for block cache. ignoring.\n");
+	btrfs_warn(cache->fs_info,
+		   "failed to add kobject for block cache, ignoring");
 }
 
 static struct btrfs_block_group_cache *
@@ -10127,6 +10145,11 @@ int btrfs_read_block_groups(struct btrfs_root *root)
 	struct extent_buffer *leaf;
 	int need_clear = 0;
 	u64 cache_gen;
+	u64 feature;
+	int mixed;
+
+	feature = btrfs_super_incompat_flags(info->super_copy);
+	mixed = !!(feature & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS);
 
 	root = info->extent_root;
 	key.objectid = 0;
@@ -10180,6 +10203,15 @@ int btrfs_read_block_groups(struct btrfs_root *root)
 				   btrfs_item_ptr_offset(leaf, path->slots[0]),
 				   sizeof(cache->item));
 		cache->flags = btrfs_block_group_flags(&cache->item);
+		if (!mixed &&
+		    ((cache->flags & BTRFS_BLOCK_GROUP_METADATA) &&
+		    (cache->flags & BTRFS_BLOCK_GROUP_DATA))) {
+			btrfs_err(info,
+"bg %llu is a mixed block group but filesystem hasn't enabled mixed block groups",
+				  cache->key.objectid);
+			ret = -EINVAL;
+			goto error;
+		}
 
 		key.objectid = found_key.objectid + found_key.offset;
 		btrfs_release_path(path);
@@ -10789,7 +10821,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
 	struct btrfs_trans_handle *trans;
 	int ret = 0;
 
-	if (!fs_info->open)
+	if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags))
 		return;
 
 	spin_lock(&fs_info->unused_bgs_lock);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 44fe66b53c8b..ee40384c394d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -20,6 +20,7 @@
 #include "locking.h"
 #include "rcu-string.h"
 #include "backref.h"
+#include "transaction.h"
 
 static struct kmem_cache *extent_state_cache;
 static struct kmem_cache *extent_buffer_cache;
@@ -74,8 +75,7 @@ void btrfs_leak_debug_check(void)
 
 	while (!list_empty(&buffers)) {
 		eb = list_entry(buffers.next, struct extent_buffer, leak_list);
-		printk(KERN_ERR "BTRFS: buffer leak start %llu len %lu "
-		       "refs %d\n",
+		pr_err("BTRFS: buffer leak start %llu len %lu refs %d\n",
 		       eb->start, eb->len, atomic_read(&eb->refs));
 		list_del(&eb->leak_list);
 		kmem_cache_free(extent_buffer_cache, eb);
@@ -460,8 +460,7 @@ static int insert_state(struct extent_io_tree *tree,
 	if (node) {
 		struct extent_state *found;
 		found = rb_entry(node, struct extent_state, rb_node);
-		printk(KERN_ERR "BTRFS: found node %llu %llu on insert of "
-		       "%llu %llu\n",
+		pr_err("BTRFS: found node %llu %llu on insert of %llu %llu\n",
 		       found->start, found->end, start, end);
 		return -EEXIST;
 	}
@@ -572,9 +571,8 @@ alloc_extent_state_atomic(struct extent_state *prealloc)
 
 static void extent_io_tree_panic(struct extent_io_tree *tree, int err)
 {
-	btrfs_panic(tree_fs_info(tree), err, "Locking error: "
-		    "Extent tree was modified by another "
-		    "thread while locked.");
+	btrfs_panic(tree_fs_info(tree), err,
+		    "Locking error: Extent tree was modified by another thread while locked.");
 }
 
 /*
@@ -1729,7 +1727,7 @@ out_failed:
 }
 
 void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
-				 struct page *locked_page,
+				 u64 delalloc_end, struct page *locked_page,
 				 unsigned clear_bits,
 				 unsigned long page_ops)
 {
@@ -2122,8 +2120,9 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
 
 	if (failrec->in_validation) {
 		/* there was no real error, just free the record */
-		pr_debug("clean_io_failure: freeing dummy error at %llu\n",
-			 failrec->start);
+		btrfs_debug(fs_info,
+			"clean_io_failure: freeing dummy error at %llu",
+			failrec->start);
 		goto out;
 	}
 	if (fs_info->sb->s_flags & MS_RDONLY)
@@ -2189,6 +2188,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 		struct io_failure_record **failrec_ret)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct io_failure_record *failrec;
 	struct extent_map *em;
 	struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
@@ -2236,8 +2236,9 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 						 em->compress_type);
 		}
 
-		pr_debug("Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu\n",
-			 logical, start, failrec->len);
+		btrfs_debug(fs_info,
+			"Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu",
+			logical, start, failrec->len);
 
 		failrec->logical = logical;
 		free_extent_map(em);
@@ -2255,9 +2256,10 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 			return ret;
 		}
 	} else {
-		pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n",
-			 failrec->logical, failrec->start, failrec->len,
-			 failrec->in_validation);
+		btrfs_debug(fs_info,
+			"Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d",
+			failrec->logical, failrec->start, failrec->len,
+			failrec->in_validation);
 		/*
 		 * when data can be on disk more than twice, add to failrec here
 		 * (e.g. with a list for failed_mirror) to make
@@ -2273,18 +2275,19 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
 			   struct io_failure_record *failrec, int failed_mirror)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	int num_copies;
 
-	num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info,
-				      failrec->logical, failrec->len);
+	num_copies = btrfs_num_copies(fs_info, failrec->logical, failrec->len);
 	if (num_copies == 1) {
 		/*
 		 * we only have a single copy of the data, so don't bother with
 		 * all the retry and error correction code that follows. no
 		 * matter what the error is, it is very likely to persist.
 		 */
-		pr_debug("Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -2323,8 +2326,9 @@ int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
 	}
 
 	if (failrec->this_mirror > num_copies) {
-		pr_debug("Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -2415,8 +2419,9 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 	}
 	bio_set_op_attrs(bio, REQ_OP_READ, read_mode);
 
-	pr_debug("Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d\n",
-		 read_mode, failrec->this_mirror, failrec->in_validation);
+	btrfs_debug(btrfs_sb(inode->i_sb),
+		"Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d",
+		read_mode, failrec->this_mirror, failrec->in_validation);
 
 	ret = tree->ops->submit_bio_hook(inode, bio, failrec->this_mirror,
 					 failrec->bio_flags, 0);
@@ -2484,8 +2489,7 @@ static void end_bio_extent_writepage(struct bio *bio)
 					bvec->bv_offset, bvec->bv_len);
 			else
 				btrfs_info(BTRFS_I(page->mapping->host)->root->fs_info,
-				   "incomplete page write in btrfs with offset %u and "
-				   "length %u",
+				   "incomplete page write in btrfs with offset %u and length %u",
 					bvec->bv_offset, bvec->bv_len);
 		}
 
@@ -2541,10 +2545,12 @@ static void end_bio_extent_readpage(struct bio *bio)
 	bio_for_each_segment_all(bvec, bio, i) {
 		struct page *page = bvec->bv_page;
 		struct inode *inode = page->mapping->host;
+		struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 
-		pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, "
-			 "mirror=%u\n", (u64)bio->bi_iter.bi_sector,
-			 bio->bi_error, io_bio->mirror_num);
+		btrfs_debug(fs_info,
+			"end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u",
+			(u64)bio->bi_iter.bi_sector, bio->bi_error,
+			io_bio->mirror_num);
 		tree = &BTRFS_I(inode)->io_tree;
 
 		/* We always issue full-page reads, but if some block
@@ -2554,13 +2560,12 @@ static void end_bio_extent_readpage(struct bio *bio)
 		 * if they don't add up to a full page.  */
 		if (bvec->bv_offset || bvec->bv_len != PAGE_SIZE) {
 			if (bvec->bv_offset + bvec->bv_len != PAGE_SIZE)
-				btrfs_err(BTRFS_I(page->mapping->host)->root->fs_info,
-				   "partial page read in btrfs with offset %u and length %u",
+				btrfs_err(fs_info,
+					"partial page read in btrfs with offset %u and length %u",
 					bvec->bv_offset, bvec->bv_len);
 			else
-				btrfs_info(BTRFS_I(page->mapping->host)->root->fs_info,
-				   "incomplete page read in btrfs with offset %u and "
-				   "length %u",
+				btrfs_info(fs_info,
+					"incomplete page read in btrfs with offset %u and length %u",
 					bvec->bv_offset, bvec->bv_len);
 		}
 
@@ -3624,7 +3629,6 @@ static void end_extent_buffer_writeback(struct extent_buffer *eb)
 static void set_btree_ioerr(struct page *page)
 {
 	struct extent_buffer *eb = (struct extent_buffer *)page->private;
-	struct btrfs_inode *btree_ino = BTRFS_I(eb->fs_info->btree_inode);
 
 	SetPageError(page);
 	if (test_and_set_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags))
@@ -3670,13 +3674,13 @@ static void set_btree_ioerr(struct page *page)
 	 */
 	switch (eb->log_index) {
 	case -1:
-		set_bit(BTRFS_INODE_BTREE_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_BTREE_ERR, &eb->fs_info->flags);
 		break;
 	case 0:
-		set_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_LOG1_ERR, &eb->fs_info->flags);
 		break;
 	case 1:
-		set_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags);
+		set_bit(BTRFS_FS_LOG2_ERR, &eb->fs_info->flags);
 		break;
 	default:
 		BUG(); /* unexpected, logic error */
@@ -3721,8 +3725,10 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
 	struct block_device *bdev = fs_info->fs_devices->latest_bdev;
 	struct extent_io_tree *tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
 	u64 offset = eb->start;
+	u32 nritems;
 	unsigned long i, num_pages;
 	unsigned long bio_flags = 0;
+	unsigned long start, end;
 	int write_flags = (epd->sync_io ? WRITE_SYNC : 0) | REQ_META;
 	int ret = 0;
 
@@ -3732,6 +3738,23 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
 	if (btrfs_header_owner(eb) == BTRFS_TREE_LOG_OBJECTID)
 		bio_flags = EXTENT_BIO_TREE_LOG;
 
+	/* set btree blocks beyond nritems with 0 to avoid stale content. */
+	nritems = btrfs_header_nritems(eb);
+	if (btrfs_header_level(eb) > 0) {
+		end = btrfs_node_key_ptr_offset(nritems);
+
+		memset_extent_buffer(eb, 0, end, eb->len - end);
+	} else {
+		/*
+		 * leaf:
+		 * header 0 1 2 .. N ... data_N .. data_2 data_1 data_0
+		 */
+		start = btrfs_item_nr_offset(nritems);
+		end = btrfs_leaf_data(eb) +
+		      leaf_data_end(fs_info->tree_root, eb);
+		memset_extent_buffer(eb, 0, start, end - start);
+	}
+
 	for (i = 0; i < num_pages; i++) {
 		struct page *p = eb->pages[i];
 
@@ -4487,21 +4510,36 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 			flags |= (FIEMAP_EXTENT_DELALLOC |
 				  FIEMAP_EXTENT_UNKNOWN);
 		} else if (fieinfo->fi_extents_max) {
+			struct btrfs_trans_handle *trans;
+
 			u64 bytenr = em->block_start -
 				(em->start - em->orig_start);
 
 			disko = em->block_start + offset_in_extent;
 
 			/*
+			 * We need a trans handle to get delayed refs
+			 */
+			trans = btrfs_join_transaction(root);
+			/*
+			 * It's OK if we can't start a trans we can still check
+			 * from commit_root
+			 */
+			if (IS_ERR(trans))
+				trans = NULL;
+
+			/*
 			 * As btrfs supports shared space, this information
 			 * can be exported to userspace tools via
 			 * flag FIEMAP_EXTENT_SHARED.  If fi_extents_max == 0
 			 * then we're just getting a count and we can skip the
 			 * lookup stuff.
 			 */
-			ret = btrfs_check_shared(NULL, root->fs_info,
+			ret = btrfs_check_shared(trans, root->fs_info,
 						 root->objectid,
 						 btrfs_ino(inode), bytenr);
+			if (trans)
+				btrfs_end_transaction(trans, root);
 			if (ret < 0)
 				goto out_free;
 			if (ret)
@@ -5173,11 +5211,10 @@ int extent_buffer_uptodate(struct extent_buffer *eb)
 }
 
 int read_extent_buffer_pages(struct extent_io_tree *tree,
-			     struct extent_buffer *eb, u64 start, int wait,
+			     struct extent_buffer *eb, int wait,
 			     get_extent_t *get_extent, int mirror_num)
 {
 	unsigned long i;
-	unsigned long start_i;
 	struct page *page;
 	int err;
 	int ret = 0;
@@ -5191,16 +5228,8 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 	if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))
 		return 0;
 
-	if (start) {
-		WARN_ON(start < eb->start);
-		start_i = (start >> PAGE_SHIFT) -
-			(eb->start >> PAGE_SHIFT);
-	} else {
-		start_i = 0;
-	}
-
 	num_pages = num_extent_pages(eb->start, eb->len);
-	for (i = start_i; i < num_pages; i++) {
+	for (i = 0; i < num_pages; i++) {
 		page = eb->pages[i];
 		if (wait == WAIT_NONE) {
 			if (!trylock_page(page))
@@ -5209,21 +5238,29 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 			lock_page(page);
 		}
 		locked_pages++;
+	}
+	/*
+	 * We need to firstly lock all pages to make sure that
+	 * the uptodate bit of our pages won't be affected by
+	 * clear_extent_buffer_uptodate().
+	 */
+	for (i = 0; i < num_pages; i++) {
+		page = eb->pages[i];
 		if (!PageUptodate(page)) {
 			num_reads++;
 			all_uptodate = 0;
 		}
 	}
+
 	if (all_uptodate) {
-		if (start_i == 0)
-			set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
+		set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
 		goto unlock_exit;
 	}
 
 	clear_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags);
 	eb->read_mirror = 0;
 	atomic_set(&eb->io_pages, num_reads);
-	for (i = start_i; i < num_pages; i++) {
+	for (i = 0; i < num_pages; i++) {
 		page = eb->pages[i];
 
 		if (!PageUptodate(page)) {
@@ -5264,7 +5301,7 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 	if (ret || wait != WAIT_COMPLETE)
 		return ret;
 
-	for (i = start_i; i < num_pages; i++) {
+	for (i = 0; i < num_pages; i++) {
 		page = eb->pages[i];
 		wait_on_page_locked(page);
 		if (!PageUptodate(page))
@@ -5274,12 +5311,10 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 	return ret;
 
 unlock_exit:
-	i = start_i;
 	while (locked_pages > 0) {
-		page = eb->pages[i];
-		i++;
-		unlock_page(page);
 		locked_pages--;
+		page = eb->pages[locked_pages];
+		unlock_page(page);
 	}
 	return ret;
 }
@@ -5382,8 +5417,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
 	}
 
 	if (start + min_len > eb->len) {
-		WARN(1, KERN_ERR "btrfs bad mapping eb start %llu len %lu, "
-		       "wanted %lu %lu\n",
+		WARN(1, KERN_ERR "btrfs bad mapping eb start %llu len %lu, wanted %lu %lu\n",
 		       eb->start, eb->len, start, min_len);
 		return -EINVAL;
 	}
@@ -5713,14 +5747,14 @@ void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
 
 	if (src_offset + len > dst->len) {
 		btrfs_err(dst->fs_info,
-			"memmove bogus src_offset %lu move "
-		       "len %lu dst len %lu", src_offset, len, dst->len);
+			"memmove bogus src_offset %lu move len %lu dst len %lu",
+			 src_offset, len, dst->len);
 		BUG_ON(1);
 	}
 	if (dst_offset + len > dst->len) {
 		btrfs_err(dst->fs_info,
-			"memmove bogus dst_offset %lu move "
-		       "len %lu dst len %lu", dst_offset, len, dst->len);
+			"memmove bogus dst_offset %lu move len %lu dst len %lu",
+			 dst_offset, len, dst->len);
 		BUG_ON(1);
 	}
 
