drivers/s390/net/qeth_l3_main.c

   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                 if (addr->proto == QETH_PROT_IPV4)
 108                         rc = !memcmp(addr_bits, ipatoe_bits,
 109                                      min(32, ipatoe->mask_bits));
 110                 else
 111                         rc = !memcmp(addr_bits, ipatoe_bits,
 112                                      min(128, ipatoe->mask_bits));
 113                 if (rc)
 114                         break;
 115         }
 116         /* invert? */
 117         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 118                 rc = !rc;
 119         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 120                 rc = !rc;
 121
 122         return rc;
 123 }
 124
 125 static int qeth_l3_delete_ip(struct qeth_card *card,
 126                              struct qeth_ipaddr *tmp_addr)
 127 {
 128         int rc = 0;
 129         struct qeth_ipaddr *addr;
 130
 131         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 132                 QETH_CARD_TEXT(card, 2, "delrxip");
 133         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 134                 QETH_CARD_TEXT(card, 2, "delvipa");
 135         else
 136                 QETH_CARD_TEXT(card, 2, "delip");
 137
 138         if (tmp_addr->proto == QETH_PROT_IPV4)
 139                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 140         else {
 141                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 142                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 143         }
 144
 145         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 146         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 147                 return -ENOENT;
 148
 149         addr->ref_counter--;
 150         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 151                 return rc;
 152
 153         if (qeth_card_hw_is_reachable(card))
 154                 rc = qeth_l3_deregister_addr_entry(card, addr);
 155
 156         hash_del(&addr->hnode);
 157         kfree(addr);
 158
 159         return rc;
 160 }
 161
 162 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 163 {
 164         int rc = 0;
 165         struct qeth_ipaddr *addr;
 166         char buf[40];
 167
 168         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 169                 QETH_CARD_TEXT(card, 2, "addrxip");
 170         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 171                 QETH_CARD_TEXT(card, 2, "addvipa");
 172         else
 173                 QETH_CARD_TEXT(card, 2, "addip");
 174
 175         if (tmp_addr->proto == QETH_PROT_IPV4)
 176                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 177         else {
 178                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 179                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 180         }
 181
 182         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 183         if (addr) {
 184                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 185                         return -EADDRINUSE;
 186                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 187                         addr->ref_counter++;
 188                         return 0;
 189                 }
 190                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 191                                          buf);
 192                 dev_warn(&card->gdev->dev,
 193                          "Registering IP address %s failed\n", buf);
 194                 return -EADDRINUSE;
 195         } else {
 196                 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 197                 if (!addr)
 198                         return -ENOMEM;
 199
 200                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 201                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 202                         addr->ipato = 1;
 203                 }
 204                 hash_add(card->ip_htable, &addr->hnode,
 205                                 qeth_l3_ipaddr_hash(addr));
 206
 207                 if (!qeth_card_hw_is_reachable(card)) {
 208                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 209                         return 0;
 210                 }
 211
 212                 rc = qeth_l3_register_addr_entry(card, addr);
 213
 214                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 215                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 216                 } else {
 217                         hash_del(&addr->hnode);
 218                         kfree(addr);
 219                 }
 220         }
 221         return rc;
 222 }
 223
 224 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 225                              bool add)
 226 {
 227         int rc;
 228
 229         mutex_lock(&card->ip_lock);
 230         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 231         mutex_unlock(&card->ip_lock);
 232
 233         return rc;
 234 }
 235
 236 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 237 {
 238         struct qeth_ipaddr *addr;
 239         struct hlist_node *tmp;
 240         int i;
 241
 242         hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 243                 hash_del(&addr->hnode);
 244                 kfree(addr);
 245         }
 246 }
 247
 248 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 249 {
 250         struct qeth_ipaddr *addr;
 251         struct hlist_node *tmp;
 252         int i;
 253
 254         QETH_CARD_TEXT(card, 4, "clearip");
 255
 256         mutex_lock(&card->ip_lock);
 257
 258         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 259                 if (!recover) {
 260                         hash_del(&addr->hnode);
 261                         kfree(addr);
 262                         continue;
 263                 }
 264                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 265         }
 266
 267         mutex_unlock(&card->ip_lock);
 268 }
 269
 270 static void qeth_l3_recover_ip(struct qeth_card *card)
 271 {
 272         struct qeth_ipaddr *addr;
 273         struct hlist_node *tmp;
 274         int i;
 275         int rc;
 276
 277         QETH_CARD_TEXT(card, 4, "recovrip");
 278
 279         mutex_lock(&card->ip_lock);
 280
 281         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 282                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 283                         rc = qeth_l3_register_addr_entry(card, addr);
 284
 285                         if (!rc) {
 286                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 287                         } else {
 288                                 hash_del(&addr->hnode);
 289                                 kfree(addr);
 290                         }
 291                 }
 292         }
 293
 294         mutex_unlock(&card->ip_lock);
 295 }
 296
 297 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 298                                unsigned long data)
 299 {
 300         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 301
 302         switch (cmd->hdr.return_code) {
 303         case IPA_RC_SUCCESS:
 304                 return 0;
 305         case IPA_RC_DUPLICATE_IP_ADDRESS:
 306                 return -EADDRINUSE;
 307         case IPA_RC_MC_ADDR_NOT_FOUND:
 308                 return -ENOENT;
 309         case IPA_RC_LAN_OFFLINE:
 310                 return -ENETDOWN;
 311         default:
 312                 return -EIO;
 313         }
 314 }
 315
 316 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 317                                  struct qeth_ipaddr *addr,
 318                                  enum qeth_ipa_cmds ipacmd)
 319 {
 320         struct qeth_cmd_buffer *iob;
 321         struct qeth_ipa_cmd *cmd;
 322
 323         QETH_CARD_TEXT(card, 4, "setdelmc");
 324
 325         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 326                                  IPA_DATA_SIZEOF(setdelipm));
 327         if (!iob)
 328                 return -ENOMEM;
 329         cmd = __ipa_cmd(iob);
 330         if (addr->proto == QETH_PROT_IPV6) {
 331                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 332                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 333         } else {
 334                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 335                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 336         }
 337
 338         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 339 }
 340
 341 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 342 {
 343         unsigned int i = 0;
 344
 345         while (len && i < 4) {
 346                 int mask_len = min_t(int, len, 32);
 347
 348                 prefix->s6_addr32[i] = inet_make_mask(mask_len);
 349                 len -= mask_len;
 350                 i++;
 351         }
 352 }
 353
 354 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 355 {
 356         switch (addr->type) {
 357         case QETH_IP_TYPE_RXIP:
 358                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 359         case QETH_IP_TYPE_VIPA:
 360                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 361                                QETH_IPA_DELIP_VIPA_FLAG;
 362         default:
 363                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 364         }
 365 }
 366
 367 static int qeth_l3_send_setdelip(struct qeth_card *card,
 368                                  struct qeth_ipaddr *addr,
 369                                  enum qeth_ipa_cmds ipacmd)
 370 {
 371         struct qeth_cmd_buffer *iob;
 372         struct qeth_ipa_cmd *cmd;
 373         u32 flags;
 374
 375         QETH_CARD_TEXT(card, 4, "setdelip");
 376
 377         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 378                                  IPA_DATA_SIZEOF(setdelip6));
 379         if (!iob)
 380                 return -ENOMEM;
 381         cmd = __ipa_cmd(iob);
 382
 383         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 384         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 385
 386         if (addr->proto == QETH_PROT_IPV6) {
 387                 cmd->data.setdelip6.addr = addr->u.a6.addr;
