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 pr_fmt(fmt) "qeth: " fmt
11
12#include <linux/export.h>
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/inet.h>
23#include <linux/ipv6.h>
24#include <linux/inetdevice.h>
25#include <linux/igmp.h>
26#include <linux/slab.h>
27#include <linux/if_ether.h>
28#include <linux/if_vlan.h>
29#include <linux/skbuff.h>
30
31#include <net/ip.h>
32#include <net/arp.h>
33#include <net/route.h>
34#include <net/ipv6.h>
35#include <net/ip6_route.h>
36#include <net/iucv/af_iucv.h>
37#include <linux/hashtable.h>
38
39#include "qeth_l3.h"
40
41static int qeth_l3_register_addr_entry(struct qeth_card *,
42 struct qeth_ipaddr *);
43static int qeth_l3_deregister_addr_entry(struct qeth_card *,
44 struct qeth_ipaddr *);
45
46int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
47 char *buf)
48{
49 if (proto == QETH_PROT_IPV4)
50 return scnprintf(buf, INET_ADDRSTRLEN, fmt: "%pI4", addr);
51 else
52 return scnprintf(buf, INET6_ADDRSTRLEN, fmt: "%pI6", addr);
53}
54
55static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
56 struct qeth_ipaddr *query)
57{
58 u32 key = qeth_l3_ipaddr_hash(addr: query);
59 struct qeth_ipaddr *addr;
60
61 if (query->is_multicast) {
62 hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
63 if (qeth_l3_addr_match_ip(a1: addr, a2: query))
64 return addr;
65 } else {
66 hash_for_each_possible(card->ip_htable, addr, hnode, key)
67 if (qeth_l3_addr_match_ip(a1: addr, a2: query))
68 return addr;
69 }
70 return NULL;
71}
72
73static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
74{
75 int i, j;
76 u8 octet;
77
78 for (i = 0; i < len; ++i) {
79 octet = addr[i];
80 for (j = 7; j >= 0; --j) {
81 bits[i*8 + j] = octet & 1;
82 octet >>= 1;
83 }
84 }
85}
86
87static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
88 struct qeth_ipaddr *addr)
89{
90 struct qeth_ipato_entry *ipatoe;
91 u8 addr_bits[128] = {0, };
92 u8 ipatoe_bits[128] = {0, };
93 int rc = 0;
94
95 if (!card->ipato.enabled)
96 return false;
97 if (addr->type != QETH_IP_TYPE_NORMAL)
98 return false;
99
100 qeth_l3_convert_addr_to_bits(addr: (u8 *) &addr->u, bits: addr_bits,
101 len: (addr->proto == QETH_PROT_IPV4) ? 4 : 16);
102 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
103 if (addr->proto != ipatoe->proto)
104 continue;
105 qeth_l3_convert_addr_to_bits(addr: ipatoe->addr, bits: ipatoe_bits,
106 len: (ipatoe->proto == QETH_PROT_IPV4) ?
107 4 : 16);
108 rc = !memcmp(p: addr_bits, q: ipatoe_bits, size: ipatoe->mask_bits);
109 if (rc)
110 break;
111 }
112 /* invert? */
113 if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
114 rc = !rc;
115 else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
116 rc = !rc;
117
118 return rc;
119}
120
121static int qeth_l3_delete_ip(struct qeth_card *card,
122 struct qeth_ipaddr *tmp_addr)
123{
124 int rc = 0;
125 struct qeth_ipaddr *addr;
126
127 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
128 QETH_CARD_TEXT(card, 2, "delrxip");
129 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
130 QETH_CARD_TEXT(card, 2, "delvipa");
131 else
132 QETH_CARD_TEXT(card, 2, "delip");
133
134 if (tmp_addr->proto == QETH_PROT_IPV4)
135 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
136 else {
137 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
138 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
139 }
140
141 addr = qeth_l3_find_addr_by_ip(card, query: tmp_addr);
142 if (!addr || !qeth_l3_addr_match_all(a1: addr, a2: tmp_addr))
143 return -ENOENT;
144
145 addr->ref_counter--;
146 if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
147 return rc;
148
149 if (qeth_card_hw_is_reachable(card))
150 rc = qeth_l3_deregister_addr_entry(card, addr);
151
152 hash_del(node: &addr->hnode);
153 kfree(objp: addr);
154
155 return rc;
156}
157
158static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
159{
160 int rc = 0;
161 struct qeth_ipaddr *addr;
162 char buf[INET6_ADDRSTRLEN];
163
164 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
165 QETH_CARD_TEXT(card, 2, "addrxip");
166 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
167 QETH_CARD_TEXT(card, 2, "addvipa");
168 else
169 QETH_CARD_TEXT(card, 2, "addip");
170
171 if (tmp_addr->proto == QETH_PROT_IPV4)
172 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
173 else {
174 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
175 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
176 }
177
178 addr = qeth_l3_find_addr_by_ip(card, query: tmp_addr);
179 if (addr) {
180 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
181 return -EADDRINUSE;
182 if (qeth_l3_addr_match_all(a1: addr, a2: tmp_addr)) {
183 addr->ref_counter++;
184 return 0;
185 }
186 qeth_l3_ipaddr_to_string(proto: tmp_addr->proto, addr: (u8 *)&tmp_addr->u,
187 buf);
188 dev_warn(&card->gdev->dev,
189 "Registering IP address %s failed\n", buf);
190 return -EADDRINUSE;
191 } else {
192 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
193 if (!addr)
194 return -ENOMEM;
195
196 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
197 QETH_CARD_TEXT(card, 2, "tkovaddr");
198 addr->ipato = 1;
199 }
200 hash_add(card->ip_htable, &addr->hnode,
201 qeth_l3_ipaddr_hash(addr));
202
203 if (!qeth_card_hw_is_reachable(card)) {
204 addr->disp_flag = QETH_DISP_ADDR_ADD;
205 return 0;
206 }
207
208 rc = qeth_l3_register_addr_entry(card, addr);
209
210 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
211 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
212 } else {
213 hash_del(node: &addr->hnode);
214 kfree(objp: addr);
215 }
216 }
217 return rc;
218}
219
220static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
221 bool add)
222{
223 int rc;
224
225 mutex_lock(&card->ip_lock);
226 rc = add ? qeth_l3_add_ip(card, tmp_addr: addr) : qeth_l3_delete_ip(card, tmp_addr: addr);
227 mutex_unlock(lock: &card->ip_lock);
228
229 return rc;
230}
231
232static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
233{
234 struct qeth_ipaddr *addr;
235 struct hlist_node *tmp;
236 int i;
237
238 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
239 hash_del(node: &addr->hnode);
240 kfree(objp: addr);
241 }
242}
243
244static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
245{
246 struct qeth_ipaddr *addr;
247 struct hlist_node *tmp;
248 int i;
249
250 QETH_CARD_TEXT(card, 4, "clearip");
251
252 mutex_lock(&card->ip_lock);
253
254 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
255 if (!recover) {
256 hash_del(node: &addr->hnode);
257 kfree(objp: addr);
258 } else {
259 /* prepare for recovery */
260 addr->disp_flag = QETH_DISP_ADDR_ADD;
261 }
262 }
263
264 mutex_unlock(lock: &card->ip_lock);
265}
266
267static void qeth_l3_recover_ip(struct qeth_card *card)
268{
269 struct qeth_ipaddr *addr;
270 struct hlist_node *tmp;
271 int i;
272 int rc;
273
274 QETH_CARD_TEXT(card, 4, "recovrip");
275
276 mutex_lock(&card->ip_lock);
277
278 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
279 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
280 rc = qeth_l3_register_addr_entry(card, addr);
281
282 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
283 /* keep it in the records */
284 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
285 } else {
286 /* bad address */
287 hash_del(node: &addr->hnode);
288 kfree(objp: addr);
289 }
290 }
291 }
292
293 mutex_unlock(lock: &card->ip_lock);
294}
295
296static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
297 unsigned long data)
298{
299 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
300
301 switch (cmd->hdr.return_code) {
302 case IPA_RC_SUCCESS:
303 return 0;
304 case IPA_RC_DUPLICATE_IP_ADDRESS:
305 return -EADDRINUSE;
306 case IPA_RC_MC_ADDR_NOT_FOUND:
307 return -ENOENT;
308 case IPA_RC_LAN_OFFLINE:
309 return -ENETDOWN;
310 default:
311 return -EIO;
312 }
313}
314
315static int qeth_l3_send_setdelmc(struct qeth_card *card,
316 struct qeth_ipaddr *addr,
317 enum qeth_ipa_cmds ipacmd)
318{
319 struct qeth_cmd_buffer *iob;
320 struct qeth_ipa_cmd *cmd;
