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 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 201 #define ll_generic_permission(inode, mask, flags, check_acl) \
 202         generic_permission(inode, mask, flags, check_acl)
 203 #else
 204 #define ll_generic_permission(inode, mask, flags, check_acl) \
 205         generic_permission(inode, mask, check_acl)
 206 #endif
 207
 208 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 209 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 210 #define ll_call_writepage(inode, page)  \
 211                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 212 #define ll_invalidate_inode_pages(inode) \
 213                                 invalidate_inode_pages((inode)->i_mapping)
 214
 215 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 216 #define ll_dev_t                        dev_t
 217 #define kdev_t                          dev_t
 218 #define to_kdev_t(dev)                  (dev)
 219 #define kdev_t_to_nr(dev)               (dev)
 220 #define val_to_kdev(dev)                (dev)
 221
 222 #ifdef HAVE_BLKDEV_PUT_2ARGS
 223 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 224 #else
 225 #define ll_blkdev_put(a, b) blkdev_put(a)
 226 #endif
 227
 228 #ifdef HAVE_DENTRY_OPEN_4ARGS
 229 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 230 #else
 231 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 232 #endif
 233
 234 #include <linux/writeback.h>
 235
 236 static inline int cfs_cleanup_group_info(void)
 237 {
 238         struct group_info *ginfo;
 239
 240         ginfo = groups_alloc(0);
 241         if (!ginfo)
 242                 return -ENOMEM;
 243
 244         set_current_groups(ginfo);
 245         put_group_info(ginfo);
 246
 247         return 0;
 248 }
 249
 250 #define __set_page_ll_data(page, llap) \
 251         do {       \
 252                 page_cache_get(page); \
 253                 SetPagePrivate(page); \
 254                 set_page_private(page, (unsigned long)llap); \
 255         } while (0)
 256 #define __clear_page_ll_data(page) \
 257         do {       \
 258                 ClearPagePrivate(page); \
 259                 set_page_private(page, 0); \
 260                 page_cache_release(page); \
 261         } while(0)
 262
 263 #define kiobuf bio
 264
 265 #include <linux/proc_fs.h>
 266
 267 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 268 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 269 extern void __d_rehash(struct dentry *dentry, int lock);
 270 #endif
 271
 272 #ifdef HAVE_CAN_SLEEP_ARG
 273 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 274         flock_lock_file_wait(file, lock, can_sleep)
 275 #else
 276 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 277         flock_lock_file_wait(file, lock)
 278 #endif
 279
 280 #define CheckWriteback(page, cmd) \
 281         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 282          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 283
 284 #ifdef HAVE_PAGE_LIST
 285 static inline int mapping_has_pages(struct address_space *mapping)
 286 {
 287         int rc = 1;
 288
 289         ll_pgcache_lock(mapping);
 290         if (cfs_list_empty(&mapping->dirty_pages) &&
 291             cfs_list_empty(&mapping->clean_pages) &&
 292             cfs_list_empty(&mapping->locked_pages)) {
 293                 rc = 0;
 294         }
 295         ll_pgcache_unlock(mapping);
 296
 297         return rc;
 298 }
 299 #else
 300 static inline int mapping_has_pages(struct address_space *mapping)
 301 {
 302         return mapping->nrpages > 0;
 303 }
 304 #endif
 305
 306 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 307 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 308 #else
 309 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 310 #endif
 311
 312 #ifdef HAVE_SECURITY_PLUG
 313 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 314                 vfs_symlink(dir, dentry, mnt, path, mode)
 315 #else
 316 #ifdef HAVE_4ARGS_VFS_SYMLINK
 317 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 318                 vfs_symlink(dir, dentry, path, mode)
 319 #else
 320 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 321                        vfs_symlink(dir, dentry, path)
 322 #endif
 323
 324 #define ll_set_dflags(dentry, flags) do { \
 325                 cfs_spin_lock(&dentry->d_lock); \
 326                 dentry->d_flags |= flags; \
 327                 cfs_spin_unlock(&dentry->d_lock); \
 328         } while(0)
 329 #endif
 330
 331 #ifndef container_of
 332 #define container_of(ptr, type, member) ({                      \
 333                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 334                 (type *)( (char *)__mptr - offsetof(type,member) );})
 335 #endif
 336
 337 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 338 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 339 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 340
 341 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 342 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 343 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 344
 345 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 346 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 347 #endif
 348
 349 #include <linux/mpage.h>        /* for generic_writepages */
 350 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 351 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 352 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 353                                            loff_t start, loff_t end)
 354 {
 355         int rc;
 356         struct writeback_control wbc = {
 357                 .sync_mode = WB_SYNC_ALL,
 358                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 359         };
 360
 361 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 362         wbc.range_start = start;
 363         wbc.range_end = end;
 364 #else
 365         wbc.start = start;
 366         wbc.end = end;
 367 #endif
 368
 369 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 370         if (!mapping_cap_writeback_dirty(mapping))
 371                 rc = 0;
 372 #else
 373         if (mapping->backing_dev_info->memory_backed)
 374                 rc = 0;
 375 #endif
 376         /* do_writepages() */
 377         else if (mapping->a_ops->writepages)
