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4419 lines
121 KiB
4419 lines
121 KiB
/******************************************************************************* |
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* |
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* Copyright (c) 2015-2016 Intel Corporation. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenFabrics.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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*******************************************************************************/ |
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#include <linux/atomic.h> |
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#include <linux/ip.h> |
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#include <linux/tcp.h> |
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#include <linux/init.h> |
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#include <linux/if_arp.h> |
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#include <linux/if_vlan.h> |
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#include <linux/notifier.h> |
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#include <linux/net.h> |
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#include <linux/types.h> |
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#include <linux/timer.h> |
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#include <linux/time.h> |
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#include <linux/delay.h> |
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#include <linux/etherdevice.h> |
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#include <linux/netdevice.h> |
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#include <linux/random.h> |
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#include <linux/list.h> |
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#include <linux/threads.h> |
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#include <linux/highmem.h> |
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#include <net/arp.h> |
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#include <net/ndisc.h> |
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#include <net/neighbour.h> |
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#include <net/route.h> |
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#include <net/addrconf.h> |
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#include <net/ip6_route.h> |
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#include <net/ip_fib.h> |
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#include <net/secure_seq.h> |
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#include <net/tcp.h> |
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#include <asm/checksum.h> |
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#include "i40iw.h" |
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static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); |
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static void i40iw_cm_post_event(struct i40iw_cm_event *event); |
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static void i40iw_disconnect_worker(struct work_struct *work); |
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/** |
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* i40iw_free_sqbuf - put back puda buffer if refcount = 0 |
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* @vsi: pointer to vsi structure |
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* @bufp: puda buffer to free |
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*/ |
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void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp) |
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{ |
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struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; |
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struct i40iw_puda_rsrc *ilq = vsi->ilq; |
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if (!atomic_dec_return(&buf->refcount)) |
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i40iw_puda_ret_bufpool(ilq, buf); |
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} |
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/** |
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* i40iw_derive_hw_ird_setting - Calculate IRD |
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* |
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* @cm_ird: IRD of connection's node |
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* |
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* The ird from the connection is rounded to a supported HW |
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* setting (2,8,32,64) and then encoded for ird_size field of |
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* qp_ctx |
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*/ |
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static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) |
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{ |
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u8 encoded_ird_size; |
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|
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/* ird_size field is encoded in qp_ctx */ |
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switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) { |
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case I40IW_HW_IRD_SETTING_64: |
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encoded_ird_size = 3; |
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break; |
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case I40IW_HW_IRD_SETTING_32: |
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case I40IW_HW_IRD_SETTING_16: |
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encoded_ird_size = 2; |
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break; |
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case I40IW_HW_IRD_SETTING_8: |
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case I40IW_HW_IRD_SETTING_4: |
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encoded_ird_size = 1; |
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break; |
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case I40IW_HW_IRD_SETTING_2: |
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default: |
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encoded_ird_size = 0; |
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break; |
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} |
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return encoded_ird_size; |
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} |
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/** |
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* i40iw_record_ird_ord - Record IRD/ORD passed in |
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* @cm_node: connection's node |
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* @conn_ird: connection IRD |
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* @conn_ord: connection ORD |
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*/ |
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static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird, |
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u32 conn_ord) |
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{ |
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if (conn_ird > I40IW_MAX_IRD_SIZE) |
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conn_ird = I40IW_MAX_IRD_SIZE; |
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if (conn_ord > I40IW_MAX_ORD_SIZE) |
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conn_ord = I40IW_MAX_ORD_SIZE; |
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else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) |
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conn_ord = 1; |
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cm_node->ird_size = conn_ird; |
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cm_node->ord_size = conn_ord; |
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} |
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/** |
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* i40iw_copy_ip_ntohl - change network to host ip |
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* @dst: host ip |
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* @src: big endian |
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*/ |
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void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) |
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{ |
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*dst++ = ntohl(*src++); |
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*dst++ = ntohl(*src++); |
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*dst++ = ntohl(*src++); |
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*dst = ntohl(*src); |
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} |
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/** |
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* i40iw_copy_ip_htonl - change host addr to network ip |
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* @dst: host ip |
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* @src: little endian |
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*/ |
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static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) |
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{ |
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*dst++ = htonl(*src++); |
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*dst++ = htonl(*src++); |
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*dst++ = htonl(*src++); |
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*dst = htonl(*src); |
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} |
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/** |
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* i40iw_fill_sockaddr4 - get addr info for passive connection |
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* @cm_node: connection's node |
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* @event: upper layer's cm event |
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*/ |
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static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, |
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struct iw_cm_event *event) |
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{ |
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struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; |
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struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; |
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laddr->sin_family = AF_INET; |
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raddr->sin_family = AF_INET; |
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laddr->sin_port = htons(cm_node->loc_port); |
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raddr->sin_port = htons(cm_node->rem_port); |
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laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); |
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raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); |
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} |
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/** |
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* i40iw_fill_sockaddr6 - get ipv6 addr info for passive side |
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* @cm_node: connection's node |
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* @event: upper layer's cm event |
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*/ |
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static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, |
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struct iw_cm_event *event) |
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{ |
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struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; |
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struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; |
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laddr6->sin6_family = AF_INET6; |
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raddr6->sin6_family = AF_INET6; |
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laddr6->sin6_port = htons(cm_node->loc_port); |
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raddr6->sin6_port = htons(cm_node->rem_port); |
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i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, |
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cm_node->loc_addr); |
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i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, |
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cm_node->rem_addr); |
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} |
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/** |
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* i40iw_get_addr_info |
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* @cm_node: contains ip/tcp info |
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* @cm_info: to get a copy of the cm_node ip/tcp info |
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*/ |
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static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, |
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struct i40iw_cm_info *cm_info) |
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{ |
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cm_info->ipv4 = cm_node->ipv4; |
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cm_info->vlan_id = cm_node->vlan_id; |
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memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); |
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memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); |
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cm_info->loc_port = cm_node->loc_port; |
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cm_info->rem_port = cm_node->rem_port; |
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cm_info->user_pri = cm_node->user_pri; |
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} |
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/** |
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* i40iw_get_cmevent_info - for cm event upcall |
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* @cm_node: connection's node |
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* @cm_id: upper layers cm struct for the event |
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* @event: upper layer's cm event |
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*/ |
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static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, |
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struct iw_cm_id *cm_id, |
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struct iw_cm_event *event) |
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{ |
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memcpy(&event->local_addr, &cm_id->m_local_addr, |
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sizeof(event->local_addr)); |
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memcpy(&event->remote_addr, &cm_id->m_remote_addr, |
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sizeof(event->remote_addr)); |
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if (cm_node) { |
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event->private_data = (void *)cm_node->pdata_buf; |
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event->private_data_len = (u8)cm_node->pdata.size; |
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event->ird = cm_node->ird_size; |
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event->ord = cm_node->ord_size; |
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} |
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} |
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/** |
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* i40iw_send_cm_event - upcall cm's event handler |
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* @cm_node: connection's node |
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* @cm_id: upper layer's cm info struct |
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* @type: Event type to indicate |
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* @status: status for the event type |
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*/ |
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static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, |
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struct iw_cm_id *cm_id, |
