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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_format.h"
20 #include "xfs_log_format.h"
21 #include "xfs_trans_resv.h"
22 #include "xfs_mount.h"
23 #include "xfs_inode.h"
24 #include "xfs_quota.h"
25 #include "xfs_trans.h"
26 #include "xfs_trace.h"
27 #include "xfs_icache.h"
28 #include "xfs_qm.h"
29 #include <linux/quota.h>
30
31
32 static void
33 xfs_qm_fill_state(
34         struct qc_type_state    *tstate,
35         struct xfs_mount        *mp,
36         struct xfs_inode        *ip,
37         xfs_ino_t               ino)
38 {
39         struct xfs_quotainfo *q = mp->m_quotainfo;
40         bool tempqip = false;
41
42         tstate->ino = ino;
43         if (!ip && ino == NULLFSINO)
44                 return;
45         if (!ip) {
46                 if (xfs_iget(mp, NULL, ino, 0, 0, &ip))
47                         return;
48                 tempqip = true;
49         }
50         tstate->flags |= QCI_SYSFILE;
51         tstate->blocks = ip->i_d.di_nblocks;
52         tstate->nextents = ip->i_d.di_nextents;
53         tstate->spc_timelimit = q->qi_btimelimit;
54         tstate->ino_timelimit = q->qi_itimelimit;
55         tstate->rt_spc_timelimit = q->qi_rtbtimelimit;
56         tstate->spc_warnlimit = q->qi_bwarnlimit;
57         tstate->ino_warnlimit = q->qi_iwarnlimit;
58         tstate->rt_spc_warnlimit = q->qi_rtbwarnlimit;
59         if (tempqip)
60                 IRELE(ip);
61 }
62
63 /*
64  * Return quota status information, such as enforcements, quota file inode
65  * numbers etc.
66  */
67 static int
68 xfs_fs_get_quota_state(
69         struct super_block      *sb,
70         struct qc_state         *state)
71 {
72         struct xfs_mount *mp = XFS_M(sb);
73         struct xfs_quotainfo *q = mp->m_quotainfo;
74
75         memset(state, 0, sizeof(*state));
76         if (!XFS_IS_QUOTA_RUNNING(mp))
77                 return 0;
78         state->s_incoredqs = q->qi_dquots;
79         if (XFS_IS_UQUOTA_RUNNING(mp))
80                 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED;
81         if (XFS_IS_UQUOTA_ENFORCED(mp))
82                 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
83         if (XFS_IS_GQUOTA_RUNNING(mp))
84                 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED;
85         if (XFS_IS_GQUOTA_ENFORCED(mp))
86                 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
87         if (XFS_IS_PQUOTA_RUNNING(mp))
88                 state->s_state[PRJQUOTA].flags |= QCI_ACCT_ENABLED;
89         if (XFS_IS_PQUOTA_ENFORCED(mp))
90                 state->s_state[PRJQUOTA].flags |= QCI_LIMITS_ENFORCED;
91
92         xfs_qm_fill_state(&state->s_state[USRQUOTA], mp, q->qi_uquotaip,
93                           mp->m_sb.sb_uquotino);
94         xfs_qm_fill_state(&state->s_state[GRPQUOTA], mp, q->qi_gquotaip,
95                           mp->m_sb.sb_gquotino);
96         xfs_qm_fill_state(&state->s_state[PRJQUOTA], mp, q->qi_pquotaip,
97                           mp->m_sb.sb_pquotino);
98         return 0;
99 }
100
101 STATIC int
102 xfs_quota_type(int type)
103 {
104         switch (type) {
105         case USRQUOTA:
106                 return XFS_DQ_USER;
107         case GRPQUOTA:
108                 return XFS_DQ_GROUP;
109         default:
110                 return XFS_DQ_PROJ;
111         }
112 }
113
114 #define XFS_QC_SETINFO_MASK (QC_TIMER_MASK | QC_WARNS_MASK)
115
116 /*
117  * Adjust quota timers & warnings
118  */
119 static int
120 xfs_fs_set_info(
121         struct super_block      *sb,
122         int                     type,
123         struct qc_info          *info)
124 {
125         struct xfs_mount *mp = XFS_M(sb);
126         struct qc_dqblk newlim;
127
128         if (sb->s_flags & MS_RDONLY)
129                 return -EROFS;
130         if (!XFS_IS_QUOTA_RUNNING(mp))
131                 return -ENOSYS;
132         if (!XFS_IS_QUOTA_ON(mp))
133                 return -ESRCH;
134         if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK)
135                 return -EINVAL;
136         if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0)
137                 return 0;
138
139         newlim.d_fieldmask = info->i_fieldmask;
140         newlim.d_spc_timer = info->i_spc_timelimit;
141         newlim.d_ino_timer = info->i_ino_timelimit;
142         newlim.d_rt_spc_timer = info->i_rt_spc_timelimit;
143         newlim.d_ino_warns = info->i_ino_warnlimit;
144         newlim.d_spc_warns = info->i_spc_warnlimit;
145         newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit;
146
147         return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim);
148 }
149
150 static unsigned int
151 xfs_quota_flags(unsigned int uflags)
152 {
153         unsigned int flags = 0;
154
155         if (uflags & FS_QUOTA_UDQ_ACCT)