@@ -5760,13 +5794,15 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
 	unsigned long src_i;
 
 	if (src_offset + len > dst->len) {
-		btrfs_err(dst->fs_info, "memmove bogus src_offset %lu move "
-		       "len %lu len %lu", src_offset, len, dst->len);
+		btrfs_err(dst->fs_info,
+			  "memmove bogus src_offset %lu move len %lu len %lu",
+			  src_offset, len, dst->len);
 		BUG_ON(1);
 	}
 	if (dst_offset + len > dst->len) {
-		btrfs_err(dst->fs_info, "memmove bogus dst_offset %lu move "
-		       "len %lu len %lu", dst_offset, len, dst->len);
+		btrfs_err(dst->fs_info,
+			  "memmove bogus dst_offset %lu move len %lu len %lu",
+			  dst_offset, len, dst->len);
 		BUG_ON(1);
 	}
 	if (dst_offset < src_offset) {
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 28cd88fccc7e..4a094f1dc7ef 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -359,7 +359,7 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
 #define WAIT_COMPLETE	1
 #define WAIT_PAGE_LOCK	2
 int read_extent_buffer_pages(struct extent_io_tree *tree,
-			     struct extent_buffer *eb, u64 start, int wait,
+			     struct extent_buffer *eb, int wait,
 			     get_extent_t *get_extent, int mirror_num);
 void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
 
@@ -413,7 +413,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
 void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
 void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
 void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
-				 struct page *locked_page,
+				 u64 delalloc_end, struct page *locked_page,
 				 unsigned bits_to_clear,
 				 unsigned long page_ops);
 struct bio *
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 36f4589e349c..3a14c87d9c92 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -503,7 +503,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
 
 	end_of_last_block = start_pos + num_bytes - 1;
 	err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block,
-					cached);
+					cached, 0);
 	if (err)
 		return err;
 
@@ -1110,13 +1110,25 @@ again:
 
 	leaf = path->nodes[0];
 	btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
-	BUG_ON(key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY);
+	if (key.objectid != ino ||
+	    key.type != BTRFS_EXTENT_DATA_KEY) {
+		ret = -EINVAL;
+		btrfs_abort_transaction(trans, ret);
+		goto out;
+	}
 	fi = btrfs_item_ptr(leaf, path->slots[0],
 			    struct btrfs_file_extent_item);
-	BUG_ON(btrfs_file_extent_type(leaf, fi) !=
-	       BTRFS_FILE_EXTENT_PREALLOC);
+	if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_PREALLOC) {
+		ret = -EINVAL;
+		btrfs_abort_transaction(trans, ret);
+		goto out;
+	}
 	extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
-	BUG_ON(key.offset > start || extent_end < end);
+	if (key.offset > start || extent_end < end) {
+		ret = -EINVAL;
+		btrfs_abort_transaction(trans, ret);
+		goto out;
+	}
 
 	bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
 	num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi);
@@ -1213,12 +1225,19 @@ again:
 		ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
 					   root->root_key.objectid,
 					   ino, orig_offset);
-		BUG_ON(ret); /* -ENOMEM */
+		if (ret) {
+			btrfs_abort_transaction(trans, ret);
+			goto out;
+		}
 
 		if (split == start) {
 			key.offset = start;
 		} else {
-			BUG_ON(start != key.offset);
+			if (start != key.offset) {
+				ret = -EINVAL;
+				btrfs_abort_transaction(trans, ret);
+				goto out;
+			}
 			path->slots[0]--;
 			extent_end = end;
 		}
@@ -1240,7 +1259,10 @@ again:
 		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
 					0, root->root_key.objectid,
 					ino, orig_offset);
-		BUG_ON(ret); /* -ENOMEM */
+		if (ret) {
+			btrfs_abort_transaction(trans, ret);
+			goto out;
+		}
 	}
 	other_start = 0;
 	other_end = start;
@@ -1257,7 +1279,10 @@ again:
 		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
 					0, root->root_key.objectid,
 					ino, orig_offset);
-		BUG_ON(ret); /* -ENOMEM */
+		if (ret) {
+			btrfs_abort_transaction(trans, ret);
+			goto out;
+		}
 	}
 	if (del_nr == 0) {
 		fi = btrfs_item_ptr(leaf, path->slots[0],
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index d571bd2b697b..e4b48f377d3a 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -716,8 +716,7 @@ static int __load_free_space_cache(struct btrfs_root *root, struct inode *inode,
 
 	if (BTRFS_I(inode)->generation != generation) {
 		btrfs_err(root->fs_info,
-			"free space inode generation (%llu) "
-			"did not match free space cache generation (%llu)",
+			"free space inode generation (%llu) did not match free space cache generation (%llu)",
 			BTRFS_I(inode)->generation, generation);
 		return 0;
 	}
@@ -879,8 +878,9 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
 
 	if (!matched) {
 		__btrfs_remove_free_space_cache(ctl);
-		btrfs_warn(fs_info, "block group %llu has wrong amount of free space",
-			block_group->key.objectid);
+		btrfs_warn(fs_info,
+			   "block group %llu has wrong amount of free space",
+			   block_group->key.objectid);
 		ret = -1;
 	}
 out:
@@ -891,8 +891,9 @@ out:
 		spin_unlock(&block_group->lock);
 		ret = 0;
 
-		btrfs_warn(fs_info, "failed to load free space cache for block group %llu, rebuilding it now",
-			block_group->key.objectid);
+		btrfs_warn(fs_info,
+			   "failed to load free space cache for block group %llu, rebuilding it now",
+			   block_group->key.objectid);
 	}
 
 	iput(inode);
@@ -2298,7 +2299,8 @@ static void steal_from_bitmap(struct btrfs_free_space_ctl *ctl,
 	}
 }
 
-int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
+int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
+			   struct btrfs_free_space_ctl *ctl,
 			   u64 offset, u64 bytes)
 {
 	struct btrfs_free_space *info;
@@ -2345,7 +2347,7 @@ out:
 	spin_unlock(&ctl->tree_lock);
 
 	if (ret) {
-		printk(KERN_CRIT "BTRFS: unable to add free space :%d\n", ret);
+		btrfs_crit(fs_info, "unable to add free space :%d", ret);
 		ASSERT(ret != -EEXIST);
 	}
 
@@ -2621,7 +2623,8 @@ out:
 	spin_unlock(&ctl->tree_lock);
 
 	if (align_gap_len)
-		__btrfs_add_free_space(ctl, align_gap, align_gap_len);
+		__btrfs_add_free_space(block_group->fs_info, ctl,
+				       align_gap, align_gap_len);
 	return ret;
 }
 
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 3af651c2bbc7..363fdd955e5d 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -89,13 +89,15 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
 			      struct inode *inode);
 
 void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
-int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
+int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
+			   struct btrfs_free_space_ctl *ctl,
 			   u64 bytenr, u64 size);
 static inline int
 btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
 		     u64 bytenr, u64 size)
 {
-	return __btrfs_add_free_space(block_group->free_space_ctl,
+	return __btrfs_add_free_space(block_group->fs_info,
+				      block_group->free_space_ctl,
 				      bytenr, size);
 }
 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 87e7e3d3e676..e4a42a8e4f84 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -107,7 +107,7 @@ search_free_space_info(struct btrfs_trans_handle *trans,
 	if (ret < 0)
 		return ERR_PTR(ret);
 	if (ret != 0) {
-		btrfs_warn(fs_info, "missing free space info for %llu\n",
+		btrfs_warn(fs_info, "missing free space info for %llu",
 			   block_group->key.objectid);
 		ASSERT(0);
 		return ERR_PTR(-ENOENT);
@@ -261,7 +261,8 @@ int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
 	btrfs_release_path(path);
 
 	if (extent_count != expected_extent_count) {
-		btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+		btrfs_err(fs_info,
+			  "incorrect extent count for %llu; counted %u, expected %u",
 			  block_group->key.objectid, extent_count,
 			  expected_extent_count);
 		ASSERT(0);
@@ -442,7 +443,8 @@ int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
 	}
 
 	if (extent_count != expected_extent_count) {
-		btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+		btrfs_err(fs_info,
+			  "incorrect extent count for %llu; counted %u, expected %u",
 			  block_group->key.objectid, extent_count,
 			  expected_extent_count);
 		ASSERT(0);
@@ -1163,7 +1165,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
 
-	fs_info->creating_free_space_tree = 1;
+	set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 	free_space_root = btrfs_create_tree(trans, fs_info,
 					    BTRFS_FREE_SPACE_TREE_OBJECTID);
 	if (IS_ERR(free_space_root)) {
@@ -1183,7 +1185,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	}
 
 	btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
-	fs_info->creating_free_space_tree = 0;
+	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 
 	ret = btrfs_commit_transaction(trans, tree_root);
 	if (ret)
@@ -1192,7 +1194,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 	return 0;
 
 abort:
-	fs_info->creating_free_space_tree = 0;
+	clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
 	btrfs_abort_transaction(trans, ret);
 	btrfs_end_transaction(trans, tree_root);
 	return ret;
@@ -1480,7 +1482,8 @@ static int load_free_space_bitmaps(struct btrfs_caching_control *caching_ctl,
 	}
 
 	if (extent_count != expected_extent_count) {
-		btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+		btrfs_err(fs_info,
+			  "incorrect extent count for %llu; counted %u, expected %u",
 			  block_group->key.objectid, extent_count,
 			  expected_extent_count);
 		ASSERT(0);
@@ -1542,7 +1545,8 @@ static int load_free_space_extents(struct btrfs_caching_control *caching_ctl,
 	}
 
 	if (extent_count != expected_extent_count) {
-		btrfs_err(fs_info, "incorrect extent count for %llu; counted %u, expected %u",
+		btrfs_err(fs_info,
+			  "incorrect extent count for %llu; counted %u, expected %u",
 			  block_group->key.objectid, extent_count,
 			  expected_extent_count);
 		ASSERT(0);
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index 359ee861b5a4..d27014b8bf72 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -104,7 +104,7 @@ again:
 			break;
 
 		if (last != (u64)-1 && last + 1 != key.objectid) {
-			__btrfs_add_free_space(ctl, last + 1,
+			__btrfs_add_free_space(fs_info, ctl, last + 1,
 					       key.objectid - last - 1);
 			wake_up(&root->ino_cache_wait);
 		}
@@ -115,7 +115,7 @@ next:
 	}
 
 	if (last < root->highest_objectid - 1) {
-		__btrfs_add_free_space(ctl, last + 1,
+		__btrfs_add_free_space(fs_info, ctl, last + 1,
 				       root->highest_objectid - last - 1);
 	}
 
@@ -136,12 +136,13 @@ out:
 
 static void start_caching(struct btrfs_root *root)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_free_space_ctl *ctl = root->free_ino_ctl;
 	struct task_struct *tsk;
 	int ret;
 	u64 objectid;
 
-	if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE))
+	if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE))
 		return;
 
 	spin_lock(&root->ino_cache_lock);
@@ -153,7 +154,7 @@ static void start_caching(struct btrfs_root *root)
 	root->ino_cache_state = BTRFS_CACHE_STARTED;
 	spin_unlock(&root->ino_cache_lock);
 
-	ret = load_free_ino_cache(root->fs_info, root);
+	ret = load_free_ino_cache(fs_info, root);
 	if (ret == 1) {
 		spin_lock(&root->ino_cache_lock);
 		root->ino_cache_state = BTRFS_CACHE_FINISHED;
@@ -170,15 +171,15 @@ static void start_caching(struct btrfs_root *root)
 	 */
 	ret = btrfs_find_free_objectid(root, &objectid);
 	if (!ret && objectid <= BTRFS_LAST_FREE_OBJECTID) {
-		__btrfs_add_free_space(ctl, objectid,
+		__btrfs_add_free_space(fs_info, ctl, objectid,
 				       BTRFS_LAST_FREE_OBJECTID - objectid + 1);
 	}
 
 	tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu",
 			  root->root_key.objectid);
 	if (IS_ERR(tsk)) {
-		btrfs_warn(root->fs_info, "failed to start inode caching task");
-		btrfs_clear_pending_and_info(root->fs_info, INODE_MAP_CACHE,
+		btrfs_warn(fs_info, "failed to start inode caching task");
+		btrfs_clear_pending_and_info(fs_info, INODE_MAP_CACHE,
 				"disabling inode map caching");
 	}
 }
@@ -209,28 +210,29 @@ again:
 
 void btrfs_return_ino(struct btrfs_root *root, u64 objectid)
 {
+	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_free_space_ctl *pinned = root->free_ino_pinned;
 
-	if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE))
+	if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE))
 		return;
 again:
 	if (root->ino_cache_state == BTRFS_CACHE_FINISHED) {
-		__btrfs_add_free_space(pinned, objectid, 1);
+		__btrfs_add_free_space(fs_info, pinned, objectid, 1);
 	} else {
-		down_write(&root->fs_info->commit_root_sem);
+		down_write(&fs_info->commit_root_sem);
 		spin_lock(&root->ino_cache_lock);
 		if (root->ino_cache_state == BTRFS_CACHE_FINISHED) {
 			spin_unlock(&root->ino_cache_lock);
-			up_write(&root->fs_info->commit_root_sem);
+			up_write(&fs_info->commit_root_sem);
 			goto again;
 		}
 		spin_unlock(&root->ino_cache_lock);
 
 		start_caching(root);
 
-		__btrfs_add_free_space(pinned, objectid, 1);
+		__btrfs_add_free_space(fs_info, pinned, objectid, 1);
 
-		up_write(&root->fs_info->commit_root_sem);
+		up_write(&fs_info->commit_root_sem);
 	}
 }
 
@@ -277,7 +279,8 @@ void btrfs_unpin_free_ino(struct btrfs_root *root)
 		rb_erase(&info->offset_index, rbroot);
 		spin_unlock(rbroot_lock);
 		if (add_to_ctl)
-			__btrfs_add_free_space(ctl, info->offset, count);
+			__btrfs_add_free_space(root->fs_info, ctl,
+					       info->offset, count);
 		kmem_cache_free(btrfs_free_space_cachep, info);
 	}
 }
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 22a7ca43c7cd..2b790bda7998 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -560,8 +560,9 @@ cont:
 			 * we don't need to create any more async work items.
 			 * Unlock and free up our temp pages.
 			 */
-			extent_clear_unlock_delalloc(inode, start, end, NULL,
-						     clear_flags, PAGE_UNLOCK |
+			extent_clear_unlock_delalloc(inode, start, end, end,
+						     NULL, clear_flags,
+						     PAGE_UNLOCK |
 						     PAGE_CLEAR_DIRTY |
 						     PAGE_SET_WRITEBACK |
 						     page_error_op |
@@ -837,6 +838,8 @@ retry:
 		extent_clear_unlock_delalloc(inode, async_extent->start,
 				async_extent->start +
 				async_extent->ram_size - 1,
+				async_extent->start +
+				async_extent->ram_size - 1,
 				NULL, EXTENT_LOCKED | EXTENT_DELALLOC,
 				PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
 				PAGE_SET_WRITEBACK);
@@ -856,7 +859,8 @@ retry:
 			tree->ops->writepage_end_io_hook(p, start, end,
 							 NULL, 0);
 			p->mapping = NULL;
-			extent_clear_unlock_delalloc(inode, start, end, NULL, 0,
+			extent_clear_unlock_delalloc(inode, start, end, end,
+						     NULL, 0,
 						     PAGE_END_WRITEBACK |
 						     PAGE_SET_ERROR);
 			free_async_extent_pages(async_extent);
@@ -873,6 +877,8 @@ out_free:
 	extent_clear_unlock_delalloc(inode, async_extent->start,
 				     async_extent->start +
 				     async_extent->ram_size - 1,
+				     async_extent->start +
+				     async_extent->ram_size - 1,
 				     NULL, EXTENT_LOCKED | EXTENT_DELALLOC |
 				     EXTENT_DEFRAG | EXTENT_DO_ACCOUNTING,
 				     PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
@@ -966,7 +972,8 @@ static noinline int cow_file_range(struct inode *inode,
 		ret = cow_file_range_inline(root, inode, start, end, 0, 0,
 					    NULL);
 		if (ret == 0) {
-			extent_clear_unlock_delalloc(inode, start, end, NULL,
+			extent_clear_unlock_delalloc(inode, start, end,
+				     delalloc_end, NULL,
 				     EXTENT_LOCKED | EXTENT_DELALLOC |
 				     EXTENT_DEFRAG, PAGE_UNLOCK |
 				     PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK |
@@ -1062,7 +1069,8 @@ static noinline int cow_file_range(struct inode *inode,
 		op |= PAGE_SET_PRIVATE2;
 
