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
32
33 STATIC struct xfs_dquot *
xfs_dqvopchown_default(struct xfs_trans * tp,struct xfs_inode * ip,struct xfs_dquot ** dqp,struct xfs_dquot * dq)34 xfs_dqvopchown_default(
35 struct xfs_trans *tp,
36 struct xfs_inode *ip,
37 struct xfs_dquot **dqp,
38 struct xfs_dquot *dq)
39 {
40 return NULL;
41 }
42
43 /*
44 * Clear the quotaflags in memory and in the superblock.
45 */
46 int
xfs_mount_reset_sbqflags(xfs_mount_t * mp)47 xfs_mount_reset_sbqflags(xfs_mount_t *mp)
48 {
49 int error;
50 xfs_trans_t *tp;
51
52 mp->m_qflags = 0;
53 /*
54 * It is OK to look at sb_qflags here in mount path,
55 * without m_sb_lock.
56 */
57 if (mp->m_sb.sb_qflags == 0)
58 return 0;
59 spin_lock(&mp->m_sb_lock);
60 mp->m_sb.sb_qflags = 0;
61 spin_unlock(&mp->m_sb_lock);
62
63 /*
64 * if the fs is readonly, let the incore superblock run
65 * with quotas off but don't flush the update out to disk
66 */
67 if (mp->m_flags & XFS_MOUNT_RDONLY)
68 return 0;
69 #ifdef QUOTADEBUG
70 xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
71 #endif
72 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
73 if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
74 XFS_DEFAULT_LOG_COUNT))) {
75 xfs_trans_cancel(tp, 0);
76 xfs_fs_cmn_err(CE_ALERT, mp,
77 "xfs_mount_reset_sbqflags: Superblock update failed!");
78 return error;
79 }
80 xfs_mod_sb(tp, XFS_SB_QFLAGS);
81 error = xfs_trans_commit(tp, 0);
82 return error;
83 }
84
85 STATIC int
xfs_noquota_init(xfs_mount_t * mp,uint * needquotamount,uint * quotaflags)86 xfs_noquota_init(
87 xfs_mount_t *mp,
88 uint *needquotamount,
89 uint *quotaflags)
90 {
91 int error = 0;
92
93 *quotaflags = 0;
94 *needquotamount = B_FALSE;
95
96 ASSERT(!XFS_IS_QUOTA_ON(mp));
97
98 /*
99 * If a file system had quotas running earlier, but decided to
100 * mount without -o uquota/pquota/gquota options, revoke the
101 * quotachecked license.
102 */
103 if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
104 cmn_err(CE_NOTE,
105 "XFS resetting qflags for filesystem %s",
106 mp->m_fsname);
107
108 error = xfs_mount_reset_sbqflags(mp);
109 }
110 return error;
111 }
112
113 static struct xfs_qmops xfs_qmcore_stub = {
114 .xfs_qminit = (xfs_qminit_t) xfs_noquota_init,
115 .xfs_qmdone = (xfs_qmdone_t) fs_noerr,
116 .xfs_qmmount = (xfs_qmmount_t) fs_noerr,
117 .xfs_qmunmount = (xfs_qmunmount_t) fs_noerr,
118 .xfs_dqrele = (xfs_dqrele_t) fs_noerr,
119 .xfs_dqattach = (xfs_dqattach_t) fs_noerr,
120 .xfs_dqdetach = (xfs_dqdetach_t) fs_noerr,
121 .xfs_dqpurgeall = (xfs_dqpurgeall_t) fs_noerr,
122 .xfs_dqvopalloc = (xfs_dqvopalloc_t) fs_noerr,
123 .xfs_dqvopcreate = (xfs_dqvopcreate_t) fs_noerr,
124 .xfs_dqvoprename = (xfs_dqvoprename_t) fs_noerr,
125 .xfs_dqvopchown = xfs_dqvopchown_default,
126 .xfs_dqvopchownresv = (xfs_dqvopchownresv_t) fs_noerr,
127 .xfs_dqstatvfs = (xfs_dqstatvfs_t) fs_noval,
128 .xfs_dqsync = (xfs_dqsync_t) fs_noerr,
129 .xfs_quotactl = (xfs_quotactl_t) fs_nosys,
130 };
131
132 int
xfs_qmops_get(struct xfs_mount * mp)133 xfs_qmops_get(struct xfs_mount *mp)
134 {
135 if (XFS_IS_QUOTA_RUNNING(mp)) {
136 #ifdef CONFIG_XFS_QUOTA
137 mp->m_qm_ops = &xfs_qmcore_xfs;
138 #else
139 cmn_err(CE_WARN,
140 "XFS: qouta support not available in this kernel.");
141 return EINVAL;
142 #endif
143 } else {
144 mp->m_qm_ops = &xfs_qmcore_stub;
145 }
146
147 return 0;
148 }
149
150 void
xfs_qmops_put(struct xfs_mount * mp)151 xfs_qmops_put(struct xfs_mount *mp)
152 {
153 }
154