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Commit | Line | Data |
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cd831bd7 | 1 | /* |
7a5ca864 FB |
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 | |
8167ee88 | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
7a5ca864 FB |
17 | */ |
18 | ||
d38ea87a | 19 | #include "qemu/osdep.h" |
c2a3d7da EB |
20 | #include <getopt.h> |
21 | #include <libgen.h> | |
22 | #include <pthread.h> | |
23 | ||
14a48c1d | 24 | #include "qemu-common.h" |
da34e65c | 25 | #include "qapi/error.h" |
f348b6d1 | 26 | #include "qemu/cutils.h" |
26f54e9a | 27 | #include "sysemu/block-backend.h" |
b3838a40 | 28 | #include "block/block_int.h" |
737e150e | 29 | #include "block/nbd.h" |
6a1751b7 | 30 | #include "qemu/main-loop.h" |
922a01a0 | 31 | #include "qemu/option.h" |
537b41f5 | 32 | #include "qemu/error-report.h" |
0ab3b337 | 33 | #include "qemu/config-file.h" |
58369e22 | 34 | #include "qemu/bswap.h" |
39ca463e | 35 | #include "qemu/log.h" |
53fabd4b | 36 | #include "qemu/systemd.h" |
8c116b0e | 37 | #include "block/snapshot.h" |
452fcdbc | 38 | #include "qapi/qmp/qdict.h" |
d49b6836 | 39 | #include "qapi/qmp/qstring.h" |
0ab3b337 | 40 | #include "qom/object_interfaces.h" |
d0d6ff58 | 41 | #include "io/channel-socket.h" |
e4849c1d | 42 | #include "io/net-listener.h" |
c2297088 | 43 | #include "crypto/init.h" |
39ca463e | 44 | #include "trace/control.h" |
be377133 | 45 | #include "qemu-version.h" |
7a5ca864 | 46 | |
3c1fa35d EB |
47 | #ifdef __linux__ |
48 | #define HAVE_NBD_DEVICE 1 | |
49 | #else | |
50 | #define HAVE_NBD_DEVICE 0 | |
51 | #endif | |
52 | ||
713cc671 | 53 | #define SOCKET_PATH "/var/lock/qemu-nbd-%s" |
fa8b7ce2 DB |
54 | #define QEMU_NBD_OPT_CACHE 256 |
55 | #define QEMU_NBD_OPT_AIO 257 | |
56 | #define QEMU_NBD_OPT_DISCARD 258 | |
57 | #define QEMU_NBD_OPT_DETECT_ZEROES 259 | |
58 | #define QEMU_NBD_OPT_OBJECT 260 | |
59 | #define QEMU_NBD_OPT_TLSCREDS 261 | |
60 | #define QEMU_NBD_OPT_IMAGE_OPTS 262 | |
ffb31e1d | 61 | #define QEMU_NBD_OPT_FORK 263 |
b25e12da | 62 | #define QEMU_NBD_OPT_TLSAUTHZ 264 |
7a5ca864 | 63 | |
bd31c214 EB |
64 | #define MBR_SIZE 512 |
65 | ||
9d976580 | 66 | static NBDExport *export; |
b1d8e52e | 67 | static int verbose; |
a517e88b | 68 | static char *srcpath; |
bd269ebc | 69 | static SocketAddress *saddr; |
7860a380 PB |
70 | static int persistent = 0; |
71 | static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; | |
a61c6782 PB |
72 | static int shared = 1; |
73 | static int nb_fds; | |
e4849c1d | 74 | static QIONetListener *server; |
145614a1 | 75 | static QCryptoTLSCreds *tlscreds; |
b25e12da | 76 | static const char *tlsauthz; |
7a5ca864 FB |
77 | |
78 | static void usage(const char *name) | |
79 | { | |
b033cd86 | 80 | (printf) ( |
7a5ca864 | 81 | "Usage: %s [OPTIONS] FILE\n" |
68b96f15 EB |
82 | " or: %s -L [OPTIONS]\n" |
83 | "QEMU Disk Network Block Device Utility\n" | |
7a5ca864 | 84 | "\n" |
713cc671 PL |
85 | " -h, --help display this help and exit\n" |
86 | " -V, --version output version information and exit\n" | |
b033cd86 PB |
87 | "\n" |
88 | "Connection properties:\n" | |
713cc671 PL |
89 | " -p, --port=PORT port to listen on (default `%d')\n" |
90 | " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" | |
91 | " -k, --socket=PATH path to the unix socket\n" | |
92 | " (default '"SOCKET_PATH"')\n" | |
93 | " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" | |
94 | " -t, --persistent don't exit on the last connection\n" | |
95 | " -v, --verbose display extra debugging information\n" | |
f5cd0bb5 VSO |
96 | " -x, --export-name=NAME expose export by name (default is empty string)\n" |
97 | " -D, --description=TEXT export a human-readable description\n" | |
7a5ca864 | 98 | "\n" |
b033cd86 | 99 | "Exposing part of the image:\n" |
713cc671 PL |
100 | " -o, --offset=OFFSET offset into the image\n" |
101 | " -P, --partition=NUM only expose partition NUM\n" | |
636192c4 | 102 | " -B, --bitmap=NAME expose a persistent dirty bitmap\n" |
b033cd86 | 103 | "\n" |
0ab3b337 | 104 | "General purpose options:\n" |
68b96f15 | 105 | " -L, --list list exports available from another NBD server\n" |
0ab3b337 DB |
106 | " --object type,id=ID,... define an object such as 'secret' for providing\n" |
107 | " passwords and/or encryption keys\n" | |
f7812df7 | 108 | " --tls-creds=ID use id of an earlier --object to provide TLS\n" |
b25e12da DB |
109 | " --tls-authz=ID use id of an earlier --object to provide\n" |
110 | " authorization\n" | |
39ca463e DL |
111 | " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
112 | " specify tracing options\n" | |
ffb31e1d HR |
113 | " --fork fork off the server process and exit the parent\n" |
114 | " once the server is running\n" | |
3c1fa35d EB |
115 | #if HAVE_NBD_DEVICE |
116 | "\n" | |
b033cd86 | 117 | "Kernel NBD client support:\n" |
713cc671 PL |
118 | " -c, --connect=DEV connect FILE to the local NBD device DEV\n" |
119 | " -d, --disconnect disconnect the specified device\n" | |
b033cd86 PB |
120 | #endif |
121 | "\n" | |
122 | "Block device options:\n" | |
713cc671 PL |
123 | " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" |
124 | " -r, --read-only export read-only\n" | |
125 | " -s, --snapshot use FILE as an external snapshot, create a temporary\n" | |
126 | " file with backing_file=FILE, redirect the write to\n" | |
127 | " the temporary one\n" | |
8c116b0e | 128 | " -l, --load-snapshot=SNAPSHOT_PARAM\n" |
713cc671 PL |
129 | " load an internal snapshot inside FILE and export it\n" |
130 | " as an read-only device, SNAPSHOT_PARAM format is\n" | |
131 | " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
132 | " '[ID_OR_NAME]'\n" | |
133 | " -n, --nocache disable host cache\n" | |
