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/*
* Copyright (C) 2007 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Author: Adrian Hunter
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "tests.h"
#define MAX_ORPHANS 1000000
void orph(void)
{
pid_t pid;
unsigned i, j, k, n;
int fd, done, full;
int64_t repeat;
ssize_t sz;
char dir_name[256];
int fds[MAX_ORPHANS];
/* Create a directory to test in */
pid = getpid();
tests_cat_pid(dir_name, "orph_test_dir_", pid);
if (chdir(dir_name) == -1)
CHECK(mkdir(dir_name, 0777) != -1);
CHECK(chdir(dir_name) != -1);
repeat = tests_repeat_parameter;
for (;;) {
full = 0;
done = 0;
n = 0;
while (n + 100 < MAX_ORPHANS && !done) {
/* Make 100 more orphans */
for (i = 0; i < 100; i++) {
fd = tests_create_orphan(n + i);
if (fd < 0) {
done = 1;
if (errno == ENOSPC)
full = 1;
else if (errno != EMFILE)
CHECK(0);
errno = 0;
break;
}
fds[n + i] = fd;
}
if (!full) {
/* Write to orphans just created */
k = i;
for (i = 0; i < k; i++) {
if (tests_write_fragment_file(n + i,
fds[n+i],
0, 1000)
!= 1000) {
/*
* Out of space, so close
* remaining files
*/
for (j = i; j < k; j++)
CHECK(close(fds[n + j])
!= -1);
done = 1;
break;
}
}
}
if (!done)
CHECK(tests_count_files_in_dir(".") == 0);
n += i;
}
/* Check the data in the files */
for (i = 0; i < n; i++)
tests_check_fragment_file_fd(i, fds[i]);
if (!full && n) {
/* Ensure the file system is full */
n -= 1;
do {
sz = write(fds[n], fds, 4096);
if (sz == -1 && errno == ENOSPC) {
errno = 0;
break;
}
CHECK(sz >= 0);
} while (sz == 4096);
CHECK(close(fds[n]) != -1);
}
/* Check the data in the files */
for (i = 0; i < n; i++)
tests_check_fragment_file_fd(i, fds[i]);
/* Sleep */
if (tests_sleep_parameter > 0) {
unsigned us = tests_sleep_parameter * 1000;
unsigned rand_divisor = RAND_MAX / us;
unsigned s = (us / 2) + (rand() / rand_divisor);
usleep(s);
}
/* Close orphans */
for (i = 0; i < n; i++)
CHECK(close(fds[i]) != -1);
/* Break if repeat count exceeded */
if (tests_repeat_parameter > 0 && --repeat <= 0)
break;
}
CHECK(tests_count_files_in_dir(".") == 0);
CHECK(chdir("..") != -1);
CHECK(rmdir(dir_name) != -1);
}
/* Title of this test */
const char *orph_get_title(void)
{
return "Create many open unlinked files";
}
/* Description of this test */
const char *orph_get_description(void)
{
return
"Create a directory named orph_test_dir_pid, where " \
"pid is the process id. Within that directory, " \
"create files and keep them open and unlink them. " \
"Create as many files as possible until the file system is " \
"full or the maximum allowed open files is reached. " \
"If a sleep value is specified, the process sleeps. " \
"The sleep value is given by the -p or --sleep option, " \
"otherwise it defaults to 0. " \
"Sleep is specified in milliseconds. " \
"Then close the files. " \
"If a repeat count is specified, then the task repeats " \
"that number of times. " \
"The repeat count is given by the -n or --repeat option, " \
"otherwise it defaults to 1. " \
"A repeat count of zero repeats forever. " \
"Finally remove the directory.";
}
int main(int argc, char *argv[])
{
int run_test;
/* Set default test repetition */
tests_repeat_parameter = 1;
/* Set default test sleep */
tests_sleep_parameter = 0;
/* Handle common arguments */
run_test = tests_get_args(argc, argv, orph_get_title(),
orph_get_description(), "nps");
if (!run_test)
return 1;
/* Change directory to the file system and check it is ok for testing */
tests_check_test_file_system();
/* Do the actual test */
orph();
return 0;
}
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