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[FreeBSD/releng/9.2.git] / sys / gnu / fs / xfs / xfs_qmops.c
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_dir.h"
27 #include "xfs_dir2.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_quota.h"
31 #include "xfs_error.h"
32
33 STATIC struct xfs_dquot *
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
47 xfs_mount_reset_sbqflags(xfs_mount_t *mp)
48 {
49         int                     error;
50         xfs_trans_t             *tp;
51         unsigned long           s;
52
53         mp->m_qflags = 0;
54         /*
55          * It is OK to look at sb_qflags here in mount path,
56          * without SB_LOCK.
57          */
58         if (mp->m_sb.sb_qflags == 0)
59                 return 0;
60         s = XFS_SB_LOCK(mp);
61         mp->m_sb.sb_qflags = 0;
62         XFS_SB_UNLOCK(mp, s);
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 (XFS_MTOVFS(mp)->vfs_flag & VFS_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, NULL);
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 xfs_qmops_t     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 };