305 lines
8.4 KiB
C
305 lines
8.4 KiB
C
/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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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_inode_fork.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_quota.h"
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#include "xfs_qm.h"
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#include "xfs_dquot.h"
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#include "xfs_dquot_item.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/trace.h"
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/* Convert a scrub type code to a DQ flag, or return 0 if error. */
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static inline uint
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xfs_scrub_quota_to_dqtype(
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struct xfs_scrub_context *sc)
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{
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switch (sc->sm->sm_type) {
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case XFS_SCRUB_TYPE_UQUOTA:
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return XFS_DQ_USER;
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case XFS_SCRUB_TYPE_GQUOTA:
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return XFS_DQ_GROUP;
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case XFS_SCRUB_TYPE_PQUOTA:
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return XFS_DQ_PROJ;
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default:
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return 0;
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}
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}
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/* Set us up to scrub a quota. */
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int
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xfs_scrub_setup_quota(
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struct xfs_scrub_context *sc,
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struct xfs_inode *ip)
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{
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uint dqtype;
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/*
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* If userspace gave us an AG number or inode data, they don't
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* know what they're doing. Get out.
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*/
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if (sc->sm->sm_agno || sc->sm->sm_ino || sc->sm->sm_gen)
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return -EINVAL;
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dqtype = xfs_scrub_quota_to_dqtype(sc);
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if (dqtype == 0)
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return -EINVAL;
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if (!xfs_this_quota_on(sc->mp, dqtype))
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return -ENOENT;
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return 0;
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}
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/* Quotas. */
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/* Scrub the fields in an individual quota item. */
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STATIC void
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xfs_scrub_quota_item(
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struct xfs_scrub_context *sc,
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uint dqtype,
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struct xfs_dquot *dq,
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xfs_dqid_t id)
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{
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struct xfs_mount *mp = sc->mp;
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struct xfs_disk_dquot *d = &dq->q_core;
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struct xfs_quotainfo *qi = mp->m_quotainfo;
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xfs_fileoff_t offset;
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unsigned long long bsoft;
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unsigned long long isoft;
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unsigned long long rsoft;
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unsigned long long bhard;
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unsigned long long ihard;
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unsigned long long rhard;
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unsigned long long bcount;
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unsigned long long icount;
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unsigned long long rcount;
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xfs_ino_t fs_icount;
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offset = id / qi->qi_dqperchunk;
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/*
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* We fed $id and DQNEXT into the xfs_qm_dqget call, which means
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* that the actual dquot we got must either have the same id or
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* the next higher id.
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*/
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if (id > be32_to_cpu(d->d_id))
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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/* Did we get the dquot type we wanted? */
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if (dqtype != (d->d_flags & XFS_DQ_ALLTYPES))
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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if (d->d_pad0 != cpu_to_be32(0) || d->d_pad != cpu_to_be16(0))
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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/* Check the limits. */
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bhard = be64_to_cpu(d->d_blk_hardlimit);
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ihard = be64_to_cpu(d->d_ino_hardlimit);
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rhard = be64_to_cpu(d->d_rtb_hardlimit);
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bsoft = be64_to_cpu(d->d_blk_softlimit);
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isoft = be64_to_cpu(d->d_ino_softlimit);
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rsoft = be64_to_cpu(d->d_rtb_softlimit);
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/*
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* Warn if the hard limits are larger than the fs.
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* Administrators can do this, though in production this seems
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* suspect, which is why we flag it for review.
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*
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* Complain about corruption if the soft limit is greater than
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* the hard limit.
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*/
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if (bhard > mp->m_sb.sb_dblocks)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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if (bsoft > bhard)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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if (ihard > mp->m_maxicount)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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if (isoft > ihard)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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if (rhard > mp->m_sb.sb_rblocks)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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if (rsoft > rhard)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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/* Check the resource counts. */
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bcount = be64_to_cpu(d->d_bcount);
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icount = be64_to_cpu(d->d_icount);
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rcount = be64_to_cpu(d->d_rtbcount);
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fs_icount = percpu_counter_sum(&mp->m_icount);
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/*
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* Check that usage doesn't exceed physical limits. However, on
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* a reflink filesystem we're allowed to exceed physical space
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* if there are no quota limits.
