niobe/third_party/mtd-utils/tests/ubi-tests/io_read.c

404 lines
8.7 KiB
C

/*
* Copyright (c) International Business Machines Corp., 2006
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Artem B. Bityutskiy
*
* Test UBI volume read.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "libubi.h"
#define PROGRAM_NAME "io_basic"
#include "common.h"
#include "helpers.h"
static libubi_t libubi;
static struct ubi_dev_info dev_info;
const char *node;
static int fd;
/* Data lengthes to test, @io - minimal I/O unit size, @s - eraseblock size */
#define LENGTHES(io, s) \
{1, (io), (io)+1, 2*(io), 3*(io)-1, 3*(io), \
MAX_NAND_PAGE_SIZE-1, MAX_NAND_PAGE_SIZE-(io), 2*MAX_NAND_PAGE_SIZE, 2*MAX_NAND_PAGE_SIZE-(io), \
(s)/2-1, (s)/2, (s)/2+1, (s)-1, (s), (s)+1, 2*(s)-(io), 2*(s), \
2*(s)+(io), 3*(s), 3*(s)+(io)};
/*
* Offsets to test, @io - minimal I/O unit size, @s - eraseblock size, @sz -
* volume size.
*/
#define OFFSETS(io, s, sz) \
{0, (io)-1, (io), (io)+1, 2*(io)-1, 2*(io), 3*(io)-1, 3*(io), \
MAX_NAND_PAGE_SIZE-1, MAX_NAND_PAGE_SIZE-(io), 2*MAX_NAND_PAGE_SIZE, 2*MAX_NAND_PAGE_SIZE-(io), \
(s)/2-1, (s)/2, (s)/2+1, (s)-1, (s), (s)+1, 2*(s)-(io), 2*(s), \
2*(s)+(io), 3*(s), (sz)-(s)-1, (sz)-(io)-1, (sz)-MAX_NAND_PAGE_SIZE-1};
/**
* test_static - test static volume-specific features.
*
* Thus function returns %0 in case of success and %-1 in case of failure.
*/
static int test_static(void)
{
struct ubi_mkvol_request req;
const char *name = PROGRAM_NAME ":io_basic()";
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
struct ubi_vol_info vol_info;
int fd, ret;
char buf[20];
req.vol_id = UBI_VOL_NUM_AUTO;
req.alignment = 1;
req.bytes = dev_info.avail_bytes;
req.vol_type = UBI_STATIC_VOLUME;
req.name = name;
if (ubi_mkvol(libubi, node, &req)) {
failed("ubi_mkvol");
return -1;
}
sprintf(vol_node, UBI_VOLUME_PATTERN, dev_info.dev_num, req.vol_id);
fd = open(vol_node, O_RDWR);
if (fd == -1) {
failed("open");
errorm("cannot open \"%s\"\n", node);
goto remove;
}
if (ubi_get_vol_info(libubi, vol_node, &vol_info)) {
failed("ubi_get_vol_info");
goto close;
}
/* Make sure new static volume contains no data */
if (vol_info.data_bytes != 0) {
errorm("data_bytes = %lld, not zero", vol_info.data_bytes);
goto close;
}
/* Ensure read returns EOF */
ret = read(fd, buf, 1);
if (ret < 0) {
failed("read");
goto close;
}
if (ret != 0) {
errorm("read data from free static volume");
goto close;
}
if (ubi_update_start(libubi, fd, 10)) {
failed("ubi_update_start");
goto close;
}
ret = write(fd, buf, 10);
if (ret < 0) {
failed("write");
goto close;
}
if (ret != 10) {
errorm("written %d bytes", ret);
goto close;
}
if (lseek(fd, 0, SEEK_SET) != 0) {
failed("seek");
goto close;
}
ret = read(fd, buf, 20);
if (ret < 0) {
failed("read");
goto close;
}
if (ret != 10) {
errorm("read %d bytes", ret);
goto close;
}
close(fd);
if (ubi_rmvol(libubi, node, req.vol_id)) {
failed("ubi_rmvol");
return -1;
}
return 0;
close:
close(fd);
remove:
ubi_rmvol(libubi, node, req.vol_id);
return -1;
}
/*
* A helper function for test_read2().
*/
static int test_read3(const struct ubi_vol_info *vol_info, int len, off_t off)
{
int i, len1;
unsigned char *ck_buf = NULL;
unsigned char *buf = NULL;
off_t new_off;
int ret = -1;
ck_buf = malloc(len);
buf = malloc(len);
if (!ck_buf || !buf) {
failed("malloc");
goto out;
}
if (off + len > vol_info->data_bytes)
len1 = vol_info->data_bytes - off;
else
len1 = len;
if (lseek(fd, off, SEEK_SET) != off) {
failed("seek");
errorm("len = %d", len);
goto out;
}
if (read(fd, buf, len) != len1) {
failed("read");
errorm("len = %d", len);
goto out;
}
new_off = lseek(fd, 0, SEEK_CUR);
if (new_off != off + len1) {
if (new_off == -1)
failed("lseek");
else
errorm("read %d bytes from %lld, but resulting "
"offset is %lld", len1, (long long) off, (long long) new_off);
goto out;
}
for (i = 0; i < len1; i++)
ck_buf[i] = (unsigned char)(off + i);
if (memcmp(buf, ck_buf, len1)) {
errorm("incorrect data read from offset %lld",
(long long)off);
errorm("len = %d", len);
goto out;
}
ret = 0;
out:
free(buf);
free(ck_buf);
return ret;
}
/*
* A helper function for test_read1().
