[PATCH] clean dup2() up a bit
[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>
6 *
7 * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
8 *
9 */
10#ifndef _LINUX_QUOTAOPS_
11#define _LINUX_QUOTAOPS_
12
1da177e4 13#include <linux/smp_lock.h>
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14#include <linux/fs.h>
15
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16static inline struct quota_info *sb_dqopt(struct super_block *sb)
17{
18 return &sb->s_dquot;
19}
74abb989 20
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21#if defined(CONFIG_QUOTA)
22
23/*
24 * declaration of quota_function calls in kernel.
25 */
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26void sync_dquots(struct super_block *sb, int type);
27
28int dquot_initialize(struct inode *inode, int type);
29int dquot_drop(struct inode *inode);
30
31int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
32int dquot_alloc_inode(const struct inode *inode, unsigned long number);
33
34int dquot_free_space(struct inode *inode, qsize_t number);
35int dquot_free_inode(const struct inode *inode, unsigned long number);
36
37int dquot_transfer(struct inode *inode, struct iattr *iattr);
38int dquot_commit(struct dquot *dquot);
39int dquot_acquire(struct dquot *dquot);
40int dquot_release(struct dquot *dquot);
41int dquot_commit_info(struct super_block *sb, int type);
42int dquot_mark_dquot_dirty(struct dquot *dquot);
43
44int vfs_quota_on(struct super_block *sb, int type, int format_id,
45 char *path, int remount);
46int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
47 int format_id, int type);
48int vfs_quota_off(struct super_block *sb, int type, int remount);
49int vfs_quota_sync(struct super_block *sb, int type);
50int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
51int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
52int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
53int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
54
55void vfs_dq_drop(struct inode *inode);
56int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
57int vfs_dq_quota_on_remount(struct super_block *sb);
1da177e4 58
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59static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
60{
61 return sb_dqopt(sb)->info + type;
62}
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63
64/*
65 * Functions for checking status of quota
66 */
67
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68static inline int sb_has_quota_enabled(struct super_block *sb, int type)
69{
70 if (type == USRQUOTA)
71 return sb_dqopt(sb)->flags & DQUOT_USR_ENABLED;
72 return sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED;
73}
74abb989 74
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75static inline int sb_any_quota_enabled(struct super_block *sb)
76{
77 return sb_has_quota_enabled(sb, USRQUOTA) ||
78 sb_has_quota_enabled(sb, GRPQUOTA);
79}
74abb989 80
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81static inline int sb_has_quota_suspended(struct super_block *sb, int type)
82{
83 if (type == USRQUOTA)
84 return sb_dqopt(sb)->flags & DQUOT_USR_SUSPENDED;
85 return sb_dqopt(sb)->flags & DQUOT_GRP_SUSPENDED;
86}
74abb989 87
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88static inline int sb_any_quota_suspended(struct super_block *sb)
89{
90 return sb_has_quota_suspended(sb, USRQUOTA) ||
91 sb_has_quota_suspended(sb, GRPQUOTA);
92}
74abb989 93
1da177e4
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94/*
95 * Operations supported for diskquotas.
96 */
97extern struct dquot_operations dquot_operations;
98extern struct quotactl_ops vfs_quotactl_ops;
99
100#define sb_dquot_ops (&dquot_operations)
101#define sb_quotactl_ops (&vfs_quotactl_ops)
102
103/* It is better to call this function outside of any transaction as it might
104 * need a lot of space in journal for dquot structure allocation. */
b85f4b87 105static inline void vfs_dq_init(struct inode *inode)
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106{
107 BUG_ON(!inode->i_sb);
108 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
109 inode->i_sb->dq_op->initialize(inode, -1);
110}
111
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112/* The following allocation/freeing/transfer functions *must* be called inside
113 * a transaction (deadlocks possible otherwise) */
b85f4b87 114static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
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115{
116 if (sb_any_quota_enabled(inode->i_sb)) {
117 /* Used space is updated in alloc_space() */
118 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
119 return 1;
120 }
121 else
122 inode_add_bytes(inode, nr);
123 return 0;
124}
125
b85f4b87 126static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4
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127{
128 int ret;
b85f4b87 129 if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
1da177e4
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130 mark_inode_dirty(inode);
131 return ret;
132}
133
b85f4b87 134static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
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135{
136 if (sb_any_quota_enabled(inode->i_sb)) {
137 /* Used space is updated in alloc_space() */
138 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
139 return 1;
140 }
141 else
142 inode_add_bytes(inode, nr);
143 return 0;
144}
145
b85f4b87 146static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4
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147{
148 int ret;
b85f4b87 149 if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
1da177e4
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150 mark_inode_dirty(inode);
151 return ret;
152}
153
b85f4b87 154static inline int vfs_dq_alloc_inode(struct inode *inode)
1da177e4
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155{
156 if (sb_any_quota_enabled(inode->i_sb)) {
b85f4b87 157 vfs_dq_init(inode);
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158 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
159 return 1;
160 }
161 return 0;
162}
163
b85f4b87 164static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
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165{
166 if (sb_any_quota_enabled(inode->i_sb))
167 inode->i_sb->dq_op->free_space(inode, nr);
168 else
169 inode_sub_bytes(inode, nr);
170}
171
b85f4b87 172static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4 173{
b85f4b87 174 vfs_dq_free_space_nodirty(inode, nr);
1da177e4
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175 mark_inode_dirty(inode);
176}
177
b85f4b87 178static inline void vfs_dq_free_inode(struct inode *inode)
1da177e4
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179{
180 if (sb_any_quota_enabled(inode->i_sb))
181 inode->i_sb->dq_op->free_inode(inode, 1);
182}
183
1da177e4 184/* The following two functions cannot be called inside a transaction */
b85f4b87 185static inline void vfs_dq_sync(struct super_block *sb)
03f6e92b
JK
186{
187 sync_dquots(sb, -1);
188}
1da177e4 189
b85f4b87 190static inline int vfs_dq_off(struct super_block *sb, int remount)
1da177e4
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191{
192 int ret = -ENOSYS;
193
0ff5af83
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194 if (sb->s_qcop && sb->s_qcop->quota_off)
195 ret = sb->s_qcop->quota_off(sb, -1, remount);
196 return ret;
197}
198
1da177e4
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199#else
200
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201static inline int sb_has_quota_enabled(struct super_block *sb, int type)
202{
203 return 0;
204}
205
206static inline int sb_any_quota_enabled(struct super_block *sb)
207{
208 return 0;
209}
210
211static inline int sb_has_quota_suspended(struct super_block *sb, int type)
212{
213 return 0;
214}
215
216static inline int sb_any_quota_suspended(struct super_block *sb)
217{
218 return 0;
219}
74abb989 220
1da177e4
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221/*
222 * NO-OP when quota not configured.
