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  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  */
  38
  39 #ifndef _LINUX_COMPAT25_H
  40 #define _LINUX_COMPAT25_H
  41
  42 #ifdef __KERNEL__
  43
  44 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  45 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  46 #endif
  47
  48 #include <linux/fs_struct.h>
  49 #include <linux/namei.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_RWLOCK
  72 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  73 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  74 #else
  75 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  76 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  77 #endif
  78
  79 #ifdef HAVE_FS_STRUCT_USE_PATH
  80 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  81                                  struct dentry *dentry)
  82 {
  83         struct path path;
  84         struct path old_pwd;
  85
  86         path.mnt = mnt;
  87         path.dentry = dentry;
  88         LOCK_FS_STRUCT(fs);
  89         old_pwd = fs->pwd;
  90         path_get(&path);
  91         fs->pwd = path;
  92         UNLOCK_FS_STRUCT(fs);
  93
  94         if (old_pwd.dentry)
  95                 path_put(&old_pwd);
  96 }
  97
  98 #else
  99
 100 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
 101                 struct dentry *dentry)
 102 {
 103         struct dentry *old_pwd;
 104         struct vfsmount *old_pwdmnt;
 105
 106         LOCK_FS_STRUCT(fs);
 107         old_pwd = fs->pwd;
 108         old_pwdmnt = fs->pwdmnt;
 109         fs->pwdmnt = mntget(mnt);
 110         fs->pwd = dget(dentry);
 111         UNLOCK_FS_STRUCT(fs);
 112
 113         if (old_pwd) {
 114                 dput(old_pwd);
 115                 mntput(old_pwdmnt);
 116         }
 117 }
 118 #endif
 119
 120 /*
 121  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 122  * ATTR_* attributes (see bug 13828)
 123  */
 124 #define ATTR_BLOCKS    (1 << 27)
 125
 126 #if HAVE_INODE_I_MUTEX
 127 #define UNLOCK_INODE_MUTEX(inode) \
 128 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 129 #define LOCK_INODE_MUTEX(inode) \
 130 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 131 #define LOCK_INODE_MUTEX_PARENT(inode) \
 132 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 133 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 134 #else
 135 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 136 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 137 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 138 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 139 #endif /* HAVE_INODE_I_MUTEX */
 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 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 163 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 164
 165 #define ll_kernel_locked()      kernel_locked()
 166
 167 /*
 168  * OBD need working random driver, thus all our
 169  * initialization routines must be called after device
 170  * driver initialization
 171  */
 172 #ifndef MODULE
 173 #undef module_init
 174 #define module_init(a)     late_initcall(a)
 175 #endif
 176
 177 /* XXX our code should be using the 2.6 calls, not the other way around */
 178 #ifdef HAVE_TRYLOCK_PAGE
 179 #define TestSetPageLocked(page)         (!trylock_page(page))
 180 #endif
 181
 182 #define Page_Uptodate(page)             PageUptodate(page)
 183 #define ll_redirty_page(page)           set_page_dirty(page)
 184
 185 #define KDEVT_INIT(val)                 (val)
 186
 187 #define LTIME_S(time)                   (time.tv_sec)
 188 #define ll_path_lookup                  path_lookup
 189
 190 #ifdef HAVE_EXPORT_INODE_PERMISSION
 191 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 192 #else
 193 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 194 #endif
 195
 196 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 197 #define ll_generic_permission(inode, mask, flags, check_acl) \
 198         generic_permission(inode, mask, flags, check_acl)
 199 #else
 200 #define ll_generic_permission(inode, mask, flags, check_acl) \
 201         generic_permission(inode, mask, check_acl)
 202 #endif
 203
 204 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 205 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 206 #define ll_call_writepage(inode, page)  \
 207                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 208 #define ll_invalidate_inode_pages(inode) \
 209                                 invalidate_inode_pages((inode)->i_mapping)
 210
 211 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 212 #define ll_dev_t                        dev_t
 213 #define kdev_t                          dev_t
 214 #define to_kdev_t(dev)                  (dev)
