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_stop_card(struct qeth_card *card)
1146 {
1147         QETH_CARD_TEXT(card, 2, "stopcard");
1148
1149         qeth_set_allowed_threads(card, 0, 1);
1150
1151         cancel_work_sync(&card->rx_mode_work);
1152         qeth_l3_drain_rx_mode_cache(card);
1153
1154         if (card->options.sniffer &&
1155             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1156                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1157
1158         if (card->state == CARD_STATE_SOFTSETUP) {
1159                 card->state = CARD_STATE_DOWN;
1160                 qeth_l3_clear_ip_htable(card, 1);
1161         }
1162
1163         qeth_qdio_clear_card(card, 0);
1164         qeth_drain_output_queues(card);
1165         qeth_clear_working_pool_list(card);
1166         flush_workqueue(card->event_wq);
1167         qeth_flush_local_addrs(card);
1168         card->info.promisc_mode = 0;
1169 }
1170
1171 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1172 {
1173         bool enable = card->dev->flags & IFF_PROMISC;
1174
1175         if (card->info.promisc_mode == enable)
1176                 return;
1177
1178         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1179                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1180                         qeth_setadp_promisc_mode(card, enable);
1181         } else if (card->options.sniffer &&     /* HiperSockets trace */
1182                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1183                 if (enable) {
1184                         QETH_CARD_TEXT(card, 3, "+promisc");
1185                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1186                 } else {
1187                         QETH_CARD_TEXT(card, 3, "-promisc");
1188                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1189                 }
1190         }
1191 }
1192
1193 static void qeth_l3_rx_mode_work(struct work_struct *work)
1194 {
1195         struct qeth_card *card = container_of(work, struct qeth_card,
1196                                               rx_mode_work);
1197         struct qeth_ipaddr *addr;
1198         struct hlist_node *tmp;
1199         int i, rc;
1200
1201         QETH_CARD_TEXT(card, 3, "setmulti");
1202
1203         if (!card->options.sniffer) {
1204                 rtnl_lock();
1205                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1206                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1207                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1208                 rtnl_unlock();
1209
1210                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1211                         switch (addr->disp_flag) {
1212                         case QETH_DISP_ADDR_DELETE:
1213                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1214                                 if (!rc || rc == -ENOENT) {
1215                                         hash_del(&addr->hnode);
1216                                         kfree(addr);
1217                                 }
1218                                 break;
1219                         case QETH_DISP_ADDR_ADD:
1220                                 rc = qeth_l3_register_addr_entry(card, addr);
1221                                 if (rc && rc != -ENETDOWN) {
1222                                         hash_del(&addr->hnode);
1223                                         kfree(addr);
1224                                         break;
1225                                 }
1226                                 fallthrough;
1227                         default:
1228                                 /* for next call to set_rx_mode(): */
1229                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1230                         }
1231                 }
1232         }
1233
1234         qeth_l3_set_promisc_mode(card);
1235 }
1236
1237 static int qeth_l3_arp_makerc(u16 rc)
1238 {
1239         switch (rc) {
1240         case IPA_RC_SUCCESS:
1241                 return 0;
1242         case QETH_IPA_ARP_RC_NOTSUPP:
1243         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1244                 return -EOPNOTSUPP;
1245         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1246                 return -EINVAL;
1247         case QETH_IPA_ARP_RC_Q_NO_DATA:
1248                 return -ENOENT;
1249         default:
1250                 return -EIO;
1251         }
1252 }
1253
1254 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1255                               unsigned long data)
1256 {
1257         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1258
1259         qeth_setassparms_cb(card, reply, data);
1260         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1261 }
1262
1263 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1264 {
1265         struct qeth_cmd_buffer *iob;
1266         int rc;
1267
1268         QETH_CARD_TEXT(card, 3, "arpstnoe");
1269
1270         /*
1271          * currently GuestLAN only supports the ARP assist function
1272          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1273          * thus we say EOPNOTSUPP for this ARP function
1274          */
1275         if (IS_VM_NIC(card))
1276                 return -EOPNOTSUPP;
1277         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1278                 return -EOPNOTSUPP;
1279         }
1280
1281         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1282                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1283                                        SETASS_DATA_SIZEOF(flags_32bit),
1284                                        QETH_PROT_IPV4);
1285         if (!iob)
1286                 return -ENOMEM;
1287
1288         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1289         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1290         if (rc)
1291                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1292                                  CARD_DEVID(card), rc);
1293         return rc;
1294 }
1295
1296 static __u32 get_arp_entry_size(struct qeth_card *card,
1297                         struct qeth_arp_query_data *qdata,
1298                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1299 {
1300         __u32 rc;
1301         __u8 is_hsi;
1302
1303         is_hsi = qdata->reply_bits == 5;
1304         if (type->ip == QETHARP_IP_ADDR_V4) {
1305                 QETH_CARD_TEXT(card, 4, "arpev4");
1306                 if (strip_entries) {
1307                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1308                                 sizeof(struct qeth_arp_qi_entry7_short);
1309                 } else {
1310                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1311                                 sizeof(struct qeth_arp_qi_entry7);
1312                 }
1313         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1314                 QETH_CARD_TEXT(card, 4, "arpev6");
1315                 if (strip_entries) {
1316                         rc = is_hsi ?
