From e1b81e6761bd8419146d4bbe0aadd8b2d348a01c Mon Sep 17 00:00:00 2001
From: Mingming <cmm@us.ibm.com>
Date: Tue, 27 May 2008 10:55:43 -0400
Subject: [PATCH] btrfs delete ordered inode handling fix

Use btrfs_release_file instead of a put_inode call

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 fs/btrfs/file.c         |  7 +++++++
 fs/btrfs/inode.c        | 24 +-----------------------
 fs/btrfs/ordered-data.c | 21 ++++++++++++++-------
 fs/btrfs/ordered-data.h |  2 +-
 fs/btrfs/super.c        |  1 -
 5 files changed, 23 insertions(+), 32 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index d968900c6973..c4fa4664a456 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -978,6 +978,12 @@ out_nolock:
 	return num_written ? num_written : err;
 }
 
+static int btrfs_release_file (struct inode * inode, struct file * filp)
+{
+	btrfs_del_ordered_inode(inode);
+	return 0;
+}
+
 static int btrfs_sync_file(struct file *file,
 			   struct dentry *dentry, int datasync)
 {
@@ -1044,6 +1050,7 @@ struct file_operations btrfs_file_operations = {
 	.write		= btrfs_file_write,
 	.mmap		= btrfs_file_mmap,
 	.open		= generic_file_open,
+	.release	= btrfs_release_file,
 	.fsync		= btrfs_sync_file,
 	.unlocked_ioctl	= btrfs_ioctl,
 #ifdef CONFIG_COMPAT
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 40b4a8ec17fe..1569fb864515 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -857,15 +857,11 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
 	nr = trans->blocks_used;
 
 	if (inode->i_nlink == 0) {
-		int found;
 		/* if the inode isn't linked anywhere,
 		 * we don't need to worry about
 		 * data=ordered
 		 */
-		found = btrfs_del_ordered_inode(inode);
-		if (found == 1) {
-			atomic_dec(&inode->i_count);
-		}
+		btrfs_del_ordered_inode(inode);
 	}
 
 	btrfs_end_transaction(trans, root);
@@ -1271,24 +1267,6 @@ fail:
 	return err;
 }
 
-void btrfs_put_inode(struct inode *inode)
-{
-	int ret;
-
-	if (!BTRFS_I(inode)->ordered_trans) {
-		return;
-	}
-
-	if (mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY) ||
-	    mapping_tagged(inode->i_mapping, PAGECACHE_TAG_WRITEBACK))
-		return;
-
-	ret = btrfs_del_ordered_inode(inode);
-	if (ret == 1) {
-		atomic_dec(&inode->i_count);
-	}
-}
-
 void btrfs_delete_inode(struct inode *inode)
 {
 	struct btrfs_trans_handle *trans;
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 3814cb0246b4..8dd8180183ff 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -231,7 +231,7 @@ int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 	return 1;
 }
 
-static int __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
+static void __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 				     struct inode *inode,
 				     u64 root_objectid, u64 objectid)
 {
@@ -243,31 +243,38 @@ static int __btrfs_del_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 	node = __tree_search(&tree->tree, root_objectid, objectid, &prev);
 	if (!node) {
 		write_unlock(&tree->lock);
-		return 0;
+		return;
 	}
 	rb_erase(node, &tree->tree);
 	BTRFS_I(inode)->ordered_trans = 0;
 	write_unlock(&tree->lock);
+	atomic_dec(&inode->i_count);
 	entry = rb_entry(node, struct tree_entry, rb_node);
 	kfree(entry);
-	return 1;
+	return;
 }
 
-int btrfs_del_ordered_inode(struct inode *inode)
+void btrfs_del_ordered_inode(struct inode *inode)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	u64 root_objectid = root->root_key.objectid;
-	int ret = 0;
+
+	if (!BTRFS_I(inode)->ordered_trans) {
+		return;
+	}
+
+	if (mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY) ||
+	    mapping_tagged(inode->i_mapping, PAGECACHE_TAG_WRITEBACK))
+		return;
 
 	spin_lock(&root->fs_info->new_trans_lock);
 	if (root->fs_info->running_transaction) {
 		struct btrfs_ordered_inode_tree *tree;
 		tree = &root->fs_info->running_transaction->ordered_inode_tree;
-		ret = __btrfs_del_ordered_inode(tree, inode, root_objectid,
+		 __btrfs_del_ordered_inode(tree, inode, root_objectid,
 						inode->i_ino);
 	}
 	spin_unlock(&root->fs_info->new_trans_lock);
-	return ret;
 }
 
 int btrfs_ordered_throttle(struct btrfs_root *root, struct inode *inode)
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 29047e0abaab..c515c4b39996 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -38,6 +38,6 @@ int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 int btrfs_find_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
 				       u64 *root_objectid, u64 *objectid,
 				       struct inode **inode);
-int btrfs_del_ordered_inode(struct inode *inode);
+void btrfs_del_ordered_inode(struct inode *inode);
 int btrfs_ordered_throttle(struct btrfs_root *root, struct inode *inode);
 #endif
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 273a5b511f50..05029656e42e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -487,7 +487,6 @@ static void btrfs_unlockfs(struct super_block *sb)
 
 static struct super_operations btrfs_super_ops = {
 	.delete_inode	= btrfs_delete_inode,
-	.put_inode	= btrfs_put_inode,
 	.put_super	= btrfs_put_super,
 	.write_super	= btrfs_write_super,
 	.sync_fs	= btrfs_sync_fs,
-- 
2.20.1