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" 28cbc20bfbSStefan Hajnoczi #include "sysemu/runstate.h" /* for qemu_system_killed() prototype */ 29b3838a40SPeter Lieven #include "block/block_int.h" 30737e150eSPaolo Bonzini #include "block/nbd.h" 316a1751b7SAlex Bligh #include "qemu/main-loop.h" 320b8fa32fSMarkus Armbruster #include "qemu/module.h" 33922a01a0SMarkus Armbruster #include "qemu/option.h" 34537b41f5SPaolo Bonzini #include "qemu/error-report.h" 350ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3658369e22SPaolo Bonzini #include "qemu/bswap.h" 3739ca463eSDenis V. Lunev #include "qemu/log.h" 3853fabd4bSPaolo Bonzini #include "qemu/systemd.h" 398c116b0eSWenchao Xia #include "block/snapshot.h" 40452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 41d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 420ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 43d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 44e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 45c2297088SDaniel P. Berrange #include "crypto/init.h" 4639ca463eSDenis V. Lunev #include "trace/control.h" 47be377133SEric Blake #include "qemu-version.h" 487a5ca864Sbellard 493c1fa35dSEric Blake #ifdef __linux__ 503c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 513c1fa35dSEric Blake #else 523c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 533c1fa35dSEric Blake #endif 543c1fa35dSEric Blake 55cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 56fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 57fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 58fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 59fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 60fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 61fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 62fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 63ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 64b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 65637bc5a5SMax Reitz #define QEMU_NBD_OPT_PID_FILE 265 667a5ca864Sbellard 67bd31c214SEric Blake #define MBR_SIZE 512 68bd31c214SEric Blake 69b1d8e52eSblueswir1 static int verbose; 70a517e88bSPaolo Bonzini static char *srcpath; 71bd269ebcSMarkus Armbruster static SocketAddress *saddr; 727860a380SPaolo Bonzini static int persistent = 0; 73d794f7f3SKevin Wolf static enum { RUNNING, TERMINATE, 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 158029a88c9SEric Blake #ifdef CONFIG_POSIX 159cbc20bfbSStefan Hajnoczi /* 160cbc20bfbSStefan Hajnoczi * The client thread uses SIGTERM to interrupt the server. A signal 161cbc20bfbSStefan Hajnoczi * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 162cbc20bfbSStefan Hajnoczi */ 163cbc20bfbSStefan Hajnoczi void qemu_system_killed(int signum, pid_t pid) 164bb345110SPaolo Bonzini { 165d73415a3SStefan Hajnoczi qatomic_cmpxchg(&state, RUNNING, TERMINATE); 166a61c6782SPaolo Bonzini qemu_notify_event(); 167bb345110SPaolo Bonzini } 168029a88c9SEric Blake #endif /* CONFIG_POSIX */ 169537b41f5SPaolo Bonzini 17068b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 17168b96f15SEric Blake const char *hostname) 17268b96f15SEric Blake { 17368b96f15SEric Blake int ret = EXIT_FAILURE; 17468b96f15SEric Blake int rc; 17568b96f15SEric Blake Error *err = NULL; 17668b96f15SEric Blake QIOChannelSocket *sioc; 17768b96f15SEric Blake NBDExportInfo *list; 17868b96f15SEric Blake int i, j; 17968b96f15SEric Blake 18068b96f15SEric Blake sioc = qio_channel_socket_new(); 18168b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 18268b96f15SEric Blake error_report_err(err); 18368b96f15SEric Blake return EXIT_FAILURE; 18468b96f15SEric Blake } 18568b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 18668b96f15SEric Blake &err); 18768b96f15SEric Blake if (rc < 0) { 18868b96f15SEric Blake if (err) { 18968b96f15SEric Blake error_report_err(err); 19068b96f15SEric Blake } 19168b96f15SEric Blake goto out; 19268b96f15SEric Blake } 19368b96f15SEric Blake printf("exports available: %d\n", rc); 19468b96f15SEric Blake for (i = 0; i < rc; i++) { 19568b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 19668b96f15SEric Blake if (list[i].description && *list[i].description) { 19768b96f15SEric Blake printf(" description: %s\n", list[i].description); 19868b96f15SEric Blake } 19968b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 200c4e2aff8SMax Reitz static const char *const flag_names[] = { 201c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 202c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 203c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 204c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 205c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 206c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 207c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 208c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 209c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 210c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2110a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 212c4e2aff8SMax Reitz }; 213c4e2aff8SMax Reitz 21468b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 21568b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 216c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 217c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 218c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 21968b96f15SEric Blake } 22068b96f15SEric Blake } 22168b96f15SEric Blake printf(" )\n"); 22268b96f15SEric Blake } 22368b96f15SEric Blake if (list[i].min_block) { 22468b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 22568b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 22668b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 