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1/*
2 * Copyright (c) 2000-2006 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_log.h"
21#include "xfs_trans.h"
22#include "xfs_sb.h"
23#include "xfs_ag.h"
24#include "xfs_alloc.h"
25#include "xfs_quota.h"
26#include "xfs_mount.h"
27#include "xfs_bmap_btree.h"
28#include "xfs_inode.h"
29#include "xfs_itable.h"
30#include "xfs_bmap.h"
31#include "xfs_rtalloc.h"
32#include "xfs_error.h"
33#include "xfs_attr.h"
34#include "xfs_buf_item.h"
35#include "xfs_qm.h"
36
37
38STATIC void
39xfs_fill_statvfs_from_dquot(
40 struct kstatfs *statp,
41 struct xfs_dquot *dqp)
42{
43 __uint64_t limit;
44
45 limit = dqp->q_core.d_blk_softlimit ?
46 be64_to_cpu(dqp->q_core.d_blk_softlimit) :
47 be64_to_cpu(dqp->q_core.d_blk_hardlimit);
48 if (limit && statp->f_blocks > limit) {
49 statp->f_blocks = limit;
50 statp->f_bfree = statp->f_bavail =
51 (statp->f_blocks > dqp->q_res_bcount) ?
52 (statp->f_blocks - dqp->q_res_bcount) : 0;
53 }
54
55 limit = dqp->q_core.d_ino_softlimit ?
56 be64_to_cpu(dqp->q_core.d_ino_softlimit) :
57 be64_to_cpu(dqp->q_core.d_ino_hardlimit);
58 if (limit && statp->f_files > limit) {
59 statp->f_files = limit;
60 statp->f_ffree =
61 (statp->f_files > dqp->q_res_icount) ?
62 (statp->f_ffree - dqp->q_res_icount) : 0;
63 }
64}
65
66
67/*
68 * Directory tree accounting is implemented using project quotas, where
69 * the project identifier is inherited from parent directories.
70 * A statvfs (df, etc.) of a directory that is using project quota should
71 * return a statvfs of the project, not the entire filesystem.
72 * This makes such trees appear as if they are filesystems in themselves.
73 */
74void
75xfs_qm_statvfs(
76 xfs_inode_t *ip,
77 struct kstatfs *statp)
78{
79 xfs_mount_t *mp = ip->i_mount;
80 xfs_dquot_t *dqp;
81
82 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
83 xfs_fill_statvfs_from_dquot(statp, dqp);
84 xfs_qm_dqput(dqp);
85 }
86}
87
88int
89xfs_qm_newmount(
90 xfs_mount_t *mp,
91 uint *needquotamount,
92 uint *quotaflags)
93{
94 uint quotaondisk;
95 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
96
97 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
98 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
99
100 if (quotaondisk) {
101 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
102 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
103 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
104 }
105
106 /*
107 * If the device itself is read-only, we can't allow
108 * the user to change the state of quota on the mount -
109 * this would generate a transaction on the ro device,
110 * which would lead to an I/O error and shutdown
111 */
112
113 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
114 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
115 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
116 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
117 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
118 (!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
119 xfs_dev_is_read_only(mp, "changing quota state")) {
120 xfs_warn(mp, "please mount with%s%s%s%s.",
121 (!quotaondisk ? "out quota" : ""),
122 (uquotaondisk ? " usrquota" : ""),
123 (pquotaondisk ? " prjquota" : ""),
124 (gquotaondisk ? " grpquota" : ""));
125 return XFS_ERROR(EPERM);
126 }
127
128 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
129 /*
130 * Call mount_quotas at this point only if we won't have to do
131 * a quotacheck.
132 */
133 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
134 /*
135 * If an error occurred, qm_mount_quotas code
136 * has already disabled quotas. So, just finish
137 * mounting, and get on with the boring life
138 * without disk quotas.
139 */
140 xfs_qm_mount_quotas(mp);
141 } else {
142 /*
143 * Clear the quota flags, but remember them. This
144 * is so that the quota code doesn't get invoked
145 * before we're ready. This can happen when an
146 * inode goes inactive and wants to free blocks,
147 * or via xfs_log_mount_finish.
