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  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  */
  38
  39 #ifndef _LINUX_COMPAT25_H
  40 #define _LINUX_COMPAT25_H
  41
  42 #ifdef __KERNEL__
  43
  44 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  45 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  46 #endif
  47
  48 #include <linux/fs_struct.h>
  49 #include <linux/namei.h>
  50 #include <libcfs/linux/portals_compat25.h>
  51
  52 #include <linux/lustre_patchless_compat.h>
  53
  54 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
  55  * definition allows to compile lustre client on more OS platforms. */
  56 #ifndef SEEK_SET
  57  #define SEEK_SET 0
  58  #define SEEK_CUR 1
  59  #define SEEK_END 2
  60 #endif
  61
  62 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  63 struct ll_iattr {
  64         struct iattr    iattr;
  65         unsigned int    ia_attr_flags;
  66 };
  67 #else
  68 #define ll_iattr iattr
  69 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  70
  71 #ifdef HAVE_FS_STRUCT_RWLOCK
  72 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  73 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  74 #else
  75 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  76 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  77 #endif
  78
  79 #ifdef HAVE_FS_STRUCT_USE_PATH
  80 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  81                                  struct dentry *dentry)
  82 {
  83         struct path path;
  84         struct path old_pwd;
  85
  86         path.mnt = mnt;
  87         path.dentry = dentry;
  88         LOCK_FS_STRUCT(fs);
  89         old_pwd = fs->pwd;
  90         path_get(&path);
  91         fs->pwd = path;
  92         UNLOCK_FS_STRUCT(fs);
  93
  94         if (old_pwd.dentry)
  95                 path_put(&old_pwd);
  96 }
  97
  98 #else
  99
 100 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
 101                 struct dentry *dentry)
 102 {
 103         struct dentry *old_pwd;
 104         struct vfsmount *old_pwdmnt;
 105
 106         LOCK_FS_STRUCT(fs);
 107         old_pwd = fs->pwd;
 108         old_pwdmnt = fs->pwdmnt;
 109         fs->pwdmnt = mntget(mnt);
 110         fs->pwd = dget(dentry);
 111         UNLOCK_FS_STRUCT(fs);
 112
 113         if (old_pwd) {
 114                 dput(old_pwd);
 115                 mntput(old_pwdmnt);
 116         }
 117 }
 118 #endif
 119
 120 /*
 121  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 122  * ATTR_* attributes (see bug 13828)
 123  */
 124 #define ATTR_BLOCKS    (1 << 27)
 125
 126 #if HAVE_INODE_I_MUTEX
 127 #define UNLOCK_INODE_MUTEX(inode) \
 128 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 129 #define LOCK_INODE_MUTEX(inode) \
 130 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 131 #define LOCK_INODE_MUTEX_PARENT(inode) \
 132 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 133 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 134 #else
 135 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 136 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 137 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 138 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 139 #endif /* HAVE_INODE_I_MUTEX */
 140
 141 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 142 #define d_child d_u.d_child
 143 #define d_rcu d_u.d_rcu
 144 #endif
 145
 146 #ifdef HAVE_DQUOTOFF_MUTEX
 147 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 148 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 149 #else
 150 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 151 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 152 #endif /* HAVE_DQUOTOFF_MUTEX */
 153
 154 #define current_ngroups current_cred()->group_info->ngroups
 155 #define current_groups current_cred()->group_info->small_block
 156
 157 #ifndef page_private
 158 #define page_private(page) ((page)->private)
 159 #define set_page_private(page, v) ((page)->private = (v))
 160 #endif
 161
 162 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 163 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 164
 165 #define ll_kernel_locked()      kernel_locked()
 166
 167 /*
 168  * OBD need working random driver, thus all our
 169  * initialization routines must be called after device
 170  * driver initialization
 171  */
 172 #ifndef MODULE
 173 #undef module_init
 174 #define module_init(a)     late_initcall(a)
 175 #endif
 176
 177 /* XXX our code should be using the 2.6 calls, not the other way around */
 178 #ifdef HAVE_TRYLOCK_PAGE
 179 #define TestSetPageLocked(page)         (!trylock_page(page))
 180 #endif
 181
 182 #define Page_Uptodate(page)             PageUptodate(page)
 183 #define ll_redirty_page(page)           set_page_dirty(page)
 184
 185 #define KDEVT_INIT(val)                 (val)
 186
 187 #define LTIME_S(time)                   (time.tv_sec)
 188 #define ll_path_lookup                  path_lookup
 189
 190 #ifdef HAVE_EXPORT_INODE_PERMISSION
 191 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 192 #else
 193 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 194 #endif
 195
 196 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 197 #define ll_generic_permission(inode, mask, flags, check_acl) \
 198         generic_permission(inode, mask, flags, check_acl)
 199 #else
 200 #define ll_generic_permission(inode, mask, flags, check_acl) \
 201         generic_permission(inode, mask, check_acl)
 202 #endif
 203
