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 #ifdef HAVE_INODE_DIO_WAIT
 176 /* inode_dio_wait(i) use as-is for write lock */
 177 # define inode_dio_write_done(i)        do {} while (0) /* for write unlock */
 178 # define inode_dio_read(i)              atomic_inc(&(i)->i_dio_count)
 179 /* inode_dio_done(i) use as-is for read unlock */
 180 #else
 181 # define inode_dio_wait(i)              down_write(&(i)->i_alloc_sem)
 182 # define inode_dio_write_done(i)        up_write(&(i)->i_alloc_sem)
 183 # define inode_dio_read(i)              down_read(&(i)->i_alloc_sem)
 184 # define inode_dio_done(i)              up_read(&(i)->i_alloc_sem)
 185 #endif
 186
 187 #include <linux/mpage.h>        /* for generic_writepages */
 188
 189 #ifdef HAVE_HIDE_VFSMOUNT_GUTS
 190 # include <../fs/mount.h>
 191 #else
 192 # define real_mount(mnt)        (mnt)
 193 #endif
 194
 195 static inline const char *mnt_get_devname(struct vfsmount *mnt)
 196 {
 197         return real_mount(mnt)->mnt_devname;
 198 }
 199
 200 #ifndef HAVE_ATOMIC_MNT_COUNT
 201 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 202 {
 203 #ifdef CONFIG_SMP
 204         unsigned int count = 0;
 205         int cpu;
 206
 207         for_each_possible_cpu(cpu) {
 208                 count += per_cpu_ptr(real_mount(mnt)->mnt_pcp, cpu)->mnt_count;
 209         }
 210
 211         return count;
 212 #else
 213         return real_mount(mnt)->mnt_count;
 214 #endif
 215 }
 216 #else
 217 # define mnt_get_count(mnt)      cfs_atomic_read(&(real_mount(mnt)->mnt_count))
 218 #endif
 219
 220 #ifdef HAVE_RW_TREE_LOCK
 221 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 222 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 223 #else
 224 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 225 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 226 #endif
 227
 228 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 229 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 230 #else
 231 static inline
 232 int ll_unregister_blkdev(unsigned int dev, const char *name)
 233 {
 234         unregister_blkdev(dev, name);
 235         return 0;
 236 }
 237 #endif
 238
 239 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 240 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 241 #else
 242 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 243 #endif
 244
 245 #ifndef FS_HAS_FIEMAP
 246 #define FS_HAS_FIEMAP                   (0)
 247 #endif
 248
 249 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 250 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 251 #endif
 252
 253 #ifndef HAVE_D_OBTAIN_ALIAS
 254 /* The old d_alloc_anon() didn't free the inode reference on error
 255  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 256 static inline struct dentry *d_obtain_alias(struct inode *inode)
 257 {
 258         struct dentry *anon = d_alloc_anon(inode);
 259
 260         if (anon == NULL) {
 261                 iput(inode);
 262                 anon = ERR_PTR(-ENOMEM);
 263         }
 264
 265         return anon;
 266 }
 267 #endif
 268
 269 /* add a lustre compatible layer for crypto API */
 270 #include <linux/crypto.h>
 271 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 272 #define ll_crypto_hash          crypto_hash
 273 #define ll_crypto_cipher        crypto_blkcipher
 274 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 275 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 276 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 277 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 278 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 279 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 280                 crypto_blkcipher_setkey(tfm, key, keylen)
 281 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 282                 crypto_blkcipher_set_iv(tfm, src, len)
 283 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 284                 crypto_blkcipher_get_iv(tfm, dst, len)
 285 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 286                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 287 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 288                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 289 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 290                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 291 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 292                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 293
 294 static inline
 295 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 296                                                    u32 type, u32 mask)
 297 {
 298         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 299
 300         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 301 }
 302
 303 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 304                                  u8 *key, unsigned int *keylen,
 305                                  struct scatterlist *sg,
