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 767860a380SPaolo Bonzini static int persistent = 0; 77d794f7f3SKevin Wolf static enum { RUNNING, TERMINATE, TERMINATED } state; 78a61c6782SPaolo Bonzini static int shared = 1; 79a61c6782SPaolo Bonzini static int nb_fds; 80e4849c1dSDaniel P. Berrange static QIONetListener *server; 81145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 82b25e12daSDaniel P. Berrange static const char *tlsauthz; 837a5ca864Sbellard 847a5ca864Sbellard static void usage(const char *name) 857a5ca864Sbellard { 86b033cd86SPaolo Bonzini (printf) ( 877a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8868b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8968b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 907a5ca864Sbellard "\n" 917a5ca864Sbellard " -h, --help display this help and exit\n" 927a5ca864Sbellard " -V, --version output version information and exit\n" 937a5ca864Sbellard "\n" 94b033cd86SPaolo Bonzini "Connection properties:\n" 95b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 96b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 97b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 98b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 99b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 100b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 101b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 102f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 103f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 104b033cd86SPaolo Bonzini "\n" 105b033cd86SPaolo Bonzini "Exposing part of the image:\n" 106b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 107dbc7b014SEric Blake " -A, --allocation-depth expose the allocation depth\n" 108636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 109b033cd86SPaolo Bonzini "\n" 1100ab3b337SDaniel P. Berrange "General purpose options:\n" 11168b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1120ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1130ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 114f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 115b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 116b25e12daSDaniel P. Berrange " authorization\n" 11739ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11839ca463eSDenis V. Lunev " specify tracing options\n" 119ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 120ffb31e1dSMax Reitz " once the server is running\n" 121637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1223d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 1233d212b41SRichard W.M. Jones " --selinux-label=LABEL set SELinux process label on listening socket\n" 1243d212b41SRichard W.M. Jones #endif 1253c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1263c1fa35dSEric Blake "\n" 127b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 128b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 129b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 130b033cd86SPaolo Bonzini #endif 131b033cd86SPaolo Bonzini "\n" 132b033cd86SPaolo Bonzini "Block device options:\n" 1334323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 134b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1358c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1368c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1378c116b0eSWenchao Xia " the temporary one\n" 1388c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1398c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1408c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1418c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1428c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 143b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 14409615257SNir Soffer " --cache=MODE set cache mode used to access the disk image, the\n" 14509615257SNir Soffer " valid options are: 'none', 'writeback' (default),\n" 14609615257SNir Soffer " 'writethrough', 'directsync' and 'unsafe'\n" 1477680274dSAarushi Mehta " --aio=MODE set AIO mode (native, io_uring or threads)\n" 148b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1496883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 15077c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 151b033cd86SPaolo Bonzini "\n" 152f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 15368b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1547a5ca864Sbellard } 1557a5ca864Sbellard 1567a5ca864Sbellard static void version(const char *name) 1577a5ca864Sbellard { 1587a5ca864Sbellard printf( 1597e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1607a5ca864Sbellard "Written by Anthony Liguori.\n" 1617a5ca864Sbellard "\n" 162be377133SEric Blake QEMU_COPYRIGHT "\n" 1637a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1647a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 165315bc7aaSths , name); 1667a5ca864Sbellard } 1677a5ca864Sbellard 168029a88c9SEric Blake #ifdef CONFIG_POSIX 169cbc20bfbSStefan Hajnoczi /* 170cbc20bfbSStefan Hajnoczi * The client thread uses SIGTERM to interrupt the server. A signal 171cbc20bfbSStefan Hajnoczi * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 172cbc20bfbSStefan Hajnoczi */ 173cbc20bfbSStefan Hajnoczi void qemu_system_killed(int signum, pid_t pid) 174bb345110SPaolo Bonzini { 175d73415a3SStefan Hajnoczi qatomic_cmpxchg(&state, RUNNING, TERMINATE); 176a61c6782SPaolo Bonzini qemu_notify_event(); 177bb345110SPaolo Bonzini } 178029a88c9SEric Blake #endif /* CONFIG_POSIX */ 179537b41f5SPaolo Bonzini 18068b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 18168b96f15SEric Blake const char *hostname) 18268b96f15SEric Blake { 18368b96f15SEric Blake int ret = EXIT_FAILURE; 18468b96f15SEric Blake int rc; 18568b96f15SEric Blake Error *err = NULL; 18668b96f15SEric Blake QIOChannelSocket *sioc; 18768b96f15SEric Blake NBDExportInfo *list; 18868b96f15SEric Blake int i, j; 18968b96f15SEric Blake 19068b96f15SEric Blake sioc = qio_channel_socket_new(); 19168b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 19268b96f15SEric Blake error_report_err(err); 193992809bfSAlex Chen goto out; 19468b96f15SEric Blake } 19568b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 19668b96f15SEric Blake &err); 19768b96f15SEric Blake if (rc < 0) { 19868b96f15SEric Blake if (err) { 19968b96f15SEric Blake error_report_err(err); 20068b96f15SEric Blake } 20168b96f15SEric Blake goto out; 20268b96f15SEric Blake } 20368b96f15SEric Blake printf("exports available: %d\n", rc); 20468b96f15SEric Blake for (i = 0; i < rc; i++) { 20568b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 20668b96f15SEric Blake if (list[i].description && *list[i].description) { 20768b96f15SEric Blake printf(" description: %s\n", list[i].description); 