1/******************************************************************************* 2* 3* Copyright (c) 2015-2016 Intel Corporation. All rights reserved. 4* 5* This software is available to you under a choice of one of two 6* licenses. You may choose to be licensed under the terms of the GNU 7* General Public License (GPL) Version 2, available from the file 8* COPYING in the main directory of this source tree, or the 9* OpenFabrics.org BSD license below: 10* 11* Redistribution and use in source and binary forms, with or 12* without modification, are permitted provided that the following 13* conditions are met: 14* 15* - Redistributions of source code must retain the above 16* copyright notice, this list of conditions and the following 17* disclaimer. 18* 19* - Redistributions in binary form must reproduce the above 20* copyright notice, this list of conditions and the following 21* disclaimer in the documentation and/or other materials 22* provided with the distribution. 23* 24* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31* SOFTWARE. 32* 33*******************************************************************************/ 34 35#include <linux/atomic.h> 36#include <linux/ip.h> 37#include <linux/tcp.h> 38#include <linux/init.h> 39#include <linux/if_arp.h> 40#include <linux/if_vlan.h> 41#include <linux/notifier.h> 42#include <linux/net.h> 43#include <linux/types.h> 44#include <linux/timer.h> 45#include <linux/time.h> 46#include <linux/delay.h> 47#include <linux/etherdevice.h> 48#include <linux/netdevice.h> 49#include <linux/random.h> 50#include <linux/list.h> 51#include <linux/threads.h> 52#include <linux/highmem.h> 53#include <net/arp.h> 54#include <net/ndisc.h> 55#include <net/neighbour.h> 56#include <net/route.h> 57#include <net/addrconf.h> 58#include <net/ip6_route.h> 59#include <net/ip_fib.h> 60#include <net/secure_seq.h> 61#include <net/tcp.h> 62#include <asm/checksum.h> 63 64#include "i40iw.h" 65 66static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); 67static void i40iw_cm_post_event(struct i40iw_cm_event *event); 68static void i40iw_disconnect_worker(struct work_struct *work); 69 70/** 71 * i40iw_free_sqbuf - put back puda buffer if refcount = 0 72 * @vsi: pointer to vsi structure 73 * @buf: puda buffer to free 74 */ 75void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp) 76{ 77 struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; 78 struct i40iw_puda_rsrc *ilq = vsi->ilq; 79 80 if (!atomic_dec_return(&buf->refcount)) 81 i40iw_puda_ret_bufpool(ilq, buf); 82} 83 84/** 85 * i40iw_derive_hw_ird_setting - Calculate IRD 86 * 87 * @cm_ird: IRD of connection's node 88 * 89 * The ird from the connection is rounded to a supported HW 90 * setting (2,8,32,64) and then encoded for ird_size field of 91 * qp_ctx 92 */ 93static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) 94{ 95 u8 encoded_ird_size; 96 97 /* ird_size field is encoded in qp_ctx */ 98 switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) { 99 case I40IW_HW_IRD_SETTING_64: 100 encoded_ird_size = 3; 101 break; 102 case I40IW_HW_IRD_SETTING_32: 103 case I40IW_HW_IRD_SETTING_16: 104 encoded_ird_size = 2; 105 break; 106 case I40IW_HW_IRD_SETTING_8: 107 case I40IW_HW_IRD_SETTING_4: 108 encoded_ird_size = 1; 109 break; 110 case I40IW_HW_IRD_SETTING_2: 111 default: 112 encoded_ird_size = 0; 113 break; 114 } 115 return encoded_ird_size; 116} 117 118/** 119 * i40iw_record_ird_ord - Record IRD/ORD passed in 120 * @cm_node: connection's node 121 * @conn_ird: connection IRD 122 * @conn_ord: connection ORD 123 */ 124static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird, 125 u32 conn_ord) 126{ 127 if (conn_ird > I40IW_MAX_IRD_SIZE) 128 conn_ird = I40IW_MAX_IRD_SIZE; 129 130 if (conn_ord > I40IW_MAX_ORD_SIZE) 131 conn_ord = I40IW_MAX_ORD_SIZE; 132 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 133 conn_ord = 1; 134 135 cm_node->ird_size = conn_ird; 136 cm_node->ord_size = conn_ord; 137} 138 139/** 140 * i40iw_copy_ip_ntohl - change network to host ip 141 * @dst: host ip 142 * @src: big endian 143 */ 144void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) 145{ 146 *dst++ = ntohl(*src++); 147 *dst++ = ntohl(*src++); 148 *dst++ = ntohl(*src++); 149 *dst = ntohl(*src); 150} 151 152/** 153 * i40iw_copy_ip_htonl - change host addr to network ip 154 * @dst: host ip 155 * @src: little endian 156 */ 157static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) 158{ 159 *dst++ = htonl(*src++); 160 *dst++ = htonl(*src++); 161 *dst++ = htonl(*src++); 162 *dst = htonl(*src); 163} 164 165/** 166 * i40iw_fill_sockaddr4 - get addr info for passive connection 167 * @cm_node: connection's node 168 * @event: upper layer's cm event 169 */ 170static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, 171 struct iw_cm_event *event) 172{ 173 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 174 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 175 176 laddr->sin_family = AF_INET; 177 raddr->sin_family = AF_INET; 178 179 laddr->sin_port = htons(cm_node->loc_port); 180 raddr->sin_port = htons(cm_node->rem_port); 181 182 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 183 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 184} 185 186/** 187 * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side 188 * @cm_node: connection's node 189 * @event: upper layer's cm event 190 */ 191static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, 192 struct iw_cm_event *event) 193{ 194 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 195 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 196 197 laddr6->sin6_family = AF_INET6; 198 raddr6->sin6_family = AF_INET6; 199 200 laddr6->sin6_port = htons(cm_node->loc_port); 201 raddr6->sin6_port = htons(cm_node->rem_port); 202 203 i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, 204 cm_node->loc_addr); 205 i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, 206 cm_node->rem_addr); 207} 208 209/** 210 * i40iw_get_addr_info 211 * @cm_node: contains ip/tcp info 212 * @cm_info: to get a copy of the cm_node ip/tcp info 213*/ 214static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, 215 struct i40iw_cm_info *cm_info) 216{ 217 cm_info->ipv4 = cm_node->ipv4; 218 cm_info->vlan_id = cm_node->vlan_id; 219 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 220 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 221 cm_info->loc_port = cm_node->loc_port; 222 cm_info->rem_port = cm_node->rem_port; 223 cm_info->user_pri = cm_node->user_pri; 224} 225 226/** 227 * i40iw_get_cmevent_info - for cm event upcall 228 * @cm_node: connection's node 229 * @cm_id: upper layers cm struct for the event 230 * @event: upper layer's cm event 231 */ 232static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, 233 struct iw_cm_id *cm_id, 234 struct iw_cm_event *event) 235{ 236 memcpy(&event->local_addr, &cm_id->m_local_addr, 237 sizeof(event->local_addr)); 238 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 239 sizeof(event->remote_addr)); 240 if (cm_node) { 241 event->private_data = (void *)cm_node->pdata_buf; 242 event->private_data_len = (u8)cm_node->pdata.size; 243 event->ird = cm_node->ird_size; 244 event->ord = cm_node->ord_size; 245 } 246} 247 248/** 249 * i40iw_send_cm_event - upcall cm's event handler 250 * @cm_node: connection's node 251 * @cm_id: upper layer's cm info struct 252 * @type: Event type to indicate 253 * @status: status for the event type 254 */ 255static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, 256 struct iw_cm_id *cm_id, 257 enum iw_cm_event_type type, 258 int status) 259{ 260 struct iw_cm_event event; 261 262 memset(&event, 0, sizeof(event)); 263 event.event = type; 264 event.status = status; 265 switch (type) { 266 case IW_CM_EVENT_CONNECT_REQUEST: 267 if (cm_node->ipv4) 268 i40iw_fill_sockaddr4(cm_node, &event); 269 else 270 i40iw_fill_sockaddr6(cm_node, &event); 271 event.provider_data = (void *)cm_node; 272 event.private_data = (void *)cm_node->pdata_buf; 273 event.private_data_len = (u8)cm_node->pdata.size; 274 event.ird = cm_node->ird_size; 275 break; 276 case IW_CM_EVENT_CONNECT_REPLY: 277 i40iw_get_cmevent_info(cm_node, cm_id, &event); 278 break; 279 case IW_CM_EVENT_ESTABLISHED: 280 event.ird = cm_node->ird_size; 281 event.ord = cm_node->ord_size; 282 break; 283 case IW_CM_EVENT_DISCONNECT: 284 break; 285 case IW_CM_EVENT_CLOSE: 286 break; 287 default: 288 i40iw_pr_err("event type received type = %d\n", type); 289 return -1; 290 } 291 return cm_id->event_handler(cm_id, &event); 292} 293 294/** 295 * i40iw_create_event - create cm event 296 * @cm_node: connection's node 297 * @type: Event type to generate 298 */ 299static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, 300 enum i40iw_cm_event_type type) 301{ 302 struct i40iw_cm_event *event; 303 304 if (!cm_node->cm_id) 305 return NULL; 306 307 event = kzalloc(sizeof(*event), GFP_ATOMIC); 308 309 if (!event) 310 return NULL; 311 312 event->type = type; 313 event->cm_node = cm_node; 314 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); 315 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); 316 event->cm_info.rem_port = cm_node->rem_port; 317 event->cm_info.loc_port = cm_node->loc_port; 318 event->cm_info.cm_id = cm_node->cm_id; 319 320 i40iw_debug(cm_node->dev, 321 I40IW_DEBUG_CM, 322 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", 323 cm_node, 324 event, 325 type, 326 event->cm_info.loc_addr, 327 event->cm_info.rem_addr); 328 329 i40iw_cm_post_event(event); 330 return event; 331} 332 333/** 334 * i40iw_free_retrans_entry - free send entry 335 * @cm_node: connection's node 336 */ 337static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) 338{ 339 struct i40iw_device *iwdev = cm_node->iwdev; 340 struct i40iw_timer_entry *send_entry; 341 342 send_entry = cm_node->send_entry; 343 if (send_entry) { 344 cm_node->send_entry = NULL; 345 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf); 346 kfree(send_entry); 347 atomic_dec(&cm_node->ref_count); 348 } 349} 350 351/** 352 * i40iw_cleanup_retrans_entry - free send entry with lock 353 * @cm_node: connection's node 354 */ 355static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) 356{ 357 unsigned long flags; 358 359 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 360 i40iw_free_retrans_entry(cm_node); 361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 362} 363 364/** 365 * i40iw_form_cm_frame - get a free packet and build frame 366 * @cm_node: connection's node ionfo to use in frame 367 * @options: pointer to options info 368 * @hdr: pointer mpa header 369 * @pdata: pointer to private data 370 * @flags: indicates FIN or ACK 371 */ 372static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, 373 struct i40iw_kmem_info *options, 374 struct i40iw_kmem_info *hdr, 375 struct i40iw_kmem_info *pdata, 376 u8 flags) 377{ 378 struct i40iw_puda_buf *sqbuf; 379 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; 380 u8 *buf; 381 382 struct tcphdr *tcph; 383 struct iphdr *iph; 384 struct ipv6hdr *ip6h; 385 struct ethhdr *ethh; 386 u16 packetsize; 387 u16 eth_hlen = ETH_HLEN; 388 u32 opts_len = 0; 389 u32 pd_len = 0; 390 u32 hdr_len = 0; 391 u16 vtag; 392 393 sqbuf = i40iw_puda_get_bufpool(vsi->ilq); 394 if (!sqbuf) 395 return NULL; 396 buf = sqbuf->mem.va; 397 398 if (options) 399 opts_len = (u32)options->size; 400 401 if (hdr) 402 hdr_len = hdr->size; 403 404 if (pdata) 405 pd_len = pdata->size; 406 407 if (cm_node->vlan_id <= VLAN_VID_MASK) 408 eth_hlen += 4; 409 410 if (cm_node->ipv4) 411 packetsize = sizeof(*iph) + sizeof(*tcph); 412 else 413 packetsize = sizeof(*ip6h) + sizeof(*tcph); 414 packetsize += opts_len + hdr_len + pd_len; 415 416 memset(buf, 0x00, eth_hlen + packetsize); 417 418 sqbuf->totallen = packetsize + eth_hlen; 419 sqbuf->maclen = eth_hlen; 420 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 421 sqbuf->scratch = (void *)cm_node; 422 423 ethh = (struct ethhdr *)buf; 424 buf += eth_hlen; 425 426 if (cm_node->ipv4) { 427 sqbuf->ipv4 = true; 428 429 iph = (struct iphdr *)buf; 430 buf += sizeof(*iph); 431 tcph = (struct tcphdr *)buf; 432 buf += sizeof(*tcph); 433 434 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 435 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 436 if (cm_node->vlan_id <= VLAN_VID_MASK) { 437 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); 438 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; 439 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 440 441 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); 442 } else { 443 ethh->h_proto = htons(ETH_P_IP); 444 } 445 446 iph->version = IPVERSION; 447 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ 448 iph->tos = cm_node->tos; 449 iph->tot_len = htons(packetsize); 450 iph->id = htons(++cm_node->tcp_cntxt.loc_id); 451 452 iph->frag_off = htons(0x4000); 453 iph->ttl = 0x40; 454 iph->protocol = IPPROTO_TCP; 455 iph->saddr = htonl(cm_node->loc_addr[0]); 456 iph->daddr = htonl(cm_node->rem_addr[0]); 457 } else { 458 sqbuf->ipv4 = false; 459 ip6h = (struct ipv6hdr *)buf; 460 buf += sizeof(*ip6h); 461 tcph = (struct tcphdr *)buf; 462 buf += sizeof(*tcph); 463 464 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 465 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 466 if (cm_node->vlan_id <= VLAN_VID_MASK) { 467 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); 468 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; 469 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 470 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); 471 } else { 472 ethh->h_proto = htons(ETH_P_IPV6); 473 } 474 ip6h->version = 6; 475 ip6h->priority = cm_node->tos >> 4; 476 ip6h->flow_lbl[0] = cm_node->tos << 4; 477 ip6h->flow_lbl[1] = 0; 478 ip6h->flow_lbl[2] = 0; 479 ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); 480 ip6h->nexthdr = 6; 481 ip6h->hop_limit = 128; 482 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, 483 cm_node->loc_addr); 484 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, 485 cm_node->rem_addr); 486 } 487 488 tcph->source = htons(cm_node->loc_port); 489 tcph->dest = htons(cm_node->rem_port); 490 491 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 492 493 if (flags & SET_ACK) { 494 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 495 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 496 tcph->ack = 1; 497 } else { 498 tcph->ack_seq = 0; 499 } 500 501 if (flags & SET_SYN) { 502 cm_node->tcp_cntxt.loc_seq_num++; 503 tcph->syn = 1; 504 } else { 505 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 506 } 507 508 if (flags & SET_FIN) { 509 cm_node->tcp_cntxt.loc_seq_num++; 510 tcph->fin = 1; 511 } 512 513 if (flags & SET_RST) 514 tcph->rst = 1; 515 516 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 517 sqbuf->tcphlen = tcph->doff << 2; 518 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 519 tcph->urg_ptr = 0; 520 521 if (opts_len) { 522 memcpy(buf, options->addr, opts_len); 523 buf += opts_len; 524 } 525 526 if (hdr_len) { 527 memcpy(buf, hdr->addr, hdr_len); 528 buf += hdr_len; 529 } 530 531 if (pdata && pdata->addr) 532 memcpy(buf, pdata->addr, pdata->size); 533 534 atomic_set(&sqbuf->refcount, 1); 535 536 return sqbuf; 537} 538 539/** 540 * i40iw_send_reset - Send RST packet 541 * @cm_node: connection's node 542 */ 543int i40iw_send_reset(struct i40iw_cm_node *cm_node) 544{ 545 struct i40iw_puda_buf *sqbuf; 546 int flags = SET_RST | SET_ACK; 547 548 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); 549 if (!sqbuf) { 550 i40iw_pr_err("no sqbuf\n"); 551 return -1; 552 } 553 554 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); 555} 556 557/** 558 * i40iw_active_open_err - send event for active side cm error 559 * @cm_node: connection's node 560 * @reset: Flag to send reset or not 561 */ 562static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) 563{ 564 i40iw_cleanup_retrans_entry(cm_node); 565 cm_node->cm_core->stats_connect_errs++; 566 if (reset) { 567 i40iw_debug(cm_node->dev, 568 I40IW_DEBUG_CM, 569 "%s cm_node=%p state=%d\n", 570 __func__, 571 cm_node, 572 cm_node->state); 573 atomic_inc(&cm_node->ref_count); 574 i40iw_send_reset(cm_node); 575 } 576 577 cm_node->state = I40IW_CM_STATE_CLOSED; 578 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); 579} 580 581/** 582 * i40iw_passive_open_err - handle passive side cm error 583 * @cm_node: connection's node 584 * @reset: send reset or just free cm_node 585 */ 586static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) 587{ 588 i40iw_cleanup_retrans_entry(cm_node); 589 