diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 3d29f4a5242f0b486ed6faedab613901cb2bc181..05e7ed1b80225c6b6ffa8c5e07ff68b9a255de88 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -154,9 +154,10 @@ xfs_validate_sb_write( * Carry out additional sb summary counter sanity checks when we write * the superblock. We skip this in the read validator because there * could be newer superblocks in the log and if the values are garbage - * we'll recalculate them at the end of log mount. + * even after replay we'll recalculate them at the end of log mount. */ if (sbp->sb_fdblocks > sbp->sb_dblocks || + !xfs_verify_icount(mp, sbp->sb_icount) || sbp->sb_ifree > sbp->sb_icount) { xfs_warn(mp, "SB summary counter sanity check failed"); return -EFSCORRUPTED; diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c index 2e2a243cef2ec1052343dc328fb8c648e7033241..33a5ca346bafc8f9bbfb02ba197484d994aff593 100644 --- a/fs/xfs/libxfs/xfs_types.c +++ b/fs/xfs/libxfs/xfs_types.c @@ -171,3 +171,37 @@ xfs_verify_rtbno( { return rtbno < mp->m_sb.sb_rblocks; } + +/* Calculate the range of valid icount values. */ +static void +xfs_icount_range( + struct xfs_mount *mp, + unsigned long long *min, + unsigned long long *max) +{ + unsigned long long nr_inos = 0; + xfs_agnumber_t agno; + + /* root, rtbitmap, rtsum all live in the first chunk */ + *min = XFS_INODES_PER_CHUNK; + + for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { + xfs_agino_t first, last; + + xfs_agino_range(mp, agno, &first, &last); + nr_inos += last - first + 1; + } + *max = nr_inos; +} + +/* Sanity-checking of inode counts. */ +bool +xfs_verify_icount( + struct xfs_mount *mp, + unsigned long long icount) +{ + unsigned long long min, max; + + xfs_icount_range(mp, &min, &max); + return icount >= min && icount <= max; +} diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 4055d62f690c380235169732c66de76842578fc0..b9e6c89284c392063ee6dc50ddd47a542b50275e 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -165,5 +165,6 @@ bool xfs_verify_ino(struct xfs_mount *mp, xfs_ino_t ino); 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); #endif /* __XFS_TYPES_H__ */