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 (c) 2003, 2010, Oracle and/or its affiliates. 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
 200 #ifdef HAVE_BLKDEV_PUT_2ARGS
 201 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 202 #else
 203 #define ll_blkdev_put(a, b) blkdev_put(a)
 204 #endif
 205
 206 #ifdef HAVE_DENTRY_OPEN_4ARGS
 207 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 208 #else
 209 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 210 #endif
 211
 212 #include <linux/writeback.h>
 213
 214 static inline int cfs_cleanup_group_info(void)
 215 {
 216         struct group_info *ginfo;
 217
 218         ginfo = groups_alloc(0);
 219         if (!ginfo)
 220                 return -ENOMEM;
 221
 222         set_current_groups(ginfo);
 223         put_group_info(ginfo);
 224
 225         return 0;
 226 }
 227
 228 #define __set_page_ll_data(page, llap) \
 229         do {       \
 230                 page_cache_get(page); \
 231                 SetPagePrivate(page); \
 232                 set_page_private(page, (unsigned long)llap); \
 233         } while (0)
 234 #define __clear_page_ll_data(page) \
 235         do {       \
 236                 ClearPagePrivate(page); \
 237                 set_page_private(page, 0); \
 238                 page_cache_release(page); \
 239         } while(0)
 240
 241 #define kiobuf bio
 242
 243 #include <linux/proc_fs.h>
 244
 245 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 246 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 247 extern void __d_rehash(struct dentry *dentry, int lock);
 248 #endif
 249
 250 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 251 #define d_move_locked(dentry, target) __d_move(dentry, target)
 252 extern void __d_move(struct dentry *dentry, struct dentry *target);
 253 #endif
 254
 255 #ifdef HAVE_CAN_SLEEP_ARG
 256 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 257         flock_lock_file_wait(file, lock, can_sleep)
 258 #else
 259 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 260         flock_lock_file_wait(file, lock)
 261 #endif
 262
 263 #define CheckWriteback(page, cmd) \
 264         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 265          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 266
 267 #ifdef HAVE_PAGE_LIST
 268 static inline int mapping_has_pages(struct address_space *mapping)
 269 {
 270         int rc = 1;
 271
 272         ll_pgcache_lock(mapping);
 273         if (cfs_list_empty(&mapping->dirty_pages) &&
 274             cfs_list_empty(&mapping->clean_pages) &&
 275             cfs_list_empty(&mapping->locked_pages)) {
 276                 rc = 0;
 277         }
 278         ll_pgcache_unlock(mapping);
 279
 280         return rc;
 281 }
 282 #else
 283 static inline int mapping_has_pages(struct address_space *mapping)
 284 {
 285         return mapping->nrpages > 0;
 286 }
 287 #endif
 288
 289 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 290 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 291 #else
 292 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 293 #endif
 294
 295 #ifdef HAVE_SECURITY_PLUG
 296 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 297                 vfs_symlink(dir, dentry, mnt, path, mode)
 298 #else
 299 #ifdef HAVE_4ARGS_VFS_SYMLINK
 300 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 301                 vfs_symlink(dir, dentry, path, mode)
 302 #else
 303 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 304                        vfs_symlink(dir, dentry, path)
 305 #endif
 306
 307 #define ll_set_dflags(dentry, flags) do { \
 308                 cfs_spin_lock(&dentry->d_lock); \
 309                 dentry->d_flags |= flags; \
 310                 cfs_spin_unlock(&dentry->d_lock); \
 311         } while(0)
 312 #endif
 313
 314 #ifndef container_of
 315 #define container_of(ptr, type, member) ({                      \
 316                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 317                 (type *)( (char *)__mptr - offsetof(type,member) );})
 318 #endif
 319
 320 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 321 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 322 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 323
 324 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 325 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 326 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 327
 328 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 329 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 330 #endif
 331
 332 #include <linux/mpage.h>        /* for generic_writepages */
 333 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 334 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 335 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 336                                            loff_t start, loff_t end)
 337 {
 338         int rc;
 339         struct writeback_control wbc = {
 340                 .sync_mode = WB_SYNC_ALL,
 341                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 342         };
 343
 344 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 345         wbc.range_start = start;
 346         wbc.range_end = end;
 347 #else
 348         wbc.start = start;
 349         wbc.end = end;
 350 #endif
 351
 352 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 353         if (!mapping_cap_writeback_dirty(mapping))
 354                 rc = 0;
 355 #else
 356         if (mapping->backing_dev_info->memory_backed)
 357                 rc = 0;
 358 #endif
 359         /* do_writepages() */
 360         else if (mapping->a_ops->writepages)
 361                 rc = mapping->a_ops->writepages(mapping, &wbc);
