1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2008, Christoph Hellwig
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_shared.h"
8 #include "xfs_format.h"
9 #include "xfs_log_format.h"
10 #include "xfs_trans_resv.h"
11 #include "xfs_mount.h"
12 #include "xfs_inode.h"
13 #include "xfs_quota.h"
14 #include "xfs_trans.h"
15 #include "xfs_icache.h"
16 #include "xfs_qm.h"
17
18
19 static void
20 xfs_qm_fill_state(
21 struct qc_type_state *tstate,
22 struct xfs_mount *mp,
23 struct xfs_inode *ip,
24 xfs_ino_t ino,
25 struct xfs_def_quota *defq)
26 {
27 bool tempqip = false;
28
29 tstate->ino = ino;
30 if (!ip && ino == NULLFSINO)
31 return;
32 if (!ip) {
33 if (xfs_iget(mp, NULL, ino, 0, 0, &ip))
34 return;
35 tempqip = true;
36 }
37 tstate->flags |= QCI_SYSFILE;
38 tstate->blocks = ip->i_nblocks;
39 tstate->nextents = ip->i_df.if_nextents;
40 tstate->spc_timelimit = (u32)defq->blk.time;
41 tstate->ino_timelimit = (u32)defq->ino.time;
42 tstate->rt_spc_timelimit = (u32)defq->rtb.time;
43 tstate->spc_warnlimit = 0;
44 tstate->ino_warnlimit = 0;
45 tstate->rt_spc_warnlimit = 0;
46 if (tempqip)
47 xfs_irele(ip);
48 }
49
50 /*
51 * Return quota status information, such as enforcements, quota file inode
52 * numbers etc.
53 */
54 static int
55 xfs_fs_get_quota_state(
56 struct super_block *sb,
57 struct qc_state *state)
58 {
59 struct xfs_mount *mp = XFS_M(sb);
60 struct xfs_quotainfo *q = mp->m_quotainfo;
61
62 memset(state, 0, sizeof(*state));
63 if (!XFS_IS_QUOTA_ON(mp))
64 return 0;
65 state->s_incoredqs = q->qi_dquots;
66 if (XFS_IS_UQUOTA_ON(mp))
67 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED;
68 if (XFS_IS_UQUOTA_ENFORCED(mp))
69 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
70 if (XFS_IS_GQUOTA_ON(mp))
71 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED;
72 if (XFS_IS_GQUOTA_ENFORCED(mp))
73 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
74 if (XFS_IS_PQUOTA_ON(mp))
75 state->s_state[PRJQUOTA].flags |= QCI_ACCT_ENABLED;
76 if (XFS_IS_PQUOTA_ENFORCED(mp))
77 state->s_state[PRJQUOTA].flags |= QCI_LIMITS_ENFORCED;
78
79 xfs_qm_fill_state(&state->s_state[USRQUOTA], mp, q->qi_uquotaip,
80 mp->m_sb.sb_uquotino, &q->qi_usr_default);
81 xfs_qm_fill_state(&state->s_state[GRPQUOTA], mp, q->qi_gquotaip,
82 mp->m_sb.sb_gquotino, &q->qi_grp_default);
83 xfs_qm_fill_state(&state->s_state[PRJQUOTA], mp, q->qi_pquotaip,
84 mp->m_sb.sb_pquotino, &q->qi_prj_default);
85 return 0;
86 }
87
88 STATIC xfs_dqtype_t
89 xfs_quota_type(int type)
90 {
91 switch (type) {
92 case USRQUOTA:
93 return XFS_DQTYPE_USER;
94 case GRPQUOTA:
95 return XFS_DQTYPE_GROUP;
96 default:
97 return XFS_DQTYPE_PROJ;
98 }
99 }
100
101 #define XFS_QC_SETINFO_MASK (QC_TIMER_MASK)
102
103 /*
104 * Adjust quota timers & warnings
105 */
106 static int
107 xfs_fs_set_info(
108 struct super_block *sb,
109 int type,
110 struct qc_info *info)
111 {
112 struct xfs_mount *mp = XFS_M(sb);
113 struct qc_dqblk newlim;
114
115 if (sb_rdonly(sb))
116 return -EROFS;
117 if (!XFS_IS_QUOTA_ON(mp))
118 return -ENOSYS;
119 if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK)
120 return -EINVAL;
121 if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0)
122 return 0;
123
124 newlim.d_fieldmask = info->i_fieldmask;
125 newlim.d_spc_timer = info->i_spc_timelimit;
126 newlim.d_ino_timer = info->i_ino_timelimit;
127 newlim.d_rt_spc_timer = info->i_rt_spc_timelimit;
128 newlim.d_ino_warns = info->i_ino_warnlimit;
129 newlim.d_spc_warns = info->i_spc_warnlimit;
130 newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit;
131
