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 #ifdef HAVE_SEQ_LOCK
 142 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 143 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 144 #else
 145 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 146 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 147 #endif
 148
 149 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 150 #define d_child d_u.d_child
 151 #define d_rcu d_u.d_rcu
 152 #endif
 153
 154 #ifdef HAVE_DQUOTOFF_MUTEX
 155 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 156 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 157 #else
 158 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 159 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 160 #endif /* HAVE_DQUOTOFF_MUTEX */
 161
 162 #define current_ngroups current_cred()->group_info->ngroups
 163 #define current_groups current_cred()->group_info->small_block
 164
 165 #ifndef page_private
 166 #define page_private(page) ((page)->private)
 167 #define set_page_private(page, v) ((page)->private = (v))
 168 #endif
 169
 170 #ifndef HAVE_GFP_T
 171 #define gfp_t int
 172 #endif
 173
 174 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 175 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 176
 177 #define ll_kernel_locked()      kernel_locked()
 178
 179 /*
 180  * OBD need working random driver, thus all our
 181  * initialization routines must be called after device
 182  * driver initialization
 183  */
 184 #ifndef MODULE
 185 #undef module_init
 186 #define module_init(a)     late_initcall(a)
 187 #endif
 188
 189 /* XXX our code should be using the 2.6 calls, not the other way around */
 190 #ifdef HAVE_TRYLOCK_PAGE
 191 #define TestSetPageLocked(page)         (!trylock_page(page))
 192 #endif
 193
 194 #define Page_Uptodate(page)             PageUptodate(page)
 195 #define ll_redirty_page(page)           set_page_dirty(page)
 196
 197 #define KDEVT_INIT(val)                 (val)
 198
 199 #define LTIME_S(time)                   (time.tv_sec)
 200 #define ll_path_lookup                  path_lookup
 201
 202 #ifdef HAVE_EXPORT_INODE_PERMISSION
 203 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 204 #else
 205 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 206 #endif
 207
 208 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 209 #define ll_generic_permission(inode, mask, flags, check_acl) \
 210         generic_permission(inode, mask, flags, check_acl)
 211 #else
 212 #define ll_generic_permission(inode, mask, flags, check_acl) \
 213         generic_permission(inode, mask, check_acl)
 214 #endif
 215
 216 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 217 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 218 #define ll_call_writepage(inode, page)  \
 219                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 220 #define ll_invalidate_inode_pages(inode) \
 221                                 invalidate_inode_pages((inode)->i_mapping)
 222
 223 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 224 #define ll_dev_t                        dev_t
 225 #define kdev_t                          dev_t
 226 #define to_kdev_t(dev)                  (dev)
 227 #define kdev_t_to_nr(dev)               (dev)
 228 #define val_to_kdev(dev)                (dev)
 229
 230 #ifdef HAVE_BLKDEV_PUT_2ARGS
 231 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 232 #else
 233 #define ll_blkdev_put(a, b) blkdev_put(a)
 234 #endif
 235
 236 #ifdef HAVE_DENTRY_OPEN_4ARGS
 237 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 238 #else
 239 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 240 #endif
 241
 242 #include <linux/writeback.h>
 243
 244 static inline int cfs_cleanup_group_info(void)
 245 {
 246         struct group_info *ginfo;
 247
 248         ginfo = groups_alloc(0);
 249         if (!ginfo)
 250                 return -ENOMEM;
 251
 252         set_current_groups(ginfo);
 253         put_group_info(ginfo);
 254
 255         return 0;
 256 }
 257
 258 #define __set_page_ll_data(page, llap) \
 259         do {       \
 260                 page_cache_get(page); \
 261                 SetPagePrivate(page); \
 262                 set_page_private(page, (unsigned long)llap); \
 263         } while (0)
 264 #define __clear_page_ll_data(page) \
 265         do {       \
 266                 ClearPagePrivate(page); \
 267                 set_page_private(page, 0); \
 268                 page_cache_release(page); \
 269         } while(0)
 270
 271 #define kiobuf bio
 272
 273 #include <linux/proc_fs.h>
 274
 275 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 276 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 277 extern void __d_rehash(struct dentry *dentry, int lock);
 278 #endif
 279
 280 #ifdef HAVE_CAN_SLEEP_ARG
 281 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 282         flock_lock_file_wait(file, lock, can_sleep)
 283 #else
 284 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 285         flock_lock_file_wait(file, lock)
 286 #endif
 287
 288 #define CheckWriteback(page, cmd) \
