]>
Commit | Line | Data |
---|---|---|
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> |
dc03272d | 19 | #include "guest-agent-core.h" |
eb815e24 | 20 | #include "qga-qapi-commands.h" |
e688df6b | 21 | #include "qapi/error.h" |
7b1b5d19 | 22 | #include "qapi/qmp/qerror.h" |
1de7afc9 PB |
23 | #include "qemu/queue.h" |
24 | #include "qemu/host-utils.h" | |
12505396 | 25 | #include "qemu/sockets.h" |
920639ca | 26 | #include "qemu/base64.h" |
f348b6d1 | 27 | #include "qemu/cutils.h" |
5d3586b8 | 28 | #include "commands-common.h" |
22668881 | 29 | #include "block/nvme.h" |
1a89a17b | 30 | #include "cutils.h" |
4eb36d40 | 31 | |
e674605f TG |
32 | #ifdef HAVE_UTMPX |
33 | #include <utmpx.h> | |
34 | #endif | |
35 | ||
4eb36d40 | 36 | #if defined(__linux__) |
e3d4d252 | 37 | #include <mntent.h> |
7006b9cf | 38 | #include <linux/fs.h> |
25b5ff1a | 39 | #include <sys/statvfs.h> |
22668881 | 40 | #include <linux/nvme_ioctl.h> |
e3d4d252 | 41 | |
b616105a TG |
42 | #ifdef CONFIG_LIBUDEV |
43 | #include <libudev.h> | |
44 | #endif | |
45 | ||
eab5fd59 | 46 | #ifdef FIFREEZE |
e72c3f2e MR |
47 | #define CONFIG_FSFREEZE |
48 | #endif | |
eab5fd59 PB |
49 | #ifdef FITRIM |
50 | #define CONFIG_FSTRIM | |
51 | #endif | |
e72c3f2e MR |
52 | #endif |
53 | ||
59e35c7b AD |
54 | #ifdef HAVE_GETIFADDRS |
55 | #include <arpa/inet.h> | |
56 | #include <sys/socket.h> | |
57 | #include <net/if.h> | |
58 | #include <sys/types.h> | |
59 | #include <ifaddrs.h> | |
60 | #ifdef CONFIG_SOLARIS | |
61 | #include <sys/sockio.h> | |
62 | #endif | |
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 | 90 | |
c8ec041d AD |
91 | #ifdef CONFIG_SOLARIS |
92 | const char *powerdown_flag = "-i5"; | |
93 | const char *halt_flag = "-i0"; | |
94 | const char *reboot_flag = "-i6"; | |
95 | #else | |
96 | const char *powerdown_flag = "-P"; | |
97 | const char *halt_flag = "-H"; | |
98 | const char *reboot_flag = "-r"; | |
99 | #endif | |
100 | ||
e3d4d252 MR |
101 | slog("guest-shutdown called, mode: %s", mode); |
102 | if (!has_mode || strcmp(mode, "powerdown") == 0) { | |
c8ec041d | 103 | shutdown_flag = powerdown_flag; |
e3d4d252 | 104 | } else if (strcmp(mode, "halt") == 0) { |
c8ec041d | 105 | shutdown_flag = halt_flag; |
e3d4d252 | 106 | } else if (strcmp(mode, "reboot") == 0) { |
c8ec041d | 107 | shutdown_flag = reboot_flag; |
e3d4d252 | 108 | } else { |
77dbc81b | 109 | error_setg(errp, |
d220a6df | 110 | "mode is invalid (valid values are: halt|powerdown|reboot"); |
e3d4d252 MR |
111 | return; |
112 | } | |
113 | ||
d5dd3498 LC |
114 | pid = fork(); |
115 | if (pid == 0) { | |
e3d4d252 MR |
116 | /* child, start the shutdown */ |
117 | setsid(); | |
3674838c LC |
118 | reopen_fd_to_null(0); |
119 | reopen_fd_to_null(1); | |
120 | reopen_fd_to_null(2); | |
e3d4d252 | 121 | |
c8ec041d AD |
122 | #ifdef CONFIG_SOLARIS |
123 | execl("/sbin/shutdown", "shutdown", shutdown_flag, "-g0", "-y", | |
124 | "hypervisor initiated shutdown", (char *)NULL); | |
125 | #else | |
fcc41961 MAL |
126 | execl("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", |
127 | "hypervisor initiated shutdown", (char *)NULL); | |
c8ec041d | 128 | #endif |
3674838c | 129 | _exit(EXIT_FAILURE); |
d5dd3498 | 130 | } else if (pid < 0) { |
77dbc81b | 131 | error_setg_errno(errp, errno, "failed to create child process"); |
d220a6df | 132 | return; |
e3d4d252 | 133 | } |
d5dd3498 | 134 | |
d220a6df | 135 | ga_wait_child(pid, &status, &local_err); |
84d18f06 | 136 | if (local_err) { |
77dbc81b | 137 | error_propagate(errp, local_err); |
d220a6df LC |
138 | return; |
139 | } | |
140 | ||
141 | if (!WIFEXITED(status)) { | |
77dbc81b | 142 | error_setg(errp, "child process has terminated abnormally"); |
d220a6df LC |
143 | return; |
144 | } | |
145 | ||
146 | if (WEXITSTATUS(status)) { | |
77dbc81b | 147 | error_setg(errp, "child process has failed to shutdown"); |
d5dd3498 LC |
148 | return; |
149 | } | |
150 | ||
085d8134 | 151 | /* succeeded */ |
e3d4d252 MR |
152 | } |
153 | ||
2c958923 | 154 | void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) |
a1bca57f LL |
155 | { |
156 | int ret; | |
157 | int status; | |
158 | pid_t pid; | |
159 | Error *local_err = NULL; | |
160 | struct timeval tv; | |
5c6096e5 CH |
161 | static const char hwclock_path[] = "/sbin/hwclock"; |
162 | static int hwclock_available = -1; | |
163 | ||
164 | if (hwclock_available < 0) { | |
165 | hwclock_available = (access(hwclock_path, X_OK) == 0); | |
166 | } | |
167 | ||
168 | if (!hwclock_available) { | |
169 | error_setg(errp, QERR_UNSUPPORTED); | |
170 | return; | |
171 | } | |
a1bca57f | 172 | |
2c958923 MP |
173 | /* If user has passed a time, validate and set it. */ |
174 | if (has_time) { | |
00d2f370 MAL |
175 | GDate date = { 0, }; |
176 | ||
2c958923 MP |
177 | /* year-2038 will overflow in case time_t is 32bit */ |
178 | if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { | |
179 | error_setg(errp, "Time %" PRId64 " is too large", time_ns); | |
180 | return; | |
181 | } | |
182 | ||
183 | tv.tv_sec = time_ns / 1000000000; | |
184 | tv.tv_usec = (time_ns % 1000000000) / 1000; | |
00d2f370 MAL |
185 | g_date_set_time_t(&date, tv.tv_sec); |
186 | if (date.year < 1970 || date.year >= 2070) { | |
187 | error_setg_errno(errp, errno, "Invalid time"); | |
188 | return; | |
189 | } | |
2c958923 MP |
190 | |
191 | ret = settimeofday(&tv, NULL); | |
192 | if (ret < 0) { | |
193 | error_setg_errno(errp, errno, "Failed to set time to guest"); | |
194 | return; | |
195 | } | |
a1bca57f LL |
196 | } |
197 | ||
2c958923 MP |
198 | /* Now, if user has passed a time to set and the system time is set, we |
199 | * just need to synchronize the hardware clock. However, if no time was | |
200 | * passed, user is requesting the opposite: set the system time from the | |
1634df56 | 201 | * hardware clock (RTC). */ |
a1bca57f LL |
202 | pid = fork(); |
203 | if (pid == 0) { | |
204 | setsid(); | |
205 | reopen_fd_to_null(0); | |
206 | reopen_fd_to_null(1); | |
207 | reopen_fd_to_null(2); | |
208 | ||
2c958923 MP |
209 | /* Use '/sbin/hwclock -w' to set RTC from the system time, |
210 | * or '/sbin/hwclock -s' to set the system time from RTC. */ | |
fcc41961 | 211 | execl(hwclock_path, "hwclock", has_time ? "-w" : "-s", NULL); |
a1bca57f LL |
212 | _exit(EXIT_FAILURE); |
213 | } else if (pid < 0) { | |
214 | error_setg_errno(errp, errno, "failed to create child process"); | |
215 | return; | |
216 | } | |
217 | ||
218 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 219 | if (local_err) { |
a1bca57f LL |
220 | error_propagate(errp, local_err); |
221 | return; | |
222 | } | |
223 | ||
224 | if (!WIFEXITED(status)) { | |
225 | error_setg(errp, "child process has terminated abnormally"); | |
226 | return; | |
227 | } | |
228 | ||
229 | if (WEXITSTATUS(status)) { | |
230 | error_setg(errp, "hwclock failed to set hardware clock to system time"); | |
231 | return; | |
232 | } | |
233 | } | |
234 | ||
895b00f6 MAL |
235 | typedef enum { |
236 | RW_STATE_NEW, | |
237 | RW_STATE_READING, | |
238 | RW_STATE_WRITING, | |
239 | } RwState; | |
240 | ||
5d3586b8 | 241 | struct GuestFileHandle { |
e3d4d252 MR |
242 | uint64_t id; |
243 | FILE *fh; | |
895b00f6 | 244 | RwState state; |
e3d4d252 | 245 | QTAILQ_ENTRY(GuestFileHandle) next; |
5d3586b8 | 246 | }; |
e3d4d252 MR |
247 | |
248 | static struct { | |
249 | QTAILQ_HEAD(, GuestFileHandle) filehandles; | |
b4fe97c8 DL |
250 | } guest_file_state = { |
251 | .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), | |
252 | }; | |
e3d4d252 | 253 | |
39097daf | 254 | static int64_t guest_file_handle_add(FILE *fh, Error **errp) |
e3d4d252 MR |
255 | { |
256 | GuestFileHandle *gfh; | |
39097daf MR |
257 | int64_t handle; |
258 | ||
259 | handle = ga_get_fd_handle(ga_state, errp); | |
a903f40c MA |
260 | if (handle < 0) { |
261 | return -1; | |
39097daf | 262 | } |
e3d4d252 | 263 | |
f3a06403 | 264 | gfh = g_new0(GuestFileHandle, 1); |
39097daf | 265 | gfh->id = handle; |
e3d4d252 MR |
266 | gfh->fh = fh; |
267 | QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); | |
39097daf MR |
268 | |
269 | return handle; | |
e3d4d252 MR |
270 | } |
271 | ||
5d3586b8 | 272 | GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) |
e3d4d252 MR |
273 | { |
274 | GuestFileHandle *gfh; | |
275 | ||
276 | QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) | |
277 | { | |
278 | if (gfh->id == id) { | |
279 | return gfh; | |
280 | } | |
281 | } | |
282 | ||
77dbc81b | 283 | error_setg(errp, "handle '%" PRId64 "' has not been found", id); |
e3d4d252 MR |
284 | return NULL; |
285 | } | |
286 | ||
c689b4f1 LE |
287 | typedef const char * const ccpc; |
288 | ||
8fe6bbca LE |
289 | #ifndef O_BINARY |
290 | #define O_BINARY 0 | |
291 | #endif | |
292 | ||
c689b4f1 LE |
293 | /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ |
294 | static const struct { | |
295 | ccpc *forms; | |
296 | int oflag_base; | |
297 | } guest_file_open_modes[] = { | |
8fe6bbca LE |
298 | { (ccpc[]){ "r", NULL }, O_RDONLY }, |
299 | { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, | |
300 | { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, | |
301 | { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, | |
302 | { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, | |
303 | { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, | |
304 | { (ccpc[]){ "r+", NULL }, O_RDWR }, | |
305 | { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, | |
306 | { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, | |
307 | { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, | |
308 | { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, | |
309 | { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } | |
c689b4f1 LE |
310 | }; |
311 | ||
312 | static int | |
77dbc81b | 313 | find_open_flag(const char *mode_str, Error **errp) |
c689b4f1 LE |
314 | { |
315 | unsigned mode; | |
316 | ||
317 | for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { | |
318 | ccpc *form; | |
319 | ||
320 | form = guest_file_open_modes[mode].forms; | |
321 | while (*form != NULL && strcmp(*form, mode_str) != 0) { | |
322 | ++form; | |
323 | } | |
324 | if (*form != NULL) { | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | if (mode == ARRAY_SIZE(guest_file_open_modes)) { | |
77dbc81b | 330 | error_setg(errp, "invalid file open mode '%s'", mode_str); |
c689b4f1 LE |
331 | return -1; |
332 | } | |
333 | return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; | |
334 | } | |
335 | ||
336 | #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ | |
337 | S_IRGRP | S_IWGRP | \ | |
338 | S_IROTH | S_IWOTH) | |
339 | ||
340 | static FILE * | |
77dbc81b | 341 | safe_open_or_create(const char *path, const char *mode, Error **errp) |
c689b4f1 | 342 | { |
c689b4f1 | 343 | int oflag; |
69f56c14 MAL |
344 | int fd = -1; |
345 | FILE *f = NULL; | |
c689b4f1 | 346 | |
69f56c14 MAL |
347 | oflag = find_open_flag(mode, errp); |
348 | if (oflag < 0) { | |
349 | goto end; | |
350 | } | |
c689b4f1 | 351 | |
69f56c14 MAL |
352 | /* If the caller wants / allows creation of a new file, we implement it |
353 | * with a two step process: open() + (open() / fchmod()). | |
354 | * | |
355 | * First we insist on creating the file exclusively as a new file. If | |
356 | * that succeeds, we're free to set any file-mode bits on it. (The | |
357 | * motivation is that we want to set those file-mode bits independently | |
358 | * of the current umask.) | |
359 | * | |
360 | * If the exclusive creation fails because the file already exists | |
361 | * (EEXIST is not possible for any other reason), we just attempt to | |
362 | * open the file, but in this case we won't be allowed to change the | |
363 | * file-mode bits on the preexistent file. | |
364 | * | |
365 | * The pathname should never disappear between the two open()s in | |
366 | * practice. If it happens, then someone very likely tried to race us. | |
367 | * In this case just go ahead and report the ENOENT from the second | |
368 | * open() to the caller. | |
369 | * | |
370 | * If the caller wants to open a preexistent file, then the first | |
371 | * open() is decisive and its third argument is ignored, and the second | |
372 | * open() and the fchmod() are never called. | |
373 | */ | |
1a89a17b | 374 | fd = qga_open_cloexec(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); |
69f56c14 MAL |
375 | if (fd == -1 && errno == EEXIST) { |
376 | oflag &= ~(unsigned)O_CREAT; | |
1a89a17b | 377 | fd = qga_open_cloexec(path, oflag, 0); |
69f56c14 MAL |
378 | } |
379 | if (fd == -1) { | |
380 | error_setg_errno(errp, errno, | |
381 | "failed to open file '%s' (mode: '%s')", | |
382 | path, mode); | |
383 | goto end; | |
c689b4f1 LE |
384 | } |
385 | ||
69f56c14 MAL |
386 | if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { |
387 | error_setg_errno(errp, errno, "failed to set permission " | |
388 | "0%03o on new file '%s' (mode: '%s')", | |
389 | (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); | |
390 | goto end; | |
391 | } | |
392 | ||
393 | f = fdopen(fd, mode); | |
394 | if (f == NULL) { | |
395 | error_setg_errno(errp, errno, "failed to associate stdio stream with " | |
396 | "file descriptor %d, file '%s' (mode: '%s')", | |
397 | fd, path, mode); | |
398 | } | |
399 | ||
400 | end: | |
401 | if (f == NULL && fd != -1) { | |
402 | close(fd); | |
403 | if (oflag & O_CREAT) { | |
404 | unlink(path); | |
405 | } | |
406 | } | |
407 | return f; | |
c689b4f1 LE |
408 | } |
409 | ||
77dbc81b MA |
410 | int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, |
411 | Error **errp) | |
e3d4d252 MR |
412 | { |
413 | FILE *fh; | |
c689b4f1 | 414 | Error *local_err = NULL; |
85b6f6f5 | 415 | int64_t handle; |
e3d4d252 MR |
416 | |
417 | if (!has_mode) { | |
418 | mode = "r"; | |
419 | } | |
420 | slog("guest-file-open called, filepath: %s, mode: %s", path, mode); | |
c689b4f1 LE |
421 | fh = safe_open_or_create(path, mode, &local_err); |
422 | if (local_err != NULL) { | |
77dbc81b | 423 | error_propagate(errp, local_err); |
e3d4d252 MR |
424 | return -1; |
425 | } | |
426 | ||
427 | /* set fd non-blocking to avoid common use cases (like reading from a | |
428 | * named pipe) from hanging the agent | |
429 | */ | |
b0a8f9ad MAL |
430 | if (!g_unix_set_fd_nonblocking(fileno(fh), true, NULL)) { |
431 | fclose(fh); | |
432 | error_setg_errno(errp, errno, "Failed to set FD nonblocking"); | |
433 | return -1; | |
434 | } | |
e3d4d252 | 435 | |
77dbc81b | 436 | handle = guest_file_handle_add(fh, errp); |
a903f40c | 437 | if (handle < 0) { |
39097daf MR |
438 | fclose(fh); |
439 | return -1; | |
440 | } | |
441 | ||
d607a523 | 442 | slog("guest-file-open, handle: %" PRId64, handle); |
39097daf | 443 | return handle; |
e3d4d252 MR |
444 | } |
445 | ||
77dbc81b | 446 | void qmp_guest_file_close(int64_t handle, Error **errp) |
e3d4d252 | 447 | { |
77dbc81b | 448 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
449 | int ret; |
450 | ||
d607a523 | 451 | slog("guest-file-close called, handle: %" PRId64, handle); |
e3d4d252 | 452 | if (!gfh) { |
e3d4d252 MR |
453 | return; |
454 | } | |
455 | ||
456 | ret = fclose(gfh->fh); | |
3ac4b7c5 | 457 | if (ret == EOF) { |
77dbc81b | 458 | error_setg_errno(errp, errno, "failed to close handle"); |
e3d4d252 MR |
459 | return; |
460 | } | |
461 | ||
462 | QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); | |
7267c094 | 463 | g_free(gfh); |
e3d4d252 MR |
464 | } |
465 | ||
ead83a13 PMD |
466 | GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh, |
467 | int64_t count, Error **errp) | |
e3d4d252 | 468 | { |
e3d4d252 MR |
469 | GuestFileRead *read_data = NULL; |
470 | guchar *buf; | |
ead83a13 | 471 | FILE *fh = gfh->fh; |
e3d4d252 MR |
472 | size_t read_count; |
473 | ||
895b00f6 MAL |
474 | /* explicitly flush when switching from writing to reading */ |
475 | if (gfh->state == RW_STATE_WRITING) { | |
476 | int ret = fflush(fh); | |
477 | if (ret == EOF) { | |
478 | error_setg_errno(errp, errno, "failed to flush file"); | |
