M7350/filesystems/mtd-utils/tests/ubi-tests/io_update.c
2024-09-09 08:57:42 +00:00

300 lines
7.0 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 update and atomic LEB change
*/
#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>
#include <mtd/ubi-user.h>
#define PROGRAM_NAME "io_update"
#include "common.h"
#include "helpers.h"
static libubi_t libubi;
static struct ubi_dev_info dev_info;
const char *node;
#define SEQUENCES(io, s) { \
{3*(s)-(io)-1, 1}, \
{512}, \
{666}, \
{2048}, \
{(io), (io), PAGE_SIZE}, \
{(io)+1, (io)+1, PAGE_SIZE}, \
{PAGE_SIZE}, \
{PAGE_SIZE-1}, \
{PAGE_SIZE+(io)}, \
{(s)}, \
{(s)-1}, \
{(s)+1}, \
{(io), (s)+1}, \
{(s)+(io), PAGE_SIZE}, \
{2*(s), PAGE_SIZE}, \
{PAGE_SIZE, 2*(s), 1}, \
{PAGE_SIZE, 2*(s)}, \
{2*(s)-1, 2*(s)-1}, \
{3*(s), PAGE_SIZE + 1}, \
{1, PAGE_SIZE}, \
{(io), (s)} \
}
#define SEQ_SZ 21
/*
* test_update1 - helper function for test_update().
*/
static int test_update1(struct ubi_vol_info *vol_info, int leb_change)
{
long long total_len = leb_change ? vol_info->leb_size
: vol_info->rsvd_bytes;
int sequences[SEQ_SZ][3] = SEQUENCES(dev_info.min_io_size,
leb_change ? dev_info.min_io_size * 2
: vol_info->leb_size);
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
unsigned char buf[total_len];
int fd, i, j;
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;
}
for (i = 0; i < SEQ_SZ; i++) {
int ret, stop = 0, len = 0;
off_t off = 0;
long long test_len;
unsigned char buf1[total_len];
/*
* test_len is LEB size (if we test atomic LEB change) or
* volume size (if we test update). For better test coverage,
* use a little smaller LEB change/update length.
*/
test_len = total_len - (rand() % (total_len / 10));
if (leb_change) {
if (ubi_leb_change_start(libubi, fd, 0, test_len)) {
failed("ubi_update_start");
goto close;
}
} else {
if (ubi_update_start(libubi, fd, test_len)) {
failed("ubi_update_start");
goto close;
}
}
for (j = 0; off < test_len; j++) {
int n, rnd_len, l;
if (!stop) {
if (sequences[i][j] != 0)
l = len = sequences[i][j];
else
stop = 1;
}
/*
* Fill some part of the write buffer with random data,
* and the other part with 0xFFs to test how UBI
* stripes 0xFFs multiple of I/O unit size.
*/
if (off + l > test_len)
l = test_len - off;
rnd_len = rand() % (l + 1);
for (n = 0; n < rnd_len; n++)
buf[off + n] = (unsigned char)rand();
memset(buf + off + rnd_len, 0xFF, l - rnd_len);
/*
* Deliberately pass len instead of l (len may be
* greater then l if this is the last chunk) because
* UBI have to read only l bytes anyway.
*/
ret = write(fd, buf + off, len);
if (ret < 0) {
failed("write");
errorm("failed to write %d bytes at offset "
"%lld", len, (long long)off);
goto close;
}
len = l;
if (ret != len) {
errorm("failed to write %d bytes at offset "
"%lld, wrote %d", len, (long long)off, ret);
goto close;
}
off += len;
}
/* Check data */
if ((ret = lseek(fd, 0, SEEK_SET)) != 0) {
failed("lseek");
errorm("cannot seek to 0");
goto close;
}
memset(buf1, 0x01, test_len);
if (vol_info->type == UBI_STATIC_VOLUME)
/*
* Static volume must not let use read more then it
* contains.
*/
ret = read(fd, buf1, test_len + 100);
else
ret = read(fd, buf1, test_len);
if (ret < 0) {
failed("read");
errorm("failed to read %d bytes", test_len);
goto close;
}
if (ret != test_len) {
errorm("failed to read %d bytes, read %d", test_len, ret);
goto close;
}
if (memcmp(buf, buf1, test_len)) {
errorm("data corruption");
goto close;
}
}
close(fd);
return 0;
close:
close(fd);
return -1;
}
/**
* test_update - check volume update and atomic LEB change capabilities.
*
* @type volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
*
* This function returns %0 in case of success and %-1 in case of failure.
*/
static int test_update(int type)
{
struct ubi_mkvol_request req;
const char *name = PROGRAM_NAME ":io_update()";
int alignments[] = ALIGNMENTS(dev_info.leb_size);
struct ubi_vol_info vol_info;
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
unsigned int i;
for (i = 0; i < sizeof(alignments)/sizeof(int); i++) {
int leb_size;
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_update1(&vol_info, 0)) {
errorm("alignment = %d", req.alignment);
goto remove;
}
if (vol_info.type != UBI_STATIC_VOLUME) {
if (test_update1(&vol_info, 1)) {
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[])
{
seed_random_generator();
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_update(UBI_DYNAMIC_VOLUME))
goto close;
if (test_update(UBI_STATIC_VOLUME))
goto close;
libubi_close(libubi);
return 0;
close:
libubi_close(libubi);
return 1;
}