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>
44 #include <obd_support.h>
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)
50 # define LOCK_FS_STRUCT(fs) spin_lock(&(fs)->lock)
51 # define UNLOCK_FS_STRUCT(fs) spin_unlock(&(fs)->lock)
54 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
55 struct dentry *dentry)
73 * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
74 * ATTR_* attributes (see bug 13828)
76 #define ATTR_BLOCKS (1 << 27)
78 #define current_ngroups current_cred()->group_info->ngroups
79 #define current_groups current_cred()->group_info->small_block
82 * OBD need working random driver, thus all our
83 * initialization routines must be called after device
84 * driver initialization
88 #define module_init(a) late_initcall(a)
91 #ifndef MODULE_ALIAS_FS
92 #define MODULE_ALIAS_FS(name)
95 #define LTIME_S(time) (time.tv_sec)
97 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
98 # define ll_generic_permission(inode, mask, flags, check_acl) \
99 generic_permission(inode, mask)
100 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
101 # define ll_generic_permission(inode, mask, flags, check_acl) \
102 generic_permission(inode, mask, flags, check_acl)
104 # define ll_generic_permission(inode, mask, flags, check_acl) \
105 generic_permission(inode, mask, check_acl)
108 #ifdef HAVE_4ARGS_VFS_SYMLINK
109 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
110 vfs_symlink(dir, dentry, path, mode)
112 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
113 vfs_symlink(dir, dentry, path)
116 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_SIZE_5ARGS)
117 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
118 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
120 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
121 generic_file_llseek_size(file, offset, origin, maxbytes);
124 #ifdef HAVE_INODE_DIO_WAIT
125 /* inode_dio_wait(i) use as-is for write lock */
126 # define inode_dio_write_done(i) do {} while (0) /* for write unlock */
128 # define inode_dio_wait(i) down_write(&(i)->i_alloc_sem)
129 # define inode_dio_write_done(i) up_write(&(i)->i_alloc_sem)
132 #ifndef FS_HAS_FIEMAP
133 #define FS_HAS_FIEMAP (0)
136 #ifndef HAVE_SIMPLE_SETATTR
137 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
140 #ifndef SLAB_DESTROY_BY_RCU
141 #define SLAB_DESTROY_BY_RCU 0
144 #ifndef HAVE_DQUOT_SUSPEND
145 # define ll_vfs_dq_init vfs_dq_init
146 # define ll_vfs_dq_drop vfs_dq_drop
147 # define ll_vfs_dq_transfer vfs_dq_transfer
148 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
150 # define ll_vfs_dq_init dquot_initialize
151 # define ll_vfs_dq_drop dquot_drop
152 # define ll_vfs_dq_transfer dquot_transfer
153 # define ll_vfs_dq_off(sb, remount) dquot_suspend(sb, -1)
156 #ifndef HAVE_BLKDEV_GET_BY_DEV
157 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
160 #ifdef HAVE_BVEC_ITER
161 #define bio_idx(bio) (bio->bi_iter.bi_idx)
162 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
163 #define bvl_to_page(bvl) (bvl->bv_page)
165 #define bio_idx(bio) (bio->bi_idx)
166 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
167 #define bio_sectors(bio) ((bio)->bi_size >> 9)
168 #ifndef HAVE_BIO_END_SECTOR
169 #define bio_end_sector(bio) (bio->bi_sector + bio_sectors(bio))
171 #define bvl_to_page(bvl) (bvl->bv_page)
174 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
175 #define blk_queue_max_segments(rq, seg) \
176 do { blk_queue_max_phys_segments(rq, seg); \
177 blk_queue_max_hw_segments(rq, seg); } while (0)
179 #define queue_max_phys_segments(rq) queue_max_segments(rq)
180 #define queue_max_hw_segments(rq) queue_max_segments(rq)
184 #define DECLARE_PLUG(plug) struct blk_plug plug
185 #else /* !HAVE_BLK_PLUG */
186 #define DECLARE_PLUG(name)
187 #define blk_start_plug(plug) do {} while (0)
188 #define blk_finish_plug(plug) do {} while (0)
191 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
192 #define ll_kmap_atomic(a, b) kmap_atomic(a)
193 #define ll_kunmap_atomic(a, b) kunmap_atomic(a)
195 #define ll_kmap_atomic(a, b) kmap_atomic(a, b)
196 #define ll_kunmap_atomic(a, b) kunmap_atomic(a, b)
199 #ifndef HAVE_CLEAR_INODE
200 #define clear_inode(i) end_writeback(i)
203 #ifndef HAVE_DENTRY_D_CHILD
204 #define d_child d_u.d_child
207 #ifdef HAVE_DENTRY_D_U_D_ALIAS
208 #define d_alias d_u.d_alias
211 #ifndef DATA_FOR_LLITE_IS_LIST
212 #define ll_d_hlist_node hlist_node
213 #define ll_d_hlist_empty(list) hlist_empty(list)
214 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
215 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
216 # ifdef HAVE_HLIST_FOR_EACH_3ARG
217 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
218 p = NULL; hlist_for_each_entry(dentry, i_dentry, d_alias)
220 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
221 hlist_for_each_entry(dentry, p, i_dentry, d_alias)
