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  * Copyright (c) 2011 Whamcloud, Inc.
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39
  40 #ifndef _LINUX_COMPAT25_H
  41 #define _LINUX_COMPAT25_H
  42
  43 #ifdef __KERNEL__
  44
  45 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  46 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  47 #endif
  48
  49 #include <linux/fs_struct.h>
  50 #include <linux/namei.h>
  51 #include <libcfs/linux/portals_compat25.h>
  52
  53 #include <linux/lustre_patchless_compat.h>
  54
  55 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
  56  * definition allows to compile lustre client on more OS platforms. */
  57 #ifndef SEEK_SET
  58  #define SEEK_SET 0
  59  #define SEEK_CUR 1
  60  #define SEEK_END 2
  61 #endif
  62
  63 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  64 struct ll_iattr {
  65         struct iattr    iattr;
  66         unsigned int    ia_attr_flags;
  67 };
  68 #else
  69 #define ll_iattr iattr
  70 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  71
  72 #ifdef HAVE_FS_STRUCT_RWLOCK
  73 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  74 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  75 #else
  76 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  77 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  78 #endif
  79
  80 #ifdef HAVE_FS_STRUCT_USE_PATH
  81 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  82                                  struct dentry *dentry)
  83 {
  84         struct path path;
  85         struct path old_pwd;
  86
  87         path.mnt = mnt;
  88         path.dentry = dentry;
  89         LOCK_FS_STRUCT(fs);
  90         old_pwd = fs->pwd;
  91         path_get(&path);
  92         fs->pwd = path;
  93         UNLOCK_FS_STRUCT(fs);
  94
  95         if (old_pwd.dentry)
  96                 path_put(&old_pwd);
  97 }
  98
  99 #else
 100
 101 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
 102                 struct dentry *dentry)
 103 {
 104         struct dentry *old_pwd;
 105         struct vfsmount *old_pwdmnt;
 106
 107         LOCK_FS_STRUCT(fs);
 108         old_pwd = fs->pwd;
 109         old_pwdmnt = fs->pwdmnt;
 110         fs->pwdmnt = mntget(mnt);
 111         fs->pwd = dget(dentry);
 112         UNLOCK_FS_STRUCT(fs);
 113
 114         if (old_pwd) {
 115                 dput(old_pwd);
 116                 mntput(old_pwdmnt);
 117         }
 118 }
 119 #endif
 120
 121 /*
 122  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 123  * ATTR_* attributes (see bug 13828)
 124  */
 125 #define ATTR_BLOCKS    (1 << 27)
 126
 127 #if HAVE_INODE_I_MUTEX
 128 #define UNLOCK_INODE_MUTEX(inode) \
 129 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 130 #define LOCK_INODE_MUTEX(inode) \
 131 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 132 #define LOCK_INODE_MUTEX_PARENT(inode) \
 133 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 134 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 135 #else
 136 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 137 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 138 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 139 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 140 #endif /* HAVE_INODE_I_MUTEX */
 141
 142 #ifdef HAVE_SEQ_LOCK
 143 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 144 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 145 #else
 146 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 147 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 148 #endif
 149
 150 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 151 #define d_child d_u.d_child
 152 #define d_rcu d_u.d_rcu
 153 #endif
 154
 155 #ifdef HAVE_DQUOTOFF_MUTEX
 156 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 157 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 158 #else
 159 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 160 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 161 #endif /* HAVE_DQUOTOFF_MUTEX */
 162
 163 #define current_ngroups current_cred()->group_info->ngroups
 164 #define current_groups current_cred()->group_info->small_block
 165
 166 #ifndef page_private
 167 #define page_private(page) ((page)->private)
 168 #define set_page_private(page, v) ((page)->private = (v))
 169 #endif
 170
 171 #ifndef HAVE_GFP_T
 172 #define gfp_t int
 173 #endif
 174
 175 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 176 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 177
