/*
* Read bootenv from ubi volume
*/
static int
ubi_read_bootenv(uint32_t devno, uint32_t id, bootenv_t env)
{
libubi_t ulib;
int rc = 0;
char path[PATH_MAX];
FILE* fp_in = NULL;
ulib = libubi_open();
if (ulib == NULL) {
err_msg("Cannot allocate ubi structure\n");
return -1;
}
snprintf(path, PATH_MAX, DEFAULT_VOL_PATTERN, devno, id);
fp_in = fopen(path, "r");
if (fp_in == NULL) {
err_msg("Cannot open volume:%d number:%d\n", devno, id);
goto err;
}
rc = bootenv_read(fp_in, env, BOOTENV_MAXSIZE);
if (rc != 0) {
err_msg("Cannot read volume:%d number:%d\n", devno, id);
goto err;
}
err:
if (fp_in)
fclose(fp_in);
libubi_close(ulib);
return rc;
}
/**
* read_bootenv_volume - reads the current bootenv data from id into be_old
* @devno UBI device number
* @id UBI volume id to remove
* @bootenv_old to hold old boot_env data
*
* Error handling:
* when UBI system couldn't be opened
* - returns -PFIFLASH_ERR_UBI_OPEN, err_buf matches text to err
* when UBI system couldn't open a volume to read
* - returns -PFIFLASH_ERR_UBI_VOL_FOPEN, err_buf matches text to err
* when couldn't read bootenv data
* - returns -PFIFLASH_ERR_BOOTENV_READ, err_buf matches text to err
**/
static int
read_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
char *err_buf, size_t err_buf_size)
{
int rc;
FILE* fp_in;
ubi_lib_t ulib;
rc = 0;
fp_in = NULL;
ulib = NULL;
rc = ubi_open(&ulib);
if (rc != 0) {
rc = -PFIFLASH_ERR_UBI_OPEN;
EBUF(PFIFLASH_ERRSTR[-rc]);
goto err;
}
fp_in = ubi_vol_fopen_read(ulib, devno, id);
if (!fp_in) {
rc = -PFIFLASH_ERR_UBI_VOL_FOPEN;
EBUF(PFIFLASH_ERRSTR[-rc], id);
goto err;
}
log_msg("[ reading old bootenvs ...");
/* Save old bootenvs for reference */
rc = bootenv_read(fp_in, bootenv_old, BOOTENV_MAXSIZE);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_READ;
EBUF(PFIFLASH_ERRSTR[-rc]);
goto err;
}
err:
if (fp_in)
fclose(fp_in);
if (ulib)
ubi_close(&ulib);
return rc;
}
static int
read_bootenv(const char* file, bootenv_t env)
{
int rc = 0;
FILE* fp_in = NULL;
fp_in = fopen(file, "rb");
if (fp_in == NULL) {
err_msg("Cannot open file: %s\n", file);
return -EIO;
}
rc = bootenv_read(fp_in, env, BOOTENV_MAXSIZE);
if (rc != 0) {
err_msg("Cannot read bootenv from file %s. rc: %d\n",
file, rc);
goto err;
}
err:
fclose(fp_in);
return rc;
}
static int compare_bootenv(FILE *fp_pfi, FILE **fp_flash, uint32_t ids_size,
uint32_t data_size, pdd_func_t pdd_f, char *err_buf,
size_t err_buf_size)
{
int rc, warnings = 0;
unsigned int i;
bootenv_t bootenv_pfi, bootenv_res = NULL, bootenv_flash = NULL;
rc = bootenv_create(&bootenv_pfi);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_CREATE;
goto err;
}
rc = bootenv_create(&bootenv_res);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_CREATE;
goto err;
}
rc = bootenv_read(fp_pfi, bootenv_pfi, data_size);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_READ;
goto err;
}
for (i = 0; i < ids_size; i++) {
rc = bootenv_create(&bootenv_flash);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_CREATE;
goto err;
}
rc = bootenv_read(fp_flash[i], bootenv_flash, BOOTENV_MAXSIZE);
if (rc != 0) {
rc = -PFIFLASH_ERR_BOOTENV_READ;
goto err;
}
rc = pdd_f(bootenv_flash, bootenv_pfi, &bootenv_res,
&warnings, err_buf, err_buf_size);
if (rc != 0) {
rc = -PFIFLASH_ERR_PDD_UNKNOWN;
goto err;
}
rc = bootenv_compare(bootenv_flash, bootenv_res);
if (rc > 0) {
rc = -PFIFLASH_CMP_DIFF;
goto err;
} else if (rc < 0) {
rc = -PFIFLASH_ERR_COMPARE;
goto err;
}
bootenv_destroy(&bootenv_flash);
bootenv_flash = NULL;
}
err:
if (bootenv_pfi)
bootenv_destroy(&bootenv_pfi);
if (bootenv_res)
bootenv_destroy(&bootenv_res);
if (bootenv_flash)
bootenv_destroy(&bootenv_flash);
return rc;
}