1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2007, 2009 4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, 5 * Frank Pavlic <fpavlic@de.ibm.com>, 6 * Thomas Spatzier <tspat@de.ibm.com>, 7 * Frank Blaschka <frank.blaschka@de.ibm.com> 8 */ 9 10 #define KMSG_COMPONENT "qeth" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/bitops.h> 16 #include <linux/string.h> 17 #include <linux/errno.h> 18 #include <linux/kernel.h> 19 #include <linux/etherdevice.h> 20 #include <linux/ip.h> 21 #include <linux/in.h> 22 #include <linux/ipv6.h> 23 #include <linux/inetdevice.h> 24 #include <linux/igmp.h> 25 #include <linux/slab.h> 26 #include <linux/if_ether.h> 27 #include <linux/if_vlan.h> 28 #include <linux/skbuff.h> 29 30 #include <net/ip.h> 31 #include <net/arp.h> 32 #include <net/route.h> 33 #include <net/ipv6.h> 34 #include <net/ip6_route.h> 35 #include <net/iucv/af_iucv.h> 36 #include <linux/hashtable.h> 37 38 #include "qeth_l3.h" 39 40 static int qeth_l3_register_addr_entry(struct qeth_card *, 41 struct qeth_ipaddr *); 42 static int qeth_l3_deregister_addr_entry(struct qeth_card *, 43 struct qeth_ipaddr *); 44 45 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr, 46 char *buf) 47 { 48 if (proto == QETH_PROT_IPV4) 49 return sprintf(buf, "%pI4", addr); 50 else 51 return sprintf(buf, "%pI6", addr); 52 } 53 54 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card, 55 struct qeth_ipaddr *query) 56 { 57 u32 key = qeth_l3_ipaddr_hash(query); 58 struct qeth_ipaddr *addr; 59 60 if (query->is_multicast) { 61 hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key) 62 if (qeth_l3_addr_match_ip(addr, query)) 63 return addr; 64 } else { 65 hash_for_each_possible(card->ip_htable, addr, hnode, key) 66 if (qeth_l3_addr_match_ip(addr, query)) 67 return addr; 68 } 69 return NULL; 70 } 71 72 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len) 73 { 74 int i, j; 75 u8 octet; 76 77 for (i = 0; i < len; ++i) { 78 octet = addr[i]; 79 for (j = 7; j >= 0; --j) { 80 bits[i*8 + j] = octet & 1; 81 octet >>= 1; 82 } 83 } 84 } 85 86 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card, 87 struct qeth_ipaddr *addr) 88 { 89 struct qeth_ipato_entry *ipatoe; 90 u8 addr_bits[128] = {0, }; 91 u8 ipatoe_bits[128] = {0, }; 92 int rc = 0; 93 94 if (!card->ipato.enabled) 95 return false; 96 if (addr->type != QETH_IP_TYPE_NORMAL) 97 return false; 98 99 qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits, 100 (addr->proto == QETH_PROT_IPV4) ? 4 : 16); 101 list_for_each_entry(ipatoe, &card->ipato.entries, entry) { 102 if (addr->proto != ipatoe->proto) 103 continue; 104 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits, 105 (ipatoe->proto == QETH_PROT_IPV4) ? 106 4 : 16); 107 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits); 108 if (rc) 109 break; 110 } 111 /* invert? */ 112 if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4) 113 rc = !rc; 114 else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6) 115 rc = !rc; 116 117 return rc; 118 } 119 120 static int qeth_l3_delete_ip(struct qeth_card *card, 121 struct qeth_ipaddr *tmp_addr) 122 { 123 int rc = 0; 124 struct qeth_ipaddr *addr; 125 126 if (tmp_addr->type == QETH_IP_TYPE_RXIP) 127 QETH_CARD_TEXT(card, 2, "delrxip"); 128 else if (tmp_addr->type == QETH_IP_TYPE_VIPA) 129 QETH_CARD_TEXT(card, 2, "delvipa"); 130 else 131 QETH_CARD_TEXT(card, 2, "delip"); 132 133 if (tmp_addr->proto == QETH_PROT_IPV4) 134 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4); 135 else { 136 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8); 137 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8); 138 } 139 140 addr = qeth_l3_find_addr_by_ip(card, tmp_addr); 141 if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr)) 142 return -ENOENT; 143 144 addr->ref_counter--; 145 if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0) 146 return rc; 147 148 if (qeth_card_hw_is_reachable(card)) 149 rc = qeth_l3_deregister_addr_entry(card, addr); 150 151 hash_del(&addr->hnode); 152 kfree(addr); 153 154 return rc; 155 } 156 157 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr) 158 { 159 int rc = 0; 160 struct qeth_ipaddr *addr; 161 char buf[40]; 162 163 if (tmp_addr->type == QETH_IP_TYPE_RXIP) 164 QETH_CARD_TEXT(card, 2, "addrxip"); 165 else if (tmp_addr->type == QETH_IP_TYPE_VIPA) 166 QETH_CARD_TEXT(card, 2, "addvipa"); 167 else 168 QETH_CARD_TEXT(card, 2, "addip"); 169 170 if (tmp_addr->proto == QETH_PROT_IPV4) 171 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4); 172 else { 173 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8); 174 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8); 175 } 176 177 addr = qeth_l3_find_addr_by_ip(card, tmp_addr); 178 if (addr) { 179 if (tmp_addr->type != QETH_IP_TYPE_NORMAL) 180 return -EADDRINUSE; 181 if (qeth_l3_addr_match_all(addr, tmp_addr)) { 182 addr->ref_counter++; 183 return 0; 184 } 185 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u, 186 buf); 187 dev_warn(&card->gdev->dev, 188 "Registering IP address %s failed\n", buf); 189 return -EADDRINUSE; 190 } else { 191 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL); 192 if (!addr) 193 return -ENOMEM; 194 195 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) { 196 QETH_CARD_TEXT(card, 2, "tkovaddr"); 197 addr->ipato = 1; 198 } 199 hash_add(card->ip_htable, &addr->hnode, 200 qeth_l3_ipaddr_hash(addr)); 201 202 if (!qeth_card_hw_is_reachable(card)) { 203 addr->disp_flag = QETH_DISP_ADDR_ADD; 204 return 0; 205 } 206 207 rc = qeth_l3_register_addr_entry(card, addr); 208 209 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) { 210 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 211 } else { 212 hash_del(&addr->hnode); 213 kfree(addr); 214 } 215 } 216 return rc; 217 } 218 219 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr, 220 bool add) 221 { 222 int rc; 223 224 mutex_lock(&card->ip_lock); 225 rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr); 226 mutex_unlock(&card->ip_lock); 227 228 return rc; 229 } 230 231 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card) 232 { 233 struct qeth_ipaddr *addr; 234 struct hlist_node *tmp; 235 int i; 236 237 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) { 238 hash_del(&addr->hnode); 239 kfree(addr); 240 } 241 } 242 243 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover) 244 { 245 struct qeth_ipaddr *addr; 246 struct hlist_node *tmp; 247 int i; 248 249 QETH_CARD_TEXT(card, 4, "clearip"); 250 251 mutex_lock(&card->ip_lock); 252 253 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) { 254 if (!recover) { 255 hash_del(&addr->hnode); 256 kfree(addr); 257 continue; 258 } 259 addr->disp_flag = QETH_DISP_ADDR_ADD; 260 } 261 262 mutex_unlock(&card->ip_lock); 263 } 264 265 static void qeth_l3_recover_ip(struct qeth_card *card) 266 { 267 struct qeth_ipaddr *addr; 268 struct hlist_node *tmp; 269 int i; 270 int rc; 271 272 QETH_CARD_TEXT(card, 4, "recovrip"); 273 274 mutex_lock(&card->ip_lock); 275 276 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) { 277 if (addr->disp_flag == QETH_DISP_ADDR_ADD) { 278 rc = qeth_l3_register_addr_entry(card, addr); 279 280 if (!rc) { 281 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 282 } else { 283 hash_del(&addr->hnode); 284 kfree(addr); 285 } 286 } 287 } 288 289 mutex_unlock(&card->ip_lock); 290 } 291 292 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply, 293 unsigned long data) 294 { 295 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 296 297 switch (cmd->hdr.return_code) { 298 case IPA_RC_SUCCESS: 299 return 0; 300 case IPA_RC_DUPLICATE_IP_ADDRESS: 301 return -EADDRINUSE; 302 case IPA_RC_MC_ADDR_NOT_FOUND: 303 return -ENOENT; 304 case IPA_RC_LAN_OFFLINE: 305 return -ENETDOWN; 306 default: 307 return -EIO; 308 } 309 } 310 311 static int