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
 183 #ifdef HAVE_EXPORT_INODE_PERMISSION
 184 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 185 #else
 186 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 187 #endif
 188
 189 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 190 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 191 #define ll_call_writepage(inode, page)  \
 192                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 193 #define ll_invalidate_inode_pages(inode) \
 194                                 invalidate_inode_pages((inode)->i_mapping)
 195 #define ll_truncate_complete_page(page) \
 196                                 truncate_complete_page(page->mapping, page)
 197
 198 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 199 #define ll_dev_t                        dev_t
 200 #define kdev_t                          dev_t
 201 #define to_kdev_t(dev)                  (dev)
 202 #define kdev_t_to_nr(dev)               (dev)
 203 #define val_to_kdev(dev)                (dev)
 204
 205 #ifdef HAVE_BLKDEV_PUT_2ARGS
 206 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 207 #else
 208 #define ll_blkdev_put(a, b) blkdev_put(a)
 209 #endif
 210
 211 #ifdef HAVE_DENTRY_OPEN_4ARGS
 212 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 213 #else
 214 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 215 #endif
 216
 217 #include <linux/writeback.h>
 218
 219 static inline int cfs_cleanup_group_info(void)
 220 {
 221         struct group_info *ginfo;
 222
 223         ginfo = groups_alloc(0);
 224         if (!ginfo)
 225                 return -ENOMEM;
 226
 227         set_current_groups(ginfo);
 228         put_group_info(ginfo);
 229
 230         return 0;
 231 }
 232
 233 #define __set_page_ll_data(page, llap) \
 234         do {       \
 235                 page_cache_get(page); \
 236                 SetPagePrivate(page); \
 237                 set_page_private(page, (unsigned long)llap); \
 238         } while (0)
 239 #define __clear_page_ll_data(page) \
 240         do {       \
 241                 ClearPagePrivate(page); \
 242                 set_page_private(page, 0); \
 243                 page_cache_release(page); \
 244         } while(0)
 245
 246 #define kiobuf bio
 247
 248 #include <linux/proc_fs.h>
 249
 250 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 251 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 252 extern void __d_rehash(struct dentry *dentry, int lock);
 253 #endif
 254
 255 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 256 #define d_move_locked(dentry, target) __d_move(dentry, target)
 257 extern void __d_move(struct dentry *dentry, struct dentry *target);
 258 #endif
 259
 260 #ifdef HAVE_CAN_SLEEP_ARG
 261 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 262         flock_lock_file_wait(file, lock, can_sleep)
 263 #else
 264 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 265         flock_lock_file_wait(file, lock)
 266 #endif
 267
 268 #define CheckWriteback(page, cmd) \
 269         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 270          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 271
 272 #ifdef HAVE_PAGE_LIST
 273 static inline int mapping_has_pages(struct address_space *mapping)
 274 {
 275         int rc = 1;
 276
 277         ll_pgcache_lock(mapping);
 278         if (cfs_list_empty(&mapping->dirty_pages) &&
 279             cfs_list_empty(&mapping->clean_pages) &&
 280             cfs_list_empty(&mapping->locked_pages)) {
 281                 rc = 0;
 282         }
 283         ll_pgcache_unlock(mapping);
 284
 285         return rc;
 286 }
 287 #else
 288 static inline int mapping_has_pages(struct address_space *mapping)
 289 {
 290         return mapping->nrpages > 0;
 291 }
 292 #endif
 293
 294 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 295 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 296 #else
 297 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 298 #endif
 299
 300 #ifdef HAVE_SECURITY_PLUG
 301 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 302                 vfs_symlink(dir, dentry, mnt, path, mode)
 303 #else
 304 #ifdef HAVE_4ARGS_VFS_SYMLINK
 305 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 306                 vfs_symlink(dir, dentry, path, mode)
 307 #else
 308 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 309                        vfs_symlink(dir, dentry, path)
 310 #endif
 311
 312 #define ll_set_dflags(dentry, flags) do { \
 313                 cfs_spin_lock(&dentry->d_lock); \
 314                 dentry->d_flags |= flags; \
 315                 cfs_spin_unlock(&dentry->d_lock); \
 316         } while(0)
 317 #endif
 318
 319 #ifndef container_of
 320 #define container_of(ptr, type, member) ({                      \
 321                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 322                 (type *)( (char *)__mptr - offsetof(type,member) );})
 323 #endif
 324
 325 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 326 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 327 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 328
 329 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 330 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 331 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 332
 333 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 334 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 335 #endif
 336
 337 #include <linux/mpage.h>        /* for generic_writepages */
 338 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 339 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 340 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 341                                            loff_t start, loff_t end)
 342 {
 343         int rc;
 344         struct writeback_control wbc = {
 345                 .sync_mode = WB_SYNC_ALL,
 346                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 347         };
 348
 349 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 350         wbc.range_start = start;
 351         wbc.range_end = end;
 352 #else
 353         wbc.start = start;
 354         wbc.end = end;
 355 #endif
 356