321
322 QETH_CARD_TEXT(card, 4, "setdelmc");
323
324 iob = qeth_ipa_alloc_cmd(card, cmd_code: ipacmd, prot: addr->proto,
325 IPA_DATA_SIZEOF(setdelipm));
326 if (!iob)
327 return -ENOMEM;
328 cmd = __ipa_cmd(iob);
329 if (addr->proto == QETH_PROT_IPV6) {
330 cmd->data.setdelipm.ip = addr->u.a6.addr;
331 ipv6_eth_mc_map(addr: &addr->u.a6.addr, buf: cmd->data.setdelipm.mac);
332 } else {
333 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
334 ip_eth_mc_map(naddr: addr->u.a4.addr, buf: cmd->data.setdelipm.mac);
335 }
336
337 return qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_setdelip_cb, NULL);
338}
339
340static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
341{
342 unsigned int i = 0;
343
344 while (len && i < 4) {
345 int mask_len = min_t(int, len, 32);
346
347 prefix->s6_addr32[i] = inet_make_mask(logmask: mask_len);
348 len -= mask_len;
349 i++;
350 }
351}
352
353static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
354{
355 switch (addr->type) {
356 case QETH_IP_TYPE_RXIP:
357 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
358 case QETH_IP_TYPE_VIPA:
359 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
360 QETH_IPA_DELIP_VIPA_FLAG;
361 default:
362 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
363 }
364}
365
366static int qeth_l3_send_setdelip(struct qeth_card *card,
367 struct qeth_ipaddr *addr,
368 enum qeth_ipa_cmds ipacmd)
369{
370 struct qeth_cmd_buffer *iob;
371 struct qeth_ipa_cmd *cmd;
372 u32 flags;
373
374 QETH_CARD_TEXT(card, 4, "setdelip");
375
376 iob = qeth_ipa_alloc_cmd(card, cmd_code: ipacmd, prot: addr->proto,
377 IPA_DATA_SIZEOF(setdelip6));
378 if (!iob)
379 return -ENOMEM;
380 cmd = __ipa_cmd(iob);
381
382 flags = qeth_l3_get_setdelip_flags(addr, set: ipacmd == IPA_CMD_SETIP);
383 QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
384
385 if (addr->proto == QETH_PROT_IPV6) {
386 cmd->data.setdelip6.addr = addr->u.a6.addr;
387 qeth_l3_set_ipv6_prefix(prefix: &cmd->data.setdelip6.prefix,
388 len: addr->u.a6.pfxlen);
389 cmd->data.setdelip6.flags = flags;
390 } else {
391 cmd->data.setdelip4.addr = addr->u.a4.addr;
392 cmd->data.setdelip4.mask = addr->u.a4.mask;
393 cmd->data.setdelip4.flags = flags;
394 }
395
396 return qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_setdelip_cb, NULL);
397}
398
399static int qeth_l3_send_setrouting(struct qeth_card *card,
400 enum qeth_routing_types type, enum qeth_prot_versions prot)
401{
402 int rc;
403 struct qeth_ipa_cmd *cmd;
404 struct qeth_cmd_buffer *iob;
405
406 QETH_CARD_TEXT(card, 4, "setroutg");
407 iob = qeth_ipa_alloc_cmd(card, cmd_code: IPA_CMD_SETRTG, prot,
408 IPA_DATA_SIZEOF(setrtg));
409 if (!iob)
410 return -ENOMEM;
411 cmd = __ipa_cmd(iob);
412 cmd->data.setrtg.type = (type);
413 rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
414
415 return rc;
416}
417
418static int qeth_l3_correct_routing_type(struct qeth_card *card,
419 enum qeth_routing_types *type, enum qeth_prot_versions prot)
420{
421 if (IS_IQD(card)) {
422 switch (*type) {
423 case NO_ROUTER:
424 case PRIMARY_CONNECTOR:
425 case SECONDARY_CONNECTOR:
426 case MULTICAST_ROUTER:
427 return 0;
428 default:
429 goto out_inval;
430 }
431 } else {
432 switch (*type) {
433 case NO_ROUTER:
434 case PRIMARY_ROUTER:
435 case SECONDARY_ROUTER:
436 return 0;
437 case MULTICAST_ROUTER:
438 if (qeth_is_ipafunc_supported(card, prot,
439 IPA_OSA_MC_ROUTER))
440 return 0;
441 goto out_inval;
442 default:
443 goto out_inval;
444 }
445 }
446out_inval:
447 *type = NO_ROUTER;
448 return -EINVAL;
449}
450
451int qeth_l3_setrouting_v4(struct qeth_card *card)
452{
453 int rc;
454
455 QETH_CARD_TEXT(card, 3, "setrtg4");
456
457 rc = qeth_l3_correct_routing_type(card, type: &card->options.route4.type,
458 prot: QETH_PROT_IPV4);
459 if (rc)
460 return rc;
461
462 rc = qeth_l3_send_setrouting(card, type: card->options.route4.type,
463 prot: QETH_PROT_IPV4);
464 if (rc) {
465 card->options.route4.type = NO_ROUTER;
466 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
467 rc, CARD_DEVID(card));
468 }
469 return rc;
470}
471
472int qeth_l3_setrouting_v6(struct qeth_card *card)
473{
474 int rc = 0;
475
476 QETH_CARD_TEXT(card, 3, "setrtg6");
477
478 if (!qeth_is_supported(card, IPA_IPV6))
479 return 0;
480 rc = qeth_l3_correct_routing_type(card, type: &card->options.route6.type,
481 prot: QETH_PROT_IPV6);
482 if (rc)
483 return rc;
484
485 rc = qeth_l3_send_setrouting(card, type: card->options.route6.type,
486 prot: QETH_PROT_IPV6);
487 if (rc) {
488 card->options.route6.type = NO_ROUTER;
489 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
490 rc, CARD_DEVID(card));
491 }
492 return rc;
493}
494
495/*
496 * IP address takeover related functions
497 */
498
499/*
500 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
501 *
502 * Caller must hold ip_lock.
503 */
504void qeth_l3_update_ipato(struct qeth_card *card)
505{
506 struct qeth_ipaddr *addr;
507 unsigned int i;
508
509 hash_for_each(card->ip_htable, i, addr, hnode) {
510 if (addr->type != QETH_IP_TYPE_NORMAL)
511 continue;
512 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
513 }
514}
515
516static void qeth_l3_clear_ipato_list(struct qeth_card *card)
517{
518 struct qeth_ipato_entry *ipatoe, *tmp;
519
520 mutex_lock(&card->ip_lock);
521
522 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
523 list_del(entry: &ipatoe->entry);
524 kfree(objp: ipatoe);
525 }
526
527 qeth_l3_update_ipato(card);
528 mutex_unlock(lock: &card->ip_lock);
529}
530
531int qeth_l3_add_ipato_entry(struct qeth_card *card,
532 struct qeth_ipato_entry *new)
533{
534 struct qeth_ipato_entry *ipatoe;
535 int rc = 0;
536
537 QETH_CARD_TEXT(card, 2, "addipato");
538
539 mutex_lock(&card->ip_lock);
540
541 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
542 if (ipatoe->proto != new->proto)
543 continue;
544 if (!memcmp(p: ipatoe->addr, q: new->addr,
545 size: (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
546 (ipatoe->mask_bits == new->mask_bits)) {
547 rc = -EEXIST;
548 break;
549 }
550 }
551
552 if (!rc) {
553 list_add_tail(new: &new->entry, head: &card->ipato.entries);
554 qeth_l3_update_ipato(card);
555 }
556
557 mutex_unlock(lock: &card->ip_lock);
558
559 return rc;
560}
561
562int qeth_l3_del_ipato_entry(struct qeth_card *card,
563 enum qeth_prot_versions proto, u8 *addr,
564 unsigned int mask_bits)
565{
566 struct qeth_ipato_entry *ipatoe, *tmp;
567 int rc = -ENOENT;
568
569 QETH_CARD_TEXT(card, 2, "delipato");
570
571 mutex_lock(&card->ip_lock);
572
573 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
574 if (ipatoe->proto != proto)
575 continue;
576 if (!memcmp(p: ipatoe->addr, q: addr,
577 size: (proto == QETH_PROT_IPV4) ? 4 : 16) &&
578 (ipatoe->mask_bits == mask_bits)) {
579 list_del(entry: &ipatoe->entry);
580 qeth_l3_update_ipato(card);
581 kfree(objp: ipatoe);
582 rc = 0;
583 }
584 }
585
586 mutex_unlock(lock: &card->ip_lock);
587
588 return rc;
589}
590
591int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
592 enum qeth_ip_types type,
593 enum qeth_prot_versions proto)
594{
595 struct qeth_ipaddr addr;
596
597 qeth_l3_init_ipaddr(addr: &addr, type, proto);
598 if (proto == QETH_PROT_IPV4)
599 memcpy(&addr.u.a4.addr, ip, 4);
600 else
601 memcpy(&addr.u.a6.addr, ip, 16);
602
603 return qeth_l3_modify_ip(card, addr: &addr, add);
604}
605
606int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
607{
608 struct qeth_ipaddr addr;
609 unsigned int i;
610
611 qeth_l3_init_ipaddr(addr: &addr, type: QETH_IP_TYPE_NORMAL, proto: QETH_PROT_IPV6);
612 addr.u.a6.addr.s6_addr[0] = 0xfe;
613 addr.u.a6.addr.s6_addr[1] = 0x80;
614 for (i = 0; i < 8; i++)
615 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
616
617 return qeth_l3_modify_ip(card, addr: &addr, add);
618}
619
620static int qeth_l3_register_addr_entry(struct qeth_card *card,
621 struct qeth_ipaddr *addr)
622{
623 char buf[50];
624 int rc = 0;
625 int cnt = 3;
626
627 if (card->options.sniffer)
628 return 0;
629
