drivers/s390/net/qeth_l3_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/bitops.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/ip.h>
  21 #include <linux/in.h>
  22 #include <linux/ipv6.h>
  23 #include <linux/inetdevice.h>
  24 #include <linux/igmp.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_ether.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/skbuff.h>
  29
  30 #include <net/ip.h>
  31 #include <net/arp.h>
  32 #include <net/route.h>
  33 #include <net/ipv6.h>
  34 #include <net/ip6_route.h>
  35 #include <net/iucv/af_iucv.h>
  36 #include <linux/hashtable.h>
  37
  38 #include "qeth_l3.h"
  39
  40 static int qeth_l3_register_addr_entry(struct qeth_card *,
  41                 struct qeth_ipaddr *);
  42 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  43                 struct qeth_ipaddr *);
  44
  45 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
  46                              char *buf)
  47 {
  48         if (proto == QETH_PROT_IPV4)
  49                 return sprintf(buf, "%pI4", addr);
  50         else
  51                 return sprintf(buf, "%pI6", addr);
  52 }
  53
  54 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  55                                                    struct qeth_ipaddr *query)
  56 {
  57         u32 key = qeth_l3_ipaddr_hash(query);
  58         struct qeth_ipaddr *addr;
  59
  60         if (query->is_multicast) {
  61                 hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
  62                         if (qeth_l3_addr_match_ip(addr, query))
  63                                 return addr;
  64         } else {
  65                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  66                         if (qeth_l3_addr_match_ip(addr, query))
  67                                 return addr;
  68         }
  69         return NULL;
  70 }
  71
  72 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  73 {
  74         int i, j;
  75         u8 octet;
  76
  77         for (i = 0; i < len; ++i) {
  78                 octet = addr[i];
  79                 for (j = 7; j >= 0; --j) {
  80                         bits[i*8 + j] = octet & 1;
  81                         octet >>= 1;
  82                 }
  83         }
  84 }
  85
  86 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
  87                                              struct qeth_ipaddr *addr)
  88 {
  89         struct qeth_ipato_entry *ipatoe;
  90         u8 addr_bits[128] = {0, };
  91         u8 ipatoe_bits[128] = {0, };
  92         int rc = 0;
  93
  94         if (!card->ipato.enabled)
  95                 return false;
  96         if (addr->type != QETH_IP_TYPE_NORMAL)
  97                 return false;
  98
  99         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 100                                   (addr->proto == QETH_PROT_IPV4)? 4:16);
 101         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 102                 if (addr->proto != ipatoe->proto)
 103                         continue;
 104                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 105                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 106                                           4 : 16);
 107                 if (addr->proto == QETH_PROT_IPV4)
 108                         rc = !memcmp(addr_bits, ipatoe_bits,
 109                                      min(32, ipatoe->mask_bits));
 110                 else
 111                         rc = !memcmp(addr_bits, ipatoe_bits,
 112                                      min(128, ipatoe->mask_bits));
 113                 if (rc)
 114                         break;
 115         }
 116         /* invert? */
 117         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 118                 rc = !rc;
 119         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 120                 rc = !rc;
 121
 122         return rc;
 123 }
 124
 125 static int qeth_l3_delete_ip(struct qeth_card *card,
 126                              struct qeth_ipaddr *tmp_addr)
 127 {
 128         int rc = 0;
 129         struct qeth_ipaddr *addr;
 130
 131         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 132                 QETH_CARD_TEXT(card, 2, "delrxip");
 133         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 134                 QETH_CARD_TEXT(card, 2, "delvipa");
 135         else
 136                 QETH_CARD_TEXT(card, 2, "delip");
 137
 138         if (tmp_addr->proto == QETH_PROT_IPV4)
 139                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 140         else {
 141                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 142                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 143         }
 144
 145         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 146         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 147                 return -ENOENT;
 148
 149         addr->ref_counter--;
 150         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 151                 return rc;
 152
 153         if (qeth_card_hw_is_reachable(card))
 154                 rc = qeth_l3_deregister_addr_entry(card, addr);
 155
 156         hash_del(&addr->hnode);
 157         kfree(addr);
 158
 159         return rc;
 160 }
 161
 162 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 163 {
 164         int rc = 0;
 165         struct qeth_ipaddr *addr;
 166         char buf[40];
 167
 168         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 169                 QETH_CARD_TEXT(card, 2, "addrxip");
 170         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 171                 QETH_CARD_TEXT(card, 2, "addvipa");
 172         else
 173                 QETH_CARD_TEXT(card, 2, "addip");
 174
 175         if (tmp_addr->proto == QETH_PROT_IPV4)
 176                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 177         else {
 178                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 179                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 180         }
 181
 182         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 183         if (addr) {
 184                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 185                         return -EADDRINUSE;
 186                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 187                         addr->ref_counter++;
 188                         return 0;
 189                 }
 190                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 191                                          buf);
 192                 dev_warn(&card->gdev->dev,
 193                          "Registering IP address %s failed\n", buf);
 194                 return -EADDRINUSE;
 195         } else {
 196                 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 197                 if (!addr)
 198                         return -ENOMEM;
 199
 200                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 201                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 202                         addr->ipato = 1;
 203                 }
 204                 hash_add(card->ip_htable, &addr->hnode,
 205                                 qeth_l3_ipaddr_hash(addr));
 206
 207                 if (!qeth_card_hw_is_reachable(card)) {
 208                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 209                         return 0;
 210                 }
 211
 212                 rc = qeth_l3_register_addr_entry(card, addr);
 213
 214                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 215                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 216                 } else {
 217                         hash_del(&addr->hnode);
 218                         kfree(addr);
 219                 }
 220         }
 221         return rc;
 222 }
 223
 224 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 225                              bool add)
 226 {
 227         int rc;
 228
 229         mutex_lock(&card->ip_lock);
 230         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 231         mutex_unlock(&card->ip_lock);
 232
 233         return rc;
 234 }
 235
 236 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 237 {
 238         struct qeth_ipaddr *addr;
 239         struct hlist_node *tmp;
 240         int i;
 241
 242         hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
 243                 hash_del(&addr->hnode);
 244                 kfree(addr);
 245         }
 246 }
 247
 248 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 249 {
 250         struct qeth_ipaddr *addr;
 251         struct hlist_node *tmp;
 252         int i;
 253
 254         QETH_CARD_TEXT(card, 4, "clearip");
 255
 256         mutex_lock(&card->ip_lock);
 257
 258         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 259                 if (!recover) {
 260                         hash_del(&addr->hnode);
 261                         kfree(addr);
 262                         continue;
 263                 }
 264                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 265         }
 266
 267         mutex_unlock(&card->ip_lock);
 268 }
 269
 270 static void qeth_l3_recover_ip(struct qeth_card *card)
 271 {
 272         struct qeth_ipaddr *addr;
 273         struct hlist_node *tmp;
 274         int i;
 275         int rc;
 276
 277         QETH_CARD_TEXT(card, 4, "recovrip");
 278
 279         mutex_lock(&card->ip_lock);
 280
 281         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 282                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 283                         rc = qeth_l3_register_addr_entry(card, addr);
 284
 285                         if (!rc) {
 286                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 287                         } else {
 288                                 hash_del(&addr->hnode);
 289                                 kfree(addr);
 290                         }
 291                 }
 292         }
 293
 294         mutex_unlock(&card->ip_lock);
 295 }
 296
 297 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 298                                unsigned long data)
 299 {
 300         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 301
 302         switch (cmd->hdr.return_code) {
 303         case IPA_RC_SUCCESS:
 304                 return 0;
 305         case IPA_RC_DUPLICATE_IP_ADDRESS:
 306                 return -EADDRINUSE;
 307         case IPA_RC_MC_ADDR_NOT_FOUND:
 308                 return -ENOENT;
 309         case IPA_RC_LAN_OFFLINE:
 310                 return -ENETDOWN;
 311         default:
 312                 return -EIO;
 313         }
 314 }
 315
