| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mustafa Ismail | 20273 | 99.50% | 6 | 37.50% |
| Shiraz Saleem | 47 | 0.23% | 2 | 12.50% |
| Tatyana Nikolova | 21 | 0.10% | 2 | 12.50% |
| Ira Weiny | 14 | 0.07% | 1 | 6.25% |
| Arnd Bergmann | 7 | 0.03% | 1 | 6.25% |
| Nikita Zhandarovich | 6 | 0.03% | 1 | 6.25% |
| Sindhu Devale | 4 | 0.02% | 1 | 6.25% |
| Guillaume Nault | 2 | 0.01% | 1 | 6.25% |
| Krzysztof Kozlowski | 1 | 0.00% | 1 | 6.25% |
| Total | 20375 | 16 |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /* Copyright (c) 2015 - 2021 Intel Corporation */ #include "main.h" #include "trace.h" static void irdma_cm_post_event(struct irdma_cm_event *event); static void irdma_disconnect_worker(struct work_struct *work); /** * irdma_free_sqbuf - put back puda buffer if refcount is 0 * @vsi: The VSI structure of the device * @bufp: puda buffer to free */ void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) { struct irdma_puda_buf *buf = bufp; struct irdma_puda_rsrc *ilq = vsi->ilq; if (refcount_dec_and_test(&buf->refcount)) irdma_puda_ret_bufpool(ilq, buf); } /** * irdma_record_ird_ord - Record IRD/ORD passed in * @cm_node: connection's node * @conn_ird: connection IRD * @conn_ord: connection ORD */ static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, u32 conn_ord) { if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) conn_ird = cm_node->dev->hw_attrs.max_hw_ird; if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 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; } /** * irdma_copy_ip_ntohl - copy IP address from network to host * @dst: IP address in host order * @src: IP address in network order (big endian) */ void irdma_copy_ip_ntohl(u32 *dst, __be32 *src) { *dst++ = ntohl(*src++); *dst++ = ntohl(*src++); *dst++ = ntohl(*src++); *dst = ntohl(*src); } /** * irdma_copy_ip_htonl - copy IP address from host to network order * @dst: IP address in network order (big endian) * @src: IP address in host order */ void irdma_copy_ip_htonl(__be32 *dst, u32 *src) { *dst++ = htonl(*src++); *dst++ = htonl(*src++); *dst++ = htonl(*src++); *dst = htonl(*src); } /** * irdma_get_addr_info * @cm_node: contains ip/tcp info * @cm_info: to get a copy of the cm_node ip/tcp info */ static void irdma_get_addr_info(struct irdma_cm_node *cm_node, struct irdma_cm_info *cm_info) { memset(cm_info, 0, sizeof(*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; } /** * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection * @cm_node: connection's node * @event: upper layer's cm event */ static inline void irdma_fill_sockaddr4(struct irdma_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]); } /** * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection * @cm_node: connection's node * @event: upper layer's cm event */ static inline void irdma_fill_sockaddr6(struct irdma_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); irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, cm_node->loc_addr); irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, cm_node->rem_addr); } /** * irdma_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 irdma_get_cmevent_info(struct irdma_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 = 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; } } /** * irdma_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 irdma_send_cm_event(struct irdma_cm_node *cm_node, struct iw_cm_id *cm_id, enum iw_cm_event_type type, int status) { struct iw_cm_event event = {}; event.event = type; event.status = status; trace_irdma_send_cm_event(cm_node, cm_id, type, status, __builtin_return_address(0)); ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", cm_node, cm_id, cm_node->accelerated, cm_node->state, type, status); switch (type) { case IW_CM_EVENT_CONNECT_REQUEST: if (cm_node->ipv4) irdma_fill_sockaddr4(cm_node, &event); else irdma_fill_sockaddr6(cm_node, &event); event.provider_data = cm_node; event.private_data = 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: irdma_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: case IW_CM_EVENT_CLOSE: /* Wait if we are in RTS but havent issued the iwcm event upcall */ if (!cm_node->accelerated) wait_for_completion(&cm_node->establish_comp); break; default: return -EINVAL; } return cm_id->event_handler(cm_id, &event); } /** * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks * @cm_core: cm's core * @timer_list: a timer list to which cm_node will be selected */ static void irdma_timer_list_prep(struct irdma_cm_core *cm_core, struct list_head *timer_list) { struct irdma_cm_node *cm_node; int bkt; hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { if ((cm_node->close_entry || cm_node->send_entry) && refcount_inc_not_zero(&cm_node->refcnt)) list_add(&cm_node->timer_entry, timer_list); } } /** * irdma_create_event - create cm event * @cm_node: connection's node * @type: Event type to generate */ static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node, enum irdma_cm_event_type type) { struct irdma_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; ibdev_dbg(&cm_node->iwdev->ibdev, "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); trace_irdma_create_event(cm_node, type, __builtin_return_address(0)); irdma_cm_post_event(event); return event; } /** * irdma_free_retrans_entry - free send entry * @cm_node: connection's node */ static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node) { struct irdma_device *iwdev = cm_node->iwdev; struct irdma_timer_entry *send_entry; send_entry = cm_node->send_entry; if (!send_entry) return; cm_node->send_entry = NULL; irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); kfree(send_entry); refcount_dec(&cm_node->refcnt); } /** * irdma_cleanup_retrans_entry - free send entry with lock * @cm_node: connection's node */ static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) { unsigned long flags; spin_lock_irqsave(&cm_node->retrans_list_lock, flags); irdma_free_retrans_entry(cm_node); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); } /** * irdma_form_ah_cm_frame - get a free packet and build frame with address handle * @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 irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, struct irdma_kmem_info *options, struct irdma_kmem_info *hdr, struct irdma_mpa_priv_info *pdata, u8 flags) { struct irdma_puda_buf *sqbuf; struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; u8 *buf; struct tcphdr *tcph; u16 pktsize; u32 opts_len = 0; u32 pd_len = 0; u32 hdr_len = 0; if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n"); return NULL; } sqbuf = irdma_puda_get_bufpool(vsi->ilq); if (!sqbuf) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n"); return NULL; } sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; buf = sqbuf->mem.va; if (options) opts_len = (u32)options->size; if (hdr) hdr_len = hdr->size; if (pdata) pd_len = pdata->size; pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; memset(buf, 0, sizeof(*tcph)); sqbuf->totallen = pktsize; sqbuf->tcphlen = sizeof(*tcph) + opts_len; sqbuf->scratch = cm_node; tcph = (struct tcphdr *)buf; buf += sizeof(*tcph); 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); refcount_set(&sqbuf->refcount, 1); print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 16, 8, sqbuf->mem.va, sqbuf->totallen, false); return sqbuf; } /** * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet * @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 irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, struct irdma_kmem_info *options, struct irdma_kmem_info *hdr, struct irdma_mpa_priv_info *pdata, u8 flags) { struct irdma_puda_buf *sqbuf; struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; u8 *buf; struct tcphdr *tcph; struct iphdr *iph; struct ipv6hdr *ip6h; struct ethhdr *ethh; u16 pktsize; u16 eth_hlen = ETH_HLEN; u32 opts_len = 0; u32 pd_len = 0; u32 hdr_len = 0; u16 vtag; sqbuf = irdma_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_N_VID) eth_hlen += 4; if (cm_node->ipv4) pktsize = sizeof(*iph) + sizeof(*tcph); else pktsize = sizeof(*ip6h) + sizeof(*tcph); pktsize += opts_len + hdr_len + pd_len; memset(buf, 0, eth_hlen + pktsize); sqbuf->totallen = pktsize + eth_hlen; sqbuf->maclen = eth_hlen; sqbuf->tcphlen = sizeof(*tcph) + opts_len; sqbuf->scratch = cm_node; ethh = (struct ethhdr *)buf; buf += eth_hlen; if (cm_node->do_lpb) sqbuf->do_lpb = true; 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_N_VID) { ((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(pktsize); 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_N_VID) { ((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(pktsize - sizeof(*ip6h)); ip6h->nexthdr = 6; ip6h->hop_limit = 128; irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, cm_node->loc_addr); irdma_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); refcount_set(&sqbuf->refcount, 1); print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 16, 8, sqbuf->mem.va, sqbuf->totallen, false); return sqbuf; } /** * irdma_send_reset - Send RST packet * @cm_node: connection's node */ int irdma_send_reset(struct irdma_cm_node *cm_node) { struct irdma_puda_buf *sqbuf; int flags = SET_RST | SET_ACK; trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0)); sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, flags); if (!sqbuf) return -ENOMEM; ibdev_dbg(&cm_node->iwdev->ibdev, "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", __builtin_return_address(0), cm_node, cm_node->cm_id, cm_node->accelerated, cm_node->state, cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 1); } /** * irdma_active_open_err - send event for active side cm error * @cm_node: connection's node * @reset: Flag to send reset or not */ static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) { trace_irdma_active_open_err(cm_node, reset, __builtin_return_address(0)); irdma_cleanup_retrans_entry(cm_node); cm_node->cm_core->stats_connect_errs++; if (reset) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state=%d\n", cm_node, cm_node->state); refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); } cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); } /** * irdma_passive_open_err - handle passive side cm error * @cm_node: connection's node * @reset: send reset or just free cm_node */ static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) { irdma_cleanup_retrans_entry(cm_node); cm_node->cm_core->stats_passive_errs++; cm_node->state = IRDMA_CM_STATE_CLOSED; ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n", cm_node, cm_node->state); trace_irdma_passive_open_err(cm_node, reset, __builtin_return_address(0)); if (reset) irdma_send_reset(cm_node); else irdma_rem_ref_cm_node(cm_node); } /** * irdma_event_connect_error - to create connect error event * @event: cm information for connect event */ static void irdma_event_connect_error(struct irdma_cm_event *event) { struct irdma_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; irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, -ECONNRESET); irdma_rem_ref_cm_node(event->cm_node); } /** * irdma_process_options - process options from TCP header * @cm_node: connection's node * @optionsloc: point to start of options * @optionsize: size of all options * @syn_pkt: flag if syn packet */ static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_pkt) { 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->base.optionnum) { case OPTION_NUM_EOL: offset = optionsize; break; case OPTION_NUM_NONE: offset += 1; continue; case OPTION_NUM_MSS: ibdev_dbg(&cm_node->iwdev->ibdev, "CM: MSS Length: %d Offset: %d Size: %d\n", all_options->mss.len, offset, optionsize); got_mss_option = 1; if (all_options->mss.len != 4) return -EINVAL; tmp = ntohs(all_options->mss.mss); if ((cm_node->ipv4 && (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || (!cm_node->ipv4 && (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) return -EINVAL; if (tmp < cm_node->tcp_cntxt.mss) cm_node->tcp_cntxt.mss = tmp; break; case OPTION_NUM_WINDOW_SCALE: cm_node->tcp_cntxt.snd_wscale = all_options->windowscale.shiftcount; break; default: ibdev_dbg(&cm_node->iwdev->ibdev, "CM: Unsupported TCP Option: %x\n", all_options->base.optionnum); break; } offset += all_options->base.len; } if (!got_mss_option && syn_pkt) cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; return 0; } /** * irdma_handle_tcp_options - setup TCP context info after parsing TCP options * @cm_node: connection's node * @tcph: pointer tcp header * @optionsize: size of options rcvd * @passive: active or passive flag */ static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node, struct tcphdr *tcph, int optionsize, int passive) { u8 *optionsloc = (u8 *)&tcph[1]; int ret; if (optionsize) { ret = irdma_process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn); if (ret) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: Node %p, Sending Reset\n", cm_node); if (passive) irdma_passive_open_err(cm_node, true); else irdma_active_open_err(cm_node, true); return ret; } } 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; } /** * irdma_build_mpa_v1 - build a MPA V1 frame * @cm_node: connection's node * @start_addr: address where to build frame * @mpa_key: to do read0 or write0 */ static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v1 *mpa_frame = 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); } /** * irdma_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 irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v2 *mpa_frame = 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 */ irdma_build_mpa_v1(cm_node, start_addr, mpa_key); mpa_frame->flags |= IETF_MPA_V2_FLAG; if (cm_node->iwdev->iw_ooo) { mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; cm_node->rcv_mark_en = true; } mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 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); } /** * irdma_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 irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, struct irdma_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); irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); break; case IETF_MPA_V2: hdr_len = sizeof(struct ietf_mpa_v2); irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); break; default: break; } return hdr_len; } /** * irdma_send_mpa_request - active node send mpa request to passive node * @cm_node: connection's node */ static int irdma_send_mpa_request(struct irdma_cm_node *cm_node) { struct irdma_puda_buf *sqbuf; cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, &cm_node->mpa_hdr, MPA_KEY_REQUEST); if (!cm_node->mpa_hdr.size) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: mpa size = %d\n", cm_node->mpa_hdr.size); return -EINVAL; } sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, &cm_node->mpa_hdr, &cm_node->pdata, SET_ACK); if (!sqbuf) return -ENOMEM; return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 0); } /** * irdma_send_mpa_reject - * @cm_node: connection's node * @pdata: reject data for connection * @plen: length of reject data */ static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node, const void *pdata, u8 plen) { struct irdma_puda_buf *sqbuf; struct irdma_mpa_priv_info priv_info; cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; cm_node->mpa_hdr.size = irdma_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 = pdata; priv_info.size = plen; sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, &cm_node->mpa_hdr, &priv_info, SET_ACK | SET_FIN); if (!sqbuf) return -ENOMEM; cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 0); } /** * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD * @cm_node: connection's node * @buf: Data pointer */ static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, u8 *buf) { struct ietf_mpa_v2 *mpa_v2_frame; struct ietf_rtr_msg *rtr_msg; u16 ird_size; u16 ord_size; u16 ctrl_ord; u16 ctrl_ird; mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 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 -EOPNOTSUPP; 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 != IRDMA_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)) /* Remote peer doesn't support RDMA0_READ */ return -EOPNOTSUPP; if (cm_node->ord_size > ird_size) cm_node->ord_size = ird_size; if (cm_node->ird_size < ord_size) /* no resources available */ return -EINVAL; } 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 -EOPNOTSUPP; ibdev_dbg(&cm_node->iwdev->ibdev, "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n", cm_node->ord_size, cm_node->ird_size); trace_irdma_negotiate_mpa_v2(cm_node); return 0; } /** * irdma_parse_mpa - process an IETF MPA frame * @cm_node: connection's node * @buf: Data pointer * @type: to return accept or reject * @len: Len of mpa buffer */ static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, u32 len) { struct ietf_mpa_v1 *mpa_frame; int mpa_hdr_len, priv_data_len, ret; *type = IRDMA_MPA_REQUEST_ACCEPT; if (len < sizeof(struct ietf_mpa_v1)) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: ietf buffer small (%x)\n", len); return -EINVAL; } mpa_frame = (struct ietf_mpa_v1 *)buf; 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) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: private_data too big %d\n", priv_data_len); return -EOVERFLOW; } if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: unsupported mpa rev = %d\n", mpa_frame->rev); return -EINVAL; } if (mpa_frame->rev > cm_node->mpa_frame_rev) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n", mpa_frame->rev); return -EINVAL; } cm_node->mpa_frame_rev = mpa_frame->rev; if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: Unexpected MPA Key received\n"); return -EINVAL; } } else { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: Unexpected MPA Key received\n"); return -EINVAL; } } if (priv_data_len + mpa_hdr_len > len) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: ietf buffer len(%x + %x != %x)\n", priv_data_len, mpa_hdr_len, len); return -EOVERFLOW; } if (len > IRDMA_MAX_CM_BUF) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: ietf buffer large len = %d\n", len); return -EOVERFLOW; } switch (mpa_frame->rev) { case IETF_MPA_V2: mpa_hdr_len += IETF_RTR_MSG_SIZE; ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); if (ret) return ret; break; case IETF_MPA_V1: default: break; } memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); cm_node->pdata.size = priv_data_len; if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) *type = IRDMA_MPA_REQUEST_REJECT; if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) cm_node->snd_mark_en = true; return 0; } /** * irdma_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: * irdma_rem_ref_cm_node(cm_core, cm_node); * irdma_schedule_cm_timer(...) * refcount_inc(&cm_node->refcnt); */ int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, struct irdma_puda_buf *sqbuf, enum irdma_timer_type type, int send_retrans, int close_when_complete) { struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; struct irdma_cm_core *cm_core = cm_node->cm_core; struct irdma_timer_entry *new_send; u32 was_timer_set; unsigned long flags; new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); if (!new_send) { if (type != IRDMA_TIMER_TYPE_CLOSE) irdma_free_sqbuf(vsi, sqbuf); return -ENOMEM; } new_send->retrycount = IRDMA_DEFAULT_RETRYS; new_send->retranscount = IRDMA_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 == IRDMA_TIMER_TYPE_CLOSE) { new_send->timetosend += (HZ / 10); if (cm_node->close_entry) { kfree(new_send); ibdev_dbg(&cm_node->iwdev->ibdev, "CM: already close entry\n"); return -EINVAL; } cm_node->close_entry = new_send; } else { /* type == IRDMA_TIMER_TYPE_SEND */ spin_lock_irqsave(&cm_node->retrans_list_lock, flags); cm_node->send_entry = new_send; refcount_inc(&cm_node->refcnt); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; refcount_inc(&sqbuf->refcount); irdma_puda_send_buf(vsi->ilq, sqbuf); if (!send_retrans) { irdma_cleanup_retrans_entry(cm_node); if (close_when_complete) irdma_rem_ref_cm_node(cm_node); return 0; } } 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 0; } /** * irdma_retrans_expired - Could not rexmit the packet * @cm_node: connection's node */ static void irdma_retrans_expired(struct irdma_cm_node *cm_node) { enum irdma_cm_node_state state = cm_node->state; cm_node->state = IRDMA_CM_STATE_CLOSED; switch (state) { case IRDMA_CM_STATE_SYN_RCVD: case IRDMA_CM_STATE_CLOSING: irdma_rem_ref_cm_node(cm_node); break; case IRDMA_CM_STATE_FIN_WAIT1: case IRDMA_CM_STATE_LAST_ACK: irdma_send_reset(cm_node); break; default: refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); break; } } /** * irdma_handle_close_entry - for handling retry/timeouts * @cm_node: connection's node * @rem_node: flag for remove cm_node */ static void irdma_handle_close_entry(struct irdma_cm_node *cm_node, u32 rem_node) { struct irdma_timer_entry *close_entry = cm_node->close_entry; struct irdma_qp *iwqp; unsigned long flags; if (!close_entry) return; iwqp = (struct irdma_qp *)close_entry->sqbuf; if (iwqp) { spin_lock_irqsave(&iwqp->lock, flags); if (iwqp->cm_id) { iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; iwqp->last_aeq = IRDMA_AE_RESET_SENT; iwqp->ibqp_state = IB_QPS_ERR; spin_unlock_irqrestore(&iwqp->lock, flags); irdma_cm_disconn(iwqp); } else { spin_unlock_irqrestore(&iwqp->lock, flags); } } else if (rem_node) { /* TIME_WAIT state */ irdma_rem_ref_cm_node(cm_node); } kfree(close_entry); cm_node->close_entry = NULL; } /** * irdma_cm_timer_tick - system's timer expired callback * @t: Pointer to timer_list */ static void irdma_cm_timer_tick(struct timer_list *t) { unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; struct irdma_cm_node *cm_node; struct irdma_timer_entry *send_entry, *close_entry; struct list_head *list_core_temp; struct list_head *list_node; struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); struct irdma_sc_vsi *vsi; u32 settimer = 0; unsigned long timetosend; unsigned long flags; struct list_head timer_list; INIT_LIST_HEAD(&timer_list); rcu_read_lock(); irdma_timer_list_prep(cm_core, &timer_list); rcu_read_unlock(); list_for_each_safe (list_node, list_core_temp, &timer_list) { cm_node = container_of(list_node, struct