7abab91135
on each socket buffer with the socket buffer's mutex. This sleep lock is
used to serialize I/O on sockets in order to prevent I/O interlacing.
This change replaces the custom sleep lock with an sx(9) lock, which
results in marginally better performance, better handling of contention
during simultaneous socket I/O across multiple threads, and a cleaner
separation between the different layers of locking in socket buffers.
Specifically, the socket buffer mutex is now solely responsible for
serializing simultaneous operation on the socket buffer data structure,
and not for I/O serialization.
While here, fix two historic bugs:
(1) a bug allowing I/O to be occasionally interlaced during long I/O
operations (discovere by Isilon).
(2) a bug in which failed non-blocking acquisition of the socket buffer
I/O serialization lock might be ignored (discovered by sam).
SCTP portion of this patch submitted by rrs.
523 lines
12 KiB
C
523 lines
12 KiB
C
/*-
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* Copyright (c) 2007 Robert N. M. Watson
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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
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* are met:
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Debugger routines relating to sockets, protocols, etc, for use in DDB.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/domain.h>
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#include <sys/kernel.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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static void
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db_print_sotype(short so_type)
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{
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switch (so_type) {
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case SOCK_STREAM:
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db_printf("SOCK_STREAM");
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break;
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case SOCK_DGRAM:
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db_printf("SOCK_DGRAM");
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break;
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case SOCK_RAW:
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db_printf("SOCK_RAW");
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break;
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case SOCK_RDM:
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db_printf("SOCK_RDM");
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break;
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case SOCK_SEQPACKET:
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db_printf("SOCK_SEQPACKET");
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break;
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default:
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db_printf("unknown");
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break;
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}
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}
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static void
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db_print_sooptions(short so_options)
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{
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int comma;
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comma = 0;
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if (so_options & SO_DEBUG) {
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db_printf("%sSO_DEBUG", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_ACCEPTCONN) {
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db_printf("%sSO_ACCEPTCONN", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_REUSEADDR) {
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db_printf("%sSO_REUSEADDR", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_KEEPALIVE) {
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db_printf("%sSO_KEEPALIVE", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_DONTROUTE) {
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db_printf("%sSO_DONTROUTE", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_BROADCAST) {
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db_printf("%sSO_BROADCAST", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_USELOOPBACK) {
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db_printf("%sSO_USELOOPBACK", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_LINGER) {
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db_printf("%sSO_LINGER", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_OOBINLINE) {
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db_printf("%sSO_OOBINLINE", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_REUSEPORT) {
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db_printf("%sSO_REUSEPORT", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_TIMESTAMP) {
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db_printf("%sSO_TIMESTAMP", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_NOSIGPIPE) {
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db_printf("%sSO_NOSIGPIPE", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_ACCEPTFILTER) {
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db_printf("%sSO_ACCEPTFILTER", comma ? ", " : "");
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comma = 1;
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}
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if (so_options & SO_BINTIME) {
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db_printf("%sSO_BINTIME", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_sostate(short so_state)
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{
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int comma;
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comma = 0;
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if (so_state & SS_NOFDREF) {
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db_printf("%sSS_FDREF", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_ISCONNECTED) {
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db_printf("%sSS_ISCONNECTED", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_ISCONNECTING) {
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db_printf("%sSS_ISCONNECTING", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_ISDISCONNECTING) {
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db_printf("%sSS_ISDISCONNECTING", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_NBIO) {
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db_printf("%sSS_NBIO", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_ASYNC) {
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db_printf("%sSS_ASYNC", comma ? ", " : "");
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comma = 1;
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}
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if (so_state & SS_ISCONFIRMING) {
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db_printf("%sSS_ISCONFIRMING", comma ? ", " : "");
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comma = 1;
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}
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comma = 0;
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if (so_state & SS_PROTOREF) {
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db_printf("%sSS_PROTOREF", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_soqstate(int so_qstate)
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{
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int comma;
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comma = 0;
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if (so_qstate & SQ_INCOMP) {
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db_printf("%sSQ_INCOMP", comma ? ", " : "");
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comma = 1;
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}
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if (so_qstate & SQ_COMP) {
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db_printf("%sSQ_COMP", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_sbstate(short sb_state)
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{
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int comma;
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comma = 0;
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if (sb_state & SBS_CANTSENDMORE) {
