From e816ed267d47527af64d9d19d32c325dc9ba57ab Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Thu, 14 Jul 2022 11:06:06 -0700 Subject: xfs: allow userspace to rebuild metadata structures 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 --- 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(-) (limited to 'fs') 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 cda7b55d77a5..60975d050b82 100644 --- a/fs/xfs/scrub/scrub.c +++ b/fs/xfs/scrub/scrub.c @@ -412,6 +412,11 @@ 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 @@ -536,8 +541,12 @@ retry_op: !(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 79472579347f..e633276a3dd5 100644 --- a/fs/xfs/scrub/trace.h +++ b/fs/xfs/scrub/trace.h @@ -95,7 +95,8 @@ 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" }, \ -- cgit v1.2.3