cm_node->cm_core->stats_passive_errs++; 590 cm_node->state = I40IW_CM_STATE_CLOSED; 591 i40iw_debug(cm_node->dev, 592 I40IW_DEBUG_CM, 593 "%s cm_node=%p state =%d\n", 594 __func__, 595 cm_node, 596 cm_node->state); 597 if (reset) 598 i40iw_send_reset(cm_node); 599 else 600 i40iw_rem_ref_cm_node(cm_node); 601} 602 603/** 604 * i40iw_event_connect_error - to create connect error event 605 * @event: cm information for connect event 606 */ 607static void i40iw_event_connect_error(struct i40iw_cm_event *event) 608{ 609 struct i40iw_qp *iwqp; 610 struct iw_cm_id *cm_id; 611 612 cm_id = event->cm_node->cm_id; 613 if (!cm_id) 614 return; 615 616 iwqp = cm_id->provider_data; 617 618 if (!iwqp || !iwqp->iwdev) 619 return; 620 621 iwqp->cm_id = NULL; 622 cm_id->provider_data = NULL; 623 i40iw_send_cm_event(event->cm_node, cm_id, 624 IW_CM_EVENT_CONNECT_REPLY, 625 -ECONNRESET); 626 cm_id->rem_ref(cm_id); 627 i40iw_rem_ref_cm_node(event->cm_node); 628} 629 630/** 631 * i40iw_process_options 632 * @cm_node: connection's node 633 * @optionsloc: point to start of options 634 * @optionsize: size of all options 635 * @syn_packet: flag if syn packet 636 */ 637static int i40iw_process_options(struct i40iw_cm_node *cm_node, 638 u8 *optionsloc, 639 u32 optionsize, 640 u32 syn_packet) 641{ 642 u32 tmp; 643 u32 offset = 0; 644 union all_known_options *all_options; 645 char got_mss_option = 0; 646 647 while (offset < optionsize) { 648 all_options = (union all_known_options *)(optionsloc + offset); 649 switch (all_options->as_base.optionnum) { 650 case OPTION_NUMBER_END: 651 offset = optionsize; 652 break; 653 case OPTION_NUMBER_NONE: 654 offset += 1; 655 continue; 656 case OPTION_NUMBER_MSS: 657 i40iw_debug(cm_node->dev, 658 I40IW_DEBUG_CM, 659 "%s: MSS Length: %d Offset: %d Size: %d\n", 660 __func__, 661 all_options->as_mss.length, 662 offset, 663 optionsize); 664 got_mss_option = 1; 665 if (all_options->as_mss.length != 4) 666 return -1; 667 tmp = ntohs(all_options->as_mss.mss); 668 if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) 669 cm_node->tcp_cntxt.mss = tmp; 670 break; 671 case OPTION_NUMBER_WINDOW_SCALE: 672 cm_node->tcp_cntxt.snd_wscale = 673 all_options->as_windowscale.shiftcount; 674 break; 675 default: 676 i40iw_debug(cm_node->dev, 677 I40IW_DEBUG_CM, 678 "TCP Option not understood: %x\n", 679 all_options->as_base.optionnum); 680 break; 681 } 682 offset += all_options->as_base.length; 683 } 684 if (!got_mss_option && syn_packet) 685 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; 686 return 0; 687} 688 689/** 690 * i40iw_handle_tcp_options - 691 * @cm_node: connection's node 692 * @tcph: pointer tcp header 693 * @optionsize: size of options rcvd 694 * @passive: active or passive flag 695 */ 696static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, 697 struct tcphdr *tcph, 698 int optionsize, 699 int passive) 700{ 701 u8 *optionsloc = (u8 *)&tcph[1]; 702 703 if (optionsize) { 704 if (i40iw_process_options(cm_node, 705 optionsloc, 706 optionsize, 707 (u32)tcph->syn)) { 708 i40iw_debug(cm_node->dev, 709 I40IW_DEBUG_CM, 710 "%s: Node %p, Sending RESET\n", 711 __func__, 712 cm_node); 713 if (passive) 714 i40iw_passive_open_err(cm_node, true); 715 else 716 i40iw_active_open_err(cm_node, true); 717 return -1; 718 } 719 } 720 721 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << 722 cm_node->tcp_cntxt.snd_wscale; 723 724 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 725 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 726 return 0; 727} 728 729/** 730 * i40iw_build_mpa_v1 - build a MPA V1 frame 731 * @cm_node: connection's node 732 * @mpa_key: to do read0 or write0 733 */ 734static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, 735 void *start_addr, 736 u8 mpa_key) 737{ 738 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; 739 740 switch (mpa_key) { 741 case MPA_KEY_REQUEST: 742 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 743 break; 744 case MPA_KEY_REPLY: 745 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 746 break; 747 default: 748 break; 749 } 750 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 751 mpa_frame->rev = cm_node->mpa_frame_rev; 752 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 753} 754 755/** 756 * i40iw_build_mpa_v2 - build a MPA V2 frame 757 * @cm_node: connection's node 758 * @start_addr: buffer start address 759 * @mpa_key: to do read0 or write0 760 */ 761static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, 762 void *start_addr, 763 u8 mpa_key) 764{ 765 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; 766 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 767 u16 ctrl_ird, ctrl_ord; 768 769 /* initialize the upper 5 bytes of the frame */ 770 i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); 771 mpa_frame->flags |= IETF_MPA_V2_FLAG; 772 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); 773 774 /* initialize RTR msg */ 775 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 776 ctrl_ird = IETF_NO_IRD_ORD; 777 ctrl_ord = IETF_NO_IRD_ORD; 778 } else { 779 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 780 IETF_NO_IRD_ORD : cm_node->ird_size; 781 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 782 IETF_NO_IRD_ORD : cm_node->ord_size; 783 } 784 785 ctrl_ird |= IETF_PEER_TO_PEER; 786 787 switch (mpa_key) { 788 case MPA_KEY_REQUEST: 789 ctrl_ord |= IETF_RDMA0_WRITE; 790 ctrl_ord |= IETF_RDMA0_READ; 791 break; 792 case MPA_KEY_REPLY: 793 switch (cm_node->send_rdma0_op) { 794 case SEND_RDMA_WRITE_ZERO: 795 ctrl_ord |= IETF_RDMA0_WRITE; 796 break; 797 case SEND_RDMA_READ_ZERO: 798 ctrl_ord |= IETF_RDMA0_READ; 799 break; 800 } 801 break; 802 default: 803 break; 804 } 805 rtr_msg->ctrl_ird = htons(ctrl_ird); 806 rtr_msg->ctrl_ord = htons(ctrl_ord); 807} 808 809/** 810 * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 811 * @cm_node: connection's node 812 * @mpa: mpa: data buffer 813 * @mpa_key: to do read0 or write0 814 */ 815static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, 816 struct i40iw_kmem_info *mpa, 817 u8 mpa_key) 818{ 819 int hdr_len = 0; 820 821 switch (cm_node->mpa_frame_rev) { 822 case IETF_MPA_V1: 823 hdr_len = sizeof(struct ietf_mpa_v1); 824 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); 825 break; 826 case IETF_MPA_V2: 827 hdr_len = sizeof(struct ietf_mpa_v2); 828 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); 829 break; 830 default: 831 break; 832 } 833 834 return hdr_len; 835} 836 837/** 838 * i40iw_send_mpa_request - active node send mpa request to passive node 839 * @cm_node: connection's node 840 */ 841static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) 842{ 843 struct i40iw_puda_buf *sqbuf; 844 845 if (!cm_node) { 846 i40iw_pr_err("cm_node == NULL\n"); 847 return -1; 848 } 849 850 cm_node->mpa_hdr.addr = &cm_node->mpa_frame; 851 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, 852 &cm_node->mpa_hdr, 853 MPA_KEY_REQUEST); 854 if (!cm_node->mpa_hdr.size) { 855 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); 856 return -1; 857 } 858 859 sqbuf = i40iw_form_cm_frame(cm_node, 860 NULL, 861 &cm_node->mpa_hdr, 862 &cm_node->pdata, 863 SET_ACK); 864 if (!sqbuf) { 865 i40iw_pr_err("sq_buf == NULL\n"); 866 return -1; 867 } 868 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); 869} 870 871/** 872 * i40iw_send_mpa_reject - 873 * @cm_node: connection's node 874 * @pdata: reject data for connection 875 * @plen: length of reject data 876 */ 877static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, 878 const void *pdata, 879 u8 plen) 880{ 881 struct i40iw_puda_buf *sqbuf; 882 struct i40iw_kmem_info priv_info; 883 884 cm_node->mpa_hdr.addr = &cm_node->mpa_frame; 885 cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, 886 &cm_node->mpa_hdr, 887 MPA_KEY_REPLY); 888 889 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; 890 priv_info.addr = (void *)pdata; 891 priv_info.size = plen; 892 893 sqbuf = i40iw_form_cm_frame(cm_node, 894 NULL, 895 &cm_node->mpa_hdr, 896 &priv_info, 897 SET_ACK | SET_FIN); 898 if (!sqbuf) { 899 i40iw_pr_err("no sqbuf\n"); 900 return -ENOMEM; 901 } 902 cm_node->state = I40IW_CM_STATE_FIN_WAIT1; 903 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); 904} 905 906/** 907 * recv_mpa - process an IETF MPA frame 908 * @cm_node: connection's node 909 * @buffer: Data pointer 910 * @type: to return accept or reject 911 * @len: Len of mpa buffer 912 */ 913static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) 914{ 915 struct ietf_mpa_v1 *mpa_frame; 916 struct ietf_mpa_v2 *mpa_v2_frame; 917 struct ietf_rtr_msg *rtr_msg; 918 int mpa_hdr_len; 919 int priv_data_len; 920 921 *type = I40IW_MPA_REQUEST_ACCEPT; 922 923 if (len < sizeof(struct ietf_mpa_v1)) { 924 i40iw_pr_err("ietf buffer small (%x)\n", len); 925 return -1; 926 } 927 928 mpa_frame = (struct ietf_mpa_v1 *)buffer; 929 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 930 priv_data_len = ntohs(mpa_frame->priv_data_len); 931 932 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 933 i40iw_pr_err("large pri_data %d\n", priv_data_len); 934 return -1; 935 } 936 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 937 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); 938 return -1; 939 } 940 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 941 i40iw_pr_err("rev %d\n", mpa_frame->rev); 942 return -1; 943 } 944 cm_node->mpa_frame_rev = mpa_frame->rev; 945 946 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { 947 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { 948 i40iw_pr_err("Unexpected MPA Key received\n"); 949 return -1; 950 } 951 } else { 952 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { 953 i40iw_pr_err("Unexpected MPA Key received\n"); 954 return -1; 955 } 956 } 957 958 if (priv_data_len + mpa_hdr_len > len) { 959 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", 960 priv_data_len, mpa_hdr_len, len); 961 return -1; 962 } 963 if (len > MAX_CM_BUFFER) { 964 i40iw_pr_err("ietf buffer large len = %d\n", len); 965 return -1; 966 } 967 968 switch (mpa_frame->rev) { 969 case IETF_MPA_V2:{ 970 u16 ird_size; 971 u16 ord_size; 972 u16 ctrl_ord; 973 u16 ctrl_ird; 974 975 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; 976 mpa_hdr_len += IETF_RTR_MSG_SIZE; 977 rtr_msg = &mpa_v2_frame->rtr_msg; 978 979 /* parse rtr message */ 980 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 981 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 982 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 983 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 984 985 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 986 return -1; 987 988 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 989 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 990 goto negotiate_done; 991 } 992 993 if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { 994 /* responder */ 995 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 996 cm_node->ird_size = 1; 997 if (cm_node->ord_size > ird_size) 998 cm_node->ord_size = ird_size; 999 } else { 1000 /* initiator */ 1001 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 1002 return -1; 1003 if (cm_node->ord_size > ird_size) 1004 cm_node->ord_size = ird_size; 1005 1006 if (cm_node->ird_size < ord_size) 1007 /* no resources available */ 1008 return -1; 1009 } 1010 1011negotiate_done: 1012 if (ctrl_ord & IETF_RDMA0_READ) 1013 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1014 else if (ctrl_ord & IETF_RDMA0_WRITE) 1015 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1016 else /* Not supported RDMA0 operation */ 1017 return -1; 1018 i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, 1019 "MPAV2: Negotiated ORD: %d, IRD: %d\n", 1020 cm_node->ord_size, cm_node->ird_size); 1021 break; 1022 } 1023 break; 1024 case IETF_MPA_V1: 1025 default: 1026 break; 1027 } 1028 1029 memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); 1030 cm_node->pdata.size = priv_data_len; 1031 1032 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1033 *type = I40IW_MPA_REQUEST_REJECT; 1034 1035 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1036 cm_node->snd_mark_en = true; 1037 1038 return 0; 1039} 1040 1041/** 1042 * i40iw_schedule_cm_timer 1043 * @@cm_node: connection's node 1044 * @sqbuf: buffer to send 1045 * @type: if it is send or close 1046 * @send_retrans: if rexmits to be done 1047 * @close_when_complete: is cm_node to be removed 1048 * 1049 * note - cm_node needs to be protected before calling this. Encase in: 1050 * i40iw_rem_ref_cm_node(cm_core, cm_node); 1051 * i40iw_schedule_cm_timer(...) 1052 * atomic_inc(&cm_node->ref_count); 1053 */ 1054int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, 1055 struct i40iw_puda_buf *sqbuf, 1056 enum i40iw_timer_type type, 1057 int send_retrans, 1058 int close_when_complete) 1059{ 1060 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; 1061 struct i40iw_cm_core *cm_core = cm_node->cm_core; 1062 struct i40iw_timer_entry *new_send; 1063 int ret = 0; 1064 u32 was_timer_set; 1065 unsigned long flags; 1066 1067 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1068 if (!new_send) { 1069 if (type != I40IW_TIMER_TYPE_CLOSE) 1070 i40iw_free_sqbuf(vsi, (void *)sqbuf); 1071 return -ENOMEM; 1072 } 1073 new_send->retrycount = I40IW_DEFAULT_RETRYS; 1074 new_send->retranscount = I40IW_DEFAULT_RETRANS; 1075 new_send->sqbuf = sqbuf; 1076 new_send->timetosend = jiffies; 1077 new_send->type = type; 1078 new_send->send_retrans = send_retrans; 1079 new_send->close_when_complete = close_when_complete; 1080 1081 if (type == I40IW_TIMER_TYPE_CLOSE) { 1082 new_send->timetosend += (HZ / 10); 1083 if (cm_node->close_entry) { 1084 kfree(new_send); 1085 i40iw_pr_err("already close entry\n"); 1086 return -EINVAL; 1087 } 1088 cm_node->close_entry = new_send; 1089 } 1090 1091 if (type == I40IW_TIMER_TYPE_SEND) { 1092 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1093 cm_node->send_entry = new_send; 1094 atomic_inc(&cm_node->ref_count); 1095 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1096 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; 1097 1098 atomic_inc(&sqbuf->refcount); 1099 i40iw_puda_send_buf(vsi->ilq, sqbuf); 1100 if (!send_retrans) { 1101 i40iw_cleanup_retrans_entry(cm_node); 1102 if (close_when_complete) 1103 i40iw_rem_ref_cm_node(cm_node); 1104 return ret; 1105 } 1106 } 1107 1108 spin_lock_irqsave(&cm_core->ht_lock, flags); 1109 was_timer_set = timer_pending(&cm_core->tcp_timer); 1110 1111 if (!was_timer_set) { 1112 cm_core->tcp_timer.expires = new_send->timetosend; 1113 add_timer(&cm_core->tcp_timer); 1114 } 1115 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1116 1117 return ret; 1118} 1119 1120/** 1121 * i40iw_retrans_expired - Could not rexmit the packet 1122 * @cm_node: connection's node 1123 */ 1124static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) 1125{ 1126 struct iw_cm_id *cm_id = cm_node->cm_id; 1127 enum i40iw_cm_node_state state = cm_node->state; 1128 1129 cm_node->state = I40IW_CM_STATE_CLOSED; 1130 switch (state) { 1131 case I40IW_CM_STATE_SYN_RCVD: 1132 case I40IW_CM_STATE_CLOSING: 1133 i40iw_rem_ref_cm_node(cm_node); 1134 break; 1135 case I40IW_CM_STATE_FIN_WAIT1: 1136 case I40IW_CM_STATE_LAST_ACK: 1137 if (cm_node->cm_id) 1138 cm_id->rem_ref(cm_id); 1139 i40iw_send_reset(cm_node); 1140 break; 1141 default: 1142 atomic_inc(&cm_node->ref_count); 1143 i40iw_send_reset(cm_node); 1144 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); 1145 break; 1146 } 1147} 1148 1149/** 1150 * i40iw_handle_close_entry - for handling retry/timeouts 1151 * @cm_node: connection's node 1152 * @rem_node: flag for remove cm_node 1153 */ 1154static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) 1155{ 1156 struct i40iw_timer_entry *close_entry = cm_node->close_entry; 1157 struct iw_cm_id *cm_id = cm_node->cm_id; 1158 struct i40iw_qp *iwqp; 1159 unsigned long flags; 1160 1161 if (!close_entry) 1162 return; 1163 iwqp = (struct i40iw_qp *)close_entry->sqbuf; 1164 if (iwqp) { 1165 spin_lock_irqsave(&iwqp->lock, flags); 1166 if (iwqp->cm_id) { 1167 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; 1168 iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; 1169 iwqp->last_aeq = I40IW_AE_RESET_SENT; 1170 iwqp->ibqp_state = IB_QPS_ERR; 1171 spin_unlock_irqrestore(&iwqp->lock, flags); 1172 i40iw_cm_disconn(iwqp); 1173 } else { 1174 spin_unlock_irqrestore(&iwqp->lock, flags); 1175 } 1176 } else if (rem_node) { 1177 /* TIME_WAIT state */ 1178 i40iw_rem_ref_cm_node(cm_node); 1179 } 1180 if (cm_id) 1181 cm_id->rem_ref(cm_id); 1182 