4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef _LUSTRE_COMPAT_H
38 #define _LUSTRE_COMPAT_H
40 #include <linux/fs_struct.h>
41 #include <linux/namei.h>
42 #include <linux/pagemap.h>
43 #include <linux/bio.h>
45 #include <libcfs/libcfs.h>
46 #include <lustre_patchless_compat.h>
48 #ifdef HAVE_FS_STRUCT_RWLOCK
49 # define LOCK_FS_STRUCT(fs) write_lock(&(fs)->lock)
50 # define UNLOCK_FS_STRUCT(fs) write_unlock(&(fs)->lock)
52 # define LOCK_FS_STRUCT(fs) spin_lock(&(fs)->lock)
53 # define UNLOCK_FS_STRUCT(fs) spin_unlock(&(fs)->lock)
56 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
57 struct dentry *dentry)
75 * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
76 * ATTR_* attributes (see bug 13828)
78 #define ATTR_BLOCKS (1 << 27)
80 #define current_ngroups current_cred()->group_info->ngroups
81 #define current_groups current_cred()->group_info->small_block
84 * OBD need working random driver, thus all our
85 * initialization routines must be called after device
86 * driver initialization
90 #define module_init(a) late_initcall(a)
93 #ifndef MODULE_ALIAS_FS
94 #define MODULE_ALIAS_FS(name)
97 #define LTIME_S(time) (time.tv_sec)
99 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
100 # define ll_generic_permission(inode, mask, flags, check_acl) \
101 generic_permission(inode, mask)
102 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
103 # define ll_generic_permission(inode, mask, flags, check_acl) \
104 generic_permission(inode, mask, flags, check_acl)
106 # define ll_generic_permission(inode, mask, flags, check_acl) \
107 generic_permission(inode, mask, check_acl)
110 #ifdef HAVE_4ARGS_VFS_SYMLINK
111 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
112 vfs_symlink(dir, dentry, path, mode)
114 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
115 vfs_symlink(dir, dentry, path)
118 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_SIZE_5ARGS)
119 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
120 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
122 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
123 generic_file_llseek_size(file, offset, origin, maxbytes);
126 #ifdef HAVE_INODE_DIO_WAIT
127 /* inode_dio_wait(i) use as-is for write lock */
128 # define inode_dio_write_done(i) do {} while (0) /* for write unlock */
130 # define inode_dio_wait(i) down_write(&(i)->i_alloc_sem)
131 # define inode_dio_write_done(i) up_write(&(i)->i_alloc_sem)
134 #ifndef FS_HAS_FIEMAP
135 #define FS_HAS_FIEMAP (0)
138 /* add a lustre compatible layer for crypto API */
139 #include <linux/crypto.h>
140 static inline int ll_crypto_hmac(struct crypto_hash *tfm,
141 u8 *key, unsigned int *keylen,
142 struct scatterlist *sg,
143 unsigned int size, u8 *result)
145 struct hash_desc desc;
149 rv = crypto_hash_setkey(desc.tfm, key, *keylen);
151 CERROR("failed to hash setkey: %d\n", rv);
154 return crypto_hash_digest(&desc, sg, size, result);
158 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
160 return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
163 #ifndef HAVE_SIMPLE_SETATTR
164 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
167 #ifndef SLAB_DESTROY_BY_RCU
168 #define SLAB_DESTROY_BY_RCU 0
171 #ifndef HAVE_DQUOT_SUSPEND
172 # define ll_vfs_dq_init vfs_dq_init
173 # define ll_vfs_dq_drop vfs_dq_drop
174 # define ll_vfs_dq_transfer vfs_dq_transfer
175 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
177 # define ll_vfs_dq_init dquot_initialize
178 # define ll_vfs_dq_drop dquot_drop
179 # define ll_vfs_dq_transfer dquot_transfer
180 # define ll_vfs_dq_off(sb, remount) dquot_suspend(sb, -1)
