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 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 120 121 static 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 fd_in = RETRY_ON_EINTR(qemu_open_old(filename_in, O_RDWR | O_BINARY)); 135 fd_out = RETRY_ON_EINTR(qemu_open_old(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 fd_in = fd_out = RETRY_ON_EINTR( 146 qemu_open_old(filename, O_RDWR | O_BINARY) 147 ); 148 if (fd_in < 0) { 149 error_setg_file_open(errp, errno, filename); 150 return; 151 } 152 } 153 qemu_chr_open_fd(chr, fd_in, fd_out); 154 } 155 156 #endif /* !_WIN32 */ 157 158 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, 159 Error **errp) 160 { 161 const char *device = qemu_opt_get(opts, "path"); 162 ChardevHostdev *dev; 163 164 if (device == NULL) { 165 error_setg(errp, "chardev: pipe: no device path given"); 166 return; 167 } 168 backend->type = CHARDEV_BACKEND_KIND_PIPE; 169 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); 170 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); 171 dev->device = g_strdup(device); 172 } 173 174 static void char_pipe_class_init(ObjectClass *oc, void *data) 175 { 176 ChardevClass *cc = CHARDEV_CLASS(oc); 177 178 cc->parse = qemu_chr_parse_pipe; 179 cc->open = qemu_chr_open_pipe; 180 } 181 182 static const TypeInfo char_pipe_type_info = { 183 .name = TYPE_CHARDEV_PIPE, 184 #ifdef _WIN32 185 .parent = TYPE_CHARDEV_WIN, 186 #else 187 .parent = TYPE_CHARDEV_FD, 188 #endif 189 .class_init = char_pipe_class_init, 190 }; 191 192 static void register_types(void) 193 { 194 type_register_static(&char_pipe_type_info); 195 } 196 197 type_init(register_types); 198