Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 1 | /* |
Michael Roth | 42074a9 | 2012-01-19 22:19:27 -0600 | [diff] [blame] | 2 | * QEMU Guest Agent POSIX-specific command implementations |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 3 | * |
| 4 | * Copyright IBM Corp. 2011 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Michael Roth <mdroth@linux.vnet.ibm.com> |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 8 | * Michal Privoznik <mprivozn@redhat.com> |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 9 | * |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 11 | * See the COPYING file in the top-level directory. |
| 12 | */ |
| 13 | |
| 14 | #include <glib.h> |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 15 | #include <sys/types.h> |
| 16 | #include <sys/ioctl.h> |
Luiz Capitulino | 2c02cbf | 2012-05-23 15:48:05 -0300 | [diff] [blame] | 17 | #include <sys/wait.h> |
Laszlo Ersek | d2baff6 | 2013-03-06 22:59:30 +0100 | [diff] [blame] | 18 | #include <unistd.h> |
| 19 | #include <errno.h> |
| 20 | #include <fcntl.h> |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/stat.h> |
Laszlo Ersek | d2baff6 | 2013-03-06 22:59:30 +0100 | [diff] [blame] | 24 | #include <inttypes.h> |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 25 | #include "qga/guest-agent-core.h" |
| 26 | #include "qga-qmp-commands.h" |
Paolo Bonzini | 7b1b5d1 | 2012-12-17 18:19:43 +0100 | [diff] [blame] | 27 | #include "qapi/qmp/qerror.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 28 | #include "qemu/queue.h" |
| 29 | #include "qemu/host-utils.h" |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 30 | |
Luiz Capitulino | 2c02cbf | 2012-05-23 15:48:05 -0300 | [diff] [blame] | 31 | #ifndef CONFIG_HAS_ENVIRON |
Andreas Färber | eecae14 | 2012-05-27 17:02:20 +0200 | [diff] [blame] | 32 | #ifdef __APPLE__ |
| 33 | #include <crt_externs.h> |
| 34 | #define environ (*_NSGetEnviron()) |
| 35 | #else |
Luiz Capitulino | 2c02cbf | 2012-05-23 15:48:05 -0300 | [diff] [blame] | 36 | extern char **environ; |
| 37 | #endif |
Andreas Färber | eecae14 | 2012-05-27 17:02:20 +0200 | [diff] [blame] | 38 | #endif |
Luiz Capitulino | 2c02cbf | 2012-05-23 15:48:05 -0300 | [diff] [blame] | 39 | |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 40 | #if defined(__linux__) |
| 41 | #include <mntent.h> |
| 42 | #include <linux/fs.h> |
| 43 | #include <ifaddrs.h> |
| 44 | #include <arpa/inet.h> |
| 45 | #include <sys/socket.h> |
| 46 | #include <net/if.h> |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 47 | |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 48 | #ifdef FIFREEZE |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 49 | #define CONFIG_FSFREEZE |
| 50 | #endif |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 51 | #ifdef FITRIM |
| 52 | #define CONFIG_FSTRIM |
| 53 | #endif |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 54 | #endif |
| 55 | |
Luiz Capitulino | d220a6d | 2012-11-27 11:01:58 -0200 | [diff] [blame] | 56 | static void ga_wait_child(pid_t pid, int *status, Error **err) |
| 57 | { |
| 58 | pid_t rpid; |
| 59 | |
| 60 | *status = 0; |
| 61 | |
| 62 | do { |
| 63 | rpid = waitpid(pid, status, 0); |
| 64 | } while (rpid == -1 && errno == EINTR); |
| 65 | |
| 66 | if (rpid == -1) { |
| 67 | error_setg_errno(err, errno, "failed to wait for child (pid: %d)", pid); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | g_assert(rpid == pid); |
| 72 | } |
| 73 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 74 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) |
| 75 | { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 76 | const char *shutdown_flag; |
Luiz Capitulino | d220a6d | 2012-11-27 11:01:58 -0200 | [diff] [blame] | 77 | Error *local_err = NULL; |
| 78 | pid_t pid; |
Luiz Capitulino | 3674838 | 2012-05-14 15:25:20 -0300 | [diff] [blame] | 79 | int status; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 80 | |
| 81 | slog("guest-shutdown called, mode: %s", mode); |
| 82 | if (!has_mode || strcmp(mode, "powerdown") == 0) { |
| 83 | shutdown_flag = "-P"; |
| 84 | } else if (strcmp(mode, "halt") == 0) { |
| 85 | shutdown_flag = "-H"; |
| 86 | } else if (strcmp(mode, "reboot") == 0) { |
| 87 | shutdown_flag = "-r"; |
| 88 | } else { |
Luiz Capitulino | d220a6d | 2012-11-27 11:01:58 -0200 | [diff] [blame] | 89 | error_setg(err, |
| 90 | "mode is invalid (valid values are: halt|powerdown|reboot"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | |
Luiz Capitulino | d5dd349 | 2012-05-11 16:19:47 -0300 | [diff] [blame] | 94 | pid = fork(); |
| 95 | if (pid == 0) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 96 | /* child, start the shutdown */ |
| 97 | setsid(); |
Luiz Capitulino | 3674838 | 2012-05-14 15:25:20 -0300 | [diff] [blame] | 98 | reopen_fd_to_null(0); |
| 99 | reopen_fd_to_null(1); |
| 100 | reopen_fd_to_null(2); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 101 | |
Luiz Capitulino | 3674838 | 2012-05-14 15:25:20 -0300 | [diff] [blame] | 102 | execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0", |
| 103 | "hypervisor initiated shutdown", (char*)NULL, environ); |
| 104 | _exit(EXIT_FAILURE); |
Luiz Capitulino | d5dd349 | 2012-05-11 16:19:47 -0300 | [diff] [blame] | 105 | } else if (pid < 0) { |
Luiz Capitulino | d220a6d | 2012-11-27 11:01:58 -0200 | [diff] [blame] | 106 | error_setg_errno(err, errno, "failed to create child process"); |
Luiz Capitulino | d5dd349 | 2012-05-11 16:19:47 -0300 | [diff] [blame] | 107 | return; |
| 108 | } |
| 109 | |
Luiz Capitulino | d220a6d | 2012-11-27 11:01:58 -0200 | [diff] [blame] | 110 | ga_wait_child(pid, &status, &local_err); |
| 111 | if (error_is_set(&local_err)) { |
| 112 | error_propagate(err, local_err); |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | if (!WIFEXITED(status)) { |
| 117 | error_setg(err, "child process has terminated abnormally"); |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | if (WEXITSTATUS(status)) { |
| 122 | error_setg(err, "child process has failed to shutdown"); |
| 123 | return; |
| 124 | } |
| 125 | |
Peter Maydell | 085d813 | 2013-03-18 17:20:07 +0000 | [diff] [blame] | 126 | /* succeeded */ |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 127 | } |
| 128 | |
Lei Li | 6912e6a | 2013-03-05 17:39:11 +0800 | [diff] [blame] | 129 | int64_t qmp_guest_get_time(Error **errp) |
| 130 | { |
| 131 | int ret; |
| 132 | qemu_timeval tq; |
| 133 | int64_t time_ns; |
| 134 | |
| 135 | ret = qemu_gettimeofday(&tq); |
| 136 | if (ret < 0) { |
| 137 | error_setg_errno(errp, errno, "Failed to get time"); |
| 138 | return -1; |
| 139 | } |
| 140 | |
| 141 | time_ns = tq.tv_sec * 1000000000LL + tq.tv_usec * 1000; |
| 142 | return time_ns; |
| 143 | } |
| 144 | |
Lei Li | a1bca57 | 2013-03-05 17:39:12 +0800 | [diff] [blame] | 145 | void qmp_guest_set_time(int64_t time_ns, Error **errp) |
| 146 | { |
| 147 | int ret; |
| 148 | int status; |
| 149 | pid_t pid; |
| 150 | Error *local_err = NULL; |
| 151 | struct timeval tv; |
| 152 | |
| 153 | /* year-2038 will overflow in case time_t is 32bit */ |
| 154 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { |
| 155 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | tv.tv_sec = time_ns / 1000000000; |
| 160 | tv.tv_usec = (time_ns % 1000000000) / 1000; |
| 161 | |
| 162 | ret = settimeofday(&tv, NULL); |
| 163 | if (ret < 0) { |
| 164 | error_setg_errno(errp, errno, "Failed to set time to guest"); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | /* Set the Hardware Clock to the current System Time. */ |
| 169 | pid = fork(); |
| 170 | if (pid == 0) { |
| 171 | setsid(); |
| 172 | reopen_fd_to_null(0); |
| 173 | reopen_fd_to_null(1); |
| 174 | reopen_fd_to_null(2); |
| 175 | |
