drivers/s390/net/qeth_l3_sys.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007
   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 #include <linux/slab.h>
  11 #include <asm/ebcdic.h>
  12 #include <linux/hashtable.h>
  13 #include <linux/inet.h>
  14 #include "qeth_l3.h"
  15
  16 #define QETH_DEVICE_ATTR(_id, _name, _mode, _show, _store) \
  17 struct device_attribute dev_attr_##_id = __ATTR(_name, _mode, _show, _store)
  18
  19 static int qeth_l3_string_to_ipaddr(const char *buf,
  20                                     enum qeth_prot_versions proto, u8 *addr)
  21 {
  22         const char *end;
  23
  24         if ((proto == QETH_PROT_IPV4 && !in4_pton(buf, -1, addr, -1, &end)) ||
  25             (proto == QETH_PROT_IPV6 && !in6_pton(buf, -1, addr, -1, &end)))
  26                 return -EINVAL;
  27         return 0;
  28 }
  29
  30 static ssize_t qeth_l3_dev_route_show(struct qeth_card *card,
  31                         struct qeth_routing_info *route, char *buf)
  32 {
  33         switch (route->type) {
  34         case PRIMARY_ROUTER:
  35                 return sprintf(buf, "%s\n", "primary router");
  36         case SECONDARY_ROUTER:
  37                 return sprintf(buf, "%s\n", "secondary router");
  38         case MULTICAST_ROUTER:
  39                 if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
  40                         return sprintf(buf, "%s\n", "multicast router+");
  41                 else
  42                         return sprintf(buf, "%s\n", "multicast router");
  43         case PRIMARY_CONNECTOR:
  44                 if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
  45                         return sprintf(buf, "%s\n", "primary connector+");
  46                 else
  47                         return sprintf(buf, "%s\n", "primary connector");
  48         case SECONDARY_CONNECTOR:
  49                 if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
  50                         return sprintf(buf, "%s\n", "secondary connector+");
  51                 else
  52                         return sprintf(buf, "%s\n", "secondary connector");
  53         default:
  54                 return sprintf(buf, "%s\n", "no");
  55         }
  56 }
  57
  58 static ssize_t qeth_l3_dev_route4_show(struct device *dev,
  59                         struct device_attribute *attr, char *buf)
  60 {
  61         struct qeth_card *card = dev_get_drvdata(dev);
  62
  63         if (!card)
  64                 return -EINVAL;
  65
  66         return qeth_l3_dev_route_show(card, &card->options.route4, buf);
  67 }
  68
  69 static ssize_t qeth_l3_dev_route_store(struct qeth_card *card,
  70                 struct qeth_routing_info *route, enum qeth_prot_versions prot,
  71                 const char *buf, size_t count)
  72 {
  73         enum qeth_routing_types old_route_type = route->type;
  74         int rc = 0;
  75
  76         mutex_lock(&card->conf_mutex);
  77         if (sysfs_streq(buf, "no_router")) {
  78                 route->type = NO_ROUTER;
  79         } else if (sysfs_streq(buf, "primary_connector")) {
  80                 route->type = PRIMARY_CONNECTOR;
  81         } else if (sysfs_streq(buf, "secondary_connector")) {
  82                 route->type = SECONDARY_CONNECTOR;
  83         } else if (sysfs_streq(buf, "primary_router")) {
  84                 route->type = PRIMARY_ROUTER;
  85         } else if (sysfs_streq(buf, "secondary_router")) {
  86                 route->type = SECONDARY_ROUTER;
  87         } else if (sysfs_streq(buf, "multicast_router")) {
  88                 route->type = MULTICAST_ROUTER;
  89         } else {
  90                 rc = -EINVAL;
  91                 goto out;
  92         }
  93         if (qeth_card_hw_is_reachable(card) &&
  94             (old_route_type != route->type)) {
  95                 if (prot == QETH_PROT_IPV4)
  96                         rc = qeth_l3_setrouting_v4(card);
  97                 else if (prot == QETH_PROT_IPV6)
  98                         rc = qeth_l3_setrouting_v6(card);
  99         }
 100 out:
 101         if (rc)
 102                 route->type = old_route_type;
 103         mutex_unlock(&card->conf_mutex);
 104         return rc ? rc : count;
 105 }
 106
 107 static ssize_t qeth_l3_dev_route4_store(struct device *dev,
 108                 struct device_attribute *attr, const char *buf, size_t count)
 109 {
 110         struct qeth_card *card = dev_get_drvdata(dev);
 111
 112         if (!card)
 113                 return -EINVAL;
 114
 115         return qeth_l3_dev_route_store(card, &card->options.route4,
