1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir2.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_mount.h"
29 #include "xfs_quota.h"
30 #include "xfs_error.h"
31 #include "xfs_clnt.h"
32
33
34 STATIC struct xfs_dquot *
35 xfs_dqvopchown_default(
36 struct xfs_trans *tp,
37 struct xfs_inode *ip,
38 struct xfs_dquot **dqp,
39 struct xfs_dquot *dq)
40 {
41 return NULL;
42 }
43
44 /*
45 * Clear the quotaflags in memory and in the superblock.
46 */
47 int
48 xfs_mount_reset_sbqflags(xfs_mount_t *mp)
49 {
50 int error;
51 xfs_trans_t *tp;
52
53 mp->m_qflags = 0;
54 /*
55 * It is OK to look at sb_qflags here in mount path,
56 * without m_sb_lock.
57 */
58 if (mp->m_sb.sb_qflags == 0)
59 return 0;
60 spin_lock(&mp->m_sb_lock);
61 mp->m_sb.sb_qflags = 0;
62 spin_unlock(&mp->m_sb_lock);
63
64 /*
65 * if the fs is readonly, let the incore superblock run
66 * with quotas off but don't flush the update out to disk
67 */
68 if (mp->m_flags & XFS_MOUNT_RDONLY)
69 return 0;
70 #ifdef QUOTADEBUG
71 xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
72 #endif
73 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
74 if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
75 XFS_DEFAULT_LOG_COUNT))) {
76 xfs_trans_cancel(tp, 0);
77 xfs_fs_cmn_err(CE_ALERT, mp,
78 "xfs_mount_reset_sbqflags: Superblock update failed!");
79 return error;
80 }
81 xfs_mod_sb(tp, XFS_SB_QFLAGS);
82 error = xfs_trans_commit(tp, 0);
83 return error;
84 }
85
86 STATIC int
87 xfs_noquota_init(
88 xfs_mount_t *mp,
89 uint *needquotamount,
90 uint *quotaflags)
91 {
92 int error = 0;
93
94 *quotaflags = 0;
95 *needquotamount = B_FALSE;
96
97 ASSERT(!XFS_IS_QUOTA_ON(mp));
98
99 /*
100 * If a file system had quotas running earlier, but decided to
101 * mount without -o uquota/pquota/gquota options, revoke the
102 * quotachecked license.
103 */
104 if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
105 cmn_err(CE_NOTE,
106 "XFS resetting qflags for filesystem %s",
107 mp->m_fsname);
108
109 error = xfs_mount_reset_sbqflags(mp);
110 }
111 return error;
112 }
113
114 static struct xfs_qmops xfs_qmcore_stub = {
115 .xfs_qminit = (xfs_qminit_t) xfs_noquota_init,
116 .xfs_qmdone = (xfs_qmdone_t) fs_noerr,
117 .xfs_qmmount = (xfs_qmmount_t) fs_noerr,
118 .xfs_qmunmount = (xfs_qmunmount_t) fs_noerr,
119 .xfs_dqrele = (xfs_dqrele_t) fs_noerr,
120 .xfs_dqattach = (xfs_dqattach_t) fs_noerr,
121 .xfs_dqdetach = (xfs_dqdetach_t) fs_noerr,
122 .xfs_dqpurgeall = (xfs_dqpurgeall_t) fs_noerr,
123 .xfs_dqvopalloc = (xfs_dqvopalloc_t) fs_noerr,
124 .xfs_dqvopcreate = (xfs_dqvopcreate_t) fs_noerr,
125 .xfs_dqvoprename = (xfs_dqvoprename_t) fs_noerr,
126 .xfs_dqvopchown = xfs_dqvopchown_default,
127 .xfs_dqvopchownresv = (xfs_dqvopchownresv_t) fs_noerr,
128 .xfs_dqstatvfs = (xfs_dqstatvfs_t) fs_noval,
129 .xfs_dqsync = (xfs_dqsync_t) fs_noerr,
130 .xfs_quotactl = (xfs_quotactl_t) fs_nosys,
131 };
132
133 int
134 xfs_qmops_get(struct xfs_mount *mp, struct xfs_mount_args *args)
135 {
136 if (args->flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA)) {
137 #ifdef CONFIG_XFS_QUOTA
138 mp->m_qm_ops = &xfs_qmcore_xfs;
139 #else
140 cmn_err(CE_WARN,
141 "XFS: qouta support not available in this kernel.");
142 return EINVAL;
143 #endif
144 } else {
145 mp->m_qm_ops = &xfs_qmcore_stub;
146 }
147
148 return 0;
149 }
150
151 void
152 xfs_qmops_put(struct xfs_mount *mp)
153 {
154 }
155
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