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/
32 #ifndef _LUSTRE_COMPAT_H
33 #define _LUSTRE_COMPAT_H
35 #include <linux/aio.h>
37 #include <linux/namei.h>
38 #include <linux/pagemap.h>
39 #include <linux/posix_acl_xattr.h>
40 #include <linux/bio.h>
41 #include <linux/xattr.h>
42 #include <linux/workqueue.h>
43 #include <linux/blkdev.h>
44 #include <linux/slab.h>
45 #include <linux/security.h>
47 #include <libcfs/linux/linux-fs.h>
48 #include <obd_support.h>
50 #ifdef HAVE_4ARGS_VFS_SYMLINK
51 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
52 vfs_symlink(dir, dentry, path, mode)
54 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
55 vfs_symlink(dir, dentry, path)
59 #define bio_idx(bio) (bio->bi_iter.bi_idx)
60 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
61 #define bvl_to_page(bvl) (bvl->bv_page)
63 #define bio_idx(bio) (bio->bi_idx)
64 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
65 #define bio_sectors(bio) ((bio)->bi_size >> 9)
66 #define bvl_to_page(bvl) (bvl->bv_page)
70 #define bio_start_sector(bio) (bio->bi_iter.bi_sector)
72 #define bio_start_sector(bio) (bio->bi_sector)
75 #ifndef HAVE_DENTRY_D_CHILD
76 #define d_child d_u.d_child
79 #ifdef HAVE_DENTRY_D_U_D_ALIAS
80 #define d_alias d_u.d_alias
83 #ifndef HAVE_D_IN_LOOKUP
84 static inline int d_in_lookup(struct dentry *dentry)
90 #ifndef HAVE_VM_FAULT_T
91 #define vm_fault_t int
94 #ifndef HAVE_FOP_ITERATE_SHARED
95 #define iterate_shared iterate
98 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
99 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
101 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
104 #ifdef HAVE_VFS_RENAME_5ARGS
105 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
106 #elif defined HAVE_VFS_RENAME_6ARGS
107 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
109 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
112 #ifdef HAVE_VFS_UNLINK_3ARGS
113 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
115 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
118 static inline int ll_vfs_getattr(struct path *path, struct kstat *st,
119 u32 request_mask, unsigned int flags)
123 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
124 rc = vfs_getattr(path, st, request_mask, flags);
126 rc = vfs_getattr(path, st);
131 #ifndef HAVE_D_IS_POSITIVE
132 static inline bool d_is_positive(const struct dentry *dentry)
134 return dentry->d_inode != NULL;
138 #ifndef HAVE_INODE_LOCK
139 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
140 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
141 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
144 /* Old kernels lacked both Xarray support and the page cache
145 * using Xarrays. Our back ported Xarray support introduces
146 * the real xa_is_value() but we need a wrapper as well for
147 * the page cache interaction. Lets keep xa_is_value() separate
148 * in old kernels for Xarray support and page cache handling.
150 #ifndef HAVE_XARRAY_SUPPORT
151 static inline bool ll_xa_is_value(void *entry)
153 return radix_tree_exceptional_entry(entry);
156 #define ll_xa_is_value xa_is_value
159 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
160 static inline void truncate_inode_pages_final(struct address_space *map)
162 truncate_inode_pages(map, 0);
166 #ifndef HAVE_PTR_ERR_OR_ZERO
167 static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
176 #ifdef HAVE_PID_NS_FOR_CHILDREN
177 # define ll_task_pid_ns(task) \
178 ((task)->nsproxy ? ((task)->nsproxy->pid_ns_for_children) : NULL)
180 # define ll_task_pid_ns(task) \
181 ((task)->nsproxy ? ((task)->nsproxy->pid_ns) : NULL)
184 #ifdef HAVE_FULL_NAME_HASH_3ARGS
185 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
187 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
190 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
191 # define posix_acl_xattr_header struct posix_acl_xattr_header
192 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
193 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
195 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
198 #ifdef HAVE_IOP_XATTR
