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 27503b67621SDenis V. Lunev struct NbdClientOpts { 27603b67621SDenis V. Lunev char *device; 2775c56dd27SDenis V. Lunev bool fork_process; 27803b67621SDenis V. Lunev }; 27903b67621SDenis V. Lunev 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, 292d0d6ff58SDaniel P. Berrange saddr, 293d0d6ff58SDaniel P. Berrange &local_error) < 0) { 29448bec07eSDaniel P. Berrange error_report_err(local_error); 295a517e88bSPaolo Bonzini goto out; 296a517e88bSPaolo Bonzini } 297a517e88bSPaolo Bonzini 298af74b550SAlex Chen if (nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 299af74b550SAlex Chen NULL, NULL, NULL, &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 3215c56dd27SDenis V. Lunev if (verbose && !opts->fork_process) { 322a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 32303b67621SDenis V. Lunev opts->device, srcpath); 324c1f8fdc3SPaolo Bonzini } else { 325c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 326c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 327c1f8fdc3SPaolo Bonzini } 328a517e88bSPaolo Bonzini 329af74b550SAlex Chen if (nbd_client(fd) < 0) { 330af74b550SAlex Chen goto out; 331a517e88bSPaolo Bonzini } 332a517e88bSPaolo Bonzini 333af74b550SAlex Chen ret = EXIT_SUCCESS; 334af74b550SAlex Chen 335a517e88bSPaolo Bonzini out: 336af74b550SAlex Chen if (fd >= 0) { 337af74b550SAlex Chen close(fd); 338af74b550SAlex Chen } 339af74b550SAlex Chen object_unref(OBJECT(sioc)); 3406dc1667dSEric Blake g_free(info.name); 341a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 342af74b550SAlex Chen return (void *) (intptr_t) ret; 343cd831bd7Sths } 3443c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 345cd831bd7Sths 346e4afbf4fSFam Zheng static int nbd_can_accept(void) 347a61c6782SPaolo Bonzini { 3483dcf56e6SEric Blake return state == RUNNING && (shared == 0 || nb_fds < shared); 349a61c6782SPaolo Bonzini } 350a61c6782SPaolo Bonzini 351d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 352e4afbf4fSFam Zheng 3530c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 354a61c6782SPaolo Bonzini { 355a61c6782SPaolo Bonzini nb_fds--; 3560c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3577860a380SPaolo Bonzini state = TERMINATE; 3587860a380SPaolo Bonzini } 359d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3607860a380SPaolo Bonzini nbd_client_put(client); 361a61c6782SPaolo Bonzini } 362a61c6782SPaolo Bonzini 363e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 364e4849c1dSDaniel P. Berrange gpointer opaque) 365a61c6782SPaolo Bonzini { 3667860a380SPaolo Bonzini if (state >= TERMINATE) { 367e4849c1dSDaniel P. Berrange return; 3687860a380SPaolo Bonzini } 3697860a380SPaolo Bonzini 370a61c6782SPaolo Bonzini nb_fds++; 371d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 372b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 373d0d6ff58SDaniel P. Berrange } 374d0d6ff58SDaniel P. Berrange 375d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 376e4afbf4fSFam Zheng { 377e4afbf4fSFam Zheng if (nbd_can_accept()) { 378e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 379e4afbf4fSFam Zheng } else { 380e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 381e4afbf4fSFam Zheng } 382e4afbf4fSFam Zheng } 383e4afbf4fSFam Zheng 38448bec07eSDaniel P. Berrange 385bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 38648bec07eSDaniel P. Berrange const char *bindto, 38748bec07eSDaniel P. Berrange const char *port) 38848bec07eSDaniel P. Berrange { 389bd269ebcSMarkus Armbruster SocketAddress *saddr; 39048bec07eSDaniel P. Berrange 391bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 39248bec07eSDaniel P. Berrange if (sockpath) { 393bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 394bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 39548bec07eSDaniel P. Berrange } else { 3960399293eSEric Blake InetSocketAddress *inet; 397bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 398bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3990399293eSEric Blake inet->host = g_strdup(bindto); 40048bec07eSDaniel P. Berrange if (port) { 4010399293eSEric Blake inet->port = g_strdup(port); 40248bec07eSDaniel P. Berrange } else { 4030399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 40448bec07eSDaniel P. Berrange } 40548bec07eSDaniel P. Berrange } 40648bec07eSDaniel P. Berrange 40748bec07eSDaniel P. Berrange return saddr; 40848bec07eSDaniel P. Berrange } 40948bec07eSDaniel P. Berrange 41048bec07eSDaniel P. Berrange 41177c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 41277c9aaefSDaniel P. Berrange .name = "file", 41377c9aaefSDaniel P. Berrange .implied_opt_name = "file", 41477c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 41577c9aaefSDaniel P. Berrange .desc = { 41677c9aaefSDaniel P. Berrange /* no elements => accept any params */ 41777c9aaefSDaniel P. Berrange { /* end of list */ } 41877c9aaefSDaniel P. Berrange }, 41977c9aaefSDaniel P. Berrange }; 42077c9aaefSDaniel P. Berrange 42168b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 42268b96f15SEric Blake Error **errp) 423145614a1SDaniel P. Berrange { 424145614a1SDaniel P. Berrange Object *obj; 425145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 426145614a1SDaniel P. Berrange 427145614a1SDaniel P. Berrange obj = object_resolve_path_component( 428145614a1SDaniel P. Berrange object_get_objects_root(), id); 429145614a1SDaniel P. Berrange if (!obj) { 430145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 431145614a1SDaniel P. Berrange id); 432145614a1SDaniel P. Berrange return NULL; 433145614a1SDaniel P. Berrange } 434145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 435145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 436145614a1SDaniel P. Berrange if (!creds) { 437145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 438145614a1SDaniel P. Berrange id); 439145614a1SDaniel P. Berrange return NULL; 440145614a1SDaniel P. Berrange } 441145614a1SDaniel P. Berrange 4420279cd95SPhilippe Mathieu-Daudé if (!qcrypto_tls_creds_check_endpoint(creds, 4430279cd95SPhilippe Mathieu-Daudé list 4440279cd95SPhilippe Mathieu-Daudé ? QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT 4450279cd95SPhilippe Mathieu-Daudé : QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4460279cd95SPhilippe Mathieu-Daudé errp)) { 44768b96f15SEric Blake return NULL; 44868b96f15SEric Blake } 449145614a1SDaniel P. Berrange object_ref(obj); 450145614a1SDaniel P. Berrange return creds; 451145614a1SDaniel P. Berrange } 452145614a1SDaniel P. Berrange 453a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 454a721f53bSRichard W.M. Jones { 455a721f53bSRichard W.M. Jones if (*address == NULL) { 456a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 457a721f53bSRichard W.M. Jones } 458a721f53bSRichard W.M. Jones 459a721f53bSRichard W.M. Jones if (*port == NULL) { 460a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 461a721f53bSRichard W.M. Jones } 462a721f53bSRichard W.M. Jones } 463a721f53bSRichard W.M. Jones 464a721f53bSRichard W.M. Jones /* 465a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 466a721f53bSRichard W.M. Jones */ 467a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 468a721f53bSRichard W.M. Jones const char *sockpath, 469a721f53bSRichard W.M. Jones const char *address, 47068b96f15SEric Blake const char *port, 4713d212b41SRichard W.M. Jones const char *selinux, 47268b96f15SEric Blake bool list) 473a721f53bSRichard W.M. Jones { 474a721f53bSRichard W.M. Jones if (device != NULL) { 475a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 476a721f53bSRichard W.M. Jones } 477a721f53bSRichard W.M. Jones 478a721f53bSRichard W.M. Jones if (sockpath != NULL) { 479a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 480a721f53bSRichard W.M. Jones } 481a721f53bSRichard W.M. Jones 482a721f53bSRichard W.M. Jones if (address != NULL) { 483a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 484a721f53bSRichard W.M. Jones } 485a721f53bSRichard W.M. Jones 486a721f53bSRichard W.M. Jones if (port != NULL) { 487a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 488a721f53bSRichard W.M. Jones } 489a721f53bSRichard W.M. Jones 4903d212b41SRichard W.M. Jones if (selinux != NULL) { 4913d212b41SRichard W.M. Jones return "SELinux label can't be set when using socket activation"; 4923d212b41SRichard W.M. Jones } 4933d212b41SRichard W.M. Jones 49468b96f15SEric Blake if (list) { 49568b96f15SEric Blake return "List mode is incompatible with socket activation"; 49668b96f15SEric Blake } 49768b96f15SEric Blake 498a721f53bSRichard W.M. Jones return NULL; 499a721f53bSRichard W.M. Jones } 500145614a1SDaniel P. Berrange 501b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 502b3b5299dSKevin Wolf { 503b3b5299dSKevin Wolf job_cancel_sync_all(); 5041895b977SSergio Lopez blk_exp_close_all(); 505b3b5299dSKevin Wolf bdrv_close_all(); 506b3b5299dSKevin Wolf } 507b3b5299dSKevin Wolf 5087a5ca864Sbellard int main(int argc, char **argv) 5097a5ca864Sbellard { 51026f54e9aSMarkus Armbruster BlockBackend *blk; 5117a5ca864Sbellard BlockDriverState *bs; 5129d26dfcbSEric Blake uint64_t dev_offset = 0; 513dbb38caaSEric Blake bool readonly = false; 514cd831bd7Sths bool disconnect = false; 515a721f53bSRichard W.M. Jones const char *bindto = NULL; 51648bec07eSDaniel P. Berrange const char *port = NULL; 51748bec07eSDaniel P. Berrange char *sockpath = NULL; 518a6ac2313SPaolo Bonzini char *device = NULL; 5198c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5208c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 521dbc7b014SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:AB:L"; 