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 2449f95221SMarc-André Lureau #include "qemu/help-texts.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" 460279cd95SPhilippe Mathieu-Daudé #include "crypto/tlscreds.h" 4739ca463eSDenis V. Lunev #include "trace/control.h" 48be377133SEric Blake #include "qemu-version.h" 497a5ca864Sbellard 503d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 513d212b41SRichard W.M. Jones #include <selinux/selinux.h> 523d212b41SRichard W.M. Jones #endif 533d212b41SRichard W.M. Jones 543c1fa35dSEric Blake #ifdef __linux__ 553c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 563c1fa35dSEric Blake #else 573c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 583c1fa35dSEric Blake #endif 593c1fa35dSEric Blake 60cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 61fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 62fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 63fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 64fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 65fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 66fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 67fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 68ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 69b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 70637bc5a5SMax Reitz #define QEMU_NBD_OPT_PID_FILE 265 713d212b41SRichard W.M. Jones #define QEMU_NBD_OPT_SELINUX_LABEL 266 72003b2b25SDaniel P. Berrangé #define QEMU_NBD_OPT_TLSHOSTNAME 267 737a5ca864Sbellard 74bd31c214SEric Blake #define MBR_SIZE 512 75bd31c214SEric Blake 76b1d8e52eSblueswir1 static int verbose; 77a517e88bSPaolo Bonzini static char *srcpath; 78bd269ebcSMarkus Armbruster static SocketAddress *saddr; 797860a380SPaolo Bonzini static int persistent = 0; 80d794f7f3SKevin Wolf static enum { RUNNING, TERMINATE, TERMINATED } state; 81a61c6782SPaolo Bonzini static int shared = 1; 82a61c6782SPaolo Bonzini static int nb_fds; 83e4849c1dSDaniel P. Berrange static QIONetListener *server; 84145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 85b25e12daSDaniel P. Berrange static const char *tlsauthz; 867a5ca864Sbellard 877a5ca864Sbellard static void usage(const char *name) 887a5ca864Sbellard { 89b033cd86SPaolo Bonzini (printf) ( 907a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 9168b96f15SEric Blake " or: %s -L [OPTIONS]\n" 9268b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 937a5ca864Sbellard "\n" 947a5ca864Sbellard " -h, --help display this help and exit\n" 957a5ca864Sbellard " -V, --version output version information and exit\n" 967a5ca864Sbellard "\n" 97b033cd86SPaolo Bonzini "Connection properties:\n" 98b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 99b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 100b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 101b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 102b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 103b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 104b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 105f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 106f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 107b033cd86SPaolo Bonzini "\n" 108b033cd86SPaolo Bonzini "Exposing part of the image:\n" 109b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 110dbc7b014SEric Blake " -A, --allocation-depth expose the allocation depth\n" 111636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 112b033cd86SPaolo Bonzini "\n" 1130ab3b337SDaniel P. Berrange "General purpose options:\n" 11468b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1150ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1160ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 117f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 118b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 119b25e12daSDaniel P. Berrange " authorization\n" 12039ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 12139ca463eSDenis V. Lunev " specify tracing options\n" 122ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 123ffb31e1dSMax Reitz " once the server is running\n" 124637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1253d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 1263d212b41SRichard W.M. Jones " --selinux-label=LABEL set SELinux process label on listening socket\n" 1273d212b41SRichard W.M. Jones #endif 1283c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1293c1fa35dSEric Blake "\n" 130b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 131b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 132b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 133b033cd86SPaolo Bonzini #endif 134b033cd86SPaolo Bonzini "\n" 135b033cd86SPaolo Bonzini "Block device options:\n" 1364323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 137b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1388c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1398c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1408c116b0eSWenchao Xia " the temporary one\n" 1418c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1428c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1438c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1448c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1458c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 146b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 14709615257SNir Soffer " --cache=MODE set cache mode used to access the disk image, the\n" 14809615257SNir Soffer " valid options are: 'none', 'writeback' (default),\n" 14909615257SNir Soffer " 'writethrough', 'directsync' and 'unsafe'\n" 1507680274dSAarushi Mehta " --aio=MODE set AIO mode (native, io_uring or threads)\n" 151b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1526883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 15377c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 154b033cd86SPaolo Bonzini "\n" 155f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 15668b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1577a5ca864Sbellard } 1587a5ca864Sbellard 1597a5ca864Sbellard static void version(const char *name) 1607a5ca864Sbellard { 1617a5ca864Sbellard printf( 1627e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1637a5ca864Sbellard "Written by Anthony Liguori.