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bpftool: add push and enqueue commands

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This is intended to be used with queues and stacks and be more
user-friendly than 'update' without the key.

Example:
bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q
bpftool map push pinned /sys/fs/bpf/q value 0 1 2 3
bpftool map peek pinned /sys/fs/bpf/q
value: 00 01 02 03

bpftool map create /sys/fs/bpf/s type stack value 4 entries 10 name s
bpftool map enqueue pinned /sys/fs/bpf/s value 0 1 2 3
bpftool map peek pinned /sys/fs/bpf/s
value: 00 01 02 03

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Stanislav Fomichev 2019-01-16 11:10:03 -08:00 committed by Daniel Borkmann
parent 66cf6e0b12
commit 549d4d3da7
2 changed files with 14 additions and 1 deletions
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8
tools/bpf/bpftool/Documentation/bpftool-map.rst
View File

@ -32,6 +32,8 @@ MAP COMMANDS
| **bpftool** **map pin** *MAP* *FILE*
| **bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*]
| **bpftool** **map peek** *MAP*
| **bpftool** **map push** *MAP* **value** *VALUE*
| **bpftool** **map enqueue** *MAP* **value** *VALUE*
| **bpftool** **map help**
|
| *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
@ -111,6 +113,12 @@ DESCRIPTION
**bpftool map peek** *MAP*
Peek next **value** in the queue or stack.
**bpftool map push** *MAP* **value** *VALUE*
Push **value** onto the stack.
**bpftool map enqueue** *MAP* **value** *VALUE*
Enqueue **value** into the queue.
**bpftool map help**
Print short help message.

7
tools/bpf/bpftool/map.c
View File

@ -1169,6 +1169,8 @@ static int do_help(int argc, char **argv)
" %s %s pin MAP FILE\n"
" %s %s event_pipe MAP [cpu N index M]\n"
" %s %s peek MAP\n"
" %s %s push MAP value VALUE\n"
" %s %s enqueue MAP value VALUE\n"
" %s %s help\n"
"\n"
" " HELP_SPEC_MAP "\n"
@ -1186,7 +1188,8 @@ 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], bin_name, argv[-2], bin_name, argv[-2],
bin_name, argv[-2]);
return 0;
}
@ -1204,6 +1207,8 @@ static const struct cmd cmds[] = {
{ "event_pipe", do_event_pipe },
{ "create", do_create },
{ "peek", do_lookup },
{ "push", do_update },
{ "enqueue", do_update },
{ 0 }
};