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LU-335 ldiskfs: SuSE 11 SP1 support for Lustre 2.X
[fs/lustre-release.git] / lustre / include / linux / lustre_compat25.h
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30  * Use is subject to license terms.
31  */
32 /*
33  * Copyright (c) 2011 Whamcloud, Inc.
34  */
35 /*
36  * This file is part of Lustre, http://www.lustre.org/
37  * Lustre is a trademark of Sun Microsystems, Inc.
38  */
39
40 #ifndef _LINUX_COMPAT25_H
41 #define _LINUX_COMPAT25_H
42
43 #ifdef __KERNEL__
44
45 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
46 #error sorry, lustre requires at least linux kernel 2.6.9 or later
47 #endif
48
49 #include <linux/fs_struct.h>
50 #include <libcfs/linux/portals_compat25.h>
51
52 #include <linux/lustre_patchless_compat.h>
53
54 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
55  * definition allows to compile lustre client on more OS platforms. */
56 #ifndef SEEK_SET
57  #define SEEK_SET 0
58  #define SEEK_CUR 1
59  #define SEEK_END 2
60 #endif
61
62 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
63 struct ll_iattr {
64         struct iattr    iattr;
65         unsigned int    ia_attr_flags;
66 };
67 #else
68 #define ll_iattr iattr
69 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
70
71 #ifdef HAVE_FS_STRUCT_USE_PATH
72 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
73                                  struct dentry *dentry)
74 {
75         struct path path;
76         struct path old_pwd;
77
78         path.mnt = mnt;
79         path.dentry = dentry;
80         write_lock(&fs->lock);
81         old_pwd = fs->pwd;
82         path_get(&path);
83         fs->pwd = path;
84         write_unlock(&fs->lock);
85
86         if (old_pwd.dentry)
87                 path_put(&old_pwd);
88 }
89
90 #else
91
92 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
93                 struct dentry *dentry)
94 {
95         struct dentry *old_pwd;
96         struct vfsmount *old_pwdmnt;
97
98         cfs_write_lock(&fs->lock);
99         old_pwd = fs->pwd;
100         old_pwdmnt = fs->pwdmnt;
101         fs->pwdmnt = mntget(mnt);
102         fs->pwd = dget(dentry);
103         cfs_write_unlock(&fs->lock);
104
105         if (old_pwd) {
106                 dput(old_pwd);
107                 mntput(old_pwdmnt);
108         }
109 }
110 #endif
111
112 /*
113  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
114  * ATTR_* attributes (see bug 13828)
115  */
116 #define ATTR_BLOCKS    (1 << 27)
117
118 #if HAVE_INODE_I_MUTEX
119 #define UNLOCK_INODE_MUTEX(inode) \
120 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
121 #define LOCK_INODE_MUTEX(inode) \
122 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
123 #define LOCK_INODE_MUTEX_PARENT(inode) \
124 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
125 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
126 #else
127 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
128 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
129 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
130 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
131 #endif /* HAVE_INODE_I_MUTEX */
132
133 #ifdef HAVE_SEQ_LOCK
134 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
135 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
136 #else
137 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
138 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
139 #endif
140
141 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
142 #define d_child d_u.d_child
143 #define d_rcu d_u.d_rcu
144 #endif
145
146 #ifdef HAVE_DQUOTOFF_MUTEX
147 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
148 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
149 #else
150 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
151 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
152 #endif /* HAVE_DQUOTOFF_MUTEX */
153
154 #define current_ngroups current_cred()->group_info->ngroups
155 #define current_groups current_cred()->group_info->small_block
156
157 #ifndef page_private
158 #define page_private(page) ((page)->private)
159 #define set_page_private(page, v) ((page)->private = (v))
160 #endif
161
162 #ifndef HAVE_GFP_T
163 #define gfp_t int
164 #endif
165
166 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
167 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
168
169 #define ll_kernel_locked()      kernel_locked()
170
171 /*
172  * OBD need working random driver, thus all our
173  * initialization routines must be called after device
174  * driver initialization
175  */
176 #ifndef MODULE
177 #undef module_init
178 #define module_init(a)     late_initcall(a)
179 #endif
180
181 /* XXX our code should be using the 2.6 calls, not the other way around */
182 #ifdef HAVE_TRYLOCK_PAGE
183 #define TestSetPageLocked(page)         (!trylock_page(page))
184 #endif
185
186 #define Page_Uptodate(page)             PageUptodate(page)
187 #define ll_redirty_page(page)           set_page_dirty(page)
188
189 #define KDEVT_INIT(val)                 (val)
190
191 #define LTIME_S(time)                   (time.tv_sec)
192 #define ll_path_lookup                  path_lookup
193
194 #ifdef HAVE_EXPORT_INODE_PERMISSION
195 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
196 #else
197 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
198 #endif
199
200 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
201 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
202 #define ll_call_writepage(inode, page)  \
203                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
204 #define ll_invalidate_inode_pages(inode) \
205                                 invalidate_inode_pages((inode)->i_mapping)
206
207 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
208 #define ll_dev_t                        dev_t
209 #define kdev_t                          dev_t
