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-rw-r--r--tests/fs-tests/stress/atoms/rndwrite00.c201
1 files changed, 201 insertions, 0 deletions
diff --git a/tests/fs-tests/stress/atoms/rndwrite00.c b/tests/fs-tests/stress/atoms/rndwrite00.c
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+++ b/tests/fs-tests/stress/atoms/rndwrite00.c
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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 <limits.h>
+
+#include "tests.h"
+
+#define BLOCK_SIZE 32768
+#define BUFFER_SIZE 32768
+
+static void check_file(int fd, char *data, size_t length)
+{
+ size_t n, i;
+ char buf[BUFFER_SIZE];
+
+ CHECK(lseek(fd, 0, SEEK_SET) != -1);
+ n = 0;
+ for (;;) {
+ i = read(fd, buf, BUFFER_SIZE);
+ CHECK(i >= 0);
+ if (i == 0)
+ break;
+ CHECK(memcmp(buf, data + n, i) == 0);
+ n += i;
+ }
+ CHECK(n == length);
+}
+
+void rndwrite00(void)
+{
+ int fd;
+ pid_t pid;
+ ssize_t written;
+ size_t remains;
+ size_t block;
+ size_t actual_size;
+ size_t check_every;
+ char *data, *p, *q;
+ off_t offset;
+ size_t size;
+ int64_t repeat;
+ char file_name[256];
+ char buf[4096];
+
+ /* Create file */
+ pid = getpid();
+ tests_cat_pid(file_name, "rndwrite00_test_file_", pid);
+ fd = open(file_name, O_CREAT | O_RDWR | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+ CHECK(fd != -1);
+ /* Allocate memory to hold file data */
+ CHECK(tests_size_parameter > 0);
+ CHECK(tests_size_parameter <= SIZE_MAX);
+ data = (char *) malloc(tests_size_parameter);
+ CHECK(data != NULL);
+ /* Fill with random data */
+ srand(pid);
+ for (p = data, q = data + tests_size_parameter; p != q; ++p)
+ *p = rand();
+ /* Write to file */
+ p = data;
+ remains = tests_size_parameter;
+ while (remains > 0) {
+ if (remains > BLOCK_SIZE)
+ block = BLOCK_SIZE;
+ else
+ block = remains;
+ written = write(fd, p, block);
+ if (written <= 0) {
+ CHECK(errno == ENOSPC); /* File system full */
+ errno = 0;
+ break;
+ }
+ remains -= written;
+ p += written;
+ }
+ actual_size = p - data;
+ /* Repeating bit */
+ repeat = tests_repeat_parameter;
+ check_every = actual_size / 8192;
+ for (;;) {
+ offset = tests_random_no(actual_size);
+ size = tests_random_no(4096);
+ /* Don't change the file size */
+ if (offset + size > actual_size)
+ size = actual_size - offset;
+ if (!size)
+ continue;
+ for (p = buf, q = p + size; p != q; ++p)
+ *p = rand();
+ CHECK(lseek(fd, offset, SEEK_SET) != -1);
+ written = write(fd, buf, size);
+ if (written <= 0) {
+ CHECK(errno == ENOSPC); /* File system full */
+ errno = 0;
+ } else
+ memcpy(data + offset, buf, written);
+ /* Break if repeat count exceeded */
+ if (tests_repeat_parameter > 0 && --repeat <= 0)
+ break;
+ if (repeat % check_every == 0)
+ check_file(fd, data, actual_size);
+ /* 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);
+ }
+ }
+ /* Check and close file */
+ check_file(fd, data, actual_size);
+ CHECK(close(fd) != -1);
+ if (tests_delete_flag)
+ CHECK(unlink(file_name) != -1);
+}
+
+/* Title of this test */
+
+const char *rndwrite00_get_title(void)
+{
+ return "Randomly write a large test file";
+}
+
+/* Description of this test */
+
+const char *rndwrite00_get_description(void)
+{
+ return
+ "Create a file named rndwrite00_test_file_pid, where " \
+ "pid is the process id. " \
+ "The file is filled with random data. " \
+ "The size of the file is given by the -z or --size option, " \
+ "otherwise it defaults to 1000000. " \
+ "Then a randomly sized block of random data is written at a " \
+ "random location in the file. "\
+ "The block size is always in the range 1 to 4095. " \
+ "If a sleep value is specified, the process sleeps. " \
+ "The number of writes is given by the repeat count. " \
+ "The repeat count is set by the -n or --repeat option, " \
+ "otherwise it defaults to 10000. " \
+ "A repeat count of zero repeats forever. " \
+ "The sleep value is given by the -p or --sleep option, " \
+ "otherwise it defaults to 0. "
+ "Sleep is specified in milliseconds. " \
+ "Periodically the data in the file is checked with a copy " \
+ "held in memory. " \
+ "If the delete option is specified the file is finally " \
+ "deleted.";
+}
+
+int main(int argc, char *argv[])
+{
+ int run_test;
+
+ /* Set default test file size */
+ tests_size_parameter = 1000000;
+
+ /* Set default test repetition */
+ tests_repeat_parameter = 10000;
+
+ /* Set default test sleep */
+ tests_sleep_parameter = 0;
+
+ /* Handle common arguments */
+ run_test = tests_get_args(argc, argv, rndwrite00_get_title(),
+ rndwrite00_get_description(), "zne");
+ 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 */
+ rndwrite00();
+ return 0;
+}