lustre/include/linux/lustre_compat25.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef _LINUX_COMPAT25_H
  38 #define _LINUX_COMPAT25_H
  39
  40 #ifdef __KERNEL__
  41
  42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  43 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  44 #endif
  45
  46 #include <libcfs/linux/portals_compat25.h>
  47
  48 #include <linux/lustre_patchless_compat.h>
  49
  50 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  51 struct ll_iattr {
  52         struct iattr    iattr;
  53         unsigned int    ia_attr_flags;
  54 };
  55 #else
  56 #define ll_iattr iattr
  57 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  58
  59 #ifdef HAVE_FS_STRUCT_USE_PATH
  60 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  61                                  struct dentry *dentry)
  62 {
  63         struct path path;
  64         struct path old_pwd;
  65
  66         path.mnt = mnt;
  67         path.dentry = dentry;
  68         write_lock(&fs->lock);
  69         old_pwd = fs->pwd;
  70         path_get(&path);
  71         fs->pwd = path;
  72         write_unlock(&fs->lock);
  73
  74         if (old_pwd.dentry)
  75                 path_put(&old_pwd);
  76 }
  77
  78 #else
  79
  80 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  81                 struct dentry *dentry)
  82 {
  83         struct dentry *old_pwd;
  84         struct vfsmount *old_pwdmnt;
  85
  86         write_lock(&fs->lock);
  87         old_pwd = fs->pwd;
  88         old_pwdmnt = fs->pwdmnt;
  89         fs->pwdmnt = mntget(mnt);
  90         fs->pwd = dget(dentry);
  91         write_unlock(&fs->lock);
  92
  93         if (old_pwd) {
  94                 dput(old_pwd);
  95                 mntput(old_pwdmnt);
  96         }
  97 }
  98 #endif
  99
 100 /*
 101  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 102  * ATTR_* attributes (see bug 13828)
 103  */
 104 #define ATTR_BLOCKS    (1 << 27)
 105
 106 #if HAVE_INODE_I_MUTEX
 107 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
 108 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
 109 #define LOCK_INODE_MUTEX_PARENT(inode) \
 110 do {mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 111 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
 112 #else
 113 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
 114 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
 115 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 116 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 117 #endif /* HAVE_INODE_I_MUTEX */
 118
 119 #ifdef HAVE_SEQ_LOCK
 120 #define LL_SEQ_LOCK(seq) mutex_lock(&(seq)->lock)
 121 #define LL_SEQ_UNLOCK(seq) mutex_unlock(&(seq)->lock)
 122 #else
 123 #define LL_SEQ_LOCK(seq) down(&(seq)->sem)
 124 #define LL_SEQ_UNLOCK(seq) up(&(seq)->sem)
 125 #endif
 126
 127 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 128 #define d_child d_u.d_child
 129 #define d_rcu d_u.d_rcu
 130 #endif
 131
 132 #ifdef HAVE_DQUOTOFF_MUTEX
 133 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
 134 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
 135 #else
 136 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
 137 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
 138 #endif /* HAVE_DQUOTOFF_MUTEX */
 139
 140 #define current_ngroups current->group_info->ngroups
 141 #define current_groups current->group_info->small_block
 142
 143 #ifndef page_private
 144 #define page_private(page) ((page)->private)
 145 #define set_page_private(page, v) ((page)->private = (v))
 146 #endif
 147
 148 #ifndef HAVE_GFP_T
 149 #define gfp_t int
 150 #endif
 151
 152 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 153 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 154
 155 #define ll_kernel_locked()      kernel_locked()
 156
 157 /*
 158  * OBD need working random driver, thus all our
 159  * initialization routines must be called after device
 160  * driver initialization
 161  */
 162 #ifndef MODULE
 163 #undef module_init
 164 #define module_init(a)     late_initcall(a)
 165 #endif
 166
 167 /* XXX our code should be using the 2.6 calls, not the other way around */
 168 #ifdef HAVE_TRYLOCK_PAGE
 169 #define TestSetPageLocked(page)         (!trylock_page(page))
 170 #endif
 171
 172 #define Page_Uptodate(page)             PageUptodate(page)
 173 #define ll_redirty_page(page)           set_page_dirty(page)
 174
 175 #define KDEVT_INIT(val)                 (val)
 176
 177 #define LTIME_S(time)                   (time.tv_sec)
 178 #define ll_path_lookup                  path_lookup
 179 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 180
 181 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 182 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 183 #define ll_call_writepage(inode, page)  \
 184                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 185 #define ll_invalidate_inode_pages(inode) \
 186                                 invalidate_inode_pages((inode)->i_mapping)
 187 #define ll_truncate_complete_page(page) \
 188                                 truncate_complete_page(page->mapping, page)
 189
 190 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 191 #define ll_dev_t                        dev_t
 192 #define kdev_t                          dev_t
 193 #define to_kdev_t(dev)                  (dev)
 194 #define kdev_t_to_nr(dev)               (dev)