1317                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1318                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1319                 } else {
1320                         rc = is_hsi ?
1321                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1322                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1323                 }
1324         } else {
1325                 QETH_CARD_TEXT(card, 4, "arpinv");
1326                 rc = 0;
1327         }
1328
1329         return rc;
1330 }
1331
1332 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1333 {
1334         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1335                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1336 }
1337
1338 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1339                 struct qeth_reply *reply, unsigned long data)
1340 {
1341         struct qeth_ipa_cmd *cmd;
1342         struct qeth_arp_query_data *qdata;
1343         struct qeth_arp_query_info *qinfo;
1344         int e;
1345         int entrybytes_done;
1346         int stripped_bytes;
1347         __u8 do_strip_entries;
1348
1349         QETH_CARD_TEXT(card, 3, "arpquecb");
1350
1351         qinfo = (struct qeth_arp_query_info *) reply->param;
1352         cmd = (struct qeth_ipa_cmd *) data;
1353         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1354         if (cmd->hdr.return_code) {
1355                 QETH_CARD_TEXT(card, 4, "arpcberr");
1356                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1357                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1358         }
1359         if (cmd->data.setassparms.hdr.return_code) {
1360                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1361                 QETH_CARD_TEXT(card, 4, "setaperr");
1362                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1363                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1364         }
1365         qdata = &cmd->data.setassparms.data.query_arp;
1366         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1367
1368         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1369         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1370         entrybytes_done = 0;
1371         for (e = 0; e < qdata->no_entries; ++e) {
1372                 char *cur_entry;
1373                 __u32 esize;
1374                 struct qeth_arp_entrytype *etype;
1375
1376                 cur_entry = &qdata->data + entrybytes_done;
1377                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1378                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1379                         QETH_CARD_TEXT(card, 4, "pmis");
1380                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1381                         break;
1382                 }
1383                 esize = get_arp_entry_size(card, qdata, etype,
1384                         do_strip_entries);
1385                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1386                 if (!esize)
1387                         break;
1388
1389                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1390                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1391                         memset(qinfo->udata, 0, 4);
1392                         return -ENOSPC;
1393                 }
1394
1395                 memcpy(qinfo->udata + qinfo->udata_offset,
1396                         &qdata->data + entrybytes_done + stripped_bytes,
1397                         esize);
1398                 entrybytes_done += esize + stripped_bytes;
1399                 qinfo->udata_offset += esize;
1400                 ++qinfo->no_entries;
1401         }
1402         /* check if all replies received ... */
1403         if (cmd->data.setassparms.hdr.seq_no <
1404             cmd->data.setassparms.hdr.number_of_replies)
1405                 return 1;
1406         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1407         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1408         /* keep STRIP_ENTRIES flag so the user program can distinguish
1409          * stripped entries from normal ones */
1410         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1411                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1412         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1413         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1414         return 0;
1415 }
1416
1417 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1418         enum qeth_prot_versions prot,
1419         struct qeth_arp_query_info *qinfo)
1420 {
1421         struct qeth_cmd_buffer *iob;
1422         struct qeth_ipa_cmd *cmd;
1423         int rc;
1424
1425         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1426
1427         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1428                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1429                                        SETASS_DATA_SIZEOF(query_arp), prot);
1430         if (!iob)
1431                 return -ENOMEM;
1432         cmd = __ipa_cmd(iob);
