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032d91f982
Now that we've shortened everything, fix up all the indentation and whitespace problems. There are no functional changes. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
515 lines
14 KiB
C
515 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_btree.h"
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#include "xfs_bit.h"
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#include "xfs_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_inode.h"
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#include "xfs_alloc.h"
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#include "xfs_ialloc.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_icache.h"
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#include "xfs_rmap.h"
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#include "xfs_log.h"
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#include "xfs_trans_priv.h"
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#include "scrub/xfs_scrub.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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/*
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* Set us up to scrub inode btrees.
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* If we detect a discrepancy between the inobt and the inode,
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* try again after forcing logged inode cores out to disk.
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*/
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int
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xchk_setup_ag_iallocbt(
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struct xfs_scrub *sc,
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struct xfs_inode *ip)
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{
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return xchk_setup_ag_btree(sc, ip, sc->try_harder);
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}
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/* Inode btree scrubber. */
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/*
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* If we're checking the finobt, cross-reference with the inobt.
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* Otherwise we're checking the inobt; if there is an finobt, make sure
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* we have a record or not depending on freecount.
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*/
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static inline void
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xchk_iallocbt_chunk_xref_other(
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struct xfs_scrub *sc,
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struct xfs_inobt_rec_incore *irec,
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xfs_agino_t agino)
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{
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struct xfs_btree_cur **pcur;
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bool has_irec;
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int error;
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if (sc->sm->sm_type == XFS_SCRUB_TYPE_FINOBT)
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pcur = &sc->sa.ino_cur;
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else
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pcur = &sc->sa.fino_cur;
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if (!(*pcur))
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return;
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error = xfs_ialloc_has_inode_record(*pcur, agino, agino, &has_irec);
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if (!xchk_should_check_xref(sc, &error, pcur))
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return;
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if (((irec->ir_freecount > 0 && !has_irec) ||
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(irec->ir_freecount == 0 && has_irec)))
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xchk_btree_xref_set_corrupt(sc, *pcur, 0);
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}
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/* Cross-reference with the other btrees. */
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STATIC void
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xchk_iallocbt_chunk_xref(
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struct xfs_scrub *sc,
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struct xfs_inobt_rec_incore *irec,
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xfs_agino_t agino,
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xfs_agblock_t agbno,
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xfs_extlen_t len)
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{
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struct xfs_owner_info oinfo;
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if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
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return;
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xchk_xref_is_used_space(sc, agbno, len);
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xchk_iallocbt_chunk_xref_other(sc, irec, agino);
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
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xchk_xref_is_owned_by(sc, agbno, len, &oinfo);
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xchk_xref_is_not_shared(sc, agbno, len);
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}
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/* Is this chunk worth checking? */
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STATIC bool
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xchk_iallocbt_chunk(
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struct xchk_btree *bs,
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struct xfs_inobt_rec_incore *irec,
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xfs_agino_t agino,
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xfs_extlen_t len)
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{
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struct xfs_mount *mp = bs->cur->bc_mp;
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xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
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xfs_agblock_t bno;
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bno = XFS_AGINO_TO_AGBNO(mp, agino);
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if (bno + len <= bno ||
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!xfs_verify_agbno(mp, agno, bno) ||
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!xfs_verify_agbno(mp, agno, bno + len - 1))
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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xchk_iallocbt_chunk_xref(bs->sc, irec, agino, bno, len);
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return true;
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}
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/* Count the number of free inodes. */
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static unsigned int
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xchk_iallocbt_freecount(
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xfs_inofree_t freemask)
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{
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BUILD_BUG_ON(sizeof(freemask) != sizeof(__u64));
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return hweight64(freemask);
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}
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/* Check a particular inode with ir_free. */
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STATIC int
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xchk_iallocbt_check_cluster_freemask(
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struct xchk_btree *bs,
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xfs_ino_t fsino,
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xfs_agino_t chunkino,
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xfs_agino_t clusterino,
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struct xfs_inobt_rec_incore *irec,
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struct xfs_buf *bp)
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{
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struct xfs_dinode *dip;
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struct xfs_mount *mp = bs->cur->bc_mp;
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bool inode_is_free = false;
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bool freemask_ok;
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bool inuse;
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int error = 0;
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if (xchk_should_terminate(bs->sc, &error))
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return error;
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dip = xfs_buf_offset(bp, clusterino * mp->m_sb.sb_inodesize);
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if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
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(dip->di_version >= 3 &&
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be64_to_cpu(dip->di_ino) != fsino + clusterino)) {
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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goto out;
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}
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if (irec->ir_free & XFS_INOBT_MASK(chunkino + clusterino))
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inode_is_free = true;
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error = xfs_icache_inode_is_allocated(mp, bs->cur->bc_tp,
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fsino + clusterino, &inuse);
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if (error == -ENODATA) {
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/* Not cached, just read the disk buffer */
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freemask_ok = inode_is_free ^ !!(dip->di_mode);
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if (!bs->sc->try_harder && !freemask_ok)
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return -EDEADLOCK;
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} else if (error < 0) {
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/*
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* Inode is only half assembled, or there was an IO error,
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* or the verifier failed, so don't bother trying to check.
