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 68b1d8e52eSblueswir1 static int verbose; 69a517e88bSPaolo Bonzini static char *srcpath; 70bd269ebcSMarkus Armbruster static SocketAddress *saddr; 717860a380SPaolo Bonzini static int persistent = 0; 72d794f7f3SKevin Wolf static enum { RUNNING, TERMINATE, TERMINATED } state; 73a61c6782SPaolo Bonzini static int shared = 1; 74a61c6782SPaolo Bonzini static int nb_fds; 75e4849c1dSDaniel P. Berrange static QIONetListener *server; 76145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 77b25e12daSDaniel P. Berrange static const char *tlsauthz; 787a5ca864Sbellard 797a5ca864Sbellard static void usage(const char *name) 807a5ca864Sbellard { 81b033cd86SPaolo Bonzini (printf) ( 827a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8368b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8468b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 857a5ca864Sbellard "\n" 867a5ca864Sbellard " -h, --help display this help and exit\n" 877a5ca864Sbellard " -V, --version output version information and exit\n" 887a5ca864Sbellard "\n" 89b033cd86SPaolo Bonzini "Connection properties:\n" 90b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 91b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 92b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 93b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 94b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 95b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 96b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 97f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 98f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 99b033cd86SPaolo Bonzini "\n" 100b033cd86SPaolo Bonzini "Exposing part of the image:\n" 101b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 102636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 103b033cd86SPaolo Bonzini "\n" 1040ab3b337SDaniel P. Berrange "General purpose options:\n" 10568b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1060ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1070ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 108f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 109b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 110b25e12daSDaniel P. Berrange " authorization\n" 11139ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11239ca463eSDenis V. Lunev " specify tracing options\n" 113ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 114ffb31e1dSMax Reitz " once the server is running\n" 115637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1163c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1173c1fa35dSEric Blake "\n" 118b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 119b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 120b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 121b033cd86SPaolo Bonzini #endif 122b033cd86SPaolo Bonzini "\n" 123b033cd86SPaolo Bonzini "Block device options:\n" 1244323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 125b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1268c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1278c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1288c116b0eSWenchao Xia " the temporary one\n" 1298c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1308c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1318c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1328c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1338c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 134b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 13539a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 1367680274dSAarushi Mehta " --aio=MODE set AIO mode (native, io_uring or threads)\n" 137b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1386883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 13977c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 140b033cd86SPaolo Bonzini "\n" 141f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 14268b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1437a5ca864Sbellard } 1447a5ca864Sbellard 1457a5ca864Sbellard static void version(const char *name) 1467a5ca864Sbellard { 1477a5ca864Sbellard printf( 1487e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1497a5ca864Sbellard "Written by Anthony Liguori.\n" 1507a5ca864Sbellard "\n" 151be377133SEric Blake QEMU_COPYRIGHT "\n" 1527a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1537a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 154315bc7aaSths , name); 1557a5ca864Sbellard } 1567a5ca864Sbellard 1576e64dd57SDaniel P. Berrangé #if HAVE_NBD_DEVICE 158bb345110SPaolo Bonzini static void termsig_handler(int signum) 159bb345110SPaolo Bonzini { 160d73415a3SStefan Hajnoczi qatomic_cmpxchg(&state, RUNNING, TERMINATE); 161a61c6782SPaolo Bonzini qemu_notify_event(); 162bb345110SPaolo Bonzini } 1636e64dd57SDaniel P. Berrangé #endif /* HAVE_NBD_DEVICE */ 164537b41f5SPaolo Bonzini 16568b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 16668b96f15SEric Blake const char *hostname) 16768b96f15SEric Blake { 16868b96f15SEric Blake int ret = EXIT_FAILURE; 16968b96f15SEric Blake int rc; 17068b96f15SEric Blake Error *err = NULL; 17168b96f15SEric Blake QIOChannelSocket *sioc; 17268b96f15SEric Blake NBDExportInfo *list; 17368b96f15SEric Blake int i, j; 17468b96f15SEric Blake 17568b96f15SEric Blake sioc = qio_channel_socket_new(); 17668b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 17768b96f15SEric Blake error_report_err(err); 17868b96f15SEric Blake return EXIT_FAILURE; 17968b96f15SEric Blake } 18068b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 18168b96f15SEric Blake &err); 18268b96f15SEric Blake if (rc < 0) { 18368b96f15SEric Blake if (err) { 18468b96f15SEric Blake error_report_err(err); 18568b96f15SEric Blake } 18668b96f15SEric Blake goto out; 18768b96f15SEric Blake } 18868b96f15SEric Blake printf("exports available: %d\n", rc); 18968b96f15SEric Blake for (i = 0; i < rc; i++) { 19068b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 19168b96f15SEric Blake if (list[i].description && *list[i].description) { 19268b96f15SEric Blake