1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/sysmacros.h> 28 #include <sys/conf.h> 29 #include <sys/cmn_err.h> 30 #include <sys/list.h> 31 #include <sys/ksynch.h> 32 #include <sys/kmem.h> 33 #include <sys/stream.h> 34 #include <sys/modctl.h> 35 #include <sys/ddi.h> 36 #include <sys/sunddi.h> 37 #include <sys/atomic.h> 38 #include <sys/stat.h> 39 #include <sys/modhash.h> 40 #include <sys/strsubr.h> 41 #include <sys/strsun.h> 42 #include <sys/dlpi.h> 43 #include <sys/mac.h> 44 #include <sys/mac_provider.h> 45 #include <sys/mac_client.h> 46 #include <sys/mac_client_priv.h> 47 #include <sys/mac_ether.h> 48 #include <sys/dls.h> 49 #include <sys/pattr.h> 50 #include <sys/time.h> 51 #include <sys/vlan.h> 52 #include <sys/vnic.h> 53 #include <sys/vnic_impl.h> 54 #include <sys/mac_flow_impl.h> 55 #include <inet/ip_impl.h> 56 57 /* 58 * Note that for best performance, the VNIC is a passthrough design. 59 * For each VNIC corresponds a MAC client of the underlying MAC (lower MAC). 60 * This MAC client is opened by the VNIC driver at VNIC creation, 61 * and closed when the VNIC is deleted. 62 * When a MAC client of the VNIC itself opens a VNIC, the MAC layer 63 * (upper MAC) detects that the MAC being opened is a VNIC. Instead 64 * of allocating a new MAC client, it asks the VNIC driver to return 65 * the lower MAC client handle associated with the VNIC, and that handle 66 * is returned to the upper MAC client directly. This allows access 67 * by upper MAC clients of the VNIC to have direct access to the lower 68 * MAC client for the control path and data path. 69 * 70 * Due to this passthrough, some of the entry points exported by the 71 * VNIC driver are never directly invoked. These entry points include 72 * vnic_m_start, vnic_m_stop, vnic_m_promisc, vnic_m_multicst, etc. 73 */ 74 75 static int vnic_m_start(void *); 76 static void vnic_m_stop(void *); 77 static int vnic_m_promisc(void *, boolean_t); 78 static int vnic_m_multicst(void *, boolean_t, const uint8_t *); 79 static int vnic_m_unicst(void *, const uint8_t *); 80 static int vnic_m_stat(void *, uint_t, uint64_t *); 81 static void vnic_m_ioctl(void *, queue_t *, mblk_t *); 82 static int vnic_m_setprop(void *, const char *, mac_prop_id_t, uint_t, 83 const void *); 84 static int vnic_m_getprop(void *, const char *, mac_prop_id_t, uint_t, 85 uint_t, void *, uint_t *); 86 static mblk_t *vnic_m_tx(void *, mblk_t *); 87 static boolean_t vnic_m_capab_get(void *, mac_capab_t, void *); 88 static void vnic_notify_cb(void *, mac_notify_type_t); 89 90 static kmem_cache_t *vnic_cache; 91 static krwlock_t vnic_lock; 92 static uint_t vnic_count; 93 94 /* hash of VNICs (vnic_t's), keyed by VNIC id */ 95 static mod_hash_t *vnic_hash; 96 #define VNIC_HASHSZ 64 97 #define VNIC_HASH_KEY(vnic_id) ((mod_hash_key_t)(uintptr_t)vnic_id) 98 99 #define VNIC_M_CALLBACK_FLAGS \ 100 (MC_IOCTL | MC_GETCAPAB | MC_SETPROP | MC_GETPROP) 101 102 static mac_callbacks_t vnic_m_callbacks = { 103 VNIC_M_CALLBACK_FLAGS, 104 vnic_m_stat, 105 