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 [sun.com URL with a
  20  * copy of GPLv2].
  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 TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
  92 #else
  93 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
  94 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
  95 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
  96 #endif /* HAVE_INODE_I_MUTEX */
  97
  98 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
  99 #define d_child d_u.d_child
 100 #define d_rcu d_u.d_rcu
 101 #endif
 102
 103 #ifdef HAVE_DQUOTOFF_MUTEX
 104 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
 105 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
 106 #else
 107 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
 108 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
 109 #endif /* HAVE_DQUOTOFF_MUTEX */
 110
 111 #define current_ngroups current->group_info->ngroups
 112 #define current_groups current->group_info->small_block
 113
 114 #ifndef page_private
 115 #define page_private(page) ((page)->private)
 116 #define set_page_private(page, v) ((page)->private = (v))
 117 #endif
 118
 119 #ifndef HAVE_GFP_T
 120 #define gfp_t int
 121 #endif
 122
 123 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 124 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 125
 126 #define ll_kernel_locked()      kernel_locked()
 127
 128 /*
 129  * OBD need working random driver, thus all our
 130  * initialization routines must be called after device
 131  * driver initialization
 132  */
 133 #ifndef MODULE
 134 #undef module_init
 135 #define module_init(a)     late_initcall(a)
 136 #endif
 137
 138 /* XXX our code should be using the 2.6 calls, not the other way around */
 139 #define TryLockPage(page)               TestSetPageLocked(page)
 140 #define Page_Uptodate(page)             PageUptodate(page)
 141 #define ll_redirty_page(page)           set_page_dirty(page)
 142
 143 #define KDEVT_INIT(val)                 (val)
 144
 145 #define LTIME_S(time)                   (time.tv_sec)
 146 #define ll_path_lookup                  path_lookup
 147 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 148
 149 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 150 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 151 #define ll_call_writepage(inode, page)  \
 152                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 153 #define ll_invalidate_inode_pages(inode) \
 154                                 invalidate_inode_pages((inode)->i_mapping)
 155 #define ll_truncate_complete_page(page) \
 156                                 truncate_complete_page(page->mapping, page)
 157
 158 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 159 #define ll_dev_t                        dev_t
 160 #define kdev_t                          dev_t
 161 #define to_kdev_t(dev)                  (dev)
 162 #define kdev_t_to_nr(dev)               (dev)
 163 #define val_to_kdev(dev)                (dev)
 164 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, data);
 165
 166 #include <linux/writeback.h>
 167
 168 static inline int cleanup_group_info(void)
 169 {
 170         struct group_info *ginfo;
 171
 172         ginfo = groups_alloc(0);
 173         if (!ginfo)
 174                 return -ENOMEM;
 175
 176         set_current_groups(ginfo);
 177         put_group_info(ginfo);
 178
 179         return 0;
 180 }
 181
 182 #define __set_page_ll_data(page, llap) \
 183         do {       \
 184                 page_cache_get(page); \
 185                 SetPagePrivate(page); \
 186                 set_page_private(page, (unsigned long)llap); \
 187         } while (0)
 188 #define __clear_page_ll_data(page) \
 189         do {       \
 190                 ClearPagePrivate(page); \
 191                 set_page_private(page, 0); \
 192                 page_cache_release(page); \
 193         } while(0)
 194
 195 #define kiobuf bio
 196
 197 #include <linux/proc_fs.h>
 198
 199 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 200 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 201 extern void __d_rehash(struct dentry *dentry, int lock);
 202 #endif
 203
 204 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 205 #define d_move_locked(dentry, target) __d_move(dentry, target)
 206 extern void __d_move(struct dentry *dentry, struct dentry *target);
 207 #endif
 208
 209 #ifdef HAVE_CAN_SLEEP_ARG
 210 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 211         flock_lock_file_wait(file, lock, can_sleep)
 212 #else
 213 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 214         flock_lock_file_wait(file, lock)
 215 #endif
 216
 217 #define CheckWriteback(page, cmd) \
 218         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 219          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 220
 221 #ifdef HAVE_PAGE_LIST