 306                                  unsigned int size, u8 *result)
 307 {
 308         struct hash_desc desc;
 309         int              rv;
 310         desc.tfm   = tfm;
 311         desc.flags = 0;
 312         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 313         if (rv) {
 314                 CERROR("failed to hash setkey: %d\n", rv);
 315                 return rv;
 316         }
 317         return crypto_hash_digest(&desc, sg, size, result);
 318 }
 319 static inline
 320 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 321 {
 322         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 323 }
 324 static inline
 325 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 326 {
 327         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 328 }
 329
 330 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 331 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 332 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 333 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 334 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 335 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 336 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 337 #include <linux/scatterlist.h>
 338 #define ll_crypto_hash          crypto_tfm
 339 #define ll_crypto_cipher        crypto_tfm
 340 #ifndef HAVE_STRUCT_HASH_DESC
 341 struct hash_desc {
 342         struct ll_crypto_hash *tfm;
 343         u32                    flags;
 344 };
 345 #endif
 346 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 347 struct blkcipher_desc {
 348         struct ll_crypto_cipher *tfm;
 349         void                    *info;
 350         u32                      flags;
 351 };
 352 #endif
 353 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 354         crypto_cipher_setkey(tfm, key, keylen)
 355 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 356         crypto_cipher_set_iv(tfm, src, len)
 357 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 358         crypto_cipher_get_iv(tfm, dst, len)
 359 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 360         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 361 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 362         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 363 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 364         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 365 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 366         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 367
 368 static inline
 369 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 370                                                    u32 type, u32 mask)
 371 {
 372         struct ll_crypto_cipher *rtn;
 373         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 374         const char              *pan = algname;
 375         u32                      flag = 0;
 376
 377         if (strncmp("cbc(", algname, 4) == 0)
 378                 flag |= CRYPTO_TFM_MODE_CBC;
 379         else if (strncmp("ecb(", algname, 4) == 0)
 380                 flag |= CRYPTO_TFM_MODE_ECB;
 381         if (flag) {
 382                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 383                 if (vp) {
 384                         memcpy(buf, algname + 4, vp - algname - 4);
 385                         buf[vp - algname - 4] = '\0';
 386                         pan = buf;
 387                 } else {
 388                         flag = 0;
 389                 }
 390         }
 391         rtn = crypto_alloc_tfm(pan, flag);
 392         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 393 }
 394
 395 static inline
 396 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 397 {
 398         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 399         const char *pan = alg;
 400
 401         if (strncmp("hmac(", alg, 5) == 0) {
 402                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 403                 if (vp) {
 404                         memcpy(buf, alg+ 5, vp - alg- 5);
 405                         buf[vp - alg - 5] = 0x00;
 406                         pan = buf;
 407                 }
 408         }
 409         return crypto_alloc_tfm(pan, 0);
 410 }
 411 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 412 {
 413        crypto_digest_init(desc->tfm); return 0;
 414 }
 415 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 416                                         struct scatterlist *sg,
 417                                         unsigned int nbytes)
 418 {
 419         struct scatterlist *sl = sg;
 420         unsigned int        count;
 421                 /*
 422                  * This way is very weakness. We must ensure that
 423                  * the sum of sg[0..i]->length isn't greater than nbytes.
 424                  * In the upstream kernel the crypto_hash_update() also
 425                  * via the nbytes computed the count of sg[...].
 426                  * The old style is more safely. but it gone.
