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 ll_kernel_locked()      kernel_locked()
 161
 162 /*
 163  * OBD need working random driver, thus all our
 164  * initialization routines must be called after device
 165  * driver initialization
 166  */
 167 #ifndef MODULE
 168 #undef module_init
 169 #define module_init(a)     late_initcall(a)
 170 #endif
 171
 172 /* XXX our code should be using the 2.6 calls, not the other way around */
 173 #ifdef HAVE_TRYLOCK_PAGE
 174 #define TestSetPageLocked(page)         (!trylock_page(page))
 175 #endif
 176
 177 #define Page_Uptodate(page)             PageUptodate(page)
 178 #define ll_redirty_page(page)           set_page_dirty(page)
 179
 180 #define KDEVT_INIT(val)                 (val)
 181
 182 #define LTIME_S(time)                   (time.tv_sec)
 183 #define ll_path_lookup                  path_lookup
 184
 185 #ifdef HAVE_EXPORT_INODE_PERMISSION
 186 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 187 #else
 188 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 189 #endif
 190
 191 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 192 #define ll_generic_permission(inode, mask, flags, check_acl) \
 193         generic_permission(inode, mask, flags, check_acl)
 194 #else
 195 #define ll_generic_permission(inode, mask, flags, check_acl) \
 196         generic_permission(inode, mask, check_acl)
 197 #endif
 198
 199 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 200 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 201 #define ll_call_writepage(inode, page)  \
 202                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 203 #define ll_invalidate_inode_pages(inode) \
 204                                 invalidate_inode_pages((inode)->i_mapping)
 205
 206 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 207 #define ll_dev_t                        dev_t
 208 #define kdev_t                          dev_t
 209 #define to_kdev_t(dev)                  (dev)
 210 #define kdev_t_to_nr(dev)               (dev)
 211 #define val_to_kdev(dev)                (dev)
 212
 213 #ifdef HAVE_BLKDEV_PUT_2ARGS
 214 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 215 #else
 216 #define ll_blkdev_put(a, b) blkdev_put(a)
 217 #endif
 218
 219 #ifdef HAVE_DENTRY_OPEN_4ARGS
 220 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 221 #else
 222 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 223 #endif
 224
 225 #include <linux/writeback.h>
 226
 227 static inline int cfs_cleanup_group_info(void)
 228 {
 229         struct group_info *ginfo;
 230
 231         ginfo = groups_alloc(0);
 232         if (!ginfo)
 233                 return -ENOMEM;
 234
 235         set_current_groups(ginfo);
 236         put_group_info(ginfo);
 237
 238         return 0;
 239 }
 240
 241 #define __set_page_ll_data(page, llap) \
 242         do {       \
 243                 page_cache_get(page); \
 244                 SetPagePrivate(page); \
 245                 set_page_private(page, (unsigned long)llap); \
 246         } while (0)
 247 #define __clear_page_ll_data(page) \
 248         do {       \
 249                 ClearPagePrivate(page); \
 250                 set_page_private(page, 0); \
 251                 page_cache_release(page); \
 252         } while(0)
 253
 254 #define kiobuf bio
 255
 256 #include <linux/proc_fs.h>
 257
 258 #define CheckWriteback(page, cmd) \
 259         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 260          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 261
 262 #ifdef HAVE_PAGE_LIST
 263 static inline int mapping_has_pages(struct address_space *mapping)
 264 {
 265         int rc = 1;
 266
 267         ll_pgcache_lock(mapping);
 268         if (cfs_list_empty(&mapping->dirty_pages) &&
 269             cfs_list_empty(&mapping->clean_pages) &&
 270             cfs_list_empty(&mapping->locked_pages)) {
 271                 rc = 0;
 272         }
 273         ll_pgcache_unlock(mapping);
 274
 275         return rc;
 276 }
 277 #else
 278 static inline int mapping_has_pages(struct address_space *mapping)
 279 {
 280         return mapping->nrpages > 0;
 281 }
 282 #endif
 283
 284 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 285 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 286 #else
 287 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 288 #endif
 289
 290 #ifdef HAVE_SECURITY_PLUG
 291 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 292                 vfs_symlink(dir, dentry, mnt, path, mode)
 293 #else
 294 #ifdef HAVE_4ARGS_VFS_SYMLINK
 295 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 296                 vfs_symlink(dir, dentry, path, mode)
 297 #else
 298 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 299                        vfs_symlink(dir, dentry, path)
 300 #endif
 301
 302 #endif
 303
 304 #ifndef container_of
 305 #define container_of(ptr, type, member) ({                      \
 306                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 307                 (type *)( (char *)__mptr - offsetof(type,member) );})
 308 #endif
 309
 310 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 311 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 312 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 313
 314 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 315 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 316 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 317
 318 #include <linux/mpage.h>        /* for generic_writepages */
 319
 320 #ifndef HAVE_ATOMIC_MNT_COUNT
 321 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 322 {
 323 #ifdef CONFIG_SMP
 324         unsigned int count = 0;
 325         int cpu;
 326
 327         for_each_possible_cpu(cpu) {
 328                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 329         }
 330
 331         return count;
 332 #else
 333         return mnt->mnt_count;
 334 #endif
 335 }
 336 #else
 337 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 338 #endif
 339
 340 #ifdef HAVE_STATFS_DENTRY_PARAM
 341 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 342 #else
 343 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 344 #endif
 345
 346 #ifndef HAVE_SB_TIME_GRAN
 347 #ifndef HAVE_S_TIME_GRAN
 348 #error Need s_time_gran patch!
