| /******************************************************************************* |
| * |
| * Copyright (c) 2015-2016 Intel Corporation. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenFabrics.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| *******************************************************************************/ |
| |
| #include <linux/atomic.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <linux/init.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_vlan.h> |
| #include <linux/notifier.h> |
| #include <linux/net.h> |
| #include <linux/types.h> |
| #include <linux/timer.h> |
| #include <linux/time.h> |
| #include <linux/delay.h> |
| #include <linux/etherdevice.h> |
| #include <linux/netdevice.h> |
| #include <linux/random.h> |
| #include <linux/list.h> |
| #include <linux/threads.h> |
| #include <linux/highmem.h> |
| #include <net/arp.h> |
| #include <net/ndisc.h> |
| #include <net/neighbour.h> |
| #include <net/route.h> |
| #include <net/addrconf.h> |
| #include <net/ip6_route.h> |
| #include <net/ip_fib.h> |
| #include <net/tcp.h> |
| #include <asm/checksum.h> |
| |
| #include "i40iw.h" |
| |
| static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); |
| static void i40iw_cm_post_event(struct i40iw_cm_event *event); |
| static void i40iw_disconnect_worker(struct work_struct *work); |
| |
| /** |
| * i40iw_free_sqbuf - put back puda buffer if refcount = 0 |
| * @dev: FPK device |
| * @buf: puda buffer to free |
| */ |
| void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp) |
| { |
| struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; |
| struct i40iw_puda_rsrc *ilq = dev->ilq; |
| |
| if (!atomic_dec_return(&buf->refcount)) |
| i40iw_puda_ret_bufpool(ilq, buf); |
| } |
| |
| /** |
| * i40iw_derive_hw_ird_setting - Calculate IRD |
| * |
| * @cm_ird: IRD of connection's node |
| * |
| * The ird from the connection is rounded to a supported HW |
| * setting (2,8,32,64) and then encoded for ird_size field of |
| * qp_ctx |
| */ |
| static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) |
| { |
| u8 encoded_ird_size; |
| u8 pof2_cm_ird = 1; |
| |
| /* round-off to next powerof2 */ |
| while (pof2_cm_ird < cm_ird) |
| pof2_cm_ird *= 2; |
| |
| /* ird_size field is encoded in qp_ctx */ |
| switch (pof2_cm_ird) { |
| case I40IW_HW_IRD_SETTING_64: |
| encoded_ird_size = 3; |
| break; |
| case I40IW_HW_IRD_SETTING_32: |
| case I40IW_HW_IRD_SETTING_16: |
| encoded_ird_size = 2; |
| break; |
| case I40IW_HW_IRD_SETTING_8: |
| case I40IW_HW_IRD_SETTING_4: |
| encoded_ird_size = 1; |
| break; |
| case I40IW_HW_IRD_SETTING_2: |
| default: |
| encoded_ird_size = 0; |
| break; |
| } |
| return encoded_ird_size; |
| } |
| |
| /** |
| * i40iw_record_ird_ord - Record IRD/ORD passed in |
| * @cm_node: connection's node |
| * @conn_ird: connection IRD |
| * @conn_ord: connection ORD |
| */ |
| static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord) |
| { |
| if (conn_ird > I40IW_MAX_IRD_SIZE) |
| conn_ird = I40IW_MAX_IRD_SIZE; |
| |
| if (conn_ord > I40IW_MAX_ORD_SIZE) |
| conn_ord = I40IW_MAX_ORD_SIZE; |
| |
| cm_node->ird_size = conn_ird; |
| cm_node->ord_size = conn_ord; |
| } |
| |
| /** |
| * i40iw_copy_ip_ntohl - change network to host ip |
| * @dst: host ip |
| * @src: big endian |
| */ |
| void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) |
| { |
| *dst++ = ntohl(*src++); |
| *dst++ = ntohl(*src++); |
| *dst++ = ntohl(*src++); |
| *dst = ntohl(*src); |
| } |
| |
| /** |
| * i40iw_copy_ip_htonl - change host addr to network ip |
| * @dst: host ip |
| * @src: little endian |
| */ |
| static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) |
| { |
| *dst++ = htonl(*src++); |
| *dst++ = htonl(*src++); |
| *dst++ = htonl(*src++); |
| *dst = htonl(*src); |
| } |
| |
| /** |
| * i40iw_fill_sockaddr4 - get addr info for passive connection |
| * @cm_node: connection's node |
| * @event: upper layer's cm event |
| */ |
| static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, |
| struct iw_cm_event *event) |
| { |
| struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; |
| struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; |
| |
| laddr->sin_family = AF_INET; |
| raddr->sin_family = AF_INET; |
| |
| laddr->sin_port = htons(cm_node->loc_port); |
| raddr->sin_port = htons(cm_node->rem_port); |
| |
| laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); |
| raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); |
| } |
| |
| /** |
| * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side |
| * @cm_node: connection's node |
| * @event: upper layer's cm event |
| */ |
| static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, |
| struct iw_cm_event *event) |
| { |
| struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; |
| struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; |
| |
| laddr6->sin6_family = AF_INET6; |
| raddr6->sin6_family = AF_INET6; |
| |
| laddr6->sin6_port = htons(cm_node->loc_port); |
| raddr6->sin6_port = htons(cm_node->rem_port); |
| |
| i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, |
| cm_node->loc_addr); |
| i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, |
| cm_node->rem_addr); |
| } |
| |
| /** |
| * i40iw_get_addr_info |
| * @cm_node: contains ip/tcp info |
| * @cm_info: to get a copy of the cm_node ip/tcp info |
| */ |
| static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, |
| struct i40iw_cm_info *cm_info) |
| { |
| cm_info->ipv4 = cm_node->ipv4; |
| cm_info->vlan_id = cm_node->vlan_id; |
| memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); |
| memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); |
| cm_info->loc_port = cm_node->loc_port; |
| cm_info->rem_port = cm_node->rem_port; |
| } |
| |
| /** |
| * i40iw_get_cmevent_info - for cm event upcall |
| * @cm_node: connection's node |
| * @cm_id: upper layers cm struct for the event |
| * @event: upper layer's cm event |
| */ |
| static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, |
| struct iw_cm_id *cm_id, |
| struct iw_cm_event *event) |
| { |
| memcpy(&event->local_addr, &cm_id->m_local_addr, |
| sizeof(event->local_addr)); |
| memcpy(&event->remote_addr, &cm_id->m_remote_addr, |
| sizeof(event->remote_addr)); |
| if (cm_node) { |
| event->private_data = (void *)cm_node->pdata_buf; |
| event->private_data_len = (u8)cm_node->pdata.size; |
| event->ird = cm_node->ird_size; |
| event->ord = cm_node->ord_size; |
| } |
| } |
| |
| /** |
| * i40iw_send_cm_event - upcall cm's event handler |
| * @cm_node: connection's node |
| * @cm_id: upper layer's cm info struct |
| * @type: Event type to indicate |
| * @status: status for the event type |
| */ |
| static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, |
| struct iw_cm_id *cm_id, |
| enum iw_cm_event_type type, |
| int status) |
| { |
| struct iw_cm_event event; |
| |
| memset(&event, 0, sizeof(event)); |
| event.event = type; |
| event.status = status; |
| switch (type) { |
| case IW_CM_EVENT_CONNECT_REQUEST: |
| if (cm_node->ipv4) |
| i40iw_fill_sockaddr4(cm_node, &event); |
| else |
| i40iw_fill_sockaddr6(cm_node, &event); |
| event.provider_data = (void *)cm_node; |
| event.private_data = (void *)cm_node->pdata_buf; |
| event.private_data_len = (u8)cm_node->pdata.size; |
| break; |
| case IW_CM_EVENT_CONNECT_REPLY: |
| i40iw_get_cmevent_info(cm_node, cm_id, &event); |
| break; |
| case IW_CM_EVENT_ESTABLISHED: |
| event.ird = cm_node->ird_size; |
| event.ord = cm_node->ord_size; |
| break; |
| case IW_CM_EVENT_DISCONNECT: |
| break; |
| case IW_CM_EVENT_CLOSE: |
| break; |
| default: |
| i40iw_pr_err("event type received type = %d\n", type); |
| return -1; |
| } |
| return cm_id->event_handler(cm_id, &event); |
| } |
| |
| /** |
| * i40iw_create_event - create cm event |
| * @cm_node: connection's node |
| * @type: Event type to generate |
| */ |
| static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, |
| enum i40iw_cm_event_type type) |
| { |
| struct i40iw_cm_event *event; |
| |
| if (!cm_node->cm_id) |
| return NULL; |
| |
| event = kzalloc(sizeof(*event), GFP_ATOMIC); |
| |
| if (!event) |
| return NULL; |
| |
| event->type = type; |
| event->cm_node = cm_node; |
| memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); |
| memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); |
| event->cm_info.rem_port = cm_node->rem_port; |
| event->cm_info.loc_port = cm_node->loc_port; |
| event->cm_info.cm_id = cm_node->cm_id; |
| |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", |
| cm_node, |
| event, |
| type, |
| event->cm_info.loc_addr, |
| event->cm_info.rem_addr); |
| |
| i40iw_cm_post_event(event); |
| return event; |
| } |
| |
| /** |
| * i40iw_free_retrans_entry - free send entry |
| * @cm_node: connection's node |
| */ |
| static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_sc_dev *dev = cm_node->dev; |
| struct i40iw_timer_entry *send_entry; |
| |
| send_entry = cm_node->send_entry; |
| if (send_entry) { |
| cm_node->send_entry = NULL; |
| i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf); |
| kfree(send_entry); |
| atomic_dec(&cm_node->ref_count); |
| } |
| } |
| |
| /** |
| * i40iw_cleanup_retrans_entry - free send entry with lock |
| * @cm_node: connection's node |
| */ |
| static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| i40iw_free_retrans_entry(cm_node); |
| spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| } |
| |
| static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node) |
| { |
| if ((cm_node->rem_mac[0] == 0x0) && |
| (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) || |
| ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43))))) |
| return true; |
| return false; |
| } |
| |
| /** |
| * i40iw_form_cm_frame - get a free packet and build frame |
| * @cm_node: connection's node ionfo to use in frame |
| * @options: pointer to options info |
| * @hdr: pointer mpa header |
| * @pdata: pointer to private data |
| * @flags: indicates FIN or ACK |
| */ |
| static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, |
| struct i40iw_kmem_info *options, |
| struct i40iw_kmem_info *hdr, |
| struct i40iw_kmem_info *pdata, |
| u8 flags) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| struct i40iw_sc_dev *dev = cm_node->dev; |
| u8 *buf; |
| |
| struct tcphdr *tcph; |
| struct iphdr *iph; |
| struct ipv6hdr *ip6h; |
| struct ethhdr *ethh; |
| u16 packetsize; |
| u16 eth_hlen = ETH_HLEN; |
| u32 opts_len = 0; |
| u32 pd_len = 0; |
| u32 hdr_len = 0; |
| |
| sqbuf = i40iw_puda_get_bufpool(dev->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 (!is_remote_ne020_or_chelsio(cm_node)) |
| pd_len += MPA_ZERO_PAD_LEN; |
| } |
| |
| if (cm_node->vlan_id < VLAN_TAG_PRESENT) |
| eth_hlen += 4; |
| |
| if (cm_node->ipv4) |
| packetsize = sizeof(*iph) + sizeof(*tcph); |
| else |
| packetsize = sizeof(*ip6h) + sizeof(*tcph); |
| packetsize += opts_len + hdr_len + pd_len; |
| |
| memset(buf, 0x00, eth_hlen + packetsize); |
| |
| sqbuf->totallen = packetsize + eth_hlen; |
| sqbuf->maclen = eth_hlen; |
| sqbuf->tcphlen = sizeof(*tcph) + opts_len; |
| sqbuf->scratch = (void *)cm_node; |
| |
| ethh = (struct ethhdr *)buf; |
| buf += eth_hlen; |
| |
| if (cm_node->ipv4) { |
| sqbuf->ipv4 = true; |
| |
| iph = (struct iphdr *)buf; |
| buf += sizeof(*iph); |
| tcph = (struct tcphdr *)buf; |
| buf += sizeof(*tcph); |
| |
| ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
| ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
| if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
| ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); |
| |
| ((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 = 0; |
| iph->tot_len = htons(packetsize); |
| iph->id = htons(++cm_node->tcp_cntxt.loc_id); |
| |
| iph->frag_off = htons(0x4000); |
| iph->ttl = 0x40; |
| iph->protocol = IPPROTO_TCP; |
| iph->saddr = htonl(cm_node->loc_addr[0]); |
| iph->daddr = htonl(cm_node->rem_addr[0]); |
| } else { |
| sqbuf->ipv4 = false; |
| ip6h = (struct ipv6hdr *)buf; |
| buf += sizeof(*ip6h); |
| tcph = (struct tcphdr *)buf; |
| buf += sizeof(*tcph); |
| |
| ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
| ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
| if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
| ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); |
| ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); |
| } else { |
| ethh->h_proto = htons(ETH_P_IPV6); |
| } |
| ip6h->version = 6; |
| ip6h->flow_lbl[0] = 0; |
| ip6h->flow_lbl[1] = 0; |
| ip6h->flow_lbl[2] = 0; |
| ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); |
| ip6h->nexthdr = 6; |
| ip6h->hop_limit = 128; |
| i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, |
| cm_node->loc_addr); |
| i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, |
| cm_node->rem_addr); |
| } |
| |
| tcph->source = htons(cm_node->loc_port); |
| tcph->dest = htons(cm_node->rem_port); |
| |
| tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); |
| |
| if (flags & SET_ACK) { |
| cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; |
| tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); |
| tcph->ack = 1; |
| } else { |
| tcph->ack_seq = 0; |
| } |
| |
| if (flags & SET_SYN) { |
| cm_node->tcp_cntxt.loc_seq_num++; |
| tcph->syn = 1; |
| } else { |
| cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; |
| } |
| |
| if (flags & SET_FIN) { |
| cm_node->tcp_cntxt.loc_seq_num++; |
| tcph->fin = 1; |
| } |
| |
| if (flags & SET_RST) |
| tcph->rst = 1; |
| |
| tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); |
| sqbuf->tcphlen = tcph->doff << 2; |
| tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); |
| tcph->urg_ptr = 0; |
| |
| if (opts_len) { |
| memcpy(buf, options->addr, opts_len); |
| buf += opts_len; |
| } |
| |
| if (hdr_len) { |
| memcpy(buf, hdr->addr, hdr_len); |
| buf += hdr_len; |
| } |
| |
| if (pd_len) |
| memcpy(buf, pdata->addr, pd_len); |
| |
| atomic_set(&sqbuf->refcount, 1); |
| |
| return sqbuf; |
| } |
| |
| /** |
| * i40iw_send_reset - Send RST packet |
| * @cm_node: connection's node |
| */ |
| static int i40iw_send_reset(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| int flags = SET_RST | SET_ACK; |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); |
| if (!sqbuf) { |