5227a5ca864Sbellard struct option lopt[] = { 523aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 524aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 525aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 526aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 527aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 528aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 529aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 530dbc7b014SEric Blake { "allocation-depth", no_argument, NULL, 'A' }, 531636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 532aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 533aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 53468b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 535aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 536aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 537aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 538aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 539aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 540aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 541aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 542aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 543aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 544aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 545aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 546aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 547aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 548aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 549b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 550aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 551003b2b25SDaniel P. Berrangé { "tls-hostname", required_argument, NULL, QEMU_NBD_OPT_TLSHOSTNAME }, 552b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 553aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 55439ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 555ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 556637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 5573d212b41SRichard W.M. Jones { "selinux-label", required_argument, NULL, 5583d212b41SRichard W.M. Jones QEMU_NBD_OPT_SELINUX_LABEL }, 559660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5607a5ca864Sbellard }; 5617a5ca864Sbellard int ch; 5627a5ca864Sbellard int opt_ind = 0; 563f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5644fbec260SMax Reitz int ret = 0; 56539a5235cSPaolo Bonzini bool seen_cache = false; 566ded9d2d5SPaolo Bonzini bool seen_discard = false; 56739a5235cSPaolo Bonzini bool seen_aio = false; 568a517e88bSPaolo Bonzini pthread_t client_thread; 569e6b63677SDaniel P. Berrange const char *fmt = NULL; 57034b5d2c6SMax Reitz Error *local_err = NULL; 571b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5724fbec260SMax Reitz QDict *options = NULL; 57368b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 574b1a75b33SEric Blake const char *export_description = NULL; 575e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStrList *bitmaps = NULL; 576dbc7b014SEric Blake bool alloc_depth = false; 577145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 578003b2b25SDaniel P. Berrangé const char *tlshostname = NULL; 57977c9aaefSDaniel P. Berrange bool imageOpts = false; 58009615257SNir Soffer bool writethrough = false; /* Client will flush as needed. */ 581ffb31e1dSMax Reitz bool fork_process = false; 58268b96f15SEric Blake bool list = false; 583a721f53bSRichard W.M. Jones unsigned socket_activation; 584637bc5a5SMax Reitz const char *pid_file_name = NULL; 5853d212b41SRichard W.M. Jones const char *selinux_label = NULL; 58600917172SKevin Wolf BlockExportOptions *export_opts; 5877a5ca864Sbellard 588029a88c9SEric Blake #ifdef CONFIG_POSIX 589cbc20bfbSStefan Hajnoczi os_setup_early_signal_handling(); 590cbc20bfbSStefan Hajnoczi os_setup_signal_handling(); 591041e32b8SMax Reitz #endif 592041e32b8SMax Reitz 59398c5d2e7SDaniel P. Berrangé socket_init(); 594f5852efaSChristophe Fergeau error_init(argv[0]); 595fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 596e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 597c2297088SDaniel P. Berrange 5980ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 59939ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 60010f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 601bb345110SPaolo Bonzini 6027a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6037a5ca864Sbellard switch (ch) { 6047a5ca864Sbellard case 's': 6052f726488Sths flags |= BDRV_O_SNAPSHOT; 6062f726488Sths break; 6072f726488Sths case 'n': 60839a5235cSPaolo Bonzini optarg = (char *) "none"; 60939a5235cSPaolo Bonzini /* fallthrough */ 61039a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 