479 | return NULL; | |
480 | } | |
481 | gfh->state = RW_STATE_NEW; | |
482 | } | |
483 | ||
0697e9ed | 484 | buf = g_malloc0(count + 1); |
e3d4d252 MR |
485 | read_count = fread(buf, 1, count, fh); |
486 | if (ferror(fh)) { | |
77dbc81b | 487 | error_setg_errno(errp, errno, "failed to read file"); |
e3d4d252 MR |
488 | } else { |
489 | buf[read_count] = 0; | |
f3a06403 | 490 | read_data = g_new0(GuestFileRead, 1); |
e3d4d252 MR |
491 | read_data->count = read_count; |
492 | read_data->eof = feof(fh); | |
493 | if (read_count) { | |
494 | read_data->buf_b64 = g_base64_encode(buf, read_count); | |
495 | } | |
895b00f6 | 496 | gfh->state = RW_STATE_READING; |
e3d4d252 | 497 | } |
7267c094 | 498 | g_free(buf); |
e3d4d252 MR |
499 | clearerr(fh); |
500 | ||
501 | return read_data; | |
502 | } | |
503 | ||
504 | GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, | |
77dbc81b MA |
505 | bool has_count, int64_t count, |
506 | Error **errp) | |
e3d4d252 MR |
507 | { |
508 | GuestFileWrite *write_data = NULL; | |
509 | guchar *buf; | |
510 | gsize buf_len; | |
511 | int write_count; | |
77dbc81b | 512 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
513 | FILE *fh; |
514 | ||
515 | if (!gfh) { | |
e3d4d252 MR |
516 | return NULL; |
517 | } | |
518 | ||
519 | fh = gfh->fh; | |
895b00f6 MAL |
520 | |
521 | if (gfh->state == RW_STATE_READING) { | |
522 | int ret = fseek(fh, 0, SEEK_CUR); | |
523 | if (ret == -1) { | |
524 | error_setg_errno(errp, errno, "failed to seek file"); | |
525 | return NULL; | |
526 | } | |
527 | gfh->state = RW_STATE_NEW; | |
528 | } | |
529 | ||
920639ca DB |
530 | buf = qbase64_decode(buf_b64, -1, &buf_len, errp); |
531 | if (!buf) { | |
532 | return NULL; | |
533 | } | |
e3d4d252 MR |
534 | |
535 | if (!has_count) { | |
536 | count = buf_len; | |
537 | } else if (count < 0 || count > buf_len) { | |
77dbc81b | 538 | error_setg(errp, "value '%" PRId64 "' is invalid for argument count", |
db3edb66 | 539 | count); |
7267c094 | 540 | g_free(buf); |
e3d4d252 MR |
541 | return NULL; |
542 | } | |
543 | ||
544 | write_count = fwrite(buf, 1, count, fh); | |
545 | if (ferror(fh)) { | |
77dbc81b | 546 | error_setg_errno(errp, errno, "failed to write to file"); |
d607a523 | 547 | slog("guest-file-write failed, handle: %" PRId64, handle); |
e3d4d252 | 548 | } else { |
f3a06403 | 549 | write_data = g_new0(GuestFileWrite, 1); |
e3d4d252 MR |
550 | write_data->count = write_count; |
551 | write_data->eof = feof(fh); | |
895b00f6 | 552 | gfh->state = RW_STATE_WRITING; |
e3d4d252 | 553 | } |
7267c094 | 554 | g_free(buf); |
e3d4d252 MR |
555 | clearerr(fh); |
556 | ||
557 | return write_data; | |
558 | } | |
559 | ||
560 | struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, | |
0b4b4938 EB |
561 | GuestFileWhence *whence_code, |
562 | Error **errp) | |
e3d4d252 | 563 | { |
77dbc81b | 564 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
565 | GuestFileSeek *seek_data = NULL; |
566 | FILE *fh; | |
567 | int ret; | |
0a982b1b | 568 | int whence; |
0b4b4938 | 569 | Error *err = NULL; |
e3d4d252 MR |
570 | |
571 | if (!gfh) { | |
e3d4d252 MR |
572 | return NULL; |
573 | } | |
574 | ||
0a982b1b | 575 | /* We stupidly exposed 'whence':'int' in our qapi */ |
0b4b4938 EB |
576 | whence = ga_parse_whence(whence_code, &err); |
577 | if (err) { | |
578 | error_propagate(errp, err); | |
0a982b1b EB |
579 | return NULL; |
580 | } | |
581 | ||
e3d4d252 MR |
582 | fh = gfh->fh; |
583 | ret = fseek(fh, offset, whence); | |
584 | if (ret == -1) { | |
77dbc81b | 585 | error_setg_errno(errp, errno, "failed to seek file"); |
895b00f6 MAL |
586 | if (errno == ESPIPE) { |
587 | /* file is non-seekable, stdio shouldn't be buffering anyways */ | |
588 | gfh->state = RW_STATE_NEW; | |
589 | } | |
e3d4d252 | 590 | } else { |
10b7c5dd | 591 | seek_data = g_new0(GuestFileSeek, 1); |
e3d4d252 MR |
592 | seek_data->position = ftell(fh); |
593 | seek_data->eof = feof(fh); | |
895b00f6 | 594 | gfh->state = RW_STATE_NEW; |
e3d4d252 MR |
595 | } |
596 | clearerr(fh); | |
597 | ||
598 | return seek_data; | |
599 | } | |
600 | ||
77dbc81b | 601 | void qmp_guest_file_flush(int64_t handle, Error **errp) |
e3d4d252 | 602 | { |
77dbc81b | 603 | GuestFileHandle *gfh = guest_file_handle_find(handle, errp); |
e3d4d252 MR |
604 | FILE *fh; |
605 | int ret; | |
606 | ||
607 | if (!gfh) { | |
e3d4d252 MR |
608 | return; |
609 | } | |
610 | ||
611 | fh = gfh->fh; | |
612 | ret = fflush(fh); | |
613 | if (ret == EOF) { | |
77dbc81b | 614 | error_setg_errno(errp, errno, "failed to flush file"); |
895b00f6 MAL |
615 | } else { |
616 | gfh->state = RW_STATE_NEW; | |
e3d4d252 MR |
617 | } |
618 | } | |
619 | ||
e72c3f2e MR |
620 | /* linux-specific implementations. avoid this if at all possible. */ |
621 | #if defined(__linux__) | |
622 | ||
eab5fd59 | 623 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
af02203f | 624 | typedef struct FsMount { |
e3d4d252 MR |
625 | char *dirname; |
626 | char *devtype; | |
46d4c572 | 627 | unsigned int devmajor, devminor; |
af02203f PB |
628 | QTAILQ_ENTRY(FsMount) next; |
629 | } FsMount; | |
e3d4d252 | 630 | |
e5d9adbd | 631 | typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList; |
9e8aded4 | 632 | |
af02203f | 633 | static void free_fs_mount_list(FsMountList *mounts) |
9e8aded4 | 634 | { |
af02203f | 635 | FsMount *mount, *temp; |
9e8aded4 MR |
636 | |
637 | if (!mounts) { | |
638 | return; | |
639 | } | |
640 | ||
641 | QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { | |
642 | QTAILQ_REMOVE(mounts, mount, next); | |
643 | g_free(mount->dirname); | |
644 | g_free(mount->devtype); | |
645 | g_free(mount); | |
646 | } | |
647 | } | |
648 | ||
46d4c572 TS |
649 | static int dev_major_minor(const char *devpath, |
650 | unsigned int *devmajor, unsigned int *devminor) | |
651 | { | |
652 | struct stat st; | |
653 | ||
654 | *devmajor = 0; | |
655 | *devminor = 0; | |
656 | ||
657 | if (stat(devpath, &st) < 0) { | |
658 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); | |
659 | return -1; | |
660 | } | |
661 | if (S_ISDIR(st.st_mode)) { | |
662 | /* It is bind mount */ | |
663 | return -2; | |
664 | } | |
665 | if (S_ISBLK(st.st_mode)) { | |
666 | *devmajor = major(st.st_rdev); | |
667 | *devminor = minor(st.st_rdev); | |
668 | return 0; | |
669 | } | |
670 | return -1; | |
671 | } | |
672 | ||
e3d4d252 MR |
673 | /* |
674 | * Walk the mount table and build a list of local file systems | |
675 | */ | |
561bfcb6 | 676 | static bool build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) |
e3d4d252 MR |
677 | { |
678 | struct mntent *ment; | |
af02203f | 679 | FsMount *mount; |
9e2fa418 | 680 | char const *mtab = "/proc/self/mounts"; |
e3d4d252 | 681 | FILE *fp; |
46d4c572 | 682 | unsigned int devmajor, devminor; |
e3d4d252 | 683 | |
e3d4d252 MR |
684 | fp = setmntent(mtab, "r"); |
685 | if (!fp) { | |
77dbc81b | 686 | error_setg(errp, "failed to open mtab file: '%s'", mtab); |
561bfcb6 | 687 | return false; |
e3d4d252 MR |
688 | } |
689 | ||
690 | while ((ment = getmntent(fp))) { | |
691 | /* | |
692 | * An entry which device name doesn't start with a '/' is | |
693 | * either a dummy file system or a network file system. | |
694 | * Add special handling for smbfs and cifs as is done by | |
695 | * coreutils as well. | |
696 | */ | |
697 | if ((ment->mnt_fsname[0] != '/') || | |
698 | (strcmp(ment->mnt_type, "smbfs") == 0) || | |
699 | (strcmp(ment->mnt_type, "cifs") == 0)) { | |
700 | continue; | |
701 | } | |
46d4c572 TS |
702 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { |
703 | /* Skip bind mounts */ | |
704 | continue; | |
705 | } | |
e3d4d252 | 706 | |
f3a06403 | 707 | mount = g_new0(FsMount, 1); |
7267c094 AL |
708 | mount->dirname = g_strdup(ment->mnt_dir); |
709 | mount->devtype = g_strdup(ment->mnt_type); | |
46d4c572 TS |
710 | mount->devmajor = devmajor; |
711 | mount->devminor = devminor; | |
e3d4d252 | 712 | |
9e8aded4 | 713 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
e3d4d252 MR |
714 | } |
715 | ||
716 | endmntent(fp); | |
561bfcb6 | 717 | return true; |
e3d4d252 | 718 | } |
46d4c572 TS |
719 | |
720 | static void decode_mntname(char *name, int len) | |
721 | { | |
722 | int i, j = 0; | |
723 | for (i = 0; i <= len; i++) { | |
724 | if (name[i] != '\\') { | |
725 | name[j++] = name[i]; | |
726 | } else if (name[i + 1] == '\\') { | |
727 | name[j++] = '\\'; | |
728 | i++; | |
729 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && | |
730 | name[i + 2] >= '0' && name[i + 2] <= '7' && | |
731 | name[i + 3] >= '0' && name[i + 3] <= '7') { | |
732 | name[j++] = (name[i + 1] - '0') * 64 + | |
733 | (name[i + 2] - '0') * 8 + | |
734 | (name[i + 3] - '0'); | |
735 | i += 3; | |
736 | } else { | |
737 | name[j++] = name[i]; | |
738 | } | |
739 | } | |
740 | } | |
741 | ||
561bfcb6 | 742 | static bool build_fs_mount_list(FsMountList *mounts, Error **errp) |
46d4c572 TS |
743 | { |
744 | FsMount *mount; | |
745 | char const *mountinfo = "/proc/self/mountinfo"; | |
746 | FILE *fp; | |
747 | char *line = NULL, *dash; | |
748 | size_t n; | |
749 | char check; | |
750 | unsigned int devmajor, devminor; | |
751 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; | |
752 | ||
753 | fp = fopen(mountinfo, "r"); | |
754 | if (!fp) { | |
561bfcb6 | 755 | return build_fs_mount_list_from_mtab(mounts, errp); |
46d4c572 TS |
756 | } |
757 | ||
758 | while (getline(&line, &n, fp) != -1) { | |
759 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", | |
760 | &devmajor, &devminor, &dir_s, &dir_e, &check); | |
761 | if (ret < 3) { | |
762 | continue; | |
763 | } | |
764 | dash = strstr(line + dir_e, " - "); | |
765 | if (!dash) { | |
766 | continue; | |
767 | } | |
768 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", | |
769 | &type_s, &type_e, &dev_s, &dev_e, &check); | |
770 | if (ret < 1) { | |
771 | continue; | |
772 | } | |
773 | line[dir_e] = 0; | |
774 | dash[type_e] = 0; | |
775 | dash[dev_e] = 0; | |
776 | decode_mntname(line + dir_s, dir_e - dir_s); | |
777 | decode_mntname(dash + dev_s, dev_e - dev_s); | |
778 | if (devmajor == 0) { | |
779 | /* btrfs reports major number = 0 */ | |
780 | if (strcmp("btrfs", dash + type_s) != 0 || | |
781 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { | |
782 | continue; | |
783 | } | |
784 | } | |
785 | ||
f3a06403 | 786 | mount = g_new0(FsMount, 1); |
46d4c572 TS |
787 | mount->dirname = g_strdup(line + dir_s); |
788 | mount->devtype = g_strdup(dash + type_s); | |
789 | mount->devmajor = devmajor; | |
790 | mount->devminor = devminor; | |
791 | ||
792 | QTAILQ_INSERT_TAIL(mounts, mount, next); | |
793 | } | |
794 | free(line); | |
795 | ||
796 | fclose(fp); | |
561bfcb6 | 797 | return true; |
46d4c572 | 798 | } |
eab5fd59 PB |
799 | #endif |
800 | ||
801 | #if defined(CONFIG_FSFREEZE) | |
e3d4d252 | 802 | |
46d4c572 TS |
803 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) |
804 | { | |
805 | char *path; | |
806 | char *dpath; | |
807 | char *driver = NULL; | |
808 | char buf[PATH_MAX]; | |
809 | ssize_t len; | |
810 | ||
811 | path = g_strndup(syspath, pathlen); | |
812 | dpath = g_strdup_printf("%s/driver", path); | |
813 | len = readlink(dpath, buf, sizeof(buf) - 1); | |
814 | if (len != -1) { | |
815 | buf[len] = 0; | |
3e015d81 | 816 | driver = g_path_get_basename(buf); |
46d4c572 TS |
817 | } |
818 | g_free(dpath); | |
819 | g_free(path); | |
820 | return driver; | |
821 | } | |
822 | ||
823 | static int compare_uint(const void *_a, const void *_b) | |
824 | { | |
825 | unsigned int a = *(unsigned int *)_a; | |
826 | unsigned int b = *(unsigned int *)_b; | |
827 | ||
828 | return a < b ? -1 : a > b ? 1 : 0; | |
829 | } | |
830 | ||
831 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ | |
832 | static int build_hosts(char const *syspath, char const *host, bool ata, | |
833 | unsigned int *hosts, int hosts_max, Error **errp) | |
834 | { | |
835 | char *path; | |
836 | DIR *dir; | |
837 | struct dirent *entry; | |
838 | int i = 0; | |
839 | ||
840 | path = g_strndup(syspath, host - syspath); | |
841 | dir = opendir(path); | |
842 | if (!dir) { | |
843 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); | |
844 | g_free(path); | |
845 | return -1; | |
846 | } | |
847 | ||
848 | while (i < hosts_max) { | |
849 | entry = readdir(dir); | |
850 | if (!entry) { | |
851 | break; | |
852 | } | |
853 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { | |
854 | ++i; | |
855 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { | |
856 | ++i; | |
857 | } | |
858 | } | |
859 | ||
860 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); | |
861 | ||
862 | g_free(path); | |
863 | closedir(dir); | |
864 | return i; | |
865 | } | |
866 | ||
d9fe4f0f TH |
867 | /* |
868 | * Store disk device info for devices on the PCI bus. | |
869 | * Returns true if information has been stored, or false for failure. | |
870 | */ | |
871 | static bool build_guest_fsinfo_for_pci_dev(char const *syspath, | |
872 | GuestDiskAddress *disk, | |
873 | Error **errp) | |
46d4c572 TS |
874 | { |
875 | unsigned int pci[4], host, hosts[8], tgt[3]; | |
876 | int i, nhosts = 0, pcilen; | |
d9fe4f0f | 877 | GuestPCIAddress *pciaddr = disk->pci_controller; |
46d4c572 TS |
878 | bool has_ata = false, has_host = false, has_tgt = false; |
879 | char *p, *q, *driver = NULL; | |
d9fe4f0f | 880 | bool ret = false; |
46d4c572 TS |
881 | |
882 | p = strstr(syspath, "/devices/pci"); | |
883 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", | |
884 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { | |
743c71d0 | 885 | g_debug("only pci device is supported: sysfs path '%s'", syspath); |
d9fe4f0f | 886 | return false; |
46d4c572 TS |
887 | } |
888 | ||
743c71d0 MAL |
889 | p += 12 + pcilen; |
890 | while (true) { | |
891 | driver = get_pci_driver(syspath, p - syspath, errp); | |
892 | if (driver && (g_str_equal(driver, "ata_piix") || | |
893 | g_str_equal(driver, "sym53c8xx") || | |
894 | g_str_equal(driver, "virtio-pci") || | |
d48f61c8 ZP |
895 | g_str_equal(driver, "ahci") || |
896 | g_str_equal(driver, "nvme"))) { | |
743c71d0 MAL |
897 | break; |
898 | } | |
899 | ||
bb23a736 | 900 | g_free(driver); |
743c71d0 MAL |
901 | if (sscanf(p, "/%x:%x:%x.%x%n", |
902 | pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { | |
903 | p += pcilen; | |
904 | continue; | |
905 | } | |
906 | ||
907 | g_debug("unsupported driver or sysfs path '%s'", syspath); | |
d9fe4f0f | 908 | return false; |
46d4c572 TS |
909 | } |
910 | ||
911 | p = strstr(syspath, "/target"); | |
912 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
913 | tgt, tgt + 1, tgt + 2) == 3) { | |
914 | has_tgt = true; | |
915 | } | |
916 | ||
917 | p = strstr(syspath, "/ata"); | |
918 | if (p) { | |
919 | q = p + 4; | |
920 | has_ata = true; | |
921 | } else { | |
922 | p = strstr(syspath, "/host"); | |
923 | q = p + 5; | |
924 | } | |
925 | if (p && sscanf(q, "%u", &host) == 1) { | |
926 | has_host = true; | |
927 | nhosts = build_hosts(syspath, p, has_ata, hosts, | |
01a6df1b | 928 | ARRAY_SIZE(hosts), errp); |
46d4c572 TS |
929 | if (nhosts < 0) { |
930 | goto cleanup; | |
931 | } | |
932 | } | |
933 | ||
46d4c572 TS |
934 | pciaddr->domain = pci[0]; |
935 | pciaddr->bus = pci[1]; | |
936 | pciaddr->slot = pci[2]; | |
937 | pciaddr->function = pci[3]; | |
938 | ||
46d4c572 TS |
939 | if (strcmp(driver, "ata_piix") == 0) { |
940 | /* a host per ide bus, target*:0:<unit>:0 */ | |
941 | if (!has_host || !has_tgt) { | |
942 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
943 | goto cleanup; | |
944 | } | |
945 | for (i = 0; i < nhosts; i++) { | |
946 | if (host == hosts[i]) { | |
947 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; | |
948 | disk->bus = i; | |
949 | disk->unit = tgt[1]; | |
950 | break; | |
951 | } | |
952 | } | |
953 | if (i >= nhosts) { | |
954 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
955 | goto cleanup; | |
956 | } | |
957 | } else if (strcmp(driver, "sym53c8xx") == 0) { | |
958 | /* scsi(LSI Logic): target*:0:<unit>:0 */ | |