| 176 | execle("/sbin/hwclock", "hwclock", "-w", NULL, environ); |
| 177 | _exit(EXIT_FAILURE); |
| 178 | } else if (pid < 0) { |
| 179 | error_setg_errno(errp, errno, "failed to create child process"); |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | ga_wait_child(pid, &status, &local_err); |
| 184 | if (error_is_set(&local_err)) { |
| 185 | error_propagate(errp, local_err); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | if (!WIFEXITED(status)) { |
| 190 | error_setg(errp, "child process has terminated abnormally"); |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | if (WEXITSTATUS(status)) { |
| 195 | error_setg(errp, "hwclock failed to set hardware clock to system time"); |
| 196 | return; |
| 197 | } |
| 198 | } |
| 199 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 200 | typedef struct GuestFileHandle { |
| 201 | uint64_t id; |
| 202 | FILE *fh; |
| 203 | QTAILQ_ENTRY(GuestFileHandle) next; |
| 204 | } GuestFileHandle; |
| 205 | |
| 206 | static struct { |
| 207 | QTAILQ_HEAD(, GuestFileHandle) filehandles; |
| 208 | } guest_file_state; |
| 209 | |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 210 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 211 | { |
| 212 | GuestFileHandle *gfh; |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 213 | int64_t handle; |
| 214 | |
| 215 | handle = ga_get_fd_handle(ga_state, errp); |
| 216 | if (error_is_set(errp)) { |
| 217 | return 0; |
| 218 | } |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 219 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 220 | gfh = g_malloc0(sizeof(GuestFileHandle)); |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 221 | gfh->id = handle; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 222 | gfh->fh = fh; |
| 223 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 224 | |
| 225 | return handle; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 226 | } |
| 227 | |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 228 | static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err) |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 229 | { |
| 230 | GuestFileHandle *gfh; |
| 231 | |
| 232 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) |
| 233 | { |
| 234 | if (gfh->id == id) { |
| 235 | return gfh; |
| 236 | } |
| 237 | } |
| 238 | |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 239 | error_setg(err, "handle '%" PRId64 "' has not been found", id); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 240 | return NULL; |
| 241 | } |
| 242 | |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 243 | typedef const char * const ccpc; |
| 244 | |
Laszlo Ersek | 8fe6bbc | 2013-05-08 17:31:35 +0200 | [diff] [blame^] | 245 | #ifndef O_BINARY |
| 246 | #define O_BINARY 0 |
| 247 | #endif |
| 248 | |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 249 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ |
| 250 | static const struct { |
| 251 | ccpc *forms; |
| 252 | int oflag_base; |
| 253 | } guest_file_open_modes[] = { |
Laszlo Ersek | 8fe6bbc | 2013-05-08 17:31:35 +0200 | [diff] [blame^] | 254 | { (ccpc[]){ "r", NULL }, O_RDONLY }, |
| 255 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, |
| 256 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, |
| 257 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, |
| 258 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, |
| 259 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, |
| 260 | { (ccpc[]){ "r+", NULL }, O_RDWR }, |
| 261 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, |
| 262 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, |
| 263 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, |
| 264 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, |
| 265 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 266 | }; |
| 267 | |
| 268 | static int |
| 269 | find_open_flag(const char *mode_str, Error **err) |
| 270 | { |
| 271 | unsigned mode; |
| 272 | |
| 273 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { |
| 274 | ccpc *form; |
| 275 | |
| 276 | form = guest_file_open_modes[mode].forms; |
| 277 | while (*form != NULL && strcmp(*form, mode_str) != 0) { |
| 278 | ++form; |
| 279 | } |
| 280 | if (*form != NULL) { |
| 281 | break; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { |
| 286 | error_setg(err, "invalid file open mode '%s'", mode_str); |
| 287 | return -1; |
| 288 | } |
| 289 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; |
| 290 | } |
| 291 | |
| 292 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ |
| 293 | S_IRGRP | S_IWGRP | \ |
| 294 | S_IROTH | S_IWOTH) |
| 295 | |
| 296 | static FILE * |
| 297 | safe_open_or_create(const char *path, const char *mode, Error **err) |
| 298 | { |
| 299 | Error *local_err = NULL; |
| 300 | int oflag; |
| 301 | |
| 302 | oflag = find_open_flag(mode, &local_err); |
| 303 | if (local_err == NULL) { |
| 304 | int fd; |
| 305 | |
| 306 | /* If the caller wants / allows creation of a new file, we implement it |
| 307 | * with a two step process: open() + (open() / fchmod()). |
| 308 | * |
| 309 | * First we insist on creating the file exclusively as a new file. If |
| 310 | * that succeeds, we're free to set any file-mode bits on it. (The |
| 311 | * motivation is that we want to set those file-mode bits independently |
| 312 | * of the current umask.) |
| 313 | * |
| 314 | * If the exclusive creation fails because the file already exists |
| 315 | * (EEXIST is not possible for any other reason), we just attempt to |
| 316 | * open the file, but in this case we won't be allowed to change the |
| 317 | * file-mode bits on the preexistent file. |
| 318 | * |
| 319 | * The pathname should never disappear between the two open()s in |
| 320 | * practice. If it happens, then someone very likely tried to race us. |
| 321 | * In this case just go ahead and report the ENOENT from the second |
| 322 | * open() to the caller. |
| 323 | * |
| 324 | * If the caller wants to open a preexistent file, then the first |
| 325 | * open() is decisive and its third argument is ignored, and the second |
| 326 | * open() and the fchmod() are never called. |
| 327 | */ |
| 328 | fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); |
| 329 | if (fd == -1 && errno == EEXIST) { |
| 330 | oflag &= ~(unsigned)O_CREAT; |
| 331 | fd = open(path, oflag); |
| 332 | } |
| 333 | |
| 334 | if (fd == -1) { |
| 335 | error_setg_errno(&local_err, errno, "failed to open file '%s' " |
| 336 | "(mode: '%s')", path, mode); |
| 337 | } else { |
| 338 | qemu_set_cloexec(fd); |
| 339 | |
| 340 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { |
| 341 | error_setg_errno(&local_err, errno, "failed to set permission " |
| 342 | "0%03o on new file '%s' (mode: '%s')", |
| 343 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); |
| 344 | } else { |
| 345 | FILE *f; |
| 346 | |
| 347 | f = fdopen(fd, mode); |
| 348 | if (f == NULL) { |
| 349 | error_setg_errno(&local_err, errno, "failed to associate " |
| 350 | "stdio stream with file descriptor %d, " |
| 351 | "file '%s' (mode: '%s')", fd, path, mode); |
| 352 | } else { |
| 353 | return f; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | close(fd); |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | error_propagate(err, local_err); |
| 362 | return NULL; |
| 363 | } |
| 364 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 365 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) |
| 366 | { |
| 367 | FILE *fh; |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 368 | Error *local_err = NULL; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 369 | int fd; |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 370 | int64_t ret = -1, handle; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 371 | |