132 return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim);
133 }
134
135 static unsigned int
136 xfs_quota_flags(unsigned int uflags)
137 {
138 unsigned int flags = 0;
139
140 if (uflags & FS_QUOTA_UDQ_ACCT)
141 flags |= XFS_UQUOTA_ACCT;
142 if (uflags & FS_QUOTA_PDQ_ACCT)
143 flags |= XFS_PQUOTA_ACCT;
144 if (uflags & FS_QUOTA_GDQ_ACCT)
145 flags |= XFS_GQUOTA_ACCT;
146 if (uflags & FS_QUOTA_UDQ_ENFD)
147 flags |= XFS_UQUOTA_ENFD;
148 if (uflags & FS_QUOTA_GDQ_ENFD)
149 flags |= XFS_GQUOTA_ENFD;
150 if (uflags & FS_QUOTA_PDQ_ENFD)
151 flags |= XFS_PQUOTA_ENFD;
152
153 return flags;
154 }
155
156 STATIC int
157 xfs_quota_enable(
158 struct super_block *sb,
159 unsigned int uflags)
160 {
161 struct xfs_mount *mp = XFS_M(sb);
162
163 if (sb_rdonly(sb))
164 return -EROFS;
165 if (!XFS_IS_QUOTA_ON(mp))
166 return -ENOSYS;
167
168 return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags));
169 }
170
171 STATIC int
172 xfs_quota_disable(
173 struct super_block *sb,
174 unsigned int uflags)
175 {
176 struct xfs_mount *mp = XFS_M(sb);
177
178 if (sb_rdonly(sb))
179 return -EROFS;
180 if (!XFS_IS_QUOTA_ON(mp))
181 return -ENOSYS;
182
183 return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags));
184 }
185
186 STATIC int
187 xfs_fs_rm_xquota(
188 struct super_block *sb,
189 unsigned int uflags)
190 {
191 struct xfs_mount *mp = XFS_M(sb);
192 unsigned int flags = 0;
193
194 if (sb_rdonly(sb))
195 return -EROFS;
196
197 if (XFS_IS_QUOTA_ON(mp))
198 return -EINVAL;
199
200 if (uflags & ~(FS_USER_QUOTA | FS_GROUP_QUOTA | FS_PROJ_QUOTA))
201 return -EINVAL;
202
203 if (uflags & FS_USER_QUOTA)
204 flags |= XFS_QMOPT_UQUOTA;
205 if (uflags & FS_GROUP_QUOTA)
206 flags |= XFS_QMOPT_GQUOTA;
207 if (uflags & FS_PROJ_QUOTA)
208 flags |= XFS_QMOPT_PQUOTA;
209
210 return xfs_qm_scall_trunc_qfiles(mp, flags);
211 }
212
213 STATIC int
214 xfs_fs_get_dqblk(
215 struct super_block *sb,
216 struct kqid qid,
217 struct qc_dqblk *qdq)
218 {
219 struct xfs_mount *mp = XFS_M(sb);
220 xfs_dqid_t id;
221
222 if (!XFS_IS_QUOTA_ON(mp))
223 return -ENOSYS;
224
225 id = from_kqid(&init_user_ns, qid);
226 return xfs_qm_scall_getquota(mp, id, xfs_quota_type(qid.type), qdq);
227 }
228
229 /* Return quota info for active quota >= this qid */
230 STATIC int
231 xfs_fs_get_nextdqblk(
232 struct super_block *sb,
233 struct kqid *qid,
234 struct qc_dqblk *qdq)
235 {
236 int ret;
237 struct xfs_mount *mp = XFS_M(sb);
238 xfs_dqid_t id;
239
240 if (!XFS_IS_QUOTA_ON(mp))
241 return -ENOSYS;
242
243 id = from_kqid(&init_user_ns, *qid);
244 ret = xfs_qm_scall_getquota_next(mp, &id, xfs_quota_type(qid->type),
245 qdq);
246 if (ret)
247 return ret;
248
249 /* ID may be different, so convert back what we got */
250 *qid = make_kqid(current_user_ns(), qid->type, id);
251 return 0;
252 }
253
254 STATIC int
255 xfs_fs_set_dqblk(
256 struct super_block *sb,
257 struct kqid qid,
258 struct qc_dqblk *qdq)
259 {
260 struct xfs_mount *mp = XFS_M(sb);
261
262 if (sb_rdonly(sb))
263 return -EROFS;
264 if (!XFS_IS_QUOTA_ON(mp))
265 return -ENOSYS;
266
267 return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
268 xfs_quota_type(qid.type), qdq);
269 }
270
271 const struct quotactl_ops xfs_quotactl_operations = {
272 .get_state = xfs_fs_get_quota_state,
273 .set_info = xfs_fs_set_info,
274 .quota_enable = xfs_quota_enable,
275 .quota_disable = xfs_quota_disable,
276 .rm_xquota = xfs_fs_rm_xquota,
277 .get_dqblk = xfs_fs_get_dqblk,
278 .get_nextdqblk = xfs_fs_get_nextdqblk,
279 .set_dqblk = xfs_fs_set_dqblk,
280 };
281
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