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 #include <linux/fs_struct.h>
  41 #include <linux/namei.h>
  42 #include <libcfs/linux/portals_compat25.h>
  43
  44 #include <linux/lustre_patchless_compat.h>
  45
  46 #ifdef HAVE_FS_STRUCT_RWLOCK
  47 # define LOCK_FS_STRUCT(fs)   cfs_write_lock(&(fs)->lock)
  48 # define UNLOCK_FS_STRUCT(fs) cfs_write_unlock(&(fs)->lock)
  49 #else
  50 # define LOCK_FS_STRUCT(fs)   cfs_spin_lock(&(fs)->lock)
  51 # define UNLOCK_FS_STRUCT(fs) cfs_spin_unlock(&(fs)->lock)
  52 #endif
  53
  54 #ifdef HAVE_FS_STRUCT_USE_PATH
  55 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  56                                  struct dentry *dentry)
  57 {
  58         struct path path;
  59         struct path old_pwd;
  60
  61         path.mnt = mnt;
  62         path.dentry = dentry;
  63         LOCK_FS_STRUCT(fs);
  64         old_pwd = fs->pwd;
  65         path_get(&path);
  66         fs->pwd = path;
  67         UNLOCK_FS_STRUCT(fs);
  68
  69         if (old_pwd.dentry)
  70                 path_put(&old_pwd);
  71 }
  72
  73 #else
  74
  75 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  76                 struct dentry *dentry)
  77 {
  78         struct dentry *old_pwd;
  79         struct vfsmount *old_pwdmnt;
  80
  81         LOCK_FS_STRUCT(fs);
  82         old_pwd = fs->pwd;
  83         old_pwdmnt = fs->pwdmnt;
  84         fs->pwdmnt = mntget(mnt);
  85         fs->pwd = dget(dentry);
  86         UNLOCK_FS_STRUCT(fs);
  87
  88         if (old_pwd) {
  89                 dput(old_pwd);
  90                 mntput(old_pwdmnt);
  91         }
  92 }
  93 #endif
  94
  95 /*
  96  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
  97  * ATTR_* attributes (see bug 13828)
  98  */
  99 #define ATTR_BLOCKS    (1 << 27)
 100
 101 #define current_ngroups current_cred()->group_info->ngroups
 102 #define current_groups current_cred()->group_info->small_block
 103
 104 /*
 105  * OBD need working random driver, thus all our
 106  * initialization routines must be called after device
 107  * driver initialization
 108  */
 109 #ifndef MODULE
 110 #undef module_init
 111 #define module_init(a)     late_initcall(a)
 112 #endif
 113
 114 #ifndef HAVE_TRYLOCK_PAGE
 115 #define trylock_page(page)              (!TestSetPageLocked(page))
 116 #endif
 117
 118 #define LTIME_S(time)                   (time.tv_sec)
 119
 120 #ifdef HAVE_EXPORT_INODE_PERMISSION
 121 #define ll_permission(inode,mask,nd)    inode_permission(inode,mask)
 122 #else
 123 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 124 #endif
 125
 126 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
 127 # define ll_generic_permission(inode, mask, flags, check_acl) \
 128          generic_permission(inode, mask)
 129 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
 130 # define ll_generic_permission(inode, mask, flags, check_acl) \
 131          generic_permission(inode, mask, flags, check_acl)
 132 #else
 133 # define ll_generic_permission(inode, mask, flags, check_acl) \
 134          generic_permission(inode, mask, check_acl)
 135 #endif
 136
 137 #ifdef HAVE_BLKDEV_PUT_2ARGS
 138 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 139 #else
 140 #define ll_blkdev_put(a, b) blkdev_put(a)
 141 #endif
 142
 143 #ifdef HAVE_DENTRY_OPEN_4ARGS
 144 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 145 #else
 146 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 147 #endif
 148
 149 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 150 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 151 #else
 152 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 153 #endif
 154
 155 #ifdef HAVE_SECURITY_PLUG
 156 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 157                 vfs_symlink(dir, dentry, mnt, path, mode)
 158 #else
 159 #ifdef HAVE_4ARGS_VFS_SYMLINK
 160 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 161                 vfs_symlink(dir, dentry, path, mode)
 162 #else
 163 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 164                        vfs_symlink(dir, dentry, path)
 165 #endif
 166
 167 #endif
 168
 169 #ifndef container_of
 170 #define container_of(ptr, type, member) ({                      \
 171                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 172                 (type *)( (char *)__mptr - offsetof(type,member) );})
 173 #endif
 174
 175 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 176 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 177 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 178
 179 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 180 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 181 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 182
 183 #include <linux/mpage.h>        /* for generic_writepages */
 184
 185 #ifdef HAVE_HIDE_VFSMOUNT_GUTS
 186 # include <../fs/mount.h>
 187 #else
 188 # define real_mount(mnt)        (mnt)
 189 #endif
 190
 191 static inline const char *mnt_get_devname(struct vfsmount *mnt)
 192 {
 193         return real_mount(mnt)->mnt_devname;
 194 }
 195
 196 #ifndef HAVE_ATOMIC_MNT_COUNT
 197 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 198 {
 199 #ifdef CONFIG_SMP
 200         unsigned int count = 0;
 201         int cpu;
 202
 203         for_each_possible_cpu(cpu) {
 204                 count += per_cpu_ptr(real_mount(mnt)->mnt_pcp, cpu)->mnt_count;
 205         }
 206
 207         return count;
 208 #else
 209         return real_mount(mnt)->mnt_count;
 210 #endif
 211 }
 212 #else
 213 # define mnt_get_count(mnt)      cfs_atomic_read(&(real_mount(mnt)->mnt_count))
 214 #endif
 215
 216 #ifdef HAVE_RW_TREE_LOCK
 217 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 218 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 219 #else
 220 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 221 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 222 #endif
 223