kfree(close_entry); 1183 cm_node->close_entry = NULL; 1184} 1185 1186/** 1187 * i40iw_build_timer_list - Add cm_nodes to timer list 1188 * @timer_list: ptr to timer list 1189 * @hte: ptr to accelerated or non-accelerated list 1190 */ 1191static void i40iw_build_timer_list(struct list_head *timer_list, 1192 struct list_head *hte) 1193{ 1194 struct i40iw_cm_node *cm_node; 1195 struct list_head *list_core_temp, *list_node; 1196 1197 list_for_each_safe(list_node, list_core_temp, hte) { 1198 cm_node = container_of(list_node, struct i40iw_cm_node, list); 1199 if (cm_node->close_entry || cm_node->send_entry) { 1200 atomic_inc(&cm_node->ref_count); 1201 list_add(&cm_node->timer_entry, timer_list); 1202 } 1203 } 1204} 1205 1206/** 1207 * i40iw_cm_timer_tick - system's timer expired callback 1208 * @pass: Pointing to cm_core 1209 */ 1210static void i40iw_cm_timer_tick(struct timer_list *t) 1211{ 1212 unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; 1213 struct i40iw_cm_node *cm_node; 1214 struct i40iw_timer_entry *send_entry, *close_entry; 1215 struct list_head *list_core_temp; 1216 struct i40iw_sc_vsi *vsi; 1217 struct list_head *list_node; 1218 struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); 1219 u32 settimer = 0; 1220 unsigned long timetosend; 1221 unsigned long flags; 1222 1223 struct list_head timer_list; 1224 1225 INIT_LIST_HEAD(&timer_list); 1226 1227 spin_lock_irqsave(&cm_core->ht_lock, flags); 1228 i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list); 1229 i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list); 1230 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1231 1232 list_for_each_safe(list_node, list_core_temp, &timer_list) { 1233 cm_node = container_of(list_node, 1234 struct i40iw_cm_node, 1235 timer_entry); 1236 close_entry = cm_node->close_entry; 1237 1238 if (close_entry) { 1239 if (time_after(close_entry->timetosend, jiffies)) { 1240 if (nexttimeout > close_entry->timetosend || 1241 !settimer) { 1242 nexttimeout = close_entry->timetosend; 1243 settimer = 1; 1244 } 1245 } else { 1246 i40iw_handle_close_entry(cm_node, 1); 1247 } 1248 } 1249 1250 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1251 1252 send_entry = cm_node->send_entry; 1253 if (!send_entry) 1254 goto done; 1255 if (time_after(send_entry->timetosend, jiffies)) { 1256 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { 1257 if ((nexttimeout > send_entry->timetosend) || 1258 !settimer) { 1259 nexttimeout = send_entry->timetosend; 1260 settimer = 1; 1261 } 1262 } else { 1263 i40iw_free_retrans_entry(cm_node); 1264 } 1265 goto done; 1266 } 1267 1268 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || 1269 (cm_node->state == I40IW_CM_STATE_CLOSED)) { 1270 i40iw_free_retrans_entry(cm_node); 1271 goto done; 1272 } 1273 1274 if (!send_entry->retranscount || !send_entry->retrycount) { 1275 i40iw_free_retrans_entry(cm_node); 1276 1277 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1278 i40iw_retrans_expired(cm_node); 1279 cm_node->state = I40IW_CM_STATE_CLOSED; 1280 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1281 goto done; 1282 } 1283 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1284 1285 vsi = &cm_node->iwdev->vsi; 1286 1287 if (!cm_node->ack_rcvd) { 1288 atomic_inc(&send_entry->sqbuf->refcount); 1289 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1290 cm_node->cm_core->stats_pkt_retrans++; 1291 } 1292 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1293 if (send_entry->send_retrans) { 1294 send_entry->retranscount--; 1295 timetosend = (I40IW_RETRY_TIMEOUT << 1296 (I40IW_DEFAULT_RETRANS - 1297 send_entry->retranscount)); 1298 1299 send_entry->timetosend = jiffies + 1300 min(timetosend, I40IW_MAX_TIMEOUT); 1301 if (nexttimeout > send_entry->timetosend || !settimer) { 1302 nexttimeout = send_entry->timetosend; 1303 settimer = 1; 1304 } 1305 } else { 1306 int close_when_complete; 1307 1308 close_when_complete = send_entry->close_when_complete; 1309 i40iw_debug(cm_node->dev, 1310 I40IW_DEBUG_CM, 1311 "cm_node=%p state=%d\n", 1312 cm_node, 1313 cm_node->state); 1314 i40iw_free_retrans_entry(cm_node); 1315 if (close_when_complete) 1316 i40iw_rem_ref_cm_node(cm_node); 1317 } 1318done: 1319 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1320 i40iw_rem_ref_cm_node(cm_node); 1321 } 1322 1323 if (settimer) { 1324 spin_lock_irqsave(&cm_core->ht_lock, flags); 1325 if (!timer_pending(&cm_core->tcp_timer)) { 1326 cm_core->tcp_timer.expires = nexttimeout; 1327 add_timer(&cm_core->tcp_timer); 1328 } 1329 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1330 } 1331} 1332 1333/** 1334 * i40iw_send_syn - send SYN packet 1335 * @cm_node: connection's node 1336 * @sendack: flag to set ACK bit or not 1337 */ 1338int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) 1339{ 1340 struct i40iw_puda_buf *sqbuf; 1341 int flags = SET_SYN; 1342 char optionsbuffer[sizeof(struct option_mss) + 1343 sizeof(struct option_windowscale) + 1344 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1345 struct i40iw_kmem_info opts; 1346 1347 int optionssize = 0; 1348 /* Sending MSS option */ 1349 union all_known_options *options; 1350 1351 opts.addr = optionsbuffer; 1352 if (!cm_node) { 1353 i40iw_pr_err("no cm_node\n"); 1354 return -EINVAL; 1355 } 1356 1357 options = (union all_known_options *)&optionsbuffer[optionssize]; 1358 options->as_mss.optionnum = OPTION_NUMBER_MSS; 1359 options->as_mss.length = sizeof(struct option_mss); 1360 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); 1361 optionssize += sizeof(struct option_mss); 1362 1363 options = (union all_known_options *)&optionsbuffer[optionssize]; 1364 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; 1365 options->as_windowscale.length = sizeof(struct option_windowscale); 1366 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1367 optionssize += sizeof(struct option_windowscale); 1368 options = (union all_known_options *)&optionsbuffer[optionssize]; 1369 options->as_end = OPTION_NUMBER_END; 1370 optionssize += 1; 1371 1372 if (sendack) 1373 flags |= SET_ACK; 1374 1375 opts.size = optionssize; 1376 1377 sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); 1378 if (!sqbuf) { 1379 i40iw_pr_err("no sqbuf\n"); 1380 return -1; 1381 } 1382 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); 1383} 1384 1385/** 1386 * i40iw_send_ack - Send ACK packet 1387 * @cm_node: connection's node 1388 */ 1389static void i40iw_send_ack(struct i40iw_cm_node *cm_node) 1390{ 1391 struct i40iw_puda_buf *sqbuf; 1392 struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; 1393 1394 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); 1395 if (sqbuf) 1396 i40iw_puda_send_buf(vsi->ilq, sqbuf); 1397 else 1398 i40iw_pr_err("no sqbuf\n"); 1399} 1400 1401/** 1402 * i40iw_send_fin - Send FIN pkt 1403 * @cm_node: connection's node 1404 */ 1405static int i40iw_send_fin(struct i40iw_cm_node *cm_node) 1406{ 1407 struct i40iw_puda_buf *sqbuf; 1408 1409 sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); 1410 if (!sqbuf) { 1411 i40iw_pr_err("no sqbuf\n"); 1412 return -1; 1413 } 1414 return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); 1415} 1416 1417/** 1418 * i40iw_find_node - find a cm node that matches the reference cm node 1419 * @cm_core: cm's core 1420 * @rem_port: remote tcp port num 1421 * @rem_addr: remote ip addr 1422 * @loc_port: local tcp port num 1423 * @loc_addr: loc ip addr 1424 * @add_refcnt: flag to increment refcount of cm_node 1425 * @accelerated_list: flag for accelerated vs non-accelerated list to search 1426 */ 1427struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, 1428 u16 rem_port, 1429 u32 *rem_addr, 1430 u16 loc_port, 1431 u32 *loc_addr, 1432 bool add_refcnt, 1433 bool accelerated_list) 1434{ 1435 struct list_head *hte; 1436 struct i40iw_cm_node *cm_node; 1437 unsigned long flags; 1438 1439 hte = accelerated_list ? 1440 &cm_core->accelerated_list : &cm_core->non_accelerated_list; 1441 1442 /* walk list and find cm_node associated with this session ID */ 1443 spin_lock_irqsave(&cm_core->ht_lock, flags); 1444 list_for_each_entry(cm_node, hte, list) { 1445 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 1446 (cm_node->loc_port == loc_port) && 1447 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) && 1448 (cm_node->rem_port == rem_port)) { 1449 if (add_refcnt) 1450 atomic_inc(&cm_node->ref_count); 1451 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1452 return cm_node; 1453 } 1454 } 1455 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1456 1457 /* no owner node */ 1458 return NULL; 1459} 1460 1461/** 1462 * i40iw_find_listener - find a cm node listening on this addr-port pair 1463 * @cm_core: cm's core 1464 * @dst_port: listener tcp port num 1465 * @dst_addr: listener ip addr 1466 * @listener_state: state to match with listen node's 1467 */ 1468static struct i40iw_cm_listener *i40iw_find_listener( 1469 struct i40iw_cm_core *cm_core, 1470 u32 *dst_addr, 1471 u16 dst_port, 1472 u16 vlan_id, 1473 enum i40iw_cm_listener_state 1474 listener_state) 1475{ 1476 struct i40iw_cm_listener *listen_node; 1477 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 1478 u32 listen_addr[4]; 1479 u16 listen_port; 1480 unsigned long flags; 1481 1482 /* walk list and find cm_node associated with this session ID */ 1483 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1484 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { 1485 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1486 listen_port = listen_node->loc_port; 1487 /* compare node pair, return node handle if a match */ 1488 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || 1489 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && 1490 (listen_port == dst_port) && 1491 (listener_state & listen_node->listener_state)) { 1492 atomic_inc(&listen_node->ref_count); 1493 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1494 return listen_node; 1495 } 1496 } 1497 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1498 return NULL; 1499} 1500 1501/** 1502 * i40iw_add_hte_node - add a cm node to the hash table 1503 * @cm_core: cm's core 1504 * @cm_node: connection's node 1505 */ 1506static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, 1507 struct i40iw_cm_node *cm_node) 1508{ 1509 unsigned long flags; 1510 1511 if (!cm_node || !cm_core) { 1512 i40iw_pr_err("cm_node or cm_core == NULL\n"); 1513 return; 1514 } 1515 1516 spin_lock_irqsave(&cm_core->ht_lock, flags); 1517 list_add_tail(&cm_node->list, &cm_core->non_accelerated_list); 1518 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1519} 1520 1521/** 1522 * i40iw_find_port - find port that matches reference port 1523 * @hte: ptr to accelerated or non-accelerated list 1524 * @accelerated_list: flag for accelerated vs non-accelerated list 1525 */ 1526static bool i40iw_find_port(struct list_head *hte, u16 port) 1527{ 1528 struct i40iw_cm_node *cm_node; 1529 1530 list_for_each_entry(cm_node, hte, list) { 1531 if (cm_node->loc_port == port) 1532 return true; 1533 } 1534 return false; 1535} 1536 1537/** 1538 * i40iw_port_in_use - determine if port is in use 1539 * @cm_core: cm's core 1540 * @port: port number 1541 */ 1542bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port) 1543{ 1544 struct i40iw_cm_listener *listen_node; 1545 unsigned long flags; 1546 1547 spin_lock_irqsave(&cm_core->ht_lock, flags); 1548 if (i40iw_find_port(&cm_core->accelerated_list, port) || 1549 i40iw_find_port(&cm_core->non_accelerated_list, port)) { 1550 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1551 return true; 1552 } 1553 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1554 1555 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1556 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { 1557 if (listen_node->loc_port == port) { 1558 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1559 return true; 1560 } 1561 } 1562 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1563 1564 return false; 1565} 1566 1567/** 1568 * i40iw_del_multiple_qhash - Remove qhash and child listens 1569 * @iwdev: iWarp device 1570 * @cm_info: CM info for parent listen node 1571 * @cm_parent_listen_node: The parent listen node 1572 */ 1573static enum i40iw_status_code i40iw_del_multiple_qhash( 1574 struct i40iw_device *iwdev, 1575 struct i40iw_cm_info *cm_info, 1576 struct i40iw_cm_listener *cm_parent_listen_node) 1577{ 1578 struct i40iw_cm_listener *child_listen_node; 1579 enum i40iw_status_code ret = I40IW_ERR_CONFIG; 1580 struct list_head *pos, *tpos; 1581 unsigned long flags; 1582 1583 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1584 list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { 1585 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); 1586 if (child_listen_node->ipv4) 1587 i40iw_debug(&iwdev->sc_dev, 1588 I40IW_DEBUG_CM, 1589 "removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1590 child_listen_node->loc_addr, 1591 child_listen_node->loc_port, 1592 child_listen_node->vlan_id); 1593 else 1594 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, 1595 "removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1596 child_listen_node->loc_addr, 1597 child_listen_node->loc_port, 1598 child_listen_node->vlan_id); 1599 list_del(pos); 1600 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1601 sizeof(cm_info->loc_addr)); 1602 cm_info->vlan_id = child_listen_node->vlan_id; 1603 if (child_listen_node->qhash_set) { 1604 ret = i40iw_manage_qhash(iwdev, cm_info, 1605 I40IW_QHASH_TYPE_TCP_SYN, 1606 I40IW_QHASH_MANAGE_TYPE_DELETE, 1607 NULL, false); 1608 child_listen_node->qhash_set = false; 1609 } else { 1610 ret = I40IW_SUCCESS; 1611 } 1612 i40iw_debug(&iwdev->sc_dev, 1613 I40IW_DEBUG_CM, 1614 "freed pointer = %p\n", 1615 child_listen_node); 1616 kfree(child_listen_node); 1617 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1618 } 1619 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1620 1621 return ret; 1622} 1623 1624/** 1625 * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan 1626 * @addr: local IPv6 address 1627 * @vlan_id: vlan id for the given IPv6 address 1628 * 1629 * Returns the net_device of the IPv6 address and also sets the 1630 * vlan id for that address. 