1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/bitops.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/etherdevice.h>
20 #include <linux/ip.h>
21 #include <linux/in.h>
22 #include <linux/ipv6.h>
23 #include <linux/inetdevice.h>
24 #include <linux/igmp.h>
25 #include <linux/slab.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/skbuff.h>
29
30 #include <net/ip.h>
31 #include <net/arp.h>
32 #include <net/route.h>
33 #include <net/ipv6.h>
34 #include <net/ip6_route.h>
35 #include <net/iucv/af_iucv.h>
36 #include <linux/hashtable.h>
37
38 #include "qeth_l3.h"
39
40 static int qeth_l3_register_addr_entry(struct qeth_card *,
41 struct qeth_ipaddr *);
42 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
43 struct qeth_ipaddr *);
44
qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto,const u8 * addr,char * buf)45 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
46 char *buf)
47 {
48 if (proto == QETH_PROT_IPV4)
49 return sprintf(buf, "%pI4", addr);
50 else
51 return sprintf(buf, "%pI6", addr);
52 }
53
qeth_l3_find_addr_by_ip(struct qeth_card * card,struct qeth_ipaddr * query)54 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
55 struct qeth_ipaddr *query)
56 {
57 u32 key = qeth_l3_ipaddr_hash(query);
58 struct qeth_ipaddr *addr;
59
60 if (query->is_multicast) {
61 hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
62 if (qeth_l3_addr_match_ip(addr, query))
63 return addr;
64 } else {
65 hash_for_each_possible(card->ip_htable, addr, hnode, key)
66 if (qeth_l3_addr_match_ip(addr, query))
67 return addr;
68 }
69 return NULL;
70 }
71
qeth_l3_convert_addr_to_bits(u8 * addr,u8 * bits,int len)72 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
73 {
74 int i, j;
75 u8 octet;
76
77 for (i = 0; i < len; ++i) {
78 octet = addr[i];
79 for (j = 7; j >= 0; --j) {
80 bits[i*8 + j] = octet & 1;
81 octet >>= 1;
82 }
83 }
84 }
85
qeth_l3_is_addr_covered_by_ipato(struct qeth_card * card,struct qeth_ipaddr * addr)86 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
87 struct qeth_ipaddr *addr)
88 {
89 struct qeth_ipato_entry *ipatoe;
90 u8 addr_bits[128] = {0, };
91 u8 ipatoe_bits[128] = {0, };
92 int rc = 0;
93
94 if (!card->ipato.enabled)
95 return false;
96 if (addr->type != QETH_IP_TYPE_NORMAL)
97 return false;
98
99 qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
100 (addr->proto == QETH_PROT_IPV4) ? 4 : 16);
101 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
102 if (addr->proto != ipatoe->proto)
103 continue;
104 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
105 (ipatoe->proto == QETH_PROT_IPV4) ?
106 4 : 16);
107 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
108 if (rc)
109 break;
110 }
111 /* invert? */
112 if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
113 rc = !rc;
114 else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
115 rc = !rc;
116
117 return rc;
118 }
119
qeth_l3_delete_ip(struct qeth_card * card,struct qeth_ipaddr * tmp_addr)120 static int qeth_l3_delete_ip(struct qeth_card *card,
121 struct qeth_ipaddr *tmp_addr)
122 {
123 int rc = 0;
124 struct qeth_ipaddr *addr;
125
126 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
127 QETH_CARD_TEXT(card, 2, "delrxip");
128 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
129 QETH_CARD_TEXT(card, 2, "delvipa");
130 else
131 QETH_CARD_TEXT(card, 2, "delip");
132
133 if (tmp_addr->proto == QETH_PROT_IPV4)
134 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
135 else {
136 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
137 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
138 }
139
140 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
141 if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
142 return -ENOENT;
143
144 addr->ref_counter--;
145 if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
146 return rc;
147
148 if (qeth_card_hw_is_reachable(card))
149 rc = qeth_l3_deregister_addr_entry(card, addr);
150
151 hash_del(&addr->hnode);
152 kfree(addr);
153
154 return rc;
155 }
156
qeth_l3_add_ip(struct qeth_card * card,struct qeth_ipaddr * tmp_addr)157 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
158 {
159 int rc = 0;
160 struct qeth_ipaddr *addr;
161 char buf[40];
162
163 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
164 QETH_CARD_TEXT(card, 2, "addrxip");
165 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
166 QETH_CARD_TEXT(card, 2, "addvipa");
167 else
168 QETH_CARD_TEXT(card, 2, "addip");
169
170 if (tmp_addr->proto == QETH_PROT_IPV4)
171 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
172 else {
173 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
174 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
175 }
176
177 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
178 if (addr) {
179 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
180 return -EADDRINUSE;
181 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
182 addr->ref_counter++;
183 return 0;
184 }
185 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
186 buf);
187 dev_warn(&card->gdev->dev,
188 "Registering IP address %s failed\n", buf);
189 return -EADDRINUSE;
190 } else {
191 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
192 if (!addr)
193 return -ENOMEM;
194
195 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
196 QETH_CARD_TEXT(card, 2, "tkovaddr");
197 addr->ipato = 1;
198 }
199 hash_add(card->ip_htable, &addr->hnode,
200 qeth_l3_ipaddr_hash(addr));
201
202 if (!qeth_card_hw_is_reachable(card)) {
203 addr->disp_flag = QETH_DISP_ADDR_ADD;
204 return 0;
205 }
206
207 rc = qeth_l3_register_addr_entry(card, addr);
208
209 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
210 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
211 } else {
212 hash_del(&addr->hnode);
213 kfree(addr);
214 }
215 }
216 return rc;
217 }
218
qeth_l3_modify_ip(struct qeth_card * card,struct qeth_ipaddr * addr,bool add)219 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
220 bool add)
221 {
222 int rc;
223
224 mutex_lock(&card->ip_lock);
225 rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
226 mutex_unlock(&card->ip_lock);
227
228 return rc;
229 }
230
qeth_l3_drain_rx_mode_cache(struct qeth_card * card)231 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
232 {
233 struct qeth_ipaddr *addr;
234 struct hlist_node *tmp;
235 int i;
236
237 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
238 hash_del(&addr->hnode);
239 kfree(addr);
240 }
241 }
242
qeth_l3_clear_ip_htable(struct qeth_card * card,int recover)243 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
244 {
245 struct qeth_ipaddr *addr;
246 struct hlist_node *tmp;
247 int i;
248
249 QETH_CARD_TEXT(card, 4, "clearip");
250
251 mutex_lock(&card->ip_lock);
252
253 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
254 if (!recover) {
255 hash_del(&addr->hnode);
256 kfree(addr);
257 continue;
258 }
259 addr->disp_flag = QETH_DISP_ADDR_ADD;
260 }
261
262 mutex_unlock(&card->ip_lock);
263 }
264
qeth_l3_recover_ip(struct qeth_card * card)265 static void qeth_l3_recover_ip(struct qeth_card *card)
266 {
267 struct qeth_ipaddr *addr;
268 struct hlist_node *tmp;
269 int i;
270 int rc;
271
272 QETH_CARD_TEXT(card, 4, "recovrip");
273
274 mutex_lock(&card->ip_lock);
275
276 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
277 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
278 rc = qeth_l3_register_addr_entry(card, addr);
279
280 if (!rc) {
281 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
282 } else {
283 hash_del(&addr->hnode);
284 kfree(addr);
285 }
286 }
287 }
288
289 mutex_unlock(&card->ip_lock);
290 }
291
qeth_l3_setdelip_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)292 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
293 unsigned long data)
294 {
295 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
296
297 switch (cmd->hdr.return_code) {
298 case IPA_RC_SUCCESS:
299 return 0;
300 case IPA_RC_DUPLICATE_IP_ADDRESS:
301 return -EADDRINUSE;
302 case IPA_RC_MC_ADDR_NOT_FOUND:
303 return -ENOENT;
304 case IPA_RC_LAN_OFFLINE:
305 return -ENETDOWN;
306 default:
307 return -EIO;
308 }
309 }
310
qeth_l3_send_setdelmc(struct qeth_card * card,struct qeth_ipaddr * addr,enum qeth_ipa_cmds ipacmd)311 static int qeth_l3_send_setdelmc(struct qeth_card *card,
312 struct qeth_ipaddr *addr,
313 enum qeth_ipa_cmds ipacmd)
314 {
315 struct qeth_cmd_buffer *iob;