 222 static inline int mapping_has_pages(struct address_space *mapping)
 223 {
 224         int rc = 1;
 225
 226         ll_pgcache_lock(mapping);
 227         if (list_empty(&mapping->dirty_pages) &&
 228             list_empty(&mapping->clean_pages) &&
 229             list_empty(&mapping->locked_pages)) {
 230                 rc = 0;
 231         }
 232         ll_pgcache_unlock(mapping);
 233
 234         return rc;
 235 }
 236 #else
 237 static inline int mapping_has_pages(struct address_space *mapping)
 238 {
 239         return mapping->nrpages > 0;
 240 }
 241 #endif
 242
 243 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 244 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 245 #else
 246 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 247 #endif
 248
 249 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 250 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 251 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
 252 #else
 253 #define ll_set_dflags(dentry, flags) do { \
 254                 spin_lock(&dentry->d_lock); \
 255                 dentry->d_flags |= flags; \
 256                 spin_unlock(&dentry->d_lock); \
 257         } while(0)
 258 #ifdef HAVE_SECURITY_PLUG
 259 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 260                 vfs_symlink(dir, dentry, mnt, path, mode)
 261 #else
 262 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 263                 vfs_symlink(dir, dentry, path, mode)
 264 #endif
 265 #endif
 266
 267 #ifndef container_of
 268 #define container_of(ptr, type, member) ({                      \
 269                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 270                 (type *)( (char *)__mptr - offsetof(type,member) );})
 271 #endif
 272
 273 #ifdef HAVE_I_ALLOC_SEM
 274 #define UP_WRITE_I_ALLOC_SEM(i)   do { up_write(&(i)->i_alloc_sem); } while (0)
 275 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
 276 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 277
 278 #define UP_READ_I_ALLOC_SEM(i)    do { up_read(&(i)->i_alloc_sem); } while (0)
 279 #define DOWN_READ_I_ALLOC_SEM(i)  do { down_read(&(i)->i_alloc_sem); } while (0)
 280 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 281 #else
 282 #define UP_READ_I_ALLOC_SEM(i)              do { } while (0)
 283 #define DOWN_READ_I_ALLOC_SEM(i)            do { } while (0)
 284 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i)  do { } while (0)
 285
 286 #define UP_WRITE_I_ALLOC_SEM(i)             do { } while (0)
 287 #define DOWN_WRITE_I_ALLOC_SEM(i)           do { } while (0)
 288 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
 289 #endif
 290
 291 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 292 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 293 #endif
 294
 295 #ifndef HAVE_FILEMAP_FDATAWRITE
 296 #define filemap_fdatawrite(mapping)      filemap_fdatasync(mapping)
 297 #endif
 298
 299 #ifdef HAVE_VFS_KERN_MOUNT
 300 static inline
 301 struct vfsmount *
 302 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 303 {
 304         struct file_system_type *type = get_fs_type(fstype);
 305         struct vfsmount *mnt;
 306         if (!type)
 307                 return ERR_PTR(-ENODEV);
 308         mnt = vfs_kern_mount(type, flags, name, data);
 309         module_put(type->owner);
 310         return mnt;
 311 }
 312 #else
 313 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 314 #endif
 315
 316 #ifndef HAVE_GENERIC_FILE_READ
 317 static inline
 318 ssize_t
 319 generic_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
 320 {
 321         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 322         struct kiocb kiocb;
 323         ssize_t ret;
 324
 325         init_sync_kiocb(&kiocb, filp);
 326         kiocb.ki_pos = *ppos;
 327         kiocb.ki_left = len;
 328
 329         ret = generic_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
 330         *ppos = kiocb.ki_pos;
 331         return ret;
 332 }
 333 #endif
 334
 335 #ifndef HAVE_GENERIC_FILE_WRITE
 336 static inline
 337 ssize_t
 338 generic_file_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
 339 {
 340         struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
 341         struct kiocb kiocb;
 342         ssize_t ret;
 343
 344         init_sync_kiocb(&kiocb, filp);
 345         kiocb.ki_pos = *ppos;
 346         kiocb.ki_left = len;
 347
 348         ret = generic_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
 349         *ppos = kiocb.ki_pos;
 350
 351         return ret;
 352 }
 353 #endif
 354
 355 #ifdef HAVE_STATFS_DENTRY_PARAM
 356 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 357 #else
 358 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 359 #endif
 360
 361 /* task_struct */
 362 #ifndef HAVE_TASK_PPTR
 363 #define p_pptr parent
 364 #endif
 365
 366 #ifndef HAVE_SB_TIME_GRAN
 367 #ifndef HAVE_S_TIME_GRAN
 368 #error Need s_time_gran patch!
