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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 1982, 1986 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Robert Elz at The University of Melbourne. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the name of the University nor the names of its contributors | |
17 | * may be used to endorse or promote products derived from this software | |
18 | * without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | * SUCH DAMAGE. | |
1da177e4 | 31 | */ |
1da177e4 LT |
32 | #ifndef _LINUX_QUOTA_ |
33 | #define _LINUX_QUOTA_ | |
34 | ||
8b91de2e | 35 | #include <linux/list.h> |
0409d3a3 | 36 | #include <linux/mutex.h> |
8b91de2e MW |
37 | #include <linux/rwsem.h> |
38 | #include <linux/spinlock.h> | |
39 | #include <linux/wait.h> | |
f32764bd | 40 | #include <linux/percpu_counter.h> |
1da177e4 LT |
41 | |
42 | #include <linux/dqblk_xfs.h> | |
43 | #include <linux/dqblk_v1.h> | |
44 | #include <linux/dqblk_v2.h> | |
45 | ||
60063497 | 46 | #include <linux/atomic.h> |
e8a3e471 EB |
47 | #include <linux/uidgid.h> |
48 | #include <linux/projid.h> | |
607ca46e | 49 | #include <uapi/linux/quota.h> |
e8a3e471 EB |
50 | |
51 | #undef USRQUOTA | |
52 | #undef GRPQUOTA | |
53 | enum quota_type { | |
54 | USRQUOTA = 0, /* element used for user quotas */ | |
55 | GRPQUOTA = 1, /* element used for group quotas */ | |
56 | PRJQUOTA = 2, /* element used for project quotas */ | |
57 | }; | |
8b91de2e | 58 | |
2c5f648a JK |
59 | /* Masks for quota types when used as a bitmask */ |
60 | #define QTYPE_MASK_USR (1 << USRQUOTA) | |
61 | #define QTYPE_MASK_GRP (1 << GRPQUOTA) | |
62 | #define QTYPE_MASK_PRJ (1 << PRJQUOTA) | |
63 | ||
74abb989 | 64 | typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ |
db49d2df | 65 | typedef long long qsize_t; /* Type in which we store sizes */ |
74abb989 | 66 | |
e8a3e471 EB |
67 | struct kqid { /* Type in which we store the quota identifier */ |
68 | union { | |
69 | kuid_t uid; | |
70 | kgid_t gid; | |
71 | kprojid_t projid; | |
72 | }; | |
73 | enum quota_type type; /* USRQUOTA (uid) or GRPQUOTA (gid) or PRJQUOTA (projid) */ | |
74 | }; | |
75 | ||
76 | extern bool qid_eq(struct kqid left, struct kqid right); | |
77 | extern bool qid_lt(struct kqid left, struct kqid right); | |
78 | extern qid_t from_kqid(struct user_namespace *to, struct kqid qid); | |
79 | extern qid_t from_kqid_munged(struct user_namespace *to, struct kqid qid); | |
80 | extern bool qid_valid(struct kqid qid); | |
81 | ||
82 | /** | |
83 | * make_kqid - Map a user-namespace, type, qid tuple into a kqid. | |
84 | * @from: User namespace that the qid is in | |
85 | * @type: The type of quota | |
86 | * @qid: Quota identifier | |
87 | * | |
88 | * Maps a user-namespace, type qid tuple into a kernel internal | |
89 | * kqid, and returns that kqid. | |
90 | * | |
91 | * When there is no mapping defined for the user-namespace, type, | |
92 | * qid tuple an invalid kqid is returned. Callers are expected to | |
93 | * test for and handle handle invalid kqids being returned. | |
94 | * Invalid kqids may be tested for using qid_valid(). | |
95 | */ | |
96 | static inline struct kqid make_kqid(struct user_namespace *from, | |
