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[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / hw / i40iw / i40iw_cm.c
1 /*******************************************************************************
2 *
3 * Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenFabrics.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 *******************************************************************************/
34
35 #include <linux/atomic.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/init.h>
39 #include <linux/if_arp.h>
40 #include <linux/if_vlan.h>
41 #include <linux/notifier.h>
42 #include <linux/net.h>
43 #include <linux/types.h>
44 #include <linux/timer.h>
45 #include <linux/time.h>
46 #include <linux/delay.h>
47 #include <linux/etherdevice.h>
48 #include <linux/netdevice.h>
49 #include <linux/random.h>
50 #include <linux/list.h>
51 #include <linux/threads.h>
52 #include <linux/highmem.h>
53 #include <net/arp.h>
54 #include <net/ndisc.h>
55 #include <net/neighbour.h>
56 #include <net/route.h>
57 #include <net/addrconf.h>
58 #include <net/ip6_route.h>
59 #include <net/ip_fib.h>
60 #include <net/tcp.h>
61 #include <asm/checksum.h>
62
63 #include "i40iw.h"
64
65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
67 static void i40iw_disconnect_worker(struct work_struct *work);
68
69 /**
70 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
71 * @vsi: pointer to vsi structure
72 * @buf: puda buffer to free
73 */
74 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
75 {
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = vsi->ilq;
78
79 if (!atomic_dec_return(&buf->refcount))
80 i40iw_puda_ret_bufpool(ilq, buf);
81 }
82
83 /**
84 * i40iw_derive_hw_ird_setting - Calculate IRD
85 *
86 * @cm_ird: IRD of connection's node
87 *
88 * The ird from the connection is rounded to a supported HW
89 * setting (2,8,32,64) and then encoded for ird_size field of
90 * qp_ctx
91 */
92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
93 {
94 u8 encoded_ird_size;
95 u8 pof2_cm_ird = 1;
96
97 /* round-off to next powerof2 */
98 while (pof2_cm_ird < cm_ird)
99 pof2_cm_ird *= 2;
100
101 /* ird_size field is encoded in qp_ctx */
102 switch (pof2_cm_ird) {
103 case I40IW_HW_IRD_SETTING_64:
104 encoded_ird_size = 3;
105 break;
106 case I40IW_HW_IRD_SETTING_32:
107 case I40IW_HW_IRD_SETTING_16:
108 encoded_ird_size = 2;
109 break;
110 case I40IW_HW_IRD_SETTING_8:
111 case I40IW_HW_IRD_SETTING_4:
112 encoded_ird_size = 1;
113 break;
114 case I40IW_HW_IRD_SETTING_2:
115 default:
116 encoded_ird_size = 0;
117 break;
118 }
119 return encoded_ird_size;
120 }
121
122 /**
123 * i40iw_record_ird_ord - Record IRD/ORD passed in
124 * @cm_node: connection's node
125 * @conn_ird: connection IRD
126 * @conn_ord: connection ORD
127 */
128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
129 {
130 if (conn_ird > I40IW_MAX_IRD_SIZE)
131 conn_ird = I40IW_MAX_IRD_SIZE;
132
133 if (conn_ord > I40IW_MAX_ORD_SIZE)
134 conn_ord = I40IW_MAX_ORD_SIZE;
135
136 cm_node->ird_size = conn_ird;
137 cm_node->ord_size = conn_ord;
138 }
139
140 /**
141 * i40iw_copy_ip_ntohl - change network to host ip
142 * @dst: host ip
143 * @src: big endian
144 */
145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
146 {
147 *dst++ = ntohl(*src++);
148 *dst++ = ntohl(*src++);
149 *dst++ = ntohl(*src++);
150 *dst = ntohl(*src);
151 }
152
153 /**
154 * i40iw_copy_ip_htonl - change host addr to network ip
155 * @dst: host ip
156 * @src: little endian
157 */
158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
159 {
160 *dst++ = htonl(*src++);
161 *dst++ = htonl(*src++);
162 *dst++ = htonl(*src++);
163 *dst = htonl(*src);
164 }
165
166 /**
167 * i40iw_fill_sockaddr4 - get addr info for passive connection
168 * @cm_node: connection's node
169 * @event: upper layer's cm event
170 */
171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
172 struct iw_cm_event *event)
173 {
174 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
175 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
176
177 laddr->sin_family = AF_INET;
178 raddr->sin_family = AF_INET;
179
180 laddr->sin_port = htons(cm_node->loc_port);
181 raddr->sin_port = htons(cm_node->rem_port);
182
183 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
184 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
185 }
186
187 /**
188 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
189 * @cm_node: connection's node
190 * @event: upper layer's cm event
191 */
192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
193 struct iw_cm_event *event)
194 {
195 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
196 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
197
198 laddr6->sin6_family = AF_INET6;
199 raddr6->sin6_family = AF_INET6;
200
201 laddr6->sin6_port = htons(cm_node->loc_port);
202 raddr6->sin6_port = htons(cm_node->rem_port);
203
204 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
205 cm_node->loc_addr);
206 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
207 cm_node->rem_addr);
208 }
209
210 /**
211 * i40iw_get_addr_info
212 * @cm_node: contains ip/tcp info
213 * @cm_info: to get a copy of the cm_node ip/tcp info
214 */
215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
216 struct i40iw_cm_info *cm_info)
217 {
218 cm_info->ipv4 = cm_node->ipv4;
219 cm_info->vlan_id = cm_node->vlan_id;
220 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
221 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
222 cm_info->loc_port = cm_node->loc_port;
223 cm_info->rem_port = cm_node->rem_port;
224 cm_info->user_pri = cm_node->user_pri;
225 }
226
227 /**
228 * i40iw_get_cmevent_info - for cm event upcall
229 * @cm_node: connection's node
230 * @cm_id: upper layers cm struct for the event
231 * @event: upper layer's cm event
232 */
233 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
234 struct iw_cm_id *cm_id,
235 struct iw_cm_event *event)
236 {
237 memcpy(&event->local_addr, &cm_id->m_local_addr,
238 sizeof(event->local_addr));
239 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
240 sizeof(event->remote_addr));
241 if (cm_node) {
242 event->private_data = (void *)cm_node->pdata_buf;
243 event->private_data_len = (u8)cm_node->pdata.size;
244 event->ird = cm_node->ird_size;
245 event->ord = cm_node->ord_size;
246 }
247 }
248
249 /**
250 * i40iw_send_cm_event - upcall cm's event handler
251 * @cm_node: connection's node
252 * @cm_id: upper layer's cm info struct
253 * @type: Event type to indicate
254 * @status: status for the event type
255 */
256 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
257 struct iw_cm_id *cm_id,
258 enum iw_cm_event_type type,
259 int status)
260 {
261 struct iw_cm_event event;
262
263 memset(&event, 0, sizeof(event));
264 event.event = type;
265 event.status = status;
266 switch (type) {
267 case IW_CM_EVENT_CONNECT_REQUEST:
268 if (cm_node->ipv4)
269 i40iw_fill_sockaddr4(cm_node, &event);
270 else
271 i40iw_fill_sockaddr6(cm_node, &event);
272 event.provider_data = (void *)cm_node;
273 event.private_data = (void *)cm_node->pdata_buf;
274 event.private_data_len = (u8)cm_node->pdata.size;
275 event.ird = cm_node->ird_size;
276 break;
277 case IW_CM_EVENT_CONNECT_REPLY:
278 i40iw_get_cmevent_info(cm_node, cm_id, &event);
279 break;
280 case IW_CM_EVENT_ESTABLISHED:
281 event.ird = cm_node->ird_size;
282 event.ord = cm_node->ord_size;
283 break;
284 case IW_CM_EVENT_DISCONNECT:
285 break;
286 case IW_CM_EVENT_CLOSE:
287 break;
288 default:
289 i40iw_pr_err("event type received type = %d\n", type);
290 return -1;
291 }
292 return cm_id->event_handler(cm_id, &event);
293 }
294
295 /**
296 * i40iw_create_event - create cm event
297 * @cm_node: connection's node
298 * @type: Event type to generate
299 */
300 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
301 enum i40iw_cm_event_type type)
302 {
303 struct i40iw_cm_event *event;
304
305 if (!cm_node->cm_id)
306 return NULL;
307
308 event = kzalloc(sizeof(*event), GFP_ATOMIC);
309
310 if (!event)
311 return NULL;
312
313 event->type = type;
314 event->cm_node = cm_node;
315 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
316 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
317 event->cm_info.rem_port = cm_node->rem_port;
318 event->cm_info.loc_port = cm_node->loc_port;
319 event->cm_info.cm_id = cm_node->cm_id;
320
321 i40iw_debug(cm_node->dev,
322 I40IW_DEBUG_CM,
323 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
324 cm_node,
325 event,
326 type,
327 event->cm_info.loc_addr,
328 event->cm_info.rem_addr);
329
330 i40iw_cm_post_event(event);
331 return event;
332 }
333
334 /**
335 * i40iw_free_retrans_entry - free send entry
336 * @cm_node: connection's node
337 */
338 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
339 {
340 struct i40iw_device *iwdev = cm_node->iwdev;
341 struct i40iw_timer_entry *send_entry;
342
343 send_entry = cm_node->send_entry;
344 if (send_entry) {
345 cm_node->send_entry = NULL;
346 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
347 kfree(send_entry);
348 atomic_dec(&cm_node->ref_count);
349 }
350 }
351
352 /**
353 * i40iw_cleanup_retrans_entry - free send entry with lock
354 * @cm_node: connection's node
355 */
356 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
357 {
358 unsigned long flags;
359
360 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
361 i40iw_free_retrans_entry(cm_node);
362 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
363 }
364
365 /**
366 * i40iw_form_cm_frame - get a free packet and build frame
367 * @cm_node: connection's node ionfo to use in frame
368 * @options: pointer to options info
369 * @hdr: pointer mpa header
370 * @pdata: pointer to private data
371 * @flags: indicates FIN or ACK
372 */
373 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
374 struct i40iw_kmem_info *options,
375 struct i40iw_kmem_info *hdr,
376 struct i40iw_kmem_info *pdata,
377 u8 flags)
378 {
379 struct i40iw_puda_buf *sqbuf;
380 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
381 u8 *buf;
382
383 struct tcphdr *tcph;
384 struct iphdr *iph;
385 struct ipv6hdr *ip6h;
386 struct ethhdr *ethh;
387 u16 packetsize;
388 u16 eth_hlen = ETH_HLEN;
389 u32 opts_len = 0;
390 u32 pd_len = 0;
391 u32 hdr_len = 0;
392 u16 vtag;
393
394 sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
395 if (!sqbuf)
396 return NULL;
397 buf = sqbuf->mem.va;
398
399 if (options)
400 opts_len = (u32)options->size;
401
402 if (hdr)
403 hdr_len = hdr->size;
404
405 if (pdata)
406 pd_len = pdata->size;
407
408 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
409 eth_hlen += 4;
410
411 if (cm_node->ipv4)
412 packetsize = sizeof(*iph) + sizeof(*tcph);
413 else
414 packetsize = sizeof(*ip6h) + sizeof(*tcph);
415 packetsize += opts_len + hdr_len + pd_len;
416
417 memset(buf, 0x00, eth_hlen + packetsize);
418
419 sqbuf->totallen = packetsize + eth_hlen;
420 sqbuf->maclen = eth_hlen;
421 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
422 sqbuf->scratch = (void *)cm_node;
423
424 ethh = (struct ethhdr *)buf;
425 buf += eth_hlen;
426
427 if (cm_node->ipv4) {
428 sqbuf->ipv4 = true;
429
430 iph = (struct iphdr *)buf;
431 buf += sizeof(*iph);
432 tcph = (struct tcphdr *)buf;
433 buf += sizeof(*tcph);
434
435 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
436 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
437 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
438 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
439 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
440 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
441
442 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
443 } else {
444 ethh->h_proto = htons(ETH_P_IP);
445 }
446
447 iph->version = IPVERSION;
448 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
449 iph->tos = cm_node->tos;
450 iph->tot_len = htons(packetsize);
451 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
452
453 iph->frag_off = htons(0x4000);
454 iph->ttl = 0x40;
455 iph->protocol = IPPROTO_TCP;
456 iph->saddr = htonl(cm_node->loc_addr[0]);
457 iph->daddr = htonl(cm_node->rem_addr[0]);
458 } else {
459 sqbuf->ipv4 = false;
460 ip6h = (struct ipv6hdr *)buf;
461 buf += sizeof(*ip6h);
462 tcph = (struct tcphdr *)buf;
463 buf += sizeof(*tcph);
464
465 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
466 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
467 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
468 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
469 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
470 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
471 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
472 } else {
473 ethh->h_proto = htons(ETH_P_IPV6);
474 }
475 ip6h->version = 6;
476 ip6h->priority = cm_node->tos >> 4;
477 ip6h->flow_lbl[0] = cm_node->tos << 4;
478 ip6h->flow_lbl[1] = 0;
479 ip6h->flow_lbl[2] = 0;
480 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
481 ip6h->nexthdr = 6;
482 ip6h->hop_limit = 128;
483 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
484 cm_node->loc_addr);
485 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
486 cm_node->rem_addr);
487 }
488
489 tcph->source = htons(cm_node->loc_port);
490 tcph->dest = htons(cm_node->rem_port);
491
492 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
493
494 if (flags & SET_ACK) {
495 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
496 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
497 tcph->ack = 1;
498 } else {
499 tcph->ack_seq = 0;
500 }
501
502 if (flags & SET_SYN) {
503 cm_node->tcp_cntxt.loc_seq_num++;
504 tcph->syn = 1;
505 } else {
506 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
507 }
508
509 if (flags & SET_FIN) {
510 cm_node->tcp_cntxt.loc_seq_num++;
511 tcph->fin = 1;
512 }
513
514 if (flags & SET_RST)
515 tcph->rst = 1;
516
517 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
518 sqbuf->tcphlen = tcph->doff << 2;
519 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
520 tcph->urg_ptr = 0;
521
522 if (opts_len) {
523 memcpy(buf, options->addr, opts_len);
524 buf += opts_len;
525 }
526
527 if (hdr_len) {
528 memcpy(buf, hdr->addr, hdr_len);
529 buf += hdr_len;
530 }
531
532 if (pdata && pdata->addr)
533 memcpy(buf, pdata->addr, pdata->size);
534
535 atomic_set(&sqbuf->refcount, 1);
536
537 return sqbuf;
538 }
539
540 /**
541 * i40iw_send_reset - Send RST packet
542 * @cm_node: connection's node
543 */
544 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
545 {
546 struct i40iw_puda_buf *sqbuf;
547 int flags = SET_RST | SET_ACK;
548
549 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
550 if (!sqbuf) {
551 i40iw_pr_err("no sqbuf\n");
552 return -1;
553 }
554
555 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
556 }
557
558 /**
559 * i40iw_active_open_err - send event for active side cm error
560 * @cm_node: connection's node
561 * @reset: Flag to send reset or not
562 */
563 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
564 {
565 i40iw_cleanup_retrans_entry(cm_node);
566 cm_node->cm_core->stats_connect_errs++;
567 if (reset) {
568 i40iw_debug(cm_node->dev,
569 I40IW_DEBUG_CM,
570 "%s cm_node=%p state=%d\n",
571 __func__,
572 cm_node,
573 cm_node->state);
574 atomic_inc(&cm_node->ref_count);
575 i40iw_send_reset(cm_node);
576 }
577
578 cm_node->state = I40IW_CM_STATE_CLOSED;
579 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
580 }
581
582 /**
583 * i40iw_passive_open_err - handle passive side cm error
584 * @cm_node: connection's node
585 * @reset: send reset or just free cm_node
586 */
587 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
588 {
589 i40iw_cleanup_retrans_entry(cm_node);
590 cm_node->cm_core->stats_passive_errs++;
591 cm_node->state = I40IW_CM_STATE_CLOSED;
592 i40iw_debug(cm_node->dev,
593 I40IW_DEBUG_CM,
594 "%s cm_node=%p state =%d\n",
595 __func__,
596 cm_node,
597 cm_node->state);
598 if (reset)
599 i40iw_send_reset(cm_node);
600 else
601 i40iw_rem_ref_cm_node(cm_node);
602 }
603
604 /**
605 * i40iw_event_connect_error - to create connect error event
606 * @event: cm information for connect event
607 */
608 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
609 {
610 struct i40iw_qp *iwqp;
611 struct iw_cm_id *cm_id;
612
613 cm_id = event->cm_node->cm_id;
614 if (!cm_id)
615 return;
616
617 iwqp = cm_id->provider_data;
618
619 if (!iwqp || !iwqp->iwdev)
620 return;
621
622 iwqp->cm_id = NULL;
623 cm_id->provider_data = NULL;
624 i40iw_send_cm_event(event->cm_node, cm_id,
625 IW_CM_EVENT_CONNECT_REPLY,
626 -ECONNRESET);
627 cm_id->rem_ref(cm_id);
628 i40iw_rem_ref_cm_node(event->cm_node);
629 }
630
631 /**
632 * i40iw_process_options
633 * @cm_node: connection's node
634 * @optionsloc: point to start of options
635 * @optionsize: size of all options
636 * @syn_packet: flag if syn packet
637 */
638 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
639 u8 *optionsloc,
640 u32 optionsize,
641 u32 syn_packet)
642 {
643 u32 tmp;
644 u32 offset = 0;
645 union all_known_options *all_options;
646 char got_mss_option = 0;
647
648 while (offset < optionsize) {
649 all_options = (union all_known_options *)(optionsloc + offset);
650 switch (all_options->as_base.optionnum) {
651 case OPTION_NUMBER_END:
652 offset = optionsize;
653 break;
654 case OPTION_NUMBER_NONE:
655 offset += 1;
656 continue;
657 case OPTION_NUMBER_MSS:
658 i40iw_debug(cm_node->dev,
659 I40IW_DEBUG_CM,
660 "%s: MSS Length: %d Offset: %d Size: %d\n",
661 __func__,
662 all_options->as_mss.length,
663 offset,
664 optionsize);
665 got_mss_option = 1;
666 if (all_options->as_mss.length != 4)
667 return -1;
668 tmp = ntohs(all_options->as_mss.mss);
669 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
670 cm_node->tcp_cntxt.mss = tmp;
671 break;
672 case OPTION_NUMBER_WINDOW_SCALE:
673 cm_node->tcp_cntxt.snd_wscale =
674 all_options->as_windowscale.shiftcount;
675 break;
676 default:
677 i40iw_debug(cm_node->dev,
678 I40IW_DEBUG_CM,
679 "TCP Option not understood: %x\n",
680 all_options->as_base.optionnum);
681 break;
682 }
683 offset += all_options->as_base.length;
684 }
685 if (!got_mss_option && syn_packet)
686 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
687 return 0;
688 }
689
690 /**
691 * i40iw_handle_tcp_options -
692 * @cm_node: connection's node
693 * @tcph: pointer tcp header
694 * @optionsize: size of options rcvd
695 * @passive: active or passive flag
696 */
697 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
698 struct tcphdr *tcph,
699 int optionsize,
700 int passive)
701 {
702 u8 *optionsloc = (u8 *)&tcph[1];
703
704 if (optionsize) {
705 if (i40iw_process_options(cm_node,
706 optionsloc,
707 optionsize,
708 (u32)tcph->syn)) {
709 i40iw_debug(cm_node->dev,
710 I40IW_DEBUG_CM,
711 "%s: Node %p, Sending RESET\n",
712 __func__,
713 cm_node);
714 if (passive)
715 i40iw_passive_open_err(cm_node, true);
716 else
717 i40iw_active_open_err(cm_node, true);
718 return -1;
719 }
720 }
721
722 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
723 cm_node->tcp_cntxt.snd_wscale;
724
725 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
726 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
727 return 0;
728 }
729
730 /**
731 * i40iw_build_mpa_v1 - build a MPA V1 frame
732 * @cm_node: connection's node
733 * @mpa_key: to do read0 or write0
734 */
735 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
736 void *start_addr,
737 u8 mpa_key)
738 {
739 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
740
741 switch (mpa_key) {
742 case MPA_KEY_REQUEST:
743 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
744 break;
745 case MPA_KEY_REPLY:
746 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
747 break;
748 default:
749 break;
750 }
751 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
752 mpa_frame->rev = cm_node->mpa_frame_rev;
753 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
754 }
755
756 /**
757 * i40iw_build_mpa_v2 - build a MPA V2 frame
758 * @cm_node: connection's node
759 * @start_addr: buffer start address
760 * @mpa_key: to do read0 or write0
761 */
762 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
763 void *start_addr,
764 u8 mpa_key)
765 {
766 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
767 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
768 u16 ctrl_ird, ctrl_ord;
769
770 /* initialize the upper 5 bytes of the frame */
771 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
772 mpa_frame->flags |= IETF_MPA_V2_FLAG;
773 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
774
775 /* initialize RTR msg */
776 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
777 ctrl_ird = IETF_NO_IRD_ORD;
778 ctrl_ord = IETF_NO_IRD_ORD;
779 } else {
780 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
781 IETF_NO_IRD_ORD : cm_node->ird_size;
782 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
783 IETF_NO_IRD_ORD : cm_node->ord_size;
784 }
785
786 ctrl_ird |= IETF_PEER_TO_PEER;
787
788 switch (mpa_key) {
789 case MPA_KEY_REQUEST:
790 ctrl_ord |= IETF_RDMA0_WRITE;
791 ctrl_ord |= IETF_RDMA0_READ;
792 break;
793 case MPA_KEY_REPLY:
794 switch (cm_node->send_rdma0_op) {
795 case SEND_RDMA_WRITE_ZERO:
796 ctrl_ord |= IETF_RDMA0_WRITE;
797 break;
798 case SEND_RDMA_READ_ZERO:
799 ctrl_ord |= IETF_RDMA0_READ;
800 break;
801 }
802 break;
803 default:
804 break;
805 }
806 rtr_msg->ctrl_ird = htons(ctrl_ird);
807 rtr_msg->ctrl_ord = htons(ctrl_ord);
808 }
809
810 /**
811 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
812 * @cm_node: connection's node
813 * @mpa: mpa: data buffer
814 * @mpa_key: to do read0 or write0
815 */
816 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
817 struct i40iw_kmem_info *mpa,
818 u8 mpa_key)
819 {
820 int hdr_len = 0;
821
822 switch (cm_node->mpa_frame_rev) {
823 case IETF_MPA_V1:
824 hdr_len = sizeof(struct ietf_mpa_v1);
825 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
826 break;
827 case IETF_MPA_V2:
828 hdr_len = sizeof(struct ietf_mpa_v2);
829 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
830 break;
831 default:
832 break;
833 }
834
835 return hdr_len;
836 }
837
838 /**
839 * i40iw_send_mpa_request - active node send mpa request to passive node
840 * @cm_node: connection's node
841 */
842 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
843 {
844 struct i40iw_puda_buf *sqbuf;
845
846 if (!cm_node) {
847 i40iw_pr_err("cm_node == NULL\n");
848 return -1;
849 }
850
851 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
852 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
853 &cm_node->mpa_hdr,
854 MPA_KEY_REQUEST);
855 if (!cm_node->mpa_hdr.size) {
856 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
857 return -1;
858 }
859
860 sqbuf = i40iw_form_cm_frame(cm_node,
861 NULL,
862 &cm_node->mpa_hdr,
863 &cm_node->pdata,
864 SET_ACK);
865 if (!sqbuf) {
866 i40iw_pr_err("sq_buf == NULL\n");
867 return -1;
868 }
869 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
870 }
871
872 /**
873 * i40iw_send_mpa_reject -
874 * @cm_node: connection's node
875 * @pdata: reject data for connection
876 * @plen: length of reject data
877 */
878 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
879 const void *pdata,
880 u8 plen)
881 {
882 struct i40iw_puda_buf *sqbuf;
883 struct i40iw_kmem_info priv_info;
884
885 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
886 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
887 &cm_node->mpa_hdr,
888 MPA_KEY_REPLY);
889
890 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
891 priv_info.addr = (void *)pdata;
892 priv_info.size = plen;
893
894 sqbuf = i40iw_form_cm_frame(cm_node,
895 NULL,
896 &cm_node->mpa_hdr,
897 &priv_info,
898 SET_ACK | SET_FIN);
899 if (!sqbuf) {
900 i40iw_pr_err("no sqbuf\n");
901 return -ENOMEM;
902 }
903 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
904 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
905 }
906
907 /**
908 * recv_mpa - process an IETF MPA frame
909 * @cm_node: connection's node
910 * @buffer: Data pointer
911 * @type: to return accept or reject
912 * @len: Len of mpa buffer
913 */
914 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
915 {
916 struct ietf_mpa_v1 *mpa_frame;
917 struct ietf_mpa_v2 *mpa_v2_frame;
918 struct ietf_rtr_msg *rtr_msg;
919 int mpa_hdr_len;
920 int priv_data_len;
921
922 *type = I40IW_MPA_REQUEST_ACCEPT;
923
924 if (len < sizeof(struct ietf_mpa_v1)) {
925 i40iw_pr_err("ietf buffer small (%x)\n", len);
926 return -1;
927 }
928
929 mpa_frame = (struct ietf_mpa_v1 *)buffer;
930 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
931 priv_data_len = ntohs(mpa_frame->priv_data_len);
932
933 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
934 i40iw_pr_err("large pri_data %d\n", priv_data_len);
935 return -1;
936 }
937 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
938 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
939 return -1;
940 }
941 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
942 i40iw_pr_err("rev %d\n", mpa_frame->rev);
943 return -1;
944 }
945 cm_node->mpa_frame_rev = mpa_frame->rev;
946
947 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
948 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
949 i40iw_pr_err("Unexpected MPA Key received\n");
950 return -1;
951 }
952 } else {
953 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
954 i40iw_pr_err("Unexpected MPA Key received\n");
955 return -1;
956 }
957 }
958
959 if (priv_data_len + mpa_hdr_len > len) {
960 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
961 priv_data_len, mpa_hdr_len, len);
962 return -1;
963 }
964 if (len > MAX_CM_BUFFER) {
965 i40iw_pr_err("ietf buffer large len = %d\n", len);
966 return -1;
967 }
968
969 switch (mpa_frame->rev) {
970 case IETF_MPA_V2:{
971 u16 ird_size;
972 u16 ord_size;
973 u16 ctrl_ord;
974 u16 ctrl_ird;
975
976 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
977 mpa_hdr_len += IETF_RTR_MSG_SIZE;
978 rtr_msg = &mpa_v2_frame->rtr_msg;
979
980 /* parse rtr message */
981 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
982 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
983 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
984 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
985
986 if (!(ctrl_ird & IETF_PEER_TO_PEER))
987 return -1;
988
989 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
990 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
991 goto negotiate_done;
992 }
993
994 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
995 /* responder */
996 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
997 cm_node->ird_size = 1;
998 if (cm_node->ord_size > ird_size)
999 cm_node->ord_size = ird_size;
1000 } else {
1001 /* initiator */
1002 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1003 return -1;
1004 if (cm_node->ord_size > ird_size)
1005 cm_node->ord_size = ird_size;
1006
1007 if (cm_node->ird_size < ord_size)
1008 /* no resources available */
1009 return -1;
1010 }
1011
1012 negotiate_done:
1013 if (ctrl_ord & IETF_RDMA0_READ)
1014 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1015 else if (ctrl_ord & IETF_RDMA0_WRITE)
1016 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1017 else /* Not supported RDMA0 operation */
1018 return -1;
1019 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1020 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1021 cm_node->ord_size, cm_node->ird_size);
1022 break;
1023 }
1024 break;
1025 case IETF_MPA_V1:
1026 default:
1027 break;
1028 }
1029
1030 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1031 cm_node->pdata.size = priv_data_len;
1032
1033 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1034 *type = I40IW_MPA_REQUEST_REJECT;
1035
1036 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1037 cm_node->snd_mark_en = true;
1038
1039 return 0;
1040 }
1041
1042 /**
1043 * i40iw_schedule_cm_timer
1044 * @@cm_node: connection's node
1045 * @sqbuf: buffer to send
1046 * @type: if it is send or close
1047 * @send_retrans: if rexmits to be done
1048 * @close_when_complete: is cm_node to be removed
1049 *
1050 * note - cm_node needs to be protected before calling this. Encase in:
1051 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1052 * i40iw_schedule_cm_timer(...)
1053 * atomic_inc(&cm_node->ref_count);
1054 */
1055 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1056 struct i40iw_puda_buf *sqbuf,
1057 enum i40iw_timer_type type,
1058 int send_retrans,
1059 int close_when_complete)
1060 {
1061 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1062 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1063 struct i40iw_timer_entry *new_send;
1064 int ret = 0;
1065 u32 was_timer_set;
1066 unsigned long flags;
1067
1068 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1069 if (!new_send) {
1070 if (type != I40IW_TIMER_TYPE_CLOSE)
1071 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1072 return -ENOMEM;
1073 }
1074 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1075 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1076 new_send->sqbuf = sqbuf;
1077 new_send->timetosend = jiffies;
1078 new_send->type = type;
1079 new_send->send_retrans = send_retrans;
1080 new_send->close_when_complete = close_when_complete;
1081
1082 if (type == I40IW_TIMER_TYPE_CLOSE) {
1083 new_send->timetosend += (HZ / 10);
1084 if (cm_node->close_entry) {
1085 kfree(new_send);
1086 i40iw_pr_err("already close entry\n");
1087 return -EINVAL;
1088 }
1089 cm_node->close_entry = new_send;
1090 }
1091
1092 if (type == I40IW_TIMER_TYPE_SEND) {
1093 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1094 cm_node->send_entry = new_send;
1095 atomic_inc(&cm_node->ref_count);
1096 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1097 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1098
1099 atomic_inc(&sqbuf->refcount);
1100 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1101 if (!send_retrans) {
1102 i40iw_cleanup_retrans_entry(cm_node);
1103 if (close_when_complete)
1104 i40iw_rem_ref_cm_node(cm_node);
1105 return ret;
1106 }
1107 }
1108
1109 spin_lock_irqsave(&cm_core->ht_lock, flags);
1110 was_timer_set = timer_pending(&cm_core->tcp_timer);
1111
1112 if (!was_timer_set) {
1113 cm_core->tcp_timer.expires = new_send->timetosend;
1114 add_timer(&cm_core->tcp_timer);
1115 }
1116 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1117
1118 return ret;
1119 }
1120
1121 /**
1122 * i40iw_retrans_expired - Could not rexmit the packet
1123 * @cm_node: connection's node
1124 */
1125 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1126 {
1127 struct iw_cm_id *cm_id = cm_node->cm_id;
1128 enum i40iw_cm_node_state state = cm_node->state;
1129
1130 cm_node->state = I40IW_CM_STATE_CLOSED;
1131 switch (state) {
1132 case I40IW_CM_STATE_SYN_RCVD:
1133 case I40IW_CM_STATE_CLOSING:
1134 i40iw_rem_ref_cm_node(cm_node);
1135 break;
1136 case I40IW_CM_STATE_FIN_WAIT1:
1137 case I40IW_CM_STATE_LAST_ACK:
1138 if (cm_node->cm_id)
1139 cm_id->rem_ref(cm_id);
1140 i40iw_send_reset(cm_node);
1141 break;
1142 default:
1143 atomic_inc(&cm_node->ref_count);
1144 i40iw_send_reset(cm_node);
1145 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1146 break;
1147 }
1148 }
1149
1150 /**
1151 * i40iw_handle_close_entry - for handling retry/timeouts
1152 * @cm_node: connection's node
1153 * @rem_node: flag for remove cm_node
1154 */
1155 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1156 {
1157 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1158 struct iw_cm_id *cm_id = cm_node->cm_id;
1159 struct i40iw_qp *iwqp;
1160 unsigned long flags;
1161
1162 if (!close_entry)
1163 return;
1164 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1165 if (iwqp) {
1166 spin_lock_irqsave(&iwqp->lock, flags);
1167 if (iwqp->cm_id) {
1168 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1169 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1170 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1171 iwqp->ibqp_state = IB_QPS_ERR;
1172 spin_unlock_irqrestore(&iwqp->lock, flags);
1173 i40iw_cm_disconn(iwqp);
1174 } else {
1175 spin_unlock_irqrestore(&iwqp->lock, flags);
1176 }
1177 } else if (rem_node) {
1178 /* TIME_WAIT state */
1179 i40iw_rem_ref_cm_node(cm_node);
1180 }
1181 if (cm_id)
1182 cm_id->rem_ref(cm_id);
1183 kfree(close_entry);
1184 cm_node->close_entry = NULL;
1185 }
1186
1187 /**
1188 * i40iw_cm_timer_tick - system's timer expired callback
1189 * @pass: Pointing to cm_core
1190 */
1191 static void i40iw_cm_timer_tick(struct timer_list *t)
1192 {
1193 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1194 struct i40iw_cm_node *cm_node;
1195 struct i40iw_timer_entry *send_entry, *close_entry;
1196 struct list_head *list_core_temp;
1197 struct i40iw_sc_vsi *vsi;
1198 struct list_head *list_node;
1199 struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1200 u32 settimer = 0;
1201 unsigned long timetosend;
1202 unsigned long flags;
1203
1204 struct list_head timer_list;
1205
1206 INIT_LIST_HEAD(&timer_list);
1207 spin_lock_irqsave(&cm_core->ht_lock, flags);
1208
1209 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1210 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1211 if (cm_node->close_entry || cm_node->send_entry) {
1212 atomic_inc(&cm_node->ref_count);
1213 list_add(&cm_node->timer_entry, &timer_list);
1214 }
1215 }
1216 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1217
1218 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1219 cm_node = container_of(list_node,
1220 struct i40iw_cm_node,
1221 timer_entry);
1222 close_entry = cm_node->close_entry;
1223
1224 if (close_entry) {
1225 if (time_after(close_entry->timetosend, jiffies)) {
1226 if (nexttimeout > close_entry->timetosend ||
1227 !settimer) {
1228 nexttimeout = close_entry->timetosend;
1229 settimer = 1;
1230 }
1231 } else {
1232 i40iw_handle_close_entry(cm_node, 1);
1233 }
1234 }
1235
1236 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1237
1238 send_entry = cm_node->send_entry;
1239 if (!send_entry)
1240 goto done;
1241 if (time_after(send_entry->timetosend, jiffies)) {
1242 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1243 if ((nexttimeout > send_entry->timetosend) ||
1244 !settimer) {
1245 nexttimeout = send_entry->timetosend;
1246 settimer = 1;
1247 }
1248 } else {
1249 i40iw_free_retrans_entry(cm_node);
1250 }
1251 goto done;
1252 }
1253
1254 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1255 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1256 i40iw_free_retrans_entry(cm_node);
1257 goto done;
1258 }
1259
1260 if (!send_entry->retranscount || !send_entry->retrycount) {
1261 i40iw_free_retrans_entry(cm_node);
1262
1263 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1264 i40iw_retrans_expired(cm_node);
1265 cm_node->state = I40IW_CM_STATE_CLOSED;
1266 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1267 goto done;
1268 }
1269 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1270
1271 vsi = &cm_node->iwdev->vsi;
1272
1273 if (!cm_node->ack_rcvd) {
1274 atomic_inc(&send_entry->sqbuf->refcount);
1275 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1276 cm_node->cm_core->stats_pkt_retrans++;
1277 }
1278 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1279 if (send_entry->send_retrans) {
1280 send_entry->retranscount--;
1281 timetosend = (I40IW_RETRY_TIMEOUT <<
1282 (I40IW_DEFAULT_RETRANS -
1283 send_entry->retranscount));
1284
1285 send_entry->timetosend = jiffies +
1286 min(timetosend, I40IW_MAX_TIMEOUT);
1287 if (nexttimeout > send_entry->timetosend || !settimer) {
1288 nexttimeout = send_entry->timetosend;
1289 settimer = 1;
1290 }
1291 } else {
1292 int close_when_complete;
1293
1294 close_when_complete = send_entry->close_when_complete;
1295 i40iw_debug(cm_node->dev,
1296 I40IW_DEBUG_CM,
1297 "cm_node=%p state=%d\n",
1298 cm_node,
1299 cm_node->state);
1300 i40iw_free_retrans_entry(cm_node);
1301 if (close_when_complete)
1302 i40iw_rem_ref_cm_node(cm_node);
1303 }
1304 done:
1305 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1306 i40iw_rem_ref_cm_node(cm_node);
1307 }
1308
1309 if (settimer) {
1310 spin_lock_irqsave(&cm_core->ht_lock, flags);
1311 if (!timer_pending(&cm_core->tcp_timer)) {
1312 cm_core->tcp_timer.expires = nexttimeout;
1313 add_timer(&cm_core->tcp_timer);
1314 }
1315 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1316 }
1317 }
1318
1319 /**
1320 * i40iw_send_syn - send SYN packet
1321 * @cm_node: connection's node
1322 * @sendack: flag to set ACK bit or not
1323 */
1324 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1325 {
1326 struct i40iw_puda_buf *sqbuf;
1327 int flags = SET_SYN;
1328 char optionsbuffer[sizeof(struct option_mss) +
1329 sizeof(struct option_windowscale) +
1330 sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1331 struct i40iw_kmem_info opts;
1332
1333 int optionssize = 0;
1334 /* Sending MSS option */
1335 union all_known_options *options;
1336
1337 opts.addr = optionsbuffer;
1338 if (!cm_node) {
1339 i40iw_pr_err("no cm_node\n");
1340 return -EINVAL;
1341 }
1342
1343 options = (union all_known_options *)&optionsbuffer[optionssize];
1344 options->as_mss.optionnum = OPTION_NUMBER_MSS;
1345 options->as_mss.length = sizeof(struct option_mss);
1346 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1347 optionssize += sizeof(struct option_mss);
1348
1349 options = (union all_known_options *)&optionsbuffer[optionssize];
1350 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1351 options->as_windowscale.length = sizeof(struct option_windowscale);
1352 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1353 optionssize += sizeof(struct option_windowscale);
1354 options = (union all_known_options *)&optionsbuffer[optionssize];
1355 options->as_end = OPTION_NUMBER_END;
1356 optionssize += 1;
1357
1358 if (sendack)
1359 flags |= SET_ACK;
1360
1361 opts.size = optionssize;
1362
1363 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1364 if (!sqbuf) {
1365 i40iw_pr_err("no sqbuf\n");
1366 return -1;
1367 }
1368 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1369 }
1370
1371 /**
1372 * i40iw_send_ack - Send ACK packet
1373 * @cm_node: connection's node
1374 */
1375 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1376 {
1377 struct i40iw_puda_buf *sqbuf;
1378 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1379
1380 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1381 if (sqbuf)
1382 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1383 else
1384 i40iw_pr_err("no sqbuf\n");
1385 }
1386
1387 /**
1388 * i40iw_send_fin - Send FIN pkt
1389 * @cm_node: connection's node
1390 */
1391 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1392 {
1393 struct i40iw_puda_buf *sqbuf;
1394
1395 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1396 if (!sqbuf) {
1397 i40iw_pr_err("no sqbuf\n");
1398 return -1;
1399 }
1400 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1401 }
1402
1403 /**
1404 * i40iw_find_node - find a cm node that matches the reference cm node
1405 * @cm_core: cm's core
1406 * @rem_port: remote tcp port num
1407 * @rem_addr: remote ip addr
1408 * @loc_port: local tcp port num
1409 * @loc_addr: loc ip addr
1410 * @add_refcnt: flag to increment refcount of cm_node
1411 */
1412 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1413 u16 rem_port,
1414 u32 *rem_addr,
1415 u16 loc_port,
1416 u32 *loc_addr,
1417 bool add_refcnt)
1418 {
1419 struct list_head *hte;
1420 struct i40iw_cm_node *cm_node;
1421 unsigned long flags;
1422
1423 hte = &cm_core->connected_nodes;
1424
1425 /* walk list and find cm_node associated with this session ID */
1426 spin_lock_irqsave(&cm_core->ht_lock, flags);
1427 list_for_each_entry(cm_node, hte, list) {
1428 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1429 (cm_node->loc_port == loc_port) &&
1430 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1431 (cm_node->rem_port == rem_port)) {
1432 if (add_refcnt)
1433 atomic_inc(&cm_node->ref_count);
1434 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1435 return cm_node;
1436 }
1437 }
1438 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1439
1440 /* no owner node */
1441 return NULL;
1442 }
1443
1444 /**
1445 * i40iw_find_listener - find a cm node listening on this addr-port pair
1446 * @cm_core: cm's core
1447 * @dst_port: listener tcp port num
1448 * @dst_addr: listener ip addr
1449 * @listener_state: state to match with listen node's
1450 */
1451 static struct i40iw_cm_listener *i40iw_find_listener(
1452 struct i40iw_cm_core *cm_core,
1453 u32 *dst_addr,
1454 u16 dst_port,
1455 u16 vlan_id,
1456 enum i40iw_cm_listener_state
1457 listener_state)
1458 {
1459 struct i40iw_cm_listener *listen_node;
1460 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1461 u32 listen_addr[4];
1462 u16 listen_port;
1463 unsigned long flags;
1464
1465 /* walk list and find cm_node associated with this session ID */
1466 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1467 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1468 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1469 listen_port = listen_node->loc_port;
1470 /* compare node pair, return node handle if a match */
1471 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1472 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1473 (listen_port == dst_port) &&
1474 (listener_state & listen_node->listener_state)) {
1475 atomic_inc(&listen_node->ref_count);
1476 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1477 return listen_node;
1478 }
1479 }
1480 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1481 return NULL;
1482 }
1483
1484 /**
1485 * i40iw_add_hte_node - add a cm node to the hash table
1486 * @cm_core: cm's core
1487 * @cm_node: connection's node
1488 */
1489 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1490 struct i40iw_cm_node *cm_node)
1491 {
1492 struct list_head *hte;
1493 unsigned long flags;
1494
1495 if (!cm_node || !cm_core) {
1496 i40iw_pr_err("cm_node or cm_core == NULL\n");
1497 return;
1498 }
1499 spin_lock_irqsave(&cm_core->ht_lock, flags);
1500
1501 /* get a handle on the hash table element (list head for this slot) */
1502 hte = &cm_core->connected_nodes;
1503 list_add_tail(&cm_node->list, hte);
1504 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1505 }
1506
1507 /**
1508 * i40iw_port_in_use - determine if port is in use
1509 * @port: port number
1510 * @active_side: flag for listener side vs active side
1511 */
1512 static bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port, bool active_side)
1513 {
1514 struct i40iw_cm_listener *listen_node;
1515 struct i40iw_cm_node *cm_node;
1516 unsigned long flags;
1517 bool ret = false;
1518
1519 if (active_side) {
1520 /* search connected node list */
1521 spin_lock_irqsave(&cm_core->ht_lock, flags);
1522 list_for_each_entry(cm_node, &cm_core->connected_nodes, list) {
1523 if (cm_node->loc_port == port) {
1524 ret = true;
1525 break;
1526 }
1527 }
1528 if (!ret)
1529 clear_bit(port, cm_core->active_side_ports);
1530 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1531 } else {
1532 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1533 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1534 if (listen_node->loc_port == port) {
1535 ret = true;
1536 break;
1537 }
1538 }
1539 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1540 }
1541
1542 return ret;
1543 }
1544
1545 /**
1546 * i40iw_del_multiple_qhash - Remove qhash and child listens
1547 * @iwdev: iWarp device
1548 * @cm_info: CM info for parent listen node
1549 * @cm_parent_listen_node: The parent listen node
1550 */
1551 static enum i40iw_status_code i40iw_del_multiple_qhash(
1552 struct i40iw_device *iwdev,
1553 struct i40iw_cm_info *cm_info,
1554 struct i40iw_cm_listener *cm_parent_listen_node)
1555 {
1556 struct i40iw_cm_listener *child_listen_node;
1557 enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1558 struct list_head *pos, *tpos;
1559 unsigned long flags;
1560
1561 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1562 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1563 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1564 if (child_listen_node->ipv4)
1565 i40iw_debug(&iwdev->sc_dev,
1566 I40IW_DEBUG_CM,
1567 "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1568 child_listen_node->loc_addr,
1569 child_listen_node->loc_port,
1570 child_listen_node->vlan_id);
1571 else
1572 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1573 "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1574 child_listen_node->loc_addr,
1575 child_listen_node->loc_port,
1576 child_listen_node->vlan_id);
1577 list_del(pos);
1578 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1579 sizeof(cm_info->loc_addr));
1580 cm_info->vlan_id = child_listen_node->vlan_id;
1581 if (child_listen_node->qhash_set) {
1582 ret = i40iw_manage_qhash(iwdev, cm_info,
1583 I40IW_QHASH_TYPE_TCP_SYN,
1584 I40IW_QHASH_MANAGE_TYPE_DELETE,
1585 NULL, false);
1586 child_listen_node->qhash_set = false;
1587 } else {
1588 ret = I40IW_SUCCESS;
1589 }
1590 i40iw_debug(&iwdev->sc_dev,
1591 I40IW_DEBUG_CM,
1592 "freed pointer = %p\n",
1593 child_listen_node);
1594 kfree(child_listen_node);
1595 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1596 }
1597 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1598
1599 return ret;
1600 }
1601
1602 /**
1603 * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1604 * @addr: local IPv6 address
1605 * @vlan_id: vlan id for the given IPv6 address
1606 *
1607 * Returns the net_device of the IPv6 address and also sets the
1608 * vlan id for that address.
1609 */
1610 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1611 {
1612 struct net_device *ip_dev = NULL;
1613 struct in6_addr laddr6;
1614
1615 if (!IS_ENABLED(CONFIG_IPV6))
1616 return NULL;
1617 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1618 if (vlan_id)
1619 *vlan_id = I40IW_NO_VLAN;
1620 rcu_read_lock();
1621 for_each_netdev_rcu(&init_net, ip_dev) {
1622 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1623 if (vlan_id)
1624 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1625 break;
1626 }
1627 }
1628 rcu_read_unlock();
1629 return ip_dev;
1630 }
1631
1632 /**
1633 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1634 * @addr: local IPv4 address
1635 */
1636 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1637 {
1638 struct net_device *netdev;
1639 u16 vlan_id = I40IW_NO_VLAN;
1640
1641 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1642 if (netdev) {
1643 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1644 dev_put(netdev);
1645 }
1646 return vlan_id;
1647 }
1648
1649 /**
1650 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1651 * @iwdev: iWarp device
1652 * @cm_info: CM info for parent listen node
1653 * @cm_parent_listen_node: The parent listen node
1654 *
1655 * Adds a qhash and a child listen node for every IPv6 address
1656 * on the adapter and adds the associated qhash filter
1657 */
1658 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1659 struct i40iw_cm_info *cm_info,
1660 struct i40iw_cm_listener *cm_parent_listen_node)
1661 {
1662 struct net_device *ip_dev;
1663 struct inet6_dev *idev;
1664 struct inet6_ifaddr *ifp, *tmp;
1665 enum i40iw_status_code ret = 0;
1666 struct i40iw_cm_listener *child_listen_node;
1667 unsigned long flags;
1668
1669 rtnl_lock();
1670 for_each_netdev_rcu(&init_net, ip_dev) {
1671 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1672 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1673 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1674 idev = __in6_dev_get(ip_dev);
1675 if (!idev) {
1676 i40iw_pr_err("idev == NULL\n");
1677 break;
1678 }
1679 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1680 i40iw_debug(&iwdev->sc_dev,
1681 I40IW_DEBUG_CM,
1682 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1683 &ifp->addr,
1684 rdma_vlan_dev_vlan_id(ip_dev),
1685 ip_dev->dev_addr);
1686 child_listen_node =
1687 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1688 i40iw_debug(&iwdev->sc_dev,
1689 I40IW_DEBUG_CM,
1690 "Allocating child listener %p\n",
1691 child_listen_node);
1692 if (!child_listen_node) {
1693 ret = I40IW_ERR_NO_MEMORY;
1694 goto exit;
1695 }
1696 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1697 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1698
1699 memcpy(child_listen_node, cm_parent_listen_node,
1700 sizeof(*child_listen_node));
1701
1702 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1703 ifp->addr.in6_u.u6_addr32);
1704 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1705 sizeof(cm_info->loc_addr));
1706
1707 ret = i40iw_manage_qhash(iwdev, cm_info,
1708 I40IW_QHASH_TYPE_TCP_SYN,
1709 I40IW_QHASH_MANAGE_TYPE_ADD,
1710 NULL, true);
1711 if (!ret) {
1712 child_listen_node->qhash_set = true;
1713 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1714 list_add(&child_listen_node->child_listen_list,
1715 &cm_parent_listen_node->child_listen_list);
1716 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1717 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1718 } else {
1719 kfree(child_listen_node);
1720 }
1721 }
1722 }
1723 }
1724 exit:
1725 rtnl_unlock();
1726 return ret;
1727 }
1728
1729 /**
1730 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1731 * @iwdev: iWarp device
1732 * @cm_info: CM info for parent listen node
1733 * @cm_parent_listen_node: The parent listen node
1734 *
1735 * Adds a qhash and a child listen node for every IPv4 address
1736 * on the adapter and adds the associated qhash filter
1737 */
1738 static enum i40iw_status_code i40iw_add_mqh_4(
1739 struct i40iw_device *iwdev,
1740 struct i40iw_cm_info *cm_info,
1741 struct i40iw_cm_listener *cm_parent_listen_node)
1742 {
1743 struct net_device *dev;
1744 struct in_device *idev;
1745 struct i40iw_cm_listener *child_listen_node;
1746 enum i40iw_status_code ret = 0;
1747 unsigned long flags;
1748
1749 rtnl_lock();
1750 for_each_netdev(&init_net, dev) {
1751 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1752 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1753 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1754 idev = in_dev_get(dev);
1755 for_ifa(idev) {
1756 i40iw_debug(&iwdev->sc_dev,
1757 I40IW_DEBUG_CM,
1758 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1759 &ifa->ifa_address,
1760 rdma_vlan_dev_vlan_id(dev),
1761 dev->dev_addr);
1762 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1763 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1764 i40iw_debug(&iwdev->sc_dev,
1765 I40IW_DEBUG_CM,
1766 "Allocating child listener %p\n",
1767 child_listen_node);
1768 if (!child_listen_node) {
1769 in_dev_put(idev);
1770 ret = I40IW_ERR_NO_MEMORY;
1771 goto exit;
1772 }
1773 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1774 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1775 memcpy(child_listen_node,
1776 cm_parent_listen_node,
1777 sizeof(*child_listen_node));
1778
1779 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1780 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1781 sizeof(cm_info->loc_addr));
1782
1783 ret = i40iw_manage_qhash(iwdev,
1784 cm_info,
1785 I40IW_QHASH_TYPE_TCP_SYN,
1786 I40IW_QHASH_MANAGE_TYPE_ADD,
1787 NULL,
1788 true);
1789 if (!ret) {
1790 child_listen_node->qhash_set = true;
1791 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1792 list_add(&child_listen_node->child_listen_list,
1793 &cm_parent_listen_node->child_listen_list);
1794 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1795 } else {
1796 kfree(child_listen_node);
1797 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1798 }
1799 }
1800 endfor_ifa(idev);
1801 in_dev_put(idev);
1802 }
1803 }
1804 exit:
1805 rtnl_unlock();
1806 return ret;
1807 }
1808
1809 /**
1810 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1811 * @cm_core: cm's core
1812 * @free_hanging_nodes: to free associated cm_nodes
1813 * @apbvt_del: flag to delete the apbvt
1814 */
1815 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1816 struct i40iw_cm_listener *listener,
1817 int free_hanging_nodes, bool apbvt_del)
1818 {
1819 int ret = -EINVAL;
1820 int err = 0;
1821 struct list_head *list_pos;
1822 struct list_head *list_temp;
1823 struct i40iw_cm_node *cm_node;
1824 struct list_head reset_list;
1825 struct i40iw_cm_info nfo;
1826 struct i40iw_cm_node *loopback;
1827 enum i40iw_cm_node_state old_state;
1828 unsigned long flags;
1829
1830 /* free non-accelerated child nodes for this listener */
1831 INIT_LIST_HEAD(&reset_list);
1832 if (free_hanging_nodes) {
1833 spin_lock_irqsave(&cm_core->ht_lock, flags);
1834 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1835 cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1836 if ((cm_node->listener == listener) && !cm_node->accelerated) {
1837 atomic_inc(&cm_node->ref_count);
1838 list_add(&cm_node->reset_entry, &reset_list);
1839 }
1840 }
1841 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1842 }
1843
1844 list_for_each_safe(list_pos, list_temp, &reset_list) {
1845 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1846 loopback = cm_node->loopbackpartner;
1847 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1848 i40iw_rem_ref_cm_node(cm_node);
1849 } else {
1850 if (!loopback) {
1851 i40iw_cleanup_retrans_entry(cm_node);
1852 err = i40iw_send_reset(cm_node);
1853 if (err) {
1854 cm_node->state = I40IW_CM_STATE_CLOSED;
1855 i40iw_pr_err("send reset\n");
1856 } else {
1857 old_state = cm_node->state;
1858 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1859 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1860 i40iw_rem_ref_cm_node(cm_node);
1861 }
1862 } else {
1863 struct i40iw_cm_event event;
1864
1865 event.cm_node = loopback;
1866 memcpy(event.cm_info.rem_addr,
1867 loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1868 memcpy(event.cm_info.loc_addr,
1869 loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1870 event.cm_info.rem_port = loopback->rem_port;
1871 event.cm_info.loc_port = loopback->loc_port;
1872 event.cm_info.cm_id = loopback->cm_id;
1873 event.cm_info.ipv4 = loopback->ipv4;
1874 atomic_inc(&loopback->ref_count);
1875 loopback->state = I40IW_CM_STATE_CLOSED;
1876 i40iw_event_connect_error(&event);
1877 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1878 i40iw_rem_ref_cm_node(cm_node);
1879 }
1880 }
1881 }
1882
1883 if (!atomic_dec_return(&listener->ref_count)) {
1884 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1885 list_del(&listener->list);
1886 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1887
1888 if (listener->iwdev) {
1889 if (apbvt_del && !i40iw_port_in_use(cm_core, listener->loc_port, false))
1890 i40iw_manage_apbvt(listener->iwdev,
1891 listener->loc_port,
1892 I40IW_MANAGE_APBVT_DEL);
1893
1894 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1895 nfo.loc_port = listener->loc_port;
1896 nfo.ipv4 = listener->ipv4;
1897 nfo.vlan_id = listener->vlan_id;
1898 nfo.user_pri = listener->user_pri;
1899
1900 if (!list_empty(&listener->child_listen_list)) {
1901 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1902 } else {
1903 if (listener->qhash_set)
1904 i40iw_manage_qhash(listener->iwdev,
1905 &nfo,
1906 I40IW_QHASH_TYPE_TCP_SYN,
1907 I40IW_QHASH_MANAGE_TYPE_DELETE,
1908 NULL,
1909 false);
1910 }
1911 }
1912
1913 cm_core->stats_listen_destroyed++;
1914 kfree(listener);
1915 cm_core->stats_listen_nodes_destroyed++;
1916 listener = NULL;
1917 ret = 0;
1918 }
1919
1920 if (listener) {
1921 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1922 i40iw_debug(cm_core->dev,
1923 I40IW_DEBUG_CM,
1924 "%s: listener (%p) pending accepts=%u\n",
1925 __func__,
1926 listener,
1927 atomic_read(&listener->pend_accepts_cnt));
1928 }
1929
1930 return ret;
1931 }
1932
1933 /**
1934 * i40iw_cm_del_listen - delete a linstener
1935 * @cm_core: cm's core
1936 * @listener: passive connection's listener
1937 * @apbvt_del: flag to delete apbvt
1938 */
1939 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1940 struct i40iw_cm_listener *listener,
1941 bool apbvt_del)
1942 {
1943 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1944 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1945 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1946 }
1947
1948 /**
1949 * i40iw_addr_resolve_neigh - resolve neighbor address
1950 * @iwdev: iwarp device structure
1951 * @src_ip: local ip address
1952 * @dst_ip: remote ip address
1953 * @arpindex: if there is an arp entry
1954 */
1955 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1956 u32 src_ip,
1957 u32 dst_ip,
1958 int arpindex)
1959 {
1960 struct rtable *rt;
1961 struct neighbour *neigh;
1962 int rc = arpindex;
1963 struct net_device *netdev = iwdev->netdev;
1964 __be32 dst_ipaddr = htonl(dst_ip);
1965 __be32 src_ipaddr = htonl(src_ip);
1966
1967 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1968 if (IS_ERR(rt)) {
1969 i40iw_pr_err("ip_route_output\n");
1970 return rc;
1971 }
1972
1973 if (netif_is_bond_slave(netdev))
1974 netdev = netdev_master_upper_dev_get(netdev);
1975
1976 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1977
1978 rcu_read_lock();
1979 if (neigh) {
1980 if (neigh->nud_state & NUD_VALID) {
1981 if (arpindex >= 0) {
1982 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1983 neigh->ha))
1984 /* Mac address same as arp table */
1985 goto resolve_neigh_exit;
1986 i40iw_manage_arp_cache(iwdev,
1987 iwdev->arp_table[arpindex].mac_addr,
1988 &dst_ip,
1989 true,
1990 I40IW_ARP_DELETE);
1991 }
1992
1993 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1994 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1995 } else {
1996 neigh_event_send(neigh, NULL);
1997 }
1998 }
1999 resolve_neigh_exit:
2000
2001 rcu_read_unlock();
2002 if (neigh)
2003 neigh_release(neigh);
2004
2005 ip_rt_put(rt);
2006 return rc;
2007 }
2008
2009 /**
2010 * i40iw_get_dst_ipv6
2011 */
2012 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2013 struct sockaddr_in6 *dst_addr)
2014 {
2015 struct dst_entry *dst;
2016 struct flowi6 fl6;
2017
2018 memset(&fl6, 0, sizeof(fl6));
2019 fl6.daddr = dst_addr->sin6_addr;
2020 fl6.saddr = src_addr->sin6_addr;
2021 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2022 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2023
2024 dst = ip6_route_output(&init_net, NULL, &fl6);
2025 return dst;
2026 }
2027
2028 /**
2029 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2030 * @iwdev: iwarp device structure
2031 * @dst_ip: remote ip address
2032 * @arpindex: if there is an arp entry
2033 */
2034 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2035 u32 *src,
2036 u32 *dest,
2037 int arpindex)
2038 {
2039 struct neighbour *neigh;
2040 int rc = arpindex;
2041 struct net_device *netdev = iwdev->netdev;
2042 struct dst_entry *dst;
2043 struct sockaddr_in6 dst_addr;
2044 struct sockaddr_in6 src_addr;
2045
2046 memset(&dst_addr, 0, sizeof(dst_addr));
2047 dst_addr.sin6_family = AF_INET6;
2048 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2049 memset(&src_addr, 0, sizeof(src_addr));
2050 src_addr.sin6_family = AF_INET6;
2051 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2052 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2053 if (!dst || dst->error) {
2054 if (dst) {
2055 dst_release(dst);
2056 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2057 dst->error);
2058 }
2059 return rc;
2060 }
2061
2062 if (netif_is_bond_slave(netdev))
2063 netdev = netdev_master_upper_dev_get(netdev);
2064
2065 neigh = dst_neigh_lookup(dst, &dst_addr);
2066
2067 rcu_read_lock();
2068 if (neigh) {
2069 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2070 if (neigh->nud_state & NUD_VALID) {
2071 if (arpindex >= 0) {
2072 if (ether_addr_equal
2073 (iwdev->arp_table[arpindex].mac_addr,
2074 neigh->ha)) {
2075 /* Mac address same as in arp table */
2076 goto resolve_neigh_exit6;
2077 }
2078 i40iw_manage_arp_cache(iwdev,
2079 iwdev->arp_table[arpindex].mac_addr,
2080 dest,
2081 false,
2082 I40IW_ARP_DELETE);
2083 }
2084 i40iw_manage_arp_cache(iwdev,
2085 neigh->ha,
2086 dest,
2087 false,
2088 I40IW_ARP_ADD);
2089 rc = i40iw_arp_table(iwdev,
2090 dest,
2091 false,
2092 NULL,
2093 I40IW_ARP_RESOLVE);
2094 } else {
2095 neigh_event_send(neigh, NULL);
2096 }
2097 }
2098
2099 resolve_neigh_exit6:
2100 rcu_read_unlock();
2101 if (neigh)
2102 neigh_release(neigh);
2103 dst_release(dst);
2104 return rc;
2105 }
2106
2107 /**
2108 * i40iw_ipv4_is_loopback - check if loopback
2109 * @loc_addr: local addr to compare
2110 * @rem_addr: remote address
2111 */
2112 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2113 {
2114 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2115 }
2116
2117 /**
2118 * i40iw_ipv6_is_loopback - check if loopback
2119 * @loc_addr: local addr to compare
2120 * @rem_addr: remote address
2121 */
2122 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2123 {
2124 struct in6_addr raddr6;
2125
2126 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2127 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2128 }
2129
2130 /**
2131 * i40iw_make_cm_node - create a new instance of a cm node
2132 * @cm_core: cm's core
2133 * @iwdev: iwarp device structure
2134 * @cm_info: quad info for connection
2135 * @listener: passive connection's listener
2136 */
2137 static struct i40iw_cm_node *i40iw_make_cm_node(
2138 struct i40iw_cm_core *cm_core,
2139 struct i40iw_device *iwdev,
2140 struct i40iw_cm_info *cm_info,
2141 struct i40iw_cm_listener *listener)
2142 {
2143 struct i40iw_cm_node *cm_node;
2144 struct timespec ts;
2145 int oldarpindex;
2146 int arpindex;
2147 struct net_device *netdev = iwdev->netdev;
2148
2149 /* create an hte and cm_node for this instance */
2150 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2151 if (!cm_node)
2152 return NULL;
2153
2154 /* set our node specific transport info */
2155 cm_node->ipv4 = cm_info->ipv4;
2156 cm_node->vlan_id = cm_info->vlan_id;
2157 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2158 cm_node->vlan_id = 0;
2159 cm_node->tos = cm_info->tos;
2160 cm_node->user_pri = cm_info->user_pri;
2161 if (listener) {
2162 if (listener->tos != cm_info->tos)
2163 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2164 "application TOS[%d] and remote client TOS[%d] mismatch\n",
2165 listener->tos, cm_info->tos);
2166 cm_node->tos = max(listener->tos, cm_info->tos);
2167 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2168 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2169 cm_node->tos, cm_node->user_pri);
2170 }
2171 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2172 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2173 cm_node->loc_port = cm_info->loc_port;
2174 cm_node->rem_port = cm_info->rem_port;
2175
2176 cm_node->mpa_frame_rev = iwdev->mpa_version;
2177 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2178 cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2179 cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2180
2181 cm_node->listener = listener;
2182 cm_node->cm_id = cm_info->cm_id;
2183 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2184 spin_lock_init(&cm_node->retrans_list_lock);
2185 cm_node->ack_rcvd = false;
2186
2187 atomic_set(&cm_node->ref_count, 1);
2188 /* associate our parent CM core */
2189 cm_node->cm_core = cm_core;
2190 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2191 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2192 cm_node->tcp_cntxt.rcv_wnd =
2193 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2194 ts = current_kernel_time();
2195 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2196 cm_node->tcp_cntxt.mss = (cm_node->ipv4) ? (iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4) :
2197 (iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6);
2198
2199 cm_node->iwdev = iwdev;
2200 cm_node->dev = &iwdev->sc_dev;
2201
2202 if ((cm_node->ipv4 &&
2203 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2204 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2205 cm_node->rem_addr))) {
2206 arpindex = i40iw_arp_table(iwdev,
2207 cm_node->rem_addr,
2208 false,
2209 NULL,
2210 I40IW_ARP_RESOLVE);
2211 } else {
2212 oldarpindex = i40iw_arp_table(iwdev,
2213 cm_node->rem_addr,
2214 false,
2215 NULL,
2216 I40IW_ARP_RESOLVE);
2217 if (cm_node->ipv4)
2218 arpindex = i40iw_addr_resolve_neigh(iwdev,
2219 cm_info->loc_addr[0],
2220 cm_info->rem_addr[0],
2221 oldarpindex);
2222 else if (IS_ENABLED(CONFIG_IPV6))
2223 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2224 cm_info->loc_addr,
2225 cm_info->rem_addr,
2226 oldarpindex);
2227 else
2228 arpindex = -EINVAL;
2229 }
2230 if (arpindex < 0) {
2231 i40iw_pr_err("cm_node arpindex\n");
2232 kfree(cm_node);
2233 return NULL;
2234 }
2235 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2236 i40iw_add_hte_node(cm_core, cm_node);
2237 cm_core->stats_nodes_created++;
2238 return cm_node;
2239 }
2240
2241 /**
2242 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2243 * @cm_node: connection's node
2244 */
2245 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2246 {
2247 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2248 struct i40iw_qp *iwqp;
2249 struct i40iw_cm_info nfo;
2250 unsigned long flags;
2251
2252 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2253 if (atomic_dec_return(&cm_node->ref_count)) {
2254 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2255 return;
2256 }
2257 list_del(&cm_node->list);
2258 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2259
2260 /* if the node is destroyed before connection was accelerated */
2261 if (!cm_node->accelerated && cm_node->accept_pend) {
2262 pr_err("node destroyed before established\n");
2263 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2264 }
2265 if (cm_node->close_entry)
2266 i40iw_handle_close_entry(cm_node, 0);
2267 if (cm_node->listener) {
2268 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2269 } else {
2270 if (!i40iw_port_in_use(cm_core, cm_node->loc_port, true) && cm_node->apbvt_set) {
2271 i40iw_manage_apbvt(cm_node->iwdev,
2272 cm_node->loc_port,
2273 I40IW_MANAGE_APBVT_DEL);
2274 cm_node->apbvt_set = 0;
2275 }
2276 i40iw_get_addr_info(cm_node, &nfo);
2277 if (cm_node->qhash_set) {
2278 i40iw_manage_qhash(cm_node->iwdev,
2279 &nfo,
2280 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2281 I40IW_QHASH_MANAGE_TYPE_DELETE,
2282 NULL,
2283 false);
2284 cm_node->qhash_set = 0;
2285 }
2286 }
2287
2288 iwqp = cm_node->iwqp;
2289 if (iwqp) {
2290 iwqp->cm_node = NULL;
2291 i40iw_rem_ref(&iwqp->ibqp);
2292 cm_node->iwqp = NULL;
2293 } else if (cm_node->qhash_set) {
2294 i40iw_get_addr_info(cm_node, &nfo);
2295 i40iw_manage_qhash(cm_node->iwdev,
2296 &nfo,
2297 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2298 I40IW_QHASH_MANAGE_TYPE_DELETE,
2299 NULL,
2300 false);
2301 cm_node->qhash_set = 0;
2302 }
2303
2304 cm_node->cm_core->stats_nodes_destroyed++;
2305 kfree(cm_node);
2306 }
2307
2308 /**
2309 * i40iw_handle_fin_pkt - FIN packet received
2310 * @cm_node: connection's node
2311 */
2312 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2313 {
2314 u32 ret;
2315
2316 switch (cm_node->state) {
2317 case I40IW_CM_STATE_SYN_RCVD:
2318 case I40IW_CM_STATE_SYN_SENT:
2319 case I40IW_CM_STATE_ESTABLISHED:
2320 case I40IW_CM_STATE_MPAREJ_RCVD:
2321 cm_node->tcp_cntxt.rcv_nxt++;
2322 i40iw_cleanup_retrans_entry(cm_node);
2323 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2324 i40iw_send_fin(cm_node);
2325 break;
2326 case I40IW_CM_STATE_MPAREQ_SENT:
2327 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2328 cm_node->tcp_cntxt.rcv_nxt++;
2329 i40iw_cleanup_retrans_entry(cm_node);
2330 cm_node->state = I40IW_CM_STATE_CLOSED;
2331 atomic_inc(&cm_node->ref_count);
2332 i40iw_send_reset(cm_node);
2333 break;
2334 case I40IW_CM_STATE_FIN_WAIT1:
2335 cm_node->tcp_cntxt.rcv_nxt++;
2336 i40iw_cleanup_retrans_entry(cm_node);
2337 cm_node->state = I40IW_CM_STATE_CLOSING;
2338 i40iw_send_ack(cm_node);
2339 /*
2340 * Wait for ACK as this is simultaneous close.