\n" 1647a5ca864Sbellard "\n" 165be377133SEric Blake QEMU_COPYRIGHT "\n" 1667a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1677a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 168315bc7aaSths , name); 1697a5ca864Sbellard } 1707a5ca864Sbellard 171029a88c9SEric Blake #ifdef CONFIG_POSIX 172cbc20bfbSStefan Hajnoczi /* 173cbc20bfbSStefan Hajnoczi * The client thread uses SIGTERM to interrupt the server. A signal 174cbc20bfbSStefan Hajnoczi * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 175cbc20bfbSStefan Hajnoczi */ 176cbc20bfbSStefan Hajnoczi void qemu_system_killed(int signum, pid_t pid) 177bb345110SPaolo Bonzini { 178d73415a3SStefan Hajnoczi qatomic_cmpxchg(&state, RUNNING, TERMINATE); 179a61c6782SPaolo Bonzini qemu_notify_event(); 180bb345110SPaolo Bonzini } 181029a88c9SEric Blake #endif /* CONFIG_POSIX */ 182537b41f5SPaolo Bonzini 18368b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 18468b96f15SEric Blake const char *hostname) 18568b96f15SEric Blake { 18668b96f15SEric Blake int ret = EXIT_FAILURE; 18768b96f15SEric Blake int rc; 18868b96f15SEric Blake Error *err = NULL; 18968b96f15SEric Blake QIOChannelSocket *sioc; 19068b96f15SEric Blake NBDExportInfo *list; 19168b96f15SEric Blake int i, j; 19268b96f15SEric Blake 19368b96f15SEric Blake sioc = qio_channel_socket_new(); 19468b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 19568b96f15SEric Blake error_report_err(err); 196992809bfSAlex Chen goto out; 19768b96f15SEric Blake } 19868b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 19968b96f15SEric Blake &err); 20068b96f15SEric Blake if (rc < 0) { 20168b96f15SEric Blake if (err) { 20268b96f15SEric Blake error_report_err(err); 20368b96f15SEric Blake } 20468b96f15SEric Blake goto out; 20568b96f15SEric Blake } 20668b96f15SEric Blake printf("exports available: %d\n", rc); 20768b96f15SEric Blake for (i = 0; i < rc; i++) { 20868b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 20968b96f15SEric Blake if (list[i].description && *list[i].description) { 21068b96f15SEric Blake printf(" description: %s\n", list[i].description); 21168b96f15SEric Blake } 21268b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 213c4e2aff8SMax Reitz static const char *const flag_names[] = { 214c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 215c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 216c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 217c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 218c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 219c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 220c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 221c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 222c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 223c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2240a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 225c4e2aff8SMax Reitz }; 226c4e2aff8SMax Reitz 22768b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 22868b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 229c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 230c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 231c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 23268b96f15SEric Blake } 23368b96f15SEric Blake } 23468b96f15SEric Blake printf(" )\n"); 23568b96f15SEric Blake } 23668b96f15SEric Blake if (list[i].min_block) { 23768b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 23868b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 23968b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 24068b96f15SEric Blake } 24168b96f15SEric Blake if (list[i].n_contexts) { 24268b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 24368b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 24468b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 24568b96f15SEric Blake } 24668b96f15SEric Blake } 24768b96f15SEric Blake } 24868b96f15SEric Blake nbd_free_export_list(list, rc); 24968b96f15SEric Blake 25068b96f15SEric Blake ret = EXIT_SUCCESS; 25168b96f15SEric Blake out: 25268b96f15SEric Blake object_unref(OBJECT(sioc)); 25368b96f15SEric Blake return ret; 25468b96f15SEric Blake } 25568b96f15SEric Blake 25668b96f15SEric Blake 2573c1fa35dSEric Blake #if HAVE_NBD_DEVICE 258a517e88bSPaolo Bonzini static void *show_parts(void *arg) 259cd831bd7Sths { 260a6ac2313SPaolo Bonzini char *device = arg; 261cd831bd7Sths int nbd; 262cd831bd7Sths 263cd831bd7Sths /* linux just needs an open() to trigger 264cd831bd7Sths * the partition table update 265cd831bd7Sths * but remember to load the module with max_part != 0 : 266cd831bd7Sths * modprobe nbd max_part=63 267cd831bd7Sths */ 268cd831bd7Sths nbd = open(device, O_RDWR); 269fc19f8a0SPaolo Bonzini if (nbd >= 0) { 270cd831bd7Sths close(nbd); 271cd831bd7Sths } 272a517e88bSPaolo Bonzini return NULL; 273a517e88bSPaolo Bonzini } 274a517e88bSPaolo Bonzini 275a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 276a517e88bSPaolo Bonzini { 277a6ac2313SPaolo Bonzini char *device = arg; 2786dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 279d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 280af74b550SAlex Chen int fd = -1; 281af74b550SAlex Chen int ret = EXIT_FAILURE; 282a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2831ce52846SMax Reitz Error *local_error = NULL; 284a517e88bSPaolo Bonzini 285d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 286d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 287d0d6ff58SDaniel P. Berrange saddr, 288d0d6ff58SDaniel P. Berrange &local_error) < 0) { 28948bec07eSDaniel P. Berrange error_report_err(local_error); 290a517e88bSPaolo Bonzini goto out; 291a517e88bSPaolo Bonzini } 292a517e88bSPaolo Bonzini 293af74b550SAlex Chen if (nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 294af74b550SAlex Chen NULL, NULL, NULL, &info, &local_error) < 0) { 2951ce52846SMax Reitz if (local_error) { 29678288671SMarkus Armbruster error_report_err(local_error); 2971ce52846SMax Reitz } 298af74b550SAlex Chen goto out; 299a517e88bSPaolo Bonzini } 300a517e88bSPaolo Bonzini 301a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 302fc19f8a0SPaolo Bonzini if (fd < 0) { 303a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 304b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 