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, 2017, 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/aio.h>
38 #include <linux/fs_struct.h>
39 #include <linux/namei.h>
40 #include <linux/pagemap.h>
41 #include <linux/posix_acl_xattr.h>
42 #include <linux/bio.h>
43 #include <linux/xattr.h>
44 #include <linux/workqueue.h>
45 #include <linux/blkdev.h>
46 #include <linux/slab.h>
48 #include <libcfs/linux/linux-fs.h>
49 #include <obd_support.h>
51 #define current_ngroups current_cred()->group_info->ngroups
52 #define current_groups current_cred()->group_info->small_block
54 #ifdef HAVE_4ARGS_VFS_SYMLINK
55 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
56 vfs_symlink(dir, dentry, path, mode)
58 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
59 vfs_symlink(dir, dentry, path)
62 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_SIZE_5ARGS)
63 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
64 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
66 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
67 generic_file_llseek_size(file, offset, origin, maxbytes);
70 #ifdef HAVE_INODE_DIO_WAIT
71 /* inode_dio_wait(i) use as-is for write lock */
72 # define inode_dio_write_done(i) do {} while (0) /* for write unlock */
74 # define inode_dio_wait(i) down_write(&(i)->i_alloc_sem)
75 # define inode_dio_write_done(i) up_write(&(i)->i_alloc_sem)
78 #ifndef HAVE_INIT_LIST_HEAD_RCU
79 static inline void INIT_LIST_HEAD_RCU(struct list_head *list)
81 WRITE_ONCE(list->next, list);
82 WRITE_ONCE(list->prev, list);
87 #define bio_idx(bio) (bio->bi_iter.bi_idx)
88 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
89 #define bvl_to_page(bvl) (bvl->bv_page)
91 #define bio_idx(bio) (bio->bi_idx)
92 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
93 #define bio_sectors(bio) ((bio)->bi_size >> 9)
94 #ifndef HAVE_BIO_END_SECTOR
95 #define bio_end_sector(bio) (bio->bi_sector + bio_sectors(bio))
97 #define bvl_to_page(bvl) (bvl->bv_page)
100 #ifdef HAVE_BVEC_ITER
101 #define bio_start_sector(bio) (bio->bi_iter.bi_sector)
103 #define bio_start_sector(bio) (bio->bi_sector)
106 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
107 #define ll_kmap_atomic(a, b) kmap_atomic(a)
108 #define ll_kunmap_atomic(a, b) kunmap_atomic(a)
110 #define ll_kmap_atomic(a, b) kmap_atomic(a, b)
111 #define ll_kunmap_atomic(a, b) kunmap_atomic(a, b)
114 #ifndef HAVE_CLEAR_INODE
115 #define clear_inode(i) end_writeback(i)
118 #ifndef HAVE_DENTRY_D_CHILD
119 #define d_child d_u.d_child
122 #ifdef HAVE_DENTRY_D_U_D_ALIAS
123 #define d_alias d_u.d_alias
126 #ifndef DATA_FOR_LLITE_IS_LIST
127 #define ll_d_hlist_node hlist_node
128 #define ll_d_hlist_empty(list) hlist_empty(list)
129 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
130 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
131 # ifdef HAVE_HLIST_FOR_EACH_3ARG
132 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
133 p = NULL; hlist_for_each_entry(dentry, i_dentry, d_alias)
135 # define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
136 hlist_for_each_entry(dentry, p, i_dentry, d_alias)
138 #define DECLARE_LL_D_HLIST_NODE_PTR(name) struct ll_d_hlist_node *name
140 #define ll_d_hlist_node list_head
141 #define ll_d_hlist_empty(list) list_empty(list)
142 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
143 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
144 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry) \
145 list_for_each_entry(dentry, i_dentry, d_alias)
146 #define DECLARE_LL_D_HLIST_NODE_PTR(name) /* nothing */
147 #endif /* !DATA_FOR_LLITE_IS_LIST */
149 #ifndef HAVE_D_IN_LOOKUP
150 static inline int d_in_lookup(struct dentry *dentry)
160 # define NO_QUOTA (-EDQUOT)
164 #define SEEK_DATA 3 /* seek to the next data */
167 #define SEEK_HOLE 4 /* seek to the next hole */
170 #ifndef FMODE_UNSIGNED_OFFSET
171 #define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
174 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
175 # define ext2_set_bit __test_and_set_bit_le
176 # define ext2_clear_bit __test_and_clear_bit_le
177 # define ext2_test_bit test_bit_le
178 # define ext2_find_first_zero_bit find_first_zero_bit_le
179 # define ext2_find_next_zero_bit find_next_zero_bit_le
182 #ifdef ATTR_TIMES_SET
183 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
185 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
188 #ifndef XATTR_NAME_POSIX_ACL_ACCESS
189 # define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
192 #ifndef XATTR_NAME_POSIX_ACL_DEFAULT
193 # define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
196 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
197 # define lm_compare_owner fl_compare_owner
201 * After 3.1, kernel's nameidata.intent.open.flags is different
202 * with lustre's lookup_intent.it_flags, as lustre's it_flags'
203 * lower bits equal to FMODE_xxx while kernel doesn't transliterate
204 * lower bits of nameidata.intent.open.flags to FMODE_xxx.