 116                                 QETH_PROT_IPV4, buf, count);
 117 }
 118
 119 static DEVICE_ATTR(route4, 0644, qeth_l3_dev_route4_show,
 120                         qeth_l3_dev_route4_store);
 121
 122 static ssize_t qeth_l3_dev_route6_show(struct device *dev,
 123                         struct device_attribute *attr, char *buf)
 124 {
 125         struct qeth_card *card = dev_get_drvdata(dev);
 126
 127         if (!card)
 128                 return -EINVAL;
 129
 130         return qeth_l3_dev_route_show(card, &card->options.route6, buf);
 131 }
 132
 133 static ssize_t qeth_l3_dev_route6_store(struct device *dev,
 134                 struct device_attribute *attr, const char *buf, size_t count)
 135 {
 136         struct qeth_card *card = dev_get_drvdata(dev);
 137
 138         if (!card)
 139                 return -EINVAL;
 140
 141         return qeth_l3_dev_route_store(card, &card->options.route6,
 142                                 QETH_PROT_IPV6, buf, count);
 143 }
 144
 145 static DEVICE_ATTR(route6, 0644, qeth_l3_dev_route6_show,
 146                         qeth_l3_dev_route6_store);
 147
 148 static ssize_t qeth_l3_dev_fake_broadcast_show(struct device *dev,
 149                         struct device_attribute *attr, char *buf)
 150 {
 151         struct qeth_card *card = dev_get_drvdata(dev);
 152
 153         if (!card)
 154                 return -EINVAL;
 155
 156         return sprintf(buf, "%i\n", card->options.fake_broadcast? 1:0);
 157 }
 158
 159 static ssize_t qeth_l3_dev_fake_broadcast_store(struct device *dev,
 160                 struct device_attribute *attr, const char *buf, size_t count)
 161 {
 162         struct qeth_card *card = dev_get_drvdata(dev);
 163         char *tmp;
 164         int i, rc = 0;
 165
 166         if (!card)
 167                 return -EINVAL;
 168
 169         mutex_lock(&card->conf_mutex);
 170         if ((card->state != CARD_STATE_DOWN) &&
 171             (card->state != CARD_STATE_RECOVER)) {
 172                 rc = -EPERM;
 173                 goto out;
 174         }
 175
 176         i = simple_strtoul(buf, &tmp, 16);
 177         if ((i == 0) || (i == 1))
 178                 card->options.fake_broadcast = i;
 179         else
 180                 rc = -EINVAL;
 181 out:
 182         mutex_unlock(&card->conf_mutex);
 183         return rc ? rc : count;
 184 }
 185
 186 static DEVICE_ATTR(fake_broadcast, 0644, qeth_l3_dev_fake_broadcast_show,
 187                    qeth_l3_dev_fake_broadcast_store);
 188
 189 static ssize_t qeth_l3_dev_sniffer_show(struct device *dev,
 190                 struct device_attribute *attr, char *buf)
 191 {
 192         struct qeth_card *card = dev_get_drvdata(dev);
 193
 194         if (!card)
 195                 return -EINVAL;
 196
 197         return sprintf(buf, "%i\n", card->options.sniffer ? 1 : 0);
 198 }
 199
 200 static ssize_t qeth_l3_dev_sniffer_store(struct device *dev,
 201                 struct device_attribute *attr, const char *buf, size_t count)
 202 {
 203         struct qeth_card *card = dev_get_drvdata(dev);
 204         int rc = 0;
 205         unsigned long i;
 206
 207         if (!card)
 208                 return -EINVAL;
 209
 210         if (card->info.type != QETH_CARD_TYPE_IQD)
 211                 return -EPERM;
 212         if (card->options.cq == QETH_CQ_ENABLED)
 213                 return -EPERM;
 214
 215         mutex_lock(&card->conf_mutex);
 216         if ((card->state != CARD_STATE_DOWN) &&
 217             (card->state != CARD_STATE_RECOVER)) {
 218                 rc = -EPERM;
 219                 goto out;
 220         }
 221
 222         rc = kstrtoul(buf, 16, &i);
 223         if (rc) {
 224                 rc = -EINVAL;
 225                 goto out;
 226         }
 227         switch (i) {
 228         case 0:
 229                 card->options.sniffer = i;
 230                 break;
 231         case 1:
 232                 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
 233                 if (card->ssqd.qdioac2 & QETH_SNIFF_AVAIL) {
 234                         card->options.sniffer = i;
 235                         if (card->qdio.init_pool.buf_count !=
 236                                         QETH_IN_BUF_COUNT_MAX)
 237                                 qeth_realloc_buffer_pool(card,
 238                                         QETH_IN_BUF_COUNT_MAX);
 239                 } else
 240                         rc = -EPERM;
 241                 break;
 242         default:
 243                 rc = -EINVAL;
 244         }
 245 out:
 246         mutex_unlock(&card->conf_mutex);
 247         return rc ? rc : count;
 248 }
 249