1631 */ 1632static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id) 1633{ 1634 struct net_device *ip_dev = NULL; 1635 struct in6_addr laddr6; 1636 1637 if (!IS_ENABLED(CONFIG_IPV6)) 1638 return NULL; 1639 i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1640 if (vlan_id) 1641 *vlan_id = I40IW_NO_VLAN; 1642 rcu_read_lock(); 1643 for_each_netdev_rcu(&init_net, ip_dev) { 1644 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1645 if (vlan_id) 1646 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1647 break; 1648 } 1649 } 1650 rcu_read_unlock(); 1651 return ip_dev; 1652} 1653 1654/** 1655 * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1656 * @addr: local IPv4 address 1657 */ 1658static u16 i40iw_get_vlan_ipv4(u32 *addr) 1659{ 1660 struct net_device *netdev; 1661 u16 vlan_id = I40IW_NO_VLAN; 1662 1663 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1664 if (netdev) { 1665 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1666 dev_put(netdev); 1667 } 1668 return vlan_id; 1669} 1670 1671/** 1672 * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 1673 * @iwdev: iWarp device 1674 * @cm_info: CM info for parent listen node 1675 * @cm_parent_listen_node: The parent listen node 1676 * 1677 * Adds a qhash and a child listen node for every IPv6 address 1678 * on the adapter and adds the associated qhash filter 1679 */ 1680static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, 1681 struct i40iw_cm_info *cm_info, 1682 struct i40iw_cm_listener *cm_parent_listen_node) 1683{ 1684 struct net_device *ip_dev; 1685 struct inet6_dev *idev; 1686 struct inet6_ifaddr *ifp, *tmp; 1687 enum i40iw_status_code ret = 0; 1688 struct i40iw_cm_listener *child_listen_node; 1689 unsigned long flags; 1690 1691 rtnl_lock(); 1692 for_each_netdev(&init_net, ip_dev) { 1693 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && 1694 (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || 1695 (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { 1696 idev = __in6_dev_get(ip_dev); 1697 if (!idev) { 1698 i40iw_pr_err("idev == NULL\n"); 1699 break; 1700 } 1701 list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { 1702 i40iw_debug(&iwdev->sc_dev, 1703 I40IW_DEBUG_CM, 1704 "IP=%pI6, vlan_id=%d, MAC=%pM\n", 1705 &ifp->addr, 1706 rdma_vlan_dev_vlan_id(ip_dev), 1707 ip_dev->dev_addr); 1708 child_listen_node = 1709 kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); 1710 i40iw_debug(&iwdev->sc_dev, 1711 I40IW_DEBUG_CM, 1712 "Allocating child listener %p\n", 1713 child_listen_node); 1714 if (!child_listen_node) { 1715 ret = I40IW_ERR_NO_MEMORY; 1716 goto exit; 1717 } 1718 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1719 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1720 1721 memcpy(child_listen_node, cm_parent_listen_node, 1722 sizeof(*child_listen_node)); 1723 1724 i40iw_copy_ip_ntohl(child_listen_node->loc_addr, 1725 ifp->addr.in6_u.u6_addr32); 1726 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1727 sizeof(cm_info->loc_addr)); 1728 1729 ret = i40iw_manage_qhash(iwdev, cm_info, 1730 I40IW_QHASH_TYPE_TCP_SYN, 1731 I40IW_QHASH_MANAGE_TYPE_ADD, 1732 NULL, true); 1733 if (!ret) { 1734 child_listen_node->qhash_set = true; 1735 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1736 list_add(&child_listen_node->child_listen_list, 1737 &cm_parent_listen_node->child_listen_list); 1738 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1739 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1740 } else { 1741 kfree(child_listen_node); 1742 } 1743 } 1744 } 1745 } 1746exit: 1747 rtnl_unlock(); 1748 return ret; 1749} 1750 1751/** 1752 * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 1753 * @iwdev: iWarp device 1754 * @cm_info: CM info for parent listen node 1755 * @cm_parent_listen_node: The parent listen node 1756 * 1757 * Adds a qhash and a child listen node for every IPv4 address 1758 * on the adapter and adds the associated qhash filter 1759 */ 1760static enum i40iw_status_code i40iw_add_mqh_4( 1761 struct i40iw_device *iwdev, 1762 struct i40iw_cm_info *cm_info, 1763 struct i40iw_cm_listener *cm_parent_listen_node) 1764{ 1765 struct net_device *dev; 1766 struct in_device *idev; 1767 struct i40iw_cm_listener *child_listen_node; 1768 enum i40iw_status_code ret = 0; 1769 unsigned long flags; 1770 1771 rtnl_lock(); 1772 for_each_netdev(&init_net, dev) { 1773 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && 1774 (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || 1775 (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { 1776 const struct in_ifaddr *ifa; 1777 1778 idev = in_dev_get(dev); 1779 1780 in_dev_for_each_ifa_rtnl(ifa, idev) { 1781 i40iw_debug(&iwdev->sc_dev, 1782 I40IW_DEBUG_CM, 1783 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1784 &ifa->ifa_address, 1785 rdma_vlan_dev_vlan_id(dev), 1786 dev->dev_addr); 1787 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1788 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1789 i40iw_debug(&iwdev->sc_dev, 1790 I40IW_DEBUG_CM, 1791 "Allocating child listener %p\n", 1792 child_listen_node); 1793 if (!child_listen_node) { 1794 in_dev_put(idev); 1795 ret = I40IW_ERR_NO_MEMORY; 1796 goto exit; 1797 } 1798 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); 1799 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1800 memcpy(child_listen_node, 1801 cm_parent_listen_node, 1802 sizeof(*child_listen_node)); 1803 1804 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); 1805 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1806 sizeof(cm_info->loc_addr)); 1807 1808 ret = i40iw_manage_qhash(iwdev, 1809 cm_info, 1810 I40IW_QHASH_TYPE_TCP_SYN, 1811 I40IW_QHASH_MANAGE_TYPE_ADD, 1812 NULL, 1813 true); 1814 if (!ret) { 1815 child_listen_node->qhash_set = true; 1816 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1817 list_add(&child_listen_node->child_listen_list, 1818 &cm_parent_listen_node->child_listen_list); 1819 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1820 } else { 1821 kfree(child_listen_node); 1822 cm_parent_listen_node->cm_core->stats_listen_nodes_created--; 1823 } 1824 } 1825 1826 in_dev_put(idev); 1827 } 1828 } 1829exit: 1830 rtnl_unlock(); 1831 return ret; 1832} 1833 1834/** 1835 * i40iw_dec_refcnt_listen - delete listener and associated cm nodes 1836 * @cm_core: cm's core 1837 * @free_hanging_nodes: to free associated cm_nodes 1838 * @apbvt_del: flag to delete the apbvt 1839 */ 1840static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, 1841 struct i40iw_cm_listener *listener, 1842 int free_hanging_nodes, bool apbvt_del) 1843{ 1844 int ret = -EINVAL; 1845 int err = 0; 1846 struct list_head *list_pos; 1847 struct list_head *list_temp; 1848 struct i40iw_cm_node *cm_node; 1849 struct list_head reset_list; 1850 struct i40iw_cm_info nfo; 1851 struct i40iw_cm_node *loopback; 1852 enum i40iw_cm_node_state old_state; 1853 unsigned long flags; 1854 1855 /* free non-accelerated child nodes for this listener */ 1856 INIT_LIST_HEAD(&reset_list); 1857 if (free_hanging_nodes) { 1858 spin_lock_irqsave(&cm_core->ht_lock, flags); 1859 list_for_each_safe(list_pos, 1860 list_temp, &cm_core->non_accelerated_list) { 1861 cm_node = container_of(list_pos, struct i40iw_cm_node, list); 1862 if ((cm_node->listener == listener) && 1863 !cm_node->accelerated) { 1864 atomic_inc(&cm_node->ref_count); 1865 list_add(&cm_node->reset_entry, &reset_list); 1866 } 1867 } 1868 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1869 } 1870 1871 list_for_each_safe(list_pos, list_temp, &reset_list) { 1872 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); 1873 loopback = cm_node->loopbackpartner; 1874 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { 1875 i40iw_rem_ref_cm_node(cm_node); 1876 } else { 1877 if (!loopback) { 1878 i40iw_cleanup_retrans_entry(cm_node); 1879 err = i40iw_send_reset(cm_node); 1880 if (err) { 1881 cm_node->state = I40IW_CM_STATE_CLOSED; 1882 i40iw_pr_err("send reset\n"); 1883 } else { 1884 old_state = cm_node->state; 1885 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; 1886 if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) 1887 i40iw_rem_ref_cm_node(cm_node); 1888 } 1889 } else { 1890 struct i40iw_cm_event event; 1891 1892 event.cm_node = loopback; 1893 memcpy(event.cm_info.rem_addr, 1894 loopback->rem_addr, sizeof(event.cm_info.rem_addr)); 1895 memcpy(event.cm_info.loc_addr, 1896 loopback->loc_addr, sizeof(event.cm_info.loc_addr)); 1897 event.cm_info.rem_port = loopback->rem_port; 1898 event.cm_info.loc_port = loopback->loc_port; 1899 event.cm_info.cm_id = loopback->cm_id; 1900 event.cm_info.ipv4 = loopback->ipv4; 1901 atomic_inc(&loopback->ref_count); 1902 loopback->state = I40IW_CM_STATE_CLOSED; 1903 i40iw_event_connect_error(&event); 1904 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; 1905 i40iw_rem_ref_cm_node(cm_node); 1906 } 1907 } 1908 } 1909 1910 if (!atomic_dec_return(&listener->ref_count)) { 1911 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1912 list_del(&listener->list); 1913 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1914 1915 if (listener->iwdev) { 1916 if (apbvt_del) 1917 i40iw_manage_apbvt(listener->iwdev, 1918 listener->loc_port, 1919 I40IW_MANAGE_APBVT_DEL); 1920 1921 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1922 nfo.loc_port = listener->loc_port; 1923 nfo.ipv4 = listener->ipv4; 1924 nfo.vlan_id = listener->vlan_id; 1925 nfo.user_pri = listener->user_pri; 1926 1927 if (!list_empty(&listener->child_listen_list)) { 1928 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); 1929 } else { 1930 if (listener->qhash_set) 1931 i40iw_manage_qhash(listener->iwdev, 1932 &nfo, 1933 I40IW_QHASH_TYPE_TCP_SYN, 1934 I40IW_QHASH_MANAGE_TYPE_DELETE, 1935 NULL, 1936 false); 1937 } 1938 } 1939 1940 cm_core->stats_listen_destroyed++; 1941 kfree(listener); 1942 cm_core->stats_listen_nodes_destroyed++; 1943 listener = NULL; 1944 ret = 0; 1945 } 1946 1947 if (listener) { 1948 if (atomic_read(&listener->pend_accepts_cnt) > 0) 1949 i40iw_debug(cm_core->dev, 1950 I40IW_DEBUG_CM, 1951 "%s: listener (%p) pending accepts=%u\n", 1952 __func__, 1953 listener, 1954 atomic_read(&listener->pend_accepts_cnt)); 1955 } 1956 1957 return ret; 1958} 1959 1960/** 1961 * i40iw_cm_del_listen - delete a linstener 1962 * @cm_core: cm's core 1963 * @listener: passive connection's listener 1964 * @apbvt_del: flag to delete apbvt 1965 */ 1966static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, 1967 struct i40iw_cm_listener *listener, 1968 bool apbvt_del) 1969{ 1970 listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; 1971 listener->cm_id = NULL; /* going to be destroyed pretty soon */ 1972 return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1973} 1974 1975/** 1976 * i40iw_addr_resolve_neigh - resolve neighbor address 1977 * @iwdev: iwarp device structure 1978 * @src_ip: local ip address 1979 * @dst_ip: remote ip address 1980 * @arpindex: if there is an arp entry 1981 */ 1982static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, 1983 u32 src_ip, 1984 u32 dst_ip, 1985 int arpindex) 1986{ 1987 struct rtable *rt; 1988 struct neighbour *neigh; 1989 int rc = arpindex; 1990 __be32 dst_ipaddr = htonl(dst_ip); 1991 __be32 src_ipaddr = htonl(src_ip); 1992 1993 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); 1994 if (IS_ERR(rt)) { 1995 i40iw_pr_err("ip_route_output\n"); 1996 return rc; 1997 } 1998 1999 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 2000 2001 rcu_read_lock(); 2002 if (neigh) { 2003 if (neigh->nud_state & NUD_VALID) { 2004 if (arpindex >= 0) { 2005 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, 2006 neigh->ha)) 2007 /* Mac address same as arp table */ 2008 goto resolve_neigh_exit; 2009 i40iw_manage_arp_cache(iwdev, 2010 iwdev->arp_table[arpindex].mac_addr, 2011 &dst_ip, 2012 true, 2013 I40IW_ARP_DELETE); 2014 } 2015 2016 i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); 2017 rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); 2018 } else { 2019 neigh_event_send(neigh, NULL); 2020 } 2021 } 2022 resolve_neigh_exit: 2023 2024 rcu_read_unlock(); 2025 if (neigh) 2026 neigh_release(neigh); 2027 2028 ip_rt_put(rt); 2029 return rc; 2030} 2031 2032/** 2033 * i40iw_get_dst_ipv6 2034 */ 2035static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, 2036 struct sockaddr_in6 *dst_addr) 2037{ 2038 struct dst_entry *dst; 2039 struct flowi6 fl6; 2040 2041 memset(&fl6, 0, sizeof(fl6)); 2042 fl6.daddr = dst_addr->sin6_addr; 2043 fl6.saddr = src_addr->sin6_addr; 2044 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 2045 fl6.flowi6_oif = dst_addr->sin6_scope_id; 2046 2047 dst = ip6_route_output(&init_net, NULL, &fl6); 2048 return dst; 2049} 2050 2051/** 2052 * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 2053 * @iwdev: iwarp device structure 2054 * @dst_ip: remote ip address 2055 * @arpindex: if there is an arp entry 2056 */ 2057static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, 2058 u32 *src, 2059 u32 *dest, 2060 int arpindex) 2061{ 2062 struct neighbour *neigh; 2063 int rc = arpindex; 2064 struct dst_entry *dst; 2065 struct sockaddr_in6 dst_addr; 2066 struct sockaddr_in6 src_addr; 2067 2068 memset(&dst_addr, 0, sizeof(dst_addr)); 2069 dst_addr.sin6_family = AF_INET6; 2070 i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2071 memset(&src_addr, 0, sizeof(src_addr)); 2072 src_addr.sin6_family = AF_INET6; 2073 i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2074 dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); 2075 if (!dst || dst->error) { 2076 if (dst) { 2077 i40iw_pr_err("ip6_route_output returned dst->error = %d\n", 2078 dst->error); 2079 dst_release(dst); 2080 } 2081 return rc; 2082 } 2083 2084 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2085 2086 rcu_read_lock(); 2087 if (neigh) { 2088 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); 2089 if (neigh->nud_state & NUD_VALID) { 2090 if (arpindex >= 0) { 2091 if (ether_addr_equal 2092 (iwdev->arp_table[arpindex].mac_addr, 2093 neigh->ha)) { 2094 /* Mac address same as in arp table */ 2095 goto resolve_neigh_exit6; 2096 } 2097 i40iw_manage_arp_cache(iwdev, 2098 iwdev->arp_table[arpindex].mac_addr, 2099 dest, 2100 false, 2101 I40IW_ARP_DELETE); 2102 } 2103 i40iw_manage_arp_cache(iwdev, 2104 neigh->ha, 2105 dest, 2106 false, 2107 I40IW_ARP_ADD); 2108 rc = i40iw_arp_table(iwdev, 2109 dest, 2110 false, 2111 NULL, 2112 I40IW_ARP_RESOLVE); 2113 } else { 2114 neigh_event_send(neigh, NULL); 2115 } 2116 } 2117 2118 resolve_neigh_exit6: 2119 rcu_read_unlock(); 2120 if (neigh) 2121 neigh_release(neigh); 2122 dst_release(dst); 2123 return rc; 2124} 2125 2126/** 2127 * i40iw_ipv4_is_loopback - check if loopback 2128 * @loc_addr: local addr to compare 2129 * @rem_addr: remote address 2130 */ 2131static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) 2132{ 2133 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2134} 2135 2136/** 2137 * i40iw_ipv6_is_loopback - check if loopback 2138 * @loc_addr: local addr to compare 2139 * @rem_addr: remote address 2140 */ 2141static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) 2142{ 2143 struct in6_addr raddr6; 2144 2145 i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2146 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2147} 2148 2149/** 2150 * i40iw_make_cm_node - create a new instance of a cm node 2151 * @cm_core: cm's core 2152 * @iwdev: iwarp device structure 2153 * @cm_info: quad info for connection 2154 * @listener: passive connection's listener 2155 */ 2156static struct i40iw_cm_node *i40iw_make_cm_node( 2157 struct i40iw_cm_core *cm_core, 2158 struct i40iw_device *iwdev, 2159 struct i40iw_cm_info *cm_info, 2160 struct i40iw_cm_listener *listener) 2161{ 2162 struct i40iw_cm_node *cm_node; 2163 int oldarpindex; 2164 int arpindex; 2165 struct net_device *netdev = iwdev->netdev; 2166 2167 /* create an hte and cm_node for this instance */ 2168 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2169 if (!cm_node) 2170 return NULL; 2171 2172 /* set our node specific transport info */ 2173 cm_node->ipv4 = cm_info->ipv4; 2174 cm_node->vlan_id = cm_info->vlan_id; 2175 if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb) 2176 cm_node->vlan_id = 0; 2177 cm_node->tos = cm_info->tos; 2178 cm_node->user_pri = cm_info->user_pri; 2179 if (listener) { 2180 if (listener->tos != cm_info->tos) 2181 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, 2182 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2183 listener->tos, cm_info->tos); 2184 cm_node->tos = max(listener->tos, cm_info->tos); 2185 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2186 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n", 2187 cm_node->tos, cm_node->user_pri); 2188 } 2189 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2190 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2191 cm_node->loc_port = cm_info->loc_port; 2192 cm_node->rem_port = cm_info->rem_port; 2193 2194 cm_node->mpa_frame_rev = iwdev->mpa_version; 2195 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2196 cm_node->ird_size = I40IW_MAX_IRD_SIZE; 2197 cm_node->ord_size = I40IW_MAX_ORD_SIZE; 2198 2199 cm_node->listener = listener; 2200 cm_node->cm_id = cm_info->cm_id; 2201 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2202 spin_lock_init(&cm_node->retrans_list_lock); 2203 cm_node->ack_rcvd = false; 2204 2205 atomic_set(&cm_node->ref_count, 1); 2206 /* associate our parent CM core */ 2207 cm_node->cm_core = cm_core; 2208 cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; 2209 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; 2210 cm_node->tcp_cntxt.rcv_wnd = 2211 I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; 2212 if (cm_node->ipv4) { 2213 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2214 htonl(cm_node->rem_addr[0]), 2215 htons(cm_node->loc_port), 2216 htons(cm_node->rem_port)); 2217 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4; 2218 } else if (IS_ENABLED(CONFIG_IPV6)) { 2219 __be32 loc[4] = { 2220 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2221 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2222 }; 2223 __be32 rem[4] = { 2224 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2225 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2226 }; 2227 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2228 htons(cm_node->loc_port), 2229 htons(cm_node->rem_port)); 2230 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6; 2231 } 2232 2233 cm_node->iwdev = iwdev; 2234 cm_node->dev = &iwdev->sc_dev; 2235 2236 if ((cm_node->ipv4 && 2237 i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2238 (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, 2239 cm_node->rem_addr))) { 2240 arpindex = i40iw_arp_table(iwdev, 2241 cm_node->rem_addr, 2242 false, 2243 NULL, 2244 I40IW_ARP_RESOLVE); 2245 } else { 2246 oldarpindex = i40iw_arp_table(iwdev, 2247 cm_node->rem_addr, 2248 false, 2249 NULL, 