1 /*******************************************************************************
3 * Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 *******************************************************************************/
35 #include <linux/atomic.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>
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>
61 #include <asm/checksum.h>
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);
70 * i40iw_free_sqbuf - put back puda buffer if refcount = 0
71 * @vsi: pointer to vsi structure
72 * @buf: puda buffer to free
74 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
76 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
77 struct i40iw_puda_rsrc *ilq = vsi->ilq;
79 if (!atomic_dec_return(&buf->refcount))
80 i40iw_puda_ret_bufpool(ilq, buf);
84 * i40iw_derive_hw_ird_setting - Calculate IRD
86 * @cm_ird: IRD of connection's node
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
92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
97 /* round-off to next powerof2 */
98 while (pof2_cm_ird < cm_ird)
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;
106 case I40IW_HW_IRD_SETTING_32:
107 case I40IW_HW_IRD_SETTING_16:
108 encoded_ird_size = 2;
110 case I40IW_HW_IRD_SETTING_8:
111 case I40IW_HW_IRD_SETTING_4:
112 encoded_ird_size = 1;
114 case I40IW_HW_IRD_SETTING_2:
116 encoded_ird_size = 0;
119 return encoded_ird_size;
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
128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
131 if (conn_ird > I40IW_MAX_IRD_SIZE)
132 conn_ird = I40IW_MAX_IRD_SIZE;
134 if (conn_ord > I40IW_MAX_ORD_SIZE)
135 conn_ord = I40IW_MAX_ORD_SIZE;
137 cm_node->ird_size = conn_ird;
138 cm_node->ord_size = conn_ord;
142 * i40iw_copy_ip_ntohl - change network to host ip
146 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
148 *dst++ = ntohl(*src++);
149 *dst++ = ntohl(*src++);
150 *dst++ = ntohl(*src++);
155 * i40iw_copy_ip_htonl - change host addr to network ip
157 * @src: little endian
159 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
161 *dst++ = htonl(*src++);
162 *dst++ = htonl(*src++);
163 *dst++ = htonl(*src++);
168 * i40iw_fill_sockaddr4 - get addr info for passive connection
169 * @cm_node: connection's node
170 * @event: upper layer's cm event
172 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
173 struct iw_cm_event *event)
175 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
176 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
178 laddr->sin_family = AF_INET;
179 raddr->sin_family = AF_INET;
181 laddr->sin_port = htons(cm_node->loc_port);
182 raddr->sin_port = htons(cm_node->rem_port);
184 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
185 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
189 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
190 * @cm_node: connection's node
191 * @event: upper layer's cm event
193 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
194 struct iw_cm_event *event)
196 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
197 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
199 laddr6->sin6_family = AF_INET6;
200 raddr6->sin6_family = AF_INET6;
202 laddr6->sin6_port = htons(cm_node->loc_port);
203 raddr6->sin6_port = htons(cm_node->rem_port);
205 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
207 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
212 * i40iw_get_addr_info
213 * @cm_node: contains ip/tcp info
214 * @cm_info: to get a copy of the cm_node ip/tcp info
216 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
217 struct i40iw_cm_info *cm_info)
219 cm_info->ipv4 = cm_node->ipv4;
220 cm_info->vlan_id = cm_node->vlan_id;
221 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
222 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
223 cm_info->loc_port = cm_node->loc_port;
224 cm_info->rem_port = cm_node->rem_port;
225 cm_info->user_pri = cm_node->user_pri;
229 * i40iw_get_cmevent_info - for cm event upcall
230 * @cm_node: connection's node
231 * @cm_id: upper layers cm struct for the event
232 * @event: upper layer's cm event
234 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
235 struct iw_cm_id *cm_id,
236 struct iw_cm_event *event)
238 memcpy(&event->local_addr, &cm_id->m_local_addr,
239 sizeof(event->local_addr));
240 memcpy(&event->remote_addr, &cm_id->m_remote_addr,
241 sizeof(event->remote_addr));
243 event->private_data = (void *)cm_node->pdata_buf;
244 event->private_data_len = (u8)cm_node->pdata.size;
245 event->ird = cm_node->ird_size;
246 event->ord = cm_node->ord_size;
251 * i40iw_send_cm_event - upcall cm's event handler
252 * @cm_node: connection's node
253 * @cm_id: upper layer's cm info struct
254 * @type: Event type to indicate
255 * @status: status for the event type
257 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
258 struct iw_cm_id *cm_id,
259 enum iw_cm_event_type type,
262 struct iw_cm_event event;
264 memset(&event, 0, sizeof(event));
266 event.status = status;
268 case IW_CM_EVENT_CONNECT_REQUEST:
270 i40iw_fill_sockaddr4(cm_node, &event);
272 i40iw_fill_sockaddr6(cm_node, &event);
273 event.provider_data = (void *)cm_node;
274 event.private_data = (void *)cm_node->pdata_buf;
275 event.private_data_len = (u8)cm_node->pdata.size;
276 event.ird = cm_node->ird_size;
278 case IW_CM_EVENT_CONNECT_REPLY:
279 i40iw_get_cmevent_info(cm_node, cm_id, &event);
281 case IW_CM_EVENT_ESTABLISHED:
282 event.ird = cm_node->ird_size;
283 event.ord = cm_node->ord_size;
285 case IW_CM_EVENT_DISCONNECT:
287 case IW_CM_EVENT_CLOSE:
290 i40iw_pr_err("event type received type = %d\n", type);
293 return cm_id->event_handler(cm_id, &event);
297 * i40iw_create_event - create cm event
298 * @cm_node: connection's node
299 * @type: Event type to generate
301 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
302 enum i40iw_cm_event_type type)
304 struct i40iw_cm_event *event;
309 event = kzalloc(sizeof(*event), GFP_ATOMIC);
315 event->cm_node = cm_node;
316 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
317 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
318 event->cm_info.rem_port = cm_node->rem_port;
319 event->cm_info.loc_port = cm_node->loc_port;
320 event->cm_info.cm_id = cm_node->cm_id;
322 i40iw_debug(cm_node->dev,
324 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
328 event->cm_info.loc_addr,
329 event->cm_info.rem_addr);
331 i40iw_cm_post_event(event);
336 * i40iw_free_retrans_entry - free send entry
337 * @cm_node: connection's node
339 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
341 struct i40iw_device *iwdev = cm_node->iwdev;
342 struct i40iw_timer_entry *send_entry;
344 send_entry = cm_node->send_entry;
346 cm_node->send_entry = NULL;
347 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
349 atomic_dec(&cm_node->ref_count);
354 * i40iw_cleanup_retrans_entry - free send entry with lock
355 * @cm_node: connection's node
357 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
361 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
362 i40iw_free_retrans_entry(cm_node);
363 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
367 * i40iw_form_cm_frame - get a free packet and build frame
368 * @cm_node: connection's node ionfo to use in frame
369 * @options: pointer to options info
370 * @hdr: pointer mpa header
371 * @pdata: pointer to private data
372 * @flags: indicates FIN or ACK
374 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
375 struct i40iw_kmem_info *options,
376 struct i40iw_kmem_info *hdr,
377 struct i40iw_kmem_info *pdata,
380 struct i40iw_puda_buf *sqbuf;
381 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
386 struct ipv6hdr *ip6h;
389 u16 eth_hlen = ETH_HLEN;
395 sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
401 opts_len = (u32)options->size;
407 pd_len = pdata->size;
409 if (cm_node->vlan_id < VLAN_TAG_PRESENT)
413 packetsize = sizeof(*iph) + sizeof(*tcph);
415 packetsize = sizeof(*ip6h) + sizeof(*tcph);
416 packetsize += opts_len + hdr_len + pd_len;
418 memset(buf, 0x00, eth_hlen + packetsize);
420 sqbuf->totallen = packetsize + eth_hlen;
421 sqbuf->maclen = eth_hlen;
422 sqbuf->tcphlen = sizeof(*tcph) + opts_len;
423 sqbuf->scratch = (void *)cm_node;
425 ethh = (struct ethhdr *)buf;
431 iph = (struct iphdr *)buf;
433 tcph = (struct tcphdr *)buf;
434 buf += sizeof(*tcph);
436 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
437 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
438 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
439 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
440 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
441 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
443 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
445 ethh->h_proto = htons(ETH_P_IP);
448 iph->version = IPVERSION;
449 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
450 iph->tos = cm_node->tos;
451 iph->tot_len = htons(packetsize);
452 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
454 iph->frag_off = htons(0x4000);
456 iph->protocol = IPPROTO_TCP;
457 iph->saddr = htonl(cm_node->loc_addr[0]);
458 iph->daddr = htonl(cm_node->rem_addr[0]);
461 ip6h = (struct ipv6hdr *)buf;
462 buf += sizeof(*ip6h);
463 tcph = (struct tcphdr *)buf;
464 buf += sizeof(*tcph);
466 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
467 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
468 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
469 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
470 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
471 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
472 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
474 ethh->h_proto = htons(ETH_P_IPV6);
477 ip6h->priority = cm_node->tos >> 4;
478 ip6h->flow_lbl[0] = cm_node->tos << 4;
479 ip6h->flow_lbl[1] = 0;
480 ip6h->flow_lbl[2] = 0;
481 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
483 ip6h->hop_limit = 128;
484 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
486 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
490 tcph->source = htons(cm_node->loc_port);
491 tcph->dest = htons(cm_node->rem_port);
493 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
495 if (flags & SET_ACK) {
496 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
497 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
503 if (flags & SET_SYN) {
504 cm_node->tcp_cntxt.loc_seq_num++;
507 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
510 if (flags & SET_FIN) {
511 cm_node->tcp_cntxt.loc_seq_num++;
518 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
519 sqbuf->tcphlen = tcph->doff << 2;
520 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
524 memcpy(buf, options->addr, opts_len);
529 memcpy(buf, hdr->addr, hdr_len);
533 if (pdata && pdata->addr)
534 memcpy(buf, pdata->addr, pdata->size);
536 atomic_set(&sqbuf->refcount, 1);
542 * i40iw_send_reset - Send RST packet
543 * @cm_node: connection's node
545 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
547 struct i40iw_puda_buf *sqbuf;
548 int flags = SET_RST | SET_ACK;
550 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
552 i40iw_pr_err("no sqbuf\n");
556 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
560 * i40iw_active_open_err - send event for active side cm error
561 * @cm_node: connection's node
562 * @reset: Flag to send reset or not
564 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
566 i40iw_cleanup_retrans_entry(cm_node);
567 cm_node->cm_core->stats_connect_errs++;
569 i40iw_debug(cm_node->dev,
571 "%s cm_node=%p state=%d\n",
575 atomic_inc(&cm_node->ref_count);
576 i40iw_send_reset(cm_node);
579 cm_node->state = I40IW_CM_STATE_CLOSED;
580 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
584 * i40iw_passive_open_err - handle passive side cm error
585 * @cm_node: connection's node
586 * @reset: send reset or just free cm_node
588 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
590 i40iw_cleanup_retrans_entry(cm_node);
591 cm_node->cm_core->stats_passive_errs++;
592 cm_node->state = I40IW_CM_STATE_CLOSED;
593 i40iw_debug(cm_node->dev,
595 "%s cm_node=%p state =%d\n",
600 i40iw_send_reset(cm_node);
602 i40iw_rem_ref_cm_node(cm_node);
606 * i40iw_event_connect_error - to create connect error event
607 * @event: cm information for connect event
609 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
611 struct i40iw_qp *iwqp;
612 struct iw_cm_id *cm_id;
614 cm_id = event->cm_node->cm_id;
618 iwqp = cm_id->provider_data;
620 if (!iwqp || !iwqp->iwdev)
624 cm_id->provider_data = NULL;
625 i40iw_send_cm_event(event->cm_node, cm_id,
626 IW_CM_EVENT_CONNECT_REPLY,
628 cm_id->rem_ref(cm_id);
629 i40iw_rem_ref_cm_node(event->cm_node);
633 * i40iw_process_options
634 * @cm_node: connection's node
635 * @optionsloc: point to start of options
636 * @optionsize: size of all options
637 * @syn_packet: flag if syn packet
639 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
646 union all_known_options *all_options;
647 char got_mss_option = 0;
649 while (offset < optionsize) {
650 all_options = (union all_known_options *)(optionsloc + offset);
651 switch (all_options->as_base.optionnum) {
652 case OPTION_NUMBER_END:
655 case OPTION_NUMBER_NONE:
658 case OPTION_NUMBER_MSS:
659 i40iw_debug(cm_node->dev,
661 "%s: MSS Length: %d Offset: %d Size: %d\n",
663 all_options->as_mss.length,
667 if (all_options->as_mss.length != 4)
669 tmp = ntohs(all_options->as_mss.mss);
670 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
671 cm_node->tcp_cntxt.mss = tmp;
673 case OPTION_NUMBER_WINDOW_SCALE:
674 cm_node->tcp_cntxt.snd_wscale =
675 all_options->as_windowscale.shiftcount;
678 i40iw_debug(cm_node->dev,
680 "TCP Option not understood: %x\n",
681 all_options->as_base.optionnum);
684 offset += all_options->as_base.length;
686 if (!got_mss_option && syn_packet)
687 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
692 * i40iw_handle_tcp_options -
693 * @cm_node: connection's node
694 * @tcph: pointer tcp header
695 * @optionsize: size of options rcvd
696 * @passive: active or passive flag
698 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
703 u8 *optionsloc = (u8 *)&tcph[1];
706 if (i40iw_process_options(cm_node,
710 i40iw_debug(cm_node->dev,
712 "%s: Node %p, Sending RESET\n",
716 i40iw_passive_open_err(cm_node, true);
718 i40iw_active_open_err(cm_node, true);
723 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
724 cm_node->tcp_cntxt.snd_wscale;
726 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
727 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
732 * i40iw_build_mpa_v1 - build a MPA V1 frame
733 * @cm_node: connection's node
734 * @mpa_key: to do read0 or write0
736 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
740 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
743 case MPA_KEY_REQUEST:
744 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
747 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
752 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
753 mpa_frame->rev = cm_node->mpa_frame_rev;
754 mpa_frame->priv_data_len = htons(cm_node->pdata.size);
758 * i40iw_build_mpa_v2 - build a MPA V2 frame
759 * @cm_node: connection's node
760 * @start_addr: buffer start address
761 * @mpa_key: to do read0 or write0
763 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
767 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
768 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
769 u16 ctrl_ird, ctrl_ord;
771 /* initialize the upper 5 bytes of the frame */
772 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
773 mpa_frame->flags |= IETF_MPA_V2_FLAG;
774 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
776 /* initialize RTR msg */
777 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
778 ctrl_ird = IETF_NO_IRD_ORD;
779 ctrl_ord = IETF_NO_IRD_ORD;
781 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
782 IETF_NO_IRD_ORD : cm_node->ird_size;
783 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
784 IETF_NO_IRD_ORD : cm_node->ord_size;
787 ctrl_ird |= IETF_PEER_TO_PEER;
790 case MPA_KEY_REQUEST:
791 ctrl_ord |= IETF_RDMA0_WRITE;
792 ctrl_ord |= IETF_RDMA0_READ;
795 switch (cm_node->send_rdma0_op) {
796 case SEND_RDMA_WRITE_ZERO:
797 ctrl_ord |= IETF_RDMA0_WRITE;
799 case SEND_RDMA_READ_ZERO:
800 ctrl_ord |= IETF_RDMA0_READ;
807 rtr_msg->ctrl_ird = htons(ctrl_ird);
808 rtr_msg->ctrl_ord = htons(ctrl_ord);
812 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
813 * @cm_node: connection's node
814 * @mpa: mpa: data buffer
815 * @mpa_key: to do read0 or write0
817 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
818 struct i40iw_kmem_info *mpa,
823 switch (cm_node->mpa_frame_rev) {
825 hdr_len = sizeof(struct ietf_mpa_v1);
826 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
829 hdr_len = sizeof(struct ietf_mpa_v2);
830 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
840 * i40iw_send_mpa_request - active node send mpa request to passive node
841 * @cm_node: connection's node
843 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
845 struct i40iw_puda_buf *sqbuf;
848 i40iw_pr_err("cm_node == NULL\n");
852 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
853 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
856 if (!cm_node->mpa_hdr.size) {
857 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
861 sqbuf = i40iw_form_cm_frame(cm_node,
867 i40iw_pr_err("sq_buf == NULL\n");
870 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
874 * i40iw_send_mpa_reject -
875 * @cm_node: connection's node
876 * @pdata: reject data for connection
877 * @plen: length of reject data
879 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
883 struct i40iw_puda_buf *sqbuf;
884 struct i40iw_kmem_info priv_info;
886 cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
887 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
891 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
892 priv_info.addr = (void *)pdata;
893 priv_info.size = plen;
895 sqbuf = i40iw_form_cm_frame(cm_node,
901 i40iw_pr_err("no sqbuf\n");
904 cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
905 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
909 * recv_mpa - process an IETF MPA frame
910 * @cm_node: connection's node
911 * @buffer: Data pointer
912 * @type: to return accept or reject
913 * @len: Len of mpa buffer
915 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
917 struct ietf_mpa_v1 *mpa_frame;
918 struct ietf_mpa_v2 *mpa_v2_frame;
919 struct ietf_rtr_msg *rtr_msg;
923 *type = I40IW_MPA_REQUEST_ACCEPT;
925 if (len < sizeof(struct ietf_mpa_v1)) {
926 i40iw_pr_err("ietf buffer small (%x)\n", len);
930 mpa_frame = (struct ietf_mpa_v1 *)buffer;
931 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
932 priv_data_len = ntohs(mpa_frame->priv_data_len);
934 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
935 i40iw_pr_err("large pri_data %d\n", priv_data_len);
938 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
939 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
942 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
943 i40iw_pr_err("rev %d\n", mpa_frame->rev);
946 cm_node->mpa_frame_rev = mpa_frame->rev;
948 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
949 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
950 i40iw_pr_err("Unexpected MPA Key received\n");
954 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
955 i40iw_pr_err("Unexpected MPA Key received\n");
960 if (priv_data_len + mpa_hdr_len > len) {
961 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
962 priv_data_len, mpa_hdr_len, len);
965 if (len > MAX_CM_BUFFER) {
966 i40iw_pr_err("ietf buffer large len = %d\n", len);
970 switch (mpa_frame->rev) {
977 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
978 mpa_hdr_len += IETF_RTR_MSG_SIZE;
979 rtr_msg = &mpa_v2_frame->rtr_msg;
981 /* parse rtr message */
982 ctrl_ord = ntohs(rtr_msg->ctrl_ord);
983 ctrl_ird = ntohs(rtr_msg->ctrl_ird);
984 ird_size = ctrl_ird & IETF_NO_IRD_ORD;
985 ord_size = ctrl_ord & IETF_NO_IRD_ORD;
987 if (!(ctrl_ird & IETF_PEER_TO_PEER))
990 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
991 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
995 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
997 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
998 cm_node->ird_size = 1;
999 if (cm_node->ord_size > ird_size)
1000 cm_node->ord_size = ird_size;
1003 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1005 if (cm_node->ord_size > ird_size)
1006 cm_node->ord_size = ird_size;
1008 if (cm_node->ird_size < ord_size)
1009 /* no resources available */
1014 if (ctrl_ord & IETF_RDMA0_READ)
1015 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1016 else if (ctrl_ord & IETF_RDMA0_WRITE)
1017 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1018 else /* Not supported RDMA0 operation */
1020 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1021 "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1022 cm_node->ord_size, cm_node->ird_size);
1031 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1032 cm_node->pdata.size = priv_data_len;
1034 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1035 *type = I40IW_MPA_REQUEST_REJECT;
1037 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1038 cm_node->snd_mark_en = true;
1044 * i40iw_schedule_cm_timer
1045 * @@cm_node: connection's node
1046 * @sqbuf: buffer to send
1047 * @type: if it is send or close
1048 * @send_retrans: if rexmits to be done
1049 * @close_when_complete: is cm_node to be removed
1051 * note - cm_node needs to be protected before calling this. Encase in:
1052 * i40iw_rem_ref_cm_node(cm_core, cm_node);
1053 * i40iw_schedule_cm_timer(...)
1054 * atomic_inc(&cm_node->ref_count);
1056 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1057 struct i40iw_puda_buf *sqbuf,
1058 enum i40iw_timer_type type,
1060 int close_when_complete)
1062 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1063 struct i40iw_cm_core *cm_core = cm_node->cm_core;
1064 struct i40iw_timer_entry *new_send;
1067 unsigned long flags;
1069 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1071 if (type != I40IW_TIMER_TYPE_CLOSE)
1072 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1075 new_send->retrycount = I40IW_DEFAULT_RETRYS;
1076 new_send->retranscount = I40IW_DEFAULT_RETRANS;
1077 new_send->sqbuf = sqbuf;
1078 new_send->timetosend = jiffies;
1079 new_send->type = type;
1080 new_send->send_retrans = send_retrans;
1081 new_send->close_when_complete = close_when_complete;
1083 if (type == I40IW_TIMER_TYPE_CLOSE) {
1084 new_send->timetosend += (HZ / 10);
1085 if (cm_node->close_entry) {
1087 i40iw_pr_err("already close entry\n");
1090 cm_node->close_entry = new_send;
1093 if (type == I40IW_TIMER_TYPE_SEND) {
1094 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1095 cm_node->send_entry = new_send;
1096 atomic_inc(&cm_node->ref_count);
1097 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1098 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1100 atomic_inc(&sqbuf->refcount);
1101 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1102 if (!send_retrans) {
1103 i40iw_cleanup_retrans_entry(cm_node);
1104 if (close_when_complete)
1105 i40iw_rem_ref_cm_node(cm_node);
1110 spin_lock_irqsave(&cm_core->ht_lock, flags);
1111 was_timer_set = timer_pending(&cm_core->tcp_timer);
1113 if (!was_timer_set) {
1114 cm_core->tcp_timer.expires = new_send->timetosend;
1115 add_timer(&cm_core->tcp_timer);
1117 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1123 * i40iw_retrans_expired - Could not rexmit the packet
1124 * @cm_node: connection's node
1126 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1128 struct iw_cm_id *cm_id = cm_node->cm_id;
1129 enum i40iw_cm_node_state state = cm_node->state;
1131 cm_node->state = I40IW_CM_STATE_CLOSED;
1133 case I40IW_CM_STATE_SYN_RCVD:
1134 case I40IW_CM_STATE_CLOSING:
1135 i40iw_rem_ref_cm_node(cm_node);
1137 case I40IW_CM_STATE_FIN_WAIT1:
1138 case I40IW_CM_STATE_LAST_ACK:
1140 cm_id->rem_ref(cm_id);
1141 i40iw_send_reset(cm_node);
1144 atomic_inc(&cm_node->ref_count);
1145 i40iw_send_reset(cm_node);
1146 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1152 * i40iw_handle_close_entry - for handling retry/timeouts
1153 * @cm_node: connection's node
1154 * @rem_node: flag for remove cm_node
1156 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1158 struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1159 struct iw_cm_id *cm_id = cm_node->cm_id;
1160 struct i40iw_qp *iwqp;
1161 unsigned long flags;
1165 iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1167 spin_lock_irqsave(&iwqp->lock, flags);
1169 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1170 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1171 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1172 iwqp->ibqp_state = IB_QPS_ERR;
1173 spin_unlock_irqrestore(&iwqp->lock, flags);
1174 i40iw_cm_disconn(iwqp);
1176 spin_unlock_irqrestore(&iwqp->lock, flags);
1178 } else if (rem_node) {
1179 /* TIME_WAIT state */
1180 i40iw_rem_ref_cm_node(cm_node);
1183 cm_id->rem_ref(cm_id);
1185 cm_node->close_entry = NULL;
1189 * i40iw_cm_timer_tick - system's timer expired callback
1190 * @pass: Pointing to cm_core
1192 static void i40iw_cm_timer_tick(unsigned long pass)
1194 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1195 struct i40iw_cm_node *cm_node;
1196 struct i40iw_timer_entry *send_entry, *close_entry;
1197 struct list_head *list_core_temp;
1198 struct i40iw_sc_vsi *vsi;
1199 struct list_head *list_node;
1200 struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1202 unsigned long timetosend;
1203 struct i40iw_sc_dev *dev;
1204 unsigned long flags;
1206 struct list_head timer_list;
1208 INIT_LIST_HEAD(&timer_list);
1209 spin_lock_irqsave(&cm_core->ht_lock, flags);
1211 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1212 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1213 if (cm_node->close_entry || cm_node->send_entry) {
1214 atomic_inc(&cm_node->ref_count);
1215 list_add(&cm_node->timer_entry, &timer_list);
1218 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1220 list_for_each_safe(list_node, list_core_temp, &timer_list) {
1221 cm_node = container_of(list_node,
1222 struct i40iw_cm_node,
1224 close_entry = cm_node->close_entry;
1227 if (time_after(close_entry->timetosend, jiffies)) {
1228 if (nexttimeout > close_entry->timetosend ||
1230 nexttimeout = close_entry->timetosend;
1234 i40iw_handle_close_entry(cm_node, 1);
1238 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1240 send_entry = cm_node->send_entry;
1243 if (time_after(send_entry->timetosend, jiffies)) {
1244 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1245 if ((nexttimeout > send_entry->timetosend) ||
1247 nexttimeout = send_entry->timetosend;
1251 i40iw_free_retrans_entry(cm_node);
1256 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1257 (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1258 i40iw_free_retrans_entry(cm_node);
1262 if (!send_entry->retranscount || !send_entry->retrycount) {
1263 i40iw_free_retrans_entry(cm_node);
1265 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1266 i40iw_retrans_expired(cm_node);
1267 cm_node->state = I40IW_CM_STATE_CLOSED;
1268 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1271 cm_node->cm_core->stats_pkt_retrans++;
1272 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1274 vsi = &cm_node->iwdev->vsi;
1276 atomic_inc(&send_entry->sqbuf->refcount);
1277 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
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));
1285 send_entry->timetosend = jiffies +
1286 min(timetosend, I40IW_MAX_TIMEOUT);
1287 if (nexttimeout > send_entry->timetosend || !settimer) {
1288 nexttimeout = send_entry->timetosend;
1292 int close_when_complete;
1294 close_when_complete = send_entry->close_when_complete;
1295 i40iw_debug(cm_node->dev,
1297 "cm_node=%p state=%d\n",
1300 i40iw_free_retrans_entry(cm_node);
1301 if (close_when_complete)
1302 i40iw_rem_ref_cm_node(cm_node);
1305 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1306 i40iw_rem_ref_cm_node(cm_node);
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);
1315 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1320 * i40iw_send_syn - send SYN packet
1321 * @cm_node: connection's node
1322 * @sendack: flag to set ACK bit or not
1324 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
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;
1333 int optionssize = 0;
1334 /* Sending MSS option */
1335 union all_known_options *options;
1337 opts.addr = optionsbuffer;
1339 i40iw_pr_err("no cm_node\n");
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);
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;
1361 opts.size = optionssize;
1363 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1365 i40iw_pr_err("no sqbuf\n");
1368 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1372 * i40iw_send_ack - Send ACK packet
1373 * @cm_node: connection's node
1375 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1377 struct i40iw_puda_buf *sqbuf;
1378 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1380 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1382 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1384 i40iw_pr_err("no sqbuf\n");
1388 * i40iw_send_fin - Send FIN pkt
1389 * @cm_node: connection's node
1391 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1393 struct i40iw_puda_buf *sqbuf;
1395 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1397 i40iw_pr_err("no sqbuf\n");
1400 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
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
1412 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1419 struct list_head *hte;
1420 struct i40iw_cm_node *cm_node;
1421 unsigned long flags;
1423 hte = &cm_core->connected_nodes;
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)) {
1433 atomic_inc(&cm_node->ref_count);
1434 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1438 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
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
1451 static struct i40iw_cm_listener *i40iw_find_listener(
1452 struct i40iw_cm_core *cm_core,
1456 enum i40iw_cm_listener_state
1459 struct i40iw_cm_listener *listen_node;
1460 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1463 unsigned long flags;
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);
1480 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
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
1489 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1490 struct i40iw_cm_node *cm_node)
1492 struct list_head *hte;
1493 unsigned long flags;
1495 if (!cm_node || !cm_core) {
1496 i40iw_pr_err("cm_node or cm_core == NULL\n");
1499 spin_lock_irqsave(&cm_core->ht_lock, flags);
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);
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
1512 static bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port, bool active_side)
1514 struct i40iw_cm_listener *listen_node;
1515 struct i40iw_cm_node *cm_node;
1516 unsigned long flags;
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) {
1529 clear_bit(port, cm_core->active_side_ports);
1530 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
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) {
1539 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
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
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)
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;
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,
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);
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);
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,
1586 child_listen_node->qhash_set = false;
1588 ret = I40IW_SUCCESS;
1590 i40iw_debug(&iwdev->sc_dev,
1592 "freed pointer = %p\n",
1594 kfree(child_listen_node);
1595 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1597 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
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
1607 * Returns the net_device of the IPv6 address and also sets the
1608 * vlan id for that address.
1610 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1612 struct net_device *ip_dev = NULL;
1613 struct in6_addr laddr6;
1615 if (!IS_ENABLED(CONFIG_IPV6))
1617 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1619 *vlan_id = I40IW_NO_VLAN;
1621 for_each_netdev_rcu(&init_net, ip_dev) {
1622 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1624 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1633 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1634 * @addr: local IPv4 address
1636 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1638 struct net_device *netdev;
1639 u16 vlan_id = I40IW_NO_VLAN;
1641 netdev = ip_dev_find(&init_net, htonl(addr[0]));
1643 vlan_id = rdma_vlan_dev_vlan_id(netdev);
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
1655 * Adds a qhash and a child listen node for every IPv6 address
1656 * on the adapter and adds the associated qhash filter
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)
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;
1670 for_each_netdev(&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);
1676 i40iw_pr_err("idev == NULL\n");
1679 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1680 i40iw_debug(&iwdev->sc_dev,
1682 "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1684 rdma_vlan_dev_vlan_id(ip_dev),
1687 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1688 i40iw_debug(&iwdev->sc_dev,
1690 "Allocating child listener %p\n",
1692 if (!child_listen_node) {
1693 ret = I40IW_ERR_NO_MEMORY;
1696 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1697 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1699 memcpy(child_listen_node, cm_parent_listen_node,
1700 sizeof(*child_listen_node));
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));
1707 ret = i40iw_manage_qhash(iwdev, cm_info,
1708 I40IW_QHASH_TYPE_TCP_SYN,
1709 I40IW_QHASH_MANAGE_TYPE_ADD,
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++;
1719 kfree(child_listen_node);
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
1735 * Adds a qhash and a child listen node for every IPv4 address
1736 * on the adapter and adds the associated qhash filter
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)
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;
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);
1756 i40iw_debug(&iwdev->sc_dev,
1758 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1760 rdma_vlan_dev_vlan_id(dev),
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,
1766 "Allocating child listener %p\n",
1768 if (!child_listen_node) {
1770 ret = I40IW_ERR_NO_MEMORY;
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));
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));
1783 ret = i40iw_manage_qhash(iwdev,
1785 I40IW_QHASH_TYPE_TCP_SYN,
1786 I40IW_QHASH_MANAGE_TYPE_ADD,
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);
1796 kfree(child_listen_node);
1797 cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
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
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)
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;
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);
1841 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
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);
1851 i40iw_cleanup_retrans_entry(cm_node);
1852 err = i40iw_send_reset(cm_node);
1854 cm_node->state = I40IW_CM_STATE_CLOSED;
1855 i40iw_pr_err("send reset\n");
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);
1863 struct i40iw_cm_event event;
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);
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);
1888 if (listener->iwdev) {
1889 if (apbvt_del && !i40iw_port_in_use(cm_core, listener->loc_port, false))
1890 i40iw_manage_apbvt(listener->iwdev,
1892 I40IW_MANAGE_APBVT_DEL);
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;
1900 if (!list_empty(&listener->child_listen_list)) {
1901 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1903 if (listener->qhash_set)
1904 i40iw_manage_qhash(listener->iwdev,
1906 I40IW_QHASH_TYPE_TCP_SYN,
1907 I40IW_QHASH_MANAGE_TYPE_DELETE,
1913 cm_core->stats_listen_destroyed++;
1915 cm_core->stats_listen_nodes_destroyed++;
1921 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1922 i40iw_debug(cm_core->dev,
1924 "%s: listener (%p) pending accepts=%u\n",
1927 atomic_read(&listener->pend_accepts_cnt));
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
1939 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1940 struct i40iw_cm_listener *listener,
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);
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
1955 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1961 struct neighbour *neigh;
1963 struct net_device *netdev = iwdev->netdev;
1964 __be32 dst_ipaddr = htonl(dst_ip);
1965 __be32 src_ipaddr = htonl(src_ip);
1967 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1969 i40iw_pr_err("ip_route_output\n");
1973 if (netif_is_bond_slave(netdev))
1974 netdev = netdev_master_upper_dev_get(netdev);
1976 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1980 if (neigh->nud_state & NUD_VALID) {
1981 if (arpindex >= 0) {
1982 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
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,
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);
1996 neigh_event_send(neigh, NULL);
2003 neigh_release(neigh);
2010 * i40iw_get_dst_ipv6
2012 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2013 struct sockaddr_in6 *dst_addr)
2015 struct dst_entry *dst;
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;
2024 dst = ip6_route_output(&init_net, NULL, &fl6);
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
2034 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2039 struct neighbour *neigh;
2041 struct net_device *netdev = iwdev->netdev;
2042 struct dst_entry *dst;
2043 struct sockaddr_in6 dst_addr;
2044 struct sockaddr_in6 src_addr;
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) {
2055 i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2062 if (netif_is_bond_slave(netdev))
2063 netdev = netdev_master_upper_dev_get(netdev);
2065 neigh = dst_neigh_lookup(dst, &dst_addr);
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,
2075 /* Mac address same as in arp table */
2076 goto resolve_neigh_exit6;
2078 i40iw_manage_arp_cache(iwdev,
2079 iwdev->arp_table[arpindex].mac_addr,
2084 i40iw_manage_arp_cache(iwdev,
2089 rc = i40iw_arp_table(iwdev,
2095 neigh_event_send(neigh, NULL);
2099 resolve_neigh_exit6:
2102 neigh_release(neigh);
2108 * i40iw_ipv4_is_loopback - check if loopback
2109 * @loc_addr: local addr to compare
2110 * @rem_addr: remote address
2112 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2114 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2118 * i40iw_ipv6_is_loopback - check if loopback
2119 * @loc_addr: local addr to compare
2120 * @rem_addr: remote address
2122 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2124 struct in6_addr raddr6;
2126 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2127 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
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
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)
2143 struct i40iw_cm_node *cm_node;
2147 struct net_device *netdev = iwdev->netdev;
2149 /* create an hte and cm_node for this instance */
2150 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
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;
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);
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;
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;
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);
2186 atomic_set(&cm_node->ref_count, 1);
2187 /* associate our parent CM core */
2188 cm_node->cm_core = cm_core;
2189 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2190 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2191 cm_node->tcp_cntxt.rcv_wnd =
2192 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2193 ts = current_kernel_time();
2194 cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2195 cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2197 cm_node->iwdev = iwdev;
2198 cm_node->dev = &iwdev->sc_dev;
2200 if ((cm_node->ipv4 &&
2201 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2202 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2203 cm_node->rem_addr))) {
2204 arpindex = i40iw_arp_table(iwdev,
2210 oldarpindex = i40iw_arp_table(iwdev,
2216 arpindex = i40iw_addr_resolve_neigh(iwdev,
2217 cm_info->loc_addr[0],
2218 cm_info->rem_addr[0],
2220 else if (IS_ENABLED(CONFIG_IPV6))
2221 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2229 i40iw_pr_err("cm_node arpindex\n");
2233 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2234 i40iw_add_hte_node(cm_core, cm_node);
2235 cm_core->stats_nodes_created++;
2240 * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2241 * @cm_node: connection's node
2243 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2245 struct i40iw_cm_core *cm_core = cm_node->cm_core;
2246 struct i40iw_qp *iwqp;
2247 struct i40iw_cm_info nfo;
2248 unsigned long flags;
2250 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2251 if (atomic_dec_return(&cm_node->ref_count)) {
2252 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2255 list_del(&cm_node->list);
2256 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2258 /* if the node is destroyed before connection was accelerated */
2259 if (!cm_node->accelerated && cm_node->accept_pend) {
2260 pr_err("node destroyed before established\n");
2261 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2263 if (cm_node->close_entry)
2264 i40iw_handle_close_entry(cm_node, 0);
2265 if (cm_node->listener) {
2266 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2268 if (!i40iw_port_in_use(cm_core, cm_node->loc_port, true) && cm_node->apbvt_set) {
2269 i40iw_manage_apbvt(cm_node->iwdev,
2271 I40IW_MANAGE_APBVT_DEL);
2272 cm_node->apbvt_set = 0;
2274 i40iw_get_addr_info(cm_node, &nfo);
2275 if (cm_node->qhash_set) {
2276 i40iw_manage_qhash(cm_node->iwdev,
2278 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2279 I40IW_QHASH_MANAGE_TYPE_DELETE,
2282 cm_node->qhash_set = 0;
2286 iwqp = cm_node->iwqp;
2288 iwqp->cm_node = NULL;
2289 i40iw_rem_ref(&iwqp->ibqp);
2290 cm_node->iwqp = NULL;
2291 } else if (cm_node->qhash_set) {
2292 i40iw_get_addr_info(cm_node, &nfo);
2293 i40iw_manage_qhash(cm_node->iwdev,
2295 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2296 I40IW_QHASH_MANAGE_TYPE_DELETE,
2299 cm_node->qhash_set = 0;
2302 cm_node->cm_core->stats_nodes_destroyed++;
2307 * i40iw_handle_fin_pkt - FIN packet received
2308 * @cm_node: connection's node
2310 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2314 switch (cm_node->state) {
2315 case I40IW_CM_STATE_SYN_RCVD:
2316 case I40IW_CM_STATE_SYN_SENT:
2317 case I40IW_CM_STATE_ESTABLISHED:
2318 case I40IW_CM_STATE_MPAREJ_RCVD:
2319 cm_node->tcp_cntxt.rcv_nxt++;
2320 i40iw_cleanup_retrans_entry(cm_node);
2321 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2322 i40iw_send_fin(cm_node);
2324 case I40IW_CM_STATE_MPAREQ_SENT:
2325 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2326 cm_node->tcp_cntxt.rcv_nxt++;
2327 i40iw_cleanup_retrans_entry(cm_node);
2328 cm_node->state = I40IW_CM_STATE_CLOSED;
2329 atomic_inc(&cm_node->ref_count);
2330 i40iw_send_reset(cm_node);
2332 case I40IW_CM_STATE_FIN_WAIT1:
2333 cm_node->tcp_cntxt.rcv_nxt++;
2334 i40iw_cleanup_retrans_entry(cm_node);
2335 cm_node->state = I40IW_CM_STATE_CLOSING;
2336 i40iw_send_ack(cm_node);
2338 * Wait for ACK as this is simultaneous close.
2339 * After we receive ACK, do not send anything.
2343 case I40IW_CM_STATE_FIN_WAIT2:
2344 cm_node->tcp_cntxt.rcv_nxt++;
2345 i40iw_cleanup_retrans_entry(cm_node);
2346 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2347 i40iw_send_ack(cm_node);
2349 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2351 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2353 case I40IW_CM_STATE_TIME_WAIT:
2354 cm_node->tcp_cntxt.rcv_nxt++;
2355 i40iw_cleanup_retrans_entry(cm_node);
2356 cm_node->state = I40IW_CM_STATE_CLOSED;
2357 i40iw_rem_ref_cm_node(cm_node);
2359 case I40IW_CM_STATE_OFFLOADED:
2361 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2367 * i40iw_handle_rst_pkt - process received RST packet
2368 * @cm_node: connection's node
2369 * @rbuf: receive buffer
2371 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2372 struct i40iw_puda_buf *rbuf)
2374 i40iw_cleanup_retrans_entry(cm_node);
2375 switch (cm_node->state) {
2376 case I40IW_CM_STATE_SYN_SENT:
2377 case I40IW_CM_STATE_MPAREQ_SENT:
2378 switch (cm_node->mpa_frame_rev) {
2380 cm_node->mpa_frame_rev = IETF_MPA_V1;
2381 /* send a syn and goto syn sent state */
2382 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2383 if (i40iw_send_syn(cm_node, 0))
2384 i40iw_active_open_err(cm_node, false);
2388 i40iw_active_open_err(cm_node, false);
2392 case I40IW_CM_STATE_MPAREQ_RCVD:
2393 atomic_add_return(1, &cm_node->passive_state);
2395 case I40IW_CM_STATE_ESTABLISHED:
2396 case I40IW_CM_STATE_SYN_RCVD:
2397 case I40IW_CM_STATE_LISTENING:
2398 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2399 i40iw_passive_open_err(cm_node, false);
2401 case I40IW_CM_STATE_OFFLOADED:
2402 i40iw_active_open_err(cm_node, false);
2404 case I40IW_CM_STATE_CLOSED:
2406 case I40IW_CM_STATE_FIN_WAIT2:
2407 case I40IW_CM_STATE_FIN_WAIT1:
2408 case I40IW_CM_STATE_LAST_ACK:
2409 cm_node->cm_id->rem_ref(cm_node->cm_id);
2410 case I40IW_CM_STATE_TIME_WAIT:
2411 cm_node->state = I40IW_CM_STATE_CLOSED;
2412 i40iw_rem_ref_cm_node(cm_node);
2420 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2421 * @cm_node: connection's node
2422 * @rbuf: receive buffer
2424 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2425 struct i40iw_puda_buf *rbuf)
2428 int datasize = rbuf->datalen;
2429 u8 *dataloc = rbuf->data;
2431 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2434 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2436 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2437 i40iw_active_open_err(cm_node, true);
2439 i40iw_passive_open_err(cm_node, true);
2443 switch (cm_node->state) {
2444 case I40IW_CM_STATE_ESTABLISHED:
2445 if (res_type == I40IW_MPA_REQUEST_REJECT)
2446 i40iw_pr_err("state for reject\n");
2447 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2448 type = I40IW_CM_EVENT_MPA_REQ;
2449 i40iw_send_ack(cm_node); /* ACK received MPA request */
2450 atomic_set(&cm_node->passive_state,
2451 I40IW_PASSIVE_STATE_INDICATED);
2453 case I40IW_CM_STATE_MPAREQ_SENT:
2454 i40iw_cleanup_retrans_entry(cm_node);
2455 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2456 type = I40IW_CM_EVENT_MPA_REJECT;
2457 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2459 type = I40IW_CM_EVENT_CONNECTED;
2460 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2462 i40iw_send_ack(cm_node);
2465 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2468 i40iw_create_event(cm_node, type);
2472 * i40iw_indicate_pkt_err - Send up err event to cm
2473 * @cm_node: connection's node
2475 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2477 switch (cm_node->state) {
2478 case I40IW_CM_STATE_SYN_SENT:
2479 case I40IW_CM_STATE_MPAREQ_SENT:
2480 i40iw_active_open_err(cm_node, true);
2482 case I40IW_CM_STATE_ESTABLISHED:
2483 case I40IW_CM_STATE_SYN_RCVD:
2484 i40iw_passive_open_err(cm_node, true);
2486 case I40IW_CM_STATE_OFFLOADED:
2493 * i40iw_check_syn - Check for error on received syn ack
2494 * @cm_node: connection's node
2495 * @tcph: pointer tcp header
2497 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2501 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2503 i40iw_active_open_err(cm_node, true);
2509 * i40iw_check_seq - check seq numbers if OK
2510 * @cm_node: connection's node
2511 * @tcph: pointer tcp header
2513 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2518 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2519 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2522 seq = ntohl(tcph->seq);
2523 ack_seq = ntohl(tcph->ack_seq);
2524 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2525 if (ack_seq != loc_seq_num)
2527 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2530 i40iw_pr_err("seq number\n");
2531 i40iw_indicate_pkt_err(cm_node);
2537 * i40iw_handle_syn_pkt - is for Passive node
2538 * @cm_node: connection's node
2539 * @rbuf: receive buffer
2541 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2542 struct i40iw_puda_buf *rbuf)
2544 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2548 struct i40iw_cm_info nfo;
2550 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2551 inc_sequence = ntohl(tcph->seq);
2553 switch (cm_node->state) {
2554 case I40IW_CM_STATE_SYN_SENT:
2555 case I40IW_CM_STATE_MPAREQ_SENT:
2556 /* Rcvd syn on active open connection */
2557 i40iw_active_open_err(cm_node, 1);
2559 case I40IW_CM_STATE_LISTENING:
2561 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2562 cm_node->listener->backlog) {
2563 cm_node->cm_core->stats_backlog_drops++;
2564 i40iw_passive_open_err(cm_node, false);
2567 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2569 i40iw_passive_open_err(cm_node, false);
2573 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2574 cm_node->accept_pend = 1;
2575 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2577 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2578 i40iw_get_addr_info(cm_node, &nfo);
2579 ret = i40iw_manage_qhash(cm_node->iwdev,
2581 I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2582 I40IW_QHASH_MANAGE_TYPE_ADD,
2585 cm_node->qhash_set = true;
2587 case I40IW_CM_STATE_CLOSED:
2588 i40iw_cleanup_retrans_entry(cm_node);
2589 atomic_inc(&cm_node->ref_count);
2590 i40iw_send_reset(cm_node);
2592 case I40IW_CM_STATE_OFFLOADED:
2593 case I40IW_CM_STATE_ESTABLISHED:
2594 case I40IW_CM_STATE_FIN_WAIT1:
2595 case I40IW_CM_STATE_FIN_WAIT2:
2596 case I40IW_CM_STATE_MPAREQ_RCVD:
2597 case I40IW_CM_STATE_LAST_ACK:
2598 case I40IW_CM_STATE_CLOSING:
2599 case I40IW_CM_STATE_UNKNOWN:
2606 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2607 * @cm_node: connection's node
2608 * @rbuf: receive buffer
2610 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2611 struct i40iw_puda_buf *rbuf)
2613 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2618 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2619 inc_sequence = ntohl(tcph->seq);
2620 switch (cm_node->state) {
2621 case I40IW_CM_STATE_SYN_SENT:
2622 i40iw_cleanup_retrans_entry(cm_node);
2624 if (i40iw_check_syn(cm_node, tcph)) {
2625 i40iw_pr_err("check syn fail\n");
2628 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2630 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2632 i40iw_debug(cm_node->dev,
2634 "cm_node=%p tcp_options failed\n",
2638 i40iw_cleanup_retrans_entry(cm_node);
2639 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2640 i40iw_send_ack(cm_node); /* ACK for the syn_ack */
2641 ret = i40iw_send_mpa_request(cm_node);
2643 i40iw_debug(cm_node->dev,
2645 "cm_node=%p i40iw_send_mpa_request failed\n",
2649 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2651 case I40IW_CM_STATE_MPAREQ_RCVD:
2652 i40iw_passive_open_err(cm_node, true);
2654 case I40IW_CM_STATE_LISTENING:
2655 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2656 i40iw_cleanup_retrans_entry(cm_node);
2657 cm_node->state = I40IW_CM_STATE_CLOSED;
2658 i40iw_send_reset(cm_node);
2660 case I40IW_CM_STATE_CLOSED:
2661 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2662 i40iw_cleanup_retrans_entry(cm_node);
2663 atomic_inc(&cm_node->ref_count);
2664 i40iw_send_reset(cm_node);
2666 case I40IW_CM_STATE_ESTABLISHED:
2667 case I40IW_CM_STATE_FIN_WAIT1:
2668 case I40IW_CM_STATE_FIN_WAIT2:
2669 case I40IW_CM_STATE_LAST_ACK:
2670 case I40IW_CM_STATE_OFFLOADED:
2671 case I40IW_CM_STATE_CLOSING:
2672 case I40IW_CM_STATE_UNKNOWN:
2673 case I40IW_CM_STATE_MPAREQ_SENT:
2680 * i40iw_handle_ack_pkt - process packet with ACK
2681 * @cm_node: connection's node
2682 * @rbuf: receive buffer
2684 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2685 struct i40iw_puda_buf *rbuf)
2687 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2691 u32 datasize = rbuf->datalen;
2693 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2695 if (i40iw_check_seq(cm_node, tcph))
2698 inc_sequence = ntohl(tcph->seq);
2699 switch (cm_node->state) {
2700 case I40IW_CM_STATE_SYN_RCVD:
2701 i40iw_cleanup_retrans_entry(cm_node);
2702 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2705 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2706 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2708 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2709 i40iw_handle_rcv_mpa(cm_node, rbuf);
2712 case I40IW_CM_STATE_ESTABLISHED:
2713 i40iw_cleanup_retrans_entry(cm_node);
2715 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2716 i40iw_handle_rcv_mpa(cm_node, rbuf);
2719 case I40IW_CM_STATE_MPAREQ_SENT:
2720 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2722 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2723 i40iw_handle_rcv_mpa(cm_node, rbuf);
2726 case I40IW_CM_STATE_LISTENING:
2727 i40iw_cleanup_retrans_entry(cm_node);
2728 cm_node->state = I40IW_CM_STATE_CLOSED;
2729 i40iw_send_reset(cm_node);
2731 case I40IW_CM_STATE_CLOSED:
2732 i40iw_cleanup_retrans_entry(cm_node);
2733 atomic_inc(&cm_node->ref_count);
2734 i40iw_send_reset(cm_node);
2736 case I40IW_CM_STATE_LAST_ACK:
2737 case I40IW_CM_STATE_CLOSING:
2738 i40iw_cleanup_retrans_entry(cm_node);
2739 cm_node->state = I40IW_CM_STATE_CLOSED;
2740 if (!cm_node->accept_pend)
2741 cm_node->cm_id->rem_ref(cm_node->cm_id);
2742 i40iw_rem_ref_cm_node(cm_node);
2744 case I40IW_CM_STATE_FIN_WAIT1:
2745 i40iw_cleanup_retrans_entry(cm_node);
2746 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2748 case I40IW_CM_STATE_SYN_SENT:
2749 case I40IW_CM_STATE_FIN_WAIT2:
2750 case I40IW_CM_STATE_OFFLOADED:
2751 case I40IW_CM_STATE_MPAREQ_RCVD:
2752 case I40IW_CM_STATE_UNKNOWN:
2754 i40iw_cleanup_retrans_entry(cm_node);
2761 * i40iw_process_packet - process cm packet
2762 * @cm_node: connection's node
2763 * @rbuf: receive buffer
2765 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2766 struct i40iw_puda_buf *rbuf)
2768 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2769 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2774 pkt_type = I40IW_PKT_TYPE_RST;
2775 } else if (tcph->syn) {
2776 pkt_type = I40IW_PKT_TYPE_SYN;
2778 pkt_type = I40IW_PKT_TYPE_SYNACK;
2779 } else if (tcph->ack) {
2780 pkt_type = I40IW_PKT_TYPE_ACK;
2786 case I40IW_PKT_TYPE_SYN:
2787 i40iw_handle_syn_pkt(cm_node, rbuf);
2789 case I40IW_PKT_TYPE_SYNACK:
2790 i40iw_handle_synack_pkt(cm_node, rbuf);
2792 case I40IW_PKT_TYPE_ACK:
2793 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2794 if (fin_set && !ret)
2795 i40iw_handle_fin_pkt(cm_node);
2797 case I40IW_PKT_TYPE_RST:
2798 i40iw_handle_rst_pkt(cm_node, rbuf);
2802 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2803 i40iw_handle_fin_pkt(cm_node);
2809 * i40iw_make_listen_node - create a listen node with params
2810 * @cm_core: cm's core
2811 * @iwdev: iwarp device structure
2812 * @cm_info: quad info for connection
2814 static struct i40iw_cm_listener *i40iw_make_listen_node(
2815 struct i40iw_cm_core *cm_core,
2816 struct i40iw_device *iwdev,
2817 struct i40iw_cm_info *cm_info)
2819 struct i40iw_cm_listener *listener;
2820 unsigned long flags;
2822 /* cannot have multiple matching listeners */
2823 listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2826 I40IW_CM_LISTENER_EITHER_STATE);
2828 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2829 atomic_dec(&listener->ref_count);
2830 i40iw_debug(cm_core->dev,
2832 "Not creating listener since it already exists\n");
2837 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2838 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2841 cm_core->stats_listen_nodes_created++;
2842 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2843 listener->loc_port = cm_info->loc_port;
2845 INIT_LIST_HEAD(&listener->child_listen_list);
2847 atomic_set(&listener->ref_count, 1);
2849 listener->reused_node = 1;
2852 listener->cm_id = cm_info->cm_id;
2853 listener->ipv4 = cm_info->ipv4;
2854 listener->vlan_id = cm_info->vlan_id;
2855 atomic_set(&listener->pend_accepts_cnt, 0);
2856 listener->cm_core = cm_core;
2857 listener->iwdev = iwdev;
2859 listener->backlog = cm_info->backlog;
2860 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2862 if (!listener->reused_node) {
2863 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2864 list_add(&listener->list, &cm_core->listen_nodes);
2865 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2872 * i40iw_create_cm_node - make a connection node with params
2873 * @cm_core: cm's core
2874 * @iwdev: iwarp device structure
2875 * @private_data_len: len to provate data for mpa request
2876 * @private_data: pointer to private data for connection
2877 * @cm_info: quad info for connection
2879 static struct i40iw_cm_node *i40iw_create_cm_node(
2880 struct i40iw_cm_core *cm_core,
2881 struct i40iw_device *iwdev,
2882 u16 private_data_len,
2884 struct i40iw_cm_info *cm_info)
2886 struct i40iw_cm_node *cm_node;
2887 struct i40iw_cm_listener *loopback_remotelistener;
2888 struct i40iw_cm_node *loopback_remotenode;
2889 struct i40iw_cm_info loopback_cm_info;
2891 /* create a CM connection node */
2892 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2894 return ERR_PTR(-ENOMEM);
2895 /* set our node side to client (active) side */
2896 cm_node->tcp_cntxt.client = 1;
2897 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2899 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2900 loopback_remotelistener = i40iw_find_listener(
2905 I40IW_CM_LISTENER_ACTIVE_STATE);
2906 if (!loopback_remotelistener) {
2907 i40iw_rem_ref_cm_node(cm_node);
2908 return ERR_PTR(-ECONNREFUSED);
2910 loopback_cm_info = *cm_info;
2911 loopback_cm_info.loc_port = cm_info->rem_port;
2912 loopback_cm_info.rem_port = cm_info->loc_port;
2913 loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2914 loopback_cm_info.ipv4 = cm_info->ipv4;
2915 loopback_remotenode = i40iw_make_cm_node(cm_core,
2918 loopback_remotelistener);
2919 if (!loopback_remotenode) {
2920 i40iw_rem_ref_cm_node(cm_node);
2921 return ERR_PTR(-ENOMEM);
2923 cm_core->stats_loopbacks++;
2924 loopback_remotenode->loopbackpartner = cm_node;
2925 loopback_remotenode->tcp_cntxt.rcv_wscale =
2926 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2927 cm_node->loopbackpartner = loopback_remotenode;
2928 memcpy(loopback_remotenode->pdata_buf, private_data,
2930 loopback_remotenode->pdata.size = private_data_len;
2932 cm_node->state = I40IW_CM_STATE_OFFLOADED;
2933 cm_node->tcp_cntxt.rcv_nxt =
2934 loopback_remotenode->tcp_cntxt.loc_seq_num;
2935 loopback_remotenode->tcp_cntxt.rcv_nxt =
2936 cm_node->tcp_cntxt.loc_seq_num;
2937 cm_node->tcp_cntxt.max_snd_wnd =
2938 loopback_remotenode->tcp_cntxt.rcv_wnd;
2939 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2940 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2941 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2942 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2943 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2944 loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2945 i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2950 cm_node->pdata.size = private_data_len;
2951 cm_node->pdata.addr = cm_node->pdata_buf;
2953 memcpy(cm_node->pdata_buf, private_data, private_data_len);
2955 cm_node->state = I40IW_CM_STATE_SYN_SENT;
2960 * i40iw_cm_reject - reject and teardown a connection
2961 * @cm_node: connection's node
2962 * @pdate: ptr to private data for reject
2963 * @plen: size of private data
2965 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2970 struct iw_cm_id *cm_id = cm_node->cm_id;
2971 struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2973 if (cm_node->tcp_cntxt.client)
2975 i40iw_cleanup_retrans_entry(cm_node);
2978 passive_state = atomic_add_return(1, &cm_node->passive_state);
2979 if (passive_state == I40IW_SEND_RESET_EVENT) {
2980 cm_node->state = I40IW_CM_STATE_CLOSED;
2981 i40iw_rem_ref_cm_node(cm_node);
2983 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2984 i40iw_rem_ref_cm_node(cm_node);
