static int get_trunk_sha1(uint32_t epoch, unsigned char *outsha1)
{
int i, nr_logs = -1, ret = -1;
struct snap_log *log_buf, *log_free = NULL;
void *snap_buf = NULL;
struct sha1_file_hdr hdr;
log_free = log_buf = snap_log_read(&nr_logs);
sd_dprintf("%d", nr_logs);
if (nr_logs < 0)
goto out;
for (i = 0; i < nr_logs; i++, log_buf++) {
if (log_buf->epoch != epoch)
continue;
snap_buf = snap_file_read(log_buf->sha1, &hdr);
if (!snap_buf)
goto out;
memcpy(outsha1, snap_buf, SHA1_LEN);
ret = 0;
break;
}
out:
free(log_free);
free(snap_buf);
return ret;
}
static int farm_snapshot(struct siocb *iocb)
{
unsigned char snap_sha1[SHA1_LEN];
unsigned char trunk_sha1[SHA1_LEN];
void *buffer;
int log_nr, ret = SD_RES_EIO, epoch;
buffer = snap_log_read(&log_nr, 1);
if (!buffer)
goto out;
epoch = log_nr + 1;
dprintf("user epoch %d\n", epoch);
if (trunk_file_write(trunk_sha1, 1) < 0)
goto out;
if (snap_file_write(epoch, trunk_sha1, snap_sha1, 1) < 0)
goto out;
if (snap_log_write(epoch, snap_sha1, 1) < 0)
goto out;
ret = SD_RES_SUCCESS;
out:
free(buffer);
return ret;
}
static int farm_snapshot(const struct siocb *iocb)
{
unsigned char snap_sha1[SHA1_LEN];
unsigned char trunk_sha1[SHA1_LEN];
struct sd_node nodes[SD_MAX_NODES];
int nr_nodes;
void *buffer;
int log_nr, ret = SD_RES_EIO, epoch;
buffer = snap_log_read(&log_nr);
if (!buffer)
goto out;
epoch = log_nr + 1;
sd_dprintf("user epoch %d", epoch);
nr_nodes = epoch_log_read(sys->epoch, nodes, sizeof(nodes));
if (nr_nodes < 0)
goto out;
if (trunk_file_write(trunk_sha1) < 0)
goto out;
if (snap_file_write(sys->epoch, nodes, nr_nodes,
trunk_sha1, snap_sha1) < 0)
goto out;
if (snap_log_write(epoch, snap_sha1) < 0)
goto out;
ret = SD_RES_SUCCESS;
out:
free(buffer);
return ret;
}
static int farm_cleanup_sys_obj(struct siocb *iocb)
{
int i, ret = SD_RES_SUCCESS;
int epoch = iocb->epoch;
struct snap_log *log_pos, *log_free = NULL;
int nr_logs;
if (iocb->epoch <= 0)
return ret;
for (i = 1; i <= epoch; i++)
cleanup_trunk(i);
log_free = log_pos = snap_log_read(&nr_logs, 0);
if (snap_log_truncate() < 0) {
dprintf("snap reset fail\n");
ret = SD_RES_EIO;
goto out;
}
for (i = epoch + 1; i < nr_logs; i++, log_pos++) {
if (snap_log_write(log_pos->epoch, log_pos->sha1, 0) < 0) {
dprintf("snap write fail %d, %s\n",
log_pos->epoch, sha1_to_hex(log_pos->sha1));
ret = SD_RES_EIO;
goto out;
}
}
out:
free(log_free);
return ret;
}
static int farm_get_snap_file(struct siocb *iocb)
{
int ret = SD_RES_EIO;
void *buffer = NULL;
size_t size;
int nr;
sd_dprintf("try get snap file");
buffer = snap_log_read(&nr);
if (!buffer)
goto out;
size = nr * sizeof(struct snap_log);
memcpy(iocb->buf, buffer, size);
iocb->length = size;
ret = SD_RES_SUCCESS;
out:
free(buffer);
return ret;
}