97 | enum quota_type type, qid_t qid) | |
98 | { | |
99 | struct kqid kqid; | |
100 | ||
101 | kqid.type = type; | |
102 | switch (type) { | |
103 | case USRQUOTA: | |
104 | kqid.uid = make_kuid(from, qid); | |
105 | break; | |
106 | case GRPQUOTA: | |
107 | kqid.gid = make_kgid(from, qid); | |
108 | break; | |
109 | case PRJQUOTA: | |
110 | kqid.projid = make_kprojid(from, qid); | |
111 | break; | |
112 | default: | |
113 | BUG(); | |
114 | } | |
115 | return kqid; | |
116 | } | |
117 | ||
118 | /** | |
119 | * make_kqid_invalid - Explicitly make an invalid kqid | |
120 | * @type: The type of quota identifier | |
121 | * | |
122 | * Returns an invalid kqid with the specified type. | |
123 | */ | |
124 | static inline struct kqid make_kqid_invalid(enum quota_type type) | |
125 | { | |
126 | struct kqid kqid; | |
127 | ||
128 | kqid.type = type; | |
129 | switch (type) { | |
130 | case USRQUOTA: | |
131 | kqid.uid = INVALID_UID; | |
132 | break; | |
133 | case GRPQUOTA: | |
134 | kqid.gid = INVALID_GID; | |
135 | break; | |
136 | case PRJQUOTA: | |
137 | kqid.projid = INVALID_PROJID; | |
138 | break; | |
139 | default: | |
140 | BUG(); | |
141 | } | |
142 | return kqid; | |
143 | } | |
144 | ||
145 | /** | |
146 | * make_kqid_uid - Make a kqid from a kuid | |
147 | * @uid: The kuid to make the quota identifier from | |
148 | */ | |
149 | static inline struct kqid make_kqid_uid(kuid_t uid) | |
150 | { | |
151 | struct kqid kqid; | |
152 | kqid.type = USRQUOTA; | |
153 | kqid.uid = uid; | |
154 | return kqid; | |
155 | } | |
156 | ||
157 | /** | |
158 | * make_kqid_gid - Make a kqid from a kgid | |
159 | * @gid: The kgid to make the quota identifier from | |
160 | */ | |
161 | static inline struct kqid make_kqid_gid(kgid_t gid) | |
162 | { | |
163 | struct kqid kqid; | |
164 | kqid.type = GRPQUOTA; | |
165 | kqid.gid = gid; | |
166 | return kqid; | |
167 | } | |
168 | ||
169 | /** | |
170 | * make_kqid_projid - Make a kqid from a projid | |
171 | * @projid: The kprojid to make the quota identifier from | |
172 | */ | |
173 | static inline struct kqid make_kqid_projid(kprojid_t projid) | |
174 | { | |
175 | struct kqid kqid; | |
176 | kqid.type = PRJQUOTA; | |
177 | kqid.projid = projid; | |
178 | return kqid; | |
179 | } | |
180 | ||
181 | ||
acd64b73 MF |
182 | extern spinlock_t dq_data_lock; |
183 | ||
1da177e4 | 184 | /* Maximal numbers of writes for quota operation (insert/delete/update) |
4e5117ba JK |
185 | * (over VFS all formats) */ |
186 | #define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC) | |
187 | #define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE) | |
188 | #define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC) | |
189 | #define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE) | |
1da177e4 LT |
190 | |
191 | /* | |
192 | * Data for one user/group kept in memory | |
193 | */ | |
194 | struct mem_dqblk { | |
12095460 JK |
195 | qsize_t dqb_bhardlimit; /* absolute limit on disk blks alloc */ |
196 | qsize_t dqb_bsoftlimit; /* preferred limit on disk blks */ | |
1da177e4 | 197 | qsize_t dqb_curspace; /* current used space */ |
