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>
46 #include <libcfs/linux/linux-fs.h>
47 #include <obd_support.h>
49 #ifdef HAVE_4ARGS_VFS_SYMLINK
50 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
51 vfs_symlink(dir, dentry, path, mode)
53 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
54 vfs_symlink(dir, dentry, path)
58 #define bio_idx(bio) (bio->bi_iter.bi_idx)
59 #define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
60 #define bvl_to_page(bvl) (bvl->bv_page)
62 #define bio_idx(bio) (bio->bi_idx)
63 #define bio_set_sector(bio, sector) (bio->bi_sector = sector)
64 #define bio_sectors(bio) ((bio)->bi_size >> 9)
65 #define bvl_to_page(bvl) (bvl->bv_page)
69 #define bio_start_sector(bio) (bio->bi_iter.bi_sector)
71 #define bio_start_sector(bio) (bio->bi_sector)
75 # define bio_get_dev(bio) ((bio)->bi_bdev)
76 # define bio_get_disk(bio) (bio_get_dev(bio)->bd_disk)
77 # define bio_get_queue(bio) bdev_get_queue(bio_get_dev(bio))
79 # ifndef HAVE_BIO_SET_DEV
80 # define bio_set_dev(bio, bdev) (bio_get_dev(bio) = (bdev))
83 # define bio_get_disk(bio) ((bio)->bi_disk)
84 # define bio_get_queue(bio) (bio_get_disk(bio)->queue)
91 static inline struct bio *cfs_bio_alloc(struct block_device *bdev,
92 unsigned short nr_vecs,
93 __u32 op, gfp_t gfp_mask)
96 #ifdef HAVE_BIO_ALLOC_WITH_BDEV
97 bio = bio_alloc(bdev, nr_vecs, op, gfp_mask);
99 bio = bio_alloc(gfp_mask, nr_vecs);
101 bio_set_dev(bio, bdev);
104 #endif /* HAVE_BIO_ALLOC_WITH_BDEV */
108 #ifndef HAVE_DENTRY_D_CHILD
109 #define d_child d_u.d_child
112 #ifndef HAVE_D_IN_LOOKUP
113 static inline int d_in_lookup(struct dentry *dentry)
119 #ifndef HAVE_VM_FAULT_T
120 #define vm_fault_t int
123 #ifndef HAVE_FOP_ITERATE_SHARED
124 #define iterate_shared iterate
127 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
128 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
130 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
133 #ifdef HAVE_VFS_RENAME_5ARGS
134 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
135 #elif defined HAVE_VFS_RENAME_6ARGS
136 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
138 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
141 #ifdef HAVE_USER_NAMESPACE_ARG
142 #define vfs_unlink(ns, dir, de) vfs_unlink(ns, dir, de, NULL)
143 #elif defined HAVE_VFS_UNLINK_3ARGS
144 #define vfs_unlink(ns, dir, de) vfs_unlink(dir, de, NULL)
146 #define vfs_unlink(ns, dir, de) vfs_unlink(dir, de)
149 static inline int ll_vfs_getattr(struct path *path, struct kstat *st,
150 u32 request_mask, unsigned int flags)
154 #if defined(HAVE_USER_NAMESPACE_ARG) || defined(HAVE_INODEOPS_ENHANCED_GETATTR)
155 rc = vfs_getattr(path, st, request_mask, flags);
157 rc = vfs_getattr(path, st);
162 #ifndef HAVE_D_IS_POSITIVE
163 static inline bool d_is_positive(const struct dentry *dentry)
165 return dentry->d_inode != NULL;
169 #ifndef HAVE_INODE_LOCK
170 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
171 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
172 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
175 /* Old kernels lacked both Xarray support and the page cache
176 * using Xarrays. Our back ported Xarray support introduces
177 * the real xa_is_value() but we need a wrapper as well for
178 * the page cache interaction. Lets keep xa_is_value() separate
179 * in old kernels for Xarray support and page cache handling.
