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/module.h" 28 #include "qemu/option.h" 29 #include "chardev/char.h" 30 31 #ifdef _WIN32 32 #include "chardev/char-win.h" 33 #else 34 #include "chardev/char-fd.h" 35 #endif 36 37 #ifdef _WIN32 38 #define MAXCONNECT 1 39 #define NTIMEOUT 5000 40 41 static int win_chr_pipe_init(Chardev *chr, const char *filename, 42 Error **errp) 43 { 44 WinChardev *s = WIN_CHARDEV(chr); 45 OVERLAPPED ov; 46 int ret; 47 DWORD size; 48 char *openname; 49 50 s->fpipe = TRUE; 51 52 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); 53 if (!s->hsend) { 54 error_setg(errp, "Failed CreateEvent"); 55 goto fail; 56 } 57 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); 58 if (!s->hrecv) { 59 error_setg(errp, "Failed CreateEvent"); 60 goto fail; 61 } 62 63 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename); 64 s->file = CreateNamedPipe(openname, 65 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, 66 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | 67 PIPE_WAIT, 68 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); 69 g_free(openname); 70 if (s->file == INVALID_HANDLE_VALUE) { 71 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError()); 72 s->file = NULL; 73 goto fail; 74 } 75 76 ZeroMemory(&ov, sizeof(ov)); 77 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); 78 ret = ConnectNamedPipe(s->file, &ov); 79 if (ret) { 80 error_setg(errp, "Failed ConnectNamedPipe"); 81 goto fail; 82 } 83 84 ret = GetOverlappedResult(s->file, &ov, &size, TRUE); 85 if (!ret) { 86 error_setg(errp, "Failed GetOverlappedResult"); 87 if (ov.hEvent) { 88 CloseHandle(ov.hEvent); 89 ov.hEvent = NULL; 90 } 91 goto fail; 92 } 93 94 if (ov.hEvent) { 95 CloseHandle(ov.hEvent); 96 ov.hEvent = NULL; 97 } 98 qemu_add_polling_cb(win_chr_pipe_poll, chr); 99 return 0; 100 101 fail: 102 return -1; 103 } 104 105 static void qemu_chr_open_pipe(Chardev *chr, 106 ChardevBackend *backend, 107 bool *be_opened, 108 Error **errp) 109 { 110 ChardevHostdev *opts = backend->u.pipe.data; 111 const char *filename = opts->device; 112 113 if (win_chr_pipe_init(chr, filename, errp) < 0) { 114 return; 115 } 116 } 117 118 #else 119 120 static void qemu_chr_open_pipe(Chardev *chr, 121 ChardevBackend *backend, 122 bool *be_opened, 123 Error **errp) 124 { 125 ChardevHostdev *opts = backend->u.pipe.data; 126 int fd_in, fd_out; 127 char *filename_in; 128 char *filename_out; 129 const char *filename = opts->device; 130 131 filename_in = g_strdup_printf("%s.in", filename); 132 filename_out = g_strdup_printf("%s.out", filename); 133 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY)); 134 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY)); 135 g_free(filename_in); 136 g_free(filename_out); 137 if (fd_in < 0 || fd_out < 0) { 138 if (fd_in >= 0) { 139 close(fd_in); 140 } 141 if (fd_out >= 0) { 142 close(fd_out); 143 } 144 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); 145 if (fd_in < 0) { 146 error_setg_file_open(errp, errno, filename); 147 return; 148 } 149 } 150 qemu_chr_open_fd(chr, fd_in, fd_out); 151 } 152 153 #endif /* !_WIN32 */ 154 155 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, 156 Error **errp) 157 { 158 const char *device = qemu_opt_get(opts, "path"); 159 ChardevHostdev *dev; 160 161 if (device == NULL) { 162 error_setg(errp, "chardev: pipe: no device path given"); 163 return; 164 } 165 backend->type = CHARDEV_BACKEND_KIND_PIPE; 166 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); 167 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); 168 dev->device = g_strdup(device); 169 } 170 171 static void char_pipe_class_init(ObjectClass *oc, void *data) 172 { 173 ChardevClass *cc = CHARDEV_CLASS(oc); 174 175 cc->parse = qemu_chr_parse_pipe; 176 cc->open = qemu_chr_open_pipe; 177 } 178 179 static const TypeInfo char_pipe_type_info = { 180 .name = TYPE_CHARDEV_PIPE, 181 #ifdef _WIN32 182 .parent = TYPE_CHARDEV_WIN, 183 #else 184 .parent = TYPE_CHARDEV_FD, 185 #endif 186 .class_init = char_pipe_class_init, 187 }; 188 189 static void register_types(void) 190 { 191 type_register_static(&char_pipe_type_info); 192 } 193 194 type_init(register_types); 195