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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/progs/bpf_iter_netlink.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter_netlink.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_netlink.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c new file mode 100644 index 000000000..95989f4c9 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c @@ -0,0 +1,64 @@ +// 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> + +char _license[] SEC("license") = "GPL"; + +static __attribute__((noinline)) struct inode *SOCK_INODE(struct socket *socket) +{ + return &container_of(socket, struct socket_alloc, socket)->vfs_inode; +} + +SEC("iter/netlink") +int dump_netlink(struct bpf_iter__netlink *ctx) +{ + struct seq_file *seq = ctx->meta->seq; + struct netlink_sock *nlk = ctx->sk; + unsigned long group, ino; + struct inode *inode; + struct socket *sk; + struct sock *s; + + if (nlk == (void *)0) + return 0; + + if (ctx->meta->seq_num == 0) + BPF_SEQ_PRINTF(seq, "sk Eth Pid Groups " + "Rmem Wmem Dump Locks Drops " + "Inode\n"); + + s = &nlk->sk; + BPF_SEQ_PRINTF(seq, "%pK %-3d ", s, s->sk_protocol); + + if (!nlk->groups) { + group = 0; + } else { + /* FIXME: temporary use bpf_probe_read_kernel here, needs + * verifier support to do direct access. + */ + bpf_probe_read_kernel(&group, sizeof(group), &nlk->groups[0]); + } + BPF_SEQ_PRINTF(seq, "%-10u %08x %-8d %-8d %-5d %-8d ", + nlk->portid, (u32)group, + s->sk_rmem_alloc.counter, + s->sk_wmem_alloc.refs.counter - 1, + nlk->cb_running, s->sk_refcnt.refs.counter); + + sk = s->sk_socket; + if (!sk) { + ino = 0; + } else { + /* FIXME: container_of inside SOCK_INODE has a forced + * type conversion, and direct access cannot be used + * with current verifier. + */ + inode = SOCK_INODE(sk); + bpf_probe_read_kernel(&ino, sizeof(ino), &inode->i_ino); + } + BPF_SEQ_PRINTF(seq, "%-8u %-8lu\n", s->sk_drops.counter, ino); + + return 0; +} |