959 | if (!has_tgt) { | |
960 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
961 | goto cleanup; | |
962 | } | |
963 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
964 | disk->unit = tgt[1]; | |
965 | } else if (strcmp(driver, "virtio-pci") == 0) { | |
966 | if (has_tgt) { | |
967 | /* virtio-scsi: target*:0:0:<unit> */ | |
968 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
969 | disk->unit = tgt[2]; | |
970 | } else { | |
971 | /* virtio-blk: 1 disk per 1 device */ | |
972 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
973 | } | |
974 | } else if (strcmp(driver, "ahci") == 0) { | |
975 | /* ahci: 1 host per 1 unit */ | |
976 | if (!has_host || !has_tgt) { | |
977 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); | |
978 | goto cleanup; | |
979 | } | |
980 | for (i = 0; i < nhosts; i++) { | |
981 | if (host == hosts[i]) { | |
982 | disk->unit = i; | |
983 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; | |
984 | break; | |
985 | } | |
986 | } | |
987 | if (i >= nhosts) { | |
988 | g_debug("no host for '%s' (driver '%s')", syspath, driver); | |
989 | goto cleanup; | |
990 | } | |
d48f61c8 ZP |
991 | } else if (strcmp(driver, "nvme") == 0) { |
992 | disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; | |
46d4c572 TS |
993 | } else { |
994 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); | |
995 | goto cleanup; | |
996 | } | |
997 | ||
d9fe4f0f | 998 | ret = true; |
46d4c572 TS |
999 | |
1000 | cleanup: | |
46d4c572 | 1001 | g_free(driver); |
d9fe4f0f TH |
1002 | return ret; |
1003 | } | |
1004 | ||
23843c12 TH |
1005 | /* |
1006 | * Store disk device info for non-PCI virtio devices (for example s390x | |
1007 | * channel I/O devices). Returns true if information has been stored, or | |
1008 | * false for failure. | |
1009 | */ | |
1010 | static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, | |
1011 | GuestDiskAddress *disk, | |
1012 | Error **errp) | |
1013 | { | |
1014 | unsigned int tgt[3]; | |
1015 | char *p; | |
1016 | ||
1017 | if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { | |
1018 | g_debug("Unsupported virtio device '%s'", syspath); | |
1019 | return false; | |
1020 | } | |
1021 | ||
1022 | p = strstr(syspath, "/target"); | |
1023 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", | |
1024 | &tgt[0], &tgt[1], &tgt[2]) == 3) { | |
1025 | /* virtio-scsi: target*:0:<target>:<unit> */ | |
1026 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; | |
1027 | disk->bus = tgt[0]; | |
1028 | disk->target = tgt[1]; | |
1029 | disk->unit = tgt[2]; | |
1030 | } else { | |
1031 | /* virtio-blk: 1 disk per 1 device */ | |
1032 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; | |
1033 | } | |
1034 | ||
1035 | return true; | |
1036 | } | |
1037 | ||
5b723a5d TH |
1038 | /* |
1039 | * Store disk device info for CCW devices (s390x channel I/O devices). | |
1040 | * Returns true if information has been stored, or false for failure. | |
1041 | */ | |
1042 | static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, | |
1043 | GuestDiskAddress *disk, | |
1044 | Error **errp) | |
1045 | { | |
1046 | unsigned int cssid, ssid, subchno, devno; | |
1047 | char *p; | |
1048 | ||
1049 | p = strstr(syspath, "/devices/css"); | |
1050 | if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", | |
1051 | &cssid, &ssid, &subchno, &devno) < 4) { | |
1052 | g_debug("could not parse ccw device sysfs path: %s", syspath); | |
1053 | return false; | |
1054 | } | |
1055 | ||
1056 | disk->has_ccw_address = true; | |
1057 | disk->ccw_address = g_new0(GuestCCWAddress, 1); | |
1058 | disk->ccw_address->cssid = cssid; | |
1059 | disk->ccw_address->ssid = ssid; | |
1060 | disk->ccw_address->subchno = subchno; | |
1061 | disk->ccw_address->devno = devno; | |
1062 | ||
1063 | if (strstr(p, "/virtio")) { | |
1064 | build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1065 | } | |
1066 | ||
1067 | return true; | |
1068 | } | |
1069 | ||
d9fe4f0f TH |
1070 | /* Store disk device info specified by @sysfs into @fs */ |
1071 | static void build_guest_fsinfo_for_real_device(char const *syspath, | |
1072 | GuestFilesystemInfo *fs, | |
1073 | Error **errp) | |
1074 | { | |
1075 | GuestDiskAddress *disk; | |
1076 | GuestPCIAddress *pciaddr; | |
d9fe4f0f | 1077 | bool has_hwinf; |
43dadc43 TH |
1078 | #ifdef CONFIG_LIBUDEV |
1079 | struct udev *udev = NULL; | |
1080 | struct udev_device *udevice = NULL; | |
1081 | #endif | |
d9fe4f0f TH |
1082 | |
1083 | pciaddr = g_new0(GuestPCIAddress, 1); | |
43dadc43 TH |
1084 | pciaddr->domain = -1; /* -1 means field is invalid */ |
1085 | pciaddr->bus = -1; | |
1086 | pciaddr->slot = -1; | |
1087 | pciaddr->function = -1; | |
d9fe4f0f TH |
1088 | |
1089 | disk = g_new0(GuestDiskAddress, 1); | |
1090 | disk->pci_controller = pciaddr; | |
43dadc43 | 1091 | disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; |
d9fe4f0f | 1092 | |
43dadc43 TH |
1093 | #ifdef CONFIG_LIBUDEV |
1094 | udev = udev_new(); | |
1095 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1096 | if (udev == NULL || udevice == NULL) { | |
1097 | g_debug("failed to query udev"); | |
1098 | } else { | |
1099 | const char *devnode, *serial; | |
1100 | devnode = udev_device_get_devnode(udevice); | |
1101 | if (devnode != NULL) { | |
1102 | disk->dev = g_strdup(devnode); | |
1103 | disk->has_dev = true; | |
1104 | } | |
1105 | serial = udev_device_get_property_value(udevice, "ID_SERIAL"); | |
1106 | if (serial != NULL && *serial != 0) { | |
1107 | disk->serial = g_strdup(serial); | |
1108 | disk->has_serial = true; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | udev_unref(udev); | |
1113 | udev_device_unref(udevice); | |
1114 | #endif | |
1115 | ||
23843c12 TH |
1116 | if (strstr(syspath, "/devices/pci")) { |
1117 | has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); | |
5b723a5d TH |
1118 | } else if (strstr(syspath, "/devices/css")) { |
1119 | has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); | |
23843c12 TH |
1120 | } else if (strstr(syspath, "/virtio")) { |
1121 | has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); | |
1122 | } else { | |
1123 | g_debug("Unsupported device type for '%s'", syspath); | |
1124 | has_hwinf = false; | |
1125 | } | |
d9fe4f0f | 1126 | |
43dadc43 | 1127 | if (has_hwinf || disk->has_dev || disk->has_serial) { |
54aa3de7 | 1128 | QAPI_LIST_PREPEND(fs->disk, disk); |
d9fe4f0f | 1129 | } else { |
54aa3de7 | 1130 | qapi_free_GuestDiskAddress(disk); |
d9fe4f0f | 1131 | } |
46d4c572 TS |
1132 | } |
1133 | ||
1134 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1135 | GuestFilesystemInfo *fs, | |
1136 | Error **errp); | |
1137 | ||
1138 | /* Store a list of slave devices of virtual volume specified by @syspath into | |
1139 | * @fs */ | |
1140 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, | |
1141 | GuestFilesystemInfo *fs, | |
1142 | Error **errp) | |
1143 | { | |
292743d9 | 1144 | Error *err = NULL; |
46d4c572 TS |
1145 | DIR *dir; |
1146 | char *dirpath; | |
e668d1b8 | 1147 | struct dirent *entry; |
46d4c572 TS |
1148 | |
1149 | dirpath = g_strdup_printf("%s/slaves", syspath); | |
1150 | dir = opendir(dirpath); | |
1151 | if (!dir) { | |
8251a72f MR |
1152 | if (errno != ENOENT) { |
1153 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); | |
1154 | } | |
46d4c572 TS |
1155 | g_free(dirpath); |
1156 | return; | |
1157 | } | |
46d4c572 TS |
1158 | |
1159 | for (;;) { | |
e668d1b8 HZ |
1160 | errno = 0; |
1161 | entry = readdir(dir); | |
1162 | if (entry == NULL) { | |
1163 | if (errno) { | |
1164 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); | |
1165 | } | |
46d4c572 TS |
1166 | break; |
1167 | } | |
1168 | ||
e668d1b8 HZ |
1169 | if (entry->d_type == DT_LNK) { |
1170 | char *path; | |
1171 | ||
1172 | g_debug(" slave device '%s'", entry->d_name); | |
1173 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); | |
292743d9 | 1174 | build_guest_fsinfo_for_device(path, fs, &err); |
e668d1b8 | 1175 | g_free(path); |
46d4c572 | 1176 | |
292743d9 MA |
1177 | if (err) { |
1178 | error_propagate(errp, err); | |
46d4c572 TS |
1179 | break; |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
e668d1b8 | 1184 | g_free(dirpath); |
46d4c572 TS |
1185 | closedir(dir); |
1186 | } | |
1187 | ||
fed39564 TG |
1188 | static bool is_disk_virtual(const char *devpath, Error **errp) |
1189 | { | |
1190 | g_autofree char *syspath = realpath(devpath, NULL); | |
1191 | ||
1192 | if (!syspath) { | |
1193 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1194 | return false; | |
1195 | } | |
1196 | return strstr(syspath, "/devices/virtual/block/") != NULL; | |
1197 | } | |
1198 | ||
46d4c572 TS |
1199 | /* Dispatch to functions for virtual/real device */ |
1200 | static void build_guest_fsinfo_for_device(char const *devpath, | |
1201 | GuestFilesystemInfo *fs, | |
1202 | Error **errp) | |
1203 | { | |
fed39564 TG |
1204 | ERRP_GUARD(); |
1205 | g_autofree char *syspath = NULL; | |
1206 | bool is_virtual = false; | |
46d4c572 | 1207 | |
fed39564 | 1208 | syspath = realpath(devpath, NULL); |
46d4c572 | 1209 | if (!syspath) { |
bbb0151c JS |
1210 | if (errno != ENOENT) { |
1211 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); | |
1212 | return; | |
1213 | } | |
1214 | ||
1215 | /* ENOENT: This devpath may not exist because of container config */ | |
1216 | if (!fs->name) { | |
1217 | fs->name = g_path_get_basename(devpath); | |
1218 | } | |
46d4c572 TS |
1219 | return; |
1220 | } | |
1221 | ||
1222 | if (!fs->name) { | |
3e015d81 | 1223 | fs->name = g_path_get_basename(syspath); |
46d4c572 TS |
1224 | } |
1225 | ||
1226 | g_debug(" parse sysfs path '%s'", syspath); | |
fed39564 TG |
1227 | is_virtual = is_disk_virtual(syspath, errp); |
1228 | if (*errp != NULL) { | |
1229 | return; | |
1230 | } | |
1231 | if (is_virtual) { | |
46d4c572 TS |
1232 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); |
1233 | } else { | |
1234 | build_guest_fsinfo_for_real_device(syspath, fs, errp); | |
1235 | } | |
fed39564 TG |
1236 | } |
1237 | ||
1238 | #ifdef CONFIG_LIBUDEV | |
1239 | ||
1240 | /* | |
1241 | * Wrapper around build_guest_fsinfo_for_device() for getting just | |
1242 | * the disk address. | |
1243 | */ | |
1244 | static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) | |
1245 | { | |
1246 | g_autoptr(GuestFilesystemInfo) fs = NULL; | |
46d4c572 | 1247 | |
fed39564 TG |
1248 | fs = g_new0(GuestFilesystemInfo, 1); |
1249 | build_guest_fsinfo_for_device(syspath, fs, errp); | |
1250 | if (fs->disk != NULL) { | |
1251 | return g_steal_pointer(&fs->disk->value); | |
1252 | } | |
1253 | return NULL; | |
46d4c572 TS |
1254 | } |
1255 | ||
fed39564 TG |
1256 | static char *get_alias_for_syspath(const char *syspath) |
1257 | { | |
1258 | struct udev *udev = NULL; | |
1259 | struct udev_device *udevice = NULL; | |
1260 | char *ret = NULL; | |
1261 | ||
1262 | udev = udev_new(); | |
1263 | if (udev == NULL) { | |
1264 | g_debug("failed to query udev"); | |
1265 | goto out; | |
1266 | } | |
1267 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1268 | if (udevice == NULL) { | |
1269 | g_debug("failed to query udev for path: %s", syspath); | |
1270 | goto out; | |
1271 | } else { | |
1272 | const char *alias = udev_device_get_property_value( | |
1273 | udevice, "DM_NAME"); | |
1274 | /* | |
1275 | * NULL means there was an error and empty string means there is no | |
1276 | * alias. In case of no alias we return NULL instead of empty string. | |
1277 | */ | |
1278 | if (alias == NULL) { | |
1279 | g_debug("failed to query udev for device alias for: %s", | |
1280 | syspath); | |
1281 | } else if (*alias != 0) { | |
1282 | ret = g_strdup(alias); | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | out: | |
1287 | udev_unref(udev); | |
1288 | udev_device_unref(udevice); | |
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | static char *get_device_for_syspath(const char *syspath) | |
1293 | { | |
1294 | struct udev *udev = NULL; | |
1295 | struct udev_device *udevice = NULL; | |
1296 | char *ret = NULL; | |
1297 | ||
1298 | udev = udev_new(); | |
1299 | if (udev == NULL) { | |
1300 | g_debug("failed to query udev"); | |
1301 | goto out; | |
1302 | } | |
1303 | udevice = udev_device_new_from_syspath(udev, syspath); | |
1304 | if (udevice == NULL) { | |
1305 | g_debug("failed to query udev for path: %s", syspath); | |
1306 | goto out; | |
1307 | } else { | |
1308 | ret = g_strdup(udev_device_get_devnode(udevice)); | |
1309 | } | |
1310 | ||
1311 | out: | |
1312 | udev_unref(udev); | |
1313 | udev_device_unref(udevice); | |
1314 | return ret; | |
1315 | } | |
1316 | ||
1317 | static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) | |
1318 | { | |
1319 | g_autofree char *deps_dir = NULL; | |
1320 | const gchar *dep; | |
1321 | GDir *dp_deps = NULL; | |
1322 | ||
1323 | /* List dependent disks */ | |
1324 | deps_dir = g_strdup_printf("%s/slaves", disk_dir); | |
1325 | g_debug(" listing entries in: %s", deps_dir); | |
1326 | dp_deps = g_dir_open(deps_dir, 0, NULL); | |
1327 | if (dp_deps == NULL) { | |
1328 | g_debug("failed to list entries in %s", deps_dir); | |
1329 | return; | |
1330 | } | |
a8aa94b5 | 1331 | disk->has_dependencies = true; |
fed39564 TG |
1332 | while ((dep = g_dir_read_name(dp_deps)) != NULL) { |
1333 | g_autofree char *dep_dir = NULL; | |
fed39564 TG |
1334 | char *dev_name; |
1335 | ||
1336 | /* Add dependent disks */ | |
1337 | dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); | |
1338 | dev_name = get_device_for_syspath(dep_dir); | |
1339 | if (dev_name != NULL) { | |
1340 | g_debug(" adding dependent device: %s", dev_name); | |
54aa3de7 | 1341 | QAPI_LIST_PREPEND(disk->dependencies, dev_name); |
fed39564 TG |
1342 | } |
1343 | } | |
1344 | g_dir_close(dp_deps); | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * Detect partitions subdirectory, name is "<disk_name><number>" or | |
1349 | * "<disk_name>p<number>" | |
1350 | * | |
1351 | * @disk_name -- last component of /sys path (e.g. sda) | |
1352 | * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) | |
1353 | * @disk_dev -- device node of the disk (e.g. /dev/sda) | |
1354 | */ | |
1355 | static GuestDiskInfoList *get_disk_partitions( | |
1356 | GuestDiskInfoList *list, | |
1357 | const char *disk_name, const char *disk_dir, | |
1358 | const char *disk_dev) | |
1359 | { | |
54aa3de7 | 1360 | GuestDiskInfoList *ret = list; |
fed39564 TG |
1361 | struct dirent *de_disk; |
1362 | DIR *dp_disk = NULL; | |
1363 | size_t len = strlen(disk_name); | |
1364 | ||
1365 | dp_disk = opendir(disk_dir); | |
1366 | while ((de_disk = readdir(dp_disk)) != NULL) { | |
1367 | g_autofree char *partition_dir = NULL; | |
1368 | char *dev_name; | |
1369 | GuestDiskInfo *partition; | |
1370 | ||
1371 | if (!(de_disk->d_type & DT_DIR)) { | |
1372 | continue; | |
1373 | } | |
1374 | ||
1375 | if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && | |
1376 | ((*(de_disk->d_name + len) == 'p' && | |
1377 | isdigit(*(de_disk->d_name + len + 1))) || | |
1378 | isdigit(*(de_disk->d_name + len))))) { | |
1379 | continue; | |
1380 | } | |
1381 | ||
1382 | partition_dir = g_strdup_printf("%s/%s", | |
1383 | disk_dir, de_disk->d_name); | |
1384 | dev_name = get_device_for_syspath(partition_dir); | |
1385 | if (dev_name == NULL) { | |
1386 | g_debug("Failed to get device name for syspath: %s", | |
1387 | disk_dir); | |
1388 | continue; | |
1389 | } | |
1390 | partition = g_new0(GuestDiskInfo, 1); | |
1391 | partition->name = dev_name; | |
1392 | partition->partition = true; | |
bac9b87b | 1393 | partition->has_dependencies = true; |
fed39564 | 1394 | /* Add parent disk as dependent for easier tracking of hierarchy */ |
54aa3de7 | 1395 | QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); |
fed39564 | 1396 | |
54aa3de7 | 1397 | QAPI_LIST_PREPEND(ret, partition); |
fed39564 TG |
1398 | } |
1399 | closedir(dp_disk); | |
1400 | ||
1401 | return ret; | |
1402 | } | |
1403 | ||
22668881 ZP |
1404 | static void get_nvme_smart(GuestDiskInfo *disk) |
