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, ipatoe->mask_bits);
 109                 else
 110                         rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
 111                 if (rc)
 112                         break;
 113         }
 114         /* invert? */
 115         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 116                 rc = !rc;
 117         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 118                 rc = !rc;
 119
 120         return rc;
 121 }
 122
 123 static int qeth_l3_delete_ip(struct qeth_card *card,
 124                              struct qeth_ipaddr *tmp_addr)
 125 {
 126         int rc = 0;
 127         struct qeth_ipaddr *addr;
 128
 129         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 130                 QETH_CARD_TEXT(card, 2, "delrxip");
 131         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 132                 QETH_CARD_TEXT(card, 2, "delvipa");
 133         else
 134                 QETH_CARD_TEXT(card, 2, "delip");
 135
 136         if (tmp_addr->proto == QETH_PROT_IPV4)
 137                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 138         else {
 139                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 140                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 141         }
 142
 143         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 144         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 145                 return -ENOENT;
 146
 147         addr->ref_counter--;
 148         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 149                 return rc;
 150
 151         if (qeth_card_hw_is_reachable(card))
 152                 rc = qeth_l3_deregister_addr_entry(card, addr);
 153
 154         hash_del(&addr->hnode);
 155         kfree(addr);
 156
 157         return rc;
 158 }
 159
 160 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 161 {
 162         int rc = 0;
 163         struct qeth_ipaddr *addr;
 164         char buf[40];
 165
 166         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 167                 QETH_CARD_TEXT(card, 2, "addrxip");
 168         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 169                 QETH_CARD_TEXT(card, 2, "addvipa");
 170         else
 171                 QETH_CARD_TEXT(card, 2, "addip");
 172
 173         if (tmp_addr->proto == QETH_PROT_IPV4)
 174                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 175         else {
 176                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 177                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 178         }
 179
 180         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 181         if (addr) {
 182                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 183                         return -EADDRINUSE;
 184                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 185                         addr->ref_counter++;
 186                         return 0;
 187                 }
 188                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 189                                          buf);
 190                 dev_warn(&card->gdev->dev,
 191                          "Registering IP address %s failed\n", buf);
 192                 return -EADDRINUSE;
 193         } else {
 194                 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 195                 if (!addr)
 196                         return -ENOMEM;
 197
 198                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 199                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 200                         addr->ipato = 1;
 201                 }
 202                 hash_add(card->ip_htable, &addr->hnode,
 203                                 qeth_l3_ipaddr_hash(addr));
 204
 205                 if (!qeth_card_hw_is_reachable(card)) {
 206                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 207                         return 0;
 208                 }
 209
 210                 rc = qeth_l3_register_addr_entry(card, addr);
 211
 212                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 213                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 214                 } else {
 215                         hash_del(&addr->hnode);
 216                         kfree(addr);
 217                 }
 218         }
 219         return rc;
 220 }
 221
 222 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 223                              bool add)
 224 {
 225         int rc;
 226
 227         mutex_lock(&card->ip_lock);
 228         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 229         mutex_unlock(&card->ip_lock);
 230
 231         return rc;
 232 }
 233
 234 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 235 {
 236         struct qeth_ipaddr *addr;
 237         struct hlist_node *tmp;
 238         int i;
 239
 240         hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 241                 hash_del(&addr->hnode);
 242                 kfree(addr);
 243         }
 244 }
 245
 246 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 247 {
 248         struct qeth_ipaddr *addr;
 249         struct hlist_node *tmp;
 250         int i;
 251
 252         QETH_CARD_TEXT(card, 4, "clearip");
 253
 254         mutex_lock(&card->ip_lock);
 255
 256         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 257                 if (!recover) {
 258                         hash_del(&addr->hnode);
 259                         kfree(addr);
 260                         continue;
 261                 }
 262                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 263         }
 264
 265         mutex_unlock(&card->ip_lock);
 266 }
 267
 268 static void qeth_l3_recover_ip(struct qeth_card *card)
 269 {
 270         struct qeth_ipaddr *addr;
 271         struct hlist_node *tmp;
 272         int i;
 273         int rc;
 274
 275         QETH_CARD_TEXT(card, 4, "recovrip");
 276
 277         mutex_lock(&card->ip_lock);
 278
 279         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 280                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 281                         rc = qeth_l3_register_addr_entry(card, addr);
 282
 283                         if (!rc) {
 284                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 285                         } else {
 286                                 hash_del(&addr->hnode);
 287                                 kfree(addr);
 288                         }
 289                 }
 290         }
 291
 292         mutex_unlock(&card->ip_lock);
 293 }
 294
 295 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 296                                unsigned long data)
 297 {
 298         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 299
 300         switch (cmd->hdr.return_code) {
 301         case IPA_RC_SUCCESS:
 302                 return 0;
 303         case IPA_RC_DUPLICATE_IP_ADDRESS:
 304                 return -EADDRINUSE;
 305         case IPA_RC_MC_ADDR_NOT_FOUND:
 306                 return -ENOENT;
 307         case IPA_RC_LAN_OFFLINE:
 308                 return -ENETDOWN;
 309         default:
 310                 return -EIO;
 311         }
 312 }
 313
 314 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 315                                  struct qeth_ipaddr *addr,
 316                                  enum qeth_ipa_cmds ipacmd)
 317 {
 318         struct qeth_cmd_buffer *iob;
 319         struct qeth_ipa_cmd *cmd;
 320
 321         QETH_CARD_TEXT(card, 4, "setdelmc");
 322
 323         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 324                                  IPA_DATA_SIZEOF(setdelipm));
 325         if (!iob)
 326                 return -ENOMEM;
 327         cmd = __ipa_cmd(iob);
 328         if (addr->proto == QETH_PROT_IPV6) {
 329                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 330                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 331         } else {
 332                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 333                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 334         }
 335
 336         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 337 }
 338
 339 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 340 {
 341         unsigned int i = 0;
 342
 343         while (len && i < 4) {
 344                 int mask_len = min_t(int, len, 32);
 345
 346                 prefix->s6_addr32[i] = inet_make_mask(mask_len);
 347                 len -= mask_len;
 348                 i++;
 349         }
 350 }
 351
 352 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 353 {
 354         switch (addr->type) {
 355         case QETH_IP_TYPE_RXIP:
 356                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 357         case QETH_IP_TYPE_VIPA:
 358                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 359                                QETH_IPA_DELIP_VIPA_FLAG;
 360         default:
 361                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 362         }
 363 }
 364
 365 static int qeth_l3_send_setdelip(struct qeth_card *card,
 366                                  struct qeth_ipaddr *addr,
 367                                  enum qeth_ipa_cmds ipacmd)
 368 {
 369         struct qeth_cmd_buffer *iob;
 370         struct qeth_ipa_cmd *cmd;
 371         u32 flags;
 372
 373         QETH_CARD_TEXT(card, 4, "setdelip");
 374
 375         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 376                                  IPA_DATA_SIZEOF(setdelip6));
 377         if (!iob)
 378                 return -ENOMEM;
 379         cmd = __ipa_cmd(iob);
 380
 381         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 382         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 383
 384         if (addr->proto == QETH_PROT_IPV6) {
 385                 cmd->data.setdelip6.addr = addr->u.a6.addr;
 386                 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 387                                         addr->u.a6.pfxlen);
 388                 cmd->data.setdelip6.flags = flags;
 389         } else {
 390                 cmd->data.setdelip4.addr = addr->u.a4.addr;
 391                 cmd->data.setdelip4.mask = addr->u.a4.mask;
 392                 cmd->data.setdelip4.flags = flags;
 393         }
 394
 395         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 396 }