22768b96f15SEric Blake } 22868b96f15SEric Blake if (list[i].n_contexts) { 22968b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 23068b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 23168b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 23268b96f15SEric Blake } 23368b96f15SEric Blake } 23468b96f15SEric Blake } 23568b96f15SEric Blake nbd_free_export_list(list, rc); 23668b96f15SEric Blake 23768b96f15SEric Blake ret = EXIT_SUCCESS; 23868b96f15SEric Blake out: 23968b96f15SEric Blake object_unref(OBJECT(sioc)); 24068b96f15SEric Blake return ret; 24168b96f15SEric Blake } 24268b96f15SEric Blake 24368b96f15SEric Blake 2443c1fa35dSEric Blake #if HAVE_NBD_DEVICE 245a517e88bSPaolo Bonzini static void *show_parts(void *arg) 246cd831bd7Sths { 247a6ac2313SPaolo Bonzini char *device = arg; 248cd831bd7Sths int nbd; 249cd831bd7Sths 250cd831bd7Sths /* linux just needs an open() to trigger 251cd831bd7Sths * the partition table update 252cd831bd7Sths * but remember to load the module with max_part != 0 : 253cd831bd7Sths * modprobe nbd max_part=63 254cd831bd7Sths */ 255cd831bd7Sths nbd = open(device, O_RDWR); 256fc19f8a0SPaolo Bonzini if (nbd >= 0) { 257cd831bd7Sths close(nbd); 258cd831bd7Sths } 259a517e88bSPaolo Bonzini return NULL; 260a517e88bSPaolo Bonzini } 261a517e88bSPaolo Bonzini 262a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 263a517e88bSPaolo Bonzini { 264a6ac2313SPaolo Bonzini char *device = arg; 2656dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 266d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 267d0d6ff58SDaniel P. Berrange int fd; 268a517e88bSPaolo Bonzini int ret; 269a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2701ce52846SMax Reitz Error *local_error = NULL; 271a517e88bSPaolo Bonzini 272d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 273d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 274d0d6ff58SDaniel P. Berrange saddr, 275d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27648bec07eSDaniel P. Berrange error_report_err(local_error); 277a517e88bSPaolo Bonzini goto out; 278a517e88bSPaolo Bonzini } 279a517e88bSPaolo Bonzini 280a8e2bb6aSVladimir Sementsov-Ogievskiy ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 281004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 282fc19f8a0SPaolo Bonzini if (ret < 0) { 2831ce52846SMax Reitz if (local_error) { 28478288671SMarkus Armbruster error_report_err(local_error); 2851ce52846SMax Reitz } 2860c544d73SPaolo Bonzini goto out_socket; 287a517e88bSPaolo Bonzini } 288a517e88bSPaolo Bonzini 289a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 290fc19f8a0SPaolo Bonzini if (fd < 0) { 291a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 292b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2930c544d73SPaolo Bonzini goto out_socket; 294a6ac2313SPaolo Bonzini } 295a6ac2313SPaolo Bonzini 296004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 297fc19f8a0SPaolo Bonzini if (ret < 0) { 298be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 2990c544d73SPaolo Bonzini goto out_fd; 300a517e88bSPaolo Bonzini } 301a517e88bSPaolo Bonzini 302a517e88bSPaolo Bonzini /* update partition table */ 303a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 304a517e88bSPaolo Bonzini 305c1f8fdc3SPaolo Bonzini if (verbose) { 306a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 307a517e88bSPaolo Bonzini device, srcpath); 308c1f8fdc3SPaolo Bonzini } else { 309c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 310c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 311c1f8fdc3SPaolo Bonzini } 312a517e88bSPaolo Bonzini 313a517e88bSPaolo Bonzini ret = nbd_client(fd); 314a517e88bSPaolo Bonzini if (ret) { 3150c544d73SPaolo Bonzini goto out_fd; 316a517e88bSPaolo Bonzini } 317a517e88bSPaolo Bonzini close(fd); 318d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 3196dc1667dSEric Blake g_free(info.name); 320a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 321a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 322a517e88bSPaolo Bonzini 3230c544d73SPaolo Bonzini out_fd: 3240c544d73SPaolo Bonzini close(fd); 3250c544d73SPaolo Bonzini out_socket: 326d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 327a517e88bSPaolo Bonzini out: 3286dc1667dSEric Blake g_free(info.name); 329a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 330a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 331cd831bd7Sths } 3323c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 333cd831bd7Sths 334e4afbf4fSFam Zheng static int nbd_can_accept(void) 335a61c6782SPaolo Bonzini { 336df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 337a61c6782SPaolo Bonzini } 338a61c6782SPaolo Bonzini 339d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 340e4afbf4fSFam Zheng 3410c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 342a61c6782SPaolo Bonzini { 343a61c6782SPaolo Bonzini nb_fds--; 3440c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3457860a380SPaolo Bonzini state = TERMINATE; 3467860a380SPaolo Bonzini } 347d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3487860a380SPaolo Bonzini nbd_client_put(client); 349a61c6782SPaolo Bonzini } 350a61c6782SPaolo Bonzini 351e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 352e4849c1dSDaniel P. Berrange gpointer opaque) 353a61c6782SPaolo Bonzini { 3547860a380SPaolo Bonzini if (state >= TERMINATE) { 355e4849c1dSDaniel P. Berrange return; 3567860a380SPaolo Bonzini } 3577860a380SPaolo Bonzini 358a61c6782SPaolo Bonzini nb_fds++; 359d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 360b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 361d0d6ff58SDaniel P. Berrange } 362d0d6ff58SDaniel P. Berrange 363d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 364e4afbf4fSFam Zheng { 365e4afbf4fSFam Zheng if (nbd_can_accept()) { 366e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 367e4afbf4fSFam Zheng } else { 368e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 369e4afbf4fSFam Zheng } 370e4afbf4fSFam Zheng } 371e4afbf4fSFam Zheng 37248bec07eSDaniel P. Berrange 373bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 37448bec07eSDaniel P. Berrange const char *bindto, 37548bec07eSDaniel P. Berrange const char *port) 37648bec07eSDaniel P. Berrange { 377bd269ebcSMarkus Armbruster SocketAddress *saddr; 37848bec07eSDaniel P. Berrange 379bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 38048bec07eSDaniel P. Berrange if (sockpath) { 381bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 382bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 38348bec07eSDaniel P. Berrange } else { 3840399293eSEric Blake InetSocketAddress *inet; 385bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 386bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3870399293eSEric Blake inet->host = g_strdup(bindto); 38848bec07eSDaniel P. Berrange if (port) { 3890399293eSEric Blake inet->port = g_strdup(port); 39048bec07eSDaniel P. Berrange } else { 3910399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39248bec07eSDaniel P. Berrange } 39348bec07eSDaniel P. Berrange } 39448bec07eSDaniel P. Berrange 39548bec07eSDaniel P. Berrange return saddr; 39648bec07eSDaniel P. Berrange } 39748bec07eSDaniel P. Berrange 39848bec07eSDaniel P. Berrange 39977c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40077c9aaefSDaniel P. Berrange .name = "file", 40177c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40277c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40377c9aaefSDaniel P. Berrange .desc = { 40477c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40577c9aaefSDaniel P. Berrange { /* end of list */ } 40677c9aaefSDaniel P. Berrange }, 40777c9aaefSDaniel P. Berrange }; 40877c9aaefSDaniel P. Berrange 4090ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4100ab3b337SDaniel P. Berrange .name = "object", 4110ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4120ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4130ab3b337SDaniel P. Berrange .desc = { 4140ab3b337SDaniel P. Berrange { } 4150ab3b337SDaniel P. Berrange }, 4160ab3b337SDaniel P. Berrange }; 4170ab3b337SDaniel P. Berrange 418495bf893SKevin Wolf static bool qemu_nbd_object_print_help(const char *type, QemuOpts *opts) 419495bf893SKevin Wolf { 420495bf893SKevin Wolf if (user_creatable_print_help(type, opts)) { 421495bf893SKevin Wolf exit(0); 422495bf893SKevin Wolf } 423495bf893SKevin Wolf return true; 424495bf893SKevin Wolf } 4250ab3b337SDaniel P. Berrange 426145614a1SDaniel P. Berrange 42768b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 42868b96f15SEric Blake Error **errp) 429145614a1SDaniel P. Berrange { 430145614a1SDaniel P. Berrange Object *obj; 431145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 432145614a1SDaniel P. Berrange 433145614a1SDaniel P. Berrange obj = object_resolve_path_component( 434145614a1SDaniel P. Berrange object_get_objects_root(), id); 435145614a1SDaniel P. Berrange if (!obj) { 436145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 437145614a1SDaniel P. Berrange id); 438145614a1SDaniel P. Berrange return NULL; 439145614a1SDaniel P. Berrange } 440145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 441145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 442145614a1SDaniel P. Berrange if (!creds) { 443145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 444145614a1SDaniel P. Berrange id); 445145614a1SDaniel P. Berrange return NULL; 446145614a1SDaniel P. Berrange } 447145614a1SDaniel P. Berrange 44868b96f15SEric Blake if (list) { 44968b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 45068b96f15SEric Blake error_setg(errp, 45168b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 45268b96f15SEric Blake return NULL; 45368b96f15SEric Blake } 45468b96f15SEric Blake } else { 455145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 456145614a1SDaniel P. Berrange error_setg(errp, 457145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 458145614a1SDaniel P. Berrange return NULL; 459145614a1SDaniel P. Berrange } 46068b96f15SEric Blake } 461145614a1SDaniel P. Berrange object_ref(obj); 462145614a1SDaniel P. Berrange return creds; 463145614a1SDaniel P. Berrange } 464145614a1SDaniel P. Berrange 465a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 466a721f53bSRichard W.M. Jones { 467a721f53bSRichard W.M. Jones if (*address == NULL) { 468a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 469a721f53bSRichard W.M. Jones } 470a721f53bSRichard W.M. Jones 471a721f53bSRichard W.M. Jones if (*port == NULL) { 472a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 473a721f53bSRichard W.M. Jones } 474a721f53bSRichard W.M. Jones } 475a721f53bSRichard W.M. Jones 476a721f53bSRichard W.M. Jones /* 477a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 478a721f53bSRichard W.M. Jones */ 479a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 480a721f53bSRichard W.M. Jones const char *sockpath, 481a721f53bSRichard W.M. Jones const char *address, 48268b96f15SEric Blake const char *port, 48368b96f15SEric Blake bool list) 484a721f53bSRichard W.M. Jones { 485a721f53bSRichard W.M. Jones if (device != NULL) { 486a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 487a721f53bSRichard W.M. Jones } 488a721f53bSRichard W.M. Jones 489a721f53bSRichard W.M. Jones if (sockpath != NULL) { 490a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 491a721f53bSRichard W.M. Jones } 492a721f53bSRichard W.M. Jones 493a721f53bSRichard W.M. Jones if (address != NULL) { 494a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 495a721f53bSRichard W.M. Jones } 