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 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_HIDE_VFSMOUNT_GUTS
 184 # include <../fs/mount.h>
 185 #else
 186 # define real_mount(mnt)        (mnt)
 187 #endif
 188
 189 static inline const char *mnt_get_devname(struct vfsmount *mnt)
 190 {
 191         return real_mount(mnt)->mnt_devname;
 192 }
 193
 194 #ifndef HAVE_ATOMIC_MNT_COUNT
 195 static inline unsigned int mnt_get_count(struct vfsmount *mnt)
 196 {
 197 #ifdef CONFIG_SMP
 198         unsigned int count = 0;
 199         int cpu;
 200
 201         for_each_possible_cpu(cpu) {
 202                 count += per_cpu_ptr(real_mount(mnt)->mnt_pcp, cpu)->mnt_count;
 203         }
 204
 205         return count;
 206 #else
 207         return real_mount(mnt)->mnt_count;
 208 #endif
 209 }
 210 #else
 211 # define mnt_get_count(mnt)      cfs_atomic_read(&(real_mount(mnt)->mnt_count))
 212 #endif
 213
 214 #ifdef HAVE_RW_TREE_LOCK
 215 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 216 #define TREE_READ_UNLOCK_IRQ(mapping)   read_unlock_irq(&(mapping)->tree_lock)
 217 #else
 218 #define TREE_READ_LOCK_IRQ(mapping)     spin_lock_irq(&(mapping)->tree_lock)
 219 #define TREE_READ_UNLOCK_IRQ(mapping)   spin_unlock_irq(&(mapping)->tree_lock)
 220 #endif
 221
 222 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 223 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 224 #else
 225 static inline
 226 int ll_unregister_blkdev(unsigned int dev, const char *name)
 227 {
 228         unregister_blkdev(dev, name);
 229         return 0;
 230 }
 231 #endif
 232
 233 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 234 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 235 #else
 236 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 237 #endif
 238
 239 #ifndef FS_HAS_FIEMAP
 240 #define FS_HAS_FIEMAP                   (0)
 241 #endif
 242
 243 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 244 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 245 #endif
 246
 247 #ifndef HAVE_D_OBTAIN_ALIAS
 248 /* The old d_alloc_anon() didn't free the inode reference on error
 249  * like d_obtain_alias().  Hide that difference/inconvenience here. */
 250 static inline struct dentry *d_obtain_alias(struct inode *inode)
 251 {
 252         struct dentry *anon = d_alloc_anon(inode);
 253
 254         if (anon == NULL) {
 255                 iput(inode);
 256                 anon = ERR_PTR(-ENOMEM);
 257         }
 258
 259         return anon;
 260 }
 261 #endif
 262
 263 /* add a lustre compatible layer for crypto API */
 264 #include <linux/crypto.h>
 265 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 266 #define ll_crypto_hash          crypto_hash
 267 #define ll_crypto_cipher        crypto_blkcipher
 268 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 269 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 270 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 271 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 272 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 273 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 274                 crypto_blkcipher_setkey(tfm, key, keylen)
 275 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 276                 crypto_blkcipher_set_iv(tfm, src, len)
 277 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 278                 crypto_blkcipher_get_iv(tfm, dst, len)
 279 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 280                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 281 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 282                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 283 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 284                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 285 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 286                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 287
 288 static inline
 289 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 290                                                    u32 type, u32 mask)
 291 {
 292         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 293
 294         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 295 }
 296
 297 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 298                                  u8 *key, unsigned int *keylen,
 299                                  struct scatterlist *sg,
 300                                  unsigned int size, u8 *result)
 301 {
 302         struct hash_desc desc;
 303         int              rv;
 304         desc.tfm   = tfm;
 305         desc.flags = 0;
 306         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 307         if (rv) {
 308                 CERROR("failed to hash setkey: %d\n", rv);
 309                 return rv;
 310         }
 311         return crypto_hash_digest(&desc, sg, size, result);
 312 }
 313 static inline
 314 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 315 {
 316         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 317 }
 318 static inline
 319 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 320 {
 321         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 322 }
 323
 324 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 325 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 326 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 327 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 328 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 329 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 330 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 331 #include <linux/scatterlist.h>