qeth_l3_send_setdelmc(struct qeth_card *card, 312 struct qeth_ipaddr *addr, 313 enum qeth_ipa_cmds ipacmd) 314 { 315 struct qeth_cmd_buffer *iob; 316 struct qeth_ipa_cmd *cmd; 317 318 QETH_CARD_TEXT(card, 4, "setdelmc"); 319 320 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto, 321 IPA_DATA_SIZEOF(setdelipm)); 322 if (!iob) 323 return -ENOMEM; 324 cmd = __ipa_cmd(iob); 325 if (addr->proto == QETH_PROT_IPV6) { 326 cmd->data.setdelipm.ip = addr->u.a6.addr; 327 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac); 328 } else { 329 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr; 330 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac); 331 } 332 333 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL); 334 } 335 336 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len) 337 { 338 unsigned int i = 0; 339 340 while (len && i < 4) { 341 int mask_len = min_t(int, len, 32); 342 343 prefix->s6_addr32[i] = inet_make_mask(mask_len); 344 len -= mask_len; 345 i++; 346 } 347 } 348 349 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set) 350 { 351 switch (addr->type) { 352 case QETH_IP_TYPE_RXIP: 353 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0; 354 case QETH_IP_TYPE_VIPA: 355 return (set) ? QETH_IPA_SETIP_VIPA_FLAG : 356 QETH_IPA_DELIP_VIPA_FLAG; 357 default: 358 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0; 359 } 360 } 361 362 static int qeth_l3_send_setdelip(struct qeth_card *card, 363 struct qeth_ipaddr *addr, 364 enum qeth_ipa_cmds ipacmd) 365 { 366 struct qeth_cmd_buffer *iob; 367 struct qeth_ipa_cmd *cmd; 368 u32 flags; 369 370 QETH_CARD_TEXT(card, 4, "setdelip"); 371 372 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto, 373 IPA_DATA_SIZEOF(setdelip6)); 374 if (!iob) 375 return -ENOMEM; 376 cmd = __ipa_cmd(iob); 377 378 flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP); 379 QETH_CARD_TEXT_(card, 4, "flags%02X", flags); 380 381 if (addr->proto == QETH_PROT_IPV6) { 382 cmd->data.setdelip6.addr = addr->u.a6.addr; 383 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix, 384 addr->u.a6.pfxlen); 385 cmd->data.setdelip6.flags = flags; 386 } else { 387 cmd->data.setdelip4.addr = addr->u.a4.addr; 388 cmd->data.setdelip4.mask = addr->u.a4.mask; 389 cmd->data.setdelip4.flags = flags; 390 } 391 392 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL); 393 } 394 395 static int qeth_l3_send_setrouting(struct qeth_card *card, 396 enum qeth_routing_types type, enum qeth_prot_versions prot) 397 { 398 int rc; 399 struct qeth_ipa_cmd *cmd; 400 struct qeth_cmd_buffer *iob; 401 402 QETH_CARD_TEXT(card, 4, "setroutg"); 403 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot, 404 IPA_DATA_SIZEOF(setrtg)); 405 if (!iob) 406 return -ENOMEM; 407 cmd = __ipa_cmd(iob); 408 cmd->data.setrtg.type = (type); 409 rc = qeth_send_ipa_cmd(card, iob, NULL, NULL); 410 411 return rc; 412 } 413 414 static int qeth_l3_correct_routing_type(struct qeth_card *card, 415 enum qeth_routing_types *type, enum qeth_prot_versions prot) 416 { 417 if (IS_IQD(card)) { 418 switch (*type) { 419 case NO_ROUTER: 420 case PRIMARY_CONNECTOR: 421 case SECONDARY_CONNECTOR: 422 case MULTICAST_ROUTER: 423 return 0; 424 default: 425 goto out_inval; 426 } 427 } else { 428 switch (*type) { 429 case NO_ROUTER: 430 case PRIMARY_ROUTER: 431 case SECONDARY_ROUTER: 432 return 0; 433 case MULTICAST_ROUTER: 434 if (qeth_is_ipafunc_supported(card, prot, 435 IPA_OSA_MC_ROUTER)) 436 return 0; 437 goto out_inval; 438 default: 439 goto out_inval; 440 } 441 } 442 out_inval: 443 *type = NO_ROUTER; 444 return -EINVAL; 445 } 446 447 int qeth_l3_setrouting_v4(struct qeth_card *card) 448 { 449 int rc; 450 451 QETH_CARD_TEXT(card, 3, "setrtg4"); 452 453 rc = qeth_l3_correct_routing_type(card, &card->options.route4.type, 454 QETH_PROT_IPV4); 455 if (rc) 456 return rc; 457 458 rc = qeth_l3_send_setrouting(card, card->options.route4.type, 459 QETH_PROT_IPV4); 460 if (rc) { 461 card->options.route4.type = NO_ROUTER; 462 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n", 463 rc, CARD_DEVID(card)); 464 } 465 return rc; 466 } 467 468 int qeth_l3_setrouting_v6(struct qeth_card *card) 469 { 470 int rc = 0; 471 472 QETH_CARD_TEXT(card, 3, "setrtg6"); 473 474 if (!qeth_is_supported(card, IPA_IPV6)) 475 return 0; 476 rc = qeth_l3_correct_routing_type(card, &card->options.route6.type, 477 QETH_PROT_IPV6); 478 if (rc) 479 return rc; 480 481 rc = qeth_l3_send_setrouting(card, card->options.route6.type, 482 QETH_PROT_IPV6); 483 if (rc) { 484 card->options.route6.type = NO_ROUTER; 485 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n", 486 rc, CARD_DEVID(card)); 487 } 488 return rc; 489 } 490 491 /* 492 * IP address takeover related functions 493 */ 494 495 /* 496 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs. 497 * 498 * Caller must hold ip_lock. 499 */ 500 void qeth_l3_update_ipato(struct qeth_card *card) 501 { 502 struct qeth_ipaddr *addr; 503 unsigned int i; 504 505 hash_for_each(card->ip_htable, i, addr, hnode) { 506 if (addr->type != QETH_IP_TYPE_NORMAL) 507 continue; 508 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr); 509 } 510 } 511 512 static void qeth_l3_clear_ipato_list(struct qeth_card *card) 513 { 514 struct qeth_ipato_entry *ipatoe, *tmp; 515 516 mutex_lock(&card->ip_lock); 517 518 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) { 519 list_del(&ipatoe->entry); 520 kfree(ipatoe); 521 } 522 523 qeth_l3_update_ipato(card); 524 mutex_unlock(&card->ip_lock); 525 } 526 527 int qeth_l3_add_ipato_entry(struct qeth_card *card, 528 struct qeth_ipato_entry *new) 529 { 530 struct qeth_ipato_entry *ipatoe; 531 int rc = 0; 532 533 QETH_CARD_TEXT(card, 2, "addipato"); 534 535 mutex_lock(&card->ip_lock); 536 537 list_for_each_entry(ipatoe, &card->ipato.entries, entry) { 538 if (ipatoe->proto != new->proto) 539 continue; 540 if (!memcmp(ipatoe->addr, new->addr, 541 (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) && 542 (ipatoe->mask_bits == new->mask_bits)) { 543 rc = -EEXIST; 544 break; 545 } 546 } 547 548 if (!rc) { 549 list_add_tail(&new->entry, &card->ipato.entries); 550 qeth_l3_update_ipato(card); 551 } 552 553 mutex_unlock(&card->ip_lock); 554 555 return rc; 556 } 557 558 int qeth_l3_del_ipato_entry(struct qeth_card *card, 559 enum qeth_prot_versions proto, u8 *addr, 560 unsigned int mask_bits) 561 { 562 struct qeth_ipato_entry *ipatoe, *tmp; 563 int rc = -ENOENT; 564 565 QETH_CARD_TEXT(card, 2, "delipato"); 566 567 mutex_lock(&card->ip_lock); 568 569 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) { 570 if (ipatoe->proto != proto) 571 continue; 572 if (!memcmp(ipatoe->addr, addr, 573 (proto == QETH_PROT_IPV4) ? 