100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
#include "../../testutils/FuseTest.h"
|
|
#include <condition_variable>
|
|
|
|
using ::testing::_;
|
|
using ::testing::StrEq;
|
|
using ::testing::Eq;
|
|
using ::testing::WithParamInterface;
|
|
using ::testing::Values;
|
|
using ::testing::Return;
|
|
using ::testing::Invoke;
|
|
using ::testing::InSequence;
|
|
using ::testing::AtLeast;
|
|
|
|
using std::string;
|
|
using std::mutex;
|
|
using std::unique_lock;
|
|
using std::condition_variable;
|
|
using std::chrono::duration;
|
|
using std::chrono::seconds;
|
|
|
|
// The fuse behaviour is: For each open(), there will be exactly one call to release().
|
|
// Directly before this call to release(), flush() will be called. After flush() returns,
|
|
// the ::close() syscall (in the process using the filesystem) returns. So the fuse release() call is
|
|
// called asynchronously afterwards. Errors have to be returned in the implementation of flush().
|
|
|
|
// Citing FUSE spec:
|
|
// 1) Flush is called on each close() of a file descriptor.
|
|
// 2) Filesystems shouldn't assume that flush will always be called after some writes, or that if will be called at all.
|
|
// I can't get these sentences together. For the test cases here, I go with the first one and assume that
|
|
// flush() will ALWAYS be called on a file close.
|
|
|
|
class Barrier {
|
|
public:
|
|
Barrier(): m(), cv(), finished(false) {}
|
|
|
|
template<class A, class B>
|
|
void WaitAtMost(const duration<A, B> &atMost) {
|
|
unique_lock<mutex> lock(m);
|
|
if (!finished) {
|
|
cv.wait_for(lock, atMost, [this] () {return finished;});
|
|
}
|
|
}
|
|
|
|
void Release() {
|
|
unique_lock<mutex> lock(m);
|
|
finished = true;
|
|
cv.notify_all();
|
|
}
|
|
private:
|
|
mutex m;
|
|
condition_variable cv;
|
|
bool finished;
|
|
};
|
|
|
|
class FuseCloseTest: public FuseTest, public WithParamInterface<int> {
|
|
public:
|
|
const string FILENAME = "/myfile";
|
|
|
|
void OpenAndCloseFile(const string &filename) {
|
|
auto fs = TestFS();
|
|
int fd = OpenFile(fs.get(), filename);
|
|
CloseFile(fd);
|
|
}
|
|
|
|
int OpenFile(const TempTestFS *fs, const string &filename) {
|
|
auto real_path = fs->mountDir() / filename;
|
|
int fd = ::open(real_path.c_str(), O_RDONLY);
|
|
EXPECT_GE(fd, 0) << "Opening file failed";
|
|
return fd;
|
|
}
|
|
|
|
void CloseFile(int fd) {
|
|
int retval = ::close(fd);
|
|
EXPECT_EQ(0, retval);
|
|
}
|
|
};
|
|
INSTANTIATE_TEST_CASE_P(FuseCloseTest, FuseCloseTest, Values(0, 1, 2, 100, 1024*1024*1024));
|
|
|
|
//TODO Figure out what's wrong and enable this test
|
|
//Disabled, because it is flaky. libfuse seems to not send the release() event sometimes.
|
|
TEST_P(FuseCloseTest, DISABLED_CloseFile) {
|
|
Barrier barrier;
|
|
|
|
ReturnIsFileOnLstat(FILENAME);
|
|
EXPECT_CALL(fsimpl, openFile(StrEq(FILENAME), _)).WillOnce(Return(GetParam()));
|
|
{
|
|
//InSequence fileCloseSequence;
|
|
EXPECT_CALL(fsimpl, flush(Eq(GetParam()))).Times(1);
|
|
EXPECT_CALL(fsimpl, closeFile(Eq(GetParam()))).Times(1).WillOnce(Invoke([&barrier] (int) {
|
|
// Release the waiting lock at the end of this test case, because the fuse release() came in now.
|
|
barrier.Release();
|
|
}));
|
|
}
|
|
|
|
OpenAndCloseFile(FILENAME);
|
|
|
|
// Wait, until fuse release() was called, so we can check for the function call expectation.
|
|
barrier.WaitAtMost(seconds(10));
|
|
}
|