 250 static DEVICE_ATTR(sniffer, 0644, qeth_l3_dev_sniffer_show,
 251                 qeth_l3_dev_sniffer_store);
 252
 253
 254 static ssize_t qeth_l3_dev_hsuid_show(struct device *dev,
 255                 struct device_attribute *attr, char *buf)
 256 {
 257         struct qeth_card *card = dev_get_drvdata(dev);
 258         char tmp_hsuid[9];
 259
 260         if (!card)
 261                 return -EINVAL;
 262
 263         if (card->info.type != QETH_CARD_TYPE_IQD)
 264                 return -EPERM;
 265
 266         memcpy(tmp_hsuid, card->options.hsuid, sizeof(tmp_hsuid));
 267         EBCASC(tmp_hsuid, 8);
 268         return sprintf(buf, "%s\n", tmp_hsuid);
 269 }
 270
 271 static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
 272                 struct device_attribute *attr, const char *buf, size_t count)
 273 {
 274         struct qeth_card *card = dev_get_drvdata(dev);
 275         char *tmp;
 276         int rc;
 277
 278         if (!card)
 279                 return -EINVAL;
 280
 281         if (card->info.type != QETH_CARD_TYPE_IQD)
 282                 return -EPERM;
 283         if (card->state != CARD_STATE_DOWN &&
 284             card->state != CARD_STATE_RECOVER)
 285                 return -EPERM;
 286         if (card->options.sniffer)
 287                 return -EPERM;
 288         if (card->options.cq == QETH_CQ_NOTAVAILABLE)
 289                 return -EPERM;
 290
 291         tmp = strsep((char **)&buf, "\n");
 292         if (strlen(tmp) > 8)
 293                 return -EINVAL;
 294
 295         if (card->options.hsuid[0])
 296                 /* delete old ip address */
 297                 qeth_l3_modify_hsuid(card, false);
 298
 299         if (strlen(tmp) == 0) {
 300                 /* delete ip address only */
 301                 card->options.hsuid[0] = '\0';
 302                 memcpy(card->dev->perm_addr, card->options.hsuid, 9);
 303                 qeth_configure_cq(card, QETH_CQ_DISABLED);
 304                 return count;
 305         }
 306
 307         if (qeth_configure_cq(card, QETH_CQ_ENABLED))
 308                 return -EPERM;
 309
 310         snprintf(card->options.hsuid, sizeof(card->options.hsuid),
 311                  "%-8s", tmp);
 312         ASCEBC(card->options.hsuid, 8);
 313         memcpy(card->dev->perm_addr, card->options.hsuid, 9);
 314
 315         rc = qeth_l3_modify_hsuid(card, true);
 316
 317         return rc ? rc : count;
 318 }
 319
 320 static DEVICE_ATTR(hsuid, 0644, qeth_l3_dev_hsuid_show,
 321                    qeth_l3_dev_hsuid_store);
 322
 323
 324 static struct attribute *qeth_l3_device_attrs[] = {
 325         &dev_attr_route4.attr,
 326         &dev_attr_route6.attr,
 327         &dev_attr_fake_broadcast.attr,
 328         &dev_attr_sniffer.attr,
 329         &dev_attr_hsuid.attr,
 330         NULL,
 331 };
 332
 333 static const struct attribute_group qeth_l3_device_attr_group = {
 334         .attrs = qeth_l3_device_attrs,
 335 };
 336
 337 static ssize_t qeth_l3_dev_ipato_enable_show(struct device *dev,
 338                         struct device_attribute *attr, char *buf)
 339 {
 340         struct qeth_card *card = dev_get_drvdata(dev);
 341
 342         if (!card)
 343                 return -EINVAL;
 344
 345         return sprintf(buf, "%i\n", card->ipato.enabled? 1:0);
 346 }
 347
 348 static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
 349                 struct device_attribute *attr, const char *buf, size_t count)
 350 {
 351         struct qeth_card *card = dev_get_drvdata(dev);
 352         bool enable;
 353         int rc = 0;
 354
 355         if (!card)
 356                 return -EINVAL;
 357
 358         mutex_lock(&card->conf_mutex);
 359         if ((card->state != CARD_STATE_DOWN) &&
 360             (card->state != CARD_STATE_RECOVER)) {
 361                 rc = -EPERM;
 362                 goto out;
 363         }
 364
 365         if (sysfs_streq(buf, "toggle")) {
 366                 enable = !card->ipato.enabled;
 367         } else if (kstrtobool(buf, &enable)) {
 368                 rc = -EINVAL;
 369                 goto out;
 370         }
 371
 372         if (card->ipato.enabled != enable) {
 373                 card->ipato.enabled = enable;
 374                 spin_lock_bh(&card->ip_lock);
 375                 qeth_l3_update_ipato(card);
 376                 spin_unlock_bh(&card->ip_lock);
 377         }
 378 out:
 379         mutex_unlock(&card->conf_mutex);
 380         return rc ? rc : count;
 381 }
 382
 383 static QETH_DEVICE_ATTR(ipato_enable, enable, 0644,
 384                         qeth_l3_dev_ipato_enable_show,
