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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", |
0697e9ed | 113 | "hypervisor initiated shutdown", (char *)NULL, environ); |
3674838c | 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 | ||
2c958923 | 139 | void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) |
a1bca57f LL |
140 | { |
141 | int ret; | |
142 | int status; | |
143 | pid_t pid; | |
144 | Error *local_err = NULL; | |
145 | struct timeval tv; | |
5c6096e5 CH |
146 | static const char hwclock_path[] = "/sbin/hwclock"; |
147 | static int hwclock_available = -1; | |
148 | ||
149 | if (hwclock_available < 0) { | |
150 | hwclock_available = (access(hwclock_path, X_OK) == 0); | |
151 | } | |
152 | ||
153 | if (!hwclock_available) { | |
154 | error_setg(errp, QERR_UNSUPPORTED); | |
155 | return; | |
156 | } | |
a1bca57f | 157 | |
2c958923 MP |
158 | /* If user has passed a time, validate and set it. */ |
159 | if (has_time) { | |
00d2f370 MAL |
160 | GDate date = { 0, }; |
161 | ||
2c958923 MP |
162 | /* year-2038 will overflow in case time_t is 32bit */ |
163 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { | |
164 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); | |
165 | return; | |
166 | } | |
167 | ||
168 | tv.tv_sec = time_ns / 1000000000; | |
169 | tv.tv_usec = (time_ns % 1000000000) / 1000; | |
00d2f370 MAL |
170 | g_date_set_time_t(&date, tv.tv_sec); |
171 | if (date.year < 1970 || date.year >= 2070) { | |
172 | error_setg_errno(errp, errno, "Invalid time"); | |
173 | return; | |
174 | } | |
2c958923 MP |
175 | |
176 | ret = settimeofday(&tv, NULL); | |
177 | if (ret < 0) { | |
178 | error_setg_errno(errp, errno, "Failed to set time to guest"); | |
179 | return; | |
180 | } | |
a1bca57f LL |
181 | } |
182 | ||
2c958923 MP |
183 | /* Now, if user has passed a time to set and the system time is set, we |
184 | * just need to synchronize the hardware clock. However, if no time was | |
185 | * passed, user is requesting the opposite: set the system time from the | |
1634df56 | 186 | * hardware clock (RTC). */ |
a1bca57f LL |
187 | pid = fork(); |
188 | if (pid == 0) { | |
189 | setsid(); | |
190 | reopen_fd_to_null(0); | |
191 | reopen_fd_to_null(1); | |
192 | reopen_fd_to_null(2); | |
193 | ||
2c958923 MP |
194 | /* Use '/sbin/hwclock -w' to set RTC from the system time, |
195 | * or '/sbin/hwclock -s' to set the system time from RTC. */ | |
5c6096e5 | 196 | execle(hwclock_path, "hwclock", has_time ? "-w" : "-s", |
2c958923 | 197 | NULL, environ); |
a1bca57f LL |
198 | _exit(EXIT_FAILURE); |
199 | } else if (pid < 0) { | |
200 | error_setg_errno(errp, errno, "failed to create child process"); | |
201 | return; | |
202 | } | |
203 | ||
204 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 205 | if (local_err) { |
a1bca57f LL |
206 | error_propagate(errp, local_err); |
207 | return; | |
208 | } | |
209 | ||
210 | if (!WIFEXITED(status)) { | |
211 | error_setg(errp, "child process has terminated abnormally"); | |
212 | return; | |
213 | } | |
214 | ||
215 | if (WEXITSTATUS(status)) { | |
216 | error_setg(errp, "hwclock failed to set hardware clock to system time"); | |
217 | return; | |
218 | } | |
219 | } | |
220 | ||
895b00f6 MAL |
221 | typedef enum { |
222 | RW_STATE_NEW, | |
223 | RW_STATE_READING, | |
224 | RW_STATE_WRITING, | |
225 | } RwState; | |
226 | ||
5d3586b8 | 227 | struct GuestFileHandle { |
e3d4d252 MR |
228 | uint64_t id; |
229 | FILE *fh; | |
895b00f6 | 230 | RwState state; |
e3d4d252 | 231 | QTAILQ_ENTRY(GuestFileHandle) next; |
5d3586b8 | 232 | }; |
e3d4d252 MR |
233 | |
234 | static struct { | |
235 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
b4fe97c8 DL |
236 | } guest_file_state = { |
237 | .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), | |
238 | }; | |
e3d4d252 | 239 | |
39097daf | 240 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) |
e3d4d252 MR |
241 | { |
242 | GuestFileHandle *gfh; | |
39097daf MR |
243 | int64_t handle; |
244 | ||
245 | handle = ga_get_fd_handle(ga_state, errp); | |
a903f40c MA |
246 | if (handle < 0) { |
247 | return -1; | |
39097daf | 248 | } |
e3d4d252 | 249 | |
f3a06403 | 250 | gfh = g_new0(GuestFileHandle, 1); |
39097daf | 251 | gfh->id = handle; |
e3d4d252 MR |
252 | gfh->fh = fh; |
253 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
39097daf MR |
254 | |
255 | return handle; | |
e3d4d252 MR |
256 | } |
257 | ||
5d3586b8 | 258 | GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) |
e3d4d252 MR |
259 | { |
260 | GuestFileHandle *gfh; | |
261 | ||
262 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
263 | { | |
264 | if (gfh->id == id) { | |
265 | return gfh; | |
266 | } | |
267 | } | |
268 | ||
77dbc81b | 269 | error_setg(errp, "handle '%" PRId64 "' has not been found", id); |
e3d4d252 MR |
270 | return NULL; |
271 | } | |
272 | ||
c689b4f1 LE |
273 | typedef const char * const ccpc; |
274 | ||
8fe6bbca LE |
275 | #ifndef O_BINARY |
276 | #define O_BINARY 0 | |
277 | #endif | |
278 | ||
c689b4f1 LE |
279 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ |
280 | static const struct { | |
281 | ccpc *forms; | |
282 | int oflag_base; | |
283 | } guest_file_open_modes[] = { | |
8fe6bbca LE |
284 | { (ccpc[]){ "r", NULL }, O_RDONLY }, |
285 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, | |
286 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, | |
287 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, | |
288 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, | |
289 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, | |
290 | { (ccpc[]){ "r+", NULL }, O_RDWR }, | |
291 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, | |
292 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, | |
293 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, | |
294 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, | |
295 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } | |
c689b4f1 LE |
296 | }; |
297 | ||
298 | static int | |
77dbc81b | 299 | find_open_flag(const char *mode_str, Error **errp) |
c689b4f1 LE |
300 | { |
301 | unsigned mode; | |
302 | ||
303 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { | |
304 | ccpc *form; | |
305 | ||
306 | form = guest_file_open_modes[mode].forms; | |
307 | while (*form != NULL && strcmp(*form, mode_str) != 0) { | |
308 | ++form; | |
309 | } | |
310 | if (*form != NULL) { | |
311 | break; | |
312 | } | |
313 | } | |
314 | ||
315 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { | |
77dbc81b | 316 | error_setg(errp, "invalid file open mode '%s'", mode_str); |
c689b4f1 LE |
317 | return -1; |
318 | } | |
319 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; | |
320 | } | |
321 | ||
322 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ | |
323 | S_IRGRP | S_IWGRP | \ | |
324 | S_IROTH | S_IWOTH) | |
325 | ||
326 | static FILE * | |
77dbc81b | 327 | safe_open_or_create(const char *path, const char *mode, Error **errp) |
c689b4f1 LE |
328 | { |
329 | Error *local_err = NULL; | |
330 | int oflag; | |
331 | ||
332 | oflag = find_open_flag(mode, &local_err); | |
333 | if (local_err == NULL) { | |
334 | int fd; | |
335 | ||
336 | /* If the caller wants / allows creation of a new file, we implement it | |
337 | * with a two step process: open() + (open() / fchmod()). | |
338 | * | |
339 | * First we insist on creating the file exclusively as a new file. If | |
340 | * that succeeds, we're free to set any file-mode bits on it. (The | |
341 | * motivation is that we want to set those file-mode bits independently | |
342 | * of the current umask.) | |
343 | * | |
344 | * If the exclusive creation fails because the file already exists | |
345 | * (EEXIST is not possible for any other reason), we just attempt to | |
346 | * open the file, but in this case we won't be allowed to change the | |
347 | * file-mode bits on the preexistent file. | |
348 | * | |
349 | * The pathname should never disappear between the two open()s in | |
350 | * practice. If it happens, then someone very likely tried to race us. | |
351 | * In this case just go ahead and report the ENOENT from the second | |
352 | * open() to the caller. | |
353 | * | |
354 | * If the caller wants to open a preexistent file, then the first | |
355 | * open() is decisive and its third argument is ignored, and the second | |
356 | * open() and the fchmod() are never called. | |
357 | */ | |
358 | fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); | |
359 | if (fd == -1 && errno == EEXIST) { | |
360 | oflag &= ~(unsigned)O_CREAT; | |
361 | fd = open(path, oflag); | |
362 | } | |
363 | ||
364 | if (fd == -1) { | |
365 | error_setg_errno(&local_err, errno, "failed to open file '%s' " | |
366 | "(mode: '%s')", path, mode); | |
367 | } else { | |
368 | qemu_set_cloexec(fd); | |
369 | ||
370 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { | |
371 | error_setg_errno(&local_err, errno, "failed to set permission " | |
372 | "0%03o on new file '%s' (mode: '%s')", | |
373 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); | |
374 | } else { | |
375 | FILE *f; | |
376 | ||
377 | f = fdopen(fd, mode); | |
378 | if (f == NULL) { | |
379 | error_setg_errno(&local_err, errno, "failed to associate " | |
380 | "stdio stream with file descriptor %d, " | |
381 | "file '%s' (mode: '%s')", fd, path, mode); | |
382 | } else { | |
383 | return f; | |
384 | } | |
385 | } | |
386 | ||
387 | close(fd); | |
2b720018 LE |
388 | if (oflag & O_CREAT) { |
389 | unlink(path); | |
390 | } | |
c689b4f1 LE |
391 | } |
392 | } | |
393 | ||
77dbc81b | 394 | error_propagate(errp, local_err); |
c689b4f1 LE |
395 | return NULL; |
396 | } | |
397 | ||
77dbc81b MA |
398 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, |
399 | Error **errp) | |
e3d4d252 MR |
400 | { |
401 | FILE *fh; | |
c689b4f1 | 402 | Error *local_err = NULL; |
85b6f6f5 | 403 | int64_t handle; |
e3d4d252 MR |
404 | |
405 | if (!has_mode) { | |
406 | mode = "r"; | |
407 | } | |
408 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
c689b4f1 LE |
409 | fh = safe_open_or_create(path, mode, &local_err); |
410 | if (local_err != NULL) { | |
77dbc81b | 411 | error_propagate(errp, local_err); |
e3d4d252 MR |
412 | return -1; |
413 | } | |
414 | ||
415 | /* set fd non-blocking to avoid common use cases (like reading from a | |
416 | * named pipe) from hanging the agent | |
417 | */ | |
12505396 | 418 | qemu_set_nonblock(fileno(fh)); |
e3d4d252 | 419 | |
77dbc81b | 420 | handle = guest_file_handle_add(fh, errp); |
a903f40c | 421 | if (handle < 0) { |
39097daf MR |
422 | fclose(fh); |
423 | return -1; | |
424 | } | |
425 | ||
d607a523 | 426 | slog("guest-file-open, handle: %" PRId64, handle); |
39097daf | 427 | return handle; |
e3d4d252 MR |
428 | } |
429 | ||
77dbc81b | 430 | void qmp_guest_file_close(int64_t handle, Error **errp) |
e3d4d252 | 431 | { |
77dbc81b | 432 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
433 | int ret; |
434 | ||
d607a523 | 435 | slog("guest-file-close called, handle: %" PRId64, handle); |
e3d4d252 | 436 | if (!gfh) { |
e3d4d252 MR |
437 | return; |
438 | } | |
439 | ||
440 | ret = fclose(gfh->fh); | |
3ac4b7c5 | 441 | if (ret == EOF) { |
77dbc81b | 442 | error_setg_errno(errp, errno, "failed to close handle"); |
e3d4d252 MR |
443 | return; |
444 | } | |
445 | ||
446 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 447 | g_free(gfh); |
e3d4d252 MR |
448 | } |
449 | ||
ead83a13 PMD |
450 | GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh, |
451 | int64_t count, Error **errp) | |
e3d4d252 | 452 | { |
e3d4d252 MR |
453 | GuestFileRead *read_data = NULL; |
454 | guchar *buf; | |
ead83a13 | 455 | FILE *fh = gfh->fh; |
e3d4d252 MR |
456 | size_t read_count; |
457 | ||
895b00f6 MAL |
458 | /* explicitly flush when switching from writing to reading */ |
459 | if (gfh->state == RW_STATE_WRITING) { | |
460 | int ret = fflush(fh); | |
461 | if (ret == EOF) { | |
462 | error_setg_errno(errp, errno, "failed to flush file"); | |
463 | return NULL; | |
464 | } | |
465 | gfh->state = RW_STATE_NEW; | |
466 | } | |
467 | ||
0697e9ed | 468 | buf = g_malloc0(count + 1); |
e3d4d252 MR |
469 | read_count = fread(buf, 1, count, fh); |
470 | if (ferror(fh)) { | |
77dbc81b | 471 | error_setg_errno(errp, errno, "failed to read file"); |
e3d4d252 MR |
472 | } else { |
473 | buf[read_count] = 0; | |
f3a06403 | 474 | read_data = g_new0(GuestFileRead, 1); |
e3d4d252 MR |
475 | read_data->count = read_count; |
476 | read_data->eof = feof(fh); | |
477 | if (read_count) { | |
478 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
479 | } | |
895b00f6 | 480 | gfh->state = RW_STATE_READING; |
e3d4d252 | 481 | } |
7267c094 | 482 | g_free(buf); |
e3d4d252 MR |
483 | clearerr(fh); |
484 | ||
485 | return read_data; | |
486 | } | |
487 | ||
488 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
77dbc81b MA |
489 | bool has_count, int64_t count, |
490 | Error **errp) | |
e3d4d252 MR |
491 | { |
492 | GuestFileWrite *write_data = NULL; | |
493 | guchar *buf; | |
494 | gsize buf_len; | |
495 | int write_count; | |
77dbc81b | 496 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
497 | FILE *fh; |
498 | ||
499 | if (!gfh) { | |
e3d4d252 MR |
500 | return NULL; |
501 | } | |
502 | ||
503 | fh = gfh->fh; | |
895b00f6 MAL |
504 | |
505 | if (gfh->state == RW_STATE_READING) { | |
506 | int ret = fseek(fh, 0, SEEK_CUR); | |
507 | if (ret == -1) { | |
508 | error_setg_errno(errp, errno, "failed to seek file"); | |
509 | return NULL; | |
510 | } | |
511 | gfh->state = RW_STATE_NEW; | |
512 | } | |
513 | ||
920639ca DB |
514 | buf = qbase64_decode(buf_b64, -1, &buf_len, errp); |
515 | if (!buf) { | |
516 | return NULL; | |
517 | } | |
e3d4d252 MR |
518 | |
519 | if (!has_count) { | |
520 | count = buf_len; | |