 332 #define ll_crypto_hash          crypto_tfm
 333 #define ll_crypto_cipher        crypto_tfm
 334 #ifndef HAVE_STRUCT_HASH_DESC
 335 struct hash_desc {
 336         struct ll_crypto_hash *tfm;
 337         u32                    flags;
 338 };
 339 #endif
 340 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 341 struct blkcipher_desc {
 342         struct ll_crypto_cipher *tfm;
 343         void                    *info;
 344         u32                      flags;
 345 };
 346 #endif
 347 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 348         crypto_cipher_setkey(tfm, key, keylen)
 349 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 350         crypto_cipher_set_iv(tfm, src, len)
 351 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 352         crypto_cipher_get_iv(tfm, dst, len)
 353 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 354         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 355 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 356         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 357 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 358         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 359 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 360         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 361
 362 static inline
 363 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 364                                                    u32 type, u32 mask)
 365 {
 366         struct ll_crypto_cipher *rtn;
 367         char                     buf[CRYPTO_MAX_ALG_NAME + 1];
 368         const char              *pan = algname;
 369         u32                      flag = 0;
 370
 371         if (strncmp("cbc(", algname, 4) == 0)
 372                 flag |= CRYPTO_TFM_MODE_CBC;
 373         else if (strncmp("ecb(", algname, 4) == 0)
 374                 flag |= CRYPTO_TFM_MODE_ECB;
 375         if (flag) {
 376                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 377                 if (vp) {
 378                         memcpy(buf, algname + 4, vp - algname - 4);
 379                         buf[vp - algname - 4] = '\0';
 380                         pan = buf;
 381                 } else {
 382                         flag = 0;
 383                 }
 384         }
 385         rtn = crypto_alloc_tfm(pan, flag);
 386         return (rtn == NULL ?  ERR_PTR(-ENOMEM) : rtn);
 387 }
 388
 389 static inline
 390 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 391 {
 392         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 393         const char *pan = alg;
 394
 395         if (strncmp("hmac(", alg, 5) == 0) {
 396                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 397                 if (vp) {
 398                         memcpy(buf, alg+ 5, vp - alg- 5);
 399                         buf[vp - alg - 5] = 0x00;
 400                         pan = buf;
 401                 }
 402         }
 403         return crypto_alloc_tfm(pan, 0);
 404 }
 405 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 406 {
 407        crypto_digest_init(desc->tfm); return 0;
 408 }
 409 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 410                                         struct scatterlist *sg,
 411                                         unsigned int nbytes)
 412 {
 413         struct scatterlist *sl = sg;
 414         unsigned int        count;
 415                 /*
 416                  * This way is very weakness. We must ensure that
 417                  * the sum of sg[0..i]->length isn't greater than nbytes.
 418                  * In the upstream kernel the crypto_hash_update() also
 419                  * via the nbytes computed the count of sg[...].
 420                  * The old style is more safely. but it gone.
 421                  */
 422         for (count = 0; nbytes > 0; count ++, sl ++) {
 423                 nbytes -= sl->length;
 424         }
 425         crypto_digest_update(desc->tfm, sg, count); return 0;
 426 }
 427 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 428 {
 429         crypto_digest_final(desc->tfm, out); return 0;
 430 }
 431 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 432                                  u8 *key, unsigned int *keylen,
 433                                  struct scatterlist *sg,
 434                                  unsigned int nbytes,
 435                                  u8 *out)
 436 {
 437         struct scatterlist *sl = sg;
 438         int                 count;
 439         for (count = 0; nbytes > 0; count ++, sl ++) {
 440                 nbytes -= sl->length;
 441         }
 442         crypto_hmac(tfm, key, keylen, sg, count, out);
 443         return 0;
 444 }
 445
 446 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 447 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 448 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 449 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 450 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 451 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 452 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 453 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 454 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 455 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 456
 457 #ifdef HAVE_SECURITY_PLUG