206 #include <linux/version.h>
207 static inline int ll_namei_to_lookup_intent_flag(int flag)
209 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
210 flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
215 #include <linux/fs.h>
216 #ifndef HAVE_PROTECT_I_NLINK
217 static inline void set_nlink(struct inode *inode, unsigned int nlink)
219 inode->i_nlink = nlink;
223 #ifdef HAVE_INODEOPS_USE_UMODE_T
224 # define ll_umode_t umode_t
226 # define ll_umode_t int
229 #ifndef HAVE_VM_FAULT_T
230 #define vm_fault_t int
233 #include <linux/dcache.h>
234 #ifndef HAVE_D_MAKE_ROOT
235 static inline struct dentry *d_make_root(struct inode *root)
237 struct dentry *res = d_alloc_root(root);
239 if (res == NULL && root)
246 #ifndef HAVE_FOP_ITERATE_SHARED
247 #define iterate_shared iterate
250 #ifdef HAVE_DIRTY_INODE_HAS_FLAG
251 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode), flag)
253 # define ll_dirty_inode(inode, flag) (inode)->i_sb->s_op->dirty_inode((inode))
256 #ifdef HAVE_FILE_F_INODE
257 # define set_file_inode(file, inode) (file)->f_inode = inode
259 # define set_file_inode(file, inode)
262 #ifndef HAVE_FILE_INODE
263 static inline struct inode *file_inode(const struct file *file)
265 return file->f_path.dentry->d_inode;
269 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
270 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
272 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
275 #ifdef HAVE_VFS_RENAME_5ARGS
276 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
277 #elif defined HAVE_VFS_RENAME_6ARGS
278 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
280 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
283 #ifdef HAVE_VFS_UNLINK_3ARGS
284 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
286 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
289 #ifndef HAVE_INODE_OWNER_OR_CAPABLE
290 #define inode_owner_or_capable(inode) is_owner_or_cap(inode)
293 static inline int ll_vfs_getattr(struct path *path, struct kstat *st)
297 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
298 rc = vfs_getattr(path, st, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
299 #elif defined HAVE_VFS_GETATTR_2ARGS
300 rc = vfs_getattr(path, st);
302 rc = vfs_getattr(path->mnt, path->dentry, st);
307 #ifndef HAVE_D_IS_POSITIVE
308 static inline bool d_is_positive(const struct dentry *dentry)
310 return dentry->d_inode != NULL;
314 #ifdef HAVE_VFS_CREATE_USE_NAMEIDATA
315 # define LL_VFS_CREATE_FALSE NULL
317 # define LL_VFS_CREATE_FALSE false
320 #ifndef HAVE_INODE_LOCK
321 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
322 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
323 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
326 #ifndef HAVE_RADIX_EXCEPTION_ENTRY
327 static inline int radix_tree_exceptional_entry(void *arg)
333 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
334 static inline void truncate_inode_pages_final(struct address_space *map)
336 truncate_inode_pages(map, 0);
340 #ifndef HAVE_PTR_ERR_OR_ZERO
341 static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
351 #define SIZE_MAX (~(size_t)0)
354 #ifdef HAVE_SECURITY_IINITSEC_CALLBACK
355 # define ll_security_inode_init_security(inode, dir, name, value, len, \
356 initxattrs, dentry) \
357 security_inode_init_security(inode, dir, &((dentry)->d_name), \
359 #elif defined HAVE_SECURITY_IINITSEC_QSTR
360 # define ll_security_inode_init_security(inode, dir, name, value, len, \
361 initxattrs, dentry) \
362 security_inode_init_security(inode, dir, &((dentry)->d_name), \
364 #else /* !HAVE_SECURITY_IINITSEC_CALLBACK && !HAVE_SECURITY_IINITSEC_QSTR */
365 # define ll_security_inode_init_security(inode, dir, name, value, len, \
366 initxattrs, dentry) \
367 security_inode_init_security(inode, dir, name, value, len)
370 #ifndef bio_for_each_segment_all /* since kernel version 3.9 */
371 #ifdef HAVE_BVEC_ITER
372 #define bio_for_each_segment_all(bv, bio, it) \
373 for (it = 0, bv = (bio)->bi_io_vec; it < (bio)->bi_vcnt; it++, bv++)
375 #define bio_for_each_segment_all(bv, bio, it) bio_for_each_segment(bv, bio, it)
379 #ifdef HAVE_PID_NS_FOR_CHILDREN
380 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns_for_children)
382 # define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns)
385 #ifdef HAVE_FULL_NAME_HASH_3ARGS
386 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
388 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
391 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
392 # define posix_acl_xattr_header struct posix_acl_xattr_header
393 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
394 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
396 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
399 #ifdef HAVE_IOP_XATTR
400 #define ll_setxattr generic_setxattr
