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 if (addr->proto == QETH_PROT_IPV4)
108 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
109 else
110 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
111 if (rc)
112 break;
113 }
114 /* invert? */
115 if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
116 rc = !rc;
117 else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
118 rc = !rc;
119
120 return rc;
121 }
122
qeth_l3_delete_ip(struct qeth_card * card,struct qeth_ipaddr * tmp_addr)123 static int qeth_l3_delete_ip(struct qeth_card *card,
124 struct qeth_ipaddr *tmp_addr)
125 {
126 int rc = 0;
127 struct qeth_ipaddr *addr;
128
129 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
130 QETH_CARD_TEXT(card, 2, "delrxip");
131 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
132 QETH_CARD_TEXT(card, 2, "delvipa");
133 else
134 QETH_CARD_TEXT(card, 2, "delip");
135
136 if (tmp_addr->proto == QETH_PROT_IPV4)
137 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
138 else {
139 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
140 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
141 }
142
143 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
144 if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
145 return -ENOENT;
146
147 addr->ref_counter--;
148 if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
149 return rc;
150
151 if (qeth_card_hw_is_reachable(card))
152 rc = qeth_l3_deregister_addr_entry(card, addr);
153
154 hash_del(&addr->hnode);
155 kfree(addr);
156
157 return rc;
158 }
159
qeth_l3_add_ip(struct qeth_card * card,struct qeth_ipaddr * tmp_addr)160 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
161 {
162 int rc = 0;
163 struct qeth_ipaddr *addr;
164 char buf[40];
165
166 if (tmp_addr->type == QETH_IP_TYPE_RXIP)
167 QETH_CARD_TEXT(card, 2, "addrxip");
168 else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
169 QETH_CARD_TEXT(card, 2, "addvipa");
170 else
171 QETH_CARD_TEXT(card, 2, "addip");
172
173 if (tmp_addr->proto == QETH_PROT_IPV4)
174 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
175 else {
176 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
177 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
178 }
179
180 addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
181 if (addr) {
182 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
183 return -EADDRINUSE;
184 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
185 addr->ref_counter++;
186 return 0;
187 }
188 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
189 buf);
190 dev_warn(&card->gdev->dev,
191 "Registering IP address %s failed\n", buf);
192 return -EADDRINUSE;
193 } else {
194 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
195 if (!addr)
196 return -ENOMEM;
197
198 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
199 QETH_CARD_TEXT(card, 2, "tkovaddr");
200 addr->ipato = 1;
201 }
202 hash_add(card->ip_htable, &addr->hnode,
203 qeth_l3_ipaddr_hash(addr));
204
205 if (!qeth_card_hw_is_reachable(card)) {
206 addr->disp_flag = QETH_DISP_ADDR_ADD;
207 return 0;
208 }
209
210 rc = qeth_l3_register_addr_entry(card, addr);
211
212 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
213 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
214 } else {
215 hash_del(&addr->hnode);
216 kfree(addr);
217 }
218 }
219 return rc;
220 }
221
qeth_l3_modify_ip(struct qeth_card * card,struct qeth_ipaddr * addr,bool add)222 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
223 bool add)
224 {
225 int rc;
226
227 mutex_lock(&card->ip_lock);
228 rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
229 mutex_unlock(&card->ip_lock);
230
231 return rc;
232 }
233
qeth_l3_drain_rx_mode_cache(struct qeth_card * card)234 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
235 {
236 struct qeth_ipaddr *addr;
237 struct hlist_node *tmp;
238 int i;
239
240 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
241 hash_del(&addr->hnode);
242 kfree(addr);
243 }
244 }
245
qeth_l3_clear_ip_htable(struct qeth_card * card,int recover)246 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
247 {
248 struct qeth_ipaddr *addr;
249 struct hlist_node *tmp;
250 int i;
251
252 QETH_CARD_TEXT(card, 4, "clearip");
253
254 mutex_lock(&card->ip_lock);
255
256 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
257 if (!recover) {
258 hash_del(&addr->hnode);
259 kfree(addr);
260 continue;
261 }
262 addr->disp_flag = QETH_DISP_ADDR_ADD;
263 }
264
265 mutex_unlock(&card->ip_lock);
266 }
267
qeth_l3_recover_ip(struct qeth_card * card)268 static void qeth_l3_recover_ip(struct qeth_card *card)
269 {
270 struct qeth_ipaddr *addr;
271 struct hlist_node *tmp;
272 int i;
273 int rc;
274
275 QETH_CARD_TEXT(card, 4, "recovrip");
276
277 mutex_lock(&card->ip_lock);
278
279 hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
280 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
281 rc = qeth_l3_register_addr_entry(card, addr);
282
283 if (!rc) {
284 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
285 } else {
286 hash_del(&addr->hnode);
287 kfree(addr);
288 }
289 }
290 }
291
292 mutex_unlock(&card->ip_lock);
293 }
294
qeth_l3_setdelip_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)295 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
296 unsigned long data)
297 {
298 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
299
300 switch (cmd->hdr.return_code) {
301 case IPA_RC_SUCCESS:
302 return 0;
303 case IPA_RC_DUPLICATE_IP_ADDRESS:
304 return -EADDRINUSE;
305 case IPA_RC_MC_ADDR_NOT_FOUND:
306 return -ENOENT;
307 case IPA_RC_LAN_OFFLINE:
308 return -ENETDOWN;
309 default:
310 return -EIO;
311 }
312 }
313
qeth_l3_send_setdelmc(struct qeth_card * card,struct qeth_ipaddr * addr,enum qeth_ipa_cmds ipacmd)314 static int qeth_l3_send_setdelmc(struct qeth_card *card,
315 struct qeth_ipaddr *addr,
316 enum qeth_ipa_cmds ipacmd)
317 {
318 struct qeth_cmd_buffer *iob;
319 struct qeth_ipa_cmd *cmd;
320
321 QETH_CARD_TEXT(card, 4, "setdelmc");
322
323 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
324 IPA_DATA_SIZEOF(setdelipm));
325 if (!iob)
326 return -ENOMEM;
327 cmd = __ipa_cmd(iob);
328 if (addr->proto == QETH_PROT_IPV6) {
329 cmd->data.setdelipm.ip = addr->u.a6.addr;
330 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
331 } else {
332 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
333 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
334 }
335
336 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
337 }
338
qeth_l3_set_ipv6_prefix(struct in6_addr * prefix,unsigned int len)339 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
340 {
341 unsigned int i = 0;
342
343 while (len && i < 4) {
344 int mask_len = min_t(int, len, 32);
345
346 prefix->s6_addr32[i] = inet_make_mask(mask_len);
347 len -= mask_len;
348 i++;
349 }
350 }
351
qeth_l3_get_setdelip_flags(struct qeth_ipaddr * addr,bool set)352 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
353 {
354 switch (addr->type) {
355 case QETH_IP_TYPE_RXIP:
356 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
357 case QETH_IP_TYPE_VIPA:
358 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
359 QETH_IPA_DELIP_VIPA_FLAG;
360 default:
361 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
362 }
363 }
364
qeth_l3_send_setdelip(struct qeth_card * card,struct qeth_ipaddr * addr,enum qeth_ipa_cmds ipacmd)365 static int qeth_l3_send_setdelip(struct qeth_card *card,
366 struct qeth_ipaddr *addr,
367 enum qeth_ipa_cmds ipacmd)
368 {
369 struct qeth_cmd_buffer *iob;
370 struct qeth_ipa_cmd *cmd;
371 u32 flags;
372
373 QETH_CARD_TEXT(card, 4, "setdelip");
374
375 iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
376 IPA_DATA_SIZEOF(setdelip6));
377 if (!iob)
378 return -ENOMEM;
379 cmd = __ipa_cmd(iob);
380
381 flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
382 QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
383
384 if (addr->proto == QETH_PROT_IPV6) {
385 cmd->data.setdelip6.addr = addr->u.a6.addr;
386 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
387 addr->u.a6.pfxlen);
388 cmd->data.setdelip6.flags = flags;
389 } else {
390 cmd->data.setdelip4.addr = addr->u.a4.addr;
