Peter Maydell | 4459bf3 | 2016-01-29 17:49:58 +0000 | [diff] [blame] | 1 | #include "qemu/osdep.h" |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 2 | #include <glib.h> |
| 3 | #include <termios.h> |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 4 | #include "qapi/error.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 5 | #include "qemu/sockets.h" |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 6 | #include "qga/channel.h" |
| 7 | |
Andreas Färber | e61ab1d | 2012-04-30 18:00:54 +0200 | [diff] [blame] | 8 | #ifdef CONFIG_SOLARIS |
| 9 | #include <stropts.h> |
| 10 | #endif |
| 11 | |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 12 | #define GA_CHANNEL_BAUDRATE_DEFAULT B38400 /* for isa-serial channels */ |
| 13 | |
| 14 | struct GAChannel { |
| 15 | GIOChannel *listen_channel; |
| 16 | GIOChannel *client_channel; |
| 17 | GAChannelMethod method; |
| 18 | GAChannelCallback event_cb; |
| 19 | gpointer user_data; |
| 20 | }; |
| 21 | |
| 22 | static int ga_channel_client_add(GAChannel *c, int fd); |
| 23 | |
| 24 | static gboolean ga_channel_listen_accept(GIOChannel *channel, |
| 25 | GIOCondition condition, gpointer data) |
| 26 | { |
| 27 | GAChannel *c = data; |
| 28 | int ret, client_fd; |
| 29 | bool accepted = false; |
| 30 | struct sockaddr_un addr; |
| 31 | socklen_t addrlen = sizeof(addr); |
| 32 | |
| 33 | g_assert(channel != NULL); |
| 34 | |
| 35 | client_fd = qemu_accept(g_io_channel_unix_get_fd(channel), |
| 36 | (struct sockaddr *)&addr, &addrlen); |
| 37 | if (client_fd == -1) { |
| 38 | g_warning("error converting fd to gsocket: %s", strerror(errno)); |
| 39 | goto out; |
| 40 | } |
Gonglei | 16b3808 | 2014-08-11 17:34:21 +0800 | [diff] [blame] | 41 | qemu_set_nonblock(client_fd); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 42 | ret = ga_channel_client_add(c, client_fd); |
| 43 | if (ret) { |
| 44 | g_warning("error setting up connection"); |
Markus Armbruster | 32c1662 | 2013-01-11 11:25:00 +0100 | [diff] [blame] | 45 | close(client_fd); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 46 | goto out; |
| 47 | } |
| 48 | accepted = true; |
| 49 | |
| 50 | out: |
| 51 | /* only accept 1 connection at a time */ |
| 52 | return !accepted; |
| 53 | } |
| 54 | |
| 55 | /* start polling for readable events on listen fd, new==true |
| 56 | * indicates we should use the existing s->listen_channel |
| 57 | */ |
| 58 | static void ga_channel_listen_add(GAChannel *c, int listen_fd, bool create) |
| 59 | { |
| 60 | if (create) { |
| 61 | c->listen_channel = g_io_channel_unix_new(listen_fd); |
| 62 | } |
| 63 | g_io_add_watch(c->listen_channel, G_IO_IN, ga_channel_listen_accept, c); |
| 64 | } |
| 65 | |
| 66 | static void ga_channel_listen_close(GAChannel *c) |
| 67 | { |
| 68 | g_assert(c->method == GA_CHANNEL_UNIX_LISTEN); |
| 69 | g_assert(c->listen_channel); |
| 70 | g_io_channel_shutdown(c->listen_channel, true, NULL); |
| 71 | g_io_channel_unref(c->listen_channel); |
| 72 | c->listen_channel = NULL; |
| 73 | } |
| 74 | |
| 75 | /* cleanup state for closed connection/session, start accepting new |
| 76 | * connections if we're in listening mode |
| 77 | */ |
| 78 | static void ga_channel_client_close(GAChannel *c) |
| 79 | { |
| 80 | g_assert(c->client_channel); |
| 81 | g_io_channel_shutdown(c->client_channel, true, NULL); |
| 82 | g_io_channel_unref(c->client_channel); |
| 83 | c->client_channel = NULL; |
| 84 | if (c->method == GA_CHANNEL_UNIX_LISTEN && c->listen_channel) { |
| 85 | ga_channel_listen_add(c, 0, false); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | static gboolean ga_channel_client_event(GIOChannel *channel, |
| 90 | GIOCondition condition, gpointer data) |
| 91 | { |
| 92 | GAChannel *c = data; |
| 93 | gboolean client_cont; |