305af74b550SAlex Chen goto out; 306a6ac2313SPaolo Bonzini } 307a6ac2313SPaolo Bonzini 308af74b550SAlex Chen if (nbd_init(fd, sioc, &info, &local_error) < 0) { 309be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 310af74b550SAlex Chen goto out; 311a517e88bSPaolo Bonzini } 312a517e88bSPaolo Bonzini 313a517e88bSPaolo Bonzini /* update partition table */ 314a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 315a517e88bSPaolo Bonzini 316c1f8fdc3SPaolo Bonzini if (verbose) { 317a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 318a517e88bSPaolo Bonzini device, srcpath); 319c1f8fdc3SPaolo Bonzini } else { 320c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 321c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 322c1f8fdc3SPaolo Bonzini } 323a517e88bSPaolo Bonzini 324af74b550SAlex Chen if (nbd_client(fd) < 0) { 325af74b550SAlex Chen goto out; 326a517e88bSPaolo Bonzini } 327a517e88bSPaolo Bonzini 328af74b550SAlex Chen ret = EXIT_SUCCESS; 329af74b550SAlex Chen 330a517e88bSPaolo Bonzini out: 331af74b550SAlex Chen if (fd >= 0) { 332af74b550SAlex Chen close(fd); 333af74b550SAlex Chen } 334af74b550SAlex Chen object_unref(OBJECT(sioc)); 3356dc1667dSEric Blake g_free(info.name); 336a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 337af74b550SAlex Chen return (void *) (intptr_t) ret; 338cd831bd7Sths } 3393c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 340cd831bd7Sths 341e4afbf4fSFam Zheng static int nbd_can_accept(void) 342a61c6782SPaolo Bonzini { 3433dcf56e6SEric Blake return state == RUNNING && (shared == 0 || nb_fds < shared); 344a61c6782SPaolo Bonzini } 345a61c6782SPaolo Bonzini 346d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 347e4afbf4fSFam Zheng 3480c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 349a61c6782SPaolo Bonzini { 350a61c6782SPaolo Bonzini nb_fds--; 3510c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3527860a380SPaolo Bonzini state = TERMINATE; 3537860a380SPaolo Bonzini } 354d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3557860a380SPaolo Bonzini nbd_client_put(client); 356a61c6782SPaolo Bonzini } 357a61c6782SPaolo Bonzini 358e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 359e4849c1dSDaniel P. Berrange gpointer opaque) 360a61c6782SPaolo Bonzini { 3617860a380SPaolo Bonzini if (state >= TERMINATE) { 362e4849c1dSDaniel P. Berrange return; 3637860a380SPaolo Bonzini } 3647860a380SPaolo Bonzini 365a61c6782SPaolo Bonzini nb_fds++; 366d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 367b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 368d0d6ff58SDaniel P. Berrange } 369d0d6ff58SDaniel P. Berrange 370d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 371e4afbf4fSFam Zheng { 372e4afbf4fSFam Zheng if (nbd_can_accept()) { 373e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 374e4afbf4fSFam Zheng } else { 375e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 376e4afbf4fSFam Zheng } 377e4afbf4fSFam Zheng } 378e4afbf4fSFam Zheng 37948bec07eSDaniel P. Berrange 380bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 38148bec07eSDaniel P. Berrange const char *bindto, 38248bec07eSDaniel P. Berrange const char *port) 38348bec07eSDaniel P. Berrange { 384bd269ebcSMarkus Armbruster SocketAddress *saddr; 38548bec07eSDaniel P. Berrange 386bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 38748bec07eSDaniel P. Berrange if (sockpath) { 388bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 389bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 39048bec07eSDaniel P. Berrange } else { 3910399293eSEric Blake InetSocketAddress *inet; 392bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 393bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3940399293eSEric Blake inet->host = g_strdup(bindto); 39548bec07eSDaniel P. Berrange if (port) { 3960399293eSEric Blake inet->port = g_strdup(port); 39748bec07eSDaniel P. Berrange } else { 3980399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39948bec07eSDaniel P. Berrange } 40048bec07eSDaniel P. Berrange } 40148bec07eSDaniel P. Berrange 40248bec07eSDaniel P. Berrange return saddr; 40348bec07eSDaniel P. Berrange } 40448bec07eSDaniel P. Berrange 40548bec07eSDaniel P. Berrange 40677c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40777c9aaefSDaniel P. Berrange .name = "file", 40877c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40977c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 41077c9aaefSDaniel P. Berrange .desc = { 41177c9aaefSDaniel P. Berrange /* no elements => accept any params */ 41277c9aaefSDaniel P. Berrange { /* end of list */ } 41377c9aaefSDaniel P. Berrange }, 41477c9aaefSDaniel P. Berrange }; 41577c9aaefSDaniel P. Berrange 41668b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 41768b96f15SEric Blake Error **errp) 418145614a1SDaniel P. Berrange { 419145614a1SDaniel P. Berrange Object *obj; 420145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 421145614a1SDaniel P. Berrange 422145614a1SDaniel P. Berrange obj = object_resolve_path_component( 423145614a1SDaniel P. Berrange object_get_objects_root(), id); 424145614a1SDaniel P. Berrange if (!obj) { 425145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 426145614a1SDaniel P. Berrange id); 427145614a1SDaniel P. Berrange return NULL; 428145614a1SDaniel P. Berrange } 429145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 430145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 431145614a1SDaniel P. Berrange if (!creds) { 432145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 433145614a1SDaniel P. Berrange id); 434145614a1SDaniel P. Berrange return NULL; 435145614a1SDaniel P. Berrange } 436145614a1SDaniel P. Berrange 4370279cd95SPhilippe Mathieu-Daudé if (!qcrypto_tls_creds_check_endpoint(creds, 4380279cd95SPhilippe Mathieu-Daudé list 4390279cd95SPhilippe Mathieu-Daudé ? QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT 4400279cd95SPhilippe Mathieu-Daudé : QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4410279cd95SPhilippe Mathieu-Daudé errp)) { 44268b96f15SEric Blake return NULL; 44368b96f15SEric Blake } 444145614a1SDaniel P. Berrange object_ref(obj); 445145614a1SDaniel P. Berrange return creds; 446145614a1SDaniel P. Berrange } 447145614a1SDaniel P. Berrange 448a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 