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_USER_NAMESPACE_ARG
113 #define vfs_unlink(ns, dir, de) vfs_unlink(ns, dir, de, NULL)
114 #elif defined HAVE_VFS_UNLINK_3ARGS
115 #define vfs_unlink(ns, dir, de) vfs_unlink(dir, de, NULL)
117 #define vfs_unlink(ns, dir, de) vfs_unlink(dir, de)
120 static inline int ll_vfs_getattr(struct path *path, struct kstat *st,
121 u32 request_mask, unsigned int flags)
125 #if defined(HAVE_USER_NAMESPACE_ARG) || defined(HAVE_INODEOPS_ENHANCED_GETATTR)
126 rc = vfs_getattr(path, st, request_mask, flags);
128 rc = vfs_getattr(path, st);
133 #ifndef HAVE_D_IS_POSITIVE
134 static inline bool d_is_positive(const struct dentry *dentry)
136 return dentry->d_inode != NULL;
140 #ifndef HAVE_INODE_LOCK
141 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
142 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
143 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
146 /* Old kernels lacked both Xarray support and the page cache
147 * using Xarrays. Our back ported Xarray support introduces
148 * the real xa_is_value() but we need a wrapper as well for
149 * the page cache interaction. Lets keep xa_is_value() separate
150 * in old kernels for Xarray support and page cache handling.
152 #ifndef HAVE_XARRAY_SUPPORT
153 static inline bool ll_xa_is_value(void *entry)
155 return radix_tree_exceptional_entry(entry);
158 #define ll_xa_is_value xa_is_value
161 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
162 static inline void truncate_inode_pages_final(struct address_space *map)
164 truncate_inode_pages(map, 0);
168 #ifndef HAVE_PTR_ERR_OR_ZERO
169 static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
178 #ifdef HAVE_PID_NS_FOR_CHILDREN
179 # define ll_task_pid_ns(task) \
180 ((task)->nsproxy ? ((task)->nsproxy->pid_ns_for_children) : NULL)
182 # define ll_task_pid_ns(task) \
183 ((task)->nsproxy ? ((task)->nsproxy->pid_ns) : NULL)
186 #ifdef HAVE_FULL_NAME_HASH_3ARGS
187 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
189 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
192 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
193 # define posix_acl_xattr_header struct posix_acl_xattr_header
194 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
195 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
197 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
200 #ifdef HAVE_IOP_XATTR
201 #define ll_setxattr generic_setxattr
202 #define ll_getxattr generic_getxattr
203 #define ll_removexattr generic_removexattr
204 #endif /* HAVE_IOP_XATTR */
206 #ifndef HAVE_POSIX_ACL_VALID_USER_NS
207 #define posix_acl_valid(a,b) posix_acl_valid(b)
210 #ifdef HAVE_IOP_SET_ACL
211 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
212 #if !defined(HAVE_USER_NAMESPACE_ARG) && !defined(HAVE_POSIX_ACL_UPDATE_MODE)
213 static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
214 struct posix_acl **acl)
216 umode_t mode = inode->i_mode;
219 error = posix_acl_equiv_mode(*acl, &mode);
224 if (!in_group_p(inode->i_gid) &&
225 !capable_wrt_inode_uidgid(inode, CAP_FSETID))
230 #endif /* HAVE_POSIX_ACL_UPDATE_MODE */
234 #ifndef HAVE_IOV_ITER_TRUNCATE
235 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
237 if (i->count > count)
243 * mount MS_* flags split from superblock SB_* flags
244 * if the SB_* flags are not available use the MS_* flags
246 #if !defined(SB_RDONLY) && defined(MS_RDONLY)
247 # define SB_RDONLY MS_RDONLY
249 #if !defined(SB_ACTIVE) && defined(MS_ACTIVE)
250 # define SB_ACTIVE MS_ACTIVE
252 #if !defined(SB_NOSEC) && defined(MS_NOSEC)
253 # define SB_NOSEC MS_NOSEC
255 #if !defined(SB_POSIXACL) && defined(MS_POSIXACL)
256 # define SB_POSIXACL MS_POSIXACL
258 #if !defined(SB_NODIRATIME) && defined(MS_NODIRATIME)
259 # define SB_NODIRATIME MS_NODIRATIME
262 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
263 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
268 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
270 return (struct iovec) {
271 .iov_base = iter->iov->iov_base + iter->iov_offset,
272 .iov_len = min(iter->count,