496a721f53bSRichard W.M. Jones 497a721f53bSRichard W.M. Jones if (port != NULL) { 498a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 499a721f53bSRichard W.M. Jones } 500a721f53bSRichard W.M. Jones 50168b96f15SEric Blake if (list) { 50268b96f15SEric Blake return "List mode is incompatible with socket activation"; 50368b96f15SEric Blake } 50468b96f15SEric Blake 505a721f53bSRichard W.M. Jones return NULL; 506a721f53bSRichard W.M. Jones } 507145614a1SDaniel P. Berrange 508b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 509b3b5299dSKevin Wolf { 510b3b5299dSKevin Wolf job_cancel_sync_all(); 511b3b5299dSKevin Wolf bdrv_close_all(); 512b3b5299dSKevin Wolf } 513b3b5299dSKevin Wolf 5147a5ca864Sbellard int main(int argc, char **argv) 5157a5ca864Sbellard { 51626f54e9aSMarkus Armbruster BlockBackend *blk; 5177a5ca864Sbellard BlockDriverState *bs; 5189d26dfcbSEric Blake uint64_t dev_offset = 0; 519dbb38caaSEric Blake bool readonly = false; 520cd831bd7Sths bool disconnect = false; 521a721f53bSRichard W.M. Jones const char *bindto = NULL; 52248bec07eSDaniel P. Berrange const char *port = NULL; 52348bec07eSDaniel P. Berrange char *sockpath = NULL; 524a6ac2313SPaolo Bonzini char *device = NULL; 5258c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5268c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 5270bc16997SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:B:L"; 5287a5ca864Sbellard struct option lopt[] = { 529aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 530aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 531aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 532aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 533aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 534aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 535aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 536636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 537aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 538aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 53968b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 540aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 541aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 542aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 543aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 544aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 545aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 546aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 547aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 548aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 549aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 550aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 551aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 552aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 553aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 554b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 555aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 556b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 557aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 55839ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 559ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 560637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 561660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5627a5ca864Sbellard }; 5637a5ca864Sbellard int ch; 5647a5ca864Sbellard int opt_ind = 0; 565f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5664fbec260SMax Reitz int ret = 0; 56739a5235cSPaolo Bonzini bool seen_cache = false; 568ded9d2d5SPaolo Bonzini bool seen_discard = false; 56939a5235cSPaolo Bonzini bool seen_aio = false; 570a517e88bSPaolo Bonzini pthread_t client_thread; 571e6b63677SDaniel P. Berrange const char *fmt = NULL; 57234b5d2c6SMax Reitz Error *local_err = NULL; 573b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5744fbec260SMax Reitz QDict *options = NULL; 57568b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 576b1a75b33SEric Blake const char *export_description = NULL; 577*cbad81ceSEric Blake strList *bitmaps = NULL; 578145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 57977c9aaefSDaniel P. Berrange bool imageOpts = false; 5806effd5bfSKevin Wolf bool writethrough = true; 58139ca463eSDenis V. Lunev char *trace_file = NULL; 582ffb31e1dSMax Reitz bool fork_process = false; 58368b96f15SEric Blake bool list = false; 584ffb31e1dSMax Reitz int old_stderr = -1; 585a721f53bSRichard W.M. Jones unsigned socket_activation; 586637bc5a5SMax Reitz const char *pid_file_name = NULL; 58700917172SKevin Wolf BlockExportOptions *export_opts; 5887a5ca864Sbellard 589029a88c9SEric Blake #ifdef CONFIG_POSIX 590cbc20bfbSStefan Hajnoczi os_setup_early_signal_handling(); 591cbc20bfbSStefan Hajnoczi os_setup_signal_handling(); 592041e32b8SMax Reitz #endif 593041e32b8SMax Reitz 59498c5d2e7SDaniel P. Berrangé socket_init(); 595f5852efaSChristophe Fergeau error_init(argv[0]); 596fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 597e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 598c2297088SDaniel P. Berrange 5990ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 6000ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 60139ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 60210f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 603bb345110SPaolo Bonzini 6047a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6057a5ca864Sbellard switch (ch) { 6067a5ca864Sbellard case 's': 6072f726488Sths flags |= BDRV_O_SNAPSHOT; 6082f726488Sths break; 6092f726488Sths case 'n': 61039a5235cSPaolo Bonzini optarg = (char *) "none"; 61139a5235cSPaolo Bonzini /* fallthrough */ 61239a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 61339a5235cSPaolo