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 <linux/fs_struct.h>
  47 #include <libcfs/linux/portals_compat25.h>
  48
  49 #include <linux/lustre_patchless_compat.h>
  50
  51 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  52 struct ll_iattr {
  53         struct iattr    iattr;
  54         unsigned int    ia_attr_flags;
  55 };
  56 #else
  57 #define ll_iattr iattr
  58 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  59
  60 #ifdef HAVE_FS_STRUCT_USE_PATH
  61 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  62                                  struct dentry *dentry)
  63 {
  64         struct path path;
  65         struct path old_pwd;
  66
  67         path.mnt = mnt;
  68         path.dentry = dentry;
  69         write_lock(&fs->lock);
  70         old_pwd = fs->pwd;
  71         path_get(&path);
  72         fs->pwd = path;
  73         write_unlock(&fs->lock);
  74
  75         if (old_pwd.dentry)
  76                 path_put(&old_pwd);
  77 }
  78
  79 #else
  80
  81 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  82                 struct dentry *dentry)
  83 {
  84         struct dentry *old_pwd;
  85         struct vfsmount *old_pwdmnt;
  86
  87         cfs_write_lock(&fs->lock);
  88         old_pwd = fs->pwd;
  89         old_pwdmnt = fs->pwdmnt;
  90         fs->pwdmnt = mntget(mnt);
  91         fs->pwd = dget(dentry);
  92         cfs_write_unlock(&fs->lock);
  93
  94         if (old_pwd) {
  95                 dput(old_pwd);
  96                 mntput(old_pwdmnt);
  97         }
  98 }
  99 #endif
 100
 101 /*
 102  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 103  * ATTR_* attributes (see bug 13828)
 104  */
 105 #define ATTR_BLOCKS    (1 << 27)
 106
 107 #if HAVE_INODE_I_MUTEX
 108 #define UNLOCK_INODE_MUTEX(inode) \
 109 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 110 #define LOCK_INODE_MUTEX(inode) \
 111 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 112 #define LOCK_INODE_MUTEX_PARENT(inode) \
 113 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 114 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 115 #else
 116 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 117 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 118 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 119 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 120 #endif /* HAVE_INODE_I_MUTEX */
 121
 122 #ifdef HAVE_SEQ_LOCK
 123 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 124 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 125 #else
 126 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 127 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 128 #endif
 129
 130 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 131 #define d_child d_u.d_child
 132 #define d_rcu d_u.d_rcu
 133 #endif
 134
 135 #ifdef HAVE_DQUOTOFF_MUTEX
 136 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 137 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 138 #else
 139 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 140 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 141 #endif /* HAVE_DQUOTOFF_MUTEX */
 142
 143 #define current_ngroups current_cred()->group_info->ngroups
 144 #define current_groups current_cred()->group_info->small_block
 145
 146 #ifndef page_private
 147 #define page_private(page) ((page)->private)
 148 #define set_page_private(page, v) ((page)->private = (v))
 149 #endif
 150
 151 #ifndef HAVE_GFP_T
 152 #define gfp_t int
 153 #endif
 154
 155 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 156 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 157
 158 #define ll_kernel_locked()      kernel_locked()
 159
 160 /*
 161  * OBD need working random driver, thus all our
 162  * initialization routines must be called after device
 163  * driver initialization
 164  */
 165 #ifndef MODULE
 166 #undef module_init
 167 #define module_init(a)     late_initcall(a)
 168 #endif
 169
 170 /* XXX our code should be using the 2.6 calls, not the other way around */
 171 #ifdef HAVE_TRYLOCK_PAGE
 172 #define TestSetPageLocked(page)         (!trylock_page(page))
 173 #endif
 174
 175 #define Page_Uptodate(page)             PageUptodate(page)
 176 #define ll_redirty_page(page)           set_page_dirty(page)
 177
 178 #define KDEVT_INIT(val)                 (val)
 179
 180 #define LTIME_S(time)                   (time.tv_sec)
 181 #define ll_path_lookup                  path_lookup
 182 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 183
 184 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 185 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 186 #define ll_call_writepage(inode, page)  \
 187                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 188 #define ll_invalidate_inode_pages(inode) \
 189                                 invalidate_inode_pages((inode)->i_mapping)
 190 #define ll_truncate_complete_page(page) \
 191                                 truncate_complete_page(page->mapping, page)
 192
 193 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 194 #define ll_dev_t                        dev_t