449a721f53bSRichard W.M. Jones { 450a721f53bSRichard W.M. Jones if (*address == NULL) { 451a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 452a721f53bSRichard W.M. Jones } 453a721f53bSRichard W.M. Jones 454a721f53bSRichard W.M. Jones if (*port == NULL) { 455a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 456a721f53bSRichard W.M. Jones } 457a721f53bSRichard W.M. Jones } 458a721f53bSRichard W.M. Jones 459a721f53bSRichard W.M. Jones /* 460a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 461a721f53bSRichard W.M. Jones */ 462a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 463a721f53bSRichard W.M. Jones const char *sockpath, 464a721f53bSRichard W.M. Jones const char *address, 46568b96f15SEric Blake const char *port, 4663d212b41SRichard W.M. Jones const char *selinux, 46768b96f15SEric Blake bool list) 468a721f53bSRichard W.M. Jones { 469a721f53bSRichard W.M. Jones if (device != NULL) { 470a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 471a721f53bSRichard W.M. Jones } 472a721f53bSRichard W.M. Jones 473a721f53bSRichard W.M. Jones if (sockpath != NULL) { 474a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 475a721f53bSRichard W.M. Jones } 476a721f53bSRichard W.M. Jones 477a721f53bSRichard W.M. Jones if (address != NULL) { 478a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 479a721f53bSRichard W.M. Jones } 480a721f53bSRichard W.M. Jones 481a721f53bSRichard W.M. Jones if (port != NULL) { 482a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 483a721f53bSRichard W.M. Jones } 484a721f53bSRichard W.M. Jones 4853d212b41SRichard W.M. Jones if (selinux != NULL) { 4863d212b41SRichard W.M. Jones return "SELinux label can't be set when using socket activation"; 4873d212b41SRichard W.M. Jones } 4883d212b41SRichard W.M. Jones 48968b96f15SEric Blake if (list) { 49068b96f15SEric Blake return "List mode is incompatible with socket activation"; 49168b96f15SEric Blake } 49268b96f15SEric Blake 493a721f53bSRichard W.M. Jones return NULL; 494a721f53bSRichard W.M. Jones } 495145614a1SDaniel P. Berrange 496b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 497b3b5299dSKevin Wolf { 498b3b5299dSKevin Wolf job_cancel_sync_all(); 4991895b977SSergio Lopez blk_exp_close_all(); 500b3b5299dSKevin Wolf bdrv_close_all(); 501b3b5299dSKevin Wolf } 502b3b5299dSKevin Wolf 5037a5ca864Sbellard int main(int argc, char **argv) 5047a5ca864Sbellard { 50526f54e9aSMarkus Armbruster BlockBackend *blk; 5067a5ca864Sbellard BlockDriverState *bs; 5079d26dfcbSEric Blake uint64_t dev_offset = 0; 508dbb38caaSEric Blake bool readonly = false; 509cd831bd7Sths bool disconnect = false; 510a721f53bSRichard W.M. Jones const char *bindto = NULL; 51148bec07eSDaniel P. Berrange const char *port = NULL; 51248bec07eSDaniel P. Berrange char *sockpath = NULL; 513a6ac2313SPaolo Bonzini char *device = NULL; 5148c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5158c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 516dbc7b014SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:AB:L"; 5177a5ca864Sbellard struct option lopt[] = { 518aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 519aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 520aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 521aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 522aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 523aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 524aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 525dbc7b014SEric Blake { "allocation-depth", no_argument, NULL, 'A' }, 526636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 527aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 528aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 52968b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 530aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 531aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 532aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 533aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 534aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 535aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 536aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 537aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 538aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 539aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 540aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 541aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 542aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 543aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 544b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 545aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 546003b2b25SDaniel P. Berrangé { "tls-hostname", required_argument, NULL, QEMU_NBD_OPT_TLSHOSTNAME }, 547b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 548aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 54939ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 550ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 551637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 5523d212b41SRichard W.M. Jones { "selinux-label", required_argument, NULL, 5533d212b41SRichard W.M. Jones QEMU_NBD_OPT_SELINUX_LABEL }, 554660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5557a5ca864Sbellard }; 5567a5ca864Sbellard int ch; 5577a5ca864Sbellard int opt_ind = 0; 558f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5594fbec260SMax Reitz int ret = 0; 56039a5235cSPaolo Bonzini bool seen_cache = false; 561ded9d2d5SPaolo Bonzini bool seen_discard = false; 56239a5235cSPaolo Bonzini bool seen_aio = false; 563a517e88bSPaolo Bonzini pthread_t client_thread; 564e6b63677SDaniel P. Berrange const char *fmt = NULL; 56534b5d2c6SMax Reitz Error *local_err = NULL; 566b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5674fbec260SMax Reitz QDict *options = NULL; 56868b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 569b1a75b33SEric Blake const char *export_description = NULL; 570e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStrList *bitmaps = NULL; 571dbc7b014SEric Blake bool alloc_depth = false; 572145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 573003b2b25SDaniel P. Berrangé const char *tlshostname = NULL; 57477c9aaefSDaniel P. Berrange