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 LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 125 #define d_child d_u.d_child
 126 #define d_rcu d_u.d_rcu
 127 #endif
 128
 129 #define current_ngroups current_cred()->group_info->ngroups
 130 #define current_groups current_cred()->group_info->small_block
 131
 132 #ifndef page_private
 133 #define page_private(page) ((page)->private)
 134 #define set_page_private(page, v) ((page)->private = (v))
 135 #endif
 136
 137 #define ll_kernel_locked()      kernel_locked()
 138
 139 /*
 140  * OBD need working random driver, thus all our
 141  * initialization routines must be called after device
 142  * driver initialization
 143  */
 144 #ifndef MODULE
 145 #undef module_init
 146 #define module_init(a)     late_initcall(a)
 147 #endif
 148
 149 /* XXX our code should be using the 2.6 calls, not the other way around */
 150 #ifdef HAVE_TRYLOCK_PAGE
 151 #define TestSetPageLocked(page)         (!trylock_page(page))
 152 #endif
 153
 154 #define Page_Uptodate(page)             PageUptodate(page)
 155 #define ll_redirty_page(page)           set_page_dirty(page)
 156
 157 #define KDEVT_INIT(val)                 (val)
 158
 159 #define LTIME_S(time)                   (time.tv_sec)
 160 #define ll_path_lookup                  path_lookup
 161
 162 #ifdef HAVE_EXPORT_INODE_PERMISSION
 163 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 164 #else
 165 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 166 #endif
 167
 168 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 169 #define ll_generic_permission(inode, mask, flags, check_acl) \
 170         generic_permission(inode, mask, flags, check_acl)
 171 #else
 172 #define ll_generic_permission(inode, mask, flags, check_acl) \
 173         generic_permission(inode, mask, check_acl)
 174 #endif
 175
 176 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 177 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 178 #define ll_call_writepage(inode, page)  \
 179                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 180 #define ll_invalidate_inode_pages(inode) \
 181                                 invalidate_inode_pages((inode)->i_mapping)
 182
 183 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 184 #define ll_dev_t                        dev_t
 185 #define kdev_t                          dev_t
 186 #define to_kdev_t(dev)                  (dev)
 187 #define kdev_t_to_nr(dev)               (dev)
 188 #define val_to_kdev(dev)                (dev)
 189
 190 #ifdef HAVE_BLKDEV_PUT_2ARGS
 191 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 192 #else
 193 #define ll_blkdev_put(a, b) blkdev_put(a)
 194 #endif
 195
 196 #ifdef HAVE_DENTRY_OPEN_4ARGS
 197 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 198 #else
 199 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 200 #endif
 201
 202 #include <linux/writeback.h>
 203
 204 static inline int cfs_cleanup_group_info(void)
 205 {
 206         struct group_info *ginfo;
 207
 208         ginfo = groups_alloc(0);
 209         if (!ginfo)
 210                 return -ENOMEM;
 211
 212         set_current_groups(ginfo);
 213         put_group_info(ginfo);
 214
 215         return 0;
 216 }
 217
 218 #define __set_page_ll_data(page, llap) \
 219         do {       \
 220                 page_cache_get(page); \
 221                 SetPagePrivate(page); \
 222                 set_page_private(page, (unsigned long)llap); \
 223         } while (0)
 224 #define __clear_page_ll_data(page) \
 225         do {       \
 226                 ClearPagePrivate(page); \
 227                 set_page_private(page, 0); \
 228                 page_cache_release(page); \
 229         } while(0)
 230
 231 #define kiobuf bio
 232
 233 #include <linux/proc_fs.h>
 234
 235 #define CheckWriteback(page, cmd) \
 236         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 237          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 238
 239 #ifdef HAVE_PAGE_LIST
 240 static inline int mapping_has_pages(struct address_space *mapping)
 241 {
 242         int rc = 1;
 243
 244         ll_pgcache_lock(mapping);
 245         if (cfs_list_empty(&mapping->dirty_pages) &&
 246             cfs_list_empty(&mapping->clean_pages) &&
 247             cfs_list_empty(&mapping->locked_pages)) {
 248                 rc = 0;
 249         }
 250         ll_pgcache_unlock(mapping);
 251
 252         return rc;
 253 }
 254 #else
 255 static inline int mapping_has_pages(struct address_space *mapping)
 256 {
 257         return mapping->nrpages > 0;
 258 }
 259 #endif
 260
 261 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 262 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 263 #else
 264 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 265 #endif
 266
 267 #ifdef HAVE_SECURITY_PLUG
 268 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 269                 vfs_symlink(dir, dentry, mnt, path, mode)
 270 #else
 271 #ifdef HAVE_4ARGS_VFS_SYMLINK
 272 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 273                 vfs_symlink(dir, dentry, path, mode)
 274 #else
 275 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 276                        vfs_symlink(dir, dentry, path)
 277 #endif
 278
 279 #endif
 280
 281 #ifndef container_of
 282 #define container_of(ptr, type, member) ({                      \
 283                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 284                 (type *)( (char *)__mptr - offsetof(type,member) );})
 285 #endif
 286
 287 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 288 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 289 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 290
 291 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 292 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 293 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 294
 295 #include <linux/mpage.h>        /* for generic_writepages */
 296
 297 #ifndef HAVE_ATOMIC_MNT_COUNT
 298 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 299 {
 300 #ifdef CONFIG_SMP
 301         unsigned int count = 0;
 302         int cpu;
 303
 304         for_each_possible_cpu(cpu) {
 305                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 306         }
 307
 308         return count;
 309 #else
 310         return mnt->mnt_count;
 311 #endif
 312 }
 313 #else
 314 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 315 #endif
 316
 317 #ifdef HAVE_STATFS_DENTRY_PARAM
