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 #ifdef HAVE_FS_STRUCT_USE_PATH
  60 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  61                                  struct dentry *dentry)
  62 {
  63         struct path path;
  64         struct path old_pwd;
  65
  66         path.mnt = mnt;
  67         path.dentry = dentry;
  68         write_lock(&fs->lock);
  69         old_pwd = fs->pwd;
  70         path_get(&path);
  71         fs->pwd = path;
  72         write_unlock(&fs->lock);
  73
  74         if (old_pwd.dentry)
  75                 path_put(&old_pwd);
  76 }
  77
  78 #else
  79
  80 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  81                 struct dentry *dentry)
  82 {
  83         struct dentry *old_pwd;
  84         struct vfsmount *old_pwdmnt;
  85
  86         cfs_write_lock(&fs->lock);
  87         old_pwd = fs->pwd;
  88         old_pwdmnt = fs->pwdmnt;
  89         fs->pwdmnt = mntget(mnt);
  90         fs->pwd = dget(dentry);
  91         cfs_write_unlock(&fs->lock);
  92
  93         if (old_pwd) {
  94                 dput(old_pwd);
  95                 mntput(old_pwdmnt);
  96         }
  97 }
  98 #endif
  99
 100 /*
 101  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 102  * ATTR_* attributes (see bug 13828)
 103  */
 104 #define ATTR_BLOCKS    (1 << 27)
 105
 106 #if HAVE_INODE_I_MUTEX
 107 #define UNLOCK_INODE_MUTEX(inode) \
 108 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 109 #define LOCK_INODE_MUTEX(inode) \
 110 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 111 #define LOCK_INODE_MUTEX_PARENT(inode) \
 112 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 113 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 114 #else
 115 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 116 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 117 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 118 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 119 #endif /* HAVE_INODE_I_MUTEX */
 120
 121 #ifdef HAVE_SEQ_LOCK
 122 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 123 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 124 #else
 125 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 126 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 127 #endif
 128
 129 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 130 #define d_child d_u.d_child
 131 #define d_rcu d_u.d_rcu
 132 #endif
 133
 134 #ifdef HAVE_DQUOTOFF_MUTEX
 135 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 136 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 137 #else
 138 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 139 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 140 #endif /* HAVE_DQUOTOFF_MUTEX */
 141
 142 #define current_ngroups current->group_info->ngroups
 143 #define current_groups current->group_info->small_block
 144
 145 #ifndef page_private
 146 #define page_private(page) ((page)->private)
 147 #define set_page_private(page, v) ((page)->private = (v))
 148 #endif
 149
 150 #ifndef HAVE_GFP_T
 151 #define gfp_t int
 152 #endif
 153
 154 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 155 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 156
 157 #define ll_kernel_locked()      kernel_locked()
 158
 159 /*
 160  * OBD need working random driver, thus all our
 161  * initialization routines must be called after device
 162  * driver initialization
 163  */
 164 #ifndef MODULE
 165 #undef module_init
 166 #define module_init(a)     late_initcall(a)
 167 #endif
 168
 169 /* XXX our code should be using the 2.6 calls, not the other way around */
 170 #ifdef HAVE_TRYLOCK_PAGE
 171 #define TestSetPageLocked(page)         (!trylock_page(page))
 172 #endif
 173
 174 #define Page_Uptodate(page)             PageUptodate(page)
 175 #define ll_redirty_page(page)           set_page_dirty(page)
 176
 177 #define KDEVT_INIT(val)                 (val)
 178
 179 #define LTIME_S(time)                   (time.tv_sec)
 180 #define ll_path_lookup                  path_lookup
 181 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 182
 183 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 184 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 185 #define ll_call_writepage(inode, page)  \
 186                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 187 #define ll_invalidate_inode_pages(inode) \
 188                                 invalidate_inode_pages((inode)->i_mapping)
 189 #define ll_truncate_complete_page(page) \
 190                                 truncate_complete_page(page->mapping, page)
 191
 192 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 193 #define ll_dev_t                        dev_t
 194 #define kdev_t                          dev_t
 195 #define to_kdev_t(dev)                  (dev)
 196 #define kdev_t_to_nr(dev)               (dev)
 197 #define val_to_kdev(dev)                (dev)
 198 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, (void *)(data));
 199
 200 #include <linux/writeback.h>
 201
 202 static inline int cfs_cleanup_group_info(void)
 203 {
 204         struct group_info *ginfo;
 205
 206         ginfo = groups_alloc(0);
 207         if (!ginfo)
 208                 return -ENOMEM;
 209
