2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * Copyright (c) 2013 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_shared.h"
22 #include "xfs_format.h"
23 #include "xfs_log_format.h"
24 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_inode.h"
29 #include "xfs_quota.h"
30 #include "xfs_trans.h"
32 #include "xfs_error.h"
33 #include "xfs_cksum.h"
34 #include "xfs_trace.h"
37 xfs_calc_dquots_per_chunk(
39 unsigned int nbblks) /* basic block units */
44 ndquots = BBTOB(nbblks);
45 do_div(ndquots, sizeof(xfs_dqblk_t));
51 * Do some primitive error checking on ondisk dquot data structures.
56 xfs_disk_dquot_t *ddq,
58 uint type, /* used only when IO_dorepair is true */
62 xfs_dqblk_t *d = (xfs_dqblk_t *)ddq;
66 * We can encounter an uninitialized dquot buffer for 2 reasons:
67 * 1. If we crash while deleting the quotainode(s), and those blks got
68 * used for user data. This is because we take the path of regular
69 * file deletion; however, the size field of quotainodes is never
70 * updated, so all the tricks that we play in itruncate_finish
73 * 2. We don't play the quota buffers when there's a quotaoff logitem.
74 * But the allocation will be replayed so we'll end up with an
75 * uninitialized quota block.
77 * This is all fine; things are still consistent, and we haven't lost
78 * any quota information. Just don't complain about bad dquot blks.
80 if (ddq->d_magic != cpu_to_be16(XFS_DQUOT_MAGIC)) {
81 if (flags & XFS_QMOPT_DOWARN)
83 "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x",
84 str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC);
87 if (ddq->d_version != XFS_DQUOT_VERSION) {
88 if (flags & XFS_QMOPT_DOWARN)
90 "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x",
91 str, id, ddq->d_version, XFS_DQUOT_VERSION);
95 if (ddq->d_flags != XFS_DQ_USER &&
96 ddq->d_flags != XFS_DQ_PROJ &&
97 ddq->d_flags != XFS_DQ_GROUP) {
98 if (flags & XFS_QMOPT_DOWARN)
100 "%s : XFS dquot ID 0x%x, unknown flags 0x%x",
101 str, id, ddq->d_flags);
105 if (id != -1 && id != be32_to_cpu(ddq->d_id)) {
106 if (flags & XFS_QMOPT_DOWARN)
108 "%s : ondisk-dquot 0x%p, ID mismatch: "
109 "0x%x expected, found id 0x%x",
110 str, ddq, id, be32_to_cpu(ddq->d_id));
114 if (!errs && ddq->d_id) {
115 if (ddq->d_blk_softlimit &&
116 be64_to_cpu(ddq->d_bcount) >
117 be64_to_cpu(ddq->d_blk_softlimit)) {
118 if (!ddq->d_btimer) {
119 if (flags & XFS_QMOPT_DOWARN)
121 "%s : Dquot ID 0x%x (0x%p) BLK TIMER NOT STARTED",
122 str, (int)be32_to_cpu(ddq->d_id), ddq);
126 if (ddq->d_ino_softlimit &&
127 be64_to_cpu(ddq->d_icount) >
128 be64_to_cpu(ddq->d_ino_softlimit)) {
129 if (!ddq->d_itimer) {
130 if (flags & XFS_QMOPT_DOWARN)
132 "%s : Dquot ID 0x%x (0x%p) INODE TIMER NOT STARTED",
133 str, (int)be32_to_cpu(ddq->d_id), ddq);
137 if (ddq->d_rtb_softlimit &&
138 be64_to_cpu(ddq->d_rtbcount) >
139 be64_to_cpu(ddq->d_rtb_softlimit)) {
140 if (!ddq->d_rtbtimer) {
141 if (flags & XFS_QMOPT_DOWARN)
143 "%s : Dquot ID 0x%x (0x%p) RTBLK TIMER NOT STARTED",
144 str, (int)be32_to_cpu(ddq->d_id), ddq);
150 if (!errs || !(flags & XFS_QMOPT_DQREPAIR))
153 if (flags & XFS_QMOPT_DOWARN)
154 xfs_notice(mp, "Re-initializing dquot ID 0x%x", id);
157 * Typically, a repair is only requested by quotacheck.
160 ASSERT(flags & XFS_QMOPT_DQREPAIR);
161 memset(d, 0, sizeof(xfs_dqblk_t));
163 d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
164 d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
165 d->dd_diskdq.d_flags = type;
166 d->dd_diskdq.d_id = cpu_to_be32(id);
168 if (xfs_sb_version_hascrc(&mp->m_sb)) {
169 uuid_copy(&d->dd_uuid, &mp->m_sb.sb_uuid);
170 xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
178 xfs_dquot_buf_verify_crc(
179 struct xfs_mount *mp,
182 struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
186 if (!xfs_sb_version_hascrc(&mp->m_sb))
190 * if we are in log recovery, the quota subsystem has not been
191 * initialised so we have no quotainfo structure. In that case, we need
192 * to manually calculate the number of dquots in the buffer.
195 ndquots = mp->m_quotainfo->qi_dqperchunk;
197 ndquots = xfs_calc_dquots_per_chunk(mp,
198 XFS_BB_TO_FSB(mp, bp->b_length));
200 for (i = 0; i < ndquots; i++, d++) {
201 if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk),
204 if (!uuid_equal(&d->dd_uuid, &mp->m_sb.sb_uuid))
211 xfs_dquot_buf_verify(
212 struct xfs_mount *mp,
215 struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
221 * if we are in log recovery, the quota subsystem has not been
222 * initialised so we have no quotainfo structure. In that case, we need
223 * to manually calculate the number of dquots in the buffer.
226 ndquots = mp->m_quotainfo->qi_dqperchunk;
228 ndquots = xfs_calc_dquots_per_chunk(mp, bp->b_length);
231 * On the first read of the buffer, verify that each dquot is valid.
232 * We don't know what the id of the dquot is supposed to be, just that
233 * they should be increasing monotonically within the buffer. If the
234 * first id is corrupt, then it will fail on the second dquot in the
235 * buffer so corruptions could point to the wrong dquot in this case.
237 for (i = 0; i < ndquots; i++) {
238 struct xfs_disk_dquot *ddq;
241 ddq = &d[i].dd_diskdq;
244 id = be32_to_cpu(ddq->d_id);
246 error = xfs_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN,
247 "xfs_dquot_buf_verify");
255 xfs_dquot_buf_read_verify(
258 struct xfs_mount *mp = bp->b_target->bt_mount;
260 if (!xfs_dquot_buf_verify_crc(mp, bp))
261 xfs_buf_ioerror(bp, EFSBADCRC);
262 else if (!xfs_dquot_buf_verify(mp, bp))
263 xfs_buf_ioerror(bp, EFSCORRUPTED);
266 xfs_verifier_error(bp);
270 * we don't calculate the CRC here as that is done when the dquot is flushed to
271 * the buffer after the update is done. This ensures that the dquot in the
272 * buffer always has an up-to-date CRC value.
275 xfs_dquot_buf_write_verify(
278 struct xfs_mount *mp = bp->b_target->bt_mount;
280 if (!xfs_dquot_buf_verify(mp, bp)) {
281 xfs_buf_ioerror(bp, EFSCORRUPTED);
282 xfs_verifier_error(bp);
287 const struct xfs_buf_ops xfs_dquot_buf_ops = {
288 .verify_read = xfs_dquot_buf_read_verify,
289 .verify_write = xfs_dquot_buf_write_verify,