1405 | { | |
1406 | int fd; | |
1407 | GuestNVMeSmart *smart; | |
1408 | NvmeSmartLog log = {0}; | |
1409 | struct nvme_admin_cmd cmd = { | |
1410 | .opcode = NVME_ADM_CMD_GET_LOG_PAGE, | |
1411 | .nsid = NVME_NSID_BROADCAST, | |
1412 | .addr = (uintptr_t)&log, | |
1413 | .data_len = sizeof(log), | |
1414 | .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ | |
1415 | | (((sizeof(log) >> 2) - 1) << 16) | |
1416 | }; | |
1417 | ||
b9947c9c | 1418 | fd = qga_open_cloexec(disk->name, O_RDONLY, 0); |
22668881 ZP |
1419 | if (fd == -1) { |
1420 | g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); | |
1421 | return; | |
1422 | } | |
1423 | ||
1424 | if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { | |
1425 | g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); | |
1426 | close(fd); | |
1427 | return; | |
1428 | } | |
1429 | ||
1430 | disk->has_smart = true; | |
1431 | disk->smart = g_new0(GuestDiskSmart, 1); | |
1432 | disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; | |
1433 | ||
1434 | smart = &disk->smart->u.nvme; | |
1435 | smart->critical_warning = log.critical_warning; | |
1436 | smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ | |
1437 | smart->available_spare = log.available_spare; | |
1438 | smart->available_spare_threshold = log.available_spare_threshold; | |
1439 | smart->percentage_used = log.percentage_used; | |
1440 | smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); | |
1441 | smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); | |
1442 | smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); | |
1443 | smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); | |
1444 | smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); | |
1445 | smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); | |
1446 | smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); | |
1447 | smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); | |
1448 | smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); | |
1449 | smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); | |
1450 | smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); | |
1451 | smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); | |
1452 | smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); | |
1453 | smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); | |
1454 | smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); | |
1455 | smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); | |
1456 | smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); | |
1457 | smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); | |
1458 | smart->number_of_error_log_entries_lo = | |
1459 | le64_to_cpu(log.number_of_error_log_entries[0]); | |
1460 | smart->number_of_error_log_entries_hi = | |
1461 | le64_to_cpu(log.number_of_error_log_entries[1]); | |
1462 | ||
1463 | close(fd); | |
1464 | } | |
1465 | ||
1466 | static void get_disk_smart(GuestDiskInfo *disk) | |
1467 | { | |
1468 | if (disk->has_address | |
1469 | && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { | |
1470 | get_nvme_smart(disk); | |
1471 | } | |
1472 | } | |
1473 | ||
fed39564 TG |
1474 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) |
1475 | { | |
54aa3de7 | 1476 | GuestDiskInfoList *ret = NULL; |
fed39564 TG |
1477 | GuestDiskInfo *disk; |
1478 | DIR *dp = NULL; | |
1479 | struct dirent *de = NULL; | |
1480 | ||
1481 | g_debug("listing /sys/block directory"); | |
1482 | dp = opendir("/sys/block"); | |
1483 | if (dp == NULL) { | |
1484 | error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); | |
1485 | return NULL; | |
1486 | } | |
1487 | while ((de = readdir(dp)) != NULL) { | |
1488 | g_autofree char *disk_dir = NULL, *line = NULL, | |
1489 | *size_path = NULL; | |
1490 | char *dev_name; | |
1491 | Error *local_err = NULL; | |
1492 | if (de->d_type != DT_LNK) { | |
1493 | g_debug(" skipping entry: %s", de->d_name); | |
1494 | continue; | |
1495 | } | |
1496 | ||
1497 | /* Check size and skip zero-sized disks */ | |
1498 | g_debug(" checking disk size"); | |
1499 | size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); | |
1500 | if (!g_file_get_contents(size_path, &line, NULL, NULL)) { | |
1501 | g_debug(" failed to read disk size"); | |
1502 | continue; | |
1503 | } | |
1504 | if (g_strcmp0(line, "0\n") == 0) { | |
1505 | g_debug(" skipping zero-sized disk"); | |
1506 | continue; | |
1507 | } | |
1508 | ||
1509 | g_debug(" adding %s", de->d_name); | |
1510 | disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); | |
1511 | dev_name = get_device_for_syspath(disk_dir); | |
1512 | if (dev_name == NULL) { | |
1513 | g_debug("Failed to get device name for syspath: %s", | |
1514 | disk_dir); | |
1515 | continue; | |
1516 | } | |
1517 | disk = g_new0(GuestDiskInfo, 1); | |
1518 | disk->name = dev_name; | |
1519 | disk->partition = false; | |
1520 | disk->alias = get_alias_for_syspath(disk_dir); | |
1521 | disk->has_alias = (disk->alias != NULL); | |
54aa3de7 | 1522 | QAPI_LIST_PREPEND(ret, disk); |
fed39564 TG |
1523 | |
1524 | /* Get address for non-virtual devices */ | |
1525 | bool is_virtual = is_disk_virtual(disk_dir, &local_err); | |
1526 | if (local_err != NULL) { | |
1527 | g_debug(" failed to check disk path, ignoring error: %s", | |
1528 | error_get_pretty(local_err)); | |
1529 | error_free(local_err); | |
1530 | local_err = NULL; | |
1531 | /* Don't try to get the address */ | |
1532 | is_virtual = true; | |
1533 | } | |
1534 | if (!is_virtual) { | |
1535 | disk->address = get_disk_address(disk_dir, &local_err); | |
1536 | if (local_err != NULL) { | |
1537 | g_debug(" failed to get device info, ignoring error: %s", | |
1538 | error_get_pretty(local_err)); | |
1539 | error_free(local_err); | |
1540 | local_err = NULL; | |
1541 | } else if (disk->address != NULL) { | |
1542 | disk->has_address = true; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | get_disk_deps(disk_dir, disk); | |
22668881 | 1547 | get_disk_smart(disk); |
fed39564 TG |
1548 | ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); |
1549 | } | |
b1b9ab1c MR |
1550 | |
1551 | closedir(dp); | |
1552 | ||
fed39564 TG |
1553 | return ret; |
1554 | } | |
1555 | ||
1556 | #else | |
1557 | ||
1558 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
1559 | { | |
1560 | error_setg(errp, QERR_UNSUPPORTED); | |
1561 | return NULL; | |
1562 | } | |
1563 | ||
1564 | #endif | |
1565 | ||
46d4c572 TS |
1566 | /* Return a list of the disk device(s)' info which @mount lies on */ |
1567 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, | |
1568 | Error **errp) | |
1569 | { | |
1570 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); | |
25b5ff1a CH |
1571 | struct statvfs buf; |
1572 | unsigned long used, nonroot_total, fr_size; | |
46d4c572 TS |
1573 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", |
1574 | mount->devmajor, mount->devminor); | |
1575 | ||
1576 | fs->mountpoint = g_strdup(mount->dirname); | |
1577 | fs->type = g_strdup(mount->devtype); | |
1578 | build_guest_fsinfo_for_device(devpath, fs, errp); | |
1579 | ||
25b5ff1a CH |
1580 | if (statvfs(fs->mountpoint, &buf) == 0) { |
1581 | fr_size = buf.f_frsize; | |
1582 | used = buf.f_blocks - buf.f_bfree; | |
1583 | nonroot_total = used + buf.f_bavail; | |
1584 | fs->used_bytes = used * fr_size; | |
1585 | fs->total_bytes = nonroot_total * fr_size; | |
1586 | ||
1587 | fs->has_total_bytes = true; | |
1588 | fs->has_used_bytes = true; | |
1589 | } | |
1590 | ||
46d4c572 | 1591 | g_free(devpath); |
25b5ff1a | 1592 | |
46d4c572 TS |
1593 | return fs; |
1594 | } | |
1595 | ||
1596 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) | |
1597 | { | |
1598 | FsMountList mounts; | |
1599 | struct FsMount *mount; | |
54aa3de7 | 1600 | GuestFilesystemInfoList *ret = NULL; |
46d4c572 TS |
1601 | Error *local_err = NULL; |
1602 | ||
1603 | QTAILQ_INIT(&mounts); | |
561bfcb6 | 1604 | if (!build_fs_mount_list(&mounts, &local_err)) { |
46d4c572 TS |
1605 | error_propagate(errp, local_err); |
1606 | return NULL; | |
1607 | } | |
1608 | ||
1609 | QTAILQ_FOREACH(mount, &mounts, next) { | |
1610 | g_debug("Building guest fsinfo for '%s'", mount->dirname); | |
1611 | ||
54aa3de7 | 1612 | QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); |
46d4c572 TS |
1613 | if (local_err) { |
1614 | error_propagate(errp, local_err); | |
1615 | qapi_free_GuestFilesystemInfoList(ret); | |
1616 | ret = NULL; | |
1617 | break; | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | free_fs_mount_list(&mounts); | |
1622 | return ret; | |
1623 | } | |
1624 | ||
1625 | ||
ec0f694c TS |
1626 | typedef enum { |
1627 | FSFREEZE_HOOK_THAW = 0, | |
1628 | FSFREEZE_HOOK_FREEZE, | |
1629 | } FsfreezeHookArg; | |
1630 | ||
13a439ec | 1631 | static const char *fsfreeze_hook_arg_string[] = { |
ec0f694c TS |
1632 | "thaw", |
1633 | "freeze", | |
1634 | }; | |
1635 | ||
77dbc81b | 1636 | static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) |
ec0f694c TS |
1637 | { |
1638 | int status; | |
1639 | pid_t pid; | |
1640 | const char *hook; | |
1641 | const char *arg_str = fsfreeze_hook_arg_string[arg]; | |
1642 | Error *local_err = NULL; | |
1643 | ||
1644 | hook = ga_fsfreeze_hook(ga_state); | |
1645 | if (!hook) { | |
1646 | return; | |
1647 | } | |
1648 | if (access(hook, X_OK) != 0) { | |
77dbc81b | 1649 | error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); |
ec0f694c TS |
1650 | return; |
1651 | } | |
1652 | ||
1653 | slog("executing fsfreeze hook with arg '%s'", arg_str); | |
1654 | pid = fork(); | |
1655 | if (pid == 0) { | |
1656 | setsid(); | |
1657 | reopen_fd_to_null(0); | |
1658 | reopen_fd_to_null(1); | |
1659 | reopen_fd_to_null(2); | |
1660 | ||
fcc41961 | 1661 | execl(hook, hook, arg_str, NULL); |
ec0f694c TS |
1662 | _exit(EXIT_FAILURE); |
1663 | } else if (pid < 0) { | |
77dbc81b | 1664 | error_setg_errno(errp, errno, "failed to create child process"); |
ec0f694c TS |
1665 | return; |
1666 | } | |
1667 | ||
1668 | ga_wait_child(pid, &status, &local_err); | |
84d18f06 | 1669 | if (local_err) { |
77dbc81b | 1670 | error_propagate(errp, local_err); |
ec0f694c TS |
1671 | return; |
1672 | } | |
1673 | ||
1674 | if (!WIFEXITED(status)) { | |
77dbc81b | 1675 | error_setg(errp, "fsfreeze hook has terminated abnormally"); |
ec0f694c TS |
1676 | return; |
1677 | } | |
1678 | ||
1679 | status = WEXITSTATUS(status); | |
1680 | if (status) { | |
77dbc81b | 1681 | error_setg(errp, "fsfreeze hook has failed with status %d", status); |
ec0f694c TS |
1682 | return; |
1683 | } | |
1684 | } | |
1685 | ||
e3d4d252 MR |
1686 | /* |
1687 | * Return status of freeze/thaw | |
1688 | */ | |
77dbc81b | 1689 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e3d4d252 | 1690 | { |
f22d85e9 MR |
1691 | if (ga_is_frozen(ga_state)) { |
1692 | return GUEST_FSFREEZE_STATUS_FROZEN; | |
1693 | } | |
1694 | ||
1695 | return GUEST_FSFREEZE_STATUS_THAWED; | |
e3d4d252 MR |
1696 | } |
1697 | ||
e99bce20 TS |
1698 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
1699 | { | |
1700 | return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); | |
1701 | } | |
1702 | ||
e3d4d252 MR |
1703 | /* |
1704 | * Walk list of mounted file systems in the guest, and freeze the ones which | |
1705 | * are real local file systems. | |
1706 | */ | |
e99bce20 TS |
1707 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
1708 | strList *mountpoints, | |
1709 | Error **errp) | |
e3d4d252 MR |
1710 | { |
1711 | int ret = 0, i = 0; | |
e99bce20 | 1712 | strList *list; |
af02203f PB |
1713 | FsMountList mounts; |
1714 | struct FsMount *mount; | |
261551d1 | 1715 | Error *local_err = NULL; |
e3d4d252 | 1716 | int fd; |
e3d4d252 MR |
1717 | |
1718 | slog("guest-fsfreeze called"); | |
1719 | ||
ec0f694c | 1720 | execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); |
84d18f06 | 1721 | if (local_err) { |
77dbc81b | 1722 | error_propagate(errp, local_err); |
ec0f694c TS |
1723 | return -1; |
1724 | } | |
1725 | ||
9e8aded4 | 1726 | QTAILQ_INIT(&mounts); |
561bfcb6 | 1727 | if (!build_fs_mount_list(&mounts, &local_err)) { |
77dbc81b | 1728 | error_propagate(errp, local_err); |
261551d1 | 1729 | return -1; |
e3d4d252 MR |
1730 | } |
1731 | ||
1732 | /* cannot risk guest agent blocking itself on a write in this state */ | |
f22d85e9 | 1733 | ga_set_frozen(ga_state); |
e3d4d252 | 1734 | |
eae3eb3e | 1735 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { |
e99bce20 TS |
1736 | /* To issue fsfreeze in the reverse order of mounts, check if the |
1737 | * mount is listed in the list here */ | |
1738 | if (has_mountpoints) { | |
1739 | for (list = mountpoints; list; list = list->next) { | |
1740 | if (strcmp(list->value, mount->dirname) == 0) { | |
1741 | break; | |
1742 | } | |
1743 | } | |
1744 | if (!list) { | |
1745 | continue; | |
1746 | } | |
1747 | } | |
1748 | ||
b9947c9c | 1749 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
e3d4d252 | 1750 | if (fd == -1) { |
77dbc81b | 1751 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); |
e3d4d252 MR |
1752 | goto error; |
1753 | } | |
1754 | ||
e35916ac MT |
1755 | /* we try to cull filesystems we know won't work in advance, but other |
1756 | * filesystems may not implement fsfreeze for less obvious reasons. | |
9e8aded4 MR |
1757 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
1758 | * the number of frozen filesystems. | |
ce2eb6c4 PL |
1759 | * if a filesystem is mounted more than once (aka bind mount) a |
1760 | * consecutive attempt to freeze an already frozen filesystem will | |
1761 | * return EBUSY. | |
9e8aded4 MR |
1762 | * |
1763 | * any other error means a failure to freeze a filesystem we | |
1764 | * expect to be freezable, so return an error in those cases | |
1765 | * and return system to thawed state. | |
e3d4d252 MR |
1766 | */ |
1767 | ret = ioctl(fd, FIFREEZE); | |
9e8aded4 | 1768 | if (ret == -1) { |
ce2eb6c4 | 1769 | if (errno != EOPNOTSUPP && errno != EBUSY) { |
77dbc81b | 1770 | error_setg_errno(errp, errno, "failed to freeze %s", |
617fbbc1 | 1771 | mount->dirname); |
9e8aded4 MR |
1772 | close(fd); |
1773 | goto error; | |
1774 | } | |
1775 | } else { | |
1776 | i++; | |
e3d4d252 MR |
1777 | } |
1778 | close(fd); | |
e3d4d252 MR |
1779 | } |
1780 | ||
af02203f | 1781 | free_fs_mount_list(&mounts); |
65650f01 CH |
1782 | /* We may not issue any FIFREEZE here. |
1783 | * Just unset ga_state here and ready for the next call. | |
1784 | */ | |
1785 | if (i == 0) { | |
1786 | ga_unset_frozen(ga_state); | |
1787 | } | |
e3d4d252 MR |
1788 | return i; |
1789 | ||
1790 | error: | |
af02203f | 1791 | free_fs_mount_list(&mounts); |
9e8aded4 | 1792 | qmp_guest_fsfreeze_thaw(NULL); |
e3d4d252 MR |
1793 | return 0; |
1794 | } | |
1795 | ||
1796 | /* | |
1797 | * Walk list of frozen file systems in the guest, and thaw them. | |
1798 | */ | |
77dbc81b | 1799 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e3d4d252 MR |
1800 | { |
1801 | int ret; | |
af02203f PB |
1802 | FsMountList mounts; |
1803 | FsMount *mount; | |
9e8aded4 | 1804 | int fd, i = 0, logged; |
261551d1 | 1805 | Error *local_err = NULL; |
9e8aded4 MR |
1806 | |
1807 | QTAILQ_INIT(&mounts); | |
561bfcb6 | 1808 | if (!build_fs_mount_list(&mounts, &local_err)) { |
77dbc81b | 1809 | error_propagate(errp, local_err); |
9e8aded4 MR |
1810 | return 0; |
1811 | } | |
e3d4d252 | 1812 | |
9e8aded4 MR |
1813 | QTAILQ_FOREACH(mount, &mounts, next) { |
1814 | logged = false; | |
b9947c9c | 1815 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
e3d4d252 | 1816 | if (fd == -1) { |
e3d4d252 MR |
1817 | continue; |
1818 | } | |
9e8aded4 MR |
1819 | /* we have no way of knowing whether a filesystem was actually unfrozen |
1820 | * as a result of a successful call to FITHAW, only that if an error | |
1821 | * was returned the filesystem was *not* unfrozen by that particular | |
1822 | * call. | |
1823 | * | |
a31f0531 | 1824 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
9e8aded4 MR |
1825 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
