1 /* $NetBSD: if_agrsubr.c,v 1.10 2015/08/24 22:21:26 pooka Exp $ */ 2 3 /*- 4 * Copyright (c)2005 YAMAMOTO Takashi, 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: if_agrsubr.c,v 1.10 2015/08/24 22:21:26 pooka Exp $"); 31 32 #ifdef _KERNEL_OPT 33 #include "opt_inet.h" 34 #endif 35 36 #include <sys/param.h> 37 #include <sys/callout.h> 38 #include <sys/malloc.h> 39 #include <sys/systm.h> 40 #include <sys/types.h> 41 #include <sys/queue.h> 42 #include <sys/sockio.h> 43 44 #include <net/if.h> 45 46 #include <net/agr/if_agrvar_impl.h> 47 #include <net/agr/if_agrsubr.h> 48 49 struct agr_mc_entry { 50 TAILQ_ENTRY(agr_mc_entry) ame_q; 51 int ame_refcnt; 52 struct agr_ifreq ame_ifr; /* XXX waste */ 53 }; 54 55 static struct agr_mc_entry *agr_mc_lookup(struct agr_multiaddrs *, 56 const struct sockaddr *); 57 static int agrport_mc_add_callback(struct agr_port *, void *); 58 static int agrport_mc_del_callback(struct agr_port *, void *); 59 static int agrmc_mc_add_callback(struct agr_mc_entry *, void *); 60 static int agrmc_mc_del_callback(struct agr_mc_entry *, void *); 61 62 static int agr_mc_add(struct agr_multiaddrs *, const struct sockaddr *); 63 static int agr_mc_del(struct agr_multiaddrs *, const struct sockaddr *); 64 65 int 66 agr_mc_purgeall(struct agr_softc *sc, struct agr_multiaddrs *ama) 67 { 68 struct agr_mc_entry *ame; 69 int error = 0; 70 71 while ((ame = TAILQ_FIRST(&ama->ama_addrs)) != NULL) { 72 error = agr_port_foreach(sc, 73 agrport_mc_del_callback, &ame->ame_ifr); 74 if (error) { 75 /* XXX XXX */ 76 printf("%s: error %d\n", __func__, error); 77 } 78 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 79 free(ame, M_DEVBUF); 80 } 81 82 return error; 83 } 84 85 int 86 agr_mc_init(struct agr_softc *sc, struct agr_multiaddrs *ama) 87 { 88 89 TAILQ_INIT(&ama->ama_addrs); 90 91 return 0; 92 } 93 94 /* ==================== */ 95 96 static struct agr_mc_entry * 97 agr_mc_lookup(struct agr_multiaddrs *ama, const struct sockaddr *sa) 98 { 99 struct agr_mc_entry *ame; 100 101 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 102 if (!memcmp(&ame->ame_ifr.ifr_ss, sa, sa->sa_len)) 103 return ame; 104 } 105 106 return NULL; 107 } 108 109 int 110 agr_mc_foreach(struct agr_multiaddrs *ama, 111 int (*func)(struct agr_mc_entry *, void *), void *arg) 112 { 113 struct agr_mc_entry *ame; 114 int error = 0; 115 116 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 117 error = (*func)(ame, arg); 118 if (error) { 119 /* 120 * XXX how to recover? 121 * we can try to restore setting, but it can also fail.. 122 */ 123 break; 124 } 125 } 126 127 return error; 128 } 129 130 static int 131 agr_mc_add(struct agr_multiaddrs *ama, const struct sockaddr *sa) 132 { 133 struct agr_mc_entry *ame; 134 135 ame = agr_mc_lookup(ama, sa); 136 if (ame) { 137 ame->ame_refcnt++; 138 return 0; 139 } 140 141 ame = malloc(sizeof(*ame), M_DEVBUF, M_NOWAIT | M_ZERO); 142 if (ame == NULL) 143 return ENOMEM; 144 145 memcpy(&ame->ame_ifr.ifr_ss, sa, sa->sa_len); 146 ame->ame_refcnt = 1; 147 TAILQ_INSERT_TAIL(&ama->ama_addrs, ame, ame_q); 148 149 return ENETRESET; 150 } 151 152 static int 153 agr_mc_del(struct agr_multiaddrs *ama, const struct sockaddr *sa) 154 { 155 struct agr_mc_entry *ame; 156 157 ame = agr_mc_lookup(ama, sa); 158 if (ame == NULL) 159 return ENOENT; 160 161 ame->ame_refcnt--; 162 if (ame->ame_refcnt > 0) 163 return 0; 164 165 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 166 free(ame, M_DEVBUF); 167 168 return ENETRESET; 169 } 170 171 /* ==================== */ 172 173 int 174 agr_port_foreach(struct agr_softc *sc, 175 int (*func)(struct agr_port *, void *), void *arg) 176 { 177 struct agr_port *port; 178 int error = 0; 179 180 TAILQ_FOREACH(port, &sc->sc_ports, port_q) { 181 if ((port->port_flags & (AGRPORT_LARVAL | AGRPORT_DETACHING))) { 182 continue; 183 } 184 error = (func)(port, arg); 185 if (error) { 186 /* 187 * XXX how to recover? 188 * we can try to restore setting, but it can also fail.. 189 */ 190 break; 191 } 192 } 193 194 return error; 195 } 196 197 /* ==================== */ 198 199 static int 200 agrmc_mc_add_callback(struct agr_mc_entry *ame, void *arg) 201 { 202 203 return agrport_mc_add_callback(arg, &ame->ame_ifr); 204 } 205 206 static int 207 agrmc_mc_del_callback(struct agr_mc_entry *ame, void *arg) 208 { 209 210 return agrport_mc_del_callback(arg, &ame->ame_ifr); 211 } 212 213 int 214 agr_configmulti_port(struct agr_multiaddrs *ama, struct agr_port *port, 215 bool add) 216 { 217 218 return agr_mc_foreach(ama, 219 add ? agrmc_mc_add_callback : agrmc_mc_del_callback, port); 220 } 221 222 /* -------------------- */ 223 224 static int 225 agrport_mc_add_callback(struct agr_port *port, void *arg) 226 { 227 228 return agrport_ioctl(port, SIOCADDMULTI, arg); 229 } 230 231 static int 232 agrport_mc_del_callback(struct agr_port *port, void *arg) 233 { 234 235 return agrport_ioctl(port, SIOCDELMULTI, arg); 236 } 237 238 int 239 agr_configmulti_ifreq(struct agr_softc *sc, struct agr_multiaddrs *ama, 240 struct ifreq *ifr, bool add) 241 { 242 int error; 243 244 if (add) 245 error = agr_mc_add(ama, ifreq_getaddr(SIOCADDMULTI, ifr)); 246 else 247 error = agr_mc_del(ama, ifreq_getaddr(SIOCDELMULTI, ifr)); 248 249 if (error != ENETRESET) 250 return error; 251 252 return agr_port_foreach(sc, 253 add ? agrport_mc_add_callback : agrport_mc_del_callback, ifr); 254 } 255 256 /* ==================== */ 257 258 int 259 agr_port_getmedia(struct agr_port *port, u_int *media, u_int *status) 260 { 261 struct ifmediareq ifmr; 262 int error; 263 264 memset(&ifmr, 0, sizeof(ifmr)); 265 ifmr.ifm_count = 0; 266 error = agrport_ioctl(port, SIOCGIFMEDIA, (void *)&ifmr); 267 268 if (error == 0) { 269 *media = ifmr.ifm_active; 270 *status = ifmr.ifm_status; 271 } 272 273 return error; 274 } 275