| 94 | |
| 95 | g_assert(c); |
| 96 | if (c->event_cb) { |
| 97 | client_cont = c->event_cb(condition, c->user_data); |
| 98 | if (!client_cont) { |
| 99 | ga_channel_client_close(c); |
| 100 | return false; |
| 101 | } |
| 102 | } |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | static int ga_channel_client_add(GAChannel *c, int fd) |
| 107 | { |
| 108 | GIOChannel *client_channel; |
| 109 | GError *err = NULL; |
| 110 | |
| 111 | g_assert(c && !c->client_channel); |
| 112 | client_channel = g_io_channel_unix_new(fd); |
| 113 | g_assert(client_channel); |
| 114 | g_io_channel_set_encoding(client_channel, NULL, &err); |
| 115 | if (err != NULL) { |
| 116 | g_warning("error setting channel encoding to binary"); |
| 117 | g_error_free(err); |
| 118 | return -1; |
| 119 | } |
| 120 | g_io_add_watch(client_channel, G_IO_IN | G_IO_HUP, |
| 121 | ga_channel_client_event, c); |
| 122 | c->client_channel = client_channel; |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | static gboolean ga_channel_open(GAChannel *c, const gchar *path, GAChannelMethod method) |
| 127 | { |
| 128 | int ret; |
| 129 | c->method = method; |
| 130 | |
| 131 | switch (c->method) { |
| 132 | case GA_CHANNEL_VIRTIO_SERIAL: { |
Andreas Färber | e61ab1d | 2012-04-30 18:00:54 +0200 | [diff] [blame] | 133 | int fd = qemu_open(path, O_RDWR | O_NONBLOCK |
| 134 | #ifndef CONFIG_SOLARIS |
| 135 | | O_ASYNC |
| 136 | #endif |
| 137 | ); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 138 | if (fd == -1) { |
| 139 | g_critical("error opening channel: %s", strerror(errno)); |
Markus Armbruster | 7868181 | 2013-01-11 11:25:02 +0100 | [diff] [blame] | 140 | return false; |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 141 | } |
Andreas Färber | e61ab1d | 2012-04-30 18:00:54 +0200 | [diff] [blame] | 142 | #ifdef CONFIG_SOLARIS |
| 143 | ret = ioctl(fd, I_SETSIG, S_OUTPUT | S_INPUT | S_HIPRI); |
| 144 | if (ret == -1) { |
| 145 | g_critical("error setting event mask for channel: %s", |
| 146 | strerror(errno)); |
Markus Armbruster | 7868181 | 2013-01-11 11:25:02 +0100 | [diff] [blame] | 147 | close(fd); |
| 148 | return false; |
Andreas Färber | e61ab1d | 2012-04-30 18:00:54 +0200 | [diff] [blame] | 149 | } |
| 150 | #endif |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 151 | ret = ga_channel_client_add(c, fd); |
| 152 | if (ret) { |
| 153 | g_critical("error adding channel to main loop"); |
Markus Armbruster | d4f4a3e | 2013-01-11 11:25:01 +0100 | [diff] [blame] | 154 | close(fd); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 155 | return false; |
| 156 | } |
| 157 | break; |
| 158 | } |
| 159 | case GA_CHANNEL_ISA_SERIAL: { |
| 160 | struct termios tio; |
| 161 | int fd = qemu_open(path, O_RDWR | O_NOCTTY | O_NONBLOCK); |
| 162 | if (fd == -1) { |
| 163 | g_critical("error opening channel: %s", strerror(errno)); |
Markus Armbruster | 7868181 | 2013-01-11 11:25:02 +0100 | [diff] [blame] | 164 | return false; |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 165 | } |
| 166 | tcgetattr(fd, &tio); |
| 167 | /* set up serial port for non-canonical, dumb byte streaming */ |
| 168 | tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP | |
| 169 | INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY | |
| 170 | IMAXBEL); |
| 171 | tio.c_oflag = 0; |
| 172 | tio.c_lflag = 0; |
| 173 | tio.c_cflag |= GA_CHANNEL_BAUDRATE_DEFAULT; |
| 174 | /* 1 available byte min or reads will block (we'll set non-blocking |
| 175 | * elsewhere, else we have to deal with read()=0 instead) |
| 176 | */ |
| 177 | tio.c_cc[VMIN] = 1; |
| 178 | tio.c_cc[VTIME] = 0; |
| 179 | /* flush everything waiting for read/xmit, it's garbage at this point */ |
| 180 | tcflush(fd, TCIFLUSH); |
| 181 | tcsetattr(fd, TCSANOW, &tio); |
