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 && ia->ia_uid != inode->i_uid) ||
26 (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid);
29 #if defined(CONFIG_QUOTA)
32 * declaration of quota_function calls in kernel.
34 void inode_add_rsv_space(struct inode *inode, qsize_t number);
35 void inode_claim_rsv_space(struct inode *inode, qsize_t number);
36 void inode_sub_rsv_space(struct inode *inode, qsize_t number);
38 void dquot_initialize(struct inode *inode);
39 void dquot_drop(struct inode *inode);
40 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
41 void dqput(struct dquot *dquot);
42 int dquot_scan_active(struct super_block *sb,
43 int (*fn)(struct dquot *dquot, unsigned long priv),
45 struct dquot *dquot_alloc(struct super_block *sb, int type);
46 void dquot_destroy(struct dquot *dquot);
48 int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
49 void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
51 int dquot_alloc_inode(const struct inode *inode);
53 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
54 void dquot_free_inode(const struct inode *inode);
56 int dquot_disable(struct super_block *sb, int type, unsigned int flags);
57 /* Suspend quotas on remount RO */
58 static inline int dquot_suspend(struct super_block *sb, int type)
60 return dquot_disable(sb, type, DQUOT_SUSPENDED);
62 int dquot_resume(struct super_block *sb, int type);
64 int dquot_commit(struct dquot *dquot);
65 int dquot_acquire(struct dquot *dquot);
66 int dquot_release(struct dquot *dquot);
67 int dquot_commit_info(struct super_block *sb, int type);
68 int dquot_mark_dquot_dirty(struct dquot *dquot);
70 int dquot_file_open(struct inode *inode, struct file *file);
72 int dquot_quota_on(struct super_block *sb, int type, int format_id,
74 int dquot_enable(struct inode *inode, int type, int format_id,
76 int dquot_quota_on_path(struct super_block *sb, int type, int format_id,
78 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
79 int format_id, int type);
80 int dquot_quota_off(struct super_block *sb, int type);
81 int dquot_quota_sync(struct super_block *sb, int type, int wait);
82 int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
83 int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
84 int dquot_get_dqblk(struct super_block *sb, int type, qid_t id,
85 struct fs_disk_quota *di);
86 int dquot_set_dqblk(struct super_block *sb, int type, qid_t id,
87 struct fs_disk_quota *di);
89 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
90 int dquot_transfer(struct inode *inode, struct iattr *iattr);
92 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
94 return sb_dqopt(sb)->info + type;
98 * Functions for checking status of quota
101 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
103 return sb_dqopt(sb)->flags &
104 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
107 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
109 return sb_dqopt(sb)->flags &
110 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
113 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
115 return sb_dqopt(sb)->flags &
116 dquot_state_flag(DQUOT_SUSPENDED, type);
119 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
121 unsigned type, tmsk = 0;
122 for (type = 0; type < MAXQUOTAS; type++)
123 tmsk |= sb_has_quota_suspended(sb, type) << type;
127 /* Does kernel know about any quota information for given sb + type? */
128 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
130 /* Currently if anything is on, then quota usage is on as well */
131 return sb_has_quota_usage_enabled(sb, type);
134 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
136 unsigned type, tmsk = 0;
137 for (type = 0; type < MAXQUOTAS; type++)
138 tmsk |= sb_has_quota_loaded(sb, type) << type;
142 static inline bool sb_has_quota_active(struct super_block *sb, int type)
144 return sb_has_quota_loaded(sb, type) &&
145 !sb_has_quota_suspended(sb, type);
148 static inline unsigned sb_any_quota_active(struct super_block *sb)
150 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
154 * Operations supported for diskquotas.
156 extern const struct dquot_operations dquot_operations;
157 extern const struct quotactl_ops dquot_quotactl_ops;
161 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
166 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
171 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
176 static inline int sb_any_quota_suspended(struct super_block *sb)
181 /* Does kernel know about any quota information for given sb + type? */
182 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
187 static inline int sb_any_quota_loaded(struct super_block *sb)
192 static inline int sb_has_quota_active(struct super_block *sb, int type)
197 static inline int sb_any_quota_active(struct super_block *sb)
202 static inline void dquot_initialize(struct inode *inode)
206 static inline void dquot_drop(struct inode *inode)
210 static inline int dquot_alloc_inode(const struct inode *inode)
215 static inline void dquot_free_inode(const struct inode *inode)
219 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
224 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
227 if (!(flags & DQUOT_SPACE_RESERVE))
228 inode_add_bytes(inode, number);
232 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
235 if (!(flags & DQUOT_SPACE_RESERVE))
236 inode_sub_bytes(inode, number);
239 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
241 inode_add_bytes(inode, number);
245 static inline int dquot_disable(struct super_block *sb, int type,
251 static inline int dquot_suspend(struct super_block *sb, int type)
256 static inline int dquot_resume(struct super_block *sb, int type)
261 #define dquot_file_open generic_file_open
263 #endif /* CONFIG_QUOTA */
265 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
267 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
270 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
272 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
273 mark_inode_dirty(inode);
276 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
280 ret = dquot_alloc_space_nodirty(inode, nr);
282 mark_inode_dirty(inode);
286 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
288 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
291 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
293 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
296 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
298 return dquot_alloc_space(inode, nr << inode->i_blkbits);
301 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
303 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
306 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
310 ret = dquot_prealloc_block_nodirty(inode, nr);
312 mark_inode_dirty(inode);
316 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
318 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
319 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
322 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
326 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
328 mark_inode_dirty(inode);
332 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
334 __dquot_free_space(inode, nr, 0);
337 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
339 dquot_free_space_nodirty(inode, nr);
340 mark_inode_dirty(inode);
343 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
345 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
348 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
350 dquot_free_space(inode, nr << inode->i_blkbits);
353 static inline void dquot_release_reservation_block(struct inode *inode,
356 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
359 #endif /* _LINUX_QUOTAOPS_ */