lustre/include/linux/lustre_compat25.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  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 <linux/namei.h>
  48 #include <libcfs/linux/portals_compat25.h>
  49
  50 #include <linux/lustre_patchless_compat.h>
  51
  52 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
  53  * definition allows to compile lustre client on more OS platforms. */
  54 #ifndef SEEK_SET
  55  #define SEEK_SET 0
  56  #define SEEK_CUR 1
  57  #define SEEK_END 2
  58 #endif
  59
  60 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  61 struct ll_iattr {
  62         struct iattr    iattr;
  63         unsigned int    ia_attr_flags;
  64 };
  65 #else
  66 #define ll_iattr iattr
  67 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  68
  69 #ifdef HAVE_FS_STRUCT_RWLOCK
  70 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  71 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  72 #else
  73 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  74 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  75 #endif
  76
  77 #ifdef HAVE_FS_STRUCT_USE_PATH
  78 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  79                                  struct dentry *dentry)
  80 {
  81         struct path path;
  82         struct path old_pwd;
  83
  84         path.mnt = mnt;
  85         path.dentry = dentry;
  86         LOCK_FS_STRUCT(fs);
  87         old_pwd = fs->pwd;
  88         path_get(&path);
  89         fs->pwd = path;
  90         UNLOCK_FS_STRUCT(fs);
  91
  92         if (old_pwd.dentry)
  93                 path_put(&old_pwd);
  94 }
  95
  96 #else
  97
  98 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  99                 struct dentry *dentry)
 100 {
 101         struct dentry *old_pwd;
 102         struct vfsmount *old_pwdmnt;
 103
 104         LOCK_FS_STRUCT(fs);
 105         old_pwd = fs->pwd;
 106         old_pwdmnt = fs->pwdmnt;
 107         fs->pwdmnt = mntget(mnt);
 108         fs->pwd = dget(dentry);
 109         UNLOCK_FS_STRUCT(fs);
 110
 111         if (old_pwd) {
 112                 dput(old_pwd);
 113                 mntput(old_pwdmnt);
 114         }
 115 }
 116 #endif
 117
 118 /*
 119  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 120  * ATTR_* attributes (see bug 13828)
 121  */
 122 #define ATTR_BLOCKS    (1 << 27)
 123
 124 #if HAVE_INODE_I_MUTEX
 125 #define UNLOCK_INODE_MUTEX(inode) \
 126 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 127 #define LOCK_INODE_MUTEX(inode) \
 128 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 129 #define LOCK_INODE_MUTEX_PARENT(inode) \
 130 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 131 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 132 #else
 133 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 134 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 135 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 136 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 137 #endif /* HAVE_INODE_I_MUTEX */
 138
 139 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 140 #define d_child d_u.d_child
 141 #define d_rcu d_u.d_rcu
 142 #endif
 143
 144 #ifdef HAVE_DQUOTOFF_MUTEX
 145 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 146 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 147 #else
 148 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 149 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 150 #endif /* HAVE_DQUOTOFF_MUTEX */
 151
 152 #define current_ngroups current_cred()->group_info->ngroups
 153 #define current_groups current_cred()->group_info->small_block
 154
 155 #ifndef page_private
 156 #define page_private(page) ((page)->private)
 157 #define set_page_private(page, v) ((page)->private = (v))
 158 #endif
 159
 160 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 161 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 162
 163 #define ll_kernel_locked()      kernel_locked()
 164
 165 /*
 166  * OBD need working random driver, thus all our
 167  * initialization routines must be called after device
 168  * driver initialization
 169  */
 170 #ifndef MODULE
 171 #undef module_init
 172 #define module_init(a)     late_initcall(a)
 173 #endif
 174
 175 /* XXX our code should be using the 2.6 calls, not the other way around */
 176 #ifdef HAVE_TRYLOCK_PAGE
 177 #define TestSetPageLocked(page)         (!trylock_page(page))
 178 #endif
 179
 180 #define Page_Uptodate(page)             PageUptodate(page)
 181 #define ll_redirty_page(page)           set_page_dirty(page)
 182
 183 #define KDEVT_INIT(val)                 (val)
 184
 185 #define LTIME_S(time)                   (time.tv_sec)
 186 #define ll_path_lookup                  path_lookup
 187
 188 #ifdef HAVE_EXPORT_INODE_PERMISSION
 189 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 190 #else
 191 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 192 #endif
 193
 194 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 195 #define ll_generic_permission(inode, mask, flags, check_acl) \
 196         generic_permission(inode, mask, flags, check_acl)
 197 #else
 198 #define ll_generic_permission(inode, mask, flags, check_acl) \
 199         generic_permission(inode, mask, check_acl)
 200 #endif
 201