 397
 398 static int qeth_l3_send_setrouting(struct qeth_card *card,
 399         enum qeth_routing_types type, enum qeth_prot_versions prot)
 400 {
 401         int rc;
 402         struct qeth_ipa_cmd *cmd;
 403         struct qeth_cmd_buffer *iob;
 404
 405         QETH_CARD_TEXT(card, 4, "setroutg");
 406         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 407                                  IPA_DATA_SIZEOF(setrtg));
 408         if (!iob)
 409                 return -ENOMEM;
 410         cmd = __ipa_cmd(iob);
 411         cmd->data.setrtg.type = (type);
 412         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 413
 414         return rc;
 415 }
 416
 417 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 418                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 419 {
 420         if (IS_IQD(card)) {
 421                 switch (*type) {
 422                 case NO_ROUTER:
 423                 case PRIMARY_CONNECTOR:
 424                 case SECONDARY_CONNECTOR:
 425                 case MULTICAST_ROUTER:
 426                         return 0;
 427                 default:
 428                         goto out_inval;
 429                 }
 430         } else {
 431                 switch (*type) {
 432                 case NO_ROUTER:
 433                 case PRIMARY_ROUTER:
 434                 case SECONDARY_ROUTER:
 435                         return 0;
 436                 case MULTICAST_ROUTER:
 437                         if (qeth_is_ipafunc_supported(card, prot,
 438                                                       IPA_OSA_MC_ROUTER))
 439                                 return 0;
 440                 default:
 441                         goto out_inval;
 442                 }
 443         }
 444 out_inval:
 445         *type = NO_ROUTER;
 446         return -EINVAL;
 447 }
 448
 449 int qeth_l3_setrouting_v4(struct qeth_card *card)
 450 {
 451         int rc;
 452
 453         QETH_CARD_TEXT(card, 3, "setrtg4");
 454
 455         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 456                                   QETH_PROT_IPV4);
 457         if (rc)
 458                 return rc;
 459
 460         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 461                                   QETH_PROT_IPV4);
 462         if (rc) {
 463                 card->options.route4.type = NO_ROUTER;
 464                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 465                                  rc, CARD_DEVID(card));
 466         }
 467         return rc;
 468 }
 469
 470 int qeth_l3_setrouting_v6(struct qeth_card *card)
 471 {
 472         int rc = 0;
 473
 474         QETH_CARD_TEXT(card, 3, "setrtg6");
 475
 476         if (!qeth_is_supported(card, IPA_IPV6))
 477                 return 0;
 478         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 479                                   QETH_PROT_IPV6);
 480         if (rc)
 481                 return rc;
 482
 483         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 484                                   QETH_PROT_IPV6);
 485         if (rc) {
 486                 card->options.route6.type = NO_ROUTER;
 487                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 488                                  rc, CARD_DEVID(card));
 489         }
 490         return rc;
 491 }
 492
 493 /*
 494  * IP address takeover related functions
 495  */
 496
 497 /**
 498  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 499  *
 500  * Caller must hold ip_lock.
 501  */
 502 void qeth_l3_update_ipato(struct qeth_card *card)
 503 {
 504         struct qeth_ipaddr *addr;
 505         unsigned int i;
 506
 507         hash_for_each(card->ip_htable, i, addr, hnode) {
 508                 if (addr->type != QETH_IP_TYPE_NORMAL)
 509                         continue;
 510                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 511         }
 512 }
 513
 514 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 515 {
 516         struct qeth_ipato_entry *ipatoe, *tmp;
 517
 518         mutex_lock(&card->ip_lock);
 519
 520         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 521                 list_del(&ipatoe->entry);
 522                 kfree(ipatoe);
 523         }
 524
 525         qeth_l3_update_ipato(card);
 526         mutex_unlock(&card->ip_lock);
 527 }
 528
 529 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 530                                 struct qeth_ipato_entry *new)
 531 {
 532         struct qeth_ipato_entry *ipatoe;
 533         int rc = 0;
 534
 535         QETH_CARD_TEXT(card, 2, "addipato");
 536
 537         mutex_lock(&card->ip_lock);
 538
 539         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 540                 if (ipatoe->proto != new->proto)
 541                         continue;
 542                 if (!memcmp(ipatoe->addr, new->addr,
 543                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 544                     (ipatoe->mask_bits == new->mask_bits)) {
 545                         rc = -EEXIST;
 546                         break;
 547                 }
 548         }
 549
 550         if (!rc) {
 551                 list_add_tail(&new->entry, &card->ipato.entries);
 552                 qeth_l3_update_ipato(card);
 553         }
 554
 555         mutex_unlock(&card->ip_lock);
 556
 557         return rc;
 558 }
 559
 560 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 561                             enum qeth_prot_versions proto, u8 *addr,
 562                             unsigned int mask_bits)
 563 {
 564         struct qeth_ipato_entry *ipatoe, *tmp;
 565         int rc = -ENOENT;
 566
 567         QETH_CARD_TEXT(card, 2, "delipato");
 568
 569         mutex_lock(&card->ip_lock);
 570
 571         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 572                 if (ipatoe->proto != proto)
 573                         continue;
 574                 if (!memcmp(ipatoe->addr, addr,
 575                             (proto == QETH_PROT_IPV4)? 4:16) &&
 576                     (ipatoe->mask_bits == mask_bits)) {
 577                         list_del(&ipatoe->entry);
 578                         qeth_l3_update_ipato(card);
 579                         kfree(ipatoe);
 580                         rc = 0;
 581                 }
 582         }
 583
 584         mutex_unlock(&card->ip_lock);
 585
 586         return rc;
 587 }
 588
 589 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 590                              enum qeth_ip_types type,
 591                              enum qeth_prot_versions proto)
 592 {
 593         struct qeth_ipaddr addr;
 594
 595         qeth_l3_init_ipaddr(&addr, type, proto);
 596         if (proto == QETH_PROT_IPV4)
 597                 memcpy(&addr.u.a4.addr, ip, 4);
 598         else
 599                 memcpy(&addr.u.a6.addr, ip, 16);
 600
 601         return qeth_l3_modify_ip(card, &addr, add);
 602 }
 603
 604 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 605 {
 606         struct qeth_ipaddr addr;
 607         unsigned int i;
 608
 609         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 610         addr.u.a6.addr.s6_addr[0] = 0xfe;
 611         addr.u.a6.addr.s6_addr[1] = 0x80;
 612         for (i = 0; i < 8; i++)
 613                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 614
 615         return qeth_l3_modify_ip(card, &addr, add);
 616 }
 617
 618 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 619                                 struct qeth_ipaddr *addr)
 620 {
 621         char buf[50];
 622         int rc = 0;
 623         int cnt = 3;
 624
 625         if (card->options.sniffer)
 626                 return 0;
 627
 628         if (addr->proto == QETH_PROT_IPV4) {
 629                 QETH_CARD_TEXT(card, 2, "setaddr4");
 630                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 631         } else if (addr->proto == QETH_PROT_IPV6) {
 632                 QETH_CARD_TEXT(card, 2, "setaddr6");
 633                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 634                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 635         } else {
 636                 QETH_CARD_TEXT(card, 2, "setaddr?");
 637                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 638         }
 639         do {
 640                 if (addr->is_multicast)
 641                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 642                 else
 643                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 644                 if (rc)
 645                         QETH_CARD_TEXT(card, 2, "failed");
 646         } while ((--cnt > 0) && rc);
 647         if (rc) {
 648                 QETH_CARD_TEXT(card, 2, "FAILED");
 649                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 650                 dev_warn(&card->gdev->dev,
 651                         "Registering IP address %s failed\n", buf);
 652         }
 653         return rc;
 654 }
 655
 656 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 657                                                 struct qeth_ipaddr *addr)
 658 {
 659         int rc = 0;
 660
 661         if (card->options.sniffer)
 662                 return 0;
 663
 664         if (addr->proto == QETH_PROT_IPV4) {
 665                 QETH_CARD_TEXT(card, 2, "deladdr4");
 666                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 667         } else if (addr->proto == QETH_PROT_IPV6) {
 668                 QETH_CARD_TEXT(card, 2, "deladdr6");
 669                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 670                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 671         } else {
 672                 QETH_CARD_TEXT(card, 2, "deladdr?");
 673                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 674         }
 675         if (addr->is_multicast)
 676                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 677         else
 678                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 679         if (rc)
 680                 QETH_CARD_TEXT(card, 2, "failed");
 681
 682         return rc;
 683 }
 684
 685 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 686 {
 687         int rc = 0;
 688
 689         QETH_CARD_TEXT(card, 2, "setadprm");
 690
 691         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 692                 rc = qeth_setadpparms_change_macaddr(card);
 693                 if (rc)