 362         else
 363                 rc = generic_writepages(mapping, &wbc);
 364         return rc;
 365 }
 366 #else
 367 int filemap_fdatawrite_range(struct address_space *mapping,
 368                              loff_t start, loff_t end);
 369 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 370
 371 #ifdef HAVE_VFS_KERN_MOUNT
 372 static inline struct vfsmount *
 373 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 374 {
 375         struct file_system_type *type = get_fs_type(fstype);
 376         struct vfsmount *mnt;
 377         if (!type)
 378                 return ERR_PTR(-ENODEV);
 379         mnt = vfs_kern_mount(type, flags, name, data);
 380         cfs_module_put(type->owner);
 381         return mnt;
 382 }
 383 #else
 384 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 385 #endif
 386
 387 #ifdef HAVE_STATFS_DENTRY_PARAM
 388 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 389 #else
 390 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 391 #endif
 392
 393 #ifndef HAVE_SB_TIME_GRAN
 394 #ifndef HAVE_S_TIME_GRAN
 395 #error Need s_time_gran patch!
 396 #endif
 397 static inline u32 get_sb_time_gran(struct super_block *sb)
 398 {
 399         return sb->s_time_gran;
 400 }
 401 #endif
 402
 403 #ifdef HAVE_RW_TREE_LOCK
 404 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 405 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 406 #else
 407 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 408 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 409 #endif
 410
 411 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 412 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 413 #else
 414 static inline
 415 int ll_unregister_blkdev(unsigned int dev, const char *name)
 416 {
 417         unregister_blkdev(dev, name);
 418         return 0;
 419 }
 420 #endif
 421
 422 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 423 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 424 #else
 425 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 426 #endif
 427
 428 #ifdef HAVE_INODE_BLKSIZE
 429 #define ll_inode_blksize(a)     (a)->i_blksize
 430 #else
 431 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 432 #endif
 433
 434 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 435 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 436 #else
 437 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 438 #endif
 439
 440 #ifndef HAVE_D_OBTAIN_ALIAS
 441 /* The old d_alloc_anon() didn't free the inode reference on error
 442  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 443 static inline struct dentry *d_obtain_alias(struct inode *inode)
 444 {
 445         struct dentry *anon = d_alloc_anon(inode);
 446
 447         if (anon == NULL)
 448                 iput(inode);
 449
 450         return anon;
 451 }
 452 #endif
 453
 454 /* add a lustre compatible layer for crypto API */
 455 #include <linux/crypto.h>
 456 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 457 #define ll_crypto_hash          crypto_hash
 458 #define ll_crypto_cipher        crypto_blkcipher
 459 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 460 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 461 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 462 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 463 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 464 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 465                 crypto_alloc_blkcipher(name ,type, mask)
 466 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 467                 crypto_blkcipher_setkey(tfm, key, keylen)
 468 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 469                 crypto_blkcipher_set_iv(tfm, src, len)
 470 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 471                 crypto_blkcipher_get_iv(tfm, dst, len)
 472 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 473                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 474 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 475                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 476 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 477                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 478 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 479                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 480
 481 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 482                                  u8 *key, unsigned int *keylen,
 483                                  struct scatterlist *sg,
 484                                  unsigned int size, u8 *result)
 485 {
 486         struct hash_desc desc;
 487         int              rv;
 488         desc.tfm   = tfm;
 489         desc.flags = 0;
 490         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 491         if (rv) {
 492                 CERROR("failed to hash setkey: %d\n", rv);
 493                 return rv;
 494         }
 495         return crypto_hash_digest(&desc, sg, size, result);
 496 }
 497 static inline
 498 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 499 {
 500         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 501 }
 502 static inline
 503 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 504 {
 505         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 506 }
 507
 508 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 509 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 510 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 511 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 512 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 513 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 514 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 515 #include <linux/scatterlist.h>
