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