391 cmd->data.setdelip4.mask = addr->u.a4.mask;
392 cmd->data.setdelip4.flags = flags;
393 }
394
395 return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
396 }
397
qeth_l3_send_setrouting(struct qeth_card * card,enum qeth_routing_types type,enum qeth_prot_versions prot)398 static int qeth_l3_send_setrouting(struct qeth_card *card,
399 enum qeth_routing_types type, enum qeth_prot_versions prot)
400 {
401 int rc;
402 struct qeth_ipa_cmd *cmd;
403 struct qeth_cmd_buffer *iob;
404
405 QETH_CARD_TEXT(card, 4, "setroutg");
406 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
407 IPA_DATA_SIZEOF(setrtg));
408 if (!iob)
409 return -ENOMEM;
410 cmd = __ipa_cmd(iob);
411 cmd->data.setrtg.type = (type);
412 rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
413
414 return rc;
415 }
416
qeth_l3_correct_routing_type(struct qeth_card * card,enum qeth_routing_types * type,enum qeth_prot_versions prot)417 static int qeth_l3_correct_routing_type(struct qeth_card *card,
418 enum qeth_routing_types *type, enum qeth_prot_versions prot)
419 {
420 if (IS_IQD(card)) {
421 switch (*type) {
422 case NO_ROUTER:
423 case PRIMARY_CONNECTOR:
424 case SECONDARY_CONNECTOR:
425 case MULTICAST_ROUTER:
426 return 0;
427 default:
428 goto out_inval;
429 }
430 } else {
431 switch (*type) {
432 case NO_ROUTER:
433 case PRIMARY_ROUTER:
434 case SECONDARY_ROUTER:
435 return 0;
436 case MULTICAST_ROUTER:
437 if (qeth_is_ipafunc_supported(card, prot,
438 IPA_OSA_MC_ROUTER))
439 return 0;
440 default:
441 goto out_inval;
442 }
443 }
444 out_inval:
445 *type = NO_ROUTER;
446 return -EINVAL;
447 }
448
qeth_l3_setrouting_v4(struct qeth_card * card)449 int qeth_l3_setrouting_v4(struct qeth_card *card)
450 {
451 int rc;
452
453 QETH_CARD_TEXT(card, 3, "setrtg4");
454
455 rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
456 QETH_PROT_IPV4);
457 if (rc)
458 return rc;
459
460 rc = qeth_l3_send_setrouting(card, card->options.route4.type,
461 QETH_PROT_IPV4);
462 if (rc) {
463 card->options.route4.type = NO_ROUTER;
464 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
465 rc, CARD_DEVID(card));
466 }
467 return rc;
468 }
469
qeth_l3_setrouting_v6(struct qeth_card * card)470 int qeth_l3_setrouting_v6(struct qeth_card *card)
471 {
472 int rc = 0;
473
474 QETH_CARD_TEXT(card, 3, "setrtg6");
475
476 if (!qeth_is_supported(card, IPA_IPV6))
477 return 0;
478 rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
479 QETH_PROT_IPV6);
480 if (rc)
481 return rc;
482
483 rc = qeth_l3_send_setrouting(card, card->options.route6.type,
484 QETH_PROT_IPV6);
485 if (rc) {
486 card->options.route6.type = NO_ROUTER;
487 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
488 rc, CARD_DEVID(card));
489 }
490 return rc;
491 }
492
493 /*
494 * IP address takeover related functions
495 */
496
497 /**
498 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
499 *
500 * Caller must hold ip_lock.
501 */
qeth_l3_update_ipato(struct qeth_card * card)502 void qeth_l3_update_ipato(struct qeth_card *card)
503 {
504 struct qeth_ipaddr *addr;
505 unsigned int i;
506
507 hash_for_each(card->ip_htable, i, addr, hnode) {
508 if (addr->type != QETH_IP_TYPE_NORMAL)
509 continue;
510 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
511 }
512 }
513
qeth_l3_clear_ipato_list(struct qeth_card * card)514 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
515 {
516 struct qeth_ipato_entry *ipatoe, *tmp;
517
518 mutex_lock(&card->ip_lock);
519
520 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
521 list_del(&ipatoe->entry);
522 kfree(ipatoe);
523 }
524
525 qeth_l3_update_ipato(card);
526 mutex_unlock(&card->ip_lock);
527 }
528
qeth_l3_add_ipato_entry(struct qeth_card * card,struct qeth_ipato_entry * new)529 int qeth_l3_add_ipato_entry(struct qeth_card *card,
530 struct qeth_ipato_entry *new)
531 {
532 struct qeth_ipato_entry *ipatoe;
533 int rc = 0;
534
535 QETH_CARD_TEXT(card, 2, "addipato");
536
537 mutex_lock(&card->ip_lock);
538
539 list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
540 if (ipatoe->proto != new->proto)
541 continue;
542 if (!memcmp(ipatoe->addr, new->addr,
543 (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
544 (ipatoe->mask_bits == new->mask_bits)) {
545 rc = -EEXIST;
546 break;
547 }
548 }
549
550 if (!rc) {
551 list_add_tail(&new->entry, &card->ipato.entries);
552 qeth_l3_update_ipato(card);
553 }
554
555 mutex_unlock(&card->ip_lock);
556
557 return rc;
558 }
559
qeth_l3_del_ipato_entry(struct qeth_card * card,enum qeth_prot_versions proto,u8 * addr,unsigned int mask_bits)560 int qeth_l3_del_ipato_entry(struct qeth_card *card,
561 enum qeth_prot_versions proto, u8 *addr,
562 unsigned int mask_bits)
563 {
564 struct qeth_ipato_entry *ipatoe, *tmp;
565 int rc = -ENOENT;
566
567 QETH_CARD_TEXT(card, 2, "delipato");
568
569 mutex_lock(&card->ip_lock);
570
571 list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
572 if (ipatoe->proto != proto)
573 continue;
574 if (!memcmp(ipatoe->addr, addr,
575 (proto == QETH_PROT_IPV4) ? 4 : 16) &&
576 (ipatoe->mask_bits == mask_bits)) {
577 list_del(&ipatoe->entry);
578 qeth_l3_update_ipato(card);
579 kfree(ipatoe);
580 rc = 0;
581 }
582 }
583
584 mutex_unlock(&card->ip_lock);
585
586 return rc;
587 }
588
qeth_l3_modify_rxip_vipa(struct qeth_card * card,bool add,const u8 * ip,enum qeth_ip_types type,enum qeth_prot_versions proto)589 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
590 enum qeth_ip_types type,
591 enum qeth_prot_versions proto)
592 {
593 struct qeth_ipaddr addr;
594
595 qeth_l3_init_ipaddr(&addr, type, proto);
596 if (proto == QETH_PROT_IPV4)
597 memcpy(&addr.u.a4.addr, ip, 4);
598 else
599 memcpy(&addr.u.a6.addr, ip, 16);
600
601 return qeth_l3_modify_ip(card, &addr, add);
602 }
603
qeth_l3_modify_hsuid(struct qeth_card * card,bool add)604 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
605 {
606 struct qeth_ipaddr addr;
607 unsigned int i;
608
609 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
610 addr.u.a6.addr.s6_addr[0] = 0xfe;
611 addr.u.a6.addr.s6_addr[1] = 0x80;
612 for (i = 0; i < 8; i++)
613 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
614
615 return qeth_l3_modify_ip(card, &addr, add);
616 }
617
qeth_l3_register_addr_entry(struct qeth_card * card,struct qeth_ipaddr * addr)618 static int qeth_l3_register_addr_entry(struct qeth_card *card,
619 struct qeth_ipaddr *addr)
620 {
621 char buf[50];
622 int rc = 0;
623 int cnt = 3;
624
625 if (card->options.sniffer)
626 return 0;
627
628 if (addr->proto == QETH_PROT_IPV4) {
629 QETH_CARD_TEXT(card, 2, "setaddr4");
630 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
631 } else if (addr->proto == QETH_PROT_IPV6) {
632 QETH_CARD_TEXT(card, 2, "setaddr6");
633 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
634 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
635 } else {
636 QETH_CARD_TEXT(card, 2, "setaddr?");
637 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
638 }
639 do {
640 if (addr->is_multicast)
641 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
642 else
643 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
644 if (rc)
645 QETH_CARD_TEXT(card, 2, "failed");
646 } while ((--cnt > 0) && rc);
647 if (rc) {
648 QETH_CARD_TEXT(card, 2, "FAILED");
649 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
650 dev_warn(&card->gdev->dev,
651 "Registering IP address %s failed\n", buf);
652 }
653 return rc;
654 }
655
qeth_l3_deregister_addr_entry(struct qeth_card * card,struct qeth_ipaddr * addr)656 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
657 struct qeth_ipaddr *addr)
658 {
659 int rc = 0;
660
661 if (card->options.sniffer)
662 return 0;
663
664 if (addr->proto == QETH_PROT_IPV4) {
665 QETH_CARD_TEXT(card, 2, "deladdr4");
666 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
667 } else if (addr->proto == QETH_PROT_IPV6) {
668 QETH_CARD_TEXT(card, 2, "deladdr6");
669 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
670 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
671 } else {
672 QETH_CARD_TEXT(card, 2, "deladdr?");
673 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
674 }
675 if (addr->is_multicast)
676 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
677 else
678 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
679 if (rc)
680 QETH_CARD_TEXT(card, 2, "failed");
681
682 return rc;
683 }
684
qeth_l3_setadapter_parms(struct qeth_card * card)685 static int qeth_l3_setadapter_parms(struct qeth_card *card)
686 {
687 int rc = 0;
688
689 QETH_CARD_TEXT(card, 2, "setadprm");
690
691 if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
692 rc = qeth_setadpparms_change_macaddr(card);
693 if (rc)
694 dev_warn(&card->gdev->dev, "Reading the adapter MAC"
695 " address failed\n");
696 }
697
698 return rc;
699 }
700
qeth_l3_start_ipa_arp_processing(struct qeth_card * card)701 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
702 {
703 int rc;
704
705 QETH_CARD_TEXT(card, 3, "ipaarp");
706
707 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
708 dev_info(&card->gdev->dev,
709 "ARP processing not supported on %s!\n",
710 netdev_name(card->dev));
711 return 0;
712 }
713 rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
714 IPA_CMD_ASS_START, NULL);
715 if (rc) {
716 dev_warn(&card->gdev->dev,
717 "Starting ARP processing support for %s failed\n",
718 netdev_name(card->dev));
719 }
720 return rc;
721 }
722
qeth_l3_start_ipa_source_mac(struct qeth_card * card)723 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
724 {
725 int rc;
726
727 QETH_CARD_TEXT(card, 3, "stsrcmac");
728
729 if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
730 dev_info(&card->gdev->dev,
731 "Inbound source MAC-address not supported on %s\n",
732 netdev_name(card->dev));
733 return -EOPNOTSUPP;
734 }
735
736 rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
737 IPA_CMD_ASS_START, NULL);
738 if (rc)
739 dev_warn(&card->gdev->dev,
740 "Starting source MAC-address support for %s failed\n",
741 netdev_name(card->dev));
742 return rc;
743 }
744
qeth_l3_start_ipa_vlan(struct qeth_card * card)745 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
746 {
747 int rc = 0;
748
749 QETH_CARD_TEXT(card, 3, "strtvlan");
750
751 if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
752 dev_info(&card->gdev->dev,
753 "VLAN not supported on %s\n", netdev_name(card->dev));
754 return -EOPNOTSUPP;
755 }
756
757 rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
758 IPA_CMD_ASS_START, NULL);
759 if (rc) {
760 dev_warn(&card->gdev->dev,
761 "Starting VLAN support for %s failed\n",
762 netdev_name(card->dev));
763 } else {
764 dev_info(&card->gdev->dev, "VLAN enabled\n");
765 }
766 return rc;
767 }
768
qeth_l3_start_ipa_multicast(struct qeth_card * card)769 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
770 {
771 int rc;
772
773 QETH_CARD_TEXT(card, 3, "stmcast");
774
775 if (!qeth_is_supported(card, IPA_MULTICASTING)) {
776 dev_info(&card->gdev->dev,
777 "Multicast not supported on %s\n",
778 netdev_name(card->dev));
779 return -EOPNOTSUPP;
780 }
781
782 rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
783 IPA_CMD_ASS_START, NULL);
784 if (rc) {
785 dev_warn(&card->gdev->dev,
786 "Starting multicast support for %s failed\n",
787 netdev_name(card->dev));
788 } else {
789 dev_info(&card->gdev->dev, "Multicast enabled\n");
790 card->dev->flags |= IFF_MULTICAST;
791 }
792 return rc;
793 }
794
qeth_l3_softsetup_ipv6(struct qeth_card * card)795 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
796 {
797 u32 ipv6_data = 3;
798 int rc;
799
800 QETH_CARD_TEXT(card, 3, "softipv6");
801
802 if (IS_IQD(card))
803 goto out;
804
805 rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
806 &ipv6_data);
807 if (rc) {
808 dev_err(&card->gdev->dev,
809 "Activating IPv6 support for %s failed\n",
810 netdev_name(card->dev));
811 return rc;
812 }
813 rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
814 NULL);
815 if (rc) {
816 dev_err(&card->gdev->dev,
817 "Activating IPv6 support for %s failed\n",
818 netdev_name(card->dev));
819 return rc;
820 }
821 rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
822 IPA_CMD_ASS_START, NULL);
823 if (rc) {
824 dev_warn(&card->gdev->dev,
825 "Enabling the passthrough mode for %s failed\n",
826 netdev_name(card->dev));
827 return rc;
828 }
829 out:
830 dev_info(&card->gdev->dev, "IPV6 enabled\n");
831 return 0;
832 }
833
qeth_l3_start_ipa_ipv6(struct qeth_card * card)834 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
835 {
836 QETH_CARD_TEXT(card, 3, "strtipv6");
837
838 if (!qeth_is_supported(card, IPA_IPV6)) {
839 dev_info(&card->gdev->dev,
840 "IPv6 not supported on %s\n", netdev_name(card->dev));
841 return 0;
842 }
843 return qeth_l3_softsetup_ipv6(card);
844 }
845
qeth_l3_start_ipa_broadcast(struct qeth_card * card)846 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
847 {
848 u32 filter_data = 1;
849 int rc;
850
851 QETH_CARD_TEXT(card, 3, "stbrdcst");
852 card->info.broadcast_capable = 0;
853 if (!qeth_is_supported(card, IPA_FILTERING)) {
854 dev_info(&card->gdev->dev,
855 "Broadcast not supported on %s\n",
856 netdev_name(card->dev));
857 rc = -EOPNOTSUPP;
858 goto out;
859 }
860 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
861 IPA_CMD_ASS_START, NULL);
862 if (rc) {
863 dev_warn(&card->gdev->dev,
864 "Enabling broadcast filtering for %s failed\n",
865 netdev_name(card->dev));
866 goto out;
867 }
868
869 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
870 IPA_CMD_ASS_CONFIGURE, &filter_data);
871 if (rc) {
872 dev_warn(&card->gdev->dev,
873 "Setting up broadcast filtering for %s failed\n",
874 netdev_name(card->dev));
875 goto out;
876 }
877 card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
878 dev_info(&card->gdev->dev, "Broadcast enabled\n");
879 rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
880 IPA_CMD_ASS_ENABLE, &filter_data);
881 if (rc) {
882 dev_warn(&card->gdev->dev,
883 "Setting up broadcast echo filtering for %s failed\n",
884 netdev_name(card->dev));
885 goto out;
886 }
887 card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
888 out:
889 if (card->info.broadcast_capable)
890 card->dev->flags |= IFF_BROADCAST;
891 else
892 card->dev->flags &= ~IFF_BROADCAST;
893 return rc;
894 }
895
qeth_l3_start_ipassists(struct qeth_card * card)896 static void qeth_l3_start_ipassists(struct qeth_card *card)
897 {
898 QETH_CARD_TEXT(card, 3, "strtipas");
899
900 qeth_l3_start_ipa_arp_processing(card); /* go on*/
901 qeth_l3_start_ipa_source_mac(card); /* go on*/
902 qeth_l3_start_ipa_vlan(card); /* go on*/
903 qeth_l3_start_ipa_multicast(card); /* go on*/
904 qeth_l3_start_ipa_ipv6(card); /* go on*/
905 qeth_l3_start_ipa_broadcast(card); /* go on*/
906 }
907
qeth_l3_iqd_read_initial_mac_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)908 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
909 struct qeth_reply *reply, unsigned long data)
910 {
911 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
912
913 if (cmd->hdr.return_code)
914 return -EIO;
915 if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
916 return -EADDRNOTAVAIL;
917
918 ether_addr_copy(card->dev->dev_addr,
919 cmd->data.create_destroy_addr.mac_addr);
920 return 0;
921 }
922
qeth_l3_iqd_read_initial_mac(struct qeth_card * card)923 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
924 {
925 int rc = 0;
926 struct qeth_cmd_buffer *iob;
927
928 QETH_CARD_TEXT(card, 2, "hsrmac");
929
930 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
931 IPA_DATA_SIZEOF(create_destroy_addr));
932 if (!iob)
933 return -ENOMEM;
934
935 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
936 NULL);
937 return rc;
938 }
939
qeth_l3_get_unique_id_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)940 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
941 struct qeth_reply *reply, unsigned long data)
942 {
943 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
944 u16 *uid = reply->param;
945
946 if (cmd->hdr.return_code == 0) {
947 *uid = cmd->data.create_destroy_addr.uid;
948 return 0;
949 }
950
951 dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
952 return -EIO;
953 }
954
qeth_l3_get_unique_id(struct qeth_card * card,u16 uid)955 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
956 {
957 struct qeth_cmd_buffer *iob;
958