 357 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 358         if (!mapping_cap_writeback_dirty(mapping))
 359                 rc = 0;
 360 #else
 361         if (mapping->backing_dev_info->memory_backed)
 362                 rc = 0;
 363 #endif
 364         /* do_writepages() */
 365         else if (mapping->a_ops->writepages)
 366                 rc = mapping->a_ops->writepages(mapping, &wbc);
 367         else
 368                 rc = generic_writepages(mapping, &wbc);
 369         return rc;
 370 }
 371 #else
 372 int filemap_fdatawrite_range(struct address_space *mapping,
 373                              loff_t start, loff_t end);
 374 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 375
 376 #ifdef HAVE_VFS_KERN_MOUNT
 377 static inline struct vfsmount *
 378 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 379 {
 380         struct file_system_type *type = get_fs_type(fstype);
 381         struct vfsmount *mnt;
 382         if (!type)
 383                 return ERR_PTR(-ENODEV);
 384         mnt = vfs_kern_mount(type, flags, name, data);
 385         cfs_module_put(type->owner);
 386         return mnt;
 387 }
 388 #else
 389 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 390 #endif
 391
 392 #ifdef HAVE_STATFS_DENTRY_PARAM
 393 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 394 #else
 395 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 396 #endif
 397
 398 #ifndef HAVE_SB_TIME_GRAN
 399 #ifndef HAVE_S_TIME_GRAN
 400 #error Need s_time_gran patch!
 401 #endif
 402 static inline u32 get_sb_time_gran(struct super_block *sb)
 403 {
 404         return sb->s_time_gran;
 405 }
 406 #endif
 407
 408 #ifdef HAVE_RW_TREE_LOCK
 409 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 410 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 411 #else
 412 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 413 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 414 #endif
 415
 416 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 417 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 418 #else
 419 static inline
 420 int ll_unregister_blkdev(unsigned int dev, const char *name)
 421 {
 422         unregister_blkdev(dev, name);
 423         return 0;
 424 }
 425 #endif
 426
 427 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 428 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 429 #else
 430 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 431 #endif
 432
 433 #ifdef HAVE_INODE_BLKSIZE
 434 #define ll_inode_blksize(a)     (a)->i_blksize
 435 #else
 436 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 437 #endif
 438
 439 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 440 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 441 #else
 442 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 443 #endif
 444
 445 #ifndef HAVE_D_OBTAIN_ALIAS
 446 /* The old d_alloc_anon() didn't free the inode reference on error
 447  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 448 static inline struct dentry *d_obtain_alias(struct inode *inode)
 449 {
 450         struct dentry *anon = d_alloc_anon(inode);
 451
 452         if (anon == NULL)
 453                 iput(inode);
 454
 455         return anon;
 456 }
 457 #endif
 458
 459 /* add a lustre compatible layer for crypto API */
 460 #include <linux/crypto.h>
 461 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 462 #define ll_crypto_hash          crypto_hash
 463 #define ll_crypto_cipher        crypto_blkcipher
 464 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 465 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 466 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 467 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 468 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 469 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 470                 crypto_alloc_blkcipher(name ,type, mask)
 471 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 472                 crypto_blkcipher_setkey(tfm, key, keylen)
 473 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 474                 crypto_blkcipher_set_iv(tfm, src, len)
 475 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 476                 crypto_blkcipher_get_iv(tfm, dst, len)
 477 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 478                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 479 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 480                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 481 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 482                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 483 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 484                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 485
 486 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 487                                  u8 *key, unsigned int *keylen,
 488                                  struct scatterlist *sg,
 489                                  unsigned int size, u8 *result)
 490 {
 491         struct hash_desc desc;
 492         int              rv;
 493         desc.tfm   = tfm;
 494         desc.flags = 0;
 495         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 496         if (rv) {
 497                 CERROR("failed to hash setkey: %d\n", rv);
 498                 return rv;
 499         }
 500         return crypto_hash_digest(&desc, sg, size, result);
 501 }
 502 static inline
 503 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 504 {
 505         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 506 }
 507 static inline
 508 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 509 {
 510         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 511 }
 512
 513 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 514 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 515 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 516 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 517 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 518 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 519 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 520 #include <linux/scatterlist.h>
 521 #define ll_crypto_hash          crypto_tfm
