1cd831bd7Sths /* 27a5ca864Sbellard * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> 37a5ca864Sbellard * 47a5ca864Sbellard * Network Block Device 57a5ca864Sbellard * 67a5ca864Sbellard * This program is free software; you can redistribute it and/or modify 77a5ca864Sbellard * it under the terms of the GNU General Public License as published by 87a5ca864Sbellard * the Free Software Foundation; under version 2 of the License. 97a5ca864Sbellard * 107a5ca864Sbellard * This program is distributed in the hope that it will be useful, 117a5ca864Sbellard * but WITHOUT ANY WARRANTY; without even the implied warranty of 127a5ca864Sbellard * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 137a5ca864Sbellard * GNU General Public License for more details. 147a5ca864Sbellard * 157a5ca864Sbellard * You should have received a copy of the GNU General Public License 168167ee88SBlue Swirl * along with this program; if not, see <http://www.gnu.org/licenses/>. 177a5ca864Sbellard */ 187a5ca864Sbellard 19d38ea87aSPeter Maydell #include "qemu/osdep.h" 20c2a3d7daSEric Blake #include <getopt.h> 21c2a3d7daSEric Blake #include <libgen.h> 22c2a3d7daSEric Blake #include <pthread.h> 23c2a3d7daSEric Blake 24a8d25326SMarkus Armbruster #include "qemu-common.h" 25da34e65cSMarkus Armbruster #include "qapi/error.h" 26f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2726f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 28b3838a40SPeter Lieven #include "block/block_int.h" 29737e150eSPaolo Bonzini #include "block/nbd.h" 306a1751b7SAlex Bligh #include "qemu/main-loop.h" 310b8fa32fSMarkus Armbruster #include "qemu/module.h" 32922a01a0SMarkus Armbruster #include "qemu/option.h" 33537b41f5SPaolo Bonzini #include "qemu/error-report.h" 340ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3558369e22SPaolo Bonzini #include "qemu/bswap.h" 3639ca463eSDenis V. Lunev #include "qemu/log.h" 3753fabd4bSPaolo Bonzini #include "qemu/systemd.h" 388c116b0eSWenchao Xia #include "block/snapshot.h" 39452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 40d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 410ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 42d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 43e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 44c2297088SDaniel P. Berrange #include "crypto/init.h" 4539ca463eSDenis V. Lunev #include "trace/control.h" 46be377133SEric Blake #include "qemu-version.h" 477a5ca864Sbellard 483c1fa35dSEric Blake #ifdef __linux__ 493c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 503c1fa35dSEric Blake #else 513c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 523c1fa35dSEric Blake #endif 533c1fa35dSEric Blake 54cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 55fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 56fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 57fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 58fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 59fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 60fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 61fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 62ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 63b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 64637bc5a5SMax Reitz #define QEMU_NBD_OPT_PID_FILE 265 657a5ca864Sbellard 66bd31c214SEric Blake #define MBR_SIZE 512 67bd31c214SEric Blake 689d976580SPhilippe Mathieu-Daudé static NBDExport *export; 69b1d8e52eSblueswir1 static int verbose; 70a517e88bSPaolo Bonzini static char *srcpath; 71bd269ebcSMarkus Armbruster static SocketAddress *saddr; 727860a380SPaolo Bonzini static int persistent = 0; 737860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 74a61c6782SPaolo Bonzini static int shared = 1; 75a61c6782SPaolo Bonzini static int nb_fds; 76e4849c1dSDaniel P. Berrange static QIONetListener *server; 77145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 78b25e12daSDaniel P. Berrange static const char *tlsauthz; 797a5ca864Sbellard 807a5ca864Sbellard static void usage(const char *name) 817a5ca864Sbellard { 82b033cd86SPaolo Bonzini (printf) ( 837a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8468b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8568b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 867a5ca864Sbellard "\n" 877a5ca864Sbellard " -h, --help display this help and exit\n" 887a5ca864Sbellard " -V, --version output version information and exit\n" 897a5ca864Sbellard "\n" 90b033cd86SPaolo Bonzini "Connection properties:\n" 91b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 92b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 93b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 94b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 95b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 96b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 97b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 98f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 99f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 100b033cd86SPaolo Bonzini "\n" 101b033cd86SPaolo Bonzini "Exposing part of the image:\n" 102b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 103636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 104b033cd86SPaolo Bonzini "\n" 1050ab3b337SDaniel P. Berrange "General purpose options:\n" 10668b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1070ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1080ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 109f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 110b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 111b25e12daSDaniel P. Berrange " authorization\n" 11239ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11339ca463eSDenis V. Lunev " specify tracing options\n" 114ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 115ffb31e1dSMax Reitz " once the server is running\n" 116637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1173c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1183c1fa35dSEric Blake "\n" 119b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 120b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 121b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 122b033cd86SPaolo Bonzini #endif 123b033cd86SPaolo Bonzini "\n" 124b033cd86SPaolo Bonzini "Block device options:\n" 1254323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 126b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1278c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1288c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1298c116b0eSWenchao