[PATCH 5/5] xfs_scrub: hoist scrub retry loop to scrub_item_check_file

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

For metadata check calls, use the ioctl retry and freeze permission
tracking in scrub_item that we created in the last patch.  This enables
us to move the check retry loop out of xfs_scrub_metadata and into its
caller to remove a long backwards jump, and gets us closer to
vectorizing scrub calls.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 scrub/scrub.c |   19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)


diff --git a/scrub/scrub.c b/scrub/scrub.c
index d3d96a85903..6f9f182c629 100644
--- a/scrub/scrub.c
+++ b/scrub/scrub.c
@@ -88,7 +88,6 @@ xfs_check_metadata(
 	DEFINE_DESCR(dsc, ctx, format_scrub_descr);
 	struct xfs_scrub_metadata	meta = { };
 	enum xfrog_scrub_group		group;
-	unsigned int			tries = 0;
 	int				error;
 
 	background_sleep();
@@ -116,7 +115,7 @@ xfs_check_metadata(
 	descr_set(&dsc, &meta);
 
 	dbg_printf("check %s flags %xh\n", descr_render(&dsc), meta.sm_flags);
-retry:
+
 	error = -xfrog_scrub_metadata(xfdp, &meta);
 	if (debug_tweak_on("XFS_SCRUB_FORCE_REPAIR") && !error)
 		meta.sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
@@ -163,10 +162,8 @@ _("Filesystem is shut down, aborting."));
 	 * we'll try the scan again, just in case the fs was busy.
 	 * Only retry so many times.
 	 */
-	if (want_retry(&meta) && tries < 10) {
-		tries++;
-		goto retry;
-	}
+	if (want_retry(&meta) && scrub_item_schedule_retry(sri, scrub_type))
+		return 0;
 
 	/* Complain about incomplete or suspicious metadata. */
 	scrub_warn_incomplete_scrub(ctx, &dsc, &meta);
@@ -304,6 +301,7 @@ scrub_item_check_file(
 	int				override_fd)
 {
 	struct xfs_fd			xfd;
+	struct scrub_item		old_sri;
 	struct xfs_fd			*xfdp = &ctx->mnt;
 	unsigned int			scrub_type;
 	int				error;
@@ -323,7 +321,14 @@ scrub_item_check_file(
 		if (!(sri->sri_state[scrub_type] & SCRUB_ITEM_NEEDSCHECK))
 			continue;
 
-		error = xfs_check_metadata(ctx, xfdp, scrub_type, sri);
+		sri->sri_tries[scrub_type] = SCRUB_ITEM_MAX_RETRIES;
+		do {
+			memcpy(&old_sri, sri, sizeof(old_sri));
+			error = xfs_check_metadata(ctx, xfdp, scrub_type, sri);
+			if (error)
+				return error;
+		} while (scrub_item_call_kernel_again(sri, scrub_type,
+					SCRUB_ITEM_NEEDSCHECK, &old_sri));
 
 		/*
 		 * Progress is counted by the inode for inode metadata; for




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