 316 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 317                         struct qeth_ipaddr *addr, int ipacmd)
 318 {
 319         struct qeth_cmd_buffer *iob;
 320         struct qeth_ipa_cmd *cmd;
 321
 322         QETH_CARD_TEXT(card, 4, "setdelmc");
 323
 324         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 325                                  IPA_DATA_SIZEOF(setdelipm));
 326         if (!iob)
 327                 return -ENOMEM;
 328         cmd = __ipa_cmd(iob);
 329         if (addr->proto == QETH_PROT_IPV6) {
 330                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 331                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 332         } else {
 333                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 334                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 335         }
 336
 337         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 338 }
 339
 340 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 341 {
 342         unsigned int i = 0;
 343
 344         while (len && i < 4) {
 345                 int mask_len = min_t(int, len, 32);
 346
 347                 prefix->s6_addr32[i] = inet_make_mask(mask_len);
 348                 len -= mask_len;
 349                 i++;
 350         }
 351 }
 352
 353 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 354 {
 355         switch (addr->type) {
 356         case QETH_IP_TYPE_RXIP:
 357                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 358         case QETH_IP_TYPE_VIPA:
 359                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 360                                QETH_IPA_DELIP_VIPA_FLAG;
 361         default:
 362                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 363         }
 364 }
 365
 366 static int qeth_l3_send_setdelip(struct qeth_card *card,
 367                                  struct qeth_ipaddr *addr,
 368                                  enum qeth_ipa_cmds ipacmd)
 369 {
 370         struct qeth_cmd_buffer *iob;
 371         struct qeth_ipa_cmd *cmd;
 372         u32 flags;
 373
 374         QETH_CARD_TEXT(card, 4, "setdelip");
 375
 376         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 377                                  IPA_DATA_SIZEOF(setdelip6));
 378         if (!iob)
 379                 return -ENOMEM;
 380         cmd = __ipa_cmd(iob);
 381
 382         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 383         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 384
 385         if (addr->proto == QETH_PROT_IPV6) {
 386                 cmd->data.setdelip6.addr = addr->u.a6.addr;
 387                 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 388                                         addr->u.a6.pfxlen);
 389                 cmd->data.setdelip6.flags = flags;
 390         } else {
 391                 cmd->data.setdelip4.addr = addr->u.a4.addr;
 392                 cmd->data.setdelip4.mask = addr->u.a4.mask;
 393                 cmd->data.setdelip4.flags = flags;
 394         }
 395
 396         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 397 }
 398
 399 static int qeth_l3_send_setrouting(struct qeth_card *card,
 400         enum qeth_routing_types type, enum qeth_prot_versions prot)
 401 {
 402         int rc;
 403         struct qeth_ipa_cmd *cmd;
 404         struct qeth_cmd_buffer *iob;
 405
 406         QETH_CARD_TEXT(card, 4, "setroutg");
 407         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 408                                  IPA_DATA_SIZEOF(setrtg));
 409         if (!iob)
 410                 return -ENOMEM;
 411         cmd = __ipa_cmd(iob);
 412         cmd->data.setrtg.type = (type);
 413         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 414
 415         return rc;
 416 }
 417
 418 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 419                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 420 {
 421         if (IS_IQD(card)) {
 422                 switch (*type) {
 423                 case NO_ROUTER:
 424                 case PRIMARY_CONNECTOR:
 425                 case SECONDARY_CONNECTOR:
 426                 case MULTICAST_ROUTER:
 427                         return 0;
 428                 default:
 429                         goto out_inval;
 430                 }
 431         } else {
 432                 switch (*type) {
 433                 case NO_ROUTER:
 434                 case PRIMARY_ROUTER:
 435                 case SECONDARY_ROUTER:
 436                         return 0;
 437                 case MULTICAST_ROUTER:
 438                         if (qeth_is_ipafunc_supported(card, prot,
 439                                                       IPA_OSA_MC_ROUTER))
 440                                 return 0;
 441                 default:
 442                         goto out_inval;
 443                 }
 444         }
 445 out_inval:
 446         *type = NO_ROUTER;
 447         return -EINVAL;
 448 }
 449
 450 int qeth_l3_setrouting_v4(struct qeth_card *card)
 451 {
 452         int rc;
 453
 454         QETH_CARD_TEXT(card, 3, "setrtg4");
 455
 456         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 457                                   QETH_PROT_IPV4);
 458         if (rc)
 459                 return rc;
 460
 461         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 462                                   QETH_PROT_IPV4);
 463         if (rc) {
 464                 card->options.route4.type = NO_ROUTER;
 465                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 466                                  rc, CARD_DEVID(card));
 467         }
 468         return rc;
 469 }
 470
 471 int qeth_l3_setrouting_v6(struct qeth_card *card)
 472 {
 473         int rc = 0;
 474
 475         QETH_CARD_TEXT(card, 3, "setrtg6");
 476
 477         if (!qeth_is_supported(card, IPA_IPV6))
 478                 return 0;
 479         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 480                                   QETH_PROT_IPV6);
 481         if (rc)
 482                 return rc;
 483
 484         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 485                                   QETH_PROT_IPV6);
 486         if (rc) {
 487                 card->options.route6.type = NO_ROUTER;
 488                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 489                                  rc, CARD_DEVID(card));
 490         }
 491         return rc;
 492 }
 493
 494 /*
 495  * IP address takeover related functions
 496  */
 497
 498 /**
 499  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 500  *
 501  * Caller must hold ip_lock.
 502  */
 503 void qeth_l3_update_ipato(struct qeth_card *card)
 504 {
 505         struct qeth_ipaddr *addr;
 506         unsigned int i;
 507
 508         hash_for_each(card->ip_htable, i, addr, hnode) {
 509                 if (addr->type != QETH_IP_TYPE_NORMAL)
 510                         continue;
 511                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 512         }
 513 }
 514
 515 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 516 {
 517         struct qeth_ipato_entry *ipatoe, *tmp;
 518
 519         mutex_lock(&card->ip_lock);
 520
 521         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 522                 list_del(&ipatoe->entry);
 523                 kfree(ipatoe);
 524         }
 525
 526         qeth_l3_update_ipato(card);
 527         mutex_unlock(&card->ip_lock);
 528 }
 529
 530 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 531                                 struct qeth_ipato_entry *new)
 532 {
 533         struct qeth_ipato_entry *ipatoe;
 534         int rc = 0;
 535
 536         QETH_CARD_TEXT(card, 2, "addipato");
 537
 538         mutex_lock(&card->conf_mutex);
 539         mutex_lock(&card->ip_lock);
 540
 541         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 542                 if (ipatoe->proto != new->proto)
 543                         continue;
 544                 if (!memcmp(ipatoe->addr, new->addr,
 545                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 546                     (ipatoe->mask_bits == new->mask_bits)) {
 547                         rc = -EEXIST;
 548                         break;
 549                 }
 550         }
 551
 552         if (!rc) {
 553                 list_add_tail(&new->entry, &card->ipato.entries);
 554                 qeth_l3_update_ipato(card);
 555         }
 556
 557         mutex_unlock(&card->ip_lock);
 558         mutex_unlock(&card->conf_mutex);
 559
 560         return rc;
 561 }
 562
 563 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 564                             enum qeth_prot_versions proto, u8 *addr,
 565                             int mask_bits)
 566 {
 567         struct qeth_ipato_entry *ipatoe, *tmp;
 568         int rc = -ENOENT;
 569
 570         QETH_CARD_TEXT(card, 2, "delipato");
 571
 572         mutex_lock(&card->conf_mutex);
 573         mutex_lock(&card->ip_lock);
 574
 575         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 576                 if (ipatoe->proto != proto)
 577                         continue;
 578                 if (!memcmp(ipatoe->addr, addr,
 579                             (proto == QETH_PROT_IPV4)? 4:16) &&
 580                     (ipatoe->mask_bits == mask_bits)) {
 581                         list_del(&ipatoe->entry);
 582                         qeth_l3_update_ipato(card);
 583                         kfree(ipatoe);
 584                         rc = 0;
 585                 }
 586         }
 587
 588         mutex_unlock(&card->ip_lock);
 589         mutex_unlock(&card->conf_mutex);
 590
 591         return rc;
 592 }
 593
 594 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 595                              enum qeth_ip_types type,
 596                              enum qeth_prot_versions proto)
 597 {
 598         struct qeth_ipaddr addr;
 599         int rc;
 600
 601         qeth_l3_init_ipaddr(&addr, type, proto);
 602         if (proto == QETH_PROT_IPV4)
 603                 memcpy(&addr.u.a4.addr, ip, 4);
 604         else
 605                 memcpy(&addr.u.a6.addr, ip, 16);
 606
 607         mutex_lock(&card->conf_mutex);
 608         rc = qeth_l3_modify_ip(card, &addr, add);
 609         mutex_unlock(&card->conf_mutex);
 610
 611         return rc;
 612 }
 613
 614 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 615 {
 616         struct qeth_ipaddr addr;
 617         unsigned int i;
 618
 619         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 620         addr.u.a6.addr.s6_addr[0] = 0xfe;
 621         addr.u.a6.addr.s6_addr[1] = 0x80;
 622         for (i = 0; i < 8; i++)
 623                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 624
 625         return qeth_l3_modify_ip(card, &addr, add);