181 #ifndef HAVE_XARRAY_SUPPORT
182 static inline bool ll_xa_is_value(void *entry)
184 return radix_tree_exceptional_entry(entry);
187 #define ll_xa_is_value xa_is_value
190 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
191 static inline void truncate_inode_pages_final(struct address_space *map)
193 truncate_inode_pages(map, 0);
197 #ifndef HAVE_PTR_ERR_OR_ZERO
198 static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
207 #ifdef HAVE_PID_NS_FOR_CHILDREN
208 # define ll_task_pid_ns(task) \
209 ((task)->nsproxy ? ((task)->nsproxy->pid_ns_for_children) : NULL)
211 # define ll_task_pid_ns(task) \
212 ((task)->nsproxy ? ((task)->nsproxy->pid_ns) : NULL)
215 #ifdef HAVE_FULL_NAME_HASH_3ARGS
216 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
218 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
221 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
222 # define posix_acl_xattr_header struct posix_acl_xattr_header
223 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
224 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
226 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
229 #ifdef HAVE_IOP_XATTR
230 #define ll_setxattr generic_setxattr
231 #define ll_getxattr generic_getxattr
232 #define ll_removexattr generic_removexattr
233 #endif /* HAVE_IOP_XATTR */
235 #ifndef HAVE_POSIX_ACL_VALID_USER_NS
236 #define posix_acl_valid(a,b) posix_acl_valid(b)
239 #ifdef HAVE_IOP_SET_ACL
240 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
241 #if !defined(HAVE_USER_NAMESPACE_ARG) && !defined(HAVE_POSIX_ACL_UPDATE_MODE)
242 static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
243 struct posix_acl **acl)
245 umode_t mode = inode->i_mode;
248 error = posix_acl_equiv_mode(*acl, &mode);
253 if (!in_group_p(inode->i_gid) &&
254 !capable_wrt_inode_uidgid(inode, CAP_FSETID))
259 #endif /* HAVE_POSIX_ACL_UPDATE_MODE */
263 #ifndef HAVE_IOV_ITER_TRUNCATE
264 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
266 if (i->count > count)
272 * mount MS_* flags split from superblock SB_* flags
273 * if the SB_* flags are not available use the MS_* flags
275 #if !defined(SB_RDONLY) && defined(MS_RDONLY)
276 # define SB_RDONLY MS_RDONLY
278 #if !defined(SB_ACTIVE) && defined(MS_ACTIVE)
279 # define SB_ACTIVE MS_ACTIVE
281 #if !defined(SB_NOSEC) && defined(MS_NOSEC)
282 # define SB_NOSEC MS_NOSEC
284 #if !defined(SB_POSIXACL) && defined(MS_POSIXACL)
285 # define SB_POSIXACL MS_POSIXACL
287 #if !defined(SB_NODIRATIME) && defined(MS_NODIRATIME)
288 # define SB_NODIRATIME MS_NODIRATIME
291 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
292 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
297 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
299 return (struct iovec) {
300 .iov_base = iter->iov->iov_base + iter->iov_offset,
301 .iov_len = min(iter->count,
302 iter->iov->iov_len - iter->iov_offset),
306 #define iov_for_each(iov, iter, start) \
307 for (iter = (start); \
308 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
309 iov_iter_advance(&(iter), (iov).iov_len))
311 static inline ssize_t
312 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
318 iov_for_each(iov, i, *iter) {
321 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
329 if (res < iov.iov_len)
334 iov_iter_advance(iter, bytes);
338 static inline ssize_t
339 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
345 /* Since LLITE updates file size at the end of I/O in
346 * vvp_io_commit_write(), append write has to be done in atomic when
347 * there are multiple segments because otherwise each iteration to
348 * __generic_file_aio_write() will see original file size */
349 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
350 struct iovec *iov_copy;
353 OBD_ALLOC_PTR_ARRAY(iov_copy, iter->nr_segs);
357 iov_for_each(iov, i, *iter)
358 iov_copy[count++] = iov;
360 bytes = __generic_file_aio_write(iocb, iov_copy, count,
362 OBD_FREE_PTR_ARRAY(iov_copy, iter->nr_segs);
365 iov_iter_advance(iter, bytes);
369 iov_for_each(iov, i, *iter) {
372 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
380 if (res < iov.iov_len)
385 iov_iter_advance(iter, bytes);
388 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
390 static inline void __user *get_vmf_address(struct vm_fault *vmf)
392 #ifdef HAVE_VM_FAULT_ADDRESS
393 return (void __user *)vmf->address;
395 return vmf->virtual_address;
399 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
400 # define __ll_filemap_fault(vma, vmf) filemap_fault(vmf)
402 # define __ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
405 #ifndef HAVE_CURRENT_TIME
406 static inline struct timespec current_time(struct inode *inode)
414 * time_after32 - compare two 32-bit relative times
415 * @a: the time which may be after @b
416 * @b: the time which may be before @a
418 * Needed for kernels earlier than v4.14-rc1~134^2
420 * time_after32(a, b) returns true if the time @a is after time @b.