 		extent_clear_unlock_delalloc(inode, start,
-					     start + ram_size - 1, locked_page,
+					     start + ram_size - 1,
+					     delalloc_end, locked_page,
 					     EXTENT_LOCKED | EXTENT_DELALLOC,
 					     op);
 		disk_num_bytes -= cur_alloc_size;
@@ -1079,7 +1087,8 @@ out_reserve:
 	btrfs_dec_block_group_reservations(root->fs_info, ins.objectid);
 	btrfs_free_reserved_extent(root, ins.objectid, ins.offset, 1);
 out_unlock:
-	extent_clear_unlock_delalloc(inode, start, end, locked_page,
+	extent_clear_unlock_delalloc(inode, start, end, delalloc_end,
+				     locked_page,
 				     EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
 				     EXTENT_DELALLOC | EXTENT_DEFRAG,
 				     PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
@@ -1258,7 +1267,8 @@ static noinline int run_delalloc_nocow(struct inode *inode,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		extent_clear_unlock_delalloc(inode, start, end, locked_page,
+		extent_clear_unlock_delalloc(inode, start, end, end,
+					     locked_page,
 					     EXTENT_LOCKED | EXTENT_DELALLOC |
 					     EXTENT_DO_ACCOUNTING |
 					     EXTENT_DEFRAG, PAGE_UNLOCK |
@@ -1276,7 +1286,8 @@ static noinline int run_delalloc_nocow(struct inode *inode,
 		trans = btrfs_join_transaction(root);
 
 	if (IS_ERR(trans)) {
-		extent_clear_unlock_delalloc(inode, start, end, locked_page,
+		extent_clear_unlock_delalloc(inode, start, end, end,
+					     locked_page,
 					     EXTENT_LOCKED | EXTENT_DELALLOC |
 					     EXTENT_DO_ACCOUNTING |
 					     EXTENT_DEFRAG, PAGE_UNLOCK |
@@ -1490,7 +1501,7 @@ out_check:
 		}
 
 		extent_clear_unlock_delalloc(inode, cur_offset,
-					     cur_offset + num_bytes - 1,
+					     cur_offset + num_bytes - 1, end,
 					     locked_page, EXTENT_LOCKED |
 					     EXTENT_DELALLOC |
 					     EXTENT_CLEAR_DATA_RESV,
@@ -1522,7 +1533,7 @@ error:
 		ret = err;
 
 	if (ret && cur_offset < end)
-		extent_clear_unlock_delalloc(inode, cur_offset, end,
+		extent_clear_unlock_delalloc(inode, cur_offset, end, end,
 					     locked_page, EXTENT_LOCKED |
 					     EXTENT_DELALLOC | EXTENT_DEFRAG |
 					     EXTENT_DO_ACCOUNTING, PAGE_UNLOCK |
@@ -1988,7 +1999,7 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
 }
 
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
-			      struct extent_state **cached_state)
+			      struct extent_state **cached_state, int dedupe)
 {
 	WARN_ON((end & (PAGE_SIZE - 1)) == 0);
 	return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
@@ -2052,7 +2063,8 @@ again:
 		goto out;
 	 }
 
-	btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state);
+	btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state,
+				  0);
 	ClearPageChecked(page);
 	set_page_dirty(page);
 out:
@@ -2309,7 +2321,7 @@ static noinline int record_one_backref(u64 inum, u64 offset, u64 root_id,
 		if (PTR_ERR(root) == -ENOENT)
 			return 0;
 		WARN_ON(1);
-		pr_debug("inum=%llu, offset=%llu, root_id=%llu\n",
+		btrfs_debug(fs_info, "inum=%llu, offset=%llu, root_id=%llu",
 			 inum, offset, root_id);
 		return PTR_ERR(root);
 	}
@@ -3936,7 +3948,7 @@ noinline int btrfs_update_inode(struct btrfs_trans_handle *trans,
 	 */
 	if (!btrfs_is_free_space_inode(inode)
 	    && root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
-	    && !root->fs_info->log_root_recovering) {
+	    && !test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags)) {
 		btrfs_update_root_times(trans, root);
 
 		ret = btrfs_delayed_update_inode(trans, root, inode);
@@ -4757,7 +4769,7 @@ again:
 			  0, 0, &cached_state, GFP_NOFS);
 
 	ret = btrfs_set_extent_delalloc(inode, block_start, block_end,
-					&cached_state);
+					&cached_state, 0);
 	if (ret) {
 		unlock_extent_cached(io_tree, block_start, block_end,
 				     &cached_state, GFP_NOFS);
@@ -5223,7 +5235,7 @@ void btrfs_evict_inode(struct inode *inode)
 
 	btrfs_free_io_failure_record(inode, 0, (u64)-1);
 
-	if (root->fs_info->log_root_recovering) {
+	if (test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags)) {
 		BUG_ON(test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
 				 &BTRFS_I(inode)->runtime_flags));
 		goto no_delete;
@@ -7012,8 +7024,9 @@ not_found_em:
 insert:
 	btrfs_release_path(path);
 	if (em->start > start || extent_map_end(em) <= start) {
-		btrfs_err(root->fs_info, "bad extent! em: [%llu %llu] passed [%llu %llu]",
-			em->start, em->len, start, len);
+		btrfs_err(root->fs_info,
+			  "bad extent! em: [%llu %llu] passed [%llu %llu]",
+			  em->start, em->len, start, len);
 		err = -EIO;
 		goto out;
 	}
@@ -7865,18 +7878,19 @@ static int btrfs_check_dio_repairable(struct inode *inode,
 				      struct io_failure_record *failrec,
 				      int failed_mirror)
 {
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	int num_copies;
 
-	num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info,
-				      failrec->logical, failrec->len);
+	num_copies = btrfs_num_copies(fs_info, failrec->logical, failrec->len);
 	if (num_copies == 1) {
 		/*
 		 * we only have a single copy of the data, so don't bother with
 		 * all the retry and error correction code that follows. no
 		 * matter what the error is, it is very likely to persist.
 		 */
-		pr_debug("Check DIO Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check DIO Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -7886,8 +7900,9 @@ static int btrfs_check_dio_repairable(struct inode *inode,
 		failrec->this_mirror++;
 
 	if (failrec->this_mirror > num_copies) {
-		pr_debug("Check DIO Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d\n",
-			 num_copies, failrec->this_mirror, failed_mirror);
+		btrfs_debug(fs_info,
+			"Check DIO Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d",
+			num_copies, failrec->this_mirror, failed_mirror);
 		return 0;
 	}
 
@@ -9055,7 +9070,7 @@ again:
 			  0, 0, &cached_state, GFP_NOFS);
 
 	ret = btrfs_set_extent_delalloc(inode, page_start, end,
-					&cached_state);
+					&cached_state, 0);
 	if (ret) {
 		unlock_extent_cached(io_tree, page_start, page_end,
 				     &cached_state, GFP_NOFS);
@@ -9377,8 +9392,9 @@ void btrfs_destroy_inode(struct inode *inode)
 		if (!ordered)
 			break;
 		else {
-			btrfs_err(root->fs_info, "found ordered extent %llu %llu on inode cleanup",
-				ordered->file_offset, ordered->len);
+			btrfs_err(root->fs_info,
+				  "found ordered extent %llu %llu on inode cleanup",
+				  ordered->file_offset, ordered->len);
 			btrfs_remove_ordered_extent(inode, ordered);
 			btrfs_put_ordered_extent(ordered);
 			btrfs_put_ordered_extent(ordered);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b182197f7091..18e1aa0f85f5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1903,8 +1903,9 @@ static noinline int may_destroy_subvol(struct btrfs_root *root)
 		btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key);
 		if (key.objectid == root->root_key.objectid) {
 			ret = -EPERM;
-			btrfs_err(root->fs_info, "deleting default subvolume "
-				  "%llu is not allowed", key.objectid);
+			btrfs_err(root->fs_info,
+				  "deleting default subvolume %llu is not allowed",
+				  key.objectid);
 			goto out;
 		}
 		btrfs_release_path(path);
@@ -4097,8 +4098,8 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
 	if (IS_ERR_OR_NULL(di)) {
 		btrfs_free_path(path);
 		btrfs_end_transaction(trans, root);
-		btrfs_err(new_root->fs_info, "Umm, you don't have the default dir"
-			   "item, this isn't going to work");
+		btrfs_err(new_root->fs_info,
+			  "Umm, you don't have the default diritem, this isn't going to work");
 		ret = -ENOENT;
 		goto out;
 	}
@@ -5307,8 +5308,9 @@ static int btrfs_ioctl_set_fslabel(struct file *file, void __user *arg)
 		return -EFAULT;
 
 	if (strnlen(label, BTRFS_LABEL_SIZE) == BTRFS_LABEL_SIZE) {
-		btrfs_err(root->fs_info, "unable to set label with more than %d bytes",
-		       BTRFS_LABEL_SIZE - 1);
+		btrfs_err(root->fs_info,
+			  "unable to set label with more than %d bytes",
+			  BTRFS_LABEL_SIZE - 1);
 		return -EINVAL;
 	}
 
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index 1adfbe7be6b8..48655da0f4ca 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -141,7 +141,7 @@ static int lzo_compress_pages(struct list_head *ws,
 		ret = lzo1x_1_compress(data_in, in_len, workspace->cbuf,
 				       &out_len, workspace->mem);
 		if (ret != LZO_E_OK) {
-			printk(KERN_DEBUG "BTRFS: deflate in loop returned %d\n",
+			pr_debug("BTRFS: deflate in loop returned %d\n",
 			       ret);
 			ret = -EIO;
 			goto out;
@@ -356,7 +356,7 @@ cont:
 		if (need_unmap)
 			kunmap(pages_in[page_in_index - 1]);
 		if (ret != LZO_E_OK) {
-			printk(KERN_WARNING "BTRFS: decompress failed\n");
+			pr_warn("BTRFS: decompress failed\n");
 			ret = -EIO;
 			break;
 		}
@@ -402,7 +402,7 @@ static int lzo_decompress(struct list_head *ws, unsigned char *data_in,
 	out_len = PAGE_SIZE;
 	ret = lzo1x_decompress_safe(data_in, in_len, workspace->buf, &out_len);
 	if (ret != LZO_E_OK) {
-		printk(KERN_WARNING "BTRFS: decompress failed!\n");
+		pr_warn("BTRFS: decompress failed!\n");
 		ret = -EIO;
 		goto out;
 	}
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 3b78d38173b3..b2d1e95de7be 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -67,8 +67,8 @@ static void ordered_data_tree_panic(struct inode *inode, int errno,
 					       u64 offset)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
-	btrfs_panic(fs_info, errno, "Inconsistency in ordered tree at offset "
-		    "%llu", offset);
+	btrfs_panic(fs_info, errno,
+		    "Inconsistency in ordered tree at offset %llu", offset);
 }
 
 /*
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 147dc6ca5de1..438575ea8d25 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -24,12 +24,11 @@ static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 {
 	int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 	int i;
-	printk(KERN_INFO "\t\tchunk length %llu owner %llu type %llu "
-	       "num_stripes %d\n",
+	pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
 	       btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
 	       btrfs_chunk_type(eb, chunk), num_stripes);
 	for (i = 0 ; i < num_stripes ; i++) {
-		printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i,
+		pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
 		      btrfs_stripe_devid_nr(eb, chunk, i),
 		      btrfs_stripe_offset_nr(eb, chunk, i));
 	}
@@ -37,8 +36,7 @@ static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 static void print_dev_item(struct extent_buffer *eb,
 			   struct btrfs_dev_item *dev_item)
 {
-	printk(KERN_INFO "\t\tdev item devid %llu "
-	       "total_bytes %llu bytes used %llu\n",
+	pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
 	       btrfs_device_id(eb, dev_item),
 	       btrfs_device_total_bytes(eb, dev_item),
 	       btrfs_device_bytes_used(eb, dev_item));
@@ -46,8 +44,7 @@ static void print_dev_item(struct extent_buffer *eb,
 static void print_extent_data_ref(struct extent_buffer *eb,
 				  struct btrfs_extent_data_ref *ref)
 {
-	printk(KERN_INFO "\t\textent data backref root %llu "
-	       "objectid %llu offset %llu count %u\n",
+	pr_info("\t\textent data backref root %llu objectid %llu offset %llu count %u\n",
 	       btrfs_extent_data_ref_root(eb, ref),
 	       btrfs_extent_data_ref_objectid(eb, ref),
 	       btrfs_extent_data_ref_offset(eb, ref),
@@ -72,7 +69,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		struct btrfs_extent_item_v0 *ei0;
 		BUG_ON(item_size != sizeof(*ei0));
 		ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
-		printk(KERN_INFO "\t\textent refs %u\n",
+		pr_info("\t\textent refs %u\n",
 		       btrfs_extent_refs_v0(eb, ei0));
 		return;
 #else
@@ -83,7 +80,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 	ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 	flags = btrfs_extent_flags(eb, ei);
 
-	printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n",
+	pr_info("\t\textent refs %llu gen %llu flags %llu\n",
 	       btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
 	       flags);
 
@@ -92,8 +89,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		struct btrfs_tree_block_info *info;
 		info = (struct btrfs_tree_block_info *)(ei + 1);
 		btrfs_tree_block_key(eb, info, &key);
-		printk(KERN_INFO "\t\ttree block key (%llu %u %llu) "
-		       "level %d\n",
+		pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
 		       btrfs_disk_key_objectid(&key), key.type,
 		       btrfs_disk_key_offset(&key),
 		       btrfs_tree_block_level(eb, info));
@@ -110,12 +106,10 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 		offset = btrfs_extent_inline_ref_offset(eb, iref);
 		switch (type) {
 		case BTRFS_TREE_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\ttree block backref "
-				"root %llu\n", offset);
+			pr_info("\t\ttree block backref root %llu\n", offset);
 			break;
 		case BTRFS_SHARED_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\tshared block backref "
-				"parent %llu\n", offset);
+			pr_info("\t\tshared block backref parent %llu\n", offset);
 			break;
 		case BTRFS_EXTENT_DATA_REF_KEY:
 			dref = (struct btrfs_extent_data_ref *)(&iref->offset);
@@ -123,8 +117,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 			break;
 		case BTRFS_SHARED_DATA_REF_KEY:
 			sref = (struct btrfs_shared_data_ref *)(iref + 1);
-			printk(KERN_INFO "\t\tshared data backref "
-			       "parent %llu count %u\n",
+			pr_info("\t\tshared data backref parent %llu count %u\n",
 			       offset, btrfs_shared_data_ref_count(eb, sref));
 			break;
 		default:
@@ -141,8 +134,7 @@ static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 	struct btrfs_extent_ref_v0 *ref0;
 
