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[mirror_ubuntu-hirsute-kernel.git] / 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
41 static int qeth_l3_set_offline(struct ccwgroup_device *);
42 static int qeth_l3_register_addr_entry(struct qeth_card *,
43 struct qeth_ipaddr *);
44 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
45 struct qeth_ipaddr *);
46
47 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
48 char *buf)
49 {
50 if (proto == QETH_PROT_IPV4)
51 return sprintf(buf, "%pI4", addr);
52 else
53 return sprintf(buf, "%pI6", addr);
54 }
55
56 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
57 struct qeth_ipaddr *query)
58 {
59 u32 key = qeth_l3_ipaddr_hash(query);
60 struct qeth_ipaddr *addr;
61
62 if (query->is_multicast) {
63 hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
64 if (qeth_l3_addr_match_ip(addr, query))
65 return addr;
66 } else {
67 hash_for_each_possible(card->ip_htable, addr, hnode, key)
68 if (qeth_l3_addr_match_ip(addr, query))
69 return addr;
70 }
71 return NULL;
72 }
73
74 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
75 {
76 int i, j;
77 u8 octet;
78
79 for (i = 0; i < len; ++i) {
80 octet = addr[i];
81 for (j = 7; j >= 0; --j) {
82 bits[i*8 + j] = octet & 1;
83 octet >>= 1;
84 }
85 }
86 }
87
88 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
89 struct qeth_ipaddr *addr)
90 {
91 struct qeth_ipato_entry *ipatoe;
92 u8 addr_bits[128] = {0, };
93 u8 ipatoe_bits[128] = {0, };
94 int rc = 0;
95
96 if (!card->ipato.enabled)
97 return false;
98 if (addr->type != QETH_IP_TYPE_NORMAL)
99 return false;
100
101 qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
102 (addr->proto == QETH_PROT_IPV4)? 4:16);
103 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
104 if (addr->proto != ipatoe->proto)
105 continue;
106 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
107 (ipatoe->proto == QETH_PROT_IPV4) ?
108 4 : 16);
109 if (addr->proto == QETH_PROT_IPV4)
110 rc = !memcmp(addr_bits, ipatoe_bits,
111 min(32, ipatoe->mask_bits));
112 else
113 rc = !memcmp(addr_bits, ipatoe_bits,
114 min(128, ipatoe->mask_bits));
115 if (rc)
116 break;
117 }
118 /* invert? */
119 if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
120 rc = !rc;
121 else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
122 rc = !rc;
123
124 return rc;
125 }
126
127 static int qeth_l3_delete_ip(struct qeth_card *card,
128 struct qeth_ipaddr *tmp_addr)
129 {
130 int rc = 0;
131 struct qeth_ipaddr *addr;
132
133 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
134 QETH_CARD_TEXT(card, 2, "delrxip");
135 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
136 QETH_CARD_TEXT(card, 2, "delvipa");
137 else
138 QETH_CARD_TEXT(card, 2, "delip");
139
140 if (tmp_addr->proto == QETH_PROT_IPV4)
141 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
142 else {
143 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
144 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
145 }
146
147 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
148 if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
149 return -ENOENT;
150
151 addr->ref_counter--;
152 if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
153 return rc;
154
155 if (qeth_card_hw_is_reachable(card))
156 rc = qeth_l3_deregister_addr_entry(card, addr);
157
158 hash_del(&addr->hnode);
159 kfree(addr);
160
161 return rc;
162 }
163
164 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
165 {
166 int rc = 0;
167 struct qeth_ipaddr *addr;
168 char buf[40];
169
170 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
171 QETH_CARD_TEXT(card, 2, "addrxip");
172 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
173 QETH_CARD_TEXT(card, 2, "addvipa");
174 else
175 QETH_CARD_TEXT(card, 2, "addip");
176
177 if (tmp_addr->proto == QETH_PROT_IPV4)
178 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
179 else {
180 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
181 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
182 }
183
184 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
185 if (addr) {
186 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
187 return -EADDRINUSE;
188 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
189 addr->ref_counter++;
190 return 0;
191 }
192 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
193 buf);
194 dev_warn(&card->gdev->dev,
195 "Registering IP address %s failed\n", buf);
196 return -EADDRINUSE;
197 } else {
198 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
199 if (!addr)
200 return -ENOMEM;
201
202 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
203 QETH_CARD_TEXT(card, 2, "tkovaddr");
204 addr->ipato = 1;
205 }
206 hash_add(card->ip_htable, &addr->hnode,
207 qeth_l3_ipaddr_hash(addr));
208
209 if (!qeth_card_hw_is_reachable(card)) {
210 addr->disp_flag = QETH_DISP_ADDR_ADD;
211 return 0;
212 }
213
214 rc = qeth_l3_register_addr_entry(card, addr);
215
216 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
217 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
218 } else {
219 hash_del(&addr->hnode);
220 kfree(addr);
221 }
222 }
223 return rc;
224 }
225
226 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
227 bool add)
228 {
229 int rc;
230
231 mutex_lock(&card->ip_lock);
232 rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
233 mutex_unlock(&card->ip_lock);
234
235 return rc;
236 }
237
238 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
239 {
240 struct qeth_ipaddr *addr;
241 struct hlist_node *tmp;
242 int i;
243
244 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
245 hash_del(&addr->hnode);
246 kfree(addr);
247 }
248 }
249
250 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
251 {
252 struct qeth_ipaddr *addr;
253 struct hlist_node *tmp;
254 int i;
255
256 QETH_CARD_TEXT(card, 4, "clearip");
257
258 mutex_lock(&card->ip_lock);
259
260 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
261 if (!recover) {
262 hash_del(&addr->hnode);
263 kfree(addr);
264 continue;
265 }
266 addr->disp_flag = QETH_DISP_ADDR_ADD;
267 }
268
269 mutex_unlock(&card->ip_lock);
270 }
271
272 static void qeth_l3_recover_ip(struct qeth_card *card)
273 {
274 struct qeth_ipaddr *addr;
275 struct hlist_node *tmp;
276 int i;
277 int rc;
278
279 QETH_CARD_TEXT(card, 4, "recovrip");
280
281 mutex_lock(&card->ip_lock);
282
283 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
284 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
285 rc = qeth_l3_register_addr_entry(card, addr);
286
287 if (!rc) {
288 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
289 } else {
290 hash_del(&addr->hnode);
291 kfree(addr);
292 }
293 }
294 }
295
296 mutex_unlock(&card->ip_lock);
297 }
298
299 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
300 unsigned long data)
301 {
302 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
303
304 switch (cmd->hdr.return_code) {
305 case IPA_RC_SUCCESS:
306 return 0;
307 case IPA_RC_DUPLICATE_IP_ADDRESS:
308 return -EADDRINUSE;
309 case IPA_RC_MC_ADDR_NOT_FOUND:
310 return -ENOENT;
311 case IPA_RC_LAN_OFFLINE:
312 return -ENETDOWN;
313 default:
314 return -EIO;
315 }
316 }
317
318 static int qeth_l3_send_setdelmc(struct qeth_card *card,
319 struct qeth_ipaddr *addr, int ipacmd)
320 {
321 struct qeth_cmd_buffer *iob;
322 struct qeth_ipa_cmd *cmd;
323
324 QETH_CARD_TEXT(card, 4, "setdelmc");
325
326 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
327 IPA_DATA_SIZEOF(setdelipm));
328 if (!iob)
329 return -ENOMEM;
330 cmd = __ipa_cmd(iob);
331 if (addr->proto == QETH_PROT_IPV6) {
332 cmd->data.setdelipm.ip = addr->u.a6.addr;
333 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
334 } else {
335 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
336 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
337 }
338
339 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
340 }
341
342 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
343 {
344 unsigned int i = 0;
345
346 while (len && i < 4) {
347 int mask_len = min_t(int, len, 32);
348
349 prefix->s6_addr32[i] = inet_make_mask(mask_len);
350 len -= mask_len;
351 i++;
352 }
353 }
354
355 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
356 {
357 switch (addr->type) {
358 case QETH_IP_TYPE_RXIP:
359 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
360 case QETH_IP_TYPE_VIPA:
361 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
362 QETH_IPA_DELIP_VIPA_FLAG;
363 default:
364 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
365 }
366 }
367
368 static int qeth_l3_send_setdelip(struct qeth_card *card,
369 struct qeth_ipaddr *addr,
370 enum qeth_ipa_cmds ipacmd)
371 {
372 struct qeth_cmd_buffer *iob;
373 struct qeth_ipa_cmd *cmd;
374 u32 flags;
375
376 QETH_CARD_TEXT(card, 4, "setdelip");
377
378 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
379 IPA_DATA_SIZEOF(setdelip6));
380 if (!iob)
381 return -ENOMEM;
382 cmd = __ipa_cmd(iob);
383
384 flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
385 QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
386
387 if (addr->proto == QETH_PROT_IPV6) {
388 cmd->data.setdelip6.addr = addr->u.a6.addr;
389 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
390 addr->u.a6.pfxlen);
391 cmd->data.setdelip6.flags = flags;
392 } else {
393 cmd->data.setdelip4.addr = addr->u.a4.addr;
394 cmd->data.setdelip4.mask = addr->u.a4.mask;
395 cmd->data.setdelip4.flags = flags;
396 }
397
398 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
399 }
400
401 static int qeth_l3_send_setrouting(struct qeth_card *card,
402 enum qeth_routing_types type, enum qeth_prot_versions prot)
403 {
404 int rc;
405 struct qeth_ipa_cmd *cmd;
406 struct qeth_cmd_buffer *iob;
407
408 QETH_CARD_TEXT(card, 4, "setroutg");
409 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
410 IPA_DATA_SIZEOF(setrtg));
411 if (!iob)
412 return -ENOMEM;
413 cmd = __ipa_cmd(iob);
414 cmd->data.setrtg.type = (type);
415 rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
416
417 return rc;
418 }
419
420 static int qeth_l3_correct_routing_type(struct qeth_card *card,
421 enum qeth_routing_types *type, enum qeth_prot_versions prot)
422 {
423 if (IS_IQD(card)) {
424 switch (*type) {
425 case NO_ROUTER:
426 case PRIMARY_CONNECTOR:
427 case SECONDARY_CONNECTOR:
428 case MULTICAST_ROUTER:
429 return 0;
430 default:
431 goto out_inval;
432 }
433 } else {
434 switch (*type) {
435 case NO_ROUTER:
436 case PRIMARY_ROUTER:
437 case SECONDARY_ROUTER:
438 return 0;
439 case MULTICAST_ROUTER:
440 if (qeth_is_ipafunc_supported(card, prot,
441 IPA_OSA_MC_ROUTER))
442 return 0;
443 default:
444 goto out_inval;
445 }
446 }
447 out_inval:
448 *type = NO_ROUTER;
449 return -EINVAL;
450 }
451
452 int qeth_l3_setrouting_v4(struct qeth_card *card)
453 {
454 int rc;
455
456 QETH_CARD_TEXT(card, 3, "setrtg4");
457
458 rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
459 QETH_PROT_IPV4);
460 if (rc)
461 return rc;
462
463 rc = qeth_l3_send_setrouting(card, card->options.route4.type,
464 QETH_PROT_IPV4);
465 if (rc) {
466 card->options.route4.type = NO_ROUTER;
467 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
468 rc, CARD_DEVID(card));
469 }
470 return rc;
471 }
472
473 int qeth_l3_setrouting_v6(struct qeth_card *card)
474 {
475 int rc = 0;
476
477 QETH_CARD_TEXT(card, 3, "setrtg6");
478
479 if (!qeth_is_supported(card, IPA_IPV6))
480 return 0;
481 rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
482 QETH_PROT_IPV6);
483 if (rc)
484 return rc;
485
486 rc = qeth_l3_send_setrouting(card, card->options.route6.type,
487 QETH_PROT_IPV6);
488 if (rc) {
489 card->options.route6.type = NO_ROUTER;
490 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
491 rc, CARD_DEVID(card));
492 }
493 return rc;
494 }
495
496 /*
497 * IP address takeover related functions
498 */
499
500 /**
501 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
502 *
503 * Caller must hold ip_lock.
504 */
505 void qeth_l3_update_ipato(struct qeth_card *card)
506 {
507 struct qeth_ipaddr *addr;
508 unsigned int i;
509
510 hash_for_each(card->ip_htable, i, addr, hnode) {
511 if (addr->type != QETH_IP_TYPE_NORMAL)
512 continue;
513 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
514 }
515 }
516
517 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
518 {
519 struct qeth_ipato_entry *ipatoe, *tmp;
520
521 mutex_lock(&card->ip_lock);
522
523 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
524 list_del(&ipatoe->entry);
525 kfree(ipatoe);
526 }
527
528 qeth_l3_update_ipato(card);
529 mutex_unlock(&card->ip_lock);
530 }
531
532 int qeth_l3_add_ipato_entry(struct qeth_card *card,
533 struct qeth_ipato_entry *new)
534 {
535 struct qeth_ipato_entry *ipatoe;
536 int rc = 0;
537
538 QETH_CARD_TEXT(card, 2, "addipato");
539
540 mutex_lock(&card->conf_mutex);
541 mutex_lock(&card->ip_lock);
542
543 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
544 if (ipatoe->proto != new->proto)
545 continue;
546 if (!memcmp(ipatoe->addr, new->addr,
547 (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
548 (ipatoe->mask_bits == new->mask_bits)) {
549 rc = -EEXIST;
550 break;
551 }
552 }
553
554 if (!rc) {
555 list_add_tail(&new->entry, &card->ipato.entries);
556 qeth_l3_update_ipato(card);
557 }
558
559 mutex_unlock(&card->ip_lock);
560 mutex_unlock(&card->conf_mutex);
561
562 return rc;
563 }
564
565 int qeth_l3_del_ipato_entry(struct qeth_card *card,
566 enum qeth_prot_versions proto, u8 *addr,
567 int mask_bits)
568 {
569 struct qeth_ipato_entry *ipatoe, *tmp;
570 int rc = -ENOENT;
571
572 QETH_CARD_TEXT(card, 2, "delipato");
573
574 mutex_lock(&card->conf_mutex);
575 mutex_lock(&card->ip_lock);
576
577 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
578 if (ipatoe->proto != proto)
579 continue;
580 if (!memcmp(ipatoe->addr, addr,
581 (proto == QETH_PROT_IPV4)? 4:16) &&
582 (ipatoe->mask_bits == mask_bits)) {
583 list_del(&ipatoe->entry);
584 qeth_l3_update_ipato(card);
585 kfree(ipatoe);
586 rc = 0;
587 }
588 }
589
590 mutex_unlock(&card->ip_lock);
591 mutex_unlock(&card->conf_mutex);
592
593 return rc;
594 }
595
596 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
597 enum qeth_ip_types type,
598 enum qeth_prot_versions proto)
599 {
600 struct qeth_ipaddr addr;
601 int rc;
602
603 qeth_l3_init_ipaddr(&addr, type, proto);
604 if (proto == QETH_PROT_IPV4)
605 memcpy(&addr.u.a4.addr, ip, 4);
606 else
607 memcpy(&addr.u.a6.addr, ip, 16);
608
609 mutex_lock(&card->conf_mutex);
610 rc = qeth_l3_modify_ip(card, &addr, add);
611 mutex_unlock(&card->conf_mutex);
612
613 return rc;
614 }
615
616 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
617 {
618 struct qeth_ipaddr addr;
619 unsigned int i;
620
621 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
622 addr.u.a6.addr.s6_addr[0] = 0xfe;
623 addr.u.a6.addr.s6_addr[1] = 0x80;
624 for (i = 0; i < 8; i++)
625 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
626
627 return qeth_l3_modify_ip(card, &addr, add);
628 }
629
630 static int qeth_l3_register_addr_entry(struct qeth_card *card,
631 struct qeth_ipaddr *addr)
632 {
633 char buf[50];
634 int rc = 0;
635 int cnt = 3;
636
637 if (card->options.sniffer)
638 return 0;
639
640 if (addr->proto == QETH_PROT_IPV4) {
641 QETH_CARD_TEXT(card, 2, "setaddr4");
642 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
643 } else if (addr->proto == QETH_PROT_IPV6) {
644 QETH_CARD_TEXT(card, 2, "setaddr6");
645 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
646 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
647 } else {
648 QETH_CARD_TEXT(card, 2, "setaddr?");
649 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
650 }
651 do {
652 if (addr->is_multicast)
653 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
654 else
655 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
656 if (rc)
657 QETH_CARD_TEXT(card, 2, "failed");
658 } while ((--cnt > 0) && rc);
659 if (rc) {
660 QETH_CARD_TEXT(card, 2, "FAILED");
661 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
662 dev_warn(&card->gdev->dev,
663 "Registering IP address %s failed\n", buf);
664 }
665 return rc;
666 }
667
668 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
669 struct qeth_ipaddr *addr)
670 {
671 int rc = 0;
672
673 if (card->options.sniffer)
674 return 0;
675
676 if (addr->proto == QETH_PROT_IPV4) {
677 QETH_CARD_TEXT(card, 2, "deladdr4");
678 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
679 } else if (addr->proto == QETH_PROT_IPV6) {
680 QETH_CARD_TEXT(card, 2, "deladdr6");
681 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
682 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
683 } else {
684 QETH_CARD_TEXT(card, 2, "deladdr?");
685 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