 388                 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 389                                         addr->u.a6.pfxlen);
 390                 cmd->data.setdelip6.flags = flags;
 391         } else {
 392                 cmd->data.setdelip4.addr = addr->u.a4.addr;
 393                 cmd->data.setdelip4.mask = addr->u.a4.mask;
 394                 cmd->data.setdelip4.flags = flags;
 395         }
 396
 397         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 398 }
 399
 400 static int qeth_l3_send_setrouting(struct qeth_card *card,
 401         enum qeth_routing_types type, enum qeth_prot_versions prot)
 402 {
 403         int rc;
 404         struct qeth_ipa_cmd *cmd;
 405         struct qeth_cmd_buffer *iob;
 406
 407         QETH_CARD_TEXT(card, 4, "setroutg");
 408         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 409                                  IPA_DATA_SIZEOF(setrtg));
 410         if (!iob)
 411                 return -ENOMEM;
 412         cmd = __ipa_cmd(iob);
 413         cmd->data.setrtg.type = (type);
 414         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 415
 416         return rc;
 417 }
 418
 419 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 420                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 421 {
 422         if (IS_IQD(card)) {
 423                 switch (*type) {
 424                 case NO_ROUTER:
 425                 case PRIMARY_CONNECTOR:
 426                 case SECONDARY_CONNECTOR:
 427                 case MULTICAST_ROUTER:
 428                         return 0;
 429                 default:
 430                         goto out_inval;
 431                 }
 432         } else {
 433                 switch (*type) {
 434                 case NO_ROUTER:
 435                 case PRIMARY_ROUTER:
 436                 case SECONDARY_ROUTER:
 437                         return 0;
 438                 case MULTICAST_ROUTER:
 439                         if (qeth_is_ipafunc_supported(card, prot,
 440                                                       IPA_OSA_MC_ROUTER))
 441                                 return 0;
 442                 default:
 443                         goto out_inval;
 444                 }
 445         }
 446 out_inval:
 447         *type = NO_ROUTER;
 448         return -EINVAL;
 449 }
 450
 451 int qeth_l3_setrouting_v4(struct qeth_card *card)
 452 {
 453         int rc;
 454
 455         QETH_CARD_TEXT(card, 3, "setrtg4");
 456
 457         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 458                                   QETH_PROT_IPV4);
 459         if (rc)
 460                 return rc;
 461
 462         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 463                                   QETH_PROT_IPV4);
 464         if (rc) {
 465                 card->options.route4.type = NO_ROUTER;
 466                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 467                                  rc, CARD_DEVID(card));
 468         }
 469         return rc;
 470 }
 471
 472 int qeth_l3_setrouting_v6(struct qeth_card *card)
 473 {
 474         int rc = 0;
 475
 476         QETH_CARD_TEXT(card, 3, "setrtg6");
 477
 478         if (!qeth_is_supported(card, IPA_IPV6))
 479                 return 0;
 480         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 481                                   QETH_PROT_IPV6);
 482         if (rc)
 483                 return rc;
 484
 485         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 486                                   QETH_PROT_IPV6);
 487         if (rc) {
 488                 card->options.route6.type = NO_ROUTER;
 489                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 490                                  rc, CARD_DEVID(card));
 491         }
 492         return rc;
 493 }
 494
 495 /*
 496  * IP address takeover related functions
 497  */
 498
 499 /**
 500  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 501  *
 502  * Caller must hold ip_lock.
 503  */
 504 void qeth_l3_update_ipato(struct qeth_card *card)
 505 {
 506         struct qeth_ipaddr *addr;
 507         unsigned int i;
 508
 509         hash_for_each(card->ip_htable, i, addr, hnode) {
 510                 if (addr->type != QETH_IP_TYPE_NORMAL)
 511                         continue;
 512                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 513         }
 514 }
 515
 516 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 517 {
 518         struct qeth_ipato_entry *ipatoe, *tmp;
 519
 520         mutex_lock(&card->ip_lock);
 521
 522         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 523                 list_del(&ipatoe->entry);
 524                 kfree(ipatoe);
 525         }
 526
 527         qeth_l3_update_ipato(card);
 528         mutex_unlock(&card->ip_lock);
 529 }
 530
 531 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 532                                 struct qeth_ipato_entry *new)
 533 {
 534         struct qeth_ipato_entry *ipatoe;
 535         int rc = 0;
 536
 537         QETH_CARD_TEXT(card, 2, "addipato");
 538
 539         mutex_lock(&card->conf_mutex);
 540         mutex_lock(&card->ip_lock);
 541
 542         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 543                 if (ipatoe->proto != new->proto)
 544                         continue;
 545                 if (!memcmp(ipatoe->addr, new->addr,
 546                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 547                     (ipatoe->mask_bits == new->mask_bits)) {
 548                         rc = -EEXIST;
 549                         break;
 550                 }
 551         }
 552
 553         if (!rc) {
 554                 list_add_tail(&new->entry, &card->ipato.entries);
 555                 qeth_l3_update_ipato(card);
 556         }
 557
 558         mutex_unlock(&card->ip_lock);
 559         mutex_unlock(&card->conf_mutex);
 560
 561         return rc;
 562 }
 563
 564 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 565                             enum qeth_prot_versions proto, u8 *addr,
 566                             int mask_bits)
 567 {
 568         struct qeth_ipato_entry *ipatoe, *tmp;
 569         int rc = -ENOENT;
 570
 571         QETH_CARD_TEXT(card, 2, "delipato");
 572
 573         mutex_lock(&card->conf_mutex);
 574         mutex_lock(&card->ip_lock);
 575
 576         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 577                 if (ipatoe->proto != proto)
 578                         continue;
 579                 if (!memcmp(ipatoe->addr, addr,
 580                             (proto == QETH_PROT_IPV4)? 4:16) &&
 581                     (ipatoe->mask_bits == mask_bits)) {
 582                         list_del(&ipatoe->entry);
 583                         qeth_l3_update_ipato(card);
 584                         kfree(ipatoe);
 585                         rc = 0;
 586                 }
 587         }
 588
 589         mutex_unlock(&card->ip_lock);
 590         mutex_unlock(&card->conf_mutex);
 591
 592         return rc;
 593 }
 594
 595 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 596                              enum qeth_ip_types type,
 597                              enum qeth_prot_versions proto)
 598 {
 599         struct qeth_ipaddr addr;
 600         int rc;
 601
 602         qeth_l3_init_ipaddr(&addr, type, proto);
 603         if (proto == QETH_PROT_IPV4)
 604                 memcpy(&addr.u.a4.addr, ip, 4);
 605         else
 606                 memcpy(&addr.u.a6.addr, ip, 16);
 607
 608         mutex_lock(&card->conf_mutex);
 609         rc = qeth_l3_modify_ip(card, &addr, add);
 610         mutex_unlock(&card->conf_mutex);
 611
 612         return rc;
 613 }
 614
 615 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 616 {
 617         struct qeth_ipaddr addr;
 618         unsigned int i;
 619
 620         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 621         addr.u.a6.addr.s6_addr[0] = 0xfe;
 622         addr.u.a6.addr.s6_addr[1] = 0x80;
 623         for (i = 0; i < 8; i++)
 624                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 625
 626         return qeth_l3_modify_ip(card, &addr, add);
 627 }
 628
 629 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 630                                 struct qeth_ipaddr *addr)
 631 {
 632         char buf[50];
 633         int rc = 0;
 634         int cnt = 3;
 635
 636         if (card->options.sniffer)
 637                 return 0;
 638
 639         if (addr->proto == QETH_PROT_IPV4) {
 640                 QETH_CARD_TEXT(card, 2, "setaddr4");
 641                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 642         } else if (addr->proto == QETH_PROT_IPV6) {
 643                 QETH_CARD_TEXT(card, 2, "setaddr6");
 644                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 645                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 646         } else {
 647                 QETH_CARD_TEXT(card, 2, "setaddr?");
 648                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 649         }
 650         do {
 651                 if (addr->is_multicast)
 652                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 653                 else
 654                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 655                 if (rc)
 656                         QETH_CARD_TEXT(card, 2, "failed");
 657         } while ((--cnt > 0) && rc);
 658         if (rc) {
 659                 QETH_CARD_TEXT(card, 2, "FAILED");
 660                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 661                 dev_warn(&card->gdev->dev,
 662                         "Registering IP address %s failed\n", buf);
 663         }
 664         return rc;
 665 }
 666
 667 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 668                                                 struct qeth_ipaddr *addr)
 669 {
 670         int rc = 0;
 671
 672         if (card->options.sniffer)
 673                 return 0;
 674
 675         if (addr->proto == QETH_PROT_IPV4) {
 676                 QETH_CARD_TEXT(card, 2, "deladdr4");
 677                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 678         } else if (addr->proto == QETH_PROT_IPV6) {
 679                 QETH_CARD_TEXT(card, 2, "deladdr6");