401 #define ll_getxattr generic_getxattr
402 #define ll_removexattr generic_removexattr
403 #endif /* HAVE_IOP_XATTR */
405 #ifndef HAVE_VFS_SETXATTR
406 const struct xattr_handler *get_xattr_type(const char *name);
409 __vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
410 const void *value, size_t size, int flags)
412 const struct xattr_handler *handler;
415 handler = get_xattr_type(name);
419 # if defined(HAVE_XATTR_HANDLER_INODE_PARAM)
420 rc = handler->set(handler, dentry, inode, name, value, size, flags);
421 # elif defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
422 rc = handler->set(handler, dentry, name, value, size, flags);
424 rc = handler->set(dentry, name, value, size, flags, handler->flags);
425 # endif /* !HAVE_XATTR_HANDLER_INODE_PARAM */
428 #endif /* HAVE_VFS_SETXATTR */
430 #ifndef HAVE_POSIXACL_USER_NS
432 * Mask out &init_user_ns so we don't jump
433 * through hoops to define it somehow only
434 * to have it ignored anyway.
436 #define posix_acl_from_xattr(a, b, c) posix_acl_from_xattr(b, c)
437 #define posix_acl_to_xattr(a, b, c, d) posix_acl_to_xattr(b, c, d)
440 #ifndef HAVE_POSIX_ACL_VALID_USER_NS
441 #define posix_acl_valid(a,b) posix_acl_valid(b)
444 #ifdef HAVE_IOP_SET_ACL
445 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
446 #ifndef HAVE_POSIX_ACL_UPDATE_MODE
447 static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
448 struct posix_acl **acl)
450 umode_t mode = inode->i_mode;
453 error = posix_acl_equiv_mode(*acl, &mode);
458 if (!in_group_p(inode->i_gid) &&
459 !capable_wrt_inode_uidgid(inode, CAP_FSETID))
464 #endif /* HAVE_POSIX_ACL_UPDATE_MODE */
468 #ifndef HAVE_IOV_ITER_TRUNCATE
469 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
471 if (i->count > count)
477 static inline bool is_sxid(umode_t mode)
479 return (mode & S_ISUID) || ((mode & S_ISGID) && (mode & S_IXGRP));
484 #define IS_NOSEC(inode) (!is_sxid(inode->i_mode))
488 * mount MS_* flags split from superblock SB_* flags
489 * if the SB_* flags are not available use the MS_* flags
491 #if !defined(SB_RDONLY) && defined(MS_RDONLY)
492 # define SB_RDONLY MS_RDONLY
494 #if !defined(SB_ACTIVE) && defined(MS_ACTIVE)
495 # define SB_ACTIVE MS_ACTIVE
497 #if !defined(SB_NOSEC) && defined(MS_NOSEC)
498 # define SB_NOSEC MS_NOSEC
500 #if !defined(SB_POSIXACL) && defined(MS_POSIXACL)
501 # define SB_POSIXACL MS_POSIXACL
503 #if !defined(SB_NODIRATIME) && defined(MS_NODIRATIME)
504 # define SB_NODIRATIME MS_NODIRATIME
507 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
508 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
513 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
515 return (struct iovec) {
516 .iov_base = iter->iov->iov_base + iter->iov_offset,
517 .iov_len = min(iter->count,
518 iter->iov->iov_len - iter->iov_offset),
522 #define iov_for_each(iov, iter, start) \
523 for (iter = (start); \
524 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
525 iov_iter_advance(&(iter), (iov).iov_len))
527 static inline ssize_t
528 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
534 iov_for_each(iov, i, *iter) {
537 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
545 if (res < iov.iov_len)
550 iov_iter_advance(iter, bytes);
554 static inline ssize_t
555 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
561 /* Since LLITE updates file size at the end of I/O in
562 * vvp_io_commit_write(), append write has to be done in atomic when
563 * there are multiple segments because otherwise each iteration to
564 * __generic_file_aio_write() will see original file size */
565 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
566 struct iovec *iov_copy;
569 OBD_ALLOC(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
573 iov_for_each(iov, i, *iter)
574 iov_copy[count++] = iov;
576 bytes = __generic_file_aio_write(iocb, iov_copy, count,
578 OBD_FREE(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
581 iov_iter_advance(iter, bytes);
585 iov_for_each(iov, i, *iter) {
588 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
596 if (res < iov.iov_len)
601 iov_iter_advance(iter, bytes);
604 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
606 static inline void __user *get_vmf_address(struct vm_fault *vmf)
608 #ifdef HAVE_VM_FAULT_ADDRESS
609 return (void __user *)vmf->address;
611 return vmf->virtual_address;
615 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
616 # define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
618 # define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
621 #ifndef HAVE_CURRENT_TIME
622 static inline struct timespec current_time(struct inode *inode)
630 * time_after32 - compare two 32-bit relative times
631 * @a: the time which may be after @b
632 * @b: the time which may be before @a
634 * time_after32(a, b) returns true if the time @a is after time @b.