2341 * After we receive ACK, do not send anything.
2342 * Just rm the node.
2343 */
2344 break;
2345 case I40IW_CM_STATE_FIN_WAIT2:
2346 cm_node->tcp_cntxt.rcv_nxt++;
2347 i40iw_cleanup_retrans_entry(cm_node);
2348 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2349 i40iw_send_ack(cm_node);
2350 ret =
2351 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2352 if (ret)
2353 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2354 break;
2355 case I40IW_CM_STATE_TIME_WAIT:
2356 cm_node->tcp_cntxt.rcv_nxt++;
2357 i40iw_cleanup_retrans_entry(cm_node);
2358 cm_node->state = I40IW_CM_STATE_CLOSED;
2359 i40iw_rem_ref_cm_node(cm_node);
2360 break;
2361 case I40IW_CM_STATE_OFFLOADED:
2362 default:
2363 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2364 break;
2365 }
2366 }
2367
2368 /**
2369 * i40iw_handle_rst_pkt - process received RST packet
2370 * @cm_node: connection's node
2371 * @rbuf: receive buffer
2372 */
2373 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2374 struct i40iw_puda_buf *rbuf)
2375 {
2376 i40iw_cleanup_retrans_entry(cm_node);
2377 switch (cm_node->state) {
2378 case I40IW_CM_STATE_SYN_SENT:
2379 case I40IW_CM_STATE_MPAREQ_SENT:
2380 switch (cm_node->mpa_frame_rev) {
2381 case IETF_MPA_V2:
2382 cm_node->mpa_frame_rev = IETF_MPA_V1;
2383 /* send a syn and goto syn sent state */
2384 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2385 if (i40iw_send_syn(cm_node, 0))
2386 i40iw_active_open_err(cm_node, false);
2387 break;
2388 case IETF_MPA_V1:
2389 default:
2390 i40iw_active_open_err(cm_node, false);
2391 break;
2392 }
2393 break;
2394 case I40IW_CM_STATE_MPAREQ_RCVD:
2395 atomic_add_return(1, &cm_node->passive_state);
2396 break;
2397 case I40IW_CM_STATE_ESTABLISHED:
2398 case I40IW_CM_STATE_SYN_RCVD:
2399 case I40IW_CM_STATE_LISTENING:
2400 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2401 i40iw_passive_open_err(cm_node, false);
2402 break;
2403 case I40IW_CM_STATE_OFFLOADED:
2404 i40iw_active_open_err(cm_node, false);
2405 break;
2406 case I40IW_CM_STATE_CLOSED:
2407 break;
2408 case I40IW_CM_STATE_FIN_WAIT2:
2409 case I40IW_CM_STATE_FIN_WAIT1:
2410 case I40IW_CM_STATE_LAST_ACK:
2411 cm_node->cm_id->rem_ref(cm_node->cm_id);
2412 /* fall through */
2413 case I40IW_CM_STATE_TIME_WAIT:
2414 cm_node->state = I40IW_CM_STATE_CLOSED;
2415 i40iw_rem_ref_cm_node(cm_node);
2416 break;
2417 default:
2418 break;
2419 }
2420 }
2421
2422 /**
2423 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2424 * @cm_node: connection's node
2425 * @rbuf: receive buffer
2426 */
2427 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2428 struct i40iw_puda_buf *rbuf)
2429 {
2430 int ret;
2431 int datasize = rbuf->datalen;
2432 u8 *dataloc = rbuf->data;
2433
2434 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2435 u32 res_type;
2436
2437 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2438 if (ret) {
2439 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2440 i40iw_active_open_err(cm_node, true);
2441 else
2442 i40iw_passive_open_err(cm_node, true);
2443 return;
2444 }
2445
2446 switch (cm_node->state) {
2447 case I40IW_CM_STATE_ESTABLISHED:
2448 if (res_type == I40IW_MPA_REQUEST_REJECT)
2449 i40iw_pr_err("state for reject\n");
2450 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2451 type = I40IW_CM_EVENT_MPA_REQ;
2452 i40iw_send_ack(cm_node); /* ACK received MPA request */
2453 atomic_set(&cm_node->passive_state,
2454 I40IW_PASSIVE_STATE_INDICATED);
2455 break;
2456 case I40IW_CM_STATE_MPAREQ_SENT:
2457 i40iw_cleanup_retrans_entry(cm_node);
2458 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2459 type = I40IW_CM_EVENT_MPA_REJECT;
2460 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2461 } else {
2462 type = I40IW_CM_EVENT_CONNECTED;
2463 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2464 }
2465 i40iw_send_ack(cm_node);
2466 break;
2467 default:
2468 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2469 break;
2470 }
2471 i40iw_create_event(cm_node, type);
2472 }
2473
2474 /**
2475 * i40iw_indicate_pkt_err - Send up err event to cm
2476 * @cm_node: connection's node
2477 */
2478 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2479 {
2480 switch (cm_node->state) {
2481 case I40IW_CM_STATE_SYN_SENT:
2482 case I40IW_CM_STATE_MPAREQ_SENT:
2483 i40iw_active_open_err(cm_node, true);
2484 break;
2485 case I40IW_CM_STATE_ESTABLISHED:
2486 case I40IW_CM_STATE_SYN_RCVD:
2487 i40iw_passive_open_err(cm_node, true);
2488 break;
2489 case I40IW_CM_STATE_OFFLOADED:
2490 default:
2491 break;
2492 }
2493 }
2494
2495 /**
2496 * i40iw_check_syn - Check for error on received syn ack
2497 * @cm_node: connection's node
2498 * @tcph: pointer tcp header
2499 */
2500 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2501 {
2502 int err = 0;
2503
2504 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2505 err = 1;
2506 i40iw_active_open_err(cm_node, true);
2507 }
2508 return err;
2509 }
2510
2511 /**
2512 * i40iw_check_seq - check seq numbers if OK
2513 * @cm_node: connection's node
2514 * @tcph: pointer tcp header
2515 */
2516 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2517 {
2518 int err = 0;
2519 u32 seq;
2520 u32 ack_seq;
2521 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2522 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2523 u32 rcv_wnd;
2524
2525 seq = ntohl(tcph->seq);
2526 ack_seq = ntohl(tcph->ack_seq);
2527 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2528 if (ack_seq != loc_seq_num)
2529 err = -1;
2530 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2531 err = -1;
2532 if (err) {
2533 i40iw_pr_err("seq number\n");
2534 i40iw_indicate_pkt_err(cm_node);
2535 }
2536 return err;
2537 }
2538
2539 /**
2540 * i40iw_handle_syn_pkt - is for Passive node
2541 * @cm_node: connection's node
2542 * @rbuf: receive buffer
2543 */
2544 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2545 struct i40iw_puda_buf *rbuf)
2546 {
2547 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2548 int ret;
2549 u32 inc_sequence;
2550 int optionsize;
2551 struct i40iw_cm_info nfo;
2552
2553 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2554 inc_sequence = ntohl(tcph->seq);
2555
2556 switch (cm_node->state) {
2557 case I40IW_CM_STATE_SYN_SENT:
2558 case I40IW_CM_STATE_MPAREQ_SENT:
2559 /* Rcvd syn on active open connection */
2560 i40iw_active_open_err(cm_node, 1);
2561 break;
2562 case I40IW_CM_STATE_LISTENING:
2563 /* Passive OPEN */
2564 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2565 cm_node->listener->backlog) {
2566 cm_node->cm_core->stats_backlog_drops++;
2567 i40iw_passive_open_err(cm_node, false);
2568 break;
2569 }
2570 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2571 if (ret) {
2572 i40iw_passive_open_err(cm_node, false);
2573 /* drop pkt */
2574 break;
2575 }
2576 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2577 cm_node->accept_pend = 1;
2578 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2579
2580 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2581 i40iw_get_addr_info(cm_node, &nfo);
2582 ret = i40iw_manage_qhash(cm_node->iwdev,
2583 &nfo,
2584 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2585 I40IW_QHASH_MANAGE_TYPE_ADD,
2586 (void *)cm_node,
2587 false);
2588 cm_node->qhash_set = true;
2589 break;
2590 case I40IW_CM_STATE_CLOSED:
2591 i40iw_cleanup_retrans_entry(cm_node);
2592 atomic_inc(&cm_node->ref_count);
2593 i40iw_send_reset(cm_node);
2594 break;
2595 case I40IW_CM_STATE_OFFLOADED:
2596 case I40IW_CM_STATE_ESTABLISHED:
2597 case I40IW_CM_STATE_FIN_WAIT1:
2598 case I40IW_CM_STATE_FIN_WAIT2:
2599 case I40IW_CM_STATE_MPAREQ_RCVD:
2600 case I40IW_CM_STATE_LAST_ACK:
2601 case I40IW_CM_STATE_CLOSING:
2602 case I40IW_CM_STATE_UNKNOWN:
2603 default:
2604 break;
2605 }
2606 }
2607
2608 /**
2609 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2610 * @cm_node: connection's node
2611 * @rbuf: receive buffer
2612 */
2613 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2614 struct i40iw_puda_buf *rbuf)
2615 {
2616 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2617 int ret;
2618 u32 inc_sequence;
2619 int optionsize;
2620
2621 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2622 inc_sequence = ntohl(tcph->seq);
2623 switch (cm_node->state) {
2624 case I40IW_CM_STATE_SYN_SENT:
2625 i40iw_cleanup_retrans_entry(cm_node);
2626 /* active open */
2627 if (i40iw_check_syn(cm_node, tcph)) {
2628 i40iw_pr_err("check syn fail\n");
2629 return;
2630 }
2631 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2632 /* setup options */
2633 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2634 if (ret) {
2635 i40iw_debug(cm_node->dev,
2636 I40IW_DEBUG_CM,
2637 "cm_node=%p tcp_options failed\n",
2638 cm_node);
2639 break;
2640 }
2641 i40iw_cleanup_retrans_entry(cm_node);
2642 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2643 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2644 ret = i40iw_send_mpa_request(cm_node);
2645 if (ret) {
2646 i40iw_debug(cm_node->dev,
2647 I40IW_DEBUG_CM,
2648 "cm_node=%p i40iw_send_mpa_request failed\n",
2649 cm_node);
2650 break;
2651 }
2652 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2653 break;
2654 case I40IW_CM_STATE_MPAREQ_RCVD:
2655 i40iw_passive_open_err(cm_node, true);
2656 break;
2657 case I40IW_CM_STATE_LISTENING:
2658 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2659 i40iw_cleanup_retrans_entry(cm_node);
2660 cm_node->state = I40IW_CM_STATE_CLOSED;
2661 i40iw_send_reset(cm_node);
2662 break;
2663 case I40IW_CM_STATE_CLOSED:
2664 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2665 i40iw_cleanup_retrans_entry(cm_node);
2666 atomic_inc(&cm_node->ref_count);
2667 i40iw_send_reset(cm_node);
2668 break;
2669 case I40IW_CM_STATE_ESTABLISHED:
2670 case I40IW_CM_STATE_FIN_WAIT1:
2671 case I40IW_CM_STATE_FIN_WAIT2:
2672 case I40IW_CM_STATE_LAST_ACK:
2673 case I40IW_CM_STATE_OFFLOADED:
2674 case I40IW_CM_STATE_CLOSING:
2675 case I40IW_CM_STATE_UNKNOWN:
2676 case I40IW_CM_STATE_MPAREQ_SENT:
2677 default:
2678 break;
2679 }
2680 }
2681
2682 /**
2683 * i40iw_handle_ack_pkt - process packet with ACK
2684 * @cm_node: connection's node
2685 * @rbuf: receive buffer
2686 */
2687 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2688 struct i40iw_puda_buf *rbuf)
2689 {
2690 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2691 u32 inc_sequence;
2692 int ret = 0;
2693 int optionsize;
2694 u32 datasize = rbuf->datalen;
2695
2696 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2697
2698 if (i40iw_check_seq(cm_node, tcph))
2699 return -EINVAL;
2700
2701 inc_sequence = ntohl(tcph->seq);
2702 switch (cm_node->state) {
2703 case I40IW_CM_STATE_SYN_RCVD:
2704 i40iw_cleanup_retrans_entry(cm_node);
2705 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2706 if (ret)
2707 break;
2708 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2709 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2710 if (datasize) {
2711 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2712 i40iw_handle_rcv_mpa(cm_node, rbuf);
2713 }
2714 break;
2715 case I40IW_CM_STATE_ESTABLISHED:
2716 i40iw_cleanup_retrans_entry(cm_node);
2717 if (datasize) {
2718 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2719 i40iw_handle_rcv_mpa(cm_node, rbuf);
2720 }
2721 break;
2722 case I40IW_CM_STATE_MPAREQ_SENT:
2723 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2724 if (datasize) {
2725 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2726 cm_node->ack_rcvd = false;
2727 i40iw_handle_rcv_mpa(cm_node, rbuf);
2728 } else {
2729 cm_node->ack_rcvd = true;
2730 }
2731 break;
2732 case I40IW_CM_STATE_LISTENING:
2733 i40iw_cleanup_retrans_entry(cm_node);
2734 cm_node->state = I40IW_CM_STATE_CLOSED;
2735 i40iw_send_reset(cm_node);
2736 break;
2737 case I40IW_CM_STATE_CLOSED:
2738 i40iw_cleanup_retrans_entry(cm_node);
2739 atomic_inc(&cm_node->ref_count);
2740 i40iw_send_reset(cm_node);
2741 break;
2742 case I40IW_CM_STATE_LAST_ACK:
2743 case I40IW_CM_STATE_CLOSING:
2744 i40iw_cleanup_retrans_entry(cm_node);
2745 cm_node->state = I40IW_CM_STATE_CLOSED;
2746 if (!cm_node->accept_pend)
2747 cm_node->cm_id->rem_ref(cm_node->cm_id);
2748 i40iw_rem_ref_cm_node(cm_node);
2749 break;
2750 case I40IW_CM_STATE_FIN_WAIT1:
2751 i40iw_cleanup_retrans_entry(cm_node);
2752 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2753 break;
2754 case I40IW_CM_STATE_SYN_SENT:
2755 case I40IW_CM_STATE_FIN_WAIT2:
2756 case I40IW_CM_STATE_OFFLOADED:
2757 case I40IW_CM_STATE_MPAREQ_RCVD:
2758 case I40IW_CM_STATE_UNKNOWN:
2759 default:
2760 i40iw_cleanup_retrans_entry(cm_node);
2761 break;
2762 }
2763 return ret;
2764 }
2765
2766 /**
2767 * i40iw_process_packet - process cm packet
2768 * @cm_node: connection's node
2769 * @rbuf: receive buffer
2770 */
2771 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2772 struct i40iw_puda_buf *rbuf)
2773 {
2774 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2775 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2776 u32 fin_set = 0;
2777 int ret;
2778
2779 if (tcph->rst) {
2780 pkt_type = I40IW_PKT_TYPE_RST;
2781 } else if (tcph->syn) {
2782 pkt_type = I40IW_PKT_TYPE_SYN;
2783 if (tcph->ack)
2784 pkt_type = I40IW_PKT_TYPE_SYNACK;
2785 } else if (tcph->ack) {
2786 pkt_type = I40IW_PKT_TYPE_ACK;
2787 }
2788 if (tcph->fin)
2789 fin_set = 1;
2790
2791 switch (pkt_type) {
2792 case I40IW_PKT_TYPE_SYN:
2793 i40iw_handle_syn_pkt(cm_node, rbuf);
2794 break;
2795 case I40IW_PKT_TYPE_SYNACK:
2796 i40iw_handle_synack_pkt(cm_node, rbuf);
2797 break;
2798 case I40IW_PKT_TYPE_ACK:
2799 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2800 if (fin_set && !ret)
2801 i40iw_handle_fin_pkt(cm_node);
2802 break;
2803 case I40IW_PKT_TYPE_RST:
2804 i40iw_handle_rst_pkt(cm_node, rbuf);
2805 break;
2806 default:
2807 if (fin_set &&
2808 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2809 i40iw_handle_fin_pkt(cm_node);
2810 break;
2811 }
2812 }
2813
2814 /**
2815 * i40iw_make_listen_node - create a listen node with params
2816 * @cm_core: cm's core
2817 * @iwdev: iwarp device structure
2818 * @cm_info: quad info for connection
2819 */
2820 static struct i40iw_cm_listener *i40iw_make_listen_node(
2821 struct i40iw_cm_core *cm_core,
2822 struct i40iw_device *iwdev,
2823 struct i40iw_cm_info *cm_info)
2824 {
2825 struct i40iw_cm_listener *listener;
2826 unsigned long flags;
2827
2828 /* cannot have multiple matching listeners */
2829 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2830 cm_info->loc_port,
2831 cm_info->vlan_id,
2832 I40IW_CM_LISTENER_EITHER_STATE);
2833 if (listener &&
2834 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2835 atomic_dec(&listener->ref_count);
2836 i40iw_debug(cm_core->dev,
2837 I40IW_DEBUG_CM,
2838 "Not creating listener since it already exists\n");
2839 return NULL;
2840 }
2841
2842 if (!listener) {
2843 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2844 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2845 if (!listener)
2846 return NULL;
2847 cm_core->stats_listen_nodes_created++;
2848 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2849 listener->loc_port = cm_info->loc_port;
2850
2851 INIT_LIST_HEAD(&listener->child_listen_list);
2852