630 if (addr->proto == QETH_PROT_IPV4) {
631 QETH_CARD_TEXT(card, 2, "setaddr4");
632 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
633 } else if (addr->proto == QETH_PROT_IPV6) {
634 QETH_CARD_TEXT(card, 2, "setaddr6");
635 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
636 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
637 } else {
638 QETH_CARD_TEXT(card, 2, "setaddr?");
639 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
640 }
641 do {
642 if (addr->is_multicast)
643 rc = qeth_l3_send_setdelmc(card, addr, ipacmd: IPA_CMD_SETIPM);
644 else
645 rc = qeth_l3_send_setdelip(card, addr, ipacmd: IPA_CMD_SETIP);
646 if (rc)
647 QETH_CARD_TEXT(card, 2, "failed");
648 } while ((--cnt > 0) && rc);
649 if (rc) {
650 QETH_CARD_TEXT(card, 2, "FAILED");
651 qeth_l3_ipaddr_to_string(proto: addr->proto, addr: (u8 *)&addr->u, buf);
652 dev_warn(&card->gdev->dev,
653 "Registering IP address %s failed\n", buf);
654 }
655 return rc;
656}
657
658static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
659 struct qeth_ipaddr *addr)
660{
661 int rc = 0;
662
663 if (card->options.sniffer)
664 return 0;
665
666 if (addr->proto == QETH_PROT_IPV4) {
667 QETH_CARD_TEXT(card, 2, "deladdr4");
668 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
669 } else if (addr->proto == QETH_PROT_IPV6) {
670 QETH_CARD_TEXT(card, 2, "deladdr6");
671 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
672 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
673 } else {
674 QETH_CARD_TEXT(card, 2, "deladdr?");
675 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
676 }
677 if (addr->is_multicast)
678 rc = qeth_l3_send_setdelmc(card, addr, ipacmd: IPA_CMD_DELIPM);
679 else
680 rc = qeth_l3_send_setdelip(card, addr, ipacmd: IPA_CMD_DELIP);
681 if (rc)
682 QETH_CARD_TEXT(card, 2, "failed");
683
684 return rc;
685}
686
687static int qeth_l3_setadapter_parms(struct qeth_card *card)
688{
689 int rc = 0;
690
691 QETH_CARD_TEXT(card, 2, "setadprm");
692
693 if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
694 rc = qeth_setadpparms_change_macaddr(card);
695 if (rc)
696 dev_warn(&card->gdev->dev, "Reading the adapter MAC"
697 " address failed\n");
698 }
699
700 return rc;
701}
702
703static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
704{
705 int rc;
706
707 QETH_CARD_TEXT(card, 3, "ipaarp");
708
709 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
710 dev_info(&card->gdev->dev,
711 "ARP processing not supported on %s!\n",
712 netdev_name(card->dev));
713 return 0;
714 }
715 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_ARP_PROCESSING,
716 cmd_code: IPA_CMD_ASS_START, NULL);
717 if (rc) {
718 dev_warn(&card->gdev->dev,
719 "Starting ARP processing support for %s failed\n",
720 netdev_name(card->dev));
721 }
722 return rc;
723}
724
725static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
726{
727 int rc;
728
729 QETH_CARD_TEXT(card, 3, "stsrcmac");
730
731 if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
732 dev_info(&card->gdev->dev,
733 "Inbound source MAC-address not supported on %s\n",
734 netdev_name(card->dev));
735 return -EOPNOTSUPP;
736 }
737
738 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_SOURCE_MAC,
739 cmd_code: IPA_CMD_ASS_START, NULL);
740 if (rc)
741 dev_warn(&card->gdev->dev,
742 "Starting source MAC-address support for %s failed\n",
743 netdev_name(card->dev));
744 return rc;
745}
746
747static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
748{
749 int rc = 0;
750
751 QETH_CARD_TEXT(card, 3, "strtvlan");
752
753 if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
754 dev_info(&card->gdev->dev,
755 "VLAN not supported on %s\n", netdev_name(card->dev));
756 return -EOPNOTSUPP;
757 }
758
759 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_VLAN_PRIO,
760 cmd_code: IPA_CMD_ASS_START, NULL);
761 if (rc) {
762 dev_warn(&card->gdev->dev,
763 "Starting VLAN support for %s failed\n",
764 netdev_name(card->dev));
765 } else {
766 dev_info(&card->gdev->dev, "VLAN enabled\n");
767 }
768 return rc;
769}
770
771static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
772{
773 int rc;
774
775 QETH_CARD_TEXT(card, 3, "stmcast");
776
777 if (!qeth_is_supported(card, IPA_MULTICASTING)) {
778 dev_info(&card->gdev->dev,
779 "Multicast not supported on %s\n",
780 netdev_name(card->dev));
781 return -EOPNOTSUPP;
782 }
783
784 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_MULTICASTING,
785 cmd_code: IPA_CMD_ASS_START, NULL);
786 if (rc) {
787 dev_warn(&card->gdev->dev,
788 "Starting multicast support for %s failed\n",
789 netdev_name(card->dev));
790 } else {
791 dev_info(&card->gdev->dev, "Multicast enabled\n");
792 card->dev->flags |= IFF_MULTICAST;
793 }
794 return rc;
795}
796
797static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
798{
799 u32 ipv6_data = 3;
800 int rc;
801
802 QETH_CARD_TEXT(card, 3, "softipv6");
803
804 if (IS_IQD(card))
805 goto out;
806
807 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_IPV6, cmd_code: IPA_CMD_ASS_START,
808 data: &ipv6_data);
809 if (rc) {
810 dev_err(&card->gdev->dev,
811 "Activating IPv6 support for %s failed\n",
812 netdev_name(card->dev));
813 return rc;
814 }
815 rc = qeth_send_simple_setassparms_v6(card, ipa_func: IPA_IPV6, cmd_code: IPA_CMD_ASS_START,
816 NULL);
817 if (rc) {
818 dev_err(&card->gdev->dev,
819 "Activating IPv6 support for %s failed\n",
820 netdev_name(card->dev));
821 return rc;
822 }
823 rc = qeth_send_simple_setassparms_v6(card, ipa_func: IPA_PASSTHRU,
824 cmd_code: IPA_CMD_ASS_START, NULL);
825 if (rc) {
826 dev_warn(&card->gdev->dev,
827 "Enabling the passthrough mode for %s failed\n",
828 netdev_name(card->dev));
829 return rc;
830 }
831out:
832 dev_info(&card->gdev->dev, "IPV6 enabled\n");
833 return 0;
834}
835
836static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
837{
838 QETH_CARD_TEXT(card, 3, "strtipv6");
839
840 if (!qeth_is_supported(card, IPA_IPV6)) {
841 dev_info(&card->gdev->dev,
842 "IPv6 not supported on %s\n", netdev_name(card->dev));
843 return 0;
844 }
845 return qeth_l3_softsetup_ipv6(card);
846}
847
848static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
849{
850 u32 filter_data = 1;
851 int rc;
852
853 QETH_CARD_TEXT(card, 3, "stbrdcst");
854 card->info.broadcast_capable = 0;
855 if (!qeth_is_supported(card, IPA_FILTERING)) {
856 dev_info(&card->gdev->dev,
857 "Broadcast not supported on %s\n",
858 netdev_name(card->dev));
859 rc = -EOPNOTSUPP;
860 goto out;
861 }
862 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_FILTERING,
863 cmd_code: IPA_CMD_ASS_START, NULL);
864 if (rc) {
865 dev_warn(&card->gdev->dev,
866 "Enabling broadcast filtering for %s failed\n",
867 netdev_name(card->dev));
868 goto out;
869 }
870
871 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_FILTERING,
872 cmd_code: IPA_CMD_ASS_CONFIGURE, data: &filter_data);
873 if (rc) {
874 dev_warn(&card->gdev->dev,
875 "Setting up broadcast filtering for %s failed\n",
876 netdev_name(card->dev));
877 goto out;
878 }
879 card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
880 dev_info(&card->gdev->dev, "Broadcast enabled\n");
881 rc = qeth_send_simple_setassparms(card, ipa_func: IPA_FILTERING,
882 cmd_code: IPA_CMD_ASS_ENABLE, data: &filter_data);
883 if (rc) {
884 dev_warn(&card->gdev->dev,
885 "Setting up broadcast echo filtering for %s failed\n",
886 netdev_name(card->dev));
887 goto out;
888 }
889 card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
890out:
891 if (card->info.broadcast_capable)
892 card->dev->flags |= IFF_BROADCAST;
893 else
894 card->dev->flags &= ~IFF_BROADCAST;
895 return rc;
896}
897
898static void qeth_l3_start_ipassists(struct qeth_card *card)
899{
900 QETH_CARD_TEXT(card, 3, "strtipas");
901
902 qeth_l3_start_ipa_arp_processing(card); /* go on*/
903 qeth_l3_start_ipa_source_mac(card); /* go on*/
904 qeth_l3_start_ipa_vlan(card); /* go on*/
905 qeth_l3_start_ipa_multicast(card); /* go on*/
906 qeth_l3_start_ipa_ipv6(card); /* go on*/