4 : 16) && 574 (ipatoe->mask_bits == mask_bits)) { 575 list_del(&ipatoe->entry); 576 qeth_l3_update_ipato(card); 577 kfree(ipatoe); 578 rc = 0; 579 } 580 } 581 582 mutex_unlock(&card->ip_lock); 583 584 return rc; 585 } 586 587 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip, 588 enum qeth_ip_types type, 589 enum qeth_prot_versions proto) 590 { 591 struct qeth_ipaddr addr; 592 593 qeth_l3_init_ipaddr(&addr, type, proto); 594 if (proto == QETH_PROT_IPV4) 595 memcpy(&addr.u.a4.addr, ip, 4); 596 else 597 memcpy(&addr.u.a6.addr, ip, 16); 598 599 return qeth_l3_modify_ip(card, &addr, add); 600 } 601 602 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add) 603 { 604 struct qeth_ipaddr addr; 605 unsigned int i; 606 607 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6); 608 addr.u.a6.addr.s6_addr[0] = 0xfe; 609 addr.u.a6.addr.s6_addr[1] = 0x80; 610 for (i = 0; i < 8; i++) 611 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i]; 612 613 return qeth_l3_modify_ip(card, &addr, add); 614 } 615 616 static int qeth_l3_register_addr_entry(struct qeth_card *card, 617 struct qeth_ipaddr *addr) 618 { 619 char buf[50]; 620 int rc = 0; 621 int cnt = 3; 622 623 if (card->options.sniffer) 624 return 0; 625 626 if (addr->proto == QETH_PROT_IPV4) { 627 QETH_CARD_TEXT(card, 2, "setaddr4"); 628 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int)); 629 } else if (addr->proto == QETH_PROT_IPV6) { 630 QETH_CARD_TEXT(card, 2, "setaddr6"); 631 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8); 632 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8); 633 } else { 634 QETH_CARD_TEXT(card, 2, "setaddr?"); 635 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr)); 636 } 637 do { 638 if (addr->is_multicast) 639 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM); 640 else 641 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP); 642 if (rc) 643 QETH_CARD_TEXT(card, 2, "failed"); 644 } while ((--cnt > 0) && rc); 645 if (rc) { 646 QETH_CARD_TEXT(card, 2, "FAILED"); 647 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf); 648 dev_warn(&card->gdev->dev, 649 "Registering IP address %s failed\n", buf); 650 } 651 return rc; 652 } 653 654 static int qeth_l3_deregister_addr_entry(struct qeth_card *card, 655 struct qeth_ipaddr *addr) 656 { 657 int rc = 0; 658 659 if (card->options.sniffer) 660 return 0; 661 662 if (addr->proto == QETH_PROT_IPV4) { 663 QETH_CARD_TEXT(card, 2, "deladdr4"); 664 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int)); 665 } else if (addr->proto == QETH_PROT_IPV6) { 666 QETH_CARD_TEXT(card, 2, "deladdr6"); 667 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8); 668 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8); 669 } else { 670 QETH_CARD_TEXT(card, 2, "deladdr?"); 671 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr)); 672 } 673 if (addr->is_multicast) 674 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM); 675 else 676 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP); 677 if (rc) 678 QETH_CARD_TEXT(card, 2, "failed"); 679 680 return rc; 681 } 682 683 static int qeth_l3_setadapter_parms(struct qeth_card *card) 684 { 685 int rc = 0; 686 687 QETH_CARD_TEXT(card, 2, "setadprm"); 688 689 if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) { 690 rc = qeth_setadpparms_change_macaddr(card); 691 if (rc) 692 dev_warn(&card->gdev->dev, "Reading the adapter MAC" 693 " address failed\n"); 694 } 695 696 return rc; 697 } 698 699 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card) 700 { 701 int rc; 702 703 QETH_CARD_TEXT(card, 3, "ipaarp"); 704 705 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) { 706 dev_info(&card->gdev->dev, 707 "ARP processing not supported on %s!\n", 708 netdev_name(card->dev)); 709 return 0; 710 } 711 rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING, 712 IPA_CMD_ASS_START, NULL); 713 if (rc) { 714 dev_warn(&card->gdev->dev, 715 "Starting ARP processing support for %s failed\n", 716 netdev_name(card->dev)); 717 } 718 return rc; 719 } 720 721 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card) 722 { 723 int rc; 724 725 QETH_CARD_TEXT(card, 3, "stsrcmac"); 726 727 if (!qeth_is_supported(card, IPA_SOURCE_MAC)) { 728 dev_info(&card->gdev->dev, 729 "Inbound source MAC-address not supported on %s\n", 730 netdev_name(card->dev)); 731 return -EOPNOTSUPP; 732 } 733 734 rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC, 735 IPA_CMD_ASS_START, NULL); 736 if (rc) 737 dev_warn(&card->gdev->dev, 738 "Starting source MAC-address support for %s failed\n", 739 netdev_name(card->dev)); 740 return rc; 741 } 742 743 static int qeth_l3_start_ipa_vlan(struct qeth_card *card) 744 { 745 int rc = 0; 746 747 QETH_CARD_TEXT(card, 3, "strtvlan"); 748 749 if (!qeth_is_supported(card, IPA_FULL_VLAN)) { 750 dev_info(&card->gdev->dev, 751 "VLAN not supported on %s\n", netdev_name(card->dev)); 752 return -EOPNOTSUPP; 753 } 754 755 rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO, 756 IPA_CMD_ASS_START, NULL); 757 if (rc) { 758 dev_warn(&card->gdev->dev, 759 "Starting VLAN support for %s failed\n", 760 netdev_name(card->dev)); 761 } else { 762 dev_info(&card->gdev->dev, "VLAN enabled\n"); 763 } 764 return rc; 765 } 766 767 static int qeth_l3_start_ipa_multicast(struct qeth_card *card) 768 { 769 int rc; 770 771 QETH_CARD_TEXT(card, 3, "stmcast"); 772 773 if (!qeth_is_supported(card, IPA_MULTICASTING)) { 774 dev_info(&card->gdev->dev, 775 "Multicast not supported on %s\n", 776 netdev_name(card->dev)); 777 return -EOPNOTSUPP; 778 } 779 780 rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING, 781 IPA_CMD_ASS_START, NULL); 782 if (rc) { 783 dev_warn(&card->gdev->dev, 784 "Starting multicast support for %s failed\n", 785 netdev_name(card->dev)); 786 } else { 787 dev_info(&card->gdev->dev, "Multicast enabled\n"); 788 card->dev->flags |= IFF_MULTICAST; 789 } 790 return rc; 791 } 792 793 static int qeth_l3_softsetup_ipv6(struct qeth_card *card) 794 { 795 u32 ipv6_data = 3; 796 int rc; 797 798 QETH_CARD_TEXT(card, 3, "softipv6"); 799 800 if (IS_IQD(card)) 801 goto out; 802 803 rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START, 804 &ipv6_data); 805 if (rc) { 806 dev_err(&card->gdev->dev, 807 "Activating IPv6 support for %s failed\n", 808 netdev_name(card->dev)); 809 return rc; 810 } 811 rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START, 812 NULL); 813 if (rc) { 814 dev_err(&card->gdev->dev, 815 "Activating IPv6 support for %s failed\n", 816 netdev_name(card->dev)); 817 return rc; 818 } 819 rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU, 820 IPA_CMD_ASS_START, NULL); 821 if (rc) { 822 dev_warn(&card->gdev->dev, 823 "Enabling the passthrough mode for %s failed\n", 824 netdev_name(card->dev)); 825 return rc; 826 } 827 out: 828 dev_info(&card->gdev->dev, "IPV6 enabled\n"); 829 return 0; 830 } 831 832 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card) 833 { 834 QETH_CARD_TEXT(card, 3, "strtipv6"); 835 836 if (!qeth_is_supported(card, IPA_IPV6)) { 837 dev_info(&card->gdev->dev, 838 "IPv6 not supported on %s\n", netdev_name(card->dev)); 839 return 0; 840 } 841 return qeth_l3_softsetup_ipv6(card); 842 } 843 844 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card) 845 { 846 u32 filter_data = 1; 847 int rc; 848 849 QETH_CARD_TEXT(card, 3, "stbrdcst"); 850 card->info.broadcast_capable = 0; 851 if (!qeth_is_supported(card, IPA_FILTERING)) { 852 dev_info(&card->gdev->dev, 853 "Broadcast not supported on %s\n", 854 netdev_name(card->dev)); 855 rc = -EOPNOTSUPP; 856 goto out; 857 } 858 rc = qeth_send_simple_setassparms(card, IPA_FILTERING, 859 IPA_CMD_ASS_START, NULL); 860 if (rc) { 861 dev_warn(&card->gdev->dev, 862 "Enabling broadcast filtering for %s failed\n", 863 netdev_name(card->dev)); 864 goto out; 865 } 866 867 rc = qeth_send_simple_setassparms(card, IPA_FILTERING, 868 IPA_CMD_ASS_CONFIGURE, &filter_data); 869 if (rc) { 870 dev_warn(&card->gdev->dev, 871 "Setting up broadcast filtering for %s failed\n", 872 netdev_name(card->dev)); 873 goto out; 874 } 875 card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO; 876 dev_info(&card->gdev->dev, "Broadcast enabled\n"); 877 rc = qeth_send_simple_setassparms(card, IPA_FILTERING, 878 IPA_CMD_ASS_ENABLE, &filter_data); 879 if (rc) { 880 dev_warn(&card->gdev->dev, 881 "Setting up broadcast echo filtering for %s failed\n", 882 netdev_name(card->dev)); 883 goto out; 884 } 885 card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO; 886 out: 887 if (card->info.broadcast_capable) 888 card->dev->flags |= IFF_BROADCAST; 889 else 890 card->dev->flags &= ~IFF_BROADCAST; 891 return rc; 892 } 893 894 static void qeth_l3_start_ipassists(struct qeth_card *card) 895 { 896 QETH_CARD_TEXT(card, 3, "strtipas"); 897 898 qeth_l3_start_ipa_arp_processing(card); /* go on*/ 899 qeth_l3_start_ipa_source_mac(card); /* go on*/ 900 qeth_l3_start_ipa_vlan(card); /* go on*/ 901 qeth_l3_start_ipa_multicast(card); /* go