521 | } else if (count < 0 || count > buf_len) { | |
77dbc81b | 522 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", |
db3edb66 | 523 | count); |
7267c094 | 524 | g_free(buf); |
e3d4d252 MR |
525 | return NULL; |
526 | } | |
527 | ||
528 | write_count = fwrite(buf, 1, count, fh); | |
529 | if (ferror(fh)) { | |
77dbc81b | 530 | error_setg_errno(errp, errno, "failed to write to file"); |
d607a523 | 531 | slog("guest-file-write failed, handle: %" PRId64, handle); |
e3d4d252 | 532 | } else { |
f3a06403 | 533 | write_data = g_new0(GuestFileWrite, 1); |
e3d4d252 MR |
534 | write_data->count = write_count; |
535 | write_data->eof = feof(fh); | |
895b00f6 | 536 | gfh->state = RW_STATE_WRITING; |
e3d4d252 | 537 | } |
7267c094 | 538 | g_free(buf); |
e3d4d252 MR |
539 | clearerr(fh); |
540 | ||
541 | return write_data; | |
542 | } | |
543 | ||
544 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
0b4b4938 EB |
545 | GuestFileWhence *whence_code, |
546 | Error **errp) | |
e3d4d252 | 547 | { |
77dbc81b | 548 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
549 | GuestFileSeek *seek_data = NULL; |
550 | FILE *fh; | |
551 | int ret; | |
0a982b1b | 552 | int whence; |
0b4b4938 | 553 | Error *err = NULL; |
e3d4d252 MR |
554 | |
555 | if (!gfh) { | |
e3d4d252 MR |
556 | return NULL; |
557 | } | |
558 | ||
0a982b1b | 559 | /* We stupidly exposed 'whence':'int' in our qapi */ |
0b4b4938 EB |
560 | whence = ga_parse_whence(whence_code, &err); |
561 | if (err) { | |
562 | error_propagate(errp, err); | |
0a982b1b EB |
563 | return NULL; |
564 | } | |
565 | ||
e3d4d252 MR |
566 | fh = gfh->fh; |
567 | ret = fseek(fh, offset, whence); | |
568 | if (ret == -1) { | |
77dbc81b | 569 | error_setg_errno(errp, errno, "failed to seek file"); |
895b00f6 MAL |
570 | if (errno == ESPIPE) { |
571 | /* file is non-seekable, stdio shouldn't be buffering anyways */ | |
572 | gfh->state = RW_STATE_NEW; | |
573 | } | |
e3d4d252 | 574 | } else { |
10b7c5dd | 575 | seek_data = g_new0(GuestFileSeek, 1); |
e3d4d252 MR |
576 | seek_data->position = ftell(fh); |
577 | seek_data->eof = feof(fh); | |
895b00f6 | 578 | gfh->state = RW_STATE_NEW; |
e3d4d252 MR |
579 | } |
580 | clearerr(fh); | |
581 | ||
582 | return seek_data; | |
583 | } | |
584 | ||
77dbc81b | 585 | void qmp_guest_file_flush(int64_t handle, Error **errp) |
e3d4d252 | 586 | { |
77dbc81b | 587 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
588 | FILE *fh; |
589 | int ret; | |
590 | ||
591 | if (!gfh) { | |
e3d4d252 MR |
592 | return; |
593 | } | |
594 | ||
595 | fh = gfh->fh; | |
596 | ret = fflush(fh); | |
597 | if (ret == EOF) { | |
77dbc81b | 598 | error_setg_errno(errp, errno, "failed to flush file"); |
895b00f6 MAL |
599 | } else { |
600 | gfh->state = RW_STATE_NEW; | |
e3d4d252 MR |
601 | } |
602 | } | |
603 | ||
e72c3f2e MR |
604 | /* linux-specific implementations. avoid this if at all possible. */ |
605 | #if defined(__linux__) | |
606 | ||
eab5fd59 | 607 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
af02203f | 608 | typedef struct FsMount { |
e3d4d252 MR |
609 | char *dirname; |
610 | char *devtype; | |
46d4c572 | 611 | unsigned int devmajor, devminor; |
af02203f PB |
612 | QTAILQ_ENTRY(FsMount) next; |
613 | } FsMount; | |
e3d4d252 | 614 | |
e5d9adbd | 615 | typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; |
9e8aded4 | 616 | |
af02203f | 617 | static void free_fs_mount_list(FsMountList *mounts) |
9e8aded4 | 618 | { |
af02203f | 619 | FsMount *mount, *temp; |
9e8aded4 MR |
620 | |
621 | if (!mounts) { | |
622 | return; | |
623 | } | |
624 | ||
625 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
626 | QTAILQ_REMOVE(mounts, mount, next); | |
627 | g_free(mount->dirname); | |
628 | g_free(mount->devtype); | |
629 | g_free(mount); | |
630 | } | |
631 | } | |
632 | ||
46d4c572 TS |
633 | static int dev_major_minor(const char *devpath, |
634 | unsigned int *devmajor, unsigned int *devminor) | |
635 | { | |
636 | struct stat st; | |
637 | ||
638 | *devmajor = 0; | |
639 | *devminor = 0; | |
640 | ||
641 | if (stat(devpath, &st) < 0) { | |
642 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); | |
643 | return -1; | |
644 | } | |
645 | if (S_ISDIR(st.st_mode)) { | |
646 | /* It is bind mount */ | |
647 | return -2; | |
648 | } | |
649 | if (S_ISBLK(st.st_mode)) { | |
650 | *devmajor = major(st.st_rdev); | |
651 | *devminor = minor(st.st_rdev); | |
652 | return 0; | |
653 | } | |
654 | return -1; | |
655 | } | |
656 | ||
e3d4d252 MR |
657 | /* |
658 | * Walk the mount table and build a list of local file systems | |
659 | */ | |
46d4c572 | 660 | static void build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) |
e3d4d252 MR |
661 | { |
662 | struct mntent *ment; | |
af02203f | 663 | FsMount *mount; |
9e2fa418 | 664 | char const *mtab = "/proc/self/mounts"; |
e3d4d252 | 665 | FILE *fp; |
46d4c572 | 666 | unsigned int devmajor, devminor; |
e3d4d252 | 667 | |
e3d4d252 MR |
668 | fp = setmntent(mtab, "r"); |
669 | if (!fp) { | |
77dbc81b | 670 | error_setg(errp, "failed to open mtab file: '%s'", mtab); |
261551d1 | 671 | return; |
e3d4d252 MR |
672 | } |
673 | ||
674 | while ((ment = getmntent(fp))) { | |
675 | /* | |
676 | * An entry which device name doesn't start with a '/' is | |
677 | * either a dummy file system or a network file system. | |
678 | * Add special handling for smbfs and cifs as is done by | |
679 | * coreutils as well. | |
680 | */ | |
681 | if ((ment->mnt_fsname[0] != '/') || | |
682 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
683 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
684 | continue; | |
685 | } | |
46d4c572 TS |
686 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { |
687 | /* Skip bind mounts */ | |
688 | continue; | |
689 | } | |
e3d4d252 | 690 | |
f3a06403 | 691 | mount = g_new0(FsMount, 1); |
7267c094 AL |
692 | mount->dirname = g_strdup(ment->mnt_dir); |
693 | mount->devtype = g_strdup(ment->mnt_type); | |
46d4c572 TS |
694 | mount->devmajor = devmajor; |
695 | mount->devminor = devminor; | |
e3d4d252 | 696 | |
9e8aded4 | 697 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
698 | } |
699 | ||
700 | endmntent(fp); | |
e3d4d252 | 701 | } |
46d4c572 TS |
702 | |
703 | static void decode_mntname(char *name, int len) | |
704 | { | |
705 | int i, j = 0; | |
706 | for (i = 0; i <= len; i++) { | |
707 | if (name[i] != '\\') { | |
708 | name[j++] = name[i]; | |
709 | } else if (name[i + 1] == '\\') { | |
710 | name[j++] = '\\'; | |
711 | i++; | |
712 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && | |
713 | name[i + 2] >= '0' && name[i + 2] <= '7' && | |
714 | name[i + 3] >= '0' && name[i + 3] <= '7') { | |
715 | name[j++] = (name[i + 1] - '0') * 64 + | |
716 | (name[i + 2] - '0') * 8 + | |
717 | (name[i + 3] - '0'); | |
718 | i += 3; | |
719 | } else { | |
720 | name[j++] = name[i]; | |
721 | } | |
722 | } | |
723 | } | |
724 | ||
725 | static void build_fs_mount_list(FsMountList *mounts, Error **errp) | |
726 | { | |
727 | FsMount *mount; | |
728 | char const *mountinfo = "/proc/self/mountinfo"; | |
729 | FILE *fp; | |
730 | char *line = NULL, *dash; | |
731 | size_t n; | |
732 | char check; | |
733 | unsigned int devmajor, devminor; | |
734 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; | |
735 | ||
736 | fp = fopen(mountinfo, "r"); | |
737 | if (!fp) { | |
738 | build_fs_mount_list_from_mtab(mounts, errp); | |
739 | return; | |
740 | } | |
741 | ||
742 | while (getline(&line, &n, fp) != -1) { | |
743 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", | |
744 | &devmajor, &devminor, &dir_s, &dir_e, &check); | |
745 | if (ret < 3) { | |
746 | continue; | |
747 | } | |
748 | dash = strstr(line + dir_e, " - "); | |
749 | if (!dash) { | |
750 | continue; | |
751 | } | |
752 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", | |
753 | &type_s, &type_e, &dev_s, &dev_e, &check); | |
754 | if (ret < 1) { | |
755 | continue; | |
756 | } | |
757 | line[dir_e] = 0; | |
758 | dash[type_e] = 0; | |
759 | dash[dev_e] = 0; | |
760 | decode_mntname(line + dir_s, dir_e - dir_s); | |
761 | decode_mntname(dash + dev_s, dev_e - dev_s); | |
762 | if (devmajor == 0) { | |
763 | /* btrfs reports major number = 0 */ | |
764 | if (strcmp("btrfs", dash + type_s) != 0 || | |
765 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { | |
766 | continue; | |
767 | } | |
768 | } | |
769 | ||
f3a06403 | 770 | mount = g_new0(FsMount, 1); |
46d4c572 TS |
771 | mount->dirname = g_strdup(line + dir_s); |
772 | mount->devtype = g_strdup(dash + type_s); | |
773 | mount->devmajor = devmajor; | |
774 | mount->devminor = devminor; | |
775 | ||
776 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
777 | } | |
778 | free(line); | |
779 | ||
780 | fclose(fp); | |
781 | } | |
eab5fd59 PB |
782 | #endif |
783 | ||
784 | #if defined(CONFIG_FSFREEZE) | |
e3d4d252 | 785 | |
46d4c572 TS |
786 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) |
787 | { | |
788 | char *path; | |
789 | char *dpath; | |
790 | char *driver = NULL; | |
791 | char buf[PATH_MAX]; | |
792 | ssize_t len; | |
793 | ||
794 | path = g_strndup(syspath, pathlen); | |
795 | dpath = g_strdup_printf("%s/driver", path); | |
796 | len = readlink(dpath, buf, sizeof(buf) - 1); | |
797 | if (len != -1) { | |
798 | buf[len] = 0; | |
3e015d81 | 799 | driver = g_path_get_basename(buf); |
46d4c572 TS |
800 | } |
801 | g_free(dpath); | |
802 | g_free(path); | |
803 | return driver; | |
804 | } | |
805 | ||
806 | static int compare_uint(const void *_a, const void *_b) | |
807 | { | |
808 | unsigned int a = *(unsigned int *)_a; | |
809 | unsigned int b = *(unsigned int *)_b; | |
810 | ||
811 | return a < b ? -1 : a > b ? 1 : 0; | |
812 | } | |
813 | ||
814 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ | |
815 | static int build_hosts(char const *syspath, char const *host, bool ata, | |
816 | unsigned int *hosts, int hosts_max, Error **errp) | |
817 | { | |
818 | char *path; | |
819 | DIR *dir; | |
820 | struct dirent *entry; | |
821 | int i = 0; | |
822 | ||
823 | path = g_strndup(syspath, host - syspath); | |
824 | dir = opendir(path); | |
825 | if (!dir) { | |
826 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); | |
827 | g_free(path); | |
828 | return -1; | |
829 | } | |
830 | ||
831 | while (i < hosts_max) { | |
832 | entry = readdir(dir); | |
833 | if (!entry) { | |
834 | break; | |
835 | } | |
836 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { | |
837 | ++i; | |
838 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { | |
839 | ++i; | |
840 | } | |
841 | } | |
842 | ||
843 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); | |
844 | ||
845 | g_free(path); | |
846 | closedir(dir); | |
847 | return i; | |
848 | } | |
849 | ||
d9fe4f0f TH |
850 | /* |
851 | * Store disk device info for devices on the PCI bus. | |
852 | * Returns true if information has been stored, or false for failure. | |
853 | */ | |
854 | static bool build_guest_fsinfo_for_pci_dev(char const *syspath, | |
855 | GuestDiskAddress *disk, | |
856 | Error **errp) | |
46d4c572 TS |
857 | { |
858 | unsigned int pci[4], host, hosts[8], tgt[3]; | |
859 | int i, nhosts = 0, pcilen; | |
d9fe4f0f | 860 | GuestPCIAddress *pciaddr = disk->pci_controller; |
46d4c572 TS |
861 | bool has_ata = false, has_host = false, has_tgt = false; |
862 | char *p, *q, *driver = NULL; | |
d9fe4f0f | 863 | bool ret = false; |
46d4c572 TS |
864 | |
865 | p = strstr(syspath, "/devices/pci"); | |
866 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", | |
867 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { | |
743c71d0 | 868 | g_debug("only pci device is supported: sysfs path '%s'", syspath); |
d9fe4f0f | 869 | return false; |
46d4c572 TS |
870 | } |
871 | ||
743c71d0 MAL |
872 | p += 12 + pcilen; |
873 | while (true) { | |
874 | driver = get_pci_driver(syspath, p - syspath, errp); | |
875 | if (driver && (g_str_equal(driver, "ata_piix") || | |
876 | g_str_equal(driver, "sym53c8xx") || | |
877 | g_str_equal(driver, "virtio-pci") || | |
878 | g_str_equal(driver, "ahci"))) { | |
879 | break; | |
880 | } | |
881 | ||
bb23a736 | 882 | g_free(driver); |
743c71d0 MAL |
883 | if (sscanf(p, "/%x:%x:%x.%x%n", |
884 | pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { | |
885 | p += pcilen; | |
886 | continue; | |
887 | } | |
888 | ||
889 | g_debug("unsupported driver or sysfs path '%s'", syspath); | |
d9fe4f0f | 890 | return false; |
46d4c572 TS |
891 | } |
892 | ||
893 | p = strstr(syspath, "/target"); | |
894 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
895 | tgt, tgt + 1, tgt + 2) == 3) { | |
896 | has_tgt = true; | |
897 | } | |
898 | ||
899 | p = strstr(syspath, "/ata"); | |
900 | if (p) { | |
901 | q = p + 4; | |
902 | has_ata = true; | |
903 | } else { | |
904 | p = strstr(syspath, "/host"); | |
905 | q = p + 5; | |
906 | } | |
907 | if (p && sscanf(q, "%u", &host) == 1) { | |
908 | has_host = true; | |
909 | nhosts = build_hosts(syspath, p, has_ata, hosts, | |
01a6df1b | 910 | ARRAY_SIZE(hosts), errp); |
46d4c572 TS |
911 | if (nhosts < 0) { |
912 | goto cleanup; | |
913 | } | |
914 | } | |
915 | ||
46d4c572 TS |
916 | pciaddr->domain = pci[0]; |
917 | pciaddr->bus = pci[1]; | |
918 | pciaddr->slot = pci[2]; | |
919 | pciaddr->function = pci[3]; | |
920 | ||
46d4c572 TS |
921 | if (strcmp(driver, "ata_piix") == 0) { |
922 | /* a host per ide bus, target*:0:<unit>:0 */ | |
923 | if (!has_host || !has_tgt) { | |
924 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
925 | goto cleanup; | |
926 | } | |
927 | for (i = 0; i < nhosts; i++) { | |
928 | if (host == hosts[i]) { | |
929 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; | |
930 | disk->bus = i; | |
931 | disk->unit = tgt[1]; | |
932 | break; | |
933 | } | |
934 | } | |
935 | if (i >= nhosts) { | |
936 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
