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 #include <linux/fs_struct.h>
  43 #include <linux/namei.h>
  44 #include <libcfs/linux/portals_compat25.h>
  45
  46 #include <linux/lustre_patchless_compat.h>
  47
  48 /* Some old kernels (like 2.6.9) may not define such SEEK_XXX. So the
  49  * definition allows to compile lustre client on more OS platforms. */
  50 #ifndef SEEK_SET
  51  #define SEEK_SET 0
  52  #define SEEK_CUR 1
  53  #define SEEK_END 2
  54 #endif
  55
  56 #ifdef HAVE_FS_STRUCT_RWLOCK
  57 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  58 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  59 #else
  60 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  61 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  62 #endif
  63
  64 #ifdef HAVE_FS_STRUCT_USE_PATH
  65 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  66                                  struct dentry *dentry)
  67 {
  68         struct path path;
  69         struct path old_pwd;
  70
  71         path.mnt = mnt;
  72         path.dentry = dentry;
  73         LOCK_FS_STRUCT(fs);
  74         old_pwd = fs->pwd;
  75         path_get(&path);
  76         fs->pwd = path;
  77         UNLOCK_FS_STRUCT(fs);
  78
  79         if (old_pwd.dentry)
  80                 path_put(&old_pwd);
  81 }
  82
  83 #else
  84
  85 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  86                 struct dentry *dentry)
  87 {
  88         struct dentry *old_pwd;
  89         struct vfsmount *old_pwdmnt;
  90
  91         LOCK_FS_STRUCT(fs);
  92         old_pwd = fs->pwd;
  93         old_pwdmnt = fs->pwdmnt;
  94         fs->pwdmnt = mntget(mnt);
  95         fs->pwd = dget(dentry);
  96         UNLOCK_FS_STRUCT(fs);
  97
  98         if (old_pwd) {
  99                 dput(old_pwd);
 100                 mntput(old_pwdmnt);
 101         }
 102 }
 103 #endif
 104
 105 /*
 106  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 107  * ATTR_* attributes (see bug 13828)
 108  */
 109 #define ATTR_BLOCKS    (1 << 27)
 110
 111 #define current_ngroups current_cred()->group_info->ngroups
 112 #define current_groups current_cred()->group_info->small_block
 113
 114 #ifndef page_private
 115 #define page_private(page) ((page)->private)
 116 #define set_page_private(page, v) ((page)->private = (v))
 117 #endif
 118
 119 #define ll_kernel_locked()      kernel_locked()
 120
 121 /*
 122  * OBD need working random driver, thus all our
 123  * initialization routines must be called after device
 124  * driver initialization
 125  */
 126 #ifndef MODULE
 127 #undef module_init
 128 #define module_init(a)     late_initcall(a)
 129 #endif
 130
 131 /* XXX our code should be using the 2.6 calls, not the other way around */
 132 #ifdef HAVE_TRYLOCK_PAGE
 133 #define TestSetPageLocked(page)         (!trylock_page(page))
 134 #endif
 135
 136 #define Page_Uptodate(page)             PageUptodate(page)
 137 #define ll_redirty_page(page)           set_page_dirty(page)
 138
 139 #define KDEVT_INIT(val)                 (val)
 140
 141 #define LTIME_S(time)                   (time.tv_sec)
 142 #define ll_path_lookup                  path_lookup
 143
 144 #ifdef HAVE_EXPORT_INODE_PERMISSION
 145 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 146 #else
 147 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 148 #endif
 149
 150 #ifdef HAVE_GENERIC_PERMISSION_4ARGS
 151 #define ll_generic_permission(inode, mask, flags, check_acl) \
 152         generic_permission(inode, mask, flags, check_acl)
 153 #else
 154 #define ll_generic_permission(inode, mask, flags, check_acl) \
 155         generic_permission(inode, mask, check_acl)
 156 #endif
 157
 158 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 159 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 160 #define ll_call_writepage(inode, page)  \
 161                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 162 #define ll_invalidate_inode_pages(inode) \
 163                                 invalidate_inode_pages((inode)->i_mapping)
 164
 165 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 166 #define ll_dev_t                        dev_t
 167 #define kdev_t                          dev_t
 168 #define to_kdev_t(dev)                  (dev)
 169 #define kdev_t_to_nr(dev)               (dev)
 170 #define val_to_kdev(dev)                (dev)
 171
 172 #ifdef HAVE_BLKDEV_PUT_2ARGS
 173 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 174 #else
 175 #define ll_blkdev_put(a, b) blkdev_put(a)
 176 #endif
 177
 178 #ifdef HAVE_DENTRY_OPEN_4ARGS
 179 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 180 #else
 181 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 182 #endif
 183
 184 #include <linux/writeback.h>
 185
 186 static inline int cfs_cleanup_group_info(void)
 187 {
 188         struct group_info *ginfo;
 189
 190         ginfo = groups_alloc(0);
 191         if (!ginfo)
 192                 return -ENOMEM;
 193
 194         set_current_groups(ginfo);
 195         put_group_info(ginfo);
 196
 197         return 0;
 198 }
 199
 200 #define __set_page_ll_data(page, llap) \
 201         do {       \
 202                 page_cache_get(page); \
 203                 SetPagePrivate(page); \
 204                 set_page_private(page, (unsigned long)llap); \
 205         } while (0)
 206 #define __clear_page_ll_data(page) \
 207         do {       \
 208                 ClearPagePrivate(page); \
 209                 set_page_private(page, 0); \
 210                 page_cache_release(page); \
 211         } while(0)
 212
 213 #define kiobuf bio
 214
 215 #include <linux/proc_fs.h>
 216
 217 #define CheckWriteback(page, cmd) \
