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Btrfs: avoid orphan inode caused by log replay

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drop_one_dir_item does not properly update inode's link count. It can be
reproduced by executing following commands:

#touch test
#sync
#rm -f test
#dd if=/dev/zero bs=4k count=1 of=test conv=fsync
#echo b > /proc/sysrq-trigger

This fixes it by adding an BTRFS_ORPHAN_ITEM_KEY for the inode

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
This commit is contained in:
Yan Zheng 2009-01-05 15:43:42 -05:00 committed by Chris Mason
parent 2d69a0f884
commit ec051c0f92
1 changed files with 6 additions and 1 deletions
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7
fs/btrfs/tree-log.c
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@ -50,6 +50,9 @@
static int __btrfs_log_inode(struct btrfs_trans_handle *trans, static int __btrfs_log_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode, struct btrfs_root *root, struct inode *inode,
int inode_only); int inode_only);
static int link_to_fixup_dir(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid);
/* /*
* tree logging is a special write ahead log used to make sure that * tree logging is a special write ahead log used to make sure that
@ -638,8 +641,10 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans,
inode = read_one_inode(root, location.objectid); inode = read_one_inode(root, location.objectid);
BUG_ON(!inode); BUG_ON(!inode);
btrfs_inc_nlink(inode); ret = link_to_fixup_dir(trans, root, path, location.objectid);
BUG_ON(ret);
ret = btrfs_unlink_inode(trans, root, dir, inode, name, name_len); ret = btrfs_unlink_inode(trans, root, dir, inode, name, name_len);
BUG_ON(ret);
kfree(name); kfree(name);
iput(inode); iput(inode);