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 <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   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
  41 static int qeth_l3_set_offline(struct ccwgroup_device *);
  42 static void qeth_l3_set_rx_mode(struct net_device *dev);
  43 static int qeth_l3_register_addr_entry(struct qeth_card *,
  44                 struct qeth_ipaddr *);
  45 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  46                 struct qeth_ipaddr *);
  47
  48 static void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
  49 {
  50         sprintf(buf, "%pI4", addr);
  51 }
  52
  53 static void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
  54 {
  55         sprintf(buf, "%pI6", addr);
  56 }
  57
  58 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
  59                                 char *buf)
  60 {
  61         if (proto == QETH_PROT_IPV4)
  62                 qeth_l3_ipaddr4_to_string(addr, buf);
  63         else if (proto == QETH_PROT_IPV6)
  64                 qeth_l3_ipaddr6_to_string(addr, buf);
  65 }
  66
  67 static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
  68 {
  69         struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
  70
  71         if (addr)
  72                 qeth_l3_init_ipaddr(addr, QETH_IP_TYPE_NORMAL, prot);
  73         return addr;
  74 }
  75
  76 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  77                                                    struct qeth_ipaddr *query)
  78 {
  79         u32 key = qeth_l3_ipaddr_hash(query);
  80         struct qeth_ipaddr *addr;
  81
  82         if (query->is_multicast) {
  83                 hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
  84                         if (qeth_l3_addr_match_ip(addr, query))
  85                                 return addr;
  86         } else {
  87                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  88                         if (qeth_l3_addr_match_ip(addr, query))
  89                                 return addr;
  90         }
  91         return NULL;
  92 }
  93
  94 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  95 {
  96         int i, j;
  97         u8 octet;
  98
  99         for (i = 0; i < len; ++i) {
 100                 octet = addr[i];
 101                 for (j = 7; j >= 0; --j) {
 102                         bits[i*8 + j] = octet & 1;
 103                         octet >>= 1;
 104                 }
 105         }
 106 }
 107
 108 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
 109                                              struct qeth_ipaddr *addr)
 110 {
 111         struct qeth_ipato_entry *ipatoe;
 112         u8 addr_bits[128] = {0, };
 113         u8 ipatoe_bits[128] = {0, };
 114         int rc = 0;
 115
 116         if (!card->ipato.enabled)
 117                 return false;
 118         if (addr->type != QETH_IP_TYPE_NORMAL)
 119                 return false;
 120
 121         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 122                                   (addr->proto == QETH_PROT_IPV4)? 4:16);
 123         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 124                 if (addr->proto != ipatoe->proto)
 125                         continue;
 126                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 127                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 128                                           4 : 16);
 129                 if (addr->proto == QETH_PROT_IPV4)
 130                         rc = !memcmp(addr_bits, ipatoe_bits,
 131                                      min(32, ipatoe->mask_bits));
 132                 else
 133                         rc = !memcmp(addr_bits, ipatoe_bits,
 134                                      min(128, ipatoe->mask_bits));
 135                 if (rc)
 136                         break;
 137         }
 138         /* invert? */
 139         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 140                 rc = !rc;
 141         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 142                 rc = !rc;
 143
 144         return rc;
 145 }
 146
 147 static int qeth_l3_delete_ip(struct qeth_card *card,
 148                              struct qeth_ipaddr *tmp_addr)
 149 {
 150         int rc = 0;
 151         struct qeth_ipaddr *addr;
 152
 153         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 154                 QETH_CARD_TEXT(card, 2, "delrxip");
 155         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 156                 QETH_CARD_TEXT(card, 2, "delvipa");
 157         else
 158                 QETH_CARD_TEXT(card, 2, "delip");
 159
 160         if (tmp_addr->proto == QETH_PROT_IPV4)
 161                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 162         else {
 163                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 164                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 165         }
 166
 167         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 168         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 169                 return -ENOENT;
 170
 171         addr->ref_counter--;
 172         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 173                 return rc;
 174         if (addr->in_progress)
 175                 return -EINPROGRESS;
 176
 177         if (qeth_card_hw_is_reachable(card))
 178                 rc = qeth_l3_deregister_addr_entry(card, addr);
 179
 180         hash_del(&addr->hnode);
 181         kfree(addr);
 182
 183         return rc;
 184 }
 185
 186 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 187 {
 188         int rc = 0;
 189         struct qeth_ipaddr *addr;
 190         char buf[40];
 191
 192         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 193                 QETH_CARD_TEXT(card, 2, "addrxip");
 194         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 195                 QETH_CARD_TEXT(card, 2, "addvipa");
 196         else
 197                 QETH_CARD_TEXT(card, 2, "addip");
 198
 199         if (tmp_addr->proto == QETH_PROT_IPV4)
 200                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 201         else {
 202                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 203                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 204         }
 205
 206         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 207         if (addr) {
 208                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 209                         return -EADDRINUSE;
 210                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 211                         addr->ref_counter++;
 212                         return 0;
 213                 }
 214                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 215                                          buf);
 216                 dev_warn(&card->gdev->dev,
 217                          "Registering IP address %s failed\n", buf);
 218                 return -EADDRINUSE;
 219         } else {
 220                 addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
 221                 if (!addr)
 222                         return -ENOMEM;
 223
 224                 memcpy(addr, tmp_addr, sizeof(struct qeth_ipaddr));
 225                 addr->ref_counter = 1;
 226
 227                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 228                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 229                         addr->ipato = 1;
 230                 }
 231                 hash_add(card->ip_htable, &addr->hnode,
 232                                 qeth_l3_ipaddr_hash(addr));
 233
 234                 if (!qeth_card_hw_is_reachable(card)) {
 235                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 236                         return 0;
 237                 }
 238
 239                 /* qeth_l3_register_addr_entry can go to sleep
 240                  * if we add a IPV4 addr. It is caused by the reason
 241                  * that SETIP ipa cmd starts ARP staff for IPV4 addr.
 242                  * Thus we should unlock spinlock, and make a protection
 243                  * using in_progress variable to indicate that there is
 244                  * an hardware operation with this IPV4 address
 245                  */
 246                 if (addr->proto == QETH_PROT_IPV4) {
 247                         addr->in_progress = 1;
 248                         mutex_unlock(&card->ip_lock);
 249                         rc = qeth_l3_register_addr_entry(card, addr);
 250                         mutex_lock(&card->ip_lock);
 251                         addr->in_progress = 0;
 252                 } else
 253                         rc = qeth_l3_register_addr_entry(card, addr);
 254
 255                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 256                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 257                         if (addr->ref_counter < 1) {
 258                                 qeth_l3_deregister_addr_entry(card, addr);
 259                                 hash_del(&addr->hnode);
 260                                 kfree(addr);
 261                         }
 262                 } else {
 263                         hash_del(&addr->hnode);
 264                         kfree(addr);
 265                 }
 266         }
 267         return rc;
 268 }
 269
 270 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 271                              bool add)
 272 {
 273         int rc;
 274
 275         mutex_lock(&card->ip_lock);
 276         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 277         mutex_unlock(&card->ip_lock);
 278
 279         return rc;
 280 }
 281
 282 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 283 {
 284         struct qeth_ipaddr *addr;
 285         struct hlist_node *tmp;
 286         int i;
 287
 288         hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
 289                 hash_del(&addr->hnode);
 290                 kfree(addr);
 291         }
 292 }
 293
 294 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 295 {
 296         struct qeth_ipaddr *addr;
 297         struct hlist_node *tmp;
 298         int i;
 299
 300         QETH_CARD_TEXT(card, 4, "clearip");
 301
 302         mutex_lock(&card->ip_lock);
 303
 304         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 305                 if (!recover) {
 306                         hash_del(&addr->hnode);
 307                         kfree(addr);
 308                         continue;
 309                 }
 310                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 311         }
 312
 313         mutex_unlock(&card->ip_lock);
 314 }
 315
 316 static void qeth_l3_recover_ip(struct qeth_card *card)
 317 {
 318         struct qeth_ipaddr *addr;
 319         struct hlist_node *tmp;
 320         int i;
 321         int rc;
 322
 323         QETH_CARD_TEXT(card, 4, "recovrip");
 324
 325         mutex_lock(&card->ip_lock);
 326
 327         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 328                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 329                         if (addr->proto == QETH_PROT_IPV4) {
 330                                 addr->in_progress = 1;
 331                                 mutex_unlock(&card->ip_lock);
 332                                 rc = qeth_l3_register_addr_entry(card, addr);
 333                                 mutex_lock(&card->ip_lock);
 334                                 addr->in_progress = 0;
 335                         } else
 336                                 rc = qeth_l3_register_addr_entry(card, addr);
 337
 338                         if (!rc) {
 339                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 340                                 if (addr->ref_counter < 1)
