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>
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)
74 #ifndef HAVE_DENTRY_D_CHILD
75 #define d_child d_u.d_child
78 #ifdef HAVE_DENTRY_D_U_D_ALIAS
79 #define d_alias d_u.d_alias
82 #ifndef HAVE_D_IN_LOOKUP
83 static inline int d_in_lookup(struct dentry *dentry)
89 #ifndef HAVE_VM_FAULT_T
90 #define vm_fault_t int
93 #ifndef HAVE_FOP_ITERATE_SHARED
94 #define iterate_shared iterate
97 #ifdef HAVE_OLDSIZE_TRUNCATE_PAGECACHE
98 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, 0, size)
100 #define ll_truncate_pagecache(inode, size) truncate_pagecache(inode, size)
103 #ifdef HAVE_VFS_RENAME_5ARGS
104 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL)
105 #elif defined HAVE_VFS_RENAME_6ARGS
106 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d, NULL, 0)
108 #define ll_vfs_rename(a, b, c, d) vfs_rename(a, b, c, d)
111 #ifdef HAVE_VFS_UNLINK_3ARGS
112 #define ll_vfs_unlink(a, b) vfs_unlink(a, b, NULL)
114 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
117 static inline int ll_vfs_getattr(struct path *path, struct kstat *st,
118 u32 request_mask, unsigned int flags)
122 #ifdef HAVE_INODEOPS_ENHANCED_GETATTR
123 rc = vfs_getattr(path, st, request_mask, flags);
125 rc = vfs_getattr(path, st);
130 #ifndef HAVE_D_IS_POSITIVE
131 static inline bool d_is_positive(const struct dentry *dentry)
133 return dentry->d_inode != NULL;
137 #ifndef HAVE_INODE_LOCK
138 # define inode_lock(inode) mutex_lock(&(inode)->i_mutex)
139 # define inode_unlock(inode) mutex_unlock(&(inode)->i_mutex)
140 # define inode_trylock(inode) mutex_trylock(&(inode)->i_mutex)
143 /* Old kernels lacked both Xarray support and the page cache
144 * using Xarrays. Our back ported Xarray support introduces
145 * the real xa_is_value() but we need a wrapper as well for
146 * the page cache interaction. Lets keep xa_is_value() separate
147 * in old kernels for Xarray support and page cache handling.
149 #ifndef HAVE_XARRAY_SUPPORT
150 static inline bool ll_xa_is_value(void *entry)
152 return radix_tree_exceptional_entry(entry);
155 #define ll_xa_is_value xa_is_value
158 #ifndef HAVE_TRUNCATE_INODE_PAGES_FINAL
159 static inline void truncate_inode_pages_final(struct address_space *map)
161 truncate_inode_pages(map, 0);
165 #ifndef HAVE_PTR_ERR_OR_ZERO
166 static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
175 #ifdef HAVE_PID_NS_FOR_CHILDREN
176 # define ll_task_pid_ns(task) \
177 ((task)->nsproxy ? ((task)->nsproxy->pid_ns_for_children) : NULL)
179 # define ll_task_pid_ns(task) \
180 ((task)->nsproxy ? ((task)->nsproxy->pid_ns) : NULL)
183 #ifdef HAVE_FULL_NAME_HASH_3ARGS
184 # define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
186 # define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
189 #ifdef HAVE_STRUCT_POSIX_ACL_XATTR
190 # define posix_acl_xattr_header struct posix_acl_xattr_header
191 # define posix_acl_xattr_entry struct posix_acl_xattr_entry
192 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
194 # define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
197 #ifdef HAVE_IOP_XATTR
198 #define ll_setxattr generic_setxattr
199 #define ll_getxattr generic_getxattr
200 #define ll_removexattr generic_removexattr
201 #endif /* HAVE_IOP_XATTR */
203 #ifndef HAVE_POSIX_ACL_VALID_USER_NS
204 #define posix_acl_valid(a,b) posix_acl_valid(b)
207 #ifdef HAVE_IOP_SET_ACL
208 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
209 #ifndef HAVE_POSIX_ACL_UPDATE_MODE
210 static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
211 struct posix_acl **acl)
213 umode_t mode = inode->i_mode;