199 #define ll_setxattr generic_setxattr
200 #define ll_getxattr generic_getxattr
201 #define ll_removexattr generic_removexattr
202 #endif /* HAVE_IOP_XATTR */
204 #ifndef HAVE_POSIX_ACL_VALID_USER_NS
205 #define posix_acl_valid(a,b) posix_acl_valid(b)
208 #ifdef HAVE_IOP_SET_ACL
209 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
210 #ifndef HAVE_POSIX_ACL_UPDATE_MODE
211 static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
212 struct posix_acl **acl)
214 umode_t mode = inode->i_mode;
217 error = posix_acl_equiv_mode(*acl, &mode);
222 if (!in_group_p(inode->i_gid) &&
223 !capable_wrt_inode_uidgid(inode, CAP_FSETID))
228 #endif /* HAVE_POSIX_ACL_UPDATE_MODE */
232 #ifndef HAVE_IOV_ITER_TRUNCATE
233 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
235 if (i->count > count)
241 * mount MS_* flags split from superblock SB_* flags
242 * if the SB_* flags are not available use the MS_* flags
244 #if !defined(SB_RDONLY) && defined(MS_RDONLY)
245 # define SB_RDONLY MS_RDONLY
247 #if !defined(SB_ACTIVE) && defined(MS_ACTIVE)
248 # define SB_ACTIVE MS_ACTIVE
250 #if !defined(SB_NOSEC) && defined(MS_NOSEC)
251 # define SB_NOSEC MS_NOSEC
253 #if !defined(SB_POSIXACL) && defined(MS_POSIXACL)
254 # define SB_POSIXACL MS_POSIXACL
256 #if !defined(SB_NODIRATIME) && defined(MS_NODIRATIME)
257 # define SB_NODIRATIME MS_NODIRATIME
260 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
261 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
266 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
268 return (struct iovec) {
269 .iov_base = iter->iov->iov_base + iter->iov_offset,
270 .iov_len = min(iter->count,
271 iter->iov->iov_len - iter->iov_offset),
275 #define iov_for_each(iov, iter, start) \
276 for (iter = (start); \
277 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
278 iov_iter_advance(&(iter), (iov).iov_len))
280 static inline ssize_t
281 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
287 iov_for_each(iov, i, *iter) {
290 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
298 if (res < iov.iov_len)
303 iov_iter_advance(iter, bytes);
307 static inline ssize_t
308 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
314 /* Since LLITE updates file size at the end of I/O in
315 * vvp_io_commit_write(), append write has to be done in atomic when
316 * there are multiple segments because otherwise each iteration to
317 * __generic_file_aio_write() will see original file size */
318 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
319 struct iovec *iov_copy;
322 OBD_ALLOC_PTR_ARRAY(iov_copy, iter->nr_segs);
326 iov_for_each(iov, i, *iter)
327 iov_copy[count++] = iov;
329 bytes = __generic_file_aio_write(iocb, iov_copy, count,
331 OBD_FREE_PTR_ARRAY(iov_copy, iter->nr_segs);
334 iov_iter_advance(iter, bytes);
338 iov_for_each(iov, i, *iter) {
341 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
349 if (res < iov.iov_len)
354 iov_iter_advance(iter, bytes);
357 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
359 static inline void __user *get_vmf_address(struct vm_fault *vmf)
361 #ifdef HAVE_VM_FAULT_ADDRESS
362 return (void __user *)vmf->address;
364 return vmf->virtual_address;
368 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
369 # define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
371 # define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
374 #ifndef HAVE_CURRENT_TIME
375 static inline struct timespec current_time(struct inode *inode)
383 * time_after32 - compare two 32-bit relative times
384 * @a: the time which may be after @b
385 * @b: the time which may be before @a
387 * Needed for kernels earlier than v4.14-rc1~134^2
389 * time_after32(a, b) returns true if the time @a is after time @b.
390 * time_before32(b, a) returns true if the time @b is before time @a.
392 * Similar to time_after(), compare two 32-bit timestamps for relative
393 * times. This is useful for comparing 32-bit seconds values that can't
394 * be converted to 64-bit values (e.g. due to disk format or wire protocol
395 * issues) when it is known that the times are less than 68 years apart.