 341                                         qeth_l3_delete_ip(card, addr);
 342                         } else {
 343                                 hash_del(&addr->hnode);
 344                                 kfree(addr);
 345                         }
 346                 }
 347         }
 348
 349         mutex_unlock(&card->ip_lock);
 350 }
 351
 352 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 353                                unsigned long data)
 354 {
 355         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 356
 357         switch (cmd->hdr.return_code) {
 358         case IPA_RC_SUCCESS:
 359                 return 0;
 360         case IPA_RC_DUPLICATE_IP_ADDRESS:
 361                 return -EADDRINUSE;
 362         case IPA_RC_MC_ADDR_NOT_FOUND:
 363                 return -ENOENT;
 364         case IPA_RC_LAN_OFFLINE:
 365                 return -ENETDOWN;
 366         default:
 367                 return -EIO;
 368         }
 369 }
 370
 371 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 372                         struct qeth_ipaddr *addr, int ipacmd)
 373 {
 374         struct qeth_cmd_buffer *iob;
 375         struct qeth_ipa_cmd *cmd;
 376
 377         QETH_CARD_TEXT(card, 4, "setdelmc");
 378
 379         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 380                                  IPA_DATA_SIZEOF(setdelipm));
 381         if (!iob)
 382                 return -ENOMEM;
 383         cmd = __ipa_cmd(iob);
 384         if (addr->proto == QETH_PROT_IPV6) {
 385                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 386                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 387         } else {
 388                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 389                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 390         }
 391
 392         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 393 }
 394
 395 static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
 396 {
 397         int i, j;
 398         for (i = 0; i < 16; i++) {
 399                 j = (len) - (i * 8);
 400                 if (j >= 8)
 401                         netmask[i] = 0xff;
 402                 else if (j > 0)
 403                         netmask[i] = (u8)(0xFF00 >> j);
 404                 else
 405                         netmask[i] = 0;
 406         }
 407 }
 408
 409 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 410 {
 411         switch (addr->type) {
 412         case QETH_IP_TYPE_RXIP:
 413                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 414         case QETH_IP_TYPE_VIPA:
 415                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 416                                QETH_IPA_DELIP_VIPA_FLAG;
 417         default:
 418                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 419         }
 420 }
 421
 422 static int qeth_l3_send_setdelip(struct qeth_card *card,
 423                                  struct qeth_ipaddr *addr,
 424                                  enum qeth_ipa_cmds ipacmd)
 425 {
 426         struct qeth_cmd_buffer *iob;
 427         struct qeth_ipa_cmd *cmd;
 428         __u8 netmask[16];
 429         u32 flags;
 430
 431         QETH_CARD_TEXT(card, 4, "setdelip");
 432
 433         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 434                                  IPA_DATA_SIZEOF(setdelip6));
 435         if (!iob)
 436                 return -ENOMEM;
 437         cmd = __ipa_cmd(iob);
 438
 439         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 440         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 441
 442         if (addr->proto == QETH_PROT_IPV6) {
 443                 memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
 444                        sizeof(struct in6_addr));
 445                 qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
 446                 memcpy(cmd->data.setdelip6.mask, netmask,
 447                        sizeof(struct in6_addr));
 448                 cmd->data.setdelip6.flags = flags;
 449         } else {
 450                 memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
 451                 memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
 452                 cmd->data.setdelip4.flags = flags;
 453         }
 454
 455         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 456 }
 457
 458 static int qeth_l3_send_setrouting(struct qeth_card *card,
 459         enum qeth_routing_types type, enum qeth_prot_versions prot)
 460 {
 461         int rc;
 462         struct qeth_ipa_cmd *cmd;
 463         struct qeth_cmd_buffer *iob;
 464
 465         QETH_CARD_TEXT(card, 4, "setroutg");
 466         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 467                                  IPA_DATA_SIZEOF(setrtg));
 468         if (!iob)
 469                 return -ENOMEM;
 470         cmd = __ipa_cmd(iob);
 471         cmd->data.setrtg.type = (type);
 472         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 473
 474         return rc;
 475 }
 476
 477 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 478                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 479 {
 480         if (IS_IQD(card)) {
 481                 switch (*type) {
 482                 case NO_ROUTER:
 483                 case PRIMARY_CONNECTOR:
 484                 case SECONDARY_CONNECTOR:
 485                 case MULTICAST_ROUTER:
 486                         return 0;
 487                 default:
 488                         goto out_inval;
 489                 }
 490         } else {
 491                 switch (*type) {
 492                 case NO_ROUTER:
 493                 case PRIMARY_ROUTER:
 494                 case SECONDARY_ROUTER:
 495                         return 0;
 496                 case MULTICAST_ROUTER:
 497                         if (qeth_is_ipafunc_supported(card, prot,
 498                                                       IPA_OSA_MC_ROUTER))
 499                                 return 0;
 500                 default:
 501                         goto out_inval;
 502                 }
 503         }
 504 out_inval:
 505         *type = NO_ROUTER;
 506         return -EINVAL;
 507 }
 508
 509 int qeth_l3_setrouting_v4(struct qeth_card *card)
 510 {
 511         int rc;
 512
 513         QETH_CARD_TEXT(card, 3, "setrtg4");
 514
 515         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 516                                   QETH_PROT_IPV4);
 517         if (rc)
 518                 return rc;
 519
 520         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 521                                   QETH_PROT_IPV4);
 522         if (rc) {
 523                 card->options.route4.type = NO_ROUTER;
 524                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 525                                  rc, CARD_DEVID(card));
 526         }
 527         return rc;
 528 }
 529
 530 int qeth_l3_setrouting_v6(struct qeth_card *card)
 531 {
 532         int rc = 0;
 533
 534         QETH_CARD_TEXT(card, 3, "setrtg6");
 535
 536         if (!qeth_is_supported(card, IPA_IPV6))
 537                 return 0;
 538         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 539                                   QETH_PROT_IPV6);
 540         if (rc)
 541                 return rc;
 542
 543         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 544                                   QETH_PROT_IPV6);
 545         if (rc) {
 546                 card->options.route6.type = NO_ROUTER;
 547                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 548                                  rc, CARD_DEVID(card));
 549         }
 550         return rc;
 551 }
 552
 553 /*
 554  * IP address takeover related functions
 555  */
 556
 557 /**
 558  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 559  *
 560  * Caller must hold ip_lock.
 561  */
 562 void qeth_l3_update_ipato(struct qeth_card *card)
 563 {
 564         struct qeth_ipaddr *addr;
 565         unsigned int i;
 566
 567         hash_for_each(card->ip_htable, i, addr, hnode) {
 568                 if (addr->type != QETH_IP_TYPE_NORMAL)
 569                         continue;
 570                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 571         }
 572 }
 573
 574 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 575 {
 576         struct qeth_ipato_entry *ipatoe, *tmp;
 577
 578         mutex_lock(&card->ip_lock);
 579
 580         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 581                 list_del(&ipatoe->entry);
 582                 kfree(ipatoe);
 583         }
 584
 585         qeth_l3_update_ipato(card);
 586         mutex_unlock(&card->ip_lock);
 587 }
 588
 589 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 590                                 struct qeth_ipato_entry *new)
 591 {
 592         struct qeth_ipato_entry *ipatoe;
 593         int rc = 0;
 594
 595         QETH_CARD_TEXT(card, 2, "addipato");
 596
 597         mutex_lock(&card->ip_lock);
 598
 599         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 600                 if (ipatoe->proto != new->proto)
 601                         continue;
 602                 if (!memcmp(ipatoe->addr, new->addr,
 603                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 604                     (ipatoe->mask_bits == new->mask_bits)) {
 605                         rc = -EEXIST;
 606                         break;
 607                 }
 608         }
 609
 610         if (!rc) {
 611                 list_add_tail(&new->entry, &card->ipato.entries);
 612                 qeth_l3_update_ipato(card);
 613         }
 614
 615         mutex_unlock(&card->ip_lock);
 616
 617         return rc;
 618 }
 619
 620 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 621                             enum qeth_prot_versions proto, u8 *addr,
 622                             int mask_bits)
 623 {
 624         struct qeth_ipato_entry *ipatoe, *tmp;
 625         int rc = -ENOENT;
 626
 627         QETH_CARD_TEXT(card, 2, "delipato");
 628
 629         mutex_lock(&card->ip_lock);
 630
 631         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 632                 if (ipatoe->proto != proto)
 633                         continue;
 634                 if (!memcmp(ipatoe->addr, addr,
 635                             (proto == QETH_PROT_IPV4)? 4:16) &&
 636                     (ipatoe->mask_bits == mask_bits)) {
 637                         list_del(&ipatoe->entry);
 638                         qeth_l3_update_ipato(card);
 639                         kfree(ipatoe);
 640                         rc = 0;
 641                 }
 642         }
 643
 644         mutex_unlock(&card->ip_lock);
 645         return rc;
 646 }
 647
 648 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 649                              enum qeth_ip_types type,
 650                              enum qeth_prot_versions proto)
 651 {
 652         struct qeth_ipaddr addr;
 653
 654         qeth_l3_init_ipaddr(&addr, type, proto);
 655         if (proto == QETH_PROT_IPV4)
 656                 memcpy(&addr.u.a4.addr, ip, 4);
 657         else
 658                 memcpy(&addr.u.a6.addr, ip, 16);
 659
 660         return qeth_l3_modify_ip(card, &addr, add);
 661 }
 662
 663 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 664 {
 665         struct qeth_ipaddr addr;
 666         unsigned int i;
 667
 668         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 669         addr.u.a6.addr.s6_addr[0] = 0xfe;
 670         addr.u.a6.addr.s6_addr[1] = 0x80;
 671         for (i = 0; i < 8; i++)
 672                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 673
 674         return qeth_l3_modify_ip(card, &addr, add);