Bonzini if (seen_cache) { 61485b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 61585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61639a5235cSPaolo Bonzini } 61739a5235cSPaolo Bonzini seen_cache = true; 6186effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 61985b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 62085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62139a5235cSPaolo Bonzini } 6227a5ca864Sbellard break; 62339a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 62439a5235cSPaolo Bonzini if (seen_aio) { 62585b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 62685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62739a5235cSPaolo Bonzini } 62839a5235cSPaolo Bonzini seen_aio = true; 6297680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6307680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 63185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63239a5235cSPaolo Bonzini } 63339a5235cSPaolo Bonzini break; 634ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 635ded9d2d5SPaolo Bonzini if (seen_discard) { 63685b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 63785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 638ded9d2d5SPaolo Bonzini } 639ded9d2d5SPaolo Bonzini seen_discard = true; 640ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 64185b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 64285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 643ded9d2d5SPaolo Bonzini } 644ded9d2d5SPaolo Bonzini break; 645b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 646b3838a40SPeter Lieven detect_zeroes = 647f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 648b3838a40SPeter Lieven optarg, 649b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 650b3838a40SPeter Lieven &local_err); 651b3838a40SPeter Lieven if (local_err) { 652c29b77f9SMarkus Armbruster error_reportf_err(local_err, 653c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 65485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 655b3838a40SPeter Lieven } 656b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 657b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 65885b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 659b3838a40SPeter Lieven "without setting discard operation to unmap"); 66085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 661b3838a40SPeter Lieven } 662b3838a40SPeter Lieven break; 6637a5ca864Sbellard case 'b': 6647a5ca864Sbellard bindto = optarg; 6657a5ca864Sbellard break; 6667a5ca864Sbellard case 'p': 66748bec07eSDaniel P. Berrange port = optarg; 6687a5ca864Sbellard break; 6697a5ca864Sbellard case 'o': 67043b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 67143b51011SEric Blake error_report("Invalid offset '%s'", optarg); 67285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6737a5ca864Sbellard } 6747a5ca864Sbellard break; 6758c116b0eSWenchao Xia case 'l': 6768c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 67770b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 67870b94331SMarkus Armbruster optarg, false); 6798c116b0eSWenchao Xia if (!sn_opts) { 68085b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6818c116b0eSWenchao Xia optarg); 68285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6838c116b0eSWenchao Xia } 6848c116b0eSWenchao Xia } else { 6858c116b0eSWenchao Xia sn_id_or_name = optarg; 6868c116b0eSWenchao Xia } 6878c116b0eSWenchao Xia /* fall through */ 6887a5ca864Sbellard case 'r': 689dbb38caaSEric Blake readonly = true; 69007108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6917a5ca864Sbellard break; 692636192c4SEric Blake case 'B': 693*cbad81ceSEric Blake QAPI_LIST_PREPEND(bitmaps, g_strdup(optarg)); 694636192c4SEric Blake break; 695cd831bd7Sths case 'k': 696b32f6c28SPaolo Bonzini sockpath = optarg; 697713cc671SPeter Lieven if (sockpath[0] != '/') { 6989af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 69985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 700713cc671SPeter Lieven } 701cd831bd7Sths break; 702cd831bd7Sths case 'd': 703cd831bd7Sths disconnect = true; 704cd831bd7Sths break; 705cd831bd7Sths case 'c': 706cd831bd7Sths device = optarg; 707cd831bd7Sths break; 7083b05a8e9Sths case 'e': 70943b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 71043b51011SEric Blake shared < 1) { 71185b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 71285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7133b05a8e9Sths } 7143b05a8e9Sths break; 715e6b63677SDaniel P. Berrange case 'f': 716e6b63677SDaniel P. Berrange fmt = optarg; 717e6b63677SDaniel P. Berrange break; 71875818250Sths case 't': 71975818250Sths persistent = 1; 72075818250Sths break; 7213d4b2f9cSDaniel P. Berrange case 'x': 7223d4b2f9cSDaniel P. Berrange export_name = optarg; 72393676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 72493676c88SEric Blake error_report("export name '%s' too long", export_name); 72593676c88SEric Blake exit(EXIT_FAILURE); 72693676c88SEric Blake } 7273d4b2f9cSDaniel P. Berrange break; 728b1a75b33SEric Blake case 'D': 729b1a75b33SEric Blake export_description = optarg; 73093676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 73193676c88SEric Blake error_report("export description '%s' too long", 73293676c88SEric Blake export_description); 73393676c88SEric Blake exit(EXIT_FAILURE); 73493676c88SEric Blake } 735b1a75b33SEric Blake break; 7367a5ca864Sbellard case 'v': 7377a5ca864Sbellard verbose = 1; 7387a5ca864Sbellard break; 7397a5ca864Sbellard case 'V': 7407a5ca864Sbellard version(argv[0]); 7417a5ca864Sbellard exit(0); 7427a5ca864Sbellard break; 7437a5ca864Sbellard case 'h': 7447a5ca864Sbellard usage(argv[0]); 7457a5ca864Sbellard exit(0); 7467a5ca864Sbellard break; 7477a5ca864Sbellard case '?': 