lustre/include/linux/lustre_compat25.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * Copyright (c) 2011 Whamcloud, Inc.
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39
  40 #ifndef _LINUX_COMPAT25_H
  41 #define _LINUX_COMPAT25_H
  42
  43 #ifdef __KERNEL__
  44
  45 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  46 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  47 #endif
  48
  49 #include <linux/fs_struct.h>
  50 #include <libcfs/linux/portals_compat25.h>
  51
  52 #include <linux/lustre_patchless_compat.h>
  53
  54 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
  55  * definition allows to compile lustre client on more OS platforms. */
  56 #ifndef SEEK_SET
  57  #define SEEK_SET 0
  58  #define SEEK_CUR 1
  59  #define SEEK_END 2
  60 #endif
  61
  62 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  63 struct ll_iattr {
  64         struct iattr    iattr;
  65         unsigned int    ia_attr_flags;
  66 };
  67 #else
  68 #define ll_iattr iattr
  69 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  70
  71 #ifdef HAVE_FS_STRUCT_USE_PATH
  72 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  73                                  struct dentry *dentry)
  74 {
  75         struct path path;
  76         struct path old_pwd;
  77
  78         path.mnt = mnt;
  79         path.dentry = dentry;
  80         write_lock(&fs->lock);
  81         old_pwd = fs->pwd;
  82         path_get(&path);
  83         fs->pwd = path;
  84         write_unlock(&fs->lock);
  85
  86         if (old_pwd.dentry)
  87                 path_put(&old_pwd);
  88 }
  89
  90 #else
  91
  92 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  93                 struct dentry *dentry)
  94 {
  95         struct dentry *old_pwd;
  96         struct vfsmount *old_pwdmnt;
  97
  98         cfs_write_lock(&fs->lock);
  99         old_pwd = fs->pwd;
 100         old_pwdmnt = fs->pwdmnt;
 101         fs->pwdmnt = mntget(mnt);
 102         fs->pwd = dget(dentry);
 103         cfs_write_unlock(&fs->lock);
 104
 105         if (old_pwd) {
 106                 dput(old_pwd);
 107                 mntput(old_pwdmnt);
 108         }
 109 }
 110 #endif
 111
 112 /*
 113  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 114  * ATTR_* attributes (see bug 13828)
 115  */
 116 #define ATTR_BLOCKS    (1 << 27)
 117
 118 #if HAVE_INODE_I_MUTEX
 119 #define UNLOCK_INODE_MUTEX(inode) \
 120 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 121 #define LOCK_INODE_MUTEX(inode) \
 122 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 123 #define LOCK_INODE_MUTEX_PARENT(inode) \
 124 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 125 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 126 #else
 127 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 128 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 129 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 130 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 131 #endif /* HAVE_INODE_I_MUTEX */
 132
 133 #ifdef HAVE_SEQ_LOCK
 134 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 135 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 136 #else
 137 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 138 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 139 #endif
 140
 141 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 142 #define d_child d_u.d_child
 143 #define d_rcu d_u.d_rcu
 144 #endif
 145
 146 #ifdef HAVE_DQUOTOFF_MUTEX
 147 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 148 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 149 #else
 150 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 151 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 152 #endif /* HAVE_DQUOTOFF_MUTEX */
 153
 154 #define current_ngroups current_cred()->group_info->ngroups
 155 #define current_groups current_cred()->group_info->small_block
 156
 157 #ifndef page_private
 158 #define page_private(page) ((page)->private)
 159 #define set_page_private(page, v) ((page)->private = (v))
 160 #endif
 161
 162 #ifndef HAVE_GFP_T
 163 #define gfp_t int
 164 #endif
 165
 166 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 167 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 168
 169 #define ll_kernel_locked()      kernel_locked()
 170
 171 /*
 172  * OBD need working random driver, thus all our
 173  * initialization routines must be called after device
 174  * driver initialization
 175  */
 176 #ifndef MODULE
 177 #undef module_init
 178 #define module_init(a)     late_initcall(a)
 179 #endif
 180
 181 /* XXX our code should be using the 2.6 calls, not the other way around */
 182 #ifdef HAVE_TRYLOCK_PAGE
 183 #define TestSetPageLocked(page)         (!trylock_page(page))
 184 #endif
 185
 186 #define Page_Uptodate(page)             PageUptodate(page)
 187 #define ll_redirty_page(page)           set_page_dirty(page)
 188
 189 #define KDEVT_INIT(val)                 (val)
 190
 191 #define LTIME_S(time)                   (time.tv_sec)
 192 #define ll_path_lookup                  path_lookup
 193
 194 #ifdef HAVE_EXPORT_INODE_PERMISSION
 195 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 196 #else
 197 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 198 #endif
 199
 200 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 201 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 202 #define ll_call_writepage(inode, page)  \
 203                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 204 #define ll_invalidate_inode_pages(inode) \
 205                                 invalidate_inode_pages((inode)->i_mapping)
 206 #define ll_truncate_complete_page(page) \
 207                                 truncate_complete_page(page->mapping, page)
 208
 209 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 210 #define ll_dev_t                        dev_t
 211 #define kdev_t                          dev_t
 212 #define to_kdev_t(dev)                  (dev)