 378                 rc = mapping->a_ops->writepages(mapping, &wbc);
 379         else
 380                 rc = generic_writepages(mapping, &wbc);
 381         return rc;
 382 }
 383 #else
 384 int filemap_fdatawrite_range(struct address_space *mapping,
 385                              loff_t start, loff_t end);
 386 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 387
 388 #ifdef HAVE_VFS_KERN_MOUNT
 389 static inline struct vfsmount *
 390 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 391 {
 392         struct file_system_type *type = get_fs_type(fstype);
 393         struct vfsmount *mnt;
 394         if (!type)
 395                 return ERR_PTR(-ENODEV);
 396         mnt = vfs_kern_mount(type, flags, name, data);
 397         cfs_module_put(type->owner);
 398         return mnt;
 399 }
 400 #else
 401 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 402 #endif
 403
 404 #ifndef HAVE_ATOMIC_MNT_COUNT
 405 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 406 {
 407 #ifdef CONFIG_SMP
 408         unsigned int count = 0;
 409         int cpu;
 410
 411         for_each_possible_cpu(cpu) {
 412                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 413         }
 414
 415         return count;
 416 #else
 417         return mnt->mnt_count;
 418 #endif
 419 }
 420 #else
 421 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 422 #endif
 423
 424 #ifdef HAVE_STATFS_DENTRY_PARAM
 425 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 426 #else
 427 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 428 #endif
 429
 430 #ifndef HAVE_SB_TIME_GRAN
 431 #ifndef HAVE_S_TIME_GRAN
 432 #error Need s_time_gran patch!
 433 #endif
 434 static inline u32 get_sb_time_gran(struct super_block *sb)
 435 {
 436         return sb->s_time_gran;
 437 }
 438 #endif
 439
 440 #ifdef HAVE_RW_TREE_LOCK
 441 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 442 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 443 #else
 444 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 445 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 446 #endif
 447
 448 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 449 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 450 #else
 451 static inline
 452 int ll_unregister_blkdev(unsigned int dev, const char *name)
 453 {
 454         unregister_blkdev(dev, name);
 455         return 0;
 456 }
 457 #endif
 458
 459 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 460 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 461 #else
 462 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 463 #endif
 464
 465 #ifdef HAVE_INODE_BLKSIZE
 466 #define ll_inode_blksize(a)     (a)->i_blksize
 467 #else
 468 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 469 #endif
 470
 471 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 472 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 473 #else
 474 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 475 #endif
 476
 477 #ifndef HAVE_D_OBTAIN_ALIAS
 478 /* The old d_alloc_anon() didn't free the inode reference on error
 479  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 480 static inline struct dentry *d_obtain_alias(struct inode *inode)
 481 {
 482         struct dentry *anon = d_alloc_anon(inode);
 483
 484         if (anon == NULL) {
 485                 iput(inode);
 486                 anon = ERR_PTR(-ENOMEM);
 487         }
 488
 489         return anon;
 490 }
 491 #endif
 492
 493 /* add a lustre compatible layer for crypto API */
 494 #include <linux/crypto.h>
 495 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 496 #define ll_crypto_hash          crypto_hash
 497 #define ll_crypto_cipher        crypto_blkcipher
 498 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 499 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 500 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 501 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 502 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 503 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 504                 crypto_alloc_blkcipher(name ,type, mask)
 505 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 506                 crypto_blkcipher_setkey(tfm, key, keylen)
 507 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 508                 crypto_blkcipher_set_iv(tfm, src, len)
 509 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 510                 crypto_blkcipher_get_iv(tfm, dst, len)
 511 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 512                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 513 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 514                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 515 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 516                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 517 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 518                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 519
 520 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 521                                  u8 *key, unsigned int *keylen,
 522                                  struct scatterlist *sg,
 523                                  unsigned int size, u8 *result)
 524 {
 525         struct hash_desc desc;
 526         int              rv;
 527         desc.tfm   = tfm;
 528         desc.flags = 0;
 529         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 530         if (rv) {
 531                 CERROR("failed to hash setkey: %d\n", rv);
 532                 return rv;
 533         }
 534         return crypto_hash_digest(&desc, sg, size, result);
 535 }
 536 static inline
 537 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 538 {
 539         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 540 }
 541 static inline
 542 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 543 {
 544         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 545 }
 546
 547 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 548 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 549 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 550 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 551 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 552 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 553 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 554 #include <linux/scatterlist.h>
