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_commit(struct dquot *dquot);
57 int dquot_acquire(struct dquot *dquot);
58 int dquot_release(struct dquot *dquot);
59 int dquot_commit_info(struct super_block *sb, int type);
60 int dquot_mark_dquot_dirty(struct dquot *dquot);
62 int dquot_file_open(struct inode *inode, struct file *file);
64 int vfs_quota_on(struct super_block *sb, int type, int format_id,
65 char *path, int remount);
66 int vfs_quota_enable(struct inode *inode, int type, int format_id,
68 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
70 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
71 int format_id, int type);
72 int vfs_quota_off(struct super_block *sb, int type, int remount);
73 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
74 int vfs_quota_sync(struct super_block *sb, int type, int wait);
75 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
76 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
77 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id,
78 struct fs_disk_quota *di);
79 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
80 struct fs_disk_quota *di);
82 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
83 int dquot_transfer(struct inode *inode, struct iattr *iattr);
84 int vfs_dq_quota_on_remount(struct super_block *sb);
86 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
88 return sb_dqopt(sb)->info + type;
92 * Functions for checking status of quota
95 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
97 return sb_dqopt(sb)->flags &
98 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
101 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
103 return sb_dqopt(sb)->flags &
104 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
107 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
109 return sb_dqopt(sb)->flags &
110 dquot_state_flag(DQUOT_SUSPENDED, type);
113 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
115 unsigned type, tmsk = 0;
116 for (type = 0; type < MAXQUOTAS; type++)
117 tmsk |= sb_has_quota_suspended(sb, type) << type;
121 /* Does kernel know about any quota information for given sb + type? */
122 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
124 /* Currently if anything is on, then quota usage is on as well */
125 return sb_has_quota_usage_enabled(sb, type);
128 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
130 unsigned type, tmsk = 0;
131 for (type = 0; type < MAXQUOTAS; type++)
132 tmsk |= sb_has_quota_loaded(sb, type) << type;
136 static inline bool sb_has_quota_active(struct super_block *sb, int type)
138 return sb_has_quota_loaded(sb, type) &&
139 !sb_has_quota_suspended(sb, type);
142 static inline unsigned sb_any_quota_active(struct super_block *sb)
144 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
148 * Operations supported for diskquotas.
150 extern const struct dquot_operations dquot_operations;
151 extern const struct quotactl_ops vfs_quotactl_ops;
153 #define sb_dquot_ops (&dquot_operations)
154 #define sb_quotactl_ops (&vfs_quotactl_ops)
156 /* Cannot be called inside a transaction */
157 static inline int vfs_dq_off(struct super_block *sb, int remount)
161 if (sb->s_qcop && sb->s_qcop->quota_off)
162 ret = sb->s_qcop->quota_off(sb, -1, remount);
168 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
173 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
178 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
183 static inline int sb_any_quota_suspended(struct super_block *sb)
188 /* Does kernel know about any quota information for given sb + type? */
189 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
194 static inline int sb_any_quota_loaded(struct super_block *sb)
199 static inline int sb_has_quota_active(struct super_block *sb, int type)
204 static inline int sb_any_quota_active(struct super_block *sb)
210 * NO-OP when quota not configured.
212 #define sb_dquot_ops (NULL)
213 #define sb_quotactl_ops (NULL)
215 static inline void dquot_initialize(struct inode *inode)
219 static inline void dquot_drop(struct inode *inode)
223 static inline int dquot_alloc_inode(const struct inode *inode)
228 static inline void dquot_free_inode(const struct inode *inode)
232 static inline int vfs_dq_off(struct super_block *sb, int remount)
237 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
242 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
247 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
250 if (!(flags & DQUOT_SPACE_RESERVE))
251 inode_add_bytes(inode, number);
255 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
258 if (!(flags & DQUOT_SPACE_RESERVE))
259 inode_sub_bytes(inode, number);
262 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
264 inode_add_bytes(inode, number);
268 #define dquot_file_open generic_file_open
270 #endif /* CONFIG_QUOTA */
272 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
274 return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
277 static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
279 __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
280 mark_inode_dirty(inode);
283 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
287 ret = dquot_alloc_space_nodirty(inode, nr);
289 mark_inode_dirty(inode);
293 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
295 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
298 static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
300 dquot_alloc_space_nofail(inode, nr << inode->i_blkbits);
303 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
305 return dquot_alloc_space(inode, nr << inode->i_blkbits);
308 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
310 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0);
313 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
317 ret = dquot_prealloc_block_nodirty(inode, nr);
319 mark_inode_dirty(inode);
323 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
325 return __dquot_alloc_space(inode, nr << inode->i_blkbits,
326 DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
329 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
333 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
335 mark_inode_dirty(inode);
339 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
341 __dquot_free_space(inode, nr, 0);
344 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
346 dquot_free_space_nodirty(inode, nr);
347 mark_inode_dirty(inode);
350 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
352 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
355 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
357 dquot_free_space(inode, nr << inode->i_blkbits);
360 static inline void dquot_release_reservation_block(struct inode *inode,
363 __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE);
366 #endif /* _LINUX_QUOTAOPS_ */