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);
27 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
28 void dqput(struct dquot *dquot);
29 int dquot_scan_active(struct super_block *sb,
30 int (*fn)(struct dquot *dquot, unsigned long priv),
32 struct dquot *dquot_alloc(struct super_block *sb, int type);
33 void dquot_destroy(struct dquot *dquot);
35 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
36 int dquot_alloc_inode(const struct inode *inode, qsize_t number);
38 int dquot_free_space(struct inode *inode, qsize_t number);
39 int dquot_free_inode(const struct inode *inode, qsize_t number);
41 int dquot_transfer(struct inode *inode, struct iattr *iattr);
42 int dquot_commit(struct dquot *dquot);
43 int dquot_acquire(struct dquot *dquot);
44 int dquot_release(struct dquot *dquot);
45 int dquot_commit_info(struct super_block *sb, int type);
46 int dquot_mark_dquot_dirty(struct dquot *dquot);
48 int vfs_quota_on(struct super_block *sb, int type, int format_id,
49 char *path, int remount);
50 int vfs_quota_enable(struct inode *inode, int type, int format_id,
52 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
54 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
55 int format_id, int type);
56 int vfs_quota_off(struct super_block *sb, int type, int remount);
57 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
58 int vfs_quota_sync(struct super_block *sb, int type);
59 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
60 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
61 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
62 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
64 void vfs_dq_drop(struct inode *inode);
65 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
66 int vfs_dq_quota_on_remount(struct super_block *sb);
68 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
70 return sb_dqopt(sb)->info + type;
74 * Functions for checking status of quota
77 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
79 return sb_dqopt(sb)->flags &
80 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
83 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
85 return sb_dqopt(sb)->flags &
86 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
89 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
91 return sb_dqopt(sb)->flags &
92 dquot_state_flag(DQUOT_SUSPENDED, type);
95 static inline int sb_any_quota_suspended(struct super_block *sb)
97 return sb_has_quota_suspended(sb, USRQUOTA) ||
98 sb_has_quota_suspended(sb, GRPQUOTA);
101 /* Does kernel know about any quota information for given sb + type? */
102 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
104 /* Currently if anything is on, then quota usage is on as well */
105 return sb_has_quota_usage_enabled(sb, type);
108 static inline int sb_any_quota_loaded(struct super_block *sb)
110 return sb_has_quota_loaded(sb, USRQUOTA) ||
111 sb_has_quota_loaded(sb, GRPQUOTA);
114 static inline int sb_has_quota_active(struct super_block *sb, int type)
116 return sb_has_quota_loaded(sb, type) &&
117 !sb_has_quota_suspended(sb, type);
120 static inline int sb_any_quota_active(struct super_block *sb)
122 return sb_has_quota_active(sb, USRQUOTA) ||
123 sb_has_quota_active(sb, GRPQUOTA);
127 * Operations supported for diskquotas.
