[XFS] kill usesless IHOLD calls in xfs_remove and xfs_rmdir
The VFS always has an inode reference when we call these functions. So we
only need to grab a signle reference to each inode that's joined to a
transaction - all the other bumping and dropping is as useless as the
comments describing the IRIX semantics.
SGI-PV: 976035
SGI-Modid: xfs-linux-melb:xfs-kern:30912a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 2ebfc60..70702a6 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -2162,20 +2162,6 @@
return error;
}
- /*
- * We need to get a reference to ip before we get our log
- * reservation. The reason for this is that we cannot call
- * xfs_iget for an inode for which we do not have a reference
- * once we've acquired a log reservation. This is because the
- * inode we are trying to get might be in xfs_inactive going
- * for a log reservation. Since we'll have to wait for the
- * inactive code to complete before returning from xfs_iget,
- * we need to make sure that we don't have log space reserved
- * when we call xfs_iget. Instead we get an unlocked reference
- * to the inode before getting our log reservation.
- */
- IHOLD(ip);
-
xfs_itrace_entry(ip);
xfs_itrace_ref(ip);
@@ -2184,7 +2170,6 @@
error = XFS_QM_DQATTACH(mp, ip, 0);
if (error) {
REMOVE_DEBUG_TRACE(__LINE__);
- IRELE(ip);
goto std_return;
}
@@ -2211,7 +2196,6 @@
ASSERT(error != ENOSPC);
REMOVE_DEBUG_TRACE(__LINE__);
xfs_trans_cancel(tp, 0);
- IRELE(ip);
return error;
}
@@ -2219,7 +2203,6 @@
if (error) {
REMOVE_DEBUG_TRACE(__LINE__);
xfs_trans_cancel(tp, cancel_flags);
- IRELE(ip);
goto std_return;
}
@@ -2227,6 +2210,7 @@
* At this point, we've gotten both the directory and the entry
* inodes locked.
*/
+ IHOLD(ip);
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
IHOLD(dp);
@@ -2260,12 +2244,6 @@
link_zero = (ip)->i_d.di_nlink==0;
/*
- * Take an extra ref on the inode so that it doesn't
- * go to xfs_inactive() from within the commit.
- */
- IHOLD(ip);
-
- /*
* If this is a synchronous mount, make sure that the
* remove transaction goes to disk before returning to
* the user.
@@ -2281,10 +2259,8 @@
}
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
- if (error) {
- IRELE(ip);
+ if (error)
goto std_return;
- }
/*
* If we are using filestreams, kill the stream association.
@@ -2296,7 +2272,6 @@
xfs_filestream_deassociate(ip);
xfs_itrace_exit(ip);
- IRELE(ip);
/* Fall through to std_return with error = 0 */
std_return:
@@ -2325,8 +2300,6 @@
cancel_flags |= XFS_TRANS_ABORT;
xfs_trans_cancel(tp, cancel_flags);
- IRELE(ip);
-
goto std_return;
}
@@ -2698,7 +2671,6 @@
struct xfs_name *name,
xfs_inode_t *cdp)
{
- bhv_vnode_t *dir_vp = XFS_ITOV(dp);
xfs_mount_t *mp = dp->i_mount;
xfs_trans_t *tp;
int error;
@@ -2724,27 +2696,12 @@
}
/*
- * We need to get a reference to cdp before we get our log
- * reservation. The reason for this is that we cannot call
- * xfs_iget for an inode for which we do not have a reference
- * once we've acquired a log reservation. This is because the
- * inode we are trying to get might be in xfs_inactive going
- * for a log reservation. Since we'll have to wait for the
- * inactive code to complete before returning from xfs_iget,
- * we need to make sure that we don't have log space reserved
- * when we call xfs_iget. Instead we get an unlocked reference
- * to the inode before getting our log reservation.
- */
- IHOLD(cdp);
-
- /*
* Get the dquots for the inodes.
*/
error = XFS_QM_DQATTACH(mp, dp, 0);
if (!error)
error = XFS_QM_DQATTACH(mp, cdp, 0);
if (error) {
- IRELE(cdp);
REMOVE_DEBUG_TRACE(__LINE__);
goto std_return;
}
@@ -2771,7 +2728,6 @@
if (error) {
ASSERT(error != ENOSPC);
cancel_flags = 0;
- IRELE(cdp);
goto error_return;
}
XFS_BMAP_INIT(&free_list, &first_block);
@@ -2785,14 +2741,13 @@
error = xfs_lock_dir_and_entry(dp, cdp);
if (error) {
xfs_trans_cancel(tp, cancel_flags);
- IRELE(cdp);
goto std_return;
}
+ IHOLD(dp);
xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
- VN_HOLD(dir_vp);
- xfs_itrace_ref(cdp);
+ IHOLD(cdp);
xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);
ASSERT(cdp->i_d.di_nlink >= 2);
@@ -2846,12 +2801,6 @@
last_cdp_link = (cdp)->i_d.di_nlink==0;
/*
- * Take an extra ref on the child vnode so that it
- * does not go to xfs_inactive() from within the commit.
- */
- IHOLD(cdp);
-
- /*
* If this is a synchronous mount, make sure that the
* rmdir transaction goes to disk before returning to
* the user.
@@ -2865,19 +2814,15 @@
xfs_bmap_cancel(&free_list);
xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
XFS_TRANS_ABORT));
- IRELE(cdp);
goto std_return;
}
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
if (error) {
- IRELE(cdp);
goto std_return;
}
- IRELE(cdp);
-
/* Fall through to std_return with error = 0 or the errno
* from xfs_trans_commit. */
std_return:
