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, Intel Corporation.
  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)     write_lock(&(fs)->lock)
  48 # define UNLOCK_FS_STRUCT(fs)   write_unlock(&(fs)->lock)
  49 #else
  50 # define LOCK_FS_STRUCT(fs)     spin_lock(&(fs)->lock)
  51 # define UNLOCK_FS_STRUCT(fs)   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 static inline struct file *ll_dentry_open(struct dentry *dentry,
 144                                           struct vfsmount *mnt, int flags,
 145                                           const struct cred *cred)
 146 {
 147 #ifdef HAVE_DENTRY_OPEN_USE_PATH
 148         struct path path = { .mnt = mnt, .dentry = dentry };
 149         return dentry_open(&path, flags, cred);
 150 #elif defined HAVE_DENTRY_OPEN_4ARGS
 151         return dentry_open(dentry, mnt, flags, cred);
 152 #else
 153         return dentry_open(dentry, mnt, flags);
 154 #endif
 155 }
 156
 157 #ifdef HAVE_SECURITY_PLUG
 158 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 159                 vfs_symlink(dir, dentry, mnt, path, mode)
 160 #else
 161 #ifdef HAVE_4ARGS_VFS_SYMLINK
 162 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 163                 vfs_symlink(dir, dentry, path, mode)
 164 #else
 165 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 166                        vfs_symlink(dir, dentry, path)
 167 #endif
 168
 169 #endif
 170
 171 #ifdef HAVE_INODE_DIO_WAIT
 172 /* inode_dio_wait(i) use as-is for write lock */
 173 # define inode_dio_write_done(i)        do {} while (0) /* for write unlock */
 174 # define inode_dio_read(i)              atomic_inc(&(i)->i_dio_count)
 175 /* inode_dio_done(i) use as-is for read unlock */
 176 #else
 177 # define inode_dio_wait(i)              down_write(&(i)->i_alloc_sem)
 178 # define inode_dio_write_done(i)        up_write(&(i)->i_alloc_sem)
 179 # define inode_dio_read(i)              down_read(&(i)->i_alloc_sem)
 180 # define inode_dio_done(i)              up_read(&(i)->i_alloc_sem)
 181 #endif
 182
 183 #ifdef HAVE_RW_TREE_LOCK
 184 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 185 #define TREE_READ_UNLOCK_IRQ(mapping)   read_unlock_irq(&(mapping)->tree_lock)
 186 #else
 187 #define TREE_READ_LOCK_IRQ(mapping)     spin_lock_irq(&(mapping)->tree_lock)
 188 #define TREE_READ_UNLOCK_IRQ(mapping)   spin_unlock_irq(&(mapping)->tree_lock)
 189 #endif
 190
 191 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 192 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 193 #else
 194 static inline
 195 int ll_unregister_blkdev(unsigned int dev, const char *name)
 196 {
 197         unregister_blkdev(dev, name);
 198         return 0;
 199 }
 200 #endif
 201
 202 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 203 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 204 #else
 205 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 206 #endif
 207
 208 #ifndef FS_HAS_FIEMAP
 209 #define FS_HAS_FIEMAP                   (0)
 210 #endif
 211
 212 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 213 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 214 #endif
 215
 216 #ifndef HAVE_D_OBTAIN_ALIAS
 217 /* The old d_alloc_anon() didn't free the inode reference on error
 218  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 219 static inline struct dentry *d_obtain_alias(struct inode *inode)
 220 {
 221         struct dentry *anon = d_alloc_anon(inode);
 222
 223         if (anon == NULL) {
 224                 iput(inode);
 225                 anon = ERR_PTR(-ENOMEM);
 226         }
 227
 228         return anon;
 229 }
 230 #endif
 231
 232 /* add a lustre compatible layer for crypto API */
 233 #include <linux/crypto.h>
 234 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 235 #define ll_crypto_hash          crypto_hash
 236 #define ll_crypto_cipher        crypto_blkcipher
 237 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 238 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 239 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 240 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 241 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 242 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 243                 crypto_blkcipher_setkey(tfm, key, keylen)
 244 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 245                 crypto_blkcipher_set_iv(tfm, src, len)
 246 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 247                 crypto_blkcipher_get_iv(tfm, dst, len)
 248 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 249                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 250 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 251                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 252 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 253                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 254 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 255                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 256
 257 static inline
 258 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 259                                                    u32 type, u32 mask)
 260 {
 261         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 262
