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Commit | Line | Data |
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e3d4d252 | 1 | /* |
42074a9d | 2 | * QEMU Guest Agent POSIX-specific command implementations |
e3d4d252 MR |
3 | * |
4 | * Copyright IBM Corp. 2011 | |
5 | * | |
6 | * Authors: | |
7 | * Michael Roth <mdroth@linux.vnet.ibm.com> | |
3424fc9f | 8 | * Michal Privoznik <mprivozn@redhat.com> |
e3d4d252 MR |
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 | ||
4459bf38 | 14 | #include "qemu/osdep.h" |
e72c3f2e | 15 | #include <sys/ioctl.h> |
9848f797 | 16 | #include <sys/utsname.h> |
2c02cbf6 | 17 | #include <sys/wait.h> |
46d4c572 | 18 | #include <dirent.h> |
a8d25326 | 19 | #include "qemu-common.h" |
dc03272d | 20 | #include "guest-agent-core.h" |
eb815e24 | 21 | #include "qga-qapi-commands.h" |
e688df6b | 22 | #include "qapi/error.h" |
7b1b5d19 | 23 | #include "qapi/qmp/qerror.h" |
1de7afc9 PB |
24 | #include "qemu/queue.h" |
25 | #include "qemu/host-utils.h" | |
12505396 | 26 | #include "qemu/sockets.h" |
920639ca | 27 | #include "qemu/base64.h" |
f348b6d1 | 28 | #include "qemu/cutils.h" |
5d3586b8 | 29 | #include "commands-common.h" |
4eb36d40 | 30 | |
e674605f TG |
31 | #ifdef HAVE_UTMPX |
32 | #include <utmpx.h> | |
33 | #endif | |
34 | ||
2c02cbf6 | 35 | #ifndef CONFIG_HAS_ENVIRON |
eecae147 AF |
36 | #ifdef __APPLE__ |
37 | #include <crt_externs.h> | |
38 | #define environ (*_NSGetEnviron()) | |
39 | #else | |
2c02cbf6 LC |
40 | extern char **environ; |
41 | #endif | |
eecae147 | 42 | #endif |
2c02cbf6 | 43 | |
4eb36d40 | 44 | #if defined(__linux__) |
e3d4d252 | 45 | #include <mntent.h> |
7006b9cf | 46 | #include <linux/fs.h> |
3424fc9f MP |
47 | #include <ifaddrs.h> |
48 | #include <arpa/inet.h> | |
49 | #include <sys/socket.h> | |
50 | #include <net/if.h> | |
25b5ff1a | 51 | #include <sys/statvfs.h> |
e3d4d252 | 52 | |
b616105a TG |
53 | #ifdef CONFIG_LIBUDEV |
54 | #include <libudev.h> | |
55 | #endif | |
56 | ||
eab5fd59 | 57 | #ifdef FIFREEZE |
e72c3f2e MR |
58 | #define CONFIG_FSFREEZE |
59 | #endif | |
eab5fd59 PB |
60 | #ifdef FITRIM |
61 | #define CONFIG_FSTRIM | |
62 | #endif | |
e72c3f2e MR |
63 | #endif |
64 | ||
77dbc81b | 65 | static void ga_wait_child(pid_t pid, int *status, Error **errp) |
d220a6df LC |
66 | { |
67 | pid_t rpid; | |
68 | ||
69 | *status = 0; | |
70 | ||
71 | do { | |
72 | rpid = waitpid(pid, status, 0); | |
73 | } while (rpid == -1 && errno == EINTR); | |
74 | ||
75 | if (rpid == -1) { | |
77dbc81b MA |
76 | error_setg_errno(errp, errno, "failed to wait for child (pid: %d)", |
77 | pid); | |
d220a6df LC |
78 | return; |
79 | } | |
80 | ||
81 | g_assert(rpid == pid); | |
82 | } | |
83 | ||
77dbc81b | 84 | void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp) |
e3d4d252 | 85 | { |
e3d4d252 | 86 | const char *shutdown_flag; |
d220a6df LC |
87 | Error *local_err = NULL; |
88 | pid_t pid; | |
3674838c | 89 | int status; |
e3d4d252 MR |
90 | |
91 | slog("guest-shutdown called, mode: %s", mode); | |
92 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
93 | shutdown_flag = "-P"; | |
94 | } else if (strcmp(mode, "halt") == 0) { | |
95 | shutdown_flag = "-H"; | |
96 | } else if (strcmp(mode, "reboot") == 0) { | |
97 | shutdown_flag = "-r"; | |
98 | } else { | |
77dbc81b | 99 | error_setg(errp, |
d220a6df | 100 | "mode is invalid (valid values are: halt|powerdown|reboot"); |
e3d4d252 MR |
101 | return; |
102 | } | |
103 | ||
d5dd3498 LC |
104 | pid = fork(); |
105 | if (pid == 0) { | |
e3d4d252 MR |
106 | /* child, start the shutdown */ |
107 | setsid(); | |
3674838c LC |
108 | reopen_fd_to_null(0); |
109 | reopen_fd_to_null(1); | |
110 | reopen_fd_to_null(2); | |
e3d4d252 | 111 | |
485e741c | 112 | execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", |
3674838c LC |
113 | "hypervisor initiated shutdown", (char*)NULL, environ); |
114 | _exit(EXIT_FAILURE); | |
d5dd3498 | 115 | } else if (pid < 0) { |
77dbc81b | 116 | error_setg_errno(errp, errno, "failed to create child process"); |
d220a6df | 117 | return; |
e3d4d252 | 118 | } |
d5dd3498 | 119 | |
d220a6df | 120 | ga_wait_child(pid, &status, &local_err); |
84d18f06 | 121 | if (local_err) { |
77dbc81b | 122 | error_propagate(errp, local_err); |
d220a6df LC |
123 | return; |
124 | } | |
125 | ||
126 | if (!WIFEXITED(status)) { | |
77dbc81b | 127 | error_setg(errp, "child process has terminated abnormally"); |
d220a6df LC |
128 | return; |
129 | } | |
130 | ||
131 | if (WEXITSTATUS(status)) { | |
77dbc81b | 132 | error_setg(errp, "child process has failed to shutdown"); |
d5dd3498 LC |
133 | return; |
134 | } | |
135 | ||
085d8134 | 136 | /* succeeded */ |
e3d4d252 MR |
137 | } |
138 | ||
6912e6a9 LL |
139 | int64_t qmp_guest_get_time(Error **errp) |
140 | { | |
141 | int ret; | |
142 | qemu_timeval tq; | |
6912e6a9 LL |
143 | |
144 | ret = qemu_gettimeofday(&tq); | |
145 | if (ret < 0) { | |
146 | error_setg_errno(errp, errno, "Failed to get time"); | |
147 | return -1; | |
148 | } | |
149 | ||
9be38598 | 150 | return tq.tv_sec * 1000000000LL + tq.tv_usec * 1000; |
6912e6a9 LL |
151 | } |
152 | ||
2c958923 | 153 | void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) |
a1bca57f LL |
154 | { |
155 | int ret; | |
156 | int status; | |
157 | pid_t pid; | |
158 | Error *local_err = NULL; | |
159 | struct timeval tv; | |
5c6096e5 CH |
160 | static const char hwclock_path[] = "/sbin/hwclock"; |
161 | static int hwclock_available = -1; | |
162 | ||
163 | if (hwclock_available < 0) { | |
164 | hwclock_available = (access(hwclock_path, X_OK) == 0); | |
165 | } | |
166 | ||
167 | if (!hwclock_available) { | |
168 | error_setg(errp, QERR_UNSUPPORTED); | |
169 | return; | |
170 | } | |
a1bca57f | 171 | |
2c958923 MP |
172 | /* If user has passed a time, validate and set it. */ |
173 | if (has_time) { | |
00d2f370 MAL |
174 | GDate date = { 0, }; |
175 | ||
2c958923 MP |
176 | /* year-2038 will overflow in case time_t is 32bit */ |
177 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { | |
178 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); | |
179 | return; | |
180 | } | |
181 | ||
182 | tv.tv_sec = time_ns / 1000000000; | |
183 | tv.tv_usec = (time_ns % 1000000000) / 1000; | |
00d2f370 MAL |
184 | g_date_set_time_t(&date, tv.tv_sec); |
185 | if (date.year < 1970 || date.year >= 2070) { | |
186 | error_setg_errno(errp, errno, "Invalid time"); | |
187 | return; | |
188 | } | |
2c958923 MP |
189 | |
190 | ret = settimeofday(&tv, NULL); | |
191 | if (ret < 0) { | |
192 | error_setg_errno(errp, errno, "Failed to set time to guest"); | |
193 | return; | |
194 | } | |
a1bca57f LL |
195 | } |
196 | ||
2c958923 MP |
197 | /* Now, if user has passed a time to set and the system time is set, we |
198 | * just need to synchronize the hardware clock. However, if no time was | |
199 | * passed, user is requesting the opposite: set the system time from the | |
1634df56 | 200 | * hardware clock (RTC). */ |
a1bca57f LL |
201 | pid = fork(); |
202 | if (pid == 0) { | |
203 | setsid(); | |
204 | reopen_fd_to_null(0); | |
205 | reopen_fd_to_null(1); | |
206 | reopen_fd_to_null(2); | |
207 | ||
2c958923 MP |
208 | /* Use '/sbin/hwclock -w' to set RTC from the system time, |
209 | * or '/sbin/hwclock -s' to set the system time from RTC. */ | |
5c6096e5 | 210 | execle(hwclock_path, "hwclock", has_time ? "-w" : "-s", |
2c958923 | 211 | NULL, environ); |
a1bca57f LL |
212 | _exit(EXIT_FAILURE); |
213 | } else if (pid < 0) { | |
214 | error_setg_errno(errp, errno, "failed to create child process"); | |
215 | return; | |
216 | } | |
217 | ||
218 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 219 | if (local_err) { |
a1bca57f LL |
220 | error_propagate(errp, local_err); |
221 | return; | |
222 | } | |
223 | ||
224 | if (!WIFEXITED(status)) { | |
225 | error_setg(errp, "child process has terminated abnormally"); | |
226 | return; | |
227 | } | |
228 | ||
229 | if (WEXITSTATUS(status)) { | |
230 | error_setg(errp, "hwclock failed to set hardware clock to system time"); | |
231 | return; | |
232 | } | |
233 | } | |
234 | ||
895b00f6 MAL |
235 | typedef enum { |
236 | RW_STATE_NEW, | |
237 | RW_STATE_READING, | |
238 | RW_STATE_WRITING, | |
239 | } RwState; | |
240 | ||
5d3586b8 | 241 | struct GuestFileHandle { |
e3d4d252 MR |
242 | uint64_t id; |
243 | FILE *fh; | |
895b00f6 | 244 | RwState state; |
e3d4d252 | 245 | QTAILQ_ENTRY(GuestFileHandle) next; |
5d3586b8 | 246 | }; |
e3d4d252 MR |
247 | |
248 | static struct { | |
249 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
b4fe97c8 DL |
250 | } guest_file_state = { |
251 | .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), | |
252 | }; | |
e3d4d252 | 253 | |
39097daf | 254 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) |
e3d4d252 MR |
255 | { |
256 | GuestFileHandle *gfh; | |
39097daf MR |
257 | int64_t handle; |
258 | ||
259 | handle = ga_get_fd_handle(ga_state, errp); | |
a903f40c MA |
260 | if (handle < 0) { |
261 | return -1; | |
39097daf | 262 | } |
e3d4d252 | 263 | |
f3a06403 | 264 | gfh = g_new0(GuestFileHandle, 1); |
39097daf | 265 | gfh->id = handle; |
e3d4d252 MR |
266 | gfh->fh = fh; |
267 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
39097daf MR |
268 | |
269 | return handle; | |
e3d4d252 MR |
270 | } |
271 | ||
5d3586b8 | 272 | GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) |
e3d4d252 MR |
273 | { |
274 | GuestFileHandle *gfh; | |
275 | ||
276 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
277 | { | |
278 | if (gfh->id == id) { | |
279 | return gfh; | |
280 | } | |
281 | } | |
282 | ||
77dbc81b | 283 | error_setg(errp, "handle '%" PRId64 "' has not been found", id); |
e3d4d252 MR |
284 | return NULL; |
285 | } | |
286 | ||
c689b4f1 LE |
287 | typedef const char * const ccpc; |
288 | ||
8fe6bbca LE |
289 | #ifndef O_BINARY |
290 | #define O_BINARY 0 | |
291 | #endif | |
292 | ||
c689b4f1 LE |
293 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ |
294 | static const struct { | |
295 | ccpc *forms; | |
296 | int oflag_base; | |
297 | } guest_file_open_modes[] = { | |
8fe6bbca LE |
298 | { (ccpc[]){ "r", NULL }, O_RDONLY }, |
299 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, | |
300 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, | |
301 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, | |
302 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, | |
303 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, | |
304 | { (ccpc[]){ "r+", NULL }, O_RDWR }, | |
305 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, | |
306 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, | |
307 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, | |
308 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, | |
309 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } | |
c689b4f1 LE |
310 | }; |
311 | ||
312 | static int | |
77dbc81b | 313 | find_open_flag(const char *mode_str, Error **errp) |
c689b4f1 LE |
314 | { |
315 | unsigned mode; | |
316 | ||
317 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { | |
318 | ccpc *form; | |
319 | ||
320 | form = guest_file_open_modes[mode].forms; | |
321 | while (*form != NULL && strcmp(*form, mode_str) != 0) { | |
322 | ++form; | |
323 | } | |
324 | if (*form != NULL) { | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { | |
77dbc81b | 330 | error_setg(errp, "invalid file open mode '%s'", mode_str); |
c689b4f1 LE |
331 | return -1; |
332 | } | |
333 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; | |
334 | } | |
335 | ||
336 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ | |
337 | S_IRGRP | S_IWGRP | \ | |
338 | S_IROTH | S_IWOTH) | |
339 | ||
340 | static FILE * | |
77dbc81b | 341 | safe_open_or_create(const char *path, const char *mode, Error **errp) |
c689b4f1 LE |
342 | { |
343 | Error *local_err = NULL; | |
344 | int oflag; | |
345 | ||
346 | oflag = find_open_flag(mode, &local_err); | |
347 | if (local_err == NULL) { | |
348 | int fd; | |
349 | ||
350 | /* If the caller wants / allows creation of a new file, we implement it | |
351 | * with a two step process: open() + (open() / fchmod()). | |
352 | * | |
353 | * First we insist on creating the file exclusively as a new file. If | |
354 | * that succeeds, we're free to set any file-mode bits on it. (The | |
355 | * motivation is that we want to set those file-mode bits independently | |
356 | * of the current umask.) | |
357 | * | |
358 | * If the exclusive creation fails because the file already exists | |
359 | * (EEXIST is not possible for any other reason), we just attempt to | |
360 | * open the file, but in this case we won't be allowed to change the | |
361 | * file-mode bits on the preexistent file. | |
362 | * | |
363 | * The pathname should never disappear between the two open()s in | |
364 | * practice. If it happens, then someone very likely tried to race us. | |
365 | * In this case just go ahead and report the ENOENT from the second | |
366 | * open() to the caller. | |
367 | * | |
368 | * If the caller wants to open a preexistent file, then the first | |
369 | * open() is decisive and its third argument is ignored, and the second | |
370 | * open() and the fchmod() are never called. | |
371 | */ | |
372 | fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); | |
373 | if (fd == -1 && errno == EEXIST) { | |
374 | oflag &= ~(unsigned)O_CREAT; | |
375 | fd = open(path, oflag); | |
376 | } | |
377 | ||
378 | if (fd == -1) { | |
379 | error_setg_errno(&local_err, errno, "failed to open file '%s' " | |
380 | "(mode: '%s')", path, mode); | |
381 | } else { | |
382 | qemu_set_cloexec(fd); | |
383 | ||
384 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { | |
385 | error_setg_errno(&local_err, errno, "failed to set permission " | |
386 | "0%03o on new file '%s' (mode: '%s')", | |
387 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); | |
388 | } else { | |
389 | FILE *f; | |
390 | ||
391 | f = fdopen(fd, mode); | |
392 | if (f == NULL) { | |
393 | error_setg_errno(&local_err, errno, "failed to associate " | |
394 | "stdio stream with file descriptor %d, " | |
395 | "file '%s' (mode: '%s')", fd, path, mode); | |
396 | } else { | |
397 | return f; | |
398 | } | |
399 | } | |
400 | ||
401 | close(fd); | |
2b720018 LE |
402 | if (oflag & O_CREAT) { |
403 | unlink(path); | |
404 | } | |
c689b4f1 LE |
405 | } |
406 | } | |
407 | ||
77dbc81b | 408 | error_propagate(errp, local_err); |
