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-rw-r--r--tools/testing/selftests/bpf/progs/bpf_iter_udp6.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c b/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c
new file mode 100644
index 000000000..65f93bb03
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c
@@ -0,0 +1,79 @@
+// 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>
+#include <bpf/bpf_endian.h>
+
+char _license[] SEC("license") = "GPL";
+
+#define IPV6_SEQ_DGRAM_HEADER \
+ " sl " \
+ "local_address " \
+ "remote_address " \
+ "st tx_queue rx_queue tr tm->when retrnsmt" \
+ " uid timeout inode ref pointer drops\n"
+
+static long sock_i_ino(const struct sock *sk)
+{
+ const struct socket *sk_socket = sk->sk_socket;
+ const struct inode *inode;
+ unsigned long ino;
+
+ if (!sk_socket)
+ return 0;
+
+ inode = &container_of(sk_socket, struct socket_alloc, socket)->vfs_inode;
+ bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino);
+ return ino;
+}
+
+SEC("iter/udp")
+int dump_udp6(struct bpf_iter__udp *ctx)
+{
+ struct seq_file *seq = ctx->meta->seq;
+ struct udp_sock *udp_sk = ctx->udp_sk;
+ const struct in6_addr *dest, *src;
+ struct udp6_sock *udp6_sk;
+ struct inet_sock *inet;
+ __u16 srcp, destp;
+ __u32 seq_num;
+ int rqueue;
+
+ if (udp_sk == (void *)0)
+ return 0;
+
+ seq_num = ctx->meta->seq_num;
+ if (seq_num == 0)
+ BPF_SEQ_PRINTF(seq, IPV6_SEQ_DGRAM_HEADER);
+
+ udp6_sk = bpf_skc_to_udp6_sock(udp_sk);
+ if (udp6_sk == (void *)0)
+ return 0;
+
+ inet = &udp_sk->inet;
+ srcp = bpf_ntohs(inet->inet_sport);
+ destp = bpf_ntohs(inet->inet_dport);
+ rqueue = inet->sk.sk_rmem_alloc.counter - udp_sk->forward_deficit;
+ dest = &inet->sk.sk_v6_daddr;
+ src = &inet->sk.sk_v6_rcv_saddr;
+
+ BPF_SEQ_PRINTF(seq, "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X ",
+ ctx->bucket,
+ src->s6_addr32[0], src->s6_addr32[1],
+ src->s6_addr32[2], src->s6_addr32[3], srcp,
+ dest->s6_addr32[0], dest->s6_addr32[1],
+ dest->s6_addr32[2], dest->s6_addr32[3], destp);
+
+ BPF_SEQ_PRINTF(seq, "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
+ inet->sk.sk_state,
+ inet->sk.sk_wmem_alloc.refs.counter - 1,
+ rqueue,
+ 0, 0L, 0, ctx->uid, 0,
+ sock_i_ino(&inet->sk),
+ inet->sk.sk_refcnt.refs.counter, udp_sk,
+ inet->sk.sk_drops.counter);
+
+ return 0;
+}