61139a5235cSPaolo Bonzini if (seen_cache) { 61285b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 61385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61439a5235cSPaolo Bonzini } 61539a5235cSPaolo Bonzini seen_cache = true; 6166effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 61785b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 61885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61939a5235cSPaolo Bonzini } 6207a5ca864Sbellard break; 62139a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 62239a5235cSPaolo Bonzini if (seen_aio) { 62385b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 62485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62539a5235cSPaolo Bonzini } 62639a5235cSPaolo Bonzini seen_aio = true; 6277680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6287680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 62985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 63039a5235cSPaolo Bonzini } 63139a5235cSPaolo Bonzini break; 632ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 633ded9d2d5SPaolo Bonzini if (seen_discard) { 63485b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 63585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 636ded9d2d5SPaolo Bonzini } 637ded9d2d5SPaolo Bonzini seen_discard = true; 638ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 63985b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 64085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 641ded9d2d5SPaolo Bonzini } 642ded9d2d5SPaolo Bonzini break; 643b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 644b3838a40SPeter Lieven detect_zeroes = 645f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 646b3838a40SPeter Lieven optarg, 647b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 648b3838a40SPeter Lieven &local_err); 649b3838a40SPeter Lieven if (local_err) { 650c29b77f9SMarkus Armbruster error_reportf_err(local_err, 651c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 65285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 653b3838a40SPeter Lieven } 654b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 655b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 65685b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 657b3838a40SPeter Lieven "without setting discard operation to unmap"); 65885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 659b3838a40SPeter Lieven } 660b3838a40SPeter Lieven break; 6617a5ca864Sbellard case 'b': 6627a5ca864Sbellard bindto = optarg; 6637a5ca864Sbellard break; 6647a5ca864Sbellard case 'p': 66548bec07eSDaniel P. Berrange port = optarg; 6667a5ca864Sbellard break; 6677a5ca864Sbellard case 'o': 66843b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 66943b51011SEric Blake error_report("Invalid offset '%s'", optarg); 67085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6717a5ca864Sbellard } 6727a5ca864Sbellard break; 6738c116b0eSWenchao Xia case 'l': 6748c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 67570b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 67670b94331SMarkus Armbruster optarg, false); 6778c116b0eSWenchao Xia if (!sn_opts) { 67885b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6798c116b0eSWenchao Xia optarg); 68085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6818c116b0eSWenchao Xia } 6828c116b0eSWenchao Xia } else { 6838c116b0eSWenchao Xia sn_id_or_name = optarg; 6848c116b0eSWenchao Xia } 6858c116b0eSWenchao Xia /* fall through */ 6867a5ca864Sbellard case 'r': 687dbb38caaSEric Blake readonly = true; 68807108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6897a5ca864Sbellard break; 690dbc7b014SEric Blake case 'A': 691dbc7b014SEric Blake alloc_depth = true; 692dbc7b014SEric Blake break; 693636192c4SEric Blake case 'B': 694e5fb29d5SVladimir Sementsov-Ogievskiy { 695e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStr *el = g_new(BlockDirtyBitmapOrStr, 1); 696e5fb29d5SVladimir Sementsov-Ogievskiy *el = (BlockDirtyBitmapOrStr) { 697e5fb29d5SVladimir Sementsov-Ogievskiy .type = QTYPE_QSTRING, 698e5fb29d5SVladimir Sementsov-Ogievskiy .u.local = g_strdup(optarg), 699e5fb29d5SVladimir Sementsov-Ogievskiy }; 700e5fb29d5SVladimir Sementsov-Ogievskiy QAPI_LIST_PREPEND(bitmaps, el); 701e5fb29d5SVladimir Sementsov-Ogievskiy } 702636192c4SEric Blake break; 703cd831bd7Sths case 'k': 704b32f6c28SPaolo Bonzini sockpath = optarg; 705713cc671SPeter Lieven if (sockpath[0] != '/') { 7069af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 70785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 708713cc671SPeter Lieven } 709cd831bd7Sths break; 710cd831bd7Sths case 'd': 711cd831bd7Sths disconnect = true; 712cd831bd7Sths break; 713cd831bd7Sths case 'c': 714cd831bd7Sths device = optarg; 715cd831bd7Sths break; 7163b05a8e9Sths case 'e': 