1433         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1434         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1435         if (rc)
1436                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1437                                  CARD_DEVID(card), rc);
1438         return rc;
1439 }
1440
1441 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1442 {
1443         struct qeth_arp_query_info qinfo = {0, };
1444         int rc;
1445
1446         QETH_CARD_TEXT(card, 3, "arpquery");
1447
1448         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1449                                IPA_ARP_PROCESSING)) {
1450                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1451                 rc = -EOPNOTSUPP;
1452                 goto out;
1453         }
1454         /* get size of userspace buffer and mask_bits -> 6 bytes */
1455         if (copy_from_user(&qinfo, udata, 6)) {
1456                 rc = -EFAULT;
1457                 goto out;
1458         }
1459         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1460         if (!qinfo.udata) {
1461                 rc = -ENOMEM;
1462                 goto out;
1463         }
1464         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1465         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1466         if (rc) {
1467                 if (copy_to_user(udata, qinfo.udata, 4))
1468                         rc = -EFAULT;
1469                 goto free_and_out;
1470         }
1471         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1472                 /* fails in case of GuestLAN QDIO mode */
1473                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1474         }
1475         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1476                 QETH_CARD_TEXT(card, 4, "qactf");
1477                 rc = -EFAULT;
1478                 goto free_and_out;
1479         }
1480         QETH_CARD_TEXT(card, 4, "qacts");
1481
1482 free_and_out:
1483         kfree(qinfo.udata);
1484 out:
1485         return rc;
1486 }
1487
1488 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1489                                     struct qeth_arp_cache_entry *entry,
1490                                     enum qeth_arp_process_subcmds arp_cmd)
1491 {
1492         struct qeth_arp_cache_entry *cmd_entry;
1493         struct qeth_cmd_buffer *iob;
1494         int rc;
1495
1496         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1497                 QETH_CARD_TEXT(card, 3, "arpadd");
1498         else
1499                 QETH_CARD_TEXT(card, 3, "arpdel");
1500
1501         /*
1502          * currently GuestLAN only supports the ARP assist function
1503          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1504          * thus we say EOPNOTSUPP for this ARP function
1505          */
1506         if (IS_VM_NIC(card))
1507                 return -EOPNOTSUPP;
1508         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1509                 return -EOPNOTSUPP;
1510         }
1511
1512         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1513                                        SETASS_DATA_SIZEOF(arp_entry),
1514                                        QETH_PROT_IPV4);
1515         if (!iob)
1516                 return -ENOMEM;
1517
1518         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1519         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1520         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1521         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1522         if (rc)
1523                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1524                                  arp_cmd, CARD_DEVID(card), rc);
1525         return rc;
1526 }
1527
1528 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1529 {
1530         struct qeth_cmd_buffer *iob;
1531         int rc;
1532
1533         QETH_CARD_TEXT(card, 3, "arpflush");
1534
1535         /*
1536          * currently GuestLAN only supports the ARP assist function
1537          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1538          * thus we say EOPNOTSUPP for this ARP function
1539         */
1540         if (IS_VM_NIC(card) || IS_IQD(card))
1541                 return -EOPNOTSUPP;
1542         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1543                 return -EOPNOTSUPP;
1544         }
1545
1546         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1547                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1548                                        QETH_PROT_IPV4);
1549         if (!iob)
1550                 return -ENOMEM;
1551
1552         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1553         if (rc)
1554                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1555                                  CARD_DEVID(card), rc);
1556         return rc;
1557 }
1558
1559 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1560 {
1561         struct qeth_card *card = dev->ml_priv;
1562         struct qeth_arp_cache_entry arp_entry;
1563         enum qeth_arp_process_subcmds arp_cmd;
1564         int rc = 0;
1565
1566         switch (cmd) {
1567         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1568                 if (!capable(CAP_NET_ADMIN)) {