| 182 | ret = ga_channel_client_add(c, fd); |
| 183 | if (ret) { |
Markus Armbruster | 7868181 | 2013-01-11 11:25:02 +0100 | [diff] [blame] | 184 | g_critical("error adding channel to main loop"); |
| 185 | close(fd); |
| 186 | return false; |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 187 | } |
| 188 | break; |
| 189 | } |
| 190 | case GA_CHANNEL_UNIX_LISTEN: { |
Paolo Bonzini | 9011981 | 2012-10-02 10:09:14 +0200 | [diff] [blame] | 191 | Error *local_err = NULL; |
| 192 | int fd = unix_listen(path, NULL, strlen(path), &local_err); |
| 193 | if (local_err != NULL) { |
| 194 | g_critical("%s", error_get_pretty(local_err)); |
| 195 | error_free(local_err); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 196 | return false; |
| 197 | } |
| 198 | ga_channel_listen_add(c, fd, true); |
| 199 | break; |
| 200 | } |
| 201 | default: |
| 202 | g_critical("error binding/listening to specified socket"); |
| 203 | return false; |
| 204 | } |
| 205 | |
| 206 | return true; |
| 207 | } |
| 208 | |
| 209 | GIOStatus ga_channel_write_all(GAChannel *c, const gchar *buf, gsize size) |
| 210 | { |
| 211 | GError *err = NULL; |
| 212 | gsize written = 0; |
| 213 | GIOStatus status = G_IO_STATUS_NORMAL; |
| 214 | |
| 215 | while (size) { |
Yuri Pudgorodskiy | f74df9b | 2015-10-13 18:41:22 +0300 | [diff] [blame] | 216 | g_debug("sending data, count: %d", (int)size); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 217 | status = g_io_channel_write_chars(c->client_channel, buf, size, |
| 218 | &written, &err); |
Yuri Pudgorodskiy | f74df9b | 2015-10-13 18:41:22 +0300 | [diff] [blame] | 219 | if (status == G_IO_STATUS_NORMAL) { |
| 220 | size -= written; |
| 221 | buf += written; |
| 222 | } else if (status != G_IO_STATUS_AGAIN) { |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 223 | g_warning("error writing to channel: %s", err->message); |
Yuri Pudgorodskiy | f74df9b | 2015-10-13 18:41:22 +0300 | [diff] [blame] | 224 | return status; |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 225 | } |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 226 | } |
| 227 | |
Yuri Pudgorodskiy | f74df9b | 2015-10-13 18:41:22 +0300 | [diff] [blame] | 228 | do { |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 229 | status = g_io_channel_flush(c->client_channel, &err); |
Yuri Pudgorodskiy | f74df9b | 2015-10-13 18:41:22 +0300 | [diff] [blame] | 230 | } while (status == G_IO_STATUS_AGAIN); |
| 231 | |
| 232 | if (status != G_IO_STATUS_NORMAL) { |
| 233 | g_warning("error flushing channel: %s", err->message); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | return status; |
| 237 | } |
| 238 | |
| 239 | GIOStatus ga_channel_read(GAChannel *c, gchar *buf, gsize size, gsize *count) |
| 240 | { |
| 241 | return g_io_channel_read_chars(c->client_channel, buf, size, count, NULL); |
| 242 | } |
| 243 | |
| 244 | GAChannel *ga_channel_new(GAChannelMethod method, const gchar *path, |
| 245 | GAChannelCallback cb, gpointer opaque) |
| 246 | { |
Markus Armbruster | f3a0640 | 2015-09-14 13:50:44 +0200 | [diff] [blame] | 247 | GAChannel *c = g_new0(GAChannel, 1); |
Michael Roth | 125b310 | 2012-01-19 00:18:20 -0600 | [diff] [blame] | 248 | c->event_cb = cb; |
| 249 | c->user_data = opaque; |
| 250 | |
| 251 | if (!ga_channel_open(c, path, method)) { |
| 252 | g_critical("error opening channel"); |
| 253 | ga_channel_free(c); |
| 254 | return NULL; |
| 255 | } |
| 256 | |
| 257 | return c; |
| 258 | } |
| 259 | |
| 260 | void ga_channel_free(GAChannel *c) |
| 261 | { |
| 262 | if (c->method == GA_CHANNEL_UNIX_LISTEN |
| 263 | && c->listen_channel) { |
| 264 | ga_channel_listen_close(c); |
| 265 | } |
| 266 | if (c->client_channel) { |
| 267 | ga_channel_client_close(c); |
| 268 | } |
| 269 | g_free(c); |
| 270 | } |