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