[PATCH 08/41] xfs_io: support scrubbing metadata directory paths

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

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Support invoking the metadata directory path scrubber from xfs_io for
testing.

Signed-off-by: "Darrick J. Wong" <djwong@xxxxxxxxxx>
---
 libfrog/scrub.c |   14 +++++++++++++-
 libfrog/scrub.h |    2 ++
 scrub/scrub.c   |   18 ++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)


diff --git a/libfrog/scrub.c b/libfrog/scrub.c
index e233c0f9c8e1e6..b2d58c7a966b0d 100644
--- a/libfrog/scrub.c
+++ b/libfrog/scrub.c
@@ -154,8 +154,20 @@ const struct xfrog_scrub_descr xfrog_scrubbers[XFS_SCRUB_TYPE_NR] = {
 		.descr	= "directory tree structure",
 		.group	= XFROG_SCRUB_GROUP_INODE,
 	},
+	[XFS_SCRUB_TYPE_METAPATH] = {
+		.name	= "metapath",
+		.descr	= "metadata directory paths",
+		.group	= XFROG_SCRUB_GROUP_METAPATH,
+	},
+};
+
+const struct xfrog_scrub_descr xfrog_metapaths[XFS_SCRUB_METAPATH_NR] = {
+	[XFS_SCRUB_METAPATH_PROBE] = {
+		.name	= "probe",
+		.descr	= "metapath",
+		.group	= XFROG_SCRUB_GROUP_NONE,
+	},
 };
-#undef DEP
 
 /* Invoke the scrub ioctl.  Returns zero or negative error code. */
 int
diff --git a/libfrog/scrub.h b/libfrog/scrub.h
index b564c0d7bd0f55..a35d3e9c293fe5 100644
--- a/libfrog/scrub.h
+++ b/libfrog/scrub.h
@@ -15,6 +15,7 @@ enum xfrog_scrub_group {
 	XFROG_SCRUB_GROUP_INODE,	/* per-inode metadata */
 	XFROG_SCRUB_GROUP_ISCAN,	/* metadata requiring full inode scan */
 	XFROG_SCRUB_GROUP_SUMMARY,	/* summary metadata */
+	XFROG_SCRUB_GROUP_METAPATH,	/* metadata directory path */
 };
 
 /* Catalog of scrub types and names, indexed by XFS_SCRUB_TYPE_* */
@@ -25,6 +26,7 @@ struct xfrog_scrub_descr {
 };
 
 extern const struct xfrog_scrub_descr xfrog_scrubbers[XFS_SCRUB_TYPE_NR];
+extern const struct xfrog_scrub_descr xfrog_metapaths[XFS_SCRUB_METAPATH_NR];
 
 int xfrog_scrub_metadata(struct xfs_fd *xfd, struct xfs_scrub_metadata *meta);
 
diff --git a/scrub/scrub.c b/scrub/scrub.c
index 44c4049899d29e..bcd63eea1030a6 100644
--- a/scrub/scrub.c
+++ b/scrub/scrub.c
@@ -53,6 +53,22 @@ static const unsigned int scrub_deps[XFS_SCRUB_TYPE_NR] = {
 };
 #undef DEP
 
+static int
+format_metapath_descr(
+	char				*buf,
+	size_t				buflen,
+	struct xfs_scrub_vec_head	*vhead)
+{
+	const struct xfrog_scrub_descr	*sc;
+
+	if (vhead->svh_ino >= XFS_SCRUB_METAPATH_NR)
+		return snprintf(buf, buflen, _("unknown metadir path %llu"),
+				(unsigned long long)vhead->svh_ino);
+
+	sc = &xfrog_metapaths[vhead->svh_ino];
+	return snprintf(buf, buflen, "%s", _(sc->descr));
+}
+
 /* Describe the current state of a vectored scrub. */
 int
 format_scrubv_descr(
@@ -89,6 +105,8 @@ format_scrubv_descr(
 	case XFROG_SCRUB_GROUP_ISCAN:
 	case XFROG_SCRUB_GROUP_NONE:
 		return snprintf(buf, buflen, _("%s"), _(sc->descr));
+	case XFROG_SCRUB_GROUP_METAPATH:
+		return format_metapath_descr(buf, buflen, vhead);
 	}
 	return -1;
 }