937 | goto cleanup; | |
938 | } | |
939 | } else if (strcmp(driver, "sym53c8xx") == 0) { | |
940 | /* scsi(LSI Logic): target*:0:<unit>:0 */ | |
941 | if (!has_tgt) { | |
942 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
943 | goto cleanup; | |
944 | } | |
945 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
946 | disk->unit = tgt[1]; | |
947 | } else if (strcmp(driver, "virtio-pci") == 0) { | |
948 | if (has_tgt) { | |
949 | /* virtio-scsi: target*:0:0:<unit> */ | |
950 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
951 | disk->unit = tgt[2]; | |
952 | } else { | |
953 | /* virtio-blk: 1 disk per 1 device */ | |
954 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
955 | } | |
956 | } else if (strcmp(driver, "ahci") == 0) { | |
957 | /* ahci: 1 host per 1 unit */ | |
958 | if (!has_host || !has_tgt) { | |
959 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
960 | goto cleanup; | |
961 | } | |
962 | for (i = 0; i < nhosts; i++) { | |
963 | if (host == hosts[i]) { | |
964 | disk->unit = i; | |
965 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; | |
966 | break; | |
967 | } | |
968 | } | |
969 | if (i >= nhosts) { | |
970 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
971 | goto cleanup; | |
972 | } | |
973 | } else { | |
974 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); | |
975 | goto cleanup; | |
976 | } | |
977 | ||
d9fe4f0f | 978 | ret = true; |
46d4c572 TS |
979 | |
980 | cleanup: | |
46d4c572 | 981 | g_free(driver); |
d9fe4f0f TH |
982 | return ret; |
983 | } | |
984 | ||
23843c12 TH |
985 | /* |
986 | * Store disk device info for non-PCI virtio devices (for example s390x | |
987 | * channel I/O devices). Returns true if information has been stored, or | |
988 | * false for failure. | |
989 | */ | |
990 | static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, | |
991 | GuestDiskAddress *disk, | |
992 | Error **errp) | |
993 | { | |
994 | unsigned int tgt[3]; | |
995 | char *p; | |
996 | ||
997 | if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { | |
998 | g_debug("Unsupported virtio device '%s'", syspath); | |
999 | return false; | |
1000 | } | |
1001 | ||
1002 | p = strstr(syspath, "/target"); | |
1003 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
1004 | &tgt[0], &tgt[1], &tgt[2]) == 3) { | |
1005 | /* virtio-scsi: target*:0:<target>:<unit> */ | |
1006 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
1007 | disk->bus = tgt[0]; | |
1008 | disk->target = tgt[1]; | |
1009 | disk->unit = tgt[2]; | |
1010 | } else { | |
1011 | /* virtio-blk: 1 disk per 1 device */ | |
1012 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
1013 | } | |
1014 | ||
1015 | return true; | |
1016 | } | |
1017 | ||
5b723a5d TH |
1018 | /* |
1019 | * Store disk device info for CCW devices (s390x channel I/O devices). | |
1020 | * Returns true if information has been stored, or false for failure. | |
1021 | */ | |
1022 | static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, | |
1023 | GuestDiskAddress *disk, | |
1024 | Error **errp) | |
1025 | { | |
1026 | unsigned int cssid, ssid, subchno, devno; | |
1027 | char *p; | |
1028 | ||
1029 | p = strstr(syspath, "/devices/css"); | |
1030 | if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", | |
1031 | &cssid, &ssid, &subchno, &devno) < 4) { | |
1032 | g_debug("could not parse ccw device sysfs path: %s", syspath); | |
1033 | return false; | |
1034 | } | |
1035 | ||
1036 | disk->has_ccw_address = true; | |
1037 | disk->ccw_address = g_new0(GuestCCWAddress, 1); | |
1038 | disk->ccw_address->cssid = cssid; | |
1039 | disk->ccw_address->ssid = ssid; | |
1040 | disk->ccw_address->subchno = subchno; | |
1041 | disk->ccw_address->devno = devno; | |
1042 | ||
1043 | if (strstr(p, "/virtio")) { | |
1044 | build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1045 | } | |
1046 | ||
1047 | return true; | |
1048 | } | |
1049 | ||
d9fe4f0f TH |
1050 | /* Store disk device info specified by @sysfs into @fs */ |
1051 | static void build_guest_fsinfo_for_real_device(char const *syspath, | |
1052 | GuestFilesystemInfo *fs, | |
1053 | Error **errp) | |
1054 | { | |
1055 | GuestDiskAddress *disk; | |
1056 | GuestPCIAddress *pciaddr; | |
d9fe4f0f | 1057 | bool has_hwinf; |
43dadc43 TH |
1058 | #ifdef CONFIG_LIBUDEV |
1059 | struct udev *udev = NULL; | |
1060 | struct udev_device *udevice = NULL; | |
1061 | #endif | |
d9fe4f0f TH |
1062 | |
1063 | pciaddr = g_new0(GuestPCIAddress, 1); | |
43dadc43 TH |
1064 | pciaddr->domain = -1; /* -1 means field is invalid */ |
1065 | pciaddr->bus = -1; | |
1066 | pciaddr->slot = -1; | |
1067 | pciaddr->function = -1; | |
d9fe4f0f TH |
1068 | |
1069 | disk = g_new0(GuestDiskAddress, 1); | |
1070 | disk->pci_controller = pciaddr; | |
43dadc43 | 1071 | disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; |
d9fe4f0f | 1072 | |
43dadc43 TH |
1073 | #ifdef CONFIG_LIBUDEV |
1074 | udev = udev_new(); | |
1075 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1076 | if (udev == NULL || udevice == NULL) { | |
1077 | g_debug("failed to query udev"); | |
1078 | } else { | |
1079 | const char *devnode, *serial; | |
1080 | devnode = udev_device_get_devnode(udevice); | |
1081 | if (devnode != NULL) { | |
1082 | disk->dev = g_strdup(devnode); | |
1083 | disk->has_dev = true; | |
1084 | } | |
1085 | serial = udev_device_get_property_value(udevice, "ID_SERIAL"); | |
1086 | if (serial != NULL && *serial != 0) { | |
1087 | disk->serial = g_strdup(serial); | |
1088 | disk->has_serial = true; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | udev_unref(udev); | |
1093 | udev_device_unref(udevice); | |
1094 | #endif | |
1095 | ||
23843c12 TH |
1096 | if (strstr(syspath, "/devices/pci")) { |
1097 | has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); | |
5b723a5d TH |
1098 | } else if (strstr(syspath, "/devices/css")) { |
1099 | has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); | |
23843c12 TH |
1100 | } else if (strstr(syspath, "/virtio")) { |
1101 | has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1102 | } else { | |
1103 | g_debug("Unsupported device type for '%s'", syspath); | |
1104 | has_hwinf = false; | |
1105 | } | |
d9fe4f0f | 1106 | |
43dadc43 | 1107 | if (has_hwinf || disk->has_dev || disk->has_serial) { |
54aa3de7 | 1108 | QAPI_LIST_PREPEND(fs->disk, disk); |
d9fe4f0f | 1109 | } else { |
54aa3de7 | 1110 | qapi_free_GuestDiskAddress(disk); |
d9fe4f0f | 1111 | } |
46d4c572 TS |
1112 | } |
1113 | ||
1114 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1115 | GuestFilesystemInfo *fs, | |
1116 | Error **errp); | |
1117 | ||
1118 | /* Store a list of slave devices of virtual volume specified by @syspath into | |
1119 | * @fs */ | |
1120 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, | |
1121 | GuestFilesystemInfo *fs, | |
1122 | Error **errp) | |
1123 | { | |
292743d9 | 1124 | Error *err = NULL; |
46d4c572 TS |
1125 | DIR *dir; |
1126 | char *dirpath; | |
e668d1b8 | 1127 | struct dirent *entry; |
46d4c572 TS |
1128 | |
1129 | dirpath = g_strdup_printf("%s/slaves", syspath); | |
1130 | dir = opendir(dirpath); | |
1131 | if (!dir) { | |
8251a72f MR |
1132 | if (errno != ENOENT) { |
1133 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); | |
1134 | } | |
46d4c572 TS |
1135 | g_free(dirpath); |
1136 | return; | |
1137 | } | |
46d4c572 TS |
1138 | |
1139 | for (;;) { | |
e668d1b8 HZ |
1140 | errno = 0; |
1141 | entry = readdir(dir); | |
1142 | if (entry == NULL) { | |
1143 | if (errno) { | |
1144 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); | |
1145 | } | |
46d4c572 TS |
1146 | break; |
1147 | } | |
1148 | ||
e668d1b8 HZ |
1149 | if (entry->d_type == DT_LNK) { |
1150 | char *path; | |
1151 | ||
1152 | g_debug(" slave device '%s'", entry->d_name); | |
1153 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); | |
292743d9 | 1154 | build_guest_fsinfo_for_device(path, fs, &err); |
e668d1b8 | 1155 | g_free(path); |
46d4c572 | 1156 | |
292743d9 MA |
1157 | if (err) { |
1158 | error_propagate(errp, err); | |
46d4c572 TS |
1159 | break; |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ||
e668d1b8 | 1164 | g_free(dirpath); |
46d4c572 TS |
1165 | closedir(dir); |
1166 | } | |
1167 | ||
fed39564 TG |
1168 | static bool is_disk_virtual(const char *devpath, Error **errp) |
1169 | { | |
1170 | g_autofree char *syspath = realpath(devpath, NULL); | |
1171 | ||
1172 | if (!syspath) { | |
1173 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1174 | return false; | |
1175 | } | |
1176 | return strstr(syspath, "/devices/virtual/block/") != NULL; | |
1177 | } | |
1178 | ||
46d4c572 TS |
1179 | /* Dispatch to functions for virtual/real device */ |
1180 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1181 | GuestFilesystemInfo *fs, | |
1182 | Error **errp) | |
1183 | { | |
fed39564 TG |
1184 | ERRP_GUARD(); |
1185 | g_autofree char *syspath = NULL; | |
1186 | bool is_virtual = false; | |
46d4c572 | 1187 | |
fed39564 | 1188 | syspath = realpath(devpath, NULL); |
46d4c572 TS |
1189 | if (!syspath) { |
1190 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1191 | return; | |
1192 | } | |
1193 | ||
1194 | if (!fs->name) { | |
3e015d81 | 1195 | fs->name = g_path_get_basename(syspath); |
46d4c572 TS |
1196 | } |
1197 | ||
1198 | g_debug(" parse sysfs path '%s'", syspath); | |
fed39564 TG |
1199 | is_virtual = is_disk_virtual(syspath, errp); |
1200 | if (*errp != NULL) { | |
1201 | return; | |
1202 | } | |
1203 | if (is_virtual) { | |
46d4c572 TS |
1204 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); |
1205 | } else { | |
1206 | build_guest_fsinfo_for_real_device(syspath, fs, errp); | |
1207 | } | |
fed39564 TG |
1208 | } |
1209 | ||
1210 | #ifdef CONFIG_LIBUDEV | |
1211 | ||
1212 | /* | |
1213 | * Wrapper around build_guest_fsinfo_for_device() for getting just | |
1214 | * the disk address. | |
1215 | */ | |
1216 | static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) | |
1217 | { | |
1218 | g_autoptr(GuestFilesystemInfo) fs = NULL; | |
46d4c572 | 1219 | |
fed39564 TG |
1220 | fs = g_new0(GuestFilesystemInfo, 1); |
1221 | build_guest_fsinfo_for_device(syspath, fs, errp); | |
1222 | if (fs->disk != NULL) { | |
1223 | return g_steal_pointer(&fs->disk->value); | |
1224 | } | |
1225 | return NULL; | |
46d4c572 TS |
1226 | } |
1227 | ||
fed39564 TG |
1228 | static char *get_alias_for_syspath(const char *syspath) |
1229 | { | |
1230 | struct udev *udev = NULL; | |
1231 | struct udev_device *udevice = NULL; | |
1232 | char *ret = NULL; | |
1233 | ||
1234 | udev = udev_new(); | |
1235 | if (udev == NULL) { | |
1236 | g_debug("failed to query udev"); | |
1237 | goto out; | |
1238 | } | |
1239 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1240 | if (udevice == NULL) { | |
1241 | g_debug("failed to query udev for path: %s", syspath); | |
1242 | goto out; | |
1243 | } else { | |
1244 | const char *alias = udev_device_get_property_value( | |
1245 | udevice, "DM_NAME"); | |
1246 | /* | |
1247 | * NULL means there was an error and empty string means there is no | |
1248 | * alias. In case of no alias we return NULL instead of empty string. | |
1249 | */ | |
1250 | if (alias == NULL) { | |
1251 | g_debug("failed to query udev for device alias for: %s", | |
1252 | syspath); | |
1253 | } else if (*alias != 0) { | |
1254 | ret = g_strdup(alias); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | out: | |
1259 | udev_unref(udev); | |
1260 | udev_device_unref(udevice); | |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | static char *get_device_for_syspath(const char *syspath) | |
1265 | { | |
1266 | struct udev *udev = NULL; | |
1267 | struct udev_device *udevice = NULL; | |
1268 | char *ret = NULL; | |
1269 | ||
1270 | udev = udev_new(); | |
1271 | if (udev == NULL) { | |
1272 | g_debug("failed to query udev"); | |
1273 | goto out; | |
1274 | } | |
1275 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1276 | if (udevice == NULL) { | |
1277 | g_debug("failed to query udev for path: %s", syspath); | |
1278 | goto out; | |
1279 | } else { | |
1280 | ret = g_strdup(udev_device_get_devnode(udevice)); | |
1281 | } | |
1282 | ||
1283 | out: | |
1284 | udev_unref(udev); | |
1285 | udev_device_unref(udevice); | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1289 | static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) | |
1290 | { | |
1291 | g_autofree char *deps_dir = NULL; | |
1292 | const gchar *dep; | |
1293 | GDir *dp_deps = NULL; | |
1294 | ||
1295 | /* List dependent disks */ | |
1296 | deps_dir = g_strdup_printf("%s/slaves", disk_dir); | |
1297 | g_debug(" listing entries in: %s", deps_dir); | |
1298 | dp_deps = g_dir_open(deps_dir, 0, NULL); | |
1299 | if (dp_deps == NULL) { | |
1300 | g_debug("failed to list entries in %s", deps_dir); | |
1301 | return; | |
1302 | } | |
a8aa94b5 | 1303 | disk->has_dependencies = true; |
fed39564 TG |
1304 | while ((dep = g_dir_read_name(dp_deps)) != NULL) { |
1305 | g_autofree char *dep_dir = NULL; | |
fed39564 TG |
1306 | char *dev_name; |
1307 | ||
1308 | /* Add dependent disks */ | |
1309 | dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); | |
1310 | dev_name = get_device_for_syspath(dep_dir); | |
1311 | if (dev_name != NULL) { | |
1312 | g_debug(" adding dependent device: %s", dev_name); | |
54aa3de7 | 1313 | QAPI_LIST_PREPEND(disk->dependencies, dev_name); |
fed39564 TG |
1314 | } |
1315 | } | |
1316 | g_dir_close(dp_deps); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Detect partitions subdirectory, name is "<disk_name><number>" or | |
1321 | * "<disk_name>p<number>" | |
1322 | * | |
1323 | * @disk_name -- last component of /sys path (e.g. sda) | |
1324 | * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) | |
1325 | * @disk_dev -- device node of the disk (e.g. /dev/sda) | |