irdma_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 { irdma_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 != IRDMA_CM_STATE_OFFLOADED) { if (nexttimeout > send_entry->timetosend || !settimer) { nexttimeout = send_entry->timetosend; settimer = 1; } } else { irdma_free_retrans_entry(cm_node); } goto done; } if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || cm_node->state == IRDMA_CM_STATE_CLOSED) { irdma_free_retrans_entry(cm_node); goto done; } if (!send_entry->retranscount || !send_entry->retrycount) { irdma_free_retrans_entry(cm_node); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); irdma_retrans_expired(cm_node); cm_node->state = IRDMA_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) { refcount_inc(&send_entry->sqbuf->refcount); irdma_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 = (IRDMA_RETRY_TIMEOUT << (IRDMA_DEFAULT_RETRANS - send_entry->retranscount)); send_entry->timetosend = jiffies + min(timetosend, IRDMA_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; irdma_free_retrans_entry(cm_node); if (close_when_complete) irdma_rem_ref_cm_node(cm_node); } done: spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); irdma_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); } } /** * irdma_send_syn - send SYN packet * @cm_node: connection's node * @sendack: flag to set ACK bit or not */ int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) { struct irdma_puda_buf *sqbuf; int flags = SET_SYN; char optionsbuf[sizeof(struct option_mss) + sizeof(struct option_windowscale) + sizeof(struct option_base) + TCP_OPTIONS_PADDING]; struct irdma_kmem_info opts; int optionssize = 0; /* Sending MSS option */ union all_known_options *options; opts.addr = optionsbuf; if (!cm_node) return -EINVAL; options = (union all_known_options *)&optionsbuf[optionssize]; options->mss.optionnum = OPTION_NUM_MSS; options->mss.len = sizeof(struct option_mss); options->mss.mss = htons(cm_node->tcp_cntxt.mss); optionssize += sizeof(struct option_mss); options = (union all_known_options *)&optionsbuf[optionssize]; options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; options->windowscale.len = sizeof(struct option_windowscale); options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; optionssize += sizeof(struct option_windowscale); options = (union all_known_options *)&optionsbuf[optionssize]; options->eol = OPTION_NUM_EOL; optionssize += 1; if (sendack) flags |= SET_ACK; opts.size = optionssize; sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, flags); if (!sqbuf) return -ENOMEM; return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 0); } /** * irdma_send_ack - Send ACK packet * @cm_node: connection's node */ void irdma_send_ack(struct irdma_cm_node *cm_node) { struct irdma_puda_buf *sqbuf; struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); if (sqbuf) irdma_puda_send_buf(vsi->ilq, sqbuf); } /** * irdma_send_fin - Send FIN pkt * @cm_node: connection's node */ static int irdma_send_fin(struct irdma_cm_node *cm_node) { struct irdma_puda_buf *sqbuf; sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); if (!sqbuf) return -ENOMEM; return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 0); } /** * irdma_find_listener - find a cm node listening on this addr-port pair * @cm_core: cm's core * @dst_addr: listener ip addr * @ipv4: flag indicating IPv4 when true * @dst_port: listener tcp port num * @vlan_id: virtual LAN ID * @listener_state: state to match with listen node's */ static struct irdma_cm_listener * irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, u16 dst_port, u16 vlan_id, enum irdma_cm_listener_state listener_state) { struct irdma_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_list, list) { memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); listen_port = listen_node->loc_port; if (listen_node->ipv4 != ipv4 || listen_port != dst_port || !(listener_state & listen_node->listener_state)) continue; /* compare node pair, return node handle if a match */ if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && vlan_id == listen_node->vlan_id)) { refcount_inc(&listen_node->refcnt); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); trace_irdma_find_listener(listen_node); return listen_node; } } spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); return NULL; } /** * irdma_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 int irdma_del_multiple_qhash(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, struct irdma_cm_listener *cm_parent_listen_node) { struct irdma_cm_listener *child_listen_node; struct list_head *pos, *tpos; unsigned long flags; int ret = -EINVAL; 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 irdma_cm_listener, child_listen_list); if (child_listen_node->ipv4) ibdev_dbg(&iwdev->ibdev, "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 ibdev_dbg(&iwdev->ibdev, "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); trace_irdma_del_multiple_qhash(child_listen_node); 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 = irdma_manage_qhash(iwdev, cm_info, IRDMA_QHASH_TYPE_TCP_SYN, IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); child_listen_node->qhash_set = false; } else { ret = 0; } ibdev_dbg(&iwdev->ibdev, "CM: Child listen node freed = %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; } static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4) { struct net_device *ndev = NULL; rcu_read_lock(); if (ipv4) { ndev = ip_dev_find(&init_net, htonl(loc_addr[0])); } else if (IS_ENABLED(CONFIG_IPV6)) { struct net_device *ip_dev; struct in6_addr laddr6; irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, loc_addr); for_each_netdev_rcu (&init_net, ip_dev) { if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { ndev = ip_dev; break; } } } if (!ndev) goto done; if (is_vlan_dev(ndev)) prio = (vlan_dev_get_egress_qos_mask(ndev, prio) & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; if (ipv4) dev_put(ndev); done: rcu_read_unlock(); return prio; } /** * irdma_get_vlan_mac_ipv6 - Gets the vlan and mac * @addr: local IPv6 address * @vlan_id: vlan id for the given IPv6 address * @mac: mac address for the given IPv6 address * * Returns the vlan id and mac for an IPv6 address. */ void irdma_get_vlan_mac_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) { struct net_device *ip_dev = NULL; struct in6_addr laddr6; if (!IS_ENABLED(CONFIG_IPV6)) return; irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); if (vlan_id) *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ if (mac) eth_zero_addr(mac); 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); if (ip_dev->dev_addr && mac) ether_addr_copy(mac, ip_dev->dev_addr); break; } } rcu_read_unlock(); } /** * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address * @addr: local IPv4 address */ u16 irdma_get_vlan_ipv4(u32 *addr) { struct net_device *netdev; u16 vlan_id = 0xFFFF; 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; } /** * irdma_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 int irdma_add_mqh_6(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, struct irdma_cm_listener *cm_parent_listen_node) { struct net_device *ip_dev; struct inet6_dev *idev; struct inet6_ifaddr *ifp, *tmp; struct irdma_cm_listener *child_listen_node; unsigned long flags; int ret = 0; rtnl_lock(); for_each_netdev(&init_net, ip_dev) { if (!(ip_dev->flags & IFF_UP)) continue; if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && ip_dev != iwdev->netdev) continue; idev = __in6_dev_get(ip_dev); if (!idev) { ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); break; } list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { ibdev_dbg(&iwdev->ibdev, "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_KERNEL); ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", child_listen_node); if (!child_listen_node) { ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); ret = -ENOMEM; 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)); irdma_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)); if (!iwdev->vsi.dscp_mode) cm_info->user_pri = irdma_iw_get_vlan_prio(child_listen_node->loc_addr, cm_info->user_pri, false); ret = irdma_manage_qhash(iwdev, cm_info, IRDMA_QHASH_TYPE_TCP_SYN, IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true); if (ret) { kfree(child_listen_node); continue; } trace_irdma_add_mqh_6(iwdev, child_listen_node, ip_dev->dev_addr); 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++; } } exit: rtnl_unlock(); return ret; } /** * irdma_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 int irdma_add_mqh_4(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, struct irdma_cm_listener *cm_parent_listen_node) { struct net_device *ip_dev; struct in_device *idev; struct irdma_cm_listener *child_listen_node; unsigned long flags; const struct in_ifaddr *ifa; int ret = 0; rtnl_lock(); for_each_netdev(&init_net, ip_dev) { if (!(ip_dev->flags & IFF_UP)) continue; if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && ip_dev != iwdev->netdev) continue; idev = in_dev_get(ip_dev); if (!idev) continue; in_dev_for_each_ifa_rtnl(ifa, idev) { ibdev_dbg(&iwdev->ibdev, "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), ip_dev->dev_addr); child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); cm_parent_listen_node->cm_core->stats_listen_nodes_created++; ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", child_listen_node); if (!child_listen_node) { ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); in_dev_put(idev); ret = -ENOMEM; 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)); 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)); if (!iwdev->vsi.dscp_mode) cm_info->user_pri = irdma_iw_get_vlan_prio(child_listen_node->loc_addr, cm_info->user_pri, true); ret = irdma_manage_qhash(iwdev, cm_info, IRDMA_QHASH_TYPE_TCP_SYN, IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true); if (ret) { kfree(child_listen_node); cm_parent_listen_node->cm_core ->stats_listen_nodes_created--; continue; } trace_irdma_add_mqh_4(iwdev, child_listen_node, ip_dev->dev_addr); 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); } in_dev_put(idev); } exit: rtnl_unlock(); return ret; } /** * irdma_add_mqh - Adds multiple qhashes * @iwdev: iWarp device * @cm_info: CM info for parent listen node * @cm_listen_node: The parent listen node */ static int irdma_add_mqh(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, struct irdma_cm_listener *cm_listen_node) { if (cm_info->ipv4) return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); else return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); } /** * irdma_reset_list_prep - add connection nodes slated for reset to list * @cm_core: cm's core * @listener: pointer to listener node * @reset_list: a list to which cm_node will be selected */ static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, struct irdma_cm_listener *listener, struct list_head *reset_list) { struct irdma_cm_node *cm_node; int bkt; hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { if (cm_node->listener == listener && !cm_node->accelerated && refcount_inc_not_zero(&cm_node->refcnt)) list_add(&cm_node->reset_entry, reset_list); } } /** * irdma_dec_refcnt_listen - delete listener and associated cm nodes * @cm_core: cm's core * @listener: pointer to listener node * @free_hanging_nodes: to free associated cm_nodes * @apbvt_del: flag to delete the apbvt */ static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, struct irdma_cm_listener *listener, int free_hanging_nodes, bool apbvt_del) { int err; struct list_head *list_pos; struct list_head *list_temp; struct irdma_cm_node *cm_node; struct list_head reset_list; struct irdma_cm_info nfo; enum irdma_cm_node_state old_state; unsigned long flags; trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); /* free non-accelerated child nodes for this listener */ INIT_LIST_HEAD(&reset_list); if (free_hanging_nodes) { rcu_read_lock(); irdma_reset_list_prep(cm_core, listener, &reset_list); rcu_read_unlock(); } list_for_each_safe (list_pos, list_temp, &reset_list) { cm_node = container_of(list_pos, struct irdma_cm_node, reset_entry); if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { irdma_rem_ref_cm_node(cm_node); continue; } irdma_cleanup_retrans_entry(cm_node); err = irdma_send_reset(cm_node); if (err) { cm_node->state = IRDMA_CM_STATE_CLOSED; ibdev_dbg(&cm_node->iwdev->ibdev, "CM: send reset failed\n"); } else { old_state = cm_node->state; cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) irdma_rem_ref_cm_node(cm_node); } } if (refcount_dec_and_test(&listener->refcnt)) { spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_del(&listener->list); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); if (apbvt_del) irdma_del_apbvt(listener->iwdev, listener->apbvt_entry); 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; nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; if (!list_empty(&listener->child_listen_list)) { irdma_del_multiple_qhash(listener->iwdev, &nfo, listener); } else { if (listener->qhash_set) irdma_manage_qhash(listener->iwdev, &nfo, IRDMA_QHASH_TYPE_TCP_SYN, IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); } cm_core->stats_listen_destroyed++; cm_core->stats_listen_nodes_destroyed++; ibdev_dbg(&listener->iwdev->ibdev, "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", listener->loc_port, listener->loc_addr, listener, listener->cm_id, listener->qhash_set, listener->vlan_id, apbvt_del); kfree(listener); listener = NULL; return 0; } return -EINVAL; } /** * irdma_cm_del_listen - delete a listener * @cm_core: cm's core * @listener: passive connection's listener * @apbvt_del: flag to delete apbvt */ static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, struct irdma_cm_listener *listener, bool apbvt_del) { listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; listener->cm_id = NULL; return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); } /** * irdma_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 irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, u32 dst_ip, int arpindex) { struct rtable *rt; struct neighbour *neigh; int rc = arpindex; __be32 dst_ipaddr = htonl(dst_ip); __be32 src_ipaddr = htonl(src_ip); rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0, RT_SCOPE_UNIVERSE); if (IS_ERR(rt)) { ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); return -EINVAL; } neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); if (!neigh) goto exit; if (neigh->nud_state & NUD_VALID) rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); else neigh_event_send(neigh, NULL); if (neigh) neigh_release(neigh); exit: ip_rt_put(rt); return rc; } /** * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup * @src_addr: local ipv6 sock address * @dst_addr: destination ipv6 sock address */ static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, struct sockaddr_in6 *dst_addr) { struct dst_entry *dst = NULL; if ((IS_ENABLED(CONFIG_IPV6))) { struct flowi6 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; } /** * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address * @iwdev: iwarp device structure * @src: local ip address * @dest: remote ip address * @arpindex: if there is an arp entry */ static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, u32 *dest, int arpindex) { struct neighbour *neigh; int rc = arpindex; struct dst_entry *dst; struct sockaddr_in6 dst_addr = {}; struct sockaddr_in6 src_addr = {}; dst_addr.sin6_family = AF_INET6; irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); src_addr.sin6_family = AF_INET6; irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); if (!dst || dst->error) { if (dst) { dst_release(dst); ibdev_dbg(&iwdev->ibdev, "CM: ip6_route_output returned dst->error = %d\n", dst->error); } return -EINVAL; } neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); if (!neigh) goto exit; ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", neigh->ha); trace_irdma_addr_resolve(iwdev, neigh->ha); if (neigh->nud_state & NUD_VALID) rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); else neigh_event_send(neigh, NULL); if (neigh) neigh_release(neigh); exit: dst_release(dst); return rc; } /** * irdma_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: local ip addr * @vlan_id: local VLAN ID */ struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, u16 rem_port, u32 *rem_addr, u16 loc_port, u32 *loc_addr, u16 vlan_id) { struct irdma_cm_node *cm_node; u32 key = (rem_port << 16) | loc_port; rcu_read_lock(); hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { if (cm_node->vlan_id == vlan_id && cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { if (!refcount_inc_not_zero(&cm_node->refcnt)) goto exit; rcu_read_unlock(); trace_irdma_find_node(cm_node, 0, NULL); return cm_node; } } exit: rcu_read_unlock(); /* no owner node */ return NULL; } /** * irdma_add_hte_node - add a cm node to the hash table * @cm_core: cm's core * @cm_node: connection's node */ static void irdma_add_hte_node(struct irdma_cm_core *cm_core, struct irdma_cm_node *cm_node) { unsigned long flags; u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; spin_lock_irqsave(&cm_core->ht_lock, flags); hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); spin_unlock_irqrestore(&cm_core->ht_lock, flags); } /** * irdma_ipv4_is_lpb - check if loopback * @loc_addr: local addr to compare * @rem_addr: remote address */ bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) { return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); } /** * irdma_ipv6_is_lpb - check if loopback * @loc_addr: local addr to compare * @rem_addr: remote address */ bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) { struct in6_addr raddr6; irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); } /** * irdma_cm_create_ah - create a cm address handle * @cm_node: The connection manager node to create AH for * @wait: Provides option to wait for ah creation or not */ static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) { struct irdma_ah_info ah_info = {}; struct irdma_device *iwdev = cm_node->iwdev; ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); ah_info.hop_ttl = 0x40; ah_info.tc_tos = cm_node->tos; ah_info.vsi = &iwdev->vsi; if (cm_node->ipv4) { ah_info.ipv4_valid = true; ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], ah_info.dest_ip_addr[0]); } else { memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, sizeof(ah_info.dest_ip_addr)); memcpy(ah_info.src_ip_addr, cm_node->loc_addr, sizeof(ah_info.src_ip_addr)); ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, ah_info.dest_ip_addr); } ah_info.vlan_tag = cm_node->vlan_id; if (cm_node->vlan_id < VLAN_N_VID) { ah_info.insert_vlan_tag = 1; ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; } ah_info.dst_arpindex = irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, &cm_node->ah)) return -ENOMEM; trace_irdma_create_ah(cm_node); return 0; } /** * irdma_cm_free_ah - free a cm address handle * @cm_node: The connection manager node to create AH for */ static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) { struct irdma_device *iwdev = cm_node->iwdev; trace_irdma_cm_free_ah(cm_node); irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); cm_node->ah = NULL; } /** * irdma_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 irdma_cm_node * irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, struct irdma_cm_info *cm_info, struct irdma_cm_listener *listener) { struct irdma_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 >= VLAN_N_VID && iwdev->dcb_vlan_mode) 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) ibdev_warn(&iwdev->ibdev, "application TOS[%d] and remote client TOS[%d] mismatch\n", listener->tos, cm_info->tos); if (iwdev->vsi.dscp_mode) { cm_node->user_pri = listener->user_pri; } else { cm_node->tos = max(listener->tos, cm_info->tos); cm_node->user_pri = rt_tos2priority(cm_node->tos); cm_node->user_pri = irdma_iw_get_vlan_prio(cm_info->loc_addr, cm_node->user_pri, cm_info->ipv4); } ibdev_dbg(&iwdev->ibdev, "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, cm_node->user_pri); trace_irdma_listener_tos(iwdev, 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 = IRDMA_CM_DEFAULT_MPA_VER; cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; cm_node->iwdev = iwdev; cm_node->dev = &iwdev->rf->sc_dev; cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 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; init_completion(&cm_node->establish_comp); refcount_set(&cm_node->refcnt, 1); /* associate our parent CM core */ cm_node->cm_core = cm_core; cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 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 - IRDMA_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 - IRDMA_MTU_TO_MSS_IPV6; } if ((cm_node->ipv4 && irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || (!cm_node->ipv4 && irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { cm_node->do_lpb = true; arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, cm_node->ipv4, NULL, IRDMA_ARP_RESOLVE); } else { oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, cm_node->ipv4, NULL, IRDMA_ARP_RESOLVE); if (cm_node->ipv4) arpindex = irdma_addr_resolve_neigh(iwdev, cm_info->loc_addr[0], cm_info->rem_addr[0], oldarpindex); else if (IS_ENABLED(CONFIG_IPV6)) arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, cm_info->loc_addr, cm_info->rem_addr, oldarpindex); else arpindex = -EINVAL; } if (arpindex < 0) goto err; ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); irdma_add_hte_node(cm_core, cm_node); cm_core->stats_nodes_created++; return cm_node; err: kfree(cm_node); return NULL; } static void irdma_destroy_connection(struct irdma_cm_node *cm_node) { struct irdma_cm_core *cm_core = cm_node->cm_core; struct irdma_qp *iwqp; struct irdma_cm_info nfo; /* if the node is destroyed before connection was accelerated */ if (!cm_node->accelerated && cm_node->accept_pend) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: node destroyed before established\n"); atomic_dec(&cm_node->listener->pend_accepts_cnt); } if (cm_node->close_entry) irdma_handle_close_entry(cm_node, 0); if (cm_node->listener) { irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); } else { if (cm_node->apbvt_set) { irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); cm_node->apbvt_set = 0; } irdma_get_addr_info(cm_node, &nfo); if (cm_node->qhash_set) { nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; irdma_manage_qhash(cm_node->iwdev, &nfo, IRDMA_QHASH_TYPE_TCP_ESTABLISHED, IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); cm_node->qhash_set = 0; } } iwqp = cm_node->iwqp; if (iwqp) { cm_node->cm_id->rem_ref(cm_node->cm_id); cm_node->cm_id = NULL; iwqp->cm_id = NULL; irdma_qp_rem_ref(&iwqp->ibqp); cm_node->iwqp = NULL; } else if (cm_node->qhash_set) { irdma_get_addr_info(cm_node, &nfo); nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; irdma_manage_qhash(cm_node->iwdev, &nfo, IRDMA_QHASH_TYPE_TCP_ESTABLISHED, IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); cm_node->qhash_set = 0; } cm_core->cm_free_ah(cm_node); } /** * irdma_rem_ref_cm_node - destroy an instance of a cm node * @cm_node: connection's node */ void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) { struct irdma_cm_core *cm_core = cm_node->cm_core; unsigned long flags; trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); spin_lock_irqsave(&cm_core->ht_lock, flags); if (!refcount_dec_and_test(&cm_node->refcnt)) { spin_unlock_irqrestore(&cm_core->ht_lock, flags); return; } if (cm_node->iwqp) { cm_node->iwqp->cm_node = NULL; cm_node->iwqp->cm_id = NULL; } hash_del_rcu(&cm_node->list); cm_node->cm_core->stats_nodes_destroyed++; spin_unlock_irqrestore(&cm_core->ht_lock, flags); irdma_destroy_connection(cm_node); kfree_rcu(cm_node, rcu_head); } /** * irdma_handle_fin_pkt - FIN packet received * @cm_node: connection's node */ static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) { switch (cm_node->state) { case IRDMA_CM_STATE_SYN_RCVD: case IRDMA_CM_STATE_SYN_SENT: case IRDMA_CM_STATE_ESTABLISHED: case IRDMA_CM_STATE_MPAREJ_RCVD: cm_node->tcp_cntxt.rcv_nxt++; irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_LAST_ACK; irdma_send_fin(cm_node); break; case IRDMA_CM_STATE_MPAREQ_SENT: irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); cm_node->tcp_cntxt.rcv_nxt++; irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSED; refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_FIN_WAIT1: cm_node->tcp_cntxt.rcv_nxt++; irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSING; irdma_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 IRDMA_CM_STATE_FIN_WAIT2: cm_node->tcp_cntxt.rcv_nxt++; irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_TIME_WAIT; irdma_send_ack(cm_node); irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 1, 0); break; case IRDMA_CM_STATE_TIME_WAIT: cm_node->tcp_cntxt.rcv_nxt++; irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_rem_ref_cm_node(cm_node); break; case IRDMA_CM_STATE_OFFLOADED: default: ibdev_dbg(&cm_node->iwdev->ibdev, "CM: bad state node state = %d\n", cm_node->state); break; } } /** * irdma_handle_rst_pkt - process received RST packet * @cm_node: connection's node * @rbuf: receive buffer */ static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", __builtin_return_address(0), cm_node, cm_node->state, cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); irdma_cleanup_retrans_entry(cm_node); switch (cm_node->state) { case IRDMA_CM_STATE_SYN_SENT: case IRDMA_CM_STATE_MPAREQ_SENT: switch (cm_node->mpa_frame_rev) { case IETF_MPA_V2: /* Drop down to MPA_V1*/ cm_node->mpa_frame_rev = IETF_MPA_V1; /* send a syn and goto syn sent state */ cm_node->state = IRDMA_CM_STATE_SYN_SENT; if (irdma_send_syn(cm_node, 0)) irdma_active_open_err(cm_node, false); break; case IETF_MPA_V1: default: irdma_active_open_err(cm_node, false); break; } break; case IRDMA_CM_STATE_MPAREQ_RCVD: atomic_inc(&cm_node->passive_state); break; case IRDMA_CM_STATE_ESTABLISHED: case IRDMA_CM_STATE_SYN_RCVD: case IRDMA_CM_STATE_LISTENING: irdma_passive_open_err(cm_node, false); break; case IRDMA_CM_STATE_OFFLOADED: irdma_active_open_err(cm_node, false); break; case IRDMA_CM_STATE_CLOSED: break; case IRDMA_CM_STATE_FIN_WAIT2: case IRDMA_CM_STATE_FIN_WAIT1: case IRDMA_CM_STATE_LAST_ACK: case IRDMA_CM_STATE_TIME_WAIT: cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_rem_ref_cm_node(cm_node); break; default: break; } } /** * irdma_handle_rcv_mpa - Process a recv'd mpa buffer * @cm_node: connection's node * @rbuf: receive buffer */ static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { int err; int datasize = rbuf->datalen; u8 *dataloc = rbuf->data; enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; u32 res_type; err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); if (err) { if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) irdma_active_open_err(cm_node, true); else irdma_passive_open_err(cm_node, true); return; } switch (cm_node->state) { case IRDMA_CM_STATE_ESTABLISHED: if (res_type == IRDMA_MPA_REQUEST_REJECT) ibdev_dbg(&cm_node->iwdev->ibdev, "CM: state for reject\n"); cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; type = IRDMA_CM_EVENT_MPA_REQ; irdma_send_ack(cm_node); /* ACK received MPA request */ atomic_set(&cm_node->passive_state, IRDMA_PASSIVE_STATE_INDICATED); break; case IRDMA_CM_STATE_MPAREQ_SENT: irdma_cleanup_retrans_entry(cm_node); if (res_type == IRDMA_MPA_REQUEST_REJECT) { type = IRDMA_CM_EVENT_MPA_REJECT; cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; } else { type = IRDMA_CM_EVENT_CONNECTED; cm_node->state = IRDMA_CM_STATE_OFFLOADED; } irdma_send_ack(cm_node); break; default: ibdev_dbg(&cm_node->iwdev->ibdev, "CM: wrong cm_node state =%d\n", cm_node->state); break; } irdma_create_event(cm_node, type); } /** * irdma_check_syn - Check for error on received syn ack * @cm_node: connection's node * @tcph: pointer tcp header */ static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) { if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { irdma_active_open_err(cm_node, true); return 1; } return 0; } /** * irdma_check_seq - check seq numbers if OK * @cm_node: connection's node * @tcph: pointer tcp header */ static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) { 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; int err = 0; seq = ntohl(tcph->seq); ack_seq = ntohl(tcph->ack_seq); rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; if (ack_seq != loc_seq_num || !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) err = -1; if (err) ibdev_dbg(&cm_node->iwdev->ibdev, "CM: seq number err\n"); return err; } void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) { struct irdma_cm_info nfo; irdma_get_addr_info(cm_node, &nfo); nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; irdma_manage_qhash(cm_node->iwdev, &nfo, IRDMA_QHASH_TYPE_TCP_ESTABLISHED, IRDMA_QHASH_MANAGE_TYPE_ADD, cm_node, false); cm_node->qhash_set = true; } /** * irdma_handle_syn_pkt - is for Passive node * @cm_node: connection's node * @rbuf: receive buffer */ static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; int err; u32 inc_sequence; int optionsize; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case IRDMA_CM_STATE_SYN_SENT: case IRDMA_CM_STATE_MPAREQ_SENT: /* Rcvd syn on active open connection */ irdma_active_open_err(cm_node, 1); break; case IRDMA_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++; irdma_passive_open_err(cm_node, false); break; } err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); if (err) { irdma_passive_open_err(cm_node, false); /* drop pkt */ break; } err = cm_node->cm_core->cm_create_ah(cm_node, false); if (err) { irdma_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 = IRDMA_CM_STATE_SYN_RCVD; break; case IRDMA_CM_STATE_CLOSED: irdma_cleanup_retrans_entry(cm_node); refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_OFFLOADED: case IRDMA_CM_STATE_ESTABLISHED: case IRDMA_CM_STATE_FIN_WAIT1: case IRDMA_CM_STATE_FIN_WAIT2: case IRDMA_CM_STATE_MPAREQ_RCVD: case IRDMA_CM_STATE_LAST_ACK: case IRDMA_CM_STATE_CLOSING: case IRDMA_CM_STATE_UNKNOWN: default: break; } } /** * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) * @cm_node: connection's node * @rbuf: receive buffer */ static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; int err; u32 inc_sequence; int optionsize; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case IRDMA_CM_STATE_SYN_SENT: irdma_cleanup_retrans_entry(cm_node); /* active open */ if (irdma_check_syn(cm_node, tcph)) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: check syn fail\n"); return; } cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); /* setup options */ err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); if (err) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p tcp_options failed\n", cm_node); break; } irdma_cleanup_retrans_entry(cm_node); cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; irdma_send_ack(cm_node); /* ACK for the syn_ack */ err = irdma_send_mpa_request(cm_node); if (err) { ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p irdma_send_mpa_request failed\n", cm_node); break; } cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; break; case IRDMA_CM_STATE_MPAREQ_RCVD: irdma_passive_open_err(cm_node, true); break; case IRDMA_CM_STATE_LISTENING: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_CLOSED: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); irdma_cleanup_retrans_entry(cm_node); refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_ESTABLISHED: case IRDMA_CM_STATE_FIN_WAIT1: case IRDMA_CM_STATE_FIN_WAIT2: case IRDMA_CM_STATE_LAST_ACK: case IRDMA_CM_STATE_OFFLOADED: case IRDMA_CM_STATE_CLOSING: case IRDMA_CM_STATE_UNKNOWN: case IRDMA_CM_STATE_MPAREQ_SENT: default: break; } } /** * irdma_handle_ack_pkt - process packet with ACK * @cm_node: connection's node * @rbuf: receive buffer */ static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; u32 inc_sequence; int ret; int optionsize; u32 datasize = rbuf->datalen; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); if (irdma_check_seq(cm_node, tcph)) return -EINVAL; inc_sequence = ntohl(tcph->seq); switch (cm_node->state) { case IRDMA_CM_STATE_SYN_RCVD: irdma_cleanup_retrans_entry(cm_node); ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); if (ret) return ret; cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); cm_node->state = IRDMA_CM_STATE_ESTABLISHED; if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; irdma_handle_rcv_mpa(cm_node, rbuf); } break; case IRDMA_CM_STATE_ESTABLISHED: irdma_cleanup_retrans_entry(cm_node); if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; irdma_handle_rcv_mpa(cm_node, rbuf); } break; case IRDMA_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; irdma_handle_rcv_mpa(cm_node, rbuf); } else { cm_node->ack_rcvd = true; } break; case IRDMA_CM_STATE_LISTENING: irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_CLOSED: irdma_cleanup_retrans_entry(cm_node); refcount_inc(&cm_node->refcnt); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_LAST_ACK: case IRDMA_CM_STATE_CLOSING: irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_rem_ref_cm_node(cm_node); break; case IRDMA_CM_STATE_FIN_WAIT1: irdma_cleanup_retrans_entry(cm_node); cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; break; case