bool imageOpts = false; 57509615257SNir Soffer bool writethrough = false; /* Client will flush as needed. */ 576ffb31e1dSMax Reitz bool fork_process = false; 57768b96f15SEric Blake bool list = false; 578ffb31e1dSMax Reitz int old_stderr = -1; 579a721f53bSRichard W.M. Jones unsigned socket_activation; 580637bc5a5SMax Reitz const char *pid_file_name = NULL; 5813d212b41SRichard W.M. Jones const char *selinux_label = NULL; 58200917172SKevin Wolf BlockExportOptions *export_opts; 5837a5ca864Sbellard 584029a88c9SEric Blake #ifdef CONFIG_POSIX 585cbc20bfbSStefan Hajnoczi os_setup_early_signal_handling(); 586cbc20bfbSStefan Hajnoczi os_setup_signal_handling(); 587041e32b8SMax Reitz #endif 588041e32b8SMax Reitz 58998c5d2e7SDaniel P. Berrangé socket_init(); 590f5852efaSChristophe Fergeau error_init(argv[0]); 591fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 592e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 593c2297088SDaniel P. Berrange 5940ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 59539ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 59610f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 597bb345110SPaolo Bonzini 5987a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5997a5ca864Sbellard switch (ch) { 6007a5ca864Sbellard case 's': 6012f726488Sths flags |= BDRV_O_SNAPSHOT; 6022f726488Sths break; 6032f726488Sths case 'n': 60439a5235cSPaolo Bonzini optarg = (char *) "none"; 60539a5235cSPaolo Bonzini /* fallthrough */ 60639a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 60739a5235cSPaolo Bonzini if (seen_cache) { 60885b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 60985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61039a5235cSPaolo Bonzini } 61139a5235cSPaolo Bonzini seen_cache = true; 6126effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 61385b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 61485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61539a5235cSPaolo Bonzini } 6167a5ca864Sbellard break; 61739a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 61839a5235cSPaolo Bonzini if (seen_aio) { 61985b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 62085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62139a5235cSPaolo Bonzini } 62239a5235cSPaolo Bonzini seen_aio = true; 6237680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6247680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 62585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62639a5235cSPaolo Bonzini } 62739a5235cSPaolo Bonzini break; 628ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 629ded9d2d5SPaolo Bonzini if (seen_discard) { 63085b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 63185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 632ded9d2d5SPaolo Bonzini } 633ded9d2d5SPaolo Bonzini seen_discard = true; 634ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 63585b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 63685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 637ded9d2d5SPaolo Bonzini } 638ded9d2d5SPaolo Bonzini break; 639b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 640b3838a40SPeter Lieven detect_zeroes = 641f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 642b3838a40SPeter Lieven optarg, 643b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 644b3838a40SPeter Lieven &local_err); 645b3838a40SPeter Lieven if (local_err) { 646c29b77f9SMarkus Armbruster error_reportf_err(local_err, 647c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 64885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 649b3838a40SPeter Lieven } 650b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 651b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 65285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 653b3838a40SPeter Lieven "without setting discard operation to unmap"); 65485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 655b3838a40SPeter Lieven } 656b3838a40SPeter Lieven break; 6577a5ca864Sbellard case 'b': 6587a5ca864Sbellard bindto = optarg; 6597a5ca864Sbellard break; 6607a5ca864Sbellard case 'p': 66148bec07eSDaniel P. Berrange port = optarg; 6627a5ca864Sbellard break; 6637a5ca864Sbellard case 'o': 66443b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 66543b51011SEric Blake error_report("Invalid offset '%s'", optarg); 66685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6677a5ca864Sbellard } 6687a5ca864Sbellard break; 6698c116b0eSWenchao Xia case 'l': 6708c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 67170b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 67270b94331SMarkus Armbruster optarg, false); 6738c116b0eSWenchao Xia if (!sn_opts) { 67485b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6758c116b0eSWenchao Xia optarg); 67685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6778c116b0eSWenchao Xia } 6788c116b0eSWenchao Xia } else { 6798c116b0eSWenchao Xia sn_id_or_name = optarg; 6808c116b0eSWenchao Xia } 6818c116b0eSWenchao Xia /* fall through */ 6827a5ca864Sbellard case 'r': 683dbb38caaSEric Blake readonly = true; 68407108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6857a5ca864Sbellard break; 686dbc7b014SEric Blake case 'A': 687dbc7b014SEric Blake alloc_depth = true; 688dbc7b014SEric Blake break; 689636192c4SEric Blake case 'B': 690e5fb29d5SVladimir Sementsov-Ogievskiy { 691e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStr *el = g_new(BlockDirtyBitmapOrStr, 1); 692e5fb29d5SVladimir Sementsov-Ogievskiy *el = (BlockDirtyBitmapOrStr) { 693e5fb29d5SVladimir Sementsov-Ogievskiy .type = QTYPE_QSTRING, 694e5fb29d5SVladimir Sementsov-Ogievskiy .u.local = g_strdup(optarg), 695e5fb29d5SVladimir Sementsov-Ogievskiy }; 696e5fb29d5SVladimir Sementsov-Ogievskiy QAPI_LIST_PREPEND(bitmaps, el); 697e5fb29d5SVladimir Sementsov-Ogievskiy } 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 || 7143dcf56e6SEric Blake shared < 0) { 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); 754fa40e43cSKevin Wolf case QEMU_NBD_OPT_OBJECT: 755fa40e43cSKevin Wolf user_creatable_process_cmdline(optarg); 756fa40e43cSKevin Wolf break; 757145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 758145614a1SDaniel P. Berrange tlscredsid = optarg; 759145614a1SDaniel P. Berrange break; 760003b2b25SDaniel P. Berrangé case QEMU_NBD_OPT_TLSHOSTNAME: 