1326 | */ | |
1327 | static GuestDiskInfoList *get_disk_partitions( | |
1328 | GuestDiskInfoList *list, | |
1329 | const char *disk_name, const char *disk_dir, | |
1330 | const char *disk_dev) | |
1331 | { | |
54aa3de7 | 1332 | GuestDiskInfoList *ret = list; |
fed39564 TG |
1333 | struct dirent *de_disk; |
1334 | DIR *dp_disk = NULL; | |
1335 | size_t len = strlen(disk_name); | |
1336 | ||
1337 | dp_disk = opendir(disk_dir); | |
1338 | while ((de_disk = readdir(dp_disk)) != NULL) { | |
1339 | g_autofree char *partition_dir = NULL; | |
1340 | char *dev_name; | |
1341 | GuestDiskInfo *partition; | |
1342 | ||
1343 | if (!(de_disk->d_type & DT_DIR)) { | |
1344 | continue; | |
1345 | } | |
1346 | ||
1347 | if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && | |
1348 | ((*(de_disk->d_name + len) == 'p' && | |
1349 | isdigit(*(de_disk->d_name + len + 1))) || | |
1350 | isdigit(*(de_disk->d_name + len))))) { | |
1351 | continue; | |
1352 | } | |
1353 | ||
1354 | partition_dir = g_strdup_printf("%s/%s", | |
1355 | disk_dir, de_disk->d_name); | |
1356 | dev_name = get_device_for_syspath(partition_dir); | |
1357 | if (dev_name == NULL) { | |
1358 | g_debug("Failed to get device name for syspath: %s", | |
1359 | disk_dir); | |
1360 | continue; | |
1361 | } | |
1362 | partition = g_new0(GuestDiskInfo, 1); | |
1363 | partition->name = dev_name; | |
1364 | partition->partition = true; | |
bac9b87b | 1365 | partition->has_dependencies = true; |
fed39564 | 1366 | /* Add parent disk as dependent for easier tracking of hierarchy */ |
54aa3de7 | 1367 | QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); |
fed39564 | 1368 | |
54aa3de7 | 1369 | QAPI_LIST_PREPEND(ret, partition); |
fed39564 TG |
1370 | } |
1371 | closedir(dp_disk); | |
1372 | ||
1373 | return ret; | |
1374 | } | |
1375 | ||
1376 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1377 | { | |
54aa3de7 | 1378 | GuestDiskInfoList *ret = NULL; |
fed39564 TG |
1379 | GuestDiskInfo *disk; |
1380 | DIR *dp = NULL; | |
1381 | struct dirent *de = NULL; | |
1382 | ||
1383 | g_debug("listing /sys/block directory"); | |
1384 | dp = opendir("/sys/block"); | |
1385 | if (dp == NULL) { | |
1386 | error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); | |
1387 | return NULL; | |
1388 | } | |
1389 | while ((de = readdir(dp)) != NULL) { | |
1390 | g_autofree char *disk_dir = NULL, *line = NULL, | |
1391 | *size_path = NULL; | |
1392 | char *dev_name; | |
1393 | Error *local_err = NULL; | |
1394 | if (de->d_type != DT_LNK) { | |
1395 | g_debug(" skipping entry: %s", de->d_name); | |
1396 | continue; | |
1397 | } | |
1398 | ||
1399 | /* Check size and skip zero-sized disks */ | |
1400 | g_debug(" checking disk size"); | |
1401 | size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); | |
1402 | if (!g_file_get_contents(size_path, &line, NULL, NULL)) { | |
1403 | g_debug(" failed to read disk size"); | |
1404 | continue; | |
1405 | } | |
1406 | if (g_strcmp0(line, "0\n") == 0) { | |
1407 | g_debug(" skipping zero-sized disk"); | |
1408 | continue; | |
1409 | } | |
1410 | ||
1411 | g_debug(" adding %s", de->d_name); | |
1412 | disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); | |
1413 | dev_name = get_device_for_syspath(disk_dir); | |
1414 | if (dev_name == NULL) { | |
1415 | g_debug("Failed to get device name for syspath: %s", | |
1416 | disk_dir); | |
1417 | continue; | |
1418 | } | |
1419 | disk = g_new0(GuestDiskInfo, 1); | |
1420 | disk->name = dev_name; | |
1421 | disk->partition = false; | |
1422 | disk->alias = get_alias_for_syspath(disk_dir); | |
1423 | disk->has_alias = (disk->alias != NULL); | |
54aa3de7 | 1424 | QAPI_LIST_PREPEND(ret, disk); |
fed39564 TG |
1425 | |
1426 | /* Get address for non-virtual devices */ | |
1427 | bool is_virtual = is_disk_virtual(disk_dir, &local_err); | |
1428 | if (local_err != NULL) { | |
1429 | g_debug(" failed to check disk path, ignoring error: %s", | |
1430 | error_get_pretty(local_err)); | |
1431 | error_free(local_err); | |
1432 | local_err = NULL; | |
1433 | /* Don't try to get the address */ | |
1434 | is_virtual = true; | |
1435 | } | |
1436 | if (!is_virtual) { | |
1437 | disk->address = get_disk_address(disk_dir, &local_err); | |
1438 | if (local_err != NULL) { | |
1439 | g_debug(" failed to get device info, ignoring error: %s", | |
1440 | error_get_pretty(local_err)); | |
1441 | error_free(local_err); | |
1442 | local_err = NULL; | |
1443 | } else if (disk->address != NULL) { | |
1444 | disk->has_address = true; | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | get_disk_deps(disk_dir, disk); | |
1449 | ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); | |
1450 | } | |
b1b9ab1c MR |
1451 | |
1452 | closedir(dp); | |
1453 | ||
fed39564 TG |
1454 | return ret; |
1455 | } | |
1456 | ||
1457 | #else | |
1458 | ||
1459 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1460 | { | |
1461 | error_setg(errp, QERR_UNSUPPORTED); | |
1462 | return NULL; | |
1463 | } | |
1464 | ||
1465 | #endif | |
1466 | ||
46d4c572 TS |
1467 | /* Return a list of the disk device(s)' info which @mount lies on */ |
1468 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, | |
1469 | Error **errp) | |
1470 | { | |
1471 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); | |
25b5ff1a CH |
1472 | struct statvfs buf; |
1473 | unsigned long used, nonroot_total, fr_size; | |
46d4c572 TS |
1474 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", |
1475 | mount->devmajor, mount->devminor); | |
1476 | ||
1477 | fs->mountpoint = g_strdup(mount->dirname); | |
1478 | fs->type = g_strdup(mount->devtype); | |
1479 | build_guest_fsinfo_for_device(devpath, fs, errp); | |
1480 | ||
25b5ff1a CH |
1481 | if (statvfs(fs->mountpoint, &buf) == 0) { |
1482 | fr_size = buf.f_frsize; | |
1483 | used = buf.f_blocks - buf.f_bfree; | |
1484 | nonroot_total = used + buf.f_bavail; | |
1485 | fs->used_bytes = used * fr_size; | |
1486 | fs->total_bytes = nonroot_total * fr_size; | |
1487 | ||
1488 | fs->has_total_bytes = true; | |
1489 | fs->has_used_bytes = true; | |
1490 | } | |
1491 | ||
46d4c572 | 1492 | g_free(devpath); |
25b5ff1a | 1493 | |
46d4c572 TS |
1494 | return fs; |
1495 | } | |
1496 | ||
1497 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
1498 | { | |
1499 | FsMountList mounts; | |
1500 | struct FsMount *mount; | |
54aa3de7 | 1501 | GuestFilesystemInfoList *ret = NULL; |
46d4c572 TS |
1502 | Error *local_err = NULL; |
1503 | ||
1504 | QTAILQ_INIT(&mounts); | |
1505 | build_fs_mount_list(&mounts, &local_err); | |
1506 | if (local_err) { | |
1507 | error_propagate(errp, local_err); | |
1508 | return NULL; | |
1509 | } | |
1510 | ||
1511 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1512 | g_debug("Building guest fsinfo for '%s'", mount->dirname); | |
1513 | ||
54aa3de7 | 1514 | QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); |
46d4c572 TS |
1515 | if (local_err) { |
1516 | error_propagate(errp, local_err); | |
1517 | qapi_free_GuestFilesystemInfoList(ret); | |
1518 | ret = NULL; | |
1519 | break; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | free_fs_mount_list(&mounts); | |
1524 | return ret; | |
1525 | } | |
1526 | ||
1527 | ||
ec0f694c TS |
1528 | typedef enum { |
1529 | FSFREEZE_HOOK_THAW = 0, | |
1530 | FSFREEZE_HOOK_FREEZE, | |
1531 | } FsfreezeHookArg; | |
1532 | ||
13a439ec | 1533 | static const char *fsfreeze_hook_arg_string[] = { |
ec0f694c TS |
1534 | "thaw", |
1535 | "freeze", | |
1536 | }; | |
1537 | ||
77dbc81b | 1538 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) |
ec0f694c TS |
1539 | { |
1540 | int status; | |
1541 | pid_t pid; | |
1542 | const char *hook; | |
1543 | const char *arg_str = fsfreeze_hook_arg_string[arg]; | |
1544 | Error *local_err = NULL; | |
1545 | ||
1546 | hook = ga_fsfreeze_hook(ga_state); | |
1547 | if (!hook) { | |
1548 | return; | |
1549 | } | |
1550 | if (access(hook, X_OK) != 0) { | |
77dbc81b | 1551 | error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); |
ec0f694c TS |
1552 | return; |
1553 | } | |
1554 | ||
1555 | slog("executing fsfreeze hook with arg '%s'", arg_str); | |
1556 | pid = fork(); | |
1557 | if (pid == 0) { | |
1558 | setsid(); | |
1559 | reopen_fd_to_null(0); | |
1560 | reopen_fd_to_null(1); | |
1561 | reopen_fd_to_null(2); | |
1562 | ||
1563 | execle(hook, hook, arg_str, NULL, environ); | |
1564 | _exit(EXIT_FAILURE); | |
1565 | } else if (pid < 0) { | |
77dbc81b | 1566 | error_setg_errno(errp, errno, "failed to create child process"); |
ec0f694c TS |
1567 | return; |
1568 | } | |
1569 | ||
1570 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 1571 | if (local_err) { |
77dbc81b | 1572 | error_propagate(errp, local_err); |
ec0f694c TS |
1573 | return; |
1574 | } | |
1575 | ||
1576 | if (!WIFEXITED(status)) { | |
77dbc81b | 1577 | error_setg(errp, "fsfreeze hook has terminated abnormally"); |
ec0f694c TS |
1578 | return; |
1579 | } | |
1580 | ||
1581 | status = WEXITSTATUS(status); | |
1582 | if (status) { | |
77dbc81b | 1583 | error_setg(errp, "fsfreeze hook has failed with status %d", status); |
ec0f694c TS |
1584 | return; |
1585 | } | |
1586 | } | |
1587 | ||
e3d4d252 MR |
1588 | /* |
1589 | * Return status of freeze/thaw | |
1590 | */ | |
77dbc81b | 1591 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e3d4d252 | 1592 | { |
f22d85e9 MR |
1593 | if (ga_is_frozen(ga_state)) { |
1594 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
1595 | } | |
1596 | ||
1597 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
1598 | } |
1599 | ||
e99bce20 TS |
1600 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
1601 | { | |
1602 | return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); | |
1603 | } | |
1604 | ||
e3d4d252 MR |
1605 | /* |
1606 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
1607 | * are real local file systems. | |
1608 | */ | |
e99bce20 TS |
1609 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
1610 | strList *mountpoints, | |
1611 | Error **errp) | |
e3d4d252 MR |
1612 | { |
1613 | int ret = 0, i = 0; | |
e99bce20 | 1614 | strList *list; |
af02203f PB |
1615 | FsMountList mounts; |
1616 | struct FsMount *mount; | |
261551d1 | 1617 | Error *local_err = NULL; |
e3d4d252 | 1618 | int fd; |
e3d4d252 MR |
1619 | |
1620 | slog("guest-fsfreeze called"); | |
1621 | ||
ec0f694c | 1622 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); |
84d18f06 | 1623 | if (local_err) { |
77dbc81b | 1624 | error_propagate(errp, local_err); |
ec0f694c TS |
1625 | return -1; |
1626 | } | |
1627 | ||
9e8aded4 | 1628 | QTAILQ_INIT(&mounts); |
261551d1 | 1629 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1630 | if (local_err) { |
77dbc81b | 1631 | error_propagate(errp, local_err); |
261551d1 | 1632 | return -1; |
e3d4d252 MR |
1633 | } |
1634 | ||
1635 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 1636 | ga_set_frozen(ga_state); |
e3d4d252 | 1637 | |
eae3eb3e | 1638 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { |
e99bce20 TS |
1639 | /* To issue fsfreeze in the reverse order of mounts, check if the |
1640 | * mount is listed in the list here */ | |
1641 | if (has_mountpoints) { | |
1642 | for (list = mountpoints; list; list = list->next) { | |
1643 | if (strcmp(list->value, mount->dirname) == 0) { | |
1644 | break; | |
1645 | } | |
1646 | } | |
1647 | if (!list) { | |
1648 | continue; | |
1649 | } | |
1650 | } | |
1651 | ||
448058aa | 1652 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
e3d4d252 | 1653 | if (fd == -1) { |
77dbc81b | 1654 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); |
e3d4d252 MR |
1655 | goto error; |
1656 | } | |
1657 | ||
e35916ac MT |
1658 | /* we try to cull filesystems we know won't work in advance, but other |
1659 | * filesystems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
1660 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
1661 | * the number of frozen filesystems. | |
ce2eb6c4 PL |
1662 | * if a filesystem is mounted more than once (aka bind mount) a |
1663 | * consecutive attempt to freeze an already frozen filesystem will | |
1664 | * return EBUSY. | |
9e8aded4 MR |
1665 | * |
1666 | * any other error means a failure to freeze a filesystem we | |
1667 | * expect to be freezable, so return an error in those cases | |
1668 | * and return system to thawed state. | |
e3d4d252 MR |
1669 | */ |
1670 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 | 1671 | if (ret == -1) { |
ce2eb6c4 | 1672 | if (errno != EOPNOTSUPP && errno != EBUSY) { |
77dbc81b | 1673 | error_setg_errno(errp, errno, "failed to freeze %s", |
617fbbc1 | 1674 | mount->dirname); |
9e8aded4 MR |
1675 | close(fd); |
1676 | goto error; | |
1677 | } | |
1678 | } else { | |
1679 | i++; | |
e3d4d252 MR |
1680 | } |
1681 | close(fd); | |
e3d4d252 MR |
1682 | } |
1683 | ||
af02203f | 1684 | free_fs_mount_list(&mounts); |
65650f01 CH |
1685 | /* We may not issue any FIFREEZE here. |
1686 | * Just unset ga_state here and ready for the next call. | |
1687 | */ | |
1688 | if (i == 0) { | |
1689 | ga_unset_frozen(ga_state); | |
1690 | } | |
e3d4d252 MR |
1691 | return i; |
1692 | ||
1693 | error: | |
af02203f | 1694 | free_fs_mount_list(&mounts); |
9e8aded4 | 1695 | qmp_guest_fsfreeze_thaw(NULL); |
e3d4d252 MR |
1696 | return 0; |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * Walk list of frozen file systems in the guest, and thaw them. | |
1701 | */ | |
77dbc81b | 1702 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e3d4d252 MR |
1703 | { |
1704 | int ret; | |
af02203f PB |
1705 | FsMountList mounts; |
1706 | FsMount *mount; | |
9e8aded4 | 1707 | int fd, i = 0, logged; |
261551d1 | 1708 | Error *local_err = NULL; |
9e8aded4 MR |
1709 | |
1710 | QTAILQ_INIT(&mounts); | |
261551d1 | 1711 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1712 | if (local_err) { |
77dbc81b | 1713 | error_propagate(errp, local_err); |
9e8aded4 MR |
1714 | return 0; |
1715 | } | |
e3d4d252 | 1716 | |
9e8aded4 MR |
1717 | QTAILQ_FOREACH(mount, &mounts, next) { |
1718 | logged = false; | |
448058aa | 1719 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
e3d4d252 | 1720 | if (fd == -1) { |
e3d4d252 MR |
1721 | continue; |
1722 | } | |
9e8aded4 MR |
1723 | /* we have no way of knowing whether a filesystem was actually unfrozen |
1724 | * as a result of a successful call to FITHAW, only that if an error | |
1725 | * was returned the filesystem was *not* unfrozen by that particular | |
1726 | * call. | |
1727 | * | |
a31f0531 | 1728 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
1729 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
1730 | * in which case either the filesystem is in an unfreezable state, or, | |
1731 | * more likely, it was thawed previously (and remains so afterward). | |
1732 | * | |
1733 | * also, since the most recent successful call is the one that did | |
1734 | * the actual unfreeze, we can use this to provide an accurate count | |
1735 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
1736 | * may * be useful for determining whether a filesystem was unfrozen | |
1737 | * during the freeze/thaw phase by a process other than qemu-ga. | |
1738 | */ | |
1739 | do { | |
1740 | ret = ioctl(fd, FITHAW); | |
1741 | if (ret == 0 && !logged) { | |
1742 | i++; | |
1743 | logged = true; | |
1744 | } | |
1745 | } while (ret == 0); | |
e3d4d252 | 1746 | close(fd); |
e3d4d252 MR |
1747 | } |
1748 | ||
f22d85e9 | 1749 | ga_unset_frozen(ga_state); |
af02203f | 1750 | free_fs_mount_list(&mounts); |
ec0f694c | 1751 | |
77dbc81b | 1752 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); |
ec0f694c | 1753 | |
e3d4d252 MR |
1754 | return i; |
1755 | } | |
1756 | ||
e3d4d252 MR |
1757 | static void guest_fsfreeze_cleanup(void) |
1758 | { | |
e3d4d252 MR |
1759 | Error *err = NULL; |
1760 | ||
f22d85e9 | 1761 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
6f686749 MA |
1762 | qmp_guest_fsfreeze_thaw(&err); |
1763 | if (err) { | |
1764 | slog("failed to clean up frozen filesystems: %s", | |
1765 | error_get_pretty(err)); | |
1766 | error_free(err); | |
e3d4d252 MR |
1767 | } |
1768 | } | |
1769 | } | |
e72c3f2e | 1770 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 1771 | |
eab5fd59 PB |
1772 | #if defined(CONFIG_FSTRIM) |
1773 | /* | |
1774 | * Walk list of mounted file systems in the guest, and trim them. | |
1775 | */ | |
e82855d9 JO |
1776 | GuestFilesystemTrimResponse * |
1777 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 1778 | { |
e82855d9 | 1779 | GuestFilesystemTrimResponse *response; |
e82855d9 | 1780 | GuestFilesystemTrimResult *result; |
eab5fd59 PB |
1781 | int ret = 0; |
1782 | FsMountList mounts; | |
1783 | struct FsMount *mount; | |
1784 | int fd; | |
261551d1 | 1785 | Error *local_err = NULL; |
73a652a1 | 1786 | struct fstrim_range r; |
eab5fd59 PB |
1787 | |
1788 | slog("guest-fstrim called"); | |
1789 | ||
1790 | QTAILQ_INIT(&mounts); | |
261551d1 | 1791 | build_fs_mount_list(&mounts, &local_err); |
84d18f06 | 1792 | if (local_err) { |
77dbc81b | 1793 | error_propagate(errp, local_err); |
e82855d9 | 1794 | return NULL; |
eab5fd59 PB |
1795 | } |
1796 | ||
e82855d9 JO |
1797 | response = g_malloc0(sizeof(*response)); |
1798 | ||
eab5fd59 | 1799 | QTAILQ_FOREACH(mount, &mounts, next) { |
e82855d9 JO |
1800 | result = g_malloc0(sizeof(*result)); |
1801 | result->path = g_strdup(mount->dirname); | |
1802 | ||
54aa3de7 | 1803 | QAPI_LIST_PREPEND(response->paths, result); |
e82855d9 | 1804 | |
448058aa | 1805 | fd = qemu_open_old(mount->dirname, O_RDONLY); |
eab5fd59 | 1806 | if (fd == -1) { |
e82855d9 JO |
1807 | result->error = g_strdup_printf("failed to open: %s", |
1808 | strerror(errno)); | |
1809 | result->has_error = true; | |
1810 | continue; | |
eab5fd59 PB |
1811 | } |
1812 | ||
e35916ac MT |
1813 | /* We try to cull filesystems we know won't work in advance, but other |
1814 | * filesystems may not implement fstrim for less obvious reasons. | |
1815 | * These will report EOPNOTSUPP; while in some other cases ENOTTY | |
1816 | * will be reported (e.g. CD-ROMs). | |
e82855d9 | 1817 | * Any other error means an unexpected error. |
eab5fd59 | 1818 | */ |
73a652a1 JO |
1819 | r.start = 0; |
1820 | r.len = -1; | |
1821 | r.minlen = has_minimum ? minimum : 0; | |
eab5fd59 PB |
1822 | ret = ioctl(fd, FITRIM, &r); |
1823 | if (ret == -1) { | |
e82855d9 JO |
1824 | result->has_error = true; |
1825 | if (errno == ENOTTY || errno == EOPNOTSUPP) { | |
1826 | result->error = g_strdup("trim not supported"); | |
1827 | } else { | |
1828 | result->error = g_strdup_printf("failed to trim: %s", | |
1829 | strerror(errno)); | |
eab5fd59 | 1830 | } |
e82855d9 JO |
1831 | close(fd); |
1832 | continue; | |
eab5fd59 | 1833 | } |
e82855d9 JO |
1834 | |
1835 | result->has_minimum = true; | |
1836 | result->minimum = r.minlen; | |
1837 | result->has_trimmed = true; | |
1838 | result->trimmed = r.len; | |
eab5fd59 PB |
1839 | close(fd); |
1840 | } | |
1841 | ||
eab5fd59 | 1842 | free_fs_mount_list(&mounts); |
e82855d9 | 1843 | return response; |
eab5fd59 PB |
1844 | } |
1845 | #endif /* CONFIG_FSTRIM */ | |
1846 | ||
1847 | ||
11d0f125 LC |
1848 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
1849 | #define SUSPEND_SUPPORTED 0 | |
1850 | #define SUSPEND_NOT_SUPPORTED 1 | |
1851 | ||
8b020b5e DHB |
1852 | typedef enum { |
1853 | SUSPEND_MODE_DISK = 0, | |
1854 | SUSPEND_MODE_RAM = 1, | |
1855 | SUSPEND_MODE_HYBRID = 2, | |
1856 | } SuspendMode; | |
1857 | ||
1858 | /* | |
1859 | * Executes a command in a child process using g_spawn_sync, | |
1860 | * returning an int >= 0 representing the exit status of the | |
1861 | * process. | |
1862 | * | |
1863 | * If the program wasn't found in path, returns -1. | |
1864 | * | |
1865 | * If a problem happened when creating the child process, | |
1866 | * returns -1 and errp is set. | |
1867 | */ | |
1868 | static int run_process_child(const char *command[], Error **errp) | |
11d0f125 | 1869 | { |
8b020b5e DHB |
1870 | int exit_status, spawn_flag; |
1871 | GError *g_err = NULL; | |
1872 | bool success; | |
1873 | ||
1874 | spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | | |
1875 | G_SPAWN_STDERR_TO_DEV_NULL; | |
11d0f125 | 1876 | |
8b020b5e DHB |
1877 | success = g_spawn_sync(NULL, (char **)command, environ, spawn_flag, |
1878 | NULL, NULL, NULL, NULL, | |
1879 | &exit_status, &g_err); | |
304a0fcb | 1880 | |
8b020b5e DHB |
1881 | if (success) { |
1882 | return WEXITSTATUS(exit_status); | |
304a0fcb DHB |
1883 | } |
1884 | ||
8b020b5e DHB |
1885 | if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { |
1886 | error_setg(errp, "failed to create child process, error '%s'", | |
1887 | g_err->message); | |
a5fcf0e3 | 1888 | } |
11d0f125 | 1889 | |
8b020b5e DHB |
1890 | g_error_free(g_err); |
1891 | return -1; | |
1892 | } | |
1893 | ||
067927d6 DHB |
1894 | static bool systemd_supports_mode(SuspendMode mode, Error **errp) |
1895 | { | |
067927d6 DHB |
1896 | const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", |
1897 | "systemd-hybrid-sleep"}; | |
1898 | const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; | |
1899 | int status; | |
1900 | ||
992861fb | 1901 | status = run_process_child(cmd, errp); |
067927d6 DHB |
1902 | |
1903 | /* | |
1904 | * systemctl status uses LSB return codes so we can expect | |
1905 | * status > 0 and be ok. To assert if the guest has support | |
1906 | * for the selected suspend mode, status should be < 4. 4 is | |
1907 | * the code for unknown service status, the return value when | |
1908 | * the service does not exist. A common value is status = 3 | |
1909 | * (program is not running). | |
1910 | */ | |
1911 | if (status > 0 && status < 4) { | |
1912 | return true; | |
1913 | } | |
1914 | ||
067927d6 DHB |
1915 | return false; |
1916 | } | |
1917 | ||
1918 | static void systemd_suspend(SuspendMode mode, Error **errp) | |
1919 | { | |
1920 | Error *local_err = NULL; | |
1921 | const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; | |
1922 | const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; | |
1923 | int status; | |
1924 | ||
1925 | status = run_process_child(cmd, &local_err); | |
1926 | ||
1927 | if (status == 0) { | |
1928 | return; | |
1929 | } | |
1930 | ||
1931 | if ((status == -1) && !local_err) { | |
1932 | error_setg(errp, "the helper program 'systemctl %s' was not found", | |
1933 | systemctl_args[mode]); | |
1934 | return; | |
1935 | } | |
1936 | ||
1937 | if (local_err) { | |
1938 | error_propagate(errp, local_err); | |
1939 | } else { | |
1940 | error_setg(errp, "the helper program 'systemctl %s' returned an " | |
1941 | "unexpected exit status code (%d)", | |
1942 | systemctl_args[mode], status); | |
1943 | } | |
1944 | } | |
1945 | ||
8b020b5e DHB |
1946 | static bool pmutils_supports_mode(SuspendMode mode, Error **errp) |
1947 | { | |
1948 | Error *local_err = NULL; | |
1949 | const char *pmutils_args[3] = {"--hibernate", "--suspend", | |
1950 | "--suspend-hybrid"}; | |
1951 | const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; | |
1952 | int status; | |
1953 | ||
1954 | status = run_process_child(cmd, &local_err); | |
1955 | ||
1956 | if (status == SUSPEND_SUPPORTED) { | |
1957 | return true; | |
11d0f125 LC |
1958 | } |
1959 | ||
8b020b5e DHB |
1960 | if ((status == -1) && !local_err) { |
1961 | return false; | |
6b26e837 | 1962 | } |
11d0f125 | 1963 | |
8b020b5e DHB |
1964 | if (local_err) { |
1965 | error_propagate(errp, local_err); | |
1966 | } else { | |
77dbc81b | 1967 | error_setg(errp, |
8b020b5e DHB |
1968 | "the helper program '%s' returned an unexpected exit" |
1969 | " status code (%d)", "pm-is-supported", status); | |
11d0f125 LC |
1970 | } |
1971 | ||
8b020b5e | 1972 | return false; |
a5fcf0e3 DHB |
1973 | } |
1974 | ||
8b020b5e | 1975 | static void pmutils_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
1976 | { |
1977 | Error *local_err = NULL; | |
8b020b5e DHB |
1978 | const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", |
1979 | "pm-suspend-hybrid"}; | |
1980 | const char *cmd[2] = {pmutils_binaries[mode], NULL}; | |
246d76eb DHB |
1981 | int status; |
1982 | ||
8b020b5e | 1983 | status = run_process_child(cmd, &local_err); |
246d76eb | 1984 | |
8b020b5e | 1985 | if (status == 0) { |
246d76eb DHB |
1986 | return; |
1987 | } | |
1988 | ||
8b020b5e DHB |
1989 | if ((status == -1) && !local_err) { |
1990 | error_setg(errp, "the helper program '%s' was not found", | |
1991 | pmutils_binaries[mode]); | |
1992 | return; | |
246d76eb DHB |
1993 | } |
1994 | ||
246d76eb DHB |
1995 | if (local_err) { |
1996 | error_propagate(errp, local_err); | |
8b020b5e | 1997 | } else { |
246d76eb | 1998 | error_setg(errp, |
8b020b5e DHB |
1999 | "the helper program '%s' returned an unexpected exit" |
2000 | " status code (%d)", pmutils_binaries[mode], status); | |
246d76eb | 2001 | } |
246d76eb DHB |
2002 | } |
2003 | ||
8b020b5e | 2004 | static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) |
a5fcf0e3 | 2005 | { |
8b020b5e DHB |
2006 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2007 | const char *sysfile_str = sysfile_strs[mode]; | |
a5fcf0e3 DHB |
2008 | char buf[32]; /* hopefully big enough */ |
2009 | int fd; | |
2010 | ssize_t ret; | |
2011 | ||
8b020b5e DHB |
2012 | if (!sysfile_str) { |
2013 | error_setg(errp, "unknown guest suspend mode"); | |
a5fcf0e3 DHB |
2014 | return false; |
2015 | } | |
2016 | ||
2017 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
2018 | if (fd < 0) { | |
2019 | return false; | |
2020 | } | |
2021 | ||
2022 | ret = read(fd, buf, sizeof(buf) - 1); | |
d9c745c1 | 2023 | close(fd); |
a5fcf0e3 DHB |
2024 | if (ret <= 0) { |
2025 | return false; | |
2026 | } | |
2027 | buf[ret] = '\0'; | |
2028 | ||
2029 | if (strstr(buf, sysfile_str)) { | |
2030 | return true; | |
2031 | } | |
2032 | return false; | |
2033 | } | |
2034 | ||
8b020b5e | 2035 | static void linux_sys_state_suspend(SuspendMode mode, Error **errp) |
11d0f125 | 2036 | { |
7b376087 | 2037 | Error *local_err = NULL; |
8b020b5e DHB |
2038 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2039 | const char *sysfile_str = sysfile_strs[mode]; | |
7b376087 | 2040 | pid_t pid; |
dc8764f0 | 2041 | int status; |
11d0f125 | 2042 | |
8b020b5e | 2043 | if (!sysfile_str) { |
304a0fcb DHB |
2044 | error_setg(errp, "unknown guest suspend mode"); |
2045 | return; | |
2046 | } | |
2047 | ||
11d0f125 | 2048 | pid = fork(); |
246d76eb | 2049 | if (!pid) { |
11d0f125 LC |
2050 | /* child */ |
2051 | int fd; | |
2052 | ||
2053 | setsid(); | |
2054 | reopen_fd_to_null(0); | |
2055 | reopen_fd_to_null(1); | |
2056 | reopen_fd_to_null(2); | |
2057 | ||
11d0f125 LC |
2058 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); |
2059 | if (fd < 0) { | |
2060 | _exit(EXIT_FAILURE); | |
2061 | } | |
2062 | ||
2063 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
2064 | _exit(EXIT_FAILURE); | |
2065 | } | |
2066 | ||
2067 | _exit(EXIT_SUCCESS); | |
7b376087 | 2068 | } else if (pid < 0) { |
77dbc81b | 2069 | error_setg_errno(errp, errno, "failed to create child process"); |
246d76eb | 2070 | return; |
11d0f125 LC |
2071 | } |
2072 | ||
7b376087 | 2073 | ga_wait_child(pid, &status, &local_err); |
84d18f06 | 2074 | if (local_err) { |
77dbc81b | 2075 | error_propagate(errp, local_err); |
246d76eb | 2076 | return; |
dc8764f0 LC |
2077 | } |
2078 | ||
7b376087 | 2079 | if (WEXITSTATUS(status)) { |
77dbc81b | 2080 | error_setg(errp, "child process has failed to suspend"); |
11d0f125 | 2081 | } |
dc8764f0 | 2082 | |
246d76eb DHB |
2083 | } |
2084 | ||
8b020b5e | 2085 | static void guest_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
2086 | { |