| 372 | if (!has_mode) { |
| 373 | mode = "r"; |
| 374 | } |
| 375 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); |
Laszlo Ersek | c689b4f | 2013-04-24 13:13:18 +0200 | [diff] [blame] | 376 | fh = safe_open_or_create(path, mode, &local_err); |
| 377 | if (local_err != NULL) { |
| 378 | error_propagate(err, local_err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 379 | return -1; |
| 380 | } |
| 381 | |
| 382 | /* set fd non-blocking to avoid common use cases (like reading from a |
| 383 | * named pipe) from hanging the agent |
| 384 | */ |
| 385 | fd = fileno(fh); |
| 386 | ret = fcntl(fd, F_GETFL); |
| 387 | ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); |
| 388 | if (ret == -1) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 389 | error_setg_errno(err, errno, "failed to make file '%s' non-blocking", |
| 390 | path); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 391 | fclose(fh); |
| 392 | return -1; |
| 393 | } |
| 394 | |
Michael Roth | 39097da | 2013-03-01 11:40:27 -0600 | [diff] [blame] | 395 | handle = guest_file_handle_add(fh, err); |
| 396 | if (error_is_set(err)) { |
| 397 | fclose(fh); |
| 398 | return -1; |
| 399 | } |
| 400 | |
| 401 | slog("guest-file-open, handle: %d", handle); |
| 402 | return handle; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | void qmp_guest_file_close(int64_t handle, Error **err) |
| 406 | { |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 407 | GuestFileHandle *gfh = guest_file_handle_find(handle, err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 408 | int ret; |
| 409 | |
| 410 | slog("guest-file-close called, handle: %ld", handle); |
| 411 | if (!gfh) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 412 | return; |
| 413 | } |
| 414 | |
| 415 | ret = fclose(gfh->fh); |
Luiz Capitulino | 3ac4b7c | 2012-11-27 11:01:56 -0200 | [diff] [blame] | 416 | if (ret == EOF) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 417 | error_setg_errno(err, errno, "failed to close handle"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 418 | return; |
| 419 | } |
| 420 | |
| 421 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 422 | g_free(gfh); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count, |
| 426 | int64_t count, Error **err) |
| 427 | { |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 428 | GuestFileHandle *gfh = guest_file_handle_find(handle, err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 429 | GuestFileRead *read_data = NULL; |
| 430 | guchar *buf; |
| 431 | FILE *fh; |
| 432 | size_t read_count; |
| 433 | |
| 434 | if (!gfh) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 435 | return NULL; |
| 436 | } |
| 437 | |
| 438 | if (!has_count) { |
| 439 | count = QGA_READ_COUNT_DEFAULT; |
| 440 | } else if (count < 0) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 441 | error_setg(err, "value '%" PRId64 "' is invalid for argument count", |
| 442 | count); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 443 | return NULL; |
| 444 | } |
| 445 | |
| 446 | fh = gfh->fh; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 447 | buf = g_malloc0(count+1); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 448 | read_count = fread(buf, 1, count, fh); |
| 449 | if (ferror(fh)) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 450 | error_setg_errno(err, errno, "failed to read file"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 451 | slog("guest-file-read failed, handle: %ld", handle); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 452 | } else { |
| 453 | buf[read_count] = 0; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 454 | read_data = g_malloc0(sizeof(GuestFileRead)); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 455 | read_data->count = read_count; |
| 456 | read_data->eof = feof(fh); |
| 457 | if (read_count) { |
| 458 | read_data->buf_b64 = g_base64_encode(buf, read_count); |
| 459 | } |
| 460 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 461 | g_free(buf); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 462 | clearerr(fh); |
| 463 | |
| 464 | return read_data; |
| 465 | } |
| 466 | |
| 467 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, |
| 468 | bool has_count, int64_t count, Error **err) |
| 469 | { |
| 470 | GuestFileWrite *write_data = NULL; |
| 471 | guchar *buf; |
| 472 | gsize buf_len; |
| 473 | int write_count; |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 474 | GuestFileHandle *gfh = guest_file_handle_find(handle, err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 475 | FILE *fh; |
| 476 | |
| 477 | if (!gfh) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 478 | return NULL; |
| 479 | } |
| 480 | |
| 481 | fh = gfh->fh; |
| 482 | buf = g_base64_decode(buf_b64, &buf_len); |
| 483 | |
| 484 | if (!has_count) { |
| 485 | count = buf_len; |
| 486 | } else if (count < 0 || count > buf_len) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 487 | error_setg(err, "value '%" PRId64 "' is invalid for argument count", |
| 488 | count); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 489 | g_free(buf); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 490 | return NULL; |
| 491 | } |
| 492 | |
| 493 | write_count = fwrite(buf, 1, count, fh); |
| 494 | if (ferror(fh)) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 495 | error_setg_errno(err, errno, "failed to write to file"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 496 | slog("guest-file-write failed, handle: %ld", handle); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 497 | } else { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 498 | write_data = g_malloc0(sizeof(GuestFileWrite)); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 499 | write_data->count = write_count; |
| 500 | write_data->eof = feof(fh); |
| 501 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 502 | g_free(buf); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 503 | clearerr(fh); |
| 504 | |
| 505 | return write_data; |
| 506 | } |
| 507 | |
| 508 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, |
| 509 | int64_t whence, Error **err) |
| 510 | { |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 511 | GuestFileHandle *gfh = guest_file_handle_find(handle, err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 512 | GuestFileSeek *seek_data = NULL; |
| 513 | FILE *fh; |
| 514 | int ret; |
| 515 | |
| 516 | if (!gfh) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 517 | return NULL; |
| 518 | } |
| 519 | |
| 520 | fh = gfh->fh; |
| 521 | ret = fseek(fh, offset, whence); |
| 522 | if (ret == -1) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 523 | error_setg_errno(err, errno, "failed to seek file"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 524 | } else { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 525 | seek_data = g_malloc0(sizeof(GuestFileRead)); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 526 | seek_data->position = ftell(fh); |
| 527 | seek_data->eof = feof(fh); |
| 528 | } |
| 529 | clearerr(fh); |
| 530 | |
| 531 | return seek_data; |
| 532 | } |
| 533 | |
| 534 | void qmp_guest_file_flush(int64_t handle, Error **err) |
| 535 | { |
Luiz Capitulino | a9de6d0 | 2012-11-27 11:01:55 -0200 | [diff] [blame] | 536 | GuestFileHandle *gfh = guest_file_handle_find(handle, err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 537 | FILE *fh; |
| 538 | int ret; |
| 539 | |
| 540 | if (!gfh) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 541 | return; |
| 542 | } |
| 543 | |
| 544 | fh = gfh->fh; |
| 545 | ret = fflush(fh); |
| 546 | if (ret == EOF) { |
Luiz Capitulino | db3edb6 | 2012-11-27 11:01:57 -0200 | [diff] [blame] | 547 | error_setg_errno(err, errno, "failed to flush file"); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 548 | } |