printf(" description: %s\n", list[i].description); 19368b96f15SEric Blake } 19468b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 195c4e2aff8SMax Reitz static const char *const flag_names[] = { 196c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 197c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 198c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 199c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 200c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 201c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 202c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 203c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 204c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 205c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2060a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 207c4e2aff8SMax Reitz }; 208c4e2aff8SMax Reitz 20968b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 21068b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 211c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 212c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 213c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 21468b96f15SEric Blake } 21568b96f15SEric Blake } 21668b96f15SEric Blake printf(" )\n"); 21768b96f15SEric Blake } 21868b96f15SEric Blake if (list[i].min_block) { 21968b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 22068b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 22168b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 22268b96f15SEric Blake } 22368b96f15SEric Blake if (list[i].n_contexts) { 22468b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 22568b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 22668b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 22768b96f15SEric Blake } 22868b96f15SEric Blake } 22968b96f15SEric Blake } 23068b96f15SEric Blake nbd_free_export_list(list, rc); 23168b96f15SEric Blake 23268b96f15SEric Blake ret = EXIT_SUCCESS; 23368b96f15SEric Blake out: 23468b96f15SEric Blake object_unref(OBJECT(sioc)); 23568b96f15SEric Blake return ret; 23668b96f15SEric Blake } 23768b96f15SEric Blake 23868b96f15SEric Blake 2393c1fa35dSEric Blake #if HAVE_NBD_DEVICE 240a517e88bSPaolo Bonzini static void *show_parts(void *arg) 241cd831bd7Sths { 242a6ac2313SPaolo Bonzini char *device = arg; 243cd831bd7Sths int nbd; 244cd831bd7Sths 245cd831bd7Sths /* linux just needs an open() to trigger 246cd831bd7Sths * the partition table update 247cd831bd7Sths * but remember to load the module with max_part != 0 : 248cd831bd7Sths * modprobe nbd max_part=63 249cd831bd7Sths */ 250cd831bd7Sths nbd = open(device, O_RDWR); 251fc19f8a0SPaolo Bonzini if (nbd >= 0) { 252cd831bd7Sths close(nbd); 253cd831bd7Sths } 254a517e88bSPaolo Bonzini return NULL; 255a517e88bSPaolo Bonzini } 256a517e88bSPaolo Bonzini 257a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 258a517e88bSPaolo Bonzini { 259a6ac2313SPaolo Bonzini char *device = arg; 2606dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 261d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 262d0d6ff58SDaniel P. Berrange int fd; 263a517e88bSPaolo Bonzini int ret; 264a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2651ce52846SMax Reitz Error *local_error = NULL; 266a517e88bSPaolo Bonzini 267d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 268d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 269d0d6ff58SDaniel P. Berrange saddr, 270d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27148bec07eSDaniel P. Berrange error_report_err(local_error); 272a517e88bSPaolo Bonzini goto out; 273a517e88bSPaolo Bonzini } 274a517e88bSPaolo Bonzini 275a8e2bb6aSVladimir Sementsov-Ogievskiy ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 276004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 277fc19f8a0SPaolo Bonzini if (ret < 0) { 2781ce52846SMax Reitz if (local_error) { 27978288671SMarkus Armbruster error_report_err(local_error); 2801ce52846SMax Reitz } 2810c544d73SPaolo Bonzini goto out_socket; 282a517e88bSPaolo Bonzini } 283a517e88bSPaolo Bonzini 284a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 285fc19f8a0SPaolo Bonzini if (fd < 0) { 286a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 287b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2880c544d73SPaolo Bonzini goto out_socket; 289a6ac2313SPaolo Bonzini } 290a6ac2313SPaolo Bonzini 291004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 292fc19f8a0SPaolo Bonzini if (ret < 0) { 293be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 2940c544d73SPaolo Bonzini goto out_fd; 295a517e88bSPaolo Bonzini } 296a517e88bSPaolo Bonzini 297a517e88bSPaolo Bonzini /* update partition table */ 298a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 299a517e88bSPaolo Bonzini 300c1f8fdc3SPaolo Bonzini if (verbose) { 301a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 302a517e88bSPaolo Bonzini device, srcpath); 303c1f8fdc3SPaolo Bonzini } else { 304c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 305c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 306c1f8fdc3SPaolo Bonzini } 307a517e88bSPaolo Bonzini 308a517e88bSPaolo Bonzini ret = nbd_client(fd); 309a517e88bSPaolo Bonzini if (ret) { 3100c544d73SPaolo Bonzini goto out_fd; 311a517e88bSPaolo Bonzini } 312a517e88bSPaolo Bonzini close(fd); 313d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 3146dc1667dSEric Blake g_free(info.name); 315a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 316a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 317a517e88bSPaolo Bonzini 3180c544d73SPaolo Bonzini out_fd: 3190c544d73SPaolo Bonzini close(fd); 3200c544d73SPaolo Bonzini out_socket: 321d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 322a517e88bSPaolo Bonzini out: 3236dc1667dSEric Blake g_free(info.name); 324a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 325a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 326cd831bd7Sths } 3273c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 328cd831bd7Sths 329e4afbf4fSFam Zheng static int nbd_can_accept(void) 330a61c6782SPaolo Bonzini { 331df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 332a61c6782SPaolo