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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_format.h"
21#include "xfs_log_format.h"
22#include "xfs_trans_resv.h"
23#include "xfs_quota.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_error.h"
27#include "xfs_trans.h"
28#include "xfs_qm.h"
29
30
31STATIC void
32xfs_fill_statvfs_from_dquot(
33 struct kstatfs *statp,
34 struct xfs_dquot *dqp)
35{
36 uint64_t limit;
37
38 limit = dqp->q_core.d_blk_softlimit ?
39 be64_to_cpu(dqp->q_core.d_blk_softlimit) :
40 be64_to_cpu(dqp->q_core.d_blk_hardlimit);
41 if (limit && statp->f_blocks > limit) {
42 statp->f_blocks = limit;
43 statp->f_bfree = statp->f_bavail =
44 (statp->f_blocks > dqp->q_res_bcount) ?
45 (statp->f_blocks - dqp->q_res_bcount) : 0;
46 }
47
48 limit = dqp->q_core.d_ino_softlimit ?
49 be64_to_cpu(dqp->q_core.d_ino_softlimit) :
50 be64_to_cpu(dqp->q_core.d_ino_hardlimit);
51 if (limit && statp->f_files > limit) {
52 statp->f_files = limit;
53 statp->f_ffree =
54 (statp->f_files > dqp->q_res_icount) ?
55 (statp->f_ffree - dqp->q_res_icount) : 0;
56 }
57}
58
59
60/*
61 * Directory tree accounting is implemented using project quotas, where
62 * the project identifier is inherited from parent directories.
63 * A statvfs (df, etc.) of a directory that is using project quota should
64 * return a statvfs of the project, not the entire filesystem.
65 * This makes such trees appear as if they are filesystems in themselves.
66 */
67void
68xfs_qm_statvfs(
69 xfs_inode_t *ip,
70 struct kstatfs *statp)
71{
72 xfs_mount_t *mp = ip->i_mount;
73 xfs_dquot_t *dqp;
74
75 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
76 xfs_fill_statvfs_from_dquot(statp, dqp);
77 xfs_qm_dqput(dqp);
78 }
79}
80
81int
82xfs_qm_newmount(
83 xfs_mount_t *mp,
84 uint *needquotamount,
85 uint *quotaflags)
86{
87 uint quotaondisk;
88 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
89
90 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
91 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
92
93 if (quotaondisk) {
94 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
95 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
96 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
97 }
98
99 /*
100 * If the device itself is read-only, we can't allow
101 * the user to change the state of quota on the mount -
102 * this would generate a transaction on the ro device,
103 * which would lead to an I/O error and shutdown
104 */
105
106 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
107 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
108 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
109 (!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) ||
110 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
111 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) &&
112 xfs_dev_is_read_only(mp, "changing quota state")) {
113 xfs_warn(mp, "please mount with%s%s%s%s.",
114 (!quotaondisk ? "out quota" : ""),
115 (uquotaondisk ? " usrquota" : ""),
116 (gquotaondisk ? " grpquota" : ""),
117 (pquotaondisk ? " prjquota" : ""));
118 return -EPERM;
119 }
120
121 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
122 /*
123 * Call mount_quotas at this point only if we won't have to do
124 * a quotacheck.
125 */
126 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
127 /*
128 * If an error occurred, qm_mount_quotas code
129 * has already disabled quotas. So, just finish
130 * mounting, and get on with the boring life
131 * without disk quotas.
132 */
133 xfs_qm_mount_quotas(mp);
134 } else {
135 /*
136 * Clear the quota flags, but remember them. This
137 * is so that the quota code doesn't get invoked
138 * before we're ready. This can happen when an
139 * inode goes inactive and wants to free blocks,
140 * or via xfs_log_mount_finish.