761003b2b25SDaniel P. Berrangé tlshostname = optarg; 762003b2b25SDaniel P. Berrangé break; 76377c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76477c9aaefSDaniel P. Berrange imageOpts = true; 76577c9aaefSDaniel P. Berrange break; 76639ca463eSDenis V. Lunev case 'T': 76792eecfffSPaolo Bonzini trace_opt_parse(optarg); 76839ca463eSDenis V. Lunev break; 769b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 770b25e12daSDaniel P. Berrange tlsauthz = optarg; 771b25e12daSDaniel P. Berrange break; 772ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 773ffb31e1dSMax Reitz fork_process = true; 774ffb31e1dSMax Reitz break; 77568b96f15SEric Blake case 'L': 77668b96f15SEric Blake list = true; 77768b96f15SEric Blake break; 778637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 779637bc5a5SMax Reitz pid_file_name = optarg; 780637bc5a5SMax Reitz break; 7813d212b41SRichard W.M. Jones case QEMU_NBD_OPT_SELINUX_LABEL: 7823d212b41SRichard W.M. Jones selinux_label = optarg; 7833d212b41SRichard W.M. Jones 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 || 793cbad81ceSEric Blake device || disconnect || fmt || sn_id_or_name || bitmaps || 794dbc7b014SEric Blake alloc_depth || 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 81039ca463eSDenis V. Lunev if (!trace_init_backends()) { 81139ca463eSDenis V. Lunev exit(1); 81239ca463eSDenis V. Lunev } 81392eecfffSPaolo Bonzini trace_init_file(); 814c5955f4fSRichard Henderson qemu_set_log(LOG_TRACE, &error_fatal); 81539ca463eSDenis V. Lunev 816a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 817a721f53bSRichard W.M. Jones if (socket_activation == 0) { 818e8ae8b1aSDaniel P. Berrangé if (!sockpath) { 819a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 820e8ae8b1aSDaniel P. Berrangé } 821a721f53bSRichard W.M. Jones } else { 822a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 823a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 82468b96f15SEric Blake bindto, port, 8253d212b41SRichard W.M. Jones selinux_label, 82668b96f15SEric Blake list); 827a721f53bSRichard W.M. Jones if (err_msg != NULL) { 828a721f53bSRichard W.M. Jones error_report("%s", err_msg); 829a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 830a721f53bSRichard W.M. Jones } 83153fabd4bSPaolo Bonzini 83253fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 83353fabd4bSPaolo Bonzini if (socket_activation > 1) { 83453fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 83553fabd4bSPaolo Bonzini "LISTEN_FDS"); 83653fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 83753fabd4bSPaolo Bonzini } 838a721f53bSRichard W.M. Jones } 839a721f53bSRichard W.M. Jones 840145614a1SDaniel P. Berrange if (tlscredsid) { 841145614a1SDaniel P. Berrange if (device) { 842145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 843145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 844145614a1SDaniel P. Berrange } 845b25e12daSDaniel P. Berrange if (tlsauthz && list) { 846b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 847b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 848b25e12daSDaniel P. Berrange } 849003b2b25SDaniel P. Berrangé if (tlshostname && !list) { 850003b2b25SDaniel P. Berrangé error_report("TLS hostname is only supported with export list"); 851003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 852003b2b25SDaniel P. Berrangé } 85368b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 854145614a1SDaniel P. Berrange if (local_err) { 8555217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 856145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 857145614a1SDaniel P. Berrange } 858b25e12daSDaniel P. Berrange } else { 859b25e12daSDaniel P. Berrange if (tlsauthz) { 860b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 861b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 862b25e12daSDaniel P. Berrange } 863003b2b25SDaniel P. Berrangé if (tlshostname) { 864003b2b25SDaniel P. Berrangé error_report("--tls-hostname is not permitted without --tls-creds"); 865003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 866003b2b25SDaniel P. Berrangé } 867145614a1SDaniel P. Berrange } 868145614a1SDaniel P. Berrange 8693d212b41SRichard W.M. Jones if (selinux_label) { 8703d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 8713d212b41SRichard W.M. Jones if (sockpath == NULL && device == NULL) { 8723d212b41SRichard W.M. Jones error_report("--selinux-label is not permitted without --socket"); 8733d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8743d212b41SRichard W.M. Jones } 8753d212b41SRichard W.M. Jones #else 8763d212b41SRichard W.M. Jones error_report("SELinux support not enabled in this binary"); 8773d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8783d212b41SRichard W.M. Jones #endif 8793d212b41SRichard W.M. Jones } 8803d212b41SRichard W.M. Jones 88168b96f15SEric Blake if (list) { 88268b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 883003b2b25SDaniel P. Berrangé return qemu_nbd_client_list(saddr, tlscreds, 884003b2b25SDaniel P. Berrangé tlshostname ? tlshostname : bindto); 88568b96f15SEric Blake } 88668b96f15SEric Blake 8873c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8883c1fa35dSEric Blake if (disconnect || device) { 8893c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8903c1fa35dSEric Blake exit(EXIT_FAILURE); 8913c1fa35dSEric Blake } 8923c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 893cd831bd7Sths if (disconnect) { 894d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 895d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 89685b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 89785b01e09SMarkus Armbruster strerror(errno)); 89885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 899fc19f8a0SPaolo Bonzini } 900d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 901cd831bd7Sths 902d0d6ff58SDaniel P. Berrange close(nbdfd); 903cd831bd7Sths 904cd831bd7Sths printf("%s disconnected\n", argv[optind]); 905cd831bd7Sths 906cd831bd7Sths return 0; 907cd831bd7Sths } 9083c1fa35dSEric Blake #endif 909cd831bd7Sths 910ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 911eb705985SDaniel P. Berrangé #ifndef WIN32 912a7241974SMarc-André Lureau g_autoptr(GError) err = NULL; 913c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 914c1f8fdc3SPaolo Bonzini pid_t