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LU-2658 llite: too many arguments in generic_file_llseek_size
[fs/lustre-release.git] / lustre / include / linux / lustre_compat25.h
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #ifndef _LINUX_COMPAT25_H
38 #define _LINUX_COMPAT25_H
39
40 #include <linux/fs_struct.h>
41 #include <linux/namei.h>
42 #include <libcfs/linux/portals_compat25.h>
43
44 #include <linux/lustre_patchless_compat.h>
45
46 #ifdef HAVE_FS_STRUCT_RWLOCK
47 # define LOCK_FS_STRUCT(fs)     write_lock(&(fs)->lock)
48 # define UNLOCK_FS_STRUCT(fs)   write_unlock(&(fs)->lock)
49 #else
50 # define LOCK_FS_STRUCT(fs)     spin_lock(&(fs)->lock)
51 # define UNLOCK_FS_STRUCT(fs)   spin_unlock(&(fs)->lock)
52 #endif
53
54 #ifdef HAVE_FS_STRUCT_USE_PATH
55 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
56                                  struct dentry *dentry)
57 {
58         struct path path;
59         struct path old_pwd;
60
61         path.mnt = mnt;
62         path.dentry = dentry;
63         LOCK_FS_STRUCT(fs);
64         old_pwd = fs->pwd;
65         path_get(&path);
66         fs->pwd = path;
67         UNLOCK_FS_STRUCT(fs);
68
69         if (old_pwd.dentry)
70                 path_put(&old_pwd);
71 }
72
73 #else
74
75 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
76                 struct dentry *dentry)
77 {
78         struct dentry *old_pwd;
79         struct vfsmount *old_pwdmnt;
80
81         LOCK_FS_STRUCT(fs);
82         old_pwd = fs->pwd;
83         old_pwdmnt = fs->pwdmnt;
84         fs->pwdmnt = mntget(mnt);
85         fs->pwd = dget(dentry);
86         UNLOCK_FS_STRUCT(fs);
87
88         if (old_pwd) {
89                 dput(old_pwd);
90                 mntput(old_pwdmnt);
91         }
92 }
93 #endif
94
95 /*
96  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
97  * ATTR_* attributes (see bug 13828)
98  */
99 #define ATTR_BLOCKS    (1 << 27)
100
101 #define current_ngroups current_cred()->group_info->ngroups
102 #define current_groups current_cred()->group_info->small_block
103
104 /*
105  * OBD need working random driver, thus all our
106  * initialization routines must be called after device
107  * driver initialization
108  */
109 #ifndef MODULE
110 #undef module_init
111 #define module_init(a)     late_initcall(a)
112 #endif
113
114 #ifndef HAVE_TRYLOCK_PAGE
115 #define trylock_page(page)              (!TestSetPageLocked(page))
116 #endif
117
118 #define LTIME_S(time)                   (time.tv_sec)
119
120 #ifdef HAVE_EXPORT_INODE_PERMISSION
121 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
122 #else
123 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
124 #endif
125
126 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
127 # define ll_generic_permission(inode, mask, flags, check_acl) \
128          generic_permission(inode, mask)
129 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
130 # define ll_generic_permission(inode, mask, flags, check_acl) \
131          generic_permission(inode, mask, flags, check_acl)
132 #else
133 # define ll_generic_permission(inode, mask, flags, check_acl) \
134          generic_permission(inode, mask, check_acl)
135 #endif
136
137 #ifdef HAVE_BLKDEV_PUT_2ARGS
138 #define ll_blkdev_put(a, b) blkdev_put(a, b)
139 #else
140 #define ll_blkdev_put(a, b) blkdev_put(a)
141 #endif
142
143 static inline struct file *ll_dentry_open(struct dentry *dentry,
144                                           struct vfsmount *mnt, int flags,
145                                           const struct cred *cred)
146 {
147 #ifdef HAVE_DENTRY_OPEN_USE_PATH
148         struct path path = { .mnt = mnt, .dentry = dentry };
149         return dentry_open(&path, flags, cred);
150 #elif defined HAVE_DENTRY_OPEN_4ARGS
151         return dentry_open(dentry, mnt, flags, cred);
152 #else
153         return dentry_open(dentry, mnt, flags);
154 #endif
155 }
156
157 #ifdef HAVE_SECURITY_PLUG
158 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
159                 vfs_symlink(dir, dentry, mnt, path, mode)
160 #else
161 #ifdef HAVE_4ARGS_VFS_SYMLINK
162 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
163                 vfs_symlink(dir, dentry, path, mode)
164 #else
165 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
166                        vfs_symlink(dir, dentry, path)
167 #endif
168
169 #endif
170
171 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_5ARGS)
172 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
173                 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
174 #else
175 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
176                 generic_file_llseek_size(file, offset, origin, maxbytes);
177 #endif
178
179 #ifdef HAVE_INODE_DIO_WAIT
180 /* inode_dio_wait(i) use as-is for write lock */
181 # define inode_dio_write_done(i)        do {} while (0) /* for write unlock */
182 # define inode_dio_read(i)              atomic_inc(&(i)->i_dio_count)
183 /* inode_dio_done(i) use as-is for read unlock */
184 #else
185 # define inode_dio_wait(i)              down_write(&(i)->i_alloc_sem)
186 # define inode_dio_write_done(i)        up_write(&(i)->i_alloc_sem)
187 # define inode_dio_read(i)              down_read(&(i)->i_alloc_sem)