f18df228 | 198 | qsize_t dqb_rsvspace; /* current reserved space for delalloc*/ |
12095460 JK |
199 | qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */ |
200 | qsize_t dqb_isoftlimit; /* preferred inode limit */ | |
201 | qsize_t dqb_curinodes; /* current # allocated inodes */ | |
1da177e4 LT |
202 | time_t dqb_btime; /* time limit for excessive disk use */ |
203 | time_t dqb_itime; /* time limit for excessive inode use */ | |
204 | }; | |
205 | ||
206 | /* | |
207 | * Data for one quotafile kept in memory | |
208 | */ | |
209 | struct quota_format_type; | |
210 | ||
211 | struct mem_dqinfo { | |
212 | struct quota_format_type *dqi_format; | |
0ff5af83 JK |
213 | int dqi_fmt_id; /* Id of the dqi_format - used when turning |
214 | * quotas on after remount RW */ | |
1da177e4 LT |
215 | struct list_head dqi_dirty_list; /* List of dirty dquots */ |
216 | unsigned long dqi_flags; | |
217 | unsigned int dqi_bgrace; | |
218 | unsigned int dqi_igrace; | |
338bf9af AP |
219 | qsize_t dqi_maxblimit; |
220 | qsize_t dqi_maxilimit; | |
e3d4d56b | 221 | void *dqi_priv; |
1da177e4 LT |
222 | }; |
223 | ||
224 | struct super_block; | |
225 | ||
226 | #define DQF_MASK 0xffff /* Mask for format specific flags */ | |
46fe44ce JK |
227 | #define DQF_GETINFO_MASK 0x1ffff /* Mask for flags passed to userspace */ |
228 | #define DQF_SETINFO_MASK 0xffff /* Mask for flags modifiable from userspace */ | |
229 | #define DQF_SYS_FILE_B 16 | |
230 | #define DQF_SYS_FILE (1 << DQF_SYS_FILE_B) /* Quota file stored as system file */ | |
231 | #define DQF_INFO_DIRTY_B 31 | |
1da177e4 LT |
232 | #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */ |
233 | ||
234 | extern void mark_info_dirty(struct super_block *sb, int type); | |
03b06343 JK |
235 | static inline int info_dirty(struct mem_dqinfo *info) |
236 | { | |
237 | return test_bit(DQF_INFO_DIRTY_B, &info->dqi_flags); | |
238 | } | |
1da177e4 | 239 | |
dde95888 DM |
240 | enum { |
241 | DQST_LOOKUPS, | |
242 | DQST_DROPS, | |
243 | DQST_READS, | |
244 | DQST_WRITES, | |
245 | DQST_CACHE_HITS, | |
246 | DQST_ALLOC_DQUOTS, | |
247 | DQST_FREE_DQUOTS, | |
248 | DQST_SYNCS, | |
249 | _DQST_DQSTAT_LAST | |
250 | }; | |
251 | ||
1da177e4 | 252 | struct dqstats { |
dde95888 | 253 | int stat[_DQST_DQSTAT_LAST]; |
f32764bd | 254 | struct percpu_counter counter[_DQST_DQSTAT_LAST]; |
1da177e4 LT |
255 | }; |
256 | ||
dde95888 | 257 | extern struct dqstats *dqstats_pcpu; |
1da177e4 LT |
258 | extern struct dqstats dqstats; |
259 | ||
dde95888 DM |
260 | static inline void dqstats_inc(unsigned int type) |
261 | { | |
f32764bd | 262 | percpu_counter_inc(&dqstats.counter[type]); |
dde95888 DM |
263 | } |
264 | ||
265 | static inline void dqstats_dec(unsigned int type) | |
266 | { | |
f32764bd | 267 | percpu_counter_dec(&dqstats.counter[type]); |
dde95888 DM |
268 | } |
269 | ||
1da177e4 LT |
270 | #define DQ_MOD_B 0 /* dquot modified since read */ |
271 | #define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */ | |
272 | #define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */ | |
273 | #define DQ_FAKE_B 3 /* no limits only usage */ | |
274 | #define DQ_READ_B 4 /* dquot was read into memory */ | |
275 | #define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */ | |
4d59bce4 JK |
276 | #define DQ_LASTSET_B 6 /* Following 6 bits (see QIF_) are reserved\ |
277 | * for the mask of entries set via SETQUOTA\ | |
278 | * quotactl. They are set under dq_data_lock\ | |
279 | * and the quota format handling dquot can\ | |
280 | * clear them when it sees fit. */ | |
1da177e4 LT |
281 | |
282 | struct dquot { | |
283 | struct hlist_node dq_hash; /* Hash list in memory */ | |
284 | struct list_head dq_inuse; /* List of all quotas */ | |
285 | struct list_head dq_free; /* Free list element */ | |
286 | struct list_head dq_dirty; /* List of dirty dquots */ | |
d3be915f | 287 | struct mutex dq_lock; /* dquot IO lock */ |
1da177e4 LT |
288 | atomic_t dq_count; /* Use count */ |
289 | wait_queue_head_t dq_wait_unused; /* Wait queue for dquot to become unused */ | |
290 | struct super_block *dq_sb; /* superblock this applies to */ | |
4c376dca | 291 | struct kqid dq_id; /* ID this applies to (uid, gid, projid) */ |
1da177e4 LT |
292 | loff_t dq_off; /* Offset of dquot on disk */ |
293 | unsigned long dq_flags; /* See DQ_* */ | |
1da177e4 LT |
294 | struct mem_dqblk dq_dqb; /* Diskquota usage */ |
295 | }; | |
296 | ||
1da177e4 LT |
297 | /* Operations which must be implemented by each quota format */ |
298 | struct quota_format_ops { | |
299 | int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */ | |
300 | int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */ | |
301 | int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */ | |
302 | int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */ | |
303 | int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */ | |
304 | int (*commit_dqblk)(struct dquot *dquot); /* Write structure for one user */ | |
305 | int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */ | |
306 | }; | |
307 | ||
308 | /* Operations working with dquots */ | |
309 | struct dquot_operations { | |
1da177e4 | 310 | int (*write_dquot) (struct dquot *); /* Ordinary dquot write */ |
74f783af JK |
311 | struct dquot *(*alloc_dquot)(struct super_block *, int); /* Allocate memory for new dquot */ |
312 | void (*destroy_dquot)(struct dquot *); /* Free memory for dquot */ | |
1da177e4 LT |
313 | int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */ |
314 | int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */ | |
315 | int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */ | |
316 | int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */ | |
fd8fbfc1 DM |
317 | /* get reserved quota for delayed alloc, value returned is managed by |
318 | * quota code only */ | |
319 | qsize_t *(*get_reserved_space) (struct inode *); | |
1da177e4 LT |
320 | }; |
321 | ||
f00c9e44 JK |
322 | struct path; |
323 | ||
14bf61ff JK |
324 | /* Structure for communicating via ->get_dqblk() & ->set_dqblk() */ |
325 | struct qc_dqblk { | |
326 | int d_fieldmask; /* mask of fields to change in ->set_dqblk() */ | |
327 | u64 d_spc_hardlimit; /* absolute limit on used space */ | |
328 | u64 d_spc_softlimit; /* preferred limit on used space */ | |
329 | u64 d_ino_hardlimit; /* maximum # allocated inodes */ | |
330 | u64 d_ino_softlimit; /* preferred inode limit */ | |