 215 #define kdev_t_to_nr(dev)               (dev)
 216 #define val_to_kdev(dev)                (dev)
 217
 218 #ifdef HAVE_BLKDEV_PUT_2ARGS
 219 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 220 #else
 221 #define ll_blkdev_put(a, b) blkdev_put(a)
 222 #endif
 223
 224 #ifdef HAVE_DENTRY_OPEN_4ARGS
 225 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 226 #else
 227 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 228 #endif
 229
 230 #include <linux/writeback.h>
 231
 232 static inline int cfs_cleanup_group_info(void)
 233 {
 234         struct group_info *ginfo;
 235
 236         ginfo = groups_alloc(0);
 237         if (!ginfo)
 238                 return -ENOMEM;
 239
 240         set_current_groups(ginfo);
 241         put_group_info(ginfo);
 242
 243         return 0;
 244 }
 245
 246 #define __set_page_ll_data(page, llap) \
 247         do {       \
 248                 page_cache_get(page); \
 249                 SetPagePrivate(page); \
 250                 set_page_private(page, (unsigned long)llap); \
 251         } while (0)
 252 #define __clear_page_ll_data(page) \
 253         do {       \
 254                 ClearPagePrivate(page); \
 255                 set_page_private(page, 0); \
 256                 page_cache_release(page); \
 257         } while(0)
 258
 259 #define kiobuf bio
 260
 261 #include <linux/proc_fs.h>
 262
 263 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 264 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 265 extern void __d_rehash(struct dentry *dentry, int lock);
 266 #endif
 267
 268 #define CheckWriteback(page, cmd) \
 269         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 270          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 271
 272 #ifdef HAVE_PAGE_LIST
 273 static inline int mapping_has_pages(struct address_space *mapping)
 274 {
 275         int rc = 1;
 276
 277         ll_pgcache_lock(mapping);
 278         if (cfs_list_empty(&mapping->dirty_pages) &&
 279             cfs_list_empty(&mapping->clean_pages) &&
 280             cfs_list_empty(&mapping->locked_pages)) {
 281                 rc = 0;
 282         }
 283         ll_pgcache_unlock(mapping);
 284
 285         return rc;
 286 }
 287 #else
 288 static inline int mapping_has_pages(struct address_space *mapping)
 289 {
 290         return mapping->nrpages > 0;
 291 }
 292 #endif
 293
 294 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 295 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 296 #else
 297 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 298 #endif
 299
 300 #ifdef HAVE_SECURITY_PLUG
 301 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 302                 vfs_symlink(dir, dentry, mnt, path, mode)
 303 #else
 304 #ifdef HAVE_4ARGS_VFS_SYMLINK
 305 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 306                 vfs_symlink(dir, dentry, path, mode)
 307 #else
 308 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 309                        vfs_symlink(dir, dentry, path)
 310 #endif
 311
 312 #define ll_set_dflags(dentry, flags) do { \
 313                 cfs_spin_lock(&dentry->d_lock); \
 314                 dentry->d_flags |= flags; \
 315                 cfs_spin_unlock(&dentry->d_lock); \
 316         } while(0)
 317 #endif
 318
 319 #ifndef container_of
 320 #define container_of(ptr, type, member) ({                      \
 321                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 322                 (type *)( (char *)__mptr - offsetof(type,member) );})
 323 #endif
 324
 325 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 326 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 327 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 328
 329 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 330 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 331 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 332
 333 #include <linux/mpage.h>        /* for generic_writepages */
 334
 335 #ifndef HAVE_ATOMIC_MNT_COUNT
 336 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 337 {
 338 #ifdef CONFIG_SMP
 339         unsigned int count = 0;
 340         int cpu;
 341
 342         for_each_possible_cpu(cpu) {
 343                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 344         }
 345
 346         return count;
 347 #else
 348         return mnt->mnt_count;
 349 #endif
 350 }
 351 #else
 352 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 353 #endif
 354
 355 #ifdef HAVE_STATFS_DENTRY_PARAM
 356 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 357 #else
 358 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 359 #endif
 360
 361 #ifndef HAVE_SB_TIME_GRAN
 362 #ifndef HAVE_S_TIME_GRAN
 363 #error Need s_time_gran patch!
