1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// Copyright 2018 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 <arpa/inet.h>
#include <netinet/in.h>
#include <sys/sendfile.h>
#include <sys/socket.h>
#include <unistd.h>
#include <iostream>
#include <vector>
#include "gtest/gtest.h"
#include "absl/strings/string_view.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
#include "test/util/thread_util.h"
namespace gvisor {
namespace testing {
namespace {
// Sends large file to exercise the path that read and writes data multiple
// times, esp. when more data is read than can be written.
TEST(SendFileTest, SendMultiple) {
std::vector<char> data(5 * 1024 * 1024);
RandomizeBuffer(data.data(), data.size());
// Create temp files.
const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
GetAbsoluteTestTmpdir(), absl::string_view(data.data(), data.size()),
TempPath::kDefaultFileMode));
const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
// Use a socket for target file to make the write window small.
const FileDescriptor server(socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
ASSERT_THAT(server.get(), SyscallSucceeds());
struct sockaddr_in server_addr = {};
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = INADDR_ANY;
ASSERT_THAT(
bind(server.get(), reinterpret_cast<struct sockaddr *>(&server_addr),
sizeof(server_addr)),
SyscallSucceeds());
ASSERT_THAT(listen(server.get(), 1), SyscallSucceeds());
// Thread that reads data from socket and dumps to a file.
ScopedThread th([&server, &out_file, &server_addr] {
socklen_t addrlen = sizeof(server_addr);
const FileDescriptor fd(RetryEINTR(accept)(
server.get(), reinterpret_cast<struct sockaddr *>(&server_addr),
&addrlen));
ASSERT_THAT(fd.get(), SyscallSucceeds());
FileDescriptor outf =
ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
// Read until socket is closed.
char buf[10240];
for (int cnt = 0;; cnt++) {
int r = RetryEINTR(read)(fd.get(), buf, sizeof(buf));
// We cannot afford to save on every read() call.
if (cnt % 1000 == 0) {
ASSERT_THAT(r, SyscallSucceeds());
} else {
const DisableSave ds;
ASSERT_THAT(r, SyscallSucceeds());
}
if (r == 0) {
// EOF
break;
}
int w = RetryEINTR(write)(outf.get(), buf, r);
// We cannot afford to save on every write() call.
if (cnt % 1010 == 0) {
ASSERT_THAT(w, SyscallSucceedsWithValue(r));
} else {
const DisableSave ds;
ASSERT_THAT(w, SyscallSucceedsWithValue(r));
}
}
});
// Open the input file as read only.
const FileDescriptor inf =
ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
FileDescriptor outf(socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
ASSERT_THAT(outf.get(), SyscallSucceeds());
// Get the port bound by the listening socket.
socklen_t addrlen = sizeof(server_addr);
ASSERT_THAT(getsockname(server.get(),
reinterpret_cast<sockaddr *>(&server_addr), &addrlen),
SyscallSucceeds());
struct sockaddr_in addr = {};
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = server_addr.sin_port;
std::cout << "Connecting on port=" << server_addr.sin_port;
ASSERT_THAT(
RetryEINTR(connect)(
outf.get(), reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr)),
SyscallSucceeds());
int cnt = 0;
for (size_t sent = 0; sent < data.size(); cnt++) {
const size_t remain = data.size() - sent;
std::cout << "sendfile, size=" << data.size() << ", sent=" << sent
<< ", remain=" << remain;
// Send data and verify that sendfile returns the correct value.
int res = sendfile(outf.get(), inf.get(), nullptr, remain);
// We cannot afford to save on every sendfile() call.
if (cnt % 120 == 0) {
MaybeSave();
}
if (res == 0) {
// EOF
break;
}
if (res > 0) {
sent += res;
} else {
ASSERT_TRUE(errno == EINTR || errno == EAGAIN) << "errno=" << errno;
}
}
// Close socket to stop thread.
outf.reset();
th.Join();
// Verify that the output file has the correct data.
outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
std::vector<char> actual(data.size(), '\0');
ASSERT_THAT(RetryEINTR(read)(outf.get(), actual.data(), actual.size()),
SyscallSucceedsWithValue(actual.size()));
ASSERT_EQ(memcmp(data.data(), actual.data(), data.size()), 0);
}
} // namespace
} // namespace testing
} // namespace gvisor
|