316 struct qeth_ipa_cmd *cmd;
317
318 QETH_CARD_TEXT(card, 4, "setdelmc");
319
320 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
321 IPA_DATA_SIZEOF(setdelipm));
322 if (!iob)
323 return -ENOMEM;
324 cmd = __ipa_cmd(iob);
325 if (addr->proto == QETH_PROT_IPV6) {
326 cmd->data.setdelipm.ip = addr->u.a6.addr;
327 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
328 } else {
329 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
330 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
331 }
332
333 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
334 }
335
qeth_l3_set_ipv6_prefix(struct in6_addr * prefix,unsigned int len)336 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
337 {
338 unsigned int i = 0;
339
340 while (len && i < 4) {
341 int mask_len = min_t(int, len, 32);
342
343 prefix->s6_addr32[i] = inet_make_mask(mask_len);
344 len -= mask_len;
345 i++;
346 }
347 }
348
qeth_l3_get_setdelip_flags(struct qeth_ipaddr * addr,bool set)349 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
350 {
351 switch (addr->type) {
352 case QETH_IP_TYPE_RXIP:
353 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
354 case QETH_IP_TYPE_VIPA:
355 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
356 QETH_IPA_DELIP_VIPA_FLAG;
357 default:
358 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
359 }
360 }
361
qeth_l3_send_setdelip(struct qeth_card * card,struct qeth_ipaddr * addr,enum qeth_ipa_cmds ipacmd)362 static int qeth_l3_send_setdelip(struct qeth_card *card,
363 struct qeth_ipaddr *addr,
364 enum qeth_ipa_cmds ipacmd)
365 {
366 struct qeth_cmd_buffer *iob;
367 struct qeth_ipa_cmd *cmd;
368 u32 flags;
369
370 QETH_CARD_TEXT(card, 4, "setdelip");
371
372 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
373 IPA_DATA_SIZEOF(setdelip6));
374 if (!iob)
375 return -ENOMEM;
376 cmd = __ipa_cmd(iob);
377
378 flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
379 QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
380
381 if (addr->proto == QETH_PROT_IPV6) {
382 cmd->data.setdelip6.addr = addr->u.a6.addr;
383 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
384 addr->u.a6.pfxlen);
385 cmd->data.setdelip6.flags = flags;
386 } else {
387 cmd->data.setdelip4.addr = addr->u.a4.addr;
388 cmd->data.setdelip4.mask = addr->u.a4.mask;
389 cmd->data.setdelip4.flags = flags;
390 }
391
392 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
393 }
394
qeth_l3_send_setrouting(struct qeth_card * card,enum qeth_routing_types type,enum qeth_prot_versions prot)395 static int qeth_l3_send_setrouting(struct qeth_card *card,
396 enum qeth_routing_types type, enum qeth_prot_versions prot)
397 {
398 int rc;
399 struct qeth_ipa_cmd *cmd;
400 struct qeth_cmd_buffer *iob;
401
402 QETH_CARD_TEXT(card, 4, "setroutg");
403 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
404 IPA_DATA_SIZEOF(setrtg));
405 if (!iob)
406 return -ENOMEM;
407 cmd = __ipa_cmd(iob);
408 cmd->data.setrtg.type = (type);
409 rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
410
411 return rc;
412 }
413
qeth_l3_correct_routing_type(struct qeth_card * card,enum qeth_routing_types * type,enum qeth_prot_versions prot)414 static int qeth_l3_correct_routing_type(struct qeth_card *card,
415 enum qeth_routing_types *type, enum qeth_prot_versions prot)
416 {
417 if (IS_IQD(card)) {
418 switch (*type) {
419 case NO_ROUTER:
420 case PRIMARY_CONNECTOR:
421 case SECONDARY_CONNECTOR:
422 case MULTICAST_ROUTER:
423 return 0;
424 default:
425 goto out_inval;
426 }
427 } else {
428 switch (*type) {
429 case NO_ROUTER:
430 case PRIMARY_ROUTER:
431 case SECONDARY_ROUTER:
432 return 0;
433 case MULTICAST_ROUTER:
434 if (qeth_is_ipafunc_supported(card, prot,
435 IPA_OSA_MC_ROUTER))
436 return 0;
437 goto out_inval;
438 default:
439 goto out_inval;
440 }
441 }
442 out_inval:
443 *type = NO_ROUTER;
444 return -EINVAL;
445 }
446
qeth_l3_setrouting_v4(struct qeth_card * card)447 int qeth_l3_setrouting_v4(struct qeth_card *card)
448 {
449 int rc;
450
451 QETH_CARD_TEXT(card, 3, "setrtg4");
452
453 rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
454 QETH_PROT_IPV4);
455 if (rc)
456 return rc;
457
458 rc = qeth_l3_send_setrouting(card, card->options.route4.type,
459 QETH_PROT_IPV4);
460 if (rc) {
461 card->options.route4.type = NO_ROUTER;
462 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
463 rc, CARD_DEVID(card));
464 }
465 return rc;
466 }
467
qeth_l3_setrouting_v6(struct qeth_card * card)468 int qeth_l3_setrouting_v6(struct qeth_card *card)
469 {
470 int rc = 0;
471
472 QETH_CARD_TEXT(card, 3, "setrtg6");
473
474 if (!qeth_is_supported(card, IPA_IPV6))
475 return 0;
476 rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
477 QETH_PROT_IPV6);
478 if (rc)
479 return rc;
480
481 rc = qeth_l3_send_setrouting(card, card->options.route6.type,
482 QETH_PROT_IPV6);
483 if (rc) {
484 card->options.route6.type = NO_ROUTER;
485 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
486 rc, CARD_DEVID(card));
487 }
488 return rc;
489 }
490
491 /*
492 * IP address takeover related functions
493 */
494
495 /*
496 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
497 *
498 * Caller must hold ip_lock.
499 */
qeth_l3_update_ipato(struct qeth_card * card)500 void qeth_l3_update_ipato(struct qeth_card *card)
501 {
502 struct qeth_ipaddr *addr;
503 unsigned int i;
504
505 hash_for_each(card->ip_htable, i, addr, hnode) {
506 if (addr->type != QETH_IP_TYPE_NORMAL)
507 continue;
508 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
509 }
510 }
511
qeth_l3_clear_ipato_list(struct qeth_card * card)512 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
513 {
514 struct qeth_ipato_entry *ipatoe, *tmp;
515
516 mutex_lock(&card->ip_lock);
517
518 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
519 list_del(&ipatoe->entry);
520 kfree(ipatoe);
521 }
522
523 qeth_l3_update_ipato(card);
524 mutex_unlock(&card->ip_lock);
525 }
526
qeth_l3_add_ipato_entry(struct qeth_card * card,struct qeth_ipato_entry * new)527 int qeth_l3_add_ipato_entry(struct qeth_card *card,
528 struct qeth_ipato_entry *new)
529 {
530 struct qeth_ipato_entry *ipatoe;
531 int rc = 0;
532
533 QETH_CARD_TEXT(card, 2, "addipato");
534
535 mutex_lock(&card->ip_lock);
536
537 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
538 if (ipatoe->proto != new->proto)
539 continue;
540 if (!memcmp(ipatoe->addr, new->addr,
541 (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
542 (ipatoe->mask_bits == new->mask_bits)) {
543 rc = -EEXIST;
544 break;
545 }
546 }
547
548 if (!rc) {
549 list_add_tail(&new->entry, &card->ipato.entries);
550 qeth_l3_update_ipato(card);
551 }
552
553 mutex_unlock(&card->ip_lock);
554
555 return rc;
556 }
557
qeth_l3_del_ipato_entry(struct qeth_card * card,enum qeth_prot_versions proto,u8 * addr,unsigned int mask_bits)558 int qeth_l3_del_ipato_entry(struct qeth_card *card,
559 enum qeth_prot_versions proto, u8 *addr,
560 unsigned int mask_bits)
561 {
562 struct qeth_ipato_entry *ipatoe, *tmp;
563 int rc = -ENOENT;
564
565 QETH_CARD_TEXT(card, 2, "delipato");
566
567 mutex_lock(&card->ip_lock);
568
569 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
570 if (ipatoe->proto != proto)
571 continue;
572 if (!memcmp(ipatoe->addr, addr,
573 (proto == QETH_PROT_IPV4) ? 4 : 16) &&
574 (ipatoe->mask_bits == mask_bits)) {
575 list_del(&ipatoe->entry);
576 qeth_l3_update_ipato(card);
577 kfree(ipatoe);
578 rc = 0;
579 }
580 }
581
582 mutex_unlock(&card->ip_lock);
583
584 return rc;
585 }
586
qeth_l3_modify_rxip_vipa(struct qeth_card * card,bool add,const u8 * ip,enum qeth_ip_types type,enum qeth_prot_versions proto)587 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
588 enum qeth_ip_types type,
589 enum qeth_prot_versions proto)
590 {
591 struct qeth_ipaddr addr;
592
593 qeth_l3_init_ipaddr(&addr, type, proto);
594 if (proto == QETH_PROT_IPV4)
595 memcpy(&addr.u.a4.addr, ip, 4);
596 else
597 memcpy(&addr.u.a6.addr, ip, 16);
598
599 return qeth_l3_modify_ip(card, &addr, add);
600 }
601
qeth_l3_modify_hsuid(struct qeth_card * card,bool add)602 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
603 {
604 struct qeth_ipaddr addr;
605 unsigned int i;
606
607 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
608 addr.u.a6.addr.s6_addr[0] = 0xfe;
609 addr.u.a6.addr.s6_addr[1] = 0x80;
610 for (i = 0; i < 8; i++)
611 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