2087 | Error *local_err = NULL; | |
73e1d8eb | 2088 | bool mode_supported = false; |
246d76eb | 2089 | |
73e1d8eb DHB |
2090 | if (systemd_supports_mode(mode, &local_err)) { |
2091 | mode_supported = true; | |
2092 | systemd_suspend(mode, &local_err); | |
246d76eb DHB |
2093 | } |
2094 | ||
067927d6 DHB |
2095 | if (!local_err) { |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | error_free(local_err); | |
6a4a3853 | 2100 | local_err = NULL; |
067927d6 | 2101 | |
73e1d8eb DHB |
2102 | if (pmutils_supports_mode(mode, &local_err)) { |
2103 | mode_supported = true; | |
2104 | pmutils_suspend(mode, &local_err); | |
2105 | } | |
2106 | ||
246d76eb DHB |
2107 | if (!local_err) { |
2108 | return; | |
2109 | } | |
2110 | ||
2111 | error_free(local_err); | |
6a4a3853 | 2112 | local_err = NULL; |
246d76eb | 2113 | |
73e1d8eb DHB |
2114 | if (linux_sys_state_supports_mode(mode, &local_err)) { |
2115 | mode_supported = true; | |
2116 | linux_sys_state_suspend(mode, &local_err); | |
2117 | } | |
2118 | ||
2119 | if (!mode_supported) { | |
6a4a3853 | 2120 | error_free(local_err); |
73e1d8eb DHB |
2121 | error_setg(errp, |
2122 | "the requested suspend mode is not supported by the guest"); | |
b2322003 | 2123 | } else { |
246d76eb DHB |
2124 | error_propagate(errp, local_err); |
2125 | } | |
11d0f125 LC |
2126 | } |
2127 | ||
77dbc81b | 2128 | void qmp_guest_suspend_disk(Error **errp) |
11d0f125 | 2129 | { |
304a0fcb | 2130 | guest_suspend(SUSPEND_MODE_DISK, errp); |
11d0f125 LC |
2131 | } |
2132 | ||
77dbc81b | 2133 | void qmp_guest_suspend_ram(Error **errp) |
fbf42210 | 2134 | { |
304a0fcb | 2135 | guest_suspend(SUSPEND_MODE_RAM, errp); |
fbf42210 LC |
2136 | } |
2137 | ||
77dbc81b | 2138 | void qmp_guest_suspend_hybrid(Error **errp) |
95f4f404 | 2139 | { |
304a0fcb | 2140 | guest_suspend(SUSPEND_MODE_HYBRID, errp); |
95f4f404 LC |
2141 | } |
2142 | ||
96291f13 | 2143 | static GuestNetworkInterface * |
3424fc9f MP |
2144 | guest_find_interface(GuestNetworkInterfaceList *head, |
2145 | const char *name) | |
2146 | { | |
2147 | for (; head; head = head->next) { | |
2148 | if (strcmp(head->value->name, name) == 0) { | |
96291f13 | 2149 | return head->value; |
3424fc9f MP |
2150 | } |
2151 | } | |
2152 | ||
96291f13 | 2153 | return NULL; |
3424fc9f MP |
2154 | } |
2155 | ||
53f9fcb2 ZL |
2156 | static int guest_get_network_stats(const char *name, |
2157 | GuestNetworkInterfaceStat *stats) | |
2158 | { | |
2159 | int name_len; | |
2160 | char const *devinfo = "/proc/net/dev"; | |
2161 | FILE *fp; | |
2162 | char *line = NULL, *colon; | |
2163 | size_t n = 0; | |
2164 | fp = fopen(devinfo, "r"); | |
2165 | if (!fp) { | |
2166 | return -1; | |
2167 | } | |
2168 | name_len = strlen(name); | |
2169 | while (getline(&line, &n, fp) != -1) { | |
2170 | long long dummy; | |
2171 | long long rx_bytes; | |
2172 | long long rx_packets; | |
2173 | long long rx_errs; | |
2174 | long long rx_dropped; | |
2175 | long long tx_bytes; | |
2176 | long long tx_packets; | |
2177 | long long tx_errs; | |
2178 | long long tx_dropped; | |
2179 | char *trim_line; | |
2180 | trim_line = g_strchug(line); | |
2181 | if (trim_line[0] == '\0') { | |
2182 | continue; | |
2183 | } | |
2184 | colon = strchr(trim_line, ':'); | |
2185 | if (!colon) { | |
2186 | continue; | |
2187 | } | |
2188 | if (colon - name_len == trim_line && | |
2189 | strncmp(trim_line, name, name_len) == 0) { | |
2190 | if (sscanf(colon + 1, | |
2191 | "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld", | |
2192 | &rx_bytes, &rx_packets, &rx_errs, &rx_dropped, | |
2193 | &dummy, &dummy, &dummy, &dummy, | |
2194 | &tx_bytes, &tx_packets, &tx_errs, &tx_dropped, | |
2195 | &dummy, &dummy, &dummy, &dummy) != 16) { | |
2196 | continue; | |
2197 | } | |
2198 | stats->rx_bytes = rx_bytes; | |
2199 | stats->rx_packets = rx_packets; | |
2200 | stats->rx_errs = rx_errs; | |
2201 | stats->rx_dropped = rx_dropped; | |
2202 | stats->tx_bytes = tx_bytes; | |
2203 | stats->tx_packets = tx_packets; | |
2204 | stats->tx_errs = tx_errs; | |
2205 | stats->tx_dropped = tx_dropped; | |
2206 | fclose(fp); | |
2207 | g_free(line); | |
2208 | return 0; | |
2209 | } | |
2210 | } | |
2211 | fclose(fp); | |
2212 | g_free(line); | |
2213 | g_debug("/proc/net/dev: Interface '%s' not found", name); | |
2214 | return -1; | |
2215 | } | |
2216 | ||
3424fc9f MP |
2217 | /* |
2218 | * Build information about guest interfaces | |
2219 | */ | |
2220 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
2221 | { | |
96291f13 | 2222 | GuestNetworkInterfaceList *head = NULL, **tail = &head; |
3424fc9f | 2223 | struct ifaddrs *ifap, *ifa; |
3424fc9f MP |
2224 | |
2225 | if (getifaddrs(&ifap) < 0) { | |
878a0ae0 | 2226 | error_setg_errno(errp, errno, "getifaddrs failed"); |
3424fc9f MP |
2227 | goto error; |
2228 | } | |
2229 | ||
2230 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
96291f13 EB |
2231 | GuestNetworkInterface *info; |
2232 | GuestIpAddressList **address_tail; | |
2233 | GuestIpAddress *address_item = NULL; | |
2234 | GuestNetworkInterfaceStat *interface_stat = NULL; | |
3424fc9f MP |
2235 | char addr4[INET_ADDRSTRLEN]; |
2236 | char addr6[INET6_ADDRSTRLEN]; | |
2237 | int sock; | |
2238 | struct ifreq ifr; | |
2239 | unsigned char *mac_addr; | |
2240 | void *p; | |
2241 | ||
2242 | g_debug("Processing %s interface", ifa->ifa_name); | |
2243 | ||
2244 | info = guest_find_interface(head, ifa->ifa_name); | |
2245 | ||
2246 | if (!info) { | |
2247 | info = g_malloc0(sizeof(*info)); | |
96291f13 | 2248 | info->name = g_strdup(ifa->ifa_name); |
3424fc9f | 2249 | |
96291f13 | 2250 | QAPI_LIST_APPEND(tail, info); |
3424fc9f MP |
2251 | } |
2252 | ||
96291f13 | 2253 | if (!info->has_hardware_address && ifa->ifa_flags & SIOCGIFHWADDR) { |
3424fc9f MP |
2254 | /* we haven't obtained HW address yet */ |
2255 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
2256 | if (sock == -1) { | |
878a0ae0 | 2257 | error_setg_errno(errp, errno, "failed to create socket"); |
3424fc9f MP |
2258 | goto error; |
2259 | } | |
2260 | ||
2261 | memset(&ifr, 0, sizeof(ifr)); | |
96291f13 | 2262 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->name); |
3424fc9f | 2263 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { |
878a0ae0 LC |
2264 | error_setg_errno(errp, errno, |
2265 | "failed to get MAC address of %s", | |
2266 | ifa->ifa_name); | |
10a2158f | 2267 | close(sock); |
3424fc9f MP |
2268 | goto error; |
2269 | } | |
2270 | ||
10a2158f | 2271 | close(sock); |
3424fc9f MP |
2272 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; |
2273 | ||
96291f13 | 2274 | info->hardware_address = |
e4ada482 SW |
2275 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", |
2276 | (int) mac_addr[0], (int) mac_addr[1], | |
2277 | (int) mac_addr[2], (int) mac_addr[3], | |
2278 | (int) mac_addr[4], (int) mac_addr[5]); | |
3424fc9f | 2279 | |
96291f13 | 2280 | info->has_hardware_address = true; |
3424fc9f MP |
2281 | } |
2282 | ||
2283 | if (ifa->ifa_addr && | |
2284 | ifa->ifa_addr->sa_family == AF_INET) { | |
2285 | /* interface with IPv4 address */ | |
3424fc9f MP |
2286 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; |
2287 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
878a0ae0 | 2288 | error_setg_errno(errp, errno, "inet_ntop failed"); |
3424fc9f MP |
2289 | goto error; |
2290 | } | |
2291 | ||
10a2158f | 2292 | address_item = g_malloc0(sizeof(*address_item)); |
96291f13 EB |
2293 | address_item->ip_address = g_strdup(addr4); |
2294 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
3424fc9f MP |
2295 | |
2296 | if (ifa->ifa_netmask) { | |
2297 | /* Count the number of set bits in netmask. | |
2298 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
2299 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
96291f13 | 2300 | address_item->prefix = ctpop32(((uint32_t *) p)[0]); |
3424fc9f MP |
2301 | } |
2302 | } else if (ifa->ifa_addr && | |
2303 | ifa->ifa_addr->sa_family == AF_INET6) { | |
2304 | /* interface with IPv6 address */ | |
3424fc9f MP |
2305 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; |
2306 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
878a0ae0 | 2307 | error_setg_errno(errp, errno, "inet_ntop failed"); |
3424fc9f MP |
2308 | goto error; |
2309 | } | |
2310 | ||
10a2158f | 2311 | address_item = g_malloc0(sizeof(*address_item)); |
96291f13 EB |
2312 | address_item->ip_address = g_strdup(addr6); |
2313 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
3424fc9f MP |
2314 | |
2315 | if (ifa->ifa_netmask) { | |
2316 | /* Count the number of set bits in netmask. | |
2317 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
2318 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
96291f13 | 2319 | address_item->prefix = |
3424fc9f MP |
2320 | ctpop32(((uint32_t *) p)[0]) + |
2321 | ctpop32(((uint32_t *) p)[1]) + | |
2322 | ctpop32(((uint32_t *) p)[2]) + | |
2323 | ctpop32(((uint32_t *) p)[3]); | |
2324 | } | |
2325 | } | |
2326 | ||
2327 | if (!address_item) { | |
2328 | continue; | |
2329 | } | |
2330 | ||
96291f13 EB |
2331 | address_tail = &info->ip_addresses; |
2332 | while (*address_tail) { | |
2333 | address_tail = &(*address_tail)->next; | |
3424fc9f | 2334 | } |
96291f13 | 2335 | QAPI_LIST_APPEND(address_tail, address_item); |
3424fc9f | 2336 | |
96291f13 | 2337 | info->has_ip_addresses = true; |
3424fc9f | 2338 | |
96291f13 | 2339 | if (!info->has_statistics) { |
53f9fcb2 | 2340 | interface_stat = g_malloc0(sizeof(*interface_stat)); |
96291f13 EB |
2341 | if (guest_get_network_stats(info->name, interface_stat) == -1) { |
2342 | info->has_statistics = false; | |
53f9fcb2 ZL |
2343 | g_free(interface_stat); |
2344 | } else { | |
96291f13 EB |
2345 | info->statistics = interface_stat; |
2346 | info->has_statistics = true; | |
53f9fcb2 ZL |
2347 | } |
2348 | } | |
3424fc9f MP |
2349 | } |
2350 | ||
2351 | freeifaddrs(ifap); | |
2352 | return head; | |
2353 | ||
2354 | error: | |
2355 | freeifaddrs(ifap); | |
2356 | qapi_free_GuestNetworkInterfaceList(head); | |
2357 | return NULL; | |
2358 | } | |
2359 | ||
d2baff62 LE |
2360 | /* Transfer online/offline status between @vcpu and the guest system. |
2361 | * | |
2362 | * On input either @errp or *@errp must be NULL. | |
2363 | * | |
2364 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: | |
2365 | * - R: vcpu->logical_id | |
2366 | * - W: vcpu->online | |
2367 | * - W: vcpu->can_offline | |
2368 | * | |
2369 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: | |
2370 | * - R: vcpu->logical_id | |
2371 | * - R: vcpu->online | |
2372 | * | |
2373 | * Written members remain unmodified on error. | |
2374 | */ | |
2375 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, | |
b4bf912a | 2376 | char *dirpath, Error **errp) |
d2baff62 | 2377 | { |
b4bf912a IM |
2378 | int fd; |
2379 | int res; | |
d2baff62 | 2380 | int dirfd; |
b4bf912a | 2381 | static const char fn[] = "online"; |
d2baff62 | 2382 | |
d2baff62 LE |
2383 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
2384 | if (dirfd == -1) { | |
2385 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
b4bf912a IM |
2386 | return; |
2387 | } | |
d2baff62 | 2388 | |
b4bf912a IM |
2389 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); |
2390 | if (fd == -1) { | |
2391 | if (errno != ENOENT) { | |
2392 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); | |
2393 | } else if (sys2vcpu) { | |
2394 | vcpu->online = true; | |
2395 | vcpu->can_offline = false; | |
2396 | } else if (!vcpu->online) { | |
2397 | error_setg(errp, "logical processor #%" PRId64 " can't be " | |
2398 | "offlined", vcpu->logical_id); | |
2399 | } /* otherwise pretend successful re-onlining */ | |
2400 | } else { | |
2401 | unsigned char status; | |
2402 | ||
2403 | res = pread(fd, &status, 1, 0); | |
2404 | if (res == -1) { | |
2405 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); | |
2406 | } else if (res == 0) { | |
2407 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, | |
2408 | fn); | |
2409 | } else if (sys2vcpu) { | |
2410 | vcpu->online = (status != '0'); | |
2411 | vcpu->can_offline = true; | |
2412 | } else if (vcpu->online != (status != '0')) { | |
2413 | status = '0' + vcpu->online; | |
2414 | if (pwrite(fd, &status, 1, 0) == -1) { | |
2415 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, | |
2416 | fn); | |
2417 | } | |
2418 | } /* otherwise pretend successful re-(on|off)-lining */ | |
d2baff62 | 2419 | |
b4bf912a | 2420 | res = close(fd); |
d2baff62 LE |
2421 | g_assert(res == 0); |
2422 | } | |
2423 | ||
b4bf912a IM |
2424 | res = close(dirfd); |
2425 | g_assert(res == 0); | |
d2baff62 LE |
2426 | } |
2427 | ||
2428 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2429 | { | |
c3033fd3 | 2430 | GuestLogicalProcessorList *head, **tail; |
27e7de3c LM |
2431 | const char *cpu_dir = "/sys/devices/system/cpu"; |
2432 | const gchar *line; | |
2433 | g_autoptr(GDir) cpu_gdir = NULL; | |
d2baff62 LE |
2434 | Error *local_err = NULL; |
2435 | ||
d2baff62 | 2436 | head = NULL; |
c3033fd3 | 2437 | tail = &head; |
27e7de3c | 2438 | cpu_gdir = g_dir_open(cpu_dir, 0, NULL); |
d2baff62 | 2439 | |
27e7de3c LM |
2440 | if (cpu_gdir == NULL) { |
2441 | error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); | |
2442 | return NULL; | |
2443 | } | |
b4bf912a | 2444 | |
27e7de3c LM |
2445 | while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { |
2446 | GuestLogicalProcessor *vcpu; | |
2447 | int64_t id; | |
2448 | if (sscanf(line, "cpu%" PRId64, &id)) { | |
2449 | g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" | |
2450 | "cpu%" PRId64 "/", id); | |
b4bf912a IM |
2451 | vcpu = g_malloc0(sizeof *vcpu); |
2452 | vcpu->logical_id = id; | |
2453 | vcpu->has_can_offline = true; /* lolspeak ftw */ | |
2454 | transfer_vcpu(vcpu, true, path, &local_err); | |