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enum iw_cm_event_type type, |
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int status) |
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{ |
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struct iw_cm_event event; |
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memset(&event, 0, sizeof(event)); |
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event.event = type; |
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event.status = status; |
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switch (type) { |
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case IW_CM_EVENT_CONNECT_REQUEST: |
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if (cm_node->ipv4) |
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i40iw_fill_sockaddr4(cm_node, &event); |
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else |
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i40iw_fill_sockaddr6(cm_node, &event); |
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event.provider_data = (void *)cm_node; |
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event.private_data = (void *)cm_node->pdata_buf; |
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event.private_data_len = (u8)cm_node->pdata.size; |
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event.ird = cm_node->ird_size; |
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break; |
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case IW_CM_EVENT_CONNECT_REPLY: |
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i40iw_get_cmevent_info(cm_node, cm_id, &event); |
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break; |
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case IW_CM_EVENT_ESTABLISHED: |
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event.ird = cm_node->ird_size; |
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event.ord = cm_node->ord_size; |
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break; |
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case IW_CM_EVENT_DISCONNECT: |
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break; |
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case IW_CM_EVENT_CLOSE: |
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break; |
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default: |
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i40iw_pr_err("event type received type = %d\n", type); |
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return -1; |
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} |
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return cm_id->event_handler(cm_id, &event); |
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} |
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/** |
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* i40iw_create_event - create cm event |
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* @cm_node: connection's node |
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* @type: Event type to generate |
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*/ |
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static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, |
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enum i40iw_cm_event_type type) |
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{ |
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struct i40iw_cm_event *event; |
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if (!cm_node->cm_id) |
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return NULL; |
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event = kzalloc(sizeof(*event), GFP_ATOMIC); |
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if (!event) |
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return NULL; |
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event->type = type; |
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event->cm_node = cm_node; |
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memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); |
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memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); |
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event->cm_info.rem_port = cm_node->rem_port; |
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event->cm_info.loc_port = cm_node->loc_port; |
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event->cm_info.cm_id = cm_node->cm_id; |
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i40iw_debug(cm_node->dev, |
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I40IW_DEBUG_CM, |
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"node=%p event=%p type=%u dst=%pI4 src=%pI4\n", |
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cm_node, |
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event, |
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type, |
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event->cm_info.loc_addr, |
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event->cm_info.rem_addr); |
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i40iw_cm_post_event(event); |
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return event; |
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} |
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/** |
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* i40iw_free_retrans_entry - free send entry |
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* @cm_node: connection's node |
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*/ |
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static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) |
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{ |
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struct i40iw_device *iwdev = cm_node->iwdev; |
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struct i40iw_timer_entry *send_entry; |
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send_entry = cm_node->send_entry; |
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if (send_entry) { |
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cm_node->send_entry = NULL; |
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i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf); |
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kfree(send_entry); |
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atomic_dec(&cm_node->ref_count); |
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} |
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} |
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/** |
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* i40iw_cleanup_retrans_entry - free send entry with lock |
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* @cm_node: connection's node |
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*/ |
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static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) |
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{ |
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unsigned long flags; |
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spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
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i40iw_free_retrans_entry(cm_node); |
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spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
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} |
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/** |
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* i40iw_form_cm_frame - get a free packet and build frame |
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* @cm_node: connection's node ionfo to use in frame |
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* @options: pointer to options info |
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* @hdr: pointer mpa header |
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* @pdata: pointer to private data |
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* @flags: indicates FIN or ACK |
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*/ |
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static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, |
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struct i40iw_kmem_info *options, |
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struct i40iw_kmem_info *hdr, |
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struct i40iw_kmem_info *pdata, |
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u8 flags) |
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{ |
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struct i40iw_puda_buf *sqbuf; |
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struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; |
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u8 *buf; |
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struct tcphdr *tcph; |
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struct iphdr *iph; |
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struct ipv6hdr *ip6h; |
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struct ethhdr *ethh; |
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u16 packetsize; |
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u16 eth_hlen = ETH_HLEN; |
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u32 opts_len = 0; |
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u32 pd_len = 0; |
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u32 hdr_len = 0; |
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u16 vtag; |
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sqbuf = i40iw_puda_get_bufpool(vsi->ilq); |
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if (!sqbuf) |
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return NULL; |
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buf = sqbuf->mem.va; |
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if (options) |
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opts_len = (u32)options->size; |
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if (hdr) |
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hdr_len = hdr->size; |
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if (pdata) |
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pd_len = pdata->size; |
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if (cm_node->vlan_id <= VLAN_VID_MASK) |
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eth_hlen += 4; |
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if (cm_node->ipv4) |
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packetsize = sizeof(*iph) + sizeof(*tcph); |
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else |
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packetsize = sizeof(*ip6h) + sizeof(*tcph); |
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packetsize += opts_len + hdr_len + pd_len; |
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memset(buf, 0x00, eth_hlen + packetsize); |
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sqbuf->totallen = packetsize + eth_hlen; |
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sqbuf->maclen = eth_hlen; |
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sqbuf->tcphlen = sizeof(*tcph) + opts_len; |
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sqbuf->scratch = (void *)cm_node; |
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ethh = (struct ethhdr *)buf; |
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buf += eth_hlen; |
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if (cm_node->ipv4) { |
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sqbuf->ipv4 = true; |
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iph = (struct iphdr *)buf; |
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buf += sizeof(*iph); |
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tcph = (struct tcphdr *)buf; |
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buf += sizeof(*tcph); |
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ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
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ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
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if (cm_node->vlan_id <= VLAN_VID_MASK) { |
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((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
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vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; |
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((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); |
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((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); |
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} else { |
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ethh->h_proto = htons(ETH_P_IP); |
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} |
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iph->version = IPVERSION; |
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iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ |
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iph->tos = cm_node->tos; |
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iph->tot_len = htons(packetsize); |
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iph->id = htons(++cm_node->tcp_cntxt.loc_id); |
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iph->frag_off = htons(0x4000); |
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iph->ttl = 0x40; |
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iph->protocol = IPPROTO_TCP; |
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iph->saddr = htonl(cm_node->loc_addr[0]); |
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iph->daddr = htonl(cm_node->rem_addr[0]); |
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} else { |
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sqbuf->ipv4 = false; |
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ip6h = (struct ipv6hdr *)buf; |
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buf += sizeof(*ip6h); |
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tcph = (struct tcphdr *)buf; |
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buf += sizeof(*tcph); |
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|
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ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
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ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
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if (cm_node->vlan_id <= VLAN_VID_MASK) { |
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((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
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vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id; |
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((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); |
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((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); |
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} else { |
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ethh->h_proto = htons(ETH_P_IPV6); |
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} |
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ip6h->version = 6; |
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ip6h->priority = cm_node->tos >> 4; |
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ip6h->flow_lbl[0] = cm_node->tos << 4; |
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ip6h->flow_lbl[1] = 0; |
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ip6h->flow_lbl[2] = 0; |
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ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); |
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ip6h->nexthdr = 6; |
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ip6h->hop_limit = 128; |
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i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, |
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cm_node->loc_addr); |
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i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, |
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cm_node->rem_addr); |
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} |
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|
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tcph->source = htons(cm_node->loc_port); |
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tcph->dest = htons(cm_node->rem_port); |
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|
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tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); |
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|
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if (flags & SET_ACK) { |
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cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; |
