Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Definitions for diskquota-operations. When diskquota is configured these | |
3 | * macros expand to the right source-code. | |
4 | * | |
5 | * Author: Marco van Wieringen <mvw@planets.elm.net> | |
1da177e4 LT |
6 | */ |
7 | #ifndef _LINUX_QUOTAOPS_ | |
8 | #define _LINUX_QUOTAOPS_ | |
9 | ||
1da177e4 LT |
10 | #include <linux/fs.h> |
11 | ||
56246f9a ES |
12 | #define DQUOT_SPACE_WARN 0x1 |
13 | #define DQUOT_SPACE_RESERVE 0x2 | |
0e05842b | 14 | #define DQUOT_SPACE_NOFAIL 0x4 |
56246f9a | 15 | |
03b06343 JK |
16 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
17 | { | |
18 | return &sb->s_dquot; | |
19 | } | |
74abb989 | 20 | |
12755627 DM |
21 | /* i_mutex must being held */ |
22 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
23 | { | |
24 | return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || | |
25 | (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) || | |
26 | (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid); | |
27 | } | |
28 | ||
1da177e4 LT |
29 | #if defined(CONFIG_QUOTA) |
30 | ||
31 | /* | |
32 | * declaration of quota_function calls in kernel. | |
33 | */ | |
c469070a DM |
34 | void inode_add_rsv_space(struct inode *inode, qsize_t number); |
35 | void inode_claim_rsv_space(struct inode *inode, qsize_t number); | |
36 | void inode_sub_rsv_space(struct inode *inode, qsize_t number); | |
37 | ||
871a2931 | 38 | void dquot_initialize(struct inode *inode); |
9f754758 | 39 | void dquot_drop(struct inode *inode); |
3d9ea253 JK |
40 | struct dquot *dqget(struct super_block *sb, unsigned int id, int type); |
41 | void dqput(struct dquot *dquot); | |
12c77527 JK |
42 | int dquot_scan_active(struct super_block *sb, |
43 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
44 | unsigned long priv); | |
7d9056ba JK |
45 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
46 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 47 | |
56246f9a ES |
48 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
49 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 50 | |
63936dda | 51 | int dquot_alloc_inode(const struct inode *inode); |
740d9dcd | 52 | |
5dd4056d | 53 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
63936dda | 54 | void dquot_free_inode(const struct inode *inode); |
b85f4b87 | 55 | |
b85f4b87 JK |
56 | int dquot_commit(struct dquot *dquot); |
57 | int dquot_acquire(struct dquot *dquot); | |
58 | int dquot_release(struct dquot *dquot); | |
59 | int dquot_commit_info(struct super_block *sb, int type); | |
60 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
61 | ||
907f4554 CH |
62 | int dquot_file_open(struct inode *inode, struct file *file); |
63 | ||
b85f4b87 JK |
64 | int vfs_quota_on(struct super_block *sb, int type, int format_id, |
65 | char *path, int remount); | |
f55abc0f JK |
66 | int vfs_quota_enable(struct inode *inode, int type, int format_id, |
67 | unsigned int flags); | |
77e69dac AV |
68 | int vfs_quota_on_path(struct super_block *sb, int type, int format_id, |
69 | struct path *path); | |
b85f4b87 JK |
70 | int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
71 | int format_id, int type); | |
72 | int vfs_quota_off(struct super_block *sb, int type, int remount); | |
f55abc0f | 73 | int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags); |
5fb324ad | 74 | int vfs_quota_sync(struct super_block *sb, int type, int wait); |
b85f4b87 JK |
75 | int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
76 | int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
b9b2dd36 CH |
77 | int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, |
78 | struct fs_disk_quota *di); | |
c472b432 CH |
79 | int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, |
80 | struct fs_disk_quota *di); | |
b85f4b87 | 81 | |
bc8e5f07 | 82 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 83 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
b85f4b87 | 84 | int vfs_dq_quota_on_remount(struct super_block *sb); |
1da177e4 | 85 | |
03b06343 JK |
86 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
87 | { | |
88 | return sb_dqopt(sb)->info + type; | |
89 | } | |
74abb989 JK |
90 | |
91 | /* | |
92 | * Functions for checking status of quota | |
93 | */ | |
94 | ||