 626 }
 627
 628 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 629                                 struct qeth_ipaddr *addr)
 630 {
 631         char buf[50];
 632         int rc = 0;
 633         int cnt = 3;
 634
 635         if (card->options.sniffer)
 636                 return 0;
 637
 638         if (addr->proto == QETH_PROT_IPV4) {
 639                 QETH_CARD_TEXT(card, 2, "setaddr4");
 640                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 641         } else if (addr->proto == QETH_PROT_IPV6) {
 642                 QETH_CARD_TEXT(card, 2, "setaddr6");
 643                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 644                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 645         } else {
 646                 QETH_CARD_TEXT(card, 2, "setaddr?");
 647                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 648         }
 649         do {
 650                 if (addr->is_multicast)
 651                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 652                 else
 653                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 654                 if (rc)
 655                         QETH_CARD_TEXT(card, 2, "failed");
 656         } while ((--cnt > 0) && rc);
 657         if (rc) {
 658                 QETH_CARD_TEXT(card, 2, "FAILED");
 659                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 660                 dev_warn(&card->gdev->dev,
 661                         "Registering IP address %s failed\n", buf);
 662         }
 663         return rc;
 664 }
 665
 666 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 667                                                 struct qeth_ipaddr *addr)
 668 {
 669         int rc = 0;
 670
 671         if (card->options.sniffer)
 672                 return 0;
 673
 674         if (addr->proto == QETH_PROT_IPV4) {
 675                 QETH_CARD_TEXT(card, 2, "deladdr4");
 676                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 677         } else if (addr->proto == QETH_PROT_IPV6) {
 678                 QETH_CARD_TEXT(card, 2, "deladdr6");
 679                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 680                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 681         } else {
 682                 QETH_CARD_TEXT(card, 2, "deladdr?");
 683                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 684         }
 685         if (addr->is_multicast)
 686                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 687         else
 688                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 689         if (rc)
 690                 QETH_CARD_TEXT(card, 2, "failed");
 691
 692         return rc;
 693 }
 694
 695 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 696 {
 697         int rc = 0;
 698
 699         QETH_CARD_TEXT(card, 2, "setadprm");
 700
 701         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 702                 rc = qeth_setadpparms_change_macaddr(card);
 703                 if (rc)
 704                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 705                                 " address failed\n");
 706         }
 707
 708         return rc;
 709 }
 710
 711 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 712 {
 713         int rc;
 714
 715         QETH_CARD_TEXT(card, 3, "ipaarp");
 716
 717         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 718                 dev_info(&card->gdev->dev,
 719                         "ARP processing not supported on %s!\n",
 720                         QETH_CARD_IFNAME(card));
 721                 return 0;
 722         }
 723         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 724                                           IPA_CMD_ASS_START, NULL);
 725         if (rc) {
 726                 dev_warn(&card->gdev->dev,
 727                         "Starting ARP processing support for %s failed\n",
 728                         QETH_CARD_IFNAME(card));
 729         }
 730         return rc;
 731 }
 732
 733 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 734 {
 735         int rc;
 736
 737         QETH_CARD_TEXT(card, 3, "stsrcmac");
 738
 739         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 740                 dev_info(&card->gdev->dev,
 741                         "Inbound source MAC-address not supported on %s\n",
 742                         QETH_CARD_IFNAME(card));
 743                 return -EOPNOTSUPP;
 744         }
 745
 746         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 747                                           IPA_CMD_ASS_START, NULL);
 748         if (rc)
 749                 dev_warn(&card->gdev->dev,
 750                         "Starting source MAC-address support for %s failed\n",
 751                         QETH_CARD_IFNAME(card));
 752         return rc;
 753 }
 754
 755 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 756 {
 757         int rc = 0;
 758
 759         QETH_CARD_TEXT(card, 3, "strtvlan");
 760
 761         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 762                 dev_info(&card->gdev->dev,
 763                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 764                 return -EOPNOTSUPP;
 765         }
 766
 767         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 768                                           IPA_CMD_ASS_START, NULL);
 769         if (rc) {
 770                 dev_warn(&card->gdev->dev,
 771                         "Starting VLAN support for %s failed\n",
 772                         QETH_CARD_IFNAME(card));
 773         } else {
 774                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 775         }
 776         return rc;
 777 }
 778
 779 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 780 {
 781         int rc;
 782
 783         QETH_CARD_TEXT(card, 3, "stmcast");
 784
 785         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 786                 dev_info(&card->gdev->dev,
 787                         "Multicast not supported on %s\n",
 788                         QETH_CARD_IFNAME(card));
 789                 return -EOPNOTSUPP;
 790         }
 791
 792         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 793                                           IPA_CMD_ASS_START, NULL);
 794         if (rc) {
 795                 dev_warn(&card->gdev->dev,
 796                         "Starting multicast support for %s failed\n",
 797                         QETH_CARD_IFNAME(card));
 798         } else {
 799                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 800                 card->dev->flags |= IFF_MULTICAST;
 801         }
 802         return rc;
 803 }
 804
 805 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 806 {
 807         u32 ipv6_data = 3;
 808         int rc;
 809
 810         QETH_CARD_TEXT(card, 3, "softipv6");
 811
 812         if (IS_IQD(card))
 813                 goto out;
 814
 815         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 816                                           &ipv6_data);
 817         if (rc) {
 818                 dev_err(&card->gdev->dev,
 819                         "Activating IPv6 support for %s failed\n",
 820                         QETH_CARD_IFNAME(card));
 821                 return rc;
 822         }
 823         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 824                                              NULL);
 825         if (rc) {
 826                 dev_err(&card->gdev->dev,
 827                         "Activating IPv6 support for %s failed\n",
 828                          QETH_CARD_IFNAME(card));
 829                 return rc;
 830         }
 831         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 832                                              IPA_CMD_ASS_START, NULL);
 833         if (rc) {
 834                 dev_warn(&card->gdev->dev,
 835                         "Enabling the passthrough mode for %s failed\n",
 836                         QETH_CARD_IFNAME(card));
 837                 return rc;
 838         }
 839 out:
 840         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 841         return 0;
 842 }
 843
 844 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 845 {
 846         QETH_CARD_TEXT(card, 3, "strtipv6");
 847
 848         if (!qeth_is_supported(card, IPA_IPV6)) {
 849                 dev_info(&card->gdev->dev,
 850                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 851                 return 0;
 852         }
 853         return qeth_l3_softsetup_ipv6(card);
 854 }
 855
 856 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 857 {
 858         u32 filter_data = 1;
 859         int rc;
 860
 861         QETH_CARD_TEXT(card, 3, "stbrdcst");
 862         card->info.broadcast_capable = 0;
 863         if (!qeth_is_supported(card, IPA_FILTERING)) {
 864                 dev_info(&card->gdev->dev,
 865                         "Broadcast not supported on %s\n",
 866                         QETH_CARD_IFNAME(card));
 867                 rc = -EOPNOTSUPP;
 868                 goto out;
 869         }
 870         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 871                                           IPA_CMD_ASS_START, NULL);
 872         if (rc) {
 873                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 874                         "%s failed\n", QETH_CARD_IFNAME(card));
 875                 goto out;
 876         }
 877
 878         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 879                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 880         if (rc) {
 881                 dev_warn(&card->gdev->dev,
 882                         "Setting up broadcast filtering for %s failed\n",
 883                         QETH_CARD_IFNAME(card));
 884                 goto out;
 885         }
 886         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 887         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 888         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 889                                           IPA_CMD_ASS_ENABLE, &filter_data);
 890         if (rc) {
 891                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 892                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 893                 goto out;
 894         }
 895         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 896 out:
 897         if (card->info.broadcast_capable)
 898                 card->dev->flags |= IFF_BROADCAST;
 899         else
 900                 card->dev->flags &= ~IFF_BROADCAST;
 901         return rc;
 902 }
 903
 904 static void qeth_l3_start_ipassists(struct qeth_card *card)
 905 {
 906         QETH_CARD_TEXT(card, 3, "strtipas");
 907