907 qeth_l3_start_ipa_broadcast(card); /* go on*/
908}
909
910static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
911 struct qeth_reply *reply, unsigned long data)
912{
913 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
914
915 if (cmd->hdr.return_code)
916 return -EIO;
917 if (!is_valid_ether_addr(addr: cmd->data.create_destroy_addr.mac_addr))
918 return -EADDRNOTAVAIL;
919
920 eth_hw_addr_set(dev: card->dev, addr: cmd->data.create_destroy_addr.mac_addr);
921 return 0;
922}
923
924static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
925{
926 int rc = 0;
927 struct qeth_cmd_buffer *iob;
928
929 QETH_CARD_TEXT(card, 2, "hsrmac");
930
931 iob = qeth_ipa_alloc_cmd(card, cmd_code: IPA_CMD_CREATE_ADDR, prot: QETH_PROT_IPV6,
932 IPA_DATA_SIZEOF(create_destroy_addr));
933 if (!iob)
934 return -ENOMEM;
935
936 rc = qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_iqd_read_initial_mac_cb,
937 NULL);
938 return rc;
939}
940
941static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
942 struct qeth_reply *reply, unsigned long data)
943{
944 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
945 u16 *uid = reply->param;
946
947 if (cmd->hdr.return_code == 0) {
948 *uid = cmd->data.create_destroy_addr.uid;
949 return 0;
950 }
951
952 dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
953 return -EIO;
954}
955
956static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
957{
958 struct qeth_cmd_buffer *iob;
959
960 QETH_CARD_TEXT(card, 2, "guniqeid");
961
962 if (!qeth_is_supported(card, IPA_IPV6))
963 goto out;
964
965 iob = qeth_ipa_alloc_cmd(card, cmd_code: IPA_CMD_CREATE_ADDR, prot: QETH_PROT_IPV6,
966 IPA_DATA_SIZEOF(create_destroy_addr));
967 if (!iob)
968 goto out;
969
970 __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
971 qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_get_unique_id_cb, &uid);
972
973out:
974 return uid;
975}
976
977static int
978qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
979 unsigned long data)
980{
981 struct qeth_ipa_cmd *cmd;
982 __u16 rc;
983
984 QETH_CARD_TEXT(card, 2, "diastrcb");
985
986 cmd = (struct qeth_ipa_cmd *)data;
987 rc = cmd->hdr.return_code;
988 if (rc)
989 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
990 switch (cmd->data.diagass.action) {
991 case QETH_DIAGS_CMD_TRACE_QUERY:
992 break;
993 case QETH_DIAGS_CMD_TRACE_DISABLE:
994 switch (rc) {
995 case 0:
996 case IPA_RC_INVALID_SUBCMD:
997 card->info.promisc_mode = SET_PROMISC_MODE_OFF;
998 dev_info(&card->gdev->dev, "The HiperSockets network "
999 "traffic analyzer is deactivated\n");
1000 break;
1001 default:
1002 break;
1003 }
1004 break;
1005 case QETH_DIAGS_CMD_TRACE_ENABLE:
1006 switch (rc) {
1007 case 0:
1008 card->info.promisc_mode = SET_PROMISC_MODE_ON;
1009 dev_info(&card->gdev->dev, "The HiperSockets network "
1010 "traffic analyzer is activated\n");
1011 break;
1012 case IPA_RC_HARDWARE_AUTH_ERROR:
1013 dev_warn(&card->gdev->dev, "The device is not "
1014 "authorized to run as a HiperSockets network "
1015 "traffic analyzer\n");
1016 break;
1017 case IPA_RC_TRACE_ALREADY_ACTIVE:
1018 dev_warn(&card->gdev->dev, "A HiperSockets "
1019 "network traffic analyzer is already "
1020 "active in the HiperSockets LAN\n");
1021 break;
1022 default:
1023 break;
1024 }
1025 break;
1026 default:
1027 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1028 cmd->data.diagass.action, CARD_DEVID(card));
1029 }
1030
1031 return rc ? -EIO : 0;
1032}
1033
1034static int
1035qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1036{
1037 struct qeth_cmd_buffer *iob;
1038 struct qeth_ipa_cmd *cmd;
1039
1040 QETH_CARD_TEXT(card, 2, "diagtrac");
1041
1042 iob = qeth_get_diag_cmd(card, sub_cmd: QETH_DIAGS_CMD_TRACE, data_length: 0);
1043 if (!iob)
1044 return -ENOMEM;
1045 cmd = __ipa_cmd(iob);
1046 cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1047 cmd->data.diagass.action = diags_cmd;
1048 return qeth_send_ipa_cmd(card, iob, reply_cb: qeth_diags_trace_cb, NULL);
1049}
1050
1051static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1052{
1053 struct qeth_card *card = arg;
1054 struct inet6_dev *in6_dev;
1055 struct in_device *in4_dev;
1056 struct qeth_ipaddr *ipm;
1057 struct qeth_ipaddr tmp;
1058 struct ip_mc_list *im4;
1059 struct ifmcaddr6 *im6;
1060
1061 QETH_CARD_TEXT(card, 4, "addmc");
1062
1063 if (!dev || !(dev->flags & IFF_UP))
1064 goto out;
1065
1066 in4_dev = __in_dev_get_rtnl(dev);
1067 if (!in4_dev)
1068 goto walk_ipv6;
1069
1070 qeth_l3_init_ipaddr(addr: &tmp, type: QETH_IP_TYPE_NORMAL, proto: QETH_PROT_IPV4);
1071 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1072 tmp.is_multicast = 1;
1073
1074 for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1075 im4 = rtnl_dereference(im4->next_rcu)) {
1076 tmp.u.a4.addr = im4->multiaddr;
1077
1078 ipm = qeth_l3_find_addr_by_ip(card, query: &tmp);
1079 if (ipm) {
1080 /* for mcast, by-IP match means full match */
1081 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1082 continue;
1083 }
1084
1085 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1086 if (!ipm)
1087 continue;
1088
1089 hash_add(card->rx_mode_addrs, &ipm->hnode,
1090 qeth_l3_ipaddr_hash(ipm));
1091 }
1092
1093walk_ipv6:
1094 if (!qeth_is_supported(card, IPA_IPV6))
1095 goto out;
1096
1097 in6_dev = __in6_dev_get(dev);
1098 if (!in6_dev)
1099 goto out;
1100
1101 qeth_l3_init_ipaddr(addr: &tmp, type: QETH_IP_TYPE_NORMAL, proto: QETH_PROT_IPV6);
1102 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1103 tmp.is_multicast = 1;
1104
1105 for (im6 = rtnl_dereference(in6_dev->mc_list);
1106 im6;
1107 im6 = rtnl_dereference(im6->next)) {
1108 tmp.u.a6.addr = im6->mca_addr;
1109
1110 ipm = qeth_l3_find_addr_by_ip(card, query: &tmp);
1111 if (ipm) {
1112 /* for mcast, by-IP match means full match */
1113 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1114 continue;
1115 }
1116
1117 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1118 if (!ipm)
1119 continue;
1120
1121 hash_add(card->rx_mode_addrs, &ipm->hnode,
1122 qeth_l3_ipaddr_hash(ipm));
1123
1124 }
1125
1126out:
1127 return 0;
1128}
1129
1130static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1131{
1132 bool enable = card->dev->flags & IFF_PROMISC;
1133
1134 if (card->info.promisc_mode == enable)
1135 return;
1136
1137 if (IS_VM_NIC(card)) { /* Guestlan trace */
1138 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1139 qeth_setadp_promisc_mode(card, enable);
1140 } else if (card->options.sniffer && /* HiperSockets trace */
1141 qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1142 if (enable) {
1143 QETH_CARD_TEXT(card, 3, "+promisc");
1144 qeth_diags_trace(card, diags_cmd: QETH_DIAGS_CMD_TRACE_ENABLE);
1145 } else {
1146 QETH_CARD_TEXT(card, 3, "-promisc");
1147 qeth_diags_trace(card, diags_cmd: QETH_DIAGS_CMD_TRACE_DISABLE);
1148 }
1149 }
1150}
1151
1152static void qeth_l3_rx_mode_work(struct work_struct *work)
1153{
1154 struct qeth_card *card = container_of(work, struct qeth_card,
1155 rx_mode_work);
1156 struct qeth_ipaddr *addr;
1157 struct hlist_node *tmp;
1158 int i, rc;
1159
1160 QETH_CARD_TEXT(card, 3, "setmulti");
1161
1162 if (!card->options.sniffer) {
1163 rtnl_lock();
1164 qeth_l3_add_mcast_rtnl(dev: card->dev, vid: 0, arg: card);
1165 if (qeth_is_supported(card, IPA_FULL_VLAN))
1166 vlan_for_each(dev: card->dev, action: qeth_l3_add_mcast_rtnl, arg: card);
1167 rtnl_unlock();
1168
1169 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1170 switch (addr->disp_flag) {
1171 case QETH_DISP_ADDR_DELETE:
1172 rc = qeth_l3_deregister_addr_entry(card, addr);
1173 if (!rc || rc == -ENOENT) {
1174 hash_del(node: &addr->hnode);
1175 kfree(objp: addr);
1176 }
1177 break;
1178 case QETH_DISP_ADDR_ADD:
1179 rc = qeth_l3_register_addr_entry(card, addr);
1180 if (rc && rc != -ENETDOWN) {
1181 hash_del(node: &addr->hnode);
1182 kfree(objp: addr);
1183 break;
1184 }
1185 fallthrough;
1186 default:
1187 /* for next call to set_rx_mode(): */
1188 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1189 }
