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)     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 #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_SECURITY_PLUG
 150 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 151                 vfs_symlink(dir, dentry, mnt, path, mode)
 152 #else
 153 #ifdef HAVE_4ARGS_VFS_SYMLINK
 154 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 155                 vfs_symlink(dir, dentry, path, mode)
 156 #else
 157 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 158                        vfs_symlink(dir, dentry, path)
 159 #endif
 160
 161 #endif
 162
 163 #ifdef HAVE_INODE_DIO_WAIT
 164 /* inode_dio_wait(i) use as-is for write lock */
 165 # define inode_dio_write_done(i)        do {} while (0) /* for write unlock */
 166 # define inode_dio_read(i)              atomic_inc(&(i)->i_dio_count)
 167 /* inode_dio_done(i) use as-is for read unlock */
 168 #else
 169 # define inode_dio_wait(i)              down_write(&(i)->i_alloc_sem)
 170 # define inode_dio_write_done(i)        up_write(&(i)->i_alloc_sem)
 171 # define inode_dio_read(i)              down_read(&(i)->i_alloc_sem)
 172 # define inode_dio_done(i)              up_read(&(i)->i_alloc_sem)
 173 #endif
 174
 175 #ifdef HAVE_HIDE_VFSMOUNT_GUTS
 176 # include <../fs/mount.h>
 177 #else
 178 # define real_mount(mnt)        (mnt)
 179 #endif
 180
 181 static inline const char *mnt_get_devname(struct vfsmount *mnt)
 182 {
 183         return real_mount(mnt)->mnt_devname;
 184 }
 185
 186 #ifndef HAVE_ATOMIC_MNT_COUNT
 187 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 188 {
 189 #ifdef CONFIG_SMP
 190         unsigned int count = 0;
 191         int cpu;
 192
 193         for_each_possible_cpu(cpu) {
 194                 count += per_cpu_ptr(real_mount(mnt)->mnt_pcp, cpu)->mnt_count;
 195         }
 196
 197         return count;
 198 #else
 199         return real_mount(mnt)->mnt_count;
 200 #endif
 201 }
 202 #else
 203 # define mnt_get_count(mnt)      cfs_atomic_read(&(real_mount(mnt)->mnt_count))
 204 #endif
 205
 206 #ifdef HAVE_RW_TREE_LOCK
 207 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 208 #define TREE_READ_UNLOCK_IRQ(mapping)   read_unlock_irq(&(mapping)->tree_lock)
 209 #else
 210 #define TREE_READ_LOCK_IRQ(mapping)     spin_lock_irq(&(mapping)->tree_lock)
 211 #define TREE_READ_UNLOCK_IRQ(mapping)   spin_unlock_irq(&(mapping)->tree_lock)
 212 #endif
 213
 214 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 215 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 216 #else
 217 static inline
 218 int ll_unregister_blkdev(unsigned int dev, const char *name)
 219 {
 220         unregister_blkdev(dev, name);
 221         return 0;
 222 }
 223 #endif
 224
 225 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 226 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 227 #else
 228 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 229 #endif
 230
 231 #ifndef FS_HAS_FIEMAP
 232 #define FS_HAS_FIEMAP                   (0)
 233 #endif
 234
 235 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 236 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 237 #endif
 238
 239 #ifndef HAVE_D_OBTAIN_ALIAS
 240 /* The old d_alloc_anon() didn't free the inode reference on error
 241  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 242 static inline struct dentry *d_obtain_alias(struct inode *inode)
 243 {
 244         struct dentry *anon = d_alloc_anon(inode);
 245
 246         if (anon == NULL) {
 247                 iput(inode);
 248                 anon = ERR_PTR(-ENOMEM);
 249         }
 250
 251         return anon;
 252 }
 253 #endif
 254
 255 /* add a lustre compatible layer for crypto API */
 256 #include <linux/crypto.h>
 257 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 258 #define ll_crypto_hash          crypto_hash
 259 #define ll_crypto_cipher        crypto_blkcipher
 260 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 261 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 262 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 263 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 264 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 265 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 266                 crypto_blkcipher_setkey(tfm, key, keylen)
 267 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 268                 crypto_blkcipher_set_iv(tfm, src, len)
 269 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 270                 crypto_blkcipher_get_iv(tfm, dst, len)
 271 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 272                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 273 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 274                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 275 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 276                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 277 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 278                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 279
 280 static inline
 281 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 282                                                    u32 type, u32 mask)
 283 {
 284         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 285
