nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity
kernel/include/uapi/linux/tipc.h
Tung Nguyen 42e5425aa0 tipc: introduce new socket option TIPC_SOCK_RECVQ_USED 
When using TIPC_SOCK_RECVQ_DEPTH for getsockopt(), it returns the
number of buffers in receive socket buffer which is not so helpful
for user space applications.

This commit introduces the new option TIPC_SOCK_RECVQ_USED which
returns the current allocated bytes of the receive socket buffer.
This helps user space applications dimension its buffer usage to
avoid buffer overload issue.

Signed-off-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-19 14:59:05 -07:00

291 lines
8.1 KiB
C
Raw Blame History

/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
* include/uapi/linux/tipc.h: Header for TIPC socket interface
*
* Copyright (c) 2003-2006, 2015-2016 Ericsson AB
* Copyright (c) 2005, 2010-2011, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_TIPC_H_
#define _LINUX_TIPC_H_
#include <linux/types.h>
#include <linux/sockios.h>
/*
* TIPC addressing primitives
*/
struct tipc_socket_addr {
__u32 ref;
__u32 node;
};
struct tipc_service_addr {
__u32 type;
__u32 instance;
};
struct tipc_service_range {
__u32 type;
__u32 lower;
__u32 upper;
};
/*
* Application-accessible service types
*/
#define TIPC_NODE_STATE 0 /* node state service type */
#define TIPC_TOP_SRV 1 /* topology server service type */
#define TIPC_LINK_STATE 2 /* link state service type */
#define TIPC_RESERVED_TYPES 64 /* lowest user-allowed service type */
/*
* Publication scopes when binding service / service range
*/
enum tipc_scope {
TIPC_CLUSTER_SCOPE = 2, /* 0 can also be used */
TIPC_NODE_SCOPE = 3
};
/*
* Limiting values for messages
*/
#define TIPC_MAX_USER_MSG_SIZE 66000U
/*
* Message importance levels
*/
#define TIPC_LOW_IMPORTANCE 0
#define TIPC_MEDIUM_IMPORTANCE 1
#define TIPC_HIGH_IMPORTANCE 2
#define TIPC_CRITICAL_IMPORTANCE 3
/*
* Msg rejection/connection shutdown reasons
*/
#define TIPC_OK 0
#define TIPC_ERR_NO_NAME 1
#define TIPC_ERR_NO_PORT 2
#define TIPC_ERR_NO_NODE 3
#define TIPC_ERR_OVERLOAD 4
#define TIPC_CONN_SHUTDOWN 5
/*
* TIPC topology subscription service definitions
*/
#define TIPC_SUB_PORTS 0x01 /* filter: evt at each match */
#define TIPC_SUB_SERVICE 0x02 /* filter: evt at first up/last down */
#define TIPC_SUB_CANCEL 0x04 /* filter: cancel a subscription */
#define TIPC_WAIT_FOREVER (~0) /* timeout for permanent subscription */
struct tipc_subscr {
struct tipc_service_range seq; /* range of interest */
__u32 timeout; /* subscription duration (in ms) */
__u32 filter; /* bitmask of filter options */
char usr_handle[8]; /* available for subscriber use */
};
#define TIPC_PUBLISHED 1 /* publication event */
#define TIPC_WITHDRAWN 2 /* withdrawal event */
#define TIPC_SUBSCR_TIMEOUT 3 /* subscription timeout event */
struct tipc_event {
__u32 event; /* event type */
__u32 found_lower; /* matching range */
__u32 found_upper; /* " " */
struct tipc_socket_addr port; /* associated socket */
struct tipc_subscr s; /* associated subscription */
};
/*
* Socket API
*/
#ifndef AF_TIPC
#define AF_TIPC 30
#endif
#ifndef PF_TIPC
#define PF_TIPC AF_TIPC
#endif
#ifndef SOL_TIPC
#define SOL_TIPC 271
#endif
#define TIPC_ADDR_MCAST 1
#define TIPC_SERVICE_RANGE 1
#define TIPC_SERVICE_ADDR 2
#define TIPC_SOCKET_ADDR 3
struct sockaddr_tipc {
unsigned short family;
unsigned char addrtype;
signed char scope;