c689b4f1 LE |
409 | return NULL; |
410 | } | |
411 | ||
77dbc81b MA |
412 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, |
413 | Error **errp) | |
e3d4d252 MR |
414 | { |
415 | FILE *fh; | |
c689b4f1 | 416 | Error *local_err = NULL; |
85b6f6f5 | 417 | int64_t handle; |
e3d4d252 MR |
418 | |
419 | if (!has_mode) { | |
420 | mode = "r"; | |
421 | } | |
422 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
c689b4f1 LE |
423 | fh = safe_open_or_create(path, mode, &local_err); |
424 | if (local_err != NULL) { | |
77dbc81b | 425 | error_propagate(errp, local_err); |
e3d4d252 MR |
426 | return -1; |
427 | } | |
428 | ||
429 | /* set fd non-blocking to avoid common use cases (like reading from a | |
430 | * named pipe) from hanging the agent | |
431 | */ | |
12505396 | 432 | qemu_set_nonblock(fileno(fh)); |
e3d4d252 | 433 | |
77dbc81b | 434 | handle = guest_file_handle_add(fh, errp); |
a903f40c | 435 | if (handle < 0) { |
39097daf MR |
436 | fclose(fh); |
437 | return -1; | |
438 | } | |
439 | ||
d607a523 | 440 | slog("guest-file-open, handle: %" PRId64, handle); |
39097daf | 441 | return handle; |
e3d4d252 MR |
442 | } |
443 | ||
77dbc81b | 444 | void qmp_guest_file_close(int64_t handle, Error **errp) |
e3d4d252 | 445 | { |
77dbc81b | 446 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
447 | int ret; |
448 | ||
d607a523 | 449 | slog("guest-file-close called, handle: %" PRId64, handle); |
e3d4d252 | 450 | if (!gfh) { |
e3d4d252 MR |
451 | return; |
452 | } | |
453 | ||
454 | ret = fclose(gfh->fh); | |
3ac4b7c5 | 455 | if (ret == EOF) { |
77dbc81b | 456 | error_setg_errno(errp, errno, "failed to close handle"); |
e3d4d252 MR |
457 | return; |
458 | } | |
459 | ||
460 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 461 | g_free(gfh); |
e3d4d252 MR |
462 | } |
463 | ||
ead83a13 PMD |
464 | GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh, |
465 | int64_t count, Error **errp) | |
e3d4d252 | 466 | { |
e3d4d252 MR |
467 | GuestFileRead *read_data = NULL; |
468 | guchar *buf; | |
ead83a13 | 469 | FILE *fh = gfh->fh; |
e3d4d252 MR |
470 | size_t read_count; |
471 | ||
895b00f6 MAL |
472 | /* explicitly flush when switching from writing to reading */ |
473 | if (gfh->state == RW_STATE_WRITING) { | |
474 | int ret = fflush(fh); | |
475 | if (ret == EOF) { | |
476 | error_setg_errno(errp, errno, "failed to flush file"); | |
477 | return NULL; | |
478 | } | |
479 | gfh->state = RW_STATE_NEW; | |
480 | } | |
481 | ||
7267c094 | 482 | buf = g_malloc0(count+1); |
e3d4d252 MR |
483 | read_count = fread(buf, 1, count, fh); |
484 | if (ferror(fh)) { | |
77dbc81b | 485 | error_setg_errno(errp, errno, "failed to read file"); |
e3d4d252 MR |
486 | } else { |
487 | buf[read_count] = 0; | |
f3a06403 | 488 | read_data = g_new0(GuestFileRead, 1); |
e3d4d252 MR |
489 | read_data->count = read_count; |
490 | read_data->eof = feof(fh); | |
491 | if (read_count) { | |
492 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
493 | } | |
895b00f6 | 494 | gfh->state = RW_STATE_READING; |
e3d4d252 | 495 | } |
7267c094 | 496 | g_free(buf); |
e3d4d252 MR |
497 | clearerr(fh); |
498 | ||
499 | return read_data; | |
500 | } | |
501 | ||
502 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
77dbc81b MA |
503 | bool has_count, int64_t count, |
504 | Error **errp) | |
e3d4d252 MR |
505 | { |
506 | GuestFileWrite *write_data = NULL; | |
507 | guchar *buf; | |
508 | gsize buf_len; | |
509 | int write_count; | |
77dbc81b | 510 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
511 | FILE *fh; |
512 | ||
513 | if (!gfh) { | |
e3d4d252 MR |
514 | return NULL; |
515 | } | |
516 | ||
517 | fh = gfh->fh; | |
895b00f6 MAL |
518 | |
519 | if (gfh->state == RW_STATE_READING) { | |
520 | int ret = fseek(fh, 0, SEEK_CUR); | |
521 | if (ret == -1) { | |
522 | error_setg_errno(errp, errno, "failed to seek file"); | |
523 | return NULL; | |
524 | } | |
525 | gfh->state = RW_STATE_NEW; | |
526 | } | |
527 | ||
920639ca DB |
528 | buf = qbase64_decode(buf_b64, -1, &buf_len, errp); |
529 | if (!buf) { | |
530 | return NULL; | |
531 | } | |
e3d4d252 MR |
532 | |
533 | if (!has_count) { | |
534 | count = buf_len; | |
535 | } else if (count < 0 || count > buf_len) { | |
77dbc81b | 536 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", |
db3edb66 | 537 | count); |
7267c094 | 538 | g_free(buf); |
e3d4d252 MR |
539 | return NULL; |
540 | } | |
541 | ||
542 | write_count = fwrite(buf, 1, count, fh); | |
543 | if (ferror(fh)) { | |
77dbc81b | 544 | error_setg_errno(errp, errno, "failed to write to file"); |
d607a523 | 545 | slog("guest-file-write failed, handle: %" PRId64, handle); |
e3d4d252 | 546 | } else { |
f3a06403 | 547 | write_data = g_new0(GuestFileWrite, 1); |
e3d4d252 MR |
548 | write_data->count = write_count; |
549 | write_data->eof = feof(fh); | |
895b00f6 | 550 | gfh->state = RW_STATE_WRITING; |
e3d4d252 | 551 | } |
7267c094 | 552 | g_free(buf); |
e3d4d252 MR |
553 | clearerr(fh); |
554 | ||
555 | return write_data; | |
556 | } | |
557 | ||
558 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
0b4b4938 EB |
559 | GuestFileWhence *whence_code, |
560 | Error **errp) | |
e3d4d252 | 561 | { |
77dbc81b | 562 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
563 | GuestFileSeek *seek_data = NULL; |
564 | FILE *fh; | |
565 | int ret; | |
0a982b1b | 566 | int whence; |
0b4b4938 | 567 | Error *err = NULL; |
e3d4d252 MR |
568 | |
569 | if (!gfh) { | |
e3d4d252 MR |
570 | return NULL; |
571 | } | |
572 | ||
0a982b1b | 573 | /* We stupidly exposed 'whence':'int' in our qapi */ |
0b4b4938 EB |
574 | whence = ga_parse_whence(whence_code, &err); |
575 | if (err) { | |
576 | error_propagate(errp, err); | |
0a982b1b EB |
577 | return NULL; |
578 | } | |
579 | ||
e3d4d252 MR |
580 | fh = gfh->fh; |
581 | ret = fseek(fh, offset, whence); | |
582 | if (ret == -1) { | |
77dbc81b | 583 | error_setg_errno(errp, errno, "failed to seek file"); |
895b00f6 MAL |
584 | if (errno == ESPIPE) { |
585 | /* file is non-seekable, stdio shouldn't be buffering anyways */ | |
586 | gfh->state = RW_STATE_NEW; | |
587 | } | |
e3d4d252 | 588 | } else { |
10b7c5dd | 589 | seek_data = g_new0(GuestFileSeek, 1); |
e3d4d252 MR |
590 | seek_data->position = ftell(fh); |
591 | seek_data->eof = feof(fh); | |
895b00f6 | 592 | gfh->state = RW_STATE_NEW; |
e3d4d252 MR |
593 | } |
594 | clearerr(fh); | |
595 | ||
596 | return seek_data; | |
597 | } | |
598 | ||
77dbc81b | 599 | void qmp_guest_file_flush(int64_t handle, Error **errp) |
e3d4d252 | 600 | { |
77dbc81b | 601 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
602 | FILE *fh; |
603 | int ret; | |
604 | ||
605 | if (!gfh) { | |
e3d4d252 MR |
606 | return; |
607 | } | |
608 | ||
609 | fh = gfh->fh; | |
610 | ret = fflush(fh); | |
611 | if (ret == EOF) { | |
77dbc81b | 612 | error_setg_errno(errp, errno, "failed to flush file"); |
895b00f6 MAL |
613 | } else { |
614 | gfh->state = RW_STATE_NEW; | |
e3d4d252 MR |
615 | } |
616 | } | |
617 | ||
e72c3f2e MR |
618 | /* linux-specific implementations. avoid this if at all possible. */ |
619 | #if defined(__linux__) | |
620 | ||
eab5fd59 | 621 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
af02203f | 622 | typedef struct FsMount { |
e3d4d252 MR |
623 | char *dirname; |
624 | char *devtype; | |
46d4c572 | 625 | unsigned int devmajor, devminor; |
af02203f PB |
626 | QTAILQ_ENTRY(FsMount) next; |
627 | } FsMount; | |
e3d4d252 | 628 | |
e5d9adbd | 629 | typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; |
9e8aded4 | 630 | |
af02203f | 631 | static void free_fs_mount_list(FsMountList *mounts) |
9e8aded4 | 632 | { |
af02203f | 633 | FsMount *mount, *temp; |
9e8aded4 MR |
634 | |
635 | if (!mounts) { | |
636 | return; | |
637 | } | |
638 | ||
639 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
640 | QTAILQ_REMOVE(mounts, mount, next); | |
641 | g_free(mount->dirname); | |
642 | g_free(mount->devtype); | |
643 | g_free(mount); | |
644 | } | |
645 | } | |
646 | ||
46d4c572 TS |
647 | static int dev_major_minor(const char *devpath, |
648 | unsigned int *devmajor, unsigned int *devminor) | |
649 | { | |
650 | struct stat st; | |
651 | ||
652 | *devmajor = 0; | |
653 | *devminor = 0; | |
654 | ||
655 | if (stat(devpath, &st) < 0) { | |
656 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); | |
657 | return -1; | |
658 | } | |
659 | if (S_ISDIR(st.st_mode)) { | |
660 | /* It is bind mount */ | |
661 | return -2; | |
662 | } | |
663 | if (S_ISBLK(st.st_mode)) { | |
664 | *devmajor = major(st.st_rdev); | |
665 | *devminor = minor(st.st_rdev); | |
666 | return 0; | |
667 | } | |
668 | return -1; | |
669 | } | |
670 | ||
e3d4d252 MR |
671 | /* |
672 | * Walk the mount table and build a list of local file systems | |
673 | */ | |
46d4c572 | 674 | static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) |
e3d4d252 MR |
675 | { |
676 | struct mntent *ment; | |
af02203f | 677 | FsMount *mount; |
9e2fa418 | 678 | char const *mtab = "/proc/self/mounts"; |
e3d4d252 | 679 | FILE *fp; |
46d4c572 | 680 | unsigned int devmajor, devminor; |
e3d4d252 | 681 | |
e3d4d252 MR |
682 | fp = setmntent(mtab, "r"); |
683 | if (!fp) { | |
77dbc81b | 684 | error_setg(errp, "failed to open mtab file: '%s'", mtab); |
261551d1 | 685 | return; |
e3d4d252 MR |
686 | } |
687 | ||
688 | while ((ment = getmntent(fp))) { | |
689 | /* | |
690 | * An entry which device name doesn't start with a '/' is | |
691 | * either a dummy file system or a network file system. | |
692 | * Add special handling for smbfs and cifs as is done by | |
693 | * coreutils as well. | |
694 | */ | |
695 | if ((ment->mnt_fsname[0] != '/') || | |
696 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
697 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
698 | continue; | |
699 | } | |
46d4c572 TS |
700 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { |
701 | /* Skip bind mounts */ | |
702 | continue; | |
703 | } | |
e3d4d252 | 704 | |
f3a06403 | 705 | mount = g_new0(FsMount, 1); |
7267c094 AL |
706 | mount->dirname = g_strdup(ment->mnt_dir); |
707 | mount->devtype = g_strdup(ment->mnt_type); | |
46d4c572 TS |
708 | mount->devmajor = devmajor; |
709 | mount->devminor = devminor; | |
e3d4d252 | 710 | |
9e8aded4 | 711 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
712 | } |
713 | ||
714 | endmntent(fp); | |
e3d4d252 | 715 | } |
46d4c572 TS |
716 | |
717 | static void decode_mntname(char *name, int len) | |
718 | { | |
719 | int i, j = 0; | |
720 | for (i = 0; i <= len; i++) { | |
721 | if (name[i] != '\\') { | |
722 | name[j++] = name[i]; | |
723 | } else if (name[i + 1] == '\\') { | |
724 | name[j++] = '\\'; | |
725 | i++; | |
726 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && | |
727 | name[i + 2] >= '0' && name[i + 2] <= '7' && | |
728 | name[i + 3] >= '0' && name[i + 3] <= '7') { | |
729 | name[j++] = (name[i + 1] - '0') * 64 + | |
730 | (name[i + 2] - '0') * 8 + | |
731 | (name[i + 3] - '0'); | |
732 | i += 3; | |
733 | } else { | |
734 | name[j++] = name[i]; | |
735 | } | |
736 | } | |
737 | } | |
738 | ||
739 | static void build_fs_mount_list(FsMountList *mounts, Error **errp) | |
740 | { | |
741 | FsMount *mount; | |
742 | char const *mountinfo = "/proc/self/mountinfo"; | |
743 | FILE *fp; | |
744 | char *line = NULL, *dash; | |
745 | size_t n; | |
746 | char check; | |
747 | unsigned int devmajor, devminor; | |
748 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; | |
749 | ||
750 | fp = fopen(mountinfo, "r"); | |
751 | if (!fp) { | |
752 | build_fs_mount_list_from_mtab(mounts, errp); | |
753 | return; | |
754 | } | |
755 | ||
756 | while (getline(&line, &n, fp) != -1) { | |
757 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", | |
758 | &devmajor, &devminor, &dir_s, &dir_e, &check); | |
759 | if (ret < 3) { | |
760 | continue; | |
761 | } | |
762 | dash = strstr(line + dir_e, " - "); | |
763 | if (!dash) { | |
764 | continue; | |
765 | } | |
766 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", | |
767 | &type_s, &type_e, &dev_s, &dev_e, &check); | |
768 | if (ret < 1) { | |
769 | continue; | |
770 | } | |
771 | line[dir_e] = 0; | |
772 | dash[type_e] = 0; | |
773 | dash[dev_e] = 0; | |
774 | decode_mntname(line + dir_s, dir_e - dir_s); | |
775 | decode_mntname(dash + dev_s, dev_e - dev_s); | |
776 | if (devmajor == 0) { | |
777 | /* btrfs reports major number = 0 */ | |
778 | if (strcmp("btrfs", dash + type_s) != 0 || | |
779 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { | |
780 | continue; | |
781 | } | |
782 | } | |
783 | ||
f3a06403 | 784 | mount = g_new0(FsMount, 1); |
46d4c572 TS |
785 | mount->dirname = g_strdup(line + dir_s); |
786 | mount->devtype = g_strdup(dash + type_s); | |
787 | mount->devmajor = devmajor; | |
788 | mount->devminor = devminor; | |
789 | ||
790 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
791 | } | |
792 | free(line); | |
793 | ||
794 | fclose(fp); | |
795 | } | |
eab5fd59 PB |
796 | #endif |
797 | ||
798 | #if defined(CONFIG_FSFREEZE) | |
e3d4d252 | 799 | |
46d4c572 TS |
800 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) |
801 | { | |
802 | char *path; | |
803 | char *dpath; | |
804 | char *driver = NULL; | |
805 | char buf[PATH_MAX]; | |
806 | ssize_t len; | |
807 | ||
808 | path = g_strndup(syspath, pathlen); | |
809 | dpath = g_strdup_printf("%s/driver", path); | |
810 | len = readlink(dpath, buf, sizeof(buf) - 1); | |
811 | if (len != -1) { | |
812 | buf[len] = 0; | |
3e015d81 | 813 | driver = g_path_get_basename(buf); |
46d4c572 TS |
814 | } |
815 | g_free(dpath); | |
816 | g_free(path); | |
817 | return driver; | |
818 | } | |
819 | ||
820 | static int compare_uint(const void *_a, const void *_b) | |
821 | { | |
822 | unsigned int a = *(unsigned int *)_a; | |
823 | unsigned int b = *(unsigned int *)_b; | |
824 | ||
825 | return a < b ? -1 : a > b ? 1 : 0; | |
826 | } | |
827 | ||
828 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ | |
829 | static int build_hosts(char const *syspath, char const *host, bool ata, | |
830 | unsigned int *hosts, int hosts_max, Error **errp) | |
831 | { | |
832 | char *path; | |
833 | DIR *dir; | |
834 | struct dirent *entry; | |
835 | int i = 0; | |
836 | ||
837 | path = g_strndup(syspath, host - syspath); | |
838 | dir = opendir(path); | |
839 | if (!dir) { | |
840 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); | |
841 | g_free(path); | |
