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 #ifdef HAVE_RW_TREE_LOCK
 347 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 348 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 349 #else
 350 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 351 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 352 #endif
 353
 354 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 355 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 356 #else
 357 static inline
 358 int ll_unregister_blkdev(unsigned int dev, const char *name)
 359 {
 360         unregister_blkdev(dev, name);
 361         return 0;
 362 }
 363 #endif
 364
 365 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 366 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 367 #else
 368 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 369 #endif
 370
 371 #ifdef HAVE_INODE_BLKSIZE
 372 #define ll_inode_blksize(a)     (a)->i_blksize
 373 #else
 374 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 375 #endif
 376
 377 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 378 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 379 #else
 380 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 381 #endif
 382
 383 #ifndef HAVE_D_OBTAIN_ALIAS
 384 /* The old d_alloc_anon() didn't free the inode reference on error
 385  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 386 static inline struct dentry *d_obtain_alias(struct inode *inode)
 387 {
 388         struct dentry *anon = d_alloc_anon(inode);
 389
 390         if (anon == NULL) {
 391                 iput(inode);
 392                 anon = ERR_PTR(-ENOMEM);
 393         }
 394
 395         return anon;
 396 }
 397 #endif
 398
 399 /* add a lustre compatible layer for crypto API */
 400 #include <linux/crypto.h>
 401 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 402 #define ll_crypto_hash          crypto_hash
 403 #define ll_crypto_cipher        crypto_blkcipher
 404 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 405 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 406 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 407 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 408 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 409 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 410                 crypto_blkcipher_setkey(tfm, key, keylen)
 411 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 412                 crypto_blkcipher_set_iv(tfm, src, len)
 413 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 414                 crypto_blkcipher_get_iv(tfm, dst, len)
 415 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 416                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 417 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 418                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 419 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 420                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 421 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 422                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 423
 424 static inline
 425 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 426                                                    u32 type, u32 mask)
 427 {
 428         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 429
 430         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 431 }
 432
 433 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 434                                  u8 *key, unsigned int *keylen,
 435                                  struct scatterlist *sg,
 436                                  unsigned int size, u8 *result)
 437 {
 438         struct hash_desc desc;
 439         int              rv;
 440         desc.tfm   = tfm;
 441         desc.flags = 0;
 442         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 443         if (rv) {
 444                 CERROR("failed to hash setkey: %d\n", rv);
 445                 return rv;
 446         }
 447         return crypto_hash_digest(&desc, sg, size, result);
 448 }
 449 static inline
 450 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 451 {
 452         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 453 }
 454 static inline
 455 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 456 {
 457         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 458 }
 459
 460 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 461 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 462 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 463 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 464 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 465 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 466 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 467 #include <linux/scatterlist.h>
 468 #define ll_crypto_hash          crypto_tfm
 469 #define ll_crypto_cipher        crypto_tfm
 470 #ifndef HAVE_STRUCT_HASH_DESC
 471 struct hash_desc {
 472         struct ll_crypto_hash *tfm;
 473         u32                    flags;
 474 };
 475 #endif
 476 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 477 struct blkcipher_desc {
 478         struct ll_crypto_cipher *tfm;
 479         void                    *info;
 480         u32                      flags;
 481 };
 482 #endif
 483 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 484         crypto_cipher_setkey(tfm, key, keylen)
 485 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 486         crypto_cipher_set_iv(tfm, src, len)
 487 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 488         crypto_cipher_get_iv(tfm, dst, len)
 489 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 490         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 491 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 492         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 493 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 494         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 495 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 496         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 497
 498 static inline
 499 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 500                                                    u32 type, u32 mask)
 501 {
 502         struct ll_crypto_cipher *rtn;
 503         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 504         const char              *pan = algname;
 505         u32                      flag = 0;
 506
 507         if (strncmp("cbc(", algname, 4) == 0)
 508                 flag |= CRYPTO_TFM_MODE_CBC;
 509         else if (strncmp("ecb(", algname, 4) == 0)
 510                 flag |= CRYPTO_TFM_MODE_ECB;
 511         if (flag) {
 512                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 513                 if (vp) {
 514                         memcpy(buf, algname + 4, vp - algname - 4);
 515                         buf[vp - algname - 4] = '\0';
 516                         pan = buf;
 517                 } else {
 518                         flag = 0;
 519                 }
 520         }
 521         rtn = crypto_alloc_tfm(pan, flag);
 522         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 523 }
 524
 525 static inline
 526 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 527 {
 528         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 529         const char *pan = alg;
 530
 531         if (strncmp("hmac(", alg, 5) == 0) {
 532                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 533                 if (vp) {
 534                         memcpy(buf, alg+ 5, vp - alg- 5);
 535                         buf[vp - alg - 5] = 0x00;
 536                         pan = buf;
 537                 }
 538         }
 539         return crypto_alloc_tfm(pan, 0);
 540 }
 541 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 542 {
 543        crypto_digest_init(desc->tfm); return 0;
 544 }
 545 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 546                                         struct scatterlist *sg,
 547                                         unsigned int nbytes)
 548 {
 549         struct scatterlist *sl = sg;
 550         unsigned int        count;
 551                 /*
 552                  * This way is very weakness. We must ensure that
 553                  * the sum of sg[0..i]->length isn't greater than nbytes.