1190 }
1191 }
1192
1193 qeth_l3_set_promisc_mode(card);
1194}
1195
1196static int qeth_l3_arp_makerc(u16 rc)
1197{
1198 switch (rc) {
1199 case IPA_RC_SUCCESS:
1200 return 0;
1201 case QETH_IPA_ARP_RC_NOTSUPP:
1202 case QETH_IPA_ARP_RC_Q_NOTSUPP:
1203 return -EOPNOTSUPP;
1204 case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1205 return -EINVAL;
1206 case QETH_IPA_ARP_RC_Q_NO_DATA:
1207 return -ENOENT;
1208 default:
1209 return -EIO;
1210 }
1211}
1212
1213static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1214 unsigned long data)
1215{
1216 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1217
1218 qeth_setassparms_cb(card, reply, data);
1219 return qeth_l3_arp_makerc(rc: cmd->hdr.return_code);
1220}
1221
1222static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1223{
1224 struct qeth_cmd_buffer *iob;
1225 int rc;
1226
1227 QETH_CARD_TEXT(card, 3, "arpstnoe");
1228
1229 /*
1230 * currently GuestLAN only supports the ARP assist function
1231 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1232 * thus we say EOPNOTSUPP for this ARP function
1233 */
1234 if (IS_VM_NIC(card))
1235 return -EOPNOTSUPP;
1236 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1237 return -EOPNOTSUPP;
1238 }
1239
1240 iob = qeth_get_setassparms_cmd(card, ipa_func: IPA_ARP_PROCESSING,
1241 cmd_code: IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1242 SETASS_DATA_SIZEOF(flags_32bit),
1243 prot: QETH_PROT_IPV4);
1244 if (!iob)
1245 return -ENOMEM;
1246
1247 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1248 rc = qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_arp_cmd_cb, NULL);
1249 if (rc)
1250 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1251 CARD_DEVID(card), rc);
1252 return rc;
1253}
1254
1255static __u32 get_arp_entry_size(struct qeth_card *card,
1256 struct qeth_arp_query_data *qdata,
1257 struct qeth_arp_entrytype *type, __u8 strip_entries)
1258{
1259 __u32 rc;
1260 __u8 is_hsi;
1261
1262 is_hsi = qdata->reply_bits == 5;
1263 if (type->ip == QETHARP_IP_ADDR_V4) {
1264 QETH_CARD_TEXT(card, 4, "arpev4");
1265 if (strip_entries) {
1266 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1267 sizeof(struct qeth_arp_qi_entry7_short);
1268 } else {
1269 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1270 sizeof(struct qeth_arp_qi_entry7);
1271 }
1272 } else if (type->ip == QETHARP_IP_ADDR_V6) {
1273 QETH_CARD_TEXT(card, 4, "arpev6");
1274 if (strip_entries) {
1275 rc = is_hsi ?
1276 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1277 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1278 } else {
1279 rc = is_hsi ?
1280 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1281 sizeof(struct qeth_arp_qi_entry7_ipv6);
1282 }
1283 } else {
1284 QETH_CARD_TEXT(card, 4, "arpinv");
1285 rc = 0;
1286 }
1287
1288 return rc;
1289}
1290
1291static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1292{
1293 return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1294 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1295}
1296
1297static int qeth_l3_arp_query_cb(struct qeth_card *card,
1298 struct qeth_reply *reply, unsigned long data)
1299{
1300 struct qeth_ipa_cmd *cmd;
1301 struct qeth_arp_query_data *qdata;
1302 struct qeth_arp_query_info *qinfo;
1303 int e;
1304 int entrybytes_done;
1305 int stripped_bytes;
1306 __u8 do_strip_entries;
1307
1308 QETH_CARD_TEXT(card, 3, "arpquecb");
1309
1310 qinfo = (struct qeth_arp_query_info *) reply->param;
1311 cmd = (struct qeth_ipa_cmd *) data;
1312 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1313 if (cmd->hdr.return_code) {
1314 QETH_CARD_TEXT(card, 4, "arpcberr");
1315 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1316 return qeth_l3_arp_makerc(rc: cmd->hdr.return_code);
1317 }
1318 if (cmd->data.setassparms.hdr.return_code) {
1319 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1320 QETH_CARD_TEXT(card, 4, "setaperr");
1321 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1322 return qeth_l3_arp_makerc(rc: cmd->hdr.return_code);
1323 }
1324 qdata = &cmd->data.setassparms.data.query_arp;
1325 QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1326
1327 do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1328 stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1329 entrybytes_done = 0;
1330 for (e = 0; e < qdata->no_entries; ++e) {
1331 char *cur_entry;
1332 __u32 esize;
1333 struct qeth_arp_entrytype *etype;
1334
1335 cur_entry = &qdata->data + entrybytes_done;
1336 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1337 if (!arpentry_matches_prot(type: etype, prot: cmd->hdr.prot_version)) {
1338 QETH_CARD_TEXT(card, 4, "pmis");
1339 QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1340 break;
1341 }
1342 esize = get_arp_entry_size(card, qdata, type: etype,
1343 strip_entries: do_strip_entries);
1344 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1345 if (!esize)
1346 break;
1347
1348 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1349 QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1350 memset(qinfo->udata, 0, 4);
1351 return -ENOSPC;
1352 }
1353
1354 memcpy(qinfo->udata + qinfo->udata_offset,
1355 &qdata->data + entrybytes_done + stripped_bytes,
1356 esize);
1357 entrybytes_done += esize + stripped_bytes;
1358 qinfo->udata_offset += esize;
1359 ++qinfo->no_entries;
1360 }
1361 /* check if all replies received ... */
1362 if (cmd->data.setassparms.hdr.seq_no <
1363 cmd->data.setassparms.hdr.number_of_replies)
1364 return 1;
1365 QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1366 memcpy(qinfo->udata, &qinfo->no_entries, 4);
1367 /* keep STRIP_ENTRIES flag so the user program can distinguish
1368 * stripped entries from normal ones */
1369 if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1370 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1371 memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1372 QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1373 return 0;
1374}
1375
1376static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1377 enum qeth_prot_versions prot,
1378 struct qeth_arp_query_info *qinfo)
1379{
1380 struct qeth_cmd_buffer *iob;
1381 struct qeth_ipa_cmd *cmd;
1382 int rc;
1383
1384 QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1385
1386 iob = qeth_get_setassparms_cmd(card, ipa_func: IPA_ARP_PROCESSING,
1387 cmd_code: IPA_CMD_ASS_ARP_QUERY_INFO,
1388 SETASS_DATA_SIZEOF(query_arp), prot);
1389 if (!iob)
1390 return -ENOMEM;
1391 cmd = __ipa_cmd(iob);
1392 cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1393 rc = qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_arp_query_cb, qinfo);
1394 if (rc)
1395 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1396 CARD_DEVID(card), rc);
1397 return rc;
1398}
1399
1400static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1401{
1402 struct qeth_arp_query_info qinfo = {0, };
1403 int rc;
1404
1405 QETH_CARD_TEXT(card, 3, "arpquery");
1406
1407 if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1408 IPA_ARP_PROCESSING)) {
1409 QETH_CARD_TEXT(card, 3, "arpqnsup");
1410 rc = -EOPNOTSUPP;
1411 goto out;
1412 }
1413 /* get size of userspace buffer and mask_bits -> 6 bytes */
1414 if (copy_from_user(to: &qinfo, from: udata, n: 6)) {
1415 rc = -EFAULT;
1416 goto out;
1417 }
1418 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1419 if (!qinfo.udata) {
1420 rc = -ENOMEM;
1421 goto out;
1422 }
1423 qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1424 rc = qeth_l3_query_arp_cache_info(card, prot: QETH_PROT_IPV4, qinfo: &qinfo);
1425 if (rc) {
1426 if (copy_to_user(to: udata, from: qinfo.udata, n: 4))
1427 rc = -EFAULT;
1428 goto free_and_out;
1429 }
1430 if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1431 /* fails in case of GuestLAN QDIO mode */
1432 qeth_l3_query_arp_cache_info(card, prot: QETH_PROT_IPV6, qinfo: &qinfo);
1433 }
1434 if (copy_to_user(to: udata, from: qinfo.udata, n: qinfo.udata_len)) {
1435 QETH_CARD_TEXT(card, 4, "qactf");