| i40iw_pr_err("no sqbuf\n"); |
| return -1; |
| } |
| |
| return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); |
| } |
| |
| /** |
| * i40iw_active_open_err - send event for active side cm error |
| * @cm_node: connection's node |
| * @reset: Flag to send reset or not |
| */ |
| static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) |
| { |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->cm_core->stats_connect_errs++; |
| if (reset) { |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "%s cm_node=%p state=%d\n", |
| __func__, |
| cm_node, |
| cm_node->state); |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| } |
| |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| } |
| |
| /** |
| * i40iw_passive_open_err - handle passive side cm error |
| * @cm_node: connection's node |
| * @reset: send reset or just free cm_node |
| */ |
| static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) |
| { |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->cm_core->stats_passive_errs++; |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "%s cm_node=%p state =%d\n", |
| __func__, |
| cm_node, |
| cm_node->state); |
| if (reset) |
| i40iw_send_reset(cm_node); |
| else |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| |
| /** |
| * i40iw_event_connect_error - to create connect error event |
| * @event: cm information for connect event |
| */ |
| static void i40iw_event_connect_error(struct i40iw_cm_event *event) |
| { |
| struct i40iw_qp *iwqp; |
| struct iw_cm_id *cm_id; |
| |
| cm_id = event->cm_node->cm_id; |
| if (!cm_id) |
| return; |
| |
| iwqp = cm_id->provider_data; |
| |
| if (!iwqp || !iwqp->iwdev) |
| return; |
| |
| iwqp->cm_id = NULL; |
| cm_id->provider_data = NULL; |
| i40iw_send_cm_event(event->cm_node, cm_id, |
| IW_CM_EVENT_CONNECT_REPLY, |
| -ECONNRESET); |
| cm_id->rem_ref(cm_id); |
| i40iw_rem_ref_cm_node(event->cm_node); |
| } |
| |
| /** |
| * i40iw_process_options |
| * @cm_node: connection's node |
| * @optionsloc: point to start of options |
| * @optionsize: size of all options |
| * @syn_packet: flag if syn packet |
| */ |
| static int i40iw_process_options(struct i40iw_cm_node *cm_node, |
| u8 *optionsloc, |
| u32 optionsize, |
| u32 syn_packet) |
| { |
| u32 tmp; |
| u32 offset = 0; |
| union all_known_options *all_options; |
| char got_mss_option = 0; |
| |
| while (offset < optionsize) { |
| all_options = (union all_known_options *)(optionsloc + offset); |
| switch (all_options->as_base.optionnum) { |
| case OPTION_NUMBER_END: |
| offset = optionsize; |
| break; |
| case OPTION_NUMBER_NONE: |
| offset += 1; |
| continue; |
| case OPTION_NUMBER_MSS: |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "%s: MSS Length: %d Offset: %d Size: %d\n", |
| __func__, |
| all_options->as_mss.length, |
| offset, |
| optionsize); |
| got_mss_option = 1; |
| if (all_options->as_mss.length != 4) |
| return -1; |
| tmp = ntohs(all_options->as_mss.mss); |
| if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) |
| cm_node->tcp_cntxt.mss = tmp; |
| break; |
| case OPTION_NUMBER_WINDOW_SCALE: |
| cm_node->tcp_cntxt.snd_wscale = |
| all_options->as_windowscale.shiftcount; |
| break; |
| default: |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "TCP Option not understood: %x\n", |
| all_options->as_base.optionnum); |
| break; |
| } |
| offset += all_options->as_base.length; |
| } |
| if (!got_mss_option && syn_packet) |
| cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; |
| return 0; |
| } |
| |
| /** |
| * i40iw_handle_tcp_options - |
| * @cm_node: connection's node |
| * @tcph: pointer tcp header |
| * @optionsize: size of options rcvd |
| * @passive: active or passive flag |
| */ |
| static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, |
| struct tcphdr *tcph, |
| int optionsize, |
| int passive) |
| { |
| u8 *optionsloc = (u8 *)&tcph[1]; |
| |
| if (optionsize) { |
| if (i40iw_process_options(cm_node, |
| optionsloc, |
| optionsize, |
| (u32)tcph->syn)) { |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "%s: Node %p, Sending RESET\n", |
| __func__, |
| cm_node); |
| if (passive) |
| i40iw_passive_open_err(cm_node, true); |
| else |
| i40iw_active_open_err(cm_node, true); |
| return -1; |
| } |
| } |
| |
| cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << |
| cm_node->tcp_cntxt.snd_wscale; |
| |
| if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
| cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
| return 0; |
| } |
| |
| /** |
| * i40iw_build_mpa_v1 - build a MPA V1 frame |
| * @cm_node: connection's node |
| * @mpa_key: to do read0 or write0 |
| */ |
| static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, |
| void *start_addr, |
| u8 mpa_key) |
| { |
| struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; |
| |
| switch (mpa_key) { |
| case MPA_KEY_REQUEST: |
| memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); |
| break; |
| case MPA_KEY_REPLY: |
| memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); |
| break; |
| default: |
| break; |
| } |
| mpa_frame->flags = IETF_MPA_FLAGS_CRC; |
| mpa_frame->rev = cm_node->mpa_frame_rev; |
| mpa_frame->priv_data_len = htons(cm_node->pdata.size); |
| } |
| |
| /** |
| * i40iw_build_mpa_v2 - build a MPA V2 frame |
| * @cm_node: connection's node |
| * @start_addr: buffer start address |
| * @mpa_key: to do read0 or write0 |
| */ |
| static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, |
| void *start_addr, |
| u8 mpa_key) |
| { |
| struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; |
| struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; |
| |
| /* initialize the upper 5 bytes of the frame */ |
| i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); |
| mpa_frame->flags |= IETF_MPA_V2_FLAG; |
| mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); |
| |
| /* initialize RTR msg */ |
| if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { |
| rtr_msg->ctrl_ird = IETF_NO_IRD_ORD; |
| rtr_msg->ctrl_ord = IETF_NO_IRD_ORD; |
| } else { |
| rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? |
| IETF_NO_IRD_ORD : cm_node->ird_size; |
| rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? |
| IETF_NO_IRD_ORD : cm_node->ord_size; |
| } |
| |
| rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER; |
| rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN; |
| |
| switch (mpa_key) { |
| case MPA_KEY_REQUEST: |
| rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; |
| rtr_msg->ctrl_ord |= IETF_RDMA0_READ; |
| break; |
| case MPA_KEY_REPLY: |
| switch (cm_node->send_rdma0_op) { |
| case SEND_RDMA_WRITE_ZERO: |
| rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; |
| break; |
| case SEND_RDMA_READ_ZERO: |
| rtr_msg->ctrl_ord |= IETF_RDMA0_READ; |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird); |
| rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord); |
| } |
| |
| /** |
| * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 |
| * @cm_node: connection's node |
| * @mpa: mpa: data buffer |
| * @mpa_key: to do read0 or write0 |
| */ |
| static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, |
| struct i40iw_kmem_info *mpa, |
| u8 mpa_key) |
| { |
| int hdr_len = 0; |
| |
| switch (cm_node->mpa_frame_rev) { |
| case IETF_MPA_V1: |
| hdr_len = sizeof(struct ietf_mpa_v1); |
| i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); |
| break; |
| case IETF_MPA_V2: |
| hdr_len = sizeof(struct ietf_mpa_v2); |
| i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); |
| break; |
| default: |
| break; |
| } |
| |
| return hdr_len; |
| } |
| |
| /** |
| * i40iw_send_mpa_request - active node send mpa request to passive node |
| * @cm_node: connection's node |
| */ |
| static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| |
| if (!cm_node) { |
| i40iw_pr_err("cm_node == NULL\n"); |
| return -1; |
| } |
| |
| cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
| cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
| &cm_node->mpa_hdr, |
| MPA_KEY_REQUEST); |
| if (!cm_node->mpa_hdr.size) { |
| i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); |
| return -1; |
| } |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, |
| NULL, |
| &cm_node->mpa_hdr, |
| &cm_node->pdata, |
| SET_ACK); |
| if (!sqbuf) { |
| i40iw_pr_err("sq_buf == NULL\n"); |
| return -1; |
| } |
| return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| } |
| |
| /** |
| * i40iw_send_mpa_reject - |
| * @cm_node: connection's node |
| * @pdata: reject data for connection |
| * @plen: length of reject data |
| */ |
| static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, |
| const void *pdata, |
| u8 plen) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| struct i40iw_kmem_info priv_info; |
| |
| cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
| cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
| &cm_node->mpa_hdr, |
| MPA_KEY_REPLY); |
| |
| cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; |
| priv_info.addr = (void *)pdata; |
| priv_info.size = plen; |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, |
| NULL, |
| &cm_node->mpa_hdr, |
| &priv_info, |
| SET_ACK | SET_FIN); |
| if (!sqbuf) { |
| i40iw_pr_err("no sqbuf\n"); |
| return -ENOMEM; |
| } |
| cm_node->state = I40IW_CM_STATE_FIN_WAIT1; |
| return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| } |
| |
| /** |
| * recv_mpa - process an IETF MPA frame |
| * @cm_node: connection's node |
| * @buffer: Data pointer |
| * @type: to return accept or reject |
| * @len: Len of mpa buffer |
| */ |
| static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) |
| { |
| struct ietf_mpa_v1 *mpa_frame; |
| struct ietf_mpa_v2 *mpa_v2_frame; |
| struct ietf_rtr_msg *rtr_msg; |
| int mpa_hdr_len; |
| int priv_data_len; |
| |
| *type = I40IW_MPA_REQUEST_ACCEPT; |
| |
| if (len < sizeof(struct ietf_mpa_v1)) { |
| i40iw_pr_err("ietf buffer small (%x)\n", len); |
| return -1; |
| } |
| |
| mpa_frame = (struct ietf_mpa_v1 *)buffer; |
| mpa_hdr_len = sizeof(struct ietf_mpa_v1); |
| priv_data_len = ntohs(mpa_frame->priv_data_len); |
| |
| if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { |
| i40iw_pr_err("large pri_data %d\n", priv_data_len); |
| return -1; |
| } |
| if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { |
| i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); |
| return -1; |
| } |
| if (mpa_frame->rev > cm_node->mpa_frame_rev) { |
| i40iw_pr_err("rev %d\n", mpa_frame->rev); |
| return -1; |
| } |
| cm_node->mpa_frame_rev = mpa_frame->rev; |
| |
| if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { |
| if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { |
| i40iw_pr_err("Unexpected MPA Key received\n"); |
| return -1; |
| } |
| } else { |
| if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { |
| i40iw_pr_err("Unexpected MPA Key received\n"); |
| return -1; |
| } |
| } |
| |
| if (priv_data_len + mpa_hdr_len > len) { |
| i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", |
| priv_data_len, mpa_hdr_len, len); |
| return -1; |
| } |
| if (len > MAX_CM_BUFFER) { |
| i40iw_pr_err("ietf buffer large len = %d\n", len); |
| return -1; |
| } |
| |
| switch (mpa_frame->rev) { |
| case IETF_MPA_V2:{ |
| u16 ird_size; |
| u16 ord_size; |
| u16 ctrl_ord; |
| u16 ctrl_ird; |
| |
| mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; |
| mpa_hdr_len += IETF_RTR_MSG_SIZE; |
| rtr_msg = &mpa_v2_frame->rtr_msg; |
| |
| /* parse rtr message */ |
| ctrl_ord = ntohs(rtr_msg->ctrl_ord); |
| ctrl_ird = ntohs(rtr_msg->ctrl_ird); |
| ird_size = ctrl_ird & IETF_NO_IRD_ORD; |
| ord_size = ctrl_ord & IETF_NO_IRD_ORD; |
| |
| if (!(ctrl_ird & IETF_PEER_TO_PEER)) |
| return -1; |
| |
| if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { |
| cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; |
| goto negotiate_done; |
| } |
| |
| if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { |
| /* responder */ |
| if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) |
| cm_node->ird_size = 1; |
| if (cm_node->ord_size > ird_size) |
| cm_node->ord_size = ird_size; |
| } else { |
| /* initiator */ |
| if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) |
| return -1; |
| if (cm_node->ord_size > ird_size) |
| cm_node->ord_size = ird_size; |
| |
| if (cm_node->ird_size < ord_size) |
| /* no resources available */ |
| return -1; |
| } |
| |
| negotiate_done: |
| if (ctrl_ord & IETF_RDMA0_READ) |
| cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; |
| else if (ctrl_ord & IETF_RDMA0_WRITE) |
| cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; |
| else /* Not supported RDMA0 operation */ |
| return -1; |
| i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, |
| "MPAV2: Negotiated ORD: %d, IRD: %d\n", |
| cm_node->ord_size, cm_node->ird_size); |
| break; |
| } |
| break; |
| case IETF_MPA_V1: |
| default: |
| break; |
| } |
| |
| memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); |
| cm_node->pdata.size = priv_data_len; |
| |
| if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) |
| *type = I40IW_MPA_REQUEST_REJECT; |
| |
| if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) |
| cm_node->snd_mark_en = true; |
| |
| return 0; |
| } |
| |
| /** |
| * i40iw_schedule_cm_timer |
| * @@cm_node: connection's node |
| * @sqbuf: buffer to send |
| * @type: if it es send ot close |
| * @send_retrans: if rexmits to be done |
| * @close_when_complete: is cm_node to be removed |
| * |
| * note - cm_node needs to be protected before calling this. Encase in: |
| * i40iw_rem_ref_cm_node(cm_core, cm_node); |
| * i40iw_schedule_cm_timer(...) |
| * atomic_inc(&cm_node->ref_count); |
| */ |
| int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *sqbuf, |
| enum i40iw_timer_type type, |
| int send_retrans, |
| int close_when_complete) |
| { |
| struct i40iw_sc_dev *dev = cm_node->dev; |
| struct i40iw_cm_core *cm_core = cm_node->cm_core; |
| struct i40iw_timer_entry *new_send; |
| int ret = 0; |
| u32 was_timer_set; |
| unsigned long flags; |
| |
| new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); |
| if (!new_send) { |
| i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); |
| return -ENOMEM; |
| } |
| new_send->retrycount = I40IW_DEFAULT_RETRYS; |
| new_send->retranscount = I40IW_DEFAULT_RETRANS; |