 694                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 695                                 " address failed\n");
 696         }
 697
 698         return rc;
 699 }
 700
 701 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 702 {
 703         int rc;
 704
 705         QETH_CARD_TEXT(card, 3, "ipaarp");
 706
 707         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 708                 dev_info(&card->gdev->dev,
 709                         "ARP processing not supported on %s!\n",
 710                         QETH_CARD_IFNAME(card));
 711                 return 0;
 712         }
 713         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 714                                           IPA_CMD_ASS_START, NULL);
 715         if (rc) {
 716                 dev_warn(&card->gdev->dev,
 717                         "Starting ARP processing support for %s failed\n",
 718                         QETH_CARD_IFNAME(card));
 719         }
 720         return rc;
 721 }
 722
 723 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 724 {
 725         int rc;
 726
 727         QETH_CARD_TEXT(card, 3, "stsrcmac");
 728
 729         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 730                 dev_info(&card->gdev->dev,
 731                         "Inbound source MAC-address not supported on %s\n",
 732                         QETH_CARD_IFNAME(card));
 733                 return -EOPNOTSUPP;
 734         }
 735
 736         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 737                                           IPA_CMD_ASS_START, NULL);
 738         if (rc)
 739                 dev_warn(&card->gdev->dev,
 740                         "Starting source MAC-address support for %s failed\n",
 741                         QETH_CARD_IFNAME(card));
 742         return rc;
 743 }
 744
 745 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 746 {
 747         int rc = 0;
 748
 749         QETH_CARD_TEXT(card, 3, "strtvlan");
 750
 751         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 752                 dev_info(&card->gdev->dev,
 753                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 754                 return -EOPNOTSUPP;
 755         }
 756
 757         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 758                                           IPA_CMD_ASS_START, NULL);
 759         if (rc) {
 760                 dev_warn(&card->gdev->dev,
 761                         "Starting VLAN support for %s failed\n",
 762                         QETH_CARD_IFNAME(card));
 763         } else {
 764                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 765         }
 766         return rc;
 767 }
 768
 769 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 770 {
 771         int rc;
 772
 773         QETH_CARD_TEXT(card, 3, "stmcast");
 774
 775         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 776                 dev_info(&card->gdev->dev,
 777                         "Multicast not supported on %s\n",
 778                         QETH_CARD_IFNAME(card));
 779                 return -EOPNOTSUPP;
 780         }
 781
 782         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 783                                           IPA_CMD_ASS_START, NULL);
 784         if (rc) {
 785                 dev_warn(&card->gdev->dev,
 786                         "Starting multicast support for %s failed\n",
 787                         QETH_CARD_IFNAME(card));
 788         } else {
 789                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 790                 card->dev->flags |= IFF_MULTICAST;
 791         }
 792         return rc;
 793 }
 794
 795 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 796 {
 797         u32 ipv6_data = 3;
 798         int rc;
 799
 800         QETH_CARD_TEXT(card, 3, "softipv6");
 801
 802         if (IS_IQD(card))
 803                 goto out;
 804
 805         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 806                                           &ipv6_data);
 807         if (rc) {
 808                 dev_err(&card->gdev->dev,
 809                         "Activating IPv6 support for %s failed\n",
 810                         QETH_CARD_IFNAME(card));
 811                 return rc;
 812         }
 813         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 814                                              NULL);
 815         if (rc) {
 816                 dev_err(&card->gdev->dev,
 817                         "Activating IPv6 support for %s failed\n",
 818                          QETH_CARD_IFNAME(card));
 819                 return rc;
 820         }
 821         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 822                                              IPA_CMD_ASS_START, NULL);
 823         if (rc) {
 824                 dev_warn(&card->gdev->dev,
 825                         "Enabling the passthrough mode for %s failed\n",
 826                         QETH_CARD_IFNAME(card));
 827                 return rc;
 828         }
 829 out:
 830         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 831         return 0;
 832 }
 833
 834 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 835 {
 836         QETH_CARD_TEXT(card, 3, "strtipv6");
 837
 838         if (!qeth_is_supported(card, IPA_IPV6)) {
 839                 dev_info(&card->gdev->dev,
 840                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 841                 return 0;
 842         }
 843         return qeth_l3_softsetup_ipv6(card);
 844 }
 845
 846 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 847 {
 848         u32 filter_data = 1;
 849         int rc;
 850
 851         QETH_CARD_TEXT(card, 3, "stbrdcst");
 852         card->info.broadcast_capable = 0;
 853         if (!qeth_is_supported(card, IPA_FILTERING)) {
 854                 dev_info(&card->gdev->dev,
 855                         "Broadcast not supported on %s\n",
 856                         QETH_CARD_IFNAME(card));
 857                 rc = -EOPNOTSUPP;
 858                 goto out;
 859         }
 860         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 861                                           IPA_CMD_ASS_START, NULL);
 862         if (rc) {
 863                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 864                         "%s failed\n", QETH_CARD_IFNAME(card));
 865                 goto out;
 866         }
 867
 868         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 869                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 870         if (rc) {
 871                 dev_warn(&card->gdev->dev,
 872                         "Setting up broadcast filtering for %s failed\n",
 873                         QETH_CARD_IFNAME(card));
 874                 goto out;
 875         }
 876         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 877         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 878         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 879                                           IPA_CMD_ASS_ENABLE, &filter_data);
 880         if (rc) {
 881                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 882                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 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         ether_addr_copy(card->dev->dev_addr,
 917                         cmd->data.create_destroy_addr.mac_addr);
 918         return 0;
 919 }
 920
 921 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 922 {
 923         int rc = 0;
 924         struct qeth_cmd_buffer *iob;
 925
 926         QETH_CARD_TEXT(card, 2, "hsrmac");
 927
 928         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 929                                  IPA_DATA_SIZEOF(create_destroy_addr));
 930         if (!iob)
 931                 return -ENOMEM;
 932
 933         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 934                                 NULL);
 935         return rc;
 936 }
 937
 938 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 939                 struct qeth_reply *reply, unsigned long data)
 940 {
 941         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 942         u16 *uid = reply->param;
 943
 944         if (cmd->hdr.return_code == 0) {
 945                 *uid = cmd->data.create_destroy_addr.uid;
 946                 return 0;
 947         }
 948
 949         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 950         return -EIO;
 951 }
 952
 953 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 954 {
 955         struct qeth_cmd_buffer *iob;
 956
 957         QETH_CARD_TEXT(card, 2, "guniqeid");
 958
 959         if (!qeth_is_supported(card, IPA_IPV6))
 960                 goto out;
 961
 962         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 963                                  IPA_DATA_SIZEOF(create_destroy_addr));
 964         if (!iob)
 965                 goto out;
 966
 967         __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 968         qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 969
 970 out:
 971         return uid;
 972 }
 973
 974 static int
 975 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 976                             unsigned long data)
 977 {
 978         struct qeth_ipa_cmd        *cmd;
 979         __u16 rc;
 980
 981         QETH_CARD_TEXT(card, 2, "diastrcb");
 982
 983         cmd = (struct qeth_ipa_cmd *)data;
 984         rc = cmd->hdr.return_code;
 985         if (rc)
 986                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 987         switch (cmd->data.diagass.action) {
 988         case QETH_DIAGS_CMD_TRACE_QUERY:
 989                 break;
 990         case QETH_DIAGS_CMD_TRACE_DISABLE:
 991                 switch (rc) {
 992                 case 0:
 993                 case IPA_RC_INVALID_SUBCMD:
 994                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
 995                         dev_info(&card->gdev->dev, "The HiperSockets network "
 996                                 "traffic analyzer is deactivated\n");
 997                         break;
 998                 default:
 999                         break;
1000                 }
1001                 break;
1002         case QETH_DIAGS_CMD_TRACE_ENABLE:
1003                 switch (rc) {
1004                 case 0:
1005                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1006                         dev_info(&card->gdev->dev, "The HiperSockets network "
1007                                 "traffic analyzer is activated\n");