 364 #endif
 365 static inline u32 get_sb_time_gran(struct super_block *sb)
 366 {
 367         return sb->s_time_gran;
 368 }
 369 #endif
 370
 371 #ifdef HAVE_RW_TREE_LOCK
 372 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 373 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 374 #else
 375 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 376 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 377 #endif
 378
 379 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 380 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 381 #else
 382 static inline
 383 int ll_unregister_blkdev(unsigned int dev, const char *name)
 384 {
 385         unregister_blkdev(dev, name);
 386         return 0;
 387 }
 388 #endif
 389
 390 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 391 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 392 #else
 393 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 394 #endif
 395
 396 #ifdef HAVE_INODE_BLKSIZE
 397 #define ll_inode_blksize(a)     (a)->i_blksize
 398 #else
 399 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 400 #endif
 401
 402 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 403 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 404 #else
 405 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 406 #endif
 407
 408 #ifndef HAVE_D_OBTAIN_ALIAS
 409 /* The old d_alloc_anon() didn't free the inode reference on error
 410  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 411 static inline struct dentry *d_obtain_alias(struct inode *inode)
 412 {
 413         struct dentry *anon = d_alloc_anon(inode);
 414
 415         if (anon == NULL) {
 416                 iput(inode);
 417                 anon = ERR_PTR(-ENOMEM);
 418         }
 419
 420         return anon;
 421 }
 422 #endif
 423
 424 /* add a lustre compatible layer for crypto API */
 425 #include <linux/crypto.h>
 426 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 427 #define ll_crypto_hash          crypto_hash
 428 #define ll_crypto_cipher        crypto_blkcipher
 429 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 430 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 431 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 432 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 433 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 434 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 435                 crypto_alloc_blkcipher(name ,type, mask)
 436 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 437                 crypto_blkcipher_setkey(tfm, key, keylen)
 438 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 439                 crypto_blkcipher_set_iv(tfm, src, len)
 440 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 441                 crypto_blkcipher_get_iv(tfm, dst, len)
 442 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 443                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 444 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 445                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 446 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 447                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 448 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 449                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 450
 451 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 452                                  u8 *key, unsigned int *keylen,
 453                                  struct scatterlist *sg,
 454                                  unsigned int size, u8 *result)
 455 {
 456         struct hash_desc desc;
 457         int              rv;
 458         desc.tfm   = tfm;
 459         desc.flags = 0;
 460         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 461         if (rv) {
 462                 CERROR("failed to hash setkey: %d\n", rv);
 463                 return rv;
 464         }
 465         return crypto_hash_digest(&desc, sg, size, result);
 466 }
 467 static inline
 468 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 469 {
 470         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 471 }
 472 static inline
 473 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 474 {
 475         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 476 }
 477
 478 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 479 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 480 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 481 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 482 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 483 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 484 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 485 #include <linux/scatterlist.h>
 486 #define ll_crypto_hash          crypto_tfm
 487 #define ll_crypto_cipher        crypto_tfm
 488 #ifndef HAVE_STRUCT_HASH_DESC
 489 struct hash_desc {
 490         struct ll_crypto_hash *tfm;
 491         u32                    flags;
 492 };
 493 #endif
 494 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 495 struct blkcipher_desc {
 496         struct ll_crypto_cipher *tfm;
 497         void                    *info;
 498         u32                      flags;
 499 };
 500 #endif
 501 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 502         crypto_cipher_setkey(tfm, key, keylen)
 503 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 504         crypto_cipher_set_iv(tfm, src, len)
 505 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 506         crypto_cipher_get_iv(tfm, dst, len)
 507 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 508         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 509 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 510         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 511 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 512         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 513 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 514         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 515
 516 static inline
 517 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 518                                                    u32 type, u32 mask)
 519 {
 520         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 521         const char *pan = algname;
 522         u32         flag = 0;
 523
 524         if (strncmp("cbc(", algname, 4) == 0)
 525                 flag |= CRYPTO_TFM_MODE_CBC;
 526         else if (strncmp("ecb(", algname, 4) == 0)
 527                 flag |= CRYPTO_TFM_MODE_ECB;
 528         if (flag) {
 529                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 530                 if (vp) {
 531                         memcpy(buf, algname + 4, vp - algname - 4);
 532                         buf[vp - algname - 4] = '\0';
 533                         pan = buf;
 534                 } else {
 535                         flag = 0;
 536                 }
 537         }
 538         return crypto_alloc_tfm(pan, flag);
 539 }
 540
 541 static inline
 542 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 543 {
 544         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 545         const char *pan = alg;
 546
 547         if (strncmp("hmac(", alg, 5) == 0) {
 548                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 549                 if (vp) {
 550                         memcpy(buf, alg+ 5, vp - alg- 5);
 551                         buf[vp - alg - 5] = 0x00;
 552                         pan = buf;
 553                 }
 554         }
 555         return crypto_alloc_tfm(pan, 0);
 556 }
 557 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 558 {
 559        crypto_digest_init(desc->tfm); return 0;
 560 }
 561 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 562                                         struct scatterlist *sg,
 563                                         unsigned int nbytes)
 564 {
 565         struct scatterlist *sl = sg;
 566         unsigned int        count;
 567                 /*
 568                  * This way is very weakness. We must ensure that
 569                  * the sum of sg[0..i]->length isn't greater than nbytes.