686 }
687 if (addr->is_multicast)
688 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
689 else
690 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
691 if (rc)
692 QETH_CARD_TEXT(card, 2, "failed");
693
694 return rc;
695 }
696
697 static int qeth_l3_setadapter_parms(struct qeth_card *card)
698 {
699 int rc = 0;
700
701 QETH_CARD_TEXT(card, 2, "setadprm");
702
703 if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
704 rc = qeth_setadpparms_change_macaddr(card);
705 if (rc)
706 dev_warn(&card->gdev->dev, "Reading the adapter MAC"
707 " address failed\n");
708 }
709
710 return rc;
711 }
712
713 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
714 {
715 int rc;
716
717 QETH_CARD_TEXT(card, 3, "ipaarp");
718
719 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
720 dev_info(&card->gdev->dev,
721 "ARP processing not supported on %s!\n",
722 QETH_CARD_IFNAME(card));
723 return 0;
724 }
725 rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
726 IPA_CMD_ASS_START, NULL);
727 if (rc) {
728 dev_warn(&card->gdev->dev,
729 "Starting ARP processing support for %s failed\n",
730 QETH_CARD_IFNAME(card));
731 }
732 return rc;
733 }
734
735 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
736 {
737 int rc;
738
739 QETH_CARD_TEXT(card, 3, "stsrcmac");
740
741 if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
742 dev_info(&card->gdev->dev,
743 "Inbound source MAC-address not supported on %s\n",
744 QETH_CARD_IFNAME(card));
745 return -EOPNOTSUPP;
746 }
747
748 rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
749 IPA_CMD_ASS_START, NULL);
750 if (rc)
751 dev_warn(&card->gdev->dev,
752 "Starting source MAC-address support for %s failed\n",
753 QETH_CARD_IFNAME(card));
754 return rc;
755 }
756
757 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
758 {
759 int rc = 0;
760
761 QETH_CARD_TEXT(card, 3, "strtvlan");
762
763 if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
764 dev_info(&card->gdev->dev,
765 "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
766 return -EOPNOTSUPP;
767 }
768
769 rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
770 IPA_CMD_ASS_START, NULL);
771 if (rc) {
772 dev_warn(&card->gdev->dev,
773 "Starting VLAN support for %s failed\n",
774 QETH_CARD_IFNAME(card));
775 } else {
776 dev_info(&card->gdev->dev, "VLAN enabled\n");
777 }
778 return rc;
779 }
780
781 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
782 {
783 int rc;
784
785 QETH_CARD_TEXT(card, 3, "stmcast");
786
787 if (!qeth_is_supported(card, IPA_MULTICASTING)) {
788 dev_info(&card->gdev->dev,
789 "Multicast not supported on %s\n",
790 QETH_CARD_IFNAME(card));
791 return -EOPNOTSUPP;
792 }
793
794 rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
795 IPA_CMD_ASS_START, NULL);
796 if (rc) {
797 dev_warn(&card->gdev->dev,
798 "Starting multicast support for %s failed\n",
799 QETH_CARD_IFNAME(card));
800 } else {
801 dev_info(&card->gdev->dev, "Multicast enabled\n");
802 card->dev->flags |= IFF_MULTICAST;
803 }
804 return rc;
805 }
806
807 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
808 {
809 u32 ipv6_data = 3;
810 int rc;
811
812 QETH_CARD_TEXT(card, 3, "softipv6");
813
814 if (IS_IQD(card))
815 goto out;
816
817 rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
818 &ipv6_data);
819 if (rc) {
820 dev_err(&card->gdev->dev,
821 "Activating IPv6 support for %s failed\n",
822 QETH_CARD_IFNAME(card));
823 return rc;
824 }
825 rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
826 NULL);
827 if (rc) {
828 dev_err(&card->gdev->dev,
829 "Activating IPv6 support for %s failed\n",
830 QETH_CARD_IFNAME(card));
831 return rc;
832 }
833 rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
834 IPA_CMD_ASS_START, NULL);
835 if (rc) {
836 dev_warn(&card->gdev->dev,
837 "Enabling the passthrough mode for %s failed\n",
838 QETH_CARD_IFNAME(card));
839 return rc;
840 }
841 out:
842 dev_info(&card->gdev->dev, "IPV6 enabled\n");
843 return 0;
844 }
845
846 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
847 {
848 QETH_CARD_TEXT(card, 3, "strtipv6");
849
850 if (!qeth_is_supported(card, IPA_IPV6)) {
851 dev_info(&card->gdev->dev,
852 "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
853 return 0;
854 }
855 return qeth_l3_softsetup_ipv6(card);
856 }
857
858 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
859 {
860 u32 filter_data = 1;
861 int rc;
862
863 QETH_CARD_TEXT(card, 3, "stbrdcst");
864 card->info.broadcast_capable = 0;
865 if (!qeth_is_supported(card, IPA_FILTERING)) {
866 dev_info(&card->gdev->dev,
867 "Broadcast not supported on %s\n",
868 QETH_CARD_IFNAME(card));
869 rc = -EOPNOTSUPP;
870 goto out;
871 }
872 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
873 IPA_CMD_ASS_START, NULL);
874 if (rc) {
875 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
876 "%s failed\n", QETH_CARD_IFNAME(card));
877 goto out;
878 }
879
880 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
881 IPA_CMD_ASS_CONFIGURE, &filter_data);
882 if (rc) {
883 dev_warn(&card->gdev->dev,
884 "Setting up broadcast filtering for %s failed\n",
885 QETH_CARD_IFNAME(card));
886 goto out;
887 }
888 card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
889 dev_info(&card->gdev->dev, "Broadcast enabled\n");
890 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
891 IPA_CMD_ASS_ENABLE, &filter_data);
892 if (rc) {
893 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
894 "filtering for %s failed\n", QETH_CARD_IFNAME(card));
895 goto out;
896 }
897 card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
898 out:
899 if (card->info.broadcast_capable)
900 card->dev->flags |= IFF_BROADCAST;
901 else
902 card->dev->flags &= ~IFF_BROADCAST;
903 return rc;
904 }
905
906 static int qeth_l3_start_ipassists(struct qeth_card *card)
907 {
908 QETH_CARD_TEXT(card, 3, "strtipas");
909
910 qeth_l3_start_ipa_arp_processing(card); /* go on*/
911 qeth_l3_start_ipa_source_mac(card); /* go on*/
912 qeth_l3_start_ipa_vlan(card); /* go on*/
913 qeth_l3_start_ipa_multicast(card); /* go on*/
914 qeth_l3_start_ipa_ipv6(card); /* go on*/
915 qeth_l3_start_ipa_broadcast(card); /* go on*/
916 return 0;
917 }
918
919 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
920 struct qeth_reply *reply, unsigned long data)
921 {
922 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
923
924 if (cmd->hdr.return_code)
925 return -EIO;
926
927 ether_addr_copy(card->dev->dev_addr,
928 cmd->data.create_destroy_addr.unique_id);
929 return 0;
930 }
931
932 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
933 {
934 int rc = 0;
935 struct qeth_cmd_buffer *iob;
936 struct qeth_ipa_cmd *cmd;
937
938 QETH_CARD_TEXT(card, 2, "hsrmac");
939
940 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
941 IPA_DATA_SIZEOF(create_destroy_addr));
942 if (!iob)
943 return -ENOMEM;
944 cmd = __ipa_cmd(iob);
945 *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
946 card->info.unique_id;
947
948 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
949 NULL);
950 return rc;
951 }
952
953 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
954 struct qeth_reply *reply, unsigned long data)
955 {
956 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
957
958 if (cmd->hdr.return_code == 0) {
959 card->info.unique_id = *((__u16 *)
960 &cmd->data.create_destroy_addr.unique_id[6]);
961 return 0;
962 }
963
964 card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
965 UNIQUE_ID_NOT_BY_CARD;
966 dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
967 return -EIO;
968 }
969
970 static int qeth_l3_get_unique_id(struct qeth_card *card)
971 {
972 int rc = 0;
973 struct qeth_cmd_buffer *iob;
974 struct qeth_ipa_cmd *cmd;
975
976 QETH_CARD_TEXT(card, 2, "guniqeid");
977
978 if (!qeth_is_supported(card, IPA_IPV6)) {
979 card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
980 UNIQUE_ID_NOT_BY_CARD;
981 return 0;
982 }
983
984 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
985 IPA_DATA_SIZEOF(create_destroy_addr));
986 if (!iob)
987 return -ENOMEM;
988 cmd = __ipa_cmd(iob);
989 *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
990 card->info.unique_id;
991
992 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
993 return rc;
994 }
995
996 static int
997 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
998 unsigned long data)
999 {
1000 struct qeth_ipa_cmd *cmd;
1001 __u16 rc;
