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Date: Sun, 04 Nov 2001 00:35:46 +0100
From: Trond Davidsen <trond.davidsen@ii.uib.no>
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To: Archie Cobbs <archie@dellroad.org>
Cc: freebsd-net@FreeBSD.ORG
Subject: Re: Mpd with a large number, 200+ , of bundles
References: <200111031831.fA3IVl424031@arch20m.dellroad.org>
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Archie Cobbs wrote:
>
> I think this error must be coming from the socket code. I wonder
> if increasing the receive buffer size on the netgraph socket would
> help.. try this patch for example:
>
> Index: main.c
> ===================================================================
> RCS file: /home/cvs/freebsd/src/usr.sbin/ngctl/main.c,v
> retrieving revision 1.4.2.3
> diff -u -r1.4.2.3 main.c
> --- main.c 2001/01/09 06:52:25 1.4.2.3
> +++ main.c 2001/11/03 18:29:33
> @@ -145,6 +145,13 @@
> if (NgMkSockNode(name, &csock, &dsock) < 0)
> err(EX_OSERR, "can't create node");
>
> + {
> + int size = 128 * 1024;
> +
> + if (setsockopt(csock, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)) == -1)
> + err(1, "setsockopt");
> + }
> +
> /* Do commands as requested */
> if (ac == 0) {
> if (fp != NULL) {
>
>
After applying this patch, running 'ngctl list' lists bundles 240 - 160:
[removed lots of output]
Name: mpd-pptp160 Type: ppp ID: 00000330 Num hooks: 6
Name: ng170 Type: iface ID: 0000032f Num hooks: 1
Name: <unnamed> Type: socket ID: 0000032e Num hooks: 2
Name: <unnamed> Type: vjc ID: 0000032d Num hooks: 4
Name: <unnamed> Type: bpf ID: 0000032c Num hooks: 3
Name: fxp0 Type: ether ID: 00000001 Num hooks: 0
ngctl: send msg: No such file or directory
vpn-gw3#
Running 'ngctl -d list' lists bundles 240 - 160:
[removed lots of output]
Name: mpd-pptp160 Type: ppp ID: 00000330 Num hooks: 6
Name: ng170 Type: iface ID: 0000032f Num hooks: 1
Name: <unnamed> Type: socket ID: 0000032e Num hooks: 2
Name: <unnamed> Type: vjc ID: 0000032d Num hooks: 4
Name: <unnamed> Type: bpf ID: 0000032c Num hooks: 3
Name: fxp0 Type: ether ID: 00000001 Num hooks: 0
ngctl: sendto([bfbffbf8]:): No such file or directory
ngctl: send msg: No such file or directory
vpn-gw3#
Running 'ngctl -dd list' fills the screen with message dumps, and ends
with 'Bus error (core dumped)', gdb shows this:
[removed lots of output]
Program received signal SIGBUS, Bus error.
0x2806a12e in _NgDebugBytes () from /usr/lib/libnetgraph.so.1
(gdb) bt
#0 0x2806a12e in _NgDebugBytes () from /usr/lib/libnetgraph.so.1
#1 0x2806a051 in _NgDebugMsg () from /usr/lib/libnetgraph.so.1
#2 0x2806af7b in NgRecvMsg () from /usr/lib/libnetgraph.so.1
#3 0x804a791 in ListCmd (ac=0, av=0xbfbfca5c)
at /usr/src/usr.sbin/ngctl/list.c:93
#4 0x80495d2 in DoCommand (ac=1, av=0xbfbfca58)
at /usr/src/usr.sbin/ngctl/main.c:306
#5 0x804956e in DoParseCommand (line=0xbfbfd2f8 "list")
at /usr/src/usr.sbin/ngctl/main.c:290
#6 0x804949b in DoInteractive () at /usr/src/usr.sbin/ngctl/main.c:268
#7 0x8048e47 in main (ac=0, av=0xbfbffc30)
at /usr/src/usr.sbin/ngctl/main.c:160
#8 0x8048b81 in _start ()
(gdb)
Trond
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