| 549 | } |
| 550 | |
| 551 | static void guest_file_init(void) |
| 552 | { |
| 553 | QTAILQ_INIT(&guest_file_state.filehandles); |
| 554 | } |
| 555 | |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 556 | /* linux-specific implementations. avoid this if at all possible. */ |
| 557 | #if defined(__linux__) |
| 558 | |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 559 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 560 | typedef struct FsMount { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 561 | char *dirname; |
| 562 | char *devtype; |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 563 | QTAILQ_ENTRY(FsMount) next; |
| 564 | } FsMount; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 565 | |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 566 | typedef QTAILQ_HEAD(, FsMount) FsMountList; |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 567 | |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 568 | static void free_fs_mount_list(FsMountList *mounts) |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 569 | { |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 570 | FsMount *mount, *temp; |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 571 | |
| 572 | if (!mounts) { |
| 573 | return; |
| 574 | } |
| 575 | |
| 576 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { |
| 577 | QTAILQ_REMOVE(mounts, mount, next); |
| 578 | g_free(mount->dirname); |
| 579 | g_free(mount->devtype); |
| 580 | g_free(mount); |
| 581 | } |
| 582 | } |
| 583 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 584 | /* |
| 585 | * Walk the mount table and build a list of local file systems |
| 586 | */ |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 587 | static void build_fs_mount_list(FsMountList *mounts, Error **err) |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 588 | { |
| 589 | struct mntent *ment; |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 590 | FsMount *mount; |
Michael Roth | 9e2fa41 | 2012-05-29 10:08:50 -0500 | [diff] [blame] | 591 | char const *mtab = "/proc/self/mounts"; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 592 | FILE *fp; |
| 593 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 594 | fp = setmntent(mtab, "r"); |
| 595 | if (!fp) { |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 596 | error_setg(err, "failed to open mtab file: '%s'", mtab); |
| 597 | return; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | while ((ment = getmntent(fp))) { |
| 601 | /* |
| 602 | * An entry which device name doesn't start with a '/' is |
| 603 | * either a dummy file system or a network file system. |
| 604 | * Add special handling for smbfs and cifs as is done by |
| 605 | * coreutils as well. |
| 606 | */ |
| 607 | if ((ment->mnt_fsname[0] != '/') || |
| 608 | (strcmp(ment->mnt_type, "smbfs") == 0) || |
| 609 | (strcmp(ment->mnt_type, "cifs") == 0)) { |
| 610 | continue; |
| 611 | } |
| 612 | |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 613 | mount = g_malloc0(sizeof(FsMount)); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 614 | mount->dirname = g_strdup(ment->mnt_dir); |
| 615 | mount->devtype = g_strdup(ment->mnt_type); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 616 | |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 617 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | endmntent(fp); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 621 | } |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 622 | #endif |
| 623 | |
| 624 | #if defined(CONFIG_FSFREEZE) |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 625 | |
Tomoki Sekiyama | ec0f694 | 2012-12-12 12:55:55 +0900 | [diff] [blame] | 626 | typedef enum { |
| 627 | FSFREEZE_HOOK_THAW = 0, |
| 628 | FSFREEZE_HOOK_FREEZE, |
| 629 | } FsfreezeHookArg; |
| 630 | |
| 631 | const char *fsfreeze_hook_arg_string[] = { |
| 632 | "thaw", |
| 633 | "freeze", |
| 634 | }; |
| 635 | |
| 636 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **err) |
| 637 | { |
| 638 | int status; |
| 639 | pid_t pid; |
| 640 | const char *hook; |
| 641 | const char *arg_str = fsfreeze_hook_arg_string[arg]; |
| 642 | Error *local_err = NULL; |
| 643 | |
| 644 | hook = ga_fsfreeze_hook(ga_state); |
| 645 | if (!hook) { |
| 646 | return; |
| 647 | } |
| 648 | if (access(hook, X_OK) != 0) { |
| 649 | error_setg_errno(err, errno, "can't access fsfreeze hook '%s'", hook); |
| 650 | return; |
| 651 | } |
| 652 | |
| 653 | slog("executing fsfreeze hook with arg '%s'", arg_str); |
| 654 | pid = fork(); |
| 655 | if (pid == 0) { |
| 656 | setsid(); |
| 657 | reopen_fd_to_null(0); |
| 658 | reopen_fd_to_null(1); |
| 659 | reopen_fd_to_null(2); |
| 660 | |
| 661 | execle(hook, hook, arg_str, NULL, environ); |
| 662 | _exit(EXIT_FAILURE); |
| 663 | } else if (pid < 0) { |
| 664 | error_setg_errno(err, errno, "failed to create child process"); |
| 665 | return; |
| 666 | } |
| 667 | |
| 668 | ga_wait_child(pid, &status, &local_err); |
| 669 | if (error_is_set(&local_err)) { |
| 670 | error_propagate(err, local_err); |
| 671 | return; |
| 672 | } |
| 673 | |
| 674 | if (!WIFEXITED(status)) { |
| 675 | error_setg(err, "fsfreeze hook has terminated abnormally"); |
| 676 | return; |
| 677 | } |
| 678 | |
| 679 | status = WEXITSTATUS(status); |
| 680 | if (status) { |
| 681 | error_setg(err, "fsfreeze hook has failed with status %d", status); |
| 682 | return; |
| 683 | } |
| 684 | } |
| 685 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 686 | /* |
| 687 | * Return status of freeze/thaw |
| 688 | */ |
| 689 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) |
| 690 | { |
Michael Roth | f22d85e | 2012-04-17 19:01:45 -0500 | [diff] [blame] | 691 | if (ga_is_frozen(ga_state)) { |
| 692 | return GUEST_FSFREEZE_STATUS_FROZEN; |
| 693 | } |
| 694 | |
| 695 | return GUEST_FSFREEZE_STATUS_THAWED; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | /* |
| 699 | * Walk list of mounted file systems in the guest, and freeze the ones which |
| 700 | * are real local file systems. |
| 701 | */ |
| 702 | int64_t qmp_guest_fsfreeze_freeze(Error **err) |
| 703 | { |
| 704 | int ret = 0, i = 0; |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 705 | FsMountList mounts; |
| 706 | struct FsMount *mount; |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 707 | Error *local_err = NULL; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 708 | int fd; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 709 | |
| 710 | slog("guest-fsfreeze called"); |
| 711 | |
Tomoki Sekiyama | ec0f694 | 2012-12-12 12:55:55 +0900 | [diff] [blame] | 712 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); |
| 713 | if (error_is_set(&local_err)) { |
| 714 | error_propagate(err, local_err); |
| 715 | return -1; |
| 716 | } |
| 717 | |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 718 | QTAILQ_INIT(&mounts); |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 719 | build_fs_mount_list(&mounts, &local_err); |
| 720 | if (error_is_set(&local_err)) { |
| 721 | error_propagate(err, local_err); |
| 722 | return -1; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | /* cannot risk guest agent blocking itself on a write in this state */ |
Michael Roth | f22d85e | 2012-04-17 19:01:45 -0500 | [diff] [blame] | 726 | ga_set_frozen(ga_state); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 727 | |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 728 | QTAILQ_FOREACH(mount, &mounts, next) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 729 | fd = qemu_open(mount->dirname, O_RDONLY); |
| 730 | if (fd == -1) { |