 	ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
-	printk("\t\textent back ref root %llu gen %llu "
-		"owner %llu num_refs %lu\n",
+	printk("\t\textent back ref root %llu gen %llu owner %llu num_refs %lu\n",
 		btrfs_ref_root_v0(eb, ref0),
 		btrfs_ref_generation_v0(eb, ref0),
 		btrfs_ref_objectid_v0(eb, ref0),
@@ -162,7 +154,7 @@ static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 		__le64 subvol_id;
 
 		read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
-		printk(KERN_INFO "\t\tsubvol_id %llu\n",
+		pr_info("\t\tsubvol_id %llu\n",
 		       (unsigned long long)le64_to_cpu(subvol_id));
 		item_size -= sizeof(u64);
 		offset += sizeof(u64);
@@ -196,15 +188,13 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		item = btrfs_item_nr(i);
 		btrfs_item_key_to_cpu(l, &key, i);
 		type = key.type;
-		printk(KERN_INFO "\titem %d key (%llu %u %llu) itemoff %d "
-		       "itemsize %d\n",
+		pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
 			i, key.objectid, type, key.offset,
 			btrfs_item_offset(l, item), btrfs_item_size(l, item));
 		switch (type) {
 		case BTRFS_INODE_ITEM_KEY:
 			ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
-			printk(KERN_INFO "\t\tinode generation %llu size %llu "
-			       "mode %o\n",
+			pr_info("\t\tinode generation %llu size %llu mode %o\n",
 			       btrfs_inode_generation(l, ii),
 			       btrfs_inode_size(l, ii),
 			       btrfs_inode_mode(l, ii));
@@ -212,13 +202,13 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_DIR_ITEM_KEY:
 			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 			btrfs_dir_item_key_to_cpu(l, di, &found_key);
-			printk(KERN_INFO "\t\tdir oid %llu type %u\n",
+			pr_info("\t\tdir oid %llu type %u\n",
 				found_key.objectid,
 				btrfs_dir_type(l, di));
 			break;
 		case BTRFS_ROOT_ITEM_KEY:
 			ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
-			printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
+			pr_info("\t\troot data bytenr %llu refs %u\n",
 				btrfs_disk_root_bytenr(l, ri),
 				btrfs_disk_root_refs(l, ri));
 			break;
@@ -227,10 +217,10 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 			print_extent_item(l, i, type);
 			break;
 		case BTRFS_TREE_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\ttree block backref\n");
+			pr_info("\t\ttree block backref\n");
 			break;
 		case BTRFS_SHARED_BLOCK_REF_KEY:
-			printk(KERN_INFO "\t\tshared block backref\n");
+			pr_info("\t\tshared block backref\n");
 			break;
 		case BTRFS_EXTENT_DATA_REF_KEY:
 			dref = btrfs_item_ptr(l, i,
@@ -240,7 +230,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_SHARED_DATA_REF_KEY:
 			sref = btrfs_item_ptr(l, i,
 					      struct btrfs_shared_data_ref);
-			printk(KERN_INFO "\t\tshared data backref count %u\n",
+			pr_info("\t\tshared data backref count %u\n",
 			       btrfs_shared_data_ref_count(l, sref));
 			break;
 		case BTRFS_EXTENT_DATA_KEY:
@@ -248,17 +238,14 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 					    struct btrfs_file_extent_item);
 			if (btrfs_file_extent_type(l, fi) ==
 			    BTRFS_FILE_EXTENT_INLINE) {
-				printk(KERN_INFO "\t\tinline extent data "
-				       "size %u\n",
+				pr_info("\t\tinline extent data size %u\n",
 				       btrfs_file_extent_inline_len(l, i, fi));
 				break;
 			}
-			printk(KERN_INFO "\t\textent data disk bytenr %llu "
-			       "nr %llu\n",
+			pr_info("\t\textent data disk bytenr %llu nr %llu\n",
 			       btrfs_file_extent_disk_bytenr(l, fi),
 			       btrfs_file_extent_disk_num_bytes(l, fi));
-			printk(KERN_INFO "\t\textent data offset %llu "
-			       "nr %llu ram %llu\n",
+			pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
 			       btrfs_file_extent_offset(l, fi),
 			       btrfs_file_extent_num_bytes(l, fi),
 			       btrfs_file_extent_ram_bytes(l, fi));
@@ -273,7 +260,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_BLOCK_GROUP_ITEM_KEY:
 			bi = btrfs_item_ptr(l, i,
 					    struct btrfs_block_group_item);
-			printk(KERN_INFO "\t\tblock group used %llu\n",
+			pr_info("\t\tblock group used %llu\n",
 			       btrfs_disk_block_group_used(l, bi));
 			break;
 		case BTRFS_CHUNK_ITEM_KEY:
@@ -287,38 +274,36 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 		case BTRFS_DEV_EXTENT_KEY:
 			dev_extent = btrfs_item_ptr(l, i,
 						    struct btrfs_dev_extent);
-			printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
-			       "\t\tchunk objectid %llu chunk offset %llu "
-			       "length %llu\n",
+			pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
 			       btrfs_dev_extent_chunk_tree(l, dev_extent),
 			       btrfs_dev_extent_chunk_objectid(l, dev_extent),
 			       btrfs_dev_extent_chunk_offset(l, dev_extent),
 			       btrfs_dev_extent_length(l, dev_extent));
 			break;
 		case BTRFS_PERSISTENT_ITEM_KEY:
-			printk(KERN_INFO "\t\tpersistent item objectid %llu offset %llu\n",
+			pr_info("\t\tpersistent item objectid %llu offset %llu\n",
 					key.objectid, key.offset);
 			switch (key.objectid) {
 			case BTRFS_DEV_STATS_OBJECTID:
-				printk(KERN_INFO "\t\tdevice stats\n");
+				pr_info("\t\tdevice stats\n");
 				break;
 			default:
-				printk(KERN_INFO "\t\tunknown persistent item\n");
+				pr_info("\t\tunknown persistent item\n");
 			}
 			break;
 		case BTRFS_TEMPORARY_ITEM_KEY:
-			printk(KERN_INFO "\t\ttemporary item objectid %llu offset %llu\n",
+			pr_info("\t\ttemporary item objectid %llu offset %llu\n",
 					key.objectid, key.offset);
 			switch (key.objectid) {
 			case BTRFS_BALANCE_OBJECTID:
-				printk(KERN_INFO "\t\tbalance status\n");
+				pr_info("\t\tbalance status\n");
 				break;
 			default:
-				printk(KERN_INFO "\t\tunknown temporary item\n");
+				pr_info("\t\tunknown temporary item\n");
 			}
 			break;
 		case BTRFS_DEV_REPLACE_KEY:
-			printk(KERN_INFO "\t\tdev replace\n");
+			pr_info("\t\tdev replace\n");
 			break;
 		case BTRFS_UUID_KEY_SUBVOL:
 		case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
@@ -343,12 +328,13 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 		btrfs_print_leaf(root, c);
 		return;
 	}
-	btrfs_info(root->fs_info, "node %llu level %d total ptrs %d free spc %u",
-		btrfs_header_bytenr(c), level, nr,
-		(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
+	btrfs_info(root->fs_info,
+		   "node %llu level %d total ptrs %d free spc %u",
+		   btrfs_header_bytenr(c), level, nr,
+		   (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
 	for (i = 0; i < nr; i++) {
 		btrfs_node_key_to_cpu(c, &key, i);
-		printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
+		pr_info("\tkey %d (%llu %u %llu) block %llu\n",
 		       i, key.objectid, key.type, key.offset,
 		       btrfs_node_blockptr(c, i));
 	}
@@ -356,6 +342,13 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 		struct extent_buffer *next = read_tree_block(root,
 					btrfs_node_blockptr(c, i),
 					btrfs_node_ptr_generation(c, i));
+		if (IS_ERR(next)) {
+			continue;
+		} else if (!extent_buffer_uptodate(next)) {
+			free_extent_buffer(next);
+			continue;
+		}
+
 		if (btrfs_is_leaf(next) &&
 		   level != 1)
 			BUG();
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 8db2e29fdcf4..11f4fffe503e 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -309,7 +309,7 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
 	u64 flags = 0;
 	u64 rescan_progress = 0;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return 0;
 
 	fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS);
@@ -360,8 +360,7 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
 			    fs_info->generation) {
 				flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
 				btrfs_err(fs_info,
-					"qgroup generation mismatch, "
-					"marked as inconsistent");
+					"qgroup generation mismatch, marked as inconsistent");
 			}
 			fs_info->qgroup_flags = btrfs_qgroup_status_flags(l,
 									  ptr);
@@ -463,13 +462,11 @@ next2:
 	}
 out:
 	fs_info->qgroup_flags |= flags;
-	if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) {
-		fs_info->quota_enabled = 0;
-		fs_info->pending_quota_state = 0;
-	} else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN &&
-		   ret >= 0) {
+	if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))
+		clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN &&
+		 ret >= 0)
 		ret = qgroup_rescan_init(fs_info, rescan_progress, 0);
-	}
 	btrfs_free_path(path);
 
 	if (ret < 0) {
@@ -847,7 +844,7 @@ static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
 	}
 	ret = 0;
 out:
-	root->fs_info->pending_quota_state = 0;
+	set_bit(BTRFS_FS_QUOTA_DISABLING, &root->fs_info->flags);
 	btrfs_free_path(path);
 	return ret;
 }
@@ -868,7 +865,7 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans,
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
 	if (fs_info->quota_root) {
-		fs_info->pending_quota_state = 1;
+		set_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags);
 		goto out;
 	}
 
@@ -964,7 +961,7 @@ out_add_root:
 	}
 	spin_lock(&fs_info->qgroup_lock);
 	fs_info->quota_root = quota_root;
-	fs_info->pending_quota_state = 1;
+	set_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags);
 	spin_unlock(&fs_info->qgroup_lock);
 out_free_path:
 	btrfs_free_path(path);
@@ -993,8 +990,8 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
 	if (!fs_info->quota_root)
 		goto out;
-	fs_info->quota_enabled = 0;
-	fs_info->pending_quota_state = 0;
+	clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	set_bit(BTRFS_FS_QUOTA_DISABLING, &fs_info->flags);
 	btrfs_qgroup_wait_for_completion(fs_info, false);
 	spin_lock(&fs_info->qgroup_lock);
 	quota_root = fs_info->quota_root;
@@ -1490,7 +1487,8 @@ int btrfs_qgroup_insert_dirty_extent(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	int ret;
 
-	if (!fs_info->quota_enabled || bytenr == 0 || num_bytes == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)
+	    || bytenr == 0 || num_bytes == 0)
 		return 0;
 	if (WARN_ON(trans == NULL))
 		return -EINVAL;
@@ -1713,7 +1711,7 @@ btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
 	if (old_roots)
 		nr_old_roots = old_roots->nnodes;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		goto out_free;
 	BUG_ON(!fs_info->quota_root);
 
@@ -1833,10 +1831,14 @@ int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
 	if (!quota_root)
 		goto out;
 
-	if (!fs_info->quota_enabled && fs_info->pending_quota_state)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+	    test_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags))
 		start_rescan_worker = 1;
 
-	fs_info->quota_enabled = fs_info->pending_quota_state;
+	if (test_and_clear_bit(BTRFS_FS_QUOTA_ENABLING, &fs_info->flags))
+		set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
+	if (test_and_clear_bit(BTRFS_FS_QUOTA_DISABLING, &fs_info->flags))
+		clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 
 	spin_lock(&fs_info->qgroup_lock);
 	while (!list_empty(&fs_info->dirty_qgroups)) {
@@ -1855,7 +1857,7 @@ int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
 					BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
 		spin_lock(&fs_info->qgroup_lock);
 	}
-	if (fs_info->quota_enabled)
+	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON;
 	else
 		fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON;
@@ -1900,7 +1902,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 	u64 nums;
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		goto out;
 
 	if (!quota_root) {
@@ -1991,8 +1993,9 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 		ret = update_qgroup_limit_item(trans, quota_root, dstgroup);
 		if (ret) {
 			fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
-			btrfs_info(fs_info, "unable to update quota limit for %llu",
-			       dstgroup->qgroupid);
+			btrfs_info(fs_info,
+				   "unable to update quota limit for %llu",
+				   dstgroup->qgroupid);
 			goto unlock;
 		}
 	}
@@ -2226,8 +2229,7 @@ void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
 	if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq)
 		return;
 	btrfs_err(trans->fs_info,
-		"qgroups not uptodate in trans handle %p:  list is%s empty, "
-		"seq is %#x.%x",
+		"qgroups not uptodate in trans handle %p:  list is%s empty, seq is %#x.%x",
 		trans, list_empty(&trans->qgroup_ref_list) ? "" : " not",
 		(u32)(trans->delayed_ref_elem.seq >> 32),
 		(u32)trans->delayed_ref_elem.seq);
@@ -2255,10 +2257,11 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 					 &fs_info->qgroup_rescan_progress,
 					 path, 1, 0);
 
-	pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n",
-		 fs_info->qgroup_rescan_progress.objectid,
-		 fs_info->qgroup_rescan_progress.type,
-		 fs_info->qgroup_rescan_progress.offset, ret);
+	btrfs_debug(fs_info,
+		"current progress key (%llu %u %llu), search_slot ret %d",
+		fs_info->qgroup_rescan_progress.objectid,
+		fs_info->qgroup_rescan_progress.type,
+		fs_info->qgroup_rescan_progress.offset, ret);
 
 	if (ret) {
 		/*
@@ -2347,7 +2350,7 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
 			err = PTR_ERR(trans);
 			break;
 		}
-		if (!fs_info->quota_enabled) {
+		if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) {
 			err = -EINTR;
 		} else {
 			err = qgroup_rescan_leaf(fs_info, path, trans);
@@ -2388,7 +2391,7 @@ out:
 	ret = update_qgroup_status_item(trans, fs_info, fs_info->quota_root);
 	if (ret < 0) {
 		err = ret;
-		btrfs_err(fs_info, "fail to update qgroup status: %d\n", err);
+		btrfs_err(fs_info, "fail to update qgroup status: %d", err);
 	}
 	btrfs_end_transaction(trans, fs_info->quota_root);
 
@@ -2578,8 +2581,8 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len)
 	struct ulist_iterator uiter;
 	int ret;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
-	    len == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid) || len == 0)
 		return 0;
 
 	changeset.bytes_changed = 0;
@@ -2676,8 +2679,8 @@ int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes)
 {
 	int ret;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid) ||
-	    num_bytes == 0)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid) || num_bytes == 0)
 		return 0;
 
 	BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));
@@ -2692,7 +2695,8 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
 {
 	int reserved;
 
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid))
 		return;
 
 	reserved = atomic_xchg(&root->qgroup_meta_rsv, 0);
@@ -2703,7 +2707,8 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
 
 void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
 {
-	if (!root->fs_info->quota_enabled || !is_fstree(root->objectid))
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) ||
+	    !is_fstree(root->objectid))
 		return;
 