612
613 return qeth_l3_modify_ip(card, &addr, add);
614 }
615
qeth_l3_register_addr_entry(struct qeth_card * card,struct qeth_ipaddr * addr)616 static int qeth_l3_register_addr_entry(struct qeth_card *card,
617 struct qeth_ipaddr *addr)
618 {
619 char buf[50];
620 int rc = 0;
621 int cnt = 3;
622
623 if (card->options.sniffer)
624 return 0;
625
626 if (addr->proto == QETH_PROT_IPV4) {
627 QETH_CARD_TEXT(card, 2, "setaddr4");
628 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
629 } else if (addr->proto == QETH_PROT_IPV6) {
630 QETH_CARD_TEXT(card, 2, "setaddr6");
631 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
632 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
633 } else {
634 QETH_CARD_TEXT(card, 2, "setaddr?");
635 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
636 }
637 do {
638 if (addr->is_multicast)
639 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
640 else
641 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
642 if (rc)
643 QETH_CARD_TEXT(card, 2, "failed");
644 } while ((--cnt > 0) && rc);
645 if (rc) {
646 QETH_CARD_TEXT(card, 2, "FAILED");
647 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
648 dev_warn(&card->gdev->dev,
649 "Registering IP address %s failed\n", buf);
650 }
651 return rc;
652 }
653
qeth_l3_deregister_addr_entry(struct qeth_card * card,struct qeth_ipaddr * addr)654 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
655 struct qeth_ipaddr *addr)
656 {
657 int rc = 0;
658
659 if (card->options.sniffer)
660 return 0;
661
662 if (addr->proto == QETH_PROT_IPV4) {
663 QETH_CARD_TEXT(card, 2, "deladdr4");
664 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
665 } else if (addr->proto == QETH_PROT_IPV6) {
666 QETH_CARD_TEXT(card, 2, "deladdr6");
667 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
668 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
669 } else {
670 QETH_CARD_TEXT(card, 2, "deladdr?");
671 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
672 }
673 if (addr->is_multicast)
674 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
675 else
676 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
677 if (rc)
678 QETH_CARD_TEXT(card, 2, "failed");
679
680 return rc;
681 }
682
qeth_l3_setadapter_parms(struct qeth_card * card)683 static int qeth_l3_setadapter_parms(struct qeth_card *card)
684 {
685 int rc = 0;
686
687 QETH_CARD_TEXT(card, 2, "setadprm");
688
689 if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
690 rc = qeth_setadpparms_change_macaddr(card);
691 if (rc)
692 dev_warn(&card->gdev->dev, "Reading the adapter MAC"
693 " address failed\n");
694 }
695
696 return rc;
697 }
698
qeth_l3_start_ipa_arp_processing(struct qeth_card * card)699 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
700 {
701 int rc;
702
703 QETH_CARD_TEXT(card, 3, "ipaarp");
704
705 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
706 dev_info(&card->gdev->dev,
707 "ARP processing not supported on %s!\n",
708 netdev_name(card->dev));
709 return 0;
710 }
711 rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
712 IPA_CMD_ASS_START, NULL);
713 if (rc) {
714 dev_warn(&card->gdev->dev,
715 "Starting ARP processing support for %s failed\n",
716 netdev_name(card->dev));
717 }
718 return rc;
719 }
720
qeth_l3_start_ipa_source_mac(struct qeth_card * card)721 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
722 {
723 int rc;
724
725 QETH_CARD_TEXT(card, 3, "stsrcmac");
726
727 if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
728 dev_info(&card->gdev->dev,
729 "Inbound source MAC-address not supported on %s\n",
730 netdev_name(card->dev));
731 return -EOPNOTSUPP;
732 }
733
734 rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
735 IPA_CMD_ASS_START, NULL);
736 if (rc)
737 dev_warn(&card->gdev->dev,
738 "Starting source MAC-address support for %s failed\n",
739 netdev_name(card->dev));
740 return rc;
741 }
742
qeth_l3_start_ipa_vlan(struct qeth_card * card)743 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
744 {
745 int rc = 0;
746
747 QETH_CARD_TEXT(card, 3, "strtvlan");
748
749 if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
750 dev_info(&card->gdev->dev,
751 "VLAN not supported on %s\n", netdev_name(card->dev));
752 return -EOPNOTSUPP;
753 }
754
755 rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
756 IPA_CMD_ASS_START, NULL);
757 if (rc) {
758 dev_warn(&card->gdev->dev,
759 "Starting VLAN support for %s failed\n",
760 netdev_name(card->dev));
761 } else {
762 dev_info(&card->gdev->dev, "VLAN enabled\n");
763 }
764 return rc;
765 }
766
qeth_l3_start_ipa_multicast(struct qeth_card * card)767 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
768 {
769 int rc;
770
771 QETH_CARD_TEXT(card, 3, "stmcast");
772
773 if (!qeth_is_supported(card, IPA_MULTICASTING)) {
774 dev_info(&card->gdev->dev,
775 "Multicast not supported on %s\n",
776 netdev_name(card->dev));
777 return -EOPNOTSUPP;
778 }
779
780 rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
781 IPA_CMD_ASS_START, NULL);
782 if (rc) {
783 dev_warn(&card->gdev->dev,
784 "Starting multicast support for %s failed\n",
785 netdev_name(card->dev));
786 } else {
787 dev_info(&card->gdev->dev, "Multicast enabled\n");
788 card->dev->flags |= IFF_MULTICAST;
789 }
790 return rc;
791 }
792
qeth_l3_softsetup_ipv6(struct qeth_card * card)793 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
794 {
795 u32 ipv6_data = 3;
796 int rc;
797
798 QETH_CARD_TEXT(card, 3, "softipv6");
799
800 if (IS_IQD(card))
801 goto out;
802
803 rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
804 &ipv6_data);
805 if (rc) {
806 dev_err(&card->gdev->dev,
807 "Activating IPv6 support for %s failed\n",
808 netdev_name(card->dev));
809 return rc;
810 }
811 rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
812 NULL);
813 if (rc) {
814 dev_err(&card->gdev->dev,
815 "Activating IPv6 support for %s failed\n",
816 netdev_name(card->dev));
817 return rc;
818 }
819 rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
820 IPA_CMD_ASS_START, NULL);
821 if (rc) {
822 dev_warn(&card->gdev->dev,
823 "Enabling the passthrough mode for %s failed\n",
824 netdev_name(card->dev));
825 return rc;
826 }
827 out:
828 dev_info(&card->gdev->dev, "IPV6 enabled\n");
829 return 0;
830 }
831
qeth_l3_start_ipa_ipv6(struct qeth_card * card)832 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
833 {
834 QETH_CARD_TEXT(card, 3, "strtipv6");
835
836 if (!qeth_is_supported(card, IPA_IPV6)) {
837 dev_info(&card->gdev->dev,
838 "IPv6 not supported on %s\n", netdev_name(card->dev));
839 return 0;
840 }
841 return qeth_l3_softsetup_ipv6(card);
842 }
843
qeth_l3_start_ipa_broadcast(struct qeth_card * card)844 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
845 {
846 u32 filter_data = 1;
847 int rc;
848
849 QETH_CARD_TEXT(card, 3, "stbrdcst");
850 card->info.broadcast_capable = 0;
851 if (!qeth_is_supported(card, IPA_FILTERING)) {
852 dev_info(&card->gdev->dev,
853 "Broadcast not supported on %s\n",
854 netdev_name(card->dev));
855 rc = -EOPNOTSUPP;
856 goto out;
857 }
858 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
859 IPA_CMD_ASS_START, NULL);
860 if (rc) {
861 dev_warn(&card->gdev->dev,
862 "Enabling broadcast filtering for %s failed\n",
863 netdev_name(card->dev));
864 goto out;
865 }
866
867 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
868 IPA_CMD_ASS_CONFIGURE, &filter_data);
869 if (rc) {
870 dev_warn(&card->gdev->dev,
871 "Setting up broadcast filtering for %s failed\n",
872 netdev_name(card->dev));
873 goto out;
874 }
875 card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
876 dev_info(&card->gdev->dev, "Broadcast enabled\n");
877 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
878 IPA_CMD_ASS_ENABLE, &filter_data);
879 if (rc) {
880 dev_warn(&card->gdev->dev,
881 "Setting up broadcast echo filtering for %s failed\n",
882 netdev_name(card->dev));
883 goto out;
884 }
885 card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
886 out:
887 if (card->info.broadcast_capable)
888 card->dev->flags |= IFF_BROADCAST;
889 else
890 card->dev->flags &= ~IFF_BROADCAST;
891 return rc;
892 }
893
qeth_l3_start_ipassists(struct qeth_card * card)894 static void qeth_l3_start_ipassists(struct qeth_card *card)
895 {
896 QETH_CARD_TEXT(card, 3, "strtipas");
897
898 qeth_l3_start_ipa_arp_processing(card); /* go on*/
899 qeth_l3_start_ipa_source_mac(card); /* go on*/
