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"
25 #include "xfs_mount.h"
26 #include "xfs_inode.h"
27 #include "xfs_quota.h"
28 #include "xfs_trans.h"
30 #include "xfs_error.h"
31 #include "xfs_cksum.h"
32 #include "xfs_trace.h"
35 xfs_calc_dquots_per_chunk(
36 unsigned int nbblks) /* basic block units */
41 ndquots = BBTOB(nbblks);
42 do_div(ndquots, sizeof(xfs_dqblk_t));
48 * Do some primitive error checking on ondisk dquot data structures.
53 xfs_disk_dquot_t *ddq,
55 uint type, /* used only when IO_dorepair is true */
59 xfs_dqblk_t *d = (xfs_dqblk_t *)ddq;
63 * We can encounter an uninitialized dquot buffer for 2 reasons:
64 * 1. If we crash while deleting the quotainode(s), and those blks got
65 * used for user data. This is because we take the path of regular
66 * file deletion; however, the size field of quotainodes is never
67 * updated, so all the tricks that we play in itruncate_finish
70 * 2. We don't play the quota buffers when there's a quotaoff logitem.
71 * But the allocation will be replayed so we'll end up with an
72 * uninitialized quota block.
74 * This is all fine; things are still consistent, and we haven't lost
75 * any quota information. Just don't complain about bad dquot blks.
77 if (ddq->d_magic != cpu_to_be16(XFS_DQUOT_MAGIC)) {
78 if (flags & XFS_QMOPT_DOWARN)
80 "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x",
81 str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC);
84 if (ddq->d_version != XFS_DQUOT_VERSION) {
85 if (flags & XFS_QMOPT_DOWARN)
87 "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x",
88 str, id, ddq->d_version, XFS_DQUOT_VERSION);
92 if (ddq->d_flags != XFS_DQ_USER &&
93 ddq->d_flags != XFS_DQ_PROJ &&
94 ddq->d_flags != XFS_DQ_GROUP) {
95 if (flags & XFS_QMOPT_DOWARN)
97 "%s : XFS dquot ID 0x%x, unknown flags 0x%x",
98 str, id, ddq->d_flags);
102 if (id != -1 && id != be32_to_cpu(ddq->d_id)) {
103 if (flags & XFS_QMOPT_DOWARN)
105 "%s : ondisk-dquot 0x%p, ID mismatch: "
106 "0x%x expected, found id 0x%x",
107 str, ddq, id, be32_to_cpu(ddq->d_id));
111 if (!errs && ddq->d_id) {
112 if (ddq->d_blk_softlimit &&
113 be64_to_cpu(ddq->d_bcount) >
114 be64_to_cpu(ddq->d_blk_softlimit)) {
115 if (!ddq->d_btimer) {
116 if (flags & XFS_QMOPT_DOWARN)
118 "%s : Dquot ID 0x%x (0x%p) BLK TIMER NOT STARTED",
119 str, (int)be32_to_cpu(ddq->d_id), ddq);
123 if (ddq->d_ino_softlimit &&
124 be64_to_cpu(ddq->d_icount) >
125 be64_to_cpu(ddq->d_ino_softlimit)) {
126 if (!ddq->d_itimer) {
127 if (flags & XFS_QMOPT_DOWARN)
129 "%s : Dquot ID 0x%x (0x%p) INODE TIMER NOT STARTED",
130 str, (int)be32_to_cpu(ddq->d_id), ddq);
134 if (ddq->d_rtb_softlimit &&
135 be64_to_cpu(ddq->d_rtbcount) >
136 be64_to_cpu(ddq->d_rtb_softlimit)) {
137 if (!ddq->d_rtbtimer) {
138 if (flags & XFS_QMOPT_DOWARN)
140 "%s : Dquot ID 0x%x (0x%p) RTBLK TIMER NOT STARTED",
141 str, (int)be32_to_cpu(ddq->d_id), ddq);
147 if (!errs || !(flags & XFS_QMOPT_DQREPAIR))
150 if (flags & XFS_QMOPT_DOWARN)
151 xfs_notice(mp, "Re-initializing dquot ID 0x%x", id);
154 * Typically, a repair is only requested by quotacheck.
