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// Copyright 2018 The gVisor Authors.
//
// 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.
#ifndef GVISOR_TEST_UTIL_MOUNT_UTIL_H_
#define GVISOR_TEST_UTIL_MOUNT_UTIL_H_
#include <errno.h>
#include <sys/mount.h>
#include <functional>
#include <string>
#include "gmock/gmock.h"
#include "absl/container/flat_hash_map.h"
#include "test/util/cleanup.h"
#include "test/util/posix_error.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
// Mount mounts the filesystem, and unmounts when the returned reference is
// destroyed.
inline PosixErrorOr<Cleanup> Mount(const std::string& source,
const std::string& target,
const std::string& fstype,
uint64_t mountflags, const std::string& data,
uint64_t umountflags) {
if (mount(source.c_str(), target.c_str(), fstype.c_str(), mountflags,
data.c_str()) == -1) {
return PosixError(errno, "mount failed");
}
return Cleanup([target, umountflags]() {
EXPECT_THAT(umount2(target.c_str(), umountflags), SyscallSucceeds());
});
}
struct ProcMountsEntry {
std::string spec;
std::string mount_point;
std::string fstype;
std::string mount_opts;
uint32_t dump;
uint32_t fsck;
};
// ProcSelfMountsEntries returns a parsed representation of /proc/self/mounts.
PosixErrorOr<std::vector<ProcMountsEntry>> ProcSelfMountsEntries();
struct ProcMountInfoEntry {
uint64_t id;
uint64_t parent_id;
dev_t major;
dev_t minor;
std::string root;
std::string mount_point;
std::string mount_opts;
std::string optional;
std::string fstype;
std::string mount_source;
std::string super_opts;
};
// ProcSelfMountInfoEntries returns a parsed representation of
// /proc/self/mountinfo.
PosixErrorOr<std::vector<ProcMountInfoEntry>> ProcSelfMountInfoEntries();
// Interprets the input string mopts as a comma separated list of mount
// options. A mount option can either be just a value, or a key=value pair. For
// example, the string "rw,relatime,fd=7" will be parsed into a map like { "rw":
// "", "relatime": "", "fd": "7" }.
absl::flat_hash_map<std::string, std::string> ParseMountOptions(
std::string mopts);
} // namespace testing
} // namespace gvisor
#endif // GVISOR_TEST_UTIL_MOUNT_UTIL_H_
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