1008                         break;
1009                 case IPA_RC_HARDWARE_AUTH_ERROR:
1010                         dev_warn(&card->gdev->dev, "The device is not "
1011                                 "authorized to run as a HiperSockets network "
1012                                 "traffic analyzer\n");
1013                         break;
1014                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1015                         dev_warn(&card->gdev->dev, "A HiperSockets "
1016                                 "network traffic analyzer is already "
1017                                 "active in the HiperSockets LAN\n");
1018                         break;
1019                 default:
1020                         break;
1021                 }
1022                 break;
1023         default:
1024                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1025                                  cmd->data.diagass.action, CARD_DEVID(card));
1026         }
1027
1028         return rc ? -EIO : 0;
1029 }
1030
1031 static int
1032 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1033 {
1034         struct qeth_cmd_buffer *iob;
1035         struct qeth_ipa_cmd    *cmd;
1036
1037         QETH_CARD_TEXT(card, 2, "diagtrac");
1038
1039         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1040         if (!iob)
1041                 return -ENOMEM;
1042         cmd = __ipa_cmd(iob);
1043         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1044         cmd->data.diagass.action = diags_cmd;
1045         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1046 }
1047
1048 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1049 {
1050         struct qeth_card *card = arg;
1051         struct inet6_dev *in6_dev;
1052         struct in_device *in4_dev;
1053         struct qeth_ipaddr *ipm;
1054         struct qeth_ipaddr tmp;
1055         struct ip_mc_list *im4;
1056         struct ifmcaddr6 *im6;
1057
1058         QETH_CARD_TEXT(card, 4, "addmc");
1059
1060         if (!dev || !(dev->flags & IFF_UP))
1061                 goto out;
1062
1063         in4_dev = __in_dev_get_rtnl(dev);
1064         if (!in4_dev)
1065                 goto walk_ipv6;
1066
1067         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1068         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1069         tmp.is_multicast = 1;
1070
1071         for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1072              im4 = rtnl_dereference(im4->next_rcu)) {
1073                 tmp.u.a4.addr = im4->multiaddr;
1074
1075                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1076                 if (ipm) {
1077                         /* for mcast, by-IP match means full match */
1078                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1079                         continue;
1080                 }
1081
1082                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1083                 if (!ipm)
1084                         continue;
1085
1086                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1087                          qeth_l3_ipaddr_hash(ipm));
1088         }
1089
1090 walk_ipv6:
1091         if (!qeth_is_supported(card, IPA_IPV6))
1092                 goto out;
1093
1094         in6_dev = __in6_dev_get(dev);
1095         if (!in6_dev)
1096                 goto out;
1097
1098         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1099         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1100         tmp.is_multicast = 1;
1101
1102         read_lock_bh(&in6_dev->lock);
1103         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = 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         read_unlock_bh(&in6_dev->lock);
1122
1123 out:
1124         return 0;
1125 }
1126
1127 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1128                                    __be16 proto, u16 vid)
1129 {
1130         struct qeth_card *card = dev->ml_priv;
1131
1132         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1133         return 0;
1134 }
1135
1136 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1137                                     __be16 proto, u16 vid)
1138 {
1139         struct qeth_card *card = dev->ml_priv;
1140
1141         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1142         return 0;
1143 }
1144
1145 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1146 {
1147         bool enable = card->dev->flags & IFF_PROMISC;
1148
1149         if (card->info.promisc_mode == enable)
1150                 return;
1151
1152         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1153                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1154                         qeth_setadp_promisc_mode(card, enable);
1155         } else if (card->options.sniffer &&     /* HiperSockets trace */
1156                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1157                 if (enable) {
1158                         QETH_CARD_TEXT(card, 3, "+promisc");
1159                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1160                 } else {
1161                         QETH_CARD_TEXT(card, 3, "-promisc");
1162                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1163                 }
1164         }
1165 }
1166
1167 static void qeth_l3_rx_mode_work(struct work_struct *work)
1168 {
1169         struct qeth_card *card = container_of(work, struct qeth_card,
1170                                               rx_mode_work);
1171         struct qeth_ipaddr *addr;
1172         struct hlist_node *tmp;
1173         int i, rc;
1174
1175         QETH_CARD_TEXT(card, 3, "setmulti");
1176
1177         if (!card->options.sniffer) {
1178                 rtnl_lock();
1179                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1180                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1181                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1182                 rtnl_unlock();
1183
1184                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1185                         switch (addr->disp_flag) {
1186                         case QETH_DISP_ADDR_DELETE:
1187                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1188                                 if (!rc || rc == -ENOENT) {
1189                                         hash_del(&addr->hnode);
1190                                         kfree(addr);
1191                                 }
1192                                 break;
1193                         case QETH_DISP_ADDR_ADD:
1194                                 rc = qeth_l3_register_addr_entry(card, addr);
1195                                 if (rc && rc != -ENETDOWN) {
1196                                         hash_del(&addr->hnode);
1197                                         kfree(addr);
1198                                         break;
1199                                 }
1200                                 fallthrough;
1201                         default:
1202                                 /* for next call to set_rx_mode(): */
1203                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1204                         }
1205                 }
1206         }
1207
1208         qeth_l3_set_promisc_mode(card);
1209 }
1210
1211 static int qeth_l3_arp_makerc(u16 rc)
1212 {
1213         switch (rc) {
1214         case IPA_RC_SUCCESS:
1215                 return 0;
1216         case QETH_IPA_ARP_RC_NOTSUPP:
1217         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1218                 return -EOPNOTSUPP;
1219         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1220                 return -EINVAL;
1221         case QETH_IPA_ARP_RC_Q_NO_DATA:
1222                 return -ENOENT;
1223         default:
1224                 return -EIO;
1225         }
1226 }
1227
1228 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1229                               unsigned long data)
1230 {
1231         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1232
1233         qeth_setassparms_cb(card, reply, data);
1234         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1235 }
1236
1237 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1238 {
1239         struct qeth_cmd_buffer *iob;
1240         int rc;
1241
1242         QETH_CARD_TEXT(card, 3, "arpstnoe");
1243
1244         /*
1245          * currently GuestLAN only supports the ARP assist function
1246          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1247          * thus we say EOPNOTSUPP for this ARP function
1248          */
1249         if (IS_VM_NIC(card))
1250                 return -EOPNOTSUPP;
1251         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1252                 return -EOPNOTSUPP;
1253         }
1254
1255         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1256                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1257                                        SETASS_DATA_SIZEOF(flags_32bit),
1258                                        QETH_PROT_IPV4);
1259         if (!iob)
1260                 return -ENOMEM;
1261
1262         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1263         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1264         if (rc)
1265                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1266                                  CARD_DEVID(card), rc);
1267         return rc;
1268 }
1269
1270 static __u32 get_arp_entry_size(struct qeth_card *card,
1271                         struct qeth_arp_query_data *qdata,
1272                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1273 {
1274         __u32 rc;
1275         __u8 is_hsi;
1276
1277         is_hsi = qdata->reply_bits == 5;
1278         if (type->ip == QETHARP_IP_ADDR_V4) {
1279                 QETH_CARD_TEXT(card, 4, "arpev4");
1280                 if (strip_entries) {
1281                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1282                                 sizeof(struct qeth_arp_qi_entry7_short);
1283                 } else {
1284                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1285                                 sizeof(struct qeth_arp_qi_entry7);
1286                 }
1287         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1288                 QETH_CARD_TEXT(card, 4, "arpev6");
1289                 if (strip_entries) {
1290                         rc = is_hsi ?
