ACPI: fix OSC regression that caused aer and pciehp not to load
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / quotaops.h
blob3ebb231536405d5c6e557f337692de98969d8c63
1 /*
2 * Definitions for diskquota-operations. When diskquota is configured these
3 * macros expand to the right source-code.
5 * Author: Marco van Wieringen <mvw@planets.elm.net>
6 */
7 #ifndef _LINUX_QUOTAOPS_
8 #define _LINUX_QUOTAOPS_
10 #include <linux/fs.h>
12 static inline struct quota_info *sb_dqopt(struct super_block *sb)
14 return &sb->s_dquot;
17 #if defined(CONFIG_QUOTA)
20 * declaration of quota_function calls in kernel.
22 void sync_quota_sb(struct super_block *sb, int type);
23 static inline void writeout_quota_sb(struct super_block *sb, int type)
25 if (sb->s_qcop->quota_sync)
26 sb->s_qcop->quota_sync(sb, type);
29 int dquot_initialize(struct inode *inode, int type);
30 int dquot_drop(struct inode *inode);
31 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
32 void dqput(struct dquot *dquot);
33 int dquot_scan_active(struct super_block *sb,
34 int (*fn)(struct dquot *dquot, unsigned long priv),
35 unsigned long priv);
36 struct dquot *dquot_alloc(struct super_block *sb, int type);
37 void dquot_destroy(struct dquot *dquot);
39 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
40 int dquot_alloc_inode(const struct inode *inode, qsize_t number);
42 int dquot_reserve_space(struct inode *inode, qsize_t number, int prealloc);
43 int dquot_claim_space(struct inode *inode, qsize_t number);
44 void dquot_release_reserved_space(struct inode *inode, qsize_t number);
45 qsize_t dquot_get_reserved_space(struct inode *inode);
47 int dquot_free_space(struct inode *inode, qsize_t number);
48 int dquot_free_inode(const struct inode *inode, qsize_t number);
50 int dquot_transfer(struct inode *inode, struct iattr *iattr);
51 int dquot_commit(struct dquot *dquot);
52 int dquot_acquire(struct dquot *dquot);
53 int dquot_release(struct dquot *dquot);
54 int dquot_commit_info(struct super_block *sb, int type);
55 int dquot_mark_dquot_dirty(struct dquot *dquot);
57 int vfs_quota_on(struct super_block *sb, int type, int format_id,
58 char *path, int remount);
59 int vfs_quota_enable(struct inode *inode, int type, int format_id,
60 unsigned int flags);
61 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
62 struct path *path);
63 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
64 int format_id, int type);
65 int vfs_quota_off(struct super_block *sb, int type, int remount);
66 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
67 int vfs_quota_sync(struct super_block *sb, int type);
68 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
69 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
70 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
71 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
73 void vfs_dq_drop(struct inode *inode);
74 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
75 int vfs_dq_quota_on_remount(struct super_block *sb);
77 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
79 return sb_dqopt(sb)->info + type;
83 * Functions for checking status of quota
86 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
88 return sb_dqopt(sb)->flags &
89 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
92 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
94 return sb_dqopt(sb)->flags &
95 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
98 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
100 return sb_dqopt(sb)->flags &
101 dquot_state_flag(DQUOT_SUSPENDED, type);
104 static inline int sb_any_quota_suspended(struct super_block *sb)
106 return sb_has_quota_suspended(sb, USRQUOTA) ||
107 sb_has_quota_suspended(sb, GRPQUOTA);
110 /* Does kernel know about any quota information for given sb + type? */
111 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
113 /* Currently if anything is on, then quota usage is on as well */
114 return sb_has_quota_usage_enabled(sb, type);
117 static inline int sb_any_quota_loaded(struct super_block *sb)
119 return sb_has_quota_loaded(sb, USRQUOTA) ||
120 sb_has_quota_loaded(sb, GRPQUOTA);
123 static inline int sb_has_quota_active(struct super_block *sb, int type)
125 return sb_has_quota_loaded(sb, type) &&
126 !sb_has_quota_suspended(sb, type);
129 static inline int sb_any_quota_active(struct super_block *sb)
131 return sb_has_quota_active(sb, USRQUOTA) ||
132 sb_has_quota_active(sb, GRPQUOTA);
136 * Operations supported for diskquotas.
