netdev - [PATCH bpf-next v2 5/7] bpftool: add push and enqueue commands

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Message-Id: <20190116191005.164355-6-sdf@google.com>
Date:   Wed, 16 Jan 2019 11:10:03 -0800
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
        jakub.kicinski@...ronome.com, quentin.monnet@...ronome.com,
        Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf-next v2 5/7] bpftool: add push and enqueue commands

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@...gle.com>
---
 tools/bpf/bpftool/Documentation/bpftool-map.rst | 8 ++++++++
 tools/bpf/bpftool/map.c                         | 7 ++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
index b79da683da88..435a79d2eed5 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-map.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -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.
 
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index d7344fcd2089..6b5fcbe2d9d4 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -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 }
 };
 
-- 
2.20.1.97.g81188d93c3-goog