 680                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 681                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 682         } else {
 683                 QETH_CARD_TEXT(card, 2, "deladdr?");
 684                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 685         }
 686         if (addr->is_multicast)
 687                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 688         else
 689                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 690         if (rc)
 691                 QETH_CARD_TEXT(card, 2, "failed");
 692
 693         return rc;
 694 }
 695
 696 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 697 {
 698         int rc = 0;
 699
 700         QETH_CARD_TEXT(card, 2, "setadprm");
 701
 702         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 703                 rc = qeth_setadpparms_change_macaddr(card);
 704                 if (rc)
 705                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 706                                 " address failed\n");
 707         }
 708
 709         return rc;
 710 }
 711
 712 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 713 {
 714         int rc;
 715
 716         QETH_CARD_TEXT(card, 3, "ipaarp");
 717
 718         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 719                 dev_info(&card->gdev->dev,
 720                         "ARP processing not supported on %s!\n",
 721                         QETH_CARD_IFNAME(card));
 722                 return 0;
 723         }
 724         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 725                                           IPA_CMD_ASS_START, NULL);
 726         if (rc) {
 727                 dev_warn(&card->gdev->dev,
 728                         "Starting ARP processing support for %s failed\n",
 729                         QETH_CARD_IFNAME(card));
 730         }
 731         return rc;
 732 }
 733
 734 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 735 {
 736         int rc;
 737
 738         QETH_CARD_TEXT(card, 3, "stsrcmac");
 739
 740         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 741                 dev_info(&card->gdev->dev,
 742                         "Inbound source MAC-address not supported on %s\n",
 743                         QETH_CARD_IFNAME(card));
 744                 return -EOPNOTSUPP;
 745         }
 746
 747         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 748                                           IPA_CMD_ASS_START, NULL);
 749         if (rc)
 750                 dev_warn(&card->gdev->dev,
 751                         "Starting source MAC-address support for %s failed\n",
 752                         QETH_CARD_IFNAME(card));
 753         return rc;
 754 }
 755
 756 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 757 {
 758         int rc = 0;
 759
 760         QETH_CARD_TEXT(card, 3, "strtvlan");
 761
 762         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 763                 dev_info(&card->gdev->dev,
 764                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 765                 return -EOPNOTSUPP;
 766         }
 767
 768         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 769                                           IPA_CMD_ASS_START, NULL);
 770         if (rc) {
 771                 dev_warn(&card->gdev->dev,
 772                         "Starting VLAN support for %s failed\n",
 773                         QETH_CARD_IFNAME(card));
 774         } else {
 775                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 776         }
 777         return rc;
 778 }
 779
 780 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 781 {
 782         int rc;
 783
 784         QETH_CARD_TEXT(card, 3, "stmcast");
 785
 786         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 787                 dev_info(&card->gdev->dev,
 788                         "Multicast not supported on %s\n",
 789                         QETH_CARD_IFNAME(card));
 790                 return -EOPNOTSUPP;
 791         }
 792
 793         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 794                                           IPA_CMD_ASS_START, NULL);
 795         if (rc) {
 796                 dev_warn(&card->gdev->dev,
 797                         "Starting multicast support for %s failed\n",
 798                         QETH_CARD_IFNAME(card));
 799         } else {
 800                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 801                 card->dev->flags |= IFF_MULTICAST;
 802         }
 803         return rc;
 804 }
 805
 806 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 807 {
 808         u32 ipv6_data = 3;
 809         int rc;
 810
 811         QETH_CARD_TEXT(card, 3, "softipv6");
 812
 813         if (IS_IQD(card))
 814                 goto out;
 815
 816         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 817                                           &ipv6_data);
 818         if (rc) {
 819                 dev_err(&card->gdev->dev,
 820                         "Activating IPv6 support for %s failed\n",
 821                         QETH_CARD_IFNAME(card));
 822                 return rc;
 823         }
 824         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 825                                              NULL);
 826         if (rc) {
 827                 dev_err(&card->gdev->dev,
 828                         "Activating IPv6 support for %s failed\n",
 829                          QETH_CARD_IFNAME(card));
 830                 return rc;
 831         }
 832         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 833                                              IPA_CMD_ASS_START, NULL);
 834         if (rc) {
 835                 dev_warn(&card->gdev->dev,
 836                         "Enabling the passthrough mode for %s failed\n",
 837                         QETH_CARD_IFNAME(card));
 838                 return rc;
 839         }
 840 out:
 841         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 842         return 0;
 843 }
 844
 845 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 846 {
 847         QETH_CARD_TEXT(card, 3, "strtipv6");
 848
 849         if (!qeth_is_supported(card, IPA_IPV6)) {
 850                 dev_info(&card->gdev->dev,
 851                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 852                 return 0;
 853         }
 854         return qeth_l3_softsetup_ipv6(card);
 855 }
 856
 857 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 858 {
 859         u32 filter_data = 1;
 860         int rc;
 861
 862         QETH_CARD_TEXT(card, 3, "stbrdcst");
 863         card->info.broadcast_capable = 0;
 864         if (!qeth_is_supported(card, IPA_FILTERING)) {
 865                 dev_info(&card->gdev->dev,
 866                         "Broadcast not supported on %s\n",
 867                         QETH_CARD_IFNAME(card));
 868                 rc = -EOPNOTSUPP;
 869                 goto out;
 870         }
 871         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 872                                           IPA_CMD_ASS_START, NULL);
 873         if (rc) {
 874                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 875                         "%s failed\n", QETH_CARD_IFNAME(card));
 876                 goto out;
 877         }
 878
 879         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 880                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 881         if (rc) {
 882                 dev_warn(&card->gdev->dev,
 883                         "Setting up broadcast filtering for %s failed\n",
 884                         QETH_CARD_IFNAME(card));
 885                 goto out;
 886         }
 887         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 888         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 889         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 890                                           IPA_CMD_ASS_ENABLE, &filter_data);
 891         if (rc) {
 892                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 893                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 894                 goto out;
 895         }
 896         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 897 out:
 898         if (card->info.broadcast_capable)
 899                 card->dev->flags |= IFF_BROADCAST;
 900         else
 901                 card->dev->flags &= ~IFF_BROADCAST;
 902         return rc;
 903 }
 904
 905 static void qeth_l3_start_ipassists(struct qeth_card *card)
 906 {
 907         QETH_CARD_TEXT(card, 3, "strtipas");
 908
 909         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 910         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 911         qeth_l3_start_ipa_vlan(card);           /* go on*/
 912         qeth_l3_start_ipa_multicast(card);              /* go on*/
 913         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 914         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 915 }
 916
 917 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 918                 struct qeth_reply *reply, unsigned long data)
 919 {
 920         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 921
 922         if (cmd->hdr.return_code)
 923                 return -EIO;
 924         if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 925                 return -EADDRNOTAVAIL;
 926
 927         ether_addr_copy(card->dev->dev_addr,
 928                         cmd->data.create_destroy_addr.mac_addr);
 929         return 0;
 930 }
 931
 932 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 933 {
 934         int rc = 0;
 935         struct qeth_cmd_buffer *iob;
 936
 937         QETH_CARD_TEXT(card, 2, "hsrmac");
 938
 939         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 940                                  IPA_DATA_SIZEOF(create_destroy_addr));
 941         if (!iob)
 942                 return -ENOMEM;
 943
 944         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 945                                 NULL);
 946         return rc;
 947 }
 948
 949 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 950                 struct qeth_reply *reply, unsigned long data)
 951 {
 952         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 953         u16 *uid = reply->param;
 954