Luiz Capitulino | 617fbbc | 2012-11-27 11:02:00 -0200 | [diff] [blame] | 731 | error_setg_errno(err, errno, "failed to open %s", mount->dirname); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 732 | goto error; |
| 733 | } |
| 734 | |
| 735 | /* we try to cull filesytems we know won't work in advance, but other |
| 736 | * filesytems may not implement fsfreeze for less obvious reasons. |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 737 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
| 738 | * the number of frozen filesystems. |
| 739 | * |
| 740 | * any other error means a failure to freeze a filesystem we |
| 741 | * expect to be freezable, so return an error in those cases |
| 742 | * and return system to thawed state. |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 743 | */ |
| 744 | ret = ioctl(fd, FIFREEZE); |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 745 | if (ret == -1) { |
| 746 | if (errno != EOPNOTSUPP) { |
Luiz Capitulino | 617fbbc | 2012-11-27 11:02:00 -0200 | [diff] [blame] | 747 | error_setg_errno(err, errno, "failed to freeze %s", |
| 748 | mount->dirname); |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 749 | close(fd); |
| 750 | goto error; |
| 751 | } |
| 752 | } else { |
| 753 | i++; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 754 | } |
| 755 | close(fd); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 756 | } |
| 757 | |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 758 | free_fs_mount_list(&mounts); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 759 | return i; |
| 760 | |
| 761 | error: |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 762 | free_fs_mount_list(&mounts); |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 763 | qmp_guest_fsfreeze_thaw(NULL); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | /* |
| 768 | * Walk list of frozen file systems in the guest, and thaw them. |
| 769 | */ |
| 770 | int64_t qmp_guest_fsfreeze_thaw(Error **err) |
| 771 | { |
| 772 | int ret; |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 773 | FsMountList mounts; |
| 774 | FsMount *mount; |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 775 | int fd, i = 0, logged; |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 776 | Error *local_err = NULL; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 777 | |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 778 | QTAILQ_INIT(&mounts); |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 779 | build_fs_mount_list(&mounts, &local_err); |
| 780 | if (error_is_set(&local_err)) { |
| 781 | error_propagate(err, local_err); |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | QTAILQ_FOREACH(mount, &mounts, next) { |
| 786 | logged = false; |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 787 | fd = qemu_open(mount->dirname, O_RDONLY); |
| 788 | if (fd == -1) { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 789 | continue; |
| 790 | } |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 791 | /* we have no way of knowing whether a filesystem was actually unfrozen |
| 792 | * as a result of a successful call to FITHAW, only that if an error |
| 793 | * was returned the filesystem was *not* unfrozen by that particular |
| 794 | * call. |
| 795 | * |
Jim Meyering | a31f053 | 2012-05-09 05:12:04 +0000 | [diff] [blame] | 796 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
Michael Roth | 9e8aded43 | 2012-04-16 19:52:17 -0500 | [diff] [blame] | 797 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
| 798 | * in which case either the filesystem is in an unfreezable state, or, |
| 799 | * more likely, it was thawed previously (and remains so afterward). |
| 800 | * |
| 801 | * also, since the most recent successful call is the one that did |
| 802 | * the actual unfreeze, we can use this to provide an accurate count |
| 803 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which |
| 804 | * may * be useful for determining whether a filesystem was unfrozen |
| 805 | * during the freeze/thaw phase by a process other than qemu-ga. |
| 806 | */ |
| 807 | do { |
| 808 | ret = ioctl(fd, FITHAW); |
| 809 | if (ret == 0 && !logged) { |
| 810 | i++; |
| 811 | logged = true; |
| 812 | } |
| 813 | } while (ret == 0); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 814 | close(fd); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 815 | } |
| 816 | |
Michael Roth | f22d85e | 2012-04-17 19:01:45 -0500 | [diff] [blame] | 817 | ga_unset_frozen(ga_state); |
Paolo Bonzini | af02203 | 2012-06-13 07:41:27 +0200 | [diff] [blame] | 818 | free_fs_mount_list(&mounts); |
Tomoki Sekiyama | ec0f694 | 2012-12-12 12:55:55 +0900 | [diff] [blame] | 819 | |
| 820 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, err); |
| 821 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 822 | return i; |
| 823 | } |
| 824 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 825 | static void guest_fsfreeze_cleanup(void) |
| 826 | { |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 827 | Error *err = NULL; |
| 828 | |
Michael Roth | f22d85e | 2012-04-17 19:01:45 -0500 | [diff] [blame] | 829 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
Markus Armbruster | 6f68674 | 2013-01-16 18:15:08 +0100 | [diff] [blame] | 830 | qmp_guest_fsfreeze_thaw(&err); |
| 831 | if (err) { |
| 832 | slog("failed to clean up frozen filesystems: %s", |
| 833 | error_get_pretty(err)); |
| 834 | error_free(err); |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 835 | } |
| 836 | } |
| 837 | } |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 838 | #endif /* CONFIG_FSFREEZE */ |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 839 | |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 840 | #if defined(CONFIG_FSTRIM) |
| 841 | /* |
| 842 | * Walk list of mounted file systems in the guest, and trim them. |
| 843 | */ |
| 844 | void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) |
| 845 | { |
| 846 | int ret = 0; |
| 847 | FsMountList mounts; |
| 848 | struct FsMount *mount; |
| 849 | int fd; |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 850 | Error *local_err = NULL; |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 851 | struct fstrim_range r = { |
| 852 | .start = 0, |
| 853 | .len = -1, |
| 854 | .minlen = has_minimum ? minimum : 0, |
| 855 | }; |
| 856 | |
| 857 | slog("guest-fstrim called"); |
| 858 | |
| 859 | QTAILQ_INIT(&mounts); |
Luiz Capitulino | 261551d | 2012-11-29 15:29:11 -0200 | [diff] [blame] | 860 | build_fs_mount_list(&mounts, &local_err); |
| 861 | if (error_is_set(&local_err)) { |
| 862 | error_propagate(err, local_err); |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 863 | return; |
| 864 | } |
| 865 | |
| 866 | QTAILQ_FOREACH(mount, &mounts, next) { |
| 867 | fd = qemu_open(mount->dirname, O_RDONLY); |
| 868 | if (fd == -1) { |
Luiz Capitulino | 071673b | 2012-11-27 11:02:01 -0200 | [diff] [blame] | 869 | error_setg_errno(err, errno, "failed to open %s", mount->dirname); |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 870 | goto error; |
| 871 | } |
| 872 | |
| 873 | /* We try to cull filesytems we know won't work in advance, but other |
| 874 | * filesytems may not implement fstrim for less obvious reasons. These |
| 875 | * will report EOPNOTSUPP; we simply ignore these errors. Any other |
| 876 | * error means an unexpected error, so return it in those cases. In |
| 877 | * some other cases ENOTTY will be reported (e.g. CD-ROMs). |
| 878 | */ |
| 879 | ret = ioctl(fd, FITRIM, &r); |
| 880 | if (ret == -1) { |
| 881 | if (errno != ENOTTY && errno != EOPNOTSUPP) { |
Luiz Capitulino | 071673b | 2012-11-27 11:02:01 -0200 | [diff] [blame] | 882 | error_setg_errno(err, errno, "failed to trim %s", |
| 883 | mount->dirname); |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 884 | close(fd); |