 213 #define kdev_t_to_nr(dev)               (dev)
 214 #define val_to_kdev(dev)                (dev)
 215
 216 #ifdef HAVE_BLKDEV_PUT_2ARGS
 217 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 218 #else
 219 #define ll_blkdev_put(a, b) blkdev_put(a)
 220 #endif
 221
 222 #ifdef HAVE_DENTRY_OPEN_4ARGS
 223 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 224 #else
 225 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 226 #endif
 227
 228 #include <linux/writeback.h>
 229
 230 static inline int cfs_cleanup_group_info(void)
 231 {
 232         struct group_info *ginfo;
 233
 234         ginfo = groups_alloc(0);
 235         if (!ginfo)
 236                 return -ENOMEM;
 237
 238         set_current_groups(ginfo);
 239         put_group_info(ginfo);
 240
 241         return 0;
 242 }
 243
 244 #define __set_page_ll_data(page, llap) \
 245         do {       \
 246                 page_cache_get(page); \
 247                 SetPagePrivate(page); \
 248                 set_page_private(page, (unsigned long)llap); \
 249         } while (0)
 250 #define __clear_page_ll_data(page) \
 251         do {       \
 252                 ClearPagePrivate(page); \
 253                 set_page_private(page, 0); \
 254                 page_cache_release(page); \
 255         } while(0)
 256
 257 #define kiobuf bio
 258
 259 #include <linux/proc_fs.h>
 260
 261 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 262 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 263 extern void __d_rehash(struct dentry *dentry, int lock);
 264 #endif
 265
 266 #ifdef HAVE_CAN_SLEEP_ARG
 267 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 268         flock_lock_file_wait(file, lock, can_sleep)
 269 #else
 270 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 271         flock_lock_file_wait(file, lock)
 272 #endif
 273
 274 #define CheckWriteback(page, cmd) \
 275         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 276          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 277
 278 #ifdef HAVE_PAGE_LIST
 279 static inline int mapping_has_pages(struct address_space *mapping)
 280 {
 281         int rc = 1;
 282
 283         ll_pgcache_lock(mapping);
 284         if (cfs_list_empty(&mapping->dirty_pages) &&
 285             cfs_list_empty(&mapping->clean_pages) &&
 286             cfs_list_empty(&mapping->locked_pages)) {
 287                 rc = 0;
 288         }
 289         ll_pgcache_unlock(mapping);
 290
 291         return rc;
 292 }
 293 #else
 294 static inline int mapping_has_pages(struct address_space *mapping)
 295 {
 296         return mapping->nrpages > 0;
 297 }
 298 #endif
 299
 300 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 301 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 302 #else
 303 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 304 #endif
 305
 306 #ifdef HAVE_SECURITY_PLUG
 307 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 308                 vfs_symlink(dir, dentry, mnt, path, mode)
 309 #else
 310 #ifdef HAVE_4ARGS_VFS_SYMLINK
 311 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 312                 vfs_symlink(dir, dentry, path, mode)
 313 #else
 314 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 315                        vfs_symlink(dir, dentry, path)
 316 #endif
 317
 318 #define ll_set_dflags(dentry, flags) do { \
 319                 cfs_spin_lock(&dentry->d_lock); \
 320                 dentry->d_flags |= flags; \
 321                 cfs_spin_unlock(&dentry->d_lock); \
 322         } while(0)
 323 #endif
 324
 325 #ifndef container_of
 326 #define container_of(ptr, type, member) ({                      \
 327                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 328                 (type *)( (char *)__mptr - offsetof(type,member) );})
 329 #endif
 330
 331 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 332 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 333 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 334
 335 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 336 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 337 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 338
 339 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 340 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 341 #endif
 342
 343 #include <linux/mpage.h>        /* for generic_writepages */
 344 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 345 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 346 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 347                                            loff_t start, loff_t end)
 348 {
 349         int rc;
 350         struct writeback_control wbc = {
 351                 .sync_mode = WB_SYNC_ALL,
 352                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 353         };
 354
 355 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 356         wbc.range_start = start;
 357         wbc.range_end = end;
 358 #else
 359         wbc.start = start;
 360         wbc.end = end;
 361 #endif
 362
 363 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 364         if (!mapping_cap_writeback_dirty(mapping))
 365                 rc = 0;
 366 #else
 367         if (mapping->backing_dev_info->memory_backed)
 368                 rc = 0;
 369 #endif
 370         /* do_writepages() */
 371         else if (mapping->a_ops->writepages)
 372                 rc = mapping->a_ops->writepages(mapping, &wbc);
 373         else
 374                 rc = generic_writepages(mapping, &wbc);
 375         return rc;
 376 }
 377 #else
 378 int filemap_fdatawrite_range(struct address_space *mapping,
 379                              loff_t start, loff_t end);
 380 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 381
 382 #ifdef HAVE_VFS_KERN_MOUNT
 383 static inline struct vfsmount *
 384 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 385 {
 386         struct file_system_type *type = get_fs_type(fstype);
