1 /* $NetBSD: if_agrsubr.c,v 1.12 2018/01/25 03:54:57 christos 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 1.12 2018/01/25 03:54:57 christos 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 #include <net/if_ether.h> 46 47 #include <net/agr/if_agrvar_impl.h> 48 #include <net/agr/if_agrsubr.h> 49 50 struct agr_mc_entry { 51 TAILQ_ENTRY(agr_mc_entry) ame_q; 52 int ame_refcnt; 53 struct agr_ifreq ame_ifr; /* XXX waste */ 54 }; 55 56 static struct agr_mc_entry *agr_mc_lookup(struct agr_multiaddrs *, 57 const struct sockaddr *); 58 static int agrport_mc_add_callback(struct agr_port *, void *); 59 static int agrport_mc_del_callback(struct agr_port *, void *); 60 static int agrmc_mc_add_callback(struct agr_mc_entry *, void *); 61 static int agrmc_mc_del_callback(struct agr_mc_entry *, void *); 62 63 static int agr_mc_add(struct agr_multiaddrs *, const struct sockaddr *); 64 static int agr_mc_del(struct agr_multiaddrs *, const struct sockaddr *); 65 66 int 67 agr_mc_purgeall(struct agr_softc *sc, struct agr_multiaddrs *ama) 68 { 69 struct agr_mc_entry *ame; 70 int error = 0; 71 72 while ((ame = TAILQ_FIRST(&ama->ama_addrs)) != NULL) { 73 error = agr_port_foreach(sc, 74 agrport_mc_del_callback, &ame->ame_ifr); 75 if (error) { 76 /* XXX XXX */ 77 printf("%s: error %d\n", __func__, error); 78 } 79 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 80 free(ame, M_DEVBUF); 81 } 82 83 return error; 84 } 85 86 int 87 agr_mc_init(struct agr_softc *sc, struct agr_multiaddrs *ama) 88 { 89 90 TAILQ_INIT(&ama->ama_addrs); 91 92 return 0; 93 } 94 95 /* ==================== */ 96 97 static struct agr_mc_entry * 98 agr_mc_lookup(struct agr_multiaddrs *ama, const struct sockaddr *sa) 99 { 100 struct agr_mc_entry *ame; 101 102 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 103 if (!memcmp(&ame->ame_ifr.ifr_ss, sa, sa->sa_len)) 104 return ame; 105 } 106 107 return NULL; 108 } 109 110 int 111 agr_mc_foreach(struct agr_multiaddrs *ama, 112 int (*func)(struct agr_mc_entry *, void *), void *arg) 113 { 114 struct agr_mc_entry *ame; 115 int error = 0; 116 117 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) { 118 error = (*func)(ame, arg); 119 if (error) { 120 /* 121 * XXX how to recover? 122 * we can try to restore setting, but it can also fail.. 123 */ 124 break; 125 } 126 } 127 128 return error; 129 } 130 131 static int 132 agr_mc_add(struct agr_multiaddrs *ama, const struct sockaddr *sa) 133 { 134 struct agr_mc_entry *ame; 135 136 ame = agr_mc_lookup(ama, sa); 137 if (ame) { 138 ame->ame_refcnt++; 139 return 0; 140 } 141 142 ame = malloc(sizeof(*ame), M_DEVBUF, M_NOWAIT | M_ZERO); 143 if (ame == NULL) 144 return ENOMEM; 145 146 memcpy(&ame->ame_ifr.ifr_ss, sa, sa->sa_len); 147 ame->ame_refcnt = 1; 148 TAILQ_INSERT_TAIL(&ama->ama_addrs, ame, ame_q); 149 150 return ENETRESET; 151 } 152 153 static int 154 agr_mc_del(struct agr_multiaddrs *ama, const struct sockaddr *sa) 155 { 156 struct agr_mc_entry *ame; 157 158 ame = agr_mc_lookup(ama, sa); 159 if (ame == NULL) 160 return ENOENT; 161 162 ame->ame_refcnt--; 163 if (ame->ame_refcnt > 0) 164 return 0; 165 166 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q); 167 free(ame, M_DEVBUF); 168 169 return ENETRESET; 170 } 171 172 /* ==================== */ 173 174 int 175 agr_port_foreach(struct agr_softc *sc, 176 int (*func)(struct agr_port *, void *), void *arg) 177 { 178 struct agr_port *port; 179 int error = 0; 180 181 TAILQ_FOREACH(port, &sc->sc_ports, port_q) { 182 if ((port->port_flags & (AGRPORT_LARVAL | AGRPORT_DETACHING))) { 183 continue; 184 } 185 error = (func)(port, arg); 186 if (error) { 187 /* 188 * XXX how to recover? 