150 lines
4.0 KiB
C++
150 lines
4.0 KiB
C++
/*
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* Copyright (c) 2019 Kinvolk GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <linux/version.h>
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#include <unistd.h>
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#include <string>
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#include <sys/mount.h>
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#include "BPF.h"
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#include "catch.hpp"
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
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TEST_CASE("test pinned table", "[pinned_table]") {
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bool mounted = false;
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if (system("mount | grep /sys/fs/bpf")) {
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REQUIRE(system("mkdir -p /sys/fs/bpf") == 0);
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REQUIRE(system("mount -o nosuid,nodev,noexec,mode=700 -t bpf bpf /sys/fs/bpf") == 0);
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mounted = true;
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}
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// prepare test by pinning table to bpffs
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{
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const std::string BPF_PROGRAM = R"(
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BPF_TABLE("hash", u64, u64, ids, 1024);
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)";
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ebpf::BPF bpf;
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ebpf::StatusTuple res(0);
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res = bpf.init(BPF_PROGRAM);
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REQUIRE(res.ok());
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REQUIRE(bpf_obj_pin(bpf.get_hash_table<int, int>("ids").get_fd(), "/sys/fs/bpf/test_pinned_table") == 0);
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}
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// test table access
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{
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const std::string BPF_PROGRAM = R"(
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BPF_TABLE_PINNED("hash", u64, u64, ids, 0, "/sys/fs/bpf/test_pinned_table", BPF_F_NO_PREALLOC);
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)";
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ebpf::BPF bpf;
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ebpf::StatusTuple res(0);
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res = bpf.init(BPF_PROGRAM);
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unlink("/sys/fs/bpf/test_pinned_table"); // can delete table here already
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REQUIRE(res.ok());
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auto t = bpf.get_hash_table<int, int>("ids");
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int key, value;
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// write element
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key = 0x08;
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value = 0x43;
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res = t.update_value(key, value);
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REQUIRE(res.ok());
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REQUIRE(t[key] == value);
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}
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// test create if not exist
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{
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const std::string BPF_PROGRAM = R"(
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BPF_TABLE_PINNED("hash", u64, u64, ids, 1024, "/sys/fs/bpf/test_pinned_table");
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)";
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ebpf::BPF bpf;
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ebpf::StatusTuple res(0);
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res = bpf.init(BPF_PROGRAM);
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REQUIRE(res.ok());
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unlink("/sys/fs/bpf/test_pinned_table");
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}
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if (mounted) {
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REQUIRE(umount("/sys/fs/bpf") == 0);
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}
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}
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0)
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TEST_CASE("test pinned sk_storage table", "[pinned_sk_storage_table]") {
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bool mounted = false;
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if (system("mount | grep /sys/fs/bpf")) {
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REQUIRE(system("mkdir -p /sys/fs/bpf") == 0);
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REQUIRE(system("mount -o nosuid,nodev,noexec,mode=700 -t bpf bpf /sys/fs/bpf") == 0);
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mounted = true;
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}
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// prepare test by pinning table to bpffs
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{
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const std::string BPF_PROGRAM = R"(
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BPF_SK_STORAGE(sk_stg, __u64);
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int test(struct __sk_buff *skb) { return 0; }
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)";
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ebpf::BPF bpf;
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ebpf::StatusTuple res(0);
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res = bpf.init(BPF_PROGRAM);
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REQUIRE(res.ok());
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REQUIRE(bpf_obj_pin(bpf.get_sk_storage_table<unsigned long long>("sk_stg").get_fd(), "/sys/fs/bpf/test_pinned_table") == 0);
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}
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// exercise <pinned_map>.sk_storage_get().
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{
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const std::string BPF_PROGRAM = R"(
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BPF_TABLE_PINNED("sk_storage", __u32, __u64, sk_stg, 0, "/sys/fs/bpf/test_pinned_table");
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int test(struct __sk_buff *skb) {
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struct bpf_sock *sk;
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__u64 *val;
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sk = skb->sk;
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if (!sk)
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return 0;
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sk = bpf_sk_fullsock(sk);
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if (!sk)
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return 0;
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val = sk_stg.sk_storage_get(sk, NULL, BPF_SK_STORAGE_GET_F_CREATE);
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if (!val)
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return 0;
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return 1;
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}
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)";
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ebpf::BPF bpf;
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ebpf::StatusTuple res(0);
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res = bpf.init(BPF_PROGRAM);
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REQUIRE(res.ok());
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int prog_fd;
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res = bpf.load_func("test", BPF_PROG_TYPE_CGROUP_SKB, prog_fd);
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REQUIRE(res.ok());
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}
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unlink("/sys/fs/bpf/test_pinned_table");
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if (mounted) {
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REQUIRE(umount("/sys/fs/bpf") == 0);
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}
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}
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#endif
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