 195 #define kdev_t                          dev_t
 196 #define to_kdev_t(dev)                  (dev)
 197 #define kdev_t_to_nr(dev)               (dev)
 198 #define val_to_kdev(dev)                (dev)
 199 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, (void *)(data));
 200
 201 #ifdef HAVE_BLKDEV_PUT_2ARGS
 202 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 203 #else
 204 #define ll_blkdev_put(a, b) blkdev_put(a)
 205 #endif
 206
 207 #ifdef HAVE_DENTRY_OPEN_4ARGS
 208 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 209 #else
 210 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 211 #endif
 212
 213 #include <linux/writeback.h>
 214
 215 static inline int cfs_cleanup_group_info(void)
 216 {
 217         struct group_info *ginfo;
 218
 219         ginfo = groups_alloc(0);
 220         if (!ginfo)
 221                 return -ENOMEM;
 222
 223         set_current_groups(ginfo);
 224         put_group_info(ginfo);
 225
 226         return 0;
 227 }
 228
 229 #define __set_page_ll_data(page, llap) \
 230         do {       \
 231                 page_cache_get(page); \
 232                 SetPagePrivate(page); \
 233                 set_page_private(page, (unsigned long)llap); \
 234         } while (0)
 235 #define __clear_page_ll_data(page) \
 236         do {       \
 237                 ClearPagePrivate(page); \
 238                 set_page_private(page, 0); \
 239                 page_cache_release(page); \
 240         } while(0)
 241
 242 #define kiobuf bio
 243
 244 #include <linux/proc_fs.h>
 245
 246 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 247 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 248 extern void __d_rehash(struct dentry *dentry, int lock);
 249 #endif
 250
 251 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 252 #define d_move_locked(dentry, target) __d_move(dentry, target)
 253 extern void __d_move(struct dentry *dentry, struct dentry *target);
 254 #endif
 255
 256 #ifdef HAVE_CAN_SLEEP_ARG
 257 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 258         flock_lock_file_wait(file, lock, can_sleep)
 259 #else
 260 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 261         flock_lock_file_wait(file, lock)
 262 #endif
 263
 264 #define CheckWriteback(page, cmd) \
 265         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 266          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 267
 268 #ifdef HAVE_PAGE_LIST
 269 static inline int mapping_has_pages(struct address_space *mapping)
 270 {
 271         int rc = 1;
 272
 273         ll_pgcache_lock(mapping);
 274         if (cfs_list_empty(&mapping->dirty_pages) &&
 275             cfs_list_empty(&mapping->clean_pages) &&
 276             cfs_list_empty(&mapping->locked_pages)) {
 277                 rc = 0;
 278         }
 279         ll_pgcache_unlock(mapping);
 280
 281         return rc;
 282 }
 283 #else
 284 static inline int mapping_has_pages(struct address_space *mapping)
 285 {
 286         return mapping->nrpages > 0;
 287 }
 288 #endif
 289
 290 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 291 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 292 #else
 293 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 294 #endif
 295
 296 #ifdef HAVE_SECURITY_PLUG
 297 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 298                 vfs_symlink(dir, dentry, mnt, path, mode)
 299 #else
 300 #ifdef HAVE_4ARGS_VFS_SYMLINK
 301 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 302                 vfs_symlink(dir, dentry, path, mode)
 303 #else
 304 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 305                        vfs_symlink(dir, dentry, path)
 306 #endif
 307 #endif
 308
 309 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 310 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 311 #else
 312 #define ll_set_dflags(dentry, flags) do { \
 313                 cfs_spin_lock(&dentry->d_lock); \
 314                 dentry->d_flags |= flags; \
 315                 cfs_spin_unlock(&dentry->d_lock); \
 316         } while(0)
 317 #endif
 318
 319 #ifndef container_of
 320 #define container_of(ptr, type, member) ({                      \
 321                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 322                 (type *)( (char *)__mptr - offsetof(type,member) );})
 323 #endif
 324
 325 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 326 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 327 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 328
 329 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 330 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 331 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 332
 333 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 334 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 335 #endif
 336
 337 #include <linux/mpage.h>        /* for generic_writepages */
