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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2020 Facebook */3#include "bpf_iter.h"4#include "bpf_tracing_net.h"5#include <bpf/bpf_helpers.h>6 7char _license[] SEC("license") = "GPL";8 9extern bool CONFIG_IPV6_SUBTREES __kconfig __weak;10 11SEC("iter/ipv6_route")12int dump_ipv6_route(struct bpf_iter__ipv6_route *ctx)13{14 struct seq_file *seq = ctx->meta->seq;15 struct fib6_info *rt = ctx->rt;16 const struct net_device *dev;17 struct fib6_nh *fib6_nh;18 unsigned int flags;19 struct nexthop *nh;20 21 if (rt == (void *)0)22 return 0;23 24 fib6_nh = &rt->fib6_nh[0];25 flags = rt->fib6_flags;26 27 /* FIXME: nexthop_is_multipath is not handled here. */28 nh = rt->nh;29 if (rt->nh)30 fib6_nh = &nh->nh_info->fib6_nh;31 32 BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen);33 34 if (CONFIG_IPV6_SUBTREES)35 BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_src.addr,36 rt->fib6_src.plen);37 else38 BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 00 ");39 40 if (fib6_nh->fib_nh_gw_family) {41 flags |= RTF_GATEWAY;42 BPF_SEQ_PRINTF(seq, "%pi6 ", &fib6_nh->fib_nh_gw6);43 } else {44 BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 ");45 }46 47 dev = fib6_nh->fib_nh_dev;48 if (dev)49 BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x %8s\n", rt->fib6_metric,50 rt->fib6_ref.refs.counter, 0, flags, dev->name);51 else52 BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x\n", rt->fib6_metric,53 rt->fib6_ref.refs.counter, 0, flags);54 55 return 0;56}57