141 */
142 *needquotamount = true;
143 *quotaflags = mp->m_qflags;
144 mp->m_qflags = 0;
145 }
146 }
147
148 return 0;
149}
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_format.h"
21#include "xfs_log_format.h"
22#include "xfs_trans_resv.h"
23#include "xfs_sb.h"
24#include "xfs_ag.h"
25#include "xfs_quota.h"
26#include "xfs_mount.h"
27#include "xfs_inode.h"
28#include "xfs_error.h"
29#include "xfs_trans.h"
30#include "xfs_qm.h"
31
32
33STATIC void
34xfs_fill_statvfs_from_dquot(
35 struct kstatfs *statp,
36 struct xfs_dquot *dqp)
37{
38 __uint64_t limit;
39
40 limit = dqp->q_core.d_blk_softlimit ?
41 be64_to_cpu(dqp->q_core.d_blk_softlimit) :
42 be64_to_cpu(dqp->q_core.d_blk_hardlimit);
43 if (limit && statp->f_blocks > limit) {
44 statp->f_blocks = limit;
45 statp->f_bfree = statp->f_bavail =
46 (statp->f_blocks > dqp->q_res_bcount) ?
47 (statp->f_blocks - dqp->q_res_bcount) : 0;
48 }
49
50 limit = dqp->q_core.d_ino_softlimit ?
51 be64_to_cpu(dqp->q_core.d_ino_softlimit) :
52 be64_to_cpu(dqp->q_core.d_ino_hardlimit);
53 if (limit && statp->f_files > limit) {
54 statp->f_files = limit;
55 statp->f_ffree =
56 (statp->f_files > dqp->q_res_icount) ?
57 (statp->f_ffree - dqp->q_res_icount) : 0;
58 }
59}
60
61
62/*
63 * Directory tree accounting is implemented using project quotas, where
64 * the project identifier is inherited from parent directories.
65 * A statvfs (df, etc.) of a directory that is using project quota should
66 * return a statvfs of the project, not the entire filesystem.
67 * This makes such trees appear as if they are filesystems in themselves.
68 */
69void
70xfs_qm_statvfs(
71 xfs_inode_t *ip,
72 struct kstatfs *statp)
73{
74 xfs_mount_t *mp = ip->i_mount;
75 xfs_dquot_t *dqp;
76
77 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
78 xfs_fill_statvfs_from_dquot(statp, dqp);
79 xfs_qm_dqput(dqp);
80 }
81}
82
83int
84xfs_qm_newmount(
85 xfs_mount_t *mp,
86 uint *needquotamount,
87 uint *quotaflags)
88{
89 uint quotaondisk;
90 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
91
92 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
93 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
94
95 if (quotaondisk) {
96 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
97 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
98 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
99 }
100
101 /*
102 * If the device itself is read-only, we can't allow
103 * the user to change the state of quota on the mount -
104 * this would generate a transaction on the ro device,
105 * which would lead to an I/O error and shutdown
106 */
107
108 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
109 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
110 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
111 (!gquotaondisk && XFS_IS_GQUOTA_ON(mp)) ||
112 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
113 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp))) &&
114 xfs_dev_is_read_only(mp, "changing quota state")) {
115 xfs_warn(mp, "please mount with%s%s%s%s.",
116 (!quotaondisk ? "out quota" : ""),
117 (uquotaondisk ? " usrquota" : ""),
118 (gquotaondisk ? " grpquota" : ""),
119 (pquotaondisk ? " prjquota" : ""));
120 return XFS_ERROR(EPERM);
121 }
122
123 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
124 /*
125 * Call mount_quotas at this point only if we won't have to do
126 * a quotacheck.
127 */
128 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
129 /*
130 * If an error occurred, qm_mount_quotas code
131 * has already disabled quotas. So, just finish
132 * mounting, and get on with the boring life
133 * without disk quotas.
134 */
135 xfs_qm_mount_quotas(mp);
136 } else {
137 /*
138 * Clear the quota flags, but remember them. This
139 * is so that the quota code doesn't get invoked
140 * before we're ready. This can happen when an
141 * inode goes inactive and wants to free blocks,
142 * or via xfs_log_mount_finish.
143 */
144 *needquotamount = true;
145 *quotaflags = mp->m_qflags;
146 mp->m_qflags = 0;
147 }
148 }
149
150 return 0;
151}