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