 675 }
 676
 677 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 678                                 struct qeth_ipaddr *addr)
 679 {
 680         char buf[50];
 681         int rc = 0;
 682         int cnt = 3;
 683
 684         if (card->options.sniffer)
 685                 return 0;
 686
 687         if (addr->proto == QETH_PROT_IPV4) {
 688                 QETH_CARD_TEXT(card, 2, "setaddr4");
 689                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 690         } else if (addr->proto == QETH_PROT_IPV6) {
 691                 QETH_CARD_TEXT(card, 2, "setaddr6");
 692                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 693                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 694         } else {
 695                 QETH_CARD_TEXT(card, 2, "setaddr?");
 696                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 697         }
 698         do {
 699                 if (addr->is_multicast)
 700                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 701                 else
 702                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 703                 if (rc)
 704                         QETH_CARD_TEXT(card, 2, "failed");
 705         } while ((--cnt > 0) && rc);
 706         if (rc) {
 707                 QETH_CARD_TEXT(card, 2, "FAILED");
 708                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 709                 dev_warn(&card->gdev->dev,
 710                         "Registering IP address %s failed\n", buf);
 711         }
 712         return rc;
 713 }
 714
 715 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 716                                                 struct qeth_ipaddr *addr)
 717 {
 718         int rc = 0;
 719
 720         if (card->options.sniffer)
 721                 return 0;
 722
 723         if (addr->proto == QETH_PROT_IPV4) {
 724                 QETH_CARD_TEXT(card, 2, "deladdr4");
 725                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 726         } else if (addr->proto == QETH_PROT_IPV6) {
 727                 QETH_CARD_TEXT(card, 2, "deladdr6");
 728                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 729                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 730         } else {
 731                 QETH_CARD_TEXT(card, 2, "deladdr?");
 732                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 733         }
 734         if (addr->is_multicast)
 735                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 736         else
 737                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 738         if (rc)
 739                 QETH_CARD_TEXT(card, 2, "failed");
 740
 741         return rc;
 742 }
 743
 744 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 745 {
 746         int rc = 0;
 747
 748         QETH_CARD_TEXT(card, 2, "setadprm");
 749
 750         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 751                 rc = qeth_setadpparms_change_macaddr(card);
 752                 if (rc)
 753                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 754                                 " address failed\n");
 755         }
 756
 757         return rc;
 758 }
 759
 760 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 761 {
 762         int rc;
 763
 764         QETH_CARD_TEXT(card, 3, "ipaarp");
 765
 766         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 767                 dev_info(&card->gdev->dev,
 768                         "ARP processing not supported on %s!\n",
 769                         QETH_CARD_IFNAME(card));
 770                 return 0;
 771         }
 772         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 773                                           IPA_CMD_ASS_START, NULL);
 774         if (rc) {
 775                 dev_warn(&card->gdev->dev,
 776                         "Starting ARP processing support for %s failed\n",
 777                         QETH_CARD_IFNAME(card));
 778         }
 779         return rc;
 780 }
 781
 782 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 783 {
 784         int rc;
 785
 786         QETH_CARD_TEXT(card, 3, "stsrcmac");
 787
 788         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 789                 dev_info(&card->gdev->dev,
 790                         "Inbound source MAC-address not supported on %s\n",
 791                         QETH_CARD_IFNAME(card));
 792                 return -EOPNOTSUPP;
 793         }
 794
 795         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 796                                           IPA_CMD_ASS_START, NULL);
 797         if (rc)
 798                 dev_warn(&card->gdev->dev,
 799                         "Starting source MAC-address support for %s failed\n",
 800                         QETH_CARD_IFNAME(card));
 801         return rc;
 802 }
 803
 804 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 805 {
 806         int rc = 0;
 807
 808         QETH_CARD_TEXT(card, 3, "strtvlan");
 809
 810         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 811                 dev_info(&card->gdev->dev,
 812                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 813                 return -EOPNOTSUPP;
 814         }
 815
 816         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 817                                           IPA_CMD_ASS_START, NULL);
 818         if (rc) {
 819                 dev_warn(&card->gdev->dev,
 820                         "Starting VLAN support for %s failed\n",
 821                         QETH_CARD_IFNAME(card));
 822         } else {
 823                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 824         }
 825         return rc;
 826 }
 827
 828 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 829 {
 830         int rc;
 831
 832         QETH_CARD_TEXT(card, 3, "stmcast");
 833
 834         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 835                 dev_info(&card->gdev->dev,
 836                         "Multicast not supported on %s\n",
 837                         QETH_CARD_IFNAME(card));
 838                 return -EOPNOTSUPP;
 839         }
 840
 841         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 842                                           IPA_CMD_ASS_START, NULL);
 843         if (rc) {
 844                 dev_warn(&card->gdev->dev,
 845                         "Starting multicast support for %s failed\n",
 846                         QETH_CARD_IFNAME(card));
 847         } else {
 848                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 849                 card->dev->flags |= IFF_MULTICAST;
 850         }
 851         return rc;
 852 }
 853
 854 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 855 {
 856         u32 ipv6_data = 3;
 857         int rc;
 858
 859         QETH_CARD_TEXT(card, 3, "softipv6");
 860
 861         if (IS_IQD(card))
 862                 goto out;
 863
 864         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 865                                           &ipv6_data);
 866         if (rc) {
 867                 dev_err(&card->gdev->dev,
 868                         "Activating IPv6 support for %s failed\n",
 869                         QETH_CARD_IFNAME(card));
 870                 return rc;
 871         }
 872         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 873                                              NULL);
 874         if (rc) {
 875                 dev_err(&card->gdev->dev,
 876                         "Activating IPv6 support for %s failed\n",
 877                          QETH_CARD_IFNAME(card));
 878                 return rc;
 879         }
 880         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 881                                              IPA_CMD_ASS_START, NULL);
 882         if (rc) {
 883                 dev_warn(&card->gdev->dev,
 884                         "Enabling the passthrough mode for %s failed\n",
 885                         QETH_CARD_IFNAME(card));
 886                 return rc;
 887         }
 888 out:
 889         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 890         return 0;
 891 }
 892
 893 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 894 {
 895         QETH_CARD_TEXT(card, 3, "strtipv6");
 896
 897         if (!qeth_is_supported(card, IPA_IPV6)) {
 898                 dev_info(&card->gdev->dev,
 899                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 900                 return 0;
 901         }
 902         return qeth_l3_softsetup_ipv6(card);
 903 }
 904
 905 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 906 {
 907         u32 filter_data = 1;
 908         int rc;
 909
 910         QETH_CARD_TEXT(card, 3, "stbrdcst");
 911         card->info.broadcast_capable = 0;
 912         if (!qeth_is_supported(card, IPA_FILTERING)) {
 913                 dev_info(&card->gdev->dev,
 914                         "Broadcast not supported on %s\n",
 915                         QETH_CARD_IFNAME(card));
 916                 rc = -EOPNOTSUPP;
 917                 goto out;
 918         }
 919         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 920                                           IPA_CMD_ASS_START, NULL);
 921         if (rc) {
 922                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 923                         "%s failed\n", QETH_CARD_IFNAME(card));
 924                 goto out;
 925         }
 926
 927         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 928                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 929         if (rc) {
 930                 dev_warn(&card->gdev->dev,
 931                         "Setting up broadcast filtering for %s failed\n",
 932                         QETH_CARD_IFNAME(card));
 933                 goto out;
 934         }
 935         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 936         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 937         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 938                                           IPA_CMD_ASS_ENABLE, &filter_data);
 939         if (rc) {
 940                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 941                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 942                 goto out;
 943         }
 944         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 945 out:
 946         if (card->info.broadcast_capable)
 947                 card->dev->flags |= IFF_BROADCAST;
 948         else
 949                 card->dev->flags &= ~IFF_BROADCAST;
 950         return rc;
 951 }
 952
 953 static int qeth_l3_start_ipassists(struct qeth_card *card)
 954 {
 955         QETH_CARD_TEXT(card, 3, "strtipas");
 956
 957         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 958         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 959         qeth_l3_start_ipa_vlan(card);           /* go on*/
 960         qeth_l3_start_ipa_multicast(card);              /* go on*/
 961         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 962         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 963         return 0;
 964 }
 965
 966 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 967                 struct qeth_reply *reply, unsigned long data)
 968 {
 969         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 970
 971         if (cmd->hdr.return_code)
 972                 return -EIO;
 973
 974         ether_addr_copy(card->dev->dev_addr,
 975                         cmd->data.create_destroy_addr.unique_id);
 976         return 0;
 977 }
 978
 979 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 980 {
 981         int rc = 0;
 982         struct qeth_cmd_buffer *iob;
 983         struct qeth_ipa_cmd *cmd;
 984