 204 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 205 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 206 #define ll_call_writepage(inode, page)  \
 207                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 208 #define ll_invalidate_inode_pages(inode) \
 209                                 invalidate_inode_pages((inode)->i_mapping)
 210
 211 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 212 #define ll_dev_t                        dev_t
 213 #define kdev_t                          dev_t
 214 #define to_kdev_t(dev)                  (dev)
 215 #define kdev_t_to_nr(dev)               (dev)
 216 #define val_to_kdev(dev)                (dev)
 217
 218 #ifdef HAVE_BLKDEV_PUT_2ARGS
 219 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 220 #else
 221 #define ll_blkdev_put(a, b) blkdev_put(a)
 222 #endif
 223
 224 #ifdef HAVE_DENTRY_OPEN_4ARGS
 225 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 226 #else
 227 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 228 #endif
 229
 230 #include <linux/writeback.h>
 231
 232 static inline int cfs_cleanup_group_info(void)
 233 {
 234         struct group_info *ginfo;
 235
 236         ginfo = groups_alloc(0);
 237         if (!ginfo)
 238                 return -ENOMEM;
 239
 240         set_current_groups(ginfo);
 241         put_group_info(ginfo);
 242
 243         return 0;
 244 }
 245
 246 #define __set_page_ll_data(page, llap) \
 247         do {       \
 248                 page_cache_get(page); \
 249                 SetPagePrivate(page); \
 250                 set_page_private(page, (unsigned long)llap); \
 251         } while (0)
 252 #define __clear_page_ll_data(page) \
 253         do {       \
 254                 ClearPagePrivate(page); \
 255                 set_page_private(page, 0); \
 256                 page_cache_release(page); \
 257         } while(0)
 258
 259 #define kiobuf bio
 260
 261 #include <linux/proc_fs.h>
 262
 263 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 264 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 265 extern void __d_rehash(struct dentry *dentry, int lock);
 266 #endif
 267
 268 #ifdef HAVE_CAN_SLEEP_ARG
 269 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 270         flock_lock_file_wait(file, lock, can_sleep)
 271 #else
 272 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 273         flock_lock_file_wait(file, lock)
 274 #endif
 275
 276 #define CheckWriteback(page, cmd) \
 277         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 278          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 279
 280 #ifdef HAVE_PAGE_LIST
 281 static inline int mapping_has_pages(struct address_space *mapping)
 282 {
 283         int rc = 1;
 284
 285         ll_pgcache_lock(mapping);
 286         if (cfs_list_empty(&mapping->dirty_pages) &&
 287             cfs_list_empty(&mapping->clean_pages) &&
 288             cfs_list_empty(&mapping->locked_pages)) {
 289                 rc = 0;
 290         }
 291         ll_pgcache_unlock(mapping);
 292
 293         return rc;
 294 }
 295 #else
 296 static inline int mapping_has_pages(struct address_space *mapping)
 297 {
 298         return mapping->nrpages > 0;
 299 }
 300 #endif
 301
 302 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 303 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 304 #else
 305 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 306 #endif
 307
 308 #ifdef HAVE_SECURITY_PLUG
 309 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 310                 vfs_symlink(dir, dentry, mnt, path, mode)
 311 #else
 312 #ifdef HAVE_4ARGS_VFS_SYMLINK
 313 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 314                 vfs_symlink(dir, dentry, path, mode)
 315 #else
 316 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 317                        vfs_symlink(dir, dentry, path)
 318 #endif
 319
 320 #define ll_set_dflags(dentry, flags) do { \
 321                 cfs_spin_lock(&dentry->d_lock); \
 322                 dentry->d_flags |= flags; \
 323                 cfs_spin_unlock(&dentry->d_lock); \
 324         } while(0)
 325 #endif
 326
 327 #ifndef container_of
 328 #define container_of(ptr, type, member) ({                      \
 329                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 330                 (type *)( (char *)__mptr - offsetof(type,member) );})
 331 #endif
 332
 333 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 334 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 335 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 336
 337 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 338 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 339 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 340
 341 #include <linux/mpage.h>        /* for generic_writepages */
 342
 343 #ifndef HAVE_ATOMIC_MNT_COUNT
 344 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 345 {
 346 #ifdef CONFIG_SMP
 347         unsigned int count = 0;
 348         int cpu;
 349
 350         for_each_possible_cpu(cpu) {
 351                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 352         }
 353
 354         return count;
 355 #else
 356         return mnt->mnt_count;
 357 #endif
 358 }
 359 #else
 360 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 361 #endif
 362
 363 #ifdef HAVE_STATFS_DENTRY_PARAM
 364 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 365 #else
 366 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 367 #endif
 368
 369 #ifndef HAVE_SB_TIME_GRAN
 370 #ifndef HAVE_S_TIME_GRAN
 371 #error Need s_time_gran patch!
