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 && ia->ia_size != inode->i_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 void dquot_initialize(struct inode *inode);
47 void dquot_drop(struct inode *inode);
48 struct dquot *dqget(struct super_block *sb, struct kqid qid);
49 void dqput(struct dquot *dquot);
50 int dquot_scan_active(struct super_block *sb,
51 int (*fn)(struct dquot *dquot, unsigned long priv),
53 struct dquot *dquot_alloc(struct super_block *sb, int type);
54 void dquot_destroy(struct dquot *dquot);
56 int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
57 void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
59 int dquot_alloc_inode(const struct inode *inode);
61 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
62 void dquot_free_inode(const struct inode *inode);
63 void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
65 int dquot_disable(struct super_block *sb, int type, unsigned int flags);
66 /* Suspend quotas on remount RO */
67 static inline int dquot_suspend(struct super_block *sb, int type)
69 return dquot_disable(sb, type, DQUOT_SUSPENDED);
71 int dquot_resume(struct super_block *sb, int type);
73 int dquot_commit(struct dquot *dquot);
74 int dquot_acquire(struct dquot *dquot);
75 int dquot_release(struct dquot *dquot);
76 int dquot_commit_info(struct super_block *sb, int type);
77 int dquot_mark_dquot_dirty(struct dquot *dquot);
79 int dquot_file_open(struct inode *inode, struct file *file);
81 int dquot_enable(struct inode *inode, int type, int format_id,
83 int dquot_quota_on(struct super_block *sb, int type, int format_id,
85 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
86 int format_id, int type);
87 int dquot_quota_off(struct super_block *sb, int type);
88 int dquot_writeback_dquots(struct super_block *sb, int type);
89 int dquot_quota_sync(struct super_block *sb, int type);
90 int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
91 int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
92 int dquot_get_dqblk(struct super_block *sb, struct kqid id,
93 struct fs_disk_quota *di);
94 int dquot_set_dqblk(struct super_block *sb, struct kqid id,
95 struct fs_disk_quota *di);
97 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
98 int dquot_transfer(struct inode *inode, struct iattr *iattr);
100 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
102 return sb_dqopt(sb)->info + type;
106 * Functions for checking status of quota
109 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
111 return sb_dqopt(sb)->flags &
112 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
115 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
117 return sb_dqopt(sb)->flags &
118 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
121 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
123 return sb_dqopt(sb)->flags &
124 dquot_state_flag(DQUOT_SUSPENDED, type);
127 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
129 unsigned type, tmsk = 0;
130 for (type = 0; type < MAXQUOTAS; type++)
131 tmsk |= sb_has_quota_suspended(sb, type) << type;
135 /* Does kernel know about any quota information for given sb + type? */
136 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
138 /* Currently if anything is on, then quota usage is on as well */
139 return sb_has_quota_usage_enabled(sb, type);
142 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
144 unsigned type, tmsk = 0;
145 for (type = 0; type < MAXQUOTAS; type++)
146 tmsk |= sb_has_quota_loaded(sb, type) << type;
150 static inline bool sb_has_quota_active(struct super_block *sb, int type)
152 return sb_has_quota_loaded(sb, type) &&
153 !sb_has_quota_suspended(sb, type);
157 * Operations supported for diskquotas.
159 extern const struct dquot_operations dquot_operations;
160 extern const struct quotactl_ops dquot_quotactl_ops;
164 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
169 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
174 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
179 static inline int sb_any_quota_suspended(struct super_block *sb)
184 /* Does kernel know about any quota information for given sb + type? */
185 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
190 static inline int sb_any_quota_loaded(struct super_block *sb)
195 static inline int sb_has_quota_active(struct super_block *sb, int type)
200 static inline void dquot_initialize(struct inode *inode)
204 static inline void dquot_drop(struct inode *inode)
208 static inline int dquot_alloc_inode(const struct inode *inode)
213 static inline void dquot_free_inode(const struct inode *inode)
217 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
222 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
225 if (!(flags & DQUOT_SPACE_RESERVE))
226 inode_add_bytes(inode, number);
230 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
233 if (!(flags & DQUOT_SPACE_RESERVE))
234 inode_sub_bytes(inode, number);
237 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
239 inode_add_bytes(inode, number);
243 static inline int dquot_reclaim_space_nodirty(struct inode *inode,
246 inode_sub_bytes(inode, number);
250 static inline int dquot_disable(struct super_block *sb, int type,
256 static inline int dquot_suspend(struct super_block *sb, int type)
261 static inline int dquot_resume(struct super_block *sb, int type)
266 #define dquot_file_open generic_file_open
268 static inline int dquot_writeback_dquots(struct super_block *sb, int type)
273 #endif /* CONFIG_QUOTA */
275 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
277 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
280 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
282 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
283 mark_inode_dirty_sync(inode);
286 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
290 ret = dquot_alloc_space_nodirty(inode, nr);
293 * Mark inode fully dirty. Since we are allocating blocks, inode
294 * would become fully dirty soon anyway and it reportedly
295 * reduces lock contention.
297 mark_inode_dirty(inode);
302 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
304 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
307 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
309 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
312 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
314 return dquot_alloc_space(inode, nr << inode->i_blkbits);
317 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
319 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
322 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
326 ret = dquot_prealloc_block_nodirty(inode, nr);
328 mark_inode_dirty_sync(inode);
332 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
334 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
335 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
338 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
342 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
344 mark_inode_dirty_sync(inode);
348 static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
350 dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
351 mark_inode_dirty_sync(inode);
354 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
356 __dquot_free_space(inode, nr, 0);
359 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
361 dquot_free_space_nodirty(inode, nr);
362 mark_inode_dirty_sync(inode);
365 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
367 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
370 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
372 dquot_free_space(inode, nr << inode->i_blkbits);
375 static inline void dquot_release_reservation_block(struct inode *inode,
378 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
381 #endif /* _LINUX_QUOTAOPS_ */