1569                         rc = -EPERM;
1570                         break;
1571                 }
1572                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1573                 break;
1574         case SIOC_QETH_ARP_QUERY_INFO:
1575                 if (!capable(CAP_NET_ADMIN)) {
1576                         rc = -EPERM;
1577                         break;
1578                 }
1579                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1580                 break;
1581         case SIOC_QETH_ARP_ADD_ENTRY:
1582         case SIOC_QETH_ARP_REMOVE_ENTRY:
1583                 if (!capable(CAP_NET_ADMIN))
1584                         return -EPERM;
1585                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1586                         return -EFAULT;
1587
1588                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1589                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1590                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1591                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1592         case SIOC_QETH_ARP_FLUSH_CACHE:
1593                 if (!capable(CAP_NET_ADMIN)) {
1594                         rc = -EPERM;
1595                         break;
1596                 }
1597                 rc = qeth_l3_arp_flush_cache(card);
1598                 break;
1599         default:
1600                 rc = -EOPNOTSUPP;
1601         }
1602         return rc;
1603 }
1604
1605 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1606                                      int ipv)
1607 {
1608         struct neighbour *n = NULL;
1609
1610         if (dst)
1611                 n = dst_neigh_lookup_skb(dst, skb);
1612
1613         if (n) {
1614                 int cast_type = n->type;
1615
1616                 neigh_release(n);
1617                 if ((cast_type == RTN_BROADCAST) ||
1618                     (cast_type == RTN_MULTICAST) ||
1619                     (cast_type == RTN_ANYCAST))
1620                         return cast_type;
1621                 return RTN_UNICAST;
1622         }
1623
1624         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1625         switch (ipv) {
1626         case 4:
1627                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1628                         return RTN_BROADCAST;
1629                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1630                                 RTN_MULTICAST : RTN_UNICAST;
1631         case 6:
1632                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1633                                 RTN_MULTICAST : RTN_UNICAST;
1634         default:
1635                 /* ... and MAC address */
1636                 return qeth_get_ether_cast_type(skb);
1637         }
1638 }
1639
1640 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1641 {
1642         int ipv = qeth_get_ip_version(skb);
1643         struct dst_entry *dst;
1644         int cast_type;
1645
1646         rcu_read_lock();
1647         dst = qeth_dst_check_rcu(skb, ipv);
1648         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1649         rcu_read_unlock();
1650
1651         return cast_type;
1652 }
1653
1654 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1655 {
1656         if (cast_type == RTN_MULTICAST)
1657                 return QETH_CAST_MULTICAST;
1658         if (cast_type == RTN_ANYCAST)
1659                 return QETH_CAST_ANYCAST;
1660         if (cast_type == RTN_BROADCAST)
1661                 return QETH_CAST_BROADCAST;
1662         return QETH_CAST_UNICAST;
1663 }
1664
1665 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1666                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1667                                 int ipv, unsigned int data_len)
1668 {
1669         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1670         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1671         struct qeth_card *card = queue->card;
1672         struct dst_entry *dst;
1673         int cast_type;
1674
1675         hdr->hdr.l3.length = data_len;
1676
1677         if (skb_is_gso(skb)) {
1678                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1679         } else {
1680                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1681
1682                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1683                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1684                         l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1685                         memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1686                                iucv_trans_hdr(skb)->destUserID, 8);
1687                         return;
1688                 }
1689
1690                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1691                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1692                         /* some HW requires combined L3+L4 csum offload: */
1693                         if (ipv == 4)
1694                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1695                 }
1696         }
1697
1698         if (ipv == 4 || IS_IQD(card)) {
1699                 /* NETIF_F_HW_VLAN_CTAG_TX */
1700                 if (skb_vlan_tag_present(skb)) {
1701                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1702                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1703                 }
1704         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1705                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1706                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1707         }
1708
1709         rcu_read_lock();
1710         dst = qeth_dst_check_rcu(skb, ipv);
1711
1712         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1713                 cast_type = RTN_UNICAST;
1714         else
1715                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1716         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1717
1718         if (ipv == 4) {
1719                 l3_hdr->next_hop.addr.s6_addr32[3] =
1720                                         qeth_next_hop_v4_rcu(skb, dst);
1721         } else if (ipv == 6) {
1722                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1723
1724                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1725                 if (!IS_IQD(card))
1726                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1727         } else {
1728                 /* OSA only: */
1729                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1730         }
1731         rcu_read_unlock();
1732 }
1733
1734 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1735 {
1736         struct iphdr *iph = ip_hdr(skb);
1737
1738         /* this is safe, IPv6 traffic takes a different path */
1739         if (skb->ip_summed == CHECKSUM_PARTIAL)
1740                 iph->check = 0;
1741         if (skb_is_gso(skb)) {
1742                 iph->tot_len = 0;
1743                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1744                                                     iph->daddr, 0);
1745         }
1746 }
1747
1748 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1749                         struct qeth_qdio_out_q *queue, int ipv)
1750 {
1751         unsigned int hw_hdr_len;
1752         int rc;
1753
1754         /* re-use the L2 header area for the HW header: */
1755         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1756                                        sizeof(struct qeth_hdr);
1757         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1758         if (rc)
1759                 return rc;
1760         skb_pull(skb, ETH_HLEN);
1761
1762         qeth_l3_fixup_headers(skb);
1763         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1764 }
1765
1766 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1767                                            struct net_device *dev)
1768 {
1769         struct qeth_card *card = dev->ml_priv;
1770         u16 txq = skb_get_queue_mapping(skb);
1771         int ipv = qeth_get_ip_version(skb);
1772         struct qeth_qdio_out_q *queue;
1773         int rc;
1774
1775         if (!skb_is_gso(skb))
1776                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1777         if (IS_IQD(card)) {
1778                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1779
1780                 if (card->options.sniffer)
1781                         goto tx_drop;
1782                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1783                     (card->options.cq == QETH_CQ_ENABLED &&
1784                      skb->protocol != htons(ETH_P_AF_IUCV)))
1785                         goto tx_drop;
1786         } else {
1787                 queue = card->qdio.out_qs[txq];
1788         }
1789
1790         if (!(dev->flags & IFF_BROADCAST) &&
1791             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1792                 goto tx_drop;
1793
1794         if (ipv == 4 || IS_IQD(card))
1795                 rc = qeth_l3_xmit(card, skb, queue, ipv);
1796         else
1797                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1798
1799         if (!rc)
1800                 return NETDEV_TX_OK;
1801
1802 tx_drop:
1803         QETH_TXQ_STAT_INC(queue, tx_dropped);
1804         kfree_skb(skb);
1805         return NETDEV_TX_OK;
1806 }
1807
1808 static void qeth_l3_set_rx_mode(struct net_device *dev)
1809 {
1810         struct qeth_card *card = dev->ml_priv;
1811
1812         schedule_work(&card->rx_mode_work);
1813 }
1814
1815 /*
1816  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1817  * NOARP on the netdevice is no option because it also turns off neighbor
1818  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1819  * arp resolution but we want the hard header (packet socket will work
1820  * e.g. tcpdump)
1821  */
1822 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1823 {
1824         n->nud_state = NUD_NOARP;
1825         memcpy(n->ha, "FAKELL", 6);
1826         n->output = n->ops->connected_output;
1827         return 0;
1828 }
1829
1830 static int
1831 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1832 {
1833         if (np->tbl->family == AF_INET)
1834                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1835