Xia " the temporary one\n" 1308c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1318c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1328c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1338c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1348c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 135b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 13639a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 1377680274dSAarushi Mehta " --aio=MODE set AIO mode (native, io_uring or threads)\n" 138b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1396883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 14077c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 141b033cd86SPaolo Bonzini "\n" 142f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 14368b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1447a5ca864Sbellard } 1457a5ca864Sbellard 1467a5ca864Sbellard static void version(const char *name) 1477a5ca864Sbellard { 1487a5ca864Sbellard printf( 1497e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1507a5ca864Sbellard "Written by Anthony Liguori.\n" 1517a5ca864Sbellard "\n" 152be377133SEric Blake QEMU_COPYRIGHT "\n" 1537a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1547a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 155315bc7aaSths , name); 1567a5ca864Sbellard } 1577a5ca864Sbellard 1586e64dd57SDaniel P. Berrangé #if HAVE_NBD_DEVICE 159bb345110SPaolo Bonzini static void termsig_handler(int signum) 160bb345110SPaolo Bonzini { 161*d73415a3SStefan Hajnoczi qatomic_cmpxchg(&state, RUNNING, TERMINATE); 162a61c6782SPaolo Bonzini qemu_notify_event(); 163bb345110SPaolo Bonzini } 1646e64dd57SDaniel P. Berrangé #endif /* HAVE_NBD_DEVICE */ 165537b41f5SPaolo Bonzini 16668b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 16768b96f15SEric Blake const char *hostname) 16868b96f15SEric Blake { 16968b96f15SEric Blake int ret = EXIT_FAILURE; 17068b96f15SEric Blake int rc; 17168b96f15SEric Blake Error *err = NULL; 17268b96f15SEric Blake QIOChannelSocket *sioc; 17368b96f15SEric Blake NBDExportInfo *list; 17468b96f15SEric Blake int i, j; 17568b96f15SEric Blake 17668b96f15SEric Blake sioc = qio_channel_socket_new(); 17768b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 17868b96f15SEric Blake error_report_err(err); 17968b96f15SEric Blake return EXIT_FAILURE; 18068b96f15SEric Blake } 18168b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 18268b96f15SEric Blake &err); 18368b96f15SEric Blake if (rc < 0) { 18468b96f15SEric Blake if (err) { 18568b96f15SEric Blake error_report_err(err); 18668b96f15SEric Blake } 18768b96f15SEric Blake goto out; 18868b96f15SEric Blake } 18968b96f15SEric Blake printf("exports available: %d\n", rc); 19068b96f15SEric Blake for (i = 0; i < rc; i++) { 19168b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 19268b96f15SEric Blake if (list[i].description && *list[i].description) { 19368b96f15SEric Blake printf(" description: %s\n", list[i].description); 19468b96f15SEric Blake } 19568b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 196c4e2aff8SMax Reitz static const char *const flag_names[] = { 197c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 198c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 199c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 200c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 201c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 202c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 203c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 204c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 205c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 206c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2070a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 208c4e2aff8SMax Reitz }; 209c4e2aff8SMax Reitz 21068b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 21168b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 212c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 213c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 214c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 21568b96f15SEric Blake } 21668b96f15SEric Blake } 21768b96f15SEric Blake printf(" )\n"); 21868b96f15SEric Blake } 21968b96f15SEric Blake if (list[i].min_block) { 22068b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 22168b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 22268b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 22368b96f15SEric Blake } 22468b96f15SEric Blake if (list[i].n_contexts) { 22568b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 22668b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 22768b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 22868b96f15SEric Blake } 22968b96f15SEric Blake } 23068b96f15SEric Blake } 23168b96f15SEric Blake nbd_free_export_list(list, rc); 23268b96f15SEric Blake 23368b96f15SEric Blake ret = EXIT_SUCCESS; 23468b96f15SEric Blake out: 23568b96f15SEric Blake object_unref(OBJECT(sioc)); 23668b96f15SEric Blake return ret; 23768b96f15SEric Blake } 23868b96f15SEric Blake 23968b96f15SEric Blake 2403c1fa35dSEric Blake #if HAVE_NBD_DEVICE 241a517e88bSPaolo Bonzini static void *show_parts(void *arg) 242cd831bd7Sths { 243a6ac2313SPaolo Bonzini char *device = arg; 244cd831bd7Sths int nbd; 245cd831bd7Sths 246cd831bd7Sths /* linux just needs an open() to trigger 247cd831bd7Sths * the partition table update 248cd831bd7Sths * but remember to load the module with max_part != 0 : 249cd831bd7Sths * modprobe nbd max_part=63 250cd831bd7Sths */ 251cd831bd7Sths nbd = open(device, O_RDWR); 252fc19f8a0SPaolo Bonzini if (nbd >= 0) { 253cd831bd7Sths close(nbd); 254cd831bd7Sths } 255a517e88bSPaolo Bonzini return NULL; 256a517e88bSPaolo Bonzini } 257a517e88bSPaolo Bonzini 258a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 259a517e88bSPaolo Bonzini { 260a6ac2313SPaolo Bonzini char *device = arg; 2616dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 262d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 263d0d6ff58SDaniel P. Berrange int fd; 264a517e88bSPaolo Bonzini int ret; 265a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2661ce52846SMax Reitz Error *local_error = NULL; 267a517e88bSPaolo Bonzini 268d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 269d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 270d0d6ff58SDaniel P. Berrange saddr, 271d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27248bec07eSDaniel P. Berrange