 210         set_current_groups(ginfo);
 211         put_group_info(ginfo);
 212
 213         return 0;
 214 }
 215
 216 #define __set_page_ll_data(page, llap) \
 217         do {       \
 218                 page_cache_get(page); \
 219                 SetPagePrivate(page); \
 220                 set_page_private(page, (unsigned long)llap); \
 221         } while (0)
 222 #define __clear_page_ll_data(page) \
 223         do {       \
 224                 ClearPagePrivate(page); \
 225                 set_page_private(page, 0); \
 226                 page_cache_release(page); \
 227         } while(0)
 228
 229 #define kiobuf bio
 230
 231 #include <linux/proc_fs.h>
 232
 233 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 234 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 235 extern void __d_rehash(struct dentry *dentry, int lock);
 236 #endif
 237
 238 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 239 #define d_move_locked(dentry, target) __d_move(dentry, target)
 240 extern void __d_move(struct dentry *dentry, struct dentry *target);
 241 #endif
 242
 243 #ifdef HAVE_CAN_SLEEP_ARG
 244 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 245         flock_lock_file_wait(file, lock, can_sleep)
 246 #else
 247 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 248         flock_lock_file_wait(file, lock)
 249 #endif
 250
 251 #define CheckWriteback(page, cmd) \
 252         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 253          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 254
 255 #ifdef HAVE_PAGE_LIST
 256 static inline int mapping_has_pages(struct address_space *mapping)
 257 {
 258         int rc = 1;
 259
 260         ll_pgcache_lock(mapping);
 261         if (cfs_list_empty(&mapping->dirty_pages) &&
 262             cfs_list_empty(&mapping->clean_pages) &&
 263             cfs_list_empty(&mapping->locked_pages)) {
 264                 rc = 0;
 265         }
 266         ll_pgcache_unlock(mapping);
 267
 268         return rc;
 269 }
 270 #else
 271 static inline int mapping_has_pages(struct address_space *mapping)
 272 {
 273         return mapping->nrpages > 0;
 274 }
 275 #endif
 276
 277 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 278 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 279 #else
 280 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 281 #endif
 282
 283 #ifdef HAVE_SECURITY_PLUG
 284 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 285                 vfs_symlink(dir, dentry, mnt, path, mode)
 286 #else
 287 #ifdef HAVE_4ARGS_VFS_SYMLINK
 288 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 289                 vfs_symlink(dir, dentry, path, mode)
 290 #else
 291 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 292                        vfs_symlink(dir, dentry, path)
 293 #endif
 294 #endif
 295
 296 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 297 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 298 #else
 299 #define ll_set_dflags(dentry, flags) do { \
 300                 cfs_spin_lock(&dentry->d_lock); \
 301                 dentry->d_flags |= flags; \
 302                 cfs_spin_unlock(&dentry->d_lock); \
 303         } while(0)
 304 #endif
 305
 306 #ifndef container_of
 307 #define container_of(ptr, type, member) ({                      \
 308                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 309                 (type *)( (char *)__mptr - offsetof(type,member) );})
 310 #endif
 311
 312 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 313 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 314 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 315
 316 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 317 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 318 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 319
 320 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 321 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 322 #endif
 323
 324 #include <linux/mpage.h>        /* for generic_writepages */
 325 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 326 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 327 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 328                                            loff_t start, loff_t end)
 329 {
 330         int rc;
 331         struct writeback_control wbc = {
 332                 .sync_mode = WB_SYNC_ALL,
 333                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 334         };
 335
 336 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 337         wbc.range_start = start;
 338         wbc.range_end = end;
 339 #else
 340         wbc.start = start;
 341         wbc.end = end;
 342 #endif
 343
 344 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 345         if (!mapping_cap_writeback_dirty(mapping))
 346                 rc = 0;
 347 #else
 348         if (mapping->backing_dev_info->memory_backed)
 349                 rc = 0;
 350 #endif
 351         /* do_writepages() */
 352         else if (mapping->a_ops->writepages)
 353                 rc = mapping->a_ops->writepages(mapping, &wbc);
 354         else
 355                 rc = generic_writepages(mapping, &wbc);
 356         return rc;
 357 }
 358 #else
