tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
19static int
20xfs_qm_fill_state(
21 struct qc_type_state *tstate,
22 struct xfs_mount *mp,
23 xfs_dqtype_t type)
24{
25 struct xfs_inode *ip;
26 struct xfs_def_quota *defq;
27 int error;
28
29 error = xfs_qm_qino_load(mp, type, &ip);
30 if (error) {
31 tstate->ino = NULLFSINO;
32 return error != -ENOENT ? error : 0;
33 }
34
35 defq = xfs_get_defquota(mp->m_quotainfo, type);
36
37 tstate->ino = ip->i_ino;
38 tstate->flags |= QCI_SYSFILE;
39 tstate->blocks = ip->i_nblocks;
40 tstate->nextents = ip->i_df.if_nextents;
41 tstate->spc_timelimit = (u32)defq->blk.time;
42 tstate->ino_timelimit = (u32)defq->ino.time;
43 tstate->rt_spc_timelimit = (u32)defq->rtb.time;
44 tstate->spc_warnlimit = 0;
45 tstate->ino_warnlimit = 0;
46 tstate->rt_spc_warnlimit = 0;
47 xfs_irele(ip);
48
49 return 0;
50}
51
52/*
53 * Return quota status information, such as enforcements, quota file inode
54 * numbers etc.
55 */
56static int
57xfs_fs_get_quota_state(
58 struct super_block *sb,
59 struct qc_state *state)
60{
61 struct xfs_mount *mp = XFS_M(sb);
62 struct xfs_quotainfo *q = mp->m_quotainfo;
63 int error;
64
65 memset(state, 0, sizeof(*state));
66 if (!XFS_IS_QUOTA_ON(mp))
67 return 0;
68 state->s_incoredqs = min_t(uint64_t, q->qi_dquots, UINT_MAX);
69 if (XFS_IS_UQUOTA_ON(mp))
70 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED;
71 if (XFS_IS_UQUOTA_ENFORCED(mp))
72 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
73 if (XFS_IS_GQUOTA_ON(mp))
74 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED;
75 if (XFS_IS_GQUOTA_ENFORCED(mp))
76 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
77 if (XFS_IS_PQUOTA_ON(mp))
78 state->s_state[PRJQUOTA].flags |= QCI_ACCT_ENABLED;
79 if (XFS_IS_PQUOTA_ENFORCED(mp))
80 state->s_state[PRJQUOTA].flags |= QCI_LIMITS_ENFORCED;
81
82 error = xfs_qm_fill_state(&state->s_state[USRQUOTA], mp,
83 XFS_DQTYPE_USER);
84 if (error)
85 return error;
86 error = xfs_qm_fill_state(&state->s_state[GRPQUOTA], mp,
87 XFS_DQTYPE_GROUP);
88 if (error)
89 return error;
90 error = xfs_qm_fill_state(&state->s_state[PRJQUOTA], mp,
91 XFS_DQTYPE_PROJ);
92 if (error)
93 return error;
94 return 0;
95}
96
97STATIC xfs_dqtype_t
98xfs_quota_type(int type)
99{
100 switch (type) {
101 case USRQUOTA:
102 return XFS_DQTYPE_USER;
103 case GRPQUOTA:
104 return XFS_DQTYPE_GROUP;
105 default:
106 return XFS_DQTYPE_PROJ;
107 }
108}
109
110#define XFS_QC_SETINFO_MASK (QC_TIMER_MASK)
111
112/*
113 * Adjust quota timers & warnings
114 */
115static int
116xfs_fs_set_info(
117 struct super_block *sb,
118 int type,
119 struct qc_info *info)
120{
121 struct xfs_mount *mp = XFS_M(sb);
122 struct qc_dqblk newlim;
123
124 if (sb_rdonly(sb))
125 return -EROFS;
126 if (!XFS_IS_QUOTA_ON(mp))
127 return -ENOSYS;
128 if (info->i_fieldmask & ~XFS_QC_SETINFO_MASK)
129 return -EINVAL;
130 if ((info->i_fieldmask & XFS_QC_SETINFO_MASK) == 0)
131 return 0;
132
133 newlim.d_fieldmask = info->i_fieldmask;
134 newlim.d_spc_timer = info->i_spc_timelimit;
135 newlim.d_ino_timer = info->i_ino_timelimit;
136 newlim.d_rt_spc_timer = info->i_rt_spc_timelimit;
137 newlim.d_ino_warns = info->i_ino_warnlimit;
138 newlim.d_spc_warns = info->i_spc_warnlimit;
139 newlim.d_rt_spc_warns = info->i_rt_spc_warnlimit;
140
141 return xfs_qm_scall_setqlim(mp, 0, xfs_quota_type(type), &newlim);
142}
143
144static unsigned int
145xfs_quota_flags(unsigned int uflags)
146{
147 unsigned int flags = 0;
148
149 if (uflags & FS_QUOTA_UDQ_ACCT)
150 flags |= XFS_UQUOTA_ACCT;
151 if (uflags & FS_QUOTA_PDQ_ACCT)
152 flags |= XFS_PQUOTA_ACCT;
153 if (uflags & FS_QUOTA_GDQ_ACCT)
154 flags |= XFS_GQUOTA_ACCT;
155 if (uflags & FS_QUOTA_UDQ_ENFD)
156 flags |= XFS_UQUOTA_ENFD;
157 if (uflags & FS_QUOTA_GDQ_ENFD)
158 flags |= XFS_GQUOTA_ENFD;
159 if (uflags & FS_QUOTA_PDQ_ENFD)
160 flags |= XFS_PQUOTA_ENFD;
161
162 return flags;
163}
164
165STATIC int
166xfs_quota_enable(
167 struct super_block *sb,
168 unsigned int uflags)
169{
170 struct xfs_mount *mp = XFS_M(sb);
171
172 if (sb_rdonly(sb))
173 return -EROFS;
174 if (!XFS_IS_QUOTA_ON(mp))
175 return -ENOSYS;
176
177 return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags));
178}
179
180STATIC int
181xfs_quota_disable(
182 struct super_block *sb,
183 unsigned int uflags)
184{
185 struct xfs_mount *mp = XFS_M(sb);
186
187 if (sb_rdonly(sb))
188 return -EROFS;
189 if (!XFS_IS_QUOTA_ON(mp))
190 return -ENOSYS;
191
192 return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags));
193}
194
195STATIC int
196xfs_fs_rm_xquota(
197 struct super_block *sb,
198 unsigned int uflags)
199{
200 struct xfs_mount *mp = XFS_M(sb);
201 unsigned int flags = 0;
202
203 if (sb_rdonly(sb))
204 return -EROFS;
205
206 if (XFS_IS_QUOTA_ON(mp))
207 return -EINVAL;
208
209 if (uflags & ~(FS_USER_QUOTA | FS_GROUP_QUOTA | FS_PROJ_QUOTA))
210 return -EINVAL;
211
212 if (uflags & FS_USER_QUOTA)
213 flags |= XFS_QMOPT_UQUOTA;
214 if (uflags & FS_GROUP_QUOTA)
215 flags |= XFS_QMOPT_GQUOTA;
216 if (uflags & FS_PROJ_QUOTA)
217 flags |= XFS_QMOPT_PQUOTA;
218
219 return xfs_qm_scall_trunc_qfiles(mp, flags);
220}
221
222STATIC int
223xfs_fs_get_dqblk(
224 struct super_block *sb,
225 struct kqid qid,
226 struct qc_dqblk *qdq)
227{
228 struct xfs_mount *mp = XFS_M(sb);
229 xfs_dqid_t id;
230
231 if (!XFS_IS_QUOTA_ON(mp))
232 return -ENOSYS;
233
234 id = from_kqid(&init_user_ns, qid);
235 return xfs_qm_scall_getquota(mp, id, xfs_quota_type(qid.type), qdq);
236}
237
238/* Return quota info for active quota >= this qid */
239STATIC int
240xfs_fs_get_nextdqblk(
241 struct super_block *sb,
242 struct kqid *qid,
243 struct qc_dqblk *qdq)
244{
245 int ret;
246 struct xfs_mount *mp = XFS_M(sb);
247 xfs_dqid_t id;
248
249 if (!XFS_IS_QUOTA_ON(mp))
250 return -ENOSYS;
251
252 id = from_kqid(&init_user_ns, *qid);
253 ret = xfs_qm_scall_getquota_next(mp, &id, xfs_quota_type(qid->type),
254 qdq);
255 if (ret)
256 return ret;
257
258 /* ID may be different, so convert back what we got */
259 *qid = make_kqid(current_user_ns(), qid->type, id);
260 return 0;
261}
262
263STATIC int
264xfs_fs_set_dqblk(
265 struct super_block *sb,
266 struct kqid qid,
267 struct qc_dqblk *qdq)
268{
269 struct xfs_mount *mp = XFS_M(sb);
270
271 if (sb_rdonly(sb))
272 return -EROFS;
273 if (!XFS_IS_QUOTA_ON(mp))
274 return -ENOSYS;
275
276 return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
277 xfs_quota_type(qid.type), qdq);
278}
279
280const struct quotactl_ops xfs_quotactl_operations = {
281 .get_state = xfs_fs_get_quota_state,
282 .set_info = xfs_fs_set_info,
283 .quota_enable = xfs_quota_enable,
284 .quota_disable = xfs_quota_disable,
285 .rm_xquota = xfs_fs_rm_xquota,
286 .get_dqblk = xfs_fs_get_dqblk,
287 .get_nextdqblk = xfs_fs_get_nextdqblk,
288 .set_dqblk = xfs_fs_set_dqblk,
289};