 178 #define ll_kernel_locked()      kernel_locked()
 179
 180 /*
 181  * OBD need working random driver, thus all our
 182  * initialization routines must be called after device
 183  * driver initialization
 184  */
 185 #ifndef MODULE
 186 #undef module_init
 187 #define module_init(a)     late_initcall(a)
 188 #endif
 189
 190 /* XXX our code should be using the 2.6 calls, not the other way around */
 191 #ifdef HAVE_TRYLOCK_PAGE
 192 #define TestSetPageLocked(page)         (!trylock_page(page))
 193 #endif
 194
 195 #define Page_Uptodate(page)             PageUptodate(page)
 196 #define ll_redirty_page(page)           set_page_dirty(page)
 197
 198 #define KDEVT_INIT(val)                 (val)
 199
 200 #define LTIME_S(time)                   (time.tv_sec)
 201 #define ll_path_lookup                  path_lookup
 202
 203 #ifdef HAVE_EXPORT_INODE_PERMISSION
 204 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 205 #else
 206 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 207 #endif
 208
 209 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 210 #define ll_generic_permission(inode, mask, flags, check_acl) \
 211         generic_permission(inode, mask, flags, check_acl)
 212 #else
 213 #define ll_generic_permission(inode, mask, flags, check_acl) \
 214         generic_permission(inode, mask, check_acl)
 215 #endif
 216
 217 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 218 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 219 #define ll_call_writepage(inode, page)  \
 220                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 221 #define ll_invalidate_inode_pages(inode) \
 222                                 invalidate_inode_pages((inode)->i_mapping)
 223
 224 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 225 #define ll_dev_t                        dev_t
 226 #define kdev_t                          dev_t
 227 #define to_kdev_t(dev)                  (dev)
 228 #define kdev_t_to_nr(dev)               (dev)
 229 #define val_to_kdev(dev)                (dev)
 230
 231 #ifdef HAVE_BLKDEV_PUT_2ARGS
 232 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 233 #else
 234 #define ll_blkdev_put(a, b) blkdev_put(a)
 235 #endif
 236
 237 #ifdef HAVE_DENTRY_OPEN_4ARGS
 238 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 239 #else
 240 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 241 #endif
 242
 243 #include <linux/writeback.h>
 244
 245 static inline int cfs_cleanup_group_info(void)
 246 {
 247         struct group_info *ginfo;
 248
 249         ginfo = groups_alloc(0);
 250         if (!ginfo)
 251                 return -ENOMEM;
 252
 253         set_current_groups(ginfo);
 254         put_group_info(ginfo);
 255
 256         return 0;
 257 }
 258
 259 #define __set_page_ll_data(page, llap) \
 260         do {       \
 261                 page_cache_get(page); \
 262                 SetPagePrivate(page); \
 263                 set_page_private(page, (unsigned long)llap); \
 264         } while (0)
 265 #define __clear_page_ll_data(page) \
 266         do {       \
 267                 ClearPagePrivate(page); \
 268                 set_page_private(page, 0); \
 269                 page_cache_release(page); \
 270         } while(0)
 271
 272 #define kiobuf bio
 273
 274 #include <linux/proc_fs.h>
 275
 276 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 277 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 278 extern void __d_rehash(struct dentry *dentry, int lock);
 279 #endif
 280
 281 #ifdef HAVE_CAN_SLEEP_ARG
 282 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 283         flock_lock_file_wait(file, lock, can_sleep)
 284 #else
 285 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 286         flock_lock_file_wait(file, lock)
 287 #endif
 288
 289 #define CheckWriteback(page, cmd) \
 290         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 291          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 292
 293 #ifdef HAVE_PAGE_LIST
 294 static inline int mapping_has_pages(struct address_space *mapping)
 295 {
 296         int rc = 1;
 297
 298         ll_pgcache_lock(mapping);
 299         if (cfs_list_empty(&mapping->dirty_pages) &&
 300             cfs_list_empty(&mapping->clean_pages) &&
 301             cfs_list_empty(&mapping->locked_pages)) {
 302                 rc = 0;
 303         }
 304         ll_pgcache_unlock(mapping);
 305
 306         return rc;
 307 }
 308 #else
 309 static inline int mapping_has_pages(struct address_space *mapping)
