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-rw-r--r--include/linux/quotaops.h281
1 files changed, 164 insertions, 117 deletions
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index f86702053853..742187f7a05c 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -11,42 +11,85 @@
11#define _LINUX_QUOTAOPS_ 11#define _LINUX_QUOTAOPS_
12 12
13#include <linux/smp_lock.h> 13#include <linux/smp_lock.h>
14
15#include <linux/fs.h> 14#include <linux/fs.h>
16 15
16static inline struct quota_info *sb_dqopt(struct super_block *sb)
17{
18 return &sb->s_dquot;
19}
20
17#if defined(CONFIG_QUOTA) 21#if defined(CONFIG_QUOTA)
18 22
19/* 23/*
20 * declaration of quota_function calls in kernel. 24 * declaration of quota_function calls in kernel.
21 */ 25 */
22extern void sync_dquots(struct super_block *sb, int type); 26void sync_dquots(struct super_block *sb, int type);
23 27
24extern int dquot_initialize(struct inode *inode, int type); 28int dquot_initialize(struct inode *inode, int type);
25extern int dquot_drop(struct inode *inode); 29int dquot_drop(struct inode *inode);
26 30
27extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc); 31int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
28extern int dquot_alloc_inode(const struct inode *inode, unsigned long number); 32int dquot_alloc_inode(const struct inode *inode, unsigned long number);
29 33
30extern int dquot_free_space(struct inode *inode, qsize_t number); 34int dquot_free_space(struct inode *inode, qsize_t number);
31extern int dquot_free_inode(const struct inode *inode, unsigned long number); 35int dquot_free_inode(const struct inode *inode, unsigned long number);
32 36
33extern int dquot_transfer(struct inode *inode, struct iattr *iattr); 37int dquot_transfer(struct inode *inode, struct iattr *iattr);
34extern int dquot_commit(struct dquot *dquot); 38int dquot_commit(struct dquot *dquot);
35extern int dquot_acquire(struct dquot *dquot); 39int dquot_acquire(struct dquot *dquot);
36extern int dquot_release(struct dquot *dquot); 40int dquot_release(struct dquot *dquot);
37extern int dquot_commit_info(struct super_block *sb, int type); 41int dquot_commit_info(struct super_block *sb, int type);
38extern int dquot_mark_dquot_dirty(struct dquot *dquot); 42int dquot_mark_dquot_dirty(struct dquot *dquot);
39 43
40extern int vfs_quota_on(struct super_block *sb, int type, int format_id, 44int vfs_quota_on(struct super_block *sb, int type, int format_id,
41 char *path, int remount); 45 char *path, int remount);
42extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name, 46int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
43 int format_id, int type); 47 int format_id, int type);
44extern int vfs_quota_off(struct super_block *sb, int type, int remount); 48int vfs_quota_off(struct super_block *sb, int type, int remount);
45extern int vfs_quota_sync(struct super_block *sb, int type); 49int vfs_quota_sync(struct super_block *sb, int type);
46extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); 50int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
47extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); 51int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
48extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); 52int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
49extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); 53int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
54
55void vfs_dq_drop(struct inode *inode);
56int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
57int vfs_dq_quota_on_remount(struct super_block *sb);
58
59static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
60{
61 return sb_dqopt(sb)->info + type;
62}
63
64/*
65 * Functions for checking status of quota
66 */
67
68static inline int sb_has_quota_enabled(struct super_block *sb, int type)
69{
70 if (type == USRQUOTA)
71 return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
72 return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
73}
74
75static inline int sb_any_quota_enabled(struct super_block *sb)
76{
77 return sb_has_quota_enabled(sb, USRQUOTA) ||
78 sb_has_quota_enabled(sb, GRPQUOTA);
79}
80
81static inline int sb_has_quota_suspended(struct super_block *sb, int type)
82{
83 if (type == USRQUOTA)
84 return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
85 return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
86}
87
88static inline int sb_any_quota_suspended(struct super_block *sb)
89{
90 return sb_has_quota_suspended(sb, USRQUOTA) ||
91 sb_has_quota_suspended(sb, GRPQUOTA);
92}
50 93
51/* 94/*
52 * Operations supported for diskquotas. 95 * Operations supported for diskquotas.
