1 | /* |
2 | * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> |
3 | * |
4 | * Network Block Device |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; under version 2 of the License. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
17 | */ |
18 | |
19 | #include "qemu/osdep.h" |
20 | #include <getopt.h> |
21 | #include <libgen.h> |
22 | #include <pthread.h> |
23 | |
24 | #include "qemu-common.h" |
25 | #include "qapi/error.h" |
26 | #include "qemu/cutils.h" |
27 | #include "sysemu/block-backend.h" |
28 | #include "block/block_int.h" |
29 | #include "block/nbd.h" |
30 | #include "qemu/main-loop.h" |
31 | #include "qemu/module.h" |
32 | #include "qemu/option.h" |
33 | #include "qemu/error-report.h" |
34 | #include "qemu/config-file.h" |
35 | #include "qemu/bswap.h" |
36 | #include "qemu/log.h" |
37 | #include "qemu/systemd.h" |
38 | #include "block/snapshot.h" |
39 | #include "qapi/qmp/qdict.h" |
40 | #include "qapi/qmp/qstring.h" |
41 | #include "qom/object_interfaces.h" |
42 | #include "io/channel-socket.h" |
43 | #include "io/net-listener.h" |
44 | #include "crypto/init.h" |
45 | #include "trace/control.h" |
46 | #include "qemu-version.h" |
47 | |
48 | #ifdef __linux__ |
49 | #define HAVE_NBD_DEVICE 1 |
50 | #else |
51 | #define HAVE_NBD_DEVICE 0 |
52 | #endif |
53 | |
54 | #define SOCKET_PATH "/var/lock/qemu-nbd-%s" |
55 | #define QEMU_NBD_OPT_CACHE 256 |
56 | #define QEMU_NBD_OPT_AIO 257 |
57 | #define QEMU_NBD_OPT_DISCARD 258 |
58 | #define QEMU_NBD_OPT_DETECT_ZEROES 259 |
59 | #define QEMU_NBD_OPT_OBJECT 260 |
60 | #define QEMU_NBD_OPT_TLSCREDS 261 |
61 | #define QEMU_NBD_OPT_IMAGE_OPTS 262 |
62 | #define QEMU_NBD_OPT_FORK 263 |
63 | #define QEMU_NBD_OPT_TLSAUTHZ 264 |
64 | #define QEMU_NBD_OPT_PID_FILE 265 |
65 | |
66 | #define MBR_SIZE 512 |
67 | |
68 | static NBDExport *export; |
69 | static int verbose; |
70 | static char *srcpath; |
71 | static SocketAddress *saddr; |
72 | static int persistent = 0; |
73 | static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; |
74 | static int shared = 1; |
75 | static int nb_fds; |
76 | static QIONetListener *server; |
77 | static QCryptoTLSCreds *tlscreds; |
78 | static const char *tlsauthz; |
79 | |
80 | static void usage(const char *name) |
81 | { |
82 | (printf) ( |
83 | "Usage: %s [OPTIONS] FILE\n" |
84 | " or: %s -L [OPTIONS]\n" |
85 | "QEMU Disk Network Block Device Utility\n" |
86 | "\n" |
87 | " -h, --help display this help and exit\n" |
88 | " -V, --version output version information and exit\n" |
89 | "\n" |
90 | "Connection properties:\n" |
91 | " -p, --port=PORT port to listen on (default `%d')\n" |
92 | " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" |
93 | " -k, --socket=PATH path to the unix socket\n" |
94 | " (default '" SOCKET_PATH"')\n" |
95 | " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" |
96 | " -t, --persistent don't exit on the last connection\n" |
97 | " -v, --verbose display extra debugging information\n" |
98 | " -x, --export-name=NAME expose export by name (default is empty string)\n" |
99 | " -D, --description=TEXT export a human-readable description\n" |
100 | "\n" |
101 | "Exposing part of the image:\n" |
102 | " -o, --offset=OFFSET offset into the image\n" |
103 | " -P, --partition=NUM only expose partition NUM\n" |
104 | " -B, --bitmap=NAME expose a persistent dirty bitmap\n" |
105 | "\n" |
106 | "General purpose options:\n" |
107 | " -L, --list list exports available from another NBD server\n" |
108 | " --object type,id=ID,... define an object such as 'secret' for providing\n" |
109 | " passwords and/or encryption keys\n" |
110 | " --tls-creds=ID use id of an earlier --object to provide TLS\n" |
111 | " --tls-authz=ID use id of an earlier --object to provide\n" |
112 | " authorization\n" |
113 | " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
114 | " specify tracing options\n" |
115 | " --fork fork off the server process and exit the parent\n" |
116 | " once the server is running\n" |
117 | " --pid-file=PATH store the server's process ID in the given file\n" |
118 | #if HAVE_NBD_DEVICE |
119 | "\n" |
120 | "Kernel NBD client support:\n" |
121 | " -c, --connect=DEV connect FILE to the local NBD device DEV\n" |
122 | " -d, --disconnect disconnect the specified device\n" |
123 | #endif |
124 | "\n" |
125 | "Block device options:\n" |
126 | " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" |
127 | " -r, --read-only export read-only\n" |
128 | " -s, --snapshot use FILE as an external snapshot, create a temporary\n" |
129 | " file with backing_file=FILE, redirect the write to\n" |
130 | " the temporary one\n" |
131 | " -l, --load-snapshot=SNAPSHOT_PARAM\n" |
132 | " load an internal snapshot inside FILE and export it\n" |
133 | " as an read-only device, SNAPSHOT_PARAM format is\n" |
134 | " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
135 | " '[ID_OR_NAME]'\n" |