 387         struct vfsmount *mnt;
 388         if (!type)
 389                 return ERR_PTR(-ENODEV);
 390         mnt = vfs_kern_mount(type, flags, name, data);
 391         cfs_module_put(type->owner);
 392         return mnt;
 393 }
 394 #else
 395 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 396 #endif
 397
 398 #ifdef HAVE_STATFS_DENTRY_PARAM
 399 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 400 #else
 401 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 402 #endif
 403
 404 #ifndef HAVE_SB_TIME_GRAN
 405 #ifndef HAVE_S_TIME_GRAN
 406 #error Need s_time_gran patch!
 407 #endif
 408 static inline u32 get_sb_time_gran(struct super_block *sb)
 409 {
 410         return sb->s_time_gran;
 411 }
 412 #endif
 413
 414 #ifdef HAVE_RW_TREE_LOCK
 415 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 416 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 417 #else
 418 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 419 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 420 #endif
 421
 422 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 423 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 424 #else
 425 static inline
 426 int ll_unregister_blkdev(unsigned int dev, const char *name)
 427 {
 428         unregister_blkdev(dev, name);
 429         return 0;
 430 }
 431 #endif
 432
 433 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 434 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 435 #else
 436 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 437 #endif
 438
 439 #ifdef HAVE_INODE_BLKSIZE
 440 #define ll_inode_blksize(a)     (a)->i_blksize
 441 #else
 442 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 443 #endif
 444
 445 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 446 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 447 #else
 448 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 449 #endif
 450
 451 #ifndef HAVE_D_OBTAIN_ALIAS
 452 /* The old d_alloc_anon() didn't free the inode reference on error
 453  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 454 static inline struct dentry *d_obtain_alias(struct inode *inode)
 455 {
 456         struct dentry *anon = d_alloc_anon(inode);
 457
 458         if (anon == NULL) {
 459                 iput(inode);
 460                 anon = ERR_PTR(-ENOMEM);
 461         }
 462
 463         return anon;
 464 }
 465 #endif
 466
 467 /* add a lustre compatible layer for crypto API */
 468 #include <linux/crypto.h>
 469 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 470 #define ll_crypto_hash          crypto_hash
 471 #define ll_crypto_cipher        crypto_blkcipher
 472 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 473 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 474 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 475 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 476 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 477 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 478                 crypto_alloc_blkcipher(name ,type, mask)
 479 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 480                 crypto_blkcipher_setkey(tfm, key, keylen)
 481 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 482                 crypto_blkcipher_set_iv(tfm, src, len)
 483 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 484                 crypto_blkcipher_get_iv(tfm, dst, len)
 485 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 486                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 487 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 488                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 489 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 490                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 491 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 492                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 493
 494 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 495                                  u8 *key, unsigned int *keylen,
 496                                  struct scatterlist *sg,
 497                                  unsigned int size, u8 *result)
 498 {
 499         struct hash_desc desc;
 500         int              rv;
 501         desc.tfm   = tfm;
 502         desc.flags = 0;
 503         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 504         if (rv) {
 505                 CERROR("failed to hash setkey: %d\n", rv);
 506                 return rv;
 507         }
 508         return crypto_hash_digest(&desc, sg, size, result);
 509 }
 510 static inline
 511 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 512 {
 513         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 514 }
 515 static inline
 516 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 517 {
 518         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 519 }
 520
 521 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 522 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 523 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 524 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 525 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 526 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 527 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 528 #include <linux/scatterlist.h>
 529 #define ll_crypto_hash          crypto_tfm
 530 #define ll_crypto_cipher        crypto_tfm
 531 #ifndef HAVE_STRUCT_HASH_DESC
 532 struct hash_desc {
 533         struct ll_crypto_hash *tfm;
 534         u32                    flags;
 535 };
 536 #endif
 537 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 538 struct blkcipher_desc {
 539         struct ll_crypto_cipher *tfm;
 540         void                    *info;
 541         u32                      flags;
 542 };
 543 #endif
 544 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 545         crypto_cipher_setkey(tfm, key, keylen)
