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  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifdef __KERNEL__
  41
  42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  43 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  44 #endif
  45
  46 #include <libcfs/linux/portals_compat25.h>
  47
  48 #include <linux/lustre_patchless_compat.h>
  49
  50 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  51 struct ll_iattr {
  52         struct iattr    iattr;
  53         unsigned int    ia_attr_flags;
  54 };
  55 #else
  56 #define ll_iattr iattr
  57 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  58
  59 #ifndef HAVE_SET_FS_PWD
  60 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  61                 struct dentry *dentry)
  62 {
  63         struct dentry *old_pwd;
  64         struct vfsmount *old_pwdmnt;
  65
  66         write_lock(&fs->lock);
  67         old_pwd = fs->pwd;
  68         old_pwdmnt = fs->pwdmnt;
  69         fs->pwdmnt = mntget(mnt);
  70         fs->pwd = dget(dentry);
  71         write_unlock(&fs->lock);
  72
  73         if (old_pwd) {
  74                 dput(old_pwd);
  75                 mntput(old_pwdmnt);
  76         }
  77 }
  78 #else
  79 #define ll_set_fs_pwd set_fs_pwd
  80 #endif /* HAVE_SET_FS_PWD */
  81
  82 /*
  83  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
  84  * ATTR_* attributes (see bug 13828)
  85  */
  86 #define ATTR_BLOCKS    (1 << 27)
  87
  88 #if HAVE_INODE_I_MUTEX
  89 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
  90 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
  91 #define LOCK_INODE_MUTEX_PARENT(inode) \
  92 do {mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
  93 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
  94 #else
  95 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
  96 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
  97 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
  98 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
  99 #endif /* HAVE_INODE_I_MUTEX */
 100
 101 #ifdef HAVE_SEQ_LOCK
 102 #define LL_SEQ_LOCK(seq) mutex_lock(&(seq)->lock)
 103 #define LL_SEQ_UNLOCK(seq) mutex_unlock(&(seq)->lock)
 104 #else
 105 #define LL_SEQ_LOCK(seq) down(&(seq)->sem)
 106 #define LL_SEQ_UNLOCK(seq) up(&(seq)->sem)
 107 #endif
 108
 109 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 110 #define d_child d_u.d_child
 111 #define d_rcu d_u.d_rcu
 112 #endif
 113
 114 #ifdef HAVE_DQUOTOFF_MUTEX
 115 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
 116 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
 117 #else
 118 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
 119 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
 120 #endif /* HAVE_DQUOTOFF_MUTEX */
 121
 122 #define current_ngroups current->group_info->ngroups
 123 #define current_groups current->group_info->small_block
 124
 125 #ifndef page_private
 126 #define page_private(page) ((page)->private)
 127 #define set_page_private(page, v) ((page)->private = (v))
 128 #endif
 129
 130 #ifndef HAVE_GFP_T
 131 #define gfp_t int
 132 #endif
 133
 134 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 135 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 136
 137 #define ll_kernel_locked()      kernel_locked()
 138
 139 /*
 140  * OBD need working random driver, thus all our
 141  * initialization routines must be called after device
 142  * driver initialization
 143  */
 144 #ifndef MODULE
 145 #undef module_init
 146 #define module_init(a)     late_initcall(a)
 147 #endif
 148
 149 /* XXX our code should be using the 2.6 calls, not the other way around */
 150 #define TryLockPage(page)               TestSetPageLocked(page)
 151 #define Page_Uptodate(page)             PageUptodate(page)
 152 #define ll_redirty_page(page)           set_page_dirty(page)
 153
 154 #define KDEVT_INIT(val)                 (val)
 155
 156 #define LTIME_S(time)                   (time.tv_sec)
 157 #define ll_path_lookup                  path_lookup
 158 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 159
 160 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 161 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 162 #define ll_call_writepage(inode, page)  \
 163                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 164 #define ll_invalidate_inode_pages(inode) \
 165                                 invalidate_inode_pages((inode)->i_mapping)
 166 #define ll_truncate_complete_page(page) \
 167                                 truncate_complete_page(page->mapping, page)
 168
 169 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 170 #define ll_dev_t                        dev_t
 171 #define kdev_t                          dev_t
 172 #define to_kdev_t(dev)                  (dev)
 173 #define kdev_t_to_nr(dev)               (dev)
 174 #define val_to_kdev(dev)                (dev)
 175 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, data);
 176
 177 #include <linux/writeback.h>
 178
 179 static inline int cleanup_group_info(void)
 180 {
 181         struct group_info *ginfo;
 182
 183         ginfo = groups_alloc(0);
 184         if (!ginfo)
 185                 return -ENOMEM;
 186
 187         set_current_groups(ginfo);
 188         put_group_info(ginfo);
 189
 190         return 0;
 191 }
 192
 193 #define __set_page_ll_data(page, llap) \
 194         do {       \
 195                 page_cache_get(page); \
 196                 SetPagePrivate(page); \
 197                 set_page_private(page, (unsigned long)llap); \
 198         } while (0)
 199 #define __clear_page_ll_data(page) \
 200         do {       \
 201                 ClearPagePrivate(page); \
 202                 set_page_private(page, 0); \
 203                 page_cache_release(page); \
 204         } while(0)
 205
 206 #define kiobuf bio
 207
 208 #include <linux/proc_fs.h>
 209