| new_send->sqbuf = sqbuf; |
| new_send->timetosend = jiffies; |
| new_send->type = type; |
| new_send->send_retrans = send_retrans; |
| new_send->close_when_complete = close_when_complete; |
| |
| if (type == I40IW_TIMER_TYPE_CLOSE) { |
| new_send->timetosend += (HZ / 10); |
| if (cm_node->close_entry) { |
| kfree(new_send); |
| i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); |
| i40iw_pr_err("already close entry\n"); |
| return -EINVAL; |
| } |
| cm_node->close_entry = new_send; |
| } |
| |
| if (type == I40IW_TIMER_TYPE_SEND) { |
| spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| cm_node->send_entry = new_send; |
| atomic_inc(&cm_node->ref_count); |
| spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; |
| |
| atomic_inc(&sqbuf->refcount); |
| i40iw_puda_send_buf(dev->ilq, sqbuf); |
| if (!send_retrans) { |
| i40iw_cleanup_retrans_entry(cm_node); |
| if (close_when_complete) |
| i40iw_rem_ref_cm_node(cm_node); |
| return ret; |
| } |
| } |
| |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| was_timer_set = timer_pending(&cm_core->tcp_timer); |
| |
| if (!was_timer_set) { |
| cm_core->tcp_timer.expires = new_send->timetosend; |
| add_timer(&cm_core->tcp_timer); |
| } |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| |
| return ret; |
| } |
| |
| /** |
| * i40iw_retrans_expired - Could not rexmit the packet |
| * @cm_node: connection's node |
| */ |
| static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) |
| { |
| struct iw_cm_id *cm_id = cm_node->cm_id; |
| enum i40iw_cm_node_state state = cm_node->state; |
| |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| switch (state) { |
| case I40IW_CM_STATE_SYN_RCVD: |
| case I40IW_CM_STATE_CLOSING: |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| case I40IW_CM_STATE_FIN_WAIT1: |
| case I40IW_CM_STATE_LAST_ACK: |
| if (cm_node->cm_id) |
| cm_id->rem_ref(cm_id); |
| i40iw_send_reset(cm_node); |
| break; |
| default: |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_handle_close_entry - for handling retry/timeouts |
| * @cm_node: connection's node |
| * @rem_node: flag for remove cm_node |
| */ |
| static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) |
| { |
| struct i40iw_timer_entry *close_entry = cm_node->close_entry; |
| struct iw_cm_id *cm_id = cm_node->cm_id; |
| struct i40iw_qp *iwqp; |
| unsigned long flags; |
| |
| if (!close_entry) |
| return; |
| iwqp = (struct i40iw_qp *)close_entry->sqbuf; |
| if (iwqp) { |
| spin_lock_irqsave(&iwqp->lock, flags); |
| if (iwqp->cm_id) { |
| iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; |
| iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; |
| iwqp->last_aeq = I40IW_AE_RESET_SENT; |
| iwqp->ibqp_state = IB_QPS_ERR; |
| spin_unlock_irqrestore(&iwqp->lock, flags); |
| i40iw_cm_disconn(iwqp); |
| } else { |
| spin_unlock_irqrestore(&iwqp->lock, flags); |
| } |
| } else if (rem_node) { |
| /* TIME_WAIT state */ |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| if (cm_id) |
| cm_id->rem_ref(cm_id); |
| kfree(close_entry); |
| cm_node->close_entry = NULL; |
| } |
| |
| /** |
| * i40iw_cm_timer_tick - system's timer expired callback |
| * @pass: Pointing to cm_core |
| */ |
| static void i40iw_cm_timer_tick(unsigned long pass) |
| { |
| unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_timer_entry *send_entry, *close_entry; |
| struct list_head *list_core_temp; |
| struct list_head *list_node; |
| struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass; |
| u32 settimer = 0; |
| unsigned long timetosend; |
| struct i40iw_sc_dev *dev; |
| unsigned long flags; |
| |
| struct list_head timer_list; |
| |
| INIT_LIST_HEAD(&timer_list); |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| |
| list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { |
| cm_node = container_of(list_node, struct i40iw_cm_node, list); |
| if (cm_node->close_entry || cm_node->send_entry) { |
| atomic_inc(&cm_node->ref_count); |
| list_add(&cm_node->timer_entry, &timer_list); |
| } |
| } |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| |
| list_for_each_safe(list_node, list_core_temp, &timer_list) { |
| cm_node = container_of(list_node, |
| struct i40iw_cm_node, |
| timer_entry); |
| close_entry = cm_node->close_entry; |
| |
| if (close_entry) { |
| if (time_after(close_entry->timetosend, jiffies)) { |
| if (nexttimeout > close_entry->timetosend || |
| !settimer) { |
| nexttimeout = close_entry->timetosend; |
| settimer = 1; |
| } |
| } else { |
| i40iw_handle_close_entry(cm_node, 1); |
| } |
| } |
| |
| spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| |
| send_entry = cm_node->send_entry; |
| if (!send_entry) |
| goto done; |
| if (time_after(send_entry->timetosend, jiffies)) { |
| if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { |
| if ((nexttimeout > send_entry->timetosend) || |
| !settimer) { |
| nexttimeout = send_entry->timetosend; |
| settimer = 1; |
| } |
| } else { |
| i40iw_free_retrans_entry(cm_node); |
| } |
| goto done; |
| } |
| |
| if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || |
| (cm_node->state == I40IW_CM_STATE_CLOSED)) { |
| i40iw_free_retrans_entry(cm_node); |
| goto done; |
| } |
| |
| if (!send_entry->retranscount || !send_entry->retrycount) { |
| i40iw_free_retrans_entry(cm_node); |
| |
| spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| i40iw_retrans_expired(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| goto done; |
| } |
| cm_node->cm_core->stats_pkt_retrans++; |
| spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| |
| dev = cm_node->dev; |
| atomic_inc(&send_entry->sqbuf->refcount); |
| i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf); |
| spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| if (send_entry->send_retrans) { |
| send_entry->retranscount--; |
| timetosend = (I40IW_RETRY_TIMEOUT << |
| (I40IW_DEFAULT_RETRANS - |
| send_entry->retranscount)); |
| |
| send_entry->timetosend = jiffies + |
| min(timetosend, I40IW_MAX_TIMEOUT); |
| if (nexttimeout > send_entry->timetosend || !settimer) { |
| nexttimeout = send_entry->timetosend; |
| settimer = 1; |
| } |
| } else { |
| int close_when_complete; |
| |
| close_when_complete = send_entry->close_when_complete; |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "cm_node=%p state=%d\n", |
| cm_node, |
| cm_node->state); |
| i40iw_free_retrans_entry(cm_node); |
| if (close_when_complete) |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| done: |
| spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| |
| if (settimer) { |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| if (!timer_pending(&cm_core->tcp_timer)) { |
| cm_core->tcp_timer.expires = nexttimeout; |
| add_timer(&cm_core->tcp_timer); |
| } |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| } |
| } |
| |
| /** |
| * i40iw_send_syn - send SYN packet |
| * @cm_node: connection's node |
| * @sendack: flag to set ACK bit or not |
| */ |
| int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| int flags = SET_SYN; |
| char optionsbuffer[sizeof(struct option_mss) + |
| sizeof(struct option_windowscale) + |
| sizeof(struct option_base) + TCP_OPTIONS_PADDING]; |
| struct i40iw_kmem_info opts; |
| |
| int optionssize = 0; |
| /* Sending MSS option */ |
| union all_known_options *options; |
| |
| opts.addr = optionsbuffer; |
| if (!cm_node) { |
| i40iw_pr_err("no cm_node\n"); |
| return -EINVAL; |
| } |
| |
| options = (union all_known_options *)&optionsbuffer[optionssize]; |
| options->as_mss.optionnum = OPTION_NUMBER_MSS; |
| options->as_mss.length = sizeof(struct option_mss); |
| options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); |
| optionssize += sizeof(struct option_mss); |
| |
| options = (union all_known_options *)&optionsbuffer[optionssize]; |
| options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; |
| options->as_windowscale.length = sizeof(struct option_windowscale); |
| options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; |
| optionssize += sizeof(struct option_windowscale); |
| options = (union all_known_options *)&optionsbuffer[optionssize]; |
| options->as_end = OPTION_NUMBER_END; |
| optionssize += 1; |
| |
| if (sendack) |
| flags |= SET_ACK; |
| |
| opts.size = optionssize; |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); |
| if (!sqbuf) { |
| i40iw_pr_err("no sqbuf\n"); |
| return -1; |
| } |
| return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| } |
| |
| /** |
| * i40iw_send_ack - Send ACK packet |
| * @cm_node: connection's node |
| */ |
| static void i40iw_send_ack(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); |
| if (sqbuf) |
| i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf); |
| else |
| i40iw_pr_err("no sqbuf\n"); |
| } |
| |
| /** |
| * i40iw_send_fin - Send FIN pkt |
| * @cm_node: connection's node |
| */ |
| static int i40iw_send_fin(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_puda_buf *sqbuf; |
| |
| sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); |
| if (!sqbuf) { |
| i40iw_pr_err("no sqbuf\n"); |
| return -1; |
| } |
| return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| } |
| |
| /** |
| * i40iw_find_node - find a cm node that matches the reference cm node |
| * @cm_core: cm's core |
| * @rem_port: remote tcp port num |
| * @rem_addr: remote ip addr |
| * @loc_port: local tcp port num |
| * @loc_addr: loc ip addr |
| * @add_refcnt: flag to increment refcount of cm_node |
| */ |
| struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, |
| u16 rem_port, |
| u32 *rem_addr, |
| u16 loc_port, |
| u32 *loc_addr, |
| bool add_refcnt) |
| { |
| struct list_head *hte; |
| struct i40iw_cm_node *cm_node; |
| unsigned long flags; |
| |
| hte = &cm_core->connected_nodes; |
| |
| /* walk list and find cm_node associated with this session ID */ |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| list_for_each_entry(cm_node, hte, list) { |
| if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && |
| (cm_node->loc_port == loc_port) && |
| !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) && |
| (cm_node->rem_port == rem_port)) { |
| if (add_refcnt) |
| atomic_inc(&cm_node->ref_count); |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| return cm_node; |
| } |
| } |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| |
| /* no owner node */ |
| return NULL; |
| } |
| |
| /** |
| * i40iw_find_listener - find a cm node listening on this addr-port pair |
| * @cm_core: cm's core |
| * @dst_port: listener tcp port num |
| * @dst_addr: listener ip addr |
| * @listener_state: state to match with listen node's |
| */ |
| static struct i40iw_cm_listener *i40iw_find_listener( |
| struct i40iw_cm_core *cm_core, |
| u32 *dst_addr, |
| u16 dst_port, |
| u16 vlan_id, |
| enum i40iw_cm_listener_state |
| listener_state) |
| { |
| struct i40iw_cm_listener *listen_node; |
| static const u32 ip_zero[4] = { 0, 0, 0, 0 }; |
| u32 listen_addr[4]; |
| u16 listen_port; |
| unsigned long flags; |
| |
| /* walk list and find cm_node associated with this session ID */ |
| spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
| memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); |
| listen_port = listen_node->loc_port; |
| /* compare node pair, return node handle if a match */ |
| if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || |
| !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && |
| (listen_port == dst_port) && |
| (listener_state & listen_node->listener_state)) { |
| atomic_inc(&listen_node->ref_count); |
| spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| return listen_node; |
| } |
| } |
| spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| return NULL; |
| } |
| |
| /** |
| * i40iw_add_hte_node - add a cm node to the hash table |
| * @cm_core: cm's core |
| * @cm_node: connection's node |
| */ |
| static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, |
| struct i40iw_cm_node *cm_node) |
| { |
| struct list_head *hte; |
| unsigned long flags; |
| |
| if (!cm_node || !cm_core) { |
| i40iw_pr_err("cm_node or cm_core == NULL\n"); |
| return; |
| } |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| |
| /* get a handle on the hash table element (list head for this slot) */ |
| hte = &cm_core->connected_nodes; |
| list_add_tail(&cm_node->list, hte); |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| } |
| |
| /** |
| * listen_port_in_use - determine if port is in use |
| * @port: Listen port number |
| */ |
| static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port) |
| { |
| struct i40iw_cm_listener *listen_node; |
| unsigned long flags; |
| bool ret = false; |
| |
| spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
| if (listen_node->loc_port == port) { |
| ret = true; |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| return ret; |
| } |
| |
| /** |
| * i40iw_del_multiple_qhash - Remove qhash and child listens |
| * @iwdev: iWarp device |
| * @cm_info: CM info for parent listen node |
| * @cm_parent_listen_node: The parent listen node |
| */ |
| static enum i40iw_status_code i40iw_del_multiple_qhash( |
| struct i40iw_device *iwdev, |
| struct i40iw_cm_info *cm_info, |
| struct i40iw_cm_listener *cm_parent_listen_node) |
| { |
| struct i40iw_cm_listener *child_listen_node; |
| enum i40iw_status_code ret = I40IW_ERR_CONFIG; |
| struct list_head *pos, *tpos; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { |
| child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); |
| if (child_listen_node->ipv4) |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "removing child listen for IP=%pI4, port=%d, vlan=%d\n", |
| child_listen_node->loc_addr, |
| child_listen_node->loc_port, |
| child_listen_node->vlan_id); |
| else |
| i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, |
| "removing child listen for IP=%pI6, port=%d, vlan=%d\n", |
| child_listen_node->loc_addr, |
| child_listen_node->loc_port, |
| child_listen_node->vlan_id); |
| list_del(pos); |
| memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| sizeof(cm_info->loc_addr)); |
| cm_info->vlan_id = child_listen_node->vlan_id; |
| ret = i40iw_manage_qhash(iwdev, cm_info, |
| I40IW_QHASH_TYPE_TCP_SYN, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); |
| kfree(child_listen_node); |
| cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "freed pointer = %p\n", |
| child_listen_node); |
| } |
| spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| |
| return ret; |
| } |
| |
| /** |
| * i40iw_netdev_vlan_ipv6 - Gets the netdev 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 net_device of the IPv6 address and also sets the |
| * vlan id and mac for that address. |
| */ |
| static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) |
| { |
| struct net_device *ip_dev = NULL; |
| #if IS_ENABLED(CONFIG_IPV6) |
| struct in6_addr laddr6; |
| |
| i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); |
| if (vlan_id) |
| *vlan_id = I40IW_NO_VLAN; |
| 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(); |
| #endif |
| return ip_dev; |
| } |
| |
| /** |
| * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address |
| * @addr: local IPv4 address |
| */ |
| static u16 i40iw_get_vlan_ipv4(u32 *addr) |
| { |
| struct net_device *netdev; |
| u16 vlan_id = I40IW_NO_VLAN; |
| |
| netdev = ip_dev_find(&init_net, htonl(addr[0])); |
| if (netdev) { |
| vlan_id = rdma_vlan_dev_vlan_id(netdev); |
| dev_put(netdev); |
| } |
| return vlan_id; |
| } |
| |
| /** |
| * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 |
| * @iwdev: iWarp device |
| * @cm_info: CM info for parent listen node |
| * @cm_parent_listen_node: The parent listen node |
| * |
| * Adds a qhash and a child listen node for every IPv6 address |
| * on the adapter and adds the associated qhash filter |
| */ |
| static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, |
| struct i40iw_cm_info *cm_info, |
| struct i40iw_cm_listener *cm_parent_listen_node) |
| { |
| struct net_device *ip_dev; |
| struct inet6_dev *idev; |
| struct inet6_ifaddr *ifp; |
| enum i40iw_status_code ret = 0; |
| struct i40iw_cm_listener *child_listen_node; |
| unsigned long flags; |
| |
| rtnl_lock(); |
| for_each_netdev_rcu(&init_net, ip_dev) { |
| if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && |
| (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || |
| (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { |
| idev = __in6_dev_get(ip_dev); |
| if (!idev) { |
| i40iw_pr_err("idev == NULL\n"); |
| break; |
| } |
| list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "IP=%pI6, vlan_id=%d, MAC=%pM\n", |
| &ifp->addr, |
| rdma_vlan_dev_vlan_id(ip_dev), |
| ip_dev->dev_addr); |
| child_listen_node = |
| kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "Allocating child listener %p\n", |
| child_listen_node); |
| if (!child_listen_node) { |
| i40iw_pr_err("listener memory allocation\n"); |
| ret = I40IW_ERR_NO_MEMORY; |
| goto exit; |
| } |
| cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); |
| cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
| |
| memcpy(child_listen_node, cm_parent_listen_node, |
| sizeof(*child_listen_node)); |
| |
| i40iw_copy_ip_ntohl(child_listen_node->loc_addr, |
| ifp->addr.in6_u.u6_addr32); |
| memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| sizeof(cm_info->loc_addr)); |
| |
| ret = i40iw_manage_qhash(iwdev, cm_info, |
| I40IW_QHASH_TYPE_TCP_SYN, |
| I40IW_QHASH_MANAGE_TYPE_ADD, |
| NULL, true); |
| if (!ret) { |
| spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| list_add(&child_listen_node->child_listen_list, |
| &cm_parent_listen_node->child_listen_list); |
| spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
| } else { |
| kfree(child_listen_node); |
| } |
| } |
| } |
| } |
| exit: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| /** |
| * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 |
| * @iwdev: iWarp device |
| * @cm_info: CM info for parent listen node |
| * @cm_parent_listen_node: The parent listen node |
| * |
| * Adds a qhash and a child listen node for every IPv4 address |
| * on the adapter and adds the associated qhash filter |
| */ |
| static enum i40iw_status_code i40iw_add_mqh_4( |
| struct i40iw_device *iwdev, |
| struct i40iw_cm_info *cm_info, |
| struct i40iw_cm_listener *cm_parent_listen_node) |
| { |
| struct net_device *dev; |
| struct in_device *idev; |
| struct i40iw_cm_listener *child_listen_node; |
| enum i40iw_status_code ret = 0; |
| unsigned long flags; |
| |
| rtnl_lock(); |
| for_each_netdev(&init_net, dev) { |
| if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && |
| (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || |
| (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { |
| idev = in_dev_get(dev); |
| for_ifa(idev) { |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", |
| &ifa->ifa_address, |
| rdma_vlan_dev_vlan_id(dev), |
| dev->dev_addr); |
| child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); |
| cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "Allocating child listener %p\n", |
| child_listen_node); |
| if (!child_listen_node) { |
| i40iw_pr_err("listener memory allocation\n"); |
| in_dev_put(idev); |
| ret = I40IW_ERR_NO_MEMORY; |
| goto exit; |
| } |
| cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); |
| cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
| memcpy(child_listen_node, |
| cm_parent_listen_node, |
| sizeof(*child_listen_node)); |
| |
| child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); |
| memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| sizeof(cm_info->loc_addr)); |
| |
| ret = i40iw_manage_qhash(iwdev, |
| cm_info, |
| I40IW_QHASH_TYPE_TCP_SYN, |
| I40IW_QHASH_MANAGE_TYPE_ADD, |
| NULL, |
| true); |
| if (!ret) { |
| spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| list_add(&child_listen_node->child_listen_list, |
| &cm_parent_listen_node->child_listen_list); |
| spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| } else { |
| kfree(child_listen_node); |
| cm_parent_listen_node->cm_core->stats_listen_nodes_created--; |
| } |
| } |
| endfor_ifa(idev); |
| in_dev_put(idev); |
| } |
| } |
| exit: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| /** |
| * i40iw_dec_refcnt_listen - delete listener and associated cm nodes |
| * @cm_core: cm's core |
| * @free_hanging_nodes: to free associated cm_nodes |
| * @apbvt_del: flag to delete the apbvt |
| */ |
| static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, |
| struct i40iw_cm_listener *listener, |
| int free_hanging_nodes, bool apbvt_del) |
| { |
| int ret = -EINVAL; |
| int err = 0; |
| struct list_head *list_pos; |
| struct list_head *list_temp; |
| struct i40iw_cm_node *cm_node; |
| struct list_head reset_list; |
| struct i40iw_cm_info nfo; |
| struct i40iw_cm_node *loopback; |
| enum i40iw_cm_node_state old_state; |
| unsigned long flags; |
| |
| /* free non-accelerated child nodes for this listener */ |
| INIT_LIST_HEAD(&reset_list); |
| if (free_hanging_nodes) { |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) { |
| cm_node = container_of(list_pos, struct i40iw_cm_node, list); |
| if ((cm_node->listener == listener) && !cm_node->accelerated) { |
| atomic_inc(&cm_node->ref_count); |
| list_add(&cm_node->reset_entry, &reset_list); |
| } |
| } |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| } |
| |
| list_for_each_safe(list_pos, list_temp, &reset_list) { |
| cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); |
| loopback = cm_node->loopbackpartner; |
| if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { |
| i40iw_rem_ref_cm_node(cm_node); |
| } else { |
| if (!loopback) { |
| i40iw_cleanup_retrans_entry(cm_node); |
| err = i40iw_send_reset(cm_node); |
| if (err) { |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_pr_err("send reset\n"); |
| } else { |
| old_state = cm_node->state; |
| cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
| if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| } else { |
| struct i40iw_cm_event event; |
| |
| event.cm_node = loopback; |
| memcpy(event.cm_info.rem_addr, |
| loopback->rem_addr, sizeof(event.cm_info.rem_addr)); |
| memcpy(event.cm_info.loc_addr, |
| loopback->loc_addr, sizeof(event.cm_info.loc_addr)); |
| event.cm_info.rem_port = loopback->rem_port; |
| event.cm_info.loc_port = loopback->loc_port; |
| event.cm_info.cm_id = loopback->cm_id; |
| event.cm_info.ipv4 = loopback->ipv4; |
| atomic_inc(&loopback->ref_count); |
| loopback->state = I40IW_CM_STATE_CLOSED; |
| i40iw_event_connect_error(&event); |
| cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| } |
| } |
| |
| if (!atomic_dec_return(&listener->ref_count)) { |
| spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| list_del(&listener->list); |
| spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| |
| if (listener->iwdev) { |
| if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port)) |
| i40iw_manage_apbvt(listener->iwdev, |
| listener->loc_port, |
| I40IW_MANAGE_APBVT_DEL); |
| |
| memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); |
| nfo.loc_port = listener->loc_port; |
| nfo.ipv4 = listener->ipv4; |
| nfo.vlan_id = listener->vlan_id; |
| |
| if (!list_empty(&listener->child_listen_list)) { |
| i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); |
| } else { |
| if (listener->qhash_set) |
| i40iw_manage_qhash(listener->iwdev, |
| &nfo, |
| I40IW_QHASH_TYPE_TCP_SYN, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, |
| NULL, |
| false); |
| } |
| } |
| |
| cm_core->stats_listen_destroyed++; |
| kfree(listener); |
| cm_core->stats_listen_nodes_destroyed++; |
| listener = NULL; |
| ret = 0; |
| } |
| |
| if (listener) { |
| if (atomic_read(&listener->pend_accepts_cnt) > 0) |
| i40iw_debug(cm_core->dev, |
| I40IW_DEBUG_CM, |
| "%s: listener (%p) pending accepts=%u\n", |
| __func__, |
| listener, |
| atomic_read(&listener->pend_accepts_cnt)); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * i40iw_cm_del_listen - delete a linstener |
| * @cm_core: cm's core |
| * @listener: passive connection's listener |
| * @apbvt_del: flag to delete apbvt |
| */ |
| static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, |
| struct i40iw_cm_listener *listener, |
| bool apbvt_del) |
| { |
| listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; |
| listener->cm_id = NULL; /* going to be destroyed pretty soon */ |
| return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); |
| } |
| |
| /** |
| * i40iw_addr_resolve_neigh - resolve neighbor address |
| * @iwdev: iwarp device structure |
| * @src_ip: local ip address |
| * @dst_ip: remote ip address |
| * @arpindex: if there is an arp entry |
| */ |
| static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, |
| u32 src_ip, |
| u32 dst_ip, |
| int arpindex) |
| { |
| struct rtable *rt; |
| struct neighbour *neigh; |
| int rc = arpindex; |
| struct net_device *netdev = iwdev->netdev; |
| __be32 dst_ipaddr = htonl(dst_ip); |
| __be32 src_ipaddr = htonl(src_ip); |
| |
| rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); |
| if (IS_ERR(rt)) { |
| i40iw_pr_err("ip_route_output\n"); |
| return rc; |
| } |
| |
| if (netif_is_bond_slave(netdev)) |
| netdev = netdev_master_upper_dev_get(netdev); |
| |
| neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); |
| |
| rcu_read_lock(); |
| if (neigh) { |
| if (neigh->nud_state & NUD_VALID) { |
| if (arpindex >= 0) { |
| if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, |
| neigh->ha)) |
| /* Mac address same as arp table */ |
| goto resolve_neigh_exit; |
| i40iw_manage_arp_cache(iwdev, |
| iwdev->arp_table[arpindex].mac_addr, |
| &dst_ip, |
| true, |
| I40IW_ARP_DELETE); |
| } |
| |
| i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); |
| rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); |
| } else { |
| neigh_event_send(neigh, NULL); |
| } |
| } |
| resolve_neigh_exit: |
| |
| rcu_read_unlock(); |
| if (neigh) |
| neigh_release(neigh); |
| |
| ip_rt_put(rt); |
| return rc; |
| } |
| |
| /** |
| * i40iw_get_dst_ipv6 |
| */ |
| #if IS_ENABLED(CONFIG_IPV6) |
| static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, |
| struct sockaddr_in6 *dst_addr) |
| { |
| struct dst_entry *dst; |
| struct flowi6 fl6; |
| |
| memset(&fl6, 0, sizeof(fl6)); |
| fl6.daddr = dst_addr->sin6_addr; |
| fl6.saddr = src_addr->sin6_addr; |
| if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) |
| fl6.flowi6_oif = dst_addr->sin6_scope_id; |
| |
| dst = ip6_route_output(&init_net, NULL, &fl6); |
| return dst; |
| } |
| #endif |
| |
| /** |
| * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address |
| * @iwdev: iwarp device structure |
| * @dst_ip: remote ip address |
| * @arpindex: if there is an arp entry |
| */ |
| #if IS_ENABLED(CONFIG_IPV6) |
| static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, |
| u32 *src, |
| u32 *dest, |
| int arpindex) |
| { |
| struct neighbour *neigh; |
| int rc = arpindex; |
| struct net_device *netdev = iwdev->netdev; |
| struct dst_entry *dst; |
| struct sockaddr_in6 dst_addr; |
| struct sockaddr_in6 src_addr; |
| |
| memset(&dst_addr, 0, sizeof(dst_addr)); |
| dst_addr.sin6_family = AF_INET6; |
| i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); |
| memset(&src_addr, 0, sizeof(src_addr)); |
| src_addr.sin6_family = AF_INET6; |
| i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); |
| dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); |
| if (!dst || dst->error) { |
| if (dst) { |
| dst_release(dst); |
| i40iw_pr_err("ip6_route_output returned dst->error = %d\n", |
| dst->error); |
| } |
| return rc; |
| } |
| |
| if (netif_is_bond_slave(netdev)) |
| netdev = netdev_master_upper_dev_get(netdev); |
| |
| neigh = dst_neigh_lookup(dst, &dst_addr); |
| |
| rcu_read_lock(); |
| if (neigh) { |
| i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); |
| if (neigh->nud_state & NUD_VALID) { |
| if (arpindex >= 0) { |
| if (ether_addr_equal |
| (iwdev->arp_table[arpindex].mac_addr, |
| neigh->ha)) { |
| /* Mac address same as in arp table */ |
| goto resolve_neigh_exit6; |
| } |
| i40iw_manage_arp_cache(iwdev, |
| iwdev->arp_table[arpindex].mac_addr, |
| dest, |
| false, |
| I40IW_ARP_DELETE); |
| } |
| i40iw_manage_arp_cache(iwdev, |
| neigh->ha, |
| dest, |
| false, |
| I40IW_ARP_ADD); |
| rc = i40iw_arp_table(iwdev, |
| dest, |
| false, |
| NULL, |
| I40IW_ARP_RESOLVE); |
| } else { |
| neigh_event_send(neigh, NULL); |
| } |
| } |
| |
| resolve_neigh_exit6: |
| rcu_read_unlock(); |
| if (neigh) |
| neigh_release(neigh); |
| dst_release(dst); |
| return rc; |
| } |
| #endif |