 372 #endif
 373 static inline u32 get_sb_time_gran(struct super_block *sb)
 374 {
 375         return sb->s_time_gran;
 376 }
 377 #endif
 378
 379 #ifdef HAVE_RW_TREE_LOCK
 380 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 381 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 382 #else
 383 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 384 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 385 #endif
 386
 387 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 388 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 389 #else
 390 static inline
 391 int ll_unregister_blkdev(unsigned int dev, const char *name)
 392 {
 393         unregister_blkdev(dev, name);
 394         return 0;
 395 }
 396 #endif
 397
 398 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 399 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 400 #else
 401 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 402 #endif
 403
 404 #ifdef HAVE_INODE_BLKSIZE
 405 #define ll_inode_blksize(a)     (a)->i_blksize
 406 #else
 407 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 408 #endif
 409
 410 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 411 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 412 #else
 413 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 414 #endif
 415
 416 #ifndef HAVE_D_OBTAIN_ALIAS
 417 /* The old d_alloc_anon() didn't free the inode reference on error
 418  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 419 static inline struct dentry *d_obtain_alias(struct inode *inode)
 420 {
 421         struct dentry *anon = d_alloc_anon(inode);
 422
 423         if (anon == NULL) {
 424                 iput(inode);
 425                 anon = ERR_PTR(-ENOMEM);
 426         }
 427
 428         return anon;
 429 }
 430 #endif
 431
 432 /* add a lustre compatible layer for crypto API */
 433 #include <linux/crypto.h>
 434 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 435 #define ll_crypto_hash          crypto_hash
 436 #define ll_crypto_cipher        crypto_blkcipher
 437 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 438 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 439 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 440 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 441 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 442 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 443                 crypto_alloc_blkcipher(name ,type, mask)
 444 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 445                 crypto_blkcipher_setkey(tfm, key, keylen)
 446 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 447                 crypto_blkcipher_set_iv(tfm, src, len)
 448 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 449                 crypto_blkcipher_get_iv(tfm, dst, len)
 450 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 451                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 452 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 453                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 454 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 455                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 456 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 457                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 458
 459 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 460                                  u8 *key, unsigned int *keylen,
 461                                  struct scatterlist *sg,
 462                                  unsigned int size, u8 *result)
 463 {
 464         struct hash_desc desc;
 465         int              rv;
 466         desc.tfm   = tfm;
 467         desc.flags = 0;
 468         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 469         if (rv) {
 470                 CERROR("failed to hash setkey: %d\n", rv);
 471                 return rv;
 472         }
 473         return crypto_hash_digest(&desc, sg, size, result);
 474 }
 475 static inline
 476 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 477 {
 478         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 479 }
 480 static inline
 481 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 482 {
 483         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 484 }
 485
 486 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 487 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 488 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 489 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 490 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 491 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 492 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 493 #include <linux/scatterlist.h>
 494 #define ll_crypto_hash          crypto_tfm
 495 #define ll_crypto_cipher        crypto_tfm
 496 #ifndef HAVE_STRUCT_HASH_DESC
 497 struct hash_desc {
 498         struct ll_crypto_hash *tfm;
 499         u32                    flags;
 500 };
 501 #endif
 502 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 503 struct blkcipher_desc {
 504         struct ll_crypto_cipher *tfm;
 505         void                    *info;
 506         u32                      flags;
 507 };
 508 #endif
 509 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 510         crypto_cipher_setkey(tfm, key, keylen)
 511 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 512         crypto_cipher_set_iv(tfm, src, len)
 513 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 514         crypto_cipher_get_iv(tfm, dst, len)
 515 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 516         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 517 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 518         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 519 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 520         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 521 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 522         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 523
 524 static inline
 525 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 526                                                    u32 type, u32 mask)
 527 {