74885b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 74985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7500ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7510ab3b337SDaniel P. Berrange QemuOpts *opts; 7520ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7530ab3b337SDaniel P. Berrange optarg, true); 7540ab3b337SDaniel P. Berrange if (!opts) { 7550ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7560ab3b337SDaniel P. Berrange } 7570ab3b337SDaniel P. Berrange } break; 758145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 759145614a1SDaniel P. Berrange tlscredsid = optarg; 760145614a1SDaniel P. Berrange break; 76177c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76277c9aaefSDaniel P. Berrange imageOpts = true; 76377c9aaefSDaniel P. Berrange break; 76439ca463eSDenis V. Lunev case 'T': 76539ca463eSDenis V. Lunev g_free(trace_file); 76639ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 76739ca463eSDenis V. Lunev break; 768b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 769b25e12daSDaniel P. Berrange tlsauthz = optarg; 770b25e12daSDaniel P. Berrange break; 771ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 772ffb31e1dSMax Reitz fork_process = true; 773ffb31e1dSMax Reitz break; 77468b96f15SEric Blake case 'L': 77568b96f15SEric Blake list = true; 77668b96f15SEric Blake break; 777637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 778637bc5a5SMax Reitz pid_file_name = optarg; 779637bc5a5SMax Reitz break; 7807a5ca864Sbellard } 7817a5ca864Sbellard } 7827a5ca864Sbellard 78368b96f15SEric Blake if (list) { 78468b96f15SEric Blake if (argc != optind) { 78568b96f15SEric Blake error_report("List mode is incompatible with a file name"); 78668b96f15SEric Blake exit(EXIT_FAILURE); 78768b96f15SEric Blake } 7880bc16997SEric Blake if (export_name || export_description || dev_offset || 789*cbad81ceSEric Blake device || disconnect || fmt || sn_id_or_name || bitmaps || 79068b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 79168b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 79268b96f15SEric Blake exit(EXIT_FAILURE); 79368b96f15SEric Blake } 79468b96f15SEric Blake if (fork_process) { 79568b96f15SEric Blake error_report("List mode is incompatible with forking"); 79668b96f15SEric Blake exit(EXIT_FAILURE); 79768b96f15SEric Blake } 79868b96f15SEric Blake } else if ((argc - optind) != 1) { 799433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 800433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 80185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 80268b96f15SEric Blake } else if (!export_name) { 80368b96f15SEric Blake export_name = ""; 8047a5ca864Sbellard } 8057a5ca864Sbellard 8067e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 8070ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 808495bf893SKevin Wolf qemu_nbd_object_print_help, &error_fatal); 8090ab3b337SDaniel P. Berrange 81039ca463eSDenis V. Lunev if (!trace_init_backends()) { 81139ca463eSDenis V. Lunev exit(1); 81239ca463eSDenis V. Lunev } 81339ca463eSDenis V. Lunev trace_init_file(trace_file); 81439ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 81539ca463eSDenis V. Lunev 816a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 817a721f53bSRichard W.M. Jones if (socket_activation == 0) { 818a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 819a721f53bSRichard W.M. Jones } else { 820a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 821a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 82268b96f15SEric Blake bindto, port, 82368b96f15SEric Blake list); 824a721f53bSRichard W.M. Jones if (err_msg != NULL) { 825a721f53bSRichard W.M. Jones error_report("%s", err_msg); 826a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 827a721f53bSRichard W.M. Jones } 82853fabd4bSPaolo Bonzini 82953fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 83053fabd4bSPaolo Bonzini if (socket_activation > 1) { 83153fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 83253fabd4bSPaolo Bonzini "LISTEN_FDS"); 83353fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 83453fabd4bSPaolo Bonzini } 835a721f53bSRichard W.M. Jones } 836a721f53bSRichard W.M. Jones 837145614a1SDaniel P. Berrange if (tlscredsid) { 838145614a1SDaniel P. Berrange if (sockpath) { 839145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 840145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 841145614a1SDaniel P. Berrange } 842145614a1SDaniel P. Berrange if (device) { 843145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 844145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 845145614a1SDaniel P. Berrange } 846b25e12daSDaniel P. Berrange if (tlsauthz && list) { 847b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 848b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 849b25e12daSDaniel P. Berrange } 85068b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 851145614a1SDaniel P. Berrange if (local_err) { 8525217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 853145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 854145614a1SDaniel P. Berrange } 855b25e12daSDaniel P. Berrange } else { 856b25e12daSDaniel P. Berrange if (tlsauthz) { 857b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 858b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 859b25e12daSDaniel P. Berrange } 860145614a1SDaniel P. Berrange } 861145614a1SDaniel P. Berrange 86268b96f15SEric Blake if (list) { 86368b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 86468b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 86568b96f15SEric Blake } 86668b96f15SEric Blake 8673c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8683c1fa35dSEric Blake if (disconnect || device) { 8693c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8703c1fa35dSEric Blake