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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-10-16 02:30:36 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-10-16 02:39:21 +0300 |
| commit | 0b592b5a01bef5416472ec610d3191e019c144a5 (patch) | |
| tree | d823270ded921a40ce37d54b4bdfbf607c8f402b /tools/bpf/bpftool/Documentation/bpftool-map.rst | |
| parent | 2f1d774f7d356a7e95ac7c41373d518cf0d716c7 (diff) | |
| download | linux-0b592b5a01bef5416472ec610d3191e019c144a5.tar.xz | |
tools: bpftool: add map create command
Add a way of creating maps from user space. The command takes
as parameters most of the attributes of the map creation system
call command. After map is created its pinned to bpffs. This makes
it possible to easily and dynamically (without rebuilding programs)
test various corner cases related to map creation.
Map type names are taken from bpftool's array used for printing.
In general these days we try to make use of libbpf type names, but
there are no map type names in libbpf as of today.
As with most features I add the motivation is testing (offloads) :)
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/bpf/bpftool/Documentation/bpftool-map.rst')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-map.rst | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst index a6258bc8ec4f..3497f2d80328 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-map.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst @@ -15,13 +15,15 @@ SYNOPSIS *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } } *COMMANDS* := - { **show** | **list** | **dump** | **update** | **lookup** | **getnext** | **delete** - | **pin** | **help** } + { **show** | **list** | **create** | **dump** | **update** | **lookup** | **getnext** + | **delete** | **pin** | **help** } MAP COMMANDS ============= | **bpftool** **map { show | list }** [*MAP*] +| **bpftool** **map create** *FILE* **type** *TYPE* **key** *KEY_SIZE* **value** *VALUE_SIZE* \ +| **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* @@ -36,6 +38,11 @@ MAP COMMANDS | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } | *VALUE* := { *DATA* | *MAP* | *PROG* } | *UPDATE_FLAGS* := { **any** | **exist** | **noexist** } +| *TYPE* := { **hash** | **array** | **prog_array** | **perf_event_array** | **percpu_hash** +| | **percpu_array** | **stack_trace** | **cgroup_array** | **lru_hash** +| | **lru_percpu_hash** | **lpm_trie** | **array_of_maps** | **hash_of_maps** +| | **devmap** | **sockmap** | **cpumap** | **xskmap** | **sockhash** +| | **cgroup_storage** | **reuseport_sockarray** | **percpu_cgroup_storage** } DESCRIPTION =========== @@ -47,6 +54,10 @@ DESCRIPTION Output will start with map ID followed by map type and zero or more named attributes (depending on kernel version). + **bpftool map create** *FILE* **type** *TYPE* **key** *KEY_SIZE* **value** *VALUE_SIZE* **entries** *MAX_ENTRIES* **name** *NAME* [**flags** *FLAGS*] [**dev** *NAME*] + Create a new map with given parameters and pin it to *bpffs* + as *FILE*. + **bpftool map dump** *MAP* Dump all entries in a given *MAP*. |