 338 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 339 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 340 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 341                                            loff_t start, loff_t end)
 342 {
 343         int rc;
 344         struct writeback_control wbc = {
 345                 .sync_mode = WB_SYNC_ALL,
 346                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 347         };
 348
 349 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 350         wbc.range_start = start;
 351         wbc.range_end = end;
 352 #else
 353         wbc.start = start;
 354         wbc.end = end;
 355 #endif
 356
 357 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 358         if (!mapping_cap_writeback_dirty(mapping))
 359                 rc = 0;
 360 #else
 361         if (mapping->backing_dev_info->memory_backed)
 362                 rc = 0;
 363 #endif
 364         /* do_writepages() */
 365         else if (mapping->a_ops->writepages)
 366                 rc = mapping->a_ops->writepages(mapping, &wbc);
 367         else
 368                 rc = generic_writepages(mapping, &wbc);
 369         return rc;
 370 }
 371 #else
 372 int filemap_fdatawrite_range(struct address_space *mapping,
 373                              loff_t start, loff_t end);
 374 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 375
 376 #ifdef HAVE_VFS_KERN_MOUNT
 377 static inline struct vfsmount *
 378 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 379 {
 380         struct file_system_type *type = get_fs_type(fstype);
 381         struct vfsmount *mnt;
 382         if (!type)
 383                 return ERR_PTR(-ENODEV);
 384         mnt = vfs_kern_mount(type, flags, name, data);
 385         cfs_module_put(type->owner);
 386         return mnt;
 387 }
 388 #else
 389 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 390 #endif
 391
 392 #ifdef HAVE_STATFS_DENTRY_PARAM
 393 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 394 #else
 395 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 396 #endif
 397
 398 #ifndef HAVE_SB_TIME_GRAN
 399 #ifndef HAVE_S_TIME_GRAN
 400 #error Need s_time_gran patch!
 401 #endif
 402 static inline u32 get_sb_time_gran(struct super_block *sb)
 403 {
 404         return sb->s_time_gran;
 405 }
 406 #endif
 407
 408 #ifdef HAVE_RW_TREE_LOCK
 409 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 410 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 411 #else
 412 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 413 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 414 #endif
 415
 416 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 417 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 418 #else
 419 static inline
 420 int ll_unregister_blkdev(unsigned int dev, const char *name)
 421 {
 422         unregister_blkdev(dev, name);
 423         return 0;
 424 }
 425 #endif
 426
 427 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 428 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 429 #else
 430 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 431 #endif
 432
 433 #ifdef HAVE_INODE_BLKSIZE
 434 #define ll_inode_blksize(a)     (a)->i_blksize
 435 #else
 436 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 437 #endif
 438
 439 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 440 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 441 #else
 442 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 443 #endif
 444
 445 #ifndef HAVE_D_OBTAIN_ALIAS
 446 #define d_obtain_alias(inode) d_alloc_anon(inode)
 447 #endif
 448
 449 /* add a lustre compatible layer for crypto API */
 450 #include <linux/crypto.h>
 451 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 452 #define ll_crypto_hash          crypto_hash
 453 #define ll_crypto_cipher        crypto_blkcipher
 454 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 455 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 456 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 457 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 458 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 459 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 460                 crypto_alloc_blkcipher(name ,type, mask)
 461 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 462                 crypto_blkcipher_setkey(tfm, key, keylen)
 463 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 464                 crypto_blkcipher_set_iv(tfm, src, len)
 465 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 466                 crypto_blkcipher_get_iv(tfm, dst, len)
 467 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 468                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 469 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 470                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 471 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 472                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 473 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 474                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 475