2853 atomic_set(&listener->ref_count, 1);
2854 } else {
2855 listener->reused_node = 1;
2856 }
2857
2858 listener->cm_id = cm_info->cm_id;
2859 listener->ipv4 = cm_info->ipv4;
2860 listener->vlan_id = cm_info->vlan_id;
2861 atomic_set(&listener->pend_accepts_cnt, 0);
2862 listener->cm_core = cm_core;
2863 listener->iwdev = iwdev;
2864
2865 listener->backlog = cm_info->backlog;
2866 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2867
2868 if (!listener->reused_node) {
2869 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2870 list_add(&listener->list, &cm_core->listen_nodes);
2871 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2872 }
2873
2874 return listener;
2875 }
2876
2877 /**
2878 * i40iw_create_cm_node - make a connection node with params
2879 * @cm_core: cm's core
2880 * @iwdev: iwarp device structure
2881 * @private_data_len: len to provate data for mpa request
2882 * @private_data: pointer to private data for connection
2883 * @cm_info: quad info for connection
2884 */
2885 static struct i40iw_cm_node *i40iw_create_cm_node(
2886 struct i40iw_cm_core *cm_core,
2887 struct i40iw_device *iwdev,
2888 u16 private_data_len,
2889 void *private_data,
2890 struct i40iw_cm_info *cm_info)
2891 {
2892 struct i40iw_cm_node *cm_node;
2893 struct i40iw_cm_listener *loopback_remotelistener;
2894 struct i40iw_cm_node *loopback_remotenode;
2895 struct i40iw_cm_info loopback_cm_info;
2896
2897 /* create a CM connection node */
2898 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2899 if (!cm_node)
2900 return ERR_PTR(-ENOMEM);
2901 /* set our node side to client (active) side */
2902 cm_node->tcp_cntxt.client = 1;
2903 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2904
2905 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2906 loopback_remotelistener = i40iw_find_listener(
2907 cm_core,
2908 cm_info->rem_addr,
2909 cm_node->rem_port,
2910 cm_node->vlan_id,
2911 I40IW_CM_LISTENER_ACTIVE_STATE);
2912 if (!loopback_remotelistener) {
2913 i40iw_rem_ref_cm_node(cm_node);
2914 return ERR_PTR(-ECONNREFUSED);
2915 } else {
2916 loopback_cm_info = *cm_info;
2917 loopback_cm_info.loc_port = cm_info->rem_port;
2918 loopback_cm_info.rem_port = cm_info->loc_port;
2919 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2920 loopback_cm_info.ipv4 = cm_info->ipv4;
2921 loopback_remotenode = i40iw_make_cm_node(cm_core,
2922 iwdev,
2923 &loopback_cm_info,
2924 loopback_remotelistener);
2925 if (!loopback_remotenode) {
2926 i40iw_rem_ref_cm_node(cm_node);
2927 return ERR_PTR(-ENOMEM);
2928 }
2929 cm_core->stats_loopbacks++;
2930 loopback_remotenode->loopbackpartner = cm_node;
2931 loopback_remotenode->tcp_cntxt.rcv_wscale =
2932 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2933 cm_node->loopbackpartner = loopback_remotenode;
2934 memcpy(loopback_remotenode->pdata_buf, private_data,
2935 private_data_len);
2936 loopback_remotenode->pdata.size = private_data_len;
2937
2938 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2939 cm_node->tcp_cntxt.rcv_nxt =
2940 loopback_remotenode->tcp_cntxt.loc_seq_num;
2941 loopback_remotenode->tcp_cntxt.rcv_nxt =
2942 cm_node->tcp_cntxt.loc_seq_num;
2943 cm_node->tcp_cntxt.max_snd_wnd =
2944 loopback_remotenode->tcp_cntxt.rcv_wnd;
2945 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2946 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2947 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2948 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2949 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2950 }
2951 return cm_node;
2952 }
2953
2954 cm_node->pdata.size = private_data_len;
2955 cm_node->pdata.addr = cm_node->pdata_buf;
2956
2957 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2958
2959 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2960 return cm_node;
2961 }
2962
2963 /**
2964 * i40iw_cm_reject - reject and teardown a connection
2965 * @cm_node: connection's node
2966 * @pdate: ptr to private data for reject
2967 * @plen: size of private data
2968 */
2969 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2970 {
2971 int ret = 0;
2972 int err;
2973 int passive_state;
2974 struct iw_cm_id *cm_id = cm_node->cm_id;
2975 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2976
2977 if (cm_node->tcp_cntxt.client)
2978 return ret;
2979 i40iw_cleanup_retrans_entry(cm_node);
2980
2981 if (!loopback) {
2982 passive_state = atomic_add_return(1, &cm_node->passive_state);
2983 if (passive_state == I40IW_SEND_RESET_EVENT) {
2984 cm_node->state = I40IW_CM_STATE_CLOSED;
2985 i40iw_rem_ref_cm_node(cm_node);
2986 } else {
2987 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2988 i40iw_rem_ref_cm_node(cm_node);
2989 } else {
2990 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2991 if (ret) {
2992 cm_node->state = I40IW_CM_STATE_CLOSED;
2993 err = i40iw_send_reset(cm_node);
2994 if (err)
2995 i40iw_pr_err("send reset failed\n");
2996 } else {
2997 cm_id->add_ref(cm_id);
2998 }
2999 }
3000 }
3001 } else {
3002 cm_node->cm_id = NULL;
3003 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3004 i40iw_rem_ref_cm_node(cm_node);
3005 i40iw_rem_ref_cm_node(loopback);
3006 } else {
3007 ret = i40iw_send_cm_event(loopback,
3008 loopback->cm_id,
3009 IW_CM_EVENT_CONNECT_REPLY,
3010 -ECONNREFUSED);
3011 i40iw_rem_ref_cm_node(cm_node);
3012 loopback->state = I40IW_CM_STATE_CLOSING;
3013
3014 cm_id = loopback->cm_id;
3015 i40iw_rem_ref_cm_node(loopback);
3016 cm_id->rem_ref(cm_id);
3017 }
3018 }
3019
3020 return ret;
3021 }
3022
3023 /**
3024 * i40iw_cm_close - close of cm connection
3025 * @cm_node: connection's node
3026 */
3027 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3028 {
3029 int ret = 0;
3030
3031 if (!cm_node)
3032 return -EINVAL;
3033
3034 switch (cm_node->state) {
3035 case I40IW_CM_STATE_SYN_RCVD:
3036 case I40IW_CM_STATE_SYN_SENT:
3037 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3038 case I40IW_CM_STATE_ESTABLISHED:
3039 case I40IW_CM_STATE_ACCEPTING:
3040 case I40IW_CM_STATE_MPAREQ_SENT:
3041 case I40IW_CM_STATE_MPAREQ_RCVD:
3042 i40iw_cleanup_retrans_entry(cm_node);
3043 i40iw_send_reset(cm_node);
3044 break;
3045 case I40IW_CM_STATE_CLOSE_WAIT:
3046 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3047 i40iw_send_fin(cm_node);
3048 break;
3049 case I40IW_CM_STATE_FIN_WAIT1:
3050 case I40IW_CM_STATE_FIN_WAIT2:
3051 case I40IW_CM_STATE_LAST_ACK:
3052 case I40IW_CM_STATE_TIME_WAIT:
3053 case I40IW_CM_STATE_CLOSING:
3054 ret = -1;
3055 break;
3056 case I40IW_CM_STATE_LISTENING:
3057 i40iw_cleanup_retrans_entry(cm_node);
3058 i40iw_send_reset(cm_node);
3059 break;
3060 case I40IW_CM_STATE_MPAREJ_RCVD:
3061 case I40IW_CM_STATE_UNKNOWN:
3062 case I40IW_CM_STATE_INITED:
3063 case I40IW_CM_STATE_CLOSED:
3064 case I40IW_CM_STATE_LISTENER_DESTROYED:
3065 i40iw_rem_ref_cm_node(cm_node);
3066 break;
3067 case I40IW_CM_STATE_OFFLOADED:
3068 if (cm_node->send_entry)
3069 i40iw_pr_err("send_entry\n");
3070 i40iw_rem_ref_cm_node(cm_node);
3071 break;
3072 }
3073 return ret;
3074 }
3075
3076 /**
3077 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3078 * through CM
3079 * @vsi: pointer to the vsi structure
3080 * @rbuf: receive buffer
3081 */
3082 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3083 {
3084 struct i40iw_cm_node *cm_node;
3085 struct i40iw_cm_listener *listener;
3086 struct iphdr *iph;
3087 struct ipv6hdr *ip6h;
3088 struct tcphdr *tcph;
3089 struct i40iw_cm_info cm_info;
3090 struct i40iw_sc_dev *dev = vsi->dev;
3091 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3092 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3093 struct vlan_ethhdr *ethh;
3094 u16 vtag;
3095
3096 /* if vlan, then maclen = 18 else 14 */
3097 iph = (struct iphdr *)rbuf->iph;
3098 memset(&cm_info, 0, sizeof(cm_info));
3099
3100 i40iw_debug_buf(dev,
3101 I40IW_DEBUG_ILQ,
3102 "RECEIVE ILQ BUFFER",
3103 rbuf->mem.va,
3104 rbuf->totallen);
3105 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3106
3107 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3108 vtag = ntohs(ethh->h_vlan_TCI);
3109 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3110 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3111 i40iw_debug(cm_core->dev,
3112 I40IW_DEBUG_CM,
3113 "%s vlan_id=%d\n",
3114 __func__,
3115 cm_info.vlan_id);
3116 } else {
3117 cm_info.vlan_id = I40IW_NO_VLAN;
3118 }
3119 tcph = (struct tcphdr *)rbuf->tcph;
3120
3121 if (rbuf->ipv4) {
3122 cm_info.loc_addr[0] = ntohl(iph->daddr);
3123 cm_info.rem_addr[0] = ntohl(iph->saddr);
3124 cm_info.ipv4 = true;
3125 cm_info.tos = iph->tos;
3126 } else {
3127 ip6h = (struct ipv6hdr *)rbuf->iph;
3128 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3129 ip6h->daddr.in6_u.u6_addr32);
3130 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3131 ip6h->saddr.in6_u.u6_addr32);
3132 cm_info.ipv4 = false;
3133 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3134 }
3135 cm_info.loc_port = ntohs(tcph->dest);
3136 cm_info.rem_port = ntohs(tcph->source);
3137 cm_node = i40iw_find_node(cm_core,
3138 cm_info.rem_port,
3139 cm_info.rem_addr,
3140 cm_info.loc_port,
3141 cm_info.loc_addr,
3142 true);
3143
3144 if (!cm_node) {
3145 /* Only type of packet accepted are for */
3146 /* the PASSIVE open (syn only) */
3147 if (!tcph->syn || tcph->ack)
3148 return;
3149 listener =
3150 i40iw_find_listener(cm_core,
3151 cm_info.loc_addr,
3152 cm_info.loc_port,
3153 cm_info.vlan_id,
3154 I40IW_CM_LISTENER_ACTIVE_STATE);
3155 if (!listener) {
3156 cm_info.cm_id = NULL;
3157 i40iw_debug(cm_core->dev,
3158 I40IW_DEBUG_CM,
3159 "%s no listener found\n",
3160 __func__);
3161 return;
3162 }
3163 cm_info.cm_id = listener->cm_id;
3164 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3165 if (!cm_node) {
3166 i40iw_debug(cm_core->dev,
3167 I40IW_DEBUG_CM,
3168 "%s allocate node failed\n",
3169 __func__);
3170 atomic_dec(&listener->ref_count);
3171 return;
3172 }
3173 if (!tcph->rst && !tcph->fin) {
3174 cm_node->state = I40IW_CM_STATE_LISTENING;
3175 } else {
3176 i40iw_rem_ref_cm_node(cm_node);
3177 return;
3178 }
3179 atomic_inc(&cm_node->ref_count);
3180 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3181 i40iw_rem_ref_cm_node(cm_node);
3182 return;
3183 }
3184 i40iw_process_packet(cm_node, rbuf);
3185 i40iw_rem_ref_cm_node(cm_node);
3186 }
3187
3188 /**
3189 * i40iw_setup_cm_core - allocate a top level instance of a cm
3190 * core
3191 * @iwdev: iwarp device structure
3192 */
3193 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3194 {
3195 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3196
3197 cm_core->iwdev = iwdev;
3198 cm_core->dev = &iwdev->sc_dev;
3199
3200 INIT_LIST_HEAD(&cm_core->connected_nodes);
3201 INIT_LIST_HEAD(&cm_core->listen_nodes);
3202
3203 timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0);
3204
3205 spin_lock_init(&cm_core->ht_lock);
3206 spin_lock_init(&cm_core->listen_list_lock);
3207
3208 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3209 WQ_MEM_RECLAIM);
3210
3211 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3212 WQ_MEM_RECLAIM);
3213 }
3214
3215 /**
3216 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3217 * cm core
3218 * @cm_core: cm's core
3219 */
3220 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3221 {
3222 unsigned long flags;
3223
3224 if (!cm_core)
3225 return;
3226
3227 spin_lock_irqsave(&cm_core->ht_lock, flags);
3228 if (timer_pending(&cm_core->tcp_timer))
3229 del_timer_sync(&cm_core->tcp_timer);
3230 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3231
3232 destroy_workqueue(cm_core->event_wq);
3233 destroy_workqueue(cm_core->disconn_wq);
3234 }
3235
3236 /**
3237 * i40iw_init_tcp_ctx - setup qp context
3238 * @cm_node: connection's node
3239 * @tcp_info: offload info for tcp
3240 * @iwqp: associate qp for the connection
3241 */
3242 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3243 struct i40iw_tcp_offload_info *tcp_info,
3244 struct i40iw_qp *iwqp)
3245 {
3246 tcp_info->ipv4 = cm_node->ipv4;
3247 tcp_info->drop_ooo_seg = true;
3248 tcp_info->wscale = true;
3249 tcp_info->ignore_tcp_opt = true;
3250 tcp_info->ignore_tcp_uns_opt = true;
3251 tcp_info->no_nagle = false;
3252
3253 tcp_info->ttl = I40IW_DEFAULT_TTL;
3254 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3255 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3256 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3257
3258 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3259 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3260 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3261
3262 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3263 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3264 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3265 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3266
3267 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3268 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3269 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3270 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3271 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3272 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3273 cm_node->tcp_cntxt.rcv_wscale);
3274
3275 tcp_info->flow_label = 0;
3276 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3277 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3278 tcp_info->insert_vlan_tag = true;
3279 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3280 cm_node->vlan_id);
3281 }
3282 if (cm_node->ipv4) {
3283 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3284 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3285
3286 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3287 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3288 tcp_info->arp_idx =
3289 cpu_to_le16((u16)i40iw_arp_table(
3290 iwqp->iwdev,
3291 &tcp_info->dest_ip_addr3,
3292 true,
3293 NULL,
3294 I40IW_ARP_RESOLVE));
3295 } else {
3296 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3297 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3298 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3299 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3300 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3301 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3302 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3303 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3304 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3305 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3306 tcp_info->arp_idx =
3307 cpu_to_le16((u16)i40iw_arp_table(
3308 iwqp->iwdev,
3309 &tcp_info->dest_ip_addr0,
3310 false,
3311 NULL,
3312 I40IW_ARP_RESOLVE));
3313 }
3314 }
3315
3316 /**
3317 * i40iw_cm_init_tsa_conn - setup qp for RTS
3318 * @iwqp: associate qp for the connection
3319 * @cm_node: connection's node
3320 */
3321 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3322 struct i40iw_cm_node *cm_node)
3323 {
3324 struct i40iw_tcp_offload_info tcp_info;
3325 struct i40iwarp_offload_info *iwarp_info;
3326 struct i40iw_qp_host_ctx_info *ctx_info;
3327 struct i40iw_device *iwdev = iwqp->iwdev;
3328 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3329
3330 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3331 iwarp_info = &iwqp->iwarp_info;