421 * time_before32(b, a) returns true if the time @b is before time @a.
423 * Similar to time_after(), compare two 32-bit timestamps for relative
424 * times. This is useful for comparing 32-bit seconds values that can't
425 * be converted to 64-bit values (e.g. due to disk format or wire protocol
426 * issues) when it is known that the times are less than 68 years apart.
428 #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
429 #define time_before32(b, a) time_after32(a, b)
434 #define smp_store_mb(var, value) set_mb(var, value)
437 #ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
438 #define ll_pagevec_init(pvec, n) pagevec_init(pvec)
440 #define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
444 # define ll_d_count(d) d_count(d)
446 # define ll_d_count(d) ((d)->d_count)
447 #endif /* HAVE_D_COUNT */
449 #ifndef HAVE_IN_COMPAT_SYSCALL
450 #define in_compat_syscall is_compat_task
454 #define page_tree i_pages
455 #define ll_xa_lock_irqsave(lockp, flags) xa_lock_irqsave(lockp, flags)
456 #define ll_xa_unlock_irqrestore(lockp, flags) xa_unlock_irqrestore(lockp, flags)
458 #define i_pages tree_lock
459 #define ll_xa_lock_irqsave(lockp, flags) spin_lock_irqsave(lockp, flags)
460 #define ll_xa_unlock_irqrestore(lockp, flags) spin_unlock_irqrestore(lockp, flags)
463 /* Linux commit v5.15-12273-gab2f9d2d3626
464 * mm: unexport {,un}lock_page_memcg
466 * Note that the functions are still defined or declared breaking
467 * the simple approach of just defining the missing functions here
469 #ifdef HAVE_LOCK_PAGE_MEMCG
470 #define vvp_lock_page_memcg(page) lock_page_memcg((page))
471 #define vvp_unlock_page_memcg(page) unlock_page_memcg((page))
473 #define vvp_lock_page_memcg(page)
474 #define vvp_unlock_page_memcg(page)
477 #ifndef KMEM_CACHE_USERCOPY
478 #define kmem_cache_create_usercopy(name, size, align, flags, useroffset, \
480 kmem_cache_create(name, size, align, flags, ctor)
483 static inline bool ll_security_xattr_wanted(struct inode *in)
485 #ifdef CONFIG_SECURITY
486 return in->i_security && in->i_sb->s_security;
492 static inline int ll_vfs_getxattr(struct dentry *dentry, struct inode *inode,
494 void *value, size_t size)
496 #ifdef HAVE_USER_NAMESPACE_ARG
497 return vfs_getxattr(&init_user_ns, dentry, name, value, size);
498 #elif defined(HAVE_VFS_SETXATTR)
499 return __vfs_getxattr(dentry, inode, name, value, size);
501 if (unlikely(!inode->i_op->getxattr))
504 return inode->i_op->getxattr(dentry, name, value, size);
508 static inline int ll_vfs_setxattr(struct dentry *dentry, struct inode *inode,
510 const void *value, size_t size, int flags)
512 #ifdef HAVE_USER_NAMESPACE_ARG
513 return vfs_setxattr(&init_user_ns, dentry, name, value, size, flags);
