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 #if defined(CONFIG_QUOTA)
20 * declaration of quota_function calls in kernel.
22 void inode_add_rsv_space(struct inode *inode, qsize_t number);
23 void inode_claim_rsv_space(struct inode *inode, qsize_t number);
24 void inode_sub_rsv_space(struct inode *inode, qsize_t number);
26 int dquot_initialize(struct inode *inode, int type);
27 int dquot_drop(struct inode *inode);
28 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
29 void dqput(struct dquot *dquot);
30 int dquot_scan_active(struct super_block *sb,
31 int (*fn)(struct dquot *dquot, unsigned long priv),
33 struct dquot *dquot_alloc(struct super_block *sb, int type);
34 void dquot_destroy(struct dquot *dquot);
36 int __dquot_alloc_space(struct inode *inode, qsize_t number,
37 int warn, int reserve);
38 void __dquot_free_space(struct inode *inode, qsize_t number, int reserve);
40 int dquot_alloc_inode(const struct inode *inode);
42 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
43 void dquot_free_inode(const struct inode *inode);
45 int dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask);
46 int dquot_commit(struct dquot *dquot);
47 int dquot_acquire(struct dquot *dquot);
48 int dquot_release(struct dquot *dquot);
49 int dquot_commit_info(struct super_block *sb, int type);
50 int dquot_mark_dquot_dirty(struct dquot *dquot);
52 int vfs_quota_on(struct super_block *sb, int type, int format_id,
53 char *path, int remount);
54 int vfs_quota_enable(struct inode *inode, int type, int format_id,
56 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
58 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
59 int format_id, int type);
60 int vfs_quota_off(struct super_block *sb, int type, int remount);
61 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
62 int vfs_quota_sync(struct super_block *sb, int type, int wait);
63 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
64 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
65 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
66 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
68 void vfs_dq_drop(struct inode *inode);
69 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
70 int vfs_dq_quota_on_remount(struct super_block *sb);
72 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
74 return sb_dqopt(sb)->info + type;
78 * Functions for checking status of quota
81 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
83 return sb_dqopt(sb)->flags &
84 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
87 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
89 return sb_dqopt(sb)->flags &
90 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
93 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
95 return sb_dqopt(sb)->flags &
96 dquot_state_flag(DQUOT_SUSPENDED, type);
99 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
101 unsigned type, tmsk = 0;
102 for (type = 0; type < MAXQUOTAS; type++)
103 tmsk |= sb_has_quota_suspended(sb, type) << type;
107 /* Does kernel know about any quota information for given sb + type? */
108 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
110 /* Currently if anything is on, then quota usage is on as well */
111 return sb_has_quota_usage_enabled(sb, type);
114 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
116 unsigned type, tmsk = 0;
117 for (type = 0; type < MAXQUOTAS; type++)
118 tmsk |= sb_has_quota_loaded(sb, type) << type;
122 static inline bool sb_has_quota_active(struct super_block *sb, int type)
124 return sb_has_quota_loaded(sb, type) &&
125 !sb_has_quota_suspended(sb, type);
128 static inline unsigned sb_any_quota_active(struct super_block *sb)
130 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
134 * Operations supported for diskquotas.
136 extern const struct dquot_operations dquot_operations;
137 extern const struct quotactl_ops vfs_quotactl_ops;
139 #define sb_dquot_ops (&dquot_operations)
140 #define sb_quotactl_ops (&vfs_quotactl_ops)
142 /* It is better to call this function outside of any transaction as it might
143 * need a lot of space in journal for dquot structure allocation. */
144 static inline void vfs_dq_init(struct inode *inode)
146 BUG_ON(!inode->i_sb);
147 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
148 inode->i_sb->dq_op->initialize(inode, -1);
151 /* Cannot be called inside a transaction */
152 static inline int vfs_dq_off(struct super_block *sb, int remount)
156 if (sb->s_qcop && sb->s_qcop->quota_off)
157 ret = sb->s_qcop->quota_off(sb, -1, remount);
163 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
168 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
173 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
178 static inline int sb_any_quota_suspended(struct super_block *sb)
183 /* Does kernel know about any quota information for given sb + type? */
184 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
189 static inline int sb_any_quota_loaded(struct super_block *sb)
194 static inline int sb_has_quota_active(struct super_block *sb, int type)
199 static inline int sb_any_quota_active(struct super_block *sb)
205 * NO-OP when quota not configured.
207 #define sb_dquot_ops (NULL)
208 #define sb_quotactl_ops (NULL)
210 static inline void vfs_dq_init(struct inode *inode)
214 static inline void vfs_dq_drop(struct inode *inode)
218 static inline int dquot_alloc_inode(const struct inode *inode)
223 static inline void dquot_free_inode(const struct inode *inode)
227 static inline int vfs_dq_off(struct super_block *sb, int remount)
232 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
237 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
242 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
243 int warn, int reserve)
246 inode_add_bytes(inode, number);
250 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
254 inode_sub_bytes(inode, number);
257 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
259 inode_add_bytes(inode, number);
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, 1, 0);
270 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
274 ret = dquot_alloc_space_nodirty(inode, nr);
276 mark_inode_dirty(inode);
280 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
282 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
285 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
287 return dquot_alloc_space(inode, nr << inode->i_blkbits);
290 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
292 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
295 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
299 ret = dquot_prealloc_block_nodirty(inode, nr);
301 mark_inode_dirty(inode);
305 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
307 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
310 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
314 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
316 mark_inode_dirty(inode);
320 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
322 __dquot_free_space(inode, nr, 0);
325 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
327 dquot_free_space_nodirty(inode, nr);
328 mark_inode_dirty(inode);
331 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
333 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
336 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
338 dquot_free_space(inode, nr << inode->i_blkbits);
341 static inline void dquot_release_reservation_block(struct inode *inode,
344 __dquot_free_space(inode, nr << inode->i_blkbits, 1);
347 #endif /* _LINUX_QUOTAOPS_ */