 359 int filemap_fdatawrite_range(struct address_space *mapping,
 360                              loff_t start, loff_t end);
 361 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 362
 363 #ifdef HAVE_VFS_KERN_MOUNT
 364 static inline struct vfsmount *
 365 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 366 {
 367         struct file_system_type *type = get_fs_type(fstype);
 368         struct vfsmount *mnt;
 369         if (!type)
 370                 return ERR_PTR(-ENODEV);
 371         mnt = vfs_kern_mount(type, flags, name, data);
 372         cfs_module_put(type->owner);
 373         return mnt;
 374 }
 375 #else
 376 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 377 #endif
 378
 379 #ifdef HAVE_STATFS_DENTRY_PARAM
 380 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 381 #else
 382 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 383 #endif
 384
 385 #ifndef HAVE_SB_TIME_GRAN
 386 #ifndef HAVE_S_TIME_GRAN
 387 #error Need s_time_gran patch!
 388 #endif
 389 static inline u32 get_sb_time_gran(struct super_block *sb)
 390 {
 391         return sb->s_time_gran;
 392 }
 393 #endif
 394
 395 #ifdef HAVE_RW_TREE_LOCK
 396 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 397 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 398 #else
 399 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 400 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 401 #endif
 402
 403 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 404 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 405 #else
 406 static inline
 407 int ll_unregister_blkdev(unsigned int dev, const char *name)
 408 {
 409         unregister_blkdev(dev, name);
 410         return 0;
 411 }
 412 #endif
 413
 414 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 415 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 416 #else
 417 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 418 #endif
 419
 420 #ifdef HAVE_INODE_BLKSIZE
 421 #define ll_inode_blksize(a)     (a)->i_blksize
 422 #else
 423 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 424 #endif
 425
 426 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 427 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 428 #else
 429 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 430 #endif
 431
 432 /* add a lustre compatible layer for crypto API */
 433 #include <linux/crypto.h>
 434 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 435 #define ll_crypto_hash          crypto_hash
 436 #define ll_crypto_cipher        crypto_blkcipher
 437 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 438 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 439 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 440 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 441 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 442 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 443                 crypto_alloc_blkcipher(name ,type, mask)
 444 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 445                 crypto_blkcipher_setkey(tfm, key, keylen)
 446 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 447                 crypto_blkcipher_set_iv(tfm, src, len)
 448 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 449                 crypto_blkcipher_get_iv(tfm, dst, len)
 450 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 451                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 452 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 453                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 454 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 455                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 456 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 457                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 458
 459 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 460                                  u8 *key, unsigned int *keylen,
 461                                  struct scatterlist *sg,
 462                                  unsigned int size, u8 *result)
 463 {
 464         struct hash_desc desc;
 465         int              rv;
 466         desc.tfm   = tfm;
 467         desc.flags = 0;
 468         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 469         if (rv) {
 470                 CERROR("failed to hash setkey: %d\n", rv);
 471                 return rv;
 472         }
 473         return crypto_hash_digest(&desc, sg, size, result);
 474 }
 475 static inline
 476 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 477 {
 478         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 479 }
 480 static inline
 481 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 482 {
 483         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 484 }
 485
 486 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 487 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 488 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 489 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 490 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 491 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 492 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 493 #include <linux/scatterlist.h>
