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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#include <bpf/bpf_endian.h>7 8char _license[] SEC("license") = "GPL";9 10#define IPV6_SEQ_DGRAM_HEADER \11 " sl " \12 "local_address " \13 "remote_address " \14 "st tx_queue rx_queue tr tm->when retrnsmt" \15 " uid timeout inode ref pointer drops\n"16 17static long sock_i_ino(const struct sock *sk)18{19 const struct socket *sk_socket = sk->sk_socket;20 const struct inode *inode;21 unsigned long ino;22 23 if (!sk_socket)24 return 0;25 26 inode = &container_of(sk_socket, struct socket_alloc, socket)->vfs_inode;27 bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino);28 return ino;29}30 31SEC("iter/udp")32int dump_udp6(struct bpf_iter__udp *ctx)33{34 struct seq_file *seq = ctx->meta->seq;35 struct udp_sock *udp_sk = ctx->udp_sk;36 const struct in6_addr *dest, *src;37 struct udp6_sock *udp6_sk;38 struct inet_sock *inet;39 __u16 srcp, destp;40 __u32 seq_num;41 int rqueue;42 43 if (udp_sk == (void *)0)44 return 0;45 46 seq_num = ctx->meta->seq_num;47 if (seq_num == 0)48 BPF_SEQ_PRINTF(seq, IPV6_SEQ_DGRAM_HEADER);49 50 udp6_sk = bpf_skc_to_udp6_sock(udp_sk);51 if (udp6_sk == (void *)0)52 return 0;53 54 inet = &udp_sk->inet;55 srcp = bpf_ntohs(inet->inet_sport);56 destp = bpf_ntohs(inet->inet_dport);57 rqueue = inet->sk.sk_rmem_alloc.counter - udp_sk->forward_deficit;58 dest = &inet->sk.sk_v6_daddr;59 src = &inet->sk.sk_v6_rcv_saddr;60 61 BPF_SEQ_PRINTF(seq, "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X ",62 ctx->bucket,63 src->s6_addr32[0], src->s6_addr32[1],64 src->s6_addr32[2], src->s6_addr32[3], srcp,65 dest->s6_addr32[0], dest->s6_addr32[1],66 dest->s6_addr32[2], dest->s6_addr32[3], destp);67 68 BPF_SEQ_PRINTF(seq, "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",69 inet->sk.sk_state,70 inet->sk.sk_wmem_alloc.refs.counter - 1,71 rqueue,72 0, 0L, 0, ctx->uid, 0,73 sock_i_ino(&inet->sk),74 inet->sk.sk_refcnt.refs.counter, udp_sk,75 inet->sk.sk_drops.counter);76 77 return 0;78}79