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tegrakernel/kernel/kernel-4.9/drivers/infiniband/hw/i40iw/i40iw_cm.c

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/*******************************************************************************
*
* Copyright (c) 2015-2016 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenFabrics.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*******************************************************************************/
#include <linux/atomic.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/init.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/notifier.h>
#include <linux/net.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/time.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/random.h>
#include <linux/list.h>
#include <linux/threads.h>
#include <linux/highmem.h>
#include <net/arp.h>
#include <net/ndisc.h>
#include <net/neighbour.h>
#include <net/route.h>
#include <net/addrconf.h>
#include <net/ip6_route.h>
#include <net/ip_fib.h>
#include <net/tcp.h>
#include <asm/checksum.h>
#include "i40iw.h"
static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
static void i40iw_cm_post_event(struct i40iw_cm_event *event);
static void i40iw_disconnect_worker(struct work_struct *work);
/**
* i40iw_free_sqbuf - put back puda buffer if refcount = 0
* @dev: FPK device
* @buf: puda buffer to free
*/
void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
{
struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
struct i40iw_puda_rsrc *ilq = dev->ilq;
if (!atomic_dec_return(&buf->refcount))
i40iw_puda_ret_bufpool(ilq, buf);
}
/**
* i40iw_derive_hw_ird_setting - Calculate IRD
*
* @cm_ird: IRD of connection's node
*
* The ird from the connection is rounded to a supported HW
* setting (2,8,32,64) and then encoded for ird_size field of
* qp_ctx
*/
static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
{
u8 encoded_ird_size;
u8 pof2_cm_ird = 1;
/* round-off to next powerof2 */
while (pof2_cm_ird < cm_ird)
pof2_cm_ird *= 2;
/* ird_size field is encoded in qp_ctx */
switch (pof2_cm_ird) {
case I40IW_HW_IRD_SETTING_64:
encoded_ird_size = 3;
break;
case I40IW_HW_IRD_SETTING_32:
case I40IW_HW_IRD_SETTING_16:
encoded_ird_size = 2;
break;
case I40IW_HW_IRD_SETTING_8:
case I40IW_HW_IRD_SETTING_4:
encoded_ird_size = 1;
break;
case I40IW_HW_IRD_SETTING_2:
default:
encoded_ird_size = 0;
break;
}
return encoded_ird_size;
}
/**
* i40iw_record_ird_ord - Record IRD/ORD passed in
* @cm_node: connection's node
* @conn_ird: connection IRD
* @conn_ord: connection ORD
*/
static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
{
if (conn_ird > I40IW_MAX_IRD_SIZE)
conn_ird = I40IW_MAX_IRD_SIZE;
if (conn_ord > I40IW_MAX_ORD_SIZE)
conn_ord = I40IW_MAX_ORD_SIZE;
cm_node->ird_size = conn_ird;
cm_node->ord_size = conn_ord;
}
/**
* i40iw_copy_ip_ntohl - change network to host ip
* @dst: host ip
* @src: big endian
*/
void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
{
*dst++ = ntohl(*src++);
*dst++ = ntohl(*src++);
*dst++ = ntohl(*src++);
*dst = ntohl(*src);
}
/**
* i40iw_copy_ip_htonl - change host addr to network ip
* @dst: host ip
* @src: little endian
*/
static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
{
*dst++ = htonl(*src++);
*dst++ = htonl(*src++);
*dst++ = htonl(*src++);
*dst = htonl(*src);
}
/**
* i40iw_fill_sockaddr4 - get addr info for passive connection
* @cm_node: connection's node
* @event: upper layer's cm event
*/
static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
struct iw_cm_event *event)
{
struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
laddr->sin_family = AF_INET;
raddr->sin_family = AF_INET;
laddr->sin_port = htons(cm_node->loc_port);
raddr->sin_port = htons(cm_node->rem_port);
laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
}
/**
* i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
* @cm_node: connection's node
* @event: upper layer's cm event
*/
static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
struct iw_cm_event *event)
{
struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
laddr6->sin6_family = AF_INET6;
raddr6->sin6_family = AF_INET6;
laddr6->sin6_port = htons(cm_node->loc_port);
raddr6->sin6_port = htons(cm_node->rem_port);
i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
cm_node->loc_addr);
i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
cm_node->rem_addr);
}
/**
* i40iw_get_addr_info
* @cm_node: contains ip/tcp info
* @cm_info: to get a copy of the cm_node ip/tcp info
*/
static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
struct i40iw_cm_info *cm_info)
{
cm_info->ipv4 = cm_node->ipv4;
cm_info->vlan_id = cm_node->vlan_id;
memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
cm_info->loc_port = cm_node->loc_port;
cm_info->rem_port = cm_node->rem_port;
}
/**
* i40iw_get_cmevent_info - for cm event upcall
* @cm_node: connection's node
* @cm_id: upper layers cm struct for the event
* @event: upper layer's cm event
*/
static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
struct iw_cm_id *cm_id,
struct iw_cm_event *event)
{
memcpy(&event->local_addr, &cm_id->m_local_addr,
sizeof(event->local_addr));
memcpy(&event->remote_addr, &cm_id->m_remote_addr,
sizeof(event->remote_addr));
if (cm_node) {
event->private_data = (void *)cm_node->pdata_buf;
event->private_data_len = (u8)cm_node->pdata.size;
event->ird = cm_node->ird_size;
event->ord = cm_node->ord_size;
}
}
/**
* i40iw_send_cm_event - upcall cm's event handler
* @cm_node: connection's node
* @cm_id: upper layer's cm info struct
* @type: Event type to indicate
* @status: status for the event type
*/
static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
struct iw_cm_id *cm_id,
enum iw_cm_event_type type,
int status)
{
struct iw_cm_event event;
memset(&event, 0, sizeof(event));
event.event = type;
event.status = status;
switch (type) {
case IW_CM_EVENT_CONNECT_REQUEST:
if (cm_node->ipv4)
i40iw_fill_sockaddr4(cm_node, &event);
else
i40iw_fill_sockaddr6(cm_node, &event);
event.provider_data = (void *)cm_node;
event.private_data = (void *)cm_node->pdata_buf;
event.private_data_len = (u8)cm_node->pdata.size;
break;
case IW_CM_EVENT_CONNECT_REPLY:
i40iw_get_cmevent_info(cm_node, cm_id, &event);
break;
case IW_CM_EVENT_ESTABLISHED:
event.ird = cm_node->ird_size;
event.ord = cm_node->ord_size;
break;
case IW_CM_EVENT_DISCONNECT:
break;
case IW_CM_EVENT_CLOSE:
break;
default:
i40iw_pr_err("event type received type = %d\n", type);
return -1;
}
return cm_id->event_handler(cm_id, &event);
}
/**
* i40iw_create_event - create cm event
* @cm_node: connection's node
* @type: Event type to generate
*/
static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
enum i40iw_cm_event_type type)
{
struct i40iw_cm_event *event;
if (!cm_node->cm_id)
return NULL;
event = kzalloc(sizeof(*event), GFP_ATOMIC);
if (!event)
return NULL;
event->type = type;
event->cm_node = cm_node;
memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
event->cm_info.rem_port = cm_node->rem_port;
event->cm_info.loc_port = cm_node->loc_port;
event->cm_info.cm_id = cm_node->cm_id;
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
cm_node,
event,
type,
event->cm_info.loc_addr,
event->cm_info.rem_addr);
i40iw_cm_post_event(event);
return event;
}
/**
* i40iw_free_retrans_entry - free send entry
* @cm_node: connection's node
*/
static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
{
struct i40iw_sc_dev *dev = cm_node->dev;
struct i40iw_timer_entry *send_entry;
send_entry = cm_node->send_entry;
if (send_entry) {
cm_node->send_entry = NULL;
i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
kfree(send_entry);
atomic_dec(&cm_node->ref_count);
}
}
/**
* i40iw_cleanup_retrans_entry - free send entry with lock
* @cm_node: connection's node
*/
static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
{
unsigned long flags;
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
i40iw_free_retrans_entry(cm_node);
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
}
static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
{
if ((cm_node->rem_mac[0] == 0x0) &&
(((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
return true;
return false;
}
/**
* i40iw_form_cm_frame - get a free packet and build frame
* @cm_node: connection's node ionfo to use in frame
* @options: pointer to options info
* @hdr: pointer mpa header
* @pdata: pointer to private data
* @flags: indicates FIN or ACK
*/
static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
struct i40iw_kmem_info *options,
struct i40iw_kmem_info *hdr,
struct i40iw_kmem_info *pdata,
u8 flags)
{
struct i40iw_puda_buf *sqbuf;
struct i40iw_sc_dev *dev = cm_node->dev;
u8 *buf;
struct tcphdr *tcph;
struct iphdr *iph;
struct ipv6hdr *ip6h;
struct ethhdr *ethh;
u16 packetsize;
u16 eth_hlen = ETH_HLEN;
u32 opts_len = 0;
u32 pd_len = 0;
u32 hdr_len = 0;
sqbuf = i40iw_puda_get_bufpool(dev->ilq);
if (!sqbuf)
return NULL;
buf = sqbuf->mem.va;
if (options)
opts_len = (u32)options->size;
if (hdr)
hdr_len = hdr->size;
if (pdata) {
pd_len = pdata->size;
if (!is_remote_ne020_or_chelsio(cm_node))
pd_len += MPA_ZERO_PAD_LEN;
}
if (cm_node->vlan_id < VLAN_TAG_PRESENT)
eth_hlen += 4;
if (cm_node->ipv4)
packetsize = sizeof(*iph) + sizeof(*tcph);
else
packetsize = sizeof(*ip6h) + sizeof(*tcph);
packetsize += opts_len + hdr_len + pd_len;
memset(buf, 0x00, eth_hlen + packetsize);
sqbuf->totallen = packetsize + eth_hlen;
sqbuf->maclen = eth_hlen;
sqbuf->tcphlen = sizeof(*tcph) + opts_len;
sqbuf->scratch = (void *)cm_node;
ethh = (struct ethhdr *)buf;
buf += eth_hlen;
if (cm_node->ipv4) {
sqbuf->ipv4 = true;
iph = (struct iphdr *)buf;
buf += sizeof(*iph);
tcph = (struct tcphdr *)buf;
buf += sizeof(*tcph);
ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
ether_addr_copy(ethh->h_source, cm_node->loc_mac);
if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
} else {
ethh->h_proto = htons(ETH_P_IP);
}
iph->version = IPVERSION;
iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
iph->tos = 0;
iph->tot_len = htons(packetsize);
iph->id = htons(++cm_node->tcp_cntxt.loc_id);
iph->frag_off = htons(0x4000);
iph->ttl = 0x40;
iph->protocol = IPPROTO_TCP;
iph->saddr = htonl(cm_node->loc_addr[0]);
iph->daddr = htonl(cm_node->rem_addr[0]);
} else {
sqbuf->ipv4 = false;
ip6h = (struct ipv6hdr *)buf;
buf += sizeof(*ip6h);
tcph = (struct tcphdr *)buf;
buf += sizeof(*tcph);
ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
ether_addr_copy(ethh->h_source, cm_node->loc_mac);
if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
} else {
ethh->h_proto = htons(ETH_P_IPV6);
}
ip6h->version = 6;
ip6h->flow_lbl[0] = 0;
ip6h->flow_lbl[1] = 0;
ip6h->flow_lbl[2] = 0;
ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
ip6h->nexthdr = 6;
ip6h->hop_limit = 128;
i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
cm_node->loc_addr);
i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
cm_node->rem_addr);
}
tcph->source = htons(cm_node->loc_port);
tcph->dest = htons(cm_node->rem_port);
tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
if (flags & SET_ACK) {
cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
tcph->ack = 1;
} else {
tcph->ack_seq = 0;
}
if (flags & SET_SYN) {
cm_node->tcp_cntxt.loc_seq_num++;
tcph->syn = 1;
} else {
cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
}
if (flags & SET_FIN) {
cm_node->tcp_cntxt.loc_seq_num++;
tcph->fin = 1;
}
if (flags & SET_RST)
tcph->rst = 1;
tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
sqbuf->tcphlen = tcph->doff << 2;
tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
tcph->urg_ptr = 0;
if (opts_len) {
memcpy(buf, options->addr, opts_len);
buf += opts_len;
}
if (hdr_len) {
memcpy(buf, hdr->addr, hdr_len);
buf += hdr_len;
}
if (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
*/
static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
{
struct i40iw_puda_buf *sqbuf;
int flags = SET_RST | SET_ACK;
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
if (!sqbuf) {
i40iw_pr_err("no sqbuf\n");
return -1;
}
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
}
/**
* i40iw_active_open_err - send event for active side cm error
* @cm_node: connection's node
* @reset: Flag to send reset or not
*/
static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
{
i40iw_cleanup_retrans_entry(cm_node);
cm_node->cm_core->stats_connect_errs++;
if (reset) {
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"%s cm_node=%p state=%d\n",
__func__,
cm_node,
cm_node->state);
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
}
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
}
/**
* i40iw_passive_open_err - handle passive side cm error
* @cm_node: connection's node
* @reset: send reset or just free cm_node
*/
static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
{
i40iw_cleanup_retrans_entry(cm_node);
cm_node->cm_core->stats_passive_errs++;
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"%s cm_node=%p state =%d\n",
__func__,
cm_node,
cm_node->state);
if (reset)
i40iw_send_reset(cm_node);
else
i40iw_rem_ref_cm_node(cm_node);
}
/**
* i40iw_event_connect_error - to create connect error event
* @event: cm information for connect event
*/
static void i40iw_event_connect_error(struct i40iw_cm_event *event)
{
struct i40iw_qp *iwqp;
struct iw_cm_id *cm_id;
cm_id = event->cm_node->cm_id;
if (!cm_id)
return;
iwqp = cm_id->provider_data;
if (!iwqp || !iwqp->iwdev)
return;
iwqp->cm_id = NULL;
cm_id->provider_data = NULL;
i40iw_send_cm_event(event->cm_node, cm_id,
IW_CM_EVENT_CONNECT_REPLY,
-ECONNRESET);
cm_id->rem_ref(cm_id);
i40iw_rem_ref_cm_node(event->cm_node);
}
/**
* i40iw_process_options
* @cm_node: connection's node
* @optionsloc: point to start of options
* @optionsize: size of all options
* @syn_packet: flag if syn packet
*/
static int i40iw_process_options(struct i40iw_cm_node *cm_node,
u8 *optionsloc,
u32 optionsize,
u32 syn_packet)
{
u32 tmp;
u32 offset = 0;
union all_known_options *all_options;
char got_mss_option = 0;
while (offset < optionsize) {
all_options = (union all_known_options *)(optionsloc + offset);
switch (all_options->as_base.optionnum) {
case OPTION_NUMBER_END:
offset = optionsize;
break;
case OPTION_NUMBER_NONE:
offset += 1;
continue;
case OPTION_NUMBER_MSS:
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"%s: MSS Length: %d Offset: %d Size: %d\n",
__func__,
all_options->as_mss.length,
offset,
optionsize);
got_mss_option = 1;
if (all_options->as_mss.length != 4)
return -1;
tmp = ntohs(all_options->as_mss.mss);
if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
cm_node->tcp_cntxt.mss = tmp;
break;
case OPTION_NUMBER_WINDOW_SCALE:
cm_node->tcp_cntxt.snd_wscale =
all_options->as_windowscale.shiftcount;
break;
default:
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"TCP Option not understood: %x\n",
all_options->as_base.optionnum);
break;
}
offset += all_options->as_base.length;
}
if (!got_mss_option && syn_packet)
cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
return 0;
}
/**
* i40iw_handle_tcp_options -
* @cm_node: connection's node
* @tcph: pointer tcp header
* @optionsize: size of options rcvd
* @passive: active or passive flag
*/
static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
struct tcphdr *tcph,
int optionsize,
int passive)
{
u8 *optionsloc = (u8 *)&tcph[1];
if (optionsize) {
if (i40iw_process_options(cm_node,
optionsloc,
optionsize,
(u32)tcph->syn)) {
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"%s: Node %p, Sending RESET\n",
__func__,
cm_node);
if (passive)
i40iw_passive_open_err(cm_node, true);
else
i40iw_active_open_err(cm_node, true);
return -1;
}
}
cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
cm_node->tcp_cntxt.snd_wscale;
if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
return 0;
}
/**
* i40iw_build_mpa_v1 - build a MPA V1 frame
* @cm_node: connection's node
* @mpa_key: to do read0 or write0
*/
static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
void *start_addr,
u8 mpa_key)
{
struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
switch (mpa_key) {
case MPA_KEY_REQUEST:
memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
break;
case MPA_KEY_REPLY:
memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
break;
default:
break;
}
mpa_frame->flags = IETF_MPA_FLAGS_CRC;
mpa_frame->rev = cm_node->mpa_frame_rev;
mpa_frame->priv_data_len = htons(cm_node->pdata.size);
}
/**
* i40iw_build_mpa_v2 - build a MPA V2 frame
* @cm_node: connection's node
* @start_addr: buffer start address
* @mpa_key: to do read0 or write0
*/
static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
void *start_addr,
u8 mpa_key)
{
struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
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;
ctrl_ird |= IETF_FLPDU_ZERO_LEN;
switch (mpa_key) {
case MPA_KEY_REQUEST:
ctrl_ord |= IETF_RDMA0_WRITE;
ctrl_ord |= IETF_RDMA0_READ;
break;
case MPA_KEY_REPLY:
switch (cm_node->send_rdma0_op) {
case SEND_RDMA_WRITE_ZERO:
ctrl_ord |= IETF_RDMA0_WRITE;
break;
case SEND_RDMA_READ_ZERO:
ctrl_ord |= IETF_RDMA0_READ;
break;
}
break;
default:
break;
}
rtr_msg->ctrl_ird = htons(ctrl_ird);
rtr_msg->ctrl_ord = htons(ctrl_ord);
}
/**
* i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
* @cm_node: connection's node
* @mpa: mpa: data buffer
* @mpa_key: to do read0 or write0
*/
static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
struct i40iw_kmem_info *mpa,
u8 mpa_key)
{
int hdr_len = 0;
switch (cm_node->mpa_frame_rev) {
case IETF_MPA_V1:
hdr_len = sizeof(struct ietf_mpa_v1);
i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
break;
case IETF_MPA_V2:
hdr_len = sizeof(struct ietf_mpa_v2);
i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
break;
default:
break;
}
return hdr_len;
}
/**
* i40iw_send_mpa_request - active node send mpa request to passive node
* @cm_node: connection's node
*/
static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
{
struct i40iw_puda_buf *sqbuf;
if (!cm_node) {
i40iw_pr_err("cm_node == NULL\n");
return -1;
}
cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
&cm_node->mpa_hdr,
MPA_KEY_REQUEST);
if (!cm_node->mpa_hdr.size) {
i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
return -1;
}
sqbuf = i40iw_form_cm_frame(cm_node,
NULL,
&cm_node->mpa_hdr,
&cm_node->pdata,
SET_ACK);
if (!sqbuf) {
i40iw_pr_err("sq_buf == NULL\n");
return -1;
}
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
}
/**
* i40iw_send_mpa_reject -
* @cm_node: connection's node
* @pdata: reject data for connection
* @plen: length of reject data
*/
static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
const void *pdata,
u8 plen)
{
struct i40iw_puda_buf *sqbuf;
struct i40iw_kmem_info priv_info;
cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
&cm_node->mpa_hdr,
MPA_KEY_REPLY);
cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
priv_info.addr = (void *)pdata;
priv_info.size = plen;
sqbuf = i40iw_form_cm_frame(cm_node,
NULL,
&cm_node->mpa_hdr,
&priv_info,
SET_ACK | SET_FIN);
if (!sqbuf) {
i40iw_pr_err("no sqbuf\n");
return -ENOMEM;
}
cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
}
/**
* recv_mpa - process an IETF MPA frame
* @cm_node: connection's node
* @buffer: Data pointer
* @type: to return accept or reject
* @len: Len of mpa buffer
*/
static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
{
struct ietf_mpa_v1 *mpa_frame;
struct ietf_mpa_v2 *mpa_v2_frame;
struct ietf_rtr_msg *rtr_msg;
int mpa_hdr_len;
int priv_data_len;
*type = I40IW_MPA_REQUEST_ACCEPT;
if (len < sizeof(struct ietf_mpa_v1)) {
i40iw_pr_err("ietf buffer small (%x)\n", len);
return -1;
}
mpa_frame = (struct ietf_mpa_v1 *)buffer;
mpa_hdr_len = sizeof(struct ietf_mpa_v1);
priv_data_len = ntohs(mpa_frame->priv_data_len);
if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
i40iw_pr_err("large pri_data %d\n", priv_data_len);
return -1;
}
if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
return -1;
}
if (mpa_frame->rev > cm_node->mpa_frame_rev) {
i40iw_pr_err("rev %d\n", mpa_frame->rev);
return -1;
}
cm_node->mpa_frame_rev = mpa_frame->rev;
if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
i40iw_pr_err("Unexpected MPA Key received\n");
return -1;
}
} else {
if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
i40iw_pr_err("Unexpected MPA Key received\n");
return -1;
}
}
if (priv_data_len + mpa_hdr_len > len) {
i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
priv_data_len, mpa_hdr_len, len);
return -1;
}
if (len > MAX_CM_BUFFER) {
i40iw_pr_err("ietf buffer large len = %d\n", len);
return -1;
}
switch (mpa_frame->rev) {
case IETF_MPA_V2:{
u16 ird_size;
u16 ord_size;
u16 ctrl_ord;
u16 ctrl_ird;
mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
mpa_hdr_len += IETF_RTR_MSG_SIZE;
rtr_msg = &mpa_v2_frame->rtr_msg;
/* parse rtr message */
ctrl_ord = ntohs(rtr_msg->ctrl_ord);
ctrl_ird = ntohs(rtr_msg->ctrl_ird);
ird_size = ctrl_ird & IETF_NO_IRD_ORD;
ord_size = ctrl_ord & IETF_NO_IRD_ORD;
if (!(ctrl_ird & IETF_PEER_TO_PEER))
return -1;
if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
goto negotiate_done;
}
if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
/* responder */
if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
cm_node->ird_size = 1;
if (cm_node->ord_size > ird_size)
cm_node->ord_size = ird_size;
} else {
/* initiator */
if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
return -1;
if (cm_node->ord_size > ird_size)
cm_node->ord_size = ird_size;
if (cm_node->ird_size < ord_size)
/* no resources available */
return -1;
}
negotiate_done:
if (ctrl_ord & IETF_RDMA0_READ)
cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
else if (ctrl_ord & IETF_RDMA0_WRITE)
cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
else /* Not supported RDMA0 operation */
return -1;
i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
"MPAV2: Negotiated ORD: %d, IRD: %d\n",
cm_node->ord_size, cm_node->ird_size);
break;
}
break;
case IETF_MPA_V1:
default:
break;
}
memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
cm_node->pdata.size = priv_data_len;
if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
*type = I40IW_MPA_REQUEST_REJECT;
if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
cm_node->snd_mark_en = true;
return 0;
}
/**
* i40iw_schedule_cm_timer
* @@cm_node: connection's node
* @sqbuf: buffer to send
* @type: if it es send ot close
* @send_retrans: if rexmits to be done
* @close_when_complete: is cm_node to be removed
*
* note - cm_node needs to be protected before calling this. Encase in:
* i40iw_rem_ref_cm_node(cm_core, cm_node);
* i40iw_schedule_cm_timer(...)