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tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); |
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tcph->ack = 1; |
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} else { |
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tcph->ack_seq = 0; |
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} |
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|
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if (flags & SET_SYN) { |
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cm_node->tcp_cntxt.loc_seq_num++; |
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tcph->syn = 1; |
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} else { |
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cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; |
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} |
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|
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if (flags & SET_FIN) { |
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cm_node->tcp_cntxt.loc_seq_num++; |
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tcph->fin = 1; |
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} |
|
|
|
if (flags & SET_RST) |
|
tcph->rst = 1; |
|
|
|
tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); |
|
sqbuf->tcphlen = tcph->doff << 2; |
|
tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); |
|
tcph->urg_ptr = 0; |
|
|
|
if (opts_len) { |
|
memcpy(buf, options->addr, opts_len); |
|
buf += opts_len; |
|
} |
|
|
|
if (hdr_len) { |
|
memcpy(buf, hdr->addr, hdr_len); |
|
buf += hdr_len; |
|
} |
|
|
|
if (pdata && pdata->addr) |
|
memcpy(buf, pdata->addr, pdata->size); |
|
|
|
atomic_set(&sqbuf->refcount, 1); |
|
|
|
return sqbuf; |
|
} |
|
|
|
/** |
|
* i40iw_send_reset - Send RST packet |
|
* @cm_node: connection's node |
|
*/ |
|
int i40iw_send_reset(struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
int flags = SET_RST | SET_ACK; |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); |
|
if (!sqbuf) { |
|
i40iw_pr_err("no sqbuf\n"); |
|
return -1; |
|
} |
|
|
|
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); |
|
} |
|
|
|
/** |
|
* i40iw_active_open_err - send event for active side cm error |
|
* @cm_node: connection's node |
|
* @reset: Flag to send reset or not |
|
*/ |
|
static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) |
|
{ |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->cm_core->stats_connect_errs++; |
|
if (reset) { |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"%s cm_node=%p state=%d\n", |
|
__func__, |
|
cm_node, |
|
cm_node->state); |
|
atomic_inc(&cm_node->ref_count); |
|
i40iw_send_reset(cm_node); |
|
} |
|
|
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
|
} |
|
|
|
/** |
|
* i40iw_passive_open_err - handle passive side cm error |
|
* @cm_node: connection's node |
|
* @reset: send reset or just free cm_node |
|
*/ |
|
static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) |
|
{ |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->cm_core->stats_passive_errs++; |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"%s cm_node=%p state =%d\n", |
|
__func__, |
|
cm_node, |
|
cm_node->state); |
|
if (reset) |
|
i40iw_send_reset(cm_node); |
|
else |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
|
|
/** |
|
* i40iw_event_connect_error - to create connect error event |
|
* @event: cm information for connect event |
|
*/ |
|
static void i40iw_event_connect_error(struct i40iw_cm_event *event) |
|
{ |
|
struct i40iw_qp *iwqp; |
|
struct iw_cm_id *cm_id; |
|
|
|
cm_id = event->cm_node->cm_id; |
|
if (!cm_id) |
|
return; |
|
|
|
iwqp = cm_id->provider_data; |
|
|
|
if (!iwqp || !iwqp->iwdev) |
|
return; |
|
|
|
iwqp->cm_id = NULL; |
|
cm_id->provider_data = NULL; |
|
i40iw_send_cm_event(event->cm_node, cm_id, |
|
IW_CM_EVENT_CONNECT_REPLY, |
|
-ECONNRESET); |
|
cm_id->rem_ref(cm_id); |
|
i40iw_rem_ref_cm_node(event->cm_node); |
|
} |
|
|
|
/** |
|
* i40iw_process_options |
|
* @cm_node: connection's node |
|
* @optionsloc: point to start of options |
|
* @optionsize: size of all options |
|
* @syn_packet: flag if syn packet |
|
*/ |
|
static int i40iw_process_options(struct i40iw_cm_node *cm_node, |
|
u8 *optionsloc, |
|
u32 optionsize, |
|
u32 syn_packet) |
|
{ |
|
u32 tmp; |
|
u32 offset = 0; |
|
union all_known_options *all_options; |
|
char got_mss_option = 0; |
|
|
|
while (offset < optionsize) { |
|
all_options = (union all_known_options *)(optionsloc + offset); |
|
switch (all_options->as_base.optionnum) { |
|
case OPTION_NUMBER_END: |
|
offset = optionsize; |
|
break; |
|
case OPTION_NUMBER_NONE: |
|
offset += 1; |
|
continue; |
|
case OPTION_NUMBER_MSS: |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"%s: MSS Length: %d Offset: %d Size: %d\n", |
|
__func__, |
|
all_options->as_mss.length, |
|
offset, |
|
optionsize); |
|
got_mss_option = 1; |
|
if (all_options->as_mss.length != 4) |
|
return -1; |
|
tmp = ntohs(all_options->as_mss.mss); |
|
if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) |
|
cm_node->tcp_cntxt.mss = tmp; |
|
break; |
|
case OPTION_NUMBER_WINDOW_SCALE: |
|
cm_node->tcp_cntxt.snd_wscale = |
|
all_options->as_windowscale.shiftcount; |
|
break; |
|
default: |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"TCP Option not understood: %x\n", |
|
all_options->as_base.optionnum); |
|
break; |
|
} |
|
offset += all_options->as_base.length; |
|
} |
|
if (!got_mss_option && syn_packet) |
|
cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; |
|
return 0; |
|
} |
|
|
|
/** |
|
* i40iw_handle_tcp_options - |
|
* @cm_node: connection's node |
|
* @tcph: pointer tcp header |
|
* @optionsize: size of options rcvd |
|
* @passive: active or passive flag |
|
*/ |
|
static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, |
|
struct tcphdr *tcph, |
|
int optionsize, |
|
int passive) |
|
{ |
|
u8 *optionsloc = (u8 *)&tcph[1]; |
|
|
|
if (optionsize) { |
|
if (i40iw_process_options(cm_node, |
|
optionsloc, |
|
optionsize, |
|
(u32)tcph->syn)) { |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"%s: Node %p, Sending RESET\n", |
|
__func__, |
|
cm_node); |
|
if (passive) |
|
i40iw_passive_open_err(cm_node, true); |
|
else |
|
i40iw_active_open_err(cm_node, true); |
|
return -1; |
|
} |
|
} |
|
|
|
cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << |
|
cm_node->tcp_cntxt.snd_wscale; |
|
|
|
if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
|
cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
|
return 0; |
|
} |
|
|
|
/** |
|
* i40iw_build_mpa_v1 - build a MPA V1 frame |
|
* @cm_node: connection's node |
|
* @start_addr: MPA frame start address |
|
* @mpa_key: to do read0 or write0 |
|
*/ |
|
static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, |
|
void *start_addr, |
|
u8 mpa_key) |
|
{ |
|
struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; |
|
|
|
switch (mpa_key) { |
|
case MPA_KEY_REQUEST: |
|
memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); |
|
break; |
|
case MPA_KEY_REPLY: |
|
memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); |
|
break; |
|
default: |
|
break; |
|
} |
|
mpa_frame->flags = IETF_MPA_FLAGS_CRC; |
|
mpa_frame->rev = cm_node->mpa_frame_rev; |
|
mpa_frame->priv_data_len = htons(cm_node->pdata.size); |
|
} |
|
|
|
/** |
|
* i40iw_build_mpa_v2 - build a MPA V2 frame |
|
* @cm_node: connection's node |
|
* @start_addr: buffer start address |
|
* @mpa_key: to do read0 or write0 |
|
*/ |
|
static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, |
|
void *start_addr, |
|
u8 mpa_key) |
|
{ |
|
struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; |
|
struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; |
|
u16 ctrl_ird, ctrl_ord; |
|
|
|
/* initialize the upper 5 bytes of the frame */ |
|
i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); |
|
mpa_frame->flags |= IETF_MPA_V2_FLAG; |
|
mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); |
|
|
|
/* initialize RTR msg */ |
|
if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { |
|
ctrl_ird = IETF_NO_IRD_ORD; |
|
ctrl_ord = IETF_NO_IRD_ORD; |
|
} else { |
|
ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? |
|
IETF_NO_IRD_ORD : cm_node->ird_size; |
|
ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? |
|
IETF_NO_IRD_ORD : cm_node->ord_size; |
|
} |
|
|
|
ctrl_ird |= IETF_PEER_TO_PEER; |
|
|
|
switch (mpa_key) { |
|
case MPA_KEY_REQUEST: |
|
ctrl_ord |= IETF_RDMA0_WRITE; |
|
ctrl_ord |= IETF_RDMA0_READ; |
|
break; |
|
case MPA_KEY_REPLY: |
|
switch (cm_node->send_rdma0_op) { |
|
case SEND_RDMA_WRITE_ZERO: |
|
ctrl_ord |= IETF_RDMA0_WRITE; |
|
break; |
|
case SEND_RDMA_READ_ZERO: |
|
ctrl_ord |= IETF_RDMA0_READ; |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
rtr_msg->ctrl_ird = htons(ctrl_ird); |
|
rtr_msg->ctrl_ord = htons(ctrl_ord); |
|
} |
|
|
|
/** |
|
* i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 |
|
* @cm_node: connection's node |
|
* @mpa: mpa: data buffer |
|
* @mpa_key: to do read0 or write0 |
|
*/ |
|
static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, |
|
struct i40iw_kmem_info *mpa, |
|
u8 mpa_key) |
|
{ |
|
int hdr_len = 0; |
|
|
|
switch (cm_node->mpa_frame_rev) { |
|
case IETF_MPA_V1: |
|
hdr_len = sizeof(struct ietf_mpa_v1); |
|
i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); |
|
break; |
|
case IETF_MPA_V2: |
|
hdr_len = sizeof(struct ietf_mpa_v2); |
|
i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return hdr_len; |
|
} |
|
|
|
/** |
|
* i40iw_send_mpa_request - active node send mpa request to passive node |
|
* @cm_node: connection's node |
|
*/ |
|
static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
|
|
if (!cm_node) { |
|
i40iw_pr_err("cm_node == NULL\n"); |
|
return -1; |
|
} |
|
|
|
cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
|
cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
|
&cm_node->mpa_hdr, |
|
MPA_KEY_REQUEST); |
|
if (!cm_node->mpa_hdr.size) { |
|
i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); |
|
return -1; |
|
} |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, |
|
NULL, |
|
&cm_node->mpa_hdr, |
|
&cm_node->pdata, |
|
SET_ACK); |
|
if (!sqbuf) { |
|
i40iw_pr_err("sq_buf == NULL\n"); |
|
return -1; |
|
} |
|
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
|
} |
|
|
|
/** |
|
* i40iw_send_mpa_reject - |
|
* @cm_node: connection's node |
|
* @pdata: reject data for connection |
|
* @plen: length of reject data |
|
*/ |
|
static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, |
|
const void *pdata, |
|
u8 plen) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
struct i40iw_kmem_info priv_info; |
|
|
|
cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
|
cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
|
&cm_node->mpa_hdr, |
|
MPA_KEY_REPLY); |
|
|
|
cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; |
|
priv_info.addr = (void *)pdata; |
|
priv_info.size = plen; |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, |
|
NULL, |
|
&cm_node->mpa_hdr, |
|
&priv_info, |
|
SET_ACK | SET_FIN); |
|
if (!sqbuf) { |
|
i40iw_pr_err("no sqbuf\n"); |
|
return -ENOMEM; |
|
} |
|
cm_node->state = I40IW_CM_STATE_FIN_WAIT1; |
|
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
|
} |
|
|
|
/** |
|
* 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 |
|
* @t: Timer instance to fetch the cm_core pointer from |
|
*/ |
|
static void i40iw_cm_timer_tick(struct timer_list *t) |
|
{ |
|
unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_timer_entry *send_entry, *close_entry; |
|
struct list_head *list_core_temp; |
|
struct i40iw_sc_vsi *vsi; |
|
struct list_head *list_node; |
|
struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); |
|
u32 settimer = 0; |
|
unsigned long timetosend; |
|
unsigned long flags; |
|
|
|
struct list_head timer_list; |
|
|
|
INIT_LIST_HEAD(&timer_list); |
|
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list); |
|
i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
list_for_each_safe(list_node, list_core_temp, &timer_list) { |
|
cm_node = container_of(list_node, |
|
struct i40iw_cm_node, |
|
timer_entry); |
|
close_entry = cm_node->close_entry; |
|
|
|
if (close_entry) { |
|
if (time_after(close_entry->timetosend, jiffies)) { |
|
if (nexttimeout > close_entry->timetosend || |
|
!settimer) { |
|
nexttimeout = close_entry->timetosend; |
|
settimer = 1; |
|
} |
|
} else { |
|
i40iw_handle_close_entry(cm_node, 1); |
|
} |
|
} |
|
|
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
|
|
|
send_entry = cm_node->send_entry; |
|
if (!send_entry) |
|
goto done; |
|
if (time_after(send_entry->timetosend, jiffies)) { |
|
if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { |
|
if ((nexttimeout > send_entry->timetosend) || |
|
!settimer) { |
|
nexttimeout = send_entry->timetosend; |
|
settimer = 1; |
|
} |
|
} else { |
|
i40iw_free_retrans_entry(cm_node); |
|
} |
|
goto done; |
|
} |
|
|
|
if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || |
|
(cm_node->state == I40IW_CM_STATE_CLOSED)) { |
|
i40iw_free_retrans_entry(cm_node); |
|
goto done; |
|
} |
|
|
|
if (!send_entry->retranscount || !send_entry->retrycount) { |
|
i40iw_free_retrans_entry(cm_node); |
|
|
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
|
i40iw_retrans_expired(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
|
goto done; |
|
} |
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
|
|
|
vsi = &cm_node->iwdev->vsi; |
|
|
|
if (!cm_node->ack_rcvd) { |
|
atomic_inc(&send_entry->sqbuf->refcount); |
|
i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); |
|
cm_node->cm_core->stats_pkt_retrans++; |
|
} |
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
|
if (send_entry->send_retrans) { |
|
send_entry->retranscount--; |
|
timetosend = (I40IW_RETRY_TIMEOUT << |
|
(I40IW_DEFAULT_RETRANS - |
|
send_entry->retranscount)); |
|
|
|
send_entry->timetosend = jiffies + |
|
min(timetosend, I40IW_MAX_TIMEOUT); |
|
if (nexttimeout > send_entry->timetosend || !settimer) { |
|
nexttimeout = send_entry->timetosend; |
|
settimer = 1; |
|
} |
|
} else { |
|
int close_when_complete; |
|
|
|
close_when_complete = send_entry->close_when_complete; |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"cm_node=%p state=%d\n", |
|
cm_node, |
|
cm_node->state); |
|
i40iw_free_retrans_entry(cm_node); |
|
if (close_when_complete) |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
done: |
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
|
|
if (settimer) { |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
if (!timer_pending(&cm_core->tcp_timer)) { |
|
cm_core->tcp_timer.expires = nexttimeout; |
|
add_timer(&cm_core->tcp_timer); |
|
} |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_send_syn - send SYN packet |
|
* @cm_node: connection's node |
|
* @sendack: flag to set ACK bit or not |
|
*/ |
|
int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
int flags = SET_SYN; |
|
char optionsbuffer[sizeof(struct option_mss) + |
|
sizeof(struct option_windowscale) + |
|
sizeof(struct option_base) + TCP_OPTIONS_PADDING]; |
|
struct i40iw_kmem_info opts; |
|
|
|
int optionssize = 0; |
|
/* Sending MSS option */ |
|
union all_known_options *options; |
|
|
|
opts.addr = optionsbuffer; |
|
if (!cm_node) { |
|
i40iw_pr_err("no cm_node\n"); |
|
return -EINVAL; |
|
} |
|
|
|
options = (union all_known_options *)&optionsbuffer[optionssize]; |
|
options->as_mss.optionnum = OPTION_NUMBER_MSS; |
|
options->as_mss.length = sizeof(struct option_mss); |
|
options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); |
|
optionssize += sizeof(struct option_mss); |
|
|
|
options = (union all_known_options *)&optionsbuffer[optionssize]; |
|
options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; |
|
options->as_windowscale.length = sizeof(struct option_windowscale); |
|
options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; |
|
optionssize += sizeof(struct option_windowscale); |
|
options = (union all_known_options *)&optionsbuffer[optionssize]; |
|
options->as_end = OPTION_NUMBER_END; |
|
optionssize += 1; |
|
|
|
if (sendack) |
|
flags |= SET_ACK; |
|
|
|
opts.size = optionssize; |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); |
|
if (!sqbuf) { |
|
i40iw_pr_err("no sqbuf\n"); |
|
return -1; |
|
} |
|
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
|
} |
|
|
|
/** |
|
* i40iw_send_ack - Send ACK packet |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_send_ack(struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi; |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); |
|
if (sqbuf) |
|
i40iw_puda_send_buf(vsi->ilq, sqbuf); |
|
else |
|
i40iw_pr_err("no sqbuf\n"); |
|
} |
|
|
|
/** |
|
* i40iw_send_fin - Send FIN pkt |
|
* @cm_node: connection's node |
|
*/ |
|
static int i40iw_send_fin(struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_puda_buf *sqbuf; |
|
|
|
sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); |
|
if (!sqbuf) { |
|
i40iw_pr_err("no sqbuf\n"); |
|
return -1; |
|
} |
|
return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
|
} |
|
|
|
/** |
|
* i40iw_find_node - find a cm node that matches the reference cm node |
|
