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 * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
10 #ifndef _LINUX_QUOTAOPS_
11 #define _LINUX_QUOTAOPS_
13 #include <linux/smp_lock.h>
17 #if defined(CONFIG_QUOTA)
20 * declaration of quota_function calls in kernel.
22 extern void sync_dquots(struct super_block *sb, int type);
24 extern int dquot_initialize(struct inode *inode, int type);
25 extern int dquot_drop(struct inode *inode);
27 extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
28 extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
30 extern int dquot_free_space(struct inode *inode, qsize_t number);
31 extern int dquot_free_inode(const struct inode *inode, unsigned long number);
33 extern int dquot_transfer(struct inode *inode, struct iattr *iattr);
34 extern int dquot_commit(struct dquot *dquot);
35 extern int dquot_acquire(struct dquot *dquot);
36 extern int dquot_release(struct dquot *dquot);
37 extern int dquot_commit_info(struct super_block *sb, int type);
38 extern int dquot_mark_dquot_dirty(struct dquot *dquot);
40 extern int vfs_quota_on(struct super_block *sb, int type, int format_id,
41 char *path, int remount);
42 extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
43 int format_id, int type);
44 extern int vfs_quota_off(struct super_block *sb, int type, int remount);
45 extern int vfs_quota_sync(struct super_block *sb, int type);
46 extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
47 extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
48 extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
49 extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
52 * Operations supported for diskquotas.
54 extern struct dquot_operations dquot_operations;
55 extern struct quotactl_ops vfs_quotactl_ops;
57 #define sb_dquot_ops (&dquot_operations)
58 #define sb_quotactl_ops (&vfs_quotactl_ops)
60 /* It is better to call this function outside of any transaction as it might
61 * need a lot of space in journal for dquot structure allocation. */
62 static inline void DQUOT_INIT(struct inode *inode)
65 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
66 inode->i_sb->dq_op->initialize(inode, -1);
69 /* The same as with DQUOT_INIT */
70 static inline void DQUOT_DROP(struct inode *inode)
72 /* Here we can get arbitrary inode from clear_inode() so we have
73 * to be careful. OTOH we don't need locking as quota operations
74 * are allowed to change only at mount time */
75 if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
76 && inode->i_sb->dq_op->drop) {
78 /* Test before calling to rule out calls from proc and such
79 * where we are not allowed to block. Note that this is
80 * actually reliable test even without the lock - the caller
81 * must assure that nobody can come after the DQUOT_DROP and
82 * add quota pointers back anyway */
83 for (cnt = 0; cnt < MAXQUOTAS; cnt++)
84 if (inode->i_dquot[cnt] != NODQUOT)
87 inode->i_sb->dq_op->drop(inode);
91 /* The following allocation/freeing/transfer functions *must* be called inside
92 * a transaction (deadlocks possible otherwise) */
93 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
95 if (sb_any_quota_enabled(inode->i_sb)) {
96 /* Used space is updated in alloc_space() */
97 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
101 inode_add_bytes(inode, nr);
105 static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
108 if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
109 mark_inode_dirty(inode);
113 static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
115 if (sb_any_quota_enabled(inode->i_sb)) {
116 /* Used space is updated in alloc_space() */
117 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
121 inode_add_bytes(inode, nr);
125 static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
128 if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
129 mark_inode_dirty(inode);
133 static inline int DQUOT_ALLOC_INODE(struct inode *inode)
135 if (sb_any_quota_enabled(inode->i_sb)) {
137 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
143 static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
145 if (sb_any_quota_enabled(inode->i_sb))
146 inode->i_sb->dq_op->free_space(inode, nr);
148 inode_sub_bytes(inode, nr);
151 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
153 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
154 mark_inode_dirty(inode);
157 static inline void DQUOT_FREE_INODE(struct inode *inode)
159 if (sb_any_quota_enabled(inode->i_sb))
160 inode->i_sb->dq_op->free_inode(inode, 1);
163 static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
165 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
167 if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
173 /* The following two functions cannot be called inside a transaction */
174 static inline void DQUOT_SYNC(struct super_block *sb)
179 static inline int DQUOT_OFF(struct super_block *sb, int remount)
183 if (sb->s_qcop && sb->s_qcop->quota_off)
184 ret = sb->s_qcop->quota_off(sb, -1, remount);
188 static inline int DQUOT_ON_REMOUNT(struct super_block *sb)
193 if (!sb->s_qcop || !sb->s_qcop->quota_on)
195 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
196 err = sb->s_qcop->quota_on(sb, cnt, 0, NULL, 1);
206 * NO-OP when quota not configured.
208 #define sb_dquot_ops (NULL)
209 #define sb_quotactl_ops (NULL)
211 static inline void DQUOT_INIT(struct inode *inode)
215 static inline void DQUOT_DROP(struct inode *inode)
219 static inline int DQUOT_ALLOC_INODE(struct inode *inode)
224 static inline void DQUOT_FREE_INODE(struct inode *inode)
228 static inline void DQUOT_SYNC(struct super_block *sb)
232 static inline int DQUOT_OFF(struct super_block *sb, int remount)
237 static inline int DQUOT_ON_REMOUNT(struct super_block *sb)
242 static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
247 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
249 inode_add_bytes(inode, nr);
253 static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
255 DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
256 mark_inode_dirty(inode);
260 static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
262 inode_add_bytes(inode, nr);
266 static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
268 DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
269 mark_inode_dirty(inode);
273 static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
275 inode_sub_bytes(inode, nr);
278 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
280 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
281 mark_inode_dirty(inode);
284 #endif /* CONFIG_QUOTA */
286 static inline int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
288 return DQUOT_PREALLOC_SPACE_NODIRTY(inode,
289 nr << inode->i_sb->s_blocksize_bits);
292 static inline int DQUOT_PREALLOC_BLOCK(struct inode *inode, qsize_t nr)
294 return DQUOT_PREALLOC_SPACE(inode,
295 nr << inode->i_sb->s_blocksize_bits);
298 static inline int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
300 return DQUOT_ALLOC_SPACE_NODIRTY(inode,
301 nr << inode->i_sb->s_blocksize_bits);
304 static inline int DQUOT_ALLOC_BLOCK(struct inode *inode, qsize_t nr)
306 return DQUOT_ALLOC_SPACE(inode,
307 nr << inode->i_sb->s_blocksize_bits);
310 static inline void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
312 DQUOT_FREE_SPACE_NODIRTY(inode, nr << inode->i_sb->s_blocksize_bits);
315 static inline void DQUOT_FREE_BLOCK(struct inode *inode, qsize_t nr)
317 DQUOT_FREE_SPACE(inode, nr << inode->i_sb->s_blocksize_bits);
320 #endif /* _LINUX_QUOTAOPS_ */