1836         return 0;
1837 }
1838
1839 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1840                                                     struct net_device *dev,
1841                                                     netdev_features_t features)
1842 {
1843         if (qeth_get_ip_version(skb) != 4)
1844                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1845         return qeth_features_check(skb, dev, features);
1846 }
1847
1848 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1849                                     struct net_device *sb_dev)
1850 {
1851         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1852                                      sb_dev);
1853 }
1854
1855 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1856                                     struct net_device *sb_dev)
1857 {
1858         struct qeth_card *card = dev->ml_priv;
1859
1860         return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
1861                                  qeth_get_priority_queue(card, skb);
1862 }
1863
1864 static const struct net_device_ops qeth_l3_netdev_ops = {
1865         .ndo_open               = qeth_open,
1866         .ndo_stop               = qeth_stop,
1867         .ndo_get_stats64        = qeth_get_stats64,
1868         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1869         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1870         .ndo_validate_addr      = eth_validate_addr,
1871         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1872         .ndo_do_ioctl           = qeth_do_ioctl,
1873         .ndo_fix_features       = qeth_fix_features,
1874         .ndo_set_features       = qeth_set_features,
1875         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1876         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1877         .ndo_tx_timeout         = qeth_tx_timeout,
1878 };
1879
1880 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1881         .ndo_open               = qeth_open,
1882         .ndo_stop               = qeth_stop,
1883         .ndo_get_stats64        = qeth_get_stats64,
1884         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1885         .ndo_features_check     = qeth_l3_osa_features_check,
1886         .ndo_select_queue       = qeth_l3_osa_select_queue,
1887         .ndo_validate_addr      = eth_validate_addr,
1888         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1889         .ndo_do_ioctl           = qeth_do_ioctl,
1890         .ndo_fix_features       = qeth_fix_features,
1891         .ndo_set_features       = qeth_set_features,
1892         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1893         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1894         .ndo_tx_timeout         = qeth_tx_timeout,
1895         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1896 };
1897
1898 static int qeth_l3_setup_netdev(struct qeth_card *card)
1899 {
1900         struct net_device *dev = card->dev;
1901         unsigned int headroom;
1902         int rc;
1903
1904         rc = qeth_setup_netdev(card);
1905         if (rc)
1906                 return rc;
1907
1908         if (IS_OSD(card) || IS_OSX(card)) {
1909                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1910
1911                 /*IPv6 address autoconfiguration stuff*/
1912                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1913
1914                 if (!IS_VM_NIC(card)) {
1915                         card->dev->features |= NETIF_F_SG;
1916                         card->dev->hw_features |= NETIF_F_TSO |
1917                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1918                         card->dev->vlan_features |= NETIF_F_TSO |
1919                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1920                 }
1921
1922                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1923                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1924                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1925                 }
1926                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1927                         card->dev->hw_features |= NETIF_F_TSO6;
1928                         card->dev->vlan_features |= NETIF_F_TSO6;
1929                 }
1930
1931                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1932                 if (card->dev->hw_features & NETIF_F_TSO6)
1933                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1934                 else if (card->dev->hw_features & NETIF_F_TSO)
1935                         headroom = sizeof(struct qeth_hdr_tso);
1936                 else
1937                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1938         } else if (IS_IQD(card)) {
1939                 card->dev->flags |= IFF_NOARP;
1940                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1941                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1942
1943                 rc = qeth_l3_iqd_read_initial_mac(card);
1944                 if (rc)
1945                         return rc;
1946         } else
1947                 return -ENODEV;
1948
1949         card->dev->needed_headroom = headroom;
1950         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1951                                 NETIF_F_HW_VLAN_CTAG_RX |
1952                                 NETIF_F_HW_VLAN_CTAG_FILTER;
1953
1954         netif_keep_dst(card->dev);
1955         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1956                 netif_set_gso_max_size(card->dev,
1957                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1958
1959         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1960         return register_netdev(card->dev);
1961 }
1962
1963 static const struct device_type qeth_l3_devtype = {
1964         .name = "qeth_layer3",
1965         .groups = qeth_l3_attr_groups,
1966 };
1967
1968 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1969 {
1970         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1971         int rc;
1972
1973         hash_init(card->ip_htable);
1974         mutex_init(&card->ip_lock);
1975         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1976                                                dev_name(&gdev->dev));
1977         if (!card->cmd_wq)
1978                 return -ENOMEM;
1979
1980         if (gdev->dev.type == &qeth_generic_devtype) {
1981                 rc = qeth_l3_create_device_attributes(&gdev->dev);
1982                 if (rc) {
1983                         destroy_workqueue(card->cmd_wq);
1984                         return rc;
1985                 }
1986         }
1987
1988         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1989         return 0;
1990 }
1991
1992 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1993 {
1994         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1995
1996         if (cgdev->dev.type == &qeth_generic_devtype)
1997                 qeth_l3_remove_device_attributes(&cgdev->dev);
1998
1999         qeth_set_allowed_threads(card, 0, 1);
2000         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2001
2002         if (cgdev->state == CCWGROUP_ONLINE)
2003                 qeth_set_offline(card, false);
2004
2005         cancel_work_sync(&card->close_dev_work);
2006         if (card->dev->reg_state == NETREG_REGISTERED)
2007                 unregister_netdev(card->dev);
2008
2009         flush_workqueue(card->cmd_wq);
2010         destroy_workqueue(card->cmd_wq);
2011         qeth_l3_clear_ip_htable(card, 0);
2012         qeth_l3_clear_ipato_list(card);
2013 }
2014
2015 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
2016 {
2017         struct net_device *dev = card->dev;
2018         int rc = 0;
2019
2020         /* softsetup */
2021         QETH_CARD_TEXT(card, 2, "softsetp");
2022
2023         rc = qeth_l3_setadapter_parms(card);
2024         if (rc)
2025                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2026         if (!card->options.sniffer) {
2027                 qeth_l3_start_ipassists(card);
2028
2029                 rc = qeth_l3_setrouting_v4(card);
2030                 if (rc)
2031                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2032                 rc = qeth_l3_setrouting_v6(card);
2033                 if (rc)
2034                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2035         }
2036
2037         card->state = CARD_STATE_SOFTSETUP;
2038
2039         qeth_set_allowed_threads(card, 0xffffffff, 0);
2040         qeth_l3_recover_ip(card);
2041
2042         if (dev->reg_state != NETREG_REGISTERED) {
2043                 rc = qeth_l3_setup_netdev(card);
2044                 if (rc)
2045                         goto out_remove;
2046
2047                 if (carrier_ok)
2048                         netif_carrier_on(dev);
2049         } else {
2050                 rtnl_lock();
2051                 if (carrier_ok)
2052                         netif_carrier_on(dev);
2053                 else
2054                         netif_carrier_off(dev);
2055
2056                 netif_device_attach(dev);
2057                 qeth_enable_hw_features(dev);
2058
2059                 if (card->info.open_when_online) {
2060                         card->info.open_when_online = 0;
2061                         dev_open(dev, NULL);
2062                 }
2063                 rtnl_unlock();
2064         }
2065         return 0;
2066
2067 out_remove:
2068         qeth_l3_stop_card(card);
2069         return rc;
2070 }
2071
2072 static void qeth_l3_set_offline(struct qeth_card *card)
2073 {
2074         qeth_l3_stop_card(card);
2075 }
2076
2077 /* Returns zero if the command is successfully "consumed" */
2078 static int qeth_l3_control_event(struct qeth_card *card,
2079                                         struct qeth_ipa_cmd *cmd)
2080 {
2081         return 1;
2082 }
2083
2084 struct qeth_discipline qeth_l3_discipline = {
2085         .devtype = &qeth_l3_devtype,
2086         .setup = qeth_l3_probe_device,
2087         .remove = qeth_l3_remove_device,
2088         .set_online = qeth_l3_set_online,
2089         .set_offline = qeth_l3_set_offline,
2090         .do_ioctl = qeth_l3_do_ioctl,
2091         .control_event_handler = qeth_l3_control_event,
2092 };
2093 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2094