331 | u64 d_space; /* Space owned by the user */ | |
332 | u64 d_ino_count; /* # inodes owned by the user */ | |
333 | s64 d_ino_timer; /* zero if within inode limits */ | |
334 | /* if not, we refuse service */ | |
335 | s64 d_spc_timer; /* similar to above; for space */ | |
336 | int d_ino_warns; /* # warnings issued wrt num inodes */ | |
337 | int d_spc_warns; /* # warnings issued wrt used space */ | |
338 | u64 d_rt_spc_hardlimit; /* absolute limit on realtime space */ | |
339 | u64 d_rt_spc_softlimit; /* preferred limit on RT space */ | |
340 | u64 d_rt_space; /* realtime space owned */ | |
341 | s64 d_rt_spc_timer; /* similar to above; for RT space */ | |
342 | int d_rt_spc_warns; /* # warnings issued wrt RT space */ | |
343 | }; | |
344 | ||
345 | /* Field specifiers for ->set_dqblk() in struct qc_dqblk */ | |
346 | #define QC_INO_SOFT (1<<0) | |
347 | #define QC_INO_HARD (1<<1) | |
348 | #define QC_SPC_SOFT (1<<2) | |
349 | #define QC_SPC_HARD (1<<3) | |
350 | #define QC_RT_SPC_SOFT (1<<4) | |
351 | #define QC_RT_SPC_HARD (1<<5) | |
352 | #define QC_LIMIT_MASK (QC_INO_SOFT | QC_INO_HARD | QC_SPC_SOFT | QC_SPC_HARD | \ | |
353 | QC_RT_SPC_SOFT | QC_RT_SPC_HARD) | |
354 | #define QC_SPC_TIMER (1<<6) | |
355 | #define QC_INO_TIMER (1<<7) | |
356 | #define QC_RT_SPC_TIMER (1<<8) | |
357 | #define QC_TIMER_MASK (QC_SPC_TIMER | QC_INO_TIMER | QC_RT_SPC_TIMER) | |
358 | #define QC_SPC_WARNS (1<<9) | |
359 | #define QC_INO_WARNS (1<<10) | |
360 | #define QC_RT_SPC_WARNS (1<<11) | |
361 | #define QC_WARNS_MASK (QC_SPC_WARNS | QC_INO_WARNS | QC_RT_SPC_WARNS) | |
362 | #define QC_SPACE (1<<12) | |
363 | #define QC_INO_COUNT (1<<13) | |
364 | #define QC_RT_SPACE (1<<14) | |
365 | #define QC_ACCT_MASK (QC_SPACE | QC_INO_COUNT | QC_RT_SPACE) | |
366 | ||
1da177e4 LT |
367 | /* Operations handling requests from userspace */ |
368 | struct quotactl_ops { | |
f00c9e44 JK |
369 | int (*quota_on)(struct super_block *, int, int, struct path *); |
370 | int (*quota_on_meta)(struct super_block *, int, int); | |
307ae18a | 371 | int (*quota_off)(struct super_block *, int); |
ceed1723 | 372 | int (*quota_sync)(struct super_block *, int); |
1da177e4 LT |
373 | int (*get_info)(struct super_block *, int, struct if_dqinfo *); |
374 | int (*set_info)(struct super_block *, int, struct if_dqinfo *); | |
14bf61ff JK |
375 | int (*get_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *); |
376 | int (*set_dqblk)(struct super_block *, struct kqid, struct qc_dqblk *); | |
1da177e4 LT |
377 | int (*get_xstate)(struct super_block *, struct fs_quota_stat *); |
378 | int (*set_xstate)(struct super_block *, unsigned int, int); | |
af30cb44 | 379 | int (*get_xstatev)(struct super_block *, struct fs_quota_statv *); |
9da93f9b | 380 | int (*rm_xquota)(struct super_block *, unsigned int); |
1da177e4 LT |
381 | }; |
382 | ||
383 | struct quota_format_type { | |
384 | int qf_fmt_id; /* Quota format id */ | |
1472da5f | 385 | const struct quota_format_ops *qf_ops; /* Operations of format */ |
1da177e4 LT |
386 | struct module *qf_owner; /* Module implementing quota format */ |
387 | struct quota_format_type *qf_next; | |
388 | }; | |
389 | ||
f55abc0f JK |
