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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c0bceb97db
We introduce a feature that works like a combination of TCP_NAGLE and TCP_CORK, but without some of the weaknesses of those. In particular, we will not observe long delivery delays because of delayed acks, since the algorithm itself decides if and when acks are to be sent from the receiving peer. - The nagle property as such is determined by manipulating a new 'maxnagle' field in struct tipc_sock. If certain conditions are met, 'maxnagle' will define max size of the messages which can be bundled. If it is set to zero no messages are ever bundled, implying that the nagle property is disabled. - A socket with the nagle property enabled enters nagle mode when more than 4 messages have been sent out without receiving any data message from the peer. - A socket leaves nagle mode whenever it receives a data message from the peer. In nagle mode, messages smaller than 'maxnagle' are accumulated in the socket write queue. The last buffer in the queue is marked with a new 'ack_required' bit, which forces the receiving peer to send a CONN_ACK message back to the sender upon reception. The accumulated contents of the write queue is transmitted when one of the following events or conditions occur. - A CONN_ACK message is received from the peer. - A data message is received from the peer. - A SOCK_WAKEUP pseudo message is received from the link level. - The write queue contains more than 64 1k blocks of data. - The connection is being shut down. - There is no CONN_ACK message to expect. I.e., there is currently no outstanding message where the 'ack_required' bit was set. As a consequence, the first message added after we enter nagle mode is always sent directly with this bit set. This new feature gives a 50-100% improvement of throughput for small (i.e., less than MTU size) messages, while it might add up to one RTT to latency time when the socket is in nagle mode. Acked-by: Ying Xue <ying.xue@windreiver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
293 lines
8.1 KiB
C
293 lines
8.1 KiB
C
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
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/*
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* include/uapi/linux/tipc.h: Header for TIPC socket interface
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*
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* Copyright (c) 2003-2006, 2015-2016 Ericsson AB
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* Copyright (c) 2005, 2010-2011, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_TIPC_H_
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#define _LINUX_TIPC_H_
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#include <linux/types.h>
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#include <linux/sockios.h>
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/*
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* TIPC addressing primitives
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*/
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struct tipc_socket_addr {
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__u32 ref;
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__u32 node;
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};
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struct tipc_service_addr {
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__u32 type;
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__u32 instance;
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};
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struct tipc_service_range {
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__u32 type;
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__u32 lower;
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__u32 upper;
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};
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/*
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* Application-accessible service types
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*/
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#define TIPC_NODE_STATE 0 /* node state service type */
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#define TIPC_TOP_SRV 1 /* topology server service type */
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#define TIPC_LINK_STATE 2 /* link state service type */
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#define TIPC_RESERVED_TYPES 64 /* lowest user-allowed service type */
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/*
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* Publication scopes when binding service / service range
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*/
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enum tipc_scope {
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TIPC_CLUSTER_SCOPE = 2, /* 0 can also be used */
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TIPC_NODE_SCOPE = 3
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};
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/*
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* Limiting values for messages
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*/
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#define TIPC_MAX_USER_MSG_SIZE 66000U
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/*
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* Message importance levels
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*/
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#define TIPC_LOW_IMPORTANCE 0
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#define TIPC_MEDIUM_IMPORTANCE 1
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#define TIPC_HIGH_IMPORTANCE 2
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#define TIPC_CRITICAL_IMPORTANCE 3
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/*
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* Msg rejection/connection shutdown reasons
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*/
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#define TIPC_OK 0
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#define TIPC_ERR_NO_NAME 1
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#define TIPC_ERR_NO_PORT 2
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#define TIPC_ERR_NO_NODE 3
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#define TIPC_ERR_OVERLOAD 4
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#define TIPC_CONN_SHUTDOWN 5
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/*
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* TIPC topology subscription service definitions
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*/
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#define TIPC_SUB_PORTS 0x01 /* filter: evt at each match */
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#define TIPC_SUB_SERVICE 0x02 /* filter: evt at first up/last down */
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#define TIPC_SUB_CANCEL 0x04 /* filter: cancel a subscription */
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#define TIPC_WAIT_FOREVER (~0) /* timeout for permanent subscription */
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struct tipc_subscr {
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struct tipc_service_range seq; /* range of interest */
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__u32 timeout; /* subscription duration (in ms) */
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__u32 filter; /* bitmask of filter options */
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char usr_handle[8]; /* available for subscriber use */
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};
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#define TIPC_PUBLISHED 1 /* publication event */
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#define TIPC_WITHDRAWN 2 /* withdrawal event */
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#define TIPC_SUBSCR_TIMEOUT 3 /* subscription timeout event */
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struct tipc_event {
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__u32 event; /* event type */
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__u32 found_lower; /* matching range */
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__u32 found_upper; /* " " */
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struct tipc_socket_addr port; /* associated socket */
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struct tipc_subscr s; /* associated subscription */
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};
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/*
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* Socket API
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*/
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#ifndef AF_TIPC
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#define AF_TIPC 30
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#endif
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#ifndef PF_TIPC
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#define PF_TIPC AF_TIPC
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#endif
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#ifndef SOL_TIPC
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#define SOL_TIPC 271
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#endif
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#define TIPC_ADDR_MCAST 1
