1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #ifndef _LINUX_COMPAT25_H
24 #define _LINUX_COMPAT25_H
28 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,5)
29 #error Sorry, Lustre requires at Linux kernel version 2.6.5 or later
32 #include <libcfs/linux/portals_compat25.h>
34 #include <linux/lustre_patchless_compat.h>
36 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
39 unsigned int ia_attr_flags;
42 #define ll_iattr iattr
43 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
45 #ifndef HAVE_SET_FS_PWD
46 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
47 struct dentry *dentry)
49 struct dentry *old_pwd;
50 struct vfsmount *old_pwdmnt;
52 write_lock(&fs->lock);
54 old_pwdmnt = fs->pwdmnt;
55 fs->pwdmnt = mntget(mnt);
56 fs->pwd = dget(dentry);
57 write_unlock(&fs->lock);
65 #define ll_set_fs_pwd set_fs_pwd
66 #endif /* HAVE_SET_FS_PWD */
69 * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
70 * ATTR_* attributes (see bug 13828)
72 #define ATTR_BLOCKS (1 << 27)
74 #if HAVE_INODE_I_MUTEX
75 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
76 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
77 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
79 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
80 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
81 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
82 #endif /* HAVE_INODE_I_MUTEX */
84 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
85 #define d_child d_u.d_child
86 #define d_rcu d_u.d_rcu
89 #ifdef HAVE_DQUOTOFF_MUTEX
90 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
91 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
93 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
94 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
95 #endif /* HAVE_DQUOTOFF_MUTEX */
97 #define current_ngroups current->group_info->ngroups
98 #define current_groups current->group_info->small_block
101 #define page_private(page) ((page)->private)
102 #define set_page_private(page, v) ((page)->private = (v))
109 #define lock_dentry(___dentry) spin_lock(&(___dentry)->d_lock)
110 #define unlock_dentry(___dentry) spin_unlock(&(___dentry)->d_lock)
112 #define ll_kernel_locked() kernel_locked()
115 * OBD need working random driver, thus all our
116 * initialization routines must be called after device
117 * driver initialization
121 #define module_init(a) late_initcall(a)
124 /* XXX our code should be using the 2.6 calls, not the other way around */
125 #define TryLockPage(page) TestSetPageLocked(page)
126 #define Page_Uptodate(page) PageUptodate(page)
127 #define ll_redirty_page(page) set_page_dirty(page)
129 #define KDEVT_INIT(val) (val)
131 #define LTIME_S(time) (time.tv_sec)
132 #define ll_path_lookup path_lookup
133 #define ll_permission(inode,mask,nd) permission(inode,mask,nd)
135 #define ll_pgcache_lock(mapping) spin_lock(&mapping->page_lock)
136 #define ll_pgcache_unlock(mapping) spin_unlock(&mapping->page_lock)
137 #define ll_call_writepage(inode, page) \
138 (inode)->i_mapping->a_ops->writepage(page, NULL)
139 #define ll_invalidate_inode_pages(inode) \
140 invalidate_inode_pages((inode)->i_mapping)
141 #define ll_truncate_complete_page(page) \
142 truncate_complete_page(page->mapping, page)
144 #define ll_vfs_create(a,b,c,d) vfs_create(a,b,c,d)
145 #define ll_dev_t dev_t
147 #define to_kdev_t(dev) (dev)
148 #define kdev_t_to_nr(dev) (dev)
149 #define val_to_kdev(dev) (dev)
150 #define ILOOKUP(sb, ino, test, data) ilookup5(sb, ino, test, data);
152 #include <linux/writeback.h>
154 static inline int cleanup_group_info(void)
156 struct group_info *ginfo;
158 ginfo = groups_alloc(0);
162 set_current_groups(ginfo);
163 put_group_info(ginfo);
168 #define __set_page_ll_data(page, llap) \
170 page_cache_get(page); \
171 SetPagePrivate(page); \
172 set_page_private(page, (unsigned long)llap); \
174 #define __clear_page_ll_data(page) \
176 ClearPagePrivate(page); \
177 set_page_private(page, 0); \
178 page_cache_release(page); \
183 #include <linux/proc_fs.h>
185 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
186 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
187 extern void __d_rehash(struct dentry *dentry, int lock);
190 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
191 #define d_move_locked(dentry, target) __d_move(dentry, target)
192 extern void __d_move(struct dentry *dentry, struct dentry *target);
195 #ifdef HAVE_CAN_SLEEP_ARG
196 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
197 flock_lock_file_wait(file, lock, can_sleep)
199 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
200 flock_lock_file_wait(file, lock)
203 #define CheckWriteback(page, cmd) \
204 (!(!PageWriteback(page) && cmd == OBD_BRW_WRITE))
206 #ifdef HAVE_PAGE_LIST
207 static inline int mapping_has_pages(struct address_space *mapping)
211 ll_pgcache_lock(mapping);
212 if (list_empty(&mapping->dirty_pages) &&
213 list_empty(&mapping->clean_pages) &&