1436 rc = -EFAULT;
1437 goto free_and_out;
1438 }
1439 QETH_CARD_TEXT(card, 4, "qacts");
1440
1441free_and_out:
1442 kfree(objp: qinfo.udata);
1443out:
1444 return rc;
1445}
1446
1447static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1448 struct qeth_arp_cache_entry *entry,
1449 enum qeth_arp_process_subcmds arp_cmd)
1450{
1451 struct qeth_arp_cache_entry *cmd_entry;
1452 struct qeth_cmd_buffer *iob;
1453 int rc;
1454
1455 if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1456 QETH_CARD_TEXT(card, 3, "arpadd");
1457 else
1458 QETH_CARD_TEXT(card, 3, "arpdel");
1459
1460 /*
1461 * currently GuestLAN only supports the ARP assist function
1462 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1463 * thus we say EOPNOTSUPP for this ARP function
1464 */
1465 if (IS_VM_NIC(card))
1466 return -EOPNOTSUPP;
1467 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1468 return -EOPNOTSUPP;
1469 }
1470
1471 iob = qeth_get_setassparms_cmd(card, ipa_func: IPA_ARP_PROCESSING, cmd_code: arp_cmd,
1472 SETASS_DATA_SIZEOF(arp_entry),
1473 prot: QETH_PROT_IPV4);
1474 if (!iob)
1475 return -ENOMEM;
1476
1477 cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1478 ether_addr_copy(dst: cmd_entry->macaddr, src: entry->macaddr);
1479 memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1480 rc = qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_arp_cmd_cb, NULL);
1481 if (rc)
1482 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1483 arp_cmd, CARD_DEVID(card), rc);
1484 return rc;
1485}
1486
1487static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1488{
1489 struct qeth_cmd_buffer *iob;
1490 int rc;
1491
1492 QETH_CARD_TEXT(card, 3, "arpflush");
1493
1494 /*
1495 * currently GuestLAN only supports the ARP assist function
1496 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1497 * thus we say EOPNOTSUPP for this ARP function
1498 */
1499 if (IS_VM_NIC(card) || IS_IQD(card))
1500 return -EOPNOTSUPP;
1501 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1502 return -EOPNOTSUPP;
1503 }
1504
1505 iob = qeth_get_setassparms_cmd(card, ipa_func: IPA_ARP_PROCESSING,
1506 cmd_code: IPA_CMD_ASS_ARP_FLUSH_CACHE, data_length: 0,
1507 prot: QETH_PROT_IPV4);
1508 if (!iob)
1509 return -ENOMEM;
1510
1511 rc = qeth_send_ipa_cmd(card, iob, reply_cb: qeth_l3_arp_cmd_cb, NULL);
1512 if (rc)
1513 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1514 CARD_DEVID(card), rc);
1515 return rc;
1516}
1517
1518static int qeth_l3_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1519 void __user *data, int cmd)
1520{
1521 struct qeth_card *card = dev->ml_priv;
1522 struct qeth_arp_cache_entry arp_entry;
1523 enum qeth_arp_process_subcmds arp_cmd;
1524 int rc = 0;
1525
1526 switch (cmd) {
1527 case SIOC_QETH_ARP_SET_NO_ENTRIES:
1528 if (!capable(CAP_NET_ADMIN)) {
1529 rc = -EPERM;
1530 break;
1531 }
1532 rc = qeth_l3_arp_set_no_entries(card, no_entries: rq->ifr_ifru.ifru_ivalue);
1533 break;
1534 case SIOC_QETH_ARP_QUERY_INFO:
1535 if (!capable(CAP_NET_ADMIN)) {
1536 rc = -EPERM;
1537 break;
1538 }
1539 rc = qeth_l3_arp_query(card, udata: data);
1540 break;
1541 case SIOC_QETH_ARP_ADD_ENTRY:
1542 case SIOC_QETH_ARP_REMOVE_ENTRY:
1543 if (!capable(CAP_NET_ADMIN))
1544 return -EPERM;
1545 if (copy_from_user(to: &arp_entry, from: data, n: sizeof(arp_entry)))
1546 return -EFAULT;
1547
1548 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1549 IPA_CMD_ASS_ARP_ADD_ENTRY :
1550 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1551 return qeth_l3_arp_modify_entry(card, entry: &arp_entry, arp_cmd);
1552 case SIOC_QETH_ARP_FLUSH_CACHE:
1553 if (!capable(CAP_NET_ADMIN)) {
1554 rc = -EPERM;
1555 break;
1556 }
1557 rc = qeth_l3_arp_flush_cache(card);
1558 break;
1559 default:
1560 rc = qeth_siocdevprivate(dev, rq, data, cmd);
1561 }
1562 return rc;
1563}
1564
1565static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1566 __be16 proto)
1567{
1568 struct neighbour *n = NULL;
1569
1570 if (dst)
1571 n = dst_neigh_lookup_skb(dst, skb);
1572
1573 if (n) {
1574 int cast_type = n->type;
1575
1576 neigh_release(neigh: n);
1577 if ((cast_type == RTN_BROADCAST) ||
1578 (cast_type == RTN_MULTICAST) ||
1579 (cast_type == RTN_ANYCAST))
1580 return cast_type;
1581 return RTN_UNICAST;
1582 }
1583
1584 /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1585 switch (proto) {
1586 case htons(ETH_P_IP):
1587 if (ipv4_is_lbcast(addr: ip_hdr(skb)->daddr))
1588 return RTN_BROADCAST;
1589 return ipv4_is_multicast(addr: ip_hdr(skb)->daddr) ?
1590 RTN_MULTICAST : RTN_UNICAST;
1591 case htons(ETH_P_IPV6):
1592 return ipv6_addr_is_multicast(addr: &ipv6_hdr(skb)->daddr) ?
1593 RTN_MULTICAST : RTN_UNICAST;
1594 case htons(ETH_P_AF_IUCV):
1595 return RTN_UNICAST;
1596 default:
1597 /* OSA only: ... and MAC address */
1598 return qeth_get_ether_cast_type(skb);
1599 }
1600}
1601
1602static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1603{
1604 struct dst_entry *dst;
1605 int cast_type;
1606
1607 rcu_read_lock();
1608 dst = qeth_dst_check_rcu(skb, proto);
1609 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1610 rcu_read_unlock();
1611
1612 return cast_type;
1613}
1614
1615static u8 qeth_l3_cast_type_to_flag(int cast_type)
1616{
1617 if (cast_type == RTN_MULTICAST)
1618 return QETH_CAST_MULTICAST;
1619 if (cast_type == RTN_ANYCAST)
1620 return QETH_CAST_ANYCAST;
1621 if (cast_type == RTN_BROADCAST)
1622 return QETH_CAST_BROADCAST;
1623 return QETH_CAST_UNICAST;
1624}
1625
1626static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1627 struct qeth_hdr *hdr, struct sk_buff *skb,
1628 __be16 proto, unsigned int data_len)
1629{
1630 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1631 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1632 struct qeth_card *card = queue->card;
1633 struct dst_entry *dst;
1634 int cast_type;
1635
1636 hdr->hdr.l3.length = data_len;
1637
1638 if (skb_is_gso(skb)) {
1639 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1640 } else {
1641 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1642
1643 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1644 qeth_tx_csum(skb, flags: &hdr->hdr.l3.ext_flags, proto);
1645 /* some HW requires combined L3+L4 csum offload: */
1646 if (proto == htons(ETH_P_IP))
1647 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1648 }
1649 }
1650
1651 if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1652 /* NETIF_F_HW_VLAN_CTAG_TX */
1653 if (skb_vlan_tag_present(skb)) {
1654 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1655 hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1656 }
1657 } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1658 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1659 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1660 }
1661
1662 rcu_read_lock();
1663 dst = qeth_dst_check_rcu(skb, proto);
1664
1665 if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1666 cast_type = RTN_UNICAST;
1667 else
1668 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1669 l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1670
1671 switch (proto) {
1672 case htons(ETH_P_IP):
1673 l3_hdr->next_hop.addr.s6_addr32[3] =
1674 qeth_next_hop_v4_rcu(skb, dst);
1675 break;
1676 case htons(ETH_P_IPV6):
1677 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1678
1679 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1680 if (!IS_IQD(card))
1681 hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1682 break;
1683 case htons(ETH_P_AF_IUCV):
1684 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1685 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1686 iucv_trans_hdr(skb)->destUserID, 8);
1687 l3_hdr->flags |= QETH_HDR_IPV6;
1688 break;
1689 default:
1690 /* OSA only: */
1691 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1692 }
1693 rcu_read_unlock();
1694}
1695
1696static void qeth_l3_fixup_headers(struct sk_buff *skb)
1697{
1698 struct iphdr *iph = ip_hdr(skb);
1699
1700 /* this is safe, IPv6 traffic takes a different path */
