// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; extern bool CONFIG_IPV6_SUBTREES __kconfig __weak; SEC("iter/ipv6_route") int dump_ipv6_route(struct bpf_iter__ipv6_route *ctx) { struct seq_file *seq = ctx->meta->seq; struct fib6_info *rt = ctx->rt; const struct net_device *dev; struct fib6_nh *fib6_nh; unsigned int flags; struct nexthop *nh; if (rt == (void *)0) return 0; fib6_nh = &rt->fib6_nh[0]; flags = rt->fib6_flags; /* FIXME: nexthop_is_multipath is not handled here. */ nh = rt->nh; if (rt->nh) fib6_nh = &nh->nh_info->fib6_nh; BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen); if (CONFIG_IPV6_SUBTREES) BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_src.addr, rt->fib6_src.plen); else BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 00 "); if (fib6_nh->fib_nh_gw_family) { flags |= RTF_GATEWAY; BPF_SEQ_PRINTF(seq, "%pi6 ", &fib6_nh->fib_nh_gw6); } else { BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 "); } dev = fib6_nh->fib_nh_dev; if (dev) BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x %8s\n", rt->fib6_metric, rt->fib6_ref.refs.counter, 0, flags, dev->name); else BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x\n", rt->fib6_metric, rt->fib6_ref.refs.counter, 0, flags); return 0; }