214 list_empty(&mapping->locked_pages)) {
217 ll_pgcache_unlock(mapping);
222 static inline int mapping_has_pages(struct address_space *mapping)
224 return mapping->nrpages > 0;
228 #ifdef HAVE_KIOBUF_KIO_BLOCKS
229 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
231 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
234 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
235 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
236 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
238 #define ll_set_dflags(dentry, flags) do { \
239 spin_lock(&dentry->d_lock); \
240 dentry->d_flags |= flags; \
241 spin_unlock(&dentry->d_lock); \
243 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path, mode)
247 #define container_of(ptr, type, member) ({ \
248 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
249 (type *)( (char *)__mptr - offsetof(type,member) );})
252 #ifdef HAVE_I_ALLOC_SEM
253 #define UP_WRITE_I_ALLOC_SEM(i) do { up_write(&(i)->i_alloc_sem); } while (0)
254 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
255 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
257 #define UP_READ_I_ALLOC_SEM(i) do { up_read(&(i)->i_alloc_sem); } while (0)
258 #define DOWN_READ_I_ALLOC_SEM(i) do { down_read(&(i)->i_alloc_sem); } while (0)
259 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
261 #define UP_READ_I_ALLOC_SEM(i) do { } while (0)
262 #define DOWN_READ_I_ALLOC_SEM(i) do { } while (0)
263 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) do { } while (0)
265 #define UP_WRITE_I_ALLOC_SEM(i) do { } while (0)
266 #define DOWN_WRITE_I_ALLOC_SEM(i) do { } while (0)
267 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
270 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
271 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
274 #ifndef HAVE_FILEMAP_FDATAWRITE
275 #define filemap_fdatawrite(mapping) filemap_fdatasync(mapping)
278 #ifdef HAVE_VFS_KERN_MOUNT
281 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
283 struct file_system_type *type = get_fs_type(fstype);
284 struct vfsmount *mnt;
286 return ERR_PTR(-ENODEV);
287 mnt = vfs_kern_mount(type, flags, name, data);
288 module_put(type->owner);
292 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
295 #ifndef HAVE_GENERIC_FILE_READ
298 generic_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
300 struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
304 init_sync_kiocb(&kiocb, filp);
305 kiocb.ki_pos = *ppos;
308 ret = generic_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
309 *ppos = kiocb.ki_pos;
314 #ifndef HAVE_GENERIC_FILE_WRITE
317 generic_file_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
319 struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
323 init_sync_kiocb(&kiocb, filp);
324 kiocb.ki_pos = *ppos;
327 ret = generic_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
328 *ppos = kiocb.ki_pos;
334 #ifdef HAVE_STATFS_DENTRY_PARAM
335 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
337 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
341 #ifndef HAVE_TASK_PPTR
342 #define p_pptr parent
345 #ifndef HAVE_SB_TIME_GRAN
346 #ifndef HAVE_S_TIME_GRAN
347 #error Need s_time_gran patch!
349 static inline u32 get_sb_time_gran(struct super_block *sb)
351 return sb->s_time_gran;
355 #ifdef HAVE_RW_TREE_LOCK
356 #define TREE_READ_LOCK_IRQ(mapping) read_lock_irq(&(mapping)->tree_lock)
357 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
359 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
360 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
363 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
364 #define ll_unregister_blkdev(a,b) unregister_blkdev((a),(b))
367 int ll_unregister_blkdev(unsigned int dev, const char *name)
369 unregister_blkdev(dev, name);
374 #ifdef HAVE_INVALIDATE_BDEV_2ARG
375 #define ll_invalidate_bdev(a,b) invalidate_bdev((a),(b))
377 #define ll_invalidate_bdev(a,b) invalidate_bdev((a))
380 #ifdef HAVE_INODE_BLKSIZE
381 #define ll_inode_blksize(a) (a)->i_blksize
383 #define ll_inode_blksize(a) (1<<(a)->i_blkbits)
386 #ifndef HAVE_EXPORT_NR_FREE_BUFFER_PAGES
387 static inline unsigned int ll_nr_free_buffer_pages(void)
392 return (unsigned int)(si.freeram - si.freehigh);
395 #define ll_nr_free_buffer_pages() nr_free_buffer_pages()
399 #define FS_RENAME_DOES_D_MOVE FS_ODD_RENAME
402 /* add a lustre compatible layer for crypto API */
403 #include <linux/crypto.h>
404 #ifdef HAVE_ASYNC_BLOCK_CIPHER
405 #define ll_crypto_hash crypto_hash
406 #define ll_crypto_cipher crypto_blkcipher
407 #define ll_crypto_alloc_hash(name, type, mask) crypto_alloc_hash(name, type, mask)
408 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
409 #define ll_crypto_hash_init(desc) crypto_hash_init(desc)
410 #define ll_crypto_hash_update(desc, sl, bytes) crypto_hash_update(desc, sl, bytes)
411 #define ll_crypto_hash_final(desc, out) crypto_hash_final(desc, out)
412 #define ll_crypto_alloc_blkcipher(name, type, mask) \
