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_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_itable.h"
40 #include "xfs_btree.h"
41 #include "xfs_bmap.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
44 #include "xfs_rw.h"
45 #include "xfs_acl.h"
46 #include "xfs_attr.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_qm.h"
49
50
51 STATIC void
xfs_fill_statvfs_from_dquot(struct kstatfs * statp,xfs_disk_dquot_t * dp)52 xfs_fill_statvfs_from_dquot(
53 struct kstatfs *statp,
54 xfs_disk_dquot_t *dp)
55 {
56 __uint64_t limit;
57
58 limit = dp->d_blk_softlimit ?
59 be64_to_cpu(dp->d_blk_softlimit) :
60 be64_to_cpu(dp->d_blk_hardlimit);
61 if (limit && statp->f_blocks > limit) {
62 statp->f_blocks = limit;
63 statp->f_bfree =
64 (statp->f_blocks > be64_to_cpu(dp->d_bcount)) ?
65 (statp->f_blocks - be64_to_cpu(dp->d_bcount)) : 0;
66 }
67
68 limit = dp->d_ino_softlimit ?
69 be64_to_cpu(dp->d_ino_softlimit) :
70 be64_to_cpu(dp->d_ino_hardlimit);
71 if (limit && statp->f_files > limit) {
72 statp->f_files = limit;
73 statp->f_ffree =
74 (statp->f_files > be64_to_cpu(dp->d_icount)) ?
75 (statp->f_ffree - be64_to_cpu(dp->d_icount)) : 0;
76 }
77 }
78
79
80 /*
81 * Directory tree accounting is implemented using project quotas, where
82 * the project identifier is inherited from parent directories.
83 * A statvfs (df, etc.) of a directory that is using project quota should
84 * return a statvfs of the project, not the entire filesystem.
85 * This makes such trees appear as if they are filesystems in themselves.
86 */
87 STATIC void
xfs_qm_statvfs(xfs_inode_t * ip,struct kstatfs * statp)88 xfs_qm_statvfs(
89 xfs_inode_t *ip,
90 struct kstatfs *statp)
91 {
92 xfs_mount_t *mp = ip->i_mount;
93 xfs_dquot_t *dqp;
94
95 if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
96 !((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
97 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
98 return;
99
100 if (!xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp)) {
101 xfs_disk_dquot_t *dp = &dqp->q_core;
102
103 xfs_fill_statvfs_from_dquot(statp, dp);
104 xfs_qm_dqput(dqp);
105 }
106 }
107
108 STATIC int
xfs_qm_newmount(xfs_mount_t * mp,uint * needquotamount,uint * quotaflags)109 xfs_qm_newmount(
110 xfs_mount_t *mp,
111 uint *needquotamount,
112 uint *quotaflags)
113 {
114 uint quotaondisk;
115 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
116
117 *quotaflags = 0;
118 *needquotamount = B_FALSE;
119
120 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
121 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
122
123 if (quotaondisk) {
124 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
125 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
126 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
127 }
128
129 /*
130 * If the device itself is read-only, we can't allow
131 * the user to change the state of quota on the mount -
132 * this would generate a transaction on the ro device,
133 * which would lead to an I/O error and shutdown
134 */
135
136 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
137 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
138 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
139 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
140 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
141 (!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
142 xfs_dev_is_read_only(mp, "changing quota state")) {
143 cmn_err(CE_WARN,
144 "XFS: please mount with%s%s%s%s.",
145 (!quotaondisk ? "out quota" : ""),
146 (uquotaondisk ? " usrquota" : ""),
147 (pquotaondisk ? " prjquota" : ""),
148 (gquotaondisk ? " grpquota" : ""));
149 return XFS_ERROR(EPERM);
150 }
151
152 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
153 /*
154 * Call mount_quotas at this point only if we won't have to do
155 * a quotacheck.
156 */
157 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
158 /*
159 * If an error occured, qm_mount_quotas code
160 * has already disabled quotas. So, just finish
161 * mounting, and get on with the boring life
162 * without disk quotas.
163 */
164 xfs_qm_mount_quotas(mp);
165 } else {
166 /*
167 * Clear the quota flags, but remember them. This
168 * is so that the quota code doesn't get invoked
169 * before we're ready. This can happen when an
170 * inode goes inactive and wants to free blocks,
171 * or via xfs_log_mount_finish.
172 */
173 *needquotamount = B_TRUE;
174 *quotaflags = mp->m_qflags;
175 mp->m_qflags = 0;
176 }
177 }
178
179 return 0;
180 }
181
182 STATIC int
xfs_qm_endmount(xfs_mount_t * mp,uint needquotamount,uint quotaflags)183 xfs_qm_endmount(
184 xfs_mount_t *mp,
185 uint needquotamount,
186 uint quotaflags)
187 {
188 if (needquotamount) {
189 ASSERT(mp->m_qflags == 0);
190 mp->m_qflags = quotaflags;
191 xfs_qm_mount_quotas(mp);
192 }
193
194 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
195 if (! (XFS_IS_QUOTA_ON(mp)))
196 xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
197 else
198 xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
199 #endif
200
201 #ifdef QUOTADEBUG
202 if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
203 cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
204 #endif
205
206 return 0;
207 }
208
209 STATIC void
xfs_qm_dqrele_null(xfs_dquot_t * dq)210 xfs_qm_dqrele_null(
211 xfs_dquot_t *dq)
212 {
213 /*
214 * Called from XFS, where we always check first for a NULL dquot.
215 */
216 if (!dq)
217 return;
218 xfs_qm_dqrele(dq);
219 }
220
221
222 struct xfs_qmops xfs_qmcore_xfs = {
223 .xfs_qminit = xfs_qm_newmount,
224 .xfs_qmdone = xfs_qm_unmount_quotadestroy,
225 .xfs_qmmount = xfs_qm_endmount,
226 .xfs_qmunmount = xfs_qm_unmount_quotas,
227 .xfs_dqrele = xfs_qm_dqrele_null,
228 .xfs_dqattach = xfs_qm_dqattach,
229 .xfs_dqdetach = xfs_qm_dqdetach,
230 .xfs_dqpurgeall = xfs_qm_dqpurge_all,
231 .xfs_dqvopalloc = xfs_qm_vop_dqalloc,
232 .xfs_dqvopcreate = xfs_qm_vop_dqattach_and_dqmod_newinode,
233 .xfs_dqvoprename = xfs_qm_vop_rename_dqattach,
234 .xfs_dqvopchown = xfs_qm_vop_chown,
235 .xfs_dqvopchownresv = xfs_qm_vop_chown_reserve,
236 .xfs_dqstatvfs = xfs_qm_statvfs,
237 .xfs_dqsync = xfs_qm_sync,
238 .xfs_quotactl = xfs_qm_quotactl,
239 .xfs_dqtrxops = &xfs_trans_dquot_ops,
240 };
241 EXPORT_SYMBOL(xfs_qmcore_xfs);
242
243 void __init
xfs_qm_init(void)244 xfs_qm_init(void)
245 {
246 printk(KERN_INFO "SGI XFS Quota Management subsystem\n");
247 mutex_init(&xfs_Gqm_lock);
248 xfs_qm_init_procfs();
249 }
250
251 void __exit
xfs_qm_exit(void)252 xfs_qm_exit(void)
253 {
254 xfs_qm_cleanup_procfs();
255 if (qm_dqzone)
256 kmem_zone_destroy(qm_dqzone);
257 if (qm_dqtrxzone)
258 kmem_zone_destroy(qm_dqtrxzone);
259 }
260