Bonzini } 333a61c6782SPaolo Bonzini 334d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 335e4afbf4fSFam Zheng 3360c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 337a61c6782SPaolo Bonzini { 338a61c6782SPaolo Bonzini nb_fds--; 3390c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3407860a380SPaolo Bonzini state = TERMINATE; 3417860a380SPaolo Bonzini } 342d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3437860a380SPaolo Bonzini nbd_client_put(client); 344a61c6782SPaolo Bonzini } 345a61c6782SPaolo Bonzini 346e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 347e4849c1dSDaniel P. Berrange gpointer opaque) 348a61c6782SPaolo Bonzini { 3497860a380SPaolo Bonzini if (state >= TERMINATE) { 350e4849c1dSDaniel P. Berrange return; 3517860a380SPaolo Bonzini } 3527860a380SPaolo Bonzini 353a61c6782SPaolo Bonzini nb_fds++; 354d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 355b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 356d0d6ff58SDaniel P. Berrange } 357d0d6ff58SDaniel P. Berrange 358d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 359e4afbf4fSFam Zheng { 360e4afbf4fSFam Zheng if (nbd_can_accept()) { 361e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 362e4afbf4fSFam Zheng } else { 363e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 364e4afbf4fSFam Zheng } 365e4afbf4fSFam Zheng } 366e4afbf4fSFam Zheng 36748bec07eSDaniel P. Berrange 368bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 36948bec07eSDaniel P. Berrange const char *bindto, 37048bec07eSDaniel P. Berrange const char *port) 37148bec07eSDaniel P. Berrange { 372bd269ebcSMarkus Armbruster SocketAddress *saddr; 37348bec07eSDaniel P. Berrange 374bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 37548bec07eSDaniel P. Berrange if (sockpath) { 376bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 377bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 37848bec07eSDaniel P. Berrange } else { 3790399293eSEric Blake InetSocketAddress *inet; 380bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 381bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3820399293eSEric Blake inet->host = g_strdup(bindto); 38348bec07eSDaniel P. Berrange if (port) { 3840399293eSEric Blake inet->port = g_strdup(port); 38548bec07eSDaniel P. Berrange } else { 3860399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 38748bec07eSDaniel P. Berrange } 38848bec07eSDaniel P. Berrange } 38948bec07eSDaniel P. Berrange 39048bec07eSDaniel P. Berrange return saddr; 39148bec07eSDaniel P. Berrange } 39248bec07eSDaniel P. Berrange 39348bec07eSDaniel P. Berrange 39477c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 39577c9aaefSDaniel P. Berrange .name = "file", 39677c9aaefSDaniel P. Berrange .implied_opt_name = "file", 39777c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 39877c9aaefSDaniel P. Berrange .desc = { 39977c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40077c9aaefSDaniel P. Berrange { /* end of list */ } 40177c9aaefSDaniel P. Berrange }, 40277c9aaefSDaniel P. Berrange }; 40377c9aaefSDaniel P. Berrange 4040ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4050ab3b337SDaniel P. Berrange .name = "object", 4060ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4070ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4080ab3b337SDaniel P. Berrange .desc = { 4090ab3b337SDaniel P. Berrange { } 4100ab3b337SDaniel P. Berrange }, 4110ab3b337SDaniel P. Berrange }; 4120ab3b337SDaniel P. Berrange 413495bf893SKevin Wolf static bool qemu_nbd_object_print_help(const char *type, QemuOpts *opts) 414495bf893SKevin Wolf { 415495bf893SKevin Wolf if (user_creatable_print_help(type, opts)) { 416495bf893SKevin Wolf exit(0); 417495bf893SKevin Wolf } 418495bf893SKevin Wolf return true; 419495bf893SKevin Wolf } 4200ab3b337SDaniel P. Berrange 421145614a1SDaniel P. Berrange 42268b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 42368b96f15SEric Blake Error **errp) 424145614a1SDaniel P. Berrange { 425145614a1SDaniel P. Berrange Object *obj; 426145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 427145614a1SDaniel P. Berrange 428145614a1SDaniel P. Berrange obj = object_resolve_path_component( 429145614a1SDaniel P. Berrange object_get_objects_root(), id); 430145614a1SDaniel P. Berrange if (!obj) { 431145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 432145614a1SDaniel P. Berrange id); 433145614a1SDaniel P. Berrange return NULL; 434145614a1SDaniel P. Berrange } 435145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 436145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 437145614a1SDaniel P. Berrange if (!creds) { 438145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 439145614a1SDaniel P. Berrange id); 440145614a1SDaniel P. Berrange return NULL; 441145614a1SDaniel P. Berrange } 442145614a1SDaniel P. Berrange 44368b96f15SEric Blake if (list) { 44468b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 44568b96f15SEric Blake error_setg(errp, 44668b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 44768b96f15SEric Blake return NULL; 44868b96f15SEric Blake } 44968b96f15SEric Blake } else { 450145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 451145614a1SDaniel P. Berrange error_setg(errp, 452145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 453145614a1SDaniel P. Berrange return NULL; 454145614a1SDaniel P. Berrange } 45568b96f15SEric Blake } 456145614a1SDaniel P. Berrange object_ref(obj); 457145614a1SDaniel P. Berrange return creds; 458145614a1SDaniel P. Berrange } 459145614a1SDaniel P. Berrange 460a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 461a721f53bSRichard W.M. Jones { 462a721f53bSRichard W.M. Jones if (*address == NULL) { 463a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 464a721f53bSRichard W.M. Jones } 465a721f53bSRichard W.M. Jones 466a721f53bSRichard W.M. Jones if (*port == NULL) { 467a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 468a721f53bSRichard W.M. Jones } 469a721f53bSRichard W.M. Jones } 470a721f53bSRichard W.M. Jones 471a721f53bSRichard W.M. Jones /* 472a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 473a721f53bSRichard W.M. Jones */ 