136 | " -n, --nocache disable host cache\n" |
137 | " --cache=MODE set cache mode (none, writeback, ...)\n" |
138 | " --aio=MODE set AIO mode (native or threads)\n" |
139 | " --discard=MODE set discard mode (ignore, unmap)\n" |
140 | " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" |
141 | " --image-opts treat FILE as a full set of image options\n" |
142 | "\n" |
143 | QEMU_HELP_BOTTOM "\n" |
144 | , name, name, NBD_DEFAULT_PORT, "DEVICE" ); |
145 | } |
146 | |
147 | static void version(const char *name) |
148 | { |
149 | printf( |
150 | "%s " QEMU_FULL_VERSION "\n" |
151 | "Written by Anthony Liguori.\n" |
152 | "\n" |
153 | QEMU_COPYRIGHT "\n" |
154 | "This is free software; see the source for copying conditions. There is NO\n" |
155 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" |
156 | , name); |
157 | } |
158 | |
159 | struct partition_record |
160 | { |
161 | uint8_t bootable; |
162 | uint8_t start_head; |
163 | uint32_t start_cylinder; |
164 | uint8_t start_sector; |
165 | uint8_t system; |
166 | uint8_t end_head; |
167 | uint8_t end_cylinder; |
168 | uint8_t end_sector; |
169 | uint32_t start_sector_abs; |
170 | uint32_t nb_sectors_abs; |
171 | }; |
172 | |
173 | static void read_partition(uint8_t *p, struct partition_record *r) |
174 | { |
175 | r->bootable = p[0]; |
176 | r->start_head = p[1]; |
177 | r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); |
178 | r->start_sector = p[2] & 0x3f; |
179 | r->system = p[4]; |
180 | r->end_head = p[5]; |
181 | r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); |
182 | r->end_sector = p[6] & 0x3f; |
183 | |
184 | r->start_sector_abs = ldl_le_p(p + 8); |
185 | r->nb_sectors_abs = ldl_le_p(p + 12); |
186 | } |
187 | |
188 | static int find_partition(BlockBackend *blk, int partition, |
189 | uint64_t *offset, uint64_t *size) |
190 | { |
191 | struct partition_record mbr[4]; |
192 | uint8_t data[MBR_SIZE]; |
193 | int i; |
194 | int ext_partnum = 4; |
195 | int ret; |
196 | |
197 | ret = blk_pread(blk, 0, data, sizeof(data)); |
198 | if (ret < 0) { |
199 | error_report("error while reading: %s" , strerror(-ret)); |
200 | exit(EXIT_FAILURE); |
201 | } |
202 | |
203 | if (data[510] != 0x55 || data[511] != 0xaa) { |
204 | return -EINVAL; |
205 | } |
206 | |
207 | for (i = 0; i < 4; i++) { |
208 | read_partition(&data[446 + 16 * i], &mbr[i]); |
209 | |
210 | if (!mbr[i].system || !mbr[i].nb_sectors_abs) { |
211 | continue; |
212 | } |
213 | |
214 | if (mbr[i].system == 0xF || mbr[i].system == 0x5) { |
215 | struct partition_record ext[4]; |
216 | uint8_t data1[MBR_SIZE]; |
217 | int j; |
218 | |
219 | ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, |
220 | data1, sizeof(data1)); |
221 | if (ret < 0) { |
222 | error_report("error while reading: %s" , strerror(-ret)); |
223 | exit(EXIT_FAILURE); |
224 | } |
225 | |
226 | for (j = 0; j < 4; j++) { |
227 | read_partition(&data1[446 + 16 * j], &ext[j]); |
228 | if (!ext[j].system || !ext[j].nb_sectors_abs) { |
229 | continue; |
230 | } |
231 | |
232 | if ((ext_partnum + j + 1) == partition) { |
233 | *offset = (uint64_t)ext[j].start_sector_abs << 9; |
234 | *size = (uint64_t)ext[j].nb_sectors_abs << 9; |
235 | return 0; |
236 | } |
237 | } |
238 | ext_partnum += 4; |
239 | } else if ((i + 1) == partition) { |
240 | *offset = (uint64_t)mbr[i].start_sector_abs << 9; |
241 | *size = (uint64_t)mbr[i].nb_sectors_abs << 9; |
242 | return 0; |
243 | } |
244 | } |
245 | |
246 | return -ENOENT; |
247 | } |
248 | |
249 | static void termsig_handler(int signum) |
250 | { |
251 | atomic_cmpxchg(&state, RUNNING, TERMINATE); |
252 | qemu_notify_event(); |
253 | } |
254 | |
255 | |
256 | static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, |
257 | const char *hostname) |
258 | { |
259 | int ret = EXIT_FAILURE; |
260 | int rc; |
261 | Error *err = NULL; |
262 | QIOChannelSocket *sioc; |
263 | NBDExportInfo *list; |
264 | int i, j; |
265 | |
266 | sioc = qio_channel_socket_new(); |
267 | if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { |
268 | error_report_err(err); |
269 | return EXIT_FAILURE; |
270 | } |
271 | rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, |
272 | &err); |
273 | if (rc < 0) { |
274 | if (err) { |
275 | error_report_err(err); |
276 | } |
277 | goto out; |
278 | } |
279 | printf("exports available: %d\n" , rc); |
280 | for (i = 0; i < rc; i++) { |
281 | printf(" export: '%s'\n" , list[i].name); |
282 | if (list[i].description && *list[i].description) { |
283 | printf(" description: %s\n" , list[i].description); |
284 | } |
285 | if (list[i].flags & NBD_FLAG_HAS_FLAGS) { |
286 | static const char *const flag_names[] = { |
287 | [NBD_FLAG_READ_ONLY_BIT] = "readonly" , |
288 | [NBD_FLAG_SEND_FLUSH_BIT] = "flush" , |
289 | [NBD_FLAG_SEND_FUA_BIT] = "fua" , |
290 | [NBD_FLAG_ROTATIONAL_BIT] = "rotational" , |
291 | [NBD_FLAG_SEND_TRIM_BIT] = "trim" , |