 210 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 211 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 212 extern void __d_rehash(struct dentry *dentry, int lock);
 213 #endif
 214
 215 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 216 #define d_move_locked(dentry, target) __d_move(dentry, target)
 217 extern void __d_move(struct dentry *dentry, struct dentry *target);
 218 #endif
 219
 220 #ifdef HAVE_CAN_SLEEP_ARG
 221 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 222         flock_lock_file_wait(file, lock, can_sleep)
 223 #else
 224 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 225         flock_lock_file_wait(file, lock)
 226 #endif
 227
 228 #define CheckWriteback(page, cmd) \
 229         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 230          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 231
 232 #ifdef HAVE_PAGE_LIST
 233 static inline int mapping_has_pages(struct address_space *mapping)
 234 {
 235         int rc = 1;
 236
 237         ll_pgcache_lock(mapping);
 238         if (list_empty(&mapping->dirty_pages) &&
 239             list_empty(&mapping->clean_pages) &&
 240             list_empty(&mapping->locked_pages)) {
 241                 rc = 0;
 242         }
 243         ll_pgcache_unlock(mapping);
 244
 245         return rc;
 246 }
 247 #else
 248 static inline int mapping_has_pages(struct address_space *mapping)
 249 {
 250         return mapping->nrpages > 0;
 251 }
 252 #endif
 253
 254 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 255 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 256 #else
 257 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 258 #endif
 259
 260 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 261 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 262 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
 263 #else
 264 #define ll_set_dflags(dentry, flags) do { \
 265                 spin_lock(&dentry->d_lock); \
 266                 dentry->d_flags |= flags; \
 267                 spin_unlock(&dentry->d_lock); \
 268         } while(0)
 269 #ifdef HAVE_SECURITY_PLUG
 270 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 271                 vfs_symlink(dir, dentry, mnt, path, mode)
 272 #else
 273 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 274                 vfs_symlink(dir, dentry, path, mode)
 275 #endif
 276 #endif
 277
 278 #ifndef container_of
 279 #define container_of(ptr, type, member) ({                      \
 280                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 281                 (type *)( (char *)__mptr - offsetof(type,member) );})
 282 #endif
 283
 284 #ifdef HAVE_I_ALLOC_SEM
 285 #define UP_WRITE_I_ALLOC_SEM(i)   do { up_write(&(i)->i_alloc_sem); } while (0)
 286 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
 287 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 288
 289 #define UP_READ_I_ALLOC_SEM(i)    do { up_read(&(i)->i_alloc_sem); } while (0)
 290 #define DOWN_READ_I_ALLOC_SEM(i)  do { down_read(&(i)->i_alloc_sem); } while (0)
 291 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 292 #else
 293 #define UP_READ_I_ALLOC_SEM(i)              do { } while (0)
 294 #define DOWN_READ_I_ALLOC_SEM(i)            do { } while (0)
 295 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i)  do { } while (0)
 296
 297 #define UP_WRITE_I_ALLOC_SEM(i)             do { } while (0)
 298 #define DOWN_WRITE_I_ALLOC_SEM(i)           do { } while (0)
 299 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
 300 #endif
 301
 302 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 303 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 304 #endif
 305
 306 #ifndef HAVE_FILEMAP_FDATAWRITE
 307 #define filemap_fdatawrite(mapping)      filemap_fdatasync(mapping)
 308 #endif
 309
 310 #include <linux/mpage.h>        /* for generic_writepages */
 311 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 312 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 313 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 314                                            loff_t start, loff_t end)
 315 {
 316         int rc;
 317         struct writeback_control wbc = {
 318                 .sync_mode = WB_SYNC_ALL,
 319                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 320         };
 321
 322 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 323         wbc.range_start = start;
 324         wbc.range_end = end;
 325 #else
 326         wbc.start = start;
 327         wbc.end = end;
 328 #endif
 329
 330 #ifdef mapping_cap_writeback_dirty
 331         if (!mapping_cap_writeback_dirty(mapping))
 332                 rc = 0;
 333 #else
 334         if (mapping->backing_dev_info->memory_backed)
 335                 rc = 0;
 336 #endif
 337         /* do_writepages() */
 338         else if (mapping->a_ops->writepages)
 339                 rc = mapping->a_ops->writepages(mapping, &wbc);
 340         else
 341                 rc = generic_writepages(mapping, &wbc);
 342         return rc;
 343 }
 344 #else
 345 int filemap_fdatawrite_range(struct address_space *mapping,
 346                              loff_t start, loff_t end);
 347 #endif
 348
 349 #ifdef HAVE_VFS_KERN_MOUNT
 350 static inline
 351 struct vfsmount *
 352 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 353 {
 354         struct file_system_type *type = get_fs_type(fstype);
 355         struct vfsmount *mnt;
 356         if (!type)
 357                 return ERR_PTR(-ENODEV);
 358         mnt = vfs_kern_mount(type, flags, name, data);
 359         module_put(type->owner);
 360         return mnt;
 361 }
 362 #else
 363 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 364 #endif
 365
 366 #ifdef HAVE_STATFS_DENTRY_PARAM
 367 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 368 #else
 369 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 370 #endif
