From a6a781a58befcbd467ce843af4eaca3906aa1f08 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 8 Jan 2018 10:51:03 -0800 Subject: xfs: have buffer verifier functions report failing address Modify each function that checks the contents of a metadata buffer to return the instruction address of the failing test so that we can report more precise failure errors to the log. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/libxfs/xfs_alloc.c | 43 ++++++++++++++++++++++--------------------- 1 file changed, 22 insertions(+), 21 deletions(-) (limited to 'fs/xfs/libxfs/xfs_alloc.c') diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 055ffa8b7a52..4d7ef74f5783 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -520,7 +520,7 @@ xfs_alloc_fixup_trees( return 0; } -static bool +static xfs_failaddr_t xfs_agfl_verify( struct xfs_buf *bp) { @@ -529,9 +529,9 @@ xfs_agfl_verify( int i; if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid)) - return false; + return __this_address; if (be32_to_cpu(agfl->agfl_magicnum) != XFS_AGFL_MAGIC) - return false; + return __this_address; /* * during growfs operations, the perag is not fully initialised, * so we can't use it for any useful checking. growfs ensures we can't @@ -539,16 +539,17 @@ xfs_agfl_verify( * so we can detect and avoid this problem. */ if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno) - return false; + return __this_address; for (i = 0; i < XFS_AGFL_SIZE(mp); i++) { if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK && be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks) - return false; + return __this_address; } - return xfs_log_check_lsn(mp, - be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn)); + if (!xfs_log_check_lsn(mp, be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn))) + return __this_address; + return NULL; } static void @@ -568,7 +569,7 @@ xfs_agfl_read_verify( if (!xfs_buf_verify_cksum(bp, XFS_AGFL_CRC_OFF)) xfs_verifier_error(bp, -EFSBADCRC); - else if (!xfs_agfl_verify(bp)) + else if (xfs_agfl_verify(bp)) xfs_verifier_error(bp, -EFSCORRUPTED); } @@ -583,7 +584,7 @@ xfs_agfl_write_verify( if (!xfs_sb_version_hascrc(&mp->m_sb)) return; - if (!xfs_agfl_verify(bp)) { + if (xfs_agfl_verify(bp)) { xfs_verifier_error(bp, -EFSCORRUPTED); return; } @@ -2393,7 +2394,7 @@ xfs_alloc_put_freelist( return 0; } -static bool +static xfs_failaddr_t xfs_agf_verify( struct xfs_mount *mp, struct xfs_buf *bp) @@ -2402,10 +2403,10 @@ xfs_agf_verify( if (xfs_sb_version_hascrc(&mp->m_sb)) { if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid)) - return false; + return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(XFS_BUF_TO_AGF(bp)->agf_lsn))) - return false; + return __this_address; } if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) && @@ -2414,18 +2415,18 @@ xfs_agf_verify( be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) && be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) && be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp))) - return false; + return __this_address; if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS || be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > XFS_BTREE_MAXLEVELS) - return false; + return __this_address; if (xfs_sb_version_hasrmapbt(&mp->m_sb) && (be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > XFS_BTREE_MAXLEVELS)) - return false; + return __this_address; /* * during growfs operations, the perag is not fully initialised, @@ -2434,18 +2435,18 @@ xfs_agf_verify( * so we can detect and avoid this problem. */ if (bp->b_pag && be32_to_cpu(agf->agf_seqno) != bp->b_pag->pag_agno) - return false; + return __this_address; if (xfs_sb_version_haslazysbcount(&mp->m_sb) && be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length)) - return false; + return __this_address; if (xfs_sb_version_hasreflink(&mp->m_sb) && (be32_to_cpu(agf->agf_refcount_level) < 1 || be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS)) - return false; + return __this_address; - return true;; + return NULL; } @@ -2458,7 +2459,7 @@ xfs_agf_read_verify( if (xfs_sb_version_hascrc(&mp->m_sb) && !xfs_buf_verify_cksum(bp, XFS_AGF_CRC_OFF)) xfs_verifier_error(bp, -EFSBADCRC); - else if (XFS_TEST_ERROR(!xfs_agf_verify(mp, bp), mp, + else if (XFS_TEST_ERROR(xfs_agf_verify(mp, bp), mp, XFS_ERRTAG_ALLOC_READ_AGF)) xfs_verifier_error(bp, -EFSCORRUPTED); } @@ -2470,7 +2471,7 @@ xfs_agf_write_verify( struct xfs_mount *mp = bp->b_target->bt_mount; struct xfs_buf_log_item *bip = bp->b_fspriv; - if (!xfs_agf_verify(mp, bp)) { + if (xfs_agf_verify(mp, bp)) { xfs_verifier_error(bp, -EFSCORRUPTED); return; } -- cgit v1.2.1