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