vnic_m_start, 106 vnic_m_stop, 107 vnic_m_promisc, 108 vnic_m_multicst, 109 vnic_m_unicst, 110 vnic_m_tx, 111 vnic_m_ioctl, 112 vnic_m_capab_get, 113 NULL, 114 NULL, 115 vnic_m_setprop, 116 vnic_m_getprop 117 }; 118 119 void 120 vnic_dev_init(void) 121 { 122 vnic_cache = kmem_cache_create("vnic_cache", 123 sizeof (vnic_t), 0, NULL, NULL, NULL, NULL, NULL, 0); 124 125 vnic_hash = mod_hash_create_idhash("vnic_hash", 126 VNIC_HASHSZ, mod_hash_null_valdtor); 127 128 rw_init(&vnic_lock, NULL, RW_DEFAULT, NULL); 129 130 vnic_count = 0; 131 } 132 133 void 134 vnic_dev_fini(void) 135 { 136 ASSERT(vnic_count == 0); 137 138 rw_destroy(&vnic_lock); 139 mod_hash_destroy_idhash(vnic_hash); 140 kmem_cache_destroy(vnic_cache); 141 } 142 143 uint_t 144 vnic_dev_count(void) 145 { 146 return (vnic_count); 147 } 148 149 static vnic_ioc_diag_t 150 vnic_mac2vnic_diag(mac_diag_t diag) 151 { 152 switch (diag) { 153 case MAC_DIAG_MACADDR_NIC: 154 return (VNIC_IOC_DIAG_MACADDR_NIC); 155 case MAC_DIAG_MACADDR_INUSE: 156 return (VNIC_IOC_DIAG_MACADDR_INUSE); 157 case MAC_DIAG_MACADDR_INVALID: 158 return (VNIC_IOC_DIAG_MACADDR_INVALID); 159 case MAC_DIAG_MACADDRLEN_INVALID: 160 return (VNIC_IOC_DIAG_MACADDRLEN_INVALID); 161 case MAC_DIAG_MACFACTORYSLOTINVALID: 162 return (VNIC_IOC_DIAG_MACFACTORYSLOTINVALID); 163 case MAC_DIAG_MACFACTORYSLOTUSED: 164 return (VNIC_IOC_DIAG_MACFACTORYSLOTUSED); 165 case MAC_DIAG_MACFACTORYSLOTALLUSED: 166 return (VNIC_IOC_DIAG_MACFACTORYSLOTALLUSED); 167 case MAC_DIAG_MACFACTORYNOTSUP: 168 return (VNIC_IOC_DIAG_MACFACTORYNOTSUP); 169 case MAC_DIAG_MACPREFIX_INVALID: 170 return (VNIC_IOC_DIAG_MACPREFIX_INVALID); 171 case MAC_DIAG_MACPREFIXLEN_INVALID: 172 return (VNIC_IOC_DIAG_MACPREFIXLEN_INVALID); 173 case MAC_DIAG_MACNO_HWRINGS: 174 return (VNIC_IOC_DIAG_NO_HWRINGS); 175 default: 176 return (VNIC_IOC_DIAG_NONE); 177 } 178 } 179 180 static int 181 vnic_unicast_add(vnic_t *vnic, vnic_mac_addr_type_t vnic_addr_type, 182 int *addr_slot, uint_t prefix_len, int *addr_len_ptr_arg, 183 uint8_t *mac_addr_arg, uint16_t flags, vnic_ioc_diag_t *diag, 184 uint16_t vid) 185 { 186 mac_diag_t mac_diag; 187 uint16_t mac_flags = 0; 188 int err; 189 uint_t addr_len; 190 191 if (flags & VNIC_IOC_CREATE_NODUPCHECK) 192 mac_flags |= MAC_UNICAST_NODUPCHECK; 193 194 switch (vnic_addr_type) { 195 case VNIC_MAC_ADDR_TYPE_FIXED: 196 /* 197 * The MAC address value to assign to the VNIC 198 * is already provided in mac_addr_arg. addr_len_ptr_arg 199 * already contains the MAC address length. 200 */ 201 break; 202 203 case VNIC_MAC_ADDR_TYPE_RANDOM: 204 /* 205 * Random MAC address. There are two sub-cases: 206 * 207 * 1 - If mac_len == 0, a new MAC address is generated. 208 * The length of the MAC address to generated depends 209 * on the type of MAC used. The prefix to use for the MAC 210 * address is stored in the most significant bytes 211 * of the mac_addr argument, and its length is specified 212 * by the mac_prefix_len argument. This prefix can 213 * correspond to a IEEE OUI in the case of Ethernet, 214 * for example. 