error_report_err(local_error); 273a517e88bSPaolo Bonzini goto out; 274a517e88bSPaolo Bonzini } 275a517e88bSPaolo Bonzini 276a8e2bb6aSVladimir Sementsov-Ogievskiy ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 277004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 278fc19f8a0SPaolo Bonzini if (ret < 0) { 2791ce52846SMax Reitz if (local_error) { 28078288671SMarkus Armbruster error_report_err(local_error); 2811ce52846SMax Reitz } 2820c544d73SPaolo Bonzini goto out_socket; 283a517e88bSPaolo Bonzini } 284a517e88bSPaolo Bonzini 285a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 286fc19f8a0SPaolo Bonzini if (fd < 0) { 287a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 288b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2890c544d73SPaolo Bonzini goto out_socket; 290a6ac2313SPaolo Bonzini } 291a6ac2313SPaolo Bonzini 292004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 293fc19f8a0SPaolo Bonzini if (ret < 0) { 294be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 2950c544d73SPaolo Bonzini goto out_fd; 296a517e88bSPaolo Bonzini } 297a517e88bSPaolo Bonzini 298a517e88bSPaolo Bonzini /* update partition table */ 299a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 300a517e88bSPaolo Bonzini 301c1f8fdc3SPaolo Bonzini if (verbose) { 302a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 303a517e88bSPaolo Bonzini device, srcpath); 304c1f8fdc3SPaolo Bonzini } else { 305c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 306c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 307c1f8fdc3SPaolo Bonzini } 308a517e88bSPaolo Bonzini 309a517e88bSPaolo Bonzini ret = nbd_client(fd); 310a517e88bSPaolo Bonzini if (ret) { 3110c544d73SPaolo Bonzini goto out_fd; 312a517e88bSPaolo Bonzini } 313a517e88bSPaolo Bonzini close(fd); 314d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 3156dc1667dSEric Blake g_free(info.name); 316a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 317a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 318a517e88bSPaolo Bonzini 3190c544d73SPaolo Bonzini out_fd: 3200c544d73SPaolo Bonzini close(fd); 3210c544d73SPaolo Bonzini out_socket: 322d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 323a517e88bSPaolo Bonzini out: 3246dc1667dSEric Blake g_free(info.name); 325a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 326a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 327cd831bd7Sths } 3283c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 329cd831bd7Sths 330e4afbf4fSFam Zheng static int nbd_can_accept(void) 331a61c6782SPaolo Bonzini { 332df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 333a61c6782SPaolo Bonzini } 334a61c6782SPaolo Bonzini 3359d976580SPhilippe Mathieu-Daudé static void nbd_export_closed(NBDExport *export) 3367860a380SPaolo Bonzini { 3377860a380SPaolo Bonzini assert(state == TERMINATING); 3387860a380SPaolo Bonzini state = TERMINATED; 3397860a380SPaolo Bonzini } 3407860a380SPaolo Bonzini 341d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 342e4afbf4fSFam Zheng 3430c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 344a61c6782SPaolo Bonzini { 345a61c6782SPaolo Bonzini nb_fds--; 3460c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3477860a380SPaolo Bonzini state = TERMINATE; 3487860a380SPaolo Bonzini } 349d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3507860a380SPaolo Bonzini nbd_client_put(client); 351a61c6782SPaolo Bonzini } 352a61c6782SPaolo Bonzini 353e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 354e4849c1dSDaniel P. Berrange gpointer opaque) 355a61c6782SPaolo Bonzini { 3567860a380SPaolo Bonzini if (state >= TERMINATE) { 357e4849c1dSDaniel P. Berrange return; 3587860a380SPaolo Bonzini } 3597860a380SPaolo Bonzini 360a61c6782SPaolo Bonzini nb_fds++; 361d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 362b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 363d0d6ff58SDaniel P. Berrange } 364d0d6ff58SDaniel P. Berrange 365d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 366e4afbf4fSFam Zheng { 367e4afbf4fSFam Zheng if (nbd_can_accept()) { 368e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 369e4afbf4fSFam Zheng } else { 370e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 371e4afbf4fSFam Zheng } 372e4afbf4fSFam Zheng } 373e4afbf4fSFam Zheng 37448bec07eSDaniel P. Berrange 375bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 37648bec07eSDaniel P. Berrange const char *bindto, 37748bec07eSDaniel P. Berrange const char *port) 37848bec07eSDaniel P. Berrange { 379bd269ebcSMarkus Armbruster SocketAddress *saddr; 38048bec07eSDaniel P. Berrange 381bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 38248bec07eSDaniel P. Berrange if (sockpath) { 383bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 384bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 38548bec07eSDaniel P. Berrange } else { 3860399293eSEric Blake InetSocketAddress *inet; 387bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 388bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3890399293eSEric Blake inet->host = g_strdup(bindto); 39048bec07eSDaniel P. Berrange if (port) { 3910399293eSEric Blake inet->port = g_strdup(port); 39248bec07eSDaniel P. Berrange } else { 3930399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39448bec07eSDaniel P. Berrange } 39548bec07eSDaniel P. Berrange } 39648bec07eSDaniel P. Berrange 39748bec07eSDaniel P. Berrange return saddr; 39848bec07eSDaniel P. Berrange } 39948bec07eSDaniel P. Berrange 40048bec07eSDaniel P. Berrange 40177c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40277c9aaefSDaniel P. Berrange .name = "file", 40377c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40477c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40577c9aaefSDaniel P. Berrange .desc = { 40677c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40777c9aaefSDaniel P. Berrange { /* end of list */ } 40877c9aaefSDaniel P. Berrange }, 40977c9aaefSDaniel P. Berrange }; 41077c9aaefSDaniel P. Berrange 4110ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4120ab3b337SDaniel P. Berrange .name = "object", 4130ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4140ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4150ab3b337SDaniel P. Berrange .desc = { 4160ab3b337SDaniel P. Berrange { } 4170ab3b337SDaniel P. Berrange }, 4180ab3b337SDaniel P. Berrange }; 4190ab3b337SDaniel P. Berrange 420495bf893SKevin Wolf static bool qemu_nbd_object_print_help(const char *type, QemuOpts *opts) 421495bf893SKevin Wolf { 422495bf893SKevin Wolf if (user_creatable_print_help(type, opts)) { 