~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/quotaops.h

Version: ~ [ linux-4.18 ] ~ [ linux-4.17.14 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.62 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.119 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.147 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.118 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.57 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.27.62 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~ [ linux-next-20180810 ] ~ [ linux-next-20180813 ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * Definitions for diskquota-operations. When diskquota is configured these
  4  * macros expand to the right source-code.
  5  *
  6  * Author:  Marco van Wieringen <mvw@planets.elm.net>
  7  */
  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 
 17 static inline struct quota_info *sb_dqopt(struct super_block *sb)
 18 {
 19         return &sb->s_dquot;
 20 }
 21 
 22 /* i_mutex must being held */
 23 static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
 24 {
 25         return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_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 
 30 int 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 
 38 extern __printf(3, 4)
 39 void __quota_error(struct super_block *sb, const char *func,
 40                    const char *fmt, ...);
 41 
 42 /*
 43  * declaration of quota_function calls in kernel.
 44  */
 45 int dquot_initialize(struct inode *inode);
 46 bool dquot_initialize_needed(struct inode *inode);
 47 void dquot_drop(struct inode *inode);
 48 struct dquot *dqget(struct super_block *sb, struct kqid qid);
 49 static inline struct dquot *dqgrab(struct dquot *dquot)
 50 {
 51         /* Make sure someone else has active reference to dquot */
 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 void dqput(struct dquot *dquot);
 58 int dquot_scan_active(struct super_block *sb,
 59                       int (*fn)(struct dquot *dquot, unsigned long priv),
 60                       unsigned long priv);
 61 struct dquot *dquot_alloc(struct super_block *sb, int type);
 62 void dquot_destroy(struct dquot *dquot);
 63 
 64 int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
 65 void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
 66 
 67 int dquot_alloc_inode(struct inode *inode);
 68 
 69 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
 70 void dquot_free_inode(struct inode *inode);
 71 void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
 72 
 73 int dquot_disable(struct super_block *sb, int type, unsigned int flags);
 74 /* Suspend quotas on remount RO */
 75 static inline int dquot_suspend(struct super_block *sb, int type)
 76 {
 77         return dquot_disable(sb, type, DQUOT_SUSPENDED);
 78 }
 79 int dquot_resume(struct super_block *sb, int type);
 80 
 81 int dquot_commit(struct dquot *dquot);
 82 int dquot_acquire(struct dquot *dquot);
 83 int dquot_release(struct dquot *dquot);
 84 int dquot_commit_info(struct super_block *sb, int type);
 85 int dquot_get_next_id(struct super_block *sb, struct kqid *qid);
 86 int dquot_mark_dquot_dirty(struct dquot *dquot);
 87 
 88 int dquot_file_open(struct inode *inode, struct file *file);
 89 
 90 int dquot_enable(struct inode *inode, int type, int format_id,
 91         unsigned int flags);
 92 int dquot_quota_on(struct super_block *sb, int type, int format_id,
 93         const struct path *path);
 94 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
 95         int format_id, int type);
 96 int dquot_quota_off(struct super_block *sb, int type);
 97 int dquot_writeback_dquots(struct super_block *sb, int type);
 98 int dquot_quota_sync(struct super_block *sb, int type);
 99 int dquot_get_state(struct super_block *sb, struct qc_state *state);
100 int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
101 int dquot_get_dqblk(struct super_block *sb, struct kqid id,
102                 struct qc_dqblk *di);
103 int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id,
104                 struct qc_dqblk *di);
105 int dquot_set_dqblk(struct super_block *sb, struct kqid id,
106                 struct qc_dqblk *di);
107 
108 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
109 int dquot_transfer(struct inode *inode, struct iattr *iattr);
110 
111 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
112 {
113         return sb_dqopt(sb)->info + type;
114 }
115 
116 /*
117  * Functions for checking status of quota
118  */
119 
120 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
121 {
122         return sb_dqopt(sb)->flags &
123                                 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
124 }
125 
126 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
127 {
128         return sb_dqopt(sb)->flags &
129                                 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
130 }
131 
132 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
133 {
134         return sb_dqopt(sb)->flags &
135                                 dquot_state_flag(DQUOT_SUSPENDED, type);
136 }
137 
138 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
139 {
140         return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
141 }
142 
143 /* Does kernel know about any quota information for given sb + type? */
144 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
145 {
146         /* Currently if anything is on, then quota usage is on as well */
147         return sb_has_quota_usage_enabled(sb, type);
148 }
149 
150 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
151 {
152         return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
153 }
154 
155 static inline bool sb_has_quota_active(struct super_block *sb, int type)
156 {
157         return sb_has_quota_loaded(sb, type) &&
158                !sb_has_quota_suspended(sb, type);
159 }
160 
161 /*
162  * Operations supported for diskquotas.