 263         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 264 }
 265
 266 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 267                                  u8 *key, unsigned int *keylen,
 268                                  struct scatterlist *sg,
 269                                  unsigned int size, u8 *result)
 270 {
 271         struct hash_desc desc;
 272         int              rv;
 273         desc.tfm   = tfm;
 274         desc.flags = 0;
 275         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 276         if (rv) {
 277                 CERROR("failed to hash setkey: %d\n", rv);
 278                 return rv;
 279         }
 280         return crypto_hash_digest(&desc, sg, size, result);
 281 }
 282 static inline
 283 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 284 {
 285         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 286 }
 287 static inline
 288 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 289 {
 290         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 291 }
 292
 293 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 294 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 295 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 296 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 297 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 298 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 299 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 300 #include <linux/scatterlist.h>
 301 #define ll_crypto_hash          crypto_tfm
 302 #define ll_crypto_cipher        crypto_tfm
 303 #ifndef HAVE_STRUCT_HASH_DESC
 304 struct hash_desc {
 305         struct ll_crypto_hash *tfm;
 306         u32                    flags;
 307 };
 308 #endif
 309 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 310 struct blkcipher_desc {
 311         struct ll_crypto_cipher *tfm;
 312         void                    *info;
 313         u32                      flags;
 314 };
 315 #endif
 316 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 317         crypto_cipher_setkey(tfm, key, keylen)
 318 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 319         crypto_cipher_set_iv(tfm, src, len)
 320 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 321         crypto_cipher_get_iv(tfm, dst, len)
 322 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 323         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 324 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 325         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 326 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 327         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 328 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 329         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 330
 331 static inline
 332 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 333                                                    u32 type, u32 mask)
 334 {
 335         struct ll_crypto_cipher *rtn;
 336         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 337         const char              *pan = algname;
 338         u32                      flag = 0;
 339
 340         if (strncmp("cbc(", algname, 4) == 0)
 341                 flag |= CRYPTO_TFM_MODE_CBC;
 342         else if (strncmp("ecb(", algname, 4) == 0)
 343                 flag |= CRYPTO_TFM_MODE_ECB;
 344         if (flag) {
 345                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 346                 if (vp) {
 347                         memcpy(buf, algname + 4, vp - algname - 4);
 348                         buf[vp - algname - 4] = '\0';
 349                         pan = buf;
 350                 } else {
 351                         flag = 0;
 352                 }
 353         }
 354         rtn = crypto_alloc_tfm(pan, flag);
 355         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 356 }
 357
 358 static inline
 359 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 360 {
 361         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 362         const char *pan = alg;
 363
 364         if (strncmp("hmac(", alg, 5) == 0) {
 365                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 366                 if (vp) {
 367                         memcpy(buf, alg+ 5, vp - alg- 5);
 368                         buf[vp - alg - 5] = 0x00;
 369                         pan = buf;
 370                 }
 371         }
 372         return crypto_alloc_tfm(pan, 0);
 373 }
 374 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 375 {
 376        crypto_digest_init(desc->tfm); return 0;
 377 }
 378 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 379                                         struct scatterlist *sg,
 380                                         unsigned int nbytes)
 381 {
 382         struct scatterlist *sl = sg;
 383         unsigned int        count;
 384                 /*
 385                  * This way is very weakness. We must ensure that
 386                  * the sum of sg[0..i]->length isn't greater than nbytes.
 387                  * In the upstream kernel the crypto_hash_update() also
 388                  * via the nbytes computed the count of sg[...].
 389                  * The old style is more safely. but it gone.