210 #define to_kdev_t(dev)                  (dev)
211 #define kdev_t_to_nr(dev)               (dev)
212 #define val_to_kdev(dev)                (dev)
213
214 #ifdef HAVE_BLKDEV_PUT_2ARGS
215 #define ll_blkdev_put(a, b) blkdev_put(a, b)
216 #else
217 #define ll_blkdev_put(a, b) blkdev_put(a)
218 #endif
219
220 #ifdef HAVE_DENTRY_OPEN_4ARGS
221 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
222 #else
223 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
224 #endif
225
226 #include <linux/writeback.h>
227
228 static inline int cfs_cleanup_group_info(void)
229 {
230         struct group_info *ginfo;
231
232         ginfo = groups_alloc(0);
233         if (!ginfo)
234                 return -ENOMEM;
235
236         set_current_groups(ginfo);
237         put_group_info(ginfo);
238
239         return 0;
240 }
241
242 #define __set_page_ll_data(page, llap) \
243         do {       \
244                 page_cache_get(page); \
245                 SetPagePrivate(page); \
246                 set_page_private(page, (unsigned long)llap); \
247         } while (0)
248 #define __clear_page_ll_data(page) \
249         do {       \
250                 ClearPagePrivate(page); \
251                 set_page_private(page, 0); \
252                 page_cache_release(page); \
253         } while(0)
254
255 #define kiobuf bio
256
257 #include <linux/proc_fs.h>
258
259 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
260 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
261 extern void __d_rehash(struct dentry *dentry, int lock);
262 #endif
263
264 #ifdef HAVE_CAN_SLEEP_ARG
265 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
266         flock_lock_file_wait(file, lock, can_sleep)
267 #else
268 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
269         flock_lock_file_wait(file, lock)
270 #endif
271
272 #define CheckWriteback(page, cmd) \
273         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
274          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
275
276 #ifdef HAVE_PAGE_LIST
277 static inline int mapping_has_pages(struct address_space *mapping)
278 {
279         int rc = 1;
280
281         ll_pgcache_lock(mapping);
282         if (cfs_list_empty(&mapping->dirty_pages) &&
283             cfs_list_empty(&mapping->clean_pages) &&
284             cfs_list_empty(&mapping->locked_pages)) {
285                 rc = 0;
286         }
287         ll_pgcache_unlock(mapping);
288
289         return rc;
290 }
291 #else
292 static inline int mapping_has_pages(struct address_space *mapping)
293 {
294         return mapping->nrpages > 0;
295 }
296 #endif
297
298 #ifdef HAVE_KIOBUF_KIO_BLOCKS
299 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
300 #else
301 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
302 #endif
303
304 #ifdef HAVE_SECURITY_PLUG
305 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
306                 vfs_symlink(dir, dentry, mnt, path, mode)
307 #else
308 #ifdef HAVE_4ARGS_VFS_SYMLINK
309 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
310                 vfs_symlink(dir, dentry, path, mode)
311 #else
312 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
313                        vfs_symlink(dir, dentry, path)
314 #endif
315
316 #define ll_set_dflags(dentry, flags) do { \
317                 cfs_spin_lock(&dentry->d_lock); \
318                 dentry->d_flags |= flags; \
319                 cfs_spin_unlock(&dentry->d_lock); \
320         } while(0)
321 #endif
322
323 #ifndef container_of
324 #define container_of(ptr, type, member) ({                      \
325                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
326                 (type *)( (char *)__mptr - offsetof(type,member) );})
327 #endif
328
329 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
330 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
331 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
332
333 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
334 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
335 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
336
337 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
338 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
339 #endif
340
341 #include <linux/mpage.h>        /* for generic_writepages */
342 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
343 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
344 static inline int filemap_fdatawrite_range(struct address_space *mapping,
345                                            loff_t start, loff_t end)
346 {
347         int rc;
348         struct writeback_control wbc = {
349                 .sync_mode = WB_SYNC_ALL,
350                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
351         };
352
353 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
354         wbc.range_start = start;
355         wbc.range_end = end;
356 #else
357         wbc.start = start;
358         wbc.end = end;
359 #endif
360
361 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
362         if (!mapping_cap_writeback_dirty(mapping))
363                 rc = 0;
364 #else
365         if (mapping->backing_dev_info->memory_backed)
366                 rc = 0;
367 #endif
368         /* do_writepages() */
369         else if (mapping->a_ops->writepages)
370                 rc = mapping->a_ops->writepages(mapping, &wbc);
371         else
372                 rc = generic_writepages(mapping, &wbc);
373         return rc;
374 }
375 #else
376 int filemap_fdatawrite_range(struct address_space *mapping,
377                              loff_t start, loff_t end);
378 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
379
380 #ifdef HAVE_VFS_KERN_MOUNT
381 static inline struct vfsmount *
382 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
383 {
384         struct file_system_type *type = get_fs_type(fstype);
385         struct vfsmount *mnt;