 218         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 219          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 220
 221 #ifdef HAVE_PAGE_LIST
 222 static inline int mapping_has_pages(struct address_space *mapping)
 223 {
 224         int rc = 1;
 225
 226         ll_pgcache_lock(mapping);
 227         if (cfs_list_empty(&mapping->dirty_pages) &&
 228             cfs_list_empty(&mapping->clean_pages) &&
 229             cfs_list_empty(&mapping->locked_pages)) {
 230                 rc = 0;
 231         }
 232         ll_pgcache_unlock(mapping);
 233
 234         return rc;
 235 }
 236 #else
 237 static inline int mapping_has_pages(struct address_space *mapping)
 238 {
 239         return mapping->nrpages > 0;
 240 }
 241 #endif
 242
 243 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 244 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 245 #else
 246 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 247 #endif
 248
 249 #ifdef HAVE_SECURITY_PLUG
 250 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 251                 vfs_symlink(dir, dentry, mnt, path, mode)
 252 #else
 253 #ifdef HAVE_4ARGS_VFS_SYMLINK
 254 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 255                 vfs_symlink(dir, dentry, path, mode)
 256 #else
 257 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 258                        vfs_symlink(dir, dentry, path)
 259 #endif
 260
 261 #endif
 262
 263 #ifndef container_of
 264 #define container_of(ptr, type, member) ({                      \
 265                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 266                 (type *)( (char *)__mptr - offsetof(type,member) );})
 267 #endif
 268
 269 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 270 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 271 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 272
 273 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 274 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 275 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 276
 277 #include <linux/mpage.h>        /* for generic_writepages */
 278
 279 #ifdef HAVE_HIDE_VFSMOUNT_GUTS
 280 # include <../fs/mount.h>
 281 #else
 282 # define real_mount(mnt)        (mnt)
 283 #endif
 284
 285 static inline const char *mnt_get_devname(struct vfsmount *mnt)
 286 {
 287         return real_mount(mnt)->mnt_devname;
 288 }
 289
 290 #ifndef HAVE_ATOMIC_MNT_COUNT
 291 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 292 {
 293 #ifdef CONFIG_SMP
 294         unsigned int count = 0;
 295         int cpu;
 296
 297         for_each_possible_cpu(cpu) {
 298                 count += per_cpu_ptr(real_mount(mnt)->mnt_pcp, cpu)->mnt_count;
 299         }
 300
 301         return count;
 302 #else
 303         return real_mount(mnt)->mnt_count;
 304 #endif
 305 }
 306 #else
 307 # define mnt_get_count(mnt)      cfs_atomic_read(&(real_mount(mnt)->mnt_count))
 308 #endif
 309
 310 #ifdef HAVE_STATFS_DENTRY_PARAM
 311 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 312 #else
 313 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 314 #endif
 315
 316 #ifdef HAVE_RW_TREE_LOCK
 317 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 318 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 319 #else
 320 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 321 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 322 #endif
 323
 324 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 325 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 326 #else
 327 static inline
 328 int ll_unregister_blkdev(unsigned int dev, const char *name)
 329 {
 330         unregister_blkdev(dev, name);
 331         return 0;
 332 }
 333 #endif
 334
 335 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 336 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 337 #else
 338 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 339 #endif
 340
 341 #ifdef HAVE_INODE_BLKSIZE
 342 #define ll_inode_blksize(a)     (a)->i_blksize
 343 #else
 344 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 345 #endif
 346
 347 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 348 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 349 #else
 350 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 351 #endif
 352
 353 #ifndef HAVE_D_OBTAIN_ALIAS
 354 /* The old d_alloc_anon() didn't free the inode reference on error
 355  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 356 static inline struct dentry *d_obtain_alias(struct inode *inode)
 357 {
 358         struct dentry *anon = d_alloc_anon(inode);
 359
 360         if (anon == NULL) {
 361                 iput(inode);
 362                 anon = ERR_PTR(-ENOMEM);
 363         }
 364
 365         return anon;
 366 }
 367 #endif
 368
 369 /* add a lustre compatible layer for crypto API */
 370 #include <linux/crypto.h>
 371 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 372 #define ll_crypto_hash          crypto_hash
 373 #define ll_crypto_cipher        crypto_blkcipher
 374 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 375 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 376 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 377 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 378 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 379 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 380                 crypto_blkcipher_setkey(tfm, key, keylen)
 381 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 382                 crypto_blkcipher_set_iv(tfm, src, len)
 383 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 384                 crypto_blkcipher_get_iv(tfm, dst, len)
