summaryrefslogtreecommitdiffhomepage
path: root/test/fuse/linux/read_test.cc
diff options
context:
space:
mode:
Diffstat (limited to 'test/fuse/linux/read_test.cc')
-rw-r--r--test/fuse/linux/read_test.cc390
1 files changed, 390 insertions, 0 deletions
diff --git a/test/fuse/linux/read_test.cc b/test/fuse/linux/read_test.cc
new file mode 100644
index 000000000..c702651bd
--- /dev/null
+++ b/test/fuse/linux/read_test.cc
@@ -0,0 +1,390 @@
+// 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 <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include "gtest/gtest.h"
+#include "test/fuse/linux/fuse_base.h"
+#include "test/util/fuse_util.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+class ReadTest : public FuseTest {
+ void SetUp() override {
+ FuseTest::SetUp();
+ test_file_path_ = JoinPath(mount_point_.path().c_str(), test_file_);
+ }
+
+ // TearDown overrides the parent's function
+ // to skip checking the unconsumed release request at the end.
+ void TearDown() override { UnmountFuse(); }
+
+ protected:
+ const std::string test_file_ = "test_file";
+ const mode_t test_file_mode_ = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO;
+ const uint64_t test_fh_ = 1;
+ const uint32_t open_flag_ = O_RDWR;
+
+ std::string test_file_path_;
+
+ PosixErrorOr<FileDescriptor> OpenTestFile(const std::string &path,
+ uint64_t size = 512) {
+ SetServerInodeLookup(test_file_, test_file_mode_, size);
+
+ struct fuse_out_header out_header_open = {
+ .len = sizeof(struct fuse_out_header) + sizeof(struct fuse_open_out),
+ };
+ struct fuse_open_out out_payload_open = {
+ .fh = test_fh_,
+ .open_flags = open_flag_,
+ };
+ auto iov_out_open = FuseGenerateIovecs(out_header_open, out_payload_open);
+ SetServerResponse(FUSE_OPEN, iov_out_open);
+
+ auto res = Open(path.c_str(), open_flag_);
+ if (res.ok()) {
+ SkipServerActualRequest();
+ }
+ return res;
+ }
+};
+
+class ReadTestSmallMaxRead : public ReadTest {
+ void SetUp() override {
+ MountFuse(mountOpts);
+ SetUpFuseServer();
+ test_file_path_ = JoinPath(mount_point_.path().c_str(), test_file_);
+ }
+
+ protected:
+ constexpr static char mountOpts[] =
+ "rootmode=755,user_id=0,group_id=0,max_read=4096";
+ // 4096 is hard-coded as the max_read in mount options.
+ const int size_fragment = 4096;
+};
+
+TEST_F(ReadTest, ReadWhole) {
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_));
+
+ // Prepare for the read.
+ const int n_read = 5;
+ std::vector<char> data(n_read);
+ RandomizeBuffer(data.data(), data.size());
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+ SetServerResponse(FUSE_READ, iov_out_read);
+
+ // Read the whole "file".
+ std::vector<char> buf(n_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), n_read),
+ SyscallSucceedsWithValue(n_read));
+
+ // Check the read request.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+ GetServerActualRequest(iov_in);
+
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, 0);
+ EXPECT_EQ(buf, data);
+}
+
+TEST_F(ReadTest, ReadPartial) {
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_));
+
+ // Prepare for the read.
+ const int n_data = 10;
+ std::vector<char> data(n_data);
+ RandomizeBuffer(data.data(), data.size());
+ // Note: due to read ahead, current read implementation will treat any
+ // response that is longer than requested as correct (i.e. not reach the EOF).
+ // Therefore, the test below should make sure the size to read does not exceed
+ // n_data.
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+
+ std::vector<char> buf(n_data);
+
+ // Read 1 bytes.
+ SetServerResponse(FUSE_READ, iov_out_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), 1), SyscallSucceedsWithValue(1));
+
+ // Check the 1-byte read request.
+ GetServerActualRequest(iov_in);
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, 0);
+
+ // Read 3 bytes.
+ SetServerResponse(FUSE_READ, iov_out_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), 3), SyscallSucceedsWithValue(3));
+
+ // Check the 3-byte read request.
+ GetServerActualRequest(iov_in);
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_payload_read.offset, 1);
+
+ // Read 5 bytes.
+ SetServerResponse(FUSE_READ, iov_out_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), 5), SyscallSucceedsWithValue(5));
+
+ // Check the 5-byte read request.
+ GetServerActualRequest(iov_in);
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_payload_read.offset, 4);
+}
+
+TEST_F(ReadTest, PRead) {
+ const int file_size = 512;
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_, file_size));
+
+ // Prepare for the read.
+ const int n_read = 5;
+ std::vector<char> data(n_read);
+ RandomizeBuffer(data.data(), data.size());
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+ SetServerResponse(FUSE_READ, iov_out_read);
+
+ // Read some bytes.
+ std::vector<char> buf(n_read);
+ const int offset_read = file_size >> 1;
+ EXPECT_THAT(pread(fd.get(), buf.data(), n_read, offset_read),
+ SyscallSucceedsWithValue(n_read));
+
+ // Check the read request.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+ GetServerActualRequest(iov_in);
+
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, offset_read);
+ EXPECT_EQ(buf, data);
+}
+
+TEST_F(ReadTest, ReadZero) {
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_));
+
+ // Issue the read.