 310 {
 311         return mapping->nrpages > 0;
 312 }
 313 #endif
 314
 315 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 316 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 317 #else
 318 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 319 #endif
 320
 321 #ifdef HAVE_SECURITY_PLUG
 322 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 323                 vfs_symlink(dir, dentry, mnt, path, mode)
 324 #else
 325 #ifdef HAVE_4ARGS_VFS_SYMLINK
 326 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 327                 vfs_symlink(dir, dentry, path, mode)
 328 #else
 329 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 330                        vfs_symlink(dir, dentry, path)
 331 #endif
 332
 333 #define ll_set_dflags(dentry, flags) do { \
 334                 cfs_spin_lock(&dentry->d_lock); \
 335                 dentry->d_flags |= flags; \
 336                 cfs_spin_unlock(&dentry->d_lock); \
 337         } while(0)
 338 #endif
 339
 340 #ifndef container_of
 341 #define container_of(ptr, type, member) ({                      \
 342                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 343                 (type *)( (char *)__mptr - offsetof(type,member) );})
 344 #endif
 345
 346 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 347 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 348 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 349
 350 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 351 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 352 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 353
 354 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 355 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 356 #endif
 357
 358 #include <linux/mpage.h>        /* for generic_writepages */
 359 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 360 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 361 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 362                                            loff_t start, loff_t end)
 363 {
 364         int rc;
 365         struct writeback_control wbc = {
 366                 .sync_mode = WB_SYNC_ALL,
 367                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 368         };
 369
 370 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 371         wbc.range_start = start;
 372         wbc.range_end = end;
 373 #else
 374         wbc.start = start;
 375         wbc.end = end;
 376 #endif
 377
 378 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 379         if (!mapping_cap_writeback_dirty(mapping))
 380                 rc = 0;
 381 #else
 382         if (mapping->backing_dev_info->memory_backed)
 383                 rc = 0;
 384 #endif
 385         /* do_writepages() */
 386         else if (mapping->a_ops->writepages)
 387                 rc = mapping->a_ops->writepages(mapping, &wbc);
 388         else
 389                 rc = generic_writepages(mapping, &wbc);
 390         return rc;
 391 }
 392 #else
 393 int filemap_fdatawrite_range(struct address_space *mapping,
 394                              loff_t start, loff_t end);
 395 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 396
 397 #ifdef HAVE_VFS_KERN_MOUNT
 398 static inline struct vfsmount *
 399 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 400 {
 401         struct file_system_type *type = get_fs_type(fstype);
 402         struct vfsmount *mnt;
 403         if (!type)
 404                 return ERR_PTR(-ENODEV);
 405         mnt = vfs_kern_mount(type, flags, name, data);
 406         cfs_module_put(type->owner);
 407         return mnt;
 408 }
 409 #else
 410 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 411 #endif
 412
 413 #ifndef HAVE_ATOMIC_MNT_COUNT
 414 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 415 {
 416 #ifdef CONFIG_SMP
 417         unsigned int count = 0;
 418         int cpu;
 419
 420         for_each_possible_cpu(cpu) {
 421                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 422         }
 423
 424         return count;
 425 #else
 426         return mnt->mnt_count;
 427 #endif
 428 }
 429 #else
 430 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 431 #endif
 432
 433 #ifdef HAVE_STATFS_DENTRY_PARAM
 434 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 435 #else
 436 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 437 #endif
 438
 439 #ifndef HAVE_SB_TIME_GRAN
 440 #ifndef HAVE_S_TIME_GRAN
 441 #error Need s_time_gran patch!