386         if (!type)
387                 return ERR_PTR(-ENODEV);
388         mnt = vfs_kern_mount(type, flags, name, data);
389         cfs_module_put(type->owner);
390         return mnt;
391 }
392 #else
393 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
394 #endif
395
396 #ifdef HAVE_STATFS_DENTRY_PARAM
397 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
398 #else
399 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
400 #endif
401
402 #ifndef HAVE_SB_TIME_GRAN
403 #ifndef HAVE_S_TIME_GRAN
404 #error Need s_time_gran patch!
405 #endif
406 static inline u32 get_sb_time_gran(struct super_block *sb)
407 {
408         return sb->s_time_gran;
409 }
410 #endif
411
412 #ifdef HAVE_RW_TREE_LOCK
413 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
414 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
415 #else
416 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
417 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
418 #endif
419
420 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
421 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
422 #else
423 static inline
424 int ll_unregister_blkdev(unsigned int dev, const char *name)
425 {
426         unregister_blkdev(dev, name);
427         return 0;
428 }
429 #endif
430
431 #ifdef HAVE_INVALIDATE_BDEV_2ARG
432 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
433 #else
434 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
435 #endif
436
437 #ifdef HAVE_INODE_BLKSIZE
438 #define ll_inode_blksize(a)     (a)->i_blksize
439 #else
440 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
441 #endif
442
443 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
444 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
445 #else
446 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
447 #endif
448
449 #ifndef HAVE_D_OBTAIN_ALIAS
450 /* The old d_alloc_anon() didn't free the inode reference on error
451  * like d_obtain_alias().  Hide that difference/inconvenience here. */
452 static inline struct dentry *d_obtain_alias(struct inode *inode)
453 {
454         struct dentry *anon = d_alloc_anon(inode);
455
456         if (anon == NULL) {
457                 iput(inode);
458                 anon = ERR_PTR(-ENOMEM);
459         }
460
461         return anon;
462 }
463 #endif
464
465 /* add a lustre compatible layer for crypto API */
466 #include <linux/crypto.h>
467 #ifdef HAVE_ASYNC_BLOCK_CIPHER
468 #define ll_crypto_hash          crypto_hash
469 #define ll_crypto_cipher        crypto_blkcipher
470 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
471 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
472 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
473 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
474 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
475 #define ll_crypto_alloc_blkcipher(name, type, mask) \
476                 crypto_alloc_blkcipher(name ,type, mask)
477 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
478                 crypto_blkcipher_setkey(tfm, key, keylen)
479 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
480                 crypto_blkcipher_set_iv(tfm, src, len)
481 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
482                 crypto_blkcipher_get_iv(tfm, dst, len)
483 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
484                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
485 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
486                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
487 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
488                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
489 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
490                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
491
492 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
493                                  u8 *key, unsigned int *keylen,
494                                  struct scatterlist *sg,
495                                  unsigned int size, u8 *result)
496 {
497         struct hash_desc desc;
498         int              rv;
499         desc.tfm   = tfm;
500         desc.flags = 0;
501         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
502         if (rv) {
503                 CERROR("failed to hash setkey: %d\n", rv);
504                 return rv;
505         }
506         return crypto_hash_digest(&desc, sg, size, result);
507 }
508 static inline
509 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
510 {
511         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
512 }
513 static inline
514 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
515 {
516         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
517 }
518
519 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
520 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
521 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
522 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
523 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
524 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
525 #else /* HAVE_ASYNC_BLOCK_CIPHER */
526 #include <linux/scatterlist.h>
527 #define ll_crypto_hash          crypto_tfm
528 #define ll_crypto_cipher        crypto_tfm
529 #ifndef HAVE_STRUCT_HASH_DESC
530 struct hash_desc {
531         struct ll_crypto_hash *tfm;
532         u32                    flags;
533 };
534 #endif
535 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
536 struct blkcipher_desc {
537         struct ll_crypto_cipher *tfm;
538         void                    *info;
539         u32                      flags;
540 };
541 #endif
542 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
543         crypto_cipher_setkey(tfm, key, keylen)
544 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
545         crypto_cipher_set_iv(tfm, src, len)