134 | " --cache=MODE set cache mode (none, writeback, ...)\n" | |
713cc671 | 135 | " --aio=MODE set AIO mode (native or threads)\n" |
b3838a40 | 136 | " --discard=MODE set discard mode (ignore, unmap)\n" |
6883de6c | 137 | " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" |
77c9aaef | 138 | " --image-opts treat FILE as a full set of image options\n" |
b033cd86 | 139 | "\n" |
f5048cb7 | 140 | QEMU_HELP_BOTTOM "\n" |
68b96f15 | 141 | , name, name, NBD_DEFAULT_PORT, "DEVICE"); |
7a5ca864 FB |
142 | } |
143 | ||
144 | static void version(const char *name) | |
145 | { | |
146 | printf( | |
7e563bfb | 147 | "%s " QEMU_FULL_VERSION "\n" |
7a5ca864 FB |
148 | "Written by Anthony Liguori.\n" |
149 | "\n" | |
be377133 | 150 | QEMU_COPYRIGHT "\n" |
7a5ca864 FB |
151 | "This is free software; see the source for copying conditions. There is NO\n" |
152 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" | |
315bc7aa | 153 | , name); |
7a5ca864 FB |
154 | } |
155 | ||
156 | struct partition_record | |
157 | { | |
158 | uint8_t bootable; | |
159 | uint8_t start_head; | |
160 | uint32_t start_cylinder; | |
161 | uint8_t start_sector; | |
162 | uint8_t system; | |
163 | uint8_t end_head; | |
164 | uint8_t end_cylinder; | |
165 | uint8_t end_sector; | |
166 | uint32_t start_sector_abs; | |
167 | uint32_t nb_sectors_abs; | |
168 | }; | |
169 | ||
170 | static void read_partition(uint8_t *p, struct partition_record *r) | |
171 | { | |
172 | r->bootable = p[0]; | |
173 | r->start_head = p[1]; | |
174 | r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); | |
175 | r->start_sector = p[2] & 0x3f; | |
176 | r->system = p[4]; | |
177 | r->end_head = p[5]; | |
178 | r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); | |
179 | r->end_sector = p[6] & 0x3f; | |
ac97393d | 180 | |
773dce3c PM |
181 | r->start_sector_abs = ldl_le_p(p + 8); |
182 | r->nb_sectors_abs = ldl_le_p(p + 12); | |
7a5ca864 FB |
183 | } |
184 | ||
4c58e80a | 185 | static int find_partition(BlockBackend *blk, int partition, |
9d26dfcb | 186 | uint64_t *offset, uint64_t *size) |
7a5ca864 FB |
187 | { |
188 | struct partition_record mbr[4]; | |
bd31c214 | 189 | uint8_t data[MBR_SIZE]; |
7a5ca864 FB |
190 | int i; |
191 | int ext_partnum = 4; | |
cb7cf0e3 | 192 | int ret; |
7a5ca864 | 193 | |
bd31c214 EB |
194 | ret = blk_pread(blk, 0, data, sizeof(data)); |
195 | if (ret < 0) { | |
a4699e55 | 196 | error_report("error while reading: %s", strerror(-ret)); |
85b01e09 | 197 | exit(EXIT_FAILURE); |
cb7cf0e3 | 198 | } |
7a5ca864 FB |
199 | |
200 | if (data[510] != 0x55 || data[511] != 0xaa) { | |
185b4338 | 201 | return -EINVAL; |
7a5ca864 FB |
202 | } |
203 | ||
204 | for (i = 0; i < 4; i++) { | |
205 | read_partition(&data[446 + 16 * i], &mbr[i]); | |
206 | ||
453b07b1 | 207 | if (!mbr[i].system || !mbr[i].nb_sectors_abs) { |
7a5ca864 | 208 | continue; |
453b07b1 | 209 | } |
7a5ca864 FB |
210 | |
211 | if (mbr[i].system == 0xF || mbr[i].system == 0x5) { | |
212 | struct partition_record ext[4]; | |
bd31c214 | 213 | uint8_t data1[MBR_SIZE]; |
7a5ca864 FB |
214 | int j; |
215 | ||
bd31c214 EB |
216 | ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, |
217 | data1, sizeof(data1)); | |
218 | if (ret < 0) { | |
a4699e55 | 219 | error_report("error while reading: %s", strerror(-ret)); |
85b01e09 | 220 | exit(EXIT_FAILURE); |
cb7cf0e3 | 221 | } |
7a5ca864 FB |
222 | |
223 | for (j = 0; j < 4; j++) { | |
224 | read_partition(&data1[446 + 16 * j], &ext[j]); | |
453b07b1 | 225 | if (!ext[j].system || !ext[j].nb_sectors_abs) { |
7a5ca864 | 226 | continue; |
453b07b1 | 227 | } |
7a5ca864 FB |
228 | |
229 | if ((ext_partnum + j + 1) == partition) { | |
230 | *offset = (uint64_t)ext[j].start_sector_abs << 9; | |
231 | *size = (uint64_t)ext[j].nb_sectors_abs << 9; | |
232 | return 0; | |
233 | } | |
234 | } | |
235 | ext_partnum += 4; | |
236 | } else if ((i + 1) == partition) { | |
237 | *offset = (uint64_t)mbr[i].start_sector_abs << 9; | |
238 | *size = (uint64_t)mbr[i].nb_sectors_abs << 9; | |
239 | return 0; | |
240 | } | |
241 | } | |
242 | ||
185b4338 | 243 | return -ENOENT; |
7a5ca864 FB |
244 | } |
245 | ||
bb345110 PB |
246 | static void termsig_handler(int signum) |
247 | { | |
23994a5f | 248 | atomic_cmpxchg(&state, RUNNING, TERMINATE); |
a61c6782 | 249 | qemu_notify_event(); |
bb345110 PB |
250 | } |
251 | ||
537b41f5 | 252 | |
68b96f15 EB |
253 | static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, |
254 | const char *hostname) | |
255 | { | |
256 | int ret = EXIT_FAILURE; | |
257 | int rc; | |
258 | Error *err = NULL; | |
259 | QIOChannelSocket *sioc; | |
260 | NBDExportInfo *list; | |
261 | int i, j; | |
262 | ||
263 | sioc = qio_channel_socket_new(); | |
264 | if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { | |
265 | error_report_err(err); | |
266 | return EXIT_FAILURE; | |
267 | } | |
268 | rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, | |
269 | &err); | |
270 | if (rc < 0) { | |
271 | if (err) { | |
272 | error_report_err(err); | |
273 | } | |
274 | goto out; | |
275 | } | |
276 | printf("exports available: %d\n", rc); | |
277 | for (i = 0; i < rc; i++) { | |
278 | printf(" export: '%s'\n", list[i].name); | |
279 | if (list[i].description && *list[i].description) { | |
280 | printf(" description: %s\n", list[i].description); | |
281 | } | |
282 | if (list[i].flags & NBD_FLAG_HAS_FLAGS) { | |
c4e2aff8 HR |
283 | static const char *const flag_names[] = { |
284 | [NBD_FLAG_READ_ONLY_BIT] = "readonly", | |
285 | [NBD_FLAG_SEND_FLUSH_BIT] = "flush", | |
286 | [NBD_FLAG_SEND_FUA_BIT] = "fua", | |
287 | [NBD_FLAG_ROTATIONAL_BIT] = "rotational", | |
288 | [NBD_FLAG_SEND_TRIM_BIT] = "trim", | |
289 | [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", | |
290 | [NBD_FLAG_SEND_DF_BIT] = "df", | |