@@ -59,38 +102,16 @@ extern struct quotactl_ops vfs_quotactl_ops;
59 102
60/* It is better to call this function outside of any transaction as it might 103/* It is better to call this function outside of any transaction as it might
61 * need a lot of space in journal for dquot structure allocation. */ 104 * need a lot of space in journal for dquot structure allocation. */
62static inline void DQUOT_INIT(struct inode *inode) 105static inline void vfs_dq_init(struct inode *inode)
63{ 106{
64 BUG_ON(!inode->i_sb); 107 BUG_ON(!inode->i_sb);
65 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) 108 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
66 inode->i_sb->dq_op->initialize(inode, -1); 109 inode->i_sb->dq_op->initialize(inode, -1);
67} 110}
68 111
69/* The same as with DQUOT_INIT */
70static inline void DQUOT_DROP(struct inode *inode)
71{
72 /* Here we can get arbitrary inode from clear_inode() so we have
73 * to be careful. OTOH we don't need locking as quota operations
74 * are allowed to change only at mount time */
75 if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
76 && inode->i_sb->dq_op->drop) {
77 int cnt;
78 /* Test before calling to rule out calls from proc and such
79 * where we are not allowed to block. Note that this is
80 * actually reliable test even without the lock - the caller
81 * must assure that nobody can come after the DQUOT_DROP and
82 * add quota pointers back anyway */
83 for (cnt = 0; cnt < MAXQUOTAS; cnt++)
84 if (inode->i_dquot[cnt] != NODQUOT)
85 break;
86 if (cnt < MAXQUOTAS)
87 inode->i_sb->dq_op->drop(inode);
88 }
89}
90
91/* The following allocation/freeing/transfer functions *must* be called inside 112/* The following allocation/freeing/transfer functions *must* be called inside
92 * a transaction (deadlocks possible otherwise) */ 113 * a transaction (deadlocks possible otherwise) */
93static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 114static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
94{ 115{
95 if (sb_any_quota_enabled(inode->i_sb)) { 116 if (sb_any_quota_enabled(inode->i_sb)) {
96 /* Used space is updated in alloc_space() */ 117 /* Used space is updated in alloc_space() */
@@ -102,15 +123,15 @@ static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
102 return 0; 123 return 0;
103} 124}
104 125
105static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) 126static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
106{ 127{
107 int ret; 128 int ret;
108 if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr))) 129 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
109 mark_inode_dirty(inode); 130 mark_inode_dirty(inode);
110 return ret; 131 return ret;
111} 132}
112 133
113static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 134static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
114{ 135{
115 if (sb_any_quota_enabled(inode->i_sb)) { 136 if (sb_any_quota_enabled(inode->i_sb)) {
116 /* Used space is updated in alloc_space() */ 137 /* Used space is updated in alloc_space() */
@@ -122,25 +143,25 @@ static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
122 return 0; 143 return 0;
123} 144}
124 145
125static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) 146static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
126{ 147{
127 int ret; 148 int ret;
128 if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr))) 149 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
129 mark_inode_dirty(inode); 150 mark_inode_dirty(inode);
130 return ret; 151 return ret;
131} 152}
132 153
133static inline int DQUOT_ALLOC_INODE(struct inode *inode) 154static inline int vfs_dq_alloc_inode(struct inode *inode)
134{ 155{
135 if (sb_any_quota_enabled(inode->i_sb)) { 156 if (sb_any_quota_enabled(inode->i_sb)) {
136 DQUOT_INIT(inode); 157 vfs_dq_init(inode);
137 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) 158 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
138 return 1; 159 return 1;
139 } 160 }
140 return 0; 161 return 0;
141} 162}
142 163
143static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 164static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
144{ 165{
145 if (sb_any_quota_enabled(inode->i_sb)) 166 if (sb_any_quota_enabled(inode->i_sb))
146 inode->i_sb->dq_op->free_space(inode, nr); 167 inode->i_sb->dq_op->free_space(inode, nr);
@@ -148,35 +169,25 @@ static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
148 inode_sub_bytes(inode, nr); 169 inode_sub_bytes(inode, nr);
149} 170}
150 171
151static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) 172static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