1002
1003 QETH_CARD_TEXT(card, 2, "diastrcb");
1004
1005 cmd = (struct qeth_ipa_cmd *)data;
1006 rc = cmd->hdr.return_code;
1007 if (rc)
1008 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
1009 switch (cmd->data.diagass.action) {
1010 case QETH_DIAGS_CMD_TRACE_QUERY:
1011 break;
1012 case QETH_DIAGS_CMD_TRACE_DISABLE:
1013 switch (rc) {
1014 case 0:
1015 case IPA_RC_INVALID_SUBCMD:
1016 card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1017 dev_info(&card->gdev->dev, "The HiperSockets network "
1018 "traffic analyzer is deactivated\n");
1019 break;
1020 default:
1021 break;
1022 }
1023 break;
1024 case QETH_DIAGS_CMD_TRACE_ENABLE:
1025 switch (rc) {
1026 case 0:
1027 card->info.promisc_mode = SET_PROMISC_MODE_ON;
1028 dev_info(&card->gdev->dev, "The HiperSockets network "
1029 "traffic analyzer is activated\n");
1030 break;
1031 case IPA_RC_HARDWARE_AUTH_ERROR:
1032 dev_warn(&card->gdev->dev, "The device is not "
1033 "authorized to run as a HiperSockets network "
1034 "traffic analyzer\n");
1035 break;
1036 case IPA_RC_TRACE_ALREADY_ACTIVE:
1037 dev_warn(&card->gdev->dev, "A HiperSockets "
1038 "network traffic analyzer is already "
1039 "active in the HiperSockets LAN\n");
1040 break;
1041 default:
1042 break;
1043 }
1044 break;
1045 default:
1046 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1047 cmd->data.diagass.action, CARD_DEVID(card));
1048 }
1049
1050 return rc ? -EIO : 0;
1051 }
1052
1053 static int
1054 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1055 {
1056 struct qeth_cmd_buffer *iob;
1057 struct qeth_ipa_cmd *cmd;
1058
1059 QETH_CARD_TEXT(card, 2, "diagtrac");
1060
1061 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1062 if (!iob)
1063 return -ENOMEM;
1064 cmd = __ipa_cmd(iob);
1065 cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1066 cmd->data.diagass.action = diags_cmd;
1067 return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1068 }
1069
1070 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1071 {
1072 struct qeth_card *card = arg;
1073 struct inet6_dev *in6_dev;
1074 struct in_device *in4_dev;
1075 struct qeth_ipaddr *ipm;
1076 struct qeth_ipaddr tmp;
1077 struct ip_mc_list *im4;
1078 struct ifmcaddr6 *im6;
1079
1080 QETH_CARD_TEXT(card, 4, "addmc");
1081
1082 if (!dev || !(dev->flags & IFF_UP))
1083 goto out;
1084
1085 in4_dev = __in_dev_get_rtnl(dev);
1086 if (!in4_dev)
1087 goto walk_ipv6;
1088
1089 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1090 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1091 tmp.is_multicast = 1;
1092
1093 for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1094 im4 = rtnl_dereference(im4->next_rcu)) {
1095 tmp.u.a4.addr = im4->multiaddr;
1096
1097 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1098 if (ipm) {
1099 /* for mcast, by-IP match means full match */
1100 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1101 continue;
1102 }
1103
1104 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1105 if (!ipm)
1106 continue;
1107
1108 hash_add(card->ip_mc_htable, &ipm->hnode,
1109 qeth_l3_ipaddr_hash(ipm));
1110 }
1111
1112 walk_ipv6:
1113 if (!qeth_is_supported(card, IPA_IPV6))
1114 goto out;
1115
1116 in6_dev = __in6_dev_get(dev);
1117 if (!in6_dev)
1118 goto out;
1119
1120 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1121 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1122 tmp.is_multicast = 1;
1123
1124 read_lock_bh(&in6_dev->lock);
1125 for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1126 tmp.u.a6.addr = im6->mca_addr;
1127
1128 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1129 if (ipm) {
1130 /* for mcast, by-IP match means full match */
1131 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1132 continue;
1133 }
1134
1135 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1136 if (!ipm)
1137 continue;
1138
1139 hash_add(card->ip_mc_htable,
1140 &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1141
1142 }
1143 read_unlock_bh(&in6_dev->lock);
1144
1145 out:
1146 return 0;
1147 }
1148
1149 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1150 __be16 proto, u16 vid)
1151 {
1152 struct qeth_card *card = dev->ml_priv;
1153
1154 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1155 return 0;
1156 }
1157
1158 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1159 __be16 proto, u16 vid)
1160 {
1161 struct qeth_card *card = dev->ml_priv;
1162
1163 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1164 return 0;
1165 }
1166
1167 static void qeth_l3_stop_card(struct qeth_card *card)
1168 {
1169 QETH_CARD_TEXT(card, 2, "stopcard");
1170
1171 qeth_set_allowed_threads(card, 0, 1);
1172
1173 cancel_work_sync(&card->rx_mode_work);
1174 qeth_l3_drain_rx_mode_cache(card);
1175
1176 if (card->options.sniffer &&
1177 (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1178 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1179
1180 if (card->state == CARD_STATE_SOFTSETUP) {
1181 qeth_l3_clear_ip_htable(card, 1);
1182 qeth_clear_ipacmd_list(card);
1183 card->state = CARD_STATE_HARDSETUP;
1184 }
1185 if (card->state == CARD_STATE_HARDSETUP) {
1186 qeth_drain_output_queues(card);
1187 qeth_clear_working_pool_list(card);
1188 card->state = CARD_STATE_DOWN;
1189 }
1190
1191 qeth_qdio_clear_card(card, 0);
1192 flush_workqueue(card->event_wq);
1193 card->info.promisc_mode = 0;
1194 }
1195
1196 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1197 {
1198 bool enable = card->dev->flags & IFF_PROMISC;
1199
1200 if (card->info.promisc_mode == enable)
1201 return;
1202
1203 if (IS_VM_NIC(card)) { /* Guestlan trace */
1204 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1205 qeth_setadp_promisc_mode(card, enable);
1206 } else if (card->options.sniffer && /* HiperSockets trace */
1207 qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1208 if (enable) {
1209 QETH_CARD_TEXT(card, 3, "+promisc");
1210 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1211 } else {
1212 QETH_CARD_TEXT(card, 3, "-promisc");
1213 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1214 }
1215 }
1216 }
1217
1218 static void qeth_l3_rx_mode_work(struct work_struct *work)
1219 {
1220 struct qeth_card *card = container_of(work, struct qeth_card,
1221 rx_mode_work);
1222 struct qeth_ipaddr *addr;
1223 struct hlist_node *tmp;
1224 int i, rc;
1225
1226 QETH_CARD_TEXT(card, 3, "setmulti");
1227
1228 if (!card->options.sniffer) {
1229 rtnl_lock();
1230 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1231 if (qeth_is_supported(card, IPA_FULL_VLAN))
1232 vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1233 rtnl_unlock();
1234
1235 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1236 switch (addr->disp_flag) {
1237 case QETH_DISP_ADDR_DELETE:
1238 rc = qeth_l3_deregister_addr_entry(card, addr);
1239 if (!rc || rc == -ENOENT) {
1240 hash_del(&addr->hnode);
1241 kfree(addr);
1242 }
1243 break;
1244 case QETH_DISP_ADDR_ADD:
1245 rc = qeth_l3_register_addr_entry(card, addr);
1246 if (rc && rc != -ENETDOWN) {
1247 hash_del(&addr->hnode);
1248 kfree(addr);
1249 break;
1250 }
1251 addr->ref_counter = 1;
1252 /* fall through */
1253 default:
1254 /* for next call to set_rx_mode(): */
1255 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1256 }
1257 }
1258 }
1259
1260 qeth_l3_set_promisc_mode(card);
1261 }
1262
1263 static int qeth_l3_arp_makerc(u16 rc)
1264 {
1265 switch (rc) {
1266 case IPA_RC_SUCCESS:
1267 return 0;
1268 case QETH_IPA_ARP_RC_NOTSUPP:
1269 case QETH_IPA_ARP_RC_Q_NOTSUPP:
1270 return -EOPNOTSUPP;
1271 case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1272 return -EINVAL;
1273 case QETH_IPA_ARP_RC_Q_NO_DATA:
1274 return -ENOENT;
1275 default:
1276 return -EIO;
1277 }
1278 }
1279
1280 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1281 unsigned long data)
1282 {
1283 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1284
1285 qeth_setassparms_cb(card, reply, data);
1286 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1287 }
1288
1289 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1290 {
1291 struct qeth_cmd_buffer *iob;
1292 int rc;
1293
1294 QETH_CARD_TEXT(card, 3, "arpstnoe");
1295
1296 /*
1297 * currently GuestLAN only supports the ARP assist function
1298 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1299 * thus we say EOPNOTSUPP for this ARP function
1300 */
1301 if (IS_VM_NIC(card))
