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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef _LUSTRE_COMPAT_H
34 #define _LUSTRE_COMPAT_H
36 #include <linux/fs_struct.h>
37 #include <linux/namei.h>
38 #include <linux/pagemap.h>
39 #include <linux/bio.h>
40 #include <linux/xattr.h>
42 #include <libcfs/libcfs.h>
43 #include <lustre_patchless_compat.h>
45 #ifdef HAVE_FS_STRUCT_RWLOCK
46 # define LOCK_FS_STRUCT(fs) write_lock(&(fs)->lock)
47 # define UNLOCK_FS_STRUCT(fs) write_unlock(&(fs)->lock)
49 # define LOCK_FS_STRUCT(fs) spin_lock(&(fs)->lock)
50 # define UNLOCK_FS_STRUCT(fs) spin_unlock(&(fs)->lock)
53 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
54 struct dentry *dentry)
72 * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
73 * ATTR_* attributes (see bug 13828)
75 #define ATTR_BLOCKS (1 << 27)
77 #define current_ngroups current_cred()->group_info->ngroups
78 #define current_groups current_cred()->group_info->small_block
81 * OBD need working random driver, thus all our
82 * initialization routines must be called after device
83 * driver initialization
87 #define module_init(a) late_initcall(a)
90 #ifndef MODULE_ALIAS_FS
91 #define MODULE_ALIAS_FS(name)
94 #define LTIME_S(time) (time.tv_sec)
96 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
97 # define ll_generic_permission(inode, mask, flags, check_acl) \
98 generic_permission(inode, mask)
99 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
100 # define ll_generic_permission(inode, mask, flags, check_acl) \
101 generic_permission(inode, mask, flags, check_acl)
103 # define ll_generic_permission(inode, mask, flags, check_acl) \
104 generic_permission(inode, mask, check_acl)
107 #ifdef HAVE_4ARGS_VFS_SYMLINK
108 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
109 vfs_symlink(dir, dentry, path, mode)
111 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
112 vfs_symlink(dir, dentry, path)
115 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_SIZE_5ARGS)
116 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
117 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
119 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
120 generic_file_llseek_size(file, offset, origin, maxbytes);
123 #ifdef HAVE_INODE_DIO_WAIT
124 /* inode_dio_wait(i) use as-is for write lock */
125 # define inode_dio_write_done(i) do {} while (0) /* for write unlock */
127 # define inode_dio_wait(i) down_write(&(i)->i_alloc_sem)
128 # define inode_dio_write_done(i) up_write(&(i)->i_alloc_sem)
131 #ifndef FS_HAS_FIEMAP
132 #define FS_HAS_FIEMAP (0)
135 #ifndef HAVE_SIMPLE_SETATTR
136 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
139 #ifndef SLAB_DESTROY_BY_RCU
140 #define SLAB_DESTROY_BY_RCU 0
143 #ifndef HAVE_DQUOT_SUSPEND
144 # define ll_vfs_dq_init vfs_dq_init
145 # define ll_vfs_dq_drop vfs_dq_drop
146 # define ll_vfs_dq_transfer vfs_dq_transfer
147 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
149 # define ll_vfs_dq_init dquot_initialize
150 # define ll_vfs_dq_drop dquot_drop
151 # define ll_vfs_dq_transfer dquot_transfer
152 # define ll_vfs_dq_off(sb, remount) dquot_suspend(sb, -1)
155 #ifndef HAVE_BLKDEV_GET_BY_DEV
156 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
159 #ifdef HAVE_BVEC_ITER
160 #define bio_idx(bio) (bio->bi_iter.bi_idx)
161 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
162 #define bvl_to_page(bvl) (bvl->bv_page)
164 #define bio_idx(bio) (bio->bi_idx)
165 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