 385                         qeth_l3_dev_ipato_enable_store);
 386
 387 static ssize_t qeth_l3_dev_ipato_invert4_show(struct device *dev,
 388                                 struct device_attribute *attr, char *buf)
 389 {
 390         struct qeth_card *card = dev_get_drvdata(dev);
 391
 392         if (!card)
 393                 return -EINVAL;
 394
 395         return sprintf(buf, "%i\n", card->ipato.invert4? 1:0);
 396 }
 397
 398 static ssize_t qeth_l3_dev_ipato_invert4_store(struct device *dev,
 399                                 struct device_attribute *attr,
 400                                 const char *buf, size_t count)
 401 {
 402         struct qeth_card *card = dev_get_drvdata(dev);
 403         bool invert;
 404         int rc = 0;
 405
 406         if (!card)
 407                 return -EINVAL;
 408
 409         mutex_lock(&card->conf_mutex);
 410         if (sysfs_streq(buf, "toggle")) {
 411                 invert = !card->ipato.invert4;
 412         } else if (kstrtobool(buf, &invert)) {
 413                 rc = -EINVAL;
 414                 goto out;
 415         }
 416
 417         if (card->ipato.invert4 != invert) {
 418                 card->ipato.invert4 = invert;
 419                 spin_lock_bh(&card->ip_lock);
 420                 qeth_l3_update_ipato(card);
 421                 spin_unlock_bh(&card->ip_lock);
 422         }
 423 out:
 424         mutex_unlock(&card->conf_mutex);
 425         return rc ? rc : count;
 426 }
 427
 428 static QETH_DEVICE_ATTR(ipato_invert4, invert4, 0644,
 429                         qeth_l3_dev_ipato_invert4_show,
 430                         qeth_l3_dev_ipato_invert4_store);
 431
 432 static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
 433                         enum qeth_prot_versions proto)
 434 {
 435         struct qeth_ipato_entry *ipatoe;
 436         char addr_str[40];
 437         int entry_len; /* length of 1 entry string, differs between v4 and v6 */
 438         int i = 0;
 439
 440         entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
 441         /* add strlen for "/<mask>\n" */
 442         entry_len += (proto == QETH_PROT_IPV4)? 5 : 6;
 443         spin_lock_bh(&card->ip_lock);
 444         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 445                 if (ipatoe->proto != proto)
 446                         continue;
 447                 /* String must not be longer than PAGE_SIZE. So we check if
 448                  * string length gets near PAGE_SIZE. Then we can savely display
 449                  * the next IPv6 address (worst case, compared to IPv4) */
 450                 if ((PAGE_SIZE - i) <= entry_len)
 451                         break;
 452                 qeth_l3_ipaddr_to_string(proto, ipatoe->addr, addr_str);
 453                 i += snprintf(buf + i, PAGE_SIZE - i,
 454                               "%s/%i\n", addr_str, ipatoe->mask_bits);
 455         }
 456         spin_unlock_bh(&card->ip_lock);
 457         i += snprintf(buf + i, PAGE_SIZE - i, "\n");
 458
 459         return i;
 460 }
 461
 462 static ssize_t qeth_l3_dev_ipato_add4_show(struct device *dev,
 463                                 struct device_attribute *attr, char *buf)
 464 {
 465         struct qeth_card *card = dev_get_drvdata(dev);
 466
 467         if (!card)
 468                 return -EINVAL;
 469
 470         return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV4);
 471 }
 472
 473 static int qeth_l3_parse_ipatoe(const char *buf, enum qeth_prot_versions proto,
 474                   u8 *addr, int *mask_bits)
 475 {
 476         const char *start, *end;
 477         char *tmp;
 478         char buffer[40] = {0, };
 479
 480         start = buf;
 481         /* get address string */
 482         end = strchr(start, '/');
 483         if (!end || (end - start >= 40)) {
 484                 return -EINVAL;
 485         }
 486         strncpy(buffer, start, end - start);
 487         if (qeth_l3_string_to_ipaddr(buffer, proto, addr)) {
 488                 return -EINVAL;
 489         }
 490         start = end + 1;
 491         *mask_bits = simple_strtoul(start, &tmp, 10);
 492         if (!strlen(start) ||
 493             (tmp == start) ||
 494             (*mask_bits > ((proto == QETH_PROT_IPV4) ? 32 : 128))) {
 495                 return -EINVAL;
 496         }
 497         return 0;
 498 }
 499
 500 static ssize_t qeth_l3_dev_ipato_add_store(const char *buf, size_t count,
 501                          struct qeth_card *card, enum qeth_prot_versions proto)
 502 {
 503         struct qeth_ipato_entry *ipatoe;
 504         u8 addr[16];
 505         int mask_bits;
 506         int rc = 0;
