diff options
Diffstat (limited to 'fs/xfs/xfs_ialloc_btree.c')
| -rw-r--r-- | fs/xfs/xfs_ialloc_btree.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 2b8b7a3..11306c6 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -33,6 +33,7 @@ #include "xfs_ialloc.h" #include "xfs_alloc.h" #include "xfs_error.h" +#include "xfs_trace.h" STATIC int @@ -181,6 +182,44 @@ xfs_inobt_key_diff( cur->bc_rec.i.ir_startino; } +void +xfs_inobt_read_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); + unsigned int level; + int sblock_ok; /* block passes checks */ + + /* magic number and level verification */ + level = be16_to_cpu(block->bb_level); + sblock_ok = block->bb_magic == cpu_to_be32(XFS_IBT_MAGIC) && + level < mp->m_in_maxlevels; + + /* numrecs verification */ + sblock_ok = sblock_ok && + be16_to_cpu(block->bb_numrecs) <= mp->m_inobt_mxr[level != 0]; + + /* sibling pointer verification */ + sblock_ok = sblock_ok && + (block->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_leftsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_leftsib && + (block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_rightsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_rightsib; + + if (!sblock_ok) { + trace_xfs_btree_corrupt(bp, _RET_IP_); + XFS_CORRUPTION_ERROR("xfs_inobt_read_verify", + XFS_ERRLEVEL_LOW, mp, block); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } + + bp->b_iodone = NULL; + xfs_buf_ioend(bp, 0); +} + #ifdef DEBUG STATIC int xfs_inobt_keys_inorder( @@ -218,6 +257,7 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .init_rec_from_cur = xfs_inobt_init_rec_from_cur, .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, .key_diff = xfs_inobt_key_diff, + .read_verify = xfs_inobt_read_verify, #ifdef DEBUG .keys_inorder = xfs_inobt_keys_inorder, .recs_inorder = xfs_inobt_recs_inorder, |