2250 I40IW_ARP_RESOLVE); 2251 if (cm_node->ipv4) 2252 arpindex = i40iw_addr_resolve_neigh(iwdev, 2253 cm_info->loc_addr[0], 2254 cm_info->rem_addr[0], 2255 oldarpindex); 2256 else if (IS_ENABLED(CONFIG_IPV6)) 2257 arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, 2258 cm_info->loc_addr, 2259 cm_info->rem_addr, 2260 oldarpindex); 2261 else 2262 arpindex = -EINVAL; 2263 } 2264 if (arpindex < 0) { 2265 i40iw_pr_err("cm_node arpindex\n"); 2266 kfree(cm_node); 2267 return NULL; 2268 } 2269 ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); 2270 i40iw_add_hte_node(cm_core, cm_node); 2271 cm_core->stats_nodes_created++; 2272 return cm_node; 2273} 2274 2275/** 2276 * i40iw_rem_ref_cm_node - destroy an instance of a cm node 2277 * @cm_node: connection's node 2278 */ 2279static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) 2280{ 2281 struct i40iw_cm_core *cm_core = cm_node->cm_core; 2282 struct i40iw_qp *iwqp; 2283 struct i40iw_cm_info nfo; 2284 unsigned long flags; 2285 2286 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); 2287 if (atomic_dec_return(&cm_node->ref_count)) { 2288 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); 2289 return; 2290 } 2291 list_del(&cm_node->list); 2292 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); 2293 2294 /* if the node is destroyed before connection was accelerated */ 2295 if (!cm_node->accelerated && cm_node->accept_pend) { 2296 pr_err("node destroyed before established\n"); 2297 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2298 } 2299 if (cm_node->close_entry) 2300 i40iw_handle_close_entry(cm_node, 0); 2301 if (cm_node->listener) { 2302 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2303 } else { 2304 if (cm_node->apbvt_set) { 2305 i40iw_manage_apbvt(cm_node->iwdev, 2306 cm_node->loc_port, 2307 I40IW_MANAGE_APBVT_DEL); 2308 cm_node->apbvt_set = 0; 2309 } 2310 i40iw_get_addr_info(cm_node, &nfo); 2311 if (cm_node->qhash_set) { 2312 i40iw_manage_qhash(cm_node->iwdev, 2313 &nfo, 2314 I40IW_QHASH_TYPE_TCP_ESTABLISHED, 2315 I40IW_QHASH_MANAGE_TYPE_DELETE, 2316 NULL, 2317 false); 2318 cm_node->qhash_set = 0; 2319 } 2320 } 2321 2322 iwqp = cm_node->iwqp; 2323 if (iwqp) { 2324 iwqp->cm_node = NULL; 2325 i40iw_qp_rem_ref(&iwqp->ibqp); 2326 cm_node->iwqp = NULL; 2327 } else if (cm_node->qhash_set) { 2328 i40iw_get_addr_info(cm_node, &nfo); 2329 i40iw_manage_qhash(cm_node->iwdev, 2330 &nfo, 2331 I40IW_QHASH_TYPE_TCP_ESTABLISHED, 2332 I40IW_QHASH_MANAGE_TYPE_DELETE, 2333 NULL, 2334 false); 2335 cm_node->qhash_set = 0; 2336 } 2337 2338 cm_node->cm_core->stats_nodes_destroyed++; 2339 kfree(cm_node); 2340} 2341 2342/** 2343 * i40iw_handle_fin_pkt - FIN packet received 2344 * @cm_node: connection's node 2345 */ 2346static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) 2347{ 2348 u32 ret; 2349 2350 switch (cm_node->state) { 2351 case I40IW_CM_STATE_SYN_RCVD: 2352 case I40IW_CM_STATE_SYN_SENT: 2353 case I40IW_CM_STATE_ESTABLISHED: 2354 case I40IW_CM_STATE_MPAREJ_RCVD: 2355 cm_node->tcp_cntxt.rcv_nxt++; 2356 i40iw_cleanup_retrans_entry(cm_node); 2357 cm_node->state = I40IW_CM_STATE_LAST_ACK; 2358 i40iw_send_fin(cm_node); 2359 break; 2360 case I40IW_CM_STATE_MPAREQ_SENT: 2361 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); 2362 cm_node->tcp_cntxt.rcv_nxt++; 2363 i40iw_cleanup_retrans_entry(cm_node); 2364 cm_node->state = I40IW_CM_STATE_CLOSED; 2365 atomic_inc(&cm_node->ref_count); 2366 i40iw_send_reset(cm_node); 2367 break; 2368 case I40IW_CM_STATE_FIN_WAIT1: 2369 cm_node->tcp_cntxt.rcv_nxt++; 2370 i40iw_cleanup_retrans_entry(cm_node); 2371 cm_node->state = I40IW_CM_STATE_CLOSING; 2372 i40iw_send_ack(cm_node); 2373 /* 2374 * Wait for ACK as this is simultaneous close. 2375 * After we receive ACK, do not send anything. 2376 * Just rm the node. 2377 */ 2378 break; 2379 case I40IW_CM_STATE_FIN_WAIT2: 2380 cm_node->tcp_cntxt.rcv_nxt++; 2381 i40iw_cleanup_retrans_entry(cm_node); 2382 cm_node->state = I40IW_CM_STATE_TIME_WAIT; 2383 i40iw_send_ack(cm_node); 2384 ret = 2385 i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); 2386 if (ret) 2387 i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); 2388 break; 2389 case I40IW_CM_STATE_TIME_WAIT: 2390 cm_node->tcp_cntxt.rcv_nxt++; 2391 i40iw_cleanup_retrans_entry(cm_node); 2392 cm_node->state = I40IW_CM_STATE_CLOSED; 2393 i40iw_rem_ref_cm_node(cm_node); 2394 break; 2395 case I40IW_CM_STATE_OFFLOADED: 2396 default: 2397 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); 2398 break; 2399 } 2400} 2401 2402/** 2403 * i40iw_handle_rst_pkt - process received RST packet 2404 * @cm_node: connection's node 2405 * @rbuf: receive buffer 2406 */ 2407static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, 2408 struct i40iw_puda_buf *rbuf) 2409{ 2410 i40iw_cleanup_retrans_entry(cm_node); 2411 switch (cm_node->state) { 2412 case I40IW_CM_STATE_SYN_SENT: 2413 case I40IW_CM_STATE_MPAREQ_SENT: 2414 switch (cm_node->mpa_frame_rev) { 2415 case IETF_MPA_V2: 2416 cm_node->mpa_frame_rev = IETF_MPA_V1; 2417 /* send a syn and goto syn sent state */ 2418 cm_node->state = I40IW_CM_STATE_SYN_SENT; 2419 if (i40iw_send_syn(cm_node, 0)) 2420 i40iw_active_open_err(cm_node, false); 2421 break; 2422 case IETF_MPA_V1: 2423 default: 2424 i40iw_active_open_err(cm_node, false); 2425 break; 2426 } 2427 break; 2428 case I40IW_CM_STATE_MPAREQ_RCVD: 2429 atomic_add_return(1, &cm_node->passive_state); 2430 break; 2431 case I40IW_CM_STATE_ESTABLISHED: 2432 case I40IW_CM_STATE_SYN_RCVD: 2433 case I40IW_CM_STATE_LISTENING: 2434 i40iw_pr_err("Bad state state = %d\n", cm_node->state); 2435 i40iw_passive_open_err(cm_node, false); 2436 break; 2437 case I40IW_CM_STATE_OFFLOADED: 2438 i40iw_active_open_err(cm_node, false); 2439 break; 2440 case I40IW_CM_STATE_CLOSED: 2441 break; 2442 case I40IW_CM_STATE_FIN_WAIT2: 2443 case I40IW_CM_STATE_FIN_WAIT1: 2444 case I40IW_CM_STATE_LAST_ACK: 2445 cm_node->cm_id->rem_ref(cm_node->cm_id); 2446 fallthrough; 2447 case I40IW_CM_STATE_TIME_WAIT: 2448 cm_node->state = I40IW_CM_STATE_CLOSED; 2449 i40iw_rem_ref_cm_node(cm_node); 2450 break; 2451 default: 2452 break; 2453 } 2454} 2455 2456/** 2457 * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer 2458 * @cm_node: connection's node 2459 * @rbuf: receive buffer 2460 */ 2461static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, 2462 struct i40iw_puda_buf *rbuf) 2463{ 2464 int ret; 2465 int datasize = rbuf->datalen; 2466 u8 *dataloc = rbuf->data; 2467 2468 enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; 2469 u32 res_type; 2470 2471 ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); 2472 if (ret) { 2473 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) 2474 i40iw_active_open_err(cm_node, true); 2475 else 2476 i40iw_passive_open_err(cm_node, true); 2477 return; 2478 } 2479 2480 switch (cm_node->state) { 2481 case I40IW_CM_STATE_ESTABLISHED: 2482 if (res_type == I40IW_MPA_REQUEST_REJECT) 2483 i40iw_pr_err("state for reject\n"); 2484 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; 2485 type = I40IW_CM_EVENT_MPA_REQ; 2486 i40iw_send_ack(cm_node); /* ACK received MPA request */ 2487 atomic_set(&cm_node->passive_state, 2488 I40IW_PASSIVE_STATE_INDICATED); 2489 break; 2490 case I40IW_CM_STATE_MPAREQ_SENT: 2491 i40iw_cleanup_retrans_entry(cm_node); 2492 if (res_type == I40IW_MPA_REQUEST_REJECT) { 2493 type = I40IW_CM_EVENT_MPA_REJECT; 2494 cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; 2495 } else { 2496 type = I40IW_CM_EVENT_CONNECTED; 2497 cm_node->state = I40IW_CM_STATE_OFFLOADED; 2498 } 2499 i40iw_send_ack(cm_node); 2500 break; 2501 default: 2502 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); 2503 break; 2504 } 2505 i40iw_create_event(cm_node, type); 2506} 2507 2508/** 2509 * i40iw_indicate_pkt_err - Send up err event to cm 2510 * @cm_node: connection's node 2511 */ 2512static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) 2513{ 2514 switch (cm_node->state) { 2515 case I40IW_CM_STATE_SYN_SENT: 2516 case I40IW_CM_STATE_MPAREQ_SENT: 2517 i40iw_active_open_err(cm_node, true); 2518 break; 2519 case I40IW_CM_STATE_ESTABLISHED: 2520 case I40IW_CM_STATE_SYN_RCVD: 2521 i40iw_passive_open_err(cm_node, true); 2522 break; 2523 case I40IW_CM_STATE_OFFLOADED: 2524 default: 2525 break; 2526 } 2527} 2528 2529/** 2530 * i40iw_check_syn - Check for error on received syn ack 2531 * @cm_node: connection's node 2532 * @tcph: pointer tcp header 2533 */ 2534static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) 2535{ 2536 int err = 0; 2537 2538 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2539 err = 1; 2540 i40iw_active_open_err(cm_node, true); 2541 } 2542 return err; 2543} 2544 2545/** 2546 * i40iw_check_seq - check seq numbers if OK 2547 * @cm_node: connection's node 2548 * @tcph: pointer tcp header 2549 */ 2550static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) 2551{ 2552 int err = 0; 2553 u32 seq; 2554 u32 ack_seq; 2555 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2556 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2557 u32 rcv_wnd; 2558 2559 seq = ntohl(tcph->seq); 2560 ack_seq = ntohl(tcph->ack_seq); 2561 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2562 if (ack_seq != loc_seq_num) 2563 err = -1; 2564 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2565 err = -1; 2566 if (err) { 2567 i40iw_pr_err("seq number\n"); 2568 i40iw_indicate_pkt_err(cm_node); 2569 } 2570 return err; 2571} 2572 2573/** 2574 * i40iw_handle_syn_pkt - is for Passive node 2575 * @cm_node: connection's node 2576 * @rbuf: receive buffer 2577 */ 2578static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, 2579 struct i40iw_puda_buf *rbuf) 2580{ 2581 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2582 int ret; 2583 u32 inc_sequence; 2584 int optionsize; 2585 struct i40iw_cm_info nfo; 2586 2587 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2588 inc_sequence = ntohl(tcph->seq); 2589 2590 switch (cm_node->state) { 2591 case I40IW_CM_STATE_SYN_SENT: 2592 case I40IW_CM_STATE_MPAREQ_SENT: 2593 /* Rcvd syn on active open connection */ 2594 i40iw_active_open_err(cm_node, 1); 2595 break; 2596 case I40IW_CM_STATE_LISTENING: 2597 /* Passive OPEN */ 2598 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2599 cm_node->listener->backlog) { 2600 cm_node->cm_core->stats_backlog_drops++; 2601 i40iw_passive_open_err(cm_node, false); 2602 break; 2603 } 2604 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); 2605 if (ret) { 2606 i40iw_passive_open_err(cm_node, false); 2607 /* drop pkt */ 2608 break; 2609 } 2610 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2611 cm_node->accept_pend = 1; 2612 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2613 2614 cm_node->state = I40IW_CM_STATE_SYN_RCVD; 2615 i40iw_get_addr_info(cm_node, &nfo); 2616 ret = i40iw_manage_qhash(cm_node->iwdev, 2617 &nfo, 2618 I40IW_QHASH_TYPE_TCP_ESTABLISHED, 2619 I40IW_QHASH_MANAGE_TYPE_ADD, 2620 (void *)cm_node, 2621 false); 2622 cm_node->qhash_set = true; 2623 break; 2624 case I40IW_CM_STATE_CLOSED: 2625 i40iw_cleanup_retrans_entry(cm_node); 2626 atomic_inc(&cm_node->ref_count); 2627 i40iw_send_reset(cm_node); 2628 break; 2629 case I40IW_CM_STATE_OFFLOADED: 2630 case I40IW_CM_STATE_ESTABLISHED: 2631 case I40IW_CM_STATE_FIN_WAIT1: 2632 case I40IW_CM_STATE_FIN_WAIT2: 2633 case I40IW_CM_STATE_MPAREQ_RCVD: 2634 case I40IW_CM_STATE_LAST_ACK: 2635 case I40IW_CM_STATE_CLOSING: 2636 case I40IW_CM_STATE_UNKNOWN: 2637 default: 2638 break; 2639 } 2640} 2641 2642/** 2643 * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) 2644 * @cm_node: connection's node 2645 * @rbuf: receive buffer 2646 */ 2647static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, 2648 struct i40iw_puda_buf *rbuf) 2649{ 2650 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2651 int ret; 2652 u32 inc_sequence; 2653 int optionsize; 2654 2655 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2656 inc_sequence = ntohl(tcph->seq); 2657 switch (cm_node->state) { 2658 case I40IW_CM_STATE_SYN_SENT: 2659 i40iw_cleanup_retrans_entry(cm_node); 2660 /* active open */ 2661 if (i40iw_check_syn(cm_node, tcph)) { 2662 i40iw_pr_err("check syn fail\n"); 2663 return; 2664 } 2665 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2666 /* setup options */ 2667 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); 2668 if (ret) { 2669 i40iw_debug(cm_node->dev, 2670 I40IW_DEBUG_CM, 2671 "cm_node=%p tcp_options failed\n", 2672 cm_node); 2673 break; 2674 } 2675 i40iw_cleanup_retrans_entry(cm_node); 2676 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2677 i40iw_send_ack(cm_node); /* ACK for the syn_ack */ 2678 ret = i40iw_send_mpa_request(cm_node); 2679 if (ret) { 2680 i40iw_debug(cm_node->dev, 2681 I40IW_DEBUG_CM, 2682 "cm_node=%p i40iw_send_mpa_request failed\n", 2683 cm_node); 2684 break; 2685 } 2686 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; 2687 break; 2688 case I40IW_CM_STATE_MPAREQ_RCVD: 2689 i40iw_passive_open_err(cm_node, true); 2690 break; 2691 case I40IW_CM_STATE_LISTENING: 2692 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2693 i40iw_cleanup_retrans_entry(cm_node); 2694 cm_node->state = I40IW_CM_STATE_CLOSED; 2695 i40iw_send_reset(cm_node); 2696 break; 2697 case I40IW_CM_STATE_CLOSED: 2698 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2699 i40iw_cleanup_retrans_entry(cm_node); 2700 atomic_inc(&cm_node->ref_count); 2701 i40iw_send_reset(cm_node); 2702 break; 2703 case I40IW_CM_STATE_ESTABLISHED: 2704 case I40IW_CM_STATE_FIN_WAIT1: 2705 case I40IW_CM_STATE_FIN_WAIT2: 2706 case I40IW_CM_STATE_LAST_ACK: 2707 case I40IW_CM_STATE_OFFLOADED: 2708 case I40IW_CM_STATE_CLOSING: 2709 case I40IW_CM_STATE_UNKNOWN: 2710 case I40IW_CM_STATE_MPAREQ_SENT: 2711 default: 2712 break; 2713 } 2714} 2715 2716/** 2717 * i40iw_handle_ack_pkt - process packet with ACK 2718 * @cm_node: connection's node 2719 * @rbuf: receive buffer 2720 */ 2721static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, 2722 struct i40iw_puda_buf *rbuf) 2723{ 2724 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2725 u32 inc_sequence; 2726 int ret = 0; 2727 int optionsize; 2728 u32 datasize = rbuf->datalen; 2729 2730 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2731 2732 if (i40iw_check_seq(cm_node, tcph)) 2733 return -EINVAL; 2734 2735 inc_sequence = ntohl(tcph->seq); 2736 switch (cm_node->state) { 2737 case I40IW_CM_STATE_SYN_RCVD: 2738 i40iw_cleanup_retrans_entry(cm_node); 2739 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); 2740 if (ret) 2741 break; 2742 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2743 cm_node->state = I40IW_CM_STATE_ESTABLISHED; 2744 if (datasize) { 2745 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2746 i40iw_handle_rcv_mpa(cm_node, rbuf); 2747 } 2748 break; 2749 case I40IW_CM_STATE_ESTABLISHED: 2750 i40iw_cleanup_retrans_entry(cm_node); 2751 if (datasize) { 2752 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2753 i40iw_handle_rcv_mpa(cm_node, rbuf); 2754 } 2755 break; 2756 case I40IW_CM_STATE_MPAREQ_SENT: 2757 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2758 if (datasize) { 2759 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2760 cm_node->ack_rcvd = false; 2761 i40iw_handle_rcv_mpa(cm_node, rbuf); 2762 } else { 2763 cm_node->ack_rcvd = true; 2764 } 2765 break; 2766 case I40IW_CM_STATE_LISTENING: 2767 i40iw_cleanup_retrans_entry(cm_node); 2768 cm_node->state = I40IW_CM_STATE_CLOSED; 2769 i40iw_send_reset(cm_node); 2770 break; 2771 case I40IW_CM_STATE_CLOSED: 2772 i40iw_cleanup_retrans_entry(cm_node); 2773 atomic_inc(&cm_node->ref_count); 2774 i40iw_send_reset(cm_node); 2775 break; 2776 case I40IW_CM_STATE_LAST_ACK: 2777 case I40IW_CM_STATE_CLOSING: 2778 i40iw_cleanup_retrans_entry(cm_node); 2779 cm_node->state = I40IW_CM_STATE_CLOSED; 2780 if (!cm_node->accept_pend) 2781 cm_node->cm_id->rem_ref(cm_node->cm_id); 2782 i40iw_rem_ref_cm_node(cm_node); 2783 break; 2784 case I40IW_CM_STATE_FIN_WAIT1: 2785 i40iw_cleanup_retrans_entry(cm_node); 2786 cm_node->state = I40IW_CM_STATE_FIN_WAIT2; 2787 break; 2788 case I40IW_CM_STATE_SYN_SENT: 2789 case I40IW_CM_STATE_FIN_WAIT2: 2790 case I40IW_CM_STATE_OFFLOADED: 2791 case I40IW_CM_STATE_MPAREQ_RCVD: 2792 case I40IW_CM_STATE_UNKNOWN: 2793 default: 2794 i40iw_cleanup_retrans_entry(cm_node); 2795 break; 2796 } 2797 return ret; 2798} 2799 2800/** 2801 * i40iw_process_packet - process cm packet 2802 * @cm_node: connection's node 2803 * @rbuf: receive buffer 2804 */ 2805static void i40iw_process_packet(struct i40iw_cm_node *cm_node, 2806 struct i40iw_puda_buf *rbuf) 2807{ 2808 enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; 2809 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2810 u32 fin_set = 0; 2811 int ret; 2812 2813 if (tcph->rst) { 2814 pkt_type = I40IW_PKT_TYPE_RST; 2815 } else if (tcph->syn) { 2816 pkt_type = I40IW_PKT_TYPE_SYN; 2817 if (tcph->ack) 2818 pkt_type = I40IW_PKT_TYPE_SYNACK; 2819 } else if (tcph->ack) { 2820 pkt_type = I40IW_PKT_TYPE_ACK; 2821 } 2822 if (tcph->fin) 2823 fin_set = 1; 2824 2825 switch (pkt_type) { 2826 case I40IW_PKT_TYPE_SYN: 2827 i40iw_handle_syn_pkt(cm_node, rbuf); 2828 break; 2829 case I40IW_PKT_TYPE_SYNACK: 2830 i40iw_handle_synack_pkt(cm_node, rbuf); 2831 break; 2832 case I40IW_PKT_TYPE_ACK: 2833 ret = i40iw_handle_ack_pkt(cm_node, rbuf); 2834 if (fin_set && !ret) 2835 i40iw_handle_fin_pkt(cm_node); 2836 break; 2837 case I40IW_PKT_TYPE_RST: 2838 i40iw_handle_rst_pkt(cm_node, rbuf); 2839 break; 2840 default: 2841 if (fin_set && 2842 (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2843 i40iw_handle_fin_pkt(cm_node); 2844 break; 2845 } 2846} 2847 2848/** 2849 * i40iw_make_listen_node - create a listen node with params 2850 * @cm_core: cm's core 2851 * @iwdev: iwarp device structure 2852 * @cm_info: quad info for connection 2853 */ 2854static struct i40iw_cm_listener *i40iw_make_listen_node( 2855 struct i40iw_cm_core *cm_core, 2856 struct i40iw_device *iwdev, 2857 struct i40iw_cm_info *cm_info) 2858{ 2859 struct i40iw_cm_listener *listener; 2860 unsigned long flags; 2861 2862 /* cannot have multiple matching listeners */ 2863 listener = i40iw_find_listener(cm_core, cm_info->loc_addr, 2864 cm_info->loc_port, 2865 cm_info->vlan_id, 2866 I40IW_CM_LISTENER_EITHER_STATE); 2867 if (listener && 2868 (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { 2869 atomic_dec(&listener->ref_count); 2870 i40iw_debug(cm_core->dev, 2871 I40IW_DEBUG_CM, 2872 "Not creating listener since it already exists\n"); 2873 return NULL; 2874 } 2875 2876 if (!listener) { 2877 /* create a CM listen node (1/2 node to compare incoming traffic to) */ 2878 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2879 if (!listener) 2880 return NULL; 2881 cm_core->stats_listen_nodes_created++; 2882 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); 2883 listener->loc_port = cm_info->loc_port; 2884 2885 INIT_LIST_HEAD(&listener->child_listen_list); 2886 2887 atomic_set(&listener->ref_count, 1); 2888 } else { 2889 listener->reused_node = 1; 2890 } 2891 2892 listener->cm_id = cm_info->cm_id; 2893 listener->ipv4 = cm_info->ipv4; 2894 listener->vlan_id = cm_info->vlan_id; 2895 atomic_set(&listener->pend_accepts_cnt, 0); 2896 listener->cm_core = cm_core; 2897 listener->iwdev = iwdev; 2898 2899 listener->backlog = cm_info->backlog; 2900 listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; 2901 2902 if (!listener->reused_node) { 2903 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2904 list_add(&listener->list, &cm_core->listen_nodes); 2905 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2906 } 2907 2908 return listener; 2909} 2910 2911/** 2912 * i40iw_create_cm_node - make a connection node with params 2913 * @cm_core: cm's core 2914 * @iwdev: iwarp device structure 2915 * @conn_param: upper layer connection parameters 2916 * @cm_info: quad info for connection 2917 */ 2918static struct i40iw_cm_node *i40iw_create_cm_node( 2919 struct i40iw_cm_core *cm_core, 2920 struct i40iw_device *iwdev, 2921 struct iw_cm_conn_param *conn_param, 2922 struct i40iw_cm_info *cm_info) 2923{ 2924 struct i40iw_cm_node *cm_node; 2925 struct i40iw_cm_listener *loopback_remotelistener; 2926 struct i40iw_cm_node *loopback_remotenode; 2927 struct i40iw_cm_info loopback_cm_info; 2928 2929 u16 private_data_len = conn_param->private_data_len; 2930 const void *private_data = conn_param->private_data; 2931 2932 /* create a CM connection node */ 2933 cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); 2934 if (!cm_node) 2935 return ERR_PTR(-ENOMEM); 2936 /* set our node side to client (active) side */ 2937 cm_node->tcp_cntxt.client = 1; 2938 cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; 2939 2940 i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2941 2942 if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { 2943 loopback_remotelistener = i40iw_find_listener( 2944 cm_core, 2945 cm_info->rem_addr, 2946 cm_node->rem_port, 2947 cm_node->vlan_id, 2948 I40IW_CM_LISTENER_ACTIVE_STATE); 2949 if (!loopback_remotelistener) { 2950 i40iw_rem_ref_cm_node(cm_node); 2951 return ERR_PTR(-ECONNREFUSED); 2952 } else { 2953 loopback_cm_info = *cm_info; 2954 loopback_cm_info.loc_port = cm_info->rem_port; 2955 loopback_cm_info.rem_port = cm_info->loc_port; 2956 loopback_cm_info.cm_id = loopback_remotelistener->cm_id; 2957 loopback_cm_info.ipv4 = cm_info->ipv4; 2958 loopback_remotenode = i40iw_make_cm_node(cm_core, 2959 iwdev, 2960 &loopback_cm_info, 2961 loopback_remotelistener); 2962 if (!loopback_remotenode) { 2963 i40iw_rem_ref_cm_node(cm_node); 2964 return ERR_PTR(-ENOMEM); 2965 } 2966 cm_core->stats_loopbacks++; 2967 loopback_remotenode->loopbackpartner = cm_node; 2968 loopback_remotenode->tcp_cntxt.rcv_wscale = 2969 I40IW_CM_DEFAULT_RCV_WND_SCALE; 2970 cm_node->loopbackpartner = loopback_remotenode; 2971 memcpy(loopback_remotenode->pdata_buf, private_data, 2972 private_data_len); 2973 loopback_remotenode->pdata.size = private_data_len; 2974 2975 if (loopback_remotenode->ord_size > cm_node->ird_size) 2976 loopback_remotenode->ord_size = 2977 cm_node->ird_size; 2978 2979 cm_node->state = I40IW_CM_STATE_OFFLOADED; 2980 cm_node->tcp_cntxt.rcv_nxt = 2981 loopback_remotenode->tcp_cntxt.loc_seq_num; 2982 loopback_remotenode->tcp_cntxt.rcv_nxt = 2983 cm_node->tcp_cntxt.loc_seq_num; 2984 cm_node->tcp_cntxt.max_snd_wnd = 2985 loopback_remotenode->tcp_cntxt.rcv_wnd; 2986 loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; 2987 cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; 2988 loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; 2989 cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; 2990 loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; 2991 } 2992 return cm_node; 2993 } 2994 2995 cm_node->pdata.size = private_data_len; 2996 cm_node->pdata.addr = cm_node->pdata_buf; 2997 2998 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2999 3000 cm_node->state = I40IW_CM_STATE_SYN_SENT; 3001 return cm_node; 3002} 3003 3004/** 3005 * i40iw_cm_reject - reject and teardown a connection 3006 * @cm_node: connection's node 3007 * @pdate: ptr to private data for reject 3008 * @plen: size of private data 3009 */ 3010static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) 3011{ 3012 int ret = 0; 3013 int err; 3014 int passive_state; 3015 struct iw_cm_id *cm_id = cm_node->cm_id; 3016 struct i40iw_cm_node *loopback = cm_node->loopbackpartner; 3017 3018 if (cm_node->tcp_cntxt.client) 3019 return ret; 3020 i40iw_cleanup_retrans_entry(cm_node); 3021 3022 if (!loopback) { 3023 passive_state = atomic_add_return(1, &cm_node->passive_state); 3024 if (passive_state == I40IW_SEND_RESET_EVENT) { 3025 cm_node->state = I40IW_CM_STATE_CLOSED; 3026 i40iw_rem_ref_cm_node(cm_node); 3027 } else { 3028 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { 3029 i40iw_rem_ref_cm_node(cm_node); 3030 } else { 3031 ret = i40iw_send_mpa_reject(cm_node, pdata, plen); 3032 if (ret) { 3033 cm_node->state = I40IW_CM_STATE_CLOSED; 3034 err = i40iw_send_reset(cm_node); 3035 if (err) 3036 i40iw_pr_err("send reset failed\n"); 3037 } else { 3038 cm_id->add_ref(cm_id); 3039 } 3040 } 3041 } 3042 } else { 3043 cm_node->cm_id = NULL; 3044 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { 3045 i40iw_rem_ref_cm_node(cm_node); 3046 i40iw_rem_ref_cm_node(loopback); 3047 } else { 3048 ret = i40iw_send_cm_event(loopback, 3049 loopback->cm_id, 3050 IW_CM_EVENT_CONNECT_REPLY, 3051 -ECONNREFUSED); 3052 i40iw_rem_ref_cm_node(cm_node); 3053 loopback->state = I40IW_CM_STATE_CLOSING; 3054 3055 cm_id = loopback->cm_id; 3056 i40iw_rem_ref_cm_node(loopback); 3057 cm_id->rem_ref(cm_id); 3058 } 3059 } 3060 3061 return ret; 3062} 3063 3064/** 3065 * i40iw_cm_close - close of cm connection 3066 * @cm_node: connection's node 3067 */ 3068static int i40iw_cm_close(struct i40iw_cm_node *cm_node) 3069{ 3070 int ret = 0; 3071 3072 if (!cm_node) 3073 return -EINVAL; 3074 3075 switch (cm_node->state) { 3076 case I40IW_CM_STATE_SYN_RCVD: 3077 case I40IW_CM_STATE_SYN_SENT: 3078 case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: 3079 case I40IW_CM_STATE_ESTABLISHED: 3080 case I40IW_CM_STATE_ACCEPTING: 3081 case I40IW_CM_STATE_MPAREQ_SENT: 3082 case I40IW_CM_STATE_MPAREQ_RCVD: 3083 i40iw_cleanup_retrans_entry(cm_node); 3084 i40iw_send_reset(cm_node); 3085 break; 3086 case I40IW_CM_STATE_CLOSE_WAIT: 3087 cm_node->state = I40IW_CM_STATE_LAST_ACK; 3088 i40iw_send_fin(cm_node); 3089 break; 3090 case I40IW_CM_STATE_FIN_WAIT1: 3091 case I40IW_CM_STATE_FIN_WAIT2: 3092 case I40IW_CM_STATE_LAST_ACK: 3093 case I40IW_CM_STATE_TIME_WAIT: 3094 case I40IW_CM_STATE_CLOSING: 3095 ret = -1; 3096 break; 3097 case I40IW_CM_STATE_LISTENING: 3098 i40iw_cleanup_retrans_entry(cm_node); 3099 i40iw_send_reset(cm_node); 3100 break; 3101 case I40IW_CM_STATE_MPAREJ_RCVD: 3102 case I40IW_CM_STATE_UNKNOWN: 3103 case I40IW_CM_STATE_INITED: 3104 case I40IW_CM_STATE_CLOSED: 3105 case I40IW_CM_STATE_LISTENER_DESTROYED: 3106 i40iw_rem_ref_cm_node(cm_node); 3107 break; 3108 case I40IW_CM_STATE_OFFLOADED: 3109 if (cm_node->send_entry) 3110 i40iw_pr_err("send_entry\n"); 3111 i40iw_rem_ref_cm_node(cm_node); 3112 break; 3113 } 3114 return ret; 3115} 3116 3117/** 3118 * i40iw_receive_ilq - recv an ETHERNET packet, and process it 3119 * through CM 3120 * @vsi: pointer to the vsi structure 3121 * @rbuf: receive buffer 3122 */ 3123void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf) 3124{ 3125 struct i40iw_cm_node *cm_node; 3126 struct i40iw_cm_listener *listener; 3127 struct iphdr *iph; 3128 struct ipv6hdr *ip6h; 3129 struct tcphdr *tcph; 3130 struct i40iw_cm_info cm_info; 3131 struct i40iw_sc_dev *dev = vsi->dev; 3132 struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; 3133 struct i40iw_cm_core *cm_core = &iwdev->cm_core; 3134 struct vlan_ethhdr *ethh; 3135 u16 vtag; 3136 3137 /* if vlan, then maclen = 18 else 14 */ 3138 iph = (struct iphdr *)rbuf->iph; 3139 memset(&cm_info, 0, sizeof(cm_info)); 3140 3141 i40iw_debug_buf(dev, 3142 I40IW_DEBUG_ILQ, 3143 "RECEIVE ILQ BUFFER", 3144 rbuf->mem.va, 3145 rbuf->totallen); 3146 ethh = (struct vlan_ethhdr *)rbuf->mem.va; 3147 3148 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3149 vtag = ntohs(ethh->h_vlan_TCI); 3150 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 3151 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3152 i40iw_debug(cm_core->dev, 3153 I40IW_DEBUG_CM, 3154 "%s vlan_id=%d\n", 3155 __func__, 3156 cm_info.vlan_id); 3157 } else { 3158 cm_info.vlan_id = I40IW_NO_VLAN; 3159 } 3160 tcph = (struct tcphdr *)rbuf->tcph; 3161 3162 if (rbuf->ipv4) { 3163 cm_info.loc_addr[0] = ntohl(iph->daddr); 3164 cm_info.rem_addr[0] = ntohl(iph->saddr); 3165 cm_info.ipv4 = true; 3166 cm_info.tos = iph->tos; 3167 } else { 3168 ip6h = (struct ipv6hdr *)rbuf->iph; 3169 i40iw_copy_ip_ntohl(cm_info.loc_addr, 3170 ip6h->daddr.in6_u.u6_addr32); 3171 i40iw_copy_ip_ntohl(cm_info.rem_addr, 3172 ip6h->saddr.in6_u.u6_addr32); 3173 cm_info.ipv4 = false; 3174 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3175 } 3176 cm_info.loc_port = ntohs(tcph->dest); 3177 cm_info.rem_port = ntohs(tcph->source); 3178 cm_node = i40iw_find_node(cm_core, 3179 cm_info.rem_port, 3180 cm_info.rem_addr, 3181 cm_info.loc_port, 3182 cm_info.loc_addr, 3183 true, 3184 false); 3185 3186 if (!cm_node) { 3187 /* Only type of packet accepted are for */ 3188 /* the PASSIVE open (syn only) */ 3189 if (!tcph->syn || tcph->ack) 3190 return; 3191 listener = 3192 i40iw_find_listener(cm_core, 3193 cm_info.loc_addr, 3194 cm_info.loc_port, 3195 cm_info.vlan_id, 3196 I40IW_CM_LISTENER_ACTIVE_STATE); 3197 if (!listener) { 3198 cm_info.cm_id = NULL; 3199 i40iw_debug(cm_core->dev, 3200 I40IW_DEBUG_CM, 3201 "%s no listener found\n", 3202 __func__); 3203 return; 3204 } 3205 cm_info.cm_id = listener->cm_id; 3206 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); 3207 if (!cm_node) { 3208 i40iw_debug(cm_core->dev, 3209 I40IW_DEBUG_CM, 3210 "%s allocate node failed\n", 3211 __func__); 3212 atomic_dec(&listener->ref_count); 3213 return; 3214 } 3215 if (!tcph->rst && !tcph->fin) { 3216 cm_node->state = I40IW_CM_STATE_LISTENING; 3217 } else { 3218 i40iw_rem_ref_cm_node(cm_node); 3219 return; 3220 } 3221 atomic_inc(&cm_node->ref_count); 3222 } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { 3223 i40iw_rem_ref_cm_node(cm_node); 3224 return; 3225 } 3226 i40iw_process_packet(cm_node, rbuf); 3227 i40iw_rem_ref_cm_node(cm_node); 3228} 3229 3230/** 3231 * i40iw_setup_cm_core - allocate a top level instance of a cm 3232 * core 3233 * @iwdev: iwarp device structure 3234 */ 3235int i40iw_setup_cm_core(struct i40iw_device *iwdev) 3236{ 3237 struct i40iw_cm_core *cm_core = &iwdev->cm_core; 3238 3239 cm_core->iwdev = iwdev; 3240 cm_core->dev = &iwdev->sc_dev; 3241 3242 INIT_LIST_HEAD(&cm_core->accelerated_list); 3243 INIT_LIST_HEAD(&cm_core->non_accelerated_list); 3244 INIT_LIST_HEAD(&cm_core->listen_nodes); 3245 3246 timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0); 3247 3248 spin_lock_init(&cm_core->ht_lock); 3249 spin_lock_init(&cm_core->listen_list_lock); 3250 spin_lock_init(&cm_core->apbvt_lock); 3251 3252 cm_core->event_wq = alloc_ordered_workqueue("iwewq", 3253 WQ_MEM_RECLAIM); 3254 if (!cm_core->event_wq) 3255 goto error; 3256 3257 cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq", 3258 WQ_MEM_RECLAIM); 3259 if (!cm_core->disconn_wq) 3260 goto error; 3261 3262 return 0; 3263error: 3264 i40iw_cleanup_cm_core(&iwdev->cm_core); 3265 3266 return -ENOMEM; 3267} 3268 3269/** 3270 * i40iw_cleanup_cm_core - deallocate a top level instance of a 3271 * cm core 3272 * @cm_core: cm's core 3273 */ 3274void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) 3275{ 3276 unsigned long flags; 3277 3278 if (!cm_core) 3279 return; 3280 3281 spin_lock_irqsave(&cm_core->ht_lock, flags); 3282 if (timer_pending(&cm_core->tcp_timer)) 3283 del_timer_sync(&cm_core->tcp_timer); 3284 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 3285 3286 if (cm_core->event_wq) 3287 destroy_workqueue(cm_core->event_wq); 3288 if (cm_core->disconn_wq) 3289 destroy_workqueue(cm_core->disconn_wq); 3290} 3291 3292/** 3293 * i40iw_init_tcp_ctx - setup qp context 3294 * @cm_node: connection's node 3295 * @tcp_info: offload info for tcp 3296 * @iwqp: associate qp for the connection 3297 */ 3298static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, 3299 struct i40iw_tcp_offload_info *tcp_info, 3300 struct i40iw_qp *iwqp) 3301{ 3302 tcp_info->ipv4 = cm_node->ipv4; 3303 tcp_info->drop_ooo_seg = true; 3304 tcp_info->wscale = true; 3305 tcp_info->ignore_tcp_opt = true; 3306 tcp_info->ignore_tcp_uns_opt = true; 3307 tcp_info->no_nagle = false; 3308 3309 tcp_info->ttl = I40IW_DEFAULT_TTL; 3310 tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); 3311 tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); 3312 tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; 3313 3314 tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; 3315 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3316 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3317 3318 tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); 3319 tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); 3320 tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); 3321 tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); 3322 3323 tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); 3324 tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); 3325 tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); 3326 tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); 3327 tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); 3328 tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << 3329 cm_node->tcp_cntxt.rcv_wscale); 3330 3331 tcp_info->flow_label = 0; 3332 tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); 3333 if (cm_node->vlan_id <= VLAN_VID_MASK) { 3334 tcp_info->insert_vlan_tag = true; 3335 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) | 3336 cm_node->vlan_id); 3337 } 3338 if (cm_node->ipv4) { 3339 tcp_info->src_port = cpu_to_le16(cm_node->loc_port); 3340 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); 