215 * 216 * 2 - If mac_len > 0, the address was already picked 217 * randomly, and is now passed back during VNIC 218 * re-creation. The mac_addr argument contains the MAC 219 * address that was generated. We distinguish this 220 * case from the fixed MAC address case, since we 221 * want the user consumers to know, when they query 222 * the list of VNICs, that a VNIC was assigned a 223 * random MAC address vs assigned a fixed address 224 * specified by the user. 225 */ 226 227 /* 228 * If it's a pre-generated address, we're done. mac_addr_arg 229 * and addr_len_ptr_arg already contain the MAC address 230 * value and length. 231 */ 232 if (*addr_len_ptr_arg > 0) 233 break; 234 235 /* generate a new random MAC address */ 236 if ((err = mac_addr_random(vnic->vn_mch, 237 prefix_len, mac_addr_arg, &mac_diag)) != 0) { 238 *diag = vnic_mac2vnic_diag(mac_diag); 239 return (err); 240 } 241 *addr_len_ptr_arg = mac_addr_len(vnic->vn_lower_mh); 242 break; 243 244 case VNIC_MAC_ADDR_TYPE_FACTORY: 245 err = mac_addr_factory_reserve(vnic->vn_mch, addr_slot); 246 if (err != 0) { 247 if (err == EINVAL) 248 *diag = VNIC_IOC_DIAG_MACFACTORYSLOTINVALID; 249 if (err == EBUSY) 250 *diag = VNIC_IOC_DIAG_MACFACTORYSLOTUSED; 251 if (err == ENOSPC) 252 *diag = VNIC_IOC_DIAG_MACFACTORYSLOTALLUSED; 253 return (err); 254 } 255 256 mac_addr_factory_value(vnic->vn_lower_mh, *addr_slot, 257 mac_addr_arg, &addr_len, NULL, NULL); 258 *addr_len_ptr_arg = addr_len; 259 break; 260 261 case VNIC_MAC_ADDR_TYPE_AUTO: 262 /* first try to allocate a factory MAC address */ 263 err = mac_addr_factory_reserve(vnic->vn_mch, addr_slot); 264 if (err == 0) { 265 mac_addr_factory_value(vnic->vn_lower_mh, *addr_slot, 266 mac_addr_arg, &addr_len, NULL, NULL); 267 vnic_addr_type = VNIC_MAC_ADDR_TYPE_FACTORY; 268 *addr_len_ptr_arg = addr_len; 269 break; 270 } 271 272 /* 273 * Allocating a factory MAC address failed, generate a 274 * random MAC address instead. 275 */ 276 if ((err = mac_addr_random(vnic->vn_mch, 277 prefix_len, mac_addr_arg, &mac_diag)) != 0) { 278 *diag = vnic_mac2vnic_diag(mac_diag); 279 return (err); 280 } 281 *addr_len_ptr_arg = mac_addr_len(vnic->vn_lower_mh); 282 vnic_addr_type = VNIC_MAC_ADDR_TYPE_RANDOM; 283 break; 284 case VNIC_MAC_ADDR_TYPE_PRIMARY: 285 /* 286 * We get the address here since we copy it in the 287 * vnic's vn_addr. 288 */ 289 mac_unicast_primary_get(vnic->vn_lower_mh, mac_addr_arg); 290 *addr_len_ptr_arg = mac_addr_len(vnic->vn_lower_mh); 291 mac_flags |= MAC_UNICAST_VNIC_PRIMARY; 292 break; 293 } 294 295 vnic->vn_addr_type = vnic_addr_type; 296 297 err = mac_unicast_add(vnic->vn_mch, mac_addr_arg, mac_flags, 298 &vnic->vn_muh, vid, &mac_diag); 299 if (err != 0) { 300 if (vnic_addr_type == VNIC_MAC_ADDR_TYPE_FACTORY) { 301 /* release factory MAC address */ 302 mac_addr_factory_release(vnic->vn_mch, *addr_slot); 303 } 304 *diag = vnic_mac2vnic_diag(mac_diag); 305 } 306 307 return (err); 308 } 309 310 /* 311 * Create a new VNIC upon request from administrator. 