From: Darrick J. Wong <djwong@xxxxxxxxxx>
Teach the summary count checker to count the number of free realtime
extents and compare that to the superblock copy.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/scrub/fscounters.c | 86 ++++++++++++++++++++++++++++++++++++++++++++-
fs/xfs/scrub/scrub.h | 8 ----
2 files changed, 84 insertions(+), 10 deletions(-)
diff --git a/fs/xfs/scrub/fscounters.c b/fs/xfs/scrub/fscounters.c
index c869b537fe34..2eea6a517b79 100644
--- a/fs/xfs/scrub/fscounters.c
+++ b/fs/xfs/scrub/fscounters.c
@@ -14,6 +14,8 @@
#include "xfs_health.h"
#include "xfs_btree.h"
#include "xfs_ag.h"
+#include "xfs_rtalloc.h"
+#include "xfs_inode.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
@@ -43,6 +45,16 @@
* our tolerance for mismatch between expected and actual counter values.
*/
+struct xchk_fscounters {
+ struct xfs_scrub *sc;
+ uint64_t icount;
+ uint64_t ifree;
+ uint64_t fdblocks;
+ uint64_t frextents;
+ unsigned long long icount_min;
+ unsigned long long icount_max;
+};
+
/*
* Since the expected value computation is lockless but only browses incore
* values, the percpu counters should be fairly close to each other. However,
@@ -127,6 +139,7 @@ xchk_setup_fscounters(
if (!sc->buf)
return -ENOMEM;
fsc = sc->buf;
+ fsc->sc = sc;
xfs_icount_range(sc->mp, &fsc->icount_min, &fsc->icount_max);
@@ -288,6 +301,59 @@ xchk_fscount_aggregate_agcounts(
return 0;
}
+#ifdef CONFIG_XFS_RT
+static inline int
+xchk_fscount_add_frextent(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ const struct xfs_rtalloc_rec *rec,
+ void *priv)
+{
+ struct xchk_fscounters *fsc = priv;
+ int error = 0;
+
+ fsc->frextents += rec->ar_extcount;
+
+ xchk_should_terminate(fsc->sc, &error);
+ return error;
+}
+
+/* Calculate the number of free realtime extents from the realtime bitmap. */
+STATIC int
+xchk_fscount_count_frextents(
+ struct xfs_scrub *sc,
+ struct xchk_fscounters *fsc)
+{
+ struct xfs_mount *mp = sc->mp;
+ int error;
+
+ fsc->frextents = 0;
+ if (!xfs_has_realtime(mp))
+ return 0;
+
+ xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
+ error = xfs_rtalloc_query_all(sc->mp, sc->tp,
+ xchk_fscount_add_frextent, fsc);
+ if (error) {
+ xchk_set_incomplete(sc);
+ goto out_unlock;
+ }
+
+out_unlock:
+ xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
+ return error;
+}
+#else
+STATIC int
+xchk_fscount_count_frextents(
+ struct xfs_scrub *sc,
+ struct xchk_fscounters *fsc)
+{
+ fsc->frextents = 0;
+ return 0;
+}
+#endif /* CONFIG_XFS_RT */
+
/*
* Part 2: Comparing filesystem summary counters. All we have to do here is
* sum the percpu counters and compare them to what we've observed.
@@ -359,16 +425,17 @@ xchk_fscounters(
{
struct xfs_mount *mp = sc->mp;
struct xchk_fscounters *fsc = sc->buf;
- int64_t icount, ifree, fdblocks;
+ int64_t icount, ifree, fdblocks, frextents;
int error;
/* Snapshot the percpu counters. */
icount = percpu_counter_sum(&mp->m_icount);
ifree = percpu_counter_sum(&mp->m_ifree);
fdblocks = percpu_counter_sum(&mp->m_fdblocks);
+ frextents = percpu_counter_sum(&mp->m_frextents);
/* No negative values, please! */
- if (icount < 0 || ifree < 0 || fdblocks < 0)
+ if (icount < 0 || ifree < 0 || fdblocks < 0 || frextents < 0)
xchk_set_corrupt(sc);
/* See if icount is obviously wrong. */
@@ -379,6 +446,10 @@ xchk_fscounters(
if (fdblocks > mp->m_sb.sb_dblocks)
xchk_set_corrupt(sc);
+ /* See if frextents is obviously wrong. */
+ if (frextents > mp->m_sb.sb_rextents)
+ xchk_set_corrupt(sc);
+
/*
* If ifree exceeds icount by more than the minimum variance then
* something's probably wrong with the counters.
@@ -393,6 +464,13 @@ xchk_fscounters(
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_INCOMPLETE)
return 0;
+ /* Count the free extents counter for rt volumes. */
+ error = xchk_fscount_count_frextents(sc, fsc);
+ if (!xchk_process_error(sc, 0, XFS_SB_BLOCK(mp), &error))
+ return error;
+ if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_INCOMPLETE)
+ return 0;
+
/* Compare the in-core counters with whatever we counted. */
if (!xchk_fscount_within_range(sc, icount, &mp->m_icount, fsc->icount))
xchk_set_corrupt(sc);
@@ -404,5 +482,9 @@ xchk_fscounters(
fsc->fdblocks))
xchk_set_corrupt(sc);
+ if (!xchk_fscount_within_range(sc, frextents, &mp->m_frextents,
+ fsc->frextents))
+ xchk_set_corrupt(sc);
+
return 0;
}
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h
index 92b383061e88..85c055c2ddc5 100644
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -173,12 +173,4 @@ void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
# define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
#endif
-struct xchk_fscounters {
- uint64_t icount;
- uint64_t ifree;
- uint64_t fdblocks;
- unsigned long long icount_min;
- unsigned long long icount_max;
-};
-
#endif /* __XFS_SCRUB_SCRUB_H__ */