292 | [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes" , |
293 | [NBD_FLAG_SEND_DF_BIT] = "df" , |
294 | [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi" , |
295 | [NBD_FLAG_SEND_RESIZE_BIT] = "resize" , |
296 | [NBD_FLAG_SEND_CACHE_BIT] = "cache" , |
297 | }; |
298 | |
299 | printf(" size: %" PRIu64 "\n" , list[i].size); |
300 | printf(" flags: 0x%x (" , list[i].flags); |
301 | for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { |
302 | if (flag_names[bit] && (list[i].flags & (1 << bit))) { |
303 | printf(" %s" , flag_names[bit]); |
304 | } |
305 | } |
306 | printf(" )\n" ); |
307 | } |
308 | if (list[i].min_block) { |
309 | printf(" min block: %u\n" , list[i].min_block); |
310 | printf(" opt block: %u\n" , list[i].opt_block); |
311 | printf(" max block: %u\n" , list[i].max_block); |
312 | } |
313 | if (list[i].n_contexts) { |
314 | printf(" available meta contexts: %d\n" , list[i].n_contexts); |
315 | for (j = 0; j < list[i].n_contexts; j++) { |
316 | printf(" %s\n" , list[i].contexts[j]); |
317 | } |
318 | } |
319 | } |
320 | nbd_free_export_list(list, rc); |
321 | |
322 | ret = EXIT_SUCCESS; |
323 | out: |
324 | object_unref(OBJECT(sioc)); |
325 | return ret; |
326 | } |
327 | |
328 | |
329 | #if HAVE_NBD_DEVICE |
330 | static void *show_parts(void *arg) |
331 | { |
332 | char *device = arg; |
333 | int nbd; |
334 | |
335 | /* linux just needs an open() to trigger |
336 | * the partition table update |
337 | * but remember to load the module with max_part != 0 : |
338 | * modprobe nbd max_part=63 |
339 | */ |
340 | nbd = open(device, O_RDWR); |
341 | if (nbd >= 0) { |
342 | close(nbd); |
343 | } |
344 | return NULL; |
345 | } |
346 | |
347 | static void *nbd_client_thread(void *arg) |
348 | { |
349 | char *device = arg; |
350 | NBDExportInfo info = { .request_sizes = false, .name = g_strdup("" ) }; |
351 | QIOChannelSocket *sioc; |
352 | int fd; |
353 | int ret; |
354 | pthread_t show_parts_thread; |
355 | Error *local_error = NULL; |
356 | |
357 | sioc = qio_channel_socket_new(); |
358 | if (qio_channel_socket_connect_sync(sioc, |
359 | saddr, |
360 | &local_error) < 0) { |
361 | error_report_err(local_error); |
362 | goto out; |
363 | } |
364 | |
365 | ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), |
366 | NULL, NULL, NULL, &info, &local_error); |
367 | if (ret < 0) { |
368 | if (local_error) { |
369 | error_report_err(local_error); |
370 | } |
371 | goto out_socket; |
372 | } |
373 | |
374 | fd = open(device, O_RDWR); |
375 | if (fd < 0) { |
376 | /* Linux-only, we can use %m in printf. */ |
377 | error_report("Failed to open %s: %m" , device); |
378 | goto out_socket; |
379 | } |
380 | |
381 | ret = nbd_init(fd, sioc, &info, &local_error); |
382 | if (ret < 0) { |
383 | error_report_err(local_error); |
384 | goto out_fd; |
385 | } |
386 | |
387 | /* update partition table */ |
388 | pthread_create(&show_parts_thread, NULL, show_parts, device); |
389 | |
390 | if (verbose) { |
391 | fprintf(stderr, "NBD device %s is now connected to %s\n" , |
392 | device, srcpath); |
393 | } else { |
394 | /* Close stderr so that the qemu-nbd process exits. */ |
395 | dup2(STDOUT_FILENO, STDERR_FILENO); |
396 | } |
397 | |
398 | ret = nbd_client(fd); |
399 | if (ret) { |
400 | goto out_fd; |
401 | } |
402 | close(fd); |
403 | object_unref(OBJECT(sioc)); |
404 | g_free(info.name); |
405 | kill(getpid(), SIGTERM); |
406 | return (void *) EXIT_SUCCESS; |
407 | |
408 | out_fd: |
409 | close(fd); |
410 | out_socket: |
411 | object_unref(OBJECT(sioc)); |
412 | out: |
413 | g_free(info.name); |
414 | kill(getpid(), SIGTERM); |
415 | return (void *) EXIT_FAILURE; |
416 | } |
417 | #endif /* HAVE_NBD_DEVICE */ |
418 | |
419 | static int nbd_can_accept(void) |
420 | { |
421 | return state == RUNNING && nb_fds < shared; |
422 | } |
423 | |
424 | static void nbd_export_closed(NBDExport *export) |
425 | { |
426 | assert(state == TERMINATING); |
427 | state = TERMINATED; |
428 | } |
429 | |
430 | static void nbd_update_server_watch(void); |
431 | |
432 | static void nbd_client_closed(NBDClient *client, bool negotiated) |
433 | { |
434 | nb_fds--; |
435 | if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { |
436 | state = TERMINATE; |
437 | } |
438 | nbd_update_server_watch(); |
439 | nbd_client_put(client); |
440 | } |
441 | |
442 | static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, |
443 | gpointer opaque) |
444 | { |
445 | if (state >= TERMINATE) { |
446 | return; |
447 | } |
448 | |
449 | nb_fds++; |
450 | nbd_update_server_watch(); |
451 | nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); |
452 | } |
453 | |
454 | static void nbd_update_server_watch(void) |
455 | { |
456 | if (nbd_can_accept()) { |
457 | qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); |
458 | } else { |
459 | qio_net_listener_set_client_func(server, NULL, NULL, NULL); |