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*/
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if (xfs_sb_version_hasreflink(&mp->m_sb)) {
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if (mp->m_sb.sb_dblocks < bcount)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK,
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offset);
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} else {
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if (mp->m_sb.sb_dblocks < bcount)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
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offset);
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}
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if (icount > fs_icount || rcount > mp->m_sb.sb_rblocks)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
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/*
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* We can violate the hard limits if the admin suddenly sets a
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* lower limit than the actual usage. However, we flag it for
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* admin review.
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*/
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if (id != 0 && bhard != 0 && bcount > bhard)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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if (id != 0 && ihard != 0 && icount > ihard)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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if (id != 0 && rhard != 0 && rcount > rhard)
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xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
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}
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/* Scrub all of a quota type's items. */
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int
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xfs_scrub_quota(
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struct xfs_scrub_context *sc)
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{
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struct xfs_bmbt_irec irec = { 0 };
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struct xfs_mount *mp = sc->mp;
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struct xfs_inode *ip;
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struct xfs_quotainfo *qi = mp->m_quotainfo;
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struct xfs_dquot *dq;
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xfs_fileoff_t max_dqid_off;
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xfs_fileoff_t off = 0;
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xfs_dqid_t id = 0;
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uint dqtype;
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int nimaps;
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int error = 0;
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if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
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return -ENOENT;
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mutex_lock(&qi->qi_quotaofflock);
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dqtype = xfs_scrub_quota_to_dqtype(sc);
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if (!xfs_this_quota_on(sc->mp, dqtype)) {
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error = -ENOENT;
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goto out_unlock_quota;
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}
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/* Attach to the quota inode and set sc->ip so that reporting works. */
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ip = xfs_quota_inode(sc->mp, dqtype);
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sc->ip = ip;
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/* Look for problem extents. */
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) {
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xfs_scrub_ino_set_corrupt(sc, sc->ip->i_ino, NULL);
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goto out_unlock_inode;
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}
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max_dqid_off = ((xfs_dqid_t)-1) / qi->qi_dqperchunk;
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while (1) {
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if (xfs_scrub_should_terminate(sc, &error))
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break;
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off = irec.br_startoff + irec.br_blockcount;
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nimaps = 1;
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error = xfs_bmapi_read(ip, off, -1, &irec, &nimaps,
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XFS_BMAPI_ENTIRE);
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if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, off,
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&error))
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goto out_unlock_inode;
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if (!nimaps)
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break;
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if (irec.br_startblock == HOLESTARTBLOCK)
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continue;
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/* Check the extent record doesn't point to crap. */
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if (irec.br_startblock + irec.br_blockcount <=
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irec.br_startblock)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
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irec.br_startoff);
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if (!xfs_verify_fsbno(mp, irec.br_startblock) ||
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!xfs_verify_fsbno(mp, irec.br_startblock +
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irec.br_blockcount - 1))
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
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irec.br_startoff);
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/*
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* Unwritten extents or blocks mapped above the highest
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* quota id shouldn't happen.
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*/
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if (isnullstartblock(irec.br_startblock) ||
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irec.br_startoff > max_dqid_off ||
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irec.br_startoff + irec.br_blockcount > max_dqid_off + 1)
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xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
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}
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
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goto out;
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/* Check all the quota items. */
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while (id < ((xfs_dqid_t)-1ULL)) {
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if (xfs_scrub_should_terminate(sc, &error))
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break;
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error = xfs_qm_dqget(mp, NULL, id, dqtype, XFS_QMOPT_DQNEXT,
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&dq);
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if (error == -ENOENT)
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break;
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if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK,
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id * qi->qi_dqperchunk, &error))
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break;
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xfs_scrub_quota_item(sc, dqtype, dq, id);
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id = be32_to_cpu(dq->q_core.d_id) + 1;
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xfs_qm_dqput(dq);
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if (!id)
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break;
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}
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out:
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/* We set sc->ip earlier, so make sure we clear it now. */
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sc->ip = NULL;
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out_unlock_quota:
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mutex_unlock(&qi->qi_quotaofflock);
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return error;
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out_unlock_inode:
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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goto out;
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}
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