diff options
| author | Stanislav Fomichev <sdf@google.com> | 2019-01-16 20:10:02 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-01-17 10:30:31 +0100 |
| commit | 66cf6e0b1248e576468956cb33ad2dabc45163dc (patch) | |
| tree | 26536f1e65b0eec1602ea3526273254c1ca3b440 /tools/bpf | |
| parent | bpftool: don't print empty key/value for maps (diff) | |
| download | linux-66cf6e0b1248e576468956cb33ad2dabc45163dc.tar.xz linux-66cf6e0b1248e576468956cb33ad2dabc45163dc.zip | |
bpftool: add peek command
This is intended to be used with queues and stacks and be more
user-friendly than 'lookup' without key/value.
Example:
bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q
bpftool map update pinned /sys/fs/bpf/q value 0 1 2 3
bpftool map peek pinned /sys/fs/bpf/q
value: 00 01 02 03
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-map.rst | 4 | ||||
| -rw-r--r-- | tools/bpf/bpftool/map.c | 4 |
2 files changed, 7 insertions, 1 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst index f34cace771bd..b79da683da88 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-map.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst @@ -31,6 +31,7 @@ MAP COMMANDS | **bpftool** **map delete** *MAP* **key** *DATA* | **bpftool** **map pin** *MAP* *FILE* | **bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*] +| **bpftool** **map peek** *MAP* | **bpftool** **map help** | | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* } @@ -107,6 +108,9 @@ DESCRIPTION replace any existing ring. Any other application will stop receiving events if it installed its rings earlier. + **bpftool map peek** *MAP* + Peek next **value** in the queue or stack. + **bpftool map help** Print short help message. diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 3f599399913b..d7344fcd2089 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -1168,6 +1168,7 @@ static int do_help(int argc, char **argv) " %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 peek MAP\n" " %s %s help\n" "\n" " " HELP_SPEC_MAP "\n" @@ -1185,7 +1186,7 @@ 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], bin_name, argv[-2]); return 0; } @@ -1202,6 +1203,7 @@ static const struct cmd cmds[] = { { "pin", do_pin }, { "event_pipe", do_event_pipe }, { "create", do_create }, + { "peek", do_lookup }, { 0 } }; |