460 | } |
461 | } |
462 | |
463 | |
464 | static SocketAddress *nbd_build_socket_address(const char *sockpath, |
465 | const char *bindto, |
466 | const char *port) |
467 | { |
468 | SocketAddress *saddr; |
469 | |
470 | saddr = g_new0(SocketAddress, 1); |
471 | if (sockpath) { |
472 | saddr->type = SOCKET_ADDRESS_TYPE_UNIX; |
473 | saddr->u.q_unix.path = g_strdup(sockpath); |
474 | } else { |
475 | InetSocketAddress *inet; |
476 | saddr->type = SOCKET_ADDRESS_TYPE_INET; |
477 | inet = &saddr->u.inet; |
478 | inet->host = g_strdup(bindto); |
479 | if (port) { |
480 | inet->port = g_strdup(port); |
481 | } else { |
482 | inet->port = g_strdup_printf("%d" , NBD_DEFAULT_PORT); |
483 | } |
484 | } |
485 | |
486 | return saddr; |
487 | } |
488 | |
489 | |
490 | static QemuOptsList file_opts = { |
491 | .name = "file" , |
492 | .implied_opt_name = "file" , |
493 | .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), |
494 | .desc = { |
495 | /* no elements => accept any params */ |
496 | { /* end of list */ } |
497 | }, |
498 | }; |
499 | |
500 | static QemuOptsList qemu_object_opts = { |
501 | .name = "object" , |
502 | .implied_opt_name = "qom-type" , |
503 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), |
504 | .desc = { |
505 | { } |
506 | }, |
507 | }; |
508 | |
509 | |
510 | |
511 | static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, |
512 | Error **errp) |
513 | { |
514 | Object *obj; |
515 | QCryptoTLSCreds *creds; |
516 | |
517 | obj = object_resolve_path_component( |
518 | object_get_objects_root(), id); |
519 | if (!obj) { |
520 | error_setg(errp, "No TLS credentials with id '%s'" , |
521 | id); |
522 | return NULL; |
523 | } |
524 | creds = (QCryptoTLSCreds *) |
525 | object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); |
526 | if (!creds) { |
527 | error_setg(errp, "Object with id '%s' is not TLS credentials" , |
528 | id); |
529 | return NULL; |
530 | } |
531 | |
532 | if (list) { |
533 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { |
534 | error_setg(errp, |
535 | "Expecting TLS credentials with a client endpoint" ); |
536 | return NULL; |
537 | } |
538 | } else { |
539 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
540 | error_setg(errp, |
541 | "Expecting TLS credentials with a server endpoint" ); |
542 | return NULL; |
543 | } |
544 | } |
545 | object_ref(obj); |
546 | return creds; |
547 | } |
548 | |
549 | static void setup_address_and_port(const char **address, const char **port) |
550 | { |
551 | if (*address == NULL) { |
552 | *address = "0.0.0.0" ; |
553 | } |
554 | |
555 | if (*port == NULL) { |
556 | *port = stringify(NBD_DEFAULT_PORT); |
557 | } |
558 | } |
559 | |
560 | /* |
561 | * Check socket parameters compatibility when socket activation is used. |
562 | */ |
563 | static const char *socket_activation_validate_opts(const char *device, |
564 | const char *sockpath, |
565 | const char *address, |
566 | const char *port, |
567 | bool list) |
568 | { |
569 | if (device != NULL) { |
570 | return "NBD device can't be set when using socket activation" ; |
571 | } |
572 | |
573 | if (sockpath != NULL) { |
574 | return "Unix socket can't be set when using socket activation" ; |
575 | } |
576 | |
577 | if (address != NULL) { |
578 | return "The interface can't be set when using socket activation" ; |
579 | } |
580 | |
581 | if (port != NULL) { |
582 | return "TCP port number can't be set when using socket activation" ; |
583 | } |
584 | |
585 | if (list) { |
586 | return "List mode is incompatible with socket activation" ; |
587 | } |
588 | |
589 | return NULL; |
590 | } |
591 | |
592 | static void qemu_nbd_shutdown(void) |
593 | { |
594 | job_cancel_sync_all(); |
595 | bdrv_close_all(); |
596 | } |
597 | |
598 | int main(int argc, char **argv) |
599 | { |
600 | BlockBackend *blk; |
601 | BlockDriverState *bs; |
602 | uint64_t dev_offset = 0; |
603 | uint16_t nbdflags = 0; |
604 | bool disconnect = false; |
605 | const char *bindto = NULL; |
606 | const char *port = NULL; |
607 | char *sockpath = NULL; |
608 | char *device = NULL; |
609 | int64_t fd_size; |
610 | QemuOpts *sn_opts = NULL; |
611 | const char *sn_id_or_name = NULL; |
612 | const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:L" ; |
613 | struct option lopt[] = { |
614 | { "help" , no_argument, NULL, 'h' }, |
615 | { "version" , no_argument, NULL, 'V' }, |
616 | { "bind" , required_argument, NULL, 'b' }, |
617 | { "port" , required_argument, NULL, 'p' }, |
618 | { "socket" , required_argument, NULL, 'k' }, |
619 | { "offset" , required_argument, NULL, 'o' }, |
620 | { "read-only" , no_argument, NULL, 'r' }, |
621 | { "partition" , required_argument, NULL, 'P' }, |
622 | { "bitmap" , required_argument, NULL, 'B' }, |
623 | { "connect" , required_argument, NULL, 'c' }, |
624 | { "disconnect" , no_argument, NULL, 'd' }, |
625 | { "list" , no_argument, NULL, 'L' }, |