474a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 475a721f53bSRichard W.M. Jones const char *sockpath, 476a721f53bSRichard W.M. Jones const char *address, 47768b96f15SEric Blake const char *port, 47868b96f15SEric Blake bool list) 479a721f53bSRichard W.M. Jones { 480a721f53bSRichard W.M. Jones if (device != NULL) { 481a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 482a721f53bSRichard W.M. Jones } 483a721f53bSRichard W.M. Jones 484a721f53bSRichard W.M. Jones if (sockpath != NULL) { 485a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 486a721f53bSRichard W.M. Jones } 487a721f53bSRichard W.M. Jones 488a721f53bSRichard W.M. Jones if (address != NULL) { 489a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 490a721f53bSRichard W.M. Jones } 491a721f53bSRichard W.M. Jones 492a721f53bSRichard W.M. Jones if (port != NULL) { 493a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 494a721f53bSRichard W.M. Jones } 495a721f53bSRichard W.M. Jones 49668b96f15SEric Blake if (list) { 49768b96f15SEric Blake return "List mode is incompatible with socket activation"; 49868b96f15SEric Blake } 49968b96f15SEric Blake 500a721f53bSRichard W.M. Jones return NULL; 501a721f53bSRichard W.M. Jones } 502145614a1SDaniel P. Berrange 503b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 504b3b5299dSKevin Wolf { 505b3b5299dSKevin Wolf job_cancel_sync_all(); 506b3b5299dSKevin Wolf bdrv_close_all(); 507b3b5299dSKevin Wolf } 508b3b5299dSKevin Wolf 5097a5ca864Sbellard int main(int argc, char **argv) 5107a5ca864Sbellard { 51126f54e9aSMarkus Armbruster BlockBackend *blk; 5127a5ca864Sbellard BlockDriverState *bs; 5139d26dfcbSEric Blake uint64_t dev_offset = 0; 514dbb38caaSEric Blake bool readonly = false; 515cd831bd7Sths bool disconnect = false; 516a721f53bSRichard W.M. Jones const char *bindto = NULL; 51748bec07eSDaniel P. Berrange const char *port = NULL; 51848bec07eSDaniel P. Berrange char *sockpath = NULL; 519a6ac2313SPaolo Bonzini char *device = NULL; 5208c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5218c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 5220bc16997SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:B:L"; 5237a5ca864Sbellard struct option lopt[] = { 524aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 525aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 526aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 527aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 528aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 529aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 530aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 531636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 532aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 533aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 53468b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 535aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 536aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 537aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 538aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 539aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 540aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 541aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 542aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 543aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 544aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 545aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 546aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 547aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 548aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 549b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 550aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 551b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 552aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 55339ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 554ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 555637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 556660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5577a5ca864Sbellard }; 5587a5ca864Sbellard int ch; 5597a5ca864Sbellard int opt_ind = 0; 560f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5614fbec260SMax Reitz int ret = 0; 56239a5235cSPaolo Bonzini bool seen_cache = false; 563ded9d2d5SPaolo Bonzini bool seen_discard = false; 56439a5235cSPaolo Bonzini bool seen_aio = false; 565a517e88bSPaolo Bonzini pthread_t client_thread; 566e6b63677SDaniel P. Berrange const char *fmt = NULL; 56734b5d2c6SMax Reitz Error *local_err = NULL; 568b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5694fbec260SMax Reitz QDict *options = NULL; 57068b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 571b1a75b33SEric Blake const char *export_description = NULL; 572636192c4SEric Blake const char *bitmap = NULL; 573145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 57477c9aaefSDaniel P. Berrange bool imageOpts = false; 5756effd5bfSKevin Wolf bool writethrough = true; 57639ca463eSDenis V. Lunev char *trace_file = NULL; 577ffb31e1dSMax Reitz bool fork_process = false; 57868b96f15SEric Blake bool list = false; 579ffb31e1dSMax Reitz int old_stderr = -1; 580a721f53bSRichard W.M. Jones unsigned socket_activation; 581637bc5a5SMax Reitz const char *pid_file_name = NULL; 582*00917172SKevin Wolf BlockExportOptions *export_opts; 5837a5ca864Sbellard 5846e64dd57SDaniel P. Berrangé #if HAVE_NBD_DEVICE 585a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 586a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 587a517e88bSPaolo Bonzini */ 588bb345110SPaolo Bonzini struct sigaction sa_sigterm; 589bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 590bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 591bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 5926e64dd57SDaniel P. Berrangé #endif /* HAVE_NBD_DEVICE */ 593c2297088SDaniel P. Berrange 594041e32b8SMax Reitz #ifdef CONFIG_POSIX 595041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 596041e32b8SMax Reitz #endif 597041e32b8SMax Reitz 59898c5d2e7SDaniel P. Berrangé socket_init(); 599f5852efaSChristophe Fergeau error_init(argv[0]); 600fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 601e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 602c2297088SDaniel P. Berrange 6030ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 6040ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 60539ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 60610f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 607bb345110SPaolo Bonzini 6087a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6097a5ca864Sbellard switch (ch) { 6107a5ca864Sbellard case 's': 6112f726488Sths flags |= BDRV_O_SNAPSHOT; 6122f726488Sths break; 6132f726488Sths case 'n': 61439a5235cSPaolo Bonzini optarg = (char *) "none"; 61539a5235cSPaolo Bonzini /* fallthrough */ 61639a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 61739a5235cSPaolo Bonzini if (seen_cache) { 61885b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 61985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62039a5235cSPaolo Bonzini } 62139a5235cSPaolo Bonzini seen_cache = true; 6226effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 62385b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 62485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62539a5235cSPaolo Bonzini } 6267a5ca864Sbellard break; 62739a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 62839a5235cSPaolo Bonzini if (seen_aio) { 62985b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 63085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63139a5235cSPaolo Bonzini } 63239a5235cSPaolo Bonzini seen_aio = true; 6337680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6347680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 63585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63639a5235cSPaolo Bonzini } 63739a5235cSPaolo Bonzini break; 638ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 639ded9d2d5SPaolo Bonzini if (seen_discard) { 64085b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 64185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 642ded9d2d5SPaolo Bonzini } 643ded9d2d5SPaolo Bonzini seen_discard = true; 644ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 64585b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 64685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 647ded9d2d5SPaolo Bonzini } 648ded9d2d5SPaolo Bonzini break; 649b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 650b3838a40SPeter Lieven detect_zeroes = 651f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 652b3838a40SPeter Lieven optarg, 653b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 654b3838a40SPeter Lieven &local_err); 655b3838a40SPeter Lieven if (local_err) { 656c29b77f9SMarkus Armbruster error_reportf_err(local_err, 657c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 65885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 659b3838a40SPeter Lieven } 660b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 661b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 66285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 663b3838a40SPeter Lieven "without setting discard operation to unmap"); 66485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 665b3838a40SPeter Lieven } 666b3838a40SPeter Lieven break; 6677a5ca864Sbellard case 'b': 6687a5ca864Sbellard bindto = optarg; 6697a5ca864Sbellard break; 6707a5ca864Sbellard case 'p': 67148bec07eSDaniel P. Berrange port = optarg; 6727a5ca864Sbellard break; 6737a5ca864Sbellard case 'o': 67443b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 67543b51011SEric Blake error_report("Invalid offset '%s'", optarg); 67685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6777a5ca864Sbellard } 6787a5ca864Sbellard break; 6798c116b0eSWenchao Xia case 'l': 6808c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 68170b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 68270b94331SMarkus Armbruster optarg, false); 6838c116b0eSWenchao Xia if (!sn_opts) { 68485b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6858c116b0eSWenchao Xia optarg); 68685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6878c116b0eSWenchao Xia } 6888c116b0eSWenchao Xia } else { 6898c116b0eSWenchao Xia sn_id_or_name = optarg; 6908c116b0eSWenchao Xia } 6918c116b0eSWenchao Xia /* fall through */ 6927a5ca864Sbellard case 'r': 693dbb38caaSEric Blake readonly = true; 69407108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6957a5ca864Sbellard break; 696636192c4SEric Blake case 'B': 697636192c4SEric Blake bitmap = optarg; 698636192c4SEric Blake break; 699cd831bd7Sths case 'k': 700b32f6c28SPaolo Bonzini sockpath = optarg; 701713cc671SPeter Lieven if (sockpath[0] != '/') { 7029af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 70385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 704713cc671SPeter Lieven } 705cd831bd7Sths break; 706cd831bd7Sths case 'd': 707cd831bd7Sths disconnect = true; 708cd831bd7Sths break; 709cd831bd7Sths case 'c': 710cd831bd7Sths device = optarg; 711cd831bd7Sths break; 7123b05a8e9Sths case 'e': 71343b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 71443b51011SEric Blake shared < 1) { 71585b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 71685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7173b05a8e9Sths } 7183b05a8e9Sths break; 719e6b63677SDaniel P. Berrange case 'f': 720e6b63677SDaniel P. Berrange fmt = optarg; 721e6b63677SDaniel P. Berrange break; 72275818250Sths case 't': 72375818250Sths persistent = 1; 72475818250Sths break; 7253d4b2f9cSDaniel P. Berrange case 'x': 7263d4b2f9cSDaniel P. Berrange export_name = optarg; 72793676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 72893676c88SEric Blake error_report("export name '%s' too long", export_name); 72993676c88SEric Blake exit(EXIT_FAILURE); 73093676c88SEric Blake } 7313d4b2f9cSDaniel P. Berrange break; 732b1a75b33SEric Blake case 'D': 733b1a75b33SEric Blake export_description = optarg; 73493676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 73593676c88SEric Blake error_report("export description '%s' too long", 73693676c88SEric Blake export_description); 73793676c88SEric Blake exit(EXIT_FAILURE); 