842 | return -1; | |
843 | } | |
844 | ||
845 | while (i < hosts_max) { | |
846 | entry = readdir(dir); | |
847 | if (!entry) { | |
848 | break; | |
849 | } | |
850 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { | |
851 | ++i; | |
852 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { | |
853 | ++i; | |
854 | } | |
855 | } | |
856 | ||
857 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); | |
858 | ||
859 | g_free(path); | |
860 | closedir(dir); | |
861 | return i; | |
862 | } | |
863 | ||
d9fe4f0f TH |
864 | /* |
865 | * Store disk device info for devices on the PCI bus. | |
866 | * Returns true if information has been stored, or false for failure. | |
867 | */ | |
868 | static bool build_guest_fsinfo_for_pci_dev(char const *syspath, | |
869 | GuestDiskAddress *disk, | |
870 | Error **errp) | |
46d4c572 TS |
871 | { |
872 | unsigned int pci[4], host, hosts[8], tgt[3]; | |
873 | int i, nhosts = 0, pcilen; | |
d9fe4f0f | 874 | GuestPCIAddress *pciaddr = disk->pci_controller; |
46d4c572 TS |
875 | bool has_ata = false, has_host = false, has_tgt = false; |
876 | char *p, *q, *driver = NULL; | |
d9fe4f0f | 877 | bool ret = false; |
46d4c572 TS |
878 | |
879 | p = strstr(syspath, "/devices/pci"); | |
880 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", | |
881 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { | |
743c71d0 | 882 | g_debug("only pci device is supported: sysfs path '%s'", syspath); |
d9fe4f0f | 883 | return false; |
46d4c572 TS |
884 | } |
885 | ||
743c71d0 MAL |
886 | p += 12 + pcilen; |
887 | while (true) { | |
888 | driver = get_pci_driver(syspath, p - syspath, errp); | |
889 | if (driver && (g_str_equal(driver, "ata_piix") || | |
890 | g_str_equal(driver, "sym53c8xx") || | |
891 | g_str_equal(driver, "virtio-pci") || | |
892 | g_str_equal(driver, "ahci"))) { | |
893 | break; | |
894 | } | |
895 | ||
bb23a736 | 896 | g_free(driver); |
743c71d0 MAL |
897 | if (sscanf(p, "/%x:%x:%x.%x%n", |
898 | pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { | |
899 | p += pcilen; | |
900 | continue; | |
901 | } | |
902 | ||
903 | g_debug("unsupported driver or sysfs path '%s'", syspath); | |
d9fe4f0f | 904 | return false; |
46d4c572 TS |
905 | } |
906 | ||
907 | p = strstr(syspath, "/target"); | |
908 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
909 | tgt, tgt + 1, tgt + 2) == 3) { | |
910 | has_tgt = true; | |
911 | } | |
912 | ||
913 | p = strstr(syspath, "/ata"); | |
914 | if (p) { | |
915 | q = p + 4; | |
916 | has_ata = true; | |
917 | } else { | |
918 | p = strstr(syspath, "/host"); | |
919 | q = p + 5; | |
920 | } | |
921 | if (p && sscanf(q, "%u", &host) == 1) { | |
922 | has_host = true; | |
923 | nhosts = build_hosts(syspath, p, has_ata, hosts, | |
01a6df1b | 924 | ARRAY_SIZE(hosts), errp); |
46d4c572 TS |
925 | if (nhosts < 0) { |
926 | goto cleanup; | |
927 | } | |
928 | } | |
929 | ||
46d4c572 TS |
930 | pciaddr->domain = pci[0]; |
931 | pciaddr->bus = pci[1]; | |
932 | pciaddr->slot = pci[2]; | |
933 | pciaddr->function = pci[3]; | |
934 | ||
46d4c572 TS |
935 | if (strcmp(driver, "ata_piix") == 0) { |
936 | /* a host per ide bus, target*:0:<unit>:0 */ | |
937 | if (!has_host || !has_tgt) { | |
938 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
939 | goto cleanup; | |
940 | } | |
941 | for (i = 0; i < nhosts; i++) { | |
942 | if (host == hosts[i]) { | |
943 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; | |
944 | disk->bus = i; | |
945 | disk->unit = tgt[1]; | |
946 | break; | |
947 | } | |
948 | } | |
949 | if (i >= nhosts) { | |
950 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
951 | goto cleanup; | |
952 | } | |
953 | } else if (strcmp(driver, "sym53c8xx") == 0) { | |
954 | /* scsi(LSI Logic): target*:0:<unit>:0 */ | |
955 | if (!has_tgt) { | |
956 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
957 | goto cleanup; | |
958 | } | |
959 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
960 | disk->unit = tgt[1]; | |
961 | } else if (strcmp(driver, "virtio-pci") == 0) { | |
962 | if (has_tgt) { | |
963 | /* virtio-scsi: target*:0:0:<unit> */ | |
964 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
965 | disk->unit = tgt[2]; | |
966 | } else { | |
967 | /* virtio-blk: 1 disk per 1 device */ | |
968 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
969 | } | |
970 | } else if (strcmp(driver, "ahci") == 0) { | |
971 | /* ahci: 1 host per 1 unit */ | |
972 | if (!has_host || !has_tgt) { | |
973 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
974 | goto cleanup; | |
975 | } | |
976 | for (i = 0; i < nhosts; i++) { | |
977 | if (host == hosts[i]) { | |
978 | disk->unit = i; | |
979 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; | |
980 | break; | |
981 | } | |
982 | } | |
983 | if (i >= nhosts) { | |
984 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
985 | goto cleanup; | |
986 | } | |
987 | } else { | |
988 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); | |
989 | goto cleanup; | |
990 | } | |
991 | ||
d9fe4f0f | 992 | ret = true; |
46d4c572 TS |
993 | |
994 | cleanup: | |
46d4c572 | 995 | g_free(driver); |
d9fe4f0f TH |
996 | return ret; |
997 | } | |
998 | ||
23843c12 TH |
999 | /* |
1000 | * Store disk device info for non-PCI virtio devices (for example s390x | |
1001 | * channel I/O devices). Returns true if information has been stored, or | |
1002 | * false for failure. | |
1003 | */ | |
1004 | static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, | |
1005 | GuestDiskAddress *disk, | |
1006 | Error **errp) | |
1007 | { | |
1008 | unsigned int tgt[3]; | |
1009 | char *p; | |
1010 | ||
1011 | if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { | |
1012 | g_debug("Unsupported virtio device '%s'", syspath); | |
1013 | return false; | |
1014 | } | |
1015 | ||
1016 | p = strstr(syspath, "/target"); | |
1017 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
1018 | &tgt[0], &tgt[1], &tgt[2]) == 3) { | |
1019 | /* virtio-scsi: target*:0:<target>:<unit> */ | |
1020 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
1021 | disk->bus = tgt[0]; | |
1022 | disk->target = tgt[1]; | |
1023 | disk->unit = tgt[2]; | |
1024 | } else { | |
1025 | /* virtio-blk: 1 disk per 1 device */ | |
1026 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
1027 | } | |
1028 | ||
1029 | return true; | |
1030 | } | |
1031 | ||
d9fe4f0f TH |
1032 | /* Store disk device info specified by @sysfs into @fs */ |
1033 | static void build_guest_fsinfo_for_real_device(char const *syspath, | |
1034 | GuestFilesystemInfo *fs, | |
1035 | Error **errp) | |
1036 | { | |
1037 | GuestDiskAddress *disk; | |
1038 | GuestPCIAddress *pciaddr; | |
1039 | GuestDiskAddressList *list = NULL; | |
1040 | bool has_hwinf; | |
43dadc43 TH |
1041 | #ifdef CONFIG_LIBUDEV |
1042 | struct udev *udev = NULL; | |
1043 | struct udev_device *udevice = NULL; | |
1044 | #endif | |
d9fe4f0f TH |
1045 | |
1046 | pciaddr = g_new0(GuestPCIAddress, 1); | |
43dadc43 TH |
1047 | pciaddr->domain = -1; /* -1 means field is invalid */ |
1048 | pciaddr->bus = -1; | |
1049 | pciaddr->slot = -1; | |
1050 | pciaddr->function = -1; | |
d9fe4f0f TH |
1051 | |
1052 | disk = g_new0(GuestDiskAddress, 1); | |
1053 | disk->pci_controller = pciaddr; | |
43dadc43 | 1054 | disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; |
d9fe4f0f TH |
1055 | |
1056 | list = g_new0(GuestDiskAddressList, 1); | |
1057 | list->value = disk; | |
1058 | ||
43dadc43 TH |
1059 | #ifdef CONFIG_LIBUDEV |
1060 | udev = udev_new(); | |
1061 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1062 | if (udev == NULL || udevice == NULL) { | |
1063 | g_debug("failed to query udev"); | |
1064 | } else { | |
1065 | const char *devnode, *serial; | |
1066 | devnode = udev_device_get_devnode(udevice); | |
1067 | if (devnode != NULL) { | |
1068 | disk->dev = g_strdup(devnode); | |
1069 | disk->has_dev = true; | |
1070 | } | |
1071 | serial = udev_device_get_property_value(udevice, "ID_SERIAL"); | |
1072 | if (serial != NULL && *serial != 0) { | |
1073 | disk->serial = g_strdup(serial); | |
1074 | disk->has_serial = true; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | udev_unref(udev); | |
1079 | udev_device_unref(udevice); | |
1080 | #endif | |
1081 | ||
23843c12 TH |
1082 | if (strstr(syspath, "/devices/pci")) { |
1083 | has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); | |
1084 | } else if (strstr(syspath, "/virtio")) { | |
1085 | has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1086 | } else { | |
1087 | g_debug("Unsupported device type for '%s'", syspath); | |
1088 | has_hwinf = false; | |
1089 | } | |
d9fe4f0f | 1090 | |
43dadc43 | 1091 | if (has_hwinf || disk->has_dev || disk->has_serial) { |
d9fe4f0f TH |
1092 | list->next = fs->disk; |
1093 | fs->disk = list; | |
1094 | } else { | |
1095 | qapi_free_GuestDiskAddressList(list); | |
1096 | } | |
46d4c572 TS |
1097 | } |
1098 | ||
1099 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1100 | GuestFilesystemInfo *fs, | |
1101 | Error **errp); | |
1102 | ||
1103 | /* Store a list of slave devices of virtual volume specified by @syspath into | |
1104 | * @fs */ | |
1105 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, | |
1106 | GuestFilesystemInfo *fs, | |
1107 | Error **errp) | |
1108 | { | |
292743d9 | 1109 | Error *err = NULL; |
46d4c572 TS |
1110 | DIR *dir; |
1111 | char *dirpath; | |
e668d1b8 | 1112 | struct dirent *entry; |
46d4c572 TS |
1113 | |
1114 | dirpath = g_strdup_printf("%s/slaves", syspath); | |
1115 | dir = opendir(dirpath); | |
1116 | if (!dir) { | |
8251a72f MR |
1117 | if (errno != ENOENT) { |
1118 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); | |
1119 | } | |
46d4c572 TS |
1120 | g_free(dirpath); |
1121 | return; | |
1122 | } | |
46d4c572 TS |
1123 | |
1124 | for (;;) { | |
e668d1b8 HZ |
1125 | errno = 0; |
1126 | entry = readdir(dir); | |
1127 | if (entry == NULL) { | |
1128 | if (errno) { | |
1129 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); | |
1130 | } | |
46d4c572 TS |
1131 | break; |
1132 | } | |
1133 | ||
e668d1b8 HZ |
1134 | if (entry->d_type == DT_LNK) { |
1135 | char *path; | |
1136 | ||
1137 | g_debug(" slave device '%s'", entry->d_name); | |
1138 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); | |
292743d9 | 1139 | build_guest_fsinfo_for_device(path, fs, &err); |
e668d1b8 | 1140 | g_free(path); |
46d4c572 | 1141 | |
292743d9 MA |
1142 | if (err) { |
1143 | error_propagate(errp, err); | |
46d4c572 TS |
1144 | break; |
1145 | } | |
1146 | } | |
1147 | } | |
1148 | ||
e668d1b8 | 1149 | g_free(dirpath); |
46d4c572 TS |
1150 | closedir(dir); |
1151 | } | |
1152 | ||
fed39564 TG |
1153 | static bool is_disk_virtual(const char *devpath, Error **errp) |
1154 | { | |
1155 | g_autofree char *syspath = realpath(devpath, NULL); | |
1156 | ||
1157 | if (!syspath) { | |
1158 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1159 | return false; | |
1160 | } | |
1161 | return strstr(syspath, "/devices/virtual/block/") != NULL; | |
1162 | } | |
1163 | ||
46d4c572 TS |
1164 | /* Dispatch to functions for virtual/real device */ |
1165 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1166 | GuestFilesystemInfo *fs, | |
1167 | Error **errp) | |
1168 | { | |
fed39564 TG |
1169 | ERRP_GUARD(); |
1170 | g_autofree char *syspath = NULL; | |
1171 | bool is_virtual = false; | |
46d4c572 | 1172 | |
fed39564 | 1173 | syspath = realpath(devpath, NULL); |
46d4c572 TS |
1174 | if (!syspath) { |
1175 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1176 | return; | |
1177 | } | |
1178 | ||
1179 | if (!fs->name) { | |
3e015d81 | 1180 | fs->name = g_path_get_basename(syspath); |
46d4c572 TS |
1181 | } |
1182 | ||
1183 | g_debug(" parse sysfs path '%s'", syspath); | |
fed39564 TG |
1184 | is_virtual = is_disk_virtual(syspath, errp); |
1185 | if (*errp != NULL) { | |
1186 | return; | |
1187 | } | |
1188 | if (is_virtual) { | |
46d4c572 TS |
1189 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); |
1190 | } else { | |
1191 | build_guest_fsinfo_for_real_device(syspath, fs, errp); | |
1192 | } | |
fed39564 TG |
1193 | } |
1194 | ||
1195 | #ifdef CONFIG_LIBUDEV | |
1196 | ||
1197 | /* | |
1198 | * Wrapper around build_guest_fsinfo_for_device() for getting just | |
1199 | * the disk address. | |
1200 | */ | |
1201 | static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) | |
1202 | { | |
1203 | g_autoptr(GuestFilesystemInfo) fs = NULL; | |
46d4c572 | 1204 | |
fed39564 TG |
1205 | fs = g_new0(GuestFilesystemInfo, 1); |
1206 | build_guest_fsinfo_for_device(syspath, fs, errp); | |
1207 | if (fs->disk != NULL) { | |
1208 | return g_steal_pointer(&fs->disk->value); | |
1209 | } | |
1210 | return NULL; | |
46d4c572 TS |
1211 | } |
1212 | ||
fed39564 TG |
1213 | static char *get_alias_for_syspath(const char *syspath) |
1214 | { | |
1215 | struct udev *udev = NULL; | |
1216 | struct udev_device *udevice = NULL; | |
1217 | char *ret = NULL; | |
1218 | ||
1219 | udev = udev_new(); | |
1220 | if (udev == NULL) { | |
1221 | g_debug("failed to query udev"); | |
1222 | goto out; | |
1223 | } | |
1224 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1225 | if (udevice == NULL) { | |
1226 | g_debug("failed to query udev for path: %s", syspath); | |
1227 | goto out; | |
1228 | } else { | |
1229 | const char *alias = udev_device_get_property_value( | |
1230 | udevice, "DM_NAME"); | |
1231 | /* | |
1232 | * NULL means there was an error and empty string means there is no | |
1233 | * alias. In case of no alias we return NULL instead of empty string. | |
1234 | */ | |
1235 | if (alias == NULL) { | |
1236 | g_debug("failed to query udev for device alias for: %s", | |
1237 | syspath); | |
1238 | } else if (*alias != 0) { | |
1239 | ret = g_strdup(alias); | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | out: | |
1244 | udev_unref(udev); | |
1245 | udev_device_unref(udevice); | |
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | static char *get_device_for_syspath(const char *syspath) | |
1250 | { | |
1251 | struct udev *udev = NULL; | |
1252 | struct udev_device *udevice = NULL; | |
1253 | char *ret = NULL; | |
1254 | ||
1255 | udev = udev_new(); | |
1256 | if (udev == NULL) { | |
1257 | g_debug("failed to query udev"); | |
1258 | goto out; | |
1259 | } | |
1260 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1261 | if (udevice == NULL) { | |