*/
static int test_read2(const struct ubi_vol_info *vol_info, int len)
{
int i;
off_t offsets[] = OFFSETS(dev_info.min_io_size, vol_info->leb_size,
vol_info->data_bytes);
for (i = 0; i < sizeof(offsets)/sizeof(off_t); i++) {
if (test_read3(vol_info, len, offsets[i])) {
errorm("offset = %d", offsets[i]);
return -1;
}
}
return 0;
}
/*
* A helper function for test_read().
*/
static int test_read1(struct ubi_vol_info *vol_info)
{
int i, written = 0;
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
int lengthes[] = LENGTHES(dev_info.min_io_size, vol_info->leb_size);
sprintf(vol_node, UBI_VOLUME_PATTERN, dev_info.dev_num,
vol_info->vol_id);
fd = open(vol_node, O_RDWR);
if (fd == -1) {
failed("open");
errorm("cannot open \"%s\"\n", node);
return -1;
}
/* Write some pattern to the volume */
if (ubi_update_start(libubi, fd, vol_info->rsvd_bytes)) {
failed("ubi_update_start");
errorm("bytes = %lld", vol_info->rsvd_bytes);
goto close;
}
while (written < vol_info->rsvd_bytes) {
int i, ret;
unsigned char buf[512];
for (i = 0; i < 512; i++)
buf[i] = (unsigned char)(written + i);
ret = write(fd, buf, 512);
if (ret == -1) {
failed("write");
errorm("written = %d, ret = %d", written, ret);
goto close;
}
written += ret;
}
close(fd);
if (ubi_get_vol_info(libubi, vol_node, vol_info)) {
failed("ubi_get_vol_info");
return -1;
}
fd = open(vol_node, O_RDONLY);
if (fd == -1) {
failed("open");
errorm("cannot open \"%s\"\n", node);
return -1;
}
for (i = 0; i < sizeof(lengthes)/sizeof(int); i++) {
if (test_read2(vol_info, lengthes[i])) {
errorm("length = %d", lengthes[i]);
goto close;
}
}
close(fd);
return 0;
close:
close(fd);
return -1;
}
/**
* test_read - test UBI volume reading from different offsets.
*
* @type volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
*
* Thus function returns %0 in case of success and %-1 in case of failure.
*/
static int test_read(int type)
{
const char *name = PROGRAM_NAME ":test_read()";
int alignments[] = ALIGNMENTS(dev_info.leb_size);
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
struct ubi_mkvol_request req;
int i;
for (i = 0; i < sizeof(alignments)/sizeof(int); i++) {
int leb_size;
struct ubi_vol_info vol_info;
req.vol_id = UBI_VOL_NUM_AUTO;
req.vol_type = type;
req.name = name;
req.alignment = alignments[i];
req.alignment -= req.alignment % dev_info.min_io_size;
if (req.alignment == 0)
req.alignment = dev_info.min_io_size;
leb_size = dev_info.leb_size - dev_info.leb_size % req.alignment;
req.bytes = MIN_AVAIL_EBS * leb_size;
if (ubi_mkvol(libubi, node, &req)) {
failed("ubi_mkvol");
return -1;
}
sprintf(vol_node, UBI_VOLUME_PATTERN, dev_info.dev_num,
req.vol_id);
if (ubi_get_vol_info(libubi, vol_node, &vol_info)) {
failed("ubi_get_vol_info");
goto remove;
}
if (test_read1(&vol_info)) {
errorm("alignment = %d", req.alignment);
goto remove;
}
if (ubi_rmvol(libubi, node, req.vol_id)) {
failed("ubi_rmvol");
return -1;
}
}
return 0;
remove:
ubi_rmvol(libubi, node, req.vol_id);
return -1;
}
int main(int argc, char * const argv[])
{
if (initial_check(argc, argv))
return 1;
node = argv[1];
libubi = libubi_open();
if (libubi == NULL) {
failed("libubi_open");
return 1;
}
if (ubi_get_dev_info(libubi, node, &dev_info)) {
failed("ubi_get_dev_info");
goto close;
}
if (test_static())
goto close;
if (test_read(UBI_DYNAMIC_VOLUME))
goto close;
if (test_read(UBI_STATIC_VOLUME))
goto close;
libubi_close(libubi);
return 0;
close:
libubi_close(libubi);
return 1;
}