188 # define inode_dio_done(i)              up_read(&(i)->i_alloc_sem)
189 #endif
190
191 #ifdef HAVE_RW_TREE_LOCK
192 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
193 #define TREE_READ_UNLOCK_IRQ(mapping)   read_unlock_irq(&(mapping)->tree_lock)
194 #else
195 #define TREE_READ_LOCK_IRQ(mapping)     spin_lock_irq(&(mapping)->tree_lock)
196 #define TREE_READ_UNLOCK_IRQ(mapping)   spin_unlock_irq(&(mapping)->tree_lock)
197 #endif
198
199 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
200 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
201 #else
202 static inline
203 int ll_unregister_blkdev(unsigned int dev, const char *name)
204 {
205         unregister_blkdev(dev, name);
206         return 0;
207 }
208 #endif
209
210 #ifdef HAVE_INVALIDATE_BDEV_2ARG
211 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
212 #else
213 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
214 #endif
215
216 #ifndef FS_HAS_FIEMAP
217 #define FS_HAS_FIEMAP                   (0)
218 #endif
219
220 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
221 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
222 #endif
223
224 #ifndef HAVE_D_OBTAIN_ALIAS
225 /* The old d_alloc_anon() didn't free the inode reference on error
226  * like d_obtain_alias().  Hide that difference/inconvenience here. */
227 static inline struct dentry *d_obtain_alias(struct inode *inode)
228 {
229         struct dentry *anon = d_alloc_anon(inode);
230
231         if (anon == NULL) {
232                 iput(inode);
233                 anon = ERR_PTR(-ENOMEM);
234         }
235
236         return anon;
237 }
238 #endif
239
240 /* add a lustre compatible layer for crypto API */
241 #include <linux/crypto.h>
242 #ifdef HAVE_ASYNC_BLOCK_CIPHER
243 #define ll_crypto_hash          crypto_hash
244 #define ll_crypto_cipher        crypto_blkcipher
245 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
246 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
247 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
248 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
249 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
250 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
251                 crypto_blkcipher_setkey(tfm, key, keylen)
252 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
253                 crypto_blkcipher_set_iv(tfm, src, len)
254 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
255                 crypto_blkcipher_get_iv(tfm, dst, len)
256 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
257                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
258 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
259                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
260 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
261                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
262 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
263                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
264
265 static inline
266 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
267                                                    u32 type, u32 mask)
268 {
269         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
270
271         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
272 }
273
274 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
275                                  u8 *key, unsigned int *keylen,
276                                  struct scatterlist *sg,
277                                  unsigned int size, u8 *result)
278 {
279         struct hash_desc desc;
280         int              rv;
281         desc.tfm   = tfm;
282         desc.flags = 0;
283         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
284         if (rv) {
285                 CERROR("failed to hash setkey: %d\n", rv);
286                 return rv;
287         }
288         return crypto_hash_digest(&desc, sg, size, result);
289 }
290 static inline
291 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
292 {
293         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
294 }
295 static inline
296 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
297 {
298         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
299 }
300
301 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
302 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
303 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
304 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
305 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
306 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
307 #else /* HAVE_ASYNC_BLOCK_CIPHER */
308 #include <linux/scatterlist.h>
309 #define ll_crypto_hash          crypto_tfm
310 #define ll_crypto_cipher        crypto_tfm
311 #ifndef HAVE_STRUCT_HASH_DESC
312 struct hash_desc {
313         struct ll_crypto_hash *tfm;
314         u32                    flags;
315 };
316 #endif
317 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
318 struct blkcipher_desc {
319         struct ll_crypto_cipher *tfm;
320         void                    *info;
321         u32                      flags;
322 };
323 #endif
