diff options
Diffstat (limited to 'drivers/infiniband/hw/i40iw/i40iw_cm.c')
-rw-r--r-- | drivers/infiniband/hw/i40iw/i40iw_cm.c | 4419 |
1 files changed, 0 insertions, 4419 deletions
diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c deleted file mode 100644 index 2450b7dd51f6..000000000000 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ /dev/null @@ -1,4419 +0,0 @@ -/******************************************************************************* -* -* Copyright (c) 2015-2016 Intel Corporation. All rights reserved. -* -* This software is available to you under a choice of one of two -* licenses. You may choose to be licensed under the terms of the GNU -* General Public License (GPL) Version 2, available from the file -* COPYING in the main directory of this source tree, or the -* OpenFabrics.org BSD license below: -* -* Redistribution and use in source and binary forms, with or -* without modification, are permitted provided that the following -* conditions are met: -* -* - Redistributions of source code must retain the above -* copyright notice, this list of conditions and the following -* disclaimer. -* -* - Redistributions in binary form must reproduce the above -* copyright notice, this list of conditions and the following -* disclaimer in the documentation and/or other materials -* provided with the distribution. -* -* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS -* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -* SOFTWARE. -* -*******************************************************************************/ - -#include <linux/atomic.h> -#include <linux/ip.h> -#include <linux/tcp.h> -#include <linux/init.h> -#include <linux/if_arp.h> -#include <linux/if_vlan.h> -#include <linux/notifier.h> -#include <linux/net.h> -#include <linux/types.h> -#include <linux/timer.h> -#include <linux/time.h> -#include <linux/delay.h> -#include <linux/etherdevice.h> -#include <linux/netdevice.h> -#include <linux/random.h> -#include <linux/list.h> -#include <linux/threads.h> -#include <linux/highmem.h> -#include <net/arp.h> -#include <net/ndisc.h> -#include <net/neighbour.h> -#include <net/route.h> -#include <net/addrconf.h> -#include <net/ip6_route.h> -#include <net/ip_fib.h> -#include <net/secure_seq.h> -#include <net/tcp.h> -#include <asm/checksum.h> - -#include "i40iw.h" - -static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); -static void i40iw_cm_post_event(struct i40iw_cm_event *event); -static void i40iw_disconnect_worker(struct work_struct *work); - -/** - * i40iw_free_sqbuf - put back puda buffer if refcount = 0 - * @vsi: pointer to vsi structure - * @bufp: puda buffer to free - */ -void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp) -{ - struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; - struct i40iw_puda_rsrc *ilq = vsi->ilq; - - if (!atomic_dec_return(&buf->refcount)) - i40iw_puda_ret_bufpool(ilq, buf); -} - -/** - * i40iw_derive_hw_ird_setting - Calculate IRD - * - * @cm_ird: IRD of connection's node - * - * The ird from the connection is rounded to a supported HW - * setting (2,8,32,64) and then encoded for ird_size field of - * qp_ctx - */ -static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) -{ - u8 encoded_ird_size; - - /* ird_size field is encoded in qp_ctx */ - switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) { - case I40IW_HW_IRD_SETTING_64: - encoded_ird_size = 3; - break; - case I40IW_HW_IRD_SETTING_32: - case I40IW_HW_IRD_SETTING_16: - encoded_ird_size = 2; - break; - case I40IW_HW_IRD_SETTING_8: - case I40IW_HW_IRD_SETTING_4: - encoded_ird_size = 1; - break; - case I40IW_HW_IRD_SETTING_2: - default: - encoded_ird_size = 0; - break; - } - return encoded_ird_size; -} - -/** - * i40iw_record_ird_ord - Record IRD/ORD passed in - * @cm_node: connection's node - * @conn_ird: connection IRD - * @conn_ord: connection ORD - */ -static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird, - u32 conn_ord) -{ - if (conn_ird > I40IW_MAX_IRD_SIZE) - conn_ird = I40IW_MAX_IRD_SIZE; - - if (conn_ord > I40IW_MAX_ORD_SIZE) - conn_ord = I40IW_MAX_ORD_SIZE; - else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) - conn_ord = 1; - - cm_node->ird_size = conn_ird; - cm_node->ord_size = conn_ord; -} - -/** - * i40iw_copy_ip_ntohl - change network to host ip - * @dst: host ip - * @src: big endian - */ -void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) -{ - *dst++ = ntohl(*src++); - *dst++ = ntohl(*src++); - *dst++ = ntohl(*src++); - *dst = ntohl(*src); -} - -/** - * i40iw_copy_ip_htonl - change host addr to network ip - * @dst: host ip - * @src: little endian - */ -static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) -{ - *dst++ = htonl(*src++); - *dst++ = htonl(*src++); - *dst++ = htonl(*src++); - *dst = htonl(*src); -} - -/** - * i40iw_fill_sockaddr4 - get addr info for passive connection - * @cm_node: connection's node - * @event: upper layer's cm event - */ -static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, - struct iw_cm_event *event) -{ - struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; - struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; - - laddr->sin_family = AF_INET; - raddr->sin_family = AF_INET; - - laddr->sin_port = htons(cm_node->loc_port); - raddr->sin_port = htons(cm_node->rem_port); - - laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); - raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); -} - -/** - * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side - * @cm_node: connection's node - * @event: upper layer's cm event - */ -static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, - struct iw_cm_event *event) -{ - struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; - struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; - - laddr6->sin6_family = AF_INET6; - raddr6->sin6_family = AF_INET6; - - laddr6->sin6_port = htons(cm_node->loc_port); - raddr6->sin6_port = htons(cm_node->rem_port); - - i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, - cm_node->loc_addr); - i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, - cm_node->rem_addr); -} - -/** - * i40iw_get_addr_info - * @cm_node: contains ip/tcp info - * @cm_info: to get a copy of the cm_node ip/tcp info -*/ -static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, - struct i40iw_cm_info *cm_info) -{ - cm_info->ipv4 = cm_node->ipv4; - cm_info->vlan_id = cm_node->vlan_id; - memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); - memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); - cm_info->loc_port = cm_node->loc_port; - cm_info->rem_port = cm_node->rem_port; - cm_info->user_pri = cm_node->user_pri; -} - -/** - * i40iw_get_cmevent_info - for cm event upcall - * @cm_node: connection's node - * @cm_id: upper layers cm struct for the event - * @event: upper layer's cm event - */ -static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, - struct iw_cm_id *cm_id, - struct iw_cm_event *event) -{ - memcpy(&event->local_addr, &cm_id->m_local_addr, - sizeof(event->local_addr)); - memcpy(&event->remote_addr, &cm_id->m_remote_addr, - sizeof(event->remote_addr)); - if (cm_node) { - event->private_data = (void *)cm_node->pdata_buf; - event->private_data_len = (u8)cm_node->pdata.size; - event->ird = cm_node->ird_size; - event->ord = cm_node->ord_size; - } -} - -/** - * i40iw_send_cm_event - upcall cm's event handler - * @cm_node: connection's node - * @cm_id: upper layer's cm info struct - * @type: Event type to indicate - * @status: status for the event type - */ -static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, - struct iw_cm_id *cm_id, - enum iw_cm_event_type type, - int status) -{ - struct iw_cm_event event; - - memset(&event, 0, sizeof(event)); - event.event = type; - event.status = status; - switch (type) { - case IW_CM_EVENT_CONNECT_REQUEST: - if (cm_node->ipv4) - i40iw_fill_sockaddr4(cm_node, &event); - else - i40iw_fill_sockaddr6(cm_node, &event); - event.provider_data = (void *)cm_node; - event.private_data = (void *)cm_node->pdata_buf; - event.private_data_len = (u8)cm_node->pdata.size; - event.ird = cm_node->ird_size; - break; - case IW_CM_EVENT_CONNECT_REPLY: - i40iw_get_cmevent_info(cm_node, cm_id, &event); - break; - case IW_CM_EVENT_ESTABLISHED: - event.ird = cm_node->ird_size; - event.ord = cm_node->ord_size; - break; - case IW_CM_EVENT_DISCONNECT: - break; - case IW_CM_EVENT_CLOSE: - break; - default: - i40iw_pr_err("event type received type = %d\n", type); - return -1; - } - return cm_id->event_handler(cm_id, &event); -} - -/** - * i40iw_create_event - create cm event - * @cm_node: connection's node - * @type: Event type to generate - */ -static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, - enum i40iw_cm_event_type type) -{ - struct i40iw_cm_event *event; - - if (!cm_node->cm_id) - return NULL; - - event = kzalloc(sizeof(*event), GFP_ATOMIC); - - if (!event) - return NULL; - - event->type = type; - event->cm_node = cm_node; - memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); - memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); - event->cm_info.rem_port = cm_node->rem_port; - event->cm_info.loc_port = cm_node->loc_port; - event->cm_info.cm_id = cm_node->cm_id; - - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", - cm_node, - event, - type, - event->cm_info.loc_addr, - event->cm_info.rem_addr); - - i40iw_cm_post_event(event); - return event; -} - -/** - * i40iw_free_retrans_entry - free send entry - * @cm_node: connection's node - */ -static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) -{ - struct i40iw_device *iwdev = cm_node->iwdev; - struct i40iw_timer_entry *send_entry; - - send_entry = cm_node->send_entry; - if (send_entry) { - cm_node->send_entry = NULL; - i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf); - kfree(send_entry); - atomic_dec(&cm_node->ref_count); - } -} - -/** - * i40iw_cleanup_retrans_entry - free send entry with lock - * @cm_node: connection's node - */ -static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) -{ - unsigned long flags; - - spin_lock_irqsave(&cm_node->retrans_list_lock, flags); - i40iw_free_retrans_entry(cm_node); - spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); -} - -/** - * i40iw_form_cm_frame - get a free packet and build frame - * @cm_node: connection's node ionfo to use in frame - * @options: pointer to options info - * @hdr: pointer mpa header - * @pdata: pointer to private data - * @flags: indicates FIN or ACK - */ -static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, - struct i40iw_kmem_info *options, - struct i40iw_kmem_info *hdr, - struct i40iw_kmem_info *pdata, - u8 flags) -{ - struct i40iw_puda_buf *sqbuf; - struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; - u8 *buf; - - struct tcphdr *tcph; - struct iphdr *iph; - struct ipv6hdr *ip6h; - struct ethhdr *ethh; - u16 packetsize; - u16 eth_hlen = ETH_HLEN; - u32 opts_len = 0; - u32 pd_len = 0; - u32 hdr_len = 0; - u16 vtag; - - sqbuf = i40iw_puda_get_bufpool(vsi->ilq); - if (!sqbuf) - return NULL; - buf = sqbuf->mem.va; - - if (options) - opts_len = (u32)options->size; - - if (hdr) - hdr_len = hdr->size; - - if (pdata) - pd_len = pdata->size; - - if (cm_node->vlan_id <= VLAN_VID_MASK) - eth_hlen += 4; - - if (cm_node->ipv4) - packetsize = sizeof(*iph) + sizeof(*tcph); - else - packetsize = sizeof(*ip6h) + sizeof(*tcph); - packetsize += opts_len + hdr_len + pd_len; - - memset(buf, 0x00, eth_hlen + packetsize); - - sqbuf->totallen = packetsize + eth_hlen; - sqbuf->maclen = eth_hlen; - sqbuf->tcphlen = sizeof(*tcph) + opts_len; - sqbuf->scratch = (void *)cm_node; - - ethh = (struct ethhdr *)buf; - buf += eth_hlen; - - if (cm_node->ipv4) { - sqbuf->ipv4 = true; - - iph = (struct iphdr *)buf; - buf += sizeof(*iph); - tcph = (struct tcphdr *)buf; - buf += sizeof(*tcph); - - ether_addr_copy(ethh->h_dest, cm_node->rem_mac); - ether_addr_copy(ethh->h_source, cm_node->loc_mac); - if (cm_node->vlan_id <= VLAN_VID_MASK) { - ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); - vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; - ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); - - ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); - } else { - ethh->h_proto = htons(ETH_P_IP); - } - - iph->version = IPVERSION; - iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ - iph->tos = cm_node->tos; - iph->tot_len = htons(packetsize); - iph->id = htons(++cm_node->tcp_cntxt.loc_id); - - iph->frag_off = htons(0x4000); - iph->ttl = 0x40; - iph->protocol = IPPROTO_TCP; - iph->saddr = htonl(cm_node->loc_addr[0]); - iph->daddr = htonl(cm_node->rem_addr[0]); - } else { - sqbuf->ipv4 = false; - ip6h = (struct ipv6hdr *)buf; - buf += sizeof(*ip6h); - tcph = (struct tcphdr *)buf; - buf += sizeof(*tcph); - - ether_addr_copy(ethh->h_dest, cm_node->rem_mac); - ether_addr_copy(ethh->h_source, cm_node->loc_mac); - if (cm_node->vlan_id <= VLAN_VID_MASK) { - ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); - vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; - ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); - ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); - } else { - ethh->h_proto = htons(ETH_P_IPV6); - } - ip6h->version = 6; - ip6h->priority = cm_node->tos >> 4; - ip6h->flow_lbl[0] = cm_node->tos << 4; - ip6h->flow_lbl[1] = 0; - ip6h->flow_lbl[2] = 0; - ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); - ip6h->nexthdr = 6; - ip6h->hop_limit = 128; - i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, - cm_node->loc_addr); - i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, - cm_node->rem_addr); - } - - tcph->source = htons(cm_node->loc_port); - tcph->dest = htons(cm_node->rem_port); - - tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); - - if (flags & SET_ACK) { - cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; - tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); - tcph->ack = 1; - } else { - tcph->ack_seq = 0; - } - - if (flags & SET_SYN) { - cm_node->tcp_cntxt.loc_seq_num++; - tcph->syn = 1; - } else { - cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; - } - - if (flags & SET_FIN) { - cm_node->tcp_cntxt.loc_seq_num++; - tcph->fin = 1; - } - - if (flags & SET_RST) - tcph->rst = 1; - - tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); - sqbuf->tcphlen = tcph->doff << 2; - tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); - tcph->urg_ptr = 0; - - if (opts_len) { - memcpy(buf, options->addr, opts_len); - buf += opts_len; - } - - if (hdr_len) { - memcpy(buf, hdr->addr, hdr_len); - buf += hdr_len; - } - - if (pdata && pdata->addr) - memcpy(buf, pdata->addr, pdata->size); - - atomic_set(&sqbuf->refcount, 1); - - return sqbuf; -} - -/** - * i40iw_send_reset - Send RST packet - * @cm_node: connection's node - */ -int i40iw_send_reset(struct i40iw_cm_node *cm_node) -{ - struct i40iw_puda_buf *sqbuf; - int flags = SET_RST | SET_ACK; - - sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); - if (!sqbuf) { - i40iw_pr_err("no sqbuf\n"); - return -1; - } - - return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); -} - -/** - * i40iw_active_open_err - send event for active side cm error - * @cm_node: connection's node - * @reset: Flag to send reset or not - */ -static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) -{ - i40iw_cleanup_retrans_entry(cm_node); - cm_node->cm_core->stats_connect_errs++; - if (reset) { - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "%s cm_node=%p state=%d\n", - __func__, - cm_node, - cm_node->state); - atomic_inc(&cm_node->ref_count); - i40iw_send_reset(cm_node); - } - - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); -} - -/** - * i40iw_passive_open_err - handle passive side cm error - * @cm_node: connection's node - * @reset: send reset or just free cm_node - */ -static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) -{ - i40iw_cleanup_retrans_entry(cm_node); - cm_node->cm_core->stats_passive_errs++; - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "%s cm_node=%p state =%d\n", - __func__, - cm_node, - cm_node->state); - if (reset) - i40iw_send_reset(cm_node); - else - i40iw_rem_ref_cm_node(cm_node); -} - -/** - * i40iw_event_connect_error - to create connect error event - * @event: cm information for connect event - */ -static void i40iw_event_connect_error(struct i40iw_cm_event *event) -{ - struct i40iw_qp *iwqp; - struct iw_cm_id *cm_id; - - cm_id = event->cm_node->cm_id; - if (!cm_id) - return; - - iwqp = cm_id->provider_data; - - if (!iwqp || !iwqp->iwdev) - return; - - iwqp->cm_id = NULL; - cm_id->provider_data = NULL; - i40iw_send_cm_event(event->cm_node, cm_id, - IW_CM_EVENT_CONNECT_REPLY, - -ECONNRESET); - cm_id->rem_ref(cm_id); - i40iw_rem_ref_cm_node(event->cm_node); -} - -/** - * i40iw_process_options - * @cm_node: connection's node - * @optionsloc: point to start of options - * @optionsize: size of all options - * @syn_packet: flag if syn packet - */ -static int i40iw_process_options(struct i40iw_cm_node *cm_node, - u8 *optionsloc, - u32 optionsize, - u32 syn_packet) -{ - u32 tmp; - u32 offset = 0; - union all_known_options *all_options; - char got_mss_option = 0; - - while (offset < optionsize) { - all_options = (union all_known_options *)(optionsloc + offset); - switch (all_options->as_base.optionnum) { - case OPTION_NUMBER_END: - offset = optionsize; - break; - case OPTION_NUMBER_NONE: - offset += 1; - continue; - case OPTION_NUMBER_MSS: - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "%s: MSS Length: %d Offset: %d Size: %d\n", - __func__, - all_options->as_mss.length, - offset, - optionsize); - got_mss_option = 1; - if (all_options->as_mss.length != 4) - return -1; - tmp = ntohs(all_options->as_mss.mss); - if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) - cm_node->tcp_cntxt.mss = tmp; - break; - case OPTION_NUMBER_WINDOW_SCALE: - cm_node->tcp_cntxt.snd_wscale = - all_options->as_windowscale.shiftcount; - break; - default: - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "TCP Option not understood: %x\n", - all_options->as_base.optionnum); - break; - } - offset += all_options->as_base.length; - } - if (!got_mss_option && syn_packet) - cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; - return 0; -} - -/** - * i40iw_handle_tcp_options - - * @cm_node: connection's node - * @tcph: pointer tcp header - * @optionsize: size of options rcvd - * @passive: active or passive flag - */ -static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, - struct tcphdr *tcph, - int optionsize, - int passive) -{ - u8 *optionsloc = (u8 *)&tcph[1]; - - if (optionsize) { - if (i40iw_process_options(cm_node, - optionsloc, - optionsize, - (u32)tcph->syn)) { - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "%s: Node %p, Sending RESET\n", - __func__, - cm_node); - if (passive) - i40iw_passive_open_err(cm_node, true); - else - i40iw_active_open_err(cm_node, true); - return -1; - } - } - - cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << - cm_node->tcp_cntxt.snd_wscale; - - if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) - cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; - return 0; -} - -/** - * i40iw_build_mpa_v1 - build a MPA V1 frame - * @cm_node: connection's node - * @start_addr: MPA frame start address - * @mpa_key: to do read0 or write0 - */ -static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, - void *start_addr, - u8 mpa_key) -{ - struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; - - switch (mpa_key) { - case MPA_KEY_REQUEST: - memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); - break; - case MPA_KEY_REPLY: - memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); - break; - default: - break; - } - mpa_frame->flags = IETF_MPA_FLAGS_CRC; - mpa_frame->rev = cm_node->mpa_frame_rev; - mpa_frame->priv_data_len = htons(cm_node->pdata.size); -} - -/** - * i40iw_build_mpa_v2 - build a MPA V2 frame - * @cm_node: connection's node - * @start_addr: buffer start address - * @mpa_key: to do read0 or write0 - */ -static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, - void *start_addr, - u8 mpa_key) -{ - struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; - struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; - u16 ctrl_ird, ctrl_ord; - - /* initialize the upper 5 bytes of the frame */ - i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); - mpa_frame->flags |= IETF_MPA_V2_FLAG; - mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); - - /* initialize RTR msg */ - if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { - ctrl_ird = IETF_NO_IRD_ORD; - ctrl_ord = IETF_NO_IRD_ORD; - } else { - ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? - IETF_NO_IRD_ORD : cm_node->ird_size; - ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? - IETF_NO_IRD_ORD : cm_node->ord_size; - } - - ctrl_ird |= IETF_PEER_TO_PEER; - - switch (mpa_key) { - case MPA_KEY_REQUEST: - ctrl_ord |= IETF_RDMA0_WRITE; - ctrl_ord |= IETF_RDMA0_READ; - break; - case MPA_KEY_REPLY: - switch (cm_node->send_rdma0_op) { - case SEND_RDMA_WRITE_ZERO: - ctrl_ord |= IETF_RDMA0_WRITE; - break; - case SEND_RDMA_READ_ZERO: - ctrl_ord |= IETF_RDMA0_READ; - break; - } - break; - default: - break; - } - rtr_msg->ctrl_ird = htons(ctrl_ird); - rtr_msg->ctrl_ord = htons(ctrl_ord); -} - -/** - * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 - * @cm_node: connection's node - * @mpa: mpa: data buffer - * @mpa_key: to do read0 or write0 - */ -static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, - struct i40iw_kmem_info *mpa, - u8 mpa_key) -{ - int hdr_len = 0; - - switch (cm_node->mpa_frame_rev) { - case IETF_MPA_V1: - hdr_len = sizeof(struct ietf_mpa_v1); - i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); - break; - case IETF_MPA_V2: - hdr_len = sizeof(struct ietf_mpa_v2); - i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); - break; - default: - break; - } - - return hdr_len; -} - -/** - * i40iw_send_mpa_request - active node send mpa request to passive node - * @cm_node: connection's node - */ -static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) -{ - struct i40iw_puda_buf *sqbuf; - - if (!cm_node) { - i40iw_pr_err("cm_node == NULL\n"); - return -1; - } - - cm_node->mpa_hdr.addr = &cm_node->mpa_frame; - cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, - &cm_node->mpa_hdr, - MPA_KEY_REQUEST); - if (!cm_node->mpa_hdr.size) { - i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); - return -1; - } - - sqbuf = i40iw_form_cm_frame(cm_node, - NULL, - &cm_node->mpa_hdr, - &cm_node->pdata, - SET_ACK); - if (!sqbuf) { - i40iw_pr_err("sq_buf == NULL\n"); - return -1; - } - return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); -} - -/** - * i40iw_send_mpa_reject - - * @cm_node: connection's node - * @pdata: reject data for connection - * @plen: length of reject data - */ -static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, - const void *pdata, - u8 plen) -{ - struct i40iw_puda_buf *sqbuf; - struct i40iw_kmem_info priv_info; - - cm_node->mpa_hdr.addr = &cm_node->mpa_frame; - cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, - &cm_node->mpa_hdr, - MPA_KEY_REPLY); - - cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; - priv_info.addr = (void *)pdata; - priv_info.size = plen; - - sqbuf = i40iw_form_cm_frame(cm_node, - NULL, - &cm_node->mpa_hdr, - &priv_info, - SET_ACK | SET_FIN); - if (!sqbuf) { - i40iw_pr_err("no sqbuf\n"); - return -ENOMEM; - } - cm_node->state = I40IW_CM_STATE_FIN_WAIT1; - return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); -} - -/** - * i40iw_parse_mpa - process an IETF MPA frame - * @cm_node: connection's node - * @buffer: Data pointer - * @type: to return accept or reject - * @len: Len of mpa buffer - */ -static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) -{ - struct ietf_mpa_v1 *mpa_frame; - struct ietf_mpa_v2 *mpa_v2_frame; - struct ietf_rtr_msg *rtr_msg; - int mpa_hdr_len; - int priv_data_len; - - *type = I40IW_MPA_REQUEST_ACCEPT; - - if (len < sizeof(struct ietf_mpa_v1)) { - i40iw_pr_err("ietf buffer small (%x)\n", len); - return -1; - } - - mpa_frame = (struct ietf_mpa_v1 *)buffer; - mpa_hdr_len = sizeof(struct ietf_mpa_v1); - priv_data_len = ntohs(mpa_frame->priv_data_len); - - if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { - i40iw_pr_err("large pri_data %d\n", priv_data_len); - return -1; - } - if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { - i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); - return -1; - } - if (mpa_frame->rev > cm_node->mpa_frame_rev) { - i40iw_pr_err("rev %d\n", mpa_frame->rev); - return -1; - } - cm_node->mpa_frame_rev = mpa_frame->rev; - - if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { - if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { - i40iw_pr_err("Unexpected MPA Key received\n"); - return -1; - } - } else { - if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { - i40iw_pr_err("Unexpected MPA Key received\n"); - return -1; - } - } - - if (priv_data_len + mpa_hdr_len > len) { - i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", - priv_data_len, mpa_hdr_len, len); - return -1; - } - if (len > MAX_CM_BUFFER) { - i40iw_pr_err("ietf buffer large len = %d\n", len); - return -1; - } - - switch (mpa_frame->rev) { - case IETF_MPA_V2:{ - u16 ird_size; - u16 ord_size; - u16 ctrl_ord; - u16 ctrl_ird; - - mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; - mpa_hdr_len += IETF_RTR_MSG_SIZE; - rtr_msg = &mpa_v2_frame->rtr_msg; - - /* parse rtr message */ - ctrl_ord = ntohs(rtr_msg->ctrl_ord); - ctrl_ird = ntohs(rtr_msg->ctrl_ird); - ird_size = ctrl_ird & IETF_NO_IRD_ORD; - ord_size = ctrl_ord & IETF_NO_IRD_ORD; - - if (!(ctrl_ird & IETF_PEER_TO_PEER)) - return -1; - - if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { - cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; - goto negotiate_done; - } - - if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { - /* responder */ - if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) - cm_node->ird_size = 1; - if (cm_node->ord_size > ird_size) - cm_node->ord_size = ird_size; - } else { - /* initiator */ - if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) - return -1; - if (cm_node->ord_size > ird_size) - cm_node->ord_size = ird_size; - - if (cm_node->ird_size < ord_size) - /* no resources available */ - return -1; - } - -negotiate_done: - if (ctrl_ord & IETF_RDMA0_READ) - cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; - else if (ctrl_ord & IETF_RDMA0_WRITE) - cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; - else /* Not supported RDMA0 operation */ - return -1; - i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, - "MPAV2: Negotiated ORD: %d, IRD: %d\n", - cm_node->ord_size, cm_node->ird_size); - break; - } - break; - case IETF_MPA_V1: - default: - break; - } - - memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); - cm_node->pdata.size = priv_data_len; - - if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) - *type = I40IW_MPA_REQUEST_REJECT; - - if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) - cm_node->snd_mark_en = true; - - return 0; -} - -/** - * i40iw_schedule_cm_timer - * @cm_node: connection's node - * @sqbuf: buffer to send - * @type: if it is send or close - * @send_retrans: if rexmits to be done - * @close_when_complete: is cm_node to be removed - * - * note - cm_node needs to be protected before calling this. Encase in: - * i40iw_rem_ref_cm_node(cm_core, cm_node); - * i40iw_schedule_cm_timer(...) - * atomic_inc(&cm_node->ref_count); - */ -int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *sqbuf, - enum i40iw_timer_type type, - int send_retrans, - int close_when_complete) -{ - struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; - struct i40iw_cm_core *cm_core = cm_node->cm_core; - struct i40iw_timer_entry *new_send; - int ret = 0; - u32 was_timer_set; - unsigned long flags; - - new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); - if (!new_send) { - if (type != I40IW_TIMER_TYPE_CLOSE) - i40iw_free_sqbuf(vsi, (void *)sqbuf); - return -ENOMEM; - } - new_send->retrycount = I40IW_DEFAULT_RETRYS; - new_send->retranscount = I40IW_DEFAULT_RETRANS; - new_send->sqbuf = sqbuf; - new_send->timetosend = jiffies; - new_send->type = type; - new_send->send_retrans = send_retrans; - new_send->close_when_complete = close_when_complete; - - if (type == I40IW_TIMER_TYPE_CLOSE) { - new_send->timetosend += (HZ / 10); - if (cm_node->close_entry) { - kfree(new_send); - i40iw_pr_err("already close entry\n"); - return -EINVAL; - } - cm_node->close_entry = new_send; - } - - if (type == I40IW_TIMER_TYPE_SEND) { - spin_lock_irqsave(&cm_node->retrans_list_lock, flags); - cm_node->send_entry = new_send; - atomic_inc(&cm_node->ref_count); - spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); - new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; - - atomic_inc(&sqbuf->refcount); - i40iw_puda_send_buf(vsi->ilq, sqbuf); - if (!send_retrans) { - i40iw_cleanup_retrans_entry(cm_node); - if (close_when_complete) - i40iw_rem_ref_cm_node(cm_node); - return ret; - } - } - - spin_lock_irqsave(&cm_core->ht_lock, flags); - was_timer_set = timer_pending(&cm_core->tcp_timer); - - if (!was_timer_set) { - cm_core->tcp_timer.expires = new_send->timetosend; - add_timer(&cm_core->tcp_timer); - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - return ret; -} - -/** - * i40iw_retrans_expired - Could not rexmit the packet - * @cm_node: connection's node - */ -static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) -{ - struct iw_cm_id *cm_id = cm_node->cm_id; - enum i40iw_cm_node_state state = cm_node->state; - - cm_node->state = I40IW_CM_STATE_CLOSED; - switch (state) { - case I40IW_CM_STATE_SYN_RCVD: - case I40IW_CM_STATE_CLOSING: - i40iw_rem_ref_cm_node(cm_node); - break; - case I40IW_CM_STATE_FIN_WAIT1: - case I40IW_CM_STATE_LAST_ACK: - if (cm_node->cm_id) - cm_id->rem_ref(cm_id); - i40iw_send_reset(cm_node); - break; - default: - atomic_inc(&cm_node->ref_count); - i40iw_send_reset(cm_node); - i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); - break; - } -} - -/** - * i40iw_handle_close_entry - for handling retry/timeouts - * @cm_node: connection's node - * @rem_node: flag for remove cm_node - */ -static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) -{ - struct i40iw_timer_entry *close_entry = cm_node->close_entry; - struct iw_cm_id *cm_id = cm_node->cm_id; - struct i40iw_qp *iwqp; - unsigned long flags; - - if (!close_entry) - return; - iwqp = (struct i40iw_qp *)close_entry->sqbuf; - if (iwqp) { - spin_lock_irqsave(&iwqp->lock, flags); - if (iwqp->cm_id) { - iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; - iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; - iwqp->last_aeq = I40IW_AE_RESET_SENT; - iwqp->ibqp_state = IB_QPS_ERR; - spin_unlock_irqrestore(&iwqp->lock, flags); - i40iw_cm_disconn(iwqp); - } else { - spin_unlock_irqrestore(&iwqp->lock, flags); - } - } else if (rem_node) { - /* TIME_WAIT state */ - i40iw_rem_ref_cm_node(cm_node); - } - if (cm_id) - cm_id->rem_ref(cm_id); - kfree(close_entry); - cm_node->close_entry = NULL; -} - -/** - * i40iw_build_timer_list - Add cm_nodes to timer list - * @timer_list: ptr to timer list - * @hte: ptr to accelerated or non-accelerated list - */ -static void i40iw_build_timer_list(struct list_head *timer_list, - struct list_head *hte) -{ - struct i40iw_cm_node *cm_node; - struct list_head *list_core_temp, *list_node; - - list_for_each_safe(list_node, list_core_temp, hte) { - cm_node = container_of(list_node, struct i40iw_cm_node, list); - if (cm_node->close_entry || cm_node->send_entry) { - atomic_inc(&cm_node->ref_count); - list_add(&cm_node->timer_entry, timer_list); - } - } -} - -/** - * i40iw_cm_timer_tick - system's timer expired callback - * @t: Timer instance to fetch the cm_core pointer from - */ -static void i40iw_cm_timer_tick(struct timer_list *t) -{ - unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; - struct i40iw_cm_node *cm_node; - struct i40iw_timer_entry *send_entry, *close_entry; - struct list_head *list_core_temp; - struct i40iw_sc_vsi *vsi; - struct list_head *list_node; - struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); - u32 settimer = 0; - unsigned long timetosend; - unsigned long flags; - - struct list_head timer_list; - - INIT_LIST_HEAD(&timer_list); - - spin_lock_irqsave(&cm_core->ht_lock, flags); - i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list); - i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - list_for_each_safe(list_node, list_core_temp, &timer_list) { - cm_node = container_of(list_node, - struct i40iw_cm_node, - timer_entry); - close_entry = cm_node->close_entry; - - if (close_entry) { - if (time_after(close_entry->timetosend, jiffies)) { - if (nexttimeout > close_entry->timetosend || - !settimer) { - nexttimeout = close_entry->timetosend; - settimer = 1; - } - } else { - i40iw_handle_close_entry(cm_node, 1); - } - } - - spin_lock_irqsave(&cm_node->retrans_list_lock, flags); - - send_entry = cm_node->send_entry; - if (!send_entry) - goto done; - if (time_after(send_entry->timetosend, jiffies)) { - if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { - if ((nexttimeout > send_entry->timetosend) || - !settimer) { - nexttimeout = send_entry->timetosend; - settimer = 1; - } - } else { - i40iw_free_retrans_entry(cm_node); - } - goto done; - } - - if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || - (cm_node->state == I40IW_CM_STATE_CLOSED)) { - i40iw_free_retrans_entry(cm_node); - goto done; - } - - if (!send_entry->retranscount || !send_entry->retrycount) { - i40iw_free_retrans_entry(cm_node); - - spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); - i40iw_retrans_expired(cm_node); - cm_node->state = I40IW_CM_STATE_CLOSED; - spin_lock_irqsave(&cm_node->retrans_list_lock, flags); - goto done; - } - spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); - - vsi = &cm_node->iwdev->vsi; - - if (!cm_node->ack_rcvd) { - atomic_inc(&send_entry->sqbuf->refcount); - i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); - cm_node->cm_core->stats_pkt_retrans++; - } - spin_lock_irqsave(&cm_node->retrans_list_lock, flags); - if (send_entry->send_retrans) { - send_entry->retranscount--; - timetosend = (I40IW_RETRY_TIMEOUT << - (I40IW_DEFAULT_RETRANS - - send_entry->retranscount)); - - send_entry->timetosend = jiffies + - min(timetosend, I40IW_MAX_TIMEOUT); - if (nexttimeout > send_entry->timetosend || !settimer) { - nexttimeout = send_entry->timetosend; - settimer = 1; - } - } else { - int close_when_complete; - - close_when_complete = send_entry->close_when_complete; - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "cm_node=%p state=%d\n", - cm_node, - cm_node->state); - i40iw_free_retrans_entry(cm_node); - if (close_when_complete) - i40iw_rem_ref_cm_node(cm_node); - } -done: - spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); - i40iw_rem_ref_cm_node(cm_node); - } - - if (settimer) { - spin_lock_irqsave(&cm_core->ht_lock, flags); - if (!timer_pending(&cm_core->tcp_timer)) { - cm_core->tcp_timer.expires = nexttimeout; - add_timer(&cm_core->tcp_timer); - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - } -} - -/** - * i40iw_send_syn - send SYN packet - * @cm_node: connection's node - * @sendack: flag to set ACK bit or not - */ -int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) -{ - struct i40iw_puda_buf *sqbuf; - int flags = SET_SYN; - char optionsbuffer[sizeof(struct option_mss) + - sizeof(struct option_windowscale) + - sizeof(struct option_base) + TCP_OPTIONS_PADDING]; - struct i40iw_kmem_info opts; - - int optionssize = 0; - /* Sending MSS option */ - union all_known_options *options; - - opts.addr = optionsbuffer; - if (!cm_node) { - i40iw_pr_err("no cm_node\n"); - return -EINVAL; - } - - options = (union all_known_options *)&optionsbuffer[optionssize]; - options->as_mss.optionnum = OPTION_NUMBER_MSS; - options->as_mss.length = sizeof(struct option_mss); - options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); - optionssize += sizeof(struct option_mss); - - options = (union all_known_options *)&optionsbuffer[optionssize]; - options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; - options->as_windowscale.length = sizeof(struct option_windowscale); - options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; - optionssize += sizeof(struct option_windowscale); - options = (union all_known_options *)&optionsbuffer[optionssize]; - options->as_end = OPTION_NUMBER_END; - optionssize += 1; - - if (sendack) - flags |= SET_ACK; - - opts.size = optionssize; - - sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); - if (!sqbuf) { - i40iw_pr_err("no sqbuf\n"); - return -1; - } - return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); -} - -/** - * i40iw_send_ack - Send ACK packet - * @cm_node: connection's node - */ -static void i40iw_send_ack(struct i40iw_cm_node *cm_node) -{ - struct i40iw_puda_buf *sqbuf; - struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; - - sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); - if (sqbuf) - i40iw_puda_send_buf(vsi->ilq, sqbuf); - else - i40iw_pr_err("no sqbuf\n"); -} - -/** - * i40iw_send_fin - Send FIN pkt - * @cm_node: connection's node - */ -static int i40iw_send_fin(struct i40iw_cm_node *cm_node) -{ - struct i40iw_puda_buf *sqbuf; - - sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); - if (!sqbuf) { - i40iw_pr_err("no sqbuf\n"); - return -1; - } - return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); -} - -/** - * i40iw_find_node - find a cm node that matches the reference cm node - * @cm_core: cm's core - * @rem_port: remote tcp port num - * @rem_addr: remote ip addr - * @loc_port: local tcp port num - * @loc_addr: loc ip addr - * @add_refcnt: flag to increment refcount of cm_node - * @accelerated_list: flag for accelerated vs non-accelerated list to search - */ -struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, - u16 rem_port, - u32 *rem_addr, - u16 loc_port, - u32 *loc_addr, - bool add_refcnt, - bool accelerated_list) -{ - struct list_head *hte; - struct i40iw_cm_node *cm_node; - unsigned long flags; - - hte = accelerated_list ? - &cm_core->accelerated_list : &cm_core->non_accelerated_list; - - /* walk list and find cm_node associated with this session ID */ - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_for_each_entry(cm_node, hte, list) { - if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && - (cm_node->loc_port == loc_port) && - !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) && - (cm_node->rem_port == rem_port)) { - if (add_refcnt) - atomic_inc(&cm_node->ref_count); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - return cm_node; - } - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - /* no owner node */ - return NULL; -} - -/** - * i40iw_find_listener - find a cm node listening on this addr-port pair - * @cm_core: cm's core - * @dst_port: listener tcp port num - * @dst_addr: listener ip addr - * @vlan_id: vlan id for the given address - * @listener_state: state to match with listen node's - */ -static struct i40iw_cm_listener *i40iw_find_listener( - struct i40iw_cm_core *cm_core, - u32 *dst_addr, - u16 dst_port, - u16 vlan_id, - enum i40iw_cm_listener_state - listener_state) -{ - struct i40iw_cm_listener *listen_node; - static const u32 ip_zero[4] = { 0, 0, 0, 0 }; - u32 listen_addr[4]; - u16 listen_port; - unsigned long flags; - - /* walk list and find cm_node associated with this session ID */ - spin_lock_irqsave(&cm_core->listen_list_lock, flags); - list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { - memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); - listen_port = listen_node->loc_port; - /* compare node pair, return node handle if a match */ - if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || - !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && - (listen_port == dst_port) && - (listener_state & listen_node->listener_state)) { - atomic_inc(&listen_node->ref_count); - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - return listen_node; - } - } - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - return NULL; -} - -/** - * i40iw_add_hte_node - add a cm node to the hash table - * @cm_core: cm's core - * @cm_node: connection's node - */ -static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, - struct i40iw_cm_node *cm_node) -{ - unsigned long flags; - - if (!cm_node || !cm_core) { - i40iw_pr_err("cm_node or cm_core == NULL\n"); - return; - } - - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_add_tail(&cm_node->list, &cm_core->non_accelerated_list); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); -} - -/** - * i40iw_find_port - find port that matches reference port - * @hte: ptr to accelerated or non-accelerated list - * @port: port number to locate - */ -static bool i40iw_find_port(struct list_head *hte, u16 port) -{ - struct i40iw_cm_node *cm_node; - - list_for_each_entry(cm_node, hte, list) { - if (cm_node->loc_port == port) - return true; - } - return false; -} - -/** - * i40iw_port_in_use - determine if port is in use - * @cm_core: cm's core - * @port: port number - */ -bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port) -{ - struct i40iw_cm_listener *listen_node; - unsigned long flags; - - spin_lock_irqsave(&cm_core->ht_lock, flags); - if (i40iw_find_port(&cm_core->accelerated_list, port) || - i40iw_find_port(&cm_core->non_accelerated_list, port)) { - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - return true; - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - spin_lock_irqsave(&cm_core->listen_list_lock, flags); - list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { - if (listen_node->loc_port == port) { - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - return true; - } - } - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - - return false; -} - -/** - * i40iw_del_multiple_qhash - Remove qhash and child listens - * @iwdev: iWarp device - * @cm_info: CM info for parent listen node - * @cm_parent_listen_node: The parent listen node - */ -static enum i40iw_status_code i40iw_del_multiple_qhash( - struct i40iw_device *iwdev, - struct i40iw_cm_info *cm_info, - struct i40iw_cm_listener *cm_parent_listen_node) -{ - struct i40iw_cm_listener *child_listen_node; - enum i40iw_status_code ret = I40IW_ERR_CONFIG; - struct list_head *pos, *tpos; - unsigned long flags; - - spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); - list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { - child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); - if (child_listen_node->ipv4) - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "removing child listen for IP=%pI4, port=%d, vlan=%d\n", - child_listen_node->loc_addr, - child_listen_node->loc_port, - child_listen_node->vlan_id); - else - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, - "removing child listen for IP=%pI6, port=%d, vlan=%d\n", - child_listen_node->loc_addr, - child_listen_node->loc_port, - child_listen_node->vlan_id); - list_del(pos); - memcpy(cm_info->loc_addr, child_listen_node->loc_addr, - sizeof(cm_info->loc_addr)); - cm_info->vlan_id = child_listen_node->vlan_id; - if (child_listen_node->qhash_set) { - ret = i40iw_manage_qhash(iwdev, cm_info, - I40IW_QHASH_TYPE_TCP_SYN, - I40IW_QHASH_MANAGE_TYPE_DELETE, - NULL, false); - child_listen_node->qhash_set = false; - } else { - ret = I40IW_SUCCESS; - } - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "freed pointer = %p\n", - child_listen_node); - kfree(child_listen_node); - cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; - } - spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); - - return ret; -} - -/** - * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan - * @addr: local IPv6 address - * @vlan_id: vlan id for the given IPv6 address - * - * Returns the net_device of the IPv6 address and also sets the - * vlan id for that address. - */ -static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id) -{ - struct net_device *ip_dev = NULL; - struct in6_addr laddr6; - - if (!IS_ENABLED(CONFIG_IPV6)) - return NULL; - i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); - if (vlan_id) - *vlan_id = I40IW_NO_VLAN; - rcu_read_lock(); - for_each_netdev_rcu(&init_net, ip_dev) { - if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { - if (vlan_id) - *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); - break; - } - } - rcu_read_unlock(); - return ip_dev; -} - -/** - * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address - * @addr: local IPv4 address - */ -static u16 i40iw_get_vlan_ipv4(u32 *addr) -{ - struct net_device *netdev; - u16 vlan_id = I40IW_NO_VLAN; - - netdev = ip_dev_find(&init_net, htonl(addr[0])); - if (netdev) { - vlan_id = rdma_vlan_dev_vlan_id(netdev); - dev_put(netdev); - } - return vlan_id; -} - -/** - * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 - * @iwdev: iWarp device - * @cm_info: CM info for parent listen node - * @cm_parent_listen_node: The parent listen node - * - * Adds a qhash and a child listen node for every IPv6 address - * on the adapter and adds the associated qhash filter - */ -static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, - struct i40iw_cm_info *cm_info, - struct i40iw_cm_listener *cm_parent_listen_node) -{ - struct net_device *ip_dev; - struct inet6_dev *idev; - struct inet6_ifaddr *ifp, *tmp; - enum i40iw_status_code ret = 0; - struct i40iw_cm_listener *child_listen_node; - unsigned long flags; - - rtnl_lock(); - for_each_netdev(&init_net, ip_dev) { - if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && - (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || - (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { - idev = __in6_dev_get(ip_dev); - if (!idev) { - i40iw_pr_err("idev == NULL\n"); - break; - } - list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "IP=%pI6, vlan_id=%d, MAC=%pM\n", - &ifp->addr, - rdma_vlan_dev_vlan_id(ip_dev), - ip_dev->dev_addr); - child_listen_node = - kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "Allocating child listener %p\n", - child_listen_node); - if (!child_listen_node) { - ret = I40IW_ERR_NO_MEMORY; - goto exit; - } - cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); - cm_parent_listen_node->vlan_id = cm_info->vlan_id; - - memcpy(child_listen_node, cm_parent_listen_node, - sizeof(*child_listen_node)); - - i40iw_copy_ip_ntohl(child_listen_node->loc_addr, - ifp->addr.in6_u.u6_addr32); - memcpy(cm_info->loc_addr, child_listen_node->loc_addr, - sizeof(cm_info->loc_addr)); - - ret = i40iw_manage_qhash(iwdev, cm_info, - I40IW_QHASH_TYPE_TCP_SYN, - I40IW_QHASH_MANAGE_TYPE_ADD, - NULL, true); - if (!ret) { - child_listen_node->qhash_set = true; - spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); - list_add(&child_listen_node->child_listen_list, - &cm_parent_listen_node->child_listen_list); - spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); - cm_parent_listen_node->cm_core->stats_listen_nodes_created++; - } else { - kfree(child_listen_node); - } - } - } - } -exit: - rtnl_unlock(); - return ret; -} - -/** - * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 - * @iwdev: iWarp device - * @cm_info: CM info for parent listen node - * @cm_parent_listen_node: The parent listen node - * - * Adds a qhash and a child listen node for every IPv4 address - * on the adapter and adds the associated qhash filter - */ -static enum i40iw_status_code i40iw_add_mqh_4( - struct i40iw_device *iwdev, - struct i40iw_cm_info *cm_info, - struct i40iw_cm_listener *cm_parent_listen_node) -{ - struct net_device *dev; - struct in_device *idev; - struct i40iw_cm_listener *child_listen_node; - enum i40iw_status_code ret = 0; - unsigned long flags; - - rtnl_lock(); - for_each_netdev(&init_net, dev) { - if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && - (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || - (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { - const struct in_ifaddr *ifa; - - idev = in_dev_get(dev); - - in_dev_for_each_ifa_rtnl(ifa, idev) { - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", - &ifa->ifa_address, - rdma_vlan_dev_vlan_id(dev), - dev->dev_addr); - child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); - cm_parent_listen_node->cm_core->stats_listen_nodes_created++; - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "Allocating child listener %p\n", - child_listen_node); - if (!child_listen_node) { - in_dev_put(idev); - ret = I40IW_ERR_NO_MEMORY; - goto exit; - } - cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); - cm_parent_listen_node->vlan_id = cm_info->vlan_id; - memcpy(child_listen_node, - cm_parent_listen_node, - sizeof(*child_listen_node)); - - child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); - memcpy(cm_info->loc_addr, child_listen_node->loc_addr, - sizeof(cm_info->loc_addr)); - - ret = i40iw_manage_qhash(iwdev, - cm_info, - I40IW_QHASH_TYPE_TCP_SYN, - I40IW_QHASH_MANAGE_TYPE_ADD, - NULL, - true); - if (!ret) { - child_listen_node->qhash_set = true; - spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); - list_add(&child_listen_node->child_listen_list, - &cm_parent_listen_node->child_listen_list); - spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); - } else { - kfree(child_listen_node); - cm_parent_listen_node->cm_core->stats_listen_nodes_created--; - } - } - - in_dev_put(idev); - } - } -exit: - rtnl_unlock(); - return ret; -} - -/** - * i40iw_dec_refcnt_listen - delete listener and associated cm nodes - * @cm_core: cm's core - * @listener: passive connection's listener - * @free_hanging_nodes: to free associated cm_nodes - * @apbvt_del: flag to delete the apbvt - */ -static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, - struct i40iw_cm_listener *listener, - int free_hanging_nodes, bool apbvt_del) -{ - int ret = -EINVAL; - int err = 0; - struct list_head *list_pos; - struct list_head *list_temp; - struct i40iw_cm_node *cm_node; - struct list_head reset_list; - struct i40iw_cm_info nfo; - struct i40iw_cm_node *loopback; - enum i40iw_cm_node_state old_state; - unsigned long flags; - - /* free non-accelerated child nodes for this listener */ - INIT_LIST_HEAD(&reset_list); - if (free_hanging_nodes) { - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_for_each_safe(list_pos, - list_temp, &cm_core->non_accelerated_list) { - cm_node = container_of(list_pos, struct i40iw_cm_node, list); - if ((cm_node->listener == listener) && - !cm_node->accelerated) { - atomic_inc(&cm_node->ref_count); - list_add(&cm_node->reset_entry, &reset_list); - } - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - } - - list_for_each_safe(list_pos, list_temp, &reset_list) { - cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); - loopback = cm_node->loopbackpartner; - if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { - i40iw_rem_ref_cm_node(cm_node); - } else { - if (!loopback) { - i40iw_cleanup_retrans_entry(cm_node); - err = i40iw_send_reset(cm_node); - if (err) { - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_pr_err("send reset\n"); - } else { - old_state = cm_node->state; - cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; - if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) - i40iw_rem_ref_cm_node(cm_node); - } - } else { - struct i40iw_cm_event event; - - event.cm_node = loopback; - memcpy(event.cm_info.rem_addr, - loopback->rem_addr, sizeof(event.cm_info.rem_addr)); - memcpy(event.cm_info.loc_addr, - loopback->loc_addr, sizeof(event.cm_info.loc_addr)); - event.cm_info.rem_port = loopback->rem_port; - event.cm_info.loc_port = loopback->loc_port; - event.cm_info.cm_id = loopback->cm_id; - event.cm_info.ipv4 = loopback->ipv4; - atomic_inc(&loopback->ref_count); - loopback->state = I40IW_CM_STATE_CLOSED; - i40iw_event_connect_error(&event); - cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; - i40iw_rem_ref_cm_node(cm_node); - } - } - } - - if (!atomic_dec_return(&listener->ref_count)) { - spin_lock_irqsave(&cm_core->listen_list_lock, flags); - list_del(&listener->list); - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - - if (listener->iwdev) { - if (apbvt_del) - i40iw_manage_apbvt(listener->iwdev, - listener->loc_port, - I40IW_MANAGE_APBVT_DEL); - - memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); - nfo.loc_port = listener->loc_port; - nfo.ipv4 = listener->ipv4; - nfo.vlan_id = listener->vlan_id; - nfo.user_pri = listener->user_pri; - - if (!list_empty(&listener->child_listen_list)) { - i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); - } else { - if (listener->qhash_set) - i40iw_manage_qhash(listener->iwdev, - &nfo, - I40IW_QHASH_TYPE_TCP_SYN, - I40IW_QHASH_MANAGE_TYPE_DELETE, - NULL, - false); - } - } - - cm_core->stats_listen_destroyed++; - kfree(listener); - cm_core->stats_listen_nodes_destroyed++; - listener = NULL; - ret = 0; - } - - if (listener) { - if (atomic_read(&listener->pend_accepts_cnt) > 0) - i40iw_debug(cm_core->dev, - I40IW_DEBUG_CM, - "%s: listener (%p) pending accepts=%u\n", - __func__, - listener, - atomic_read(&listener->pend_accepts_cnt)); - } - - return ret; -} - -/** - * i40iw_cm_del_listen - delete a linstener - * @cm_core: cm's core - * @listener: passive connection's listener - * @apbvt_del: flag to delete apbvt - */ -static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, - struct i40iw_cm_listener *listener, - bool apbvt_del) -{ - listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; - listener->cm_id = NULL; /* going to be destroyed pretty soon */ - return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); -} - -/** - * i40iw_addr_resolve_neigh - resolve neighbor address - * @iwdev: iwarp device structure - * @src_ip: local ip address - * @dst_ip: remote ip address - * @arpindex: if there is an arp entry - */ -static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, - u32 src_ip, - u32 dst_ip, - int arpindex) -{ - struct rtable *rt; - struct neighbour *neigh; - int rc = arpindex; - __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; - } - - neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); - - rcu_read_lock(); - if (neigh) { - if (neigh->nud_state & NUD_VALID) { - if (arpindex >= 0) { - if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, - neigh->ha)) - /* Mac address same as arp table */ - goto resolve_neigh_exit; - i40iw_manage_arp_cache(iwdev, - iwdev->arp_table[arpindex].mac_addr, - &dst_ip, - true, - I40IW_ARP_DELETE); - } - - i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); - rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); - } else { - neigh_event_send(neigh, NULL); - } - } - resolve_neigh_exit: - - rcu_read_unlock(); - if (neigh) - neigh_release(neigh); - - ip_rt_put(rt); - return rc; -} - -/* - * i40iw_get_dst_ipv6 - */ -static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, - struct sockaddr_in6 *dst_addr) -{ - struct dst_entry *dst; - struct flowi6 fl6; - - memset(&fl6, 0, sizeof(fl6)); - fl6.daddr = dst_addr->sin6_addr; - fl6.saddr = src_addr->sin6_addr; - if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) - fl6.flowi6_oif = dst_addr->sin6_scope_id; - - dst = ip6_route_output(&init_net, NULL, &fl6); - return dst; -} - -/** - * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address - * @iwdev: iwarp device structure - * @src: source ip address - * @dest: remote ip address - * @arpindex: if there is an arp entry - */ -static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, - u32 *src, - u32 *dest, - int arpindex) -{ - struct neighbour *neigh; - int rc = arpindex; - struct 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) { - i40iw_pr_err("ip6_route_output returned dst->error = %d\n", - dst->error); - dst_release(dst); - } - return rc; - } - - neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); - - rcu_read_lock(); - if (neigh) { - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); - if (neigh->nud_state & NUD_VALID) { - if (arpindex >= 0) { - if (ether_addr_equal - (iwdev->arp_table[arpindex].mac_addr, - neigh->ha)) { - /* Mac address same as in arp table */ - goto resolve_neigh_exit6; - } - i40iw_manage_arp_cache(iwdev, - iwdev->arp_table[arpindex].mac_addr, - dest, - false, - I40IW_ARP_DELETE); - } - i40iw_manage_arp_cache(iwdev, - neigh->ha, - dest, - false, - I40IW_ARP_ADD); - rc = i40iw_arp_table(iwdev, - dest, - false, - NULL, - I40IW_ARP_RESOLVE); - } else { - neigh_event_send(neigh, NULL); - } - } - - resolve_neigh_exit6: - rcu_read_unlock(); - if (neigh) - neigh_release(neigh); - dst_release(dst); - return rc; -} - -/** - * i40iw_ipv4_is_loopback - check if loopback - * @loc_addr: local addr to compare - * @rem_addr: remote address - */ -static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) -{ - return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); -} - -/** - * i40iw_ipv6_is_loopback - check if loopback - * @loc_addr: local addr to compare - * @rem_addr: remote address - */ -static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) -{ - struct in6_addr raddr6; - - i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); - return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); -} - -/** - * i40iw_make_cm_node - create a new instance of a cm node - * @cm_core: cm's core - * @iwdev: iwarp device structure - * @cm_info: quad info for connection - * @listener: passive connection's listener - */ -static struct i40iw_cm_node *i40iw_make_cm_node( - struct i40iw_cm_core *cm_core, - struct i40iw_device *iwdev, - struct i40iw_cm_info *cm_info, - struct i40iw_cm_listener *listener) -{ - struct i40iw_cm_node *cm_node; - int oldarpindex; - int arpindex; - struct net_device *netdev = iwdev->netdev; - - /* create an hte and cm_node for this instance */ - cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); - if (!cm_node) - return NULL; - - /* set our node specific transport info */ - cm_node->ipv4 = cm_info->ipv4; - cm_node->vlan_id = cm_info->vlan_id; - if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb) - cm_node->vlan_id = 0; - cm_node->tos = cm_info->tos; - cm_node->user_pri = cm_info->user_pri; - if (listener) { - if (listener->tos != cm_info->tos) - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, - "application TOS[%d] and remote client TOS[%d] mismatch\n", - listener->tos, cm_info->tos); - cm_node->tos = max(listener->tos, cm_info->tos); - cm_node->user_pri = rt_tos2priority(cm_node->tos); - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n", - cm_node->tos, cm_node->user_pri); - } - memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); - memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); - cm_node->loc_port = cm_info->loc_port; - cm_node->rem_port = cm_info->rem_port; - - cm_node->mpa_frame_rev = iwdev->mpa_version; - cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; - cm_node->ird_size = I40IW_MAX_IRD_SIZE; - cm_node->ord_size = I40IW_MAX_ORD_SIZE; - - cm_node->listener = listener; - cm_node->cm_id = cm_info->cm_id; - ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); - spin_lock_init(&cm_node->retrans_list_lock); - cm_node->ack_rcvd = false; - - atomic_set(&cm_node->ref_count, 1); - /* associate our parent CM core */ - cm_node->cm_core = cm_core; - cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; - cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; - cm_node->tcp_cntxt.rcv_wnd = - I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; - if (cm_node->ipv4) { - cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), - htonl(cm_node->rem_addr[0]), - htons(cm_node->loc_port), - htons(cm_node->rem_port)); - cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4; - } else if (IS_ENABLED(CONFIG_IPV6)) { - __be32 loc[4] = { - htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), - htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) - }; - __be32 rem[4] = { - htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), - htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) - }; - cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, - htons(cm_node->loc_port), - htons(cm_node->rem_port)); - cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6; - } - - cm_node->iwdev = iwdev; - cm_node->dev = &iwdev->sc_dev; - - if ((cm_node->ipv4 && - i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || - (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, - cm_node->rem_addr))) { - arpindex = i40iw_arp_table(iwdev, - cm_node->rem_addr, - false, - NULL, - I40IW_ARP_RESOLVE); - } else { - oldarpindex = i40iw_arp_table(iwdev, - cm_node->rem_addr, - false, - NULL, - I40IW_ARP_RESOLVE); - if (cm_node->ipv4) - arpindex = i40iw_addr_resolve_neigh(iwdev, - cm_info->loc_addr[0], - cm_info->rem_addr[0], - oldarpindex); - else if (IS_ENABLED(CONFIG_IPV6)) - arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, - cm_info->loc_addr, - cm_info->rem_addr, - oldarpindex); - else - arpindex = -EINVAL; - } - if (arpindex < 0) { - i40iw_pr_err("cm_node arpindex\n"); - kfree(cm_node); - return NULL; - } - ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); - i40iw_add_hte_node(cm_core, cm_node); - cm_core->stats_nodes_created++; - return cm_node; -} - -/** - * i40iw_rem_ref_cm_node - destroy an instance of a cm node - * @cm_node: connection's node - */ -static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) -{ - struct i40iw_cm_core *cm_core = cm_node->cm_core; - struct i40iw_qp *iwqp; - struct i40iw_cm_info nfo; - unsigned long flags; - - spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); - if (atomic_dec_return(&cm_node->ref_count)) { - spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); - return; - } - list_del(&cm_node->list); - spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); - - /* if the node is destroyed before connection was accelerated */ - if (!cm_node->accelerated && cm_node->accept_pend) { - pr_err("node destroyed before established\n"); - atomic_dec(&cm_node->listener->pend_accepts_cnt); - } - if (cm_node->close_entry) - i40iw_handle_close_entry(cm_node, 0); - if (cm_node->listener) { - i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); - } else { - if (cm_node->apbvt_set) { - i40iw_manage_apbvt(cm_node->iwdev, - cm_node->loc_port, - I40IW_MANAGE_APBVT_DEL); - cm_node->apbvt_set = 0; - } - i40iw_get_addr_info(cm_node, &nfo); - if (cm_node->qhash_set) { - i40iw_manage_qhash(cm_node->iwdev, - &nfo, - I40IW_QHASH_TYPE_TCP_ESTABLISHED, - I40IW_QHASH_MANAGE_TYPE_DELETE, - NULL, - false); - cm_node->qhash_set = 0; - } - } - - iwqp = cm_node->iwqp; - if (iwqp) { - iwqp->cm_node = NULL; - i40iw_qp_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_inc(&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); - fallthrough; - case I40IW_CM_STATE_TIME_WAIT: - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_rem_ref_cm_node(cm_node); - break; - default: - break; - } -} - -/** - * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer - * @cm_node: connection's node - * @rbuf: receive buffer - */ -static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *rbuf) -{ - int ret; - int datasize = rbuf->datalen; - u8 *dataloc = rbuf->data; - - enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; - u32 res_type; - - ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); - if (ret) { - if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) - i40iw_active_open_err(cm_node, true); - else - i40iw_passive_open_err(cm_node, true); - return; - } - - switch (cm_node->state) { - case I40IW_CM_STATE_ESTABLISHED: - if (res_type == I40IW_MPA_REQUEST_REJECT) - i40iw_pr_err("state for reject\n"); - cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; - type = I40IW_CM_EVENT_MPA_REQ; - i40iw_send_ack(cm_node); /* ACK received MPA request */ - atomic_set(&cm_node->passive_state, - I40IW_PASSIVE_STATE_INDICATED); - break; - case I40IW_CM_STATE_MPAREQ_SENT: - i40iw_cleanup_retrans_entry(cm_node); - if (res_type == I40IW_MPA_REQUEST_REJECT) { - type = I40IW_CM_EVENT_MPA_REJECT; - cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; - } else { - type = I40IW_CM_EVENT_CONNECTED; - cm_node->state = I40IW_CM_STATE_OFFLOADED; - } - i40iw_send_ack(cm_node); - break; - default: - pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); - break; - } - i40iw_create_event(cm_node, type); -} - -/** - * i40iw_indicate_pkt_err - Send up err event to cm - * @cm_node: connection's node - */ -static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) -{ - switch (cm_node->state) { - case I40IW_CM_STATE_SYN_SENT: - case I40IW_CM_STATE_MPAREQ_SENT: - i40iw_active_open_err(cm_node, true); - break; - case I40IW_CM_STATE_ESTABLISHED: - case I40IW_CM_STATE_SYN_RCVD: - i40iw_passive_open_err(cm_node, true); - break; - case I40IW_CM_STATE_OFFLOADED: - default: - break; - } -} - -/** - * i40iw_check_syn - Check for error on received syn ack - * @cm_node: connection's node - * @tcph: pointer tcp header - */ -static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) -{ - int err = 0; - - if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { - err = 1; - i40iw_active_open_err(cm_node, true); - } - return err; -} - -/** - * i40iw_check_seq - check seq numbers if OK - * @cm_node: connection's node - * @tcph: pointer tcp header - */ -static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) -{ - int err = 0; - u32 seq; - u32 ack_seq; - u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; - u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; - u32 rcv_wnd; - - seq = ntohl(tcph->seq); - ack_seq = ntohl(tcph->ack_seq); - rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; - if (ack_seq != loc_seq_num) - err = -1; - else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) - err = -1; - if (err) { - i40iw_pr_err("seq number\n"); - i40iw_indicate_pkt_err(cm_node); - } - return err; -} - -/** - * i40iw_handle_syn_pkt - is for Passive node - * @cm_node: connection's node - * @rbuf: receive buffer - */ -static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *rbuf) -{ - struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; - int ret; - u32 inc_sequence; - int optionsize; - struct i40iw_cm_info nfo; - - optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); - inc_sequence = ntohl(tcph->seq); - - switch (cm_node->state) { - case I40IW_CM_STATE_SYN_SENT: - case I40IW_CM_STATE_MPAREQ_SENT: - /* Rcvd syn on active open connection */ - i40iw_active_open_err(cm_node, 1); - break; - case I40IW_CM_STATE_LISTENING: - /* Passive OPEN */ - if (atomic_read(&cm_node->listener->pend_accepts_cnt) > - cm_node->listener->backlog) { - cm_node->cm_core->stats_backlog_drops++; - i40iw_passive_open_err(cm_node, false); - break; - } - ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); - if (ret) { - i40iw_passive_open_err(cm_node, false); - /* drop pkt */ - break; - } - cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; - cm_node->accept_pend = 1; - atomic_inc(&cm_node->listener->pend_accepts_cnt); - - cm_node->state = I40IW_CM_STATE_SYN_RCVD; - i40iw_get_addr_info(cm_node, &nfo); - ret = i40iw_manage_qhash(cm_node->iwdev, - &nfo, - I40IW_QHASH_TYPE_TCP_ESTABLISHED, - I40IW_QHASH_MANAGE_TYPE_ADD, - (void *)cm_node, - false); - cm_node->qhash_set = true; - break; - case I40IW_CM_STATE_CLOSED: - i40iw_cleanup_retrans_entry(cm_node); - atomic_inc(&cm_node->ref_count); - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_OFFLOADED: - case I40IW_CM_STATE_ESTABLISHED: - case I40IW_CM_STATE_FIN_WAIT1: - case I40IW_CM_STATE_FIN_WAIT2: - case I40IW_CM_STATE_MPAREQ_RCVD: - case I40IW_CM_STATE_LAST_ACK: - case I40IW_CM_STATE_CLOSING: - case I40IW_CM_STATE_UNKNOWN: - default: - break; - } -} - -/** - * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) - * @cm_node: connection's node - * @rbuf: receive buffer - */ -static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *rbuf) -{ - struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; - int ret; - u32 inc_sequence; - int optionsize; - - optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); - inc_sequence = ntohl(tcph->seq); - switch (cm_node->state) { - case I40IW_CM_STATE_SYN_SENT: - i40iw_cleanup_retrans_entry(cm_node); - /* active open */ - if (i40iw_check_syn(cm_node, tcph)) { - i40iw_pr_err("check syn fail\n"); - return; - } - cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); - /* setup options */ - ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); - if (ret) { - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "cm_node=%p tcp_options failed\n", - cm_node); - break; - } - i40iw_cleanup_retrans_entry(cm_node); - cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; - i40iw_send_ack(cm_node); /* ACK for the syn_ack */ - ret = i40iw_send_mpa_request(cm_node); - if (ret) { - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "cm_node=%p i40iw_send_mpa_request failed\n", - cm_node); - break; - } - cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; - break; - case I40IW_CM_STATE_MPAREQ_RCVD: - i40iw_passive_open_err(cm_node, true); - break; - case I40IW_CM_STATE_LISTENING: - cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); - i40iw_cleanup_retrans_entry(cm_node); - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_CLOSED: - cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); - i40iw_cleanup_retrans_entry(cm_node); - atomic_inc(&cm_node->ref_count); - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_ESTABLISHED: - case I40IW_CM_STATE_FIN_WAIT1: - case I40IW_CM_STATE_FIN_WAIT2: - case I40IW_CM_STATE_LAST_ACK: - case I40IW_CM_STATE_OFFLOADED: - case I40IW_CM_STATE_CLOSING: - case I40IW_CM_STATE_UNKNOWN: - case I40IW_CM_STATE_MPAREQ_SENT: - default: - break; - } -} - -/** - * i40iw_handle_ack_pkt - process packet with ACK - * @cm_node: connection's node - * @rbuf: receive buffer - */ -static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *rbuf) -{ - struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; - u32 inc_sequence; - int ret = 0; - int optionsize; - u32 datasize = rbuf->datalen; - - optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); - - if (i40iw_check_seq(cm_node, tcph)) - return -EINVAL; - - inc_sequence = ntohl(tcph->seq); - switch (cm_node->state) { - case I40IW_CM_STATE_SYN_RCVD: - i40iw_cleanup_retrans_entry(cm_node); - ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); - if (ret) - break; - cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); - cm_node->state = I40IW_CM_STATE_ESTABLISHED; - if (datasize) { - cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; - i40iw_handle_rcv_mpa(cm_node, rbuf); - } - break; - case I40IW_CM_STATE_ESTABLISHED: - i40iw_cleanup_retrans_entry(cm_node); - if (datasize) { - cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; - i40iw_handle_rcv_mpa(cm_node, rbuf); - } - break; - case I40IW_CM_STATE_MPAREQ_SENT: - cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); - if (datasize) { - cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; - cm_node->ack_rcvd = false; - i40iw_handle_rcv_mpa(cm_node, rbuf); - } else { - cm_node->ack_rcvd = true; - } - break; - case I40IW_CM_STATE_LISTENING: - i40iw_cleanup_retrans_entry(cm_node); - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_CLOSED: - i40iw_cleanup_retrans_entry(cm_node); - atomic_inc(&cm_node->ref_count); - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_LAST_ACK: - case I40IW_CM_STATE_CLOSING: - i40iw_cleanup_retrans_entry(cm_node); - cm_node->state = I40IW_CM_STATE_CLOSED; - if (!cm_node->accept_pend) - cm_node->cm_id->rem_ref(cm_node->cm_id); - i40iw_rem_ref_cm_node(cm_node); - break; - case I40IW_CM_STATE_FIN_WAIT1: - i40iw_cleanup_retrans_entry(cm_node); - cm_node->state = I40IW_CM_STATE_FIN_WAIT2; - break; - case I40IW_CM_STATE_SYN_SENT: - case I40IW_CM_STATE_FIN_WAIT2: - case I40IW_CM_STATE_OFFLOADED: - case I40IW_CM_STATE_MPAREQ_RCVD: - case I40IW_CM_STATE_UNKNOWN: - default: - i40iw_cleanup_retrans_entry(cm_node); - break; - } - return ret; -} - -/** - * i40iw_process_packet - process cm packet - * @cm_node: connection's node - * @rbuf: receive buffer - */ -static void i40iw_process_packet(struct i40iw_cm_node *cm_node, - struct i40iw_puda_buf *rbuf) -{ - enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; - struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; - u32 fin_set = 0; - int ret; - - if (tcph->rst) { - pkt_type = I40IW_PKT_TYPE_RST; - } else if (tcph->syn) { - pkt_type = I40IW_PKT_TYPE_SYN; - if (tcph->ack) - pkt_type = I40IW_PKT_TYPE_SYNACK; - } else if (tcph->ack) { - pkt_type = I40IW_PKT_TYPE_ACK; - } - if (tcph->fin) - fin_set = 1; - - switch (pkt_type) { - case I40IW_PKT_TYPE_SYN: - i40iw_handle_syn_pkt(cm_node, rbuf); - break; - case I40IW_PKT_TYPE_SYNACK: - i40iw_handle_synack_pkt(cm_node, rbuf); - break; - case I40IW_PKT_TYPE_ACK: - ret = i40iw_handle_ack_pkt(cm_node, rbuf); - if (fin_set && !ret) - i40iw_handle_fin_pkt(cm_node); - break; - case I40IW_PKT_TYPE_RST: - i40iw_handle_rst_pkt(cm_node, rbuf); - break; - default: - if (fin_set && - (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) - i40iw_handle_fin_pkt(cm_node); - break; - } -} - -/** - * i40iw_make_listen_node - create a listen node with params - * @cm_core: cm's core - * @iwdev: iwarp device structure - * @cm_info: quad info for connection - */ -static struct i40iw_cm_listener *i40iw_make_listen_node( - struct i40iw_cm_core *cm_core, - struct i40iw_device *iwdev, - struct i40iw_cm_info *cm_info) -{ - struct i40iw_cm_listener *listener; - unsigned long flags; - - /* cannot have multiple matching listeners */ - listener = i40iw_find_listener(cm_core, cm_info->loc_addr, - cm_info->loc_port, - cm_info->vlan_id, - I40IW_CM_LISTENER_EITHER_STATE); - if (listener && - (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { - atomic_dec(&listener->ref_count); - i40iw_debug(cm_core->dev, - I40IW_DEBUG_CM, - "Not creating listener since it already exists\n"); - return NULL; - } - - if (!listener) { - /* create a CM listen node (1/2 node to compare incoming traffic to) */ - listener = kzalloc(sizeof(*listener), GFP_KERNEL); - if (!listener) - return NULL; - cm_core->stats_listen_nodes_created++; - memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); - listener->loc_port = cm_info->loc_port; - - INIT_LIST_HEAD(&listener->child_listen_list); - - atomic_set(&listener->ref_count, 1); - } else { - listener->reused_node = 1; - } - - listener->cm_id = cm_info->cm_id; - listener->ipv4 = cm_info->ipv4; - listener->vlan_id = cm_info->vlan_id; - atomic_set(&listener->pend_accepts_cnt, 0); - listener->cm_core = cm_core; - listener->iwdev = iwdev; - - listener->backlog = cm_info->backlog; - listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; - - if (!listener->reused_node) { - spin_lock_irqsave(&cm_core->listen_list_lock, flags); - list_add(&listener->list, &cm_core->listen_nodes); - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - } - - return listener; -} - -/** - * i40iw_create_cm_node - make a connection node with params - * @cm_core: cm's core - * @iwdev: iwarp device structure - * @conn_param: upper layer connection parameters - * @cm_info: quad info for connection - */ -static struct i40iw_cm_node *i40iw_create_cm_node( - struct i40iw_cm_core *cm_core, - struct i40iw_device *iwdev, - struct iw_cm_conn_param *conn_param, - struct i40iw_cm_info *cm_info) -{ - struct i40iw_cm_node *cm_node; - struct i40iw_cm_listener *loopback_remotelistener; - struct i40iw_cm_node *loopback_remotenode; - struct i40iw_cm_info loopback_cm_info; - - u16 private_data_len = conn_param->private_data_len; - const void *private_data = conn_param->private_data; - - /* create a CM connection node */ - cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); - if (!cm_node) - return ERR_PTR(-ENOMEM); - /* set our node side to client (active) side */ - cm_node->tcp_cntxt.client = 1; - cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; - - i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); - - if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { - loopback_remotelistener = i40iw_find_listener( - cm_core, - cm_info->rem_addr, - cm_node->rem_port, - cm_node->vlan_id, - I40IW_CM_LISTENER_ACTIVE_STATE); - if (!loopback_remotelistener) { - i40iw_rem_ref_cm_node(cm_node); - return ERR_PTR(-ECONNREFUSED); - } else { - loopback_cm_info = *cm_info; - loopback_cm_info.loc_port = cm_info->rem_port; - loopback_cm_info.rem_port = cm_info->loc_port; - loopback_cm_info.cm_id = loopback_remotelistener->cm_id; - loopback_cm_info.ipv4 = cm_info->ipv4; - loopback_remotenode = i40iw_make_cm_node(cm_core, - iwdev, - &loopback_cm_info, - loopback_remotelistener); - if (!loopback_remotenode) { - i40iw_rem_ref_cm_node(cm_node); - return ERR_PTR(-ENOMEM); - } - cm_core->stats_loopbacks++; - loopback_remotenode->loopbackpartner = cm_node; - loopback_remotenode->tcp_cntxt.rcv_wscale = - I40IW_CM_DEFAULT_RCV_WND_SCALE; - cm_node->loopbackpartner = loopback_remotenode; - memcpy(loopback_remotenode->pdata_buf, private_data, - private_data_len); - loopback_remotenode->pdata.size = private_data_len; - - if (loopback_remotenode->ord_size > cm_node->ird_size) - loopback_remotenode->ord_size = - cm_node->ird_size; - - cm_node->state = I40IW_CM_STATE_OFFLOADED; - cm_node->tcp_cntxt.rcv_nxt = - loopback_remotenode->tcp_cntxt.loc_seq_num; - loopback_remotenode->tcp_cntxt.rcv_nxt = - cm_node->tcp_cntxt.loc_seq_num; - cm_node->tcp_cntxt.max_snd_wnd = - loopback_remotenode->tcp_cntxt.rcv_wnd; - loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; - cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; - loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; - cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; - loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; - } - return cm_node; - } - - cm_node->pdata.size = private_data_len; - cm_node->pdata.addr = cm_node->pdata_buf; - - memcpy(cm_node->pdata_buf, private_data, private_data_len); - - cm_node->state = I40IW_CM_STATE_SYN_SENT; - return cm_node; -} - -/** - * i40iw_cm_reject - reject and teardown a connection - * @cm_node: connection's node - * @pdata: 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_inc_return(&cm_node->passive_state); - if (passive_state == I40IW_SEND_RESET_EVENT) { - cm_node->state = I40IW_CM_STATE_CLOSED; - i40iw_rem_ref_cm_node(cm_node); - } else { - if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { - i40iw_rem_ref_cm_node(cm_node); - } else { - ret = i40iw_send_mpa_reject(cm_node, pdata, plen); - if (ret) { - cm_node->state = I40IW_CM_STATE_CLOSED; - err = i40iw_send_reset(cm_node); - if (err) - i40iw_pr_err("send reset failed\n"); - } else { - cm_id->add_ref(cm_id); - } - } - } - } else { - cm_node->cm_id = NULL; - if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { - i40iw_rem_ref_cm_node(cm_node); - i40iw_rem_ref_cm_node(loopback); - } else { - ret = i40iw_send_cm_event(loopback, - loopback->cm_id, - IW_CM_EVENT_CONNECT_REPLY, - -ECONNREFUSED); - i40iw_rem_ref_cm_node(cm_node); - loopback->state = I40IW_CM_STATE_CLOSING; - - cm_id = loopback->cm_id; - i40iw_rem_ref_cm_node(loopback); - cm_id->rem_ref(cm_id); - } - } - - return ret; -} - -/** - * i40iw_cm_close - close of cm connection - * @cm_node: connection's node - */ -static int i40iw_cm_close(struct i40iw_cm_node *cm_node) -{ - int ret = 0; - - if (!cm_node) - return -EINVAL; - - switch (cm_node->state) { - case I40IW_CM_STATE_SYN_RCVD: - case I40IW_CM_STATE_SYN_SENT: - case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: - case I40IW_CM_STATE_ESTABLISHED: - case I40IW_CM_STATE_ACCEPTING: - case I40IW_CM_STATE_MPAREQ_SENT: - case I40IW_CM_STATE_MPAREQ_RCVD: - i40iw_cleanup_retrans_entry(cm_node); - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_CLOSE_WAIT: - cm_node->state = I40IW_CM_STATE_LAST_ACK; - i40iw_send_fin(cm_node); - break; - case I40IW_CM_STATE_FIN_WAIT1: - case I40IW_CM_STATE_FIN_WAIT2: - case I40IW_CM_STATE_LAST_ACK: - case I40IW_CM_STATE_TIME_WAIT: - case I40IW_CM_STATE_CLOSING: - ret = -1; - break; - case I40IW_CM_STATE_LISTENING: - i40iw_cleanup_retrans_entry(cm_node); - i40iw_send_reset(cm_node); - break; - case I40IW_CM_STATE_MPAREJ_RCVD: - case I40IW_CM_STATE_UNKNOWN: - case I40IW_CM_STATE_INITED: - case I40IW_CM_STATE_CLOSED: - case I40IW_CM_STATE_LISTENER_DESTROYED: - i40iw_rem_ref_cm_node(cm_node); - break; - case I40IW_CM_STATE_OFFLOADED: - if (cm_node->send_entry) - i40iw_pr_err("send_entry\n"); - i40iw_rem_ref_cm_node(cm_node); - break; - } - return ret; -} - -/** - * i40iw_receive_ilq - recv an ETHERNET packet, and process it - * through CM - * @vsi: pointer to the vsi structure - * @rbuf: receive buffer - */ -void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf) -{ - struct i40iw_cm_node *cm_node; - struct i40iw_cm_listener *listener; - struct iphdr *iph; - struct ipv6hdr *ip6h; - struct tcphdr *tcph; - struct i40iw_cm_info cm_info; - struct i40iw_sc_dev *dev = vsi->dev; - struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; - struct i40iw_cm_core *cm_core = &iwdev->cm_core; - struct vlan_ethhdr *ethh; - u16 vtag; - - /* if vlan, then maclen = 18 else 14 */ - iph = (struct iphdr *)rbuf->iph; - memset(&cm_info, 0, sizeof(cm_info)); - - i40iw_debug_buf(dev, - I40IW_DEBUG_ILQ, - "RECEIVE ILQ BUFFER", - rbuf->mem.va, - rbuf->totallen); - ethh = (struct vlan_ethhdr *)rbuf->mem.va; - - if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { - vtag = ntohs(ethh->h_vlan_TCI); - cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; - cm_info.vlan_id = vtag & VLAN_VID_MASK; - i40iw_debug(cm_core->dev, - I40IW_DEBUG_CM, - "%s vlan_id=%d\n", - __func__, - cm_info.vlan_id); - } else { - cm_info.vlan_id = I40IW_NO_VLAN; - } - tcph = (struct tcphdr *)rbuf->tcph; - - if (rbuf->ipv4) { - cm_info.loc_addr[0] = ntohl(iph->daddr); - cm_info.rem_addr[0] = ntohl(iph->saddr); - cm_info.ipv4 = true; - cm_info.tos = iph->tos; - } else { - ip6h = (struct ipv6hdr *)rbuf->iph; - i40iw_copy_ip_ntohl(cm_info.loc_addr, - ip6h->daddr.in6_u.u6_addr32); - i40iw_copy_ip_ntohl(cm_info.rem_addr, - ip6h->saddr.in6_u.u6_addr32); - cm_info.ipv4 = false; - cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); - } - cm_info.loc_port = ntohs(tcph->dest); - cm_info.rem_port = ntohs(tcph->source); - cm_node = i40iw_find_node(cm_core, - cm_info.rem_port, - cm_info.rem_addr, - cm_info.loc_port, - cm_info.loc_addr, - true, - false); - - if (!cm_node) { - /* Only type of packet accepted are for */ - /* the PASSIVE open (syn only) */ - if (!tcph->syn || tcph->ack) - return; - listener = - i40iw_find_listener(cm_core, - cm_info.loc_addr, - cm_info.loc_port, - cm_info.vlan_id, - I40IW_CM_LISTENER_ACTIVE_STATE); - if (!listener) { - cm_info.cm_id = NULL; - i40iw_debug(cm_core->dev, - I40IW_DEBUG_CM, - "%s no listener found\n", - __func__); - return; - } - cm_info.cm_id = listener->cm_id; - cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); - if (!cm_node) { - i40iw_debug(cm_core->dev, - I40IW_DEBUG_CM, - "%s allocate node failed\n", - __func__); - atomic_dec(&listener->ref_count); - return; - } - if (!tcph->rst && !tcph->fin) { - cm_node->state = I40IW_CM_STATE_LISTENING; - } else { - i40iw_rem_ref_cm_node(cm_node); - return; - } - atomic_inc(&cm_node->ref_count); - } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { - i40iw_rem_ref_cm_node(cm_node); - return; - } - i40iw_process_packet(cm_node, rbuf); - i40iw_rem_ref_cm_node(cm_node); -} - -/** - * i40iw_setup_cm_core - allocate a top level instance of a cm - * core - * @iwdev: iwarp device structure - */ -int i40iw_setup_cm_core(struct i40iw_device *iwdev) -{ - struct i40iw_cm_core *cm_core = &iwdev->cm_core; - - cm_core->iwdev = iwdev; - cm_core->dev = &iwdev->sc_dev; - - INIT_LIST_HEAD(&cm_core->accelerated_list); - INIT_LIST_HEAD(&cm_core->non_accelerated_list); - INIT_LIST_HEAD(&cm_core->listen_nodes); - - timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0); - - spin_lock_init(&cm_core->ht_lock); - spin_lock_init(&cm_core->listen_list_lock); - spin_lock_init(&cm_core->apbvt_lock); - - cm_core->event_wq = alloc_ordered_workqueue("iwewq", - WQ_MEM_RECLAIM); - if (!cm_core->event_wq) - goto error; - - cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq", - WQ_MEM_RECLAIM); - if (!cm_core->disconn_wq) - goto error; - - return 0; -error: - i40iw_cleanup_cm_core(&iwdev->cm_core); - - return -ENOMEM; -} - -/** - * i40iw_cleanup_cm_core - deallocate a top level instance of a - * cm core - * @cm_core: cm's core - */ -void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) -{ - unsigned long flags; - - if (!cm_core) - return; - - spin_lock_irqsave(&cm_core->ht_lock, flags); - if (timer_pending(&cm_core->tcp_timer)) - del_timer_sync(&cm_core->tcp_timer); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - if (cm_core->event_wq) - destroy_workqueue(cm_core->event_wq); - if (cm_core->disconn_wq) - destroy_workqueue(cm_core->disconn_wq); -} - -/** - * i40iw_init_tcp_ctx - setup qp context - * @cm_node: connection's node - * @tcp_info: offload info for tcp - * @iwqp: associate qp for the connection - */ -static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, - struct i40iw_tcp_offload_info *tcp_info, - struct i40iw_qp *iwqp) -{ - tcp_info->ipv4 = cm_node->ipv4; - tcp_info->drop_ooo_seg = true; - tcp_info->wscale = true; - tcp_info->ignore_tcp_opt = true; - tcp_info->ignore_tcp_uns_opt = true; - tcp_info->no_nagle = false; - - tcp_info->ttl = I40IW_DEFAULT_TTL; - tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); - tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); - tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; - - tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; - tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; - tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; - - tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); - tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); - tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); - tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); - - tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); - tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); - tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); - tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); - tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); - tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << - cm_node->tcp_cntxt.rcv_wscale); - - tcp_info->flow_label = 0; - tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); - if (cm_node->vlan_id <= VLAN_VID_MASK) { - tcp_info->insert_vlan_tag = true; - tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) | - cm_node->vlan_id); - } - if (cm_node->ipv4) { - tcp_info->src_port = cpu_to_le16(cm_node->loc_port); - tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); - - tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]); - tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]); - tcp_info->arp_idx = - cpu_to_le16((u16)i40iw_arp_table( - iwqp->iwdev, - &tcp_info->dest_ip_addr3, - true, - NULL, - I40IW_ARP_RESOLVE)); - } else { - tcp_info->src_port = cpu_to_le16(cm_node->loc_port); - tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); - tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]); - tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]); - tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]); - tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]); - tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]); - tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]); - tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]); - tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]); - tcp_info->arp_idx = - cpu_to_le16((u16)i40iw_arp_table( - iwqp->iwdev, - &tcp_info->dest_ip_addr0, - false, - NULL, - I40IW_ARP_RESOLVE)); - } -} - -/** - * i40iw_cm_init_tsa_conn - setup qp for RTS - * @iwqp: associate qp for the connection - * @cm_node: connection's node - */ -static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, - struct i40iw_cm_node *cm_node) -{ - struct i40iw_tcp_offload_info tcp_info; - struct i40iwarp_offload_info *iwarp_info; - struct i40iw_qp_host_ctx_info *ctx_info; - struct i40iw_device *iwdev = iwqp->iwdev; - struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; - - memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); - iwarp_info = &iwqp->iwarp_info; - ctx_info = &iwqp->ctx_info; - - ctx_info->tcp_info = &tcp_info; - ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; - ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; - - iwarp_info->ord_size = cm_node->ord_size; - iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); - - if (iwarp_info->ord_size == 1) - iwarp_info->ord_size = 2; - - iwarp_info->rd_enable = true; - iwarp_info->rdmap_ver = 1; - iwarp_info->ddp_ver = 1; - - iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; - - ctx_info->tcp_info_valid = true; - ctx_info->iwarp_info_valid = true; - ctx_info->add_to_qoslist = true; - ctx_info->user_pri = cm_node->user_pri; - - i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); - if (cm_node->snd_mark_en) { - iwarp_info->snd_mark_en = true; - iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & - SNDMARKER_SEQNMASK) + cm_node->lsmm_size; - } - - cm_node->state = I40IW_CM_STATE_OFFLOADED; - tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; - tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; - tcp_info.tos = cm_node->tos; - - dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); - - /* once tcp_info is set, no need to do it again */ - ctx_info->tcp_info_valid = false; - ctx_info->iwarp_info_valid = false; - ctx_info->add_to_qoslist = false; -} - -/** - * i40iw_cm_disconn - when a connection is being closed - * @iwqp: associate qp for the connection - */ -void i40iw_cm_disconn(struct i40iw_qp *iwqp) -{ - struct disconn_work *work; - struct i40iw_device *iwdev = iwqp->iwdev; - struct i40iw_cm_core *cm_core = &iwdev->cm_core; - unsigned long flags; - - work = kzalloc(sizeof(*work), GFP_ATOMIC); - if (!work) - return; /* Timer will clean up */ - - spin_lock_irqsave(&iwdev->qptable_lock, flags); - if (!iwdev->qp_table[iwqp->ibqp.qp_num]) { - spin_unlock_irqrestore(&iwdev->qptable_lock, flags); - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, - "%s qp_id %d is already freed\n", - __func__, iwqp->ibqp.qp_num); - kfree(work); - return; - } - i40iw_qp_add_ref(&iwqp->ibqp); - spin_unlock_irqrestore(&iwdev->qptable_lock, flags); - - work->iwqp = iwqp; - INIT_WORK(&work->work, i40iw_disconnect_worker); - queue_work(cm_core->disconn_wq, &work->work); - return; -} - -/** - * i40iw_qp_disconnect - free qp and close cm - * @iwqp: associate qp for the connection - */ -static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) -{ - struct i40iw_device *iwdev; - struct i40iw_ib_device *iwibdev; - - iwdev = to_iwdev(iwqp->ibqp.device); - if (!iwdev) { - i40iw_pr_err("iwdev == NULL\n"); - return; - } - - iwibdev = iwdev->iwibdev; - - if (iwqp->active_conn) { - /* indicate this connection is NOT active */ - iwqp->active_conn = 0; - } else { - /* Need to free the Last Streaming Mode Message */ - if (iwqp->ietf_mem.va) { - if (iwqp->lsmm_mr) - iwibdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, - NULL); - i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); - } - } - - /* close the CM node down if it is still active */ - if (iwqp->cm_node) { - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); - i40iw_cm_close(iwqp->cm_node); - } -} - -/** - * i40iw_cm_disconn_true - called by worker thread to disconnect qp - * @iwqp: associate qp for the connection - */ -static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) -{ - struct iw_cm_id *cm_id; - struct i40iw_device *iwdev; - struct i40iw_sc_qp *qp = &iwqp->sc_qp; - u16 last_ae; - u8 original_hw_tcp_state; - u8 original_ibqp_state; - int disconn_status = 0; - int issue_disconn = 0; - int issue_close = 0; - int issue_flush = 0; - struct ib_event ibevent; - unsigned long flags; - int ret; - - if (!iwqp) { - i40iw_pr_err("iwqp == NULL\n"); - return; - } - - spin_lock_irqsave(&iwqp->lock, flags); - cm_id = iwqp->cm_id; - /* make sure we havent already closed this connection */ - if (!cm_id) { - spin_unlock_irqrestore(&iwqp->lock, flags); - return; - } - - iwdev = to_iwdev(iwqp->ibqp.device); - - original_hw_tcp_state = iwqp->hw_tcp_state; - original_ibqp_state = iwqp->ibqp_state; - last_ae = iwqp->last_aeq; - - if (qp->term_flags) { - issue_disconn = 1; - issue_close = 1; - iwqp->cm_id = NULL; - /*When term timer expires after cm_timer, don't want - *terminate-handler to issue cm_disconn which can re-free - *a QP even after its refcnt=0. - */ - i40iw_terminate_del_timer(qp); - if (!iwqp->flush_issued) { - iwqp->flush_issued = 1; - issue_flush = 1; - } - } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || - ((original_ibqp_state == IB_QPS_RTS) && - (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { - issue_disconn = 1; - if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) - disconn_status = -ECONNRESET; - } - - if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || - (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || - (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || - (last_ae == I40IW_AE_LLP_CONNECTION_RESET) || - iwdev->reset)) { - issue_close = 1; - iwqp->cm_id = NULL; - if (!iwqp->flush_issued) { - iwqp->flush_issued = 1; - issue_flush = 1; - } - } - - spin_unlock_irqrestore(&iwqp->lock, flags); - if (issue_flush && !iwqp->destroyed) { - /* Flush the queues */ - i40iw_flush_wqes(iwdev, iwqp); - - if (qp->term_flags && iwqp->ibqp.event_handler) { - ibevent.device = iwqp->ibqp.device; - ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? - IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; - ibevent.element.qp = &iwqp->ibqp; - iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); - } - } - - if (cm_id && cm_id->event_handler) { - if (issue_disconn) { - ret = i40iw_send_cm_event(NULL, - cm_id, - IW_CM_EVENT_DISCONNECT, - disconn_status); - - if (ret) - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "disconnect event failed %s: - cm_id = %p\n", - __func__, cm_id); - } - if (issue_close) { - i40iw_qp_disconnect(iwqp); - cm_id->provider_data = iwqp; - ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); - if (ret) - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "close event failed %s: - cm_id = %p\n", - __func__, cm_id); - cm_id->rem_ref(cm_id); - } - } -} - -/** - * i40iw_disconnect_worker - worker for connection close - * @work: points or disconn structure - */ -static void i40iw_disconnect_worker(struct work_struct *work) -{ - struct disconn_work *dwork = container_of(work, struct disconn_work, work); - struct i40iw_qp *iwqp = dwork->iwqp; - - kfree(dwork); - i40iw_cm_disconn_true(iwqp); - i40iw_qp_rem_ref(&iwqp->ibqp); -} - -/** - * i40iw_accept - registered call for connection to be accepted - * @cm_id: cm information for passive connection - * @conn_param: accpet parameters - */ -int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) -{ - struct ib_qp *ibqp; - struct i40iw_qp *iwqp; - struct i40iw_device *iwdev; - struct i40iw_sc_dev *dev; - struct i40iw_cm_core *cm_core; - struct i40iw_cm_node *cm_node; - struct ib_qp_attr attr; - int passive_state; - struct ib_mr *ibmr; - struct i40iw_pd *iwpd; - u16 buf_len = 0; - struct i40iw_kmem_info accept; - enum i40iw_status_code status; - u64 tagged_offset; - unsigned long flags; - - memset(&attr, 0, sizeof(attr)); - ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); - if (!ibqp) - return -EINVAL; - - iwqp = to_iwqp(ibqp); - iwdev = iwqp->iwdev; - dev = &iwdev->sc_dev; - cm_core = &iwdev->cm_core; - cm_node = (struct i40iw_cm_node *)cm_id->provider_data; - - if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { - cm_node->ipv4 = true; - cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); - } else { - cm_node->ipv4 = false; - i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id); - } - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "Accept vlan_id=%d\n", - cm_node->vlan_id); - if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { - if (cm_node->loopbackpartner) - i40iw_rem_ref_cm_node(cm_node->loopbackpartner); - i40iw_rem_ref_cm_node(cm_node); - return -EINVAL; - } - - passive_state = atomic_inc_return(&cm_node->passive_state); - if (passive_state == I40IW_SEND_RESET_EVENT) { - i40iw_rem_ref_cm_node(cm_node); - return -ECONNRESET; - } - - cm_node->cm_core->stats_accepts++; - iwqp->cm_node = (void *)cm_node; - cm_node->iwqp = iwqp; - - buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE; - - status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); - - if (status) - return -ENOMEM; - cm_node->pdata.size = conn_param->private_data_len; - accept.addr = iwqp->ietf_mem.va; - accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); - memcpy(accept.addr + accept.size, conn_param->private_data, - conn_param->private_data_len); - - /* setup our first outgoing iWarp send WQE (the IETF frame response) */ - if ((cm_node->ipv4 && - !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || - (!cm_node->ipv4 && - !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { - iwpd = iwqp->iwpd; - tagged_offset = (uintptr_t)iwqp->ietf_mem.va; - ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, - iwqp->ietf_mem.pa, - buf_len, - IB_ACCESS_LOCAL_WRITE, - &tagged_offset); - if (IS_ERR(ibmr)) { - i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); - return -ENOMEM; - } - - ibmr->pd = &iwpd->ibpd; - ibmr->device = iwpd->ibpd.device; - iwqp->lsmm_mr = ibmr; - if (iwqp->page) - iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); - dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, - iwqp->ietf_mem.va, - (accept.size + conn_param->private_data_len), - ibmr->lkey); - - } else { - if (iwqp->page) - iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); - dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0); - } - - if (iwqp->page) - kunmap(iwqp->page); - - iwqp->cm_id = cm_id; - cm_node->cm_id = cm_id; - - cm_id->provider_data = (void *)iwqp; - iwqp->active_conn = 0; - - cm_node->lsmm_size = accept.size + conn_param->private_data_len; - i40iw_cm_init_tsa_conn(iwqp, cm_node); - cm_id->add_ref(cm_id); - i40iw_qp_add_ref(&iwqp->ibqp); - - attr.qp_state = IB_QPS_RTS; - cm_node->qhash_set = false; - i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); - - cm_node->accelerated = true; - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_move_tail(&cm_node->list, &cm_core->accelerated_list); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - status = - i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); - if (status) - i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n"); - - if (cm_node->loopbackpartner) { - cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; - - /* copy entire MPA frame to our cm_node's frame */ - memcpy(cm_node->loopbackpartner->pdata_buf, - conn_param->private_data, - conn_param->private_data_len); - i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); - } - - if (cm_node->accept_pend) { - atomic_dec(&cm_node->listener->pend_accepts_cnt); - cm_node->accept_pend = 0; - } - return 0; -} - -/** - * i40iw_reject - registered call for connection to be rejected - * @cm_id: cm information for passive connection - * @pdata: private data to be sent - * @pdata_len: private data length - */ -int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) -{ - struct i40iw_device *iwdev; - struct i40iw_cm_node *cm_node; - struct i40iw_cm_node *loopback; - - cm_node = (struct i40iw_cm_node *)cm_id->provider_data; - loopback = cm_node->loopbackpartner; - cm_node->cm_id = cm_id; - cm_node->pdata.size = pdata_len; - - iwdev = to_iwdev(cm_id->device); - if (!iwdev) - return -EINVAL; - cm_node->cm_core->stats_rejects++; - - if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) - return -EINVAL; - - if (loopback) { - memcpy(&loopback->pdata_buf, pdata, pdata_len); - loopback->pdata.size = pdata_len; - } - - return i40iw_cm_reject(cm_node, pdata, pdata_len); -} - -/** - * i40iw_connect - registered call for connection to be established - * @cm_id: cm information for passive connection - * @conn_param: Information about the connection - */ -int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) -{ - struct ib_qp *ibqp; - struct i40iw_qp *iwqp; - struct i40iw_device *iwdev; - struct i40iw_cm_node *cm_node; - struct i40iw_cm_info cm_info; - struct sockaddr_in *laddr; - struct sockaddr_in *raddr; - struct sockaddr_in6 *laddr6; - struct sockaddr_in6 *raddr6; - int ret = 0; - - ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); - if (!ibqp) - return -EINVAL; - iwqp = to_iwqp(ibqp); - if (!iwqp) - return -EINVAL; - iwdev = to_iwdev(iwqp->ibqp.device); - if (!iwdev) - return -EINVAL; - - laddr = (struct sockaddr_in *)&cm_id->m_local_addr; - raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; - laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; - raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; - - if (!(laddr->sin_port) || !