291 | [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", | |
292 | [NBD_FLAG_SEND_RESIZE_BIT] = "resize", | |
293 | [NBD_FLAG_SEND_CACHE_BIT] = "cache", | |
294 | }; | |
295 | ||
68b96f15 EB |
296 | printf(" size: %" PRIu64 "\n", list[i].size); |
297 | printf(" flags: 0x%x (", list[i].flags); | |
c4e2aff8 HR |
298 | for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { |
299 | if (flag_names[bit] && (list[i].flags & (1 << bit))) { | |
300 | printf(" %s", flag_names[bit]); | |
301 | } | |
68b96f15 EB |
302 | } |
303 | printf(" )\n"); | |
304 | } | |
305 | if (list[i].min_block) { | |
306 | printf(" min block: %u\n", list[i].min_block); | |
307 | printf(" opt block: %u\n", list[i].opt_block); | |
308 | printf(" max block: %u\n", list[i].max_block); | |
309 | } | |
310 | if (list[i].n_contexts) { | |
311 | printf(" available meta contexts: %d\n", list[i].n_contexts); | |
312 | for (j = 0; j < list[i].n_contexts; j++) { | |
313 | printf(" %s\n", list[i].contexts[j]); | |
314 | } | |
315 | } | |
316 | } | |
317 | nbd_free_export_list(list, rc); | |
318 | ||
319 | ret = EXIT_SUCCESS; | |
320 | out: | |
321 | object_unref(OBJECT(sioc)); | |
322 | return ret; | |
323 | } | |
324 | ||
325 | ||
3c1fa35d | 326 | #if HAVE_NBD_DEVICE |
a517e88b | 327 | static void *show_parts(void *arg) |
cd831bd7 | 328 | { |
a6ac2313 | 329 | char *device = arg; |
a517e88b PB |
330 | int nbd; |
331 | ||
332 | /* linux just needs an open() to trigger | |
333 | * the partition table update | |
334 | * but remember to load the module with max_part != 0 : | |
335 | * modprobe nbd max_part=63 | |
336 | */ | |
337 | nbd = open(device, O_RDWR); | |
fc19f8a0 | 338 | if (nbd >= 0) { |
a517e88b PB |
339 | close(nbd); |
340 | } | |
341 | return NULL; | |
342 | } | |
cd831bd7 | 343 | |
a517e88b PB |
344 | static void *nbd_client_thread(void *arg) |
345 | { | |
a6ac2313 | 346 | char *device = arg; |
6dc1667d | 347 | NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; |
d0d6ff58 DB |
348 | QIOChannelSocket *sioc; |
349 | int fd; | |
a517e88b PB |
350 | int ret; |
351 | pthread_t show_parts_thread; | |
1ce52846 | 352 | Error *local_error = NULL; |
a517e88b | 353 | |
d0d6ff58 DB |
354 | sioc = qio_channel_socket_new(); |
355 | if (qio_channel_socket_connect_sync(sioc, | |
356 | saddr, | |
357 | &local_error) < 0) { | |
48bec07e | 358 | error_report_err(local_error); |
dc10e8b3 SH |
359 | goto out; |
360 | } | |
a517e88b | 361 | |
6dc1667d | 362 | ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), |
004a89fc | 363 | NULL, NULL, NULL, &info, &local_error); |
fc19f8a0 | 364 | if (ret < 0) { |
1ce52846 | 365 | if (local_error) { |
78288671 | 366 | error_report_err(local_error); |
1ce52846 | 367 | } |
0c544d73 | 368 | goto out_socket; |
a517e88b PB |
369 | } |
370 | ||
a6ac2313 | 371 | fd = open(device, O_RDWR); |
fc19f8a0 | 372 | if (fd < 0) { |
a6ac2313 | 373 | /* Linux-only, we can use %m in printf. */ |
b9884681 | 374 | error_report("Failed to open %s: %m", device); |
0c544d73 | 375 | goto out_socket; |
a6ac2313 PB |
376 | } |
377 | ||
004a89fc | 378 | ret = nbd_init(fd, sioc, &info, &local_error); |
fc19f8a0 | 379 | if (ret < 0) { |
be41c100 | 380 | error_report_err(local_error); |
0c544d73 | 381 | goto out_fd; |
a517e88b PB |
382 | } |
383 | ||
384 | /* update partition table */ | |
a6ac2313 | 385 | pthread_create(&show_parts_thread, NULL, show_parts, device); |
a517e88b | 386 | |
c1f8fdc3 PB |
387 | if (verbose) { |
388 | fprintf(stderr, "NBD device %s is now connected to %s\n", | |
389 | device, srcpath); | |
390 | } else { | |
391 | /* Close stderr so that the qemu-nbd process exits. */ | |
392 | dup2(STDOUT_FILENO, STDERR_FILENO); | |
393 | } | |
a517e88b PB |
394 | |
395 | ret = nbd_client(fd); | |
396 | if (ret) { | |
0c544d73 | 397 | goto out_fd; |
cd831bd7 | 398 | } |
a517e88b | 399 | close(fd); |
d0d6ff58 | 400 | object_unref(OBJECT(sioc)); |
6dc1667d | 401 | g_free(info.name); |
a517e88b PB |
402 | kill(getpid(), SIGTERM); |
403 | return (void *) EXIT_SUCCESS; | |
404 | ||
0c544d73 PB |
405 | out_fd: |
406 | close(fd); | |
407 | out_socket: | |
d0d6ff58 | 408 | object_unref(OBJECT(sioc)); |
a517e88b | 409 | out: |
6dc1667d | 410 | g_free(info.name); |
a517e88b PB |
411 | kill(getpid(), SIGTERM); |
412 | return (void *) EXIT_FAILURE; | |
cd831bd7 | 413 | } |
3c1fa35d | 414 | #endif /* HAVE_NBD_DEVICE */ |
cd831bd7 | 415 | |
e4afbf4f | 416 | static int nbd_can_accept(void) |
a61c6782 | 417 | { |
df8ad9f1 | 418 | return state == RUNNING && nb_fds < shared; |
a61c6782 PB |
419 | } |
420 | ||
9d976580 | 421 | static void nbd_export_closed(NBDExport *export) |
7860a380 PB |
422 | { |
423 | assert(state == TERMINATING); | |
424 | state = TERMINATED; | |
425 | } | |
426 | ||
d0d6ff58 | 427 | static void nbd_update_server_watch(void); |
e4afbf4f | 428 | |
0c9390d9 | 429 | static void nbd_client_closed(NBDClient *client, bool negotiated) |
a61c6782 | 430 | { |
1743b515 | 431 | nb_fds--; |
0c9390d9 | 432 | if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { |
7860a380 PB |
433 | state = TERMINATE; |
434 | } | |
d0d6ff58 | 435 | nbd_update_server_watch(); |
7860a380 | 436 | nbd_client_put(client); |
a61c6782 PB |
437 | } |
438 | ||
e4849c1d DB |
439 | static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, |
440 | gpointer opaque) | |
a61c6782 | 441 | { |
7860a380 | 442 | if (state >= TERMINATE) { |
e4849c1d | 443 | return; |
7860a380 PB |
444 | } |
445 | ||
ee7d7aab | 446 | nb_fds++; |
d0d6ff58 | 447 | nbd_update_server_watch(); |
b25e12da | 448 | nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); |
a61c6782 PB |
449 | } |
450 | ||
d0d6ff58 | 451 | static void nbd_update_server_watch(void) |
e4afbf4f FZ |
452 | { |
453 | if (nbd_can_accept()) { | |