 195 #define val_to_kdev(dev)                (dev)
 196 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, (void *)(data));
 197
 198 #include <linux/writeback.h>
 199
 200 static inline int cleanup_group_info(void)
 201 {
 202         struct group_info *ginfo;
 203
 204         ginfo = groups_alloc(0);
 205         if (!ginfo)
 206                 return -ENOMEM;
 207
 208         set_current_groups(ginfo);
 209         put_group_info(ginfo);
 210
 211         return 0;
 212 }
 213
 214 #define __set_page_ll_data(page, llap) \
 215         do {       \
 216                 page_cache_get(page); \
 217                 SetPagePrivate(page); \
 218                 set_page_private(page, (unsigned long)llap); \
 219         } while (0)
 220 #define __clear_page_ll_data(page) \
 221         do {       \
 222                 ClearPagePrivate(page); \
 223                 set_page_private(page, 0); \
 224                 page_cache_release(page); \
 225         } while(0)
 226
 227 #define kiobuf bio
 228
 229 #include <linux/proc_fs.h>
 230
 231 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 232 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 233 extern void __d_rehash(struct dentry *dentry, int lock);
 234 #endif
 235
 236 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 237 #define d_move_locked(dentry, target) __d_move(dentry, target)
 238 extern void __d_move(struct dentry *dentry, struct dentry *target);
 239 #endif
 240
 241 #ifdef HAVE_CAN_SLEEP_ARG
 242 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 243         flock_lock_file_wait(file, lock, can_sleep)
 244 #else
 245 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 246         flock_lock_file_wait(file, lock)
 247 #endif
 248
 249 #define CheckWriteback(page, cmd) \
 250         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 251          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 252
 253 #ifdef HAVE_PAGE_LIST
 254 static inline int mapping_has_pages(struct address_space *mapping)
 255 {
 256         int rc = 1;
 257
 258         ll_pgcache_lock(mapping);
 259         if (list_empty(&mapping->dirty_pages) &&
 260             list_empty(&mapping->clean_pages) &&
 261             list_empty(&mapping->locked_pages)) {
 262                 rc = 0;
 263         }
 264         ll_pgcache_unlock(mapping);
 265
 266         return rc;
 267 }
 268 #else
 269 static inline int mapping_has_pages(struct address_space *mapping)
 270 {
 271         return mapping->nrpages > 0;
 272 }
 273 #endif
 274
 275 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 276 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 277 #else
 278 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 279 #endif
 280
 281 #ifdef HAVE_SECURITY_PLUG
 282 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 283                 vfs_symlink(dir, dentry, mnt, path, mode)
 284 #else
 285 #ifdef HAVE_4ARGS_VFS_SYMLINK
 286 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 287                 vfs_symlink(dir, dentry, path, mode)
 288 #else
 289 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 290                        vfs_symlink(dir, dentry, path)
 291 #endif
 292 #endif
 293
 294 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 295 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 296 #else
 297 #define ll_set_dflags(dentry, flags) do { \
 298                 spin_lock(&dentry->d_lock); \
 299                 dentry->d_flags |= flags; \
 300                 spin_unlock(&dentry->d_lock); \
 301         } while(0)
 302 #endif
 303
 304 #ifndef container_of
 305 #define container_of(ptr, type, member) ({                      \
 306                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 307                 (type *)( (char *)__mptr - offsetof(type,member) );})
 308 #endif
 309
 310 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 311 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 312 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 313
 314 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 315 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 316 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 317
 318 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 319 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 320 #endif
 321
 322 #include <linux/mpage.h>        /* for generic_writepages */
 323 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 324 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 325 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 326                                            loff_t start, loff_t end)
 327 {
 328         int rc;
 329         struct writeback_control wbc = {
 330                 .sync_mode = WB_SYNC_ALL,
 331                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 332         };
 333
 334 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 335         wbc.range_start = start;
 336         wbc.range_end = end;
 337 #else
 338         wbc.start = start;
 339         wbc.end = end;
 340 #endif
 341
 342 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 343         if (!mapping_cap_writeback_dirty(mapping))
 344                 rc = 0;
 345 #else
 346         if (mapping->backing_dev_info->memory_backed)
 347                 rc = 0;
 348 #endif
 349         /* do_writepages() */
 350         else if (mapping->a_ops->writepages)