 349 #endif
 350 static inline u32 get_sb_time_gran(struct super_block *sb)
 351 {
 352         return sb->s_time_gran;
 353 }
 354 #endif
 355
 356 #ifdef HAVE_RW_TREE_LOCK
 357 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 358 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 359 #else
 360 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 361 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 362 #endif
 363
 364 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 365 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 366 #else
 367 static inline
 368 int ll_unregister_blkdev(unsigned int dev, const char *name)
 369 {
 370         unregister_blkdev(dev, name);
 371         return 0;
 372 }
 373 #endif
 374
 375 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 376 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 377 #else
 378 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 379 #endif
 380
 381 #ifdef HAVE_INODE_BLKSIZE
 382 #define ll_inode_blksize(a)     (a)->i_blksize
 383 #else
 384 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 385 #endif
 386
 387 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 388 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 389 #else
 390 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 391 #endif
 392
 393 #ifndef HAVE_D_OBTAIN_ALIAS
 394 /* The old d_alloc_anon() didn't free the inode reference on error
 395  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 396 static inline struct dentry *d_obtain_alias(struct inode *inode)
 397 {
 398         struct dentry *anon = d_alloc_anon(inode);
 399
 400         if (anon == NULL) {
 401                 iput(inode);
 402                 anon = ERR_PTR(-ENOMEM);
 403         }
 404
 405         return anon;
 406 }
 407 #endif
 408
 409 /* add a lustre compatible layer for crypto API */
 410 #include <linux/crypto.h>
 411 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 412 #define ll_crypto_hash          crypto_hash
 413 #define ll_crypto_cipher        crypto_blkcipher
 414 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 415 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 416 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 417 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 418 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 419 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 420                 crypto_blkcipher_setkey(tfm, key, keylen)
 421 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 422                 crypto_blkcipher_set_iv(tfm, src, len)
 423 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 424                 crypto_blkcipher_get_iv(tfm, dst, len)
 425 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 426                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 427 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 428                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 429 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 430                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 431 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 432                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 433
 434 static inline
 435 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 436                                                    u32 type, u32 mask)
 437 {
 438         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 439
 440         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 441 }
 442
 443 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 444                                  u8 *key, unsigned int *keylen,
 445                                  struct scatterlist *sg,
 446                                  unsigned int size, u8 *result)
 447 {
 448         struct hash_desc desc;
 449         int              rv;
 450         desc.tfm   = tfm;
 451         desc.flags = 0;
 452         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 453         if (rv) {
 454                 CERROR("failed to hash setkey: %d\n", rv);
 455                 return rv;
 456         }
 457         return crypto_hash_digest(&desc, sg, size, result);
 458 }
 459 static inline
 460 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 461 {
 462         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 463 }
 464 static inline
 465 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 466 {
 467         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 468 }
 469
 470 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 471 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 472 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 473 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 474 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 475 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 476 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 477 #include <linux/scatterlist.h>
 478 #define ll_crypto_hash          crypto_tfm
 479 #define ll_crypto_cipher        crypto_tfm
 480 #ifndef HAVE_STRUCT_HASH_DESC
 481 struct hash_desc {
 482         struct ll_crypto_hash *tfm;
 483         u32                    flags;
 484 };
 485 #endif
 486 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 487 struct blkcipher_desc {
 488         struct ll_crypto_cipher *tfm;
 489         void                    *info;
 490         u32                      flags;
 491 };
 492 #endif
 493 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 494         crypto_cipher_setkey(tfm, key, keylen)
 495 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 496         crypto_cipher_set_iv(tfm, src, len)
 497 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 498         crypto_cipher_get_iv(tfm, dst, len)
 499 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 500         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 501 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 502         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 503 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 504         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 505 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 506         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 507
 508 static inline
 509 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 510                                                    u32 type, u32 mask)
