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_get_next_id(struct super_block *sb, struct kqid *qid);
96 int dquot_mark_dquot_dirty(struct dquot *dquot);
98 int dquot_file_open(struct inode *inode, struct file *file);
100 int dquot_enable(struct inode *inode, int type, int format_id,
102 int dquot_quota_on(struct super_block *sb, int type, int format_id,
104 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
105 int format_id, int type);
106 int dquot_quota_off(struct super_block *sb, int type);
107 int dquot_writeback_dquots(struct super_block *sb, int type);
108 int dquot_quota_sync(struct super_block *sb, int type);
109 int dquot_get_state(struct super_block *sb, struct qc_state *state);
110 int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
111 int dquot_get_dqblk(struct super_block *sb, struct kqid id,
112 struct qc_dqblk *di);
113 int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id,
114 struct qc_dqblk *di);
115 int dquot_set_dqblk(struct super_block *sb, struct kqid id,
116 struct qc_dqblk *di);
118 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
119 int dquot_transfer(struct inode *inode, struct iattr *iattr);
121 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
123 return sb_dqopt(sb)->info + type;
127 * Functions for checking status of quota
130 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
132 return sb_dqopt(sb)->flags &
133 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
136 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
138 return sb_dqopt(sb)->flags &
139 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
142 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
144 return sb_dqopt(sb)->flags &
145 dquot_state_flag(DQUOT_SUSPENDED, type);
148 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
150 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
153 /* Does kernel know about any quota information for given sb + type? */
154 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
156 /* Currently if anything is on, then quota usage is on as well */
157 return sb_has_quota_usage_enabled(sb, type);
160 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
162 return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
165 static inline bool sb_has_quota_active(struct super_block *sb, int type)
167 return sb_has_quota_loaded(sb, type) &&
168 !sb_has_quota_suspended(sb, type);
172 * Operations supported for diskquotas.
174 extern const struct dquot_operations dquot_operations;
175 extern const struct quotactl_ops dquot_quotactl_ops;
176 extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
180 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
185 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
190 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
195 static inline int sb_any_quota_suspended(struct super_block *sb)
200 /* Does kernel know about any quota information for given sb + type? */
201 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
206 static inline int sb_any_quota_loaded(struct super_block *sb)
211 static inline int sb_has_quota_active(struct super_block *sb, int type)
216 static inline int dquot_initialize(struct inode *inode)
221 static inline void dquot_drop(struct inode *inode)
225 static inline int dquot_alloc_inode(struct inode *inode)
230 static inline void dquot_free_inode(struct inode *inode)
234 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
239 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
242 if (!(flags & DQUOT_SPACE_RESERVE))
243 inode_add_bytes(inode, number);
247 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
250 if (!(flags & DQUOT_SPACE_RESERVE))
251 inode_sub_bytes(inode, number);
254 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
256 inode_add_bytes(inode, number);
260 static inline int dquot_reclaim_space_nodirty(struct inode *inode,
263 inode_sub_bytes(inode, number);
267 static inline int dquot_disable(struct super_block *sb, int type,
273 static inline int dquot_suspend(struct super_block *sb, int type)
278 static inline int dquot_resume(struct super_block *sb, int type)
283 #define dquot_file_open generic_file_open
285 static inline int dquot_writeback_dquots(struct super_block *sb, int type)
290 #endif /* CONFIG_QUOTA */
292 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
294 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
297 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
299 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
300 mark_inode_dirty_sync(inode);
303 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
307 ret = dquot_alloc_space_nodirty(inode, nr);
310 * Mark inode fully dirty. Since we are allocating blocks, inode
311 * would become fully dirty soon anyway and it reportedly
312 * reduces lock contention.
314 mark_inode_dirty(inode);
319 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
321 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
324 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
326 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
329 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
331 return dquot_alloc_space(inode, nr << inode->i_blkbits);
334 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
336 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
339 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
343 ret = dquot_prealloc_block_nodirty(inode, nr);
345 mark_inode_dirty_sync(inode);
349 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
351 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
352 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
355 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
359 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
361 mark_inode_dirty_sync(inode);
365 static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
367 dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
368 mark_inode_dirty_sync(inode);
371 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
373 __dquot_free_space(inode, nr, 0);
376 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
378 dquot_free_space_nodirty(inode, nr);
379 mark_inode_dirty_sync(inode);
382 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
384 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
387 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
389 dquot_free_space(inode, nr << inode->i_blkbits);
392 static inline void dquot_release_reservation_block(struct inode *inode,
395 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
398 unsigned int qtype_enforce_flag(int type);
400 #endif /* _LINUX_QUOTAOPS_ */