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
22 * XXX: kernel implementation causes ndquots calc to go real
23 * bad. Just leaving the existing userspace calc here right now.
26 xfs_calc_dquots_per_chunk(
27 unsigned int nbblks
) /* basic block units */
31 return BBTOB(nbblks
) / sizeof(xfs_dqblk_t
);
33 #if 0 /* kernel code that goes wrong in userspace! */
37 ndquots
= BBTOB(nbblks
);
38 do_div(ndquots
, sizeof(xfs_dqblk_t
));
45 * Do some primitive error checking on ondisk dquot data structures.
50 xfs_disk_dquot_t
*ddq
,
52 uint type
, /* used only when IO_dorepair is true */
56 xfs_dqblk_t
*d
= (xfs_dqblk_t
*)ddq
;
60 * We can encounter an uninitialized dquot buffer for 2 reasons:
61 * 1. If we crash while deleting the quotainode(s), and those blks got
62 * used for user data. This is because we take the path of regular
63 * file deletion; however, the size field of quotainodes is never
64 * updated, so all the tricks that we play in itruncate_finish
67 * 2. We don't play the quota buffers when there's a quotaoff logitem.
68 * But the allocation will be replayed so we'll end up with an
69 * uninitialized quota block.
71 * This is all fine; things are still consistent, and we haven't lost
72 * any quota information. Just don't complain about bad dquot blks.
74 if (ddq
->d_magic
!= cpu_to_be16(XFS_DQUOT_MAGIC
)) {
75 if (flags
& XFS_QMOPT_DOWARN
)
77 "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x",
78 str
, id
, be16_to_cpu(ddq
->d_magic
), XFS_DQUOT_MAGIC
);
81 if (ddq
->d_version
!= XFS_DQUOT_VERSION
) {
82 if (flags
& XFS_QMOPT_DOWARN
)
84 "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x",
85 str
, id
, ddq
->d_version
, XFS_DQUOT_VERSION
);
89 if (ddq
->d_flags
!= XFS_DQ_USER
&&
90 ddq
->d_flags
!= XFS_DQ_PROJ
&&
91 ddq
->d_flags
!= XFS_DQ_GROUP
) {
92 if (flags
& XFS_QMOPT_DOWARN
)
94 "%s : XFS dquot ID 0x%x, unknown flags 0x%x",
95 str
, id
, ddq
->d_flags
);
99 if (id
!= -1 && id
!= be32_to_cpu(ddq
->d_id
)) {
100 if (flags
& XFS_QMOPT_DOWARN
)
102 "%s : ondisk-dquot 0x%p, ID mismatch: "
103 "0x%x expected, found id 0x%x",
104 str
, ddq
, id
, be32_to_cpu(ddq
->d_id
));
108 if (!errs
&& ddq
->d_id
) {
109 if (ddq
->d_blk_softlimit
&&
110 be64_to_cpu(ddq
->d_bcount
) >
111 be64_to_cpu(ddq
->d_blk_softlimit
)) {
112 if (!ddq
->d_btimer
) {
113 if (flags
& XFS_QMOPT_DOWARN
)
115 "%s : Dquot ID 0x%x (0x%p) BLK TIMER NOT STARTED",
116 str
, (int)be32_to_cpu(ddq
->d_id
), ddq
);
120 if (ddq
->d_ino_softlimit
&&
121 be64_to_cpu(ddq
->d_icount
) >
122 be64_to_cpu(ddq
->d_ino_softlimit
)) {
123 if (!ddq
->d_itimer
) {
124 if (flags
& XFS_QMOPT_DOWARN
)
126 "%s : Dquot ID 0x%x (0x%p) INODE TIMER NOT STARTED",
127 str
, (int)be32_to_cpu(ddq
->d_id
), ddq
);
131 if (ddq
->d_rtb_softlimit
&&
132 be64_to_cpu(ddq
->d_rtbcount
) >
133 be64_to_cpu(ddq
->d_rtb_softlimit
)) {
134 if (!ddq
->d_rtbtimer
) {
135 if (flags
& XFS_QMOPT_DOWARN
)
137 "%s : Dquot ID 0x%x (0x%p) RTBLK TIMER NOT STARTED",
138 str
, (int)be32_to_cpu(ddq
->d_id
), ddq
);
144 if (!errs
|| !(flags
& XFS_QMOPT_DQREPAIR
))
147 if (flags
& XFS_QMOPT_DOWARN
)
148 xfs_notice(mp
, "Re-initializing dquot ID 0x%x", id
);
151 * Typically, a repair is only requested by quotacheck.