* @cm_core: cm's core |
|
* @rem_port: remote tcp port num |
|
* @rem_addr: remote ip addr |
|
* @loc_port: local tcp port num |
|
* @loc_addr: loc ip addr |
|
* @add_refcnt: flag to increment refcount of cm_node |
|
* @accelerated_list: flag for accelerated vs non-accelerated list to search |
|
*/ |
|
struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, |
|
u16 rem_port, |
|
u32 *rem_addr, |
|
u16 loc_port, |
|
u32 *loc_addr, |
|
bool add_refcnt, |
|
bool accelerated_list) |
|
{ |
|
struct list_head *hte; |
|
struct i40iw_cm_node *cm_node; |
|
unsigned long flags; |
|
|
|
hte = accelerated_list ? |
|
&cm_core->accelerated_list : &cm_core->non_accelerated_list; |
|
|
|
/* walk list and find cm_node associated with this session ID */ |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_for_each_entry(cm_node, hte, list) { |
|
if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && |
|
(cm_node->loc_port == loc_port) && |
|
!memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) && |
|
(cm_node->rem_port == rem_port)) { |
|
if (add_refcnt) |
|
atomic_inc(&cm_node->ref_count); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
return cm_node; |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
/* no owner node */ |
|
return NULL; |
|
} |
|
|
|
/** |
|
* i40iw_find_listener - find a cm node listening on this addr-port pair |
|
* @cm_core: cm's core |
|
* @dst_port: listener tcp port num |
|
* @dst_addr: listener ip addr |
|
* @vlan_id: vlan id for the given address |
|
* @listener_state: state to match with listen node's |
|
*/ |
|
static struct i40iw_cm_listener *i40iw_find_listener( |
|
struct i40iw_cm_core *cm_core, |
|
u32 *dst_addr, |
|
u16 dst_port, |
|
u16 vlan_id, |
|
enum i40iw_cm_listener_state |
|
listener_state) |
|
{ |
|
struct i40iw_cm_listener *listen_node; |
|
static const u32 ip_zero[4] = { 0, 0, 0, 0 }; |
|
u32 listen_addr[4]; |
|
u16 listen_port; |
|
unsigned long flags; |
|
|
|
/* walk list and find cm_node associated with this session ID */ |
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
|
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
|
memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); |
|
listen_port = listen_node->loc_port; |
|
/* compare node pair, return node handle if a match */ |
|
if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || |
|
!memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && |
|
(listen_port == dst_port) && |
|
(listener_state & listen_node->listener_state)) { |
|
atomic_inc(&listen_node->ref_count); |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
return listen_node; |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
return NULL; |
|
} |
|
|
|
/** |
|
* i40iw_add_hte_node - add a cm node to the hash table |
|
* @cm_core: cm's core |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, |
|
struct i40iw_cm_node *cm_node) |
|
{ |
|
unsigned long flags; |
|
|
|
if (!cm_node || !cm_core) { |
|
i40iw_pr_err("cm_node or cm_core == NULL\n"); |
|
return; |
|
} |
|
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_add_tail(&cm_node->list, &cm_core->non_accelerated_list); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
} |
|
|
|
/** |
|
* i40iw_find_port - find port that matches reference port |
|
* @hte: ptr to accelerated or non-accelerated list |
|
* @port: port number to locate |
|
*/ |
|
static bool i40iw_find_port(struct list_head *hte, u16 port) |
|
{ |
|
struct i40iw_cm_node *cm_node; |
|
|
|
list_for_each_entry(cm_node, hte, list) { |
|
if (cm_node->loc_port == port) |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* i40iw_port_in_use - determine if port is in use |
|
* @cm_core: cm's core |
|
* @port: port number |
|
*/ |
|
bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port) |
|
{ |
|
struct i40iw_cm_listener *listen_node; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
if (i40iw_find_port(&cm_core->accelerated_list, port) || |
|
i40iw_find_port(&cm_core->non_accelerated_list, port)) { |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
return true; |
|
} |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
|
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
|
if (listen_node->loc_port == port) { |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
return true; |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
|
|
return false; |
|
} |
|
|
|
/** |
|
* i40iw_del_multiple_qhash - Remove qhash and child listens |
|
* @iwdev: iWarp device |
|
* @cm_info: CM info for parent listen node |
|
* @cm_parent_listen_node: The parent listen node |
|
*/ |
|
static enum i40iw_status_code i40iw_del_multiple_qhash( |
|
struct i40iw_device *iwdev, |
|
struct i40iw_cm_info *cm_info, |
|
struct i40iw_cm_listener *cm_parent_listen_node) |
|
{ |
|
struct i40iw_cm_listener *child_listen_node; |
|
enum i40iw_status_code ret = I40IW_ERR_CONFIG; |
|
struct list_head *pos, *tpos; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
|
list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { |
|
child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); |
|
if (child_listen_node->ipv4) |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"removing child listen for IP=%pI4, port=%d, vlan=%d\n", |
|
child_listen_node->loc_addr, |
|
child_listen_node->loc_port, |
|
child_listen_node->vlan_id); |
|
else |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, |
|
"removing child listen for IP=%pI6, port=%d, vlan=%d\n", |
|
child_listen_node->loc_addr, |
|
child_listen_node->loc_port, |
|
child_listen_node->vlan_id); |
|
list_del(pos); |
|
memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
|
sizeof(cm_info->loc_addr)); |
|
cm_info->vlan_id = child_listen_node->vlan_id; |
|
if (child_listen_node->qhash_set) { |
|
ret = i40iw_manage_qhash(iwdev, cm_info, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
I40IW_QHASH_MANAGE_TYPE_DELETE, |
|
NULL, false); |
|
child_listen_node->qhash_set = false; |
|
} else { |
|
ret = I40IW_SUCCESS; |
|
} |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"freed pointer = %p\n", |
|
child_listen_node); |
|
kfree(child_listen_node); |
|
cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; |
|
} |
|
spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan |
|
* @addr: local IPv6 address |
|
* @vlan_id: vlan id for the given IPv6 address |
|
* |
|
* Returns the net_device of the IPv6 address and also sets the |
|
* vlan id for that address. |
|
*/ |
|
static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id) |
|
{ |
|
struct net_device *ip_dev = NULL; |
|
struct in6_addr laddr6; |
|
|
|
if (!IS_ENABLED(CONFIG_IPV6)) |
|
return NULL; |
|
i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); |
|
if (vlan_id) |
|
*vlan_id = I40IW_NO_VLAN; |
|
rcu_read_lock(); |
|
for_each_netdev_rcu(&init_net, ip_dev) { |
|
if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { |
|
if (vlan_id) |
|
*vlan_id = rdma_vlan_dev_vlan_id(ip_dev); |
|
break; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
return ip_dev; |
|
} |
|
|
|
/** |
|
* i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address |
|
* @addr: local IPv4 address |
|
*/ |
|
static u16 i40iw_get_vlan_ipv4(u32 *addr) |
|
{ |
|
struct net_device *netdev; |
|
u16 vlan_id = I40IW_NO_VLAN; |
|
|
|
netdev = ip_dev_find(&init_net, htonl(addr[0])); |
|
if (netdev) { |
|
vlan_id = rdma_vlan_dev_vlan_id(netdev); |
|
dev_put(netdev); |
|
} |
|
return vlan_id; |
|
} |
|
|
|
/** |
|
* i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 |
|
* @iwdev: iWarp device |
|
* @cm_info: CM info for parent listen node |
|
* @cm_parent_listen_node: The parent listen node |
|
* |
|
* Adds a qhash and a child listen node for every IPv6 address |
|
* on the adapter and adds the associated qhash filter |
|
*/ |
|
static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, |
|
struct i40iw_cm_info *cm_info, |
|
struct i40iw_cm_listener *cm_parent_listen_node) |
|
{ |
|
struct net_device *ip_dev; |
|
struct inet6_dev *idev; |
|
struct inet6_ifaddr *ifp, *tmp; |
|
enum i40iw_status_code ret = 0; |
|
struct i40iw_cm_listener *child_listen_node; |
|
unsigned long flags; |
|
|
|
rtnl_lock(); |
|
for_each_netdev(&init_net, ip_dev) { |
|
if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && |
|
(rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || |
|
(ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { |
|
idev = __in6_dev_get(ip_dev); |
|
if (!idev) { |
|
i40iw_pr_err("idev == NULL\n"); |
|
break; |
|
} |
|
list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"IP=%pI6, vlan_id=%d, MAC=%pM\n", |
|
&ifp->addr, |
|
rdma_vlan_dev_vlan_id(ip_dev), |
|
ip_dev->dev_addr); |
|
child_listen_node = |
|
kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"Allocating child listener %p\n", |
|
child_listen_node); |
|
if (!child_listen_node) { |
|
ret = I40IW_ERR_NO_MEMORY; |
|
goto exit; |
|
} |
|
cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); |
|
cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
|
|
|
memcpy(child_listen_node, cm_parent_listen_node, |
|
sizeof(*child_listen_node)); |
|
|
|
i40iw_copy_ip_ntohl(child_listen_node->loc_addr, |
|
ifp->addr.in6_u.u6_addr32); |
|
memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
|
sizeof(cm_info->loc_addr)); |
|
|
|
ret = i40iw_manage_qhash(iwdev, cm_info, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
I40IW_QHASH_MANAGE_TYPE_ADD, |
|
NULL, true); |
|
if (!ret) { |
|
child_listen_node->qhash_set = true; |
|
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
|
list_add(&child_listen_node->child_listen_list, |
|
&cm_parent_listen_node->child_listen_list); |
|
spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
|
cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
|
} else { |
|
kfree(child_listen_node); |
|
} |
|
} |
|
} |
|
} |
|
exit: |
|
rtnl_unlock(); |
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 |
|
* @iwdev: iWarp device |
|
* @cm_info: CM info for parent listen node |
|
* @cm_parent_listen_node: The parent listen node |
|
* |
|
* Adds a qhash and a child listen node for every IPv4 address |
|
* on the adapter and adds the associated qhash filter |
|
*/ |
|
static enum i40iw_status_code i40iw_add_mqh_4( |
|
struct i40iw_device *iwdev, |
|
struct i40iw_cm_info *cm_info, |
|
struct i40iw_cm_listener *cm_parent_listen_node) |
|
{ |
|
struct net_device *dev; |
|
struct in_device *idev; |
|
struct i40iw_cm_listener *child_listen_node; |
|
enum i40iw_status_code ret = 0; |
|
unsigned long flags; |
|
|
|
rtnl_lock(); |
|
for_each_netdev(&init_net, dev) { |
|
if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && |
|
(rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || |
|
(dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { |
|
const struct in_ifaddr *ifa; |
|
|
|
idev = in_dev_get(dev); |
|
|
|
in_dev_for_each_ifa_rtnl(ifa, idev) { |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", |
|
&ifa->ifa_address, |
|
rdma_vlan_dev_vlan_id(dev), |
|
dev->dev_addr); |
|
child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); |
|
cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"Allocating child listener %p\n", |
|
child_listen_node); |
|
if (!child_listen_node) { |
|
in_dev_put(idev); |
|
ret = I40IW_ERR_NO_MEMORY; |
|
goto exit; |
|
} |
|
cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); |
|
cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
|
memcpy(child_listen_node, |
|
cm_parent_listen_node, |
|
sizeof(*child_listen_node)); |
|
|
|
child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); |
|
memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
|
sizeof(cm_info->loc_addr)); |
|
|
|
ret = i40iw_manage_qhash(iwdev, |
|
cm_info, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
I40IW_QHASH_MANAGE_TYPE_ADD, |
|
NULL, |
|
true); |
|
if (!ret) { |
|
child_listen_node->qhash_set = true; |
|
spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
|
list_add(&child_listen_node->child_listen_list, |
|
&cm_parent_listen_node->child_listen_list); |
|
spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
|
} else { |
|
kfree(child_listen_node); |
|
cm_parent_listen_node->cm_core->stats_listen_nodes_created--; |
|
} |
|
} |
|
|
|
in_dev_put(idev); |
|
} |
|
} |
|
exit: |
|
rtnl_unlock(); |
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_dec_refcnt_listen - delete listener and associated cm nodes |
|
* @cm_core: cm's core |
|
* @listener: passive connection's listener |
|
* @free_hanging_nodes: to free associated cm_nodes |
|
* @apbvt_del: flag to delete the apbvt |
|
*/ |
|
static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, |
|
struct i40iw_cm_listener *listener, |
|
int free_hanging_nodes, bool apbvt_del) |
|
{ |
|
int ret = -EINVAL; |
|
int err = 0; |
|
struct list_head *list_pos; |
|
struct list_head *list_temp; |
|
struct i40iw_cm_node *cm_node; |
|
struct list_head reset_list; |
|
struct i40iw_cm_info nfo; |
|
struct i40iw_cm_node *loopback; |
|
enum i40iw_cm_node_state old_state; |
|
unsigned long flags; |
|
|
|
/* free non-accelerated child nodes for this listener */ |
|
INIT_LIST_HEAD(&reset_list); |
|
if (free_hanging_nodes) { |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_for_each_safe(list_pos, |
|
list_temp, &cm_core->non_accelerated_list) { |
|
cm_node = container_of(list_pos, struct i40iw_cm_node, list); |
|
if ((cm_node->listener == listener) && |
|
!cm_node->accelerated) { |
|
atomic_inc(&cm_node->ref_count); |
|
list_add(&cm_node->reset_entry, &reset_list); |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
} |
|
|
|
list_for_each_safe(list_pos, list_temp, &reset_list) { |
|
cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); |
|
loopback = cm_node->loopbackpartner; |
|
if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} else { |
|
if (!loopback) { |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
err = i40iw_send_reset(cm_node); |
|
if (err) { |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_pr_err("send reset\n"); |
|
} else { |
|
old_state = cm_node->state; |
|
cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
|
if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
} else { |
|
struct i40iw_cm_event event; |
|
|
|
event.cm_node = loopback; |
|
memcpy(event.cm_info.rem_addr, |
|
loopback->rem_addr, sizeof(event.cm_info.rem_addr)); |
|
memcpy(event.cm_info.loc_addr, |
|
loopback->loc_addr, sizeof(event.cm_info.loc_addr)); |
|
event.cm_info.rem_port = loopback->rem_port; |
|
event.cm_info.loc_port = loopback->loc_port; |
|
event.cm_info.cm_id = loopback->cm_id; |
|
event.cm_info.ipv4 = loopback->ipv4; |
|
atomic_inc(&loopback->ref_count); |
|
loopback->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_event_connect_error(&event); |
|
cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
} |
|
} |
|
|
|
if (!atomic_dec_return(&listener->ref_count)) { |
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
|
list_del(&listener->list); |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
|
|
if (listener->iwdev) { |
|
if (apbvt_del) |
|
i40iw_manage_apbvt(listener->iwdev, |
|
listener->loc_port, |
|
I40IW_MANAGE_APBVT_DEL); |
|
|
|
memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); |
|
nfo.loc_port = listener->loc_port; |
|
nfo.ipv4 = listener->ipv4; |
|
nfo.vlan_id = listener->vlan_id; |
|
nfo.user_pri = listener->user_pri; |
|
|
|
if (!list_empty(&listener->child_listen_list)) { |
|
i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); |
|
} else { |
|
if (listener->qhash_set) |
|
i40iw_manage_qhash(listener->iwdev, |
|
&nfo, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
I40IW_QHASH_MANAGE_TYPE_DELETE, |
|
NULL, |
|
false); |
|
} |
|
} |
|
|
|
cm_core->stats_listen_destroyed++; |
|
kfree(listener); |
|
cm_core->stats_listen_nodes_destroyed++; |
|
listener = NULL; |
|
ret = 0; |
|
} |
|
|
|
if (listener) { |
|
if (atomic_read(&listener->pend_accepts_cnt) > 0) |
|
i40iw_debug(cm_core->dev, |
|
I40IW_DEBUG_CM, |
|
"%s: listener (%p) pending accepts=%u\n", |
|
__func__, |
|
listener, |
|
atomic_read(&listener->pend_accepts_cnt)); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_cm_del_listen - delete a linstener |
|
* @cm_core: cm's core |
|
* @listener: passive connection's listener |
|
* @apbvt_del: flag to delete apbvt |
|
*/ |
|
static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, |
|
struct i40iw_cm_listener *listener, |
|
bool apbvt_del) |
|
{ |
|
listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; |
|
listener->cm_id = NULL; /* going to be destroyed pretty soon */ |
|
return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); |
|
} |
|
|
|
/** |
|
* i40iw_addr_resolve_neigh - resolve neighbor address |
|
* @iwdev: iwarp device structure |
|
* @src_ip: local ip address |
|
* @dst_ip: remote ip address |
|
* @arpindex: if there is an arp entry |
|
*/ |
|
static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, |
|
u32 src_ip, |
|
u32 dst_ip, |
|
int arpindex) |
|
{ |
|
struct rtable *rt; |
|
struct neighbour *neigh; |
|
int rc = arpindex; |
|
__be32 dst_ipaddr = htonl(dst_ip); |
|
__be32 src_ipaddr = htonl(src_ip); |
|
|
|
rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); |
|
if (IS_ERR(rt)) { |
|
i40iw_pr_err("ip_route_output\n"); |
|
return rc; |
|
} |
|
|
|
neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); |
|
|
|