on*/ 902 qeth_l3_start_ipa_ipv6(card); /* go on*/ 903 qeth_l3_start_ipa_broadcast(card); /* go on*/ 904 } 905 906 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card, 907 struct qeth_reply *reply, unsigned long data) 908 { 909 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 910 911 if (cmd->hdr.return_code) 912 return -EIO; 913 if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr)) 914 return -EADDRNOTAVAIL; 915 916 eth_hw_addr_set(card->dev, cmd->data.create_destroy_addr.mac_addr); 917 return 0; 918 } 919 920 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card) 921 { 922 int rc = 0; 923 struct qeth_cmd_buffer *iob; 924 925 QETH_CARD_TEXT(card, 2, "hsrmac"); 926 927 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6, 928 IPA_DATA_SIZEOF(create_destroy_addr)); 929 if (!iob) 930 return -ENOMEM; 931 932 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb, 933 NULL); 934 return rc; 935 } 936 937 static int qeth_l3_get_unique_id_cb(struct qeth_card *card, 938 struct qeth_reply *reply, unsigned long data) 939 { 940 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 941 u16 *uid = reply->param; 942 943 if (cmd->hdr.return_code == 0) { 944 *uid = cmd->data.create_destroy_addr.uid; 945 return 0; 946 } 947 948 dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n"); 949 return -EIO; 950 } 951 952 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid) 953 { 954 struct qeth_cmd_buffer *iob; 955 956 QETH_CARD_TEXT(card, 2, "guniqeid"); 957 958 if (!qeth_is_supported(card, IPA_IPV6)) 959 goto out; 960 961 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6, 962 IPA_DATA_SIZEOF(create_destroy_addr)); 963 if (!iob) 964 goto out; 965 966 __ipa_cmd(iob)->data.create_destroy_addr.uid = uid; 967 qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid); 968 969 out: 970 return uid; 971 } 972 973 static int 974 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply, 975 unsigned long data) 976 { 977 struct qeth_ipa_cmd *cmd; 978 __u16 rc; 979 980 QETH_CARD_TEXT(card, 2, "diastrcb"); 981 982 cmd = (struct qeth_ipa_cmd *)data; 983 rc = cmd->hdr.return_code; 984 if (rc) 985 QETH_CARD_TEXT_(card, 2, "dxter%x", rc); 986 switch (cmd->data.diagass.action) { 987 case QETH_DIAGS_CMD_TRACE_QUERY: 988 break; 989 case QETH_DIAGS_CMD_TRACE_DISABLE: 990 switch (rc) { 991 case 0: 992 case IPA_RC_INVALID_SUBCMD: 993 card->info.promisc_mode = SET_PROMISC_MODE_OFF; 994 dev_info(&card->gdev->dev, "The HiperSockets network " 995 "traffic analyzer is deactivated\n"); 996 break; 997 default: 998 break; 999 } 1000 break; 1001 case QETH_DIAGS_CMD_TRACE_ENABLE: 1002 switch (rc) { 1003 case 0: 1004 card->info.promisc_mode = SET_PROMISC_MODE_ON; 1005 dev_info(&card->gdev->dev, "The HiperSockets network " 1006 "traffic analyzer is activated\n"); 1007 break; 1008 case IPA_RC_HARDWARE_AUTH_ERROR: 1009 dev_warn(&card->gdev->dev, "The device is not " 1010 "authorized to run as a HiperSockets network " 1011 "traffic analyzer\n"); 1012 break; 1013 case IPA_RC_TRACE_ALREADY_ACTIVE: 1014 dev_warn(&card->gdev->dev, "A HiperSockets " 1015 "network traffic analyzer is already " 1016 "active in the HiperSockets LAN\n"); 1017 break; 1018 default: 1019 break; 1020 } 1021 break; 1022 default: 1023 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n", 1024 cmd->data.diagass.action, CARD_DEVID(card)); 1025 } 1026 1027 return rc ? -EIO : 0; 1028 } 1029 1030 static int 1031 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd) 1032 { 1033 struct qeth_cmd_buffer *iob; 1034 struct qeth_ipa_cmd *cmd; 1035 1036 QETH_CARD_TEXT(card, 2, "diagtrac"); 1037 1038 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0); 1039 if (!iob) 1040 return -ENOMEM; 1041 cmd = __ipa_cmd(iob); 1042 cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET; 1043 cmd->data.diagass.action = diags_cmd; 1044 return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL); 1045 } 1046 1047 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg) 1048 { 1049 struct qeth_card *card = arg; 1050 struct inet6_dev *in6_dev; 1051 struct in_device *in4_dev; 1052 struct qeth_ipaddr *ipm; 1053 struct qeth_ipaddr tmp; 1054 struct ip_mc_list *im4; 1055 struct ifmcaddr6 *im6; 1056 1057 QETH_CARD_TEXT(card, 4, "addmc"); 1058 1059 if (!dev || !(dev->flags & IFF_UP)) 1060 goto out; 1061 1062 in4_dev = __in_dev_get_rtnl(dev); 1063 if (!in4_dev) 1064 goto walk_ipv6; 1065 1066 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4); 1067 tmp.disp_flag = QETH_DISP_ADDR_ADD; 1068 tmp.is_multicast = 1; 1069 1070 for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL; 1071 im4 = rtnl_dereference(im4->next_rcu)) { 1072 tmp.u.a4.addr = im4->multiaddr; 1073 1074 ipm = qeth_l3_find_addr_by_ip(card, &tmp); 1075 if (ipm) { 1076 /* for mcast, by-IP match means full match */ 1077 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 1078 continue; 1079 } 1080 1081 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL); 1082 if (!ipm) 1083 continue; 1084 1085 hash_add(card->rx_mode_addrs, &ipm->hnode, 1086 qeth_l3_ipaddr_hash(ipm)); 1087 } 1088 1089 walk_ipv6: 1090 if (!qeth_is_supported(card, IPA_IPV6)) 1091 goto out; 1092 1093 in6_dev = __in6_dev_get(dev); 1094 if (!in6_dev) 1095 goto out; 1096 1097 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6); 1098 tmp.disp_flag = QETH_DISP_ADDR_ADD; 1099 tmp.is_multicast = 1; 1100 1101 for (im6 = rtnl_dereference(in6_dev->mc_list); 1102 im6; 1103 im6 = rtnl_dereference(im6->next)) { 1104 tmp.u.a6.addr = im6->mca_addr; 1105 1106 ipm = qeth_l3_find_addr_by_ip(card, &tmp); 1107 if (ipm) { 1108 /* for mcast, by-IP match means full match */ 1109 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING; 1110 continue; 1111 } 1112 1113 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC); 1114 if (!ipm) 1115 continue; 1116 1117 hash_add(card->rx_mode_addrs, &ipm->hnode, 1118 qeth_l3_ipaddr_hash(ipm)); 1119 1120 } 1121 1122 out: 1123 return 0; 1124 } 1125 1126 static void qeth_l3_set_promisc_mode(struct qeth_card *card) 1127 { 1128 bool enable = card->dev->flags & IFF_PROMISC; 1129 1130 if (card->info.promisc_mode == enable) 1131 return; 1132 1133 if (IS_VM_NIC(card)) { /* Guestlan trace */ 1134 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) 1135 qeth_setadp_promisc_mode(card, enable); 1136 } else if (card->options.sniffer && /* HiperSockets trace */ 1137 qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) { 1138 if (enable) { 1139 QETH_CARD_TEXT(card, 3, "+promisc"); 1140 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE); 1141 } else { 1142 QETH_CARD_TEXT(card, 3, "-promisc"); 1143 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE); 1144 } 1145 } 1146 } 1147 1148 static void qeth_l3_rx_mode_work(struct work_struct *work) 1149 { 1150 struct qeth_card *card = container_of(work, struct qeth_card, 1151 rx_mode_work); 1152 struct qeth_ipaddr *addr; 1153 struct hlist_node *tmp; 1154 int i, rc; 1155 1156 QETH_CARD_TEXT(card, 3, "setmulti"); 1157 1158 if (!card->options.sniffer) { 1159 rtnl_lock(); 1160 qeth_l3_add_mcast_rtnl(card->dev, 0, card); 1161 if (qeth_is_supported(card, IPA_FULL_VLAN)) 1162 vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card); 1163 rtnl_unlock(); 1164 1165 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) { 1166 switch (addr->disp_flag) { 1167 case QETH_DISP_ADDR_DELETE: 1168 rc = qeth_l3_deregister_addr_entry(card, addr); 1169 if (!rc || rc == -ENOENT) { 1170 hash_del(&addr->hnode); 1171 kfree(addr); 1172 } 1173 break; 1174 case QETH_DISP_ADDR_ADD: 1175 rc = qeth_l3_register_addr_entry(card, addr); 1176 if (rc && rc != -ENETDOWN) { 1177 hash_del(&addr->hnode); 1178 kfree(addr); 1179 break; 1180 } 1181 fallthrough; 1182 default: 1183 /* for next call to set_rx_mode(): */ 1184 addr->disp_flag = QETH_DISP_ADDR_DELETE; 1185 } 