 202 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 203 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 204 #define ll_call_writepage(inode, page)  \
 205                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 206 #define ll_invalidate_inode_pages(inode) \
 207                                 invalidate_inode_pages((inode)->i_mapping)
 208
 209 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 210 #define ll_dev_t                        dev_t
 211 #define kdev_t                          dev_t
 212 #define to_kdev_t(dev)                  (dev)
 213 #define kdev_t_to_nr(dev)               (dev)
 214 #define val_to_kdev(dev)                (dev)
 215
 216 #ifdef HAVE_BLKDEV_PUT_2ARGS
 217 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 218 #else
 219 #define ll_blkdev_put(a, b) blkdev_put(a)
 220 #endif
 221
 222 #ifdef HAVE_DENTRY_OPEN_4ARGS
 223 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 224 #else
 225 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 226 #endif
 227
 228 #include <linux/writeback.h>
 229
 230 static inline int cfs_cleanup_group_info(void)
 231 {
 232         struct group_info *ginfo;
 233
 234         ginfo = groups_alloc(0);
 235         if (!ginfo)
 236                 return -ENOMEM;
 237
 238         set_current_groups(ginfo);
 239         put_group_info(ginfo);
 240
 241         return 0;
 242 }
 243
 244 #define __set_page_ll_data(page, llap) \
 245         do {       \
 246                 page_cache_get(page); \
 247                 SetPagePrivate(page); \
 248                 set_page_private(page, (unsigned long)llap); \
 249         } while (0)
 250 #define __clear_page_ll_data(page) \
 251         do {       \
 252                 ClearPagePrivate(page); \
 253                 set_page_private(page, 0); \
 254                 page_cache_release(page); \
 255         } while(0)
 256
 257 #define kiobuf bio
 258
 259 #include <linux/proc_fs.h>
 260
 261 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 262 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 263 extern void __d_rehash(struct dentry *dentry, int lock);
 264 #endif
 265
 266 #define CheckWriteback(page, cmd) \
 267         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 268          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 269
 270 #ifdef HAVE_PAGE_LIST
 271 static inline int mapping_has_pages(struct address_space *mapping)
 272 {
 273         int rc = 1;
 274
 275         ll_pgcache_lock(mapping);
 276         if (cfs_list_empty(&mapping->dirty_pages) &&
 277             cfs_list_empty(&mapping->clean_pages) &&
 278             cfs_list_empty(&mapping->locked_pages)) {
 279                 rc = 0;
 280         }
 281         ll_pgcache_unlock(mapping);
 282
 283         return rc;
 284 }
 285 #else
 286 static inline int mapping_has_pages(struct address_space *mapping)
 287 {
 288         return mapping->nrpages > 0;
 289 }
 290 #endif
 291
 292 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 293 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 294 #else
 295 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 296 #endif
 297
 298 #ifdef HAVE_SECURITY_PLUG
 299 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 300                 vfs_symlink(dir, dentry, mnt, path, mode)
 301 #else
 302 #ifdef HAVE_4ARGS_VFS_SYMLINK
 303 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 304                 vfs_symlink(dir, dentry, path, mode)
 305 #else
 306 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 307                        vfs_symlink(dir, dentry, path)
 308 #endif
 309
 310 #define ll_set_dflags(dentry, flags) do { \
 311                 cfs_spin_lock(&dentry->d_lock); \
 312                 dentry->d_flags |= flags; \
 313                 cfs_spin_unlock(&dentry->d_lock); \
 314         } while(0)
 315 #endif
 316
 317 #ifndef container_of
 318 #define container_of(ptr, type, member) ({                      \
 319                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 320                 (type *)( (char *)__mptr - offsetof(type,member) );})
 321 #endif
 322
 323 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 324 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 325 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 326
 327 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 328 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 329 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 330
 331 #include <linux/mpage.h>        /* for generic_writepages */
 332
 333 #ifndef HAVE_ATOMIC_MNT_COUNT
 334 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 335 {
 336 #ifdef CONFIG_SMP
 337         unsigned int count = 0;
 338         int cpu;
 339
 340         for_each_possible_cpu(cpu) {
 341                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 342         }
 343
 344         return count;
 345 #else
 346         return mnt->mnt_count;
 347 #endif
 348 }
 349 #else
 350 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 351 #endif
 352
 353 #ifdef HAVE_STATFS_DENTRY_PARAM
 354 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 355 #else
 356 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 357 #endif
 358
 359 #ifndef HAVE_SB_TIME_GRAN
 360 #ifndef HAVE_S_TIME_GRAN
 361 #error Need s_time_gran patch!