 522 #define ll_crypto_cipher        crypto_tfm
 523 #ifndef HAVE_STRUCT_HASH_DESC
 524 struct hash_desc {
 525         struct ll_crypto_hash *tfm;
 526         u32                    flags;
 527 };
 528 #endif
 529 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 530 struct blkcipher_desc {
 531         struct ll_crypto_cipher *tfm;
 532         void                    *info;
 533         u32                      flags;
 534 };
 535 #endif
 536 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 537         crypto_cipher_setkey(tfm, key, keylen)
 538 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 539         crypto_cipher_set_iv(tfm, src, len)
 540 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 541         crypto_cipher_get_iv(tfm, dst, len)
 542 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 543         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 544 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 545         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 546 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 547         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 548 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 549         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 550
 551 static inline
 552 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 553                                                    u32 type, u32 mask)
 554 {
 555         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 556         const char *pan = algname;
 557         u32         flag = 0;
 558
 559         if (strncmp("cbc(", algname, 4) == 0)
 560                 flag |= CRYPTO_TFM_MODE_CBC;
 561         else if (strncmp("ecb(", algname, 4) == 0)
 562                 flag |= CRYPTO_TFM_MODE_ECB;
 563         if (flag) {
 564                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 565                 if (vp) {
 566                         memcpy(buf, algname + 4, vp - algname - 4);
 567                         buf[vp - algname - 4] = '\0';
 568                         pan = buf;
 569                 } else {
 570                         flag = 0;
 571                 }
 572         }
 573         return crypto_alloc_tfm(pan, flag);
 574 }
 575
 576 static inline
 577 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 578 {
 579         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 580         const char *pan = alg;
 581
 582         if (strncmp("hmac(", alg, 5) == 0) {
 583                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 584                 if (vp) {
 585                         memcpy(buf, alg+ 5, vp - alg- 5);
 586                         buf[vp - alg - 5] = 0x00;
 587                         pan = buf;
 588                 }
 589         }
 590         return crypto_alloc_tfm(pan, 0);
 591 }
 592 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 593 {
 594        crypto_digest_init(desc->tfm); return 0;
 595 }
 596 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 597                                         struct scatterlist *sg,
 598                                         unsigned int nbytes)
 599 {
 600         struct scatterlist *sl = sg;
 601         unsigned int        count;
 602                 /*
 603                  * This way is very weakness. We must ensure that
 604                  * the sum of sg[0..i]->length isn't greater than nbytes.
 605                  * In the upstream kernel the crypto_hash_update() also
 606                  * via the nbytes computed the count of sg[...].
 607                  * The old style is more safely. but it gone.
 608                  */
 609         for (count = 0; nbytes > 0; count ++, sl ++) {
 610                 nbytes -= sl->length;
 611         }
 612         crypto_digest_update(desc->tfm, sg, count); return 0;
 613 }
 614 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 615 {
 616         crypto_digest_final(desc->tfm, out); return 0;
 617 }
 618 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 619                                  u8 *key, unsigned int *keylen,
 620                                  struct scatterlist *sg,
 621                                  unsigned int nbytes,
 622                                  u8 *out)
 623 {
 624         struct scatterlist *sl = sg;
 625         int                 count;
 626         for (count = 0; nbytes > 0; count ++, sl ++) {
 627                 nbytes -= sl->length;
 628         }
 629         crypto_hmac(tfm, key, keylen, sg, count, out);
 630         return 0;
 631 }
 632
 633 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 634 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 635 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 636 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 637 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 638 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 639 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 640 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 641 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 642 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 643
 644 #ifndef HAVE_SYNCHRONIZE_RCU
 645 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 646 #ifndef synchronize_rcu
 647 #define synchronize_rcu() synchronize_kernel()
 648 #endif
 649 #endif
 650
 651 #ifdef HAVE_FILE_REMOVE_SUID
 652 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 653 #else
 654 # ifdef HAVE_SECURITY_PLUG
 655 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 656 # else
 657 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 658 # endif
 659 #endif
 660
 661 #ifdef HAVE_SECURITY_PLUG
 662 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 663 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 664 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 665 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 666 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 667                 vfs_mknod(dir,entry,mnt,mode,dev)
 668 #define ll_security_inode_unlink(dir,entry,mnt)         \
 669                 security_inode_unlink(dir,entry,mnt)
 670 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 671                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 672 #else