163  */
164 extern const struct dquot_operations dquot_operations;
165 extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
166 
167 #else
168 
169 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
170 {
171         return 0;
172 }
173 
174 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
175 {
176         return 0;
177 }
178 
179 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
180 {
181         return 0;
182 }
183 
184 static inline int sb_any_quota_suspended(struct super_block *sb)
185 {
186         return 0;
187 }
188 
189 /* Does kernel know about any quota information for given sb + type? */
190 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
191 {
192         return 0;
193 }
194 
195 static inline int sb_any_quota_loaded(struct super_block *sb)
196 {
197         return 0;
198 }
199 
200 static inline int sb_has_quota_active(struct super_block *sb, int type)
201 {
202         return 0;
203 }
204 
205 static inline int dquot_initialize(struct inode *inode)
206 {
207         return 0;
208 }
209 
210 static inline bool dquot_initialize_needed(struct inode *inode)
211 {
212         return false;
213 }
214 
215 static inline void dquot_drop(struct inode *inode)
216 {
217 }
218 
219 static inline int dquot_alloc_inode(struct inode *inode)
220 {
221         return 0;
222 }
223 
224 static inline void dquot_free_inode(struct inode *inode)
225 {
226 }
227 
228 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
229 {
230         return 0;
231 }
232 
233 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
234                 int flags)
235 {
236         if (!(flags & DQUOT_SPACE_RESERVE))
237                 inode_add_bytes(inode, number);
238         return 0;
239 }
240 
241 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
242                 int flags)
243 {
244         if (!(flags & DQUOT_SPACE_RESERVE))
245                 inode_sub_bytes(inode, number);
246 }
247 
248 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
249 {
250         inode_add_bytes(inode, number);
251         return 0;
252 }
253 
254 static inline int dquot_reclaim_space_nodirty(struct inode *inode,
255                                               qsize_t number)
256 {
257         inode_sub_bytes(inode, number);
258         return 0;
259 }
260 
261 static inline int dquot_disable(struct super_block *sb, int type,
262                 unsigned int flags)
263 {
264         return 0;
265 }
266 
267 static inline int dquot_suspend(struct super_block *sb, int type)
268 {
269         return 0;
270 }
271 
272 static inline int dquot_resume(struct super_block *sb, int type)
273 {
274         return 0;
275 }
276 
277 #define dquot_file_open         generic_file_open
278 
279 static inline int dquot_writeback_dquots(struct super_block *sb, int type)
280 {
281         return 0;
282 }
283 
284 #endif /* CONFIG_QUOTA */
285 
286 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
287 {
288         return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
289 }
290 
291 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
292 {
293         __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
294         mark_inode_dirty_sync(inode);
295 }
296 
297 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
298 {
299         int ret;
300 
301         ret = dquot_alloc_space_nodirty(inode, nr);
302         if (!ret) {
303                 /*
304                  * Mark inode fully dirty. Since we are allocating blocks, inode
305                  * would become fully dirty soon anyway and it reportedly
306                  * reduces lock contention.
307                  */
308                 mark_inode_dirty(inode);
309         }
310         return ret;
311 }
312 
313 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
314 {
315         return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
316 }
317 
318 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
319 {
320         dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
321 }
322 
323 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
324 {
325         return dquot_alloc_space(inode, nr << inode->i_blkbits);
326 }
327 
328 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
329 {
330         return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
331 }
332 
333 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
334 {
335         int ret;
336 
337         ret = dquot_prealloc_block_nodirty(inode, nr);
338         if (!ret)
339                 mark_inode_dirty_sync(inode);
340         return ret;
341 }
342 
343 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
344 {
345         return __dquot_alloc_space(inode, nr << inode->i_blkbits,
346                                 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
347 }
348 
349 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
350 {
351         int ret;
352 
353         ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
354         if (!ret)
355                 mark_inode_dirty_sync(inode);
356         return ret;
357 }
358 
359 static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
360 {
361         dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
362         mark_inode_dirty_sync(inode);
363 }
364 
365 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
366 {
367         __dquot_free_space(inode, nr, 0);
368 }
369 
370 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
371 {
372         dquot_free_space_nodirty(inode, nr);
373         mark_inode_dirty_sync(inode);
374 }
375 
376 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
377 {
378         dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
379 }
380 
381 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
382 {
383         dquot_free_space(inode, nr << inode->i_blkbits);
384 }
385 
386 static inline void dquot_release_reservation_block(struct inode *inode,
387                 qsize_t nr)
388 {
389         __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
390 }
391 
392 unsigned int qtype_enforce_flag(int type);
393 
394 #endif /* _LINUX_QUOTAOPS_ */
395 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp