I have trouble with C program coding. Hopefully, someone can help me online.It is about the unit and mdadm_mount, mdadm_unmount. I attached with the rubric and if u can help me please contact me.
here is the file that I have done so far:
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include “mdadm.h”
#include “jbod.h”
uint32_t encode_operation(jbod_cmd_t cmd, int disk_num, int block_num)
{
//construct op
int op;
op = cmd << 26|disk_num << 22|block_num;
return op;
}
int mdadm_mount(void) {
return -1;
}
int mdadm_unmount(void) {
return -1;
}
void translate_address(uint32_t linear_addr, int*disk_num,
int *block_num,
int *offset)
{
*disk_num = linear_addr / JBOD_DISK_SIZE;
*block_num =
*offset =
}
int seat(int disk_num, int block_num)
{
encode_operation(JBOD_SEEK_TO_DISK, disk_num, 0);
encode_operation(JBOD_SEEK_TO_BLOCK, 0, block_num);
}
int mdadm_read(uint32_t addr, uint32_t len, uint8_t *buf) {
int disk_num, block_num, offset;
translate_address(addr, &disk_num…);
seek(…);
op = encode_operation(JBOD_READ_BLOCK,0,0);
uint8_t buf[…];
jbod_operation(op,buf);
return len;
}
and this is the tester file:
here is the tester file:
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <err.h>
#include <assert.h>
#include “jbod.h”
#include “mdadm.h”
#include “util.h”
#include “tester.h”
/* Test functions. */
int test_mount_unmount();
int test_read_before_mount();
int test_read_invalid_parameters();
int test_read_within_block();
int test_read_across_blocks();
int test_read_three_blocks();
int test_read_across_disks();
/* Utility functions. */
char *stringify(uint8_t buf[], int length);
int main(int argc, char *argv[])
{
int score = 0;
score += test_mount_unmount();
score += test_read_before_mount();
score += test_read_invalid_parameters();
score += test_read_within_block();
score += test_read_across_blocks();
score += test_read_three_blocks();
score += test_read_across_disks();
printf(“Total score: %d/%dn”, score, 10);
return 0;
}
int test_mount_unmount() {
printf(“running %s: “, __func__);
int rc = mdadm_mount();
if (rc != 1) {
printf(“failed: mount should succeed on an unmounted system but it failed.n”);
return 0;
}
rc = mdadm_mount();
if (rc == 1) {
printf(“failed: mount should fail on an already mounted system but it succeeded.n”);
return 0;
}
if (rc != -1) {
printf(“failed: mount should return -1 on failure but returned %dn”, rc);
return 0;
}
rc = mdadm_unmount();
if (rc != 1) {
printf(“failed: unmount should succeed on a mounted system but it failed.n”);
return 0;
}
rc = mdadm_unmount();
if (rc == 1) {
printf(“failed: unmount should fail on an already unmounted system but it succeeded.n”);
return 0;
}
if (rc != -1) {
printf(“failed: unmount should return -1 on failure but returned %dn”, rc);
return 0;
}
printf(“passedn”);
return 3;
}
#define SIZE 16
int test_read_before_mount() {
printf(“running %s: “, __func__);
uint8_t buf[SIZE];
if (mdadm_read(0, SIZE, buf) != -1) {
printf(“failed: read should fail on an umounted system but it did not.n”);
return 0;
}
printf(“passedn”);
return 1;
}
int test_read_invalid_parameters() {
printf(“running %s: “, __func__);
mdadm_mount();
bool success = false;
uint8_t buf1[SIZE];
uint32_t addr = 0x1fffffff;
if (mdadm_read(addr, SIZE, buf1) != -1) {
printf(“failed: read should fail on an out-of-bound linear address but it did not.n”);
goto out;
}
addr = 1048570;
if (mdadm_read(addr, SIZE, buf1) != -1) {
printf(“failed: read should fail if it goes beyond the end of the linear address space but it did not.n”);
goto out;
}
uint8_t buf2[2048];
if (mdadm_read(0, sizeof(buf2), buf2) != -1) {
printf(“failed: read should fail on larger than 1024-byte I/O sizes but it did not.n”);
goto out;
}
if (mdadm_read(0, SIZE, NULL) != -1) {
printf(“failed: read should fail when passed a NULL pointer and non-zero length but it did not.n”);
goto out;
}
if (mdadm_read(0, 0, NULL) != 0) {
printf(“failed: 0-length read should succeed with a NULL pointer but it did not.n”);
goto out;
}
success = true;
out:
mdadm_unmount();
if (!success)
return 0;
printf(“passedn”);
return 1;
}
/*
* This test reads the first 16 bytes of the linear address, which corresponds
* to the first 16 bytes of the 0th block of the 0th disk.
