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