linux/tools/bpf/bpftool/netlink_dumper.h
Daniel Borkmann 57c61da8bf bpftool: Extend net dump with tcx progs
Add support to dump fd-based attach types via bpftool. This includes both
the tc BPF link and attach ops programs. Dumped information contain the
attach location, function entry name, program ID and link ID when applicable.

Example with tc BPF link:

  # ./bpftool net
  xdp:

  tc:
  bond0(4) tcx/ingress cil_from_netdev prog_id 784 link_id 10
  bond0(4) tcx/egress cil_to_netdev prog_id 804 link_id 11

  flow_dissector:

  netfilter:

Example with tc BPF attach ops:

  # ./bpftool net
  xdp:

  tc:
  bond0(4) tcx/ingress cil_from_netdev prog_id 654
  bond0(4) tcx/egress cil_to_netdev prog_id 672

  flow_dissector:

  netfilter:

Currently, permanent flags are not yet supported, so 'unknown' ones are dumped
via NET_DUMP_UINT_ONLY() and once we do have permanent ones, we dump them as
human readable string.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/r/20230719140858.13224-7-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-07-19 10:07:28 -07:00

104 lines
2.0 KiB
C

/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
// Copyright (C) 2018 Facebook
#ifndef _NETLINK_DUMPER_H_
#define _NETLINK_DUMPER_H_
#define NET_START_OBJECT \
{ \
if (json_output) \
jsonw_start_object(json_wtr); \
}
#define NET_START_OBJECT_NESTED(name) \
{ \
if (json_output) { \
jsonw_name(json_wtr, name); \
jsonw_start_object(json_wtr); \
} else { \
fprintf(stdout, "%s {", name); \
} \
}
#define NET_START_OBJECT_NESTED2 \
{ \
if (json_output) \
jsonw_start_object(json_wtr); \
else \
fprintf(stdout, "{"); \
}
#define NET_END_OBJECT_NESTED \
{ \
if (json_output) \
jsonw_end_object(json_wtr); \
else \
fprintf(stdout, "}"); \
}
#define NET_END_OBJECT \
{ \
if (json_output) \
jsonw_end_object(json_wtr); \
}
#define NET_END_OBJECT_FINAL \
{ \
if (json_output) \
jsonw_end_object(json_wtr); \
else \
fprintf(stdout, "\n"); \
}
#define NET_START_ARRAY(name, fmt_str) \
{ \
if (json_output) { \
jsonw_name(json_wtr, name); \
jsonw_start_array(json_wtr); \
} else { \
fprintf(stdout, fmt_str, name); \
} \
}
#define NET_END_ARRAY(endstr) \
{ \
if (json_output) \
jsonw_end_array(json_wtr); \
else \
fprintf(stdout, "%s", endstr); \
}
#define NET_DUMP_UINT(name, fmt_str, val) \
{ \
if (json_output) \
jsonw_uint_field(json_wtr, name, val); \
else \
fprintf(stdout, fmt_str, val); \
}
#define NET_DUMP_UINT_ONLY(str) \
{ \
if (json_output) \
jsonw_uint(json_wtr, str); \
else \
fprintf(stdout, "%u ", str); \
}
#define NET_DUMP_STR(name, fmt_str, str) \
{ \
if (json_output) \
jsonw_string_field(json_wtr, name, str);\
else \
fprintf(stdout, fmt_str, str); \
}
#define NET_DUMP_STR_ONLY(str) \
{ \
if (json_output) \
jsonw_string(json_wtr, str); \
else \
fprintf(stdout, "%s ", str); \
}
#endif