900 qeth_l3_start_ipa_vlan(card); /* go on*/
901 qeth_l3_start_ipa_multicast(card); /* go on*/
902 qeth_l3_start_ipa_ipv6(card); /* go on*/
903 qeth_l3_start_ipa_broadcast(card); /* go on*/
904 }
905
qeth_l3_iqd_read_initial_mac_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)906 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
907 struct qeth_reply *reply, unsigned long data)
908 {
909 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
910
911 if (cmd->hdr.return_code)
912 return -EIO;
913 if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
914 return -EADDRNOTAVAIL;
915
916 eth_hw_addr_set(card->dev, cmd->data.create_destroy_addr.mac_addr);
917 return 0;
918 }
919
qeth_l3_iqd_read_initial_mac(struct qeth_card * card)920 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
921 {
922 int rc = 0;
923 struct qeth_cmd_buffer *iob;
924
925 QETH_CARD_TEXT(card, 2, "hsrmac");
926
927 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
928 IPA_DATA_SIZEOF(create_destroy_addr));
929 if (!iob)
930 return -ENOMEM;
931
932 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
933 NULL);
934 return rc;
935 }
936
qeth_l3_get_unique_id_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)937 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
938 struct qeth_reply *reply, unsigned long data)
939 {
940 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
941 u16 *uid = reply->param;
942
943 if (cmd->hdr.return_code == 0) {
944 *uid = cmd->data.create_destroy_addr.uid;
945 return 0;
946 }
947
948 dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
949 return -EIO;
950 }
951
qeth_l3_get_unique_id(struct qeth_card * card,u16 uid)952 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
953 {
954 struct qeth_cmd_buffer *iob;
955
956 QETH_CARD_TEXT(card, 2, "guniqeid");
957
958 if (!qeth_is_supported(card, IPA_IPV6))
959 goto out;
960
961 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
962 IPA_DATA_SIZEOF(create_destroy_addr));
963 if (!iob)
964 goto out;
965
966 __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
967 qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
968
969 out:
970 return uid;
971 }
972
973 static int
qeth_diags_trace_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)974 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
975 unsigned long data)
976 {
977 struct qeth_ipa_cmd *cmd;
978 __u16 rc;
979
980 QETH_CARD_TEXT(card, 2, "diastrcb");
981
982 cmd = (struct qeth_ipa_cmd *)data;
983 rc = cmd->hdr.return_code;
984 if (rc)
985 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
986 switch (cmd->data.diagass.action) {
987 case QETH_DIAGS_CMD_TRACE_QUERY:
988 break;
989 case QETH_DIAGS_CMD_TRACE_DISABLE:
990 switch (rc) {
991 case 0:
992 case IPA_RC_INVALID_SUBCMD:
993 card->info.promisc_mode = SET_PROMISC_MODE_OFF;
994 dev_info(&card->gdev->dev, "The HiperSockets network "
995 "traffic analyzer is deactivated\n");
996 break;
997 default:
998 break;
999 }
1000 break;
1001 case QETH_DIAGS_CMD_TRACE_ENABLE:
1002 switch (rc) {
1003 case 0:
1004 card->info.promisc_mode = SET_PROMISC_MODE_ON;
1005 dev_info(&card->gdev->dev, "The HiperSockets network "
1006 "traffic analyzer is activated\n");
1007 break;
1008 case IPA_RC_HARDWARE_AUTH_ERROR:
1009 dev_warn(&card->gdev->dev, "The device is not "
1010 "authorized to run as a HiperSockets network "
1011 "traffic analyzer\n");
1012 break;
1013 case IPA_RC_TRACE_ALREADY_ACTIVE:
1014 dev_warn(&card->gdev->dev, "A HiperSockets "
1015 "network traffic analyzer is already "
1016 "active in the HiperSockets LAN\n");
1017 break;
1018 default:
1019 break;
1020 }
1021 break;
1022 default:
1023 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1024 cmd->data.diagass.action, CARD_DEVID(card));
1025 }
1026
1027 return rc ? -EIO : 0;
1028 }
1029
1030 static int
qeth_diags_trace(struct qeth_card * card,enum qeth_diags_trace_cmds diags_cmd)1031 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1032 {
1033 struct qeth_cmd_buffer *iob;
1034 struct qeth_ipa_cmd *cmd;
1035
1036 QETH_CARD_TEXT(card, 2, "diagtrac");
1037
1038 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1039 if (!iob)
1040 return -ENOMEM;
1041 cmd = __ipa_cmd(iob);
1042 cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1043 cmd->data.diagass.action = diags_cmd;
1044 return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1045 }
1046
qeth_l3_add_mcast_rtnl(struct net_device * dev,int vid,void * arg)1047 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1048 {
1049 struct qeth_card *card = arg;
1050 struct inet6_dev *in6_dev;
1051 struct in_device *in4_dev;
1052 struct qeth_ipaddr *ipm;
1053 struct qeth_ipaddr tmp;
1054 struct ip_mc_list *im4;
1055 struct ifmcaddr6 *im6;
1056
1057 QETH_CARD_TEXT(card, 4, "addmc");
1058
1059 if (!dev || !(dev->flags & IFF_UP))
1060 goto out;
1061
1062 in4_dev = __in_dev_get_rtnl(dev);
1063 if (!in4_dev)
1064 goto walk_ipv6;
1065
1066 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1067 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1068 tmp.is_multicast = 1;
1069
1070 for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1071 im4 = rtnl_dereference(im4->next_rcu)) {
1072 tmp.u.a4.addr = im4->multiaddr;
1073
1074 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1075 if (ipm) {
1076 /* for mcast, by-IP match means full match */
1077 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1078 continue;
1079 }
1080
1081 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1082 if (!ipm)
1083 continue;
1084
1085 hash_add(card->rx_mode_addrs, &ipm->hnode,
1086 qeth_l3_ipaddr_hash(ipm));
1087 }
1088
1089 walk_ipv6:
1090 if (!qeth_is_supported(card, IPA_IPV6))
1091 goto out;
1092
1093 in6_dev = __in6_dev_get(dev);
1094 if (!in6_dev)
1095 goto out;
1096
1097 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1098 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1099 tmp.is_multicast = 1;
1100
1101 for (im6 = rtnl_dereference(in6_dev->mc_list);
1102 im6;
1103 im6 = rtnl_dereference(im6->next)) {
1104 tmp.u.a6.addr = im6->mca_addr;
1105
1106 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1107 if (ipm) {
1108 /* for mcast, by-IP match means full match */
1109 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1110 continue;
1111 }
1112
1113 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1114 if (!ipm)
1115 continue;
1116
1117 hash_add(card->rx_mode_addrs, &ipm->hnode,
1118 qeth_l3_ipaddr_hash(ipm));
1119
1120 }
1121
1122 out:
1123 return 0;
1124 }
1125
qeth_l3_set_promisc_mode(struct qeth_card * card)1126 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1127 {
1128 bool enable = card->dev->flags & IFF_PROMISC;
1129
1130 if (card->info.promisc_mode == enable)
1131 return;
1132
1133 if (IS_VM_NIC(card)) { /* Guestlan trace */
1134 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1135 qeth_setadp_promisc_mode(card, enable);
1136 } else if (card->options.sniffer && /* HiperSockets trace */
1137 qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1138 if (enable) {
1139 QETH_CARD_TEXT(card, 3, "+promisc");
1140 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1141 } else {
1142 QETH_CARD_TEXT(card, 3, "-promisc");
1143 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1144 }
1145 }
1146 }
1147
qeth_l3_rx_mode_work(struct work_struct * work)1148 static void qeth_l3_rx_mode_work(struct work_struct *work)
1149 {
1150 struct qeth_card *card = container_of(work, struct qeth_card,
1151 rx_mode_work);
1152 struct qeth_ipaddr *addr;
1153 struct hlist_node *tmp;
1154 int i, rc;
1155
1156 QETH_CARD_TEXT(card, 3, "setmulti");
1157
1158 if (!card->options.sniffer) {
1159 rtnl_lock();
1160 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1161 if (qeth_is_supported(card, IPA_FULL_VLAN))
1162 vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1163 rtnl_unlock();
1164
1165 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1166 switch (addr->disp_flag) {
1167 case QETH_DISP_ADDR_DELETE:
1168 rc = qeth_l3_deregister_addr_entry(card, addr);
1169 if (!rc || rc == -ENOENT) {
1170 hash_del(&addr->hnode);
1171 kfree(addr);
1172 }
1173 break;
1174 case QETH_DISP_ADDR_ADD:
1175 rc = qeth_l3_register_addr_entry(card, addr);
1176 if (rc && rc != -ENETDOWN) {
1177 hash_del(&addr->hnode);
1178 kfree(addr);
1179 break;
1180 }
1181 fallthrough;
1182 default:
1183 /* for next call to set_rx_mode(): */
