From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
In most places in XFS, we have a specific order in which we gather
resources: grab the inode, allocate a transaction, then lock the inode.
xfs_bui_item_recover doesn't do it in that order, so fix it to be more
consistent. This also makes the error bailout code a bit less weird.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
v3.2: don't remove the iunlock/irele if the defer commit succeeds
---
fs/xfs/xfs_bmap_item.c | 41 +++++++++++++++++++++++------------------
1 file changed, 23 insertions(+), 18 deletions(-)
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index c1f2cc3c42cb..852411568d14 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -475,25 +475,26 @@ xfs_bui_item_recover(
(bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS))
return -EFSCORRUPTED;
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
- XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
- if (error)
- return error;
-
- budp = xfs_trans_get_bud(tp, buip);
-
/* Grab the inode. */
- error = xfs_iget(mp, tp, bmap->me_owner, 0, XFS_ILOCK_EXCL, &ip);
+ error = xfs_iget(mp, NULL, bmap->me_owner, 0, 0, &ip);
if (error)
- goto err_inode;
+ return error;
- error = xfs_qm_dqattach_locked(ip, false);
+ error = xfs_qm_dqattach(ip);
if (error)
- goto err_inode;
+ goto err_rele;
if (VFS_I(ip)->i_nlink == 0)
xfs_iflags_set(ip, XFS_IRECOVERY);
+ /* Allocate transaction and do the work. */
+ error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
+ XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
+ if (error)
+ goto err_rele;
+
+ budp = xfs_trans_get_bud(tp, buip);
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
count = bmap->me_len;
@@ -501,7 +502,7 @@ xfs_bui_item_recover(
whichfork, bmap->me_startoff, bmap->me_startblock,
&count, state);
if (error)
- goto err_inode;
+ goto err_cancel;
if (count > 0) {
ASSERT(bui_type == XFS_BMAP_UNMAP);
@@ -512,17 +513,21 @@ xfs_bui_item_recover(
xfs_bmap_unmap_extent(tp, ip, &irec);
}
+ /* Commit transaction, which frees the transaction. */
error = xfs_defer_ops_capture_and_commit(tp, capture_list);
+ if (error)
+ goto err_unlock;
+
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_irele(ip);
- return error;
+ return 0;
-err_inode:
+err_cancel:
xfs_trans_cancel(tp);
- if (ip) {
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- xfs_irele(ip);
- }
+err_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+err_rele:
+ xfs_irele(ip);
return error;
}