ad1e6e8d | 95 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 96 | { |
f55abc0f JK |
97 | return sb_dqopt(sb)->flags & |
98 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 99 | } |
74abb989 | 100 | |
ad1e6e8d | 101 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 102 | { |
f55abc0f JK |
103 | return sb_dqopt(sb)->flags & |
104 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 105 | } |
74abb989 | 106 | |
ad1e6e8d | 107 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 108 | { |
f55abc0f JK |
109 | return sb_dqopt(sb)->flags & |
110 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 111 | } |
74abb989 | 112 | |
ad1e6e8d | 113 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 114 | { |
ad1e6e8d DM |
115 | unsigned type, tmsk = 0; |
116 | for (type = 0; type < MAXQUOTAS; type++) | |
117 | tmsk |= sb_has_quota_suspended(sb, type) << type; | |
118 | return tmsk; | |
03b06343 | 119 | } |
74abb989 | 120 | |
f55abc0f | 121 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 122 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
123 | { |
124 | /* Currently if anything is on, then quota usage is on as well */ | |
125 | return sb_has_quota_usage_enabled(sb, type); | |
126 | } | |
127 | ||
ad1e6e8d | 128 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 129 | { |
ad1e6e8d DM |
130 | unsigned type, tmsk = 0; |
131 | for (type = 0; type < MAXQUOTAS; type++) | |
132 | tmsk |= sb_has_quota_loaded(sb, type) << type; | |
133 | return tmsk; | |
f55abc0f JK |
134 | } |
135 | ||
ad1e6e8d | 136 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
137 | { |
138 | return sb_has_quota_loaded(sb, type) && | |
139 | !sb_has_quota_suspended(sb, type); | |
140 | } | |
141 | ||
ad1e6e8d | 142 | static inline unsigned sb_any_quota_active(struct super_block *sb) |
f55abc0f | 143 | { |
ad1e6e8d | 144 | return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb); |
f55abc0f JK |
145 | } |
146 | ||
1da177e4 LT |
147 | /* |
148 | * Operations supported for diskquotas. | |
149 | */ | |
61e225dc | 150 | extern const struct dquot_operations dquot_operations; |
0d54b217 | 151 | extern const struct quotactl_ops vfs_quotactl_ops; |
1da177e4 LT |
152 | |
153 | #define sb_dquot_ops (&dquot_operations) | |
154 | #define sb_quotactl_ops (&vfs_quotactl_ops) | |
155 | ||
850b201b | 156 | /* Cannot be called inside a transaction */ |
b85f4b87 | 157 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
1da177e4 LT |
158 | { |
159 | int ret = -ENOSYS; | |
160 | ||
0ff5af83 JK |
161 | if (sb->s_qcop && sb->s_qcop->quota_off) |
162 | ret = sb->s_qcop->quota_off(sb, -1, remount); | |
163 | return ret; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | #else |
167 | ||
f55abc0f | 168 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
169 | { |
170 | return 0; | |
171 | } | |
172 | ||
f55abc0f | 173 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
174 | { |
175 | return 0; | |
176 | } | |
177 | ||
178 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
179 | { | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
184 | { | |
185 | return 0; | |
186 | } | |
74abb989 | 187 | |
f55abc0f JK |
188 | /* Does kernel know about any quota information for given sb + type? */ |
189 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
190 | { | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
195 | { | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static inline int sb_any_quota_active(struct super_block *sb) | |
205 | { | |
206 | return 0; | |
207 | } | |
208 | ||
1da177e4 LT |
209 | /* |
210 | * NO-OP when quota not configured. | |
211 | */ | |
212 | #define sb_dquot_ops (NULL) | |
213 | #define sb_quotactl_ops (NULL) | |
50f8c370 | 214 | |
871a2931 | 215 | static inline void dquot_initialize(struct inode *inode) |
50f8c370 AM |
216 | { |
217 | } | |
218 | ||
9f754758 | 219 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
220 | { |
221 | } | |
222 | ||
63936dda | 223 | static inline int dquot_alloc_inode(const struct inode *inode) |
50f8c370 AM |
224 | { |
225 | return 0; | |
226 | } | |
227 | ||
63936dda | 228 | static inline void dquot_free_inode(const struct inode *inode) |
50f8c370 AM |
229 | { |
230 | } | |
231 | ||
b85f4b87 | 232 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
50f8c370 AM |
233 | { |
