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xdp: Simplify __bpf_tx_xdp_map()

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The explicit error checking is not needed. Simply return the error
instead.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20191219061006.21980-9-bjorn.topel@gmail.com
This commit is contained in:
Björn Töpel 2019-12-19 07:10:06 +01:00 committed by Alexei Starovoitov
parent 332f22a60e
commit 1170beaa3f
1 changed files with 7 additions and 26 deletions
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33
net/core/filter.c
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@ -3510,35 +3510,16 @@ xdp_do_redirect_slow(struct net_device *dev, struct xdp_buff *xdp,
} }
static int __bpf_tx_xdp_map(struct net_device *dev_rx, void *fwd, static int __bpf_tx_xdp_map(struct net_device *dev_rx, void *fwd,
struct bpf_map *map, struct bpf_map *map, struct xdp_buff *xdp)
struct xdp_buff *xdp)
{ {
int err;
switch (map->map_type) { switch (map->map_type) {
case BPF_MAP_TYPE_DEVMAP: case BPF_MAP_TYPE_DEVMAP:
case BPF_MAP_TYPE_DEVMAP_HASH: { case BPF_MAP_TYPE_DEVMAP_HASH:
struct bpf_dtab_netdev *dst = fwd; return dev_map_enqueue(fwd, xdp, dev_rx);
case BPF_MAP_TYPE_CPUMAP:
err = dev_map_enqueue(dst, xdp, dev_rx); return cpu_map_enqueue(fwd, xdp, dev_rx);
if (unlikely(err)) case BPF_MAP_TYPE_XSKMAP:
return err; return __xsk_map_redirect(fwd, xdp);
break;
}
case BPF_MAP_TYPE_CPUMAP: {
struct bpf_cpu_map_entry *rcpu = fwd;
err = cpu_map_enqueue(rcpu, xdp, dev_rx);
if (unlikely(err))
return err;
break;
}
case BPF_MAP_TYPE_XSKMAP: {
struct xdp_sock *xs = fwd;
err = __xsk_map_redirect(xs, xdp);
return err;
}
default: default:
break; break;
} }