 371
 372 /* task_struct */
 373 #ifndef HAVE_TASK_PPTR
 374 #define p_pptr parent
 375 #endif
 376
 377 #ifndef HAVE_SB_TIME_GRAN
 378 #ifndef HAVE_S_TIME_GRAN
 379 #error Need s_time_gran patch!
 380 #endif
 381 static inline u32 get_sb_time_gran(struct super_block *sb)
 382 {
 383         return sb->s_time_gran;
 384 }
 385 #endif
 386
 387 #ifdef HAVE_RW_TREE_LOCK
 388 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 389 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 390 #else
 391 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
 392 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
 393 #endif
 394
 395 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 396 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 397 #else
 398 static inline
 399 int ll_unregister_blkdev(unsigned int dev, const char *name)
 400 {
 401         unregister_blkdev(dev, name);
 402         return 0;
 403 }
 404 #endif
 405
 406 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 407 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 408 #else
 409 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 410 #endif
 411
 412 #ifdef HAVE_INODE_BLKSIZE
 413 #define ll_inode_blksize(a)     (a)->i_blksize
 414 #else
 415 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 416 #endif
 417
 418 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 419 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 420 #else
 421 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 422 #endif
 423
 424 /* add a lustre compatible layer for crypto API */
 425 #include <linux/crypto.h>
 426 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 427 #define ll_crypto_hash          crypto_hash
 428 #define ll_crypto_cipher        crypto_blkcipher
 429 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 430 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 431 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 432 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 433 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 434 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 435                 crypto_alloc_blkcipher(name ,type, mask)
 436 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 437                 crypto_blkcipher_setkey(tfm, key, keylen)
 438 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 439                 crypto_blkcipher_set_iv(tfm, src, len)
 440 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 441                 crypto_blkcipher_get_iv(tfm, dst, len)
 442 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 443                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 444 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 445                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 446 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 447                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 448 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 449                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 450
 451 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 452                                  u8 *key, unsigned int *keylen,
 453                                  struct scatterlist *sg,
 454                                  unsigned int size, u8 *result)
 455 {
 456         struct hash_desc desc;
 457         int              rv;
 458         desc.tfm   = tfm;
 459         desc.flags = 0;
 460         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 461         if (rv) {
 462                 CERROR("failed to hash setkey: %d\n", rv);
 463                 return rv;
 464         }
 465         return crypto_hash_digest(&desc, sg, size, result);
 466 }
 467 static inline
 468 unsigned int crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 469 {
 470         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 471 }
 472 static inline
 473 unsigned int crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 474 {
 475         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 476 }
 477
 478 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 479 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 480 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 481 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 482 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 483 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 484 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 485 #include <linux/scatterlist.h>
 486 #define ll_crypto_hash          crypto_tfm
 487 #define ll_crypto_cipher        crypto_tfm
 488 struct hash_desc {
 489         struct ll_crypto_hash *tfm;
 490         u32                    flags;
 491 };
 492 struct blkcipher_desc {
 493         struct ll_crypto_cipher *tfm;
 494         void                    *info;
 495         u32                      flags;
 496 };
 497 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 498         crypto_cipher_setkey(tfm, key, keylen)
 499 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 500         crypto_cipher_set_iv(tfm, src, len)
 501 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 502         crypto_cipher_get_iv(tfm, dst, len)
 503 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 504         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 505 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 506         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 507 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 508         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 509 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 510         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 511
 512 static inline
 513 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 514                                                    u32 type, u32 mask)
 515 {
