1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_trans_resv.h"
11 #include "xfs_mount.h"
12 #include "xfs_log_format.h"
13 #include "xfs_trans.h"
14 #include "xfs_inode.h"
15 #include "xfs_quota.h"
17 #include "scrub/scrub.h"
18 #include "scrub/common.h"
20 /* Convert a scrub type code to a DQ flag, or return 0 if error. */
25 switch (sc->sm->sm_type) {
26 case XFS_SCRUB_TYPE_UQUOTA:
28 case XFS_SCRUB_TYPE_GQUOTA:
30 case XFS_SCRUB_TYPE_PQUOTA:
37 /* Set us up to scrub a quota. */
46 if (!XFS_IS_QUOTA_RUNNING(sc->mp) || !XFS_IS_QUOTA_ON(sc->mp))
49 dqtype = xchk_quota_to_dqtype(sc);
52 sc->flags |= XCHK_HAS_QUOTAOFFLOCK;
53 mutex_lock(&sc->mp->m_quotainfo->qi_quotaofflock);
54 if (!xfs_this_quota_on(sc->mp, dqtype))
56 error = xchk_setup_fs(sc, ip);
59 sc->ip = xfs_quota_inode(sc->mp, dqtype);
60 xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
61 sc->ilock_flags = XFS_ILOCK_EXCL;
67 struct xchk_quota_info {
72 /* Scrub the fields in an individual quota item. */
79 struct xchk_quota_info *sqi = priv;
80 struct xfs_scrub *sc = sqi->sc;
81 struct xfs_mount *mp = sc->mp;
82 struct xfs_disk_dquot *d = &dq->q_core;
83 struct xfs_quotainfo *qi = mp->m_quotainfo;
85 unsigned long long bsoft;
86 unsigned long long isoft;
87 unsigned long long rsoft;
88 unsigned long long bhard;
89 unsigned long long ihard;
90 unsigned long long rhard;
91 unsigned long long bcount;
92 unsigned long long icount;
93 unsigned long long rcount;
95 xfs_dqid_t id = be32_to_cpu(d->d_id);
98 * Except for the root dquot, the actual dquot we got must either have
99 * the same or higher id as we saw before.
101 offset = id / qi->qi_dqperchunk;
102 if (id && id <= sqi->last_id)
103 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
107 /* Did we get the dquot type we wanted? */
108 if (dqtype != (d->d_flags & XFS_DQ_ALLTYPES))
109 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
111 if (d->d_pad0 != cpu_to_be32(0) || d->d_pad != cpu_to_be16(0))
112 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
114 /* Check the limits. */
115 bhard = be64_to_cpu(d->d_blk_hardlimit);
116 ihard = be64_to_cpu(d->d_ino_hardlimit);
117 rhard = be64_to_cpu(d->d_rtb_hardlimit);
119 bsoft = be64_to_cpu(d->d_blk_softlimit);
120 isoft = be64_to_cpu(d->d_ino_softlimit);
121 rsoft = be64_to_cpu(d->d_rtb_softlimit);
124 * Warn if the hard limits are larger than the fs.
125 * Administrators can do this, though in production this seems
126 * suspect, which is why we flag it for review.
128 * Complain about corruption if the soft limit is greater than
131 if (bhard > mp->m_sb.sb_dblocks)
132 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
134 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
136 if (ihard > M_IGEO(mp)->maxicount)
137 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
139 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
141 if (rhard > mp->m_sb.sb_rblocks)
142 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
144 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
146 /* Check the resource counts. */
147 bcount = be64_to_cpu(d->d_bcount);
148 icount = be64_to_cpu(d->d_icount);
149 rcount = be64_to_cpu(d->d_rtbcount);
150 fs_icount = percpu_counter_sum(&mp->m_icount);
153 * Check that usage doesn't exceed physical limits. However, on
154 * a reflink filesystem we're allowed to exceed physical space
155 * if there are no quota limits.
157 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
158 if (mp->m_sb.sb_dblocks < bcount)
159 xchk_fblock_set_warning(sc, XFS_DATA_FORK,
162 if (mp->m_sb.sb_dblocks < bcount)
163 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
166 if (icount > fs_icount || rcount > mp->m_sb.sb_rblocks)
167 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
170 * We can violate the hard limits if the admin suddenly sets a
171 * lower limit than the actual usage. However, we flag it for
174 if (id != 0 && bhard != 0 && bcount > bhard)
175 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
176 if (id != 0 && ihard != 0 && icount > ihard)
177 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
178 if (id != 0 && rhard != 0 && rcount > rhard)
179 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
184 /* Check the quota's data fork. */
186 xchk_quota_data_fork(
187 struct xfs_scrub *sc)
189 struct xfs_bmbt_irec irec = { 0 };
190 struct xfs_iext_cursor icur;
191 struct xfs_quotainfo *qi = sc->mp->m_quotainfo;
192 struct xfs_ifork *ifp;
193 xfs_fileoff_t max_dqid_off;
196 /* Invoke the fork scrubber. */
197 error = xchk_metadata_inode_forks(sc);
198 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
201 /* Check for data fork problems that apply only to quota files. */
202 max_dqid_off = ((xfs_dqid_t)-1) / qi->qi_dqperchunk;
203 ifp = XFS_IFORK_PTR(sc->ip, XFS_DATA_FORK);
204 for_each_xfs_iext(ifp, &icur, &irec) {
205 if (xchk_should_terminate(sc, &error))
208 * delalloc extents or blocks mapped above the highest
209 * quota id shouldn't happen.
211 if (isnullstartblock(irec.br_startblock) ||
212 irec.br_startoff > max_dqid_off ||
213 irec.br_startoff + irec.br_blockcount - 1 > max_dqid_off) {
214 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
223 /* Scrub all of a quota type's items. */
226 struct xfs_scrub *sc)
228 struct xchk_quota_info sqi;
229 struct xfs_mount *mp = sc->mp;
230 struct xfs_quotainfo *qi = mp->m_quotainfo;
234 dqtype = xchk_quota_to_dqtype(sc);
236 /* Look for problem extents. */
237 error = xchk_quota_data_fork(sc);
240 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
244 * Check all the quota items. Now that we've checked the quota inode
245 * data fork we have to drop ILOCK_EXCL to use the regular dquot
248 xfs_iunlock(sc->ip, sc->ilock_flags);
252 error = xfs_qm_dqiterate(mp, dqtype, xchk_quota_item, &sqi);
253 sc->ilock_flags = XFS_ILOCK_EXCL;
254 xfs_ilock(sc->ip, sc->ilock_flags);
255 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK,
256 sqi.last_id * qi->qi_dqperchunk, &error))