+ std::vector<char> buf;
+ EXPECT_THAT(read(fd.get(), buf.data(), 0), SyscallSucceedsWithValue(0));
+}
+
+TEST_F(ReadTest, ReadShort) {
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_));
+
+ // Prepare for the short read.
+ const int n_read = 5;
+ std::vector<char> data(n_read >> 1);
+ RandomizeBuffer(data.data(), data.size());
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+ SetServerResponse(FUSE_READ, iov_out_read);
+
+ // Read the whole "file".
+ std::vector<char> buf(n_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), n_read),
+ SyscallSucceedsWithValue(data.size()));
+
+ // Check the read request.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+ GetServerActualRequest(iov_in);
+
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, 0);
+ std::vector<char> short_buf(buf.begin(), buf.begin() + data.size());
+ EXPECT_EQ(short_buf, data);
+}
+
+TEST_F(ReadTest, ReadShortEOF) {
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_));
+
+ // Prepare for the short read.
+ struct fuse_out_header out_header_read = {
+ .len = static_cast<uint32_t>(sizeof(struct fuse_out_header)),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read);
+ SetServerResponse(FUSE_READ, iov_out_read);
+
+ // Read the whole "file".
+ const int n_read = 10;
+ std::vector<char> buf(n_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), n_read), SyscallSucceedsWithValue(0));
+
+ // Check the read request.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+ GetServerActualRequest(iov_in);
+
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, 0);
+}
+
+TEST_F(ReadTestSmallMaxRead, ReadSmallMaxRead) {
+ const int n_fragment = 10;
+ const int n_read = size_fragment * n_fragment;
+
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_, n_read));
+
+ // Prepare for the read.
+ std::vector<char> data(size_fragment);
+ RandomizeBuffer(data.data(), data.size());
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+
+ for (int i = 0; i < n_fragment; ++i) {
+ SetServerResponse(FUSE_READ, iov_out_read);
+ }
+
+ // Read the whole "file".
+ std::vector<char> buf(n_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), n_read),
+ SyscallSucceedsWithValue(n_read));
+
+ ASSERT_EQ(GetServerNumUnsentResponses(), 0);
+ ASSERT_EQ(GetServerNumUnconsumedRequests(), n_fragment);
+
+ // Check each read segment.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+
+ for (int i = 0; i < n_fragment; ++i) {
+ GetServerActualRequest(iov_in);
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, i * size_fragment);
+ EXPECT_EQ(in_payload_read.size, size_fragment);
+
+ auto it = buf.begin() + i * size_fragment;
+ EXPECT_EQ(std::vector<char>(it, it + size_fragment), data);
+ }
+}
+
+TEST_F(ReadTestSmallMaxRead, ReadSmallMaxReadShort) {
+ const int n_fragment = 10;
+ const int n_read = size_fragment * n_fragment;
+
+ auto fd = ASSERT_NO_ERRNO_AND_VALUE(OpenTestFile(test_file_path_, n_read));
+
+ // Prepare for the read.
+ std::vector<char> data(size_fragment);
+ RandomizeBuffer(data.data(), data.size());
+ struct fuse_out_header out_header_read = {
+ .len =
+ static_cast<uint32_t>(sizeof(struct fuse_out_header) + data.size()),
+ };
+ auto iov_out_read = FuseGenerateIovecs(out_header_read, data);
+
+ for (int i = 0; i < n_fragment - 1; ++i) {
+ SetServerResponse(FUSE_READ, iov_out_read);
+ }
+
+ // The last fragment is a short read.
+ std::vector<char> half_data(data.begin(), data.begin() + (data.size() >> 1));
+ struct fuse_out_header out_header_read_short = {
+ .len = static_cast<uint32_t>(sizeof(struct fuse_out_header) +
+ half_data.size()),
+ };
+ auto iov_out_read_short =
+ FuseGenerateIovecs(out_header_read_short, half_data);
+ SetServerResponse(FUSE_READ, iov_out_read_short);
+
+ // Read the whole "file".
+ std::vector<char> buf(n_read);
+ EXPECT_THAT(read(fd.get(), buf.data(), n_read),
+ SyscallSucceedsWithValue(n_read - (data.size() >> 1)));
+
+ ASSERT_EQ(GetServerNumUnsentResponses(), 0);
+ ASSERT_EQ(GetServerNumUnconsumedRequests(), n_fragment);
+
+ // Check each read segment.
+ struct fuse_in_header in_header_read;
+ struct fuse_read_in in_payload_read;
+ auto iov_in = FuseGenerateIovecs(in_header_read, in_payload_read);
+
+ for (int i = 0; i < n_fragment; ++i) {
+ GetServerActualRequest(iov_in);
+ EXPECT_EQ(in_payload_read.fh, test_fh_);
+ EXPECT_EQ(in_header_read.len,
+ sizeof(in_header_read) + sizeof(in_payload_read));
+ EXPECT_EQ(in_header_read.opcode, FUSE_READ);
+ EXPECT_EQ(in_payload_read.offset, i * size_fragment);
+ EXPECT_EQ(in_payload_read.size, size_fragment);
+
+ auto it = buf.begin() + i * size_fragment;
+ if (i != n_fragment - 1) {
+ EXPECT_EQ(std::vector<char>(it, it + data.size()), data);
+ } else {
+ EXPECT_EQ(std::vector<char>(it, it + half_data.size()), half_data);
+ }
+ }
+}
+
+} // namespace
+
+} // namespace testing
+} // namespace gvisor \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 16:21:52 +0000