 369 #endif
 370 static inline u32 get_sb_time_gran(struct super_block *sb)
 371 {
 372         return sb->s_time_gran;
 373 }
 374 #endif
 375
 376 #ifdef HAVE_RW_TREE_LOCK
 377 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 378 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 379 #else
 380 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
 381 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
 382 #endif
 383
 384 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 385 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 386 #else
 387 static inline
 388 int ll_unregister_blkdev(unsigned int dev, const char *name)
 389 {
 390         unregister_blkdev(dev, name);
 391         return 0;
 392 }
 393 #endif
 394
 395 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 396 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 397 #else
 398 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 399 #endif
 400
 401 #ifdef HAVE_INODE_BLKSIZE
 402 #define ll_inode_blksize(a)     (a)->i_blksize
 403 #else
 404 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 405 #endif
 406
 407 #ifndef HAVE_EXPORT_NR_FREE_BUFFER_PAGES
 408 static inline unsigned int ll_nr_free_buffer_pages(void)
 409 {
 410         struct sysinfo si;
 411
 412         si_meminfo(&si);
 413         return (unsigned int)(si.freeram - si.freehigh);
 414 }
 415 #else
 416 #define ll_nr_free_buffer_pages()       nr_free_buffer_pages()
 417 #endif
 418
 419 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 420 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 421 #else
 422 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 423 #endif
 424
 425 /* add a lustre compatible layer for crypto API */
 426 #include <linux/crypto.h>
 427 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 428 #define ll_crypto_hash          crypto_hash
 429 #define ll_crypto_cipher        crypto_blkcipher
 430 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 431 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 432 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 433 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 434 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 435 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 436                 crypto_alloc_blkcipher(name ,type, mask)
 437 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 438                 crypto_blkcipher_setkey(tfm, key, keylen)
 439 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 440                 crypto_blkcipher_set_iv(tfm, src, len)
 441 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 442                 crypto_blkcipher_get_iv(tfm, dst, len)
 443 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 444                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 445 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 446                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 447 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 448                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 449 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 450                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 451
 452 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 453                                  u8 *key, unsigned int *keylen,
 454                                  struct scatterlist *sg,
 455                                  unsigned int size, u8 *result)
 456 {
 457         struct hash_desc desc;
 458         int              rv;
 459         desc.tfm   = tfm;
 460         desc.flags = 0;
 461         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 462         if (rv) {
 463                 CERROR("failed to hash setkey: %d\n", rv);
 464                 return rv;
 465         }
 466         return crypto_hash_digest(&desc, sg, size, result);
 467 }
 468 static inline
 469 unsigned int crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 470 {
 471         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 472 }
 473 static inline
 474 unsigned int crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 475 {
 476         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 477 }
 478
 479 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 480 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 481 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 482 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 483 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 484 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 485 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 486 #include <linux/scatterlist.h>
 487 #define ll_crypto_hash          crypto_tfm
 488 #define ll_crypto_cipher        crypto_tfm
 489 struct hash_desc {
 490         struct ll_crypto_hash *tfm;
 491         u32                    flags;
 492 };
 493 struct blkcipher_desc {
 494         struct ll_crypto_cipher *tfm;
 495         void                    *info;
 496         u32                      flags;
 497 };
 498 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 499         crypto_cipher_setkey(tfm, key, keylen)
 500 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 501         crypto_cipher_set_iv(tfm, src, len)
 502 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 503         crypto_cipher_get_iv(tfm, dst, len)
 504 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 505         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 506 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 507         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 508 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 509         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 510 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 511         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 512
 513 extern struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(
 514                             const char * algname, u32 type, u32 mask);
 515 static inline
 516 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 517 {
 518         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 519         const char *pan = alg;
 520
 521         if (strncmp("hmac(", alg, 5) == 0) {
 522                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 523                 if (vp) {
 524                         memcpy(buf, alg+ 5, vp - alg- 5);
 525                         buf[vp - alg - 5] = 0x00;
 526                         pan = buf;
 527                 }
 528         }
 529         return crypto_alloc_tfm(pan, 0);
 530 }
 531 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 532 {
 533        crypto_digest_init(desc->tfm); return 0;
 534 }
 535 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 536                                         struct scatterlist *sg,
 537                                         unsigned int nbytes)
 538 {
 539         struct scatterlist *sl = sg;
 540         unsigned int        count;
 541                 /*
 542                  * This way is very weakness. We must ensure that
 543                  * the sum of sg[0..i]->length isn't greater than nbytes.
 544                  * In the upstream kernel the crypto_hash_update() also
 545                  * via the nbytes computed the count of sg[...].
 546                  * The old style is more safely. but it gone.
 547                  */
 548         for (count = 0; nbytes > 0; count ++, sl ++) {
 549                 nbytes -= sl->length;
 550         }
 551         crypto_digest_update(desc->tfm, sg, count); return 0;
 552 }
 553 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 554 {
 555         crypto_digest_final(desc->tfm, out); return 0;
 556 }
 557 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 558                                  u8 *key, unsigned int *keylen,
 559                                  struct scatterlist *sg,
 560                                  unsigned int nbytes,
 561                                  u8 *out)
 562 {
 563         struct scatterlist *sl = sg;
 564         int                 count;
 565         for (count = 0; nbytes > 0; count ++, sl ++) {
 566                 nbytes -= sl->length;
 567         }
 568         crypto_hmac(tfm, key, keylen, sg, count, out);
 569         return 0;
 570 }
 571
 572 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 573 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 574 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 575 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 576 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 577 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 578 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 579 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 580
 581 #ifdef HAVE_SECURITY_PLUG
 582 #define ll_remove_suid(inode,mnt)               remove_suid(inode,mnt)
 583 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 584 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 585 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 586 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 587 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 588                 vfs_mknod(dir,entry,mnt,mode,dev)
 589 #define ll_security_inode_unlink(dir,entry,mnt)         \
 590                 security_inode_unlink(dir,entry,mnt)
 591 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 592                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 593 #else
 594 #define ll_remove_suid(inode,mnt)               remove_suid(inode)
 595 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 596 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 597 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 598 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 599 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 600 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 601 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 602                 vfs_rename(old,old_dir,new,new_dir)
 603 #endif
 604
 605 #endif /* __KERNEL__ */
 606 #endif /* _COMPAT25_H */