kbuild: add headerdep used to detect inclusion cycles in header files
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / quotaops.h
CommitLineData
1da177e4
LT
1/*
2 * Definitions for diskquota-operations. When diskquota is configured these
3 * macros expand to the right source-code.
4 *
5 * Author: Marco van Wieringen <mvw@planets.elm.net>
1da177e4
LT
6 */
7#ifndef _LINUX_QUOTAOPS_
8#define _LINUX_QUOTAOPS_
9
1da177e4 10#include <linux/smp_lock.h>
1da177e4
LT
11#include <linux/fs.h>
12
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13static inline struct quota_info *sb_dqopt(struct super_block *sb)
14{
15 return &sb->s_dquot;
16}
74abb989 17
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LT
18#if defined(CONFIG_QUOTA)
19
20/*
21 * declaration of quota_function calls in kernel.
22 */
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23void sync_dquots(struct super_block *sb, int type);
24
25int dquot_initialize(struct inode *inode, int type);
26int dquot_drop(struct inode *inode);
27
28int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
29int dquot_alloc_inode(const struct inode *inode, unsigned long number);
30
31int dquot_free_space(struct inode *inode, qsize_t number);
32int dquot_free_inode(const struct inode *inode, unsigned long number);
33
34int dquot_transfer(struct inode *inode, struct iattr *iattr);
35int dquot_commit(struct dquot *dquot);
36int dquot_acquire(struct dquot *dquot);
37int dquot_release(struct dquot *dquot);
38int dquot_commit_info(struct super_block *sb, int type);
39int dquot_mark_dquot_dirty(struct dquot *dquot);
40
41int vfs_quota_on(struct super_block *sb, int type, int format_id,
42 char *path, int remount);
77e69dac
AV
43int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
44 struct path *path);
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45int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
46 int format_id, int type);
47int vfs_quota_off(struct super_block *sb, int type, int remount);
48int vfs_quota_sync(struct super_block *sb, int type);
49int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
50int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
51int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
52int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
53
54void vfs_dq_drop(struct inode *inode);
55int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
56int vfs_dq_quota_on_remount(struct super_block *sb);
1da177e4 57
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58static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
59{
60 return sb_dqopt(sb)->info + type;
61}
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62
63/*
64 * Functions for checking status of quota
65 */
66
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67static inline int sb_has_quota_enabled(struct super_block *sb, int type)
68{
69 if (type == USRQUOTA)
70 return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
71 return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
72}
74abb989 73
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74static inline int sb_any_quota_enabled(struct super_block *sb)
75{
76 return sb_has_quota_enabled(sb, USRQUOTA) ||
77 sb_has_quota_enabled(sb, GRPQUOTA);
78}
74abb989 79
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JK
80static inline int sb_has_quota_suspended(struct super_block *sb, int type)
81{
82 if (type == USRQUOTA)
83 return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
84 return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
85}
74abb989 86
03b06343
JK
87static inline int sb_any_quota_suspended(struct super_block *sb)
88{
89 return sb_has_quota_suspended(sb, USRQUOTA) ||
90 sb_has_quota_suspended(sb, GRPQUOTA);
91}
74abb989 92
1da177e4
LT
93/*
94 * Operations supported for diskquotas.
95 */
96extern struct dquot_operations dquot_operations;
97extern struct quotactl_ops vfs_quotactl_ops;
98
99#define sb_dquot_ops (&dquot_operations)
100#define sb_quotactl_ops (&vfs_quotactl_ops)
101
102/* It is better to call this function outside of any transaction as it might
103 * need a lot of space in journal for dquot structure allocation. */
b85f4b87 104static inline void vfs_dq_init(struct inode *inode)
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LT
105{
106 BUG_ON(!inode->i_sb);
107 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
108 inode->i_sb->dq_op->initialize(inode, -1);
109}
110
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LT
111/* The following allocation/freeing/transfer functions *must* be called inside
112 * a transaction (deadlocks possible otherwise) */
b85f4b87 113static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
114{
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, 1) == NO_QUOTA)
118 return 1;
119 }
120 else
121 inode_add_bytes(inode, nr);
122 return 0;
123}
124
b85f4b87 125static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4
LT
126{
127 int ret;
b85f4b87 128 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
1da177e4
LT
129 mark_inode_dirty(inode);
130 return ret;
131}
132
b85f4b87 133static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
134{
135 if (sb_any_quota_enabled(inode->i_sb)) {
136 /* Used space is updated in alloc_space() */
137 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
138 return 1;
139 }
140 else
141 inode_add_bytes(inode, nr);
142 return 0;
143}
144
b85f4b87 145static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4
LT
146{
147 int ret;
b85f4b87 148 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
1da177e4
LT
149 mark_inode_dirty(inode);
150 return ret;
151}
152
b85f4b87 153static inline int vfs_dq_alloc_inode(struct inode *inode)
1da177e4
LT
154{
155 if (sb_any_quota_enabled(inode->i_sb)) {
b85f4b87 156 vfs_dq_init(inode);
1da177e4
LT
157 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
158 return 1;
159 }
160 return 0;
161}
162
b85f4b87 163static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
164{
165 if (sb_any_quota_enabled(inode->i_sb))
166 inode->i_sb->dq_op->free_space(inode, nr);
167 else
168 inode_sub_bytes(inode, nr);
169}
170
b85f4b87 171static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4 172{
b85f4b87 173 vfs_dq_free_space_nodirty(inode, nr);
1da177e4
LT
174 mark_inode_dirty(inode);
175}
176
b85f4b87 177static inline void vfs_dq_free_inode(struct inode *inode)
1da177e4
LT
178{
179 if (sb_any_quota_enabled(inode->i_sb))
180 inode->i_sb->dq_op->free_inode(inode, 1);
181}
182
1da177e4 183/* The following two functions cannot be called inside a transaction */
b85f4b87 184static inline void vfs_dq_sync(struct super_block *sb)
03f6e92b
JK
185{
186 sync_dquots(sb, -1);
187}
1da177e4 188
b85f4b87 189static inline int vfs_dq_off(struct super_block *sb, int remount)
1da177e4
LT
190{
191 int ret = -ENOSYS;
192
0ff5af83
JK
193 if (sb->s_qcop && sb->s_qcop->quota_off)
194 ret = sb->s_qcop->quota_off(sb, -1, remount);
195 return ret;
196}
197
1da177e4
LT
198#else
199
03b06343
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200static inline int sb_has_quota_enabled(struct super_block *sb, int type)
201{
202 return 0;
203}
204
205static inline int sb_any_quota_enabled(struct super_block *sb)
206{
207 return 0;
208}
209
210static inline int sb_has_quota_suspended(struct super_block *sb, int type)
211{
212 return 0;
213}
214
215static inline int sb_any_quota_suspended(struct super_block *sb)
216{
217 return 0;
218}
74abb989 219
1da177e4
LT
220/*
221 * NO-OP when quota not configured.