546 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
547         crypto_cipher_get_iv(tfm, dst, len)
548 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
549         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
550 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
551         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
552 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
553         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
554 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
555         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
556
557 static inline
558 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
559                                                    u32 type, u32 mask)
560 {
561         char        buf[CRYPTO_MAX_ALG_NAME + 1];
562         const char *pan = algname;
563         u32         flag = 0;
564
565         if (strncmp("cbc(", algname, 4) == 0)
566                 flag |= CRYPTO_TFM_MODE_CBC;
567         else if (strncmp("ecb(", algname, 4) == 0)
568                 flag |= CRYPTO_TFM_MODE_ECB;
569         if (flag) {
570                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
571                 if (vp) {
572                         memcpy(buf, algname + 4, vp - algname - 4);
573                         buf[vp - algname - 4] = '\0';
574                         pan = buf;
575                 } else {
576                         flag = 0;
577                 }
578         }
579         return crypto_alloc_tfm(pan, flag);
580 }
581
582 static inline
583 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
584 {
585         char        buf[CRYPTO_MAX_ALG_NAME + 1];
586         const char *pan = alg;
587
588         if (strncmp("hmac(", alg, 5) == 0) {
589                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
590                 if (vp) {
591                         memcpy(buf, alg+ 5, vp - alg- 5);
592                         buf[vp - alg - 5] = 0x00;
593                         pan = buf;
594                 }
595         }
596         return crypto_alloc_tfm(pan, 0);
597 }
598 static inline int ll_crypto_hash_init(struct hash_desc *desc)
599 {
600        crypto_digest_init(desc->tfm); return 0;
601 }
602 static inline int ll_crypto_hash_update(struct hash_desc *desc,
603                                         struct scatterlist *sg,
604                                         unsigned int nbytes)
605 {
606         struct scatterlist *sl = sg;
607         unsigned int        count;
608                 /*
609                  * This way is very weakness. We must ensure that
610                  * the sum of sg[0..i]->length isn't greater than nbytes.
611                  * In the upstream kernel the crypto_hash_update() also
612                  * via the nbytes computed the count of sg[...].
613                  * The old style is more safely. but it gone.
614                  */
615         for (count = 0; nbytes > 0; count ++, sl ++) {
616                 nbytes -= sl->length;
617         }
618         crypto_digest_update(desc->tfm, sg, count); return 0;
619 }
620 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
621 {
622         crypto_digest_final(desc->tfm, out); return 0;
623 }
624 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
625                                  u8 *key, unsigned int *keylen,
626                                  struct scatterlist *sg,
627                                  unsigned int nbytes,
628                                  u8 *out)
629 {
630         struct scatterlist *sl = sg;
631         int                 count;
632         for (count = 0; nbytes > 0; count ++, sl ++) {
633                 nbytes -= sl->length;
634         }
635         crypto_hmac(tfm, key, keylen, sg, count, out);
636         return 0;
637 }
638
639 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
640 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
641 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
642 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
643 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
644 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
645 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
646 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
647 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
648 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
649
650 #ifndef HAVE_SYNCHRONIZE_RCU
651 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
652 #ifndef synchronize_rcu
653 #define synchronize_rcu() synchronize_kernel()
654 #endif
655 #endif
656
657 #ifdef HAVE_FILE_REMOVE_SUID
658 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
659 #else
660 # ifdef HAVE_SECURITY_PLUG
661 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
662 # else
663 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
664 # endif
665 #endif
666
667 #ifdef HAVE_SECURITY_PLUG
668 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
669 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
670 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
671 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
672 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
673                 vfs_mknod(dir,entry,mnt,mode,dev)
674 #define ll_security_inode_unlink(dir,entry,mnt)         \
675                 security_inode_unlink(dir,entry,mnt)
676 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
677                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
678 #else
679 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
680 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
681 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
682 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
683 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
684 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
685 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
