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