1262 | g_debug("failed to query udev for path: %s", syspath); | |
1263 | goto out; | |
1264 | } else { | |
1265 | ret = g_strdup(udev_device_get_devnode(udevice)); | |
1266 | } | |
1267 | ||
1268 | out: | |
1269 | udev_unref(udev); | |
1270 | udev_device_unref(udevice); | |
1271 | return ret; | |
1272 | } | |
1273 | ||
1274 | static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) | |
1275 | { | |
1276 | g_autofree char *deps_dir = NULL; | |
1277 | const gchar *dep; | |
1278 | GDir *dp_deps = NULL; | |
1279 | ||
1280 | /* List dependent disks */ | |
1281 | deps_dir = g_strdup_printf("%s/slaves", disk_dir); | |
1282 | g_debug(" listing entries in: %s", deps_dir); | |
1283 | dp_deps = g_dir_open(deps_dir, 0, NULL); | |
1284 | if (dp_deps == NULL) { | |
1285 | g_debug("failed to list entries in %s", deps_dir); | |
1286 | return; | |
1287 | } | |
1288 | while ((dep = g_dir_read_name(dp_deps)) != NULL) { | |
1289 | g_autofree char *dep_dir = NULL; | |
1290 | strList *dep_item = NULL; | |
1291 | char *dev_name; | |
1292 | ||
1293 | /* Add dependent disks */ | |
1294 | dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); | |
1295 | dev_name = get_device_for_syspath(dep_dir); | |
1296 | if (dev_name != NULL) { | |
1297 | g_debug(" adding dependent device: %s", dev_name); | |
1298 | dep_item = g_new0(strList, 1); | |
1299 | dep_item->value = dev_name; | |
1300 | dep_item->next = disk->dependents; | |
1301 | disk->dependents = dep_item; | |
1302 | } | |
1303 | } | |
1304 | g_dir_close(dp_deps); | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Detect partitions subdirectory, name is "<disk_name><number>" or | |
1309 | * "<disk_name>p<number>" | |
1310 | * | |
1311 | * @disk_name -- last component of /sys path (e.g. sda) | |
1312 | * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) | |
1313 | * @disk_dev -- device node of the disk (e.g. /dev/sda) | |
1314 | */ | |
1315 | static GuestDiskInfoList *get_disk_partitions( | |
1316 | GuestDiskInfoList *list, | |
1317 | const char *disk_name, const char *disk_dir, | |
1318 | const char *disk_dev) | |
1319 | { | |
1320 | GuestDiskInfoList *item, *ret = list; | |
1321 | struct dirent *de_disk; | |
1322 | DIR *dp_disk = NULL; | |
1323 | size_t len = strlen(disk_name); | |
1324 | ||
1325 | dp_disk = opendir(disk_dir); | |
1326 | while ((de_disk = readdir(dp_disk)) != NULL) { | |
1327 | g_autofree char *partition_dir = NULL; | |
1328 | char *dev_name; | |
1329 | GuestDiskInfo *partition; | |
1330 | ||
1331 | if (!(de_disk->d_type & DT_DIR)) { | |
1332 | continue; | |
1333 | } | |
1334 | ||
1335 | if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && | |
1336 | ((*(de_disk->d_name + len) == 'p' && | |
1337 | isdigit(*(de_disk->d_name + len + 1))) || | |
1338 | isdigit(*(de_disk->d_name + len))))) { | |
1339 | continue; | |
1340 | } | |
1341 | ||
1342 | partition_dir = g_strdup_printf("%s/%s", | |
1343 | disk_dir, de_disk->d_name); | |
1344 | dev_name = get_device_for_syspath(partition_dir); | |
1345 | if (dev_name == NULL) { | |
1346 | g_debug("Failed to get device name for syspath: %s", | |
1347 | disk_dir); | |
1348 | continue; | |
1349 | } | |
1350 | partition = g_new0(GuestDiskInfo, 1); | |
1351 | partition->name = dev_name; | |
1352 | partition->partition = true; | |
1353 | /* Add parent disk as dependent for easier tracking of hierarchy */ | |
1354 | partition->dependents = g_new0(strList, 1); | |
1355 | partition->dependents->value = g_strdup(disk_dev); | |
1356 | ||
1357 | item = g_new0(GuestDiskInfoList, 1); | |
1358 | item->value = partition; | |
1359 | item->next = ret; | |
1360 | ret = item; | |
1361 | ||
1362 | } | |
1363 | closedir(dp_disk); | |
1364 | ||
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1369 | { | |
1370 | GuestDiskInfoList *item, *ret = NULL; | |
1371 | GuestDiskInfo *disk; | |
1372 | DIR *dp = NULL; | |
1373 | struct dirent *de = NULL; | |
1374 | ||
1375 | g_debug("listing /sys/block directory"); | |
1376 | dp = opendir("/sys/block"); | |
1377 | if (dp == NULL) { | |
1378 | error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); | |
1379 | return NULL; | |
1380 | } | |
1381 | while ((de = readdir(dp)) != NULL) { | |
1382 | g_autofree char *disk_dir = NULL, *line = NULL, | |
1383 | *size_path = NULL; | |
1384 | char *dev_name; | |
1385 | Error *local_err = NULL; | |
1386 | if (de->d_type != DT_LNK) { | |
1387 | g_debug(" skipping entry: %s", de->d_name); | |
1388 | continue; | |
1389 | } | |
1390 | ||
1391 | /* Check size and skip zero-sized disks */ | |
1392 | g_debug(" checking disk size"); | |
1393 | size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); | |
1394 | if (!g_file_get_contents(size_path, &line, NULL, NULL)) { | |
1395 | g_debug(" failed to read disk size"); | |
1396 | continue; | |
1397 | } | |
1398 | if (g_strcmp0(line, "0\n") == 0) { | |
1399 | g_debug(" skipping zero-sized disk"); | |
1400 | continue; | |
1401 | } | |
1402 | ||
1403 | g_debug(" adding %s", de->d_name); | |
1404 | disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); | |
1405 | dev_name = get_device_for_syspath(disk_dir); | |
1406 | if (dev_name == NULL) { | |
1407 | g_debug("Failed to get device name for syspath: %s", | |
1408 | disk_dir); | |
1409 | continue; | |
1410 | } | |
1411 | disk = g_new0(GuestDiskInfo, 1); | |
1412 | disk->name = dev_name; | |
1413 | disk->partition = false; | |
1414 | disk->alias = get_alias_for_syspath(disk_dir); | |
1415 | disk->has_alias = (disk->alias != NULL); | |
1416 | item = g_new0(GuestDiskInfoList, 1); | |
1417 | item->value = disk; | |
1418 | item->next = ret; | |
1419 | ret = item; | |
1420 | ||
1421 | /* Get address for non-virtual devices */ | |
1422 | bool is_virtual = is_disk_virtual(disk_dir, &local_err); | |
1423 | if (local_err != NULL) { | |
1424 | g_debug(" failed to check disk path, ignoring error: %s", | |
1425 | error_get_pretty(local_err)); | |
1426 | error_free(local_err); | |
1427 | local_err = NULL; | |
1428 | /* Don't try to get the address */ | |
1429 | is_virtual = true; | |
1430 | } | |
1431 | if (!is_virtual) { | |
1432 | disk->address = get_disk_address(disk_dir, &local_err); | |
1433 | if (local_err != NULL) { | |
1434 | g_debug(" failed to get device info, ignoring error: %s", | |
1435 | error_get_pretty(local_err)); | |
1436 | error_free(local_err); | |
1437 | local_err = NULL; | |
1438 | } else if (disk->address != NULL) { | |
1439 | disk->has_address = true; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | get_disk_deps(disk_dir, disk); | |
1444 | ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); | |
1445 | } | |
1446 | return ret; | |
1447 | } | |
1448 | ||
1449 | #else | |
1450 | ||
1451 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1452 | { | |
1453 | error_setg(errp, QERR_UNSUPPORTED); | |
1454 | return NULL; | |
1455 | } | |
1456 | ||
1457 | #endif | |
1458 | ||
46d4c572 TS |
1459 | /* Return a list of the disk device(s)' info which @mount lies on */ |
1460 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, | |
1461 | Error **errp) | |
1462 | { | |
1463 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); | |
25b5ff1a CH |
1464 | struct statvfs buf; |
1465 | unsigned long used, nonroot_total, fr_size; | |
46d4c572 TS |
1466 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", |
1467 | mount->devmajor, mount->devminor); | |
1468 | ||
1469 | fs->mountpoint = g_strdup(mount->dirname); | |
1470 | fs->type = g_strdup(mount->devtype); | |
1471 | build_guest_fsinfo_for_device(devpath, fs, errp); | |
1472 | ||
25b5ff1a CH |
1473 | if (statvfs(fs->mountpoint, &buf) == 0) { |
1474 | fr_size = buf.f_frsize; | |
1475 | used = buf.f_blocks - buf.f_bfree; | |
1476 | nonroot_total = used + buf.f_bavail; | |
1477 | fs->used_bytes = used * fr_size; | |
1478 | fs->total_bytes = nonroot_total * fr_size; | |
1479 | ||
1480 | fs->has_total_bytes = true; | |
1481 | fs->has_used_bytes = true; | |
1482 | } | |
1483 | ||
46d4c572 | 1484 | g_free(devpath); |
25b5ff1a | 1485 | |
46d4c572 TS |
1486 | return fs; |
1487 | } | |
1488 | ||
1489 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
1490 | { | |
1491 | FsMountList mounts; | |
1492 | struct FsMount *mount; | |
1493 | GuestFilesystemInfoList *new, *ret = NULL; | |
1494 | Error *local_err = NULL; | |
1495 | ||
1496 | QTAILQ_INIT(&mounts); | |
1497 | build_fs_mount_list(&mounts, &local_err); | |
1498 | if (local_err) { | |
1499 | error_propagate(errp, local_err); | |
1500 | return NULL; | |
1501 | } | |
1502 | ||
1503 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1504 | g_debug("Building guest fsinfo for '%s'", mount->dirname); | |
1505 | ||
1506 | new = g_malloc0(sizeof(*ret)); | |
1507 | new->value = build_guest_fsinfo(mount, &local_err); | |
1508 | new->next = ret; | |
1509 | ret = new; | |
1510 | if (local_err) { | |
1511 | error_propagate(errp, local_err); | |
1512 | qapi_free_GuestFilesystemInfoList(ret); | |
1513 | ret = NULL; | |
1514 | break; | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | free_fs_mount_list(&mounts); | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | ||
ec0f694c TS |
1523 | typedef enum { |
1524 | FSFREEZE_HOOK_THAW = 0, | |
1525 | FSFREEZE_HOOK_FREEZE, | |
1526 | } FsfreezeHookArg; | |
1527 | ||
13a439ec | 1528 | static const char *fsfreeze_hook_arg_string[] = { |
ec0f694c TS |
1529 | "thaw", |
1530 | "freeze", | |
1531 | }; | |
1532 | ||
77dbc81b | 1533 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) |
ec0f694c TS |
1534 | { |
1535 | int status; | |
1536 | pid_t pid; | |
1537 | const char *hook; | |
1538 | const char *arg_str = fsfreeze_hook_arg_string[arg]; | |
1539 | Error *local_err = NULL; | |
1540 | ||
1541 | hook = ga_fsfreeze_hook(ga_state); | |
1542 | if (!hook) { | |
1543 | return; | |
1544 | } | |
1545 | if (access(hook, X_OK) != 0) { | |
77dbc81b | 1546 | error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); |
ec0f694c TS |
1547 | return; |
1548 | } | |
1549 | ||
1550 | slog("executing fsfreeze hook with arg '%s'", arg_str); | |
1551 | pid = fork(); | |
1552 | if (pid == 0) { | |
1553 | setsid(); | |
1554 | reopen_fd_to_null(0); | |
1555 | reopen_fd_to_null(1); | |
1556 | reopen_fd_to_null(2); | |
1557 | ||
1558 | execle(hook, hook, arg_str, NULL, environ); | |
1559 | _exit(EXIT_FAILURE); | |
1560 | } else if (pid < 0) { | |
77dbc81b | 1561 | error_setg_errno(errp, errno, "failed to create child process"); |
ec0f694c TS |
1562 | return; |
1563 | } | |
1564 | ||
1565 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 1566 | if (local_err) { |
77dbc81b | 1567 | error_propagate(errp, local_err); |
ec0f694c TS |
1568 | return; |
1569 | } | |
1570 | ||
1571 | if (!WIFEXITED(status)) { | |
77dbc81b | 1572 | error_setg(errp, "fsfreeze hook has terminated abnormally"); |
ec0f694c TS |
1573 | return; |
1574 | } | |
1575 | ||
1576 | status = WEXITSTATUS(status); | |
1577 | if (status) { | |
77dbc81b | 1578 | error_setg(errp, "fsfreeze hook has failed with status %d", status); |
ec0f694c TS |
1579 | return; |
1580 | } | |
1581 | } | |
1582 | ||
e3d4d252 MR |
1583 | /* |
1584 | * Return status of freeze/thaw | |
1585 | */ | |
77dbc81b | 1586 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e3d4d252 | 1587 | { |
f22d85e9 MR |
1588 | if (ga_is_frozen(ga_state)) { |
1589 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
1590 | } | |
1591 | ||
1592 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
1593 | } |
1594 | ||
e99bce20 TS |
1595 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
1596 | { | |
1597 | return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); | |
1598 | } | |
1599 | ||
e3d4d252 MR |
1600 | /* |
1601 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
1602 | * are real local file systems. | |
1603 | */ | |
e99bce20 TS |
1604 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
1605 | strList *mountpoints, | |
1606 | Error **errp) | |
e3d4d252 MR |
1607 | { |
1608 | int ret = 0, i = 0; | |
e99bce20 | 1609 | strList *list; |
af02203f PB |
1610 | FsMountList mounts; |
1611 | struct FsMount *mount; | |
261551d1 | 1612 | Error *local_err = NULL; |
e3d4d252 | 1613 | int fd; |
e3d4d252 MR |
1614 | |
1615 | slog("guest-fsfreeze called"); | |
1616 | ||
ec0f694c | 1617 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); |
84d18f06 | 1618 | if (local_err) { |
77dbc81b | 1619 | error_propagate(errp, local_err); |
ec0f694c TS |
1620 | return -1; |
1621 | } | |
1622 | ||
9e8aded4 | 1623 | QTAILQ_INIT(&mounts); |
261551d1 | 1624 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1625 | if (local_err) { |
77dbc81b | 1626 | error_propagate(errp, local_err); |
261551d1 | 1627 | return -1; |
e3d4d252 MR |
1628 | } |
1629 | ||
1630 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 1631 | ga_set_frozen(ga_state); |
e3d4d252 | 1632 | |
eae3eb3e | 1633 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { |
e99bce20 TS |
1634 | /* To issue fsfreeze in the reverse order of mounts, check if the |
1635 | * mount is listed in the list here */ | |
1636 | if (has_mountpoints) { | |
1637 | for (list = mountpoints; list; list = list->next) { | |
1638 | if (strcmp(list->value, mount->dirname) == 0) { | |
1639 | break; | |
1640 | } | |
1641 | } | |
1642 | if (!list) { | |
1643 | continue; | |
1644 | } | |
1645 | } | |
1646 | ||
448058aa | 1647 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
e3d4d252 | 1648 | if (fd == -1) { |
77dbc81b | 1649 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); |
e3d4d252 MR |
1650 | goto error; |
1651 | } | |
1652 | ||
e35916ac MT |
1653 | /* we try to cull filesystems we know won't work in advance, but other |
1654 | * filesystems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
1655 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
1656 | * the number of frozen filesystems. | |
ce2eb6c4 PL |
1657 | * if a filesystem is mounted more than once (aka bind mount) a |
1658 | * consecutive attempt to freeze an already frozen filesystem will | |
1659 | * return EBUSY. | |
9e8aded4 MR |
1660 | * |
1661 | * any other error means a failure to freeze a filesystem we | |
1662 | * expect to be freezable, so return an error in those cases | |
1663 | * and return system to thawed state. | |
e3d4d252 MR |
1664 | */ |
1665 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 | 1666 | if (ret == -1) { |
ce2eb6c4 | 1667 | if (errno != EOPNOTSUPP && errno != EBUSY) { |
77dbc81b | 1668 | error_setg_errno(errp, errno, "failed to freeze %s", |