 507
 508         mutex_lock(&card->conf_mutex);
 509         rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
 510         if (rc)
 511                 goto out;
 512
 513         ipatoe = kzalloc(sizeof(struct qeth_ipato_entry), GFP_KERNEL);
 514         if (!ipatoe) {
 515                 rc = -ENOMEM;
 516                 goto out;
 517         }
 518         ipatoe->proto = proto;
 519         memcpy(ipatoe->addr, addr, (proto == QETH_PROT_IPV4)? 4:16);
 520         ipatoe->mask_bits = mask_bits;
 521
 522         rc = qeth_l3_add_ipato_entry(card, ipatoe);
 523         if (rc)
 524                 kfree(ipatoe);
 525 out:
 526         mutex_unlock(&card->conf_mutex);
 527         return rc ? rc : count;
 528 }
 529
 530 static ssize_t qeth_l3_dev_ipato_add4_store(struct device *dev,
 531                 struct device_attribute *attr, const char *buf, size_t count)
 532 {
 533         struct qeth_card *card = dev_get_drvdata(dev);
 534
 535         if (!card)
 536                 return -EINVAL;
 537
 538         return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV4);
 539 }
 540
 541 static QETH_DEVICE_ATTR(ipato_add4, add4, 0644,
 542                         qeth_l3_dev_ipato_add4_show,
 543                         qeth_l3_dev_ipato_add4_store);
 544
 545 static ssize_t qeth_l3_dev_ipato_del_store(const char *buf, size_t count,
 546                          struct qeth_card *card, enum qeth_prot_versions proto)
 547 {
 548         u8 addr[16];
 549         int mask_bits;
 550         int rc = 0;
 551
 552         mutex_lock(&card->conf_mutex);
 553         rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
 554         if (!rc)
 555                 rc = qeth_l3_del_ipato_entry(card, proto, addr, mask_bits);
 556         mutex_unlock(&card->conf_mutex);
 557         return rc ? rc : count;
 558 }
 559
 560 static ssize_t qeth_l3_dev_ipato_del4_store(struct device *dev,
 561                 struct device_attribute *attr, const char *buf, size_t count)
 562 {
 563         struct qeth_card *card = dev_get_drvdata(dev);
 564
 565         if (!card)
 566                 return -EINVAL;
 567
 568         return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV4);
 569 }
 570
 571 static QETH_DEVICE_ATTR(ipato_del4, del4, 0200, NULL,
 572                         qeth_l3_dev_ipato_del4_store);
 573
 574 static ssize_t qeth_l3_dev_ipato_invert6_show(struct device *dev,
 575                 struct device_attribute *attr, char *buf)
 576 {
 577         struct qeth_card *card = dev_get_drvdata(dev);
 578
 579         if (!card)
 580                 return -EINVAL;
 581
 582         return sprintf(buf, "%i\n", card->ipato.invert6? 1:0);
 583 }
 584
 585 static ssize_t qeth_l3_dev_ipato_invert6_store(struct device *dev,
 586                 struct device_attribute *attr, const char *buf, size_t count)
 587 {
 588         struct qeth_card *card = dev_get_drvdata(dev);
 589         bool invert;
 590         int rc = 0;
 591
 592         if (!card)
 593                 return -EINVAL;
 594
 595         mutex_lock(&card->conf_mutex);
 596         if (sysfs_streq(buf, "toggle")) {
 597                 invert = !card->ipato.invert6;
 598         } else if (kstrtobool(buf, &invert)) {
 599                 rc = -EINVAL;
 600                 goto out;
 601         }
 602
 603         if (card->ipato.invert6 != invert) {
 604                 card->ipato.invert6 = invert;
 605                 spin_lock_bh(&card->ip_lock);
 606                 qeth_l3_update_ipato(card);
 607                 spin_unlock_bh(&card->ip_lock);
 608         }
 609 out:
 610         mutex_unlock(&card->conf_mutex);
 611         return rc ? rc : count;
 612 }
 613
 614 static QETH_DEVICE_ATTR(ipato_invert6, invert6, 0644,
 615                         qeth_l3_dev_ipato_invert6_show,
 616                         qeth_l3_dev_ipato_invert6_store);
 617
 618
 619 static ssize_t qeth_l3_dev_ipato_add6_show(struct device *dev,
 620                                 struct device_attribute *attr, char *buf)
 621 {
 622         struct qeth_card *card = dev_get_drvdata(dev);
 623
 624         if (!card)
 625                 return -EINVAL;
 626
 627         return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV6);
 628 }
 629
 630 static ssize_t qeth_l3_dev_ipato_add6_store(struct device *dev,
 631                 struct device_attribute *attr, const char *buf, size_t count)
 632 {
 633         struct qeth_card *card = dev_get_drvdata(dev);
 634
 635         if (!card)
 636                 return -EINVAL;
 637
 638         return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV6);
 639 }
 640