129 extern struct dquot_operations dquot_operations;
130 extern struct quotactl_ops vfs_quotactl_ops;
132 #define sb_dquot_ops (&dquot_operations)
133 #define sb_quotactl_ops (&vfs_quotactl_ops)
135 /* It is better to call this function outside of any transaction as it might
136 * need a lot of space in journal for dquot structure allocation. */
137 static inline void vfs_dq_init(struct inode *inode)
139 BUG_ON(!inode->i_sb);
140 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
141 inode->i_sb->dq_op->initialize(inode, -1);
144 /* The following allocation/freeing/transfer functions *must* be called inside
145 * a transaction (deadlocks possible otherwise) */
146 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
148 if (sb_any_quota_active(inode->i_sb)) {
149 /* Used space is updated in alloc_space() */
150 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
154 inode_add_bytes(inode, nr);
158 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
161 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
162 mark_inode_dirty(inode);
166 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
168 if (sb_any_quota_active(inode->i_sb)) {
169 /* Used space is updated in alloc_space() */
170 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
174 inode_add_bytes(inode, nr);
178 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
181 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
182 mark_inode_dirty(inode);
186 static inline int vfs_dq_alloc_inode(struct inode *inode)
188 if (sb_any_quota_active(inode->i_sb)) {
190 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
196 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
198 if (sb_any_quota_active(inode->i_sb))
199 inode->i_sb->dq_op->free_space(inode, nr);
201 inode_sub_bytes(inode, nr);
204 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
206 vfs_dq_free_space_nodirty(inode, nr);
207 mark_inode_dirty(inode);
210 static inline void vfs_dq_free_inode(struct inode *inode)
212 if (sb_any_quota_active(inode->i_sb))
213 inode->i_sb->dq_op->free_inode(inode, 1);
216 /* The following two functions cannot be called inside a transaction */
217 static inline void vfs_dq_sync(struct super_block *sb)
222 static inline int vfs_dq_off(struct super_block *sb, int remount)
226 if (sb->s_qcop && sb->s_qcop->quota_off)
227 ret = sb->s_qcop->quota_off(sb, -1, remount);
233 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
238 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
243 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
248 static inline int sb_any_quota_suspended(struct super_block *sb)
253 /* Does kernel know about any quota information for given sb + type? */
254 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
259 static inline int sb_any_quota_loaded(struct super_block *sb)
264 static inline int sb_has_quota_active(struct super_block *sb, int type)
269 static inline int sb_any_quota_active(struct super_block *sb)
275 * NO-OP when quota not configured.
277 #define sb_dquot_ops (NULL)
278 #define sb_quotactl_ops (NULL)
280 static inline void vfs_dq_init(struct inode *inode)
284 static inline void vfs_dq_drop(struct inode *inode)
288 static inline int vfs_dq_alloc_inode(struct inode *inode)
293 static inline void vfs_dq_free_inode(struct inode *inode)
297 static inline void vfs_dq_sync(struct super_block *sb)
301 static inline int vfs_dq_off(struct super_block *sb, int remount)
306 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
311 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
316 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
318 inode_add_bytes(inode, nr);
322 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
324 vfs_dq_prealloc_space_nodirty(inode, nr);
325 mark_inode_dirty(inode);
329 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
331 inode_add_bytes(inode, nr);
335 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
337 vfs_dq_alloc_space_nodirty(inode, nr);
338 mark_inode_dirty(inode);
342 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
344 inode_sub_bytes(inode, nr);
347 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
349 vfs_dq_free_space_nodirty(inode, nr);
350 mark_inode_dirty(inode);
353 #endif /* CONFIG_QUOTA */
355 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
357 return vfs_dq_prealloc_space_nodirty(inode,
358 nr << inode->i_sb->s_blocksize_bits);
361 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
363 return vfs_dq_prealloc_space(inode,
364 nr << inode->i_sb->s_blocksize_bits);
367 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
369 return vfs_dq_alloc_space_nodirty(inode,
370 nr << inode->i_sb->s_blocksize_bits);
373 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
375 return vfs_dq_alloc_space(inode,
376 nr << inode->i_sb->s_blocksize_bits);
379 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
381 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
384 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
386 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
390 * Define uppercase equivalents for compatibility with old function names
391 * Can go away when we think all users have been converted (15/04/2008)
393 #define DQUOT_INIT(inode) vfs_dq_init(inode)
394 #define DQUOT_DROP(inode) vfs_dq_drop(inode)
395 #define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
396 vfs_dq_prealloc_space_nodirty(inode, nr)
397 #define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
398 #define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
399 vfs_dq_alloc_space_nodirty(inode, nr)
400 #define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
401 #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
402 vfs_dq_prealloc_block_nodirty(inode, nr)
403 #define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
404 #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
405 vfs_dq_alloc_block_nodirty(inode, nr)
406 #define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
407 #define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
408 #define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
409 vfs_dq_free_space_nodirty(inode, nr)
410 #define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
411 #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
412 vfs_dq_free_block_nodirty(inode, nr)
413 #define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
414 #define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
415 #define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
416 #define DQUOT_SYNC(sb) vfs_dq_sync(sb)
417 #define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
418 #define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
420 #endif /* _LINUX_QUOTAOPS_ */