1 /*- 2 * Copyright (c) 2014-2018, Matthew Macy <[email protected]> 3 * Copyright (C) 2017-2018 Joyent Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * 2. Neither the name of Matthew Macy nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_inet.h" 33 #include "opt_inet6.h" 34 #include "opt_acpi.h" 35 #include "opt_sched.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/bus.h> 40 #include <sys/eventhandler.h> 41 #include <sys/event.h> 42 #include <sys/sockio.h> 43 #include <sys/kernel.h> 44 #include <sys/lock.h> 45 #include <sys/mutex.h> 46 #include <sys/module.h> 47 #include <sys/kobj.h> 48 #include <sys/rman.h> 49 #include <sys/sbuf.h> 50 #include <sys/smp.h> 51 #include <sys/socket.h> 52 #include <sys/sysctl.h> 53 #include <sys/syslog.h> 54 #include <sys/taskqueue.h> 55 #include <sys/limits.h> 56 #include <sys/queue.h> 57 #include <sys/jail.h> 58 #include <sys/md5.h> 59 #include <sys/proc.h> 60 61 #include <net/if.h> 62 #include <net/if_var.h> 63 #include <net/if_types.h> 64 #include <net/if_media.h> 65 #include <net/if_clone.h> 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/vnet.h> 69 70 #include <net/iflib.h> 71 #include <net/iflib_private.h> 72 #include "ifdi_if.h" 73 74 int 75 noop_attach(device_t dev) 76 { 77 return (0); 78 } 79 80 int 81 iflib_pseudo_detach(device_t dev) 82 { 83 if_ctx_t ctx; 84 uint32_t ifc_flags; 85 86 ctx = device_get_softc(dev); 87 ifc_flags = iflib_get_flags(ctx); 88 if ((ifc_flags & IFC_INIT_DONE) == 0) 89 return (0); 90 return (IFDI_DETACH(ctx)); 91 } 92 93 static device_t iflib_pseudodev; 94 95 static struct mtx pseudoif_mtx; 96 MTX_SYSINIT(pseudoif_mtx, &pseudoif_mtx, "pseudoif_mtx", MTX_DEF); 97 98 #define PSEUDO_LOCK() mtx_lock(&pseudoif_mtx); 99 #define PSEUDO_UNLOCK() mtx_unlock(&pseudoif_mtx); 100 101 struct if_pseudo { 102 eventhandler_tag ip_detach_tag; 103 eventhandler_tag ip_lladdr_tag; 104 struct if_clone *ip_ifc; 105 if_shared_ctx_t ip_sctx; 106 devclass_t ip_dc; 107 LIST_ENTRY(if_pseudo) ip_list; 108 int ip_on_list; 109 }; 110 111 static LIST_HEAD(, if_pseudo) iflib_pseudos = LIST_HEAD_INITIALIZER(iflib_pseudos); 112 113 /* 114 * XXX this assumes that the rest of the 115 * code won't hang on to it after it's 116 * removed / unloaded 117 */ 118 static if_pseudo_t 119 iflib_ip_lookup(const char *name) 120 { 121 if_pseudo_t ip = NULL; 122 123 PSEUDO_LOCK(); 124 LIST_FOREACH(ip, &iflib_pseudos, ip_list) { 125 if (!strcmp(ip->ip_sctx->isc_name, name)) 126 break; 127 } 128 PSEUDO_UNLOCK(); 129 return (ip); 130 } 131 132 static void 133 iflib_ip_delete(if_pseudo_t ip) 134 { 135 PSEUDO_LOCK(); 136 if (ip->ip_on_list) { 137 LIST_REMOVE(ip, ip_list); 138 ip->ip_on_list = 0; 139 } 140 PSEUDO_UNLOCK(); 141 } 142 143 static void 144 iflib_ip_insert(if_pseudo_t ip) 145 { 146 PSEUDO_LOCK(); 147 if (!ip->ip_on_list) { 148 LIST_INSERT_HEAD(&iflib_pseudos, ip, ip_list); 149 ip->ip_on_list = 1; 150 } 151 PSEUDO_UNLOCK(); 152 } 153 154 static void 155 iflib_ifdetach(void *arg __unused, if_t ifp) 156 { 157 158 /* If the ifnet is just being renamed, don't do anything. */ 159 if (ifp->if_flags & IFF_RENAMING) 160 return; 161 } 162 163 static void 164 iflib_iflladdr(void *arg __unused, if_t ifp __unused) 165 { 166 167 } 168 169 static int 170 iflib_clone_create(struct if_clone *ifc, int unit, caddr_t params) 171 { 172 const char *name = ifc_name(ifc); 173 struct iflib_cloneattach_ctx clctx; 174 if_ctx_t ctx; 175 if_pseudo_t ip; 176 device_t dev; 177 int rc; 178 179 clctx.cc_ifc = ifc; 180 clctx.cc_len = 0; 181 clctx.cc_params = params; 182 clctx.cc_name = name; 183 184 if (__predict_false(iflib_pseudodev == NULL)) { 185 /* SYSINIT initialization would panic !?! */ 186 mtx_lock(&Giant); 187 iflib_pseudodev = device_add_child(root_bus, "ifpseudo", 0); 188 mtx_unlock(&Giant); 189 MPASS(iflib_pseudodev != NULL); 190 } 191 ip = iflib_ip_lookup(name); 192 if (ip == NULL) { 193 printf("no ip found for %s\n", name); 194 return (ENOENT); 195 } 196 if ((dev = devclass_get_device(ip->ip_dc, unit)) != NULL) { 197 printf("unit %d allocated\n", unit); 198 bus_generic_print_child(iflib_pseudodev, dev); 199 return (EBUSY); 200 } 201 PSEUDO_LOCK(); 202 dev = device_add_child(iflib_pseudodev, name, unit); 203 device_set_driver(dev, &iflib_pseudodriver); 204 PSEUDO_UNLOCK(); 205 device_quiet(dev); 206 rc = device_attach(dev); 207 MPASS(rc == 0); 208 MPASS(dev != NULL); 209 MPASS(devclass_get_device(ip->ip_dc, unit) == dev); 210 rc = iflib_pseudo_register(dev, ip->ip_sctx, &ctx, &clctx); 211 if (rc) { 212 mtx_lock(&Giant); 213 device_delete_child(iflib_pseudodev, dev); 214 mtx_unlock(&Giant); 215 } else 216 device_set_softc(dev, ctx); 217 218 return (rc); 219 } 220 221 static void 222 iflib_clone_destroy(if_t ifp) 223 { 224 if_ctx_t ctx; 225 device_t dev; 226 struct sx *ctx_lock; 227 int rc; 228 229 /* 230 * Detach device / free / free unit 231 */ 232 ctx = if_getsoftc(ifp); 233 dev = iflib_get_dev(ctx); 234 ctx_lock = iflib_ctx_lock_get(ctx); 235 sx_xlock(ctx_lock); 236 iflib_set_detach(ctx); 237 iflib_stop(ctx); 238 sx_xunlock(ctx_lock); 239 240 mtx_lock(&Giant); 241 rc = device_delete_child(iflib_pseudodev, dev); 242 mtx_unlock(&Giant); 243 if (rc == 0) 244 iflib_pseudo_deregister(ctx); 245 } 246 247 if_pseudo_t 248 iflib_clone_register(if_shared_ctx_t sctx) 249 { 250 if_pseudo_t ip; 251 252 if (sctx->isc_name == NULL) { 253 printf("iflib_clone_register failed - shared_ctx needs to have a device name\n"); 254 return (NULL); 255 } 256 if (iflib_ip_lookup(sctx->isc_name) != NULL) { 257 printf("iflib_clone_register failed - shared_ctx %s alread registered\n", 258 sctx->isc_name); 259 return (NULL); 260 } 261 ip = malloc(sizeof(*ip), M_IFLIB, M_WAITOK|M_ZERO); 262 ip->ip_sctx = sctx; 263 ip->ip_dc = devclass_create(sctx->isc_name); 264 if (ip->ip_dc == NULL) 265 goto fail_clone; 266 /* XXX --- we can handle clone_advanced later */ 267 ip->ip_ifc = if_clone_simple(sctx->isc_name, iflib_clone_create, iflib_clone_destroy, 0); 268 if (ip->ip_ifc == NULL) { 269 printf("clone_simple failed -- cloned %s devices will not be available\n", sctx->isc_name); 270 goto fail_clone; 271 } 272 ip->ip_lladdr_tag = EVENTHANDLER_REGISTER(iflladdr_event, 273 iflib_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 274 if (ip->ip_lladdr_tag == NULL) 275 goto fail_addr; 276 ip->ip_detach_tag = EVENTHANDLER_REGISTER(ifnet_departure_event, 277 iflib_ifdetach, NULL, EVENTHANDLER_PRI_ANY); 278 279 if (ip->ip_detach_tag == NULL) 280 goto fail_depart; 281 282 iflib_ip_insert(ip); 283 return (ip); 284 fail_depart: 285 EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag); 286 fail_addr: 287 if_clone_detach(ip->ip_ifc); 288 fail_clone: 289 free(ip, M_IFLIB); 290 return (NULL); 291 } 292 293 void 294 iflib_clone_deregister(if_pseudo_t ip) 295 { 296 /* XXX check that is not still in use */ 297 iflib_ip_delete(ip); 298 EVENTHANDLER_DEREGISTER(ifnet_departure_event, ip->ip_detach_tag); 299 EVENTHANDLER_DEREGISTER(iflladdr_event, ip->ip_lladdr_tag); 300 if_clone_detach(ip->ip_ifc); 301 /* XXX free devclass */ 302 free(ip, M_IFLIB); 303 } 304