 641 static QETH_DEVICE_ATTR(ipato_add6, add6, 0644,
 642                         qeth_l3_dev_ipato_add6_show,
 643                         qeth_l3_dev_ipato_add6_store);
 644
 645 static ssize_t qeth_l3_dev_ipato_del6_store(struct device *dev,
 646                 struct device_attribute *attr, const char *buf, size_t count)
 647 {
 648         struct qeth_card *card = dev_get_drvdata(dev);
 649
 650         if (!card)
 651                 return -EINVAL;
 652
 653         return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV6);
 654 }
 655
 656 static QETH_DEVICE_ATTR(ipato_del6, del6, 0200, NULL,
 657                         qeth_l3_dev_ipato_del6_store);
 658
 659 static struct attribute *qeth_ipato_device_attrs[] = {
 660         &dev_attr_ipato_enable.attr,
 661         &dev_attr_ipato_invert4.attr,
 662         &dev_attr_ipato_add4.attr,
 663         &dev_attr_ipato_del4.attr,
 664         &dev_attr_ipato_invert6.attr,
 665         &dev_attr_ipato_add6.attr,
 666         &dev_attr_ipato_del6.attr,
 667         NULL,
 668 };
 669
 670 static const struct attribute_group qeth_device_ipato_group = {
 671         .name = "ipa_takeover",
 672         .attrs = qeth_ipato_device_attrs,
 673 };
 674
 675 static ssize_t qeth_l3_dev_ip_add_show(struct device *dev, char *buf,
 676                                        enum qeth_prot_versions proto,
 677                                        enum qeth_ip_types type)
 678 {
 679         struct qeth_card *card = dev_get_drvdata(dev);
 680         struct qeth_ipaddr *ipaddr;
 681         char addr_str[40];
 682         int str_len = 0;
 683         int entry_len; /* length of 1 entry string, differs between v4 and v6 */
 684         int i;
 685
 686         if (!card)
 687                 return -EINVAL;
 688
 689         entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
 690         entry_len += 2; /* \n + terminator */
 691         spin_lock_bh(&card->ip_lock);
 692         hash_for_each(card->ip_htable, i, ipaddr, hnode) {
 693                 if (ipaddr->proto != proto || ipaddr->type != type)
 694                         continue;
 695                 /* String must not be longer than PAGE_SIZE. So we check if
 696                  * string length gets near PAGE_SIZE. Then we can savely display
 697                  * the next IPv6 address (worst case, compared to IPv4) */
 698                 if ((PAGE_SIZE - str_len) <= entry_len)
 699                         break;
 700                 qeth_l3_ipaddr_to_string(proto, (const u8 *)&ipaddr->u,
 701                         addr_str);
 702                 str_len += snprintf(buf + str_len, PAGE_SIZE - str_len, "%s\n",
 703                                     addr_str);
 704         }
 705         spin_unlock_bh(&card->ip_lock);
 706         str_len += snprintf(buf + str_len, PAGE_SIZE - str_len, "\n");
 707
 708         return str_len;
 709 }
 710
 711 static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,
 712                                           struct device_attribute *attr,
 713                                           char *buf)
 714 {
 715         return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
 716                                        QETH_IP_TYPE_VIPA);
 717 }
 718
 719 static int qeth_l3_parse_vipae(const char *buf, enum qeth_prot_versions proto,
 720                  u8 *addr)
 721 {
 722         if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
 723                 return -EINVAL;
 724         }
 725         return 0;
 726 }
 727
 728 static ssize_t qeth_l3_dev_vipa_add_store(const char *buf, size_t count,
 729                         struct qeth_card *card, enum qeth_prot_versions proto)
 730 {
 731         u8 addr[16] = {0, };
 732         int rc;
 733
 734         mutex_lock(&card->conf_mutex);
 735         rc = qeth_l3_parse_vipae(buf, proto, addr);
 736         if (!rc)
 737                 rc = qeth_l3_modify_rxip_vipa(card, true, addr,
 738                                               QETH_IP_TYPE_VIPA, proto);
 739         mutex_unlock(&card->conf_mutex);
 740         return rc ? rc : count;
 741 }
 742
 743 static ssize_t qeth_l3_dev_vipa_add4_store(struct device *dev,
 744                 struct device_attribute *attr, const char *buf, size_t count)
 745 {
 746         struct qeth_card *card = dev_get_drvdata(dev);
 747
 748         if (!card)
 749                 return -EINVAL;
 750
 751         return qeth_l3_dev_vipa_add_store(buf, count, card, QETH_PROT_IPV4);
 752 }
 753
 754 static QETH_DEVICE_ATTR(vipa_add4, add4, 0644,
 755                         qeth_l3_dev_vipa_add4_show,
 756                         qeth_l3_dev_vipa_add4_store);
