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#include "qemu/osdep.h"
26#include "qemu-common.h"
27#include "qapi/error.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
42static 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(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
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
106static void qemu_chr_open_pipe(Chardev *chr,
107 ChardevBackend *backend,
108 bool *be_opened,
109 Error **errp)
110{
111 ChardevHostdev *opts = backend->u.pipe.data;
112 const char *filename = opts->device;
113
114 if (win_chr_pipe_init(chr, filename, errp) < 0) {
115 return;
116 }
117}
118
119#else
120
121static void qemu_chr_open_pipe(Chardev *chr,
122 ChardevBackend *backend,
123 bool *be_opened,
124 Error **errp)
125{
126 ChardevHostdev *opts = backend->u.pipe.data;
127 int fd_in, fd_out;
128 char *filename_in;
129 char *filename_out;
130 const char *filename = opts->device;
131
132 filename_in = g_strdup_printf("%s.in", filename);
133 filename_out = g_strdup_printf("%s.out", filename);
134 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
135 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
136 g_free(filename_in);
137 g_free(filename_out);
138 if (fd_in < 0 || fd_out < 0) {
139 if (fd_in >= 0) {
140 close(fd_in);
141 }
142 if (fd_out >= 0) {
143 close(fd_out);
144 }
145 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
146 if (fd_in < 0) {
147 error_setg_file_open(errp, errno, filename);
148 return;
149 }
150 }
151 qemu_chr_open_fd(chr, fd_in, fd_out);
152}
153
154#endif
155
156static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
157 Error **errp)
158{
159 const char *device = qemu_opt_get(opts, "path");
160 ChardevHostdev *dev;
161
162 if (device == NULL) {
163 error_setg(errp, "chardev: pipe: no device path given");
164 return;
165 }
166 backend->type = CHARDEV_BACKEND_KIND_PIPE;
167 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
168 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
169 dev->device = g_strdup(device);
170}
171
172static void char_pipe_class_init(ObjectClass *oc, void *data)
173{
174 ChardevClass *cc = CHARDEV_CLASS(oc);
175
176 cc->parse = qemu_chr_parse_pipe;
177 cc->open = qemu_chr_open_pipe;
178}
179
180static const TypeInfo char_pipe_type_info = {
181 .name = TYPE_CHARDEV_PIPE,
182#ifdef _WIN32
183 .parent = TYPE_CHARDEV_WIN,
184#else
185 .parent = TYPE_CHARDEV_FD,
186#endif
187 .class_init = char_pipe_class_init,
188};
189
190static void register_types(void)
191{
192 type_register_static(&char_pipe_type_info);
193}
194
195type_init(register_types);
196