 511 {
 512         struct ll_crypto_cipher *rtn;
 513         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 514         const char              *pan = algname;
 515         u32                      flag = 0;
 516
 517         if (strncmp("cbc(", algname, 4) == 0)
 518                 flag |= CRYPTO_TFM_MODE_CBC;
 519         else if (strncmp("ecb(", algname, 4) == 0)
 520                 flag |= CRYPTO_TFM_MODE_ECB;
 521         if (flag) {
 522                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 523                 if (vp) {
 524                         memcpy(buf, algname + 4, vp - algname - 4);
 525                         buf[vp - algname - 4] = '\0';
 526                         pan = buf;
 527                 } else {
 528                         flag = 0;
 529                 }
 530         }
 531         rtn = crypto_alloc_tfm(pan, flag);
 532         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 533 }
 534
 535 static inline
 536 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 537 {
 538         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 539         const char *pan = alg;
 540
 541         if (strncmp("hmac(", alg, 5) == 0) {
 542                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 543                 if (vp) {
 544                         memcpy(buf, alg+ 5, vp - alg- 5);
 545                         buf[vp - alg - 5] = 0x00;
 546                         pan = buf;
 547                 }
 548         }
 549         return crypto_alloc_tfm(pan, 0);
 550 }
 551 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 552 {
 553        crypto_digest_init(desc->tfm); return 0;
 554 }
 555 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 556                                         struct scatterlist *sg,
 557                                         unsigned int nbytes)
 558 {
 559         struct scatterlist *sl = sg;
 560         unsigned int        count;
 561                 /*
 562                  * This way is very weakness. We must ensure that
 563                  * the sum of sg[0..i]->length isn't greater than nbytes.
 564                  * In the upstream kernel the crypto_hash_update() also
 565                  * via the nbytes computed the count of sg[...].
 566                  * The old style is more safely. but it gone.
 567                  */
 568         for (count = 0; nbytes > 0; count ++, sl ++) {
 569                 nbytes -= sl->length;
 570         }
 571         crypto_digest_update(desc->tfm, sg, count); return 0;
 572 }
 573 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 574 {
 575         crypto_digest_final(desc->tfm, out); return 0;
 576 }
 577 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 578                                  u8 *key, unsigned int *keylen,
 579                                  struct scatterlist *sg,
 580                                  unsigned int nbytes,
 581                                  u8 *out)
 582 {
 583         struct scatterlist *sl = sg;
 584         int                 count;
 585         for (count = 0; nbytes > 0; count ++, sl ++) {
 586                 nbytes -= sl->length;
 587         }
 588         crypto_hmac(tfm, key, keylen, sg, count, out);
 589         return 0;
 590 }
 591
 592 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 593 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 594 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 595 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 596 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 597 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 598 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 599 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 600 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 601 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 602
 603 #ifdef HAVE_FILE_REMOVE_SUID
 604 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 605 #else
 606 # ifdef HAVE_SECURITY_PLUG
 607 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 608 # else
 609 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 610 # endif
 611 #endif
 612
 613 #ifdef HAVE_SECURITY_PLUG
 614 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 615 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 616 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 617 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 618 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 619                 vfs_mknod(dir,entry,mnt,mode,dev)
 620 #define ll_security_inode_unlink(dir,entry,mnt)         \
 621                 security_inode_unlink(dir,entry,mnt)
 622 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 623                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 624 #else
 625 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 626 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 627 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 628 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 629 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 630 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 631 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 632                 vfs_rename(old,old_dir,new,new_dir)
 633 #endif /* HAVE_SECURITY_PLUG */
 634
 635 #ifdef for_each_possible_cpu
 636 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 637 #elif defined(for_each_cpu)
 638 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 639 #endif
 640
 641 #ifdef HAVE_BIO_ENDIO_2ARG
 642 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 643 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 644 #else
 645 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 646 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 647 #endif
 648
 649 #ifdef HAVE_FS_STRUCT_USE_PATH
 650 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 651 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 652 #define cfs_path_put(nd)     path_put(&(nd)->path)
 653 #else
 654 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 655 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 656 #define cfs_path_put(nd)     path_release(nd)
 657 #endif
 658
 659 #ifndef abs
 660 static inline int abs(int x)
 661 {
 662         return (x < 0) ? -x : x;
 663 }
 664 #endif
 665
 666 #ifndef labs
 667 static inline long labs(long x)
 668 {