 955         if (cmd->hdr.return_code == 0) {
 956                 *uid = cmd->data.create_destroy_addr.uid;
 957                 return 0;
 958         }
 959
 960         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 961         return -EIO;
 962 }
 963
 964 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 965 {
 966         struct qeth_cmd_buffer *iob;
 967
 968         QETH_CARD_TEXT(card, 2, "guniqeid");
 969
 970         if (!qeth_is_supported(card, IPA_IPV6))
 971                 goto out;
 972
 973         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 974                                  IPA_DATA_SIZEOF(create_destroy_addr));
 975         if (!iob)
 976                 goto out;
 977
 978         __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 979         qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 980
 981 out:
 982         return uid;
 983 }
 984
 985 static int
 986 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 987                             unsigned long data)
 988 {
 989         struct qeth_ipa_cmd        *cmd;
 990         __u16 rc;
 991
 992         QETH_CARD_TEXT(card, 2, "diastrcb");
 993
 994         cmd = (struct qeth_ipa_cmd *)data;
 995         rc = cmd->hdr.return_code;
 996         if (rc)
 997                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 998         switch (cmd->data.diagass.action) {
 999         case QETH_DIAGS_CMD_TRACE_QUERY:
1000                 break;
1001         case QETH_DIAGS_CMD_TRACE_DISABLE:
1002                 switch (rc) {
1003                 case 0:
1004                 case IPA_RC_INVALID_SUBCMD:
1005                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1006                         dev_info(&card->gdev->dev, "The HiperSockets network "
1007                                 "traffic analyzer is deactivated\n");
1008                         break;
1009                 default:
1010                         break;
1011                 }
1012                 break;
1013         case QETH_DIAGS_CMD_TRACE_ENABLE:
1014                 switch (rc) {
1015                 case 0:
1016                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1017                         dev_info(&card->gdev->dev, "The HiperSockets network "
1018                                 "traffic analyzer is activated\n");
1019                         break;
1020                 case IPA_RC_HARDWARE_AUTH_ERROR:
1021                         dev_warn(&card->gdev->dev, "The device is not "
1022                                 "authorized to run as a HiperSockets network "
1023                                 "traffic analyzer\n");
1024                         break;
1025                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1026                         dev_warn(&card->gdev->dev, "A HiperSockets "
1027                                 "network traffic analyzer is already "
1028                                 "active in the HiperSockets LAN\n");
1029                         break;
1030                 default:
1031                         break;
1032                 }
1033                 break;
1034         default:
1035                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1036                                  cmd->data.diagass.action, CARD_DEVID(card));
1037         }
1038
1039         return rc ? -EIO : 0;
1040 }
1041
1042 static int
1043 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1044 {
1045         struct qeth_cmd_buffer *iob;
1046         struct qeth_ipa_cmd    *cmd;
1047
1048         QETH_CARD_TEXT(card, 2, "diagtrac");
1049
1050         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1051         if (!iob)
1052                 return -ENOMEM;
1053         cmd = __ipa_cmd(iob);
1054         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1055         cmd->data.diagass.action = diags_cmd;
1056         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1057 }
1058
1059 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1060 {
1061         struct qeth_card *card = arg;
1062         struct inet6_dev *in6_dev;
1063         struct in_device *in4_dev;
1064         struct qeth_ipaddr *ipm;
1065         struct qeth_ipaddr tmp;
1066         struct ip_mc_list *im4;
1067         struct ifmcaddr6 *im6;
1068
1069         QETH_CARD_TEXT(card, 4, "addmc");
1070
1071         if (!dev || !(dev->flags & IFF_UP))
1072                 goto out;
1073
1074         in4_dev = __in_dev_get_rtnl(dev);
1075         if (!in4_dev)
1076                 goto walk_ipv6;
1077
1078         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1079         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1080         tmp.is_multicast = 1;
1081
1082         for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1083              im4 = rtnl_dereference(im4->next_rcu)) {
1084                 tmp.u.a4.addr = im4->multiaddr;
1085
1086                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1087                 if (ipm) {
1088                         /* for mcast, by-IP match means full match */
1089                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1090                         continue;
1091                 }
1092
1093                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1094                 if (!ipm)
1095                         continue;
1096
1097                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1098                          qeth_l3_ipaddr_hash(ipm));
1099         }
1100
1101 walk_ipv6:
1102         if (!qeth_is_supported(card, IPA_IPV6))
1103                 goto out;
1104
1105         in6_dev = __in6_dev_get(dev);
1106         if (!in6_dev)
1107                 goto out;
1108
1109         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1110         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1111         tmp.is_multicast = 1;
1112
1113         read_lock_bh(&in6_dev->lock);
1114         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1115                 tmp.u.a6.addr = im6->mca_addr;
1116
1117                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1118                 if (ipm) {
1119                         /* for mcast, by-IP match means full match */
1120                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1121                         continue;
1122                 }
1123
1124                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1125                 if (!ipm)
1126                         continue;
1127
1128                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1129                          qeth_l3_ipaddr_hash(ipm));
1130
1131         }
1132         read_unlock_bh(&in6_dev->lock);
1133
1134 out:
1135         return 0;
1136 }
1137
1138 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1139                                    __be16 proto, u16 vid)
1140 {
1141         struct qeth_card *card = dev->ml_priv;
1142
1143         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1144         return 0;
1145 }
1146
1147 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1148                                     __be16 proto, u16 vid)
1149 {
1150         struct qeth_card *card = dev->ml_priv;
1151
1152         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1153         return 0;
1154 }
1155
1156 static void qeth_l3_stop_card(struct qeth_card *card)
1157 {
1158         QETH_CARD_TEXT(card, 2, "stopcard");
1159
1160         qeth_set_allowed_threads(card, 0, 1);
1161
1162         cancel_work_sync(&card->rx_mode_work);
1163         qeth_l3_drain_rx_mode_cache(card);
1164
1165         if (card->options.sniffer &&
1166             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1167                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1168
1169         if (card->state == CARD_STATE_SOFTSETUP) {
1170                 qeth_l3_clear_ip_htable(card, 1);
1171                 qeth_clear_ipacmd_list(card);
1172                 card->state = CARD_STATE_DOWN;
1173         }
1174
1175         qeth_qdio_clear_card(card, 0);
1176         qeth_drain_output_queues(card);
1177         qeth_clear_working_pool_list(card);
1178         flush_workqueue(card->event_wq);
1179         qeth_flush_local_addrs(card);
1180         card->info.promisc_mode = 0;
1181 }
1182
1183 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1184 {
1185         bool enable = card->dev->flags & IFF_PROMISC;
1186
1187         if (card->info.promisc_mode == enable)
1188                 return;
1189
1190         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1191                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1192                         qeth_setadp_promisc_mode(card, enable);
1193         } else if (card->options.sniffer &&     /* HiperSockets trace */
1194                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1195                 if (enable) {
1196                         QETH_CARD_TEXT(card, 3, "+promisc");
1197                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1198                 } else {
1199                         QETH_CARD_TEXT(card, 3, "-promisc");
1200                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1201                 }
1202         }
1203 }
1204
1205 static void qeth_l3_rx_mode_work(struct work_struct *work)
1206 {
1207         struct qeth_card *card = container_of(work, struct qeth_card,
1208                                               rx_mode_work);
1209         struct qeth_ipaddr *addr;
1210         struct hlist_node *tmp;
1211         int i, rc;
1212
1213         QETH_CARD_TEXT(card, 3, "setmulti");
1214
1215         if (!card->options.sniffer) {
1216                 rtnl_lock();
1217                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1218                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1219                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1220                 rtnl_unlock();
1221
1222                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1223                         switch (addr->disp_flag) {
1224                         case QETH_DISP_ADDR_DELETE:
1225                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1226                                 if (!rc || rc == -ENOENT) {
1227                                         hash_del(&addr->hnode);
