diff mbox series

[5.4,16/26] xfs: preserve default grace interval during quotacheck

Message ID 20221026062843.927600-17-chandan.babu@oracle.com (mailing list archive)
State New, archived
Headers show
Series xfs stable candidate patches for 5.4.y (from v5.7) | expand

Commit Message

Chandan Babu R Oct. 26, 2022, 6:28 a.m. UTC 
From: "Darrick J. Wong" <darrick.wong@oracle.com>

commit 5885539f0af371024d07afd14974bfdc3fff84c5 upstream.

When quotacheck runs, it zeroes all the timer fields in every dquot.
Unfortunately, it also does this to the root dquot, which erases any
preconfigured grace intervals and warning limits that the administrator
may have set.  Worse yet, the incore copies of those variables remain
set.  This cache coherence problem manifests itself as the grace
interval mysteriously being reset back to the defaults at the /next/
mount.

Fix it by not resetting the root disk dquot's timer and warning fields.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
---
 fs/xfs/xfs_qm.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 035930a4f0dd..fe93e044d81b 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -875,12 +875,20 @@  xfs_qm_reset_dqcounts(
 		ddq->d_bcount = 0;
 		ddq->d_icount = 0;
 		ddq->d_rtbcount = 0;
-		ddq->d_btimer = 0;
-		ddq->d_itimer = 0;
-		ddq->d_rtbtimer = 0;
-		ddq->d_bwarns = 0;
-		ddq->d_iwarns = 0;
-		ddq->d_rtbwarns = 0;
+
+		/*
+		 * dquot id 0 stores the default grace period and the maximum
+		 * warning limit that were set by the administrator, so we
+		 * should not reset them.
+		 */
+		if (ddq->d_id != 0) {
+			ddq->d_btimer = 0;
+			ddq->d_itimer = 0;
+			ddq->d_rtbtimer = 0;
+			ddq->d_bwarns = 0;
+			ddq->d_iwarns = 0;
+			ddq->d_rtbwarns = 0;
+		}
 
 		if (xfs_sb_version_hascrc(&mp->m_sb)) {
 			xfs_update_cksum((char *)&dqb[j],