const: make struct super_block::s_qcop const
[linux-2.6.git] / fs / xfs / linux-2.6 / xfs_quotaops.c
1 /*
2  * Copyright (c) 2008, Christoph Hellwig
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_dmapi.h"
20 #include "xfs_sb.h"
21 #include "xfs_inum.h"
22 #include "xfs_ag.h"
23 #include "xfs_mount.h"
24 #include "xfs_quota.h"
25 #include "xfs_log.h"
26 #include "xfs_trans.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_inode.h"
29 #include "quota/xfs_qm.h"
30 #include <linux/quota.h>
31
32
33 STATIC int
34 xfs_quota_type(int type)
35 {
36         switch (type) {
37         case USRQUOTA:
38                 return XFS_DQ_USER;
39         case GRPQUOTA:
40                 return XFS_DQ_GROUP;
41         default:
42                 return XFS_DQ_PROJ;
43         }
44 }
45
46 STATIC int
47 xfs_fs_quota_sync(
48         struct super_block      *sb,
49         int                     type)
50 {
51         struct xfs_mount        *mp = XFS_M(sb);
52
53         if (sb->s_flags & MS_RDONLY)
54                 return -EROFS;
55         if (!XFS_IS_QUOTA_RUNNING(mp))
56                 return -ENOSYS;
57         return -xfs_sync_data(mp, 0);
58 }
59
60 STATIC int
61 xfs_fs_get_xstate(
62         struct super_block      *sb,
63         struct fs_quota_stat    *fqs)
64 {
65         struct xfs_mount        *mp = XFS_M(sb);
66
67         if (!XFS_IS_QUOTA_RUNNING(mp))
68                 return -ENOSYS;
69         return -xfs_qm_scall_getqstat(mp, fqs);
70 }
71
72 STATIC int
73 xfs_fs_set_xstate(
74         struct super_block      *sb,
75         unsigned int            uflags,
76         int                     op)
77 {
78         struct xfs_mount        *mp = XFS_M(sb);
79         unsigned int            flags = 0;
80
81         if (sb->s_flags & MS_RDONLY)
82                 return -EROFS;
83         if (!XFS_IS_QUOTA_RUNNING(mp))
84                 return -ENOSYS;
85         if (!capable(CAP_SYS_ADMIN))
86                 return -EPERM;
87
88         if (uflags & XFS_QUOTA_UDQ_ACCT)
89                 flags |= XFS_UQUOTA_ACCT;
90         if (uflags & XFS_QUOTA_PDQ_ACCT)
91                 flags |= XFS_PQUOTA_ACCT;
92         if (uflags & XFS_QUOTA_GDQ_ACCT)
93                 flags |= XFS_GQUOTA_ACCT;
94         if (uflags & XFS_QUOTA_UDQ_ENFD)
95                 flags |= XFS_UQUOTA_ENFD;
96         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
97                 flags |= XFS_OQUOTA_ENFD;
98
99         switch (op) {
100         case Q_XQUOTAON:
101                 return -xfs_qm_scall_quotaon(mp, flags);
102         case Q_XQUOTAOFF:
103                 if (!XFS_IS_QUOTA_ON(mp))
104                         return -EINVAL;
105                 return -xfs_qm_scall_quotaoff(mp, flags);
106         case Q_XQUOTARM:
107                 if (XFS_IS_QUOTA_ON(mp))
108                         return -EINVAL;
109                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
110         }
111
112         return -EINVAL;
113 }
114
115 STATIC int
116 xfs_fs_get_xquota(
117         struct super_block      *sb,
118         int                     type,
119         qid_t                   id,
120         struct fs_disk_quota    *fdq)
121 {
122         struct xfs_mount        *mp = XFS_M(sb);
123
124         if (!XFS_IS_QUOTA_RUNNING(mp))
125                 return -ENOSYS;
126         if (!XFS_IS_QUOTA_ON(mp))
127                 return -ESRCH;
128
129         return -xfs_qm_scall_getquota(mp, id, xfs_quota_type(type), fdq);
130 }
131
132 STATIC int
133 xfs_fs_set_xquota(
134         struct super_block      *sb,
135         int                     type,
136         qid_t                   id,
137         struct fs_disk_quota    *fdq)
138 {
139         struct xfs_mount        *mp = XFS_M(sb);
140
141         if (sb->s_flags & MS_RDONLY)
142                 return -EROFS;
143         if (!XFS_IS_QUOTA_RUNNING(mp))
144                 return -ENOSYS;
145         if (!XFS_IS_QUOTA_ON(mp))
146                 return -ESRCH;
147         if (!capable(CAP_SYS_ADMIN))
148                 return -EPERM;
149
150         return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
151 }
152
153 const struct quotactl_ops xfs_quotactl_operations = {
154         .quota_sync             = xfs_fs_quota_sync,
155         .get_xstate             = xfs_fs_get_xstate,
156         .set_xstate             = xfs_fs_set_xstate,
157         .get_xquota             = xfs_fs_get_xquota,
158         .set_xquota             = xfs_fs_set_xquota,
159 };