1302 return -EOPNOTSUPP;
1303 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1304 return -EOPNOTSUPP;
1305 }
1306
1307 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1308 IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1309 SETASS_DATA_SIZEOF(flags_32bit),
1310 QETH_PROT_IPV4);
1311 if (!iob)
1312 return -ENOMEM;
1313
1314 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1315 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1316 if (rc)
1317 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1318 CARD_DEVID(card), rc);
1319 return rc;
1320 }
1321
1322 static __u32 get_arp_entry_size(struct qeth_card *card,
1323 struct qeth_arp_query_data *qdata,
1324 struct qeth_arp_entrytype *type, __u8 strip_entries)
1325 {
1326 __u32 rc;
1327 __u8 is_hsi;
1328
1329 is_hsi = qdata->reply_bits == 5;
1330 if (type->ip == QETHARP_IP_ADDR_V4) {
1331 QETH_CARD_TEXT(card, 4, "arpev4");
1332 if (strip_entries) {
1333 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1334 sizeof(struct qeth_arp_qi_entry7_short);
1335 } else {
1336 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1337 sizeof(struct qeth_arp_qi_entry7);
1338 }
1339 } else if (type->ip == QETHARP_IP_ADDR_V6) {
1340 QETH_CARD_TEXT(card, 4, "arpev6");
1341 if (strip_entries) {
1342 rc = is_hsi ?
1343 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1344 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1345 } else {
1346 rc = is_hsi ?
1347 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1348 sizeof(struct qeth_arp_qi_entry7_ipv6);
1349 }
1350 } else {
1351 QETH_CARD_TEXT(card, 4, "arpinv");
1352 rc = 0;
1353 }
1354
1355 return rc;
1356 }
1357
1358 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1359 {
1360 return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1361 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1362 }
1363
1364 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1365 struct qeth_reply *reply, unsigned long data)
1366 {
1367 struct qeth_ipa_cmd *cmd;
1368 struct qeth_arp_query_data *qdata;
1369 struct qeth_arp_query_info *qinfo;
1370 int e;
1371 int entrybytes_done;
1372 int stripped_bytes;
1373 __u8 do_strip_entries;
1374
1375 QETH_CARD_TEXT(card, 3, "arpquecb");
1376
1377 qinfo = (struct qeth_arp_query_info *) reply->param;
1378 cmd = (struct qeth_ipa_cmd *) data;
1379 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1380 if (cmd->hdr.return_code) {
1381 QETH_CARD_TEXT(card, 4, "arpcberr");
1382 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1383 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1384 }
1385 if (cmd->data.setassparms.hdr.return_code) {
1386 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1387 QETH_CARD_TEXT(card, 4, "setaperr");
1388 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1389 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1390 }
1391 qdata = &cmd->data.setassparms.data.query_arp;
1392 QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1393
1394 do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1395 stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1396 entrybytes_done = 0;
1397 for (e = 0; e < qdata->no_entries; ++e) {
1398 char *cur_entry;
1399 __u32 esize;
1400 struct qeth_arp_entrytype *etype;
1401
1402 cur_entry = &qdata->data + entrybytes_done;
1403 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1404 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1405 QETH_CARD_TEXT(card, 4, "pmis");
1406 QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1407 break;
1408 }
1409 esize = get_arp_entry_size(card, qdata, etype,
1410 do_strip_entries);
1411 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1412 if (!esize)
1413 break;
1414
1415 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1416 QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1417 memset(qinfo->udata, 0, 4);
1418 return -ENOSPC;
1419 }
1420
1421 memcpy(qinfo->udata + qinfo->udata_offset,
1422 &qdata->data + entrybytes_done + stripped_bytes,
1423 esize);
1424 entrybytes_done += esize + stripped_bytes;
1425 qinfo->udata_offset += esize;
1426 ++qinfo->no_entries;
1427 }
1428 /* check if all replies received ... */
1429 if (cmd->data.setassparms.hdr.seq_no <
1430 cmd->data.setassparms.hdr.number_of_replies)
1431 return 1;
1432 QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1433 memcpy(qinfo->udata, &qinfo->no_entries, 4);
1434 /* keep STRIP_ENTRIES flag so the user program can distinguish
1435 * stripped entries from normal ones */
1436 if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1437 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1438 memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1439 QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1440 return 0;
1441 }
1442
1443 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1444 enum qeth_prot_versions prot,
1445 struct qeth_arp_query_info *qinfo)
1446 {
1447 struct qeth_cmd_buffer *iob;
1448 struct qeth_ipa_cmd *cmd;
1449 int rc;
1450
1451 QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1452
1453 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1454 IPA_CMD_ASS_ARP_QUERY_INFO,
1455 SETASS_DATA_SIZEOF(query_arp), prot);
1456 if (!iob)
1457 return -ENOMEM;
1458 cmd = __ipa_cmd(iob);
1459 cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1460 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1461 if (rc)
1462 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1463 CARD_DEVID(card), rc);
1464 return rc;
1465 }
1466
1467 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1468 {
1469 struct qeth_arp_query_info qinfo = {0, };
1470 int rc;
1471
1472 QETH_CARD_TEXT(card, 3, "arpquery");
1473
1474 if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1475 IPA_ARP_PROCESSING)) {
1476 QETH_CARD_TEXT(card, 3, "arpqnsup");
1477 rc = -EOPNOTSUPP;
1478 goto out;
1479 }
1480 /* get size of userspace buffer and mask_bits -> 6 bytes */
1481 if (copy_from_user(&qinfo, udata, 6)) {
1482 rc = -EFAULT;
1483 goto out;
1484 }
1485 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1486 if (!qinfo.udata) {
1487 rc = -ENOMEM;
1488 goto out;
1489 }
1490 qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1491 rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1492 if (rc) {
1493 if (copy_to_user(udata, qinfo.udata, 4))
1494 rc = -EFAULT;
1495 goto free_and_out;
1496 }
1497 if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1498 /* fails in case of GuestLAN QDIO mode */
1499 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1500 }
1501 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1502 QETH_CARD_TEXT(card, 4, "qactf");
1503 rc = -EFAULT;
1504 goto free_and_out;
1505 }
1506 QETH_CARD_TEXT(card, 4, "qacts");
1507
1508 free_and_out:
1509 kfree(qinfo.udata);
1510 out:
1511 return rc;
1512 }
1513
1514 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1515 struct qeth_arp_cache_entry *entry,
1516 enum qeth_arp_process_subcmds arp_cmd)
1517 {
1518 struct qeth_arp_cache_entry *cmd_entry;
1519 struct qeth_cmd_buffer *iob;
1520 int rc;
1521
1522 if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1523 QETH_CARD_TEXT(card, 3, "arpadd");
1524 else
1525 QETH_CARD_TEXT(card, 3, "arpdel");
1526
1527 /*
1528 * currently GuestLAN only supports the ARP assist function
1529 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1530 * thus we say EOPNOTSUPP for this ARP function
1531 */
1532 if (IS_VM_NIC(card))
1533 return -EOPNOTSUPP;
1534 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1535 return -EOPNOTSUPP;
1536 }
1537
1538 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1539 SETASS_DATA_SIZEOF(arp_entry),
1540 QETH_PROT_IPV4);
1541 if (!iob)
1542 return -ENOMEM;
1543
1544 cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1545 ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1546 memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1547 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1548 if (rc)
1549 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1550 arp_cmd, CARD_DEVID(card), rc);
1551 return rc;
1552 }
1553
1554 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1555 {
1556 struct qeth_cmd_buffer *iob;
1557 int rc;
1558
1559 QETH_CARD_TEXT(card, 3, "arpflush");
1560
1561 /*
1562 * currently GuestLAN only supports the ARP assist function
1563 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1564 * thus we say EOPNOTSUPP for this ARP function