| |
| /** |
| * i40iw_ipv4_is_loopback - check if loopback |
| * @loc_addr: local addr to compare |
| * @rem_addr: remote address |
| */ |
| static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) |
| { |
| return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); |
| } |
| |
| /** |
| * i40iw_ipv6_is_loopback - check if loopback |
| * @loc_addr: local addr to compare |
| * @rem_addr: remote address |
| */ |
| static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) |
| { |
| struct in6_addr raddr6; |
| |
| i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); |
| return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6)); |
| } |
| |
| /** |
| * i40iw_make_cm_node - create a new instance of a cm node |
| * @cm_core: cm's core |
| * @iwdev: iwarp device structure |
| * @cm_info: quad info for connection |
| * @listener: passive connection's listener |
| */ |
| static struct i40iw_cm_node *i40iw_make_cm_node( |
| struct i40iw_cm_core *cm_core, |
| struct i40iw_device *iwdev, |
| struct i40iw_cm_info *cm_info, |
| struct i40iw_cm_listener *listener) |
| { |
| struct i40iw_cm_node *cm_node; |
| struct timespec ts; |
| 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; |
| memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); |
| memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); |
| cm_node->loc_port = cm_info->loc_port; |
| cm_node->rem_port = cm_info->rem_port; |
| |
| cm_node->mpa_frame_rev = iwdev->mpa_version; |
| cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; |
| cm_node->ird_size = I40IW_MAX_IRD_SIZE; |
| cm_node->ord_size = I40IW_MAX_ORD_SIZE; |
| |
| cm_node->listener = listener; |
| cm_node->cm_id = cm_info->cm_id; |
| ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); |
| spin_lock_init(&cm_node->retrans_list_lock); |
| |
| atomic_set(&cm_node->ref_count, 1); |
| /* associate our parent CM core */ |
| cm_node->cm_core = cm_core; |
| cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; |
| cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| cm_node->tcp_cntxt.rcv_wnd = |
| I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| ts = current_kernel_time(); |
| cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); |
| cm_node->tcp_cntxt.mss = iwdev->mss; |
| |
| cm_node->iwdev = iwdev; |
| cm_node->dev = &iwdev->sc_dev; |
| |
| if ((cm_node->ipv4 && |
| i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
| (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, |
| cm_node->rem_addr))) { |
| arpindex = i40iw_arp_table(iwdev, |
| cm_node->rem_addr, |
| false, |
| NULL, |
| I40IW_ARP_RESOLVE); |
| } else { |
| oldarpindex = i40iw_arp_table(iwdev, |
| cm_node->rem_addr, |
| false, |
| NULL, |
| I40IW_ARP_RESOLVE); |
| if (cm_node->ipv4) |
| arpindex = i40iw_addr_resolve_neigh(iwdev, |
| cm_info->loc_addr[0], |
| cm_info->rem_addr[0], |
| oldarpindex); |
| #if IS_ENABLED(CONFIG_IPV6) |
| else |
| arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, |
| cm_info->loc_addr, |
| cm_info->rem_addr, |
| oldarpindex); |
| #endif |
| } |
| if (arpindex < 0) { |
| i40iw_pr_err("cm_node arpindex\n"); |
| kfree(cm_node); |
| return NULL; |
| } |
| ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); |
| i40iw_add_hte_node(cm_core, cm_node); |
| cm_core->stats_nodes_created++; |
| return cm_node; |
| } |
| |
| /** |
| * i40iw_rem_ref_cm_node - destroy an instance of a cm node |
| * @cm_node: connection's node |
| */ |
| static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_cm_core *cm_core = cm_node->cm_core; |
| struct i40iw_qp *iwqp; |
| struct i40iw_cm_info nfo; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); |
| if (atomic_dec_return(&cm_node->ref_count)) { |
| spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| return; |
| } |
| list_del(&cm_node->list); |
| spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| |
| /* if the node is destroyed before connection was accelerated */ |
| if (!cm_node->accelerated && cm_node->accept_pend) { |
| pr_err("node destroyed before established\n"); |
| atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| } |
| if (cm_node->close_entry) |
| i40iw_handle_close_entry(cm_node, 0); |
| if (cm_node->listener) { |
| i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); |
| } else { |
| if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->loc_port)) && |
| cm_node->apbvt_set && cm_node->iwdev) { |
| i40iw_manage_apbvt(cm_node->iwdev, |
| cm_node->loc_port, |
| I40IW_MANAGE_APBVT_DEL); |
| i40iw_get_addr_info(cm_node, &nfo); |
| if (cm_node->qhash_set) { |
| i40iw_manage_qhash(cm_node->iwdev, |
| &nfo, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, |
| NULL, |
| false); |
| cm_node->qhash_set = 0; |
| } |
| } |
| } |
| |
| iwqp = cm_node->iwqp; |
| if (iwqp) { |
| iwqp->cm_node = NULL; |
| i40iw_rem_ref(&iwqp->ibqp); |
| cm_node->iwqp = NULL; |
| } else if (cm_node->qhash_set) { |
| i40iw_get_addr_info(cm_node, &nfo); |
| i40iw_manage_qhash(cm_node->iwdev, |
| &nfo, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, |
| NULL, |
| false); |
| cm_node->qhash_set = 0; |
| } |
| |
| cm_node->cm_core->stats_nodes_destroyed++; |
| kfree(cm_node); |
| } |
| |
| /** |
| * i40iw_handle_fin_pkt - FIN packet received |
| * @cm_node: connection's node |
| */ |
| static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) |
| { |
| u32 ret; |
| |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_RCVD: |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_MPAREJ_RCVD: |
| cm_node->tcp_cntxt.rcv_nxt++; |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_LAST_ACK; |
| i40iw_send_fin(cm_node); |
| break; |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| cm_node->tcp_cntxt.rcv_nxt++; |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_FIN_WAIT1: |
| cm_node->tcp_cntxt.rcv_nxt++; |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSING; |
| i40iw_send_ack(cm_node); |
| /* |
| * Wait for ACK as this is simultaneous close. |
| * After we receive ACK, do not send anything. |
| * Just rm the node. |
| */ |
| break; |
| case I40IW_CM_STATE_FIN_WAIT2: |
| cm_node->tcp_cntxt.rcv_nxt++; |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_TIME_WAIT; |
| i40iw_send_ack(cm_node); |
| ret = |
| i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); |
| if (ret) |
| i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); |
| break; |
| case I40IW_CM_STATE_TIME_WAIT: |
| cm_node->tcp_cntxt.rcv_nxt++; |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| case I40IW_CM_STATE_OFFLOADED: |
| default: |
| i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_handle_rst_pkt - process received RST packet |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| i40iw_cleanup_retrans_entry(cm_node); |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| switch (cm_node->mpa_frame_rev) { |
| case IETF_MPA_V2: |
| cm_node->mpa_frame_rev = IETF_MPA_V1; |
| /* send a syn and goto syn sent state */ |
| cm_node->state = I40IW_CM_STATE_SYN_SENT; |
| if (i40iw_send_syn(cm_node, 0)) |
| i40iw_active_open_err(cm_node, false); |
| break; |
| case IETF_MPA_V1: |
| default: |
| i40iw_active_open_err(cm_node, false); |
| break; |
| } |
| break; |
| case I40IW_CM_STATE_MPAREQ_RCVD: |
| atomic_add_return(1, &cm_node->passive_state); |
| break; |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_SYN_RCVD: |
| case I40IW_CM_STATE_LISTENING: |
| i40iw_pr_err("Bad state state = %d\n", cm_node->state); |
| i40iw_passive_open_err(cm_node, false); |
| break; |
| case I40IW_CM_STATE_OFFLOADED: |
| i40iw_active_open_err(cm_node, false); |
| break; |
| case I40IW_CM_STATE_CLOSED: |
| break; |
| case I40IW_CM_STATE_FIN_WAIT2: |
| case I40IW_CM_STATE_FIN_WAIT1: |
| case I40IW_CM_STATE_LAST_ACK: |
| cm_node->cm_id->rem_ref(cm_node->cm_id); |
| case I40IW_CM_STATE_TIME_WAIT: |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| int ret; |
| int datasize = rbuf->datalen; |
| u8 *dataloc = rbuf->data; |
| |
| enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; |
| u32 res_type; |
| |
| ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); |
| if (ret) { |
| if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) |
| i40iw_active_open_err(cm_node, true); |
| else |
| i40iw_passive_open_err(cm_node, true); |
| return; |
| } |
| |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_ESTABLISHED: |
| if (res_type == I40IW_MPA_REQUEST_REJECT) |
| i40iw_pr_err("state for reject\n"); |
| cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; |
| type = I40IW_CM_EVENT_MPA_REQ; |
| i40iw_send_ack(cm_node); /* ACK received MPA request */ |
| atomic_set(&cm_node->passive_state, |
| I40IW_PASSIVE_STATE_INDICATED); |
| break; |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| i40iw_cleanup_retrans_entry(cm_node); |
| if (res_type == I40IW_MPA_REQUEST_REJECT) { |
| type = I40IW_CM_EVENT_MPA_REJECT; |
| cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; |
| } else { |
| type = I40IW_CM_EVENT_CONNECTED; |
| cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| i40iw_send_ack(cm_node); |
| } |
| break; |
| default: |
| pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); |
| break; |
| } |
| i40iw_create_event(cm_node, type); |
| } |
| |
| /** |
| * i40iw_indicate_pkt_err - Send up err event to cm |
| * @cm_node: connection's node |
| */ |
| static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) |
| { |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| i40iw_active_open_err(cm_node, true); |
| break; |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_SYN_RCVD: |
| i40iw_passive_open_err(cm_node, true); |
| break; |
| case I40IW_CM_STATE_OFFLOADED: |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_check_syn - Check for error on received syn ack |
| * @cm_node: connection's node |
| * @tcph: pointer tcp header |
| */ |
| static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
| { |
| int err = 0; |
| |
| if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { |
| err = 1; |
| i40iw_active_open_err(cm_node, true); |
| } |
| return err; |
| } |
| |
| /** |
| * i40iw_check_seq - check seq numbers if OK |
| * @cm_node: connection's node |
| * @tcph: pointer tcp header |
| */ |
| static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
| { |
| int err = 0; |
| u32 seq; |
| u32 ack_seq; |
| u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; |
| u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; |
| u32 rcv_wnd; |
| |
| seq = ntohl(tcph->seq); |
| ack_seq = ntohl(tcph->ack_seq); |
| rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| if (ack_seq != loc_seq_num) |
| err = -1; |
| else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) |
| err = -1; |
| if (err) { |
| i40iw_pr_err("seq number\n"); |
| i40iw_indicate_pkt_err(cm_node); |
| } |
| return err; |
| } |
| |
| /** |
| * i40iw_handle_syn_pkt - is for Passive node |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| int ret; |
| u32 inc_sequence; |
| int optionsize; |
| struct i40iw_cm_info nfo; |
| |
| optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| inc_sequence = ntohl(tcph->seq); |
| |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| /* Rcvd syn on active open connection */ |
| i40iw_active_open_err(cm_node, 1); |
| break; |
| case I40IW_CM_STATE_LISTENING: |
| /* Passive OPEN */ |
| if (atomic_read(&cm_node->listener->pend_accepts_cnt) > |
| cm_node->listener->backlog) { |
| cm_node->cm_core->stats_backlog_drops++; |
| i40iw_passive_open_err(cm_node, false); |
| break; |
| } |
| ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
| if (ret) { |
| i40iw_passive_open_err(cm_node, false); |
| /* drop pkt */ |
| break; |
| } |
| cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| cm_node->accept_pend = 1; |
| atomic_inc(&cm_node->listener->pend_accepts_cnt); |
| |
| cm_node->state = I40IW_CM_STATE_SYN_RCVD; |
| i40iw_get_addr_info(cm_node, &nfo); |
| ret = i40iw_manage_qhash(cm_node->iwdev, |
| &nfo, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_ADD, |
| (void *)cm_node, |
| false); |
| cm_node->qhash_set = true; |
| break; |
| case I40IW_CM_STATE_CLOSED: |
| i40iw_cleanup_retrans_entry(cm_node); |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_OFFLOADED: |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_FIN_WAIT1: |
| case I40IW_CM_STATE_FIN_WAIT2: |
| case I40IW_CM_STATE_MPAREQ_RCVD: |
| case I40IW_CM_STATE_LAST_ACK: |
| case I40IW_CM_STATE_CLOSING: |
| case I40IW_CM_STATE_UNKNOWN: |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| int ret; |
| u32 inc_sequence; |
| int optionsize; |
| |
| optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| inc_sequence = ntohl(tcph->seq); |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_SENT: |
| i40iw_cleanup_retrans_entry(cm_node); |
| /* active open */ |
| if (i40iw_check_syn(cm_node, tcph)) { |
| i40iw_pr_err("check syn fail\n"); |
| return; |
| } |
| cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| /* setup options */ |
| ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); |
| if (ret) { |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "cm_node=%p tcp_options failed\n", |
| cm_node); |
| break; |
| } |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| i40iw_send_ack(cm_node); /* ACK for the syn_ack */ |
| ret = i40iw_send_mpa_request(cm_node); |
| if (ret) { |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "cm_node=%p i40iw_send_mpa_request failed\n", |
| cm_node); |
| break; |
| } |
| cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; |
| break; |
| case I40IW_CM_STATE_MPAREQ_RCVD: |
| i40iw_passive_open_err(cm_node, true); |
| break; |
| case I40IW_CM_STATE_LISTENING: |
| cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_CLOSED: |
| cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
| i40iw_cleanup_retrans_entry(cm_node); |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_FIN_WAIT1: |
| case I40IW_CM_STATE_FIN_WAIT2: |
| case I40IW_CM_STATE_LAST_ACK: |
| case I40IW_CM_STATE_OFFLOADED: |
| case I40IW_CM_STATE_CLOSING: |
| case I40IW_CM_STATE_UNKNOWN: |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_handle_ack_pkt - process packet with ACK |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| u32 inc_sequence; |
| int ret = 0; |
| int optionsize; |
| u32 datasize = rbuf->datalen; |
| |
| optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| |
| if (i40iw_check_seq(cm_node, tcph)) |
| return -EINVAL; |
| |
| inc_sequence = ntohl(tcph->seq); |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_RCVD: |
| i40iw_cleanup_retrans_entry(cm_node); |
| ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
| if (ret) |
| break; |
| cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| cm_node->state = I40IW_CM_STATE_ESTABLISHED; |
| if (datasize) { |
| cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| i40iw_handle_rcv_mpa(cm_node, rbuf); |
| } |
| break; |
| case I40IW_CM_STATE_ESTABLISHED: |
| i40iw_cleanup_retrans_entry(cm_node); |
| if (datasize) { |
| cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| i40iw_handle_rcv_mpa(cm_node, rbuf); |
| } |
| break; |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| if (datasize) { |
| cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| i40iw_handle_rcv_mpa(cm_node, rbuf); |
| } |
| break; |
| case I40IW_CM_STATE_LISTENING: |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_CLOSED: |
| i40iw_cleanup_retrans_entry(cm_node); |
| atomic_inc(&cm_node->ref_count); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_LAST_ACK: |
| case I40IW_CM_STATE_CLOSING: |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| if (!cm_node->accept_pend) |
| cm_node->cm_id->rem_ref(cm_node->cm_id); |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| case I40IW_CM_STATE_FIN_WAIT1: |
| i40iw_cleanup_retrans_entry(cm_node); |
| cm_node->state = I40IW_CM_STATE_FIN_WAIT2; |
| break; |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_FIN_WAIT2: |
| case I40IW_CM_STATE_OFFLOADED: |
| case I40IW_CM_STATE_MPAREQ_RCVD: |
| case I40IW_CM_STATE_UNKNOWN: |
| default: |
| i40iw_cleanup_retrans_entry(cm_node); |
| break; |
| } |
| return ret; |
| } |
| |
| /** |
| * i40iw_process_packet - process cm packet |
| * @cm_node: connection's node |
| * @rbuf: receive buffer |
| */ |
| static void i40iw_process_packet(struct i40iw_cm_node *cm_node, |
| struct i40iw_puda_buf *rbuf) |
| { |
| enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; |
| struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| u32 fin_set = 0; |
| int ret; |
| |
| if (tcph->rst) { |
| pkt_type = I40IW_PKT_TYPE_RST; |
| } else if (tcph->syn) { |
| pkt_type = I40IW_PKT_TYPE_SYN; |
| if (tcph->ack) |
| pkt_type = I40IW_PKT_TYPE_SYNACK; |
| } else if (tcph->ack) { |
| pkt_type = I40IW_PKT_TYPE_ACK; |
| } |
| if (tcph->fin) |
| fin_set = 1; |
| |
| switch (pkt_type) { |
| case I40IW_PKT_TYPE_SYN: |
| i40iw_handle_syn_pkt(cm_node, rbuf); |
| break; |
| case I40IW_PKT_TYPE_SYNACK: |
| i40iw_handle_synack_pkt(cm_node, rbuf); |
| break; |
| case I40IW_PKT_TYPE_ACK: |
| ret = i40iw_handle_ack_pkt(cm_node, rbuf); |
| if (fin_set && !ret) |
| i40iw_handle_fin_pkt(cm_node); |
| break; |
| case I40IW_PKT_TYPE_RST: |
| i40iw_handle_rst_pkt(cm_node, rbuf); |
| break; |
| default: |
| if (fin_set && |
| (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) |
| i40iw_handle_fin_pkt(cm_node); |
| break; |
| } |
| } |
| |
| /** |
| * i40iw_make_listen_node - create a listen node with params |
| * @cm_core: cm's core |
| * @iwdev: iwarp device structure |
| * @cm_info: quad info for connection |
| */ |
| static struct i40iw_cm_listener *i40iw_make_listen_node( |
| struct i40iw_cm_core *cm_core, |
| struct i40iw_device *iwdev, |
| struct i40iw_cm_info *cm_info) |
| { |
| struct i40iw_cm_listener *listener; |
| unsigned long flags; |
| |
| /* cannot have multiple matching listeners */ |
| listener = i40iw_find_listener(cm_core, cm_info->loc_addr, |
| cm_info->loc_port, |
| cm_info->vlan_id, |
| I40IW_CM_LISTENER_EITHER_STATE); |
| if (listener && |
| (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { |
| atomic_dec(&listener->ref_count); |
| i40iw_debug(cm_core->dev, |
| I40IW_DEBUG_CM, |
| "Not creating listener since it already exists\n"); |
| return NULL; |
| } |
| |
| if (!listener) { |
| /* create a CM listen node (1/2 node to compare incoming traffic to) */ |
| listener = kzalloc(sizeof(*listener), GFP_ATOMIC); |
| if (!listener) |
| return NULL; |
| cm_core->stats_listen_nodes_created++; |
| memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); |
| listener->loc_port = cm_info->loc_port; |
| |
| INIT_LIST_HEAD(&listener->child_listen_list); |
| |
| atomic_set(&listener->ref_count, 1); |
| } else { |
| listener->reused_node = 1; |
| } |
| |
| listener->cm_id = cm_info->cm_id; |
| listener->ipv4 = cm_info->ipv4; |
| listener->vlan_id = cm_info->vlan_id; |
| atomic_set(&listener->pend_accepts_cnt, 0); |
| listener->cm_core = cm_core; |
| listener->iwdev = iwdev; |
| |
| listener->backlog = cm_info->backlog; |
| listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; |
| |
| if (!listener->reused_node) { |
| spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| list_add(&listener->list, &cm_core->listen_nodes); |
| spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| } |
| |
| return listener; |
| } |
| |
| /** |
| * i40iw_create_cm_node - make a connection node with params |
| * @cm_core: cm's core |
| * @iwdev: iwarp device structure |
| * @private_data_len: len to provate data for mpa request |
| * @private_data: pointer to private data for connection |
| * @cm_info: quad info for connection |
| */ |
| static struct i40iw_cm_node *i40iw_create_cm_node( |
| struct i40iw_cm_core *cm_core, |
| struct i40iw_device *iwdev, |
| u16 private_data_len, |
| void *private_data, |
| struct i40iw_cm_info *cm_info) |
| { |
| int ret; |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_cm_listener *loopback_remotelistener; |
| struct i40iw_cm_node *loopback_remotenode; |
| struct i40iw_cm_info loopback_cm_info; |
| |
| /* create a CM connection node */ |
| cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); |
| if (!cm_node) |
| return NULL; |
| /* set our node side to client (active) side */ |
| cm_node->tcp_cntxt.client = 1; |
| cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| |
| if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { |
| loopback_remotelistener = i40iw_find_listener( |
| cm_core, |
| cm_info->rem_addr, |
| cm_node->rem_port, |
| cm_node->vlan_id, |
| I40IW_CM_LISTENER_ACTIVE_STATE); |
| if (!loopback_remotelistener) { |
| i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| } else { |
| loopback_cm_info = *cm_info; |
| loopback_cm_info.loc_port = cm_info->rem_port; |
| loopback_cm_info.rem_port = cm_info->loc_port; |
| loopback_cm_info.cm_id = loopback_remotelistener->cm_id; |
| loopback_cm_info.ipv4 = cm_info->ipv4; |
| loopback_remotenode = i40iw_make_cm_node(cm_core, |
| iwdev, |
| &loopback_cm_info, |
| loopback_remotelistener); |
| if (!loopback_remotenode) { |
| i40iw_rem_ref_cm_node(cm_node); |
| return NULL; |
| } |
| cm_core->stats_loopbacks++; |
| loopback_remotenode->loopbackpartner = cm_node; |
| loopback_remotenode->tcp_cntxt.rcv_wscale = |
| I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| cm_node->loopbackpartner = loopback_remotenode; |
| memcpy(loopback_remotenode->pdata_buf, private_data, |
| private_data_len); |
| loopback_remotenode->pdata.size = private_data_len; |
| |
| cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| cm_node->tcp_cntxt.rcv_nxt = |
| loopback_remotenode->tcp_cntxt.loc_seq_num; |
| loopback_remotenode->tcp_cntxt.rcv_nxt = |
| cm_node->tcp_cntxt.loc_seq_num; |
| cm_node->tcp_cntxt.max_snd_wnd = |
| loopback_remotenode->tcp_cntxt.rcv_wnd; |
| loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; |
| loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; |
| loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; |
| loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD; |
| i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ); |
| } |
| return cm_node; |
| } |
| |
| cm_node->pdata.size = private_data_len; |
| cm_node->pdata.addr = cm_node->pdata_buf; |
| |
| memcpy(cm_node->pdata_buf, private_data, private_data_len); |
| |
| cm_node->state = I40IW_CM_STATE_SYN_SENT; |
| ret = i40iw_send_syn(cm_node, 0); |
| |
| if (ret) { |
| if (cm_node->ipv4) |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "Api - connect() FAILED: dest addr=%pI4", |
| cm_node->rem_addr); |
| else |
| i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, |
| "Api - connect() FAILED: dest addr=%pI6", |
| cm_node->rem_addr); |
| i40iw_rem_ref_cm_node(cm_node); |
| cm_node = NULL; |
| } |
| |
| if (cm_node) |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", |
| cm_node->rem_port, |
| cm_node, |
| cm_node->cm_id); |
| |
| return cm_node; |
| } |
| |
| /** |
| * i40iw_cm_reject - reject and teardown a connection |
| * @cm_node: connection's node |
| * @pdate: ptr to private data for reject |
| * @plen: size of private data |
| */ |
| static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) |
| { |
| int ret = 0; |
| int err; |
| int passive_state; |
| struct iw_cm_id *cm_id = cm_node->cm_id; |
| struct i40iw_cm_node *loopback = cm_node->loopbackpartner; |
| |
| if (cm_node->tcp_cntxt.client) |
| return ret; |
| i40iw_cleanup_retrans_entry(cm_node); |
| |
| if (!loopback) { |
| passive_state = atomic_add_return(1, &cm_node->passive_state); |
| if (passive_state == I40IW_SEND_RESET_EVENT) { |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| i40iw_rem_ref_cm_node(cm_node); |
| } else { |
| if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| i40iw_rem_ref_cm_node(cm_node); |
| } else { |
| ret = i40iw_send_mpa_reject(cm_node, pdata, plen); |
| if (ret) { |
| cm_node->state = I40IW_CM_STATE_CLOSED; |
| err = i40iw_send_reset(cm_node); |
| if (err) |
| i40iw_pr_err("send reset failed\n"); |
| } else { |
| cm_id->add_ref(cm_id); |
| } |
| } |
| } |
| } else { |
| cm_node->cm_id = NULL; |
| if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| i40iw_rem_ref_cm_node(cm_node); |
| i40iw_rem_ref_cm_node(loopback); |
| } else { |
| ret = i40iw_send_cm_event(loopback, |
| loopback->cm_id, |
| IW_CM_EVENT_CONNECT_REPLY, |
| -ECONNREFUSED); |
| i40iw_rem_ref_cm_node(cm_node); |
| loopback->state = I40IW_CM_STATE_CLOSING; |
| |
| cm_id = loopback->cm_id; |
| i40iw_rem_ref_cm_node(loopback); |
| cm_id->rem_ref(cm_id); |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * i40iw_cm_close - close of cm connection |
| * @cm_node: connection's node |
| */ |
| static int i40iw_cm_close(struct i40iw_cm_node *cm_node) |
| { |
| int ret = 0; |
| |
| if (!cm_node) |
| return -EINVAL; |
| |
| switch (cm_node->state) { |
| case I40IW_CM_STATE_SYN_RCVD: |
| case I40IW_CM_STATE_SYN_SENT: |
| case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: |
| case I40IW_CM_STATE_ESTABLISHED: |
| case I40IW_CM_STATE_ACCEPTING: |
| case I40IW_CM_STATE_MPAREQ_SENT: |
| case I40IW_CM_STATE_MPAREQ_RCVD: |
| i40iw_cleanup_retrans_entry(cm_node); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_CLOSE_WAIT: |
| cm_node->state = I40IW_CM_STATE_LAST_ACK; |
| i40iw_send_fin(cm_node); |
| break; |
| case I40IW_CM_STATE_FIN_WAIT1: |
| case I40IW_CM_STATE_FIN_WAIT2: |
| case I40IW_CM_STATE_LAST_ACK: |
| case I40IW_CM_STATE_TIME_WAIT: |
| case I40IW_CM_STATE_CLOSING: |
| ret = -1; |
| break; |
| case I40IW_CM_STATE_LISTENING: |
| i40iw_cleanup_retrans_entry(cm_node); |
| i40iw_send_reset(cm_node); |
| break; |
| case I40IW_CM_STATE_MPAREJ_RCVD: |
| case I40IW_CM_STATE_UNKNOWN: |
| case I40IW_CM_STATE_INITED: |
| case I40IW_CM_STATE_CLOSED: |
| case I40IW_CM_STATE_LISTENER_DESTROYED: |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| case I40IW_CM_STATE_OFFLOADED: |
| if (cm_node->send_entry) |
| i40iw_pr_err("send_entry\n"); |
| i40iw_rem_ref_cm_node(cm_node); |
| break; |
| } |
| return ret; |
| } |
| |
| /** |
| * i40iw_receive_ilq - recv an ETHERNET packet, and process it |
| * through CM |
| * @dev: FPK dev struct |
| * @rbuf: receive buffer |
| */ |
| void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf) |
| { |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_cm_listener *listener; |
| struct iphdr *iph; |
| struct ipv6hdr *ip6h; |
| struct tcphdr *tcph; |
| struct i40iw_cm_info cm_info; |
| struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; |
| struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| struct vlan_ethhdr *ethh; |
| |
| /* if vlan, then maclen = 18 else 14 */ |
| iph = (struct iphdr *)rbuf->iph; |
| memset(&cm_info, 0, sizeof(cm_info)); |
| |
| i40iw_debug_buf(dev, |
| I40IW_DEBUG_ILQ, |
| "RECEIVE ILQ BUFFER", |
| rbuf->mem.va, |
| rbuf->totallen); |
| ethh = (struct vlan_ethhdr *)rbuf->mem.va; |
| |
| if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { |
| cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK; |
| i40iw_debug(cm_core->dev, |
| I40IW_DEBUG_CM, |
| "%s vlan_id=%d\n", |
| __func__, |
| cm_info.vlan_id); |
| } else { |
| cm_info.vlan_id = I40IW_NO_VLAN; |
| } |
| tcph = (struct tcphdr *)rbuf->tcph; |
| |
| if (rbuf->ipv4) { |
| cm_info.loc_addr[0] = ntohl(iph->daddr); |
| cm_info.rem_addr[0] = ntohl(iph->saddr); |
| cm_info.ipv4 = true; |
| } else { |
| ip6h = (struct ipv6hdr *)rbuf->iph; |
| i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| ip6h->daddr.in6_u.u6_addr32); |
| i40iw_copy_ip_ntohl(cm_info.rem_addr, |
| ip6h->saddr.in6_u.u6_addr32); |
| cm_info.ipv4 = false; |
| } |
| cm_info.loc_port = ntohs(tcph->dest); |
| cm_info.rem_port = ntohs(tcph->source); |
| cm_node = i40iw_find_node(cm_core, |
| cm_info.rem_port, |
| cm_info.rem_addr, |
| cm_info.loc_port, |
| cm_info.loc_addr, |
| true); |
| |
| if (!cm_node) { |
| /* Only type of packet accepted are for */ |
| /* the PASSIVE open (syn only) */ |
| if (!tcph->syn || tcph->ack) |
| return; |
| listener = |
| i40iw_find_listener(cm_core, |
| cm_info.loc_addr, |
| cm_info.loc_port, |
| cm_info.vlan_id, |
| I40IW_CM_LISTENER_ACTIVE_STATE); |
| if (!listener) { |
| cm_info.cm_id = NULL; |
| i40iw_debug(cm_core->dev, |
| I40IW_DEBUG_CM, |
| "%s no listener found\n", |
| __func__); |
| return; |
| } |
| cm_info.cm_id = listener->cm_id; |
| cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); |
| if (!cm_node) { |
| i40iw_debug(cm_core->dev, |
| I40IW_DEBUG_CM, |
| "%s allocate node failed\n", |
| __func__); |
| atomic_dec(&listener->ref_count); |
| return; |
| } |
| if (!tcph->rst && !tcph->fin) { |
| cm_node->state = I40IW_CM_STATE_LISTENING; |