rcu_read_lock(); |
|
if (neigh) { |
|
if (neigh->nud_state & NUD_VALID) { |
|
if (arpindex >= 0) { |
|
if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, |
|
neigh->ha)) |
|
/* Mac address same as arp table */ |
|
goto resolve_neigh_exit; |
|
i40iw_manage_arp_cache(iwdev, |
|
iwdev->arp_table[arpindex].mac_addr, |
|
&dst_ip, |
|
true, |
|
I40IW_ARP_DELETE); |
|
} |
|
|
|
i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); |
|
rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); |
|
} else { |
|
neigh_event_send(neigh, NULL); |
|
} |
|
} |
|
resolve_neigh_exit: |
|
|
|
rcu_read_unlock(); |
|
if (neigh) |
|
neigh_release(neigh); |
|
|
|
ip_rt_put(rt); |
|
return rc; |
|
} |
|
|
|
/* |
|
* i40iw_get_dst_ipv6 |
|
*/ |
|
static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, |
|
struct sockaddr_in6 *dst_addr) |
|
{ |
|
struct dst_entry *dst; |
|
struct flowi6 fl6; |
|
|
|
memset(&fl6, 0, sizeof(fl6)); |
|
fl6.daddr = dst_addr->sin6_addr; |
|
fl6.saddr = src_addr->sin6_addr; |
|
if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) |
|
fl6.flowi6_oif = dst_addr->sin6_scope_id; |
|
|
|
dst = ip6_route_output(&init_net, NULL, &fl6); |
|
return dst; |
|
} |
|
|
|
/** |
|
* i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address |
|
* @iwdev: iwarp device structure |
|
* @src: source ip address |
|
* @dest: remote ip address |
|
* @arpindex: if there is an arp entry |
|
*/ |
|
static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, |
|
u32 *src, |
|
u32 *dest, |
|
int arpindex) |
|
{ |
|
struct neighbour *neigh; |
|
int rc = arpindex; |
|
struct dst_entry *dst; |
|
struct sockaddr_in6 dst_addr; |
|
struct sockaddr_in6 src_addr; |
|
|
|
memset(&dst_addr, 0, sizeof(dst_addr)); |
|
dst_addr.sin6_family = AF_INET6; |
|
i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); |
|
memset(&src_addr, 0, sizeof(src_addr)); |
|
src_addr.sin6_family = AF_INET6; |
|
i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); |
|
dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); |
|
if (!dst || dst->error) { |
|
if (dst) { |
|
i40iw_pr_err("ip6_route_output returned dst->error = %d\n", |
|
dst->error); |
|
dst_release(dst); |
|
} |
|
return rc; |
|
} |
|
|
|
neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); |
|
|
|
rcu_read_lock(); |
|
if (neigh) { |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); |
|
if (neigh->nud_state & NUD_VALID) { |
|
if (arpindex >= 0) { |
|
if (ether_addr_equal |
|
(iwdev->arp_table[arpindex].mac_addr, |
|
neigh->ha)) { |
|
/* Mac address same as in arp table */ |
|
goto resolve_neigh_exit6; |
|
} |
|
i40iw_manage_arp_cache(iwdev, |
|
iwdev->arp_table[arpindex].mac_addr, |
|
dest, |
|
false, |
|
I40IW_ARP_DELETE); |
|
} |
|
i40iw_manage_arp_cache(iwdev, |
|
neigh->ha, |
|
dest, |
|
false, |
|
I40IW_ARP_ADD); |
|
rc = i40iw_arp_table(iwdev, |
|
dest, |
|
false, |
|
NULL, |
|
I40IW_ARP_RESOLVE); |
|
} else { |
|
neigh_event_send(neigh, NULL); |
|
} |
|
} |
|
|
|
resolve_neigh_exit6: |
|
rcu_read_unlock(); |
|
if (neigh) |
|
neigh_release(neigh); |
|
dst_release(dst); |
|
return rc; |
|
} |
|
|
|
/** |
|
* i40iw_ipv4_is_loopback - check if loopback |
|
* @loc_addr: local addr to compare |
|
* @rem_addr: remote address |
|
*/ |
|
static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) |
|
{ |
|
return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); |
|
} |
|
|
|
/** |
|
* i40iw_ipv6_is_loopback - check if loopback |
|
* @loc_addr: local addr to compare |
|
* @rem_addr: remote address |
|
*/ |
|
static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) |
|
{ |
|
struct in6_addr raddr6; |
|
|
|
i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); |
|
return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); |
|
} |
|
|
|
/** |
|
* i40iw_make_cm_node - create a new instance of a cm node |
|
* @cm_core: cm's core |
|
* @iwdev: iwarp device structure |
|
* @cm_info: quad info for connection |
|
* @listener: passive connection's listener |
|
*/ |
|
static struct i40iw_cm_node *i40iw_make_cm_node( |
|
struct i40iw_cm_core *cm_core, |
|
struct i40iw_device *iwdev, |
|
struct i40iw_cm_info *cm_info, |
|
struct i40iw_cm_listener *listener) |
|
{ |
|
struct i40iw_cm_node *cm_node; |
|
int oldarpindex; |
|
int arpindex; |
|
struct net_device *netdev = iwdev->netdev; |
|
|
|
/* create an hte and cm_node for this instance */ |
|
cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); |
|
if (!cm_node) |
|
return NULL; |
|
|
|
/* set our node specific transport info */ |
|
cm_node->ipv4 = cm_info->ipv4; |
|
cm_node->vlan_id = cm_info->vlan_id; |
|
if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb) |
|
cm_node->vlan_id = 0; |
|
cm_node->tos = cm_info->tos; |
|
cm_node->user_pri = cm_info->user_pri; |
|
if (listener) { |
|
if (listener->tos != cm_info->tos) |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, |
|
"application TOS[%d] and remote client TOS[%d] mismatch\n", |
|
listener->tos, cm_info->tos); |
|
cm_node->tos = max(listener->tos, cm_info->tos); |
|
cm_node->user_pri = rt_tos2priority(cm_node->tos); |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n", |
|
cm_node->tos, cm_node->user_pri); |
|
} |
|
memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); |
|
memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); |
|
cm_node->loc_port = cm_info->loc_port; |
|
cm_node->rem_port = cm_info->rem_port; |
|
|
|
cm_node->mpa_frame_rev = iwdev->mpa_version; |
|
cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; |
|
cm_node->ird_size = I40IW_MAX_IRD_SIZE; |
|
cm_node->ord_size = I40IW_MAX_ORD_SIZE; |
|
|
|
cm_node->listener = listener; |
|
cm_node->cm_id = cm_info->cm_id; |
|
ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); |
|
spin_lock_init(&cm_node->retrans_list_lock); |
|
cm_node->ack_rcvd = false; |
|
|
|
atomic_set(&cm_node->ref_count, 1); |
|
/* associate our parent CM core */ |
|
cm_node->cm_core = cm_core; |
|
cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; |
|
cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
|
cm_node->tcp_cntxt.rcv_wnd = |
|
I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; |
|
if (cm_node->ipv4) { |
|
cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), |
|
htonl(cm_node->rem_addr[0]), |
|
htons(cm_node->loc_port), |
|
htons(cm_node->rem_port)); |
|
cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4; |
|
} else if (IS_ENABLED(CONFIG_IPV6)) { |
|
__be32 loc[4] = { |
|
htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), |
|
htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) |
|
}; |
|
__be32 rem[4] = { |
|
htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), |
|
htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) |
|
}; |
|
cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, |
|
htons(cm_node->loc_port), |
|
htons(cm_node->rem_port)); |
|
cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6; |
|
} |
|
|
|
cm_node->iwdev = iwdev; |
|
cm_node->dev = &iwdev->sc_dev; |
|
|
|
if ((cm_node->ipv4 && |
|
i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
|
(!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, |
|
cm_node->rem_addr))) { |
|
arpindex = i40iw_arp_table(iwdev, |
|
cm_node->rem_addr, |
|
false, |
|
NULL, |
|
I40IW_ARP_RESOLVE); |
|
} else { |
|
oldarpindex = i40iw_arp_table(iwdev, |
|
cm_node->rem_addr, |
|
false, |
|
NULL, |
|
I40IW_ARP_RESOLVE); |
|
if (cm_node->ipv4) |
|
arpindex = i40iw_addr_resolve_neigh(iwdev, |
|
cm_info->loc_addr[0], |
|
cm_info->rem_addr[0], |
|
oldarpindex); |
|
else if (IS_ENABLED(CONFIG_IPV6)) |
|
arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, |
|
cm_info->loc_addr, |
|
cm_info->rem_addr, |
|
oldarpindex); |
|
else |
|
arpindex = -EINVAL; |
|
} |
|
if (arpindex < 0) { |
|
i40iw_pr_err("cm_node arpindex\n"); |
|
kfree(cm_node); |
|
return NULL; |
|
} |
|
ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); |
|
i40iw_add_hte_node(cm_core, cm_node); |
|
cm_core->stats_nodes_created++; |
|
return cm_node; |
|
} |
|
|
|
/** |
|
* i40iw_rem_ref_cm_node - destroy an instance of a cm node |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_cm_core *cm_core = cm_node->cm_core; |
|
struct i40iw_qp *iwqp; |
|
struct i40iw_cm_info nfo; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); |
|
if (atomic_dec_return(&cm_node->ref_count)) { |
|
spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
|
return; |
|
} |
|
list_del(&cm_node->list); |
|
spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
|
|
|
/* if the node is destroyed before connection was accelerated */ |
|
if (!cm_node->accelerated && cm_node->accept_pend) { |
|
pr_err("node destroyed before established\n"); |
|
atomic_dec(&cm_node->listener->pend_accepts_cnt); |
|
} |
|
if (cm_node->close_entry) |
|
i40iw_handle_close_entry(cm_node, 0); |
|
if (cm_node->listener) { |
|
i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); |
|
} else { |
|
if (cm_node->apbvt_set) { |
|
i40iw_manage_apbvt(cm_node->iwdev, |
|
cm_node->loc_port, |
|
I40IW_MANAGE_APBVT_DEL); |
|
cm_node->apbvt_set = 0; |
|
} |
|
i40iw_get_addr_info(cm_node, &nfo); |
|
if (cm_node->qhash_set) { |
|
i40iw_manage_qhash(cm_node->iwdev, |
|
&nfo, |
|
I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
|
I40IW_QHASH_MANAGE_TYPE_DELETE, |
|
NULL, |
|
false); |
|
cm_node->qhash_set = 0; |
|
} |
|
} |
|
|
|
iwqp = cm_node->iwqp; |
|
if (iwqp) { |
|
iwqp->cm_node = NULL; |
|
i40iw_qp_rem_ref(&iwqp->ibqp); |
|
cm_node->iwqp = NULL; |
|
} else if (cm_node->qhash_set) { |
|
i40iw_get_addr_info(cm_node, &nfo); |
|
i40iw_manage_qhash(cm_node->iwdev, |
|
&nfo, |
|
I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
|
I40IW_QHASH_MANAGE_TYPE_DELETE, |
|
NULL, |
|
false); |
|
cm_node->qhash_set = 0; |
|
} |
|
|
|
cm_node->cm_core->stats_nodes_destroyed++; |
|
kfree(cm_node); |
|
} |
|
|
|
/** |
|
* i40iw_handle_fin_pkt - FIN packet received |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) |
|
{ |
|
u32 ret; |
|
|
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_RCVD: |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_MPAREJ_RCVD: |
|
cm_node->tcp_cntxt.rcv_nxt++; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_LAST_ACK; |
|
i40iw_send_fin(cm_node); |
|
break; |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
|
cm_node->tcp_cntxt.rcv_nxt++; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
atomic_inc(&cm_node->ref_count); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
cm_node->tcp_cntxt.rcv_nxt++; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSING; |
|
i40iw_send_ack(cm_node); |
|
/* |
|
* Wait for ACK as this is simultaneous close. |
|
* After we receive ACK, do not send anything. |
|
* Just rm the node. |
|
*/ |
|
break; |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
cm_node->tcp_cntxt.rcv_nxt++; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_TIME_WAIT; |
|
i40iw_send_ack(cm_node); |
|
ret = |
|
i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); |
|
if (ret) |
|
i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); |
|
break; |
|
case I40IW_CM_STATE_TIME_WAIT: |
|
cm_node->tcp_cntxt.rcv_nxt++; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_rem_ref_cm_node(cm_node); |
|
break; |
|
case I40IW_CM_STATE_OFFLOADED: |
|
default: |
|
i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_handle_rst_pkt - process received RST packet |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
switch (cm_node->mpa_frame_rev) { |
|
case IETF_MPA_V2: |
|
cm_node->mpa_frame_rev = IETF_MPA_V1; |
|
/* send a syn and goto syn sent state */ |
|
cm_node->state = I40IW_CM_STATE_SYN_SENT; |
|
if (i40iw_send_syn(cm_node, 0)) |
|
i40iw_active_open_err(cm_node, false); |
|
break; |
|
case IETF_MPA_V1: |
|
default: |
|
i40iw_active_open_err(cm_node, false); |
|
break; |
|
} |
|
break; |
|
case I40IW_CM_STATE_MPAREQ_RCVD: |
|
atomic_inc(&cm_node->passive_state); |
|
break; |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_SYN_RCVD: |
|
case I40IW_CM_STATE_LISTENING: |
|
i40iw_pr_err("Bad state state = %d\n", cm_node->state); |
|
i40iw_passive_open_err(cm_node, false); |
|
break; |
|
case I40IW_CM_STATE_OFFLOADED: |
|
i40iw_active_open_err(cm_node, false); |
|
break; |
|
case I40IW_CM_STATE_CLOSED: |
|
break; |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
case I40IW_CM_STATE_LAST_ACK: |
|
cm_node->cm_id->rem_ref(cm_node->cm_id); |
|
fallthrough; |
|
case I40IW_CM_STATE_TIME_WAIT: |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_rem_ref_cm_node(cm_node); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_handle_rcv_mpa - Process a recv'd mpa buffer |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
int ret; |
|
int datasize = rbuf->datalen; |
|
u8 *dataloc = rbuf->data; |
|
|
|
enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; |
|
u32 res_type; |
|
|
|
ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); |
|
if (ret) { |
|
if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) |
|
i40iw_active_open_err(cm_node, true); |
|
else |
|
i40iw_passive_open_err(cm_node, true); |
|
return; |
|
} |
|
|
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
if (res_type == I40IW_MPA_REQUEST_REJECT) |
|
i40iw_pr_err("state for reject\n"); |
|
cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; |
|
type = I40IW_CM_EVENT_MPA_REQ; |
|
i40iw_send_ack(cm_node); /* ACK received MPA request */ |
|
atomic_set(&cm_node->passive_state, |
|
I40IW_PASSIVE_STATE_INDICATED); |
|
break; |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
if (res_type == I40IW_MPA_REQUEST_REJECT) { |
|
type = I40IW_CM_EVENT_MPA_REJECT; |
|
cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; |
|
} else { |
|
type = I40IW_CM_EVENT_CONNECTED; |
|
cm_node->state = I40IW_CM_STATE_OFFLOADED; |
|
} |
|
i40iw_send_ack(cm_node); |
|
break; |
|
default: |
|
pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); |
|
break; |
|
} |
|
i40iw_create_event(cm_node, type); |
|
} |
|
|
|
/** |
|
* i40iw_indicate_pkt_err - Send up err event to cm |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) |
|
{ |
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
i40iw_active_open_err(cm_node, true); |
|
break; |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_SYN_RCVD: |
|
i40iw_passive_open_err(cm_node, true); |
|
break; |
|
case I40IW_CM_STATE_OFFLOADED: |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_check_syn - Check for error on received syn ack |
|
* @cm_node: connection's node |
|
* @tcph: pointer tcp header |
|
*/ |
|
static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
|
{ |
|
int err = 0; |
|
|
|
if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { |
|
err = 1; |
|
i40iw_active_open_err(cm_node, true); |
|
} |
|
return err; |
|
} |
|
|
|
/** |
|
* i40iw_check_seq - check seq numbers if OK |
|
* @cm_node: connection's node |
|
* @tcph: pointer tcp header |
|
*/ |
|
static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
|
{ |
|
int err = 0; |
|
u32 seq; |
|
u32 ack_seq; |
|
u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; |
|
u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; |
|
u32 rcv_wnd; |
|
|
|
seq = ntohl(tcph->seq); |
|
ack_seq = ntohl(tcph->ack_seq); |
|
rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; |
|
if (ack_seq != loc_seq_num) |
|
err = -1; |
|
else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) |
|
err = -1; |
|
if (err) { |
|
i40iw_pr_err("seq number\n"); |
|
i40iw_indicate_pkt_err(cm_node); |
|
} |
|
return err; |
|
} |
|
|
|
/** |
|
* i40iw_handle_syn_pkt - is for Passive node |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
|
int ret; |
|
u32 inc_sequence; |
|
int optionsize; |
|
struct i40iw_cm_info nfo; |
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
|
inc_sequence = ntohl(tcph->seq); |
|
|
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
/* Rcvd syn on active open connection */ |
|
i40iw_active_open_err(cm_node, 1); |
|
break; |
|
case I40IW_CM_STATE_LISTENING: |
|
/* Passive OPEN */ |
|
if (atomic_read(&cm_node->listener->pend_accepts_cnt) > |
|
cm_node->listener->backlog) { |
|
cm_node->cm_core->stats_backlog_drops++; |
|
i40iw_passive_open_err(cm_node, false); |
|
break; |
|
} |
|
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
|
if (ret) { |
|
i40iw_passive_open_err(cm_node, false); |
|
/* drop pkt */ |
|
break; |
|
} |
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
|
cm_node->accept_pend = 1; |
|
atomic_inc(&cm_node->listener->pend_accepts_cnt); |
|
|
|
cm_node->state = I40IW_CM_STATE_SYN_RCVD; |
|
i40iw_get_addr_info(cm_node, &nfo); |
|
ret = i40iw_manage_qhash(cm_node->iwdev, |
|
&nfo, |
|
I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
|
I40IW_QHASH_MANAGE_TYPE_ADD, |
|
(void *)cm_node, |
|
false); |
|
cm_node->qhash_set = true; |
|
break; |
|
case I40IW_CM_STATE_CLOSED: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
atomic_inc(&cm_node->ref_count); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_OFFLOADED: |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
case I40IW_CM_STATE_MPAREQ_RCVD: |
|
case I40IW_CM_STATE_LAST_ACK: |
|
case I40IW_CM_STATE_CLOSING: |
|
case I40IW_CM_STATE_UNKNOWN: |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
|
int ret; |
|
u32 inc_sequence; |
|
int optionsize; |
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