 985         QETH_CARD_TEXT(card, 2, "hsrmac");
 986
 987         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 988                                  IPA_DATA_SIZEOF(create_destroy_addr));
 989         if (!iob)
 990                 return -ENOMEM;
 991         cmd = __ipa_cmd(iob);
 992         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
 993                         card->info.unique_id;
 994
 995         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 996                                 NULL);
 997         return rc;
 998 }
 999
1000 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
1001                 struct qeth_reply *reply, unsigned long data)
1002 {
1003         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1004
1005         if (cmd->hdr.return_code == 0) {
1006                 card->info.unique_id = *((__u16 *)
1007                                 &cmd->data.create_destroy_addr.unique_id[6]);
1008                 return 0;
1009         }
1010
1011         card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1012                                UNIQUE_ID_NOT_BY_CARD;
1013         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
1014         return -EIO;
1015 }
1016
1017 static int qeth_l3_get_unique_id(struct qeth_card *card)
1018 {
1019         int rc = 0;
1020         struct qeth_cmd_buffer *iob;
1021         struct qeth_ipa_cmd *cmd;
1022
1023         QETH_CARD_TEXT(card, 2, "guniqeid");
1024
1025         if (!qeth_is_supported(card, IPA_IPV6)) {
1026                 card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1027                                         UNIQUE_ID_NOT_BY_CARD;
1028                 return 0;
1029         }
1030
1031         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
1032                                  IPA_DATA_SIZEOF(create_destroy_addr));
1033         if (!iob)
1034                 return -ENOMEM;
1035         cmd = __ipa_cmd(iob);
1036         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
1037                         card->info.unique_id;
1038
1039         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
1040         return rc;
1041 }
1042
1043 static int
1044 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
1045                             unsigned long data)
1046 {
1047         struct qeth_ipa_cmd        *cmd;
1048         __u16 rc;
1049
1050         QETH_CARD_TEXT(card, 2, "diastrcb");
1051
1052         cmd = (struct qeth_ipa_cmd *)data;
1053         rc = cmd->hdr.return_code;
1054         if (rc)
1055                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
1056         switch (cmd->data.diagass.action) {
1057         case QETH_DIAGS_CMD_TRACE_QUERY:
1058                 break;
1059         case QETH_DIAGS_CMD_TRACE_DISABLE:
1060                 switch (rc) {
1061                 case 0:
1062                 case IPA_RC_INVALID_SUBCMD:
1063                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1064                         dev_info(&card->gdev->dev, "The HiperSockets network "
1065                                 "traffic analyzer is deactivated\n");
1066                         break;
1067                 default:
1068                         break;
1069                 }
1070                 break;
1071         case QETH_DIAGS_CMD_TRACE_ENABLE:
1072                 switch (rc) {
1073                 case 0:
1074                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1075                         dev_info(&card->gdev->dev, "The HiperSockets network "
1076                                 "traffic analyzer is activated\n");
1077                         break;
1078                 case IPA_RC_HARDWARE_AUTH_ERROR:
1079                         dev_warn(&card->gdev->dev, "The device is not "
1080                                 "authorized to run as a HiperSockets network "
1081                                 "traffic analyzer\n");
1082                         break;
1083                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1084                         dev_warn(&card->gdev->dev, "A HiperSockets "
1085                                 "network traffic analyzer is already "
1086                                 "active in the HiperSockets LAN\n");
1087                         break;
1088                 default:
1089                         break;
1090                 }
1091                 break;
1092         default:
1093                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1094                                  cmd->data.diagass.action, CARD_DEVID(card));
1095         }
1096
1097         return rc ? -EIO : 0;
1098 }
1099
1100 static int
1101 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1102 {
1103         struct qeth_cmd_buffer *iob;
1104         struct qeth_ipa_cmd    *cmd;
1105
1106         QETH_CARD_TEXT(card, 2, "diagtrac");
1107
1108         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1109         if (!iob)
1110                 return -ENOMEM;
1111         cmd = __ipa_cmd(iob);
1112         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1113         cmd->data.diagass.action = diags_cmd;
1114         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1115 }
1116
1117 static void
1118 qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
1119 {
1120         struct ip_mc_list *im4;
1121         struct qeth_ipaddr *tmp, *ipm;
1122
1123         QETH_CARD_TEXT(card, 4, "addmc");
1124
1125         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1126         if (!tmp)
1127                 return;
1128
1129         for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1130              im4 = rcu_dereference(im4->next_rcu)) {
1131                 tmp->u.a4.addr = im4->multiaddr;
1132                 tmp->is_multicast = 1;
1133
1134                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1135                 if (ipm) {
1136                         /* for mcast, by-IP match means full match */
1137                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1138                 } else {
1139                         ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1140                         if (!ipm)
1141                                 continue;
1142
1143                         ipm->u.a4.addr = im4->multiaddr;
1144                         ipm->is_multicast = 1;
1145                         ipm->disp_flag = QETH_DISP_ADDR_ADD;
1146                         hash_add(card->ip_mc_htable,
1147                                         &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1148                 }
1149         }
1150
1151         kfree(tmp);
1152 }
1153
1154 /* called with rcu_read_lock */
1155 static void qeth_l3_add_vlan_mc(struct qeth_card *card)
1156 {
1157         struct in_device *in_dev;
1158         u16 vid;
1159
1160         QETH_CARD_TEXT(card, 4, "addmcvl");
1161
1162         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1163                 return;
1164
1165         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1166                 struct net_device *netdev;
1167
1168                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1169                                               vid);
1170                 if (netdev == NULL ||
1171                     !(netdev->flags & IFF_UP))
1172                         continue;
1173                 in_dev = __in_dev_get_rcu(netdev);
1174                 if (!in_dev)
1175                         continue;
1176                 qeth_l3_add_mc_to_hash(card, in_dev);
1177         }
1178 }
1179
1180 static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
1181 {
1182         struct in_device *in4_dev;
1183
1184         QETH_CARD_TEXT(card, 4, "chkmcv4");
1185
1186         rcu_read_lock();
1187         in4_dev = __in_dev_get_rcu(card->dev);
1188         if (in4_dev == NULL)
1189                 goto unlock;
1190         qeth_l3_add_mc_to_hash(card, in4_dev);
1191         qeth_l3_add_vlan_mc(card);
1192 unlock:
1193         rcu_read_unlock();
1194 }
1195
1196 static void qeth_l3_add_mc6_to_hash(struct qeth_card *card,
1197                                     struct inet6_dev *in6_dev)
1198 {
1199         struct qeth_ipaddr *ipm;
1200         struct ifmcaddr6 *im6;
1201         struct qeth_ipaddr *tmp;
1202
1203         QETH_CARD_TEXT(card, 4, "addmc6");
1204
1205         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1206         if (!tmp)
1207                 return;
1208
1209         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1210                 tmp->u.a6.addr = im6->mca_addr;
1211                 tmp->is_multicast = 1;
1212
1213                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1214                 if (ipm) {
1215                         /* for mcast, by-IP match means full match */
1216                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1217                         continue;
1218                 }
1219
1220                 ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1221                 if (!ipm)
1222                         continue;
1223
1224                 ipm->u.a6.addr = im6->mca_addr;
1225                 ipm->is_multicast = 1;
1226                 ipm->disp_flag = QETH_DISP_ADDR_ADD;
1227                 hash_add(card->ip_mc_htable,
1228                                 &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1229
1230         }
1231         kfree(tmp);
1232 }
1233
1234 /* called with rcu_read_lock */
1235 static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
1236 {
1237         struct inet6_dev *in_dev;
1238         u16 vid;
1239
1240         QETH_CARD_TEXT(card, 4, "admc6vl");
1241
1242         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1243                 return;
1244
1245         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1246                 struct net_device *netdev;
1247
1248                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1249                                               vid);
1250                 if (netdev == NULL ||
1251                     !(netdev->flags & IFF_UP))
1252                         continue;
1253                 in_dev = in6_dev_get(netdev);
1254                 if (!in_dev)
1255                         continue;
1256                 read_lock_bh(&in_dev->lock);
1257                 qeth_l3_add_mc6_to_hash(card, in_dev);
1258                 read_unlock_bh(&in_dev->lock);
1259                 in6_dev_put(in_dev);
1260         }
1261 }
1262
1263 static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
1264 {
1265         struct inet6_dev *in6_dev;
1266
1267         QETH_CARD_TEXT(card, 4, "chkmcv6");
1268
1269         if (!qeth_is_supported(card, IPA_IPV6))
1270                 return ;
1271         in6_dev = in6_dev_get(card->dev);
1272         if (!in6_dev)
1273                 return;
1274
1275         rcu_read_lock();
1276         read_lock_bh(&in6_dev->lock);
1277         qeth_l3_add_mc6_to_hash(card, in6_dev);
1278         qeth_l3_add_vlan_mc6(card);
1279         read_unlock_bh(&in6_dev->lock);
1280         rcu_read_unlock();
1281         in6_dev_put(in6_dev);
1282 }
1283
1284 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1285                                    __be16 proto, u16 vid)
1286 {
1287         struct qeth_card *card = dev->ml_priv;
1288
1289         set_bit(vid, card->active_vlans);
1290         return 0;
1291 }
1292
1293 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1294                                     __be16 proto, u16 vid)
1295 {
1296         struct qeth_card *card = dev->ml_priv;
1297
1298         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1299
1300         clear_bit(vid, card->active_vlans);
1301         qeth_l3_set_rx_mode(dev);
1302         return 0;
1303 }
1304
1305 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