222 */
223#define sb_dquot_ops (NULL)
224#define sb_quotactl_ops (NULL)
50f8c370 225
b85f4b87 226static inline void vfs_dq_init(struct inode *inode)
50f8c370
AM
227{
228}
229
b85f4b87 230static inline void vfs_dq_drop(struct inode *inode)
50f8c370
AM
231{
232}
233
b85f4b87 234static inline int vfs_dq_alloc_inode(struct inode *inode)
50f8c370
AM
235{
236 return 0;
237}
238
b85f4b87 239static inline void vfs_dq_free_inode(struct inode *inode)
50f8c370
AM
240{
241}
242
b85f4b87 243static inline void vfs_dq_sync(struct super_block *sb)
50f8c370
AM
244{
245}
246
b85f4b87 247static inline int vfs_dq_off(struct super_block *sb, int remount)
50f8c370
AM
248{
249 return 0;
250}
251
b85f4b87 252static inline int vfs_dq_quota_on_remount(struct super_block *sb)
50f8c370
AM
253{
254 return 0;
255}
256
b85f4b87 257static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
50f8c370
AM
258{
259 return 0;
260}
261
b85f4b87 262static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
263{
264 inode_add_bytes(inode, nr);
265 return 0;
266}
267
b85f4b87 268static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4 269{
b85f4b87 270 vfs_dq_prealloc_space_nodirty(inode, nr);
1da177e4
LT
271 mark_inode_dirty(inode);
272 return 0;
273}
274
b85f4b87 275static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
276{
277 inode_add_bytes(inode, nr);
278 return 0;
279}
280
b85f4b87 281static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4 282{
b85f4b87 283 vfs_dq_alloc_space_nodirty(inode, nr);
1da177e4
LT
284 mark_inode_dirty(inode);
285 return 0;
286}
287
b85f4b87 288static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
289{
290 inode_sub_bytes(inode, nr);
291}
292
b85f4b87 293static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4 294{
b85f4b87 295 vfs_dq_free_space_nodirty(inode, nr);
1da177e4
LT
296 mark_inode_dirty(inode);
297}
298
299#endif /* CONFIG_QUOTA */
300
b85f4b87 301static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 302{
b85f4b87 303 return vfs_dq_prealloc_space_nodirty(inode,
03f6e92b
JK
304 nr << inode->i_sb->s_blocksize_bits);
305}
306
b85f4b87 307static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
03f6e92b 308{
b85f4b87 309 return vfs_dq_prealloc_space(inode,
03f6e92b
JK
310 nr << inode->i_sb->s_blocksize_bits);
311}
312
b85f4b87 313static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 314{
b85f4b87 315 return vfs_dq_alloc_space_nodirty(inode,
03f6e92b
JK
316 nr << inode->i_sb->s_blocksize_bits);
317}
318
b85f4b87 319static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
03f6e92b 320{
b85f4b87 321 return vfs_dq_alloc_space(inode,
03f6e92b
JK
322 nr << inode->i_sb->s_blocksize_bits);
323}
324
b85f4b87 325static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 326{
b85f4b87 327 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b
JK
328}
329
b85f4b87 330static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
03f6e92b 331{
b85f4b87 332 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b 333}
1da177e4 334
b85f4b87
JK
335/*
336 * Define uppercase equivalents for compatibility with old function names
337 * Can go away when we think all users have been converted (15/04/2008)
338 */
339#define DQUOT_INIT(inode) vfs_dq_init(inode)
340#define DQUOT_DROP(inode) vfs_dq_drop(inode)
341#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
342 vfs_dq_prealloc_space_nodirty(inode, nr)
343#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
344#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
345 vfs_dq_alloc_space_nodirty(inode, nr)
346#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
347#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
348 vfs_dq_prealloc_block_nodirty(inode, nr)
349#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
350#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
351 vfs_dq_alloc_block_nodirty(inode, nr)
352#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
353#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
354#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
355 vfs_dq_free_space_nodirty(inode, nr)
356#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
357#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
358 vfs_dq_free_block_nodirty(inode, nr)
359#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
360#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
361#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
362#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
363#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
364#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
365
1da177e4 366#endif /* _LINUX_QUOTAOPS_ */