1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * From: @(#)if.h 8.1 (Berkeley) 6/10/93 32 * $FreeBSD$ 33 */ 34 35 #ifndef _NET_IF_CLONE_H_ 36 #define _NET_IF_CLONE_H_ 37 38 #ifdef _KERNEL 39 40 #include <sys/_eventhandler.h> 41 42 #define CLONE_COMPAT_13 43 44 struct if_clone; 45 46 /* Public KPI */ 47 struct ifc_data { 48 uint32_t flags; 49 uint32_t unit; /* Selected unit when IFC_C_AUTOUNIT set */ 50 void *params; 51 struct vnet *vnet; 52 }; 53 54 typedef int ifc_match_f(struct if_clone *ifc, const char *name); 55 typedef int ifc_create_f(struct if_clone *ifc, char *name, size_t maxlen, 56 struct ifc_data *ifd, struct ifnet **ifpp); 57 typedef int ifc_destroy_f(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags); 58 59 struct if_clone_addreq { 60 uint16_t version; /* Always 0 for now */ 61 uint16_t spare; 62 uint32_t flags; 63 uint32_t maxunit; /* Maximum allowed unit number */ 64 ifc_match_f *match_f; 65 ifc_create_f *create_f; 66 ifc_destroy_f *destroy_f; 67 }; 68 69 #define IFC_F_NOGROUP 0x01 /* Creation flag: don't add unit group */ 70 #define IFC_F_AUTOUNIT 0x02 /* Creation flag: automatically select unit */ 71 #define IFC_F_SYSSPACE 0x04 /* Cloner callback: params pointer is in kernel memory */ 72 #define IFC_F_FORCE 0x08 /* Deletion flag: force interface deletion */ 73 74 #define IFC_NOGROUP IFC_F_NOGROUP 75 76 struct if_clone *ifc_attach_cloner(const char *name, struct if_clone_addreq *req); 77 void ifc_detach_cloner(struct if_clone *ifc); 78 int ifc_create_ifp(const char *name, struct ifc_data *ifd, 79 struct ifnet **ifpp); 80 81 void ifc_link_ifp(struct if_clone *ifc, struct ifnet *ifp); 82 bool ifc_unlink_ifp(struct if_clone *ifc, struct ifnet *ifp); 83 84 int ifc_copyin(const struct ifc_data *ifd, void *target, size_t len); 85 #ifdef CLONE_COMPAT_13 86 87 /* Methods. */ 88 typedef int ifc_match_t(struct if_clone *, const char *); 89 typedef int ifc_create_t(struct if_clone *, char *, size_t, caddr_t); 90 typedef int ifc_destroy_t(struct if_clone *, struct ifnet *); 91 92 typedef int ifcs_create_t(struct if_clone *, int, caddr_t); 93 typedef void ifcs_destroy_t(struct ifnet *); 94 95 /* Interface cloner (de)allocating functions. */ 96 struct if_clone * 97 if_clone_advanced(const char *, u_int, ifc_match_t, ifc_create_t, 98 ifc_destroy_t); 99 struct if_clone * 100 if_clone_simple(const char *, ifcs_create_t, ifcs_destroy_t, u_int); 101 void if_clone_detach(struct if_clone *); 102 #endif 103 104 /* Unit (de)allocating functions. */ 105 int ifc_name2unit(const char *name, int *unit); 106 int ifc_alloc_unit(struct if_clone *, int *); 107 void ifc_free_unit(struct if_clone *, int); 108 const char *ifc_name(struct if_clone *); 109 void ifc_flags_set(struct if_clone *, int flags); 110 int ifc_flags_get(struct if_clone *); 111 112 /* Interface clone event. */ 113 typedef void (*if_clone_event_handler_t)(void *, struct if_clone *); 114 EVENTHANDLER_DECLARE(if_clone_event, if_clone_event_handler_t); 115 116 /* The below interfaces used only by net/if.c. */ 117 void vnet_if_clone_init(void); 118 int if_clone_create(char *, size_t, caddr_t); 119 int if_clone_destroy(const char *); 120 int if_clone_list(struct if_clonereq *); 121 void if_clone_restoregroup(struct ifnet *); 122 123 /* The below interfaces are used only by epair(4). */ 124 void if_clone_addif(struct if_clone *, struct ifnet *); 125 int if_clone_destroyif(struct if_clone *, struct ifnet *); 126 127 #endif /* _KERNEL */ 128 #endif /* !_NET_IF_CLONE_H_ */ 129