 494 #define ll_crypto_hash          crypto_tfm
 495 #define ll_crypto_cipher        crypto_tfm
 496 #ifndef HAVE_STRUCT_HASH_DESC
 497 struct hash_desc {
 498         struct ll_crypto_hash *tfm;
 499         u32                    flags;
 500 };
 501 #endif
 502 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 503 struct blkcipher_desc {
 504         struct ll_crypto_cipher *tfm;
 505         void                    *info;
 506         u32                      flags;
 507 };
 508 #endif
 509 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 510         crypto_cipher_setkey(tfm, key, keylen)
 511 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 512         crypto_cipher_set_iv(tfm, src, len)
 513 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 514         crypto_cipher_get_iv(tfm, dst, len)
 515 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 516         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 517 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 518         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 519 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 520         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 521 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 522         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 523
 524 static inline
 525 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 526                                                    u32 type, u32 mask)
 527 {
 528         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 529         const char *pan = algname;
 530         u32         flag = 0;
 531
 532         if (strncmp("cbc(", algname, 4) == 0)
 533                 flag |= CRYPTO_TFM_MODE_CBC;
 534         else if (strncmp("ecb(", algname, 4) == 0)
 535                 flag |= CRYPTO_TFM_MODE_ECB;
 536         if (flag) {
 537                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 538                 if (vp) {
 539                         memcpy(buf, algname + 4, vp - algname - 4);
 540                         buf[vp - algname - 4] = '\0';
 541                         pan = buf;
 542                 } else {
 543                         flag = 0;
 544                 }
 545         }
 546         return crypto_alloc_tfm(pan, flag);
 547 }
 548
 549 static inline
 550 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 551 {
 552         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 553         const char *pan = alg;
 554
 555         if (strncmp("hmac(", alg, 5) == 0) {
 556                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 557                 if (vp) {
 558                         memcpy(buf, alg+ 5, vp - alg- 5);
 559                         buf[vp - alg - 5] = 0x00;
 560                         pan = buf;
 561                 }
 562         }
 563         return crypto_alloc_tfm(pan, 0);
 564 }
 565 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 566 {
 567        crypto_digest_init(desc->tfm); return 0;
 568 }
 569 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 570                                         struct scatterlist *sg,
 571                                         unsigned int nbytes)
 572 {
 573         struct scatterlist *sl = sg;
 574         unsigned int        count;
 575                 /*
 576                  * This way is very weakness. We must ensure that
 577                  * the sum of sg[0..i]->length isn't greater than nbytes.
 578                  * In the upstream kernel the crypto_hash_update() also
 579                  * via the nbytes computed the count of sg[...].
 580                  * The old style is more safely. but it gone.
 581                  */
 582         for (count = 0; nbytes > 0; count ++, sl ++) {
 583                 nbytes -= sl->length;
 584         }
 585         crypto_digest_update(desc->tfm, sg, count); return 0;
 586 }
 587 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 588 {
 589         crypto_digest_final(desc->tfm, out); return 0;
 590 }
 591 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 592                                  u8 *key, unsigned int *keylen,
 593                                  struct scatterlist *sg,
 594                                  unsigned int nbytes,
 595                                  u8 *out)
 596 {
 597         struct scatterlist *sl = sg;
 598         int                 count;
 599         for (count = 0; nbytes > 0; count ++, sl ++) {
 600                 nbytes -= sl->length;
 601         }
 602         crypto_hmac(tfm, key, keylen, sg, count, out);
 603         return 0;
 604 }
 605
 606 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 607 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 608 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 609 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 610 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 611 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 612 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 613 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 614 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 615 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 616
 617 #ifndef HAVE_SYNCHRONIZE_RCU
