71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include "bpf_iter.h"
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#include "bpf_tracing_net.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_endian.h>
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char _license[] SEC("license") = "GPL";
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static long sock_i_ino(const struct sock *sk)
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{
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const struct socket *sk_socket = sk->sk_socket;
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const struct inode *inode;
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unsigned long ino;
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if (!sk_socket)
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return 0;
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inode = &container_of(sk_socket, struct socket_alloc, socket)->vfs_inode;
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bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino);
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return ino;
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}
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SEC("iter/udp")
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int dump_udp4(struct bpf_iter__udp *ctx)
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{
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struct seq_file *seq = ctx->meta->seq;
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struct udp_sock *udp_sk = ctx->udp_sk;
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struct inet_sock *inet;
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__u16 srcp, destp;
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__be32 dest, src;
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__u32 seq_num;
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int rqueue;
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if (udp_sk == (void *)0)
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return 0;
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seq_num = ctx->meta->seq_num;
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if (seq_num == 0)
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BPF_SEQ_PRINTF(seq,
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" sl local_address rem_address st tx_queue "
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"rx_queue tr tm->when retrnsmt uid timeout "
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"inode ref pointer drops\n");
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/* filter out udp6 sockets */
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inet = &udp_sk->inet;
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if (inet->sk.sk_family == AF_INET6)
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return 0;
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inet = &udp_sk->inet;
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dest = inet->inet_daddr;
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src = inet->inet_rcv_saddr;
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srcp = bpf_ntohs(inet->inet_sport);
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destp = bpf_ntohs(inet->inet_dport);
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rqueue = inet->sk.sk_rmem_alloc.counter - udp_sk->forward_deficit;
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BPF_SEQ_PRINTF(seq, "%5d: %08X:%04X %08X:%04X ",
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ctx->bucket, src, srcp, dest, destp);
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BPF_SEQ_PRINTF(seq, "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
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inet->sk.sk_state,
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inet->sk.sk_wmem_alloc.refs.counter - 1,
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rqueue,
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0, 0L, 0, ctx->uid, 0,
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sock_i_ino(&inet->sk),
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inet->sk.sk_refcnt.refs.counter, udp_sk,
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inet->sk.sk_drops.counter);
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return 0;
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}
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