73893676c88SEric Blake } 739b1a75b33SEric Blake break; 7407a5ca864Sbellard case 'v': 7417a5ca864Sbellard verbose = 1; 7427a5ca864Sbellard break; 7437a5ca864Sbellard case 'V': 7447a5ca864Sbellard version(argv[0]); 7457a5ca864Sbellard exit(0); 7467a5ca864Sbellard break; 7477a5ca864Sbellard case 'h': 7487a5ca864Sbellard usage(argv[0]); 7497a5ca864Sbellard exit(0); 7507a5ca864Sbellard break; 7517a5ca864Sbellard case '?': 75285b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 75385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7540ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7550ab3b337SDaniel P. Berrange QemuOpts *opts; 7560ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7570ab3b337SDaniel P. Berrange optarg, true); 7580ab3b337SDaniel P. Berrange if (!opts) { 7590ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7600ab3b337SDaniel P. Berrange } 7610ab3b337SDaniel P. Berrange } break; 762145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 763145614a1SDaniel P. Berrange tlscredsid = optarg; 764145614a1SDaniel P. Berrange break; 76577c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76677c9aaefSDaniel P. Berrange imageOpts = true; 76777c9aaefSDaniel P. Berrange break; 76839ca463eSDenis V. Lunev case 'T': 76939ca463eSDenis V. Lunev g_free(trace_file); 77039ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 77139ca463eSDenis V. Lunev break; 772b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 773b25e12daSDaniel P. Berrange tlsauthz = optarg; 774b25e12daSDaniel P. Berrange break; 775ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 776ffb31e1dSMax Reitz fork_process = true; 777ffb31e1dSMax Reitz break; 77868b96f15SEric Blake case 'L': 77968b96f15SEric Blake list = true; 78068b96f15SEric Blake break; 781637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 782637bc5a5SMax Reitz pid_file_name = optarg; 783637bc5a5SMax Reitz break; 7847a5ca864Sbellard } 7857a5ca864Sbellard } 7867a5ca864Sbellard 78768b96f15SEric Blake if (list) { 78868b96f15SEric Blake if (argc != optind) { 78968b96f15SEric Blake error_report("List mode is incompatible with a file name"); 79068b96f15SEric Blake exit(EXIT_FAILURE); 79168b96f15SEric Blake } 7920bc16997SEric Blake if (export_name || export_description || dev_offset || 79368b96f15SEric Blake device || disconnect || fmt || sn_id_or_name || bitmap || 79468b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 79568b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 79668b96f15SEric Blake exit(EXIT_FAILURE); 79768b96f15SEric Blake } 79868b96f15SEric Blake if (fork_process) { 79968b96f15SEric Blake error_report("List mode is incompatible with forking"); 80068b96f15SEric Blake exit(EXIT_FAILURE); 80168b96f15SEric Blake } 80268b96f15SEric Blake } else if ((argc - optind) != 1) { 803433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 804433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 80585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 80668b96f15SEric Blake } else if (!export_name) { 80768b96f15SEric Blake export_name = ""; 8087a5ca864Sbellard } 8097a5ca864Sbellard 8107e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 8110ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 812495bf893SKevin Wolf qemu_nbd_object_print_help, &error_fatal); 8130ab3b337SDaniel P. Berrange 81439ca463eSDenis V. Lunev if (!trace_init_backends()) { 81539ca463eSDenis V. Lunev exit(1); 81639ca463eSDenis V. Lunev } 81739ca463eSDenis V. Lunev trace_init_file(trace_file); 81839ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 81939ca463eSDenis V. Lunev 820a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 821a721f53bSRichard W.M. Jones if (socket_activation == 0) { 822a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 823a721f53bSRichard W.M. Jones } else { 824a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 825a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 82668b96f15SEric Blake bindto, port, 82768b96f15SEric Blake list); 828a721f53bSRichard W.M. Jones if (err_msg != NULL) { 829a721f53bSRichard W.M. Jones error_report("%s", err_msg); 830a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 831a721f53bSRichard W.M. Jones } 83253fabd4bSPaolo Bonzini 83353fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 83453fabd4bSPaolo Bonzini if (socket_activation > 1) { 83553fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 83653fabd4bSPaolo Bonzini "LISTEN_FDS"); 83753fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 83853fabd4bSPaolo Bonzini } 839a721f53bSRichard W.M. Jones } 840a721f53bSRichard W.M. Jones 841145614a1SDaniel P. Berrange if (tlscredsid) { 842145614a1SDaniel P. Berrange if (sockpath) { 843145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 844145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 845145614a1SDaniel P. Berrange } 846145614a1SDaniel P. Berrange if (device) { 847145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 848145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 849145614a1SDaniel P. Berrange } 850b25e12daSDaniel P. Berrange if (tlsauthz && list) { 851b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 852b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 853b25e12daSDaniel P. Berrange } 85468b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 855145614a1SDaniel P. Berrange if (local_err) { 8565217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 857145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 858145614a1SDaniel P. Berrange } 859b25e12daSDaniel P. Berrange } else { 860b25e12daSDaniel P. Berrange if (tlsauthz) { 861b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 862b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 863b25e12daSDaniel P. Berrange } 864145614a1SDaniel P. Berrange } 865145614a1SDaniel P. Berrange 86668b96f15SEric Blake if (list) { 86768b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 86868b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 86968b96f15SEric Blake } 87068b96f15SEric Blake 8713c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8723c1fa35dSEric Blake if (disconnect || device) { 