 224 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 225 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 226 #else
 227 static inline
 228 int ll_unregister_blkdev(unsigned int dev, const char *name)
 229 {
 230         unregister_blkdev(dev, name);
 231         return 0;
 232 }
 233 #endif
 234
 235 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 236 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 237 #else
 238 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 239 #endif
 240
 241 #ifndef FS_HAS_FIEMAP
 242 #define FS_HAS_FIEMAP                   (0)
 243 #endif
 244
 245 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 246 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 247 #endif
 248
 249 #ifndef HAVE_D_OBTAIN_ALIAS
 250 /* The old d_alloc_anon() didn't free the inode reference on error
 251  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 252 static inline struct dentry *d_obtain_alias(struct inode *inode)
 253 {
 254         struct dentry *anon = d_alloc_anon(inode);
 255
 256         if (anon == NULL) {
 257                 iput(inode);
 258                 anon = ERR_PTR(-ENOMEM);
 259         }
 260
 261         return anon;
 262 }
 263 #endif
 264
 265 /* add a lustre compatible layer for crypto API */
 266 #include <linux/crypto.h>
 267 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 268 #define ll_crypto_hash          crypto_hash
 269 #define ll_crypto_cipher        crypto_blkcipher
 270 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 271 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 272 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 273 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 274 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 275 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 276                 crypto_blkcipher_setkey(tfm, key, keylen)
 277 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 278                 crypto_blkcipher_set_iv(tfm, src, len)
 279 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 280                 crypto_blkcipher_get_iv(tfm, dst, len)
 281 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 282                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 283 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 284                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 285 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 286                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 287 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 288                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 289
 290 static inline
 291 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 292                                                    u32 type, u32 mask)
 293 {
 294         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 295
 296         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 297 }
 298
 299 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 300                                  u8 *key, unsigned int *keylen,
 301                                  struct scatterlist *sg,
 302                                  unsigned int size, u8 *result)
 303 {
 304         struct hash_desc desc;
 305         int              rv;
 306         desc.tfm   = tfm;
 307         desc.flags = 0;
 308         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 309         if (rv) {
 310                 CERROR("failed to hash setkey: %d\n", rv);
 311                 return rv;
 312         }
 313         return crypto_hash_digest(&desc, sg, size, result);
 314 }
 315 static inline
 316 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 317 {
 318         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 319 }
 320 static inline
 321 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 322 {
 323         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 324 }
 325
 326 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 327 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 328 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 329 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 330 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 331 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 332 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 333 #include <linux/scatterlist.h>
 334 #define ll_crypto_hash          crypto_tfm
 335 #define ll_crypto_cipher        crypto_tfm
 336 #ifndef HAVE_STRUCT_HASH_DESC
 337 struct hash_desc {
 338         struct ll_crypto_hash *tfm;
 339         u32                    flags;
 340 };
 341 #endif
 342 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 343 struct blkcipher_desc {
 344         struct ll_crypto_cipher *tfm;
 345         void                    *info;
 346         u32                      flags;
 347 };
 348 #endif
 349 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 350         crypto_cipher_setkey(tfm, key, keylen)
 351 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 352         crypto_cipher_set_iv(tfm, src, len)
 353 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 354         crypto_cipher_get_iv(tfm, dst, len)
 355 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 356         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 357 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 358         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 359 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 360         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 361 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 362         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 363
 364 static inline
 365 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 366                                                    u32 type, u32 mask)
 367 {
 368         struct ll_crypto_cipher *rtn;
 369         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 370         const char              *pan = algname;
 371         u32                      flag = 0;