 528         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 529         const char *pan = algname;
 530         u32         flag = 0;
 531
 532         if (strncmp("cbc(", algname, 4) == 0)
 533                 flag |= CRYPTO_TFM_MODE_CBC;
 534         else if (strncmp("ecb(", algname, 4) == 0)
 535                 flag |= CRYPTO_TFM_MODE_ECB;
 536         if (flag) {
 537                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 538                 if (vp) {
 539                         memcpy(buf, algname + 4, vp - algname - 4);
 540                         buf[vp - algname - 4] = '\0';
 541                         pan = buf;
 542                 } else {
 543                         flag = 0;
 544                 }
 545         }
 546         return crypto_alloc_tfm(pan, flag);
 547 }
 548
 549 static inline
 550 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 551 {
 552         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 553         const char *pan = alg;
 554
 555         if (strncmp("hmac(", alg, 5) == 0) {
 556                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 557                 if (vp) {
 558                         memcpy(buf, alg+ 5, vp - alg- 5);
 559                         buf[vp - alg - 5] = 0x00;
 560                         pan = buf;
 561                 }
 562         }
 563         return crypto_alloc_tfm(pan, 0);
 564 }
 565 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 566 {
 567        crypto_digest_init(desc->tfm); return 0;
 568 }
 569 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 570                                         struct scatterlist *sg,
 571                                         unsigned int nbytes)
 572 {
 573         struct scatterlist *sl = sg;
 574         unsigned int        count;
 575                 /*
 576                  * This way is very weakness. We must ensure that
 577                  * the sum of sg[0..i]->length isn't greater than nbytes.
 578                  * In the upstream kernel the crypto_hash_update() also
 579                  * via the nbytes computed the count of sg[...].
 580                  * The old style is more safely. but it gone.
 581                  */
 582         for (count = 0; nbytes > 0; count ++, sl ++) {
 583                 nbytes -= sl->length;
 584         }
 585         crypto_digest_update(desc->tfm, sg, count); return 0;
 586 }
 587 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 588 {
 589         crypto_digest_final(desc->tfm, out); return 0;
 590 }
 591 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 592                                  u8 *key, unsigned int *keylen,
 593                                  struct scatterlist *sg,
 594                                  unsigned int nbytes,
 595                                  u8 *out)
 596 {
 597         struct scatterlist *sl = sg;
 598         int                 count;
 599         for (count = 0; nbytes > 0; count ++, sl ++) {
 600                 nbytes -= sl->length;
 601         }
 602         crypto_hmac(tfm, key, keylen, sg, count, out);
 603         return 0;
 604 }
 605
 606 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 607 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 608 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 609 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 610 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 611 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 612 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 613 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 614 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 615 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 616
 617 #ifdef HAVE_FILE_REMOVE_SUID
 618 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 619 #else
 620 # ifdef HAVE_SECURITY_PLUG
 621 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 622 # else
 623 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 624 # endif
 625 #endif
 626
 627 #ifdef HAVE_SECURITY_PLUG
 628 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 629 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 630 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 631 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 632 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 633                 vfs_mknod(dir,entry,mnt,mode,dev)
 634 #define ll_security_inode_unlink(dir,entry,mnt)         \
 635                 security_inode_unlink(dir,entry,mnt)
 636 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 637                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 638 #else
 639 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 640 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 641 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 642 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 643 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 644 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 645 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 646                 vfs_rename(old,old_dir,new,new_dir)
 647 #endif /* HAVE_SECURITY_PLUG */
 648
 649 #ifdef for_each_possible_cpu
 650 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 651 #elif defined(for_each_cpu)
 652 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 653 #endif
 654
 655 #ifdef HAVE_BIO_ENDIO_2ARG
 656 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 657 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 658 #else
 659 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 660 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 661 #endif
 662
 663 #ifdef HAVE_FS_STRUCT_USE_PATH
 664 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 665 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 666 #define cfs_path_put(nd)     path_put(&(nd)->path)
 667 #else
 668 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 669 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 670 #define cfs_path_put(nd)     path_release(nd)
 671 #endif
 672
 673 #ifndef abs
 674 static inline int abs(int x)
 675 {
 676         return (x < 0) ? -x : x;
 677 }
 678 #endif
 679
 680 #ifndef labs
 681 static inline long labs(long x)
 682 {
 683         return (x < 0) ? -x : x;