617fbbc1 | 1669 | mount->dirname); |
9e8aded4 MR |
1670 | close(fd); |
1671 | goto error; | |
1672 | } | |
1673 | } else { | |
1674 | i++; | |
e3d4d252 MR |
1675 | } |
1676 | close(fd); | |
e3d4d252 MR |
1677 | } |
1678 | ||
af02203f | 1679 | free_fs_mount_list(&mounts); |
65650f01 CH |
1680 | /* We may not issue any FIFREEZE here. |
1681 | * Just unset ga_state here and ready for the next call. | |
1682 | */ | |
1683 | if (i == 0) { | |
1684 | ga_unset_frozen(ga_state); | |
1685 | } | |
e3d4d252 MR |
1686 | return i; |
1687 | ||
1688 | error: | |
af02203f | 1689 | free_fs_mount_list(&mounts); |
9e8aded4 | 1690 | qmp_guest_fsfreeze_thaw(NULL); |
e3d4d252 MR |
1691 | return 0; |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Walk list of frozen file systems in the guest, and thaw them. | |
1696 | */ | |
77dbc81b | 1697 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e3d4d252 MR |
1698 | { |
1699 | int ret; | |
af02203f PB |
1700 | FsMountList mounts; |
1701 | FsMount *mount; | |
9e8aded4 | 1702 | int fd, i = 0, logged; |
261551d1 | 1703 | Error *local_err = NULL; |
9e8aded4 MR |
1704 | |
1705 | QTAILQ_INIT(&mounts); | |
261551d1 | 1706 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1707 | if (local_err) { |
77dbc81b | 1708 | error_propagate(errp, local_err); |
9e8aded4 MR |
1709 | return 0; |
1710 | } | |
e3d4d252 | 1711 | |
9e8aded4 MR |
1712 | QTAILQ_FOREACH(mount, &mounts, next) { |
1713 | logged = false; | |
448058aa | 1714 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
e3d4d252 | 1715 | if (fd == -1) { |
e3d4d252 MR |
1716 | continue; |
1717 | } | |
9e8aded4 MR |
1718 | /* we have no way of knowing whether a filesystem was actually unfrozen |
1719 | * as a result of a successful call to FITHAW, only that if an error | |
1720 | * was returned the filesystem was *not* unfrozen by that particular | |
1721 | * call. | |
1722 | * | |
a31f0531 | 1723 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
1724 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
1725 | * in which case either the filesystem is in an unfreezable state, or, | |
1726 | * more likely, it was thawed previously (and remains so afterward). | |
1727 | * | |
1728 | * also, since the most recent successful call is the one that did | |
1729 | * the actual unfreeze, we can use this to provide an accurate count | |
1730 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
1731 | * may * be useful for determining whether a filesystem was unfrozen | |
1732 | * during the freeze/thaw phase by a process other than qemu-ga. | |
1733 | */ | |
1734 | do { | |
1735 | ret = ioctl(fd, FITHAW); | |
1736 | if (ret == 0 && !logged) { | |
1737 | i++; | |
1738 | logged = true; | |
1739 | } | |
1740 | } while (ret == 0); | |
e3d4d252 | 1741 | close(fd); |
e3d4d252 MR |
1742 | } |
1743 | ||
f22d85e9 | 1744 | ga_unset_frozen(ga_state); |
af02203f | 1745 | free_fs_mount_list(&mounts); |
ec0f694c | 1746 | |
77dbc81b | 1747 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); |
ec0f694c | 1748 | |
e3d4d252 MR |
1749 | return i; |
1750 | } | |
1751 | ||
e3d4d252 MR |
1752 | static void guest_fsfreeze_cleanup(void) |
1753 | { | |
e3d4d252 MR |
1754 | Error *err = NULL; |
1755 | ||
f22d85e9 | 1756 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
6f686749 MA |
1757 | qmp_guest_fsfreeze_thaw(&err); |
1758 | if (err) { | |
1759 | slog("failed to clean up frozen filesystems: %s", | |
1760 | error_get_pretty(err)); | |
1761 | error_free(err); | |
e3d4d252 MR |
1762 | } |
1763 | } | |
1764 | } | |
e72c3f2e | 1765 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 1766 | |
eab5fd59 PB |
1767 | #if defined(CONFIG_FSTRIM) |
1768 | /* | |
1769 | * Walk list of mounted file systems in the guest, and trim them. | |
1770 | */ | |
e82855d9 JO |
1771 | GuestFilesystemTrimResponse * |
1772 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 1773 | { |
e82855d9 JO |
1774 | GuestFilesystemTrimResponse *response; |
1775 | GuestFilesystemTrimResultList *list; | |
1776 | GuestFilesystemTrimResult *result; | |
eab5fd59 PB |
1777 | int ret = 0; |
1778 | FsMountList mounts; | |
1779 | struct FsMount *mount; | |
1780 | int fd; | |
261551d1 | 1781 | Error *local_err = NULL; |
73a652a1 | 1782 | struct fstrim_range r; |
eab5fd59 PB |
1783 | |
1784 | slog("guest-fstrim called"); | |
1785 | ||
1786 | QTAILQ_INIT(&mounts); | |
261551d1 | 1787 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1788 | if (local_err) { |
77dbc81b | 1789 | error_propagate(errp, local_err); |
e82855d9 | 1790 | return NULL; |
eab5fd59 PB |
1791 | } |
1792 | ||
e82855d9 JO |
1793 | response = g_malloc0(sizeof(*response)); |
1794 | ||
eab5fd59 | 1795 | QTAILQ_FOREACH(mount, &mounts, next) { |
e82855d9 JO |
1796 | result = g_malloc0(sizeof(*result)); |
1797 | result->path = g_strdup(mount->dirname); | |
1798 | ||
1799 | list = g_malloc0(sizeof(*list)); | |
1800 | list->value = result; | |
1801 | list->next = response->paths; | |
1802 | response->paths = list; | |
1803 | ||
448058aa | 1804 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
eab5fd59 | 1805 | if (fd == -1) { |
e82855d9 JO |
1806 | result->error = g_strdup_printf("failed to open: %s", |
1807 | strerror(errno)); | |
1808 | result->has_error = true; | |
1809 | continue; | |
eab5fd59 PB |
1810 | } |
1811 | ||
e35916ac MT |
1812 | /* We try to cull filesystems we know won't work in advance, but other |
1813 | * filesystems may not implement fstrim for less obvious reasons. | |
1814 | * These will report EOPNOTSUPP; while in some other cases ENOTTY | |
1815 | * will be reported (e.g. CD-ROMs). | |
e82855d9 | 1816 | * Any other error means an unexpected error. |
eab5fd59 | 1817 | */ |
73a652a1 JO |
1818 | r.start = 0; |
1819 | r.len = -1; | |
1820 | r.minlen = has_minimum ? minimum : 0; | |
eab5fd59 PB |
1821 | ret = ioctl(fd, FITRIM, &r); |
1822 | if (ret == -1) { | |
e82855d9 JO |
1823 | result->has_error = true; |
1824 | if (errno == ENOTTY || errno == EOPNOTSUPP) { | |
1825 | result->error = g_strdup("trim not supported"); | |
1826 | } else { | |
1827 | result->error = g_strdup_printf("failed to trim: %s", | |
1828 | strerror(errno)); | |
eab5fd59 | 1829 | } |
e82855d9 JO |
1830 | close(fd); |
1831 | continue; | |
eab5fd59 | 1832 | } |
e82855d9 JO |
1833 | |
1834 | result->has_minimum = true; | |
1835 | result->minimum = r.minlen; | |
1836 | result->has_trimmed = true; | |
1837 | result->trimmed = r.len; | |
eab5fd59 PB |
1838 | close(fd); |
1839 | } | |
1840 | ||
eab5fd59 | 1841 | free_fs_mount_list(&mounts); |
e82855d9 | 1842 | return response; |
eab5fd59 PB |
1843 | } |
1844 | #endif /* CONFIG_FSTRIM */ | |
1845 | ||
1846 | ||
11d0f125 LC |
1847 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
1848 | #define SUSPEND_SUPPORTED 0 | |
1849 | #define SUSPEND_NOT_SUPPORTED 1 | |
1850 | ||
8b020b5e DHB |
1851 | typedef enum { |
1852 | SUSPEND_MODE_DISK = 0, | |
1853 | SUSPEND_MODE_RAM = 1, | |
1854 | SUSPEND_MODE_HYBRID = 2, | |
1855 | } SuspendMode; | |
1856 | ||
1857 | /* | |
1858 | * Executes a command in a child process using g_spawn_sync, | |
1859 | * returning an int >= 0 representing the exit status of the | |
1860 | * process. | |
1861 | * | |
1862 | * If the program wasn't found in path, returns -1. | |
1863 | * | |
1864 | * If a problem happened when creating the child process, | |
1865 | * returns -1 and errp is set. | |
1866 | */ | |
1867 | static int run_process_child(const char *command[], Error **errp) | |
11d0f125 | 1868 | { |
8b020b5e DHB |
1869 | int exit_status, spawn_flag; |
1870 | GError *g_err = NULL; | |
1871 | bool success; | |
1872 | ||
1873 | spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | | |
1874 | G_SPAWN_STDERR_TO_DEV_NULL; | |
11d0f125 | 1875 | |
8b020b5e DHB |
1876 | success = g_spawn_sync(NULL, (char **)command, environ, spawn_flag, |
1877 | NULL, NULL, NULL, NULL, | |
1878 | &exit_status, &g_err); | |
304a0fcb | 1879 | |
8b020b5e DHB |
1880 | if (success) { |
1881 | return WEXITSTATUS(exit_status); | |
304a0fcb DHB |
1882 | } |
1883 | ||
8b020b5e DHB |
1884 | if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { |
1885 | error_setg(errp, "failed to create child process, error '%s'", | |
1886 | g_err->message); | |
a5fcf0e3 | 1887 | } |
11d0f125 | 1888 | |
8b020b5e DHB |
1889 | g_error_free(g_err); |
1890 | return -1; | |
1891 | } | |
1892 | ||
067927d6 DHB |
1893 | static bool systemd_supports_mode(SuspendMode mode, Error **errp) |
1894 | { | |
067927d6 DHB |
1895 | const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", |
1896 | "systemd-hybrid-sleep"}; | |
1897 | const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; | |
1898 | int status; | |
1899 | ||
992861fb | 1900 | status = run_process_child(cmd, errp); |
067927d6 DHB |
1901 | |
1902 | /* | |
1903 | * systemctl status uses LSB return codes so we can expect | |
1904 | * status > 0 and be ok. To assert if the guest has support | |
1905 | * for the selected suspend mode, status should be < 4. 4 is | |
1906 | * the code for unknown service status, the return value when | |
1907 | * the service does not exist. A common value is status = 3 | |
1908 | * (program is not running). | |
1909 | */ | |
1910 | if (status > 0 && status < 4) { | |
1911 | return true; | |
1912 | } | |
1913 | ||
067927d6 DHB |
1914 | return false; |
1915 | } | |
1916 | ||
1917 | static void systemd_suspend(SuspendMode mode, Error **errp) | |
1918 | { | |
1919 | Error *local_err = NULL; | |
1920 | const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; | |
1921 | const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; | |
1922 | int status; | |
1923 | ||
1924 | status = run_process_child(cmd, &local_err); | |
1925 | ||
1926 | if (status == 0) { | |
1927 | return; | |
1928 | } | |
1929 | ||
1930 | if ((status == -1) && !local_err) { | |
1931 | error_setg(errp, "the helper program 'systemctl %s' was not found", | |
1932 | systemctl_args[mode]); | |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | if (local_err) { | |
1937 | error_propagate(errp, local_err); | |
1938 | } else { | |
1939 | error_setg(errp, "the helper program 'systemctl %s' returned an " | |
1940 | "unexpected exit status code (%d)", | |
1941 | systemctl_args[mode], status); | |
1942 | } | |
1943 | } | |
1944 | ||
8b020b5e DHB |
1945 | static bool pmutils_supports_mode(SuspendMode mode, Error **errp) |
1946 | { | |
1947 | Error *local_err = NULL; | |
1948 | const char *pmutils_args[3] = {"--hibernate", "--suspend", | |
1949 | "--suspend-hybrid"}; | |
1950 | const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; | |
1951 | int status; | |
1952 | ||
1953 | status = run_process_child(cmd, &local_err); | |
1954 | ||
1955 | if (status == SUSPEND_SUPPORTED) { | |
1956 | return true; | |
11d0f125 LC |
1957 | } |
1958 | ||
8b020b5e DHB |
1959 | if ((status == -1) && !local_err) { |
1960 | return false; | |
6b26e837 | 1961 | } |
11d0f125 | 1962 | |
8b020b5e DHB |
1963 | if (local_err) { |
1964 | error_propagate(errp, local_err); | |
1965 | } else { | |
77dbc81b | 1966 | error_setg(errp, |
8b020b5e DHB |
1967 | "the helper program '%s' returned an unexpected exit" |
1968 | " status code (%d)", "pm-is-supported", status); | |
11d0f125 LC |
1969 | } |
1970 | ||
8b020b5e | 1971 | return false; |
a5fcf0e3 DHB |
1972 | } |
1973 | ||
8b020b5e | 1974 | static void pmutils_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
1975 | { |
1976 | Error *local_err = NULL; | |
8b020b5e DHB |
1977 | const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", |
1978 | "pm-suspend-hybrid"}; | |
1979 | const char *cmd[2] = {pmutils_binaries[mode], NULL}; | |
246d76eb DHB |
1980 | int status; |
1981 | ||
8b020b5e | 1982 | status = run_process_child(cmd, &local_err); |
246d76eb | 1983 | |
8b020b5e | 1984 | if (status == 0) { |
246d76eb DHB |
1985 | return; |
1986 | } | |
1987 | ||
8b020b5e DHB |
1988 | if ((status == -1) && !local_err) { |
1989 | error_setg(errp, "the helper program '%s' was not found", | |
1990 | pmutils_binaries[mode]); | |
1991 | return; | |
246d76eb DHB |
1992 | } |
1993 | ||
246d76eb DHB |
1994 | if (local_err) { |
1995 | error_propagate(errp, local_err); | |
8b020b5e | 1996 | } else { |
246d76eb | 1997 | error_setg(errp, |
8b020b5e DHB |
1998 | "the helper program '%s' returned an unexpected exit" |
1999 | " status code (%d)", pmutils_binaries[mode], status); | |
246d76eb | 2000 | } |
246d76eb DHB |
2001 | } |
2002 | ||
8b020b5e | 2003 | static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) |
a5fcf0e3 | 2004 | { |
8b020b5e DHB |
2005 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2006 | const char *sysfile_str = sysfile_strs[mode]; | |
a5fcf0e3 DHB |
2007 | char buf[32]; /* hopefully big enough */ |
2008 | int fd; | |
2009 | ssize_t ret; | |
2010 | ||
8b020b5e DHB |
2011 | if (!sysfile_str) { |
2012 | error_setg(errp, "unknown guest suspend mode"); | |
a5fcf0e3 DHB |
2013 | return false; |
2014 | } | |
2015 | ||
2016 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
2017 | if (fd < 0) { | |
2018 | return false; | |
2019 | } | |
2020 | ||
2021 | ret = read(fd, buf, sizeof(buf) - 1); | |
d9c745c1 | 2022 | close(fd); |
a5fcf0e3 DHB |
2023 | if (ret <= 0) { |
2024 | return false; | |
2025 | } | |
2026 | buf[ret] = '\0'; | |
2027 | ||
2028 | if (strstr(buf, sysfile_str)) { | |
2029 | return true; | |
2030 | } | |
2031 | return false; | |
2032 | } | |
2033 | ||
8b020b5e | 2034 | static void linux_sys_state_suspend(SuspendMode mode, Error **errp) |
11d0f125 | 2035 | { |
7b376087 | 2036 | Error *local_err = NULL; |
8b020b5e DHB |
2037 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2038 | const char *sysfile_str = sysfile_strs[mode]; | |
7b376087 | 2039 | pid_t pid; |
dc8764f0 | 2040 | int status; |
11d0f125 | 2041 | |
8b020b5e | 2042 | if (!sysfile_str) { |
304a0fcb DHB |
2043 | error_setg(errp, "unknown guest suspend mode"); |
2044 | return; | |
2045 | } | |
2046 | ||
11d0f125 | 2047 | pid = fork(); |
246d76eb | 2048 | if (!pid) { |
11d0f125 LC |
2049 | /* child */ |
2050 | int fd; | |
2051 | ||
2052 | setsid(); | |
2053 | reopen_fd_to_null(0); | |
2054 | reopen_fd_to_null(1); | |
2055 | reopen_fd_to_null(2); | |
2056 | ||
11d0f125 LC |
2057 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); |
2058 | if (fd < 0) { | |
2059 | _exit(EXIT_FAILURE); | |
2060 | } | |
2061 | ||
2062 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