 618 #define synchronize_rcu() synchronize_kernel()
 619 #endif
 620
 621 #ifdef HAVE_FILE_REMOVE_SUID
 622 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 623 #else
 624 # ifdef HAVE_SECURITY_PLUG
 625 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 626 # else
 627 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 628 # endif
 629 #endif
 630
 631 #ifdef HAVE_SECURITY_PLUG
 632 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 633 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 634 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 635 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 636 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 637                 vfs_mknod(dir,entry,mnt,mode,dev)
 638 #define ll_security_inode_unlink(dir,entry,mnt)         \
 639                 security_inode_unlink(dir,entry,mnt)
 640 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 641                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 642 #else
 643 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 644 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 645 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 646 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 647 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 648 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 649 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 650                 vfs_rename(old,old_dir,new,new_dir)
 651 #endif /* HAVE_SECURITY_PLUG */
 652
 653 #ifdef for_each_possible_cpu
 654 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 655 #elif defined(for_each_cpu)
 656 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 657 #endif
 658
 659 #ifndef cpu_to_node
 660 #define cpu_to_node(cpu)         0
 661 #endif
 662
 663 #ifdef HAVE_REGISTER_SHRINKER
 664 typedef int (*cfs_shrinker_t)(int nr_to_scan, gfp_t gfp_mask);
 665
 666 static inline
 667 struct shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
 668 {
 669         struct shrinker *s;
 670
 671         s = kmalloc(sizeof(*s), GFP_KERNEL);
 672         if (s == NULL)
 673                 return (NULL);
 674
 675         s->shrink = func;
 676         s->seeks = seek;
 677
 678         register_shrinker(s);
 679
 680         return s;
 681 }
 682
 683 static inline
 684 void cfs_remove_shrinker(struct shrinker *shrinker)
 685 {
 686         if (shrinker == NULL)
 687                 return;
 688
 689         unregister_shrinker(shrinker);
 690         kfree(shrinker);
 691 }
 692 #endif
 693
 694 #ifdef HAVE_BIO_ENDIO_2ARG
 695 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 696 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 697 #else
 698 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 699 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 700 #endif
 701
 702 #ifdef HAVE_FS_STRUCT_USE_PATH
 703 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 704 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 705 #define cfs_path_put(nd)     path_put(&(nd)->path)
 706 #else
 707 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 708 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 709 #define cfs_path_put(nd)     path_release(nd)
 710 #endif
 711
 712 #ifndef abs
 713 static inline int abs(int x)
 714 {
 715         return (x < 0) ? -x : x;
 716 }
 717 #endif
 718
 719 #ifndef labs
 720 static inline long labs(long x)
 721 {
 722         return (x < 0) ? -x : x;
 723 }
 724 #endif /* HAVE_REGISTER_SHRINKER */
 725
 726 #ifdef HAVE_INVALIDATE_INODE_PAGES
 727 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 728 #endif
 729
 730 #ifdef HAVE_INODE_IPRIVATE
 731 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 732 #else
 733 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 734 #endif
 735
 736 #ifndef SLAB_DESTROY_BY_RCU
 737 #define CFS_SLAB_DESTROY_BY_RCU 0
 738 #else
 739 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 740 #endif
 741
 742 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 743 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 744 #else
 745 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 746 #endif
 747
 748 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 749 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 750 #else
 751 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 752 #endif
 753
 754 static inline int
 755 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 756 {
 757         if (sb->s_qcop->quota_on) {
 758                 return sb->s_qcop->quota_on(sb, off, ver, name
 759 #ifdef HAVE_QUOTA_ON_5ARGS
 760                                             , remount
 761 #endif
 762                                            );
 763         }
 764         else
 765                 return -ENOSYS;
 766 }
 767
 768 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 769 {
 770         if (sb->s_qcop->quota_off) {
 771                 return sb->s_qcop->quota_off(sb, off
 772 #ifdef HAVE_QUOTA_OFF_3ARGS
 773                                              , remount
 774 #endif
 775                                             );
 776         }
 777         else
 778                 return -ENOSYS;
 779 }
 780
 781 #endif /* __KERNEL__ */
 782 #endif /* _COMPAT25_H */