 516 #define ll_crypto_hash          crypto_tfm
 517 #define ll_crypto_cipher        crypto_tfm
 518 #ifndef HAVE_STRUCT_HASH_DESC
 519 struct hash_desc {
 520         struct ll_crypto_hash *tfm;
 521         u32                    flags;
 522 };
 523 #endif
 524 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 525 struct blkcipher_desc {
 526         struct ll_crypto_cipher *tfm;
 527         void                    *info;
 528         u32                      flags;
 529 };
 530 #endif
 531 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 532         crypto_cipher_setkey(tfm, key, keylen)
 533 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 534         crypto_cipher_set_iv(tfm, src, len)
 535 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 536         crypto_cipher_get_iv(tfm, dst, len)
 537 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 538         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 539 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 540         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 541 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 542         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 543 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 544         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 545
 546 static inline
 547 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 548                                                    u32 type, u32 mask)
 549 {
 550         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 551         const char *pan = algname;
 552         u32         flag = 0;
 553
 554         if (strncmp("cbc(", algname, 4) == 0)
 555                 flag |= CRYPTO_TFM_MODE_CBC;
 556         else if (strncmp("ecb(", algname, 4) == 0)
 557                 flag |= CRYPTO_TFM_MODE_ECB;
 558         if (flag) {
 559                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 560                 if (vp) {
 561                         memcpy(buf, algname + 4, vp - algname - 4);
 562                         buf[vp - algname - 4] = '\0';
 563                         pan = buf;
 564                 } else {
 565                         flag = 0;
 566                 }
 567         }
 568         return crypto_alloc_tfm(pan, flag);
 569 }
 570
 571 static inline
 572 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 573 {
 574         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 575         const char *pan = alg;
 576
 577         if (strncmp("hmac(", alg, 5) == 0) {
 578                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 579                 if (vp) {
 580                         memcpy(buf, alg+ 5, vp - alg- 5);
 581                         buf[vp - alg - 5] = 0x00;
 582                         pan = buf;
 583                 }
 584         }
 585         return crypto_alloc_tfm(pan, 0);
 586 }
 587 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 588 {
 589        crypto_digest_init(desc->tfm); return 0;
 590 }
 591 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 592                                         struct scatterlist *sg,
 593                                         unsigned int nbytes)
 594 {
 595         struct scatterlist *sl = sg;
 596         unsigned int        count;
 597                 /*
 598                  * This way is very weakness. We must ensure that
 599                  * the sum of sg[0..i]->length isn't greater than nbytes.
 600                  * In the upstream kernel the crypto_hash_update() also
 601                  * via the nbytes computed the count of sg[...].
 602                  * The old style is more safely. but it gone.
 603                  */
 604         for (count = 0; nbytes > 0; count ++, sl ++) {
 605                 nbytes -= sl->length;
 606         }
 607         crypto_digest_update(desc->tfm, sg, count); return 0;
 608 }
 609 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 610 {
 611         crypto_digest_final(desc->tfm, out); return 0;
 612 }
 613 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 614                                  u8 *key, unsigned int *keylen,
 615                                  struct scatterlist *sg,
 616                                  unsigned int nbytes,
 617                                  u8 *out)
 618 {
 619         struct scatterlist *sl = sg;
 620         int                 count;
 621         for (count = 0; nbytes > 0; count ++, sl ++) {
 622                 nbytes -= sl->length;
 623         }
 624         crypto_hmac(tfm, key, keylen, sg, count, out);
 625         return 0;
 626 }
 627
 628 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 629 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 630 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 631 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 632 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 633 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 634 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 635 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 636 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 637 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 638
 639 #ifndef HAVE_SYNCHRONIZE_RCU
 640 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 641 #ifndef synchronize_rcu
 642 #define synchronize_rcu() synchronize_kernel()
 643 #endif
 644 #endif
 645
 646 #ifdef HAVE_FILE_REMOVE_SUID
 647 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 648 #else
 649 # ifdef HAVE_SECURITY_PLUG
 650 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 651 # else
