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, char *path);
41 extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
42 int format_id, int type);
43 extern int vfs_quota_off(struct super_block *sb, int type);
44 extern int vfs_quota_sync(struct super_block *sb, int type);
45 extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
46 extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
47 extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
48 extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
51 * Operations supported for diskquotas.
53 extern struct dquot_operations dquot_operations;
54 extern struct quotactl_ops vfs_quotactl_ops;
56 #define sb_dquot_ops (&dquot_operations)
57 #define sb_quotactl_ops (&vfs_quotactl_ops)
59 /* It is better to call this function outside of any transaction as it might
60 * need a lot of space in journal for dquot structure allocation. */
61 static inline void DQUOT_INIT(struct inode *inode)
64 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
65 inode->i_sb->dq_op->initialize(inode, -1);
68 /* The same as with DQUOT_INIT */
69 static inline void DQUOT_DROP(struct inode *inode)
71 /* Here we can get arbitrary inode from clear_inode() so we have
72 * to be careful. OTOH we don't need locking as quota operations
73 * are allowed to change only at mount time */
74 if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
75 && inode->i_sb->dq_op->drop) {
77 /* Test before calling to rule out calls from proc and such
78 * where we are not allowed to block. Note that this is
79 * actually reliable test even without the lock - the caller
80 * must assure that nobody can come after the DQUOT_DROP and
81 * add quota pointers back anyway */
82 for (cnt = 0; cnt < MAXQUOTAS; cnt++)
83 if (inode->i_dquot[cnt] != NODQUOT)
86 inode->i_sb->dq_op->drop(inode);
90 /* The following allocation/freeing/transfer functions *must* be called inside
91 * a transaction (deadlocks possible otherwise) */
92 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
94 if (sb_any_quota_enabled(inode->i_sb)) {
95 /* Used space is updated in alloc_space() */
96 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
100 inode_add_bytes(inode, nr);
104 static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
107 if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
108 mark_inode_dirty(inode);
112 static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
114 if (sb_any_quota_enabled(inode->i_sb)) {
115 /* Used space is updated in alloc_space() */
116 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
120 inode_add_bytes(inode, nr);
124 static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
127 if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
128 mark_inode_dirty(inode);
132 static inline int DQUOT_ALLOC_INODE(struct inode *inode)
134 if (sb_any_quota_enabled(inode->i_sb)) {
136 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
142 static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
144 if (sb_any_quota_enabled(inode->i_sb))
145 inode->i_sb->dq_op->free_space(inode, nr);
147 inode_sub_bytes(inode, nr);
150 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
152 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
153 mark_inode_dirty(inode);
156 static inline void DQUOT_FREE_INODE(struct inode *inode)
158 if (sb_any_quota_enabled(inode->i_sb))
159 inode->i_sb->dq_op->free_inode(inode, 1);
162 static inline int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
164 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
166 if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
172 /* The following two functions cannot be called inside a transaction */
173 static inline void DQUOT_SYNC(struct super_block *sb)
178 static inline int DQUOT_OFF(struct super_block *sb)
182 if (sb_any_quota_enabled(sb) && sb->s_qcop && sb->s_qcop->quota_off)
183 ret = sb->s_qcop->quota_off(sb, -1);
190 * NO-OP when quota not configured.
192 #define sb_dquot_ops (NULL)
193 #define sb_quotactl_ops (NULL)
194 #define DQUOT_INIT(inode) do { } while(0)
195 #define DQUOT_DROP(inode) do { } while(0)
196 #define DQUOT_ALLOC_INODE(inode) (0)
197 #define DQUOT_FREE_INODE(inode) do { } while(0)
198 #define DQUOT_SYNC(sb) do { } while(0)
199 #define DQUOT_OFF(sb) (0)
200 #define DQUOT_TRANSFER(inode, iattr) (0)
201 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
203 inode_add_bytes(inode, nr);
207 static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
209 DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
210 mark_inode_dirty(inode);
214 static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
216 inode_add_bytes(inode, nr);
220 static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
222 DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
223 mark_inode_dirty(inode);
227 static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
229 inode_sub_bytes(inode, nr);
232 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
234 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
235 mark_inode_dirty(inode);
238 #endif /* CONFIG_QUOTA */
240 static inline int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
242 return DQUOT_PREALLOC_SPACE_NODIRTY(inode,
243 nr << inode->i_sb->s_blocksize_bits);
246 static inline int DQUOT_PREALLOC_BLOCK(struct inode *inode, qsize_t nr)
248 return DQUOT_PREALLOC_SPACE(inode,
249 nr << inode->i_sb->s_blocksize_bits);
252 static inline int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
254 return DQUOT_ALLOC_SPACE_NODIRTY(inode,
255 nr << inode->i_sb->s_blocksize_bits);
258 static inline int DQUOT_ALLOC_BLOCK(struct inode *inode, qsize_t nr)
260 return DQUOT_ALLOC_SPACE(inode,
261 nr << inode->i_sb->s_blocksize_bits);
264 static inline void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, qsize_t nr)
266 DQUOT_FREE_SPACE_NODIRTY(inode, nr << inode->i_sb->s_blocksize_bits);
269 static inline void DQUOT_FREE_BLOCK(struct inode *inode, qsize_t nr)
271 DQUOT_FREE_SPACE(inode, nr << inode->i_sb->s_blocksize_bits);
274 #endif /* _LINUX_QUOTAOPS_ */