 476 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 477                                  u8 *key, unsigned int *keylen,
 478                                  struct scatterlist *sg,
 479                                  unsigned int size, u8 *result)
 480 {
 481         struct hash_desc desc;
 482         int              rv;
 483         desc.tfm   = tfm;
 484         desc.flags = 0;
 485         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 486         if (rv) {
 487                 CERROR("failed to hash setkey: %d\n", rv);
 488                 return rv;
 489         }
 490         return crypto_hash_digest(&desc, sg, size, result);
 491 }
 492 static inline
 493 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 494 {
 495         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 496 }
 497 static inline
 498 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 499 {
 500         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 501 }
 502
 503 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 504 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 505 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 506 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 507 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 508 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 509 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 510 #include <linux/scatterlist.h>
 511 #define ll_crypto_hash          crypto_tfm
 512 #define ll_crypto_cipher        crypto_tfm
 513 #ifndef HAVE_STRUCT_HASH_DESC
 514 struct hash_desc {
 515         struct ll_crypto_hash *tfm;
 516         u32                    flags;
 517 };
 518 #endif
 519 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 520 struct blkcipher_desc {
 521         struct ll_crypto_cipher *tfm;
 522         void                    *info;
 523         u32                      flags;
 524 };
 525 #endif
 526 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 527         crypto_cipher_setkey(tfm, key, keylen)
 528 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 529         crypto_cipher_set_iv(tfm, src, len)
 530 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 531         crypto_cipher_get_iv(tfm, dst, len)
 532 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 533         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 534 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 535         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 536 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 537         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 538 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 539         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 540
 541 static inline
 542 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 543                                                    u32 type, u32 mask)
 544 {
 545         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 546         const char *pan = algname;
 547         u32         flag = 0;
 548
 549         if (strncmp("cbc(", algname, 4) == 0)
 550                 flag |= CRYPTO_TFM_MODE_CBC;
 551         else if (strncmp("ecb(", algname, 4) == 0)
 552                 flag |= CRYPTO_TFM_MODE_ECB;
 553         if (flag) {
 554                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 555                 if (vp) {
 556                         memcpy(buf, algname + 4, vp - algname - 4);
 557                         buf[vp - algname - 4] = '\0';
 558                         pan = buf;
 559                 } else {
 560                         flag = 0;
 561                 }
 562         }
 563         return crypto_alloc_tfm(pan, flag);
 564 }
 565
 566 static inline
 567 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 568 {
 569         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 570         const char *pan = alg;
 571
 572         if (strncmp("hmac(", alg, 5) == 0) {
 573                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 574                 if (vp) {
 575                         memcpy(buf, alg+ 5, vp - alg- 5);
 576                         buf[vp - alg - 5] = 0x00;
 577                         pan = buf;
 578                 }
 579         }
 580         return crypto_alloc_tfm(pan, 0);
 581 }
 582 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 583 {
 584        crypto_digest_init(desc->tfm); return 0;
 585 }
 586 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 587                                         struct scatterlist *sg,
 588                                         unsigned int nbytes)
 589 {
 590         struct scatterlist *sl = sg;
 591         unsigned int        count;
 592                 /*
 593                  * This way is very weakness. We must ensure that
 594                  * the sum of sg[0..i]->length isn't greater than nbytes.
 595                  * In the upstream kernel the crypto_hash_update() also
 596                  * via the nbytes computed the count of sg[...].
 597                  * The old style is more safely. but it gone.