 390                  */
 391         for (count = 0; nbytes > 0; count ++, sl ++) {
 392                 nbytes -= sl->length;
 393         }
 394         crypto_digest_update(desc->tfm, sg, count); return 0;
 395 }
 396 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 397 {
 398         crypto_digest_final(desc->tfm, out); return 0;
 399 }
 400 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 401                                  u8 *key, unsigned int *keylen,
 402                                  struct scatterlist *sg,
 403                                  unsigned int nbytes,
 404                                  u8 *out)
 405 {
 406         struct scatterlist *sl = sg;
 407         int                 count;
 408         for (count = 0; nbytes > 0; count ++, sl ++) {
 409                 nbytes -= sl->length;
 410         }
 411         crypto_hmac(tfm, key, keylen, sg, count, out);
 412         return 0;
 413 }
 414
 415 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 416 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 417 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 418 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 419 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 420 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 421 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 422 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 423 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 424 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 425
 426 #ifdef HAVE_SECURITY_PLUG
 427 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 428 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 429 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 430 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 431 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 432                 vfs_mknod(dir,entry,mnt,mode,dev)
 433 #define ll_security_inode_unlink(dir,entry,mnt)         \
 434                 security_inode_unlink(dir,entry,mnt)
 435 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 436                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 437 #else
 438 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 439 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 440 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 441 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 442 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 443 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 444 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 445                 vfs_rename(old,old_dir,new,new_dir)
 446 #endif /* HAVE_SECURITY_PLUG */
 447
 448 #ifdef for_each_possible_cpu
 449 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 450 #elif defined(for_each_cpu)
 451 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 452 #endif
 453
 454 #ifdef HAVE_BIO_ENDIO_2ARG
 455 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 456 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 457 #else
 458 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 459 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 460 #endif
 461
 462 #ifdef HAVE_FS_STRUCT_USE_PATH
 463 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 464 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 465 #define cfs_path_put(nd)     path_put(&(nd)->path)
 466 #else
 467 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 468 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 469 #define cfs_path_put(nd)     path_release(nd)
 470 #endif
 471
 472 #ifndef HAVE_SIMPLE_SETATTR
 473 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 474 #endif
 475
 476 #ifndef SLAB_DESTROY_BY_RCU
 477 #define SLAB_DESTROY_BY_RCU 0
 478 #endif
 479
 480 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
 481 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 482 #endif
 483
 484 #ifndef HAVE_SB_ANY_QUOTA_LOADED
 485 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 486 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
 487 # else
 488 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
 489 # endif
 490 #endif
 491
 492 static inline int
 493 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 494 {
 495         int rc;
 496
 497         if (sb->s_qcop->quota_on) {
 498 #ifdef HAVE_QUOTA_ON_USE_PATH
 499                 struct path path;
 500
 501                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 502                 if (!rc)
 503                         return rc;
 504 #endif
 505                 rc = sb->s_qcop->quota_on(sb, off, ver
 506 #ifdef HAVE_QUOTA_ON_USE_PATH
 507                                             , &path
 508 #else
 509                                             , name
 510 #endif
 511 #ifdef HAVE_QUOTA_ON_5ARGS
 512                                             , remount
 513 #endif
 514                                            );
 515 #ifdef HAVE_QUOTA_ON_USE_PATH
 516                 path_put(&path);
 517 #endif
 518                 return rc;
 519         }
 520         else
 521                 return -ENOSYS;
 522 }
 523
 524 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 525 {
 526         if (sb->s_qcop->quota_off) {
 527                 return sb->s_qcop->quota_off(sb, off
 528 #ifdef HAVE_QUOTA_OFF_3ARGS
 529                                              , remount
 530 #endif
 531                                             );
 532         }
 533         else
 534                 return -ENOSYS;
 535 }
 536
 537 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 538 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 539 #endif
 540
 541 #ifndef HAVE_VFS_DQ_OFF
 542 # define ll_vfs_dq_init             DQUOT_INIT
 543 # define ll_vfs_dq_drop             DQUOT_DROP
 544 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 545 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 546 #else
 547 # define ll_vfs_dq_init             vfs_dq_init
 548 # define ll_vfs_dq_drop             vfs_dq_drop
 549 # define ll_vfs_dq_transfer         vfs_dq_transfer
 550 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 551 #endif
 552
 553 #ifndef HAVE_BDI_INIT
 554 #define bdi_init(bdi)    0
 555 #define bdi_destroy(bdi) do { } while (0)
