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xdp: disable XDP_REDIRECT for xdp frags 

XDP_REDIRECT is not fully supported yet for xdp frags since not
all XDP capable drivers can map non-linear xdp_frame in ndo_xdp_xmit
so disable it for the moment.

Acked-by: Toke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/0da25e117d0e2673f5d0ce6503393c55c6fb1be9.1642758637.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2022-01-21 11:10:06 +01:00 committed by Alexei Starovoitov
parent 0c5e118cb4
commit ab0db46396
1 changed files with 8 additions and 0 deletions
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8
net/core/filter.c
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@ -4266,6 +4266,14 @@ int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp,
struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
enum bpf_map_type map_type = ri->map_type;
/* XDP_REDIRECT is not fully supported yet for xdp frags since
* not all XDP capable drivers can map non-linear xdp_frame in
* ndo_xdp_xmit.
*/
if (unlikely(xdp_buff_has_frags(xdp) &&
map_type != BPF_MAP_TYPE_CPUMAP))
return -EOPNOTSUPP;
if (map_type == BPF_MAP_TYPE_XSKMAP)
return __xdp_do_redirect_xsk(ri, dev, xdp, xdp_prog);