From 8a89fff60a7ef63a23b112bdfa76d7ba160a4a68 Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Wed, 16 Jan 2019 11:10:00 -0800 Subject: [PATCH] bpftool: make key optional in lookup command Bpftool expects key for 'lookup' operations. For some map types, key should not be specified. Support looking up those map types. Before: 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 lookup pinned /sys/fs/bpf/q Error: did not find key After: 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 lookup pinned /sys/fs/bpf/q key: value: 00 01 02 03 Signed-off-by: Stanislav Fomichev Signed-off-by: Daniel Borkmann --- tools/bpf/bpftool/Documentation/bpftool-map.rst | 4 ++-- tools/bpf/bpftool/map.c | 10 +++------- 2 files changed, 5 insertions(+), 9 deletions(-) diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst index 1f1dfe06e66d..f34cace771bd 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-map.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst @@ -26,7 +26,7 @@ MAP COMMANDS | **entries** *MAX_ENTRIES* **name** *NAME* [**flags** *FLAGS*] [**dev** *NAME*] | **bpftool** **map dump** *MAP* | **bpftool** **map update** *MAP* [**key** *DATA*] [**value** *VALUE*] [*UPDATE_FLAGS*] -| **bpftool** **map lookup** *MAP* **key** *DATA* +| **bpftool** **map lookup** *MAP* [**key** *DATA*] | **bpftool** **map getnext** *MAP* [**key** *DATA*] | **bpftool** **map delete** *MAP* **key** *DATA* | **bpftool** **map pin** *MAP* *FILE* @@ -75,7 +75,7 @@ DESCRIPTION the bytes are parsed as decimal values, unless a "0x" prefix (for hexadecimal) or a "0" prefix (for octal) is provided. - **bpftool map lookup** *MAP* **key** *DATA* + **bpftool map lookup** *MAP* [**key** *DATA*] Lookup **key** in the map. **bpftool map getnext** *MAP* [**key** *DATA*] diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 61453a1ba6e1..4256842f9664 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -865,13 +865,9 @@ static int do_lookup(int argc, char **argv) if (fd < 0) return -1; - key = malloc(info.key_size); - value = alloc_value(&info); - if (!key || !value) { - p_err("mem alloc failed"); - err = -1; + err = alloc_key_value(&info, &key, &value); + if (err) goto exit_free; - } err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL); if (err) @@ -1158,7 +1154,7 @@ static int do_help(int argc, char **argv) " [dev NAME]\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 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" -- 2.30.2