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_dquots(struct super_block *sb, int type);
25 int dquot_initialize(struct inode *inode, int type);
26 int dquot_drop(struct inode *inode);
28 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
29 int dquot_alloc_inode(const struct inode *inode, qsize_t number);
31 int dquot_free_space(struct inode *inode, qsize_t number);
32 int dquot_free_inode(const struct inode *inode, qsize_t number);
34 int dquot_transfer(struct inode *inode, struct iattr *iattr);
35 int dquot_commit(struct dquot *dquot);
36 int dquot_acquire(struct dquot *dquot);
37 int dquot_release(struct dquot *dquot);
38 int dquot_commit_info(struct super_block *sb, int type);
39 int dquot_mark_dquot_dirty(struct dquot *dquot);
41 int vfs_quota_on(struct super_block *sb, int type, int format_id,
42 char *path, int remount);
43 int vfs_quota_enable(struct inode *inode, int type, int format_id,
45 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
47 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
48 int format_id, int type);
49 int vfs_quota_off(struct super_block *sb, int type, int remount);
50 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
51 int vfs_quota_sync(struct super_block *sb, int type);
52 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
53 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
54 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
55 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
57 void vfs_dq_drop(struct inode *inode);
58 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
59 int vfs_dq_quota_on_remount(struct super_block *sb);
61 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
63 return sb_dqopt(sb)->info + type;
67 * Functions for checking status of quota
70 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
72 return sb_dqopt(sb)->flags &
73 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
76 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
78 return sb_dqopt(sb)->flags &
79 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
82 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
84 return sb_dqopt(sb)->flags &
85 dquot_state_flag(DQUOT_SUSPENDED, type);
88 static inline int sb_any_quota_suspended(struct super_block *sb)
90 return sb_has_quota_suspended(sb, USRQUOTA) ||
91 sb_has_quota_suspended(sb, GRPQUOTA);
94 /* Does kernel know about any quota information for given sb + type? */
95 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
97 /* Currently if anything is on, then quota usage is on as well */
98 return sb_has_quota_usage_enabled(sb, type);
101 static inline int sb_any_quota_loaded(struct super_block *sb)
103 return sb_has_quota_loaded(sb, USRQUOTA) ||
104 sb_has_quota_loaded(sb, GRPQUOTA);
107 static inline int sb_has_quota_active(struct super_block *sb, int type)
109 return sb_has_quota_loaded(sb, type) &&
110 !sb_has_quota_suspended(sb, type);
113 static inline int sb_any_quota_active(struct super_block *sb)
115 return sb_has_quota_active(sb, USRQUOTA) ||
116 sb_has_quota_active(sb, GRPQUOTA);
120 * Operations supported for diskquotas.
122 extern struct dquot_operations dquot_operations;
123 extern struct quotactl_ops vfs_quotactl_ops;
125 #define sb_dquot_ops (&dquot_operations)
126 #define sb_quotactl_ops (&vfs_quotactl_ops)
128 /* It is better to call this function outside of any transaction as it might
129 * need a lot of space in journal for dquot structure allocation. */
130 static inline void vfs_dq_init(struct inode *inode)
132 BUG_ON(!inode->i_sb);
133 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
134 inode->i_sb->dq_op->initialize(inode, -1);
137 /* The following allocation/freeing/transfer functions *must* be called inside
138 * a transaction (deadlocks possible otherwise) */
139 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
141 if (sb_any_quota_active(inode->i_sb)) {
142 /* Used space is updated in alloc_space() */
143 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
147 inode_add_bytes(inode, nr);
151 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
154 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
155 mark_inode_dirty(inode);
159 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
161 if (sb_any_quota_active(inode->i_sb)) {
162 /* Used space is updated in alloc_space() */
163 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
167 inode_add_bytes(inode, nr);
171 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
174 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
175 mark_inode_dirty(inode);
179 static inline int vfs_dq_alloc_inode(struct inode *inode)
181 if (sb_any_quota_active(inode->i_sb)) {
183 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
189 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
191 if (sb_any_quota_active(inode->i_sb))
192 inode->i_sb->dq_op->free_space(inode, nr);
194 inode_sub_bytes(inode, nr);