216 error = posix_acl_equiv_mode(*acl, &mode);
221 if (!in_group_p(inode->i_gid) &&
222 !capable_wrt_inode_uidgid(inode, CAP_FSETID))
227 #endif /* HAVE_POSIX_ACL_UPDATE_MODE */
231 #ifndef HAVE_IOV_ITER_TRUNCATE
232 static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
234 if (i->count > count)
240 * mount MS_* flags split from superblock SB_* flags
241 * if the SB_* flags are not available use the MS_* flags
243 #if !defined(SB_RDONLY) && defined(MS_RDONLY)
244 # define SB_RDONLY MS_RDONLY
246 #if !defined(SB_ACTIVE) && defined(MS_ACTIVE)
247 # define SB_ACTIVE MS_ACTIVE
249 #if !defined(SB_NOSEC) && defined(MS_NOSEC)
250 # define SB_NOSEC MS_NOSEC
252 #if !defined(SB_POSIXACL) && defined(MS_POSIXACL)
253 # define SB_POSIXACL MS_POSIXACL
255 #if !defined(SB_NODIRATIME) && defined(MS_NODIRATIME)
256 # define SB_NODIRATIME MS_NODIRATIME
259 #ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
260 static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
265 static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
267 return (struct iovec) {
268 .iov_base = iter->iov->iov_base + iter->iov_offset,
269 .iov_len = min(iter->count,
270 iter->iov->iov_len - iter->iov_offset),
274 #define iov_for_each(iov, iter, start) \
275 for (iter = (start); \
276 (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
277 iov_iter_advance(&(iter), (iov).iov_len))
279 static inline ssize_t
280 generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
286 iov_for_each(iov, i, *iter) {
289 res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
297 if (res < iov.iov_len)
302 iov_iter_advance(iter, bytes);
306 static inline ssize_t
307 __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
313 /* Since LLITE updates file size at the end of I/O in
314 * vvp_io_commit_write(), append write has to be done in atomic when
315 * there are multiple segments because otherwise each iteration to
316 * __generic_file_aio_write() will see original file size */
317 if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
318 struct iovec *iov_copy;
321 OBD_ALLOC_PTR_ARRAY(iov_copy, iter->nr_segs);
325 iov_for_each(iov, i, *iter)
326 iov_copy[count++] = iov;
328 bytes = __generic_file_aio_write(iocb, iov_copy, count,
330 OBD_FREE_PTR_ARRAY(iov_copy, iter->nr_segs);
333 iov_iter_advance(iter, bytes);
337 iov_for_each(iov, i, *iter) {
340 res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
348 if (res < iov.iov_len)
353 iov_iter_advance(iter, bytes);
356 #endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
358 static inline void __user *get_vmf_address(struct vm_fault *vmf)
360 #ifdef HAVE_VM_FAULT_ADDRESS
361 return (void __user *)vmf->address;
363 return vmf->virtual_address;
367 #ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
368 # define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
370 # define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
373 #ifndef HAVE_CURRENT_TIME
374 static inline struct timespec current_time(struct inode *inode)
382 * time_after32 - compare two 32-bit relative times
383 * @a: the time which may be after @b
384 * @b: the time which may be before @a
386 * Needed for kernels earlier than v4.14-rc1~134^2
388 * time_after32(a, b) returns true if the time @a is after time @b.
389 * time_before32(b, a) returns true if the time @b is before time @a.
391 * Similar to time_after(), compare two 32-bit timestamps for relative
392 * times. This is useful for comparing 32-bit seconds values that can't
393 * be converted to 64-bit values (e.g. due to disk format or wire protocol
394 * issues) when it is known that the times are less than 68 years apart.
