static int __init pseries_nvram_init_log_partitions(void)
{
int rc;
/* Scan nvram for partitions */
nvram_scan_partitions();
rc = nvram_init_os_partition(&rtas_log_partition);
nvram_init_oops_partition(rc == 0);
return 0;
}
/* pseries_nvram_init_log_partition
*
* This will setup the partition we need for buffering the
* error logs and cleanup partitions if needed.
*
* The general strategy is the following:
* 1.) If there is log partition large enough then use it.
* 2.) If there is none large enough, search
* for a free partition that is large enough.
* 3.) If there is not a free partition large enough remove
* _all_ OS partitions and consolidate the space.
* 4.) Will first try getting a chunk that will satisfy the maximum
* error log size (NVRAM_MAX_REQ).
* 5.) If the max chunk cannot be allocated then try finding a chunk
* that will satisfy the minum needed (NVRAM_MIN_REQ).
*/
static int __init pseries_nvram_init_log_partition(void)
{
loff_t p;
int size;
/* Scan nvram for partitions */
nvram_scan_partitions();
/* Lookg for ours */
p = nvram_find_partition(NVRAM_LOG_PART_NAME, NVRAM_SIG_OS, &size);
/* Found one but too small, remove it */
if (p && size < NVRAM_MIN_REQ) {
pr_info("nvram: Found too small "NVRAM_LOG_PART_NAME" partition"
",removing it...");
nvram_remove_partition(NVRAM_LOG_PART_NAME, NVRAM_SIG_OS);
p = 0;
}
/* Create one if we didn't find */
if (!p) {
p = nvram_create_partition(NVRAM_LOG_PART_NAME, NVRAM_SIG_OS,
NVRAM_MAX_REQ, NVRAM_MIN_REQ);
/* No room for it, try to get rid of any OS partition
* and try again
*/
if (p == -ENOSPC) {
pr_info("nvram: No room to create "NVRAM_LOG_PART_NAME
" partition, deleting all OS partitions...");
nvram_remove_partition(NULL, NVRAM_SIG_OS);
p = nvram_create_partition(NVRAM_LOG_PART_NAME,
NVRAM_SIG_OS, NVRAM_MAX_REQ,
NVRAM_MIN_REQ);
}
}
if (p <= 0) {
pr_err("nvram: Failed to find or create "NVRAM_LOG_PART_NAME
" partition, err %d\n", (int)p);
return 0;
}
nvram_error_log_index = p;
nvram_error_log_size = nvram_get_partition_size(p) -
sizeof(struct err_log_info);
return 0;
}