154 ASSERT(flags
& XFS_QMOPT_DQREPAIR
);
155 memset(d
, 0, sizeof(xfs_dqblk_t
));
157 d
->dd_diskdq
.d_magic
= cpu_to_be16(XFS_DQUOT_MAGIC
);
158 d
->dd_diskdq
.d_version
= XFS_DQUOT_VERSION
;
159 d
->dd_diskdq
.d_flags
= type
;
160 d
->dd_diskdq
.d_id
= cpu_to_be32(id
);
162 if (xfs_sb_version_hascrc(&mp
->m_sb
)) {
163 uuid_copy(&d
->dd_uuid
, &mp
->m_sb
.sb_uuid
);
164 xfs_update_cksum((char *)d
, sizeof(struct xfs_dqblk
),
172 xfs_dquot_buf_verify_crc(
173 struct xfs_mount
*mp
,
176 struct xfs_dqblk
*d
= (struct xfs_dqblk
*)bp
->b_addr
;
180 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
184 * if we are in log recovery, the quota subsystem has not been
185 * initialised so we have no quotainfo structure. In that case, we need
186 * to manually calculate the number of dquots in the buffer.
189 ndquots
= mp
->m_quotainfo
->qi_dqperchunk
;
191 ndquots
= xfs_calc_dquots_per_chunk(bp
->b_length
);
192 // XFS_BB_TO_FSB(mp, bp->b_length));
194 for (i
= 0; i
< ndquots
; i
++, d
++) {
195 if (!xfs_verify_cksum((char *)d
, sizeof(struct xfs_dqblk
),
198 if (!uuid_equal(&d
->dd_uuid
, &mp
->m_sb
.sb_uuid
))
205 xfs_dquot_buf_verify(
206 struct xfs_mount
*mp
,
209 struct xfs_dqblk
*d
= (struct xfs_dqblk
*)bp
->b_addr
;
215 * if we are in log recovery, the quota subsystem has not been
216 * initialised so we have no quotainfo structure. In that case, we need
217 * to manually calculate the number of dquots in the buffer.
220 ndquots
= mp
->m_quotainfo
->qi_dqperchunk
;
222 ndquots
= xfs_calc_dquots_per_chunk(bp
->b_length
);
225 * On the first read of the buffer, verify that each dquot is valid.
226 * We don't know what the id of the dquot is supposed to be, just that
227 * they should be increasing monotonically within the buffer. If the
228 * first id is corrupt, then it will fail on the second dquot in the
229 * buffer so corruptions could point to the wrong dquot in this case.
231 for (i
= 0; i
< ndquots
; i
++) {
232 struct xfs_disk_dquot
*ddq
;
235 ddq
= &d
[i
].dd_diskdq
;
238 id
= be32_to_cpu(ddq
->d_id
);
240 error
= xfs_dqcheck(mp
, ddq
, id
+ i
, 0, XFS_QMOPT_DOWARN
,
241 "xfs_dquot_buf_verify");
249 xfs_dquot_buf_read_verify(
252 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
254 if (!xfs_dquot_buf_verify_crc(mp
, bp
))
255 xfs_buf_ioerror(bp
, EFSBADCRC
);
256 else if (!xfs_dquot_buf_verify(mp
, bp
))
257 xfs_buf_ioerror(bp
, EFSCORRUPTED
);
260 xfs_verifier_error(bp
);
264 * we don't calculate the CRC here as that is done when the dquot is flushed to
265 * the buffer after the update is done. This ensures that the dquot in the
266 * buffer always has an up-to-date CRC value.
269 xfs_dquot_buf_write_verify(
272 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
274 if (!xfs_dquot_buf_verify(mp
, bp
)) {
275 xfs_buf_ioerror(bp
, EFSCORRUPTED
);
276 xfs_verifier_error(bp
);
281 const struct xfs_buf_ops xfs_dquot_buf_ops
= {
282 .verify_read
= xfs_dquot_buf_read_verify
,
283 .verify_write
= xfs_dquot_buf_write_verify
,