1 /* $NetBSD: if_agrsubr.c,v 1.9 2010/01/19 22:08:17 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 1.9 2010/01/19 22:08:17 pooka Exp $"); 31 32 #include "opt_inet.h" 33 34 #include <sys/param.h> 35 #include <sys/callout.h> 36 #include <sys/malloc.h> 37 #include <sys/systm.h> 38 #include <sys/types.h> 39 #include <sys/queue.h> 40 #include <sys/sockio.h> 41 42 #include <net/if.h> 43 44 #include <net/agr/if_agrvar_impl.h> 45 #include <net/agr/if_agrsubr.h> 46 47 struct agr_mc_entry { 48 TAILQ_ENTRY(agr_mc_entry) ame_q; 49 int ame_refcnt; 50 struct agr_ifreq ame_ifr; /* XXX waste */ 51 }; 52 53 static struct agr_mc_entry *agr_mc_lookup(struct agr_multiaddrs *, 54 const struct sockaddr *); 55 static int agrport_mc_add_callback(struct agr_port *, void *); 56 static int agrport_mc_del_callback(struct agr_port *, void *); 57 static int agrmc_mc_add_callback(struct agr_mc_entry *, void *); 58 static int agrmc_mc_del_callback(struct agr_mc_entry *, void *); 59 60 static int agr_mc_add(struct agr_multiaddrs *, const struct sockaddr *); 61 static int agr_mc_del(struct agr_multiaddrs *, const struct sockaddr *); 62 63 int 64 agr_mc_purgeall(struct agr_softc *sc, struct agr_multiaddrs *ama) 65 { 66 struct agr_mc_entry *ame; 67 int error = 0; 68 69 while ((ame = TAILQ_FIRST(&ama->ama_addrs)) != NULL) { 70 error = agr_port_foreach(sc, 71 agrport_mc_del_callback, &ame->ame_ifr); 72 if (error) { 73 /* XXX XXX */ 74 printf("%s: error %d\n", __func__, error); 75 } 76 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 77 free(ame, M_DEVBUF); 78 } 79 80 return error; 81 } 82 83 int 84 agr_mc_init(struct agr_softc *sc, struct agr_multiaddrs *ama) 85 { 86 87 TAILQ_INIT(&ama->ama_addrs); 88 89 return 0; 90 } 91 92 /* ==================== */ 93 94 static struct agr_mc_entry * 95 agr_mc_lookup(struct agr_multiaddrs *ama, const struct sockaddr *sa) 96 { 97 struct agr_mc_entry *ame; 98 99 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 100 if (!memcmp(&ame->ame_ifr.ifr_ss, sa, sa->sa_len)) 101 return ame; 102 } 103 104 return NULL; 105 } 106 107 int 108 agr_mc_foreach(struct agr_multiaddrs *ama, 109 int (*func)(struct agr_mc_entry *, void *), void *arg) 110 { 111 struct agr_mc_entry *ame; 112 int error = 0; 113 114 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 115 error = (*func)(ame, arg); 116 if (error) { 117 /* 118 * XXX how to recover? 119 * we can try to restore setting, but it can also fail.. 120 */ 121 break; 122 } 123 } 124 125 return error; 126 } 127 128 static int 129 agr_mc_add(struct agr_multiaddrs *ama, const struct sockaddr *sa) 130 { 131 struct agr_mc_entry *ame; 132 133 ame = agr_mc_lookup(ama, sa); 134 if (ame) { 135 ame->ame_refcnt++; 136 return 0; 137 } 138 139 ame = malloc(sizeof(*ame), M_DEVBUF, M_NOWAIT | M_ZERO); 140 if (ame == NULL) 141 return ENOMEM; 142 143 memcpy(&ame->ame_ifr.ifr_ss, sa, sa->sa_len); 144 ame->ame_refcnt = 1; 145 TAILQ_INSERT_TAIL(&ama->ama_addrs, ame, ame_q); 146 147 return ENETRESET; 148 } 149 150 static int 151 agr_mc_del(struct agr_multiaddrs *ama, const struct sockaddr *sa) 152 { 153 struct agr_mc_entry *ame; 154 155 ame = agr_mc_lookup(ama, sa); 156 if (ame == NULL) 157 return ENOENT; 158 159 ame->ame_refcnt--; 160 if (ame->ame_refcnt > 0) 161 return 0; 162 163 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 164 free(ame, M_DEVBUF); 165 166 return ENETRESET; 167 } 168 169 /* ==================== */ 170 171 int 172 agr_port_foreach(struct agr_softc *sc, 173 int (*func)(struct agr_port *, void *), void *arg) 174 { 175 struct agr_port *port; 176 int error = 0; 177 178 TAILQ_FOREACH(port, &sc->sc_ports, port_q) { 179 if ((port->port_flags & (AGRPORT_LARVAL | AGRPORT_DETACHING))) { 180 continue; 181 } 182 error = (func)(port, arg); 183 if (error) { 184 /* 185 * XXX how to recover? 186 * we can try to restore setting, but it can also fail.. 187 */ 188 break; 189 } 190 } 191 192 return error; 193 } 194 195 /* ==================== */ 196 197 static int 198 agrmc_mc_add_callback(struct agr_mc_entry *ame, void *arg) 199 { 200 201 return agrport_mc_add_callback(arg, &ame->ame_ifr); 202 } 203 204 static int 205 agrmc_mc_del_callback(struct agr_mc_entry *ame, void *arg) 206 { 207 208 return agrport_mc_del_callback(arg, &ame->ame_ifr); 209 } 210 211 int 212 agr_configmulti_port(struct agr_multiaddrs *ama, struct agr_port *port, 213 bool add) 214 { 215 216 return agr_mc_foreach(ama, 217 add ? agrmc_mc_add_callback : agrmc_mc_del_callback, port); 218 } 219 220 /* -------------------- */ 221 222 static int 223 agrport_mc_add_callback(struct agr_port *port, void *arg) 224 { 225 226 return agrport_ioctl(port, SIOCADDMULTI, arg); 227 } 228 229 static int 230 agrport_mc_del_callback(struct agr_port *port, void *arg) 231 { 232 233 return agrport_ioctl(port, SIOCDELMULTI, arg); 234 } 235 236 int 237 agr_configmulti_ifreq(struct agr_softc *sc, struct agr_multiaddrs *ama, 238 struct ifreq *ifr, bool add) 239 { 240 int error; 241 242 if (add) 243 error = agr_mc_add(ama, ifreq_getaddr(SIOCADDMULTI, ifr)); 244 else 245 error = agr_mc_del(ama, ifreq_getaddr(SIOCDELMULTI, ifr)); 246 247 if (error != ENETRESET) 248 return error; 249 250 return agr_port_foreach(sc, 251 add ? agrport_mc_add_callback : agrport_mc_del_callback, ifr); 252 } 253 254 /* ==================== */ 255 256 int 257 agr_port_getmedia(struct agr_port *port, u_int *media, u_int *status) 258 { 259 struct ifmediareq ifmr; 260 int error; 261 262 memset(&ifmr, 0, sizeof(ifmr)); 263 ifmr.ifm_count = 0; 264 error = agrport_ioctl(port, SIOCGIFMEDIA, (void *)&ifmr); 265 266 if (error == 0) { 267 *media = ifmr.ifm_active; 268 *status = ifmr.ifm_status; 269 } 270 271 return error; 272 } 273