273 iter->iov->iov_len - iter->iov_offset),
277 #define iov_for_each(iov, iter, start) \
278 for (iter = (start); \
279 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
280 iov_iter_advance(&(iter), (iov).iov_len))
282 static inline ssize_t
283 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
289 iov_for_each(iov, i, *iter) {
292 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
300 if (res < iov.iov_len)
305 iov_iter_advance(iter, bytes);
309 static inline ssize_t
310 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
316 /* Since LLITE updates file size at the end of I/O in
317 * vvp_io_commit_write(), append write has to be done in atomic when
318 * there are multiple segments because otherwise each iteration to
319 * __generic_file_aio_write() will see original file size */
320 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
321 struct iovec *iov_copy;
324 OBD_ALLOC_PTR_ARRAY(iov_copy, iter->nr_segs);
328 iov_for_each(iov, i, *iter)
329 iov_copy[count++] = iov;
331 bytes = __generic_file_aio_write(iocb, iov_copy, count,
333 OBD_FREE_PTR_ARRAY(iov_copy, iter->nr_segs);
336 iov_iter_advance(iter, bytes);
340 iov_for_each(iov, i, *iter) {
343 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
351 if (res < iov.iov_len)
356 iov_iter_advance(iter, bytes);
359 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
361 static inline void __user *get_vmf_address(struct vm_fault *vmf)
363 #ifdef HAVE_VM_FAULT_ADDRESS
364 return (void __user *)vmf->address;
366 return vmf->virtual_address;
370 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
371 # define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
373 # define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
376 #ifndef HAVE_CURRENT_TIME
377 static inline struct timespec current_time(struct inode *inode)
385 * time_after32 - compare two 32-bit relative times
386 * @a: the time which may be after @b
387 * @b: the time which may be before @a
389 * Needed for kernels earlier than v4.14-rc1~134^2
391 * time_after32(a, b) returns true if the time @a is after time @b.
392 * time_before32(b, a) returns true if the time @b is before time @a.
394 * Similar to time_after(), compare two 32-bit timestamps for relative
395 * times. This is useful for comparing 32-bit seconds values that can't
396 * be converted to 64-bit values (e.g. due to disk format or wire protocol
397 * issues) when it is known that the times are less than 68 years apart.
399 #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
400 #define time_before32(b, a) time_after32(a, b)
405 #define smp_store_mb(var, value) set_mb(var, value)
408 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
409 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
411 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
412 return bi->interval_exp ? 1 << bi->interval_exp : 0;
413 #elif defined(HAVE_INTERVAL_BLK_INTEGRITY)
416 return bi->sector_size;
417 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
420 static inline const char *blk_integrity_name(struct blk_integrity *bi)
422 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
423 return bi->profile->name;
429 static inline unsigned int bip_size(struct bio_integrity_payload *bip)
431 #ifdef HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
432 return bip->bip_iter.bi_size;
434 return bip->bip_size;
437 #else /* !CONFIG_BLK_DEV_INTEGRITY */
438 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
442 static inline const char *blk_integrity_name(struct blk_integrity *bi)
444 /* gcc8 dislikes when strcmp() is called against NULL */
447 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
449 #ifndef INTEGRITY_FLAG_READ
450 #define INTEGRITY_FLAG_READ BLK_INTEGRITY_VERIFY
453 #ifndef INTEGRITY_FLAG_WRITE
454 #define INTEGRITY_FLAG_WRITE BLK_INTEGRITY_GENERATE
457 static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
459 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
460 struct blk_integrity *bi = bdev_get_integrity(bdev);
465 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