1184 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1185 }
1186 }
1187 }
1188
1189 qeth_l3_set_promisc_mode(card);
1190 }
1191
qeth_l3_arp_makerc(u16 rc)1192 static int qeth_l3_arp_makerc(u16 rc)
1193 {
1194 switch (rc) {
1195 case IPA_RC_SUCCESS:
1196 return 0;
1197 case QETH_IPA_ARP_RC_NOTSUPP:
1198 case QETH_IPA_ARP_RC_Q_NOTSUPP:
1199 return -EOPNOTSUPP;
1200 case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1201 return -EINVAL;
1202 case QETH_IPA_ARP_RC_Q_NO_DATA:
1203 return -ENOENT;
1204 default:
1205 return -EIO;
1206 }
1207 }
1208
qeth_l3_arp_cmd_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1209 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1210 unsigned long data)
1211 {
1212 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1213
1214 qeth_setassparms_cb(card, reply, data);
1215 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1216 }
1217
qeth_l3_arp_set_no_entries(struct qeth_card * card,int no_entries)1218 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1219 {
1220 struct qeth_cmd_buffer *iob;
1221 int rc;
1222
1223 QETH_CARD_TEXT(card, 3, "arpstnoe");
1224
1225 /*
1226 * currently GuestLAN only supports the ARP assist function
1227 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1228 * thus we say EOPNOTSUPP for this ARP function
1229 */
1230 if (IS_VM_NIC(card))
1231 return -EOPNOTSUPP;
1232 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1233 return -EOPNOTSUPP;
1234 }
1235
1236 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1237 IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1238 SETASS_DATA_SIZEOF(flags_32bit),
1239 QETH_PROT_IPV4);
1240 if (!iob)
1241 return -ENOMEM;
1242
1243 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1244 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1245 if (rc)
1246 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1247 CARD_DEVID(card), rc);
1248 return rc;
1249 }
1250
get_arp_entry_size(struct qeth_card * card,struct qeth_arp_query_data * qdata,struct qeth_arp_entrytype * type,__u8 strip_entries)1251 static __u32 get_arp_entry_size(struct qeth_card *card,
1252 struct qeth_arp_query_data *qdata,
1253 struct qeth_arp_entrytype *type, __u8 strip_entries)
1254 {
1255 __u32 rc;
1256 __u8 is_hsi;
1257
1258 is_hsi = qdata->reply_bits == 5;
1259 if (type->ip == QETHARP_IP_ADDR_V4) {
1260 QETH_CARD_TEXT(card, 4, "arpev4");
1261 if (strip_entries) {
1262 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1263 sizeof(struct qeth_arp_qi_entry7_short);
1264 } else {
1265 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1266 sizeof(struct qeth_arp_qi_entry7);
1267 }
1268 } else if (type->ip == QETHARP_IP_ADDR_V6) {
1269 QETH_CARD_TEXT(card, 4, "arpev6");
1270 if (strip_entries) {
1271 rc = is_hsi ?
1272 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1273 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1274 } else {
1275 rc = is_hsi ?
1276 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1277 sizeof(struct qeth_arp_qi_entry7_ipv6);
1278 }
1279 } else {
1280 QETH_CARD_TEXT(card, 4, "arpinv");
1281 rc = 0;
1282 }
1283
1284 return rc;
1285 }
1286
arpentry_matches_prot(struct qeth_arp_entrytype * type,__u16 prot)1287 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1288 {
1289 return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1290 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1291 }
1292
qeth_l3_arp_query_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1293 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1294 struct qeth_reply *reply, unsigned long data)
1295 {
1296 struct qeth_ipa_cmd *cmd;
1297 struct qeth_arp_query_data *qdata;
1298 struct qeth_arp_query_info *qinfo;
1299 int e;
1300 int entrybytes_done;
1301 int stripped_bytes;
1302 __u8 do_strip_entries;
1303
1304 QETH_CARD_TEXT(card, 3, "arpquecb");
1305
1306 qinfo = (struct qeth_arp_query_info *) reply->param;
1307 cmd = (struct qeth_ipa_cmd *) data;
1308 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1309 if (cmd->hdr.return_code) {
1310 QETH_CARD_TEXT(card, 4, "arpcberr");
1311 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1312 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1313 }
1314 if (cmd->data.setassparms.hdr.return_code) {
1315 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1316 QETH_CARD_TEXT(card, 4, "setaperr");
1317 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1318 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1319 }
1320 qdata = &cmd->data.setassparms.data.query_arp;
1321 QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1322
1323 do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1324 stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1325 entrybytes_done = 0;
1326 for (e = 0; e < qdata->no_entries; ++e) {
1327 char *cur_entry;
1328 __u32 esize;
1329 struct qeth_arp_entrytype *etype;
1330
1331 cur_entry = &qdata->data + entrybytes_done;
1332 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1333 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1334 QETH_CARD_TEXT(card, 4, "pmis");
1335 QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1336 break;
1337 }
1338 esize = get_arp_entry_size(card, qdata, etype,
1339 do_strip_entries);
1340 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1341 if (!esize)
1342 break;
1343
1344 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1345 QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1346 memset(qinfo->udata, 0, 4);
1347 return -ENOSPC;
1348 }
1349
1350 memcpy(qinfo->udata + qinfo->udata_offset,
1351 &qdata->data + entrybytes_done + stripped_bytes,
1352 esize);
1353 entrybytes_done += esize + stripped_bytes;
1354 qinfo->udata_offset += esize;
1355 ++qinfo->no_entries;
1356 }
1357 /* check if all replies received ... */
1358 if (cmd->data.setassparms.hdr.seq_no <
1359 cmd->data.setassparms.hdr.number_of_replies)
1360 return 1;
1361 QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1362 memcpy(qinfo->udata, &qinfo->no_entries, 4);
1363 /* keep STRIP_ENTRIES flag so the user program can distinguish
1364 * stripped entries from normal ones */
1365 if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1366 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1367 memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1368 QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1369 return 0;
1370 }
1371
qeth_l3_query_arp_cache_info(struct qeth_card * card,enum qeth_prot_versions prot,struct qeth_arp_query_info * qinfo)1372 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1373 enum qeth_prot_versions prot,
1374 struct qeth_arp_query_info *qinfo)
1375 {
1376 struct qeth_cmd_buffer *iob;
1377 struct qeth_ipa_cmd *cmd;
1378 int rc;
1379
1380 QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1381
1382 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1383 IPA_CMD_ASS_ARP_QUERY_INFO,
1384 SETASS_DATA_SIZEOF(query_arp), prot);
1385 if (!iob)
1386 return -ENOMEM;
1387 cmd = __ipa_cmd(iob);
1388 cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1389 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1390 if (rc)
1391 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1392 CARD_DEVID(card), rc);
1393 return rc;
1394 }
1395
qeth_l3_arp_query(struct qeth_card * card,char __user * udata)1396 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1397 {
1398 struct qeth_arp_query_info qinfo = {0, };
1399 int rc;
1400
1401 QETH_CARD_TEXT(card, 3, "arpquery");
1402
1403 if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1404 IPA_ARP_PROCESSING)) {
1405 QETH_CARD_TEXT(card, 3, "arpqnsup");
1406 rc = -EOPNOTSUPP;
1407 goto out;
1408 }
1409 /* get size of userspace buffer and mask_bits -> 6 bytes */
1410 if (copy_from_user(&qinfo, udata, 6)) {
1411 rc = -EFAULT;
1412 goto out;
1413 }
1414 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1415 if (!qinfo.udata) {
1416 rc = -ENOMEM;
1417 goto out;
1418 }
1419 qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1420 rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1421 if (rc) {
1422 if (copy_to_user(udata, qinfo.udata, 4))
1423 rc = -EFAULT;
1424 goto free_and_out;
1425 }
1426 if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1427 /* fails in case of GuestLAN QDIO mode */
1428 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1429 }
1430 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1431 QETH_CARD_TEXT(card, 4, "qactf");