312 * Returns 0 on success, an errno on failure. 313 */ 314 /* ARGSUSED */ 315 int 316 vnic_dev_create(datalink_id_t vnic_id, datalink_id_t linkid, 317 vnic_mac_addr_type_t *vnic_addr_type, int *mac_len, uchar_t *mac_addr, 318 int *mac_slot, uint_t mac_prefix_len, uint16_t vid, 319 mac_resource_props_t *mrp, uint32_t flags, vnic_ioc_diag_t *diag) 320 { 321 vnic_t *vnic; 322 mac_register_t *mac; 323 int err; 324 boolean_t is_anchor = ((flags & VNIC_IOC_CREATE_ANCHOR) != 0); 325 char vnic_name[MAXNAMELEN]; 326 const mac_info_t *minfop; 327 uint32_t req_hwgrp_flag = ((flags & VNIC_IOC_CREATE_REQ_HWRINGS) != 0) ? 328 MAC_OPEN_FLAGS_REQ_HWRINGS : 0; 329 330 *diag = VNIC_IOC_DIAG_NONE; 331 332 rw_enter(&vnic_lock, RW_WRITER); 333 334 /* does a VNIC with the same id already exist? */ 335 err = mod_hash_find(vnic_hash, VNIC_HASH_KEY(vnic_id), 336 (mod_hash_val_t *)&vnic); 337 if (err == 0) { 338 rw_exit(&vnic_lock); 339 return (EEXIST); 340 } 341 342 vnic = kmem_cache_alloc(vnic_cache, KM_NOSLEEP); 343 if (vnic == NULL) { 344 rw_exit(&vnic_lock); 345 return (ENOMEM); 346 } 347 348 bzero(vnic, sizeof (*vnic)); 349 350 vnic->vn_id = vnic_id; 351 vnic->vn_link_id = linkid; 352 vnic->vn_started = B_FALSE; 353 354 if (!is_anchor) { 355 if (linkid == DATALINK_INVALID_LINKID) { 356 err = EINVAL; 357 goto bail; 358 } 359 360 /* 361 * Open the lower MAC and assign its initial bandwidth and 362 * MAC address. We do this here during VNIC creation and 363 * do not wait until the upper MAC client open so that we 364 * can validate the VNIC creation parameters (bandwidth, 365 * MAC address, etc) and reserve a factory MAC address if 366 * one was requested. 367 */ 368 err = mac_open_by_linkid(linkid, &vnic->vn_lower_mh); 369 if (err != 0) 370 goto bail; 371 372 /* 373 * VNIC(vlan) over VNICs(vlans) is not supported. 374 */ 375 if (mac_is_vnic(vnic->vn_lower_mh)) { 376 err = EINVAL; 377 goto bail; 378 } 379 380 /* only ethernet support for now */ 381 minfop = mac_info(vnic->vn_lower_mh); 382 if (minfop->mi_nativemedia != DL_ETHER) { 383 err = ENOTSUP; 384 goto bail; 385 } 386 387 (void) dls_mgmt_get_linkinfo(vnic_id, vnic_name, NULL, NULL, 388 NULL); 389 err = mac_client_open(vnic->vn_lower_mh, &vnic->vn_mch, 390 vnic_name, MAC_OPEN_FLAGS_IS_VNIC | req_hwgrp_flag); 391 if (err != 0) 392 goto bail; 393 394 if (mrp != NULL) { 395 err = mac_client_set_resources(vnic->vn_mch, mrp); 396 if (err != 0) 397 goto bail; 398 } 399 /* assign a MAC address to the VNIC */ 400 401 err = vnic_unicast_add(vnic, *vnic_addr_type, mac_slot, 402 mac_prefix_len, mac_len, mac_addr, flags, diag, vid); 403 if (err != 0) { 404 vnic->vn_muh = NULL; 405 if (diag != NULL && req_hwgrp_flag != 0) 406 *diag = VNIC_IOC_DIAG_NO_HWRINGS; 407 goto bail; 408 } 409 410 /* register to receive notification from underlying MAC */ 411 vnic->vn_mnh = mac_notify_add(vnic->vn_lower_mh, vnic_notify_cb, 412 vnic); 413 414 *vnic_addr_type = vnic->vn_addr_type; 415 vnic->vn_addr_len = *mac_len; 416 vnic->vn_vid = vid; 417 418 bcopy(mac_addr, vnic->vn_addr, vnic->vn_addr_len); 419 420 if (vnic->vn_addr_type == VNIC_MAC_ADDR_TYPE_FACTORY) 421 vnic->vn_slot_id = *mac_slot; 422 423 /* set the initial VNIC capabilities */ 424 if (!mac_capab_get(vnic->vn_lower_mh, MAC_CAPAB_HCKSUM, 425 &vnic->vn_hcksum_txflags)) 426 vnic->vn_hcksum_txflags = 0; 427 } 428 429 /* register with the MAC module */ 430 if ((mac = mac_alloc(MAC_VERSION)) == NULL) 431 goto bail; 432 433 mac->m_type_ident = MAC_PLUGIN_IDENT_ETHER; 434 mac->m_driver = vnic; 435 mac->m_dip = vnic_get_dip(); 436 mac->m_instance = (uint_t)-1; 437 mac->m_src_addr = vnic->vn_addr; 438 mac->m_callbacks = &vnic_m_callbacks; 439 440 if (!is_anchor) { 441 /* 442 * If this is a VNIC based VLAN, then we check for the 443 * margin unless it has been created with the force 444 * flag. If we are configuring a VLAN over an etherstub, 445 * we don't check the margin even if force is not set. 446 */ 447 if (vid == 0 || (flags & VNIC_IOC_CREATE_FORCE) != 0) { 448 if (vid != VLAN_ID_NONE) 449 vnic->vn_force = B_TRUE; 450 /* 451 * As the current margin size of the underlying mac is 452 * used to determine the margin size of the VNIC 453 * itself, request the underlying mac not to change 454 * to a smaller margin size. 455 */ 456 err = mac_margin_add(vnic->vn_lower_mh, 457 &vnic->vn_margin, B_TRUE); 458 ASSERT(err == 0); 459 } else { 460 vnic->vn_margin = VLAN_TAGSZ; 461 err = mac_margin_add(vnic->vn_lower_mh, 462 &vnic->vn_margin, B_FALSE); 463 if (err != 0) { 464 mac_free(mac); 465 if (diag != NULL) 466 *diag = VNIC_IOC_DIAG_MACMARGIN_INVALID; 467 goto bail; 468 } 469 } 470 471 mac_sdu_get(vnic->vn_lower_mh, &mac->m_min_sdu, 472 &mac->m_max_sdu); 473 } else { 474 vnic->vn_margin = VLAN_TAGSZ; 475 mac->m_min_sdu = 0; 476 mac->m_max_sdu = 9000; 477 } 478 479 mac->m_margin = vnic->vn_margin; 480 481 err = mac_register(mac, &vnic->vn_mh); 482 mac_free(mac); 483 if (err != 0) { 484 VERIFY(is_anchor || mac_margin_remove(vnic->vn_lower_mh, 485 vnic->vn_margin) == 0); 486 goto bail; 487 } 488 489 /* Set the VNIC's MAC in the client */ 490 if (!is_anchor) 491 mac_set_upper_mac(vnic->vn_mch, vnic->vn_mh); 492 493 if ((err = dls_devnet_create(vnic->vn_mh, vnic->vn_id)) != 0) { 494 VERIFY(is_anchor || mac_margin_remove(vnic->vn_lower_mh, 495 vnic->vn_margin) == 0); 496 (void) mac_unregister(vnic->vn_mh); 497 goto bail; 498 } 499 500 /* add new VNIC to hash table */ 501 err = mod_hash_insert(vnic_hash, VNIC_HASH_KEY(vnic_id), 502 (mod_hash_val_t)vnic); 503 ASSERT(err == 0); 504 vnic_count++; 505 506 rw_exit(&vnic_lock); 507 508 return (0); 509 510 bail: 511 rw_exit(&vnic_lock); 512 if (!is_anchor) { 513 if (vnic->vn_mnh != NULL) 514 (void) mac_notify_remove(vnic->vn_mnh, B_TRUE); 515 if (vnic->vn_muh != NULL) 516 (void) mac_unicast_remove(vnic->vn_mch, vnic->vn_muh); 517 if (vnic->vn_mch != NULL) 518 mac_client_close(vnic->vn_mch, MAC_CLOSE_FLAGS_IS_VNIC); 519 if (vnic->vn_lower_mh != NULL) 520 mac_close(vnic->vn_lower_mh); 521 } 522 523 