[PATCH RESEND v2 04/18] xfs: Hold inode locks in xfs_trans_alloc_dir

From: Allison Henderson <allison.henderson@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH RESEND v2 04/18] xfs: Hold inode locks in xfs_trans_alloc_dir
Date: Thu,  4 Aug 2022 12:39:59 -0700	[thread overview]
Message-ID: <20220804194013.99237-5-allison.henderson@oracle.com> (raw)
In-Reply-To: <20220804194013.99237-1-allison.henderson@oracle.com>

Modify xfs_trans_alloc_dir to hold locks after return.  Caller will be
responsible for manual unlock.  We will need this later to hold locks
across parent pointer operations

Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
---
 fs/xfs/xfs_inode.c | 14 ++++++++++++--
 fs/xfs/xfs_trans.c |  6 ++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index cce5fe7c048e..2703473b13b1 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1278,10 +1278,15 @@ xfs_link(
 	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
 		xfs_trans_set_sync(tp);
 
-	return xfs_trans_commit(tp);
+	error = xfs_trans_commit(tp);
+	xfs_iunlock(tdp, XFS_ILOCK_EXCL);
+	xfs_iunlock(sip, XFS_ILOCK_EXCL);
+	return error;
 
  error_return:
 	xfs_trans_cancel(tp);
+	xfs_iunlock(tdp, XFS_ILOCK_EXCL);
+	xfs_iunlock(sip, XFS_ILOCK_EXCL);
  std_return:
 	if (error == -ENOSPC && nospace_error)
 		error = nospace_error;
@@ -2517,15 +2522,20 @@ xfs_remove(
 
 	error = xfs_trans_commit(tp);
 	if (error)
-		goto std_return;
+		goto out_unlock;
 
 	if (is_dir && xfs_inode_is_filestream(ip))
 		xfs_filestream_deassociate(ip);
 
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(dp, XFS_ILOCK_EXCL);
 	return 0;
 
  out_trans_cancel:
 	xfs_trans_cancel(tp);
+ out_unlock:
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	xfs_iunlock(dp, XFS_ILOCK_EXCL);
  std_return:
 	return error;
 }
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 7bd16fbff534..ac98ff416e54 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -1356,6 +1356,8 @@ xfs_trans_alloc_ichange(
  * The caller must ensure that the on-disk dquots attached to this inode have
  * already been allocated and initialized.  The ILOCKs will be dropped when the
  * transaction is committed or cancelled.
+ *
+ * Caller is responsible for unlocking the inodes manually upon return
  */
 int
 xfs_trans_alloc_dir(
@@ -1386,8 +1388,8 @@ xfs_trans_alloc_dir(
 
 	xfs_lock_two_inodes(dp, XFS_ILOCK_EXCL, ip, XFS_ILOCK_EXCL);
 
-	xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
-	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+	xfs_trans_ijoin(tp, dp, 0);
+	xfs_trans_ijoin(tp, ip, 0);
 
 	error = xfs_qm_dqattach_locked(dp, false);
 	if (error) {
-- 
2.25.1