390 | /* Quota state flags - they actually come in two flavors - for users and groups */ |
391 | enum { | |
392 | _DQUOT_USAGE_ENABLED = 0, /* Track disk usage for users */ | |
393 | _DQUOT_LIMITS_ENABLED, /* Enforce quota limits for users */ | |
394 | _DQUOT_SUSPENDED, /* User diskquotas are off, but | |
0ff5af83 JK |
395 | * we have necessary info in |
396 | * memory to turn them on */ | |
f55abc0f JK |
397 | _DQUOT_STATE_FLAGS |
398 | }; | |
399 | #define DQUOT_USAGE_ENABLED (1 << _DQUOT_USAGE_ENABLED) | |
400 | #define DQUOT_LIMITS_ENABLED (1 << _DQUOT_LIMITS_ENABLED) | |
401 | #define DQUOT_SUSPENDED (1 << _DQUOT_SUSPENDED) | |
402 | #define DQUOT_STATE_FLAGS (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED | \ | |
403 | DQUOT_SUSPENDED) | |
ca785ec6 | 404 | /* Other quota flags */ |
ad1e6e8d DM |
405 | #define DQUOT_STATE_LAST (_DQUOT_STATE_FLAGS * MAXQUOTAS) |
406 | #define DQUOT_QUOTA_SYS_FILE (1 << DQUOT_STATE_LAST) | |
407 | /* Quota file is a special | |
ca785ec6 JK |
408 | * system file and user cannot |
409 | * touch it. Filesystem is | |
410 | * responsible for setting | |
411 | * S_NOQUOTA, S_NOATIME flags | |
412 | */ | |
ad1e6e8d DM |
413 | #define DQUOT_NEGATIVE_USAGE (1 << (DQUOT_STATE_LAST + 1)) |
414 | /* Allow negative quota usage */ | |
f55abc0f JK |
415 | |
416 | static inline unsigned int dquot_state_flag(unsigned int flags, int type) | |
417 | { | |
ad1e6e8d | 418 | return flags << _DQUOT_STATE_FLAGS * type; |
f55abc0f JK |
419 | } |
420 | ||
421 | static inline unsigned int dquot_generic_flag(unsigned int flags, int type) | |
422 | { | |
ad1e6e8d | 423 | return (flags >> _DQUOT_STATE_FLAGS * type) & DQUOT_STATE_FLAGS; |
f55abc0f | 424 | } |
1da177e4 | 425 | |
86e931a3 | 426 | #ifdef CONFIG_QUOTA_NETLINK_INTERFACE |
431f1974 | 427 | extern void quota_send_warning(struct kqid qid, dev_t dev, |
86e931a3 SW |
428 | const char warntype); |
429 | #else | |
431f1974 | 430 | static inline void quota_send_warning(struct kqid qid, dev_t dev, |
86e931a3 SW |
431 | const char warntype) |
432 | { | |
433 | return; | |
434 | } | |
435 | #endif /* CONFIG_QUOTA_NETLINK_INTERFACE */ | |
436 | ||
1da177e4 LT |
437 | struct quota_info { |
438 | unsigned int flags; /* Flags for diskquotas on this device */ | |
d3be915f IM |
439 | struct mutex dqio_mutex; /* lock device while I/O in progress */ |
440 | struct mutex dqonoff_mutex; /* Serialize quotaon & quotaoff */ | |
1da177e4 | 441 | struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */ |
1da177e4 | 442 | struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */ |
1472da5f | 443 | const struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */ |
1da177e4 LT |
444 | }; |
445 | ||
1da177e4 LT |
446 | int register_quota_format(struct quota_format_type *fmt); |
447 | void unregister_quota_format(struct quota_format_type *fmt); | |
448 | ||
449 | struct quota_module_name { | |
450 | int qm_fmt_id; | |
451 | char *qm_mod_name; | |
452 | }; | |
453 | ||
454 | #define INIT_QUOTA_MODULE_NAMES {\ | |
455 | {QFMT_VFS_OLD, "quota_v1"},\ | |
456 | {QFMT_VFS_V0, "quota_v2"},\ | |
c3ad83d9 | 457 | {QFMT_VFS_V1, "quota_v2"},\ |
1da177e4 LT |
458 | {0, NULL}} |
459 | ||
1da177e4 | 460 | #endif /* _QUOTA_ */ |