626 | { "snapshot" , no_argument, NULL, 's' }, |
627 | { "load-snapshot" , required_argument, NULL, 'l' }, |
628 | { "nocache" , no_argument, NULL, 'n' }, |
629 | { "cache" , required_argument, NULL, QEMU_NBD_OPT_CACHE }, |
630 | { "aio" , required_argument, NULL, QEMU_NBD_OPT_AIO }, |
631 | { "discard" , required_argument, NULL, QEMU_NBD_OPT_DISCARD }, |
632 | { "detect-zeroes" , required_argument, NULL, |
633 | QEMU_NBD_OPT_DETECT_ZEROES }, |
634 | { "shared" , required_argument, NULL, 'e' }, |
635 | { "format" , required_argument, NULL, 'f' }, |
636 | { "persistent" , no_argument, NULL, 't' }, |
637 | { "verbose" , no_argument, NULL, 'v' }, |
638 | { "object" , required_argument, NULL, QEMU_NBD_OPT_OBJECT }, |
639 | { "export-name" , required_argument, NULL, 'x' }, |
640 | { "description" , required_argument, NULL, 'D' }, |
641 | { "tls-creds" , required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, |
642 | { "tls-authz" , required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, |
643 | { "image-opts" , no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, |
644 | { "trace" , required_argument, NULL, 'T' }, |
645 | { "fork" , no_argument, NULL, QEMU_NBD_OPT_FORK }, |
646 | { "pid-file" , required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, |
647 | { NULL, 0, NULL, 0 } |
648 | }; |
649 | int ch; |
650 | int opt_ind = 0; |
651 | int flags = BDRV_O_RDWR; |
652 | int partition = 0; |
653 | int ret = 0; |
654 | bool seen_cache = false; |
655 | bool seen_discard = false; |
656 | bool seen_aio = false; |
657 | pthread_t client_thread; |
658 | const char *fmt = NULL; |
659 | Error *local_err = NULL; |
660 | BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
661 | QDict *options = NULL; |
662 | const char *export_name = NULL; /* defaults to "" later for server mode */ |
663 | const char *export_description = NULL; |
664 | const char *bitmap = NULL; |
665 | const char *tlscredsid = NULL; |
666 | bool imageOpts = false; |
667 | bool writethrough = true; |
668 | char *trace_file = NULL; |
669 | bool fork_process = false; |
670 | bool list = false; |
671 | int old_stderr = -1; |
672 | unsigned socket_activation; |
673 | const char *pid_file_name = NULL; |
674 | |
675 | /* The client thread uses SIGTERM to interrupt the server. A signal |
676 | * handler ensures that "qemu-nbd -v -c" exits with a nice status code. |
677 | */ |
678 | struct sigaction sa_sigterm; |
679 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
680 | sa_sigterm.sa_handler = termsig_handler; |
681 | sigaction(SIGTERM, &sa_sigterm, NULL); |
682 | |
683 | #ifdef CONFIG_POSIX |
684 | signal(SIGPIPE, SIG_IGN); |
685 | #endif |
686 | |
687 | error_init(argv[0]); |
688 | module_call_init(MODULE_INIT_TRACE); |
689 | qcrypto_init(&error_fatal); |
690 | |
691 | module_call_init(MODULE_INIT_QOM); |
692 | qemu_add_opts(&qemu_object_opts); |
693 | qemu_add_opts(&qemu_trace_opts); |
694 | qemu_init_exec_dir(argv[0]); |
695 | |
696 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
697 | switch (ch) { |
698 | case 's': |
699 | flags |= BDRV_O_SNAPSHOT; |
700 | break; |
701 | case 'n': |
702 | optarg = (char *) "none" ; |
703 | /* fallthrough */ |
704 | case QEMU_NBD_OPT_CACHE: |
705 | if (seen_cache) { |
706 | error_report("-n and --cache can only be specified once" ); |
707 | exit(EXIT_FAILURE); |
708 | } |
709 | seen_cache = true; |
710 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { |
711 | error_report("Invalid cache mode `%s'" , optarg); |
712 | exit(EXIT_FAILURE); |
713 | } |
714 | break; |
715 | case QEMU_NBD_OPT_AIO: |
716 | if (seen_aio) { |
717 | error_report("--aio can only be specified once" ); |
718 | exit(EXIT_FAILURE); |
719 | } |
720 | seen_aio = true; |
721 | if (!strcmp(optarg, "native" )) { |
722 | flags |= BDRV_O_NATIVE_AIO; |
723 | } else if (!strcmp(optarg, "threads" )) { |
724 | /* this is the default */ |
725 | } else { |
726 | error_report("invalid aio mode `%s'" , optarg); |
727 | exit(EXIT_FAILURE); |
728 | } |
729 | break; |
730 | case QEMU_NBD_OPT_DISCARD: |
731 | if (seen_discard) { |
732 | error_report("--discard can only be specified once" ); |
733 | exit(EXIT_FAILURE); |
734 | } |
735 | seen_discard = true; |
736 | if (bdrv_parse_discard_flags(optarg, &flags) == -1) { |
737 | error_report("Invalid discard mode `%s'" , optarg); |
738 | exit(EXIT_FAILURE); |
739 | } |
740 | break; |
741 | case QEMU_NBD_OPT_DETECT_ZEROES: |
742 | detect_zeroes = |
743 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
744 | optarg, |
745 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
746 | &local_err); |
747 | if (local_err) { |
748 | error_reportf_err(local_err, |
749 | "Failed to parse detect_zeroes mode: " ); |
750 | exit(EXIT_FAILURE); |
751 | } |
752 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && |
753 | !(flags & BDRV_O_UNMAP)) { |
