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_
12 #define DQUOT_SPACE_WARN 0x1
13 #define DQUOT_SPACE_RESERVE 0x2
14 #define DQUOT_SPACE_NOFAIL 0x4
16 static inline struct quota_info *sb_dqopt(struct super_block *sb)
21 /* i_mutex must being held */
22 static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
24 return (ia->ia_valid & ATTR_SIZE) ||
25 (ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) ||
26 (ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid));
29 #if defined(CONFIG_QUOTA)
31 #define quota_error(sb, fmt, args...) \
32 __quota_error((sb), __func__, fmt , ## args)
35 void __quota_error(struct super_block *sb, const char *func,
36 const char *fmt, ...);
39 * declaration of quota_function calls in kernel.
41 void inode_add_rsv_space(struct inode *inode, qsize_t number);
42 void inode_claim_rsv_space(struct inode *inode, qsize_t number);
43 void inode_sub_rsv_space(struct inode *inode, qsize_t number);
44 void inode_reclaim_rsv_space(struct inode *inode, qsize_t number);
46 int dquot_initialize(struct inode *inode);
47 void dquot_drop(struct inode *inode);
48 struct dquot *dqget(struct super_block *sb, struct kqid qid);
49 static inline struct dquot *dqgrab(struct dquot *dquot)
51 /* Make sure someone else has active reference to dquot */
52 WARN_ON_ONCE(!atomic_read(&dquot->dq_count));
53 WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags));
54 atomic_inc(&dquot->dq_count);
58 static inline bool dquot_is_busy(struct dquot *dquot)
60 if (test_bit(DQ_MOD_B, &dquot->dq_flags))
62 if (atomic_read(&dquot->dq_count) > 1)
67 void dqput(struct dquot *dquot);
68 int dquot_scan_active(struct super_block *sb,
69 int (*fn)(struct dquot *dquot, unsigned long priv),
71 struct dquot *dquot_alloc(struct super_block *sb, int type);
72 void dquot_destroy(struct dquot *dquot);
74 int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
75 void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
77 int dquot_alloc_inode(struct inode *inode);
79 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
80 void dquot_free_inode(struct inode *inode);
81 void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
83 int dquot_disable(struct super_block *sb, int type, unsigned int flags);
84 /* Suspend quotas on remount RO */
85 static inline int dquot_suspend(struct super_block *sb, int type)
87 return dquot_disable(sb, type, DQUOT_SUSPENDED);
89 int dquot_resume(struct super_block *sb, int type);
91 int dquot_commit(struct dquot *dquot);
92 int dquot_acquire(struct dquot *dquot);
93 int dquot_release(struct dquot *dquot);
94 int dquot_commit_info(struct super_block *sb, int type);
95 int dquot_mark_dquot_dirty(struct dquot *dquot);
97 int dquot_file_open(struct inode *inode, struct file *file);
99 int dquot_enable(struct inode *inode, int type, int format_id,
101 int dquot_quota_on(struct super_block *sb, int type, int format_id,
103 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
104 int format_id, int type);
105 int dquot_quota_off(struct super_block *sb, int type);
106 int dquot_writeback_dquots(struct super_block *sb, int type);
107 int dquot_quota_sync(struct super_block *sb, int type);
108 int dquot_get_state(struct super_block *sb, struct qc_state *state);
109 int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
110 int dquot_get_dqblk(struct super_block *sb, struct kqid id,
111 struct qc_dqblk *di);
112 int dquot_set_dqblk(struct super_block *sb, struct kqid id,
113 struct qc_dqblk *di);
115 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
116 int dquot_transfer(struct inode *inode, struct iattr *iattr);
118 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
120 return sb_dqopt(sb)->info + type;
124 * Functions for checking status of quota
127 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
129 return sb_dqopt(sb)->flags &
130 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
133 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
135 return sb_dqopt(sb)->flags &
136 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
139 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
141 return sb_dqopt(sb)->flags &
142 dquot_state_flag(DQUOT_SUSPENDED, type);
145 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
147 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
150 /* Does kernel know about any quota information for given sb + type? */
151 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
153 /* Currently if anything is on, then quota usage is on as well */
154 return sb_has_quota_usage_enabled(sb, type);
157 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
159 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
162 static inline bool sb_has_quota_active(struct super_block *sb, int type)
164 return sb_has_quota_loaded(sb, type) &&
165 !sb_has_quota_suspended(sb, type);
169 * Operations supported for diskquotas.
171 extern const struct dquot_operations dquot_operations;
172 extern const struct quotactl_ops dquot_quotactl_ops;
173 extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
177 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
182 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
187 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
192 static inline int sb_any_quota_suspended(struct super_block *sb)
197 /* Does kernel know about any quota information for given sb + type? */
198 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
203 static inline int sb_any_quota_loaded(struct super_block *sb)
208 static inline int sb_has_quota_active(struct super_block *sb, int type)
213 static inline int dquot_initialize(struct inode *inode)
218 static inline void dquot_drop(struct inode *inode)
222 static inline int dquot_alloc_inode(struct inode *inode)
227 static inline void dquot_free_inode(struct inode *inode)
231 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
236 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
239 if (!(flags & DQUOT_SPACE_RESERVE))
240 inode_add_bytes(inode, number);
244 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
247 if (!(flags & DQUOT_SPACE_RESERVE))
248 inode_sub_bytes(inode, number);
251 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
253 inode_add_bytes(inode, number);
257 static inline int dquot_reclaim_space_nodirty(struct inode *inode,
260 inode_sub_bytes(inode, number);
264 static inline int dquot_disable(struct super_block *sb, int type,
270 static inline int dquot_suspend(struct super_block *sb, int type)
275 static inline int dquot_resume(struct super_block *sb, int type)
280 #define dquot_file_open generic_file_open
282 static inline int dquot_writeback_dquots(struct super_block *sb, int type)
287 #endif /* CONFIG_QUOTA */
289 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
291 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
294 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
296 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
297 mark_inode_dirty_sync(inode);
300 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
304 ret = dquot_alloc_space_nodirty(inode, nr);
307 * Mark inode fully dirty. Since we are allocating blocks, inode
308 * would become fully dirty soon anyway and it reportedly
309 * reduces lock contention.
311 mark_inode_dirty(inode);
316 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
318 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
321 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
323 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
326 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
328 return dquot_alloc_space(inode, nr << inode->i_blkbits);
331 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
333 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
336 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
340 ret = dquot_prealloc_block_nodirty(inode, nr);
342 mark_inode_dirty_sync(inode);
346 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
348 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
349 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
352 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
356 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
358 mark_inode_dirty_sync(inode);
362 static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
364 dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
365 mark_inode_dirty_sync(inode);
368 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
370 __dquot_free_space(inode, nr, 0);
373 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
375 dquot_free_space_nodirty(inode, nr);
376 mark_inode_dirty_sync(inode);
379 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
381 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
384 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
386 dquot_free_space(inode, nr << inode->i_blkbits);
389 static inline void dquot_release_reservation_block(struct inode *inode,
392 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
395 unsigned int qtype_enforce_flag(int type);
397 #endif /* _LINUX_QUOTAOPS_ */