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_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_end_recover(struct siocb *iocb)
{
unsigned char snap_sha1[SHA1_LEN];
unsigned char trunk_sha1[SHA1_LEN];
int epoch = iocb->epoch - 1;
if (epoch == 0)
return SD_RES_SUCCESS;
dprintf("epoch %d\n", epoch);
if (trunk_file_write_recovery(trunk_sha1) < 0)
return SD_RES_EIO;
if (snap_file_write(epoch, trunk_sha1, snap_sha1, 0) < 0)
return SD_RES_EIO;
if (snap_log_write(iocb->epoch - 1, snap_sha1, 0) < 0)
return SD_RES_EIO;
return SD_RES_SUCCESS;
}
static int farm_end_recover(uint32_t old_epoch,
struct vnode_info *old_vnode_info)
{
unsigned char snap_sha1[SHA1_LEN];
unsigned char trunk_sha1[SHA1_LEN];
if (old_epoch == 0)
return SD_RES_SUCCESS;
dprintf("old epoch %d\n", old_epoch);
if (trunk_file_write_recovery(trunk_sha1) < 0)
return SD_RES_EIO;
if (snap_file_write(old_epoch, old_vnode_info->nodes,
old_vnode_info->nr_nodes, trunk_sha1,
snap_sha1) < 0)
return SD_RES_EIO;
if (snap_log_write(old_epoch, snap_sha1, 0) < 0)
return SD_RES_EIO;
return SD_RES_SUCCESS;
}