 442 #endif
 443 static inline u32 get_sb_time_gran(struct super_block *sb)
 444 {
 445         return sb->s_time_gran;
 446 }
 447 #endif
 448
 449 #ifdef HAVE_RW_TREE_LOCK
 450 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 451 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 452 #else
 453 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 454 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 455 #endif
 456
 457 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 458 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 459 #else
 460 static inline
 461 int ll_unregister_blkdev(unsigned int dev, const char *name)
 462 {
 463         unregister_blkdev(dev, name);
 464         return 0;
 465 }
 466 #endif
 467
 468 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 469 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 470 #else
 471 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 472 #endif
 473
 474 #ifdef HAVE_INODE_BLKSIZE
 475 #define ll_inode_blksize(a)     (a)->i_blksize
 476 #else
 477 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 478 #endif
 479
 480 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 481 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 482 #else
 483 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 484 #endif
 485
 486 #ifndef HAVE_D_OBTAIN_ALIAS
 487 /* The old d_alloc_anon() didn't free the inode reference on error
 488  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 489 static inline struct dentry *d_obtain_alias(struct inode *inode)
 490 {
 491         struct dentry *anon = d_alloc_anon(inode);
 492
 493         if (anon == NULL) {
 494                 iput(inode);
 495                 anon = ERR_PTR(-ENOMEM);
 496         }
 497
 498         return anon;
 499 }
 500 #endif
 501
 502 /* add a lustre compatible layer for crypto API */
 503 #include <linux/crypto.h>
 504 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 505 #define ll_crypto_hash          crypto_hash
 506 #define ll_crypto_cipher        crypto_blkcipher
 507 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 508 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 509 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 510 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 511 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 512 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 513                 crypto_alloc_blkcipher(name ,type, mask)
 514 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 515                 crypto_blkcipher_setkey(tfm, key, keylen)
 516 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 517                 crypto_blkcipher_set_iv(tfm, src, len)
 518 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 519                 crypto_blkcipher_get_iv(tfm, dst, len)
 520 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 521                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 522 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 523                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 524 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 525                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 526 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 527                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 528
 529 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 530                                  u8 *key, unsigned int *keylen,
 531                                  struct scatterlist *sg,
 532                                  unsigned int size, u8 *result)
 533 {
 534         struct hash_desc desc;
 535         int              rv;
 536         desc.tfm   = tfm;
 537         desc.flags = 0;
 538         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 539         if (rv) {
 540                 CERROR("failed to hash setkey: %d\n", rv);
 541                 return rv;
 542         }
 543         return crypto_hash_digest(&desc, sg, size, result);
 544 }
 545 static inline
 546 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 547 {
 548         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 549 }
 550 static inline
 551 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 552 {
 553         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 554 }
 555
 556 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 557 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 558 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 559 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 560 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 561 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 562 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 563 #include <linux/scatterlist.h>
 564 #define ll_crypto_hash          crypto_tfm
 565 #define ll_crypto_cipher        crypto_tfm
 566 #ifndef HAVE_STRUCT_HASH_DESC
 567 struct hash_desc {
 568         struct ll_crypto_hash *tfm;
 569         u32                    flags;
 570 };
 571 #endif
 572 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 573 struct blkcipher_desc {
 574         struct ll_crypto_cipher *tfm;
 575         void                    *info;
 576         u32                      flags;
 577 };
 578 #endif
 579 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 580         crypto_cipher_setkey(tfm, key, keylen)
 581 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 582         crypto_cipher_set_iv(tfm, src, len)
 583 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 584         crypto_cipher_get_iv(tfm, dst, len)
 585 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 586         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 587 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 588         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 589 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 590         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 591 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 592         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 593
 594 static inline
 595 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 596                                                    u32 type, u32 mask)
 597 {
 598         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 599         const char *pan = algname;
 600         u32         flag = 0;
 601
 602         if (strncmp("cbc(", algname, 4) == 0)
 603                 flag |= CRYPTO_TFM_MODE_CBC;
 604         else if (strncmp("ecb(", algname, 4) == 0)
 605                 flag |= CRYPTO_TFM_MODE_ECB;
 606         if (flag) {
 607                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 608                 if (vp) {
 609                         memcpy(buf, algname + 4, vp - algname - 4);
 610                         buf[vp - algname - 4] = '\0';
 611                         pan = buf;
 612                 } else {
 613                         flag = 0;
 614                 }
 615         }
 616         return crypto_alloc_tfm(pan, flag);
 617 }
 618
 619 static inline
 620 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 621 {
 622         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 623         const char *pan = alg;
 624
 625         if (strncmp("hmac(", alg, 5) == 0) {
 626                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 627                 if (vp) {
 628                         memcpy(buf, alg+ 5, vp - alg- 5);
 629                         buf[vp - alg - 5] = 0x00;
 630                         pan = buf;
 631                 }
 632         }
 633         return crypto_alloc_tfm(pan, 0);
 634 }
 635 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 636 {
 637        crypto_digest_init(desc->tfm); return 0;
 638 }
 639 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 640                                         struct scatterlist *sg,
 641                                         unsigned int nbytes)
 642 {
 643         struct scatterlist *sl = sg;
 644         unsigned int        count;
 645                 /*
 646                  * This way is very weakness. We must ensure that
 647                  * the sum of sg[0..i]->length isn't greater than nbytes.