2063 | _exit(EXIT_FAILURE); | |
2064 | } | |
2065 | ||
2066 | _exit(EXIT_SUCCESS); | |
7b376087 | 2067 | } else if (pid < 0) { |
77dbc81b | 2068 | error_setg_errno(errp, errno, "failed to create child process"); |
246d76eb | 2069 | return; |
11d0f125 LC |
2070 | } |
2071 | ||
7b376087 | 2072 | ga_wait_child(pid, &status, &local_err); |
84d18f06 | 2073 | if (local_err) { |
77dbc81b | 2074 | error_propagate(errp, local_err); |
246d76eb | 2075 | return; |
dc8764f0 LC |
2076 | } |
2077 | ||
7b376087 | 2078 | if (WEXITSTATUS(status)) { |
77dbc81b | 2079 | error_setg(errp, "child process has failed to suspend"); |
11d0f125 | 2080 | } |
dc8764f0 | 2081 | |
246d76eb DHB |
2082 | } |
2083 | ||
8b020b5e | 2084 | static void guest_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
2085 | { |
2086 | Error *local_err = NULL; | |
73e1d8eb | 2087 | bool mode_supported = false; |
246d76eb | 2088 | |
73e1d8eb DHB |
2089 | if (systemd_supports_mode(mode, &local_err)) { |
2090 | mode_supported = true; | |
2091 | systemd_suspend(mode, &local_err); | |
246d76eb DHB |
2092 | } |
2093 | ||
067927d6 DHB |
2094 | if (!local_err) { |
2095 | return; | |
2096 | } | |
2097 | ||
2098 | error_free(local_err); | |
6a4a3853 | 2099 | local_err = NULL; |
067927d6 | 2100 | |
73e1d8eb DHB |
2101 | if (pmutils_supports_mode(mode, &local_err)) { |
2102 | mode_supported = true; | |
2103 | pmutils_suspend(mode, &local_err); | |
2104 | } | |
2105 | ||
246d76eb DHB |
2106 | if (!local_err) { |
2107 | return; | |
2108 | } | |
2109 | ||
2110 | error_free(local_err); | |
6a4a3853 | 2111 | local_err = NULL; |
246d76eb | 2112 | |
73e1d8eb DHB |
2113 | if (linux_sys_state_supports_mode(mode, &local_err)) { |
2114 | mode_supported = true; | |
2115 | linux_sys_state_suspend(mode, &local_err); | |
2116 | } | |
2117 | ||
2118 | if (!mode_supported) { | |
6a4a3853 | 2119 | error_free(local_err); |
73e1d8eb DHB |
2120 | error_setg(errp, |
2121 | "the requested suspend mode is not supported by the guest"); | |
b2322003 | 2122 | } else { |
246d76eb DHB |
2123 | error_propagate(errp, local_err); |
2124 | } | |
11d0f125 LC |
2125 | } |
2126 | ||
77dbc81b | 2127 | void qmp_guest_suspend_disk(Error **errp) |
11d0f125 | 2128 | { |
304a0fcb | 2129 | guest_suspend(SUSPEND_MODE_DISK, errp); |
11d0f125 LC |
2130 | } |
2131 | ||
77dbc81b | 2132 | void qmp_guest_suspend_ram(Error **errp) |
fbf42210 | 2133 | { |
304a0fcb | 2134 | guest_suspend(SUSPEND_MODE_RAM, errp); |
fbf42210 LC |
2135 | } |
2136 | ||
77dbc81b | 2137 | void qmp_guest_suspend_hybrid(Error **errp) |
95f4f404 | 2138 | { |
304a0fcb | 2139 | guest_suspend(SUSPEND_MODE_HYBRID, errp); |
95f4f404 LC |
2140 | } |
2141 | ||
3424fc9f MP |
2142 | static GuestNetworkInterfaceList * |
2143 | guest_find_interface(GuestNetworkInterfaceList *head, | |
2144 | const char *name) | |
2145 | { | |
2146 | for (; head; head = head->next) { | |
2147 | if (strcmp(head->value->name, name) == 0) { | |
2148 | break; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | return head; | |
2153 | } | |
2154 | ||
53f9fcb2 ZL |
2155 | static int guest_get_network_stats(const char *name, |
2156 | GuestNetworkInterfaceStat *stats) | |
2157 | { | |
2158 | int name_len; | |
2159 | char const *devinfo = "/proc/net/dev"; | |
2160 | FILE *fp; | |
2161 | char *line = NULL, *colon; | |
2162 | size_t n = 0; | |
2163 | fp = fopen(devinfo, "r"); | |
2164 | if (!fp) { | |
2165 | return -1; | |
2166 | } | |
2167 | name_len = strlen(name); | |
2168 | while (getline(&line, &n, fp) != -1) { | |
2169 | long long dummy; | |
2170 | long long rx_bytes; | |
2171 | long long rx_packets; | |
2172 | long long rx_errs; | |
2173 | long long rx_dropped; | |
2174 | long long tx_bytes; | |
2175 | long long tx_packets; | |
2176 | long long tx_errs; | |
2177 | long long tx_dropped; | |
2178 | char *trim_line; | |
2179 | trim_line = g_strchug(line); | |
2180 | if (trim_line[0] == '\0') { | |
2181 | continue; | |
2182 | } | |
2183 | colon = strchr(trim_line, ':'); | |
2184 | if (!colon) { | |
2185 | continue; | |
2186 | } | |
2187 | if (colon - name_len == trim_line && | |
2188 | strncmp(trim_line, name, name_len) == 0) { | |
2189 | if (sscanf(colon + 1, | |
2190 | "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld", | |
2191 | &rx_bytes, &rx_packets, &rx_errs, &rx_dropped, | |
2192 | &dummy, &dummy, &dummy, &dummy, | |
2193 | &tx_bytes, &tx_packets, &tx_errs, &tx_dropped, | |
2194 | &dummy, &dummy, &dummy, &dummy) != 16) { | |
2195 | continue; | |
2196 | } | |
2197 | stats->rx_bytes = rx_bytes; | |
2198 | stats->rx_packets = rx_packets; | |
2199 | stats->rx_errs = rx_errs; | |
2200 | stats->rx_dropped = rx_dropped; | |
2201 | stats->tx_bytes = tx_bytes; | |
2202 | stats->tx_packets = tx_packets; | |
2203 | stats->tx_errs = tx_errs; | |
2204 | stats->tx_dropped = tx_dropped; | |
2205 | fclose(fp); | |
2206 | g_free(line); | |
2207 | return 0; | |
2208 | } | |
2209 | } | |
2210 | fclose(fp); | |
2211 | g_free(line); | |
2212 | g_debug("/proc/net/dev: Interface '%s' not found", name); | |
2213 | return -1; | |
2214 | } | |
2215 | ||
3424fc9f MP |
2216 | /* |
2217 | * Build information about guest interfaces | |
2218 | */ | |
2219 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
2220 | { | |
2221 | GuestNetworkInterfaceList *head = NULL, *cur_item = NULL; | |
2222 | struct ifaddrs *ifap, *ifa; | |
3424fc9f MP |
2223 | |
2224 | if (getifaddrs(&ifap) < 0) { | |
878a0ae0 | 2225 | error_setg_errno(errp, errno, "getifaddrs failed"); |
3424fc9f MP |
2226 | goto error; |
2227 | } | |
2228 | ||
2229 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
2230 | GuestNetworkInterfaceList *info; | |
2231 | GuestIpAddressList **address_list = NULL, *address_item = NULL; | |
53f9fcb2 | 2232 | GuestNetworkInterfaceStat *interface_stat = NULL; |
3424fc9f MP |
2233 | char addr4[INET_ADDRSTRLEN]; |
2234 | char addr6[INET6_ADDRSTRLEN]; | |
2235 | int sock; | |
2236 | struct ifreq ifr; | |
2237 | unsigned char *mac_addr; | |
2238 | void *p; | |
2239 | ||
2240 | g_debug("Processing %s interface", ifa->ifa_name); | |
2241 | ||
2242 | info = guest_find_interface(head, ifa->ifa_name); | |
2243 | ||
2244 | if (!info) { | |
2245 | info = g_malloc0(sizeof(*info)); | |
2246 | info->value = g_malloc0(sizeof(*info->value)); | |
2247 | info->value->name = g_strdup(ifa->ifa_name); | |
2248 | ||
2249 | if (!cur_item) { | |
2250 | head = cur_item = info; | |
2251 | } else { | |
2252 | cur_item->next = info; | |
2253 | cur_item = info; | |
2254 | } | |
2255 | } | |
2256 | ||
2257 | if (!info->value->has_hardware_address && | |
2258 | ifa->ifa_flags & SIOCGIFHWADDR) { | |
2259 | /* we haven't obtained HW address yet */ | |
2260 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
2261 | if (sock == -1) { | |
878a0ae0 | 2262 | error_setg_errno(errp, errno, "failed to create socket"); |
3424fc9f MP |
2263 | goto error; |
2264 | } | |
2265 | ||
2266 | memset(&ifr, 0, sizeof(ifr)); | |
1ab516ed | 2267 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name); |
3424fc9f | 2268 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { |
878a0ae0 LC |
2269 | error_setg_errno(errp, errno, |
2270 | "failed to get MAC address of %s", | |
2271 | ifa->ifa_name); | |
10a2158f | 2272 | close(sock); |
3424fc9f MP |
2273 | goto error; |
2274 | } | |
2275 | ||
10a2158f | 2276 | close(sock); |
3424fc9f MP |
2277 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; |
2278 | ||
e4ada482 SW |
2279 | info->value->hardware_address = |
2280 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", | |
2281 | (int) mac_addr[0], (int) mac_addr[1], | |
2282 | (int) mac_addr[2], (int) mac_addr[3], | |
2283 | (int) mac_addr[4], (int) mac_addr[5]); | |
3424fc9f MP |
2284 | |
2285 | info->value->has_hardware_address = true; | |
3424fc9f MP |
2286 | } |
2287 | ||
2288 | if (ifa->ifa_addr && | |
2289 | ifa->ifa_addr->sa_family == AF_INET) { | |
2290 | /* interface with IPv4 address */ | |
3424fc9f MP |
2291 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; |
2292 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
878a0ae0 | 2293 | error_setg_errno(errp, errno, "inet_ntop failed"); |
3424fc9f MP |
2294 | goto error; |
2295 | } | |
2296 | ||
10a2158f MA |
2297 | address_item = g_malloc0(sizeof(*address_item)); |
2298 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
3424fc9f MP |
2299 | address_item->value->ip_address = g_strdup(addr4); |
2300 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
2301 | ||
2302 | if (ifa->ifa_netmask) { | |
2303 | /* Count the number of set bits in netmask. | |
2304 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
2305 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
2306 | address_item->value->prefix = ctpop32(((uint32_t *) p)[0]); | |
2307 | } | |
2308 | } else if (ifa->ifa_addr && | |
2309 | ifa->ifa_addr->sa_family == AF_INET6) { | |
2310 | /* interface with IPv6 address */ | |
3424fc9f MP |
2311 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; |
2312 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
878a0ae0 | 2313 | error_setg_errno(errp, errno, "inet_ntop failed"); |
3424fc9f MP |
2314 | goto error; |
2315 | } | |
2316 | ||
10a2158f MA |
2317 | address_item = g_malloc0(sizeof(*address_item)); |
2318 | address_item->value = g_malloc0(sizeof(*address_item->value)); | |
3424fc9f MP |
2319 | address_item->value->ip_address = g_strdup(addr6); |
2320 | address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
2321 | ||
2322 | if (ifa->ifa_netmask) { | |
2323 | /* Count the number of set bits in netmask. | |
2324 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
2325 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
2326 | address_item->value->prefix = | |
2327 | ctpop32(((uint32_t *) p)[0]) + | |
2328 | ctpop32(((uint32_t *) p)[1]) + | |
2329 | ctpop32(((uint32_t *) p)[2]) + | |
2330 | ctpop32(((uint32_t *) p)[3]); | |
2331 | } | |
2332 | } | |
2333 | ||
2334 | if (!address_item) { | |
2335 | continue; | |
2336 | } | |
2337 | ||
2338 | address_list = &info->value->ip_addresses; | |
2339 | ||
2340 | while (*address_list && (*address_list)->next) { | |
2341 | address_list = &(*address_list)->next; | |
2342 | } | |
2343 | ||
2344 | if (!*address_list) { | |
2345 | *address_list = address_item; | |
2346 | } else { | |
2347 | (*address_list)->next = address_item; | |
2348 | } | |
2349 | ||
2350 | info->value->has_ip_addresses = true; | |
2351 | ||
53f9fcb2 ZL |
2352 | if (!info->value->has_statistics) { |
2353 | interface_stat = g_malloc0(sizeof(*interface_stat)); | |
2354 | if (guest_get_network_stats(info->value->name, | |
2355 | interface_stat) == -1) { | |
2356 | info->value->has_statistics = false; | |
2357 | g_free(interface_stat); | |
2358 | } else { | |
2359 | info->value->statistics = interface_stat; | |
2360 | info->value->has_statistics = true; | |
2361 | } | |
2362 | } | |
3424fc9f MP |
2363 | } |
2364 | ||
2365 | freeifaddrs(ifap); | |
2366 | return head; | |
2367 | ||
2368 | error: | |
2369 | freeifaddrs(ifap); | |
2370 | qapi_free_GuestNetworkInterfaceList(head); | |
2371 | return NULL; | |
2372 | } | |
2373 | ||
77dbc81b | 2374 | #define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp)) |
d2baff62 | 2375 | |
77dbc81b | 2376 | static long sysconf_exact(int name, const char *name_str, Error **errp) |
d2baff62 LE |
2377 | { |
2378 | long ret; | |
2379 | ||
2380 | errno = 0; | |
2381 | ret = sysconf(name); | |
2382 | if (ret == -1) { | |
2383 | if (errno == 0) { | |
77dbc81b | 2384 | error_setg(errp, "sysconf(%s): value indefinite", name_str); |
d2baff62 | 2385 | } else { |
77dbc81b | 2386 | error_setg_errno(errp, errno, "sysconf(%s)", name_str); |
d2baff62 LE |
2387 | } |
2388 | } | |
2389 | return ret; | |
2390 | } | |
2391 | ||
2392 | /* Transfer online/offline status between @vcpu and the guest system. | |
2393 | * | |
2394 | * On input either @errp or *@errp must be NULL. | |
2395 | * | |
2396 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: | |
2397 | * - R: vcpu->logical_id | |
2398 | * - W: vcpu->online | |
2399 | * - W: vcpu->can_offline | |
2400 | * | |
2401 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: | |
2402 | * - R: vcpu->logical_id | |
2403 | * - R: vcpu->online | |
2404 | * | |
2405 | * Written members remain unmodified on error. | |
2406 | */ | |
2407 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, | |
b4bf912a | 2408 | char *dirpath, Error **errp) |
d2baff62 | 2409 | { |
b4bf912a IM |
2410 | int fd; |
2411 | int res; | |
d2baff62 | 2412 | int dirfd; |
b4bf912a | 2413 | static const char fn[] = "online"; |
d2baff62 | 2414 | |
d2baff62 LE |
2415 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
2416 | if (dirfd == -1) { | |
2417 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
b4bf912a IM |
2418 | return; |
2419 | } | |
d2baff62 | 2420 | |
b4bf912a IM |
2421 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); |
2422 | if (fd == -1) { | |
2423 | if (errno != ENOENT) { | |
2424 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); | |
2425 | } else if (sys2vcpu) { | |
2426 | vcpu->online = true; | |
2427 | vcpu->can_offline = false; | |
2428 | } else if (!vcpu->online) { | |
2429 | error_setg(errp, "logical processor #%" PRId64 " can't be " | |
2430 | "offlined", vcpu->logical_id); | |
2431 | } /* otherwise pretend successful re-onlining */ | |
2432 | } else { | |
2433 | unsigned char status; | |
2434 | ||
2435 | res = pread(fd, &status, 1, 0); | |
2436 | if (res == -1) { | |
2437 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); | |
2438 | } else if (res == 0) { | |
2439 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, | |
2440 | fn); | |
2441 | } else if (sys2vcpu) { | |
2442 | vcpu->online = (status != '0'); | |
2443 | vcpu->can_offline = true; | |
2444 | } else if (vcpu->online != (status != '0')) { | |
2445 | status = '0' + vcpu->online; | |
2446 | if (pwrite(fd, &status, 1, 0) == -1) { | |
2447 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, | |
2448 | fn); | |
2449 | } | |
2450 | } /* otherwise pretend successful re-(on|off)-lining */ | |
d2baff62 | 2451 | |
b4bf912a | 2452 | res = close(fd); |
d2baff62 LE |
2453 | g_assert(res == 0); |
2454 | } | |
2455 | ||
b4bf912a IM |
2456 | res = close(dirfd); |
2457 | g_assert(res == 0); | |
d2baff62 LE |
2458 | } |
2459 | ||
2460 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2461 | { | |
2462 | int64_t current; | |
2463 | GuestLogicalProcessorList *head, **link; | |
