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8#ifndef _LINUX_QUOTAOPS_
9#define _LINUX_QUOTAOPS_
10
11#include <linux/fs.h>
12
13#define DQUOT_SPACE_WARN 0x1
14#define DQUOT_SPACE_RESERVE 0x2
15#define DQUOT_SPACE_NOFAIL 0x4
16
17static inline struct quota_info *sb_dqopt(struct super_block *sb)
18{
19 return &sb->s_dquot;
20}
21
22
23static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
24{
25 return (ia->ia_valid & ATTR_SIZE) ||
26 (ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) ||
27 (ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid));
28}
29
30int kernel_quotactl(unsigned int cmd, const char __user *special,
31 qid_t id, void __user *addr);
32
33#if defined(CONFIG_QUOTA)
34
35#define quota_error(sb, fmt, args...) \
36 __quota_error((sb), __func__, fmt , ## args)
37
38extern __printf(3, 4)
39void __quota_error(struct super_block *sb, const char *func,
40 const char *fmt, ...);
41
42
43
44
45int dquot_initialize(struct inode *inode);
46bool dquot_initialize_needed(struct inode *inode);
47void dquot_drop(struct inode *inode);
48struct dquot *dqget(struct super_block *sb, struct kqid qid);
49static inline struct dquot *dqgrab(struct dquot *dquot)
50{
51
52 WARN_ON_ONCE(!atomic_read(&dquot->dq_count));
53 WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags));
54 atomic_inc(&dquot->dq_count);
55 return dquot;
56}
57
58static inline bool dquot_is_busy(struct dquot *dquot)
59{
60 if (test_bit(DQ_MOD_B, &dquot->dq_flags))
61 return true;
62 if (atomic_read(&dquot->dq_count) > 1)
63 return true;
64 return false;
65}
66
67void dqput(struct dquot *dquot);
68int dquot_scan_active(struct super_block *sb,
69 int (*fn)(struct dquot *dquot, unsigned long priv),
70 unsigned long priv);
71struct dquot *dquot_alloc(struct super_block *sb, int type);
72void dquot_destroy(struct dquot *dquot);
73
74int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
75void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
76
77int dquot_alloc_inode(struct inode *inode);
78
79int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
80void dquot_free_inode(struct inode *inode);
81void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
82
83int dquot_disable(struct super_block *sb, int type, unsigned int flags);
84
85static inline int dquot_suspend(struct super_block *sb, int type)
86{
87 return dquot_disable(sb, type, DQUOT_SUSPENDED);
88}
89int dquot_resume(struct super_block *sb, int type);
90
91int dquot_commit(struct dquot *dquot);
92int dquot_acquire(struct dquot *dquot);
93int dquot_release(struct dquot *dquot);
94int dquot_commit_info(struct super_block *sb, int type);
95int dquot_get_next_id(struct super_block *sb, struct kqid *qid);
96int dquot_mark_dquot_dirty(struct dquot *dquot);
97
98int dquot_file_open(struct inode *inode, struct file *file);
99
100int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
101 unsigned int flags);
102int dquot_load_quota_inode(struct inode *inode, int type, int format_id,
103 unsigned int flags);
104int dquot_quota_on(struct super_block *sb, int type, int format_id,
105 const struct path *path);
106int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
107 int format_id, int type);
108int dquot_quota_off(struct super_block *sb, int type);
109int dquot_writeback_dquots(struct super_block *sb, int type);
110int dquot_quota_sync(struct super_block *sb, int type);
111int dquot_get_state(struct super_block *sb, struct qc_state *state);
112int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
113int dquot_get_dqblk(struct super_block *sb, struct kqid id,
114 struct qc_dqblk *di);
115int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id,
116 struct qc_dqblk *di);
117int dquot_set_dqblk(struct super_block *sb, struct kqid id,
118 struct qc_dqblk *di);
119
120int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
121int dquot_transfer(struct inode *inode, struct iattr *iattr);
122
123static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
124{
125 return sb_dqopt(sb)->info + type;
126}
127
128
129
130
131
132static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
133{
134 return sb_dqopt(sb)->flags &
135 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
136}
137
138static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
139{
140 return sb_dqopt(sb)->flags &
141 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
142}
143
144static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
145{
146 return sb_dqopt(sb)->flags &
147 dquot_state_flag(DQUOT_SUSPENDED, type);
148}
149
150static inline unsigned sb_any_quota_suspended(struct super_block *sb)
151{
152 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
153}
154
155
156static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
157{
158
159 return sb_has_quota_usage_enabled(sb, type);
160}
161
162static inline unsigned sb_any_quota_loaded(struct super_block *sb)
163{
164 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
165}
166
167static inline bool sb_has_quota_active(struct super_block *sb, int type)
168{
169 return sb_has_quota_loaded(sb, type) &&
170 !sb_has_quota_suspended(sb, type);