1291                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1292                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1293                 } else {
1294                         rc = is_hsi ?
1295                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1296                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1297                 }
1298         } else {
1299                 QETH_CARD_TEXT(card, 4, "arpinv");
1300                 rc = 0;
1301         }
1302
1303         return rc;
1304 }
1305
1306 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1307 {
1308         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1309                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1310 }
1311
1312 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1313                 struct qeth_reply *reply, unsigned long data)
1314 {
1315         struct qeth_ipa_cmd *cmd;
1316         struct qeth_arp_query_data *qdata;
1317         struct qeth_arp_query_info *qinfo;
1318         int e;
1319         int entrybytes_done;
1320         int stripped_bytes;
1321         __u8 do_strip_entries;
1322
1323         QETH_CARD_TEXT(card, 3, "arpquecb");
1324
1325         qinfo = (struct qeth_arp_query_info *) reply->param;
1326         cmd = (struct qeth_ipa_cmd *) data;
1327         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1328         if (cmd->hdr.return_code) {
1329                 QETH_CARD_TEXT(card, 4, "arpcberr");
1330                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1331                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1332         }
1333         if (cmd->data.setassparms.hdr.return_code) {
1334                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1335                 QETH_CARD_TEXT(card, 4, "setaperr");
1336                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1337                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1338         }
1339         qdata = &cmd->data.setassparms.data.query_arp;
1340         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1341
1342         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1343         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1344         entrybytes_done = 0;
1345         for (e = 0; e < qdata->no_entries; ++e) {
1346                 char *cur_entry;
1347                 __u32 esize;
1348                 struct qeth_arp_entrytype *etype;
1349
1350                 cur_entry = &qdata->data + entrybytes_done;
1351                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1352                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1353                         QETH_CARD_TEXT(card, 4, "pmis");
1354                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1355                         break;
1356                 }
1357                 esize = get_arp_entry_size(card, qdata, etype,
1358                         do_strip_entries);
1359                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1360                 if (!esize)
1361                         break;
1362
1363                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1364                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1365                         memset(qinfo->udata, 0, 4);
1366                         return -ENOSPC;
1367                 }
1368
1369                 memcpy(qinfo->udata + qinfo->udata_offset,
1370                         &qdata->data + entrybytes_done + stripped_bytes,
1371                         esize);
1372                 entrybytes_done += esize + stripped_bytes;
1373                 qinfo->udata_offset += esize;
1374                 ++qinfo->no_entries;
1375         }
1376         /* check if all replies received ... */
1377         if (cmd->data.setassparms.hdr.seq_no <
1378             cmd->data.setassparms.hdr.number_of_replies)
1379                 return 1;
1380         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1381         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1382         /* keep STRIP_ENTRIES flag so the user program can distinguish
1383          * stripped entries from normal ones */
1384         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1385                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1386         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1387         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1388         return 0;
1389 }
1390
1391 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1392         enum qeth_prot_versions prot,
1393         struct qeth_arp_query_info *qinfo)
1394 {
1395         struct qeth_cmd_buffer *iob;
1396         struct qeth_ipa_cmd *cmd;
1397         int rc;
1398
1399         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1400
1401         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1402                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1403                                        SETASS_DATA_SIZEOF(query_arp), prot);
1404         if (!iob)
1405                 return -ENOMEM;
1406         cmd = __ipa_cmd(iob);
1407         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1408         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1409         if (rc)
1410                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1411                                  CARD_DEVID(card), rc);
1412         return rc;
1413 }
1414
1415 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1416 {
1417         struct qeth_arp_query_info qinfo = {0, };
1418         int rc;
1419
1420         QETH_CARD_TEXT(card, 3, "arpquery");
1421
1422         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1423                                IPA_ARP_PROCESSING)) {
1424                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1425                 rc = -EOPNOTSUPP;
1426                 goto out;
1427         }
1428         /* get size of userspace buffer and mask_bits -> 6 bytes */
1429         if (copy_from_user(&qinfo, udata, 6)) {
1430                 rc = -EFAULT;
1431                 goto out;
1432         }
1433         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1434         if (!qinfo.udata) {
1435                 rc = -ENOMEM;
1436                 goto out;
1437         }
1438         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1439         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1440         if (rc) {
1441                 if (copy_to_user(udata, qinfo.udata, 4))
1442                         rc = -EFAULT;
1443                 goto free_and_out;
1444         }
1445         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1446                 /* fails in case of GuestLAN QDIO mode */
1447                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1448         }
1449         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1450                 QETH_CARD_TEXT(card, 4, "qactf");
1451                 rc = -EFAULT;
1452                 goto free_and_out;
1453         }
1454         QETH_CARD_TEXT(card, 4, "qacts");
1455
1456 free_and_out:
1457         kfree(qinfo.udata);
1458 out:
1459         return rc;
1460 }
1461
1462 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1463                                     struct qeth_arp_cache_entry *entry,
1464                                     enum qeth_arp_process_subcmds arp_cmd)
1465 {
1466         struct qeth_arp_cache_entry *cmd_entry;
1467         struct qeth_cmd_buffer *iob;
1468         int rc;
1469
1470         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1471                 QETH_CARD_TEXT(card, 3, "arpadd");
1472         else
1473                 QETH_CARD_TEXT(card, 3, "arpdel");
1474
1475         /*
1476          * currently GuestLAN only supports the ARP assist function
1477          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1478          * thus we say EOPNOTSUPP for this ARP function
1479          */
1480         if (IS_VM_NIC(card))
1481                 return -EOPNOTSUPP;
1482         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1483                 return -EOPNOTSUPP;
1484         }
1485
1486         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1487                                        SETASS_DATA_SIZEOF(arp_entry),
1488                                        QETH_PROT_IPV4);
1489         if (!iob)
1490                 return -ENOMEM;
1491
1492         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1493         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1494         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1495         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1496         if (rc)
1497                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1498                                  arp_cmd, CARD_DEVID(card), rc);
1499         return rc;
1500 }
1501
1502 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1503 {
1504         struct qeth_cmd_buffer *iob;
1505         int rc;
1506
1507         QETH_CARD_TEXT(card, 3, "arpflush");
1508
1509         /*
1510          * currently GuestLAN only supports the ARP assist function
1511          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1512          * thus we say EOPNOTSUPP for this ARP function