e4849c1d | 454 | qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); |
e4afbf4f | 455 | } else { |
e4849c1d | 456 | qio_net_listener_set_client_func(server, NULL, NULL, NULL); |
e4afbf4f FZ |
457 | } |
458 | } | |
459 | ||
48bec07e | 460 | |
bd269ebc | 461 | static SocketAddress *nbd_build_socket_address(const char *sockpath, |
48bec07e DB |
462 | const char *bindto, |
463 | const char *port) | |
464 | { | |
bd269ebc | 465 | SocketAddress *saddr; |
48bec07e | 466 | |
bd269ebc | 467 | saddr = g_new0(SocketAddress, 1); |
48bec07e | 468 | if (sockpath) { |
bd269ebc MA |
469 | saddr->type = SOCKET_ADDRESS_TYPE_UNIX; |
470 | saddr->u.q_unix.path = g_strdup(sockpath); | |
48bec07e | 471 | } else { |
0399293e | 472 | InetSocketAddress *inet; |
bd269ebc MA |
473 | saddr->type = SOCKET_ADDRESS_TYPE_INET; |
474 | inet = &saddr->u.inet; | |
0399293e | 475 | inet->host = g_strdup(bindto); |
48bec07e | 476 | if (port) { |
0399293e | 477 | inet->port = g_strdup(port); |
48bec07e | 478 | } else { |
0399293e | 479 | inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); |
48bec07e DB |
480 | } |
481 | } | |
482 | ||
483 | return saddr; | |
484 | } | |
485 | ||
486 | ||
77c9aaef DB |
487 | static QemuOptsList file_opts = { |
488 | .name = "file", | |
489 | .implied_opt_name = "file", | |
490 | .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), | |
491 | .desc = { | |
492 | /* no elements => accept any params */ | |
493 | { /* end of list */ } | |
494 | }, | |
495 | }; | |
496 | ||
0ab3b337 DB |
497 | static QemuOptsList qemu_object_opts = { |
498 | .name = "object", | |
499 | .implied_opt_name = "qom-type", | |
500 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
501 | .desc = { | |
502 | { } | |
503 | }, | |
504 | }; | |
505 | ||
506 | ||
145614a1 | 507 | |
68b96f15 EB |
508 | static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, |
509 | Error **errp) | |
145614a1 DB |
510 | { |
511 | Object *obj; | |
512 | QCryptoTLSCreds *creds; | |
513 | ||
514 | obj = object_resolve_path_component( | |
515 | object_get_objects_root(), id); | |
516 | if (!obj) { | |
517 | error_setg(errp, "No TLS credentials with id '%s'", | |
518 | id); | |
519 | return NULL; | |
520 | } | |
521 | creds = (QCryptoTLSCreds *) | |
522 | object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); | |
523 | if (!creds) { | |
524 | error_setg(errp, "Object with id '%s' is not TLS credentials", | |
525 | id); | |
526 | return NULL; | |
527 | } | |
528 | ||
68b96f15 EB |
529 | if (list) { |
530 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { | |
531 | error_setg(errp, | |
532 | "Expecting TLS credentials with a client endpoint"); | |
533 | return NULL; | |
534 | } | |
535 | } else { | |
536 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { | |
537 | error_setg(errp, | |
538 | "Expecting TLS credentials with a server endpoint"); | |
539 | return NULL; | |
540 | } | |
145614a1 DB |
541 | } |
542 | object_ref(obj); | |
543 | return creds; | |
544 | } | |
545 | ||
a721f53b RJ |
546 | static void setup_address_and_port(const char **address, const char **port) |
547 | { | |
548 | if (*address == NULL) { | |
549 | *address = "0.0.0.0"; | |
550 | } | |
551 | ||
552 | if (*port == NULL) { | |
553 | *port = stringify(NBD_DEFAULT_PORT); | |
554 | } | |
555 | } | |
556 | ||
a721f53b RJ |
557 | /* |
558 | * Check socket parameters compatibility when socket activation is used. | |
559 | */ | |
560 | static const char *socket_activation_validate_opts(const char *device, | |
561 | const char *sockpath, | |
562 | const char *address, | |
68b96f15 EB |
563 | const char *port, |
564 | bool list) | |
a721f53b RJ |
565 | { |
566 | if (device != NULL) { | |
567 | return "NBD device can't be set when using socket activation"; | |
568 | } | |
569 | ||
570 | if (sockpath != NULL) { | |
571 | return "Unix socket can't be set when using socket activation"; | |
572 | } | |
573 | ||
574 | if (address != NULL) { | |
575 | return "The interface can't be set when using socket activation"; | |
576 | } | |
577 | ||
578 | if (port != NULL) { | |
579 | return "TCP port number can't be set when using socket activation"; | |
580 | } | |
581 | ||
68b96f15 EB |
582 | if (list) { |
583 | return "List mode is incompatible with socket activation"; | |
584 | } | |
585 | ||
a721f53b RJ |
586 | return NULL; |
587 | } | |
145614a1 | 588 | |
b3b5299d KW |
589 | static void qemu_nbd_shutdown(void) |
590 | { | |
591 | job_cancel_sync_all(); | |
592 | bdrv_close_all(); | |
593 | } | |
594 | ||
7a5ca864 FB |
595 | int main(int argc, char **argv) |
596 | { | |
26f54e9a | 597 | BlockBackend *blk; |
7a5ca864 | 598 | BlockDriverState *bs; |
9d26dfcb | 599 | uint64_t dev_offset = 0; |
7423f417 | 600 | uint16_t nbdflags = 0; |
cd831bd7 | 601 | bool disconnect = false; |
a721f53b | 602 | const char *bindto = NULL; |
48bec07e DB |
603 | const char *port = NULL; |
604 | char *sockpath = NULL; | |
a6ac2313 | 605 | char *device = NULL; |
9d26dfcb | 606 | int64_t fd_size; |
8c116b0e WX |
607 | QemuOpts *sn_opts = NULL; |
608 | const char *sn_id_or_name = NULL; | |
68b96f15 | 609 | const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:L"; |
7a5ca864 | 610 | struct option lopt[] = { |
aa6e546c DB |
611 | { "help", no_argument, NULL, 'h' }, |
612 | { "version", no_argument, NULL, 'V' }, | |
613 | { "bind", required_argument, NULL, 'b' }, | |
614 | { "port", required_argument, NULL, 'p' }, | |
615 | { "socket", required_argument, NULL, 'k' }, | |
616 | { "offset", required_argument, NULL, 'o' }, | |
617 | { "read-only", no_argument, NULL, 'r' }, | |
618 | { "partition", required_argument, NULL, 'P' }, | |
636192c4 | 619 | { "bitmap", required_argument, NULL, 'B' }, |
aa6e546c DB |
620 | { "connect", required_argument, NULL, 'c' }, |
621 | { "disconnect", no_argument, NULL, 'd' }, | |