 516         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 517         const char *pan = algname;
 518         u32         flag = 0;
 519
 520         if (strncmp("cbc(", algname, 4) == 0)
 521                 flag |= CRYPTO_TFM_MODE_CBC;
 522         else if (strncmp("ecb(", algname, 4) == 0)
 523                 flag |= CRYPTO_TFM_MODE_ECB;
 524         if (flag) {
 525                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 526                 if (vp) {
 527                         memcpy(buf, algname + 4, vp - algname - 4);
 528                         buf[vp - algname - 4] = '\0';
 529                         pan = buf;
 530                 } else {
 531                         flag = 0;
 532                 }
 533         }
 534         return crypto_alloc_tfm(pan, flag);
 535 }
 536
 537 static inline
 538 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 539 {
 540         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 541         const char *pan = alg;
 542
 543         if (strncmp("hmac(", alg, 5) == 0) {
 544                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 545                 if (vp) {
 546                         memcpy(buf, alg+ 5, vp - alg- 5);
 547                         buf[vp - alg - 5] = 0x00;
 548                         pan = buf;
 549                 }
 550         }
 551         return crypto_alloc_tfm(pan, 0);
 552 }
 553 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 554 {
 555        crypto_digest_init(desc->tfm); return 0;
 556 }
 557 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 558                                         struct scatterlist *sg,
 559                                         unsigned int nbytes)
 560 {
 561         struct scatterlist *sl = sg;
 562         unsigned int        count;
 563                 /*
 564                  * This way is very weakness. We must ensure that
 565                  * the sum of sg[0..i]->length isn't greater than nbytes.
 566                  * In the upstream kernel the crypto_hash_update() also
 567                  * via the nbytes computed the count of sg[...].
 568                  * The old style is more safely. but it gone.
 569                  */
 570         for (count = 0; nbytes > 0; count ++, sl ++) {
 571                 nbytes -= sl->length;
 572         }
 573         crypto_digest_update(desc->tfm, sg, count); return 0;
 574 }
 575 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 576 {
 577         crypto_digest_final(desc->tfm, out); return 0;
 578 }
 579 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 580                                  u8 *key, unsigned int *keylen,
 581                                  struct scatterlist *sg,
 582                                  unsigned int nbytes,
 583                                  u8 *out)
 584 {
 585         struct scatterlist *sl = sg;
 586         int                 count;
 587         for (count = 0; nbytes > 0; count ++, sl ++) {
 588                 nbytes -= sl->length;
 589         }
 590         crypto_hmac(tfm, key, keylen, sg, count, out);
 591         return 0;
 592 }
 593
 594 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 595 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 596 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 597 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 598 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 599 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 600 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 601 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 602
 603 #ifdef HAVE_SECURITY_PLUG
 604 #define ll_remove_suid(inode,mnt)               remove_suid(inode,mnt)
 605 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 606 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 607 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 608 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 609 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 610                 vfs_mknod(dir,entry,mnt,mode,dev)
 611 #define ll_security_inode_unlink(dir,entry,mnt)         \
 612                 security_inode_unlink(dir,entry,mnt)
 613 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 614                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 615 #else
 616 #define ll_remove_suid(inode,mnt)               remove_suid(inode)
 617 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 618 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 619 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 620 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 621 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 622 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 623 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 624                 vfs_rename(old,old_dir,new,new_dir)
 625 #endif
 626
 627 #ifndef get_cpu
 628 #ifdef CONFIG_PREEMPT
 629 #define get_cpu()       ({ preempt_disable(); smp_processor_id(); })
 630 #define put_cpu()       preempt_enable()
 631 #else
 632 #define get_cpu()       smp_processor_id()
 633 #define put_cpu()
 634 #endif
 635 #endif /* get_cpu & put_cpu */
 636
 637 #ifndef for_each_possible_cpu
 638 #define for_each_possible_cpu(i) for_each_cpu(i)
 639 #endif
 640
 641 #ifndef cpu_to_node
 642 #define cpu_to_node(cpu)         0
 643 #endif
 644
 645 #ifndef abs
 646 static inline int abs(int x)
 647 {
 648         return (x < 0) ? -x : x;
 649 }
 650 #endif
 651
 652 #ifndef labs
 653 static inline long labs(long x)
 654 {
 655         return (x < 0) ? -x : x;
 656 }
 657 #endif
 658
 659 /* Using kernel fls(). Userspace will use one defined in user-bitops.h. */
 660 #ifndef __fls
 661 #define __fls fls
 662 #endif
 663
 664 #ifdef HAVE_INVALIDATE_INODE_PAGES
 665 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 666 #endif
 667
 668 #endif /* __KERNEL__ */
 669 #endif /* _COMPAT25_H */