 	BUG_ON(num_bytes != round_down(num_bytes, root->nodesize));
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index cd8d302a1f61..d016d4a79864 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -2143,7 +2143,10 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio,
 
 	rbio->faila = find_logical_bio_stripe(rbio, bio);
 	if (rbio->faila == -1) {
-		BUG();
+		btrfs_warn(root->fs_info,
+	"%s could not find the bad stripe in raid56 so that we cannot recover any more (bio has logical %llu len %llu, bbio has map_type %llu)",
+			   __func__, (u64)bio->bi_iter.bi_sector << 9,
+			   (u64)bio->bi_iter.bi_size, bbio->map_type);
 		if (generic_io)
 			btrfs_put_bbio(bbio);
 		kfree(rbio);
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 8428db7cd88f..75bab76739be 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -820,7 +820,7 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 
 	spin_lock(&fs_info->reada_lock);
 	list_for_each_entry(device, &fs_devices->devices, dev_list) {
-		printk(KERN_DEBUG "dev %lld has %d in flight\n", device->devid,
+		btrfs_debug(fs_info, "dev %lld has %d in flight", device->devid,
 			atomic_read(&device->reada_in_flight));
 		index = 0;
 		while (1) {
@@ -829,17 +829,17 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 						     (void **)&zone, index, 1);
 			if (ret == 0)
 				break;
-			printk(KERN_DEBUG "  zone %llu-%llu elems %llu locked "
-				"%d devs", zone->start, zone->end, zone->elems,
-				zone->locked);
+			pr_debug("  zone %llu-%llu elems %llu locked %d devs",
+				    zone->start, zone->end, zone->elems,
+				    zone->locked);
 			for (j = 0; j < zone->ndevs; ++j) {
-				printk(KERN_CONT " %lld",
+				pr_cont(" %lld",
 					zone->devs[j]->devid);
 			}
 			if (device->reada_curr_zone == zone)
-				printk(KERN_CONT " curr off %llu",
+				pr_cont(" curr off %llu",
 					device->reada_next - zone->start);
-			printk(KERN_CONT "\n");
+			pr_cont("\n");
 			index = (zone->end >> PAGE_SHIFT) + 1;
 		}
 		cnt = 0;
@@ -851,21 +851,20 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 						     (void **)&re, index, 1);
 			if (ret == 0)
 				break;
-			printk(KERN_DEBUG
-				"  re: logical %llu size %u empty %d scheduled %d",
+			pr_debug("  re: logical %llu size %u empty %d scheduled %d",
 				re->logical, fs_info->tree_root->nodesize,
 				list_empty(&re->extctl), re->scheduled);
 
 			for (i = 0; i < re->nzones; ++i) {
-				printk(KERN_CONT " zone %llu-%llu devs",
+				pr_cont(" zone %llu-%llu devs",
 					re->zones[i]->start,
 					re->zones[i]->end);
 				for (j = 0; j < re->zones[i]->ndevs; ++j) {
-					printk(KERN_CONT " %lld",
+					pr_cont(" %lld",
 						re->zones[i]->devs[j]->devid);
 				}
 			}
-			printk(KERN_CONT "\n");
+			pr_cont("\n");
 			index = (re->logical >> PAGE_SHIFT) + 1;
 			if (++cnt > 15)
 				break;
@@ -885,20 +884,19 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
 			index = (re->logical >> PAGE_SHIFT) + 1;
 			continue;
 		}
-		printk(KERN_DEBUG
-			"re: logical %llu size %u list empty %d scheduled %d",
+		pr_debug("re: logical %llu size %u list empty %d scheduled %d",
 			re->logical, fs_info->tree_root->nodesize,
 			list_empty(&re->extctl), re->scheduled);
 		for (i = 0; i < re->nzones; ++i) {
-			printk(KERN_CONT " zone %llu-%llu devs",
+			pr_cont(" zone %llu-%llu devs",
 				re->zones[i]->start,
 				re->zones[i]->end);
 			for (j = 0; j < re->zones[i]->ndevs; ++j) {
-				printk(KERN_CONT " %lld",
+				pr_cont(" %lld",
 				       re->zones[i]->devs[j]->devid);
 			}
 		}
-		printk(KERN_CONT "\n");
+		pr_cont("\n");
 		index = (re->logical >> PAGE_SHIFT) + 1;
 	}
 	spin_unlock(&fs_info->reada_lock);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index c0c13dc6fe12..0ec8ffa37ab0 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -337,8 +337,9 @@ static void backref_tree_panic(struct rb_node *rb_node, int errno, u64 bytenr)
 					      rb_node);
 	if (bnode->root)
 		fs_info = bnode->root->fs_info;
-	btrfs_panic(fs_info, errno, "Inconsistency in backref cache "
-		    "found at offset %llu", bytenr);
+	btrfs_panic(fs_info, errno,
+		    "Inconsistency in backref cache found at offset %llu",
+		    bytenr);
 }
 
 /*
@@ -923,9 +924,16 @@ again:
 			path2->slots[level]--;
 
 		eb = path2->nodes[level];
-		WARN_ON(btrfs_node_blockptr(eb, path2->slots[level]) !=
-			cur->bytenr);
-
+		if (btrfs_node_blockptr(eb, path2->slots[level]) !=
+		    cur->bytenr) {
+			btrfs_err(root->fs_info,
+	"couldn't find block (%llu) (level %d) in tree (%llu) with key (%llu %u %llu)",
+				  cur->bytenr, level - 1, root->objectid,
+				  node_key->objectid, node_key->type,
+				  node_key->offset);
+			err = -ENOENT;
+			goto out;
+		}
 		lower = cur;
 		need_check = true;
 		for (; level < BTRFS_MAX_LEVEL; level++) {
@@ -1296,9 +1304,9 @@ static int __must_check __add_reloc_root(struct btrfs_root *root)
 			      node->bytenr, &node->rb_node);
 	spin_unlock(&rc->reloc_root_tree.lock);
 	if (rb_node) {
-		btrfs_panic(root->fs_info, -EEXIST, "Duplicate root found "
-			    "for start=%llu while inserting into relocation "
-			    "tree", node->bytenr);
+		btrfs_panic(root->fs_info, -EEXIST,
+			    "Duplicate root found for start=%llu while inserting into relocation tree",
+			    node->bytenr);
 		kfree(node);
 		return -EEXIST;
 	}
@@ -2350,6 +2358,10 @@ void free_reloc_roots(struct list_head *list)
 	while (!list_empty(list)) {
 		reloc_root = list_entry(list->next, struct btrfs_root,
 					root_list);
+		free_extent_buffer(reloc_root->node);
+		free_extent_buffer(reloc_root->commit_root);
+		reloc_root->node = NULL;
+		reloc_root->commit_root = NULL;
 		__del_reloc_root(reloc_root);
 	}
 }
@@ -2686,11 +2698,15 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 
 		if (!upper->eb) {
 			ret = btrfs_search_slot(trans, root, key, path, 0, 1);
-			if (ret < 0) {
-				err = ret;
+			if (ret) {
+				if (ret < 0)
+					err = ret;
+				else
+					err = -ENOENT;
+
+				btrfs_release_path(path);
 				break;
 			}
-			BUG_ON(ret > 0);
 
 			if (!upper->eb) {
 				upper->eb = path->nodes[upper->level];
@@ -3203,7 +3219,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 			nr++;
 		}
 
-		btrfs_set_extent_delalloc(inode, page_start, page_end, NULL);
+		btrfs_set_extent_delalloc(inode, page_start, page_end, NULL, 0);
 		set_page_dirty(page);
 
 		unlock_extent(&BTRFS_I(inode)->io_tree,
@@ -3952,7 +3968,7 @@ static int qgroup_fix_relocated_data_extents(struct btrfs_trans_handle *trans,
 	struct btrfs_key key;
 	int ret = 0;
 
-	if (!fs_info->quota_enabled)
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return 0;
 
 	/*
@@ -4365,8 +4381,9 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
 		goto out;
 	}
 
-	btrfs_info(extent_root->fs_info, "relocating block group %llu flags %llu",
-	       rc->block_group->key.objectid, rc->block_group->flags);
+	btrfs_info(extent_root->fs_info,
+		   "relocating block group %llu flags %llu",
+		   rc->block_group->key.objectid, rc->block_group->flags);
 
 	btrfs_wait_block_group_reservations(rc->block_group);
 	btrfs_wait_nocow_writers(rc->block_group);
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 091296062456..edae751e870c 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -46,12 +46,7 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
 		!= btrfs_root_generation_v2(item)) {
 		if (btrfs_root_generation_v2(item) != 0) {
 			btrfs_warn(eb->fs_info,
-					"mismatching "
-					"generation and generation_v2 "
-					"found in root item. This root "
-					"was probably mounted with an "
-					"older kernel. Resetting all "
-					"new fields.");
+					"mismatching generation and generation_v2 found in root item. This root was probably mounted with an older kernel. Resetting all new fields.");
 		}
 		need_reset = 1;
 	}
@@ -156,8 +151,9 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
 
 	if (ret != 0) {
 		btrfs_print_leaf(root, path->nodes[0]);
-		btrfs_crit(root->fs_info, "unable to update root key %llu %u %llu",
-		       key->objectid, key->type, key->offset);
+		btrfs_crit(root->fs_info,
+			   "unable to update root key %llu %u %llu",
+			   key->objectid, key->type, key->offset);
 		BUG_ON(1);
 	}
 
@@ -302,8 +298,7 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
 			if (IS_ERR(trans)) {
 				err = PTR_ERR(trans);
 				btrfs_handle_fs_error(tree_root->fs_info, err,
-					    "Failed to start trans to delete "
-					    "orphan item");
+					    "Failed to start trans to delete orphan item");
 				break;
 			}
 			err = btrfs_del_orphan_item(trans, tree_root,
@@ -311,8 +306,7 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
 			btrfs_end_transaction(trans, tree_root);
 			if (err) {
 				btrfs_handle_fs_error(tree_root->fs_info, err,
-					    "Failed to delete root orphan "
-					    "item");
+					    "Failed to delete root orphan item");
 				break;
 			}
 			continue;
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 1d195d2b32c6..fffb9ab8526e 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -575,23 +575,25 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
 	 * hold all of the paths here
 	 */
 	for (i = 0; i < ipath->fspath->elem_cnt; ++i)
-		btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "
-			"%s, sector %llu, root %llu, inode %llu, offset %llu, "
-			"length %llu, links %u (path: %s)", swarn->errstr,
-			swarn->logical, rcu_str_deref(swarn->dev->name),
-			(unsigned long long)swarn->sector, root, inum, offset,
-			min(isize - offset, (u64)PAGE_SIZE), nlink,
-			(char *)(unsigned long)ipath->fspath->val[i]);
+		btrfs_warn_in_rcu(fs_info,
+				  "%s at logical %llu on dev %s, sector %llu, root %llu, inode %llu, offset %llu, length %llu, links %u (path: %s)",
+				  swarn->errstr, swarn->logical,
+				  rcu_str_deref(swarn->dev->name),
+				  (unsigned long long)swarn->sector,
+				  root, inum, offset,
+				  min(isize - offset, (u64)PAGE_SIZE), nlink,
+				  (char *)(unsigned long)ipath->fspath->val[i]);
 
 	free_ipath(ipath);
 	return 0;
 
 err:
-	btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "
-		"%s, sector %llu, root %llu, inode %llu, offset %llu: path "
-		"resolving failed with ret=%d", swarn->errstr,
-		swarn->logical, rcu_str_deref(swarn->dev->name),
-		(unsigned long long)swarn->sector, root, inum, offset, ret);
+	btrfs_warn_in_rcu(fs_info,
+			  "%s at logical %llu on dev %s, sector %llu, root %llu, inode %llu, offset %llu: path resolving failed with ret=%d",
+			  swarn->errstr, swarn->logical,
+			  rcu_str_deref(swarn->dev->name),
+			  (unsigned long long)swarn->sector,
+			  root, inum, offset, ret);
 
 	free_ipath(ipath);
 	return 0;
@@ -645,9 +647,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
 						      item_size, &ref_root,
 						      &ref_level);
 			btrfs_warn_in_rcu(fs_info,
-				"%s at logical %llu on dev %s, "
-				"sector %llu: metadata %s (level %d) in tree "
-				"%llu", errstr, swarn.logical,
+				"%s at logical %llu on dev %s, sector %llu: metadata %s (level %d) in tree %llu",
+				errstr, swarn.logical,
 				rcu_str_deref(dev->name),
 				(unsigned long long)swarn.sector,
 				ref_level ? "node" : "leaf",
@@ -1574,8 +1575,7 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
 
 		if (!page_bad->dev->bdev) {
 			btrfs_warn_rl(sblock_bad->sctx->dev_root->fs_info,
-				"scrub_repair_page_from_good_copy(bdev == NULL) "
-				"is unexpected");
+				"scrub_repair_page_from_good_copy(bdev == NULL) is unexpected");
 			return -EIO;
 		}
 
@@ -2961,7 +2961,8 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
 			    (key.objectid < logic_start ||
 			     key.objectid + bytes >
 			     logic_start + map->stripe_len)) {
-				btrfs_err(fs_info, "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
+				btrfs_err(fs_info,
+					  "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
 					  key.objectid, logic_start);
 				spin_lock(&sctx->stat_lock);
 				sctx->stat.uncorrectable_errors++;
@@ -3312,8 +3313,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
 			     key.objectid + bytes >
 			     logical + map->stripe_len)) {
 				btrfs_err(fs_info,
-					   "scrub: tree block %llu spanning "
-					   "stripes, ignored. logical=%llu",
+					   "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
 				       key.objectid, logical);
 				spin_lock(&sctx->stat_lock);
 				sctx->stat.uncorrectable_errors++;
@@ -3640,7 +3640,8 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
 			 */
 			ro_set = 0;
 		} else {
-			btrfs_warn(fs_info, "failed setting block group ro, ret=%d\n",
+			btrfs_warn(fs_info,
+				   "failed setting block group ro, ret=%d\n",
 				   ret);
 			btrfs_put_block_group(cache);
 			break;
@@ -3861,8 +3862,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	if (fs_info->chunk_root->sectorsize != PAGE_SIZE) {
 		/* not supported for data w/o checksums */
 		btrfs_err_rl(fs_info,
-			   "scrub: size assumption sectorsize != PAGE_SIZE "
-			   "(%d != %lu) fails",
+			   "scrub: size assumption sectorsize != PAGE_SIZE (%d != %lu) fails",
 		       fs_info->chunk_root->sectorsize, PAGE_SIZE);
 		return -EINVAL;
 	}
@@ -3875,8 +3875,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		 * would exhaust the array bounds of pagev member in
 		 * struct scrub_block
 		 */
-		btrfs_err(fs_info, "scrub: size assumption nodesize and sectorsize "
-			   "<= SCRUB_MAX_PAGES_PER_BLOCK (%d <= %d && %d <= %d) fails",
+		btrfs_err(fs_info,
+			  "scrub: size assumption nodesize and sectorsize <= SCRUB_MAX_PAGES_PER_BLOCK (%d <= %d && %d <= %d) fails",
 		       fs_info->chunk_root->nodesize,
 		       SCRUB_MAX_PAGES_PER_BLOCK,
 		       fs_info->chunk_root->sectorsize,
@@ -4202,10 +4202,10 @@ static void copy_nocow_pages_worker(struct btrfs_work *work)
 	ret = iterate_inodes_from_logical(logical, fs_info, path,
 					  record_inode_for_nocow, nocow_ctx);
 	if (ret != 0 && ret != -ENOENT) {
-		btrfs_warn(fs_info, "iterate_inodes_from_logical() failed: log %llu, "
-			"phys %llu, len %llu, mir %u, ret %d",
-			logical, physical_for_dev_replace, len, mirror_num,
-			ret);
+		btrfs_warn(fs_info,
+			   "iterate_inodes_from_logical() failed: log %llu, phys %llu, len %llu, mir %u, ret %d",
+			   logical, physical_for_dev_replace, len, mirror_num,
+			   ret);
 		not_written = 1;
 		goto out;
 	}
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 1379e59277e2..01bc36cec26e 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -36,10 +36,6 @@
 #include "transaction.h"
 #include "compression.h"
 
-static int g_verbose = 0;
-
-#define verbose_printk(...) if (g_verbose) printk(__VA_ARGS__)
-
 /*
  * A fs_path is a helper to dynamically build path names with unknown size.
  * It reallocates the internal buffer on demand.
@@ -727,9 +723,10 @@ static int send_cmd(struct send_ctx *sctx)
 static int send_rename(struct send_ctx *sctx,
 		     struct fs_path *from, struct fs_path *to)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_rename %s -> %s\n", from->start, to->start);
+	btrfs_debug(fs_info, "send_rename %s -> %s", from->start, to->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_RENAME);
 	if (ret < 0)
@@ -751,9 +748,10 @@ out:
 static int send_link(struct send_ctx *sctx,
 		     struct fs_path *path, struct fs_path *lnk)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_link %s -> %s\n", path->start, lnk->start);
+	btrfs_debug(fs_info, "send_link %s -> %s", path->start, lnk->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_LINK);
 	if (ret < 0)
@@ -774,9 +772,10 @@ out:
  */
 static int send_unlink(struct send_ctx *sctx, struct fs_path *path)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_unlink %s\n", path->start);
+	btrfs_debug(fs_info, "send_unlink %s", path->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_UNLINK);
 	if (ret < 0)
@@ -796,9 +795,10 @@ out:
  */
 static int send_rmdir(struct send_ctx *sctx, struct fs_path *path)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 
-verbose_printk("btrfs: send_rmdir %s\n", path->start);
+	btrfs_debug(fs_info, "send_rmdir %s", path->start);
 
 	ret = begin_cmd(sctx, BTRFS_SEND_C_RMDIR);
 	if (ret < 0)
@@ -1313,6 +1313,7 @@ static int find_extent_clone(struct send_ctx *sctx,
 			     u64 ino_size,
 			     struct clone_root **found)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret;
 	int extent_type;
 	u64 logical;
@@ -1371,10 +1372,10 @@ static int find_extent_clone(struct send_ctx *sctx,
 	}
 	logical = disk_byte + btrfs_file_extent_offset(eb, fi);
 