423495bf893SKevin Wolf exit(0); 424495bf893SKevin Wolf } 425495bf893SKevin Wolf return true; 426495bf893SKevin Wolf } 4270ab3b337SDaniel P. Berrange 428145614a1SDaniel P. Berrange 42968b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 43068b96f15SEric Blake Error **errp) 431145614a1SDaniel P. Berrange { 432145614a1SDaniel P. Berrange Object *obj; 433145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 434145614a1SDaniel P. Berrange 435145614a1SDaniel P. Berrange obj = object_resolve_path_component( 436145614a1SDaniel P. Berrange object_get_objects_root(), id); 437145614a1SDaniel P. Berrange if (!obj) { 438145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 439145614a1SDaniel P. Berrange id); 440145614a1SDaniel P. Berrange return NULL; 441145614a1SDaniel P. Berrange } 442145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 443145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 444145614a1SDaniel P. Berrange if (!creds) { 445145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 446145614a1SDaniel P. Berrange id); 447145614a1SDaniel P. Berrange return NULL; 448145614a1SDaniel P. Berrange } 449145614a1SDaniel P. Berrange 45068b96f15SEric Blake if (list) { 45168b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 45268b96f15SEric Blake error_setg(errp, 45368b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 45468b96f15SEric Blake return NULL; 45568b96f15SEric Blake } 45668b96f15SEric Blake } else { 457145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 458145614a1SDaniel P. Berrange error_setg(errp, 459145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 460145614a1SDaniel P. Berrange return NULL; 461145614a1SDaniel P. Berrange } 46268b96f15SEric Blake } 463145614a1SDaniel P. Berrange object_ref(obj); 464145614a1SDaniel P. Berrange return creds; 465145614a1SDaniel P. Berrange } 466145614a1SDaniel P. Berrange 467a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 468a721f53bSRichard W.M. Jones { 469a721f53bSRichard W.M. Jones if (*address == NULL) { 470a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 471a721f53bSRichard W.M. Jones } 472a721f53bSRichard W.M. Jones 473a721f53bSRichard W.M. Jones if (*port == NULL) { 474a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 475a721f53bSRichard W.M. Jones } 476a721f53bSRichard W.M. Jones } 477a721f53bSRichard W.M. Jones 478a721f53bSRichard W.M. Jones /* 479a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 480a721f53bSRichard W.M. Jones */ 481a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 482a721f53bSRichard W.M. Jones const char *sockpath, 483a721f53bSRichard W.M. Jones const char *address, 48468b96f15SEric Blake const char *port, 48568b96f15SEric Blake bool list) 486a721f53bSRichard W.M. Jones { 487a721f53bSRichard W.M. Jones if (device != NULL) { 488a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 489a721f53bSRichard W.M. Jones } 490a721f53bSRichard W.M. Jones 491a721f53bSRichard W.M. Jones if (sockpath != NULL) { 492a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 493a721f53bSRichard W.M. Jones } 494a721f53bSRichard W.M. Jones 495a721f53bSRichard W.M. Jones if (address != NULL) { 496a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 497a721f53bSRichard W.M. Jones } 498a721f53bSRichard W.M. Jones 499a721f53bSRichard W.M. Jones if (port != NULL) { 500a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 501a721f53bSRichard W.M. Jones } 502a721f53bSRichard W.M. Jones 50368b96f15SEric Blake if (list) { 50468b96f15SEric Blake return "List mode is incompatible with socket activation"; 50568b96f15SEric Blake } 50668b96f15SEric Blake 507a721f53bSRichard W.M. Jones return NULL; 508a721f53bSRichard W.M. Jones } 509145614a1SDaniel P. Berrange 510b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 511b3b5299dSKevin Wolf { 512b3b5299dSKevin Wolf job_cancel_sync_all(); 513b3b5299dSKevin Wolf bdrv_close_all(); 514b3b5299dSKevin Wolf } 515b3b5299dSKevin Wolf 5167a5ca864Sbellard int main(int argc, char **argv) 5177a5ca864Sbellard { 51826f54e9aSMarkus Armbruster BlockBackend *blk; 5197a5ca864Sbellard BlockDriverState *bs; 5209d26dfcbSEric Blake uint64_t dev_offset = 0; 521dbb38caaSEric Blake bool readonly = false; 522cd831bd7Sths bool disconnect = false; 523a721f53bSRichard W.M. Jones const char *bindto = NULL; 52448bec07eSDaniel P. Berrange const char *port = NULL; 52548bec07eSDaniel P. Berrange char *sockpath = NULL; 526a6ac2313SPaolo Bonzini char *device = NULL; 5279d26dfcbSEric Blake int64_t fd_size; 5288c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5298c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 5300bc16997SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:B:L"; 5317a5ca864Sbellard struct option lopt[] = { 532aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 533aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 534aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 535aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 536aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 537aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 538aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 539636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 540aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 541aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 54268b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 543aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 544aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 545aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 546aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 547aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 548aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 549aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 550aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 551aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 552aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 553aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 554aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 555aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 556aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 557b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 558aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 559b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 560aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 56139ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 562ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 