@samitouri / QOSamiQemu
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1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "qemu/main-loop.h"
28 #include "qemu/module.h"
29 #include "qemu/option.h"
30 #include "chardev/char.h"
31
32 #ifdef _WIN32
33 #include "chardev/char-win.h"
34 #else
35 #include "chardev/char-fd.h"
36 #endif
37
38 #ifdef _WIN32
39 #define MAXCONNECT 1
40 #define NTIMEOUT 5000
41
42 static int win_chr_pipe_init(Chardev *chr, const char *filename,
43 Error **errp)
44 {
45 WinChardev *s = WIN_CHARDEV(chr);
46 OVERLAPPED ov;
47 int ret;
48 DWORD size;
49 char *openname;
50
51 s->fpipe = TRUE;
52
53 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
54 if (!s->hsend) {
55 error_setg(errp, "Failed CreateEvent");
56 goto fail;
57 }
58 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
59 if (!s->hrecv) {
60 error_setg(errp, "Failed CreateEvent");
61 goto fail;
62 }
63
64 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
65 s->file = CreateNamedPipe(openname,
66 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
67 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
68 PIPE_WAIT,
69 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
70 g_free(openname);
71 if (s->file == INVALID_HANDLE_VALUE) {
72 error_setg_win32(errp, GetLastError(), "Failed CreateNamedPipe");
73 s->file = NULL;
74 goto fail;
75 }
76
77 ZeroMemory(&ov, sizeof(ov));
78 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
79 ret = ConnectNamedPipe(s->file, &ov);
80 if (ret) {
81 error_setg(errp, "Failed ConnectNamedPipe");
82 goto fail;
83 }
84
85 ret = GetOverlappedResult(s->file, &ov, &size, TRUE);
86 if (!ret) {
87 error_setg(errp, "Failed GetOverlappedResult");
88 if (ov.hEvent) {
89 CloseHandle(ov.hEvent);
90 ov.hEvent = NULL;
91 }
92 goto fail;
93 }
94
95 if (ov.hEvent) {
96 CloseHandle(ov.hEvent);
97 ov.hEvent = NULL;
98 }
99 qemu_add_polling_cb(win_chr_pipe_poll, chr);
100 return 0;
101
102 fail:
103 return -1;
104 }
105
106 static bool pipe_chr_open(Chardev *chr, ChardevBackend *backend, Error **errp)
107 {
108 ChardevHostdev *opts = backend->u.pipe.data;
109 const char *filename = opts->device;
110
111 if (win_chr_pipe_init(chr, filename, errp) < 0) {
112 return false;
113 }
114
115 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
116 return true;
117 }
118
119 #else
120
121 static bool pipe_chr_open(Chardev *chr, ChardevBackend *backend, Error **errp)
122 {
123 ChardevHostdev *opts = backend->u.pipe.data;
124 int fd_in, fd_out;
125 char *filename_in;
126 char *filename_out;
127 const char *filename = opts->device;
128
129 filename_in = g_strdup_printf("%s.in", filename);
130 filename_out = g_strdup_printf("%s.out", filename);
131 fd_in = RETRY_ON_EINTR(qemu_open_old(filename_in, O_RDWR | O_BINARY));
132 fd_out = RETRY_ON_EINTR(qemu_open_old(filename_out, O_RDWR | O_BINARY));
133 g_free(filename_in);
134 g_free(filename_out);
135 if (fd_in < 0 || fd_out < 0) {
136 if (fd_in >= 0) {
137 close(fd_in);
138 }
139 if (fd_out >= 0) {
140 close(fd_out);
141 }
142 fd_in = fd_out = RETRY_ON_EINTR(
143 qemu_open_old(filename, O_RDWR | O_BINARY)
144 );
145 if (fd_in < 0) {
146 error_setg_file_open(errp, errno, filename);
147 return false;
148 }
149 }
150
151 if (!qemu_chr_open_fd(chr, fd_in, fd_out, errp)) {
152 close(fd_in);
153 if (fd_out != fd_in) {
154 close(fd_out);
155 }
156 return false;
157 }
158
159 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
160 return true;
161 }
162
163 #endif /* !_WIN32 */
164
165 static void pipe_chr_parse(QemuOpts *opts, ChardevBackend *backend,
166 Error **errp)
167 {
168 const char *device = qemu_opt_get(opts, "path");
169 ChardevHostdev *dev;
170
171 if (device == NULL) {
172 error_setg(errp, "chardev: pipe: no device path given");
173 return;
174 }
175 backend->type = CHARDEV_BACKEND_KIND_PIPE;
176 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
177 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
178 dev->device = g_strdup(device);
179 }
180
181 static void char_pipe_class_init(ObjectClass *oc, const void *data)
182 {
183 ChardevClass *cc = CHARDEV_CLASS(oc);
184
185 cc->chr_parse = pipe_chr_parse;
186 cc->chr_open = pipe_chr_open;
187 }
188
189 static const TypeInfo char_pipe_type_info = {
190 .name = TYPE_CHARDEV_PIPE,
191 #ifdef _WIN32
192 .parent = TYPE_CHARDEV_WIN,
193 #else
194 .parent = TYPE_CHARDEV_FD,
195 #endif
196 .class_init = char_pipe_class_init,
197 };
198
199 static void register_types(void)
200 {
201 type_register_static(&char_pipe_type_info);
202 }
203
204 type_init(register_types);