3341 3342 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]); 3343 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]); 3344 tcp_info->arp_idx = 3345 cpu_to_le16((u16)i40iw_arp_table( 3346 iwqp->iwdev, 3347 &tcp_info->dest_ip_addr3, 3348 true, 3349 NULL, 3350 I40IW_ARP_RESOLVE)); 3351 } else { 3352 tcp_info->src_port = cpu_to_le16(cm_node->loc_port); 3353 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); 3354 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]); 3355 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]); 3356 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]); 3357 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]); 3358 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]); 3359 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]); 3360 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]); 3361 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]); 3362 tcp_info->arp_idx = 3363 cpu_to_le16((u16)i40iw_arp_table( 3364 iwqp->iwdev, 3365 &tcp_info->dest_ip_addr0, 3366 false, 3367 NULL, 3368 I40IW_ARP_RESOLVE)); 3369 } 3370} 3371 3372/** 3373 * i40iw_cm_init_tsa_conn - setup qp for RTS 3374 * @iwqp: associate qp for the connection 3375 * @cm_node: connection's node 3376 */ 3377static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, 3378 struct i40iw_cm_node *cm_node) 3379{ 3380 struct i40iw_tcp_offload_info tcp_info; 3381 struct i40iwarp_offload_info *iwarp_info; 3382 struct i40iw_qp_host_ctx_info *ctx_info; 3383 struct i40iw_device *iwdev = iwqp->iwdev; 3384 struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; 3385 3386 memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); 3387 iwarp_info = &iwqp->iwarp_info; 3388 ctx_info = &iwqp->ctx_info; 3389 3390 ctx_info->tcp_info = &tcp_info; 3391 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3392 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3393 3394 iwarp_info->ord_size = cm_node->ord_size; 3395 iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); 3396 3397 if (iwarp_info->ord_size == 1) 3398 iwarp_info->ord_size = 2; 3399 3400 iwarp_info->rd_enable = true; 3401 iwarp_info->rdmap_ver = 1; 3402 iwarp_info->ddp_ver = 1; 3403 3404 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3405 3406 ctx_info->tcp_info_valid = true; 3407 ctx_info->iwarp_info_valid = true; 3408 ctx_info->add_to_qoslist = true; 3409 ctx_info->user_pri = cm_node->user_pri; 3410 3411 i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); 3412 if (cm_node->snd_mark_en) { 3413 iwarp_info->snd_mark_en = true; 3414 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & 3415 SNDMARKER_SEQNMASK) + cm_node->lsmm_size; 3416 } 3417 3418 cm_node->state = I40IW_CM_STATE_OFFLOADED; 3419 tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; 3420 tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; 3421 tcp_info.tos = cm_node->tos; 3422 3423 dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); 3424 3425 /* once tcp_info is set, no need to do it again */ 3426 ctx_info->tcp_info_valid = false; 3427 ctx_info->iwarp_info_valid = false; 3428 ctx_info->add_to_qoslist = false; 3429} 3430 3431/** 3432 * i40iw_cm_disconn - when a connection is being closed 3433 * @iwqp: associate qp for the connection 3434 */ 3435void i40iw_cm_disconn(struct i40iw_qp *iwqp) 3436{ 3437 struct disconn_work *work; 3438 struct i40iw_device *iwdev = iwqp->iwdev; 3439 struct i40iw_cm_core *cm_core = &iwdev->cm_core; 3440 unsigned long flags; 3441 3442 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3443 if (!work) 3444 return; /* Timer will clean up */ 3445 3446 spin_lock_irqsave(&iwdev->qptable_lock, flags); 3447 if (!iwdev->qp_table[iwqp->ibqp.qp_num]) { 3448 spin_unlock_irqrestore(&iwdev->qptable_lock, flags); 3449 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, 3450 "%s qp_id %d is already freed\n", 3451 __func__, iwqp->ibqp.qp_num); 3452 kfree(work); 3453 return; 3454 } 3455 i40iw_qp_add_ref(&iwqp->ibqp); 3456 spin_unlock_irqrestore(&iwdev->qptable_lock, flags); 3457 3458 work->iwqp = iwqp; 3459 INIT_WORK(&work->work, i40iw_disconnect_worker); 3460 queue_work(cm_core->disconn_wq, &work->work); 3461 return; 3462} 3463 3464/** 3465 * i40iw_qp_disconnect - free qp and close cm 3466 * @iwqp: associate qp for the connection 3467 */ 3468static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) 3469{ 3470 struct i40iw_device *iwdev; 3471 struct i40iw_ib_device *iwibdev; 3472 3473 iwdev = to_iwdev(iwqp->ibqp.device); 3474 if (!iwdev) { 3475 i40iw_pr_err("iwdev == NULL\n"); 3476 return; 3477 } 3478 3479 iwibdev = iwdev->iwibdev; 3480 3481 if (iwqp->active_conn) { 3482 /* indicate this connection is NOT active */ 3483 iwqp->active_conn = 0; 3484 } else { 3485 /* Need to free the Last Streaming Mode Message */ 3486 if (iwqp->ietf_mem.va) { 3487 if (iwqp->lsmm_mr) 3488 iwibdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, 3489 NULL); 3490 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); 3491 } 3492 } 3493 3494 /* close the CM node down if it is still active */ 3495 if (iwqp->cm_node) { 3496 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); 3497 i40iw_cm_close(iwqp->cm_node); 3498 } 3499} 3500 3501/** 3502 * i40iw_cm_disconn_true - called by worker thread to disconnect qp 3503 * @iwqp: associate qp for the connection 3504 */ 3505static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) 3506{ 3507 struct iw_cm_id *cm_id; 3508 struct i40iw_device *iwdev; 3509 struct i40iw_sc_qp *qp = &iwqp->sc_qp; 3510 u16 last_ae; 3511 u8 original_hw_tcp_state; 3512 u8 original_ibqp_state; 3513 int disconn_status = 0; 3514 int issue_disconn = 0; 3515 int issue_close = 0; 3516 int issue_flush = 0; 3517 struct ib_event ibevent; 3518 unsigned long flags; 3519 int ret; 3520 3521 if (!iwqp) { 3522 i40iw_pr_err("iwqp == NULL\n"); 3523 return; 3524 } 3525 3526 spin_lock_irqsave(&iwqp->lock, flags); 3527 cm_id = iwqp->cm_id; 3528 /* make sure we havent already closed this connection */ 3529 if (!cm_id) { 3530 spin_unlock_irqrestore(&iwqp->lock, flags); 3531 return; 3532 } 3533 3534 iwdev = to_iwdev(iwqp->ibqp.device); 3535 3536 original_hw_tcp_state = iwqp->hw_tcp_state; 3537 original_ibqp_state = iwqp->ibqp_state; 3538 last_ae = iwqp->last_aeq; 3539 3540 if (qp->term_flags) { 3541 issue_disconn = 1; 3542 issue_close = 1; 3543 iwqp->cm_id = NULL; 3544 /*When term timer expires after cm_timer, don't want 3545 *terminate-handler to issue cm_disconn which can re-free 3546 *a QP even after its refcnt=0. 3547 */ 3548 i40iw_terminate_del_timer(qp); 3549 if (!iwqp->flush_issued) { 3550 iwqp->flush_issued = 1; 3551 issue_flush = 1; 3552 } 3553 } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || 3554 ((original_ibqp_state == IB_QPS_RTS) && 3555 (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { 3556 issue_disconn = 1; 3557 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) 3558 disconn_status = -ECONNRESET; 3559 } 3560 3561 if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || 3562 (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || 3563 (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || 3564 (last_ae == I40IW_AE_LLP_CONNECTION_RESET) || 3565 iwdev->reset)) { 3566 issue_close = 1; 3567 iwqp->cm_id = NULL; 3568 if (!iwqp->flush_issued) { 3569 iwqp->flush_issued = 1; 3570 issue_flush = 1; 3571 } 3572 } 3573 3574 spin_unlock_irqrestore(&iwqp->lock, flags); 3575 if (issue_flush && !iwqp->destroyed) { 3576 /* Flush the queues */ 3577 i40iw_flush_wqes(iwdev, iwqp); 3578 3579 if (qp->term_flags && iwqp->ibqp.event_handler) { 3580 ibevent.device = iwqp->ibqp.device; 3581 ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? 3582 IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; 3583 ibevent.element.qp = &iwqp->ibqp; 3584 iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); 3585 } 3586 } 3587 3588 if (cm_id && cm_id->event_handler) { 3589 if (issue_disconn) { 3590 ret = i40iw_send_cm_event(NULL, 3591 cm_id, 3592 IW_CM_EVENT_DISCONNECT, 3593 disconn_status); 3594 3595 if (ret) 3596 i40iw_debug(&iwdev->sc_dev, 3597 I40IW_DEBUG_CM, 3598 "disconnect event failed %s: - cm_id = %p\n", 3599 __func__, cm_id); 3600 } 3601 if (issue_close) { 3602 i40iw_qp_disconnect(iwqp); 3603 cm_id->provider_data = iwqp; 3604 ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); 3605 if (ret) 3606 i40iw_debug(&iwdev->sc_dev, 3607 I40IW_DEBUG_CM, 3608 "close event failed %s: - cm_id = %p\n", 3609 __func__, cm_id); 3610 cm_id->rem_ref(cm_id); 3611 } 3612 } 3613} 3614 3615/** 3616 * i40iw_disconnect_worker - worker for connection close 3617 * @work: points or disconn structure 3618 */ 3619static void i40iw_disconnect_worker(struct work_struct *work) 3620{ 3621 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3622 struct i40iw_qp *iwqp = dwork->iwqp; 3623 3624 kfree(dwork); 3625 i40iw_cm_disconn_true(iwqp); 3626 i40iw_qp_rem_ref(&iwqp->ibqp); 3627} 3628 3629/** 3630 * i40iw_accept - registered call for connection to be accepted 3631 * @cm_id: cm information for passive connection 3632 * @conn_param: accpet parameters 3633 */ 3634int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3635{ 3636 struct ib_qp *ibqp; 3637 struct i40iw_qp *iwqp; 3638 struct i40iw_device *iwdev; 3639 struct i40iw_sc_dev *dev; 3640 struct i40iw_cm_core *cm_core; 3641 struct i40iw_cm_node *cm_node; 3642 struct ib_qp_attr attr; 3643 int passive_state; 3644 struct ib_mr *ibmr; 3645 struct i40iw_pd *iwpd; 3646 u16 buf_len = 0; 3647 struct i40iw_kmem_info accept; 3648 enum i40iw_status_code status; 3649 u64 tagged_offset; 3650 unsigned long flags; 3651 3652 memset(&attr, 0, sizeof(attr)); 3653 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); 3654 if (!ibqp) 3655 return -EINVAL; 3656 3657 iwqp = to_iwqp(ibqp); 3658 iwdev = iwqp->iwdev; 3659 dev = &iwdev->sc_dev; 3660 cm_core = &iwdev->cm_core; 3661 cm_node = (struct i40iw_cm_node *)cm_id->provider_data; 3662 3663 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3664 cm_node->ipv4 = true; 3665 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); 3666 } else { 3667 cm_node->ipv4 = false; 3668 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id); 3669 } 3670 i40iw_debug(cm_node->dev, 3671 I40IW_DEBUG_CM, 3672 "Accept vlan_id=%d\n", 3673 cm_node->vlan_id); 3674 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { 3675 if (cm_node->loopbackpartner) 3676 i40iw_rem_ref_cm_node(cm_node->loopbackpartner); 3677 i40iw_rem_ref_cm_node(cm_node); 3678 return -EINVAL; 3679 } 3680 3681 passive_state = atomic_add_return(1, &cm_node->passive_state); 3682 if (passive_state == I40IW_SEND_RESET_EVENT) { 3683 i40iw_rem_ref_cm_node(cm_node); 3684 return -ECONNRESET; 3685 } 3686 3687 cm_node->cm_core->stats_accepts++; 3688 iwqp->cm_node = (void *)cm_node; 3689 cm_node->iwqp = iwqp; 3690 3691 buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE; 3692 3693 status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); 3694 3695 if (status) 3696 return -ENOMEM; 3697 cm_node->pdata.size = conn_param->private_data_len; 3698 accept.addr = iwqp->ietf_mem.va; 3699 accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3700 memcpy(accept.addr + accept.size, conn_param->private_data, 3701 conn_param->private_data_len); 3702 3703 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3704 if ((cm_node->ipv4 && 3705 !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 3706 (!cm_node->ipv4 && 3707 !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { 3708 iwpd = iwqp->iwpd; 3709 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3710 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, 3711 iwqp->ietf_mem.pa, 3712 buf_len, 3713 IB_ACCESS_LOCAL_WRITE, 3714 &tagged_offset); 3715 if (IS_ERR(ibmr)) { 3716 i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); 3717 return -ENOMEM; 3718 } 3719 3720 ibmr->pd = &iwpd->ibpd; 3721 ibmr->device = iwpd->ibpd.device; 3722 iwqp->lsmm_mr = ibmr; 3723 if (iwqp->page) 3724 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); 3725 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, 3726 iwqp->ietf_mem.va, 3727 (accept.size + conn_param->private_data_len), 3728 ibmr->lkey); 3729 3730 } else { 3731 if (iwqp->page) 3732 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); 3733 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0); 3734 } 3735 3736 if (iwqp->page) 3737 kunmap(iwqp->page); 3738 3739 iwqp->cm_id = cm_id; 3740 cm_node->cm_id = cm_id; 3741 3742 cm_id->provider_data = (void *)iwqp; 3743 iwqp->active_conn = 0; 3744 3745 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3746 i40iw_cm_init_tsa_conn(iwqp, cm_node); 3747 cm_id->add_ref(cm_id); 3748 i40iw_qp_add_ref(&iwqp->ibqp); 3749 3750 attr.qp_state = IB_QPS_RTS; 3751 cm_node->qhash_set = false; 3752 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3753 3754 cm_node->accelerated = true; 3755 spin_lock_irqsave(&cm_core->ht_lock, flags); 3756 list_move_tail(&cm_node->list, &cm_core->accelerated_list); 3757 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 3758 3759 status = 3760 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3761 if (status) 3762 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n"); 3763 3764 if (cm_node->loopbackpartner) { 3765 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; 3766 3767 /* copy entire MPA frame to our cm_node's frame */ 3768 memcpy(cm_node->loopbackpartner->pdata_buf, 3769 conn_param->private_data, 3770 conn_param->private_data_len); 3771 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); 3772 } 3773 3774 if (cm_node->accept_pend) { 3775 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3776 cm_node->accept_pend = 0; 3777 } 3778 return 0; 3779} 3780 3781/** 3782 * i40iw_reject - registered call for connection to be rejected 3783 * @cm_id: cm information for passive connection 3784 * @pdata: private data to be sent 3785 * @pdata_len: private data length 3786 */ 3787int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3788{ 3789 struct i40iw_device *iwdev; 3790 struct i40iw_cm_node *cm_node; 3791 struct i40iw_cm_node *loopback; 3792 3793 cm_node = (struct i40iw_cm_node *)cm_id->provider_data; 3794 loopback = cm_node->loopbackpartner; 3795 cm_node->cm_id = cm_id; 3796 cm_node->pdata.size = pdata_len; 3797 3798 iwdev = to_iwdev(cm_id->device); 3799 if (!iwdev) 3800 return -EINVAL; 3801 cm_node->cm_core->stats_rejects++; 3802 3803 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) 3804 return -EINVAL; 3805 3806 if (loopback) { 3807 memcpy(&loopback->pdata_buf, pdata, pdata_len); 3808 loopback->pdata.size = pdata_len; 3809 } 3810 3811 return i40iw_cm_reject(cm_node, pdata, pdata_len); 3812} 3813 3814/** 3815 * i40iw_connect - registered call for connection to be established 3816 * @cm_id: cm information for passive connection 3817 * @conn_param: Information about the connection 3818 */ 3819int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3820{ 3821 struct ib_qp *ibqp; 3822 struct i40iw_qp *iwqp; 3823 struct i40iw_device *iwdev; 3824 struct i40iw_cm_node *cm_node; 3825 struct i40iw_cm_info cm_info; 3826 struct sockaddr_in *laddr; 3827 struct sockaddr_in *raddr; 3828 struct sockaddr_in6 *laddr6; 3829 struct sockaddr_in6 *raddr6; 3830 int ret = 0; 3831 3832 ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); 3833 if (!ibqp) 3834 return -EINVAL; 3835 iwqp = to_iwqp(ibqp); 3836 if (!iwqp) 3837 return -EINVAL; 3838 iwdev = to_iwdev(iwqp->ibqp.device); 3839 if (!iwdev) 3840 return -EINVAL; 3841 3842 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3843 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3844 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3845 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3846 3847 if (!(laddr->sin_port) || !