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* The inode scrubber can deal with this.
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*/
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goto out;
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} else {
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/* Inode is all there. */
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freemask_ok = inode_is_free ^ inuse;
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}
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if (!freemask_ok)
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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out:
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return 0;
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}
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/* Make sure the free mask is consistent with what the inodes think. */
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STATIC int
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xchk_iallocbt_check_freemask(
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struct xchk_btree *bs,
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struct xfs_inobt_rec_incore *irec)
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{
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struct xfs_owner_info oinfo;
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struct xfs_imap imap;
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struct xfs_mount *mp = bs->cur->bc_mp;
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struct xfs_dinode *dip;
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struct xfs_buf *bp;
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xfs_ino_t fsino;
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xfs_agino_t nr_inodes;
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xfs_agino_t agino;
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xfs_agino_t chunkino;
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xfs_agino_t clusterino;
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xfs_agblock_t agbno;
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int blks_per_cluster;
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uint16_t holemask;
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uint16_t ir_holemask;
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int error = 0;
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/* Make sure the freemask matches the inode records. */
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blks_per_cluster = xfs_icluster_size_fsb(mp);
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nr_inodes = XFS_OFFBNO_TO_AGINO(mp, blks_per_cluster, 0);
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
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for (agino = irec->ir_startino;
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agino < irec->ir_startino + XFS_INODES_PER_CHUNK;
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agino += blks_per_cluster * mp->m_sb.sb_inopblock) {
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fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
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chunkino = agino - irec->ir_startino;
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agbno = XFS_AGINO_TO_AGBNO(mp, agino);
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/* Compute the holemask mask for this cluster. */
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for (clusterino = 0, holemask = 0; clusterino < nr_inodes;
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clusterino += XFS_INODES_PER_HOLEMASK_BIT)
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holemask |= XFS_INOBT_MASK((chunkino + clusterino) /
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XFS_INODES_PER_HOLEMASK_BIT);
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/* The whole cluster must be a hole or not a hole. */
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ir_holemask = (irec->ir_holemask & holemask);
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if (ir_holemask != holemask && ir_holemask != 0) {
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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continue;
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}
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/* If any part of this is a hole, skip it. */
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if (ir_holemask) {
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xchk_xref_is_not_owned_by(bs->sc, agbno,
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blks_per_cluster, &oinfo);
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continue;
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}
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xchk_xref_is_owned_by(bs->sc, agbno, blks_per_cluster,
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&oinfo);
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/* Grab the inode cluster buffer. */
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imap.im_blkno = XFS_AGB_TO_DADDR(mp, bs->cur->bc_private.a.agno,
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agbno);
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imap.im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
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imap.im_boffset = 0;
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error = xfs_imap_to_bp(mp, bs->cur->bc_tp, &imap,
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&dip, &bp, 0, 0);
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if (!xchk_btree_xref_process_error(bs->sc, bs->cur, 0,
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&error))
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continue;
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/* Which inodes are free? */
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for (clusterino = 0; clusterino < nr_inodes; clusterino++) {
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error = xchk_iallocbt_check_cluster_freemask(bs,
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fsino, chunkino, clusterino, irec, bp);
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if (error) {
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xfs_trans_brelse(bs->cur->bc_tp, bp);
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return error;
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}
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}
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xfs_trans_brelse(bs->cur->bc_tp, bp);
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}
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return error;
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}
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/* Scrub an inobt/finobt record. */
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STATIC int
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xchk_iallocbt_rec(
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struct xchk_btree *bs,
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union xfs_btree_rec *rec)
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{
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struct xfs_mount *mp = bs->cur->bc_mp;
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xfs_filblks_t *inode_blocks = bs->private;
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struct xfs_inobt_rec_incore irec;
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uint64_t holes;
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xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
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xfs_agino_t agino;
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xfs_agblock_t agbno;
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xfs_extlen_t len;
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int holecount;
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int i;
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int error = 0;
