On 12:41 Fri 06 Nov , Michael Reed wrote:
> opensm enters an uninterruptible loop when the user enters
> "-g 0" on the command line. The only way to kill opensm is to
> background the process and send "kill -9".
The reason is that the port chooser is running in code section where all
signals are blocked. Which is bad in general, but resulted by not
perfect opensm/vendor/complid inter dependencies: sub threads are
activated (complib_init(), osm_opensm_init(), osm_opensm_bind()) with
blocked signals. The port chooser should run in the middle of this chain
after opensm vendor initialization (osm_opensm_init()), but before opensm
vendor binding (osm_opensm_bind()) - it requires a GUID value.
I don't immediately know how to improve this without significant
complib/vendor/opensm interfaces changing.
> This patch provides the user an out in get_port_guid() by
> introducing "0" as a valid selection. This patch also changes
> the "Lame choice!" error message to something a bit more, uh,
> "professional". main() is modified to test the return code.
> This was probably a bug as a return of 0 is returned under a
> number of different circumstances by get_port_guid().
>
> Applies to 1.15 RC2.
Please next time generate patch against the current master branch.
> Signed-off-by: Michael Reed <m...@sgi.com>
Applied with minor change (see below). Thanks.
>
>
> --- /tmp/OFED-1.5-rc2/main.c 2009-11-06 08:56:59.089100487 -0800
> +++ opensm/main.c 2009-11-06 09:42:34.698963811 -0800
> @@ -434,15 +434,19 @@ static ib_net64_t get_port_guid(IN osm_o
> i + 1, cl_ntoh64(attr_array[i].port_guid),
> attr_array[i].lid,
> ib_get_port_state_str(attr_array[i].link_state));
> - printf("\nEnter choice (1-%u): ", i);
> + printf("\n\t0: Exit\n");
> + printf("\nEnter choice (0-%u): ", i);
> fflush(stdout);
> if (scanf("%u", &choice) <= 0) {
> char junk[128];
> if (scanf("%s", junk) <= 0)
> printf("\nError: Cannot scan!\n");
> - } else if (choice && choice <= num_ports)
> + }
> + else if (choice == 0)
> + return (0);
> + else if (choice <= num_ports)
> break;
> - printf("\nError: Lame choice!\n");
> + printf("\nError: Please try again.\n");
"Try again" is good, but it is useful to provide a reason too, so let's
do it even more "professional":
printf("\nError: Lame choice! Please try again.\n");
Sasha
> }
> choice--;
> printf("Choice guid=0x%" PRIx64 "\n",
> @@ -1039,6 +1043,9 @@ int main(int argc, char *argv[])
> if (opt.guid == 0 || cl_hton64(opt.guid) == CL_HTON64(INVALID_GUID))
> opt.guid = get_port_guid(&osm, opt.guid);
>
> + if (opt.guid == 0)
> + goto Exit;
> +
> status = osm_opensm_bind(&osm, opt.guid);
> if (status != IB_SUCCESS) {
> printf("\nError from osm_opensm_bind (0x%X)\n", status);
> --
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