1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2017-2023 Oracle. All Rights Reserved.
8 #include "xfs_shared.h"
10 #include "xfs_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_log_format.h"
14 #include "xfs_trans.h"
15 #include "xfs_inode.h"
16 #include "xfs_quota.h"
19 #include "scrub/scrub.h"
20 #include "scrub/common.h"
21 #include "scrub/quota.h"
23 /* Convert a scrub type code to a DQ flag, or return 0 if error. */
28 switch (sc->sm->sm_type) {
29 case XFS_SCRUB_TYPE_UQUOTA:
30 return XFS_DQTYPE_USER;
31 case XFS_SCRUB_TYPE_GQUOTA:
32 return XFS_DQTYPE_GROUP;
33 case XFS_SCRUB_TYPE_PQUOTA:
34 return XFS_DQTYPE_PROJ;
40 /* Set us up to scrub a quota. */
48 if (!XFS_IS_QUOTA_ON(sc->mp))
51 dqtype = xchk_quota_to_dqtype(sc);
55 if (!xfs_this_quota_on(sc->mp, dqtype))
58 if (xchk_need_intent_drain(sc))
59 xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);
61 error = xchk_setup_fs(sc);
65 error = xchk_install_live_inode(sc, xfs_quota_inode(sc->mp, dqtype));
69 xchk_ilock(sc, XFS_ILOCK_EXCL);
75 struct xchk_quota_info {
80 /* There's a written block backing this dquot, right? */
87 struct xfs_bmbt_irec irec;
88 struct xfs_mount *mp = sc->mp;
92 if (!xfs_verify_fileoff(mp, offset)) {
93 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
97 if (dq->q_fileoffset != offset) {
98 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
102 error = xfs_bmapi_read(sc->ip, offset, 1, &irec, &nmaps, 0);
107 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
111 if (!xfs_verify_fsbno(mp, irec.br_startblock))
112 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
113 if (XFS_FSB_TO_DADDR(mp, irec.br_startblock) != dq->q_blkno)
114 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
115 if (!xfs_bmap_is_written_extent(&irec))
116 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
121 /* Complain if a quota timer is incorrectly set. */
123 xchk_quota_item_timer(
124 struct xfs_scrub *sc,
125 xfs_fileoff_t offset,
126 const struct xfs_dquot_res *res)
128 if ((res->softlimit && res->count > res->softlimit) ||
129 (res->hardlimit && res->count > res->hardlimit)) {
131 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
134 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
138 /* Scrub the fields in an individual quota item. */
141 struct xchk_quota_info *sqi,
142 struct xfs_dquot *dq)
144 struct xfs_scrub *sc = sqi->sc;
145 struct xfs_mount *mp = sc->mp;
146 struct xfs_quotainfo *qi = mp->m_quotainfo;
147 xfs_fileoff_t offset;
151 if (xchk_should_terminate(sc, &error))
155 * We want to validate the bmap record for the storage backing this
156 * dquot, so we need to lock the dquot and the quota file. For quota
157 * operations, the locking order is first the ILOCK and then the dquot.
158 * However, dqiterate gave us a locked dquot, so drop the dquot lock to
162 xchk_ilock(sc, XFS_ILOCK_SHARED);
166 * Except for the root dquot, the actual dquot we got must either have
167 * the same or higher id as we saw before.
169 offset = dq->q_id / qi->qi_dqperchunk;
170 if (dq->q_id && dq->q_id <= sqi->last_id)
171 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
173 sqi->last_id = dq->q_id;
175 error = xchk_quota_item_bmap(sc, dq, offset);
176 xchk_iunlock(sc, XFS_ILOCK_SHARED);
177 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, offset, &error))
181 * Warn if the hard limits are larger than the fs.
182 * Administrators can do this, though in production this seems
183 * suspect, which is why we flag it for review.