1432 rc = -EFAULT;
1433 goto free_and_out;
1434 }
1435 QETH_CARD_TEXT(card, 4, "qacts");
1436
1437 free_and_out:
1438 kfree(qinfo.udata);
1439 out:
1440 return rc;
1441 }
1442
qeth_l3_arp_modify_entry(struct qeth_card * card,struct qeth_arp_cache_entry * entry,enum qeth_arp_process_subcmds arp_cmd)1443 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1444 struct qeth_arp_cache_entry *entry,
1445 enum qeth_arp_process_subcmds arp_cmd)
1446 {
1447 struct qeth_arp_cache_entry *cmd_entry;
1448 struct qeth_cmd_buffer *iob;
1449 int rc;
1450
1451 if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1452 QETH_CARD_TEXT(card, 3, "arpadd");
1453 else
1454 QETH_CARD_TEXT(card, 3, "arpdel");
1455
1456 /*
1457 * currently GuestLAN only supports the ARP assist function
1458 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1459 * thus we say EOPNOTSUPP for this ARP function
1460 */
1461 if (IS_VM_NIC(card))
1462 return -EOPNOTSUPP;
1463 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1464 return -EOPNOTSUPP;
1465 }
1466
1467 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1468 SETASS_DATA_SIZEOF(arp_entry),
1469 QETH_PROT_IPV4);
1470 if (!iob)
1471 return -ENOMEM;
1472
1473 cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1474 ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1475 memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1476 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1477 if (rc)
1478 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1479 arp_cmd, CARD_DEVID(card), rc);
1480 return rc;
1481 }
1482
qeth_l3_arp_flush_cache(struct qeth_card * card)1483 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1484 {
1485 struct qeth_cmd_buffer *iob;
1486 int rc;
1487
1488 QETH_CARD_TEXT(card, 3, "arpflush");
1489
1490 /*
1491 * currently GuestLAN only supports the ARP assist function
1492 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1493 * thus we say EOPNOTSUPP for this ARP function
1494 */
1495 if (IS_VM_NIC(card) || IS_IQD(card))
1496 return -EOPNOTSUPP;
1497 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1498 return -EOPNOTSUPP;
1499 }
1500
1501 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1502 IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1503 QETH_PROT_IPV4);
1504 if (!iob)
1505 return -ENOMEM;
1506
1507 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1508 if (rc)
1509 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1510 CARD_DEVID(card), rc);
1511 return rc;
1512 }
1513
qeth_l3_ndo_siocdevprivate(struct net_device * dev,struct ifreq * rq,void __user * data,int cmd)1514 static int qeth_l3_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1515 void __user *data, int cmd)
1516 {
1517 struct qeth_card *card = dev->ml_priv;
1518 struct qeth_arp_cache_entry arp_entry;
1519 enum qeth_arp_process_subcmds arp_cmd;
1520 int rc = 0;
1521
1522 switch (cmd) {
1523 case SIOC_QETH_ARP_SET_NO_ENTRIES:
1524 if (!capable(CAP_NET_ADMIN)) {
1525 rc = -EPERM;
1526 break;
1527 }
1528 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1529 break;
1530 case SIOC_QETH_ARP_QUERY_INFO:
1531 if (!capable(CAP_NET_ADMIN)) {
1532 rc = -EPERM;
1533 break;
1534 }
1535 rc = qeth_l3_arp_query(card, data);
1536 break;
1537 case SIOC_QETH_ARP_ADD_ENTRY:
1538 case SIOC_QETH_ARP_REMOVE_ENTRY:
1539 if (!capable(CAP_NET_ADMIN))
1540 return -EPERM;
1541 if (copy_from_user(&arp_entry, data, sizeof(arp_entry)))
1542 return -EFAULT;
1543
1544 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1545 IPA_CMD_ASS_ARP_ADD_ENTRY :
1546 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1547 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1548 case SIOC_QETH_ARP_FLUSH_CACHE:
1549 if (!capable(CAP_NET_ADMIN)) {
1550 rc = -EPERM;
1551 break;
1552 }
1553 rc = qeth_l3_arp_flush_cache(card);
1554 break;
1555 default:
1556 rc = qeth_siocdevprivate(dev, rq, data, cmd);
1557 }
1558 return rc;
1559 }
1560
qeth_l3_get_cast_type_rcu(struct sk_buff * skb,struct dst_entry * dst,__be16 proto)1561 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1562 __be16 proto)
1563 {
1564 struct neighbour *n = NULL;
1565
1566 if (dst)
1567 n = dst_neigh_lookup_skb(dst, skb);
1568
1569 if (n) {
1570 int cast_type = n->type;
1571
1572 neigh_release(n);
1573 if ((cast_type == RTN_BROADCAST) ||
1574 (cast_type == RTN_MULTICAST) ||
1575 (cast_type == RTN_ANYCAST))
1576 return cast_type;
1577 return RTN_UNICAST;
1578 }
1579
1580 /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1581 switch (proto) {
1582 case htons(ETH_P_IP):
1583 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1584 return RTN_BROADCAST;
1585 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1586 RTN_MULTICAST : RTN_UNICAST;
1587 case htons(ETH_P_IPV6):
1588 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1589 RTN_MULTICAST : RTN_UNICAST;
1590 case htons(ETH_P_AF_IUCV):
1591 return RTN_UNICAST;
1592 default:
1593 /* OSA only: ... and MAC address */
1594 return qeth_get_ether_cast_type(skb);
1595 }
1596 }
1597
qeth_l3_get_cast_type(struct sk_buff * skb,__be16 proto)1598 static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1599 {
1600 struct dst_entry *dst;
1601 int cast_type;
1602
1603 rcu_read_lock();
1604 dst = qeth_dst_check_rcu(skb, proto);
1605 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1606 rcu_read_unlock();
1607
1608 return cast_type;
1609 }
1610
qeth_l3_cast_type_to_flag(int cast_type)1611 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1612 {
1613 if (cast_type == RTN_MULTICAST)
1614 return QETH_CAST_MULTICAST;
1615 if (cast_type == RTN_ANYCAST)
1616 return QETH_CAST_ANYCAST;
1617 if (cast_type == RTN_BROADCAST)
1618 return QETH_CAST_BROADCAST;
1619 return QETH_CAST_UNICAST;
1620 }
1621
qeth_l3_fill_header(struct qeth_qdio_out_q * queue,struct qeth_hdr * hdr,struct sk_buff * skb,__be16 proto,unsigned int data_len)1622 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1623 struct qeth_hdr *hdr, struct sk_buff *skb,
1624 __be16 proto, unsigned int data_len)
1625 {
1626 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1627 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1628 struct qeth_card *card = queue->card;
1629 struct dst_entry *dst;
1630 int cast_type;
1631
1632 hdr->hdr.l3.length = data_len;
1633
1634 if (skb_is_gso(skb)) {
1635 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1636 } else {
1637 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1638
1639 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1640 qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto);
1641 /* some HW requires combined L3+L4 csum offload: */
1642 if (proto == htons(ETH_P_IP))
1643 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1644 }
1645 }
1646
1647 if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1648 /* NETIF_F_HW_VLAN_CTAG_TX */
1649 if (skb_vlan_tag_present(skb)) {
1650 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1651 hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1652 }
1653 } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1654 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1655 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1656 }
1657
1658 rcu_read_lock();
1659 dst = qeth_dst_check_rcu(skb, proto);
1660
1661 if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1662 cast_type = RTN_UNICAST;
1663 else
1664 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1665 l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1666
1667 switch (proto) {
1668 case htons(ETH_P_IP):
1669 l3_hdr->next_hop.addr.s6_addr32[3] =
1670 qeth_next_hop_v4_rcu(skb, dst);
1671 break;
1672 case htons(ETH_P_IPV6):
1673 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1674
1675 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1676 if (!IS_IQD(card))
1677 hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1678 break;
1679 case htons(ETH_P_AF_IUCV):
1680 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1681 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1682 iucv_trans_hdr(skb)->destUserID, 8);
1683 l3_hdr->flags |= QETH_HDR_IPV6;
1684 break;
1685 default:
1686 /* OSA only: */
1687 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1688 }
1689 rcu_read_unlock();
1690 }
1691
qeth_l3_fixup_headers(struct sk_buff * skb)1692 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1693 {
1694 struct iphdr *iph = ip_hdr(skb);
