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author | Toke Høiland-Jørgensen <toke@redhat.com> | 2020-10-20 23:25:56 +0200 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-10-22 01:28:54 +0200 |
commit | ba452c9e996d8a4c347b32805f91abb70de5de7e (patch) | |
tree | 7cc639674290dda9b607ed44dc572b30f55502a7 /include/linux/filter.h | |
parent | c5eb48e89286510d638844104a6f6582a4838a32 (diff) | |
download | linux-stable-ba452c9e996d8a4c347b32805f91abb70de5de7e.tar.gz linux-stable-ba452c9e996d8a4c347b32805f91abb70de5de7e.tar.bz2 linux-stable-ba452c9e996d8a4c347b32805f91abb70de5de7e.zip |
bpf: Fix bpf_redirect_neigh helper api to support supplying nexthop
Based on the discussion in [0], update the bpf_redirect_neigh() helper to
accept an optional parameter specifying the nexthop information. This makes
it possible to combine bpf_fib_lookup() and bpf_redirect_neigh() without
incurring a duplicate FIB lookup - since the FIB lookup helper will return
the nexthop information even if no neighbour is present, this can simply
be passed on to bpf_redirect_neigh() if bpf_fib_lookup() returns
BPF_FIB_LKUP_RET_NO_NEIGH. Thus fix & extend it before helper API is frozen.
[0] https://lore.kernel.org/bpf/393e17fc-d187-3a8d-2f0d-a627c7c63fca@iogearbox.net/
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/bpf/160322915615.32199.1187570224032024535.stgit@toke.dk
Diffstat (limited to 'include/linux/filter.h')
-rw-r--r-- | include/linux/filter.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 20fc24c9779a..72d62cbc1578 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -607,12 +607,21 @@ struct bpf_skb_data_end { void *data_end; }; +struct bpf_nh_params { + u32 nh_family; + union { + u32 ipv4_nh; + struct in6_addr ipv6_nh; + }; +}; + struct bpf_redirect_info { u32 flags; u32 tgt_index; void *tgt_value; struct bpf_map *map; u32 kern_flags; + struct bpf_nh_params nh; }; DECLARE_PER_CPU(struct bpf_redirect_info, bpf_redirect_info); |