68b96f15 | 622 | { "list", no_argument, NULL, 'L' }, |
aa6e546c DB |
623 | { "snapshot", no_argument, NULL, 's' }, |
624 | { "load-snapshot", required_argument, NULL, 'l' }, | |
625 | { "nocache", no_argument, NULL, 'n' }, | |
626 | { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, | |
627 | { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, | |
628 | { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, | |
629 | { "detect-zeroes", required_argument, NULL, | |
630 | QEMU_NBD_OPT_DETECT_ZEROES }, | |
631 | { "shared", required_argument, NULL, 'e' }, | |
632 | { "format", required_argument, NULL, 'f' }, | |
633 | { "persistent", no_argument, NULL, 't' }, | |
634 | { "verbose", no_argument, NULL, 'v' }, | |
635 | { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, | |
636 | { "export-name", required_argument, NULL, 'x' }, | |
b1a75b33 | 637 | { "description", required_argument, NULL, 'D' }, |
aa6e546c | 638 | { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, |
b25e12da | 639 | { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, |
aa6e546c | 640 | { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, |
39ca463e | 641 | { "trace", required_argument, NULL, 'T' }, |
ffb31e1d | 642 | { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, |
660f11be | 643 | { NULL, 0, NULL, 0 } |
7a5ca864 FB |
644 | }; |
645 | int ch; | |
646 | int opt_ind = 0; | |
f5edb014 | 647 | int flags = BDRV_O_RDWR; |
43b51011 | 648 | int partition = 0; |
4fbec260 | 649 | int ret = 0; |
39a5235c | 650 | bool seen_cache = false; |
ded9d2d5 | 651 | bool seen_discard = false; |
39a5235c | 652 | bool seen_aio = false; |
a517e88b | 653 | pthread_t client_thread; |
e6b63677 | 654 | const char *fmt = NULL; |
34b5d2c6 | 655 | Error *local_err = NULL; |
b3838a40 | 656 | BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
4fbec260 | 657 | QDict *options = NULL; |
68b96f15 | 658 | const char *export_name = NULL; /* defaults to "" later for server mode */ |
b1a75b33 | 659 | const char *export_description = NULL; |
636192c4 | 660 | const char *bitmap = NULL; |
145614a1 | 661 | const char *tlscredsid = NULL; |
77c9aaef | 662 | bool imageOpts = false; |
6effd5bf | 663 | bool writethrough = true; |
39ca463e | 664 | char *trace_file = NULL; |
ffb31e1d | 665 | bool fork_process = false; |
68b96f15 | 666 | bool list = false; |
ffb31e1d | 667 | int old_stderr = -1; |
a721f53b | 668 | unsigned socket_activation; |
7a5ca864 | 669 | |
a517e88b PB |
670 | /* The client thread uses SIGTERM to interrupt the server. A signal |
671 | * handler ensures that "qemu-nbd -v -c" exits with a nice status code. | |
672 | */ | |
bb345110 | 673 | struct sigaction sa_sigterm; |
bb345110 PB |
674 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
675 | sa_sigterm.sa_handler = termsig_handler; | |
676 | sigaction(SIGTERM, &sa_sigterm, NULL); | |
c2297088 | 677 | |
041e32b8 HR |
678 | #ifdef CONFIG_POSIX |
679 | signal(SIGPIPE, SIG_IGN); | |
680 | #endif | |
681 | ||
f5852efa | 682 | error_init(argv[0]); |
fe4db84d | 683 | module_call_init(MODULE_INIT_TRACE); |
e8f2d272 | 684 | qcrypto_init(&error_fatal); |
c2297088 | 685 | |
0ab3b337 DB |
686 | module_call_init(MODULE_INIT_QOM); |
687 | qemu_add_opts(&qemu_object_opts); | |
39ca463e | 688 | qemu_add_opts(&qemu_trace_opts); |
10f5bff6 | 689 | qemu_init_exec_dir(argv[0]); |
bb345110 | 690 | |
7a5ca864 FB |
691 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
692 | switch (ch) { | |
693 | case 's': | |
2f726488 TS |
694 | flags |= BDRV_O_SNAPSHOT; |
695 | break; | |
696 | case 'n': | |
39a5235c PB |
697 | optarg = (char *) "none"; |
698 | /* fallthrough */ | |
699 | case QEMU_NBD_OPT_CACHE: | |
700 | if (seen_cache) { | |
85b01e09 MA |
701 | error_report("-n and --cache can only be specified once"); |
702 | exit(EXIT_FAILURE); | |
39a5235c PB |
703 | } |
704 | seen_cache = true; | |
6effd5bf | 705 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { |
85b01e09 MA |
706 | error_report("Invalid cache mode `%s'", optarg); |
707 | exit(EXIT_FAILURE); | |
39a5235c | 708 | } |
7a5ca864 | 709 | break; |
39a5235c PB |
710 | case QEMU_NBD_OPT_AIO: |
711 | if (seen_aio) { | |
85b01e09 MA |
712 | error_report("--aio can only be specified once"); |
713 | exit(EXIT_FAILURE); | |
39a5235c PB |
714 | } |
715 | seen_aio = true; | |
716 | if (!strcmp(optarg, "native")) { | |
717 | flags |= BDRV_O_NATIVE_AIO; | |
718 | } else if (!strcmp(optarg, "threads")) { | |
719 | /* this is the default */ | |
720 | } else { | |
85b01e09 MA |
721 | error_report("invalid aio mode `%s'", optarg); |
722 | exit(EXIT_FAILURE); | |
39a5235c PB |
723 | } |
724 | break; | |
ded9d2d5 PB |
725 | case QEMU_NBD_OPT_DISCARD: |
726 | if (seen_discard) { | |
85b01e09 MA |
727 | error_report("--discard can only be specified once"); |
728 | exit(EXIT_FAILURE); | |
ded9d2d5 PB |
729 | } |
730 | seen_discard = true; | |
731 | if (bdrv_parse_discard_flags(optarg, &flags) == -1) { | |
85b01e09 MA |
732 | error_report("Invalid discard mode `%s'", optarg); |
733 | exit(EXIT_FAILURE); | |
ded9d2d5 PB |
734 | } |
735 | break; | |
b3838a40 PL |
736 | case QEMU_NBD_OPT_DETECT_ZEROES: |
737 | detect_zeroes = | |
f7abe0ec | 738 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
b3838a40 | 739 | optarg, |
b3838a40 PL |
740 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
741 | &local_err); | |
742 | if (local_err) { | |
c29b77f9 MA |
743 | error_reportf_err(local_err, |
744 | "Failed to parse detect_zeroes mode: "); | |
85b01e09 | 745 | exit(EXIT_FAILURE); |
b3838a40 PL |
746 | } |
747 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && | |
748 | !(flags & BDRV_O_UNMAP)) { | |
85b01e09 MA |
749 | error_report("setting detect-zeroes to unmap is not allowed " |