* atomic_inc(&cm_node->ref_count);
*/
int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *sqbuf,
enum i40iw_timer_type type,
int send_retrans,
int close_when_complete)
{
struct i40iw_sc_dev *dev = cm_node->dev;
struct i40iw_cm_core *cm_core = cm_node->cm_core;
struct i40iw_timer_entry *new_send;
int ret = 0;
u32 was_timer_set;
unsigned long flags;
new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
if (!new_send) {
i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
return -ENOMEM;
}
new_send->retrycount = I40IW_DEFAULT_RETRYS;
new_send->retranscount = I40IW_DEFAULT_RETRANS;
new_send->sqbuf = sqbuf;
new_send->timetosend = jiffies;
new_send->type = type;
new_send->send_retrans = send_retrans;
new_send->close_when_complete = close_when_complete;
if (type == I40IW_TIMER_TYPE_CLOSE) {
new_send->timetosend += (HZ / 10);
if (cm_node->close_entry) {
kfree(new_send);
i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
i40iw_pr_err("already close entry\n");
return -EINVAL;
}
cm_node->close_entry = new_send;
}
if (type == I40IW_TIMER_TYPE_SEND) {
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
cm_node->send_entry = new_send;
atomic_inc(&cm_node->ref_count);
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
atomic_inc(&sqbuf->refcount);
i40iw_puda_send_buf(dev->ilq, sqbuf);
if (!send_retrans) {
i40iw_cleanup_retrans_entry(cm_node);
if (close_when_complete)
i40iw_rem_ref_cm_node(cm_node);
return ret;
}
}
spin_lock_irqsave(&cm_core->ht_lock, flags);
was_timer_set = timer_pending(&cm_core->tcp_timer);
if (!was_timer_set) {
cm_core->tcp_timer.expires = new_send->timetosend;
add_timer(&cm_core->tcp_timer);
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
return ret;
}
/**
* i40iw_retrans_expired - Could not rexmit the packet
* @cm_node: connection's node
*/
static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
{
struct iw_cm_id *cm_id = cm_node->cm_id;
enum i40iw_cm_node_state state = cm_node->state;
cm_node->state = I40IW_CM_STATE_CLOSED;
switch (state) {
case I40IW_CM_STATE_SYN_RCVD:
case I40IW_CM_STATE_CLOSING:
i40iw_rem_ref_cm_node(cm_node);
break;
case I40IW_CM_STATE_FIN_WAIT1:
case I40IW_CM_STATE_LAST_ACK:
if (cm_node->cm_id)
cm_id->rem_ref(cm_id);
i40iw_send_reset(cm_node);
break;
default:
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
break;
}
}
/**
* i40iw_handle_close_entry - for handling retry/timeouts
* @cm_node: connection's node
* @rem_node: flag for remove cm_node
*/
static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
{
struct i40iw_timer_entry *close_entry = cm_node->close_entry;
struct iw_cm_id *cm_id = cm_node->cm_id;
struct i40iw_qp *iwqp;
unsigned long flags;
if (!close_entry)
return;
iwqp = (struct i40iw_qp *)close_entry->sqbuf;
if (iwqp) {
spin_lock_irqsave(&iwqp->lock, flags);
if (iwqp->cm_id) {
iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
iwqp->last_aeq = I40IW_AE_RESET_SENT;
iwqp->ibqp_state = IB_QPS_ERR;
spin_unlock_irqrestore(&iwqp->lock, flags);
i40iw_cm_disconn(iwqp);
} else {
spin_unlock_irqrestore(&iwqp->lock, flags);
}
} else if (rem_node) {
/* TIME_WAIT state */
i40iw_rem_ref_cm_node(cm_node);
}
if (cm_id)
cm_id->rem_ref(cm_id);
kfree(close_entry);
cm_node->close_entry = NULL;
}
/**
* i40iw_cm_timer_tick - system's timer expired callback
* @pass: Pointing to cm_core
*/
static void i40iw_cm_timer_tick(unsigned long pass)
{
unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
struct i40iw_cm_node *cm_node;
struct i40iw_timer_entry *send_entry, *close_entry;
struct list_head *list_core_temp;
struct list_head *list_node;
struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
u32 settimer = 0;
unsigned long timetosend;
struct i40iw_sc_dev *dev;
unsigned long flags;
struct list_head timer_list;
INIT_LIST_HEAD(&timer_list);
spin_lock_irqsave(&cm_core->ht_lock, flags);
list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
cm_node = container_of(list_node, struct i40iw_cm_node, list);
if (cm_node->close_entry || cm_node->send_entry) {
atomic_inc(&cm_node->ref_count);
list_add(&cm_node->timer_entry, &timer_list);
}
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
list_for_each_safe(list_node, list_core_temp, &timer_list) {
cm_node = container_of(list_node,
struct i40iw_cm_node,
timer_entry);
close_entry = cm_node->close_entry;
if (close_entry) {
if (time_after(close_entry->timetosend, jiffies)) {
if (nexttimeout > close_entry->timetosend ||
!settimer) {
nexttimeout = close_entry->timetosend;
settimer = 1;
}
} else {
i40iw_handle_close_entry(cm_node, 1);
}
}
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
send_entry = cm_node->send_entry;
if (!send_entry)
goto done;
if (time_after(send_entry->timetosend, jiffies)) {
if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
if ((nexttimeout > send_entry->timetosend) ||
!settimer) {
nexttimeout = send_entry->timetosend;
settimer = 1;
}
} else {
i40iw_free_retrans_entry(cm_node);
}
goto done;
}
if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
(cm_node->state == I40IW_CM_STATE_CLOSED)) {
i40iw_free_retrans_entry(cm_node);
goto done;
}
if (!send_entry->retranscount || !send_entry->retrycount) {
i40iw_free_retrans_entry(cm_node);
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
i40iw_retrans_expired(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
goto done;
}
cm_node->cm_core->stats_pkt_retrans++;
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
dev = cm_node->dev;
atomic_inc(&send_entry->sqbuf->refcount);
i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
if (send_entry->send_retrans) {
send_entry->retranscount--;
timetosend = (I40IW_RETRY_TIMEOUT <<
(I40IW_DEFAULT_RETRANS -
send_entry->retranscount));
send_entry->timetosend = jiffies +
min(timetosend, I40IW_MAX_TIMEOUT);
if (nexttimeout > send_entry->timetosend || !settimer) {
nexttimeout = send_entry->timetosend;
settimer = 1;
}
} else {
int close_when_complete;
close_when_complete = send_entry->close_when_complete;
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"cm_node=%p state=%d\n",
cm_node,
cm_node->state);
i40iw_free_retrans_entry(cm_node);
if (close_when_complete)
i40iw_rem_ref_cm_node(cm_node);
}
done:
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
i40iw_rem_ref_cm_node(cm_node);
}
if (settimer) {
spin_lock_irqsave(&cm_core->ht_lock, flags);
if (!timer_pending(&cm_core->tcp_timer)) {
cm_core->tcp_timer.expires = nexttimeout;
add_timer(&cm_core->tcp_timer);
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
}
}
/**
* i40iw_send_syn - send SYN packet
* @cm_node: connection's node
* @sendack: flag to set ACK bit or not
*/
int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
{
struct i40iw_puda_buf *sqbuf;
int flags = SET_SYN;
char optionsbuffer[sizeof(struct option_mss) +
sizeof(struct option_windowscale) +
sizeof(struct option_base) + TCP_OPTIONS_PADDING];
struct i40iw_kmem_info opts;
int optionssize = 0;
/* Sending MSS option */
union all_known_options *options;
opts.addr = optionsbuffer;
if (!cm_node) {
i40iw_pr_err("no cm_node\n");
return -EINVAL;
}
options = (union all_known_options *)&optionsbuffer[optionssize];
options->as_mss.optionnum = OPTION_NUMBER_MSS;
options->as_mss.length = sizeof(struct option_mss);
options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
optionssize += sizeof(struct option_mss);
options = (union all_known_options *)&optionsbuffer[optionssize];
options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
options->as_windowscale.length = sizeof(struct option_windowscale);
options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
optionssize += sizeof(struct option_windowscale);
options = (union all_known_options *)&optionsbuffer[optionssize];
options->as_end = OPTION_NUMBER_END;
optionssize += 1;
if (sendack)
flags |= SET_ACK;
opts.size = optionssize;
sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
if (!sqbuf) {
i40iw_pr_err("no sqbuf\n");
return -1;
}
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
}
/**
* i40iw_send_ack - Send ACK packet
* @cm_node: connection's node
*/
static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
{
struct i40iw_puda_buf *sqbuf;
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
if (sqbuf)
i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
else
i40iw_pr_err("no sqbuf\n");
}
/**
* i40iw_send_fin - Send FIN pkt
* @cm_node: connection's node
*/
static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
{
struct i40iw_puda_buf *sqbuf;
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
if (!sqbuf) {
i40iw_pr_err("no sqbuf\n");
return -1;
}
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
}
/**
* i40iw_find_node - find a cm node that matches the reference cm node
* @cm_core: cm's core
* @rem_port: remote tcp port num
* @rem_addr: remote ip addr
* @loc_port: local tcp port num
* @loc_addr: loc ip addr
* @add_refcnt: flag to increment refcount of cm_node
*/
struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
u16 rem_port,
u32 *rem_addr,
u16 loc_port,
u32 *loc_addr,
bool add_refcnt)
{
struct list_head *hte;
struct i40iw_cm_node *cm_node;
unsigned long flags;
hte = &cm_core->connected_nodes;
/* walk list and find cm_node associated with this session ID */
spin_lock_irqsave(&cm_core->ht_lock, flags);
list_for_each_entry(cm_node, hte, list) {
if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
(cm_node->loc_port == loc_port) &&
!memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
(cm_node->rem_port == rem_port)) {
if (add_refcnt)
atomic_inc(&cm_node->ref_count);
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
return cm_node;
}
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
/* no owner node */
return NULL;
}
/**
* i40iw_find_listener - find a cm node listening on this addr-port pair
* @cm_core: cm's core
* @dst_port: listener tcp port num
* @dst_addr: listener ip addr
* @listener_state: state to match with listen node's
*/
static struct i40iw_cm_listener *i40iw_find_listener(
struct i40iw_cm_core *cm_core,
u32 *dst_addr,
u16 dst_port,
u16 vlan_id,
enum i40iw_cm_listener_state
listener_state)
{
struct i40iw_cm_listener *listen_node;
static const u32 ip_zero[4] = { 0, 0, 0, 0 };
u32 listen_addr[4];
u16 listen_port;
unsigned long flags;
/* walk list and find cm_node associated with this session ID */
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
listen_port = listen_node->loc_port;
/* compare node pair, return node handle if a match */
if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
!memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
(listen_port == dst_port) &&
(listener_state & listen_node->listener_state)) {
atomic_inc(&listen_node->ref_count);
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
return listen_node;
}
}
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
return NULL;
}
/**
* i40iw_add_hte_node - add a cm node to the hash table
* @cm_core: cm's core
* @cm_node: connection's node
*/
static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
struct i40iw_cm_node *cm_node)
{
struct list_head *hte;
unsigned long flags;
if (!cm_node || !cm_core) {
i40iw_pr_err("cm_node or cm_core == NULL\n");
return;
}
spin_lock_irqsave(&cm_core->ht_lock, flags);
/* get a handle on the hash table element (list head for this slot) */
hte = &cm_core->connected_nodes;
list_add_tail(&cm_node->list, hte);
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
}
/**
* listen_port_in_use - determine if port is in use
* @port: Listen port number
*/
static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
{
struct i40iw_cm_listener *listen_node;
unsigned long flags;
bool ret = false;
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
if (listen_node->loc_port == port) {
ret = true;
break;
}
}
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
return ret;
}
/**
* i40iw_del_multiple_qhash - Remove qhash and child listens
* @iwdev: iWarp device
* @cm_info: CM info for parent listen node
* @cm_parent_listen_node: The parent listen node
*/
static enum i40iw_status_code i40iw_del_multiple_qhash(
struct i40iw_device *iwdev,
struct i40iw_cm_info *cm_info,
struct i40iw_cm_listener *cm_parent_listen_node)
{
struct i40iw_cm_listener *child_listen_node;
enum i40iw_status_code ret = I40IW_ERR_CONFIG;
struct list_head *pos, *tpos;
unsigned long flags;
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
if (child_listen_node->ipv4)
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"removing child listen for IP=%pI4, port=%d, vlan=%d\n",
child_listen_node->loc_addr,
child_listen_node->loc_port,
child_listen_node->vlan_id);
else
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
"removing child listen for IP=%pI6, port=%d, vlan=%d\n",
child_listen_node->loc_addr,
child_listen_node->loc_port,
child_listen_node->vlan_id);
list_del(pos);
memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
sizeof(cm_info->loc_addr));
cm_info->vlan_id = child_listen_node->vlan_id;
ret = i40iw_manage_qhash(iwdev, cm_info,
I40IW_QHASH_TYPE_TCP_SYN,
I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
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 mac
* @addr: local IPv6 address
* @vlan_id: vlan id for the given IPv6 address
* @mac: mac address for the given IPv6 address
*
* Returns the net_device of the IPv6 address and also sets the
* vlan id and mac for that address.