 318 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 319 #else
 320 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 321 #endif
 322
 323 #ifdef HAVE_RW_TREE_LOCK
 324 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 325 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 326 #else
 327 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 328 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 329 #endif
 330
 331 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 332 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 333 #else
 334 static inline
 335 int ll_unregister_blkdev(unsigned int dev, const char *name)
 336 {
 337         unregister_blkdev(dev, name);
 338         return 0;
 339 }
 340 #endif
 341
 342 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 343 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 344 #else
 345 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 346 #endif
 347
 348 #ifdef HAVE_INODE_BLKSIZE
 349 #define ll_inode_blksize(a)     (a)->i_blksize
 350 #else
 351 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 352 #endif
 353
 354 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 355 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 356 #else
 357 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 358 #endif
 359
 360 #ifndef HAVE_D_OBTAIN_ALIAS
 361 /* The old d_alloc_anon() didn't free the inode reference on error
 362  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 363 static inline struct dentry *d_obtain_alias(struct inode *inode)
 364 {
 365         struct dentry *anon = d_alloc_anon(inode);
 366
 367         if (anon == NULL) {
 368                 iput(inode);
 369                 anon = ERR_PTR(-ENOMEM);
 370         }
 371
 372         return anon;
 373 }
 374 #endif
 375
 376 /* add a lustre compatible layer for crypto API */
 377 #include <linux/crypto.h>
 378 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 379 #define ll_crypto_hash          crypto_hash
 380 #define ll_crypto_cipher        crypto_blkcipher
 381 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 382 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 383 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 384 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 385 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 386 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 387                 crypto_blkcipher_setkey(tfm, key, keylen)
 388 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 389                 crypto_blkcipher_set_iv(tfm, src, len)
 390 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 391                 crypto_blkcipher_get_iv(tfm, dst, len)
 392 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 393                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 394 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 395                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 396 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 397                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 398 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 399                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 400
 401 static inline
 402 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 403                                                    u32 type, u32 mask)
 404 {
 405         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 406
 407         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 408 }
 409
 410 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 411                                  u8 *key, unsigned int *keylen,
 412                                  struct scatterlist *sg,
 413                                  unsigned int size, u8 *result)
 414 {
 415         struct hash_desc desc;
 416         int              rv;
 417         desc.tfm   = tfm;
 418         desc.flags = 0;
 419         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 420         if (rv) {
 421                 CERROR("failed to hash setkey: %d\n", rv);
 422                 return rv;
 423         }
 424         return crypto_hash_digest(&desc, sg, size, result);
 425 }
 426 static inline
 427 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 428 {
 429         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 430 }
 431 static inline
 432 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 433 {
 434         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 435 }
 436
 437 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 438 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 439 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 440 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 441 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 442 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 443 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 444 #include <linux/scatterlist.h>
 445 #define ll_crypto_hash          crypto_tfm
 446 #define ll_crypto_cipher        crypto_tfm
 447 #ifndef HAVE_STRUCT_HASH_DESC
 448 struct hash_desc {
 449         struct ll_crypto_hash *tfm;
 450         u32                    flags;
 451 };
 452 #endif
 453 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 454 struct blkcipher_desc {
 455         struct ll_crypto_cipher *tfm;
 456         void                    *info;
 457         u32                      flags;
 458 };
 459 #endif
 460 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 461         crypto_cipher_setkey(tfm, key, keylen)
 462 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 463         crypto_cipher_set_iv(tfm, src, len)
 464 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 465         crypto_cipher_get_iv(tfm, dst, len)
 466 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 467         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 468 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 469         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 470 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 471         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 472 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 473         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 474
 475 static inline
 476 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 477                                                    u32 type, u32 mask)
 478 {
 479         struct ll_crypto_cipher *rtn;