959 QETH_CARD_TEXT(card, 2, "guniqeid");
960
961 if (!qeth_is_supported(card, IPA_IPV6))
962 goto out;
963
964 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
965 IPA_DATA_SIZEOF(create_destroy_addr));
966 if (!iob)
967 goto out;
968
969 __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
970 qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
971
972 out:
973 return uid;
974 }
975
976 static int
qeth_diags_trace_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)977 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
978 unsigned long data)
979 {
980 struct qeth_ipa_cmd *cmd;
981 __u16 rc;
982
983 QETH_CARD_TEXT(card, 2, "diastrcb");
984
985 cmd = (struct qeth_ipa_cmd *)data;
986 rc = cmd->hdr.return_code;
987 if (rc)
988 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
989 switch (cmd->data.diagass.action) {
990 case QETH_DIAGS_CMD_TRACE_QUERY:
991 break;
992 case QETH_DIAGS_CMD_TRACE_DISABLE:
993 switch (rc) {
994 case 0:
995 case IPA_RC_INVALID_SUBCMD:
996 card->info.promisc_mode = SET_PROMISC_MODE_OFF;
997 dev_info(&card->gdev->dev, "The HiperSockets network "
998 "traffic analyzer is deactivated\n");
999 break;
1000 default:
1001 break;
1002 }
1003 break;
1004 case QETH_DIAGS_CMD_TRACE_ENABLE:
1005 switch (rc) {
1006 case 0:
1007 card->info.promisc_mode = SET_PROMISC_MODE_ON;
1008 dev_info(&card->gdev->dev, "The HiperSockets network "
1009 "traffic analyzer is activated\n");
1010 break;
1011 case IPA_RC_HARDWARE_AUTH_ERROR:
1012 dev_warn(&card->gdev->dev, "The device is not "
1013 "authorized to run as a HiperSockets network "
1014 "traffic analyzer\n");
1015 break;
1016 case IPA_RC_TRACE_ALREADY_ACTIVE:
1017 dev_warn(&card->gdev->dev, "A HiperSockets "
1018 "network traffic analyzer is already "
1019 "active in the HiperSockets LAN\n");
1020 break;
1021 default:
1022 break;
1023 }
1024 break;
1025 default:
1026 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1027 cmd->data.diagass.action, CARD_DEVID(card));
1028 }
1029
1030 return rc ? -EIO : 0;
1031 }
1032
1033 static int
qeth_diags_trace(struct qeth_card * card,enum qeth_diags_trace_cmds diags_cmd)1034 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1035 {
1036 struct qeth_cmd_buffer *iob;
1037 struct qeth_ipa_cmd *cmd;
1038
1039 QETH_CARD_TEXT(card, 2, "diagtrac");
1040
1041 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1042 if (!iob)
1043 return -ENOMEM;
1044 cmd = __ipa_cmd(iob);
1045 cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1046 cmd->data.diagass.action = diags_cmd;
1047 return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1048 }
1049
qeth_l3_add_mcast_rtnl(struct net_device * dev,int vid,void * arg)1050 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1051 {
1052 struct qeth_card *card = arg;
1053 struct inet6_dev *in6_dev;
1054 struct in_device *in4_dev;
1055 struct qeth_ipaddr *ipm;
1056 struct qeth_ipaddr tmp;
1057 struct ip_mc_list *im4;
1058 struct ifmcaddr6 *im6;
1059
1060 QETH_CARD_TEXT(card, 4, "addmc");
1061
1062 if (!dev || !(dev->flags & IFF_UP))
1063 goto out;
1064
1065 in4_dev = __in_dev_get_rtnl(dev);
1066 if (!in4_dev)
1067 goto walk_ipv6;
1068
1069 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1070 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1071 tmp.is_multicast = 1;
1072
1073 for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1074 im4 = rtnl_dereference(im4->next_rcu)) {
1075 tmp.u.a4.addr = im4->multiaddr;
1076
1077 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1078 if (ipm) {
1079 /* for mcast, by-IP match means full match */
1080 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1081 continue;
1082 }
1083
1084 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1085 if (!ipm)
1086 continue;
1087
1088 hash_add(card->rx_mode_addrs, &ipm->hnode,
1089 qeth_l3_ipaddr_hash(ipm));
1090 }
1091
1092 walk_ipv6:
1093 if (!qeth_is_supported(card, IPA_IPV6))
1094 goto out;
1095
1096 in6_dev = __in6_dev_get(dev);
1097 if (!in6_dev)
1098 goto out;
1099
1100 qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1101 tmp.disp_flag = QETH_DISP_ADDR_ADD;
1102 tmp.is_multicast = 1;
1103
1104 read_lock_bh(&in6_dev->lock);
1105 for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1106 tmp.u.a6.addr = im6->mca_addr;
1107
1108 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1109 if (ipm) {
1110 /* for mcast, by-IP match means full match */
1111 ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1112 continue;
1113 }
1114
1115 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1116 if (!ipm)
1117 continue;
1118
1119 hash_add(card->rx_mode_addrs, &ipm->hnode,
1120 qeth_l3_ipaddr_hash(ipm));
1121
1122 }
1123 read_unlock_bh(&in6_dev->lock);
1124
1125 out:
1126 return 0;
1127 }
1128
qeth_l3_vlan_rx_add_vid(struct net_device * dev,__be16 proto,u16 vid)1129 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1130 __be16 proto, u16 vid)
1131 {
1132 struct qeth_card *card = dev->ml_priv;
1133
1134 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1135 return 0;
1136 }
1137
qeth_l3_vlan_rx_kill_vid(struct net_device * dev,__be16 proto,u16 vid)1138 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1139 __be16 proto, u16 vid)
1140 {
1141 struct qeth_card *card = dev->ml_priv;
1142
1143 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1144 return 0;
1145 }
1146
qeth_l3_set_promisc_mode(struct qeth_card * card)1147 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1148 {
1149 bool enable = card->dev->flags & IFF_PROMISC;
1150
1151 if (card->info.promisc_mode == enable)
1152 return;
1153
1154 if (IS_VM_NIC(card)) { /* Guestlan trace */
1155 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1156 qeth_setadp_promisc_mode(card, enable);
1157 } else if (card->options.sniffer && /* HiperSockets trace */
1158 qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1159 if (enable) {
1160 QETH_CARD_TEXT(card, 3, "+promisc");
1161 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1162 } else {
1163 QETH_CARD_TEXT(card, 3, "-promisc");
1164 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1165 }
1166 }
1167 }
1168
qeth_l3_rx_mode_work(struct work_struct * work)1169 static void qeth_l3_rx_mode_work(struct work_struct *work)
1170 {
1171 struct qeth_card *card = container_of(work, struct qeth_card,
1172 rx_mode_work);
1173 struct qeth_ipaddr *addr;
1174 struct hlist_node *tmp;
1175 int i, rc;
1176
1177 QETH_CARD_TEXT(card, 3, "setmulti");
1178
1179 if (!card->options.sniffer) {
1180 rtnl_lock();
1181 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1182 if (qeth_is_supported(card, IPA_FULL_VLAN))
1183 vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1184 rtnl_unlock();
1185
1186 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1187 switch (addr->disp_flag) {
1188 case QETH_DISP_ADDR_DELETE:
1189 rc = qeth_l3_deregister_addr_entry(card, addr);
1190 if (!rc || rc == -ENOENT) {
1191 hash_del(&addr->hnode);
1192 kfree(addr);
1193 }
1194 break;
1195 case QETH_DISP_ADDR_ADD:
1196 rc = qeth_l3_register_addr_entry(card, addr);
1197 if (rc && rc != -ENETDOWN) {
1198 hash_del(&addr->hnode);
1199 kfree(addr);
1200 break;
1201 }
1202 fallthrough;
1203 default:
1204 /* for next call to set_rx_mode(): */
1205 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1206 }
1207 }
1208 }
1209
1210 qeth_l3_set_promisc_mode(card);
1211 }
1212
qeth_l3_arp_makerc(u16 rc)1213 static int qeth_l3_arp_makerc(u16 rc)
1214 {
1215 switch (rc) {
1216 case IPA_RC_SUCCESS:
1217 return 0;
1218 case QETH_IPA_ARP_RC_NOTSUPP:
1219 case QETH_IPA_ARP_RC_Q_NOTSUPP:
1220 return -EOPNOTSUPP;
1221 case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1222 return -EINVAL;
1223 case QETH_IPA_ARP_RC_Q_NO_DATA:
1224 return -ENOENT;
1225 default:
1226 return -EIO;
1227 }
1228 }
1229
qeth_l3_arp_cmd_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1230 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1231 unsigned long data)
1232 {
1233 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1234
1235 qeth_setassparms_cb(card, reply, data);
1236 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1237 }
1238
qeth_l3_arp_set_no_entries(struct qeth_card * card,int no_entries)1239 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1240 {
1241 struct qeth_cmd_buffer *iob;
1242 int rc;
1243
1244 QETH_CARD_TEXT(card, 3, "arpstnoe");
1245
1246 /*
1247 * currently GuestLAN only supports the ARP assist function
1248 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1249 * thus we say EOPNOTSUPP for this ARP function
1250 */
1251 if (IS_VM_NIC(card))
1252 return -EOPNOTSUPP;
1253 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1254 return -EOPNOTSUPP;
1255 }
1256
1257 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1258 IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1259 SETASS_DATA_SIZEOF(flags_32bit),
1260 QETH_PROT_IPV4);
1261 if (!iob)
1262 return -ENOMEM;
1263
1264 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1265 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1266 if (rc)
1267 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1268 CARD_DEVID(card), rc);
1269 return rc;
1270 }
1271
get_arp_entry_size(struct qeth_card * card,struct qeth_arp_query_data * qdata,struct qeth_arp_entrytype * type,__u8 strip_entries)1272 static __u32 get_arp_entry_size(struct qeth_card *card,
1273 struct qeth_arp_query_data *qdata,
1274 struct qeth_arp_entrytype *type, __u8 strip_entries)
1275 {
1276 __u32 rc;
1277 __u8 is_hsi;
1278
1279 is_hsi = qdata->reply_bits == 5;
1280 if (type->ip == QETHARP_IP_ADDR_V4) {
1281 QETH_CARD_TEXT(card, 4, "arpev4");
1282 if (strip_entries) {
1283 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1284 sizeof(struct qeth_arp_qi_entry7_short);
1285 } else {
1286 rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1287 sizeof(struct qeth_arp_qi_entry7);
1288 }
1289 } else if (type->ip == QETHARP_IP_ADDR_V6) {
1290 QETH_CARD_TEXT(card, 4, "arpev6");
1291 if (strip_entries) {
1292 rc = is_hsi ?
1293 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1294 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1295 } else {
1296 rc = is_hsi ?
1297 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1298 sizeof(struct qeth_arp_qi_entry7_ipv6);
1299 }
1300 } else {
1301 QETH_CARD_TEXT(card, 4, "arpinv");
1302 rc = 0;
1303 }
1304
1305 return rc;
1306 }
1307
arpentry_matches_prot(struct qeth_arp_entrytype * type,__u16 prot)1308 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1309 {
1310 return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1311 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1312 }
1313
qeth_l3_arp_query_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1314 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1315 struct qeth_reply *reply, unsigned long data)
1316 {
1317 struct qeth_ipa_cmd *cmd;
1318 struct qeth_arp_query_data *qdata;
1319 struct qeth_arp_query_info *qinfo;
1320 int e;
1321 int entrybytes_done;
1322 int stripped_bytes;
1323 __u8 do_strip_entries;
1324
1325 QETH_CARD_TEXT(card, 3, "arpquecb");
1326
1327 qinfo = (struct qeth_arp_query_info *) reply->param;
1328 cmd = (struct qeth_ipa_cmd *) data;
1329 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1330 if (cmd->hdr.return_code) {
1331 QETH_CARD_TEXT(card, 4, "arpcberr");
1332 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1333 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1334 }
1335 if (cmd->data.setassparms.hdr.return_code) {
1336 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1337 QETH_CARD_TEXT(card, 4, "setaperr");
1338 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1339 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1340 }
1341 qdata = &cmd->data.setassparms.data.query_arp;
1342 QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1343
1344 do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1345 stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1346 entrybytes_done = 0;
1347 for (e = 0; e < qdata->no_entries; ++e) {
1348 char *cur_entry;
1349 __u32 esize;
1350 struct qeth_arp_entrytype *etype;
1351
1352 cur_entry = &qdata->data + entrybytes_done;
1353 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1354 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1355 QETH_CARD_TEXT(card, 4, "pmis");
1356 QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1357 break;
1358 }
1359 esize = get_arp_entry_size(card, qdata, etype,
1360 do_strip_entries);
1361 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1362 if (!esize)
1363 break;
1364
1365 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1366 QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1367 memset(qinfo->udata, 0, 4);
1368 return -ENOSPC;
1369 }
1370
1371 memcpy(qinfo->udata + qinfo->udata_offset,
1372 &qdata->data + entrybytes_done + stripped_bytes,
1373 esize);
1374 entrybytes_done += esize + stripped_bytes;
1375 qinfo->udata_offset += esize;
1376 ++qinfo->no_entries;
1377 }
1378 /* check if all replies received ... */
1379 if (cmd->data.setassparms.hdr.seq_no <
1380 cmd->data.setassparms.hdr.number_of_replies)
1381 return 1;
1382 QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1383 memcpy(qinfo->udata, &qinfo->no_entries, 4);
1384 /* keep STRIP_ENTRIES flag so the user program can distinguish
1385 * stripped entries from normal ones */
1386 if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1387 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1388 memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1389 QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1390 return 0;
1391 }
1392
qeth_l3_query_arp_cache_info(struct qeth_card * card,enum qeth_prot_versions prot,struct qeth_arp_query_info * qinfo)1393 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1394 enum qeth_prot_versions prot,
1395 struct qeth_arp_query_info *qinfo)
1396 {
1397 struct qeth_cmd_buffer *iob;
1398 struct qeth_ipa_cmd *cmd;
1399 int rc;
1400
1401 QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1402
1403 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1404 IPA_CMD_ASS_ARP_QUERY_INFO,
1405 SETASS_DATA_SIZEOF(query_arp), prot);
1406 if (!iob)
1407 return -ENOMEM;
1408 cmd = __ipa_cmd(iob);
1409 cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1410 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1411 if (rc)
1412 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1413 CARD_DEVID(card), rc);
1414 return rc;
1415 }
1416
qeth_l3_arp_query(struct qeth_card * card,char __user * udata)1417 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1418 {
1419 struct qeth_arp_query_info qinfo = {0, };
1420 int rc;
1421
1422 QETH_CARD_TEXT(card, 3, "arpquery");
1423
1424 if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1425 IPA_ARP_PROCESSING)) {
1426 QETH_CARD_TEXT(card, 3, "arpqnsup");
1427 rc = -EOPNOTSUPP;
1428 goto out;
1429 }
1430 /* get size of userspace buffer and mask_bits -> 6 bytes */
1431 if (copy_from_user(&qinfo, udata, 6)) {
1432 rc = -EFAULT;
1433 goto out;
1434 }
1435 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1436 if (!qinfo.udata) {
1437 rc = -ENOMEM;
1438 goto out;
1439 }
1440 qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1441 rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1442 if (rc) {
1443 if (copy_to_user(udata, qinfo.udata, 4))
1444 rc = -EFAULT;
1445 goto free_and_out;
1446 }
1447 if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1448 /* fails in case of GuestLAN QDIO mode */
1449 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1450 }
1451 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1452 QETH_CARD_TEXT(card, 4, "qactf");
1453 rc = -EFAULT;
1454 goto free_and_out;
1455 }
1456 QETH_CARD_TEXT(card, 4, "qacts");
1457
1458 free_and_out:
1459 kfree(qinfo.udata);
1460 out:
1461 return rc;
1462 }
1463
qeth_l3_arp_modify_entry(struct qeth_card * card,struct qeth_arp_cache_entry * entry,enum qeth_arp_process_subcmds arp_cmd)1464 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1465 struct qeth_arp_cache_entry *entry,
1466 enum qeth_arp_process_subcmds arp_cmd)
1467 {
1468 struct qeth_arp_cache_entry *cmd_entry;
1469 struct qeth_cmd_buffer *iob;
1470 int rc;
1471
1472 if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1473 QETH_CARD_TEXT(card, 3, "arpadd");
1474 else
1475 QETH_CARD_TEXT(card, 3, "arpdel");
1476
1477 /*
1478 * currently GuestLAN only supports the ARP assist function
1479 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1480 * thus we say EOPNOTSUPP for this ARP function
1481 */
1482 if (IS_VM_NIC(card))
1483 return -EOPNOTSUPP;
1484 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1485 return -EOPNOTSUPP;
1486 }
1487
1488 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1489 SETASS_DATA_SIZEOF(arp_entry),
1490 QETH_PROT_IPV4);
1491 if (!iob)
1492 return -ENOMEM;
1493
1494 cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1495 ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1496 memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1497 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1498 if (rc)
1499 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1500 arp_cmd, CARD_DEVID(card), rc);
1501 return rc;
1502 }
1503
qeth_l3_arp_flush_cache(struct qeth_card * card)1504 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1505 {
1506 struct qeth_cmd_buffer *iob;
1507 int rc;
1508
1509 QETH_CARD_TEXT(card, 3, "arpflush");
1510
1511 /*
1512 * currently GuestLAN only supports the ARP assist function
1513 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1514 * thus we say EOPNOTSUPP for this ARP function
1515 */
1516 if (IS_VM_NIC(card) || IS_IQD(card))
1517 return -EOPNOTSUPP;
1518 if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1519 return -EOPNOTSUPP;
1520 }
1521
1522 iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1523 IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1524 QETH_PROT_IPV4);
1525 if (!iob)
1526 return -ENOMEM;
1527
1528 rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1529 if (rc)
1530 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1531 CARD_DEVID(card), rc);
1532 return rc;
1533 }
1534
qeth_l3_do_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)1535 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1536 {
1537 struct qeth_card *card = dev->ml_priv;
1538 struct qeth_arp_cache_entry arp_entry;
1539 enum qeth_arp_process_subcmds arp_cmd;
1540 int rc = 0;
1541
1542 switch (cmd) {
1543 case SIOC_QETH_ARP_SET_NO_ENTRIES:
1544 if (!capable(CAP_NET_ADMIN)) {
1545 rc = -EPERM;
1546 break;
1547 }
1548 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1549 break;
1550 case SIOC_QETH_ARP_QUERY_INFO:
1551 if (!capable(CAP_NET_ADMIN)) {
1552 rc = -EPERM;
1553 break;
1554 }
1555 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1556 break;
1557 case SIOC_QETH_ARP_ADD_ENTRY:
1558 case SIOC_QETH_ARP_REMOVE_ENTRY:
1559 if (!capable(CAP_NET_ADMIN))
1560 return -EPERM;
1561 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1562 return -EFAULT;
1563
1564 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1565 IPA_CMD_ASS_ARP_ADD_ENTRY :
1566 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1567 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1568 case SIOC_QETH_ARP_FLUSH_CACHE:
1569 if (!capable(CAP_NET_ADMIN)) {
1570 rc = -EPERM;
1571 break;
1572 }
1573 rc = qeth_l3_arp_flush_cache(card);
1574 break;
1575 default:
1576 rc = -EOPNOTSUPP;
1577 }
1578 return rc;
1579 }
1580
qeth_l3_get_cast_type_rcu(struct sk_buff * skb,struct dst_entry * dst,int ipv)1581 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1582 int ipv)
1583 {
1584 struct neighbour *n = NULL;
1585
1586 if (dst)
1587 n = dst_neigh_lookup_skb(dst, skb);
1588
1589 if (n) {
1590 int cast_type = n->type;
1591
1592 neigh_release(n);
1593 if ((cast_type == RTN_BROADCAST) ||
1594 (cast_type == RTN_MULTICAST) ||
1595 (cast_type == RTN_ANYCAST))
1596 return cast_type;
1597 return RTN_UNICAST;
1598 }
1599
1600 /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1601 switch (ipv) {
1602 case 4:
1603 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1604 return RTN_BROADCAST;
1605 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1606 RTN_MULTICAST : RTN_UNICAST;
1607 case 6:
1608 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1609 RTN_MULTICAST : RTN_UNICAST;
1610 default:
1611 /* ... and MAC address */
1612 return qeth_get_ether_cast_type(skb);
1613 }
1614 }
1615
qeth_l3_get_cast_type(struct sk_buff * skb)1616 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1617 {
1618 int ipv = qeth_get_ip_version(skb);
1619 struct dst_entry *dst;
1620 int cast_type;
1621
1622 rcu_read_lock();
1623 dst = qeth_dst_check_rcu(skb, ipv);
1624 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1625 rcu_read_unlock();
1626
1627 return cast_type;
1628 }
1629
qeth_l3_cast_type_to_flag(int cast_type)1630 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1631 {
1632 if (cast_type == RTN_MULTICAST)
1633 return QETH_CAST_MULTICAST;
1634 if (cast_type == RTN_ANYCAST)
1635 return QETH_CAST_ANYCAST;
1636 if (cast_type == RTN_BROADCAST)
1637 return QETH_CAST_BROADCAST;
1638 return QETH_CAST_UNICAST;
1639 }
1640
qeth_l3_fill_header(struct qeth_qdio_out_q * queue,struct qeth_hdr * hdr,struct sk_buff * skb,int ipv,unsigned int data_len)1641 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1642 struct qeth_hdr *hdr, struct sk_buff *skb,
1643 int ipv, unsigned int data_len)
1644 {
1645 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1646 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1647 struct qeth_card *card = queue->card;
1648 struct dst_entry *dst;
1649 int cast_type;
1650
1651 hdr->hdr.l3.length = data_len;
1652
1653 if (skb_is_gso(skb)) {
1654 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1655 } else {
1656 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1657
1658 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1659 l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1660 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1661 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1662 iucv_trans_hdr(skb)->destUserID, 8);
1663 return;
1664 }
1665
1666 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1667 qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1668 /* some HW requires combined L3+L4 csum offload: */
1669 if (ipv == 4)
1670 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1671 }
1672 }
1673
1674 if (ipv == 4 || IS_IQD(card)) {
1675 /* NETIF_F_HW_VLAN_CTAG_TX */
1676 if (skb_vlan_tag_present(skb)) {
1677 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1678 hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1679 }
1680 } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1681 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1682 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1683 }
1684
1685 rcu_read_lock();
1686 dst = qeth_dst_check_rcu(skb, ipv);
1687
1688 if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1689 cast_type = RTN_UNICAST;
1690 else
1691 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1692 l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1693
1694 if (ipv == 4) {
1695 l3_hdr->next_hop.addr.s6_addr32[3] =
1696 qeth_next_hop_v4_rcu(skb, dst);
1697 } else if (ipv == 6) {
1698 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1699
1700 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1701 if (!IS_IQD(card))
1702 hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1703 } else {
1704 /* OSA only: */
1705 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1706 }
1707 rcu_read_unlock();
1708 }
1709
qeth_l3_fixup_headers(struct sk_buff * skb)1710 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1711 {
1712 struct iphdr *iph = ip_hdr(skb);
1713
1714 /* this is safe, IPv6 traffic takes a different path */
1715 if (skb->ip_summed == CHECKSUM_PARTIAL)
1716 iph->check = 0;
1717 if (skb_is_gso(skb)) {
1718 iph->tot_len = 0;
1719 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1720 iph->daddr, 0);
1721 }
1722 }
1723
qeth_l3_xmit(struct qeth_card * card,struct sk_buff * skb,struct qeth_qdio_out_q * queue,int ipv)1724 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1725 struct qeth_qdio_out_q *queue, int ipv)
1726 {
1727 unsigned int hw_hdr_len;
1728 int rc;
1729
1730 /* re-use the L2 header area for the HW header: */
1731 hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1732 sizeof(struct qeth_hdr);
1733 rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1734 if (rc)
1735 return rc;