*/
static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
{
struct net_device *ip_dev = NULL;
#if IS_ENABLED(CONFIG_IPV6)
struct in6_addr laddr6;
i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
if (vlan_id)
*vlan_id = I40IW_NO_VLAN;
if (mac)
eth_zero_addr(mac);
rcu_read_lock();
for_each_netdev_rcu(&init_net, ip_dev) {
if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
if (vlan_id)
*vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
if (ip_dev->dev_addr && mac)
ether_addr_copy(mac, ip_dev->dev_addr);
break;
}
}
rcu_read_unlock();
#endif
return ip_dev;
}
/**
* i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
* @addr: local IPv4 address
*/
static u16 i40iw_get_vlan_ipv4(u32 *addr)
{
struct net_device *netdev;
u16 vlan_id = I40IW_NO_VLAN;
netdev = ip_dev_find(&init_net, htonl(addr[0]));
if (netdev) {
vlan_id = rdma_vlan_dev_vlan_id(netdev);
dev_put(netdev);
}
return vlan_id;
}
/**
* i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
* @iwdev: iWarp device
* @cm_info: CM info for parent listen node
* @cm_parent_listen_node: The parent listen node
*
* Adds a qhash and a child listen node for every IPv6 address
* on the adapter and adds the associated qhash filter
*/
static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
struct i40iw_cm_info *cm_info,
struct i40iw_cm_listener *cm_parent_listen_node)
{
struct net_device *ip_dev;
struct inet6_dev *idev;
struct inet6_ifaddr *ifp;
enum i40iw_status_code ret = 0;
struct i40iw_cm_listener *child_listen_node;
unsigned long flags;
rtnl_lock();
for_each_netdev(&init_net, ip_dev) {
if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
(rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
(ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
idev = __in6_dev_get(ip_dev);
if (!idev) {
i40iw_pr_err("idev == NULL\n");
break;
}
list_for_each_entry(ifp, &idev->addr_list, if_list) {
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"IP=%pI6, vlan_id=%d, MAC=%pM\n",
&ifp->addr,
rdma_vlan_dev_vlan_id(ip_dev),
ip_dev->dev_addr);
child_listen_node =
kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"Allocating child listener %p\n",
child_listen_node);
if (!child_listen_node) {
i40iw_pr_err("listener memory allocation\n");
ret = I40IW_ERR_NO_MEMORY;
goto exit;
}
cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
cm_parent_listen_node->vlan_id = cm_info->vlan_id;
memcpy(child_listen_node, cm_parent_listen_node,
sizeof(*child_listen_node));
i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
ifp->addr.in6_u.u6_addr32);
memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
sizeof(cm_info->loc_addr));
ret = i40iw_manage_qhash(iwdev, cm_info,
I40IW_QHASH_TYPE_TCP_SYN,
I40IW_QHASH_MANAGE_TYPE_ADD,
NULL, true);
if (!ret) {
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
list_add(&child_listen_node->child_listen_list,
&cm_parent_listen_node->child_listen_list);
spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
} else {
kfree(child_listen_node);
}
}
}
}
exit:
rtnl_unlock();
return ret;
}
/**
* i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
* @iwdev: iWarp device
* @cm_info: CM info for parent listen node
* @cm_parent_listen_node: The parent listen node
*
* Adds a qhash and a child listen node for every IPv4 address
* on the adapter and adds the associated qhash filter
*/
static enum i40iw_status_code i40iw_add_mqh_4(
struct i40iw_device *iwdev,
struct i40iw_cm_info *cm_info,
struct i40iw_cm_listener *cm_parent_listen_node)
{
struct net_device *dev;
struct in_device *idev;
struct i40iw_cm_listener *child_listen_node;
enum i40iw_status_code ret = 0;
unsigned long flags;
rtnl_lock();
for_each_netdev(&init_net, dev) {
if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
(rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
(dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
idev = in_dev_get(dev);
for_ifa(idev) {
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
&ifa->ifa_address,
rdma_vlan_dev_vlan_id(dev),
dev->dev_addr);
child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"Allocating child listener %p\n",
child_listen_node);
if (!child_listen_node) {
i40iw_pr_err("listener memory allocation\n");
in_dev_put(idev);
ret = I40IW_ERR_NO_MEMORY;
goto exit;
}
cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
cm_parent_listen_node->vlan_id = cm_info->vlan_id;
memcpy(child_listen_node,
cm_parent_listen_node,
sizeof(*child_listen_node));
child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
sizeof(cm_info->loc_addr));
ret = i40iw_manage_qhash(iwdev,
cm_info,
I40IW_QHASH_TYPE_TCP_SYN,
I40IW_QHASH_MANAGE_TYPE_ADD,
NULL,
true);
if (!ret) {
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
list_add(&child_listen_node->child_listen_list,
&cm_parent_listen_node->child_listen_list);
spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
} else {
kfree(child_listen_node);
cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
}
}
endfor_ifa(idev);
in_dev_put(idev);
}
}
exit:
rtnl_unlock();
return ret;
}
/**
* i40iw_dec_refcnt_listen - delete listener and associated cm nodes
* @cm_core: cm's core
* @free_hanging_nodes: to free associated cm_nodes
* @apbvt_del: flag to delete the apbvt
*/
static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
struct i40iw_cm_listener *listener,
int free_hanging_nodes, bool apbvt_del)
{
int ret = -EINVAL;
int err = 0;
struct list_head *list_pos;
struct list_head *list_temp;
struct i40iw_cm_node *cm_node;
struct list_head reset_list;
struct i40iw_cm_info nfo;
struct i40iw_cm_node *loopback;
enum i40iw_cm_node_state old_state;
unsigned long flags;
/* free non-accelerated child nodes for this listener */
INIT_LIST_HEAD(&reset_list);
if (free_hanging_nodes) {
spin_lock_irqsave(&cm_core->ht_lock, flags);
list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
cm_node = container_of(list_pos, struct i40iw_cm_node, list);
if ((cm_node->listener == listener) && !cm_node->accelerated) {
atomic_inc(&cm_node->ref_count);
list_add(&cm_node->reset_entry, &reset_list);
}
}
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
}
list_for_each_safe(list_pos, list_temp, &reset_list) {
cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
loopback = cm_node->loopbackpartner;
if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
i40iw_rem_ref_cm_node(cm_node);
} else {
if (!loopback) {
i40iw_cleanup_retrans_entry(cm_node);
err = i40iw_send_reset(cm_node);
if (err) {
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_pr_err("send reset\n");
} else {
old_state = cm_node->state;
cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
i40iw_rem_ref_cm_node(cm_node);
}
} else {
struct i40iw_cm_event event;
event.cm_node = loopback;
memcpy(event.cm_info.rem_addr,
loopback->rem_addr, sizeof(event.cm_info.rem_addr));
memcpy(event.cm_info.loc_addr,
loopback->loc_addr, sizeof(event.cm_info.loc_addr));
event.cm_info.rem_port = loopback->rem_port;
event.cm_info.loc_port = loopback->loc_port;
event.cm_info.cm_id = loopback->cm_id;
event.cm_info.ipv4 = loopback->ipv4;
atomic_inc(&loopback->ref_count);
loopback->state = I40IW_CM_STATE_CLOSED;
i40iw_event_connect_error(&event);
cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
i40iw_rem_ref_cm_node(cm_node);
}
}
}
if (!atomic_dec_return(&listener->ref_count)) {
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
list_del(&listener->list);
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
if (listener->iwdev) {
if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
i40iw_manage_apbvt(listener->iwdev,
listener->loc_port,
I40IW_MANAGE_APBVT_DEL);
memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
nfo.loc_port = listener->loc_port;
nfo.ipv4 = listener->ipv4;
nfo.vlan_id = listener->vlan_id;
if (!list_empty(&listener->child_listen_list)) {
i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
} else {
if (listener->qhash_set)
i40iw_manage_qhash(listener->iwdev,
&nfo,
I40IW_QHASH_TYPE_TCP_SYN,
I40IW_QHASH_MANAGE_TYPE_DELETE,
NULL,
false);
}
}
cm_core->stats_listen_destroyed++;
kfree(listener);
cm_core->stats_listen_nodes_destroyed++;
listener = NULL;
ret = 0;
}
if (listener) {
if (atomic_read(&listener->pend_accepts_cnt) > 0)
i40iw_debug(cm_core->dev,
I40IW_DEBUG_CM,
"%s: listener (%p) pending accepts=%u\n",
__func__,
listener,
atomic_read(&listener->pend_accepts_cnt));
}
return ret;
}
/**
* i40iw_cm_del_listen - delete a linstener
* @cm_core: cm's core
* @listener: passive connection's listener
* @apbvt_del: flag to delete apbvt
*/
static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
struct i40iw_cm_listener *listener,
bool apbvt_del)
{
listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
listener->cm_id = NULL; /* going to be destroyed pretty soon */
return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
}
/**
* i40iw_addr_resolve_neigh - resolve neighbor address
* @iwdev: iwarp device structure
* @src_ip: local ip address
* @dst_ip: remote ip address
* @arpindex: if there is an arp entry
*/
static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
u32 src_ip,
u32 dst_ip,
int arpindex)
{
struct rtable *rt;
struct neighbour *neigh;
int rc = arpindex;
struct net_device *netdev = iwdev->netdev;
__be32 dst_ipaddr = htonl(dst_ip);
__be32 src_ipaddr = htonl(src_ip);
rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
if (IS_ERR(rt)) {
i40iw_pr_err("ip_route_output\n");
return rc;
}
if (netif_is_bond_slave(netdev))
netdev = netdev_master_upper_dev_get(netdev);
neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
rcu_read_lock();
if (neigh) {
if (neigh->nud_state & NUD_VALID) {
if (arpindex >= 0) {
if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
neigh->ha))
/* Mac address same as arp table */
goto resolve_neigh_exit;
i40iw_manage_arp_cache(iwdev,
iwdev->arp_table[arpindex].mac_addr,
&dst_ip,
true,
I40IW_ARP_DELETE);
}
i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
} else {
neigh_event_send(neigh, NULL);
}
}
resolve_neigh_exit:
rcu_read_unlock();
if (neigh)
neigh_release(neigh);
ip_rt_put(rt);
return rc;
}
/**
* i40iw_get_dst_ipv6
*/
static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
struct sockaddr_in6 *dst_addr)
{
struct dst_entry *dst;
struct flowi6 fl6;
memset(&fl6, 0, sizeof(fl6));
fl6.daddr = dst_addr->sin6_addr;
fl6.saddr = src_addr->sin6_addr;
if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
fl6.flowi6_oif = dst_addr->sin6_scope_id;
dst = ip6_route_output(&init_net, NULL, &fl6);
return dst;
}
/**
* i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
* @iwdev: iwarp device structure
* @dst_ip: remote ip address
* @arpindex: if there is an arp entry
*/
static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
u32 *src,
u32 *dest,
int arpindex)
{
struct neighbour *neigh;
int rc = arpindex;
struct net_device *netdev = iwdev->netdev;
struct dst_entry *dst;
struct sockaddr_in6 dst_addr;
struct sockaddr_in6 src_addr;
memset(&dst_addr, 0, sizeof(dst_addr));
dst_addr.sin6_family = AF_INET6;
i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
memset(&src_addr, 0, sizeof(src_addr));
src_addr.sin6_family = AF_INET6;
i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
if (!dst || dst->error) {
if (dst) {
i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
dst->error);
dst_release(dst);
}
return rc;
}
if (netif_is_bond_slave(netdev))
