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linux_dsm_epyc7002/drivers/infiniband/hw/i40iw/i40iw_cm.c
Linus Torvalds 5d24ae67a9 4.21 merge window pull request 
This has been a fairly typical cycle, with the usual sorts of driver
 updates. Several series continue to come through which improve and
 modernize various parts of the core code, and we finally are starting to
 get the uAPI command interface cleaned up.
 
 - Various driver fixes for bnxt_re, cxgb3/4, hfi1, hns, i40iw, mlx4, mlx5,
   qib, rxe, usnic
 
 - Rework the entire syscall flow for uverbs to be able to run over
   ioctl(). Finally getting past the historic bad choice to use write()
   for command execution
 
 - More functional coverage with the mlx5 'devx' user API
 
 - Start of the HFI1 series for 'TID RDMA'
 
 - SRQ support in the hns driver
 
 - Support for new IBTA defined 2x lane widths
 
 - A big series to consolidate all the driver function pointers into
   a big struct and have drivers provide a 'static const' version of the
   struct instead of open coding initialization
 
 - New 'advise_mr' uAPI to control device caching/loading of page tables
 
 - Support for inline data in SRPT
 
 - Modernize how umad uses the driver core and creates cdev's and sysfs
   files
 
 - First steps toward removing 'uobject' from the view of the drivers
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "This has been a fairly typical cycle, with the usual sorts of driver
  updates. Several series continue to come through which improve and
  modernize various parts of the core code, and we finally are starting
  to get the uAPI command interface cleaned up.

   - Various driver fixes for bnxt_re, cxgb3/4, hfi1, hns, i40iw, mlx4,
     mlx5, qib, rxe, usnic

   - Rework the entire syscall flow for uverbs to be able to run over
     ioctl(). Finally getting past the historic bad choice to use
     write() for command execution

   - More functional coverage with the mlx5 'devx' user API

   - Start of the HFI1 series for 'TID RDMA'

   - SRQ support in the hns driver

   - Support for new IBTA defined 2x lane widths

   - A big series to consolidate all the driver function pointers into a
     big struct and have drivers provide a 'static const' version of the
     struct instead of open coding initialization

   - New 'advise_mr' uAPI to control device caching/loading of page
     tables

   - Support for inline data in SRPT

   - Modernize how umad uses the driver core and creates cdev's and
     sysfs files

   - First steps toward removing 'uobject' from the view of the drivers"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (193 commits)
  RDMA/srpt: Use kmem_cache_free() instead of kfree()
  RDMA/mlx5: Signedness bug in UVERBS_HANDLER()
  IB/uverbs: Signedness bug in UVERBS_HANDLER()
  IB/mlx5: Allocate the per-port Q counter shared when DEVX is supported
  IB/umad: Start using dev_groups of class
  IB/umad: Use class_groups and let core create class file
  IB/umad: Refactor code to use cdev_device_add()
  IB/umad: Avoid destroying device while it is accessed
  IB/umad: Simplify and avoid dynamic allocation of class
  IB/mlx5: Fix wrong error unwind
  IB/mlx4: Remove set but not used variable 'pd'
  RDMA/iwcm: Don't copy past the end of dev_name() string
  IB/mlx5: Fix long EEH recover time with NVMe offloads
  IB/mlx5: Simplify netdev unbinding
  IB/core: Move query port to ioctl
  RDMA/nldev: Expose port_cap_flags2
  IB/core: uverbs copy to struct or zero helper
  IB/rxe: Reuse code which sets port state
  IB/rxe: Make counters thread safe
  IB/mlx5: Use the correct commands for UMEM and UCTX allocation
  ...
2018-12-28 14:57:10 -08:00

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