396 #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
397 #define time_before32(b, a) time_after32(a, b)
402 #define smp_store_mb(var, value) set_mb(var, value)
405 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
406 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
408 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
409 return bi->interval_exp ? 1 << bi->interval_exp : 0;
410 #elif defined(HAVE_INTERVAL_BLK_INTEGRITY)
413 return bi->sector_size;
414 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
417 static inline const char *blk_integrity_name(struct blk_integrity *bi)
419 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
420 return bi->profile->name;
426 static inline unsigned int bip_size(struct bio_integrity_payload *bip)
428 #ifdef HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
429 return bip->bip_iter.bi_size;
431 return bip->bip_size;
434 #else /* !CONFIG_BLK_DEV_INTEGRITY */
435 static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
439 static inline const char *blk_integrity_name(struct blk_integrity *bi)
441 /* gcc8 dislikes when strcmp() is called against NULL */
444 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
446 #ifndef INTEGRITY_FLAG_READ
447 #define INTEGRITY_FLAG_READ BLK_INTEGRITY_VERIFY
450 #ifndef INTEGRITY_FLAG_WRITE
451 #define INTEGRITY_FLAG_WRITE BLK_INTEGRITY_GENERATE
454 static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
456 #if IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)
457 struct blk_integrity *bi = bdev_get_integrity(bdev);
462 #ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
463 if (rw == 0 && bi->profile->verify_fn != NULL &&
464 (bi->flags & INTEGRITY_FLAG_READ))
467 if (rw == 1 && bi->profile->generate_fn != NULL &&
468 (bi->flags & INTEGRITY_FLAG_WRITE))
471 if (rw == 0 && bi->verify_fn != NULL &&
472 (bi->flags & INTEGRITY_FLAG_READ))
475 if (rw == 1 && bi->generate_fn != NULL &&
476 (bi->flags & INTEGRITY_FLAG_WRITE))
478 #endif /* !HAVE_INTERVAL_EXP_BLK_INTEGRITY */
479 #endif /* !CONFIG_BLK_DEV_INTEGRITY */
484 #ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
485 #define ll_pagevec_init(pvec, n) pagevec_init(pvec)
487 #define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
491 # define ll_d_count(d) d_count(d)
493 # define ll_d_count(d) ((d)->d_count)
494 #endif /* HAVE_D_COUNT */
496 #ifndef HAVE_IN_COMPAT_SYSCALL
497 #define in_compat_syscall is_compat_task
501 #define page_tree i_pages
502 #define ll_xa_lock_irqsave(lockp, flags) xa_lock_irqsave(lockp, flags)
503 #define ll_xa_unlock_irqrestore(lockp, flags) xa_unlock_irqrestore(lockp, flags)
505 #define i_pages tree_lock
506 #define ll_xa_lock_irqsave(lockp, flags) spin_lock_irqsave(lockp, flags)
507 #define ll_xa_unlock_irqrestore(lockp, flags) spin_unlock_irqrestore(lockp, flags)
510 #ifndef HAVE_LOCK_PAGE_MEMCG
511 #define lock_page_memcg(page) do {} while (0)
512 #define unlock_page_memcg(page) do {} while (0)
515 #ifndef KMEM_CACHE_USERCOPY
516 #define kmem_cache_create_usercopy(name, size, align, flags, useroffset, \
518 kmem_cache_create(name, size, align, flags, ctor)
521 #ifndef HAVE_LINUX_SELINUX_IS_ENABLED
522 #define selinux_is_enabled() 1
525 static inline int ll_vfs_getxattr(struct dentry *dentry, struct inode *inode,
527 void *value, size_t size)
529 #ifndef HAVE_VFS_SETXATTR
530 if (unlikely(!inode->i_op->getxattr))
533 return inode->i_op->getxattr(dentry, name, value, size);
535 return __vfs_getxattr(dentry, inode, name, value, size);
539 static inline int ll_vfs_setxattr(struct dentry *dentry, struct inode *inode,
541 const void *value, size_t size, int flags)
543 #ifndef HAVE_VFS_SETXATTR
544 if (unlikely(!inode->i_op->setxattr))
547 return inode->i_op->setxattr(dentry, name, value, size, flags);
549 return __vfs_setxattr(dentry, inode, name, value, size, flags);
553 static inline int ll_vfs_removexattr(struct dentry *dentry, struct inode *inode,
556 #ifndef HAVE_VFS_SETXATTR
557 if (unlikely(!inode->i_op->setxattr))
560 return inode->i_op->removexattr(dentry, name);
562 return __vfs_removexattr(dentry, name);
566 #ifndef FALLOC_FL_COLLAPSE_RANGE
567 #define FALLOC_FL_COLLAPSE_RANGE 0x08 /* remove a range of a file */
570 #ifndef FALLOC_FL_ZERO_RANGE
571 #define FALLOC_FL_ZERO_RANGE 0x10 /* convert range to zeros */
574 #ifndef FALLOC_FL_INSERT_RANGE
575 #define FALLOC_FL_INSERT_RANGE 0x20 /* insert space within file */
579 #define raw_cpu_ptr(p) __this_cpu_ptr(p)
582 #ifndef HAVE_IS_ROOT_INODE
583 static inline bool is_root_inode(struct inode *inode)
585 return inode == inode->i_sb->s_root->d_inode;
589 #ifndef HAVE_REGISTER_SHRINKER_RET
590 #define register_shrinker(_s) (register_shrinker(_s), 0)
593 #endif /* _LUSTRE_COMPAT_H */