 757
 758 static ssize_t qeth_l3_dev_vipa_del_store(const char *buf, size_t count,
 759                          struct qeth_card *card, enum qeth_prot_versions proto)
 760 {
 761         u8 addr[16];
 762         int rc;
 763
 764         mutex_lock(&card->conf_mutex);
 765         rc = qeth_l3_parse_vipae(buf, proto, addr);
 766         if (!rc)
 767                 rc = qeth_l3_modify_rxip_vipa(card, false, addr,
 768                                               QETH_IP_TYPE_VIPA, proto);
 769         mutex_unlock(&card->conf_mutex);
 770         return rc ? rc : count;
 771 }
 772
 773 static ssize_t qeth_l3_dev_vipa_del4_store(struct device *dev,
 774                 struct device_attribute *attr, const char *buf, size_t count)
 775 {
 776         struct qeth_card *card = dev_get_drvdata(dev);
 777
 778         if (!card)
 779                 return -EINVAL;
 780
 781         return qeth_l3_dev_vipa_del_store(buf, count, card, QETH_PROT_IPV4);
 782 }
 783
 784 static QETH_DEVICE_ATTR(vipa_del4, del4, 0200, NULL,
 785                         qeth_l3_dev_vipa_del4_store);
 786
 787 static ssize_t qeth_l3_dev_vipa_add6_show(struct device *dev,
 788                                           struct device_attribute *attr,
 789                                           char *buf)
 790 {
 791         return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
 792                                        QETH_IP_TYPE_VIPA);
 793 }
 794
 795 static ssize_t qeth_l3_dev_vipa_add6_store(struct device *dev,
 796                 struct device_attribute *attr, const char *buf, size_t count)
 797 {
 798         struct qeth_card *card = dev_get_drvdata(dev);
 799
 800         if (!card)
 801                 return -EINVAL;
 802
 803         return qeth_l3_dev_vipa_add_store(buf, count, card, QETH_PROT_IPV6);
 804 }
 805
 806 static QETH_DEVICE_ATTR(vipa_add6, add6, 0644,
 807                         qeth_l3_dev_vipa_add6_show,
 808                         qeth_l3_dev_vipa_add6_store);
 809
 810 static ssize_t qeth_l3_dev_vipa_del6_store(struct device *dev,
 811                 struct device_attribute *attr, const char *buf, size_t count)
 812 {
 813         struct qeth_card *card = dev_get_drvdata(dev);
 814
 815         if (!card)
 816                 return -EINVAL;
 817
 818         return qeth_l3_dev_vipa_del_store(buf, count, card, QETH_PROT_IPV6);
 819 }
 820
 821 static QETH_DEVICE_ATTR(vipa_del6, del6, 0200, NULL,
 822                         qeth_l3_dev_vipa_del6_store);
 823
 824 static struct attribute *qeth_vipa_device_attrs[] = {
 825         &dev_attr_vipa_add4.attr,
 826         &dev_attr_vipa_del4.attr,
 827         &dev_attr_vipa_add6.attr,
 828         &dev_attr_vipa_del6.attr,
 829         NULL,
 830 };
 831
 832 static const struct attribute_group qeth_device_vipa_group = {
 833         .name = "vipa",
 834         .attrs = qeth_vipa_device_attrs,
 835 };
 836
 837 static ssize_t qeth_l3_dev_rxip_add4_show(struct device *dev,
 838                                           struct device_attribute *attr,
 839                                           char *buf)
 840 {
 841         return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
 842                                        QETH_IP_TYPE_RXIP);
 843 }
 844
 845 static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
 846                  u8 *addr)
 847 {
 848         __be32 ipv4_addr;
 849         struct in6_addr ipv6_addr;
 850
 851         if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
 852                 return -EINVAL;
 853         }
 854         if (proto == QETH_PROT_IPV4) {
 855                 memcpy(&ipv4_addr, addr, sizeof(ipv4_addr));
 856                 if (ipv4_is_multicast(ipv4_addr)) {
 857                         QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
 858                         return -EINVAL;
 859                 }
 860         } else if (proto == QETH_PROT_IPV6) {
 861                 memcpy(&ipv6_addr, addr, sizeof(ipv6_addr));
 862                 if (ipv6_addr_is_multicast(&ipv6_addr)) {
 863                         QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
 864                         return -EINVAL;
 865                 }
 866         }
 867
 868         return 0;
 869 }
 870
 871 static ssize_t qeth_l3_dev_rxip_add_store(const char *buf, size_t count,
 872                         struct qeth_card *card, enum qeth_prot_versions proto)
 873 {
 874         u8 addr[16] = {0, };
 875         int rc;
 876
 877         mutex_lock(&card->conf_mutex);
 878         rc = qeth_l3_parse_rxipe(buf, proto, addr);
 879         if (!rc)