234 | return 0; | |
235 | } | |
236 | ||
b85f4b87 | 237 | static inline int vfs_dq_quota_on_remount(struct super_block *sb) |
50f8c370 AM |
238 | { |
239 | return 0; | |
240 | } | |
241 | ||
b43fa828 | 242 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
243 | { |
244 | return 0; | |
245 | } | |
246 | ||
5dd4056d | 247 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 248 | int flags) |
1da177e4 | 249 | { |
56246f9a | 250 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 251 | inode_add_bytes(inode, number); |
1da177e4 LT |
252 | return 0; |
253 | } | |
254 | ||
5dd4056d | 255 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 256 | int flags) |
1da177e4 | 257 | { |
56246f9a | 258 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 259 | inode_sub_bytes(inode, number); |
1da177e4 LT |
260 | } |
261 | ||
5dd4056d | 262 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 263 | { |
5dd4056d | 264 | inode_add_bytes(inode, number); |
1da177e4 LT |
265 | return 0; |
266 | } | |
267 | ||
871a2931 CH |
268 | #define dquot_file_open generic_file_open |
269 | ||
5dd4056d CH |
270 | #endif /* CONFIG_QUOTA */ |
271 | ||
272 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 273 | { |
56246f9a | 274 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
275 | } |
276 | ||
0e05842b ES |
277 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
278 | { | |
279 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
280 | mark_inode_dirty(inode); | |
1da177e4 LT |
281 | } |
282 | ||
5dd4056d | 283 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 284 | { |
5dd4056d CH |
285 | int ret; |
286 | ||
287 | ret = dquot_alloc_space_nodirty(inode, nr); | |
288 | if (!ret) | |
289 | mark_inode_dirty(inode); | |
290 | return ret; | |
f18df228 MC |
291 | } |
292 | ||
5dd4056d | 293 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 294 | { |
5dd4056d | 295 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
296 | } |
297 | ||
0e05842b ES |
298 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
299 | { | |
300 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
301 | } | |
302 | ||
5dd4056d | 303 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 304 | { |
5dd4056d | 305 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
306 | } |
307 | ||
5dd4056d | 308 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 309 | { |
56246f9a | 310 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
311 | } |
312 | ||
5dd4056d | 313 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 314 | { |
5dd4056d | 315 | int ret; |
1da177e4 | 316 | |
5dd4056d CH |
317 | ret = dquot_prealloc_block_nodirty(inode, nr); |
318 | if (!ret) | |
319 | mark_inode_dirty(inode); | |
320 | return ret; | |
03f6e92b JK |
321 | } |
322 | ||
5dd4056d | 323 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 324 | { |
56246f9a ES |
325 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
326 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
327 | } |
328 | ||
5dd4056d | 329 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 330 | { |
5dd4056d | 331 | int ret; |
03f6e92b | 332 | |
5dd4056d CH |
333 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
334 | if (!ret) | |
335 | mark_inode_dirty(inode); | |
336 | return ret; | |
03f6e92b JK |
337 | } |
338 | ||
5dd4056d | 339 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 340 | { |
5dd4056d | 341 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
342 | } |
343 | ||
5dd4056d | 344 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 345 | { |
5dd4056d CH |
346 | dquot_free_space_nodirty(inode, nr); |
347 | mark_inode_dirty(inode); | |
740d9dcd MC |
348 | } |
349 | ||
5dd4056d | 350 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 351 | { |
5dd4056d | 352 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
353 | } |
354 | ||
5dd4056d | 355 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 356 | { |
5dd4056d | 357 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
358 | } |
359 | ||
5dd4056d CH |
360 | static inline void dquot_release_reservation_block(struct inode *inode, |
361 | qsize_t nr) | |
03f6e92b | 362 | { |
56246f9a | 363 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 364 | } |
1da177e4 LT |
365 | |
366 | #endif /* _LINUX_QUOTAOPS_ */ |