1306                                 struct qeth_hdr *hdr)
1307 {
1308         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
1309         struct net_device *dev = skb->dev;
1310
1311         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
1312                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
1313                                 "FAKELL", skb->len);
1314                 return;
1315         }
1316
1317         if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
1318                 u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
1319                                                                  ETH_P_IP;
1320                 unsigned char tg_addr[ETH_ALEN];
1321
1322                 skb_reset_network_header(skb);
1323                 switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
1324                 case QETH_CAST_MULTICAST:
1325                         if (prot == ETH_P_IP)
1326                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
1327                         else
1328                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
1329                         QETH_CARD_STAT_INC(card, rx_multicast);
1330                         break;
1331                 case QETH_CAST_BROADCAST:
1332                         ether_addr_copy(tg_addr, card->dev->broadcast);
1333                         QETH_CARD_STAT_INC(card, rx_multicast);
1334                         break;
1335                 default:
1336                         if (card->options.sniffer)
1337                                 skb->pkt_type = PACKET_OTHERHOST;
1338                         ether_addr_copy(tg_addr, card->dev->dev_addr);
1339                 }
1340
1341                 if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
1342                         card->dev->header_ops->create(skb, card->dev, prot,
1343                                 tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
1344                                 skb->len);
1345                 else
1346                         card->dev->header_ops->create(skb, card->dev, prot,
1347                                 tg_addr, "FAKELL", skb->len);
1348         }
1349
1350         /* copy VLAN tag from hdr into skb */
1351         if (!card->options.sniffer &&
1352             (hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
1353                                       QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
1354                 u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
1355                                 hdr->hdr.l3.vlan_id :
1356                                 hdr->hdr.l3.next_hop.rx.vlan_id;
1357                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
1358         }
1359
1360         qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
1361 }
1362
1363 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
1364                                 int budget, int *done)
1365 {
1366         int work_done = 0;
1367         struct sk_buff *skb;
1368         struct qeth_hdr *hdr;
1369         unsigned int len;
1370
1371         *done = 0;
1372         WARN_ON_ONCE(!budget);
1373         while (budget) {
1374                 skb = qeth_core_get_next_skb(card,
1375                         &card->qdio.in_q->bufs[card->rx.b_index],
1376                         &card->rx.b_element, &card->rx.e_offset, &hdr);
1377                 if (!skb) {
1378                         *done = 1;
1379                         break;
1380                 }
1381                 switch (hdr->hdr.l3.id) {
1382                 case QETH_HEADER_TYPE_LAYER3:
1383                         qeth_l3_rebuild_skb(card, skb, hdr);
1384                         /* fall through */
1385                 case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
1386                         skb->protocol = eth_type_trans(skb, skb->dev);
1387                         len = skb->len;
1388                         napi_gro_receive(&card->napi, skb);
1389                         break;
1390                 default:
1391                         dev_kfree_skb_any(skb);
1392                         QETH_CARD_TEXT(card, 3, "inbunkno");
1393                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
1394                         continue;
1395                 }
1396                 work_done++;
1397                 budget--;
1398                 QETH_CARD_STAT_INC(card, rx_packets);
1399                 QETH_CARD_STAT_ADD(card, rx_bytes, len);
1400         }
1401         return work_done;
1402 }
1403
1404 static void qeth_l3_stop_card(struct qeth_card *card)
1405 {
1406         QETH_CARD_TEXT(card, 2, "stopcard");
1407
1408         qeth_set_allowed_threads(card, 0, 1);
1409
1410         cancel_work_sync(&card->rx_mode_work);
1411         qeth_l3_drain_rx_mode_cache(card);
1412
1413         if (card->options.sniffer &&
1414             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1415                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1416
1417         if (card->state == CARD_STATE_SOFTSETUP) {
1418                 qeth_l3_clear_ip_htable(card, 1);
1419                 qeth_clear_ipacmd_list(card);
1420                 card->state = CARD_STATE_HARDSETUP;
1421         }
1422         if (card->state == CARD_STATE_HARDSETUP) {
1423                 qeth_qdio_clear_card(card, 0);
1424                 qeth_drain_output_queues(card);
1425                 qeth_clear_working_pool_list(card);
1426                 card->state = CARD_STATE_DOWN;
1427         }
1428
1429         flush_workqueue(card->event_wq);
1430 }
1431
1432 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1433 {
1434         bool enable = card->dev->flags & IFF_PROMISC;
1435
1436         if (card->info.promisc_mode == enable)
1437                 return;
1438
1439         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1440                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1441                         qeth_setadp_promisc_mode(card, enable);
1442         } else if (card->options.sniffer &&     /* HiperSockets trace */
1443                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1444                 if (enable) {
1445                         QETH_CARD_TEXT(card, 3, "+promisc");
1446                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1447                 } else {
1448                         QETH_CARD_TEXT(card, 3, "-promisc");
1449                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1450                 }
1451         }
1452 }
1453
1454 static void qeth_l3_rx_mode_work(struct work_struct *work)
1455 {
1456         struct qeth_card *card = container_of(work, struct qeth_card,
1457                                               rx_mode_work);
1458         struct qeth_ipaddr *addr;
1459         struct hlist_node *tmp;
1460         int i, rc;
1461
1462         QETH_CARD_TEXT(card, 3, "setmulti");
1463
1464         if (!card->options.sniffer) {
1465                 qeth_l3_add_multicast_ipv4(card);
1466                 qeth_l3_add_multicast_ipv6(card);
1467
1468                 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1469                         switch (addr->disp_flag) {
1470                         case QETH_DISP_ADDR_DELETE:
1471                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1472                                 if (!rc || rc == -ENOENT) {
1473                                         hash_del(&addr->hnode);
1474                                         kfree(addr);
1475                                 }
1476                                 break;
1477                         case QETH_DISP_ADDR_ADD:
1478                                 rc = qeth_l3_register_addr_entry(card, addr);
1479                                 if (rc && rc != -ENETDOWN) {
1480                                         hash_del(&addr->hnode);
1481                                         kfree(addr);
1482                                         break;
1483                                 }
1484                                 addr->ref_counter = 1;
1485                                 /* fall through */
1486                         default:
1487                                 /* for next call to set_rx_mode(): */
1488                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1489                         }
1490                 }
1491         }
1492
1493         qeth_l3_set_promisc_mode(card);
1494 }
1495
1496 static int qeth_l3_arp_makerc(u16 rc)
1497 {
1498         switch (rc) {
1499         case IPA_RC_SUCCESS:
1500                 return 0;
1501         case QETH_IPA_ARP_RC_NOTSUPP:
1502         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1503                 return -EOPNOTSUPP;
1504         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1505                 return -EINVAL;
1506         case QETH_IPA_ARP_RC_Q_NO_DATA:
1507                 return -ENOENT;
1508         default:
1509                 return -EIO;
1510         }
1511 }
1512
1513 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1514                               unsigned long data)
1515 {
1516         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1517
1518         qeth_setassparms_cb(card, reply, data);
1519         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1520 }
1521
1522 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1523 {
1524         struct qeth_cmd_buffer *iob;
1525         int rc;
1526
1527         QETH_CARD_TEXT(card, 3, "arpstnoe");
1528
1529         /*
1530          * currently GuestLAN only supports the ARP assist function
1531          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1532          * thus we say EOPNOTSUPP for this ARP function
1533          */
1534         if (IS_VM_NIC(card))
1535                 return -EOPNOTSUPP;
1536         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1537                 return -EOPNOTSUPP;
1538         }
1539
1540         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1541                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1542                                        SETASS_DATA_SIZEOF(flags_32bit),
1543                                        QETH_PROT_IPV4);
1544         if (!iob)
1545                 return -ENOMEM;
1546
1547         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1548         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1549         if (rc)
1550                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1551                                  CARD_DEVID(card), rc);
1552         return rc;
1553 }
1554
1555 static __u32 get_arp_entry_size(struct qeth_card *card,
1556                         struct qeth_arp_query_data *qdata,
1557                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1558 {
1559         __u32 rc;
1560         __u8 is_hsi;
1561
1562         is_hsi = qdata->reply_bits == 5;
1563         if (type->ip == QETHARP_IP_ADDR_V4) {
1564                 QETH_CARD_TEXT(card, 4, "arpev4");
1565                 if (strip_entries) {
1566                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1567                                 sizeof(struct qeth_arp_qi_entry7_short);
1568                 } else {
1569                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1570                                 sizeof(struct qeth_arp_qi_entry7);
1571                 }
1572         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1573                 QETH_CARD_TEXT(card, 4, "arpev6");
1574                 if (strip_entries) {
1575                         rc = is_hsi ?
1576                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1577                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1578                 } else {
1579                         rc = is_hsi ?