1228                                         kfree(addr);
1229                                 }
1230                                 break;
1231                         case QETH_DISP_ADDR_ADD:
1232                                 rc = qeth_l3_register_addr_entry(card, addr);
1233                                 if (rc && rc != -ENETDOWN) {
1234                                         hash_del(&addr->hnode);
1235                                         kfree(addr);
1236                                         break;
1237                                 }
1238                                 fallthrough;
1239                         default:
1240                                 /* for next call to set_rx_mode(): */
1241                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1242                         }
1243                 }
1244         }
1245
1246         qeth_l3_set_promisc_mode(card);
1247 }
1248
1249 static int qeth_l3_arp_makerc(u16 rc)
1250 {
1251         switch (rc) {
1252         case IPA_RC_SUCCESS:
1253                 return 0;
1254         case QETH_IPA_ARP_RC_NOTSUPP:
1255         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1256                 return -EOPNOTSUPP;
1257         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1258                 return -EINVAL;
1259         case QETH_IPA_ARP_RC_Q_NO_DATA:
1260                 return -ENOENT;
1261         default:
1262                 return -EIO;
1263         }
1264 }
1265
1266 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1267                               unsigned long data)
1268 {
1269         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1270
1271         qeth_setassparms_cb(card, reply, data);
1272         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1273 }
1274
1275 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1276 {
1277         struct qeth_cmd_buffer *iob;
1278         int rc;
1279
1280         QETH_CARD_TEXT(card, 3, "arpstnoe");
1281
1282         /*
1283          * currently GuestLAN only supports the ARP assist function
1284          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1285          * thus we say EOPNOTSUPP for this ARP function
1286          */
1287         if (IS_VM_NIC(card))
1288                 return -EOPNOTSUPP;
1289         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1290                 return -EOPNOTSUPP;
1291         }
1292
1293         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1294                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1295                                        SETASS_DATA_SIZEOF(flags_32bit),
1296                                        QETH_PROT_IPV4);
1297         if (!iob)
1298                 return -ENOMEM;
1299
1300         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1301         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1302         if (rc)
1303                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1304                                  CARD_DEVID(card), rc);
1305         return rc;
1306 }
1307
1308 static __u32 get_arp_entry_size(struct qeth_card *card,
1309                         struct qeth_arp_query_data *qdata,
1310                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1311 {
1312         __u32 rc;
1313         __u8 is_hsi;
1314
1315         is_hsi = qdata->reply_bits == 5;
1316         if (type->ip == QETHARP_IP_ADDR_V4) {
1317                 QETH_CARD_TEXT(card, 4, "arpev4");
1318                 if (strip_entries) {
1319                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1320                                 sizeof(struct qeth_arp_qi_entry7_short);
1321                 } else {
1322                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1323                                 sizeof(struct qeth_arp_qi_entry7);
1324                 }
1325         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1326                 QETH_CARD_TEXT(card, 4, "arpev6");
1327                 if (strip_entries) {
1328                         rc = is_hsi ?
1329                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1330                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1331                 } else {
1332                         rc = is_hsi ?
1333                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1334                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1335                 }
1336         } else {
1337                 QETH_CARD_TEXT(card, 4, "arpinv");
1338                 rc = 0;
1339         }
1340
1341         return rc;
1342 }
1343
1344 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1345 {
1346         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1347                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1348 }
1349
1350 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1351                 struct qeth_reply *reply, unsigned long data)
1352 {
1353         struct qeth_ipa_cmd *cmd;
1354         struct qeth_arp_query_data *qdata;
1355         struct qeth_arp_query_info *qinfo;
1356         int e;
1357         int entrybytes_done;
1358         int stripped_bytes;
1359         __u8 do_strip_entries;
1360
1361         QETH_CARD_TEXT(card, 3, "arpquecb");
1362
1363         qinfo = (struct qeth_arp_query_info *) reply->param;
1364         cmd = (struct qeth_ipa_cmd *) data;
1365         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1366         if (cmd->hdr.return_code) {
1367                 QETH_CARD_TEXT(card, 4, "arpcberr");
1368                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1369                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1370         }
1371         if (cmd->data.setassparms.hdr.return_code) {
1372                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1373                 QETH_CARD_TEXT(card, 4, "setaperr");
1374                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1375                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1376         }
1377         qdata = &cmd->data.setassparms.data.query_arp;
1378         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1379
1380         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1381         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1382         entrybytes_done = 0;
1383         for (e = 0; e < qdata->no_entries; ++e) {
1384                 char *cur_entry;
1385                 __u32 esize;
1386                 struct qeth_arp_entrytype *etype;
1387
1388                 cur_entry = &qdata->data + entrybytes_done;
1389                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1390                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1391                         QETH_CARD_TEXT(card, 4, "pmis");
1392                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1393                         break;
1394                 }
1395                 esize = get_arp_entry_size(card, qdata, etype,
1396                         do_strip_entries);
1397                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1398                 if (!esize)
1399                         break;
1400
1401                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1402                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1403                         memset(qinfo->udata, 0, 4);
1404                         return -ENOSPC;
1405                 }
1406
1407                 memcpy(qinfo->udata + qinfo->udata_offset,
1408                         &qdata->data + entrybytes_done + stripped_bytes,
1409                         esize);
1410                 entrybytes_done += esize + stripped_bytes;
1411                 qinfo->udata_offset += esize;
1412                 ++qinfo->no_entries;
1413         }
1414         /* check if all replies received ... */
1415         if (cmd->data.setassparms.hdr.seq_no <
1416             cmd->data.setassparms.hdr.number_of_replies)
1417                 return 1;
1418         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1419         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1420         /* keep STRIP_ENTRIES flag so the user program can distinguish
1421          * stripped entries from normal ones */
1422         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1423                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1424         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1425         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1426         return 0;
1427 }
1428
1429 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1430         enum qeth_prot_versions prot,
1431         struct qeth_arp_query_info *qinfo)
1432 {
1433         struct qeth_cmd_buffer *iob;
1434         struct qeth_ipa_cmd *cmd;
1435         int rc;
1436
1437         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1438
1439         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1440                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1441                                        SETASS_DATA_SIZEOF(query_arp), prot);
1442         if (!iob)
1443                 return -ENOMEM;
1444         cmd = __ipa_cmd(iob);
1445         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1446         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1447         if (rc)
1448                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1449                                  CARD_DEVID(card), rc);
1450         return rc;
1451 }
1452
1453 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1454 {
1455         struct qeth_arp_query_info qinfo = {0, };
1456         int rc;
1457
1458         QETH_CARD_TEXT(card, 3, "arpquery");
1459
1460         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1461                                IPA_ARP_PROCESSING)) {
1462                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1463                 rc = -EOPNOTSUPP;
1464                 goto out;
1465         }
1466         /* get size of userspace buffer and mask_bits -> 6 bytes */
1467         if (copy_from_user(&qinfo, udata, 6)) {
1468                 rc = -EFAULT;
1469                 goto out;
1470         }
1471         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1472         if (!qinfo.udata) {