netdev = netdev_master_upper_dev_get(netdev);
neigh = dst_neigh_lookup(dst, &dst_addr);
rcu_read_lock();
if (neigh) {
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
if (neigh->nud_state & NUD_VALID) {
if (arpindex >= 0) {
if (ether_addr_equal
(iwdev->arp_table[arpindex].mac_addr,
neigh->ha)) {
/* Mac address same as in arp table */
goto resolve_neigh_exit6;
}
i40iw_manage_arp_cache(iwdev,
iwdev->arp_table[arpindex].mac_addr,
dest,
false,
I40IW_ARP_DELETE);
}
i40iw_manage_arp_cache(iwdev,
neigh->ha,
dest,
false,
I40IW_ARP_ADD);
rc = i40iw_arp_table(iwdev,
dest,
false,
NULL,
I40IW_ARP_RESOLVE);
} else {
neigh_event_send(neigh, NULL);
}
}
resolve_neigh_exit6:
rcu_read_unlock();
if (neigh)
neigh_release(neigh);
dst_release(dst);
return rc;
}
/**
* i40iw_ipv4_is_loopback - check if loopback
* @loc_addr: local addr to compare
* @rem_addr: remote address
*/
static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
{
return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
}
/**
* i40iw_ipv6_is_loopback - check if loopback
* @loc_addr: local addr to compare
* @rem_addr: remote address
*/
static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
{
struct in6_addr raddr6;
i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
}
/**
* i40iw_make_cm_node - create a new instance of a cm node
* @cm_core: cm's core
* @iwdev: iwarp device structure
* @cm_info: quad info for connection
* @listener: passive connection's listener
*/
static struct i40iw_cm_node *i40iw_make_cm_node(
struct i40iw_cm_core *cm_core,
struct i40iw_device *iwdev,
struct i40iw_cm_info *cm_info,
struct i40iw_cm_listener *listener)
{
struct i40iw_cm_node *cm_node;
struct timespec ts;
int oldarpindex;
int arpindex;
struct net_device *netdev = iwdev->netdev;
/* create an hte and cm_node for this instance */
cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
if (!cm_node)
return NULL;
/* set our node specific transport info */
cm_node->ipv4 = cm_info->ipv4;
cm_node->vlan_id = cm_info->vlan_id;
memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
cm_node->loc_port = cm_info->loc_port;
cm_node->rem_port = cm_info->rem_port;
cm_node->mpa_frame_rev = iwdev->mpa_version;
cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
cm_node->ird_size = I40IW_MAX_IRD_SIZE;
cm_node->ord_size = I40IW_MAX_ORD_SIZE;
cm_node->listener = listener;
cm_node->cm_id = cm_info->cm_id;
ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
spin_lock_init(&cm_node->retrans_list_lock);
atomic_set(&cm_node->ref_count, 1);
/* associate our parent CM core */
cm_node->cm_core = cm_core;
cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
cm_node->tcp_cntxt.rcv_wnd =
I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
ts = current_kernel_time();
cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
cm_node->tcp_cntxt.mss = iwdev->mss;
cm_node->iwdev = iwdev;
cm_node->dev = &iwdev->sc_dev;
if ((cm_node->ipv4 &&
i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
(!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
cm_node->rem_addr))) {
arpindex = i40iw_arp_table(iwdev,
cm_node->rem_addr,
false,
NULL,
I40IW_ARP_RESOLVE);
} else {
oldarpindex = i40iw_arp_table(iwdev,
cm_node->rem_addr,
false,
NULL,
I40IW_ARP_RESOLVE);
if (cm_node->ipv4)
arpindex = i40iw_addr_resolve_neigh(iwdev,
cm_info->loc_addr[0],
cm_info->rem_addr[0],
oldarpindex);
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 (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
cm_node->apbvt_set && cm_node->iwdev) {
i40iw_manage_apbvt(cm_node->iwdev,
cm_node->loc_port,
I40IW_MANAGE_APBVT_DEL);
i40iw_get_addr_info(cm_node, &nfo);
if (cm_node->qhash_set) {
i40iw_manage_qhash(cm_node->iwdev,
&nfo,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_DELETE,
NULL,
false);
cm_node->qhash_set = 0;
}
}
}
iwqp = cm_node->iwqp;
if (iwqp) {
iwqp->cm_node = NULL;
i40iw_rem_ref(&iwqp->ibqp);
cm_node->iwqp = NULL;
} else if (cm_node->qhash_set) {
i40iw_get_addr_info(cm_node, &nfo);
i40iw_manage_qhash(cm_node->iwdev,
&nfo,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_DELETE,
NULL,
false);
cm_node->qhash_set = 0;
}
cm_node->cm_core->stats_nodes_destroyed++;
kfree(cm_node);
}
/**
* i40iw_handle_fin_pkt - FIN packet received
* @cm_node: connection's node
*/
static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
{
u32 ret;
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_RCVD:
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_MPAREJ_RCVD:
cm_node->tcp_cntxt.rcv_nxt++;
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_LAST_ACK;
i40iw_send_fin(cm_node);
break;
case I40IW_CM_STATE_MPAREQ_SENT:
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
cm_node->tcp_cntxt.rcv_nxt++;
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_FIN_WAIT1:
cm_node->tcp_cntxt.rcv_nxt++;
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSING;
i40iw_send_ack(cm_node);
/*
* Wait for ACK as this is simultaneous close.
* After we receive ACK, do not send anything.
* Just rm the node.
*/
break;
case I40IW_CM_STATE_FIN_WAIT2:
cm_node->tcp_cntxt.rcv_nxt++;
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_TIME_WAIT;
i40iw_send_ack(cm_node);
ret =
i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
if (ret)
i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
break;
case I40IW_CM_STATE_TIME_WAIT:
cm_node->tcp_cntxt.rcv_nxt++;
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_rem_ref_cm_node(cm_node);
break;
case I40IW_CM_STATE_OFFLOADED:
default:
i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
break;
}
}
/**
* i40iw_handle_rst_pkt - process received RST packet
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
i40iw_cleanup_retrans_entry(cm_node);
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_MPAREQ_SENT:
switch (cm_node->mpa_frame_rev) {
case IETF_MPA_V2:
cm_node->mpa_frame_rev = IETF_MPA_V1;
/* send a syn and goto syn sent state */
cm_node->state = I40IW_CM_STATE_SYN_SENT;
if (i40iw_send_syn(cm_node, 0))
i40iw_active_open_err(cm_node, false);
break;
case IETF_MPA_V1:
default:
i40iw_active_open_err(cm_node, false);
break;
}
break;
case I40IW_CM_STATE_MPAREQ_RCVD:
atomic_add_return(1, &cm_node->passive_state);
break;
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_SYN_RCVD:
case I40IW_CM_STATE_LISTENING:
i40iw_pr_err("Bad state state = %d\n", cm_node->state);
i40iw_passive_open_err(cm_node, false);
break;
case I40IW_CM_STATE_OFFLOADED:
i40iw_active_open_err(cm_node, false);
break;
case I40IW_CM_STATE_CLOSED:
break;
case I40IW_CM_STATE_FIN_WAIT2:
case I40IW_CM_STATE_FIN_WAIT1:
case I40IW_CM_STATE_LAST_ACK:
cm_node->cm_id->rem_ref(cm_node->cm_id);
case I40IW_CM_STATE_TIME_WAIT:
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_rem_ref_cm_node(cm_node);
break;
default:
break;
}
}
/**
* i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
int ret;
int datasize = rbuf->datalen;
u8 *dataloc = rbuf->data;
enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
u32 res_type;
ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
if (ret) {
if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
i40iw_active_open_err(cm_node, true);
else
i40iw_passive_open_err(cm_node, true);
return;
}
switch (cm_node->state) {
case I40IW_CM_STATE_ESTABLISHED:
if (res_type == I40IW_MPA_REQUEST_REJECT)
i40iw_pr_err("state for reject\n");
cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
type = I40IW_CM_EVENT_MPA_REQ;
i40iw_send_ack(cm_node); /* ACK received MPA request */
atomic_set(&cm_node->passive_state,
I40IW_PASSIVE_STATE_INDICATED);
break;
case I40IW_CM_STATE_MPAREQ_SENT:
i40iw_cleanup_retrans_entry(cm_node);
if (res_type == I40IW_MPA_REQUEST_REJECT) {
type = I40IW_CM_EVENT_MPA_REJECT;
cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
} else {
type = I40IW_CM_EVENT_CONNECTED;
cm_node->state = I40IW_CM_STATE_OFFLOADED;
i40iw_send_ack(cm_node);
}
break;
default:
pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
break;
}
i40iw_create_event(cm_node, type);
}
/**
* i40iw_indicate_pkt_err - Send up err event to cm
* @cm_node: connection's node
*/
static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
{
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_MPAREQ_SENT:
i40iw_active_open_err(cm_node, true);
break;
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_SYN_RCVD:
i40iw_passive_open_err(cm_node, true);
break;
case I40IW_CM_STATE_OFFLOADED:
default:
break;
}
}
/**
* i40iw_check_syn - Check for error on received syn ack
* @cm_node: connection's node
* @tcph: pointer tcp header
*/
static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
{
int err = 0;
if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
err = 1;
i40iw_active_open_err(cm_node, true);
}
return err;
}
/**
* i40iw_check_seq - check seq numbers if OK
* @cm_node: connection's node
* @tcph: pointer tcp header
*/
static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
{
int err = 0;
u32 seq;
u32 ack_seq;
u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
u32 rcv_wnd;
seq = ntohl(tcph->seq);
ack_seq = ntohl(tcph->ack_seq);
rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
if (ack_seq != loc_seq_num)
err = -1;
else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
err = -1;
if (err) {
i40iw_pr_err("seq number\n");
i40iw_indicate_pkt_err(cm_node);
}
return err;
}
/**
* i40iw_handle_syn_pkt - is for Passive node
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
int ret;
u32 inc_sequence;
int optionsize;
struct i40iw_cm_info nfo;
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
inc_sequence = ntohl(tcph->seq);
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_MPAREQ_SENT:
/* Rcvd syn on active open connection */
i40iw_active_open_err(cm_node, 1);
break;
case I40IW_CM_STATE_LISTENING:
/* Passive OPEN */
if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
cm_node->listener->backlog) {
cm_node->cm_core->stats_backlog_drops++;
i40iw_passive_open_err(cm_node, false);
break;
}
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
if (ret) {
i40iw_passive_open_err(cm_node, false);
/* drop pkt */
break;
}
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
cm_node->accept_pend = 1;
atomic_inc(&cm_node->listener->pend_accepts_cnt);
cm_node->state = I40IW_CM_STATE_SYN_RCVD;
i40iw_get_addr_info(cm_node, &nfo);
ret = i40iw_manage_qhash(cm_node->iwdev,
&nfo,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_ADD,
(void *)cm_node,
false);
cm_node->qhash_set = true;
break;
case I40IW_CM_STATE_CLOSED:
i40iw_cleanup_retrans_entry(cm_node);
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_OFFLOADED:
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_FIN_WAIT1:
case I40IW_CM_STATE_FIN_WAIT2:
case I40IW_CM_STATE_MPAREQ_RCVD:
case I40IW_CM_STATE_LAST_ACK:
case I40IW_CM_STATE_CLOSING:
case I40IW_CM_STATE_UNKNOWN:
default:
break;
}
}
/**
* i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
int ret;
u32 inc_sequence;
int optionsize;
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
inc_sequence = ntohl(tcph->seq);
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_SENT:
i40iw_cleanup_retrans_entry(cm_node);
/* active open */
if (i40iw_check_syn(cm_node, tcph)) {
i40iw_pr_err("check syn fail\n");
return;
}
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
/* setup options */
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
if (ret) {
