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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-05-03 18:37:16 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-04 23:41:04 +0200 |
| commit | f412eed9dfdeeb6becd7de2ffe8b5d0a8b3f81ca (patch) | |
| tree | c6cf7b305e343a73505d5d1d25ee300a46992147 /tools/bpf/bpftool/map.c | |
| parent | e64d52569f6e847495091db40ab58d2d379748ef (diff) | |
| download | linux-f412eed9dfdeeb6becd7de2ffe8b5d0a8b3f81ca.tar.bz2 | |
tools: bpftool: add simple perf event output reader
Users of BPF sooner or later discover perf_event_output() helpers
and BPF_MAP_TYPE_PERF_EVENT_ARRAY. Dumping this array type is
not possible, however, we can add simple reading of perf events.
Create a new event_pipe subcommand for maps, this sub command
will only work with BPF_MAP_TYPE_PERF_EVENT_ARRAY maps.
Parts of the code from samples/bpf/trace_output_user.c.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/map.c')
| -rw-r--r-- | tools/bpf/bpftool/map.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 5efefde5f578..af6766e956ba 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -130,8 +130,7 @@ static int map_parse_fd(int *argc, char ***argv) return -1; } -static int -map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len) +int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len) { int err; int fd; @@ -817,12 +816,13 @@ static int do_help(int argc, char **argv) fprintf(stderr, "Usage: %s %s { show | list } [MAP]\n" - " %s %s dump MAP\n" - " %s %s update MAP key DATA value VALUE [UPDATE_FLAGS]\n" - " %s %s lookup MAP key DATA\n" - " %s %s getnext MAP [key DATA]\n" - " %s %s delete MAP key DATA\n" - " %s %s pin MAP FILE\n" + " %s %s dump MAP\n" + " %s %s update MAP key DATA value VALUE [UPDATE_FLAGS]\n" + " %s %s lookup MAP key DATA\n" + " %s %s getnext MAP [key DATA]\n" + " %s %s delete MAP key DATA\n" + " %s %s pin MAP FILE\n" + " %s %s event_pipe MAP [cpu N index M]\n" " %s %s help\n" "\n" " MAP := { id MAP_ID | pinned FILE }\n" @@ -834,7 +834,7 @@ static int do_help(int argc, char **argv) "", bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2], - bin_name, argv[-2], bin_name, argv[-2]); + bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2]); return 0; } @@ -849,6 +849,7 @@ static const struct cmd cmds[] = { { "getnext", do_getnext }, { "delete", do_delete }, { "pin", do_pin }, + { "event_pipe", do_event_pipe }, { 0 } }; |