563637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 564660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5657a5ca864Sbellard }; 5667a5ca864Sbellard int ch; 5677a5ca864Sbellard int opt_ind = 0; 568f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5694fbec260SMax Reitz int ret = 0; 57039a5235cSPaolo Bonzini bool seen_cache = false; 571ded9d2d5SPaolo Bonzini bool seen_discard = false; 57239a5235cSPaolo Bonzini bool seen_aio = false; 573a517e88bSPaolo Bonzini pthread_t client_thread; 574e6b63677SDaniel P. Berrange const char *fmt = NULL; 57534b5d2c6SMax Reitz Error *local_err = NULL; 576b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5774fbec260SMax Reitz QDict *options = NULL; 57868b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 579b1a75b33SEric Blake const char *export_description = NULL; 580636192c4SEric Blake const char *bitmap = NULL; 581145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 58277c9aaefSDaniel P. Berrange bool imageOpts = false; 5836effd5bfSKevin Wolf bool writethrough = true; 58439ca463eSDenis V. Lunev char *trace_file = NULL; 585ffb31e1dSMax Reitz bool fork_process = false; 58668b96f15SEric Blake bool list = false; 587ffb31e1dSMax Reitz int old_stderr = -1; 588a721f53bSRichard W.M. Jones unsigned socket_activation; 589637bc5a5SMax Reitz const char *pid_file_name = NULL; 5907a5ca864Sbellard 5916e64dd57SDaniel P. Berrangé #if HAVE_NBD_DEVICE 592a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 593a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 594a517e88bSPaolo Bonzini */ 595bb345110SPaolo Bonzini struct sigaction sa_sigterm; 596bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 597bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 598bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 5996e64dd57SDaniel P. Berrangé #endif /* HAVE_NBD_DEVICE */ 600c2297088SDaniel P. Berrange 601041e32b8SMax Reitz #ifdef CONFIG_POSIX 602041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 603041e32b8SMax Reitz #endif 604041e32b8SMax Reitz 60598c5d2e7SDaniel P. Berrangé socket_init(); 606f5852efaSChristophe Fergeau error_init(argv[0]); 607fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 608e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 609c2297088SDaniel P. Berrange 6100ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 6110ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 61239ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 61310f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 614bb345110SPaolo Bonzini 6157a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6167a5ca864Sbellard switch (ch) { 6177a5ca864Sbellard case 's': 6182f726488Sths flags |= BDRV_O_SNAPSHOT; 6192f726488Sths break; 6202f726488Sths case 'n': 62139a5235cSPaolo Bonzini optarg = (char *) "none"; 62239a5235cSPaolo Bonzini /* fallthrough */ 62339a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 62439a5235cSPaolo Bonzini if (seen_cache) { 62585b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 62685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62739a5235cSPaolo Bonzini } 62839a5235cSPaolo Bonzini seen_cache = true; 6296effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 63085b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 63185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63239a5235cSPaolo Bonzini } 6337a5ca864Sbellard break; 63439a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 63539a5235cSPaolo Bonzini if (seen_aio) { 63685b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 63785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63839a5235cSPaolo Bonzini } 63939a5235cSPaolo Bonzini seen_aio = true; 6407680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6417680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 64285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 64339a5235cSPaolo Bonzini } 64439a5235cSPaolo Bonzini break; 645ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 646ded9d2d5SPaolo Bonzini if (seen_discard) { 64785b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 64885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 649ded9d2d5SPaolo Bonzini } 650ded9d2d5SPaolo Bonzini seen_discard = true; 651ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 65285b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 65385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 654ded9d2d5SPaolo Bonzini } 655ded9d2d5SPaolo Bonzini break; 656b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 657b3838a40SPeter Lieven detect_zeroes = 658f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 659b3838a40SPeter Lieven optarg, 660b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 661b3838a40SPeter Lieven &local_err); 662b3838a40SPeter Lieven if (local_err) { 663c29b77f9SMarkus Armbruster error_reportf_err(local_err, 664c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 66585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 666b3838a40SPeter Lieven } 667b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 668b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 66985b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 670b3838a40SPeter Lieven "without setting discard operation to unmap"); 67185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 672b3838a40SPeter Lieven } 673b3838a40SPeter Lieven break; 6747a5ca864Sbellard case 'b': 6757a5ca864Sbellard bindto = optarg; 6767a5ca864Sbellard break; 6777a5ca864Sbellard case 'p': 67848bec07eSDaniel P. Berrange port = optarg; 6797a5ca864Sbellard break; 6807a5ca864Sbellard case 'o': 68143b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 68243b51011SEric Blake error_report("Invalid offset '%s'", optarg); 68385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6847a5ca864Sbellard } 6857a5ca864Sbellard break; 6868c116b0eSWenchao Xia case 'l': 6878c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 68870b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 68970b94331SMarkus Armbruster optarg, false); 6908c116b0eSWenchao Xia if (!sn_opts) { 69185b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6928c116b0eSWenchao Xia optarg); 69385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6948c116b0eSWenchao Xia } 6958c116b0eSWenchao Xia } else { 6968c116b0eSWenchao Xia sn_id_or_name = optarg; 6978c116b0eSWenchao Xia } 6988c116b0eSWenchao Xia /* fall through */ 6997a5ca864Sbellard case 'r': 700dbb38caaSEric Blake readonly = true; 70107108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 7027a5ca864Sbellard