166 #define bio_sectors(bio) ((bio)->bi_size >> 9)
167 #ifndef HAVE_BIO_END_SECTOR
168 #define bio_end_sector(bio) (bio->bi_sector + bio_sectors(bio))
170 #define bvl_to_page(bvl) (bvl->bv_page)
173 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
174 #define blk_queue_max_segments(rq, seg) \
175 do { blk_queue_max_phys_segments(rq, seg); \
176 blk_queue_max_hw_segments(rq, seg); } while (0)
178 #define queue_max_phys_segments(rq) queue_max_segments(rq)
179 #define queue_max_hw_segments(rq) queue_max_segments(rq)
183 #define DECLARE_PLUG(plug) struct blk_plug plug
184 #else /* !HAVE_BLK_PLUG */
185 #define DECLARE_PLUG(name)
186 #define blk_start_plug(plug) do {} while (0)
187 #define blk_finish_plug(plug) do {} while (0)
190 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
191 #define ll_kmap_atomic(a, b) kmap_atomic(a)
192 #define ll_kunmap_atomic(a, b) kunmap_atomic(a)
194 #define ll_kmap_atomic(a, b) kmap_atomic(a, b)
195 #define ll_kunmap_atomic(a, b) kunmap_atomic(a, b)
198 #ifndef HAVE_CLEAR_INODE
199 #define clear_inode(i) end_writeback(i)
202 #ifndef HAVE_DENTRY_D_CHILD
203 #define d_child d_u.d_child
206 #ifdef HAVE_DENTRY_D_U_D_ALIAS
207 #define d_alias d_u.d_alias
210 #ifndef DATA_FOR_LLITE_IS_LIST
211 #define ll_d_hlist_node hlist_node
212 #define ll_d_hlist_empty(list) hlist_empty(list)
213 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
214 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
215 # ifdef HAVE_HLIST_FOR_EACH_3ARG
216 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
217 p = NULL; hlist_for_each_entry(dentry, i_dentry, d_alias)
219 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
220 hlist_for_each_entry(dentry, p, i_dentry, d_alias)
222 #define DECLARE_LL_D_HLIST_NODE_PTR(name) struct ll_d_hlist_node *name
224 #define ll_d_hlist_node list_head
225 #define ll_d_hlist_empty(list) list_empty(list)
226 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
227 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
228 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
229 list_for_each_entry(dentry, i_dentry, d_alias)
230 #define DECLARE_LL_D_HLIST_NODE_PTR(name) /* nothing */
231 #endif /* !DATA_FOR_LLITE_IS_LIST */
237 # define NO_QUOTA (-EDQUOT)
241 #define SEEK_DATA 3 /* seek to the next data */
244 #define SEEK_HOLE 4 /* seek to the next hole */
247 #ifndef FMODE_UNSIGNED_OFFSET
248 #define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
251 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
252 # define ext2_set_bit __test_and_set_bit_le
253 # define ext2_clear_bit __test_and_clear_bit_le
254 # define ext2_test_bit test_bit_le
255 # define ext2_find_first_zero_bit find_first_zero_bit_le
256 # define ext2_find_next_zero_bit find_next_zero_bit_le
259 #ifdef ATTR_TIMES_SET
260 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
262 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
265 #ifndef XATTR_NAME_POSIX_ACL_ACCESS
266 # define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
269 #ifndef XATTR_NAME_POSIX_ACL_DEFAULT
270 # define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
273 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
274 # define lm_compare_owner fl_compare_owner
278 * After 3.1, kernel's nameidata.intent.open.flags is different
279 * with lustre's lookup_intent.it_flags, as lustre's it_flags'
280 * lower bits equal to FMODE_xxx while kernel doesn't transliterate
281 * lower bits of nameidata.intent.open.flags to FMODE_xxx.