1580                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1581                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1582                 }
1583         } else {
1584                 QETH_CARD_TEXT(card, 4, "arpinv");
1585                 rc = 0;
1586         }
1587
1588         return rc;
1589 }
1590
1591 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1592 {
1593         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1594                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1595 }
1596
1597 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1598                 struct qeth_reply *reply, unsigned long data)
1599 {
1600         struct qeth_ipa_cmd *cmd;
1601         struct qeth_arp_query_data *qdata;
1602         struct qeth_arp_query_info *qinfo;
1603         int e;
1604         int entrybytes_done;
1605         int stripped_bytes;
1606         __u8 do_strip_entries;
1607
1608         QETH_CARD_TEXT(card, 3, "arpquecb");
1609
1610         qinfo = (struct qeth_arp_query_info *) reply->param;
1611         cmd = (struct qeth_ipa_cmd *) data;
1612         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1613         if (cmd->hdr.return_code) {
1614                 QETH_CARD_TEXT(card, 4, "arpcberr");
1615                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1616                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1617         }
1618         if (cmd->data.setassparms.hdr.return_code) {
1619                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1620                 QETH_CARD_TEXT(card, 4, "setaperr");
1621                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1622                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1623         }
1624         qdata = &cmd->data.setassparms.data.query_arp;
1625         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1626
1627         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1628         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1629         entrybytes_done = 0;
1630         for (e = 0; e < qdata->no_entries; ++e) {
1631                 char *cur_entry;
1632                 __u32 esize;
1633                 struct qeth_arp_entrytype *etype;
1634
1635                 cur_entry = &qdata->data + entrybytes_done;
1636                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1637                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1638                         QETH_CARD_TEXT(card, 4, "pmis");
1639                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1640                         break;
1641                 }
1642                 esize = get_arp_entry_size(card, qdata, etype,
1643                         do_strip_entries);
1644                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1645                 if (!esize)
1646                         break;
1647
1648                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1649                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1650                         memset(qinfo->udata, 0, 4);
1651                         return -ENOSPC;
1652                 }
1653
1654                 memcpy(qinfo->udata + qinfo->udata_offset,
1655                         &qdata->data + entrybytes_done + stripped_bytes,
1656                         esize);
1657                 entrybytes_done += esize + stripped_bytes;
1658                 qinfo->udata_offset += esize;
1659                 ++qinfo->no_entries;
1660         }
1661         /* check if all replies received ... */
1662         if (cmd->data.setassparms.hdr.seq_no <
1663             cmd->data.setassparms.hdr.number_of_replies)
1664                 return 1;
1665         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1666         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1667         /* keep STRIP_ENTRIES flag so the user program can distinguish
1668          * stripped entries from normal ones */
1669         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1670                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1671         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1672         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1673         return 0;
1674 }
1675
1676 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1677         enum qeth_prot_versions prot,
1678         struct qeth_arp_query_info *qinfo)
1679 {
1680         struct qeth_cmd_buffer *iob;
1681         struct qeth_ipa_cmd *cmd;
1682         int rc;
1683
1684         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1685
1686         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1687                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1688                                        SETASS_DATA_SIZEOF(query_arp), prot);
1689         if (!iob)
1690                 return -ENOMEM;
1691         cmd = __ipa_cmd(iob);
1692         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1693         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1694         if (rc)
1695                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1696                                  CARD_DEVID(card), rc);
1697         return rc;
1698 }
1699
1700 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1701 {
1702         struct qeth_arp_query_info qinfo = {0, };
1703         int rc;
1704
1705         QETH_CARD_TEXT(card, 3, "arpquery");
1706
1707         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1708                                IPA_ARP_PROCESSING)) {
1709                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1710                 rc = -EOPNOTSUPP;
1711                 goto out;
1712         }
1713         /* get size of userspace buffer and mask_bits -> 6 bytes */
1714         if (copy_from_user(&qinfo, udata, 6)) {
1715                 rc = -EFAULT;
1716                 goto out;
1717         }
1718         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1719         if (!qinfo.udata) {
1720                 rc = -ENOMEM;
1721                 goto out;
1722         }
1723         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1724         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1725         if (rc) {
1726                 if (copy_to_user(udata, qinfo.udata, 4))
1727                         rc = -EFAULT;
1728                 goto free_and_out;
1729         }
1730         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1731                 /* fails in case of GuestLAN QDIO mode */
1732                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1733         }
1734         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1735                 QETH_CARD_TEXT(card, 4, "qactf");
1736                 rc = -EFAULT;
1737                 goto free_and_out;
1738         }
1739         QETH_CARD_TEXT(card, 4, "qacts");
1740
1741 free_and_out:
1742         kfree(qinfo.udata);
1743 out:
1744         return rc;
1745 }
1746
1747 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1748                                     struct qeth_arp_cache_entry *entry,
1749                                     enum qeth_arp_process_subcmds arp_cmd)
1750 {
1751         struct qeth_arp_cache_entry *cmd_entry;
1752         struct qeth_cmd_buffer *iob;
1753         int rc;
1754
1755         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1756                 QETH_CARD_TEXT(card, 3, "arpadd");
1757         else
1758                 QETH_CARD_TEXT(card, 3, "arpdel");
1759
1760         /*
1761          * currently GuestLAN only supports the ARP assist function
1762          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1763          * thus we say EOPNOTSUPP for this ARP function
1764          */
1765         if (IS_VM_NIC(card))
1766                 return -EOPNOTSUPP;
1767         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1768                 return -EOPNOTSUPP;
1769         }
1770
1771         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1772                                        SETASS_DATA_SIZEOF(arp_entry),
1773                                        QETH_PROT_IPV4);
1774         if (!iob)
1775                 return -ENOMEM;
1776
1777         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1778         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1779         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1780         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1781         if (rc)
1782                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1783                                  arp_cmd, CARD_DEVID(card), rc);
1784         return rc;
1785 }
1786
1787 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1788 {
1789         struct qeth_cmd_buffer *iob;
1790         int rc;
1791
1792         QETH_CARD_TEXT(card, 3, "arpflush");
1793
1794         /*
1795          * currently GuestLAN only supports the ARP assist function
1796          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1797          * thus we say EOPNOTSUPP for this ARP function
1798         */
1799         if (IS_VM_NIC(card) || IS_IQD(card))
1800                 return -EOPNOTSUPP;
1801         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1802                 return -EOPNOTSUPP;
1803         }
1804
1805         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1806                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1807                                        QETH_PROT_IPV4);
1808         if (!iob)
1809                 return -ENOMEM;
1810
1811         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1812         if (rc)
1813                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1814                                  CARD_DEVID(card), rc);
1815         return rc;
1816 }
1817
1818 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1819 {
1820         struct qeth_card *card = dev->ml_priv;
1821         struct qeth_arp_cache_entry arp_entry;
1822         enum qeth_arp_process_subcmds arp_cmd;
1823         int rc = 0;
1824
1825         switch (cmd) {
1826         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1827                 if (!capable(CAP_NET_ADMIN)) {
1828                         rc = -EPERM;
1829                         break;
1830                 }
1831                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1832                 break;
1833         case SIOC_QETH_ARP_QUERY_INFO:
1834                 if (!capable(CAP_NET_ADMIN)) {
1835                         rc = -EPERM;
1836                         break;
1837                 }
1838                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1839                 break;
1840         case SIOC_QETH_ARP_ADD_ENTRY:
1841         case SIOC_QETH_ARP_REMOVE_ENTRY:
1842                 if (!capable(CAP_NET_ADMIN))
1843                         return -EPERM;
1844                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1845                         return -EFAULT;
1846
1847                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1848                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1849                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1850                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1851         case SIOC_QETH_ARP_FLUSH_CACHE:
1852                 if (!capable(CAP_NET_ADMIN)) {
1853                         rc = -EPERM;
1854                         break;
1855                 }
1856                 rc = qeth_l3_arp_flush_cache(card);
1857                 break;
1858         default:
1859                 rc = -EOPNOTSUPP;
1860         }
1861         return rc;
1862 }
1863
1864 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1865                                      int ipv)
1866 {
1867         struct neighbour *n = NULL;
1868
1869         if (dst)
1870                 n = dst_neigh_lookup_skb(dst, skb);
1871
1872         if (n) {
1873                 int cast_type = n->type;
1874
1875                 neigh_release(n);
1876                 if ((cast_type == RTN_BROADCAST) ||
1877                     (cast_type == RTN_MULTICAST) ||
1878                     (cast_type == RTN_ANYCAST))
1879                         return cast_type;
1880                 return RTN_UNICAST;
1881         }
1882
1883         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1884         switch (ipv) {
1885         case 4:
1886                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1887                         return RTN_BROADCAST;
1888                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1889                                 RTN_MULTICAST : RTN_UNICAST;
1890         case 6:
1891                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1892                                 RTN_MULTICAST : RTN_UNICAST;
1893         default:
1894                 /* ... and MAC address */
1895                 return qeth_get_ether_cast_type(skb);
1896         }
1897 }
1898
1899 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1900 {
1901         int ipv = qeth_get_ip_version(skb);
1902         struct dst_entry *dst;
1903         int cast_type;
1904
1905         rcu_read_lock();
1906         dst = qeth_dst_check_rcu(skb, ipv);
1907         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1908         rcu_read_unlock();
1909
1910         return cast_type;
1911 }
1912
1913 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1914 {
1915         if (cast_type == RTN_MULTICAST)
1916                 return QETH_CAST_MULTICAST;
1917         if (cast_type == RTN_ANYCAST)
1918                 return QETH_CAST_ANYCAST;
1919         if (cast_type == RTN_BROADCAST)
1920                 return QETH_CAST_BROADCAST;
1921         return QETH_CAST_UNICAST;
1922 }
1923