171}
172
173
174
175
176extern const struct dquot_operations dquot_operations;
177extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
178
179#else
180
181static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
182{
183 return 0;
184}
185
186static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
187{
188 return 0;
189}
190
191static inline int sb_has_quota_suspended(struct super_block *sb, int type)
192{
193 return 0;
194}
195
196static inline int sb_any_quota_suspended(struct super_block *sb)
197{
198 return 0;
199}
200
201
202static inline int sb_has_quota_loaded(struct super_block *sb, int type)
203{
204 return 0;
205}
206
207static inline int sb_any_quota_loaded(struct super_block *sb)
208{
209 return 0;
210}
211
212static inline int sb_has_quota_active(struct super_block *sb, int type)
213{
214 return 0;
215}
216
217static inline int dquot_initialize(struct inode *inode)
218{
219 return 0;
220}
221
222static inline bool dquot_initialize_needed(struct inode *inode)
223{
224 return false;
225}
226
227static inline void dquot_drop(struct inode *inode)
228{
229}
230
231static inline int dquot_alloc_inode(struct inode *inode)
232{
233 return 0;
234}
235
236static inline void dquot_free_inode(struct inode *inode)
237{
238}
239
240static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
241{
242 return 0;
243}
244
245static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
246 int flags)
247{
248 if (!(flags & DQUOT_SPACE_RESERVE))
249 inode_add_bytes(inode, number);
250 return 0;
251}
252
253static inline void __dquot_free_space(struct inode *inode, qsize_t number,
254 int flags)
255{
256 if (!(flags & DQUOT_SPACE_RESERVE))
257 inode_sub_bytes(inode, number);
258}
259
260static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
261{
262 inode_add_bytes(inode, number);
263 return 0;
264}
265
266static inline int dquot_reclaim_space_nodirty(struct inode *inode,
267 qsize_t number)
268{
269 inode_sub_bytes(inode, number);
270 return 0;
271}
272
273static inline int dquot_disable(struct super_block *sb, int type,
274 unsigned int flags)
275{
276 return 0;
277}
278
279static inline int dquot_suspend(struct super_block *sb, int type)
280{
281 return 0;
282}
283
284static inline int dquot_resume(struct super_block *sb, int type)
285{
286 return 0;
287}
288
289#define dquot_file_open generic_file_open
290
291static inline int dquot_writeback_dquots(struct super_block *sb, int type)
292{
293 return 0;
294}
295
296#endif
297
298static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
299{
300 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
301}
302
303static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
304{
305 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
306 mark_inode_dirty_sync(inode);
307}
308
309static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
310{
311 int ret;
312
313 ret = dquot_alloc_space_nodirty(inode, nr);
314 if (!ret) {
315
316
317
318
319
320 mark_inode_dirty(inode);
321 }
322 return ret;
323}
324
325static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
326{
327 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
328}
329
330static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
331{
332 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
333}
334
335static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
336{
337 return dquot_alloc_space(inode, nr << inode->i_blkbits);
338}
339
340static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
341{
342 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
343}
344
345static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
346{
347 int ret;
348
349 ret = dquot_prealloc_block_nodirty(inode, nr);
350 if (!ret)
351 mark_inode_dirty_sync(inode);
352 return ret;
353}
354
355static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
356{
357 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
358 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
359}
360
361static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
362{
363 int ret;
364
365 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
366 if (!ret)
367 mark_inode_dirty_sync(inode);
368 return ret;
369}
370
371static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
372{
373 dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
374 mark_inode_dirty_sync(inode);
375}
376
377static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
378{
379 __dquot_free_space(inode, nr, 0);
380}
381
382static inline void dquot_free_space(struct inode *inode, qsize_t nr)
383{
384 dquot_free_space_nodirty(inode, nr);
385 mark_inode_dirty_sync(inode);
386}
387
388static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
389{
390 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
391}
392
393static inline void dquot_free_block(struct inode *inode, qsize_t nr)
394{
395 dquot_free_space(inode, nr << inode->i_blkbits);
396}
397
398static inline void dquot_release_reservation_block(struct inode *inode,
399 qsize_t nr)
400{
401 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
402}
403
404unsigned int qtype_enforce_flag(int type);
405
406#endif
407