 570                  * In the upstream kernel the crypto_hash_update() also
 571                  * via the nbytes computed the count of sg[...].
 572                  * The old style is more safely. but it gone.
 573                  */
 574         for (count = 0; nbytes > 0; count ++, sl ++) {
 575                 nbytes -= sl->length;
 576         }
 577         crypto_digest_update(desc->tfm, sg, count); return 0;
 578 }
 579 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 580 {
 581         crypto_digest_final(desc->tfm, out); return 0;
 582 }
 583 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 584                                  u8 *key, unsigned int *keylen,
 585                                  struct scatterlist *sg,
 586                                  unsigned int nbytes,
 587                                  u8 *out)
 588 {
 589         struct scatterlist *sl = sg;
 590         int                 count;
 591         for (count = 0; nbytes > 0; count ++, sl ++) {
 592                 nbytes -= sl->length;
 593         }
 594         crypto_hmac(tfm, key, keylen, sg, count, out);
 595         return 0;
 596 }
 597
 598 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 599 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 600 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 601 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 602 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 603 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 604 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 605 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 606 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 607 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 608
 609 #ifdef HAVE_FILE_REMOVE_SUID
 610 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 611 #else
 612 # ifdef HAVE_SECURITY_PLUG
 613 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 614 # else
 615 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 616 # endif
 617 #endif
 618
 619 #ifdef HAVE_SECURITY_PLUG
 620 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 621 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 622 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 623 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 624 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 625                 vfs_mknod(dir,entry,mnt,mode,dev)
 626 #define ll_security_inode_unlink(dir,entry,mnt)         \
 627                 security_inode_unlink(dir,entry,mnt)
 628 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 629                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 630 #else
 631 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 632 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 633 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 634 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 635 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 636 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 637 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 638                 vfs_rename(old,old_dir,new,new_dir)
 639 #endif /* HAVE_SECURITY_PLUG */
 640
 641 #ifdef for_each_possible_cpu
 642 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 643 #elif defined(for_each_cpu)
 644 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 645 #endif
 646
 647 #ifdef HAVE_BIO_ENDIO_2ARG
 648 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 649 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 650 #else
 651 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 652 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 653 #endif
 654
 655 #ifdef HAVE_FS_STRUCT_USE_PATH
 656 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 657 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 658 #define cfs_path_put(nd)     path_put(&(nd)->path)
 659 #else
 660 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 661 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 662 #define cfs_path_put(nd)     path_release(nd)
 663 #endif
 664
 665 #ifndef abs
 666 static inline int abs(int x)
 667 {
 668         return (x < 0) ? -x : x;
 669 }
 670 #endif
 671
 672 #ifndef labs
 673 static inline long labs(long x)
 674 {
 675         return (x < 0) ? -x : x;
 676 }
 677 #endif /* HAVE_REGISTER_SHRINKER */
 678
 679 #ifdef HAVE_INVALIDATE_INODE_PAGES
 680 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 681 #endif
 682
 683 #ifdef HAVE_INODE_IPRIVATE
 684 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 685 #else
 686 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 687 #endif
 688
 689 #ifndef HAVE_SIMPLE_SETATTR
 690 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 691 #endif
 692
 693 #ifndef SLAB_DESTROY_BY_RCU
 694 #define CFS_SLAB_DESTROY_BY_RCU 0
 695 #else
 696 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 697 #endif
 698
 699 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 700 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 701 #else
 702 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 703 #endif
 704
 705 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 706 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 707 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 708 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 709 #else
