[PATCH 5.10 CANDIDATE 3/7] xfs: Skip repetitive warnings about mount options

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From: Pavel Reichl <preichl@xxxxxxxxxx>

commit 92cf7d36384b99d5a57bf4422904a3c16dc4527a upstream.

Skip the warnings about mount option being deprecated if we are
remounting and deprecated option state is not changing.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=211605
Fix-suggested-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Signed-off-by: Pavel Reichl <preichl@xxxxxxxxxx>

Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
 fs/xfs/xfs_super.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index f667be85f454..b4a3a71bd667 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1155,6 +1155,22 @@ suffix_kstrtoint(
 	return ret;
 }
 
+static inline void
+xfs_fs_warn_deprecated(
+	struct fs_context	*fc,
+	struct fs_parameter	*param,
+	uint64_t		flag,
+	bool			value)
+{
+	/* Don't print the warning if reconfiguring and current mount point
+	 * already had the flag set
+	 */
+	if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
+			!!(XFS_M(fc->root->d_sb)->m_flags & flag) == value)
+		return;
+	xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
+}
+
 /*
  * Set mount state from a mount option.
  *
@@ -1294,19 +1310,19 @@ xfs_fc_parse_param(
 #endif
 	/* Following mount options will be removed in September 2025 */
 	case Opt_ikeep:
-		xfs_warn(parsing_mp, "%s mount option is deprecated.", param->key);
+		xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_IKEEP, true);
 		parsing_mp->m_flags |= XFS_MOUNT_IKEEP;
 		return 0;
 	case Opt_noikeep:
-		xfs_warn(parsing_mp, "%s mount option is deprecated.", param->key);
+		xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_IKEEP, false);
 		parsing_mp->m_flags &= ~XFS_MOUNT_IKEEP;
 		return 0;
 	case Opt_attr2:
-		xfs_warn(parsing_mp, "%s mount option is deprecated.", param->key);
+		xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_ATTR2, true);
 		parsing_mp->m_flags |= XFS_MOUNT_ATTR2;
 		return 0;
 	case Opt_noattr2:
-		xfs_warn(parsing_mp, "%s mount option is deprecated.", param->key);
+		xfs_fs_warn_deprecated(fc, param, XFS_MOUNT_NOATTR2, true);
 		parsing_mp->m_flags &= ~XFS_MOUNT_ATTR2;
 		parsing_mp->m_flags |= XFS_MOUNT_NOATTR2;
 		return 0;
-- 
2.25.1




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