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unsigned int real_freecount;
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uint16_t holemask;
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xfs_inobt_btrec_to_irec(mp, rec, &irec);
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if (irec.ir_count > XFS_INODES_PER_CHUNK ||
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irec.ir_freecount > XFS_INODES_PER_CHUNK)
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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real_freecount = irec.ir_freecount +
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(XFS_INODES_PER_CHUNK - irec.ir_count);
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if (real_freecount != xchk_iallocbt_freecount(irec.ir_free))
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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agino = irec.ir_startino;
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/* Record has to be properly aligned within the AG. */
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if (!xfs_verify_agino(mp, agno, agino) ||
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!xfs_verify_agino(mp, agno, agino + XFS_INODES_PER_CHUNK - 1)) {
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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goto out;
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}
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/* Make sure this record is aligned to cluster and inoalignmnt size. */
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agbno = XFS_AGINO_TO_AGBNO(mp, irec.ir_startino);
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if ((agbno & (xfs_ialloc_cluster_alignment(mp) - 1)) ||
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(agbno & (xfs_icluster_size_fsb(mp) - 1)))
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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*inode_blocks += XFS_B_TO_FSB(mp,
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irec.ir_count * mp->m_sb.sb_inodesize);
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/* Handle non-sparse inodes */
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if (!xfs_inobt_issparse(irec.ir_holemask)) {
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len = XFS_B_TO_FSB(mp,
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XFS_INODES_PER_CHUNK * mp->m_sb.sb_inodesize);
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if (irec.ir_count != XFS_INODES_PER_CHUNK)
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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if (!xchk_iallocbt_chunk(bs, &irec, agino, len))
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goto out;
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goto check_freemask;
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}
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/* Check each chunk of a sparse inode cluster. */
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holemask = irec.ir_holemask;
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holecount = 0;
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len = XFS_B_TO_FSB(mp,
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XFS_INODES_PER_HOLEMASK_BIT * mp->m_sb.sb_inodesize);
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holes = ~xfs_inobt_irec_to_allocmask(&irec);
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if ((holes & irec.ir_free) != holes ||
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irec.ir_freecount > irec.ir_count)
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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for (i = 0; i < XFS_INOBT_HOLEMASK_BITS; i++) {
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if (holemask & 1)
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holecount += XFS_INODES_PER_HOLEMASK_BIT;
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else if (!xchk_iallocbt_chunk(bs, &irec, agino, len))
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break;
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holemask >>= 1;
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agino += XFS_INODES_PER_HOLEMASK_BIT;
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}
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if (holecount > XFS_INODES_PER_CHUNK ||
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holecount + irec.ir_count != XFS_INODES_PER_CHUNK)
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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check_freemask:
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error = xchk_iallocbt_check_freemask(bs, &irec);
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if (error)
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goto out;
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out:
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return error;
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}
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/*
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* Make sure the inode btrees are as large as the rmap thinks they are.
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* Don't bother if we're missing btree cursors, as we're already corrupt.
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*/
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STATIC void
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xchk_iallocbt_xref_rmap_btreeblks(
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struct xfs_scrub *sc,
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int which)
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{
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struct xfs_owner_info oinfo;
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xfs_filblks_t blocks;
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xfs_extlen_t inobt_blocks = 0;
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xfs_extlen_t finobt_blocks = 0;
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int error;
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if (!sc->sa.ino_cur || !sc->sa.rmap_cur ||
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(xfs_sb_version_hasfinobt(&sc->mp->m_sb) && !sc->sa.fino_cur) ||
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xchk_skip_xref(sc->sm))
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return;
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/* Check that we saw as many inobt blocks as the rmap says. */
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error = xfs_btree_count_blocks(sc->sa.ino_cur, &inobt_blocks);
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if (!xchk_process_error(sc, 0, 0, &error))
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return;
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if (sc->sa.fino_cur) {
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error = xfs_btree_count_blocks(sc->sa.fino_cur, &finobt_blocks);
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if (!xchk_process_error(sc, 0, 0, &error))
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return;
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}
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INOBT);
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error = xchk_count_rmap_ownedby_ag(sc, sc->sa.rmap_cur, &oinfo,
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&blocks);
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if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
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return;
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if (blocks != inobt_blocks + finobt_blocks)
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xchk_btree_set_corrupt(sc, sc->sa.ino_cur, 0);
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}
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/*
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* Make sure that the inobt records point to the same number of blocks as
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* the rmap says are owned by inodes.