152{ 173{
153 DQUOT_FREE_SPACE_NODIRTY(inode, nr); 174 vfs_dq_free_space_nodirty(inode, nr);
154 mark_inode_dirty(inode); 175 mark_inode_dirty(inode);
155} 176}
156 177
157static inline void DQUOT_FREE_INODE(struct inode *inode) 178static inline void vfs_dq_free_inode(struct inode *inode)
158{ 179{
159 if (sb_any_quota_enabled(inode->i_sb)) 180 if (sb_any_quota_enabled(inode->i_sb))
160 inode->i_sb->dq_op->free_inode(inode, 1); 181 inode->i_sb->dq_op->free_inode(inode, 1);
161} 182}
162 183
163static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
164{
165 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
166 DQUOT_INIT(inode);
167 if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
168 return 1;
169 }
170 return 0;
171}
172
173/* The following two functions cannot be called inside a transaction */ 184/* The following two functions cannot be called inside a transaction */
174static inline void DQUOT_SYNC(struct super_block *sb) 185static inline void vfs_dq_sync(struct super_block *sb)
175{ 186{
176 sync_dquots(sb, -1); 187 sync_dquots(sb, -1);
177} 188}
178 189
179static inline int DQUOT_OFF(struct super_block *sb, int remount) 190static inline int vfs_dq_off(struct super_block *sb, int remount)
180{ 191{
181 int ret = -ENOSYS; 192 int ret = -ENOSYS;
182 193
@@ -185,22 +196,27 @@ static inline int DQUOT_OFF(struct super_block *sb, int remount)
185 return ret; 196 return ret;
186} 197}
187 198
188static inline int DQUOT_ON_REMOUNT(struct super_block *sb) 199#else
200
201static inline int sb_has_quota_enabled(struct super_block *sb, int type)
189{ 202{
190 int cnt; 203 return 0;
191 int ret = 0, err; 204}
192 205
193 if (!sb->s_qcop || !sb->s_qcop->quota_on) 206static inline int sb_any_quota_enabled(struct super_block *sb)
194 return -ENOSYS; 207{
195 for (cnt = 0; cnt < MAXQUOTAS; cnt++) { 208 return 0;
196 err = sb->s_qcop->quota_on(sb, cnt, 0, NULL, 1);
197 if (err < 0 && !ret)
198 ret = err;
199 }
200 return ret;
201} 209}
202 210
203#else 211static inline int sb_has_quota_suspended(struct super_block *sb, int type)
212{
213 return 0;
214}
215
216static inline int sb_any_quota_suspended(struct super_block *sb)
217{
218 return 0;
219}
204 220
205/* 221/*
206 * NO-OP when quota not configured. 222 * NO-OP when quota not configured.
@@ -208,113 +224,144 @@ static inline int DQUOT_ON_REMOUNT(struct super_block *sb)
208#define sb_dquot_ops (NULL) 224#define sb_dquot_ops (NULL)
209#define sb_quotactl_ops (NULL) 225#define sb_quotactl_ops (NULL)
210 226
211static inline void DQUOT_INIT(struct inode *inode) 227static inline void vfs_dq_init(struct inode *inode)
212{ 228{
213} 229}
214 230
215static inline void DQUOT_DROP(struct inode *inode) 231static inline void vfs_dq_drop(struct inode *inode)
216{ 232{
217} 233}
218 234
219static inline int DQUOT_ALLOC_INODE(struct inode *inode) 235static inline int vfs_dq_alloc_inode(struct inode *inode)
220{ 236{
221 return 0; 237 return 0;
222} 238}
223 239
224static inline void DQUOT_FREE_INODE(struct inode *inode) 240static inline void vfs_dq_free_inode(struct inode *inode)
225{ 241{
226} 242}
227 243
228static inline void DQUOT_SYNC(struct super_block *sb) 244static inline void vfs_dq_sync(struct super_block *sb)
229{ 245{
230} 246}
231 247
232static inline int DQUOT_OFF(struct super_block *sb, int remount) 248static inline int vfs_dq_off(struct super_block *sb, int remount)
233{ 249{
234 return 0; 250 return 0;
235} 251}
236 252
237static inline int DQUOT_ON_REMOUNT(struct super_block *sb) 253static inline int vfs_dq_quota_on_remount(struct super_block *sb)
238{ 254{
239 return 0; 255 return 0;
240} 256}
241 257
242static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr) 258static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
243{ 259{
244 return 0; 260 return 0;
245} 261}
246 262
247static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 263static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
248{ 264{
249 inode_add_bytes(inode, nr); 265 inode_add_bytes(inode, nr);
250 return 0; 266 return 0;
251} 267}
252 268
253static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr) 269static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
254{ 270{
255 DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr); 271 vfs_dq_prealloc_space_nodirty(inode, nr);
256 mark_inode_dirty(inode); 272 mark_inode_dirty(inode);
257 return 0; 273 return 0;
258} 274}
259 275
260static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 276static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
261{ 277{
262 inode_add_bytes(inode, nr); 278 inode_add_bytes(inode, nr);