1473                 rc = -ENOMEM;
1474                 goto out;
1475         }
1476         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1477         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1478         if (rc) {
1479                 if (copy_to_user(udata, qinfo.udata, 4))
1480                         rc = -EFAULT;
1481                 goto free_and_out;
1482         }
1483         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1484                 /* fails in case of GuestLAN QDIO mode */
1485                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1486         }
1487         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1488                 QETH_CARD_TEXT(card, 4, "qactf");
1489                 rc = -EFAULT;
1490                 goto free_and_out;
1491         }
1492         QETH_CARD_TEXT(card, 4, "qacts");
1493
1494 free_and_out:
1495         kfree(qinfo.udata);
1496 out:
1497         return rc;
1498 }
1499
1500 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1501                                     struct qeth_arp_cache_entry *entry,
1502                                     enum qeth_arp_process_subcmds arp_cmd)
1503 {
1504         struct qeth_arp_cache_entry *cmd_entry;
1505         struct qeth_cmd_buffer *iob;
1506         int rc;
1507
1508         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1509                 QETH_CARD_TEXT(card, 3, "arpadd");
1510         else
1511                 QETH_CARD_TEXT(card, 3, "arpdel");
1512
1513         /*
1514          * currently GuestLAN only supports the ARP assist function
1515          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1516          * thus we say EOPNOTSUPP for this ARP function
1517          */
1518         if (IS_VM_NIC(card))
1519                 return -EOPNOTSUPP;
1520         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1521                 return -EOPNOTSUPP;
1522         }
1523
1524         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1525                                        SETASS_DATA_SIZEOF(arp_entry),
1526                                        QETH_PROT_IPV4);
1527         if (!iob)
1528                 return -ENOMEM;
1529
1530         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1531         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1532         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1533         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1534         if (rc)
1535                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1536                                  arp_cmd, CARD_DEVID(card), rc);
1537         return rc;
1538 }
1539
1540 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1541 {
1542         struct qeth_cmd_buffer *iob;
1543         int rc;
1544
1545         QETH_CARD_TEXT(card, 3, "arpflush");
1546
1547         /*
1548          * currently GuestLAN only supports the ARP assist function
1549          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1550          * thus we say EOPNOTSUPP for this ARP function
1551         */
1552         if (IS_VM_NIC(card) || IS_IQD(card))
1553                 return -EOPNOTSUPP;
1554         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1555                 return -EOPNOTSUPP;
1556         }
1557
1558         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1559                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1560                                        QETH_PROT_IPV4);
1561         if (!iob)
1562                 return -ENOMEM;
1563
1564         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1565         if (rc)
1566                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1567                                  CARD_DEVID(card), rc);
1568         return rc;
1569 }
1570
1571 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1572 {
1573         struct qeth_card *card = dev->ml_priv;
1574         struct qeth_arp_cache_entry arp_entry;
1575         enum qeth_arp_process_subcmds arp_cmd;
1576         int rc = 0;
1577
1578         switch (cmd) {
1579         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1580                 if (!capable(CAP_NET_ADMIN)) {
1581                         rc = -EPERM;
1582                         break;
1583                 }
1584                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1585                 break;
1586         case SIOC_QETH_ARP_QUERY_INFO:
1587                 if (!capable(CAP_NET_ADMIN)) {
1588                         rc = -EPERM;
1589                         break;
1590                 }
1591                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1592                 break;
1593         case SIOC_QETH_ARP_ADD_ENTRY:
1594         case SIOC_QETH_ARP_REMOVE_ENTRY:
1595                 if (!capable(CAP_NET_ADMIN))
1596                         return -EPERM;
1597                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1598                         return -EFAULT;
1599
1600                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1601                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1602                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1603                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1604         case SIOC_QETH_ARP_FLUSH_CACHE:
1605                 if (!capable(CAP_NET_ADMIN)) {
1606                         rc = -EPERM;
1607                         break;
1608                 }
1609                 rc = qeth_l3_arp_flush_cache(card);
1610                 break;
1611         default:
1612                 rc = -EOPNOTSUPP;
1613         }
1614         return rc;
1615 }
1616
1617 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1618                                      int ipv)
1619 {
1620         struct neighbour *n = NULL;
1621
1622         if (dst)
1623                 n = dst_neigh_lookup_skb(dst, skb);
1624
1625         if (n) {
1626                 int cast_type = n->type;
1627
1628                 neigh_release(n);
1629                 if ((cast_type == RTN_BROADCAST) ||
1630                     (cast_type == RTN_MULTICAST) ||
1631                     (cast_type == RTN_ANYCAST))
1632                         return cast_type;
1633                 return RTN_UNICAST;
1634         }
1635
1636         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1637         switch (ipv) {
1638         case 4:
1639                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1640                         return RTN_BROADCAST;
1641                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1642                                 RTN_MULTICAST : RTN_UNICAST;
1643         case 6:
1644                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1645                                 RTN_MULTICAST : RTN_UNICAST;
1646         default:
1647                 /* ... and MAC address */
1648                 return qeth_get_ether_cast_type(skb);
1649         }
1650 }
1651
1652 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1653 {
1654         int ipv = qeth_get_ip_version(skb);
1655         struct dst_entry *dst;
1656         int cast_type;
1657
1658         rcu_read_lock();
1659         dst = qeth_dst_check_rcu(skb, ipv);
1660         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1661         rcu_read_unlock();
1662
1663         return cast_type;
1664 }
1665
1666 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1667 {
1668         if (cast_type == RTN_MULTICAST)
1669                 return QETH_CAST_MULTICAST;
1670         if (cast_type == RTN_ANYCAST)
1671                 return QETH_CAST_ANYCAST;
1672         if (cast_type == RTN_BROADCAST)
1673                 return QETH_CAST_BROADCAST;
1674         return QETH_CAST_UNICAST;
1675 }
1676
1677 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1678                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1679                                 int ipv, unsigned int data_len)
1680 {
1681         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1682         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1683         struct qeth_card *card = queue->card;
1684         struct dst_entry *dst;
1685         int cast_type;
1686
1687         hdr->hdr.l3.length = data_len;
1688
1689         if (skb_is_gso(skb)) {
1690                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1691         } else {
1692                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1693
1694                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1695                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1696                         l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1697                         memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1698                                iucv_trans_hdr(skb)->destUserID, 8);
1699                         return;
1700                 }
1701
1702                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1703                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1704                         /* some HW requires combined L3+L4 csum offload: */
1705                         if (ipv == 4)
1706                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1707                 }
1708         }
1709
1710         if (ipv == 4 || IS_IQD(card)) {
1711                 /* NETIF_F_HW_VLAN_CTAG_TX */
1712                 if (skb_vlan_tag_present(skb)) {
1713                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1714                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1715                 }
1716         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1717                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1718                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1719         }
1720
1721         rcu_read_lock();
1722         dst = qeth_dst_check_rcu(skb, ipv);
1723
1724         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1725                 cast_type = RTN_UNICAST;
1726         else
1727                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1728         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1729
1730         if (ipv == 4) {
1731                 l3_hdr->next_hop.addr.s6_addr32[3] =