 546 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 547         crypto_cipher_set_iv(tfm, src, len)
 548 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 549         crypto_cipher_get_iv(tfm, dst, len)
 550 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 551         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 552 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 553         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 554 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 555         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 556 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 557         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 558
 559 static inline
 560 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 561                                                    u32 type, u32 mask)
 562 {
 563         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 564         const char *pan = algname;
 565         u32         flag = 0;
 566
 567         if (strncmp("cbc(", algname, 4) == 0)
 568                 flag |= CRYPTO_TFM_MODE_CBC;
 569         else if (strncmp("ecb(", algname, 4) == 0)
 570                 flag |= CRYPTO_TFM_MODE_ECB;
 571         if (flag) {
 572                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 573                 if (vp) {
 574                         memcpy(buf, algname + 4, vp - algname - 4);
 575                         buf[vp - algname - 4] = '\0';
 576                         pan = buf;
 577                 } else {
 578                         flag = 0;
 579                 }
 580         }
 581         return crypto_alloc_tfm(pan, flag);
 582 }
 583
 584 static inline
 585 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 586 {
 587         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 588         const char *pan = alg;
 589
 590         if (strncmp("hmac(", alg, 5) == 0) {
 591                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 592                 if (vp) {
 593                         memcpy(buf, alg+ 5, vp - alg- 5);
 594                         buf[vp - alg - 5] = 0x00;
 595                         pan = buf;
 596                 }
 597         }
 598         return crypto_alloc_tfm(pan, 0);
 599 }
 600 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 601 {
 602        crypto_digest_init(desc->tfm); return 0;
 603 }
 604 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 605                                         struct scatterlist *sg,
 606                                         unsigned int nbytes)
 607 {
 608         struct scatterlist *sl = sg;
 609         unsigned int        count;
 610                 /*
 611                  * This way is very weakness. We must ensure that
 612                  * the sum of sg[0..i]->length isn't greater than nbytes.
 613                  * In the upstream kernel the crypto_hash_update() also
 614                  * via the nbytes computed the count of sg[...].
 615                  * The old style is more safely. but it gone.
 616                  */
 617         for (count = 0; nbytes > 0; count ++, sl ++) {
 618                 nbytes -= sl->length;
 619         }
 620         crypto_digest_update(desc->tfm, sg, count); return 0;
 621 }
 622 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 623 {
 624         crypto_digest_final(desc->tfm, out); return 0;
 625 }
 626 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 627                                  u8 *key, unsigned int *keylen,
 628                                  struct scatterlist *sg,
 629                                  unsigned int nbytes,
 630                                  u8 *out)
 631 {
 632         struct scatterlist *sl = sg;
 633         int                 count;
 634         for (count = 0; nbytes > 0; count ++, sl ++) {
 635                 nbytes -= sl->length;
 636         }
 637         crypto_hmac(tfm, key, keylen, sg, count, out);
 638         return 0;
 639 }
 640
 641 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 642 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 643 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 644 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 645 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 646 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 647 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 648 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 649 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 650 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 651
 652 #ifndef HAVE_SYNCHRONIZE_RCU
 653 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 654 #ifndef synchronize_rcu
 655 #define synchronize_rcu() synchronize_kernel()
 656 #endif
 657 #endif
 658
 659 #ifdef HAVE_FILE_REMOVE_SUID
 660 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 661 #else
 662 # ifdef HAVE_SECURITY_PLUG
 663 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 664 # else
 665 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 666 # endif
 667 #endif
 668
 669 #ifdef HAVE_SECURITY_PLUG
 670 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 671 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 672 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 673 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 674 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 675                 vfs_mknod(dir,entry,mnt,mode,dev)
 676 #define ll_security_inode_unlink(dir,entry,mnt)         \
 677                 security_inode_unlink(dir,entry,mnt)
 678 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 679                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 680 #else
 681 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 682 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 683 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 684 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 685 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 686 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 687 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 688                 vfs_rename(old,old_dir,new,new_dir)