 362 #endif
 363 static inline u32 get_sb_time_gran(struct super_block *sb)
 364 {
 365         return sb->s_time_gran;
 366 }
 367 #endif
 368
 369 #ifdef HAVE_RW_TREE_LOCK
 370 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 371 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 372 #else
 373 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 374 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 375 #endif
 376
 377 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 378 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 379 #else
 380 static inline
 381 int ll_unregister_blkdev(unsigned int dev, const char *name)
 382 {
 383         unregister_blkdev(dev, name);
 384         return 0;
 385 }
 386 #endif
 387
 388 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 389 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 390 #else
 391 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 392 #endif
 393
 394 #ifdef HAVE_INODE_BLKSIZE
 395 #define ll_inode_blksize(a)     (a)->i_blksize
 396 #else
 397 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 398 #endif
 399
 400 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 401 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 402 #else
 403 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 404 #endif
 405
 406 #ifndef HAVE_D_OBTAIN_ALIAS
 407 /* The old d_alloc_anon() didn't free the inode reference on error
 408  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 409 static inline struct dentry *d_obtain_alias(struct inode *inode)
 410 {
 411         struct dentry *anon = d_alloc_anon(inode);
 412
 413         if (anon == NULL) {
 414                 iput(inode);
 415                 anon = ERR_PTR(-ENOMEM);
 416         }
 417
 418         return anon;
 419 }
 420 #endif
 421
 422 /* add a lustre compatible layer for crypto API */
 423 #include <linux/crypto.h>
 424 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 425 #define ll_crypto_hash          crypto_hash
 426 #define ll_crypto_cipher        crypto_blkcipher
 427 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 428 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 429 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 430 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 431 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 432 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 433                 crypto_blkcipher_setkey(tfm, key, keylen)
 434 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 435                 crypto_blkcipher_set_iv(tfm, src, len)
 436 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 437                 crypto_blkcipher_get_iv(tfm, dst, len)
 438 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 439                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 440 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 441                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 442 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 443                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 444 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 445                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 446
 447 static inline
 448 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 449                                                    u32 type, u32 mask)
 450 {
 451         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 452
 453         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 454 }
 455
 456 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 457                                  u8 *key, unsigned int *keylen,
 458                                  struct scatterlist *sg,
 459                                  unsigned int size, u8 *result)
 460 {
 461         struct hash_desc desc;
 462         int              rv;
 463         desc.tfm   = tfm;
 464         desc.flags = 0;
 465         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 466         if (rv) {
 467                 CERROR("failed to hash setkey: %d\n", rv);
 468                 return rv;
 469         }
 470         return crypto_hash_digest(&desc, sg, size, result);
 471 }
 472 static inline
 473 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 474 {
 475         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 476 }
 477 static inline
 478 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 479 {
 480         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 481 }
 482
 483 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 484 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 485 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 486 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 487 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 488 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 489 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 490 #include <linux/scatterlist.h>
 491 #define ll_crypto_hash          crypto_tfm
 492 #define ll_crypto_cipher        crypto_tfm
 493 #ifndef HAVE_STRUCT_HASH_DESC
 494 struct hash_desc {
 495         struct ll_crypto_hash *tfm;
 496         u32                    flags;
 497 };
 498 #endif
 499 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 500 struct blkcipher_desc {
 501         struct ll_crypto_cipher *tfm;
 502         void                    *info;
 503         u32                      flags;
 504 };
 505 #endif
 506 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 507         crypto_cipher_setkey(tfm, key, keylen)
 508 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 509         crypto_cipher_set_iv(tfm, src, len)
 510 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 511         crypto_cipher_get_iv(tfm, dst, len)
 512 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 513         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 514 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 515         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 516 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 517         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 518 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 519         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 520
 521 static inline
 522 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 523                                                    u32 type, u32 mask)
 524 {
 525         struct ll_crypto_cipher *rtn;
 526         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 527         const char              *pan = algname;
 528         u32                      flag = 0;
 529
 530         if (strncmp("cbc(", algname, 4) == 0)
 531                 flag |= CRYPTO_TFM_MODE_CBC;
 532         else if (strncmp("ecb(", algname, 4) == 0)
 533                 flag |= CRYPTO_TFM_MODE_ECB;
 534         if (flag) {
 535                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 536                 if (vp) {
 537                         memcpy(buf, algname + 4, vp - algname - 4);
 538                         buf[vp - algname - 4] = '\0';
 539                         pan = buf;
 540                 } else {
 541                         flag = 0;
 542                 }
 543         }
 544         rtn = crypto_alloc_tfm(pan, flag);
 545         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 546 }
 547
 548 static inline
 549 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 550 {
 551         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 552         const char *pan = alg;
 553
 554         if (strncmp("hmac(", alg, 5) == 0) {
 555                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 556                 if (vp) {
 557                         memcpy(buf, alg+ 5, vp - alg- 5);
 558                         buf[vp - alg - 5] = 0x00;
 559                         pan = buf;
 560                 }
 561         }
 562         return crypto_alloc_tfm(pan, 0);
 563 }
 564 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 565 {
 566        crypto_digest_init(desc->tfm); return 0;
 567 }
 568 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 569                                         struct scatterlist *sg,
 570                                         unsigned int nbytes)
 571 {
 572         struct scatterlist *sl = sg;
 573         unsigned int        count;
 574                 /*
 575                  * This way is very weakness. We must ensure that
 576                  * the sum of sg[0..i]->length isn't greater than nbytes.