413 crypto_alloc_blkcipher(name ,type, mask)
414 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
415 crypto_blkcipher_setkey(tfm, key, keylen)
416 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
417 crypto_blkcipher_set_iv(tfm, src, len)
418 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
419 crypto_blkcipher_get_iv(tfm, dst, len)
420 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
421 crypto_blkcipher_encrypt(desc, dst, src, bytes)
422 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
423 crypto_blkcipher_decrypt(desc, dst, src, bytes)
424 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
425 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
426 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
427 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
429 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
430 u8 *key, unsigned int *keylen,
431 struct scatterlist *sg,
432 unsigned int size, u8 *result)
434 struct hash_desc desc;
438 rv = crypto_hash_setkey(desc.tfm, key, *keylen);
440 CERROR("failed to hash setkey: %d\n", rv);
443 return crypto_hash_digest(&desc, sg, size, result);
446 unsigned int crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
448 return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
451 unsigned int crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
453 return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
456 #define ll_crypto_hash_blocksize(tfm) crypto_hash_blocksize(tfm)
457 #define ll_crypto_hash_digestsize(tfm) crypto_hash_digestsize(tfm)
458 #define ll_crypto_blkcipher_ivsize(tfm) crypto_blkcipher_ivsize(tfm)
459 #define ll_crypto_blkcipher_blocksize(tfm) crypto_blkcipher_blocksize(tfm)
460 #define ll_crypto_free_hash(tfm) crypto_free_hash(tfm)
461 #define ll_crypto_free_blkcipher(tfm) crypto_free_blkcipher(tfm)
462 #else /* HAVE_ASYNC_BLOCK_CIPHER */
463 #include <linux/scatterlist.h>
464 #define ll_crypto_hash crypto_tfm
465 #define ll_crypto_cipher crypto_tfm
467 struct ll_crypto_hash *tfm;
470 struct blkcipher_desc {
471 struct ll_crypto_cipher *tfm;
475 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
476 crypto_cipher_setkey(tfm, key, keylen)
477 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
478 crypto_cipher_set_iv(tfm, src, len)
479 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
480 crypto_cipher_get_iv(tfm, dst, len)
481 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
482 crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
483 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
484 crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
485 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
486 crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
487 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
488 crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
490 extern struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(
491 const char * algname, u32 type, u32 mask);
493 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
495 char buf[CRYPTO_MAX_ALG_NAME + 1];
496 const char *pan = alg;
498 if (strncmp("hmac(", alg, 5) == 0) {
499 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
501 memcpy(buf, alg+ 5, vp - alg- 5);
502 buf[vp - alg - 5] = 0x00;
506 return crypto_alloc_tfm(pan, 0);
508 static inline int ll_crypto_hash_init(struct hash_desc *desc)
510 crypto_digest_init(desc->tfm); return 0;
512 static inline int ll_crypto_hash_update(struct hash_desc *desc,
513 struct scatterlist *sg,
516 struct scatterlist *sl = sg;
519 * This way is very weakness. We must ensure that
520 * the sum of sg[0..i]->length isn't greater than nbytes.
521 * In the upstream kernel the crypto_hash_update() also
522 * via the nbytes computed the count of sg[...].
523 * The old style is more safely. but it gone.
525 for (count = 0; nbytes > 0; count ++, sl ++) {
526 nbytes -= sl->length;
528 crypto_digest_update(desc->tfm, sg, count); return 0;
530 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
532 crypto_digest_final(desc->tfm, out); return 0;
534 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
535 u8 *key, unsigned int *keylen,
536 struct scatterlist *sg,
540 struct scatterlist *sl = sg;
542 for (count = 0; nbytes > 0; count ++, sl ++) {
543 nbytes -= sl->length;
545 crypto_hmac(tfm, key, keylen, sg, count, out);
549 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
550 #define ll_crypto_blkcipher_blocksize(tfm) crypto_tfm_alg_blocksize(tfm)
551 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
552 #define ll_crypto_hash_digestsize(tfm) crypto_tfm_alg_digestsize(tfm)
553 #define ll_crypto_hash_blocksize(tfm) crypto_tfm_alg_blocksize(tfm)
554 #define ll_crypto_free_hash(tfm) crypto_free_tfm(tfm)
555 #define ll_crypto_free_blkcipher(tfm) crypto_free_tfm(tfm)
556 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
558 #endif /* __KERNEL__ */
559 #endif /* _COMPAT25_H */