223 #define DECLARE_LL_D_HLIST_NODE_PTR(name) struct ll_d_hlist_node *name
225 #define ll_d_hlist_node list_head
226 #define ll_d_hlist_empty(list) list_empty(list)
227 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
228 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
229 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
230 list_for_each_entry(dentry, i_dentry, d_alias)
231 #define DECLARE_LL_D_HLIST_NODE_PTR(name) /* nothing */
232 #endif /* !DATA_FOR_LLITE_IS_LIST */
238 # define NO_QUOTA (-EDQUOT)
242 #define SEEK_DATA 3 /* seek to the next data */
245 #define SEEK_HOLE 4 /* seek to the next hole */
248 #ifndef FMODE_UNSIGNED_OFFSET
249 #define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
252 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
253 # define ext2_set_bit __test_and_set_bit_le
254 # define ext2_clear_bit __test_and_clear_bit_le
255 # define ext2_test_bit test_bit_le
256 # define ext2_find_first_zero_bit find_first_zero_bit_le
257 # define ext2_find_next_zero_bit find_next_zero_bit_le
260 #ifdef ATTR_TIMES_SET
261 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
263 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
266 #ifndef XATTR_NAME_POSIX_ACL_ACCESS
267 # define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
270 #ifndef XATTR_NAME_POSIX_ACL_DEFAULT
271 # define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
274 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
275 # define lm_compare_owner fl_compare_owner
279 * After 3.1, kernel's nameidata.intent.open.flags is different
280 * with lustre's lookup_intent.it_flags, as lustre's it_flags'
281 * lower bits equal to FMODE_xxx while kernel doesn't transliterate
282 * lower bits of nameidata.intent.open.flags to FMODE_xxx.
284 #include <linux/version.h>
285 static inline int ll_namei_to_lookup_intent_flag(int flag)
287 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
288 flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
293 #include <linux/fs.h>
294 #ifndef HAVE_PROTECT_I_NLINK
295 static inline void set_nlink(struct inode *inode, unsigned int nlink)
297 inode->i_nlink = nlink;
301 #ifdef HAVE_INODEOPS_USE_UMODE_T
302 # define ll_umode_t umode_t
304 # define ll_umode_t int
307 #include <linux/dcache.h>
308 #ifndef HAVE_D_MAKE_ROOT
309 static inline struct dentry *d_make_root(struct inode *root)
311 struct dentry *res = d_alloc_root(root);
313 if (res == NULL && root)
320 #ifdef HAVE_DIRTY_INODE_HAS_FLAG
321 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode), flag)
323 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode))
326 #ifdef HAVE_FILE_F_INODE
327 # define set_file_inode(file, inode) (file)->f_inode = inode
329 # define set_file_inode(file, inode)
332 #ifndef HAVE_FILE_INODE
333 static inline struct inode *file_inode(const struct file *file)
335 return file->f_path.dentry->d_inode;
339 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
340 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
342 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
345 #ifdef HAVE_VFS_RENAME_5ARGS
346 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
347 #elif defined HAVE_VFS_RENAME_6ARGS
348 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
350 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
353 #ifdef HAVE_VFS_UNLINK_3ARGS
354 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
356 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
359 #ifndef HAVE_INODE_LOCK
360 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
361 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
362 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
365 #ifndef HAVE_RADIX_EXCEPTION_ENTRY
366 static inline int radix_tree_exceptional_entry(void *arg)
372 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
373 static inline void truncate_inode_pages_final(struct address_space *map)
375 truncate_inode_pages(map, 0);
376 /* Workaround for LU-118 */
378 spin_lock_irq(&map->tree_lock);
379 spin_unlock_irq(&map->tree_lock);
380 } /* Workaround end */
385 #define SIZE_MAX (~(size_t)0)
388 #ifdef HAVE_SECURITY_IINITSEC_CALLBACK
389 # define ll_security_inode_init_security(inode, dir, name, value, len, \
390 initxattrs, dentry) \
391 security_inode_init_security(inode, dir, &((dentry)->d_name), \
393 #elif defined HAVE_SECURITY_IINITSEC_QSTR
394 # define ll_security_inode_init_security(inode, dir, name, value, len, \
395 initxattrs, dentry) \
396 security_inode_init_security(inode, dir, &((dentry)->d_name), \
398 #else /* !HAVE_SECURITY_IINITSEC_CALLBACK && !HAVE_SECURITY_IINITSEC_QSTR */
399 # define ll_security_inode_init_security(inode, dir, name, value, len, \
400 initxattrs, dentry) \
401 security_inode_init_security(inode, dir, name, value, len)
404 #ifndef bio_for_each_segment_all /* since kernel version 3.9 */
405 #ifdef HAVE_BVEC_ITER