750 | "without setting discard operation to unmap"); | |
751 | exit(EXIT_FAILURE); | |
b3838a40 PL |
752 | } |
753 | break; | |
7a5ca864 FB |
754 | case 'b': |
755 | bindto = optarg; | |
756 | break; | |
757 | case 'p': | |
48bec07e | 758 | port = optarg; |
7a5ca864 FB |
759 | break; |
760 | case 'o': | |
43b51011 EB |
761 | if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { |
762 | error_report("Invalid offset '%s'", optarg); | |
85b01e09 | 763 | exit(EXIT_FAILURE); |
7a5ca864 | 764 | } |
7a5ca864 | 765 | break; |
8c116b0e WX |
766 | case 'l': |
767 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
70b94331 MA |
768 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, |
769 | optarg, false); | |
8c116b0e | 770 | if (!sn_opts) { |
85b01e09 MA |
771 | error_report("Failed in parsing snapshot param `%s'", |
772 | optarg); | |
773 | exit(EXIT_FAILURE); | |
8c116b0e WX |
774 | } |
775 | } else { | |
776 | sn_id_or_name = optarg; | |
777 | } | |
778 | /* fall through */ | |
7a5ca864 | 779 | case 'r': |
b90fb4b8 | 780 | nbdflags |= NBD_FLAG_READ_ONLY; |
07108b29 | 781 | flags &= ~BDRV_O_RDWR; |
7a5ca864 FB |
782 | break; |
783 | case 'P': | |
0ae2d546 EB |
784 | warn_report("The '-P' option is deprecated; use --image-opts with " |
785 | "a raw device wrapper for subset exports instead"); | |
43b51011 EB |
786 | if (qemu_strtoi(optarg, NULL, 0, &partition) < 0 || |
787 | partition < 1 || partition > 8) { | |
788 | error_report("Invalid partition '%s'", optarg); | |
85b01e09 | 789 | exit(EXIT_FAILURE); |
713cc671 | 790 | } |
7a5ca864 | 791 | break; |
636192c4 EB |
792 | case 'B': |
793 | bitmap = optarg; | |
794 | break; | |
cd831bd7 | 795 | case 'k': |
b32f6c28 | 796 | sockpath = optarg; |
713cc671 | 797 | if (sockpath[0] != '/') { |
9af9e0fe | 798 | error_report("socket path must be absolute"); |
85b01e09 | 799 | exit(EXIT_FAILURE); |
713cc671 | 800 | } |
cd831bd7 TS |
801 | break; |
802 | case 'd': | |
803 | disconnect = true; | |
804 | break; | |
805 | case 'c': | |
806 | device = optarg; | |
807 | break; | |
3b05a8e9 | 808 | case 'e': |
43b51011 EB |
809 | if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || |
810 | shared < 1) { | |
85b01e09 MA |
811 | error_report("Invalid shared device number '%s'", optarg); |
812 | exit(EXIT_FAILURE); | |
3b05a8e9 | 813 | } |
3b05a8e9 | 814 | break; |
e6b63677 DB |
815 | case 'f': |
816 | fmt = optarg; | |
817 | break; | |
713cc671 PL |
818 | case 't': |
819 | persistent = 1; | |
820 | break; | |
3d4b2f9c DB |
821 | case 'x': |
822 | export_name = optarg; | |
823 | break; | |
b1a75b33 EB |
824 | case 'D': |
825 | export_description = optarg; | |
826 | break; | |
7a5ca864 FB |
827 | case 'v': |
828 | verbose = 1; | |
829 | break; | |
830 | case 'V': | |
831 | version(argv[0]); | |
832 | exit(0); | |
833 | break; | |
834 | case 'h': | |
835 | usage(argv[0]); | |
836 | exit(0); | |
837 | break; | |
838 | case '?': | |
85b01e09 MA |
839 | error_report("Try `%s --help' for more information.", argv[0]); |
840 | exit(EXIT_FAILURE); | |
0ab3b337 DB |
841 | case QEMU_NBD_OPT_OBJECT: { |
842 | QemuOpts *opts; | |
843 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
844 | optarg, true); | |
845 | if (!opts) { | |
846 | exit(EXIT_FAILURE); | |
847 | } | |
848 | } break; | |
145614a1 DB |
849 | case QEMU_NBD_OPT_TLSCREDS: |
850 | tlscredsid = optarg; | |
851 | break; | |
77c9aaef DB |
852 | case QEMU_NBD_OPT_IMAGE_OPTS: |
853 | imageOpts = true; | |
854 | break; | |
39ca463e DL |
855 | case 'T': |
856 | g_free(trace_file); | |
857 | trace_file = trace_opt_parse(optarg); | |
858 | break; | |
b25e12da DB |
859 | case QEMU_NBD_OPT_TLSAUTHZ: |
860 | tlsauthz = optarg; | |
861 | break; | |
ffb31e1d HR |
862 | case QEMU_NBD_OPT_FORK: |
863 | fork_process = true; | |
864 | break; | |
68b96f15 EB |
865 | case 'L': |
866 | list = true; | |
867 | break; | |
7a5ca864 FB |
868 | } |
869 | } | |
870 | ||
68b96f15 EB |
871 | if (list) { |
872 | if (argc != optind) { | |
873 | error_report("List mode is incompatible with a file name"); | |
874 | exit(EXIT_FAILURE); | |
875 | } | |
876 | if (export_name || export_description || dev_offset || partition || | |
877 | device || disconnect || fmt || sn_id_or_name || bitmap || | |
878 | seen_aio || seen_discard || seen_cache) { | |
879 | error_report("List mode is incompatible with per-device settings"); | |
880 | exit(EXIT_FAILURE); | |
881 | } | |
882 | if (fork_process) { | |
883 | error_report("List mode is incompatible with forking"); | |
884 | exit(EXIT_FAILURE); | |
885 | } | |
886 | } else if ((argc - optind) != 1) { | |
433672b0 MA |
887 | error_report("Invalid number of arguments"); |
888 | error_printf("Try `%s --help' for more information.\n", argv[0]); | |
85b01e09 | 889 | exit(EXIT_FAILURE); |
68b96f15 EB |
890 | } else if (!export_name) { |
891 | export_name = ""; | |
7a5ca864 FB |
892 | } |
893 | ||
7e1e0c11 MA |
894 | qemu_opts_foreach(&qemu_object_opts, |
895 | user_creatable_add_opts_foreach, | |
896 | NULL, &error_fatal); | |
0ab3b337 | 897 | |
39ca463e DL |
898 | if (!trace_init_backends()) { |
899 | exit(1); | |
900 | } | |
901 | trace_init_file(trace_file); | |
902 | qemu_set_log(LOG_TRACE); | |
903 | ||
a721f53b RJ |
904 | socket_activation = check_socket_activation(); |
905 | if (socket_activation == 0) { | |
906 | setup_address_and_port(&bindto, &port); | |
907 | } else { | |
908 | /* Using socket activation - check user didn't use -p etc. */ | |
909 | const char *err_msg = socket_activation_validate_opts(device, sockpath, | |
68b96f15 EB |
910 | bindto, port, |
911 | list); | |
a721f53b RJ |
912 | if (err_msg != NULL) { |
913 | error_report("%s", err_msg); | |
914 | exit(EXIT_FAILURE); | |
915 | } | |
53fabd4b PB |
916 | |
917 | /* qemu-nbd can only listen on a single socket. */ | |