kmem_cache_free(vnic_cache, vnic); 524 return (err); 525 } 526 527 /* 528 * Modify the properties of an existing VNIC. 529 */ 530 /* ARGSUSED */ 531 int 532 vnic_dev_modify(datalink_id_t vnic_id, uint_t modify_mask, 533 vnic_mac_addr_type_t mac_addr_type, uint_t mac_len, uchar_t *mac_addr, 534 uint_t mac_slot, mac_resource_props_t *mrp) 535 { 536 vnic_t *vnic = NULL; 537 538 rw_enter(&vnic_lock, RW_WRITER); 539 540 if (mod_hash_find(vnic_hash, VNIC_HASH_KEY(vnic_id), 541 (mod_hash_val_t *)&vnic) != 0) { 542 rw_exit(&vnic_lock); 543 return (ENOENT); 544 } 545 546 rw_exit(&vnic_lock); 547 548 return (0); 549 } 550 551 /* ARGSUSED */ 552 int 553 vnic_dev_delete(datalink_id_t vnic_id, uint32_t flags) 554 { 555 vnic_t *vnic = NULL; 556 mod_hash_val_t val; 557 datalink_id_t tmpid; 558 int rc; 559 560 rw_enter(&vnic_lock, RW_WRITER); 561 562 if (mod_hash_find(vnic_hash, VNIC_HASH_KEY(vnic_id), 563 (mod_hash_val_t *)&vnic) != 0) { 564 rw_exit(&vnic_lock); 565 return (ENOENT); 566 } 567 568 if ((rc = dls_devnet_destroy(vnic->vn_mh, &tmpid, B_TRUE)) != 0) { 569 rw_exit(&vnic_lock); 570 return (rc); 571 } 572 573 ASSERT(vnic_id == tmpid); 574 575 /* 576 * We cannot unregister the MAC yet. Unregistering would 577 * free up mac_impl_t which should not happen at this time. 578 * So disable mac_impl_t by calling mac_disable(). This will prevent 579 * any new claims on mac_impl_t. 580 */ 581 if ((rc = mac_disable(vnic->vn_mh)) != 0) { 582 (void) dls_devnet_create(vnic->vn_mh, vnic_id); 583 rw_exit(&vnic_lock); 584 return (rc); 585 } 586 587 (void) mod_hash_remove(vnic_hash, VNIC_HASH_KEY(vnic_id), &val); 588 ASSERT(vnic == (vnic_t *)val); 589 vnic_count--; 590 rw_exit(&vnic_lock); 591 592 /* 593 * XXX-nicolas shouldn't have a void cast here, if it's 594 * expected that the function will never fail, then we should 595 * have an ASSERT(). 596 */ 597 (void) mac_unregister(vnic->vn_mh); 598 599 if (vnic->vn_lower_mh != NULL) { 600 /* 601 * Check if MAC address for the vnic was obtained from the 602 * factory MAC addresses. If yes, release it. 603 */ 604 if (vnic->vn_addr_type == VNIC_MAC_ADDR_TYPE_FACTORY) { 605 (void) mac_addr_factory_release(vnic->vn_mch, 606 vnic->vn_slot_id); 607 } 608 (void) mac_margin_remove(vnic->vn_lower_mh, vnic->vn_margin); 609 (void) mac_notify_remove(vnic->vn_mnh, B_TRUE); 610 (void) mac_unicast_remove(vnic->vn_mch, vnic->vn_muh); 611 mac_client_close(vnic->vn_mch, MAC_CLOSE_FLAGS_IS_VNIC); 612 mac_close(vnic->vn_lower_mh); 613 } 614 615 kmem_cache_free(vnic_cache, vnic); 616 return (0); 617 } 618 619 /* ARGSUSED */ 620 mblk_t * 621 vnic_m_tx(void *arg, mblk_t *mp_chain) 622 { 623 /* 624 * This function could be invoked for an anchor VNIC when sending 625 * broadcast and multicast packets, and unicast packets which did 626 * not match any local known destination. 627 */ 628 freemsgchain(mp_chain); 629 return (NULL); 630 } 631 632 /*ARGSUSED*/ 633 static void 634 vnic_m_ioctl(void *arg, queue_t *q, mblk_t *mp) 635 { 636 miocnak(q, mp, 0, ENOTSUP); 637 } 638 639 /* 640 * This entry point cannot be passed-through, since it is invoked 641 * for the per-VNIC kstats which must be exported independently 642 * of the existence of VNIC MAC clients. 