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>
16 static inline struct quota_info *sb_dqopt(struct super_block *sb)
21 #if defined(CONFIG_QUOTA)
24 * declaration of quota_function calls in kernel.
26 void sync_dquots(struct super_block *sb, int type);
28 int dquot_initialize(struct inode *inode, int type);
29 int dquot_drop(struct inode *inode);
31 int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
32 int dquot_alloc_inode(const struct inode *inode, unsigned long number);
34 int dquot_free_space(struct inode *inode, qsize_t number);
35 int dquot_free_inode(const struct inode *inode, unsigned long number);
37 int dquot_transfer(struct inode *inode, struct iattr *iattr);
38 int dquot_commit(struct dquot *dquot);
39 int dquot_acquire(struct dquot *dquot);
40 int dquot_release(struct dquot *dquot);
41 int dquot_commit_info(struct super_block *sb, int type);
42 int dquot_mark_dquot_dirty(struct dquot *dquot);
44 int vfs_quota_on(struct super_block *sb, int type, int format_id,
45 char *path, int remount);
46 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
48 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
49 int format_id, int type);
50 int vfs_quota_off(struct super_block *sb, int type, int remount);
51 int vfs_quota_sync(struct super_block *sb, int type);
52 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
53 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
54 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
55 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
57 void vfs_dq_drop(struct inode *inode);
58 int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
59 int vfs_dq_quota_on_remount(struct super_block *sb);
61 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
63 return sb_dqopt(sb)->info + type;
67 * Functions for checking status of quota
70 static inline int sb_has_quota_enabled(struct super_block *sb, int type)
73 return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
74 return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
77 static inline int sb_any_quota_enabled(struct super_block *sb)
79 return sb_has_quota_enabled(sb, USRQUOTA) ||
80 sb_has_quota_enabled(sb, GRPQUOTA);
83 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
86 return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
87 return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
90 static inline int sb_any_quota_suspended(struct super_block *sb)
92 return sb_has_quota_suspended(sb, USRQUOTA) ||
93 sb_has_quota_suspended(sb, GRPQUOTA);
97 * Operations supported for diskquotas.
99 extern struct dquot_operations dquot_operations;
100 extern struct quotactl_ops vfs_quotactl_ops;
102 #define sb_dquot_ops (&dquot_operations)
103 #define sb_quotactl_ops (&vfs_quotactl_ops)
105 /* It is better to call this function outside of any transaction as it might
106 * need a lot of space in journal for dquot structure allocation. */
107 static inline void vfs_dq_init(struct inode *inode)
109 BUG_ON(!inode->i_sb);
110 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
111 inode->i_sb->dq_op->initialize(inode, -1);
114 /* The following allocation/freeing/transfer functions *must* be called inside
115 * a transaction (deadlocks possible otherwise) */
116 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
118 if (sb_any_quota_enabled(inode->i_sb)) {
119 /* Used space is updated in alloc_space() */
120 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
124 inode_add_bytes(inode, nr);
128 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
131 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
132 mark_inode_dirty(inode);
136 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
138 if (sb_any_quota_enabled(inode->i_sb)) {
139 /* Used space is updated in alloc_space() */
140 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
144 inode_add_bytes(inode, nr);
148 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
151 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
152 mark_inode_dirty(inode);
156 static inline int vfs_dq_alloc_inode(struct inode *inode)
158 if (sb_any_quota_enabled(inode->i_sb)) {
160 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
166 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
168 if (sb_any_quota_enabled(inode->i_sb))
169 inode->i_sb->dq_op->free_space(inode, nr);
171 inode_sub_bytes(inode, nr);
174 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
176 vfs_dq_free_space_nodirty(inode, nr);
177 mark_inode_dirty(inode);
180 static inline void vfs_dq_free_inode(struct inode *inode)
182 if (sb_any_quota_enabled(inode->i_sb))
183 inode->i_sb->dq_op->free_inode(inode, 1);
186 /* The following two functions cannot be called inside a transaction */
187 static inline void vfs_dq_sync(struct super_block *sb)
192 static inline int vfs_dq_off(struct super_block *sb, int remount)
196 if (sb->s_qcop && sb->s_qcop->quota_off)
197 ret = sb->s_qcop->quota_off(sb, -1, remount);
203 static inline int sb_has_quota_enabled(struct super_block *sb, int type)
208 static inline int sb_any_quota_enabled(struct super_block *sb)
213 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
218 static inline int sb_any_quota_suspended(struct super_block *sb)
224 * NO-OP when quota not configured.
226 #define sb_dquot_ops (NULL)
227 #define sb_quotactl_ops (NULL)
229 static inline void vfs_dq_init(struct inode *inode)
233 static inline void vfs_dq_drop(struct inode *inode)
237 static inline int vfs_dq_alloc_inode(struct inode *inode)
242 static inline void vfs_dq_free_inode(struct inode *inode)
246 static inline void vfs_dq_sync(struct super_block *sb)
250 static inline int vfs_dq_off(struct super_block *sb, int remount)
255 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
260 static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
265 static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
267 inode_add_bytes(inode, nr);
271 static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
273 vfs_dq_prealloc_space_nodirty(inode, nr);
274 mark_inode_dirty(inode);
278 static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
280 inode_add_bytes(inode, nr);
284 static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
286 vfs_dq_alloc_space_nodirty(inode, nr);
287 mark_inode_dirty(inode);
291 static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
293 inode_sub_bytes(inode, nr);
296 static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
298 vfs_dq_free_space_nodirty(inode, nr);
299 mark_inode_dirty(inode);
302 #endif /* CONFIG_QUOTA */
304 static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
306 return vfs_dq_prealloc_space_nodirty(inode,
307 nr << inode->i_sb->s_blocksize_bits);
310 static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
312 return vfs_dq_prealloc_space(inode,
313 nr << inode->i_sb->s_blocksize_bits);
316 static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
318 return vfs_dq_alloc_space_nodirty(inode,
319 nr << inode->i_sb->s_blocksize_bits);
322 static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
324 return vfs_dq_alloc_space(inode,
325 nr << inode->i_sb->s_blocksize_bits);
328 static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
330 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
333 static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
335 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
339 * Define uppercase equivalents for compatibility with old function names
340 * Can go away when we think all users have been converted (15/04/2008)
342 #define DQUOT_INIT(inode) vfs_dq_init(inode)
343 #define DQUOT_DROP(inode) vfs_dq_drop(inode)
344 #define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
345 vfs_dq_prealloc_space_nodirty(inode, nr)
346 #define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
347 #define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
348 vfs_dq_alloc_space_nodirty(inode, nr)
349 #define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
350 #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
351 vfs_dq_prealloc_block_nodirty(inode, nr)
352 #define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
353 #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
354 vfs_dq_alloc_block_nodirty(inode, nr)
355 #define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
356 #define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
357 #define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
358 vfs_dq_free_space_nodirty(inode, nr)
359 #define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
360 #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
361 vfs_dq_free_block_nodirty(inode, nr)
362 #define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
363 #define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
364 #define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
365 #define DQUOT_SYNC(sb) vfs_dq_sync(sb)
366 #define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
367 #define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
369 #endif /* _LINUX_QUOTAOPS_ */