283 #include <linux/version.h>
284 static inline int ll_namei_to_lookup_intent_flag(int flag)
286 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
287 flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
292 #ifdef HAVE_QC_MAKE_REQUEST_FN
293 # define ll_mrf_ret blk_qc_t
294 # define LL_MRF_RETURN(rc) RETURN(BLK_QC_T_NONE)
296 # ifdef HAVE_VOID_MAKE_REQUEST_FN
297 # define ll_mrf_ret void
298 # define LL_MRF_RETURN(rc)
300 # define ll_mrf_ret int
301 # define LL_MRF_RETURN(rc) RETURN(rc)
305 #include <linux/fs.h>
306 #ifndef HAVE_PROTECT_I_NLINK
307 static inline void set_nlink(struct inode *inode, unsigned int nlink)
309 inode->i_nlink = nlink;
313 #ifdef HAVE_INODEOPS_USE_UMODE_T
314 # define ll_umode_t umode_t
316 # define ll_umode_t int
319 #include <linux/dcache.h>
320 #ifndef HAVE_D_MAKE_ROOT
321 static inline struct dentry *d_make_root(struct inode *root)
323 struct dentry *res = d_alloc_root(root);
325 if (res == NULL && root)
332 #ifdef HAVE_DIRTY_INODE_HAS_FLAG
333 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode), flag)
335 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode))
338 #ifdef HAVE_FILE_F_INODE
339 # define set_file_inode(file, inode) (file)->f_inode = inode
341 # define set_file_inode(file, inode)
344 #ifndef HAVE_FILE_INODE
345 static inline struct inode *file_inode(const struct file *file)
347 return file->f_path.dentry->d_inode;
351 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
352 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
354 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
357 #ifdef HAVE_VFS_RENAME_5ARGS
358 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
359 #elif defined HAVE_VFS_RENAME_6ARGS
360 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
362 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
365 #ifdef HAVE_VFS_UNLINK_3ARGS
366 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
368 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
371 #ifndef HAVE_INODE_LOCK
372 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
373 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
374 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
377 #ifndef HAVE_RADIX_EXCEPTION_ENTRY
378 static inline int radix_tree_exceptional_entry(void *arg)
384 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
385 static inline void truncate_inode_pages_final(struct address_space *map)
387 truncate_inode_pages(map, 0);
388 /* Workaround for LU-118 */
390 spin_lock_irq(&map->tree_lock);
391 spin_unlock_irq(&map->tree_lock);
392 } /* Workaround end */
397 #define SIZE_MAX (~(size_t)0)
400 #ifdef HAVE_SECURITY_IINITSEC_CALLBACK
401 # define ll_security_inode_init_security(inode, dir, name, value, len, \
402 initxattrs, dentry) \
403 security_inode_init_security(inode, dir, &((dentry)->d_name), \
405 #elif defined HAVE_SECURITY_IINITSEC_QSTR
406 # define ll_security_inode_init_security(inode, dir, name, value, len, \
407 initxattrs, dentry) \
408 security_inode_init_security(inode, dir, &((dentry)->d_name), \
410 #else /* !HAVE_SECURITY_IINITSEC_CALLBACK && !HAVE_SECURITY_IINITSEC_QSTR */
411 # define ll_security_inode_init_security(inode, dir, name, value, len, \
412 initxattrs, dentry) \
413 security_inode_init_security(inode, dir, name, value, len)
416 #ifndef bio_for_each_segment_all /* since kernel version 3.9 */
417 #ifdef HAVE_BVEC_ITER
418 #define bio_for_each_segment_all(bv, bio, it) \
419 for (it = 0, bv = (bio)->bi_io_vec; it < (bio)->bi_vcnt; it++, bv++)
421 #define bio_for_each_segment_all(bv, bio, it) bio_for_each_segment(bv, bio, it)
425 #ifdef HAVE_PID_NS_FOR_CHILDREN
426 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns_for_children)
428 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns)
431 #ifdef HAVE_FULL_NAME_HASH_3ARGS
432 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
434 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
437 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
438 # define posix_acl_xattr_header struct posix_acl_xattr_header
439 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
440 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
442 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
445 #endif /* _LUSTRE_COMPAT_H */