|
inc_sequence = ntohl(tcph->seq); |
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_SENT: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
/* active open */ |
|
if (i40iw_check_syn(cm_node, tcph)) { |
|
i40iw_pr_err("check syn fail\n"); |
|
return; |
|
} |
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
|
/* setup options */ |
|
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); |
|
if (ret) { |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"cm_node=%p tcp_options failed\n", |
|
cm_node); |
|
break; |
|
} |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
|
i40iw_send_ack(cm_node); /* ACK for the syn_ack */ |
|
ret = i40iw_send_mpa_request(cm_node); |
|
if (ret) { |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"cm_node=%p i40iw_send_mpa_request failed\n", |
|
cm_node); |
|
break; |
|
} |
|
cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; |
|
break; |
|
case I40IW_CM_STATE_MPAREQ_RCVD: |
|
i40iw_passive_open_err(cm_node, true); |
|
break; |
|
case I40IW_CM_STATE_LISTENING: |
|
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_CLOSED: |
|
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
atomic_inc(&cm_node->ref_count); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
case I40IW_CM_STATE_LAST_ACK: |
|
case I40IW_CM_STATE_OFFLOADED: |
|
case I40IW_CM_STATE_CLOSING: |
|
case I40IW_CM_STATE_UNKNOWN: |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_handle_ack_pkt - process packet with ACK |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
|
u32 inc_sequence; |
|
int ret = 0; |
|
int optionsize; |
|
u32 datasize = rbuf->datalen; |
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
|
|
|
if (i40iw_check_seq(cm_node, tcph)) |
|
return -EINVAL; |
|
|
|
inc_sequence = ntohl(tcph->seq); |
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_RCVD: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
|
if (ret) |
|
break; |
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
|
cm_node->state = I40IW_CM_STATE_ESTABLISHED; |
|
if (datasize) { |
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
|
i40iw_handle_rcv_mpa(cm_node, rbuf); |
|
} |
|
break; |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
if (datasize) { |
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
|
i40iw_handle_rcv_mpa(cm_node, rbuf); |
|
} |
|
break; |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
|
if (datasize) { |
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
|
cm_node->ack_rcvd = false; |
|
i40iw_handle_rcv_mpa(cm_node, rbuf); |
|
} else { |
|
cm_node->ack_rcvd = true; |
|
} |
|
break; |
|
case I40IW_CM_STATE_LISTENING: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_CLOSED: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
atomic_inc(&cm_node->ref_count); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_LAST_ACK: |
|
case I40IW_CM_STATE_CLOSING: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
if (!cm_node->accept_pend) |
|
cm_node->cm_id->rem_ref(cm_node->cm_id); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
break; |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
cm_node->state = I40IW_CM_STATE_FIN_WAIT2; |
|
break; |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
case I40IW_CM_STATE_OFFLOADED: |
|
case I40IW_CM_STATE_MPAREQ_RCVD: |
|
case I40IW_CM_STATE_UNKNOWN: |
|
default: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
break; |
|
} |
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_process_packet - process cm packet |
|
* @cm_node: connection's node |
|
* @rbuf: receive buffer |
|
*/ |
|
static void i40iw_process_packet(struct i40iw_cm_node *cm_node, |
|
struct i40iw_puda_buf *rbuf) |
|
{ |
|
enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; |
|
struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
|
u32 fin_set = 0; |
|
int ret; |
|
|
|
if (tcph->rst) { |
|
pkt_type = I40IW_PKT_TYPE_RST; |
|
} else if (tcph->syn) { |
|
pkt_type = I40IW_PKT_TYPE_SYN; |
|
if (tcph->ack) |
|
pkt_type = I40IW_PKT_TYPE_SYNACK; |
|
} else if (tcph->ack) { |
|
pkt_type = I40IW_PKT_TYPE_ACK; |
|
} |
|
if (tcph->fin) |
|
fin_set = 1; |
|
|
|
switch (pkt_type) { |
|
case I40IW_PKT_TYPE_SYN: |
|
i40iw_handle_syn_pkt(cm_node, rbuf); |
|
break; |
|
case I40IW_PKT_TYPE_SYNACK: |
|
i40iw_handle_synack_pkt(cm_node, rbuf); |
|
break; |
|
case I40IW_PKT_TYPE_ACK: |
|
ret = i40iw_handle_ack_pkt(cm_node, rbuf); |
|
if (fin_set && !ret) |
|
i40iw_handle_fin_pkt(cm_node); |
|
break; |
|
case I40IW_PKT_TYPE_RST: |
|
i40iw_handle_rst_pkt(cm_node, rbuf); |
|
break; |
|
default: |
|
if (fin_set && |
|
(!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) |
|
i40iw_handle_fin_pkt(cm_node); |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_make_listen_node - create a listen node with params |
|
* @cm_core: cm's core |
|
* @iwdev: iwarp device structure |
|
* @cm_info: quad info for connection |
|
*/ |
|
static struct i40iw_cm_listener *i40iw_make_listen_node( |
|
struct i40iw_cm_core *cm_core, |
|
struct i40iw_device *iwdev, |
|
struct i40iw_cm_info *cm_info) |
|
{ |
|
struct i40iw_cm_listener *listener; |
|
unsigned long flags; |
|
|
|
/* cannot have multiple matching listeners */ |
|
listener = i40iw_find_listener(cm_core, cm_info->loc_addr, |
|
cm_info->loc_port, |
|
cm_info->vlan_id, |
|
I40IW_CM_LISTENER_EITHER_STATE); |
|
if (listener && |
|
(listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { |
|
atomic_dec(&listener->ref_count); |
|
i40iw_debug(cm_core->dev, |
|
I40IW_DEBUG_CM, |
|
"Not creating listener since it already exists\n"); |
|
return NULL; |
|
} |
|
|
|
if (!listener) { |
|
/* create a CM listen node (1/2 node to compare incoming traffic to) */ |
|
listener = kzalloc(sizeof(*listener), GFP_KERNEL); |
|
if (!listener) |
|
return NULL; |
|
cm_core->stats_listen_nodes_created++; |
|
memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); |
|
listener->loc_port = cm_info->loc_port; |
|
|
|
INIT_LIST_HEAD(&listener->child_listen_list); |
|
|
|
atomic_set(&listener->ref_count, 1); |
|
} else { |
|
listener->reused_node = 1; |
|
} |
|
|
|
listener->cm_id = cm_info->cm_id; |
|
listener->ipv4 = cm_info->ipv4; |
|
listener->vlan_id = cm_info->vlan_id; |
|
atomic_set(&listener->pend_accepts_cnt, 0); |
|
listener->cm_core = cm_core; |
|
listener->iwdev = iwdev; |
|
|
|
listener->backlog = cm_info->backlog; |
|
listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; |
|
|
|
if (!listener->reused_node) { |
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
|
list_add(&listener->list, &cm_core->listen_nodes); |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
} |
|
|
|
return listener; |
|
} |
|
|
|
/** |
|
* i40iw_create_cm_node - make a connection node with params |
|
* @cm_core: cm's core |
|
* @iwdev: iwarp device structure |
|
* @conn_param: upper layer connection parameters |
|
* @cm_info: quad info for connection |
|
*/ |
|
static struct i40iw_cm_node *i40iw_create_cm_node( |
|
struct i40iw_cm_core *cm_core, |
|
struct i40iw_device *iwdev, |
|
struct iw_cm_conn_param *conn_param, |
|
struct i40iw_cm_info *cm_info) |
|
{ |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_cm_listener *loopback_remotelistener; |
|
struct i40iw_cm_node *loopback_remotenode; |
|
struct i40iw_cm_info loopback_cm_info; |
|
|
|
u16 private_data_len = conn_param->private_data_len; |
|
const void *private_data = conn_param->private_data; |
|
|
|
/* create a CM connection node */ |
|
cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); |
|
if (!cm_node) |
|
return ERR_PTR(-ENOMEM); |
|
/* set our node side to client (active) side */ |
|
cm_node->tcp_cntxt.client = 1; |
|
cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
|
|
|
i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); |
|
|
|
if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { |
|
loopback_remotelistener = i40iw_find_listener( |
|
cm_core, |
|
cm_info->rem_addr, |
|
cm_node->rem_port, |
|
cm_node->vlan_id, |
|
I40IW_CM_LISTENER_ACTIVE_STATE); |
|
if (!loopback_remotelistener) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return ERR_PTR(-ECONNREFUSED); |
|
} else { |
|
loopback_cm_info = *cm_info; |
|
loopback_cm_info.loc_port = cm_info->rem_port; |
|
loopback_cm_info.rem_port = cm_info->loc_port; |
|
loopback_cm_info.cm_id = loopback_remotelistener->cm_id; |
|
loopback_cm_info.ipv4 = cm_info->ipv4; |
|
loopback_remotenode = i40iw_make_cm_node(cm_core, |
|
iwdev, |
|
&loopback_cm_info, |
|
loopback_remotelistener); |
|
if (!loopback_remotenode) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
cm_core->stats_loopbacks++; |
|
loopback_remotenode->loopbackpartner = cm_node; |
|
loopback_remotenode->tcp_cntxt.rcv_wscale = |
|
I40IW_CM_DEFAULT_RCV_WND_SCALE; |
|
cm_node->loopbackpartner = loopback_remotenode; |
|
memcpy(loopback_remotenode->pdata_buf, private_data, |
|
private_data_len); |
|
loopback_remotenode->pdata.size = private_data_len; |
|
|
|
if (loopback_remotenode->ord_size > cm_node->ird_size) |
|
loopback_remotenode->ord_size = |
|
cm_node->ird_size; |
|
|
|
cm_node->state = I40IW_CM_STATE_OFFLOADED; |
|
cm_node->tcp_cntxt.rcv_nxt = |
|
loopback_remotenode->tcp_cntxt.loc_seq_num; |
|
loopback_remotenode->tcp_cntxt.rcv_nxt = |
|
cm_node->tcp_cntxt.loc_seq_num; |
|
cm_node->tcp_cntxt.max_snd_wnd = |
|
loopback_remotenode->tcp_cntxt.rcv_wnd; |
|
loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
|
cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; |
|
loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
|
cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; |
|
loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; |
|
} |
|
return cm_node; |
|
} |
|
|
|
cm_node->pdata.size = private_data_len; |
|
cm_node->pdata.addr = cm_node->pdata_buf; |
|
|
|
memcpy(cm_node->pdata_buf, private_data, private_data_len); |
|
|
|
cm_node->state = I40IW_CM_STATE_SYN_SENT; |
|
return cm_node; |
|
} |
|
|
|
/** |
|
* i40iw_cm_reject - reject and teardown a connection |
|
* @cm_node: connection's node |
|
* @pdata: ptr to private data for reject |
|
* @plen: size of private data |
|
*/ |
|
static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) |
|
{ |
|
int ret = 0; |
|
int err; |
|
int passive_state; |
|
struct iw_cm_id *cm_id = cm_node->cm_id; |
|
struct i40iw_cm_node *loopback = cm_node->loopbackpartner; |
|
|
|
if (cm_node->tcp_cntxt.client) |
|
return ret; |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
|
|
if (!loopback) { |
|
passive_state = atomic_inc_return(&cm_node->passive_state); |
|
if (passive_state == I40IW_SEND_RESET_EVENT) { |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} else { |
|
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} else { |
|
ret = i40iw_send_mpa_reject(cm_node, pdata, plen); |
|
if (ret) { |
|
cm_node->state = I40IW_CM_STATE_CLOSED; |
|
err = i40iw_send_reset(cm_node); |
|
if (err) |
|
i40iw_pr_err("send reset failed\n"); |
|
} else { |
|
cm_id->add_ref(cm_id); |
|
} |
|
} |
|
} |
|
} else { |
|
cm_node->cm_id = NULL; |
|
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
i40iw_rem_ref_cm_node(loopback); |
|
} else { |
|
ret = i40iw_send_cm_event(loopback, |
|
loopback->cm_id, |
|
IW_CM_EVENT_CONNECT_REPLY, |
|
-ECONNREFUSED); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
loopback->state = I40IW_CM_STATE_CLOSING; |
|
|
|
cm_id = loopback->cm_id; |
|
i40iw_rem_ref_cm_node(loopback); |
|
cm_id->rem_ref(cm_id); |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_cm_close - close of cm connection |
|
* @cm_node: connection's node |
|
*/ |
|
static int i40iw_cm_close(struct i40iw_cm_node *cm_node) |
|
{ |
|
int ret = 0; |
|
|
|
if (!cm_node) |
|
return -EINVAL; |
|
|
|
switch (cm_node->state) { |
|
case I40IW_CM_STATE_SYN_RCVD: |
|
case I40IW_CM_STATE_SYN_SENT: |
|
case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: |
|
case I40IW_CM_STATE_ESTABLISHED: |
|
case I40IW_CM_STATE_ACCEPTING: |
|
case I40IW_CM_STATE_MPAREQ_SENT: |
|
case I40IW_CM_STATE_MPAREQ_RCVD: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_CLOSE_WAIT: |
|
cm_node->state = I40IW_CM_STATE_LAST_ACK; |
|
i40iw_send_fin(cm_node); |
|
break; |
|
case I40IW_CM_STATE_FIN_WAIT1: |
|
case I40IW_CM_STATE_FIN_WAIT2: |
|
case I40IW_CM_STATE_LAST_ACK: |
|
case I40IW_CM_STATE_TIME_WAIT: |
|
case I40IW_CM_STATE_CLOSING: |
|
ret = -1; |
|
break; |
|
case I40IW_CM_STATE_LISTENING: |
|
i40iw_cleanup_retrans_entry(cm_node); |
|
i40iw_send_reset(cm_node); |
|
break; |
|
case I40IW_CM_STATE_MPAREJ_RCVD: |
|
case I40IW_CM_STATE_UNKNOWN: |
|
case I40IW_CM_STATE_INITED: |
|
case I40IW_CM_STATE_CLOSED: |
|
case I40IW_CM_STATE_LISTENER_DESTROYED: |
|
i40iw_rem_ref_cm_node(cm_node); |
|
break; |
|
case I40IW_CM_STATE_OFFLOADED: |
|
if (cm_node->send_entry) |
|
i40iw_pr_err("send_entry\n"); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
break; |
|
} |
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_receive_ilq - recv an ETHERNET packet, and process it |
|
* through CM |
|
* @vsi: pointer to the vsi structure |
|
* @rbuf: receive buffer |
|
*/ |
|
void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf) |
|
{ |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_cm_listener *listener; |
|
struct iphdr *iph; |
|
struct ipv6hdr *ip6h; |
|
struct tcphdr *tcph; |
|
struct i40iw_cm_info cm_info; |
|
struct i40iw_sc_dev *dev = vsi->dev; |
|
struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; |
|
struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
|
struct vlan_ethhdr *ethh; |
|
u16 vtag; |
|
|
|
/* if vlan, then maclen = 18 else 14 */ |
|
iph = (struct iphdr *)rbuf->iph; |
|
memset(&cm_info, 0, sizeof(cm_info)); |
|
|
|
i40iw_debug_buf(dev, |
|
I40IW_DEBUG_ILQ, |
|
"RECEIVE ILQ BUFFER", |
|
rbuf->mem.va, |
|
rbuf->totallen); |
|
ethh = (struct vlan_ethhdr *)rbuf->mem.va; |
|
|
|
if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { |
|
vtag = ntohs(ethh->h_vlan_TCI); |
|
cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; |
|
cm_info.vlan_id = vtag & VLAN_VID_MASK; |
|
i40iw_debug(cm_core->dev, |
|
I40IW_DEBUG_CM, |
|
"%s vlan_id=%d\n", |
|
__func__, |
|
cm_info.vlan_id); |
|
} else { |
|
cm_info.vlan_id = I40IW_NO_VLAN; |
|
} |
|
tcph = (struct tcphdr *)rbuf->tcph; |
|
|
|
if (rbuf->ipv4) { |
|
cm_info.loc_addr[0] = ntohl(iph->daddr); |
|
cm_info.rem_addr[0] = ntohl(iph->saddr); |
|
cm_info.ipv4 = true; |
|
cm_info.tos = iph->tos; |
|
} else { |
|
ip6h = (struct ipv6hdr *)rbuf->iph; |
|
i40iw_copy_ip_ntohl(cm_info.loc_addr, |
|
ip6h->daddr.in6_u.u6_addr32); |
|
i40iw_copy_ip_ntohl(cm_info.rem_addr, |
|
ip6h->saddr.in6_u.u6_addr32); |
|
cm_info.ipv4 = false; |
|
cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); |
|
} |
|
cm_info.loc_port = ntohs(tcph->dest); |
|
cm_info.rem_port = ntohs(tcph->source); |
|
cm_node = i40iw_find_node(cm_core, |
|
cm_info.rem_port, |
|
cm_info.rem_addr, |
|
cm_info.loc_port, |
|
cm_info.loc_addr, |
|
true, |
|
false); |
|
|
|
if (!cm_node) { |
|
/* Only type of packet accepted are for */ |
|
/* the PASSIVE open (syn only) */ |
|
if (!tcph->syn || tcph->ack) |
|
return; |
|
listener = |
|
i40iw_find_listener(cm_core, |
|
cm_info.loc_addr, |
|
cm_info.loc_port, |
|
cm_info.vlan_id, |
|
I40IW_CM_LISTENER_ACTIVE_STATE); |
|
if (!listener) { |
|
cm_info.cm_id = NULL; |
|
i40iw_debug(cm_core->dev, |
|
I40IW_DEBUG_CM, |
|
"%s no listener found\n", |
|
__func__); |
|
return; |
|
} |
|
cm_info.cm_id = listener->cm_id; |
|
cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); |
|
if (!cm_node) { |
|
i40iw_debug(cm_core->dev, |
|
I40IW_DEBUG_CM, |
|
"%s allocate node failed\n", |
|
__func__); |
|
atomic_dec(&listener->ref_count); |
|
return; |
|
} |
|
if (!tcph->rst && !tcph->fin) { |
|
cm_node->state = I40IW_CM_STATE_LISTENING; |
|
} else { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return; |
|
} |
|
atomic_inc(&cm_node->ref_count); |
|
} else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return; |
|
} |
|
i40iw_process_packet(cm_node, rbuf); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
|
|
/** |
|
* i40iw_setup_cm_core - allocate a top level instance of a cm |
|
* core |
|
* @iwdev: iwarp device structure |
|
*/ |
|
int i40iw_setup_cm_core(struct i40iw_device *iwdev) |
|
{ |
|
struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
|
|
|
cm_core->iwdev = iwdev; |
|
cm_core->dev = &iwdev->sc_dev; |
|
|
|
INIT_LIST_HEAD(&cm_core->accelerated_list); |
|
INIT_LIST_HEAD(&cm_core->non_accelerated_list); |
|
INIT_LIST_HEAD(&cm_core->listen_nodes); |
|
|
|
timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0); |
|
|
|
spin_lock_init(&cm_core->ht_lock); |
|
spin_lock_init(&cm_core->listen_list_lock); |
|
spin_lock_init(&cm_core->apbvt_lock); |
|
|
|
cm_core->event_wq = alloc_ordered_workqueue("iwewq", |
|
WQ_MEM_RECLAIM); |
|
if (!cm_core->event_wq) |
|
goto error; |
|
|
|
cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq", |
|
WQ_MEM_RECLAIM); |
|
if (!cm_core->disconn_wq) |
|
goto error; |
|
|
|
return 0; |
|
error: |
|
i40iw_cleanup_cm_core(&iwdev->cm_core); |
|
|
|
return -ENOMEM; |
|
} |
|
|
|
/** |
|
* i40iw_cleanup_cm_core - deallocate a top level instance of a |
|
* cm core |
|
* @cm_core: cm's core |
|
*/ |
|
void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) |
|
{ |
|
unsigned long flags; |
|
|
|
if (!cm_core) |
|
return; |
|
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