 458 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 459 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 460 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 461 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 462 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 463                 vfs_mknod(dir,entry,mnt,mode,dev)
 464 #define ll_security_inode_unlink(dir,entry,mnt)         \
 465                 security_inode_unlink(dir,entry,mnt)
 466 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 467                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 468 #else
 469 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 470 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 471 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 472 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 473 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 474 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 475 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 476                 vfs_rename(old,old_dir,new,new_dir)
 477 #endif /* HAVE_SECURITY_PLUG */
 478
 479 #ifdef for_each_possible_cpu
 480 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 481 #elif defined(for_each_cpu)
 482 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 483 #endif
 484
 485 #ifdef HAVE_BIO_ENDIO_2ARG
 486 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 487 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 488 #else
 489 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 490 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 491 #endif
 492
 493 #ifdef HAVE_FS_STRUCT_USE_PATH
 494 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 495 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 496 #define cfs_path_put(nd)     path_put(&(nd)->path)
 497 #else
 498 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 499 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 500 #define cfs_path_put(nd)     path_release(nd)
 501 #endif
 502
 503 #ifndef HAVE_SIMPLE_SETATTR
 504 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 505 #endif
 506
 507 #ifndef SLAB_DESTROY_BY_RCU
 508 #define SLAB_DESTROY_BY_RCU 0
 509 #endif
 510
 511 #ifndef HAVE_SB_HAS_QUOTA_ACTIVE
 512 #define sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 513 #endif
 514
 515 #ifndef HAVE_SB_ANY_QUOTA_LOADED
 516 # ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 517 # define sb_any_quota_loaded(sb) sb_any_quota_active(sb)
 518 # else
 519 # define sb_any_quota_loaded(sb) sb_any_quota_enabled(sb)
 520 # endif
 521 #endif
 522
 523 static inline int
 524 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 525 {
 526         int rc;
 527
 528         if (sb->s_qcop->quota_on) {
 529 #ifdef HAVE_QUOTA_ON_USE_PATH
 530                 struct path path;
 531
 532                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 533                 if (!rc)
 534                         return rc;
 535 #endif
 536                 rc = sb->s_qcop->quota_on(sb, off, ver
 537 #ifdef HAVE_QUOTA_ON_USE_PATH
 538                                             , &path
 539 #else
 540                                             , name
 541 #endif
 542 #ifdef HAVE_QUOTA_ON_5ARGS
 543                                             , remount
 544 #endif
 545                                            );
 546 #ifdef HAVE_QUOTA_ON_USE_PATH
 547                 path_put(&path);
 548 #endif
 549                 return rc;
 550         }
 551         else
 552                 return -ENOSYS;
 553 }
 554
 555 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 556 {
 557         if (sb->s_qcop->quota_off) {
 558                 return sb->s_qcop->quota_off(sb, off
 559 #ifdef HAVE_QUOTA_OFF_3ARGS
 560                                              , remount
 561 #endif
 562                                             );
 563         }
 564         else
 565                 return -ENOSYS;
 566 }
 567
 568 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 569 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 570 #endif
 571
 572 #ifndef HAVE_VFS_DQ_OFF
 573 # define ll_vfs_dq_init             DQUOT_INIT
 574 # define ll_vfs_dq_drop             DQUOT_DROP
 575 # define ll_vfs_dq_transfer         DQUOT_TRANSFER
 576 # define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
 577 #else
 578 # define ll_vfs_dq_init             vfs_dq_init
 579 # define ll_vfs_dq_drop             vfs_dq_drop
 580 # define ll_vfs_dq_transfer         vfs_dq_transfer
 581 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 582 #endif
 583
 584 #ifdef HAVE_BDI_INIT
 585 #define ll_bdi_init(bdi)    bdi_init(bdi)
 586 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 587 #else
 588 #define ll_bdi_init(bdi)    0
 589 #define ll_bdi_destroy(bdi) do { } while(0)
 590 #endif
 591
 592 #ifdef HAVE_NEW_BACKING_DEV_INFO
 593 # define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 594 #else
 595 # define ll_bdi_wb_cnt(bdi) 1
 596 #endif
 597
 598 #ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
 599 #define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
 600 #endif
 601
 602 #ifndef HAVE_BLKDEV_GET_BY_DEV
 603 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 604 #endif
 605
 606 #ifndef HAVE_REQUEST_QUEUE_LIMITS
 607 #define queue_max_sectors(rq)             ((rq)->max_sectors)
 608 #define queue_max_hw_sectors(rq)          ((rq)->max_hw_sectors)
 609 #define queue_max_phys_segments(rq)       ((rq)->max_phys_segments)
 610 #define queue_max_hw_segments(rq)         ((rq)->max_hw_segments)
 611 #endif
 612
 613 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 614 #define blk_queue_max_segments(rq, seg)                      \