pid; 915c1f8fdc3SPaolo Bonzini int ret; 916c1f8fdc3SPaolo Bonzini 917a7241974SMarc-André Lureau if (!g_unix_open_pipe(stderr_fd, FD_CLOEXEC, &err)) { 91885b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 919a7241974SMarc-André Lureau err->message); 92085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 921c1f8fdc3SPaolo Bonzini } 922c1f8fdc3SPaolo Bonzini 923c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 924c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 925c1f8fdc3SPaolo Bonzini */ 926c1f8fdc3SPaolo Bonzini pid = fork(); 92770d4739eSMax Reitz if (pid < 0) { 92885b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 92985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 93070d4739eSMax Reitz } else if (pid == 0) { 931c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 932e6df58a5SMax Reitz 9330eaf453eSRaphael Pour /* Remember parent's stderr if we will be restoring it. */ 9340eaf453eSRaphael Pour if (fork_process) { 935e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 9360eaf453eSRaphael Pour } 9370eaf453eSRaphael Pour 9389faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 939c1f8fdc3SPaolo Bonzini 940c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 941c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 942fc19f8a0SPaolo Bonzini if (ret < 0) { 94385b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 94485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 945c1f8fdc3SPaolo Bonzini } 946c1f8fdc3SPaolo Bonzini 947c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 948c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 949c1f8fdc3SPaolo Bonzini } else { 950c1f8fdc3SPaolo Bonzini bool errors = false; 951c1f8fdc3SPaolo Bonzini char *buf; 952c1f8fdc3SPaolo Bonzini 953c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 954c1f8fdc3SPaolo Bonzini * it closes the pipe. 955c1f8fdc3SPaolo Bonzini */ 956c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 957c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 958c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 959c1f8fdc3SPaolo Bonzini errors = true; 960c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 961fc19f8a0SPaolo Bonzini if (ret < 0) { 962c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 963c1f8fdc3SPaolo Bonzini } 964c1f8fdc3SPaolo Bonzini } 965fc19f8a0SPaolo Bonzini if (ret < 0) { 96685b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 96785b01e09SMarkus Armbruster strerror(errno)); 96885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 969c1f8fdc3SPaolo Bonzini } 970c1f8fdc3SPaolo Bonzini 971c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 972c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 973c1f8fdc3SPaolo Bonzini */ 974c1f8fdc3SPaolo Bonzini exit(errors); 975c1f8fdc3SPaolo Bonzini } 976eb705985SDaniel P. Berrangé #else /* WIN32 */ 977eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 978eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 979eb705985SDaniel P. Berrangé #endif /* WIN32 */ 980c1f8fdc3SPaolo Bonzini } 981c1f8fdc3SPaolo Bonzini 982a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 983b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 984b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 985cd831bd7Sths } 986cd831bd7Sths 987e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 988a721f53bSRichard W.M. Jones if (socket_activation == 0) { 989582d4210SEric Blake int backlog; 990582d4210SEric Blake 9913dcf56e6SEric Blake if (persistent || shared == 0) { 992582d4210SEric Blake backlog = SOMAXCONN; 993582d4210SEric Blake } else { 994582d4210SEric Blake backlog = MIN(shared, SOMAXCONN); 995582d4210SEric Blake } 9963d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 9973d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(selinux_label) == -1) { 9983d212b41SRichard W.M. Jones error_report("Cannot set SELinux socket create context to %s: %s", 9993d212b41SRichard W.M. Jones selinux_label, strerror(errno)); 10003d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10013d212b41SRichard W.M. Jones } 10023d212b41SRichard W.M. Jones #endif 100348bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 1004582d4210SEric Blake if (qio_net_listener_open_sync(server, saddr, backlog, 1005582d4210SEric Blake &local_err) < 0) { 1006e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1007a721f53bSRichard W.M. Jones error_report_err(local_err); 1008e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1009a721f53bSRichard W.M. Jones } 10103d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10113d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(NULL) == -1) { 10123d212b41SRichard W.M. Jones error_report("Cannot clear SELinux socket create context: %s", 10133d212b41SRichard W.M. Jones strerror(errno)); 10143d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10153d212b41SRichard W.M. Jones } 10163d212b41SRichard W.M. Jones #endif 1017a721f53bSRichard W.M. Jones } else { 1018e4849c1dSDaniel P. Berrange size_t i; 1019a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1020e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1021e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1022e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1023a721f53bSRichard W.M. Jones &local_err); 1024e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1025e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 10265217f188SMarkus Armbruster error_reportf_err(local_err, 10275217f188SMarkus Armbruster "Failed to use socket activation: "); 1028a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1029a721f53bSRichard W.M. Jones } 1030e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1031e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1032e4849c1dSDaniel P. Berrange } 1033a721f53bSRichard W.M. Jones } 103448bec07eSDaniel P. Berrange 1035f9734d5dSMarkus Armbruster qemu_init_main_loop(&error_fatal); 1036802ddc37SPaolo Bonzini bdrv_init(); 1037b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1038802ddc37SPaolo Bonzini 103977c9aaefSDaniel P. Berrange srcpath = argv[optind]; 104077c9aaefSDaniel P. Berrange if (imageOpts) { 104177c9aaefSDaniel P. Berrange QemuOpts *opts; 104277c9aaefSDaniel P. Berrange if (fmt) { 104377c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 