 372
 373         if (strncmp("cbc(", algname, 4) == 0)
 374                 flag |= CRYPTO_TFM_MODE_CBC;
 375         else if (strncmp("ecb(", algname, 4) == 0)
 376                 flag |= CRYPTO_TFM_MODE_ECB;
 377         if (flag) {
 378                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 379                 if (vp) {
 380                         memcpy(buf, algname + 4, vp - algname - 4);
 381                         buf[vp - algname - 4] = '\0';
 382                         pan = buf;
 383                 } else {
 384                         flag = 0;
 385                 }
 386         }
 387         rtn = crypto_alloc_tfm(pan, flag);
 388         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 389 }
 390
 391 static inline
 392 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 393 {
 394         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 395         const char *pan = alg;
 396
 397         if (strncmp("hmac(", alg, 5) == 0) {
 398                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 399                 if (vp) {
 400                         memcpy(buf, alg+ 5, vp - alg- 5);
 401                         buf[vp - alg - 5] = 0x00;
 402                         pan = buf;
 403                 }
 404         }
 405         return crypto_alloc_tfm(pan, 0);
 406 }
 407 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 408 {
 409        crypto_digest_init(desc->tfm); return 0;
 410 }
 411 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 412                                         struct scatterlist *sg,
 413                                         unsigned int nbytes)
 414 {
 415         struct scatterlist *sl = sg;
 416         unsigned int        count;
 417                 /*
 418                  * This way is very weakness. We must ensure that
 419                  * the sum of sg[0..i]->length isn't greater than nbytes.
 420                  * In the upstream kernel the crypto_hash_update() also
 421                  * via the nbytes computed the count of sg[...].
 422                  * The old style is more safely. but it gone.
 423                  */
 424         for (count = 0; nbytes > 0; count ++, sl ++) {
 425                 nbytes -= sl->length;
 426         }
 427         crypto_digest_update(desc->tfm, sg, count); return 0;
 428 }
 429 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 430 {
 431         crypto_digest_final(desc->tfm, out); return 0;
 432 }
 433 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 434                                  u8 *key, unsigned int *keylen,
 435                                  struct scatterlist *sg,
 436                                  unsigned int nbytes,
 437                                  u8 *out)
 438 {
 439         struct scatterlist *sl = sg;
 440         int                 count;
 441         for (count = 0; nbytes > 0; count ++, sl ++) {
 442                 nbytes -= sl->length;
 443         }
 444         crypto_hmac(tfm, key, keylen, sg, count, out);
 445         return 0;
 446 }
 447
 448 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 449 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 450 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 451 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 452 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 453 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 454 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 455 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 456 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 457 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 458
 459 #ifdef HAVE_SECURITY_PLUG
 460 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 461 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 462 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 463 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 464 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 465                 vfs_mknod(dir,entry,mnt,mode,dev)
 466 #define ll_security_inode_unlink(dir,entry,mnt)         \
 467                 security_inode_unlink(dir,entry,mnt)
 468 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 469                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 470 #else
 471 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 472 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 473 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 474 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 475 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 476 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 477 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 478                 vfs_rename(old,old_dir,new,new_dir)
 479 #endif /* HAVE_SECURITY_PLUG */
 480
 481 #ifdef for_each_possible_cpu
 482 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 483 #elif defined(for_each_cpu)
 484 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 485 #endif
 486
 487 #ifdef HAVE_BIO_ENDIO_2ARG
 488 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 489 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 490 #else
 491 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 492 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 493 #endif
 494
 495 #ifdef HAVE_FS_STRUCT_USE_PATH
 496 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 497 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 498 #define cfs_path_put(nd)     path_put(&(nd)->path)
 499 #else
 500 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 501 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 502 #define cfs_path_put(nd)     path_release(nd)
 503 #endif
 504
 505 #ifndef HAVE_SIMPLE_SETATTR
 506 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 507 #endif
 508
 509 #ifndef SLAB_DESTROY_BY_RCU
 510 #define SLAB_DESTROY_BY_RCU 0
 511 #endif
 512
 513 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
 514 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 515 #endif