 427                  */
 428         for (count = 0; nbytes > 0; count ++, sl ++) {
 429                 nbytes -= sl->length;
 430         }
 431         crypto_digest_update(desc->tfm, sg, count); return 0;
 432 }
 433 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 434 {
 435         crypto_digest_final(desc->tfm, out); return 0;
 436 }
 437 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 438                                  u8 *key, unsigned int *keylen,
 439                                  struct scatterlist *sg,
 440                                  unsigned int nbytes,
 441                                  u8 *out)
 442 {
 443         struct scatterlist *sl = sg;
 444         int                 count;
 445         for (count = 0; nbytes > 0; count ++, sl ++) {
 446                 nbytes -= sl->length;
 447         }
 448         crypto_hmac(tfm, key, keylen, sg, count, out);
 449         return 0;
 450 }
 451
 452 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 453 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 454 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 455 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 456 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 457 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 458 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 459 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 460 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 461 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 462
 463 #ifdef HAVE_SECURITY_PLUG
 464 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 465 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 466 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 467 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 468 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 469                 vfs_mknod(dir,entry,mnt,mode,dev)
 470 #define ll_security_inode_unlink(dir,entry,mnt)         \
 471                 security_inode_unlink(dir,entry,mnt)
 472 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 473                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 474 #else
 475 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 476 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 477 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 478 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 479 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 480 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 481 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 482                 vfs_rename(old,old_dir,new,new_dir)
 483 #endif /* HAVE_SECURITY_PLUG */
 484
 485 #ifdef for_each_possible_cpu
 486 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 487 #elif defined(for_each_cpu)
 488 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 489 #endif
 490
 491 #ifdef HAVE_BIO_ENDIO_2ARG
 492 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 493 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 494 #else
 495 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 496 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 497 #endif
 498
 499 #ifdef HAVE_FS_STRUCT_USE_PATH
 500 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 501 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 502 #define cfs_path_put(nd)     path_put(&(nd)->path)
 503 #else
 504 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 505 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 506 #define cfs_path_put(nd)     path_release(nd)
 507 #endif
 508
 509 #ifndef HAVE_SIMPLE_SETATTR
 510 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 511 #endif
 512
 513 #ifndef SLAB_DESTROY_BY_RCU
 514 #define SLAB_DESTROY_BY_RCU 0
 515 #endif
 516
 517 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
 518 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 519 #endif
 520
 521 #ifndef HAVE_SB_ANY_QUOTA_LOADED
 522 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 523 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
 524 # else
 525 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
 526 # endif
 527 #endif
 528
 529 static inline int
 530 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 531 {
 532         int rc;
 533
 534         if (sb->s_qcop->quota_on) {
 535 #ifdef HAVE_QUOTA_ON_USE_PATH
 536                 struct path path;
 537
 538                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 539                 if (!rc)
 540                         return rc;
 541 #endif
 542                 rc = sb->s_qcop->quota_on(sb, off, ver
 543 #ifdef HAVE_QUOTA_ON_USE_PATH
 544                                             , &path
 545 #else
 546                                             , name
 547 #endif
 548 #ifdef HAVE_QUOTA_ON_5ARGS
 549                                             , remount
 550 #endif
 551                                            );
 552 #ifdef HAVE_QUOTA_ON_USE_PATH
 553                 path_put(&path);
 554 #endif
 555                 return rc;
 556         }
 557         else
 558                 return -ENOSYS;
 559 }
 560
 561 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 562 {
 563         if (sb->s_qcop->quota_off) {
 564                 return sb->s_qcop->quota_off(sb, off
 565 #ifdef HAVE_QUOTA_OFF_3ARGS
 566                                              , remount
 567 #endif
 568                                             );