406 #define bio_for_each_segment_all(bv, bio, it) \
407 for (it = 0, bv = (bio)->bi_io_vec; it < (bio)->bi_vcnt; it++, bv++)
409 #define bio_for_each_segment_all(bv, bio, it) bio_for_each_segment(bv, bio, it)
413 #ifdef HAVE_PID_NS_FOR_CHILDREN
414 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns_for_children)
416 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns)
419 #ifdef HAVE_FULL_NAME_HASH_3ARGS
420 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
422 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
425 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
426 # define posix_acl_xattr_header struct posix_acl_xattr_header
427 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
428 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
430 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
433 #ifdef HAVE_IOP_XATTR
434 #ifdef HAVE_XATTR_HANDLER_FLAGS
435 #define ll_setxattr generic_setxattr
436 #define ll_getxattr generic_getxattr
437 #define ll_removexattr generic_removexattr
439 int ll_setxattr(struct dentry *dentry, const char *name,
440 const void *value, size_t size, int flags);
441 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
442 void *buf, size_t buf_size);
443 int ll_removexattr(struct dentry *dentry, const char *name);
444 #endif /* ! HAVE_XATTR_HANDLER_FLAGS */
445 #endif /* HAVE_IOP_XATTR */
447 #ifndef HAVE_VFS_SETXATTR
448 const struct xattr_handler *get_xattr_type(const char *name);
450 #ifdef HAVE_XATTR_HANDLER_FLAGS
452 __vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
453 const void *value, size_t size, int flags)
455 const struct xattr_handler *handler;
458 handler = get_xattr_type(name);
462 #if defined(HAVE_XATTR_HANDLER_INODE_PARAM)
463 rc = handler->set(handler, dentry, inode, name, value, size,
465 #elif defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
466 rc = handler->set(handler, dentry, name, value, size, XATTR_CREATE);
468 rc = handler->set(dentry, name, value, size, XATTR_CREATE,
470 #endif /* !HAVE_XATTR_HANDLER_INODE_PARAM */
473 #else /* !HAVE_XATTR_HANDLER_FLAGS */
475 __vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
476 const void *value, size_t size, int flags)
478 return ll_setxattr(dentry, name, value, size, flags);
480 #endif /* HAVE_XATTR_HANDLER_FLAGS */
481 #endif /* HAVE_VFS_SETXATTR */
483 #ifndef HAVE_IOV_ITER_TRUNCATE
484 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
486 if (i->count > count)
492 static inline bool is_sxid(umode_t mode)
494 return (mode & S_ISUID) || ((mode & S_ISGID) && (mode & S_IXGRP));
499 #define IS_NOSEC(inode) (!is_sxid(inode->i_mode))
503 static inline void inode_has_no_xattr(struct inode *inode)
509 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
510 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
515 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
517 return (struct iovec) {
518 .iov_base = iter->iov->iov_base + iter->iov_offset,
519 .iov_len = min(iter->count,
520 iter->iov->iov_len - iter->iov_offset),
524 #define iov_for_each(iov, iter, start) \
525 for (iter = (start); \
526 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
527 iov_iter_advance(&(iter), (iov).iov_len))
529 static inline ssize_t
530 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
536 iov_for_each(iov, i, *iter) {
539 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
547 if (res < iov.iov_len)
552 iov_iter_advance(iter, bytes);
556 static inline ssize_t
557 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
563 /* Since LLITE updates file size at the end of I/O in
564 * vvp_io_commit_write(), append write has to be done in atomic when
565 * there are multiple segments because otherwise each iteration to
566 * __generic_file_aio_write() will see original file size */
567 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
568 struct iovec *iov_copy;
571 OBD_ALLOC(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
575 iov_for_each(iov, i, *iter)
576 iov_copy[count++] = iov;
578 bytes = __generic_file_aio_write(iocb, iov_copy, count,
580 OBD_FREE(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
583 iov_iter_advance(iter, bytes);
587 iov_for_each(iov, i, *iter) {
590 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
598 if (res < iov.iov_len)
603 iov_iter_advance(iter, bytes);
606 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
608 static inline void __user *get_vmf_address(struct vm_fault *vmf)
610 #ifdef HAVE_VM_FAULT_ADDRESS
611 return (void __user *)vmf->address;
613 return vmf->virtual_address;
617 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
618 # define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
620 # define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
623 #ifndef HAVE_CURRENT_TIME
624 static inline struct timespec current_time(struct inode *inode)
630 #endif /* _LUSTRE_COMPAT_H */