| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Faisal Latif | 17410 | 87.07% | 2 | 3.92% |
| Mustafa Ismail | 947 | 4.74% | 10 | 19.61% |
| Shiraz Saleem | 891 | 4.46% | 13 | 25.49% |
| Henry Orosco | 319 | 1.60% | 5 | 9.80% |
| Arnd Bergmann | 191 | 0.96% | 2 | 3.92% |
| Tatyana Nikolova | 147 | 0.74% | 7 | 13.73% |
| Kangjie Lu | 50 | 0.25% | 1 | 1.96% |
| Kees Cook | 14 | 0.07% | 1 | 1.96% |
| Michał Mirosław | 8 | 0.04% | 1 | 1.96% |
| Bhaktipriya Shridhar | 6 | 0.03% | 1 | 1.96% |
| Geliang Tang | 3 | 0.02% | 1 | 1.96% |
| shamir rabinovitch | 2 | 0.01% | 1 | 1.96% |
| Jia-Ju Bai | 2 | 0.01% | 2 | 3.92% |
| Kamal Heib | 2 | 0.01% | 1 | 1.96% |
| Yuval Shaia | 1 | 0.01% | 1 | 1.96% |
| Håkon Bugge | 1 | 0.01% | 1 | 1.96% |
| Bart Van Assche | 1 | 0.01% | 1 | 1.96% |
| Total | 19995 | 51 |
/******************************************************************************* * * Copyright (c) 2015-2016 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenFabrics.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * *******************************************************************************/ #include <linux/atomic.h> #include <linux/ip.h> #include <linux/tcp.h> #include <linux/init.h> #include <linux/if_arp.h> #include <linux/if_vlan.h> #include <linux/notifier.h> #include <linux/net.h> #include <linux/types.h> #include <linux/timer.h> #include <linux/time.h> #include <linux/delay.h> #include <linux/etherdevice.h> #include <linux/netdevice.h> #include <linux/random.h> #include <linux/list.h> #include <linux/threads.h> #include <linux/highmem.h> #include <net/arp.h> #include <net/ndisc.h> #include <net/neighbour.h> #include <net/route.h> #include <net/addrconf.h> #include <net/ip6_route.h> #include <net/ip_fib.h> #include <net/secure_seq.h> #include <net/tcp.h> #include <asm/checksum.h> #include "i40iw.h" static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); static void i40iw_cm_post_event(struct i40iw_cm_event *event); static void i40iw_disconnect_worker(struct work_struct *work); /** * i40iw_free_sqbuf - put back puda buffer if refcount = 0 * @vsi: pointer to vsi structure * @buf: puda buffer to free */ void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp) { struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; struct i40iw_puda_rsrc *ilq = vsi->ilq; if (!atomic_dec_return(&buf->refcount)) i40iw_puda_ret_bufpool(ilq, buf); } /** * i40iw_derive_hw_ird_setting - Calculate IRD * * @cm_ird: IRD of connection's node * * The ird from the connection is rounded to a supported HW * setting (2,8,32,64) and then encoded for ird_size field of * qp_ctx */ static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) { u8 encoded_ird_size; /* ird_size field is encoded in qp_ctx */ switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) { case I40IW_HW_IRD_SETTING_64: encoded_ird_size = 3; break; case I40IW_HW_IRD_SETTING_32: case I40IW_HW_IRD_SETTING_16: encoded_ird_size = 2; break; case I40IW_HW_IRD_SETTING_8: case I40IW_HW_IRD_SETTING_4: encoded_ird_size = 1; break; case I40IW_HW_IRD_SETTING_2: default: encoded_ird_size = 0; break; } return encoded_ird_size; } /** * i40iw_record_ird_ord - Record IRD/ORD passed in * @cm_node: connection's node * @conn_ird: connection IRD * @conn_ord: connection ORD */ static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird, u32 conn_ord) { if (conn_ird > I40IW_MAX_IRD_SIZE) conn_ird = I40IW_MAX_IRD_SIZE; if (conn_ord > I40IW_MAX_ORD_SIZE) conn_ord = I40IW_MAX_ORD_SIZE; else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) conn_ord = 1; cm_node->ird_size = conn_ird; cm_node->ord_size = conn_ord; } /** * i40iw_copy_ip_ntohl - change network to host ip * @dst: host ip * @src: big endian */ void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) { *dst++ = ntohl(*src++); *dst++ = ntohl(*src++); *dst++ = ntohl(*src++); *dst = ntohl(*src); } /** * i40iw_copy_ip_htonl - change host addr to network ip * @dst: host ip * @src: little endian */ static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) { *dst++ = htonl(*src++); *dst++ = htonl(*src++); *dst++ = htonl(*src++); *dst = htonl(*src); } /** * i40iw_fill_sockaddr4 - get addr info for passive connection * @cm_node: connection's node * @event: upper layer's cm event */ static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, struct iw_cm_event *event) { struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; laddr->sin_family = AF_INET; raddr->sin_family = AF_INET; laddr->sin_port = htons(cm_node->loc_port); raddr->sin_port = htons(cm_node->rem_port); laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); } /** * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side * @cm_node: connection's node * @event: upper layer's cm event */ static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, struct iw_cm_event *event) { struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; laddr6->sin6_family = AF_INET6; raddr6->sin6_family = AF_INET6; laddr6->sin6_port = htons(cm_node->loc_port); raddr6->sin6_port = htons(cm_node->rem_port); i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, cm_node->loc_addr); i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, cm_node->rem_addr); } /** * i40iw_get_addr_info * @cm_node: contains ip/tcp info * @cm_info: to get a copy of the cm_node ip/tcp info */ static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, struct i40iw_cm_info *cm_info) { cm_info->ipv4 = cm_node->ipv4; cm_info->vlan_id = cm_node->vlan_id; memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); cm_info->loc_port = cm_node->loc_port; cm_info->rem_port = cm_node->rem_port; cm_info->user_pri = cm_node->user_pri; } /** * i40iw_get_cmevent_info - for cm event upcall * @cm_node: connection's node * @cm_id: upper layers cm struct for the event * @event: upper layer's cm event */ static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, struct iw_cm_id *cm_id, struct iw_cm_event *event) { memcpy(&event->local_addr, &cm_id->m_local_addr, sizeof(event->local_addr)); memcpy(&event->remote_addr, &cm_id->m_remote_addr, sizeof(event->remote_addr)); if (cm_node) { event->private_data = (void *)cm_node->pdata_buf; event->private_data_len = (u8)cm_node->pdata.size; event->ird = cm_node->ird_size; event->ord = cm_node->ord_size; } } /** * i40iw_send_cm_event - upcall cm's event handler * @cm_node: connection's node * @cm_id: upper layer's cm info struct * @type: Event type to indicate * @status: status for the event type */ static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, struct iw_cm_id *cm_id, enum iw_cm_event_type type, int status) { struct iw_cm_event event; memset(&event, 0, sizeof(event)); event.event = type; event.status = status; switch (type) { case IW_CM_EVENT_CONNECT_REQUEST: if (cm_node->ipv4) i40iw_fill_sockaddr4(cm_node, &event); else i40iw_fill_sockaddr6(cm_node, &event); event.provider_data = (void *)cm_node; event.private_data = (void *)cm_node->pdata_buf; event.private_data_len = (u8)cm_node->pdata.size; event.ird = cm_node->ird_size; break; case IW_CM_EVENT_CONNECT_REPLY: i40iw_get_cmevent_info(cm_node, cm_id, &event); break; case IW_CM_EVENT_ESTABLISHED: event.ird = cm_node->ird_size; event.ord = cm_node->ord_size; break; case IW_CM_EVENT_DISCONNECT: break; case IW_CM_EVENT_CLOSE: break; default: i40iw_pr_err("event type received type = %d\n", type); return -1; } return cm_id->event_handler(cm_id, &event); } /** * i40iw_create_event - create cm event * @cm_node: connection's node * @type: Event type to generate */ static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, enum i40iw_cm_event_type type) { struct i40iw_cm_event *event; if (!cm_node->cm_id) return NULL; event = kzalloc(sizeof(*event), GFP_ATOMIC); if (!event) return NULL; event->type = type; event->cm_node = cm_node; memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); event->cm_info.rem_port = cm_node->rem_port; event->cm_info.loc_port = cm_node->loc_port; event->cm_info.cm_id = cm_node->cm_id; i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node, event, type, event->cm_info.loc_addr, event->cm_info.rem_addr); i40iw_cm_post_event(event); return event; } /** * i40iw_free_retrans_entry - free send entry * @cm_node: connection's node */ static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) { struct i40iw_device *iwdev = cm_node->iwdev; struct i40iw_timer_entry *send_entry; send_entry = cm_node->send_entry; if (send_entry) { cm_node->send_entry = NULL; i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf); kfree(send_entry); atomic_dec(&cm_node->ref_count); } } /** * i40iw_cleanup_retrans_entry - free send entry with lock * @cm_node: connection's node */ static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) { unsigned long flags; spin_lock_irqsave(&cm_node->retrans_list_lock, flags); i40iw_free_retrans_entry(cm_node); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); } /** * i40iw_form_cm_frame - get a free packet and build frame * @cm_node: connection's node ionfo to use in frame * @options: pointer to options info * @hdr: pointer mpa header * @pdata: pointer to private data * @flags: indicates FIN or ACK */ static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, struct i40iw_kmem_info *options, struct i40iw_kmem_info *hdr, struct i40iw_kmem_info *pdata, u8 flags) { struct i40iw_puda_buf *sqbuf; struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; u8 *buf; struct tcphdr *tcph; struct iphdr *iph; struct ipv6hdr *ip6h; struct ethhdr *ethh; u16 packetsize; u16 eth_hlen = ETH_HLEN; u32 opts_len = 0; u32 pd_len = 0; u32 hdr_len = 0; u16 vtag; sqbuf = i40iw_puda_get_bufpool(vsi->ilq); if (!sqbuf) return NULL; buf = sqbuf->mem.va; if (options) opts_len = (u32)options->size; if (hdr) hdr_len = hdr->size; if (pdata) pd_len = pdata->size; if (cm_node->vlan_id <= VLAN_VID_MASK) eth_hlen += 4; if (cm_node->ipv4) packetsize = sizeof(*iph) + sizeof(*tcph); else packetsize = sizeof(*ip6h) + sizeof(*tcph); packetsize += opts_len + hdr_len + pd_len; memset(buf, 0x00, eth_hlen + packetsize); sqbuf->totallen = packetsize + eth_hlen; sqbuf->maclen = eth_hlen; sqbuf->tcphlen = sizeof(*tcph) + opts_len; sqbuf->scratch = (void *)cm_node; ethh = (struct ethhdr *)buf; buf += eth_hlen; if (cm_node->ipv4) { sqbuf->ipv4 = true; iph = (struct iphdr *)buf; buf += sizeof(*iph); tcph = (struct tcphdr *)buf; buf += sizeof(*tcph); ether_addr_copy(ethh->h_dest, cm_node->rem_mac); ether_addr_copy(ethh->h_source, cm_node->loc_mac); if (cm_node->vlan_id <= VLAN_VID_MASK) { ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); } else { ethh->h_proto = htons(ETH_P_IP); } iph->version = IPVERSION; iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ iph->tos = cm_node->tos; iph->tot_len = htons(packetsize); iph->id = htons(++cm_node->tcp_cntxt.loc_id); iph->frag_off = htons(0x4000); iph->ttl = 0x40; iph->protocol = IPPROTO_TCP; iph->saddr = htonl(cm_node->loc_addr[0]); iph->daddr = htonl(cm_node->rem_addr[0]); } else { sqbuf->ipv4 = false; ip6h = (struct ipv6hdr *)buf; buf += sizeof(*ip6h); tcph = (struct tcphdr *)buf; buf += sizeof(*tcph); ether_addr_copy(ethh->h_dest, cm_node->rem_mac); ether_addr_copy(ethh->h_source, cm_node->loc_mac); if (cm_node->vlan_id <= VLAN_VID_MASK) { ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); } else { ethh->h_proto = htons(ETH_P_IPV6); } ip6h->version = 6; ip6h->priority = cm_node->tos >> 4; ip6h->flow_lbl[0] = cm_node->tos << 4; ip6h->flow_lbl[1] = 0; ip6h->flow_lbl[2] = 0; ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); ip6h->nexthdr = 6; ip6h->hop_limit = 128; i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, cm_node->loc_addr); i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, cm_node->rem_addr); } tcph->source = htons(cm_node->loc_port); tcph->dest = htons(cm_node->rem_port); tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); if (flags & SET_ACK) { cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); tcph->ack = 1; } else { tcph->ack_seq = 0; } if (flags & SET_SYN) { cm_node->tcp_cntxt.loc_seq_num++; tcph->syn = 1; } else { cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; } if (flags & SET_FIN) { cm_node->tcp_cntxt.loc_seq_num++; tcph->fin = 1; } if (flags & SET_RST) tcph->rst = 1; tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); sqbuf->tcphlen = tcph->doff << 2; tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); tcph->urg_ptr = 0; if (opts_len) { memcpy(buf, options->addr, opts_len); buf += opts_len; } if (hdr_len) { memcpy(buf, hdr->addr, hdr_len); buf += hdr_len; } if (pdata && pdata->addr) memcpy(buf, pdata->addr, pdata->size); atomic_set(&sqbuf->refcount, 1); return sqbuf; } /** * i40iw_send_reset - Send RST packet * @cm_node: connection's node */ int i40iw_send_reset(struct i40iw_cm_node *cm_node) { struct i40iw_puda_buf *sqbuf; int flags = SET_RST | SET_ACK; sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); if (!sqbuf) { i40iw_pr_err("no sqbuf\n"); return -1; } return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); } /** * i40iw_active_open_err - send event for active side cm error * @cm_node: connection's node * @reset: Flag to send reset or not */ static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) { i40iw_cleanup_retrans_entry(cm_node); cm_node->cm_core->stats_connect_errs++; if (reset) { i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "%s cm_node=%p state=%d\n", __func__, cm_node, cm_node->state); atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); } cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); } /** * i40iw_passive_open_err - handle passive side cm error * @cm_node: connection's node * @reset: send reset or just free cm_node */ static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) { i40iw_cleanup_retrans_entry(cm_node); cm_node->cm_core->stats_passive_errs++; cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "%s cm_node=%p state =%d\n", __func__, cm_node, cm_node->state); if (reset) i40iw_send_reset(cm_node); else i40iw_rem_ref_cm_node(cm_node); } /** * i40iw_event_connect_error - to create connect error event * @event: cm information for connect event */ static void i40iw_event_connect_error(struct i40iw_cm_event *event) { struct i40iw_qp *iwqp; struct iw_cm_id *cm_id; cm_id = event->cm_node->cm_id; if (!cm_id) return; iwqp = cm_id->provider_data; if (!iwqp || !iwqp->iwdev) return; iwqp->cm_id = NULL; cm_id->provider_data = NULL; i40iw_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, -ECONNRESET); cm_id->rem_ref(cm_id); i40iw_rem_ref_cm_node(event->cm_node); } /** * i40iw_process_options * @cm_node: connection's node * @optionsloc: point to start of options * @optionsize: size of all options * @syn_packet: flag if syn packet */ static int i40iw_process_options(struct i40iw_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet) { u32 tmp; u32 offset = 0; union all_known_options *all_options; char got_mss_option = 0; while (offset < optionsize) { all_options = (union all_known_options *)(optionsloc + offset); switch (all_options->as_base.optionnum) { case OPTION_NUMBER_END: offset = optionsize; break; case OPTION_NUMBER_NONE: offset += 1; continue; case OPTION_NUMBER_MSS: i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n", __func__, all_options->as_mss.length, offset, optionsize); got_mss_option = 1; if (all_options->as_mss.length != 4) return -1; tmp = ntohs(all_options->as_mss.mss); if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) cm_node->tcp_cntxt.mss = tmp; break; case OPTION_NUMBER_WINDOW_SCALE: cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount; break; default: i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "TCP Option not understood: %x\n", all_options->as_base.optionnum); break; } offset += all_options->as_base.length; } if (!got_mss_option && syn_packet) cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; return 0; } /** * i40iw_handle_tcp_options - * @cm_node: connection's node * @tcph: pointer tcp header * @optionsize: size of options rcvd * @passive: active or passive flag */ static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, struct tcphdr *tcph, int optionsize, int passive) { u8 *optionsloc = (u8 *)&tcph[1]; if (optionsize) { if (i40iw_process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) { i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "%s: Node %p, Sending RESET\n", __func__, cm_node); if (passive) i40iw_passive_open_err(cm_node, true); else i40iw_active_open_err(cm_node, true); return -1; } } cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << cm_node->tcp_cntxt.snd_wscale; if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; return 0; } /** * i40iw_build_mpa_v1 - build a MPA V1 frame * @cm_node: connection's node * @mpa_key: to do read0 or write0 */ static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; switch (mpa_key) { case MPA_KEY_REQUEST: memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); break; case MPA_KEY_REPLY: memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); break; default: break; } mpa_frame->flags = IETF_MPA_FLAGS_CRC; mpa_frame->rev = cm_node->mpa_frame_rev; mpa_frame->priv_data_len = htons(cm_node->pdata.size); } /** * i40iw_build_mpa_v2 - build a MPA V2 frame * @cm_node: connection's node * @start_addr: buffer start address * @mpa_key: to do read0 or write0 */ static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; u16 ctrl_ird, ctrl_ord; /* initialize the upper 5 bytes of the frame */ i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); mpa_frame->flags |= IETF_MPA_V2_FLAG; mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); /* initialize RTR msg */ if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { ctrl_ird = IETF_NO_IRD_ORD; ctrl_ord = IETF_NO_IRD_ORD; } else { ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? IETF_NO_IRD_ORD : cm_node->ird_size; ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? IETF_NO_IRD_ORD : cm_node->ord_size; } ctrl_ird |= IETF_PEER_TO_PEER; switch (mpa_key) { case MPA_KEY_REQUEST: ctrl_ord |= IETF_RDMA0_WRITE; ctrl_ord |= IETF_RDMA0_READ; break; case MPA_KEY_REPLY: switch (cm_node->send_rdma0_op) { case SEND_RDMA_WRITE_ZERO: ctrl_ord |= IETF_RDMA0_WRITE; break; case SEND_RDMA_READ_ZERO: ctrl_ord |= IETF_RDMA0_READ; break; } break; default: break; } rtr_msg->ctrl_ird = htons(ctrl_ird); rtr_msg->ctrl_ord = htons(ctrl_ord); } /** * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 * @cm_node: connection's node * @mpa: mpa: data buffer * @mpa_key: to do read0 or write0 */ static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, struct i40iw_kmem_info *mpa, u8 mpa_key) { int hdr_len = 0; switch (cm_node->mpa_frame_rev) { case IETF_MPA_V1: hdr_len = sizeof(struct ietf_mpa_v1); i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); break; case IETF_MPA_V2: hdr_len = sizeof(struct ietf_mpa_v2); i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); break; default: break; } return hdr_len; } /** * i40iw_send_mpa_request - active node send mpa request to passive node * @cm_node: connection's node */ static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) { struct i40iw_puda_buf *sqbuf; if (!cm_node) { i40iw_pr_err("cm_node == NULL\n"); return -1; } cm_node->mpa_hdr.addr = &cm_node->mpa_frame; cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, &cm_node->mpa_hdr, MPA_KEY_REQUEST); if (!cm_node->mpa_hdr.size) { i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); return -1; } sqbuf = i40iw_form_cm_frame(cm_node, NULL, &cm_node->mpa_hdr, &cm_node->pdata, SET_ACK); if (!sqbuf) { i40iw_pr_err("sq_buf == NULL\n"); return -1; } return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); } /** * i40iw_send_mpa_reject - * @cm_node: connection's node * @pdata: reject data for connection * @plen: length of reject data */ static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) { struct i40iw_puda_buf *sqbuf; struct i40iw_kmem_info priv_info; cm_node->mpa_hdr.addr = &cm_node->mpa_frame; cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, &cm_node->mpa_hdr, MPA_KEY_REPLY); cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; priv_info.addr = (void *)pdata; priv_info.size = plen; sqbuf = i40iw_form_cm_frame(cm_node, NULL, &cm_node->mpa_hdr, &priv_info, SET_ACK | SET_FIN); if (!sqbuf) { i40iw_pr_err("no sqbuf\n"); return -ENOMEM; } cm_node->state = I40IW_CM_STATE_FIN_WAIT1; return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); } /** * recv_mpa - process an IETF MPA frame * @cm_node: connection's node * @buffer: Data pointer * @type: to return accept or reject * @len: Len of mpa buffer */ static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) { struct ietf_mpa_v1 *mpa_frame; struct ietf_mpa_v2 *mpa_v2_frame; struct ietf_rtr_msg *rtr_msg; int mpa_hdr_len; int priv_data_len; *type = I40IW_MPA_REQUEST_ACCEPT; if (len < sizeof(struct ietf_mpa_v1)) { i40iw_pr_err("ietf buffer small (%x)\n", len); return -1; } mpa_frame = (struct ietf_mpa_v1 *)buffer; mpa_hdr_len = sizeof(struct ietf_mpa_v1); priv_data_len = ntohs(mpa_frame->priv_data_len); if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { i40iw_pr_err("large pri_data %d\n", priv_data_len); return -1; } if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); return -1; } if (mpa_frame->rev > cm_node->mpa_frame_rev) { i40iw_pr_err("rev %d\n", mpa_frame->rev); return -1; } cm_node->mpa_frame_rev = mpa_frame->rev; if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { i40iw_pr_err("Unexpected MPA Key received\n"); return -1; } } else { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { i40iw_pr_err("Unexpected MPA Key received\n"); return -1; } } if (priv_data_len + mpa_hdr_len > len) { i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", priv_data_len, mpa_hdr_len, len); return -1; } if (len > MAX_CM_BUFFER) { i40iw_pr_err("ietf buffer large len = %d\n", len); return -1; } switch (mpa_frame->rev) { case IETF_MPA_V2:{ u16 ird_size; u16 ord_size; u16 ctrl_ord; u16 ctrl_ird; mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; mpa_hdr_len += IETF_RTR_MSG_SIZE; rtr_msg = &mpa_v2_frame->rtr_msg; /* parse rtr message */ ctrl_ord = ntohs(rtr_msg->ctrl_ord); ctrl_ird = ntohs(rtr_msg->ctrl_ird); ird_size = ctrl_ird & IETF_NO_IRD_ORD; ord_size = ctrl_ord & IETF_NO_IRD_ORD; if (!(ctrl_ird & IETF_PEER_TO_PEER)) return -1; if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; goto negotiate_done; } if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { /* responder */ if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) cm_node->ird_size = 1; if (cm_node->ord_size > ird_size) cm_node->ord_size = ird_size; } else { /* initiator */ if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) return -1; if (cm_node->ord_size > ird_size) cm_node->ord_size = ird_size; if (cm_node->ird_size < ord_size) /* no resources available */ return -1; } negotiate_done: if (ctrl_ord & IETF_RDMA0_READ) cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; else if (ctrl_ord & IETF_RDMA0_WRITE) cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; else /* Not supported RDMA0 operation */ return -1; i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "MPAV2: Negotiated ORD: %d, IRD: %d\n", cm_node->ord_size, cm_node->ird_size); break; } break; case IETF_MPA_V1: default: break; } memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); cm_node->pdata.size = priv_data_len; if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) *type = I40IW_MPA_REQUEST_REJECT; if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) cm_node->snd_mark_en = true; return 0; } /** * i40iw_schedule_cm_timer * @@cm_node: connection's node * @sqbuf: buffer to send * @type: if it is send or close * @send_retrans: if rexmits to be done * @close_when_complete: is cm_node to be removed * * note - cm_node needs to be protected before calling this. Encase in: * i40iw_rem_ref_cm_node(cm_core, cm_node); * i40iw_schedule_cm_timer(...) * atomic_inc(&cm_node->ref_count); */ int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *sqbuf, enum i40iw_timer_type type, int send_retrans, int close_when_complete) { struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; struct i40iw_cm_core *cm_core = cm_node->cm_core; struct i40iw_timer_entry *new_send; int ret = 0; u32 was_timer_set; unsigned long flags; new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); if (!new_send) { if (type != I40IW_TIMER_TYPE_CLOSE) i40iw_free_sqbuf(vsi, (void *)sqbuf); return -ENOMEM; } new_send->retrycount = I40IW_DEFAULT_RETRYS; new_send->retranscount = I40IW_DEFAULT_RETRANS; new_send->sqbuf = sqbuf; new_send->timetosend = jiffies; new_send->type = type; new_send->send_retrans = send_retrans; new_send->close_when_complete = close_when_complete; if (type == I40IW_TIMER_TYPE_CLOSE) { new_send->timetosend += (HZ / 10); if (cm_node->close_entry) { kfree(new_send); i40iw_pr_err("already close entry\n"); return -EINVAL; } cm_node->close_entry = new_send; } if (type == I40IW_TIMER_TYPE_SEND) { spin_lock_irqsave(&cm_node->retrans_list_lock, flags); cm_node->send_entry = new_send; atomic_inc(&cm_node->ref_count); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; atomic_inc(&sqbuf->refcount); i40iw_puda_send_buf(vsi->ilq, sqbuf); if (!send_retrans) { i40iw_cleanup_retrans_entry(cm_node); if (close_when_complete) i40iw_rem_ref_cm_node(cm_node); return ret; } } spin_lock_irqsave(&cm_core->ht_lock, flags); was_timer_set = timer_pending(&cm_core->tcp_timer); if (!was_timer_set) { cm_core->tcp_timer.expires = new_send->timetosend; add_timer(&cm_core->tcp_timer); } spin_unlock_irqrestore(&cm_core->ht_lock, flags); return ret; } /** * i40iw_retrans_expired - Could not rexmit the packet * @cm_node: connection's node */ static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) { struct iw_cm_id *cm_id = cm_node->cm_id; enum i40iw_cm_node_state state = cm_node->state; cm_node->state = I40IW_CM_STATE_CLOSED; switch (state) { case I40IW_CM_STATE_SYN_RCVD: case I40IW_CM_STATE_CLOSING: i40iw_rem_ref_cm_node(cm_node); break; case I40IW_CM_STATE_FIN_WAIT1: case I40IW_CM_STATE_LAST_ACK: if (cm_node->cm_id) cm_id->rem_ref(cm_id); i40iw_send_reset(cm_node); break; default: atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); break; } } /** * i40iw_handle_close_entry - for handling retry/timeouts * @cm_node: connection's node * @rem_node: flag for remove cm_node */ static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) { struct i40iw_timer_entry *close_entry = cm_node->close_entry; struct iw_cm_id *cm_id = cm_node->cm_id; struct i40iw_qp *iwqp; unsigned long flags; if (!close_entry) return; iwqp = (struct i40iw_qp *)close_entry->sqbuf; if (iwqp) { spin_lock_irqsave(&iwqp->lock, flags); if (iwqp->cm_id) { iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; iwqp->last_aeq = I40IW_AE_RESET_SENT; iwqp->ibqp_state = IB_QPS_ERR; spin_unlock_irqrestore(&iwqp->lock, flags); i40iw_cm_disconn(iwqp); } else { spin_unlock_irqrestore(&iwqp->lock, flags); } } else if (rem_node) { /* TIME_WAIT state */ i40iw_rem_ref_cm_node(cm_node); } if (cm_id) cm_id->rem_ref(cm_id); kfree(close_entry); cm_node->close_entry = NULL; } /** * i40iw_build_timer_list - Add cm_nodes to timer list * @timer_list: ptr to timer list * @hte: ptr to accelerated or non-accelerated list */ static void i40iw_build_timer_list(struct list_head *timer_list, struct list_head *hte) { struct i40iw_cm_node *cm_node; struct list_head *list_core_temp, *list_node; list_for_each_safe(list_node, list_core_temp, hte) { cm_node = container_of(list_node, struct i40iw_cm_node, list); if (cm_node->close_entry || cm_node->send_entry) { atomic_inc(&cm_node->ref_count); list_add(&cm_node->timer_entry, timer_list); } } } /** * i40iw_cm_timer_tick - system's timer expired callback * @pass: Pointing to cm_core */ static void i40iw_cm_timer_tick(struct timer_list *t) { unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; struct i40iw_cm_node *cm_node; struct i40iw_timer_entry *send_entry, *close_entry; struct list_head *list_core_temp; struct i40iw_sc_vsi *vsi; struct list_head *list_node; struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); u32 settimer = 0; unsigned long timetosend; unsigned long flags; struct list_head timer_list; INIT_LIST_HEAD(&timer_list); spin_lock_irqsave(&cm_core->ht_lock, flags); i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list); i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list); spin_unlock_irqrestore(&cm_core->ht_lock, flags); list_for_each_safe(list_node, list_core_temp, &timer_list) { cm_node = container_of(list_node, struct i40iw_cm_node, timer_entry); close_entry = cm_node->close_entry; if (close_entry) { if (time_after(close_entry->timetosend, jiffies)) { if (nexttimeout > close_entry->timetosend || !settimer) { nexttimeout = close_entry->timetosend; settimer = 1; } } else { i40iw_handle_close_entry(cm_node, 1); } } spin_lock_irqsave(&cm_node->retrans_list_lock, flags); send_entry = cm_node->send_entry; if (!send_entry) goto done; if (time_after(send_entry->timetosend, jiffies)) { if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { if ((nexttimeout > send_entry->timetosend) || !settimer) { nexttimeout = send_entry->timetosend; settimer = 1; } } else { i40iw_free_retrans_entry(cm_node); } goto done; } if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || (cm_node->state == I40IW_CM_STATE_CLOSED)) { i40iw_free_retrans_entry(cm_node); goto done; } if (!send_entry->retranscount || !send_entry->retrycount) { i40iw_free_retrans_entry(cm_node); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); i40iw_retrans_expired(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; spin_lock_irqsave(&cm_node->retrans_list_lock, flags); goto done; } spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); vsi = &cm_node->iwdev->vsi; if (!cm_node->ack_rcvd) { atomic_inc(&send_entry->sqbuf->refcount); i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); cm_node->cm_core->stats_pkt_retrans++; } spin_lock_irqsave(&cm_node->retrans_list_lock, flags); if (send_entry->send_retrans) { send_entry->retranscount--; timetosend = (I40IW_RETRY_TIMEOUT << (I40IW_DEFAULT_RETRANS - send_entry->retranscount)); send_entry->timetosend = jiffies + min(timetosend, I40IW_MAX_TIMEOUT); if (nexttimeout > send_entry->timetosend || !settimer) { nexttimeout = send_entry->timetosend; settimer = 1; } } else { int close_when_complete; close_when_complete = send_entry->close_when_complete; i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "cm_node=%p state=%d\n", cm_node, cm_node->state); i40iw_free_retrans_entry(cm_node); if (close_when_complete) i40iw_rem_ref_cm_node(cm_node); } done: spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); i40iw_rem_ref_cm_node(cm_node); } if (settimer) { spin_lock_irqsave(&cm_core->ht_lock, flags); if (!timer_pending(&cm_core->tcp_timer)) { cm_core->tcp_timer.expires = nexttimeout; add_timer(&cm_core->tcp_timer); } spin_unlock_irqrestore(&cm_core->ht_lock, flags); } } /** * i40iw_send_syn - send SYN packet * @cm_node: connection's node * @sendack: flag to set ACK bit or not */ int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) { struct i40iw_puda_buf *sqbuf; int flags = SET_SYN; char optionsbuffer[sizeof(struct option_mss) + sizeof(struct option_windowscale) + sizeof(struct option_base) + TCP_OPTIONS_PADDING]; struct i40iw_kmem_info opts; int optionssize = 0; /* Sending MSS option */ union all_known_options *options; opts.addr = optionsbuffer; if (!cm_node) { i40iw_pr_err("no cm_node\n"); return -EINVAL; } options = (union all_known_options *)&optionsbuffer[optionssize]; options->as_mss.optionnum = OPTION_NUMBER_MSS; options->as_mss.length = sizeof(struct option_mss); options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); optionssize += sizeof(struct option_mss); options = (union all_known_options *)&optionsbuffer[optionssize]; options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; options->as_windowscale.length = sizeof(struct option_windowscale); options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; optionssize += sizeof(struct option_windowscale); options = (union all_known_options *)&optionsbuffer[optionssize]; options->as_end = OPTION_NUMBER_END; optionssize += 1; if (sendack) flags |= SET_ACK; opts.size = optionssize; sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); if (!sqbuf) { i40iw_pr_err("no sqbuf\n"); return -1; } return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); } /** * i40iw_send_ack - Send ACK packet * @cm_node: connection's node */ static void i40iw_send_ack(struct i40iw_cm_node *cm_node) { struct i40iw_puda_buf *sqbuf; struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); if (sqbuf) i40iw_puda_send_buf(vsi->ilq, sqbuf); else i40iw_pr_err("no sqbuf\n"); } /** * i40iw_send_fin - Send FIN pkt * @cm_node: connection's node */ static int i40iw_send_fin(struct i40iw_cm_node *cm_node) { struct i40iw_puda_buf *sqbuf; sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); if (!sqbuf) { i40iw_pr_err("no sqbuf\n"); return -1; } return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); } /** * i40iw_find_node - find a cm node that matches the reference cm node * @cm_core: cm's core * @rem_port: remote tcp port num * @rem_addr: remote ip addr * @loc_port: local tcp port num * @loc_addr: loc ip addr * @add_refcnt: flag to increment refcount of cm_node * @accelerated_list: flag for accelerated vs non-accelerated list to search */ struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, u16 rem_port, u32 *rem_addr, u16 loc_port, u32 *loc_addr, bool add_refcnt, bool accelerated_list) { struct list_head *hte; struct i40iw_cm_node *cm_node; unsigned long flags; hte = accelerated_list ? &cm_core->accelerated_list : &cm_core->non_accelerated_list; /* walk list and find cm_node associated with this session ID */ spin_lock_irqsave(&cm_core->ht_lock, flags); list_for_each_entry(cm_node, hte, list) { if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && (cm_node->loc_port == loc_port) && !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) && (cm_node->rem_port == rem_port)) { if (add_refcnt) atomic_inc(&cm_node->ref_count); spin_unlock_irqrestore(&cm_core->ht_lock, flags); return cm_node; } } spin_unlock_irqrestore(&cm_core->ht_lock, flags); /* no owner node */ return NULL; } /** * i40iw_find_listener - find a cm node listening on this addr-port pair * @cm_core: cm's core * @dst_port: listener tcp port num * @dst_addr: listener ip addr * @listener_state: state to match with listen node's */ static struct i40iw_cm_listener *i40iw_find_listener( struct i40iw_cm_core *cm_core, u32 *dst_addr, u16 dst_port, u16 vlan_id, enum i40iw_cm_listener_state listener_state) { struct i40iw_cm_listener *listen_node; static const u32 ip_zero[4] = { 0, 0, 0, 0 }; u32 listen_addr[4]; u16 listen_port; unsigned long flags; /* walk list and find cm_node associated with this session ID */ spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); listen_port = listen_node->loc_port; /* compare node pair, return node handle if a match */ if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && (listen_port == dst_port) && (listener_state & listen_node->listener_state)) { atomic_inc(&listen_node->ref_count); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); return listen_node; } } spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); return NULL; } /** * i40iw_add_hte_node - add a cm node to the hash table * @cm_core: cm's core * @cm_node: connection's node */ static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, struct i40iw_cm_node *cm_node) { unsigned long flags; if (!cm_node || !cm_core) { i40iw_pr_err("cm_node or cm_core == NULL\n"); return; } spin_lock_irqsave(&cm_core->ht_lock, flags); list_add_tail(&cm_node->list, &cm_core->non_accelerated_list); spin_unlock_irqrestore(&cm_core->ht_lock, flags); } /** * i40iw_find_port - find port that matches reference port * @hte: ptr to accelerated or non-accelerated list * @accelerated_list: flag for accelerated vs non-accelerated list */ static bool i40iw_find_port(struct list_head *hte, u16 port) { struct i40iw_cm_node *cm_node; list_for_each_entry(cm_node, hte, list) { if (cm_node->loc_port == port) return true; } return false; } /** * i40iw_port_in_use - determine if port is in use * @cm_core: cm's core * @port: port number */ bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port) { struct i40iw_cm_listener *listen_node; unsigned long flags; spin_lock_irqsave(&cm_core->ht_lock, flags); if (i40iw_find_port(&cm_core->accelerated_list, port) || i40iw_find_port(&cm_core->non_accelerated_list, port)) { spin_unlock_irqrestore(&cm_core->ht_lock, flags); return true; } spin_unlock_irqrestore(&cm_core->ht_lock, flags); spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { if (listen_node->loc_port == port) { spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); return true; } } spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); return false; } /** * i40iw_del_multiple_qhash - Remove qhash and child listens * @iwdev: iWarp device * @cm_info: CM info for parent listen node * @cm_parent_listen_node: The parent listen node */ static enum i40iw_status_code i40iw_del_multiple_qhash( struct i40iw_device *iwdev, struct i40iw_cm_info *cm_info, struct i40iw_cm_listener *cm_parent_listen_node) { struct i40iw_cm_listener *child_listen_node; enum i40iw_status_code ret = I40IW_ERR_CONFIG; struct list_head *pos, *tpos; unsigned long flags; spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); if (child_listen_node->ipv4) i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "removing child listen for IP=%pI4, port=%d, vlan=%d\n", child_listen_node->loc_addr, child_listen_node->loc_port, child_listen_node->vlan_id); else i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "removing child listen for IP=%pI6, port=%d, vlan=%d\n", child_listen_node->loc_addr, child_listen_node->loc_port, child_listen_node->vlan_id); list_del(pos); memcpy(cm_info->loc_addr, child_listen_node->loc_addr, sizeof(cm_info->loc_addr)); cm_info->vlan_id = child_listen_node->vlan_id; if (child_listen_node->qhash_set) { ret = i40iw_manage_qhash(iwdev, cm_info, I40IW_QHASH_TYPE_TCP_SYN, I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); child_listen_node->qhash_set = false; } else { ret = I40IW_SUCCESS; } i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "freed pointer = %p\n", child_listen_node); kfree(child_listen_node); cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; } spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); return ret; } /** * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan * @addr: local IPv6 address * @vlan_id: vlan id for the given IPv6 address * * Returns the net_device of the IPv6 address and also sets the * vlan id for that address. */ static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id) { struct net_device *ip_dev = NULL; struct in6_addr laddr6; if (!IS_ENABLED(CONFIG_IPV6)) return NULL; i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); if (vlan_id) *vlan_id = I40IW_NO_VLAN; rcu_read_lock(); for_each_netdev_rcu(&init_net, ip_dev) { if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { if (vlan_id) *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); break; } } rcu_read_unlock(); return ip_dev; } /** * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address * @addr: local IPv4 address */ static u16 i40iw_get_vlan_ipv4(u32 *addr) { struct net_device *netdev; u16 vlan_id = I40IW_NO_VLAN; netdev = ip_dev_find(&init_net, htonl(addr[0])); if (netdev) { vlan_id = rdma_vlan_dev_vlan_id(netdev); dev_put(netdev); } return vlan_id; } /** * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 * @iwdev: iWarp device * @cm_info: CM info for parent listen node * @cm_parent_listen_node: The parent listen node * * Adds a qhash and a child listen node for every IPv6 address * on the adapter and adds the associated qhash filter */ static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, struct i40iw_cm_info *cm_info, struct i40iw_cm_listener *cm_parent_listen_node) { struct net_device *ip_dev; struct inet6_dev *idev; struct inet6_ifaddr *ifp, *tmp; enum i40iw_status_code ret = 0; struct i40iw_cm_listener *child_listen_node; unsigned long flags; rtnl_lock(); for_each_netdev(&init_net, ip_dev) { if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { idev = __in6_dev_get(ip_dev); if (!idev) { i40iw_pr_err("idev == NULL\n"); break; } list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "IP=%pI6, vlan_id=%d, MAC=%pM\n", &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), ip_dev->dev_addr); child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "Allocating child listener %p\n", child_listen_node); if (!child_listen_node) { ret = I40IW_ERR_NO_MEMORY; goto exit; } cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); cm_parent_listen_node->vlan_id = cm_info->vlan_id; memcpy(child_listen_node, cm_parent_listen_node, sizeof(*child_listen_node)); i40iw_copy_ip_ntohl(child_listen_node->loc_addr, ifp->addr.in6_u.u6_addr32); memcpy(cm_info->loc_addr, child_listen_node->loc_addr, sizeof(cm_info->loc_addr)); ret = i40iw_manage_qhash(iwdev, cm_info, I40IW_QHASH_TYPE_TCP_SYN, I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true); if (!ret) { child_listen_node->qhash_set = true; spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); list_add(&child_listen_node->child_listen_list, &cm_parent_listen_node->child_listen_list); spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); cm_parent_listen_node->cm_core->stats_listen_nodes_created++; } else { kfree(child_listen_node); } } } } exit: rtnl_unlock(); return ret; } /** * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 * @iwdev: iWarp device * @cm_info: CM info for parent listen node * @cm_parent_listen_node: The parent listen node * * Adds a qhash and a child listen node for every IPv4 address * on the adapter and adds the associated qhash filter */ static enum i40iw_status_code i40iw_add_mqh_4( struct i40iw_device *iwdev, struct i40iw_cm_info *cm_info, struct i40iw_cm_listener *cm_parent_listen_node) { struct net_device *dev; struct in_device *idev; struct i40iw_cm_listener *child_listen_node; enum i40iw_status_code ret = 0; unsigned long flags; rtnl_lock(); for_each_netdev(&init_net, dev) { if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { idev = in_dev_get(dev); for_ifa(idev) { i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", &ifa->ifa_address, rdma_vlan_dev_vlan_id(dev), dev->dev_addr); child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); cm_parent_listen_node->cm_core->stats_listen_nodes_created++; i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "Allocating child listener %p\n", child_listen_node); if (!child_listen_node) { in_dev_put(idev); ret = I40IW_ERR_NO_MEMORY; goto exit; } cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); cm_parent_listen_node->vlan_id = cm_info->vlan_id; memcpy(child_listen_node, cm_parent_listen_node, sizeof(*child_listen_node)); child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); memcpy(cm_info->loc_addr, child_listen_node->loc_addr, sizeof(cm_info->loc_addr)); ret = i40iw_manage_qhash(iwdev, cm_info, I40IW_QHASH_TYPE_TCP_SYN, I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true); if (!ret) { child_listen_node->qhash_set = true; spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); list_add(&child_listen_node->child_listen_list, &cm_parent_listen_node->child_listen_list); spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); } else { kfree(child_listen_node); cm_parent_listen_node->cm_core->stats_listen_nodes_created--; } } endfor_ifa(idev); in_dev_put(idev); } } exit: rtnl_unlock(); return ret; } /** * i40iw_dec_refcnt_listen - delete listener and associated cm nodes * @cm_core: cm's core * @free_hanging_nodes: to free associated cm_nodes * @apbvt_del: flag to delete the apbvt */ static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, struct i40iw_cm_listener *listener, int free_hanging_nodes, bool apbvt_del) { int ret = -EINVAL; int err = 0; struct list_head *list_pos; struct list_head *list_temp; struct i40iw_cm_node *cm_node; struct list_head reset_list; struct i40iw_cm_info nfo; struct i40iw_cm_node *loopback; enum i40iw_cm_node_state old_state; unsigned long flags; /* free non-accelerated child nodes for this listener */ INIT_LIST_HEAD(&reset_list); if (free_hanging_nodes) { spin_lock_irqsave(&cm_core->ht_lock, flags); list_for_each_safe(list_pos, list_temp, &cm_core->non_accelerated_list) { cm_node = container_of(list_pos, struct i40iw_cm_node, list); if ((cm_node->listener == listener) && !cm_node->accelerated) { atomic_inc(&cm_node->ref_count); list_add(&cm_node->reset_entry, &reset_list); } } spin_unlock_irqrestore(&cm_core->ht_lock, flags); } list_for_each_safe(list_pos, list_temp, &reset_list) { cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); loopback = cm_node->loopbackpartner; if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { i40iw_rem_ref_cm_node(cm_node); } else { if (!loopback) { i40iw_cleanup_retrans_entry(cm_node); err = i40iw_send_reset(cm_node); if (err) { cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_pr_err("send reset\n"); } else { old_state = cm_node->state; cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) i40iw_rem_ref_cm_node(cm_node); } } else { struct i40iw_cm_event event; event.cm_node = loopback; memcpy(event.cm_info.rem_addr, loopback->rem_addr, sizeof(event.cm_info.rem_addr)); memcpy(event.cm_info.loc_addr, loopback->loc_addr, sizeof(event.cm_info.loc_addr)); event.cm_info.rem_port = loopback->rem_port; event.cm_info.loc_port = loopback->loc_port; event.cm_info.cm_id = loopback->cm_id; event.cm_info.ipv4 = loopback->ipv4; atomic_inc(&loopback->ref_count); loopback->state = I40IW_CM_STATE_CLOSED; i40iw_event_connect_error(&event); cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; i40iw_rem_ref_cm_node(cm_node); } } } if (!atomic_dec_return(&listener->ref_count)) { spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_del(&listener->list); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); if (listener->iwdev) { if (apbvt_del) i40iw_manage_apbvt(listener->iwdev, listener->loc_port, I40IW_MANAGE_APBVT_DEL); memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); nfo.loc_port = listener->loc_port; nfo.ipv4 = listener->ipv4; nfo.vlan_id = listener->vlan_id; nfo.user_pri = listener->user_pri; if (!list_empty(&listener->child_listen_list)) { i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); } else { if (listener->qhash_set) i40iw_manage_qhash(listener->iwdev, &nfo, I40IW_QHASH_TYPE_TCP_SYN, I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); } } cm_core->stats_listen_destroyed++; kfree(listener); cm_core->stats_listen_nodes_destroyed++; listener = NULL; ret = 0; } if (listener) { if (atomic_read(&listener->pend_accepts_cnt) > 0) i40iw_debug(cm_core->dev, I40IW_DEBUG_CM, "%s: listener (%p) pending accepts=%u\n", __func__, listener, atomic_read(&listener->pend_accepts_cnt)); } return ret; } /** * i40iw_cm_del_listen - delete a linstener * @cm_core: cm's core * @listener: passive connection's listener * @apbvt_del: flag to delete apbvt */ static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, struct i40iw_cm_listener *listener, bool apbvt_del) { listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; listener->cm_id = NULL; /* going to be destroyed pretty soon */ return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); } /** * i40iw_addr_resolve_neigh - resolve neighbor address * @iwdev: iwarp device structure * @src_ip: local ip address * @dst_ip: remote ip address * @arpindex: if there is an arp entry */ static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, u32 src_ip, u32 dst_ip, int arpindex) { struct rtable *rt; struct neighbour *neigh; int rc = arpindex; struct net_device *netdev = iwdev->netdev; __be32 dst_ipaddr = htonl(dst_ip); __be32 src_ipaddr = htonl(src_ip); rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); if (IS_ERR(rt)) { i40iw_pr_err("ip_route_output\n"); return rc; } if (netif_is_bond_slave(netdev)) netdev = netdev_master_upper_dev_get(netdev); neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); rcu_read_lock(); if (neigh) { if (neigh->nud_state & NUD_VALID) { if (arpindex >= 0) { if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, neigh->ha)) /* Mac address same as arp table */ goto resolve_neigh_exit; i40iw_manage_arp_cache(iwdev, iwdev->arp_table[arpindex].mac_addr, &dst_ip, true, I40IW_ARP_DELETE); } i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); } else { neigh_event_send(neigh, NULL); } } resolve_neigh_exit: rcu_read_unlock(); if (neigh) neigh_release(neigh); ip_rt_put(rt); return rc; } /** * i40iw_get_dst_ipv6 */ static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, struct sockaddr_in6 *dst_addr) { struct dst_entry *dst; struct flowi6 fl6; memset(&fl6, 0, sizeof(fl6)); fl6.daddr = dst_addr->sin6_addr; fl6.saddr = src_addr->sin6_addr; if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) fl6.flowi6_oif = dst_addr->sin6_scope_id; dst = ip6_route_output(&init_net, NULL, &fl6); return dst; } /** * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address * @iwdev: iwarp device structure * @dst_ip: remote ip address * @arpindex: if there is an arp entry */ static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, u32 *src, u32 *dest, int arpindex) { struct neighbour *neigh; int rc = arpindex; struct net_device *netdev = iwdev->netdev; struct dst_entry *dst; struct sockaddr_in6 dst_addr; struct sockaddr_in6 src_addr; memset(&dst_addr, 0, sizeof(dst_addr)); dst_addr.sin6_family = AF_INET6; i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); memset(&src_addr, 0, sizeof(src_addr)); src_addr.sin6_family = AF_INET6; i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); if (!dst || dst->error) { if (dst) { dst_release(dst); i40iw_pr_err("ip6_route_output returned dst->error = %d\n", dst->error); } return rc; } if (netif_is_bond_slave(netdev)) netdev = netdev_master_upper_dev_get(netdev); neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); rcu_read_lock(); if (neigh) { i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); if (neigh->nud_state & NUD_VALID) { if (arpindex >= 0) { if (ether_addr_equal (iwdev->arp_table[arpindex].mac_addr, neigh->ha)) { /* Mac address same as in arp table */ goto resolve_neigh_exit6; } i40iw_manage_arp_cache(iwdev, iwdev->arp_table[arpindex].mac_addr, dest, false, I40IW_ARP_DELETE); } i40iw_manage_arp_cache(iwdev, neigh->ha, dest, false, I40IW_ARP_ADD); rc = i40iw_arp_table(iwdev, dest, false, NULL, I40IW_ARP_RESOLVE); } else { neigh_event_send(neigh, NULL); } } resolve_neigh_exit6: rcu_read_unlock(); if (neigh) neigh_release(neigh); dst_release(dst); return rc; } /** * i40iw_ipv4_is_loopback - check if loopback * @loc_addr: local addr to compare * @rem_addr: remote address */ static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) { return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); } /** * i40iw_ipv6_is_loopback - check if loopback * @loc_addr: local addr to compare * @rem_addr: remote address */ static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) { struct in6_addr raddr6; i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); } /** * i40iw_make_cm_node - create a new instance of a cm node * @cm_core: cm's core * @iwdev: iwarp device structure * @cm_info: quad info for connection * @listener: passive connection's listener */ static struct i40iw_cm_node *i40iw_make_cm_node( struct i40iw_cm_core *cm_core, struct i40iw_device *iwdev, struct i40iw_cm_info *cm_info, struct i40iw_cm_listener *listener) { struct i40iw_cm_node *cm_node; int oldarpindex; int arpindex; struct net_device *netdev = iwdev->netdev; /* create an hte and cm_node for this instance */ cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); if (!cm_node) return NULL; /* set our node specific transport info */ cm_node->ipv4 = cm_info->ipv4; cm_node->vlan_id = cm_info->vlan_id; if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb) cm_node->vlan_id = 0; cm_node->tos = cm_info->tos; cm_node->user_pri = cm_info->user_pri; if (listener) { if (listener->tos != cm_info->tos) i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "application TOS[%d] and remote client TOS[%d] mismatch\n", listener->tos, cm_info->tos); cm_node->tos = max(listener->tos, cm_info->tos); cm_node->user_pri = rt_tos2priority(cm_node->tos); i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, cm_node->user_pri); } memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); cm_node->loc_port = cm_info->loc_port; cm_node->rem_port = cm_info->rem_port; cm_node->mpa_frame_rev = iwdev->mpa_version; cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; cm_node->ird_size = I40IW_MAX_IRD_SIZE; cm_node->ord_size = I40IW_MAX_ORD_SIZE; cm_node->listener = listener; cm_node->cm_id = cm_info->cm_id; ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); spin_lock_init(&cm_node->retrans_list_lock); cm_node->ack_rcvd = false; atomic_set(&cm_node->ref_count, 1); /* associate our parent CM core */ cm_node->cm_core = cm_core; cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; cm_node->tcp_cntxt.rcv_wnd = I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; if (cm_node->ipv4) { cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), htonl(cm_node->rem_addr[0]), htons(cm_node->loc_port), htons(cm_node->rem_port)); cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4; } else if (IS_ENABLED(CONFIG_IPV6)) { __be32 loc[4] = { htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) }; __be32 rem[4] = { htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) }; cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, htons(cm_node->loc_port), htons(cm_node->rem_port)); cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6; } cm_node->iwdev = iwdev; cm_node->dev = &iwdev->sc_dev; if ((cm_node->ipv4 && i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { arpindex = i40iw_arp_table(iwdev, cm_node->rem_addr, false, NULL, I40IW_ARP_RESOLVE); } else { oldarpindex = i40iw_arp_table(iwdev, cm_node->rem_addr, false, NULL, I40IW_ARP_RESOLVE); if (cm_node->ipv4) arpindex = i40iw_addr_resolve_neigh(iwdev, cm_info->loc_addr[0], cm_info->rem_addr[0], oldarpindex); else if (IS_ENABLED(CONFIG_IPV6)) arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, cm_info->loc_addr, cm_info->rem_addr, oldarpindex); else arpindex = -EINVAL; } if (arpindex < 0) { i40iw_pr_err("cm_node arpindex\n"); kfree(cm_node); return NULL; } ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); i40iw_add_hte_node(cm_core, cm_node); cm_core->stats_nodes_created++; return cm_node; } /** * i40iw_rem_ref_cm_node - destroy an instance of a cm node * @cm_node: connection's node */ static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) { struct i40iw_cm_core *cm_core = cm_node->cm_core; struct i40iw_qp *iwqp; struct i40iw_cm_info nfo; unsigned long flags; spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); if (atomic_dec_return(&cm_node->ref_count)) { spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); return; } list_del(&cm_node->list); spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); /* if the node is destroyed before connection was accelerated */ if (!cm_node->accelerated && cm_node->accept_pend) { pr_err("node destroyed before established\n"); atomic_dec(&cm_node->listener->pend_accepts_cnt); } if (cm_node->close_entry) i40iw_handle_close_entry(cm_node, 0); if (cm_node->listener) { i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); } else { if (cm_node->apbvt_set) { i40iw_manage_apbvt(cm_node->iwdev, cm_node->loc_port, I40IW_MANAGE_APBVT_DEL); cm_node->apbvt_set = 0; } i40iw_get_addr_info(cm_node, &nfo); if (cm_node->qhash_set) { i40iw_manage_qhash(cm_node->iwdev, &nfo, I40IW_QHASH_TYPE_TCP_ESTABLISHED, I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); cm_node->qhash_set = 0; } } iwqp = cm_node->iwqp; if (iwqp) { iwqp->cm_node = NULL; i40iw_rem_ref(&iwqp->ibqp); cm_node->iwqp = NULL; } else if (cm_node->qhash_set) { i40iw_get_addr_info(cm_node, &nfo); i40iw_manage_qhash(cm_node->iwdev, &nfo, I40IW_QHASH_TYPE_TCP_ESTABLISHED, I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); cm_node->qhash_set = 0; } cm_node->cm_core->stats_nodes_destroyed++; kfree(cm_node); } /** * i40iw_handle_fin_pkt - FIN packet received * @cm_node: connection's node */ static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) { u32 ret; switch (cm_node->state) { case I40IW_CM_STATE_SYN_RCVD: case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_MPAREJ_RCVD: cm_node->tcp_cntxt.rcv_nxt++; i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_LAST_ACK; i40iw_send_fin(cm_node); break; case I40IW_CM_STATE_MPAREQ_SENT: i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); cm_node->tcp_cntxt.rcv_nxt++; i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_FIN_WAIT1: cm_node->tcp_cntxt.rcv_nxt++; i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSING; i40iw_send_ack(cm_node); /* * Wait for ACK as this is simultaneous close. * After we receive ACK, do not send anything. * Just rm the node. */ break; case I40IW_CM_STATE_FIN_WAIT2: cm_node->tcp_cntxt.rcv_nxt++; i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_TIME_WAIT; i40iw_send_ack(cm_node); ret = i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); if (ret) i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); break; case I40IW_CM_STATE_TIME_WAIT: cm_node->tcp_cntxt.rcv_nxt++; i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_rem_ref_cm_node(cm_node); break; case I40IW_CM_STATE_OFFLOADED: default: i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); break; } } /** * i40iw_handle_rst_pkt - process received RST packet * @cm_node: connection's node * @rbuf: receive buffer */ static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { i40iw_cleanup_retrans_entry(cm_node); switch (cm_node->state) { case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_MPAREQ_SENT: switch (cm_node->mpa_frame_rev) { case IETF_MPA_V2: cm_node->mpa_frame_rev = IETF_MPA_V1; /* send a syn and goto syn sent state */ cm_node->state = I40IW_CM_STATE_SYN_SENT; if (i40iw_send_syn(cm_node, 0)) i40iw_active_open_err(cm_node, false); break; case IETF_MPA_V1: default: i40iw_active_open_err(cm_node, false); break; } break; case I40IW_CM_STATE_MPAREQ_RCVD: atomic_add_return(1, &cm_node->passive_state); break; case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_SYN_RCVD: case I40IW_CM_STATE_LISTENING: i40iw_pr_err("Bad state state = %d\n", cm_node->state); i40iw_passive_open_err(cm_node, false); break; case I40IW_CM_STATE_OFFLOADED: i40iw_active_open_err(cm_node, false); break; case I40IW_CM_STATE_CLOSED: break; case I40IW_CM_STATE_FIN_WAIT2: case I40IW_CM_STATE_FIN_WAIT1: case I40IW_CM_STATE_LAST_ACK: cm_node->cm_id->rem_ref(cm_node->cm_id); /* fall through */ case I40IW_CM_STATE_TIME_WAIT: cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_rem_ref_cm_node(cm_node); break; default: break; } } /** * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer * @cm_node: connection's node * @rbuf: receive buffer */ static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { int ret; int datasize = rbuf->datalen; u8 *dataloc = rbuf->data; enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; u32 res_type; ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); if (ret) { if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) i40iw_active_open_err(cm_node, true); else i40iw_passive_open_err(cm_node, true); return; } switch (cm_node->state) { case I40IW_CM_STATE_ESTABLISHED: if (res_type == I40IW_MPA_REQUEST_REJECT) i40iw_pr_err("state for reject\n"); cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; type = I40IW_CM_EVENT_MPA_REQ; i40iw_send_ack(cm_node); /* ACK received MPA request */ atomic_set(&cm_node->passive_state, I40IW_PASSIVE_STATE_INDICATED); break; case I40IW_CM_STATE_MPAREQ_SENT: i40iw_cleanup_retrans_entry(cm_node); if (res_type == I40IW_MPA_REQUEST_REJECT) { type = I40IW_CM_EVENT_MPA_REJECT; cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; } else { type = I40IW_CM_EVENT_CONNECTED; cm_node->state = I40IW_CM_STATE_OFFLOADED; } i40iw_send_ack(cm_node); break; default: pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); break; } i40iw_create_event(cm_node, type); } /** * i40iw_indicate_pkt_err - Send up err event to cm * @cm_node: connection's node */ static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) { switch (cm_node->state) { case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_MPAREQ_SENT: i40iw_active_open_err(cm_node, true); break; case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_SYN_RCVD: i40iw_passive_open_err(cm_node, true); break; case I40IW_CM_STATE_OFFLOADED: default: break; } } /** * i40iw_check_syn - Check for error on received syn ack * @cm_node: connection's node * @tcph: pointer tcp header */ static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) { int err = 0; if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { err = 1; i40iw_active_open_err(cm_node, true); } return err; } /** * i40iw_check_seq - check seq numbers if OK * @cm_node: connection's node * @tcph: pointer tcp header */ static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) { int err = 0; u32 seq; u32 ack_seq; u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; u32 rcv_wnd; seq = ntohl(tcph->seq); ack_seq = ntohl(tcph->ack_seq); rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; if (ack_seq != loc_seq_num) err = -1; else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) err = -1; if (err) { i40iw_pr_err("seq number\n"); i40iw_indicate_pkt_err(cm_node); } return err; } /** * i40iw_handle_syn_pkt - is for Passive node * @cm_node: connection's node * @rbuf: receive buffer */ static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; int ret; u32 inc_sequence; int optionsize; struct i40iw_cm_info nfo; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_MPAREQ_SENT: /* Rcvd syn on active open connection */ i40iw_active_open_err(cm_node, 1); break; case I40IW_CM_STATE_LISTENING: /* Passive OPEN */ if (atomic_read(&cm_node->listener->pend_accepts_cnt) > cm_node->listener->backlog) { cm_node->cm_core->stats_backlog_drops++; i40iw_passive_open_err(cm_node, false); break; } ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); if (ret) { i40iw_passive_open_err(cm_node, false); /* drop pkt */ break; } cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; cm_node->accept_pend = 1; atomic_inc(&cm_node->listener->pend_accepts_cnt); cm_node->state = I40IW_CM_STATE_SYN_RCVD; i40iw_get_addr_info(cm_node, &nfo); ret = i40iw_manage_qhash(cm_node->iwdev, &nfo, I40IW_QHASH_TYPE_TCP_ESTABLISHED, I40IW_QHASH_MANAGE_TYPE_ADD, (void *)cm_node, false); cm_node->qhash_set = true; break; case I40IW_CM_STATE_CLOSED: i40iw_cleanup_retrans_entry(cm_node); atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_OFFLOADED: case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_FIN_WAIT1: case I40IW_CM_STATE_FIN_WAIT2: case I40IW_CM_STATE_MPAREQ_RCVD: case I40IW_CM_STATE_LAST_ACK: case I40IW_CM_STATE_CLOSING: case I40IW_CM_STATE_UNKNOWN: default: break; } } /** * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) * @cm_node: connection's node * @rbuf: receive buffer */ static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; int ret; u32 inc_sequence; int optionsize; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case I40IW_CM_STATE_SYN_SENT: i40iw_cleanup_retrans_entry(cm_node); /* active open */ if (i40iw_check_syn(cm_node, tcph)) { i40iw_pr_err("check syn fail\n"); return; } cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); /* setup options */ ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); if (ret) { i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "cm_node=%p tcp_options failed\n", cm_node); break; } i40iw_cleanup_retrans_entry(cm_node); cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; i40iw_send_ack(cm_node); /* ACK for the syn_ack */ ret = i40iw_send_mpa_request(cm_node); if (ret) { i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "cm_node=%p i40iw_send_mpa_request failed\n", cm_node); break; } cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; break; case I40IW_CM_STATE_MPAREQ_RCVD: i40iw_passive_open_err(cm_node, true); break; case I40IW_CM_STATE_LISTENING: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_CLOSED: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); i40iw_cleanup_retrans_entry(cm_node); atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_FIN_WAIT1: case I40IW_CM_STATE_FIN_WAIT2: case I40IW_CM_STATE_LAST_ACK: case I40IW_CM_STATE_OFFLOADED: case I40IW_CM_STATE_CLOSING: case I40IW_CM_STATE_UNKNOWN: case I40IW_CM_STATE_MPAREQ_SENT: default: break; } } /** * i40iw_handle_ack_pkt - process packet with ACK * @cm_node: connection's node * @rbuf: receive buffer */ static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; u32 inc_sequence; int ret = 0; int optionsize; u32 datasize = rbuf->datalen; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); if (i40iw_check_seq(cm_node, tcph)) return -EINVAL; inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case I40IW_CM_STATE_SYN_RCVD: i40iw_cleanup_retrans_entry(cm_node); ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); if (ret) break; cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); cm_node->state = I40IW_CM_STATE_ESTABLISHED; if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; i40iw_handle_rcv_mpa(cm_node, rbuf); } break; case I40IW_CM_STATE_ESTABLISHED: i40iw_cleanup_retrans_entry(cm_node); if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; i40iw_handle_rcv_mpa(cm_node, rbuf); } break; case I40IW_CM_STATE_MPAREQ_SENT: cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; cm_node->ack_rcvd = false; i40iw_handle_rcv_mpa(cm_node, rbuf); } else { cm_node->ack_rcvd = true; } break; case I40IW_CM_STATE_LISTENING: i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_CLOSED: i40iw_cleanup_retrans_entry(cm_node); atomic_inc(&cm_node->ref_count); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_LAST_ACK: case I40IW_CM_STATE_CLOSING: i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_CLOSED; if (!cm_node->accept_pend) cm_node->cm_id->rem_ref(cm_node->cm_id); i40iw_rem_ref_cm_node(cm_node); break; case I40IW_CM_STATE_FIN_WAIT1: i40iw_cleanup_retrans_entry(cm_node); cm_node->state = I40IW_CM_STATE_FIN_WAIT2; break; case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_FIN_WAIT2: case I40IW_CM_STATE_OFFLOADED: case I40IW_CM_STATE_MPAREQ_RCVD: case I40IW_CM_STATE_UNKNOWN: default: i40iw_cleanup_retrans_entry(cm_node); break; } return ret; } /** * i40iw_process_packet - process cm packet * @cm_node: connection's node * @rbuf: receive buffer */ static void i40iw_process_packet(struct i40iw_cm_node *cm_node, struct i40iw_puda_buf *rbuf) { enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; u32 fin_set = 0; int ret; if (tcph->rst) { pkt_type = I40IW_PKT_TYPE_RST; } else if (tcph->syn) { pkt_type = I40IW_PKT_TYPE_SYN; if (tcph->ack) pkt_type = I40IW_PKT_TYPE_SYNACK; } else if (tcph->ack) { pkt_type = I40IW_PKT_TYPE_ACK; } if (tcph->fin) fin_set = 1; switch (pkt_type) { case I40IW_PKT_TYPE_SYN: i40iw_handle_syn_pkt(cm_node, rbuf); break; case I40IW_PKT_TYPE_SYNACK: i40iw_handle_synack_pkt(cm_node, rbuf); break; case I40IW_PKT_TYPE_ACK: ret = i40iw_handle_ack_pkt(cm_node, rbuf); if (fin_set && !ret) i40iw_handle_fin_pkt(cm_node); break; case I40IW_PKT_TYPE_RST: i40iw_handle_rst_pkt(cm_node, rbuf); break; default: if (fin_set && (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) i40iw_handle_fin_pkt(cm_node); break; } } /** * i40iw_make_listen_node - create a listen node with params * @cm_core: cm's core * @iwdev: iwarp device structure * @cm_info: quad info for connection */ static struct i40iw_cm_listener *i40iw_make_listen_node( struct i40iw_cm_core *cm_core, struct i40iw_device *iwdev, struct i40iw_cm_info *cm_info) { struct i40iw_cm_listener *listener; unsigned long flags; /* cannot have multiple matching listeners */ listener = i40iw_find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port, cm_info->vlan_id, I40IW_CM_LISTENER_EITHER_STATE); if (listener && (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { atomic_dec(&listener->ref_count); i40iw_debug(cm_core->dev, I40IW_DEBUG_CM, "Not creating listener since it already exists\n"); return NULL; } if (!listener) { /* create a CM listen node (1/2 node to compare incoming traffic to) */ listener = kzalloc(sizeof(*listener), GFP_KERNEL); if (!listener) return NULL; cm_core->stats_listen_nodes_created++; memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); listener->loc_port = cm_info->loc_port; INIT_LIST_HEAD(&listener->child_listen_list); atomic_set(&listener->ref_count, 1); } else { listener->reused_node = 1; } listener->cm_id = cm_info->cm_id; listener->ipv4 = cm_info->ipv4; listener->vlan_id = cm_info->vlan_id; atomic_set(&listener->pend_accepts_cnt, 0); listener->cm_core = cm_core; listener->iwdev = iwdev; listener->backlog = cm_info->backlog; listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; if (!listener->reused_node) { spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_add(&listener->list, &cm_core->listen_nodes); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); } return listener; } /** * i40iw_create_cm_node - make a connection node with params * @cm_core: cm's core * @iwdev: iwarp device structure * @conn_param: upper layer connection parameters * @cm_info: quad info for connection */ static struct i40iw_cm_node *i40iw_create_cm_node( struct i40iw_cm_core *cm_core, struct i40iw_device *iwdev, struct iw_cm_conn_param *conn_param, struct i40iw_cm_info *cm_info) { struct i40iw_cm_node *cm_node; struct i40iw_cm_listener *loopback_remotelistener; struct i40iw_cm_node *loopback_remotenode; struct i40iw_cm_info loopback_cm_info; u16 private_data_len = conn_param->private_data_len; const void *private_data = conn_param->private_data; /* create a CM connection node */ cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); if (!cm_node) return ERR_PTR(-ENOMEM); /* set our node side to client (active) side */ cm_node->tcp_cntxt.client = 1; cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { loopback_remotelistener = i40iw_find_listener( cm_core, cm_info->rem_addr, cm_node->rem_port, cm_node->vlan_id, I40IW_CM_LISTENER_ACTIVE_STATE); if (!loopback_remotelistener) { i40iw_rem_ref_cm_node(cm_node); return ERR_PTR(-ECONNREFUSED); } else { loopback_cm_info = *cm_info; loopback_cm_info.loc_port = cm_info->rem_port; loopback_cm_info.rem_port = cm_info->loc_port; loopback_cm_info.cm_id = loopback_remotelistener->cm_id; loopback_cm_info.ipv4 = cm_info->ipv4; loopback_remotenode = i40iw_make_cm_node(cm_core, iwdev, &loopback_cm_info, loopback_remotelistener); if (!loopback_remotenode) { i40iw_rem_ref_cm_node(cm_node); return ERR_PTR(-ENOMEM); } cm_core->stats_loopbacks++; loopback_remotenode->loopbackpartner = cm_node; loopback_remotenode->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; cm_node->loopbackpartner = loopback_remotenode; memcpy(loopback_remotenode->pdata_buf, private_data, private_data_len); loopback_remotenode->pdata.size = private_data_len; if (loopback_remotenode->ord_size > cm_node->ird_size) loopback_remotenode->ord_size = cm_node->ird_size; cm_node->state = I40IW_CM_STATE_OFFLOADED; cm_node->tcp_cntxt.rcv_nxt = loopback_remotenode->tcp_cntxt.loc_seq_num; loopback_remotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num; cm_node->tcp_cntxt.max_snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; } return cm_node; } cm_node->pdata.size = private_data_len; cm_node->pdata.addr = cm_node->pdata_buf; memcpy(cm_node->pdata_buf, private_data, private_data_len); cm_node->state = I40IW_CM_STATE_SYN_SENT; return cm_node; } /** * i40iw_cm_reject - reject and teardown a connection * @cm_node: connection's node * @pdate: ptr to private data for reject * @plen: size of private data */ static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) { int ret = 0; int err; int passive_state; struct iw_cm_id *cm_id = cm_node->cm_id; struct i40iw_cm_node *loopback = cm_node->loopbackpartner; if (cm_node->tcp_cntxt.client) return ret; i40iw_cleanup_retrans_entry(cm_node); if (!loopback) { passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == I40IW_SEND_RESET_EVENT) { cm_node->state = I40IW_CM_STATE_CLOSED; i40iw_rem_ref_cm_node(cm_node); } else { if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { i40iw_rem_ref_cm_node(cm_node); } else { ret = i40iw_send_mpa_reject(cm_node, pdata, plen); if (ret) { cm_node->state = I40IW_CM_STATE_CLOSED; err = i40iw_send_reset(cm_node); if (err) i40iw_pr_err("send reset failed\n"); } else { cm_id->add_ref(cm_id); } } } } else { cm_node->cm_id = NULL; if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { i40iw_rem_ref_cm_node(cm_node); i40iw_rem_ref_cm_node(loopback); } else { ret = i40iw_send_cm_event(loopback, loopback->cm_id, IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); i40iw_rem_ref_cm_node(cm_node); loopback->state = I40IW_CM_STATE_CLOSING; cm_id = loopback->cm_id; i40iw_rem_ref_cm_node(loopback); cm_id->rem_ref(cm_id); } } return ret; } /** * i40iw_cm_close - close of cm connection * @cm_node: connection's node */ static int i40iw_cm_close(struct i40iw_cm_node *cm_node) { int ret = 0; if (!cm_node) return -EINVAL; switch (cm_node->state) { case I40IW_CM_STATE_SYN_RCVD: case I40IW_CM_STATE_SYN_SENT: case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: case I40IW_CM_STATE_ESTABLISHED: case I40IW_CM_STATE_ACCEPTING: case I40IW_CM_STATE_MPAREQ_SENT: case I40IW_CM_STATE_MPAREQ_RCVD: i40iw_cleanup_retrans_entry(cm_node); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_CLOSE_WAIT: cm_node->state = I40IW_CM_STATE_LAST_ACK; i40iw_send_fin(cm_node); break; case I40IW_CM_STATE_FIN_WAIT1: case I40IW_CM_STATE_FIN_WAIT2: case I40IW_CM_STATE_LAST_ACK: case I40IW_CM_STATE_TIME_WAIT: case I40IW_CM_STATE_CLOSING: ret = -1; break; case I40IW_CM_STATE_LISTENING: i40iw_cleanup_retrans_entry(cm_node); i40iw_send_reset(cm_node); break; case I40IW_CM_STATE_MPAREJ_RCVD: case I40IW_CM_STATE_UNKNOWN: case I40IW_CM_STATE_INITED: case I40IW_CM_STATE_CLOSED: case I40IW_CM_STATE_LISTENER_DESTROYED: i40iw_rem_ref_cm_node(cm_node); break; case I40IW_CM_STATE_OFFLOADED: if (cm_node->send_entry) i40iw_pr_err("send_entry\n"); i40iw_rem_ref_cm_node(cm_node); break; } return ret; } /** * i40iw_receive_ilq - recv an ETHERNET packet, and process it * through CM * @vsi: pointer to the vsi structure * @rbuf: receive buffer */ void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf) { struct i40iw_cm_node *cm_node; struct i40iw_cm_listener *listener; struct iphdr *iph; struct ipv6hdr *ip6h; struct tcphdr *tcph; struct i40iw_cm_info cm_info; struct i40iw_sc_dev *dev = vsi->dev; struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; struct i40iw_cm_core *cm_core = &iwdev->cm_core; struct vlan_ethhdr *ethh; u16 vtag; /* if vlan, then maclen = 18 else 14 */ iph = (struct iphdr *)rbuf->iph; memset(&cm_info, 0, sizeof(cm_info)); i40iw_debug_buf(dev, I40IW_DEBUG_ILQ, "RECEIVE ILQ BUFFER", rbuf->mem.va, rbuf->totallen); ethh = (struct vlan_ethhdr *)rbuf->mem.va; if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { vtag = ntohs(ethh->h_vlan_TCI); cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; cm_info.vlan_id = vtag & VLAN_VID_MASK; i40iw_debug(cm_core->dev, I40IW_DEBUG_CM, "%s vlan_id=%d\n", __func__, cm_info.vlan_id); } else { cm_info.vlan_id = I40IW_NO_VLAN; } tcph = (struct tcphdr *)rbuf->tcph; if (rbuf->ipv4) { cm_info.loc_addr[0] = ntohl(iph->daddr); cm_info.rem_addr[0] = ntohl(iph->saddr); cm_info.ipv4 = true; cm_info.tos = iph->tos; } else { ip6h = (struct ipv6hdr *)rbuf->iph; i40iw_copy_ip_ntohl(cm_info.loc_addr, ip6h->daddr.in6_u.u6_addr32); i40iw_copy_ip_ntohl(cm_info.rem_addr, ip6h->saddr.in6_u.u6_addr32); cm_info.ipv4 = false; cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); } cm_info.loc_port = ntohs(tcph->dest); cm_info.rem_port = ntohs(tcph->source); cm_node = i40iw_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, cm_info.loc_port, cm_info.loc_addr, true, false); if (!cm_node) { /* Only type of packet accepted are for */ /* the PASSIVE open (syn only) */ if (!tcph->syn || tcph->ack) return; listener = i40iw_find_listener(cm_core, cm_info.loc_addr, cm_info.loc_port, cm_info.vlan_id, I40IW_CM_LISTENER_ACTIVE_STATE); if (!listener) { cm_info.cm_id = NULL; i40iw_debug(cm_core->dev, I40IW_DEBUG_CM, "%s no listener found\n", __func__); return; } cm_info.cm_id = listener->cm_id; cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); if (!cm_node) { i40iw_debug(cm_core->dev, I40IW_DEBUG_CM, "%s allocate node failed\n", __func__); atomic_dec(&listener->ref_count); return; } if (!tcph->rst && !tcph->fin) { cm_node->state = I40IW_CM_STATE_LISTENING; } else { i40iw_rem_ref_cm_node(cm_node); return; } atomic_inc(&cm_node->ref_count); } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { i40iw_rem_ref_cm_node(cm_node); return; } i40iw_process_packet(cm_node, rbuf); i40iw_rem_ref_cm_node(cm_node); } /** * i40iw_setup_cm_core - allocate a top level instance of a cm * core * @iwdev: iwarp device structure */ int i40iw_setup_cm_core(struct i40iw_device *iwdev) { struct i40iw_cm_core *cm_core = &iwdev->cm_core; cm_core->iwdev = iwdev; cm_core->dev = &iwdev->sc_dev; INIT_LIST_HEAD(&cm_core->accelerated_list); INIT_LIST_HEAD(&cm_core->non_accelerated_list); INIT_LIST_HEAD(&cm_core->listen_nodes); timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0); spin_lock_init(&cm_core->ht_lock); spin_lock_init(&cm_core->listen_list_lock); spin_lock_init(&cm_core->apbvt_lock); cm_core->event_wq = alloc_ordered_workqueue("iwewq", WQ_MEM_RECLAIM); if (!cm_core->event_wq) goto error; cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq", WQ_MEM_RECLAIM); if (!cm_core->disconn_wq) goto error; return 0; error: i40iw_cleanup_cm_core(&iwdev->cm_core); return -ENOMEM; } /** * i40iw_cleanup_cm_core - deallocate a top level instance of a * cm core * @cm_core: cm's core */ void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) { unsigned long flags; if (!cm_core) return; spin_lock_irqsave(&cm_core->ht_lock, flags); if (timer_pending(&cm_core->tcp_timer)) del_timer_sync(&cm_core->tcp_timer); spin_unlock_irqrestore(&cm_core->ht_lock, flags); if (cm_core->event_wq) destroy_workqueue(cm_core->event_wq); if (cm_core->disconn_wq) destroy_workqueue(cm_core->disconn_wq); } /** * i40iw_init_tcp_ctx - setup qp context * @cm_node: connection's node * @tcp_info: offload info for tcp * @iwqp: associate qp for the connection */ static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, struct i40iw_tcp_offload_info *tcp_info, struct i40iw_qp *iwqp) { tcp_info->ipv4 = cm_node->ipv4; tcp_info->drop_ooo_seg = true; tcp_info->wscale = true; tcp_info->ignore_tcp_opt = true; tcp_info->ignore_tcp_uns_opt = true; tcp_info->no_nagle = false; tcp_info->ttl = I40IW_DEFAULT_TTL; tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << cm_node->tcp_cntxt.rcv_wscale); tcp_info->flow_label = 0; tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); if (cm_node->vlan_id <= VLAN_VID_MASK) { tcp_info->insert_vlan_tag = true; tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) | cm_node->vlan_id); } if (cm_node->ipv4) { tcp_info->src_port = cpu_to_le16(cm_node->loc_port); tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]); tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]); tcp_info->arp_idx = cpu_to_le16((u16)i40iw_arp_table( iwqp->iwdev, &tcp_info->dest_ip_addr3, true, NULL, I40IW_ARP_RESOLVE)); } else { tcp_info->src_port = cpu_to_le16(cm_node->loc_port); tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]); tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]); tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]); tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]); tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]); tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]); tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]); tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]); tcp_info->arp_idx = cpu_to_le16((u16)i40iw_arp_table( iwqp->iwdev, &tcp_info->dest_ip_addr0, false, NULL, I40IW_ARP_RESOLVE)); } } /** * i40iw_cm_init_tsa_conn - setup qp for RTS * @iwqp: associate qp for the connection * @cm_node: connection's node */ static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, struct i40iw_cm_node *cm_node) { struct i40iw_tcp_offload_info tcp_info; struct i40iwarp_offload_info *iwarp_info; struct i40iw_qp_host_ctx_info *ctx_info; struct i40iw_device *iwdev = iwqp->iwdev; struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); iwarp_info = &iwqp->iwarp_info; ctx_info = &iwqp->ctx_info; ctx_info->tcp_info = &tcp_info; ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; iwarp_info->ord_size = cm_node->ord_size; iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); if (iwarp_info->ord_size == 1) iwarp_info->ord_size = 2; iwarp_info->rd_enable = true; iwarp_info->rdmap_ver = 1; iwarp_info->ddp_ver = 1; iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; ctx_info->tcp_info_valid = true; ctx_info->iwarp_info_valid = true; ctx_info->add_to_qoslist = true; ctx_info->user_pri = cm_node->user_pri; i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); if (cm_node->snd_mark_en) { iwarp_info->snd_mark_en = true; iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + cm_node->lsmm_size; } cm_node->state = I40IW_CM_STATE_OFFLOADED; tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; tcp_info.tos = cm_node->tos; dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); /* once tcp_info is set, no need to do it again */ ctx_info->tcp_info_valid = false; ctx_info->iwarp_info_valid = false; ctx_info->add_to_qoslist = false; } /** * i40iw_cm_disconn - when a connection is being closed * @iwqp: associate qp for the connection */ void i40iw_cm_disconn(struct i40iw_qp *iwqp) { struct disconn_work *work; struct i40iw_device *iwdev = iwqp->iwdev; struct i40iw_cm_core *cm_core = &iwdev->cm_core; unsigned long flags; work = kzalloc(sizeof(*work), GFP_ATOMIC); if (!work) return; /* Timer will clean up */ spin_lock_irqsave(&iwdev->qptable_lock, flags); if (!iwdev->qp_table[iwqp->ibqp.qp_num]) { spin_unlock_irqrestore(&iwdev->qptable_lock, flags); i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s qp_id %d is already freed\n", __func__, iwqp->ibqp.qp_num); kfree(work); return; } i40iw_add_ref(&iwqp->ibqp); spin_unlock_irqrestore(&iwdev->qptable_lock, flags); work->iwqp = iwqp; INIT_WORK(&work->work, i40iw_disconnect_worker); queue_work(cm_core->disconn_wq, &work->work); return; } /** * i40iw_qp_disconnect - free qp and close cm * @iwqp: associate qp for the connection */ static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) { struct i40iw_device *iwdev; struct i40iw_ib_device *iwibdev; iwdev = to_iwdev(iwqp->ibqp.device); if (!iwdev) { i40iw_pr_err("iwdev == NULL\n"); return; } iwibdev = iwdev->iwibdev; if (iwqp->active_conn) { /* indicate this connection is NOT active */ iwqp->active_conn = 0; } else { /* Need to free the Last Streaming Mode Message */ if (iwqp->ietf_mem.va) { if (iwqp->lsmm_mr) iwibdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); } } /* close the CM node down if it is still active */ if (iwqp->cm_node) { i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); i40iw_cm_close(iwqp->cm_node); } } /** * i40iw_cm_disconn_true - called by worker thread to disconnect qp * @iwqp: associate qp for the connection */ static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) { struct iw_cm_id *cm_id; struct i40iw_device *iwdev; struct i40iw_sc_qp *qp = &iwqp->sc_qp; u16 last_ae; u8 original_hw_tcp_state; u8 original_ibqp_state; int disconn_status = 0; int issue_disconn = 0; int issue_close = 0; int issue_flush = 0; struct ib_event ibevent; unsigned long flags; int ret; if (!iwqp) { i40iw_pr_err("iwqp == NULL\n"); return; } spin_lock_irqsave(&iwqp->lock, flags); cm_id = iwqp->cm_id; /* make sure we havent already closed this connection */ if (!cm_id) { spin_unlock_irqrestore(&iwqp->lock, flags); return; } iwdev = to_iwdev(iwqp->ibqp.device); original_hw_tcp_state = iwqp->hw_tcp_state; original_ibqp_state = iwqp->ibqp_state; last_ae = iwqp->last_aeq; if (qp->term_flags) { issue_disconn = 1; issue_close = 1; iwqp->cm_id = NULL; /*When term timer expires after cm_timer, don't want *terminate-handler to issue cm_disconn which can re-free *a QP even after its refcnt=0. */ i40iw_terminate_del_timer(qp); if (!iwqp->flush_issued) { iwqp->flush_issued = 1; issue_flush = 1; } } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || ((original_ibqp_state == IB_QPS_RTS) && (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { issue_disconn = 1; if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) disconn_status = -ECONNRESET; } if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || (last_ae == I40IW_AE_LLP_CONNECTION_RESET) || iwdev->reset)) { issue_close = 1; iwqp->cm_id = NULL; if (!iwqp->flush_issued) { iwqp->flush_issued = 1; issue_flush = 1; } } spin_unlock_irqrestore(&iwqp->lock, flags); if (issue_flush && !iwqp->destroyed) { /* Flush the queues */ i40iw_flush_wqes(iwdev, iwqp); if (qp->term_flags && iwqp->ibqp.event_handler) { ibevent.device = iwqp->ibqp.device; ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; ibevent.element.qp = &iwqp->ibqp; iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); } } if (cm_id && cm_id->event_handler) { if (issue_disconn) { ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_DISCONNECT, disconn_status); if (ret) i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "disconnect event failed %s: - cm_id = %p\n", __func__, cm_id); } if (issue_close) { i40iw_qp_disconnect(iwqp); cm_id->provider_data = iwqp; ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); if (ret) i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "close event failed %s: - cm_id = %p\n", __func__, cm_id); cm_id->rem_ref(cm_id); } } } /** * i40iw_disconnect_worker - worker for connection close * @work: points or disconn structure */ static void i40iw_disconnect_worker(struct work_struct *work) { struct disconn_work *dwork = container_of(work, struct disconn_work, work); struct i40iw_qp *iwqp = dwork->iwqp; kfree(dwork); i40iw_cm_disconn_true(iwqp); i40iw_rem_ref(&iwqp->ibqp); } /** * i40iw_accept - registered call for connection to be accepted * @cm_id: cm information for passive connection * @conn_param: accpet parameters */ int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) { struct ib_qp *ibqp; struct i40iw_qp *iwqp; struct i40iw_device *iwdev; struct i40iw_sc_dev *dev; struct i40iw_cm_core *cm_core; struct i40iw_cm_node *cm_node; struct ib_qp_attr attr; int passive_state; struct ib_mr *ibmr; struct i40iw_pd *iwpd; u16 buf_len = 0; struct i40iw_kmem_info accept; enum i40iw_status_code status; u64 tagged_offset; unsigned long flags; memset(&attr, 0, sizeof(attr)); ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); if (!ibqp) return -EINVAL; iwqp = to_iwqp(ibqp); iwdev = iwqp->iwdev; dev = &iwdev->sc_dev; cm_core = &iwdev->cm_core; cm_node = (struct i40iw_cm_node *)cm_id->provider_data; if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { cm_node->ipv4 = true; cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); } else { cm_node->ipv4 = false; i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id); } i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "Accept vlan_id=%d\n", cm_node->vlan_id); if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { if (cm_node->loopbackpartner) i40iw_rem_ref_cm_node(cm_node->loopbackpartner); i40iw_rem_ref_cm_node(cm_node); return -EINVAL; } passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == I40IW_SEND_RESET_EVENT) { i40iw_rem_ref_cm_node(cm_node); return -ECONNRESET; } cm_node->cm_core->stats_accepts++; iwqp->cm_node = (void *)cm_node; cm_node->iwqp = iwqp; buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE; status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); if (status) return -ENOMEM; cm_node->pdata.size = conn_param->private_data_len; accept.addr = iwqp->ietf_mem.va; accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); memcpy(accept.addr + accept.size, conn_param->private_data, conn_param->private_data_len); /* setup our first outgoing iWarp send WQE (the IETF frame response) */ if ((cm_node->ipv4 && !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || (!cm_node->ipv4 && !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { iwpd = iwqp->iwpd; tagged_offset = (uintptr_t)iwqp->ietf_mem.va; ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, IB_ACCESS_LOCAL_WRITE, &tagged_offset); if (IS_ERR(ibmr)) { i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); return -ENOMEM; } ibmr->pd = &iwpd->ibpd; ibmr->device = iwpd->ibpd.device; iwqp->lsmm_mr = ibmr; if (iwqp->page) iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, (accept.size + conn_param->private_data_len), ibmr->lkey); } else { if (iwqp->page) iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0); } if (iwqp->page) kunmap(iwqp->page); iwqp->cm_id = cm_id; cm_node->cm_id = cm_id; cm_id->provider_data = (void *)iwqp; iwqp->active_conn = 0; cm_node->lsmm_size = accept.size + conn_param->private_data_len; i40iw_cm_init_tsa_conn(iwqp, cm_node); cm_id->add_ref(cm_id); i40iw_add_ref(&iwqp->ibqp); attr.qp_state = IB_QPS_RTS; cm_node->qhash_set = false; i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); cm_node->accelerated = true; spin_lock_irqsave(&cm_core->ht_lock, flags); list_move_tail(&cm_node->list, &cm_core->accelerated_list); spin_unlock_irqrestore(&cm_core->ht_lock, flags); status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); if (status) i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n"); if (cm_node->loopbackpartner) { cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; /* copy entire MPA frame to our cm_node's frame */ memcpy(cm_node->loopbackpartner->pdata_buf, conn_param->private_data, conn_param->private_data_len); i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); } if (cm_node->accept_pend) { atomic_dec(&cm_node->listener->pend_accepts_cnt); cm_node->accept_pend = 0; } return 0; } /** * i40iw_reject - registered call for connection to be rejected * @cm_id: cm information for passive connection * @pdata: private data to be sent * @pdata_len: private data length */ int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) { struct i40iw_device *iwdev; struct i40iw_cm_node *cm_node; struct i40iw_cm_node *loopback; cm_node = (struct i40iw_cm_node *)cm_id->provider_data; loopback = cm_node->loopbackpartner; cm_node->cm_id = cm_id; cm_node->pdata.size = pdata_len; iwdev = to_iwdev(cm_id->device); if (!iwdev) return -EINVAL; cm_node->cm_core->stats_rejects++; if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) return -EINVAL; if (loopback) { memcpy(&loopback->pdata_buf, pdata, pdata_len); loopback->pdata.size = pdata_len; } return i40iw_cm_reject(cm_node, pdata, pdata_len); } /** * i40iw_connect - registered call for connection to be established * @cm_id: cm information for passive connection * @conn_param: Information about the connection */ int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) { struct ib_qp *ibqp; struct i40iw_qp *iwqp; struct i40iw_device *iwdev; struct i40iw_cm_node *cm_node; struct i40iw_cm_info cm_info; struct sockaddr_in *laddr; struct sockaddr_in *raddr; struct sockaddr_in6 *laddr6; struct sockaddr_in6 *raddr6; int ret = 0; ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); if (!ibqp) return -EINVAL; iwqp = to_iwqp(ibqp); if (!iwqp) return -EINVAL; iwdev = to_iwdev(iwqp->ibqp.device); if (!iwdev) return -EINVAL; laddr = (struct sockaddr_in *)&cm_id->m_local_addr; raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; if (!(laddr->sin_port) || !