| /* |
| * SPDX-License-Identifier: BSD-2-Clause-FreeBSD |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _SYS_CCOMPAT_H |
| #define _SYS_CCOMPAT_H |
| |
| #if __FreeBSD_version < 1300051 |
| #define vm_page_valid(m) (m)->valid = VM_PAGE_BITS_ALL |
| #define vm_page_do_sunbusy(m) |
| #define vm_page_none_valid(m) ((m)->valid == 0) |
| #else |
| #define vm_page_do_sunbusy(m) vm_page_sunbusy(m) |
| #endif |
| |
| #if __FreeBSD_version < 1300074 |
| #define VOP_UNLOCK1(x) VOP_UNLOCK(x, 0) |
| #else |
| #define VOP_UNLOCK1(x) VOP_UNLOCK(x) |
| #endif |
| |
| #if __FreeBSD_version < 1300064 |
| #define VN_IS_DOOMED(vp) ((vp)->v_iflag & VI_DOOMED) |
| #endif |
| |
| #if __FreeBSD_version < 1300068 |
| #define VFS_VOP_VECTOR_REGISTER(x) |
| #endif |
| |
| #if __FreeBSD_version >= 1300076 |
| #define getnewvnode_reserve_() getnewvnode_reserve() |
| #else |
| #define getnewvnode_reserve_() getnewvnode_reserve(1) |
| #endif |
| |
| #if __FreeBSD_version < 1300102 |
| #define ASSERT_VOP_IN_SEQC(zp) |
| #define MNTK_FPLOOKUP 0 |
| #define vn_seqc_write_begin(vp) |
| #define vn_seqc_write_end(vp) |
| |
| #ifndef VFS_SMR_DECLARE |
| #define VFS_SMR_DECLARE |
| #endif |
| #ifndef VFS_SMR_ZONE_SET |
| #define VFS_SMR_ZONE_SET(zone) |
| #endif |
| #endif |
| |
| struct hlist_node { |
| struct hlist_node *next, **pprev; |
| }; |
| |
| struct hlist_head { |
| struct hlist_node *first; |
| }; |
| |
| typedef struct { |
| volatile int counter; |
| } atomic_t; |
| |
| /* BEGIN CSTYLED */ |
| #define hlist_for_each(p, head) \ |
| for (p = (head)->first; p; p = (p)->next) |
| |
| #define hlist_entry(ptr, type, field) container_of(ptr, type, field) |
| |
| #define container_of(ptr, type, member) \ |
| ({ \ |
| const __typeof(((type *)0)->member) *__p = (ptr); \ |
| (type *)((uintptr_t)__p - offsetof(type, member)); \ |
| }) |
| /* END CSTYLED */ |
| |
| static inline void |
| hlist_add_head(struct hlist_node *n, struct hlist_head *h) |
| { |
| n->next = h->first; |
| if (h->first != NULL) |
| h->first->pprev = &n->next; |
| WRITE_ONCE(h->first, n); |
| n->pprev = &h->first; |
| } |
| |
| static inline void |
| hlist_del(struct hlist_node *n) |
| { |
| WRITE_ONCE(*(n->pprev), n->next); |
| if (n->next != NULL) |
| n->next->pprev = n->pprev; |
| } |
| /* BEGIN CSTYLED */ |
| #define READ_ONCE(x) ({ \ |
| __typeof(x) __var = ({ \ |
| barrier(); \ |
| ACCESS_ONCE(x); \ |
| }); \ |
| barrier(); \ |
| __var; \ |
| }) |
| |
| #define HLIST_HEAD_INIT { } |
| #define HLIST_HEAD(name) struct hlist_head name = HLIST_HEAD_INIT |
| #define INIT_HLIST_HEAD(head) (head)->first = NULL |
| |
| #define INIT_HLIST_NODE(node) \ |
| do { \ |
| (node)->next = NULL; \ |
| (node)->pprev = NULL; \ |
| } while (0) |
| |
| /* END CSTYLED */ |
| static inline int |
| atomic_read(const atomic_t *v) |
| { |
| return (READ_ONCE(v->counter)); |
| } |
| |
| static inline int |
| atomic_inc(atomic_t *v) |
| { |
| return (atomic_fetchadd_int(&v->counter, 1) + 1); |
| } |
| |
| static inline int |
| atomic_dec(atomic_t *v) |
| { |
| return (atomic_fetchadd_int(&v->counter, -1) - 1); |
| } |
| #endif |