263 return 0; 279 return 0;
264} 280}
265 281
266static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr) 282static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
267{ 283{
268 DQUOT_ALLOC_SPACE_NODIRTY(inode, nr); 284 vfs_dq_alloc_space_nodirty(inode, nr);
269 mark_inode_dirty(inode); 285 mark_inode_dirty(inode);
270 return 0; 286 return 0;
271} 287}
272 288
273static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr) 289static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
274{ 290{
275 inode_sub_bytes(inode, nr); 291 inode_sub_bytes(inode, nr);
276} 292}
277 293
278static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr) 294static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
279{ 295{
280 DQUOT_FREE_SPACE_NODIRTY(inode, nr); 296 vfs_dq_free_space_nodirty(inode, nr);
281 mark_inode_dirty(inode); 297 mark_inode_dirty(inode);
282} 298}
283 299
284#endif /* CONFIG_QUOTA */ 300#endif /* CONFIG_QUOTA */
285 301
286static inline int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) 302static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
287{ 303{
288 return DQUOT_PREALLOC_SPACE_NODIRTY(inode, 304 return vfs_dq_prealloc_space_nodirty(inode,
289 nr << inode->i_sb->s_blocksize_bits); 305 nr << inode->i_sb->s_blocksize_bits);
290} 306}
291 307
292static inline int DQUOT_PREALLOC_BLOCK(struct inode *inode, qsize_t nr) 308static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
293{ 309{
294 return DQUOT_PREALLOC_SPACE(inode, 310 return vfs_dq_prealloc_space(inode,
295 nr << inode->i_sb->s_blocksize_bits); 311 nr << inode->i_sb->s_blocksize_bits);
296} 312}
297 313
298static inline int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) 314static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
299{ 315{
300 return DQUOT_ALLOC_SPACE_NODIRTY(inode, 316 return vfs_dq_alloc_space_nodirty(inode,
301 nr << inode->i_sb->s_blocksize_bits); 317 nr << inode->i_sb->s_blocksize_bits);
302} 318}
303 319
304static inline int DQUOT_ALLOC_BLOCK(struct inode *inode, qsize_t nr) 320static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
305{ 321{
306 return DQUOT_ALLOC_SPACE(inode, 322 return vfs_dq_alloc_space(inode,
307 nr << inode->i_sb->s_blocksize_bits); 323 nr << inode->i_sb->s_blocksize_bits);
308} 324}
309 325
310static inline void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, qsize_t nr) 326static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
311{ 327{
312 DQUOT_FREE_SPACE_NODIRTY(inode, nr << inode->i_sb->s_blocksize_bits); 328 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
313} 329}
314 330
315static inline void DQUOT_FREE_BLOCK(struct inode *inode, qsize_t nr) 331static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
316{ 332{
317 DQUOT_FREE_SPACE(inode, nr << inode->i_sb->s_blocksize_bits); 333 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
318} 334}
319 335
336/*
337 * Define uppercase equivalents for compatibility with old function names
338 * Can go away when we think all users have been converted (15/04/2008)
339 */
340#define DQUOT_INIT(inode) vfs_dq_init(inode)
341#define DQUOT_DROP(inode) vfs_dq_drop(inode)
342#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
343 vfs_dq_prealloc_space_nodirty(inode, nr)
344#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
345#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
346 vfs_dq_alloc_space_nodirty(inode, nr)
347#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
348#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
349 vfs_dq_prealloc_block_nodirty(inode, nr)
350#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
351#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
352 vfs_dq_alloc_block_nodirty(inode, nr)
353#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
354#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
355#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
356 vfs_dq_free_space_nodirty(inode, nr)
357#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
358#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
359 vfs_dq_free_block_nodirty(inode, nr)
360#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
361#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
362#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
363#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
364#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
365#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
366
320#endif /* _LINUX_QUOTAOPS_ */ 367#endif /* _LINUX_QUOTAOPS_ */
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-03 19:23:13 -0500