 385 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 386                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 387 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 388                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 389 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 390                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 391 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 392                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 393
 394 static inline
 395 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 396                                                    u32 type, u32 mask)
 397 {
 398         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 399
 400         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 401 }
 402
 403 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 404                                  u8 *key, unsigned int *keylen,
 405                                  struct scatterlist *sg,
 406                                  unsigned int size, u8 *result)
 407 {
 408         struct hash_desc desc;
 409         int              rv;
 410         desc.tfm   = tfm;
 411         desc.flags = 0;
 412         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 413         if (rv) {
 414                 CERROR("failed to hash setkey: %d\n", rv);
 415                 return rv;
 416         }
 417         return crypto_hash_digest(&desc, sg, size, result);
 418 }
 419 static inline
 420 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 421 {
 422         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 423 }
 424 static inline
 425 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 426 {
 427         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 428 }
 429
 430 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 431 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 432 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 433 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 434 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 435 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 436 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 437 #include <linux/scatterlist.h>
 438 #define ll_crypto_hash          crypto_tfm
 439 #define ll_crypto_cipher        crypto_tfm
 440 #ifndef HAVE_STRUCT_HASH_DESC
 441 struct hash_desc {
 442         struct ll_crypto_hash *tfm;
 443         u32                    flags;
 444 };
 445 #endif
 446 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 447 struct blkcipher_desc {
 448         struct ll_crypto_cipher *tfm;
 449         void                    *info;
 450         u32                      flags;
 451 };
 452 #endif
 453 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 454         crypto_cipher_setkey(tfm, key, keylen)
 455 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 456         crypto_cipher_set_iv(tfm, src, len)
 457 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 458         crypto_cipher_get_iv(tfm, dst, len)
 459 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 460         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 461 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 462         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 463 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 464         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 465 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 466         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 467
 468 static inline
 469 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 470                                                    u32 type, u32 mask)
 471 {
 472         struct ll_crypto_cipher *rtn;
 473         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 474         const char              *pan = algname;
 475         u32                      flag = 0;
 476
 477         if (strncmp("cbc(", algname, 4) == 0)
 478                 flag |= CRYPTO_TFM_MODE_CBC;
 479         else if (strncmp("ecb(", algname, 4) == 0)
 480                 flag |= CRYPTO_TFM_MODE_ECB;
 481         if (flag) {
 482                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 483                 if (vp) {
 484                         memcpy(buf, algname + 4, vp - algname - 4);
 485                         buf[vp - algname - 4] = '\0';
 486                         pan = buf;
 487                 } else {
 488                         flag = 0;
 489                 }
 490         }
 491         rtn = crypto_alloc_tfm(pan, flag);
 492         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 493 }
 494
 495 static inline
 496 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 497 {
 498         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 499         const char *pan = alg;
 500
 501         if (strncmp("hmac(", alg, 5) == 0) {
 502                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 503                 if (vp) {
 504                         memcpy(buf, alg+ 5, vp - alg- 5);
 505                         buf[vp - alg - 5] = 0x00;
 506                         pan = buf;
 507                 }
 508         }
 509         return crypto_alloc_tfm(pan, 0);
 510 }
 511 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 512 {
 513        crypto_digest_init(desc->tfm); return 0;
 514 }
 515 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 516                                         struct scatterlist *sg,
 517                                         unsigned int nbytes)
 518 {
 519         struct scatterlist *sl = sg;
 520         unsigned int        count;
 521                 /*
 522                  * This way is very weakness. We must ensure that
 523                  * the sum of sg[0..i]->length isn't greater than nbytes.