 710 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 711 #endif
 712
 713 static inline int
 714 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 715 {
 716         int rc;
 717
 718         if (sb->s_qcop->quota_on) {
 719 #ifdef HAVE_QUOTA_ON_USE_PATH
 720                 struct path path;
 721
 722                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 723                 if (!rc)
 724                         return rc;
 725 #endif
 726                 rc = sb->s_qcop->quota_on(sb, off, ver
 727 #ifdef HAVE_QUOTA_ON_USE_PATH
 728                                             , &path
 729 #else
 730                                             , name
 731 #endif
 732 #ifdef HAVE_QUOTA_ON_5ARGS
 733                                             , remount
 734 #endif
 735                                            );
 736 #ifdef HAVE_QUOTA_ON_USE_PATH
 737                 path_put(&path);
 738 #endif
 739                 return rc;
 740         }
 741         else
 742                 return -ENOSYS;
 743 }
 744
 745 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 746 {
 747         if (sb->s_qcop->quota_off) {
 748                 return sb->s_qcop->quota_off(sb, off
 749 #ifdef HAVE_QUOTA_OFF_3ARGS
 750                                              , remount
 751 #endif
 752                                             );
 753         }
 754         else
 755                 return -ENOSYS;
 756 }
 757
 758 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 759 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 760 #endif
 761
 762 #ifndef HAVE_VFS_DQ_OFF
 763 # define ll_vfs_dq_init             DQUOT_INIT
 764 # define ll_vfs_dq_drop             DQUOT_DROP
 765 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 766 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 767 #else
 768 # define ll_vfs_dq_init             vfs_dq_init
 769 # define ll_vfs_dq_drop             vfs_dq_drop
 770 # define ll_vfs_dq_transfer         vfs_dq_transfer
 771 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 772 #endif
 773
 774 #ifdef HAVE_BDI_INIT
 775 #define ll_bdi_init(bdi)    bdi_init(bdi)
 776 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 777 #else
 778 #define ll_bdi_init(bdi)    0
 779 #define ll_bdi_destroy(bdi) do { } while(0)
 780 #endif
 781
 782 #ifdef HAVE_NEW_BACKING_DEV_INFO
 783 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 784 #else
 785 # define ll_bdi_wb_cnt(bdi) 1
 786 #endif
 787
 788 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 789 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 790 #endif
 791
 792 #ifndef HAVE_BLKDEV_GET_BY_DEV
 793 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 794 #endif
 795
 796 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 797 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 798 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 799 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 800 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 801 #endif
 802
 803 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 804 #define blk_queue_max_segments(rq, seg)                      \
 805         do { blk_queue_max_phys_segments(rq, seg);           \
 806              blk_queue_max_hw_segments(rq, seg); } while (0)
 807 #else
 808 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 809 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 810 #endif
 811
 812
 813 #ifndef HAVE_BI_HW_SEGMENTS
 814 #define bio_hw_segments(q, bio) 0
 815 #endif
 816
 817 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 818 #define pagevec_lru_add_file pagevec_lru_add
 819 #endif
 820
 821 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 822 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 823         add_to_page_cache_lru(pg, mapping, off, gfp)
 824 #define ll_pagevec_init(pv, cold)       do {} while (0)
 825 #define ll_pagevec_add(pv, pg)          (0)
 826 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 827 #else
 828 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 829         add_to_page_cache(pg, mapping, off, gfp)
 830 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 831 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 832 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 833 #endif
 834
 835 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 836 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 837 #define HAVE_NODE_TO_CPUMASK
 838 #endif
 839
 840 #ifndef QUOTA_OK
 841 # define QUOTA_OK 0
 842 #endif
 843 #ifndef NO_QUOTA
 844 # define NO_QUOTA (-EDQUOT)
 845 #endif
 846
 847 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 848 # define ext2_set_bit             __test_and_set_bit_le
 849 # define ext2_clear_bit           __test_and_clear_bit_le
 850 # define ext2_test_bit            test_bit_le
 851 # define ext2_find_first_zero_bit find_first_zero_bit_le
 852 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 853 #endif
 854
 855 #ifdef ATTR_TIMES_SET
 856 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 857 #else
 858 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 859 #endif
 860
 861 #ifndef HAVE_SELINUX_IS_ENABLED
 862 static inline bool selinux_is_enabled(void)
 863 {
 864         return 0;
 865 }
 866 #endif
 867
 868 #endif /* __KERNEL__ */
 869 #endif /* _COMPAT25_H */