diff options
author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-10-17 21:37:39 -0700 |
---|---|---|
committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-10-26 15:38:24 -0700 |
commit | a12890aebb895951720ff884eab1c99a30645b29 (patch) | |
tree | 68399a7145cba73c7ae5b4e271beb455057b2757 | |
parent | ab9d5dc59fe6157b8035c4b605166b868f678ee4 (diff) | |
download | linux-a12890aebb895951720ff884eab1c99a30645b29.tar.bz2 |
xfs: scrub the AGI
Add a forgotten check to the AGI verifier, then wire up the scrub
infrastructure to check the AGI contents.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
-rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 3 | ||||
-rw-r--r-- | fs/xfs/scrub/agheader.c | 85 | ||||
-rw-r--r-- | fs/xfs/scrub/common.c | 5 | ||||
-rw-r--r-- | fs/xfs/scrub/scrub.c | 4 | ||||
-rw-r--r-- | fs/xfs/scrub/scrub.h | 1 |
5 files changed, 95 insertions, 3 deletions
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index aeb2a668337c..1e326dd8ad92 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -487,9 +487,10 @@ struct xfs_scrub_metadata { #define XFS_SCRUB_TYPE_SB 1 /* superblock */ #define XFS_SCRUB_TYPE_AGF 2 /* AG free header */ #define XFS_SCRUB_TYPE_AGFL 3 /* AG free list */ +#define XFS_SCRUB_TYPE_AGI 4 /* AG inode header */ /* Number of scrub subcommands. */ -#define XFS_SCRUB_TYPE_NR 4 +#define XFS_SCRUB_TYPE_NR 5 /* i: Repair this metadata. */ #define XFS_SCRUB_IFLAG_REPAIR (1 << 0) diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c index 1a30d2fea97f..5495aa50002c 100644 --- a/fs/xfs/scrub/agheader.c +++ b/fs/xfs/scrub/agheader.c @@ -31,6 +31,7 @@ #include "xfs_sb.h" #include "xfs_inode.h" #include "xfs_alloc.h" +#include "xfs_ialloc.h" #include "scrub/xfs_scrub.h" #include "scrub/scrub.h" #include "scrub/common.h" @@ -512,3 +513,87 @@ xfs_scrub_agfl( out: return error; } + +/* AGI */ + +/* Scrub the AGI. */ +int +xfs_scrub_agi( + struct xfs_scrub_context *sc) +{ + struct xfs_mount *mp = sc->mp; + struct xfs_agi *agi; + xfs_agnumber_t agno; + xfs_agblock_t agbno; + xfs_agblock_t eoag; + xfs_agino_t agino; + xfs_agino_t first_agino; + xfs_agino_t last_agino; + xfs_agino_t icount; + int i; + int level; + int error = 0; + + agno = sc->sa.agno = sc->sm->sm_agno; + error = xfs_scrub_ag_read_headers(sc, agno, &sc->sa.agi_bp, + &sc->sa.agf_bp, &sc->sa.agfl_bp); + if (!xfs_scrub_process_error(sc, agno, XFS_AGI_BLOCK(sc->mp), &error)) + goto out; + + agi = XFS_BUF_TO_AGI(sc->sa.agi_bp); + + /* Check the AG length */ + eoag = be32_to_cpu(agi->agi_length); + if (eoag != xfs_ag_block_count(mp, agno)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + /* Check btree roots and levels */ + agbno = be32_to_cpu(agi->agi_root); + if (!xfs_verify_agbno(mp, agno, agbno)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + level = be32_to_cpu(agi->agi_level); + if (level <= 0 || level > XFS_BTREE_MAXLEVELS) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + if (xfs_sb_version_hasfinobt(&mp->m_sb)) { + agbno = be32_to_cpu(agi->agi_free_root); + if (!xfs_verify_agbno(mp, agno, agbno)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + level = be32_to_cpu(agi->agi_free_level); + if (level <= 0 || level > XFS_BTREE_MAXLEVELS) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + } + + /* Check inode counters */ + xfs_ialloc_agino_range(mp, agno, &first_agino, &last_agino); + icount = be32_to_cpu(agi->agi_count); + if (icount > last_agino - first_agino + 1 || + icount < be32_to_cpu(agi->agi_freecount)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + /* Check inode pointers */ + agino = be32_to_cpu(agi->agi_newino); + if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + agino = be32_to_cpu(agi->agi_dirino); + if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + + /* Check unlinked inode buckets */ + for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) { + agino = be32_to_cpu(agi->agi_unlinked[i]); + if (agino == NULLAGINO) + continue; + if (!xfs_verify_agino(mp, agno, agino)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + } + + if (agi->agi_pad32 != cpu_to_be32(0)) + xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp); + +out: + return error; +} diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index f0bb9ddc465c..b0ba14cfac90 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -254,7 +254,8 @@ want_ag_read_header_failure( { /* Return all AG header read failures when scanning btrees. */ if (sc->sm->sm_type != XFS_SCRUB_TYPE_AGF && - sc->sm->sm_type != XFS_SCRUB_TYPE_AGFL) + sc->sm->sm_type != XFS_SCRUB_TYPE_AGFL && + sc->sm->sm_type != XFS_SCRUB_TYPE_AGI) return true; /* * If we're scanning a given type of AG header, we only want to @@ -285,7 +286,7 @@ xfs_scrub_ag_read_headers( int error; error = xfs_ialloc_read_agi(mp, sc->tp, agno, agi); - if (error) + if (error && want_ag_read_header_failure(sc, XFS_SCRUB_TYPE_AGI)) goto out; error = xfs_alloc_read_agf(mp, sc->tp, agno, 0, agf); diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c index 1179103803d2..72fa72a3f59c 100644 --- a/fs/xfs/scrub/scrub.c +++ b/fs/xfs/scrub/scrub.c @@ -170,6 +170,10 @@ static const struct xfs_scrub_meta_ops meta_scrub_ops[] = { .setup = xfs_scrub_setup_ag_header, .scrub = xfs_scrub_agfl, }, + { /* agi */ + .setup = xfs_scrub_setup_ag_header, + .scrub = xfs_scrub_agi, + }, }; /* This isn't a stable feature, warn once per day. */ diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h index 50f864130d77..09952c2f30ba 100644 --- a/fs/xfs/scrub/scrub.h +++ b/fs/xfs/scrub/scrub.h @@ -70,5 +70,6 @@ int xfs_scrub_tester(struct xfs_scrub_context *sc); int xfs_scrub_superblock(struct xfs_scrub_context *sc); int xfs_scrub_agf(struct xfs_scrub_context *sc); int xfs_scrub_agfl(struct xfs_scrub_context *sc); +int xfs_scrub_agi(struct xfs_scrub_context *sc); #endif /* __XFS_SCRUB_SCRUB_H__ */ |