 480         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 481         const char              *pan = algname;
 482         u32                      flag = 0;
 483
 484         if (strncmp("cbc(", algname, 4) == 0)
 485                 flag |= CRYPTO_TFM_MODE_CBC;
 486         else if (strncmp("ecb(", algname, 4) == 0)
 487                 flag |= CRYPTO_TFM_MODE_ECB;
 488         if (flag) {
 489                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 490                 if (vp) {
 491                         memcpy(buf, algname + 4, vp - algname - 4);
 492                         buf[vp - algname - 4] = '\0';
 493                         pan = buf;
 494                 } else {
 495                         flag = 0;
 496                 }
 497         }
 498         rtn = crypto_alloc_tfm(pan, flag);
 499         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 500 }
 501
 502 static inline
 503 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 504 {
 505         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 506         const char *pan = alg;
 507
 508         if (strncmp("hmac(", alg, 5) == 0) {
 509                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 510                 if (vp) {
 511                         memcpy(buf, alg+ 5, vp - alg- 5);
 512                         buf[vp - alg - 5] = 0x00;
 513                         pan = buf;
 514                 }
 515         }
 516         return crypto_alloc_tfm(pan, 0);
 517 }
 518 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 519 {
 520        crypto_digest_init(desc->tfm); return 0;
 521 }
 522 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 523                                         struct scatterlist *sg,
 524                                         unsigned int nbytes)
 525 {
 526         struct scatterlist *sl = sg;
 527         unsigned int        count;
 528                 /*
 529                  * This way is very weakness. We must ensure that
 530                  * the sum of sg[0..i]->length isn't greater than nbytes.
 531                  * In the upstream kernel the crypto_hash_update() also
 532                  * via the nbytes computed the count of sg[...].
 533                  * The old style is more safely. but it gone.
 534                  */
 535         for (count = 0; nbytes > 0; count ++, sl ++) {
 536                 nbytes -= sl->length;
 537         }
 538         crypto_digest_update(desc->tfm, sg, count); return 0;
 539 }
 540 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 541 {
 542         crypto_digest_final(desc->tfm, out); return 0;
 543 }
 544 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 545                                  u8 *key, unsigned int *keylen,
 546                                  struct scatterlist *sg,
 547                                  unsigned int nbytes,
 548                                  u8 *out)
 549 {
 550         struct scatterlist *sl = sg;
 551         int                 count;
 552         for (count = 0; nbytes > 0; count ++, sl ++) {
 553                 nbytes -= sl->length;
 554         }
 555         crypto_hmac(tfm, key, keylen, sg, count, out);
 556         return 0;
 557 }
 558
 559 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 560 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 561 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 562 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 563 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 564 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 565 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 566 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 567 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 568 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 569
 570 #ifdef HAVE_FILE_REMOVE_SUID
 571 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 572 #else
 573 # ifdef HAVE_SECURITY_PLUG
 574 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 575 # else
 576 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 577 # endif
 578 #endif
 579
 580 #ifdef HAVE_SECURITY_PLUG
 581 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 582 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 583 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 584 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 585 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 586                 vfs_mknod(dir,entry,mnt,mode,dev)
 587 #define ll_security_inode_unlink(dir,entry,mnt)         \
 588                 security_inode_unlink(dir,entry,mnt)
 589 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 590                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 591 #else
 592 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 593 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 594 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 595 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 596 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 597 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 598 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 599                 vfs_rename(old,old_dir,new,new_dir)
 600 #endif /* HAVE_SECURITY_PLUG */
 601
 602 #ifdef for_each_possible_cpu
 603 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 604 #elif defined(for_each_cpu)
 605 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 606 #endif
 607
 608 #ifdef HAVE_BIO_ENDIO_2ARG
 609 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 610 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 611 #else
 612 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 613 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 614 #endif
 615
 616 #ifdef HAVE_FS_STRUCT_USE_PATH
 617 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 618 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 619 #define cfs_path_put(nd)     path_put(&(nd)->path)
 620 #else
 621 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 622 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 623 #define cfs_path_put(nd)     path_release(nd)
 624 #endif
 625
 626 #ifndef abs
 627 static inline int abs(int x)
 628 {
 629         return (x < 0) ? -x : x;
 630 }
 631 #endif
 632
 633 #ifndef labs
 634 static inline long labs(long x)
 635 {
 636         return (x < 0) ? -x : x;
 637 }
 638 #endif /* HAVE_REGISTER_SHRINKER */
 639
 640 #ifdef HAVE_INVALIDATE_INODE_PAGES