 289         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 290          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 291
 292 #ifdef HAVE_PAGE_LIST
 293 static inline int mapping_has_pages(struct address_space *mapping)
 294 {
 295         int rc = 1;
 296
 297         ll_pgcache_lock(mapping);
 298         if (cfs_list_empty(&mapping->dirty_pages) &&
 299             cfs_list_empty(&mapping->clean_pages) &&
 300             cfs_list_empty(&mapping->locked_pages)) {
 301                 rc = 0;
 302         }
 303         ll_pgcache_unlock(mapping);
 304
 305         return rc;
 306 }
 307 #else
 308 static inline int mapping_has_pages(struct address_space *mapping)
 309 {
 310         return mapping->nrpages > 0;
 311 }
 312 #endif
 313
 314 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 315 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 316 #else
 317 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 318 #endif
 319
 320 #ifdef HAVE_SECURITY_PLUG
 321 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 322                 vfs_symlink(dir, dentry, mnt, path, mode)
 323 #else
 324 #ifdef HAVE_4ARGS_VFS_SYMLINK
 325 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 326                 vfs_symlink(dir, dentry, path, mode)
 327 #else
 328 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 329                        vfs_symlink(dir, dentry, path)
 330 #endif
 331
 332 #define ll_set_dflags(dentry, flags) do { \
 333                 cfs_spin_lock(&dentry->d_lock); \
 334                 dentry->d_flags |= flags; \
 335                 cfs_spin_unlock(&dentry->d_lock); \
 336         } while(0)
 337 #endif
 338
 339 #ifndef container_of
 340 #define container_of(ptr, type, member) ({                      \
 341                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 342                 (type *)( (char *)__mptr - offsetof(type,member) );})
 343 #endif
 344
 345 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 346 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 347 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 348
 349 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 350 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 351 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 352
 353 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 354 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 355 #endif
 356
 357 #include <linux/mpage.h>        /* for generic_writepages */
 358 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 359 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 360 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 361                                            loff_t start, loff_t end)
 362 {
 363         int rc;
 364         struct writeback_control wbc = {
 365                 .sync_mode = WB_SYNC_ALL,
 366                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 367         };
 368
 369 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 370         wbc.range_start = start;
 371         wbc.range_end = end;
 372 #else
 373         wbc.start = start;
 374         wbc.end = end;
 375 #endif
 376
 377 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 378         if (!mapping_cap_writeback_dirty(mapping))
 379                 rc = 0;
 380 #else
 381         if (mapping->backing_dev_info->memory_backed)
 382                 rc = 0;
 383 #endif
 384         /* do_writepages() */
 385         else if (mapping->a_ops->writepages)
 386                 rc = mapping->a_ops->writepages(mapping, &wbc);
 387         else
 388                 rc = generic_writepages(mapping, &wbc);
 389         return rc;
 390 }
 391 #else
 392 int filemap_fdatawrite_range(struct address_space *mapping,
 393                              loff_t start, loff_t end);
 394 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 395
 396 #ifdef HAVE_VFS_KERN_MOUNT
 397 static inline struct vfsmount *
 398 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 399 {
 400         struct file_system_type *type = get_fs_type(fstype);
 401         struct vfsmount *mnt;
 402         if (!type)
 403                 return ERR_PTR(-ENODEV);
 404         mnt = vfs_kern_mount(type, flags, name, data);
 405         cfs_module_put(type->owner);
 406         return mnt;
 407 }
 408 #else
 409 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 410 #endif
 411
 412 #ifndef HAVE_ATOMIC_MNT_COUNT
 413 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 414 {
 415 #ifdef CONFIG_SMP
 416         unsigned int count = 0;
 417         int cpu;
 418
 419         for_each_possible_cpu(cpu) {
 420                 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
 421         }
 422
 423         return count;
 424 #else
 425         return mnt->mnt_count;
 426 #endif
 427 }
 428 #else
 429 # define mnt_get_count(mnt)      cfs_atomic_read(&mnt->mnt_count)
 430 #endif
 431
 432 #ifdef HAVE_STATFS_DENTRY_PARAM
 433 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 434 #else
 435 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 436 #endif
 437
 438 #ifndef HAVE_SB_TIME_GRAN
 439 #ifndef HAVE_S_TIME_GRAN
 440 #error Need s_time_gran patch!
