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/option.h" 28 #include "chardev/char.h" 29 30 #ifdef _WIN32 31 #include "chardev/char-win.h" 32 #else 33 #include "chardev/char-fd.h" 34 #endif 35 36 #ifdef _WIN32 37 #define MAXCONNECT 1 38 #define NTIMEOUT 5000 39 40 static int win_chr_pipe_init(Chardev *chr, const char *filename, 41 Error **errp) 42 { 43 WinChardev *s = WIN_CHARDEV(chr); 44 OVERLAPPED ov; 45 int ret; 46 DWORD size; 47 char *openname; 48 49 s->fpipe = TRUE; 50 51 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); 52 if (!s->hsend) { 53 error_setg(errp, "Failed CreateEvent"); 54 goto fail; 55 } 56 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); 57 if (!s->hrecv) { 58 error_setg(errp, "Failed CreateEvent"); 59 goto fail; 60 } 61 62 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename); 63 s->file = CreateNamedPipe(openname, 64 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, 65 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | 66 PIPE_WAIT, 67 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); 68 g_free(openname); 69 if (s->file == INVALID_HANDLE_VALUE) { 70 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError()); 71 s->file = NULL; 72 goto fail; 73 } 74 75 ZeroMemory(&ov, sizeof(ov)); 76 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); 77 ret = ConnectNamedPipe(s->file, &ov); 78 if (ret) { 79 error_setg(errp, "Failed ConnectNamedPipe"); 80 goto fail; 81 } 82 83 ret = GetOverlappedResult(s->file, &ov, &size, TRUE); 84 if (!ret) { 85 error_setg(errp, "Failed GetOverlappedResult"); 86 if (ov.hEvent) { 87 CloseHandle(ov.hEvent); 88 ov.hEvent = NULL; 89 } 90 goto fail; 91 } 92 93 if (ov.hEvent) { 94 CloseHandle(ov.hEvent); 95 ov.hEvent = NULL; 96 } 97 qemu_add_polling_cb(win_chr_pipe_poll, chr); 98 return 0; 99 100 fail: 101 return -1; 102 } 103 104 static void qemu_chr_open_pipe(Chardev *chr, 105 ChardevBackend *backend, 106 bool *be_opened, 107 Error **errp) 108 { 109 ChardevHostdev *opts = backend->u.pipe.data; 110 const char *filename = opts->device; 111 112 if (win_chr_pipe_init(chr, filename, errp) < 0) { 113 return; 114 } 115 } 116 117 #else 118 119 static void qemu_chr_open_pipe(Chardev *chr, 120 ChardevBackend *backend, 121 bool *be_opened, 122 Error **errp) 123 { 124 ChardevHostdev *opts = backend->u.pipe.data; 125 int fd_in, fd_out; 126 char *filename_in; 127 char *filename_out; 128 const char *filename = opts->device; 129 130 filename_in = g_strdup_printf("%s.in", filename); 131 filename_out = g_strdup_printf("%s.out", filename); 132 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY)); 133 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY)); 134 g_free(filename_in); 135 g_free(filename_out); 136 if (fd_in < 0 || fd_out < 0) { 137 if (fd_in >= 0) { 138 close(fd_in); 139 } 140 if (fd_out >= 0) { 141 close(fd_out); 142 } 143 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); 144 if (fd_in < 0) { 145 error_setg_file_open(errp, errno, filename); 146 return; 147 } 148 } 149 qemu_chr_open_fd(chr, fd_in, fd_out); 150 } 151 152 #endif /* !_WIN32 */ 153 154 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, 155 Error **errp) 156 { 157 const char *device = qemu_opt_get(opts, "path"); 158 ChardevHostdev *dev; 159 160 if (device == NULL) { 161 error_setg(errp, "chardev: pipe: no device path given"); 162 return; 163 } 164 backend->type = CHARDEV_BACKEND_KIND_PIPE; 165 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); 166 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); 167 dev->device = g_strdup(device); 168 } 169 170 static void char_pipe_class_init(ObjectClass *oc, void *data) 171 { 172 ChardevClass *cc = CHARDEV_CLASS(oc); 173 174 cc->parse = qemu_chr_parse_pipe; 175 cc->open = qemu_chr_open_pipe; 176 } 177 178 static const TypeInfo char_pipe_type_info = { 179 .name = TYPE_CHARDEV_PIPE, 180 #ifdef _WIN32 181 .parent = TYPE_CHARDEV_WIN, 182 #else 183 .parent = TYPE_CHARDEV_FD, 184 #endif 185 .class_init = char_pipe_class_init, 186 }; 187 188 static void register_types(void) 189 { 190 type_register_static(&char_pipe_type_info); 191 } 192 193 type_init(register_types); 194