diff options
Diffstat (limited to 'fs/xfs/xfs_ialloc.c')
| -rw-r--r-- | fs/xfs/xfs_ialloc.c | 57 |
1 files changed, 43 insertions, 14 deletions
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index ba626613bf4..6d0a4954aa8 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -36,6 +36,8 @@ #include "xfs_rtalloc.h" #include "xfs_error.h" #include "xfs_bmap.h" +#include "xfs_cksum.h" +#include "xfs_buf_item.h" /* @@ -1453,6 +1455,7 @@ xfs_ialloc_log_agi( /* * Log the allocation group inode header buffer. */ + xfs_trans_buf_set_type(tp, bp, XFS_BLF_AGI_BUF); xfs_trans_log_buf(tp, bp, first, last); } @@ -1470,19 +1473,23 @@ xfs_check_agi_unlinked( #define xfs_check_agi_unlinked(agi) #endif -static void +static bool xfs_agi_verify( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_target->bt_mount; struct xfs_agi *agi = XFS_BUF_TO_AGI(bp); - int agi_ok; + if (xfs_sb_version_hascrc(&mp->m_sb) && + !uuid_equal(&agi->agi_uuid, &mp->m_sb.sb_uuid)) + return false; /* * Validate the magic number of the agi block. */ - agi_ok = agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC) && - XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); + if (agi->agi_magicnum != cpu_to_be32(XFS_AGI_MAGIC)) + return false; + if (!XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum))) + return false; /* * during growfs operations, the perag is not fully initialised, @@ -1490,30 +1497,52 @@ xfs_agi_verify( * use it by using uncached buffers that don't have the perag attached * so we can detect and avoid this problem. */ - if (bp->b_pag) - agi_ok = agi_ok && be32_to_cpu(agi->agi_seqno) == - bp->b_pag->pag_agno; + if (bp->b_pag && be32_to_cpu(agi->agi_seqno) != bp->b_pag->pag_agno) + return false; - if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, - XFS_RANDOM_IALLOC_READ_AGI))) { - XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agi); - xfs_buf_ioerror(bp, EFSCORRUPTED); - } xfs_check_agi_unlinked(agi); + return true; } static void xfs_agi_read_verify( struct xfs_buf *bp) { - xfs_agi_verify(bp); + struct xfs_mount *mp = bp->b_target->bt_mount; + int agi_ok = 1; + + if (xfs_sb_version_hascrc(&mp->m_sb)) + agi_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length), + offsetof(struct xfs_agi, agi_crc)); + agi_ok = agi_ok && xfs_agi_verify(bp); + + if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, + XFS_RANDOM_IALLOC_READ_AGI))) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } } static void xfs_agi_write_verify( struct xfs_buf *bp) { - xfs_agi_verify(bp); + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_buf_log_item *bip = bp->b_fspriv; + + if (!xfs_agi_verify(bp)) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + return; + } + + if (!xfs_sb_version_hascrc(&mp->m_sb)) + return; + + if (bip) + XFS_BUF_TO_AGI(bp)->agi_lsn = cpu_to_be64(bip->bli_item.li_lsn); + xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), + offsetof(struct xfs_agi, agi_crc)); } const struct xfs_buf_ops xfs_agi_buf_ops = { |