 351                 rc = mapping->a_ops->writepages(mapping, &wbc);
 352         else
 353                 rc = generic_writepages(mapping, &wbc);
 354         return rc;
 355 }
 356 #else
 357 int filemap_fdatawrite_range(struct address_space *mapping,
 358                              loff_t start, loff_t end);
 359 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 360
 361 #ifdef HAVE_VFS_KERN_MOUNT
 362 static inline struct vfsmount *
 363 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 364 {
 365         struct file_system_type *type = get_fs_type(fstype);
 366         struct vfsmount *mnt;
 367         if (!type)
 368                 return ERR_PTR(-ENODEV);
 369         mnt = vfs_kern_mount(type, flags, name, data);
 370         module_put(type->owner);
 371         return mnt;
 372 }
 373 #else
 374 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 375 #endif
 376
 377 #ifdef HAVE_STATFS_DENTRY_PARAM
 378 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 379 #else
 380 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 381 #endif
 382
 383 #ifndef HAVE_SB_TIME_GRAN
 384 #ifndef HAVE_S_TIME_GRAN
 385 #error Need s_time_gran patch!
 386 #endif
 387 static inline u32 get_sb_time_gran(struct super_block *sb)
 388 {
 389         return sb->s_time_gran;
 390 }
 391 #endif
 392
 393 #ifdef HAVE_RW_TREE_LOCK
 394 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 395 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 396 #else
 397 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
 398 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
 399 #endif
 400
 401 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 402 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 403 #else
 404 static inline
 405 int ll_unregister_blkdev(unsigned int dev, const char *name)
 406 {
 407         unregister_blkdev(dev, name);
 408         return 0;
 409 }
 410 #endif
 411
 412 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 413 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 414 #else
 415 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 416 #endif
 417
 418 #ifdef HAVE_INODE_BLKSIZE
 419 #define ll_inode_blksize(a)     (a)->i_blksize
 420 #else
 421 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 422 #endif
 423
 424 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 425 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 426 #else
 427 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 428 #endif
 429
 430 /* add a lustre compatible layer for crypto API */
 431 #include <linux/crypto.h>
 432 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 433 #define ll_crypto_hash          crypto_hash
 434 #define ll_crypto_cipher        crypto_blkcipher
 435 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 436 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 437 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 438 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 439 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 440 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 441                 crypto_alloc_blkcipher(name ,type, mask)
 442 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 443                 crypto_blkcipher_setkey(tfm, key, keylen)
 444 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 445                 crypto_blkcipher_set_iv(tfm, src, len)
 446 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 447                 crypto_blkcipher_get_iv(tfm, dst, len)
 448 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 449                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 450 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 451                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 452 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 453                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 454 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 455                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 456
 457 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 458                                  u8 *key, unsigned int *keylen,
 459                                  struct scatterlist *sg,
 460                                  unsigned int size, u8 *result)
 461 {
 462         struct hash_desc desc;
 463         int              rv;
 464         desc.tfm   = tfm;
 465         desc.flags = 0;
 466         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 467         if (rv) {
 468                 CERROR("failed to hash setkey: %d\n", rv);
 469                 return rv;
 470         }
 471         return crypto_hash_digest(&desc, sg, size, result);
 472 }
 473 static inline
 474 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 475 {
 476         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 477 }
 478 static inline
 479 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 480 {
 481         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 482 }
 483
 484 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 485 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 486 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 487 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 488 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 489 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 490 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 491 #include <linux/scatterlist.h>