20868b96f15SEric Blake } 20968b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 210c4e2aff8SMax Reitz static const char *const flag_names[] = { 211c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 212c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 213c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 214c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 215c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 216c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 217c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 218c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 219c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 220c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 2210a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 222c4e2aff8SMax Reitz }; 223c4e2aff8SMax Reitz 22468b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 22568b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 226c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 227c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 228c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 22968b96f15SEric Blake } 23068b96f15SEric Blake } 23168b96f15SEric Blake printf(" )\n"); 23268b96f15SEric Blake } 23368b96f15SEric Blake if (list[i].min_block) { 23468b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 23568b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 23668b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 23768b96f15SEric Blake } 23868b96f15SEric Blake if (list[i].n_contexts) { 23968b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 24068b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 24168b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 24268b96f15SEric Blake } 24368b96f15SEric Blake } 24468b96f15SEric Blake } 24568b96f15SEric Blake nbd_free_export_list(list, rc); 24668b96f15SEric Blake 24768b96f15SEric Blake ret = EXIT_SUCCESS; 24868b96f15SEric Blake out: 24968b96f15SEric Blake object_unref(OBJECT(sioc)); 25068b96f15SEric Blake return ret; 25168b96f15SEric Blake } 25268b96f15SEric Blake 25368b96f15SEric Blake 2543484f676SDenis V. Lunev struct NbdClientOpts { 2553484f676SDenis V. Lunev char *device; 256b18d72d7SDenis V. Lunev char *srcpath; 257b2cecdfeSDenis V. Lunev SocketAddress *saddr; 2583484f676SDenis V. Lunev bool fork_process; 2593484f676SDenis V. Lunev bool verbose; 2603484f676SDenis V. Lunev }; 2613484f676SDenis V. Lunev 2623c1fa35dSEric Blake #if HAVE_NBD_DEVICE 263a517e88bSPaolo Bonzini static void *show_parts(void *arg) 264cd831bd7Sths { 265a6ac2313SPaolo Bonzini char *device = arg; 266cd831bd7Sths int nbd; 267cd831bd7Sths 268cd831bd7Sths /* linux just needs an open() to trigger 269cd831bd7Sths * the partition table update 270cd831bd7Sths * but remember to load the module with max_part != 0 : 271cd831bd7Sths * modprobe nbd max_part=63 272cd831bd7Sths */ 273cd831bd7Sths nbd = open(device, O_RDWR); 274fc19f8a0SPaolo Bonzini if (nbd >= 0) { 275cd831bd7Sths close(nbd); 276cd831bd7Sths } 277a517e88bSPaolo Bonzini return NULL; 278a517e88bSPaolo Bonzini } 279a517e88bSPaolo Bonzini 280a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 281a517e88bSPaolo Bonzini { 28203b67621SDenis V. Lunev struct NbdClientOpts *opts = arg; 2836dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 284d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 285af74b550SAlex Chen int fd = -1; 286af74b550SAlex Chen int ret = EXIT_FAILURE; 287a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2881ce52846SMax Reitz Error *local_error = NULL; 289a517e88bSPaolo Bonzini 290d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 291d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 292b2cecdfeSDenis V. Lunev opts->saddr, 293d0d6ff58SDaniel P. Berrange &local_error) < 0) { 29448bec07eSDaniel P. Berrange error_report_err(local_error); 295a517e88bSPaolo Bonzini goto out; 296a517e88bSPaolo Bonzini } 297a517e88bSPaolo Bonzini 298b84ca91cSStefan Hajnoczi if (nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, NULL, NULL, 299b84ca91cSStefan Hajnoczi &info, &local_error) < 0) { 3001ce52846SMax Reitz if (local_error) { 30178288671SMarkus Armbruster error_report_err(local_error); 3021ce52846SMax Reitz } 303af74b550SAlex Chen goto out; 304a517e88bSPaolo Bonzini } 305a517e88bSPaolo Bonzini 30603b67621SDenis V. Lunev fd = open(opts->device, O_RDWR); 307fc19f8a0SPaolo Bonzini if (fd < 0) { 308a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 30903b67621SDenis V. Lunev error_report("Failed to open %s: %m", opts->device); 310af74b550SAlex Chen goto out; 311a6ac2313SPaolo Bonzini } 312a6ac2313SPaolo Bonzini 313af74b550SAlex Chen if (nbd_init(fd, sioc, &info, &local_error) < 0) { 314be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 315af74b550SAlex Chen goto out; 316a517e88bSPaolo Bonzini } 317a517e88bSPaolo Bonzini 318a517e88bSPaolo Bonzini /* update partition table */ 31903b67621SDenis V. Lunev pthread_create(&show_parts_thread, NULL, show_parts, opts->device); 320a517e88bSPaolo Bonzini 321414c0cf0SDenis V. Lunev if (opts->verbose && !opts->fork_process) { 322a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 323b18d72d7SDenis V. Lunev opts->device, opts->srcpath); 324c1f8fdc3SPaolo Bonzini } else { 325c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 326173776f7SDenis V. Lunev if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) { 327b4bbdf51SDenis V. Lunev error_report("Could not release pipe to parent: %s", 328173776f7SDenis V. Lunev strerror(errno)); 329173776f7SDenis V. Lunev exit(EXIT_FAILURE); 330173776f7SDenis V. Lunev } 331c1f8fdc3SPaolo Bonzini } 332a517e88bSPaolo Bonzini 333af74b550SAlex Chen if (nbd_client(fd) < 0) { 334af74b550SAlex Chen goto out; 335a517e88bSPaolo Bonzini } 336a517e88bSPaolo Bonzini 337af74b550SAlex Chen ret = EXIT_SUCCESS; 338af74b550SAlex Chen 339a517e88bSPaolo Bonzini out: 340af74b550SAlex Chen if (fd >= 0) { 341af74b550SAlex Chen close(fd); 342af74b550SAlex Chen } 343af74b550SAlex Chen object_unref(OBJECT(sioc)); 3446dc1667dSEric Blake g_free(info.name); 345a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 346af74b550SAlex Chen return (void *) (intptr_t) ret; 347cd831bd7Sths } 3483c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 349cd831bd7Sths 350e4afbf4fSFam Zheng static int nbd_can_accept(void) 351a61c6782SPaolo Bonzini { 3523dcf56e6SEric Blake return state == RUNNING && (shared == 0 || nb_fds < shared); 353a61c6782SPaolo Bonzini } 354a61c6782SPaolo Bonzini 355d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 356e4afbf4fSFam Zheng 3570c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 358a61c6782SPaolo Bonzini { 359a61c6782SPaolo Bonzini nb_fds--; 