 689 #endif /* HAVE_SECURITY_PLUG */
 690
 691 #ifdef for_each_possible_cpu
 692 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 693 #elif defined(for_each_cpu)
 694 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 695 #endif
 696
 697 #ifndef cpu_to_node
 698 #define cpu_to_node(cpu)         0
 699 #endif
 700
 701 #ifdef HAVE_BIO_ENDIO_2ARG
 702 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 703 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 704 #else
 705 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 706 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 707 #endif
 708
 709 #ifdef HAVE_FS_STRUCT_USE_PATH
 710 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 711 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 712 #define cfs_path_put(nd)     path_put(&(nd)->path)
 713 #else
 714 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 715 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 716 #define cfs_path_put(nd)     path_release(nd)
 717 #endif
 718
 719 #ifndef abs
 720 static inline int abs(int x)
 721 {
 722         return (x < 0) ? -x : x;
 723 }
 724 #endif
 725
 726 #ifndef labs
 727 static inline long labs(long x)
 728 {
 729         return (x < 0) ? -x : x;
 730 }
 731 #endif /* HAVE_REGISTER_SHRINKER */
 732
 733 #ifdef HAVE_INVALIDATE_INODE_PAGES
 734 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 735 #endif
 736
 737 #ifdef HAVE_INODE_IPRIVATE
 738 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 739 #else
 740 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 741 #endif
 742
 743 #ifndef SLAB_DESTROY_BY_RCU
 744 #define CFS_SLAB_DESTROY_BY_RCU 0
 745 #else
 746 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 747 #endif
 748
 749 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 750 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 751 #else
 752 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 753 #endif
 754
 755 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 756 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 757 #else
 758 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 759 #endif
 760
 761 static inline int
 762 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 763 {
 764         if (sb->s_qcop->quota_on) {
 765                 return sb->s_qcop->quota_on(sb, off, ver, name
 766 #ifdef HAVE_QUOTA_ON_5ARGS
 767                                             , remount
 768 #endif
 769                                            );
 770         }
 771         else
 772                 return -ENOSYS;
 773 }
 774
 775 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 776 {
 777         if (sb->s_qcop->quota_off) {
 778                 return sb->s_qcop->quota_off(sb, off
 779 #ifdef HAVE_QUOTA_OFF_3ARGS
 780                                              , remount
 781 #endif
 782                                             );
 783         }
 784         else
 785                 return -ENOSYS;
 786 }
 787
 788 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 789 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 790 #endif
 791
 792 #ifndef HAVE_VFS_DQ_OFF
 793 # define ll_vfs_dq_init             DQUOT_INIT
 794 # define ll_vfs_dq_drop             DQUOT_DROP
 795 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 796 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 797 #else
 798 # define ll_vfs_dq_init             vfs_dq_init
 799 # define ll_vfs_dq_drop             vfs_dq_drop
 800 # define ll_vfs_dq_transfer         vfs_dq_transfer
 801 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 802 #endif
 803
 804 #ifdef HAVE_BDI_INIT
 805 #define ll_bdi_init(bdi)    bdi_init(bdi)
 806 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 807 #else
 808 #define ll_bdi_init(bdi)    0
 809 #define ll_bdi_destroy(bdi) do { } while(0)
 810 #endif
 811
 812 #ifdef HAVE_NEW_BACKING_DEV_INFO
 813 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 814 #else
 815 # define ll_bdi_wb_cnt(bdi) 1
 816 #endif
 817
 818 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 819 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 820 #endif
 821
 822 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 823 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 824 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 825 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 826 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 827 #endif
 828
 829 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 830 #define blk_queue_max_segments(rq, seg)                      \
 831         do { blk_queue_max_phys_segments(rq, seg);           \
 832              blk_queue_max_hw_segments(rq, seg); } while (0)
 833 #else
 834 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 835 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 836 #endif
 837
 838
 839 #ifndef HAVE_BI_HW_SEGMENTS
 840 #define bio_hw_segments(q, bio) 0
 841 #endif
 842
 843 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 844 #define pagevec_lru_add_file pagevec_lru_add
 845 #endif
 846
 847 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 848 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 849         add_to_page_cache_lru(pg, mapping, off, gfp)
 850 #define ll_pagevec_init(pv, cold)       do {} while (0)
 851 #define ll_pagevec_add(pv, pg)          (0)
 852 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 853 #else
 854 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 855         add_to_page_cache(pg, mapping, off, gfp)
 856 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 857 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 858 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 859 #endif
 860
 861 #endif /* __KERNEL__ */
 862 #endif /* _COMPAT25_H */