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Allow fsync on a directory. 

PiperOrigin-RevId: 229781337
Change-Id: I1f946cff2771714fb1abd83a83ed454e9febda0a
This commit is contained in:
Nicolas Lacasse 2019-01-17 11:05:40 -08:00 committed by Shentubot
parent e4d3ca7263
commit 12bc7834dc
3 changed files with 15 additions and 11 deletions
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2
pkg/sentry/fs/fsutil/file.go
View File

@ -228,10 +228,10 @@ func (FileNoIoctl) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallAr
type DirFileOperations struct {
waiter.AlwaysReady
FileGenericSeek
FileNoFsync
FileNoIoctl
FileNoMMap
FileNoopFlush
FileNoopFsync
FileNoopRelease
}

1
test/syscalls/linux/BUILD
View File

@ -783,6 +783,7 @@ cc_binary(
srcs = ["fsync.cc"],
linkstatic = 1,
deps = [
"//test/util:file_descriptor",
"//test/util:temp_path",
"//test/util:test_main",
"//test/util:test_util",

23
test/syscalls/linux/fsync.cc
View File

@ -19,6 +19,7 @@
#include <string>
#include "gtest/gtest.h"
#include "test/util/file_descriptor.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
@ -28,22 +29,24 @@ namespace testing {
namespace {
TEST(FsyncTest, TempFileSucceeds) {
std::string path = NewTempAbsPath();
int fd;
EXPECT_THAT(fd = open(path.c_str(), O_RDWR | O_CREAT, 0666),
SyscallSucceeds());
auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR, 0666));
const std::string data = "some data to sync";
EXPECT_THAT(write(fd, data.c_str(), data.size()),
EXPECT_THAT(write(fd.get(), data.c_str(), data.size()),
SyscallSucceedsWithValue(data.size()));
EXPECT_THAT(fsync(fd), SyscallSucceeds());
ASSERT_THAT(close(fd), SyscallSucceeds());
ASSERT_THAT(unlink(path.c_str()), SyscallSucceeds());
EXPECT_THAT(fsync(fd.get()), SyscallSucceeds());
}
TEST(FsyncTest, TempDirSucceeds) {
auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(dir.path(), O_RDONLY | O_DIRECTORY));
EXPECT_THAT(fsync(fd.get()), SyscallSucceeds());
}
TEST(FsyncTest, CannotFsyncOnUnopenedFd) {
auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
int fd;
auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
ASSERT_THAT(fd = open(f.path().c_str(), O_RDONLY), SyscallSucceeds());
ASSERT_THAT(fd = open(file.path().c_str(), O_RDONLY), SyscallSucceeds());
ASSERT_THAT(close(fd), SyscallSucceeds());
// fd is now invalid.