(raddr->sin_port)) return -EINVAL; iwqp->active_conn = 1; iwqp->cm_id = NULL; cm_id->provider_data = iwqp; /* set up the connection params for the node */ if (cm_id->remote_addr.ss_family == AF_INET) { cm_info.ipv4 = true; memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); cm_info.loc_port = ntohs(laddr->sin_port); cm_info.rem_port = ntohs(raddr->sin_port); cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); } else { cm_info.ipv4 = false; i40iw_copy_ip_ntohl(cm_info.loc_addr, laddr6->sin6_addr.in6_u.u6_addr32); i40iw_copy_ip_ntohl(cm_info.rem_addr, raddr6->sin6_addr.in6_u.u6_addr32); cm_info.loc_port = ntohs(laddr6->sin6_port); cm_info.rem_port = ntohs(raddr6->sin6_port); i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id); } cm_info.cm_id = cm_id; cm_info.tos = cm_id->tos; cm_info.user_pri = rt_tos2priority(cm_id->tos); i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n", __func__, cm_id->tos, cm_info.user_pri); cm_id->add_ref(cm_id); cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info); if (IS_ERR(cm_node)) { ret = PTR_ERR(cm_node); cm_id->rem_ref(cm_id); return ret; } if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, raddr6->sin6_addr.in6_u.u6_addr32, sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED, I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) { ret = -EINVAL; goto err; } cm_node->qhash_set = true; } if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD)) { ret = -EINVAL; goto err; } cm_node->apbvt_set = true; iwqp->cm_node = cm_node; cm_node->iwqp = iwqp; iwqp->cm_id = cm_id; i40iw_add_ref(&iwqp->ibqp); if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { cm_node->state = I40IW_CM_STATE_SYN_SENT; ret = i40iw_send_syn(cm_node, 0); if (ret) goto err; } if (cm_node->loopbackpartner) { cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD; i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_MPA_REQ); } i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", cm_node->rem_port, cm_node, cm_node->cm_id); return 0; err: if (cm_info.ipv4) i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "Api - connect() FAILED: dest addr=%pI4", cm_info.rem_addr); else i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "Api - connect() FAILED: dest addr=%pI6", cm_info.rem_addr); i40iw_rem_ref_cm_node(cm_node); cm_id->rem_ref(cm_id); iwdev->cm_core.stats_connect_errs++; return ret; } /** * i40iw_create_listen - registered call creating listener * @cm_id: cm information for passive connection * @backlog: to max accept pending count */ int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) { struct i40iw_device *iwdev; struct i40iw_cm_listener *cm_listen_node; struct i40iw_cm_info cm_info; enum i40iw_status_code ret; struct sockaddr_in *laddr; struct sockaddr_in6 *laddr6; bool wildcard = false; iwdev = to_iwdev(cm_id->device); if (!iwdev) return -EINVAL; laddr = (struct sockaddr_in *)&cm_id->m_local_addr; laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; memset(&cm_info, 0, sizeof(cm_info)); if (laddr->sin_family == AF_INET) { cm_info.ipv4 = true; cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); cm_info.loc_port = ntohs(laddr->sin_port); if (laddr->sin_addr.s_addr != INADDR_ANY) cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); else wildcard = true; } else { cm_info.ipv4 = false; i40iw_copy_ip_ntohl(cm_info.loc_addr, laddr6->sin6_addr.in6_u.u6_addr32); cm_info.loc_port = ntohs(laddr6->sin6_port); if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id); else wildcard = true; } cm_info.backlog = backlog; cm_info.cm_id = cm_id; cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); if (!cm_listen_node) { i40iw_pr_err("cm_listen_node == NULL\n"); return -ENOMEM; } cm_id->provider_data = cm_listen_node; cm_listen_node->tos = cm_id->tos; cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); cm_info.user_pri = cm_listen_node->user_pri; if (!cm_listen_node->reused_node) { if (wildcard) { if (cm_info.ipv4) ret = i40iw_add_mqh_4(iwdev, &cm_info, cm_listen_node); else ret = i40iw_add_mqh_6(iwdev, &cm_info, cm_listen_node); if (ret) goto error; ret = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD); if (ret) goto error; } else { ret = i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_SYN, I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true); if (ret) goto error; cm_listen_node->qhash_set = true; ret = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD); if (ret) goto error; } } cm_id->add_ref(cm_id); cm_listen_node->cm_core->stats_listen_created++; return 0; error: i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); return -EINVAL; } /** * i40iw_destroy_listen - registered call to destroy listener * @cm_id: cm information for passive connection */ int i40iw_destroy_listen(struct iw_cm_id *cm_id) { struct i40iw_device *iwdev; iwdev = to_iwdev(cm_id->device); if (cm_id->provider_data) i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); else i40iw_pr_err("cm_id->provider_data was NULL\n"); cm_id->rem_ref(cm_id); return 0; } /** * i40iw_cm_event_connected - handle connected active node * @event: the info for cm_node of connection */ static void i40iw_cm_event_connected(struct i40iw_cm_event *event) { struct i40iw_qp *iwqp; struct i40iw_device *iwdev; struct i40iw_cm_core *cm_core; struct i40iw_cm_node *cm_node; struct i40iw_sc_dev *dev; struct ib_qp_attr attr; struct iw_cm_id *cm_id; unsigned long flags; int status; bool read0; cm_node = event->cm_node; cm_id = cm_node->cm_id; iwqp = (struct i40iw_qp *)cm_id->provider_data; iwdev = to_iwdev(iwqp->ibqp.device); dev = &iwdev->sc_dev; cm_core = &iwdev->cm_core; if (iwqp->destroyed) { status = -ETIMEDOUT; goto error; } i40iw_cm_init_tsa_conn(iwqp, cm_node); read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); if (iwqp->page) iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); if (iwqp->page) kunmap(iwqp->page); memset(&attr, 0, sizeof(attr)); attr.qp_state = IB_QPS_RTS; cm_node->qhash_set = false; i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); cm_node->accelerated = true; spin_lock_irqsave(&cm_core->ht_lock, flags); list_move_tail(&cm_node->list, &cm_core->accelerated_list); spin_unlock_irqrestore(&cm_core->ht_lock, flags); status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); if (status) i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n"); return; error: iwqp->cm_id = NULL; cm_id->provider_data = NULL; i40iw_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, status); cm_id->rem_ref(cm_id); i40iw_rem_ref_cm_node(event->cm_node); } /** * i40iw_cm_event_reset - handle reset * @event: the info for cm_node of connection */ static void i40iw_cm_event_reset(struct i40iw_cm_event *event) { struct i40iw_cm_node *cm_node = event->cm_node; struct iw_cm_id *cm_id = cm_node->cm_id; struct i40iw_qp *iwqp; if (!cm_id) return; iwqp = cm_id->provider_data; if (!iwqp) return; i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, "reset event %p - cm_id = %p\n", event->cm_node, cm_id); iwqp->cm_id = NULL; i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); } /** * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer * @work: pointer of cm event info. */ static void i40iw_cm_event_handler(struct work_struct *work) { struct i40iw_cm_event *event = container_of(work, struct i40iw_cm_event, event_work); struct i40iw_cm_node *cm_node; if (!event || !event->cm_node || !event->cm_node->cm_core) return; cm_node = event->cm_node; switch (event->type) { case I40IW_CM_EVENT_MPA_REQ: i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CONNECT_REQUEST, 0); break; case I40IW_CM_EVENT_RESET: i40iw_cm_event_reset(event); break; case I40IW_CM_EVENT_CONNECTED: if (!event->cm_node->cm_id || (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) break; i40iw_cm_event_connected(event); break; case I40IW_CM_EVENT_MPA_REJECT: if (!event->cm_node->cm_id || (cm_node->state == I40IW_CM_STATE_OFFLOADED)) break; i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); break; case I40IW_CM_EVENT_ABORTED: if (!event->cm_node->cm_id || (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) break; i40iw_event_connect_error(event); break; default: i40iw_pr_err("event type = %d\n", event->type); break; } event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); i40iw_rem_ref_cm_node(event->cm_node); kfree(event); } /** * i40iw_cm_post_event - queue event request for worker thread * @event: cm node's info for up event call */ static void i40iw_cm_post_event(struct i40iw_cm_event *event) { atomic_inc(&event->cm_node->ref_count); event->cm_info.cm_id->add_ref(event->cm_info.cm_id); INIT_WORK(&event->event_work, i40iw_cm_event_handler); queue_work(event->cm_node->cm_core->event_wq, &event->event_work); } /** * i40iw_qhash_ctrl - enable/disable qhash for list * @iwdev: device pointer * @parent_listen_node: parent listen node * @nfo: cm info node * @ipaddr: Pointer to IPv4 or IPv6 address * @ipv4: flag indicating IPv4 when true * @ifup: flag indicating interface up when true * * Enables or disables the qhash for the node in the child * listen list that matches ipaddr. If no matching IP was found * it will allocate and add a new child listen node to the * parent listen node. The listen_list_lock is assumed to be * held when called. */ static void i40iw_qhash_ctrl(struct i40iw_device *iwdev, struct i40iw_cm_listener *parent_listen_node, struct i40iw_cm_info *nfo, u32 *ipaddr, bool ipv4, bool ifup) { struct list_head *child_listen_list = &parent_listen_node->child_listen_list; struct i40iw_cm_listener *child_listen_node; struct list_head *pos, *tpos; enum i40iw_status_code ret; bool node_allocated = false; enum i40iw_quad_hash_manage_type op = ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; list_for_each_safe(pos, tpos, child_listen_list) { child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) goto set_qhash; } /* if not found then add a child listener if interface is going up */ if (!ifup) return; child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); if (!child_listen_node) return; node_allocated = true; memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node)); memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); set_qhash: memcpy(nfo->loc_addr, child_listen_node->loc_addr, sizeof(nfo->loc_addr)); nfo->vlan_id = child_listen_node->vlan_id; ret = i40iw_manage_qhash(iwdev, nfo, I40IW_QHASH_TYPE_TCP_SYN, op, NULL, false); if (!ret) { child_listen_node->qhash_set = ifup; if (node_allocated) list_add(&child_listen_node->child_listen_list, &parent_listen_node->child_listen_list); } else if (node_allocated) { kfree(child_listen_node); } } /** * i40iw_cm_teardown_connections - teardown QPs * @iwdev: device pointer * @ipaddr: Pointer to IPv4 or IPv6 address * @ipv4: flag indicating IPv4 when true * @disconnect_all: flag indicating disconnect all QPs * teardown QPs where source or destination addr matches ip addr */ void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr, struct i40iw_cm_info *nfo, bool disconnect_all) { struct i40iw_cm_core *cm_core = &iwdev->cm_core; struct list_head *list_core_temp; struct list_head *list_node; struct i40iw_cm_node *cm_node; unsigned long flags; struct list_head teardown_list; struct ib_qp_attr attr; INIT_LIST_HEAD(&teardown_list); spin_lock_irqsave(&cm_core->ht_lock, flags); list_for_each_safe(list_node, list_core_temp, &cm_core->accelerated_list) { cm_node = container_of(list_node, struct i40iw_cm_node, list); if (disconnect_all || (nfo->vlan_id == cm_node->vlan_id && (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { atomic_inc(&cm_node->ref_count); list_add(&cm_node->teardown_entry, &teardown_list); } } list_for_each_safe(list_node, list_core_temp, &cm_core->non_accelerated_list) { cm_node = container_of(list_node, struct i40iw_cm_node, list); if (disconnect_all || (nfo->vlan_id == cm_node->vlan_id && (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { atomic_inc(&cm_node->ref_count); list_add(&cm_node->teardown_entry, &teardown_list); } } spin_unlock_irqrestore(&cm_core->ht_lock, flags); list_for_each_safe(list_node, list_core_temp, &teardown_list) { cm_node = container_of(list_node, struct i40iw_cm_node, teardown_entry); attr.qp_state = IB_QPS_ERR; i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); if (iwdev->reset) i40iw_cm_disconn(cm_node->iwqp); i40iw_rem_ref_cm_node(cm_node); } } /** * i40iw_ifdown_notify - process an ifdown on an interface * @iwdev: device pointer * @ipaddr: Pointer to IPv4 or IPv6 address * @ipv4: flag indicating IPv4 when true * @ifup: flag indicating interface up when true */ void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev, u32 *ipaddr, bool ipv4, bool ifup) { struct i40iw_cm_core *cm_core = &iwdev->cm_core; unsigned long flags; struct i40iw_cm_listener *listen_node; static const u32 ip_zero[4] = { 0, 0, 0, 0 }; struct i40iw_cm_info nfo; u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); enum i40iw_status_code ret; enum i40iw_quad_hash_manage_type op = ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; nfo.vlan_id = vlan_id; nfo.ipv4 = ipv4; /* Disable or enable qhash for listeners */ spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { if (vlan_id == listen_node->vlan_id && (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) || !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) { memcpy(nfo.loc_addr, listen_node->loc_addr, sizeof(nfo.loc_addr)); nfo.loc_port = listen_node->loc_port; nfo.user_pri = listen_node->user_pri; if (!list_empty(&listen_node->child_listen_list)) { i40iw_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, ifup); } else if (memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)) { ret = i40iw_manage_qhash(iwdev, &nfo, I40IW_QHASH_TYPE_TCP_SYN, op, NULL, false); if (!ret) listen_node->qhash_set = ifup; } } } spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); /* teardown connected qp's on ifdown */ if (!ifup) i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false); }
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