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"cm_node=%p tcp_options failed\n",
cm_node);
break;
}
i40iw_cleanup_retrans_entry(cm_node);
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
i40iw_send_ack(cm_node); /* ACK for the syn_ack */
ret = i40iw_send_mpa_request(cm_node);
if (ret) {
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"cm_node=%p i40iw_send_mpa_request failed\n",
cm_node);
break;
}
cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
break;
case I40IW_CM_STATE_MPAREQ_RCVD:
i40iw_passive_open_err(cm_node, true);
break;
case I40IW_CM_STATE_LISTENING:
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_CLOSED:
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
i40iw_cleanup_retrans_entry(cm_node);
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_FIN_WAIT1:
case I40IW_CM_STATE_FIN_WAIT2:
case I40IW_CM_STATE_LAST_ACK:
case I40IW_CM_STATE_OFFLOADED:
case I40IW_CM_STATE_CLOSING:
case I40IW_CM_STATE_UNKNOWN:
case I40IW_CM_STATE_MPAREQ_SENT:
default:
break;
}
}
/**
* i40iw_handle_ack_pkt - process packet with ACK
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
u32 inc_sequence;
int ret = 0;
int optionsize;
u32 datasize = rbuf->datalen;
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
if (i40iw_check_seq(cm_node, tcph))
return -EINVAL;
inc_sequence = ntohl(tcph->seq);
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_RCVD:
i40iw_cleanup_retrans_entry(cm_node);
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
if (ret)
break;
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
cm_node->state = I40IW_CM_STATE_ESTABLISHED;
if (datasize) {
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
i40iw_handle_rcv_mpa(cm_node, rbuf);
}
break;
case I40IW_CM_STATE_ESTABLISHED:
i40iw_cleanup_retrans_entry(cm_node);
if (datasize) {
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
i40iw_handle_rcv_mpa(cm_node, rbuf);
}
break;
case I40IW_CM_STATE_MPAREQ_SENT:
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
if (datasize) {
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
i40iw_handle_rcv_mpa(cm_node, rbuf);
}
break;
case I40IW_CM_STATE_LISTENING:
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_CLOSED:
i40iw_cleanup_retrans_entry(cm_node);
atomic_inc(&cm_node->ref_count);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_LAST_ACK:
case I40IW_CM_STATE_CLOSING:
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_CLOSED;
if (!cm_node->accept_pend)
cm_node->cm_id->rem_ref(cm_node->cm_id);
i40iw_rem_ref_cm_node(cm_node);
break;
case I40IW_CM_STATE_FIN_WAIT1:
i40iw_cleanup_retrans_entry(cm_node);
cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
break;
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_FIN_WAIT2:
case I40IW_CM_STATE_OFFLOADED:
case I40IW_CM_STATE_MPAREQ_RCVD:
case I40IW_CM_STATE_UNKNOWN:
default:
i40iw_cleanup_retrans_entry(cm_node);
break;
}
return ret;
}
/**
* i40iw_process_packet - process cm packet
* @cm_node: connection's node
* @rbuf: receive buffer
*/
static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
struct i40iw_puda_buf *rbuf)
{
enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
u32 fin_set = 0;
int ret;
if (tcph->rst) {
pkt_type = I40IW_PKT_TYPE_RST;
} else if (tcph->syn) {
pkt_type = I40IW_PKT_TYPE_SYN;
if (tcph->ack)
pkt_type = I40IW_PKT_TYPE_SYNACK;
} else if (tcph->ack) {
pkt_type = I40IW_PKT_TYPE_ACK;
}
if (tcph->fin)
fin_set = 1;
switch (pkt_type) {
case I40IW_PKT_TYPE_SYN:
i40iw_handle_syn_pkt(cm_node, rbuf);
break;
case I40IW_PKT_TYPE_SYNACK:
i40iw_handle_synack_pkt(cm_node, rbuf);
break;
case I40IW_PKT_TYPE_ACK:
ret = i40iw_handle_ack_pkt(cm_node, rbuf);
if (fin_set && !ret)
i40iw_handle_fin_pkt(cm_node);
break;
case I40IW_PKT_TYPE_RST:
i40iw_handle_rst_pkt(cm_node, rbuf);
break;
default:
if (fin_set &&
(!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
i40iw_handle_fin_pkt(cm_node);
break;
}
}
/**
* i40iw_make_listen_node - create a listen node with params
* @cm_core: cm's core
* @iwdev: iwarp device structure
* @cm_info: quad info for connection
*/
static struct i40iw_cm_listener *i40iw_make_listen_node(
struct i40iw_cm_core *cm_core,
struct i40iw_device *iwdev,
struct i40iw_cm_info *cm_info)
{
struct i40iw_cm_listener *listener;
unsigned long flags;
/* cannot have multiple matching listeners */
listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
cm_info->loc_port,
cm_info->vlan_id,
I40IW_CM_LISTENER_EITHER_STATE);
if (listener &&
(listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
atomic_dec(&listener->ref_count);
i40iw_debug(cm_core->dev,
I40IW_DEBUG_CM,
"Not creating listener since it already exists\n");
return NULL;
}
if (!listener) {
/* create a CM listen node (1/2 node to compare incoming traffic to) */
listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
if (!listener)
return NULL;
cm_core->stats_listen_nodes_created++;
memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
listener->loc_port = cm_info->loc_port;
INIT_LIST_HEAD(&listener->child_listen_list);
atomic_set(&listener->ref_count, 1);
} else {
listener->reused_node = 1;
}
listener->cm_id = cm_info->cm_id;
listener->ipv4 = cm_info->ipv4;
listener->vlan_id = cm_info->vlan_id;
atomic_set(&listener->pend_accepts_cnt, 0);
listener->cm_core = cm_core;
listener->iwdev = iwdev;
listener->backlog = cm_info->backlog;
listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
if (!listener->reused_node) {
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
list_add(&listener->list, &cm_core->listen_nodes);
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
}
return listener;
}
/**
* i40iw_create_cm_node - make a connection node with params
* @cm_core: cm's core
* @iwdev: iwarp device structure
* @private_data_len: len to provate data for mpa request
* @private_data: pointer to private data for connection
* @cm_info: quad info for connection
*/
static struct i40iw_cm_node *i40iw_create_cm_node(
struct i40iw_cm_core *cm_core,
struct i40iw_device *iwdev,
u16 private_data_len,
void *private_data,
struct i40iw_cm_info *cm_info)
{
struct i40iw_cm_node *cm_node;
struct i40iw_cm_listener *loopback_remotelistener;
struct i40iw_cm_node *loopback_remotenode;
struct i40iw_cm_info loopback_cm_info;
/* create a CM connection node */
cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
if (!cm_node)
return NULL;
/* set our node side to client (active) side */
cm_node->tcp_cntxt.client = 1;
cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
loopback_remotelistener = i40iw_find_listener(
cm_core,
cm_info->rem_addr,
cm_node->rem_port,
cm_node->vlan_id,
I40IW_CM_LISTENER_ACTIVE_STATE);
if (!loopback_remotelistener) {
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
} else {
loopback_cm_info = *cm_info;
loopback_cm_info.loc_port = cm_info->rem_port;
loopback_cm_info.rem_port = cm_info->loc_port;
loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
loopback_cm_info.ipv4 = cm_info->ipv4;
loopback_remotenode = i40iw_make_cm_node(cm_core,
iwdev,
&loopback_cm_info,
loopback_remotelistener);
if (!loopback_remotenode) {
i40iw_rem_ref_cm_node(cm_node);
return NULL;
}
cm_core->stats_loopbacks++;
loopback_remotenode->loopbackpartner = cm_node;
loopback_remotenode->tcp_cntxt.rcv_wscale =
I40IW_CM_DEFAULT_RCV_WND_SCALE;
cm_node->loopbackpartner = loopback_remotenode;
memcpy(loopback_remotenode->pdata_buf, private_data,
private_data_len);
loopback_remotenode->pdata.size = private_data_len;
cm_node->state = I40IW_CM_STATE_OFFLOADED;
cm_node->tcp_cntxt.rcv_nxt =
loopback_remotenode->tcp_cntxt.loc_seq_num;
loopback_remotenode->tcp_cntxt.rcv_nxt =
cm_node->tcp_cntxt.loc_seq_num;
cm_node->tcp_cntxt.max_snd_wnd =
loopback_remotenode->tcp_cntxt.rcv_wnd;
loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
}
return cm_node;
}
cm_node->pdata.size = private_data_len;
cm_node->pdata.addr = cm_node->pdata_buf;
memcpy(cm_node->pdata_buf, private_data, private_data_len);
cm_node->state = I40IW_CM_STATE_SYN_SENT;
return cm_node;
}
/**
* i40iw_cm_reject - reject and teardown a connection
* @cm_node: connection's node
* @pdate: ptr to private data for reject
* @plen: size of private data
*/
static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
{
int ret = 0;
int err;
int passive_state;
struct iw_cm_id *cm_id = cm_node->cm_id;
struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
if (cm_node->tcp_cntxt.client)
return ret;
i40iw_cleanup_retrans_entry(cm_node);
if (!loopback) {
passive_state = atomic_add_return(1, &cm_node->passive_state);
if (passive_state == I40IW_SEND_RESET_EVENT) {
cm_node->state = I40IW_CM_STATE_CLOSED;
i40iw_rem_ref_cm_node(cm_node);
} else {
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
i40iw_rem_ref_cm_node(cm_node);
} else {
ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
if (ret) {
cm_node->state = I40IW_CM_STATE_CLOSED;
err = i40iw_send_reset(cm_node);
if (err)
i40iw_pr_err("send reset failed\n");
} else {
cm_id->add_ref(cm_id);
}
}
}
} else {
cm_node->cm_id = NULL;
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
i40iw_rem_ref_cm_node(cm_node);
i40iw_rem_ref_cm_node(loopback);
} else {
ret = i40iw_send_cm_event(loopback,
loopback->cm_id,
IW_CM_EVENT_CONNECT_REPLY,
-ECONNREFUSED);
i40iw_rem_ref_cm_node(cm_node);
loopback->state = I40IW_CM_STATE_CLOSING;
cm_id = loopback->cm_id;
i40iw_rem_ref_cm_node(loopback);
cm_id->rem_ref(cm_id);
}
}
return ret;
}
/**
* i40iw_cm_close - close of cm connection
* @cm_node: connection's node
*/
static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
{
int ret = 0;
if (!cm_node)
return -EINVAL;
switch (cm_node->state) {
case I40IW_CM_STATE_SYN_RCVD:
case I40IW_CM_STATE_SYN_SENT:
case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
case I40IW_CM_STATE_ESTABLISHED:
case I40IW_CM_STATE_ACCEPTING:
case I40IW_CM_STATE_MPAREQ_SENT:
case I40IW_CM_STATE_MPAREQ_RCVD:
i40iw_cleanup_retrans_entry(cm_node);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_CLOSE_WAIT:
cm_node->state = I40IW_CM_STATE_LAST_ACK;
i40iw_send_fin(cm_node);
break;
case I40IW_CM_STATE_FIN_WAIT1:
case I40IW_CM_STATE_FIN_WAIT2:
case I40IW_CM_STATE_LAST_ACK:
case I40IW_CM_STATE_TIME_WAIT:
case I40IW_CM_STATE_CLOSING:
ret = -1;
break;
case I40IW_CM_STATE_LISTENING:
i40iw_cleanup_retrans_entry(cm_node);
i40iw_send_reset(cm_node);
break;
case I40IW_CM_STATE_MPAREJ_RCVD:
case I40IW_CM_STATE_UNKNOWN:
case I40IW_CM_STATE_INITED:
case I40IW_CM_STATE_CLOSED:
case I40IW_CM_STATE_LISTENER_DESTROYED:
i40iw_rem_ref_cm_node(cm_node);
break;
case I40IW_CM_STATE_OFFLOADED:
if (cm_node->send_entry)
i40iw_pr_err("send_entry\n");
i40iw_rem_ref_cm_node(cm_node);
break;
}
return ret;
}
/**
* i40iw_receive_ilq - recv an ETHERNET packet, and process it
* through CM
* @dev: FPK dev struct
* @rbuf: receive buffer
*/
void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
{
struct i40iw_cm_node *cm_node;
struct i40iw_cm_listener *listener;
struct iphdr *iph;
struct ipv6hdr *ip6h;
struct tcphdr *tcph;
struct i40iw_cm_info cm_info;
struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
struct i40iw_cm_core *cm_core = &iwdev->cm_core;
struct vlan_ethhdr *ethh;
/* if vlan, then maclen = 18 else 14 */
iph = (struct iphdr *)rbuf->iph;
memset(&cm_info, 0, sizeof(cm_info));
i40iw_debug_buf(dev,
I40IW_DEBUG_ILQ,
"RECEIVE ILQ BUFFER",
rbuf->mem.va,
rbuf->totallen);
ethh = (struct vlan_ethhdr *)rbuf->mem.va;
