mirror of https://gitee.com/openkylin/linux.git
[XFS] refactor btree validation helpers
Move the various btree validation helpers around in xfs_btree.c so that they are close to each other and in common #ifdef DEBUG sections. Also add a new xfs_btree_check_ptr helper to check a btree ptr that can be either long or short form. Split out from a bigger patch from Dave Chinner with various small changes applied by me. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32183a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Bill O'Donnell <billodo@sgi.com> Signed-off-by: David Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig
Lachlan McIlroy
parent
b524bfeee2
commit
a23f6ef8ce
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@ -80,24 +80,6 @@ xfs_btree_maxrecs(
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*/
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#ifdef DEBUG
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/*
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* Debug routine: check that block header is ok.
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*/
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void
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xfs_btree_check_block(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_block_t *block, /* generic btree block pointer */
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int level, /* level of the btree block */
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xfs_buf_t *bp) /* buffer containing block, if any */
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{
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if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
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xfs_btree_check_lblock(cur, (xfs_btree_lblock_t *)block, level,
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bp);
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else
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xfs_btree_check_sblock(cur, (xfs_btree_sblock_t *)block, level,
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bp);
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}
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/*
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* Debug routine: check that keys are in the right order.
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*/
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@ -150,65 +132,7 @@ xfs_btree_check_key(
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ASSERT(0);
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}
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}
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#endif /* DEBUG */
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/*
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* Checking routine: check that long form block header is ok.
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*/
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/* ARGSUSED */
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lblock(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_lblock_t *block, /* btree long form block pointer */
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int level, /* level of the btree block */
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xfs_buf_t *bp) /* buffer for block, if any */
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{
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int lblock_ok; /* block passes checks */
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xfs_mount_t *mp; /* file system mount point */
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mp = cur->bc_mp;
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lblock_ok =
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be32_to_cpu(block->bb_magic) == xfs_magics[cur->bc_btnum] &&
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be16_to_cpu(block->bb_level) == level &&
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be16_to_cpu(block->bb_numrecs) <=
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xfs_btree_maxrecs(cur, (xfs_btree_block_t *)block) &&
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block->bb_leftsib &&
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(be64_to_cpu(block->bb_leftsib) == NULLDFSBNO ||
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XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_leftsib))) &&
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block->bb_rightsib &&
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(be64_to_cpu(block->bb_rightsib) == NULLDFSBNO ||
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XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_rightsib)));
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if (unlikely(XFS_TEST_ERROR(!lblock_ok, mp, XFS_ERRTAG_BTREE_CHECK_LBLOCK,
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XFS_RANDOM_BTREE_CHECK_LBLOCK))) {
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if (bp)
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xfs_buftrace("LBTREE ERROR", bp);
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XFS_ERROR_REPORT("xfs_btree_check_lblock", XFS_ERRLEVEL_LOW,
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mp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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return 0;
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}
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/*
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* Checking routine: check that (long) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lptr(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_dfsbno_t ptr, /* btree block disk address */
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int level) /* btree block level */
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{
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xfs_mount_t *mp; /* file system mount point */
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mp = cur->bc_mp;
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XFS_WANT_CORRUPTED_RETURN(
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level > 0 &&
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ptr != NULLDFSBNO &&
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XFS_FSB_SANITY_CHECK(mp, ptr));
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return 0;
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}
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#ifdef DEBUG
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/*
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* Debug routine: check that records are in the right order.
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*/
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@ -268,19 +192,49 @@ xfs_btree_check_rec(
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}
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#endif /* DEBUG */
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/*
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* Checking routine: check that block header is ok.
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*/
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/* ARGSUSED */
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lblock(
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_lblock *block, /* btree long form block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp) /* buffer for block, if any */
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{
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int lblock_ok; /* block passes checks */
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struct xfs_mount *mp; /* file system mount point */
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mp = cur->bc_mp;
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lblock_ok =
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be32_to_cpu(block->bb_magic) == xfs_magics[cur->bc_btnum] &&
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be16_to_cpu(block->bb_level) == level &&
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be16_to_cpu(block->bb_numrecs) <=
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xfs_btree_maxrecs(cur, (xfs_btree_block_t *)block) &&
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block->bb_leftsib &&
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(be64_to_cpu(block->bb_leftsib) == NULLDFSBNO ||
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XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_leftsib))) &&
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block->bb_rightsib &&
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(be64_to_cpu(block->bb_rightsib) == NULLDFSBNO ||
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XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_rightsib)));
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if (unlikely(XFS_TEST_ERROR(!lblock_ok, mp,
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XFS_ERRTAG_BTREE_CHECK_LBLOCK,
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XFS_RANDOM_BTREE_CHECK_LBLOCK))) {
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if (bp)
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xfs_buftrace("LBTREE ERROR", bp);
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XFS_ERROR_REPORT("xfs_btree_check_lblock", XFS_ERRLEVEL_LOW,
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mp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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return 0;
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}
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sblock(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_sblock_t *block, /* btree short form block pointer */
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_sblock *block, /* btree short form block pointer */
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int level, /* level of the btree block */
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xfs_buf_t *bp) /* buffer containing block */
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struct xfs_buf *bp) /* buffer containing block */
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{
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xfs_buf_t *agbp; /* buffer for ag. freespace struct */
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xfs_agf_t *agf; /* ag. freespace structure */
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struct xfs_buf *agbp; /* buffer for ag. freespace struct */
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struct xfs_agf *agf; /* ag. freespace structure */
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xfs_agblock_t agflen; /* native ag. freespace length */
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int sblock_ok; /* block passes checks */
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@ -311,26 +265,78 @@ xfs_btree_check_sblock(
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}
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/*
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* Checking routine: check that (short) pointer is ok.
