Revision 8c116b0e qemu-nbd.c
| b/qemu-nbd.c | ||
|---|---|---|
| 20 | 20 |
#include "block/block.h" |
| 21 | 21 |
#include "block/nbd.h" |
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#include "qemu/main-loop.h" |
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#include "block/snapshot.h" |
|
| 23 | 24 |
|
| 24 | 25 |
#include <stdarg.h> |
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#include <stdio.h> |
| ... | ... | |
| 79 | 80 |
"\n" |
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"Block device options:\n" |
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" -r, --read-only export read-only\n" |
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" -s, --snapshot use snapshot file\n" |
|
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" -s, --snapshot use FILE as an external snapshot, create a temporary\n" |
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" file with backing_file=FILE, redirect the write to\n" |
|
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" the temporary one\n" |
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" -l, --load-snapshot=SNAPSHOT_PARAM\n" |
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" load an internal snapshot inside FILE and export it\n" |
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" as an read-only device, SNAPSHOT_PARAM format is\n" |
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" 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
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" '[ID_OR_NAME]'\n" |
|
| 83 | 91 |
" -n, --nocache disable host cache\n" |
| 84 | 92 |
" --cache=MODE set cache mode (none, writeback, ...)\n" |
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#ifdef CONFIG_LINUX_AIO |
| ... | ... | |
| 315 | 323 |
char *device = NULL; |
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int port = NBD_DEFAULT_PORT; |
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off_t fd_size; |
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const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:t"; |
|
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QemuOpts *sn_opts = NULL; |
|
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const char *sn_id_or_name = NULL; |
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const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:"; |
|
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struct option lopt[] = {
|
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{ "help", 0, NULL, 'h' },
|
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{ "version", 0, NULL, 'V' },
|
| ... | ... | |
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{ "connect", 1, NULL, 'c' },
|
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{ "disconnect", 0, NULL, 'd' },
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{ "snapshot", 0, NULL, 's' },
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{ "load-snapshot", 1, NULL, 'l' },
|
|
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{ "nocache", 0, NULL, 'n' },
|
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{ "cache", 1, NULL, QEMU_NBD_OPT_CACHE },
|
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#ifdef CONFIG_LINUX_AIO |
| ... | ... | |
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errx(EXIT_FAILURE, "Offset must be positive `%s'", optarg); |
| 429 | 440 |
} |
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break; |
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case 'l': |
|
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if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
|
|
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sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0); |
|
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if (!sn_opts) {
|
|
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errx(EXIT_FAILURE, "Failed in parsing snapshot param `%s'", |
|
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optarg); |
|
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} |
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} else {
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sn_id_or_name = optarg; |
|
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} |
|
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/* fall through */ |
|
| 431 | 453 |
case 'r': |
| 432 | 454 |
nbdflags |= NBD_FLAG_READ_ONLY; |
| 433 | 455 |
flags &= ~BDRV_O_RDWR; |
| ... | ... | |
| 581 | 603 |
error_get_pretty(local_err)); |
| 582 | 604 |
} |
| 583 | 605 |
|
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if (sn_opts) {
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ret = bdrv_snapshot_load_tmp(bs, |
|
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qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
|
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qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
|
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&local_err); |
|
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} else if (sn_id_or_name) {
|
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ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, |
|
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&local_err); |
|
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} |
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if (ret < 0) {
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errno = -ret; |
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err(EXIT_FAILURE, |
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"Failed to load snapshot: %s", |
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error_get_pretty(local_err)); |
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} |
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|
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fd_size = bdrv_getlength(bs); |
| 585 | 623 |
|
| 586 | 624 |
if (partition != -1) {
|
| ... | ... | |
| 641 | 679 |
unlink(sockpath); |
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} |
| 643 | 681 |
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if (sn_opts) {
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qemu_opts_del(sn_opts); |
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} |
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|
|
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if (device) {
|
| 645 | 687 |
void *ret; |
| 646 | 688 |
pthread_join(client_thread, &ret); |
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