1924 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1925                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1926                                 int ipv, unsigned int data_len)
1927 {
1928         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1929         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1930         struct qeth_card *card = queue->card;
1931         struct dst_entry *dst;
1932         int cast_type;
1933
1934         hdr->hdr.l3.length = data_len;
1935
1936         if (skb_is_gso(skb)) {
1937                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1938         } else {
1939                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1940
1941                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1942                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1943                         l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
1944                         memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
1945                                iucv_trans_hdr(skb)->destUserID, 8);
1946                         return;
1947                 }
1948
1949                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1950                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1951                         /* some HW requires combined L3+L4 csum offload: */
1952                         if (ipv == 4)
1953                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1954                 }
1955         }
1956
1957         if (ipv == 4 || IS_IQD(card)) {
1958                 /* NETIF_F_HW_VLAN_CTAG_TX */
1959                 if (skb_vlan_tag_present(skb)) {
1960                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1961                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1962                 }
1963         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1964                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1965                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1966         }
1967
1968         rcu_read_lock();
1969         dst = qeth_dst_check_rcu(skb, ipv);
1970
1971         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1972                 cast_type = RTN_UNICAST;
1973         else
1974                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1975         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1976
1977         if (ipv == 4) {
1978                 struct rtable *rt = (struct rtable *) dst;
1979
1980                 *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
1981                                 rt_nexthop(rt, ip_hdr(skb)->daddr) :
1982                                 ip_hdr(skb)->daddr;
1983         } else if (ipv == 6) {
1984                 struct rt6_info *rt = (struct rt6_info *) dst;
1985
1986                 if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
1987                         l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
1988                 else
1989                         l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
1990
1991                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1992                 if (!IS_IQD(card))
1993                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1994         } else {
1995                 /* OSA only: */
1996                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1997         }
1998         rcu_read_unlock();
1999 }
2000
2001 static void qeth_l3_fixup_headers(struct sk_buff *skb)
2002 {
2003         struct iphdr *iph = ip_hdr(skb);
2004
2005         /* this is safe, IPv6 traffic takes a different path */
2006         if (skb->ip_summed == CHECKSUM_PARTIAL)
2007                 iph->check = 0;
2008         if (skb_is_gso(skb)) {
2009                 iph->tot_len = 0;
2010                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
2011                                                     iph->daddr, 0);
2012         }
2013 }
2014
2015 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
2016                         struct qeth_qdio_out_q *queue, int ipv)
2017 {
2018         unsigned int hw_hdr_len;
2019         int rc;
2020
2021         /* re-use the L2 header area for the HW header: */
2022         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
2023                                        sizeof(struct qeth_hdr);
2024         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
2025         if (rc)
2026                 return rc;
2027         skb_pull(skb, ETH_HLEN);
2028
2029         qeth_l3_fixup_headers(skb);
2030         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
2031 }
2032
2033 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
2034                                            struct net_device *dev)
2035 {
2036         struct qeth_card *card = dev->ml_priv;
2037         u16 txq = skb_get_queue_mapping(skb);
2038         int ipv = qeth_get_ip_version(skb);
2039         struct qeth_qdio_out_q *queue;
2040         int rc;
2041
2042         if (!skb_is_gso(skb))
2043                 qdisc_skb_cb(skb)->pkt_len = skb->len;
2044         if (IS_IQD(card)) {
2045                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
2046
2047                 if (card->options.sniffer)
2048                         goto tx_drop;
2049                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
2050                     (card->options.cq == QETH_CQ_ENABLED &&
2051                      skb->protocol != htons(ETH_P_AF_IUCV)))
2052                         goto tx_drop;
2053         } else {
2054                 queue = card->qdio.out_qs[txq];
2055         }
2056
2057         if (!(dev->flags & IFF_BROADCAST) &&
2058             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
2059                 goto tx_drop;
2060
2061         if (ipv == 4 || IS_IQD(card))
2062                 rc = qeth_l3_xmit(card, skb, queue, ipv);
2063         else
2064                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
2065
2066         if (!rc)
2067                 return NETDEV_TX_OK;
2068
2069 tx_drop:
2070         QETH_TXQ_STAT_INC(queue, tx_dropped);
2071         kfree_skb(skb);
2072         return NETDEV_TX_OK;
2073 }
2074
2075 static void qeth_l3_set_rx_mode(struct net_device *dev)
2076 {
2077         struct qeth_card *card = dev->ml_priv;
2078
2079         schedule_work(&card->rx_mode_work);
2080 }
2081
2082 /*
2083  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
2084  * NOARP on the netdevice is no option because it also turns off neighbor
2085  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
2086  * arp resolution but we want the hard header (packet socket will work
2087  * e.g. tcpdump)
2088  */
2089 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
2090 {
2091         n->nud_state = NUD_NOARP;
2092         memcpy(n->ha, "FAKELL", 6);
2093         n->output = n->ops->connected_output;
2094         return 0;
2095 }
2096
2097 static int
2098 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
2099 {
2100         if (np->tbl->family == AF_INET)
2101                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
2102
2103         return 0;
2104 }
2105
2106 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
2107                                                     struct net_device *dev,
2108                                                     netdev_features_t features)
2109 {
2110         if (qeth_get_ip_version(skb) != 4)
2111                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2112         return qeth_features_check(skb, dev, features);
2113 }
2114
2115 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
2116                                     struct net_device *sb_dev)
2117 {
2118         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
2119                                      sb_dev);
2120 }
2121
2122 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
2123                                     struct net_device *sb_dev)
2124 {
2125         struct qeth_card *card = dev->ml_priv;
2126
2127         return qeth_get_priority_queue(card, skb);
2128 }
2129
2130 static const struct net_device_ops qeth_l3_netdev_ops = {
2131         .ndo_open               = qeth_open,
2132         .ndo_stop               = qeth_stop,
2133         .ndo_get_stats64        = qeth_get_stats64,
2134         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2135         .ndo_select_queue       = qeth_l3_iqd_select_queue,
2136         .ndo_validate_addr      = eth_validate_addr,
2137         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2138         .ndo_do_ioctl           = qeth_do_ioctl,
2139         .ndo_fix_features       = qeth_fix_features,
2140         .ndo_set_features       = qeth_set_features,
2141         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2142         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2143         .ndo_tx_timeout         = qeth_tx_timeout,
2144 };
2145
2146 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
2147         .ndo_open               = qeth_open,
2148         .ndo_stop               = qeth_stop,
2149         .ndo_get_stats64        = qeth_get_stats64,
2150         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2151         .ndo_features_check     = qeth_l3_osa_features_check,
2152         .ndo_select_queue       = qeth_l3_osa_select_queue,
2153         .ndo_validate_addr      = eth_validate_addr,
2154         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2155         .ndo_do_ioctl           = qeth_do_ioctl,
2156         .ndo_fix_features       = qeth_fix_features,
2157         .ndo_set_features       = qeth_set_features,
2158         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2159         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2160         .ndo_tx_timeout         = qeth_tx_timeout,
2161         .ndo_neigh_setup        = qeth_l3_neigh_setup,
2162 };
2163
2164 static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
2165 {
2166         unsigned int headroom;
2167         int rc;
2168
2169         if (IS_OSD(card) || IS_OSX(card)) {
2170                 if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
2171                     (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
2172                         pr_info("qeth_l3: ignoring TR device\n");
2173                         return -ENODEV;
2174                 }
2175
2176                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
2177
2178                 /*IPv6 address autoconfiguration stuff*/
2179                 qeth_l3_get_unique_id(card);
2180                 if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
2181                         card->dev->dev_id = card->info.unique_id & 0xffff;
2182
2183                 if (!IS_VM_NIC(card)) {
2184                         card->dev->features |= NETIF_F_SG;
2185                         card->dev->hw_features |= NETIF_F_TSO |
2186                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2187                         card->dev->vlan_features |= NETIF_F_TSO |
2188                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2189                 }
2190
2191                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
2192                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
2193                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
2194                 }
2195                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
2196                         card->dev->hw_features |= NETIF_F_TSO6;
2197                         card->dev->vlan_features |= NETIF_F_TSO6;
2198                 }
2199
2200                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
2201                 if (card->dev->hw_features & NETIF_F_TSO6)
2202                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
2203                 else if (card->dev->hw_features & NETIF_F_TSO)
2204                         headroom = sizeof(struct qeth_hdr_tso);
2205                 else
2206                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
2207         } else if (IS_IQD(card)) {
2208                 card->dev->flags |= IFF_NOARP;
2209                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
2210                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
2211
2212                 rc = qeth_l3_iqd_read_initial_mac(card);
2213                 if (rc)
2214                         goto out;
2215         } else
2216                 return -ENODEV;
2217
2218         card->dev->needed_headroom = headroom;
2219         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
2220                                 NETIF_F_HW_VLAN_CTAG_RX |
2221                                 NETIF_F_HW_VLAN_CTAG_FILTER;
2222
2223         netif_keep_dst(card->dev);
2224         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
2225                 netif_set_gso_max_size(card->dev,
2226                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
2227
2228         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
2229         rc = register_netdev(card->dev);
2230         if (!rc && carrier_ok)
2231                 netif_carrier_on(card->dev);
2232
2233 out:
2234         if (rc)
2235                 card->dev->netdev_ops = NULL;
2236         return rc;
2237 }
2238
2239 static const struct device_type qeth_l3_devtype = {
2240         .name = "qeth_layer3",
2241         .groups = qeth_l3_attr_groups,
2242 };
2243
2244 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
2245 {
2246         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2247         int rc;
2248
2249         hash_init(card->ip_htable);
2250         mutex_init(&card->ip_lock);
2251         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
2252                                                dev_name(&gdev->dev));
2253         if (!card->cmd_wq)
2254                 return -ENOMEM;
2255
2256         if (gdev->dev.type == &qeth_generic_devtype) {