 615         do { blk_queue_max_phys_segments(rq, seg);           \
 616              blk_queue_max_hw_segments(rq, seg); } while (0)
 617 #else
 618 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 619 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 620 #endif
 621
 622 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
 623 #define ll_kmap_atomic(a, b)    kmap_atomic(a)
 624 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a)
 625 #else
 626 #define ll_kmap_atomic(a, b)    kmap_atomic(a, b)
 627 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a, b)
 628 #endif
 629
 630 #ifndef HAVE_CLEAR_INODE
 631 #define clear_inode(i)          end_writeback(i)
 632 #endif
 633
 634 #ifdef HAVE_DENTRY_D_ALIAS_HLIST
 635 #define ll_d_hlist_node hlist_node
 636 #define ll_d_hlist_empty(list) hlist_empty(list)
 637 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
 638 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
 639 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 640         hlist_for_each_entry(dentry, p, i_dentry, alias)
 641 #else
 642 #define ll_d_hlist_node list_head
 643 #define ll_d_hlist_empty(list) list_empty(list)
 644 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
 645 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
 646 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 647         p = NULL; list_for_each_entry(dentry, i_dentry, alias)
 648 #endif
 649
 650
 651 #ifndef HAVE_BI_HW_SEGMENTS
 652 #define bio_hw_segments(q, bio) 0
 653 #endif
 654
 655 #ifndef HAVE_PAGEVEC_LRU_ADD_FILE
 656 #define pagevec_lru_add_file pagevec_lru_add
 657 #endif
 658
 659 #ifdef HAVE_ADD_TO_PAGE_CACHE_LRU
 660 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 661         add_to_page_cache_lru(pg, mapping, off, gfp)
 662 #define ll_pagevec_init(pv, cold)       do {} while (0)
 663 #define ll_pagevec_add(pv, pg)          (0)
 664 #define ll_pagevec_lru_add_file(pv)     do {} while (0)
 665 #else
 666 #define ll_add_to_page_cache_lru(pg, mapping, off, gfp) \
 667         add_to_page_cache(pg, mapping, off, gfp)
 668 #define ll_pagevec_init(pv, cold)       pagevec_init(&lru_pvec, cold);
 669 #define ll_pagevec_add(pv, pg)                                  \
 670 ({                                                              \
 671         int __ret;                                              \
 672                                                                 \
 673         page_cache_get(pg);                                     \
 674         __ret = pagevec_add(pv, pg);                            \
 675 })
 676 #define ll_pagevec_lru_add_file(pv)     pagevec_lru_add_file(pv)
 677 #endif
 678
 679 #if !defined(HAVE_NODE_TO_CPUMASK) && defined(HAVE_CPUMASK_OF_NODE)
 680 #define node_to_cpumask(i)         (*(cpumask_of_node(i)))
 681 #define HAVE_NODE_TO_CPUMASK
 682 #endif
 683
 684 #ifndef QUOTA_OK
 685 # define QUOTA_OK 0
 686 #endif
 687 #ifndef NO_QUOTA
 688 # define NO_QUOTA (-EDQUOT)
 689 #endif
 690
 691 #ifndef SEEK_DATA
 692 #define SEEK_DATA      3       /* seek to the next data */
 693 #endif
 694 #ifndef SEEK_HOLE
 695 #define SEEK_HOLE      4       /* seek to the next hole */
 696 #endif
 697
 698 #ifndef FMODE_UNSIGNED_OFFSET
 699 #define FMODE_UNSIGNED_OFFSET   ((__force fmode_t)0x2000)
 700 #endif
 701
 702 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 703 # define ext2_set_bit             __test_and_set_bit_le
 704 # define ext2_clear_bit           __test_and_clear_bit_le
 705 # define ext2_test_bit            test_bit_le
 706 # define ext2_find_first_zero_bit find_first_zero_bit_le
 707 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 708 #endif
 709
 710 #ifdef ATTR_TIMES_SET
 711 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 712 #else
 713 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 714 #endif
 715
 716 #ifndef HAVE_SELINUX_IS_ENABLED
 717 static inline bool selinux_is_enabled(void)
 718 {
 719         return 0;
 720 }
 721 #endif
 722
 723 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 724 # define lm_compare_owner       fl_compare_owner
 725 #endif
 726
 727 /*
 728  * After 3.1, kernel's nameidata.intent.open.flags is different
 729  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
 730  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
 731  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
 732  * */
 733 #include <linux/version.h>
 734 static inline int ll_namei_to_lookup_intent_flag(int flag)
 735 {
 736 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
 737         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
 738 #endif
 739         return flag;
 740 }
 741
 742 #ifdef HAVE_VOID_MAKE_REQUEST_FN
 743 # define ll_mrf_ret void
 744 # define LL_MRF_RETURN(rc)
 745 #else
 746 # define ll_mrf_ret int
 747 # define LL_MRF_RETURN(rc) RETURN(rc)
 748 #endif
 749
 750 #include <linux/fs.h>
 751 #ifndef HAVE_PROTECT_I_NLINK
 752 static inline void set_nlink(struct inode *inode, unsigned int nlink)
 753 {
 754         inode->i_nlink = nlink;
 755 }
 756 #endif
 757
 758 #ifdef HAVE_INODEOPS_USE_UMODE_T
 759 # define ll_umode_t     umode_t
 760 #else
 761 # define ll_umode_t     int
 762 #endif
 763
 764 #include <linux/dcache.h>
 765 #ifndef HAVE_D_MAKE_ROOT
 766 static inline struct dentry *d_make_root(struct inode *root)
 767 {
 768         struct dentry *res = d_alloc_root(root);
 769
 770         if (res == NULL && root)
 771                 iput(root);
 772
 773         return res;
 774 }
 775 #endif
 776
 777 #endif /* _COMPAT25_H */