netdev - [PATCH bpf-next v2 6/6] tools: Add definitions for devmap

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Date:   Sat, 06 Jul 2019 10:47:16 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexei Starovoitov <ast@...nel.org>, netdev@...r.kernel.org,
        David Miller <davem@...emloft.net>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Björn Töpel <bjorn.topel@...il.com>
Subject: [PATCH bpf-next v2 6/6] tools: Add definitions for devmap_hash map
 type

From: Toke Høiland-Jørgensen <toke@...hat.com>

This adds a selftest, syncs the tools/ uapi header and adds the
devmap_hash name to bpftool for the new devmap_hash map type.

Signed-off-by: Toke Høiland-Jørgensen <toke@...hat.com>
---
 tools/bpf/bpftool/map.c                 |    1 +
 tools/include/uapi/linux/bpf.h          |    1 +
 tools/testing/selftests/bpf/test_maps.c |   16 ++++++++++++++++
 3 files changed, 18 insertions(+)

diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index 5da5a7311f13..c345f819b840 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -37,6 +37,7 @@ const char * const map_type_name[] = {
 	[BPF_MAP_TYPE_ARRAY_OF_MAPS]		= "array_of_maps",
 	[BPF_MAP_TYPE_HASH_OF_MAPS]		= "hash_of_maps",
 	[BPF_MAP_TYPE_DEVMAP]			= "devmap",
+	[BPF_MAP_TYPE_DEVMAP_HASH]		= "devmap_hash",
 	[BPF_MAP_TYPE_SOCKMAP]			= "sockmap",
 	[BPF_MAP_TYPE_CPUMAP]			= "cpumap",
 	[BPF_MAP_TYPE_XSKMAP]			= "xskmap",
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index cecf42c871d4..8afaa0a19c67 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -134,6 +134,7 @@ enum bpf_map_type {
 	BPF_MAP_TYPE_QUEUE,
 	BPF_MAP_TYPE_STACK,
 	BPF_MAP_TYPE_SK_STORAGE,
+	BPF_MAP_TYPE_DEVMAP_HASH,
 };
 
 /* Note that tracing related programs such as
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index a3fbc571280a..086319caf2d9 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -508,6 +508,21 @@ static void test_devmap(unsigned int task, void *data)
 	close(fd);
 }
 
+static void test_devmap_hash(unsigned int task, void *data)
+{
+	int fd;
+	__u32 key, value;
+
+	fd = bpf_create_map(BPF_MAP_TYPE_DEVMAP_HASH, sizeof(key), sizeof(value),
+			    2, 0);
+	if (fd < 0) {
+		printf("Failed to create devmap_hash '%s'!\n", strerror(errno));
+		exit(1);
+	}
+
+	close(fd);
+}
+
 static void test_queuemap(unsigned int task, void *data)
 {
 	const int MAP_SIZE = 32;
@@ -1675,6 +1690,7 @@ static void run_all_tests(void)
 	test_arraymap_percpu_many_keys();
 
 	test_devmap(0, NULL);
+	test_devmap_hash(0, NULL);
 	test_sockmap(0, NULL);
 
 	test_map_large();