1186 } 1187 } 1188 1189 qeth_l3_set_promisc_mode(card); 1190 } 1191 1192 static int qeth_l3_arp_makerc(u16 rc) 1193 { 1194 switch (rc) { 1195 case IPA_RC_SUCCESS: 1196 return 0; 1197 case QETH_IPA_ARP_RC_NOTSUPP: 1198 case QETH_IPA_ARP_RC_Q_NOTSUPP: 1199 return -EOPNOTSUPP; 1200 case QETH_IPA_ARP_RC_OUT_OF_RANGE: 1201 return -EINVAL; 1202 case QETH_IPA_ARP_RC_Q_NO_DATA: 1203 return -ENOENT; 1204 default: 1205 return -EIO; 1206 } 1207 } 1208 1209 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply, 1210 unsigned long data) 1211 { 1212 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; 1213 1214 qeth_setassparms_cb(card, reply, data); 1215 return qeth_l3_arp_makerc(cmd->hdr.return_code); 1216 } 1217 1218 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries) 1219 { 1220 struct qeth_cmd_buffer *iob; 1221 int rc; 1222 1223 QETH_CARD_TEXT(card, 3, "arpstnoe"); 1224 1225 /* 1226 * currently GuestLAN only supports the ARP assist function 1227 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES; 1228 * thus we say EOPNOTSUPP for this ARP function 1229 */ 1230 if (IS_VM_NIC(card)) 1231 return -EOPNOTSUPP; 1232 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) { 1233 return -EOPNOTSUPP; 1234 } 1235 1236 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, 1237 IPA_CMD_ASS_ARP_SET_NO_ENTRIES, 1238 SETASS_DATA_SIZEOF(flags_32bit), 1239 QETH_PROT_IPV4); 1240 if (!iob) 1241 return -ENOMEM; 1242 1243 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries; 1244 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL); 1245 if (rc) 1246 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n", 1247 CARD_DEVID(card), rc); 1248 return rc; 1249 } 1250 1251 static __u32 get_arp_entry_size(struct qeth_card *card, 1252 struct qeth_arp_query_data *qdata, 1253 struct qeth_arp_entrytype *type, __u8 strip_entries) 1254 { 1255 __u32 rc; 1256 __u8 is_hsi; 1257 1258 is_hsi = qdata->reply_bits == 5; 1259 if (type->ip == QETHARP_IP_ADDR_V4) { 1260 QETH_CARD_TEXT(card, 4, "arpev4"); 1261 if (strip_entries) { 1262 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) : 1263 sizeof(struct qeth_arp_qi_entry7_short); 1264 } else { 1265 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) : 1266 sizeof(struct qeth_arp_qi_entry7); 1267 } 1268 } else if (type->ip == QETHARP_IP_ADDR_V6) { 1269 QETH_CARD_TEXT(card, 4, "arpev6"); 1270 if (strip_entries) { 1271 rc = is_hsi ? 1272 sizeof(struct qeth_arp_qi_entry5_short_ipv6) : 1273 sizeof(struct qeth_arp_qi_entry7_short_ipv6); 1274 } else { 1275 rc = is_hsi ? 1276 sizeof(struct qeth_arp_qi_entry5_ipv6) : 1277 sizeof(struct qeth_arp_qi_entry7_ipv6); 1278 } 1279 } else { 1280 QETH_CARD_TEXT(card, 4, "arpinv"); 1281 rc = 0; 1282 } 1283 1284 return rc; 1285 } 1286 1287 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot) 1288 { 1289 return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) || 1290 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6); 1291 } 1292 1293 static int qeth_l3_arp_query_cb(struct qeth_card *card, 1294 struct qeth_reply *reply, unsigned long data) 1295 { 1296 struct qeth_ipa_cmd *cmd; 1297 struct qeth_arp_query_data *qdata; 1298 struct qeth_arp_query_info *qinfo; 1299 int e; 1300 int entrybytes_done; 1301 int stripped_bytes; 1302 __u8 do_strip_entries; 1303 1304 QETH_CARD_TEXT(card, 3, "arpquecb"); 1305 1306 qinfo = (struct qeth_arp_query_info *) reply->param; 1307 cmd = (struct qeth_ipa_cmd *) data; 1308 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version); 1309 if (cmd->hdr.return_code) { 1310 QETH_CARD_TEXT(card, 4, "arpcberr"); 1311 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code); 1312 return qeth_l3_arp_makerc(cmd->hdr.return_code); 1313 } 1314 if (cmd->data.setassparms.hdr.return_code) { 1315 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; 1316 QETH_CARD_TEXT(card, 4, "setaperr"); 1317 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code); 1318 return qeth_l3_arp_makerc(cmd->hdr.return_code); 1319 } 1320 qdata = &cmd->data.setassparms.data.query_arp; 1321 QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries); 1322 1323 do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0; 1324 stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0; 1325 entrybytes_done = 0; 1326 for (e = 0; e < qdata->no_entries; ++e) { 1327 char *cur_entry; 1328 __u32 esize; 1329 struct qeth_arp_entrytype *etype; 1330 1331 cur_entry = &qdata->data + entrybytes_done; 1332 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type; 1333 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) { 1334 QETH_CARD_TEXT(card, 4, "pmis"); 1335 QETH_CARD_TEXT_(card, 4, "%i", etype->ip); 1336 break; 1337 } 1338 esize = get_arp_entry_size(card, qdata, etype, 1339 do_strip_entries); 1340 QETH_CARD_TEXT_(card, 5, "esz%i", esize); 1341 if (!esize) 1342 break; 1343 1344 if ((qinfo->udata_len - qinfo->udata_offset) < esize) { 1345 QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC); 1346 memset(qinfo->udata, 0, 4); 1347 return -ENOSPC; 1348 } 1349 1350 memcpy(qinfo->udata + qinfo->udata_offset, 1351 &qdata->data + entrybytes_done + stripped_bytes, 1352 esize); 1353 entrybytes_done += esize + stripped_bytes; 1354 qinfo->udata_offset += esize; 1355 ++qinfo->no_entries; 1356 } 1357 /* check if all replies received ... */ 1358 if (cmd->data.setassparms.hdr.seq_no < 1359 cmd->data.setassparms.hdr.number_of_replies) 1360 return 1; 1361 QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries); 1362 memcpy(qinfo->udata, &qinfo->no_entries, 4); 1363 /* keep STRIP_ENTRIES flag so the user program can distinguish 1364 * stripped entries from normal ones */ 1365 if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) 1366 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES; 1367 memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2); 1368 QETH_CARD_TEXT_(card, 4, "rc%i", 0); 1369 return 0; 1370 } 1371 1372 static int qeth_l3_query_arp_cache_info(struct qeth_card *card, 1373 enum qeth_prot_versions prot, 1374 struct qeth_arp_query_info *qinfo) 1375 { 1376 struct qeth_cmd_buffer *iob; 1377 struct qeth_ipa_cmd *cmd; 1378 int rc; 1379 1380 QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot); 1381 1382 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, 1383 IPA_CMD_ASS_ARP_QUERY_INFO, 1384 SETASS_DATA_SIZEOF(query_arp), prot); 1385 if (!iob) 1386 return -ENOMEM; 1387 cmd = __ipa_cmd(iob); 1388 cmd->data.setassparms.data.query_arp.request_bits = 0x000F; 1389 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo); 1390 if (rc) 1391 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n", 1392 CARD_DEVID(card), rc); 1393 return rc; 1394 } 1395 1396 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata) 1397 { 1398 struct qeth_arp_query_info qinfo = {0, }; 1399 int rc; 1400 1401 QETH_CARD_TEXT(card, 3, "arpquery"); 1402 1403 if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/ 1404 IPA_ARP_PROCESSING)) { 1405 QETH_CARD_TEXT(card, 3, "arpqnsup"); 1406 rc = -EOPNOTSUPP; 1407 goto out; 1408 } 1409 /* get size of userspace buffer and mask_bits -> 6 bytes */ 1410 if (copy_from_user(&qinfo, udata, 6)) { 1411 rc = -EFAULT; 1412 goto out; 1413 } 1414 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL); 1415 if (!qinfo.udata) { 1416 rc = -ENOMEM; 1417 goto out; 1418 } 1419 qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET; 1420 rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo); 1421 if (rc) { 1422 if (copy_to_user(udata, qinfo.udata, 4)) 1423 rc = -EFAULT; 1424 goto free_and_out; 1425 } 1426 if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) { 1427 /* fails in case of GuestLAN QDIO mode */ 1428 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo); 1429 } 1430 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) { 1431 QETH_CARD_TEXT(card, 4, "qactf"); 