 516
 517 #ifndef HAVE_SB_ANY_QUOTA_LOADED
 518 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 519 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
 520 # else
 521 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
 522 # endif
 523 #endif
 524
 525 static inline int
 526 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 527 {
 528         int rc;
 529
 530         if (sb->s_qcop->quota_on) {
 531 #ifdef HAVE_QUOTA_ON_USE_PATH
 532                 struct path path;
 533
 534                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 535                 if (!rc)
 536                         return rc;
 537 #endif
 538                 rc = sb->s_qcop->quota_on(sb, off, ver
 539 #ifdef HAVE_QUOTA_ON_USE_PATH
 540                                             , &path
 541 #else
 542                                             , name
 543 #endif
 544 #ifdef HAVE_QUOTA_ON_5ARGS
 545                                             , remount
 546 #endif
 547                                            );
 548 #ifdef HAVE_QUOTA_ON_USE_PATH
 549                 path_put(&path);
 550 #endif
 551                 return rc;
 552         }
 553         else
 554                 return -ENOSYS;
 555 }
 556
 557 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 558 {
 559         if (sb->s_qcop->quota_off) {
 560                 return sb->s_qcop->quota_off(sb, off
 561 #ifdef HAVE_QUOTA_OFF_3ARGS
 562                                              , remount
 563 #endif
 564                                             );
 565         }
 566         else
 567                 return -ENOSYS;
 568 }
 569
 570 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 571 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 572 #endif
 573
 574 #ifndef HAVE_VFS_DQ_OFF
 575 # define ll_vfs_dq_init             DQUOT_INIT
 576 # define ll_vfs_dq_drop             DQUOT_DROP
 577 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 578 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 579 #else
 580 # define ll_vfs_dq_init             vfs_dq_init
 581 # define ll_vfs_dq_drop             vfs_dq_drop
 582 # define ll_vfs_dq_transfer         vfs_dq_transfer
 583 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 584 #endif
 585
 586 #ifdef HAVE_BDI_INIT
 587 #define ll_bdi_init(bdi)    bdi_init(bdi)
 588 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 589 #else
 590 #define ll_bdi_init(bdi)    0
 591 #define ll_bdi_destroy(bdi) do { } while(0)
 592 #endif
 593
 594 #ifdef HAVE_NEW_BACKING_DEV_INFO
 595 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 596 #else
 597 # define ll_bdi_wb_cnt(bdi) 1
 598 #endif
 599
 600 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 601 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 602 #endif
 603
 604 #ifndef HAVE_BLKDEV_GET_BY_DEV
 605 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 606 #endif
 607
 608 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 609 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 610 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 611 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 612 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 613 #endif
 614
 615 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 616 #define blk_queue_max_segments(rq, seg)                      \
 617         do { blk_queue_max_phys_segments(rq, seg);           \
 618              blk_queue_max_hw_segments(rq, seg); } while (0)
 619 #else
 620 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 621 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 622 #endif
 623
 624
 625 #ifndef HAVE_BI_HW_SEGMENTS
 626 #define bio_hw_segments(q, bio) 0
 627 #endif
 628
 629 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 630 #define pagevec_lru_add_file pagevec_lru_add
 631 #endif
 632
 633 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 634 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 635         add_to_page_cache_lru(pg, mapping, off, gfp)
 636 #define ll_pagevec_init(pv, cold)       do {} while (0)
 637 #define ll_pagevec_add(pv, pg)          (0)
 638 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 639 #else
 640 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 641         add_to_page_cache(pg, mapping, off, gfp)
 642 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 643 #define ll_pagevec_add(pv, pg)                                  \
 644 ({                                                              \
 645         int __ret;                                              \
 646                                                                 \
 647         page_cache_get(pg);                                     \
 648         __ret = pagevec_add(pv, pg);                            \
 649 })
 650 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 651 #endif
 652
 653 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 654 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 655 #define HAVE_NODE_TO_CPUMASK
 656 #endif
 657
 658 #ifndef QUOTA_OK
 659 # define QUOTA_OK 0
 660 #endif
 661 #ifndef NO_QUOTA
 662 # define NO_QUOTA (-EDQUOT)
 663 #endif
 664
 665 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 666 # define ext2_set_bit             __test_and_set_bit_le
 667 # define ext2_clear_bit           __test_and_clear_bit_le
 668 # define ext2_test_bit            test_bit_le
 669 # define ext2_find_first_zero_bit find_first_zero_bit_le
 670 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 671 #endif
 672
 673 #ifdef ATTR_TIMES_SET
 674 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 675 #else
 676 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 677 #endif
 678
 679 #ifndef HAVE_SELINUX_IS_ENABLED
 680 static inline bool selinux_is_enabled(void)
 681 {
 682         return 0;
 683 }
 684 #endif
 685
 686 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 687 # define lm_compare_owner       fl_compare_owner
 688 #endif
 689
 690 #endif /* _COMPAT25_H */