/**
* Read logpack header sector from log device.
*
* @fd log device fd opened.
* @super_sectp super sector.
* @lsid logpack lsid to read.
* @logh_sect buffer to store logpack header data.
* This allocated size must be sector size.
* @salt log checksum salt.
*
* RETURN:
* ture in success, or false.
*/
bool read_logpack_header_from_wldev(
int fd, const struct walb_super_sector* super_sectp,
u64 lsid, u32 salt, struct sector_data *logh_sect)
{
/* calc offset in the ring buffer */
u64 ring_buffer_offset = get_ring_buffer_offset_2(super_sectp);
u64 ring_buffer_size = super_sectp->ring_buffer_size;
u64 off = ring_buffer_offset + lsid % ring_buffer_size;
struct walb_logpack_header *logh = get_logpack_header(logh_sect);
/* read sector */
if (!sector_read(fd, off, logh_sect)) {
LOGe("read logpack header (lsid %"PRIu64") failed.\n", lsid);
return false;
}
/* check lsid */
if (lsid != logh->logpack_lsid) {
LOGe("lsid (given %"PRIu64" read %"PRIu64") is invalid.\n",
lsid, logh->logpack_lsid);
return false;
}
if (!is_valid_logpack_header_with_checksum(
logh, super_sectp->physical_bs, salt)) {
LOGe("check logpack header failed.\n");
return false;
}
return true;
}
/**
* Print super sector for debug.
* This will be obsolute. Use print_super_sector() instead.
*/
void print_super_sector_raw(const struct walb_super_sector* super_sect)
{
ASSERT(super_sect);
printf("checksum: %08x\n"
"logical_bs: %u\n"
"physical_bs: %u\n"
"metadata_size: %u\n"
"log_checksum_salt: %"PRIu32"\n",
super_sect->checksum,
super_sect->logical_bs,
super_sect->physical_bs,
super_sect->metadata_size,
super_sect->log_checksum_salt);
printf("uuid: ");
print_uuid(super_sect->uuid);
printf("\n"
"name: \"%s\"\n"
"ring_buffer_size: %lu\n"
"oldest_lsid: %lu\n"
"written_lsid: %lu\n"
"device_size: %lu\n",
super_sect->name,
super_sect->ring_buffer_size,
super_sect->oldest_lsid,
super_sect->written_lsid,
super_sect->device_size);
printf("ring_buffer_offset: %lu\n",
get_ring_buffer_offset_2(super_sect));
}