1826 | * in which case either the filesystem is in an unfreezable state, or, | |
1827 | * more likely, it was thawed previously (and remains so afterward). | |
1828 | * | |
1829 | * also, since the most recent successful call is the one that did | |
1830 | * the actual unfreeze, we can use this to provide an accurate count | |
1831 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which | |
1832 | * may * be useful for determining whether a filesystem was unfrozen | |
1833 | * during the freeze/thaw phase by a process other than qemu-ga. | |
1834 | */ | |
1835 | do { | |
1836 | ret = ioctl(fd, FITHAW); | |
1837 | if (ret == 0 && !logged) { | |
1838 | i++; | |
1839 | logged = true; | |
1840 | } | |
1841 | } while (ret == 0); | |
e3d4d252 | 1842 | close(fd); |
e3d4d252 MR |
1843 | } |
1844 | ||
f22d85e9 | 1845 | ga_unset_frozen(ga_state); |
af02203f | 1846 | free_fs_mount_list(&mounts); |
ec0f694c | 1847 | |
77dbc81b | 1848 | execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); |
ec0f694c | 1849 | |
e3d4d252 MR |
1850 | return i; |
1851 | } | |
1852 | ||
e3d4d252 MR |
1853 | static void guest_fsfreeze_cleanup(void) |
1854 | { | |
e3d4d252 MR |
1855 | Error *err = NULL; |
1856 | ||
f22d85e9 | 1857 | if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { |
6f686749 MA |
1858 | qmp_guest_fsfreeze_thaw(&err); |
1859 | if (err) { | |
1860 | slog("failed to clean up frozen filesystems: %s", | |
1861 | error_get_pretty(err)); | |
1862 | error_free(err); | |
e3d4d252 MR |
1863 | } |
1864 | } | |
1865 | } | |
e72c3f2e | 1866 | #endif /* CONFIG_FSFREEZE */ |
e3d4d252 | 1867 | |
eab5fd59 PB |
1868 | #if defined(CONFIG_FSTRIM) |
1869 | /* | |
1870 | * Walk list of mounted file systems in the guest, and trim them. | |
1871 | */ | |
e82855d9 JO |
1872 | GuestFilesystemTrimResponse * |
1873 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 1874 | { |
e82855d9 | 1875 | GuestFilesystemTrimResponse *response; |
e82855d9 | 1876 | GuestFilesystemTrimResult *result; |
eab5fd59 PB |
1877 | int ret = 0; |
1878 | FsMountList mounts; | |
1879 | struct FsMount *mount; | |
1880 | int fd; | |
73a652a1 | 1881 | struct fstrim_range r; |
eab5fd59 PB |
1882 | |
1883 | slog("guest-fstrim called"); | |
1884 | ||
1885 | QTAILQ_INIT(&mounts); | |
561bfcb6 | 1886 | if (!build_fs_mount_list(&mounts, errp)) { |
e82855d9 | 1887 | return NULL; |
eab5fd59 PB |
1888 | } |
1889 | ||
e82855d9 JO |
1890 | response = g_malloc0(sizeof(*response)); |
1891 | ||
eab5fd59 | 1892 | QTAILQ_FOREACH(mount, &mounts, next) { |
e82855d9 JO |
1893 | result = g_malloc0(sizeof(*result)); |
1894 | result->path = g_strdup(mount->dirname); | |
1895 | ||
54aa3de7 | 1896 | QAPI_LIST_PREPEND(response->paths, result); |
e82855d9 | 1897 | |
b9947c9c | 1898 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
eab5fd59 | 1899 | if (fd == -1) { |
e82855d9 JO |
1900 | result->error = g_strdup_printf("failed to open: %s", |
1901 | strerror(errno)); | |
1902 | result->has_error = true; | |
1903 | continue; | |
eab5fd59 PB |
1904 | } |
1905 | ||
e35916ac MT |
1906 | /* We try to cull filesystems we know won't work in advance, but other |
1907 | * filesystems may not implement fstrim for less obvious reasons. | |
1908 | * These will report EOPNOTSUPP; while in some other cases ENOTTY | |
1909 | * will be reported (e.g. CD-ROMs). | |
e82855d9 | 1910 | * Any other error means an unexpected error. |
eab5fd59 | 1911 | */ |
73a652a1 JO |
1912 | r.start = 0; |
1913 | r.len = -1; | |
1914 | r.minlen = has_minimum ? minimum : 0; | |
eab5fd59 PB |
1915 | ret = ioctl(fd, FITRIM, &r); |
1916 | if (ret == -1) { | |
e82855d9 JO |
1917 | result->has_error = true; |
1918 | if (errno == ENOTTY || errno == EOPNOTSUPP) { | |
1919 | result->error = g_strdup("trim not supported"); | |
1920 | } else { | |
1921 | result->error = g_strdup_printf("failed to trim: %s", | |
1922 | strerror(errno)); | |
eab5fd59 | 1923 | } |
e82855d9 JO |
1924 | close(fd); |
1925 | continue; | |
eab5fd59 | 1926 | } |
e82855d9 JO |
1927 | |
1928 | result->has_minimum = true; | |
1929 | result->minimum = r.minlen; | |
1930 | result->has_trimmed = true; | |
1931 | result->trimmed = r.len; | |
eab5fd59 PB |
1932 | close(fd); |
1933 | } | |
1934 | ||
eab5fd59 | 1935 | free_fs_mount_list(&mounts); |
e82855d9 | 1936 | return response; |
eab5fd59 PB |
1937 | } |
1938 | #endif /* CONFIG_FSTRIM */ | |
1939 | ||
1940 | ||
11d0f125 LC |
1941 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
1942 | #define SUSPEND_SUPPORTED 0 | |
1943 | #define SUSPEND_NOT_SUPPORTED 1 | |
1944 | ||
8b020b5e DHB |
1945 | typedef enum { |
1946 | SUSPEND_MODE_DISK = 0, | |
1947 | SUSPEND_MODE_RAM = 1, | |
1948 | SUSPEND_MODE_HYBRID = 2, | |
1949 | } SuspendMode; | |
1950 | ||
1951 | /* | |
1952 | * Executes a command in a child process using g_spawn_sync, | |
1953 | * returning an int >= 0 representing the exit status of the | |
1954 | * process. | |
1955 | * | |
1956 | * If the program wasn't found in path, returns -1. | |
1957 | * | |
1958 | * If a problem happened when creating the child process, | |
1959 | * returns -1 and errp is set. | |
1960 | */ | |
1961 | static int run_process_child(const char *command[], Error **errp) | |
11d0f125 | 1962 | { |
8b020b5e DHB |
1963 | int exit_status, spawn_flag; |
1964 | GError *g_err = NULL; | |
1965 | bool success; | |
1966 | ||
1967 | spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | | |
1968 | G_SPAWN_STDERR_TO_DEV_NULL; | |
11d0f125 | 1969 | |
fcc41961 | 1970 | success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, |
8b020b5e DHB |
1971 | NULL, NULL, NULL, NULL, |
1972 | &exit_status, &g_err); | |
304a0fcb | 1973 | |
8b020b5e DHB |
1974 | if (success) { |
1975 | return WEXITSTATUS(exit_status); | |
304a0fcb DHB |
1976 | } |
1977 | ||
8b020b5e DHB |
1978 | if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { |
1979 | error_setg(errp, "failed to create child process, error '%s'", | |
1980 | g_err->message); | |
a5fcf0e3 | 1981 | } |
11d0f125 | 1982 | |
8b020b5e DHB |
1983 | g_error_free(g_err); |
1984 | return -1; | |
1985 | } | |
1986 | ||
067927d6 DHB |
1987 | static bool systemd_supports_mode(SuspendMode mode, Error **errp) |
1988 | { | |
067927d6 DHB |
1989 | const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", |
1990 | "systemd-hybrid-sleep"}; | |
1991 | const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; | |
1992 | int status; | |
1993 | ||
992861fb | 1994 | status = run_process_child(cmd, errp); |
067927d6 DHB |
1995 | |
1996 | /* | |
1997 | * systemctl status uses LSB return codes so we can expect | |
1998 | * status > 0 and be ok. To assert if the guest has support | |
1999 | * for the selected suspend mode, status should be < 4. 4 is | |
2000 | * the code for unknown service status, the return value when | |
2001 | * the service does not exist. A common value is status = 3 | |
2002 | * (program is not running). | |
2003 | */ | |
2004 | if (status > 0 && status < 4) { | |
2005 | return true; | |
2006 | } | |
2007 | ||
067927d6 DHB |
2008 | return false; |
2009 | } | |
2010 | ||
2011 | static void systemd_suspend(SuspendMode mode, Error **errp) | |
2012 | { | |
2013 | Error *local_err = NULL; | |
2014 | const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; | |
2015 | const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; | |
2016 | int status; | |
2017 | ||
2018 | status = run_process_child(cmd, &local_err); | |
2019 | ||
2020 | if (status == 0) { | |
2021 | return; | |
2022 | } | |
2023 | ||
2024 | if ((status == -1) && !local_err) { | |
2025 | error_setg(errp, "the helper program 'systemctl %s' was not found", | |
2026 | systemctl_args[mode]); | |
2027 | return; | |
2028 | } | |
2029 | ||
2030 | if (local_err) { | |
2031 | error_propagate(errp, local_err); | |
2032 | } else { | |
2033 | error_setg(errp, "the helper program 'systemctl %s' returned an " | |
2034 | "unexpected exit status code (%d)", | |
2035 | systemctl_args[mode], status); | |
2036 | } | |
2037 | } | |
2038 | ||
8b020b5e DHB |
2039 | static bool pmutils_supports_mode(SuspendMode mode, Error **errp) |
2040 | { | |
2041 | Error *local_err = NULL; | |
2042 | const char *pmutils_args[3] = {"--hibernate", "--suspend", | |
2043 | "--suspend-hybrid"}; | |
2044 | const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; | |
2045 | int status; | |
2046 | ||
2047 | status = run_process_child(cmd, &local_err); | |
2048 | ||
2049 | if (status == SUSPEND_SUPPORTED) { | |
2050 | return true; | |
11d0f125 LC |
2051 | } |
2052 | ||
8b020b5e DHB |
2053 | if ((status == -1) && !local_err) { |
2054 | return false; | |
6b26e837 | 2055 | } |
11d0f125 | 2056 | |
8b020b5e DHB |
2057 | if (local_err) { |
2058 | error_propagate(errp, local_err); | |
2059 | } else { | |
77dbc81b | 2060 | error_setg(errp, |
8b020b5e DHB |
2061 | "the helper program '%s' returned an unexpected exit" |
2062 | " status code (%d)", "pm-is-supported", status); | |
11d0f125 LC |
2063 | } |
2064 | ||
8b020b5e | 2065 | return false; |
a5fcf0e3 DHB |
2066 | } |
2067 | ||
8b020b5e | 2068 | static void pmutils_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
2069 | { |
2070 | Error *local_err = NULL; | |
8b020b5e DHB |
2071 | const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", |
2072 | "pm-suspend-hybrid"}; | |
2073 | const char *cmd[2] = {pmutils_binaries[mode], NULL}; | |
246d76eb DHB |
2074 | int status; |
2075 | ||
8b020b5e | 2076 | status = run_process_child(cmd, &local_err); |
246d76eb | 2077 | |
8b020b5e | 2078 | if (status == 0) { |
246d76eb DHB |
2079 | return; |
2080 | } | |
2081 | ||
8b020b5e DHB |
2082 | if ((status == -1) && !local_err) { |
2083 | error_setg(errp, "the helper program '%s' was not found", | |
2084 | pmutils_binaries[mode]); | |
2085 | return; | |
246d76eb DHB |
2086 | } |
2087 | ||
246d76eb DHB |
2088 | if (local_err) { |
2089 | error_propagate(errp, local_err); | |
8b020b5e | 2090 | } else { |
246d76eb | 2091 | error_setg(errp, |
8b020b5e DHB |
2092 | "the helper program '%s' returned an unexpected exit" |
2093 | " status code (%d)", pmutils_binaries[mode], status); | |
246d76eb | 2094 | } |
246d76eb DHB |
2095 | } |
2096 | ||
8b020b5e | 2097 | static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) |
a5fcf0e3 | 2098 | { |
8b020b5e DHB |
2099 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2100 | const char *sysfile_str = sysfile_strs[mode]; | |
a5fcf0e3 DHB |
2101 | char buf[32]; /* hopefully big enough */ |
2102 | int fd; | |
2103 | ssize_t ret; | |
2104 | ||
8b020b5e DHB |
2105 | if (!sysfile_str) { |
2106 | error_setg(errp, "unknown guest suspend mode"); | |
a5fcf0e3 DHB |
2107 | return false; |
2108 | } | |
2109 | ||
2110 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); | |
2111 | if (fd < 0) { | |
2112 | return false; | |
2113 | } | |
2114 | ||
2115 | ret = read(fd, buf, sizeof(buf) - 1); | |
d9c745c1 | 2116 | close(fd); |
a5fcf0e3 DHB |
2117 | if (ret <= 0) { |
2118 | return false; | |
2119 | } | |
2120 | buf[ret] = '\0'; | |
2121 | ||
2122 | if (strstr(buf, sysfile_str)) { | |
2123 | return true; | |
2124 | } | |
2125 | return false; | |
2126 | } | |
2127 | ||
8b020b5e | 2128 | static void linux_sys_state_suspend(SuspendMode mode, Error **errp) |
11d0f125 | 2129 | { |
7b376087 | 2130 | Error *local_err = NULL; |
8b020b5e DHB |
2131 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
2132 | const char *sysfile_str = sysfile_strs[mode]; | |
7b376087 | 2133 | pid_t pid; |
dc8764f0 | 2134 | int status; |
11d0f125 | 2135 | |
8b020b5e | 2136 | if (!sysfile_str) { |
304a0fcb DHB |
2137 | error_setg(errp, "unknown guest suspend mode"); |
2138 | return; | |
2139 | } | |
2140 | ||
11d0f125 | 2141 | pid = fork(); |
246d76eb | 2142 | if (!pid) { |
11d0f125 LC |
2143 | /* child */ |
2144 | int fd; | |
2145 | ||
2146 | setsid(); | |
2147 | reopen_fd_to_null(0); | |
2148 | reopen_fd_to_null(1); | |
2149 | reopen_fd_to_null(2); | |
2150 | ||
11d0f125 LC |
2151 | fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); |
2152 | if (fd < 0) { | |
2153 | _exit(EXIT_FAILURE); | |
2154 | } | |
2155 | ||
2156 | if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { | |
2157 | _exit(EXIT_FAILURE); | |
2158 | } | |
2159 | ||
2160 | _exit(EXIT_SUCCESS); | |
7b376087 | 2161 | } else if (pid < 0) { |
77dbc81b | 2162 | error_setg_errno(errp, errno, "failed to create child process"); |
246d76eb | 2163 | return; |
11d0f125 LC |
2164 | } |
2165 | ||
7b376087 | 2166 | ga_wait_child(pid, &status, &local_err); |
84d18f06 | 2167 | if (local_err) { |
77dbc81b | 2168 | error_propagate(errp, local_err); |
246d76eb | 2169 | return; |
dc8764f0 LC |
2170 | } |
2171 | ||
7b376087 | 2172 | if (WEXITSTATUS(status)) { |
77dbc81b | 2173 | error_setg(errp, "child process has failed to suspend"); |
11d0f125 | 2174 | } |
dc8764f0 | 2175 | |
246d76eb DHB |
2176 | } |
2177 | ||
8b020b5e | 2178 | static void guest_suspend(SuspendMode mode, Error **errp) |
246d76eb DHB |
2179 | { |
2180 | Error *local_err = NULL; | |
73e1d8eb | 2181 | bool mode_supported = false; |
246d76eb | 2182 | |
73e1d8eb DHB |
2183 | if (systemd_supports_mode(mode, &local_err)) { |
2184 | mode_supported = true; | |
2185 | systemd_suspend(mode, &local_err); | |
246d76eb DHB |
2186 | } |
2187 | ||
067927d6 DHB |
2188 | if (!local_err) { |
2189 | return; | |
2190 | } | |
2191 | ||
2192 | error_free(local_err); | |
6a4a3853 | 2193 | local_err = NULL; |
067927d6 | 2194 | |
73e1d8eb DHB |
2195 | if (pmutils_supports_mode(mode, &local_err)) { |
2196 | mode_supported = true; | |
2197 | pmutils_suspend(mode, &local_err); | |
2198 | } | |
2199 | ||
246d76eb DHB |
2200 | if (!local_err) { |
2201 | return; | |
2202 | } | |
2203 | ||
2204 | error_free(local_err); | |
6a4a3853 | 2205 | local_err = NULL; |
246d76eb | 2206 | |
73e1d8eb DHB |
2207 | if (linux_sys_state_supports_mode(mode, &local_err)) { |
2208 | mode_supported = true; | |
2209 | linux_sys_state_suspend(mode, &local_err); | |
2210 | } | |
2211 | ||
2212 | if (!mode_supported) { | |
6a4a3853 | 2213 | error_free(local_err); |
73e1d8eb DHB |
2214 | error_setg(errp, |
2215 | "the requested suspend mode is not supported by the guest"); | |
b2322003 | 2216 | } else { |
246d76eb DHB |
2217 | error_propagate(errp, local_err); |
2218 | } | |
11d0f125 LC |
2219 | } |
2220 | ||
77dbc81b | 2221 | void qmp_guest_suspend_disk(Error **errp) |
11d0f125 | 2222 | { |
304a0fcb | 2223 | guest_suspend(SUSPEND_MODE_DISK, errp); |
11d0f125 LC |
2224 | } |
2225 | ||
77dbc81b | 2226 | void qmp_guest_suspend_ram(Error **errp) |
fbf42210 | 2227 | { |
304a0fcb | 2228 | guest_suspend(SUSPEND_MODE_RAM, errp); |
fbf42210 LC |
2229 | } |
2230 | ||
77dbc81b | 2231 | void qmp_guest_suspend_hybrid(Error **errp) |
95f4f404 | 2232 | { |
304a0fcb | 2233 | guest_suspend(SUSPEND_MODE_HYBRID, errp); |
95f4f404 LC |
2234 | } |
2235 | ||
d2baff62 LE |
2236 | /* Transfer online/offline status between @vcpu and the guest system. |
2237 | * | |
2238 | * On input either @errp or *@errp must be NULL. | |
2239 | * | |
2240 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: | |
2241 | * - R: vcpu->logical_id | |
2242 | * - W: vcpu->online | |
2243 | * - W: vcpu->can_offline | |
2244 | * | |
2245 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: | |
2246 | * - R: vcpu->logical_id | |
2247 | * - R: vcpu->online | |
2248 | * | |
2249 | * Written members remain unmodified on error. | |
2250 | */ | |
2251 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, | |
b4bf912a | 2252 | char *dirpath, Error **errp) |
d2baff62 | 2253 | { |
b4bf912a IM |
2254 | int fd; |
2255 | int res; | |
d2baff62 | 2256 | int dirfd; |
b4bf912a | 2257 | static const char fn[] = "online"; |
d2baff62 | 2258 | |
d2baff62 LE |
2259 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
2260 | if (dirfd == -1) { | |
2261 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
b4bf912a IM |
2262 | return; |
2263 | } | |
d2baff62 | 2264 | |
b4bf912a IM |
2265 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); |
2266 | if (fd == -1) { | |