 648                  * In the upstream kernel the crypto_hash_update() also
 649                  * via the nbytes computed the count of sg[...].
 650                  * The old style is more safely. but it gone.
 651                  */
 652         for (count = 0; nbytes > 0; count ++, sl ++) {
 653                 nbytes -= sl->length;
 654         }
 655         crypto_digest_update(desc->tfm, sg, count); return 0;
 656 }
 657 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 658 {
 659         crypto_digest_final(desc->tfm, out); return 0;
 660 }
 661 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 662                                  u8 *key, unsigned int *keylen,
 663                                  struct scatterlist *sg,
 664                                  unsigned int nbytes,
 665                                  u8 *out)
 666 {
 667         struct scatterlist *sl = sg;
 668         int                 count;
 669         for (count = 0; nbytes > 0; count ++, sl ++) {
 670                 nbytes -= sl->length;
 671         }
 672         crypto_hmac(tfm, key, keylen, sg, count, out);
 673         return 0;
 674 }
 675
 676 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 677 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 678 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 679 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 680 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 681 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 682 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 683 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 684 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 685 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 686
 687 #ifndef HAVE_SYNCHRONIZE_RCU
 688 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 689 #ifndef synchronize_rcu
 690 #define synchronize_rcu() synchronize_kernel()
 691 #endif
 692 #endif
 693
 694 #ifdef HAVE_FILE_REMOVE_SUID
 695 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 696 #else
 697 # ifdef HAVE_SECURITY_PLUG
 698 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 699 # else
 700 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 701 # endif
 702 #endif
 703
 704 #ifdef HAVE_SECURITY_PLUG
 705 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 706 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 707 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 708 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 709 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 710                 vfs_mknod(dir,entry,mnt,mode,dev)
 711 #define ll_security_inode_unlink(dir,entry,mnt)         \
 712                 security_inode_unlink(dir,entry,mnt)
 713 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 714                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 715 #else
 716 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 717 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 718 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 719 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 720 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 721 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 722 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 723                 vfs_rename(old,old_dir,new,new_dir)
 724 #endif /* HAVE_SECURITY_PLUG */
 725
 726 #ifdef for_each_possible_cpu
 727 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 728 #elif defined(for_each_cpu)
 729 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 730 #endif
 731
 732 #ifdef HAVE_BIO_ENDIO_2ARG
 733 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 734 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 735 #else
 736 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 737 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 738 #endif
 739
 740 #ifdef HAVE_FS_STRUCT_USE_PATH
 741 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 742 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 743 #define cfs_path_put(nd)     path_put(&(nd)->path)
 744 #else
 745 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 746 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 747 #define cfs_path_put(nd)     path_release(nd)
 748 #endif
 749
 750 #ifndef abs
 751 static inline int abs(int x)
 752 {
 753         return (x < 0) ? -x : x;
 754 }
 755 #endif
 756
 757 #ifndef labs
 758 static inline long labs(long x)
 759 {
 760         return (x < 0) ? -x : x;
 761 }
 762 #endif /* HAVE_REGISTER_SHRINKER */
 763
 764 #ifdef HAVE_INVALIDATE_INODE_PAGES
 765 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 766 #endif
 767
 768 #ifdef HAVE_INODE_IPRIVATE
 769 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 770 #else
 771 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 772 #endif
 773
 774 #ifndef SLAB_DESTROY_BY_RCU
 775 #define CFS_SLAB_DESTROY_BY_RCU 0
 776 #else
 777 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 778 #endif
 779
 780 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 781 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 782 #else
 783 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 784 #endif
 785
 786 #ifdef DQUOT_USAGE_ENABLED