exit(EXIT_FAILURE); 8713c1fa35dSEric Blake } 8723c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 873cd831bd7Sths if (disconnect) { 874d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 875d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 87685b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 87785b01e09SMarkus Armbruster strerror(errno)); 87885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 879fc19f8a0SPaolo Bonzini } 880d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 881cd831bd7Sths 882d0d6ff58SDaniel P. Berrange close(nbdfd); 883cd831bd7Sths 884cd831bd7Sths printf("%s disconnected\n", argv[optind]); 885cd831bd7Sths 886cd831bd7Sths return 0; 887cd831bd7Sths } 8883c1fa35dSEric Blake #endif 889cd831bd7Sths 890ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 891eb705985SDaniel P. Berrangé #ifndef WIN32 892c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 893c1f8fdc3SPaolo Bonzini pid_t pid; 894c1f8fdc3SPaolo Bonzini int ret; 895c1f8fdc3SPaolo Bonzini 896fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 89785b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 89885b01e09SMarkus Armbruster strerror(errno)); 89985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 900c1f8fdc3SPaolo Bonzini } 901c1f8fdc3SPaolo Bonzini 902c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 903c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 904c1f8fdc3SPaolo Bonzini */ 905c1f8fdc3SPaolo Bonzini pid = fork(); 90670d4739eSMax Reitz if (pid < 0) { 90785b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 90885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 90970d4739eSMax Reitz } else if (pid == 0) { 910c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 911e6df58a5SMax Reitz 9120eaf453eSRaphael Pour /* Remember parent's stderr if we will be restoring it. */ 9130eaf453eSRaphael Pour if (fork_process) { 914e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 9150eaf453eSRaphael Pour } 9160eaf453eSRaphael Pour 9179faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 918c1f8fdc3SPaolo Bonzini 919c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 920c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 921fc19f8a0SPaolo Bonzini if (ret < 0) { 92285b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 92385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 924c1f8fdc3SPaolo Bonzini } 925c1f8fdc3SPaolo Bonzini 926c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 927c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 928c1f8fdc3SPaolo Bonzini } else { 929c1f8fdc3SPaolo Bonzini bool errors = false; 930c1f8fdc3SPaolo Bonzini char *buf; 931c1f8fdc3SPaolo Bonzini 932c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 933c1f8fdc3SPaolo Bonzini * it closes the pipe. 934c1f8fdc3SPaolo Bonzini */ 935c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 936c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 937c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 938c1f8fdc3SPaolo Bonzini errors = true; 939c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 940fc19f8a0SPaolo Bonzini if (ret < 0) { 941c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 942c1f8fdc3SPaolo Bonzini } 943c1f8fdc3SPaolo Bonzini } 944fc19f8a0SPaolo Bonzini if (ret < 0) { 94585b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 94685b01e09SMarkus Armbruster strerror(errno)); 94785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 948c1f8fdc3SPaolo Bonzini } 949c1f8fdc3SPaolo Bonzini 950c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 951c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 952c1f8fdc3SPaolo Bonzini */ 953c1f8fdc3SPaolo Bonzini exit(errors); 954c1f8fdc3SPaolo Bonzini } 955eb705985SDaniel P. Berrangé #else /* WIN32 */ 956eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 957eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 958eb705985SDaniel P. Berrangé #endif /* WIN32 */ 959c1f8fdc3SPaolo Bonzini } 960c1f8fdc3SPaolo Bonzini 961a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 962b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 963b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 964cd831bd7Sths } 965cd831bd7Sths 966e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 967a721f53bSRichard W.M. Jones if (socket_activation == 0) { 96848bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 969fc8135c6SJuan Quintela if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { 970e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 971a721f53bSRichard W.M. Jones error_report_err(local_err); 972e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 973a721f53bSRichard W.M. Jones } 974a721f53bSRichard W.M. Jones } else { 975e4849c1dSDaniel P. Berrange size_t i; 976a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 977e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 978e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 979e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 980a721f53bSRichard W.M. Jones &local_err); 981e4849c1dSDaniel P. Berrange if (sioc == NULL) { 982e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 9835217f188SMarkus Armbruster error_reportf_err(local_err, 9845217f188SMarkus Armbruster "Failed to use socket activation: "); 985a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 986a721f53bSRichard W.M. Jones } 987e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 988e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 989e4849c1dSDaniel P. Berrange } 990a721f53bSRichard W.M. Jones } 99148bec07eSDaniel P. Berrange 9922f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 993565f65d2SMarkus Armbruster error_report_err(local_err); 9942f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9952f78e491SChrysostomos Nanakos } 996802ddc37SPaolo Bonzini bdrv_init(); 997b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 998802ddc37SPaolo Bonzini 99977c9aaefSDaniel P. Berrange srcpath = argv[optind]; 100077c9aaefSDaniel P. Berrange if (imageOpts) { 100177c9aaefSDaniel P. Berrange QemuOpts *opts; 100277c9aaefSDaniel P. Berrange if (fmt) { 100377c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 100477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 100577c9aaefSDaniel P. Berrange } 100677c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 100777c9aaefSDaniel P. Berrange if (!opts) { 100877c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 100977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 101077c9aaefSDaniel P. Berrange } 101177c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 101277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1013efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 101477c9aaefSDaniel P. Berrange } else { 1015e6b63677SDaniel P. Berrange if (fmt) { 10164fbec260SMax Reitz options = qdict_new(); 101746f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1018e6b63677SDaniel P. Berrange } 1019efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 102077c9aaefSDaniel P. Berrange } 102177c9aaefSDaniel P. Berrange 10224fbec260SMax Reitz if (!blk) { 1023c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1024c29b77f9SMarkus Armbruster argv[optind]); 102585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1026802ddc37SPaolo Bonzini } 10274fbec260SMax Reitz bs = blk_bs(blk); 1028802ddc37SPaolo Bonzini 1029b57e4de0SKevin Wolf if (dev_offset) { 1030b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1031b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1032b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1033b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1034b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1035b57e4de0SKevin Wolf blk_remove_bs(blk); 1036b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1037b57e4de0SKevin Wolf bdrv_unref(bs); 1038b57e4de0SKevin Wolf } 1039b57e4de0SKevin Wolf 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; 1057802ddc37SPaolo Bonzini 105800917172SKevin Wolf nbd_server_is_qemu_nbd(true); 105900917172SKevin Wolf 106000917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 106100917172SKevin Wolf *export_opts = (BlockExportOptions) { 106200917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1063d53be9ceSKevin Wolf .id = g_strdup("qemu-nbd-export"), 1064b6076afcSKevin Wolf .node_name = g_strdup(bdrv_get_node_name(bs)), 106500917172SKevin Wolf .has_writethrough = true, 106600917172SKevin Wolf .writethrough = writethrough, 106730dbc81dSKevin Wolf .has_writable = true, 106830dbc81dSKevin Wolf .writable = !readonly, 106900917172SKevin Wolf .u.nbd = { 107000917172SKevin Wolf .has_name = true, 107100917172SKevin Wolf .name = g_strdup(export_name), 107200917172SKevin Wolf .has_description = !!export_description, 107300917172SKevin Wolf .description = g_strdup(export_description), 1074*cbad81ceSEric Blake .has_bitmaps = !!bitmaps, 1075*cbad81ceSEric Blake .bitmaps = bitmaps, 107600917172SKevin Wolf }, 107700917172SKevin Wolf }; 107800917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 107900917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 10803b05a8e9Sths 1081f1ef5555SPaolo Bonzini if (device) { 10823c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1083f1ef5555SPaolo Bonzini int ret; 1084f1ef5555SPaolo Bonzini 1085a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1086f1ef5555SPaolo Bonzini if (ret != 0) { 108785b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 108885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1089f1ef5555SPaolo Bonzini } 10903c1fa35dSEric Blake #endif 1091f1ef5555SPaolo Bonzini } else { 1092f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1093f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1094f1ef5555SPaolo Bonzini } 1095f1ef5555SPaolo Bonzini 1096d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10977a5ca864Sbellard 1098637bc5a5SMax Reitz if (pid_file_name) { 1099637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1100637bc5a5SMax Reitz } 1101637bc5a5SMax Reitz 11029faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11039faf31b6SMichael Tokarev * to free any busy filesystems */ 11049faf31b6SMichael Tokarev if (chdir("/") < 0) { 110585b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 110685b01e09SMarkus Armbruster strerror(errno)); 110785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11089faf31b6SMichael Tokarev } 11099faf31b6SMichael Tokarev 1110ffb31e1dSMax Reitz if (fork_process) { 1111ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1112ffb31e1dSMax Reitz close(old_stderr); 1113ffb31e1dSMax Reitz } 1114ffb31e1dSMax Reitz 11157860a380SPaolo Bonzini state = RUNNING; 11163b05a8e9Sths do { 1117a61c6782SPaolo Bonzini main_loop_wait(false); 11187860a380SPaolo Bonzini if (state == TERMINATE) { 1119bc4ee65bSKevin Wolf blk_exp_close_all(); 1120d794f7f3SKevin Wolf state = TERMINATED; 11217860a380SPaolo Bonzini } 11227860a380SPaolo Bonzini } while (state != TERMINATED); 11232c8d9f06SPaolo Bonzini 112426f54e9aSMarkus Armbruster blk_unref(blk); 1125b32f6c28SPaolo Bonzini if (sockpath) { 1126b32f6c28SPaolo Bonzini unlink(sockpath); 1127b32f6c28SPaolo Bonzini } 11287a5ca864Sbellard 11298c116b0eSWenchao Xia qemu_opts_del(sn_opts); 11308c116b0eSWenchao Xia 1131a517e88bSPaolo Bonzini if (device) { 1132a517e88bSPaolo Bonzini void *ret; 1133a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1134a517e88bSPaolo Bonzini exit(ret != NULL); 1135a517e88bSPaolo Bonzini } else { 1136a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1137a517e88bSPaolo Bonzini } 11387a5ca864Sbellard } 1139