2267 | if (errno != ENOENT) { | |
2268 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); | |
2269 | } else if (sys2vcpu) { | |
2270 | vcpu->online = true; | |
2271 | vcpu->can_offline = false; | |
2272 | } else if (!vcpu->online) { | |
2273 | error_setg(errp, "logical processor #%" PRId64 " can't be " | |
2274 | "offlined", vcpu->logical_id); | |
2275 | } /* otherwise pretend successful re-onlining */ | |
2276 | } else { | |
2277 | unsigned char status; | |
2278 | ||
2279 | res = pread(fd, &status, 1, 0); | |
2280 | if (res == -1) { | |
2281 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); | |
2282 | } else if (res == 0) { | |
2283 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, | |
2284 | fn); | |
2285 | } else if (sys2vcpu) { | |
2286 | vcpu->online = (status != '0'); | |
2287 | vcpu->can_offline = true; | |
2288 | } else if (vcpu->online != (status != '0')) { | |
2289 | status = '0' + vcpu->online; | |
2290 | if (pwrite(fd, &status, 1, 0) == -1) { | |
2291 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, | |
2292 | fn); | |
2293 | } | |
2294 | } /* otherwise pretend successful re-(on|off)-lining */ | |
d2baff62 | 2295 | |
b4bf912a | 2296 | res = close(fd); |
d2baff62 LE |
2297 | g_assert(res == 0); |
2298 | } | |
2299 | ||
b4bf912a IM |
2300 | res = close(dirfd); |
2301 | g_assert(res == 0); | |
d2baff62 LE |
2302 | } |
2303 | ||
2304 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) | |
2305 | { | |
c3033fd3 | 2306 | GuestLogicalProcessorList *head, **tail; |
27e7de3c LM |
2307 | const char *cpu_dir = "/sys/devices/system/cpu"; |
2308 | const gchar *line; | |
2309 | g_autoptr(GDir) cpu_gdir = NULL; | |
d2baff62 LE |
2310 | Error *local_err = NULL; |
2311 | ||
d2baff62 | 2312 | head = NULL; |
c3033fd3 | 2313 | tail = &head; |
27e7de3c | 2314 | cpu_gdir = g_dir_open(cpu_dir, 0, NULL); |
d2baff62 | 2315 | |
27e7de3c LM |
2316 | if (cpu_gdir == NULL) { |
2317 | error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); | |
2318 | return NULL; | |
2319 | } | |
b4bf912a | 2320 | |
27e7de3c LM |
2321 | while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { |
2322 | GuestLogicalProcessor *vcpu; | |
2323 | int64_t id; | |
2324 | if (sscanf(line, "cpu%" PRId64, &id)) { | |
2325 | g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" | |
2326 | "cpu%" PRId64 "/", id); | |
b4bf912a IM |
2327 | vcpu = g_malloc0(sizeof *vcpu); |
2328 | vcpu->logical_id = id; | |
2329 | vcpu->has_can_offline = true; /* lolspeak ftw */ | |
2330 | transfer_vcpu(vcpu, true, path, &local_err); | |
c3033fd3 | 2331 | QAPI_LIST_APPEND(tail, vcpu); |
b4bf912a | 2332 | } |
d2baff62 LE |
2333 | } |
2334 | ||
2335 | if (local_err == NULL) { | |
2336 | /* there's no guest with zero VCPUs */ | |
2337 | g_assert(head != NULL); | |
2338 | return head; | |
2339 | } | |
2340 | ||
2341 | qapi_free_GuestLogicalProcessorList(head); | |
2342 | error_propagate(errp, local_err); | |
2343 | return NULL; | |
2344 | } | |
2345 | ||
cbb65fc2 LE |
2346 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
2347 | { | |
2348 | int64_t processed; | |
2349 | Error *local_err = NULL; | |
2350 | ||
2351 | processed = 0; | |
2352 | while (vcpus != NULL) { | |
b4bf912a IM |
2353 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", |
2354 | vcpus->value->logical_id); | |
2355 | ||
2356 | transfer_vcpu(vcpus->value, false, path, &local_err); | |
2357 | g_free(path); | |
cbb65fc2 LE |
2358 | if (local_err != NULL) { |
2359 | break; | |
2360 | } | |
2361 | ++processed; | |
2362 | vcpus = vcpus->next; | |
2363 | } | |
2364 | ||
2365 | if (local_err != NULL) { | |
2366 | if (processed == 0) { | |
2367 | error_propagate(errp, local_err); | |
2368 | } else { | |
2369 | error_free(local_err); | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | return processed; | |
2374 | } | |
2375 | ||
215a2771 DB |
2376 | void qmp_guest_set_user_password(const char *username, |
2377 | const char *password, | |
2378 | bool crypted, | |
2379 | Error **errp) | |
2380 | { | |
2381 | Error *local_err = NULL; | |
2382 | char *passwd_path = NULL; | |
2383 | pid_t pid; | |
2384 | int status; | |
2385 | int datafd[2] = { -1, -1 }; | |
2386 | char *rawpasswddata = NULL; | |
2387 | size_t rawpasswdlen; | |
2388 | char *chpasswddata = NULL; | |
2389 | size_t chpasswdlen; | |
2390 | ||
920639ca DB |
2391 | rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); |
2392 | if (!rawpasswddata) { | |
2393 | return; | |
2394 | } | |
215a2771 DB |
2395 | rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); |
2396 | rawpasswddata[rawpasswdlen] = '\0'; | |
2397 | ||
2398 | if (strchr(rawpasswddata, '\n')) { | |
2399 | error_setg(errp, "forbidden characters in raw password"); | |
2400 | goto out; | |
2401 | } | |
2402 | ||
2403 | if (strchr(username, '\n') || | |
2404 | strchr(username, ':')) { | |
2405 | error_setg(errp, "forbidden characters in username"); | |
2406 | goto out; | |
2407 | } | |
2408 | ||
2409 | chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); | |
2410 | chpasswdlen = strlen(chpasswddata); | |
2411 | ||
2412 | passwd_path = g_find_program_in_path("chpasswd"); | |
2413 | ||
2414 | if (!passwd_path) { | |
2415 | error_setg(errp, "cannot find 'passwd' program in PATH"); | |
2416 | goto out; | |
2417 | } | |
2418 | ||
ed78331d | 2419 | if (!g_unix_open_pipe(datafd, FD_CLOEXEC, NULL)) { |
215a2771 DB |
2420 | error_setg(errp, "cannot create pipe FDs"); |
2421 | goto out; | |
2422 | } | |
2423 | ||
2424 | pid = fork(); | |
2425 | if (pid == 0) { | |
2426 | close(datafd[1]); | |
2427 | /* child */ | |
2428 | setsid(); | |
2429 | dup2(datafd[0], 0); | |
2430 | reopen_fd_to_null(1); | |
2431 | reopen_fd_to_null(2); | |
2432 | ||
2433 | if (crypted) { | |
fcc41961 | 2434 | execl(passwd_path, "chpasswd", "-e", NULL); |
215a2771 | 2435 | } else { |
fcc41961 | 2436 | execl(passwd_path, "chpasswd", NULL); |
215a2771 DB |
2437 | } |
2438 | _exit(EXIT_FAILURE); | |
2439 | } else if (pid < 0) { | |
2440 | error_setg_errno(errp, errno, "failed to create child process"); | |
2441 | goto out; | |
2442 | } | |
2443 | close(datafd[0]); | |
2444 | datafd[0] = -1; | |
2445 | ||
2446 | if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { | |
2447 | error_setg_errno(errp, errno, "cannot write new account password"); | |
2448 | goto out; | |
2449 | } | |
2450 | close(datafd[1]); | |
2451 | datafd[1] = -1; | |
2452 | ||
2453 | ga_wait_child(pid, &status, &local_err); | |
2454 | if (local_err) { | |
2455 | error_propagate(errp, local_err); | |
2456 | goto out; | |
2457 | } | |
2458 | ||
2459 | if (!WIFEXITED(status)) { | |
2460 | error_setg(errp, "child process has terminated abnormally"); | |
2461 | goto out; | |
2462 | } | |
2463 | ||
2464 | if (WEXITSTATUS(status)) { | |
2465 | error_setg(errp, "child process has failed to set user password"); | |
2466 | goto out; | |
2467 | } | |
2468 | ||
2469 | out: | |
2470 | g_free(chpasswddata); | |
2471 | g_free(rawpasswddata); | |
2472 | g_free(passwd_path); | |
2473 | if (datafd[0] != -1) { | |
2474 | close(datafd[0]); | |
2475 | } | |
2476 | if (datafd[1] != -1) { | |
2477 | close(datafd[1]); | |
2478 | } | |
2479 | } | |
2480 | ||
bd240fca HZ |
2481 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, |
2482 | int size, Error **errp) | |
2483 | { | |
2484 | int fd; | |
2485 | int res; | |
2486 | ||
2487 | errno = 0; | |
2488 | fd = openat(dirfd, pathname, O_RDONLY); | |
2489 | if (fd == -1) { | |
2490 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2491 | return; | |
2492 | } | |
2493 | ||
2494 | res = pread(fd, buf, size, 0); | |
2495 | if (res == -1) { | |
2496 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); | |
2497 | } else if (res == 0) { | |
2498 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); | |
2499 | } | |
2500 | close(fd); | |
2501 | } | |
2502 | ||
2503 | static void ga_write_sysfs_file(int dirfd, const char *pathname, | |
2504 | const char *buf, int size, Error **errp) | |
2505 | { | |
2506 | int fd; | |
2507 | ||
2508 | errno = 0; | |
2509 | fd = openat(dirfd, pathname, O_WRONLY); | |
2510 | if (fd == -1) { | |
2511 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); | |
2512 | return; | |
2513 | } | |
2514 | ||
2515 | if (pwrite(fd, buf, size, 0) == -1) { | |
2516 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); | |
2517 | } | |
2518 | ||
2519 | close(fd); | |
2520 | } | |
2521 | ||
2522 | /* Transfer online/offline status between @mem_blk and the guest system. | |
2523 | * | |
2524 | * On input either @errp or *@errp must be NULL. | |
2525 | * | |
2526 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: | |
2527 | * - R: mem_blk->phys_index | |
2528 | * - W: mem_blk->online | |
2529 | * - W: mem_blk->can_offline | |
2530 | * | |
2531 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: | |
2532 | * - R: mem_blk->phys_index | |
2533 | * - R: mem_blk->online | |
2534 | *- R: mem_blk->can_offline | |
2535 | * Written members remain unmodified on error. | |
2536 | */ | |
2537 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, | |
2538 | GuestMemoryBlockResponse *result, | |
2539 | Error **errp) | |
2540 | { | |
2541 | char *dirpath; | |
2542 | int dirfd; | |
2543 | char *status; | |
2544 | Error *local_err = NULL; | |
2545 | ||
2546 | if (!sys2memblk) { | |
2547 | DIR *dp; | |
2548 | ||
2549 | if (!result) { | |
2550 | error_setg(errp, "Internal error, 'result' should not be NULL"); | |
2551 | return; | |
2552 | } | |
2553 | errno = 0; | |
2554 | dp = opendir("/sys/devices/system/memory/"); | |
2555 | /* if there is no 'memory' directory in sysfs, | |
2556 | * we think this VM does not support online/offline memory block, | |
2557 | * any other solution? | |
2558 | */ | |
9879f5ac PMD |
2559 | if (!dp) { |
2560 | if (errno == ENOENT) { | |
2561 | result->response = | |
2562 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2563 | } | |
bd240fca HZ |
2564 | goto out1; |
2565 | } | |
2566 | closedir(dp); | |
2567 | } | |
2568 | ||
2569 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", | |
2570 | mem_blk->phys_index); | |
2571 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2572 | if (dirfd == -1) { | |
2573 | if (sys2memblk) { | |
2574 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2575 | } else { | |
2576 | if (errno == ENOENT) { | |
2577 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; | |
2578 | } else { | |
2579 | result->response = | |
2580 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2581 | } | |
2582 | } | |
2583 | g_free(dirpath); | |
2584 | goto out1; | |
2585 | } | |
2586 | g_free(dirpath); | |
2587 | ||
2588 | status = g_malloc0(10); | |
2589 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); | |
2590 | if (local_err) { | |
2591 | /* treat with sysfs file that not exist in old kernel */ | |
2592 | if (errno == ENOENT) { | |
2593 | error_free(local_err); | |
2594 | if (sys2memblk) { | |
2595 | mem_blk->online = true; | |
2596 | mem_blk->can_offline = false; | |
2597 | } else if (!mem_blk->online) { | |
2598 | result->response = | |
2599 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; | |
2600 | } | |
2601 | } else { | |
2602 | if (sys2memblk) { | |
2603 | error_propagate(errp, local_err); | |
2604 | } else { | |
b368123d | 2605 | error_free(local_err); |
bd240fca HZ |
2606 | result->response = |
2607 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2608 | } | |
2609 | } | |
2610 | goto out2; | |
2611 | } | |
2612 | ||
2613 | if (sys2memblk) { | |
2614 | char removable = '0'; | |
2615 | ||
2616 | mem_blk->online = (strncmp(status, "online", 6) == 0); | |
2617 | ||
2618 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); | |
2619 | if (local_err) { | |
67cc32eb | 2620 | /* if no 'removable' file, it doesn't support offline mem blk */ |
bd240fca HZ |
2621 | if (errno == ENOENT) { |
2622 | error_free(local_err); | |
2623 | mem_blk->can_offline = false; | |
2624 | } else { | |
2625 | error_propagate(errp, local_err); | |
2626 | } | |
2627 | } else { | |
2628 | mem_blk->can_offline = (removable != '0'); | |
2629 | } | |
2630 | } else { | |
2631 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { | |
7064024d | 2632 | const char *new_state = mem_blk->online ? "online" : "offline"; |
bd240fca HZ |
2633 | |
2634 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), | |
2635 | &local_err); | |
bd240fca HZ |
2636 | if (local_err) { |
2637 | error_free(local_err); | |
2638 | result->response = | |
2639 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; | |
2640 | goto out2; | |
2641 | } | |
2642 | ||
2643 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; | |
2644 | result->has_error_code = false; | |
2645 | } /* otherwise pretend successful re-(on|off)-lining */ | |
2646 | } | |
2647 | g_free(status); | |
2648 | close(dirfd); | |
2649 | return; | |
2650 | ||
2651 | out2: | |
2652 | g_free(status); | |
2653 | close(dirfd); | |
2654 | out1: | |
2655 | if (!sys2memblk) { | |
2656 | result->has_error_code = true; | |
2657 | result->error_code = errno; | |
2658 | } | |
2659 | } | |
2660 | ||
a065aaa9 HZ |
2661 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
2662 | { | |
c3033fd3 | 2663 | GuestMemoryBlockList *head, **tail; |
bd240fca HZ |
2664 | Error *local_err = NULL; |
2665 | struct dirent *de; | |
2666 | DIR *dp; | |
2667 | ||
2668 | head = NULL; | |
c3033fd3 | 2669 | tail = &head; |
bd240fca HZ |
2670 | |
2671 | dp = opendir("/sys/devices/system/memory/"); | |
2672 | if (!dp) { | |
f693fe6e MR |
2673 | /* it's ok if this happens to be a system that doesn't expose |
2674 | * memory blocks via sysfs, but otherwise we should report | |
2675 | * an error | |
2676 | */ | |
2677 | if (errno != ENOENT) { | |
2678 | error_setg_errno(errp, errno, "Can't open directory" | |
9af9e0fe | 2679 | "\"/sys/devices/system/memory/\""); |
f693fe6e | 2680 | } |
bd240fca HZ |
2681 | return NULL; |
2682 | } | |
2683 | ||
2684 | /* Note: the phys_index of memory block may be discontinuous, | |
2685 | * this is because a memblk is the unit of the Sparse Memory design, which | |
2686 | * allows discontinuous memory ranges (ex. NUMA), so here we should | |
2687 | * traverse the memory block directory. | |
2688 | */ | |
2689 | while ((de = readdir(dp)) != NULL) { | |
2690 | GuestMemoryBlock *mem_blk; | |
bd240fca HZ |
2691 | |
2692 | if ((strncmp(de->d_name, "memory", 6) != 0) || | |
2693 | !(de->d_type & DT_DIR)) { | |
2694 | continue; | |
2695 | } | |
2696 | ||
2697 | mem_blk = g_malloc0(sizeof *mem_blk); | |
2698 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ | |
2699 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); | |
2700 | mem_blk->has_can_offline = true; /* lolspeak ftw */ | |
2701 | transfer_memory_block(mem_blk, true, NULL, &local_err); | |
4155c998 MA |
2702 | if (local_err) { |
2703 | break; | |
2704 | } | |
bd240fca | 2705 | |
c3033fd3 | 2706 | QAPI_LIST_APPEND(tail, mem_blk); |
bd240fca HZ |
2707 | } |
2708 | ||
2709 | closedir(dp); | |
2710 | if (local_err == NULL) { | |
2711 | /* there's no guest with zero memory blocks */ | |
2712 | if (head == NULL) { | |
2713 | error_setg(errp, "guest reported zero memory blocks!"); | |
2714 | } | |
2715 | return head; | |
2716 | } | |
2717 | ||
2718 | qapi_free_GuestMemoryBlockList(head); | |
2719 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2720 | return NULL; |
2721 | } | |
2722 | ||
2723 | GuestMemoryBlockResponseList * | |
2724 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
2725 | { | |
c3033fd3 | 2726 | GuestMemoryBlockResponseList *head, **tail; |
32ca7927 HZ |
2727 | Error *local_err = NULL; |
2728 | ||
2729 | head = NULL; | |
c3033fd3 | 2730 | tail = &head; |
32ca7927 HZ |
2731 | |
2732 | while (mem_blks != NULL) { | |
2733 | GuestMemoryBlockResponse *result; | |
32ca7927 HZ |
2734 | GuestMemoryBlock *current_mem_blk = mem_blks->value; |
2735 | ||
2736 | result = g_malloc0(sizeof(*result)); | |
2737 | result->phys_index = current_mem_blk->phys_index; | |
2738 | transfer_memory_block(current_mem_blk, false, result, &local_err); | |