635 * time_before32(b, a) returns true if the time @b is before time @a.
637 * Similar to time_after(), compare two 32-bit timestamps for relative
638 * times. This is useful for comparing 32-bit seconds values that can't
639 * be converted to 64-bit values (e.g. due to disk format or wire protocol
640 * issues) when it is known that the times are less than 68 years apart.
642 #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
643 #define time_before32(b, a) time_after32(a, b)
651 #ifndef alloc_workqueue
652 #define alloc_workqueue(name, flags, max_active) create_workqueue(name)
656 #define smp_store_mb(var, value) set_mb(var, value)
660 #define READ_ONCE ACCESS_ONCE
663 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
664 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
666 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
667 return bi->interval_exp ? 1 << bi->interval_exp : 0;
668 #elif defined(HAVE_INTERVAL_BLK_INTEGRITY)
671 return bi->sector_size;
672 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
675 static inline const char *blk_integrity_name(struct blk_integrity *bi)
677 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
678 return bi->profile->name;
684 static inline unsigned int bip_size(struct bio_integrity_payload *bip)
686 #ifdef HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
687 return bip->bip_iter.bi_size;
689 return bip->bip_size;
692 #else /* !CONFIG_BLK_DEV_INTEGRITY */
693 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
697 static inline const char *blk_integrity_name(struct blk_integrity *bi)
699 /* gcc8 dislikes when strcmp() is called against NULL */
702 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
704 #ifndef INTEGRITY_FLAG_READ
705 #define INTEGRITY_FLAG_READ BLK_INTEGRITY_VERIFY
708 #ifndef INTEGRITY_FLAG_WRITE
709 #define INTEGRITY_FLAG_WRITE BLK_INTEGRITY_GENERATE
712 static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
714 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
715 struct blk_integrity *bi = bdev_get_integrity(bdev);
720 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
721 if (rw == 0 && bi->profile->verify_fn != NULL &&
722 (bi->flags & INTEGRITY_FLAG_READ))
725 if (rw == 1 && bi->profile->generate_fn != NULL &&
726 (bi->flags & INTEGRITY_FLAG_WRITE))
729 if (rw == 0 && bi->verify_fn != NULL &&
730 (bi->flags & INTEGRITY_FLAG_READ))
733 if (rw == 1 && bi->generate_fn != NULL &&
734 (bi->flags & INTEGRITY_FLAG_WRITE))
736 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
737 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
742 #ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
743 #define ll_pagevec_init(pvec, n) pagevec_init(pvec)
745 #define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
749 # define ll_d_count(d) d_count(d)
751 # define ll_d_count(d) ((d)->d_count)
752 #endif /* HAVE_D_COUNT */
754 #ifndef HAVE_IN_COMPAT_SYSCALL
755 #define in_compat_syscall is_compat_task
759 #define page_tree i_pages
761 #define i_pages tree_lock
764 #ifndef xa_lock_irqsave
765 #define xa_lock_irqsave(lockp, flags) spin_lock_irqsave(lockp, flags)
766 #define xa_unlock_irqrestore(lockp, flags) spin_unlock_irqrestore(lockp, flags)
769 #ifndef HAVE_LOCK_PAGE_MEMCG
770 #define lock_page_memcg(page) do {} while (0)
771 #define unlock_page_memcg(page) do {} while (0)
774 #ifndef KMEM_CACHE_USERCOPY
775 #define kmem_cache_create_usercopy(name, size, align, flags, useroffset, \
777 kmem_cache_create(name, size, align, flags, ctor)
780 #ifndef HAVE_LINUX_SELINUX_IS_ENABLED
781 #define selinux_is_enabled() 1
784 #endif /* _LUSTRE_COMPAT_H */