-	down_read(&sctx->send_root->fs_info->commit_root_sem);
-	ret = extent_from_logical(sctx->send_root->fs_info, disk_byte, tmp_path,
+	down_read(&fs_info->commit_root_sem);
+	ret = extent_from_logical(fs_info, disk_byte, tmp_path,
 				  &found_key, &flags);
-	up_read(&sctx->send_root->fs_info->commit_root_sem);
+	up_read(&fs_info->commit_root_sem);
 	btrfs_release_path(tmp_path);
 
 	if (ret < 0)
@@ -1429,7 +1430,7 @@ static int find_extent_clone(struct send_ctx *sctx,
 		extent_item_pos = logical - found_key.objectid;
 	else
 		extent_item_pos = 0;
-	ret = iterate_extent_inodes(sctx->send_root->fs_info,
+	ret = iterate_extent_inodes(fs_info,
 					found_key.objectid, extent_item_pos, 1,
 					__iterate_backrefs, backref_ctx);
 
@@ -1439,20 +1440,18 @@ static int find_extent_clone(struct send_ctx *sctx,
 	if (!backref_ctx->found_itself) {
 		/* found a bug in backref code? */
 		ret = -EIO;
-		btrfs_err(sctx->send_root->fs_info, "did not find backref in "
-				"send_root. inode=%llu, offset=%llu, "
-				"disk_byte=%llu found extent=%llu",
-				ino, data_offset, disk_byte, found_key.objectid);
+		btrfs_err(fs_info,
+			  "did not find backref in send_root. inode=%llu, offset=%llu, disk_byte=%llu found extent=%llu",
+			  ino, data_offset, disk_byte, found_key.objectid);
 		goto out;
 	}
 
-verbose_printk(KERN_DEBUG "btrfs: find_extent_clone: data_offset=%llu, "
-		"ino=%llu, "
-		"num_bytes=%llu, logical=%llu\n",
-		data_offset, ino, num_bytes, logical);
+	btrfs_debug(fs_info,
+		    "find_extent_clone: data_offset=%llu, ino=%llu, num_bytes=%llu, logical=%llu",
+		    data_offset, ino, num_bytes, logical);
 
 	if (!backref_ctx->found)
-		verbose_printk("btrfs:    no clones found\n");
+		btrfs_debug(fs_info, "no clones found");
 
 	cur_clone_root = NULL;
 	for (i = 0; i < sctx->clone_roots_cnt; i++) {
@@ -2423,10 +2422,11 @@ out:
 
 static int send_truncate(struct send_ctx *sctx, u64 ino, u64 gen, u64 size)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_truncate %llu size=%llu\n", ino, size);
+	btrfs_debug(fs_info, "send_truncate %llu size=%llu", ino, size);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2452,10 +2452,11 @@ out:
 
 static int send_chmod(struct send_ctx *sctx, u64 ino, u64 gen, u64 mode)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_chmod %llu mode=%llu\n", ino, mode);
+	btrfs_debug(fs_info, "send_chmod %llu mode=%llu", ino, mode);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2481,10 +2482,12 @@ out:
 
 static int send_chown(struct send_ctx *sctx, u64 ino, u64 gen, u64 uid, u64 gid)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 
-verbose_printk("btrfs: send_chown %llu uid=%llu, gid=%llu\n", ino, uid, gid);
+	btrfs_debug(fs_info, "send_chown %llu uid=%llu, gid=%llu",
+		    ino, uid, gid);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2511,6 +2514,7 @@ out:
 
 static int send_utimes(struct send_ctx *sctx, u64 ino, u64 gen)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p = NULL;
 	struct btrfs_inode_item *ii;
@@ -2519,7 +2523,7 @@ static int send_utimes(struct send_ctx *sctx, u64 ino, u64 gen)
 	struct btrfs_key key;
 	int slot;
 
-verbose_printk("btrfs: send_utimes %llu\n", ino);
+	btrfs_debug(fs_info, "send_utimes %llu", ino);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -2573,6 +2577,7 @@ out:
  */
 static int send_create_inode(struct send_ctx *sctx, u64 ino)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 	int cmd;
@@ -2580,7 +2585,7 @@ static int send_create_inode(struct send_ctx *sctx, u64 ino)
 	u64 mode;
 	u64 rdev;
 
-verbose_printk("btrfs: send_create_inode %llu\n", ino);
+	btrfs_debug(fs_info, "send_create_inode %llu", ino);
 
 	p = fs_path_alloc();
 	if (!p)
@@ -3638,6 +3643,7 @@ out:
  */
 static int process_recorded_refs(struct send_ctx *sctx, int *pending_move)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct recorded_ref *cur;
 	struct recorded_ref *cur2;
@@ -3650,7 +3656,7 @@ static int process_recorded_refs(struct send_ctx *sctx, int *pending_move)
 	u64 last_dir_ino_rm = 0;
 	bool can_rename = true;
 
-verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino);
+	btrfs_debug(fs_info, "process_recorded_refs %llu", sctx->cur_ino);
 
 	/*
 	 * This should never happen as the root dir always has the same ref
@@ -4398,12 +4404,8 @@ static int process_new_xattr(struct send_ctx *sctx)
 
 static int process_deleted_xattr(struct send_ctx *sctx)
 {
-	int ret;
-
-	ret = iterate_dir_item(sctx->parent_root, sctx->right_path,
-			       sctx->cmp_key, __process_deleted_xattr, sctx);
-
-	return ret;
+	return iterate_dir_item(sctx->parent_root, sctx->right_path,
+				sctx->cmp_key, __process_deleted_xattr, sctx);
 }
 
 struct find_xattr_ctx {
@@ -4664,6 +4666,7 @@ out:
  */
 static int send_write(struct send_ctx *sctx, u64 offset, u32 len)
 {
+	struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
 	int ret = 0;
 	struct fs_path *p;
 	ssize_t num_read = 0;
@@ -4672,7 +4675,7 @@ static int send_write(struct send_ctx *sctx, u64 offset, u32 len)
 	if (!p)
 		return -ENOMEM;
 
-verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len);
+	btrfs_debug(fs_info, "send_write offset=%llu, len=%d", offset, len);
 
 	num_read = fill_read_buf(sctx, offset, len);
 	if (num_read <= 0) {
@@ -4714,10 +4717,10 @@ static int send_clone(struct send_ctx *sctx,
 	struct fs_path *p;
 	u64 gen;
 
-verbose_printk("btrfs: send_clone offset=%llu, len=%d, clone_root=%llu, "
-	       "clone_inode=%llu, clone_offset=%llu\n", offset, len,
-		clone_root->root->objectid, clone_root->ino,
-		clone_root->offset);
+	btrfs_debug(sctx->send_root->fs_info,
+		    "send_clone offset=%llu, len=%d, clone_root=%llu, clone_inode=%llu, clone_offset=%llu",
+		    offset, len, clone_root->root->objectid, clone_root->ino,
+		    clone_root->offset);
 
 	p = fs_path_alloc();
 	if (!p)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4071fe2bd098..74ed5aae6cea 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -151,12 +151,11 @@ void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function
 		vaf.fmt = fmt;
 		vaf.va = &args;
 
-		printk(KERN_CRIT
-			"BTRFS: error (device %s) in %s:%d: errno=%d %s (%pV)\n",
+		pr_crit("BTRFS: error (device %s) in %s:%d: errno=%d %s (%pV)\n",
 			sb->s_id, function, line, errno, errstr, &vaf);
 		va_end(args);
 	} else {
-		printk(KERN_CRIT "BTRFS: error (device %s) in %s:%d: errno=%d %s\n",
+		pr_crit("BTRFS: error (device %s) in %s:%d: errno=%d %s\n",
 			sb->s_id, function, line, errno, errstr);
 	}
 #endif
@@ -462,9 +461,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 		case Opt_datasum:
 			if (btrfs_test_opt(info, NODATASUM)) {
 				if (btrfs_test_opt(info, NODATACOW))
-					btrfs_info(root->fs_info, "setting datasum, datacow enabled");
+					btrfs_info(root->fs_info,
+						   "setting datasum, datacow enabled");
 				else
-					btrfs_info(root->fs_info, "setting datasum");
+					btrfs_info(root->fs_info,
+						   "setting datasum");
 			}
 			btrfs_clear_opt(info->mount_opt, NODATACOW);
 			btrfs_clear_opt(info->mount_opt, NODATASUM);
@@ -476,7 +477,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 					btrfs_info(root->fs_info,
 						   "setting nodatacow, compression disabled");
 				} else {
-					btrfs_info(root->fs_info, "setting nodatacow");
+					btrfs_info(root->fs_info,
+						   "setting nodatacow");
 				}
 			}
 			btrfs_clear_opt(info->mount_opt, COMPRESS);
@@ -608,8 +610,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 				info->alloc_start = memparse(num, NULL);
 				mutex_unlock(&info->chunk_mutex);
 				kfree(num);
-				btrfs_info(root->fs_info, "allocations start at %llu",
-					info->alloc_start);
+				btrfs_info(root->fs_info,
+					   "allocations start at %llu",
+					   info->alloc_start);
 			} else {
 				ret = -ENOMEM;
 				goto out;
@@ -762,8 +765,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 				goto out;
 			} else if (intarg >= 0) {
 				info->check_integrity_print_mask = intarg;
-				btrfs_info(root->fs_info, "check_integrity_print_mask 0x%x",
-				       info->check_integrity_print_mask);
+				btrfs_info(root->fs_info,
+					   "check_integrity_print_mask 0x%x",
+					   info->check_integrity_print_mask);
 			} else {
 				ret = -EINVAL;
 				goto out;
@@ -794,19 +798,22 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 			intarg = 0;
 			ret = match_int(&args[0], &intarg);
 			if (ret < 0) {
-				btrfs_err(root->fs_info, "invalid commit interval");
+				btrfs_err(root->fs_info,
+					  "invalid commit interval");
 				ret = -EINVAL;
 				goto out;
 			}
 			if (intarg > 0) {
 				if (intarg > 300) {
-					btrfs_warn(root->fs_info, "excessive commit interval %d",
-							intarg);
+					btrfs_warn(root->fs_info,
+						"excessive commit interval %d",
+						intarg);
 				}
 				info->commit_interval = intarg;
 			} else {
-				btrfs_info(root->fs_info, "using default commit interval %ds",
-				    BTRFS_DEFAULT_COMMIT_INTERVAL);
+				btrfs_info(root->fs_info,
+					   "using default commit interval %ds",
+					   BTRFS_DEFAULT_COMMIT_INTERVAL);
 				info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL;
 			}
 			break;
@@ -827,7 +834,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
 			break;
 #endif
 		case Opt_err:
-			btrfs_info(root->fs_info, "unrecognized mount option '%s'", p);
+			btrfs_info(root->fs_info,
+				   "unrecognized mount option '%s'", p);
 			ret = -EINVAL;
 			goto out;
 		default:
@@ -916,9 +924,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
 			}
 			break;
 		case Opt_subvolrootid:
-			printk(KERN_WARNING
-				"BTRFS: 'subvolrootid' mount option is deprecated and has "
-				"no effect\n");
+			pr_warn("BTRFS: 'subvolrootid' mount option is deprecated and has no effect\n");
 			break;
 		case Opt_device:
 			device_name = match_strdup(&args[0]);
@@ -1142,7 +1148,7 @@ static int btrfs_fill_super(struct super_block *sb,
 	sb->s_iflags |= SB_I_CGROUPWB;
 	err = open_ctree(sb, fs_devices, (char *)data);
 	if (err) {
-		printk(KERN_ERR "BTRFS: open_ctree failed\n");
+		btrfs_err(fs_info, "open_ctree failed");
 		return err;
 	}
 
@@ -1440,12 +1446,13 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
 
 	if (!IS_ERR(root)) {
 		struct super_block *s = root->d_sb;
+		struct btrfs_fs_info *fs_info = btrfs_sb(s);
 		struct inode *root_inode = d_inode(root);
 		u64 root_objectid = BTRFS_I(root_inode)->root->root_key.objectid;
 
 		ret = 0;
 		if (!is_subvolume_inode(root_inode)) {
-			pr_err("BTRFS: '%s' is not a valid subvolume\n",
+			btrfs_err(fs_info, "'%s' is not a valid subvolume",
 			       subvol_name);
 			ret = -EINVAL;
 		}
@@ -1455,8 +1462,9 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
 			 * subvolume which was passed by ID is renamed and
 			 * another subvolume is renamed over the old location.
 			 */
-			pr_err("BTRFS: subvol '%s' does not match subvolid %llu\n",
-			       subvol_name, subvol_objectid);
+			btrfs_err(fs_info,
+				  "subvol '%s' does not match subvolid %llu",
+				  subvol_name, subvol_objectid);
 			ret = -EINVAL;
 		}
 		if (ret) {
@@ -1830,13 +1838,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 			btrfs_info(fs_info, "creating UUID tree");
 			ret = btrfs_create_uuid_tree(fs_info);
 			if (ret) {
-				btrfs_warn(fs_info, "failed to create the UUID tree %d", ret);
+				btrfs_warn(fs_info,
+					   "failed to create the UUID tree %d",
+					   ret);
 				goto restore;
 			}
 		}
 		sb->s_flags &= ~MS_RDONLY;
 
-		fs_info->open = 1;
+		set_bit(BTRFS_FS_OPEN, &fs_info->flags);
 	}
 out:
 	wake_up_process(fs_info->transaction_kthread);
@@ -2346,7 +2356,7 @@ static void btrfs_interface_exit(void)
 
 static void btrfs_print_mod_info(void)
 {
-	printk(KERN_INFO "Btrfs loaded, crc32c=%s"
+	pr_info("Btrfs loaded, crc32c=%s"
 #ifdef CONFIG_BTRFS_DEBUG
 			", debug=on"
 #endif
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index c6569905d3d1..1f157fba8940 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -77,7 +77,7 @@ static int can_modify_feature(struct btrfs_feature_attr *fa)
 		clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
 		break;
 	default:
-		printk(KERN_WARNING "btrfs: sysfs: unknown feature set %d\n",
+		pr_warn("btrfs: sysfs: unknown feature set %d\n",
 				fa->feature_set);
 		return 0;
 	}
@@ -430,7 +430,8 @@ static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
 {
 	struct btrfs_fs_info *fs_info = to_fs_info(kobj);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
+	return snprintf(buf, PAGE_SIZE, "%u\n",
+			fs_info->super_copy->sectorsize);
 }
 
 BTRFS_ATTR(sectorsize, btrfs_sectorsize_show);
@@ -440,7 +441,8 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
 {
 	struct btrfs_fs_info *fs_info = to_fs_info(kobj);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
+	return snprintf(buf, PAGE_SIZE, "%u\n",
+			fs_info->super_copy->sectorsize);
 }
 
 BTRFS_ATTR(clone_alignment, btrfs_clone_alignment_show);
@@ -836,9 +838,18 @@ static int btrfs_init_debugfs(void)
 	if (!btrfs_debugfs_root_dentry)
 		return -ENOMEM;
 
-	debugfs_create_u64("test", S_IRUGO | S_IWUGO, btrfs_debugfs_root_dentry,
+	/*
+	 * Example code, how to export data through debugfs.
+	 *
+	 * file:        /sys/kernel/debug/btrfs/test
+	 * contents of: btrfs_debugfs_test
+	 */
+#ifdef CONFIG_BTRFS_DEBUG
+	debugfs_create_u64("test", S_IRUGO | S_IWUSR, btrfs_debugfs_root_dentry,
 			&btrfs_debugfs_test);
 #endif
+
+#endif
 	return 0;
 }
 