if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
i40iw_debug(cm_core->dev,
I40IW_DEBUG_CM,
"%s vlan_id=%d\n",
__func__,
cm_info.vlan_id);
} else {
cm_info.vlan_id = I40IW_NO_VLAN;
}
tcph = (struct tcphdr *)rbuf->tcph;
if (rbuf->ipv4) {
cm_info.loc_addr[0] = ntohl(iph->daddr);
cm_info.rem_addr[0] = ntohl(iph->saddr);
cm_info.ipv4 = true;
} else {
ip6h = (struct ipv6hdr *)rbuf->iph;
i40iw_copy_ip_ntohl(cm_info.loc_addr,
ip6h->daddr.in6_u.u6_addr32);
i40iw_copy_ip_ntohl(cm_info.rem_addr,
ip6h->saddr.in6_u.u6_addr32);
cm_info.ipv4 = false;
}
cm_info.loc_port = ntohs(tcph->dest);
cm_info.rem_port = ntohs(tcph->source);
cm_node = i40iw_find_node(cm_core,
cm_info.rem_port,
cm_info.rem_addr,
cm_info.loc_port,
cm_info.loc_addr,
true);
if (!cm_node) {
/* Only type of packet accepted are for */
/* the PASSIVE open (syn only) */
if (!tcph->syn || tcph->ack)
return;
listener =
i40iw_find_listener(cm_core,
cm_info.loc_addr,
cm_info.loc_port,
cm_info.vlan_id,
I40IW_CM_LISTENER_ACTIVE_STATE);
if (!listener) {
cm_info.cm_id = NULL;
i40iw_debug(cm_core->dev,
I40IW_DEBUG_CM,
"%s no listener found\n",
__func__);
return;
}
cm_info.cm_id = listener->cm_id;
cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
if (!cm_node) {
i40iw_debug(cm_core->dev,
I40IW_DEBUG_CM,
"%s allocate node failed\n",
__func__);
atomic_dec(&listener->ref_count);
return;
}
if (!tcph->rst && !tcph->fin) {
cm_node->state = I40IW_CM_STATE_LISTENING;
} else {
i40iw_rem_ref_cm_node(cm_node);
return;
}
atomic_inc(&cm_node->ref_count);
} else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
i40iw_rem_ref_cm_node(cm_node);
return;
}
i40iw_process_packet(cm_node, rbuf);
i40iw_rem_ref_cm_node(cm_node);
}
/**
* i40iw_setup_cm_core - allocate a top level instance of a cm
* core
* @iwdev: iwarp device structure
*/
void i40iw_setup_cm_core(struct i40iw_device *iwdev)
{
struct i40iw_cm_core *cm_core = &iwdev->cm_core;
cm_core->iwdev = iwdev;
cm_core->dev = &iwdev->sc_dev;
INIT_LIST_HEAD(&cm_core->connected_nodes);
INIT_LIST_HEAD(&cm_core->listen_nodes);
init_timer(&cm_core->tcp_timer);
cm_core->tcp_timer.function = i40iw_cm_timer_tick;
cm_core->tcp_timer.data = (unsigned long)cm_core;
spin_lock_init(&cm_core->ht_lock);
spin_lock_init(&cm_core->listen_list_lock);
cm_core->event_wq = alloc_ordered_workqueue("iwewq",
WQ_MEM_RECLAIM);
cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
WQ_MEM_RECLAIM);
}
/**
* i40iw_cleanup_cm_core - deallocate a top level instance of a
* cm core
* @cm_core: cm's core
*/
void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
{
unsigned long flags;
if (!cm_core)
return;
spin_lock_irqsave(&cm_core->ht_lock, flags);
if (timer_pending(&cm_core->tcp_timer))
del_timer_sync(&cm_core->tcp_timer);
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
destroy_workqueue(cm_core->event_wq);
destroy_workqueue(cm_core->disconn_wq);
}
/**
* i40iw_init_tcp_ctx - setup qp context
* @cm_node: connection's node
* @tcp_info: offload info for tcp
* @iwqp: associate qp for the connection
*/
static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
struct i40iw_tcp_offload_info *tcp_info,
struct i40iw_qp *iwqp)
{
tcp_info->ipv4 = cm_node->ipv4;
tcp_info->drop_ooo_seg = true;
tcp_info->wscale = true;
tcp_info->ignore_tcp_opt = true;
tcp_info->ignore_tcp_uns_opt = true;
tcp_info->no_nagle = false;
tcp_info->ttl = I40IW_DEFAULT_TTL;
tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
cm_node->tcp_cntxt.rcv_wscale);
tcp_info->flow_label = 0;
tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
tcp_info->insert_vlan_tag = true;
tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
}
if (cm_node->ipv4) {
tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
tcp_info->arp_idx =
cpu_to_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;
i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
if (cm_node->snd_mark_en) {
iwarp_info->snd_mark_en = true;
iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
}
cm_node->state = I40IW_CM_STATE_OFFLOADED;
tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
/* once tcp_info is set, no need to do it again */
ctx_info->tcp_info_valid = false;
ctx_info->iwarp_info_valid = false;
}
/**
* i40iw_cm_disconn - when a connection is being closed
* @iwqp: associate qp for the connection
*/
int i40iw_cm_disconn(struct i40iw_qp *iwqp)
{
struct disconn_work *work;
struct i40iw_device *iwdev = iwqp->iwdev;
struct i40iw_cm_core *cm_core = &iwdev->cm_core;
work = kzalloc(sizeof(*work), GFP_ATOMIC);
if (!work)
return -ENOMEM; /* Timer will clean up */
i40iw_add_ref(&iwqp->ibqp);
work->iwqp = iwqp;
INIT_WORK(&work->work, i40iw_disconnect_worker);
queue_work(cm_core->disconn_wq, &work->work);
return 0;
}
/**
* i40iw_qp_disconnect - free qp and close cm
* @iwqp: associate qp for the connection
*/
static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
{
struct i40iw_device *iwdev;
struct i40iw_ib_device *iwibdev;
iwdev = to_iwdev(iwqp->ibqp.device);
if (!iwdev) {
i40iw_pr_err("iwdev == NULL\n");
return;
}
iwibdev = iwdev->iwibdev;
if (iwqp->active_conn) {
/* indicate this connection is NOT active */
iwqp->active_conn = 0;
} else {
/* Need to free the Last Streaming Mode Message */
if (iwqp->ietf_mem.va) {
if (iwqp->lsmm_mr)
iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
}
}
/* close the CM node down if it is still active */
if (iwqp->cm_node) {
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
i40iw_cm_close(iwqp->cm_node);
}
}
/**
* i40iw_cm_disconn_true - called by worker thread to disconnect qp
* @iwqp: associate qp for the connection
*/
static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
{
struct iw_cm_id *cm_id;
struct i40iw_device *iwdev;
struct i40iw_sc_qp *qp = &iwqp->sc_qp;
u16 last_ae;
u8 original_hw_tcp_state;
u8 original_ibqp_state;
int disconn_status = 0;
int issue_disconn = 0;
int issue_close = 0;
int issue_flush = 0;
struct ib_event ibevent;
unsigned long flags;
int ret;
if (!iwqp) {
i40iw_pr_err("iwqp == NULL\n");
return;
}
spin_lock_irqsave(&iwqp->lock, flags);
cm_id = iwqp->cm_id;
/* make sure we havent already closed this connection */
if (!cm_id) {
spin_unlock_irqrestore(&iwqp->lock, flags);
return;
}
iwdev = to_iwdev(iwqp->ibqp.device);
original_hw_tcp_state = iwqp->hw_tcp_state;
original_ibqp_state = iwqp->ibqp_state;
last_ae = iwqp->last_aeq;
if (qp->term_flags) {
issue_disconn = 1;
issue_close = 1;
iwqp->cm_id = NULL;
/*When term timer expires after cm_timer, don't want
*terminate-handler to issue cm_disconn which can re-free
*a QP even after its refcnt=0.
*/
del_timer(&iwqp->terminate_timer);
if (!iwqp->flush_issued) {
iwqp->flush_issued = 1;
issue_flush = 1;
}
} else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
((original_ibqp_state == IB_QPS_RTS) &&
(last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
issue_disconn = 1;
if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
disconn_status = -ECONNRESET;
}
if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
(original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
(last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
(last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
issue_close = 1;
iwqp->cm_id = NULL;
if (!iwqp->flush_issued) {
iwqp->flush_issued = 1;
issue_flush = 1;
}
}
spin_unlock_irqrestore(&iwqp->lock, flags);
if (issue_flush && !iwqp->destroyed) {
/* Flush the queues */
i40iw_flush_wqes(iwdev, iwqp);
if (qp->term_flags) {
ibevent.device = iwqp->ibqp.device;
ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
ibevent.element.qp = &iwqp->ibqp;
iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
}
}
if (cm_id && cm_id->event_handler) {
if (issue_disconn) {
ret = i40iw_send_cm_event(NULL,
cm_id,
IW_CM_EVENT_DISCONNECT,
disconn_status);
if (ret)
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"disconnect event failed %s: - cm_id = %p\n",
__func__, cm_id);
}
if (issue_close) {
i40iw_qp_disconnect(iwqp);
cm_id->provider_data = iwqp;
ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
if (ret)
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"close event failed %s: - cm_id = %p\n",
__func__, cm_id);
cm_id->rem_ref(cm_id);
}
}
}
/**
* i40iw_disconnect_worker - worker for connection close
* @work: points or disconn structure
*/
static void i40iw_disconnect_worker(struct work_struct *work)
{
struct disconn_work *dwork = container_of(work, struct disconn_work, work);
struct i40iw_qp *iwqp = dwork->iwqp;
kfree(dwork);
i40iw_cm_disconn_true(iwqp);
i40iw_rem_ref(&iwqp->ibqp);
}
/**
* i40iw_accept - registered call for connection to be accepted
* @cm_id: cm information for passive connection
* @conn_param: accpet parameters
*/
int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
struct ib_qp *ibqp;
struct i40iw_qp *iwqp;
struct i40iw_device *iwdev;
struct i40iw_sc_dev *dev;
struct i40iw_cm_node *cm_node;
struct ib_qp_attr attr;
int passive_state;
struct ib_mr *ibmr;
struct i40iw_pd *iwpd;
u16 buf_len = 0;
struct i40iw_kmem_info accept;
enum i40iw_status_code status;
u64 tagged_offset;
memset(&attr, 0, sizeof(attr));
ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
if (!ibqp)
return -EINVAL;
iwqp = to_iwqp(ibqp);
iwdev = iwqp->iwdev;
dev = &iwdev->sc_dev;
cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
cm_node->ipv4 = true;
cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
} else {
cm_node->ipv4 = false;
i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
}
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"Accept vlan_id=%d\n",
cm_node->vlan_id);
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
if (cm_node->loopbackpartner)
i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
i40iw_rem_ref_cm_node(cm_node);
return -EINVAL;
}
passive_state = atomic_add_return(1, &cm_node->passive_state);
if (passive_state == I40IW_SEND_RESET_EVENT) {
i40iw_rem_ref_cm_node(cm_node);
return -ECONNRESET;
}
cm_node->cm_core->stats_accepts++;
iwqp->cm_node = (void *)cm_node;
cm_node->iwqp = iwqp;
buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
if (status)
return -ENOMEM;
cm_node->pdata.size = conn_param->private_data_len;
accept.addr = iwqp->ietf_mem.va;
accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
memcpy(accept.addr + accept.size, conn_param->private_data,
conn_param->private_data_len);
/* setup our first outgoing iWarp send WQE (the IETF frame response) */
if ((cm_node->ipv4 &&
!i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
(!cm_node->ipv4 &&
!i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
iwpd = iwqp->iwpd;
tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
iwqp->ietf_mem.pa,
buf_len,
IB_ACCESS_LOCAL_WRITE,
&tagged_offset);
if (IS_ERR(ibmr)) {
i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
return -ENOMEM;
}
ibmr->pd = &iwpd->ibpd;
ibmr->device = iwpd->ibpd.device;
iwqp->lsmm_mr = ibmr;
if (iwqp->page)
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
if (is_remote_ne020_or_chelsio(cm_node))
dev->iw_priv_qp_ops->qp_send_lsmm(
&iwqp->sc_qp,
iwqp->ietf_mem.va,
(accept.size + conn_param->private_data_len),
ibmr->lkey);
else
dev->iw_priv_qp_ops->qp_send_lsmm(
&iwqp->sc_qp,
iwqp->ietf_mem.va,
(accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
ibmr->lkey);
} else {
if (iwqp->page)
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
}
if (iwqp->page)
kunmap(iwqp->page);
