/* Allocates and returns a new 4096-bit bitmap that has 1-bit in positions in
* the 'n_vlans' bits indicated in 'vlans' and 0-bits everywhere else. Returns
* a null pointer if there are no (valid) VLANs in 'vlans'. */
unsigned long *
vlan_bitmap_from_array(const int64_t *vlans, size_t n_vlans)
{
unsigned long *b;
size_t i, n;
if (!n_vlans) {
return NULL;
}
b = bitmap_allocate(4096);
n = 0;
for (i = 0; i < n_vlans; i++) {
int64_t vlan = vlans[i];
if (vlan >= 0 && vlan < 4096) {
bitmap_set1(b, vlan);
n++;
}
}
if (!n) {
free(b);
return NULL;
}
return b;
}
/* Adds to 4096-bit VLAN bitmap 'b' a 1-bit in each position in the 'n_vlans'
* bits indicated in 'vlans'. Returns the number of 1-bits added to 'b'. */
int
vlan_bitmap_from_array__(const int64_t *vlans, size_t n_vlans,
unsigned long int *b)
{
size_t i;
int n;
n = 0;
for (i = 0; i < n_vlans; i++) {
int64_t vlan = vlans[i];
if (vlan >= 0 && vlan < 4096 && !bitmap_is_set(b, vlan)) {
bitmap_set1(b, vlan);
n++;
}
}
return n;
}
static void
update_ct_zones(struct sset *lports, struct simap *ct_zones,
unsigned long *ct_zone_bitmap)
{
struct simap_node *ct_zone, *ct_zone_next;
const char *iface_id;
int scan_start = 1;
/* xxx This is wasteful to assign a zone to each port--even if no
* xxx security policy is applied. */
/* Delete any zones that are associated with removed ports. */
SIMAP_FOR_EACH_SAFE(ct_zone, ct_zone_next, ct_zones) {
if (!sset_contains(lports, ct_zone->name)) {
bitmap_set0(ct_zone_bitmap, ct_zone->data);
simap_delete(ct_zones, ct_zone);
}
}
/* Assign a unique zone id for each logical port. */
SSET_FOR_EACH(iface_id, lports) {
size_t zone;
if (simap_contains(ct_zones, iface_id)) {
continue;
}
/* We assume that there are 64K zones and that we own them all. */
zone = bitmap_scan(ct_zone_bitmap, 0, scan_start, MAX_CT_ZONES + 1);
if (zone == MAX_CT_ZONES + 1) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
VLOG_WARN_RL(&rl, "exhausted all ct zones");
return;
}
scan_start = zone + 1;
bitmap_set1(ct_zone_bitmap, zone);
simap_put(ct_zones, iface_id, zone);
/* xxx We should erase any old entries for this
* xxx zone, but we need a generic interface to the conntrack
* xxx table. */
}