1513         */
1514         if (IS_VM_NIC(card) || IS_IQD(card))
1515                 return -EOPNOTSUPP;
1516         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1517                 return -EOPNOTSUPP;
1518         }
1519
1520         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1521                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1522                                        QETH_PROT_IPV4);
1523         if (!iob)
1524                 return -ENOMEM;
1525
1526         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1527         if (rc)
1528                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1529                                  CARD_DEVID(card), rc);
1530         return rc;
1531 }
1532
1533 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1534 {
1535         struct qeth_card *card = dev->ml_priv;
1536         struct qeth_arp_cache_entry arp_entry;
1537         enum qeth_arp_process_subcmds arp_cmd;
1538         int rc = 0;
1539
1540         switch (cmd) {
1541         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1542                 if (!capable(CAP_NET_ADMIN)) {
1543                         rc = -EPERM;
1544                         break;
1545                 }
1546                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1547                 break;
1548         case SIOC_QETH_ARP_QUERY_INFO:
1549                 if (!capable(CAP_NET_ADMIN)) {
1550                         rc = -EPERM;
1551                         break;
1552                 }
1553                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1554                 break;
1555         case SIOC_QETH_ARP_ADD_ENTRY:
1556         case SIOC_QETH_ARP_REMOVE_ENTRY:
1557                 if (!capable(CAP_NET_ADMIN))
1558                         return -EPERM;
1559                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1560                         return -EFAULT;
1561
1562                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1563                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1564                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1565                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1566         case SIOC_QETH_ARP_FLUSH_CACHE:
1567                 if (!capable(CAP_NET_ADMIN)) {
1568                         rc = -EPERM;
1569                         break;
1570                 }
1571                 rc = qeth_l3_arp_flush_cache(card);
1572                 break;
1573         default:
1574                 rc = -EOPNOTSUPP;
1575         }
1576         return rc;
1577 }
1578
1579 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1580                                      int ipv)
1581 {
1582         struct neighbour *n = NULL;
1583
1584         if (dst)
1585                 n = dst_neigh_lookup_skb(dst, skb);
1586
1587         if (n) {
1588                 int cast_type = n->type;
1589
1590                 neigh_release(n);
1591                 if ((cast_type == RTN_BROADCAST) ||
1592                     (cast_type == RTN_MULTICAST) ||
1593                     (cast_type == RTN_ANYCAST))
1594                         return cast_type;
1595                 return RTN_UNICAST;
1596         }
1597
1598         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1599         switch (ipv) {
1600         case 4:
1601                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1602                         return RTN_BROADCAST;
1603                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1604                                 RTN_MULTICAST : RTN_UNICAST;
1605         case 6:
1606                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1607                                 RTN_MULTICAST : RTN_UNICAST;
1608         default:
1609                 /* ... and MAC address */
1610                 return qeth_get_ether_cast_type(skb);
1611         }
1612 }
1613
1614 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1615 {
1616         int ipv = qeth_get_ip_version(skb);
1617         struct dst_entry *dst;
1618         int cast_type;
1619
1620         rcu_read_lock();
1621         dst = qeth_dst_check_rcu(skb, ipv);
1622         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1623         rcu_read_unlock();
1624
1625         return cast_type;
1626 }
1627
1628 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1629 {
1630         if (cast_type == RTN_MULTICAST)
1631                 return QETH_CAST_MULTICAST;
1632         if (cast_type == RTN_ANYCAST)
1633                 return QETH_CAST_ANYCAST;
1634         if (cast_type == RTN_BROADCAST)
1635                 return QETH_CAST_BROADCAST;
1636         return QETH_CAST_UNICAST;
1637 }
1638
1639 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1640                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1641                                 int ipv, unsigned int data_len)
1642 {
1643         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1644         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1645         struct qeth_card *card = queue->card;
1646         struct dst_entry *dst;
1647         int cast_type;
1648
1649         hdr->hdr.l3.length = data_len;
1650
1651         if (skb_is_gso(skb)) {
1652                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1653         } else {
1654                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1655
1656                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1657                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1658                         l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1659                         memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1660                                iucv_trans_hdr(skb)->destUserID, 8);
1661                         return;
1662                 }
1663
1664                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1665                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1666                         /* some HW requires combined L3+L4 csum offload: */
1667                         if (ipv == 4)
1668                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1669                 }
1670         }
1671
1672         if (ipv == 4 || IS_IQD(card)) {
1673                 /* NETIF_F_HW_VLAN_CTAG_TX */
1674                 if (skb_vlan_tag_present(skb)) {
1675                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1676                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1677                 }
1678         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1679                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1680                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1681         }
1682
1683         rcu_read_lock();
1684         dst = qeth_dst_check_rcu(skb, ipv);
1685
1686         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1687                 cast_type = RTN_UNICAST;
1688         else
1689                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1690         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1691
1692         if (ipv == 4) {
1693                 l3_hdr->next_hop.addr.s6_addr32[3] =
1694                                         qeth_next_hop_v4_rcu(skb, dst);
1695         } else if (ipv == 6) {
1696                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1697
1698                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1699                 if (!IS_IQD(card))
1700                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1701         } else {
1702                 /* OSA only: */
1703                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1704         }
1705         rcu_read_unlock();
1706 }
1707
1708 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1709 {
1710         struct iphdr *iph = ip_hdr(skb);
1711
1712         /* this is safe, IPv6 traffic takes a different path */
1713         if (skb->ip_summed == CHECKSUM_PARTIAL)
1714                 iph->check = 0;
1715         if (skb_is_gso(skb)) {
1716                 iph->tot_len = 0;
1717                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1718                                                     iph->daddr, 0);
1719         }
1720 }
1721
1722 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1723                         struct qeth_qdio_out_q *queue, int ipv)
1724 {
1725         unsigned int hw_hdr_len;
1726         int rc;
1727
1728         /* re-use the L2 header area for the HW header: */
1729         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1730                                        sizeof(struct qeth_hdr);
1731         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1732         if (rc)
1733                 return rc;
1734         skb_pull(skb, ETH_HLEN);
1735
1736         qeth_l3_fixup_headers(skb);
1737         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1738 }
1739
1740 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1741                                            struct net_device *dev)
1742 {
1743         struct qeth_card *card = dev->ml_priv;
1744         u16 txq = skb_get_queue_mapping(skb);
