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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 10static long sock_i_ino(const struct sock *sk)11{12 const struct socket *sk_socket = sk->sk_socket;13 const struct inode *inode;14 unsigned long ino;15 16 if (!sk_socket)17 return 0;18 19 inode = &container_of(sk_socket, struct socket_alloc, socket)->vfs_inode;20 bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino);21 return ino;22}23 24SEC("iter/udp")25int dump_udp4(struct bpf_iter__udp *ctx)26{27 struct seq_file *seq = ctx->meta->seq;28 struct udp_sock *udp_sk = ctx->udp_sk;29 struct inet_sock *inet;30 __u16 srcp, destp;31 __be32 dest, src;32 __u32 seq_num;33 int rqueue;34 35 if (udp_sk == (void *)0)36 return 0;37 38 seq_num = ctx->meta->seq_num;39 if (seq_num == 0)40 BPF_SEQ_PRINTF(seq,41 " sl local_address rem_address st tx_queue "42 "rx_queue tr tm->when retrnsmt uid timeout "43 "inode ref pointer drops\n");44 45 /* filter out udp6 sockets */46 inet = &udp_sk->inet;47 if (inet->sk.sk_family == AF_INET6)48 return 0;49 50 inet = &udp_sk->inet;51 dest = inet->inet_daddr;52 src = inet->inet_rcv_saddr;53 srcp = bpf_ntohs(inet->inet_sport);54 destp = bpf_ntohs(inet->inet_dport);55 rqueue = inet->sk.sk_rmem_alloc.counter - udp_sk->forward_deficit;56 57 BPF_SEQ_PRINTF(seq, "%5d: %08X:%04X %08X:%04X ",58 ctx->bucket, src, srcp, dest, destp);59 60 BPF_SEQ_PRINTF(seq, "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",61 inet->sk.sk_state,62 inet->sk.sk_wmem_alloc.refs.counter - 1,63 rqueue,64 0, 0L, 0, ctx->uid, 0,65 sock_i_ino(&inet->sk),66 inet->sk.sk_refcnt.refs.counter, udp_sk,67 inet->sk.sk_drops.counter);68 69 return 0;70}71