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/*
SMB tree connection rate test
Copyright (C) 2006-2007 James Peach
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "libcli/libcli.h"
#include "libcli/resolve/resolve.h"
#include "torture/smbtorture.h"
#include "lib/cmdline/popt_common.h"
#include "param/param.h"
#include "system/filesys.h"
#include "system/shmem.h"
#define TIME_LIMIT_SECS 30
#define usec_to_sec(s) ((s) / 1000000)
#define sec_to_usec(s) ((s) * 1000000)
/* Map a shared memory buffer of at least nelem counters. */
static void * map_count_buffer(unsigned nelem, size_t elemsz)
{
void * buf;
size_t bufsz;
size_t pagesz = getpagesize();
bufsz = nelem * elemsz;
bufsz = (bufsz + pagesz) % pagesz; /* round up to pagesz */
#ifdef MAP_ANON
/* BSD */
buf = mmap(NULL, bufsz, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED,
-1 /* fd */, 0 /* offset */);
#else
buf = mmap(NULL, bufsz, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED,
open("/dev/zero", O_RDWR), 0 /* offset */);
#endif
if (buf == MAP_FAILED) {
printf("failed to map count buffer: %s\n",
strerror(errno));
return NULL;
}
return buf;
}
static int fork_tcon_client(struct torture_context *tctx,
int *tcon_count, unsigned tcon_timelimit,
const char *host, const char *share)
{
pid_t child;
struct smbcli_state *cli;
struct timeval end;
struct timeval now;
struct smbcli_options options;
lp_smbcli_options(tctx->lp_ctx, &options);
child = fork();
if (child == -1) {
printf("failed to fork child: %s\n,", strerror(errno));
return -1;
} else if (child != 0) {
/* Parent, just return. */
return 0;
}
/* Child. Just make as many connections as possible within the
* time limit. Don't bother synchronising the child start times
* because it's probably not work the effort, and a bit of startup
* jitter is probably a more realistic test.
*/
end = timeval_current();
now = timeval_current();
end.tv_sec += tcon_timelimit;
*tcon_count = 0;
while (timeval_compare(&now, &end) == -1) {
NTSTATUS status;
status = smbcli_full_connection(NULL, &cli,
host, lp_smb_ports(tctx->lp_ctx), share,
NULL, cmdline_credentials,
lp_resolve_context(tctx->lp_ctx),
tctx->ev, &options);
if (!NT_STATUS_IS_OK(status)) {
printf("failed to connect to //%s/%s: %s\n",
host, share, nt_errstr(status));
goto done;
}
smbcli_tdis(cli);
*tcon_count = *tcon_count + 1;
now = timeval_current();
}
done:
exit(0);
}
static bool children_remain(void)
{
/* Reap as many children as possible. */
for (;;) {
pid_t ret = waitpid(-1, NULL, WNOHANG);
if (ret == 0) {
/* no children ready */
return true;
}
if (ret == -1) {
/* no children left. maybe */
return errno == ECHILD ? false : true;
}
}
/* notreached */
return false;
}
static double rate_convert_secs(unsigned count,
const struct timeval *start, const struct timeval *end)
{
return (double)count /
usec_to_sec((double)usec_time_diff(end, start));
}
/* Test the rate at which the server will accept connections. */
bool torture_bench_treeconnect(struct torture_context *tctx)
{
const char *host = torture_setting_string(tctx, "host", NULL);
const char *share = torture_setting_string(tctx, "share", NULL);
int timelimit = torture_setting_int(tctx, "timelimit",
TIME_LIMIT_SECS);
int nprocs = torture_setting_int(tctx, "nprocs", 4);
int *curr_counts = map_count_buffer(nprocs, sizeof(int));
int *last_counts = talloc_array(NULL, int, nprocs);
struct timeval now, last, start;
int i, delta;
torture_assert(tctx, nprocs > 0, "bad proc count");
torture_assert(tctx, timelimit > 0, "bad timelimit");
torture_assert(tctx, curr_counts, "allocation failure");
torture_assert(tctx, last_counts, "allocation failure");
start = last = timeval_current();
for (i = 0; i < nprocs; ++i) {
fork_tcon_client(tctx, &curr_counts[i], timelimit, host, share);
}
while (children_remain()) {
sleep(1);
now = timeval_current();
for (i = 0, delta = 0; i < nprocs; ++i) {
delta += curr_counts[i] - last_counts[i];
}
printf("%u connections/sec\n",
(unsigned)rate_convert_secs(delta, &last, &now));
memcpy(last_counts, curr_counts, nprocs * sizeof(int));
last = timeval_current();
}
now = timeval_current();
for (i = 0, delta = 0; i < nprocs; ++i) {
delta += curr_counts[i];
}
printf("TOTAL: %u connections/sec over %u secs\n",
(unsigned)rate_convert_secs(delta, &start, &now),
timelimit);
return true;
}
/* vim: set sts=8 sw=8 : */
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