*/
int test_read_within_block() {
printf(“running %s: “, __func__);
mdadm_mount();
/* Set the contents of JBOD drives to a specific pattern. */
jbod_initialize_drives_contents();
bool success = false;
uint8_t out[SIZE];
if (mdadm_read(0, SIZE, out) != SIZE) {
printf(“failed: read failedn”);
return 0;
}
uint8_t expected[SIZE] = {
0xaa, 0xaa, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xaa,
};
if (memcmp(out, expected, SIZE) != 0) {
char *out_s = stringify(out, SIZE);
char *expected_s = stringify(expected, SIZE);
printf(“failed:n got: %sn expected: %sn”, out_s, expected_s);
free(out_s);
free(expected_s);
goto out;
}
success = true;
out:
mdadm_unmount();
if (!success)
return 0;
printf(“passedn”);
return 1;
}
/*
* This test reads 16 bytes starting at the linear address 248, which
* corresponds to the last 8 bytes of the 0th block and first 8 bytes of the 1st
* block, both on the 0th disk.
*/
int test_read_across_blocks() {
printf(“running %s: “, __func__);
mdadm_mount();
/* Set the contents of JBOD drives to a specific pattern. */
jbod_initialize_drives_contents();
bool success = false;
uint8_t out[SIZE];
if (mdadm_read(248, SIZE, out) != SIZE) {
printf(“failed: read failedn”);
goto out;
}
uint8_t expected[SIZE] = {
0xaa, 0xaa, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xaa,
0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb,
};
if (memcmp(out, expected, SIZE) != 0) {
char *out_s = stringify(out, SIZE);
char *expected_s = stringify(expected, SIZE);
printf(“failed:n got: %sn expected: %sn”, out_s, expected_s);
free(out_s);
free(expected_s);
goto out;
}
success = true;
out:
mdadm_unmount();
if (!success)
return 0;
printf(“passedn”);
return 1;
}
/*
* This test reads 258 bytes starting at the linear address 255, which
* corresponds to the last byte of the 0th block, all bytes of the 1st block,
* and the first byte of the 2nd block, where all blocks are the 0th disk.
*/
#define TEST3_SIZE 258
int test_read_three_blocks() {
printf(“running %s: “, __func__);
mdadm_mount();
/* Set the contents of JBOD drives to a specific pattern. */
jbod_initialize_drives_contents();
bool success = false;
uint8_t out[TEST3_SIZE];
if (mdadm_read(255, TEST3_SIZE, out) != TEST3_SIZE) {
printf(“failed: read failedn”);
goto out;
}
uint8_t expected[TEST3_SIZE] = {
0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
0xbb, 0xcc,
};
if (memcmp(out, expected, TEST3_SIZE) != 0) {
char *out_s = stringify(out, TEST3_SIZE);
char *expected_s = stringify(expected, TEST3_SIZE);
printf(“failed:n got:n%sn expected:n%sn”, out_s, expected_s);
free(out_s);
free(expected_s);
goto out;
}
success = true;
out:
mdadm_unmount();
if (!success)
return 0;
printf(“passedn”);
return 1;
}
/*
* This test reads 16 bytes starting at the linear address 983032, which
* corresponds to the last 8 bytes of disk 14 and first 8 bytes on disk 15.
*/
int test_read_across_disks() {
printf(“running %s: “, __func__);
int rc = mdadm_mount();
if (rc != 1) {
printf(“failed: mount should succeed on an unmounted system but it failed.n”);
return 0;
}
/* Set the contents of JBOD drives to a specific pattern. */
jbod_initialize_drives_contents();
bool success = false;
uint8_t out[SIZE];
if (mdadm_read(983032, SIZE, out) != SIZE) {
printf(“failed: read failedn”);
goto out;
}
uint8_t expected[SIZE] = {
0xee, 0xee, 0xee, 0xee,
0xee, 0xee, 0xee, 0xee,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
};
if (memcmp(out, expected, SIZE) != 0) {
char *out_s = stringify(out, SIZE);
char *expected_s = stringify(expected, SIZE);
printf(“failed:n got:n%sn expected:n%sn”, out_s, expected_s);
free(out_s);
free(expected_s);
goto out;
}
success = true;
out:
mdadm_unmount();
if (!success)
return 0;
printf(“passedn”);
return 2;
}
char *stringify(uint8_t buf[], int length) {
char *p = (char *)malloc(length * 6);
for (int i = 0, n = 0; i < length; ++i) {
if (i && i % 16 == 0)
n += sprintf(p + n, “n”);
n += sprintf(p + n, “0x%02x “, buf[i]);
}
return p;
}
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