2986 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2988 cm_node->state = I40IW_CM_STATE_CLOSED;
2989 err = i40iw_send_reset(cm_node);
2991 i40iw_pr_err("send reset failed\n");
2993 cm_id->add_ref(cm_id);
2998 cm_node->cm_id = NULL;
2999 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3000 i40iw_rem_ref_cm_node(cm_node);
3001 i40iw_rem_ref_cm_node(loopback);
3003 ret = i40iw_send_cm_event(loopback,
3005 IW_CM_EVENT_CONNECT_REPLY,
3007 i40iw_rem_ref_cm_node(cm_node);
3008 loopback->state = I40IW_CM_STATE_CLOSING;
3010 cm_id = loopback->cm_id;
3011 i40iw_rem_ref_cm_node(loopback);
3012 cm_id->rem_ref(cm_id);
3020 * i40iw_cm_close - close of cm connection
3021 * @cm_node: connection's node
3023 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3030 switch (cm_node->state) {
3031 case I40IW_CM_STATE_SYN_RCVD:
3032 case I40IW_CM_STATE_SYN_SENT:
3033 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3034 case I40IW_CM_STATE_ESTABLISHED:
3035 case I40IW_CM_STATE_ACCEPTING:
3036 case I40IW_CM_STATE_MPAREQ_SENT:
3037 case I40IW_CM_STATE_MPAREQ_RCVD:
3038 i40iw_cleanup_retrans_entry(cm_node);
3039 i40iw_send_reset(cm_node);
3041 case I40IW_CM_STATE_CLOSE_WAIT:
3042 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3043 i40iw_send_fin(cm_node);
3045 case I40IW_CM_STATE_FIN_WAIT1:
3046 case I40IW_CM_STATE_FIN_WAIT2:
3047 case I40IW_CM_STATE_LAST_ACK:
3048 case I40IW_CM_STATE_TIME_WAIT:
3049 case I40IW_CM_STATE_CLOSING:
3052 case I40IW_CM_STATE_LISTENING:
3053 i40iw_cleanup_retrans_entry(cm_node);
3054 i40iw_send_reset(cm_node);
3056 case I40IW_CM_STATE_MPAREJ_RCVD:
3057 case I40IW_CM_STATE_UNKNOWN:
3058 case I40IW_CM_STATE_INITED:
3059 case I40IW_CM_STATE_CLOSED:
3060 case I40IW_CM_STATE_LISTENER_DESTROYED:
3061 i40iw_rem_ref_cm_node(cm_node);
3063 case I40IW_CM_STATE_OFFLOADED:
3064 if (cm_node->send_entry)
3065 i40iw_pr_err("send_entry\n");
3066 i40iw_rem_ref_cm_node(cm_node);
3073 * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3075 * @vsi: pointer to the vsi structure
3076 * @rbuf: receive buffer
3078 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3080 struct i40iw_cm_node *cm_node;
3081 struct i40iw_cm_listener *listener;
3083 struct ipv6hdr *ip6h;
3084 struct tcphdr *tcph;
3085 struct i40iw_cm_info cm_info;
3086 struct i40iw_sc_dev *dev = vsi->dev;
3087 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3088 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3089 struct vlan_ethhdr *ethh;
3092 /* if vlan, then maclen = 18 else 14 */
3093 iph = (struct iphdr *)rbuf->iph;
3094 memset(&cm_info, 0, sizeof(cm_info));
3096 i40iw_debug_buf(dev,
3098 "RECEIVE ILQ BUFFER",
3101 ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3103 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3104 vtag = ntohs(ethh->h_vlan_TCI);
3105 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3106 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3107 i40iw_debug(cm_core->dev,
3113 cm_info.vlan_id = I40IW_NO_VLAN;
3115 tcph = (struct tcphdr *)rbuf->tcph;
3118 cm_info.loc_addr[0] = ntohl(iph->daddr);
3119 cm_info.rem_addr[0] = ntohl(iph->saddr);
3120 cm_info.ipv4 = true;
3121 cm_info.tos = iph->tos;
3123 ip6h = (struct ipv6hdr *)rbuf->iph;
3124 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3125 ip6h->daddr.in6_u.u6_addr32);
3126 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3127 ip6h->saddr.in6_u.u6_addr32);
3128 cm_info.ipv4 = false;
3129 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3131 cm_info.loc_port = ntohs(tcph->dest);
3132 cm_info.rem_port = ntohs(tcph->source);
3133 cm_node = i40iw_find_node(cm_core,
3141 /* Only type of packet accepted are for */
3142 /* the PASSIVE open (syn only) */
3143 if (!tcph->syn || tcph->ack)
3146 i40iw_find_listener(cm_core,
3150 I40IW_CM_LISTENER_ACTIVE_STATE);
3152 cm_info.cm_id = NULL;
3153 i40iw_debug(cm_core->dev,
3155 "%s no listener found\n",
3159 cm_info.cm_id = listener->cm_id;
3160 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3162 i40iw_debug(cm_core->dev,
3164 "%s allocate node failed\n",
3166 atomic_dec(&listener->ref_count);
3169 if (!tcph->rst && !tcph->fin) {
3170 cm_node->state = I40IW_CM_STATE_LISTENING;
3172 i40iw_rem_ref_cm_node(cm_node);
3175 atomic_inc(&cm_node->ref_count);
3176 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3177 i40iw_rem_ref_cm_node(cm_node);
3180 i40iw_process_packet(cm_node, rbuf);
3181 i40iw_rem_ref_cm_node(cm_node);
3185 * i40iw_setup_cm_core - allocate a top level instance of a cm
3187 * @iwdev: iwarp device structure
3189 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3191 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3193 cm_core->iwdev = iwdev;
3194 cm_core->dev = &iwdev->sc_dev;
3196 INIT_LIST_HEAD(&cm_core->connected_nodes);
3197 INIT_LIST_HEAD(&cm_core->listen_nodes);
3199 setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3200 (unsigned long)cm_core);
3202 spin_lock_init(&cm_core->ht_lock);
3203 spin_lock_init(&cm_core->listen_list_lock);
3205 cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3208 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3213 * i40iw_cleanup_cm_core - deallocate a top level instance of a
3215 * @cm_core: cm's core
3217 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3219 unsigned long flags;
3224 spin_lock_irqsave(&cm_core->ht_lock, flags);
3225 if (timer_pending(&cm_core->tcp_timer))
3226 del_timer_sync(&cm_core->tcp_timer);
3227 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3229 destroy_workqueue(cm_core->event_wq);
3230 destroy_workqueue(cm_core->disconn_wq);
3234 * i40iw_init_tcp_ctx - setup qp context
3235 * @cm_node: connection's node
3236 * @tcp_info: offload info for tcp
3237 * @iwqp: associate qp for the connection
3239 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3240 struct i40iw_tcp_offload_info *tcp_info,
3241 struct i40iw_qp *iwqp)
3243 tcp_info->ipv4 = cm_node->ipv4;
3244 tcp_info->drop_ooo_seg = true;
3245 tcp_info->wscale = true;
3246 tcp_info->ignore_tcp_opt = true;
3247 tcp_info->ignore_tcp_uns_opt = true;
3248 tcp_info->no_nagle = false;
3250 tcp_info->ttl = I40IW_DEFAULT_TTL;
3251 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3252 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3253 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3255 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3256 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3257 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3259 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3260 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3261 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3262 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3264 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3265 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3266 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3267 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3268 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3269 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3270 cm_node->tcp_cntxt.rcv_wscale);
3272 tcp_info->flow_label = 0;
3273 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3274 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3275 tcp_info->insert_vlan_tag = true;
3276 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3279 if (cm_node->ipv4) {
3280 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3281 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3283 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3284 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3286 cpu_to_le16((u16)i40iw_arp_table(
3288 &tcp_info->dest_ip_addr3,
3291 I40IW_ARP_RESOLVE));
3293 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3294 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3295 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3296 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3297 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3298 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3299 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3300 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3301 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3302 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3304 cpu_to_le16((u16)i40iw_arp_table(
3306 &tcp_info->dest_ip_addr0,
3309 I40IW_ARP_RESOLVE));
3314 * i40iw_cm_init_tsa_conn - setup qp for RTS
3315 * @iwqp: associate qp for the connection
3316 * @cm_node: connection's node
3318 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3319 struct i40iw_cm_node *cm_node)
3321 struct i40iw_tcp_offload_info tcp_info;
3322 struct i40iwarp_offload_info *iwarp_info;
3323 struct i40iw_qp_host_ctx_info *ctx_info;
3324 struct i40iw_device *iwdev = iwqp->iwdev;
3325 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3327 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3328 iwarp_info = &iwqp->iwarp_info;
3329 ctx_info = &iwqp->ctx_info;
3331 ctx_info->tcp_info = &tcp_info;
3332 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3333 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3335 iwarp_info->ord_size = cm_node->ord_size;
3336 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3338 if (iwarp_info->ord_size == 1)
3339 iwarp_info->ord_size = 2;
3341 iwarp_info->rd_enable = true;
3342 iwarp_info->rdmap_ver = 1;
3343 iwarp_info->ddp_ver = 1;
3345 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3347 ctx_info->tcp_info_valid = true;
3348 ctx_info->iwarp_info_valid = true;
3349 ctx_info->add_to_qoslist = true;
3350 ctx_info->user_pri = cm_node->user_pri;
3352 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3353 if (cm_node->snd_mark_en) {
3354 iwarp_info->snd_mark_en = true;
3355 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3356 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3359 cm_node->state = I40IW_CM_STATE_OFFLOADED;
3360 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3361 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3362 tcp_info.tos = cm_node->tos;
3364 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3366 /* once tcp_info is set, no need to do it again */
3367 ctx_info->tcp_info_valid = false;
3368 ctx_info->iwarp_info_valid = false;
3369 ctx_info->add_to_qoslist = false;
3373 * i40iw_cm_disconn - when a connection is being closed
3374 * @iwqp: associate qp for the connection
3376 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3378 struct disconn_work *work;
3379 struct i40iw_device *iwdev = iwqp->iwdev;
3380 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3381 unsigned long flags;
3383 work = kzalloc(sizeof(*work), GFP_ATOMIC);
3385 return; /* Timer will clean up */
3387 spin_lock_irqsave(&iwdev->qptable_lock, flags);
3388 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3389 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3390 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3391 "%s qp_id %d is already freed\n",
3392 __func__, iwqp->ibqp.qp_num);
3396 i40iw_add_ref(&iwqp->ibqp);
3397 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3400 INIT_WORK(&work->work, i40iw_disconnect_worker);
3401 queue_work(cm_core->disconn_wq, &work->work);
3406 * i40iw_qp_disconnect - free qp and close cm
3407 * @iwqp: associate qp for the connection
3409 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3411 struct i40iw_device *iwdev;
3412 struct i40iw_ib_device *iwibdev;
3414 iwdev = to_iwdev(iwqp->ibqp.device);
3416 i40iw_pr_err("iwdev == NULL\n");
3420 iwibdev = iwdev->iwibdev;
3422 if (iwqp->active_conn) {
3423 /* indicate this connection is NOT active */
3424 iwqp->active_conn = 0;
3426 /* Need to free the Last Streaming Mode Message */
3427 if (iwqp->ietf_mem.va) {
3429 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3430 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3434 /* close the CM node down if it is still active */
3435 if (iwqp->cm_node) {
3436 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3437 i40iw_cm_close(iwqp->cm_node);
3442 * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3443 * @iwqp: associate qp for the connection
3445 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3447 struct iw_cm_id *cm_id;
3448 struct i40iw_device *iwdev;
3449 struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3451 u8 original_hw_tcp_state;
3452 u8 original_ibqp_state;
3453 int disconn_status = 0;
3454 int issue_disconn = 0;
3455 int issue_close = 0;
3456 int issue_flush = 0;
3457 struct ib_event ibevent;
3458 unsigned long flags;
3462 i40iw_pr_err("iwqp == NULL\n");
3466 spin_lock_irqsave(&iwqp->lock, flags);
3467 cm_id = iwqp->cm_id;
3468 /* make sure we havent already closed this connection */
3470 spin_unlock_irqrestore(&iwqp->lock, flags);
3474 iwdev = to_iwdev(iwqp->ibqp.device);
3476 original_hw_tcp_state = iwqp->hw_tcp_state;
3477 original_ibqp_state = iwqp->ibqp_state;
3478 last_ae = iwqp->last_aeq;
3480 if (qp->term_flags) {
3484 /*When term timer expires after cm_timer, don't want
3485 *terminate-handler to issue cm_disconn which can re-free
3486 *a QP even after its refcnt=0.