918 | if (socket_activation > 1) { | |
919 | error_report("qemu-nbd does not support socket activation with %s > 1", | |
920 | "LISTEN_FDS"); | |
921 | exit(EXIT_FAILURE); | |
922 | } | |
a721f53b RJ |
923 | } |
924 | ||
145614a1 DB |
925 | if (tlscredsid) { |
926 | if (sockpath) { | |
927 | error_report("TLS is only supported with IPv4/IPv6"); | |
928 | exit(EXIT_FAILURE); | |
929 | } | |
930 | if (device) { | |
931 | error_report("TLS is not supported with a host device"); | |
932 | exit(EXIT_FAILURE); | |
933 | } | |
b25e12da DB |
934 | if (tlsauthz && list) { |
935 | error_report("TLS authorization is incompatible with export list"); | |
936 | exit(EXIT_FAILURE); | |
937 | } | |
68b96f15 | 938 | tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); |
145614a1 DB |
939 | if (local_err) { |
940 | error_report("Failed to get TLS creds %s", | |
941 | error_get_pretty(local_err)); | |
942 | exit(EXIT_FAILURE); | |
943 | } | |
b25e12da DB |
944 | } else { |
945 | if (tlsauthz) { | |
946 | error_report("--tls-authz is not permitted without --tls-creds"); | |
947 | exit(EXIT_FAILURE); | |
948 | } | |
145614a1 DB |
949 | } |
950 | ||
68b96f15 EB |
951 | if (list) { |
952 | saddr = nbd_build_socket_address(sockpath, bindto, port); | |
953 | return qemu_nbd_client_list(saddr, tlscreds, bindto); | |
954 | } | |
955 | ||
3c1fa35d EB |
956 | #if !HAVE_NBD_DEVICE |
957 | if (disconnect || device) { | |
958 | error_report("Kernel /dev/nbdN support not available"); | |
959 | exit(EXIT_FAILURE); | |
960 | } | |
961 | #else /* HAVE_NBD_DEVICE */ | |
cd831bd7 | 962 | if (disconnect) { |
d0d6ff58 DB |
963 | int nbdfd = open(argv[optind], O_RDWR); |
964 | if (nbdfd < 0) { | |
85b01e09 MA |
965 | error_report("Cannot open %s: %s", argv[optind], |
966 | strerror(errno)); | |
967 | exit(EXIT_FAILURE); | |
fc19f8a0 | 968 | } |
d0d6ff58 | 969 | nbd_disconnect(nbdfd); |
cd831bd7 | 970 | |
d0d6ff58 | 971 | close(nbdfd); |
cd831bd7 TS |
972 | |
973 | printf("%s disconnected\n", argv[optind]); | |
974 | ||
713cc671 | 975 | return 0; |
cd831bd7 | 976 | } |
3c1fa35d | 977 | #endif |
cd831bd7 | 978 | |
ffb31e1d | 979 | if ((device && !verbose) || fork_process) { |
c1f8fdc3 PB |
980 | int stderr_fd[2]; |
981 | pid_t pid; | |
982 | int ret; | |
983 | ||
fc19f8a0 | 984 | if (qemu_pipe(stderr_fd) < 0) { |
85b01e09 MA |
985 | error_report("Error setting up communication pipe: %s", |
986 | strerror(errno)); | |
987 | exit(EXIT_FAILURE); | |
c1f8fdc3 PB |
988 | } |
989 | ||
990 | /* Now daemonize, but keep a communication channel open to | |
991 | * print errors and exit with the proper status code. | |
992 | */ | |
993 | pid = fork(); | |
70d4739e | 994 | if (pid < 0) { |
85b01e09 MA |
995 | error_report("Failed to fork: %s", strerror(errno)); |
996 | exit(EXIT_FAILURE); | |
70d4739e | 997 | } else if (pid == 0) { |
c1f8fdc3 | 998 | close(stderr_fd[0]); |
9faf31b6 | 999 | ret = qemu_daemon(1, 0); |
c1f8fdc3 PB |
1000 | |
1001 | /* Temporarily redirect stderr to the parent's pipe... */ | |
ffb31e1d | 1002 | old_stderr = dup(STDERR_FILENO); |
c1f8fdc3 | 1003 | dup2(stderr_fd[1], STDERR_FILENO); |
fc19f8a0 | 1004 | if (ret < 0) { |
85b01e09 MA |
1005 | error_report("Failed to daemonize: %s", strerror(errno)); |
1006 | exit(EXIT_FAILURE); | |
c1f8fdc3 PB |
1007 | } |
1008 | ||
1009 | /* ... close the descriptor we inherited and go on. */ | |
1010 | close(stderr_fd[1]); | |
1011 | } else { | |
1012 | bool errors = false; | |
1013 | char *buf; | |
1014 | ||
1015 | /* In the parent. Print error messages from the child until | |
1016 | * it closes the pipe. | |
1017 | */ | |
1018 | close(stderr_fd[1]); | |
1019 | buf = g_malloc(1024); | |
1020 | while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { | |
1021 | errors = true; | |
1022 | ret = qemu_write_full(STDERR_FILENO, buf, ret); | |
fc19f8a0 | 1023 | if (ret < 0) { |
c1f8fdc3 PB |
1024 | exit(EXIT_FAILURE); |
1025 | } | |
1026 | } | |
fc19f8a0 | 1027 | if (ret < 0) { |
85b01e09 MA |
1028 | error_report("Cannot read from daemon: %s", |
1029 | strerror(errno)); | |
1030 | exit(EXIT_FAILURE); | |
c1f8fdc3 PB |
1031 | } |
1032 | ||
1033 | /* Usually the daemon should not print any message. | |
1034 | * Exit with zero status in that case. | |
1035 | */ | |
1036 | exit(errors); | |
1037 | } | |
1038 | } | |
1039 | ||
a6ac2313 PB |
1040 | if (device != NULL && sockpath == NULL) { |
1041 | sockpath = g_malloc(128); | |
1042 | snprintf(sockpath, 128, SOCKET_PATH, basename(device)); | |
cd831bd7 TS |
1043 | } |
1044 | ||
e4849c1d | 1045 | server = qio_net_listener_new(); |
a721f53b | 1046 | if (socket_activation == 0) { |
a721f53b | 1047 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
e4849c1d DB |
1048 | if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { |
1049 | object_unref(OBJECT(server)); | |
a721f53b | 1050 | error_report_err(local_err); |
e4849c1d | 1051 | exit(EXIT_FAILURE); |
a721f53b RJ |
1052 | } |
1053 | } else { | |
e4849c1d | 1054 | size_t i; |
a721f53b | 1055 | /* See comment in check_socket_activation above. */ |
e4849c1d DB |
1056 | for (i = 0; i < socket_activation; i++) { |
1057 | QIOChannelSocket *sioc; | |
1058 | sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, | |
1059 | &local_err); | |
1060 | if (sioc == NULL) { | |
1061 | object_unref(OBJECT(server)); | |
1062 | error_report("Failed to use socket activation: %s", | |
1063 | error_get_pretty(local_err)); | |
1064 | exit(EXIT_FAILURE); | |
1065 | } | |
1066 | qio_net_listener_add(server, sioc); | |
1067 | object_unref(OBJECT(sioc)); | |
a721f53b RJ |
1068 | } |
1069 | } | |
48bec07e | 1070 | |
2f78e491 | 1071 | if (qemu_init_main_loop(&local_err)) { |
565f65d2 | 1072 | error_report_err(local_err); |
2f78e491 CN |
1073 | exit(EXIT_FAILURE); |
1074 | } | |
802ddc37 | 1075 | bdrv_init(); |