1565 */
1566 if (IS_VM_NIC(card) || IS_IQD(card))
1567 return -EOPNOTSUPP;
1568 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1569 return -EOPNOTSUPP;
1570 }
1571
1572 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1573 IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1574 QETH_PROT_IPV4);
1575 if (!iob)
1576 return -ENOMEM;
1577
1578 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1579 if (rc)
1580 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1581 CARD_DEVID(card), rc);
1582 return rc;
1583 }
1584
1585 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1586 {
1587 struct qeth_card *card = dev->ml_priv;
1588 struct qeth_arp_cache_entry arp_entry;
1589 enum qeth_arp_process_subcmds arp_cmd;
1590 int rc = 0;
1591
1592 switch (cmd) {
1593 case SIOC_QETH_ARP_SET_NO_ENTRIES:
1594 if (!capable(CAP_NET_ADMIN)) {
1595 rc = -EPERM;
1596 break;
1597 }
1598 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1599 break;
1600 case SIOC_QETH_ARP_QUERY_INFO:
1601 if (!capable(CAP_NET_ADMIN)) {
1602 rc = -EPERM;
1603 break;
1604 }
1605 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1606 break;
1607 case SIOC_QETH_ARP_ADD_ENTRY:
1608 case SIOC_QETH_ARP_REMOVE_ENTRY:
1609 if (!capable(CAP_NET_ADMIN))
1610 return -EPERM;
1611 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1612 return -EFAULT;
1613
1614 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1615 IPA_CMD_ASS_ARP_ADD_ENTRY :
1616 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1617 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1618 case SIOC_QETH_ARP_FLUSH_CACHE:
1619 if (!capable(CAP_NET_ADMIN)) {
1620 rc = -EPERM;
1621 break;
1622 }
1623 rc = qeth_l3_arp_flush_cache(card);
1624 break;
1625 default:
1626 rc = -EOPNOTSUPP;
1627 }
1628 return rc;
1629 }
1630
1631 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1632 int ipv)
1633 {
1634 struct neighbour *n = NULL;
1635
1636 if (dst)
1637 n = dst_neigh_lookup_skb(dst, skb);
1638
1639 if (n) {
1640 int cast_type = n->type;
1641
1642 neigh_release(n);
1643 if ((cast_type == RTN_BROADCAST) ||
1644 (cast_type == RTN_MULTICAST) ||
1645 (cast_type == RTN_ANYCAST))
1646 return cast_type;
1647 return RTN_UNICAST;
1648 }
1649
1650 /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1651 switch (ipv) {
1652 case 4:
1653 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1654 return RTN_BROADCAST;
1655 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1656 RTN_MULTICAST : RTN_UNICAST;
1657 case 6:
1658 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1659 RTN_MULTICAST : RTN_UNICAST;
1660 default:
1661 /* ... and MAC address */
1662 return qeth_get_ether_cast_type(skb);
1663 }
1664 }
1665
1666 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1667 {
1668 int ipv = qeth_get_ip_version(skb);
1669 struct dst_entry *dst;
1670 int cast_type;
1671
1672 rcu_read_lock();
1673 dst = qeth_dst_check_rcu(skb, ipv);
1674 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1675 rcu_read_unlock();
1676
1677 return cast_type;
1678 }
1679
1680 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1681 {
1682 if (cast_type == RTN_MULTICAST)
1683 return QETH_CAST_MULTICAST;
1684 if (cast_type == RTN_ANYCAST)
1685 return QETH_CAST_ANYCAST;
1686 if (cast_type == RTN_BROADCAST)
1687 return QETH_CAST_BROADCAST;
1688 return QETH_CAST_UNICAST;
1689 }
1690
1691 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1692 struct qeth_hdr *hdr, struct sk_buff *skb,
1693 int ipv, unsigned int data_len)
1694 {
1695 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1696 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1697 struct qeth_card *card = queue->card;
1698 struct dst_entry *dst;
1699 int cast_type;
1700
1701 hdr->hdr.l3.length = data_len;
1702
1703 if (skb_is_gso(skb)) {
1704 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1705 } else {
1706 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1707
1708 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1709 l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1710 l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
1711 memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
1712 iucv_trans_hdr(skb)->destUserID, 8);
1713 return;
1714 }
1715
1716 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1717 qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1718 /* some HW requires combined L3+L4 csum offload: */
1719 if (ipv == 4)
1720 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1721 }
1722 }
1723
1724 if (ipv == 4 || IS_IQD(card)) {
1725 /* NETIF_F_HW_VLAN_CTAG_TX */
1726 if (skb_vlan_tag_present(skb)) {
1727 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1728 hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1729 }
1730 } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1731 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1732 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1733 }
1734
1735 rcu_read_lock();
1736 dst = qeth_dst_check_rcu(skb, ipv);
1737
1738 if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1739 cast_type = RTN_UNICAST;
1740 else
1741 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1742 l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1743
1744 if (ipv == 4) {
1745 struct rtable *rt = (struct rtable *) dst;
1746
1747 *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
1748 rt_nexthop(rt, ip_hdr(skb)->daddr) :
1749 ip_hdr(skb)->daddr;
1750 } else if (ipv == 6) {
1751 struct rt6_info *rt = (struct rt6_info *) dst;
1752
1753 if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
1754 l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
1755 else
1756 l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
1757
1758 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1759 if (!IS_IQD(card))
1760 hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1761 } else {
1762 /* OSA only: */
1763 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1764 }
1765 rcu_read_unlock();
1766 }
1767
1768 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1769 {
1770 struct iphdr *iph = ip_hdr(skb);
1771
1772 /* this is safe, IPv6 traffic takes a different path */
1773 if (skb->ip_summed == CHECKSUM_PARTIAL)
1774 iph->check = 0;
1775 if (skb_is_gso(skb)) {
1776 iph->tot_len = 0;
1777 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1778 iph->daddr, 0);
1779 }
1780 }
1781
1782 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1783 struct qeth_qdio_out_q *queue, int ipv)
1784 {
1785 unsigned int hw_hdr_len;
1786 int rc;
1787
1788 /* re-use the L2 header area for the HW header: */
1789 hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1790 sizeof(struct qeth_hdr);
1791 rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1792 if (rc)
1793 return rc;
1794 skb_pull(skb, ETH_HLEN);
1795
1796 qeth_l3_fixup_headers(skb);
1797 return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1798 }
1799
1800 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1801 struct net_device *dev)
1802 {
1803 struct qeth_card *card = dev->ml_priv;
1804 u16 txq = skb_get_queue_mapping(skb);
1805 int ipv = qeth_get_ip_version(skb);
1806 struct qeth_qdio_out_q *queue;
1807 int rc;
1808
1809 if (!skb_is_gso(skb))
1810 qdisc_skb_cb(skb)->pkt_len = skb->len;
1811 if (IS_IQD(card)) {
1812 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1813
1814 if (card->options.sniffer)
1815 goto tx_drop;
1816 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1817 (card->options.cq == QETH_CQ_ENABLED &&
1818 skb->protocol != htons(ETH_P_AF_IUCV)))
1819 goto tx_drop;
1820 } else {
1821 queue = card->qdio.out_qs[txq];
1822 }
1823
1824 if (!(dev->flags & IFF_BROADCAST) &&
1825 qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1826 goto tx_drop;
1827
1828 if (ipv == 4 || IS_IQD(card))
1829 rc = qeth_l3_xmit(card, skb, queue, ipv);
1830 else
1831 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1832
1833 if (!rc)
1834 return NETDEV_TX_OK;
1835
1836 tx_drop:
1837 QETH_TXQ_STAT_INC(queue, tx_dropped);
1838 kfree_skb(skb);
1839 return NETDEV_TX_OK;
1840 }
1841
1842 static void qeth_l3_set_rx_mode(struct net_device *dev)
1843 {
1844 struct qeth_card *card = dev->ml_priv;
1845
1846 schedule_work(&card->rx_mode_work);
1847 }
1848
1849 /*
1850 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1851 * NOARP on the netdevice is no option because it also turns off neighbor
