drivers/s390/net/qeth_l3_main.c

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