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* Debug routine: check that block header is ok.
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*/
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int
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xfs_btree_check_block(
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_block *block, /* generic btree block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp) /* buffer containing block, if any */
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{
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if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
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return xfs_btree_check_lblock(cur,
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(struct xfs_btree_lblock *)block, level, bp);
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} else {
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return xfs_btree_check_sblock(cur,
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(struct xfs_btree_sblock *)block, level, bp);
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}
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}
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/*
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* Check that (long) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lptr(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_dfsbno_t bno, /* btree block disk address */
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int level) /* btree block level */
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{
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XFS_WANT_CORRUPTED_RETURN(
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level > 0 &&
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bno != NULLDFSBNO &&
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XFS_FSB_SANITY_CHECK(cur->bc_mp, bno));
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return 0;
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}
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/*
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* Check that (short) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sptr(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_agblock_t ptr, /* btree block disk address */
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int level) /* btree block level */
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agblock_t bno, /* btree block disk address */
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int level) /* btree block level */
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{
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xfs_buf_t *agbp; /* buffer for ag. freespace struct */
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xfs_agf_t *agf; /* ag. freespace structure */
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xfs_agblock_t agblocks = cur->bc_mp->m_sb.sb_agblocks;
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agbp = cur->bc_private.a.agbp;
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agf = XFS_BUF_TO_AGF(agbp);
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XFS_WANT_CORRUPTED_RETURN(
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level > 0 &&
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ptr != NULLAGBLOCK && ptr != 0 &&
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ptr < be32_to_cpu(agf->agf_length));
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bno != NULLAGBLOCK &&
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bno != 0 &&
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bno < agblocks);
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return 0;
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}
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/*
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* Check that block ptr is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_ptr(
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struct xfs_btree_cur *cur, /* btree cursor */
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union xfs_btree_ptr *ptr, /* btree block disk address */
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int index, /* offset from ptr to check */
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int level) /* btree block level */
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{
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if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
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return xfs_btree_check_lptr(cur,
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be64_to_cpu((&ptr->l)[index]), level);
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} else {
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return xfs_btree_check_sptr(cur,
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be32_to_cpu((&ptr->s)[index]), level);
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}
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}
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/*
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* Delete the btree cursor.
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*/
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@ -215,17 +215,70 @@ typedef struct xfs_btree_cur
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#ifdef __KERNEL__
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#ifdef DEBUG
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/*
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* Debug routine: check that block header is ok.
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* Check that long form block header is ok.
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*/
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void
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xfs_btree_check_block(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_block_t *block, /* generic btree block pointer */
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lblock(
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_lblock *block, /* btree long form block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp); /* buffer containing block, if any */
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/*
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* Check that short form block header is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sblock(
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_sblock *block, /* btree short form block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp); /* buffer containing block */
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/*
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* Check that block header is ok.
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*/
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int
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xfs_btree_check_block(
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struct xfs_btree_cur *cur, /* btree cursor */
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struct xfs_btree_block *block, /* generic btree block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp); /* buffer containing block, if any */
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/*
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* Check that (long) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lptr(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_dfsbno_t ptr, /* btree block disk address */
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int level); /* btree block level */
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#define xfs_btree_check_lptr_disk(cur, ptr, level) \
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xfs_btree_check_lptr(cur, be64_to_cpu(ptr), level)
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/*
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* Check that (short) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sptr(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agblock_t ptr, /* btree block disk address */
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int level); /* btree block level */
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/*
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* Check that (short) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_ptr(
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struct xfs_btree_cur *cur, /* btree cursor */
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union xfs_btree_ptr *ptr, /* btree block disk address */
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int index, /* offset from ptr to check */
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int level); /* btree block level */
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#ifdef DEBUG
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/*
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* Debug routine: check that keys are in the right order.
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*/
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@ -244,52 +297,10 @@ xfs_btree_check_rec(
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void *ar1, /* pointer to left (lower) record */
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void *ar2); /* pointer to right (higher) record */
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#else
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#define xfs_btree_check_block(a,b,c,d)
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#define xfs_btree_check_key(a,b,c)
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#define xfs_btree_check_rec(a,b,c)
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#define xfs_btree_check_key(a, b, c)
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#define xfs_btree_check_rec(a, b, c)
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#endif /* DEBUG */
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/*
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* Checking routine: check that long form block header is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lblock(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_lblock_t *block, /* btree long form block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp); /* buffer containing block, if any */
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/*
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* Checking routine: check that (long) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_lptr(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_dfsbno_t ptr, /* btree block disk address */
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int level); /* btree block level */
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#define xfs_btree_check_lptr_disk(cur, ptr, level) \
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xfs_btree_check_lptr(cur, be64_to_cpu(ptr), level)
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/*
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* Checking routine: check that short form block header is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sblock(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_btree_sblock_t *block, /* btree short form block pointer */
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int level, /* level of the btree block */
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struct xfs_buf *bp); /* buffer containing block */
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/*
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* Checking routine: check that (short) pointer is ok.
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*/
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int /* error (0 or EFSCORRUPTED) */
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xfs_btree_check_sptr(
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xfs_btree_cur_t *cur, /* btree cursor */
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xfs_agblock_t ptr, /* btree block disk address */
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int level); /* btree block level */
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/*
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* Delete the btree cursor.
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*/
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