1736 skb_pull(skb, ETH_HLEN);
1737
1738 qeth_l3_fixup_headers(skb);
1739 return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1740 }
1741
qeth_l3_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)1742 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1743 struct net_device *dev)
1744 {
1745 struct qeth_card *card = dev->ml_priv;
1746 u16 txq = skb_get_queue_mapping(skb);
1747 int ipv = qeth_get_ip_version(skb);
1748 struct qeth_qdio_out_q *queue;
1749 int rc;
1750
1751 if (!skb_is_gso(skb))
1752 qdisc_skb_cb(skb)->pkt_len = skb->len;
1753 if (IS_IQD(card)) {
1754 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1755
1756 if (card->options.sniffer)
1757 goto tx_drop;
1758 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1759 (card->options.cq == QETH_CQ_ENABLED &&
1760 skb->protocol != htons(ETH_P_AF_IUCV)))
1761 goto tx_drop;
1762 } else {
1763 queue = card->qdio.out_qs[txq];
1764 }
1765
1766 if (!(dev->flags & IFF_BROADCAST) &&
1767 qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1768 goto tx_drop;
1769
1770 if (ipv == 4 || IS_IQD(card))
1771 rc = qeth_l3_xmit(card, skb, queue, ipv);
1772 else
1773 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1774
1775 if (!rc)
1776 return NETDEV_TX_OK;
1777
1778 tx_drop:
1779 QETH_TXQ_STAT_INC(queue, tx_dropped);
1780 kfree_skb(skb);
1781 return NETDEV_TX_OK;
1782 }
1783
qeth_l3_set_rx_mode(struct net_device * dev)1784 static void qeth_l3_set_rx_mode(struct net_device *dev)
1785 {
1786 struct qeth_card *card = dev->ml_priv;
1787
1788 schedule_work(&card->rx_mode_work);
1789 }
1790
1791 /*
1792 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1793 * NOARP on the netdevice is no option because it also turns off neighbor
1794 * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1795 * arp resolution but we want the hard header (packet socket will work
1796 * e.g. tcpdump)
1797 */
qeth_l3_neigh_setup_noarp(struct neighbour * n)1798 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1799 {
1800 n->nud_state = NUD_NOARP;
1801 memcpy(n->ha, "FAKELL", 6);
1802 n->output = n->ops->connected_output;
1803 return 0;
1804 }
1805
1806 static int
qeth_l3_neigh_setup(struct net_device * dev,struct neigh_parms * np)1807 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1808 {
1809 if (np->tbl->family == AF_INET)
1810 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1811
1812 return 0;
1813 }
1814
qeth_l3_osa_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)1815 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1816 struct net_device *dev,
1817 netdev_features_t features)
1818 {
1819 if (qeth_get_ip_version(skb) != 4)
1820 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1821 return qeth_features_check(skb, dev, features);
1822 }
1823
qeth_l3_iqd_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1824 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1825 struct net_device *sb_dev)
1826 {
1827 return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1828 sb_dev);
1829 }
1830
qeth_l3_osa_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1831 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1832 struct net_device *sb_dev)
1833 {
1834 struct qeth_card *card = dev->ml_priv;
1835
1836 if (qeth_uses_tx_prio_queueing(card))
1837 return qeth_get_priority_queue(card, skb);
1838
1839 return netdev_pick_tx(dev, skb, sb_dev);
1840 }
1841
1842 static const struct net_device_ops qeth_l3_netdev_ops = {
1843 .ndo_open = qeth_open,
1844 .ndo_stop = qeth_stop,
1845 .ndo_get_stats64 = qeth_get_stats64,
1846 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1847 .ndo_select_queue = qeth_l3_iqd_select_queue,
1848 .ndo_validate_addr = eth_validate_addr,
1849 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1850 .ndo_do_ioctl = qeth_do_ioctl,
1851 .ndo_fix_features = qeth_fix_features,
1852 .ndo_set_features = qeth_set_features,
1853 .ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
1854 .ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
1855 .ndo_tx_timeout = qeth_tx_timeout,
1856 };
1857
1858 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1859 .ndo_open = qeth_open,
1860 .ndo_stop = qeth_stop,
1861 .ndo_get_stats64 = qeth_get_stats64,
1862 .ndo_start_xmit = qeth_l3_hard_start_xmit,
1863 .ndo_features_check = qeth_l3_osa_features_check,
1864 .ndo_select_queue = qeth_l3_osa_select_queue,
1865 .ndo_validate_addr = eth_validate_addr,
1866 .ndo_set_rx_mode = qeth_l3_set_rx_mode,
1867 .ndo_do_ioctl = qeth_do_ioctl,
1868 .ndo_fix_features = qeth_fix_features,
1869 .ndo_set_features = qeth_set_features,
1870 .ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
1871 .ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
1872 .ndo_tx_timeout = qeth_tx_timeout,
1873 .ndo_neigh_setup = qeth_l3_neigh_setup,
1874 };
1875
qeth_l3_setup_netdev(struct qeth_card * card)1876 static int qeth_l3_setup_netdev(struct qeth_card *card)
1877 {
1878 struct net_device *dev = card->dev;
1879 unsigned int headroom;
1880 int rc;
1881
1882 if (IS_OSD(card) || IS_OSX(card)) {
1883 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1884
1885 /*IPv6 address autoconfiguration stuff*/
1886 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1887
1888 if (!IS_VM_NIC(card)) {
1889 card->dev->features |= NETIF_F_SG;
1890 card->dev->hw_features |= NETIF_F_TSO |
1891 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1892 card->dev->vlan_features |= NETIF_F_TSO |
1893 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1894 }
1895
1896 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1897 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1898 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1899 }
1900 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1901 card->dev->hw_features |= NETIF_F_TSO6;
1902 card->dev->vlan_features |= NETIF_F_TSO6;
1903 }
1904
1905 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1906 if (card->dev->hw_features & NETIF_F_TSO6)
1907 headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1908 else if (card->dev->hw_features & NETIF_F_TSO)
1909 headroom = sizeof(struct qeth_hdr_tso);
1910 else
1911 headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1912 } else if (IS_IQD(card)) {
1913 card->dev->flags |= IFF_NOARP;
1914 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1915 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1916
1917 rc = qeth_l3_iqd_read_initial_mac(card);
1918 if (rc)
1919 return rc;
1920 } else
1921 return -ENODEV;
1922
1923 card->dev->needed_headroom = headroom;
1924 card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1925 NETIF_F_HW_VLAN_CTAG_RX |
1926 NETIF_F_HW_VLAN_CTAG_FILTER;
1927
1928 netif_keep_dst(card->dev);
1929 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1930 netif_set_gso_max_size(card->dev,
1931 PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1932
1933 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1934 return register_netdev(card->dev);
1935 }
1936
1937 static const struct device_type qeth_l3_devtype = {
1938 .name = "qeth_layer3",
1939 .groups = qeth_l3_attr_groups,
1940 };
1941
qeth_l3_probe_device(struct ccwgroup_device * gdev)1942 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1943 {
1944 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1945 int rc;
1946
1947 hash_init(card->ip_htable);
1948 mutex_init(&card->ip_lock);
1949 card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1950 dev_name(&gdev->dev));
1951 if (!card->cmd_wq)
1952 return -ENOMEM;
1953
1954 if (gdev->dev.type == &qeth_generic_devtype) {
1955 rc = qeth_l3_create_device_attributes(&gdev->dev);
1956 if (rc) {
1957 destroy_workqueue(card->cmd_wq);
1958 return rc;
1959 }
1960 }
1961
1962 INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1963 return 0;
1964 }
1965
qeth_l3_remove_device(struct ccwgroup_device * cgdev)1966 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1967 {
1968 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1969
1970 if (cgdev->dev.type == &qeth_generic_devtype)
1971 qeth_l3_remove_device_attributes(&cgdev->dev);
1972
1973 qeth_set_allowed_threads(card, 0, 1);
1974 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1975
