[4/4] xfs_scrub: upload clean bills of health

Commit Message

Darrick J. Wong Dec. 31, 2023, 10:14 p.m. UTC

From: Darrick J. Wong <[e-mail]>

If scrub terminates with a clean bill of health, tell the kernel that
the result of the scan is that everything's healthy.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 scrub/phase1.c |   38 ++++++++++++++++++++++++++++++++++++++
 scrub/repair.c |   15 +++++++++++++++
 scrub/repair.h |    1 +
 scrub/scrub.c  |    9 +++++++++
 scrub/scrub.h  |    1 +
 5 files changed, 64 insertions(+)

Patch

diff --git a/scrub/phase1.c b/scrub/phase1.c
index 48ca8313b05..96138e03e71 100644
--- a/scrub/phase1.c
+++ b/scrub/phase1.c
@@ -44,6 +44,40 @@  xfs_shutdown_fs(
 		str_errno(ctx, ctx->mntpoint);
 }
 
+/*
+ * If we haven't found /any/ problems at all, tell the kernel that we're giving
+ * the filesystem a clean bill of health.
+ */
+static int
+report_to_kernel(
+	struct scrub_ctx	*ctx)
+{
+	struct action_list	alist;
+	int			ret;
+
+	if (!ctx->scrub_setup_succeeded || ctx->corruptions_found ||
+	    ctx->runtime_errors || ctx->unfixable_errors ||
+	    ctx->warnings_found)
+		return 0;
+
+	action_list_init(&alist);
+	ret = scrub_clean_health(ctx, &alist);
+	if (ret)
+		return ret;
+
+	/*
+	 * Complain if we cannot fail the clean bill of health, unless we're
+	 * just testing repairs.
+	 */
+	if (action_list_length(&alist) > 0 &&
+	    !debug_tweak_on("XFS_SCRUB_FORCE_REPAIR")) {
+		str_info(ctx, _("Couldn't upload clean bill of health."), NULL);
+		action_list_discard(&alist);
+	}
+
+	return 0;
+}
+
 /* Clean up the XFS-specific state data. */
 int
 scrub_cleanup(
@@ -51,6 +85,10 @@  scrub_cleanup(
 {
 	int			error;
 
+	error = report_to_kernel(ctx);
+	if (error)
+		return error;
+
 	action_lists_free(&ctx->action_lists);
 	if (ctx->fshandle)
 		free_handle(ctx->fshandle, ctx->fshandle_len);
diff --git a/scrub/repair.c b/scrub/repair.c
index 3cb7224f7cc..9ade805e1b6 100644
--- a/scrub/repair.c
+++ b/scrub/repair.c
@@ -172,6 +172,21 @@  action_lists_alloc(
 	return 0;
 }
 
+/* Discard repair list contents. */
+void
+action_list_discard(
+	struct action_list		*alist)
+{
+	struct action_item		*aitem;
+	struct action_item		*n;
+
+	list_for_each_entry_safe(aitem, n, &alist->list, list) {
+		alist->nr--;
+		list_del(&aitem->list);
+		free(aitem);
+	}
+}
+
 /* Free the repair lists. */
 void
 action_lists_free(
diff --git a/scrub/repair.h b/scrub/repair.h
index 486617f1ce4..aa3ea13615f 100644
--- a/scrub/repair.h
+++ b/scrub/repair.h
@@ -24,6 +24,7 @@  static inline bool action_list_empty(const struct action_list *alist)
 
 unsigned long long action_list_length(struct action_list *alist);
 void action_list_add(struct action_list *dest, struct action_item *item);
+void action_list_discard(struct action_list *alist);
 void action_list_splice(struct action_list *dest, struct action_list *src);
 
 void action_list_find_mustfix(struct action_list *actions,
diff --git a/scrub/scrub.c b/scrub/scrub.c
index cf056779526..7cb94af3d15 100644
--- a/scrub/scrub.c
+++ b/scrub/scrub.c
@@ -444,6 +444,15 @@  scrub_nlinks(
 	return scrub_meta_type(ctx, XFS_SCRUB_TYPE_NLINKS, 0, alist);
 }
 
+/* Update incore health records if we were clean. */
+int
+scrub_clean_health(
+	struct scrub_ctx		*ctx,
+	struct action_list		*alist)
+{
+	return scrub_meta_type(ctx, XFS_SCRUB_TYPE_HEALTHY, 0, alist);
+}
+
 /* How many items do we have to check? */
 unsigned int
 scrub_estimate_ag_work(
diff --git a/scrub/scrub.h b/scrub/scrub.h
index 5e3f40bf1f4..cb33ddb46f3 100644
--- a/scrub/scrub.h
+++ b/scrub/scrub.h
@@ -29,6 +29,7 @@  int scrub_summary_metadata(struct scrub_ctx *ctx, struct action_list *alist);
 int scrub_fs_counters(struct scrub_ctx *ctx, struct action_list *alist);
 int scrub_quotacheck(struct scrub_ctx *ctx, struct action_list *alist);
 int scrub_nlinks(struct scrub_ctx *ctx, struct action_list *alist);
+int scrub_clean_health(struct scrub_ctx *ctx, struct action_list *alist);
 
 bool can_scrub_fs_metadata(struct scrub_ctx *ctx);
 bool can_scrub_inode(struct scrub_ctx *ctx);