 569         }
 570         else
 571                 return -ENOSYS;
 572 }
 573
 574 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 575 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 576 #endif
 577
 578 #ifndef HAVE_VFS_DQ_OFF
 579 # define ll_vfs_dq_init             DQUOT_INIT
 580 # define ll_vfs_dq_drop             DQUOT_DROP
 581 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 582 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 583 #else
 584 # define ll_vfs_dq_init             vfs_dq_init
 585 # define ll_vfs_dq_drop             vfs_dq_drop
 586 # define ll_vfs_dq_transfer         vfs_dq_transfer
 587 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 588 #endif
 589
 590 #ifdef HAVE_BDI_INIT
 591 #define ll_bdi_init(bdi)    bdi_init(bdi)
 592 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 593 #else
 594 #define ll_bdi_init(bdi)    0
 595 #define ll_bdi_destroy(bdi) do { } while(0)
 596 #endif
 597
 598 #ifdef HAVE_NEW_BACKING_DEV_INFO
 599 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 600 #else
 601 # define ll_bdi_wb_cnt(bdi) 1
 602 #endif
 603
 604 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 605 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 606 #endif
 607
 608 #ifndef HAVE_BLKDEV_GET_BY_DEV
 609 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 610 #endif
 611
 612 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 613 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 614 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 615 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 616 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 617 #endif
 618
 619 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 620 #define blk_queue_max_segments(rq, seg)                      \
 621         do { blk_queue_max_phys_segments(rq, seg);           \
 622              blk_queue_max_hw_segments(rq, seg); } while (0)
 623 #else
 624 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 625 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 626 #endif
 627
 628
 629 #ifndef HAVE_BI_HW_SEGMENTS
 630 #define bio_hw_segments(q, bio) 0
 631 #endif
 632
 633 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 634 #define pagevec_lru_add_file pagevec_lru_add
 635 #endif
 636
 637 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 638 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 639         add_to_page_cache_lru(pg, mapping, off, gfp)
 640 #define ll_pagevec_init(pv, cold)       do {} while (0)
 641 #define ll_pagevec_add(pv, pg)          (0)
 642 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 643 #else
 644 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 645         add_to_page_cache(pg, mapping, off, gfp)
 646 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 647 #define ll_pagevec_add(pv, pg)                                  \
 648 ({                                                              \
 649         int __ret;                                              \
 650                                                                 \
 651         page_cache_get(pg);                                     \
 652         __ret = pagevec_add(pv, pg);                            \
 653 })
 654 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 655 #endif
 656
 657 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 658 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 659 #define HAVE_NODE_TO_CPUMASK
 660 #endif
 661
 662 #ifndef QUOTA_OK
 663 # define QUOTA_OK 0
 664 #endif
 665 #ifndef NO_QUOTA
 666 # define NO_QUOTA (-EDQUOT)
 667 #endif
 668
 669 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 670 # define ext2_set_bit             __test_and_set_bit_le
 671 # define ext2_clear_bit           __test_and_clear_bit_le
 672 # define ext2_test_bit            test_bit_le
 673 # define ext2_find_first_zero_bit find_first_zero_bit_le
 674 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 675 #endif
 676
 677 #ifdef ATTR_TIMES_SET
 678 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 679 #else
 680 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 681 #endif
 682
 683 #ifndef HAVE_SELINUX_IS_ENABLED
 684 static inline bool selinux_is_enabled(void)
 685 {
 686         return 0;
 687 }
 688 #endif
 689
 690 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 691 # define lm_compare_owner       fl_compare_owner
 692 #endif
 693
 694 /*
 695  * After 3.1, kernel's nameidata.intent.open.flags is different
 696  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
 697  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
 698  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
 699  * */
 700 #include <linux/version.h>
 701 static inline int ll_namei_to_lookup_intent_flag(int flag)
 702 {
 703 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
 704         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
 705 #endif
 706         return flag;
 707 }
 708
 709 #ifdef HAVE_VOID_MAKE_REQUEST_FN
 710 # define ll_mrf_ret void
 711 # define LL_MRF_RETURN(rc)
 712 #else
 713 # define ll_mrf_ret int
 714 # define LL_MRF_RETURN(rc) RETURN(rc)
 715 #endif
 716
 717 #include <linux/fs.h>
 718 #ifndef HAVE_PROTECT_I_NLINK
 719 static inline void set_nlink(struct inode *inode, unsigned int nlink)
 720 {
 721         inode->i_nlink = nlink;
 722 }
 723 #endif
 724
 725 #endif /* _COMPAT25_H */