754 | error_report("setting detect-zeroes to unmap is not allowed " |
755 | "without setting discard operation to unmap" ); |
756 | exit(EXIT_FAILURE); |
757 | } |
758 | break; |
759 | case 'b': |
760 | bindto = optarg; |
761 | break; |
762 | case 'p': |
763 | port = optarg; |
764 | break; |
765 | case 'o': |
766 | if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { |
767 | error_report("Invalid offset '%s'" , optarg); |
768 | exit(EXIT_FAILURE); |
769 | } |
770 | break; |
771 | case 'l': |
772 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { |
773 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, |
774 | optarg, false); |
775 | if (!sn_opts) { |
776 | error_report("Failed in parsing snapshot param `%s'" , |
777 | optarg); |
778 | exit(EXIT_FAILURE); |
779 | } |
780 | } else { |
781 | sn_id_or_name = optarg; |
782 | } |
783 | /* fall through */ |
784 | case 'r': |
785 | nbdflags |= NBD_FLAG_READ_ONLY; |
786 | flags &= ~BDRV_O_RDWR; |
787 | break; |
788 | case 'P': |
789 | warn_report("The '-P' option is deprecated; use --image-opts with " |
790 | "a raw device wrapper for subset exports instead" ); |
791 | if (qemu_strtoi(optarg, NULL, 0, &partition) < 0 || |
792 | partition < 1 || partition > 8) { |
793 | error_report("Invalid partition '%s'" , optarg); |
794 | exit(EXIT_FAILURE); |
795 | } |
796 | break; |
797 | case 'B': |
798 | bitmap = optarg; |
799 | break; |
800 | case 'k': |
801 | sockpath = optarg; |
802 | if (sockpath[0] != '/') { |
803 | error_report("socket path must be absolute" ); |
804 | exit(EXIT_FAILURE); |
805 | } |
806 | break; |
807 | case 'd': |
808 | disconnect = true; |
809 | break; |
810 | case 'c': |
811 | device = optarg; |
812 | break; |
813 | case 'e': |
814 | if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || |
815 | shared < 1) { |
816 | error_report("Invalid shared device number '%s'" , optarg); |
817 | exit(EXIT_FAILURE); |
818 | } |
819 | break; |
820 | case 'f': |
821 | fmt = optarg; |
822 | break; |
823 | case 't': |
824 | persistent = 1; |
825 | break; |
826 | case 'x': |
827 | export_name = optarg; |
828 | break; |
829 | case 'D': |
830 | export_description = optarg; |
831 | break; |
832 | case 'v': |
833 | verbose = 1; |
834 | break; |
835 | case 'V': |
836 | version(argv[0]); |
837 | exit(0); |
838 | break; |
839 | case 'h': |
840 | usage(argv[0]); |
841 | exit(0); |
842 | break; |
843 | case '?': |
844 | error_report("Try `%s --help' for more information." , argv[0]); |
845 | exit(EXIT_FAILURE); |
846 | case QEMU_NBD_OPT_OBJECT: { |
847 | QemuOpts *opts; |
848 | opts = qemu_opts_parse_noisily(&qemu_object_opts, |
849 | optarg, true); |
850 | if (!opts) { |
851 | exit(EXIT_FAILURE); |
852 | } |
853 | } break; |
854 | case QEMU_NBD_OPT_TLSCREDS: |
855 | tlscredsid = optarg; |
856 | break; |
857 | case QEMU_NBD_OPT_IMAGE_OPTS: |
858 | imageOpts = true; |
859 | break; |
860 | case 'T': |
861 | g_free(trace_file); |
862 | trace_file = trace_opt_parse(optarg); |
863 | break; |
864 | case QEMU_NBD_OPT_TLSAUTHZ: |
865 | tlsauthz = optarg; |
866 | break; |
867 | case QEMU_NBD_OPT_FORK: |
868 | fork_process = true; |
869 | break; |
870 | case 'L': |
871 | list = true; |
872 | break; |
873 | case QEMU_NBD_OPT_PID_FILE: |
874 | pid_file_name = optarg; |
875 | break; |
876 | } |
877 | } |
878 | |
879 | if (list) { |
880 | if (argc != optind) { |
881 | error_report("List mode is incompatible with a file name" ); |
882 | exit(EXIT_FAILURE); |
883 | } |
884 | if (export_name || export_description || dev_offset || partition || |
885 | device || disconnect || fmt || sn_id_or_name || bitmap || |
886 | seen_aio || seen_discard || seen_cache) { |
887 | error_report("List mode is incompatible with per-device settings" ); |
888 | exit(EXIT_FAILURE); |
889 | } |
890 | if (fork_process) { |
891 | error_report("List mode is incompatible with forking" ); |
892 | exit(EXIT_FAILURE); |
893 | } |
894 | } else if ((argc - optind) != 1) { |
895 | error_report("Invalid number of arguments" ); |
896 | error_printf("Try `%s --help' for more information.\n" , argv[0]); |
897 | exit(EXIT_FAILURE); |
898 | } else if (!export_name) { |
899 | export_name = "" ; |
900 | } |
901 | |
902 | qemu_opts_foreach(&qemu_object_opts, |
903 | user_creatable_add_opts_foreach, |
904 | NULL, &error_fatal); |
905 | |
906 | if (!trace_init_backends()) { |
907 | exit(1); |
908 | } |
909 | trace_init_file(trace_file); |
910 | qemu_set_log(LOG_TRACE); |
911 | |
912 | socket_activation = check_socket_activation(); |
913 | if (socket_activation == 0) { |
914 | setup_address_and_port(&bindto, &port); |
915 | } else { |
916 | /* Using socket activation - check user didn't use -p etc. */ |
917 | const char *err_msg = socket_activation_validate_opts(device, sockpath, |
918 | bindto, port, |
919 | list); |
920 | if (err_msg != NULL) { |
921 | error_report("%s" , err_msg); |
922 | exit(EXIT_FAILURE); |
923 | } |
924 | |