 286         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 287 }
 288
 289 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 290                                  u8 *key, unsigned int *keylen,
 291                                  struct scatterlist *sg,
 292                                  unsigned int size, u8 *result)
 293 {
 294         struct hash_desc desc;
 295         int              rv;
 296         desc.tfm   = tfm;
 297         desc.flags = 0;
 298         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 299         if (rv) {
 300                 CERROR("failed to hash setkey: %d\n", rv);
 301                 return rv;
 302         }
 303         return crypto_hash_digest(&desc, sg, size, result);
 304 }
 305 static inline
 306 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 307 {
 308         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 309 }
 310 static inline
 311 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 312 {
 313         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 314 }
 315
 316 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 317 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 318 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 319 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 320 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 321 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 322 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 323 #include <linux/scatterlist.h>
 324 #define ll_crypto_hash          crypto_tfm
 325 #define ll_crypto_cipher        crypto_tfm
 326 #ifndef HAVE_STRUCT_HASH_DESC
 327 struct hash_desc {
 328         struct ll_crypto_hash *tfm;
 329         u32                    flags;
 330 };
 331 #endif
 332 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 333 struct blkcipher_desc {
 334         struct ll_crypto_cipher *tfm;
 335         void                    *info;
 336         u32                      flags;
 337 };
 338 #endif
 339 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 340         crypto_cipher_setkey(tfm, key, keylen)
 341 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 342         crypto_cipher_set_iv(tfm, src, len)
 343 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 344         crypto_cipher_get_iv(tfm, dst, len)
 345 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 346         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 347 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 348         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 349 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 350         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 351 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 352         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 353
 354 static inline
 355 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 356                                                    u32 type, u32 mask)
 357 {
 358         struct ll_crypto_cipher *rtn;
 359         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 360         const char              *pan = algname;
 361         u32                      flag = 0;
 362
 363         if (strncmp("cbc(", algname, 4) == 0)
 364                 flag |= CRYPTO_TFM_MODE_CBC;
 365         else if (strncmp("ecb(", algname, 4) == 0)
 366                 flag |= CRYPTO_TFM_MODE_ECB;
 367         if (flag) {
 368                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 369                 if (vp) {
 370                         memcpy(buf, algname + 4, vp - algname - 4);
 371                         buf[vp - algname - 4] = '\0';
 372                         pan = buf;
 373                 } else {
 374                         flag = 0;
 375                 }
 376         }
 377         rtn = crypto_alloc_tfm(pan, flag);
 378         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 379 }
 380
 381 static inline
 382 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 383 {
 384         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 385         const char *pan = alg;
 386
 387         if (strncmp("hmac(", alg, 5) == 0) {
 388                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 389                 if (vp) {
 390                         memcpy(buf, alg+ 5, vp - alg- 5);
 391                         buf[vp - alg - 5] = 0x00;
 392                         pan = buf;
 393                 }
 394         }
 395         return crypto_alloc_tfm(pan, 0);
 396 }
 397 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 398 {
 399        crypto_digest_init(desc->tfm); return 0;
 400 }
 401 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 402                                         struct scatterlist *sg,
 403                                         unsigned int nbytes)
 404 {
 405         struct scatterlist *sl = sg;
 406         unsigned int        count;
 407                 /*
 408                  * This way is very weakness. We must ensure that
 409                  * the sum of sg[0..i]->length isn't greater than nbytes.
 410                  * In the upstream kernel the crypto_hash_update() also
 411                  * via the nbytes computed the count of sg[...].
 412                  * The old style is more safely. but it gone.