1701 if (skb->ip_summed == CHECKSUM_PARTIAL)
1702 iph->check = 0;
1703 if (skb_is_gso(skb)) {
1704 iph->tot_len = 0;
1705 tcp_hdr(skb)->check = ~tcp_v4_check(len: 0, saddr: iph->saddr,
1706 daddr: iph->daddr, base: 0);
1707 }
1708}
1709
1710static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1711 struct qeth_qdio_out_q *queue, __be16 proto)
1712{
1713 unsigned int hw_hdr_len;
1714 int rc;
1715
1716 /* re-use the L2 header area for the HW header: */
1717 hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1718 sizeof(struct qeth_hdr);
1719 rc = skb_cow_head(skb, headroom: hw_hdr_len - ETH_HLEN);
1720 if (rc)
1721 return rc;
1722 skb_pull(skb, ETH_HLEN);
1723
1724 qeth_l3_fixup_headers(skb);
1725 return qeth_xmit(card, skb, queue, proto, fill_header: qeth_l3_fill_header);
1726}
1727
1728static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1729 struct net_device *dev)
1730{
1731 struct qeth_card *card = dev->ml_priv;
1732 __be16 proto = vlan_get_protocol(skb);
1733 u16 txq = skb_get_queue_mapping(skb);
1734 struct qeth_qdio_out_q *queue;
1735 int rc;
1736
1737 if (!skb_is_gso(skb))
1738 qdisc_skb_cb(skb)->pkt_len = skb->len;
1739 if (IS_IQD(card)) {
1740 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1741
1742 if (card->options.sniffer)
1743 goto tx_drop;
1744
1745 switch (proto) {
1746 case htons(ETH_P_AF_IUCV):
1747 if (card->options.cq != QETH_CQ_ENABLED)
1748 goto tx_drop;
1749 break;
1750 case htons(ETH_P_IP):
1751 case htons(ETH_P_IPV6):
1752 if (card->options.cq == QETH_CQ_ENABLED)
1753 goto tx_drop;
1754 break;
1755 default:
1756 goto tx_drop;
1757 }
1758 } else {
1759 queue = card->qdio.out_qs[txq];
1760 }
1761
1762 if (!(dev->flags & IFF_BROADCAST) &&
1763 qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1764 goto tx_drop;
1765
1766 if (proto == htons(ETH_P_IP) || IS_IQD(card))
1767 rc = qeth_l3_xmit(card, skb, queue, proto);
1768 else
1769 rc = qeth_xmit(card, skb, queue, proto, fill_header: qeth_l3_fill_header);
1770
1771 if (!rc)
1772 return NETDEV_TX_OK;
1773
1774tx_drop:
1775 QETH_TXQ_STAT_INC(queue, tx_dropped);
1776 kfree_skb(skb);
1777 return NETDEV_TX_OK;
1778}
1779
1780static void qeth_l3_set_rx_mode(struct net_device *dev)
1781{
1782 struct qeth_card *card = dev->ml_priv;
1783
1784 schedule_work(work: &card->rx_mode_work);
1785}
1786
1787/*
1788 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1789 * NOARP on the netdevice is no option because it also turns off neighbor
1790 * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1791 * arp resolution but we want the hard header (packet socket will work
1792 * e.g. tcpdump)
1793 */
1794static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1795{
1796 n->nud_state = NUD_NOARP;
1797 memcpy(n->ha, "FAKELL", 6);
1798 n->output = n->ops->connected_output;
1799 return 0;
1800}
1801
1802static int
1803qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1804{
1805 if (np->tbl->family == AF_INET)
1806 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1807
1808 return 0;
1809}
1810
1811static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1812 struct net_device *dev,
1813 netdev_features_t features)
1814{
1815 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1816 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1817 return qeth_features_check(skb, dev, features);
1818}
1819
1820static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1821 struct net_device *sb_dev)
1822{
1823 __be16 proto = vlan_get_protocol(skb);
1824
1825 return qeth_iqd_select_queue(dev, skb,
1826 cast_type: qeth_l3_get_cast_type(skb, proto), sb_dev);
1827}
1828
1829static const struct net_device_ops qeth_l3_netdev_ops = {
1830 .ndo_open = qeth_open,
1831 .ndo_stop = qeth_stop,
1832 .ndo_get_stats64 = qeth_get_stats64,
1833 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1834 .ndo_select_queue = qeth_l3_iqd_select_queue,
1835 .ndo_validate_addr = eth_validate_addr,
1836 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1837 .ndo_eth_ioctl = qeth_do_ioctl,
1838 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate,
1839 .ndo_fix_features = qeth_fix_features,
1840 .ndo_set_features = qeth_set_features,
1841 .ndo_tx_timeout = qeth_tx_timeout,
1842};
1843
1844static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1845 .ndo_open = qeth_open,
1846 .ndo_stop = qeth_stop,
1847 .ndo_get_stats64 = qeth_get_stats64,
1848 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1849 .ndo_features_check = qeth_l3_osa_features_check,
1850 .ndo_select_queue = qeth_osa_select_queue,
1851 .ndo_validate_addr = eth_validate_addr,
1852 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1853 .ndo_eth_ioctl = qeth_do_ioctl,
1854 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate,
1855 .ndo_fix_features = qeth_fix_features,
1856 .ndo_set_features = qeth_set_features,
1857 .ndo_tx_timeout = qeth_tx_timeout,
1858 .ndo_neigh_setup = qeth_l3_neigh_setup,
1859};
1860
1861static int qeth_l3_setup_netdev(struct qeth_card *card)
1862{
1863 struct net_device *dev = card->dev;
1864 unsigned int headroom;
1865 int rc;
1866
1867 if (IS_OSD(card) || IS_OSX(card)) {
1868 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1869
1870 /*IPv6 address autoconfiguration stuff*/
1871 dev->dev_id = qeth_l3_get_unique_id(card, uid: dev->dev_id);
1872
1873 if (!IS_VM_NIC(card)) {
1874 card->dev->features |= NETIF_F_SG;
1875 card->dev->hw_features |= NETIF_F_TSO |
1876 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1877 card->dev->vlan_features |= NETIF_F_TSO |
1878 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1879 }
1880
1881 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1882 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1883 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1884 }
1885 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1886 card->dev->hw_features |= NETIF_F_TSO6;
1887 card->dev->vlan_features |= NETIF_F_TSO6;
1888 }
1889
1890 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1891 if (card->dev->hw_features & NETIF_F_TSO6)
1892 headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1893 else if (card->dev->hw_features & NETIF_F_TSO)
1894 headroom = sizeof(struct qeth_hdr_tso);
1895 else
1896 headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1897 } else if (IS_IQD(card)) {
1898 card->dev->flags |= IFF_NOARP;
1899 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1900 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1901
1902 rc = qeth_l3_iqd_read_initial_mac(card);
1903 if (rc)
1904 return rc;
1905 } else
1906 return -ENODEV;
1907
1908 card->dev->needed_headroom = headroom;
1909 card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1910 NETIF_F_HW_VLAN_CTAG_RX;
1911
1912 netif_keep_dst(dev: card->dev);
1913 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1914 netif_set_tso_max_size(dev: card->dev,
1915 PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1916
1917 netif_napi_add(dev: card->dev, napi: &card->napi, poll: qeth_poll);
1918 return register_netdev(dev: card->dev);
1919}
1920
1921static const struct device_type qeth_l3_devtype = {
1922 .name = "qeth_layer3",
1923 .groups = qeth_l3_attr_groups,
1924};
1925
1926static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1927{
1928 struct qeth_card *card = dev_get_drvdata(dev: &gdev->dev);
1929 int rc;
1930
1931 hash_init(card->ip_htable);
1932 mutex_init(&card->ip_lock);
1933 card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1934 dev_name(&gdev->dev));
1935 if (!card->cmd_wq)
1936 return -ENOMEM;
1937
1938 if (gdev->dev.type) {
1939 rc = device_add_groups(dev: &gdev->dev, groups: qeth_l3_attr_groups);
1940 if (rc) {
1941 destroy_workqueue(wq: card->cmd_wq);
1942 return rc;
1943 }
1944 } else {
1945 gdev->dev.type = &qeth_l3_devtype;
1946 }
1947
1948 INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1949 return 0;
1950}
1951
1952static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1953{
1954 struct qeth_card *card = dev_get_drvdata(dev: &cgdev->dev);
