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>
7 #ifndef _LINUX_QUOTAOPS_
8 #define _LINUX_QUOTAOPS_
10 #include <linux/smp_lock.h>
13 static inline struct quota_info *sb_dqopt(struct super_block *sb)
18 #if defined(CONFIG_QUOTA)
21 * declaration of quota_function calls in kernel.
23 void sync_quota_sb(struct super_block *sb, int type);
24 static inline void writeout_quota_sb(struct super_block *sb, int type)
26 if (sb->s_qcop->quota_sync)
27 sb->s_qcop->quota_sync(sb, type);
30 int dquot_initialize(struct inode *inode, int type);
31 int dquot_drop(struct inode *inode);
32 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
33 void dqput(struct dquot *dquot);
34 int dquot_scan_active(struct super_block *sb,
35 int (*fn)(struct dquot *dquot, unsigned long priv),
37 struct dquot *dquot_alloc(struct super_block *sb, int type);
38 void dquot_destroy(struct dquot *dquot);
40 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
41 int dquot_alloc_inode(const struct inode *inode, qsize_t number);
43 int dquot_reserve_space(struct inode *inode, qsize_t number, int prealloc);
44 int dquot_claim_space(struct inode *inode, qsize_t number);
45 void dquot_release_reserved_space(struct inode *inode, qsize_t number);
46 qsize_t dquot_get_reserved_space(struct inode *inode);
48 int dquot_free_space(struct inode *inode, qsize_t number);
49 int dquot_free_inode(const struct inode *inode, qsize_t number);
51 int dquot_transfer(struct inode *inode, struct iattr *iattr);
52 int dquot_commit(struct dquot *dquot);
53 int dquot_acquire(struct dquot *dquot);
54 int dquot_release(struct dquot *dquot);
55 int dquot_commit_info(struct super_block *sb, int type);
56 int dquot_mark_dquot_dirty(struct dquot *dquot);
58 int vfs_quota_on(struct super_block *sb, int type, int format_id,
59 char *path, int remount);
60 int vfs_quota_enable(struct inode *inode, int type, int format_id,
62 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
64 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
65 int format_id, int type);
66 int vfs_quota_off(struct super_block *sb, int type, int remount);
67 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
68 int vfs_quota_sync(struct super_block *sb, int type);
69 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
70 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
71 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
72 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
74 void vfs_dq_drop(struct inode *inode);
75 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
76 int vfs_dq_quota_on_remount(struct super_block *sb);
78 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
80 return sb_dqopt(sb)->info + type;
84 * Functions for checking status of quota
87 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
89 return sb_dqopt(sb)->flags &
90 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
93 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
95 return sb_dqopt(sb)->flags &
96 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
99 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
101 return sb_dqopt(sb)->flags &
102 dquot_state_flag(DQUOT_SUSPENDED, type);
105 static inline int sb_any_quota_suspended(struct super_block *sb)
107 return sb_has_quota_suspended(sb, USRQUOTA) ||
108 sb_has_quota_suspended(sb, GRPQUOTA);
111 /* Does kernel know about any quota information for given sb + type? */
112 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
114 /* Currently if anything is on, then quota usage is on as well */
115 return sb_has_quota_usage_enabled(sb, type);
118 static inline int sb_any_quota_loaded(struct super_block *sb)
120 return sb_has_quota_loaded(sb, USRQUOTA) ||
121 sb_has_quota_loaded(sb, GRPQUOTA);
124 static inline int sb_has_quota_active(struct super_block *sb, int type)
126 return sb_has_quota_loaded(sb, type) &&
127 !sb_has_quota_suspended(sb, type);
130 static inline int sb_any_quota_active(struct super_block *sb)
132 return sb_has_quota_active(sb, USRQUOTA) ||
133 sb_has_quota_active(sb, GRPQUOTA);
137 * Operations supported for diskquotas.