2464 | long sc_max; | |
2465 | Error *local_err = NULL; | |
2466 | ||
2467 | current = 0; | |
2468 | head = NULL; | |
2469 | link = &head; | |
2470 | sc_max = SYSCONF_EXACT(_SC_NPROCESSORS_CONF, &local_err); | |
2471 | ||
2472 | while (local_err == NULL && current < sc_max) { | |
2473 | GuestLogicalProcessor *vcpu; | |
2474 | GuestLogicalProcessorList *entry; | |
b4bf912a IM |
2475 | int64_t id = current++; |
2476 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", | |
2477 | id); | |
2478 | ||
2479 | if (g_file_test(path, G_FILE_TEST_EXISTS)) { | |
2480 | vcpu = g_malloc0(sizeof *vcpu); | |
2481 | vcpu->logical_id = id; | |
2482 | vcpu->has_can_offline = true; /* lolspeak ftw */ | |
2483 | transfer_vcpu(vcpu, true, path, &local_err); | |
2484 | entry = g_malloc0(sizeof *entry); | |
2485 | entry->value = vcpu; | |
2486 | *link = entry; | |
2487 | link = &entry->next; | |
2488 | } | |
2489 | g_free(path); | |
d2baff62 LE |
2490 | } |
2491 | ||
2492 | if (local_err == NULL) { | |
2493 | /* there's no guest with zero VCPUs */ | |
2494 | g_assert(head != NULL); | |
2495 | return head; | |
2496 | } | |
2497 | ||
2498 | qapi_free_GuestLogicalProcessorList(head); | |
2499 | error_propagate(errp, local_err); | |
2500 | return NULL; | |
2501 | } | |
2502 | ||
cbb65fc2 LE |
2503 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
2504 | { | |
2505 | int64_t processed; | |
2506 | Error *local_err = NULL; | |
2507 | ||
2508 | processed = 0; | |
2509 | while (vcpus != NULL) { | |
b4bf912a IM |
2510 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", |
2511 | vcpus->value->logical_id); | |
2512 | ||
2513 | transfer_vcpu(vcpus->value, false, path, &local_err); | |
2514 | g_free(path); | |
cbb65fc2 LE |
2515 | if (local_err != NULL) { |
2516 | break; | |
2517 | } | |
2518 | ++processed; | |
2519 | vcpus = vcpus->next; | |
2520 | } | |
2521 | ||
2522 | if (local_err != NULL) { | |
2523 | if (processed == 0) { | |
2524 | error_propagate(errp, local_err); | |
2525 | } else { | |
2526 | error_free(local_err); | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | return processed; | |
2531 | } | |
2532 | ||
215a2771 DB |
2533 | void qmp_guest_set_user_password(const char *username, |
2534 | const char *password, | |
2535 | bool crypted, | |
2536 | Error **errp) | |
2537 | { | |
2538 | Error *local_err = NULL; | |
2539 | char *passwd_path = NULL; | |
2540 | pid_t pid; | |
2541 | int status; | |
2542 | int datafd[2] = { -1, -1 }; | |
2543 | char *rawpasswddata = NULL; | |
2544 | size_t rawpasswdlen; | |
2545 | char *chpasswddata = NULL; | |
2546 | size_t chpasswdlen; | |
2547 | ||
920639ca DB |
2548 | rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); |
2549 | if (!rawpasswddata) { | |
2550 | return; | |
2551 | } | |
215a2771 DB |
2552 | rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); |
2553 | rawpasswddata[rawpasswdlen] = '\0'; | |
2554 | ||
2555 | if (strchr(rawpasswddata, '\n')) { | |
2556 | error_setg(errp, "forbidden characters in raw password"); | |
2557 | goto out; | |
2558 | } | |
2559 | ||
2560 | if (strchr(username, '\n') || | |
2561 | strchr(username, ':')) { | |
2562 | error_setg(errp, "forbidden characters in username"); | |
2563 | goto out; | |
2564 | } | |
2565 | ||
2566 | chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); | |
2567 | chpasswdlen = strlen(chpasswddata); | |
2568 | ||
2569 | passwd_path = g_find_program_in_path("chpasswd"); | |
2570 | ||
2571 | if (!passwd_path) { | |
2572 | error_setg(errp, "cannot find 'passwd' program in PATH"); | |
2573 | goto out; | |
2574 | } | |
2575 | ||
2576 | if (pipe(datafd) < 0) { | |
2577 | error_setg(errp, "cannot create pipe FDs"); | |
2578 | goto out; | |
2579 | } | |
2580 | ||
2581 | pid = fork(); | |
2582 | if (pid == 0) { | |
2583 | close(datafd[1]); | |
2584 | /* child */ | |
2585 | setsid(); | |
2586 | dup2(datafd[0], 0); | |
2587 | reopen_fd_to_null(1); | |
2588 | reopen_fd_to_null(2); | |
2589 | ||
2590 | if (crypted) { | |
2591 | execle(passwd_path, "chpasswd", "-e", NULL, environ); | |
2592 | } else { | |
2593 | execle(passwd_path, "chpasswd", NULL, environ); | |
2594 | } | |
2595 | _exit(EXIT_FAILURE); | |
2596 | } else if (pid < 0) { | |
2597 | error_setg_errno(errp, errno, "failed to create child process"); | |
2598 | goto out; | |
2599 | } | |
2600 | close(datafd[0]); | |
2601 | datafd[0] = -1; | |
2602 | ||
2603 | if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { | |
2604 | error_setg_errno(errp, errno, "cannot write new account password"); | |
2605 | goto out; | |
2606 | } | |
2607 | close(datafd[1]); | |
2608 | datafd[1] = -1; | |
2609 | ||
2610 | ga_wait_child(pid, &status, &local_err); | |
2611 | if (local_err) { | |
2612 | error_propagate(errp, local_err); | |
2613 | goto out; | |
2614 | } | |
2615 | ||
2616 | if (!WIFEXITED(status)) { | |
2617 | error_setg(errp, "child process has terminated abnormally"); | |
2618 | goto out; | |
2619 | } | |
2620 | ||
2621 | if (WEXITSTATUS(status)) { | |
2622 | error_setg(errp, "child process has failed to set user password"); | |
2623 | goto out; | |
2624 | } | |
2625 | ||
2626 | out: | |
2627 | g_free(chpasswddata); | |
2628 | g_free(rawpasswddata); | |
2629 | g_free(passwd_path); | |
2630 | if (datafd[0] != -1) { | |
2631 | close(datafd[0]); | |
2632 | } | |
2633 | if (datafd[1] != -1) { | |
2634 | close(datafd[1]); | |
2635 | } | |
2636 | } | |
2637 | ||
bd240fca HZ |
2638 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, |
2639 | int size, Error **errp) | |
2640 | { | |
2641 | int fd; | |
2642 | int res; | |
2643 | ||
2644 | errno = 0; | |
2645 | fd = openat(dirfd, pathname, O_RDONLY); | |
2646 | if (fd == -1) { | |
2647 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2648 | return; | |
2649 | } | |
2650 | ||
2651 | res = pread(fd, buf, size, 0); | |
2652 | if (res == -1) { | |
2653 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); | |
2654 | } else if (res == 0) { | |
2655 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); | |
2656 | } | |
2657 | close(fd); | |
2658 | } | |
2659 | ||
2660 | static void ga_write_sysfs_file(int dirfd, const char *pathname, | |
2661 | const char *buf, int size, Error **errp) | |
2662 | { | |
2663 | int fd; | |
2664 | ||
2665 | errno = 0; | |
2666 | fd = openat(dirfd, pathname, O_WRONLY); | |
2667 | if (fd == -1) { | |
2668 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2669 | return; | |
2670 | } | |
2671 | ||
2672 | if (pwrite(fd, buf, size, 0) == -1) { | |
2673 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); | |
2674 | } | |
2675 | ||
2676 | close(fd); | |
2677 | } | |
2678 | ||
2679 | /* Transfer online/offline status between @mem_blk and the guest system. | |
2680 | * | |
2681 | * On input either @errp or *@errp must be NULL. | |
2682 | * | |
2683 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: | |
2684 | * - R: mem_blk->phys_index | |
2685 | * - W: mem_blk->online | |
2686 | * - W: mem_blk->can_offline | |
2687 | * | |
2688 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: | |
2689 | * - R: mem_blk->phys_index | |
2690 | * - R: mem_blk->online | |
2691 | *- R: mem_blk->can_offline | |
2692 | * Written members remain unmodified on error. | |
2693 | */ | |
2694 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, | |
2695 | GuestMemoryBlockResponse *result, | |
2696 | Error **errp) | |
2697 | { | |
2698 | char *dirpath; | |
2699 | int dirfd; | |
2700 | char *status; | |
2701 | Error *local_err = NULL; | |
2702 | ||
2703 | if (!sys2memblk) { | |
2704 | DIR *dp; | |
2705 | ||
2706 | if (!result) { | |
2707 | error_setg(errp, "Internal error, 'result' should not be NULL"); | |
2708 | return; | |
2709 | } | |
2710 | errno = 0; | |
2711 | dp = opendir("/sys/devices/system/memory/"); | |
2712 | /* if there is no 'memory' directory in sysfs, | |
2713 | * we think this VM does not support online/offline memory block, | |
2714 | * any other solution? | |
2715 | */ | |
9879f5ac PMD |
2716 | if (!dp) { |
2717 | if (errno == ENOENT) { | |
2718 | result->response = | |
2719 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2720 | } | |
bd240fca HZ |
2721 | goto out1; |
2722 | } | |
2723 | closedir(dp); | |
2724 | } | |
2725 | ||
2726 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", | |
2727 | mem_blk->phys_index); | |
2728 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2729 | if (dirfd == -1) { | |
2730 | if (sys2memblk) { | |
2731 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2732 | } else { | |
2733 | if (errno == ENOENT) { | |
2734 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; | |
2735 | } else { | |
2736 | result->response = | |
2737 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2738 | } | |
2739 | } | |
2740 | g_free(dirpath); | |
2741 | goto out1; | |
2742 | } | |
2743 | g_free(dirpath); | |
2744 | ||
2745 | status = g_malloc0(10); | |
2746 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); | |
2747 | if (local_err) { | |
2748 | /* treat with sysfs file that not exist in old kernel */ | |
2749 | if (errno == ENOENT) { | |
2750 | error_free(local_err); | |
2751 | if (sys2memblk) { | |
2752 | mem_blk->online = true; | |
2753 | mem_blk->can_offline = false; | |
2754 | } else if (!mem_blk->online) { | |
2755 | result->response = | |
2756 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2757 | } | |
2758 | } else { | |
2759 | if (sys2memblk) { | |
2760 | error_propagate(errp, local_err); | |
2761 | } else { | |
b368123d | 2762 | error_free(local_err); |
bd240fca HZ |
2763 | result->response = |
2764 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2765 | } | |
2766 | } | |
2767 | goto out2; | |
2768 | } | |
2769 | ||
2770 | if (sys2memblk) { | |
2771 | char removable = '0'; | |
2772 | ||
2773 | mem_blk->online = (strncmp(status, "online", 6) == 0); | |
2774 | ||
2775 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); | |
2776 | if (local_err) { | |
67cc32eb | 2777 | /* if no 'removable' file, it doesn't support offline mem blk */ |
bd240fca HZ |
2778 | if (errno == ENOENT) { |
2779 | error_free(local_err); | |
2780 | mem_blk->can_offline = false; | |
2781 | } else { | |
2782 | error_propagate(errp, local_err); | |
2783 | } | |
2784 | } else { | |
2785 | mem_blk->can_offline = (removable != '0'); | |
2786 | } | |
2787 | } else { | |
2788 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { | |
7064024d | 2789 | const char *new_state = mem_blk->online ? "online" : "offline"; |
bd240fca HZ |
2790 | |
2791 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), | |
2792 | &local_err); | |
bd240fca HZ |
2793 | if (local_err) { |
2794 | error_free(local_err); | |
2795 | result->response = | |
2796 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2797 | goto out2; | |
2798 | } | |
2799 | ||
2800 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; | |
2801 | result->has_error_code = false; | |
2802 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2803 | } | |
2804 | g_free(status); | |
2805 | close(dirfd); | |
2806 | return; | |
2807 | ||
2808 | out2: | |
2809 | g_free(status); | |
2810 | close(dirfd); | |
2811 | out1: | |
2812 | if (!sys2memblk) { | |
2813 | result->has_error_code = true; | |
2814 | result->error_code = errno; | |
2815 | } | |
2816 | } | |
2817 | ||
a065aaa9 HZ |
2818 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
2819 | { | |
bd240fca HZ |
2820 | GuestMemoryBlockList *head, **link; |
2821 | Error *local_err = NULL; | |
2822 | struct dirent *de; | |
2823 | DIR *dp; | |
2824 | ||
2825 | head = NULL; | |
2826 | link = &head; | |
2827 | ||
2828 | dp = opendir("/sys/devices/system/memory/"); | |
2829 | if (!dp) { | |
f693fe6e MR |
2830 | /* it's ok if this happens to be a system that doesn't expose |
2831 | * memory blocks via sysfs, but otherwise we should report | |
2832 | * an error | |
2833 | */ | |
2834 | if (errno != ENOENT) { | |
2835 | error_setg_errno(errp, errno, "Can't open directory" | |
9af9e0fe | 2836 | "\"/sys/devices/system/memory/\""); |
f693fe6e | 2837 | } |
bd240fca HZ |
2838 | return NULL; |
2839 | } | |
2840 | ||
2841 | /* Note: the phys_index of memory block may be discontinuous, | |
2842 | * this is because a memblk is the unit of the Sparse Memory design, which | |
2843 | * allows discontinuous memory ranges (ex. NUMA), so here we should | |
2844 | * traverse the memory block directory. | |
2845 | */ | |
2846 | while ((de = readdir(dp)) != NULL) { | |
2847 | GuestMemoryBlock *mem_blk; | |
2848 | GuestMemoryBlockList *entry; | |
2849 | ||
2850 | if ((strncmp(de->d_name, "memory", 6) != 0) || | |
2851 | !(de->d_type & DT_DIR)) { | |
2852 | continue; | |
2853 | } | |
2854 | ||
2855 | mem_blk = g_malloc0(sizeof *mem_blk); | |
2856 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ | |
2857 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); | |
2858 | mem_blk->has_can_offline = true; /* lolspeak ftw */ | |
2859 | transfer_memory_block(mem_blk, true, NULL, &local_err); | |
4155c998 MA |
2860 | if (local_err) { |
2861 | break; | |
2862 | } | |
bd240fca HZ |
2863 | |
2864 | entry = g_malloc0(sizeof *entry); | |
2865 | entry->value = mem_blk; | |
2866 | ||
2867 | *link = entry; | |
2868 | link = &entry->next; | |
2869 | } | |
2870 | ||
2871 | closedir(dp); | |
2872 | if (local_err == NULL) { | |
2873 | /* there's no guest with zero memory blocks */ | |
2874 | if (head == NULL) { | |
2875 | error_setg(errp, "guest reported zero memory blocks!"); | |
2876 | } | |
2877 | return head; | |
2878 | } | |
2879 | ||
2880 | qapi_free_GuestMemoryBlockList(head); | |
2881 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2882 | return NULL; |
2883 | } | |
2884 | ||
2885 | GuestMemoryBlockResponseList * | |
2886 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2887 | { | |
32ca7927 HZ |
2888 | GuestMemoryBlockResponseList *head, **link; |
2889 | Error *local_err = NULL; | |
2890 | ||
2891 | head = NULL; | |
2892 | link = &head; | |
2893 | ||
2894 | while (mem_blks != NULL) { | |
2895 | GuestMemoryBlockResponse *result; | |
2896 | GuestMemoryBlockResponseList *entry; | |
2897 | GuestMemoryBlock *current_mem_blk = mem_blks->value; | |
2898 | ||
2899 | result = g_malloc0(sizeof(*result)); | |
2900 | result->phys_index = current_mem_blk->phys_index; | |
2901 | transfer_memory_block(current_mem_blk, false, result, &local_err); | |
2902 | if (local_err) { /* should never happen */ | |