break; 703636192c4SEric Blake case 'B': 704636192c4SEric Blake bitmap = optarg; 705636192c4SEric Blake break; 706cd831bd7Sths case 'k': 707b32f6c28SPaolo Bonzini sockpath = optarg; 708713cc671SPeter Lieven if (sockpath[0] != '/') { 7099af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 71085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 711713cc671SPeter Lieven } 712cd831bd7Sths break; 713cd831bd7Sths case 'd': 714cd831bd7Sths disconnect = true; 715cd831bd7Sths break; 716cd831bd7Sths case 'c': 717cd831bd7Sths device = optarg; 718cd831bd7Sths break; 7193b05a8e9Sths case 'e': 72043b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 72143b51011SEric Blake shared < 1) { 72285b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 72385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7243b05a8e9Sths } 7253b05a8e9Sths break; 726e6b63677SDaniel P. Berrange case 'f': 727e6b63677SDaniel P. Berrange fmt = optarg; 728e6b63677SDaniel P. Berrange break; 72975818250Sths case 't': 73075818250Sths persistent = 1; 73175818250Sths break; 7323d4b2f9cSDaniel P. Berrange case 'x': 7333d4b2f9cSDaniel P. Berrange export_name = optarg; 73493676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 73593676c88SEric Blake error_report("export name '%s' too long", export_name); 73693676c88SEric Blake exit(EXIT_FAILURE); 73793676c88SEric Blake } 7383d4b2f9cSDaniel P. Berrange break; 739b1a75b33SEric Blake case 'D': 740b1a75b33SEric Blake export_description = optarg; 74193676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 74293676c88SEric Blake error_report("export description '%s' too long", 74393676c88SEric Blake export_description); 74493676c88SEric Blake exit(EXIT_FAILURE); 74593676c88SEric Blake } 746b1a75b33SEric Blake break; 7477a5ca864Sbellard case 'v': 7487a5ca864Sbellard verbose = 1; 7497a5ca864Sbellard break; 7507a5ca864Sbellard case 'V': 7517a5ca864Sbellard version(argv[0]); 7527a5ca864Sbellard exit(0); 7537a5ca864Sbellard break; 7547a5ca864Sbellard case 'h': 7557a5ca864Sbellard usage(argv[0]); 7567a5ca864Sbellard exit(0); 7577a5ca864Sbellard break; 7587a5ca864Sbellard case '?': 75985b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 76085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7610ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7620ab3b337SDaniel P. Berrange QemuOpts *opts; 7630ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7640ab3b337SDaniel P. Berrange optarg, true); 7650ab3b337SDaniel P. Berrange if (!opts) { 7660ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7670ab3b337SDaniel P. Berrange } 7680ab3b337SDaniel P. Berrange } break; 769145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 770145614a1SDaniel P. Berrange tlscredsid = optarg; 771145614a1SDaniel P. Berrange break; 77277c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 77377c9aaefSDaniel P. Berrange imageOpts = true; 77477c9aaefSDaniel P. Berrange break; 77539ca463eSDenis V. Lunev case 'T': 77639ca463eSDenis V. Lunev g_free(trace_file); 77739ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 77839ca463eSDenis V. Lunev break; 779b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 780b25e12daSDaniel P. Berrange tlsauthz = optarg; 781b25e12daSDaniel P. Berrange break; 782ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 783ffb31e1dSMax Reitz fork_process = true; 784ffb31e1dSMax Reitz break; 78568b96f15SEric Blake case 'L': 78668b96f15SEric Blake list = true; 78768b96f15SEric Blake break; 788637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 789637bc5a5SMax Reitz pid_file_name = optarg; 790637bc5a5SMax Reitz break; 7917a5ca864Sbellard } 7927a5ca864Sbellard } 7937a5ca864Sbellard 79468b96f15SEric Blake if (list) { 79568b96f15SEric Blake if (argc != optind) { 79668b96f15SEric Blake error_report("List mode is incompatible with a file name"); 79768b96f15SEric Blake exit(EXIT_FAILURE); 79868b96f15SEric Blake } 7990bc16997SEric Blake if (export_name || export_description || dev_offset || 80068b96f15SEric Blake device || disconnect || fmt || sn_id_or_name || bitmap || 80168b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 80268b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 80368b96f15SEric Blake exit(EXIT_FAILURE); 80468b96f15SEric Blake } 80568b96f15SEric Blake if (fork_process) { 80668b96f15SEric Blake error_report("List mode is incompatible with forking"); 80768b96f15SEric Blake exit(EXIT_FAILURE); 80868b96f15SEric Blake } 80968b96f15SEric Blake } else if ((argc - optind) != 1) { 810433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 811433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 81285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 81368b96f15SEric Blake } else if (!export_name) { 81468b96f15SEric Blake export_name = ""; 8157a5ca864Sbellard } 8167a5ca864Sbellard 8177e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 8180ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 819495bf893SKevin Wolf qemu_nbd_object_print_help, &error_fatal); 8200ab3b337SDaniel P. Berrange 82139ca463eSDenis V. Lunev if (!trace_init_backends()) { 82239ca463eSDenis V. Lunev exit(1); 82339ca463eSDenis V. Lunev } 82439ca463eSDenis V. Lunev trace_init_file(trace_file); 82539ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 82639ca463eSDenis V. Lunev 827a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 828a721f53bSRichard W.M. Jones if (socket_activation == 0) { 829a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 830a721f53bSRichard W.M. Jones } else { 831a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 832a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 83368b96f15SEric Blake bindto, port, 83468b96f15SEric Blake list); 835a721f53bSRichard W.M. Jones if (err_msg != NULL) { 836a721f53bSRichard W.M. Jones error_report("%s", err_msg); 837a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 838a721f53bSRichard W.M. Jones } 83953fabd4bSPaolo Bonzini 84053fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 84153fabd4bSPaolo Bonzini if (socket_activation > 1) { 84253fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 84353fabd4bSPaolo Bonzini "LISTEN_FDS"); 84453fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 84553fabd4bSPaolo Bonzini } 846a721f53bSRichard W.M. Jones } 847a721f53bSRichard W.M. Jones 848145614a1SDaniel P. Berrange if (tlscredsid) { 849145614a1SDaniel P. Berrange if (sockpath) { 850145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 851145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 852145614a1SDaniel