189 * we can try to restore setting, but it can also fail.. 190 */ 191 break; 192 } 193 } 194 195 return error; 196 } 197 198 /* ==================== */ 199 200 static int 201 agrmc_mc_add_callback(struct agr_mc_entry *ame, void *arg) 202 { 203 204 return agrport_mc_add_callback(arg, &ame->ame_ifr); 205 } 206 207 static int 208 agrmc_mc_del_callback(struct agr_mc_entry *ame, void *arg) 209 { 210 211 return agrport_mc_del_callback(arg, &ame->ame_ifr); 212 } 213 214 int 215 agr_configmulti_port(struct agr_multiaddrs *ama, struct agr_port *port, 216 bool add) 217 { 218 219 return agr_mc_foreach(ama, 220 add ? agrmc_mc_add_callback : agrmc_mc_del_callback, port); 221 } 222 223 /* -------------------- */ 224 225 static int 226 agrport_mc_add_callback(struct agr_port *port, void *arg) 227 { 228 229 return agrport_ioctl(port, SIOCADDMULTI, arg); 230 } 231 232 static int 233 agrport_mc_del_callback(struct agr_port *port, void *arg) 234 { 235 236 return agrport_ioctl(port, SIOCDELMULTI, arg); 237 } 238 239 int 240 agr_configmulti_ifreq(struct agr_softc *sc, struct agr_multiaddrs *ama, 241 struct ifreq *ifr, bool add) 242 { 243 int error; 244 245 if (add) 246 error = agr_mc_add(ama, ifreq_getaddr(SIOCADDMULTI, ifr)); 247 else 248 error = agr_mc_del(ama, ifreq_getaddr(SIOCDELMULTI, ifr)); 249 250 if (error != ENETRESET) 251 return error; 252 253 return agr_port_foreach(sc, 254 add ? agrport_mc_add_callback : agrport_mc_del_callback, ifr); 255 } 256 257 /* ==================== */ 258 259 int 260 agr_port_getmedia(struct agr_port *port, u_int *media, u_int *status) 261 { 262 struct ifmediareq ifmr; 263 int error; 264 265 memset(&ifmr, 0, sizeof(ifmr)); 266 ifmr.ifm_count = 0; 267 error = agrport_ioctl(port, SIOCGIFMEDIA, (void *)&ifmr); 268 269 if (error == 0) { 270 *media = ifmr.ifm_active; 271 *status = ifmr.ifm_status; 272 } 273 274 return error; 275 } 276 277 /* ==================== */ 278 279 /* 280 * Enable vlan hardware assist for the specified port. 281 */ 282 int 283 agr_vlan_add(struct agr_port *port, void *arg) 284 { 285 struct ifnet *ifp = port->port_ifp; 286 struct ethercom *ec_port = (void *)ifp; 287 int error=0; 288 289 if (ec_port->ec_nvlans++ == 0 && 290 (ec_port->ec_capabilities & ETHERCAP_VLAN_MTU) != 0) { 291 struct ifnet *p = port->port_ifp; 292 /* 293 * Enable Tx/Rx of VLAN-sized frames. 294 */ 295 ec_port->ec_capenable |= ETHERCAP_VLAN_MTU; 296 if (p->if_flags & IFF_UP) { 297 IFNET_LOCK(p); 298 error = if_flags_set(p, p->if_flags); 299 IFNET_UNLOCK(p); 300 if (error) { 301 if (ec_port->ec_nvlans-- == 1) 302 ec_port->ec_capenable &= 303 ~ETHERCAP_VLAN_MTU; 304 return (error); 305 } 306 } 307 } 308 309 return error; 310 } 311 312 /* 313 * Disable vlan hardware assist for the specified port. 314 */ 315 int 316 agr_vlan_del(struct agr_port *port, void *arg) 317 { 318 struct ethercom *ec_port = (void *)port->port_ifp; 319 bool *force_zero = (bool *)arg; 320 321 KASSERT(force_zero != NULL); 322 323 /* Disable vlan support */ 324 if ((*force_zero && ec_port->ec_nvlans > 0) || 325 ec_port->ec_nvlans-- == 1) { 326 struct ifnet *p = port->port_ifp; 327 if (*force_zero) 328 ec_port->ec_nvlans = 0; 329 /* 330 * Disable Tx/Rx of VLAN-sized frames. 331 */ 332 ec_port->ec_capenable &= ~ETHERCAP_VLAN_MTU; 333 if (p->if_flags & IFF_UP) { 334 IFNET_LOCK(p); 335 (void)if_flags_set(p, p->if_flags); 336 IFNET_UNLOCK(p); 337 } 338 } 339 340 return 0; 341 } 342