 554                  * In the upstream kernel the crypto_hash_update() also
 555                  * via the nbytes computed the count of sg[...].
 556                  * The old style is more safely. but it gone.
 557                  */
 558         for (count = 0; nbytes > 0; count ++, sl ++) {
 559                 nbytes -= sl->length;
 560         }
 561         crypto_digest_update(desc->tfm, sg, count); return 0;
 562 }
 563 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 564 {
 565         crypto_digest_final(desc->tfm, out); return 0;
 566 }
 567 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 568                                  u8 *key, unsigned int *keylen,
 569                                  struct scatterlist *sg,
 570                                  unsigned int nbytes,
 571                                  u8 *out)
 572 {
 573         struct scatterlist *sl = sg;
 574         int                 count;
 575         for (count = 0; nbytes > 0; count ++, sl ++) {
 576                 nbytes -= sl->length;
 577         }
 578         crypto_hmac(tfm, key, keylen, sg, count, out);
 579         return 0;
 580 }
 581
 582 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 583 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 584 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 585 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 586 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 587 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 588 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 589 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 590 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 591 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 592
 593 #ifdef HAVE_FILE_REMOVE_SUID
 594 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 595 #else
 596 # ifdef HAVE_SECURITY_PLUG
 597 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 598 # else
 599 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 600 # endif
 601 #endif
 602
 603 #ifdef HAVE_SECURITY_PLUG
 604 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 605 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 606 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 607 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 608 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 609                 vfs_mknod(dir,entry,mnt,mode,dev)
 610 #define ll_security_inode_unlink(dir,entry,mnt)         \
 611                 security_inode_unlink(dir,entry,mnt)
 612 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 613                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 614 #else
 615 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 616 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 617 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 618 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 619 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 620 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 621 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 622                 vfs_rename(old,old_dir,new,new_dir)
 623 #endif /* HAVE_SECURITY_PLUG */
 624
 625 #ifdef for_each_possible_cpu
 626 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 627 #elif defined(for_each_cpu)
 628 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 629 #endif
 630
 631 #ifdef HAVE_BIO_ENDIO_2ARG
 632 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 633 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 634 #else
 635 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 636 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 637 #endif
 638
 639 #ifdef HAVE_FS_STRUCT_USE_PATH
 640 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 641 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 642 #define cfs_path_put(nd)     path_put(&(nd)->path)
 643 #else
 644 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 645 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 646 #define cfs_path_put(nd)     path_release(nd)
 647 #endif
 648
 649 #ifndef abs
 650 static inline int abs(int x)
 651 {
 652         return (x < 0) ? -x : x;
 653 }
 654 #endif
 655
 656 #ifndef labs
 657 static inline long labs(long x)
 658 {
 659         return (x < 0) ? -x : x;
 660 }
 661 #endif /* HAVE_REGISTER_SHRINKER */
 662
 663 #ifdef HAVE_INVALIDATE_INODE_PAGES
 664 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 665 #endif
 666
 667 #ifdef HAVE_INODE_IPRIVATE
 668 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 669 #else
 670 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 671 #endif
 672
 673 #ifndef HAVE_SIMPLE_SETATTR
 674 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 675 #endif
 676
 677 #ifndef SLAB_DESTROY_BY_RCU
 678 #define CFS_SLAB_DESTROY_BY_RCU 0
 679 #else
 680 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 681 #endif
 682
 683 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 684 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 685 #else
 686 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 687 #endif
 688
 689 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 690 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 691 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 692 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 693 #else
 694 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 695 #endif
 696
 697 static inline int
 698 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 699 {
 700         int rc;
 701