c3033fd3 | 2455 | QAPI_LIST_APPEND(tail, vcpu); |
b4bf912a | 2456 | } |
d2baff62 LE |
2457 | } |
2458 | ||
2459 | if (local_err == NULL) { | |
2460 | /* there's no guest with zero VCPUs */ | |
2461 | g_assert(head != NULL); | |
2462 | return head; | |
2463 | } | |
2464 | ||
2465 | qapi_free_GuestLogicalProcessorList(head); | |
2466 | error_propagate(errp, local_err); | |
2467 | return NULL; | |
2468 | } | |
2469 | ||
cbb65fc2 LE |
2470 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
2471 | { | |
2472 | int64_t processed; | |
2473 | Error *local_err = NULL; | |
2474 | ||
2475 | processed = 0; | |
2476 | while (vcpus != NULL) { | |
b4bf912a IM |
2477 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", |
2478 | vcpus->value->logical_id); | |
2479 | ||
2480 | transfer_vcpu(vcpus->value, false, path, &local_err); | |
2481 | g_free(path); | |
cbb65fc2 LE |
2482 | if (local_err != NULL) { |
2483 | break; | |
2484 | } | |
2485 | ++processed; | |
2486 | vcpus = vcpus->next; | |
2487 | } | |
2488 | ||
2489 | if (local_err != NULL) { | |
2490 | if (processed == 0) { | |
2491 | error_propagate(errp, local_err); | |
2492 | } else { | |
2493 | error_free(local_err); | |
2494 | } | |
2495 | } | |
2496 | ||
2497 | return processed; | |
2498 | } | |
2499 | ||
215a2771 DB |
2500 | void qmp_guest_set_user_password(const char *username, |
2501 | const char *password, | |
2502 | bool crypted, | |
2503 | Error **errp) | |
2504 | { | |
2505 | Error *local_err = NULL; | |
2506 | char *passwd_path = NULL; | |
2507 | pid_t pid; | |
2508 | int status; | |
2509 | int datafd[2] = { -1, -1 }; | |
2510 | char *rawpasswddata = NULL; | |
2511 | size_t rawpasswdlen; | |
2512 | char *chpasswddata = NULL; | |
2513 | size_t chpasswdlen; | |
2514 | ||
920639ca DB |
2515 | rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); |
2516 | if (!rawpasswddata) { | |
2517 | return; | |
2518 | } | |
215a2771 DB |
2519 | rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); |
2520 | rawpasswddata[rawpasswdlen] = '\0'; | |
2521 | ||
2522 | if (strchr(rawpasswddata, '\n')) { | |
2523 | error_setg(errp, "forbidden characters in raw password"); | |
2524 | goto out; | |
2525 | } | |
2526 | ||
2527 | if (strchr(username, '\n') || | |
2528 | strchr(username, ':')) { | |
2529 | error_setg(errp, "forbidden characters in username"); | |
2530 | goto out; | |
2531 | } | |
2532 | ||
2533 | chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); | |
2534 | chpasswdlen = strlen(chpasswddata); | |
2535 | ||
2536 | passwd_path = g_find_program_in_path("chpasswd"); | |
2537 | ||
2538 | if (!passwd_path) { | |
2539 | error_setg(errp, "cannot find 'passwd' program in PATH"); | |
2540 | goto out; | |
2541 | } | |
2542 | ||
2543 | if (pipe(datafd) < 0) { | |
2544 | error_setg(errp, "cannot create pipe FDs"); | |
2545 | goto out; | |
2546 | } | |
2547 | ||
2548 | pid = fork(); | |
2549 | if (pid == 0) { | |
2550 | close(datafd[1]); | |
2551 | /* child */ | |
2552 | setsid(); | |
2553 | dup2(datafd[0], 0); | |
2554 | reopen_fd_to_null(1); | |
2555 | reopen_fd_to_null(2); | |
2556 | ||
2557 | if (crypted) { | |
2558 | execle(passwd_path, "chpasswd", "-e", NULL, environ); | |
2559 | } else { | |
2560 | execle(passwd_path, "chpasswd", NULL, environ); | |
2561 | } | |
2562 | _exit(EXIT_FAILURE); | |
2563 | } else if (pid < 0) { | |
2564 | error_setg_errno(errp, errno, "failed to create child process"); | |
2565 | goto out; | |
2566 | } | |
2567 | close(datafd[0]); | |
2568 | datafd[0] = -1; | |
2569 | ||
2570 | if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { | |
2571 | error_setg_errno(errp, errno, "cannot write new account password"); | |
2572 | goto out; | |
2573 | } | |
2574 | close(datafd[1]); | |
2575 | datafd[1] = -1; | |
2576 | ||
2577 | ga_wait_child(pid, &status, &local_err); | |
2578 | if (local_err) { | |
2579 | error_propagate(errp, local_err); | |
2580 | goto out; | |
2581 | } | |
2582 | ||
2583 | if (!WIFEXITED(status)) { | |
2584 | error_setg(errp, "child process has terminated abnormally"); | |
2585 | goto out; | |
2586 | } | |
2587 | ||
2588 | if (WEXITSTATUS(status)) { | |
2589 | error_setg(errp, "child process has failed to set user password"); | |
2590 | goto out; | |
2591 | } | |
2592 | ||
2593 | out: | |
2594 | g_free(chpasswddata); | |
2595 | g_free(rawpasswddata); | |
2596 | g_free(passwd_path); | |
2597 | if (datafd[0] != -1) { | |
2598 | close(datafd[0]); | |
2599 | } | |
2600 | if (datafd[1] != -1) { | |
2601 | close(datafd[1]); | |
2602 | } | |
2603 | } | |
2604 | ||
bd240fca HZ |
2605 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, |
2606 | int size, Error **errp) | |
2607 | { | |
2608 | int fd; | |
2609 | int res; | |
2610 | ||
2611 | errno = 0; | |
2612 | fd = openat(dirfd, pathname, O_RDONLY); | |
2613 | if (fd == -1) { | |
2614 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2615 | return; | |
2616 | } | |
2617 | ||
2618 | res = pread(fd, buf, size, 0); | |
2619 | if (res == -1) { | |
2620 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); | |
2621 | } else if (res == 0) { | |
2622 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); | |
2623 | } | |
2624 | close(fd); | |
2625 | } | |
2626 | ||
2627 | static void ga_write_sysfs_file(int dirfd, const char *pathname, | |
2628 | const char *buf, int size, Error **errp) | |
2629 | { | |
2630 | int fd; | |
2631 | ||
2632 | errno = 0; | |
2633 | fd = openat(dirfd, pathname, O_WRONLY); | |
2634 | if (fd == -1) { | |
2635 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2636 | return; | |
2637 | } | |
2638 | ||
2639 | if (pwrite(fd, buf, size, 0) == -1) { | |
2640 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); | |
2641 | } | |
2642 | ||
2643 | close(fd); | |
2644 | } | |
2645 | ||
2646 | /* Transfer online/offline status between @mem_blk and the guest system. | |
2647 | * | |
2648 | * On input either @errp or *@errp must be NULL. | |
2649 | * | |
2650 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: | |
2651 | * - R: mem_blk->phys_index | |
2652 | * - W: mem_blk->online | |
2653 | * - W: mem_blk->can_offline | |
2654 | * | |
2655 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: | |
2656 | * - R: mem_blk->phys_index | |
2657 | * - R: mem_blk->online | |
2658 | *- R: mem_blk->can_offline | |
2659 | * Written members remain unmodified on error. | |
2660 | */ | |
2661 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, | |
2662 | GuestMemoryBlockResponse *result, | |
2663 | Error **errp) | |
2664 | { | |
2665 | char *dirpath; | |
2666 | int dirfd; | |
2667 | char *status; | |
2668 | Error *local_err = NULL; | |
2669 | ||
2670 | if (!sys2memblk) { | |
2671 | DIR *dp; | |
2672 | ||
2673 | if (!result) { | |
2674 | error_setg(errp, "Internal error, 'result' should not be NULL"); | |
2675 | return; | |
2676 | } | |
2677 | errno = 0; | |
2678 | dp = opendir("/sys/devices/system/memory/"); | |
2679 | /* if there is no 'memory' directory in sysfs, | |
2680 | * we think this VM does not support online/offline memory block, | |
2681 | * any other solution? | |
2682 | */ | |
9879f5ac PMD |
2683 | if (!dp) { |
2684 | if (errno == ENOENT) { | |
2685 | result->response = | |
2686 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2687 | } | |
bd240fca HZ |
2688 | goto out1; |
2689 | } | |
2690 | closedir(dp); | |
2691 | } | |
2692 | ||
2693 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", | |
2694 | mem_blk->phys_index); | |
2695 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2696 | if (dirfd == -1) { | |
2697 | if (sys2memblk) { | |
2698 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2699 | } else { | |
2700 | if (errno == ENOENT) { | |
2701 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; | |
2702 | } else { | |
2703 | result->response = | |
2704 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2705 | } | |
2706 | } | |
2707 | g_free(dirpath); | |
2708 | goto out1; | |
2709 | } | |
2710 | g_free(dirpath); | |
2711 | ||
2712 | status = g_malloc0(10); | |
2713 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); | |
2714 | if (local_err) { | |
2715 | /* treat with sysfs file that not exist in old kernel */ | |
2716 | if (errno == ENOENT) { | |
2717 | error_free(local_err); | |
2718 | if (sys2memblk) { | |
2719 | mem_blk->online = true; | |
2720 | mem_blk->can_offline = false; | |
2721 | } else if (!mem_blk->online) { | |
2722 | result->response = | |
2723 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2724 | } | |
2725 | } else { | |
2726 | if (sys2memblk) { | |
2727 | error_propagate(errp, local_err); | |
2728 | } else { | |
b368123d | 2729 | error_free(local_err); |
bd240fca HZ |
2730 | result->response = |
2731 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2732 | } | |
2733 | } | |
2734 | goto out2; | |
2735 | } | |
2736 | ||
2737 | if (sys2memblk) { | |
2738 | char removable = '0'; | |
2739 | ||
2740 | mem_blk->online = (strncmp(status, "online", 6) == 0); | |
2741 | ||
2742 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); | |
2743 | if (local_err) { | |
67cc32eb | 2744 | /* if no 'removable' file, it doesn't support offline mem blk */ |
bd240fca HZ |
2745 | if (errno == ENOENT) { |
2746 | error_free(local_err); | |
2747 | mem_blk->can_offline = false; | |
2748 | } else { | |
2749 | error_propagate(errp, local_err); | |
2750 | } | |
2751 | } else { | |
2752 | mem_blk->can_offline = (removable != '0'); | |
2753 | } | |
2754 | } else { | |
2755 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { | |
7064024d | 2756 | const char *new_state = mem_blk->online ? "online" : "offline"; |
bd240fca HZ |
2757 | |
2758 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), | |
2759 | &local_err); | |
bd240fca HZ |
2760 | if (local_err) { |
2761 | error_free(local_err); | |
2762 | result->response = | |
2763 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2764 | goto out2; | |
2765 | } | |
2766 | ||
2767 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; | |
2768 | result->has_error_code = false; | |
2769 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2770 | } | |
2771 | g_free(status); | |
2772 | close(dirfd); | |
2773 | return; | |
2774 | ||
2775 | out2: | |
2776 | g_free(status); | |
2777 | close(dirfd); | |
2778 | out1: | |
2779 | if (!sys2memblk) { | |
2780 | result->has_error_code = true; | |
2781 | result->error_code = errno; | |
2782 | } | |
2783 | } | |
2784 | ||
a065aaa9 HZ |
2785 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
2786 | { | |
c3033fd3 | 2787 | GuestMemoryBlockList *head, **tail; |
bd240fca HZ |
2788 | Error *local_err = NULL; |
2789 | struct dirent *de; | |
2790 | DIR *dp; | |
2791 | ||
2792 | head = NULL; | |
c3033fd3 | 2793 | tail = &head; |
bd240fca HZ |
2794 | |
2795 | dp = opendir("/sys/devices/system/memory/"); | |
2796 | if (!dp) { | |
f693fe6e MR |
2797 | /* it's ok if this happens to be a system that doesn't expose |
2798 | * memory blocks via sysfs, but otherwise we should report | |
2799 | * an error | |
2800 | */ | |
2801 | if (errno != ENOENT) { | |
2802 | error_setg_errno(errp, errno, "Can't open directory" | |
9af9e0fe | 2803 | "\"/sys/devices/system/memory/\""); |
f693fe6e | 2804 | } |
bd240fca HZ |
2805 | return NULL; |
2806 | } | |
2807 | ||
2808 | /* Note: the phys_index of memory block may be discontinuous, | |
2809 | * this is because a memblk is the unit of the Sparse Memory design, which | |
2810 | * allows discontinuous memory ranges (ex. NUMA), so here we should | |
2811 | * traverse the memory block directory. | |
2812 | */ | |
2813 | while ((de = readdir(dp)) != NULL) { | |
2814 | GuestMemoryBlock *mem_blk; | |
bd240fca HZ |
2815 | |
2816 | if ((strncmp(de->d_name, "memory", 6) != 0) || | |
2817 | !(de->d_type & DT_DIR)) { | |
2818 | continue; | |
2819 | } | |
2820 | ||
2821 | mem_blk = g_malloc0(sizeof *mem_blk); | |
2822 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ | |
2823 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); | |
2824 | mem_blk->has_can_offline = true; /* lolspeak ftw */ | |
2825 | transfer_memory_block(mem_blk, true, NULL, &local_err); | |
4155c998 MA |
2826 | if (local_err) { |
2827 | break; | |
2828 | } | |
bd240fca | 2829 | |
c3033fd3 | 2830 | QAPI_LIST_APPEND(tail, mem_blk); |
bd240fca HZ |
2831 | } |
2832 | ||
2833 | closedir(dp); | |
2834 | if (local_err == NULL) { | |
2835 | /* there's no guest with zero memory blocks */ | |
2836 | if (head == NULL) { | |
2837 | error_setg(errp, "guest reported zero memory blocks!"); | |
2838 | } | |
2839 | return head; | |
2840 | } | |
2841 | ||
2842 | qapi_free_GuestMemoryBlockList(head); | |
2843 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2844 | return NULL; |
2845 | } | |
2846 | ||
2847 | GuestMemoryBlockResponseList * | |
2848 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2849 | { | |
c3033fd3 | 2850 | GuestMemoryBlockResponseList *head, **tail; |
32ca7927 HZ |
2851 | Error *local_err = NULL; |
2852 | ||
2853 | head = NULL; | |
c3033fd3 | 2854 | tail = &head; |
32ca7927 HZ |
2855 | |
2856 | while (mem_blks != NULL) { | |
2857 | GuestMemoryBlockResponse *result; | |
32ca7927 HZ |
2858 | GuestMemoryBlock *current_mem_blk = mem_blks->value; |
2859 | ||
2860 | result = g_malloc0(sizeof(*result)); | |
2861 | result->phys_index = current_mem_blk->phys_index; | |
2862 | transfer_memory_block(current_mem_blk, false, result, &local_err); | |
2863 | if (local_err) { /* should never happen */ | |
2864 | goto err; | |
2865 | } | |
32ca7927 | 2866 | |
c3033fd3 | 2867 | QAPI_LIST_APPEND(tail, result); |
32ca7927 HZ |
2868 | mem_blks = mem_blks->next; |
2869 | } | |
2870 | ||
2871 | return head; | |
2872 | err: | |
2873 | qapi_free_GuestMemoryBlockResponseList(head); | |
2874 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2875 | return NULL; |
2876 | } | |
2877 | ||