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
index 9f72aeda9220..0bf46808ce8f 100644
--- a/fs/btrfs/tests/inode-tests.c
+++ b/fs/btrfs/tests/inode-tests.c
@@ -968,7 +968,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	/* [BTRFS_MAX_EXTENT_SIZE] */
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
-					NULL);
+					NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -984,7 +984,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
 					BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
-					NULL);
+					NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1019,7 +1019,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
 					(BTRFS_MAX_EXTENT_SIZE >> 1)
 					+ sectorsize - 1,
-					NULL);
+					NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1042,7 +1042,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
 			(BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
-			NULL);
+			NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1060,7 +1060,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + sectorsize,
-			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL);
+			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1097,7 +1097,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + sectorsize,
-			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL);
+			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 4407fef7c16c..ca7cb5e6d385 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -480,7 +480,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 	 */
 	root->fs_info->tree_root = root;
 	root->fs_info->quota_root = root;
-	root->fs_info->quota_enabled = 1;
+	set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 
 	/*
 	 * Can't use bytenr 0, some things freak out
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index c294313ea2c8..9517de0e668c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -65,8 +65,9 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
 		BUG_ON(!list_empty(&transaction->list));
 		WARN_ON(!RB_EMPTY_ROOT(&transaction->delayed_refs.href_root));
 		if (transaction->delayed_refs.pending_csums)
-			printk(KERN_ERR "pending csums is %llu\n",
-			       transaction->delayed_refs.pending_csums);
+			btrfs_err(transaction->fs_info,
+				  "pending csums is %llu",
+				  transaction->delayed_refs.pending_csums);
 		while (!list_empty(&transaction->pending_chunks)) {
 			struct extent_map *em;
 
@@ -245,6 +246,7 @@ loop:
 		return -EROFS;
 	}
 
+	cur_trans->fs_info = fs_info;
 	atomic_set(&cur_trans->num_writers, 1);
 	extwriter_counter_init(cur_trans, type);
 	init_waitqueue_head(&cur_trans->writer_wait);
@@ -272,11 +274,9 @@ loop:
 	 */
 	smp_mb();
 	if (!list_empty(&fs_info->tree_mod_seq_list))
-		WARN(1, KERN_ERR "BTRFS: tree_mod_seq_list not empty when "
-			"creating a fresh transaction\n");
+		WARN(1, KERN_ERR "BTRFS: tree_mod_seq_list not empty when creating a fresh transaction\n");
 	if (!RB_EMPTY_ROOT(&fs_info->tree_mod_log))
-		WARN(1, KERN_ERR "BTRFS: tree_mod_log rb tree not empty when "
-			"creating a fresh transaction\n");
+		WARN(1, KERN_ERR "BTRFS: tree_mod_log rb tree not empty when creating a fresh transaction\n");
 	atomic64_set(&fs_info->tree_mod_seq, 0);
 
 	spin_lock_init(&cur_trans->delayed_refs.lock);
@@ -441,7 +441,7 @@ static void wait_current_trans(struct btrfs_root *root)
 
 static int may_wait_transaction(struct btrfs_root *root, int type)
 {
-	if (root->fs_info->log_root_recovering)
+	if (test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags))
 		return 0;
 
 	if (type == TRANS_USERSPACE)
@@ -549,11 +549,8 @@ again:
 		}
 	} while (ret == -EBUSY);
 
-	if (ret < 0) {
-		/* We must get the transaction if we are JOIN_NOLOCK. */
-		BUG_ON(type == TRANS_JOIN_NOLOCK);
+	if (ret < 0)
 		goto join_fail;
-	}
 
 	cur_trans = root->fs_info->running_transaction;
 
@@ -993,7 +990,6 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
 	struct extent_state *cached_state = NULL;
 	u64 start = 0;
 	u64 end;
-	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);
 	bool errors = false;
 
 	while (!find_first_extent_bit(dirty_pages, start, &start, &end,
@@ -1025,17 +1021,17 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
 
 	if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {
 		if ((mark & EXTENT_DIRTY) &&
-		    test_and_clear_bit(BTRFS_INODE_BTREE_LOG1_ERR,
-				       &btree_ino->runtime_flags))
+		    test_and_clear_bit(BTRFS_FS_LOG1_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 
 		if ((mark & EXTENT_NEW) &&
-		    test_and_clear_bit(BTRFS_INODE_BTREE_LOG2_ERR,
-				       &btree_ino->runtime_flags))
+		    test_and_clear_bit(BTRFS_FS_LOG2_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 	} else {
-		if (test_and_clear_bit(BTRFS_INODE_BTREE_ERR,
-				       &btree_ino->runtime_flags))
+		if (test_and_clear_bit(BTRFS_FS_BTREE_ERR,
+				       &root->fs_info->flags))
 			errors = true;
 	}
 
@@ -1300,11 +1296,11 @@ int btrfs_defrag_root(struct btrfs_root *root)
 		btrfs_btree_balance_dirty(info->tree_root);
 		cond_resched();
 
-		if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN)
+		if (btrfs_fs_closing(info) || ret != -EAGAIN)
 			break;
 
-		if (btrfs_defrag_cancelled(root->fs_info)) {
-			pr_debug("BTRFS: defrag_root cancelled\n");
+		if (btrfs_defrag_cancelled(info)) {
+			btrfs_debug(info, "defrag_root cancelled");
 			ret = -EAGAIN;
 			break;
 		}
@@ -1335,7 +1331,7 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans,
 	 * kick in anyway.
 	 */
 	mutex_lock(&fs_info->qgroup_ioctl_lock);
-	if (!fs_info->quota_enabled) {
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) {
 		mutex_unlock(&fs_info->qgroup_ioctl_lock);
 		return 0;
 	}
@@ -1712,7 +1708,7 @@ static void update_super_roots(struct btrfs_root *root)
 	super->root_level = root_item->level;
 	if (btrfs_test_opt(root->fs_info, SPACE_CACHE))
 		super->cache_generation = root_item->generation;
-	if (root->fs_info->update_uuid_tree_gen)
+	if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &root->fs_info->flags))
 		super->uuid_tree_generation = root_item->generation;
 }
 
@@ -1919,7 +1915,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_transaction *cur_trans = trans->transaction;
 	struct btrfs_transaction *prev_trans = NULL;
-	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);
 	int ret;
 
 	/* Stop the commit early if ->aborted is set */
@@ -2213,8 +2208,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 	btrfs_update_commit_device_size(root->fs_info);
 	btrfs_update_commit_device_bytes_used(root, cur_trans);
 
-	clear_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags);
-	clear_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags);
+	clear_bit(BTRFS_FS_LOG1_ERR, &root->fs_info->flags);
+	clear_bit(BTRFS_FS_LOG2_ERR, &root->fs_info->flags);
 
 	btrfs_trans_release_chunk_metadata(trans);
 
@@ -2328,7 +2323,7 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)
 	list_del_init(&root->root_list);
 	spin_unlock(&fs_info->trans_lock);
 
-	pr_debug("BTRFS: cleaner removing %llu\n", root->objectid);
+	btrfs_debug(fs_info, "cleaner removing %llu", root->objectid);
 
 	btrfs_kill_all_delayed_nodes(root);
 
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index efb122643380..6cf0d37d4f76 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -82,6 +82,7 @@ struct btrfs_transaction {
 	spinlock_t dropped_roots_lock;
 	struct btrfs_delayed_ref_root delayed_refs;
 	int aborted;
+	struct btrfs_fs_info *fs_info;
 };
 
 #define __TRANS_FREEZABLE	(1U << 0)
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 8a84ebd8e7cc..528cae123dc9 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -5579,7 +5579,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 	if (!path)
 		return -ENOMEM;
 
-	fs_info->log_root_recovering = 1;
+	set_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags);
 
 	trans = btrfs_start_transaction(fs_info->tree_root, 0);
 	if (IS_ERR(trans)) {
@@ -5592,8 +5592,8 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 
 	ret = walk_log_tree(trans, log_root_tree, &wc);
 	if (ret) {
-		btrfs_handle_fs_error(fs_info, ret, "Failed to pin buffers while "
-			    "recovering log root tree.");
+		btrfs_handle_fs_error(fs_info, ret,
+			"Failed to pin buffers while recovering log root tree.");
 		goto error;
 	}
 
@@ -5639,8 +5639,8 @@ again:
 			free_extent_buffer(log->node);
 			free_extent_buffer(log->commit_root);
 			kfree(log);
-			btrfs_handle_fs_error(fs_info, ret, "Couldn't read target root "
-				    "for tree log recovery.");
+			btrfs_handle_fs_error(fs_info, ret,
+				"Couldn't read target root for tree log recovery.");
 			goto error;
 		}
 
@@ -5689,7 +5689,7 @@ again:
 
 	free_extent_buffer(log_root_tree->node);
 	log_root_tree->log_root = NULL;
-	fs_info->log_root_recovering = 0;
+	clear_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags);
 	kfree(log_root_tree);
 
 	return 0;
diff --git a/fs/btrfs/uuid-tree.c b/fs/btrfs/uuid-tree.c
index 778282944530..7fc89e4adb41 100644
--- a/fs/btrfs/uuid-tree.c
+++ b/fs/btrfs/uuid-tree.c
@@ -69,8 +69,9 @@ static int btrfs_uuid_tree_lookup(struct btrfs_root *uuid_root, u8 *uuid,
 	ret = -ENOENT;
 
 	if (!IS_ALIGNED(item_size, sizeof(u64))) {
-		btrfs_warn(uuid_root->fs_info, "uuid item with illegal size %lu!",
-			(unsigned long)item_size);
+		btrfs_warn(uuid_root->fs_info,
+			   "uuid item with illegal size %lu!",
+			   (unsigned long)item_size);
 		goto out;
 	}
 	while (item_size) {
@@ -137,10 +138,10 @@ int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
 		offset = btrfs_item_ptr_offset(eb, slot);
 		offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
 	} else if (ret < 0) {
-		btrfs_warn(uuid_root->fs_info, "insert uuid item failed %d "
-			"(0x%016llx, 0x%016llx) type %u!",
-			ret, (unsigned long long)key.objectid,
-			(unsigned long long)key.offset, type);
+		btrfs_warn(uuid_root->fs_info,
+			   "insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",
+			   ret, (unsigned long long)key.objectid,
+			   (unsigned long long)key.offset, type);
 		goto out;
 	}
 
@@ -184,8 +185,8 @@ int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
 
 	ret = btrfs_search_slot(trans, uuid_root, &key, path, -1, 1);
 	if (ret < 0) {
-		btrfs_warn(uuid_root->fs_info, "error %d while searching for uuid item!",
-			ret);
+		btrfs_warn(uuid_root->fs_info,
+			   "error %d while searching for uuid item!", ret);
 		goto out;
 	}
 	if (ret > 0) {
@@ -198,8 +199,9 @@ int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
 	offset = btrfs_item_ptr_offset(eb, slot);
 	item_size = btrfs_item_size_nr(eb, slot);
 	if (!IS_ALIGNED(item_size, sizeof(u64))) {
-		btrfs_warn(uuid_root->fs_info, "uuid item with illegal size %lu!",
-			(unsigned long)item_size);
+		btrfs_warn(uuid_root->fs_info,
+			   "uuid item with illegal size %lu!",
+			   (unsigned long)item_size);
 		ret = -ENOENT;
 		goto out;
 	}
@@ -299,8 +301,9 @@ again_search_slot:
 		offset = btrfs_item_ptr_offset(leaf, slot);
 		item_size = btrfs_item_size_nr(leaf, slot);
 		if (!IS_ALIGNED(item_size, sizeof(u64))) {
-			btrfs_warn(fs_info, "uuid item with illegal size %lu!",
-				(unsigned long)item_size);
+			btrfs_warn(fs_info,
+				   "uuid item with illegal size %lu!",
+				   (unsigned long)item_size);
 			goto skip;
 		}
 		while (item_size) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 035efce603a9..71a60cc01451 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -859,7 +859,7 @@ static void btrfs_close_bdev(struct btrfs_device *device)
 		blkdev_put(device->bdev, device->mode);
 }
 
-static void btrfs_close_one_device(struct btrfs_device *device)
+static void btrfs_prepare_close_one_device(struct btrfs_device *device)
 {
 	struct btrfs_fs_devices *fs_devices = device->fs_devices;
 	struct btrfs_device *new_device;
@@ -877,8 +877,6 @@ static void btrfs_close_one_device(struct btrfs_device *device)
 	if (device->missing)
 		fs_devices->missing_devices--;
 
-	btrfs_close_bdev(device);
-
 	new_device = btrfs_alloc_device(NULL, &device->devid,
 					device->uuid);
 	BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
@@ -892,23 +890,39 @@ static void btrfs_close_one_device(struct btrfs_device *device)
 
 	list_replace_rcu(&device->dev_list, &new_device->dev_list);
 	new_device->fs_devices = device->fs_devices;
-
-	call_rcu(&device->rcu, free_device);
 }
 
 static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
 {
 	struct btrfs_device *device, *tmp;
+	struct list_head pending_put;
+
+	INIT_LIST_HEAD(&pending_put);
 
 	if (--fs_devices->opened > 0)
 		return 0;
 
 	mutex_lock(&fs_devices->device_list_mutex);
 	list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
-		btrfs_close_one_device(device);
+		btrfs_prepare_close_one_device(device);
+		list_add(&device->dev_list, &pending_put);
 	}
 	mutex_unlock(&fs_devices->device_list_mutex);
 
+	/*
+	 * btrfs_show_devname() is using the device_list_mutex,
+	 * sometimes call to blkdev_put() leads vfs calling
+	 * into this func. So do put outside of device_list_mutex,
+	 * as of now.
+	 */
+	while (!list_empty(&pending_put)) {
+		device = list_first_entry(&pending_put,
+				struct btrfs_device, dev_list);
+		list_del(&device->dev_list);
+		btrfs_close_bdev(device);
+		call_rcu(&device->rcu, free_device);
+	}
+
 	WARN_ON(fs_devices->open_devices);
 	WARN_ON(fs_devices->rw_devices);
 	fs_devices->opened = 0;
@@ -1140,12 +1154,12 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
 	ret = device_list_add(path, disk_super, devid, fs_devices_ret);
 	if (ret > 0) {
 		if (disk_super->label[0]) {
-			printk(KERN_INFO "BTRFS: device label %s ", disk_super->label);
+			pr_info("BTRFS: device label %s ", disk_super->label);
 		} else {
-			printk(KERN_INFO "BTRFS: device fsid %pU ", disk_super->fsid);
+			pr_info("BTRFS: device fsid %pU ", disk_super->fsid);
 		}
 
-		printk(KERN_CONT "devid %llu transid %llu %s\n", devid, transid, path);
+		pr_cont("devid %llu transid %llu %s\n", devid, transid, path);
 		ret = 0;
 	}
 	if (!ret && fs_devices_ret)
@@ -1846,7 +1860,6 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid)
 	u64 num_devices;
 	int ret = 0;
 	bool clear_super = false;
-	char *dev_name = NULL;
 
 	mutex_lock(&uuid_mutex);
 
@@ -1882,11 +1895,6 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid)
 		list_del_init(&device->dev_alloc_list);
 		device->fs_devices->rw_devices--;
 		unlock_chunks(root);
-		dev_name = kstrdup(device->name->str, GFP_KERNEL);
-		if (!dev_name) {
-			ret = -ENOMEM;
-			goto error_undo;
-		}
 		clear_super = true;
 	}
 
@@ -1936,14 +1944,21 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid)
 		btrfs_sysfs_rm_device_link(root->fs_info->fs_devices, device);
 	}
 
-	btrfs_close_bdev(device);
-
-	call_rcu(&device->rcu, free_device);
-
 	num_devices = btrfs_super_num_devices(root->fs_info->super_copy) - 1;
 	btrfs_set_super_num_devices(root->fs_info->super_copy, num_devices);
 	mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
 