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#define TIPC_SERVICE_RANGE 1
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#define TIPC_SERVICE_ADDR 2
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#define TIPC_SOCKET_ADDR 3
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struct sockaddr_tipc {
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unsigned short family;
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unsigned char addrtype;
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signed char scope;
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union {
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struct tipc_socket_addr id;
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struct tipc_service_range nameseq;
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struct {
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struct tipc_service_addr name;
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__u32 domain;
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} name;
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} addr;
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};
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/*
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* Ancillary data objects supported by recvmsg()
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*/
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#define TIPC_ERRINFO 1 /* error info */
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#define TIPC_RETDATA 2 /* returned data */
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#define TIPC_DESTNAME 3 /* destination name */
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/*
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* TIPC-specific socket option names
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*/
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#define TIPC_IMPORTANCE 127 /* Default: TIPC_LOW_IMPORTANCE */
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#define TIPC_SRC_DROPPABLE 128 /* Default: based on socket type */
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#define TIPC_DEST_DROPPABLE 129 /* Default: based on socket type */
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#define TIPC_CONN_TIMEOUT 130 /* Default: 8000 (ms) */
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#define TIPC_NODE_RECVQ_DEPTH 131 /* Default: none (read only) */
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#define TIPC_SOCK_RECVQ_DEPTH 132 /* Default: none (read only) */
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#define TIPC_MCAST_BROADCAST 133 /* Default: TIPC selects. No arg */
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#define TIPC_MCAST_REPLICAST 134 /* Default: TIPC selects. No arg */
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#define TIPC_GROUP_JOIN 135 /* Takes struct tipc_group_req* */
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#define TIPC_GROUP_LEAVE 136 /* No argument */
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#define TIPC_SOCK_RECVQ_USED 137 /* Default: none (read only) */
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#define TIPC_NODELAY 138 /* Default: false */
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/*
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* Flag values
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*/
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#define TIPC_GROUP_LOOPBACK 0x1 /* Receive copy of sent msg when match */
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#define TIPC_GROUP_MEMBER_EVTS 0x2 /* Receive membership events in socket */
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struct tipc_group_req {
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__u32 type; /* group id */
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__u32 instance; /* member id */
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__u32 scope; /* cluster/node */
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__u32 flags;
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};
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/*
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* Maximum sizes of TIPC bearer-related names (including terminating NULL)
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* The string formatting for each name element is:
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* media: media
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* interface: media:interface name
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* link: node:interface-node:interface
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*/
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#define TIPC_NODEID_LEN 16
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#define TIPC_MAX_MEDIA_NAME 16
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#define TIPC_MAX_IF_NAME 16
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#define TIPC_MAX_BEARER_NAME 32
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#define TIPC_MAX_LINK_NAME 68
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#define SIOCGETLINKNAME SIOCPROTOPRIVATE
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#define SIOCGETNODEID (SIOCPROTOPRIVATE + 1)
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struct tipc_sioc_ln_req {
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__u32 peer;
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__u32 bearer_id;
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char linkname[TIPC_MAX_LINK_NAME];
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};
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struct tipc_sioc_nodeid_req {
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__u32 peer;
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char node_id[TIPC_NODEID_LEN];
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};
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/* The macros and functions below are deprecated:
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*/
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#define TIPC_CFG_SRV 0
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#define TIPC_ZONE_SCOPE 1
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#define TIPC_ADDR_NAMESEQ 1
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#define TIPC_ADDR_NAME 2
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#define TIPC_ADDR_ID 3
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#define TIPC_NODE_BITS 12
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#define TIPC_CLUSTER_BITS 12
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#define TIPC_ZONE_BITS 8
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#define TIPC_NODE_OFFSET 0
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#define TIPC_CLUSTER_OFFSET TIPC_NODE_BITS
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#define TIPC_ZONE_OFFSET (TIPC_CLUSTER_OFFSET + TIPC_CLUSTER_BITS)
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#define TIPC_NODE_SIZE ((1UL << TIPC_NODE_BITS) - 1)
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#define TIPC_CLUSTER_SIZE ((1UL << TIPC_CLUSTER_BITS) - 1)
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#define TIPC_ZONE_SIZE ((1UL << TIPC_ZONE_BITS) - 1)
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#define TIPC_NODE_MASK (TIPC_NODE_SIZE << TIPC_NODE_OFFSET)
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#define TIPC_CLUSTER_MASK (TIPC_CLUSTER_SIZE << TIPC_CLUSTER_OFFSET)
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#define TIPC_ZONE_MASK (TIPC_ZONE_SIZE << TIPC_ZONE_OFFSET)
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#define TIPC_ZONE_CLUSTER_MASK (TIPC_ZONE_MASK | TIPC_CLUSTER_MASK)
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#define tipc_portid tipc_socket_addr
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#define tipc_name tipc_service_addr
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#define tipc_name_seq tipc_service_range
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static inline __u32 tipc_addr(unsigned int zone,
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unsigned int cluster,
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unsigned int node)
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{
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return (zone << TIPC_ZONE_OFFSET) |
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(cluster << TIPC_CLUSTER_OFFSET) |
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node;
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}
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static inline unsigned int tipc_zone(__u32 addr)
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{
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return addr >> TIPC_ZONE_OFFSET;
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}
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static inline unsigned int tipc_cluster(__u32 addr)
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{
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return (addr & TIPC_CLUSTER_MASK) >> TIPC_CLUSTER_OFFSET;
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}
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static inline unsigned int tipc_node(__u32 addr)
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{
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return addr & TIPC_NODE_MASK;
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}
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#endif
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