86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
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// Copyright 2020 The gVisor Authors.
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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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#include <errno.h>
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#include <fcntl.h>
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#include <linux/fuse.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string>
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#include <vector>
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#include "gtest/gtest.h"
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#include "test/fuse/linux/fuse_base.h"
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#include "test/util/fuse_util.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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class ReadlinkTest : public FuseTest {
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protected:
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const std::string test_file_ = "test_file_";
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const mode_t perms_ = S_IRWXU | S_IRWXG | S_IRWXO;
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};
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TEST_F(ReadlinkTest, ReadSymLink) {
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const std::string symlink_path =
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JoinPath(mount_point_.path().c_str(), test_file_);
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SetServerInodeLookup(test_file_, S_IFLNK | perms_);
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struct fuse_out_header out_header = {
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.len = static_cast<uint32_t>(sizeof(struct fuse_out_header)) +
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static_cast<uint32_t>(test_file_.length()) + 1,
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};
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std::string link = test_file_;
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auto iov_out = FuseGenerateIovecs(out_header, link);
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SetServerResponse(FUSE_READLINK, iov_out);
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const std::string actual_link =
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ASSERT_NO_ERRNO_AND_VALUE(ReadLink(symlink_path));
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struct fuse_in_header in_header;
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auto iov_in = FuseGenerateIovecs(in_header);
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GetServerActualRequest(iov_in);
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EXPECT_EQ(in_header.len, sizeof(in_header));
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EXPECT_EQ(in_header.opcode, FUSE_READLINK);
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EXPECT_EQ(0, memcmp(actual_link.c_str(), link.data(), link.size()));
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// next readlink should have link cached, so shouldn't have new request to
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// server.
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uint32_t recieved_before = GetServerTotalReceivedBytes();
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ASSERT_NO_ERRNO(ReadLink(symlink_path));
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EXPECT_EQ(GetServerTotalReceivedBytes(), recieved_before);
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}
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TEST_F(ReadlinkTest, NotSymlink) {
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const std::string test_file_path =
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JoinPath(mount_point_.path().c_str(), test_file_);
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SetServerInodeLookup(test_file_, S_IFREG | perms_);
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std::vector<char> buf(PATH_MAX + 1);
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ASSERT_THAT(readlink(test_file_path.c_str(), buf.data(), PATH_MAX),
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SyscallFailsWithErrno(EINVAL));
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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