324 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
325         crypto_cipher_setkey(tfm, key, keylen)
326 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
327         crypto_cipher_set_iv(tfm, src, len)
328 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
329         crypto_cipher_get_iv(tfm, dst, len)
330 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
331         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
332 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
333         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
334 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
335         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
336 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
337         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
338
339 static inline
340 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
341                                                    u32 type, u32 mask)
342 {
343         struct ll_crypto_cipher *rtn;
344         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
345         const char              *pan = algname;
346         u32                      flag = 0;
347
348         if (strncmp("cbc(", algname, 4) == 0)
349                 flag |= CRYPTO_TFM_MODE_CBC;
350         else if (strncmp("ecb(", algname, 4) == 0)
351                 flag |= CRYPTO_TFM_MODE_ECB;
352         if (flag) {
353                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
354                 if (vp) {
355                         memcpy(buf, algname + 4, vp - algname - 4);
356                         buf[vp - algname - 4] = '\0';
357                         pan = buf;
358                 } else {
359                         flag = 0;
360                 }
361         }
362         rtn = crypto_alloc_tfm(pan, flag);
363         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
364 }
365
366 static inline
367 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
368 {
369         char        buf[CRYPTO_MAX_ALG_NAME + 1];
370         const char *pan = alg;
371
372         if (strncmp("hmac(", alg, 5) == 0) {
373                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
374                 if (vp) {
375                         memcpy(buf, alg+ 5, vp - alg- 5);
376                         buf[vp - alg - 5] = 0x00;
377                         pan = buf;
378                 }
379         }
380         return crypto_alloc_tfm(pan, 0);
381 }
382 static inline int ll_crypto_hash_init(struct hash_desc *desc)
383 {
384        crypto_digest_init(desc->tfm); return 0;
385 }
386 static inline int ll_crypto_hash_update(struct hash_desc *desc,
387                                         struct scatterlist *sg,
388                                         unsigned int nbytes)
389 {
390         struct scatterlist *sl = sg;
391         unsigned int        count;
392                 /*
393                  * This way is very weakness. We must ensure that
394                  * the sum of sg[0..i]->length isn't greater than nbytes.
395                  * In the upstream kernel the crypto_hash_update() also
396                  * via the nbytes computed the count of sg[...].
397                  * The old style is more safely. but it gone.
398                  */
399         for (count = 0; nbytes > 0; count ++, sl ++) {
400                 nbytes -= sl->length;
401         }
402         crypto_digest_update(desc->tfm, sg, count); return 0;
403 }
404 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
405 {
406         crypto_digest_final(desc->tfm, out); return 0;
407 }
408 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
409                                  u8 *key, unsigned int *keylen,
410                                  struct scatterlist *sg,
411                                  unsigned int nbytes,
412                                  u8 *out)
413 {
414         struct scatterlist *sl = sg;
415         int                 count;
416         for (count = 0; nbytes > 0; count ++, sl ++) {
417                 nbytes -= sl->length;
418         }
419         crypto_hmac(tfm, key, keylen, sg, count, out);
420         return 0;
421 }
422
423 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
424 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
425 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
426 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
427 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
428 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
429 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
430 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
431 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
432 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
433
434 #ifdef HAVE_SECURITY_PLUG
435 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
436 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
437 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
438 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
439 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
440                 vfs_mknod(dir,entry,mnt,mode,dev)
441 #define ll_security_inode_unlink(dir,entry,mnt)         \
442                 security_inode_unlink(dir,entry,mnt)