 577                  * In the upstream kernel the crypto_hash_update() also
 578                  * via the nbytes computed the count of sg[...].
 579                  * The old style is more safely. but it gone.
 580                  */
 581         for (count = 0; nbytes > 0; count ++, sl ++) {
 582                 nbytes -= sl->length;
 583         }
 584         crypto_digest_update(desc->tfm, sg, count); return 0;
 585 }
 586 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 587 {
 588         crypto_digest_final(desc->tfm, out); return 0;
 589 }
 590 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 591                                  u8 *key, unsigned int *keylen,
 592                                  struct scatterlist *sg,
 593                                  unsigned int nbytes,
 594                                  u8 *out)
 595 {
 596         struct scatterlist *sl = sg;
 597         int                 count;
 598         for (count = 0; nbytes > 0; count ++, sl ++) {
 599                 nbytes -= sl->length;
 600         }
 601         crypto_hmac(tfm, key, keylen, sg, count, out);
 602         return 0;
 603 }
 604
 605 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 606 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 607 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 608 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 609 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 610 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 611 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 612 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 613 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 614 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 615
 616 #ifdef HAVE_FILE_REMOVE_SUID
 617 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 618 #else
 619 # ifdef HAVE_SECURITY_PLUG
 620 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 621 # else
 622 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 623 # endif
 624 #endif
 625
 626 #ifdef HAVE_SECURITY_PLUG
 627 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 628 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 629 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 630 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 631 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 632                 vfs_mknod(dir,entry,mnt,mode,dev)
 633 #define ll_security_inode_unlink(dir,entry,mnt)         \
 634                 security_inode_unlink(dir,entry,mnt)
 635 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 636                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 637 #else
 638 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 639 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 640 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 641 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 642 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 643 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 644 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 645                 vfs_rename(old,old_dir,new,new_dir)
 646 #endif /* HAVE_SECURITY_PLUG */
 647
 648 #ifdef for_each_possible_cpu
 649 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 650 #elif defined(for_each_cpu)
 651 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 652 #endif
 653
 654 #ifdef HAVE_BIO_ENDIO_2ARG
 655 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 656 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 657 #else
 658 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 659 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 660 #endif
 661
 662 #ifdef HAVE_FS_STRUCT_USE_PATH
 663 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 664 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 665 #define cfs_path_put(nd)     path_put(&(nd)->path)
 666 #else
 667 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 668 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 669 #define cfs_path_put(nd)     path_release(nd)
 670 #endif
 671
 672 #ifndef abs
 673 static inline int abs(int x)
 674 {
 675         return (x < 0) ? -x : x;
 676 }
 677 #endif
 678
 679 #ifndef labs
 680 static inline long labs(long x)
 681 {
 682         return (x < 0) ? -x : x;
 683 }
 684 #endif /* HAVE_REGISTER_SHRINKER */
 685
 686 #ifdef HAVE_INVALIDATE_INODE_PAGES
 687 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 688 #endif
 689
 690 #ifdef HAVE_INODE_IPRIVATE
 691 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 692 #else
 693 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 694 #endif
 695
 696 #ifndef HAVE_SIMPLE_SETATTR
 697 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 698 #endif
 699
 700 #ifndef SLAB_DESTROY_BY_RCU
 701 #define CFS_SLAB_DESTROY_BY_RCU 0
 702 #else
 703 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 704 #endif
 705
 706 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 707 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 708 #else
 709 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 710 #endif
 711
 712 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 713 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 714 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 715 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 716 #else