2739 | if (local_err) { /* should never happen */ | |
2740 | goto err; | |
2741 | } | |
32ca7927 | 2742 | |
c3033fd3 | 2743 | QAPI_LIST_APPEND(tail, result); |
32ca7927 HZ |
2744 | mem_blks = mem_blks->next; |
2745 | } | |
2746 | ||
2747 | return head; | |
2748 | err: | |
2749 | qapi_free_GuestMemoryBlockResponseList(head); | |
2750 | error_propagate(errp, local_err); | |
a065aaa9 HZ |
2751 | return NULL; |
2752 | } | |
2753 | ||
2754 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
2755 | { | |
ef82b60b HZ |
2756 | Error *local_err = NULL; |
2757 | char *dirpath; | |
2758 | int dirfd; | |
2759 | char *buf; | |
2760 | GuestMemoryBlockInfo *info; | |
2761 | ||
2762 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); | |
2763 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); | |
2764 | if (dirfd == -1) { | |
2765 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); | |
2766 | g_free(dirpath); | |
2767 | return NULL; | |
2768 | } | |
2769 | g_free(dirpath); | |
2770 | ||
2771 | buf = g_malloc0(20); | |
2772 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); | |
8ce1ee46 | 2773 | close(dirfd); |
ef82b60b HZ |
2774 | if (local_err) { |
2775 | g_free(buf); | |
2776 | error_propagate(errp, local_err); | |
2777 | return NULL; | |
2778 | } | |
2779 | ||
2780 | info = g_new0(GuestMemoryBlockInfo, 1); | |
2781 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ | |
2782 | ||
2783 | g_free(buf); | |
2784 | ||
2785 | return info; | |
a065aaa9 HZ |
2786 | } |
2787 | ||
3569664e | 2788 | #define MAX_NAME_LEN 128 |
2789 | static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) | |
2790 | { | |
2791 | #ifdef CONFIG_LINUX | |
2792 | GuestDiskStatsInfoList *head = NULL, **tail = &head; | |
2793 | const char *diskstats = "/proc/diskstats"; | |
2794 | FILE *fp; | |
2795 | size_t n; | |
2796 | char *line = NULL; | |
2797 | ||
2798 | fp = fopen(diskstats, "r"); | |
2799 | if (fp == NULL) { | |
2800 | error_setg_errno(errp, errno, "open(\"%s\")", diskstats); | |
2801 | return NULL; | |
2802 | } | |
2803 | ||
2804 | while (getline(&line, &n, fp) != -1) { | |
2805 | g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; | |
2806 | g_autofree GuestDiskStats *diskstat = NULL; | |
2807 | char dev_name[MAX_NAME_LEN]; | |
2808 | unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; | |
2809 | unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; | |
2810 | unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; | |
2811 | unsigned long dc_ios, dc_merges, dc_sec, fl_ios; | |
2812 | unsigned int major, minor; | |
2813 | int i; | |
2814 | ||
2815 | i = sscanf(line, "%u %u %s %lu %lu %lu" | |
2816 | "%lu %lu %lu %lu %u %u %u %u" | |
2817 | "%lu %lu %lu %u %lu %u", | |
2818 | &major, &minor, dev_name, | |
2819 | &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, | |
2820 | &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, | |
2821 | &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, | |
2822 | &dc_ios, &dc_merges, &dc_sec, &dc_ticks, | |
2823 | &fl_ios, &fl_ticks); | |
2824 | ||
2825 | if (i < 7) { | |
2826 | continue; | |
2827 | } | |
2828 | ||
2829 | diskstatinfo = g_new0(GuestDiskStatsInfo, 1); | |
2830 | diskstatinfo->name = g_strdup(dev_name); | |
2831 | diskstatinfo->major = major; | |
2832 | diskstatinfo->minor = minor; | |
2833 | ||
2834 | diskstat = g_new0(GuestDiskStats, 1); | |
2835 | if (i == 7) { | |
2836 | diskstat->has_read_ios = true; | |
2837 | diskstat->read_ios = rd_ios; | |
2838 | diskstat->has_read_sectors = true; | |
2839 | diskstat->read_sectors = rd_merges_or_rd_sec; | |
2840 | diskstat->has_write_ios = true; | |
2841 | diskstat->write_ios = rd_sec_or_wr_ios; | |
2842 | diskstat->has_write_sectors = true; | |
2843 | diskstat->write_sectors = rd_ticks_or_wr_sec; | |
2844 | } | |
2845 | if (i >= 14) { | |
2846 | diskstat->has_read_ios = true; | |
2847 | diskstat->read_ios = rd_ios; | |
2848 | diskstat->has_read_sectors = true; | |
2849 | diskstat->read_sectors = rd_sec_or_wr_ios; | |
2850 | diskstat->has_read_merges = true; | |
2851 | diskstat->read_merges = rd_merges_or_rd_sec; | |
2852 | diskstat->has_read_ticks = true; | |
2853 | diskstat->read_ticks = rd_ticks_or_wr_sec; | |
2854 | diskstat->has_write_ios = true; | |
2855 | diskstat->write_ios = wr_ios; | |
2856 | diskstat->has_write_sectors = true; | |
2857 | diskstat->write_sectors = wr_sec; | |
2858 | diskstat->has_write_merges = true; | |
2859 | diskstat->write_merges = wr_merges; | |
2860 | diskstat->has_write_ticks = true; | |
2861 | diskstat->write_ticks = wr_ticks; | |
2862 | diskstat->has_ios_pgr = true; | |
2863 | diskstat->ios_pgr = ios_pgr; | |
2864 | diskstat->has_total_ticks = true; | |
2865 | diskstat->total_ticks = tot_ticks; | |
2866 | diskstat->has_weight_ticks = true; | |
2867 | diskstat->weight_ticks = rq_ticks; | |
2868 | } | |
2869 | if (i >= 18) { | |
2870 | diskstat->has_discard_ios = true; | |
2871 | diskstat->discard_ios = dc_ios; | |
2872 | diskstat->has_discard_merges = true; | |
2873 | diskstat->discard_merges = dc_merges; | |
2874 | diskstat->has_discard_sectors = true; | |
2875 | diskstat->discard_sectors = dc_sec; | |
2876 | diskstat->has_discard_ticks = true; | |
2877 | diskstat->discard_ticks = dc_ticks; | |
2878 | } | |
2879 | if (i >= 20) { | |
2880 | diskstat->has_flush_ios = true; | |
2881 | diskstat->flush_ios = fl_ios; | |
2882 | diskstat->has_flush_ticks = true; | |
2883 | diskstat->flush_ticks = fl_ticks; | |
2884 | } | |
2885 | ||
2886 | diskstatinfo->stats = g_steal_pointer(&diskstat); | |
2887 | QAPI_LIST_APPEND(tail, diskstatinfo); | |
2888 | diskstatinfo = NULL; | |
2889 | } | |
2890 | free(line); | |
2891 | fclose(fp); | |
2892 | return head; | |
2893 | #else | |
2894 | g_debug("disk stats reporting available only for Linux"); | |
2895 | return NULL; | |
2896 | #endif | |
2897 | } | |
2898 | ||
2899 | GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) | |
2900 | { | |
2901 | return guest_get_diskstats(errp); | |
2902 | } | |
2903 | ||
1db8a0b0 ZP |
2904 | GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) |
2905 | { | |
2906 | GuestCpuStatsList *head = NULL, **tail = &head; | |
2907 | const char *cpustats = "/proc/stat"; | |
2908 | int clk_tck = sysconf(_SC_CLK_TCK); | |
2909 | FILE *fp; | |
2910 | size_t n; | |
2911 | char *line = NULL; | |
2912 | ||
2913 | fp = fopen(cpustats, "r"); | |
2914 | if (fp == NULL) { | |
2915 | error_setg_errno(errp, errno, "open(\"%s\")", cpustats); | |
2916 | return NULL; | |
2917 | } | |
2918 | ||
2919 | while (getline(&line, &n, fp) != -1) { | |
2920 | GuestCpuStats *cpustat = NULL; | |
2921 | GuestLinuxCpuStats *linuxcpustat; | |
2922 | int i; | |
2923 | unsigned long user, system, idle, iowait, irq, softirq, steal, guest; | |
2924 | unsigned long nice, guest_nice; | |
2925 | char name[64]; | |
2926 | ||
2927 | i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", | |
2928 | name, &user, &nice, &system, &idle, &iowait, &irq, &softirq, | |
2929 | &steal, &guest, &guest_nice); | |
2930 | ||
2931 | /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */ | |
2932 | if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) { | |
2933 | continue; | |
2934 | } | |
2935 | ||
2936 | if (i < 5) { | |
2937 | slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats); | |
2938 | break; | |
2939 | } | |
2940 | ||
2941 | cpustat = g_new0(GuestCpuStats, 1); | |
2942 | cpustat->type = GUEST_CPU_STATS_TYPE_LINUX; | |
2943 | ||
2944 | linuxcpustat = &cpustat->u.q_linux; | |
2945 | linuxcpustat->cpu = atoi(&name[3]); | |
2946 | linuxcpustat->user = user * 1000 / clk_tck; | |
2947 | linuxcpustat->nice = nice * 1000 / clk_tck; | |
2948 | linuxcpustat->system = system * 1000 / clk_tck; | |
2949 | linuxcpustat->idle = idle * 1000 / clk_tck; | |
2950 | ||
2951 | if (i > 5) { | |
2952 | linuxcpustat->has_iowait = true; | |
2953 | linuxcpustat->iowait = iowait * 1000 / clk_tck; | |
2954 | } | |
2955 | ||
2956 | if (i > 6) { | |
2957 | linuxcpustat->has_irq = true; | |
2958 | linuxcpustat->irq = irq * 1000 / clk_tck; | |
2959 | linuxcpustat->has_softirq = true; | |
2960 | linuxcpustat->softirq = softirq * 1000 / clk_tck; | |
2961 | } | |
2962 | ||
2963 | if (i > 8) { | |
2964 | linuxcpustat->has_steal = true; | |
2965 | linuxcpustat->steal = steal * 1000 / clk_tck; | |
2966 | } | |
2967 | ||
2968 | if (i > 9) { | |
2969 | linuxcpustat->has_guest = true; | |
2970 | linuxcpustat->guest = guest * 1000 / clk_tck; | |
2971 | } | |
2972 | ||
2973 | if (i > 10) { | |
2974 | linuxcpustat->has_guest = true; | |
2975 | linuxcpustat->guest = guest * 1000 / clk_tck; | |
2976 | linuxcpustat->has_guestnice = true; | |
2977 | linuxcpustat->guestnice = guest_nice * 1000 / clk_tck; | |
2978 | } | |
2979 | ||
2980 | QAPI_LIST_APPEND(tail, cpustat); | |
2981 | } | |
2982 | ||
2983 | free(line); | |
2984 | fclose(fp); | |
2985 | return head; | |
2986 | } | |
2987 | ||
e72c3f2e MR |
2988 | #else /* defined(__linux__) */ |
2989 | ||
77dbc81b | 2990 | void qmp_guest_suspend_disk(Error **errp) |
e72c3f2e | 2991 | { |
c6bd8c70 | 2992 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2993 | } |
2994 | ||
77dbc81b | 2995 | void qmp_guest_suspend_ram(Error **errp) |
e72c3f2e | 2996 | { |
c6bd8c70 | 2997 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
2998 | } |
2999 | ||
77dbc81b | 3000 | void qmp_guest_suspend_hybrid(Error **errp) |
e72c3f2e | 3001 | { |
c6bd8c70 | 3002 | error_setg(errp, QERR_UNSUPPORTED); |
e72c3f2e MR |
3003 | } |
3004 | ||
d2baff62 LE |
3005 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
3006 | { | |
c6bd8c70 | 3007 | error_setg(errp, QERR_UNSUPPORTED); |
d2baff62 LE |
3008 | return NULL; |
3009 | } | |
3010 | ||
cbb65fc2 LE |
3011 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
3012 | { | |
c6bd8c70 | 3013 | error_setg(errp, QERR_UNSUPPORTED); |
cbb65fc2 LE |
3014 | return -1; |
3015 | } | |
3016 | ||
215a2771 DB |
3017 | void qmp_guest_set_user_password(const char *username, |
3018 | const char *password, | |
3019 | bool crypted, | |
3020 | Error **errp) | |
3021 | { | |
c6bd8c70 | 3022 | error_setg(errp, QERR_UNSUPPORTED); |
215a2771 DB |
3023 | } |
3024 | ||
a065aaa9 HZ |
3025 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
3026 | { | |
c6bd8c70 | 3027 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3028 | return NULL; |
3029 | } | |
3030 | ||
3031 | GuestMemoryBlockResponseList * | |
3032 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) | |
3033 | { | |
c6bd8c70 | 3034 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3035 | return NULL; |
3036 | } | |
3037 | ||
3038 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) | |
3039 | { | |
c6bd8c70 | 3040 | error_setg(errp, QERR_UNSUPPORTED); |
a065aaa9 HZ |
3041 | return NULL; |
3042 | } | |
3043 | ||
d35d4cb5 MR |
3044 | #endif |
3045 | ||
59e35c7b AD |
3046 | #ifdef HAVE_GETIFADDRS |
3047 | static GuestNetworkInterface * | |
3048 | guest_find_interface(GuestNetworkInterfaceList *head, | |
3049 | const char *name) | |
3050 | { | |
3051 | for (; head; head = head->next) { | |
3052 | if (strcmp(head->value->name, name) == 0) { | |
3053 | return head->value; | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | return NULL; | |
3058 | } | |
3059 | ||
3060 | static int guest_get_network_stats(const char *name, | |
3061 | GuestNetworkInterfaceStat *stats) | |
3062 | { | |
70335c46 | 3063 | #ifdef CONFIG_LINUX |
59e35c7b AD |
3064 | int name_len; |
3065 | char const *devinfo = "/proc/net/dev"; | |
3066 | FILE *fp; | |
3067 | char *line = NULL, *colon; | |
3068 | size_t n = 0; | |
3069 | fp = fopen(devinfo, "r"); | |
3070 | if (!fp) { | |
a539dc8a AD |
3071 | g_debug("failed to open network stats %s: %s", devinfo, |
3072 | g_strerror(errno)); | |
59e35c7b AD |
3073 | return -1; |
3074 | } | |
3075 | name_len = strlen(name); | |
3076 | while (getline(&line, &n, fp) != -1) { | |
3077 | long long dummy; | |
3078 | long long rx_bytes; | |
3079 | long long rx_packets; | |
3080 | long long rx_errs; | |
3081 | long long rx_dropped; | |
3082 | long long tx_bytes; | |
3083 | long long tx_packets; | |
3084 | long long tx_errs; | |
3085 | long long tx_dropped; | |
3086 | char *trim_line; | |
3087 | trim_line = g_strchug(line); | |
3088 | if (trim_line[0] == '\0') { | |
3089 | continue; | |
3090 | } | |
3091 | colon = strchr(trim_line, ':'); | |
3092 | if (!colon) { | |
3093 | continue; | |
3094 | } | |
3095 | if (colon - name_len == trim_line && | |
3096 | strncmp(trim_line, name, name_len) == 0) { | |
3097 | if (sscanf(colon + 1, | |
3098 | "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld", | |
3099 | &rx_bytes, &rx_packets, &rx_errs, &rx_dropped, | |
3100 | &dummy, &dummy, &dummy, &dummy, | |
3101 | &tx_bytes, &tx_packets, &tx_errs, &tx_dropped, | |
3102 | &dummy, &dummy, &dummy, &dummy) != 16) { | |
3103 | continue; | |
3104 | } | |
3105 | stats->rx_bytes = rx_bytes; | |
3106 | stats->rx_packets = rx_packets; | |
3107 | stats->rx_errs = rx_errs; | |
3108 | stats->rx_dropped = rx_dropped; | |
3109 | stats->tx_bytes = tx_bytes; | |
3110 | stats->tx_packets = tx_packets; | |
3111 | stats->tx_errs = tx_errs; | |
3112 | stats->tx_dropped = tx_dropped; | |
3113 | fclose(fp); | |
3114 | g_free(line); | |
3115 | return 0; | |
3116 | } | |
3117 | } | |
3118 | fclose(fp); | |
3119 | g_free(line); | |
3120 | g_debug("/proc/net/dev: Interface '%s' not found", name); | |
a539dc8a AD |
3121 | #else /* !CONFIG_LINUX */ |
3122 | g_debug("Network stats reporting available only for Linux"); | |
3123 | #endif /* !CONFIG_LINUX */ | |
59e35c7b AD |
3124 | return -1; |
3125 | } | |
3126 | ||
3127 | /* | |
3128 | * Build information about guest interfaces | |
3129 | */ | |
3130 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
3131 | { | |
3132 | GuestNetworkInterfaceList *head = NULL, **tail = &head; | |
3133 | struct ifaddrs *ifap, *ifa; | |
3134 | ||
3135 | if (getifaddrs(&ifap) < 0) { | |
3136 | error_setg_errno(errp, errno, "getifaddrs failed"); | |
3137 | goto error; | |
3138 | } | |
3139 | ||
3140 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |
3141 | GuestNetworkInterface *info; | |
3142 | GuestIpAddressList **address_tail; | |
3143 | GuestIpAddress *address_item = NULL; | |
3144 | GuestNetworkInterfaceStat *interface_stat = NULL; | |
3145 | char addr4[INET_ADDRSTRLEN]; | |
3146 | char addr6[INET6_ADDRSTRLEN]; | |
3147 | int sock; | |
3148 | struct ifreq ifr; | |
3149 | unsigned char *mac_addr; | |
3150 | void *p; | |
3151 | ||
3152 | g_debug("Processing %s interface", ifa->ifa_name); | |
3153 | ||
3154 | info = guest_find_interface(head, ifa->ifa_name); | |
3155 | ||
3156 | if (!info) { | |
3157 | info = g_malloc0(sizeof(*info)); | |
3158 | info->name = g_strdup(ifa->ifa_name); | |
3159 | ||
3160 | QAPI_LIST_APPEND(tail, info); | |
3161 | } | |
3162 | ||
aec0730e | 3163 | if (!info->has_hardware_address) { |
59e35c7b AD |
3164 | /* we haven't obtained HW address yet */ |
3165 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
3166 | if (sock == -1) { | |
3167 | error_setg_errno(errp, errno, "failed to create socket"); | |
3168 | goto error; | |
3169 | } | |
3170 | ||
3171 | memset(&ifr, 0, sizeof(ifr)); | |
3172 | pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->name); | |
3173 | if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { | |
aec0730e AD |
3174 | /* |
3175 | * We can't get the hw addr of this interface, but that's not a | |
3176 | * fatal error. Don't set info->hardware_address, but keep | |
3177 | * going. | |
3178 | */ | |
3179 | if (errno == EADDRNOTAVAIL) { | |
3180 | /* The interface doesn't have a hw addr (e.g. loopback). */ | |
3181 | g_debug("failed to get MAC address of %s: %s", | |
3182 | ifa->ifa_name, strerror(errno)); | |
3183 | } else{ | |
3184 | g_warning("failed to get MAC address of %s: %s", | |
3185 | ifa->ifa_name, strerror(errno)); | |
3186 | } | |
59e35c7b | 3187 | |
aec0730e | 3188 | } else { |
70335c46 AD |
3189 | #ifdef CONFIG_SOLARIS |
3190 | mac_addr = (unsigned char *) &ifr.ifr_addr.sa_data; | |
3191 | #else | |