3488 i40iw_terminate_del_timer(qp);
3489 if (!iwqp->flush_issued) {
3490 iwqp->flush_issued = 1;
3493 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3494 ((original_ibqp_state == IB_QPS_RTS) &&
3495 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3497 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3498 disconn_status = -ECONNRESET;
3501 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3502 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3503 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3504 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3508 if (!iwqp->flush_issued) {
3509 iwqp->flush_issued = 1;
3514 spin_unlock_irqrestore(&iwqp->lock, flags);
3515 if (issue_flush && !iwqp->destroyed) {
3516 /* Flush the queues */
3517 i40iw_flush_wqes(iwdev, iwqp);
3519 if (qp->term_flags && iwqp->ibqp.event_handler) {
3520 ibevent.device = iwqp->ibqp.device;
3521 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3522 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3523 ibevent.element.qp = &iwqp->ibqp;
3524 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3528 if (cm_id && cm_id->event_handler) {
3529 if (issue_disconn) {
3530 ret = i40iw_send_cm_event(NULL,
3532 IW_CM_EVENT_DISCONNECT,
3536 i40iw_debug(&iwdev->sc_dev,
3538 "disconnect event failed %s: - cm_id = %p\n",
3542 i40iw_qp_disconnect(iwqp);
3543 cm_id->provider_data = iwqp;
3544 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3546 i40iw_debug(&iwdev->sc_dev,
3548 "close event failed %s: - cm_id = %p\n",
3550 cm_id->rem_ref(cm_id);
3556 * i40iw_disconnect_worker - worker for connection close
3557 * @work: points or disconn structure
3559 static void i40iw_disconnect_worker(struct work_struct *work)
3561 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3562 struct i40iw_qp *iwqp = dwork->iwqp;
3565 i40iw_cm_disconn_true(iwqp);
3566 i40iw_rem_ref(&iwqp->ibqp);
3570 * i40iw_accept - registered call for connection to be accepted
3571 * @cm_id: cm information for passive connection
3572 * @conn_param: accpet parameters
3574 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3577 struct i40iw_qp *iwqp;
3578 struct i40iw_device *iwdev;
3579 struct i40iw_sc_dev *dev;
3580 struct i40iw_cm_node *cm_node;
3581 struct ib_qp_attr attr;
3584 struct i40iw_pd *iwpd;
3586 struct i40iw_kmem_info accept;
3587 enum i40iw_status_code status;
3590 memset(&attr, 0, sizeof(attr));
3591 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3595 iwqp = to_iwqp(ibqp);
3596 iwdev = iwqp->iwdev;
3597 dev = &iwdev->sc_dev;
3598 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3600 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3601 cm_node->ipv4 = true;
3602 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3604 cm_node->ipv4 = false;
3605 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3607 i40iw_debug(cm_node->dev,
3609 "Accept vlan_id=%d\n",
3611 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3612 if (cm_node->loopbackpartner)
3613 i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3614 i40iw_rem_ref_cm_node(cm_node);
3618 passive_state = atomic_add_return(1, &cm_node->passive_state);
3619 if (passive_state == I40IW_SEND_RESET_EVENT) {
3620 i40iw_rem_ref_cm_node(cm_node);
3624 cm_node->cm_core->stats_accepts++;
3625 iwqp->cm_node = (void *)cm_node;
3626 cm_node->iwqp = iwqp;
3628 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3630 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3634 cm_node->pdata.size = conn_param->private_data_len;
3635 accept.addr = iwqp->ietf_mem.va;
3636 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3637 memcpy(accept.addr + accept.size, conn_param->private_data,
3638 conn_param->private_data_len);
3640 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3641 if ((cm_node->ipv4 &&
3642 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3644 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3646 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3647 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3650 IB_ACCESS_LOCAL_WRITE,
3653 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3657 ibmr->pd = &iwpd->ibpd;
3658 ibmr->device = iwpd->ibpd.device;
3659 iwqp->lsmm_mr = ibmr;
3661 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3662 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3664 (accept.size + conn_param->private_data_len),
3669 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3670 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3676 iwqp->cm_id = cm_id;
3677 cm_node->cm_id = cm_id;
3679 cm_id->provider_data = (void *)iwqp;
3680 iwqp->active_conn = 0;
3682 cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3683 i40iw_cm_init_tsa_conn(iwqp, cm_node);
3684 cm_id->add_ref(cm_id);
3685 i40iw_add_ref(&iwqp->ibqp);
3687 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3689 attr.qp_state = IB_QPS_RTS;
3690 cm_node->qhash_set = false;
3691 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3692 if (cm_node->loopbackpartner) {
3693 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3695 /* copy entire MPA frame to our cm_node's frame */
3696 memcpy(cm_node->loopbackpartner->pdata_buf,
3697 conn_param->private_data,
3698 conn_param->private_data_len);
3699 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3702 cm_node->accelerated = 1;
3703 if (cm_node->accept_pend) {
3704 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3705 cm_node->accept_pend = 0;
3711 * i40iw_reject - registered call for connection to be rejected
3712 * @cm_id: cm information for passive connection
3713 * @pdata: private data to be sent
3714 * @pdata_len: private data length
3716 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3718 struct i40iw_device *iwdev;
3719 struct i40iw_cm_node *cm_node;
3720 struct i40iw_cm_node *loopback;
3722 cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3723 loopback = cm_node->loopbackpartner;
3724 cm_node->cm_id = cm_id;
3725 cm_node->pdata.size = pdata_len;
3727 iwdev = to_iwdev(cm_id->device);
3730 cm_node->cm_core->stats_rejects++;
3732 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3736 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3737 loopback->pdata.size = pdata_len;
3740 return i40iw_cm_reject(cm_node, pdata, pdata_len);
3744 * i40iw_connect - registered call for connection to be established
3745 * @cm_id: cm information for passive connection
3746 * @conn_param: Information about the connection
3748 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3751 struct i40iw_qp *iwqp;
3752 struct i40iw_device *iwdev;
3753 struct i40iw_cm_node *cm_node;
3754 struct i40iw_cm_info cm_info;
3755 struct sockaddr_in *laddr;
3756 struct sockaddr_in *raddr;
3757 struct sockaddr_in6 *laddr6;
3758 struct sockaddr_in6 *raddr6;
3760 unsigned long flags;
3762 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3765 iwqp = to_iwqp(ibqp);
3768 iwdev = to_iwdev(iwqp->ibqp.device);
3772 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3773 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3774 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3775 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3777 if (!(laddr->sin_port) || !(raddr->sin_port))
3780 iwqp->active_conn = 1;
3782 cm_id->provider_data = iwqp;
3784 /* set up the connection params for the node */
3785 if (cm_id->remote_addr.ss_family == AF_INET) {
3786 cm_info.ipv4 = true;
3787 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3788 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3789 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3790 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3791 cm_info.loc_port = ntohs(laddr->sin_port);
3792 cm_info.rem_port = ntohs(raddr->sin_port);
3793 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3795 cm_info.ipv4 = false;
3796 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3797 laddr6->sin6_addr.in6_u.u6_addr32);
3798 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3799 raddr6->sin6_addr.in6_u.u6_addr32);
3800 cm_info.loc_port = ntohs(laddr6->sin6_port);
3801 cm_info.rem_port = ntohs(raddr6->sin6_port);
3802 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3804 cm_info.cm_id = cm_id;
3805 cm_info.tos = cm_id->tos;
3806 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3807 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3808 __func__, cm_id->tos, cm_info.user_pri);
3809 cm_id->add_ref(cm_id);
3810 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3811 conn_param->private_data_len,
3812 (void *)conn_param->private_data,
3815 if (IS_ERR(cm_node)) {
3816 ret = PTR_ERR(cm_node);
3817 cm_id->rem_ref(cm_id);
3821 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3822 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3823 raddr6->sin6_addr.in6_u.u6_addr32,
3824 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3825 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3826 I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3830 cm_node->qhash_set = true;
3833 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3834 if (!test_and_set_bit(cm_info.loc_port, iwdev->cm_core.active_side_ports)) {
3835 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3836 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD)) {
3841 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3844 cm_node->apbvt_set = true;
3845 i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
3846 if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3848 cm_node->ord_size = 1;
3850 iwqp->cm_node = cm_node;
3851 cm_node->iwqp = iwqp;
3852 iwqp->cm_id = cm_id;
3853 i40iw_add_ref(&iwqp->ibqp);
3855 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3856 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3857 ret = i40iw_send_syn(cm_node, 0);
3862 i40iw_debug(cm_node->dev,
3864 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3873 i40iw_debug(&iwdev->sc_dev,
3875 "Api - connect() FAILED: dest addr=%pI4",
3878 i40iw_debug(&iwdev->sc_dev,
3880 "Api - connect() FAILED: dest addr=%pI6",
3883 i40iw_rem_ref_cm_node(cm_node);
3884 cm_id->rem_ref(cm_id);
3885 iwdev->cm_core.stats_connect_errs++;
3890 * i40iw_create_listen - registered call creating listener
3891 * @cm_id: cm information for passive connection
3892 * @backlog: to max accept pending count
3894 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3896 struct i40iw_device *iwdev;
3897 struct i40iw_cm_listener *cm_listen_node;
3898 struct i40iw_cm_info cm_info;
