[PATCH 38/43] xfs_scrub: check rtgroup metadata directory connections

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Run the rtgroup metapath scrubber during phase 5 to ensure that any
rtgroup metadata files are still connected to the metadir tree after
we've pruned any bad links.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 scrub/phase5.c |   24 ++++++++++++++++++++++--
 scrub/scrub.h  |    4 +++-
 2 files changed, 25 insertions(+), 3 deletions(-)


diff --git a/scrub/phase5.c b/scrub/phase5.c
index 4d0a76a529b55d..22a22915dbc68d 100644
--- a/scrub/phase5.c
+++ b/scrub/phase5.c
@@ -750,6 +750,7 @@ static int
 queue_metapath_scan(
 	struct workqueue	*wq,
 	bool			*abortedp,
+	xfs_rgnumber_t		rgno,
 	uint64_t		type)
 {
 	struct fs_scan_item	*item;
@@ -762,7 +763,7 @@ queue_metapath_scan(
 		str_liberror(ctx, ret, _("setting up metapath scan"));
 		return ret;
 	}
-	scrub_item_init_metapath(&item->sri, type);
+	scrub_item_init_metapath(&item->sri, rgno, type);
 	scrub_item_schedule(&item->sri, XFS_SCRUB_TYPE_METAPATH);
 	item->abortedp = abortedp;
 
@@ -785,6 +786,7 @@ run_kernel_metadir_path_scrubbers(
 	const struct xfrog_scrub_descr	*sc;
 	uint64_t		type;
 	unsigned int		nr_threads = scrub_nproc_workqueue(ctx);
+	xfs_rgnumber_t		rgno;
 	bool			aborted = false;
 	int			ret, ret2;
 
@@ -804,7 +806,7 @@ run_kernel_metadir_path_scrubbers(
 		if (sc->group != XFROG_SCRUB_GROUP_FS)
 			continue;
 
-		ret = queue_metapath_scan(&wq, &aborted, type);
+		ret = queue_metapath_scan(&wq, &aborted, 0, type);
 		if (ret) {
 			str_liberror(ctx, ret,
  _("queueing metapath scrub work"));
@@ -812,6 +814,24 @@ run_kernel_metadir_path_scrubbers(
 		}
 	}
 
+	/* Scan all rtgroup metadata files */
+	for (rgno = 0;
+	     rgno < ctx->mnt.fsgeom.rgcount && !aborted;
+	     rgno++) {
+		for (type = 0; type < XFS_SCRUB_METAPATH_NR; type++) {
+			sc = &xfrog_metapaths[type];
+			if (sc->group != XFROG_SCRUB_GROUP_RTGROUP)
+				continue;
+
+			ret = queue_metapath_scan(&wq, &aborted, rgno, type);
+			if (ret) {
+				str_liberror(ctx, ret,
+  _("queueing metapath scrub work"));
+				goto wait;
+			}
+		}
+	}
+
 wait:
 	ret2 = -workqueue_terminate(&wq);
 	if (ret2) {
diff --git a/scrub/scrub.h b/scrub/scrub.h
index bb94a11dcfce71..24b5ad629c5158 100644
--- a/scrub/scrub.h
+++ b/scrub/scrub.h
@@ -118,9 +118,11 @@ scrub_item_init_file(struct scrub_item *sri, const struct xfs_bulkstat *bstat)
 }
 
 static inline void
-scrub_item_init_metapath(struct scrub_item *sri, uint64_t metapath)
+scrub_item_init_metapath(struct scrub_item *sri, xfs_rgnumber_t rgno,
+		uint64_t metapath)
 {
 	memset(sri, 0, sizeof(*sri));
+	sri->sri_agno = rgno;
 	sri->sri_ino = metapath;
 }