3332 ctx_info = &iwqp->ctx_info;
3333
3334 ctx_info->tcp_info = &tcp_info;
3335 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3336 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3337
3338 iwarp_info->ord_size = cm_node->ord_size;
3339 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3340
3341 if (iwarp_info->ord_size == 1)
3342 iwarp_info->ord_size = 2;
3343
3344 iwarp_info->rd_enable = true;
3345 iwarp_info->rdmap_ver = 1;
3346 iwarp_info->ddp_ver = 1;
3347
3348 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3349
3350 ctx_info->tcp_info_valid = true;
3351 ctx_info->iwarp_info_valid = true;
3352 ctx_info->add_to_qoslist = true;
3353 ctx_info->user_pri = cm_node->user_pri;
3354
3355 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3356 if (cm_node->snd_mark_en) {
3357 iwarp_info->snd_mark_en = true;
3358 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3359 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3360 }
3361
3362 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3363 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3364 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3365 tcp_info.tos = cm_node->tos;
3366
3367 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3368
3369 /* once tcp_info is set, no need to do it again */
3370 ctx_info->tcp_info_valid = false;
3371 ctx_info->iwarp_info_valid = false;
3372 ctx_info->add_to_qoslist = false;
3373 }
3374
3375 /**
3376 * i40iw_cm_disconn - when a connection is being closed
3377 * @iwqp: associate qp for the connection
3378 */
3379 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3380 {
3381 struct disconn_work *work;
3382 struct i40iw_device *iwdev = iwqp->iwdev;
3383 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3384 unsigned long flags;
3385
3386 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3387 if (!work)
3388 return; /* Timer will clean up */
3389
3390 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3391 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3392 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3393 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3394 "%s qp_id %d is already freed\n",
3395 __func__, iwqp->ibqp.qp_num);
3396 kfree(work);
3397 return;
3398 }
3399 i40iw_add_ref(&iwqp->ibqp);
3400 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3401
3402 work->iwqp = iwqp;
3403 INIT_WORK(&work->work, i40iw_disconnect_worker);
3404 queue_work(cm_core->disconn_wq, &work->work);
3405 return;
3406 }
3407
3408 /**
3409 * i40iw_qp_disconnect - free qp and close cm
3410 * @iwqp: associate qp for the connection
3411 */
3412 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3413 {
3414 struct i40iw_device *iwdev;
3415 struct i40iw_ib_device *iwibdev;
3416
3417 iwdev = to_iwdev(iwqp->ibqp.device);
3418 if (!iwdev) {
3419 i40iw_pr_err("iwdev == NULL\n");
3420 return;
3421 }
3422
3423 iwibdev = iwdev->iwibdev;
3424
3425 if (iwqp->active_conn) {
3426 /* indicate this connection is NOT active */
3427 iwqp->active_conn = 0;
3428 } else {
3429 /* Need to free the Last Streaming Mode Message */
3430 if (iwqp->ietf_mem.va) {
3431 if (iwqp->lsmm_mr)
3432 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3433 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3434 }
3435 }
3436
3437 /* close the CM node down if it is still active */
3438 if (iwqp->cm_node) {
3439 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3440 i40iw_cm_close(iwqp->cm_node);
3441 }
3442 }
3443
3444 /**
3445 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3446 * @iwqp: associate qp for the connection
3447 */
3448 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3449 {
3450 struct iw_cm_id *cm_id;
3451 struct i40iw_device *iwdev;
3452 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3453 u16 last_ae;
3454 u8 original_hw_tcp_state;
3455 u8 original_ibqp_state;
3456 int disconn_status = 0;
3457 int issue_disconn = 0;
3458 int issue_close = 0;
3459 int issue_flush = 0;
3460 struct ib_event ibevent;
3461 unsigned long flags;
3462 int ret;
3463
3464 if (!iwqp) {
3465 i40iw_pr_err("iwqp == NULL\n");
3466 return;
3467 }
3468
3469 spin_lock_irqsave(&iwqp->lock, flags);
3470 cm_id = iwqp->cm_id;
3471 /* make sure we havent already closed this connection */
3472 if (!cm_id) {
3473 spin_unlock_irqrestore(&iwqp->lock, flags);
3474 return;
3475 }
3476
3477 iwdev = to_iwdev(iwqp->ibqp.device);
3478
3479 original_hw_tcp_state = iwqp->hw_tcp_state;
3480 original_ibqp_state = iwqp->ibqp_state;
3481 last_ae = iwqp->last_aeq;
3482
3483 if (qp->term_flags) {
3484 issue_disconn = 1;
3485 issue_close = 1;
3486 iwqp->cm_id = NULL;
3487 /*When term timer expires after cm_timer, don't want
3488 *terminate-handler to issue cm_disconn which can re-free
3489 *a QP even after its refcnt=0.
3490 */
3491 i40iw_terminate_del_timer(qp);
3492 if (!iwqp->flush_issued) {
3493 iwqp->flush_issued = 1;
3494 issue_flush = 1;
3495 }
3496 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3497 ((original_ibqp_state == IB_QPS_RTS) &&
3498 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3499 issue_disconn = 1;
3500 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3501 disconn_status = -ECONNRESET;
3502 }
3503
3504 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3505 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3506 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3507 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3508 iwdev->reset)) {
3509 issue_close = 1;
3510 iwqp->cm_id = NULL;
3511 if (!iwqp->flush_issued) {
3512 iwqp->flush_issued = 1;
3513 issue_flush = 1;
3514 }
3515 }
3516
3517 spin_unlock_irqrestore(&iwqp->lock, flags);
3518 if (issue_flush && !iwqp->destroyed) {
3519 /* Flush the queues */
3520 i40iw_flush_wqes(iwdev, iwqp);
3521
3522 if (qp->term_flags && iwqp->ibqp.event_handler) {
3523 ibevent.device = iwqp->ibqp.device;
3524 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3525 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3526 ibevent.element.qp = &iwqp->ibqp;
3527 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3528 }
3529 }
3530
3531 if (cm_id && cm_id->event_handler) {
3532 if (issue_disconn) {
3533 ret = i40iw_send_cm_event(NULL,
3534 cm_id,
3535 IW_CM_EVENT_DISCONNECT,
3536 disconn_status);
3537
3538 if (ret)
3539 i40iw_debug(&iwdev->sc_dev,
3540 I40IW_DEBUG_CM,
3541 "disconnect event failed %s: - cm_id = %p\n",
3542 __func__, cm_id);
3543 }
3544 if (issue_close) {
3545 i40iw_qp_disconnect(iwqp);
3546 cm_id->provider_data = iwqp;
3547 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3548 if (ret)
3549 i40iw_debug(&iwdev->sc_dev,
3550 I40IW_DEBUG_CM,
3551 "close event failed %s: - cm_id = %p\n",
3552 __func__, cm_id);
3553 cm_id->rem_ref(cm_id);
3554 }
3555 }
3556 }
3557
3558 /**
3559 * i40iw_disconnect_worker - worker for connection close
3560 * @work: points or disconn structure
3561 */
3562 static void i40iw_disconnect_worker(struct work_struct *work)
3563 {
3564 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3565 struct i40iw_qp *iwqp = dwork->iwqp;
3566
3567 kfree(dwork);
3568 i40iw_cm_disconn_true(iwqp);
3569 i40iw_rem_ref(&iwqp->ibqp);
3570 }
3571
3572 /**
3573 * i40iw_accept - registered call for connection to be accepted
3574 * @cm_id: cm information for passive connection
3575 * @conn_param: accpet parameters
3576 */
3577 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3578 {
3579 struct ib_qp *ibqp;
3580 struct i40iw_qp *iwqp;
3581 struct i40iw_device *iwdev;
3582 struct i40iw_sc_dev *dev;
3583 struct i40iw_cm_node *cm_node;
3584 struct ib_qp_attr attr;
3585 int passive_state;
3586 struct ib_mr *ibmr;
3587 struct i40iw_pd *iwpd;
3588 u16 buf_len = 0;
3589 struct i40iw_kmem_info accept;
3590 enum i40iw_status_code status;
3591 u64 tagged_offset;
3592
3593 memset(&attr, 0, sizeof(attr));
3594 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3595 if (!ibqp)
3596 return -EINVAL;
3597
3598 iwqp = to_iwqp(ibqp);
3599 iwdev = iwqp->iwdev;
3600 dev = &iwdev->sc_dev;
3601 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3602
3603 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3604 cm_node->ipv4 = true;
3605 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3606 } else {
3607 cm_node->ipv4 = false;
3608 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3609 }
3610 i40iw_debug(cm_node->dev,
3611 I40IW_DEBUG_CM,
3612 "Accept vlan_id=%d\n",
3613 cm_node->vlan_id);
3614 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3615 if (cm_node->loopbackpartner)
3616 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3617 i40iw_rem_ref_cm_node(cm_node);
3618 return -EINVAL;
3619 }
3620
3621 passive_state = atomic_add_return(1, &cm_node->passive_state);
3622 if (passive_state == I40IW_SEND_RESET_EVENT) {
3623 i40iw_rem_ref_cm_node(cm_node);
3624 return -ECONNRESET;
3625 }
3626
3627 cm_node->cm_core->stats_accepts++;
3628 iwqp->cm_node = (void *)cm_node;
3629 cm_node->iwqp = iwqp;
3630
3631 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3632
3633 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3634
3635 if (status)
3636 return -ENOMEM;
3637 cm_node->pdata.size = conn_param->private_data_len;
3638 accept.addr = iwqp->ietf_mem.va;
3639 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3640 memcpy(accept.addr + accept.size, conn_param->private_data,
3641 conn_param->private_data_len);
3642
3643 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3644 if ((cm_node->ipv4 &&
3645 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3646 (!cm_node->ipv4 &&
3647 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3648 iwpd = iwqp->iwpd;
3649 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3650 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3651 iwqp->ietf_mem.pa,
3652 buf_len,
3653 IB_ACCESS_LOCAL_WRITE,
3654 &tagged_offset);
3655 if (IS_ERR(ibmr)) {
3656 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3657 return -ENOMEM;
3658 }
3659
3660 ibmr->pd = &iwpd->ibpd;
3661 ibmr->device = iwpd->ibpd.device;
3662 iwqp->lsmm_mr = ibmr;
3663 if (iwqp->page)
3664 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3665 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3666 iwqp->ietf_mem.va,
3667 (accept.size + conn_param->private_data_len),
3668 ibmr->lkey);
3669
3670 } else {
3671 if (iwqp->page)
3672 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3673 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3674 }
3675
3676 if (iwqp->page)
3677 kunmap(iwqp->page);
3678
3679 iwqp->cm_id = cm_id;
3680 cm_node->cm_id = cm_id;
3681
3682 cm_id->provider_data = (void *)iwqp;
3683 iwqp->active_conn = 0;
3684
3685 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3686 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3687 cm_id->add_ref(cm_id);
3688 i40iw_add_ref(&iwqp->ibqp);
3689
3690 attr.qp_state = IB_QPS_RTS;
3691 cm_node->qhash_set = false;
3692 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3693
3694 cm_node->accelerated = 1;
3695 status =
3696 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3697 if (status)
3698 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n");
3699
3700 if (cm_node->loopbackpartner) {
3701 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3702
3703 /* copy entire MPA frame to our cm_node's frame */
3704 memcpy(cm_node->loopbackpartner->pdata_buf,
3705 conn_param->private_data,
3706 conn_param->private_data_len);
3707 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3708 }
3709
3710 if (cm_node->accept_pend) {
3711 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3712 cm_node->accept_pend = 0;
3713 }
3714 return 0;
3715 }
3716
3717 /**
3718 * i40iw_reject - registered call for connection to be rejected
3719 * @cm_id: cm information for passive connection
3720 * @pdata: private data to be sent
3721 * @pdata_len: private data length
3722 */
3723 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3724 {
3725 struct i40iw_device *iwdev;
3726 struct i40iw_cm_node *cm_node;
3727 struct i40iw_cm_node *loopback;
3728
3729 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3730 loopback = cm_node->loopbackpartner;
3731 cm_node->cm_id = cm_id;
3732 cm_node->pdata.size = pdata_len;
3733
3734 iwdev = to_iwdev(cm_id->device);
3735 if (!iwdev)
3736 return -EINVAL;
3737 cm_node->cm_core->stats_rejects++;
3738
3739 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3740 return -EINVAL;
3741
3742 if (loopback) {
3743 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3744 loopback->pdata.size = pdata_len;
3745 }
3746
3747 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3748 }
3749
3750 /**
3751 * i40iw_connect - registered call for connection to be established
3752 * @cm_id: cm information for passive connection
3753 * @conn_param: Information about the connection
3754 */
3755 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3756 {
3757 struct ib_qp *ibqp;
3758 struct i40iw_qp *iwqp;
3759 struct i40iw_device *iwdev;
3760 struct i40iw_cm_node *cm_node;
3761 struct i40iw_cm_info cm_info;
3762 struct sockaddr_in *laddr;
3763 struct sockaddr_in *raddr;
3764 struct sockaddr_in6 *laddr6;
3765 struct sockaddr_in6 *raddr6;
3766 int ret = 0;
3767 unsigned long flags;
3768
3769 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3770 if (!ibqp)
3771 return -EINVAL;
3772 iwqp = to_iwqp(ibqp);
3773 if (!iwqp)
3774 return -EINVAL;
3775 iwdev = to_iwdev(iwqp->ibqp.device);
3776 if (!iwdev)
3777 return -EINVAL;
3778
3779 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3780 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3781 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3782 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3783
3784 if (!(laddr->sin_port) || !(raddr->sin_port))
3785 return -EINVAL;
3786
3787 iwqp->active_conn = 1;
3788 iwqp->cm_id = NULL;
3789 cm_id->provider_data = iwqp;
3790
3791 /* set up the connection params for the node */
3792 if (cm_id->remote_addr.ss_family == AF_INET) {
3793 cm_info.ipv4 = true;
3794 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3795 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3796 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3797 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3798 cm_info.loc_port = ntohs(laddr->sin_port);
3799 cm_info.rem_port = ntohs(raddr->sin_port);
3800 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3801 } else {
3802 cm_info.ipv4 = false;
3803 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3804 laddr6->sin6_addr.in6_u.u6_addr32);
3805 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3806 raddr6->sin6_addr.in6_u.u6_addr32);
3807 cm_info.loc_port = ntohs(laddr6->sin6_port);
3808 cm_info.rem_port = ntohs(raddr6->sin6_port);
3809 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3810 }
3811 cm_info.cm_id = cm_id;
3812 cm_info.tos = cm_id->tos;
3813 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3814 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3815 __func__, cm_id->tos, cm_info.user_pri);
3816 cm_id->add_ref(cm_id);
3817 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3818 conn_param->private_data_len,
3819 (void *)conn_param->private_data,
3820 &cm_info);
3821
3822 if (IS_ERR(cm_node)) {