 702         if (sb->s_qcop->quota_on) {
 703 #ifdef HAVE_QUOTA_ON_USE_PATH
 704                 struct path path;
 705
 706                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 707                 if (!rc)
 708                         return rc;
 709 #endif
 710                 rc = sb->s_qcop->quota_on(sb, off, ver
 711 #ifdef HAVE_QUOTA_ON_USE_PATH
 712                                             , &path
 713 #else
 714                                             , name
 715 #endif
 716 #ifdef HAVE_QUOTA_ON_5ARGS
 717                                             , remount
 718 #endif
 719                                            );
 720 #ifdef HAVE_QUOTA_ON_USE_PATH
 721                 path_put(&path);
 722 #endif
 723                 return rc;
 724         }
 725         else
 726                 return -ENOSYS;
 727 }
 728
 729 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 730 {
 731         if (sb->s_qcop->quota_off) {
 732                 return sb->s_qcop->quota_off(sb, off
 733 #ifdef HAVE_QUOTA_OFF_3ARGS
 734                                              , remount
 735 #endif
 736                                             );
 737         }
 738         else
 739                 return -ENOSYS;
 740 }
 741
 742 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 743 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 744 #endif
 745
 746 #ifndef HAVE_VFS_DQ_OFF
 747 # define ll_vfs_dq_init             DQUOT_INIT
 748 # define ll_vfs_dq_drop             DQUOT_DROP
 749 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 750 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 751 #else
 752 # define ll_vfs_dq_init             vfs_dq_init
 753 # define ll_vfs_dq_drop             vfs_dq_drop
 754 # define ll_vfs_dq_transfer         vfs_dq_transfer
 755 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 756 #endif
 757
 758 #ifdef HAVE_BDI_INIT
 759 #define ll_bdi_init(bdi)    bdi_init(bdi)
 760 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 761 #else
 762 #define ll_bdi_init(bdi)    0
 763 #define ll_bdi_destroy(bdi) do { } while(0)
 764 #endif
 765
 766 #ifdef HAVE_NEW_BACKING_DEV_INFO
 767 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 768 #else
 769 # define ll_bdi_wb_cnt(bdi) 1
 770 #endif
 771
 772 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 773 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 774 #endif
 775
 776 #ifndef HAVE_BLKDEV_GET_BY_DEV
 777 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 778 #endif
 779
 780 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 781 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 782 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 783 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 784 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 785 #endif
 786
 787 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 788 #define blk_queue_max_segments(rq, seg)                      \
 789         do { blk_queue_max_phys_segments(rq, seg);           \
 790              blk_queue_max_hw_segments(rq, seg); } while (0)
 791 #else
 792 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 793 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 794 #endif
 795
 796
 797 #ifndef HAVE_BI_HW_SEGMENTS
 798 #define bio_hw_segments(q, bio) 0
 799 #endif
 800
 801 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 802 #define pagevec_lru_add_file pagevec_lru_add
 803 #endif
 804
 805 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 806 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 807         add_to_page_cache_lru(pg, mapping, off, gfp)
 808 #define ll_pagevec_init(pv, cold)       do {} while (0)
 809 #define ll_pagevec_add(pv, pg)          (0)
 810 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 811 #else
 812 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 813         add_to_page_cache(pg, mapping, off, gfp)
 814 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 815 #define ll_pagevec_add(pv, pg)                                  \
 816 ({                                                              \
 817         int __ret;                                              \
 818                                                                 \
 819         page_cache_get(pg);                                     \
 820         __ret = pagevec_add(pv, pg);                            \
 821 })
 822 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 823 #endif
 824
 825 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 826 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 827 #define HAVE_NODE_TO_CPUMASK
 828 #endif
 829
 830 #ifndef QUOTA_OK
 831 # define QUOTA_OK 0
 832 #endif
 833 #ifndef NO_QUOTA
 834 # define NO_QUOTA (-EDQUOT)
 835 #endif
 836
 837 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 838 # define ext2_set_bit             __test_and_set_bit_le
 839 # define ext2_clear_bit           __test_and_clear_bit_le
 840 # define ext2_test_bit            test_bit_le
 841 # define ext2_find_first_zero_bit find_first_zero_bit_le
 842 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 843 #endif
 844
 845 #ifdef ATTR_TIMES_SET
 846 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 847 #else
 848 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 849 #endif
 850
 851 #ifndef HAVE_SELINUX_IS_ENABLED
 852 static inline bool selinux_is_enabled(void)
 853 {
 854         return 0;
 855 }
 856 #endif
 857
 858 #endif /* __KERNEL__ */
 859 #endif /* _COMPAT25_H */