| 885 | goto error; |
| 886 | } |
| 887 | } |
| 888 | close(fd); |
| 889 | } |
| 890 | |
| 891 | error: |
| 892 | free_fs_mount_list(&mounts); |
| 893 | } |
| 894 | #endif /* CONFIG_FSTRIM */ |
| 895 | |
| 896 | |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 897 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
| 898 | #define SUSPEND_SUPPORTED 0 |
| 899 | #define SUSPEND_NOT_SUPPORTED 1 |
| 900 | |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 901 | static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg, |
| 902 | const char *sysfile_str, Error **err) |
| 903 | { |
Luiz Capitulino | 6b26e83 | 2012-11-27 11:02:03 -0200 | [diff] [blame] | 904 | Error *local_err = NULL; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 905 | char *pmutils_path; |
Luiz Capitulino | 6b26e83 | 2012-11-27 11:02:03 -0200 | [diff] [blame] | 906 | pid_t pid; |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 907 | int status; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 908 | |
| 909 | pmutils_path = g_find_program_in_path(pmutils_bin); |
| 910 | |
| 911 | pid = fork(); |
| 912 | if (!pid) { |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 913 | char buf[32]; /* hopefully big enough */ |
| 914 | ssize_t ret; |
| 915 | int fd; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 916 | |
| 917 | setsid(); |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 918 | reopen_fd_to_null(0); |
| 919 | reopen_fd_to_null(1); |
| 920 | reopen_fd_to_null(2); |
| 921 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 922 | if (pmutils_path) { |
| 923 | execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ); |
| 924 | } |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 925 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 926 | /* |
| 927 | * If we get here either pm-utils is not installed or execle() has |
| 928 | * failed. Let's try the manual method if the caller wants it. |
| 929 | */ |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 930 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 931 | if (!sysfile_str) { |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 932 | _exit(SUSPEND_NOT_SUPPORTED); |
| 933 | } |
| 934 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 935 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); |
| 936 | if (fd < 0) { |
| 937 | _exit(SUSPEND_NOT_SUPPORTED); |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 938 | } |
| 939 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 940 | ret = read(fd, buf, sizeof(buf)-1); |
| 941 | if (ret <= 0) { |
| 942 | _exit(SUSPEND_NOT_SUPPORTED); |
| 943 | } |
| 944 | buf[ret] = '\0'; |
| 945 | |
| 946 | if (strstr(buf, sysfile_str)) { |
| 947 | _exit(SUSPEND_SUPPORTED); |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 948 | } |
| 949 | |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 950 | _exit(SUSPEND_NOT_SUPPORTED); |
Luiz Capitulino | 6b26e83 | 2012-11-27 11:02:03 -0200 | [diff] [blame] | 951 | } else if (pid < 0) { |
| 952 | error_setg_errno(err, errno, "failed to create child process"); |
| 953 | goto out; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 954 | } |
| 955 | |
Luiz Capitulino | 6b26e83 | 2012-11-27 11:02:03 -0200 | [diff] [blame] | 956 | ga_wait_child(pid, &status, &local_err); |
| 957 | if (error_is_set(&local_err)) { |
| 958 | error_propagate(err, local_err); |
| 959 | goto out; |
| 960 | } |
| 961 | |
| 962 | if (!WIFEXITED(status)) { |
| 963 | error_setg(err, "child process has terminated abnormally"); |
| 964 | goto out; |
| 965 | } |
| 966 | |
| 967 | switch (WEXITSTATUS(status)) { |
| 968 | case SUSPEND_SUPPORTED: |
| 969 | goto out; |
| 970 | case SUSPEND_NOT_SUPPORTED: |
| 971 | error_setg(err, |
| 972 | "the requested suspend mode is not supported by the guest"); |
| 973 | goto out; |
| 974 | default: |
| 975 | error_setg(err, |
| 976 | "the helper program '%s' returned an unexpected exit status" |
| 977 | " code (%d)", pmutils_path, WEXITSTATUS(status)); |
| 978 | goto out; |
| 979 | } |
| 980 | |
| 981 | out: |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 982 | g_free(pmutils_path); |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 983 | } |
| 984 | |
| 985 | static void guest_suspend(const char *pmutils_bin, const char *sysfile_str, |
| 986 | Error **err) |
| 987 | { |
Luiz Capitulino | 7b37608 | 2012-11-27 11:02:04 -0200 | [diff] [blame] | 988 | Error *local_err = NULL; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 989 | char *pmutils_path; |
Luiz Capitulino | 7b37608 | 2012-11-27 11:02:04 -0200 | [diff] [blame] | 990 | pid_t pid; |
Luiz Capitulino | dc8764f0 | 2012-05-11 16:19:46 -0300 | [diff] [blame] | 991 | int status; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 992 | |
| 993 | pmutils_path = g_find_program_in_path(pmutils_bin); |
| 994 | |
| 995 | pid = fork(); |
| 996 | if (pid == 0) { |
| 997 | /* child */ |
| 998 | int fd; |
| 999 | |
| 1000 | setsid(); |
| 1001 | reopen_fd_to_null(0); |
| 1002 | reopen_fd_to_null(1); |
| 1003 | reopen_fd_to_null(2); |
| 1004 | |
| 1005 | if (pmutils_path) { |
| 1006 | execle(pmutils_path, pmutils_bin, NULL, environ); |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * If we get here either pm-utils is not installed or execle() has |
| 1011 | * failed. Let's try the manual method if the caller wants it. |
| 1012 | */ |
| 1013 | |
| 1014 | if (!sysfile_str) { |
| 1015 | _exit(EXIT_FAILURE); |
| 1016 | } |
| 1017 | |
| 1018 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); |
| 1019 | if (fd < 0) { |
| 1020 | _exit(EXIT_FAILURE); |
| 1021 | } |
| 1022 | |
| 1023 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { |
| 1024 | _exit(EXIT_FAILURE); |
| 1025 | } |
| 1026 | |
| 1027 | _exit(EXIT_SUCCESS); |
Luiz Capitulino | 7b37608 | 2012-11-27 11:02:04 -0200 | [diff] [blame] | 1028 | } else if (pid < 0) { |
| 1029 | error_setg_errno(err, errno, "failed to create child process"); |
| 1030 | goto out; |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 1031 | } |
| 1032 | |
Luiz Capitulino | 7b37608 | 2012-11-27 11:02:04 -0200 | [diff] [blame] | 1033 | ga_wait_child(pid, &status, &local_err); |
| 1034 | if (error_is_set(&local_err)) { |
| 1035 | error_propagate(err, local_err); |
| 1036 | goto out; |
| 1037 | } |
| 1038 | |
| 1039 | if (!WIFEXITED(status)) { |
| 1040 | error_setg(err, "child process has terminated abnormally"); |
| 1041 | goto out; |
| 1042 | } |
| 1043 | |
| 1044 | if (WEXITSTATUS(status)) { |
| 1045 | error_setg(err, "child process has failed to suspend"); |
| 1046 | goto out; |
| 1047 | } |
| 1048 | |
| 1049 | out: |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 1050 | g_free(pmutils_path); |
Luiz Capitulino | 11d0f12 | 2012-02-28 11:03:03 -0300 | [diff] [blame] | 1051 | } |
| 1052 | |
| 1053 | void qmp_guest_suspend_disk(Error **err) |
| 1054 | { |
| 1055 | bios_supports_mode("pm-is-supported", "--hibernate", "disk", err); |
| 1056 | if (error_is_set(err)) { |
| 1057 | return; |
| 1058 | } |
| 1059 | |
| 1060 | guest_suspend("pm-hibernate", "disk", err); |
| 1061 | } |
| 1062 | |
Luiz Capitulino | fbf4221 | 2012-02-28 11:03:04 -0300 | [diff] [blame] | 1063 | void qmp_guest_suspend_ram(Error **err) |
| 1064 | { |
| 1065 | bios_supports_mode("pm-is-supported", "--suspend", "mem", err); |
| 1066 | if (error_is_set(err)) { |
| 1067 | return; |
| 1068 | } |
| 1069 | |
| 1070 | guest_suspend("pm-suspend", "mem", err); |
| 1071 | } |
| 1072 | |
Luiz Capitulino | 95f4f40 | 2012-02-28 11:03:05 -0300 | [diff] [blame] | 1073 | void qmp_guest_suspend_hybrid(Error **err) |
| 1074 | { |
| 1075 | bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err); |
| 1076 | if (error_is_set(err)) { |
| 1077 | return; |
| 1078 | } |
| 1079 | |