1432 rc = -EFAULT; 1433 goto free_and_out; 1434 } 1435 QETH_CARD_TEXT(card, 4, "qacts"); 1436 1437 free_and_out: 1438 kfree(qinfo.udata); 1439 out: 1440 return rc; 1441 } 1442 1443 static int qeth_l3_arp_modify_entry(struct qeth_card *card, 1444 struct qeth_arp_cache_entry *entry, 1445 enum qeth_arp_process_subcmds arp_cmd) 1446 { 1447 struct qeth_arp_cache_entry *cmd_entry; 1448 struct qeth_cmd_buffer *iob; 1449 int rc; 1450 1451 if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY) 1452 QETH_CARD_TEXT(card, 3, "arpadd"); 1453 else 1454 QETH_CARD_TEXT(card, 3, "arpdel"); 1455 1456 /* 1457 * currently GuestLAN only supports the ARP assist function 1458 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY; 1459 * thus we say EOPNOTSUPP for this ARP function 1460 */ 1461 if (IS_VM_NIC(card)) 1462 return -EOPNOTSUPP; 1463 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) { 1464 return -EOPNOTSUPP; 1465 } 1466 1467 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd, 1468 SETASS_DATA_SIZEOF(arp_entry), 1469 QETH_PROT_IPV4); 1470 if (!iob) 1471 return -ENOMEM; 1472 1473 cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry; 1474 ether_addr_copy(cmd_entry->macaddr, entry->macaddr); 1475 memcpy(cmd_entry->ipaddr, entry->ipaddr, 4); 1476 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL); 1477 if (rc) 1478 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n", 1479 arp_cmd, CARD_DEVID(card), rc); 1480 return rc; 1481 } 1482 1483 static int qeth_l3_arp_flush_cache(struct qeth_card *card) 1484 { 1485 struct qeth_cmd_buffer *iob; 1486 int rc; 1487 1488 QETH_CARD_TEXT(card, 3, "arpflush"); 1489 1490 /* 1491 * currently GuestLAN only supports the ARP assist function 1492 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE; 1493 * thus we say EOPNOTSUPP for this ARP function 1494 */ 1495 if (IS_VM_NIC(card) || IS_IQD(card)) 1496 return -EOPNOTSUPP; 1497 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) { 1498 return -EOPNOTSUPP; 1499 } 1500 1501 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, 1502 IPA_CMD_ASS_ARP_FLUSH_CACHE, 0, 1503 QETH_PROT_IPV4); 1504 if (!iob) 1505 return -ENOMEM; 1506 1507 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL); 1508 if (rc) 1509 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n", 1510 CARD_DEVID(card), rc); 1511 return rc; 1512 } 1513 1514 static int qeth_l3_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq, 1515 void __user *data, int cmd) 1516 { 1517 struct qeth_card *card = dev->ml_priv; 1518 struct qeth_arp_cache_entry arp_entry; 1519 enum qeth_arp_process_subcmds arp_cmd; 1520 int rc = 0; 1521 1522 switch (cmd) { 1523 case SIOC_QETH_ARP_SET_NO_ENTRIES: 1524 if (!capable(CAP_NET_ADMIN)) { 1525 rc = -EPERM; 1526 break; 1527 } 1528 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue); 1529 break; 1530 case SIOC_QETH_ARP_QUERY_INFO: 1531 if (!capable(CAP_NET_ADMIN)) { 1532 rc = -EPERM; 1533 break; 1534 } 1535 rc = qeth_l3_arp_query(card, data); 1536 break; 1537 case SIOC_QETH_ARP_ADD_ENTRY: 1538 case SIOC_QETH_ARP_REMOVE_ENTRY: 1539 if (!capable(CAP_NET_ADMIN)) 1540 return -EPERM; 1541 if (copy_from_user(&arp_entry, data, sizeof(arp_entry))) 1542 return -EFAULT; 1543 1544 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ? 1545 IPA_CMD_ASS_ARP_ADD_ENTRY : 1546 IPA_CMD_ASS_ARP_REMOVE_ENTRY; 1547 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd); 1548 case SIOC_QETH_ARP_FLUSH_CACHE: 1549 if (!capable(CAP_NET_ADMIN)) { 1550 rc = -EPERM; 1551 break; 1552 } 1553 rc = qeth_l3_arp_flush_cache(card); 1554 break; 1555 default: 1556 rc = qeth_siocdevprivate(dev, rq, data, cmd); 1557 } 1558 return rc; 1559 } 1560 1561 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst, 1562 __be16 proto) 1563 { 1564 struct neighbour *n = NULL; 1565 1566 if (dst) 1567 n = dst_neigh_lookup_skb(dst, skb); 1568 1569 if (n) { 1570 int cast_type = n->type; 1571 1572 neigh_release(n); 1573 if ((cast_type == RTN_BROADCAST) || 1574 (cast_type == RTN_MULTICAST) || 1575 (cast_type == RTN_ANYCAST)) 1576 return cast_type; 1577 return RTN_UNICAST; 1578 } 1579 1580 /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */ 1581 switch (proto) { 1582 case htons(ETH_P_IP): 1583 if (ipv4_is_lbcast(ip_hdr(skb)->daddr)) 1584 return RTN_BROADCAST; 1585 return ipv4_is_multicast(ip_hdr(skb)->daddr) ? 1586 RTN_MULTICAST : RTN_UNICAST; 1587 case htons(ETH_P_IPV6): 1588 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ? 1589 RTN_MULTICAST : RTN_UNICAST; 1590 case htons(ETH_P_AF_IUCV): 1591 return RTN_UNICAST; 1592 default: 1593 /* OSA only: ... and MAC address */ 1594 return qeth_get_ether_cast_type(skb); 1595 } 1596 } 1597 1598 static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto) 1599 { 1600 struct dst_entry *dst; 1601 int cast_type; 1602 1603 rcu_read_lock(); 1604 dst = qeth_dst_check_rcu(skb, proto); 1605 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto); 1606 rcu_read_unlock(); 1607 1608 return cast_type; 1609 } 1610 1611 static u8 qeth_l3_cast_type_to_flag(int cast_type) 1612 { 1613 if (cast_type == RTN_MULTICAST) 1614 return QETH_CAST_MULTICAST; 1615 if (cast_type == RTN_ANYCAST) 1616 return QETH_CAST_ANYCAST; 1617 if (cast_type == RTN_BROADCAST) 1618 return QETH_CAST_BROADCAST; 1619 return QETH_CAST_UNICAST; 1620 } 1621 1622 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue, 1623 struct qeth_hdr *hdr, struct sk_buff *skb, 1624 __be16 proto, unsigned int data_len) 1625 { 1626 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3; 1627 struct vlan_ethhdr *veth = vlan_eth_hdr(skb); 1628 struct qeth_card *card = queue->card; 1629 struct dst_entry *dst; 1630 int cast_type; 1631 1632 hdr->hdr.l3.length = data_len; 1633 1634 if (skb_is_gso(skb)) { 1635 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO; 1636 } else { 1637 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3; 1638 1639 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1640 qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto); 1641 /* some HW requires combined L3+L4 csum offload: */ 1642 if (proto == htons(ETH_P_IP)) 1643 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ; 1644 } 1645 } 1646 1647 if (proto == htons(ETH_P_IP) || IS_IQD(card)) { 1648 /* NETIF_F_HW_VLAN_CTAG_TX */ 1649 if (skb_vlan_tag_present(skb)) { 1650 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME; 1651 hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb); 1652 } 1653 } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) { 1654 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG; 1655 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI); 1656 } 1657 1658 rcu_read_lock(); 1659 dst = qeth_dst_check_rcu(skb, proto); 1660 1661 if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ) 1662 cast_type = RTN_UNICAST; 1663 else 1664 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto); 1665 l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type); 1666 1667 switch (proto) { 1668 case htons(ETH_P_IP): 1669 l3_hdr->next_hop.addr.s6_addr32[3] = 1670 qeth_next_hop_v4_rcu(skb, dst); 1671 break; 1672 case htons(ETH_P_IPV6): 1673 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst); 1674 1675 hdr->hdr.l3.flags |= QETH_HDR_IPV6; 1676 if (!IS_IQD(card)) 1677 hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU; 1678 break; 1679 case htons(ETH_P_AF_IUCV): 1680 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80); 1681 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2], 1682 iucv_trans_hdr(skb)->destUserID, 8); 1683 l3_hdr->flags |= QETH_HDR_IPV6; 1684 break; 1685 default: 1686 /* OSA only: */ 1687 l3_hdr->flags |= QETH_HDR_PASSTHRU; 1688 } 1689 rcu_read_unlock(); 1690 } 1691 1692 static void qeth_l3_fixup_headers(struct sk_buff *skb) 1693 { 1694 struct iphdr *iph = ip_hdr(skb); 1695 1696 /* this is