 717 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 718 #endif
 719
 720 static inline int
 721 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 722 {
 723         int rc;
 724
 725         if (sb->s_qcop->quota_on) {
 726 #ifdef HAVE_QUOTA_ON_USE_PATH
 727                 struct path path;
 728
 729                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 730                 if (!rc)
 731                         return rc;
 732 #endif
 733                 rc = sb->s_qcop->quota_on(sb, off, ver
 734 #ifdef HAVE_QUOTA_ON_USE_PATH
 735                                             , &path
 736 #else
 737                                             , name
 738 #endif
 739 #ifdef HAVE_QUOTA_ON_5ARGS
 740                                             , remount
 741 #endif
 742                                            );
 743 #ifdef HAVE_QUOTA_ON_USE_PATH
 744                 path_put(&path);
 745 #endif
 746                 return rc;
 747         }
 748         else
 749                 return -ENOSYS;
 750 }
 751
 752 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 753 {
 754         if (sb->s_qcop->quota_off) {
 755                 return sb->s_qcop->quota_off(sb, off
 756 #ifdef HAVE_QUOTA_OFF_3ARGS
 757                                              , remount
 758 #endif
 759                                             );
 760         }
 761         else
 762                 return -ENOSYS;
 763 }
 764
 765 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 766 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 767 #endif
 768
 769 #ifndef HAVE_VFS_DQ_OFF
 770 # define ll_vfs_dq_init             DQUOT_INIT
 771 # define ll_vfs_dq_drop             DQUOT_DROP
 772 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 773 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 774 #else
 775 # define ll_vfs_dq_init             vfs_dq_init
 776 # define ll_vfs_dq_drop             vfs_dq_drop
 777 # define ll_vfs_dq_transfer         vfs_dq_transfer
 778 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 779 #endif
 780
 781 #ifdef HAVE_BDI_INIT
 782 #define ll_bdi_init(bdi)    bdi_init(bdi)
 783 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 784 #else
 785 #define ll_bdi_init(bdi)    0
 786 #define ll_bdi_destroy(bdi) do { } while(0)
 787 #endif
 788
 789 #ifdef HAVE_NEW_BACKING_DEV_INFO
 790 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 791 #else
 792 # define ll_bdi_wb_cnt(bdi) 1
 793 #endif
 794
 795 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 796 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 797 #endif
 798
 799 #ifndef HAVE_BLKDEV_GET_BY_DEV
 800 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 801 #endif
 802
 803 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 804 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 805 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 806 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 807 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 808 #endif
 809
 810 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 811 #define blk_queue_max_segments(rq, seg)                      \
 812         do { blk_queue_max_phys_segments(rq, seg);           \
 813              blk_queue_max_hw_segments(rq, seg); } while (0)
 814 #else
 815 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 816 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 817 #endif
 818
 819
 820 #ifndef HAVE_BI_HW_SEGMENTS
 821 #define bio_hw_segments(q, bio) 0
 822 #endif
 823
 824 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 825 #define pagevec_lru_add_file pagevec_lru_add
 826 #endif
 827
 828 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 829 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 830         add_to_page_cache_lru(pg, mapping, off, gfp)
 831 #define ll_pagevec_init(pv, cold)       do {} while (0)
 832 #define ll_pagevec_add(pv, pg)          (0)
 833 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 834 #else
 835 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 836         add_to_page_cache(pg, mapping, off, gfp)
 837 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 838 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 839 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 840 #endif
 841
 842 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 843 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 844 #define HAVE_NODE_TO_CPUMASK
 845 #endif
 846
 847 #ifndef QUOTA_OK
 848 # define QUOTA_OK 0
 849 #endif
 850 #ifndef NO_QUOTA
 851 # define NO_QUOTA (-EDQUOT)
 852 #endif
 853
 854 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 855 # define ext2_set_bit             __test_and_set_bit_le
 856 # define ext2_clear_bit           __test_and_clear_bit_le
 857 # define ext2_test_bit            test_bit_le
 858 # define ext2_find_first_zero_bit find_first_zero_bit_le
 859 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 860 #endif
 861
 862 #ifdef ATTR_TIMES_SET
 863 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 864 #else
 865 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 866 #endif
 867
 868 #ifndef HAVE_SELINUX_IS_ENABLED
 869 static inline bool selinux_is_enabled(void)
 870 {
 871         return 0;
 872 }
 873 #endif
 874
 875 #endif /* __KERNEL__ */
 876 #endif /* _COMPAT25_H */