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