1732                                         qeth_next_hop_v4_rcu(skb, dst);
1733         } else if (ipv == 6) {
1734                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1735
1736                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1737                 if (!IS_IQD(card))
1738                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1739         } else {
1740                 /* OSA only: */
1741                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1742         }
1743         rcu_read_unlock();
1744 }
1745
1746 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1747 {
1748         struct iphdr *iph = ip_hdr(skb);
1749
1750         /* this is safe, IPv6 traffic takes a different path */
1751         if (skb->ip_summed == CHECKSUM_PARTIAL)
1752                 iph->check = 0;
1753         if (skb_is_gso(skb)) {
1754                 iph->tot_len = 0;
1755                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1756                                                     iph->daddr, 0);
1757         }
1758 }
1759
1760 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1761                         struct qeth_qdio_out_q *queue, int ipv)
1762 {
1763         unsigned int hw_hdr_len;
1764         int rc;
1765
1766         /* re-use the L2 header area for the HW header: */
1767         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1768                                        sizeof(struct qeth_hdr);
1769         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1770         if (rc)
1771                 return rc;
1772         skb_pull(skb, ETH_HLEN);
1773
1774         qeth_l3_fixup_headers(skb);
1775         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1776 }
1777
1778 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1779                                            struct net_device *dev)
1780 {
1781         struct qeth_card *card = dev->ml_priv;
1782         u16 txq = skb_get_queue_mapping(skb);
1783         int ipv = qeth_get_ip_version(skb);
1784         struct qeth_qdio_out_q *queue;
1785         int rc;
1786
1787         if (!skb_is_gso(skb))
1788                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1789         if (IS_IQD(card)) {
1790                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1791
1792                 if (card->options.sniffer)
1793                         goto tx_drop;
1794                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1795                     (card->options.cq == QETH_CQ_ENABLED &&
1796                      skb->protocol != htons(ETH_P_AF_IUCV)))
1797                         goto tx_drop;
1798         } else {
1799                 queue = card->qdio.out_qs[txq];
1800         }
1801
1802         if (!(dev->flags & IFF_BROADCAST) &&
1803             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1804                 goto tx_drop;
1805
1806         if (ipv == 4 || IS_IQD(card))
1807                 rc = qeth_l3_xmit(card, skb, queue, ipv);
1808         else
1809                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1810
1811         if (!rc)
1812                 return NETDEV_TX_OK;
1813
1814 tx_drop:
1815         QETH_TXQ_STAT_INC(queue, tx_dropped);
1816         kfree_skb(skb);
1817         return NETDEV_TX_OK;
1818 }
1819
1820 static void qeth_l3_set_rx_mode(struct net_device *dev)
1821 {
1822         struct qeth_card *card = dev->ml_priv;
1823
1824         schedule_work(&card->rx_mode_work);
1825 }
1826
1827 /*
1828  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1829  * NOARP on the netdevice is no option because it also turns off neighbor
1830  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1831  * arp resolution but we want the hard header (packet socket will work
1832  * e.g. tcpdump)
1833  */
1834 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1835 {
1836         n->nud_state = NUD_NOARP;
1837         memcpy(n->ha, "FAKELL", 6);
1838         n->output = n->ops->connected_output;
1839         return 0;
1840 }
1841
1842 static int
1843 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1844 {
1845         if (np->tbl->family == AF_INET)
1846                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1847
1848         return 0;
1849 }
1850
1851 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1852                                                     struct net_device *dev,
1853                                                     netdev_features_t features)
1854 {
1855         if (qeth_get_ip_version(skb) != 4)
1856                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1857         return qeth_features_check(skb, dev, features);
1858 }
1859
1860 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1861                                     struct net_device *sb_dev)
1862 {
1863         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1864                                      sb_dev);
1865 }
1866
1867 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1868                                     struct net_device *sb_dev)
1869 {
1870         struct qeth_card *card = dev->ml_priv;
1871
1872         return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
1873                                  qeth_get_priority_queue(card, skb);
1874 }
1875
1876 static const struct net_device_ops qeth_l3_netdev_ops = {
1877         .ndo_open               = qeth_open,
1878         .ndo_stop               = qeth_stop,
1879         .ndo_get_stats64        = qeth_get_stats64,
1880         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1881         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1882         .ndo_validate_addr      = eth_validate_addr,
1883         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1884         .ndo_do_ioctl           = qeth_do_ioctl,
1885         .ndo_fix_features       = qeth_fix_features,
1886         .ndo_set_features       = qeth_set_features,
1887         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1888         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1889         .ndo_tx_timeout         = qeth_tx_timeout,
1890 };
1891
1892 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1893         .ndo_open               = qeth_open,
1894         .ndo_stop               = qeth_stop,
1895         .ndo_get_stats64        = qeth_get_stats64,
1896         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1897         .ndo_features_check     = qeth_l3_osa_features_check,
1898         .ndo_select_queue       = qeth_l3_osa_select_queue,
1899         .ndo_validate_addr      = eth_validate_addr,
1900         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1901         .ndo_do_ioctl           = qeth_do_ioctl,
1902         .ndo_fix_features       = qeth_fix_features,
1903         .ndo_set_features       = qeth_set_features,
1904         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1905         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1906         .ndo_tx_timeout         = qeth_tx_timeout,
1907         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1908 };
1909
1910 static int qeth_l3_setup_netdev(struct qeth_card *card)
1911 {
1912         struct net_device *dev = card->dev;
1913         unsigned int headroom;
1914         int rc;
1915
1916         rc = qeth_setup_netdev(card);
1917         if (rc)
1918                 return rc;
1919
1920         if (IS_OSD(card) || IS_OSX(card)) {
1921                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1922
1923                 /*IPv6 address autoconfiguration stuff*/
1924                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1925
1926                 if (!IS_VM_NIC(card)) {
1927                         card->dev->features |= NETIF_F_SG;
1928                         card->dev->hw_features |= NETIF_F_TSO |
1929                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1930                         card->dev->vlan_features |= NETIF_F_TSO |
1931                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1932                 }
1933
1934                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1935                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1936                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1937                 }
1938                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1939                         card->dev->hw_features |= NETIF_F_TSO6;
1940                         card->dev->vlan_features |= NETIF_F_TSO6;
1941                 }
1942
1943                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1944                 if (card->dev->hw_features & NETIF_F_TSO6)
1945                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1946                 else if (card->dev->hw_features & NETIF_F_TSO)
1947                         headroom = sizeof(struct qeth_hdr_tso);
1948                 else
1949                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1950         } else if (IS_IQD(card)) {
1951                 card->dev->flags |= IFF_NOARP;
1952                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1953                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1954
1955                 rc = qeth_l3_iqd_read_initial_mac(card);
1956                 if (rc)
1957                         return rc;
1958         } else
1959                 return -ENODEV;
1960
1961         card->dev->needed_headroom = headroom;
1962         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1963                                 NETIF_F_HW_VLAN_CTAG_RX |
1964                                 NETIF_F_HW_VLAN_CTAG_FILTER;
1965
1966         netif_keep_dst(card->dev);
1967         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1968                 netif_set_gso_max_size(card->dev,
1969                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1970
1971         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1972         return register_netdev(card->dev);
1973 }
1974
1975 static const struct device_type qeth_l3_devtype = {
1976         .name = "qeth_layer3",
1977         .groups = qeth_l3_attr_groups,
1978 };
1979
1980 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1981 {
1982         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1983         int rc;
1984