 492 #define ll_crypto_hash          crypto_tfm
 493 #define ll_crypto_cipher        crypto_tfm
 494 #ifndef HAVE_STRUCT_HASH_DESC
 495 struct hash_desc {
 496         struct ll_crypto_hash *tfm;
 497         u32                    flags;
 498 };
 499 #endif
 500 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 501 struct blkcipher_desc {
 502         struct ll_crypto_cipher *tfm;
 503         void                    *info;
 504         u32                      flags;
 505 };
 506 #endif
 507 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 508         crypto_cipher_setkey(tfm, key, keylen)
 509 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 510         crypto_cipher_set_iv(tfm, src, len)
 511 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 512         crypto_cipher_get_iv(tfm, dst, len)
 513 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 514         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 515 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 516         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 517 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 518         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 519 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 520         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 521
 522 static inline
 523 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 524                                                    u32 type, u32 mask)
 525 {
 526         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 527         const char *pan = algname;
 528         u32         flag = 0;
 529
 530         if (strncmp("cbc(", algname, 4) == 0)
 531                 flag |= CRYPTO_TFM_MODE_CBC;
 532         else if (strncmp("ecb(", algname, 4) == 0)
 533                 flag |= CRYPTO_TFM_MODE_ECB;
 534         if (flag) {
 535                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 536                 if (vp) {
 537                         memcpy(buf, algname + 4, vp - algname - 4);
 538                         buf[vp - algname - 4] = '\0';
 539                         pan = buf;
 540                 } else {
 541                         flag = 0;
 542                 }
 543         }
 544         return crypto_alloc_tfm(pan, flag);
 545 }
 546
 547 static inline
 548 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 549 {
 550         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 551         const char *pan = alg;
 552
 553         if (strncmp("hmac(", alg, 5) == 0) {
 554                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 555                 if (vp) {
 556                         memcpy(buf, alg+ 5, vp - alg- 5);
 557                         buf[vp - alg - 5] = 0x00;
 558                         pan = buf;
 559                 }
 560         }
 561         return crypto_alloc_tfm(pan, 0);
 562 }
 563 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 564 {
 565        crypto_digest_init(desc->tfm); return 0;
 566 }
 567 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 568                                         struct scatterlist *sg,
 569                                         unsigned int nbytes)
 570 {
 571         struct scatterlist *sl = sg;
 572         unsigned int        count;
 573                 /*
 574                  * This way is very weakness. We must ensure that
 575                  * the sum of sg[0..i]->length isn't greater than nbytes.
 576                  * In the upstream kernel the crypto_hash_update() also
 577                  * via the nbytes computed the count of sg[...].
 578                  * The old style is more safely. but it gone.
 579                  */
 580         for (count = 0; nbytes > 0; count ++, sl ++) {
 581                 nbytes -= sl->length;
 582         }
 583         crypto_digest_update(desc->tfm, sg, count); return 0;
 584 }
 585 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 586 {
 587         crypto_digest_final(desc->tfm, out); return 0;
 588 }
 589 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 590                                  u8 *key, unsigned int *keylen,
 591                                  struct scatterlist *sg,
 592                                  unsigned int nbytes,
 593                                  u8 *out)
 594 {
 595         struct scatterlist *sl = sg;
 596         int                 count;
 597         for (count = 0; nbytes > 0; count ++, sl ++) {
 598                 nbytes -= sl->length;
 599         }
 600         crypto_hmac(tfm, key, keylen, sg, count, out);
 601         return 0;
 602 }
 603
 604 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 605 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 606 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 607 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 608 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 609 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 610 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 611 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 612 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 613 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 614
 615 #ifndef HAVE_SYNCHRONIZE_RCU
 616 #define synchronize_rcu() synchronize_kernel()
 617 #endif
 618
 619 #ifdef HAVE_FILE_REMOVE_SUID
 620 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 621 #else
