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 static inline struct quota_info *sb_dqopt(struct super_block *sb)
17 /* i_mutex must being held */
18 static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
20 return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) ||
21 (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) ||
22 (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid);
25 #if defined(CONFIG_QUOTA)
28 * declaration of quota_function calls in kernel.
30 void inode_add_rsv_space(struct inode *inode, qsize_t number);
31 void inode_claim_rsv_space(struct inode *inode, qsize_t number);
32 void inode_sub_rsv_space(struct inode *inode, qsize_t number);
34 void dquot_initialize(struct inode *inode);
35 void dquot_drop(struct inode *inode);
36 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
37 void dqput(struct dquot *dquot);
38 int dquot_scan_active(struct super_block *sb,
39 int (*fn)(struct dquot *dquot, unsigned long priv),
41 struct dquot *dquot_alloc(struct super_block *sb, int type);
42 void dquot_destroy(struct dquot *dquot);
44 int __dquot_alloc_space(struct inode *inode, qsize_t number,
45 int warn, int reserve);
46 void __dquot_free_space(struct inode *inode, qsize_t number, int reserve);
48 int dquot_alloc_inode(const struct inode *inode);
50 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
51 void dquot_free_inode(const struct inode *inode);
53 int dquot_disable(struct super_block *sb, int type, unsigned int flags);
54 /* Suspend quotas on remount RO */
55 static inline int dquot_suspend(struct super_block *sb, int type)
57 return dquot_disable(sb, type, DQUOT_SUSPENDED);
59 int dquot_resume(struct super_block *sb, int type);
61 int dquot_commit(struct dquot *dquot);
62 int dquot_acquire(struct dquot *dquot);
63 int dquot_release(struct dquot *dquot);
64 int dquot_commit_info(struct super_block *sb, int type);
65 int dquot_mark_dquot_dirty(struct dquot *dquot);
67 int dquot_file_open(struct inode *inode, struct file *file);
69 int vfs_quota_on(struct super_block *sb, int type, int format_id,
71 int vfs_quota_enable(struct inode *inode, int type, int format_id,
73 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
75 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
76 int format_id, int type);
77 int vfs_quota_off(struct super_block *sb, int type);
78 int vfs_quota_sync(struct super_block *sb, int type, int wait);
79 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
80 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
81 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id,
82 struct fs_disk_quota *di);
83 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
84 struct fs_disk_quota *di);
86 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
87 int dquot_transfer(struct inode *inode, struct iattr *iattr);
89 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
91 return sb_dqopt(sb)->info + type;
95 * Functions for checking status of quota
98 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
100 return sb_dqopt(sb)->flags &
101 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
104 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
106 return sb_dqopt(sb)->flags &
107 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
110 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
112 return sb_dqopt(sb)->flags &
113 dquot_state_flag(DQUOT_SUSPENDED, type);
116 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
118 unsigned type, tmsk = 0;
119 for (type = 0; type < MAXQUOTAS; type++)
120 tmsk |= sb_has_quota_suspended(sb, type) << type;
124 /* Does kernel know about any quota information for given sb + type? */
125 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
127 /* Currently if anything is on, then quota usage is on as well */
128 return sb_has_quota_usage_enabled(sb, type);
131 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
133 unsigned type, tmsk = 0;
134 for (type = 0; type < MAXQUOTAS; type++)
135 tmsk |= sb_has_quota_loaded(sb, type) << type;
139 static inline bool sb_has_quota_active(struct super_block *sb, int type)
141 return sb_has_quota_loaded(sb, type) &&
142 !sb_has_quota_suspended(sb, type);
145 static inline unsigned sb_any_quota_active(struct super_block *sb)
147 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
151 * Operations supported for diskquotas.
153 extern const struct dquot_operations dquot_operations;
154 extern const struct quotactl_ops vfs_quotactl_ops;
156 #define sb_dquot_ops (&dquot_operations)
157 #define sb_quotactl_ops (&vfs_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)
203 * NO-OP when quota not configured.
205 #define sb_dquot_ops (NULL)
206 #define sb_quotactl_ops (NULL)
208 static inline void dquot_initialize(struct inode *inode)
212 static inline void dquot_drop(struct inode *inode)
216 static inline int dquot_alloc_inode(const struct inode *inode)
221 static inline void dquot_free_inode(const struct inode *inode)
225 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
230 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
231 int warn, int reserve)
234 inode_add_bytes(inode, number);
238 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
242 inode_sub_bytes(inode, number);
245 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
247 inode_add_bytes(inode, number);
251 static inline int dquot_disable(struct super_block *sb, int type,
257 static inline int dquot_suspend(struct super_block *sb, int type)
262 static inline int dquot_resume(struct super_block *sb, int type)
267 #define dquot_file_open generic_file_open
269 #endif /* CONFIG_QUOTA */
271 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
273 return __dquot_alloc_space(inode, nr, 1, 0);
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 int dquot_alloc_block(struct inode *inode, qsize_t nr)
293 return dquot_alloc_space(inode, nr << inode->i_blkbits);
296 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
298 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
301 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
305 ret = dquot_prealloc_block_nodirty(inode, nr);
307 mark_inode_dirty(inode);
311 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
313 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
316 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
320 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
322 mark_inode_dirty(inode);
326 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
328 __dquot_free_space(inode, nr, 0);
331 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
333 dquot_free_space_nodirty(inode, nr);
334 mark_inode_dirty(inode);
337 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
339 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
342 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
344 dquot_free_space(inode, nr << inode->i_blkbits);
347 static inline void dquot_release_reservation_block(struct inode *inode,
350 __dquot_free_space(inode, nr << inode->i_blkbits, 1);
353 #endif /* _LINUX_QUOTAOPS_ */