static int update_vnode_info(void)
{
struct vnode_info *vnode_info;
vnode_info = zalloc(sizeof(*vnode_info));
if (!vnode_info) {
eprintf("failed to allocate memory\n");
return 1;
}
vnode_info->nr_vnodes = nodes_to_vnodes(sys->nodes, sys->nr_nodes,
vnode_info->entries);
vnode_info->nr_zones = get_zones_nr_from(sys->nodes, sys->nr_nodes);
vnode_info->refcnt = 1;
put_vnode_info(current_vnode_info);
current_vnode_info = vnode_info;
return 0;
}
struct vnode_info *alloc_vnode_info(struct sd_node *nodes,
size_t nr_nodes)
{
struct vnode_info *vnode_info;
vnode_info = xzalloc(sizeof(*vnode_info));
vnode_info->nr_nodes = nr_nodes;
memcpy(vnode_info->nodes, nodes, sizeof(*nodes) * nr_nodes);
qsort(vnode_info->nodes, nr_nodes, sizeof(*nodes), node_id_cmp);
recalculate_vnodes(vnode_info->nodes, nr_nodes);
vnode_info->nr_vnodes = nodes_to_vnodes(vnode_info->nodes, nr_nodes,
vnode_info->vnodes);
vnode_info->nr_zones = get_zones_nr_from(nodes, nr_nodes);
uatomic_set(&vnode_info->refcnt, 1);
return vnode_info;
}
/*
* If we have less zones available than the desired redundancy we have to do
* with nr_zones copies, sorry.
*
* Note that you generally want to use get_nr_copies below, as it uses the
* current vnode state snapshot instead of global data.
*/
int get_max_nr_copies_from(struct sd_node *nodes, int nr_nodes)
{
return min((int)sys->nr_copies, get_zones_nr_from(nodes, nr_nodes));
}