P. Berrange } 853145614a1SDaniel P. Berrange if (device) { 854145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 855145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 856145614a1SDaniel P. Berrange } 857b25e12daSDaniel P. Berrange if (tlsauthz && list) { 858b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 859b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 860b25e12daSDaniel P. Berrange } 86168b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 862145614a1SDaniel P. Berrange if (local_err) { 8635217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 864145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 865145614a1SDaniel P. Berrange } 866b25e12daSDaniel P. Berrange } else { 867b25e12daSDaniel P. Berrange if (tlsauthz) { 868b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 869b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 870b25e12daSDaniel P. Berrange } 871145614a1SDaniel P. Berrange } 872145614a1SDaniel P. Berrange 87368b96f15SEric Blake if (list) { 87468b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 87568b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 87668b96f15SEric Blake } 87768b96f15SEric Blake 8783c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8793c1fa35dSEric Blake if (disconnect || device) { 8803c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8813c1fa35dSEric Blake exit(EXIT_FAILURE); 8823c1fa35dSEric Blake } 8833c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 884cd831bd7Sths if (disconnect) { 885d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 886d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 88785b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 88885b01e09SMarkus Armbruster strerror(errno)); 88985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 890fc19f8a0SPaolo Bonzini } 891d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 892cd831bd7Sths 893d0d6ff58SDaniel P. Berrange close(nbdfd); 894cd831bd7Sths 895cd831bd7Sths printf("%s disconnected\n", argv[optind]); 896cd831bd7Sths 897cd831bd7Sths return 0; 898cd831bd7Sths } 8993c1fa35dSEric Blake #endif 900cd831bd7Sths 901ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 902eb705985SDaniel P. Berrangé #ifndef WIN32 903c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 904c1f8fdc3SPaolo Bonzini pid_t pid; 905c1f8fdc3SPaolo Bonzini int ret; 906c1f8fdc3SPaolo Bonzini 907fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 90885b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 90985b01e09SMarkus Armbruster strerror(errno)); 91085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 911c1f8fdc3SPaolo Bonzini } 912c1f8fdc3SPaolo Bonzini 913c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 914c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 915c1f8fdc3SPaolo Bonzini */ 916c1f8fdc3SPaolo Bonzini pid = fork(); 91770d4739eSMax Reitz if (pid < 0) { 91885b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 91985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 92070d4739eSMax Reitz } else if (pid == 0) { 921c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 922e6df58a5SMax Reitz 9230eaf453eSRaphael Pour /* Remember parent's stderr if we will be restoring it. */ 9240eaf453eSRaphael Pour if (fork_process) { 925e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 9260eaf453eSRaphael Pour } 9270eaf453eSRaphael Pour 9289faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 929c1f8fdc3SPaolo Bonzini 930c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 931c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 932fc19f8a0SPaolo Bonzini if (ret < 0) { 93385b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 93485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 935c1f8fdc3SPaolo Bonzini } 936c1f8fdc3SPaolo Bonzini 937c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 938c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 939c1f8fdc3SPaolo Bonzini } else { 940c1f8fdc3SPaolo Bonzini bool errors = false; 941c1f8fdc3SPaolo Bonzini char *buf; 942c1f8fdc3SPaolo Bonzini 943c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 944c1f8fdc3SPaolo Bonzini * it closes the pipe. 945c1f8fdc3SPaolo Bonzini */ 946c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 947c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 948c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 949c1f8fdc3SPaolo Bonzini errors = true; 950c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 951fc19f8a0SPaolo Bonzini if (ret < 0) { 952c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 953c1f8fdc3SPaolo Bonzini } 954c1f8fdc3SPaolo Bonzini } 955fc19f8a0SPaolo Bonzini if (ret < 0) { 95685b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 95785b01e09SMarkus Armbruster strerror(errno)); 95885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 959c1f8fdc3SPaolo Bonzini } 960c1f8fdc3SPaolo Bonzini 961c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 962c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 963c1f8fdc3SPaolo Bonzini */ 964c1f8fdc3SPaolo Bonzini exit(errors); 965c1f8fdc3SPaolo Bonzini } 966eb705985SDaniel P. Berrangé #else /* WIN32 */ 967eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 968eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 969eb705985SDaniel P. Berrangé #endif /* WIN32 */ 970c1f8fdc3SPaolo Bonzini } 971c1f8fdc3SPaolo Bonzini 972a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 973b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 974b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 975cd831bd7Sths } 976cd831bd7Sths 977e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 978a721f53bSRichard W.M. Jones if (socket_activation == 0) { 97948bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 980fc8135c6SJuan Quintela if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { 981e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 982a721f53bSRichard W.M. Jones error_report_err(local_err); 983e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 984a721f53bSRichard W.M. Jones } 985a721f53bSRichard W.M. Jones } else { 986e4849c1dSDaniel P. Berrange size_t i; 987a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 988e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 989e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 990e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 991a721f53bSRichard W.M. Jones &local_err); 992e4849c1dSDaniel P. Berrange if (sioc == NULL) { 993e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 9945217f188SMarkus Armbruster