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*/
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STATIC void
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xchk_iallocbt_xref_rmap_inodes(
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struct xfs_scrub *sc,
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int which,
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xfs_filblks_t inode_blocks)
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{
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struct xfs_owner_info oinfo;
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xfs_filblks_t blocks;
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int error;
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if (!sc->sa.rmap_cur || xchk_skip_xref(sc->sm))
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return;
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/* Check that we saw as many inode blocks as the rmap knows about. */
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
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error = xchk_count_rmap_ownedby_ag(sc, sc->sa.rmap_cur, &oinfo,
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&blocks);
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if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
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return;
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if (blocks != inode_blocks)
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xchk_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0);
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}
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/* Scrub the inode btrees for some AG. */
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STATIC int
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xchk_iallocbt(
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struct xfs_scrub *sc,
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xfs_btnum_t which)
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{
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struct xfs_btree_cur *cur;
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struct xfs_owner_info oinfo;
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xfs_filblks_t inode_blocks = 0;
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int error;
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INOBT);
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cur = which == XFS_BTNUM_INO ? sc->sa.ino_cur : sc->sa.fino_cur;
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error = xchk_btree(sc, cur, xchk_iallocbt_rec, &oinfo,
|
|
&inode_blocks);
|
|
if (error)
|
|
return error;
|
|
|
|
xchk_iallocbt_xref_rmap_btreeblks(sc, which);
|
|
|
|
/*
|
|
* If we're scrubbing the inode btree, inode_blocks is the number of
|
|
* blocks pointed to by all the inode chunk records. Therefore, we
|
|
* should compare to the number of inode chunk blocks that the rmap
|
|
* knows about. We can't do this for the finobt since it only points
|
|
* to inode chunks with free inodes.
|
|
*/
|
|
if (which == XFS_BTNUM_INO)
|
|
xchk_iallocbt_xref_rmap_inodes(sc, which, inode_blocks);
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xchk_inobt(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
return xchk_iallocbt(sc, XFS_BTNUM_INO);
|
|
}
|
|
|
|
int
|
|
xchk_finobt(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
return xchk_iallocbt(sc, XFS_BTNUM_FINO);
|
|
}
|
|
|
|
/* See if an inode btree has (or doesn't have) an inode chunk record. */
|
|
static inline void
|
|
xchk_xref_inode_check(
|
|
struct xfs_scrub *sc,
|
|
xfs_agblock_t agbno,
|
|
xfs_extlen_t len,
|
|
struct xfs_btree_cur **icur,
|
|
bool should_have_inodes)
|
|
{
|
|
bool has_inodes;
|
|
int error;
|
|
|
|
if (!(*icur) || xchk_skip_xref(sc->sm))
|
|
return;
|
|
|
|
error = xfs_ialloc_has_inodes_at_extent(*icur, agbno, len, &has_inodes);
|
|
if (!xchk_should_check_xref(sc, &error, icur))
|
|
return;
|
|
if (has_inodes != should_have_inodes)
|
|
xchk_btree_xref_set_corrupt(sc, *icur, 0);
|
|
}
|
|
|
|
/* xref check that the extent is not covered by inodes */
|
|
void
|
|
xchk_xref_is_not_inode_chunk(
|
|
struct xfs_scrub *sc,
|
|
xfs_agblock_t agbno,
|
|
xfs_extlen_t len)
|
|
{
|
|
xchk_xref_inode_check(sc, agbno, len, &sc->sa.ino_cur, false);
|
|
xchk_xref_inode_check(sc, agbno, len, &sc->sa.fino_cur, false);
|
|
}
|
|
|
|
/* xref check that the extent is covered by inodes */
|
|
void
|
|
xchk_xref_is_inode_chunk(
|
|
struct xfs_scrub *sc,
|
|
xfs_agblock_t agbno,
|
|
xfs_extlen_t len)
|
|
{
|
|
xchk_xref_inode_check(sc, agbno, len, &sc->sa.ino_cur, true);
|
|
}
|