 556 #endif
 557
 558 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 559 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 560 #endif
 561
 562 #ifndef HAVE_BLKDEV_GET_BY_DEV
 563 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 564 #endif
 565
 566 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 567 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 568 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 569 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 570 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 571 #endif
 572
 573 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 574 #define blk_queue_max_segments(rq, seg)                      \
 575         do { blk_queue_max_phys_segments(rq, seg);           \
 576              blk_queue_max_hw_segments(rq, seg); } while (0)
 577 #else
 578 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 579 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 580 #endif
 581
 582 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
 583 #define ll_kmap_atomic(a, b)    kmap_atomic(a)
 584 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a)
 585 #else
 586 #define ll_kmap_atomic(a, b)    kmap_atomic(a, b)
 587 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a, b)
 588 #endif
 589
 590 #ifndef HAVE_CLEAR_INODE
 591 #define clear_inode(i)          end_writeback(i)
 592 #endif
 593
 594 #ifdef HAVE_DENTRY_D_ALIAS_HLIST
 595 #define ll_d_hlist_node hlist_node
 596 #define ll_d_hlist_empty(list) hlist_empty(list)
 597 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
 598 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
 599 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 600         hlist_for_each_entry(dentry, p, i_dentry, alias)
 601 #else
 602 #define ll_d_hlist_node list_head
 603 #define ll_d_hlist_empty(list) list_empty(list)
 604 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
 605 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
 606 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 607         p = NULL; list_for_each_entry(dentry, i_dentry, alias)
 608 #endif
 609
 610
 611 #ifndef HAVE_BI_HW_SEGMENTS
 612 #define bio_hw_segments(q, bio) 0
 613 #endif
 614
 615 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 616 #define pagevec_lru_add_file pagevec_lru_add
 617 #endif
 618
 619 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 620 #define ll_pagevec_init(pv, cold)       do {} while (0)
 621 #define ll_pagevec_add(pv, pg)          (0)
 622 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 623 #else
 624 #define add_to_page_cache_lru(pg, mapping, off, gfp) \
 625         add_to_page_cache(pg, mapping, off, gfp)
 626 #define ll_pagevec_init(pv, cold)       pagevec_init(pv, cold);
 627 #define ll_pagevec_add(pv, pg)                                  \
 628 ({                                                              \
 629         int __ret;                                              \
 630                                                                 \
 631         page_cache_get(pg);                                     \
 632         __ret = pagevec_add(pv, pg);                            \
 633 })
 634 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 635 #endif
 636
 637 #if !defined(HAVE_CPUMASK_OF_NODE) && defined(HAVE_NODE_TO_CPUMASK)
 638 # ifdef HAVE_OFED_CPUMASK_OF_NODE
 639 # undef cpumask_of_node
 640 # define HAVE_CPUMASK_OF_NODE
 641 # endif
 642 #define cpumask_of_node(i)      (&node_to_cpumask(i))
 643 #endif
 644
 645 #ifndef QUOTA_OK
 646 # define QUOTA_OK 0
 647 #endif
 648 #ifndef NO_QUOTA
 649 # define NO_QUOTA (-EDQUOT)
 650 #endif
 651
 652 #ifndef SEEK_DATA
 653 #define SEEK_DATA      3       /* seek to the next data */
 654 #endif
 655 #ifndef SEEK_HOLE
 656 #define SEEK_HOLE      4       /* seek to the next hole */
 657 #endif
 658
 659 #ifndef FMODE_UNSIGNED_OFFSET
 660 #define FMODE_UNSIGNED_OFFSET   ((__force fmode_t)0x2000)
 661 #endif
 662
 663 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 664 # define ext2_set_bit             __test_and_set_bit_le
 665 # define ext2_clear_bit           __test_and_clear_bit_le
 666 # define ext2_test_bit            test_bit_le
 667 # define ext2_find_first_zero_bit find_first_zero_bit_le
 668 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 669 #endif
 670
 671 #ifdef ATTR_TIMES_SET
 672 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 673 #else
 674 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 675 #endif
 676
 677 #ifndef HAVE_SELINUX_IS_ENABLED
 678 static inline bool selinux_is_enabled(void)
 679 {
 680         return 0;
 681 }
 682 #endif
 683
 684 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 685 # define lm_compare_owner       fl_compare_owner
 686 #endif
 687
 688 /*
 689  * After 3.1, kernel's nameidata.intent.open.flags is different
 690  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
 691  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
 692  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
 693  * */
 694 #include <linux/version.h>
 695 static inline int ll_namei_to_lookup_intent_flag(int flag)
 696 {
 697 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
 698         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
 699 #endif
 700         return flag;
 701 }
 702
 703 #ifdef HAVE_VOID_MAKE_REQUEST_FN
 704 # define ll_mrf_ret void
 705 # define LL_MRF_RETURN(rc)
 706 #else
 707 # define ll_mrf_ret int
 708 # define LL_MRF_RETURN(rc) RETURN(rc)
 709 #endif
 710
 711 #include <linux/fs.h>
 712 #ifndef HAVE_PROTECT_I_NLINK
 713 static inline void set_nlink(struct inode *inode, unsigned int nlink)
 714 {
 715         inode->i_nlink = nlink;
 716 }
 717 #endif
 718
 719 #ifdef HAVE_INODEOPS_USE_UMODE_T
 720 # define ll_umode_t     umode_t
 721 #else
 722 # define ll_umode_t     int
 723 #endif
 724
 725 #include <linux/dcache.h>
 726 #ifndef HAVE_D_MAKE_ROOT
 727 static inline struct dentry *d_make_root(struct inode *root)
 728 {
 729         struct dentry *res = d_alloc_root(root);
 730
 731         if (res == NULL && root)
 732                 iput(root);
 733
 734         return res;
 735 }
 736 #endif
 737
 738 #endif /* _COMPAT25_H */