3600c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3617860a380SPaolo Bonzini state = TERMINATE; 3627860a380SPaolo Bonzini } 363d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3647860a380SPaolo Bonzini nbd_client_put(client); 365a61c6782SPaolo Bonzini } 366a61c6782SPaolo Bonzini 367e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 368e4849c1dSDaniel P. Berrange gpointer opaque) 369a61c6782SPaolo Bonzini { 3707860a380SPaolo Bonzini if (state >= TERMINATE) { 371e4849c1dSDaniel P. Berrange return; 3727860a380SPaolo Bonzini } 3737860a380SPaolo Bonzini 374a61c6782SPaolo Bonzini nb_fds++; 375d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 376b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 377d0d6ff58SDaniel P. Berrange } 378d0d6ff58SDaniel P. Berrange 379d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 380e4afbf4fSFam Zheng { 381e4afbf4fSFam Zheng if (nbd_can_accept()) { 382e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 383e4afbf4fSFam Zheng } else { 384e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 385e4afbf4fSFam Zheng } 386e4afbf4fSFam Zheng } 387e4afbf4fSFam Zheng 38848bec07eSDaniel P. Berrange 389bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 39048bec07eSDaniel P. Berrange const char *bindto, 39148bec07eSDaniel P. Berrange const char *port) 39248bec07eSDaniel P. Berrange { 393bd269ebcSMarkus Armbruster SocketAddress *saddr; 39448bec07eSDaniel P. Berrange 395bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 39648bec07eSDaniel P. Berrange if (sockpath) { 397bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 398bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 39948bec07eSDaniel P. Berrange } else { 4000399293eSEric Blake InetSocketAddress *inet; 401bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 402bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 4030399293eSEric Blake inet->host = g_strdup(bindto); 40448bec07eSDaniel P. Berrange if (port) { 4050399293eSEric Blake inet->port = g_strdup(port); 40648bec07eSDaniel P. Berrange } else { 4070399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 40848bec07eSDaniel P. Berrange } 40948bec07eSDaniel P. Berrange } 41048bec07eSDaniel P. Berrange 41148bec07eSDaniel P. Berrange return saddr; 41248bec07eSDaniel P. Berrange } 41348bec07eSDaniel P. Berrange 41448bec07eSDaniel P. Berrange 41577c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 41677c9aaefSDaniel P. Berrange .name = "file", 41777c9aaefSDaniel P. Berrange .implied_opt_name = "file", 41877c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 41977c9aaefSDaniel P. Berrange .desc = { 42077c9aaefSDaniel P. Berrange /* no elements => accept any params */ 42177c9aaefSDaniel P. Berrange { /* end of list */ } 42277c9aaefSDaniel P. Berrange }, 42377c9aaefSDaniel P. Berrange }; 42477c9aaefSDaniel P. Berrange 42568b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 42668b96f15SEric Blake Error **errp) 427145614a1SDaniel P. Berrange { 428145614a1SDaniel P. Berrange Object *obj; 429145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 430145614a1SDaniel P. Berrange 431145614a1SDaniel P. Berrange obj = object_resolve_path_component( 432145614a1SDaniel P. Berrange object_get_objects_root(), id); 433145614a1SDaniel P. Berrange if (!obj) { 434145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 435145614a1SDaniel P. Berrange id); 436145614a1SDaniel P. Berrange return NULL; 437145614a1SDaniel P. Berrange } 438145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 439145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 440145614a1SDaniel P. Berrange if (!creds) { 441145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 442145614a1SDaniel P. Berrange id); 443145614a1SDaniel P. Berrange return NULL; 444145614a1SDaniel P. Berrange } 445145614a1SDaniel P. Berrange 4460279cd95SPhilippe Mathieu-Daudé if (!qcrypto_tls_creds_check_endpoint(creds, 4470279cd95SPhilippe Mathieu-Daudé list 4480279cd95SPhilippe Mathieu-Daudé ? QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT 4490279cd95SPhilippe Mathieu-Daudé : QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4500279cd95SPhilippe Mathieu-Daudé errp)) { 45168b96f15SEric Blake return NULL; 45268b96f15SEric Blake } 453145614a1SDaniel P. Berrange object_ref(obj); 454145614a1SDaniel P. Berrange return creds; 455145614a1SDaniel P. Berrange } 456145614a1SDaniel P. Berrange 457a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 458a721f53bSRichard W.M. Jones { 459a721f53bSRichard W.M. Jones if (*address == NULL) { 460a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 461a721f53bSRichard W.M. Jones } 462a721f53bSRichard W.M. Jones 463a721f53bSRichard W.M. Jones if (*port == NULL) { 464a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 465a721f53bSRichard W.M. Jones } 466a721f53bSRichard W.M. Jones } 467a721f53bSRichard W.M. Jones 468a721f53bSRichard W.M. Jones /* 469a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 470a721f53bSRichard W.M. Jones */ 471a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 472a721f53bSRichard W.M. Jones const char *sockpath, 473a721f53bSRichard W.M. Jones const char *address, 47468b96f15SEric Blake const char *port, 4753d212b41SRichard W.M. Jones const char *selinux, 47668b96f15SEric Blake bool list) 477a721f53bSRichard W.M. Jones { 478a721f53bSRichard W.M. Jones if (device != NULL) { 479a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 480a721f53bSRichard W.M. Jones } 481a721f53bSRichard W.M. Jones 482a721f53bSRichard W.M. Jones if (sockpath != NULL) { 483a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 484a721f53bSRichard W.M. Jones } 485a721f53bSRichard W.M. Jones 486a721f53bSRichard W.M. Jones if (address != NULL) { 487a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 488a721f53bSRichard W.M. Jones } 489a721f53bSRichard W.M. Jones 490a721f53bSRichard W.M. Jones if (port != NULL) { 491a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 492a721f53bSRichard W.M. Jones } 493a721f53bSRichard W.M. Jones 4943d212b41SRichard W.M. Jones if (selinux != NULL) { 4953d212b41SRichard W.M. Jones return "SELinux label can't be set when using socket activation"; 4963d212b41SRichard W.M. Jones } 4973d212b41SRichard W.M. Jones 49868b96f15SEric Blake if (list) { 49968b96f15SEric Blake return "List mode is incompatible with socket activation"; 50068b96f15SEric Blake } 50168b96f15SEric Blake 502a721f53bSRichard W.M. Jones return NULL; 503a721f53bSRichard W.M. Jones } 504145614a1SDaniel P. Berrange 505b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 506b3b5299dSKevin Wolf { 507b3b5299dSKevin Wolf job_cancel_sync_all(); 5081895b977SSergio Lopez blk_exp_close_all(); 509b3b5299dSKevin Wolf bdrv_close_all(); 510b3b5299dSKevin Wolf } 511b3b5299dSKevin Wolf 5127a5ca864Sbellard int main(int argc, char **argv) 5137a5ca864Sbellard { 51426f54e9aSMarkus Armbruster BlockBackend *blk; 5157a5ca864Sbellard BlockDriverState *bs; 5169d26dfcbSEric Blake uint64_t dev_offset = 0; 517dbb38caaSEric Blake bool readonly = false; 518cd831bd7Sths bool disconnect = false; 519a721f53bSRichard W.M. Jones const char *bindto = NULL; 52048bec07eSDaniel P. Berrange const char *port = NULL; 52148bec07eSDaniel P. Berrange char *sockpath = NULL; 5228c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5238c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 524dbc7b014SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:AB:L"; 5257a5ca864Sbellard struct option lopt[] = { 526aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 527aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 528aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 529aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 530aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 531aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 532aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 533dbc7b014SEric Blake { "allocation-depth", no_argument, NULL, 'A' }, 534636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 535aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 536aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 53768b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 538aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 539aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 540aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 541aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 542aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 543aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 544aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 545aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 546aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 547aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 548aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 549aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 550aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 551aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 552b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 553aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 554003b2b25SDaniel P. Berrangé { "tls-hostname", required_argument, NULL, QEMU_NBD_OPT_TLSHOSTNAME }, 555b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 556aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 55739ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 558ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 559637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 5603d212b41SRichard W.M. Jones { "selinux-label", required_argument, NULL, 5613d212b41SRichard W.M. Jones QEMU_NBD_OPT_SELINUX_LABEL }, 562660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5637a5ca864Sbellard }; 5647a5ca864Sbellard int ch; 5657a5ca864Sbellard int opt_ind = 0; 566f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5674fbec260SMax Reitz int ret = 0; 56839a5235cSPaolo Bonzini bool seen_cache = false; 569ded9d2d5SPaolo Bonzini bool seen_discard = false; 57039a5235cSPaolo Bonzini bool seen_aio = false; 571a517e88bSPaolo Bonzini pthread_t client_thread; 572e6b63677SDaniel P. Berrange const char *fmt = NULL; 57334b5d2c6SMax Reitz Error *local_err = NULL; 574b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5754fbec260SMax Reitz QDict *options = NULL; 57668b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 577b1a75b33SEric Blake const char *export_description = NULL; 578e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStrList *bitmaps = NULL; 579dbc7b014SEric Blake bool alloc_depth = false; 580145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 581003b2b25SDaniel P. Berrangé const char *tlshostname = NULL; 58277c9aaefSDaniel P. Berrange bool imageOpts = false; 58309615257SNir Soffer bool writethrough = false; /* Client will flush as needed. */ 58468b96f15SEric Blake bool list = false; 585a721f53bSRichard W.M. Jones unsigned socket_activation; 586637bc5a5SMax Reitz const char *pid_file_name = NULL; 5873d212b41SRichard W.M. Jones const char *selinux_label = NULL; 58800917172SKevin Wolf BlockExportOptions *export_opts; 5893484f676SDenis V. Lunev struct NbdClientOpts opts = { 5903484f676SDenis V. Lunev .fork_process = false, 5913484f676SDenis V. Lunev .verbose = false, 5923484f676SDenis V. Lunev .device = NULL, 593b18d72d7SDenis V. Lunev .srcpath = NULL, 594b2cecdfeSDenis V. Lunev .saddr = NULL, 5953484f676SDenis V. Lunev }; 5967a5ca864Sbellard 597029a88c9SEric Blake #ifdef CONFIG_POSIX 598cbc20bfbSStefan Hajnoczi os_setup_early_signal_handling(); 599cbc20bfbSStefan Hajnoczi os_setup_signal_handling(); 600041e32b8SMax Reitz #endif 601041e32b8SMax Reitz 60298c5d2e7SDaniel P. Berrangé socket_init(); 603f5852efaSChristophe Fergeau error_init(argv[0]); 604fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 605e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 606c2297088SDaniel P. Berrange 6070ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 60839ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 60910f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 610bb345110SPaolo Bonzini 6117a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6127a5ca864Sbellard switch (ch) { 6137a5ca864Sbellard case 's': 6142f726488Sths flags |= BDRV_O_SNAPSHOT; 6152f726488Sths break; 6162f726488Sths case 'n': 61739a5235cSPaolo Bonzini optarg = (char *) "none"; 61839a5235cSPaolo Bonzini /* fallthrough */ 61939a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 62039a5235cSPaolo Bonzini if (seen_cache) { 62185b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 62285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62339a5235cSPaolo Bonzini } 62439a5235cSPaolo Bonzini seen_cache = true; 6256effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 62685b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 62785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62839a5235cSPaolo Bonzini } 6297a5ca864Sbellard break; 63039a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 63139a5235cSPaolo Bonzini if (seen_aio) { 63285b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 63385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63439a5235cSPaolo Bonzini } 63539a5235cSPaolo Bonzini seen_aio = true; 6367680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6377680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 63885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63939a5235cSPaolo Bonzini } 64039a5235cSPaolo Bonzini break; 641ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 642ded9d2d5SPaolo Bonzini if (seen_discard) { 64385b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 64485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 645ded9d2d5SPaolo Bonzini } 646ded9d2d5SPaolo Bonzini seen_discard = true; 647ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 64885b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 64985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 650ded9d2d5SPaolo Bonzini } 651ded9d2d5SPaolo Bonzini break; 652b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 653b3838a40SPeter Lieven detect_zeroes = 654f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 655b3838a40SPeter Lieven optarg, 656b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 657b3838a40SPeter Lieven &local_err); 658b3838a40SPeter Lieven if (local_err) { 659c29b77f9SMarkus Armbruster error_reportf_err(local_err, 660c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 66185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 662b3838a40SPeter Lieven } 663b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 664b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 66585b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 666b3838a40SPeter Lieven "without setting discard operation to unmap"); 66785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 668b3838a40SPeter Lieven } 669b3838a40SPeter Lieven break; 6707a5ca864Sbellard case 'b': 6717a5ca864Sbellard bindto = optarg; 6727a5ca864Sbellard break; 6737a5ca864Sbellard case 'p': 67448bec07eSDaniel P. Berrange port = optarg; 6757a5ca864Sbellard break; 6767a5ca864Sbellard case 'o': 67743b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 67843b51011SEric Blake error_report("Invalid offset '%s'", optarg); 67985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6807a5ca864Sbellard } 6817a5ca864Sbellard break; 6828c116b0eSWenchao Xia case 'l': 6838c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 68470b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 68570b94331SMarkus Armbruster optarg, false); 6868c116b0eSWenchao Xia if (!sn_opts) { 68785b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6888c116b0eSWenchao Xia optarg); 68985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6908c116b0eSWenchao Xia } 6918c116b0eSWenchao Xia } else { 6928c116b0eSWenchao Xia sn_id_or_name = optarg; 6938c116b0eSWenchao Xia } 6948c116b0eSWenchao Xia /* fall through */ 6957a5ca864Sbellard case 'r': 696dbb38caaSEric Blake readonly = true; 69707108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6987a5ca864Sbellard break; 699dbc7b014SEric Blake case 'A': 700dbc7b014SEric Blake alloc_depth = true; 701dbc7b014SEric Blake break; 702636192c4SEric Blake case 'B': 703e5fb29d5SVladimir Sementsov-Ogievskiy { 704e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStr *el = g_new(BlockDirtyBitmapOrStr, 1); 705e5fb29d5SVladimir Sementsov-Ogievskiy *el = (BlockDirtyBitmapOrStr) { 706e5fb29d5SVladimir Sementsov-Ogievskiy .type = QTYPE_QSTRING, 707e5fb29d5SVladimir Sementsov-Ogievskiy .u.local = g_strdup(optarg), 708e5fb29d5SVladimir Sementsov-Ogievskiy }; 709e5fb29d5SVladimir Sementsov-Ogievskiy QAPI_LIST_PREPEND(bitmaps, el); 710e5fb29d5SVladimir Sementsov-Ogievskiy } 711636192c4SEric Blake break; 712cd831bd7Sths case 'k': 713b32f6c28SPaolo Bonzini sockpath = optarg; 714713cc671SPeter Lieven if (sockpath[0] != '/') { 7159af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 71685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 717713cc671SPeter Lieven } 718cd831bd7Sths break; 719cd831bd7Sths case 'd': 720cd831bd7Sths disconnect = true; 721cd831bd7Sths break; 722cd831bd7Sths case 'c': 7233484f676SDenis V. Lunev opts.device = optarg; 724cd831bd7Sths break; 7253b05a8e9Sths case 'e': 72643b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 7273dcf56e6SEric Blake shared < 0) { 72885b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 72985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7303b05a8e9Sths } 7313b05a8e9Sths break; 732e6b63677SDaniel P. Berrange case 'f': 733e6b63677SDaniel P. Berrange fmt = optarg; 734e6b63677SDaniel P. Berrange break; 73575818250Sths case 't': 73675818250Sths persistent = 1; 73775818250Sths break; 7383d4b2f9cSDaniel P. Berrange case 'x': 7393d4b2f9cSDaniel P. Berrange export_name = optarg; 74093676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 74193676c88SEric Blake error_report("export name '%s' too long", export_name); 74293676c88SEric Blake exit(EXIT_FAILURE); 74393676c88SEric Blake } 7443d4b2f9cSDaniel P. Berrange break; 745b1a75b33SEric Blake case 'D': 746b1a75b33SEric Blake export_description = optarg; 74793676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 74893676c88SEric Blake error_report("export description '%s' too long", 74993676c88SEric Blake export_description); 75093676c88SEric Blake exit(EXIT_FAILURE); 75193676c88SEric Blake } 752b1a75b33SEric Blake break; 7537a5ca864Sbellard case 'v': 7543484f676SDenis V. Lunev opts.verbose = true; 7557a5ca864Sbellard break; 7567a5ca864Sbellard case 'V': 7577a5ca864Sbellard version(argv[0]); 7587a5ca864Sbellard exit(0); 7597a5ca864Sbellard break; 7607a5ca864Sbellard case 'h': 7617a5ca864Sbellard usage(argv[0]); 7627a5ca864Sbellard exit(0); 7637a5ca864Sbellard break; 7647a5ca864Sbellard case '?': 76585b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 76685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 767fa40e43cSKevin Wolf case QEMU_NBD_OPT_OBJECT: 768fa40e43cSKevin Wolf user_creatable_process_cmdline(optarg); 769fa40e43cSKevin Wolf break; 770145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 771145614a1SDaniel P. Berrange tlscredsid = optarg; 772145614a1SDaniel P. Berrange break; 773003b2b25SDaniel P. Berrangé case QEMU_NBD_OPT_TLSHOSTNAME: 774003b2b25SDaniel P. Berrangé tlshostname = optarg; 775003b2b25SDaniel P. Berrangé break; 77677c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 77777c9aaefSDaniel P. Berrange imageOpts = true; 77877c9aaefSDaniel P. Berrange break; 77939ca463eSDenis V. Lunev case 'T': 78092eecfffSPaolo Bonzini trace_opt_parse(optarg); 78139ca463eSDenis V. Lunev break; 782b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 783b25e12daSDaniel P. Berrange tlsauthz = optarg; 784b25e12daSDaniel P. Berrange break; 785ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 7863484f676SDenis V. Lunev opts.fork_process = true; 787ffb31e1dSMax Reitz break; 78868b96f15SEric Blake case 'L': 78968b96f15SEric Blake list = true; 79068b96f15SEric Blake break; 791637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 792637bc5a5SMax Reitz pid_file_name = optarg; 793637bc5a5SMax Reitz break; 7943d212b41SRichard W.M. Jones case