IRDMA_CM_STATE_SYN_SENT: case IRDMA_CM_STATE_FIN_WAIT2: case IRDMA_CM_STATE_OFFLOADED: case IRDMA_CM_STATE_MPAREQ_RCVD: case IRDMA_CM_STATE_UNKNOWN: default: irdma_cleanup_retrans_entry(cm_node); break; } return 0; } /** * irdma_process_pkt - process cm packet * @cm_node: connection's node * @rbuf: receive buffer */ static void irdma_process_pkt(struct irdma_cm_node *cm_node, struct irdma_puda_buf *rbuf) { enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; u32 fin_set = 0; int err; if (tcph->rst) { pkt_type = IRDMA_PKT_TYPE_RST; } else if (tcph->syn) { pkt_type = IRDMA_PKT_TYPE_SYN; if (tcph->ack) pkt_type = IRDMA_PKT_TYPE_SYNACK; } else if (tcph->ack) { pkt_type = IRDMA_PKT_TYPE_ACK; } if (tcph->fin) fin_set = 1; switch (pkt_type) { case IRDMA_PKT_TYPE_SYN: irdma_handle_syn_pkt(cm_node, rbuf); break; case IRDMA_PKT_TYPE_SYNACK: irdma_handle_synack_pkt(cm_node, rbuf); break; case IRDMA_PKT_TYPE_ACK: err = irdma_handle_ack_pkt(cm_node, rbuf); if (fin_set && !err) irdma_handle_fin_pkt(cm_node); break; case IRDMA_PKT_TYPE_RST: irdma_handle_rst_pkt(cm_node, rbuf); break; default: if (fin_set && (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) irdma_handle_fin_pkt(cm_node); break; } } /** * irdma_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 irdma_cm_listener * irdma_make_listen_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, struct irdma_cm_info *cm_info) { struct irdma_cm_listener *listener; unsigned long flags; /* cannot have multiple matching listeners */ listener = irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, cm_info->loc_port, cm_info->vlan_id, IRDMA_CM_LISTENER_EITHER_STATE); if (listener && listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { refcount_dec(&listener->refcnt); 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); refcount_set(&listener->refcnt, 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 = IRDMA_CM_LISTENER_ACTIVE_STATE; if (!listener->reused_node) { spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_add(&listener->list, &cm_core->listen_list); spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); } return listener; } /** * irdma_create_cm_node - make a connection node with params * @cm_core: cm's core * @iwdev: iwarp device structure * @conn_param: connection parameters * @cm_info: quad info for connection * @caller_cm_node: pointer to cm_node structure to return */ static int irdma_create_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, struct iw_cm_conn_param *conn_param, struct irdma_cm_info *cm_info, struct irdma_cm_node **caller_cm_node) { struct irdma_cm_node *cm_node; u16 private_data_len = conn_param->private_data_len; const void *private_data = conn_param->private_data; /* create a CM connection node */ cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); if (!cm_node) return -ENOMEM; /* set our node side to client (active) side */ cm_node->tcp_cntxt.client = 1; cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 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); *caller_cm_node = cm_node; return 0; } /** * irdma_cm_reject - reject and teardown a connection * @cm_node: connection's node * @pdata: ptr to private data for reject * @plen: size of private data */ static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, u8 plen) { int ret; int passive_state; if (cm_node->tcp_cntxt.client) return 0; irdma_cleanup_retrans_entry(cm_node); passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == IRDMA_SEND_RESET_EVENT) { cm_node->state = IRDMA_CM_STATE_CLOSED; irdma_rem_ref_cm_node(cm_node); return 0; } if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { irdma_rem_ref_cm_node(cm_node); return 0; } ret = irdma_send_mpa_reject(cm_node, pdata, plen); if (!ret) return 0; cm_node->state = IRDMA_CM_STATE_CLOSED; if (irdma_send_reset(cm_node)) ibdev_dbg(&cm_node->iwdev->ibdev, "CM: send reset failed\n"); return ret; } /** * irdma_cm_close - close of cm connection * @cm_node: connection's node */ static int irdma_cm_close(struct irdma_cm_node *cm_node) { switch (cm_node->state) { case IRDMA_CM_STATE_SYN_RCVD: case IRDMA_CM_STATE_SYN_SENT: case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: case IRDMA_CM_STATE_ESTABLISHED: case IRDMA_CM_STATE_ACCEPTING: case IRDMA_CM_STATE_MPAREQ_SENT: case IRDMA_CM_STATE_MPAREQ_RCVD: irdma_cleanup_retrans_entry(cm_node); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_CLOSE_WAIT: cm_node->state = IRDMA_CM_STATE_LAST_ACK; irdma_send_fin(cm_node); break; case IRDMA_CM_STATE_FIN_WAIT1: case IRDMA_CM_STATE_FIN_WAIT2: case IRDMA_CM_STATE_LAST_ACK: case IRDMA_CM_STATE_TIME_WAIT: case IRDMA_CM_STATE_CLOSING: return -EINVAL; case IRDMA_CM_STATE_LISTENING: irdma_cleanup_retrans_entry(cm_node); irdma_send_reset(cm_node); break; case IRDMA_CM_STATE_MPAREJ_RCVD: case IRDMA_CM_STATE_UNKNOWN: case IRDMA_CM_STATE_INITED: case IRDMA_CM_STATE_CLOSED: case IRDMA_CM_STATE_LISTENER_DESTROYED: irdma_rem_ref_cm_node(cm_node); break; case IRDMA_CM_STATE_OFFLOADED: if (cm_node->send_entry) ibdev_dbg(&cm_node->iwdev->ibdev, "CM: CM send_entry in OFFLOADED state\n"); irdma_rem_ref_cm_node(cm_node); break; } return 0; } /** * irdma_receive_ilq - recv an ETHERNET packet, and process it * through CM * @vsi: VSI structure of dev * @rbuf: receive buffer */ void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) { struct irdma_cm_node *cm_node; struct irdma_cm_listener *listener; struct iphdr *iph; struct ipv6hdr *ip6h; struct tcphdr *tcph; struct irdma_cm_info cm_info = {}; struct irdma_device *iwdev = vsi->back_vsi; struct irdma_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; print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 16, 8, rbuf->mem.va, rbuf->totallen, false); if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { if (rbuf->vlan_valid) { vtag = rbuf->vlan_id; cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; cm_info.vlan_id = vtag & VLAN_VID_MASK; } else { cm_info.vlan_id = 0xFFFF; } } else { ethh = 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; ibdev_dbg(&cm_core->iwdev->ibdev, "CM: vlan_id=%d\n", cm_info.vlan_id); } else { cm_info.vlan_id = 0xFFFF; } } 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; irdma_copy_ip_ntohl(cm_info.loc_addr, ip6h->daddr.in6_u.u6_addr32); irdma_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 = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); if (!cm_node) { /* Only type of packet accepted are for the * PASSIVE open (syn only) */ if (!tcph->syn || tcph->ack) return; listener = irdma_find_listener(cm_core, cm_info.loc_addr, cm_info.ipv4, cm_info.loc_port, cm_info.vlan_id, IRDMA_CM_LISTENER_ACTIVE_STATE); if (!listener) { cm_info.cm_id = NULL; ibdev_dbg(&cm_core->iwdev->ibdev, "CM: no listener found\n"); return; } cm_info.cm_id = listener->cm_id; cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, listener); if (!cm_node) { ibdev_dbg(&cm_core->iwdev->ibdev, "CM: allocate node failed\n"); refcount_dec(&listener->refcnt); return; } if (!tcph->rst && !tcph->fin) { cm_node->state = IRDMA_CM_STATE_LISTENING; } else { irdma_rem_ref_cm_node(cm_node); return; } refcount_inc(&cm_node->refcnt); } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { irdma_rem_ref_cm_node(cm_node); return; } irdma_process_pkt(cm_node, rbuf); irdma_rem_ref_cm_node(cm_node); } static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) { if (!active) irdma_add_conn_est_qh(cm_node); return 0; } static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) { } /** * irdma_setup_cm_core - setup top level instance of a cm core * @iwdev: iwarp device structure * @rdma_ver: HW version */ int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) { struct irdma_cm_core *cm_core = &iwdev->cm_core; cm_core->iwdev = iwdev; cm_core->dev = &iwdev->rf->sc_dev; /* Handles CM event work items send to Iwarp core */ cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); if (!cm_core->event_wq) return -ENOMEM; INIT_LIST_HEAD(&cm_core->listen_list); timer_setup(&cm_core->tcp_timer, irdma_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); switch (rdma_ver) { case IRDMA_GEN_1: cm_core->form_cm_frame = irdma_form_uda_cm_frame; cm_core->cm_create_ah = irdma_add_qh; cm_core->cm_free_ah = irdma_cm_free_ah_nop; break; case IRDMA_GEN_2: default: cm_core->form_cm_frame = irdma_form_ah_cm_frame; cm_core->cm_create_ah = irdma_cm_create_ah; cm_core->cm_free_ah = irdma_cm_free_ah; } return 0; } /** * irdma_cleanup_cm_core - deallocate a top level instance of a * cm core * @cm_core: cm's core */ void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) { if (!cm_core) return; del_timer_sync(&cm_core->tcp_timer); destroy_workqueue(cm_core->event_wq); cm_core->dev->ws_reset(&cm_core->iwdev->vsi); } /** * irdma_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 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, struct irdma_tcp_offload_info *tcp_info, struct irdma_qp *iwqp) { tcp_info->ipv4 = cm_node->ipv4; tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 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 = IRDMA_DEFAULT_TTL; tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; tcp_info->tcp_state = IRDMA_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 = cm_node->tcp_cntxt.loc_seq_num; tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd << cm_node->tcp_cntxt.rcv_wscale; tcp_info->flow_label = 0; tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; tcp_info->tos = cm_node->tos; if (cm_node->vlan_id < VLAN_N_VID) { tcp_info->insert_vlan_tag = true; tcp_info->vlan_tag = cm_node->vlan_id; tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; } if (cm_node->ipv4) { tcp_info->src_port = cm_node->loc_port; tcp_info->dst_port = cm_node->rem_port; tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, &tcp_info->dest_ip_addr[3], true, NULL, IRDMA_ARP_RESOLVE); } else { tcp_info->src_port = cm_node->loc_port; tcp_info->dst_port = cm_node->rem_port; memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, sizeof(tcp_info->dest_ip_addr)); memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, sizeof(tcp_info->local_ipaddr)); tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, &tcp_info->dest_ip_addr[0], false, NULL, IRDMA_ARP_RESOLVE); } } /** * irdma_cm_init_tsa_conn - setup qp for RTS * @iwqp: associate qp for the connection * @cm_node: connection's node */ static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, struct irdma_cm_node *cm_node) { struct irdma_iwarp_offload_info *iwarp_info; struct irdma_qp_host_ctx_info *ctx_info; iwarp_info = &iwqp->iwarp_info; ctx_info = &iwqp->ctx_info; ctx_info->tcp_info = &iwqp->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 = cm_node->ird_size; iwarp_info->rd_en = 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->user_pri = cm_node->user_pri; irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); if (cm_node->snd_mark_en) { iwarp_info->snd_mark_en = true; iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + cm_node->lsmm_size; } cm_node->state = IRDMA_CM_STATE_OFFLOADED; iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; if (cm_node->rcv_mark_en) { iwarp_info->rcv_mark_en = true; iwarp_info->align_hdrs = true; } irdma_sc_qp_setctx(&iwqp->sc_qp, 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; } /** * irdma_cm_disconn - when a connection is being closed * @iwqp: associated qp for the connection */ void irdma_cm_disconn(struct irdma_qp *iwqp) { struct irdma_device *iwdev = iwqp->iwdev; struct disconn_work *work; unsigned long flags; work = kzalloc(sizeof(*work), GFP_ATOMIC); if (!work) return; spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); ibdev_dbg(&iwdev->ibdev, "CM: qp_id %d is already freed\n", iwqp->ibqp.qp_num); kfree(work); return; } irdma_qp_add_ref(&iwqp->ibqp); spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); work->iwqp = iwqp; INIT_WORK(&work->work, irdma_disconnect_worker); queue_work(iwdev->cleanup_wq, &work->work); } /** * irdma_qp_disconnect - free qp and close cm * @iwqp: associate qp for the connection */ static void irdma_qp_disconnect(struct irdma_qp *iwqp) { struct irdma_device *iwdev = iwqp->iwdev; iwqp->active_conn = 0; /* close the CM node down if it is still active */ ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); irdma_cm_close(iwqp->cm_node); } /** * irdma_cm_disconn_true - called by worker thread to disconnect qp * @iwqp: associate qp for the connection */ static void irdma_cm_disconn_true(struct irdma_qp *iwqp) { struct iw_cm_id *cm_id; struct irdma_device *iwdev; struct irdma_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; unsigned long flags; int err; iwdev = iwqp->iwdev; spin_lock_irqsave(&iwqp->lock, flags); if (rdma_protocol_roce(&iwdev->ibdev, 1)) { struct ib_qp_attr attr; if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { spin_unlock_irqrestore(&iwqp->lock, flags); return; } spin_unlock_irqrestore(&iwqp->lock, flags); attr.qp_state = IB_QPS_ERR; irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); irdma_ib_qp_event(iwqp, qp->event_type); return; } cm_id = iwqp->cm_id; 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; irdma_terminate_del_timer(qp); if (!iwqp->flush_issued) { iwqp->flush_issued = 1; issue_flush = 1; } } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || ((original_ibqp_state == IB_QPS_RTS) && (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { issue_disconn = 1; if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) disconn_status = -ECONNRESET; } if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || last_ae == IRDMA_AE_BAD_CLOSE || last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { issue_close = 1; iwqp->cm_id = NULL; qp->term_flags = 0; if (!iwqp->flush_issued) { iwqp->flush_issued = 1; issue_flush = 1; } } spin_unlock_irqrestore(&iwqp->lock, flags); if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | IRDMA_FLUSH_WAIT); if (qp->term_flags) irdma_ib_qp_event(iwqp, qp->event_type); } if (!cm_id || !cm_id->event_handler) return; spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); if (!iwqp->cm_node) { spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); return; } refcount_inc(&iwqp->cm_node->refcnt); spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); if (issue_disconn) { err = irdma_send_cm_event(iwqp->cm_node, cm_id, IW_CM_EVENT_DISCONNECT, disconn_status); if (err) ibdev_dbg(&iwdev->ibdev, "CM: disconnect event failed: - cm_id = %p\n", cm_id); } if (issue_close) { cm_id->provider_data = iwqp; err = irdma_send_cm_event(iwqp->cm_node, cm_id, IW_CM_EVENT_CLOSE, 0); if (err) ibdev_dbg(&iwdev->ibdev, "CM: close event failed: - cm_id = %p\n", cm_id); irdma_qp_disconnect(iwqp); } irdma_rem_ref_cm_node(iwqp->cm_node); } /** * irdma_disconnect_worker - worker for connection close * @work: points or disconn structure */ static void irdma_disconnect_worker(struct work_struct *work) { struct disconn_work *dwork = container_of(work, struct disconn_work, work); struct irdma_qp *iwqp = dwork->iwqp; kfree(dwork); irdma_cm_disconn_true(iwqp); irdma_qp_rem_ref(&iwqp->ibqp); } /** * irdma_free_lsmm_rsrc - free lsmm memory and deregister * @iwqp: associate qp for the connection */ void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) { struct irdma_device *iwdev; iwdev = iwqp->iwdev; if (iwqp->ietf_mem.va) { if (iwqp->lsmm_mr) iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); dma_free_coherent(iwdev->rf->sc_dev.hw->device, iwqp->ietf_mem.size, iwqp->ietf_mem.va, iwqp->ietf_mem.pa); iwqp->ietf_mem.va = NULL; } } /** * irdma_accept - registered call for connection to be accepted * @cm_id: cm information for passive connection * @conn_param: accpet parameters */ int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) { struct ib_qp *ibqp; struct irdma_qp *iwqp; struct irdma_device *iwdev; struct irdma_sc_dev *dev; struct irdma_cm_node *cm_node; struct ib_qp_attr attr = {}; int passive_state; struct ib_mr *ibmr; struct irdma_pd *iwpd; u16 buf_len = 0; struct irdma_kmem_info accept; u64 tagged_offset; int wait_ret; int ret = 0; ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); if (!ibqp) return -EINVAL; iwqp = to_iwqp(ibqp); iwdev = iwqp->iwdev; dev = &iwdev->rf->sc_dev; 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 = irdma_get_vlan_ipv4(cm_node->loc_addr); } else { cm_node->ipv4 = false; irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL); } ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", cm_node->vlan_id); trace_irdma_accept(cm_node, 0, NULL); if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { ret = -EINVAL; goto error; } passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == IRDMA_SEND_RESET_EVENT) { ret = -ECONNRESET; goto error; } buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; iwqp->ietf_mem.size = ALIGN(buf_len, 1); iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, iwqp->ietf_mem.size, &iwqp->ietf_mem.pa, GFP_KERNEL); if (!iwqp->ietf_mem.va) { ret = -ENOMEM; goto error; } cm_node->pdata.size = conn_param->private_data_len; accept.addr = iwqp->ietf_mem.va; accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, conn_param->private_data_len); if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { ret = -ENOMEM; goto error; } iwqp->sc_qp.user_pri = cm_node->user_pri; irdma_qp_add_qos(&iwqp->sc_qp); /* setup our first outgoing iWarp send WQE (the IETF frame response) */ iwpd = iwqp->iwpd; tagged_offset = (uintptr_t)iwqp->ietf_mem.va; ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, IB_ACCESS_LOCAL_WRITE, &tagged_offset); if (IS_ERR(ibmr)) { ret = -ENOMEM; goto error; } ibmr->pd = &iwpd->ibpd; ibmr->device = iwpd->ibpd.device; iwqp->lsmm_mr = ibmr; if (iwqp->page) iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); cm_node->lsmm_size = accept.size + conn_param->private_data_len; irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, ibmr->lkey); if (iwqp->page) kunmap_local(iwqp->sc_qp.qp_uk.sq_base); iwqp->cm_id = cm_id; cm_node->cm_id = cm_id; cm_id->provider_data = iwqp; iwqp->active_conn = 0; iwqp->cm_node = cm_node; cm_node->iwqp = iwqp; irdma_cm_init_tsa_conn(iwqp, cm_node); irdma_qp_add_ref(&iwqp->ibqp); cm_id->add_ref(cm_id); attr.qp_state = IB_QPS_RTS; cm_node->qhash_set = false; cm_node->cm_core->cm_free_ah(cm_node); irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { wait_ret = wait_event_interruptible_timeout(iwqp->waitq, iwqp->rts_ae_rcvd, IRDMA_MAX_TIMEOUT); if (!wait_ret) { ibdev_dbg(&iwdev->ibdev, "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", cm_node, cm_node->loc_port, cm_node->rem_port, cm_node->cm_id); ret = -ECONNRESET; goto error; } } irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); cm_node->accelerated = true; complete(&cm_node->establish_comp); if (cm_node->accept_pend) { atomic_dec(&cm_node->listener->pend_accepts_cnt); cm_node->accept_pend = 0; } ibdev_dbg(&iwdev->ibdev, "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n", cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); cm_node->cm_core->stats_accepts++; return 0; error: irdma_free_lsmm_rsrc(iwqp); irdma_rem_ref_cm_node(cm_node); return ret; } /** * irdma_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 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) { struct irdma_device *iwdev; struct irdma_cm_node *cm_node; cm_node = cm_id->provider_data; cm_node->pdata.size = pdata_len; trace_irdma_reject(cm_node, 0, NULL); iwdev = to_iwdev(cm_id->device); if (!iwdev) return -EINVAL; cm_node->cm_core->stats_rejects++; if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) return -EINVAL; return irdma_cm_reject(cm_node, pdata, pdata_len); } /** * irdma_connect - registered call for connection to be established * @cm_id: cm information for passive connection * @conn_param: Information about the connection */ int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) { struct ib_qp *ibqp; struct irdma_qp *iwqp; struct irdma_device *iwdev; struct irdma_cm_node *cm_node; struct irdma_cm_info cm_info; struct sockaddr_in *laddr; struct sockaddr_in *raddr; struct sockaddr_in6 *laddr6; struct sockaddr_in6 *raddr6; int ret = 0; ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); if (!ibqp) return -EINVAL; iwqp = to_iwqp(ibqp); if (!iwqp) return -EINVAL; iwdev = iwqp->iwdev; 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) { if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) return -EINVAL; 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 = irdma_get_vlan_ipv4(cm_info.loc_addr); } else { if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) return -EINVAL; cm_info.ipv4 = false; irdma_copy_ip_ntohl(cm_info.loc_addr, laddr6->sin6_addr.in6_u.u6_addr32); irdma_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); irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); } cm_info.cm_id = cm_id; cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; cm_info.tos = cm_id->tos; if (iwdev->vsi.dscp_mode) { cm_info.user_pri = iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; } else { cm_info.user_pri = rt_tos2priority(cm_id->tos); cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr, cm_info.user_pri, cm_info.ipv4); } if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) return -ENOMEM; iwqp->sc_qp.user_pri = cm_info.user_pri; irdma_qp_add_qos(&iwqp->sc_qp); ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, cm_info.user_pri); trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, &cm_node); if (ret) return ret; ret = cm_node->cm_core->cm_create_ah(cm_node, true); if (ret) goto err; if (irdma_manage_qhash(iwdev, &cm_info, IRDMA_QHASH_TYPE_TCP_ESTABLISHED, IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { ret = -EINVAL; goto err; } cm_node->qhash_set = true; cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); if (!cm_node->apbvt_entry) { ret = -EINVAL; goto err; } cm_node->apbvt_set = true; iwqp->cm_node = cm_node; cm_node->iwqp = iwqp; iwqp->cm_id = cm_id; irdma_qp_add_ref(&iwqp->ibqp); cm_id->add_ref(cm_id); if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { cm_node->state = IRDMA_CM_STATE_SYN_SENT; ret = irdma_send_syn(cm_node, 0); if (ret) goto err; } ibdev_dbg(&iwdev->ibdev, "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n", cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); trace_irdma_connect(cm_node, 0, NULL); return 