iwqp->cm_id = cm_id;
cm_node->cm_id = cm_id;
cm_id->provider_data = (void *)iwqp;
iwqp->active_conn = 0;
cm_node->lsmm_size = accept.size + conn_param->private_data_len;
i40iw_cm_init_tsa_conn(iwqp, cm_node);
cm_id->add_ref(cm_id);
i40iw_add_ref(&iwqp->ibqp);
i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
attr.qp_state = IB_QPS_RTS;
cm_node->qhash_set = false;
i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
if (cm_node->loopbackpartner) {
cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
/* copy entire MPA frame to our cm_node's frame */
memcpy(cm_node->loopbackpartner->pdata_buf,
conn_param->private_data,
conn_param->private_data_len);
i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
}
cm_node->accelerated = 1;
if (cm_node->accept_pend) {
if (!cm_node->listener)
i40iw_pr_err("cm_node->listener NULL for passive node\n");
atomic_dec(&cm_node->listener->pend_accepts_cnt);
cm_node->accept_pend = 0;
}
return 0;
}
/**
* i40iw_reject - registered call for connection to be rejected
* @cm_id: cm information for passive connection
* @pdata: private data to be sent
* @pdata_len: private data length
*/
int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
struct i40iw_device *iwdev;
struct i40iw_cm_node *cm_node;
struct i40iw_cm_node *loopback;
cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
loopback = cm_node->loopbackpartner;
cm_node->cm_id = cm_id;
cm_node->pdata.size = pdata_len;
iwdev = to_iwdev(cm_id->device);
if (!iwdev)
return -EINVAL;
cm_node->cm_core->stats_rejects++;
if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
return -EINVAL;
if (loopback) {
memcpy(&loopback->pdata_buf, pdata, pdata_len);
loopback->pdata.size = pdata_len;
}
return i40iw_cm_reject(cm_node, pdata, pdata_len);
}
/**
* i40iw_connect - registered call for connection to be established
* @cm_id: cm information for passive connection
* @conn_param: Information about the connection
*/
int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
struct ib_qp *ibqp;
struct i40iw_qp *iwqp;
struct i40iw_device *iwdev;
struct i40iw_cm_node *cm_node;
struct i40iw_cm_info cm_info;
struct sockaddr_in *laddr;
struct sockaddr_in *raddr;
struct sockaddr_in6 *laddr6;
struct sockaddr_in6 *raddr6;
bool qhash_set = false;
int apbvt_set = 0;
enum i40iw_status_code status;
ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
if (!ibqp)
return -EINVAL;
iwqp = to_iwqp(ibqp);
if (!iwqp)
return -EINVAL;
iwdev = to_iwdev(iwqp->ibqp.device);
if (!iwdev)
return -EINVAL;
laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
if (!(laddr->sin_port) || !(raddr->sin_port))
return -EINVAL;
iwqp->active_conn = 1;
iwqp->cm_id = NULL;
cm_id->provider_data = iwqp;
/* set up the connection params for the node */
if (cm_id->remote_addr.ss_family == AF_INET) {
cm_info.ipv4 = true;
memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
cm_info.loc_port = ntohs(laddr->sin_port);
cm_info.rem_port = ntohs(raddr->sin_port);
cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
} else {
cm_info.ipv4 = false;
i40iw_copy_ip_ntohl(cm_info.loc_addr,
laddr6->sin6_addr.in6_u.u6_addr32);
i40iw_copy_ip_ntohl(cm_info.rem_addr,
raddr6->sin6_addr.in6_u.u6_addr32);
cm_info.loc_port = ntohs(laddr6->sin6_port);
cm_info.rem_port = ntohs(raddr6->sin6_port);
i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
}
cm_info.cm_id = cm_id;
if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
(!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
raddr6->sin6_addr.in6_u.u6_addr32,
sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
status = i40iw_manage_qhash(iwdev,
&cm_info,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_ADD,
NULL,
true);
if (status)
return -EINVAL;
qhash_set = true;
}
status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
if (status) {
i40iw_manage_qhash(iwdev,
&cm_info,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_DELETE,
NULL,
false);
return -EINVAL;
}
apbvt_set = 1;
cm_id->add_ref(cm_id);
cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
conn_param->private_data_len,
(void *)conn_param->private_data,
&cm_info);
if (!cm_node)
goto err;
i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
!cm_node->ord_size)
cm_node->ord_size = 1;
cm_node->apbvt_set = apbvt_set;
cm_node->qhash_set = qhash_set;
iwqp->cm_node = cm_node;
cm_node->iwqp = iwqp;
iwqp->cm_id = cm_id;
i40iw_add_ref(&iwqp->ibqp);
if (cm_node->state == I40IW_CM_STATE_SYN_SENT) {
if (i40iw_send_syn(cm_node, 0)) {
i40iw_rem_ref_cm_node(cm_node);
goto err;
}
}
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_node) {
if (cm_node->ipv4)
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"Api - connect() FAILED: dest addr=%pI4",
cm_node->rem_addr);
else
i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
"Api - connect() FAILED: dest addr=%pI6",
cm_node->rem_addr);
}
i40iw_manage_qhash(iwdev,
&cm_info,
I40IW_QHASH_TYPE_TCP_ESTABLISHED,
I40IW_QHASH_MANAGE_TYPE_DELETE,
NULL,
false);
if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
cm_info.loc_port))
i40iw_manage_apbvt(iwdev,
cm_info.loc_port,
I40IW_MANAGE_APBVT_DEL);
cm_id->rem_ref(cm_id);
iwdev->cm_core.stats_connect_errs++;
return -ENOMEM;
}
/**
* i40iw_create_listen - registered call creating listener
* @cm_id: cm information for passive connection
* @backlog: to max accept pending count
*/
int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
{
struct i40iw_device *iwdev;
struct i40iw_cm_listener *cm_listen_node;
struct i40iw_cm_info cm_info;
enum i40iw_status_code ret;
struct sockaddr_in *laddr;
struct sockaddr_in6 *laddr6;
bool wildcard = false;
iwdev = to_iwdev(cm_id->device);
if (!iwdev)
return -EINVAL;
laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
memset(&cm_info, 0, sizeof(cm_info));
if (laddr->sin_family == AF_INET) {
cm_info.ipv4 = true;
cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
cm_info.loc_port = ntohs(laddr->sin_port);
if (laddr->sin_addr.s_addr != INADDR_ANY)
cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
else
wildcard = true;
} else {
cm_info.ipv4 = false;
i40iw_copy_ip_ntohl(cm_info.loc_addr,
laddr6->sin6_addr.in6_u.u6_addr32);
cm_info.loc_port = ntohs(laddr6->sin6_port);
if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
&cm_info.vlan_id,
NULL);
else
wildcard = true;
}
cm_info.backlog = backlog;
cm_info.cm_id = cm_id;
cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
if (!cm_listen_node) {
i40iw_pr_err("cm_listen_node == NULL\n");
return -ENOMEM;
}
cm_id->provider_data = cm_listen_node;
if (!cm_listen_node->reused_node) {
if (wildcard) {
if (cm_info.ipv4)
ret = i40iw_add_mqh_4(iwdev,
&cm_info,
cm_listen_node);
else
ret = i40iw_add_mqh_6(iwdev,
&cm_info,
cm_listen_node);
if (ret)
goto error;
ret = i40iw_manage_apbvt(iwdev,
cm_info.loc_port,
I40IW_MANAGE_APBVT_ADD);
if (ret)
goto error;
} else {
ret = i40iw_manage_qhash(iwdev,
&cm_info,
I40IW_QHASH_TYPE_TCP_SYN,
I40IW_QHASH_MANAGE_TYPE_ADD,
NULL,
true);
if (ret)
goto error;
cm_listen_node->qhash_set = true;
ret = i40iw_manage_apbvt(iwdev,
cm_info.loc_port,
I40IW_MANAGE_APBVT_ADD);
if (ret)
goto error;
}
}
cm_id->add_ref(cm_id);
cm_listen_node->cm_core->stats_listen_created++;
return 0;
error:
i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
return -EINVAL;
}
/**
* i40iw_destroy_listen - registered call to destroy listener
* @cm_id: cm information for passive connection
*/
int i40iw_destroy_listen(struct iw_cm_id *cm_id)
{
struct i40iw_device *iwdev;
iwdev = to_iwdev(cm_id->device);
if (cm_id->provider_data)
i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
else
i40iw_pr_err("cm_id->provider_data was NULL\n");
cm_id->rem_ref(cm_id);
return 0;
}
/**
* i40iw_cm_event_connected - handle connected active node
* @event: the info for cm_node of connection
*/
static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
{
struct i40iw_qp *iwqp;
struct i40iw_device *iwdev;
struct i40iw_cm_node *cm_node;
struct i40iw_sc_dev *dev;
struct ib_qp_attr attr;
struct iw_cm_id *cm_id;
int status;
bool read0;
cm_node = event->cm_node;
cm_id = cm_node->cm_id;
iwqp = (struct i40iw_qp *)cm_id->provider_data;
iwdev = to_iwdev(iwqp->ibqp.device);
dev = &iwdev->sc_dev;
if (iwqp->destroyed) {
status = -ETIMEDOUT;
goto error;
}
i40iw_cm_init_tsa_conn(iwqp, cm_node);
read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
if (iwqp->page)
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
if (iwqp->page)
kunmap(iwqp->page);
status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
if (status)
i40iw_pr_err("send cm event\n");
memset(&attr, 0, sizeof(attr));
attr.qp_state = IB_QPS_RTS;
cm_node->qhash_set = false;
i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
cm_node->accelerated = 1;
if (cm_node->accept_pend) {
if (!cm_node->listener)
i40iw_pr_err("listener is null for passive node\n");
atomic_dec(&cm_node->listener->pend_accepts_cnt);
cm_node->accept_pend = 0;
}
return;
error:
iwqp->cm_id = NULL;
cm_id->provider_data = NULL;
i40iw_send_cm_event(event->cm_node,
cm_id,
IW_CM_EVENT_CONNECT_REPLY,
status);
cm_id->rem_ref(cm_id);
i40iw_rem_ref_cm_node(event->cm_node);
}
/**
* i40iw_cm_event_reset - handle reset
* @event: the info for cm_node of connection
*/
static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
{
struct i40iw_cm_node *cm_node = event->cm_node;
struct iw_cm_id *cm_id = cm_node->cm_id;
struct i40iw_qp *iwqp;
if (!cm_id)
return;
iwqp = cm_id->provider_data;
if (!iwqp)
return;
i40iw_debug(cm_node->dev,
I40IW_DEBUG_CM,
"reset event %p - cm_id = %p\n",
event->cm_node, cm_id);
iwqp->cm_id = NULL;
i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
}
/**
* i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
* @work: pointer of cm event info.
*/
static void i40iw_cm_event_handler(struct work_struct *work)
{
struct i40iw_cm_event *event = container_of(work,
struct i40iw_cm_event,
event_work);
struct i40iw_cm_node *cm_node;
if (!event || !event->cm_node || !event->cm_node->cm_core)
return;
cm_node = event->cm_node;
switch (event->type) {
case I40IW_CM_EVENT_MPA_REQ:
i40iw_send_cm_event(cm_node,
cm_node->cm_id,
IW_CM_EVENT_CONNECT_REQUEST,
0);
break;
case I40IW_CM_EVENT_RESET:
i40iw_cm_event_reset(event);
break;
case I40IW_CM_EVENT_CONNECTED:
if (!event->cm_node->cm_id ||
(event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
break;
i40iw_cm_event_connected(event);
break;
case I40IW_CM_EVENT_MPA_REJECT:
if (!event->cm_node->cm_id ||
(cm_node->state == I40IW_CM_STATE_OFFLOADED))
break;
i40iw_send_cm_event(cm_node,
cm_node->cm_id,
IW_CM_EVENT_CONNECT_REPLY,
-ECONNREFUSED);
break;
case I40IW_CM_EVENT_ABORTED:
if (!event->cm_node->cm_id ||
(event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
break;
i40iw_event_connect_error(event);
break;
default:
i40iw_pr_err("event type = %d\n", event->type);
break;
}
event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
i40iw_rem_ref_cm_node(event->cm_node);
kfree(event);
}
/**
* i40iw_cm_post_event - queue event request for worker thread
* @event: cm node's info for up event call
*/
static void i40iw_cm_post_event(struct i40iw_cm_event *event)
{
atomic_inc(&event->cm_node->ref_count);
event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
INIT_WORK(&event->event_work, i40iw_cm_event_handler);
queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
}
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