safe, IPv6 traffic takes a different path */ 1697 if (skb->ip_summed == CHECKSUM_PARTIAL) 1698 iph->check = 0; 1699 if (skb_is_gso(skb)) { 1700 iph->tot_len = 0; 1701 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr, 1702 iph->daddr, 0); 1703 } 1704 } 1705 1706 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb, 1707 struct qeth_qdio_out_q *queue, __be16 proto) 1708 { 1709 unsigned int hw_hdr_len; 1710 int rc; 1711 1712 /* re-use the L2 header area for the HW header: */ 1713 hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) : 1714 sizeof(struct qeth_hdr); 1715 rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN); 1716 if (rc) 1717 return rc; 1718 skb_pull(skb, ETH_HLEN); 1719 1720 qeth_l3_fixup_headers(skb); 1721 return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header); 1722 } 1723 1724 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb, 1725 struct net_device *dev) 1726 { 1727 struct qeth_card *card = dev->ml_priv; 1728 __be16 proto = vlan_get_protocol(skb); 1729 u16 txq = skb_get_queue_mapping(skb); 1730 struct qeth_qdio_out_q *queue; 1731 int rc; 1732 1733 if (!skb_is_gso(skb)) 1734 qdisc_skb_cb(skb)->pkt_len = skb->len; 1735 if (IS_IQD(card)) { 1736 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)]; 1737 1738 if (card->options.sniffer) 1739 goto tx_drop; 1740 1741 switch (proto) { 1742 case htons(ETH_P_AF_IUCV): 1743 if (card->options.cq != QETH_CQ_ENABLED) 1744 goto tx_drop; 1745 break; 1746 case htons(ETH_P_IP): 1747 case htons(ETH_P_IPV6): 1748 if (card->options.cq == QETH_CQ_ENABLED) 1749 goto tx_drop; 1750 break; 1751 default: 1752 goto tx_drop; 1753 } 1754 } else { 1755 queue = card->qdio.out_qs[txq]; 1756 } 1757 1758 if (!(dev->flags & IFF_BROADCAST) && 1759 qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST) 1760 goto tx_drop; 1761 1762 if (proto == htons(ETH_P_IP) || IS_IQD(card)) 1763 rc = qeth_l3_xmit(card, skb, queue, proto); 1764 else 1765 rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header); 1766 1767 if (!rc) 1768 return NETDEV_TX_OK; 1769 1770 tx_drop: 1771 QETH_TXQ_STAT_INC(queue, tx_dropped); 1772 kfree_skb(skb); 1773 return NETDEV_TX_OK; 1774 } 1775 1776 static void qeth_l3_set_rx_mode(struct net_device *dev) 1777 { 1778 struct qeth_card *card = dev->ml_priv; 1779 1780 schedule_work(&card->rx_mode_work); 1781 } 1782 1783 /* 1784 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting 1785 * NOARP on the netdevice is no option because it also turns off neighbor 1786 * solicitation. For IPv4 we install a neighbor_setup function. We don't want 1787 * arp resolution but we want the hard header (packet socket will work 1788 * e.g. tcpdump) 1789 */ 1790 static int qeth_l3_neigh_setup_noarp(struct neighbour *n) 1791 { 1792 n->nud_state = NUD_NOARP; 1793 memcpy(n->ha, "FAKELL", 6); 1794 n->output = n->ops->connected_output; 1795 return 0; 1796 } 1797 1798 static int 1799 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np) 1800 { 1801 if (np->tbl->family == AF_INET) 1802 np->neigh_setup = qeth_l3_neigh_setup_noarp; 1803 1804 return 0; 1805 } 1806 1807 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb, 1808 struct net_device *dev, 1809 netdev_features_t features) 1810 { 1811 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1812 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 1813 return qeth_features_check(skb, dev, features); 1814 } 1815 1816 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb, 1817 struct net_device *sb_dev) 1818 { 1819 __be16 proto = vlan_get_protocol(skb); 1820 1821 return qeth_iqd_select_queue(dev, skb, 1822 qeth_l3_get_cast_type(skb, proto), sb_dev); 1823 } 1824 1825 static const struct net_device_ops qeth_l3_netdev_ops = { 1826 .ndo_open = qeth_open, 1827 .ndo_stop = qeth_stop, 1828 .ndo_get_stats64 = qeth_get_stats64, 1829 .ndo_start_xmit = qeth_l3_hard_start_xmit, 1830 .ndo_select_queue = qeth_l3_iqd_select_queue, 1831 .ndo_validate_addr = eth_validate_addr, 1832 .ndo_set_rx_mode = qeth_l3_set_rx_mode, 1833 .ndo_eth_ioctl = qeth_do_ioctl, 1834 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate, 1835 .ndo_fix_features = qeth_fix_features, 1836 .ndo_set_features = qeth_set_features, 1837 .ndo_tx_timeout = qeth_tx_timeout, 1838 }; 1839 1840 static const struct net_device_ops qeth_l3_osa_netdev_ops = { 1841 .ndo_open = qeth_open, 1842 .ndo_stop = qeth_stop, 1843 .ndo_get_stats64 = qeth_get_stats64, 1844 .ndo_start_xmit = qeth_l3_hard_start_xmit, 1845 .ndo_features_check = qeth_l3_osa_features_check, 1846 .ndo_select_queue = qeth_osa_select_queue, 1847 .ndo_validate_addr = eth_validate_addr, 1848 .ndo_set_rx_mode = qeth_l3_set_rx_mode, 1849 .ndo_eth_ioctl = qeth_do_ioctl, 1850 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate, 1851 .ndo_fix_features = qeth_fix_features, 1852 .ndo_set_features = qeth_set_features, 1853 .ndo_tx_timeout = qeth_tx_timeout, 1854 .ndo_neigh_setup = qeth_l3_neigh_setup, 1855 }; 1856 1857 static int qeth_l3_setup_netdev(struct qeth_card *card) 1858 { 1859 struct net_device *dev = card->dev; 1860 unsigned int headroom; 1861 int rc; 1862 1863 if (IS_OSD(card) || IS_OSX(card)) { 1864 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops; 1865 1866 /*IPv6 address autoconfiguration stuff*/ 1867 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id); 1868 1869 if (!IS_VM_NIC(card)) { 1870 card->dev->features |= NETIF_F_SG; 1871 card->dev->hw_features |= NETIF_F_TSO | 1872 NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 1873 card->dev->vlan_features |= NETIF_F_TSO | 1874 NETIF_F_RXCSUM | NETIF_F_IP_CSUM; 1875 } 1876 1877 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) { 1878 card->dev->hw_features |= NETIF_F_IPV6_CSUM; 1879 card->dev->vlan_features |= NETIF_F_IPV6_CSUM; 1880 } 1881 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) { 1882 card->dev->hw_features |= NETIF_F_TSO6; 1883 card->dev->vlan_features |= NETIF_F_TSO6; 1884 } 1885 1886 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */ 1887 if (card->dev->hw_features & NETIF_F_TSO6) 1888 headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN; 1889 else if (card->dev->hw_features & NETIF_F_TSO) 1890 headroom = sizeof(struct qeth_hdr_tso); 1891 else 1892 headroom = sizeof(struct qeth_hdr) + VLAN_HLEN; 1893 } else if (IS_IQD(card)) { 1894 card->dev->flags |= IFF_NOARP; 1895 card->dev->netdev_ops = &qeth_l3_netdev_ops; 1896 headroom = sizeof(struct qeth_hdr) - ETH_HLEN; 1897 1898 rc = qeth_l3_iqd_read_initial_mac(card); 1899 if (rc) 1900 return rc; 1901 } else 1902 return -ENODEV; 1903 1904 card->dev->needed_headroom = headroom; 1905 card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX | 1906 NETIF_F_HW_VLAN_CTAG_RX; 1907 1908 netif_keep_dst(card->dev); 1909 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) 1910 netif_set_gso_max_size(card->dev, 1911 PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1)); 1912 1913 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT); 1914 return register_netdev(card->dev); 1915 } 1916 1917 static const struct device_type qeth_l3_devtype = { 1918 .name = "qeth_layer3", 1919 .groups = qeth_l3_attr_groups, 1920 }; 1921 1922 static int qeth_l3_probe_device(struct ccwgroup_device *gdev) 1923 { 1924 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1925 int rc; 1926 1927 hash_init(card->ip_htable); 1928 mutex_init(&card->ip_lock); 1929 card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0, 1930 dev_name(&gdev->dev)); 1931 if (!card->cmd_wq) 1932 return -ENOMEM; 1933 1934 if (gdev->dev.type) { 1935 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups); 1936 if (rc) { 1937 destroy_workqueue(card->cmd_wq); 1938 return rc; 1939 } 1940 } else { 1941 gdev->dev.type = &qeth_l3_devtype; 1942 } 1943 1944 INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work); 1945 