686                 vfs_rename(old,old_dir,new,new_dir)
687 #endif /* HAVE_SECURITY_PLUG */
688
689 #ifdef for_each_possible_cpu
690 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
691 #elif defined(for_each_cpu)
692 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
693 #endif
694
695 #ifdef HAVE_BIO_ENDIO_2ARG
696 #define cfs_bio_io_error(a,b)   bio_io_error((a))
697 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
698 #else
699 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
700 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
701 #endif
702
703 #ifdef HAVE_FS_STRUCT_USE_PATH
704 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
705 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
706 #define cfs_path_put(nd)     path_put(&(nd)->path)
707 #else
708 #define cfs_fs_pwd(fs)       ((fs)->pwd)
709 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
710 #define cfs_path_put(nd)     path_release(nd)
711 #endif
712
713 #ifndef abs
714 static inline int abs(int x)
715 {
716         return (x < 0) ? -x : x;
717 }
718 #endif
719
720 #ifndef labs
721 static inline long labs(long x)
722 {
723         return (x < 0) ? -x : x;
724 }
725 #endif /* HAVE_REGISTER_SHRINKER */
726
727 #ifdef HAVE_INVALIDATE_INODE_PAGES
728 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
729 #endif
730
731 #ifdef HAVE_INODE_IPRIVATE
732 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
733 #else
734 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
735 #endif
736
737 #ifndef SLAB_DESTROY_BY_RCU
738 #define CFS_SLAB_DESTROY_BY_RCU 0
739 #else
740 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
741 #endif
742
743 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
744 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
745 #else
746 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
747 #endif
748
749 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
750 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
751 #else
752 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
753 #endif
754
755 static inline int
756 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
757 {
758         if (sb->s_qcop->quota_on) {
759                 return sb->s_qcop->quota_on(sb, off, ver, name
760 #ifdef HAVE_QUOTA_ON_5ARGS
761                                             , remount
762 #endif
763                                            );
764         }
765         else
766                 return -ENOSYS;
767 }
768
769 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
770 {
771         if (sb->s_qcop->quota_off) {
772                 return sb->s_qcop->quota_off(sb, off
773 #ifdef HAVE_QUOTA_OFF_3ARGS
774                                              , remount
775 #endif
776                                             );
777         }
778         else
779                 return -ENOSYS;
780 }
781
782 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
783 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
784 #endif
785
786 #ifndef HAVE_VFS_DQ_OFF
787 # define ll_vfs_dq_init             DQUOT_INIT
788 # define ll_vfs_dq_drop             DQUOT_DROP
789 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
790 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
791 #else
792 # define ll_vfs_dq_init             vfs_dq_init
793 # define ll_vfs_dq_drop             vfs_dq_drop
794 # define ll_vfs_dq_transfer         vfs_dq_transfer
795 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
796 #endif
797
798 #ifdef HAVE_BDI_INIT
799 #define ll_bdi_init(bdi)    bdi_init(bdi)
800 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
801 #else
802 #define ll_bdi_init(bdi)    0
803 #define ll_bdi_destroy(bdi) do { } while(0)
804 #endif
805
806 #ifdef HAVE_NEW_BACKING_DEV_INFO
807 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
808 #else
809 # define ll_bdi_wb_cnt(bdi) 1
810 #endif
811
812 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
813 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
814 #endif
815
816 #ifndef HAVE_BLKDEV_GET_BY_DEV
817 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
818 #endif
819
820 #ifndef HAVE_REQUEST_QUEUE_LIMITS
821 #define queue_max_sectors(rq)             ((rq)->max_sectors)
822 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
823 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
824 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
825 #endif
826
827 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
828 #define blk_queue_max_segments(rq, seg)                      \
829         do { blk_queue_max_phys_segments(rq, seg);           \
830              blk_queue_max_hw_segments(rq, seg); } while (0)
831 #else
832 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
833 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
834 #endif
835
836
837 #ifndef HAVE_BI_HW_SEGMENTS
838 #define bio_hw_segments(q, bio) 0
839 #endif
840
841 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
842 #define pagevec_lru_add_file pagevec_lru_add
843 #endif
844
845 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
846 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
847         add_to_page_cache_lru(pg, mapping, off, gfp)
848 #define ll_pagevec_init(pv, cold)       do {} while (0)
849 #define ll_pagevec_add(pv, pg)          (0)
850 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
851 #else
852 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
853         add_to_page_cache(pg, mapping, off, gfp)
854 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
855 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
856 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
857 #endif
858
859 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
860 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
861 #define HAVE_NODE_TO_CPUMASK
862 #endif
863
864 #endif /* __KERNEL__ */
865 #endif /* _COMPAT25_H */