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bpf: flowlabel in bpf_fib_lookup should be flowinfo

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As Michal noted the flow struct takes both the flow label and priority.
Update the bpf_fib_lookup API to note that it is flowinfo and not just
the flow label.

Cc: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
David Ahern 2018-06-03 08:15:19 -07:00 committed by Alexei Starovoitov
parent 432bdb581e
commit bd3a08aaa9
3 changed files with 3 additions and 3 deletions
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2
include/uapi/linux/bpf.h
View File

@ -2629,7 +2629,7 @@ struct bpf_fib_lookup {
union {
/* inputs to lookup */
__u8 tos; /* AF_INET */
__be32 flowlabel; /* AF_INET6 */
__be32 flowinfo; /* AF_INET6, flow_label + priority */
/* output: metric of fib result (IPv4/IPv6 only) */
__u32 rt_metric;

2
net/core/filter.c
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@ -4221,7 +4221,7 @@ static int bpf_ipv6_fib_lookup(struct net *net, struct bpf_fib_lookup *params,
fl6.flowi6_oif = 0;
strict = RT6_LOOKUP_F_HAS_SADDR;
}
fl6.flowlabel = params->flowlabel;
fl6.flowlabel = params->flowinfo;
fl6.flowi6_scope = 0;
fl6.flowi6_flags = 0;
fl6.mp_hash = 0;

2
samples/bpf/xdp_fwd_kern.c
View File

@ -88,7 +88,7 @@ static __always_inline int xdp_fwd_flags(struct xdp_md *ctx, u32 flags)
return XDP_PASS;
fib_params.family = AF_INET6;
fib_params.flowlabel = *(__be32 *)ip6h & IPV6_FLOWINFO_MASK;
fib_params.flowinfo = *(__be32 *)ip6h & IPV6_FLOWINFO_MASK;
fib_params.l4_protocol = ip6h->nexthdr;
fib_params.sport = 0;
fib_params.dport = 0;