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db_printf("%sSS_CANTSENDMORE", comma ? ", " : "");
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comma = 1;
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}
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if (sb_state & SBS_CANTRCVMORE) {
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db_printf("%sSS_CANTRCVMORE", comma ? ", " : "");
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comma = 1;
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}
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if (sb_state & SBS_RCVATMARK) {
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db_printf("%sSS_RCVATMARK", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_indent(int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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db_printf(" ");
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}
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static void
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db_print_domain(struct domain *d, const char *domainname, int indent)
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{
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db_print_indent(indent);
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db_printf("%s at %p\n", domainname, d);
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indent += 2;
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db_print_indent(indent);
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db_printf("dom_family: %d ", d->dom_family);
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db_printf("dom_name: %s\n", d->dom_name);
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db_print_indent(indent);
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db_printf("dom_init: %p ", d->dom_init);
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db_printf("dom_externalize: %p ", d->dom_externalize);
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db_printf("dom_dispose: %p\n", d->dom_dispose);
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db_print_indent(indent);
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db_printf("dom_protosw: %p ", d->dom_protosw);
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db_printf("dom_next: %p\n", d->dom_next);
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db_print_indent(indent);
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db_printf("dom_rtattach: %p ", d->dom_rtattach);
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db_printf("dom_rtoffset: %d ", d->dom_rtoffset);
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db_printf("dom_maxrtkey: %d\n", d->dom_maxrtkey);
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db_print_indent(indent);
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db_printf("dom_ifattach: %p ", d->dom_ifattach);
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db_printf("dom_ifdetach: %p\n", d->dom_ifdetach);
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}
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static void
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db_print_prflags(short pr_flags)
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{
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int comma;
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comma = 0;
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if (pr_flags & PR_ATOMIC) {
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db_printf("%sPR_ATOMIC", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_ADDR) {
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db_printf("%sPR_ADDR", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_CONNREQUIRED) {
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db_printf("%sPR_CONNREQUIRED", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_WANTRCVD) {
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db_printf("%sPR_WANTRCVD", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_RIGHTS) {
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db_printf("%sPR_RIGHTS", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_IMPLOPCL) {
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db_printf("%sPR_IMPLOPCL", comma ? ", " : "");
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comma = 1;
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}
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if (pr_flags & PR_LASTHDR) {
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db_printf("%sPR_LASTHDR", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_protosw(struct protosw *pr, const char *prname, int indent)
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{
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db_print_indent(indent);
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db_printf("%s at %p\n", prname, pr);
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indent += 2;
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db_print_indent(indent);
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db_printf("pr_type: %d ", pr->pr_type);
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db_printf("pr_domain: %p\n", pr->pr_domain);
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if (pr->pr_domain != NULL)
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db_print_domain(pr->pr_domain, "pr_domain", indent);
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db_print_indent(indent);
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db_printf("pr_protocol: %d\n", pr->pr_protocol);
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db_print_indent(indent);
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db_printf("pr_flags: %d (", pr->pr_flags);
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db_print_prflags(pr->pr_flags);
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db_printf(")\n");
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db_print_indent(indent);
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db_printf("pr_input: %p ", pr->pr_input);
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db_printf("pr_output: %p ", pr->pr_output);
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db_printf("pr_ctlinput: %p\n", pr->pr_ctlinput);
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db_print_indent(indent);
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db_printf("pr_ctloutput: %p ", pr->pr_ctloutput);
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db_printf("pr_ousrreq: %p ", pr->pr_ousrreq);
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db_printf("pr_init: %p\n", pr->pr_init);
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db_print_indent(indent);
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db_printf("pr_fasttimo: %p ", pr->pr_fasttimo);
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db_printf("pr_slowtimo: %p ", pr->pr_slowtimo);
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db_printf("pr_drain: %p\n", pr->pr_drain);
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db_print_indent(indent);
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db_printf("pr_ousrreq: %p\n", pr->pr_ousrreq);
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}
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static void
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db_print_sbflags(short sb_flags)
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{
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int comma;
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comma = 0;
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if (sb_flags & SB_WAIT) {
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db_printf("%sSB_WAIT", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_SEL) {
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db_printf("%sSB_SEL", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_ASYNC) {
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db_printf("%sSB_ASYNC", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_UPCALL) {
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db_printf("%sSB_UPCALL", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_NOINTR) {
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db_printf("%sSB_NOINTR", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_AIO) {
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db_printf("%sSB_AIO", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_KNOTE) {
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db_printf("%sSB_KNOTE", comma ? ", " : "");