 441 #endif
 442 static inline u32 get_sb_time_gran(struct super_block *sb)
 443 {
 444         return sb->s_time_gran;
 445 }
 446 #endif
 447
 448 #ifdef HAVE_RW_TREE_LOCK
 449 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 450 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 451 #else
 452 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 453 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 454 #endif
 455
 456 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 457 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 458 #else
 459 static inline
 460 int ll_unregister_blkdev(unsigned int dev, const char *name)
 461 {
 462         unregister_blkdev(dev, name);
 463         return 0;
 464 }
 465 #endif
 466
 467 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 468 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 469 #else
 470 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 471 #endif
 472
 473 #ifdef HAVE_INODE_BLKSIZE
 474 #define ll_inode_blksize(a)     (a)->i_blksize
 475 #else
 476 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 477 #endif
 478
 479 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 480 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 481 #else
 482 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 483 #endif
 484
 485 #ifndef HAVE_D_OBTAIN_ALIAS
 486 /* The old d_alloc_anon() didn't free the inode reference on error
 487  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 488 static inline struct dentry *d_obtain_alias(struct inode *inode)
 489 {
 490         struct dentry *anon = d_alloc_anon(inode);
 491
 492         if (anon == NULL) {
 493                 iput(inode);
 494                 anon = ERR_PTR(-ENOMEM);
 495         }
 496
 497         return anon;
 498 }
 499 #endif
 500
 501 /* add a lustre compatible layer for crypto API */
 502 #include <linux/crypto.h>
 503 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 504 #define ll_crypto_hash          crypto_hash
 505 #define ll_crypto_cipher        crypto_blkcipher
 506 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 507 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 508 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 509 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 510 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 511 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 512                 crypto_alloc_blkcipher(name ,type, mask)
 513 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 514                 crypto_blkcipher_setkey(tfm, key, keylen)
 515 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 516                 crypto_blkcipher_set_iv(tfm, src, len)
 517 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 518                 crypto_blkcipher_get_iv(tfm, dst, len)
 519 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 520                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 521 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 522                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 523 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 524                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 525 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 526                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 527
 528 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 529                                  u8 *key, unsigned int *keylen,
 530                                  struct scatterlist *sg,
 531                                  unsigned int size, u8 *result)
 532 {
 533         struct hash_desc desc;
 534         int              rv;
 535         desc.tfm   = tfm;
 536         desc.flags = 0;
 537         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 538         if (rv) {
 539                 CERROR("failed to hash setkey: %d\n", rv);
 540                 return rv;
 541         }
 542         return crypto_hash_digest(&desc, sg, size, result);
 543 }
 544 static inline
 545 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 546 {
 547         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 548 }
 549 static inline
 550 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 551 {
 552         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 553 }
 554
 555 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 556 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 557 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 558 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 559 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 560 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 561 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 562 #include <linux/scatterlist.h>
 563 #define ll_crypto_hash          crypto_tfm
 564 #define ll_crypto_cipher        crypto_tfm
 565 #ifndef HAVE_STRUCT_HASH_DESC
 566 struct hash_desc {
 567         struct ll_crypto_hash *tfm;
 568         u32                    flags;
 569 };
 570 #endif
 571 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 572 struct blkcipher_desc {
 573         struct ll_crypto_cipher *tfm;
 574         void                    *info;
 575         u32                      flags;
 576 };
 577 #endif
 578 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 579         crypto_cipher_setkey(tfm, key, keylen)
 580 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 581         crypto_cipher_set_iv(tfm, src, len)
 582 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 583         crypto_cipher_get_iv(tfm, dst, len)
 584 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 585         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 586 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 587         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 588 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 589         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 590 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 591         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 592
 593 static inline
 594 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 595                                                    u32 type, u32 mask)
 596 {
 597         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 598         const char *pan = algname;
 599         u32         flag = 0;
 600
 601         if (strncmp("cbc(", algname, 4) == 0)
 602                 flag |= CRYPTO_TFM_MODE_CBC;
 603         else if (strncmp("ecb(", algname, 4) == 0)
 604                 flag |= CRYPTO_TFM_MODE_ECB;
 605         if (flag) {
 606                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 607                 if (vp) {
 608                         memcpy(buf, algname + 4, vp - algname - 4);
 609                         buf[vp - algname - 4] = '\0';
 610                         pan = buf;
 611                 } else {
 612                         flag = 0;
 613                 }
 614         }
 615         return crypto_alloc_tfm(pan, flag);
 616 }
 617
 618 static inline
 619 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 620 {
 621         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 622         const char *pan = alg;
 623
 624         if (strncmp("hmac(", alg, 5) == 0) {
 625                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 626                 if (vp) {
 627                         memcpy(buf, alg+ 5, vp - alg- 5);
 628                         buf[vp - alg - 5] = 0x00;
 629                         pan = buf;
 630                 }
 631         }
 632         return crypto_alloc_tfm(pan, 0);
 633 }
 634 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 635 {
 636        crypto_digest_init(desc->tfm); return 0;
 637 }
 638 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 639                                         struct scatterlist *sg,
 640                                         unsigned int nbytes)
 641 {
 642         struct scatterlist *sl = sg;
 643         unsigned int        count;
 644                 /*
 645                  * This way is very weakness. We must ensure that
 646                  * the sum of sg[0..i]->length isn't greater than nbytes.
