xfs: warn about LARP once per mount

Since LARP is an experimental debug-only feature, we should try to warn
about it being in use once per mount, not once per reboot.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_log.c

@@ -3910,8 +3910,8 @@ xfs_attr_use_log_assist(
 	if (error)
 		goto drop_incompat;
 
-	xfs_warn_once(mp,
-"EXPERIMENTAL logged extended attributes feature added. Use at your own risk!");
+	xfs_warn_mount(mp, XFS_OPSTATE_WARNED_LARP,
+ "EXPERIMENTAL logged extended attributes feature in use. Use at your own risk!");
 
 	return 0;
 drop_incompat:

fs/xfs/xfs_mount.h

@@ -395,6 +395,8 @@ __XFS_HAS_FEAT(nouuid, NOUUID)
 #define XFS_OPSTATE_WARNED_SCRUB	7
 /* Kernel has logged a warning about shrink being used on this fs. */
 #define XFS_OPSTATE_WARNED_SHRINK	8
+/* Kernel has logged a warning about logged xattr updates being used. */
+#define XFS_OPSTATE_WARNED_LARP		9
 
 #define __XFS_IS_OPSTATE(name, NAME) \
 static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
@@ -433,7 +435,8 @@ xfs_should_warn(struct xfs_mount *mp, long nr)
 	{ (1UL << XFS_OPSTATE_INODEGC_ENABLED),		"inodegc" }, \
 	{ (1UL << XFS_OPSTATE_BLOCKGC_ENABLED),		"blockgc" }, \
 	{ (1UL << XFS_OPSTATE_WARNED_SCRUB),		"wscrub" }, \
-	{ (1UL << XFS_OPSTATE_WARNED_SHRINK),		"wshrink" }
+	{ (1UL << XFS_OPSTATE_WARNED_SHRINK),		"wshrink" }, \
+	{ (1UL << XFS_OPSTATE_WARNED_LARP),		"wlarp" }
 
 /*
  * Max and min values for mount-option defined I/O