if (timer_pending(&cm_core->tcp_timer)) |
|
del_timer_sync(&cm_core->tcp_timer); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
if (cm_core->event_wq) |
|
destroy_workqueue(cm_core->event_wq); |
|
if (cm_core->disconn_wq) |
|
destroy_workqueue(cm_core->disconn_wq); |
|
} |
|
|
|
/** |
|
* i40iw_init_tcp_ctx - setup qp context |
|
* @cm_node: connection's node |
|
* @tcp_info: offload info for tcp |
|
* @iwqp: associate qp for the connection |
|
*/ |
|
static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, |
|
struct i40iw_tcp_offload_info *tcp_info, |
|
struct i40iw_qp *iwqp) |
|
{ |
|
tcp_info->ipv4 = cm_node->ipv4; |
|
tcp_info->drop_ooo_seg = true; |
|
tcp_info->wscale = true; |
|
tcp_info->ignore_tcp_opt = true; |
|
tcp_info->ignore_tcp_uns_opt = true; |
|
tcp_info->no_nagle = false; |
|
|
|
tcp_info->ttl = I40IW_DEFAULT_TTL; |
|
tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); |
|
tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); |
|
tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; |
|
|
|
tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
|
tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; |
|
tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; |
|
|
|
tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
|
tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); |
|
tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
|
tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
|
|
|
tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
|
tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); |
|
tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
|
tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
|
tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); |
|
tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << |
|
cm_node->tcp_cntxt.rcv_wscale); |
|
|
|
tcp_info->flow_label = 0; |
|
tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); |
|
if (cm_node->vlan_id <= VLAN_VID_MASK) { |
|
tcp_info->insert_vlan_tag = true; |
|
tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) | |
|
cm_node->vlan_id); |
|
} |
|
if (cm_node->ipv4) { |
|
tcp_info->src_port = cpu_to_le16(cm_node->loc_port); |
|
tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); |
|
|
|
tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]); |
|
tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]); |
|
tcp_info->arp_idx = |
|
cpu_to_le16((u16)i40iw_arp_table( |
|
iwqp->iwdev, |
|
&tcp_info->dest_ip_addr3, |
|
true, |
|
NULL, |
|
I40IW_ARP_RESOLVE)); |
|
} else { |
|
tcp_info->src_port = cpu_to_le16(cm_node->loc_port); |
|
tcp_info->dst_port = cpu_to_le16(cm_node->rem_port); |
|
tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]); |
|
tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]); |
|
tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]); |
|
tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]); |
|
tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]); |
|
tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]); |
|
tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]); |
|
tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]); |
|
tcp_info->arp_idx = |
|
cpu_to_le16((u16)i40iw_arp_table( |
|
iwqp->iwdev, |
|
&tcp_info->dest_ip_addr0, |
|
false, |
|
NULL, |
|
I40IW_ARP_RESOLVE)); |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_cm_init_tsa_conn - setup qp for RTS |
|
* @iwqp: associate qp for the connection |
|
* @cm_node: connection's node |
|
*/ |
|
static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, |
|
struct i40iw_cm_node *cm_node) |
|
{ |
|
struct i40iw_tcp_offload_info tcp_info; |
|
struct i40iwarp_offload_info *iwarp_info; |
|
struct i40iw_qp_host_ctx_info *ctx_info; |
|
struct i40iw_device *iwdev = iwqp->iwdev; |
|
struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; |
|
|
|
memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); |
|
iwarp_info = &iwqp->iwarp_info; |
|
ctx_info = &iwqp->ctx_info; |
|
|
|
ctx_info->tcp_info = &tcp_info; |
|
ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; |
|
ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; |
|
|
|
iwarp_info->ord_size = cm_node->ord_size; |
|
iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); |
|
|
|
if (iwarp_info->ord_size == 1) |
|
iwarp_info->ord_size = 2; |
|
|
|
iwarp_info->rd_enable = true; |
|
iwarp_info->rdmap_ver = 1; |
|
iwarp_info->ddp_ver = 1; |
|
|
|
iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; |
|
|
|
ctx_info->tcp_info_valid = true; |
|
ctx_info->iwarp_info_valid = true; |
|
ctx_info->add_to_qoslist = true; |
|
ctx_info->user_pri = cm_node->user_pri; |
|
|
|
i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); |
|
if (cm_node->snd_mark_en) { |
|
iwarp_info->snd_mark_en = true; |
|
iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & |
|
SNDMARKER_SEQNMASK) + cm_node->lsmm_size; |
|
} |
|
|
|
cm_node->state = I40IW_CM_STATE_OFFLOADED; |
|
tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
|
tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; |
|
tcp_info.tos = cm_node->tos; |
|
|
|
dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); |
|
|
|
/* once tcp_info is set, no need to do it again */ |
|
ctx_info->tcp_info_valid = false; |
|
ctx_info->iwarp_info_valid = false; |
|
ctx_info->add_to_qoslist = false; |
|
} |
|
|
|
/** |
|
* i40iw_cm_disconn - when a connection is being closed |
|
* @iwqp: associate qp for the connection |
|
*/ |
|
void i40iw_cm_disconn(struct i40iw_qp *iwqp) |
|
{ |
|
struct disconn_work *work; |
|
struct i40iw_device *iwdev = iwqp->iwdev; |
|
struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
|
unsigned long flags; |
|
|
|
work = kzalloc(sizeof(*work), GFP_ATOMIC); |
|
if (!work) |
|
return; /* Timer will clean up */ |
|
|
|
spin_lock_irqsave(&iwdev->qptable_lock, flags); |
|
if (!iwdev->qp_table[iwqp->ibqp.qp_num]) { |
|
spin_unlock_irqrestore(&iwdev->qptable_lock, flags); |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, |
|
"%s qp_id %d is already freed\n", |
|
__func__, iwqp->ibqp.qp_num); |
|
kfree(work); |
|
return; |
|
} |
|
i40iw_qp_add_ref(&iwqp->ibqp); |
|
spin_unlock_irqrestore(&iwdev->qptable_lock, flags); |
|
|
|
work->iwqp = iwqp; |
|
INIT_WORK(&work->work, i40iw_disconnect_worker); |
|
queue_work(cm_core->disconn_wq, &work->work); |
|
return; |
|
} |
|
|
|
/** |
|
* i40iw_qp_disconnect - free qp and close cm |
|
* @iwqp: associate qp for the connection |
|
*/ |
|
static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) |
|
{ |
|
struct i40iw_device *iwdev; |
|
struct i40iw_ib_device *iwibdev; |
|
|
|
iwdev = to_iwdev(iwqp->ibqp.device); |
|
if (!iwdev) { |
|
i40iw_pr_err("iwdev == NULL\n"); |
|
return; |
|
} |
|
|
|
iwibdev = iwdev->iwibdev; |
|
|
|
if (iwqp->active_conn) { |
|
/* indicate this connection is NOT active */ |
|
iwqp->active_conn = 0; |
|
} else { |
|
/* Need to free the Last Streaming Mode Message */ |
|
if (iwqp->ietf_mem.va) { |
|
if (iwqp->lsmm_mr) |
|
iwibdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, |
|
NULL); |
|
i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); |
|
} |
|
} |
|
|
|
/* close the CM node down if it is still active */ |
|
if (iwqp->cm_node) { |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); |
|
i40iw_cm_close(iwqp->cm_node); |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_cm_disconn_true - called by worker thread to disconnect qp |
|
* @iwqp: associate qp for the connection |
|
*/ |
|
static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) |
|
{ |
|
struct iw_cm_id *cm_id; |
|
struct i40iw_device *iwdev; |
|
struct i40iw_sc_qp *qp = &iwqp->sc_qp; |
|
u16 last_ae; |
|
u8 original_hw_tcp_state; |
|
u8 original_ibqp_state; |
|
int disconn_status = 0; |
|
int issue_disconn = 0; |
|
int issue_close = 0; |
|
int issue_flush = 0; |
|
struct ib_event ibevent; |
|
unsigned long flags; |
|
int ret; |
|
|
|
if (!iwqp) { |
|
i40iw_pr_err("iwqp == NULL\n"); |
|
return; |
|
} |
|
|
|
spin_lock_irqsave(&iwqp->lock, flags); |
|
cm_id = iwqp->cm_id; |
|
/* make sure we havent already closed this connection */ |
|
if (!cm_id) { |
|
spin_unlock_irqrestore(&iwqp->lock, flags); |
|
return; |
|
} |
|
|
|
iwdev = to_iwdev(iwqp->ibqp.device); |
|
|
|
original_hw_tcp_state = iwqp->hw_tcp_state; |
|
original_ibqp_state = iwqp->ibqp_state; |
|
last_ae = iwqp->last_aeq; |
|
|
|
if (qp->term_flags) { |
|
issue_disconn = 1; |
|
issue_close = 1; |
|
iwqp->cm_id = NULL; |
|
/*When term timer expires after cm_timer, don't want |
|
*terminate-handler to issue cm_disconn which can re-free |
|
*a QP even after its refcnt=0. |
|
*/ |
|
i40iw_terminate_del_timer(qp); |
|
if (!iwqp->flush_issued) { |
|
iwqp->flush_issued = 1; |
|
issue_flush = 1; |
|
} |
|
} else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || |
|
((original_ibqp_state == IB_QPS_RTS) && |
|
(last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { |
|
issue_disconn = 1; |
|
if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) |
|
disconn_status = -ECONNRESET; |
|
} |
|
|
|
if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || |
|
(original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || |
|
(last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || |
|
(last_ae == I40IW_AE_LLP_CONNECTION_RESET) || |
|
iwdev->reset)) { |
|
issue_close = 1; |
|
iwqp->cm_id = NULL; |
|
if (!iwqp->flush_issued) { |
|
iwqp->flush_issued = 1; |
|
issue_flush = 1; |
|
} |
|
} |
|
|
|
spin_unlock_irqrestore(&iwqp->lock, flags); |
|
if (issue_flush && !iwqp->destroyed) { |
|
/* Flush the queues */ |
|
i40iw_flush_wqes(iwdev, iwqp); |
|
|
|
if (qp->term_flags && iwqp->ibqp.event_handler) { |
|
ibevent.device = iwqp->ibqp.device; |
|
ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? |
|
IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; |
|
ibevent.element.qp = &iwqp->ibqp; |
|
iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); |
|
} |
|
} |
|
|
|
if (cm_id && cm_id->event_handler) { |
|
if (issue_disconn) { |
|
ret = i40iw_send_cm_event(NULL, |
|
cm_id, |
|
IW_CM_EVENT_DISCONNECT, |
|
disconn_status); |
|
|
|
if (ret) |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"disconnect event failed %s: - cm_id = %p\n", |
|
__func__, cm_id); |
|
} |
|
if (issue_close) { |
|
i40iw_qp_disconnect(iwqp); |
|
cm_id->provider_data = iwqp; |
|
ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); |
|
if (ret) |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"close event failed %s: - cm_id = %p\n", |
|
__func__, cm_id); |
|
cm_id->rem_ref(cm_id); |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_disconnect_worker - worker for connection close |
|
* @work: points or disconn structure |
|
*/ |
|
static void i40iw_disconnect_worker(struct work_struct *work) |
|
{ |
|
struct disconn_work *dwork = container_of(work, struct disconn_work, work); |
|
struct i40iw_qp *iwqp = dwork->iwqp; |
|
|
|
kfree(dwork); |
|
i40iw_cm_disconn_true(iwqp); |
|
i40iw_qp_rem_ref(&iwqp->ibqp); |
|
} |
|
|
|
/** |
|
* i40iw_accept - registered call for connection to be accepted |
|
* @cm_id: cm information for passive connection |
|
* @conn_param: accpet parameters |
|
*/ |
|
int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
|
{ |
|
struct ib_qp *ibqp; |
|
struct i40iw_qp *iwqp; |
|
struct i40iw_device *iwdev; |
|
struct i40iw_sc_dev *dev; |
|
struct i40iw_cm_core *cm_core; |
|
struct i40iw_cm_node *cm_node; |
|
struct ib_qp_attr attr; |
|
int passive_state; |
|
struct ib_mr *ibmr; |
|
struct i40iw_pd *iwpd; |
|
u16 buf_len = 0; |
|
struct i40iw_kmem_info accept; |
|
enum i40iw_status_code status; |
|
u64 tagged_offset; |
|
unsigned long flags; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
|
if (!ibqp) |
|
return -EINVAL; |
|
|
|
iwqp = to_iwqp(ibqp); |
|
iwdev = iwqp->iwdev; |
|
dev = &iwdev->sc_dev; |
|
cm_core = &iwdev->cm_core; |
|
cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
|
|
|
if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { |
|
cm_node->ipv4 = true; |
|
cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); |
|
} else { |
|
cm_node->ipv4 = false; |
|
i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id); |
|
} |
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"Accept vlan_id=%d\n", |
|
cm_node->vlan_id); |
|
if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
|
if (cm_node->loopbackpartner) |
|
i40iw_rem_ref_cm_node(cm_node->loopbackpartner); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return -EINVAL; |
|
} |
|
|
|
passive_state = atomic_inc_return(&cm_node->passive_state); |
|
if (passive_state == I40IW_SEND_RESET_EVENT) { |
|
i40iw_rem_ref_cm_node(cm_node); |
|
return -ECONNRESET; |
|
} |
|
|
|
cm_node->cm_core->stats_accepts++; |
|
iwqp->cm_node = (void *)cm_node; |
|
cm_node->iwqp = iwqp; |
|
|
|
buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE; |
|
|
|
status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); |
|
|
|
if (status) |
|
return -ENOMEM; |
|
cm_node->pdata.size = conn_param->private_data_len; |
|
accept.addr = iwqp->ietf_mem.va; |
|
accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); |
|
memcpy(accept.addr + accept.size, conn_param->private_data, |
|
conn_param->private_data_len); |
|
|
|
/* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
|
if ((cm_node->ipv4 && |
|
!i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
|
(!cm_node->ipv4 && |
|
!i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { |
|
iwpd = iwqp->iwpd; |
|
tagged_offset = (uintptr_t)iwqp->ietf_mem.va; |
|
ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, |
|
iwqp->ietf_mem.pa, |
|
buf_len, |
|
IB_ACCESS_LOCAL_WRITE, |
|
&tagged_offset); |
|
if (IS_ERR(ibmr)) { |
|
i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); |
|
return -ENOMEM; |
|
} |
|
|
|
ibmr->pd = &iwpd->ibpd; |
|
ibmr->device = iwpd->ibpd.device; |
|
iwqp->lsmm_mr = ibmr; |
|
if (iwqp->page) |
|
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
|
dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, |
|
iwqp->ietf_mem.va, |
|
(accept.size + conn_param->private_data_len), |
|
ibmr->lkey); |
|
|
|
} else { |
|
if (iwqp->page) |
|
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
|
dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0); |
|
} |
|
|
|
if (iwqp->page) |
|
kunmap(iwqp->page); |
|
|
|
iwqp->cm_id = cm_id; |
|
cm_node->cm_id = cm_id; |
|
|
|
cm_id->provider_data = (void *)iwqp; |
|
iwqp->active_conn = 0; |
|
|
|
cm_node->lsmm_size = accept.size + conn_param->private_data_len; |
|
i40iw_cm_init_tsa_conn(iwqp, cm_node); |
|
cm_id->add_ref(cm_id); |
|
i40iw_qp_add_ref(&iwqp->ibqp); |
|
|
|
attr.qp_state = IB_QPS_RTS; |
|
cm_node->qhash_set = false; |
|
i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
|
|
|
cm_node->accelerated = true; |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_move_tail(&cm_node->list, &cm_core->accelerated_list); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
status = |
|
i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); |
|
if (status) |
|
i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n"); |
|
|
|
if (cm_node->loopbackpartner) { |
|
cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; |
|
|
|
/* copy entire MPA frame to our cm_node's frame */ |
|
memcpy(cm_node->loopbackpartner->pdata_buf, |
|
conn_param->private_data, |
|
conn_param->private_data_len); |
|
i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); |
|
} |
|
|
|
if (cm_node->accept_pend) { |
|
atomic_dec(&cm_node->listener->pend_accepts_cnt); |
|
cm_node->accept_pend = 0; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* i40iw_reject - registered call for connection to be rejected |
|
* @cm_id: cm information for passive connection |
|
* @pdata: private data to be sent |
|
* @pdata_len: private data length |
|
*/ |
|
int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
|
{ |
|
struct i40iw_device *iwdev; |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_cm_node *loopback; |
|
|
|
cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
|
loopback = cm_node->loopbackpartner; |
|
cm_node->cm_id = cm_id; |
|
cm_node->pdata.size = pdata_len; |
|
|
|
iwdev = to_iwdev(cm_id->device); |
|
if (!iwdev) |
|
return -EINVAL; |
|
cm_node->cm_core->stats_rejects++; |
|
|
|
if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) |
|
return -EINVAL; |
|
|
|
if (loopback) { |
|
memcpy(&loopback->pdata_buf, pdata, pdata_len); |
|
loopback->pdata.size = pdata_len; |
|
} |
|
|
|
return i40iw_cm_reject(cm_node, pdata, pdata_len); |
|
} |
|
|
|
/** |
|
* i40iw_connect - registered call for connection to be established |
|
* @cm_id: cm information for passive connection |
|
* @conn_param: Information about the connection |
|
*/ |
|
int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
|
{ |
|
struct ib_qp *ibqp; |
|
struct i40iw_qp *iwqp; |
|
struct i40iw_device *iwdev; |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_cm_info cm_info; |
|
struct sockaddr_in *laddr; |
|
struct sockaddr_in *raddr; |
|
struct sockaddr_in6 *laddr6; |
|
struct sockaddr_in6 *raddr6; |
|
int ret = 0; |
|
|
|
ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
|
if (!ibqp) |
|
return -EINVAL; |
|
iwqp = to_iwqp(ibqp); |
|
if (!iwqp) |
|
return -EINVAL; |
|
iwdev = to_iwdev(iwqp->ibqp.device); |
|
if (!iwdev) |