2257                 rc = qeth_l3_create_device_attributes(&gdev->dev);
2258                 if (rc) {
2259                         destroy_workqueue(card->cmd_wq);
2260                         return rc;
2261                 }
2262         }
2263
2264         hash_init(card->ip_mc_htable);
2265         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
2266         return 0;
2267 }
2268
2269 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2270 {
2271         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2272
2273         if (cgdev->dev.type == &qeth_generic_devtype)
2274                 qeth_l3_remove_device_attributes(&cgdev->dev);
2275
2276         qeth_set_allowed_threads(card, 0, 1);
2277         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2278
2279         if (cgdev->state == CCWGROUP_ONLINE)
2280                 qeth_l3_set_offline(cgdev);
2281
2282         cancel_work_sync(&card->close_dev_work);
2283         if (qeth_netdev_is_registered(card->dev))
2284                 unregister_netdev(card->dev);
2285
2286         flush_workqueue(card->cmd_wq);
2287         destroy_workqueue(card->cmd_wq);
2288         qeth_l3_clear_ip_htable(card, 0);
2289         qeth_l3_clear_ipato_list(card);
2290 }
2291
2292 static int qeth_l3_set_online(struct ccwgroup_device *gdev)
2293 {
2294         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2295         struct net_device *dev = card->dev;
2296         int rc = 0;
2297         bool carrier_ok;
2298
2299         mutex_lock(&card->discipline_mutex);
2300         mutex_lock(&card->conf_mutex);
2301         QETH_CARD_TEXT(card, 2, "setonlin");
2302
2303         rc = qeth_core_hardsetup_card(card, &carrier_ok);
2304         if (rc) {
2305                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2306                 rc = -ENODEV;
2307                 goto out_remove;
2308         }
2309
2310         card->state = CARD_STATE_HARDSETUP;
2311         qeth_print_status_message(card);
2312
2313         /* softsetup */
2314         QETH_CARD_TEXT(card, 2, "softsetp");
2315
2316         rc = qeth_l3_setadapter_parms(card);
2317         if (rc)
2318                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2319         if (!card->options.sniffer) {
2320                 rc = qeth_l3_start_ipassists(card);
2321                 if (rc) {
2322                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2323                         goto out_remove;
2324                 }
2325                 rc = qeth_l3_setrouting_v4(card);
2326                 if (rc)
2327                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2328                 rc = qeth_l3_setrouting_v6(card);
2329                 if (rc)
2330                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2331         }
2332
2333         rc = qeth_init_qdio_queues(card);
2334         if (rc) {
2335                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2336                 rc = -ENODEV;
2337                 goto out_remove;
2338         }
2339         card->state = CARD_STATE_SOFTSETUP;
2340
2341         qeth_set_allowed_threads(card, 0xffffffff, 0);
2342         qeth_l3_recover_ip(card);
2343
2344         if (!qeth_netdev_is_registered(dev)) {
2345                 rc = qeth_l3_setup_netdev(card, carrier_ok);
2346                 if (rc)
2347                         goto out_remove;
2348         } else {
2349                 rtnl_lock();
2350                 if (carrier_ok)
2351                         netif_carrier_on(dev);
2352                 else
2353                         netif_carrier_off(dev);
2354
2355                 netif_device_attach(dev);
2356                 qeth_enable_hw_features(dev);
2357
2358                 if (card->info.open_when_online) {
2359                         card->info.open_when_online = 0;
2360                         dev_open(dev, NULL);
2361                 }
2362                 rtnl_unlock();
2363         }
2364         qeth_trace_features(card);
2365         /* let user_space know that device is online */
2366         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2367         mutex_unlock(&card->conf_mutex);
2368         mutex_unlock(&card->discipline_mutex);
2369         return 0;
2370 out_remove:
2371         qeth_l3_stop_card(card);
2372         ccw_device_set_offline(CARD_DDEV(card));
2373         ccw_device_set_offline(CARD_WDEV(card));
2374         ccw_device_set_offline(CARD_RDEV(card));
2375         qdio_free(CARD_DDEV(card));
2376
2377         mutex_unlock(&card->conf_mutex);
2378         mutex_unlock(&card->discipline_mutex);
2379         return rc;
2380 }
2381
2382 static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
2383                         int recovery_mode)
2384 {
2385         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2386         int rc = 0, rc2 = 0, rc3 = 0;
2387
2388         mutex_lock(&card->discipline_mutex);
2389         mutex_lock(&card->conf_mutex);
2390         QETH_CARD_TEXT(card, 3, "setoffl");
2391
2392         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
2393                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2394                 card->info.hwtrap = 1;
2395         }
2396
2397         rtnl_lock();
2398         card->info.open_when_online = card->dev->flags & IFF_UP;
2399         dev_close(card->dev);
2400         netif_device_detach(card->dev);
2401         netif_carrier_off(card->dev);
2402         rtnl_unlock();
2403
2404         qeth_l3_stop_card(card);
2405         if (card->options.cq == QETH_CQ_ENABLED) {
2406                 rtnl_lock();
2407                 call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
2408                 rtnl_unlock();
2409         }
2410         rc  = ccw_device_set_offline(CARD_DDEV(card));
2411         rc2 = ccw_device_set_offline(CARD_WDEV(card));
2412         rc3 = ccw_device_set_offline(CARD_RDEV(card));
2413         if (!rc)
2414                 rc = (rc2) ? rc2 : rc3;
2415         if (rc)
2416                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2417         qdio_free(CARD_DDEV(card));
2418
2419         /* let user_space know that device is offline */
2420         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
2421         mutex_unlock(&card->conf_mutex);
2422         mutex_unlock(&card->discipline_mutex);
2423         return 0;
2424 }
2425
2426 static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
2427 {
2428         return __qeth_l3_set_offline(cgdev, 0);
2429 }
2430
2431 static int qeth_l3_recover(void *ptr)
2432 {
2433         struct qeth_card *card;
2434         int rc = 0;
2435
2436         card = (struct qeth_card *) ptr;
2437         QETH_CARD_TEXT(card, 2, "recover1");
2438         QETH_CARD_HEX(card, 2, &card, sizeof(void *));
2439         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
2440                 return 0;
2441         QETH_CARD_TEXT(card, 2, "recover2");
2442         dev_warn(&card->gdev->dev,
2443                 "A recovery process has been started for the device\n");
2444         __qeth_l3_set_offline(card->gdev, 1);
2445         rc = qeth_l3_set_online(card->gdev);
2446         if (!rc)
2447                 dev_info(&card->gdev->dev,
2448                         "Device successfully recovered!\n");
2449         else {
2450                 ccwgroup_set_offline(card->gdev);
2451                 dev_warn(&card->gdev->dev, "The qeth device driver "
2452                                 "failed to recover an error on the device\n");
2453         }
2454         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
2455         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
2456         return 0;
2457 }
2458
2459 /* Returns zero if the command is successfully "consumed" */
2460 static int qeth_l3_control_event(struct qeth_card *card,
2461                                         struct qeth_ipa_cmd *cmd)
2462 {
2463         return 1;
2464 }
2465
2466 struct qeth_discipline qeth_l3_discipline = {
2467         .devtype = &qeth_l3_devtype,
2468         .process_rx_buffer = qeth_l3_process_inbound_buffer,
2469         .recover = qeth_l3_recover,
2470         .setup = qeth_l3_probe_device,
2471         .remove = qeth_l3_remove_device,
2472         .set_online = qeth_l3_set_online,
2473         .set_offline = qeth_l3_set_offline,
2474         .do_ioctl = qeth_l3_do_ioctl,
2475         .control_event_handler = qeth_l3_control_event,
2476 };
2477 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2478
2479 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2480                                    struct qeth_ipaddr *addr,
2481                                    unsigned long event)
2482 {
2483         switch (event) {
2484         case NETDEV_UP:
2485                 qeth_l3_modify_ip(card, addr, true);
2486                 return NOTIFY_OK;
2487         case NETDEV_DOWN:
2488                 qeth_l3_modify_ip(card, addr, false);
2489                 return NOTIFY_OK;
2490         default:
2491                 return NOTIFY_DONE;
2492         }
2493 }
2494
2495 struct qeth_l3_ip_event_work {
2496         struct work_struct work;
2497         struct qeth_card *card;
2498         struct qeth_ipaddr addr;
2499 };
2500
2501 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2502
2503 static void qeth_l3_add_ip_worker(struct work_struct *work)
2504 {
2505         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2506
2507         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2508         kfree(work);
2509 }
2510
2511 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2512 {
2513         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2514
2515         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2516         kfree(work);
2517 }
2518
2519 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2520 {
2521         if (is_vlan_dev(dev))
2522                 dev = vlan_dev_real_dev(dev);
2523         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2524             dev->netdev_ops == &qeth_l3_netdev_ops)
2525                 return (struct qeth_card *) dev->ml_priv;
2526         return NULL;
2527 }
2528
2529 static int qeth_l3_ip_event(struct notifier_block *this,
2530                             unsigned long event, void *ptr)
2531 {
2532
2533         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2534         struct net_device *dev = ifa->ifa_dev->dev;
2535         struct qeth_ipaddr addr;
2536         struct qeth_card *card;
2537
2538         if (dev_net(dev) != &init_net)
2539                 return NOTIFY_DONE;
2540
2541         card = qeth_l3_get_card_from_dev(dev);
2542         if (!card)
2543                 return NOTIFY_DONE;
2544         QETH_CARD_TEXT(card, 3, "ipevent");
2545
2546         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2547         addr.u.a4.addr = ifa->ifa_address;
2548         addr.u.a4.mask = be32_to_cpu(ifa->ifa_mask);
2549
2550         return qeth_l3_handle_ip_event(card, &addr, event);
2551 }
2552
2553 static struct notifier_block qeth_l3_ip_notifier = {
2554         qeth_l3_ip_event,
2555         NULL,
2556 };
2557
2558 static int qeth_l3_ip6_event(struct notifier_block *this,
2559                              unsigned long event, void *ptr)
2560 {
2561         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2562         struct net_device *dev = ifa->idev->dev;
2563         struct qeth_l3_ip_event_work *ip_work;
2564         struct qeth_card *card;
2565
2566         if (event != NETDEV_UP && event != NETDEV_DOWN)
2567                 return NOTIFY_DONE;
2568
2569         card = qeth_l3_get_card_from_dev(dev);
2570         if (!card)
2571                 return NOTIFY_DONE;
2572         QETH_CARD_TEXT(card, 3, "ip6event");
2573         if (!qeth_is_supported(card, IPA_IPV6))
2574                 return NOTIFY_DONE;
2575
2576         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2577         if (!ip_work)
2578                 return NOTIFY_DONE;
2579
2580         if (event == NETDEV_UP)
2581                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2582         else
2583                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2584
2585         ip_work->card = card;
2586         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2587                             QETH_PROT_IPV6);
2588         ip_work->addr.u.a6.addr = ifa->addr;
2589         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2590
2591         queue_work(card->cmd_wq, &ip_work->work);
2592         return NOTIFY_OK;
2593 }
2594
2595 static struct notifier_block qeth_l3_ip6_notifier = {
2596         qeth_l3_ip6_event,
2597         NULL,
2598 };
2599
2600 static int qeth_l3_register_notifiers(void)
2601 {
2602         int rc;
2603
2604         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2605         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2606         if (rc)
2607                 return rc;
2608         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2609         if (rc) {
2610                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2611                 return rc;
2612         }
2613         return 0;
2614 }
2615
2616 static void qeth_l3_unregister_notifiers(void)
2617 {
2618         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2619         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2620         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2621 }
2622
2623 static int __init qeth_l3_init(void)
2624 {
2625         pr_info("register layer 3 discipline\n");
2626         return qeth_l3_register_notifiers();
2627 }
2628
2629 static void __exit qeth_l3_exit(void)
2630 {
2631         qeth_l3_unregister_notifiers();
2632         pr_info("unregister layer 3 discipline\n");
2633 }
2634
2635 module_init(qeth_l3_init);
2636 module_exit(qeth_l3_exit);
2637 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
2638 MODULE_DESCRIPTION("qeth layer 3 discipline");
2639 MODULE_LICENSE("GPL");