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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_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}