 880                 rc = qeth_l3_modify_rxip_vipa(card, true, addr,
 881                                               QETH_IP_TYPE_RXIP, proto);
 882         mutex_unlock(&card->conf_mutex);
 883         return rc ? rc : count;
 884 }
 885
 886 static ssize_t qeth_l3_dev_rxip_add4_store(struct device *dev,
 887                 struct device_attribute *attr, const char *buf, size_t count)
 888 {
 889         struct qeth_card *card = dev_get_drvdata(dev);
 890
 891         if (!card)
 892                 return -EINVAL;
 893
 894         return qeth_l3_dev_rxip_add_store(buf, count, card, QETH_PROT_IPV4);
 895 }
 896
 897 static QETH_DEVICE_ATTR(rxip_add4, add4, 0644,
 898                         qeth_l3_dev_rxip_add4_show,
 899                         qeth_l3_dev_rxip_add4_store);
 900
 901 static ssize_t qeth_l3_dev_rxip_del_store(const char *buf, size_t count,
 902                         struct qeth_card *card, enum qeth_prot_versions proto)
 903 {
 904         u8 addr[16];
 905         int rc;
 906
 907         mutex_lock(&card->conf_mutex);
 908         rc = qeth_l3_parse_rxipe(buf, proto, addr);
 909         if (!rc)
 910                 rc = qeth_l3_modify_rxip_vipa(card, false, addr,
 911                                               QETH_IP_TYPE_RXIP, proto);
 912         mutex_unlock(&card->conf_mutex);
 913         return rc ? rc : count;
 914 }
 915
 916 static ssize_t qeth_l3_dev_rxip_del4_store(struct device *dev,
 917                 struct device_attribute *attr, const char *buf, size_t count)
 918 {
 919         struct qeth_card *card = dev_get_drvdata(dev);
 920
 921         if (!card)
 922                 return -EINVAL;
 923
 924         return qeth_l3_dev_rxip_del_store(buf, count, card, QETH_PROT_IPV4);
 925 }
 926
 927 static QETH_DEVICE_ATTR(rxip_del4, del4, 0200, NULL,
 928                         qeth_l3_dev_rxip_del4_store);
 929
 930 static ssize_t qeth_l3_dev_rxip_add6_show(struct device *dev,
 931                                           struct device_attribute *attr,
 932                                           char *buf)
 933 {
 934         return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
 935                                        QETH_IP_TYPE_RXIP);
 936 }
 937
 938 static ssize_t qeth_l3_dev_rxip_add6_store(struct device *dev,
 939                 struct device_attribute *attr, const char *buf, size_t count)
 940 {
 941         struct qeth_card *card = dev_get_drvdata(dev);
 942
 943         if (!card)
 944                 return -EINVAL;
 945
 946         return qeth_l3_dev_rxip_add_store(buf, count, card, QETH_PROT_IPV6);
 947 }
 948
 949 static QETH_DEVICE_ATTR(rxip_add6, add6, 0644,
 950                         qeth_l3_dev_rxip_add6_show,
 951                         qeth_l3_dev_rxip_add6_store);
 952
 953 static ssize_t qeth_l3_dev_rxip_del6_store(struct device *dev,
 954                 struct device_attribute *attr, const char *buf, size_t count)
 955 {
 956         struct qeth_card *card = dev_get_drvdata(dev);
 957
 958         if (!card)
 959                 return -EINVAL;
 960
 961         return qeth_l3_dev_rxip_del_store(buf, count, card, QETH_PROT_IPV6);
 962 }
 963
 964 static QETH_DEVICE_ATTR(rxip_del6, del6, 0200, NULL,
 965                         qeth_l3_dev_rxip_del6_store);
 966
 967 static struct attribute *qeth_rxip_device_attrs[] = {
 968         &dev_attr_rxip_add4.attr,
 969         &dev_attr_rxip_del4.attr,
 970         &dev_attr_rxip_add6.attr,
 971         &dev_attr_rxip_del6.attr,
 972         NULL,
 973 };
 974
 975 static const struct attribute_group qeth_device_rxip_group = {
 976         .name = "rxip",
 977         .attrs = qeth_rxip_device_attrs,
 978 };
 979
 980 static const struct attribute_group *qeth_l3_only_attr_groups[] = {
 981         &qeth_l3_device_attr_group,
 982         &qeth_device_ipato_group,
 983         &qeth_device_vipa_group,
 984         &qeth_device_rxip_group,
 985         NULL,
 986 };
 987
 988 int qeth_l3_create_device_attributes(struct device *dev)
 989 {
 990         return sysfs_create_groups(&dev->kobj, qeth_l3_only_attr_groups);
 991 }
 992
 993 void qeth_l3_remove_device_attributes(struct device *dev)
 994 {
 995         sysfs_remove_groups(&dev->kobj, qeth_l3_only_attr_groups);
 996 }
 997
 998 const struct attribute_group *qeth_l3_attr_groups[] = {
 999         &qeth_device_attr_group,
1000         &qeth_device_blkt_group,
1001         /* l3 specific, see qeth_l3_only_attr_groups: */
1002         &qeth_l3_device_attr_group,
1003         &qeth_device_ipato_group,
1004         &qeth_device_vipa_group,
1005         &qeth_device_rxip_group,
1006         NULL,
1007 };