466 if (rw == 0 && bi->profile->verify_fn != NULL &&
467 (bi->flags & INTEGRITY_FLAG_READ))
470 if (rw == 1 && bi->profile->generate_fn != NULL &&
471 (bi->flags & INTEGRITY_FLAG_WRITE))
474 if (rw == 0 && bi->verify_fn != NULL &&
475 (bi->flags & INTEGRITY_FLAG_READ))
478 if (rw == 1 && bi->generate_fn != NULL &&
479 (bi->flags & INTEGRITY_FLAG_WRITE))
481 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
482 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
487 #ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
488 #define ll_pagevec_init(pvec, n) pagevec_init(pvec)
490 #define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
494 # define ll_d_count(d) d_count(d)
496 # define ll_d_count(d) ((d)->d_count)
497 #endif /* HAVE_D_COUNT */
499 #ifndef HAVE_IN_COMPAT_SYSCALL
500 #define in_compat_syscall is_compat_task
504 #define page_tree i_pages
505 #define ll_xa_lock_irqsave(lockp, flags) xa_lock_irqsave(lockp, flags)
506 #define ll_xa_unlock_irqrestore(lockp, flags) xa_unlock_irqrestore(lockp, flags)
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)
513 #ifndef HAVE_LOCK_PAGE_MEMCG
514 #define lock_page_memcg(page) do {} while (0)
515 #define unlock_page_memcg(page) do {} while (0)
518 #ifndef KMEM_CACHE_USERCOPY
519 #define kmem_cache_create_usercopy(name, size, align, flags, useroffset, \
521 kmem_cache_create(name, size, align, flags, ctor)
524 #ifndef HAVE_LINUX_SELINUX_IS_ENABLED
525 #define selinux_is_enabled() 1
528 static inline int ll_vfs_getxattr(struct dentry *dentry, struct inode *inode,
530 void *value, size_t size)
532 #ifdef HAVE_USER_NAMESPACE_ARG
533 return vfs_getxattr(&init_user_ns, dentry, name, value, size);
534 #elif defined(HAVE_VFS_SETXATTR)
535 return __vfs_getxattr(dentry, inode, name, value, size);
537 if (unlikely(!inode->i_op->getxattr))
540 return inode->i_op->getxattr(dentry, 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 #ifdef HAVE_USER_NAMESPACE_ARG
549 return vfs_setxattr(&init_user_ns, dentry, name, value, size, flags);
550 #elif defined(HAVE_VFS_SETXATTR)
551 return __vfs_setxattr(dentry, inode, name, value, size, flags);
553 if (unlikely(!inode->i_op->setxattr))
556 return inode->i_op->setxattr(dentry, name, value, size, flags);
560 static inline int ll_vfs_removexattr(struct dentry *dentry, struct inode *inode,
563 #ifdef HAVE_USER_NAMESPACE_ARG
564 return vfs_removexattr(&init_user_ns, dentry, name);
565 #elif defined(HAVE_VFS_SETXATTR)
566 return __vfs_removexattr(dentry, name);
568 if (unlikely(!inode->i_op->setxattr))
571 return inode->i_op->removexattr(dentry, name);
575 #ifndef FALLOC_FL_COLLAPSE_RANGE
576 #define FALLOC_FL_COLLAPSE_RANGE 0x08 /* remove a range of a file */
579 #ifndef FALLOC_FL_ZERO_RANGE
580 #define FALLOC_FL_ZERO_RANGE 0x10 /* convert range to zeros */
583 #ifndef FALLOC_FL_INSERT_RANGE
584 #define FALLOC_FL_INSERT_RANGE 0x20 /* insert space within file */
588 #define raw_cpu_ptr(p) __this_cpu_ptr(p)
591 #ifndef HAVE_IS_ROOT_INODE
592 static inline bool is_root_inode(struct inode *inode)
594 return inode == inode->i_sb->s_root->d_inode;
598 #ifndef HAVE_REGISTER_SHRINKER_RET
599 #define register_shrinker(_s) (register_shrinker(_s), 0)
603 #define fallthrough do {} while (0) /* fallthrough */
606 static inline void ll_security_release_secctx(char *secdata, u32 seclen)
608 #ifdef HAVE_SEC_RELEASE_SECCTX_1ARG
609 struct lsmcontext context = { };
611 lsmcontext_init(&context, secdata, seclen, 0);
612 return security_release_secctx(&context);
614 return security_release_secctx(secdata, seclen);
618 #ifndef HAVE_USER_NAMESPACE_ARG
619 #define posix_acl_update_mode(ns, inode, mode, acl) \
620 posix_acl_update_mode(inode, mode, acl)
621 #define notify_change(ns, de, attr, inode) notify_change(de, attr, inode)
622 #define inode_owner_or_capable(ns, inode) inode_owner_or_capable(inode)
623 #define vfs_create(ns, dir, de, mode, ex) vfs_create(dir, de, mode, ex)
624 #define vfs_mkdir(ns, dir, de, mode) vfs_mkdir(dir, de, mode)
625 #define ll_set_acl(ns, inode, acl, type) ll_set_acl(inode, acl, type)
628 #endif /* _LUSTRE_COMPAT_H */