b3b5299d | 1076 | atexit(qemu_nbd_shutdown); |
802ddc37 | 1077 | |
77c9aaef DB |
1078 | srcpath = argv[optind]; |
1079 | if (imageOpts) { | |
1080 | QemuOpts *opts; | |
1081 | if (fmt) { | |
1082 | error_report("--image-opts and -f are mutually exclusive"); | |
1083 | exit(EXIT_FAILURE); | |
1084 | } | |
1085 | opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); | |
1086 | if (!opts) { | |
1087 | qemu_opts_reset(&file_opts); | |
1088 | exit(EXIT_FAILURE); | |
1089 | } | |
1090 | options = qemu_opts_to_qdict(opts, NULL); | |
1091 | qemu_opts_reset(&file_opts); | |
efaa7c4e | 1092 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); |
77c9aaef DB |
1093 | } else { |
1094 | if (fmt) { | |
1095 | options = qdict_new(); | |
46f5ac20 | 1096 | qdict_put_str(options, "driver", fmt); |
77c9aaef | 1097 | } |
efaa7c4e | 1098 | blk = blk_new_open(srcpath, NULL, options, flags, &local_err); |
e6b63677 DB |
1099 | } |
1100 | ||
4fbec260 | 1101 | if (!blk) { |
c29b77f9 MA |
1102 | error_reportf_err(local_err, "Failed to blk_new_open '%s': ", |
1103 | argv[optind]); | |
85b01e09 | 1104 | exit(EXIT_FAILURE); |
802ddc37 | 1105 | } |
4fbec260 | 1106 | bs = blk_bs(blk); |
802ddc37 | 1107 | |
6effd5bf KW |
1108 | blk_set_enable_write_cache(blk, !writethrough); |
1109 | ||
8c116b0e WX |
1110 | if (sn_opts) { |
1111 | ret = bdrv_snapshot_load_tmp(bs, | |
1112 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
1113 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
1114 | &local_err); | |
1115 | } else if (sn_id_or_name) { | |
1116 | ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, | |
1117 | &local_err); | |
1118 | } | |
1119 | if (ret < 0) { | |
c29b77f9 | 1120 | error_reportf_err(local_err, "Failed to load snapshot: "); |
85b01e09 | 1121 | exit(EXIT_FAILURE); |
8c116b0e WX |
1122 | } |
1123 | ||
b3838a40 | 1124 | bs->detect_zeroes = detect_zeroes; |
4c58e80a | 1125 | fd_size = blk_getlength(blk); |
98f44bbe | 1126 | if (fd_size < 0) { |
85b01e09 MA |
1127 | error_report("Failed to determine the image length: %s", |
1128 | strerror(-fd_size)); | |
1129 | exit(EXIT_FAILURE); | |
98f44bbe | 1130 | } |
802ddc37 | 1131 | |
e424b655 | 1132 | if (dev_offset >= fd_size) { |
9d26dfcb EB |
1133 | error_report("Offset (%" PRIu64 ") has to be smaller than the image " |
1134 | "size (%" PRId64 ")", dev_offset, fd_size); | |
e424b655 TG |
1135 | exit(EXIT_FAILURE); |
1136 | } | |
1137 | fd_size -= dev_offset; | |
1138 | ||
43b51011 | 1139 | if (partition) { |
9d26dfcb | 1140 | uint64_t limit; |
4485936b EB |
1141 | |
1142 | if (dev_offset) { | |
1143 | error_report("Cannot request partition and offset together"); | |
1144 | exit(EXIT_FAILURE); | |
1145 | } | |
1146 | ret = find_partition(blk, partition, &dev_offset, &limit); | |
185b4338 | 1147 | if (ret < 0) { |
85b01e09 | 1148 | error_report("Could not find partition %d: %s", partition, |
a4699e55 | 1149 | strerror(-ret)); |
85b01e09 | 1150 | exit(EXIT_FAILURE); |
185b4338 | 1151 | } |
4485936b EB |
1152 | /* |
1153 | * MBR partition limits are (32-bit << 9); this assert lets | |
9d26dfcb | 1154 | * the compiler know that we can't overflow 64 bits. |
4485936b | 1155 | */ |
9d26dfcb | 1156 | assert(dev_offset + limit >= dev_offset); |
4485936b | 1157 | if (dev_offset + limit > fd_size) { |
9d26dfcb EB |
1158 | error_report("Discovered partition %d at offset %" PRIu64 |
1159 | " size %" PRIu64 ", but size exceeds file length %" | |
1160 | PRId64, partition, dev_offset, limit, fd_size); | |
4485936b EB |
1161 | exit(EXIT_FAILURE); |
1162 | } | |
1163 | fd_size = limit; | |
802ddc37 PB |
1164 | } |
1165 | ||
3fa4c765 | 1166 | export = nbd_export_new(bs, dev_offset, fd_size, export_name, |
636192c4 | 1167 | export_description, bitmap, nbdflags, |
678ba275 EB |
1168 | nbd_export_closed, writethrough, NULL, |
1169 | &error_fatal); | |
3b05a8e9 | 1170 | |
f1ef5555 | 1171 | if (device) { |
3c1fa35d | 1172 | #if HAVE_NBD_DEVICE |
f1ef5555 PB |
1173 | int ret; |
1174 | ||
a6ac2313 | 1175 | ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); |
f1ef5555 | 1176 | if (ret != 0) { |
85b01e09 MA |
1177 | error_report("Failed to create client thread: %s", strerror(ret)); |
1178 | exit(EXIT_FAILURE); | |
f1ef5555 | 1179 | } |
3c1fa35d | 1180 | #endif |
f1ef5555 PB |
1181 | } else { |
1182 | /* Shut up GCC warnings. */ | |
1183 | memset(&client_thread, 0, sizeof(client_thread)); | |
1184 | } | |
1185 | ||
d0d6ff58 | 1186 | nbd_update_server_watch(); |
7a5ca864 | 1187 | |
9faf31b6 MT |
1188 | /* now when the initialization is (almost) complete, chdir("/") |
1189 | * to free any busy filesystems */ | |
1190 | if (chdir("/") < 0) { | |
85b01e09 MA |
1191 | error_report("Could not chdir to root directory: %s", |
1192 | strerror(errno)); | |
1193 | exit(EXIT_FAILURE); | |
9faf31b6 MT |
1194 | } |
1195 | ||
ffb31e1d HR |
1196 | if (fork_process) { |
1197 | dup2(old_stderr, STDERR_FILENO); | |
1198 | close(old_stderr); | |
1199 | } | |
1200 | ||
7860a380 | 1201 | state = RUNNING; |
3b05a8e9 | 1202 | do { |
a61c6782 | 1203 | main_loop_wait(false); |
7860a380 PB |
1204 | if (state == TERMINATE) { |
1205 | state = TERMINATING; | |
9d976580 PMD |
1206 | nbd_export_close(export); |
1207 | nbd_export_put(export); | |
1208 | export = NULL; | |
7860a380 PB |
1209 | } |
1210 | } while (state != TERMINATED); | |
7a5ca864 | 1211 | |
26f54e9a | 1212 | blk_unref(blk); |
b32f6c28 PB |
1213 | if (sockpath) { |
1214 | unlink(sockpath); | |
1215 | } | |
7a5ca864 | 1216 | |
fbf28a43 | 1217 | qemu_opts_del(sn_opts); |
8c116b0e | 1218 | |
a517e88b PB |
1219 | if (device) { |
1220 | void *ret; | |
1221 | pthread_join(client_thread, &ret); | |
1222 | exit(ret != NULL); | |
1223 | } else { | |
1224 | exit(EXIT_SUCCESS); | |
1225 | } | |
7a5ca864 | 1226 | } |