514 #elif defined(HAVE_VFS_SETXATTR)
515 return __vfs_setxattr(dentry, inode, name, value, size, flags);
517 if (unlikely(!inode->i_op->setxattr))
520 return inode->i_op->setxattr(dentry, name, value, size, flags);
524 static inline int ll_vfs_removexattr(struct dentry *dentry, struct inode *inode,
527 #ifdef HAVE_USER_NAMESPACE_ARG
528 return vfs_removexattr(&init_user_ns, dentry, name);
529 #elif defined(HAVE_VFS_SETXATTR)
530 return __vfs_removexattr(dentry, name);
532 if (unlikely(!inode->i_op->setxattr))
535 return inode->i_op->removexattr(dentry, name);
539 #ifndef FALLOC_FL_COLLAPSE_RANGE
540 #define FALLOC_FL_COLLAPSE_RANGE 0x08 /* remove a range of a file */
543 #ifndef FALLOC_FL_ZERO_RANGE
544 #define FALLOC_FL_ZERO_RANGE 0x10 /* convert range to zeros */
547 #ifndef FALLOC_FL_INSERT_RANGE
548 #define FALLOC_FL_INSERT_RANGE 0x20 /* insert space within file */
552 #define raw_cpu_ptr(p) __this_cpu_ptr(p)
555 #ifndef HAVE_IS_ROOT_INODE
556 static inline bool is_root_inode(struct inode *inode)
558 return inode == inode->i_sb->s_root->d_inode;
562 #ifndef HAVE_REGISTER_SHRINKER_RET
563 #define register_shrinker(_s) (register_shrinker(_s), 0)
567 # if defined(__GNUC__) && __GNUC__ >= 7
568 # define fallthrough __attribute__((fallthrough)) /* fallthrough */
570 # define fallthrough do {} while (0) /* fallthrough */
574 static inline void ll_security_release_secctx(char *secdata, u32 seclen)
576 #ifdef HAVE_SEC_RELEASE_SECCTX_1ARG
577 struct lsmcontext context = { };
579 lsmcontext_init(&context, secdata, seclen, 0);
580 return security_release_secctx(&context);
582 return security_release_secctx(secdata, seclen);
586 #ifndef HAVE_USER_NAMESPACE_ARG
587 #define posix_acl_update_mode(ns, inode, mode, acl) \
588 posix_acl_update_mode(inode, mode, acl)
589 #define notify_change(ns, de, attr, inode) notify_change(de, attr, inode)
590 #define inode_owner_or_capable(ns, inode) inode_owner_or_capable(inode)
591 #define vfs_create(ns, dir, de, mode, ex) vfs_create(dir, de, mode, ex)
592 #define vfs_mkdir(ns, dir, de, mode) vfs_mkdir(dir, de, mode)
593 #define ll_set_acl(ns, inode, acl, type) ll_set_acl(inode, acl, type)
597 * delete_from_page_cache is not exported anymore
599 #ifdef HAVE_DELETE_FROM_PAGE_CACHE
600 #define cfs_delete_from_page_cache(page) delete_from_page_cache((page))
602 static inline void cfs_delete_from_page_cache(struct page *page)
606 LASSERT(PageLocked(page));
609 /* on entry page is locked */
610 if (S_ISREG(page->mapping->host->i_mode)) {
611 generic_error_remove_page(page->mapping, page);
613 loff_t lstart = page->index << PAGE_SHIFT;
614 loff_t lend = lstart + PAGE_SIZE - 1;
616 truncate_inode_pages_range(page->mapping, lstart, lend);
623 #endif /* _LUSTRE_COMPAT_H */