1852 * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1853 * arp resolution but we want the hard header (packet socket will work
1854 * e.g. tcpdump)
1855 */
1856 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1857 {
1858 n->nud_state = NUD_NOARP;
1859 memcpy(n->ha, "FAKELL", 6);
1860 n->output = n->ops->connected_output;
1861 return 0;
1862 }
1863
1864 static int
1865 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1866 {
1867 if (np->tbl->family == AF_INET)
1868 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1869
1870 return 0;
1871 }
1872
1873 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1874 struct net_device *dev,
1875 netdev_features_t features)
1876 {
1877 if (qeth_get_ip_version(skb) != 4)
1878 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1879 return qeth_features_check(skb, dev, features);
1880 }
1881
1882 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1883 struct net_device *sb_dev)
1884 {
1885 return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1886 sb_dev);
1887 }
1888
1889 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1890 struct net_device *sb_dev)
1891 {
1892 struct qeth_card *card = dev->ml_priv;
1893
1894 return qeth_get_priority_queue(card, skb);
1895 }
1896
1897 static const struct net_device_ops qeth_l3_netdev_ops = {
1898 .ndo_open = qeth_open,
1899 .ndo_stop = qeth_stop,
1900 .ndo_get_stats64 = qeth_get_stats64,
1901 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1902 .ndo_select_queue = qeth_l3_iqd_select_queue,
1903 .ndo_validate_addr = eth_validate_addr,
1904 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1905 .ndo_do_ioctl = qeth_do_ioctl,
1906 .ndo_fix_features = qeth_fix_features,
1907 .ndo_set_features = qeth_set_features,
1908 .ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
1909 .ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
1910 .ndo_tx_timeout = qeth_tx_timeout,
1911 };
1912
1913 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1914 .ndo_open = qeth_open,
1915 .ndo_stop = qeth_stop,
1916 .ndo_get_stats64 = qeth_get_stats64,
1917 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1918 .ndo_features_check = qeth_l3_osa_features_check,
1919 .ndo_select_queue = qeth_l3_osa_select_queue,
1920 .ndo_validate_addr = eth_validate_addr,
1921 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1922 .ndo_do_ioctl = qeth_do_ioctl,
1923 .ndo_fix_features = qeth_fix_features,
1924 .ndo_set_features = qeth_set_features,
1925 .ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
1926 .ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
1927 .ndo_tx_timeout = qeth_tx_timeout,
1928 .ndo_neigh_setup = qeth_l3_neigh_setup,
1929 };
1930
1931 static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
1932 {
1933 unsigned int headroom;
1934 int rc;
1935
1936 if (IS_OSD(card) || IS_OSX(card)) {
1937 if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
1938 (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
1939 pr_info("qeth_l3: ignoring TR device\n");
1940 return -ENODEV;
1941 }
1942
1943 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1944
1945 /*IPv6 address autoconfiguration stuff*/
1946 qeth_l3_get_unique_id(card);
1947 if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
1948 card->dev->dev_id = card->info.unique_id & 0xffff;
1949
1950 if (!IS_VM_NIC(card)) {
1951 card->dev->features |= NETIF_F_SG;
1952 card->dev->hw_features |= NETIF_F_TSO |
1953 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1954 card->dev->vlan_features |= NETIF_F_TSO |
1955 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1956 }
1957
1958 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1959 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1960 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1961 }
1962 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1963 card->dev->hw_features |= NETIF_F_TSO6;
1964 card->dev->vlan_features |= NETIF_F_TSO6;
1965 }
1966
1967 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1968 if (card->dev->hw_features & NETIF_F_TSO6)
1969 headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1970 else if (card->dev->hw_features & NETIF_F_TSO)
1971 headroom = sizeof(struct qeth_hdr_tso);
1972 else
1973 headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1974 } else if (IS_IQD(card)) {
1975 card->dev->flags |= IFF_NOARP;
1976 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1977 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1978
1979 rc = qeth_l3_iqd_read_initial_mac(card);
1980 if (rc)
1981 goto out;
1982 } else
1983 return -ENODEV;
1984
1985 card->dev->needed_headroom = headroom;
1986 card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1987 NETIF_F_HW_VLAN_CTAG_RX |
1988 NETIF_F_HW_VLAN_CTAG_FILTER;
1989
1990 netif_keep_dst(card->dev);
1991 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1992 netif_set_gso_max_size(card->dev,
1993 PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1994
1995 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1996 rc = register_netdev(card->dev);
1997 if (!rc && carrier_ok)
1998 netif_carrier_on(card->dev);
1999
2000 out:
2001 if (rc)
2002 card->dev->netdev_ops = NULL;
2003 return rc;
2004 }
2005
2006 static const struct device_type qeth_l3_devtype = {
2007 .name = "qeth_layer3",
2008 .groups = qeth_l3_attr_groups,
2009 };
2010
2011 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
2012 {
2013 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2014 int rc;
2015
2016 hash_init(card->ip_htable);
2017 mutex_init(&card->ip_lock);
2018 card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
2019 dev_name(&gdev->dev));
2020 if (!card->cmd_wq)
2021 return -ENOMEM;
2022
2023 if (gdev->dev.type == &qeth_generic_devtype) {
2024 rc = qeth_l3_create_device_attributes(&gdev->dev);
2025 if (rc) {
2026 destroy_workqueue(card->cmd_wq);
2027 return rc;
2028 }
2029 }
2030
2031 hash_init(card->ip_mc_htable);
2032 INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
2033 return 0;
2034 }
2035
2036 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2037 {
2038 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2039
2040 if (cgdev->dev.type == &qeth_generic_devtype)
2041 qeth_l3_remove_device_attributes(&cgdev->dev);
2042
2043 qeth_set_allowed_threads(card, 0, 1);
2044 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2045
2046 if (cgdev->state == CCWGROUP_ONLINE)
2047 qeth_l3_set_offline(cgdev);
2048
2049 cancel_work_sync(&card->close_dev_work);
2050 if (qeth_netdev_is_registered(card->dev))
2051 unregister_netdev(card->dev);
2052
2053 flush_workqueue(card->cmd_wq);
2054 destroy_workqueue(card->cmd_wq);
2055 qeth_l3_clear_ip_htable(card, 0);
2056 qeth_l3_clear_ipato_list(card);
2057 }
2058
2059 static int qeth_l3_set_online(struct ccwgroup_device *gdev)
2060 {
2061 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2062 struct net_device *dev = card->dev;
2063 int rc = 0;
2064 bool carrier_ok;
2065
2066 mutex_lock(&card->discipline_mutex);
2067 mutex_lock(&card->conf_mutex);
2068 QETH_CARD_TEXT(card, 2, "setonlin");
2069
2070 rc = qeth_core_hardsetup_card(card, &carrier_ok);
2071 if (rc) {
2072 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2073 rc = -ENODEV;
2074 goto out_remove;
2075 }
2076
2077 card->state = CARD_STATE_HARDSETUP;
2078 qeth_print_status_message(card);
2079
2080 /* softsetup */
2081 QETH_CARD_TEXT(card, 2, "softsetp");
2082
2083 rc = qeth_l3_setadapter_parms(card);
2084 if (rc)
2085 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2086 if (!card->options.sniffer) {
2087 rc = qeth_l3_start_ipassists(card);
2088 if (rc) {
2089 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2090 goto out_remove;
2091 }
2092 rc = qeth_l3_setrouting_v4(card);
2093 if (rc)
2094 QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2095 rc = qeth_l3_setrouting_v6(card);
2096 if (rc)
2097 QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2098 }
2099
2100 rc = qeth_init_qdio_queues(card);
2101 if (rc) {
2102 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2103 rc = -ENODEV;
2104 goto out_remove;
2105 }
2106 card->state = CARD_STATE_SOFTSETUP;
2107
2108 qeth_set_allowed_threads(card, 0xffffffff, 0);
2109 qeth_l3_recover_ip(card);
2110
2111 if (!qeth_netdev_is_registered(dev)) {
2112 rc = qeth_l3_setup_netdev(card, carrier_ok);
