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xfs: make xfs_cross_rename() complete fully

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Now that xfs_finish_rename() exists, there is no reason for
xfs_cross_rename() to return to xfs_rename() to finish off the
rename transaction. Drive the completion code into
xfs_cross_rename() and handle all errors there so as to simplify
the xfs_rename() code.

Further, push the rename exchange target_ip check to early in the
rename code so as to make the error handling easy and obviously
correct.

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 14:08:07 +11:00 committed by Dave Chinner
parent 310606b0c7
commit eeacd3217b
1 changed files with 21 additions and 20 deletions
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41
fs/xfs/xfs_inode.c
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@ -2703,14 +2703,14 @@ xfs_cross_rename(
ip2->i_ino,
first_block, free_list, spaceres);
if (error)
goto out;
goto out_trans_abort;
/* Swap inode number for dirent in second parent */
error = xfs_dir_replace(tp, dp2, name2,
ip1->i_ino,
first_block, free_list, spaceres);
if (error)
goto out;
goto out_trans_abort;
/*
* If we're renaming one or more directories across different parents,
@ -2725,16 +2725,16 @@ xfs_cross_rename(
dp1->i_ino, first_block,
free_list, spaceres);
if (error)
goto out;
goto out_trans_abort;
/* transfer ip2 ".." reference to dp1 */
if (!S_ISDIR(ip1->i_d.di_mode)) {
error = xfs_droplink(tp, dp2);
if (error)
goto out;
goto out_trans_abort;
error = xfs_bumplink(tp, dp1);
if (error)
goto out;
goto out_trans_abort;
}
/*
@ -2752,16 +2752,16 @@ xfs_cross_rename(
dp2->i_ino, first_block,
free_list, spaceres);
if (error)
goto out;
goto out_trans_abort;
/* transfer ip1 ".." reference to dp2 */
if (!S_ISDIR(ip2->i_d.di_mode)) {
error = xfs_droplink(tp, dp1);
if (error)
goto out;
goto out_trans_abort;
error = xfs_bumplink(tp, dp2);
if (error)
goto out;
goto out_trans_abort;
}
/*
@ -2789,7 +2789,11 @@ xfs_cross_rename(
}
xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE);
out:
return xfs_finish_rename(tp, free_list);
out_trans_abort:
xfs_bmap_cancel(free_list);
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
return error;
}
@ -2820,6 +2824,9 @@ xfs_rename(
trace_xfs_rename(src_dp, target_dp, src_name, target_name);
if ((flags & RENAME_EXCHANGE) && !target_ip)
return -EINVAL;
new_parent = (src_dp != target_dp);
src_is_directory = S_ISDIR(src_ip->i_d.di_mode);
@ -2877,17 +2884,11 @@ xfs_rename(
xfs_bmap_init(&free_list, &first_block);
/*
* Handle RENAME_EXCHANGE flags
*/
if (flags & RENAME_EXCHANGE) {
error = xfs_cross_rename(tp, src_dp, src_name, src_ip,
target_dp, target_name, target_ip,
&free_list, &first_block, spaceres);
if (error)
goto out_trans_abort;
return xfs_finish_rename(tp, &free_list);
}
/* RENAME_EXCHANGE is unique from here on. */
if (flags & RENAME_EXCHANGE)
return xfs_cross_rename(tp, src_dp, src_name, src_ip,
target_dp, target_name, target_ip,
&free_list, &first_block, spaceres);
/*
* Set up the target.