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comma = 1;
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}
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if (sb_flags & SB_AUTOSIZE) {
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db_printf("%sSB_AUTOSIZE", comma ? ", " : "");
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comma = 1;
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}
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}
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static void
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db_print_sockbuf(struct sockbuf *sb, const char *sockbufname, int indent)
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{
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db_print_indent(indent);
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db_printf("%s at %p\n", sockbufname, sb);
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indent += 2;
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db_print_indent(indent);
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db_printf("sb_state: 0x%x (", sb->sb_state);
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db_print_sbstate(sb->sb_state);
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db_printf(")\n");
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db_print_indent(indent);
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db_printf("sb_mb: %p ", sb->sb_mb);
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db_printf("sb_mbtail: %p ", sb->sb_mbtail);
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db_printf("sb_lastrecord: %p\n", sb->sb_lastrecord);
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db_print_indent(indent);
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db_printf("sb_cc: %d ", sb->sb_cc);
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db_printf("sb_hiwat: %d ", sb->sb_hiwat);
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db_printf("sb_mbcnt: %d ", sb->sb_mbcnt);
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db_printf("sb_mbmax: %d\n", sb->sb_mbmax);
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db_print_indent(indent);
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db_printf("sb_ctl: %d ", sb->sb_ctl);
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db_printf("sb_lowat: %d ", sb->sb_lowat);
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db_printf("sb_timeo: %d\n", sb->sb_timeo);
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db_print_indent(indent);
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db_printf("sb_flags: 0x%x (", sb->sb_flags);
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db_print_sbflags(sb->sb_flags);
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db_printf(")\n");
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}
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static void
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db_print_socket(struct socket *so, const char *socketname, int indent)
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{
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db_print_indent(indent);
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db_printf("%s at %p\n", socketname, so);
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indent += 2;
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db_print_indent(indent);
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db_printf("so_count: %d ", so->so_count);
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db_printf("so_type: %d (", so->so_type);
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db_print_sotype(so->so_type);
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db_printf(")\n");
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db_print_indent(indent);
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db_printf("so_options: 0x%x (", so->so_options);
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db_print_sooptions(so->so_options);
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db_printf(")\n");
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db_print_indent(indent);
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db_printf("so_linger: %d ", so->so_linger);
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db_printf("so_state: 0x%x (", so->so_state);
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db_print_sostate(so->so_state);
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db_printf(")\n");
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db_print_indent(indent);
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db_printf("so_qstate: 0x%x (", so->so_qstate);
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db_print_soqstate(so->so_qstate);
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db_printf(") ");
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db_printf("so_pcb: %p ", so->so_pcb);
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db_printf("so_proto: %p\n", so->so_proto);
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if (so->so_proto != NULL)
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db_print_protosw(so->so_proto, "so_proto", indent);
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db_print_indent(indent);
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db_printf("so_head: %p ", so->so_head);
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db_printf("so_incomp first: %p ", TAILQ_FIRST(&so->so_incomp));
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db_printf("so_comp first: %p\n", TAILQ_FIRST(&so->so_comp));
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db_print_indent(indent);
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/* so_list skipped */
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db_printf("so_qlen: %d ", so->so_qlen);
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db_printf("so_incqlen: %d ", so->so_incqlen);
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db_printf("so_qlimit: %d ", so->so_qlimit);
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db_printf("so_timeo: %d ", so->so_timeo);
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db_printf("so_error: %d\n", so->so_error);
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db_print_indent(indent);
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db_printf("so_sigio: %p ", so->so_sigio);
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db_printf("so_oobmark: %lu ", so->so_oobmark);
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db_printf("so_aiojobq first: %p\n", TAILQ_FIRST(&so->so_aiojobq));
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db_print_sockbuf(&so->so_rcv, "so_rcv", indent);
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db_print_sockbuf(&so->so_snd, "so_snd", indent);
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}
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DB_SHOW_COMMAND(socket, db_show_socket)
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|
{
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struct socket *so;
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|
|
if (!have_addr) {
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db_printf("usage: show socket <addr>\n");
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return;
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}
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so = (struct socket *)addr;
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db_print_socket(so, "socket", 0);
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}
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DB_SHOW_COMMAND(sockbuf, db_show_sockbuf)
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{
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struct sockbuf *sb;
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|
if (!have_addr) {
|
|
db_printf("usage: show sockbuf <addr>\n");
|
|
return;
|
|
}
|
|
sb = (struct sockbuf *)addr;
|
|
|
|
db_print_sockbuf(sb, "sockbuf", 0);
|
|
}
|
|
|
|
DB_SHOW_COMMAND(protosw, db_show_protosw)
|
|
{
|
|
struct protosw *pr;
|
|
|
|
if (!have_addr) {
|
|
db_printf("usage: show protosw <addr>\n");
|
|
return;
|
|
}
|
|
pr = (struct protosw *)addr;
|
|
|
|
db_print_protosw(pr, "protosw", 0);
|
|
}
|
|
|
|
DB_SHOW_COMMAND(domain, db_show_domain)
|
|
{
|
|
struct domain *d;
|
|
|
|
if (!have_addr) {
|
|
db_printf("usage: show protosw <addr>\n");
|
|
return;
|
|
}
|
|
d = (struct domain *)addr;
|
|
|
|
db_print_domain(d, "domain", 0);
|
|
}
|
|
#endif
|