(raddr->sin_port)) - return -EINVAL; - - iwqp->active_conn = 1; - iwqp->cm_id = NULL; - cm_id->provider_data = iwqp; - - /* set up the connection params for the node */ - if (cm_id->remote_addr.ss_family == AF_INET) { - cm_info.ipv4 = true; - memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); - memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); - cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); - cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); - cm_info.loc_port = ntohs(laddr->sin_port); - cm_info.rem_port = ntohs(raddr->sin_port); - cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); - } else { - cm_info.ipv4 = false; - i40iw_copy_ip_ntohl(cm_info.loc_addr, - laddr6->sin6_addr.in6_u.u6_addr32); - i40iw_copy_ip_ntohl(cm_info.rem_addr, - raddr6->sin6_addr.in6_u.u6_addr32); - cm_info.loc_port = ntohs(laddr6->sin6_port); - cm_info.rem_port = ntohs(raddr6->sin6_port); - i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id); - } - cm_info.cm_id = cm_id; - cm_info.tos = cm_id->tos; - cm_info.user_pri = rt_tos2priority(cm_id->tos); - i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n", - __func__, cm_id->tos, cm_info.user_pri); - cm_id->add_ref(cm_id); - cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, - conn_param, &cm_info); - - if (IS_ERR(cm_node)) { - ret = PTR_ERR(cm_node); - cm_id->rem_ref(cm_id); - return ret; - } - - if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || - (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, - raddr6->sin6_addr.in6_u.u6_addr32, - sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { - if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED, - I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) { - ret = -EINVAL; - goto err; - } - cm_node->qhash_set = true; - } - - if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, - I40IW_MANAGE_APBVT_ADD)) { - ret = -EINVAL; - goto err; - } - - cm_node->apbvt_set = true; - iwqp->cm_node = cm_node; - cm_node->iwqp = iwqp; - iwqp->cm_id = cm_id; - i40iw_qp_add_ref(&iwqp->ibqp); - - if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { - cm_node->state = I40IW_CM_STATE_SYN_SENT; - ret = i40iw_send_syn(cm_node, 0); - if (ret) - goto err; - } - - if (cm_node->loopbackpartner) { - cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD; - i40iw_create_event(cm_node->loopbackpartner, - I40IW_CM_EVENT_MPA_REQ); - } - - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", - cm_node->rem_port, - cm_node, - cm_node->cm_id); - - return 0; - -err: - if (cm_info.ipv4) - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "Api - connect() FAILED: dest addr=%pI4", - cm_info.rem_addr); - else - i40iw_debug(&iwdev->sc_dev, - I40IW_DEBUG_CM, - "Api - connect() FAILED: dest addr=%pI6", - cm_info.rem_addr); - - i40iw_rem_ref_cm_node(cm_node); - cm_id->rem_ref(cm_id); - iwdev->cm_core.stats_connect_errs++; - return ret; -} - -/** - * i40iw_create_listen - registered call creating listener - * @cm_id: cm information for passive connection - * @backlog: to max accept pending count - */ -int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) -{ - struct i40iw_device *iwdev; - struct i40iw_cm_listener *cm_listen_node; - struct i40iw_cm_info cm_info; - enum i40iw_status_code ret; - struct sockaddr_in *laddr; - struct sockaddr_in6 *laddr6; - bool wildcard = false; - - iwdev = to_iwdev(cm_id->device); - if (!iwdev) - return -EINVAL; - - laddr = (struct sockaddr_in *)&cm_id->m_local_addr; - laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; - memset(&cm_info, 0, sizeof(cm_info)); - if (laddr->sin_family == AF_INET) { - cm_info.ipv4 = true; - cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); - cm_info.loc_port = ntohs(laddr->sin_port); - - if (laddr->sin_addr.s_addr != INADDR_ANY) - cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); - else - wildcard = true; - - } else { - cm_info.ipv4 = false; - i40iw_copy_ip_ntohl(cm_info.loc_addr, - laddr6->sin6_addr.in6_u.u6_addr32); - cm_info.loc_port = ntohs(laddr6->sin6_port); - if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) - i40iw_netdev_vlan_ipv6(cm_info.loc_addr, - &cm_info.vlan_id); - else - wildcard = true; - } - cm_info.backlog = backlog; - cm_info.cm_id = cm_id; - - cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); - if (!cm_listen_node) { - i40iw_pr_err("cm_listen_node == NULL\n"); - return -ENOMEM; - } - - cm_id->provider_data = cm_listen_node; - - cm_listen_node->tos = cm_id->tos; - cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); - cm_info.user_pri = cm_listen_node->user_pri; - - if (!cm_listen_node->reused_node) { - if (wildcard) { - if (cm_info.ipv4) - ret = i40iw_add_mqh_4(iwdev, - &cm_info, - cm_listen_node); - else - ret = i40iw_add_mqh_6(iwdev, - &cm_info, - cm_listen_node); - if (ret) - goto error; - - ret = i40iw_manage_apbvt(iwdev, - cm_info.loc_port, - I40IW_MANAGE_APBVT_ADD); - - if (ret) - goto error; - } else { - ret = i40iw_manage_qhash(iwdev, - &cm_info, - I40IW_QHASH_TYPE_TCP_SYN, - I40IW_QHASH_MANAGE_TYPE_ADD, - NULL, - true); - if (ret) - goto error; - cm_listen_node->qhash_set = true; - ret = i40iw_manage_apbvt(iwdev, - cm_info.loc_port, - I40IW_MANAGE_APBVT_ADD); - if (ret) - goto error; - } - } - cm_id->add_ref(cm_id); - cm_listen_node->cm_core->stats_listen_created++; - return 0; - error: - i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); - return -EINVAL; -} - -/** - * i40iw_destroy_listen - registered call to destroy listener - * @cm_id: cm information for passive connection - */ -int i40iw_destroy_listen(struct iw_cm_id *cm_id) -{ - struct i40iw_device *iwdev; - - iwdev = to_iwdev(cm_id->device); - if (cm_id->provider_data) - i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); - else - i40iw_pr_err("cm_id->provider_data was NULL\n"); - - cm_id->rem_ref(cm_id); - - return 0; -} - -/** - * i40iw_cm_event_connected - handle connected active node - * @event: the info for cm_node of connection - */ -static void i40iw_cm_event_connected(struct i40iw_cm_event *event) -{ - struct i40iw_qp *iwqp; - struct i40iw_device *iwdev; - struct i40iw_cm_core *cm_core; - struct i40iw_cm_node *cm_node; - struct i40iw_sc_dev *dev; - struct ib_qp_attr attr; - struct iw_cm_id *cm_id; - unsigned long flags; - int status; - bool read0; - - cm_node = event->cm_node; - cm_id = cm_node->cm_id; - iwqp = (struct i40iw_qp *)cm_id->provider_data; - iwdev = to_iwdev(iwqp->ibqp.device); - dev = &iwdev->sc_dev; - cm_core = &iwdev->cm_core; - - if (iwqp->destroyed) { - status = -ETIMEDOUT; - goto error; - } - i40iw_cm_init_tsa_conn(iwqp, cm_node); - read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); - if (iwqp->page) - iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); - dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); - if (iwqp->page) - kunmap(iwqp->page); - - memset(&attr, 0, sizeof(attr)); - attr.qp_state = IB_QPS_RTS; - cm_node->qhash_set = false; - i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); - - cm_node->accelerated = true; - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_move_tail(&cm_node->list, &cm_core->accelerated_list); - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, - 0); - if (status) - i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n"); - - return; - -error: - iwqp->cm_id = NULL; - cm_id->provider_data = NULL; - i40iw_send_cm_event(event->cm_node, - cm_id, - IW_CM_EVENT_CONNECT_REPLY, - status); - cm_id->rem_ref(cm_id); - i40iw_rem_ref_cm_node(event->cm_node); -} - -/** - * i40iw_cm_event_reset - handle reset - * @event: the info for cm_node of connection - */ -static void i40iw_cm_event_reset(struct i40iw_cm_event *event) -{ - struct i40iw_cm_node *cm_node = event->cm_node; - struct iw_cm_id *cm_id = cm_node->cm_id; - struct i40iw_qp *iwqp; - - if (!cm_id) - return; - - iwqp = cm_id->provider_data; - if (!iwqp) - return; - - i40iw_debug(cm_node->dev, - I40IW_DEBUG_CM, - "reset event %p - cm_id = %p\n", - event->cm_node, cm_id); - iwqp->cm_id = NULL; - - i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); - i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); -} - -/** - * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer - * @work: pointer of cm event info. - */ -static void i40iw_cm_event_handler(struct work_struct *work) -{ - struct i40iw_cm_event *event = container_of(work, - struct i40iw_cm_event, - event_work); - struct i40iw_cm_node *cm_node; - - if (!event || !event->cm_node || !event->cm_node->cm_core) - return; - - cm_node = event->cm_node; - - switch (event->type) { - case I40IW_CM_EVENT_MPA_REQ: - i40iw_send_cm_event(cm_node, - cm_node->cm_id, - IW_CM_EVENT_CONNECT_REQUEST, - 0); - break; - case I40IW_CM_EVENT_RESET: - i40iw_cm_event_reset(event); - break; - case I40IW_CM_EVENT_CONNECTED: - if (!event->cm_node->cm_id || - (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) - break; - i40iw_cm_event_connected(event); - break; - case I40IW_CM_EVENT_MPA_REJECT: - if (!event->cm_node->cm_id || - (cm_node->state == I40IW_CM_STATE_OFFLOADED)) - break; - i40iw_send_cm_event(cm_node, - cm_node->cm_id, - IW_CM_EVENT_CONNECT_REPLY, - -ECONNREFUSED); - break; - case I40IW_CM_EVENT_ABORTED: - if (!event->cm_node->cm_id || - (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) - break; - i40iw_event_connect_error(event); - break; - default: - i40iw_pr_err("event type = %d\n", event->type); - break; - } - - event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); - i40iw_rem_ref_cm_node(event->cm_node); - kfree(event); -} - -/** - * i40iw_cm_post_event - queue event request for worker thread - * @event: cm node's info for up event call - */ -static void i40iw_cm_post_event(struct i40iw_cm_event *event) -{ - atomic_inc(&event->cm_node->ref_count); - event->cm_info.cm_id->add_ref(event->cm_info.cm_id); - INIT_WORK(&event->event_work, i40iw_cm_event_handler); - - queue_work(event->cm_node->cm_core->event_wq, &event->event_work); -} - -/** - * i40iw_qhash_ctrl - enable/disable qhash for list - * @iwdev: device pointer - * @parent_listen_node: parent listen node - * @nfo: cm info node - * @ipaddr: Pointer to IPv4 or IPv6 address - * @ipv4: flag indicating IPv4 when true - * @ifup: flag indicating interface up when true - * - * Enables or disables the qhash for the node in the child - * listen list that matches ipaddr. If no matching IP was found - * it will allocate and add a new child listen node to the - * parent listen node. The listen_list_lock is assumed to be - * held when called. - */ -static void i40iw_qhash_ctrl(struct i40iw_device *iwdev, - struct i40iw_cm_listener *parent_listen_node, - struct i40iw_cm_info *nfo, - u32 *ipaddr, bool ipv4, bool ifup) -{ - struct list_head *child_listen_list = &parent_listen_node->child_listen_list; - struct i40iw_cm_listener *child_listen_node; - struct list_head *pos, *tpos; - enum i40iw_status_code ret; - bool node_allocated = false; - enum i40iw_quad_hash_manage_type op = - ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; - - list_for_each_safe(pos, tpos, child_listen_list) { - child_listen_node = - list_entry(pos, - struct i40iw_cm_listener, - child_listen_list); - if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) - goto set_qhash; - } - - /* if not found then add a child listener if interface is going up */ - if (!ifup) - return; - child_listen_node = kmemdup(parent_listen_node, - sizeof(*child_listen_node), GFP_ATOMIC); - if (!child_listen_node) - return; - node_allocated = true; - - memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); - -set_qhash: - memcpy(nfo->loc_addr, - child_listen_node->loc_addr, - sizeof(nfo->loc_addr)); - nfo->vlan_id = child_listen_node->vlan_id; - ret = i40iw_manage_qhash(iwdev, nfo, - I40IW_QHASH_TYPE_TCP_SYN, - op, - NULL, false); - if (!ret) { - child_listen_node->qhash_set = ifup; - if (node_allocated) - list_add(&child_listen_node->child_listen_list, - &parent_listen_node->child_listen_list); - } else if (node_allocated) { - kfree(child_listen_node); - } -} - -/** - * i40iw_cm_teardown_connections - teardown QPs - * @iwdev: device pointer - * @ipaddr: Pointer to IPv4 or IPv6 address - * @nfo: cm info node - * @disconnect_all: flag indicating disconnect all QPs - * teardown QPs where source or destination addr matches ip addr - */ -void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr, - struct i40iw_cm_info *nfo, - bool disconnect_all) -{ - struct i40iw_cm_core *cm_core = &iwdev->cm_core; - struct list_head *list_core_temp; - struct list_head *list_node; - struct i40iw_cm_node *cm_node; - unsigned long flags; - struct list_head teardown_list; - struct ib_qp_attr attr; - - INIT_LIST_HEAD(&teardown_list); - spin_lock_irqsave(&cm_core->ht_lock, flags); - list_for_each_safe(list_node, list_core_temp, - &cm_core->accelerated_list) { - cm_node = container_of(list_node, struct i40iw_cm_node, list); - if (disconnect_all || - (nfo->vlan_id == cm_node->vlan_id && - (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || - !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { - atomic_inc(&cm_node->ref_count); - list_add(&cm_node->teardown_entry, &teardown_list); - } - } - list_for_each_safe(list_node, list_core_temp, - &cm_core->non_accelerated_list) { - cm_node = container_of(list_node, struct i40iw_cm_node, list); - if (disconnect_all || - (nfo->vlan_id == cm_node->vlan_id && - (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || - !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { - atomic_inc(&cm_node->ref_count); - list_add(&cm_node->teardown_entry, &teardown_list); - } - } - spin_unlock_irqrestore(&cm_core->ht_lock, flags); - - list_for_each_safe(list_node, list_core_temp, &teardown_list) { - cm_node = container_of(list_node, struct i40iw_cm_node, - teardown_entry); - attr.qp_state = IB_QPS_ERR; - i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); - if (iwdev->reset) - i40iw_cm_disconn(cm_node->iwqp); - i40iw_rem_ref_cm_node(cm_node); - } -} - -/** - * i40iw_if_notify - process an ifdown on an interface - * @iwdev: device pointer - * @netdev: network interface device structure - * @ipaddr: Pointer to IPv4 or IPv6 address - * @ipv4: flag indicating IPv4 when true - * @ifup: flag indicating interface up when true - */ -void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev, - u32 *ipaddr, bool ipv4, bool ifup) -{ - struct i40iw_cm_core *cm_core = &iwdev->cm_core; - unsigned long flags; - struct i40iw_cm_listener *listen_node; - static const u32 ip_zero[4] = { 0, 0, 0, 0 }; - struct i40iw_cm_info nfo; - u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); - enum i40iw_status_code ret; - enum i40iw_quad_hash_manage_type op = - ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; - - nfo.vlan_id = vlan_id; - nfo.ipv4 = ipv4; - - /* Disable or enable qhash for listeners */ - spin_lock_irqsave(&cm_core->listen_list_lock, flags); - list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { - if (vlan_id == listen_node->vlan_id && - (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) || - !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) { - memcpy(nfo.loc_addr, listen_node->loc_addr, - sizeof(nfo.loc_addr)); - nfo.loc_port = listen_node->loc_port; - nfo.user_pri = listen_node->user_pri; - if (!list_empty(&listen_node->child_listen_list)) { - i40iw_qhash_ctrl(iwdev, - listen_node, - &nfo, - ipaddr, ipv4, ifup); - } else if (memcmp(listen_node->loc_addr, ip_zero, - ipv4 ? 4 : 16)) { - ret = i40iw_manage_qhash(iwdev, - &nfo, - I40IW_QHASH_TYPE_TCP_SYN, - op, - NULL, - false); - if (!ret) - listen_node->qhash_set = ifup; - } - } - } - spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); - - /* teardown connected qp's on ifdown */ - if (!ifup) - i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false); -} |