 908         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 909         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 910         qeth_l3_start_ipa_vlan(card);           /* go on*/
 911         qeth_l3_start_ipa_multicast(card);              /* go on*/
 912         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 913         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 914 }
 915
 916 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 917                 struct qeth_reply *reply, unsigned long data)
 918 {
 919         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 920
 921         if (cmd->hdr.return_code)
 922                 return -EIO;
 923         if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 924                 return -EADDRNOTAVAIL;
 925
 926         ether_addr_copy(card->dev->dev_addr,
 927                         cmd->data.create_destroy_addr.mac_addr);
 928         return 0;
 929 }
 930
 931 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 932 {
 933         int rc = 0;
 934         struct qeth_cmd_buffer *iob;
 935
 936         QETH_CARD_TEXT(card, 2, "hsrmac");
 937
 938         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 939                                  IPA_DATA_SIZEOF(create_destroy_addr));
 940         if (!iob)
 941                 return -ENOMEM;
 942
 943         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 944                                 NULL);
 945         return rc;
 946 }
 947
 948 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 949                 struct qeth_reply *reply, unsigned long data)
 950 {
 951         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 952         u16 *uid = reply->param;
 953
 954         if (cmd->hdr.return_code == 0) {
 955                 *uid = cmd->data.create_destroy_addr.uid;
 956                 return 0;
 957         }
 958
 959         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 960         return -EIO;
 961 }
 962
 963 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 964 {
 965         struct qeth_cmd_buffer *iob;
 966
 967         QETH_CARD_TEXT(card, 2, "guniqeid");
 968
 969         if (!qeth_is_supported(card, IPA_IPV6))
 970                 goto out;
 971
 972         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 973                                  IPA_DATA_SIZEOF(create_destroy_addr));
 974         if (!iob)
 975                 goto out;
 976
 977         __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 978         qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 979
 980 out:
 981         return uid;
 982 }
 983
 984 static int
 985 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 986                             unsigned long data)
 987 {
 988         struct qeth_ipa_cmd        *cmd;
 989         __u16 rc;
 990
 991         QETH_CARD_TEXT(card, 2, "diastrcb");
 992
 993         cmd = (struct qeth_ipa_cmd *)data;
 994         rc = cmd->hdr.return_code;
 995         if (rc)
 996                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 997         switch (cmd->data.diagass.action) {
 998         case QETH_DIAGS_CMD_TRACE_QUERY:
 999                 break;
1000         case QETH_DIAGS_CMD_TRACE_DISABLE:
1001                 switch (rc) {
1002                 case 0:
1003                 case IPA_RC_INVALID_SUBCMD:
1004                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1005                         dev_info(&card->gdev->dev, "The HiperSockets network "
1006                                 "traffic analyzer is deactivated\n");
1007                         break;
1008                 default:
1009                         break;
1010                 }
1011                 break;
1012         case QETH_DIAGS_CMD_TRACE_ENABLE:
1013                 switch (rc) {
1014                 case 0:
1015                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1016                         dev_info(&card->gdev->dev, "The HiperSockets network "
1017                                 "traffic analyzer is activated\n");
1018                         break;
1019                 case IPA_RC_HARDWARE_AUTH_ERROR:
1020                         dev_warn(&card->gdev->dev, "The device is not "
1021                                 "authorized to run as a HiperSockets network "
1022                                 "traffic analyzer\n");
1023                         break;
1024                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1025                         dev_warn(&card->gdev->dev, "A HiperSockets "
1026                                 "network traffic analyzer is already "
1027                                 "active in the HiperSockets LAN\n");
1028                         break;
1029                 default:
1030                         break;
1031                 }
1032                 break;
1033         default:
1034                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1035                                  cmd->data.diagass.action, CARD_DEVID(card));
1036         }
1037
1038         return rc ? -EIO : 0;
1039 }
1040
1041 static int
1042 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1043 {
1044         struct qeth_cmd_buffer *iob;
1045         struct qeth_ipa_cmd    *cmd;
1046
1047         QETH_CARD_TEXT(card, 2, "diagtrac");
1048
1049         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1050         if (!iob)
1051                 return -ENOMEM;
1052         cmd = __ipa_cmd(iob);
1053         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1054         cmd->data.diagass.action = diags_cmd;
1055         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1056 }
1057
1058 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1059 {
1060         struct qeth_card *card = arg;
1061         struct inet6_dev *in6_dev;
1062         struct in_device *in4_dev;
1063         struct qeth_ipaddr *ipm;
1064         struct qeth_ipaddr tmp;
1065         struct ip_mc_list *im4;
1066         struct ifmcaddr6 *im6;
1067
1068         QETH_CARD_TEXT(card, 4, "addmc");
1069
1070         if (!dev || !(dev->flags & IFF_UP))
1071                 goto out;
1072
1073         in4_dev = __in_dev_get_rtnl(dev);
1074         if (!in4_dev)
1075                 goto walk_ipv6;
1076
1077         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1078         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1079         tmp.is_multicast = 1;
1080
1081         for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1082              im4 = rtnl_dereference(im4->next_rcu)) {
1083                 tmp.u.a4.addr = im4->multiaddr;
1084
1085                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1086                 if (ipm) {
1087                         /* for mcast, by-IP match means full match */
1088                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1089                         continue;
1090                 }
1091
1092                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1093                 if (!ipm)
1094                         continue;
1095
1096                 hash_add(card->ip_mc_htable, &ipm->hnode,
1097                          qeth_l3_ipaddr_hash(ipm));
1098         }
1099
1100 walk_ipv6:
1101         if (!qeth_is_supported(card, IPA_IPV6))
1102                 goto out;
1103
1104         in6_dev = __in6_dev_get(dev);
1105         if (!in6_dev)
1106                 goto out;
1107
1108         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1109         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1110         tmp.is_multicast = 1;
1111
1112         read_lock_bh(&in6_dev->lock);
1113         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1114                 tmp.u.a6.addr = im6->mca_addr;
1115
1116                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1117                 if (ipm) {
1118                         /* for mcast, by-IP match means full match */
1119                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1120                         continue;
1121                 }
1122
1123                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1124                 if (!ipm)
1125                         continue;
1126
1127                 hash_add(card->ip_mc_htable,
1128                                 &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1129
1130         }
1131         read_unlock_bh(&in6_dev->lock);
1132
1133 out:
1134         return 0;
1135 }
1136
1137 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1138                                    __be16 proto, u16 vid)
1139 {
1140         struct qeth_card *card = dev->ml_priv;
1141
1142         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1143         return 0;
1144 }
1145
1146 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1147                                     __be16 proto, u16 vid)
1148 {
1149         struct qeth_card *card = dev->ml_priv;
1150
1151         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1152         return 0;
1153 }
1154
1155 static void qeth_l3_stop_card(struct qeth_card *card)
1156 {
1157         QETH_CARD_TEXT(card, 2, "stopcard");
1158
1159         qeth_set_allowed_threads(card, 0, 1);
1160
1161         cancel_work_sync(&card->rx_mode_work);
1162         qeth_l3_drain_rx_mode_cache(card);
1163
1164         if (card->options.sniffer &&
1165             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1166                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1167
1168         if (card->state == CARD_STATE_SOFTSETUP) {
1169                 qeth_l3_clear_ip_htable(card, 1);
1170                 qeth_clear_ipacmd_list(card);
1171                 qeth_drain_output_queues(card);
1172                 cancel_delayed_work_sync(&card->buffer_reclaim_work);
1173                 card->state = CARD_STATE_DOWN;
1174         }
1175
1176         qeth_qdio_clear_card(card, 0);
1177         qeth_clear_working_pool_list(card);
1178         flush_workqueue(card->event_wq);
1179         qeth_flush_local_addrs(card);
1180         card->info.promisc_mode = 0;
1181 }
1182
1183 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1184 {
1185         bool enable = card->dev->flags & IFF_PROMISC;
1186
1187         if (card->info.promisc_mode == enable)
1188                 return;
1189
1190         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1191                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1192                         qeth_setadp_promisc_mode(card, enable);
1193         } else if (card->options.sniffer &&     /* HiperSockets trace */
1194                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1195                 if (enable) {
1196                         QETH_CARD_TEXT(card, 3, "+promisc");