QEMU_NBD_OPT_SELINUX_LABEL: 7953d212b41SRichard W.M. Jones selinux_label = optarg; 7963d212b41SRichard W.M. Jones break; 7977a5ca864Sbellard } 7987a5ca864Sbellard } 7997a5ca864Sbellard 80068b96f15SEric Blake if (list) { 80168b96f15SEric Blake if (argc != optind) { 80268b96f15SEric Blake error_report("List mode is incompatible with a file name"); 80368b96f15SEric Blake exit(EXIT_FAILURE); 80468b96f15SEric Blake } 8050bc16997SEric Blake if (export_name || export_description || dev_offset || 8063484f676SDenis V. Lunev opts.device || disconnect || fmt || sn_id_or_name || bitmaps || 807dbc7b014SEric Blake alloc_depth || seen_aio || seen_discard || seen_cache) { 80868b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 80968b96f15SEric Blake exit(EXIT_FAILURE); 81068b96f15SEric Blake } 8113484f676SDenis V. Lunev if (opts.fork_process) { 81268b96f15SEric Blake error_report("List mode is incompatible with forking"); 81368b96f15SEric Blake exit(EXIT_FAILURE); 81468b96f15SEric Blake } 81568b96f15SEric Blake } else if ((argc - optind) != 1) { 816433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 817433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 81885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 81968b96f15SEric Blake } else if (!export_name) { 82068b96f15SEric Blake export_name = ""; 8217a5ca864Sbellard } 8227a5ca864Sbellard 82339ca463eSDenis V. Lunev if (!trace_init_backends()) { 82439ca463eSDenis V. Lunev exit(1); 82539ca463eSDenis V. Lunev } 82692eecfffSPaolo Bonzini trace_init_file(); 827c5955f4fSRichard Henderson qemu_set_log(LOG_TRACE, &error_fatal); 82839ca463eSDenis V. Lunev 829a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 830a721f53bSRichard W.M. Jones if (socket_activation == 0) { 831e8ae8b1aSDaniel P. Berrangé if (!sockpath) { 832a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 833e8ae8b1aSDaniel P. Berrangé } 834a721f53bSRichard W.M. Jones } else { 835a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 8363484f676SDenis V. Lunev const char *err_msg = socket_activation_validate_opts(opts.device, 8373484f676SDenis V. Lunev sockpath, 83868b96f15SEric Blake bindto, port, 8393d212b41SRichard W.M. Jones selinux_label, 84068b96f15SEric Blake list); 841a721f53bSRichard W.M. Jones if (err_msg != NULL) { 842a721f53bSRichard W.M. Jones error_report("%s", err_msg); 843a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 844a721f53bSRichard W.M. Jones } 84553fabd4bSPaolo Bonzini 84653fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 84753fabd4bSPaolo Bonzini if (socket_activation > 1) { 84853fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 84953fabd4bSPaolo Bonzini "LISTEN_FDS"); 85053fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 85153fabd4bSPaolo Bonzini } 852a721f53bSRichard W.M. Jones } 853a721f53bSRichard W.M. Jones 854145614a1SDaniel P. Berrange if (tlscredsid) { 8553484f676SDenis V. Lunev if (opts.device) { 856145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 857145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 858145614a1SDaniel P. Berrange } 859b25e12daSDaniel P. Berrange if (tlsauthz && list) { 860b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 861b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 862b25e12daSDaniel P. Berrange } 863003b2b25SDaniel P. Berrangé if (tlshostname && !list) { 864003b2b25SDaniel P. Berrangé error_report("TLS hostname is only supported with export list"); 865003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 866003b2b25SDaniel P. Berrangé } 86768b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 868145614a1SDaniel P. Berrange if (local_err) { 8695217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 870145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 871145614a1SDaniel P. Berrange } 872b25e12daSDaniel P. Berrange } else { 873b25e12daSDaniel P. Berrange if (tlsauthz) { 874b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 875b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 876b25e12daSDaniel P. Berrange } 877003b2b25SDaniel P. Berrangé if (tlshostname) { 878003b2b25SDaniel P. Berrangé error_report("--tls-hostname is not permitted without --tls-creds"); 879003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 880003b2b25SDaniel P. Berrangé } 881145614a1SDaniel P. Berrange } 882145614a1SDaniel P. Berrange 8833d212b41SRichard W.M. Jones if (selinux_label) { 8843d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 8853484f676SDenis V. Lunev if (sockpath == NULL && opts.device == NULL) { 8863d212b41SRichard W.M. Jones error_report("--selinux-label is not permitted without --socket"); 8873d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8883d212b41SRichard W.M. Jones } 8893d212b41SRichard W.M. Jones #else 8903d212b41SRichard W.M. Jones error_report("SELinux support not enabled in this binary"); 8913d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8923d212b41SRichard W.M. Jones #endif 8933d212b41SRichard W.M. Jones } 8943d212b41SRichard W.M. Jones 89568b96f15SEric Blake if (list) { 896b2cecdfeSDenis V. Lunev opts.saddr = nbd_build_socket_address(sockpath, bindto, port); 897b2cecdfeSDenis V. Lunev return qemu_nbd_client_list(opts.saddr, tlscreds, 898003b2b25SDaniel P. Berrangé tlshostname ? tlshostname : bindto); 89968b96f15SEric Blake } 90068b96f15SEric Blake 9013c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 9023484f676SDenis V. Lunev if (disconnect || opts.device) { 9033c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 9043c1fa35dSEric Blake exit(EXIT_FAILURE); 9053c1fa35dSEric Blake } 9063c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 907cd831bd7Sths if (disconnect) { 908d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 909d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 91085b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 91185b01e09SMarkus Armbruster strerror(errno)); 91285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 913fc19f8a0SPaolo Bonzini } 914d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 915cd831bd7Sths 916d0d6ff58SDaniel P. Berrange close(nbdfd); 917cd831bd7Sths 918cd831bd7Sths printf("%s disconnected\n", argv[optind]); 919cd831bd7Sths 920cd831bd7Sths return 0; 921cd831bd7Sths } 9223c1fa35dSEric Blake #endif 923cd831bd7Sths 9243484f676SDenis V. Lunev if ((opts.device && !opts.verbose) || opts.fork_process) { 925eb705985SDaniel P. Berrangé #ifndef WIN32 926a7241974SMarc-André Lureau g_autoptr(GError) err = NULL; 927c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 928c1f8fdc3SPaolo Bonzini pid_t pid; 929c1f8fdc3SPaolo Bonzini int ret; 930c1f8fdc3SPaolo Bonzini 931a7241974SMarc-André Lureau if (!g_unix_open_pipe(stderr_fd, FD_CLOEXEC, &err)) { 