(raddr->sin_port)) 3848 return -EINVAL; 3849 3850 iwqp->active_conn = 1; 3851 iwqp->cm_id = NULL; 3852 cm_id->provider_data = iwqp; 3853 3854 /* set up the connection params for the node */ 3855 if (cm_id->remote_addr.ss_family == AF_INET) { 3856 cm_info.ipv4 = true; 3857 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3858 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3859 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3860 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3861 cm_info.loc_port = ntohs(laddr->sin_port); 3862 cm_info.rem_port = ntohs(raddr->sin_port); 3863 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); 3864 } else { 3865 cm_info.ipv4 = false; 3866 i40iw_copy_ip_ntohl(cm_info.loc_addr, 3867 laddr6->sin6_addr.in6_u.u6_addr32); 3868 i40iw_copy_ip_ntohl(cm_info.rem_addr, 3869 raddr6->sin6_addr.in6_u.u6_addr32); 3870 cm_info.loc_port = ntohs(laddr6->sin6_port); 3871 cm_info.rem_port = ntohs(raddr6->sin6_port); 3872 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id); 3873 } 3874 cm_info.cm_id = cm_id; 3875 cm_info.tos = cm_id->tos; 3876 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3877 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n", 3878 __func__, cm_id->tos, cm_info.user_pri); 3879 cm_id->add_ref(cm_id); 3880 cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, 3881 conn_param, &cm_info); 3882 3883 if (IS_ERR(cm_node)) { 3884 ret = PTR_ERR(cm_node); 3885 cm_id->rem_ref(cm_id); 3886 return ret; 3887 } 3888 3889 if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || 3890 (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, 3891 raddr6->sin6_addr.in6_u.u6_addr32, 3892 sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { 3893 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED, 3894 I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3895 ret = -EINVAL; 3896 goto err; 3897 } 3898 cm_node->qhash_set = true; 3899 } 3900 3901 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, 3902 I40IW_MANAGE_APBVT_ADD)) { 3903 ret = -EINVAL; 3904 goto err; 3905 } 3906 3907 cm_node->apbvt_set = true; 3908 iwqp->cm_node = cm_node; 3909 cm_node->iwqp = iwqp; 3910 iwqp->cm_id = cm_id; 3911 i40iw_qp_add_ref(&iwqp->ibqp); 3912 3913 if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { 3914 cm_node->state = I40IW_CM_STATE_SYN_SENT; 3915 ret = i40iw_send_syn(cm_node, 0); 3916 if (ret) 3917 goto err; 3918 } 3919 3920 if (cm_node->loopbackpartner) { 3921 cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD; 3922 i40iw_create_event(cm_node->loopbackpartner, 3923 I40IW_CM_EVENT_MPA_REQ); 3924 } 3925 3926 i40iw_debug(cm_node->dev, 3927 I40IW_DEBUG_CM, 3928 "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", 3929 cm_node->rem_port, 3930 cm_node, 3931 cm_node->cm_id); 3932 3933 return 0; 3934 3935err: 3936 if (cm_info.ipv4) 3937 i40iw_debug(&iwdev->sc_dev, 3938 I40IW_DEBUG_CM, 3939 "Api - connect() FAILED: dest addr=%pI4", 3940 cm_info.rem_addr); 3941 else 3942 i40iw_debug(&iwdev->sc_dev, 3943 I40IW_DEBUG_CM, 3944 "Api - connect() FAILED: dest addr=%pI6", 3945 cm_info.rem_addr); 3946 3947 i40iw_rem_ref_cm_node(cm_node); 3948 cm_id->rem_ref(cm_id); 3949 iwdev->cm_core.stats_connect_errs++; 3950 return ret; 3951} 3952 3953/** 3954 * i40iw_create_listen - registered call creating listener 3955 * @cm_id: cm information for passive connection 3956 * @backlog: to max accept pending count 3957 */ 3958int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) 3959{ 3960 struct i40iw_device *iwdev; 3961 struct i40iw_cm_listener *cm_listen_node; 3962 struct i40iw_cm_info cm_info; 3963 enum i40iw_status_code ret; 3964 struct sockaddr_in *laddr; 3965 struct sockaddr_in6 *laddr6; 3966 bool wildcard = false; 3967 3968 iwdev = to_iwdev(cm_id->device); 3969 if (!iwdev) 3970 return -EINVAL; 3971 3972 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3973 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3974 memset(&cm_info, 0, sizeof(cm_info)); 3975 if (laddr->sin_family == AF_INET) { 3976 cm_info.ipv4 = true; 3977 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3978 cm_info.loc_port = ntohs(laddr->sin_port); 3979 3980 if (laddr->sin_addr.s_addr != INADDR_ANY) 3981 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); 3982 else 3983 wildcard = true; 3984 3985 } else { 3986 cm_info.ipv4 = false; 3987 i40iw_copy_ip_ntohl(cm_info.loc_addr, 3988 laddr6->sin6_addr.in6_u.u6_addr32); 3989 cm_info.loc_port = ntohs(laddr6->sin6_port); 3990 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) 3991 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, 3992 &cm_info.vlan_id); 3993 else 3994 wildcard = true; 3995 } 3996 cm_info.backlog = backlog; 3997 cm_info.cm_id = cm_id; 3998 3999 cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); 4000 if (!cm_listen_node) { 4001 i40iw_pr_err("cm_listen_node == NULL\n"); 4002 return -ENOMEM; 4003 } 4004 4005 cm_id->provider_data = cm_listen_node; 4006 4007 cm_listen_node->tos = cm_id->tos; 4008 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 4009 cm_info.user_pri = cm_listen_node->user_pri; 4010 4011 if (!cm_listen_node->reused_node) { 4012 if (wildcard) { 4013 if (cm_info.ipv4) 4014 ret = i40iw_add_mqh_4(iwdev, 4015 &cm_info, 4016 cm_listen_node); 4017 else 4018 ret = i40iw_add_mqh_6(iwdev, 4019 &cm_info, 4020 cm_listen_node); 4021 if (ret) 4022 goto error; 4023 4024 ret = i40iw_manage_apbvt(iwdev, 4025 cm_info.loc_port, 4026 I40IW_MANAGE_APBVT_ADD); 4027 4028 if (ret) 4029 goto error; 4030 } else { 4031 ret = i40iw_manage_qhash(iwdev, 4032 &cm_info, 4033 I40IW_QHASH_TYPE_TCP_SYN, 4034 I40IW_QHASH_MANAGE_TYPE_ADD, 4035 NULL, 4036 true); 4037 if (ret) 4038 goto error; 4039 cm_listen_node->qhash_set = true; 4040 ret = i40iw_manage_apbvt(iwdev, 4041 cm_info.loc_port, 4042 I40IW_MANAGE_APBVT_ADD); 4043 if (ret) 4044 goto error; 4045 } 4046 } 4047 cm_id->add_ref(cm_id); 4048 cm_listen_node->cm_core->stats_listen_created++; 4049 return 0; 4050 error: 4051 i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); 4052 return -EINVAL; 4053} 4054 4055/** 4056 * i40iw_destroy_listen - registered call to destroy listener 4057 * @cm_id: cm information for passive connection 4058 */ 4059int i40iw_destroy_listen(struct iw_cm_id *cm_id) 4060{ 4061 struct i40iw_device *iwdev; 4062 4063 iwdev = to_iwdev(cm_id->device); 4064 if (cm_id->provider_data) 4065 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); 4066 else 4067 i40iw_pr_err("cm_id->provider_data was NULL\n"); 4068 4069 cm_id->rem_ref(cm_id); 4070 4071 return 0; 4072} 4073 4074/** 4075 * i40iw_cm_event_connected - handle connected active node 4076 * @event: the info for cm_node of connection 4077 */ 4078static void i40iw_cm_event_connected(struct i40iw_cm_event *event) 4079{ 4080 struct i40iw_qp *iwqp; 4081 struct i40iw_device *iwdev; 4082 struct i40iw_cm_core *cm_core; 4083 struct i40iw_cm_node *cm_node; 4084 struct i40iw_sc_dev *dev; 4085 struct ib_qp_attr attr; 4086 struct iw_cm_id *cm_id; 4087 unsigned long flags; 4088 int status; 4089 bool read0; 4090 4091 cm_node = event->cm_node; 4092 cm_id = cm_node->cm_id; 4093 iwqp = (struct i40iw_qp *)cm_id->provider_data; 4094 iwdev = to_iwdev(iwqp->ibqp.device); 4095 dev = &iwdev->sc_dev; 4096 cm_core = &iwdev->cm_core; 4097 4098 if (iwqp->destroyed) { 4099 status = -ETIMEDOUT; 4100 goto error; 4101 } 4102 i40iw_cm_init_tsa_conn(iwqp, cm_node); 4103 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4104 if (iwqp->page) 4105 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); 4106 dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); 4107 if (iwqp->page) 4108 kunmap(iwqp->page); 4109 4110 memset(&attr, 0, sizeof(attr)); 4111 attr.qp_state = IB_QPS_RTS; 4112 cm_node->qhash_set = false; 4113 i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4114 4115 cm_node->accelerated = true; 4116 spin_lock_irqsave(&cm_core->ht_lock, flags); 4117 list_move_tail(&cm_node->list, &cm_core->accelerated_list); 4118 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 4119 status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4120 0); 4121 if (status) 4122 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n"); 4123 4124 return; 4125 4126error: 4127 iwqp->cm_id = NULL; 4128 cm_id->provider_data = NULL; 4129 i40iw_send_cm_event(event->cm_node, 4130 cm_id, 4131 IW_CM_EVENT_CONNECT_REPLY, 4132 status); 4133 cm_id->rem_ref(cm_id); 4134 i40iw_rem_ref_cm_node(event->cm_node); 4135} 4136 4137/** 4138 * i40iw_cm_event_reset - handle reset 4139 * @event: the info for cm_node of connection 4140 */ 4141static void i40iw_cm_event_reset(struct i40iw_cm_event *event) 4142{ 4143 struct i40iw_cm_node *cm_node = event->cm_node; 4144 struct iw_cm_id *cm_id = cm_node->cm_id; 4145 struct i40iw_qp *iwqp; 4146 4147 if (!cm_id) 4148 return; 4149 4150 iwqp = cm_id->provider_data; 4151 if (!iwqp) 4152 return; 4153 4154 i40iw_debug(cm_node->dev, 4155 I40IW_DEBUG_CM, 4156 "reset event %p - cm_id = %p\n", 4157 event->cm_node, cm_id); 4158 iwqp->cm_id = NULL; 4159 4160 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); 4161 i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4162} 4163 4164/** 4165 * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer 4166 * @work: pointer of cm event info. 4167 */ 4168static void i40iw_cm_event_handler(struct work_struct *work) 4169{ 4170 struct i40iw_cm_event *event = container_of(work, 4171 struct i40iw_cm_event, 4172 event_work); 4173 struct i40iw_cm_node *cm_node; 4174 4175 if (!event || !event->cm_node || !event->cm_node->cm_core) 4176 return; 4177 4178 cm_node = event->cm_node; 4179 4180 switch (event->type) { 4181 case I40IW_CM_EVENT_MPA_REQ: 4182 i40iw_send_cm_event(cm_node, 4183 cm_node->cm_id, 4184 IW_CM_EVENT_CONNECT_REQUEST, 4185 0); 4186 break; 4187 case I40IW_CM_EVENT_RESET: 4188 i40iw_cm_event_reset(event); 4189 break; 4190 case I40IW_CM_EVENT_CONNECTED: 4191 if (!event->cm_node->cm_id || 4192 (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) 4193 break; 4194 i40iw_cm_event_connected(event); 4195 break; 4196 case I40IW_CM_EVENT_MPA_REJECT: 4197 if (!event->cm_node->cm_id || 4198 (cm_node->state == I40IW_CM_STATE_OFFLOADED)) 4199 break; 4200 i40iw_send_cm_event(cm_node, 4201 cm_node->cm_id, 4202 IW_CM_EVENT_CONNECT_REPLY, 4203 -ECONNREFUSED); 4204 break; 4205 case I40IW_CM_EVENT_ABORTED: 4206 if (!event->cm_node->cm_id || 4207 (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) 4208 break; 4209 i40iw_event_connect_error(event); 4210 break; 4211 default: 4212 i40iw_pr_err("event type = %d\n", event->type); 4213 break; 4214 } 4215 4216 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); 4217 i40iw_rem_ref_cm_node(event->cm_node); 4218 kfree(event); 4219} 4220 4221/** 4222 * i40iw_cm_post_event - queue event request for worker thread 4223 * @event: cm node's info for up event call 4224 */ 4225static void i40iw_cm_post_event(struct i40iw_cm_event *event) 4226{ 4227 atomic_inc(&event->cm_node->ref_count); 4228 event->cm_info.cm_id->add_ref(event->cm_info.cm_id); 4229 INIT_WORK(&event->event_work, i40iw_cm_event_handler); 4230 4231 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4232} 4233 4234/** 4235 * i40iw_qhash_ctrl - enable/disable qhash for list 4236 * @iwdev: device pointer 4237 * @parent_listen_node: parent listen node 4238 * @nfo: cm info node 4239 * @ipaddr: Pointer to IPv4 or IPv6 address 4240 * @ipv4: flag indicating IPv4 when true 4241 * @ifup: flag indicating interface up when true 4242 * 4243 * Enables or disables the qhash for the node in the child 4244 * listen list that matches ipaddr. If no matching IP was found 4245 * it will allocate and add a new child listen node to the 4246 * parent listen node. The listen_list_lock is assumed to be 4247 * held when called. 4248 */ 4249static void i40iw_qhash_ctrl(struct i40iw_device *iwdev, 4250 struct i40iw_cm_listener *parent_listen_node, 4251 struct i40iw_cm_info *nfo, 4252 u32 *ipaddr, bool ipv4, bool ifup) 4253{ 4254 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4255 struct i40iw_cm_listener *child_listen_node; 4256 struct list_head *pos, *tpos; 4257 enum i40iw_status_code ret; 4258 bool node_allocated = false; 4259 enum i40iw_quad_hash_manage_type op = 4260 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; 4261 4262 list_for_each_safe(pos, tpos, child_listen_list) { 4263 child_listen_node = 4264 list_entry(pos, 4265 struct i40iw_cm_listener, 4266 child_listen_list); 4267 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4268 goto set_qhash; 4269 } 4270 4271 /* if not found then add a child listener if interface is going up */ 4272 if (!ifup) 4273 return; 4274 child_listen_node = kmemdup(parent_listen_node, 4275 sizeof(*child_listen_node), GFP_ATOMIC); 4276 if (!child_listen_node) 4277 return; 4278 node_allocated = true; 4279 4280 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4281 4282set_qhash: 4283 memcpy(nfo->loc_addr, 4284 child_listen_node->loc_addr, 4285 sizeof(nfo->loc_addr)); 4286 nfo->vlan_id = child_listen_node->vlan_id; 4287 ret = i40iw_manage_qhash(iwdev, nfo, 4288 I40IW_QHASH_TYPE_TCP_SYN, 4289 op, 4290 NULL, false); 4291 if (!ret) { 4292 child_listen_node->qhash_set = ifup; 4293 if (node_allocated) 4294 list_add(&child_listen_node->child_listen_list, 4295 &parent_listen_node->child_listen_list); 4296 } else if (node_allocated) { 4297 kfree(child_listen_node); 4298 } 4299} 4300 4301/** 4302 * i40iw_cm_teardown_connections - teardown QPs 4303 * @iwdev: device pointer 4304 * @ipaddr: Pointer to IPv4 or IPv6 address 4305 * @ipv4: flag indicating IPv4 when true 4306 * @disconnect_all: flag indicating disconnect all QPs 4307 * teardown QPs where source or destination addr matches ip addr 4308 */ 4309void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr, 4310 struct i40iw_cm_info *nfo, 4311 bool disconnect_all) 4312{ 4313 struct i40iw_cm_core *cm_core = &iwdev->cm_core; 4314 struct list_head *list_core_temp; 4315 struct list_head *list_node; 4316 struct i40iw_cm_node *cm_node; 4317 unsigned long flags; 4318 struct list_head teardown_list; 4319 struct ib_qp_attr attr; 4320 4321 INIT_LIST_HEAD(&teardown_list); 4322 spin_lock_irqsave(&cm_core->ht_lock, flags); 4323 list_for_each_safe(list_node, list_core_temp, 4324 &cm_core->accelerated_list) { 4325 cm_node = container_of(list_node, struct i40iw_cm_node, list); 4326 if (disconnect_all || 4327 (nfo->vlan_id == cm_node->vlan_id && 4328 (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || 4329 !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { 4330 atomic_inc(&cm_node->ref_count); 4331 list_add(&cm_node->teardown_entry, &teardown_list); 4332 } 4333 } 4334 list_for_each_safe(list_node, list_core_temp, 4335 &cm_core->non_accelerated_list) { 4336 cm_node = container_of(list_node, struct i40iw_cm_node, list); 4337 if (disconnect_all || 4338 (nfo->vlan_id == cm_node->vlan_id && 4339 (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || 4340 !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { 4341 atomic_inc(&cm_node->ref_count); 4342 list_add(&cm_node->teardown_entry, &teardown_list); 4343 } 4344 } 4345 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 4346 4347 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4348 cm_node = container_of(list_node, struct i40iw_cm_node, 4349 teardown_entry); 4350 attr.qp_state = IB_QPS_ERR; 4351 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4352 if (iwdev->reset) 4353 i40iw_cm_disconn(cm_node->iwqp); 4354 i40iw_rem_ref_cm_node(cm_node); 4355 } 4356} 4357 4358/** 4359 * i40iw_ifdown_notify - process an ifdown on an interface 4360 * @iwdev: device pointer 4361 * @ipaddr: Pointer to IPv4 or IPv6 address 4362 * @ipv4: flag indicating IPv4 when true 4363 * @ifup: flag indicating interface up when true 4364 */ 4365void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev, 4366 u32 *ipaddr, bool ipv4, bool ifup) 4367{ 4368 struct i40iw_cm_core *cm_core = &iwdev->cm_core; 4369 unsigned long flags; 4370 struct i40iw_cm_listener *listen_node; 4371 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4372 struct i40iw_cm_info nfo; 4373 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4374 enum i40iw_status_code ret; 4375 enum i40iw_quad_hash_manage_type op = 4376 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; 4377 4378 nfo.vlan_id = vlan_id; 4379 nfo.ipv4 = ipv4; 4380 4381 /* Disable or enable qhash for listeners */ 4382 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4383 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { 4384 if (vlan_id == listen_node->vlan_id && 4385 (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) || 4386 !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) { 4387 memcpy(nfo.loc_addr, listen_node->loc_addr, 4388 sizeof(nfo.loc_addr)); 4389 nfo.loc_port = listen_node->loc_port; 4390 nfo.user_pri = listen_node->user_pri; 4391 if (!list_empty(&listen_node->child_listen_list)) { 4392 i40iw_qhash_ctrl(iwdev, 4393 listen_node, 4394 &nfo, 4395 ipaddr, ipv4, ifup); 4396 } else if (memcmp(listen_node->loc_addr, ip_zero, 4397 ipv4 ? 4 : 16)) { 4398 ret = i40iw_manage_qhash(iwdev, 4399 &nfo, 4400 I40IW_QHASH_TYPE_TCP_SYN, 4401 op, 4402 NULL, 4403 false); 4404 if (!ret) 4405 listen_node->qhash_set = ifup; 4406 } 4407 } 4408 } 4409 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4410 4411 /* teardown connected qp's on ifdown */ 4412 if (!ifup) 4413 i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4414} 4415