 598                  */
 599         for (count = 0; nbytes > 0; count ++, sl ++) {
 600                 nbytes -= sl->length;
 601         }
 602         crypto_digest_update(desc->tfm, sg, count); return 0;
 603 }
 604 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 605 {
 606         crypto_digest_final(desc->tfm, out); return 0;
 607 }
 608 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 609                                  u8 *key, unsigned int *keylen,
 610                                  struct scatterlist *sg,
 611                                  unsigned int nbytes,
 612                                  u8 *out)
 613 {
 614         struct scatterlist *sl = sg;
 615         int                 count;
 616         for (count = 0; nbytes > 0; count ++, sl ++) {
 617                 nbytes -= sl->length;
 618         }
 619         crypto_hmac(tfm, key, keylen, sg, count, out);
 620         return 0;
 621 }
 622
 623 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 624 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 625 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 626 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 627 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 628 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 629 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 630 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 631 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 632 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 633
 634 #ifndef HAVE_SYNCHRONIZE_RCU
 635 #define synchronize_rcu() synchronize_kernel()
 636 #endif
 637
 638 #ifdef HAVE_FILE_REMOVE_SUID
 639 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 640 #else
 641 # ifdef HAVE_SECURITY_PLUG
 642 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 643 # else
 644 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 645 # endif
 646 #endif
 647
 648 #ifdef HAVE_SECURITY_PLUG
 649 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 650 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 651 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 652 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 653 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 654                 vfs_mknod(dir,entry,mnt,mode,dev)
 655 #define ll_security_inode_unlink(dir,entry,mnt)         \
 656                 security_inode_unlink(dir,entry,mnt)
 657 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 658                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 659 #else
 660 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 661 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 662 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 663 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 664 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 665 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 666 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 667                 vfs_rename(old,old_dir,new,new_dir)
 668 #endif /* HAVE_SECURITY_PLUG */
 669
 670 #ifdef for_each_possible_cpu
 671 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 672 #elif defined(for_each_cpu)
 673 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 674 #endif
 675
 676 #ifndef cpu_to_node
 677 #define cpu_to_node(cpu)         0
 678 #endif
 679
 680 #ifdef HAVE_REGISTER_SHRINKER
 681 typedef int (*cfs_shrinker_t)(int nr_to_scan, gfp_t gfp_mask);
 682
 683 static inline
 684 struct shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
 685 {
 686         struct shrinker *s;
 687
 688         s = kmalloc(sizeof(*s), GFP_KERNEL);
 689         if (s == NULL)
 690                 return (NULL);
 691
 692         s->shrink = func;
 693         s->seeks = seek;
 694
 695         register_shrinker(s);
 696
 697         return s;
 698 }
 699
 700 static inline
 701 void cfs_remove_shrinker(struct shrinker *shrinker)
 702 {
 703         if (shrinker == NULL)
 704                 return;
 705
 706         unregister_shrinker(shrinker);
 707         kfree(shrinker);
 708 }
 709 #endif
 710
 711 #ifdef HAVE_BIO_ENDIO_2ARG
 712 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 713 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 714 #else
 715 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 716 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 717 #endif
 718
 719 #ifdef HAVE_FS_STRUCT_USE_PATH
 720 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 721 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 722 #define cfs_path_put(nd)     path_put(&(nd)->path)
 723 #else
 724 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 725 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 726 #define cfs_path_put(nd)     path_release(nd)
 727 #endif
 728
 729 #ifndef abs
 730 static inline int abs(int x)
 731 {
 732         return (x < 0) ? -x : x;
 733 }
 734 #endif
 735
 736 #ifndef labs
 737 static inline long labs(long x)
 738 {
 739         return (x < 0) ? -x : x;
 740 }
 741 #endif /* HAVE_REGISTER_SHRINKER */
 742
 743 #ifdef HAVE_INVALIDATE_INODE_PAGES
 744 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 745 #endif
 746
 747 #ifdef HAVE_INODE_IPRIVATE
 748 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 749 #else
 750 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 751 #endif
 752
 753 #ifndef SLAB_DESTROY_BY_RCU
 754 #define CFS_SLAB_DESTROY_BY_RCU 0
 755 #else
 756 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 757 #endif
 758
 759 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 760 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 761 #else
 762 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 763 #endif
 764
 765 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 766 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 767 #else
 768 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 769 #endif
 770
 771 static inline int
 772 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 773 {
 774         if (sb->s_qcop->quota_on) {
 775                 return sb->s_qcop->quota_on(sb, off, ver, name
 776 #ifdef HAVE_QUOTA_ON_5ARGS
 777                                             , remount
 778 #endif
 779                                            );
 780         }
 781         else
 782                 return -ENOSYS;
 783 }
 784
 785 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 786 {
 787         if (sb->s_qcop->quota_off) {
 788                 return sb->s_qcop->quota_off(sb, off
 789 #ifdef HAVE_QUOTA_OFF_3ARGS
 790                                              , remount
 791 #endif
 792                                             );
 793         }
 794         else
 795                 return -ENOSYS;
 796 }
 797
 798 #endif /* __KERNEL__ */
 799 #endif /* _COMPAT25_H */