93285b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 933a7241974SMarc-André Lureau err->message); 93485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 935c1f8fdc3SPaolo Bonzini } 936c1f8fdc3SPaolo Bonzini 937c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 938c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 939c1f8fdc3SPaolo Bonzini */ 940c1f8fdc3SPaolo Bonzini pid = fork(); 94170d4739eSMax Reitz if (pid < 0) { 94285b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 94385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 94470d4739eSMax Reitz } else if (pid == 0) { 9451dc82151SDenis V. Lunev int saved_errno; 9461dc82151SDenis V. Lunev 947c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 948e6df58a5SMax Reitz 9499faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 9501dc82151SDenis V. Lunev saved_errno = errno; /* dup2 will overwrite error below */ 951c1f8fdc3SPaolo Bonzini 952c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 953e0892cedSDenis V. Lunev if (dup2(stderr_fd[1], STDERR_FILENO) < 0) { 954e0892cedSDenis V. Lunev char str[256]; 955e0892cedSDenis V. Lunev snprintf(str, sizeof(str), 956e0892cedSDenis V. Lunev "%s: Failed to link stderr to the pipe: %s\n", 957e0892cedSDenis V. Lunev g_get_prgname(), strerror(errno)); 958e0892cedSDenis V. Lunev /* 959e0892cedSDenis V. Lunev * We are unable to use error_report() here as we need to get 960e0892cedSDenis V. Lunev * stderr pointed to the parent's pipe. Write to that pipe 961e0892cedSDenis V. Lunev * manually. 962e0892cedSDenis V. Lunev */ 963e0892cedSDenis V. Lunev ret = write(stderr_fd[1], str, strlen(str)); 964e0892cedSDenis V. Lunev exit(EXIT_FAILURE); 965e0892cedSDenis V. Lunev } 966e0892cedSDenis V. Lunev 967fc19f8a0SPaolo Bonzini if (ret < 0) { 9681dc82151SDenis V. Lunev error_report("Failed to daemonize: %s", strerror(saved_errno)); 96985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 970c1f8fdc3SPaolo Bonzini } 971c1f8fdc3SPaolo Bonzini 972c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 973c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 974c1f8fdc3SPaolo Bonzini } else { 975c1f8fdc3SPaolo Bonzini bool errors = false; 976c1f8fdc3SPaolo Bonzini char *buf; 977c1f8fdc3SPaolo Bonzini 978c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 979c1f8fdc3SPaolo Bonzini * it closes the pipe. 980c1f8fdc3SPaolo Bonzini */ 981c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 982c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 983c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 984c1f8fdc3SPaolo Bonzini errors = true; 985c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 986fc19f8a0SPaolo Bonzini if (ret < 0) { 987c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 988c1f8fdc3SPaolo Bonzini } 989c1f8fdc3SPaolo Bonzini } 990fc19f8a0SPaolo Bonzini if (ret < 0) { 99185b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 99285b01e09SMarkus Armbruster strerror(errno)); 99385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 994c1f8fdc3SPaolo Bonzini } 995c1f8fdc3SPaolo Bonzini 996c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 997c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 998c1f8fdc3SPaolo Bonzini */ 999c1f8fdc3SPaolo Bonzini exit(errors); 1000c1f8fdc3SPaolo Bonzini } 1001eb705985SDaniel P. Berrangé #else /* WIN32 */ 1002eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 1003eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 1004eb705985SDaniel P. Berrangé #endif /* WIN32 */ 1005c1f8fdc3SPaolo Bonzini } 1006c1f8fdc3SPaolo Bonzini 10073484f676SDenis V. Lunev if (opts.device != NULL && sockpath == NULL) { 1008b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 10093484f676SDenis V. Lunev snprintf(sockpath, 128, SOCKET_PATH, basename(opts.device)); 1010cd831bd7Sths } 1011cd831bd7Sths 1012e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1013a721f53bSRichard W.M. Jones if (socket_activation == 0) { 1014582d4210SEric Blake int backlog; 1015582d4210SEric Blake 10163dcf56e6SEric Blake if (persistent || shared == 0) { 1017582d4210SEric Blake backlog = SOMAXCONN; 1018582d4210SEric Blake } else { 1019582d4210SEric Blake backlog = MIN(shared, SOMAXCONN); 1020582d4210SEric Blake } 10213d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10223d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(selinux_label) == -1) { 10233d212b41SRichard W.M. Jones error_report("Cannot set SELinux socket create context to %s: %s", 10243d212b41SRichard W.M. Jones selinux_label, strerror(errno)); 10253d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10263d212b41SRichard W.M. Jones } 10273d212b41SRichard W.M. Jones #endif 1028b2cecdfeSDenis V. Lunev opts.saddr = nbd_build_socket_address(sockpath, bindto, port); 1029b2cecdfeSDenis V. Lunev if (qio_net_listener_open_sync(server, opts.saddr, backlog, 1030582d4210SEric Blake &local_err) < 0) { 1031e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1032a721f53bSRichard W.M. Jones error_report_err(local_err); 1033e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1034a721f53bSRichard W.M. Jones } 10353d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10363d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(NULL) == -1) { 10373d212b41SRichard W.M. Jones error_report("Cannot clear SELinux socket create context: %s", 10383d212b41SRichard W.M. Jones strerror(errno)); 10393d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10403d212b41SRichard W.M. Jones } 10413d212b41SRichard W.M. Jones #endif 1042a721f53bSRichard W.M. Jones } else { 1043e4849c1dSDaniel P. Berrange size_t i; 1044a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1045e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1046e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1047e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1048a721f53bSRichard W.M. Jones &local_err); 1049e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1050e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 10515217f188SMarkus Armbruster error_reportf_err(local_err, 10525217f188SMarkus Armbruster "Failed to use socket activation: "); 1053a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1054a721f53bSRichard W.M. Jones } 1055e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1056e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1057e4849c1dSDaniel P. Berrange } 1058a721f53bSRichard W.M. Jones } 105948bec07eSDaniel P. Berrange 1060f9734d5dSMarkus Armbruster qemu_init_main_loop(&error_fatal); 1061802ddc37SPaolo Bonzini bdrv_init(); 1062b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1063802ddc37SPaolo Bonzini 1064b18d72d7SDenis V. Lunev opts.srcpath = argv[optind]; 106577c9aaefSDaniel P. Berrange if (imageOpts) { 1066b18d72d7SDenis V. Lunev