github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/syscalls/linux/statfs.cc (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include <fcntl.h>
    16  #include <linux/magic.h>
    17  #include <sys/statfs.h>
    18  #include <unistd.h>
    19  
    20  #include "gtest/gtest.h"
    21  #include "test/util/file_descriptor.h"
    22  #include "test/util/temp_path.h"
    23  #include "test/util/test_util.h"
    24  
    25  namespace gvisor {
    26  namespace testing {
    27  
    28  namespace {
    29  
    30  TEST(StatfsTest, CannotStatBadPath) {
    31    auto temp_file = NewTempAbsPathInDir("/tmp");
    32  
    33    struct statfs st;
    34    EXPECT_THAT(statfs(temp_file.c_str(), &st), SyscallFailsWithErrno(ENOENT));
    35  }
    36  
    37  TEST(StatfsTest, InternalTmpfs) {
    38    auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
    39  
    40    struct statfs st;
    41    EXPECT_THAT(statfs(temp_file.path().c_str(), &st), SyscallSucceeds());
    42  }
    43  
    44  TEST(StatfsTest, InternalDevShm) {
    45    struct statfs st;
    46    EXPECT_THAT(statfs("/dev/shm", &st), SyscallSucceeds());
    47  
    48    // This assumes that /dev/shm is tmpfs.
    49    // Note: We could be an overlay on some configurations.
    50    EXPECT_TRUE(st.f_type == TMPFS_MAGIC || st.f_type == OVERLAYFS_SUPER_MAGIC);
    51  }
    52  
    53  TEST(FstatfsTest, CannotStatBadFd) {
    54    struct statfs st;
    55    EXPECT_THAT(fstatfs(-1, &st), SyscallFailsWithErrno(EBADF));
    56  }
    57  
    58  TEST(FstatfsTest, InternalTmpfs) {
    59    auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
    60    const FileDescriptor fd =
    61        ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDONLY));
    62  
    63    struct statfs st;
    64    EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
    65  }
    66  
    67  TEST(FstatfsTest, CanStatFileWithOpath) {
    68    SKIP_IF(IsRunningWithVFS1());
    69    auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
    70    const FileDescriptor fd =
    71        ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_PATH));
    72  
    73    struct statfs st;
    74    EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
    75  }
    76  
    77  TEST(FstatfsTest, InternalDevShm) {
    78    auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
    79    const FileDescriptor fd =
    80        ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/shm", O_RDONLY));
    81  
    82    struct statfs st;
    83    EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
    84  }
    85  
    86  }  // namespace
    87  
    88  }  // namespace testing
    89  }  // namespace gvisor