1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _SYS_CCOMPAT_H 29 #define _SYS_CCOMPAT_H 30 31 #if __FreeBSD_version < 1300051 32 #define vm_page_valid(m) (m)->valid = VM_PAGE_BITS_ALL 33 #define vm_page_do_sunbusy(m) 34 #define vm_page_none_valid(m) ((m)->valid == 0) 35 #else 36 #define vm_page_do_sunbusy(m) vm_page_sunbusy(m) 37 #endif 38 39 #if __FreeBSD_version < 1300074 40 #define VOP_UNLOCK1(x) VOP_UNLOCK(x, 0) 41 #else 42 #define VOP_UNLOCK1(x) VOP_UNLOCK(x) 43 #endif 44 45 #if __FreeBSD_version < 1300064 46 #define VN_IS_DOOMED(vp) ((vp)->v_iflag & VI_DOOMED) 47 #endif 48 49 #if __FreeBSD_version < 1300068 50 #define VFS_VOP_VECTOR_REGISTER(x) 51 #endif 52 53 #if __FreeBSD_version >= 1300076 54 #define getnewvnode_reserve_() getnewvnode_reserve() 55 #else 56 #define getnewvnode_reserve_() getnewvnode_reserve(1) 57 #endif 58 59 #if __FreeBSD_version < 1300102 60 #define ASSERT_VOP_IN_SEQC(zp) 61 #define MNTK_FPLOOKUP 0 62 #define vn_seqc_write_begin(vp) 63 #define vn_seqc_write_end(vp) 64 65 #ifndef VFS_SMR_DECLARE 66 #define VFS_SMR_DECLARE 67 #endif 68 #ifndef VFS_SMR_ZONE_SET 69 #define VFS_SMR_ZONE_SET(zone) 70 #endif 71 #endif 72 73 struct hlist_node { 74 struct hlist_node *next, **pprev; 75 }; 76 77 struct hlist_head { 78 struct hlist_node *first; 79 }; 80 81 typedef struct { 82 volatile int counter; 83 } atomic_t; 84 85 /* BEGIN CSTYLED */ 86 #define hlist_for_each(p, head) \ 87 for (p = (head)->first; p; p = (p)->next) 88 89 #define hlist_entry(ptr, type, field) container_of(ptr, type, field) 90 91 #define container_of(ptr, type, member) \ 92 ({ \ 93 const __typeof(((type *)0)->member) *__p = (ptr); \ 94 (type *)((uintptr_t)__p - offsetof(type, member)); \ 95 }) 96 /* END CSTYLED */ 97 98 static inline void 99 hlist_add_head(struct hlist_node *n, struct hlist_head *h) 100 { 101 n->next = h->first; 102 if (h->first != NULL) 103 h->first->pprev = &n->next; 104 WRITE_ONCE(h->first, n); 105 n->pprev = &h->first; 106 } 107 108 static inline void 109 hlist_del(struct hlist_node *n) 110 { 111 WRITE_ONCE(*(n->pprev), n->next); 112 if (n->next != NULL) 113 n->next->pprev = n->pprev; 114 } 115 /* BEGIN CSTYLED */ 116 #define READ_ONCE(x) ({ \ 117 __typeof(x) __var = ({ \ 118 barrier(); \ 119 ACCESS_ONCE(x); \ 120 }); \ 121 barrier(); \ 122 __var; \ 123 }) 124 125 #define HLIST_HEAD_INIT { } 126 #define HLIST_HEAD(name) struct hlist_head name = HLIST_HEAD_INIT 127 #define INIT_HLIST_HEAD(head) (head)->first = NULL 128 129 #define INIT_HLIST_NODE(node) \ 130 do { \ 131 (node)->next = NULL; \ 132 (node)->pprev = NULL; \ 133 } while (0) 134 135 /* END CSTYLED */ 136 static inline int 137 atomic_read(const atomic_t *v) 138 { 139 return (READ_ONCE(v->counter)); 140 } 141 142 static inline int 143 atomic_inc(atomic_t *v) 144 { 145 return (atomic_fetchadd_int(&v->counter, 1) + 1); 146 } 147 148 static inline int 149 atomic_dec(atomic_t *v) 150 { 151 return (atomic_fetchadd_int(&v->counter, -1) - 1); 152 } 153 #endif 154