diff options
| -rw-r--r-- | include/uapi/linux/bpf.h | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 3f556b35ac8d..33f37eb0b6bf 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -1852,10 +1852,10 @@ union bpf_attr { * If lookup is successful and result shows packet is to be * forwarded, the neighbor tables are searched for the nexthop. * If successful (ie., FIB lookup shows forwarding and nexthop - * is resolved), the nexthop address is returned in ipv4_dst, - * ipv6_dst or mpls_out based on family, smac is set to mac - * address of egress device, dmac is set to nexthop mac address, - * rt_metric is set to metric from route. + * is resolved), the nexthop address is returned in ipv4_dst + * or ipv6_dst based on family, smac is set to mac address of + * egress device, dmac is set to nexthop mac address, rt_metric + * is set to metric from route (IPv4/IPv6 only). * * *plen* argument is the size of the passed in struct. * *flags* argument can be a combination of one or more of the @@ -2537,8 +2537,10 @@ struct bpf_raw_tracepoint_args { #define BPF_FIB_LOOKUP_OUTPUT BIT(1) struct bpf_fib_lookup { - /* input */ - __u8 family; /* network family, AF_INET, AF_INET6, AF_MPLS */ + /* input: network family for lookup (AF_INET, AF_INET6) + * output: network family of egress nexthop + */ + __u8 family; /* set if lookup is to consider L4 data - e.g., FIB rules */ __u8 l4_protocol; @@ -2554,22 +2556,20 @@ struct bpf_fib_lookup { __u8 tos; /* AF_INET */ __be32 flowlabel; /* AF_INET6 */ - /* output: metric of fib result */ - __u32 rt_metric; + /* output: metric of fib result (IPv4/IPv6 only) */ + __u32 rt_metric; }; union { - __be32 mpls_in; __be32 ipv4_src; __u32 ipv6_src[4]; /* in6_addr; network order */ }; - /* input to bpf_fib_lookup, *dst is destination address. - * output: bpf_fib_lookup sets to gateway address + /* input to bpf_fib_lookup, ipv{4,6}_dst is destination address in + * network header. output: bpf_fib_lookup sets to gateway address + * if FIB lookup returns gateway route */ union { - /* return for MPLS lookups */ - __be32 mpls_out[4]; /* support up to 4 labels */ __be32 ipv4_dst; __u32 ipv6_dst[4]; /* in6_addr; network order */ }; |