|
return -EINVAL; |
|
|
|
laddr = (struct sockaddr_in *)&cm_id->m_local_addr; |
|
raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; |
|
laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; |
|
raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; |
|
|
|
if (!(laddr->sin_port) || !(raddr->sin_port)) |
|
return -EINVAL; |
|
|
|
iwqp->active_conn = 1; |
|
iwqp->cm_id = NULL; |
|
cm_id->provider_data = iwqp; |
|
|
|
/* set up the connection params for the node */ |
|
if (cm_id->remote_addr.ss_family == AF_INET) { |
|
cm_info.ipv4 = true; |
|
memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); |
|
memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); |
|
cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
|
cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); |
|
cm_info.loc_port = ntohs(laddr->sin_port); |
|
cm_info.rem_port = ntohs(raddr->sin_port); |
|
cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
|
} else { |
|
cm_info.ipv4 = false; |
|
i40iw_copy_ip_ntohl(cm_info.loc_addr, |
|
laddr6->sin6_addr.in6_u.u6_addr32); |
|
i40iw_copy_ip_ntohl(cm_info.rem_addr, |
|
raddr6->sin6_addr.in6_u.u6_addr32); |
|
cm_info.loc_port = ntohs(laddr6->sin6_port); |
|
cm_info.rem_port = ntohs(raddr6->sin6_port); |
|
i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id); |
|
} |
|
cm_info.cm_id = cm_id; |
|
cm_info.tos = cm_id->tos; |
|
cm_info.user_pri = rt_tos2priority(cm_id->tos); |
|
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n", |
|
__func__, cm_id->tos, cm_info.user_pri); |
|
cm_id->add_ref(cm_id); |
|
cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, |
|
conn_param, &cm_info); |
|
|
|
if (IS_ERR(cm_node)) { |
|
ret = PTR_ERR(cm_node); |
|
cm_id->rem_ref(cm_id); |
|
return ret; |
|
} |
|
|
|
if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || |
|
(!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, |
|
raddr6->sin6_addr.in6_u.u6_addr32, |
|
sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { |
|
if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
|
I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) { |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
cm_node->qhash_set = true; |
|
} |
|
|
|
if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, |
|
I40IW_MANAGE_APBVT_ADD)) { |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
|
|
cm_node->apbvt_set = true; |
|
iwqp->cm_node = cm_node; |
|
cm_node->iwqp = iwqp; |
|
iwqp->cm_id = cm_id; |
|
i40iw_qp_add_ref(&iwqp->ibqp); |
|
|
|
if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { |
|
cm_node->state = I40IW_CM_STATE_SYN_SENT; |
|
ret = i40iw_send_syn(cm_node, 0); |
|
if (ret) |
|
goto err; |
|
} |
|
|
|
if (cm_node->loopbackpartner) { |
|
cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD; |
|
i40iw_create_event(cm_node->loopbackpartner, |
|
I40IW_CM_EVENT_MPA_REQ); |
|
} |
|
|
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", |
|
cm_node->rem_port, |
|
cm_node, |
|
cm_node->cm_id); |
|
|
|
return 0; |
|
|
|
err: |
|
if (cm_info.ipv4) |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"Api - connect() FAILED: dest addr=%pI4", |
|
cm_info.rem_addr); |
|
else |
|
i40iw_debug(&iwdev->sc_dev, |
|
I40IW_DEBUG_CM, |
|
"Api - connect() FAILED: dest addr=%pI6", |
|
cm_info.rem_addr); |
|
|
|
i40iw_rem_ref_cm_node(cm_node); |
|
cm_id->rem_ref(cm_id); |
|
iwdev->cm_core.stats_connect_errs++; |
|
return ret; |
|
} |
|
|
|
/** |
|
* i40iw_create_listen - registered call creating listener |
|
* @cm_id: cm information for passive connection |
|
* @backlog: to max accept pending count |
|
*/ |
|
int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) |
|
{ |
|
struct i40iw_device *iwdev; |
|
struct i40iw_cm_listener *cm_listen_node; |
|
struct i40iw_cm_info cm_info; |
|
enum i40iw_status_code ret; |
|
struct sockaddr_in *laddr; |
|
struct sockaddr_in6 *laddr6; |
|
bool wildcard = false; |
|
|
|
iwdev = to_iwdev(cm_id->device); |
|
if (!iwdev) |
|
return -EINVAL; |
|
|
|
laddr = (struct sockaddr_in *)&cm_id->m_local_addr; |
|
laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; |
|
memset(&cm_info, 0, sizeof(cm_info)); |
|
if (laddr->sin_family == AF_INET) { |
|
cm_info.ipv4 = true; |
|
cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
|
cm_info.loc_port = ntohs(laddr->sin_port); |
|
|
|
if (laddr->sin_addr.s_addr != INADDR_ANY) |
|
cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
|
else |
|
wildcard = true; |
|
|
|
} else { |
|
cm_info.ipv4 = false; |
|
i40iw_copy_ip_ntohl(cm_info.loc_addr, |
|
laddr6->sin6_addr.in6_u.u6_addr32); |
|
cm_info.loc_port = ntohs(laddr6->sin6_port); |
|
if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) |
|
i40iw_netdev_vlan_ipv6(cm_info.loc_addr, |
|
&cm_info.vlan_id); |
|
else |
|
wildcard = true; |
|
} |
|
cm_info.backlog = backlog; |
|
cm_info.cm_id = cm_id; |
|
|
|
cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); |
|
if (!cm_listen_node) { |
|
i40iw_pr_err("cm_listen_node == NULL\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
cm_id->provider_data = cm_listen_node; |
|
|
|
cm_listen_node->tos = cm_id->tos; |
|
cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); |
|
cm_info.user_pri = cm_listen_node->user_pri; |
|
|
|
if (!cm_listen_node->reused_node) { |
|
if (wildcard) { |
|
if (cm_info.ipv4) |
|
ret = i40iw_add_mqh_4(iwdev, |
|
&cm_info, |
|
cm_listen_node); |
|
else |
|
ret = i40iw_add_mqh_6(iwdev, |
|
&cm_info, |
|
cm_listen_node); |
|
if (ret) |
|
goto error; |
|
|
|
ret = i40iw_manage_apbvt(iwdev, |
|
cm_info.loc_port, |
|
I40IW_MANAGE_APBVT_ADD); |
|
|
|
if (ret) |
|
goto error; |
|
} else { |
|
ret = i40iw_manage_qhash(iwdev, |
|
&cm_info, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
I40IW_QHASH_MANAGE_TYPE_ADD, |
|
NULL, |
|
true); |
|
if (ret) |
|
goto error; |
|
cm_listen_node->qhash_set = true; |
|
ret = i40iw_manage_apbvt(iwdev, |
|
cm_info.loc_port, |
|
I40IW_MANAGE_APBVT_ADD); |
|
if (ret) |
|
goto error; |
|
} |
|
} |
|
cm_id->add_ref(cm_id); |
|
cm_listen_node->cm_core->stats_listen_created++; |
|
return 0; |
|
error: |
|
i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* i40iw_destroy_listen - registered call to destroy listener |
|
* @cm_id: cm information for passive connection |
|
*/ |
|
int i40iw_destroy_listen(struct iw_cm_id *cm_id) |
|
{ |
|
struct i40iw_device *iwdev; |
|
|
|
iwdev = to_iwdev(cm_id->device); |
|
if (cm_id->provider_data) |
|
i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); |
|
else |
|
i40iw_pr_err("cm_id->provider_data was NULL\n"); |
|
|
|
cm_id->rem_ref(cm_id); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* i40iw_cm_event_connected - handle connected active node |
|
* @event: the info for cm_node of connection |
|
*/ |
|
static void i40iw_cm_event_connected(struct i40iw_cm_event *event) |
|
{ |
|
struct i40iw_qp *iwqp; |
|
struct i40iw_device *iwdev; |
|
struct i40iw_cm_core *cm_core; |
|
struct i40iw_cm_node *cm_node; |
|
struct i40iw_sc_dev *dev; |
|
struct ib_qp_attr attr; |
|
struct iw_cm_id *cm_id; |
|
unsigned long flags; |
|
int status; |
|
bool read0; |
|
|
|
cm_node = event->cm_node; |
|
cm_id = cm_node->cm_id; |
|
iwqp = (struct i40iw_qp *)cm_id->provider_data; |
|
iwdev = to_iwdev(iwqp->ibqp.device); |
|
dev = &iwdev->sc_dev; |
|
cm_core = &iwdev->cm_core; |
|
|
|
if (iwqp->destroyed) { |
|
status = -ETIMEDOUT; |
|
goto error; |
|
} |
|
i40iw_cm_init_tsa_conn(iwqp, cm_node); |
|
read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); |
|
if (iwqp->page) |
|
iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
|
dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); |
|
if (iwqp->page) |
|
kunmap(iwqp->page); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.qp_state = IB_QPS_RTS; |
|
cm_node->qhash_set = false; |
|
i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
|
|
|
cm_node->accelerated = true; |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_move_tail(&cm_node->list, &cm_core->accelerated_list); |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, |
|
0); |
|
if (status) |
|
i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n"); |
|
|
|
return; |
|
|
|
error: |
|
iwqp->cm_id = NULL; |
|
cm_id->provider_data = NULL; |
|
i40iw_send_cm_event(event->cm_node, |
|
cm_id, |
|
IW_CM_EVENT_CONNECT_REPLY, |
|
status); |
|
cm_id->rem_ref(cm_id); |
|
i40iw_rem_ref_cm_node(event->cm_node); |
|
} |
|
|
|
/** |
|
* i40iw_cm_event_reset - handle reset |
|
* @event: the info for cm_node of connection |
|
*/ |
|
static void i40iw_cm_event_reset(struct i40iw_cm_event *event) |
|
{ |
|
struct i40iw_cm_node *cm_node = event->cm_node; |
|
struct iw_cm_id *cm_id = cm_node->cm_id; |
|
struct i40iw_qp *iwqp; |
|
|
|
if (!cm_id) |
|
return; |
|
|
|
iwqp = cm_id->provider_data; |
|
if (!iwqp) |
|
return; |
|
|
|
i40iw_debug(cm_node->dev, |
|
I40IW_DEBUG_CM, |
|
"reset event %p - cm_id = %p\n", |
|
event->cm_node, cm_id); |
|
iwqp->cm_id = NULL; |
|
|
|
i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); |
|
i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); |
|
} |
|
|
|
/** |
|
* i40iw_cm_event_handler - worker thread callback to send event to cm upper layer |
|
* @work: pointer of cm event info. |
|
*/ |
|
static void i40iw_cm_event_handler(struct work_struct *work) |
|
{ |
|
struct i40iw_cm_event *event = container_of(work, |
|
struct i40iw_cm_event, |
|
event_work); |
|
struct i40iw_cm_node *cm_node; |
|
|
|
if (!event || !event->cm_node || !event->cm_node->cm_core) |
|
return; |
|
|
|
cm_node = event->cm_node; |
|
|
|
switch (event->type) { |
|
case I40IW_CM_EVENT_MPA_REQ: |
|
i40iw_send_cm_event(cm_node, |
|
cm_node->cm_id, |
|
IW_CM_EVENT_CONNECT_REQUEST, |
|
0); |
|
break; |
|
case I40IW_CM_EVENT_RESET: |
|
i40iw_cm_event_reset(event); |
|
break; |
|
case I40IW_CM_EVENT_CONNECTED: |
|
if (!event->cm_node->cm_id || |
|
(event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) |
|
break; |
|
i40iw_cm_event_connected(event); |
|
break; |
|
case I40IW_CM_EVENT_MPA_REJECT: |
|
if (!event->cm_node->cm_id || |
|
(cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
|
break; |
|
i40iw_send_cm_event(cm_node, |
|
cm_node->cm_id, |
|
IW_CM_EVENT_CONNECT_REPLY, |
|
-ECONNREFUSED); |
|
break; |
|
case I40IW_CM_EVENT_ABORTED: |
|
if (!event->cm_node->cm_id || |
|
(event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
|
break; |
|
i40iw_event_connect_error(event); |
|
break; |
|
default: |
|
i40iw_pr_err("event type = %d\n", event->type); |
|
break; |
|
} |
|
|
|
event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); |
|
i40iw_rem_ref_cm_node(event->cm_node); |
|
kfree(event); |
|
} |
|
|
|
/** |
|
* i40iw_cm_post_event - queue event request for worker thread |
|
* @event: cm node's info for up event call |
|
*/ |
|
static void i40iw_cm_post_event(struct i40iw_cm_event *event) |
|
{ |
|
atomic_inc(&event->cm_node->ref_count); |
|
event->cm_info.cm_id->add_ref(event->cm_info.cm_id); |
|
INIT_WORK(&event->event_work, i40iw_cm_event_handler); |
|
|
|
queue_work(event->cm_node->cm_core->event_wq, &event->event_work); |
|
} |
|
|
|
/** |
|
* i40iw_qhash_ctrl - enable/disable qhash for list |
|
* @iwdev: device pointer |
|
* @parent_listen_node: parent listen node |
|
* @nfo: cm info node |
|
* @ipaddr: Pointer to IPv4 or IPv6 address |
|
* @ipv4: flag indicating IPv4 when true |
|
* @ifup: flag indicating interface up when true |
|
* |
|
* Enables or disables the qhash for the node in the child |
|
* listen list that matches ipaddr. If no matching IP was found |
|
* it will allocate and add a new child listen node to the |
|
* parent listen node. The listen_list_lock is assumed to be |
|
* held when called. |
|
*/ |
|
static void i40iw_qhash_ctrl(struct i40iw_device *iwdev, |
|
struct i40iw_cm_listener *parent_listen_node, |
|
struct i40iw_cm_info *nfo, |
|
u32 *ipaddr, bool ipv4, bool ifup) |
|
{ |
|
struct list_head *child_listen_list = &parent_listen_node->child_listen_list; |
|
struct i40iw_cm_listener *child_listen_node; |
|
struct list_head *pos, *tpos; |
|
enum i40iw_status_code ret; |
|
bool node_allocated = false; |
|
enum i40iw_quad_hash_manage_type op = |
|
ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; |
|
|
|
list_for_each_safe(pos, tpos, child_listen_list) { |
|
child_listen_node = |
|
list_entry(pos, |
|
struct i40iw_cm_listener, |
|
child_listen_list); |
|
if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) |
|
goto set_qhash; |
|
} |
|
|
|
/* if not found then add a child listener if interface is going up */ |
|
if (!ifup) |
|
return; |
|
child_listen_node = kmemdup(parent_listen_node, |
|
sizeof(*child_listen_node), GFP_ATOMIC); |
|
if (!child_listen_node) |
|
return; |
|
node_allocated = true; |
|
|
|
memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); |
|
|
|
set_qhash: |
|
memcpy(nfo->loc_addr, |
|
child_listen_node->loc_addr, |
|
sizeof(nfo->loc_addr)); |
|
nfo->vlan_id = child_listen_node->vlan_id; |
|
ret = i40iw_manage_qhash(iwdev, nfo, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
op, |
|
NULL, false); |
|
if (!ret) { |
|
child_listen_node->qhash_set = ifup; |
|
if (node_allocated) |
|
list_add(&child_listen_node->child_listen_list, |
|
&parent_listen_node->child_listen_list); |
|
} else if (node_allocated) { |
|
kfree(child_listen_node); |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_cm_teardown_connections - teardown QPs |
|
* @iwdev: device pointer |
|
* @ipaddr: Pointer to IPv4 or IPv6 address |
|
* @nfo: cm info node |
|
* @disconnect_all: flag indicating disconnect all QPs |
|
* teardown QPs where source or destination addr matches ip addr |
|
*/ |
|
void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr, |
|
struct i40iw_cm_info *nfo, |
|
bool disconnect_all) |
|
{ |
|
struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
|
struct list_head *list_core_temp; |
|
struct list_head *list_node; |
|
struct i40iw_cm_node *cm_node; |
|
unsigned long flags; |
|
struct list_head teardown_list; |
|
struct ib_qp_attr attr; |
|
|
|
INIT_LIST_HEAD(&teardown_list); |
|
spin_lock_irqsave(&cm_core->ht_lock, flags); |
|
list_for_each_safe(list_node, list_core_temp, |
|
&cm_core->accelerated_list) { |
|
cm_node = container_of(list_node, struct i40iw_cm_node, list); |
|
if (disconnect_all || |
|
(nfo->vlan_id == cm_node->vlan_id && |
|
(!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || |
|
!memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { |
|
atomic_inc(&cm_node->ref_count); |
|
list_add(&cm_node->teardown_entry, &teardown_list); |
|
} |
|
} |
|
list_for_each_safe(list_node, list_core_temp, |
|
&cm_core->non_accelerated_list) { |
|
cm_node = container_of(list_node, struct i40iw_cm_node, list); |
|
if (disconnect_all || |
|
(nfo->vlan_id == cm_node->vlan_id && |
|
(!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) || |
|
!memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) { |
|
atomic_inc(&cm_node->ref_count); |
|
list_add(&cm_node->teardown_entry, &teardown_list); |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
|
|
|
list_for_each_safe(list_node, list_core_temp, &teardown_list) { |
|
cm_node = container_of(list_node, struct i40iw_cm_node, |
|
teardown_entry); |
|
attr.qp_state = IB_QPS_ERR; |
|
i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
|
if (iwdev->reset) |
|
i40iw_cm_disconn(cm_node->iwqp); |
|
i40iw_rem_ref_cm_node(cm_node); |
|
} |
|
} |
|
|
|
/** |
|
* i40iw_ifdown_notify - process an ifdown on an interface |
|
* @iwdev: device pointer |
|
* @netdev: network interface device structure |
|
* @ipaddr: Pointer to IPv4 or IPv6 address |
|
* @ipv4: flag indicating IPv4 when true |
|
* @ifup: flag indicating interface up when true |
|
*/ |
|
void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev, |
|
u32 *ipaddr, bool ipv4, bool ifup) |
|
{ |
|
struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
|
unsigned long flags; |
|
struct i40iw_cm_listener *listen_node; |
|
static const u32 ip_zero[4] = { 0, 0, 0, 0 }; |
|
struct i40iw_cm_info nfo; |
|
u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); |
|
enum i40iw_status_code ret; |
|
enum i40iw_quad_hash_manage_type op = |
|
ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE; |
|
|
|
nfo.vlan_id = vlan_id; |
|
nfo.ipv4 = ipv4; |
|
|
|
/* Disable or enable qhash for listeners */ |
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
|
list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
|
if (vlan_id == listen_node->vlan_id && |
|
(!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) || |
|
!memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) { |
|
memcpy(nfo.loc_addr, listen_node->loc_addr, |
|
sizeof(nfo.loc_addr)); |
|
nfo.loc_port = listen_node->loc_port; |
|
nfo.user_pri = listen_node->user_pri; |
|
if (!list_empty(&listen_node->child_listen_list)) { |
|
i40iw_qhash_ctrl(iwdev, |
|
listen_node, |
|
&nfo, |
|
ipaddr, ipv4, ifup); |
|
} else if (memcmp(listen_node->loc_addr, ip_zero, |
|
ipv4 ? 4 : 16)) { |
|
ret = i40iw_manage_qhash(iwdev, |
|
&nfo, |
|
I40IW_QHASH_TYPE_TCP_SYN, |
|
op, |
|
NULL, |
|
false); |
|
if (!ret) |
|
listen_node->qhash_set = ifup; |
|
} |
|
} |
|
} |
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
|
|
|
/* teardown connected qp's on ifdown */ |
|
if (!ifup) |
|
i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false); |
|
}
|
|
|