1985         hash_init(card->ip_htable);
1986         mutex_init(&card->ip_lock);
1987         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1988                                                dev_name(&gdev->dev));
1989         if (!card->cmd_wq)
1990                 return -ENOMEM;
1991
1992         if (gdev->dev.type == &qeth_generic_devtype) {
1993                 rc = qeth_l3_create_device_attributes(&gdev->dev);
1994                 if (rc) {
1995                         destroy_workqueue(card->cmd_wq);
1996                         return rc;
1997                 }
1998         }
1999
2000         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
2001         return 0;
2002 }
2003
2004 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2005 {
2006         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2007
2008         if (cgdev->dev.type == &qeth_generic_devtype)
2009                 qeth_l3_remove_device_attributes(&cgdev->dev);
2010
2011         qeth_set_allowed_threads(card, 0, 1);
2012         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2013
2014         if (cgdev->state == CCWGROUP_ONLINE)
2015                 qeth_set_offline(card, false);
2016
2017         cancel_work_sync(&card->close_dev_work);
2018         if (card->dev->reg_state == NETREG_REGISTERED)
2019                 unregister_netdev(card->dev);
2020
2021         flush_workqueue(card->cmd_wq);
2022         destroy_workqueue(card->cmd_wq);
2023         qeth_l3_clear_ip_htable(card, 0);
2024         qeth_l3_clear_ipato_list(card);
2025 }
2026
2027 static int qeth_l3_set_online(struct qeth_card *card)
2028 {
2029         struct ccwgroup_device *gdev = card->gdev;
2030         struct net_device *dev = card->dev;
2031         int rc = 0;
2032         bool carrier_ok;
2033
2034         rc = qeth_core_hardsetup_card(card, &carrier_ok);
2035         if (rc) {
2036                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2037                 rc = -ENODEV;
2038                 goto out_remove;
2039         }
2040
2041         qeth_print_status_message(card);
2042
2043         /* softsetup */
2044         QETH_CARD_TEXT(card, 2, "softsetp");
2045
2046         rc = qeth_l3_setadapter_parms(card);
2047         if (rc)
2048                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2049         if (!card->options.sniffer) {
2050                 qeth_l3_start_ipassists(card);
2051
2052                 rc = qeth_l3_setrouting_v4(card);
2053                 if (rc)
2054                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2055                 rc = qeth_l3_setrouting_v6(card);
2056                 if (rc)
2057                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2058         }
2059
2060         card->state = CARD_STATE_SOFTSETUP;
2061
2062         qeth_set_allowed_threads(card, 0xffffffff, 0);
2063         qeth_l3_recover_ip(card);
2064
2065         if (dev->reg_state != NETREG_REGISTERED) {
2066                 rc = qeth_l3_setup_netdev(card);
2067                 if (rc)
2068                         goto out_remove;
2069
2070                 if (carrier_ok)
2071                         netif_carrier_on(dev);
2072         } else {
2073                 rtnl_lock();
2074                 if (carrier_ok)
2075                         netif_carrier_on(dev);
2076                 else
2077                         netif_carrier_off(dev);
2078
2079                 netif_device_attach(dev);
2080                 qeth_enable_hw_features(dev);
2081
2082                 if (card->info.open_when_online) {
2083                         card->info.open_when_online = 0;
2084                         dev_open(dev, NULL);
2085                 }
2086                 rtnl_unlock();
2087         }
2088         qeth_trace_features(card);
2089         /* let user_space know that device is online */
2090         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2091         return 0;
2092 out_remove:
2093         qeth_l3_stop_card(card);
2094         qeth_stop_channel(&card->data);
2095         qeth_stop_channel(&card->write);
2096         qeth_stop_channel(&card->read);
2097         qdio_free(CARD_DDEV(card));
2098         return rc;
2099 }
2100
2101 static void qeth_l3_set_offline(struct qeth_card *card)
2102 {
2103         qeth_l3_stop_card(card);
2104 }
2105
2106 /* Returns zero if the command is successfully "consumed" */
2107 static int qeth_l3_control_event(struct qeth_card *card,
2108                                         struct qeth_ipa_cmd *cmd)
2109 {
2110         return 1;
2111 }
2112
2113 struct qeth_discipline qeth_l3_discipline = {
2114         .devtype = &qeth_l3_devtype,
2115         .setup = qeth_l3_probe_device,
2116         .remove = qeth_l3_remove_device,
2117         .set_online = qeth_l3_set_online,
2118         .set_offline = qeth_l3_set_offline,
2119         .do_ioctl = qeth_l3_do_ioctl,
2120         .control_event_handler = qeth_l3_control_event,
2121 };
2122 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2123
2124 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2125                                    struct qeth_ipaddr *addr,
2126                                    unsigned long event)
2127 {
2128         switch (event) {
2129         case NETDEV_UP:
2130                 qeth_l3_modify_ip(card, addr, true);
2131                 return NOTIFY_OK;
2132         case NETDEV_DOWN:
2133                 qeth_l3_modify_ip(card, addr, false);
2134                 return NOTIFY_OK;
2135         default:
2136                 return NOTIFY_DONE;
2137         }
2138 }
2139
2140 struct qeth_l3_ip_event_work {
2141         struct work_struct work;
2142         struct qeth_card *card;
2143         struct qeth_ipaddr addr;
2144 };
2145
2146 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2147
2148 static void qeth_l3_add_ip_worker(struct work_struct *work)
2149 {
2150         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2151
2152         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2153         kfree(work);
2154 }
2155
2156 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2157 {
2158         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2159
2160         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2161         kfree(work);
2162 }
2163
2164 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2165 {
2166         if (is_vlan_dev(dev))
2167                 dev = vlan_dev_real_dev(dev);
2168         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2169             dev->netdev_ops == &qeth_l3_netdev_ops)
2170                 return (struct qeth_card *) dev->ml_priv;
2171         return NULL;
2172 }
2173
2174 static int qeth_l3_ip_event(struct notifier_block *this,
2175                             unsigned long event, void *ptr)
2176 {
2177
2178         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2179         struct net_device *dev = ifa->ifa_dev->dev;
2180         struct qeth_ipaddr addr;
2181         struct qeth_card *card;
2182
2183         card = qeth_l3_get_card_from_dev(dev);
2184         if (!card)
2185                 return NOTIFY_DONE;
2186         QETH_CARD_TEXT(card, 3, "ipevent");
2187
2188         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2189         addr.u.a4.addr = ifa->ifa_address;
2190         addr.u.a4.mask = ifa->ifa_mask;
2191
2192         return qeth_l3_handle_ip_event(card, &addr, event);
2193 }
2194
2195 static struct notifier_block qeth_l3_ip_notifier = {
2196         qeth_l3_ip_event,
2197         NULL,
2198 };
2199
2200 static int qeth_l3_ip6_event(struct notifier_block *this,
2201                              unsigned long event, void *ptr)
2202 {
2203         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2204         struct net_device *dev = ifa->idev->dev;
2205         struct qeth_l3_ip_event_work *ip_work;
2206         struct qeth_card *card;
2207
2208         if (event != NETDEV_UP && event != NETDEV_DOWN)
2209                 return NOTIFY_DONE;
2210
2211         card = qeth_l3_get_card_from_dev(dev);
2212         if (!card)
2213                 return NOTIFY_DONE;
2214         QETH_CARD_TEXT(card, 3, "ip6event");
2215         if (!qeth_is_supported(card, IPA_IPV6))
2216                 return NOTIFY_DONE;
2217
2218         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2219         if (!ip_work)
2220                 return NOTIFY_DONE;
2221
2222         if (event == NETDEV_UP)
2223                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2224         else
2225                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2226
2227         ip_work->card = card;
2228         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2229                             QETH_PROT_IPV6);
2230         ip_work->addr.u.a6.addr = ifa->addr;
2231         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2232
2233         queue_work(card->cmd_wq, &ip_work->work);
2234         return NOTIFY_OK;
2235 }
2236
2237 static struct notifier_block qeth_l3_ip6_notifier = {
2238         qeth_l3_ip6_event,
2239         NULL,
2240 };
2241
2242 static int qeth_l3_register_notifiers(void)
2243 {
2244         int rc;
2245
2246         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2247         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2248         if (rc)
2249                 return rc;
2250         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2251         if (rc) {
2252                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2253                 return rc;
2254         }
2255         return 0;
2256 }
2257
2258 static void qeth_l3_unregister_notifiers(void)
2259 {
2260         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2261         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2262         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2263 }
2264
2265 static int __init qeth_l3_init(void)
2266 {
2267         pr_info("register layer 3 discipline\n");
2268         return qeth_l3_register_notifiers();
2269 }
2270
2271 static void __exit qeth_l3_exit(void)
2272 {
2273         qeth_l3_unregister_notifiers();
2274         pr_info("unregister layer 3 discipline\n");
2275 }
2276
2277 module_init(qeth_l3_init);
2278 module_exit(qeth_l3_exit);
2279 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2280 MODULE_DESCRIPTION("qeth layer 3 discipline");
2281 MODULE_LICENSE("GPL");