 524                  * In the upstream kernel the crypto_hash_update() also
 525                  * via the nbytes computed the count of sg[...].
 526                  * The old style is more safely. but it gone.
 527                  */
 528         for (count = 0; nbytes > 0; count ++, sl ++) {
 529                 nbytes -= sl->length;
 530         }
 531         crypto_digest_update(desc->tfm, sg, count); return 0;
 532 }
 533 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 534 {
 535         crypto_digest_final(desc->tfm, out); return 0;
 536 }
 537 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 538                                  u8 *key, unsigned int *keylen,
 539                                  struct scatterlist *sg,
 540                                  unsigned int nbytes,
 541                                  u8 *out)
 542 {
 543         struct scatterlist *sl = sg;
 544         int                 count;
 545         for (count = 0; nbytes > 0; count ++, sl ++) {
 546                 nbytes -= sl->length;
 547         }
 548         crypto_hmac(tfm, key, keylen, sg, count, out);
 549         return 0;
 550 }
 551
 552 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 553 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 554 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 555 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 556 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 557 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 558 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 559 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 560 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 561 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 562
 563 #ifdef HAVE_FILE_REMOVE_SUID
 564 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 565 #else
 566 # ifdef HAVE_SECURITY_PLUG
 567 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 568 # else
 569 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 570 # endif
 571 #endif
 572
 573 #ifdef HAVE_SECURITY_PLUG
 574 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 575 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 576 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 577 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 578 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 579                 vfs_mknod(dir,entry,mnt,mode,dev)
 580 #define ll_security_inode_unlink(dir,entry,mnt)         \
 581                 security_inode_unlink(dir,entry,mnt)
 582 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 583                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 584 #else
 585 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 586 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 587 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 588 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 589 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 590 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 591 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 592                 vfs_rename(old,old_dir,new,new_dir)
 593 #endif /* HAVE_SECURITY_PLUG */
 594
 595 #ifdef for_each_possible_cpu
 596 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 597 #elif defined(for_each_cpu)
 598 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 599 #endif
 600
 601 #ifdef HAVE_BIO_ENDIO_2ARG
 602 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 603 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 604 #else
 605 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 606 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 607 #endif
 608
 609 #ifdef HAVE_FS_STRUCT_USE_PATH
 610 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 611 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 612 #define cfs_path_put(nd)     path_put(&(nd)->path)
 613 #else
 614 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 615 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 616 #define cfs_path_put(nd)     path_release(nd)
 617 #endif
 618
 619 #ifndef abs
 620 static inline int abs(int x)
 621 {
 622         return (x < 0) ? -x : x;
 623 }
 624 #endif
 625
 626 #ifndef labs
 627 static inline long labs(long x)
 628 {
 629         return (x < 0) ? -x : x;
 630 }
 631 #endif /* HAVE_REGISTER_SHRINKER */
 632
 633 #ifdef HAVE_INVALIDATE_INODE_PAGES
 634 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 635 #endif
 636
 637 #ifndef HAVE_SIMPLE_SETATTR
 638 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 639 #endif
 640
 641 #ifndef SLAB_DESTROY_BY_RCU
 642 #define CFS_SLAB_DESTROY_BY_RCU 0
 643 #else
 644 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 645 #endif
 646
 647 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 648 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 649 #else
 650 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 651 #endif
 652
 653 #ifdef HAVE_SB_ANY_QUOTA_LOADED
 654 #define ll_sb_any_quota_active(sb) sb_any_quota_loaded(sb)
 655 #elif defined(HAVE_SB_ANY_QUOTA_ACTIVE)
 656 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 657 #else
 658 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 659 #endif
 660
 661 static inline int
 662 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 663 {
 664         int rc;
 665
 666         if (sb->s_qcop->quota_on) {
 667 #ifdef HAVE_QUOTA_ON_USE_PATH
 668                 struct path path;