return 0; 1946 } 1947 1948 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev) 1949 { 1950 struct qeth_card *card = dev_get_drvdata(&cgdev->dev); 1951 1952 if (cgdev->dev.type != &qeth_l3_devtype) 1953 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups); 1954 1955 qeth_set_allowed_threads(card, 0, 1); 1956 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); 1957 1958 if (cgdev->state == CCWGROUP_ONLINE) 1959 qeth_set_offline(card, card->discipline, false); 1960 1961 if (card->dev->reg_state == NETREG_REGISTERED) 1962 unregister_netdev(card->dev); 1963 1964 flush_workqueue(card->cmd_wq); 1965 destroy_workqueue(card->cmd_wq); 1966 qeth_l3_clear_ip_htable(card, 0); 1967 qeth_l3_clear_ipato_list(card); 1968 } 1969 1970 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok) 1971 { 1972 struct net_device *dev = card->dev; 1973 int rc = 0; 1974 1975 /* softsetup */ 1976 QETH_CARD_TEXT(card, 2, "softsetp"); 1977 1978 rc = qeth_l3_setadapter_parms(card); 1979 if (rc) 1980 QETH_CARD_TEXT_(card, 2, "2err%04x", rc); 1981 if (!card->options.sniffer) { 1982 qeth_l3_start_ipassists(card); 1983 1984 rc = qeth_l3_setrouting_v4(card); 1985 if (rc) 1986 QETH_CARD_TEXT_(card, 2, "4err%04x", rc); 1987 rc = qeth_l3_setrouting_v6(card); 1988 if (rc) 1989 QETH_CARD_TEXT_(card, 2, "5err%04x", rc); 1990 } 1991 1992 card->state = CARD_STATE_SOFTSETUP; 1993 1994 qeth_set_allowed_threads(card, 0xffffffff, 0); 1995 qeth_l3_recover_ip(card); 1996 1997 if (dev->reg_state != NETREG_REGISTERED) { 1998 rc = qeth_l3_setup_netdev(card); 1999 if (rc) 2000 goto err_setup; 2001 2002 if (carrier_ok) 2003 netif_carrier_on(dev); 2004 } else { 2005 rtnl_lock(); 2006 rc = qeth_set_real_num_tx_queues(card, 2007 qeth_tx_actual_queues(card)); 2008 if (rc) { 2009 rtnl_unlock(); 2010 goto err_set_queues; 2011 } 2012 2013 if (carrier_ok) 2014 netif_carrier_on(dev); 2015 else 2016 netif_carrier_off(dev); 2017 2018 netif_device_attach(dev); 2019 qeth_enable_hw_features(dev); 2020 2021 if (card->info.open_when_online) { 2022 card->info.open_when_online = 0; 2023 dev_open(dev, NULL); 2024 } 2025 rtnl_unlock(); 2026 } 2027 return 0; 2028 2029 err_set_queues: 2030 err_setup: 2031 qeth_set_allowed_threads(card, 0, 1); 2032 card->state = CARD_STATE_DOWN; 2033 qeth_l3_clear_ip_htable(card, 1); 2034 return rc; 2035 } 2036 2037 static void qeth_l3_set_offline(struct qeth_card *card) 2038 { 2039 qeth_set_allowed_threads(card, 0, 1); 2040 qeth_l3_drain_rx_mode_cache(card); 2041 2042 if (card->options.sniffer && 2043 (card->info.promisc_mode == SET_PROMISC_MODE_ON)) 2044 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE); 2045 2046 if (card->state == CARD_STATE_SOFTSETUP) { 2047 card->state = CARD_STATE_DOWN; 2048 qeth_l3_clear_ip_htable(card, 1); 2049 } 2050 } 2051 2052 /* Returns zero if the command is successfully "consumed" */ 2053 static int qeth_l3_control_event(struct qeth_card *card, 2054 struct qeth_ipa_cmd *cmd) 2055 { 2056 return 1; 2057 } 2058 2059 const struct qeth_discipline qeth_l3_discipline = { 2060 .setup = qeth_l3_probe_device, 2061 .remove = qeth_l3_remove_device, 2062 .set_online = qeth_l3_set_online, 2063 .set_offline = qeth_l3_set_offline, 2064 .control_event_handler = qeth_l3_control_event, 2065 }; 2066 EXPORT_SYMBOL_GPL(qeth_l3_discipline); 2067 2068 static int qeth_l3_handle_ip_event(struct qeth_card *card, 2069 struct qeth_ipaddr *addr, 2070 unsigned long event) 2071 { 2072 switch (event) { 2073 case NETDEV_UP: 2074 qeth_l3_modify_ip(card, addr, true); 2075 return NOTIFY_OK; 2076 case NETDEV_DOWN: 2077 qeth_l3_modify_ip(card, addr, false); 2078 return NOTIFY_OK; 2079 default: 2080 return NOTIFY_DONE; 2081 } 2082 } 2083 2084 struct qeth_l3_ip_event_work { 2085 struct work_struct work; 2086 struct qeth_card *card; 2087 struct qeth_ipaddr addr; 2088 }; 2089 2090 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work) 2091 2092 static void qeth_l3_add_ip_worker(struct work_struct *work) 2093 { 2094 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work); 2095 2096 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true); 2097 kfree(work); 2098 } 2099 2100 static void qeth_l3_delete_ip_worker(struct work_struct *work) 2101 { 2102 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work); 2103 2104 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false); 2105 kfree(work); 2106 } 2107 2108 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev) 2109 { 2110 if (is_vlan_dev(dev)) 2111 dev = vlan_dev_real_dev(dev); 2112 if (dev->netdev_ops == &qeth_l3_osa_netdev_ops || 2113 dev->netdev_ops == &qeth_l3_netdev_ops) 2114 return (struct qeth_card *) dev->ml_priv; 2115 return NULL; 2116 } 2117 2118 static int qeth_l3_ip_event(struct notifier_block *this, 2119 unsigned long event, void *ptr) 2120 { 2121 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; 2122 struct net_device *dev = ifa->ifa_dev->dev; 2123 struct qeth_ipaddr addr; 2124 struct qeth_card *card; 2125 2126 card = qeth_l3_get_card_from_dev(dev); 2127 if (!card) 2128 return NOTIFY_DONE; 2129 QETH_CARD_TEXT(card, 3, "ipevent"); 2130 2131 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4); 2132 addr.u.a4.addr = ifa->ifa_address; 2133 addr.u.a4.mask = ifa->ifa_mask; 2134 2135 return qeth_l3_handle_ip_event(card, &addr, event); 2136 } 2137 2138 static struct notifier_block qeth_l3_ip_notifier = { 2139 qeth_l3_ip_event, 2140 NULL, 2141 }; 2142 2143 static int qeth_l3_ip6_event(struct notifier_block *this, 2144 unsigned long event, void *ptr) 2145 { 2146 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 2147 struct net_device *dev = ifa->idev->dev; 2148 struct qeth_l3_ip_event_work *ip_work; 2149 struct qeth_card *card; 2150 2151 if (event != NETDEV_UP && event != NETDEV_DOWN) 2152 return NOTIFY_DONE; 2153 2154 card = qeth_l3_get_card_from_dev(dev); 2155 if (!card) 2156 return NOTIFY_DONE; 2157 QETH_CARD_TEXT(card, 3, "ip6event"); 2158 if (!qeth_is_supported(card, IPA_IPV6)) 2159 return NOTIFY_DONE; 2160 2161 ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC); 2162 if (!ip_work) 2163 return NOTIFY_DONE; 2164 2165 if (event == NETDEV_UP) 2166 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker); 2167 else 2168 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker); 2169 2170 ip_work->card = card; 2171 qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL, 2172 QETH_PROT_IPV6); 2173 ip_work->addr.u.a6.addr = ifa->addr; 2174 ip_work->addr.u.a6.pfxlen = ifa->prefix_len; 2175 2176 queue_work(card->cmd_wq, &ip_work->work); 2177 return NOTIFY_OK; 2178 } 2179 2180 static struct notifier_block qeth_l3_ip6_notifier = { 2181 qeth_l3_ip6_event, 2182 NULL, 2183 }; 2184 2185 static int qeth_l3_register_notifiers(void) 2186 { 2187 int rc; 2188 2189 QETH_DBF_TEXT(SETUP, 5, "regnotif"); 2190 rc = register_inetaddr_notifier(&qeth_l3_ip_notifier); 2191 if (rc) 2192 return rc; 2193 rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier); 2194 if (rc) { 2195 unregister_inetaddr_notifier(&qeth_l3_ip_notifier); 2196 return rc; 2197 } 2198 return 0; 2199 } 2200 2201 static void qeth_l3_unregister_notifiers(void) 2202 { 2203 QETH_DBF_TEXT(SETUP, 5, "unregnot"); 2204 WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier)); 2205 WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier)); 2206 } 2207 2208 static int __init qeth_l3_init(void) 2209 { 2210 pr_info("register layer 3 discipline\n"); 2211 return qeth_l3_register_notifiers(); 2212 } 2213 2214 static void __exit qeth_l3_exit(void) 2215 { 2216 qeth_l3_unregister_notifiers(); 2217 pr_info("unregister layer 3 discipline\n"); 2218 } 2219 2220 module_init(qeth_l3_init); 2221 module_exit(qeth_l3_exit); 2222 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); 2223 MODULE_DESCRIPTION("qeth layer 3 discipline"); 2224 MODULE_LICENSE("GPL"); 2225