 555 #define ll_crypto_hash          crypto_tfm
 556 #define ll_crypto_cipher        crypto_tfm
 557 #ifndef HAVE_STRUCT_HASH_DESC
 558 struct hash_desc {
 559         struct ll_crypto_hash *tfm;
 560         u32                    flags;
 561 };
 562 #endif
 563 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 564 struct blkcipher_desc {
 565         struct ll_crypto_cipher *tfm;
 566         void                    *info;
 567         u32                      flags;
 568 };
 569 #endif
 570 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 571         crypto_cipher_setkey(tfm, key, keylen)
 572 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 573         crypto_cipher_set_iv(tfm, src, len)
 574 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 575         crypto_cipher_get_iv(tfm, dst, len)
 576 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 577         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 578 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 579         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 580 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 581         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 582 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 583         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 584
 585 static inline
 586 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 587                                                    u32 type, u32 mask)
 588 {
 589         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 590         const char *pan = algname;
 591         u32         flag = 0;
 592
 593         if (strncmp("cbc(", algname, 4) == 0)
 594                 flag |= CRYPTO_TFM_MODE_CBC;
 595         else if (strncmp("ecb(", algname, 4) == 0)
 596                 flag |= CRYPTO_TFM_MODE_ECB;
 597         if (flag) {
 598                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 599                 if (vp) {
 600                         memcpy(buf, algname + 4, vp - algname - 4);
 601                         buf[vp - algname - 4] = '\0';
 602                         pan = buf;
 603                 } else {
 604                         flag = 0;
 605                 }
 606         }
 607         return crypto_alloc_tfm(pan, flag);
 608 }
 609
 610 static inline
 611 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 612 {
 613         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 614         const char *pan = alg;
 615
 616         if (strncmp("hmac(", alg, 5) == 0) {
 617                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 618                 if (vp) {
 619                         memcpy(buf, alg+ 5, vp - alg- 5);
 620                         buf[vp - alg - 5] = 0x00;
 621                         pan = buf;
 622                 }
 623         }
 624         return crypto_alloc_tfm(pan, 0);
 625 }
 626 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 627 {
 628        crypto_digest_init(desc->tfm); return 0;
 629 }
 630 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 631                                         struct scatterlist *sg,
 632                                         unsigned int nbytes)
 633 {
 634         struct scatterlist *sl = sg;
 635         unsigned int        count;
 636                 /*
 637                  * This way is very weakness. We must ensure that
 638                  * the sum of sg[0..i]->length isn't greater than nbytes.
 639                  * In the upstream kernel the crypto_hash_update() also
 640                  * via the nbytes computed the count of sg[...].
 641                  * The old style is more safely. but it gone.
 642                  */
 643         for (count = 0; nbytes > 0; count ++, sl ++) {
 644                 nbytes -= sl->length;
 645         }
 646         crypto_digest_update(desc->tfm, sg, count); return 0;
 647 }
 648 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 649 {
 650         crypto_digest_final(desc->tfm, out); return 0;
 651 }
 652 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 653                                  u8 *key, unsigned int *keylen,
 654                                  struct scatterlist *sg,
 655                                  unsigned int nbytes,
 656                                  u8 *out)
 657 {
 658         struct scatterlist *sl = sg;
 659         int                 count;
 660         for (count = 0; nbytes > 0; count ++, sl ++) {
 661                 nbytes -= sl->length;
 662         }
 663         crypto_hmac(tfm, key, keylen, sg, count, out);
 664         return 0;
 665 }
 666
 667 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 668 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 669 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 670 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 671 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 672 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 673 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 674 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 675 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 676 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 677
 678 #ifndef HAVE_SYNCHRONIZE_RCU
 679 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 680 #ifndef synchronize_rcu
 681 #define synchronize_rcu() synchronize_kernel()
 682 #endif
 683 #endif
 684
 685 #ifdef HAVE_FILE_REMOVE_SUID
 686 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 687 #else
 688 # ifdef HAVE_SECURITY_PLUG
 689 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 690 # else
 691 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 692 # endif
 693 #endif
 694
 695 #ifdef HAVE_SECURITY_PLUG
 696 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 697 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 698 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 699 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 700 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 701                 vfs_mknod(dir,entry,mnt,mode,dev)
 702 #define ll_security_inode_unlink(dir,entry,mnt)         \
 703                 security_inode_unlink(dir,entry,mnt)
 704 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 705                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 706 #else
