1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_quota.h"
15#include "xfs_trans.h"
16#include "xfs_buf_item.h"
17#include "xfs_trans_priv.h"
18#include "xfs_qm.h"
19#include "xfs_log.h"
20#include "xfs_log_priv.h"
21#include "xfs_log_recover.h"
22
23STATIC void
24xlog_recover_dquot_ra_pass2(
25	struct xlog			*log,
26	struct xlog_recover_item	*item)
27{
28	struct xfs_mount	*mp = log->l_mp;
29	struct xfs_disk_dquot	*recddq;
30	struct xfs_dq_logformat	*dq_f;
31	uint			type;
32
33	if (mp->m_qflags == 0)
34		return;
35
36	recddq = item->ri_buf[1].i_addr;
37	if (recddq == NULL)
38		return;
39	if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot))
40		return;
41
42	type = recddq->d_type & XFS_DQTYPE_REC_MASK;
43	ASSERT(type);
44	if (log->l_quotaoffs_flag & type)
45		return;
46
47	dq_f = item->ri_buf[0].i_addr;
48	ASSERT(dq_f);
49	ASSERT(dq_f->qlf_len == 1);
50
51	xlog_buf_readahead(log, dq_f->qlf_blkno,
52			XFS_FSB_TO_BB(mp, dq_f->qlf_len),
53			&xfs_dquot_buf_ra_ops);
54}
55
56/*
57 * Recover a dquot record
58 */
59STATIC int
60xlog_recover_dquot_commit_pass2(
61	struct xlog			*log,
62	struct list_head		*buffer_list,
63	struct xlog_recover_item	*item,
64	xfs_lsn_t			current_lsn)
65{
66	struct xfs_mount		*mp = log->l_mp;
67	struct xfs_buf			*bp;
68	struct xfs_disk_dquot		*ddq, *recddq;
69	struct xfs_dq_logformat		*dq_f;
70	xfs_failaddr_t			fa;
71	int				error;
72	uint				type;
73
74	/*
75	 * Filesystems are required to send in quota flags at mount time.
76	 */
77	if (mp->m_qflags == 0)
78		return 0;
79
80	recddq = item->ri_buf[1].i_addr;
81	if (recddq == NULL) {
82		xfs_alert(log->l_mp, "NULL dquot in %s.", __func__);
83		return -EFSCORRUPTED;
84	}
85	if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot)) {
86		xfs_alert(log->l_mp, "dquot too small (%d) in %s.",
87			item->ri_buf[1].i_len, __func__);
88		return -EFSCORRUPTED;
89	}
90
91	/*
92	 * This type of quotas was turned off, so ignore this record.
93	 */
94	type = recddq->d_type & XFS_DQTYPE_REC_MASK;
95	ASSERT(type);
96	if (log->l_quotaoffs_flag & type)
97		return 0;
98
99	/*
100	 * At this point we know that quota was _not_ turned off.
101	 * Since the mount flags are not indicating to us otherwise, this
102	 * must mean that quota is on, and the dquot needs to be replayed.
103	 * Remember that we may not have fully recovered the superblock yet,
104	 * so we can't do the usual trick of looking at the SB quota bits.
105	 *
106	 * The other possibility, of course, is that the quota subsystem was
107	 * removed since the last mount - ENOSYS.
108	 */
109	dq_f = item->ri_buf[0].i_addr;
110	ASSERT(dq_f);
111	fa = xfs_dquot_verify(mp, recddq, dq_f->qlf_id);
112	if (fa) {
113		xfs_alert(mp, "corrupt dquot ID 0x%x in log at %pS",
114				dq_f->qlf_id, fa);
115		return -EFSCORRUPTED;
116	}
117	ASSERT(dq_f->qlf_len == 1);
118
119	/*
120	 * At this point we are assuming that the dquots have been allocated
121	 * and hence the buffer has valid dquots stamped in it. It should,
122	 * therefore, pass verifier validation. If the dquot is bad, then the
123	 * we'll return an error here, so we don't need to specifically check
124	 * the dquot in the buffer after the verifier has run.
125	 */
126	error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno,
127				   XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp,
128				   &xfs_dquot_buf_ops);
129	if (error)
130		return error;
131
132	ASSERT(bp);
133	ddq = xfs_buf_offset(bp, dq_f->qlf_boffset);
134
135	/*
136	 * If the dquot has an LSN in it, recover the dquot only if it's less
137	 * than the lsn of the transaction we are replaying.
138	 */
139	if (xfs_has_crc(mp)) {
140		struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddq;
141		xfs_lsn_t	lsn = be64_to_cpu(dqb->dd_lsn);
142
143		if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) {
144			goto out_release;
145		}
146	}
147
148	memcpy(ddq, recddq, item->ri_buf[1].i_len);
149	if (xfs_has_crc(mp)) {
150		xfs_update_cksum((char *)ddq, sizeof(struct xfs_dqblk),
151				 XFS_DQUOT_CRC_OFF);
152	}
153
154	ASSERT(dq_f->qlf_size == 2);
155	ASSERT(bp->b_mount == mp);
156	bp->b_flags |= _XBF_LOGRECOVERY;
157	xfs_buf_delwri_queue(bp, buffer_list);
158
159out_release:
160	xfs_buf_relse(bp);
161	return 0;
162}
163
164const struct xlog_recover_item_ops xlog_dquot_item_ops = {
165	.item_type		= XFS_LI_DQUOT,
166	.ra_pass2		= xlog_recover_dquot_ra_pass2,
167	.commit_pass2		= xlog_recover_dquot_commit_pass2,
168};
169
170/*
171 * Recover QUOTAOFF records. We simply make a note of it in the xlog
172 * structure, so that we know not to do any dquot item or dquot buffer recovery,
173 * of that type.
174 */
175STATIC int
176xlog_recover_quotaoff_commit_pass1(
177	struct xlog			*log,
178	struct xlog_recover_item	*item)
179{
180	struct xfs_qoff_logformat	*qoff_f = item->ri_buf[0].i_addr;
181	ASSERT(qoff_f);
182
183	/*
184	 * The logitem format's flag tells us if this was user quotaoff,
185	 * group/project quotaoff or both.
186	 */
187	if (qoff_f->qf_flags & XFS_UQUOTA_ACCT)
188		log->l_quotaoffs_flag |= XFS_DQTYPE_USER;
189	if (qoff_f->qf_flags & XFS_PQUOTA_ACCT)
190		log->l_quotaoffs_flag |= XFS_DQTYPE_PROJ;
191	if (qoff_f->qf_flags & XFS_GQUOTA_ACCT)
192		log->l_quotaoffs_flag |= XFS_DQTYPE_GROUP;
193
194	return 0;
195}
196
197const struct xlog_recover_item_ops xlog_quotaoff_item_ops = {
198	.item_type		= XFS_LI_QUOTAOFF,
199	.commit_pass1		= xlog_recover_quotaoff_commit_pass1,
200	/* nothing to commit in pass2 */
201};
202