union {
struct tipc_socket_addr id;
struct tipc_service_range nameseq;
struct {
struct tipc_service_addr name;
__u32 domain;
} name;
} addr;
};
/*
* Ancillary data objects supported by recvmsg()
*/
#define TIPC_ERRINFO 1 /* error info */
#define TIPC_RETDATA 2 /* returned data */
#define TIPC_DESTNAME 3 /* destination name */
/*
* TIPC-specific socket option names
*/
#define TIPC_IMPORTANCE 127 /* Default: TIPC_LOW_IMPORTANCE */
#define TIPC_SRC_DROPPABLE 128 /* Default: based on socket type */
#define TIPC_DEST_DROPPABLE 129 /* Default: based on socket type */
#define TIPC_CONN_TIMEOUT 130 /* Default: 8000 (ms) */
#define TIPC_NODE_RECVQ_DEPTH 131 /* Default: none (read only) */
#define TIPC_SOCK_RECVQ_DEPTH 132 /* Default: none (read only) */
#define TIPC_MCAST_BROADCAST 133 /* Default: TIPC selects. No arg */
#define TIPC_MCAST_REPLICAST 134 /* Default: TIPC selects. No arg */
#define TIPC_GROUP_JOIN 135 /* Takes struct tipc_group_req* */
#define TIPC_GROUP_LEAVE 136 /* No argument */
#define TIPC_SOCK_RECVQ_USED 137 /* Default: none (read only) */
/*
* Flag values
*/
#define TIPC_GROUP_LOOPBACK 0x1 /* Receive copy of sent msg when match */
#define TIPC_GROUP_MEMBER_EVTS 0x2 /* Receive membership events in socket */
struct tipc_group_req {
__u32 type; /* group id */
__u32 instance; /* member id */
__u32 scope; /* cluster/node */
__u32 flags;
};
/*
* Maximum sizes of TIPC bearer-related names (including terminating NULL)
* The string formatting for each name element is:
* media: media
* interface: media:interface name
* link: node:interface-node:interface
*/
#define TIPC_NODEID_LEN 16
#define TIPC_MAX_MEDIA_NAME 16
#define TIPC_MAX_IF_NAME 16
#define TIPC_MAX_BEARER_NAME 32
#define TIPC_MAX_LINK_NAME 68
#define SIOCGETLINKNAME SIOCPROTOPRIVATE
#define SIOCGETNODEID (SIOCPROTOPRIVATE + 1)
struct tipc_sioc_ln_req {
__u32 peer;
__u32 bearer_id;
char linkname[TIPC_MAX_LINK_NAME];
};
struct tipc_sioc_nodeid_req {
__u32 peer;
char node_id[TIPC_NODEID_LEN];
};
/* The macros and functions below are deprecated:
*/
#define TIPC_CFG_SRV 0
#define TIPC_ZONE_SCOPE 1
#define TIPC_ADDR_NAMESEQ 1
#define TIPC_ADDR_NAME 2
#define TIPC_ADDR_ID 3
#define TIPC_NODE_BITS 12
#define TIPC_CLUSTER_BITS 12
#define TIPC_ZONE_BITS 8
#define TIPC_NODE_OFFSET 0
#define TIPC_CLUSTER_OFFSET TIPC_NODE_BITS
#define TIPC_ZONE_OFFSET (TIPC_CLUSTER_OFFSET + TIPC_CLUSTER_BITS)
#define TIPC_NODE_SIZE ((1UL << TIPC_NODE_BITS) - 1)
#define TIPC_CLUSTER_SIZE ((1UL << TIPC_CLUSTER_BITS) - 1)
#define TIPC_ZONE_SIZE ((1UL << TIPC_ZONE_BITS) - 1)
#define TIPC_NODE_MASK (TIPC_NODE_SIZE << TIPC_NODE_OFFSET)
#define TIPC_CLUSTER_MASK (TIPC_CLUSTER_SIZE << TIPC_CLUSTER_OFFSET)
#define TIPC_ZONE_MASK (TIPC_ZONE_SIZE << TIPC_ZONE_OFFSET)
#define TIPC_ZONE_CLUSTER_MASK (TIPC_ZONE_MASK | TIPC_CLUSTER_MASK)
#define tipc_portid tipc_socket_addr
#define tipc_name tipc_service_addr
#define tipc_name_seq tipc_service_range
static inline __u32 tipc_addr(unsigned int zone,
unsigned int cluster,
unsigned int node)
{
return (zone << TIPC_ZONE_OFFSET) |
(cluster << TIPC_CLUSTER_OFFSET) |
node;
}
static inline unsigned int tipc_zone(__u32 addr)
{
return addr >> TIPC_ZONE_OFFSET;
}
static inline unsigned int tipc_cluster(__u32 addr)
{
return (addr & TIPC_CLUSTER_MASK) >> TIPC_CLUSTER_OFFSET;
}
static inline unsigned int tipc_node(__u32 addr)
{
return addr & TIPC_NODE_MASK;
}
#endif
View git blame Copy permalink