 641 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 642 #endif
 643
 644 #ifndef HAVE_SIMPLE_SETATTR
 645 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 646 #endif
 647
 648 #ifndef SLAB_DESTROY_BY_RCU
 649 #define CFS_SLAB_DESTROY_BY_RCU 0
 650 #else
 651 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 652 #endif
 653
 654 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 655 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 656 #else
 657 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 658 #endif
 659
 660 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 661 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 662 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 663 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 664 #else
 665 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 666 #endif
 667
 668 static inline int
 669 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 670 {
 671         int rc;
 672
 673         if (sb->s_qcop->quota_on) {
 674 #ifdef HAVE_QUOTA_ON_USE_PATH
 675                 struct path path;
 676
 677                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 678                 if (!rc)
 679                         return rc;
 680 #endif
 681                 rc = sb->s_qcop->quota_on(sb, off, ver
 682 #ifdef HAVE_QUOTA_ON_USE_PATH
 683                                             , &path
 684 #else
 685                                             , name
 686 #endif
 687 #ifdef HAVE_QUOTA_ON_5ARGS
 688                                             , remount
 689 #endif
 690                                            );
 691 #ifdef HAVE_QUOTA_ON_USE_PATH
 692                 path_put(&path);
 693 #endif
 694                 return rc;
 695         }
 696         else
 697                 return -ENOSYS;
 698 }
 699
 700 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 701 {
 702         if (sb->s_qcop->quota_off) {
 703                 return sb->s_qcop->quota_off(sb, off
 704 #ifdef HAVE_QUOTA_OFF_3ARGS
 705                                              , remount
 706 #endif
 707                                             );
 708         }
 709         else
 710                 return -ENOSYS;
 711 }
 712
 713 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 714 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 715 #endif
 716
 717 #ifndef HAVE_VFS_DQ_OFF
 718 # define ll_vfs_dq_init             DQUOT_INIT
 719 # define ll_vfs_dq_drop             DQUOT_DROP
 720 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 721 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 722 #else
 723 # define ll_vfs_dq_init             vfs_dq_init
 724 # define ll_vfs_dq_drop             vfs_dq_drop
 725 # define ll_vfs_dq_transfer         vfs_dq_transfer
 726 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 727 #endif
 728
 729 #ifdef HAVE_BDI_INIT
 730 #define ll_bdi_init(bdi)    bdi_init(bdi)
 731 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 732 #else
 733 #define ll_bdi_init(bdi)    0
 734 #define ll_bdi_destroy(bdi) do { } while(0)
 735 #endif
 736
 737 #ifdef HAVE_NEW_BACKING_DEV_INFO
 738 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 739 #else
 740 # define ll_bdi_wb_cnt(bdi) 1
 741 #endif
 742
 743 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 744 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 745 #endif
 746
 747 #ifndef HAVE_BLKDEV_GET_BY_DEV
 748 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 749 #endif
 750
 751 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 752 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 753 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 754 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 755 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 756 #endif
 757
 758 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 759 #define blk_queue_max_segments(rq, seg)                      \
 760         do { blk_queue_max_phys_segments(rq, seg);           \
 761              blk_queue_max_hw_segments(rq, seg); } while (0)
 762 #else
 763 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 764 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 765 #endif
 766
 767
 768 #ifndef HAVE_BI_HW_SEGMENTS
 769 #define bio_hw_segments(q, bio) 0
 770 #endif
 771
 772 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 773 #define pagevec_lru_add_file pagevec_lru_add
 774 #endif
 775
 776 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 777 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 778         add_to_page_cache_lru(pg, mapping, off, gfp)
 779 #define ll_pagevec_init(pv, cold)       do {} while (0)
 780 #define ll_pagevec_add(pv, pg)          (0)
 781 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 782 #else
 783 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 784         add_to_page_cache(pg, mapping, off, gfp)
 785 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 786 #define ll_pagevec_add(pv, pg)                                  \
 787 ({                                                              \
 788         int __ret;                                              \
 789                                                                 \
 790         page_cache_get(pg);                                     \
 791         __ret = pagevec_add(pv, pg);                            \
 792 })
 793 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 794 #endif
 795
 796 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 797 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 798 #define HAVE_NODE_TO_CPUMASK
 799 #endif
 800
 801 #ifndef QUOTA_OK
 802 # define QUOTA_OK 0
 803 #endif
 804 #ifndef NO_QUOTA
 805 # define NO_QUOTA (-EDQUOT)
 806 #endif
 807
 808 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 809 # define ext2_set_bit             __test_and_set_bit_le
 810 # define ext2_clear_bit           __test_and_clear_bit_le
 811 # define ext2_test_bit            test_bit_le
 812 # define ext2_find_first_zero_bit find_first_zero_bit_le
 813 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 814 #endif
 815
 816 #ifdef ATTR_TIMES_SET
 817 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 818 #else
 819 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 820 #endif
 821
 822 #ifndef HAVE_SELINUX_IS_ENABLED
 823 static inline bool selinux_is_enabled(void)
 824 {
 825         return 0;
 826 }
 827 #endif
 828
 829 #endif /* __KERNEL__ */
 830 #endif /* _COMPAT25_H */