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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 <stdio.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "tests.h"
static void test_1(void)
{
int fd;
pid_t pid;
uint64_t i;
uint64_t block;
uint64_t actual_size;
char name[256];
char old[16];
char buf[16];
off_t old_len;
char dir_name[256];
/* Create a directory to test in */
pid = getpid();
tests_cat_pid(dir_name, "test_1_test_dir_", pid);
if (chdir(dir_name) == -1)
CHECK(mkdir(dir_name, 0777) != -1);
CHECK(chdir(dir_name) != -1);
/* Create a file that fills half the free space on the file system */
tests_create_file("big_file", tests_get_big_file_size(1,2));
CHECK(tests_count_files_in_dir(".") == 1);
fd = open("big_file", O_RDWR | tests_maybe_sync_flag());
CHECK(fd != -1);
CHECK(read(fd, old, 5) == 5);
CHECK(lseek(fd, 0, SEEK_SET) != (off_t) -1);
CHECK(write(fd,"start", 5) == 5);
CHECK(lseek(fd,0,SEEK_END) != (off_t) -1);
CHECK(write(fd, "end", 3) == 3);
tests_maybe_sync(fd);
/* Delete the file while it is still open */
tests_delete_file("big_file");
CHECK(tests_count_files_in_dir(".") == 0);
/* Create files to file up the file system */
for (block = 1000000, i = 1; ; block /= 10) {
while (i != 0) {
sprintf(name, "fill_up_%llu", (unsigned long long)i);
actual_size = tests_create_file(name, block);
if (actual_size != 0)
++i;
if (actual_size != block)
break;
}
if (block == 1)
break;
}
/* Check the big file */
CHECK(lseek(fd, 0, SEEK_SET) != (off_t) -1);
CHECK(read(fd, buf, 5) == 5);
CHECK(strncmp(buf, "start", 5) == 0);
CHECK(lseek(fd, -3, SEEK_END) != (off_t) -1);
CHECK(read(fd, buf, 3) == 3);
CHECK(strncmp(buf, "end", 3) == 0);
/* Check the other files and delete them */
i -= 1;
CHECK(tests_count_files_in_dir(".") == i);
for (; i > 0; --i) {
sprintf(name, "fill_up_%llu", (unsigned long long)i);
tests_check_filled_file(name);
tests_delete_file(name);
}
CHECK(tests_count_files_in_dir(".") == 0);
/* Check the big file again */
CHECK(lseek(fd, 0, SEEK_SET) != (off_t) -1);
CHECK(read(fd, buf, 5) == 5);
CHECK(strncmp(buf, "start", 5) == 0);
CHECK(lseek(fd, -3, SEEK_END) != (off_t) -1);
CHECK(read(fd, buf, 3) == 3);
CHECK(strncmp(buf, "end", 3) == 0);
CHECK(lseek(fd, 0, SEEK_SET) != (off_t) -1);
CHECK(write(fd,old, 5) == 5);
old_len = lseek(fd, -3, SEEK_END);
CHECK(old_len != (off_t) -1);
CHECK(ftruncate(fd,old_len) != -1);
tests_check_filled_file_fd(fd);
/* Close the big file*/
CHECK(close(fd) != -1);
CHECK(tests_count_files_in_dir(".") == 0);
CHECK(chdir("..") != -1);
CHECK(rmdir(dir_name) != -1);
}
/* Title of this test */
static const char *test_1_get_title(void)
{
return "Fill file system while holding deleted big file descriptor";
}
/* Description of this test */
static const char *test_1_get_description(void)
{
return
"Create a directory named test_1_test_dir_pid, where " \
"pid is the process id. Within that directory, " \
"create a big file (approx. half the file system in size), " \
"open it, and unlink it. " \
"Create many smaller files until the file system is full. " \
"Check the big file is ok. " \
"Delete all the smaller files. " \
"Check the big file again. " \
"Finally delete the big file and directory.";
}
int main(int argc, char *argv[])
{
int run_test;
/* Handle common arguments */
run_test = tests_get_args(argc, argv, test_1_get_title(),
test_1_get_description(), "s");
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 */
test_1();
return 0;
}
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