223 */
224#define sb_dquot_ops (NULL)
225#define sb_quotactl_ops (NULL)
50f8c370 226
b85f4b87 227static inline void vfs_dq_init(struct inode *inode)
50f8c370
AM
228{
229}
230
b85f4b87 231static inline void vfs_dq_drop(struct inode *inode)
50f8c370
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232{
233}
234
b85f4b87 235static inline int vfs_dq_alloc_inode(struct inode *inode)
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236{
237 return 0;
238}
239
b85f4b87 240static inline void vfs_dq_free_inode(struct inode *inode)
50f8c370
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241{
242}
243
b85f4b87 244static inline void vfs_dq_sync(struct super_block *sb)
50f8c370
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245{
246}
247
b85f4b87 248static inline int vfs_dq_off(struct super_block *sb, int remount)
50f8c370
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249{
250 return 0;
251}
252
b85f4b87 253static inline int vfs_dq_quota_on_remount(struct super_block *sb)
50f8c370
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254{
255 return 0;
256}
257
b85f4b87 258static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
50f8c370
AM
259{
260 return 0;
261}
262
b85f4b87 263static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
264{
265 inode_add_bytes(inode, nr);
266 return 0;
267}
268
b85f4b87 269static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4 270{
b85f4b87 271 vfs_dq_prealloc_space_nodirty(inode, nr);
1da177e4
LT
272 mark_inode_dirty(inode);
273 return 0;
274}
275
b85f4b87 276static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
277{
278 inode_add_bytes(inode, nr);
279 return 0;
280}
281
b85f4b87 282static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4 283{
b85f4b87 284 vfs_dq_alloc_space_nodirty(inode, nr);
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LT
285 mark_inode_dirty(inode);
286 return 0;
287}
288
b85f4b87 289static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4
LT
290{
291 inode_sub_bytes(inode, nr);
292}
293
b85f4b87 294static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4 295{
b85f4b87 296 vfs_dq_free_space_nodirty(inode, nr);
1da177e4
LT
297 mark_inode_dirty(inode);
298}
299
300#endif /* CONFIG_QUOTA */
301
b85f4b87 302static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 303{
b85f4b87 304 return vfs_dq_prealloc_space_nodirty(inode,
03f6e92b
JK
305 nr << inode->i_sb->s_blocksize_bits);
306}
307
b85f4b87 308static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
03f6e92b 309{
b85f4b87 310 return vfs_dq_prealloc_space(inode,
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311 nr << inode->i_sb->s_blocksize_bits);
312}
313
b85f4b87 314static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 315{
b85f4b87 316 return vfs_dq_alloc_space_nodirty(inode,
03f6e92b
JK
317 nr << inode->i_sb->s_blocksize_bits);
318}
319
b85f4b87 320static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
03f6e92b 321{
b85f4b87 322 return vfs_dq_alloc_space(inode,
03f6e92b
JK
323 nr << inode->i_sb->s_blocksize_bits);
324}
325
b85f4b87 326static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b 327{
b85f4b87 328 vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b
JK
329}
330
b85f4b87 331static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
03f6e92b 332{
b85f4b87 333 vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b 334}
1da177e4 335
b85f4b87
JK
336/*
337 * Define uppercase equivalents for compatibility with old function names
338 * Can go away when we think all users have been converted (15/04/2008)
339 */
340#define DQUOT_INIT(inode) vfs_dq_init(inode)
341#define DQUOT_DROP(inode) vfs_dq_drop(inode)
342#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
343 vfs_dq_prealloc_space_nodirty(inode, nr)
344#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
345#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
346 vfs_dq_alloc_space_nodirty(inode, nr)
347#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
348#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
349 vfs_dq_prealloc_block_nodirty(inode, nr)
350#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
351#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
352 vfs_dq_alloc_block_nodirty(inode, nr)
353#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
354#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
355#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
356 vfs_dq_free_space_nodirty(inode, nr)
357#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
358#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
359 vfs_dq_free_block_nodirty(inode, nr)
360#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
361#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
362#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
363#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
364#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
365#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
366
1da177e4 367#endif /* _LINUX_QUOTAOPS_ */