+	/*
+	 * at this point, the device is zero sized and detached from
+	 * the devices list.  All that's left is to zero out the old
+	 * supers and free the device.
+	 */
+	if (device->writeable)
+		btrfs_scratch_superblocks(device->bdev, device->name->str);
+
+	btrfs_close_bdev(device);
+	call_rcu(&device->rcu, free_device);
+
 	if (cur_devices->open_devices == 0) {
 		struct btrfs_fs_devices *fs_devices;
 		fs_devices = root->fs_info->fs_devices;
@@ -1962,24 +1977,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid)
 	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
-	 */
-	if (clear_super) {
-		struct block_device *bdev;
-
-		bdev = blkdev_get_by_path(dev_name, FMODE_READ | FMODE_EXCL,
-						root->fs_info->bdev_holder);
-		if (!IS_ERR(bdev)) {
-			btrfs_scratch_superblocks(bdev, dev_name);
-			blkdev_put(bdev, FMODE_READ | FMODE_EXCL);
-		}
-	}
-
 out:
-	kfree(dev_name);
-
 	mutex_unlock(&uuid_mutex);
 	return ret;
 
@@ -2494,9 +2492,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
 		ret = btrfs_relocate_sys_chunks(root);
 		if (ret < 0)
 			btrfs_handle_fs_error(root->fs_info, ret,
-				    "Failed to relocate sys chunks after "
-				    "device initialization. This can be fixed "
-				    "using the \"btrfs balance\" command.");
+				    "Failed to relocate sys chunks after device initialization. This can be fixed using the \"btrfs balance\" command.");
 		trans = btrfs_attach_transaction(root);
 		if (IS_ERR(trans)) {
 			if (PTR_ERR(trans) == -ENOENT)
@@ -2555,7 +2551,8 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
 	devices = &fs_info->fs_devices->devices;
 	list_for_each_entry(device, devices, dev_list) {
 		if (device->bdev == bdev) {
-			btrfs_err(fs_info, "target device is in the filesystem!");
+			btrfs_err(fs_info,
+				  "target device is in the filesystem!");
 			ret = -EEXIST;
 			goto error;
 		}
@@ -2564,7 +2561,8 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
 
 	if (i_size_read(bdev->bd_inode) <
 	    btrfs_device_get_total_bytes(srcdev)) {
-		btrfs_err(fs_info, "target device is smaller than source device!");
+		btrfs_err(fs_info,
+			  "target device is smaller than source device!");
 		ret = -EINVAL;
 		goto error;
 	}
@@ -3698,7 +3696,7 @@ error:
 	btrfs_free_path(path);
 	if (enospc_errors) {
 		btrfs_info(fs_info, "%d enospc errors during balance",
-		       enospc_errors);
+			   enospc_errors);
 		if (!ret)
 			ret = -ENOSPC;
 	}
@@ -3792,8 +3790,8 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
 		if (!(bctl->flags & BTRFS_BALANCE_DATA) ||
 		    !(bctl->flags & BTRFS_BALANCE_METADATA) ||
 		    memcmp(&bctl->data, &bctl->meta, sizeof(bctl->data))) {
-			btrfs_err(fs_info, "with mixed groups data and "
-				   "metadata balance options must be the same");
+			btrfs_err(fs_info,
+				  "with mixed groups data and metadata balance options must be the same");
 			ret = -EINVAL;
 			goto out;
 		}
@@ -3815,23 +3813,23 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
 		allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
 			    BTRFS_BLOCK_GROUP_RAID6);
 	if (validate_convert_profile(&bctl->data, allowed)) {
-		btrfs_err(fs_info, "unable to start balance with target "
-			   "data profile %llu",
-		       bctl->data.target);
+		btrfs_err(fs_info,
+			  "unable to start balance with target data profile %llu",
+			  bctl->data.target);
 		ret = -EINVAL;
 		goto out;
 	}
 	if (validate_convert_profile(&bctl->meta, allowed)) {
 		btrfs_err(fs_info,
-			   "unable to start balance with target metadata profile %llu",
-		       bctl->meta.target);
+			  "unable to start balance with target metadata profile %llu",
+			  bctl->meta.target);
 		ret = -EINVAL;
 		goto out;
 	}
 	if (validate_convert_profile(&bctl->sys, allowed)) {
 		btrfs_err(fs_info,
-			   "unable to start balance with target system profile %llu",
-		       bctl->sys.target);
+			  "unable to start balance with target system profile %llu",
+			  bctl->sys.target);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -3851,10 +3849,11 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
 		     (fs_info->avail_metadata_alloc_bits & allowed) &&
 		     !(bctl->meta.target & allowed))) {
 			if (bctl->flags & BTRFS_BALANCE_FORCE) {
-				btrfs_info(fs_info, "force reducing metadata integrity");
+				btrfs_info(fs_info,
+					   "force reducing metadata integrity");
 			} else {
-				btrfs_err(fs_info, "balance will reduce metadata "
-					   "integrity, use force if you want this");
+				btrfs_err(fs_info,
+					  "balance will reduce metadata integrity, use force if you want this");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -3864,8 +3863,8 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
 	if (btrfs_get_num_tolerated_disk_barrier_failures(bctl->meta.target) <
 		btrfs_get_num_tolerated_disk_barrier_failures(bctl->data.target)) {
 		btrfs_warn(fs_info,
-	"metadata profile 0x%llx has lower redundancy than data profile 0x%llx",
-			bctl->meta.target, bctl->data.target);
+			   "metadata profile 0x%llx has lower redundancy than data profile 0x%llx",
+			   bctl->meta.target, bctl->data.target);
 	}
 
 	if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
@@ -4221,7 +4220,7 @@ out:
 	if (ret)
 		btrfs_warn(fs_info, "btrfs_uuid_scan_kthread failed %d", ret);
 	else
-		fs_info->update_uuid_tree_gen = 1;
+		set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
 	up(&fs_info->uuid_tree_rescan_sem);
 	return 0;
 }
@@ -4913,15 +4912,16 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
 	read_unlock(&em_tree->lock);
 
 	if (!em) {
-		btrfs_crit(extent_root->fs_info, "unable to find logical "
-			   "%Lu len %Lu", chunk_offset, chunk_size);
+		btrfs_crit(extent_root->fs_info,
+			   "unable to find logical %Lu len %Lu",
+			   chunk_offset, chunk_size);
 		return -EINVAL;
 	}
 
 	if (em->start != chunk_offset || em->len != chunk_size) {
-		btrfs_crit(extent_root->fs_info, "found a bad mapping, wanted"
-			  " %Lu-%Lu, found %Lu-%Lu", chunk_offset,
-			  chunk_size, em->start, em->len);
+		btrfs_crit(extent_root->fs_info,
+			   "found a bad mapping, wanted %Lu-%Lu, found %Lu-%Lu",
+			    chunk_offset, chunk_size, em->start, em->len);
 		free_extent_map(em);
 		return -EINVAL;
 	}
@@ -5154,9 +5154,9 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
 	}
 
 	if (em->start > logical || em->start + em->len < logical) {
-		btrfs_crit(fs_info, "Invalid mapping for %Lu-%Lu, got "
-			    "%Lu-%Lu", logical, logical+len, em->start,
-			    em->start + em->len);
+		btrfs_crit(fs_info, "Invalid mapping for %Lu-%Lu, got %Lu-%Lu",
+			   logical, logical+len, em->start,
+			   em->start + em->len);
 		free_extent_map(em);
 		return 1;
 	}
@@ -5370,9 +5370,9 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int op,
 	}
 
 	if (em->start > logical || em->start + em->len < logical) {
-		btrfs_crit(fs_info, "found a bad mapping, wanted %Lu, "
-			   "found %Lu-%Lu", logical, em->start,
-			   em->start + em->len);
+		btrfs_crit(fs_info,
+			   "found a bad mapping, wanted %Lu, found %Lu-%Lu",
+			   logical, em->start, em->start + em->len);
 		free_extent_map(em);
 		return -EINVAL;
 	}
@@ -5390,9 +5390,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int op,
 
 	stripe_offset = stripe_nr * stripe_len;
 	if (offset < stripe_offset) {
-		btrfs_crit(fs_info, "stripe math has gone wrong, "
-			   "stripe_offset=%llu, offset=%llu, start=%llu, "
-			   "logical=%llu, stripe_len=%llu",
+		btrfs_crit(fs_info,
+			   "stripe math has gone wrong, stripe_offset=%llu, offset=%llu, start=%llu, logical=%llu, stripe_len=%llu",
 			   stripe_offset, offset, em->start, logical,
 			   stripe_len);
 		free_extent_map(em);
@@ -5642,8 +5641,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int op,
 		mirror_num = stripe_index + 1;
 	}
 	if (stripe_index >= map->num_stripes) {
-		btrfs_crit(fs_info, "stripe index math went horribly wrong, "
-			   "got stripe_index=%u, num_stripes=%u",
+		btrfs_crit(fs_info,
+			   "stripe index math went horribly wrong, got stripe_index=%u, num_stripes=%u",
 			   stripe_index, map->num_stripes);
 		ret = -EINVAL;
 		goto out;
@@ -5907,10 +5906,11 @@ int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int op,
 				 mirror_num, need_raid_map);
 }
 
-int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
 		     u64 chunk_start, u64 physical, u64 devid,
 		     u64 **logical, int *naddrs, int *stripe_len)
 {
+	struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
 	struct extent_map_tree *em_tree = &map_tree->map_tree;
 	struct extent_map *em;
 	struct map_lookup *map;
@@ -5926,13 +5926,13 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
 	read_unlock(&em_tree->lock);
 
 	if (!em) {
-		printk(KERN_ERR "BTRFS: couldn't find em for chunk %Lu\n",
-		       chunk_start);
+		btrfs_err(fs_info, "couldn't find em for chunk %Lu",
+			chunk_start);
 		return -EIO;
 	}
 
 	if (em->start != chunk_start) {
-		printk(KERN_ERR "BTRFS: bad chunk start, em=%Lu, wanted=%Lu\n",
+		btrfs_err(fs_info, "bad chunk start, em=%Lu, wanted=%Lu",
 		       em->start, chunk_start);
 		free_extent_map(em);
 		return -EIO;
@@ -6137,10 +6137,12 @@ static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
 
 		rcu_read_lock();
 		name = rcu_dereference(dev->name);
-		pr_debug("btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu "
-			 "(%s id %llu), size=%u\n", bio_op(bio), bio->bi_opf,
-			 (u64)bio->bi_iter.bi_sector, (u_long)dev->bdev->bd_dev,
-			 name->str, dev->devid, bio->bi_iter.bi_size);
+		btrfs_debug(fs_info,
+			"btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
+			bio_op(bio), bio->bi_opf,
+			(u64)bio->bi_iter.bi_sector,
+			(u_long)dev->bdev->bd_dev, name->str, dev->devid,
+			bio->bi_iter.bi_size);
 		rcu_read_unlock();
 	}
 #endif
@@ -6215,8 +6217,9 @@ int btrfs_map_bio(struct btrfs_root *root, struct bio *bio,
 	}
 
 	if (map_length < length) {
-		btrfs_crit(root->fs_info, "mapping failed logical %llu bio len %llu len %llu",
-			logical, length, map_length);
+		btrfs_crit(root->fs_info,
+			   "mapping failed logical %llu bio len %llu len %llu",
+			   logical, length, map_length);
 		BUG();
 	}
 
@@ -6483,8 +6486,9 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
 				free_extent_map(em);
 				return -EIO;
 			}
-			btrfs_warn(root->fs_info, "devid %llu uuid %pU is missing",
-						devid, uuid);
+			btrfs_warn(root->fs_info,
+				   "devid %llu uuid %pU is missing",
+				   devid, uuid);
 		}
 		map->stripes[i].dev->in_fs_metadata = 1;
 	}
@@ -6661,7 +6665,8 @@ static int read_one_dev(struct btrfs_root *root,
 
 int btrfs_read_sys_array(struct btrfs_root *root)
 {
-	struct btrfs_super_block *super_copy = root->fs_info->super_copy;
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_super_block *super_copy = fs_info->super_copy;
 	struct extent_buffer *sb;
 	struct btrfs_disk_key *disk_key;
 	struct btrfs_chunk *chunk;
@@ -6732,8 +6737,8 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 
 			num_stripes = btrfs_chunk_num_stripes(sb, chunk);
 			if (!num_stripes) {
-				printk(KERN_ERR
-	    "BTRFS: invalid number of stripes %u in sys_array at offset %u\n",
+				btrfs_err(fs_info,
+					"invalid number of stripes %u in sys_array at offset %u",
 					num_stripes, cur_offset);
 				ret = -EIO;
 				break;
@@ -6741,7 +6746,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 
 			type = btrfs_chunk_type(sb, chunk);
 			if ((type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
-				btrfs_err(root->fs_info,
+				btrfs_err(fs_info,
 			    "invalid chunk type %llu in sys_array at offset %u",
 					type, cur_offset);
 				ret = -EIO;
@@ -6756,9 +6761,9 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 			if (ret)
 				break;
 		} else {
-			printk(KERN_ERR
-		"BTRFS: unexpected item type %u in sys_array at offset %u\n",
-				(u32)key.type, cur_offset);
+			btrfs_err(fs_info,
+			    "unexpected item type %u in sys_array at offset %u",
+				  (u32)key.type, cur_offset);
 			ret = -EIO;
 			break;
 		}
@@ -6771,7 +6776,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 	return ret;
 
 out_short_read:
-	printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n",
+	btrfs_err(fs_info, "sys_array too short to read %u bytes at offset %u",
 			len, cur_offset);
 	clear_extent_buffer_uptodate(sb);
 	free_extent_buffer_stale(sb);
@@ -7095,10 +7100,12 @@ int btrfs_get_dev_stats(struct btrfs_root *root,
 	mutex_unlock(&fs_devices->device_list_mutex);
 
 	if (!dev) {
-		btrfs_warn(root->fs_info, "get dev_stats failed, device not found");
+		btrfs_warn(root->fs_info,
+			   "get dev_stats failed, device not found");
 		return -ENODEV;
 	} else if (!dev->dev_stats_valid) {
-		btrfs_warn(root->fs_info, "get dev_stats failed, not yet valid");
+		btrfs_warn(root->fs_info,
+			   "get dev_stats failed, not yet valid");
 		return -ENODEV;
 	} else if (stats->flags & BTRFS_DEV_STATS_RESET) {
 		for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++) {
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 6613e6335ca2..09ed29c67848 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -382,7 +382,7 @@ int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int op,
 		     u64 logical, u64 *length,
 		     struct btrfs_bio **bbio_ret, int mirror_num,
 		     int need_raid_map);
-int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
 		     u64 chunk_start, u64 physical, u64 devid,
 		     u64 **logical, int *naddrs, int *stripe_len);
 int btrfs_read_sys_array(struct btrfs_root *root);
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index 88d274e8ecf2..441b81a3e545 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -95,7 +95,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	*total_in = 0;
 
 	if (Z_OK != zlib_deflateInit(&workspace->strm, 3)) {
-		printk(KERN_WARNING "BTRFS: deflateInit failed\n");
+		pr_warn("BTRFS: deflateInit failed\n");
 		ret = -EIO;
 		goto out;
 	}
@@ -123,7 +123,7 @@ static int zlib_compress_pages(struct list_head *ws,
 	while (workspace->strm.total_in < len) {
 		ret = zlib_deflate(&workspace->strm, Z_SYNC_FLUSH);
 		if (ret != Z_OK) {
-			printk(KERN_DEBUG "BTRFS: deflate in loop returned %d\n",
+			pr_debug("BTRFS: deflate in loop returned %d\n",
 			       ret);
 			zlib_deflateEnd(&workspace->strm);
 			ret = -EIO;
@@ -249,7 +249,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {
-		printk(KERN_WARNING "BTRFS: inflateInit failed\n");
+		pr_warn("BTRFS: inflateInit failed\n");
 		return -EIO;
 	}
 	while (workspace->strm.total_in < srclen) {
@@ -339,7 +339,7 @@ static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
 	}
 
 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {
-		printk(KERN_WARNING "BTRFS: inflateInit failed\n");
+		pr_warn("BTRFS: inflateInit failed\n");
 		return -EIO;
 	}