xfs: more sensible inode refcounting for ialloc
Currently we return iodes from xfs_ialloc with just a single reference held.
But we need two references, as one is dropped during transaction commit and
the second needs to be transfered to the VFS. Change xfs_ialloc to use
xfs_iget plus xfs_trans_ijoin_ref to grab two references to the inode,
and remove the now superflous IHOLD calls from all callers. This also
greatly simplifies the error handling in xfs_create and also allow to remove
xfs_trans_iget as no other callers are left.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index d8e6f8c..258d4f9 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -1310,7 +1310,7 @@
error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid,
XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
if (error)
- goto std_return;
+ return error;
if (is_dir) {
rdev = 0;
@@ -1390,12 +1390,6 @@
}
/*
- * At this point, we've gotten a newly allocated inode.
- * It is locked (and joined to the transaction).
- */
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-
- /*
* Now we join the directory inode to the transaction. We do not do it
* earlier because xfs_dir_ialloc might commit the previous transaction
* (and release all the locks). An error from here on will result in
@@ -1440,22 +1434,13 @@
*/
xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp);
- /*
- * xfs_trans_commit normally decrements the vnode ref count
- * when it unlocks the inode. Since we want to return the
- * vnode to the caller, we bump the vnode ref count now.
- */
- IHOLD(ip);
-
error = xfs_bmap_finish(&tp, &free_list, &committed);
if (error)
- goto out_abort_rele;
+ goto out_bmap_cancel;
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
- if (error) {
- IRELE(ip);
- goto out_dqrele;
- }
+ if (error)
+ goto out_release_inode;
xfs_qm_dqrele(udqp);
xfs_qm_dqrele(gdqp);
@@ -1469,27 +1454,21 @@
cancel_flags |= XFS_TRANS_ABORT;
out_trans_cancel:
xfs_trans_cancel(tp, cancel_flags);
- out_dqrele:
- xfs_qm_dqrele(udqp);
- xfs_qm_dqrele(gdqp);
-
- if (unlock_dp_on_error)
- xfs_iunlock(dp, XFS_ILOCK_EXCL);
- std_return:
- return error;
-
- out_abort_rele:
+ out_release_inode:
/*
* Wait until after the current transaction is aborted to
* release the inode. This prevents recursive transactions
* and deadlocks from xfs_inactive.
*/
- xfs_bmap_cancel(&free_list);
- cancel_flags |= XFS_TRANS_ABORT;
- xfs_trans_cancel(tp, cancel_flags);
- IRELE(ip);
- unlock_dp_on_error = B_FALSE;
- goto out_dqrele;
+ if (ip)
+ IRELE(ip);
+
+ xfs_qm_dqrele(udqp);
+ xfs_qm_dqrele(gdqp);
+
+ if (unlock_dp_on_error)
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ return error;
}
#ifdef DEBUG
@@ -2114,9 +2093,8 @@
XFS_BMAPI_WRITE | XFS_BMAPI_METADATA,
&first_block, resblks, mval, &nmaps,
&free_list);
- if (error) {
- goto error1;
- }
+ if (error)
+ goto error2;
if (resblks)
resblks -= fs_blocks;
@@ -2148,7 +2126,7 @@
error = xfs_dir_createname(tp, dp, link_name, ip->i_ino,
&first_block, &free_list, resblks);
if (error)
- goto error1;
+ goto error2;
xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
@@ -2161,13 +2139,6 @@
xfs_trans_set_sync(tp);
}
- /*
- * xfs_trans_commit normally decrements the vnode ref count
- * when it unlocks the inode. Since we want to return the
- * vnode to the caller, we bump the vnode ref count now.
- */
- IHOLD(ip);
-
error = xfs_bmap_finish(&tp, &free_list, &committed);
if (error) {
goto error2;