 669
 670                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 671                 if (!rc)
 672                         return rc;
 673 #endif
 674                 rc = sb->s_qcop->quota_on(sb, off, ver
 675 #ifdef HAVE_QUOTA_ON_USE_PATH
 676                                             , &path
 677 #else
 678                                             , name
 679 #endif
 680 #ifdef HAVE_QUOTA_ON_5ARGS
 681                                             , remount
 682 #endif
 683                                            );
 684 #ifdef HAVE_QUOTA_ON_USE_PATH
 685                 path_put(&path);
 686 #endif
 687                 return rc;
 688         }
 689         else
 690                 return -ENOSYS;
 691 }
 692
 693 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 694 {
 695         if (sb->s_qcop->quota_off) {
 696                 return sb->s_qcop->quota_off(sb, off
 697 #ifdef HAVE_QUOTA_OFF_3ARGS
 698                                              , remount
 699 #endif
 700                                             );
 701         }
 702         else
 703                 return -ENOSYS;
 704 }
 705
 706 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 707 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 708 #endif
 709
 710 #ifndef HAVE_VFS_DQ_OFF
 711 # define ll_vfs_dq_init             DQUOT_INIT
 712 # define ll_vfs_dq_drop             DQUOT_DROP
 713 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 714 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 715 #else
 716 # define ll_vfs_dq_init             vfs_dq_init
 717 # define ll_vfs_dq_drop             vfs_dq_drop
 718 # define ll_vfs_dq_transfer         vfs_dq_transfer
 719 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 720 #endif
 721
 722 #ifdef HAVE_BDI_INIT
 723 #define ll_bdi_init(bdi)    bdi_init(bdi)
 724 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 725 #else
 726 #define ll_bdi_init(bdi)    0
 727 #define ll_bdi_destroy(bdi) do { } while(0)
 728 #endif
 729
 730 #ifdef HAVE_NEW_BACKING_DEV_INFO
 731 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 732 #else
 733 # define ll_bdi_wb_cnt(bdi) 1
 734 #endif
 735
 736 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 737 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 738 #endif
 739
 740 #ifndef HAVE_BLKDEV_GET_BY_DEV
 741 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 742 #endif
 743
 744 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 745 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 746 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 747 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 748 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 749 #endif
 750
 751 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 752 #define blk_queue_max_segments(rq, seg)                      \
 753         do { blk_queue_max_phys_segments(rq, seg);           \
 754              blk_queue_max_hw_segments(rq, seg); } while (0)
 755 #else
 756 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 757 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 758 #endif
 759
 760
 761 #ifndef HAVE_BI_HW_SEGMENTS
 762 #define bio_hw_segments(q, bio) 0
 763 #endif
 764
 765 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 766 #define pagevec_lru_add_file pagevec_lru_add
 767 #endif
 768
 769 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 770 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 771         add_to_page_cache_lru(pg, mapping, off, gfp)
 772 #define ll_pagevec_init(pv, cold)       do {} while (0)
 773 #define ll_pagevec_add(pv, pg)          (0)
 774 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 775 #else
 776 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 777         add_to_page_cache(pg, mapping, off, gfp)
 778 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 779 #define ll_pagevec_add(pv, pg)                                  \
 780 ({                                                              \
 781         int __ret;                                              \
 782                                                                 \
 783         page_cache_get(pg);                                     \
 784         __ret = pagevec_add(pv, pg);                            \
 785 })
 786 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 787 #endif
 788
 789 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 790 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 791 #define HAVE_NODE_TO_CPUMASK
 792 #endif
 793
 794 #ifndef QUOTA_OK
 795 # define QUOTA_OK 0
 796 #endif
 797 #ifndef NO_QUOTA
 798 # define NO_QUOTA (-EDQUOT)
 799 #endif
 800
 801 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 802 # define ext2_set_bit             __test_and_set_bit_le
 803 # define ext2_clear_bit           __test_and_clear_bit_le
 804 # define ext2_test_bit            test_bit_le
 805 # define ext2_find_first_zero_bit find_first_zero_bit_le
 806 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 807 #endif
 808
 809 #ifdef ATTR_TIMES_SET
 810 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 811 #else
 812 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 813 #endif
 814
 815 #ifndef HAVE_SELINUX_IS_ENABLED
 816 static inline bool selinux_is_enabled(void)
 817 {
 818         return 0;
 819 }
 820 #endif
 821
 822 #endif /* __KERNEL__ */
 823 #endif /* _COMPAT25_H */