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/*
* stp.c - stp 'daemon'
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2005
* Copyright (C) Redhat Inc, 2005
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "librelay.h"
/* packet logging output written here, filebase0...N */
static char *stpd_outfilebase = "stpd_cpu";
#define DEFAULT_SUBBUF_SIZE (262144)
#define DEFAULT_N_SUBBUFS (4)
static unsigned subbuf_size = DEFAULT_SUBBUF_SIZE;
static unsigned n_subbufs = DEFAULT_N_SUBBUFS;
extern char *optarg;
extern int optopt;
extern int optind;
int print_only = 0;
int quiet = 0;
int streaming = 1;
/* relayfs base file name */
static char stpd_filebase[1024];
static void usage(char *prog)
{
fprintf(stderr, "%s [-p] [-q] [-b subbuf_size -n n_subbufs] kmod-name\n", prog);
fprintf(stderr, "-p Print only. Don't log to files.\n");
fprintf(stderr, "-q Quiet. Don't display trace to stdout.\n");
fprintf(stderr, "-r Use relayfs for buffering i.e. non-streaming mode.\n");
fprintf(stderr, "-b subbuf_size (default is %d)\n", DEFAULT_SUBBUF_SIZE);
fprintf(stderr, "-n subbufs (default is %d)\n", DEFAULT_N_SUBBUFS);
exit(1);
}
int main(int argc, char **argv)
{
int c;
unsigned opt_subbuf_size = 0;
unsigned opt_n_subbufs = 0;
char *modname = NULL;
while ((c = getopt(argc, argv, "b:n:pqr")) != EOF)
{
switch (c) {
case 'b':
opt_subbuf_size = (unsigned)atoi(optarg);
if (!opt_subbuf_size)
usage(argv[0]);
break;
case 'n':
opt_n_subbufs = (unsigned)atoi(optarg);
if (!opt_n_subbufs)
usage(argv[0]);
break;
case 'p':
print_only = 1;
break;
case 'q':
quiet = 1;
break;
case 'r':
streaming = 0;
break;
default:
usage(argv[0]);
}
}
if (optind < argc)
modname = argv[optind++];
if (!modname) {
fprintf (stderr, "Cannot invoke daemon without probe module\n");
usage(argv[0]);
}
if (print_only && quiet) {
fprintf (stderr, "Cannot do \"-p\" and \"-q\" both.\n");
usage(argv[0]);
}
if ((opt_n_subbufs && !opt_subbuf_size) ||
(!opt_n_subbufs && opt_subbuf_size))
usage(argv[0]);
if (opt_n_subbufs && opt_n_subbufs) {
subbuf_size = opt_subbuf_size;
n_subbufs = opt_n_subbufs;
}
sprintf(stpd_filebase, "/mnt/relay/%d/cpu", getpid());
if (init_stp(modname, stpd_filebase, stpd_outfilebase,
subbuf_size, n_subbufs, 1)) {
fprintf(stderr, "Couldn't initialize stpd. Exiting.\n");
exit(1);
}
if (!streaming)
printf("Creating channel with %u sub-buffers of size %u.\n",
n_subbufs, subbuf_size);
if (quiet)
printf("Logging... Press Control-C to stop.\n");
else
printf("Press Control-C to stop.\n");
if (stp_main_loop()) {
printf("Couldn't enter main loop. Exiting.\n");
exit(1);
}
return 0;
}
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