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Alexei Starovoitov authoredintroduce new setsockopt() command: setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd)) where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...) and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER setsockopt() calls bpf_prog_get() which increments refcnt of the program, so it doesn't get unloaded while socket is using the program. The same eBPF program can be attached to multiple sockets. User task exit automatically closes socket which calls sk_filter_uncharge() which decrements refcnt of eBPF program Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>Alexei Starovoitov authoredintroduce new setsockopt() command: setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd)) where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...) and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER setsockopt() calls bpf_prog_get() which increments refcnt of the program, so it doesn't get unloaded while socket is using the program. The same eBPF program can be attached to multiple sockets. User task exit automatically closes socket which calls sk_filter_uncharge() which decrements refcnt of eBPF program Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
socket.h 2.97 KiB
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1997, 1999, 2000, 2001 Ralf Baechle
* Copyright (C) 2000, 2001 Silicon Graphics, Inc.
*/
#ifndef _UAPI_ASM_SOCKET_H
#define _UAPI_ASM_SOCKET_H
#include <asm/sockios.h>
/*
* For setsockopt(2)
*
* This defines are ABI conformant as far as Linux supports these ...
*/
#define SOL_SOCKET 0xffff
#define SO_DEBUG 0x0001 /* Record debugging information. */
#define SO_REUSEADDR 0x0004 /* Allow reuse of local addresses. */
#define SO_KEEPALIVE 0x0008 /* Keep connections alive and send
SIGPIPE when they die. */
#define SO_DONTROUTE 0x0010 /* Don't do local routing. */
#define SO_BROADCAST 0x0020 /* Allow transmission of
broadcast messages. */
#define SO_LINGER 0x0080 /* Block on close of a reliable
socket to transmit pending data. */
#define SO_OOBINLINE 0x0100 /* Receive out-of-band data in-band. */
#define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */
#define SO_TYPE 0x1008 /* Compatible name for SO_STYLE. */
#define SO_STYLE SO_TYPE /* Synonym */
#define SO_ERROR 0x1007 /* get error status and clear */
#define SO_SNDBUF 0x1001 /* Send buffer size. */
#define SO_RCVBUF 0x1002 /* Receive buffer. */
#define SO_SNDLOWAT 0x1003 /* send low-water mark */
#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
#define SO_SNDTIMEO 0x1005 /* send timeout */
#define SO_RCVTIMEO 0x1006 /* receive timeout */
#define SO_ACCEPTCONN 0x1009
#define SO_PROTOCOL 0x1028 /* protocol type */
#define SO_DOMAIN 0x1029 /* domain/socket family */
/* linux-specific, might as well be the same as on i386 */
#define SO_NO_CHECK 11
#define SO_PRIORITY 12
#define SO_BSDCOMPAT 14
#define SO_PASSCRED 17
#define SO_PEERCRED 18
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define SO_SECURITY_AUTHENTICATION 22
#define SO_SECURITY_ENCRYPTION_TRANSPORT 23
#define SO_SECURITY_ENCRYPTION_NETWORK 24
#define SO_BINDTODEVICE 25
/* Socket filtering */
#define SO_ATTACH_FILTER 26
#define SO_DETACH_FILTER 27
#define SO_GET_FILTER SO_ATTACH_FILTER
#define SO_PEERNAME 28
#define SO_TIMESTAMP 29
#define SCM_TIMESTAMP SO_TIMESTAMP
#define SO_PEERSEC 30