1197                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1198                 } else {
1199                         QETH_CARD_TEXT(card, 3, "-promisc");
1200                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1201                 }
1202         }
1203 }
1204
1205 static void qeth_l3_rx_mode_work(struct work_struct *work)
1206 {
1207         struct qeth_card *card = container_of(work, struct qeth_card,
1208                                               rx_mode_work);
1209         struct qeth_ipaddr *addr;
1210         struct hlist_node *tmp;
1211         int i, rc;
1212
1213         QETH_CARD_TEXT(card, 3, "setmulti");
1214
1215         if (!card->options.sniffer) {
1216                 rtnl_lock();
1217                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1218                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1219                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1220                 rtnl_unlock();
1221
1222                 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1223                         switch (addr->disp_flag) {
1224                         case QETH_DISP_ADDR_DELETE:
1225                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1226                                 if (!rc || rc == -ENOENT) {
1227                                         hash_del(&addr->hnode);
1228                                         kfree(addr);
1229                                 }
1230                                 break;
1231                         case QETH_DISP_ADDR_ADD:
1232                                 rc = qeth_l3_register_addr_entry(card, addr);
1233                                 if (rc && rc != -ENETDOWN) {
1234                                         hash_del(&addr->hnode);
1235                                         kfree(addr);
1236                                         break;
1237                                 }
1238                                 addr->ref_counter = 1;
1239                                 /* fall through */
1240                         default:
1241                                 /* for next call to set_rx_mode(): */
1242                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1243                         }
1244                 }
1245         }
1246
1247         qeth_l3_set_promisc_mode(card);
1248 }
1249
1250 static int qeth_l3_arp_makerc(u16 rc)
1251 {
1252         switch (rc) {
1253         case IPA_RC_SUCCESS:
1254                 return 0;
1255         case QETH_IPA_ARP_RC_NOTSUPP:
1256         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1257                 return -EOPNOTSUPP;
1258         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1259                 return -EINVAL;
1260         case QETH_IPA_ARP_RC_Q_NO_DATA:
1261                 return -ENOENT;
1262         default:
1263                 return -EIO;
1264         }
1265 }
1266
1267 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1268                               unsigned long data)
1269 {
1270         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1271
1272         qeth_setassparms_cb(card, reply, data);
1273         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1274 }
1275
1276 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1277 {
1278         struct qeth_cmd_buffer *iob;
1279         int rc;
1280
1281         QETH_CARD_TEXT(card, 3, "arpstnoe");
1282
1283         /*
1284          * currently GuestLAN only supports the ARP assist function
1285          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1286          * thus we say EOPNOTSUPP for this ARP function
1287          */
1288         if (IS_VM_NIC(card))
1289                 return -EOPNOTSUPP;
1290         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1291                 return -EOPNOTSUPP;
1292         }
1293
1294         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1295                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1296                                        SETASS_DATA_SIZEOF(flags_32bit),
1297                                        QETH_PROT_IPV4);
1298         if (!iob)
1299                 return -ENOMEM;
1300
1301         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1302         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1303         if (rc)
1304                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1305                                  CARD_DEVID(card), rc);
1306         return rc;
1307 }
1308
1309 static __u32 get_arp_entry_size(struct qeth_card *card,
1310                         struct qeth_arp_query_data *qdata,
1311                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1312 {
1313         __u32 rc;
1314         __u8 is_hsi;
1315
1316         is_hsi = qdata->reply_bits == 5;
1317         if (type->ip == QETHARP_IP_ADDR_V4) {
1318                 QETH_CARD_TEXT(card, 4, "arpev4");
1319                 if (strip_entries) {
1320                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1321                                 sizeof(struct qeth_arp_qi_entry7_short);
1322                 } else {
1323                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1324                                 sizeof(struct qeth_arp_qi_entry7);
1325                 }
1326         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1327                 QETH_CARD_TEXT(card, 4, "arpev6");
1328                 if (strip_entries) {
1329                         rc = is_hsi ?
1330                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1331                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1332                 } else {
1333                         rc = is_hsi ?
1334                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1335                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1336                 }
1337         } else {
1338                 QETH_CARD_TEXT(card, 4, "arpinv");
1339                 rc = 0;
1340         }
1341
1342         return rc;
1343 }
1344
1345 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1346 {
1347         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1348                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1349 }
1350
1351 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1352                 struct qeth_reply *reply, unsigned long data)
1353 {
1354         struct qeth_ipa_cmd *cmd;
1355         struct qeth_arp_query_data *qdata;
1356         struct qeth_arp_query_info *qinfo;
1357         int e;
1358         int entrybytes_done;
1359         int stripped_bytes;
1360         __u8 do_strip_entries;
1361
1362         QETH_CARD_TEXT(card, 3, "arpquecb");
1363
1364         qinfo = (struct qeth_arp_query_info *) reply->param;
1365         cmd = (struct qeth_ipa_cmd *) data;
1366         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1367         if (cmd->hdr.return_code) {
1368                 QETH_CARD_TEXT(card, 4, "arpcberr");
1369                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1370                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1371         }
1372         if (cmd->data.setassparms.hdr.return_code) {
1373                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1374                 QETH_CARD_TEXT(card, 4, "setaperr");
1375                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1376                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1377         }
1378         qdata = &cmd->data.setassparms.data.query_arp;
1379         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1380
1381         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1382         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1383         entrybytes_done = 0;
1384         for (e = 0; e < qdata->no_entries; ++e) {
1385                 char *cur_entry;
1386                 __u32 esize;
1387                 struct qeth_arp_entrytype *etype;
1388
1389                 cur_entry = &qdata->data + entrybytes_done;
1390                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1391                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1392                         QETH_CARD_TEXT(card, 4, "pmis");
1393                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1394                         break;
1395                 }
1396                 esize = get_arp_entry_size(card, qdata, etype,
1397                         do_strip_entries);
1398                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1399                 if (!esize)
1400                         break;
1401
1402                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1403                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1404                         memset(qinfo->udata, 0, 4);
1405                         return -ENOSPC;
1406                 }
1407
1408                 memcpy(qinfo->udata + qinfo->udata_offset,
1409                         &qdata->data + entrybytes_done + stripped_bytes,
1410                         esize);
1411                 entrybytes_done += esize + stripped_bytes;
1412                 qinfo->udata_offset += esize;
1413                 ++qinfo->no_entries;
1414         }
1415         /* check if all replies received ... */
1416         if (cmd->data.setassparms.hdr.seq_no <
1417             cmd->data.setassparms.hdr.number_of_replies)
1418                 return 1;
1419         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1420         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1421         /* keep STRIP_ENTRIES flag so the user program can distinguish
1422          * stripped entries from normal ones */
1423         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1424                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1425         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1426         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1427         return 0;
1428 }
1429
1430 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1431         enum qeth_prot_versions prot,
1432         struct qeth_arp_query_info *qinfo)
1433 {
1434         struct qeth_cmd_buffer *iob;
1435         struct qeth_ipa_cmd *cmd;
1436         int rc;
1437
1438         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1439
1440         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1441                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1442                                        SETASS_DATA_SIZEOF(query_arp), prot);
1443         if (!iob)
1444                 return -ENOMEM;
1445         cmd = __ipa_cmd(iob);
1446         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1447         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1448         if (rc)