 707 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 708 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 709 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 710 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 711 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 712 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 713 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 714                 vfs_rename(old,old_dir,new,new_dir)
 715 #endif /* HAVE_SECURITY_PLUG */
 716
 717 #ifdef for_each_possible_cpu
 718 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 719 #elif defined(for_each_cpu)
 720 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 721 #endif
 722
 723 #ifdef HAVE_BIO_ENDIO_2ARG
 724 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 725 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 726 #else
 727 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 728 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 729 #endif
 730
 731 #ifdef HAVE_FS_STRUCT_USE_PATH
 732 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 733 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 734 #define cfs_path_put(nd)     path_put(&(nd)->path)
 735 #else
 736 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 737 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 738 #define cfs_path_put(nd)     path_release(nd)
 739 #endif
 740
 741 #ifndef abs
 742 static inline int abs(int x)
 743 {
 744         return (x < 0) ? -x : x;
 745 }
 746 #endif
 747
 748 #ifndef labs
 749 static inline long labs(long x)
 750 {
 751         return (x < 0) ? -x : x;
 752 }
 753 #endif /* HAVE_REGISTER_SHRINKER */
 754
 755 #ifdef HAVE_INVALIDATE_INODE_PAGES
 756 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 757 #endif
 758
 759 #ifdef HAVE_INODE_IPRIVATE
 760 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 761 #else
 762 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 763 #endif
 764
 765 #ifndef SLAB_DESTROY_BY_RCU
 766 #define CFS_SLAB_DESTROY_BY_RCU 0
 767 #else
 768 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 769 #endif
 770
 771 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 772 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 773 #else
 774 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 775 #endif
 776
 777 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 778 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 779 #else
 780 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 781 #endif
 782
 783 static inline int
 784 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 785 {
 786         if (sb->s_qcop->quota_on) {
 787                 return sb->s_qcop->quota_on(sb, off, ver, name
 788 #ifdef HAVE_QUOTA_ON_5ARGS
 789                                             , remount
 790 #endif
 791                                            );
 792         }
 793         else
 794                 return -ENOSYS;
 795 }
 796
 797 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 798 {
 799         if (sb->s_qcop->quota_off) {
 800                 return sb->s_qcop->quota_off(sb, off
 801 #ifdef HAVE_QUOTA_OFF_3ARGS
 802                                              , remount
 803 #endif
 804                                             );
 805         }
 806         else
 807                 return -ENOSYS;
 808 }
 809
 810 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 811 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 812 #endif
 813
 814 #ifndef HAVE_VFS_DQ_OFF
 815 # define ll_vfs_dq_init             DQUOT_INIT
 816 # define ll_vfs_dq_drop             DQUOT_DROP
 817 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 818 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 819 #else
 820 # define ll_vfs_dq_init             vfs_dq_init
 821 # define ll_vfs_dq_drop             vfs_dq_drop
 822 # define ll_vfs_dq_transfer         vfs_dq_transfer
 823 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 824 #endif
 825
 826 #ifdef HAVE_BDI_INIT
 827 #define ll_bdi_init(bdi)    bdi_init(bdi)
 828 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 829 #else
 830 #define ll_bdi_init(bdi)    0
 831 #define ll_bdi_destroy(bdi) do { } while(0)
 832 #endif
 833
 834 #ifdef HAVE_NEW_BACKING_DEV_INFO
 835 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 836 #else
 837 # define ll_bdi_wb_cnt(bdi) 1
 838 #endif
 839
 840 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 841 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 842 #endif
 843
 844 #ifndef HAVE_BLKDEV_GET_BY_DEV
 845 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 846 #endif
 847
 848 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 849 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 850 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 851 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 852 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 853 #endif
 854
 855 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 856 #define blk_queue_max_segments(rq, seg)                      \
 857         do { blk_queue_max_phys_segments(rq, seg);           \
 858              blk_queue_max_hw_segments(rq, seg); } while (0)
 859 #else
 860 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 861 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 862 #endif
 863
 864
 865 #ifndef HAVE_BI_HW_SEGMENTS
 866 #define bio_hw_segments(q, bio) 0
 867 #endif
 868
 869 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 870 #define pagevec_lru_add_file pagevec_lru_add
 871 #endif
 872
 873 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 874 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 875         add_to_page_cache_lru(pg, mapping, off, gfp)
 876 #define ll_pagevec_init(pv, cold)       do {} while (0)
 877 #define ll_pagevec_add(pv, pg)          (0)
 878 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 879 #else
 880 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 881         add_to_page_cache(pg, mapping, off, gfp)
 882 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 883 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 884 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 885 #endif
 886
 887 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 888 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 889 #define HAVE_NODE_TO_CPUMASK
 890 #endif
 891
 892 #endif /* __KERNEL__ */
 893 #endif /* _COMPAT25_H */