8733c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8743c1fa35dSEric Blake exit(EXIT_FAILURE); 8753c1fa35dSEric Blake } 8763c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 877cd831bd7Sths if (disconnect) { 878d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 879d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 88085b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 88185b01e09SMarkus Armbruster strerror(errno)); 88285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 883fc19f8a0SPaolo Bonzini } 884d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 885cd831bd7Sths 886d0d6ff58SDaniel P. Berrange close(nbdfd); 887cd831bd7Sths 888cd831bd7Sths printf("%s disconnected\n", argv[optind]); 889cd831bd7Sths 890cd831bd7Sths return 0; 891cd831bd7Sths } 8923c1fa35dSEric Blake #endif 893cd831bd7Sths 894ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 895eb705985SDaniel P. Berrangé #ifndef WIN32 896c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 897c1f8fdc3SPaolo Bonzini pid_t pid; 898c1f8fdc3SPaolo Bonzini int ret; 899c1f8fdc3SPaolo Bonzini 900fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 90185b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 90285b01e09SMarkus Armbruster strerror(errno)); 90385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 904c1f8fdc3SPaolo Bonzini } 905c1f8fdc3SPaolo Bonzini 906c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 907c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 908c1f8fdc3SPaolo Bonzini */ 909c1f8fdc3SPaolo Bonzini pid = fork(); 91070d4739eSMax Reitz if (pid < 0) { 91185b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 91285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 91370d4739eSMax Reitz } else if (pid == 0) { 914c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 915e6df58a5SMax Reitz 9160eaf453eSRaphael Pour /* Remember parent's stderr if we will be restoring it. */ 9170eaf453eSRaphael Pour if (fork_process) { 918e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 9190eaf453eSRaphael Pour } 9200eaf453eSRaphael Pour 9219faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 922c1f8fdc3SPaolo Bonzini 923c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 924c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 925fc19f8a0SPaolo Bonzini if (ret < 0) { 92685b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 92785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 928c1f8fdc3SPaolo Bonzini } 929c1f8fdc3SPaolo Bonzini 930c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 931c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 932c1f8fdc3SPaolo Bonzini } else { 933c1f8fdc3SPaolo Bonzini bool errors = false; 934c1f8fdc3SPaolo Bonzini char *buf; 935c1f8fdc3SPaolo Bonzini 936c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 937c1f8fdc3SPaolo Bonzini * it closes the pipe. 938c1f8fdc3SPaolo Bonzini */ 939c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 940c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 941c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 942c1f8fdc3SPaolo Bonzini errors = true; 943c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 944fc19f8a0SPaolo Bonzini if (ret < 0) { 945c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 946c1f8fdc3SPaolo Bonzini } 947c1f8fdc3SPaolo Bonzini } 948fc19f8a0SPaolo Bonzini if (ret < 0) { 94985b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 95085b01e09SMarkus Armbruster strerror(errno)); 95185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 952c1f8fdc3SPaolo Bonzini } 953c1f8fdc3SPaolo Bonzini 954c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 955c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 956c1f8fdc3SPaolo Bonzini */ 957c1f8fdc3SPaolo Bonzini exit(errors); 958c1f8fdc3SPaolo Bonzini } 959eb705985SDaniel P. Berrangé #else /* WIN32 */ 960eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 961eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 962eb705985SDaniel P. Berrangé #endif /* WIN32 */ 963c1f8fdc3SPaolo Bonzini } 964c1f8fdc3SPaolo Bonzini 965a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 966b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 967b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 968cd831bd7Sths } 969cd831bd7Sths 970e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 971a721f53bSRichard W.M. Jones if (socket_activation == 0) { 97248bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 973fc8135c6SJuan Quintela if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { 974e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 975a721f53bSRichard W.M. Jones error_report_err(local_err); 976e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 977a721f53bSRichard W.M. Jones } 978a721f53bSRichard W.M. Jones } else { 979e4849c1dSDaniel P. Berrange size_t i; 980a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 981e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 982e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 983e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 984a721f53bSRichard W.M. Jones &local_err); 985e4849c1dSDaniel P. Berrange if (sioc == NULL) { 986e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 9875217f188SMarkus Armbruster error_reportf_err(local_err, 9885217f188SMarkus Armbruster "Failed to use socket activation: "); 989a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 990a721f53bSRichard W.M. Jones } 991e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 992e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 993e4849c1dSDaniel P. Berrange } 994a721f53bSRichard W.M. Jones } 99548bec07eSDaniel P. Berrange 9962f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 997565f65d2SMarkus Armbruster error_report_err(local_err); 9982f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9992f78e491SChrysostomos Nanakos } 1000802ddc37SPaolo Bonzini bdrv_init(); 1001b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1002802ddc37SPaolo Bonzini 100377c9aaefSDaniel P. Berrange srcpath = argv[optind]; 100477c9aaefSDaniel P. Berrange if (imageOpts) { 100577c9aaefSDaniel P. Berrange QemuOpts *opts; 100677c9aaefSDaniel P. Berrange if (fmt) { 