185 * Complain about corruption if the soft limit is greater than
188 if (dq->q_blk.hardlimit > mp->m_sb.sb_dblocks)
189 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
190 if (dq->q_blk.softlimit > dq->q_blk.hardlimit)
191 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
193 if (dq->q_ino.hardlimit > M_IGEO(mp)->maxicount)
194 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
195 if (dq->q_ino.softlimit > dq->q_ino.hardlimit)
196 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
198 if (dq->q_rtb.hardlimit > mp->m_sb.sb_rblocks)
199 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
200 if (dq->q_rtb.softlimit > dq->q_rtb.hardlimit)
201 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
203 /* Check the resource counts. */
204 fs_icount = percpu_counter_sum(&mp->m_icount);
207 * Check that usage doesn't exceed physical limits. However, on
208 * a reflink filesystem we're allowed to exceed physical space
209 * if there are no quota limits.
211 if (xfs_has_reflink(mp)) {
212 if (mp->m_sb.sb_dblocks < dq->q_blk.count)
213 xchk_fblock_set_warning(sc, XFS_DATA_FORK,
216 if (mp->m_sb.sb_dblocks < dq->q_blk.count)
217 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
220 if (dq->q_ino.count > fs_icount || dq->q_rtb.count > mp->m_sb.sb_rblocks)
221 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
224 * We can violate the hard limits if the admin suddenly sets a
225 * lower limit than the actual usage. However, we flag it for
231 if (dq->q_blk.hardlimit != 0 &&
232 dq->q_blk.count > dq->q_blk.hardlimit)
233 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
235 if (dq->q_ino.hardlimit != 0 &&
236 dq->q_ino.count > dq->q_ino.hardlimit)
237 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
239 if (dq->q_rtb.hardlimit != 0 &&
240 dq->q_rtb.count > dq->q_rtb.hardlimit)
241 xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
243 xchk_quota_item_timer(sc, offset, &dq->q_blk);
244 xchk_quota_item_timer(sc, offset, &dq->q_ino);
245 xchk_quota_item_timer(sc, offset, &dq->q_rtb);
248 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
254 /* Check the quota's data fork. */
256 xchk_quota_data_fork(
257 struct xfs_scrub *sc)
259 struct xfs_bmbt_irec irec = { 0 };
260 struct xfs_iext_cursor icur;
261 struct xfs_quotainfo *qi = sc->mp->m_quotainfo;
262 struct xfs_ifork *ifp;
263 xfs_fileoff_t max_dqid_off;
266 /* Invoke the fork scrubber. */
267 error = xchk_metadata_inode_forks(sc);
268 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
271 /* Check for data fork problems that apply only to quota files. */
272 max_dqid_off = XFS_DQ_ID_MAX / qi->qi_dqperchunk;
273 ifp = xfs_ifork_ptr(sc->ip, XFS_DATA_FORK);
274 for_each_xfs_iext(ifp, &icur, &irec) {
275 if (xchk_should_terminate(sc, &error))
279 * delalloc/unwritten extents or blocks mapped above the highest
280 * quota id shouldn't happen.
282 if (!xfs_bmap_is_written_extent(&irec) ||
283 irec.br_startoff > max_dqid_off ||
284 irec.br_startoff + irec.br_blockcount - 1 > max_dqid_off) {
285 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK,
294 /* Scrub all of a quota type's items. */
297 struct xfs_scrub *sc)
299 struct xchk_dqiter cursor = { };
300 struct xchk_quota_info sqi = { .sc = sc };
301 struct xfs_mount *mp = sc->mp;
302 struct xfs_quotainfo *qi = mp->m_quotainfo;
303 struct xfs_dquot *dq;
307 dqtype = xchk_quota_to_dqtype(sc);
309 /* Look for problem extents. */
310 error = xchk_quota_data_fork(sc);
313 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
317 * Check all the quota items. Now that we've checked the quota inode
318 * data fork we have to drop ILOCK_EXCL to use the regular dquot
321 xchk_iunlock(sc, sc->ilock_flags);
323 /* Now look for things that the quota verifiers won't complain about. */
324 xchk_dqiter_init(&cursor, sc, dqtype);
325 while ((error = xchk_dquot_iter(&cursor, &dq)) == 1) {
326 error = xchk_quota_item(&sqi, dq);
331 if (error == -ECANCELED)
333 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK,
334 sqi.last_id * qi->qi_dqperchunk, &error))