 684 }
 685 #endif /* HAVE_REGISTER_SHRINKER */
 686
 687 #ifdef HAVE_INVALIDATE_INODE_PAGES
 688 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 689 #endif
 690
 691 #ifdef HAVE_INODE_IPRIVATE
 692 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 693 #else
 694 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 695 #endif
 696
 697 #ifndef HAVE_SIMPLE_SETATTR
 698 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 699 #endif
 700
 701 #ifndef SLAB_DESTROY_BY_RCU
 702 #define CFS_SLAB_DESTROY_BY_RCU 0
 703 #else
 704 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 705 #endif
 706
 707 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 708 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 709 #else
 710 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 711 #endif
 712
 713 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 714 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 715 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 716 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 717 #else
 718 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 719 #endif
 720
 721 static inline int
 722 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 723 {
 724         int rc;
 725
 726         if (sb->s_qcop->quota_on) {
 727 #ifdef HAVE_QUOTA_ON_USE_PATH
 728                 struct path path;
 729
 730                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 731                 if (!rc)
 732                         return rc;
 733 #endif
 734                 rc = sb->s_qcop->quota_on(sb, off, ver
 735 #ifdef HAVE_QUOTA_ON_USE_PATH
 736                                             , &path
 737 #else
 738                                             , name
 739 #endif
 740 #ifdef HAVE_QUOTA_ON_5ARGS
 741                                             , remount
 742 #endif
 743                                            );
 744 #ifdef HAVE_QUOTA_ON_USE_PATH
 745                 path_put(&path);
 746 #endif
 747                 return rc;
 748         }
 749         else
 750                 return -ENOSYS;
 751 }
 752
 753 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 754 {
 755         if (sb->s_qcop->quota_off) {
 756                 return sb->s_qcop->quota_off(sb, off
 757 #ifdef HAVE_QUOTA_OFF_3ARGS
 758                                              , remount
 759 #endif
 760                                             );
 761         }
 762         else
 763                 return -ENOSYS;
 764 }
 765
 766 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 767 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 768 #endif
 769
 770 #ifndef HAVE_VFS_DQ_OFF
 771 # define ll_vfs_dq_init             DQUOT_INIT
 772 # define ll_vfs_dq_drop             DQUOT_DROP
 773 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 774 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 775 #else
 776 # define ll_vfs_dq_init             vfs_dq_init
 777 # define ll_vfs_dq_drop             vfs_dq_drop
 778 # define ll_vfs_dq_transfer         vfs_dq_transfer
 779 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 780 #endif
 781
 782 #ifdef HAVE_BDI_INIT
 783 #define ll_bdi_init(bdi)    bdi_init(bdi)
 784 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 785 #else
 786 #define ll_bdi_init(bdi)    0
 787 #define ll_bdi_destroy(bdi) do { } while(0)
 788 #endif
 789
 790 #ifdef HAVE_NEW_BACKING_DEV_INFO
 791 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 792 #else
 793 # define ll_bdi_wb_cnt(bdi) 1
 794 #endif
 795
 796 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 797 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 798 #endif
 799
 800 #ifndef HAVE_BLKDEV_GET_BY_DEV
 801 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 802 #endif
 803
 804 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 805 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 806 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 807 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 808 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 809 #endif
 810
 811 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 812 #define blk_queue_max_segments(rq, seg)                      \
 813         do { blk_queue_max_phys_segments(rq, seg);           \
 814              blk_queue_max_hw_segments(rq, seg); } while (0)
 815 #else
 816 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 817 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 818 #endif
 819
 820
 821 #ifndef HAVE_BI_HW_SEGMENTS
 822 #define bio_hw_segments(q, bio) 0
 823 #endif
 824
 825 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 826 #define pagevec_lru_add_file pagevec_lru_add
 827 #endif
 828
 829 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 830 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 831         add_to_page_cache_lru(pg, mapping, off, gfp)
 832 #define ll_pagevec_init(pv, cold)       do {} while (0)
 833 #define ll_pagevec_add(pv, pg)          (0)
 834 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 835 #else
 836 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 837         add_to_page_cache(pg, mapping, off, gfp)
 838 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 839 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 840 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 841 #endif
 842
 843 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 844 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 845 #define HAVE_NODE_TO_CPUMASK
 846 #endif
 847
 848 #ifndef QUOTA_OK
 849 # define QUOTA_OK 0
 850 #endif
 851 #ifndef NO_QUOTA
 852 # define NO_QUOTA (-EDQUOT)
 853 #endif
 854
 855 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 856 # define ext2_set_bit             __test_and_set_bit_le
 857 # define ext2_clear_bit           __test_and_clear_bit_le
 858 # define ext2_test_bit            test_bit_le
 859 # define ext2_find_first_zero_bit find_first_zero_bit_le
 860 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 861 #endif
 862
 863 #ifdef ATTR_TIMES_SET
 864 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 865 #else
 866 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 867 #endif
 868
 869 #endif /* __KERNEL__ */
 870 #endif /* _COMPAT25_H */