100777c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 100877c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 100977c9aaefSDaniel P. Berrange } 101077c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 101177c9aaefSDaniel P. Berrange if (!opts) { 101277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 101377c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 101477c9aaefSDaniel P. Berrange } 101577c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 101677c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1017efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 101877c9aaefSDaniel P. Berrange } else { 1019e6b63677SDaniel P. Berrange if (fmt) { 10204fbec260SMax Reitz options = qdict_new(); 102146f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1022e6b63677SDaniel P. Berrange } 1023efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 102477c9aaefSDaniel P. Berrange } 102577c9aaefSDaniel P. Berrange 10264fbec260SMax Reitz if (!blk) { 1027c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1028c29b77f9SMarkus Armbruster argv[optind]); 102985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1030802ddc37SPaolo Bonzini } 10314fbec260SMax Reitz bs = blk_bs(blk); 1032802ddc37SPaolo Bonzini 1033b57e4de0SKevin Wolf if (dev_offset) { 1034b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1035b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1036b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1037b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1038b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1039b57e4de0SKevin Wolf blk_remove_bs(blk); 1040b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1041b57e4de0SKevin Wolf bdrv_unref(bs); 1042b57e4de0SKevin Wolf } 1043b57e4de0SKevin Wolf 10446effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 10456effd5bfSKevin Wolf 10468c116b0eSWenchao Xia if (sn_opts) { 10478c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 10488c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 10498c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 10508c116b0eSWenchao Xia &local_err); 10518c116b0eSWenchao Xia } else if (sn_id_or_name) { 10528c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 10538c116b0eSWenchao Xia &local_err); 10548c116b0eSWenchao Xia } 10558c116b0eSWenchao Xia if (ret < 0) { 1056c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 105785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10588c116b0eSWenchao Xia } 10598c116b0eSWenchao Xia 1060b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 1061802ddc37SPaolo Bonzini 1062*00917172SKevin Wolf nbd_server_is_qemu_nbd(true); 1063*00917172SKevin Wolf 1064*00917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 1065*00917172SKevin Wolf *export_opts = (BlockExportOptions) { 1066*00917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1067*00917172SKevin Wolf .has_writethrough = true, 1068*00917172SKevin Wolf .writethrough = writethrough, 1069*00917172SKevin Wolf .u.nbd = { 1070*00917172SKevin Wolf .device = g_strdup(bdrv_get_node_name(bs)), 1071*00917172SKevin Wolf .has_name = true, 1072*00917172SKevin Wolf .name = g_strdup(export_name), 1073*00917172SKevin Wolf .has_description = !!export_description, 1074*00917172SKevin Wolf .description = g_strdup(export_description), 1075*00917172SKevin Wolf .has_writable = true, 1076*00917172SKevin Wolf .writable = !readonly, 1077*00917172SKevin Wolf .has_bitmap = !!bitmap, 1078*00917172SKevin Wolf .bitmap = g_strdup(bitmap), 1079*00917172SKevin Wolf }, 1080*00917172SKevin Wolf }; 1081*00917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 1082*00917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 10833b05a8e9Sths 1084f1ef5555SPaolo Bonzini if (device) { 10853c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1086f1ef5555SPaolo Bonzini int ret; 1087f1ef5555SPaolo Bonzini 1088a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1089f1ef5555SPaolo Bonzini if (ret != 0) { 109085b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 109185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1092f1ef5555SPaolo Bonzini } 10933c1fa35dSEric Blake #endif 1094f1ef5555SPaolo Bonzini } else { 1095f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1096f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1097f1ef5555SPaolo Bonzini } 1098f1ef5555SPaolo Bonzini 1099d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11007a5ca864Sbellard 1101637bc5a5SMax Reitz if (pid_file_name) { 1102637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1103637bc5a5SMax Reitz } 1104637bc5a5SMax Reitz 11059faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11069faf31b6SMichael Tokarev * to free any busy filesystems */ 11079faf31b6SMichael Tokarev if (chdir("/") < 0) { 110885b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 110985b01e09SMarkus Armbruster strerror(errno)); 111085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11119faf31b6SMichael Tokarev } 11129faf31b6SMichael Tokarev 1113ffb31e1dSMax Reitz if (fork_process) { 1114ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1115ffb31e1dSMax Reitz close(old_stderr); 1116ffb31e1dSMax Reitz } 1117ffb31e1dSMax Reitz 11187860a380SPaolo Bonzini state = RUNNING; 11193b05a8e9Sths do { 1120a61c6782SPaolo Bonzini main_loop_wait(false); 11217860a380SPaolo Bonzini if (state == TERMINATE) { 1122d794f7f3SKevin Wolf nbd_export_close_all(); 1123d794f7f3SKevin Wolf state = TERMINATED; 11247860a380SPaolo Bonzini } 11257860a380SPaolo Bonzini } while (state != TERMINATED); 11262c8d9f06SPaolo Bonzini 112726f54e9aSMarkus Armbruster blk_unref(blk); 1128b32f6c28SPaolo Bonzini if (sockpath) { 1129b32f6c28SPaolo Bonzini unlink(sockpath); 1130b32f6c28SPaolo Bonzini } 11317a5ca864Sbellard 11328c116b0eSWenchao Xia qemu_opts_del(sn_opts); 11338c116b0eSWenchao Xia 1134a517e88bSPaolo Bonzini if (device) { 1135a517e88bSPaolo Bonzini void *ret; 1136a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1137a517e88bSPaolo Bonzini exit(ret != NULL); 1138a517e88bSPaolo Bonzini } else { 1139a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1140a517e88bSPaolo Bonzini } 11417a5ca864Sbellard } 1142