0; err: if (cm_info.ipv4) ibdev_dbg(&iwdev->ibdev, "CM: connect() FAILED: dest addr=%pI4", cm_info.rem_addr); else ibdev_dbg(&iwdev->ibdev, "CM: connect() FAILED: dest addr=%pI6", cm_info.rem_addr); irdma_rem_ref_cm_node(cm_node); iwdev->cm_core.stats_connect_errs++; return ret; } /** * irdma_create_listen - registered call creating listener * @cm_id: cm information for passive connection * @backlog: to max accept pending count */ int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) { struct irdma_device *iwdev; struct irdma_cm_listener *cm_listen_node; struct irdma_cm_info cm_info = {}; struct sockaddr_in *laddr; struct sockaddr_in6 *laddr6; bool wildcard = false; int err; 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; cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; if (laddr->sin_family == AF_INET) { if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) return -EINVAL; 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 != htonl(INADDR_ANY)) { cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); } else { cm_info.vlan_id = 0xFFFF; wildcard = true; } } else { if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) return -EINVAL; cm_info.ipv4 = false; irdma_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) { irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); } else { cm_info.vlan_id = 0xFFFF; wildcard = true; } } if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) cm_info.vlan_id = 0; cm_info.backlog = backlog; cm_info.cm_id = cm_id; trace_irdma_create_listen(iwdev, &cm_info); cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); if (!cm_listen_node) { ibdev_dbg(&iwdev->ibdev, "CM: cm_listen_node == NULL\n"); return -ENOMEM; } cm_id->provider_data = cm_listen_node; cm_listen_node->tos = cm_id->tos; if (iwdev->vsi.dscp_mode) cm_listen_node->user_pri = iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; else 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) { err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); if (err) goto error; } else { if (!iwdev->vsi.dscp_mode) cm_listen_node->user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr, cm_info.user_pri, cm_info.ipv4); cm_info.user_pri = cm_listen_node->user_pri; err = irdma_manage_qhash(iwdev, &cm_info, IRDMA_QHASH_TYPE_TCP_SYN, IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true); if (err) goto error; cm_listen_node->qhash_set = true; } cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); if (!cm_listen_node->apbvt_entry) goto error; } cm_id->add_ref(cm_id); cm_listen_node->cm_core->stats_listen_created++; ibdev_dbg(&iwdev->ibdev, "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", cm_listen_node->loc_port, cm_listen_node->loc_addr, cm_listen_node, cm_listen_node->cm_id, cm_listen_node->qhash_set, cm_listen_node->vlan_id); return 0; error: irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); return -EINVAL; } /** * irdma_destroy_listen - registered call to destroy listener * @cm_id: cm information for passive connection */ int irdma_destroy_listen(struct iw_cm_id *cm_id) { struct irdma_device *iwdev; iwdev = to_iwdev(cm_id->device); if (cm_id->provider_data) irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); else ibdev_dbg(&iwdev->ibdev, "CM: cm_id->provider_data was NULL\n"); cm_id->rem_ref(cm_id); return 0; } /** * irdma_teardown_list_prep - add conn nodes slated for tear down to list * @cm_core: cm's core * @teardown_list: a list to which cm_node will be selected * @ipaddr: pointer to ip address * @nfo: pointer to cm_info structure instance * @disconnect_all: flag indicating disconnect all QPs */ static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, struct list_head *teardown_list, u32 *ipaddr, struct irdma_cm_info *nfo, bool disconnect_all) { struct irdma_cm_node *cm_node; int bkt; hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { if ((disconnect_all || (nfo->vlan_id == cm_node->vlan_id && !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && refcount_inc_not_zero(&cm_node->refcnt)) list_add(&cm_node->teardown_entry, teardown_list); } } /** * irdma_cm_event_connected - handle connected active node * @event: the info for cm_node of connection */ static void irdma_cm_event_connected(struct irdma_cm_event *event) { struct irdma_qp *iwqp; struct irdma_device *iwdev; struct irdma_cm_node *cm_node; struct irdma_sc_dev *dev; struct ib_qp_attr attr = {}; struct iw_cm_id *cm_id; int status; bool read0; int wait_ret = 0; cm_node = event->cm_node; cm_id = cm_node->cm_id; iwqp = cm_id->provider_data; iwdev = iwqp->iwdev; dev = &iwdev->rf->sc_dev; if (iwqp->sc_qp.qp_uk.destroy_pending) { status = -ETIMEDOUT; goto error; } irdma_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_local_page(iwqp->page); irdma_sc_send_rtt(&iwqp->sc_qp, read0); if (iwqp->page) kunmap_local(iwqp->sc_qp.qp_uk.sq_base); attr.qp_state = IB_QPS_RTS; cm_node->qhash_set = false; irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { wait_ret = wait_event_interruptible_timeout(iwqp->waitq, iwqp->rts_ae_rcvd, IRDMA_MAX_TIMEOUT); if (!wait_ret) ibdev_dbg(&iwdev->ibdev, "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", cm_node, cm_node->loc_port, cm_node->rem_port, cm_node->cm_id); } irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); cm_node->accelerated = true; complete(&cm_node->establish_comp); cm_node->cm_core->cm_free_ah(cm_node); return; error: iwqp->cm_id = NULL; cm_id->provider_data = NULL; irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, status); irdma_rem_ref_cm_node(event->cm_node); } /** * irdma_cm_event_reset - handle reset * @event: the info for cm_node of connection */ static void irdma_cm_event_reset(struct irdma_cm_event *event) { struct irdma_cm_node *cm_node = event->cm_node; struct iw_cm_id *cm_id = cm_node->cm_id; struct irdma_qp *iwqp; if (!cm_id) return; iwqp = cm_id->provider_data; if (!iwqp) return; ibdev_dbg(&cm_node->iwdev->ibdev, "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); iwqp->cm_id = NULL; irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); } /** * irdma_cm_event_handler - send event to cm upper layer * @work: pointer of cm event info. */ static void irdma_cm_event_handler(struct work_struct *work) { struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); struct irdma_cm_node *cm_node; if (!event || !event->cm_node || !event->cm_node->cm_core) return; cm_node = event->cm_node; trace_irdma_cm_event_handler(cm_node, event->type, NULL); switch (event->type) { case IRDMA_CM_EVENT_MPA_REQ: irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CONNECT_REQUEST, 0); break; case IRDMA_CM_EVENT_RESET: irdma_cm_event_reset(event); break; case IRDMA_CM_EVENT_CONNECTED: if (!event->cm_node->cm_id || event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) break; irdma_cm_event_connected(event); break; case IRDMA_CM_EVENT_MPA_REJECT: if (!event->cm_node->cm_id || cm_node->state == IRDMA_CM_STATE_OFFLOADED) break; irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); break; case IRDMA_CM_EVENT_ABORTED: if (!event->cm_node->cm_id || event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) break; irdma_event_connect_error(event); break; default: ibdev_dbg(&cm_node->iwdev->ibdev, "CM: bad event type = %d\n", event->type); break; } irdma_rem_ref_cm_node(event->cm_node); kfree(event); } /** * irdma_cm_post_event - queue event request for worker thread * @event: cm node's info for up event call */ static void irdma_cm_post_event(struct irdma_cm_event *event) { refcount_inc(&event->cm_node->refcnt); INIT_WORK(&event->event_work, irdma_cm_event_handler); queue_work(event->cm_node->cm_core->event_wq, &event->event_work); } /** * irdma_cm_teardown_connections - teardown QPs * @iwdev: device pointer * @ipaddr: Pointer to IPv4 or IPv6 address * @nfo: Connection info * @disconnect_all: flag indicating disconnect all QPs * * teardown QPs where source or destination addr matches ip addr */ void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, struct irdma_cm_info *nfo, bool disconnect_all) { struct irdma_cm_core *cm_core = &iwdev->cm_core; struct list_head *list_core_temp; struct list_head *list_node; struct irdma_cm_node *cm_node; struct list_head teardown_list; struct ib_qp_attr attr; INIT_LIST_HEAD(&teardown_list); rcu_read_lock(); irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); rcu_read_unlock(); list_for_each_safe (list_node, list_core_temp, &teardown_list) { cm_node = container_of(list_node, struct irdma_cm_node, teardown_entry); attr.qp_state = IB_QPS_ERR; irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); if (iwdev->rf->reset) irdma_cm_disconn(cm_node->iwqp); irdma_rem_ref_cm_node(cm_node); } } /** * irdma_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 irdma_qhash_ctrl(struct irdma_device *iwdev, struct irdma_cm_listener *parent_listen_node, struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, bool ifup) { struct list_head *child_listen_list = &parent_listen_node->child_listen_list; struct irdma_cm_listener *child_listen_node; struct list_head *pos, *tpos; bool node_allocated = false; enum irdma_quad_hash_manage_type op = ifup ? IRDMA_QHASH_MANAGE_TYPE_ADD : IRDMA_QHASH_MANAGE_TYPE_DELETE; int err; list_for_each_safe (pos, tpos, child_listen_list) { child_listen_node = list_entry(pos, struct irdma_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 = kmemdup(parent_listen_node, sizeof(*child_listen_node), GFP_ATOMIC); if (!child_listen_node) return; node_allocated = true; 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; err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, false); if (!err) { 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); } } /** * irdma_if_notify - process an ifdown on an interface * @iwdev: device pointer * @netdev: network device structure * @ipaddr: Pointer to IPv4 or IPv6 address * @ipv4: flag indicating IPv4 when true * @ifup: flag indicating interface up when true */ void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, u32 *ipaddr, bool ipv4, bool ifup) { struct irdma_cm_core *cm_core = &iwdev->cm_core; unsigned long flags; struct irdma_cm_listener *listen_node; static const u32 ip_zero[4] = { 0, 0, 0, 0 }; struct irdma_cm_info nfo = {}; u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); enum irdma_quad_hash_manage_type op = ifup ? IRDMA_QHASH_MANAGE_TYPE_ADD : IRDMA_QHASH_MANAGE_TYPE_DELETE; nfo.vlan_id = vlan_id; nfo.ipv4 = ipv4; nfo.qh_qpid = 1; /* Disable or enable qhash for listeners */ spin_lock_irqsave(&cm_core->listen_list_lock, flags); list_for_each_entry (listen_node, &cm_core->listen_list, 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))) continue; 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)) { irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, ifup); } else if (memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)) { if (!irdma_manage_qhash(iwdev, &nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, false)) listen_node->qhash_set = ifup; } } spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); /* disconnect any connected qp's on ifdown */ if (!ifup) irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1