138 extern const struct dquot_operations dquot_operations;
139 extern const struct quotactl_ops vfs_quotactl_ops;
141 #define sb_dquot_ops (&dquot_operations)
142 #define sb_quotactl_ops (&vfs_quotactl_ops)
144 /* It is better to call this function outside of any transaction as it might
145 * need a lot of space in journal for dquot structure allocation. */
146 static inline void vfs_dq_init(struct inode *inode)
148 BUG_ON(!inode->i_sb);
149 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
150 inode->i_sb->dq_op->initialize(inode, -1);
153 /* The following allocation/freeing/transfer functions *must* be called inside
154 * a transaction (deadlocks possible otherwise) */
155 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
157 if (sb_any_quota_active(inode->i_sb)) {
158 /* Used space is updated in alloc_space() */
159 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
160 return 1;
162 else
163 inode_add_bytes(inode, nr);
164 return 0;
167 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
169 int ret;
170 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
171 mark_inode_dirty(inode);
172 return ret;
175 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
177 if (sb_any_quota_active(inode->i_sb)) {
178 /* Used space is updated in alloc_space() */
179 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
180 return 1;
182 else
183 inode_add_bytes(inode, nr);
184 return 0;
187 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
189 int ret;
190 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
191 mark_inode_dirty(inode);
192 return ret;
195 static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
197 if (sb_any_quota_active(inode->i_sb)) {
198 /* Used space is updated in alloc_space() */
199 if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
200 return 1;
202 return 0;
205 static inline int vfs_dq_alloc_inode(struct inode *inode)
207 if (sb_any_quota_active(inode->i_sb)) {
208 vfs_dq_init(inode);
209 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
210 return 1;
212 return 0;
216 * Convert in-memory reserved quotas to real consumed quotas
218 static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
220 if (sb_any_quota_active(inode->i_sb)) {
221 if (inode->i_sb->dq_op->claim_space(inode, nr) == NO_QUOTA)
222 return 1;
223 } else
224 inode_add_bytes(inode, nr);
226 mark_inode_dirty(inode);
227 return 0;
231 * Release reserved (in-memory) quotas
233 static inline
234 void vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
236 if (sb_any_quota_active(inode->i_sb))
237 inode->i_sb->dq_op->release_rsv(inode, nr);
240 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
242 if (sb_any_quota_active(inode->i_sb))
243 inode->i_sb->dq_op->free_space(inode, nr);
244 else
245 inode_sub_bytes(inode, nr);
248 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
250 vfs_dq_free_space_nodirty(inode, nr);
251 mark_inode_dirty(inode);
254 static inline void vfs_dq_free_inode(struct inode *inode)
256 if (sb_any_quota_active(inode->i_sb))
257 inode->i_sb->dq_op->free_inode(inode, 1);
260 /* Cannot be called inside a transaction */
261 static inline int vfs_dq_off(struct super_block *sb, int remount)
263 int ret = -ENOSYS;
265 if (sb->s_qcop && sb->s_qcop->quota_off)
266 ret = sb->s_qcop->quota_off(sb, -1, remount);
267 return ret;
270 #else
272 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
274 return 0;
277 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
279 return 0;
282 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
284 return 0;
287 static inline int sb_any_quota_suspended(struct super_block *sb)
289 return 0;
292 /* Does kernel know about any quota information for given sb + type? */
293 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
295 return 0;
298 static inline int sb_any_quota_loaded(struct super_block *sb)
300 return 0;
303 static inline int sb_has_quota_active(struct super_block *sb, int type)
305 return 0;
308 static inline int sb_any_quota_active(struct super_block *sb)
310 return 0;
314 * NO-OP when quota not configured.
316 #define sb_dquot_ops (NULL)
317 #define sb_quotactl_ops (NULL)
319 static inline void vfs_dq_init(struct inode *inode)
323 static inline void vfs_dq_drop(struct inode *inode)
327 static inline int vfs_dq_alloc_inode(struct inode *inode)
329 return 0;
332 static inline void vfs_dq_free_inode(struct inode *inode)
336 static inline void sync_quota_sb(struct super_block *sb, int type)
340 static inline void writeout_quota_sb(struct super_block *sb, int type)
344 static inline int vfs_dq_off(struct super_block *sb, int remount)
346 return 0;
349 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
351 return 0;
354 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
356 return 0;
359 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
361 inode_add_bytes(inode, nr);
362 return 0;
365 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
367 vfs_dq_prealloc_space_nodirty(inode, nr);
368 mark_inode_dirty(inode);
369 return 0;
372 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
374 inode_add_bytes(inode, nr);
375 return 0;
378 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
380 vfs_dq_alloc_space_nodirty(inode, nr);
381 mark_inode_dirty(inode);
382 return 0;
385 static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
387 return 0;
390 static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
392 return vfs_dq_alloc_space(inode, nr);
395 static inline
396 int vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
398 return 0;
401 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
403 inode_sub_bytes(inode, nr);
406 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
408 vfs_dq_free_space_nodirty(inode, nr);
409 mark_inode_dirty(inode);
412 #endif /* CONFIG_QUOTA */
414 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
416 return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
419 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
421 return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
424 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
426 return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
429 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
431 return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
434 static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
436 return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
439 static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
441 return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
444 static inline
445 void vfs_dq_release_reservation_block(struct inode *inode, qsize_t nr)
447 vfs_dq_release_reservation_space(inode, nr << inode->i_blkbits);
450 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
452 vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
455 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
457 vfs_dq_free_space(inode, nr << inode->i_blkbits);
460 #endif /* _LINUX_QUOTAOPS_ */