| 1080 | guest_suspend("pm-suspend-hybrid", NULL, err); |
| 1081 | } |
| 1082 | |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1083 | static GuestNetworkInterfaceList * |
| 1084 | guest_find_interface(GuestNetworkInterfaceList *head, |
| 1085 | const char *name) |
| 1086 | { |
| 1087 | for (; head; head = head->next) { |
| 1088 | if (strcmp(head->value->name, name) == 0) { |
| 1089 | break; |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | return head; |
| 1094 | } |
| 1095 | |
| 1096 | /* |
| 1097 | * Build information about guest interfaces |
| 1098 | */ |
| 1099 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
| 1100 | { |
| 1101 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; |
| 1102 | struct ifaddrs *ifap, *ifa; |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1103 | |
| 1104 | if (getifaddrs(&ifap) < 0) { |
Luiz Capitulino | 878a0ae | 2012-11-27 11:02:02 -0200 | [diff] [blame] | 1105 | error_setg_errno(errp, errno, "getifaddrs failed"); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1106 | goto error; |
| 1107 | } |
| 1108 | |
| 1109 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
| 1110 | GuestNetworkInterfaceList *info; |
| 1111 | GuestIpAddressList **address_list = NULL, *address_item = NULL; |
| 1112 | char addr4[INET_ADDRSTRLEN]; |
| 1113 | char addr6[INET6_ADDRSTRLEN]; |
| 1114 | int sock; |
| 1115 | struct ifreq ifr; |
| 1116 | unsigned char *mac_addr; |
| 1117 | void *p; |
| 1118 | |
| 1119 | g_debug("Processing %s interface", ifa->ifa_name); |
| 1120 | |
| 1121 | info = guest_find_interface(head, ifa->ifa_name); |
| 1122 | |
| 1123 | if (!info) { |
| 1124 | info = g_malloc0(sizeof(*info)); |
| 1125 | info->value = g_malloc0(sizeof(*info->value)); |
| 1126 | info->value->name = g_strdup(ifa->ifa_name); |
| 1127 | |
| 1128 | if (!cur_item) { |
| 1129 | head = cur_item = info; |
| 1130 | } else { |
| 1131 | cur_item->next = info; |
| 1132 | cur_item = info; |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | if (!info->value->has_hardware_address && |
| 1137 | ifa->ifa_flags & SIOCGIFHWADDR) { |
| 1138 | /* we haven't obtained HW address yet */ |
| 1139 | sock = socket(PF_INET, SOCK_STREAM, 0); |
| 1140 | if (sock == -1) { |
Luiz Capitulino | 878a0ae | 2012-11-27 11:02:02 -0200 | [diff] [blame] | 1141 | error_setg_errno(errp, errno, "failed to create socket"); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1142 | goto error; |
| 1143 | } |
| 1144 | |
| 1145 | memset(&ifr, 0, sizeof(ifr)); |
Jim Meyering | 1ab516e | 2012-10-04 13:09:58 +0200 | [diff] [blame] | 1146 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1147 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { |
Luiz Capitulino | 878a0ae | 2012-11-27 11:02:02 -0200 | [diff] [blame] | 1148 | error_setg_errno(errp, errno, |
| 1149 | "failed to get MAC address of %s", |
| 1150 | ifa->ifa_name); |
Markus Armbruster | 10a2158 | 2013-01-16 18:15:09 +0100 | [diff] [blame] | 1151 | close(sock); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1152 | goto error; |
| 1153 | } |
| 1154 | |
Markus Armbruster | 10a2158 | 2013-01-16 18:15:09 +0100 | [diff] [blame] | 1155 | close(sock); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1156 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; |
| 1157 | |
Stefan Weil | e4ada48 | 2013-01-16 18:37:23 +0100 | [diff] [blame] | 1158 | info->value->hardware_address = |
| 1159 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", |
| 1160 | (int) mac_addr[0], (int) mac_addr[1], |
| 1161 | (int) mac_addr[2], (int) mac_addr[3], |
| 1162 | (int) mac_addr[4], (int) mac_addr[5]); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1163 | |
| 1164 | info->value->has_hardware_address = true; |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1165 | } |
| 1166 | |
| 1167 | if (ifa->ifa_addr && |
| 1168 | ifa->ifa_addr->sa_family == AF_INET) { |
| 1169 | /* interface with IPv4 address */ |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1170 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; |
| 1171 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { |
Luiz Capitulino | 878a0ae | 2012-11-27 11:02:02 -0200 | [diff] [blame] | 1172 | error_setg_errno(errp, errno, "inet_ntop failed"); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1173 | goto error; |
| 1174 | } |
| 1175 | |
Markus Armbruster | 10a2158 | 2013-01-16 18:15:09 +0100 | [diff] [blame] | 1176 | address_item = g_malloc0(sizeof(*address_item)); |
| 1177 | address_item->value = g_malloc0(sizeof(*address_item->value)); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1178 | address_item->value->ip_address = g_strdup(addr4); |
| 1179 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; |
| 1180 | |
| 1181 | if (ifa->ifa_netmask) { |
| 1182 | /* Count the number of set bits in netmask. |
| 1183 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ |
| 1184 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; |
| 1185 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); |
| 1186 | } |
| 1187 | } else if (ifa->ifa_addr && |
| 1188 | ifa->ifa_addr->sa_family == AF_INET6) { |
| 1189 | /* interface with IPv6 address */ |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1190 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; |
| 1191 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { |
Luiz Capitulino | 878a0ae | 2012-11-27 11:02:02 -0200 | [diff] [blame] | 1192 | error_setg_errno(errp, errno, "inet_ntop failed"); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1193 | goto error; |
| 1194 | } |
| 1195 | |
Markus Armbruster | 10a2158 | 2013-01-16 18:15:09 +0100 | [diff] [blame] | 1196 | address_item = g_malloc0(sizeof(*address_item)); |
| 1197 | address_item->value = g_malloc0(sizeof(*address_item->value)); |
Michal Privoznik | 3424fc9 | 2012-02-29 17:02:23 +0100 | [diff] [blame] | 1198 | address_item->value->ip_address = g_strdup(addr6); |
| 1199 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; |
| 1200 | |
| 1201 | if (ifa->ifa_netmask) { |
| 1202 | /* Count the number of set bits in netmask. |
| 1203 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ |
| 1204 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; |
| 1205 | address_item->value->prefix = |
| 1206 | ctpop32(((uint32_t *) p)[0]) + |
| 1207 | ctpop32(((uint32_t *) p)[1]) + |
| 1208 | ctpop32(((uint32_t *) p)[2]) + |
| 1209 | ctpop32(((uint32_t *) p)[3]); |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | if (!address_item) { |
| 1214 | continue; |
| 1215 | } |
| 1216 | |
| 1217 | address_list = &info->value->ip_addresses; |
| 1218 | |
| 1219 | while (*address_list && (*address_list)->next) { |
| 1220 | address_list = &(*address_list)->next; |
| 1221 | } |
| 1222 | |
| 1223 | if (!*address_list) { |
| 1224 | *address_list = address_item; |
| 1225 | } else { |
| 1226 | (*address_list)->next = address_item; |
| 1227 | } |
| 1228 | |
| 1229 | info->value->has_ip_addresses = true; |
| 1230 | |
| 1231 | |
| 1232 | } |
| 1233 | |
| 1234 | freeifaddrs(ifap); |
| 1235 | return head; |
| 1236 | |
| 1237 | error: |
| 1238 | freeifaddrs(ifap); |
| 1239 | qapi_free_GuestNetworkInterfaceList(head); |
| 1240 | return NULL; |
| 1241 | } |
| 1242 | |
Laszlo Ersek | d2baff6 | 2013-03-06 22:59:30 +0100 | [diff] [blame] | 1243 | #define SYSCONF_EXACT(name, err) sysconf_exact((name), #name, (err)) |
| 1244 | |
| 1245 | static long sysconf_exact(int name, const char *name_str, Error **err) |
| 1246 | { |
| 1247 | long ret; |
| 1248 | |
| 1249 | errno = 0; |
| 1250 | ret = sysconf(name); |
| 1251 | if (ret == -1) { |
| 1252 | if (errno == 0) { |
| 1253 | error_setg(err, "sysconf(%s): value indefinite", name_str); |
| 1254 | } else { |
| 1255 | error_setg_errno(err, errno, "sysconf(%s)", name_str); |
| 1256 | } |
| 1257 | } |