1745         int ipv = qeth_get_ip_version(skb);
1746         struct qeth_qdio_out_q *queue;
1747         int rc;
1748
1749         if (!skb_is_gso(skb))
1750                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1751         if (IS_IQD(card)) {
1752                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1753
1754                 if (card->options.sniffer)
1755                         goto tx_drop;
1756                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1757                     (card->options.cq == QETH_CQ_ENABLED &&
1758                      skb->protocol != htons(ETH_P_AF_IUCV)))
1759                         goto tx_drop;
1760         } else {
1761                 queue = card->qdio.out_qs[txq];
1762         }
1763
1764         if (!(dev->flags & IFF_BROADCAST) &&
1765             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1766                 goto tx_drop;
1767
1768         if (ipv == 4 || IS_IQD(card))
1769                 rc = qeth_l3_xmit(card, skb, queue, ipv);
1770         else
1771                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1772
1773         if (!rc)
1774                 return NETDEV_TX_OK;
1775
1776 tx_drop:
1777         QETH_TXQ_STAT_INC(queue, tx_dropped);
1778         kfree_skb(skb);
1779         return NETDEV_TX_OK;
1780 }
1781
1782 static void qeth_l3_set_rx_mode(struct net_device *dev)
1783 {
1784         struct qeth_card *card = dev->ml_priv;
1785
1786         schedule_work(&card->rx_mode_work);
1787 }
1788
1789 /*
1790  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1791  * NOARP on the netdevice is no option because it also turns off neighbor
1792  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1793  * arp resolution but we want the hard header (packet socket will work
1794  * e.g. tcpdump)
1795  */
1796 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1797 {
1798         n->nud_state = NUD_NOARP;
1799         memcpy(n->ha, "FAKELL", 6);
1800         n->output = n->ops->connected_output;
1801         return 0;
1802 }
1803
1804 static int
1805 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1806 {
1807         if (np->tbl->family == AF_INET)
1808                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1809
1810         return 0;
1811 }
1812
1813 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1814                                                     struct net_device *dev,
1815                                                     netdev_features_t features)
1816 {
1817         if (qeth_get_ip_version(skb) != 4)
1818                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1819         return qeth_features_check(skb, dev, features);
1820 }
1821
1822 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1823                                     struct net_device *sb_dev)
1824 {
1825         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1826                                      sb_dev);
1827 }
1828
1829 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1830                                     struct net_device *sb_dev)
1831 {
1832         struct qeth_card *card = dev->ml_priv;
1833
1834         if (qeth_uses_tx_prio_queueing(card))
1835                 return qeth_get_priority_queue(card, skb);
1836
1837         return netdev_pick_tx(dev, skb, sb_dev);
1838 }
1839
1840 static const struct net_device_ops qeth_l3_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_select_queue       = qeth_l3_iqd_select_queue,
1846         .ndo_validate_addr      = eth_validate_addr,
1847         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1848         .ndo_do_ioctl           = qeth_do_ioctl,
1849         .ndo_fix_features       = qeth_fix_features,
1850         .ndo_set_features       = qeth_set_features,
1851         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1852         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1853         .ndo_tx_timeout         = qeth_tx_timeout,
1854 };
1855
1856 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1857         .ndo_open               = qeth_open,
1858         .ndo_stop               = qeth_stop,
1859         .ndo_get_stats64        = qeth_get_stats64,
1860         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1861         .ndo_features_check     = qeth_l3_osa_features_check,
1862         .ndo_select_queue       = qeth_l3_osa_select_queue,
1863         .ndo_validate_addr      = eth_validate_addr,
1864         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1865         .ndo_do_ioctl           = qeth_do_ioctl,
1866         .ndo_fix_features       = qeth_fix_features,
1867         .ndo_set_features       = qeth_set_features,
1868         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1869         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1870         .ndo_tx_timeout         = qeth_tx_timeout,
1871         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1872 };
1873
1874 static int qeth_l3_setup_netdev(struct qeth_card *card)
1875 {
1876         struct net_device *dev = card->dev;
1877         unsigned int headroom;
1878         int rc;
1879
1880         if (IS_OSD(card) || IS_OSX(card)) {
1881                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1882
1883                 /*IPv6 address autoconfiguration stuff*/
1884                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1885
1886                 if (!IS_VM_NIC(card)) {
1887                         card->dev->features |= NETIF_F_SG;
1888                         card->dev->hw_features |= NETIF_F_TSO |
1889                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1890                         card->dev->vlan_features |= NETIF_F_TSO |
1891                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1892                 }
1893
1894                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1895                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1896                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1897                 }
1898                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1899                         card->dev->hw_features |= NETIF_F_TSO6;
1900                         card->dev->vlan_features |= NETIF_F_TSO6;
1901                 }
1902
1903                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1904                 if (card->dev->hw_features & NETIF_F_TSO6)
1905                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1906                 else if (card->dev->hw_features & NETIF_F_TSO)
1907                         headroom = sizeof(struct qeth_hdr_tso);
1908                 else
1909                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1910         } else if (IS_IQD(card)) {
1911                 card->dev->flags |= IFF_NOARP;
1912                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1913                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1914
1915                 rc = qeth_l3_iqd_read_initial_mac(card);
1916                 if (rc)
1917                         return rc;
1918         } else
1919                 return -ENODEV;
1920
1921         card->dev->needed_headroom = headroom;
1922         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1923                                 NETIF_F_HW_VLAN_CTAG_RX |
1924                                 NETIF_F_HW_VLAN_CTAG_FILTER;
1925
1926         netif_keep_dst(card->dev);
1927         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1928                 netif_set_gso_max_size(card->dev,
1929                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1930
1931         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1932         return register_netdev(card->dev);
1933 }
1934
1935 static const struct device_type qeth_l3_devtype = {
1936         .name = "qeth_layer3",
1937         .groups = qeth_l3_attr_groups,
1938 };
1939
1940 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1941 {
1942         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1943         int rc;
1944
1945         hash_init(card->ip_htable);
1946         mutex_init(&card->ip_lock);
1947         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1948                                                dev_name(&gdev->dev));
1949         if (!card->cmd_wq)
1950                 return -ENOMEM;
1951
1952         if (gdev->dev.type == &qeth_generic_devtype) {
1953                 rc = qeth_l3_create_device_attributes(&gdev->dev);
1954                 if (rc) {
1955                         destroy_workqueue(card->cmd_wq);
1956                         return rc;
1957                 }
1958         }
1959
1960         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1961         return 0;
1962 }
1963
1964 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1965 {
1966         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1967
1968         if (cgdev->dev.type == &qeth_generic_devtype)
1969                 qeth_l3_remove_device_attributes(&cgdev->dev);
1970
1971         qeth_set_allowed_threads(card, 0, 1);
1972         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1973
1974         if (cgdev->state == CCWGROUP_ONLINE)
1975                 qeth_set_offline(card, false);
1976
