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

     1  // Copyright 2020 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 <errno.h>
    16  #include <fcntl.h>
    17  #include <linux/fuse.h>
    18  #include <sys/stat.h>
    19  #include <sys/statfs.h>
    20  #include <sys/types.h>
    21  #include <unistd.h>
    22  
    23  #include <string>
    24  
    25  #include "gtest/gtest.h"
    26  #include "test/fuse/linux/fuse_base.h"
    27  #include "test/util/fuse_util.h"
    28  #include "test/util/test_util.h"
    29  
    30  namespace gvisor {
    31  namespace testing {
    32  
    33  namespace {
    34  
    35  class OpenTest : public FuseTest {
    36    // OpenTest doesn't care the release request when close a fd,
    37    // so doesn't check leftover requests when tearing down.
    38    void TearDown() { UnmountFuse(); }
    39  
    40   protected:
    41    const std::string test_file_ = "test_file";
    42    const mode_t regular_file_ = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO;
    43  
    44    struct fuse_open_out out_payload_ = {
    45        .fh = 1,
    46        .open_flags = O_RDWR,
    47    };
    48  };
    49  
    50  TEST_F(OpenTest, RegularFile) {
    51    const std::string test_file_path =
    52        JoinPath(mount_point_.path().c_str(), test_file_);
    53    SetServerInodeLookup(test_file_, regular_file_);
    54  
    55    struct fuse_out_header out_header = {
    56        .len = sizeof(struct fuse_out_header) + sizeof(struct fuse_open_out),
    57    };
    58    auto iov_out = FuseGenerateIovecs(out_header, out_payload_);
    59    SetServerResponse(FUSE_OPEN, iov_out);
    60    FileDescriptor fd =
    61        ASSERT_NO_ERRNO_AND_VALUE(Open(test_file_path.c_str(), O_RDWR));
    62  
    63    struct fuse_in_header in_header;
    64    struct fuse_open_in in_payload;
    65    auto iov_in = FuseGenerateIovecs(in_header, in_payload);
    66    GetServerActualRequest(iov_in);
    67  
    68    EXPECT_EQ(in_header.len, sizeof(in_header) + sizeof(in_payload));
    69    EXPECT_EQ(in_header.opcode, FUSE_OPEN);
    70    EXPECT_EQ(in_payload.flags, O_RDWR);
    71    EXPECT_THAT(fcntl(fd.get(), F_GETFL), SyscallSucceedsWithValue(O_RDWR));
    72  }
    73  
    74  TEST_F(OpenTest, SetNoOpen) {
    75    const std::string test_file_path =
    76        JoinPath(mount_point_.path().c_str(), test_file_);
    77    SetServerInodeLookup(test_file_, regular_file_);
    78  
    79    // ENOSYS indicates open is not implemented.
    80    struct fuse_out_header out_header = {
    81        .len = sizeof(struct fuse_out_header) + sizeof(struct fuse_open_out),
    82        .error = -ENOSYS,
    83    };
    84    auto iov_out = FuseGenerateIovecs(out_header, out_payload_);
    85    SetServerResponse(FUSE_OPEN, iov_out);
    86    ASSERT_NO_ERRNO_AND_VALUE(Open(test_file_path.c_str(), O_RDWR));
    87    SkipServerActualRequest();
    88  
    89    // check open doesn't send new request.
    90    uint32_t recieved_before = GetServerTotalReceivedBytes();
    91    ASSERT_NO_ERRNO_AND_VALUE(Open(test_file_path.c_str(), O_RDWR));
    92    EXPECT_EQ(GetServerTotalReceivedBytes(), recieved_before);
    93  }
    94  
    95  TEST_F(OpenTest, OpenFail) {
    96    struct fuse_out_header out_header = {
    97        .len = sizeof(struct fuse_out_header) + sizeof(struct fuse_open_out),
    98        .error = -ENOENT,
    99    };
   100  
   101    auto iov_out = FuseGenerateIovecs(out_header, out_payload_);
   102    SetServerResponse(FUSE_OPENDIR, iov_out);
   103    ASSERT_THAT(open(mount_point_.path().c_str(), O_RDWR),
   104                SyscallFailsWithErrno(ENOENT));
   105  
   106    struct fuse_in_header in_header;
   107    struct fuse_open_in in_payload;
   108    auto iov_in = FuseGenerateIovecs(in_header, in_payload);
   109    GetServerActualRequest(iov_in);
   110  
   111    EXPECT_EQ(in_header.len, sizeof(in_header) + sizeof(in_payload));
   112    EXPECT_EQ(in_header.opcode, FUSE_OPENDIR);
   113    EXPECT_EQ(in_payload.flags, O_RDWR);
   114  }
   115  
   116  TEST_F(OpenTest, DirectoryFlagOnRegularFile) {
   117    const std::string test_file_path =
   118        JoinPath(mount_point_.path().c_str(), test_file_);
   119  
   120    SetServerInodeLookup(test_file_, regular_file_);
   121    ASSERT_THAT(open(test_file_path.c_str(), O_RDWR | O_DIRECTORY),
   122                SyscallFailsWithErrno(ENOTDIR));
   123  }
   124  
   125  }  // namespace
   126  
   127  }  // namespace testing
   128  }  // namespace gvisor