1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Facebook */
4 #include "bpf_tracing_net.h"
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_endian.h>
8 char _license[] SEC("license") = "GPL";
10 static long sock_i_ino(const struct sock *sk)
12 const struct socket *sk_socket = sk->sk_socket;
13 const struct inode *inode;
19 inode = &container_of(sk_socket, struct socket_alloc, socket)->vfs_inode;
20 bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino);
25 int dump_udp4(struct bpf_iter__udp *ctx)
27 struct seq_file *seq = ctx->meta->seq;
28 struct udp_sock *udp_sk = ctx->udp_sk;
29 struct inet_sock *inet;
35 if (udp_sk == (void *)0)
38 seq_num = ctx->meta->seq_num;
41 " sl local_address rem_address st tx_queue "
42 "rx_queue tr tm->when retrnsmt uid timeout "
43 "inode ref pointer drops\n");
45 /* filter out udp6 sockets */
47 if (inet->sk.sk_family == AF_INET6)
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;
57 BPF_SEQ_PRINTF(seq, "%5d: %08X:%04X %08X:%04X ",
58 ctx->bucket, src, srcp, dest, destp);
60 BPF_SEQ_PRINTF(seq, "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
62 inet->sk.sk_wmem_alloc.refs.counter - 1,
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);