1976 if (cgdev->state == CCWGROUP_ONLINE)
1977 qeth_set_offline(card, false);
1978
1979 cancel_work_sync(&card->close_dev_work);
1980 if (card->dev->reg_state == NETREG_REGISTERED)
1981 unregister_netdev(card->dev);
1982
1983 flush_workqueue(card->cmd_wq);
1984 destroy_workqueue(card->cmd_wq);
1985 qeth_l3_clear_ip_htable(card, 0);
1986 qeth_l3_clear_ipato_list(card);
1987 }
1988
qeth_l3_set_online(struct qeth_card * card,bool carrier_ok)1989 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1990 {
1991 struct net_device *dev = card->dev;
1992 int rc = 0;
1993
1994 /* softsetup */
1995 QETH_CARD_TEXT(card, 2, "softsetp");
1996
1997 rc = qeth_l3_setadapter_parms(card);
1998 if (rc)
1999 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2000 if (!card->options.sniffer) {
2001 qeth_l3_start_ipassists(card);
2002
2003 rc = qeth_l3_setrouting_v4(card);
2004 if (rc)
2005 QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2006 rc = qeth_l3_setrouting_v6(card);
2007 if (rc)
2008 QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2009 }
2010
2011 card->state = CARD_STATE_SOFTSETUP;
2012
2013 qeth_set_allowed_threads(card, 0xffffffff, 0);
2014 qeth_l3_recover_ip(card);
2015
2016 if (dev->reg_state != NETREG_REGISTERED) {
2017 rc = qeth_l3_setup_netdev(card);
2018 if (rc)
2019 goto err_setup;
2020
2021 if (carrier_ok)
2022 netif_carrier_on(dev);
2023 } else {
2024 rtnl_lock();
2025 rc = qeth_set_real_num_tx_queues(card,
2026 qeth_tx_actual_queues(card));
2027 if (rc) {
2028 rtnl_unlock();
2029 goto err_set_queues;
2030 }
2031
2032 if (carrier_ok)
2033 netif_carrier_on(dev);
2034 else
2035 netif_carrier_off(dev);
2036
2037 netif_device_attach(dev);
2038 qeth_enable_hw_features(dev);
2039
2040 if (card->info.open_when_online) {
2041 card->info.open_when_online = 0;
2042 dev_open(dev, NULL);
2043 }
2044 rtnl_unlock();
2045 }
2046 return 0;
2047
2048 err_set_queues:
2049 err_setup:
2050 qeth_set_allowed_threads(card, 0, 1);
2051 card->state = CARD_STATE_DOWN;
2052 qeth_l3_clear_ip_htable(card, 1);
2053 return rc;
2054 }
2055
qeth_l3_set_offline(struct qeth_card * card)2056 static void qeth_l3_set_offline(struct qeth_card *card)
2057 {
2058 qeth_set_allowed_threads(card, 0, 1);
2059 qeth_l3_drain_rx_mode_cache(card);
2060
2061 if (card->options.sniffer &&
2062 (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2063 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2064
2065 if (card->state == CARD_STATE_SOFTSETUP) {
2066 card->state = CARD_STATE_DOWN;
2067 qeth_l3_clear_ip_htable(card, 1);
2068 }
2069 }
2070
2071 /* Returns zero if the command is successfully "consumed" */
qeth_l3_control_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)2072 static int qeth_l3_control_event(struct qeth_card *card,
2073 struct qeth_ipa_cmd *cmd)
2074 {
2075 return 1;
2076 }
2077
2078 const struct qeth_discipline qeth_l3_discipline = {
2079 .devtype = &qeth_l3_devtype,
2080 .setup = qeth_l3_probe_device,
2081 .remove = qeth_l3_remove_device,
2082 .set_online = qeth_l3_set_online,
2083 .set_offline = qeth_l3_set_offline,
2084 .do_ioctl = qeth_l3_do_ioctl,
2085 .control_event_handler = qeth_l3_control_event,
2086 };
2087 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2088
qeth_l3_handle_ip_event(struct qeth_card * card,struct qeth_ipaddr * addr,unsigned long event)2089 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2090 struct qeth_ipaddr *addr,
2091 unsigned long event)
2092 {
2093 switch (event) {
2094 case NETDEV_UP:
2095 qeth_l3_modify_ip(card, addr, true);
2096 return NOTIFY_OK;
2097 case NETDEV_DOWN:
2098 qeth_l3_modify_ip(card, addr, false);
2099 return NOTIFY_OK;
2100 default:
2101 return NOTIFY_DONE;
2102 }
2103 }
2104
2105 struct qeth_l3_ip_event_work {
2106 struct work_struct work;
2107 struct qeth_card *card;
2108 struct qeth_ipaddr addr;
2109 };
2110
2111 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2112
qeth_l3_add_ip_worker(struct work_struct * work)2113 static void qeth_l3_add_ip_worker(struct work_struct *work)
2114 {
2115 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2116
2117 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2118 kfree(work);
2119 }
2120
qeth_l3_delete_ip_worker(struct work_struct * work)2121 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2122 {
2123 struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2124
2125 qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2126 kfree(work);
2127 }
2128
qeth_l3_get_card_from_dev(struct net_device * dev)2129 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2130 {
2131 if (is_vlan_dev(dev))
2132 dev = vlan_dev_real_dev(dev);
2133 if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2134 dev->netdev_ops == &qeth_l3_netdev_ops)
2135 return (struct qeth_card *) dev->ml_priv;
2136 return NULL;
2137 }
2138
qeth_l3_ip_event(struct notifier_block * this,unsigned long event,void * ptr)2139 static int qeth_l3_ip_event(struct notifier_block *this,
2140 unsigned long event, void *ptr)
2141 {
2142 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2143 struct net_device *dev = ifa->ifa_dev->dev;
2144 struct qeth_ipaddr addr;
2145 struct qeth_card *card;
2146
2147 card = qeth_l3_get_card_from_dev(dev);
2148 if (!card)
2149 return NOTIFY_DONE;
2150 QETH_CARD_TEXT(card, 3, "ipevent");
2151
2152 qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2153 addr.u.a4.addr = ifa->ifa_address;
2154 addr.u.a4.mask = ifa->ifa_mask;
2155
2156 return qeth_l3_handle_ip_event(card, &addr, event);
2157 }
2158
2159 static struct notifier_block qeth_l3_ip_notifier = {
2160 qeth_l3_ip_event,
2161 NULL,
2162 };
2163
qeth_l3_ip6_event(struct notifier_block * this,unsigned long event,void * ptr)2164 static int qeth_l3_ip6_event(struct notifier_block *this,
2165 unsigned long event, void *ptr)
2166 {
2167 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2168 struct net_device *dev = ifa->idev->dev;
2169 struct qeth_l3_ip_event_work *ip_work;
2170 struct qeth_card *card;
2171
2172 if (event != NETDEV_UP && event != NETDEV_DOWN)
2173 return NOTIFY_DONE;
2174
2175 card = qeth_l3_get_card_from_dev(dev);
2176 if (!card)
2177 return NOTIFY_DONE;
2178 QETH_CARD_TEXT(card, 3, "ip6event");
2179 if (!qeth_is_supported(card, IPA_IPV6))
2180 return NOTIFY_DONE;
2181
2182 ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2183 if (!ip_work)
2184 return NOTIFY_DONE;
2185
2186 if (event == NETDEV_UP)
2187 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2188 else
2189 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2190
2191 ip_work->card = card;
2192 qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2193 QETH_PROT_IPV6);
2194 ip_work->addr.u.a6.addr = ifa->addr;
2195 ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2196
2197 queue_work(card->cmd_wq, &ip_work->work);
2198 return NOTIFY_OK;
2199 }
2200
2201 static struct notifier_block qeth_l3_ip6_notifier = {
2202 qeth_l3_ip6_event,
2203 NULL,
2204 };
2205
qeth_l3_register_notifiers(void)2206 static int qeth_l3_register_notifiers(void)
2207 {
2208 int rc;
2209
2210 QETH_DBF_TEXT(SETUP, 5, "regnotif");
2211 rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2212 if (rc)
2213 return rc;
2214 rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2215 if (rc) {
2216 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2217 return rc;
2218 }
2219 return 0;
2220 }
2221
qeth_l3_unregister_notifiers(void)2222 static void qeth_l3_unregister_notifiers(void)
2223 {
2224 QETH_DBF_TEXT(SETUP, 5, "unregnot");
2225 WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2226 WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2227 }
2228
qeth_l3_init(void)2229 static int __init qeth_l3_init(void)
2230 {
2231 pr_info("register layer 3 discipline\n");
2232 return qeth_l3_register_notifiers();
2233 }
2234
qeth_l3_exit(void)2235 static void __exit qeth_l3_exit(void)
2236 {
2237 qeth_l3_unregister_notifiers();
2238 pr_info("unregister layer 3 discipline\n");
2239 }
2240
2241 module_init(qeth_l3_init);
2242 module_exit(qeth_l3_exit);
2243 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2244 MODULE_DESCRIPTION("qeth layer 3 discipline");
2245 MODULE_LICENSE("GPL");
2246