enum bpf_map_type map_type = ri->map_type;
void *fwd = ri->tgt_value;
u32 map_id = ri->map_id;
+ u32 flags = ri->flags;
struct bpf_map *map;
int err;
ri->map_id = 0; /* Valid map id idr range: [1,INT_MAX[ */
+ ri->flags = 0;
ri->map_type = BPF_MAP_TYPE_UNSPEC;
if (unlikely(!xdpf)) {
case BPF_MAP_TYPE_DEVMAP:
fallthrough;
case BPF_MAP_TYPE_DEVMAP_HASH:
- map = READ_ONCE(ri->map);
- if (unlikely(map)) {
+ if (unlikely(flags & BPF_F_BROADCAST)) {
+ map = READ_ONCE(ri->map);
+
+ /* The map pointer is cleared when the map is being torn
+ * down by bpf_clear_redirect_map()
+ */
+ if (unlikely(!map)) {
+ err = -ENOENT;
+ break;
+ }
+
WRITE_ONCE(ri->map, NULL);
err = dev_map_enqueue_multi(xdpf, dev, map,
- ri->flags & BPF_F_EXCLUDE_INGRESS);
+ flags & BPF_F_EXCLUDE_INGRESS);
} else {
err = dev_map_enqueue(fwd, xdpf, dev);
}
static int xdp_do_generic_redirect_map(struct net_device *dev,
struct sk_buff *skb,
struct xdp_buff *xdp,
- struct bpf_prog *xdp_prog,
- void *fwd,
- enum bpf_map_type map_type, u32 map_id)
+ struct bpf_prog *xdp_prog, void *fwd,
+ enum bpf_map_type map_type, u32 map_id,
+ u32 flags)
{
struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
struct bpf_map *map;
case BPF_MAP_TYPE_DEVMAP:
fallthrough;
case BPF_MAP_TYPE_DEVMAP_HASH:
- map = READ_ONCE(ri->map);
- if (unlikely(map)) {
+ if (unlikely(flags & BPF_F_BROADCAST)) {
+ map = READ_ONCE(ri->map);
+
+ /* The map pointer is cleared when the map is being torn
+ * down by bpf_clear_redirect_map()
+ */
+ if (unlikely(!map)) {
+ err = -ENOENT;
+ break;
+ }
+
WRITE_ONCE(ri->map, NULL);
err = dev_map_redirect_multi(dev, skb, xdp_prog, map,
- ri->flags & BPF_F_EXCLUDE_INGRESS);
+ flags & BPF_F_EXCLUDE_INGRESS);
} else {
err = dev_map_generic_redirect(fwd, skb, xdp_prog);
}
enum bpf_map_type map_type = ri->map_type;
void *fwd = ri->tgt_value;
u32 map_id = ri->map_id;
+ u32 flags = ri->flags;
int err;
ri->map_id = 0; /* Valid map id idr range: [1,INT_MAX[ */
+ ri->flags = 0;
ri->map_type = BPF_MAP_TYPE_UNSPEC;
if (map_type == BPF_MAP_TYPE_UNSPEC && map_id == INT_MAX) {
return 0;
}
- return xdp_do_generic_redirect_map(dev, skb, xdp, xdp_prog, fwd, map_type, map_id);
+ return xdp_do_generic_redirect_map(dev, skb, xdp, xdp_prog, fwd, map_type, map_id, flags);
err:
_trace_xdp_redirect_err(dev, xdp_prog, ri->tgt_index, err);
return err;