1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_INETDEVICE_H_ 32 #define _LINUX_INETDEVICE_H_ 33 34 #include <linux/netdevice.h> 35 36 static inline struct net_device * 37 ip_dev_find(struct vnet *vnet, uint32_t addr) 38 { 39 struct sockaddr_in sin; 40 struct epoch_tracker et; 41 struct ifaddr *ifa; 42 struct ifnet *ifp; 43 44 memset(&sin, 0, sizeof(sin)); 45 sin.sin_addr.s_addr = addr; 46 sin.sin_len = sizeof(sin); 47 sin.sin_family = AF_INET; 48 NET_EPOCH_ENTER(et); 49 CURVNET_SET_QUIET(vnet); 50 ifa = ifa_ifwithaddr((struct sockaddr *)&sin); 51 CURVNET_RESTORE(); 52 if (ifa) { 53 ifp = ifa->ifa_ifp; 54 if_ref(ifp); 55 } else { 56 ifp = NULL; 57 } 58 NET_EPOCH_EXIT(et); 59 return (ifp); 60 } 61 62 static inline struct net_device * 63 ip6_dev_find(struct vnet *vnet, struct in6_addr addr, uint16_t scope_id) 64 { 65 struct sockaddr_in6 sin6; 66 struct epoch_tracker et; 67 struct ifaddr *ifa; 68 struct ifnet *ifp; 69 70 memset(&sin6, 0, sizeof(sin6)); 71 sin6.sin6_addr = addr; 72 sin6.sin6_len = sizeof(sin6); 73 sin6.sin6_family = AF_INET6; 74 if (IN6_IS_SCOPE_LINKLOCAL(&addr) || 75 IN6_IS_ADDR_MC_INTFACELOCAL(&addr)) { 76 /* embed the IPv6 scope ID */ 77 sin6.sin6_addr.s6_addr16[1] = htons(scope_id); 78 } 79 NET_EPOCH_ENTER(et); 80 CURVNET_SET_QUIET(vnet); 81 ifa = ifa_ifwithaddr((struct sockaddr *)&sin6); 82 CURVNET_RESTORE(); 83 if (ifa != NULL) { 84 ifp = ifa->ifa_ifp; 85 if_ref(ifp); 86 } else { 87 ifp = NULL; 88 } 89 NET_EPOCH_EXIT(et); 90 return (ifp); 91 } 92 93 #endif /* _LINUX_INETDEVICE_H_ */ 94