925 | /* qemu-nbd can only listen on a single socket. */ |
926 | if (socket_activation > 1) { |
927 | error_report("qemu-nbd does not support socket activation with %s > 1" , |
928 | "LISTEN_FDS" ); |
929 | exit(EXIT_FAILURE); |
930 | } |
931 | } |
932 | |
933 | if (tlscredsid) { |
934 | if (sockpath) { |
935 | error_report("TLS is only supported with IPv4/IPv6" ); |
936 | exit(EXIT_FAILURE); |
937 | } |
938 | if (device) { |
939 | error_report("TLS is not supported with a host device" ); |
940 | exit(EXIT_FAILURE); |
941 | } |
942 | if (tlsauthz && list) { |
943 | error_report("TLS authorization is incompatible with export list" ); |
944 | exit(EXIT_FAILURE); |
945 | } |
946 | tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); |
947 | if (local_err) { |
948 | error_report("Failed to get TLS creds %s" , |
949 | error_get_pretty(local_err)); |
950 | exit(EXIT_FAILURE); |
951 | } |
952 | } else { |
953 | if (tlsauthz) { |
954 | error_report("--tls-authz is not permitted without --tls-creds" ); |
955 | exit(EXIT_FAILURE); |
956 | } |
957 | } |
958 | |
959 | if (list) { |
960 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
961 | return qemu_nbd_client_list(saddr, tlscreds, bindto); |
962 | } |
963 | |
964 | #if !HAVE_NBD_DEVICE |
965 | if (disconnect || device) { |
966 | error_report("Kernel /dev/nbdN support not available" ); |
967 | exit(EXIT_FAILURE); |
968 | } |
969 | #else /* HAVE_NBD_DEVICE */ |
970 | if (disconnect) { |
971 | int nbdfd = open(argv[optind], O_RDWR); |
972 | if (nbdfd < 0) { |
973 | error_report("Cannot open %s: %s" , argv[optind], |
974 | strerror(errno)); |
975 | exit(EXIT_FAILURE); |
976 | } |
977 | nbd_disconnect(nbdfd); |
978 | |
979 | close(nbdfd); |
980 | |
981 | printf("%s disconnected\n" , argv[optind]); |
982 | |
983 | return 0; |
984 | } |
985 | #endif |
986 | |
987 | if ((device && !verbose) || fork_process) { |
988 | int stderr_fd[2]; |
989 | pid_t pid; |
990 | int ret; |
991 | |
992 | if (qemu_pipe(stderr_fd) < 0) { |
993 | error_report("Error setting up communication pipe: %s" , |
994 | strerror(errno)); |
995 | exit(EXIT_FAILURE); |
996 | } |
997 | |
998 | /* Now daemonize, but keep a communication channel open to |
999 | * print errors and exit with the proper status code. |
1000 | */ |
1001 | pid = fork(); |
1002 | if (pid < 0) { |
1003 | error_report("Failed to fork: %s" , strerror(errno)); |
1004 | exit(EXIT_FAILURE); |
1005 | } else if (pid == 0) { |
1006 | close(stderr_fd[0]); |
1007 | |
1008 | old_stderr = dup(STDERR_FILENO); |
1009 | ret = qemu_daemon(1, 0); |
1010 | |
1011 | /* Temporarily redirect stderr to the parent's pipe... */ |
1012 | dup2(stderr_fd[1], STDERR_FILENO); |
1013 | if (ret < 0) { |
1014 | error_report("Failed to daemonize: %s" , strerror(errno)); |
1015 | exit(EXIT_FAILURE); |
1016 | } |
1017 | |
1018 | /* ... close the descriptor we inherited and go on. */ |
1019 | close(stderr_fd[1]); |
1020 | } else { |
1021 | bool errors = false; |
1022 | char *buf; |
1023 | |
1024 | /* In the parent. Print error messages from the child until |
1025 | * it closes the pipe. |
1026 | */ |
1027 | close(stderr_fd[1]); |
1028 | buf = g_malloc(1024); |
1029 | while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { |
1030 | errors = true; |
1031 | ret = qemu_write_full(STDERR_FILENO, buf, ret); |
1032 | if (ret < 0) { |
1033 | exit(EXIT_FAILURE); |
1034 | } |
1035 | } |
1036 | if (ret < 0) { |
1037 | error_report("Cannot read from daemon: %s" , |
1038 | strerror(errno)); |
1039 | exit(EXIT_FAILURE); |
1040 | } |
1041 | |
1042 | /* Usually the daemon should not print any message. |
1043 | * Exit with zero status in that case. |
1044 | */ |
1045 | exit(errors); |
1046 | } |
1047 | } |
1048 | |
1049 | if (device != NULL && sockpath == NULL) { |
1050 | sockpath = g_malloc(128); |
1051 | snprintf(sockpath, 128, SOCKET_PATH, basename(device)); |
1052 | } |
1053 | |
1054 | server = qio_net_listener_new(); |
1055 | if (socket_activation == 0) { |
1056 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
1057 | if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { |
1058 | object_unref(OBJECT(server)); |
1059 | error_report_err(local_err); |
1060 | exit(EXIT_FAILURE); |
1061 | } |
1062 | } else { |
1063 | size_t i; |
1064 | /* See comment in check_socket_activation above. */ |
1065 | for (i = 0; i < socket_activation; i++) { |
1066 | QIOChannelSocket *sioc; |
1067 | sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, |
1068 | &local_err); |
1069 | if (sioc == NULL) { |
1070 | object_unref(OBJECT(server)); |
1071 | error_report("Failed to use socket activation: %s" , |
1072 | error_get_pretty(local_err)); |
1073 | exit(EXIT_FAILURE); |
1074 | } |
1075 | qio_net_listener_add(server, sioc); |
1076 | object_unref(OBJECT(sioc)); |
1077 | } |
1078 | } |
1079 | |
1080 | if (qemu_init_main_loop(&local_err)) { |
1081 | error_report_err(local_err); |