 622 # ifdef HAVE_SECURITY_PLUG
 623 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 624 # else
 625 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 626 # endif
 627 #endif
 628
 629 #ifdef HAVE_SECURITY_PLUG
 630 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 631 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 632 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 633 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 634 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 635                 vfs_mknod(dir,entry,mnt,mode,dev)
 636 #define ll_security_inode_unlink(dir,entry,mnt)         \
 637                 security_inode_unlink(dir,entry,mnt)
 638 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 639                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 640 #else
 641 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 642 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 643 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 644 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 645 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 646 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 647 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 648                 vfs_rename(old,old_dir,new,new_dir)
 649 #endif /* HAVE_SECURITY_PLUG */
 650
 651 #ifndef for_each_possible_cpu
 652 #define for_each_possible_cpu(i) for_each_cpu(i)
 653 #endif
 654
 655 #ifndef cpu_to_node
 656 #define cpu_to_node(cpu)         0
 657 #endif
 658
 659 #ifdef HAVE_REGISTER_SHRINKER
 660 typedef int (*shrinker_t)(int nr_to_scan, gfp_t gfp_mask);
 661
 662 static inline
 663 struct shrinker *set_shrinker(int seek, shrinker_t func)
 664 {
 665         struct shrinker *s;
 666
 667         s = kmalloc(sizeof(*s), GFP_KERNEL);
 668         if (s == NULL)
 669                 return (NULL);
 670
 671         s->shrink = func;
 672         s->seeks = seek;
 673
 674         register_shrinker(s);
 675
 676         return s;
 677 }
 678
 679 static inline
 680 void remove_shrinker(struct shrinker *shrinker)
 681 {
 682         if (shrinker == NULL)
 683                 return;
 684
 685         unregister_shrinker(shrinker);
 686         kfree(shrinker);
 687 }
 688 #endif
 689
 690 #ifdef HAVE_BIO_ENDIO_2ARG
 691 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 692 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 693 #else
 694 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 695 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 696 #endif
 697
 698 #ifdef HAVE_FS_STRUCT_USE_PATH
 699 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 700 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 701 #define cfs_path_put(nd)     path_put(&(nd)->path)
 702 #else
 703 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 704 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 705 #define cfs_path_put(nd)     path_release(nd)
 706 #endif
 707
 708 #ifndef abs
 709 static inline int abs(int x)
 710 {
 711         return (x < 0) ? -x : x;
 712 }
 713 #endif
 714
 715 #ifndef labs
 716 static inline long labs(long x)
 717 {
 718         return (x < 0) ? -x : x;
 719 }
 720 #endif /* HAVE_REGISTER_SHRINKER */
 721
 722 /* Using kernel fls(). Userspace will use one defined in user-bitops.h. */
 723 #ifndef __fls
 724 #define __fls fls
 725 #endif
 726
 727 #ifdef HAVE_INVALIDATE_INODE_PAGES
 728 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 729 #endif
 730
 731 #ifdef HAVE_INODE_IPRIVATE
 732 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 733 #else
 734 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 735 #endif
 736
 737 #ifndef SLAB_DESTROY_BY_RCU
 738 #define SLAB_DESTROY_BY_RCU 0
 739 #endif
 740
 741 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 742 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 743 #else
 744 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 745 #endif
 746
 747 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 748 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 749 #else
 750 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 751 #endif
 752
 753 static inline int
 754 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 755 {
 756         if (sb->s_qcop->quota_on) {
 757                 return sb->s_qcop->quota_on(sb, off, ver, name
 758 #ifdef HAVE_QUOTA_ON_5ARGS
 759                                             , remount
 760 #endif
 761                                            );
 762         }
 763         else
 764                 return -ENOSYS;
 765 }
 766
 767 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 768 {
 769         if (sb->s_qcop->quota_off) {
 770                 return sb->s_qcop->quota_off(sb, off
 771 #ifdef HAVE_QUOTA_OFF_3ARGS
 772                                              , remount
 773 #endif
 774                                             );
 775         }
 776         else
 777                 return -ENOSYS;
 778 }
 779
 780
 781 #ifdef HAVE_VFS_RENAME_MUTEX
 782 #define VFS_RENAME_LOCK(inode) mutex_lock(&((inode)->i_sb->s_vfs_rename_mutex))
 783 #define VFS_RENAME_UNLOCK(inode) mutex_unlock(&((inode)->i_sb->s_vfs_rename_mutex))
 784 #else
 785 #define VFS_RENAME_LOCK(inode) down(&((inode)->i_sb->s_vfs_rename_sem))
 786 #define VFS_RENAME_UNLOCK(inode) up(&((inode)->i_sb->s_vfs_rename_sem))
 787 #endif
 788
 789 #endif /* __KERNEL__ */
 790 #endif /* _COMPAT25_H */