643 */ 644 static int 645 vnic_m_stat(void *arg, uint_t stat, uint64_t *val) 646 { 647 vnic_t *vnic = arg; 648 int rval = 0; 649 650 if (vnic->vn_lower_mh == NULL) { 651 /* 652 * It's an anchor VNIC, which does not have any 653 * statistics in itself. 654 */ 655 return (ENOTSUP); 656 } 657 658 /* 659 * ENOTSUP must be reported for unsupported stats, the VNIC 660 * driver reports a subset of the stats that would 661 * be returned by a real piece of hardware. 662 */ 663 664 switch (stat) { 665 case MAC_STAT_LINK_STATE: 666 case MAC_STAT_LINK_UP: 667 case MAC_STAT_PROMISC: 668 case MAC_STAT_IFSPEED: 669 case MAC_STAT_MULTIRCV: 670 case MAC_STAT_MULTIXMT: 671 case MAC_STAT_BRDCSTRCV: 672 case MAC_STAT_BRDCSTXMT: 673 case MAC_STAT_OPACKETS: 674 case MAC_STAT_OBYTES: 675 case MAC_STAT_IERRORS: 676 case MAC_STAT_OERRORS: 677 case MAC_STAT_RBYTES: 678 case MAC_STAT_IPACKETS: 679 *val = mac_client_stat_get(vnic->vn_mch, stat); 680 break; 681 default: 682 rval = ENOTSUP; 683 } 684 685 return (rval); 686 } 687 688 /* 689 * Invoked by the upper MAC to retrieve the lower MAC client handle 690 * corresponding to a VNIC. A pointer to this function is obtained 691 * by the upper MAC via capability query. 692 * 693 * XXX-nicolas Note: this currently causes all VNIC MAC clients to 694 * receive the same MAC client handle for the same VNIC. This is ok 695 * as long as we have only one VNIC MAC client which sends and 696 * receives data, but we don't currently enforce this at the MAC layer. 697 */ 698 static void * 699 vnic_mac_client_handle(void *vnic_arg) 700 { 701 vnic_t *vnic = vnic_arg; 702 703 return (vnic->vn_mch); 704 } 705 706 707 /* 708 * Return information about the specified capability. 709 */ 710 /* ARGSUSED */ 711 static boolean_t 712 vnic_m_capab_get(void *arg, mac_capab_t cap, void *cap_data) 713 { 714 vnic_t *vnic = arg; 715 716 switch (cap) { 717 case MAC_CAPAB_HCKSUM: { 718 uint32_t *hcksum_txflags = cap_data; 719 720 *hcksum_txflags = vnic->vn_hcksum_txflags & 721 (HCKSUM_INET_FULL_V4 | HCKSUM_IPHDRCKSUM | 722 HCKSUM_INET_PARTIAL); 723 break; 724 } 725 case MAC_CAPAB_VNIC: { 726 mac_capab_vnic_t *vnic_capab = cap_data; 727 728 if (vnic->vn_lower_mh == NULL) { 729 /* 730 * It's an anchor VNIC, we don't have an underlying 731 * NIC and MAC client handle. 732 */ 733 return (B_FALSE); 734 } 735 736 if (vnic_capab != NULL) { 737 vnic_capab->mcv_arg = vnic; 738 vnic_capab->mcv_mac_client_handle = 739 vnic_mac_client_handle; 740 } 741 break; 742 } 743 case MAC_CAPAB_ANCHOR_VNIC: { 744 /* since it's an anchor VNIC we don't have lower mac handle */ 745 if (vnic->vn_lower_mh == NULL) { 746 ASSERT(vnic->vn_link_id == 0); 747 return (B_TRUE); 748 } 749 return (B_FALSE); 750 } 751 case MAC_CAPAB_NO_NATIVEVLAN: 752 case MAC_CAPAB_NO_ZCOPY: 753 return (B_TRUE); 754 default: 755 return (B_FALSE); 