1695
1696 /* this is safe, IPv6 traffic takes a different path */
1697 if (skb->ip_summed == CHECKSUM_PARTIAL)
1698 iph->check = 0;
1699 if (skb_is_gso(skb)) {
1700 iph->tot_len = 0;
1701 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1702 iph->daddr, 0);
1703 }
1704 }
1705
qeth_l3_xmit(struct qeth_card * card,struct sk_buff * skb,struct qeth_qdio_out_q * queue,__be16 proto)1706 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1707 struct qeth_qdio_out_q *queue, __be16 proto)
1708 {
1709 unsigned int hw_hdr_len;
1710 int rc;
1711
1712 /* re-use the L2 header area for the HW header: */
1713 hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1714 sizeof(struct qeth_hdr);
1715 rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1716 if (rc)
1717 return rc;
1718 skb_pull(skb, ETH_HLEN);
1719
1720 qeth_l3_fixup_headers(skb);
1721 return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1722 }
1723
qeth_l3_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)1724 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1725 struct net_device *dev)
1726 {
1727 struct qeth_card *card = dev->ml_priv;
1728 __be16 proto = vlan_get_protocol(skb);
1729 u16 txq = skb_get_queue_mapping(skb);
1730 struct qeth_qdio_out_q *queue;
1731 int rc;
1732
1733 if (!skb_is_gso(skb))
1734 qdisc_skb_cb(skb)->pkt_len = skb->len;
1735 if (IS_IQD(card)) {
1736 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1737
1738 if (card->options.sniffer)
1739 goto tx_drop;
1740
1741 switch (proto) {
1742 case htons(ETH_P_AF_IUCV):
1743 if (card->options.cq != QETH_CQ_ENABLED)
1744 goto tx_drop;
1745 break;
1746 case htons(ETH_P_IP):
1747 case htons(ETH_P_IPV6):
1748 if (card->options.cq == QETH_CQ_ENABLED)
1749 goto tx_drop;
1750 break;
1751 default:
1752 goto tx_drop;
1753 }
1754 } else {
1755 queue = card->qdio.out_qs[txq];
1756 }
1757
1758 if (!(dev->flags & IFF_BROADCAST) &&
1759 qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1760 goto tx_drop;
1761
1762 if (proto == htons(ETH_P_IP) || IS_IQD(card))
1763 rc = qeth_l3_xmit(card, skb, queue, proto);
1764 else
1765 rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1766
1767 if (!rc)
1768 return NETDEV_TX_OK;
1769
1770 tx_drop:
1771 QETH_TXQ_STAT_INC(queue, tx_dropped);
1772 kfree_skb(skb);
1773 return NETDEV_TX_OK;
1774 }
1775
qeth_l3_set_rx_mode(struct net_device * dev)1776 static void qeth_l3_set_rx_mode(struct net_device *dev)
1777 {
1778 struct qeth_card *card = dev->ml_priv;
1779
1780 schedule_work(&card->rx_mode_work);
1781 }
1782
1783 /*
1784 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1785 * NOARP on the netdevice is no option because it also turns off neighbor
1786 * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1787 * arp resolution but we want the hard header (packet socket will work
1788 * e.g. tcpdump)
1789 */
qeth_l3_neigh_setup_noarp(struct neighbour * n)1790 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1791 {
1792 n->nud_state = NUD_NOARP;
1793 memcpy(n->ha, "FAKELL", 6);
1794 n->output = n->ops->connected_output;
1795 return 0;
1796 }
1797
1798 static int
qeth_l3_neigh_setup(struct net_device * dev,struct neigh_parms * np)1799 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1800 {
1801 if (np->tbl->family == AF_INET)
1802 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1803
1804 return 0;
1805 }
1806
qeth_l3_osa_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)1807 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1808 struct net_device *dev,
1809 netdev_features_t features)
1810 {
1811 if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1812 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1813 return qeth_features_check(skb, dev, features);
1814 }
1815
qeth_l3_iqd_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1816 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1817 struct net_device *sb_dev)
1818 {
1819 __be16 proto = vlan_get_protocol(skb);
1820
1821 return qeth_iqd_select_queue(dev, skb,
1822 qeth_l3_get_cast_type(skb, proto), sb_dev);
1823 }
1824
1825 static const struct net_device_ops qeth_l3_netdev_ops = {
1826 .ndo_open = qeth_open,
1827 .ndo_stop = qeth_stop,
1828 .ndo_get_stats64 = qeth_get_stats64,
1829 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1830 .ndo_select_queue = qeth_l3_iqd_select_queue,
1831 .ndo_validate_addr = eth_validate_addr,
1832 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1833 .ndo_eth_ioctl = qeth_do_ioctl,
1834 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate,
1835 .ndo_fix_features = qeth_fix_features,
1836 .ndo_set_features = qeth_set_features,
1837 .ndo_tx_timeout = qeth_tx_timeout,
1838 };
1839
1840 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1841 .ndo_open = qeth_open,
1842 .ndo_stop = qeth_stop,
1843 .ndo_get_stats64 = qeth_get_stats64,
1844 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1845 .ndo_features_check = qeth_l3_osa_features_check,
1846 .ndo_select_queue = qeth_osa_select_queue,
1847 .ndo_validate_addr = eth_validate_addr,
1848 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1849 .ndo_eth_ioctl = qeth_do_ioctl,
1850 .ndo_siocdevprivate = qeth_l3_ndo_siocdevprivate,
1851 .ndo_fix_features = qeth_fix_features,
1852 .ndo_set_features = qeth_set_features,
1853 .ndo_tx_timeout = qeth_tx_timeout,
1854 .ndo_neigh_setup = qeth_l3_neigh_setup,
1855 };
1856
qeth_l3_setup_netdev(struct qeth_card * card)1857 static int qeth_l3_setup_netdev(struct qeth_card *card)
1858 {
1859 struct net_device *dev = card->dev;
1860 unsigned int headroom;
1861 int rc;
1862
1863 if (IS_OSD(card) || IS_OSX(card)) {
1864 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1865
1866 /*IPv6 address autoconfiguration stuff*/
1867 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1868
1869 if (!IS_VM_NIC(card)) {
1870 card->dev->features |= NETIF_F_SG;
1871 card->dev->hw_features |= NETIF_F_TSO |
1872 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1873 card->dev->vlan_features |= NETIF_F_TSO |
1874 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1875 }
1876
1877 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1878 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1879 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1880 }
1881 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1882 card->dev->hw_features |= NETIF_F_TSO6;
1883 card->dev->vlan_features |= NETIF_F_TSO6;
1884 }
1885
1886 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1887 if (card->dev->hw_features & NETIF_F_TSO6)
1888 headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1889 else if (card->dev->hw_features & NETIF_F_TSO)
1890 headroom = sizeof(struct qeth_hdr_tso);
1891 else
1892 headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1893 } else if (IS_IQD(card)) {
1894 card->dev->flags |= IFF_NOARP;
1895 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1896 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1897
1898 rc = qeth_l3_iqd_read_initial_mac(card);
1899 if (rc)
1900 return rc;
1901 } else
1902 return -ENODEV;
1903
1904 card->dev->needed_headroom = headroom;
1905 card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1906 NETIF_F_HW_VLAN_CTAG_RX;
1907
1908 netif_keep_dst(card->dev);
1909 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1910 netif_set_tso_max_size(card->dev,
1911 PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1912
1913 netif_napi_add(card->dev, &card->napi, qeth_poll, NAPI_POLL_WEIGHT);
1914 return register_netdev(card->dev);
1915 }
1916
1917 static const struct device_type qeth_l3_devtype = {
1918 .name = "qeth_layer3",
1919 .groups = qeth_l3_attr_groups,
1920 };
1921
qeth_l3_probe_device(struct ccwgroup_device * gdev)1922 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1923 {
1924 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1925 int rc;
1926
1927 hash_init(card->ip_htable);
1928 mutex_init(&card->ip_lock);
1929 card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1930 dev_name(&gdev->dev));
1931 if (!card->cmd_wq)
1932 return -ENOMEM;
1933
1934 if (gdev->dev.type) {
1935 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1936 if (rc) {
1937 destroy_workqueue(card->cmd_wq);
1938 return rc;
1939 }
1940 } else {
1941 gdev->dev.type = &qeth_l3_devtype;
1942 }
1943
1944 INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1945 return 0;
1946 }
1947