 673 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 674 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 675 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 676 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 677 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 678 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 679 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 680                 vfs_rename(old,old_dir,new,new_dir)
 681 #endif /* HAVE_SECURITY_PLUG */
 682
 683 #ifdef for_each_possible_cpu
 684 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 685 #elif defined(for_each_cpu)
 686 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 687 #endif
 688
 689 #ifndef cpu_to_node
 690 #define cpu_to_node(cpu)         0
 691 #endif
 692
 693 #ifdef HAVE_REGISTER_SHRINKER
 694 typedef int (*cfs_shrinker_t)(SHRINKER_FIRST_ARG int nr_to_scan, gfp_t gfp_mask);
 695
 696 static inline
 697 struct shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
 698 {
 699         struct shrinker *s;
 700
 701         s = kmalloc(sizeof(*s), GFP_KERNEL);
 702         if (s == NULL)
 703                 return (NULL);
 704
 705         s->shrink = func;
 706         s->seeks = seek;
 707
 708         register_shrinker(s);
 709
 710         return s;
 711 }
 712
 713 static inline
 714 void cfs_remove_shrinker(struct shrinker *shrinker)
 715 {
 716         if (shrinker == NULL)
 717                 return;
 718
 719         unregister_shrinker(shrinker);
 720         kfree(shrinker);
 721 }
 722 #endif
 723
 724 #ifdef HAVE_BIO_ENDIO_2ARG
 725 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 726 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 727 #else
 728 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 729 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 730 #endif
 731
 732 #ifdef HAVE_FS_STRUCT_USE_PATH
 733 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 734 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 735 #define cfs_path_put(nd)     path_put(&(nd)->path)
 736 #else
 737 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 738 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 739 #define cfs_path_put(nd)     path_release(nd)
 740 #endif
 741
 742 #ifndef abs
 743 static inline int abs(int x)
 744 {
 745         return (x < 0) ? -x : x;
 746 }
 747 #endif
 748
 749 #ifndef labs
 750 static inline long labs(long x)
 751 {
 752         return (x < 0) ? -x : x;
 753 }
 754 #endif /* HAVE_REGISTER_SHRINKER */
 755
 756 #ifdef HAVE_INVALIDATE_INODE_PAGES
 757 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 758 #endif
 759
 760 #ifdef HAVE_INODE_IPRIVATE
 761 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 762 #else
 763 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 764 #endif
 765
 766 #ifndef SLAB_DESTROY_BY_RCU
 767 #define CFS_SLAB_DESTROY_BY_RCU 0
 768 #else
 769 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 770 #endif
 771
 772 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 773 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 774 #else
 775 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 776 #endif
 777
 778 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 779 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 780 #else
 781 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 782 #endif
 783
 784 static inline int
 785 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 786 {
 787         if (sb->s_qcop->quota_on) {
 788                 return sb->s_qcop->quota_on(sb, off, ver, name
 789 #ifdef HAVE_QUOTA_ON_5ARGS
 790                                             , remount
 791 #endif
 792                                            );
 793         }
 794         else
 795                 return -ENOSYS;
 796 }
 797
 798 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 799 {
 800         if (sb->s_qcop->quota_off) {
 801                 return sb->s_qcop->quota_off(sb, off
 802 #ifdef HAVE_QUOTA_OFF_3ARGS
 803                                              , remount
 804 #endif
 805                                             );
 806         }
 807         else
 808                 return -ENOSYS;
 809 }
 810
 811 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 812 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 813 #endif
 814
 815 #ifndef HAVE_VFS_DQ_OFF
 816 # define ll_vfs_dq_init             DQUOT_INIT
 817 # define ll_vfs_dq_drop             DQUOT_DROP
 818 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 819 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 820 #else
 821 # define ll_vfs_dq_init             vfs_dq_init
 822 # define ll_vfs_dq_drop             vfs_dq_drop
 823 # define ll_vfs_dq_transfer         vfs_dq_transfer
 824 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 825 #endif
 826
 827 #ifdef HAVE_BDI_INIT
 828 #define ll_bdi_init(bdi)    bdi_init(bdi)
 829 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 830 #else
 831 #define ll_bdi_init(bdi)    0
 832 #define ll_bdi_destroy(bdi) do { } while(0)
 833 #endif
 834
 835 #ifdef HAVE_NEW_BACKING_DEV_INFO
 836 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 837 #else
 838 # define ll_bdi_wb_cnt(bdi) 1
 839 #endif
 840
 841 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 842 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 843 #endif
 844
 845 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 846 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 847 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 848 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 849 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 850 #endif
 851
 852 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 853 #define blk_queue_max_segments(rq, seg)                      \
 854         do { blk_queue_max_phys_segments(rq, seg);           \
 855              blk_queue_max_hw_segments(rq, seg); } while (0)
 856 #else
 857 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 858 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 859 #endif
 860
 861
 862 #ifndef HAVE_BI_HW_SEGMENTS
 863 #define bio_hw_segments(q, bio) 0
 864 #endif
 865
 866 #endif /* __KERNEL__ */
 867 #endif /* _COMPAT25_H */