139 extern struct dquot_operations dquot_operations;
140 extern struct quotactl_ops vfs_quotactl_ops;
142 #define sb_dquot_ops (&dquot_operations)
143 #define sb_quotactl_ops (&vfs_quotactl_ops)
145 /* It is better to call this function outside of any transaction as it might
146 * need a lot of space in journal for dquot structure allocation. */
147 static inline void vfs_dq_init(struct inode *inode)
149 BUG_ON(!inode->i_sb);
150 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
151 inode->i_sb->dq_op->initialize(inode, -1);
154 /* The following allocation/freeing/transfer functions *must* be called inside
155 * a transaction (deadlocks possible otherwise) */
156 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
158 if (sb_any_quota_active(inode->i_sb)) {
159 /* Used space is updated in alloc_space() */
160 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
164 inode_add_bytes(inode, nr);
168 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
171 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
172 mark_inode_dirty(inode);
176 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
178 if (sb_any_quota_active(inode->i_sb)) {
179 /* Used space is updated in alloc_space() */
180 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
184 inode_add_bytes(inode, nr);
188 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
191 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
192 mark_inode_dirty(inode);
196 static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
198 if (sb_any_quota_active(inode->i_sb)) {
199 /* Used space is updated in alloc_space() */
200 if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
206 static inline int vfs_dq_alloc_inode(struct inode *inode)
208 if (sb_any_quota_active(inode->i_sb)) {
210 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
217 * Convert in-memory reserved quotas to real consumed quotas
219 static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
221 if (sb_any_quota_active(inode->i_sb)) {
222 if (inode->i_sb->dq_op->claim_space(inode, nr) == NO_QUOTA)
225 inode_add_bytes(inode, nr);
227 mark_inode_dirty(inode);
232 * Release reserved (in-memory) quotas
235 void vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
237 if (sb_any_quota_active(inode->i_sb))
238 inode->i_sb->dq_op->release_rsv(inode, nr);
241 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
243 if (sb_any_quota_active(inode->i_sb))
244 inode->i_sb->dq_op->free_space(inode, nr);
246 inode_sub_bytes(inode, nr);
249 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
251 vfs_dq_free_space_nodirty(inode, nr);
252 mark_inode_dirty(inode);
255 static inline void vfs_dq_free_inode(struct inode *inode)
257 if (sb_any_quota_active(inode->i_sb))
258 inode->i_sb->dq_op->free_inode(inode, 1);
261 /* Cannot be called inside a transaction */
262 static inline int vfs_dq_off(struct super_block *sb, int remount)
266 if (sb->s_qcop && sb->s_qcop->quota_off)
267 ret = sb->s_qcop->quota_off(sb, -1, remount);
273 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
278 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
283 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
288 static inline int sb_any_quota_suspended(struct super_block *sb)
293 /* Does kernel know about any quota information for given sb + type? */
294 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
299 static inline int sb_any_quota_loaded(struct super_block *sb)
304 static inline int sb_has_quota_active(struct super_block *sb, int type)
309 static inline int sb_any_quota_active(struct super_block *sb)
315 * NO-OP when quota not configured.
317 #define sb_dquot_ops (NULL)
318 #define sb_quotactl_ops (NULL)
320 static inline void vfs_dq_init(struct inode *inode)
324 static inline void vfs_dq_drop(struct inode *inode)
328 static inline int vfs_dq_alloc_inode(struct inode *inode)
333 static inline void vfs_dq_free_inode(struct inode *inode)
337 static inline void sync_quota_sb(struct super_block *sb, int type)
341 static inline void writeout_quota_sb(struct super_block *sb, int type)
345 static inline int vfs_dq_off(struct super_block *sb, int remount)
350 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
355 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
360 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
362 inode_add_bytes(inode, nr);
366 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
368 vfs_dq_prealloc_space_nodirty(inode, nr);
369 mark_inode_dirty(inode);
373 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
375 inode_add_bytes(inode, nr);
379 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
381 vfs_dq_alloc_space_nodirty(inode, nr);
382 mark_inode_dirty(inode);
386 static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
391 static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
393 return vfs_dq_alloc_space(inode, nr);
397 int vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
402 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
404 inode_sub_bytes(inode, nr);
407 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
409 vfs_dq_free_space_nodirty(inode, nr);
410 mark_inode_dirty(inode);
413 #endif /* CONFIG_QUOTA */
415 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
417 return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
420 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
422 return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
425 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
427 return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
430 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
432 return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
435 static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
437 return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
440 static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
442 return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
446 void vfs_dq_release_reservation_block(struct inode *inode, qsize_t nr)
448 vfs_dq_release_reservation_space(inode, nr << inode->i_blkbits);
451 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
453 vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
456 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
458 vfs_dq_free_space(inode, nr << inode->i_blkbits);
461 #endif /* _LINUX_QUOTAOPS_ */