 787 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 788 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 789 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 790 #else
 791 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 792 #endif
 793
 794 static inline int
 795 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 796 {
 797         int rc;
 798
 799         if (sb->s_qcop->quota_on) {
 800 #ifdef HAVE_QUOTA_ON_USE_PATH
 801                 struct path path;
 802
 803                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 804                 if (!rc)
 805                         return rc;
 806 #endif
 807                 rc = sb->s_qcop->quota_on(sb, off, ver
 808 #ifdef HAVE_QUOTA_ON_USE_PATH
 809                                             , &path
 810 #else
 811                                             , name
 812 #endif
 813 #ifdef HAVE_QUOTA_ON_5ARGS
 814                                             , remount
 815 #endif
 816                                            );
 817 #ifdef HAVE_QUOTA_ON_USE_PATH
 818                 path_put(&path);
 819 #endif
 820                 return rc;
 821         }
 822         else
 823                 return -ENOSYS;
 824 }
 825
 826 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 827 {
 828         if (sb->s_qcop->quota_off) {
 829                 return sb->s_qcop->quota_off(sb, off
 830 #ifdef HAVE_QUOTA_OFF_3ARGS
 831                                              , remount
 832 #endif
 833                                             );
 834         }
 835         else
 836                 return -ENOSYS;
 837 }
 838
 839 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 840 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 841 #endif
 842
 843 #ifndef HAVE_VFS_DQ_OFF
 844 # define ll_vfs_dq_init             DQUOT_INIT
 845 # define ll_vfs_dq_drop             DQUOT_DROP
 846 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 847 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 848 #else
 849 # define ll_vfs_dq_init             vfs_dq_init
 850 # define ll_vfs_dq_drop             vfs_dq_drop
 851 # define ll_vfs_dq_transfer         vfs_dq_transfer
 852 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 853 #endif
 854
 855 #ifdef HAVE_BDI_INIT
 856 #define ll_bdi_init(bdi)    bdi_init(bdi)
 857 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 858 #else
 859 #define ll_bdi_init(bdi)    0
 860 #define ll_bdi_destroy(bdi) do { } while(0)
 861 #endif
 862
 863 #ifdef HAVE_NEW_BACKING_DEV_INFO
 864 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 865 #else
 866 # define ll_bdi_wb_cnt(bdi) 1
 867 #endif
 868
 869 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 870 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 871 #endif
 872
 873 #ifndef HAVE_BLKDEV_GET_BY_DEV
 874 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 875 #endif
 876
 877 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 878 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 879 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 880 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 881 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 882 #endif
 883
 884 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 885 #define blk_queue_max_segments(rq, seg)                      \
 886         do { blk_queue_max_phys_segments(rq, seg);           \
 887              blk_queue_max_hw_segments(rq, seg); } while (0)
 888 #else
 889 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 890 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 891 #endif
 892
 893
 894 #ifndef HAVE_BI_HW_SEGMENTS
 895 #define bio_hw_segments(q, bio) 0
 896 #endif
 897
 898 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 899 #define pagevec_lru_add_file pagevec_lru_add
 900 #endif
 901
 902 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 903 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 904         add_to_page_cache_lru(pg, mapping, off, gfp)
 905 #define ll_pagevec_init(pv, cold)       do {} while (0)
 906 #define ll_pagevec_add(pv, pg)          (0)
 907 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 908 #else
 909 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 910         add_to_page_cache(pg, mapping, off, gfp)
 911 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 912 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 913 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 914 #endif
 915
 916 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 917 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 918 #define HAVE_NODE_TO_CPUMASK
 919 #endif
 920
 921 #ifndef QUOTA_OK
 922 # define QUOTA_OK 0
 923 #endif
 924 #ifndef NO_QUOTA
 925 # define NO_QUOTA (-EDQUOT)
 926 #endif
 927
 928 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 929 # define ext2_set_bit             __test_and_set_bit_le
 930 # define ext2_clear_bit           __test_and_clear_bit_le
 931 # define ext2_test_bit            test_bit_le
 932 # define ext2_find_first_zero_bit find_first_zero_bit_le
 933 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 934 #endif
 935
 936 #endif /* __KERNEL__ */
 937 #endif /* _COMPAT25_H */