104477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 104577c9aaefSDaniel P. Berrange } 104677c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 104777c9aaefSDaniel P. Berrange if (!opts) { 104877c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 104977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 105077c9aaefSDaniel P. Berrange } 105177c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 105277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1053efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 105477c9aaefSDaniel P. Berrange } else { 1055e6b63677SDaniel P. Berrange if (fmt) { 10564fbec260SMax Reitz options = qdict_new(); 105746f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1058e6b63677SDaniel P. Berrange } 1059efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 106077c9aaefSDaniel P. Berrange } 106177c9aaefSDaniel P. Berrange 10624fbec260SMax Reitz if (!blk) { 1063c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1064c29b77f9SMarkus Armbruster argv[optind]); 106585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1066802ddc37SPaolo Bonzini } 10674fbec260SMax Reitz bs = blk_bs(blk); 1068802ddc37SPaolo Bonzini 1069b57e4de0SKevin Wolf if (dev_offset) { 1070b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1071b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1072b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1073b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1074*c6e0a6deSKevin Wolf 1075*c6e0a6deSKevin Wolf aio_context_acquire(qemu_get_aio_context()); 1076b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1077*c6e0a6deSKevin Wolf aio_context_release(qemu_get_aio_context()); 1078*c6e0a6deSKevin Wolf 1079b57e4de0SKevin Wolf blk_remove_bs(blk); 1080b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1081b57e4de0SKevin Wolf bdrv_unref(bs); 1082b57e4de0SKevin Wolf } 1083b57e4de0SKevin Wolf 10846effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 10856effd5bfSKevin Wolf 10868c116b0eSWenchao Xia if (sn_opts) { 10878c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 10888c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 10898c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 10908c116b0eSWenchao Xia &local_err); 10918c116b0eSWenchao Xia } else if (sn_id_or_name) { 10928c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 10938c116b0eSWenchao Xia &local_err); 10948c116b0eSWenchao Xia } 10958c116b0eSWenchao Xia if (ret < 0) { 1096c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 109785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10988c116b0eSWenchao Xia } 10998c116b0eSWenchao Xia 1100b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 1101802ddc37SPaolo Bonzini 1102a5fced40SEric Blake nbd_server_is_qemu_nbd(shared); 110300917172SKevin Wolf 110400917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 110500917172SKevin Wolf *export_opts = (BlockExportOptions) { 110600917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1107d53be9ceSKevin Wolf .id = g_strdup("qemu-nbd-export"), 1108b6076afcSKevin Wolf .node_name = g_strdup(bdrv_get_node_name(bs)), 110900917172SKevin Wolf .has_writethrough = true, 111000917172SKevin Wolf .writethrough = writethrough, 111130dbc81dSKevin Wolf .has_writable = true, 111230dbc81dSKevin Wolf .writable = !readonly, 111300917172SKevin Wolf .u.nbd = { 111400917172SKevin Wolf .name = g_strdup(export_name), 111500917172SKevin Wolf .description = g_strdup(export_description), 1116cbad81ceSEric Blake .has_bitmaps = !!bitmaps, 1117cbad81ceSEric Blake .bitmaps = bitmaps, 1118dbc7b014SEric Blake .has_allocation_depth = alloc_depth, 1119dbc7b014SEric Blake .allocation_depth = alloc_depth, 112000917172SKevin Wolf }, 112100917172SKevin Wolf }; 112200917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 112300917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 11243b05a8e9Sths 1125f1ef5555SPaolo Bonzini if (device) { 11263c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1127f1ef5555SPaolo Bonzini int ret; 1128f1ef5555SPaolo Bonzini 1129a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1130f1ef5555SPaolo Bonzini if (ret != 0) { 113185b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 113285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1133f1ef5555SPaolo Bonzini } 11343c1fa35dSEric Blake #endif 1135f1ef5555SPaolo Bonzini } else { 1136f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1137f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1138f1ef5555SPaolo Bonzini } 1139f1ef5555SPaolo Bonzini 1140d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11417a5ca864Sbellard 1142637bc5a5SMax Reitz if (pid_file_name) { 1143637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1144637bc5a5SMax Reitz } 1145637bc5a5SMax Reitz 11469faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11479faf31b6SMichael Tokarev * to free any busy filesystems */ 11489faf31b6SMichael Tokarev if (chdir("/") < 0) { 114985b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 115085b01e09SMarkus Armbruster strerror(errno)); 115185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11529faf31b6SMichael Tokarev } 11539faf31b6SMichael Tokarev 1154ffb31e1dSMax Reitz if (fork_process) { 1155ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1156ffb31e1dSMax Reitz close(old_stderr); 1157ffb31e1dSMax Reitz } 1158ffb31e1dSMax Reitz 11597860a380SPaolo Bonzini state = RUNNING; 11603b05a8e9Sths do { 1161a61c6782SPaolo Bonzini main_loop_wait(false); 11627860a380SPaolo Bonzini if (state == TERMINATE) { 1163bc4ee65bSKevin Wolf blk_exp_close_all(); 1164d794f7f3SKevin Wolf state = TERMINATED; 11657860a380SPaolo Bonzini } 11667860a380SPaolo Bonzini } while (state != TERMINATED); 11672c8d9f06SPaolo Bonzini 116826f54e9aSMarkus Armbruster blk_unref(blk); 1169b32f6c28SPaolo Bonzini if (sockpath) { 1170b32f6c28SPaolo Bonzini unlink(sockpath); 1171b32f6c28SPaolo Bonzini } 11727a5ca864Sbellard 11738c116b0eSWenchao Xia qemu_opts_del(sn_opts); 11748c116b0eSWenchao Xia 1175a517e88bSPaolo Bonzini if (device) { 1176a517e88bSPaolo Bonzini void *ret; 1177a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1178a517e88bSPaolo Bonzini exit(ret != NULL); 1179a517e88bSPaolo Bonzini } else { 1180a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1181a517e88bSPaolo Bonzini } 11827a5ca864Sbellard } 1183