aec0730e | 3192 | mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data; |
70335c46 | 3193 | #endif |
aec0730e AD |
3194 | info->hardware_address = |
3195 | g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", | |
3196 | (int) mac_addr[0], (int) mac_addr[1], | |
3197 | (int) mac_addr[2], (int) mac_addr[3], | |
3198 | (int) mac_addr[4], (int) mac_addr[5]); | |
59e35c7b | 3199 | |
aec0730e AD |
3200 | info->has_hardware_address = true; |
3201 | } | |
3202 | close(sock); | |
59e35c7b AD |
3203 | } |
3204 | ||
3205 | if (ifa->ifa_addr && | |
3206 | ifa->ifa_addr->sa_family == AF_INET) { | |
3207 | /* interface with IPv4 address */ | |
3208 | p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; | |
3209 | if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { | |
3210 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
3211 | goto error; | |
3212 | } | |
3213 | ||
3214 | address_item = g_malloc0(sizeof(*address_item)); | |
3215 | address_item->ip_address = g_strdup(addr4); | |
3216 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; | |
3217 | ||
3218 | if (ifa->ifa_netmask) { | |
3219 | /* Count the number of set bits in netmask. | |
3220 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
3221 | p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; | |
3222 | address_item->prefix = ctpop32(((uint32_t *) p)[0]); | |
3223 | } | |
3224 | } else if (ifa->ifa_addr && | |
3225 | ifa->ifa_addr->sa_family == AF_INET6) { | |
3226 | /* interface with IPv6 address */ | |
3227 | p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; | |
3228 | if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { | |
3229 | error_setg_errno(errp, errno, "inet_ntop failed"); | |
3230 | goto error; | |
3231 | } | |
3232 | ||
3233 | address_item = g_malloc0(sizeof(*address_item)); | |
3234 | address_item->ip_address = g_strdup(addr6); | |
3235 | address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; | |
3236 | ||
3237 | if (ifa->ifa_netmask) { | |
3238 | /* Count the number of set bits in netmask. | |
3239 | * This is safe as '1' and '0' cannot be shuffled in netmask. */ | |
3240 | p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; | |
3241 | address_item->prefix = | |
3242 | ctpop32(((uint32_t *) p)[0]) + | |
3243 | ctpop32(((uint32_t *) p)[1]) + | |
3244 | ctpop32(((uint32_t *) p)[2]) + | |
3245 | ctpop32(((uint32_t *) p)[3]); | |
3246 | } | |
3247 | } | |
3248 | ||
3249 | if (!address_item) { | |
3250 | continue; | |
3251 | } | |
3252 | ||
3253 | address_tail = &info->ip_addresses; | |
3254 | while (*address_tail) { | |
3255 | address_tail = &(*address_tail)->next; | |
3256 | } | |
3257 | QAPI_LIST_APPEND(address_tail, address_item); | |
3258 | ||
3259 | info->has_ip_addresses = true; | |
3260 | ||
3261 | if (!info->has_statistics) { | |
3262 | interface_stat = g_malloc0(sizeof(*interface_stat)); | |
3263 | if (guest_get_network_stats(info->name, interface_stat) == -1) { | |
3264 | info->has_statistics = false; | |
3265 | g_free(interface_stat); | |
3266 | } else { | |
3267 | info->statistics = interface_stat; | |
3268 | info->has_statistics = true; | |
3269 | } | |
3270 | } | |
3271 | } | |
3272 | ||
3273 | freeifaddrs(ifap); | |
3274 | return head; | |
3275 | ||
3276 | error: | |
3277 | freeifaddrs(ifap); | |
3278 | qapi_free_GuestNetworkInterfaceList(head); | |
3279 | return NULL; | |
3280 | } | |
3281 | ||
3282 | #else | |
3283 | ||
3284 | GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) | |
3285 | { | |
3286 | error_setg(errp, QERR_UNSUPPORTED); | |
3287 | return NULL; | |
3288 | } | |
3289 | ||
3290 | #endif /* HAVE_GETIFADDRS */ | |
3291 | ||
d35d4cb5 MR |
3292 | #if !defined(CONFIG_FSFREEZE) |
3293 | ||
46d4c572 TS |
3294 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) |
3295 | { | |
c6bd8c70 | 3296 | error_setg(errp, QERR_UNSUPPORTED); |
46d4c572 TS |
3297 | return NULL; |
3298 | } | |
3299 | ||
77dbc81b | 3300 | GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) |
e72c3f2e | 3301 | { |
c6bd8c70 | 3302 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3303 | |
3304 | return 0; | |
e72c3f2e MR |
3305 | } |
3306 | ||
77dbc81b | 3307 | int64_t qmp_guest_fsfreeze_freeze(Error **errp) |
e72c3f2e | 3308 | { |
c6bd8c70 | 3309 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3310 | |
3311 | return 0; | |
e72c3f2e MR |
3312 | } |
3313 | ||
e99bce20 TS |
3314 | int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, |
3315 | strList *mountpoints, | |
3316 | Error **errp) | |
3317 | { | |
c6bd8c70 | 3318 | error_setg(errp, QERR_UNSUPPORTED); |
e99bce20 TS |
3319 | |
3320 | return 0; | |
3321 | } | |
3322 | ||
77dbc81b | 3323 | int64_t qmp_guest_fsfreeze_thaw(Error **errp) |
e72c3f2e | 3324 | { |
c6bd8c70 | 3325 | error_setg(errp, QERR_UNSUPPORTED); |
d35d4cb5 MR |
3326 | |
3327 | return 0; | |
e72c3f2e | 3328 | } |
fed39564 TG |
3329 | |
3330 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) | |
3331 | { | |
3332 | error_setg(errp, QERR_UNSUPPORTED); | |
3333 | return NULL; | |
3334 | } | |
3335 | ||
3569664e | 3336 | GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) |
3337 | { | |
3338 | error_setg(errp, QERR_UNSUPPORTED); | |
3339 | return NULL; | |
3340 | } | |
3341 | ||
1db8a0b0 ZP |
3342 | GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) |
3343 | { | |
3344 | error_setg(errp, QERR_UNSUPPORTED); | |
3345 | return NULL; | |
3346 | } | |
3569664e | 3347 | |
eab5fd59 PB |
3348 | #endif /* CONFIG_FSFREEZE */ |
3349 | ||
3350 | #if !defined(CONFIG_FSTRIM) | |
e82855d9 JO |
3351 | GuestFilesystemTrimResponse * |
3352 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) | |
eab5fd59 | 3353 | { |
c6bd8c70 | 3354 | error_setg(errp, QERR_UNSUPPORTED); |
e82855d9 | 3355 | return NULL; |
eab5fd59 | 3356 | } |
e72c3f2e MR |
3357 | #endif |
3358 | ||
0e4ef702 TH |
3359 | /* add unsupported commands to the list of blocked RPCs */ |
3360 | GList *ga_command_init_blockedrpcs(GList *blockedrpcs) | |
1281c08a TS |
3361 | { |
3362 | #if !defined(__linux__) | |
3363 | { | |
3364 | const char *list[] = { | |
3365 | "guest-suspend-disk", "guest-suspend-ram", | |
59e35c7b | 3366 | "guest-suspend-hybrid", "guest-get-vcpus", "guest-set-vcpus", |
0dd38a03 | 3367 | "guest-get-memory-blocks", "guest-set-memory-blocks", |
28d8dd35 BS |
3368 | "guest-get-memory-block-size", "guest-get-memory-block-info", |
3369 | NULL}; | |
1281c08a TS |
3370 | char **p = (char **)list; |
3371 | ||
3372 | while (*p) { | |
0e4ef702 | 3373 | blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++)); |
1281c08a TS |
3374 | } |
3375 | } | |
3376 | #endif | |
3377 | ||
59e35c7b | 3378 | #if !defined(HAVE_GETIFADDRS) |
0e4ef702 | 3379 | blockedrpcs = g_list_append(blockedrpcs, |
59e35c7b AD |
3380 | g_strdup("guest-network-get-interfaces")); |
3381 | #endif | |
3382 | ||
1281c08a TS |
3383 | #if !defined(CONFIG_FSFREEZE) |
3384 | { | |
3385 | const char *list[] = { | |
3386 | "guest-get-fsinfo", "guest-fsfreeze-status", | |
3387 | "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", | |
fed39564 TG |
3388 | "guest-fsfreeze-thaw", "guest-get-fsinfo", |
3389 | "guest-get-disks", NULL}; | |
1281c08a TS |
3390 | char **p = (char **)list; |
3391 | ||
3392 | while (*p) { | |
0e4ef702 | 3393 | blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++)); |
1281c08a TS |
3394 | } |
3395 | } | |
3396 | #endif | |
3397 | ||
3398 | #if !defined(CONFIG_FSTRIM) | |
0e4ef702 | 3399 | blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-fstrim")); |
1281c08a TS |
3400 | #endif |
3401 | ||
0e4ef702 | 3402 | blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-get-devices")); |
2e4211ce | 3403 | |
0e4ef702 | 3404 | return blockedrpcs; |
1281c08a TS |
3405 | } |
3406 | ||
e3d4d252 MR |
3407 | /* register init/cleanup routines for stateful command groups */ |
3408 | void ga_command_state_init(GAState *s, GACommandState *cs) | |
3409 | { | |
7006b9cf | 3410 | #if defined(CONFIG_FSFREEZE) |
f22d85e9 | 3411 | ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); |
7006b9cf | 3412 | #endif |
e3d4d252 | 3413 | } |
161a56a9 | 3414 | |
e674605f TG |
3415 | #ifdef HAVE_UTMPX |
3416 | ||
161a56a9 VF |
3417 | #define QGA_MICRO_SECOND_TO_SECOND 1000000 |
3418 | ||
3419 | static double ga_get_login_time(struct utmpx *user_info) | |
3420 | { | |
3421 | double seconds = (double)user_info->ut_tv.tv_sec; | |
3422 | double useconds = (double)user_info->ut_tv.tv_usec; | |
3423 | useconds /= QGA_MICRO_SECOND_TO_SECOND; | |
3424 | return seconds + useconds; | |
3425 | } | |
3426 | ||
b90abbac | 3427 | GuestUserList *qmp_guest_get_users(Error **errp) |
161a56a9 VF |
3428 | { |
3429 | GHashTable *cache = NULL; | |
95b3a8c8 | 3430 | GuestUserList *head = NULL, **tail = &head; |
161a56a9 VF |
3431 | struct utmpx *user_info = NULL; |
3432 | gpointer value = NULL; | |
3433 | GuestUser *user = NULL; | |
161a56a9 VF |
3434 | double login_time = 0; |
3435 | ||
3436 | cache = g_hash_table_new(g_str_hash, g_str_equal); | |
3437 | setutxent(); | |
3438 | ||
3439 | for (;;) { | |
3440 | user_info = getutxent(); | |
3441 | if (user_info == NULL) { | |
3442 | break; | |
3443 | } else if (user_info->ut_type != USER_PROCESS) { | |
3444 | continue; | |
3445 | } else if (g_hash_table_contains(cache, user_info->ut_user)) { | |
3446 | value = g_hash_table_lookup(cache, user_info->ut_user); | |
3447 | user = (GuestUser *)value; | |
3448 | login_time = ga_get_login_time(user_info); | |
3449 | /* We're ensuring the earliest login time to be sent */ | |
3450 | if (login_time < user->login_time) { | |
3451 | user->login_time = login_time; | |
3452 | } | |
3453 | continue; | |
3454 | } | |
3455 | ||
95b3a8c8 EB |
3456 | user = g_new0(GuestUser, 1); |
3457 | user->user = g_strdup(user_info->ut_user); | |
3458 | user->login_time = ga_get_login_time(user_info); | |
161a56a9 | 3459 | |
95b3a8c8 | 3460 | g_hash_table_insert(cache, user->user, user); |
161a56a9 | 3461 | |
95b3a8c8 | 3462 | QAPI_LIST_APPEND(tail, user); |
161a56a9 VF |
3463 | } |
3464 | endutxent(); | |
3465 | g_hash_table_destroy(cache); | |
3466 | return head; | |
3467 | } | |
e674605f TG |
3468 | |
3469 | #else | |
3470 | ||
3471 | GuestUserList *qmp_guest_get_users(Error **errp) | |
3472 | { | |
3473 | error_setg(errp, QERR_UNSUPPORTED); | |
3474 | return NULL; | |
3475 | } | |
3476 | ||
3477 | #endif | |
9848f797 TG |
3478 | |
3479 | /* Replace escaped special characters with theire real values. The replacement | |
3480 | * is done in place -- returned value is in the original string. | |
3481 | */ | |
3482 | static void ga_osrelease_replace_special(gchar *value) | |
3483 | { | |
3484 | gchar *p, *p2, quote; | |
3485 | ||
3486 | /* Trim the string at first space or semicolon if it is not enclosed in | |
3487 | * single or double quotes. */ | |
3488 | if ((value[0] != '"') || (value[0] == '\'')) { | |
3489 | p = strchr(value, ' '); | |
3490 | if (p != NULL) { | |
3491 | *p = 0; | |
3492 | } | |
3493 | p = strchr(value, ';'); | |
3494 | if (p != NULL) { | |
3495 | *p = 0; | |
3496 | } | |
3497 | return; | |
3498 | } | |
3499 | ||
3500 | quote = value[0]; | |
3501 | p2 = value; | |
3502 | p = value + 1; | |
3503 | while (*p != 0) { | |
3504 | if (*p == '\\') { | |
3505 | p++; | |
3506 | switch (*p) { | |
3507 | case '$': | |
3508 | case '\'': | |
3509 | case '"': | |
3510 | case '\\': | |
3511 | case '`': | |
3512 | break; | |
3513 | default: | |
3514 | /* Keep literal backslash followed by whatever is there */ | |
3515 | p--; | |
3516 | break; | |
3517 | } | |
3518 | } else if (*p == quote) { | |
3519 | *p2 = 0; | |
3520 | break; | |
3521 | } | |
3522 | *(p2++) = *(p++); | |
3523 | } | |
3524 | } | |
3525 | ||
3526 | static GKeyFile *ga_parse_osrelease(const char *fname) | |
3527 | { | |
3528 | gchar *content = NULL; | |
3529 | gchar *content2 = NULL; | |
3530 | GError *err = NULL; | |
3531 | GKeyFile *keys = g_key_file_new(); | |
3532 | const char *group = "[os-release]\n"; | |
3533 | ||
3534 | if (!g_file_get_contents(fname, &content, NULL, &err)) { | |
3535 | slog("failed to read '%s', error: %s", fname, err->message); | |
3536 | goto fail; | |
3537 | } | |
3538 | ||
3539 | if (!g_utf8_validate(content, -1, NULL)) { | |
3540 | slog("file is not utf-8 encoded: %s", fname); | |
3541 | goto fail; | |
3542 | } | |
3543 | content2 = g_strdup_printf("%s%s", group, content); | |
3544 | ||
3545 | if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE, | |
3546 | &err)) { | |
3547 | slog("failed to parse file '%s', error: %s", fname, err->message); | |
3548 | goto fail; | |
3549 | } | |
3550 | ||
3551 | g_free(content); | |
3552 | g_free(content2); | |
3553 | return keys; | |
3554 | ||
3555 | fail: | |
3556 | g_error_free(err); | |
3557 | g_free(content); | |
3558 | g_free(content2); | |
3559 | g_key_file_free(keys); | |
3560 | return NULL; | |
3561 | } | |
3562 | ||
3563 | GuestOSInfo *qmp_guest_get_osinfo(Error **errp) | |
3564 | { | |
3565 | GuestOSInfo *info = NULL; | |
3566 | struct utsname kinfo; | |
339ca68b TG |
3567 | GKeyFile *osrelease = NULL; |
3568 | const char *qga_os_release = g_getenv("QGA_OS_RELEASE"); | |
9848f797 TG |
3569 | |
3570 | info = g_new0(GuestOSInfo, 1); | |
3571 | ||
3572 | if (uname(&kinfo) != 0) { | |
3573 | error_setg_errno(errp, errno, "uname failed"); | |
3574 | } else { | |
3575 | info->has_kernel_version = true; | |
3576 | info->kernel_version = g_strdup(kinfo.version); | |
3577 | info->has_kernel_release = true; | |
3578 | info->kernel_release = g_strdup(kinfo.release); | |
3579 | info->has_machine = true; | |
3580 | info->machine = g_strdup(kinfo.machine); | |
3581 | } | |
3582 | ||
339ca68b TG |
3583 | if (qga_os_release != NULL) { |
3584 | osrelease = ga_parse_osrelease(qga_os_release); | |
3585 | } else { | |
3586 | osrelease = ga_parse_osrelease("/etc/os-release"); | |
3587 | if (osrelease == NULL) { | |
3588 | osrelease = ga_parse_osrelease("/usr/lib/os-release"); | |
3589 | } | |
9848f797 TG |
3590 | } |
3591 | ||
3592 | if (osrelease != NULL) { | |
3593 | char *value; | |
3594 | ||
3595 | #define GET_FIELD(field, osfield) do { \ | |
3596 | value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \ | |
3597 | if (value != NULL) { \ | |
3598 | ga_osrelease_replace_special(value); \ | |
3599 | info->has_ ## field = true; \ | |
3600 | info->field = value; \ | |
3601 | } \ | |
3602 | } while (0) | |
3603 | GET_FIELD(id, "ID"); | |
3604 | GET_FIELD(name, "NAME"); | |
3605 | GET_FIELD(pretty_name, "PRETTY_NAME"); | |
3606 | GET_FIELD(version, "VERSION"); | |
3607 | GET_FIELD(version_id, "VERSION_ID"); | |
3608 | GET_FIELD(variant, "VARIANT"); | |
3609 | GET_FIELD(variant_id, "VARIANT_ID"); | |
3610 | #undef GET_FIELD | |
3611 | ||
3612 | g_key_file_free(osrelease); | |
3613 | } | |
3614 | ||
3615 | return info; | |
3616 | } | |
2e4211ce TG |
3617 | |
3618 | GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) | |
3619 | { | |
3620 | error_setg(errp, QERR_UNSUPPORTED); | |
3621 | ||
3622 | return NULL; | |
3623 | } | |
548fb0da MAL |
3624 | |
3625 | #ifndef HOST_NAME_MAX | |
3626 | # ifdef _POSIX_HOST_NAME_MAX | |
3627 | # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX | |
3628 | # else | |
3629 | # define HOST_NAME_MAX 255 | |
3630 | # endif | |
3631 | #endif | |
3632 | ||
3633 | char *qga_get_host_name(Error **errp) | |
3634 | { | |
3635 | long len = -1; | |
3636 | g_autofree char *hostname = NULL; | |
3637 | ||
3638 | #ifdef _SC_HOST_NAME_MAX | |
3639 | len = sysconf(_SC_HOST_NAME_MAX); | |
3640 | #endif /* _SC_HOST_NAME_MAX */ | |
3641 | ||
3642 | if (len < 0) { | |
3643 | len = HOST_NAME_MAX; | |
3644 | } | |
3645 | ||
3646 | /* Unfortunately, gethostname() below does not guarantee a | |
3647 | * NULL terminated string. Therefore, allocate one byte more | |
3648 | * to be sure. */ | |
3649 | hostname = g_new0(char, len + 1); | |
3650 | ||
3651 | if (gethostname(hostname, len) < 0) { | |
3652 | error_setg_errno(errp, errno, | |
3653 | "cannot get hostname"); | |
3654 | return NULL; | |
3655 | } | |
3656 | ||
3657 | return g_steal_pointer(&hostname); | |
3658 | } |