2903 | goto err; | |
2904 | } | |
2905 | entry = g_malloc0(sizeof *entry); | |
2906 | entry->value = result; | |
2907 | ||
2908 | *link = entry; | |
2909 | link = &entry->next; | |
2910 | mem_blks = mem_blks->next; | |
2911 | } | |
2912 | ||
2913 | return head; | |
2914 | err: | |
2915 | qapi_free_GuestMemoryBlockResponseList(head); | |
2916 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2917 | return NULL; |
2918 | } | |
2919 | ||
2920 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2921 | { | |
ef82b60b HZ |
2922 | Error *local_err = NULL; |
2923 | char *dirpath; | |
2924 | int dirfd; | |
2925 | char *buf; | |
2926 | GuestMemoryBlockInfo *info; | |
2927 | ||
2928 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); | |
2929 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2930 | if (dirfd == -1) { | |
2931 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2932 | g_free(dirpath); | |
2933 | return NULL; | |
2934 | } | |
2935 | g_free(dirpath); | |
2936 | ||
2937 | buf = g_malloc0(20); | |
2938 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); | |
8ce1ee46 | 2939 | close(dirfd); |
ef82b60b HZ |
2940 | if (local_err) { |
2941 | g_free(buf); | |
2942 | error_propagate(errp, local_err); | |
2943 | return NULL; | |
2944 | } | |
2945 | ||
2946 | info = g_new0(GuestMemoryBlockInfo, 1); | |
2947 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ | |
2948 | ||
2949 | g_free(buf); | |
2950 | ||
2951 | return info; | |
a065aaa9 HZ |
2952 | } |
2953 | ||
e72c3f2e MR |
2954 | #else /* defined(__linux__) */ |
2955 | ||
77dbc81b | 2956 | void qmp_guest_suspend_disk(Error **errp) |
e72c3f2e | 2957 | { |
c6bd8c70 | 2958 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2959 | } |
2960 | ||
77dbc81b | 2961 | void qmp_guest_suspend_ram(Error **errp) |
e72c3f2e | 2962 | { |
c6bd8c70 | 2963 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2964 | } |
2965 | ||
77dbc81b | 2966 | void qmp_guest_suspend_hybrid(Error **errp) |
e72c3f2e | 2967 | { |
c6bd8c70 | 2968 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2969 | } |
2970 | ||
d35d4cb5 | 2971 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
e72c3f2e | 2972 | { |
c6bd8c70 | 2973 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 | 2974 | return NULL; |
e72c3f2e MR |
2975 | } |
2976 | ||
d2baff62 LE |
2977 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
2978 | { | |
c6bd8c70 | 2979 | error_setg(errp, QERR_UNSUPPORTED); |
d2baff62 LE |
2980 | return NULL; |
2981 | } | |
2982 | ||
cbb65fc2 LE |
2983 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
2984 | { | |
c6bd8c70 | 2985 | error_setg(errp, QERR_UNSUPPORTED); |
cbb65fc2 LE |
2986 | return -1; |
2987 | } | |
2988 | ||
215a2771 DB |
2989 | void qmp_guest_set_user_password(const char *username, |
2990 | const char *password, | |
2991 | bool crypted, | |
2992 | Error **errp) | |
2993 | { | |
c6bd8c70 | 2994 | error_setg(errp, QERR_UNSUPPORTED); |
215a2771 DB |
2995 | } |
2996 | ||
a065aaa9 HZ |
2997 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
2998 | { | |
c6bd8c70 | 2999 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3000 | return NULL; |
3001 | } | |
3002 | ||
3003 | GuestMemoryBlockResponseList * | |
3004 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
3005 | { | |
c6bd8c70 | 3006 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3007 | return NULL; |
3008 | } | |
3009 | ||
3010 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
3011 | { | |
c6bd8c70 | 3012 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3013 | return NULL; |
3014 | } | |
3015 | ||
d35d4cb5 MR |
3016 | #endif |
3017 | ||
3018 | #if !defined(CONFIG_FSFREEZE) | |
3019 | ||
46d4c572 TS |
3020 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) |
3021 | { | |
c6bd8c70 | 3022 | error_setg(errp, QERR_UNSUPPORTED); |
46d4c572 TS |
3023 | return NULL; |
3024 | } | |
3025 | ||
77dbc81b | 3026 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e72c3f2e | 3027 | { |
c6bd8c70 | 3028 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3029 | |
3030 | return 0; | |
e72c3f2e MR |
3031 | } |
3032 | ||
77dbc81b | 3033 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
e72c3f2e | 3034 | { |
c6bd8c70 | 3035 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3036 | |
3037 | return 0; | |
e72c3f2e MR |
3038 | } |
3039 | ||
e99bce20 TS |
3040 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
3041 | strList *mountpoints, | |
3042 | Error **errp) | |
3043 | { | |
c6bd8c70 | 3044 | error_setg(errp, QERR_UNSUPPORTED); |
e99bce20 TS |
3045 | |
3046 | return 0; | |
3047 | } | |
3048 | ||
77dbc81b | 3049 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e72c3f2e | 3050 | { |
c6bd8c70 | 3051 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3052 | |
3053 | return 0; | |
e72c3f2e | 3054 | } |
fed39564 TG |
3055 | |
3056 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
3057 | { | |
3058 | error_setg(errp, QERR_UNSUPPORTED); | |
3059 | return NULL; | |
3060 | } | |
3061 | ||
eab5fd59 PB |
3062 | #endif /* CONFIG_FSFREEZE */ |
3063 | ||
3064 | #if !defined(CONFIG_FSTRIM) | |
e82855d9 JO |
3065 | GuestFilesystemTrimResponse * |
3066 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 3067 | { |
c6bd8c70 | 3068 | error_setg(errp, QERR_UNSUPPORTED); |
e82855d9 | 3069 | return NULL; |
eab5fd59 | 3070 | } |
e72c3f2e MR |
3071 | #endif |
3072 | ||
1281c08a TS |
3073 | /* add unsupported commands to the blacklist */ |
3074 | GList *ga_command_blacklist_init(GList *blacklist) | |
3075 | { | |
3076 | #if !defined(__linux__) | |
3077 | { | |
3078 | const char *list[] = { | |
3079 | "guest-suspend-disk", "guest-suspend-ram", | |
3080 | "guest-suspend-hybrid", "guest-network-get-interfaces", | |
0dd38a03 HZ |
3081 | "guest-get-vcpus", "guest-set-vcpus", |
3082 | "guest-get-memory-blocks", "guest-set-memory-blocks", | |
28d8dd35 BS |
3083 | "guest-get-memory-block-size", "guest-get-memory-block-info", |
3084 | NULL}; | |
1281c08a TS |
3085 | char **p = (char **)list; |
3086 | ||
3087 | while (*p) { | |
4bca81ce | 3088 | blacklist = g_list_append(blacklist, g_strdup(*p++)); |
1281c08a TS |
3089 | } |
3090 | } | |
3091 | #endif | |
3092 | ||
3093 | #if !defined(CONFIG_FSFREEZE) | |
3094 | { | |
3095 | const char *list[] = { | |
3096 | "guest-get-fsinfo", "guest-fsfreeze-status", | |
3097 | "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", | |
fed39564 TG |
3098 | "guest-fsfreeze-thaw", "guest-get-fsinfo", |
3099 | "guest-get-disks", NULL}; | |
1281c08a TS |
3100 | char **p = (char **)list; |
3101 | ||
3102 | while (*p) { | |
4bca81ce | 3103 | blacklist = g_list_append(blacklist, g_strdup(*p++)); |
1281c08a TS |
3104 | } |
3105 | } | |
3106 | #endif | |
3107 | ||
3108 | #if !defined(CONFIG_FSTRIM) | |
4bca81ce | 3109 | blacklist = g_list_append(blacklist, g_strdup("guest-fstrim")); |
1281c08a TS |
3110 | #endif |
3111 | ||
2e4211ce TG |
3112 | blacklist = g_list_append(blacklist, g_strdup("guest-get-devices")); |
3113 | ||
1281c08a TS |
3114 | return blacklist; |
3115 | } | |
3116 | ||
e3d4d252 MR |
3117 | /* register init/cleanup routines for stateful command groups */ |
3118 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
3119 | { | |
7006b9cf | 3120 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 3121 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 3122 | #endif |
e3d4d252 | 3123 | } |
161a56a9 | 3124 | |
e674605f TG |
3125 | #ifdef HAVE_UTMPX |
3126 | ||
161a56a9 VF |
3127 | #define QGA_MICRO_SECOND_TO_SECOND 1000000 |
3128 | ||
3129 | static double ga_get_login_time(struct utmpx *user_info) | |
3130 | { | |
3131 | double seconds = (double)user_info->ut_tv.tv_sec; | |
3132 | double useconds = (double)user_info->ut_tv.tv_usec; | |
3133 | useconds /= QGA_MICRO_SECOND_TO_SECOND; | |
3134 | return seconds + useconds; | |
3135 | } | |
3136 | ||
b90abbac | 3137 | GuestUserList *qmp_guest_get_users(Error **errp) |
161a56a9 VF |
3138 | { |
3139 | GHashTable *cache = NULL; | |
3140 | GuestUserList *head = NULL, *cur_item = NULL; | |
3141 | struct utmpx *user_info = NULL; | |
3142 | gpointer value = NULL; | |
3143 | GuestUser *user = NULL; | |
3144 | GuestUserList *item = NULL; | |
3145 | double login_time = 0; | |
3146 | ||
3147 | cache = g_hash_table_new(g_str_hash, g_str_equal); | |
3148 | setutxent(); | |
3149 | ||
3150 | for (;;) { | |
3151 | user_info = getutxent(); | |
3152 | if (user_info == NULL) { | |
3153 | break; | |
3154 | } else if (user_info->ut_type != USER_PROCESS) { | |
3155 | continue; | |
3156 | } else if (g_hash_table_contains(cache, user_info->ut_user)) { | |
3157 | value = g_hash_table_lookup(cache, user_info->ut_user); | |
3158 | user = (GuestUser *)value; | |
3159 | login_time = ga_get_login_time(user_info); | |
3160 | /* We're ensuring the earliest login time to be sent */ | |
3161 | if (login_time < user->login_time) { | |
3162 | user->login_time = login_time; | |
3163 | } | |
3164 | continue; | |
3165 | } | |
3166 | ||
3167 | item = g_new0(GuestUserList, 1); | |
3168 | item->value = g_new0(GuestUser, 1); | |
3169 | item->value->user = g_strdup(user_info->ut_user); | |
3170 | item->value->login_time = ga_get_login_time(user_info); | |
3171 | ||
3172 | g_hash_table_insert(cache, item->value->user, item->value); | |
3173 | ||
3174 | if (!cur_item) { | |
3175 | head = cur_item = item; | |
3176 | } else { | |
3177 | cur_item->next = item; | |
3178 | cur_item = item; | |
3179 | } | |
3180 | } | |
3181 | endutxent(); | |
3182 | g_hash_table_destroy(cache); | |
3183 | return head; | |
3184 | } | |
e674605f TG |
3185 | |
3186 | #else | |
3187 | ||
3188 | GuestUserList *qmp_guest_get_users(Error **errp) | |
3189 | { | |
3190 | error_setg(errp, QERR_UNSUPPORTED); | |
3191 | return NULL; | |
3192 | } | |
3193 | ||
3194 | #endif | |
9848f797 TG |
3195 | |
3196 | /* Replace escaped special characters with theire real values. The replacement | |
3197 | * is done in place -- returned value is in the original string. | |
3198 | */ | |
3199 | static void ga_osrelease_replace_special(gchar *value) | |
3200 | { | |
3201 | gchar *p, *p2, quote; | |
3202 | ||
3203 | /* Trim the string at first space or semicolon if it is not enclosed in | |
3204 | * single or double quotes. */ | |
3205 | if ((value[0] != '"') || (value[0] == '\'')) { | |
3206 | p = strchr(value, ' '); | |
3207 | if (p != NULL) { | |
3208 | *p = 0; | |
3209 | } | |
3210 | p = strchr(value, ';'); | |
3211 | if (p != NULL) { | |
3212 | *p = 0; | |
3213 | } | |
3214 | return; | |
3215 | } | |
3216 | ||
3217 | quote = value[0]; | |
3218 | p2 = value; | |
3219 | p = value + 1; | |
3220 | while (*p != 0) { | |
3221 | if (*p == '\\') { | |
3222 | p++; | |
3223 | switch (*p) { | |
3224 | case '$': | |
3225 | case '\'': | |
3226 | case '"': | |
3227 | case '\\': | |
3228 | case '`': | |
3229 | break; | |
3230 | default: | |
3231 | /* Keep literal backslash followed by whatever is there */ | |
3232 | p--; | |
3233 | break; | |
3234 | } | |
3235 | } else if (*p == quote) { | |
3236 | *p2 = 0; | |
3237 | break; | |
3238 | } | |
3239 | *(p2++) = *(p++); | |
3240 | } | |
3241 | } | |
3242 | ||
3243 | static GKeyFile *ga_parse_osrelease(const char *fname) | |
3244 | { | |
3245 | gchar *content = NULL; | |
3246 | gchar *content2 = NULL; | |
3247 | GError *err = NULL; | |
3248 | GKeyFile *keys = g_key_file_new(); | |
3249 | const char *group = "[os-release]\n"; | |
3250 | ||
3251 | if (!g_file_get_contents(fname, &content, NULL, &err)) { | |
3252 | slog("failed to read '%s', error: %s", fname, err->message); | |
3253 | goto fail; | |
3254 | } | |
3255 | ||
3256 | if (!g_utf8_validate(content, -1, NULL)) { | |
3257 | slog("file is not utf-8 encoded: %s", fname); | |
3258 | goto fail; | |
3259 | } | |
3260 | content2 = g_strdup_printf("%s%s", group, content); | |
3261 | ||
3262 | if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE, | |
3263 | &err)) { | |
3264 | slog("failed to parse file '%s', error: %s", fname, err->message); | |
3265 | goto fail; | |
3266 | } | |
3267 | ||
3268 | g_free(content); | |
3269 | g_free(content2); | |
3270 | return keys; | |
3271 | ||
3272 | fail: | |
3273 | g_error_free(err); | |
3274 | g_free(content); | |
3275 | g_free(content2); | |
3276 | g_key_file_free(keys); | |
3277 | return NULL; | |
3278 | } | |
3279 | ||
3280 | GuestOSInfo *qmp_guest_get_osinfo(Error **errp) | |
3281 | { | |
3282 | GuestOSInfo *info = NULL; | |
3283 | struct utsname kinfo; | |
339ca68b TG |
3284 | GKeyFile *osrelease = NULL; |
3285 | const char *qga_os_release = g_getenv("QGA_OS_RELEASE"); | |
9848f797 TG |
3286 | |
3287 | info = g_new0(GuestOSInfo, 1); | |
3288 | ||
3289 | if (uname(&kinfo) != 0) { | |
3290 | error_setg_errno(errp, errno, "uname failed"); | |
3291 | } else { | |
3292 | info->has_kernel_version = true; | |
3293 | info->kernel_version = g_strdup(kinfo.version); | |
3294 | info->has_kernel_release = true; | |
3295 | info->kernel_release = g_strdup(kinfo.release); | |
3296 | info->has_machine = true; | |
3297 | info->machine = g_strdup(kinfo.machine); | |
3298 | } | |
3299 | ||
339ca68b TG |
3300 | if (qga_os_release != NULL) { |
3301 | osrelease = ga_parse_osrelease(qga_os_release); | |
3302 | } else { | |
3303 | osrelease = ga_parse_osrelease("/etc/os-release"); | |
3304 | if (osrelease == NULL) { | |
3305 | osrelease = ga_parse_osrelease("/usr/lib/os-release"); | |
3306 | } | |
9848f797 TG |
3307 | } |
3308 | ||
3309 | if (osrelease != NULL) { | |
3310 | char *value; | |
3311 | ||
3312 | #define GET_FIELD(field, osfield) do { \ | |
3313 | value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \ | |
3314 | if (value != NULL) { \ | |
3315 | ga_osrelease_replace_special(value); \ | |
3316 | info->has_ ## field = true; \ | |
3317 | info->field = value; \ | |
3318 | } \ | |
3319 | } while (0) | |
3320 | GET_FIELD(id, "ID"); | |
3321 | GET_FIELD(name, "NAME"); | |
3322 | GET_FIELD(pretty_name, "PRETTY_NAME"); | |
3323 | GET_FIELD(version, "VERSION"); | |
3324 | GET_FIELD(version_id, "VERSION_ID"); | |
3325 | GET_FIELD(variant, "VARIANT"); | |
3326 | GET_FIELD(variant_id, "VARIANT_ID"); | |
3327 | #undef GET_FIELD | |
3328 | ||
3329 | g_key_file_free(osrelease); | |
3330 | } | |
3331 | ||
3332 | return info; | |
3333 | } | |
2e4211ce TG |
3334 | |
3335 | GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) | |
3336 | { | |
3337 | error_setg(errp, QERR_UNSUPPORTED); | |
3338 | ||
3339 | return NULL; | |
3340 | } |