From: Darrick J. Wong <djwong@xxxxxxxxxx>
Add a new (superuser-only) flag to the online metadata repair ioctl to
force it to rebuild structures, even if they're not broken. We will use
this to move metadata structures out of the way during a free space
defragmentation operation.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_fs.h | 6 +++++-
fs/xfs/scrub/scrub.c | 11 ++++++++++-
fs/xfs/scrub/trace.h | 3 ++-
3 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 1cfd5bc6520a..920fd4513fcb 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -741,7 +741,11 @@ struct xfs_scrub_metadata {
*/
#define XFS_SCRUB_OFLAG_NO_REPAIR_NEEDED (1u << 7)
-#define XFS_SCRUB_FLAGS_IN (XFS_SCRUB_IFLAG_REPAIR)
+/* i: Rebuild the data structure. */
+#define XFS_SCRUB_IFLAG_FORCE_REBUILD (1 << 31)
+
+#define XFS_SCRUB_FLAGS_IN (XFS_SCRUB_IFLAG_REPAIR | \
+ XFS_SCRUB_IFLAG_FORCE_REBUILD)
#define XFS_SCRUB_FLAGS_OUT (XFS_SCRUB_OFLAG_CORRUPT | \
XFS_SCRUB_OFLAG_PREEN | \
XFS_SCRUB_OFLAG_XFAIL | \
diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c
index 8960053b6ae5..a5b9bbbbdfaa 100644
--- a/fs/xfs/scrub/scrub.c
+++ b/fs/xfs/scrub/scrub.c
@@ -410,6 +410,11 @@ xchk_validate_inputs(
goto out;
}
+ /* No rebuild without repair. */
+ if ((sm->sm_flags & XFS_SCRUB_IFLAG_FORCE_REBUILD) &&
+ !(sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR))
+ return -EINVAL;
+
/*
* We only want to repair read-write v5+ filesystems. Defer the check
* for ops->repair until after our scrub confirms that we need to
@@ -534,8 +539,12 @@ xfs_scrub_metadata(
!(sc->flags & XREP_ALREADY_FIXED)) {
bool needs_fix = xchk_needs_repair(sc->sm);
+ /* Userspace asked us to rebuild the structure regardless. */
+ if (sc->sm->sm_flags & XFS_SCRUB_IFLAG_FORCE_REBUILD)
+ needs_fix = true;
+
/* Let debug users force us into the repair routines. */
- if (XFS_TEST_ERROR(false, mp, XFS_ERRTAG_FORCE_SCRUB_REPAIR))
+ if (XFS_TEST_ERROR(needs_fix, mp, XFS_ERRTAG_FORCE_SCRUB_REPAIR))
needs_fix = true;
/*
diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h
index f5498f628c17..6b47f1b5e07c 100644
--- a/fs/xfs/scrub/trace.h
+++ b/fs/xfs/scrub/trace.h
@@ -98,7 +98,8 @@ TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_FSCOUNTERS);
{ XFS_SCRUB_OFLAG_XCORRUPT, "xcorrupt" }, \
{ XFS_SCRUB_OFLAG_INCOMPLETE, "incomplete" }, \
{ XFS_SCRUB_OFLAG_WARNING, "warning" }, \
- { XFS_SCRUB_OFLAG_NO_REPAIR_NEEDED, "norepair" }
+ { XFS_SCRUB_OFLAG_NO_REPAIR_NEEDED, "norepair" }, \
+ { XFS_SCRUB_IFLAG_FORCE_REBUILD, "rebuild" }
#define XFS_SCRUB_STATE_STRINGS \
{ XCHK_TRY_HARDER, "try_harder" }, \