error_reportf_err(local_err, 9955217f188SMarkus Armbruster "Failed to use socket activation: "); 996a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 997a721f53bSRichard W.M. Jones } 998e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 999e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1000e4849c1dSDaniel P. Berrange } 1001a721f53bSRichard W.M. Jones } 100248bec07eSDaniel P. Berrange 10032f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 1004565f65d2SMarkus Armbruster error_report_err(local_err); 10052f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 10062f78e491SChrysostomos Nanakos } 1007802ddc37SPaolo Bonzini bdrv_init(); 1008b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1009802ddc37SPaolo Bonzini 101077c9aaefSDaniel P. Berrange srcpath = argv[optind]; 101177c9aaefSDaniel P. Berrange if (imageOpts) { 101277c9aaefSDaniel P. Berrange QemuOpts *opts; 101377c9aaefSDaniel P. Berrange if (fmt) { 101477c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 101577c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 101677c9aaefSDaniel P. Berrange } 101777c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 101877c9aaefSDaniel P. Berrange if (!opts) { 101977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 102077c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 102177c9aaefSDaniel P. Berrange } 102277c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 102377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1024efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 102577c9aaefSDaniel P. Berrange } else { 1026e6b63677SDaniel P. Berrange if (fmt) { 10274fbec260SMax Reitz options = qdict_new(); 102846f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1029e6b63677SDaniel P. Berrange } 1030efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 103177c9aaefSDaniel P. Berrange } 103277c9aaefSDaniel P. Berrange 10334fbec260SMax Reitz if (!blk) { 1034c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1035c29b77f9SMarkus Armbruster argv[optind]); 103685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1037802ddc37SPaolo Bonzini } 10384fbec260SMax Reitz bs = blk_bs(blk); 1039802ddc37SPaolo Bonzini 10406effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 10416effd5bfSKevin Wolf 10428c116b0eSWenchao Xia if (sn_opts) { 10438c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 10448c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 10458c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 10468c116b0eSWenchao Xia &local_err); 10478c116b0eSWenchao Xia } else if (sn_id_or_name) { 10488c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 10498c116b0eSWenchao Xia &local_err); 10508c116b0eSWenchao Xia } 10518c116b0eSWenchao Xia if (ret < 0) { 1052c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 105385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10548c116b0eSWenchao Xia } 10558c116b0eSWenchao Xia 1056b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 10574c58e80aSMax Reitz fd_size = blk_getlength(blk); 105898f44bbeSMax Reitz if (fd_size < 0) { 105985b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 106098f44bbeSMax Reitz strerror(-fd_size)); 106185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 106298f44bbeSMax Reitz } 1063802ddc37SPaolo Bonzini 1064e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 10659d26dfcbSEric Blake error_report("Offset (%" PRIu64 ") has to be smaller than the image " 10669d26dfcbSEric Blake "size (%" PRId64 ")", dev_offset, fd_size); 1067e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1068e424b655STomáš Golembiovský } 1069e424b655STomáš Golembiovský fd_size -= dev_offset; 1070e424b655STomáš Golembiovský 10713fa4c765SEric Blake export = nbd_export_new(bs, dev_offset, fd_size, export_name, 1072dbb38caaSEric Blake export_description, bitmap, readonly, shared > 1, 1073678ba275SEric Blake nbd_export_closed, writethrough, NULL, 1074678ba275SEric Blake &error_fatal); 10753b05a8e9Sths 1076f1ef5555SPaolo Bonzini if (device) { 10773c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1078f1ef5555SPaolo Bonzini int ret; 1079f1ef5555SPaolo Bonzini 1080a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1081f1ef5555SPaolo Bonzini if (ret != 0) { 108285b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 108385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1084f1ef5555SPaolo Bonzini } 10853c1fa35dSEric Blake #endif 1086f1ef5555SPaolo Bonzini } else { 1087f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1088f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1089f1ef5555SPaolo Bonzini } 1090f1ef5555SPaolo Bonzini 1091d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10927a5ca864Sbellard 1093637bc5a5SMax Reitz if (pid_file_name) { 1094637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1095637bc5a5SMax Reitz } 1096637bc5a5SMax Reitz 10979faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 10989faf31b6SMichael Tokarev * to free any busy filesystems */ 10999faf31b6SMichael Tokarev if (chdir("/") < 0) { 110085b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 110185b01e09SMarkus Armbruster strerror(errno)); 110285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11039faf31b6SMichael Tokarev } 11049faf31b6SMichael Tokarev 1105ffb31e1dSMax Reitz if (fork_process) { 1106ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1107ffb31e1dSMax Reitz close(old_stderr); 1108ffb31e1dSMax Reitz } 1109ffb31e1dSMax Reitz 11107860a380SPaolo Bonzini state = RUNNING; 11113b05a8e9Sths do { 1112a61c6782SPaolo Bonzini main_loop_wait(false); 11137860a380SPaolo Bonzini if (state == TERMINATE) { 11147860a380SPaolo Bonzini state = TERMINATING; 11159d976580SPhilippe Mathieu-Daudé nbd_export_close(export); 11169d976580SPhilippe Mathieu-Daudé nbd_export_put(export); 11179d976580SPhilippe Mathieu-Daudé export = NULL; 11187860a380SPaolo Bonzini } 11197860a380SPaolo Bonzini } while (state != TERMINATED); 11202c8d9f06SPaolo Bonzini 112126f54e9aSMarkus Armbruster blk_unref(blk); 1122b32f6c28SPaolo Bonzini if (sockpath) { 1123b32f6c28SPaolo Bonzini unlink(sockpath); 1124b32f6c28SPaolo Bonzini } 11257a5ca864Sbellard 11268c116b0eSWenchao Xia qemu_opts_del(sn_opts); 11278c116b0eSWenchao Xia 1128a517e88bSPaolo Bonzini if (device) { 1129a517e88bSPaolo Bonzini void *ret; 1130a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1131a517e88bSPaolo Bonzini exit(ret != NULL); 1132a517e88bSPaolo Bonzini } else { 1133a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1134a517e88bSPaolo Bonzini } 11357a5ca864Sbellard } 1136