QemuOpts *o; 106777c9aaefSDaniel P. Berrange if (fmt) { 106877c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 106977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 107077c9aaefSDaniel P. Berrange } 1071b18d72d7SDenis V. Lunev o = qemu_opts_parse_noisily(&file_opts, opts.srcpath, true); 1072b18d72d7SDenis V. Lunev if (!o) { 107377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 107477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 107577c9aaefSDaniel P. Berrange } 1076b18d72d7SDenis V. Lunev options = qemu_opts_to_qdict(o, NULL); 107777c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1078efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 107977c9aaefSDaniel P. Berrange } else { 1080e6b63677SDaniel P. Berrange if (fmt) { 10814fbec260SMax Reitz options = qdict_new(); 108246f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1083e6b63677SDaniel P. Berrange } 1084b18d72d7SDenis V. Lunev blk = blk_new_open(opts.srcpath, NULL, options, flags, &local_err); 108577c9aaefSDaniel P. Berrange } 108677c9aaefSDaniel P. Berrange 10874fbec260SMax Reitz if (!blk) { 1088c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1089c29b77f9SMarkus Armbruster argv[optind]); 109085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1091802ddc37SPaolo Bonzini } 10924fbec260SMax Reitz bs = blk_bs(blk); 1093802ddc37SPaolo Bonzini 1094b57e4de0SKevin Wolf if (dev_offset) { 1095b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1096b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1097b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1098b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1099c6e0a6deSKevin Wolf 1100c6e0a6deSKevin Wolf aio_context_acquire(qemu_get_aio_context()); 1101b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1102c6e0a6deSKevin Wolf aio_context_release(qemu_get_aio_context()); 1103c6e0a6deSKevin Wolf 1104b57e4de0SKevin Wolf blk_remove_bs(blk); 1105b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1106b57e4de0SKevin Wolf bdrv_unref(bs); 1107b57e4de0SKevin Wolf } 1108b57e4de0SKevin Wolf 11096effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11106effd5bfSKevin Wolf 11118c116b0eSWenchao Xia if (sn_opts) { 11128c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11138c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11148c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11158c116b0eSWenchao Xia &local_err); 11168c116b0eSWenchao Xia } else if (sn_id_or_name) { 11178c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11188c116b0eSWenchao Xia &local_err); 11198c116b0eSWenchao Xia } 11208c116b0eSWenchao Xia if (ret < 0) { 1121c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 112285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11238c116b0eSWenchao Xia } 11248c116b0eSWenchao Xia 1125b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 1126802ddc37SPaolo Bonzini 1127a5fced40SEric Blake nbd_server_is_qemu_nbd(shared); 112800917172SKevin Wolf 112900917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 113000917172SKevin Wolf *export_opts = (BlockExportOptions) { 113100917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1132d53be9ceSKevin Wolf .id = g_strdup("qemu-nbd-export"), 1133b6076afcSKevin Wolf .node_name = g_strdup(bdrv_get_node_name(bs)), 113400917172SKevin Wolf .has_writethrough = true, 113500917172SKevin Wolf .writethrough = writethrough, 113630dbc81dSKevin Wolf .has_writable = true, 113730dbc81dSKevin Wolf .writable = !readonly, 113800917172SKevin Wolf .u.nbd = { 113900917172SKevin Wolf .name = g_strdup(export_name), 114000917172SKevin Wolf .description = g_strdup(export_description), 1141cbad81ceSEric Blake .has_bitmaps = !!bitmaps, 1142cbad81ceSEric Blake .bitmaps = bitmaps, 1143dbc7b014SEric Blake .has_allocation_depth = alloc_depth, 1144dbc7b014SEric Blake .allocation_depth = alloc_depth, 114500917172SKevin Wolf }, 114600917172SKevin Wolf }; 114700917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 114800917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 11493b05a8e9Sths 11503484f676SDenis V. Lunev if (opts.device) { 11513c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1152f1ef5555SPaolo Bonzini int ret; 115303b67621SDenis V. Lunev ret = pthread_create(&client_thread, NULL, nbd_client_thread, &opts); 1154f1ef5555SPaolo Bonzini if (ret != 0) { 115585b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 115685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1157f1ef5555SPaolo Bonzini } 11583c1fa35dSEric Blake #endif 1159f1ef5555SPaolo Bonzini } else { 1160f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1161f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1162f1ef5555SPaolo Bonzini } 1163f1ef5555SPaolo Bonzini 1164d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11657a5ca864Sbellard 1166637bc5a5SMax Reitz if (pid_file_name) { 1167637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1168637bc5a5SMax Reitz } 1169637bc5a5SMax Reitz 11709faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11719faf31b6SMichael Tokarev * to free any busy filesystems */ 11729faf31b6SMichael Tokarev if (chdir("/") < 0) { 117385b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 117485b01e09SMarkus Armbruster strerror(errno)); 117585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11769faf31b6SMichael Tokarev } 11779faf31b6SMichael Tokarev 11783484f676SDenis V. Lunev if (opts.fork_process) { 1179173776f7SDenis V. Lunev if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) { 1180b4bbdf51SDenis V. Lunev error_report("Could not release pipe to parent: %s", 1181173776f7SDenis V. Lunev strerror(errno)); 1182173776f7SDenis V. Lunev exit(EXIT_FAILURE); 1183173776f7SDenis V. Lunev } 1184ffb31e1dSMax Reitz } 1185ffb31e1dSMax Reitz 11867860a380SPaolo Bonzini state = RUNNING; 11873b05a8e9Sths do { 1188a61c6782SPaolo Bonzini main_loop_wait(false); 11897860a380SPaolo Bonzini if (state == TERMINATE) { 1190bc4ee65bSKevin Wolf blk_exp_close_all(); 1191d794f7f3SKevin Wolf state = TERMINATED; 11927860a380SPaolo Bonzini } 11937860a380SPaolo Bonzini } while (state != TERMINATED); 11942c8d9f06SPaolo Bonzini 119526f54e9aSMarkus Armbruster blk_unref(blk); 1196b32f6c28SPaolo Bonzini if (sockpath) { 1197b32f6c28SPaolo Bonzini unlink(sockpath); 1198b32f6c28SPaolo Bonzini } 11997a5ca864Sbellard 12008c116b0eSWenchao Xia qemu_opts_del(sn_opts); 12018c116b0eSWenchao Xia 12023484f676SDenis V. Lunev if (opts.device) { 1203a517e88bSPaolo Bonzini void *ret; 1204a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1205a517e88bSPaolo Bonzini exit(ret != NULL); 1206a517e88bSPaolo Bonzini } else { 1207a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1208a517e88bSPaolo Bonzini } 12097a5ca864Sbellard } 1210