148 */
149 *needquotamount = B_TRUE;
150 *quotaflags = mp->m_qflags;
151 mp->m_qflags = 0;
152 }
153 }
154
155 return 0;
156}
1/*
2 * Copyright (c) 2000-2006 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_bit.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_alloc.h"
27#include "xfs_quota.h"
28#include "xfs_mount.h"
29#include "xfs_bmap_btree.h"
30#include "xfs_inode.h"
31#include "xfs_itable.h"
32#include "xfs_bmap.h"
33#include "xfs_rtalloc.h"
34#include "xfs_error.h"
35#include "xfs_attr.h"
36#include "xfs_buf_item.h"
37#include "xfs_qm.h"
38
39
40STATIC void
41xfs_fill_statvfs_from_dquot(
42 struct kstatfs *statp,
43 xfs_disk_dquot_t *dp)
44{
45 __uint64_t limit;
46
47 limit = dp->d_blk_softlimit ?
48 be64_to_cpu(dp->d_blk_softlimit) :
49 be64_to_cpu(dp->d_blk_hardlimit);
50 if (limit && statp->f_blocks > limit) {
51 statp->f_blocks = limit;
52 statp->f_bfree = statp->f_bavail =
53 (statp->f_blocks > be64_to_cpu(dp->d_bcount)) ?
54 (statp->f_blocks - be64_to_cpu(dp->d_bcount)) : 0;
55 }
56
57 limit = dp->d_ino_softlimit ?
58 be64_to_cpu(dp->d_ino_softlimit) :
59 be64_to_cpu(dp->d_ino_hardlimit);
60 if (limit && statp->f_files > limit) {
61 statp->f_files = limit;
62 statp->f_ffree =
63 (statp->f_files > be64_to_cpu(dp->d_icount)) ?
64 (statp->f_ffree - be64_to_cpu(dp->d_icount)) : 0;
65 }
66}
67
68
69/*
70 * Directory tree accounting is implemented using project quotas, where
71 * the project identifier is inherited from parent directories.
72 * A statvfs (df, etc.) of a directory that is using project quota should
73 * return a statvfs of the project, not the entire filesystem.
74 * This makes such trees appear as if they are filesystems in themselves.
75 */
76void
77xfs_qm_statvfs(
78 xfs_inode_t *ip,
79 struct kstatfs *statp)
80{
81 xfs_mount_t *mp = ip->i_mount;
82 xfs_dquot_t *dqp;
83
84 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
85 xfs_fill_statvfs_from_dquot(statp, &dqp->q_core);
86 xfs_qm_dqput(dqp);
87 }
88}
89
90int
91xfs_qm_newmount(
92 xfs_mount_t *mp,
93 uint *needquotamount,
94 uint *quotaflags)
95{
96 uint quotaondisk;
97 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
98
99 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
100 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
101
102 if (quotaondisk) {
103 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
104 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
105 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
106 }
107
108 /*
109 * If the device itself is read-only, we can't allow
110 * the user to change the state of quota on the mount -
111 * this would generate a transaction on the ro device,
112 * which would lead to an I/O error and shutdown
113 */
114
115 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
116 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
117 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
118 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
119 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
120 (!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
121 xfs_dev_is_read_only(mp, "changing quota state")) {
122 xfs_warn(mp, "please mount with%s%s%s%s.",
123 (!quotaondisk ? "out quota" : ""),
124 (uquotaondisk ? " usrquota" : ""),
125 (pquotaondisk ? " prjquota" : ""),
126 (gquotaondisk ? " grpquota" : ""));
127 return XFS_ERROR(EPERM);
128 }
129
130 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
131 /*
132 * Call mount_quotas at this point only if we won't have to do
133 * a quotacheck.
134 */
135 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
136 /*
137 * If an error occurred, qm_mount_quotas code
138 * has already disabled quotas. So, just finish
139 * mounting, and get on with the boring life
140 * without disk quotas.
141 */
142 xfs_qm_mount_quotas(mp);
143 } else {
144 /*
145 * Clear the quota flags, but remember them. This
146 * is so that the quota code doesn't get invoked
147 * before we're ready. This can happen when an
148 * inode goes inactive and wants to free blocks,
149 * or via xfs_log_mount_finish.
150 */
151 *needquotamount = B_TRUE;
152 *quotaflags = mp->m_qflags;
153 mp->m_qflags = 0;
154 }
155 }
156
157 return 0;
158}
159
160void __init
161xfs_qm_init(void)
162{
163 printk(KERN_INFO "SGI XFS Quota Management subsystem\n");
164 mutex_init(&xfs_Gqm_lock);
165 xfs_qm_init_procfs();
166}
167
168void __exit
169xfs_qm_exit(void)
170{
171 xfs_qm_cleanup_procfs();
172 if (qm_dqzone)
173 kmem_zone_destroy(qm_dqzone);
174 if (qm_dqtrxzone)
175 kmem_zone_destroy(qm_dqtrxzone);
176}