2878 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2879 | { | |
ef82b60b HZ |
2880 | Error *local_err = NULL; |
2881 | char *dirpath; | |
2882 | int dirfd; | |
2883 | char *buf; | |
2884 | GuestMemoryBlockInfo *info; | |
2885 | ||
2886 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); | |
2887 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2888 | if (dirfd == -1) { | |
2889 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2890 | g_free(dirpath); | |
2891 | return NULL; | |
2892 | } | |
2893 | g_free(dirpath); | |
2894 | ||
2895 | buf = g_malloc0(20); | |
2896 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); | |
8ce1ee46 | 2897 | close(dirfd); |
ef82b60b HZ |
2898 | if (local_err) { |
2899 | g_free(buf); | |
2900 | error_propagate(errp, local_err); | |
2901 | return NULL; | |
2902 | } | |
2903 | ||
2904 | info = g_new0(GuestMemoryBlockInfo, 1); | |
2905 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ | |
2906 | ||
2907 | g_free(buf); | |
2908 | ||
2909 | return info; | |
a065aaa9 HZ |
2910 | } |
2911 | ||
e72c3f2e MR |
2912 | #else /* defined(__linux__) */ |
2913 | ||
77dbc81b | 2914 | void qmp_guest_suspend_disk(Error **errp) |
e72c3f2e | 2915 | { |
c6bd8c70 | 2916 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2917 | } |
2918 | ||
77dbc81b | 2919 | void qmp_guest_suspend_ram(Error **errp) |
e72c3f2e | 2920 | { |
c6bd8c70 | 2921 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2922 | } |
2923 | ||
77dbc81b | 2924 | void qmp_guest_suspend_hybrid(Error **errp) |
e72c3f2e | 2925 | { |
c6bd8c70 | 2926 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2927 | } |
2928 | ||
d35d4cb5 | 2929 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) |
e72c3f2e | 2930 | { |
c6bd8c70 | 2931 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 | 2932 | return NULL; |
e72c3f2e MR |
2933 | } |
2934 | ||
d2baff62 LE |
2935 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
2936 | { | |
c6bd8c70 | 2937 | error_setg(errp, QERR_UNSUPPORTED); |
d2baff62 LE |
2938 | return NULL; |
2939 | } | |
2940 | ||
cbb65fc2 LE |
2941 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
2942 | { | |
c6bd8c70 | 2943 | error_setg(errp, QERR_UNSUPPORTED); |
cbb65fc2 LE |
2944 | return -1; |
2945 | } | |
2946 | ||
215a2771 DB |
2947 | void qmp_guest_set_user_password(const char *username, |
2948 | const char *password, | |
2949 | bool crypted, | |
2950 | Error **errp) | |
2951 | { | |
c6bd8c70 | 2952 | error_setg(errp, QERR_UNSUPPORTED); |
215a2771 DB |
2953 | } |
2954 | ||
a065aaa9 HZ |
2955 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
2956 | { | |
c6bd8c70 | 2957 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
2958 | return NULL; |
2959 | } | |
2960 | ||
2961 | GuestMemoryBlockResponseList * | |
2962 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2963 | { | |
c6bd8c70 | 2964 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
2965 | return NULL; |
2966 | } | |
2967 | ||
2968 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2969 | { | |
c6bd8c70 | 2970 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
2971 | return NULL; |
2972 | } | |
2973 | ||
d35d4cb5 MR |
2974 | #endif |
2975 | ||
2976 | #if !defined(CONFIG_FSFREEZE) | |
2977 | ||
46d4c572 TS |
2978 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) |
2979 | { | |
c6bd8c70 | 2980 | error_setg(errp, QERR_UNSUPPORTED); |
46d4c572 TS |
2981 | return NULL; |
2982 | } | |
2983 | ||
77dbc81b | 2984 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e72c3f2e | 2985 | { |
c6bd8c70 | 2986 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
2987 | |
2988 | return 0; | |
e72c3f2e MR |
2989 | } |
2990 | ||
77dbc81b | 2991 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
e72c3f2e | 2992 | { |
c6bd8c70 | 2993 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
2994 | |
2995 | return 0; | |
e72c3f2e MR |
2996 | } |
2997 | ||
e99bce20 TS |
2998 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
2999 | strList *mountpoints, | |
3000 | Error **errp) | |
3001 | { | |
c6bd8c70 | 3002 | error_setg(errp, QERR_UNSUPPORTED); |
e99bce20 TS |
3003 | |
3004 | return 0; | |
3005 | } | |
3006 | ||
77dbc81b | 3007 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e72c3f2e | 3008 | { |
c6bd8c70 | 3009 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3010 | |
3011 | return 0; | |
e72c3f2e | 3012 | } |
fed39564 TG |
3013 | |
3014 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
3015 | { | |
3016 | error_setg(errp, QERR_UNSUPPORTED); | |
3017 | return NULL; | |
3018 | } | |
3019 | ||
eab5fd59 PB |
3020 | #endif /* CONFIG_FSFREEZE */ |
3021 | ||
3022 | #if !defined(CONFIG_FSTRIM) | |
e82855d9 JO |
3023 | GuestFilesystemTrimResponse * |
3024 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 3025 | { |
c6bd8c70 | 3026 | error_setg(errp, QERR_UNSUPPORTED); |
e82855d9 | 3027 | return NULL; |
eab5fd59 | 3028 | } |
e72c3f2e MR |
3029 | #endif |
3030 | ||
1281c08a TS |
3031 | /* add unsupported commands to the blacklist */ |
3032 | GList *ga_command_blacklist_init(GList *blacklist) | |
3033 | { | |
3034 | #if !defined(__linux__) | |
3035 | { | |
3036 | const char *list[] = { | |
3037 | "guest-suspend-disk", "guest-suspend-ram", | |
3038 | "guest-suspend-hybrid", "guest-network-get-interfaces", | |
0dd38a03 HZ |
3039 | "guest-get-vcpus", "guest-set-vcpus", |
3040 | "guest-get-memory-blocks", "guest-set-memory-blocks", | |
28d8dd35 BS |
3041 | "guest-get-memory-block-size", "guest-get-memory-block-info", |
3042 | NULL}; | |
1281c08a TS |
3043 | char **p = (char **)list; |
3044 | ||
3045 | while (*p) { | |
4bca81ce | 3046 | blacklist = g_list_append(blacklist, g_strdup(*p++)); |
1281c08a TS |
3047 | } |
3048 | } | |
3049 | #endif | |
3050 | ||
3051 | #if !defined(CONFIG_FSFREEZE) | |
3052 | { | |
3053 | const char *list[] = { | |
3054 | "guest-get-fsinfo", "guest-fsfreeze-status", | |
3055 | "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", | |
fed39564 TG |
3056 | "guest-fsfreeze-thaw", "guest-get-fsinfo", |
3057 | "guest-get-disks", NULL}; | |
1281c08a TS |
3058 | char **p = (char **)list; |
3059 | ||
3060 | while (*p) { | |
4bca81ce | 3061 | blacklist = g_list_append(blacklist, g_strdup(*p++)); |
1281c08a TS |
3062 | } |
3063 | } | |
3064 | #endif | |
3065 | ||
3066 | #if !defined(CONFIG_FSTRIM) | |
4bca81ce | 3067 | blacklist = g_list_append(blacklist, g_strdup("guest-fstrim")); |
1281c08a TS |
3068 | #endif |
3069 | ||
2e4211ce TG |
3070 | blacklist = g_list_append(blacklist, g_strdup("guest-get-devices")); |
3071 | ||
1281c08a TS |
3072 | return blacklist; |
3073 | } | |
3074 | ||
e3d4d252 MR |
3075 | /* register init/cleanup routines for stateful command groups */ |
3076 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
3077 | { | |
7006b9cf | 3078 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 3079 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 3080 | #endif |
e3d4d252 | 3081 | } |
161a56a9 | 3082 | |
e674605f TG |
3083 | #ifdef HAVE_UTMPX |
3084 | ||
161a56a9 VF |
3085 | #define QGA_MICRO_SECOND_TO_SECOND 1000000 |
3086 | ||
3087 | static double ga_get_login_time(struct utmpx *user_info) | |
3088 | { | |
3089 | double seconds = (double)user_info->ut_tv.tv_sec; | |
3090 | double useconds = (double)user_info->ut_tv.tv_usec; | |
3091 | useconds /= QGA_MICRO_SECOND_TO_SECOND; | |
3092 | return seconds + useconds; | |
3093 | } | |
3094 | ||
b90abbac | 3095 | GuestUserList *qmp_guest_get_users(Error **errp) |
161a56a9 VF |
3096 | { |
3097 | GHashTable *cache = NULL; | |
95b3a8c8 | 3098 | GuestUserList *head = NULL, **tail = &head; |
161a56a9 VF |
3099 | struct utmpx *user_info = NULL; |
3100 | gpointer value = NULL; | |
3101 | GuestUser *user = NULL; | |
161a56a9 VF |
3102 | double login_time = 0; |
3103 | ||
3104 | cache = g_hash_table_new(g_str_hash, g_str_equal); | |
3105 | setutxent(); | |
3106 | ||
3107 | for (;;) { | |
3108 | user_info = getutxent(); | |
3109 | if (user_info == NULL) { | |
3110 | break; | |
3111 | } else if (user_info->ut_type != USER_PROCESS) { | |
3112 | continue; | |
3113 | } else if (g_hash_table_contains(cache, user_info->ut_user)) { | |
3114 | value = g_hash_table_lookup(cache, user_info->ut_user); | |
3115 | user = (GuestUser *)value; | |
3116 | login_time = ga_get_login_time(user_info); | |
3117 | /* We're ensuring the earliest login time to be sent */ | |
3118 | if (login_time < user->login_time) { | |
3119 | user->login_time = login_time; | |
3120 | } | |
3121 | continue; | |
3122 | } | |
3123 | ||
95b3a8c8 EB |
3124 | user = g_new0(GuestUser, 1); |
3125 | user->user = g_strdup(user_info->ut_user); | |
3126 | user->login_time = ga_get_login_time(user_info); | |
161a56a9 | 3127 | |
95b3a8c8 | 3128 | g_hash_table_insert(cache, user->user, user); |
161a56a9 | 3129 | |
95b3a8c8 | 3130 | QAPI_LIST_APPEND(tail, user); |
161a56a9 VF |
3131 | } |
3132 | endutxent(); | |
3133 | g_hash_table_destroy(cache); | |
3134 | return head; | |
3135 | } | |
e674605f TG |
3136 | |
3137 | #else | |
3138 | ||
3139 | GuestUserList *qmp_guest_get_users(Error **errp) | |
3140 | { | |
3141 | error_setg(errp, QERR_UNSUPPORTED); | |
3142 | return NULL; | |
3143 | } | |
3144 | ||
3145 | #endif | |
9848f797 TG |
3146 | |
3147 | /* Replace escaped special characters with theire real values. The replacement | |
3148 | * is done in place -- returned value is in the original string. | |
3149 | */ | |
3150 | static void ga_osrelease_replace_special(gchar *value) | |
3151 | { | |
3152 | gchar *p, *p2, quote; | |
3153 | ||
3154 | /* Trim the string at first space or semicolon if it is not enclosed in | |
3155 | * single or double quotes. */ | |
3156 | if ((value[0] != '"') || (value[0] == '\'')) { | |
3157 | p = strchr(value, ' '); | |
3158 | if (p != NULL) { | |
3159 | *p = 0; | |
3160 | } | |
3161 | p = strchr(value, ';'); | |
3162 | if (p != NULL) { | |
3163 | *p = 0; | |
3164 | } | |
3165 | return; | |
3166 | } | |
3167 | ||
3168 | quote = value[0]; | |
3169 | p2 = value; | |
3170 | p = value + 1; | |
3171 | while (*p != 0) { | |
3172 | if (*p == '\\') { | |
3173 | p++; | |
3174 | switch (*p) { | |
3175 | case '$': | |
3176 | case '\'': | |
3177 | case '"': | |
3178 | case '\\': | |
3179 | case '`': | |
3180 | break; | |
3181 | default: | |
3182 | /* Keep literal backslash followed by whatever is there */ | |
3183 | p--; | |
3184 | break; | |
3185 | } | |
3186 | } else if (*p == quote) { | |
3187 | *p2 = 0; | |
3188 | break; | |
3189 | } | |
3190 | *(p2++) = *(p++); | |
3191 | } | |
3192 | } | |
3193 | ||
3194 | static GKeyFile *ga_parse_osrelease(const char *fname) | |
3195 | { | |
3196 | gchar *content = NULL; | |
3197 | gchar *content2 = NULL; | |
3198 | GError *err = NULL; | |
3199 | GKeyFile *keys = g_key_file_new(); | |
3200 | const char *group = "[os-release]\n"; | |
3201 | ||
3202 | if (!g_file_get_contents(fname, &content, NULL, &err)) { | |
3203 | slog("failed to read '%s', error: %s", fname, err->message); | |
3204 | goto fail; | |
3205 | } | |
3206 | ||
3207 | if (!g_utf8_validate(content, -1, NULL)) { | |
3208 | slog("file is not utf-8 encoded: %s", fname); | |
3209 | goto fail; | |
3210 | } | |
3211 | content2 = g_strdup_printf("%s%s", group, content); | |
3212 | ||
3213 | if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE, | |
3214 | &err)) { | |
3215 | slog("failed to parse file '%s', error: %s", fname, err->message); | |
3216 | goto fail; | |
3217 | } | |
3218 | ||
3219 | g_free(content); | |
3220 | g_free(content2); | |
3221 | return keys; | |
3222 | ||
3223 | fail: | |
3224 | g_error_free(err); | |
3225 | g_free(content); | |
3226 | g_free(content2); | |
3227 | g_key_file_free(keys); | |
3228 | return NULL; | |
3229 | } | |
3230 | ||
3231 | GuestOSInfo *qmp_guest_get_osinfo(Error **errp) | |
3232 | { | |
3233 | GuestOSInfo *info = NULL; | |
3234 | struct utsname kinfo; | |
339ca68b TG |
3235 | GKeyFile *osrelease = NULL; |
3236 | const char *qga_os_release = g_getenv("QGA_OS_RELEASE"); | |
9848f797 TG |
3237 | |
3238 | info = g_new0(GuestOSInfo, 1); | |
3239 | ||
3240 | if (uname(&kinfo) != 0) { | |
3241 | error_setg_errno(errp, errno, "uname failed"); | |
3242 | } else { | |
3243 | info->has_kernel_version = true; | |
3244 | info->kernel_version = g_strdup(kinfo.version); | |
3245 | info->has_kernel_release = true; | |
3246 | info->kernel_release = g_strdup(kinfo.release); | |
3247 | info->has_machine = true; | |
3248 | info->machine = g_strdup(kinfo.machine); | |
3249 | } | |
3250 | ||
339ca68b TG |
3251 | if (qga_os_release != NULL) { |
3252 | osrelease = ga_parse_osrelease(qga_os_release); | |
3253 | } else { | |
3254 | osrelease = ga_parse_osrelease("/etc/os-release"); | |
3255 | if (osrelease == NULL) { | |
3256 | osrelease = ga_parse_osrelease("/usr/lib/os-release"); | |
3257 | } | |
9848f797 TG |
3258 | } |
3259 | ||
3260 | if (osrelease != NULL) { | |
3261 | char *value; | |
3262 | ||
3263 | #define GET_FIELD(field, osfield) do { \ | |
3264 | value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \ | |
3265 | if (value != NULL) { \ | |
3266 | ga_osrelease_replace_special(value); \ | |
3267 | info->has_ ## field = true; \ | |
3268 | info->field = value; \ | |
3269 | } \ | |
3270 | } while (0) | |
3271 | GET_FIELD(id, "ID"); | |
3272 | GET_FIELD(name, "NAME"); | |
3273 | GET_FIELD(pretty_name, "PRETTY_NAME"); | |
3274 | GET_FIELD(version, "VERSION"); | |
3275 | GET_FIELD(version_id, "VERSION_ID"); | |
3276 | GET_FIELD(variant, "VARIANT"); | |
3277 | GET_FIELD(variant_id, "VARIANT_ID"); | |
3278 | #undef GET_FIELD | |
3279 | ||
3280 | g_key_file_free(osrelease); | |
3281 | } | |
3282 | ||
3283 | return info; | |
3284 | } | |
2e4211ce TG |
3285 | |
3286 | GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) | |
3287 | { | |
3288 | error_setg(errp, QERR_UNSUPPORTED); | |
3289 | ||
3290 | return NULL; | |
3291 | } |