3899 enum i40iw_status_code ret;
3900 struct sockaddr_in *laddr;
3901 struct sockaddr_in6 *laddr6;
3902 bool wildcard = false;
3904 iwdev = to_iwdev(cm_id->device);
3908 laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3909 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3910 memset(&cm_info, 0, sizeof(cm_info));
3911 if (laddr->sin_family == AF_INET) {
3912 cm_info.ipv4 = true;
3913 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3914 cm_info.loc_port = ntohs(laddr->sin_port);
3916 if (laddr->sin_addr.s_addr != INADDR_ANY)
3917 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3922 cm_info.ipv4 = false;
3923 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3924 laddr6->sin6_addr.in6_u.u6_addr32);
3925 cm_info.loc_port = ntohs(laddr6->sin6_port);
3926 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3927 i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3932 cm_info.backlog = backlog;
3933 cm_info.cm_id = cm_id;
3935 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3936 if (!cm_listen_node) {
3937 i40iw_pr_err("cm_listen_node == NULL\n");
3941 cm_id->provider_data = cm_listen_node;
3943 cm_listen_node->tos = cm_id->tos;
3944 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3945 cm_info.user_pri = cm_listen_node->user_pri;
3947 if (!cm_listen_node->reused_node) {
3950 ret = i40iw_add_mqh_4(iwdev,
3954 ret = i40iw_add_mqh_6(iwdev,
3960 ret = i40iw_manage_apbvt(iwdev,
3962 I40IW_MANAGE_APBVT_ADD);
3967 ret = i40iw_manage_qhash(iwdev,
3969 I40IW_QHASH_TYPE_TCP_SYN,
3970 I40IW_QHASH_MANAGE_TYPE_ADD,
3975 cm_listen_node->qhash_set = true;
3976 ret = i40iw_manage_apbvt(iwdev,
3978 I40IW_MANAGE_APBVT_ADD);
3983 cm_id->add_ref(cm_id);
3984 cm_listen_node->cm_core->stats_listen_created++;
3987 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3992 * i40iw_destroy_listen - registered call to destroy listener
3993 * @cm_id: cm information for passive connection
3995 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3997 struct i40iw_device *iwdev;
3999 iwdev = to_iwdev(cm_id->device);
4000 if (cm_id->provider_data)
4001 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4003 i40iw_pr_err("cm_id->provider_data was NULL\n");
4005 cm_id->rem_ref(cm_id);
4011 * i40iw_cm_event_connected - handle connected active node
4012 * @event: the info for cm_node of connection
4014 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4016 struct i40iw_qp *iwqp;
4017 struct i40iw_device *iwdev;
4018 struct i40iw_cm_node *cm_node;
4019 struct i40iw_sc_dev *dev;
4020 struct ib_qp_attr attr;
4021 struct iw_cm_id *cm_id;
4025 cm_node = event->cm_node;
4026 cm_id = cm_node->cm_id;
4027 iwqp = (struct i40iw_qp *)cm_id->provider_data;
4028 iwdev = to_iwdev(iwqp->ibqp.device);
4029 dev = &iwdev->sc_dev;
4031 if (iwqp->destroyed) {
4032 status = -ETIMEDOUT;
4035 i40iw_cm_init_tsa_conn(iwqp, cm_node);
4036 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4038 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4039 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4042 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4044 i40iw_pr_err("send cm event\n");
4046 memset(&attr, 0, sizeof(attr));
4047 attr.qp_state = IB_QPS_RTS;
4048 cm_node->qhash_set = false;
4049 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4051 cm_node->accelerated = 1;
4057 cm_id->provider_data = NULL;
4058 i40iw_send_cm_event(event->cm_node,
4060 IW_CM_EVENT_CONNECT_REPLY,
4062 cm_id->rem_ref(cm_id);
4063 i40iw_rem_ref_cm_node(event->cm_node);
4067 * i40iw_cm_event_reset - handle reset
4068 * @event: the info for cm_node of connection
4070 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4072 struct i40iw_cm_node *cm_node = event->cm_node;
4073 struct iw_cm_id *cm_id = cm_node->cm_id;
4074 struct i40iw_qp *iwqp;
4079 iwqp = cm_id->provider_data;
4083 i40iw_debug(cm_node->dev,
4085 "reset event %p - cm_id = %p\n",
4086 event->cm_node, cm_id);
4089 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4090 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4094 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4095 * @work: pointer of cm event info.
4097 static void i40iw_cm_event_handler(struct work_struct *work)
4099 struct i40iw_cm_event *event = container_of(work,
4100 struct i40iw_cm_event,
4102 struct i40iw_cm_node *cm_node;
4104 if (!event || !event->cm_node || !event->cm_node->cm_core)
4107 cm_node = event->cm_node;
4109 switch (event->type) {
4110 case I40IW_CM_EVENT_MPA_REQ:
4111 i40iw_send_cm_event(cm_node,
4113 IW_CM_EVENT_CONNECT_REQUEST,
4116 case I40IW_CM_EVENT_RESET:
4117 i40iw_cm_event_reset(event);
4119 case I40IW_CM_EVENT_CONNECTED:
4120 if (!event->cm_node->cm_id ||
4121 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4123 i40iw_cm_event_connected(event);
4125 case I40IW_CM_EVENT_MPA_REJECT:
4126 if (!event->cm_node->cm_id ||
4127 (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4129 i40iw_send_cm_event(cm_node,
4131 IW_CM_EVENT_CONNECT_REPLY,
4134 case I40IW_CM_EVENT_ABORTED:
4135 if (!event->cm_node->cm_id ||
4136 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4138 i40iw_event_connect_error(event);
4141 i40iw_pr_err("event type = %d\n", event->type);
4145 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4146 i40iw_rem_ref_cm_node(event->cm_node);
4151 * i40iw_cm_post_event - queue event request for worker thread
4152 * @event: cm node's info for up event call
4154 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4156 atomic_inc(&event->cm_node->ref_count);
4157 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4158 INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4160 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4164 * i40iw_qhash_ctrl - enable/disable qhash for list
4165 * @iwdev: device pointer
4166 * @parent_listen_node: parent listen node
4167 * @nfo: cm info node
4168 * @ipaddr: Pointer to IPv4 or IPv6 address
4169 * @ipv4: flag indicating IPv4 when true
4170 * @ifup: flag indicating interface up when true
4172 * Enables or disables the qhash for the node in the child
4173 * listen list that matches ipaddr. If no matching IP was found
4174 * it will allocate and add a new child listen node to the
4175 * parent listen node. The listen_list_lock is assumed to be
4178 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4179 struct i40iw_cm_listener *parent_listen_node,
4180 struct i40iw_cm_info *nfo,
4181 u32 *ipaddr, bool ipv4, bool ifup)
4183 struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4184 struct i40iw_cm_listener *child_listen_node;
4185 struct list_head *pos, *tpos;
4186 enum i40iw_status_code ret;
4187 bool node_allocated = false;
4188 enum i40iw_quad_hash_manage_type op =
4189 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4191 list_for_each_safe(pos, tpos, child_listen_list) {
4194 struct i40iw_cm_listener,
4196 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4200 /* if not found then add a child listener if interface is going up */
4203 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4204 if (!child_listen_node)
4206 node_allocated = true;
4207 memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4209 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4212 memcpy(nfo->loc_addr,
4213 child_listen_node->loc_addr,
4214 sizeof(nfo->loc_addr));
4215 nfo->vlan_id = child_listen_node->vlan_id;
4216 ret = i40iw_manage_qhash(iwdev, nfo,
4217 I40IW_QHASH_TYPE_TCP_SYN,
4221 child_listen_node->qhash_set = ifup;
4223 list_add(&child_listen_node->child_listen_list,
4224 &parent_listen_node->child_listen_list);
4225 } else if (node_allocated) {
4226 kfree(child_listen_node);
4231 * i40iw_cm_disconnect_all - disconnect all connected qp's
4232 * @iwdev: device pointer
4234 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4236 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4237 struct list_head *list_core_temp;
4238 struct list_head *list_node;
4239 struct i40iw_cm_node *cm_node;
4240 unsigned long flags;
4241 struct list_head connected_list;
4242 struct ib_qp_attr attr;
4244 INIT_LIST_HEAD(&connected_list);
4245 spin_lock_irqsave(&cm_core->ht_lock, flags);
4246 list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4247 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4248 atomic_inc(&cm_node->ref_count);
4249 list_add(&cm_node->connected_entry, &connected_list);
4251 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4253 list_for_each_safe(list_node, list_core_temp, &connected_list) {
4254 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4255 attr.qp_state = IB_QPS_ERR;
4256 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4258 i40iw_cm_disconn(cm_node->iwqp);
4259 i40iw_rem_ref_cm_node(cm_node);
4264 * i40iw_ifdown_notify - process an ifdown on an interface
4265 * @iwdev: device pointer
4266 * @ipaddr: Pointer to IPv4 or IPv6 address
4267 * @ipv4: flag indicating IPv4 when true
4268 * @ifup: flag indicating interface up when true
4270 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4271 u32 *ipaddr, bool ipv4, bool ifup)
4273 struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4274 unsigned long flags;
4275 struct i40iw_cm_listener *listen_node;
4276 static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4277 struct i40iw_cm_info nfo;
4278 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4279 enum i40iw_status_code ret;
4280 enum i40iw_quad_hash_manage_type op =
4281 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4283 /* Disable or enable qhash for listeners */
4284 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4285 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4286 if (vlan_id == listen_node->vlan_id &&
4287 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4288 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4289 memcpy(nfo.loc_addr, listen_node->loc_addr,
4290 sizeof(nfo.loc_addr));
4291 nfo.loc_port = listen_node->loc_port;
4292 nfo.ipv4 = listen_node->ipv4;
4293 nfo.vlan_id = listen_node->vlan_id;
4294 nfo.user_pri = listen_node->user_pri;
4295 if (!list_empty(&listen_node->child_listen_list)) {
4296 i40iw_qhash_ctrl(iwdev,
4299 ipaddr, ipv4, ifup);
4300 } else if (memcmp(listen_node->loc_addr, ip_zero,
4302 ret = i40iw_manage_qhash(iwdev,
4304 I40IW_QHASH_TYPE_TCP_SYN,
4309 listen_node->qhash_set = ifup;
4313 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4315 /* disconnect any connected qp's on ifdown */
4317 i40iw_cm_disconnect_all(iwdev);