| } else { |
| i40iw_rem_ref_cm_node(cm_node); |
| return; |
| } |
| atomic_inc(&cm_node->ref_count); |
| } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { |
| i40iw_rem_ref_cm_node(cm_node); |
| return; |
| } |
| i40iw_process_packet(cm_node, rbuf); |
| i40iw_rem_ref_cm_node(cm_node); |
| } |
| |
| /** |
| * i40iw_setup_cm_core - allocate a top level instance of a cm |
| * core |
| * @iwdev: iwarp device structure |
| */ |
| void i40iw_setup_cm_core(struct i40iw_device *iwdev) |
| { |
| struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| |
| cm_core->iwdev = iwdev; |
| cm_core->dev = &iwdev->sc_dev; |
| |
| INIT_LIST_HEAD(&cm_core->connected_nodes); |
| INIT_LIST_HEAD(&cm_core->listen_nodes); |
| |
| init_timer(&cm_core->tcp_timer); |
| cm_core->tcp_timer.function = i40iw_cm_timer_tick; |
| cm_core->tcp_timer.data = (unsigned long)cm_core; |
| |
| spin_lock_init(&cm_core->ht_lock); |
| spin_lock_init(&cm_core->listen_list_lock); |
| |
| cm_core->event_wq = create_singlethread_workqueue("iwewq"); |
| cm_core->disconn_wq = create_singlethread_workqueue("iwdwq"); |
| } |
| |
| /** |
| * i40iw_cleanup_cm_core - deallocate a top level instance of a |
| * cm core |
| * @cm_core: cm's core |
| */ |
| void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) |
| { |
| unsigned long flags; |
| |
| if (!cm_core) |
| return; |
| |
| spin_lock_irqsave(&cm_core->ht_lock, flags); |
| if (timer_pending(&cm_core->tcp_timer)) |
| del_timer_sync(&cm_core->tcp_timer); |
| spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| |
| destroy_workqueue(cm_core->event_wq); |
| destroy_workqueue(cm_core->disconn_wq); |
| } |
| |
| /** |
| * i40iw_init_tcp_ctx - setup qp context |
| * @cm_node: connection's node |
| * @tcp_info: offload info for tcp |
| * @iwqp: associate qp for the connection |
| */ |
| static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, |
| struct i40iw_tcp_offload_info *tcp_info, |
| struct i40iw_qp *iwqp) |
| { |
| tcp_info->ipv4 = cm_node->ipv4; |
| tcp_info->drop_ooo_seg = true; |
| tcp_info->wscale = true; |
| tcp_info->ignore_tcp_opt = true; |
| tcp_info->ignore_tcp_uns_opt = true; |
| tcp_info->no_nagle = false; |
| |
| tcp_info->ttl = I40IW_DEFAULT_TTL; |
| tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); |
| tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); |
| tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; |
| |
| tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
| tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; |
| tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; |
| |
| tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); |
| tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| |
| tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); |
| tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); |
| tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << |
| cm_node->tcp_cntxt.rcv_wscale); |
| |
| tcp_info->flow_label = 0; |
| tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); |
| if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| tcp_info->insert_vlan_tag = true; |
| tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id); |
| } |
| if (cm_node->ipv4) { |
| tcp_info->src_port = cpu_to_le16(cm_node->loc_port); |
| tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); |
| |
| tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]); |
| tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]); |
| tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev, |
| &tcp_info->dest_ip_addr3, |
| true, |
| NULL, |
| I40IW_ARP_RESOLVE)); |
| } else { |
| tcp_info->src_port = cpu_to_le16(cm_node->loc_port); |
| tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); |
| tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]); |
| tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]); |
| tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]); |
| tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]); |
| tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]); |
| tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]); |
| tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]); |
| tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]); |
| tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table( |
| iwqp->iwdev, |
| &tcp_info->dest_ip_addr0, |
| false, |
| NULL, |
| I40IW_ARP_RESOLVE)); |
| } |
| } |
| |
| /** |
| * i40iw_cm_init_tsa_conn - setup qp for RTS |
| * @iwqp: associate qp for the connection |
| * @cm_node: connection's node |
| */ |
| static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, |
| struct i40iw_cm_node *cm_node) |
| { |
| struct i40iw_tcp_offload_info tcp_info; |
| struct i40iwarp_offload_info *iwarp_info; |
| struct i40iw_qp_host_ctx_info *ctx_info; |
| struct i40iw_device *iwdev = iwqp->iwdev; |
| struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; |
| |
| memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); |
| iwarp_info = &iwqp->iwarp_info; |
| ctx_info = &iwqp->ctx_info; |
| |
| ctx_info->tcp_info = &tcp_info; |
| ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; |
| ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; |
| |
| iwarp_info->ord_size = cm_node->ord_size; |
| iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); |
| |
| if (iwarp_info->ord_size == 1) |
| iwarp_info->ord_size = 2; |
| |
| iwarp_info->rd_enable = true; |
| iwarp_info->rdmap_ver = 1; |
| iwarp_info->ddp_ver = 1; |
| |
| iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; |
| |
| ctx_info->tcp_info_valid = true; |
| ctx_info->iwarp_info_valid = true; |
| |
| i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); |
| if (cm_node->snd_mark_en) { |
| iwarp_info->snd_mark_en = true; |
| iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & |
| SNDMARKER_SEQNMASK) + cm_node->lsmm_size; |
| } |
| |
| cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
| tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; |
| |
| dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); |
| |
| /* once tcp_info is set, no need to do it again */ |
| ctx_info->tcp_info_valid = false; |
| ctx_info->iwarp_info_valid = false; |
| } |
| |
| /** |
| * i40iw_cm_disconn - when a connection is being closed |
| * @iwqp: associate qp for the connection |
| */ |
| int i40iw_cm_disconn(struct i40iw_qp *iwqp) |
| { |
| struct disconn_work *work; |
| struct i40iw_device *iwdev = iwqp->iwdev; |
| struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| |
| work = kzalloc(sizeof(*work), GFP_ATOMIC); |
| if (!work) |
| return -ENOMEM; /* Timer will clean up */ |
| |
| i40iw_add_ref(&iwqp->ibqp); |
| work->iwqp = iwqp; |
| INIT_WORK(&work->work, i40iw_disconnect_worker); |
| queue_work(cm_core->disconn_wq, &work->work); |
| return 0; |
| } |
| |
| /** |
| * i40iw_loopback_nop - Send a nop |
| * @qp: associated hw qp |
| */ |
| static void i40iw_loopback_nop(struct i40iw_sc_qp *qp) |
| { |
| u64 *wqe; |
| u64 header; |
| |
| wqe = qp->qp_uk.sq_base->elem; |
| set_64bit_val(wqe, 0, 0); |
| set_64bit_val(wqe, 8, 0); |
| set_64bit_val(wqe, 16, 0); |
| |
| header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) | |
| LS_64(0, I40IWQPSQ_SIGCOMPL) | |
| LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID); |
| set_64bit_val(wqe, 24, header); |
| } |
| |
| /** |
| * i40iw_qp_disconnect - free qp and close cm |
| * @iwqp: associate qp for the connection |
| */ |
| static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) |
| { |
| struct i40iw_device *iwdev; |
| struct i40iw_ib_device *iwibdev; |
| |
| iwdev = to_iwdev(iwqp->ibqp.device); |
| if (!iwdev) { |
| i40iw_pr_err("iwdev == NULL\n"); |
| return; |
| } |
| |
| iwibdev = iwdev->iwibdev; |
| |
| if (iwqp->active_conn) { |
| /* indicate this connection is NOT active */ |
| iwqp->active_conn = 0; |
| } else { |
| /* Need to free the Last Streaming Mode Message */ |
| if (iwqp->ietf_mem.va) { |
| if (iwqp->lsmm_mr) |
| iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr); |
| i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); |
| } |
| } |
| |
| /* close the CM node down if it is still active */ |
| if (iwqp->cm_node) { |
| i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); |
| i40iw_cm_close(iwqp->cm_node); |
| } |
| } |
| |
| /** |
| * i40iw_cm_disconn_true - called by worker thread to disconnect qp |
| * @iwqp: associate qp for the connection |
| */ |
| static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) |
| { |
| struct iw_cm_id *cm_id; |
| struct i40iw_device *iwdev; |
| struct i40iw_sc_qp *qp = &iwqp->sc_qp; |
| u16 last_ae; |
| u8 original_hw_tcp_state; |
| u8 original_ibqp_state; |
| int disconn_status = 0; |
| int issue_disconn = 0; |
| int issue_close = 0; |
| int issue_flush = 0; |
| struct ib_event ibevent; |
| unsigned long flags; |
| int ret; |
| |
| if (!iwqp) { |
| i40iw_pr_err("iwqp == NULL\n"); |
| return; |
| } |
| |
| spin_lock_irqsave(&iwqp->lock, flags); |
| cm_id = iwqp->cm_id; |
| /* make sure we havent already closed this connection */ |
| if (!cm_id) { |
| spin_unlock_irqrestore(&iwqp->lock, flags); |
| return; |
| } |
| |
| iwdev = to_iwdev(iwqp->ibqp.device); |
| |
| original_hw_tcp_state = iwqp->hw_tcp_state; |
| original_ibqp_state = iwqp->ibqp_state; |
| last_ae = iwqp->last_aeq; |
| |
| if (qp->term_flags) { |
| issue_disconn = 1; |
| issue_close = 1; |
| iwqp->cm_id = NULL; |
| /*When term timer expires after cm_timer, don't want |
| *terminate-handler to issue cm_disconn which can re-free |
| *a QP even after its refcnt=0. |
| */ |
| del_timer(&iwqp->terminate_timer); |
| if (!iwqp->flush_issued) { |
| iwqp->flush_issued = 1; |
| issue_flush = 1; |
| } |
| } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || |
| ((original_ibqp_state == IB_QPS_RTS) && |
| (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { |
| issue_disconn = 1; |
| if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) |
| disconn_status = -ECONNRESET; |
| } |
| |
| if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || |
| (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || |
| (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || |
| (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { |
| issue_close = 1; |
| iwqp->cm_id = NULL; |
| if (!iwqp->flush_issued) { |
| iwqp->flush_issued = 1; |
| issue_flush = 1; |
| } |
| } |
| |
| spin_unlock_irqrestore(&iwqp->lock, flags); |
| if (issue_flush && !iwqp->destroyed) { |
| /* Flush the queues */ |
| i40iw_flush_wqes(iwdev, iwqp); |
| |
| if (qp->term_flags) { |
| ibevent.device = iwqp->ibqp.device; |
| ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? |
| IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; |
| ibevent.element.qp = &iwqp->ibqp; |
| iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); |
| } |
| } |
| |
| if (cm_id && cm_id->event_handler) { |
| if (issue_disconn) { |
| ret = i40iw_send_cm_event(NULL, |
| cm_id, |
| IW_CM_EVENT_DISCONNECT, |
| disconn_status); |
| |
| if (ret) |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "disconnect event failed %s: - cm_id = %p\n", |
| __func__, cm_id); |
| } |
| if (issue_close) { |
| i40iw_qp_disconnect(iwqp); |
| cm_id->provider_data = iwqp; |
| ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); |
| if (ret) |
| i40iw_debug(&iwdev->sc_dev, |
| I40IW_DEBUG_CM, |
| "close event failed %s: - cm_id = %p\n", |
| __func__, cm_id); |
| cm_id->rem_ref(cm_id); |
| } |
| } |
| } |
| |
| /** |
| * i40iw_disconnect_worker - worker for connection close |
| * @work: points or disconn structure |
| */ |
| static void i40iw_disconnect_worker(struct work_struct *work) |
| { |
| struct disconn_work *dwork = container_of(work, struct disconn_work, work); |
| struct i40iw_qp *iwqp = dwork->iwqp; |
| |
| kfree(dwork); |
| i40iw_cm_disconn_true(iwqp); |
| i40iw_rem_ref(&iwqp->ibqp); |
| } |
| |
| /** |
| * i40iw_accept - registered call for connection to be accepted |
| * @cm_id: cm information for passive connection |
| * @conn_param: accpet parameters |
| */ |
| int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| { |
| struct ib_qp *ibqp; |
| struct i40iw_qp *iwqp; |
| struct i40iw_device *iwdev; |
| struct i40iw_sc_dev *dev; |
| struct i40iw_cm_node *cm_node; |
| struct ib_qp_attr attr; |
| int passive_state; |
| struct i40iw_ib_device *iwibdev; |
| struct ib_mr *ibmr; |
| struct i40iw_pd *iwpd; |
| u16 buf_len = 0; |
| struct i40iw_kmem_info accept; |
| enum i40iw_status_code status; |
| u64 tagged_offset; |
| |
| memset(&attr, 0, sizeof(attr)); |
| ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
| if (!ibqp) |
| return -EINVAL; |
| |
| iwqp = to_iwqp(ibqp); |
| iwdev = iwqp->iwdev; |
| dev = &iwdev->sc_dev; |
| cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
| |
| if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { |
| cm_node->ipv4 = true; |
| cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); |
| } else { |
| cm_node->ipv4 = false; |
| i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL); |
| } |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "Accept vlan_id=%d\n", |
| cm_node->vlan_id); |
| if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| if (cm_node->loopbackpartner) |
| i40iw_rem_ref_cm_node(cm_node->loopbackpartner); |
| i40iw_rem_ref_cm_node(cm_node); |
| return -EINVAL; |
| } |
| |
| passive_state = atomic_add_return(1, &cm_node->passive_state); |
| if (passive_state == I40IW_SEND_RESET_EVENT) { |
| i40iw_rem_ref_cm_node(cm_node); |
| return -ECONNRESET; |
| } |
| |
| cm_node->cm_core->stats_accepts++; |
| iwqp->cm_node = (void *)cm_node; |
| cm_node->iwqp = iwqp; |
| |
| buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN; |
| |
| status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); |
| |
| if (status) |
| return -ENOMEM; |
| cm_node->pdata.size = conn_param->private_data_len; |
| accept.addr = iwqp->ietf_mem.va; |
| accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); |
| memcpy(accept.addr + accept.size, conn_param->private_data, |
| conn_param->private_data_len); |
| |
| /* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
| if ((cm_node->ipv4 && |
| !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
| (!cm_node->ipv4 && |
| !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { |
| iwibdev = iwdev->iwibdev; |