1082 | exit(EXIT_FAILURE); |
1083 | } |
1084 | bdrv_init(); |
1085 | atexit(qemu_nbd_shutdown); |
1086 | |
1087 | srcpath = argv[optind]; |
1088 | if (imageOpts) { |
1089 | QemuOpts *opts; |
1090 | if (fmt) { |
1091 | error_report("--image-opts and -f are mutually exclusive" ); |
1092 | exit(EXIT_FAILURE); |
1093 | } |
1094 | opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); |
1095 | if (!opts) { |
1096 | qemu_opts_reset(&file_opts); |
1097 | exit(EXIT_FAILURE); |
1098 | } |
1099 | options = qemu_opts_to_qdict(opts, NULL); |
1100 | qemu_opts_reset(&file_opts); |
1101 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); |
1102 | } else { |
1103 | if (fmt) { |
1104 | options = qdict_new(); |
1105 | qdict_put_str(options, "driver" , fmt); |
1106 | } |
1107 | blk = blk_new_open(srcpath, NULL, options, flags, &local_err); |
1108 | } |
1109 | |
1110 | if (!blk) { |
1111 | error_reportf_err(local_err, "Failed to blk_new_open '%s': " , |
1112 | argv[optind]); |
1113 | exit(EXIT_FAILURE); |
1114 | } |
1115 | bs = blk_bs(blk); |
1116 | |
1117 | blk_set_enable_write_cache(blk, !writethrough); |
1118 | |
1119 | if (sn_opts) { |
1120 | ret = bdrv_snapshot_load_tmp(bs, |
1121 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
1122 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
1123 | &local_err); |
1124 | } else if (sn_id_or_name) { |
1125 | ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, |
1126 | &local_err); |
1127 | } |
1128 | if (ret < 0) { |
1129 | error_reportf_err(local_err, "Failed to load snapshot: " ); |
1130 | exit(EXIT_FAILURE); |
1131 | } |
1132 | |
1133 | bs->detect_zeroes = detect_zeroes; |
1134 | fd_size = blk_getlength(blk); |
1135 | if (fd_size < 0) { |
1136 | error_report("Failed to determine the image length: %s" , |
1137 | strerror(-fd_size)); |
1138 | exit(EXIT_FAILURE); |
1139 | } |
1140 | |
1141 | if (dev_offset >= fd_size) { |
1142 | error_report("Offset (%" PRIu64 ") has to be smaller than the image " |
1143 | "size (%" PRId64 ")" , dev_offset, fd_size); |
1144 | exit(EXIT_FAILURE); |
1145 | } |
1146 | fd_size -= dev_offset; |
1147 | |
1148 | if (partition) { |
1149 | uint64_t limit; |
1150 | |
1151 | if (dev_offset) { |
1152 | error_report("Cannot request partition and offset together" ); |
1153 | exit(EXIT_FAILURE); |
1154 | } |
1155 | ret = find_partition(blk, partition, &dev_offset, &limit); |
1156 | if (ret < 0) { |
1157 | error_report("Could not find partition %d: %s" , partition, |
1158 | strerror(-ret)); |
1159 | exit(EXIT_FAILURE); |
1160 | } |
1161 | /* |
1162 | * MBR partition limits are (32-bit << 9); this assert lets |
1163 | * the compiler know that we can't overflow 64 bits. |
1164 | */ |
1165 | assert(dev_offset + limit >= dev_offset); |
1166 | if (dev_offset + limit > fd_size) { |
1167 | error_report("Discovered partition %d at offset %" PRIu64 |
1168 | " size %" PRIu64 ", but size exceeds file length %" |
1169 | PRId64, partition, dev_offset, limit, fd_size); |
1170 | exit(EXIT_FAILURE); |
1171 | } |
1172 | fd_size = limit; |
1173 | } |
1174 | |
1175 | export = nbd_export_new(bs, dev_offset, fd_size, export_name, |
1176 | export_description, bitmap, nbdflags, |
1177 | nbd_export_closed, writethrough, NULL, |
1178 | &error_fatal); |
1179 | |
1180 | if (device) { |
1181 | #if HAVE_NBD_DEVICE |
1182 | int ret; |
1183 | |
1184 | ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); |
1185 | if (ret != 0) { |
1186 | error_report("Failed to create client thread: %s" , strerror(ret)); |
1187 | exit(EXIT_FAILURE); |
1188 | } |
1189 | #endif |
1190 | } else { |
1191 | /* Shut up GCC warnings. */ |
1192 | memset(&client_thread, 0, sizeof(client_thread)); |
1193 | } |
1194 | |
1195 | nbd_update_server_watch(); |
1196 | |
1197 | if (pid_file_name) { |
1198 | qemu_write_pidfile(pid_file_name, &error_fatal); |
1199 | } |
1200 | |
1201 | /* now when the initialization is (almost) complete, chdir("/") |
1202 | * to free any busy filesystems */ |
1203 | if (chdir("/" ) < 0) { |
1204 | error_report("Could not chdir to root directory: %s" , |
1205 | strerror(errno)); |
1206 | exit(EXIT_FAILURE); |
1207 | } |
1208 | |
1209 | if (fork_process) { |
1210 | dup2(old_stderr, STDERR_FILENO); |
1211 | close(old_stderr); |
1212 | } |
1213 | |
1214 | state = RUNNING; |
1215 | do { |
1216 | main_loop_wait(false); |
1217 | if (state == TERMINATE) { |
1218 | state = TERMINATING; |
1219 | nbd_export_close(export); |
1220 | nbd_export_put(export); |
1221 | export = NULL; |
1222 | } |
1223 | } while (state != TERMINATED); |
1224 | |
1225 | blk_unref(blk); |
1226 | if (sockpath) { |
1227 | unlink(sockpath); |
1228 | } |
1229 | |
1230 | qemu_opts_del(sn_opts); |
1231 | |
1232 | if (device) { |
1233 | void *ret; |
1234 | pthread_join(client_thread, &ret); |
1235 | exit(ret != NULL); |
1236 | } else { |
1237 | exit(EXIT_SUCCESS); |
1238 | } |
1239 | } |
1240 | |