756 } 757 return (B_TRUE); 758 } 759 760 /* ARGSUSED */ 761 static int 762 vnic_m_start(void *arg) 763 { 764 return (0); 765 } 766 767 /* ARGSUSED */ 768 static void 769 vnic_m_stop(void *arg) 770 { 771 } 772 773 /* ARGSUSED */ 774 static int 775 vnic_m_promisc(void *arg, boolean_t on) 776 { 777 return (0); 778 } 779 780 /* ARGSUSED */ 781 static int 782 vnic_m_multicst(void *arg, boolean_t add, const uint8_t *addrp) 783 { 784 return (0); 785 } 786 787 static int 788 vnic_m_unicst(void *arg, const uint8_t *macaddr) 789 { 790 vnic_t *vnic = arg; 791 792 return (mac_vnic_unicast_set(vnic->vn_mch, macaddr)); 793 } 794 795 /* 796 * Callback functions for set/get of properties 797 */ 798 /*ARGSUSED*/ 799 static int 800 vnic_m_setprop(void *m_driver, const char *pr_name, mac_prop_id_t pr_num, 801 uint_t pr_valsize, const void *pr_val) 802 { 803 int err = ENOTSUP; 804 vnic_t *vn = m_driver; 805 806 /* allow setting MTU only on an etherstub */ 807 if (vn->vn_link_id != DATALINK_INVALID_LINKID) 808 return (err); 809 810 switch (pr_num) { 811 case MAC_PROP_MTU: { 812 uint32_t mtu; 813 814 if (pr_valsize < sizeof (mtu)) { 815 err = EINVAL; 816 break; 817 } 818 bcopy(pr_val, &mtu, sizeof (mtu)); 819 err = mac_maxsdu_update(vn->vn_mh, mtu); 820 break; 821 } 822 default: 823 break; 824 } 825 return (err); 826 } 827 828 /*ARGSUSED*/ 829 static int 830 vnic_m_getprop(void *m_driver, const char *pr_name, mac_prop_id_t pr_num, 831 uint_t pr_flags, uint_t pr_valsize, void *pr_val, uint_t *perm) 832 { 833 return (ENOTSUP); 834 } 835 836 837 int 838 vnic_info(vnic_info_t *info) 839 { 840 vnic_t *vnic; 841 int err; 842 843 rw_enter(&vnic_lock, RW_WRITER); 844 845 err = mod_hash_find(vnic_hash, VNIC_HASH_KEY(info->vn_vnic_id), 846 (mod_hash_val_t *)&vnic); 847 if (err != 0) { 848 rw_exit(&vnic_lock); 849 return (ENOENT); 850 } 851 852 info->vn_link_id = vnic->vn_link_id; 853 info->vn_mac_addr_type = vnic->vn_addr_type; 854 info->vn_mac_len = vnic->vn_addr_len; 855 bcopy(vnic->vn_addr, info->vn_mac_addr, MAXMACADDRLEN); 856 info->vn_mac_slot = vnic->vn_slot_id; 857 info->vn_mac_prefix_len = 0; 858 info->vn_vid = vnic->vn_vid; 859 info->vn_force = vnic->vn_force; 860 861 bzero(&info->vn_resource_props, sizeof (mac_resource_props_t)); 862 if (vnic->vn_mch != NULL) 863 mac_resource_ctl_get(vnic->vn_mch, &info->vn_resource_props); 864 865 rw_exit(&vnic_lock); 866 return (0); 867 } 868 869 static void 870 vnic_notify_cb(void *arg, mac_notify_type_t type) 871 { 872 vnic_t *vnic = arg; 873 874 /* 875 * Only the VLAN VNIC needs to be notified with primary MAC 876 * address change. 877 */ 878 if (vnic->vn_addr_type != VNIC_MAC_ADDR_TYPE_PRIMARY) 879 return; 880 881 switch (type) { 882 case MAC_NOTE_UNICST: 883 /* the unicast MAC address value */ 884 mac_unicast_primary_get(vnic->vn_lower_mh, vnic->vn_addr); 885 886 /* notify its upper layer MAC about MAC address change */ 887 mac_unicst_update(vnic->vn_mh, (const uint8_t *)vnic->vn_addr); 888 break; 889 default: 890 break; 891 } 892 } 893