197 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
199 vfs_dq_free_space_nodirty(inode, nr);
200 mark_inode_dirty(inode);
203 static inline void vfs_dq_free_inode(struct inode *inode)
205 if (sb_any_quota_active(inode->i_sb))
206 inode->i_sb->dq_op->free_inode(inode, 1);
209 /* The following two functions cannot be called inside a transaction */
210 static inline void vfs_dq_sync(struct super_block *sb)
215 static inline int vfs_dq_off(struct super_block *sb, int remount)
219 if (sb->s_qcop && sb->s_qcop->quota_off)
220 ret = sb->s_qcop->quota_off(sb, -1, remount);
226 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
231 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
236 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
241 static inline int sb_any_quota_suspended(struct super_block *sb)
246 /* Does kernel know about any quota information for given sb + type? */
247 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
252 static inline int sb_any_quota_loaded(struct super_block *sb)
257 static inline int sb_has_quota_active(struct super_block *sb, int type)
262 static inline int sb_any_quota_active(struct super_block *sb)
268 * NO-OP when quota not configured.
270 #define sb_dquot_ops (NULL)
271 #define sb_quotactl_ops (NULL)
273 static inline void vfs_dq_init(struct inode *inode)
277 static inline void vfs_dq_drop(struct inode *inode)
281 static inline int vfs_dq_alloc_inode(struct inode *inode)
286 static inline void vfs_dq_free_inode(struct inode *inode)
290 static inline void vfs_dq_sync(struct super_block *sb)
294 static inline int vfs_dq_off(struct super_block *sb, int remount)
299 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
304 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
309 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
311 inode_add_bytes(inode, nr);
315 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
317 vfs_dq_prealloc_space_nodirty(inode, nr);
318 mark_inode_dirty(inode);
322 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
324 inode_add_bytes(inode, nr);
328 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
330 vfs_dq_alloc_space_nodirty(inode, nr);
331 mark_inode_dirty(inode);
335 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
337 inode_sub_bytes(inode, nr);
340 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
342 vfs_dq_free_space_nodirty(inode, nr);
343 mark_inode_dirty(inode);
346 #endif /* CONFIG_QUOTA */
348 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
350 return vfs_dq_prealloc_space_nodirty(inode,
351 nr << inode->i_sb->s_blocksize_bits);
354 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
356 return vfs_dq_prealloc_space(inode,
357 nr << inode->i_sb->s_blocksize_bits);
360 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
362 return vfs_dq_alloc_space_nodirty(inode,
363 nr << inode->i_sb->s_blocksize_bits);
366 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
368 return vfs_dq_alloc_space(inode,
369 nr << inode->i_sb->s_blocksize_bits);
372 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
374 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
377 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
379 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
383 * Define uppercase equivalents for compatibility with old function names
384 * Can go away when we think all users have been converted (15/04/2008)
386 #define DQUOT_INIT(inode) vfs_dq_init(inode)
387 #define DQUOT_DROP(inode) vfs_dq_drop(inode)
388 #define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
389 vfs_dq_prealloc_space_nodirty(inode, nr)
390 #define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
391 #define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
392 vfs_dq_alloc_space_nodirty(inode, nr)
393 #define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
394 #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
395 vfs_dq_prealloc_block_nodirty(inode, nr)
396 #define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
397 #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
398 vfs_dq_alloc_block_nodirty(inode, nr)
399 #define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
400 #define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
401 #define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
402 vfs_dq_free_space_nodirty(inode, nr)
403 #define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
404 #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
405 vfs_dq_free_block_nodirty(inode, nr)
406 #define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
407 #define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
408 #define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
409 #define DQUOT_SYNC(sb) vfs_dq_sync(sb)
410 #define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
411 #define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
413 #endif /* _LINUX_QUOTAOPS_ */