183 #ifndef HAVE_BLKDEV_GET_BY_DEV
184 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
187 #ifdef HAVE_BVEC_ITER
188 #define bio_idx(bio) (bio->bi_iter.bi_idx)
189 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
190 #define bvl_to_page(bvl) (bvl.bv_page)
192 #define bio_idx(bio) (bio->bi_idx)
193 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
194 #define bio_sectors(bio) ((bio)->bi_size >> 9)
195 #ifndef HAVE_BIO_END_SECTOR
196 #define bio_end_sector(bio) (bio->bi_sector + bio_sectors(bio))
198 #define bvl_to_page(bvl) (bvl->bv_page)
201 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
202 #define blk_queue_max_segments(rq, seg) \
203 do { blk_queue_max_phys_segments(rq, seg); \
204 blk_queue_max_hw_segments(rq, seg); } while (0)
206 #define queue_max_phys_segments(rq) queue_max_segments(rq)
207 #define queue_max_hw_segments(rq) queue_max_segments(rq)
210 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
211 #define ll_kmap_atomic(a, b) kmap_atomic(a)
212 #define ll_kunmap_atomic(a, b) kunmap_atomic(a)
214 #define ll_kmap_atomic(a, b) kmap_atomic(a, b)
215 #define ll_kunmap_atomic(a, b) kunmap_atomic(a, b)
218 #ifndef HAVE_CLEAR_INODE
219 #define clear_inode(i) end_writeback(i)
222 #ifndef HAVE_DENTRY_D_CHILD
223 #define d_child d_u.d_child
226 #ifdef HAVE_DENTRY_D_U_D_ALIAS
227 #define d_alias d_u.d_alias
230 #ifndef DATA_FOR_LLITE_IS_LIST
231 #define ll_d_hlist_node hlist_node
232 #define ll_d_hlist_empty(list) hlist_empty(list)
233 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
234 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
235 # ifdef HAVE_HLIST_FOR_EACH_3ARG
236 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
237 p = NULL; hlist_for_each_entry(dentry, i_dentry, d_alias)
239 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
240 hlist_for_each_entry(dentry, p, i_dentry, d_alias)
242 #define DECLARE_LL_D_HLIST_NODE_PTR(name) struct ll_d_hlist_node *name
244 #define ll_d_hlist_node list_head
245 #define ll_d_hlist_empty(list) list_empty(list)
246 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
247 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
248 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
249 list_for_each_entry(dentry, i_dentry, d_alias)
250 #define DECLARE_LL_D_HLIST_NODE_PTR(name) /* nothing */
251 #endif /* !DATA_FOR_LLITE_IS_LIST */
257 # define NO_QUOTA (-EDQUOT)
261 #define SEEK_DATA 3 /* seek to the next data */
264 #define SEEK_HOLE 4 /* seek to the next hole */
267 #ifndef FMODE_UNSIGNED_OFFSET
268 #define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
271 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
272 # define ext2_set_bit __test_and_set_bit_le
273 # define ext2_clear_bit __test_and_clear_bit_le
274 # define ext2_test_bit test_bit_le
275 # define ext2_find_first_zero_bit find_first_zero_bit_le
276 # define ext2_find_next_zero_bit find_next_zero_bit_le
279 #ifdef ATTR_TIMES_SET
280 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
282 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
285 #ifndef XATTR_NAME_POSIX_ACL_ACCESS
286 # define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
289 #ifndef XATTR_NAME_POSIX_ACL_DEFAULT
290 # define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
293 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
294 # define lm_compare_owner fl_compare_owner
298 * After 3.1, kernel's nameidata.intent.open.flags is different
299 * with lustre's lookup_intent.it_flags, as lustre's it_flags'
300 * lower bits equal to FMODE_xxx while kernel doesn't transliterate
301 * lower bits of nameidata.intent.open.flags to FMODE_xxx.