 647                  * In the upstream kernel the crypto_hash_update() also
 648                  * via the nbytes computed the count of sg[...].
 649                  * The old style is more safely. but it gone.
 650                  */
 651         for (count = 0; nbytes > 0; count ++, sl ++) {
 652                 nbytes -= sl->length;
 653         }
 654         crypto_digest_update(desc->tfm, sg, count); return 0;
 655 }
 656 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 657 {
 658         crypto_digest_final(desc->tfm, out); return 0;
 659 }
 660 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 661                                  u8 *key, unsigned int *keylen,
 662                                  struct scatterlist *sg,
 663                                  unsigned int nbytes,
 664                                  u8 *out)
 665 {
 666         struct scatterlist *sl = sg;
 667         int                 count;
 668         for (count = 0; nbytes > 0; count ++, sl ++) {
 669                 nbytes -= sl->length;
 670         }
 671         crypto_hmac(tfm, key, keylen, sg, count, out);
 672         return 0;
 673 }
 674
 675 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 676 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 677 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 678 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 679 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 680 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 681 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 682 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 683 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 684 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 685
 686 #ifdef HAVE_FILE_REMOVE_SUID
 687 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 688 #else
 689 # ifdef HAVE_SECURITY_PLUG
 690 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 691 # else
 692 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 693 # endif
 694 #endif
 695
 696 #ifdef HAVE_SECURITY_PLUG
 697 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 698 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 699 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 700 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 701 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 702                 vfs_mknod(dir,entry,mnt,mode,dev)
 703 #define ll_security_inode_unlink(dir,entry,mnt)         \
 704                 security_inode_unlink(dir,entry,mnt)
 705 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 706                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 707 #else
 708 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 709 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 710 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 711 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 712 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 713 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 714 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 715                 vfs_rename(old,old_dir,new,new_dir)
 716 #endif /* HAVE_SECURITY_PLUG */
 717
 718 #ifdef for_each_possible_cpu
 719 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 720 #elif defined(for_each_cpu)
 721 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 722 #endif
 723
 724 #ifdef HAVE_BIO_ENDIO_2ARG
 725 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 726 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 727 #else
 728 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 729 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 730 #endif
 731
 732 #ifdef HAVE_FS_STRUCT_USE_PATH
 733 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 734 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 735 #define cfs_path_put(nd)     path_put(&(nd)->path)
 736 #else
 737 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 738 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 739 #define cfs_path_put(nd)     path_release(nd)
 740 #endif
 741
 742 #ifndef abs
 743 static inline int abs(int x)
 744 {
 745         return (x < 0) ? -x : x;
 746 }
 747 #endif
 748
 749 #ifndef labs
 750 static inline long labs(long x)
 751 {
 752         return (x < 0) ? -x : x;
 753 }
 754 #endif /* HAVE_REGISTER_SHRINKER */
 755
 756 #ifdef HAVE_INVALIDATE_INODE_PAGES
 757 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 758 #endif
 759
 760 #ifdef HAVE_INODE_IPRIVATE
 761 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 762 #else
 763 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 764 #endif
 765
 766 #ifndef HAVE_SIMPLE_SETATTR
 767 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 768 #endif
 769
 770 #ifndef SLAB_DESTROY_BY_RCU
 771 #define CFS_SLAB_DESTROY_BY_RCU 0
 772 #else
 773 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 774 #endif
 775
 776 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 777 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 778 #else
 779 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 780 #endif
 781
 782 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 783 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 784 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 785 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 786 #else