| iwpd = iwqp->iwpd; |
| tagged_offset = (uintptr_t)iwqp->ietf_mem.va; |
| ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, |
| iwqp->ietf_mem.pa, |
| buf_len, |
| IB_ACCESS_LOCAL_WRITE, |
| &tagged_offset); |
| if (IS_ERR(ibmr)) { |
| i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); |
| return -ENOMEM; |
| } |
| |
| ibmr->pd = &iwpd->ibpd; |
| ibmr->device = iwpd->ibpd.device; |
| iwqp->lsmm_mr = ibmr; |
| if (iwqp->page) |
| iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| if (is_remote_ne020_or_chelsio(cm_node)) |
| dev->iw_priv_qp_ops->qp_send_lsmm( |
| &iwqp->sc_qp, |
| iwqp->ietf_mem.va, |
| (accept.size + conn_param->private_data_len), |
| ibmr->lkey); |
| else |
| dev->iw_priv_qp_ops->qp_send_lsmm( |
| &iwqp->sc_qp, |
| iwqp->ietf_mem.va, |
| (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN), |
| ibmr->lkey); |
| |
| } else { |
| if (iwqp->page) |
| iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| i40iw_loopback_nop(&iwqp->sc_qp); |
| } |
| |
| if (iwqp->page) |
| kunmap(iwqp->page); |
| |
| iwqp->cm_id = cm_id; |
| cm_node->cm_id = cm_id; |
| |
| cm_id->provider_data = (void *)iwqp; |
| iwqp->active_conn = 0; |
| |
| cm_node->lsmm_size = accept.size + conn_param->private_data_len; |
| i40iw_cm_init_tsa_conn(iwqp, cm_node); |
| cm_id->add_ref(cm_id); |
| i40iw_add_ref(&iwqp->ibqp); |
| |
| i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); |
| |
| attr.qp_state = IB_QPS_RTS; |
| cm_node->qhash_set = false; |
| i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
| if (cm_node->loopbackpartner) { |
| cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; |
| |
| /* copy entire MPA frame to our cm_node's frame */ |
| memcpy(cm_node->loopbackpartner->pdata_buf, |
| conn_param->private_data, |
| conn_param->private_data_len); |
| i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); |
| } |
| |
| cm_node->accelerated = 1; |
| if (cm_node->accept_pend) { |
| if (!cm_node->listener) |
| i40iw_pr_err("cm_node->listener NULL for passive node\n"); |
| atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| cm_node->accept_pend = 0; |
| } |
| return 0; |
| } |
| |
| /** |
| * i40iw_reject - registered call for connection to be rejected |
| * @cm_id: cm information for passive connection |
| * @pdata: private data to be sent |
| * @pdata_len: private data length |
| */ |
| int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
| { |
| struct i40iw_device *iwdev; |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_cm_node *loopback; |
| |
| cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
| loopback = cm_node->loopbackpartner; |
| cm_node->cm_id = cm_id; |
| cm_node->pdata.size = pdata_len; |
| |
| iwdev = to_iwdev(cm_id->device); |
| if (!iwdev) |
| return -EINVAL; |
| cm_node->cm_core->stats_rejects++; |
| |
| if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) |
| return -EINVAL; |
| |
| if (loopback) { |
| memcpy(&loopback->pdata_buf, pdata, pdata_len); |
| loopback->pdata.size = pdata_len; |
| } |
| |
| return i40iw_cm_reject(cm_node, pdata, pdata_len); |
| } |
| |
| /** |
| * i40iw_connect - registered call for connection to be established |
| * @cm_id: cm information for passive connection |
| * @conn_param: Information about the connection |
| */ |
| int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| { |
| struct ib_qp *ibqp; |
| struct i40iw_qp *iwqp; |
| struct i40iw_device *iwdev; |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_cm_info cm_info; |
| struct sockaddr_in *laddr; |
| struct sockaddr_in *raddr; |
| struct sockaddr_in6 *laddr6; |
| struct sockaddr_in6 *raddr6; |
| int apbvt_set = 0; |
| enum i40iw_status_code status; |
| |
| ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
| if (!ibqp) |
| return -EINVAL; |
| iwqp = to_iwqp(ibqp); |
| if (!iwqp) |
| return -EINVAL; |
| iwdev = to_iwdev(iwqp->ibqp.device); |
| if (!iwdev) |
| return -EINVAL; |
| |
| laddr = (struct sockaddr_in *)&cm_id->m_local_addr; |
| raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; |
| laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; |
| raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; |
| |
| if (!(laddr->sin_port) || !(raddr->sin_port)) |
| return -EINVAL; |
| |
| iwqp->active_conn = 1; |
| iwqp->cm_id = NULL; |
| cm_id->provider_data = iwqp; |
| |
| /* set up the connection params for the node */ |
| if (cm_id->remote_addr.ss_family == AF_INET) { |
| cm_info.ipv4 = true; |
| memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); |
| memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); |
| cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
| cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); |
| cm_info.loc_port = ntohs(laddr->sin_port); |
| cm_info.rem_port = ntohs(raddr->sin_port); |
| cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
| } else { |
| cm_info.ipv4 = false; |
| i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| laddr6->sin6_addr.in6_u.u6_addr32); |
| i40iw_copy_ip_ntohl(cm_info.rem_addr, |
| raddr6->sin6_addr.in6_u.u6_addr32); |
| cm_info.loc_port = ntohs(laddr6->sin6_port); |
| cm_info.rem_port = ntohs(raddr6->sin6_port); |
| i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); |
| } |
| cm_info.cm_id = cm_id; |
| if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || |
| (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, |
| raddr6->sin6_addr.in6_u.u6_addr32, |
| sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { |
| status = i40iw_manage_qhash(iwdev, |
| &cm_info, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_ADD, |
| NULL, |
| true); |
| if (status) |
| return -EINVAL; |
| } |
| status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD); |
| if (status) { |
| i40iw_manage_qhash(iwdev, |
| &cm_info, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, |
| NULL, |
| false); |
| return -EINVAL; |
| } |
| |
| apbvt_set = 1; |
| cm_id->add_ref(cm_id); |
| cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, |
| conn_param->private_data_len, |
| (void *)conn_param->private_data, |
| &cm_info); |
| if (!cm_node) { |
| i40iw_manage_qhash(iwdev, |
| &cm_info, |
| I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| I40IW_QHASH_MANAGE_TYPE_DELETE, |
| NULL, |
| false); |
| |
| if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core, |
| cm_info.loc_port)) |
| i40iw_manage_apbvt(iwdev, |
| cm_info.loc_port, |
| I40IW_MANAGE_APBVT_DEL); |
| cm_id->rem_ref(cm_id); |
| iwdev->cm_core.stats_connect_errs++; |
| return -ENOMEM; |
| } |
| |
| i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord); |
| if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO && |
| !cm_node->ord_size) |
| cm_node->ord_size = 1; |
| |
| cm_node->apbvt_set = apbvt_set; |
| cm_node->qhash_set = true; |
| iwqp->cm_node = cm_node; |
| cm_node->iwqp = iwqp; |
| iwqp->cm_id = cm_id; |
| i40iw_add_ref(&iwqp->ibqp); |
| return 0; |
| } |
| |
| /** |
| * i40iw_create_listen - registered call creating listener |
| * @cm_id: cm information for passive connection |
| * @backlog: to max accept pending count |
| */ |
| int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) |
| { |
| struct i40iw_device *iwdev; |
| struct i40iw_cm_listener *cm_listen_node; |
| struct i40iw_cm_info cm_info; |
| enum i40iw_status_code ret; |
| struct sockaddr_in *laddr; |
| struct sockaddr_in6 *laddr6; |
| bool wildcard = false; |
| |
| iwdev = to_iwdev(cm_id->device); |
| if (!iwdev) |
| return -EINVAL; |
| |
| laddr = (struct sockaddr_in *)&cm_id->m_local_addr; |
| laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; |
| memset(&cm_info, 0, sizeof(cm_info)); |
| if (laddr->sin_family == AF_INET) { |
| cm_info.ipv4 = true; |
| cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
| cm_info.loc_port = ntohs(laddr->sin_port); |
| |
| if (laddr->sin_addr.s_addr != INADDR_ANY) |
| cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
| else |
| wildcard = true; |
| |
| } else { |
| cm_info.ipv4 = false; |
| i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| laddr6->sin6_addr.in6_u.u6_addr32); |
| cm_info.loc_port = ntohs(laddr6->sin6_port); |
| if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) |
| i40iw_netdev_vlan_ipv6(cm_info.loc_addr, |
| &cm_info.vlan_id, |
| NULL); |
| else |
| wildcard = true; |
| } |
| cm_info.backlog = backlog; |
| cm_info.cm_id = cm_id; |
| |
| cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); |
| if (!cm_listen_node) { |
| i40iw_pr_err("cm_listen_node == NULL\n"); |
| return -ENOMEM; |
| } |
| |
| cm_id->provider_data = cm_listen_node; |
| |
| if (!cm_listen_node->reused_node) { |
| if (wildcard) { |
| if (cm_info.ipv4) |
| ret = i40iw_add_mqh_4(iwdev, |
| &cm_info, |
| cm_listen_node); |
| else |
| ret = i40iw_add_mqh_6(iwdev, |
| &cm_info, |
| cm_listen_node); |
| if (ret) |
| goto error; |
| |
| ret = i40iw_manage_apbvt(iwdev, |
| cm_info.loc_port, |
| I40IW_MANAGE_APBVT_ADD); |
| |
| if (ret) |
| goto error; |
| } else { |
| ret = i40iw_manage_qhash(iwdev, |
| &cm_info, |
| I40IW_QHASH_TYPE_TCP_SYN, |
| I40IW_QHASH_MANAGE_TYPE_ADD, |
| NULL, |
| true); |
| if (ret) |
| goto error; |
| cm_listen_node->qhash_set = true; |
| ret = i40iw_manage_apbvt(iwdev, |
| cm_info.loc_port, |
| I40IW_MANAGE_APBVT_ADD); |
| if (ret) |
| goto error; |
| } |
| } |
| cm_id->add_ref(cm_id); |
| cm_listen_node->cm_core->stats_listen_created++; |
| return 0; |
| error: |
| i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); |
| return -EINVAL; |
| } |
| |
| /** |
| * i40iw_destroy_listen - registered call to destroy listener |
| * @cm_id: cm information for passive connection |
| */ |
| int i40iw_destroy_listen(struct iw_cm_id *cm_id) |
| { |
| struct i40iw_device *iwdev; |
| |
| iwdev = to_iwdev(cm_id->device); |
| if (cm_id->provider_data) |
| i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); |
| else |
| i40iw_pr_err("cm_id->provider_data was NULL\n"); |
| |
| cm_id->rem_ref(cm_id); |
| |
| return 0; |
| } |
| |
| /** |
| * i40iw_cm_event_connected - handle connected active node |
| * @event: the info for cm_node of connection |
| */ |
| static void i40iw_cm_event_connected(struct i40iw_cm_event *event) |
| { |
| struct i40iw_qp *iwqp; |
| struct i40iw_device *iwdev; |
| struct i40iw_cm_node *cm_node; |
| struct i40iw_sc_dev *dev; |
| struct ib_qp_attr attr; |
| struct iw_cm_id *cm_id; |
| int status; |
| bool read0; |
| |
| cm_node = event->cm_node; |
| cm_id = cm_node->cm_id; |
| iwqp = (struct i40iw_qp *)cm_id->provider_data; |
| iwdev = to_iwdev(iwqp->ibqp.device); |
| dev = &iwdev->sc_dev; |
| |
| if (iwqp->destroyed) { |
| status = -ETIMEDOUT; |
| goto error; |
| } |
| i40iw_cm_init_tsa_conn(iwqp, cm_node); |
| read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); |
| if (iwqp->page) |
| iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); |
| if (iwqp->page) |
| kunmap(iwqp->page); |
| status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); |
| if (status) |
| i40iw_pr_err("send cm event\n"); |
| |
| memset(&attr, 0, sizeof(attr)); |
| attr.qp_state = IB_QPS_RTS; |
| cm_node->qhash_set = false; |
| i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
| |
| cm_node->accelerated = 1; |
| if (cm_node->accept_pend) { |
| if (!cm_node->listener) |
| i40iw_pr_err("listener is null for passive node\n"); |
| atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| cm_node->accept_pend = 0; |
| } |
| return; |
| |
| error: |
| iwqp->cm_id = NULL; |
| cm_id->provider_data = NULL; |
| i40iw_send_cm_event(event->cm_node, |
| cm_id, |
| IW_CM_EVENT_CONNECT_REPLY, |
| status); |
| cm_id->rem_ref(cm_id); |
| i40iw_rem_ref_cm_node(event->cm_node); |
| } |
| |
| /** |
| * i40iw_cm_event_reset - handle reset |
| * @event: the info for cm_node of connection |
| */ |
| static void i40iw_cm_event_reset(struct i40iw_cm_event *event) |
| { |
| struct i40iw_cm_node *cm_node = event->cm_node; |
| struct iw_cm_id *cm_id = cm_node->cm_id; |
| struct i40iw_qp *iwqp; |
| |
| if (!cm_id) |
| return; |
| |
| iwqp = cm_id->provider_data; |
| if (!iwqp) |
| return; |
| |
| i40iw_debug(cm_node->dev, |
| I40IW_DEBUG_CM, |
| "reset event %p - cm_id = %p\n", |
| event->cm_node, cm_id); |
| iwqp->cm_id = NULL; |
| |
| i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); |
| i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); |
| } |
| |
| /** |
| * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer |
| * @work: pointer of cm event info. |
| */ |
| static void i40iw_cm_event_handler(struct work_struct *work) |
| { |
| struct i40iw_cm_event *event = container_of(work, |
| struct i40iw_cm_event, |
| event_work); |
| struct i40iw_cm_node *cm_node; |
| |
| if (!event || !event->cm_node || !event->cm_node->cm_core) |
| return; |
| |
| cm_node = event->cm_node; |
| |
| switch (event->type) { |
| case I40IW_CM_EVENT_MPA_REQ: |
| i40iw_send_cm_event(cm_node, |
| cm_node->cm_id, |
| IW_CM_EVENT_CONNECT_REQUEST, |
| 0); |
| break; |
| case I40IW_CM_EVENT_RESET: |
| i40iw_cm_event_reset(event); |
| break; |
| case I40IW_CM_EVENT_CONNECTED: |
| if (!event->cm_node->cm_id || |
| (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) |
| break; |
| i40iw_cm_event_connected(event); |
| break; |
| case I40IW_CM_EVENT_MPA_REJECT: |
| if (!event->cm_node->cm_id || |
| (cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
| break; |
| i40iw_send_cm_event(cm_node, |
| cm_node->cm_id, |
| IW_CM_EVENT_CONNECT_REPLY, |
| -ECONNREFUSED); |
| break; |
| case I40IW_CM_EVENT_ABORTED: |
| if (!event->cm_node->cm_id || |
| (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
| break; |
| i40iw_event_connect_error(event); |
| break; |
| default: |
| i40iw_pr_err("event type = %d\n", event->type); |
| break; |
| } |
| |
| event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); |
| i40iw_rem_ref_cm_node(event->cm_node); |
| kfree(event); |
| } |
| |
| /** |
| * i40iw_cm_post_event - queue event request for worker thread |
| * @event: cm node's info for up event call |
| */ |
| static void i40iw_cm_post_event(struct i40iw_cm_event *event) |
| { |
| atomic_inc(&event->cm_node->ref_count); |
| event->cm_info.cm_id->add_ref(event->cm_info.cm_id); |
| INIT_WORK(&event->event_work, i40iw_cm_event_handler); |
| |
| queue_work(event->cm_node->cm_core->event_wq, &event->event_work); |
| } |