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