157 ASSERT(flags & XFS_QMOPT_DQREPAIR);
158 memset(d, 0, sizeof(xfs_dqblk_t));
160 d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
161 d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
162 d->dd_diskdq.d_flags = type;
163 d->dd_diskdq.d_id = cpu_to_be32(id);
165 if (xfs_sb_version_hascrc(&mp->m_sb)) {
166 uuid_copy(&d->dd_uuid, &mp->m_sb.sb_meta_uuid);
167 xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
175 xfs_dquot_buf_verify_crc(
176 struct xfs_mount *mp,
179 struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
183 if (!xfs_sb_version_hascrc(&mp->m_sb))
187 * if we are in log recovery, the quota subsystem has not been
188 * initialised so we have no quotainfo structure. In that case, we need
189 * to manually calculate the number of dquots in the buffer.
192 ndquots = mp->m_quotainfo->qi_dqperchunk;
194 ndquots = xfs_calc_dquots_per_chunk(bp->b_length);
196 for (i = 0; i < ndquots; i++, d++) {
197 if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk),
200 if (!uuid_equal(&d->dd_uuid, &mp->m_sb.sb_meta_uuid))
207 xfs_dquot_buf_verify(
208 struct xfs_mount *mp,
212 struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
218 * if we are in log recovery, the quota subsystem has not been
219 * initialised so we have no quotainfo structure. In that case, we need
220 * to manually calculate the number of dquots in the buffer.
223 ndquots = mp->m_quotainfo->qi_dqperchunk;
225 ndquots = xfs_calc_dquots_per_chunk(bp->b_length);
228 * On the first read of the buffer, verify that each dquot is valid.
229 * We don't know what the id of the dquot is supposed to be, just that
230 * they should be increasing monotonically within the buffer. If the
231 * first id is corrupt, then it will fail on the second dquot in the
232 * buffer so corruptions could point to the wrong dquot in this case.
234 for (i = 0; i < ndquots; i++) {
235 struct xfs_disk_dquot *ddq;
238 ddq = &d[i].dd_diskdq;
241 id = be32_to_cpu(ddq->d_id);
243 error = xfs_dqcheck(mp, ddq, id + i, 0, warn, __func__);
251 xfs_dquot_buf_read_verify(
254 struct xfs_mount *mp = bp->b_target->bt_mount;
256 if (!xfs_dquot_buf_verify_crc(mp, bp))
257 xfs_buf_ioerror(bp, -EFSBADCRC);
258 else if (!xfs_dquot_buf_verify(mp, bp, XFS_QMOPT_DOWARN))
259 xfs_buf_ioerror(bp, -EFSCORRUPTED);
262 xfs_verifier_error(bp);
266 * readahead errors are silent and simply leave the buffer as !done so a real
267 * read will then be run with the xfs_dquot_buf_ops verifier. See
268 * xfs_inode_buf_verify() for why we use EIO and ~XBF_DONE here rather than
269 * reporting the failure.
272 xfs_dquot_buf_readahead_verify(
275 struct xfs_mount *mp = bp->b_target->bt_mount;
277 if (!xfs_dquot_buf_verify_crc(mp, bp) ||
278 !xfs_dquot_buf_verify(mp, bp, 0)) {
279 xfs_buf_ioerror(bp, -EIO);
280 bp->b_flags &= ~XBF_DONE;
285 * we don't calculate the CRC here as that is done when the dquot is flushed to
286 * the buffer after the update is done. This ensures that the dquot in the
287 * buffer always has an up-to-date CRC value.
290 xfs_dquot_buf_write_verify(
293 struct xfs_mount *mp = bp->b_target->bt_mount;
295 if (!xfs_dquot_buf_verify(mp, bp, XFS_QMOPT_DOWARN)) {
296 xfs_buf_ioerror(bp, -EFSCORRUPTED);
297 xfs_verifier_error(bp);
302 const struct xfs_buf_ops xfs_dquot_buf_ops = {
304 .verify_read = xfs_dquot_buf_read_verify,
305 .verify_write = xfs_dquot_buf_write_verify,
308 const struct xfs_buf_ops xfs_dquot_buf_ra_ops = {
309 .name = "xfs_dquot_ra",
310 .verify_read = xfs_dquot_buf_readahead_verify,
311 .verify_write = xfs_dquot_buf_write_verify,