 413                  */
 414         for (count = 0; nbytes > 0; count ++, sl ++) {
 415                 nbytes -= sl->length;
 416         }
 417         crypto_digest_update(desc->tfm, sg, count); return 0;
 418 }
 419 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 420 {
 421         crypto_digest_final(desc->tfm, out); return 0;
 422 }
 423 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 424                                  u8 *key, unsigned int *keylen,
 425                                  struct scatterlist *sg,
 426                                  unsigned int nbytes,
 427                                  u8 *out)
 428 {
 429         struct scatterlist *sl = sg;
 430         int                 count;
 431         for (count = 0; nbytes > 0; count ++, sl ++) {
 432                 nbytes -= sl->length;
 433         }
 434         crypto_hmac(tfm, key, keylen, sg, count, out);
 435         return 0;
 436 }
 437
 438 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 439 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 440 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 441 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 442 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 443 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 444 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 445 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 446 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 447 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 448
 449 #ifdef HAVE_SECURITY_PLUG
 450 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 451 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 452 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 453 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 454 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 455                 vfs_mknod(dir,entry,mnt,mode,dev)
 456 #define ll_security_inode_unlink(dir,entry,mnt)         \
 457                 security_inode_unlink(dir,entry,mnt)
 458 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 459                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 460 #else
 461 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 462 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 463 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 464 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 465 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 466 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 467 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 468                 vfs_rename(old,old_dir,new,new_dir)
 469 #endif /* HAVE_SECURITY_PLUG */
 470
 471 #ifdef for_each_possible_cpu
 472 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 473 #elif defined(for_each_cpu)
 474 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 475 #endif
 476
 477 #ifdef HAVE_BIO_ENDIO_2ARG
 478 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 479 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 480 #else
 481 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 482 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 483 #endif
 484
 485 #ifdef HAVE_FS_STRUCT_USE_PATH
 486 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 487 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 488 #define cfs_path_put(nd)     path_put(&(nd)->path)
 489 #else
 490 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 491 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 492 #define cfs_path_put(nd)     path_release(nd)
 493 #endif
 494
 495 #ifndef HAVE_SIMPLE_SETATTR
 496 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 497 #endif
 498
 499 #ifndef SLAB_DESTROY_BY_RCU
 500 #define SLAB_DESTROY_BY_RCU 0
 501 #endif
 502
 503 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
 504 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 505 #endif
 506
 507 #ifndef HAVE_SB_ANY_QUOTA_LOADED
 508 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 509 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
 510 # else
 511 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
 512 # endif
 513 #endif
 514
 515 static inline int
 516 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 517 {
 518         int rc;
 519
 520         if (sb->s_qcop->quota_on) {
 521 #ifdef HAVE_QUOTA_ON_USE_PATH
 522                 struct path path;
 523
 524                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 525                 if (!rc)
 526                         return rc;
 527 #endif
 528                 rc = sb->s_qcop->quota_on(sb, off, ver
 529 #ifdef HAVE_QUOTA_ON_USE_PATH
 530                                             , &path
 531 #else
 532                                             , name
 533 #endif
 534 #ifdef HAVE_QUOTA_ON_5ARGS
 535                                             , remount
 536 #endif
 537                                            );
 538 #ifdef HAVE_QUOTA_ON_USE_PATH
 539                 path_put(&path);
 540 #endif
 541                 return rc;
 542         }
 543         else
 544                 return -ENOSYS;
 545 }
 546
 547 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 548 {
 549         if (sb->s_qcop->quota_off) {
 550                 return sb->s_qcop->quota_off(sb, off
 551 #ifdef HAVE_QUOTA_OFF_3ARGS
 552                                              , remount
 553 #endif
 554                                             );
 555         }
 556         else
 557                 return -ENOSYS;
 558 }
 559
 560 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 561 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 562 #endif
 563
 564 #ifndef HAVE_VFS_DQ_OFF
 565 # define ll_vfs_dq_init             DQUOT_INIT
 566 # define ll_vfs_dq_drop             DQUOT_DROP
 567 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 568 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 569 #else
 570 # define ll_vfs_dq_init             vfs_dq_init
 571 # define ll_vfs_dq_drop             vfs_dq_drop
 572 # define ll_vfs_dq_transfer         vfs_dq_transfer
 573 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 574 #endif
 575
 576 #ifdef HAVE_BDI_INIT
 577 #define ll_bdi_init(bdi)    bdi_init(bdi)
