On Mar 7, 2014, at 1:23 , hiren panchasara <hiren.panchas...@gmail.com> wrote:
> I am thinking of committing following change that includes port number
> in "Listen queue overflow" messages.
>
I like it.
Best,
George
> New message would look something like:
> sonewconn: pcb 0xfffff8001b155760: Listen queue overflow on port
> 13120: 1 already in queue awaiting acceptance (454 occurrences)
>
> I've recently ran into a situation at $work where I could not catch
> the culprit application via "netstat -A" and had to dive into kgdb to
> find the port from pcb where this application was listening to.
>
> IMO, this change will make debugging easier.
>
> cheers,
> Hiren
>
> Index: sys/kern/uipc_socket.c
> ===================================================================
> --- sys/kern/uipc_socket.c (revision 262861)
> +++ sys/kern/uipc_socket.c (working copy)
> @@ -136,6 +136,7 @@
> #include <sys/jail.h>
> #include <sys/syslog.h>
> #include <netinet/in.h>
> +#include <netinet/in_pcb.h>
>
> #include <net/vnet.h>
>
> @@ -491,8 +492,11 @@
> static int overcount;
>
> struct socket *so;
> + struct inpcb *inp;
> int over;
>
> + inp = sotoinpcb(head);
> +
> ACCEPT_LOCK();
> over = (head->so_qlen > 3 * head->so_qlimit / 2);
> ACCEPT_UNLOCK();
> @@ -504,10 +508,12 @@
> overcount++;
>
> if (ratecheck(&lastover, &overinterval)) {
> - log(LOG_DEBUG, "%s: pcb %p: Listen queue overflow: "
> - "%i already in queue awaiting acceptance "
> + log(LOG_DEBUG, "%s: pcb %p: Listen queue overflow on "
> + "port %d: %i already in queue awaiting acceptance
> "
> "(%d occurrences)\n",
> - __func__, head->so_pcb, head->so_qlen, overcount);
> + __func__, head->so_pcb,
> + ntohs(inp->inp_inc.inc_lport), head->so_qlen,
> + overcount);
>
> overcount = 0;
> }
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