 652 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 653 # endif
 654 #endif
 655
 656 #ifdef HAVE_SECURITY_PLUG
 657 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 658 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 659 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 660 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 661 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 662                 vfs_mknod(dir,entry,mnt,mode,dev)
 663 #define ll_security_inode_unlink(dir,entry,mnt)         \
 664                 security_inode_unlink(dir,entry,mnt)
 665 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 666                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 667 #else
 668 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 669 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 670 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 671 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 672 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 673 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 674 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 675                 vfs_rename(old,old_dir,new,new_dir)
 676 #endif /* HAVE_SECURITY_PLUG */
 677
 678 #ifdef for_each_possible_cpu
 679 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 680 #elif defined(for_each_cpu)
 681 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 682 #endif
 683
 684 #ifndef cpu_to_node
 685 #define cpu_to_node(cpu)         0
 686 #endif
 687
 688 #ifdef HAVE_REGISTER_SHRINKER
 689 typedef int (*cfs_shrinker_t)(int nr_to_scan, gfp_t gfp_mask);
 690
 691 static inline
 692 struct shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
 693 {
 694         struct shrinker *s;
 695
 696         s = kmalloc(sizeof(*s), GFP_KERNEL);
 697         if (s == NULL)
 698                 return (NULL);
 699
 700         s->shrink = func;
 701         s->seeks = seek;
 702
 703         register_shrinker(s);
 704
 705         return s;
 706 }
 707
 708 static inline
 709 void cfs_remove_shrinker(struct shrinker *shrinker)
 710 {
 711         if (shrinker == NULL)
 712                 return;
 713
 714         unregister_shrinker(shrinker);
 715         kfree(shrinker);
 716 }
 717 #endif
 718
 719 #ifdef HAVE_BIO_ENDIO_2ARG
 720 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 721 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 722 #else
 723 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 724 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 725 #endif
 726
 727 #ifdef HAVE_FS_STRUCT_USE_PATH
 728 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 729 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 730 #define cfs_path_put(nd)     path_put(&(nd)->path)
 731 #else
 732 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 733 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 734 #define cfs_path_put(nd)     path_release(nd)
 735 #endif
 736
 737 #ifndef abs
 738 static inline int abs(int x)
 739 {
 740         return (x < 0) ? -x : x;
 741 }
 742 #endif
 743
 744 #ifndef labs
 745 static inline long labs(long x)
 746 {
 747         return (x < 0) ? -x : x;
 748 }
 749 #endif /* HAVE_REGISTER_SHRINKER */
 750
 751 #ifdef HAVE_INVALIDATE_INODE_PAGES
 752 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 753 #endif
 754
 755 #ifdef HAVE_INODE_IPRIVATE
 756 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 757 #else
 758 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 759 #endif
 760
 761 #ifndef SLAB_DESTROY_BY_RCU
 762 #define CFS_SLAB_DESTROY_BY_RCU 0
 763 #else
 764 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 765 #endif
 766
 767 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 768 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 769 #else
 770 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 771 #endif
 772
 773 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 774 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 775 #else
 776 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 777 #endif
 778
 779 static inline int
 780 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 781 {
 782         if (sb->s_qcop->quota_on) {
 783                 return sb->s_qcop->quota_on(sb, off, ver, name
 784 #ifdef HAVE_QUOTA_ON_5ARGS
 785                                             , remount
 786 #endif
 787                                            );
 788         }
 789         else
 790                 return -ENOSYS;
 791 }
 792
 793 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 794 {
 795         if (sb->s_qcop->quota_off) {
 796                 return sb->s_qcop->quota_off(sb, off
 797 #ifdef HAVE_QUOTA_OFF_3ARGS
 798                                              , remount
 799 #endif
 800                                             );
 801         }
 802         else
 803                 return -ENOSYS;
 804 }
 805
 806 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 807 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 808 #endif
 809
 810 #ifdef HAVE_DQUOT_INIT
 811 # define ll_vfs_dq_init DQUOT_INIT
 812 # define ll_vfs_dq_drop DQUOT_DROP
 813 #else
 814 # define ll_vfs_dq_init vfs_dq_init
 815 # define ll_vfs_dq_drop vfs_dq_drop
 816 #endif
 817
 818 #ifdef HAVE_BDI_INIT
 819 #define ll_bdi_init(bdi)    bdi_init(bdi)
 820 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 821 #else
 822 #define ll_bdi_init(bdi)    0
 823 #define ll_bdi_destroy(bdi) do { } while(0)
 824 #endif
 825
 826 #ifdef HAVE_NEW_BACKING_DEV_INFO
 827 #define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 828 #else
 829 #define ll_bdi_wb_cnt(bdi) 1
 830 #endif
 831
 832 #endif /* __KERNEL__ */
 833 #endif /* _COMPAT25_H */