1977         cancel_work_sync(&card->close_dev_work);
1978         if (card->dev->reg_state == NETREG_REGISTERED)
1979                 unregister_netdev(card->dev);
1980
1981         flush_workqueue(card->cmd_wq);
1982         destroy_workqueue(card->cmd_wq);
1983         qeth_l3_clear_ip_htable(card, 0);
1984         qeth_l3_clear_ipato_list(card);
1985 }
1986
1987 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1988 {
1989         struct net_device *dev = card->dev;
1990         int rc = 0;
1991
1992         /* softsetup */
1993         QETH_CARD_TEXT(card, 2, "softsetp");
1994
1995         rc = qeth_l3_setadapter_parms(card);
1996         if (rc)
1997                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1998         if (!card->options.sniffer) {
1999                 qeth_l3_start_ipassists(card);
2000
2001                 rc = qeth_l3_setrouting_v4(card);
2002                 if (rc)
2003                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2004                 rc = qeth_l3_setrouting_v6(card);
2005                 if (rc)
2006                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2007         }
2008
2009         card->state = CARD_STATE_SOFTSETUP;
2010
2011         qeth_set_allowed_threads(card, 0xffffffff, 0);
2012         qeth_l3_recover_ip(card);
2013
2014         if (dev->reg_state != NETREG_REGISTERED) {
2015                 rc = qeth_l3_setup_netdev(card);
2016                 if (rc)
2017                         goto err_setup;
2018
2019                 if (carrier_ok)
2020                         netif_carrier_on(dev);
2021         } else {
2022                 rtnl_lock();
2023                 rc = qeth_set_real_num_tx_queues(card,
2024                                                  qeth_tx_actual_queues(card));
2025                 if (rc) {
2026                         rtnl_unlock();
2027                         goto err_set_queues;
2028                 }
2029
2030                 if (carrier_ok)
2031                         netif_carrier_on(dev);
2032                 else
2033                         netif_carrier_off(dev);
2034
2035                 netif_device_attach(dev);
2036                 qeth_enable_hw_features(dev);
2037
2038                 if (card->info.open_when_online) {
2039                         card->info.open_when_online = 0;
2040                         dev_open(dev, NULL);
2041                 }
2042                 rtnl_unlock();
2043         }
2044         return 0;
2045
2046 err_set_queues:
2047 err_setup:
2048         qeth_set_allowed_threads(card, 0, 1);
2049         card->state = CARD_STATE_DOWN;
2050         qeth_l3_clear_ip_htable(card, 1);
2051         return rc;
2052 }
2053
2054 static void qeth_l3_set_offline(struct qeth_card *card)
2055 {
2056         qeth_set_allowed_threads(card, 0, 1);
2057         qeth_l3_drain_rx_mode_cache(card);
2058
2059         if (card->options.sniffer &&
2060             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2061                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2062
2063         if (card->state == CARD_STATE_SOFTSETUP) {
2064                 card->state = CARD_STATE_DOWN;
2065                 qeth_l3_clear_ip_htable(card, 1);
2066         }
2067 }
2068
2069 /* Returns zero if the command is successfully "consumed" */
2070 static int qeth_l3_control_event(struct qeth_card *card,
2071                                         struct qeth_ipa_cmd *cmd)
2072 {
2073         return 1;
2074 }
2075
2076 const struct qeth_discipline qeth_l3_discipline = {
2077         .devtype = &qeth_l3_devtype,
2078         .setup = qeth_l3_probe_device,
2079         .remove = qeth_l3_remove_device,
2080         .set_online = qeth_l3_set_online,
2081         .set_offline = qeth_l3_set_offline,
2082         .do_ioctl = qeth_l3_do_ioctl,
2083         .control_event_handler = qeth_l3_control_event,
2084 };
2085 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2086
2087 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2088                                    struct qeth_ipaddr *addr,
2089                                    unsigned long event)
2090 {
2091         switch (event) {
2092         case NETDEV_UP:
2093                 qeth_l3_modify_ip(card, addr, true);
2094                 return NOTIFY_OK;
2095         case NETDEV_DOWN:
2096                 qeth_l3_modify_ip(card, addr, false);
2097                 return NOTIFY_OK;
2098         default:
2099                 return NOTIFY_DONE;
2100         }
2101 }
2102
2103 struct qeth_l3_ip_event_work {
2104         struct work_struct work;
2105         struct qeth_card *card;
2106         struct qeth_ipaddr addr;
2107 };
2108
2109 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2110
2111 static void qeth_l3_add_ip_worker(struct work_struct *work)
2112 {
2113         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2114
2115         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2116         kfree(work);
2117 }
2118
2119 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2120 {
2121         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2122
2123         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2124         kfree(work);
2125 }
2126
2127 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2128 {
2129         if (is_vlan_dev(dev))
2130                 dev = vlan_dev_real_dev(dev);
2131         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2132             dev->netdev_ops == &qeth_l3_netdev_ops)
2133                 return (struct qeth_card *) dev->ml_priv;
2134         return NULL;
2135 }
2136
2137 static int qeth_l3_ip_event(struct notifier_block *this,
2138                             unsigned long event, void *ptr)
2139 {
2140
2141         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2142         struct net_device *dev = ifa->ifa_dev->dev;
2143         struct qeth_ipaddr addr;
2144         struct qeth_card *card;
2145
2146         card = qeth_l3_get_card_from_dev(dev);
2147         if (!card)
2148                 return NOTIFY_DONE;
2149         QETH_CARD_TEXT(card, 3, "ipevent");
2150
2151         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2152         addr.u.a4.addr = ifa->ifa_address;
2153         addr.u.a4.mask = ifa->ifa_mask;
2154
2155         return qeth_l3_handle_ip_event(card, &addr, event);
2156 }
2157
2158 static struct notifier_block qeth_l3_ip_notifier = {
2159         qeth_l3_ip_event,
2160         NULL,
2161 };
2162
2163 static int qeth_l3_ip6_event(struct notifier_block *this,
2164                              unsigned long event, void *ptr)
2165 {
2166         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2167         struct net_device *dev = ifa->idev->dev;
2168         struct qeth_l3_ip_event_work *ip_work;
2169         struct qeth_card *card;
2170
2171         if (event != NETDEV_UP && event != NETDEV_DOWN)
2172                 return NOTIFY_DONE;
2173
2174         card = qeth_l3_get_card_from_dev(dev);
2175         if (!card)
2176                 return NOTIFY_DONE;
2177         QETH_CARD_TEXT(card, 3, "ip6event");
2178         if (!qeth_is_supported(card, IPA_IPV6))
2179                 return NOTIFY_DONE;
2180
2181         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2182         if (!ip_work)
2183                 return NOTIFY_DONE;
2184
2185         if (event == NETDEV_UP)
2186                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2187         else
2188                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2189
2190         ip_work->card = card;
2191         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2192                             QETH_PROT_IPV6);
2193         ip_work->addr.u.a6.addr = ifa->addr;
2194         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2195
2196         queue_work(card->cmd_wq, &ip_work->work);
2197         return NOTIFY_OK;
2198 }
2199
2200 static struct notifier_block qeth_l3_ip6_notifier = {
2201         qeth_l3_ip6_event,
2202         NULL,
2203 };
2204
2205 static int qeth_l3_register_notifiers(void)
2206 {
2207         int rc;
2208
2209         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2210         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2211         if (rc)
2212                 return rc;
2213         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2214         if (rc) {
2215                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2216                 return rc;
2217         }
2218         return 0;
2219 }
2220
2221 static void qeth_l3_unregister_notifiers(void)
2222 {
2223         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2224         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2225         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2226 }
2227
2228 static int __init qeth_l3_init(void)
2229 {
2230         pr_info("register layer 3 discipline\n");
2231         return qeth_l3_register_notifiers();
2232 }
2233
2234 static void __exit qeth_l3_exit(void)
2235 {
2236         qeth_l3_unregister_notifiers();
2237         pr_info("unregister layer 3 discipline\n");
2238 }
2239
2240 module_init(qeth_l3_init);
2241 module_exit(qeth_l3_exit);
2242 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2243 MODULE_DESCRIPTION("qeth layer 3 discipline");
2244 MODULE_LICENSE("GPL");