3823 ret = PTR_ERR(cm_node);
3824 cm_id->rem_ref(cm_id);
3825 return ret;
3826 }
3827
3828 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3829 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3830 raddr6->sin6_addr.in6_u.u6_addr32,
3831 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3832 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3833 I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3834 ret = -EINVAL;
3835 goto err;
3836 }
3837 cm_node->qhash_set = true;
3838 }
3839
3840 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3841 if (!test_and_set_bit(cm_info.loc_port, iwdev->cm_core.active_side_ports)) {
3842 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3843 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD)) {
3844 ret = -EINVAL;
3845 goto err;
3846 }
3847 } else {
3848 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3849 }
3850
3851 cm_node->apbvt_set = true;
3852 i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3853 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3854 !cm_node->ord_size)
3855 cm_node->ord_size = 1;
3856
3857 iwqp->cm_node = cm_node;
3858 cm_node->iwqp = iwqp;
3859 iwqp->cm_id = cm_id;
3860 i40iw_add_ref(&iwqp->ibqp);
3861
3862 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3863 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3864 ret = i40iw_send_syn(cm_node, 0);
3865 if (ret)
3866 goto err;
3867 }
3868
3869 if (cm_node->loopbackpartner) {
3870 cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD;
3871 i40iw_create_event(cm_node->loopbackpartner,
3872 I40IW_CM_EVENT_MPA_REQ);
3873 }
3874
3875 i40iw_debug(cm_node->dev,
3876 I40IW_DEBUG_CM,
3877 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3878 cm_node->rem_port,
3879 cm_node,
3880 cm_node->cm_id);
3881
3882 return 0;
3883
3884 err:
3885 if (cm_info.ipv4)
3886 i40iw_debug(&iwdev->sc_dev,
3887 I40IW_DEBUG_CM,
3888 "Api - connect() FAILED: dest addr=%pI4",
3889 cm_info.rem_addr);
3890 else
3891 i40iw_debug(&iwdev->sc_dev,
3892 I40IW_DEBUG_CM,
3893 "Api - connect() FAILED: dest addr=%pI6",
3894 cm_info.rem_addr);
3895
3896 i40iw_rem_ref_cm_node(cm_node);
3897 cm_id->rem_ref(cm_id);
3898 iwdev->cm_core.stats_connect_errs++;
3899 return ret;
3900 }
3901
3902 /**
3903 * i40iw_create_listen - registered call creating listener
3904 * @cm_id: cm information for passive connection
3905 * @backlog: to max accept pending count
3906 */
3907 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3908 {
3909 struct i40iw_device *iwdev;
3910 struct i40iw_cm_listener *cm_listen_node;
3911 struct i40iw_cm_info cm_info;
3912 enum i40iw_status_code ret;
3913 struct sockaddr_in *laddr;
3914 struct sockaddr_in6 *laddr6;
3915 bool wildcard = false;
3916
3917 iwdev = to_iwdev(cm_id->device);
3918 if (!iwdev)
3919 return -EINVAL;
3920
3921 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3922 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3923 memset(&cm_info, 0, sizeof(cm_info));
3924 if (laddr->sin_family == AF_INET) {
3925 cm_info.ipv4 = true;
3926 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3927 cm_info.loc_port = ntohs(laddr->sin_port);
3928
3929 if (laddr->sin_addr.s_addr != INADDR_ANY)
3930 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3931 else
3932 wildcard = true;
3933
3934 } else {
3935 cm_info.ipv4 = false;
3936 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3937 laddr6->sin6_addr.in6_u.u6_addr32);
3938 cm_info.loc_port = ntohs(laddr6->sin6_port);
3939 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3940 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3941 &cm_info.vlan_id);
3942 else
3943 wildcard = true;
3944 }
3945 cm_info.backlog = backlog;
3946 cm_info.cm_id = cm_id;
3947
3948 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3949 if (!cm_listen_node) {
3950 i40iw_pr_err("cm_listen_node == NULL\n");
3951 return -ENOMEM;
3952 }
3953
3954 cm_id->provider_data = cm_listen_node;
3955
3956 cm_listen_node->tos = cm_id->tos;
3957 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3958 cm_info.user_pri = cm_listen_node->user_pri;
3959
3960 if (!cm_listen_node->reused_node) {
3961 if (wildcard) {
3962 if (cm_info.ipv4)
3963 ret = i40iw_add_mqh_4(iwdev,
3964 &cm_info,
3965 cm_listen_node);
3966 else
3967 ret = i40iw_add_mqh_6(iwdev,
3968 &cm_info,
3969 cm_listen_node);
3970 if (ret)
3971 goto error;
3972
3973 ret = i40iw_manage_apbvt(iwdev,
3974 cm_info.loc_port,
3975 I40IW_MANAGE_APBVT_ADD);
3976
3977 if (ret)
3978 goto error;
3979 } else {
3980 ret = i40iw_manage_qhash(iwdev,
3981 &cm_info,
3982 I40IW_QHASH_TYPE_TCP_SYN,
3983 I40IW_QHASH_MANAGE_TYPE_ADD,
3984 NULL,
3985 true);
3986 if (ret)
3987 goto error;
3988 cm_listen_node->qhash_set = true;
3989 ret = i40iw_manage_apbvt(iwdev,
3990 cm_info.loc_port,
3991 I40IW_MANAGE_APBVT_ADD);
3992 if (ret)
3993 goto error;
3994 }
3995 }
3996 cm_id->add_ref(cm_id);
3997 cm_listen_node->cm_core->stats_listen_created++;
3998 return 0;
3999 error:
4000 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
4001 return -EINVAL;
4002 }
4003
4004 /**
4005 * i40iw_destroy_listen - registered call to destroy listener
4006 * @cm_id: cm information for passive connection
4007 */
4008 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4009 {
4010 struct i40iw_device *iwdev;
4011
4012 iwdev = to_iwdev(cm_id->device);
4013 if (cm_id->provider_data)
4014 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4015 else
4016 i40iw_pr_err("cm_id->provider_data was NULL\n");
4017
4018 cm_id->rem_ref(cm_id);
4019
4020 return 0;
4021 }
4022
4023 /**
4024 * i40iw_cm_event_connected - handle connected active node
4025 * @event: the info for cm_node of connection
4026 */
4027 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4028 {
4029 struct i40iw_qp *iwqp;
4030 struct i40iw_device *iwdev;
4031 struct i40iw_cm_node *cm_node;
4032 struct i40iw_sc_dev *dev;
4033 struct ib_qp_attr attr;
4034 struct iw_cm_id *cm_id;
4035 int status;
4036 bool read0;
4037
4038 cm_node = event->cm_node;
4039 cm_id = cm_node->cm_id;
4040 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4041 iwdev = to_iwdev(iwqp->ibqp.device);
4042 dev = &iwdev->sc_dev;
4043
4044 if (iwqp->destroyed) {
4045 status = -ETIMEDOUT;
4046 goto error;
4047 }
4048 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4049 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4050 if (iwqp->page)
4051 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4052 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4053 if (iwqp->page)
4054 kunmap(iwqp->page);
4055
4056 memset(&attr, 0, sizeof(attr));
4057 attr.qp_state = IB_QPS_RTS;
4058 cm_node->qhash_set = false;
4059 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4060
4061 cm_node->accelerated = 1;
4062 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4063 0);
4064 if (status)
4065 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n");
4066
4067 return;
4068
4069 error:
4070 iwqp->cm_id = NULL;
4071 cm_id->provider_data = NULL;
4072 i40iw_send_cm_event(event->cm_node,
4073 cm_id,
4074 IW_CM_EVENT_CONNECT_REPLY,
4075 status);
4076 cm_id->rem_ref(cm_id);
4077 i40iw_rem_ref_cm_node(event->cm_node);
4078 }
4079
4080 /**
4081 * i40iw_cm_event_reset - handle reset
4082 * @event: the info for cm_node of connection
4083 */
4084 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4085 {
4086 struct i40iw_cm_node *cm_node = event->cm_node;
4087 struct iw_cm_id *cm_id = cm_node->cm_id;
4088 struct i40iw_qp *iwqp;
4089
4090 if (!cm_id)
4091 return;
4092
4093 iwqp = cm_id->provider_data;
4094 if (!iwqp)
4095 return;
4096
4097 i40iw_debug(cm_node->dev,
4098 I40IW_DEBUG_CM,
4099 "reset event %p - cm_id = %p\n",
4100 event->cm_node, cm_id);
4101 iwqp->cm_id = NULL;
4102
4103 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4104 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4105 }
4106
4107 /**
4108 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4109 * @work: pointer of cm event info.
4110 */
4111 static void i40iw_cm_event_handler(struct work_struct *work)
4112 {
4113 struct i40iw_cm_event *event = container_of(work,
4114 struct i40iw_cm_event,
4115 event_work);
4116 struct i40iw_cm_node *cm_node;
4117
4118 if (!event || !event->cm_node || !event->cm_node->cm_core)
4119 return;
4120
4121 cm_node = event->cm_node;
4122
4123 switch (event->type) {
4124 case I40IW_CM_EVENT_MPA_REQ:
4125 i40iw_send_cm_event(cm_node,
4126 cm_node->cm_id,
4127 IW_CM_EVENT_CONNECT_REQUEST,
4128 0);
4129 break;
4130 case I40IW_CM_EVENT_RESET:
4131 i40iw_cm_event_reset(event);
4132 break;
4133 case I40IW_CM_EVENT_CONNECTED:
4134 if (!event->cm_node->cm_id ||
4135 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4136 break;
4137 i40iw_cm_event_connected(event);
4138 break;
4139 case I40IW_CM_EVENT_MPA_REJECT:
4140 if (!event->cm_node->cm_id ||
4141 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4142 break;
4143 i40iw_send_cm_event(cm_node,
4144 cm_node->cm_id,
4145 IW_CM_EVENT_CONNECT_REPLY,
4146 -ECONNREFUSED);
4147 break;
4148 case I40IW_CM_EVENT_ABORTED:
4149 if (!event->cm_node->cm_id ||
4150 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4151 break;
4152 i40iw_event_connect_error(event);
4153 break;
4154 default:
4155 i40iw_pr_err("event type = %d\n", event->type);
4156 break;
4157 }
4158
4159 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4160 i40iw_rem_ref_cm_node(event->cm_node);
4161 kfree(event);
4162 }
4163
4164 /**
4165 * i40iw_cm_post_event - queue event request for worker thread
4166 * @event: cm node's info for up event call
4167 */
4168 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4169 {
4170 atomic_inc(&event->cm_node->ref_count);
4171 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4172 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4173
4174 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4175 }
4176
4177 /**
4178 * i40iw_qhash_ctrl - enable/disable qhash for list
4179 * @iwdev: device pointer
4180 * @parent_listen_node: parent listen node
4181 * @nfo: cm info node
4182 * @ipaddr: Pointer to IPv4 or IPv6 address
4183 * @ipv4: flag indicating IPv4 when true
4184 * @ifup: flag indicating interface up when true
4185 *
4186 * Enables or disables the qhash for the node in the child
4187 * listen list that matches ipaddr. If no matching IP was found
4188 * it will allocate and add a new child listen node to the
4189 * parent listen node. The listen_list_lock is assumed to be
4190 * held when called.
4191 */
4192 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4193 struct i40iw_cm_listener *parent_listen_node,
4194 struct i40iw_cm_info *nfo,
4195 u32 *ipaddr, bool ipv4, bool ifup)
4196 {
4197 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4198 struct i40iw_cm_listener *child_listen_node;
4199 struct list_head *pos, *tpos;
4200 enum i40iw_status_code ret;
4201 bool node_allocated = false;
4202 enum i40iw_quad_hash_manage_type op =
4203 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4204
4205 list_for_each_safe(pos, tpos, child_listen_list) {
4206 child_listen_node =
4207 list_entry(pos,
4208 struct i40iw_cm_listener,
4209 child_listen_list);
4210 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4211 goto set_qhash;
4212 }
4213
4214 /* if not found then add a child listener if interface is going up */
4215 if (!ifup)
4216 return;
4217 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4218 if (!child_listen_node)
4219 return;
4220 node_allocated = true;
4221 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4222
4223 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4224
4225 set_qhash:
4226 memcpy(nfo->loc_addr,
4227 child_listen_node->loc_addr,
4228 sizeof(nfo->loc_addr));
4229 nfo->vlan_id = child_listen_node->vlan_id;
4230 ret = i40iw_manage_qhash(iwdev, nfo,
4231 I40IW_QHASH_TYPE_TCP_SYN,
4232 op,
4233 NULL, false);
4234 if (!ret) {
4235 child_listen_node->qhash_set = ifup;
4236 if (node_allocated)
4237 list_add(&child_listen_node->child_listen_list,
4238 &parent_listen_node->child_listen_list);
4239 } else if (node_allocated) {
4240 kfree(child_listen_node);
4241 }
4242 }
4243
4244 /**
4245 * i40iw_cm_disconnect_all - disconnect all connected qp's
4246 * @iwdev: device pointer
4247 */
4248 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4249 {
4250 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4251 struct list_head *list_core_temp;
4252 struct list_head *list_node;
4253 struct i40iw_cm_node *cm_node;
4254 unsigned long flags;
4255 struct list_head connected_list;
4256 struct ib_qp_attr attr;
4257
4258 INIT_LIST_HEAD(&connected_list);
4259 spin_lock_irqsave(&cm_core->ht_lock, flags);
4260 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4261 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4262 atomic_inc(&cm_node->ref_count);
4263 list_add(&cm_node->connected_entry, &connected_list);
4264 }
4265 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4266
4267 list_for_each_safe(list_node, list_core_temp, &connected_list) {
4268 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4269 attr.qp_state = IB_QPS_ERR;
4270 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4271 if (iwdev->reset)
4272 i40iw_cm_disconn(cm_node->iwqp);
4273 i40iw_rem_ref_cm_node(cm_node);
4274 }
4275 }
4276
4277 /**
4278 * i40iw_ifdown_notify - process an ifdown on an interface
4279 * @iwdev: device pointer
4280 * @ipaddr: Pointer to IPv4 or IPv6 address
4281 * @ipv4: flag indicating IPv4 when true
4282 * @ifup: flag indicating interface up when true
4283 */
4284 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4285 u32 *ipaddr, bool ipv4, bool ifup)
4286 {
4287 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4288 unsigned long flags;
4289 struct i40iw_cm_listener *listen_node;
4290 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4291 struct i40iw_cm_info nfo;
4292 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4293 enum i40iw_status_code ret;
4294 enum i40iw_quad_hash_manage_type op =
4295 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4296
4297 /* Disable or enable qhash for listeners */
4298 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4299 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4300 if (vlan_id == listen_node->vlan_id &&
4301 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4302 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4303 memcpy(nfo.loc_addr, listen_node->loc_addr,
4304 sizeof(nfo.loc_addr));
4305 nfo.loc_port = listen_node->loc_port;
4306 nfo.ipv4 = listen_node->ipv4;
4307 nfo.vlan_id = listen_node->vlan_id;
4308 nfo.user_pri = listen_node->user_pri;
4309 if (!list_empty(&listen_node->child_listen_list)) {
4310 i40iw_qhash_ctrl(iwdev,
4311 listen_node,
4312 &nfo,
4313 ipaddr, ipv4, ifup);
4314 } else if (memcmp(listen_node->loc_addr, ip_zero,
4315 ipv4 ? 4 : 16)) {
4316 ret = i40iw_manage_qhash(iwdev,
4317 &nfo,
4318 I40IW_QHASH_TYPE_TCP_SYN,
4319 op,
4320 NULL,
4321 false);
4322 if (!ret)
4323 listen_node->qhash_set = ifup;
4324 }
4325 }
4326 }
4327 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4328
4329 /* disconnect any connected qp's on ifdown */
4330 if (!ifup)
4331 i40iw_cm_disconnect_all(iwdev);
4332 }
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