303 #include <linux/version.h>
304 static inline int ll_namei_to_lookup_intent_flag(int flag)
306 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
307 flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
312 #ifdef HAVE_QC_MAKE_REQUEST_FN
313 # define ll_mrf_ret blk_qc_t
314 # define LL_MRF_RETURN(rc) RETURN(BLK_QC_T_NONE)
316 # ifdef HAVE_VOID_MAKE_REQUEST_FN
317 # define ll_mrf_ret void
318 # define LL_MRF_RETURN(rc)
320 # define ll_mrf_ret int
321 # define LL_MRF_RETURN(rc) RETURN(rc)
325 #include <linux/fs.h>
326 #ifndef HAVE_PROTECT_I_NLINK
327 static inline void set_nlink(struct inode *inode, unsigned int nlink)
329 inode->i_nlink = nlink;
333 #ifdef HAVE_INODEOPS_USE_UMODE_T
334 # define ll_umode_t umode_t
336 # define ll_umode_t int
339 #include <linux/dcache.h>
340 #ifndef HAVE_D_MAKE_ROOT
341 static inline struct dentry *d_make_root(struct inode *root)
343 struct dentry *res = d_alloc_root(root);
345 if (res == NULL && root)
352 #ifdef HAVE_DIRTY_INODE_HAS_FLAG
353 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode), flag)
355 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode))
358 #ifdef HAVE_FILE_F_INODE
359 # define set_file_inode(file, inode) (file)->f_inode = inode
361 # define set_file_inode(file, inode)
364 #ifndef HAVE_FILE_INODE
365 static inline struct inode *file_inode(const struct file *file)
367 return file->f_path.dentry->d_inode;
371 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
372 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
374 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
377 #ifdef HAVE_VFS_RENAME_5ARGS
378 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
379 #elif defined HAVE_VFS_RENAME_6ARGS
380 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
382 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
385 #ifdef HAVE_VFS_UNLINK_3ARGS
386 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
388 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
391 #ifndef HAVE_INODE_LOCK
392 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
393 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
394 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
397 #ifndef HAVE_RADIX_EXCEPTION_ENTRY
398 static inline int radix_tree_exceptional_entry(void *arg)
404 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
405 static inline void truncate_inode_pages_final(struct address_space *map)
407 truncate_inode_pages(map, 0);
408 /* Workaround for LU-118 */
410 spin_lock_irq(&map->tree_lock);
411 spin_unlock_irq(&map->tree_lock);
412 } /* Workaround end */
417 #define SIZE_MAX (~(size_t)0)
420 #ifdef HAVE_SECURITY_IINITSEC_CALLBACK
421 # define ll_security_inode_init_security(inode, dir, name, value, len, \
422 initxattrs, dentry) \
423 security_inode_init_security(inode, dir, &((dentry)->d_name), \
425 #elif defined HAVE_SECURITY_IINITSEC_QSTR
426 # define ll_security_inode_init_security(inode, dir, name, value, len, \
427 initxattrs, dentry) \
428 security_inode_init_security(inode, dir, &((dentry)->d_name), \
430 #else /* !HAVE_SECURITY_IINITSEC_CALLBACK && !HAVE_SECURITY_IINITSEC_QSTR */
431 # define ll_security_inode_init_security(inode, dir, name, value, len, \
432 initxattrs, dentry) \
433 security_inode_init_security(inode, dir, name, value, len)
436 #ifndef bio_for_each_segment_all /* since kernel version 3.9 */
437 #ifdef HAVE_BVEC_ITER
438 #define bio_for_each_segment_all(bv, bio, it) \
439 for (it = 0, bv = (bio)->bi_io_vec; it < (bio)->bi_vcnt; it++, bv++)
441 #define bio_for_each_segment_all(bv, bio, it) bio_for_each_segment(bv, bio, it)
445 #endif /* _LUSTRE_COMPAT_H */