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// Copyright 2020 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.
#include <errno.h>
#include <fcntl.h>
#include <linux/fuse.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <vector>
#include "gtest/gtest.h"
#include "test/fuse/linux/fuse_fd_util.h"
#include "test/util/cleanup.h"
#include "test/util/fs_util.h"
#include "test/util/fuse_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
class StatTest : public FuseFdTest {
public:
void SetUp() override {
FuseFdTest::SetUp();
test_file_path_ = JoinPath(mount_point_.path(), test_file_);
}
protected:
bool StatsAreEqual(struct stat expected, struct stat actual) {
// Device number will be dynamically allocated by kernel, we cannot know in
// advance.
actual.st_dev = expected.st_dev;
return memcmp(&expected, &actual, sizeof(struct stat)) == 0;
}
const std::string test_file_ = "testfile";
const mode_t expected_mode = S_IFREG | S_IRUSR | S_IWUSR;
const uint64_t fh = 23;
std::string test_file_path_;
};
TEST_F(StatTest, StatNormal) {
// Set up fixture.
struct fuse_attr attr = DefaultFuseAttr(expected_mode, 1);
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_attr_out),
};
struct fuse_attr_out out_payload = {
.attr = attr,
};
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_GETATTR, iov_out);
// Make syscall.
struct stat stat_buf;
EXPECT_THAT(stat(mount_point_.path().c_str(), &stat_buf), SyscallSucceeds());
// Check filesystem operation result.
struct stat expected_stat = {
.st_ino = attr.ino,
#ifdef __aarch64__
.st_mode = expected_mode,
.st_nlink = attr.nlink,
#else
.st_nlink = attr.nlink,
.st_mode = expected_mode,
#endif
.st_uid = attr.uid,
.st_gid = attr.gid,
.st_rdev = attr.rdev,
.st_size = static_cast<off_t>(attr.size),
.st_blksize = attr.blksize,
.st_blocks = static_cast<blkcnt_t>(attr.blocks),
.st_atim = (struct timespec){.tv_sec = static_cast<int>(attr.atime),
.tv_nsec = attr.atimensec},
.st_mtim = (struct timespec){.tv_sec = static_cast<int>(attr.mtime),
.tv_nsec = attr.mtimensec},
.st_ctim = (struct timespec){.tv_sec = static_cast<int>(attr.ctime),
.tv_nsec = attr.ctimensec},
};
EXPECT_TRUE(StatsAreEqual(stat_buf, expected_stat));
// Check FUSE request.
struct fuse_in_header in_header;
struct fuse_getattr_in in_payload;
auto iov_in = FuseGenerateIovecs(in_header, in_payload);
GetServerActualRequest(iov_in);
EXPECT_EQ(in_header.opcode, FUSE_GETATTR);
EXPECT_EQ(in_payload.getattr_flags, 0);
EXPECT_EQ(in_payload.fh, 0);
}
TEST_F(StatTest, StatNotFound) {
// Set up fixture.
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header),
.error = -ENOENT,
};
auto iov_out = FuseGenerateIovecs(out_header);
SetServerResponse(FUSE_GETATTR, iov_out);
// Make syscall.
struct stat stat_buf;
EXPECT_THAT(stat(mount_point_.path().c_str(), &stat_buf),
SyscallFailsWithErrno(ENOENT));
// Check FUSE request.
struct fuse_in_header in_header;
struct fuse_getattr_in in_payload;
auto iov_in = FuseGenerateIovecs(in_header, in_payload);
GetServerActualRequest(iov_in);
EXPECT_EQ(in_header.opcode, FUSE_GETATTR);
EXPECT_EQ(in_payload.getattr_flags, 0);
EXPECT_EQ(in_payload.fh, 0);
}
TEST_F(StatTest, FstatNormal) {
// Set up fixture.
SetServerInodeLookup(test_file_);
auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenPath(test_file_path_, O_RDONLY, fh));
auto close_fd = CloseFD(fd);
struct fuse_attr attr = DefaultFuseAttr(expected_mode, 2);
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_attr_out),
};
struct fuse_attr_out out_payload = {
.attr = attr,
};
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_GETATTR, iov_out);
// Make syscall.
struct stat stat_buf;
EXPECT_THAT(fstat(fd.get(), &stat_buf), SyscallSucceeds());
// Check filesystem operation result.
struct stat expected_stat = {
.st_ino = attr.ino,
#ifdef __aarch64__
.st_mode = expected_mode,
.st_nlink = attr.nlink,
#else
.st_nlink = attr.nlink,
.st_mode = expected_mode,
#endif
.st_uid = attr.uid,
.st_gid = attr.gid,
.st_rdev = attr.rdev,
.st_size = static_cast<off_t>(attr.size),
.st_blksize = attr.blksize,
.st_blocks = static_cast<blkcnt_t>(attr.blocks),
.st_atim = (struct timespec){.tv_sec = static_cast<int>(attr.atime),
.tv_nsec = attr.atimensec},
.st_mtim = (struct timespec){.tv_sec = static_cast<int>(attr.mtime),
.tv_nsec = attr.mtimensec},
.st_ctim = (struct timespec){.tv_sec = static_cast<int>(attr.ctime),
.tv_nsec = attr.ctimensec},
};
EXPECT_TRUE(StatsAreEqual(stat_buf, expected_stat));
// Check FUSE request.
struct fuse_in_header in_header;
struct fuse_getattr_in in_payload;
auto iov_in = FuseGenerateIovecs(in_header, in_payload);
GetServerActualRequest(iov_in);
EXPECT_EQ(in_header.opcode, FUSE_GETATTR);
EXPECT_EQ(in_payload.getattr_flags, 0);
EXPECT_EQ(in_payload.fh, 0);
}
TEST_F(StatTest, StatByFileHandle) {
// Set up fixture.
SetServerInodeLookup(test_file_, expected_mode, 0);
auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenPath(test_file_path_, O_RDONLY, fh));
auto close_fd = CloseFD(fd);
struct fuse_attr attr = DefaultFuseAttr(expected_mode, 2, 0);
struct fuse_out_header out_header = {
.len = sizeof(struct fuse_out_header) + sizeof(struct fuse_attr_out),
};
struct fuse_attr_out out_payload = {
.attr = attr,
};
auto iov_out = FuseGenerateIovecs(out_header, out_payload);
SetServerResponse(FUSE_GETATTR, iov_out);
// Make syscall.
std::vector<char> buf(1);
// Since this is an empty file, it won't issue FUSE_READ. But a FUSE_GETATTR
// will be issued before read completes.
EXPECT_THAT(read(fd.get(), buf.data(), buf.size()), SyscallSucceeds());
// Check FUSE request.
struct fuse_in_header in_header;
struct fuse_getattr_in in_payload;
auto iov_in = FuseGenerateIovecs(in_header, in_payload);
GetServerActualRequest(iov_in);
EXPECT_EQ(in_header.opcode, FUSE_GETATTR);
EXPECT_EQ(in_payload.getattr_flags, FUSE_GETATTR_FH);
EXPECT_EQ(in_payload.fh, fh);
}
} // namespace
} // namespace testing
} // namespace gvisor
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