 787 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 788 #endif
 789
 790 static inline int
 791 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 792 {
 793         int rc;
 794
 795         if (sb->s_qcop->quota_on) {
 796 #ifdef HAVE_QUOTA_ON_USE_PATH
 797                 struct path path;
 798
 799                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 800                 if (!rc)
 801                         return rc;
 802 #endif
 803                 rc = sb->s_qcop->quota_on(sb, off, ver
 804 #ifdef HAVE_QUOTA_ON_USE_PATH
 805                                             , &path
 806 #else
 807                                             , name
 808 #endif
 809 #ifdef HAVE_QUOTA_ON_5ARGS
 810                                             , remount
 811 #endif
 812                                            );
 813 #ifdef HAVE_QUOTA_ON_USE_PATH
 814                 path_put(&path);
 815 #endif
 816                 return rc;
 817         }
 818         else
 819                 return -ENOSYS;
 820 }
 821
 822 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 823 {
 824         if (sb->s_qcop->quota_off) {
 825                 return sb->s_qcop->quota_off(sb, off
 826 #ifdef HAVE_QUOTA_OFF_3ARGS
 827                                              , remount
 828 #endif
 829                                             );
 830         }
 831         else
 832                 return -ENOSYS;
 833 }
 834
 835 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 836 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 837 #endif
 838
 839 #ifndef HAVE_VFS_DQ_OFF
 840 # define ll_vfs_dq_init             DQUOT_INIT
 841 # define ll_vfs_dq_drop             DQUOT_DROP
 842 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 843 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 844 #else
 845 # define ll_vfs_dq_init             vfs_dq_init
 846 # define ll_vfs_dq_drop             vfs_dq_drop
 847 # define ll_vfs_dq_transfer         vfs_dq_transfer
 848 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 849 #endif
 850
 851 #ifdef HAVE_BDI_INIT
 852 #define ll_bdi_init(bdi)    bdi_init(bdi)
 853 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 854 #else
 855 #define ll_bdi_init(bdi)    0
 856 #define ll_bdi_destroy(bdi) do { } while(0)
 857 #endif
 858
 859 #ifdef HAVE_NEW_BACKING_DEV_INFO
 860 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 861 #else
 862 # define ll_bdi_wb_cnt(bdi) 1
 863 #endif
 864
 865 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 866 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 867 #endif
 868
 869 #ifndef HAVE_BLKDEV_GET_BY_DEV
 870 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 871 #endif
 872
 873 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 874 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 875 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 876 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 877 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 878 #endif
 879
 880 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 881 #define blk_queue_max_segments(rq, seg)                      \
 882         do { blk_queue_max_phys_segments(rq, seg);           \
 883              blk_queue_max_hw_segments(rq, seg); } while (0)
 884 #else
 885 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 886 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 887 #endif
 888
 889
 890 #ifndef HAVE_BI_HW_SEGMENTS
 891 #define bio_hw_segments(q, bio) 0
 892 #endif
 893
 894 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 895 #define pagevec_lru_add_file pagevec_lru_add
 896 #endif
 897
 898 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 899 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 900         add_to_page_cache_lru(pg, mapping, off, gfp)
 901 #define ll_pagevec_init(pv, cold)       do {} while (0)
 902 #define ll_pagevec_add(pv, pg)          (0)
 903 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 904 #else
 905 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 906         add_to_page_cache(pg, mapping, off, gfp)
 907 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 908 #define ll_pagevec_add(pv, pg)          pagevec_add(pv, pg)
 909 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 910 #endif
 911
 912 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 913 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 914 #define HAVE_NODE_TO_CPUMASK
 915 #endif
 916
 917 #ifndef QUOTA_OK
 918 # define QUOTA_OK 0
 919 #endif
 920 #ifndef NO_QUOTA
 921 # define NO_QUOTA (-EDQUOT)
 922 #endif
 923
 924 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 925 # define ext2_set_bit             __test_and_set_bit_le
 926 # define ext2_clear_bit           __test_and_clear_bit_le
 927 # define ext2_test_bit            test_bit_le
 928 # define ext2_find_first_zero_bit find_first_zero_bit_le
 929 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 930 #endif
 931
 932 #ifdef ATTR_TIMES_SET
 933 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 934 #else
 935 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 936 #endif
 937
 938 #endif /* __KERNEL__ */
 939 #endif /* _COMPAT25_H */