397 #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
398 #define time_before32(b, a) time_after32(a, b)
403 #define smp_store_mb(var, value) set_mb(var, value)
406 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
407 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
409 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
410 return bi->interval_exp ? 1 << bi->interval_exp : 0;
411 #elif defined(HAVE_INTERVAL_BLK_INTEGRITY)
414 return bi->sector_size;
415 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
418 static inline const char *blk_integrity_name(struct blk_integrity *bi)
420 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
421 return bi->profile->name;
427 static inline unsigned int bip_size(struct bio_integrity_payload *bip)
429 #ifdef HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
430 return bip->bip_iter.bi_size;
432 return bip->bip_size;
435 #else /* !CONFIG_BLK_DEV_INTEGRITY */
436 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
440 static inline const char *blk_integrity_name(struct blk_integrity *bi)
442 /* gcc8 dislikes when strcmp() is called against NULL */
445 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
447 #ifndef INTEGRITY_FLAG_READ
448 #define INTEGRITY_FLAG_READ BLK_INTEGRITY_VERIFY
451 #ifndef INTEGRITY_FLAG_WRITE
452 #define INTEGRITY_FLAG_WRITE BLK_INTEGRITY_GENERATE
455 static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
457 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
458 struct blk_integrity *bi = bdev_get_integrity(bdev);
463 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
464 if (rw == 0 && bi->profile->verify_fn != NULL &&
465 (bi->flags & INTEGRITY_FLAG_READ))
468 if (rw == 1 && bi->profile->generate_fn != NULL &&
469 (bi->flags & INTEGRITY_FLAG_WRITE))
472 if (rw == 0 && bi->verify_fn != NULL &&
473 (bi->flags & INTEGRITY_FLAG_READ))
476 if (rw == 1 && bi->generate_fn != NULL &&
477 (bi->flags & INTEGRITY_FLAG_WRITE))
479 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
480 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
485 #ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
486 #define ll_pagevec_init(pvec, n) pagevec_init(pvec)
488 #define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
492 # define ll_d_count(d) d_count(d)
494 # define ll_d_count(d) ((d)->d_count)
495 #endif /* HAVE_D_COUNT */
497 #ifndef HAVE_IN_COMPAT_SYSCALL
498 #define in_compat_syscall is_compat_task
502 #define page_tree i_pages
503 #define ll_xa_lock_irqsave(lockp, flags) xa_lock_irqsave(lockp, flags)
504 #define ll_xa_unlock_irqrestore(lockp, flags) xa_unlock_irqrestore(lockp, flags)
505 #define ll_xa_lock(lockp) xa_lock(lockp)
506 #define ll_xa_unlock(lockp) xa_unlock(lockp)
508 #define i_pages tree_lock
509 #define ll_xa_lock_irqsave(lockp, flags) spin_lock_irqsave(lockp, flags)
510 #define ll_xa_unlock_irqrestore(lockp, flags) spin_unlock_irqrestore(lockp, flags)
511 #define ll_xa_lock(lockp) spin_lock(lockp)
512 #define ll_xa_unlock(lockp) spin_unlock(lockp)
515 #ifndef HAVE_LOCK_PAGE_MEMCG
516 #define lock_page_memcg(page) do {} while (0)
517 #define unlock_page_memcg(page) do {} while (0)
520 #ifndef KMEM_CACHE_USERCOPY
521 #define kmem_cache_create_usercopy(name, size, align, flags, useroffset, \
523 kmem_cache_create(name, size, align, flags, ctor)
526 #ifndef HAVE_LINUX_SELINUX_IS_ENABLED
527 #define selinux_is_enabled() 1
530 static inline int ll_vfs_getxattr(struct dentry *dentry, struct inode *inode,
532 void *value, size_t size)
534 #ifndef HAVE_VFS_SETXATTR
535 if (unlikely(!inode->i_op->getxattr))
538 return inode->i_op->getxattr(dentry, name, value, size);
540 return __vfs_getxattr(dentry, inode, name, value, size);
544 static inline int ll_vfs_setxattr(struct dentry *dentry, struct inode *inode,
546 const void *value, size_t size, int flags)
548 #ifndef HAVE_VFS_SETXATTR
549 if (unlikely(!inode->i_op->setxattr))
552 return inode->i_op->setxattr(dentry, name, value, size, flags);
554 return __vfs_setxattr(dentry, inode, name, value, size, flags);
558 static inline int ll_vfs_removexattr(struct dentry *dentry, struct inode *inode,
561 #ifndef HAVE_VFS_SETXATTR
562 if (unlikely(!inode->i_op->setxattr))
565 return inode->i_op->removexattr(dentry, name);
567 return __vfs_removexattr(dentry, name);
571 #ifndef FALLOC_FL_COLLAPSE_RANGE
572 #define FALLOC_FL_COLLAPSE_RANGE 0x08 /* remove a range of a file */
575 #ifndef FALLOC_FL_ZERO_RANGE
576 #define FALLOC_FL_ZERO_RANGE 0x10 /* convert range to zeros */
579 #ifndef FALLOC_FL_INSERT_RANGE
580 #define FALLOC_FL_INSERT_RANGE 0x20 /* insert space within file */
584 #define raw_cpu_ptr(p) __this_cpu_ptr(p)
587 #ifndef HAVE_IS_ROOT_INODE
588 static inline bool is_root_inode(struct inode *inode)
590 return inode == inode->i_sb->s_root->d_inode;
594 #ifndef HAVE_REGISTER_SHRINKER_RET
595 #define register_shrinker(_s) (register_shrinker(_s), 0)
598 static inline void ll_security_release_secctx(char *secdata, u32 seclen)
600 #ifdef HAVE_SEC_RELEASE_SECCTX_1ARG
601 struct lsmcontext context = { };
603 lsmcontext_init(&context, secdata, seclen, 0);
604 return security_release_secctx(&context);
606 return security_release_secctx(secdata, seclen);
610 #endif /* _LUSTRE_COMPAT_H */