1449                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1450                                  CARD_DEVID(card), rc);
1451         return rc;
1452 }
1453
1454 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1455 {
1456         struct qeth_arp_query_info qinfo = {0, };
1457         int rc;
1458
1459         QETH_CARD_TEXT(card, 3, "arpquery");
1460
1461         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1462                                IPA_ARP_PROCESSING)) {
1463                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1464                 rc = -EOPNOTSUPP;
1465                 goto out;
1466         }
1467         /* get size of userspace buffer and mask_bits -> 6 bytes */
1468         if (copy_from_user(&qinfo, udata, 6)) {
1469                 rc = -EFAULT;
1470                 goto out;
1471         }
1472         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1473         if (!qinfo.udata) {
1474                 rc = -ENOMEM;
1475                 goto out;
1476         }
1477         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1478         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1479         if (rc) {
1480                 if (copy_to_user(udata, qinfo.udata, 4))
1481                         rc = -EFAULT;
1482                 goto free_and_out;
1483         }
1484         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1485                 /* fails in case of GuestLAN QDIO mode */
1486                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1487         }
1488         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1489                 QETH_CARD_TEXT(card, 4, "qactf");
1490                 rc = -EFAULT;
1491                 goto free_and_out;
1492         }
1493         QETH_CARD_TEXT(card, 4, "qacts");
1494
1495 free_and_out:
1496         kfree(qinfo.udata);
1497 out:
1498         return rc;
1499 }
1500
1501 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1502                                     struct qeth_arp_cache_entry *entry,
1503                                     enum qeth_arp_process_subcmds arp_cmd)
1504 {
1505         struct qeth_arp_cache_entry *cmd_entry;
1506         struct qeth_cmd_buffer *iob;
1507         int rc;
1508
1509         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1510                 QETH_CARD_TEXT(card, 3, "arpadd");
1511         else
1512                 QETH_CARD_TEXT(card, 3, "arpdel");
1513
1514         /*
1515          * currently GuestLAN only supports the ARP assist function
1516          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1517          * thus we say EOPNOTSUPP for this ARP function
1518          */
1519         if (IS_VM_NIC(card))
1520                 return -EOPNOTSUPP;
1521         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1522                 return -EOPNOTSUPP;
1523         }
1524
1525         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1526                                        SETASS_DATA_SIZEOF(arp_entry),
1527                                        QETH_PROT_IPV4);
1528         if (!iob)
1529                 return -ENOMEM;
1530
1531         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1532         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1533         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1534         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1535         if (rc)
1536                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1537                                  arp_cmd, CARD_DEVID(card), rc);
1538         return rc;
1539 }
1540
1541 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1542 {
1543         struct qeth_cmd_buffer *iob;
1544         int rc;
1545
1546         QETH_CARD_TEXT(card, 3, "arpflush");
1547
1548         /*
1549          * currently GuestLAN only supports the ARP assist function
1550          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1551          * thus we say EOPNOTSUPP for this ARP function
1552         */
1553         if (IS_VM_NIC(card) || IS_IQD(card))
1554                 return -EOPNOTSUPP;
1555         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1556                 return -EOPNOTSUPP;
1557         }
1558
1559         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1560                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1561                                        QETH_PROT_IPV4);
1562         if (!iob)
1563                 return -ENOMEM;
1564
1565         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1566         if (rc)
1567                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1568                                  CARD_DEVID(card), rc);
1569         return rc;
1570 }
1571
1572 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1573 {
1574         struct qeth_card *card = dev->ml_priv;
1575         struct qeth_arp_cache_entry arp_entry;
1576         enum qeth_arp_process_subcmds arp_cmd;
1577         int rc = 0;
1578
1579         switch (cmd) {
1580         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1581                 if (!capable(CAP_NET_ADMIN)) {
1582                         rc = -EPERM;
1583                         break;
1584                 }
1585                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1586                 break;
1587         case SIOC_QETH_ARP_QUERY_INFO:
1588                 if (!capable(CAP_NET_ADMIN)) {
1589                         rc = -EPERM;
1590                         break;
1591                 }
1592                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1593                 break;
1594         case SIOC_QETH_ARP_ADD_ENTRY:
1595         case SIOC_QETH_ARP_REMOVE_ENTRY:
1596                 if (!capable(CAP_NET_ADMIN))
1597                         return -EPERM;
1598                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1599                         return -EFAULT;
1600
1601                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1602                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1603                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1604                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1605         case SIOC_QETH_ARP_FLUSH_CACHE:
1606                 if (!capable(CAP_NET_ADMIN)) {
1607                         rc = -EPERM;
1608                         break;
1609                 }
1610                 rc = qeth_l3_arp_flush_cache(card);
1611                 break;
1612         default:
1613                 rc = -EOPNOTSUPP;
1614         }
1615         return rc;
1616 }
1617
1618 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1619                                      int ipv)
1620 {
1621         struct neighbour *n = NULL;
1622
1623         if (dst)
1624                 n = dst_neigh_lookup_skb(dst, skb);
1625
1626         if (n) {
1627                 int cast_type = n->type;
1628
1629                 neigh_release(n);
1630                 if ((cast_type == RTN_BROADCAST) ||
1631                     (cast_type == RTN_MULTICAST) ||
1632                     (cast_type == RTN_ANYCAST))
1633                         return cast_type;
1634                 return RTN_UNICAST;
1635         }
1636
1637         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1638         switch (ipv) {
1639         case 4:
1640                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1641                         return RTN_BROADCAST;
1642                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1643                                 RTN_MULTICAST : RTN_UNICAST;
1644         case 6:
1645                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1646                                 RTN_MULTICAST : RTN_UNICAST;
1647         default:
1648                 /* ... and MAC address */
1649                 return qeth_get_ether_cast_type(skb);
1650         }
1651 }
1652
1653 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1654 {
1655         int ipv = qeth_get_ip_version(skb);
1656         struct dst_entry *dst;
1657         int cast_type;
1658
1659         rcu_read_lock();
1660         dst = qeth_dst_check_rcu(skb, ipv);
1661         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1662         rcu_read_unlock();
1663
1664         return cast_type;
1665 }
1666
1667 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1668 {
1669         if (cast_type == RTN_MULTICAST)
1670                 return QETH_CAST_MULTICAST;
1671         if (cast_type == RTN_ANYCAST)
1672                 return QETH_CAST_ANYCAST;
1673         if (cast_type == RTN_BROADCAST)
1674                 return QETH_CAST_BROADCAST;
1675         return QETH_CAST_UNICAST;
1676 }
1677
1678 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1679                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1680                                 int ipv, unsigned int data_len)
1681 {
1682         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1683         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1684         struct qeth_card *card = queue->card;
1685         struct dst_entry *dst;
1686         int cast_type;
1687
1688         hdr->hdr.l3.length = data_len;
1689
1690         if (skb_is_gso(skb)) {
1691                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1692         } else {
1693                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1694
1695                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1696                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1697                         l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1698                         memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1699                                iucv_trans_hdr(skb)->destUserID, 8);
1700                         return;
1701                 }
1702
1703                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1704                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1705                         /* some HW requires combined L3+L4 csum offload: */
1706                         if (ipv == 4)
1707                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1708                 }
1709         }
1710
1711         if (ipv == 4 || IS_IQD(card)) {
1712                 /* NETIF_F_HW_VLAN_CTAG_TX */
1713                 if (skb_vlan_tag_present(skb)) {
1714                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1715                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1716                 }
1717         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1718                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1719                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1720         }
