diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-01 09:08:53 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-11 16:06:40 -0800 |
| commit | f8c1d7023e252df853efbb3566c6d47b148609fe (patch) | |
| tree | 83db817c7b120cc401db5d22dd947733b5b60ffa | |
| parent | 3258cb208caba74258ffdd8bd59972bbda9bfee1 (diff) | |
| download | linux-f8c1d7023e252df853efbb3566c6d47b148609fe.tar.bz2 | |
xfs: scrub should flag dir/attr offsets that aren't mappable with xfs_dablk_t
Teach scrub to flag extent maps that exceed the range that can be mapped
with a xfs_dablk_t.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
| -rw-r--r-- | fs/xfs/libxfs/xfs_types.c | 11 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_types.h | 1 | ||||
| -rw-r--r-- | fs/xfs/scrub/bmap.c | 27 |
3 files changed, 39 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c index 3306fc42cfad..451608b5a37b 100644 --- a/fs/xfs/libxfs/xfs_types.c +++ b/fs/xfs/libxfs/xfs_types.c @@ -204,3 +204,14 @@ xfs_verify_icount( xfs_icount_range(mp, &min, &max); return icount >= min && icount <= max; } + +/* Sanity-checking of dir/attr block offsets. */ +bool +xfs_verify_dablk( + struct xfs_mount *mp, + xfs_fileoff_t dabno) +{ + xfs_dablk_t max_dablk = -1U; + + return dabno <= max_dablk; +} diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 8f02855a019a..704b4f308780 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -188,5 +188,6 @@ bool xfs_internal_inum(struct xfs_mount *mp, xfs_ino_t ino); bool xfs_verify_dir_ino(struct xfs_mount *mp, xfs_ino_t ino); bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); bool xfs_verify_icount(struct xfs_mount *mp, unsigned long long icount); +bool xfs_verify_dablk(struct xfs_mount *mp, xfs_fileoff_t off); #endif /* __XFS_TYPES_H__ */ diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c index e1d11f3223e3..a703cd58a90e 100644 --- a/fs/xfs/scrub/bmap.c +++ b/fs/xfs/scrub/bmap.c @@ -281,6 +281,31 @@ xchk_bmap_extent_xref( xchk_ag_free(info->sc, &info->sc->sa); } +/* + * Directories and attr forks should never have blocks that can't be addressed + * by a xfs_dablk_t. + */ +STATIC void +xchk_bmap_dirattr_extent( + struct xfs_inode *ip, + struct xchk_bmap_info *info, + struct xfs_bmbt_irec *irec) +{ + struct xfs_mount *mp = ip->i_mount; + xfs_fileoff_t off; + + if (!S_ISDIR(VFS_I(ip)->i_mode) && info->whichfork != XFS_ATTR_FORK) + return; + + if (!xfs_verify_dablk(mp, irec->br_startoff)) + xchk_fblock_set_corrupt(info->sc, info->whichfork, + irec->br_startoff); + + off = irec->br_startoff + irec->br_blockcount - 1; + if (!xfs_verify_dablk(mp, off)) + xchk_fblock_set_corrupt(info->sc, info->whichfork, off); +} + /* Scrub a single extent record. */ STATIC int xchk_bmap_extent( @@ -305,6 +330,8 @@ xchk_bmap_extent( xchk_fblock_set_corrupt(info->sc, info->whichfork, irec->br_startoff); + xchk_bmap_dirattr_extent(ip, info, irec); + /* There should never be a "hole" extent in either extent list. */ if (irec->br_startblock == HOLESTARTBLOCK) xchk_fblock_set_corrupt(info->sc, info->whichfork, |