| 1258 | return ret; |
| 1259 | } |
| 1260 | |
| 1261 | /* Transfer online/offline status between @vcpu and the guest system. |
| 1262 | * |
| 1263 | * On input either @errp or *@errp must be NULL. |
| 1264 | * |
| 1265 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: |
| 1266 | * - R: vcpu->logical_id |
| 1267 | * - W: vcpu->online |
| 1268 | * - W: vcpu->can_offline |
| 1269 | * |
| 1270 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: |
| 1271 | * - R: vcpu->logical_id |
| 1272 | * - R: vcpu->online |
| 1273 | * |
| 1274 | * Written members remain unmodified on error. |
| 1275 | */ |
| 1276 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, |
| 1277 | Error **errp) |
| 1278 | { |
| 1279 | char *dirpath; |
| 1280 | int dirfd; |
| 1281 | |
| 1282 | dirpath = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", |
| 1283 | vcpu->logical_id); |
| 1284 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
| 1285 | if (dirfd == -1) { |
| 1286 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); |
| 1287 | } else { |
| 1288 | static const char fn[] = "online"; |
| 1289 | int fd; |
| 1290 | int res; |
| 1291 | |
| 1292 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); |
| 1293 | if (fd == -1) { |
| 1294 | if (errno != ENOENT) { |
| 1295 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); |
| 1296 | } else if (sys2vcpu) { |
| 1297 | vcpu->online = true; |
| 1298 | vcpu->can_offline = false; |
| 1299 | } else if (!vcpu->online) { |
| 1300 | error_setg(errp, "logical processor #%" PRId64 " can't be " |
| 1301 | "offlined", vcpu->logical_id); |
| 1302 | } /* otherwise pretend successful re-onlining */ |
| 1303 | } else { |
| 1304 | unsigned char status; |
| 1305 | |
| 1306 | res = pread(fd, &status, 1, 0); |
| 1307 | if (res == -1) { |
| 1308 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); |
| 1309 | } else if (res == 0) { |
| 1310 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, |
| 1311 | fn); |
| 1312 | } else if (sys2vcpu) { |
| 1313 | vcpu->online = (status != '0'); |
| 1314 | vcpu->can_offline = true; |
| 1315 | } else if (vcpu->online != (status != '0')) { |
| 1316 | status = '0' + vcpu->online; |
| 1317 | if (pwrite(fd, &status, 1, 0) == -1) { |
| 1318 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, |
| 1319 | fn); |
| 1320 | } |
| 1321 | } /* otherwise pretend successful re-(on|off)-lining */ |
| 1322 | |
| 1323 | res = close(fd); |
| 1324 | g_assert(res == 0); |
| 1325 | } |
| 1326 | |
| 1327 | res = close(dirfd); |
| 1328 | g_assert(res == 0); |
| 1329 | } |
| 1330 | |
| 1331 | g_free(dirpath); |
| 1332 | } |
| 1333 | |
| 1334 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
| 1335 | { |
| 1336 | int64_t current; |
| 1337 | GuestLogicalProcessorList *head, **link; |
| 1338 | long sc_max; |
| 1339 | Error *local_err = NULL; |
| 1340 | |
| 1341 | current = 0; |
| 1342 | head = NULL; |
| 1343 | link = &head; |
| 1344 | sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); |
| 1345 | |
| 1346 | while (local_err == NULL && current < sc_max) { |
| 1347 | GuestLogicalProcessor *vcpu; |
| 1348 | GuestLogicalProcessorList *entry; |
| 1349 | |
| 1350 | vcpu = g_malloc0(sizeof *vcpu); |
| 1351 | vcpu->logical_id = current++; |
| 1352 | vcpu->has_can_offline = true; /* lolspeak ftw */ |
| 1353 | transfer_vcpu(vcpu, true, &local_err); |
| 1354 | |
| 1355 | entry = g_malloc0(sizeof *entry); |
| 1356 | entry->value = vcpu; |
| 1357 | |
| 1358 | *link = entry; |
| 1359 | link = &entry->next; |
| 1360 | } |
| 1361 | |
| 1362 | if (local_err == NULL) { |
| 1363 | /* there's no guest with zero VCPUs */ |
| 1364 | g_assert(head != NULL); |
| 1365 | return head; |
| 1366 | } |
| 1367 | |
| 1368 | qapi_free_GuestLogicalProcessorList(head); |
| 1369 | error_propagate(errp, local_err); |
| 1370 | return NULL; |
| 1371 | } |
| 1372 | |
Laszlo Ersek | cbb65fc | 2013-03-06 22:59:31 +0100 | [diff] [blame] | 1373 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
| 1374 | { |
| 1375 | int64_t processed; |
| 1376 | Error *local_err = NULL; |
| 1377 | |
| 1378 | processed = 0; |
| 1379 | while (vcpus != NULL) { |
| 1380 | transfer_vcpu(vcpus->value, false, &local_err); |
| 1381 | if (local_err != NULL) { |
| 1382 | break; |
| 1383 | } |
| 1384 | ++processed; |
| 1385 | vcpus = vcpus->next; |
| 1386 | } |
| 1387 | |
| 1388 | if (local_err != NULL) { |
| 1389 | if (processed == 0) { |
| 1390 | error_propagate(errp, local_err); |
| 1391 | } else { |
| 1392 | error_free(local_err); |
| 1393 | } |
| 1394 | } |
| 1395 | |
| 1396 | return processed; |
| 1397 | } |
| 1398 | |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 1399 | #else /* defined(__linux__) */ |
| 1400 | |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 1401 | void qmp_guest_suspend_disk(Error **err) |
| 1402 | { |
| 1403 | error_set(err, QERR_UNSUPPORTED); |
| 1404 | } |
| 1405 | |
| 1406 | void qmp_guest_suspend_ram(Error **err) |
| 1407 | { |
| 1408 | error_set(err, QERR_UNSUPPORTED); |
| 1409 | } |
| 1410 | |
| 1411 | void qmp_guest_suspend_hybrid(Error **err) |
| 1412 | { |
| 1413 | error_set(err, QERR_UNSUPPORTED); |
| 1414 | } |
| 1415 | |
| 1416 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
| 1417 | { |
| 1418 | error_set(errp, QERR_UNSUPPORTED); |
| 1419 | return NULL; |
| 1420 | } |
| 1421 | |
Laszlo Ersek | d2baff6 | 2013-03-06 22:59:30 +0100 | [diff] [blame] | 1422 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
| 1423 | { |
| 1424 | error_set(errp, QERR_UNSUPPORTED); |
| 1425 | return NULL; |
| 1426 | } |
| 1427 | |
Laszlo Ersek | cbb65fc | 2013-03-06 22:59:31 +0100 | [diff] [blame] | 1428 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
| 1429 | { |
| 1430 | error_set(errp, QERR_UNSUPPORTED); |
| 1431 | return -1; |
| 1432 | } |
| 1433 | |
Michael Roth | e72c3f2 | 2012-03-25 13:59:41 -0500 | [diff] [blame] | 1434 | #endif |
| 1435 | |
Michael Roth | d35d4cb | 2012-04-13 21:07:36 -0500 | [diff] [blame] | 1436 | #if !defined(CONFIG_FSFREEZE) |
| 1437 | |
| 1438 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err) |
| 1439 | { |
| 1440 | error_set(err, QERR_UNSUPPORTED); |
| 1441 | |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | int64_t qmp_guest_fsfreeze_freeze(Error **err) |
| 1446 | { |
| 1447 | error_set(err, QERR_UNSUPPORTED); |
| 1448 | |
| 1449 | return 0; |
| 1450 | } |
| 1451 | |
| 1452 | int64_t qmp_guest_fsfreeze_thaw(Error **err) |
| 1453 | { |
| 1454 | error_set(err, QERR_UNSUPPORTED); |
| 1455 | |
| 1456 | return 0; |
| 1457 | } |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 1458 | #endif /* CONFIG_FSFREEZE */ |
Michael Roth | d35d4cb | 2012-04-13 21:07:36 -0500 | [diff] [blame] | 1459 | |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 1460 | #if !defined(CONFIG_FSTRIM) |
| 1461 | void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err) |
| 1462 | { |
| 1463 | error_set(err, QERR_UNSUPPORTED); |
Paolo Bonzini | eab5fd5 | 2012-06-13 07:41:28 +0200 | [diff] [blame] | 1464 | } |
Michael Roth | d35d4cb | 2012-04-13 21:07:36 -0500 | [diff] [blame] | 1465 | #endif |
| 1466 | |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 1467 | /* register init/cleanup routines for stateful command groups */ |
| 1468 | void ga_command_state_init(GAState *s, GACommandState *cs) |
| 1469 | { |
Anthony Liguori | 7006b9c | 2011-07-22 14:14:17 -0500 | [diff] [blame] | 1470 | #if defined(CONFIG_FSFREEZE) |
Michael Roth | f22d85e | 2012-04-17 19:01:45 -0500 | [diff] [blame] | 1471 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
Anthony Liguori | 7006b9c | 2011-07-22 14:14:17 -0500 | [diff] [blame] | 1472 | #endif |
Michael Roth | e3d4d25 | 2011-07-19 15:41:55 -0500 | [diff] [blame] | 1473 | ga_command_state_add(cs, guest_file_init, NULL); |
| 1474 | } |