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xfs: cleanup xfs_rename error handling

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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>
This commit is contained in:
Dave Chinner 2015-03-25 14:05:43 +11:00 committed by Dave Chinner
parent 95afcf5c7b
commit 445883e813
1 changed files with 26 additions and 33 deletions
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59
fs/xfs/xfs_inode.c
View File

@ -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;
}