 578 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 579 #else
 580 #define ll_bdi_init(bdi)    0
 581 #define ll_bdi_destroy(bdi) do { } while(0)
 582 #endif
 583
 584 #ifdef HAVE_NEW_BACKING_DEV_INFO
 585 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 586 #else
 587 # define ll_bdi_wb_cnt(bdi) 1
 588 #endif
 589
 590 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 591 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 592 #endif
 593
 594 #ifndef HAVE_BLKDEV_GET_BY_DEV
 595 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 596 #endif
 597
 598 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 599 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 600 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 601 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 602 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 603 #endif
 604
 605 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 606 #define blk_queue_max_segments(rq, seg)                      \
 607         do { blk_queue_max_phys_segments(rq, seg);           \
 608              blk_queue_max_hw_segments(rq, seg); } while (0)
 609 #else
 610 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 611 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 612 #endif
 613
 614 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
 615 #define ll_kmap_atomic(a, b)    kmap_atomic(a)
 616 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a)
 617 #else
 618 #define ll_kmap_atomic(a, b)    kmap_atomic(a, b)
 619 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a, b)
 620 #endif
 621
 622 #ifndef HAVE_CLEAR_INODE
 623 #define clear_inode(i)          end_writeback(i)
 624 #endif
 625
 626 #ifdef HAVE_DENTRY_D_ALIAS_HLIST
 627 #define ll_d_hlist_node hlist_node
 628 #define ll_d_hlist_empty(list) hlist_empty(list)
 629 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
 630 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
 631 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 632         hlist_for_each_entry(dentry, p, i_dentry, alias)
 633 #else
 634 #define ll_d_hlist_node list_head
 635 #define ll_d_hlist_empty(list) list_empty(list)
 636 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
 637 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
 638 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 639         p = NULL; list_for_each_entry(dentry, i_dentry, alias)
 640 #endif
 641
 642
 643 #ifndef HAVE_BI_HW_SEGMENTS
 644 #define bio_hw_segments(q, bio) 0
 645 #endif
 646
 647 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 648 #define pagevec_lru_add_file pagevec_lru_add
 649 #endif
 650
 651 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 652 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 653         add_to_page_cache_lru(pg, mapping, off, gfp)
 654 #define ll_pagevec_init(pv, cold)       do {} while (0)
 655 #define ll_pagevec_add(pv, pg)          (0)
 656 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 657 #else
 658 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 659         add_to_page_cache(pg, mapping, off, gfp)
 660 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 661 #define ll_pagevec_add(pv, pg)                                  \
 662 ({                                                              \
 663         int __ret;                                              \
 664                                                                 \
 665         page_cache_get(pg);                                     \
 666         __ret = pagevec_add(pv, pg);                            \
 667 })
 668 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 669 #endif
 670
 671 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 672 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 673 #define HAVE_NODE_TO_CPUMASK
 674 #endif
 675
 676 #ifndef QUOTA_OK
 677 # define QUOTA_OK 0
 678 #endif
 679 #ifndef NO_QUOTA
 680 # define NO_QUOTA (-EDQUOT)
 681 #endif
 682
 683 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 684 # define ext2_set_bit             __test_and_set_bit_le
 685 # define ext2_clear_bit           __test_and_clear_bit_le
 686 # define ext2_test_bit            test_bit_le
 687 # define ext2_find_first_zero_bit find_first_zero_bit_le
 688 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 689 #endif
 690
 691 #ifdef ATTR_TIMES_SET
 692 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 693 #else
 694 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 695 #endif
 696
 697 #ifndef HAVE_SELINUX_IS_ENABLED
 698 static inline bool selinux_is_enabled(void)
 699 {
 700         return 0;
 701 }
 702 #endif
 703
 704 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 705 # define lm_compare_owner       fl_compare_owner
 706 #endif
 707
 708 /*
 709  * After 3.1, kernel's nameidata.intent.open.flags is different
 710  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
 711  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
 712  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
 713  * */
 714 #include <linux/version.h>
 715 static inline int ll_namei_to_lookup_intent_flag(int flag)
 716 {
 717 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
 718         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
 719 #endif
 720         return flag;
 721 }
 722
 723 #ifdef HAVE_VOID_MAKE_REQUEST_FN
 724 # define ll_mrf_ret void
 725 # define LL_MRF_RETURN(rc)
 726 #else
 727 # define ll_mrf_ret int
 728 # define LL_MRF_RETURN(rc) RETURN(rc)
 729 #endif
 730
 731 #include <linux/fs.h>
 732 #ifndef HAVE_PROTECT_I_NLINK
 733 static inline void set_nlink(struct inode *inode, unsigned int nlink)
 734 {
 735         inode->i_nlink = nlink;
 736 }
 737 #endif
 738
 739 #ifdef HAVE_INODEOPS_USE_UMODE_T
 740 # define ll_umode_t     umode_t
 741 #else
 742 # define ll_umode_t     int
 743 #endif
 744
 745 #include <linux/dcache.h>
 746 #ifndef HAVE_D_MAKE_ROOT
 747 static inline struct dentry *d_make_root(struct inode *root)
 748 {
 749         struct dentry *res = d_alloc_root(root);
 750
 751         if (res == NULL && root)
 752                 iput(root);
 753
 754         return res;
 755 }
 756 #endif
 757
 758 #endif /* _COMPAT25_H */