2095 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2096                                    struct qeth_ipaddr *addr,
2097                                    unsigned long event)
2098 {
2099         switch (event) {
2100         case NETDEV_UP:
2101                 qeth_l3_modify_ip(card, addr, true);
2102                 return NOTIFY_OK;
2103         case NETDEV_DOWN:
2104                 qeth_l3_modify_ip(card, addr, false);
2105                 return NOTIFY_OK;
2106         default:
2107                 return NOTIFY_DONE;
2108         }
2109 }
2110
2111 struct qeth_l3_ip_event_work {
2112         struct work_struct work;
2113         struct qeth_card *card;
2114         struct qeth_ipaddr addr;
2115 };
2116
2117 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2118
2119 static void qeth_l3_add_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, true);
2124         kfree(work);
2125 }
2126
2127 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2128 {
2129         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2130
2131         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2132         kfree(work);
2133 }
2134
2135 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2136 {
2137         if (is_vlan_dev(dev))
2138                 dev = vlan_dev_real_dev(dev);
2139         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2140             dev->netdev_ops == &qeth_l3_netdev_ops)
2141                 return (struct qeth_card *) dev->ml_priv;
2142         return NULL;
2143 }
2144
2145 static int qeth_l3_ip_event(struct notifier_block *this,
2146                             unsigned long event, void *ptr)
2147 {
2148
2149         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2150         struct net_device *dev = ifa->ifa_dev->dev;
2151         struct qeth_ipaddr addr;
2152         struct qeth_card *card;
2153
2154         card = qeth_l3_get_card_from_dev(dev);
2155         if (!card)
2156                 return NOTIFY_DONE;
2157         QETH_CARD_TEXT(card, 3, "ipevent");
2158
2159         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2160         addr.u.a4.addr = ifa->ifa_address;
2161         addr.u.a4.mask = ifa->ifa_mask;
2162
2163         return qeth_l3_handle_ip_event(card, &addr, event);
2164 }
2165
2166 static struct notifier_block qeth_l3_ip_notifier = {
2167         qeth_l3_ip_event,
2168         NULL,
2169 };
2170
2171 static int qeth_l3_ip6_event(struct notifier_block *this,
2172                              unsigned long event, void *ptr)
2173 {
2174         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2175         struct net_device *dev = ifa->idev->dev;
2176         struct qeth_l3_ip_event_work *ip_work;
2177         struct qeth_card *card;
2178
2179         if (event != NETDEV_UP && event != NETDEV_DOWN)
2180                 return NOTIFY_DONE;
2181
2182         card = qeth_l3_get_card_from_dev(dev);
2183         if (!card)
2184                 return NOTIFY_DONE;
2185         QETH_CARD_TEXT(card, 3, "ip6event");
2186         if (!qeth_is_supported(card, IPA_IPV6))
2187                 return NOTIFY_DONE;
2188
2189         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2190         if (!ip_work)
2191                 return NOTIFY_DONE;
2192
2193         if (event == NETDEV_UP)
2194                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2195         else
2196                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2197
2198         ip_work->card = card;
2199         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2200                             QETH_PROT_IPV6);
2201         ip_work->addr.u.a6.addr = ifa->addr;
2202         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2203
2204         queue_work(card->cmd_wq, &ip_work->work);
2205         return NOTIFY_OK;
2206 }
2207
2208 static struct notifier_block qeth_l3_ip6_notifier = {
2209         qeth_l3_ip6_event,
2210         NULL,
2211 };
2212
2213 static int qeth_l3_register_notifiers(void)
2214 {
2215         int rc;
2216
2217         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2218         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2219         if (rc)
2220                 return rc;
2221         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2222         if (rc) {
2223                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2224                 return rc;
2225         }
2226         return 0;
2227 }
2228
2229 static void qeth_l3_unregister_notifiers(void)
2230 {
2231         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2232         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2233         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2234 }
2235
2236 static int __init qeth_l3_init(void)
2237 {
2238         pr_info("register layer 3 discipline\n");
2239         return qeth_l3_register_notifiers();
2240 }
2241
2242 static void __exit qeth_l3_exit(void)
2243 {
2244         qeth_l3_unregister_notifiers();
2245         pr_info("unregister layer 3 discipline\n");
2246 }
2247
2248 module_init(qeth_l3_init);
2249 module_exit(qeth_l3_exit);
2250 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2251 MODULE_DESCRIPTION("qeth layer 3 discipline");
2252 MODULE_LICENSE("GPL");