1955
1956 if (cgdev->dev.type != &qeth_l3_devtype)
1957 device_remove_groups(dev: &cgdev->dev, groups: qeth_l3_attr_groups);
1958
1959 qeth_set_allowed_threads(card, threads: 0, clear_start_mask: 1);
1960 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1961
1962 if (cgdev->state == CCWGROUP_ONLINE)
1963 qeth_set_offline(card, disc: card->discipline, resetting: false);
1964
1965 if (card->dev->reg_state == NETREG_REGISTERED)
1966 unregister_netdev(dev: card->dev);
1967
1968 destroy_workqueue(wq: card->cmd_wq);
1969 qeth_l3_clear_ip_htable(card, recover: 0);
1970 qeth_l3_clear_ipato_list(card);
1971}
1972
1973static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1974{
1975 struct net_device *dev = card->dev;
1976 int rc = 0;
1977
1978 /* softsetup */
1979 QETH_CARD_TEXT(card, 2, "softsetp");
1980
1981 rc = qeth_l3_setadapter_parms(card);
1982 if (rc)
1983 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1984 if (!card->options.sniffer) {
1985 qeth_l3_start_ipassists(card);
1986
1987 rc = qeth_l3_setrouting_v4(card);
1988 if (rc)
1989 QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1990 rc = qeth_l3_setrouting_v6(card);
1991 if (rc)
1992 QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
1993 }
1994
1995 card->state = CARD_STATE_SOFTSETUP;
1996
1997 qeth_set_allowed_threads(card, threads: 0xffffffff, clear_start_mask: 0);
1998 qeth_l3_recover_ip(card);
1999
2000 if (dev->reg_state != NETREG_REGISTERED) {
2001 rc = qeth_l3_setup_netdev(card);
2002 if (rc)
2003 goto err_setup;
2004
2005 if (carrier_ok)
2006 netif_carrier_on(dev);
2007 } else {
2008 rtnl_lock();
2009 rc = qeth_set_real_num_tx_queues(card,
2010 count: qeth_tx_actual_queues(card));
2011 if (rc) {
2012 rtnl_unlock();
2013 goto err_set_queues;
2014 }
2015
2016 if (carrier_ok)
2017 netif_carrier_on(dev);
2018 else
2019 netif_carrier_off(dev);
2020
2021 netif_device_attach(dev);
2022 qeth_enable_hw_features(dev);
2023
2024 if (netif_running(dev)) {
2025 local_bh_disable();
2026 napi_schedule(n: &card->napi);
2027 /* kick-start the NAPI softirq: */
2028 local_bh_enable();
2029 }
2030 rtnl_unlock();
2031 }
2032 return 0;
2033
2034err_set_queues:
2035err_setup:
2036 qeth_set_allowed_threads(card, threads: 0, clear_start_mask: 1);
2037 card->state = CARD_STATE_DOWN;
2038 qeth_l3_clear_ip_htable(card, recover: 1);
2039 return rc;
2040}
2041
2042static void qeth_l3_set_offline(struct qeth_card *card)
2043{
2044 qeth_set_allowed_threads(card, threads: 0, clear_start_mask: 1);
2045 qeth_l3_drain_rx_mode_cache(card);
2046
2047 if (card->options.sniffer &&
2048 (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2049 qeth_diags_trace(card, diags_cmd: QETH_DIAGS_CMD_TRACE_DISABLE);
2050
2051 if (card->state == CARD_STATE_SOFTSETUP) {
2052 card->state = CARD_STATE_DOWN;
2053 qeth_l3_clear_ip_htable(card, recover: 1);
2054 }
2055}
2056
2057/* Returns zero if the command is successfully "consumed" */
2058static int qeth_l3_control_event(struct qeth_card *card,
2059 struct qeth_ipa_cmd *cmd)
2060{
2061 return 1;
2062}
2063
2064const struct qeth_discipline qeth_l3_discipline = {
2065 .setup = qeth_l3_probe_device,
2066 .remove = qeth_l3_remove_device,
2067 .set_online = qeth_l3_set_online,
2068 .set_offline = qeth_l3_set_offline,
2069 .control_event_handler = qeth_l3_control_event,
2070};
2071EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2072
2073static int qeth_l3_handle_ip_event(struct qeth_card *card,
2074 struct qeth_ipaddr *addr,
2075 unsigned long event)
2076{
2077 switch (event) {
2078 case NETDEV_UP:
2079 qeth_l3_modify_ip(card, addr, add: true);
2080 return NOTIFY_OK;
2081 case NETDEV_DOWN:
2082 qeth_l3_modify_ip(card, addr, add: false);
2083 return NOTIFY_OK;
2084 default:
2085 return NOTIFY_DONE;
2086 }
2087}
2088
2089struct qeth_l3_ip_event_work {
2090 struct work_struct work;
2091 struct qeth_card *card;
2092 struct qeth_ipaddr addr;
2093};
2094
2095#define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2096
2097static void qeth_l3_add_ip_worker(struct work_struct *work)
2098{
2099 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2100
2101 qeth_l3_modify_ip(card: ip_work->card, addr: &ip_work->addr, add: true);
2102 kfree(objp: work);
2103}
2104
2105static void qeth_l3_delete_ip_worker(struct work_struct *work)
2106{
2107 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2108
2109 qeth_l3_modify_ip(card: ip_work->card, addr: &ip_work->addr, add: false);
2110 kfree(objp: work);
2111}
2112
2113static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2114{
2115 if (is_vlan_dev(dev))
2116 dev = vlan_dev_real_dev(dev);
2117 if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2118 dev->netdev_ops == &qeth_l3_netdev_ops)
2119 return (struct qeth_card *) dev->ml_priv;
2120 return NULL;
2121}
2122
2123static int qeth_l3_ip_event(struct notifier_block *this,
2124 unsigned long event, void *ptr)
2125{
2126 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2127 struct net_device *dev = ifa->ifa_dev->dev;
2128 struct qeth_ipaddr addr;
2129 struct qeth_card *card;
2130
2131 card = qeth_l3_get_card_from_dev(dev);
2132 if (!card)
2133 return NOTIFY_DONE;
2134 QETH_CARD_TEXT(card, 3, "ipevent");
2135
2136 qeth_l3_init_ipaddr(addr: &addr, type: QETH_IP_TYPE_NORMAL, proto: QETH_PROT_IPV4);
2137 addr.u.a4.addr = ifa->ifa_address;
2138 addr.u.a4.mask = ifa->ifa_mask;
2139
2140 return qeth_l3_handle_ip_event(card, addr: &addr, event);
2141}
2142
2143static struct notifier_block qeth_l3_ip_notifier = {
2144 qeth_l3_ip_event,
2145 NULL,
2146};
2147
2148static int qeth_l3_ip6_event(struct notifier_block *this,
2149 unsigned long event, void *ptr)
2150{
2151 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2152 struct net_device *dev = ifa->idev->dev;
2153 struct qeth_l3_ip_event_work *ip_work;
2154 struct qeth_card *card;
2155
2156 if (event != NETDEV_UP && event != NETDEV_DOWN)
2157 return NOTIFY_DONE;
2158
2159 card = qeth_l3_get_card_from_dev(dev);
2160 if (!card)
2161 return NOTIFY_DONE;
2162 QETH_CARD_TEXT(card, 3, "ip6event");
2163 if (!qeth_is_supported(card, IPA_IPV6))
2164 return NOTIFY_DONE;
2165
2166 ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2167 if (!ip_work)
2168 return NOTIFY_DONE;
2169
2170 if (event == NETDEV_UP)
2171 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2172 else
2173 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2174
2175 ip_work->card = card;
2176 qeth_l3_init_ipaddr(addr: &ip_work->addr, type: QETH_IP_TYPE_NORMAL,
2177 proto: QETH_PROT_IPV6);
2178 ip_work->addr.u.a6.addr = ifa->addr;
2179 ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2180
2181 queue_work(wq: card->cmd_wq, work: &ip_work->work);
2182 return NOTIFY_OK;
2183}
2184
2185static struct notifier_block qeth_l3_ip6_notifier = {
2186 qeth_l3_ip6_event,
2187 NULL,
2188};
2189
2190static int qeth_l3_register_notifiers(void)
2191{
2192 int rc;
2193
2194 QETH_DBF_TEXT(SETUP, 5, "regnotif");
2195 rc = register_inetaddr_notifier(nb: &qeth_l3_ip_notifier);
2196 if (rc)
2197 return rc;
2198 rc = register_inet6addr_notifier(nb: &qeth_l3_ip6_notifier);
2199 if (rc) {
2200 unregister_inetaddr_notifier(nb: &qeth_l3_ip_notifier);
2201 return rc;
2202 }
2203 return 0;
2204}
2205
2206static void qeth_l3_unregister_notifiers(void)
2207{
2208 QETH_DBF_TEXT(SETUP, 5, "unregnot");
2209 WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2210 WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2211}
2212
2213static int __init qeth_l3_init(void)
2214{
2215 pr_info("register layer 3 discipline\n");
2216 return qeth_l3_register_notifiers();
2217}
2218
2219static void __exit qeth_l3_exit(void)
2220{
2221 qeth_l3_unregister_notifiers();
2222 pr_info("unregister layer 3 discipline\n");
2223}
2224
2225module_init(qeth_l3_init);
2226module_exit(qeth_l3_exit);
2227MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2228MODULE_DESCRIPTION("qeth layer 3 discipline");
2229MODULE_LICENSE("GPL");
2230

source code of linux/drivers/s390/net/qeth_l3_main.c