2113 if (rc)
2114 goto out_remove;
2115 } else {
2116 rtnl_lock();
2117 if (carrier_ok)
2118 netif_carrier_on(dev);
2119 else
2120 netif_carrier_off(dev);
2121
2122 netif_device_attach(dev);
2123 qeth_enable_hw_features(dev);
2124
2125 if (card->info.open_when_online) {
2126 card->info.open_when_online = 0;
2127 dev_open(dev, NULL);
2128 }
2129 rtnl_unlock();
2130 }
2131 qeth_trace_features(card);
2132 /* let user_space know that device is online */
2133 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2134 mutex_unlock(&card->conf_mutex);
2135 mutex_unlock(&card->discipline_mutex);
2136 return 0;
2137 out_remove:
2138 qeth_l3_stop_card(card);
2139 qeth_stop_channel(&card->data);
2140 qeth_stop_channel(&card->write);
2141 qeth_stop_channel(&card->read);
2142 qdio_free(CARD_DDEV(card));
2143
2144 mutex_unlock(&card->conf_mutex);
2145 mutex_unlock(&card->discipline_mutex);
2146 return rc;
2147 }
2148
2149 static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
2150 int recovery_mode)
2151 {
2152 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2153 int rc = 0, rc2 = 0, rc3 = 0;
2154
2155 mutex_lock(&card->discipline_mutex);
2156 mutex_lock(&card->conf_mutex);
2157 QETH_CARD_TEXT(card, 3, "setoffl");
2158
2159 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
2160 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2161 card->info.hwtrap = 1;
2162 }
2163
2164 rtnl_lock();
2165 card->info.open_when_online = card->dev->flags & IFF_UP;
2166 dev_close(card->dev);
2167 netif_device_detach(card->dev);
2168 netif_carrier_off(card->dev);
2169 rtnl_unlock();
2170
2171 qeth_l3_stop_card(card);
2172 rc = qeth_stop_channel(&card->data);
2173 rc2 = qeth_stop_channel(&card->write);
2174 rc3 = qeth_stop_channel(&card->read);
2175 if (!rc)
2176 rc = (rc2) ? rc2 : rc3;
2177 if (rc)
2178 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2179 qdio_free(CARD_DDEV(card));
2180
2181 /* let user_space know that device is offline */
2182 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
2183 mutex_unlock(&card->conf_mutex);
2184 mutex_unlock(&card->discipline_mutex);
2185 return 0;
2186 }
2187
2188 static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
2189 {
2190 return __qeth_l3_set_offline(cgdev, 0);
2191 }
2192
2193 static int qeth_l3_recover(void *ptr)
2194 {
2195 struct qeth_card *card;
2196 int rc = 0;
2197
2198 card = (struct qeth_card *) ptr;
2199 QETH_CARD_TEXT(card, 2, "recover1");
2200 QETH_CARD_HEX(card, 2, &card, sizeof(void *));
2201 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
2202 return 0;
2203 QETH_CARD_TEXT(card, 2, "recover2");
2204 dev_warn(&card->gdev->dev,
2205 "A recovery process has been started for the device\n");
2206 __qeth_l3_set_offline(card->gdev, 1);
2207 rc = qeth_l3_set_online(card->gdev);
2208 if (!rc)
2209 dev_info(&card->gdev->dev,
2210 "Device successfully recovered!\n");
2211 else {
2212 ccwgroup_set_offline(card->gdev);
2213 dev_warn(&card->gdev->dev, "The qeth device driver "
2214 "failed to recover an error on the device\n");
2215 }
2216 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
2217 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
2218 return 0;
2219 }
2220
2221 /* Returns zero if the command is successfully "consumed" */
2222 static int qeth_l3_control_event(struct qeth_card *card,
2223 struct qeth_ipa_cmd *cmd)
2224 {
2225 return 1;
2226 }
2227
2228 struct qeth_discipline qeth_l3_discipline = {
2229 .devtype = &qeth_l3_devtype,
2230 .recover = qeth_l3_recover,
2231 .setup = qeth_l3_probe_device,
2232 .remove = qeth_l3_remove_device,
2233 .set_online = qeth_l3_set_online,
2234 .set_offline = qeth_l3_set_offline,
2235 .do_ioctl = qeth_l3_do_ioctl,
2236 .control_event_handler = qeth_l3_control_event,
2237 };
2238 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2239
2240 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2241 struct qeth_ipaddr *addr,
2242 unsigned long event)
2243 {
2244 switch (event) {
2245 case NETDEV_UP:
2246 qeth_l3_modify_ip(card, addr, true);
2247 return NOTIFY_OK;
2248 case NETDEV_DOWN:
2249 qeth_l3_modify_ip(card, addr, false);
2250 return NOTIFY_OK;
2251 default:
2252 return NOTIFY_DONE;
2253 }
2254 }
2255
2256 struct qeth_l3_ip_event_work {
2257 struct work_struct work;
2258 struct qeth_card *card;
2259 struct qeth_ipaddr addr;
2260 };
2261
2262 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2263
2264 static void qeth_l3_add_ip_worker(struct work_struct *work)
2265 {
2266 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2267
2268 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2269 kfree(work);
2270 }
2271
2272 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2273 {
2274 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2275
2276 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2277 kfree(work);
2278 }
2279
2280 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2281 {
2282 if (is_vlan_dev(dev))
2283 dev = vlan_dev_real_dev(dev);
2284 if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2285 dev->netdev_ops == &qeth_l3_netdev_ops)
2286 return (struct qeth_card *) dev->ml_priv;
2287 return NULL;
2288 }
2289
2290 static int qeth_l3_ip_event(struct notifier_block *this,
2291 unsigned long event, void *ptr)
2292 {
2293
2294 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2295 struct net_device *dev = ifa->ifa_dev->dev;
2296 struct qeth_ipaddr addr;
2297 struct qeth_card *card;
2298
2299 if (dev_net(dev) != &init_net)
2300 return NOTIFY_DONE;
2301
2302 card = qeth_l3_get_card_from_dev(dev);
2303 if (!card)
2304 return NOTIFY_DONE;
2305 QETH_CARD_TEXT(card, 3, "ipevent");
2306
2307 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2308 addr.u.a4.addr = ifa->ifa_address;
2309 addr.u.a4.mask = ifa->ifa_mask;
2310
2311 return qeth_l3_handle_ip_event(card, &addr, event);
2312 }
2313
2314 static struct notifier_block qeth_l3_ip_notifier = {
2315 qeth_l3_ip_event,
2316 NULL,
2317 };
2318
2319 static int qeth_l3_ip6_event(struct notifier_block *this,
2320 unsigned long event, void *ptr)
2321 {
2322 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2323 struct net_device *dev = ifa->idev->dev;
2324 struct qeth_l3_ip_event_work *ip_work;
2325 struct qeth_card *card;
2326
2327 if (event != NETDEV_UP && event != NETDEV_DOWN)
2328 return NOTIFY_DONE;
2329
2330 card = qeth_l3_get_card_from_dev(dev);
2331 if (!card)
2332 return NOTIFY_DONE;
2333 QETH_CARD_TEXT(card, 3, "ip6event");
2334 if (!qeth_is_supported(card, IPA_IPV6))
2335 return NOTIFY_DONE;
2336
2337 ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2338 if (!ip_work)
2339 return NOTIFY_DONE;
2340
2341 if (event == NETDEV_UP)
2342 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2343 else
2344 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2345
2346 ip_work->card = card;
2347 qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2348 QETH_PROT_IPV6);
2349 ip_work->addr.u.a6.addr = ifa->addr;
2350 ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2351
2352 queue_work(card->cmd_wq, &ip_work->work);
2353 return NOTIFY_OK;
2354 }
2355
2356 static struct notifier_block qeth_l3_ip6_notifier = {
2357 qeth_l3_ip6_event,
2358 NULL,
2359 };
2360
2361 static int qeth_l3_register_notifiers(void)
2362 {
2363 int rc;
2364
2365 QETH_DBF_TEXT(SETUP, 5, "regnotif");
2366 rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2367 if (rc)
2368 return rc;
2369 rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2370 if (rc) {
2371 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2372 return rc;
2373 }
2374 return 0;
2375 }
2376
2377 static void qeth_l3_unregister_notifiers(void)
2378 {
2379 QETH_DBF_TEXT(SETUP, 5, "unregnot");
2380 WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2381 WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2382 }
2383
2384 static int __init qeth_l3_init(void)
2385 {
2386 pr_info("register layer 3 discipline\n");
2387 return qeth_l3_register_notifiers();
2388 }
2389
2390 static void __exit qeth_l3_exit(void)
2391 {
2392 qeth_l3_unregister_notifiers();
2393 pr_info("unregister layer 3 discipline\n");
2394 }
2395
2396 module_init(qeth_l3_init);
2397 module_exit(qeth_l3_exit);
2398 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2399 MODULE_DESCRIPTION("qeth layer 3 discipline");
2400 MODULE_LICENSE("GPL");
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