qeth_l3_remove_device(struct ccwgroup_device * cgdev)1948 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1949 {
1950 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1951
1952 if (cgdev->dev.type != &qeth_l3_devtype)
1953 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1954
1955 qeth_set_allowed_threads(card, 0, 1);
1956 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1957
1958 if (cgdev->state == CCWGROUP_ONLINE)
1959 qeth_set_offline(card, card->discipline, false);
1960
1961 if (card->dev->reg_state == NETREG_REGISTERED)
1962 unregister_netdev(card->dev);
1963
1964 destroy_workqueue(card->cmd_wq);
1965 qeth_l3_clear_ip_htable(card, 0);
1966 qeth_l3_clear_ipato_list(card);
1967 }
1968
qeth_l3_set_online(struct qeth_card * card,bool carrier_ok)1969 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1970 {
1971 struct net_device *dev = card->dev;
1972 int rc = 0;
1973
1974 /* softsetup */
1975 QETH_CARD_TEXT(card, 2, "softsetp");
1976
1977 rc = qeth_l3_setadapter_parms(card);
1978 if (rc)
1979 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1980 if (!card->options.sniffer) {
1981 qeth_l3_start_ipassists(card);
1982
1983 rc = qeth_l3_setrouting_v4(card);
1984 if (rc)
1985 QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1986 rc = qeth_l3_setrouting_v6(card);
1987 if (rc)
1988 QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
1989 }
1990
1991 card->state = CARD_STATE_SOFTSETUP;
1992
1993 qeth_set_allowed_threads(card, 0xffffffff, 0);
1994 qeth_l3_recover_ip(card);
1995
1996 if (dev->reg_state != NETREG_REGISTERED) {
1997 rc = qeth_l3_setup_netdev(card);
1998 if (rc)
1999 goto err_setup;
2000
2001 if (carrier_ok)
2002 netif_carrier_on(dev);
2003 } else {
2004 rtnl_lock();
2005 rc = qeth_set_real_num_tx_queues(card,
2006 qeth_tx_actual_queues(card));
2007 if (rc) {
2008 rtnl_unlock();
2009 goto err_set_queues;
2010 }
2011
2012 if (carrier_ok)
2013 netif_carrier_on(dev);
2014 else
2015 netif_carrier_off(dev);
2016
2017 netif_device_attach(dev);
2018 qeth_enable_hw_features(dev);
2019
2020 if (card->info.open_when_online) {
2021 card->info.open_when_online = 0;
2022 dev_open(dev, NULL);
2023 }
2024 rtnl_unlock();
2025 }
2026 return 0;
2027
2028 err_set_queues:
2029 err_setup:
2030 qeth_set_allowed_threads(card, 0, 1);
2031 card->state = CARD_STATE_DOWN;
2032 qeth_l3_clear_ip_htable(card, 1);
2033 return rc;
2034 }
2035
qeth_l3_set_offline(struct qeth_card * card)2036 static void qeth_l3_set_offline(struct qeth_card *card)
2037 {
2038 qeth_set_allowed_threads(card, 0, 1);
2039 qeth_l3_drain_rx_mode_cache(card);
2040
2041 if (card->options.sniffer &&
2042 (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2043 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2044
2045 if (card->state == CARD_STATE_SOFTSETUP) {
2046 card->state = CARD_STATE_DOWN;
2047 qeth_l3_clear_ip_htable(card, 1);
2048 }
2049 }
2050
2051 /* Returns zero if the command is successfully "consumed" */
qeth_l3_control_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)2052 static int qeth_l3_control_event(struct qeth_card *card,
2053 struct qeth_ipa_cmd *cmd)
2054 {
2055 return 1;
2056 }
2057
2058 const struct qeth_discipline qeth_l3_discipline = {
2059 .setup = qeth_l3_probe_device,
2060 .remove = qeth_l3_remove_device,
2061 .set_online = qeth_l3_set_online,
2062 .set_offline = qeth_l3_set_offline,
2063 .control_event_handler = qeth_l3_control_event,
2064 };
2065 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2066
qeth_l3_handle_ip_event(struct qeth_card * card,struct qeth_ipaddr * addr,unsigned long event)2067 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2068 struct qeth_ipaddr *addr,
2069 unsigned long event)
2070 {
2071 switch (event) {
2072 case NETDEV_UP:
2073 qeth_l3_modify_ip(card, addr, true);
2074 return NOTIFY_OK;
2075 case NETDEV_DOWN:
2076 qeth_l3_modify_ip(card, addr, false);
2077 return NOTIFY_OK;
2078 default:
2079 return NOTIFY_DONE;
2080 }
2081 }
2082
2083 struct qeth_l3_ip_event_work {
2084 struct work_struct work;
2085 struct qeth_card *card;
2086 struct qeth_ipaddr addr;
2087 };
2088
2089 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2090
qeth_l3_add_ip_worker(struct work_struct * work)2091 static void qeth_l3_add_ip_worker(struct work_struct *work)
2092 {
2093 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2094
2095 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2096 kfree(work);
2097 }
2098
qeth_l3_delete_ip_worker(struct work_struct * work)2099 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2100 {
2101 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2102
2103 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2104 kfree(work);
2105 }
2106
qeth_l3_get_card_from_dev(struct net_device * dev)2107 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2108 {
2109 if (is_vlan_dev(dev))
2110 dev = vlan_dev_real_dev(dev);
2111 if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2112 dev->netdev_ops == &qeth_l3_netdev_ops)
2113 return (struct qeth_card *) dev->ml_priv;
2114 return NULL;
2115 }
2116
qeth_l3_ip_event(struct notifier_block * this,unsigned long event,void * ptr)2117 static int qeth_l3_ip_event(struct notifier_block *this,
2118 unsigned long event, void *ptr)
2119 {
2120 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2121 struct net_device *dev = ifa->ifa_dev->dev;
2122 struct qeth_ipaddr addr;
2123 struct qeth_card *card;
2124
2125 card = qeth_l3_get_card_from_dev(dev);
2126 if (!card)
2127 return NOTIFY_DONE;
2128 QETH_CARD_TEXT(card, 3, "ipevent");
2129
2130 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2131 addr.u.a4.addr = ifa->ifa_address;
2132 addr.u.a4.mask = ifa->ifa_mask;
2133
2134 return qeth_l3_handle_ip_event(card, &addr, event);
2135 }
2136
2137 static struct notifier_block qeth_l3_ip_notifier = {
2138 qeth_l3_ip_event,
2139 NULL,
2140 };
2141
qeth_l3_ip6_event(struct notifier_block * this,unsigned long event,void * ptr)2142 static int qeth_l3_ip6_event(struct notifier_block *this,
2143 unsigned long event, void *ptr)
2144 {
2145 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2146 struct net_device *dev = ifa->idev->dev;
2147 struct qeth_l3_ip_event_work *ip_work;
2148 struct qeth_card *card;
2149
2150 if (event != NETDEV_UP && event != NETDEV_DOWN)
2151 return NOTIFY_DONE;
2152
2153 card = qeth_l3_get_card_from_dev(dev);
2154 if (!card)
2155 return NOTIFY_DONE;
2156 QETH_CARD_TEXT(card, 3, "ip6event");
2157 if (!qeth_is_supported(card, IPA_IPV6))
2158 return NOTIFY_DONE;
2159
2160 ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2161 if (!ip_work)
2162 return NOTIFY_DONE;
2163
2164 if (event == NETDEV_UP)
2165 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2166 else
2167 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2168
2169 ip_work->card = card;
2170 qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2171 QETH_PROT_IPV6);
2172 ip_work->addr.u.a6.addr = ifa->addr;
2173 ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2174
2175 queue_work(card->cmd_wq, &ip_work->work);
2176 return NOTIFY_OK;
2177 }
2178
2179 static struct notifier_block qeth_l3_ip6_notifier = {
2180 qeth_l3_ip6_event,
2181 NULL,
2182 };
2183
qeth_l3_register_notifiers(void)2184 static int qeth_l3_register_notifiers(void)
2185 {
2186 int rc;
2187
2188 QETH_DBF_TEXT(SETUP, 5, "regnotif");
2189 rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2190 if (rc)
2191 return rc;
2192 rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2193 if (rc) {
2194 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2195 return rc;
2196 }
2197 return 0;
2198 }
2199
qeth_l3_unregister_notifiers(void)2200 static void qeth_l3_unregister_notifiers(void)
2201 {
2202 QETH_DBF_TEXT(SETUP, 5, "unregnot");
2203 WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2204 WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2205 }
2206
qeth_l3_init(void)2207 static int __init qeth_l3_init(void)
2208 {
2209 pr_info("register layer 3 discipline\n");
2210 return qeth_l3_register_notifiers();
2211 }
2212
qeth_l3_exit(void)2213 static void __exit qeth_l3_exit(void)
2214 {
2215 qeth_l3_unregister_notifiers();
2216 pr_info("unregister layer 3 discipline\n");
2217 }
2218
2219 module_init(qeth_l3_init);
2220 module_exit(qeth_l3_exit);
2221 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2222 MODULE_DESCRIPTION("qeth layer 3 discipline");
2223 MODULE_LICENSE("GPL");
2224