443 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
444                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
445 #else
446 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
447 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
448 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
449 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
450 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
451 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
452 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
453                 vfs_rename(old,old_dir,new,new_dir)
454 #endif /* HAVE_SECURITY_PLUG */
455
456 #ifdef for_each_possible_cpu
457 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
458 #elif defined(for_each_cpu)
459 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
460 #endif
461
462 #ifdef HAVE_BIO_ENDIO_2ARG
463 #define cfs_bio_io_error(a,b)   bio_io_error((a))
464 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
465 #else
466 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
467 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
468 #endif
469
470 #ifdef HAVE_FS_STRUCT_USE_PATH
471 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
472 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
473 #define cfs_path_put(nd)     path_put(&(nd)->path)
474 #else
475 #define cfs_fs_pwd(fs)       ((fs)->pwd)
476 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
477 #define cfs_path_put(nd)     path_release(nd)
478 #endif
479
480 #ifndef HAVE_SIMPLE_SETATTR
481 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
482 #endif
483
484 #ifndef SLAB_DESTROY_BY_RCU
485 #define SLAB_DESTROY_BY_RCU 0
486 #endif
487
488 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
489 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
490 #endif
491
492 #ifndef HAVE_SB_ANY_QUOTA_LOADED
493 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
494 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
495 # else
496 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
497 # endif
498 #endif
499
500 static inline int
501 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
502 {
503         int rc;
504
505         if (sb->s_qcop->quota_on) {
506 #ifdef HAVE_QUOTA_ON_USE_PATH
507                 struct path path;
508
509                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
510                 if (!rc)
511                         return rc;
512 #endif
513                 rc = sb->s_qcop->quota_on(sb, off, ver
514 #ifdef HAVE_QUOTA_ON_USE_PATH
515                                             , &path
516 #else
517                                             , name
518 #endif
519 #ifdef HAVE_QUOTA_ON_5ARGS
520                                             , remount
521 #endif
522                                            );
523 #ifdef HAVE_QUOTA_ON_USE_PATH
524                 path_put(&path);
525 #endif
526                 return rc;
527         }
528         else
529                 return -ENOSYS;
530 }
531
532 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
533 {
534         if (sb->s_qcop->quota_off) {
535                 return sb->s_qcop->quota_off(sb, off
536 #ifdef HAVE_QUOTA_OFF_3ARGS
537                                              , remount
538 #endif
539                                             );
540         }
541         else
542                 return -ENOSYS;
543 }
544
545 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
546 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
547 #endif
548
549 #ifndef HAVE_DQUOT_SUSPEND
550 #ifndef HAVE_VFS_DQ_OFF
551 # define ll_vfs_dq_init             DQUOT_INIT
552 # define ll_vfs_dq_drop             DQUOT_DROP
553 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
554 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
555 #else
556 # define ll_vfs_dq_init             vfs_dq_init
557 # define ll_vfs_dq_drop             vfs_dq_drop
558 # define ll_vfs_dq_transfer         vfs_dq_transfer
559 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
560 #endif
561 #else
562 # define ll_vfs_dq_init             dquot_initialize
563 # define ll_vfs_dq_drop             dquot_drop
564 # define ll_vfs_dq_transfer         dquot_transfer
565 # define ll_vfs_dq_off(sb, remount) dquot_suspend(sb, -1)
566 #endif
567
568 #ifndef HAVE_BDI_INIT
569 #define bdi_init(bdi)    0
570 #define bdi_destroy(bdi) do { } while (0)
571 #endif
572
573 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
574 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
575 #endif
576
577 #ifndef HAVE_BLKDEV_GET_BY_DEV
578 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
579 #endif
580
581 #ifndef HAVE_REQUEST_QUEUE_LIMITS
582 #define queue_max_sectors(rq)             ((rq)->max_sectors)
583 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
584 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
585 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
586 #endif
587
588 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
589 #define blk_queue_max_segments(rq, seg)                      \
590         do { blk_queue_max_phys_segments(rq, seg);           \
591              blk_queue_max_hw_segments(rq, seg); } while (0)
592 #else