 669         return (x < 0) ? -x : x;
 670 }
 671 #endif /* HAVE_REGISTER_SHRINKER */
 672
 673 #ifdef HAVE_INVALIDATE_INODE_PAGES
 674 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 675 #endif
 676
 677 #ifdef HAVE_INODE_IPRIVATE
 678 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 679 #else
 680 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 681 #endif
 682
 683 #ifndef HAVE_SIMPLE_SETATTR
 684 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 685 #endif
 686
 687 #ifndef SLAB_DESTROY_BY_RCU
 688 #define CFS_SLAB_DESTROY_BY_RCU 0
 689 #else
 690 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 691 #endif
 692
 693 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 694 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 695 #else
 696 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 697 #endif
 698
 699 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 700 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 701 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 702 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 703 #else
 704 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 705 #endif
 706
 707 static inline int
 708 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 709 {
 710         int rc;
 711
 712         if (sb->s_qcop->quota_on) {
 713 #ifdef HAVE_QUOTA_ON_USE_PATH
 714                 struct path path;
 715
 716                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 717                 if (!rc)
 718                         return rc;
 719 #endif
 720                 rc = sb->s_qcop->quota_on(sb, off, ver
 721 #ifdef HAVE_QUOTA_ON_USE_PATH
 722                                             , &path
 723 #else
 724                                             , name
 725 #endif
 726 #ifdef HAVE_QUOTA_ON_5ARGS
 727                                             , remount
 728 #endif
 729                                            );
 730 #ifdef HAVE_QUOTA_ON_USE_PATH
 731                 path_put(&path);
 732 #endif
 733                 return rc;
 734         }
 735         else
 736                 return -ENOSYS;
 737 }
 738
 739 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 740 {
 741         if (sb->s_qcop->quota_off) {
 742                 return sb->s_qcop->quota_off(sb, off
 743 #ifdef HAVE_QUOTA_OFF_3ARGS
 744                                              , remount
 745 #endif
 746                                             );
 747         }
 748         else
 749                 return -ENOSYS;
 750 }
 751
 752 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 753 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 754 #endif
 755
 756 #ifndef HAVE_VFS_DQ_OFF
 757 # define ll_vfs_dq_init             DQUOT_INIT
 758 # define ll_vfs_dq_drop             DQUOT_DROP
 759 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 760 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 761 #else
 762 # define ll_vfs_dq_init             vfs_dq_init
 763 # define ll_vfs_dq_drop             vfs_dq_drop
 764 # define ll_vfs_dq_transfer         vfs_dq_transfer
 765 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 766 #endif
 767
 768 #ifdef HAVE_BDI_INIT
 769 #define ll_bdi_init(bdi)    bdi_init(bdi)
 770 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 771 #else
 772 #define ll_bdi_init(bdi)    0
 773 #define ll_bdi_destroy(bdi) do { } while(0)
 774 #endif
 775
 776 #ifdef HAVE_NEW_BACKING_DEV_INFO
 777 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 778 #else
 779 # define ll_bdi_wb_cnt(bdi) 1
 780 #endif
 781
 782 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 783 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 784 #endif
 785
 786 #ifndef HAVE_BLKDEV_GET_BY_DEV
 787 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 788 #endif
 789
 790 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 791 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 792 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 793 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 794 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 795 #endif
 796
 797 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 798 #define blk_queue_max_segments(rq, seg)                      \
 799         do { blk_queue_max_phys_segments(rq, seg);           \
 800              blk_queue_max_hw_segments(rq, seg); } while (0)
 801 #else
 802 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 803 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 804 #endif
 805
 806
 807 #ifndef HAVE_BI_HW_SEGMENTS
 808 #define bio_hw_segments(q, bio) 0
 809 #endif
 810
 811 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 812 #define pagevec_lru_add_file pagevec_lru_add
 813 #endif
 814
 815 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 816 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 817         add_to_page_cache_lru(pg, mapping, off, gfp)
 818 #define ll_pagevec_init(pv, cold)       do {} while (0)
 819 #define ll_pagevec_add(pv, pg)          (0)
 820 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 821 #else
 822 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 823         add_to_page_cache(pg, mapping, off, gfp)
 824 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 825 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 826 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 827 #endif
 828
 829 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 830 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 831 #define HAVE_NODE_TO_CPUMASK
 832 #endif
 833
 834 #ifndef QUOTA_OK
 835 # define QUOTA_OK 0
 836 #endif
 837 #ifndef NO_QUOTA
 838 # define NO_QUOTA (-EDQUOT)
 839 #endif
 840
 841 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 842 # define ext2_set_bit             __test_and_set_bit_le
 843 # define ext2_clear_bit           __test_and_clear_bit_le
 844 # define ext2_test_bit            test_bit_le
 845 # define ext2_find_first_zero_bit find_first_zero_bit_le
 846 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 847 #endif
 848
 849 #ifdef ATTR_TIMES_SET
 850 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 851 #else
 852 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 853 #endif
 854
 855 #ifndef HAVE_SELINUX_IS_ENABLED
 856 static inline bool selinux_is_enabled(void)
 857 {
 858         return 0;
 859 }
 860 #endif
 861
 862 #endif /* __KERNEL__ */
 863 #endif /* _COMPAT25_H */