1721
1722         rcu_read_lock();
1723         dst = qeth_dst_check_rcu(skb, ipv);
1724
1725         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1726                 cast_type = RTN_UNICAST;
1727         else
1728                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1729         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1730
1731         if (ipv == 4) {
1732                 l3_hdr->next_hop.addr.s6_addr32[3] =
1733                                         qeth_next_hop_v4_rcu(skb, dst);
1734         } else if (ipv == 6) {
1735                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1736
1737                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1738                 if (!IS_IQD(card))
1739                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1740         } else {
1741                 /* OSA only: */
1742                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1743         }
1744         rcu_read_unlock();
1745 }
1746
1747 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1748 {
1749         struct iphdr *iph = ip_hdr(skb);
1750
1751         /* this is safe, IPv6 traffic takes a different path */
1752         if (skb->ip_summed == CHECKSUM_PARTIAL)
1753                 iph->check = 0;
1754         if (skb_is_gso(skb)) {
1755                 iph->tot_len = 0;
1756                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1757                                                     iph->daddr, 0);
1758         }
1759 }
1760
1761 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1762                         struct qeth_qdio_out_q *queue, int ipv)
1763 {
1764         unsigned int hw_hdr_len;
1765         int rc;
1766
1767         /* re-use the L2 header area for the HW header: */
1768         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1769                                        sizeof(struct qeth_hdr);
1770         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1771         if (rc)
1772                 return rc;
1773         skb_pull(skb, ETH_HLEN);
1774
1775         qeth_l3_fixup_headers(skb);
1776         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1777 }
1778
1779 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1780                                            struct net_device *dev)
1781 {
1782         struct qeth_card *card = dev->ml_priv;
1783         u16 txq = skb_get_queue_mapping(skb);
1784         int ipv = qeth_get_ip_version(skb);
1785         struct qeth_qdio_out_q *queue;
1786         int rc;
1787
1788         if (!skb_is_gso(skb))
1789                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1790         if (IS_IQD(card)) {
1791                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1792
1793                 if (card->options.sniffer)
1794                         goto tx_drop;
1795                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1796                     (card->options.cq == QETH_CQ_ENABLED &&
1797                      skb->protocol != htons(ETH_P_AF_IUCV)))
1798                         goto tx_drop;
1799         } else {
1800                 queue = card->qdio.out_qs[txq];
1801         }
1802
1803         if (!(dev->flags & IFF_BROADCAST) &&
1804             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1805                 goto tx_drop;
1806
1807         if (ipv == 4 || IS_IQD(card))
1808                 rc = qeth_l3_xmit(card, skb, queue, ipv);
1809         else
1810                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1811
1812         if (!rc)
1813                 return NETDEV_TX_OK;
1814
1815 tx_drop:
1816         QETH_TXQ_STAT_INC(queue, tx_dropped);
1817         kfree_skb(skb);
1818         return NETDEV_TX_OK;
1819 }
1820
1821 static void qeth_l3_set_rx_mode(struct net_device *dev)
1822 {
1823         struct qeth_card *card = dev->ml_priv;
1824
1825         schedule_work(&card->rx_mode_work);
1826 }
1827
1828 /*
1829  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1830  * NOARP on the netdevice is no option because it also turns off neighbor
1831  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1832  * arp resolution but we want the hard header (packet socket will work
1833  * e.g. tcpdump)
1834  */
1835 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1836 {
1837         n->nud_state = NUD_NOARP;
1838         memcpy(n->ha, "FAKELL", 6);
1839         n->output = n->ops->connected_output;
1840         return 0;
1841 }
1842
1843 static int
1844 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1845 {
1846         if (np->tbl->family == AF_INET)
1847                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1848
1849         return 0;
1850 }
1851
1852 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1853                                                     struct net_device *dev,
1854                                                     netdev_features_t features)
1855 {
1856         if (qeth_get_ip_version(skb) != 4)
1857                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1858         return qeth_features_check(skb, dev, features);
1859 }
1860
1861 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1862                                     struct net_device *sb_dev)
1863 {
1864         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1865                                      sb_dev);
1866 }
1867
1868 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1869                                     struct net_device *sb_dev)
1870 {
1871         struct qeth_card *card = dev->ml_priv;
1872
1873         return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
1874                                  qeth_get_priority_queue(card, skb);
1875 }
1876
1877 static const struct net_device_ops qeth_l3_netdev_ops = {
1878         .ndo_open               = qeth_open,
1879         .ndo_stop               = qeth_stop,
1880         .ndo_get_stats64        = qeth_get_stats64,
1881         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1882         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1883         .ndo_validate_addr      = eth_validate_addr,
1884         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1885         .ndo_do_ioctl           = qeth_do_ioctl,
1886         .ndo_fix_features       = qeth_fix_features,
1887         .ndo_set_features       = qeth_set_features,
1888         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1889         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1890         .ndo_tx_timeout         = qeth_tx_timeout,
1891 };
1892
1893 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1894         .ndo_open               = qeth_open,
1895         .ndo_stop               = qeth_stop,
1896         .ndo_get_stats64        = qeth_get_stats64,
1897         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1898         .ndo_features_check     = qeth_l3_osa_features_check,
1899         .ndo_select_queue       = qeth_l3_osa_select_queue,
1900         .ndo_validate_addr      = eth_validate_addr,
1901         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1902         .ndo_do_ioctl           = qeth_do_ioctl,
1903         .ndo_fix_features       = qeth_fix_features,
1904         .ndo_set_features       = qeth_set_features,
1905         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1906         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1907         .ndo_tx_timeout         = qeth_tx_timeout,
1908         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1909 };
1910
1911 static int qeth_l3_setup_netdev(struct qeth_card *card)
1912 {
1913         struct net_device *dev = card->dev;
1914         unsigned int headroom;
1915         int rc;
1916
1917         rc = qeth_setup_netdev(card);
1918         if (rc)
1919                 return rc;
1920
1921         if (IS_OSD(card) || IS_OSX(card)) {
1922                 if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
1923                     (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
1924                         pr_info("qeth_l3: ignoring TR device\n");
1925                         return -ENODEV;
1926                 }
1927
1928                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1929
1930                 /*IPv6 address autoconfiguration stuff*/
1931                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1932
1933                 if (!IS_VM_NIC(card)) {
1934                         card->dev->features |= NETIF_F_SG;
1935                         card->dev->hw_features |= NETIF_F_TSO |
1936                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1937                         card->dev->vlan_features |= NETIF_F_TSO |
1938                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1939                 }
1940
1941                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1942                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1943                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1944                 }
1945                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1946                         card->dev->hw_features |= NETIF_F_TSO6;
1947                         card->dev->vlan_features |= NETIF_F_TSO6;
1948                 }
1949
1950                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1951                 if (card->dev->hw_features & NETIF_F_TSO6)
1952                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1953                 else if (card->dev->hw_features & NETIF_F_TSO)
1954                         headroom = sizeof(struct qeth_hdr_tso);
1955                 else
1956                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1957         } else if (IS_IQD(card)) {
1958                 card->dev->flags |= IFF_NOARP;
1959                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1960                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1961
1962                 rc = qeth_l3_iqd_read_initial_mac(card);
1963                 if (rc)
1964                         return rc;
1965         } else
1966                 return -ENODEV;
1967
1968         card->dev->needed_headroom = headroom;
1969         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1970                                 NETIF_F_HW_VLAN_CTAG_RX |
1971                                 NETIF_F_HW_VLAN_CTAG_FILTER;
1972
1973         netif_keep_dst(card->dev);
1974         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1975                 netif_set_gso_max_size(card->dev,
1976                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1977