593 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
594 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
595 #endif
596
597 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
598 #define ll_kmap_atomic(a, b)    kmap_atomic(a)
599 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a)
600 #else
601 #define ll_kmap_atomic(a, b)    kmap_atomic(a, b)
602 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a, b)
603 #endif
604
605 #ifndef HAVE_CLEAR_INODE
606 #define clear_inode(i)          end_writeback(i)
607 #endif
608
609 #ifdef HAVE_DENTRY_D_ALIAS_HLIST
610 #define ll_d_hlist_node hlist_node
611 #define ll_d_hlist_empty(list) hlist_empty(list)
612 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
613 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
614 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
615         hlist_for_each_entry(dentry, p, i_dentry, alias)
616 #else
617 #define ll_d_hlist_node list_head
618 #define ll_d_hlist_empty(list) list_empty(list)
619 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
620 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
621 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
622         p = NULL; list_for_each_entry(dentry, i_dentry, alias)
623 #endif
624
625
626 #ifndef HAVE_BI_HW_SEGMENTS
627 #define bio_hw_segments(q, bio) 0
628 #endif
629
630 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
631 #define pagevec_lru_add_file pagevec_lru_add
632 #endif
633
634 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
635 #define ll_pagevec_init(pv, cold)       do {} while (0)
636 #define ll_pagevec_add(pv, pg)          (0)
637 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
638 #else
639 #define add_to_page_cache_lru(pg, mapping, off, gfp) \
640         add_to_page_cache(pg, mapping, off, gfp)
641 #define ll_pagevec_init(pv, cold)       pagevec_init(pv, cold);
642 #define ll_pagevec_add(pv, pg)                                  \
643 ({                                                              \
644         int __ret;                                              \
645                                                                 \
646         page_cache_get(pg);                                     \
647         __ret = pagevec_add(pv, pg);                            \
648 })
649 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
650 #endif
651
652 #if !defined(HAVE_CPUMASK_OF_NODE) && defined(HAVE_NODE_TO_CPUMASK)
653 # ifdef HAVE_OFED_CPUMASK_OF_NODE
654 # undef cpumask_of_node
655 # define HAVE_CPUMASK_OF_NODE
656 # endif
657 #define cpumask_of_node(i)      (&node_to_cpumask(i))
658 #endif
659
660 #ifndef QUOTA_OK
661 # define QUOTA_OK 0
662 #endif
663 #ifndef NO_QUOTA
664 # define NO_QUOTA (-EDQUOT)
665 #endif
666
667 #ifndef SEEK_DATA
668 #define SEEK_DATA      3       /* seek to the next data */
669 #endif
670 #ifndef SEEK_HOLE
671 #define SEEK_HOLE      4       /* seek to the next hole */
672 #endif
673
674 #ifndef FMODE_UNSIGNED_OFFSET
675 #define FMODE_UNSIGNED_OFFSET   ((__force fmode_t)0x2000)
676 #endif
677
678 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
679 # define ext2_set_bit             __test_and_set_bit_le
680 # define ext2_clear_bit           __test_and_clear_bit_le
681 # define ext2_test_bit            test_bit_le
682 # define ext2_find_first_zero_bit find_first_zero_bit_le
683 # define ext2_find_next_zero_bit  find_next_zero_bit_le
684 #endif
685
686 #ifdef ATTR_TIMES_SET
687 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
688 #else
689 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
690 #endif
691
692 #ifndef HAVE_SELINUX_IS_ENABLED
693 static inline bool selinux_is_enabled(void)
694 {
695         return 0;
696 }
697 #endif
698
699 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
700 # define lm_compare_owner       fl_compare_owner
701 #endif
702
703 /*
704  * After 3.1, kernel's nameidata.intent.open.flags is different
705  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
706  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
707  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
708  * */
709 #include <linux/version.h>
710 static inline int ll_namei_to_lookup_intent_flag(int flag)
711 {
712 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
713         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
714 #endif
715         return flag;
716 }
717
718 #ifdef HAVE_VOID_MAKE_REQUEST_FN
719 # define ll_mrf_ret void
720 # define LL_MRF_RETURN(rc)
721 #else
722 # define ll_mrf_ret int
723 # define LL_MRF_RETURN(rc) RETURN(rc)
724 #endif
725
726 #include <linux/fs.h>
727 #ifndef HAVE_PROTECT_I_NLINK
728 static inline void set_nlink(struct inode *inode, unsigned int nlink)
729 {
730         inode->i_nlink = nlink;
731 }
732 #endif
733
734 #ifdef HAVE_INODEOPS_USE_UMODE_T
735 # define ll_umode_t     umode_t
736 #else
737 # define ll_umode_t     int
738 #endif
739
740 #include <linux/dcache.h>
741 #ifndef HAVE_D_MAKE_ROOT
742 static inline struct dentry *d_make_root(struct inode *root)
743 {
744         struct dentry *res = d_alloc_root(root);
745
746         if (res == NULL && root)
747                 iput(root);
748
749         return res;
750 }
751 #endif
752
753 #endif /* _COMPAT25_H */