156                 flags |= XFS_UQUOTA_ACCT;
157         if (uflags & FS_QUOTA_PDQ_ACCT)
158                 flags |= XFS_PQUOTA_ACCT;
159         if (uflags & FS_QUOTA_GDQ_ACCT)
160                 flags |= XFS_GQUOTA_ACCT;
161         if (uflags & FS_QUOTA_UDQ_ENFD)
162                 flags |= XFS_UQUOTA_ENFD;
163         if (uflags & FS_QUOTA_GDQ_ENFD)
164                 flags |= XFS_GQUOTA_ENFD;
165         if (uflags & FS_QUOTA_PDQ_ENFD)
166                 flags |= XFS_PQUOTA_ENFD;
167
168         return flags;
169 }
170
171 STATIC int
172 xfs_quota_enable(
173         struct super_block      *sb,
174         unsigned int            uflags)
175 {
176         struct xfs_mount        *mp = XFS_M(sb);
177
178         if (sb->s_flags & MS_RDONLY)
179                 return -EROFS;
180         if (!XFS_IS_QUOTA_RUNNING(mp))
181                 return -ENOSYS;
182
183         return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags));
184 }
185
186 STATIC int
187 xfs_quota_disable(
188         struct super_block      *sb,
189         unsigned int            uflags)
190 {
191         struct xfs_mount        *mp = XFS_M(sb);
192
193         if (sb->s_flags & MS_RDONLY)
194                 return -EROFS;
195         if (!XFS_IS_QUOTA_RUNNING(mp))
196                 return -ENOSYS;
197         if (!XFS_IS_QUOTA_ON(mp))
198                 return -EINVAL;
199
200         return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags));
201 }
202
203 STATIC int
204 xfs_fs_rm_xquota(
205         struct super_block      *sb,
206         unsigned int            uflags)
207 {
208         struct xfs_mount        *mp = XFS_M(sb);
209         unsigned int            flags = 0;
210
211         if (sb->s_flags & MS_RDONLY)
212                 return -EROFS;
213
214         if (XFS_IS_QUOTA_ON(mp))
215                 return -EINVAL;
216
217         if (uflags & FS_USER_QUOTA)
218                 flags |= XFS_DQ_USER;
219         if (uflags & FS_GROUP_QUOTA)
220                 flags |= XFS_DQ_GROUP;
221         if (uflags & FS_PROJ_QUOTA)
222                 flags |= XFS_DQ_PROJ;
223
224         return xfs_qm_scall_trunc_qfiles(mp, flags);
225 }
226
227 STATIC int
228 xfs_fs_get_dqblk(
229         struct super_block      *sb,
230         struct kqid             qid,
231         struct qc_dqblk         *qdq)
232 {
233         struct xfs_mount        *mp = XFS_M(sb);
234         xfs_dqid_t              id;
235
236         if (!XFS_IS_QUOTA_RUNNING(mp))
237                 return -ENOSYS;
238         if (!XFS_IS_QUOTA_ON(mp))
239                 return -ESRCH;
240
241         id = from_kqid(&init_user_ns, qid);
242         return xfs_qm_scall_getquota(mp, &id,
243                                       xfs_quota_type(qid.type), qdq, 0);
244 }
245
246 /* Return quota info for active quota >= this qid */
247 STATIC int
248 xfs_fs_get_nextdqblk(
249         struct super_block      *sb,
250         struct kqid             *qid,
251         struct qc_dqblk         *qdq)
252 {
253         int                     ret;
254         struct xfs_mount        *mp = XFS_M(sb);
255         xfs_dqid_t              id;
256
257         if (!XFS_IS_QUOTA_RUNNING(mp))
258                 return -ENOSYS;
259         if (!XFS_IS_QUOTA_ON(mp))
260                 return -ESRCH;
261
262         id = from_kqid(&init_user_ns, *qid);
263         ret = xfs_qm_scall_getquota(mp, &id,
264                                     xfs_quota_type(qid->type), qdq,
265                                     XFS_QMOPT_DQNEXT);
266         if (ret)
267                 return ret;
268
269         /* ID may be different, so convert back what we got */
270         *qid = make_kqid(current_user_ns(), qid->type, id);
271         return 0;
272         
273 }
274
275 STATIC int
276 xfs_fs_set_dqblk(
277         struct super_block      *sb,
278         struct kqid             qid,
279         struct qc_dqblk         *qdq)
280 {
281         struct xfs_mount        *mp = XFS_M(sb);
282
283         if (sb->s_flags & MS_RDONLY)
284                 return -EROFS;
285         if (!XFS_IS_QUOTA_RUNNING(mp))
286                 return -ENOSYS;
287         if (!XFS_IS_QUOTA_ON(mp))
288                 return -ESRCH;
289
290         return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
291                                      xfs_quota_type(qid.type), qdq);
292 }
293
294 const struct quotactl_ops xfs_quotactl_operations = {
295         .get_state              = xfs_fs_get_quota_state,
296         .set_info               = xfs_fs_set_info,
297         .quota_enable           = xfs_quota_enable,
298         .quota_disable          = xfs_quota_disable,
299         .rm_xquota              = xfs_fs_rm_xquota,
300         .get_dqblk              = xfs_fs_get_dqblk,
301         .get_nextdqblk          = xfs_fs_get_nextdqblk,
302         .set_dqblk              = xfs_fs_set_dqblk,
303 };