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authorDave Chinner <dchinner@redhat.com>2015-03-25 14:05:43 +1100
committerDave Chinner <david@fromorbit.com>2015-03-25 14:05:43 +1100
commit445883e8133975fe8d555610c70c1c4c501f0bf8 (patch)
tree6f1ecf9746c65f6c31a0060812d8cf6f1df90c74
parent95afcf5c7bca93fb84d260f70c304f35ef4c3114 (diff)
xfs: cleanup xfs_rename error handling
The jump labels are ambiguous and unclear and some of the error paths are used inconsistently. Rules for error jumps are: - use out_trans_cancel for unmodified transaction context - use out_bmap_cancel on ENOSPC errors - use out_trans_abort when transaction is likely to be dirty. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
-rw-r--r--fs/xfs/xfs_inode.c59
1 files changed, 26 insertions, 33 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index d0a98bafcbac..426dbf7d094a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2788,7 +2788,7 @@ xfs_rename(
int error;
xfs_bmap_free_t free_list;
xfs_fsblock_t first_block;
- int cancel_flags;
+ int cancel_flags = 0;
int committed;
xfs_inode_t *inodes[__XFS_SORT_INODES];
int num_inodes = __XFS_SORT_INODES;
@@ -2802,28 +2802,23 @@ xfs_rename(
xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, NULL,
inodes, &num_inodes);
- xfs_bmap_init(&free_list, &first_block);
tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
- cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_rename, spaceres, 0);
if (error == -ENOSPC) {
spaceres = 0;
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_rename, 0, 0);
}
- if (error) {
- xfs_trans_cancel(tp, 0);
- goto std_return;
- }
+ if (error)
+ goto out_trans_cancel;
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
/*
* Attach the dquots to the inodes
*/
error = xfs_qm_vop_rename_dqattach(inodes);
- if (error) {
- xfs_trans_cancel(tp, cancel_flags);
- goto std_return;
- }
+ if (error)
+ goto out_trans_cancel;
/*
* Lock all the participating inodes. Depending upon whether
@@ -2853,9 +2848,11 @@ xfs_rename(
if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
(xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) {
error = -EXDEV;
- goto error_return;
+ goto out_trans_cancel;
}
+ xfs_bmap_init(&free_list, &first_block);
+
/*
* Handle RENAME_EXCHANGE flags
*/
@@ -2864,7 +2861,7 @@ xfs_rename(
target_dp, target_name, target_ip,
&free_list, &first_block, spaceres);
if (error)
- goto abort_return;
+ goto out_trans_abort;
goto finish_rename;
}
@@ -2879,7 +2876,7 @@ xfs_rename(
if (!spaceres) {
error = xfs_dir_canenter(tp, target_dp, target_name);
if (error)
- goto error_return;
+ goto out_trans_cancel;
}
/*
* If target does not exist and the rename crosses
@@ -2890,9 +2887,9 @@ xfs_rename(
src_ip->i_ino, &first_block,
&free_list, spaceres);
if (error == -ENOSPC)
- goto error_return;
+ goto out_bmap_cancel;
if (error)
- goto abort_return;
+ goto out_trans_abort;
xfs_trans_ichgtime(tp, target_dp,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
@@ -2900,7 +2897,7 @@ xfs_rename(
if (new_parent && src_is_directory) {
error = xfs_bumplink(tp, target_dp);
if (error)
- goto abort_return;
+ goto out_trans_abort;
}
} else { /* target_ip != NULL */
/*
@@ -2915,7 +2912,7 @@ xfs_rename(
if (!(xfs_dir_isempty(target_ip)) ||
(target_ip->i_d.di_nlink > 2)) {
error = -EEXIST;
- goto error_return;
+ goto out_trans_cancel;
}
}
@@ -2932,7 +2929,7 @@ xfs_rename(
src_ip->i_ino,
&first_block, &free_list, spaceres);
if (error)
- goto abort_return;
+ goto out_trans_abort;
xfs_trans_ichgtime(tp, target_dp,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
@@ -2943,7 +2940,7 @@ xfs_rename(
*/
error = xfs_droplink(tp, target_ip);
if (error)
- goto abort_return;
+ goto out_trans_abort;
if (src_is_directory) {
/*
@@ -2951,7 +2948,7 @@ xfs_rename(
*/
error = xfs_droplink(tp, target_ip);
if (error)
- goto abort_return;
+ goto out_trans_abort;
}
} /* target_ip != NULL */
@@ -2968,7 +2965,7 @@ xfs_rename(
&first_block, &free_list, spaceres);
ASSERT(error != -EEXIST);
if (error)
- goto abort_return;
+ goto out_trans_abort;
}
/*
@@ -2994,13 +2991,13 @@ xfs_rename(
*/
error = xfs_droplink(tp, src_dp);
if (error)
- goto abort_return;
+ goto out_trans_abort;
}
error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
&first_block, &free_list, spaceres);
if (error)
- goto abort_return;
+ goto out_trans_abort;
xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
@@ -3018,12 +3015,8 @@ finish_rename:
}
error = xfs_bmap_finish(&tp, &free_list, &committed);
- if (error) {
- xfs_bmap_cancel(&free_list);
- xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
- XFS_TRANS_ABORT));
- goto std_return;
- }
+ if (error)
+ goto out_trans_abort;
/*
* trans_commit will unlock src_ip, target_ip & decrement
@@ -3031,12 +3024,12 @@ finish_rename:
*/
return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
- abort_return:
+out_trans_abort:
cancel_flags |= XFS_TRANS_ABORT;
- error_return:
+out_bmap_cancel:
xfs_bmap_cancel(&free_list);
+out_trans_cancel:
xfs_trans_cancel(tp, cancel_flags);
- std_return:
return error;
}