1978         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1979         return register_netdev(card->dev);
1980 }
1981
1982 static const struct device_type qeth_l3_devtype = {
1983         .name = "qeth_layer3",
1984         .groups = qeth_l3_attr_groups,
1985 };
1986
1987 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1988 {
1989         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1990         int rc;
1991
1992         hash_init(card->ip_htable);
1993         mutex_init(&card->ip_lock);
1994         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1995                                                dev_name(&gdev->dev));
1996         if (!card->cmd_wq)
1997                 return -ENOMEM;
1998
1999         if (gdev->dev.type == &qeth_generic_devtype) {
2000                 rc = qeth_l3_create_device_attributes(&gdev->dev);
2001                 if (rc) {
2002                         destroy_workqueue(card->cmd_wq);
2003                         return rc;
2004                 }
2005         }
2006
2007         hash_init(card->ip_mc_htable);
2008         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
2009         return 0;
2010 }
2011
2012 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2013 {
2014         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2015
2016         if (cgdev->dev.type == &qeth_generic_devtype)
2017                 qeth_l3_remove_device_attributes(&cgdev->dev);
2018
2019         qeth_set_allowed_threads(card, 0, 1);
2020         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2021
2022         if (cgdev->state == CCWGROUP_ONLINE)
2023                 qeth_set_offline(card, false);
2024
2025         cancel_work_sync(&card->close_dev_work);
2026         if (card->dev->reg_state == NETREG_REGISTERED)
2027                 unregister_netdev(card->dev);
2028
2029         flush_workqueue(card->cmd_wq);
2030         destroy_workqueue(card->cmd_wq);
2031         qeth_l3_clear_ip_htable(card, 0);
2032         qeth_l3_clear_ipato_list(card);
2033 }
2034
2035 static int qeth_l3_set_online(struct qeth_card *card)
2036 {
2037         struct ccwgroup_device *gdev = card->gdev;
2038         struct net_device *dev = card->dev;
2039         int rc = 0;
2040         bool carrier_ok;
2041
2042         rc = qeth_core_hardsetup_card(card, &carrier_ok);
2043         if (rc) {
2044                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2045                 rc = -ENODEV;
2046                 goto out_remove;
2047         }
2048
2049         qeth_print_status_message(card);
2050
2051         /* softsetup */
2052         QETH_CARD_TEXT(card, 2, "softsetp");
2053
2054         rc = qeth_l3_setadapter_parms(card);
2055         if (rc)
2056                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2057         if (!card->options.sniffer) {
2058                 qeth_l3_start_ipassists(card);
2059
2060                 rc = qeth_l3_setrouting_v4(card);
2061                 if (rc)
2062                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2063                 rc = qeth_l3_setrouting_v6(card);
2064                 if (rc)
2065                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2066         }
2067
2068         card->state = CARD_STATE_SOFTSETUP;
2069
2070         qeth_set_allowed_threads(card, 0xffffffff, 0);
2071         qeth_l3_recover_ip(card);
2072
2073         if (dev->reg_state != NETREG_REGISTERED) {
2074                 rc = qeth_l3_setup_netdev(card);
2075                 if (rc)
2076                         goto out_remove;
2077
2078                 if (carrier_ok)
2079                         netif_carrier_on(dev);
2080         } else {
2081                 rtnl_lock();
2082                 if (carrier_ok)
2083                         netif_carrier_on(dev);
2084                 else
2085                         netif_carrier_off(dev);
2086
2087                 netif_device_attach(dev);
2088                 qeth_enable_hw_features(dev);
2089
2090                 if (card->info.open_when_online) {
2091                         card->info.open_when_online = 0;
2092                         dev_open(dev, NULL);
2093                 }
2094                 rtnl_unlock();
2095         }
2096         qeth_trace_features(card);
2097         /* let user_space know that device is online */
2098         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2099         return 0;
2100 out_remove:
2101         qeth_l3_stop_card(card);
2102         qeth_stop_channel(&card->data);
2103         qeth_stop_channel(&card->write);
2104         qeth_stop_channel(&card->read);
2105         qdio_free(CARD_DDEV(card));
2106         return rc;
2107 }
2108
2109 static void qeth_l3_set_offline(struct qeth_card *card)
2110 {
2111         qeth_l3_stop_card(card);
2112 }
2113
2114 /* Returns zero if the command is successfully "consumed" */
2115 static int qeth_l3_control_event(struct qeth_card *card,
2116                                         struct qeth_ipa_cmd *cmd)
2117 {
2118         return 1;
2119 }
2120
2121 struct qeth_discipline qeth_l3_discipline = {
2122         .devtype = &qeth_l3_devtype,
2123         .setup = qeth_l3_probe_device,
2124         .remove = qeth_l3_remove_device,
2125         .set_online = qeth_l3_set_online,
2126         .set_offline = qeth_l3_set_offline,
2127         .do_ioctl = qeth_l3_do_ioctl,
2128         .control_event_handler = qeth_l3_control_event,
2129 };
2130 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2131
2132 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2133                                    struct qeth_ipaddr *addr,
2134                                    unsigned long event)
2135 {
2136         switch (event) {
2137         case NETDEV_UP:
2138                 qeth_l3_modify_ip(card, addr, true);
2139                 return NOTIFY_OK;
2140         case NETDEV_DOWN:
2141                 qeth_l3_modify_ip(card, addr, false);
2142                 return NOTIFY_OK;
2143         default:
2144                 return NOTIFY_DONE;
2145         }
2146 }
2147
2148 struct qeth_l3_ip_event_work {
2149         struct work_struct work;
2150         struct qeth_card *card;
2151         struct qeth_ipaddr addr;
2152 };
2153
2154 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2155
2156 static void qeth_l3_add_ip_worker(struct work_struct *work)
2157 {
2158         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2159
2160         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2161         kfree(work);
2162 }
2163
2164 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2165 {
2166         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2167
2168         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2169         kfree(work);
2170 }
2171
2172 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2173 {
2174         if (is_vlan_dev(dev))
2175                 dev = vlan_dev_real_dev(dev);
2176         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2177             dev->netdev_ops == &qeth_l3_netdev_ops)
2178                 return (struct qeth_card *) dev->ml_priv;
2179         return NULL;
2180 }
2181
2182 static int qeth_l3_ip_event(struct notifier_block *this,
2183                             unsigned long event, void *ptr)
2184 {
2185
2186         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2187         struct net_device *dev = ifa->ifa_dev->dev;
2188         struct qeth_ipaddr addr;
2189         struct qeth_card *card;
2190
2191         card = qeth_l3_get_card_from_dev(dev);
2192         if (!card)
2193                 return NOTIFY_DONE;
2194         QETH_CARD_TEXT(card, 3, "ipevent");
2195
2196         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2197         addr.u.a4.addr = ifa->ifa_address;
2198         addr.u.a4.mask = ifa->ifa_mask;
2199
2200         return qeth_l3_handle_ip_event(card, &addr, event);
2201 }
2202
2203 static struct notifier_block qeth_l3_ip_notifier = {
2204         qeth_l3_ip_event,
2205         NULL,
2206 };
2207
2208 static int qeth_l3_ip6_event(struct notifier_block *this,
2209                              unsigned long event, void *ptr)
2210 {
2211         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2212         struct net_device *dev = ifa->idev->dev;
2213         struct qeth_l3_ip_event_work *ip_work;
2214         struct qeth_card *card;
2215
2216         if (event != NETDEV_UP && event != NETDEV_DOWN)
2217                 return NOTIFY_DONE;
2218
2219         card = qeth_l3_get_card_from_dev(dev);
2220         if (!card)
2221                 return NOTIFY_DONE;
2222         QETH_CARD_TEXT(card, 3, "ip6event");
2223         if (!qeth_is_supported(card, IPA_IPV6))
2224                 return NOTIFY_DONE;
2225
2226         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2227         if (!ip_work)
2228                 return NOTIFY_DONE;
2229
2230         if (event == NETDEV_UP)
2231                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2232         else
2233                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2234
2235         ip_work->card = card;
2236         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2237                             QETH_PROT_IPV6);
2238         ip_work->addr.u.a6.addr = ifa->addr;
2239         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2240
2241         queue_work(card->cmd_wq, &ip_work->work);
2242         return NOTIFY_OK;
2243 }
2244
2245 static struct notifier_block qeth_l3_ip6_notifier = {
2246         qeth_l3_ip6_event,
2247         NULL,
2248 };
2249
2250 static int qeth_l3_register_notifiers(void)
2251 {
2252         int rc;
2253
2254         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2255         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2256         if (rc)
2257                 return rc;
2258         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2259         if (rc) {
2260                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2261                 return rc;
2262         }
2263         return 0;
2264 }
2265
2266 static void qeth_l3_unregister_notifiers(void)
2267 {
2268         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2269         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2270         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2271 }
2272
2273 static int __init qeth_l3_init(void)
2274 {
2275         pr_info("register layer 3 discipline\n");
2276         return qeth_l3_register_notifiers();
2277 }
2278
2279 static void __exit qeth_l3_exit(void)
2280 {
2281         qeth_l3_unregister_notifiers();
2282         pr_info("unregister layer 3 discipline\n");
2283 }
2284
2285 module_init(qeth_l3_init);
2286 module_exit(qeth_l3_exit);
2287 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2288 MODULE_DESCRIPTION("qeth layer 3 discipline");
2289 MODULE_LICENSE("GPL");