71743b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 7183dcf56e6SEric Blake shared < 0) { 71985b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 72085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7213b05a8e9Sths } 7223b05a8e9Sths break; 723e6b63677SDaniel P. Berrange case 'f': 724e6b63677SDaniel P. Berrange fmt = optarg; 725e6b63677SDaniel P. Berrange break; 72675818250Sths case 't': 72775818250Sths persistent = 1; 72875818250Sths break; 7293d4b2f9cSDaniel P. Berrange case 'x': 7303d4b2f9cSDaniel P. Berrange export_name = optarg; 73193676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 73293676c88SEric Blake error_report("export name '%s' too long", export_name); 73393676c88SEric Blake exit(EXIT_FAILURE); 73493676c88SEric Blake } 7353d4b2f9cSDaniel P. Berrange break; 736b1a75b33SEric Blake case 'D': 737b1a75b33SEric Blake export_description = optarg; 73893676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 73993676c88SEric Blake error_report("export description '%s' too long", 74093676c88SEric Blake export_description); 74193676c88SEric Blake exit(EXIT_FAILURE); 74293676c88SEric Blake } 743b1a75b33SEric Blake break; 7447a5ca864Sbellard case 'v': 7457a5ca864Sbellard verbose = 1; 7467a5ca864Sbellard break; 7477a5ca864Sbellard case 'V': 7487a5ca864Sbellard version(argv[0]); 7497a5ca864Sbellard exit(0); 7507a5ca864Sbellard break; 7517a5ca864Sbellard case 'h': 7527a5ca864Sbellard usage(argv[0]); 7537a5ca864Sbellard exit(0); 7547a5ca864Sbellard break; 7557a5ca864Sbellard case '?': 75685b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 75785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 758fa40e43cSKevin Wolf case QEMU_NBD_OPT_OBJECT: 759fa40e43cSKevin Wolf user_creatable_process_cmdline(optarg); 760fa40e43cSKevin Wolf break; 761145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 762145614a1SDaniel P. Berrange tlscredsid = optarg; 763145614a1SDaniel P. Berrange break; 764003b2b25SDaniel P. Berrangé case QEMU_NBD_OPT_TLSHOSTNAME: 765003b2b25SDaniel P. Berrangé tlshostname = optarg; 766003b2b25SDaniel P. Berrangé break; 76777c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76877c9aaefSDaniel P. Berrange imageOpts = true; 76977c9aaefSDaniel P. Berrange break; 77039ca463eSDenis V. Lunev case 'T': 77192eecfffSPaolo Bonzini trace_opt_parse(optarg); 77239ca463eSDenis V. Lunev break; 773b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 774b25e12daSDaniel P. Berrange tlsauthz = optarg; 775b25e12daSDaniel P. Berrange break; 776ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 777ffb31e1dSMax Reitz fork_process = true; 778ffb31e1dSMax Reitz break; 77968b96f15SEric Blake case 'L': 78068b96f15SEric Blake list = true; 78168b96f15SEric Blake break; 782637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 783637bc5a5SMax Reitz pid_file_name = optarg; 784637bc5a5SMax Reitz break; 7853d212b41SRichard W.M. Jones case QEMU_NBD_OPT_SELINUX_LABEL: 7863d212b41SRichard W.M. Jones selinux_label = optarg; 7873d212b41SRichard W.M. Jones break; 7887a5ca864Sbellard } 7897a5ca864Sbellard } 7907a5ca864Sbellard 79168b96f15SEric Blake if (list) { 79268b96f15SEric Blake if (argc != optind) { 79368b96f15SEric Blake error_report("List mode is incompatible with a file name"); 79468b96f15SEric Blake exit(EXIT_FAILURE); 79568b96f15SEric Blake } 7960bc16997SEric Blake if (export_name || export_description || dev_offset || 797cbad81ceSEric Blake device || disconnect || fmt || sn_id_or_name || bitmaps || 798dbc7b014SEric Blake alloc_depth || seen_aio || seen_discard || seen_cache) { 79968b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 80068b96f15SEric Blake exit(EXIT_FAILURE); 80168b96f15SEric Blake } 80268b96f15SEric Blake if (fork_process) { 80368b96f15SEric Blake error_report("List mode is incompatible with forking"); 80468b96f15SEric Blake exit(EXIT_FAILURE); 80568b96f15SEric Blake } 80668b96f15SEric Blake } else if ((argc - optind) != 1) { 807433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 808433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 80985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 81068b96f15SEric Blake } else if (!export_name) { 81168b96f15SEric Blake export_name = ""; 8127a5ca864Sbellard } 8137a5ca864Sbellard 81439ca463eSDenis V. Lunev if (!trace_init_backends()) { 81539ca463eSDenis V. Lunev exit(1); 81639ca463eSDenis V. Lunev } 81792eecfffSPaolo Bonzini trace_init_file(); 818c5955f4fSRichard Henderson qemu_set_log(LOG_TRACE, &error_fatal); 81939ca463eSDenis V. Lunev 820a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 821a721f53bSRichard W.M. Jones if (socket_activation == 0) { 822e8ae8b1aSDaniel P. Berrangé if (!sockpath) { 823a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 824e8ae8b1aSDaniel P. Berrangé } 825a721f53bSRichard W.M. Jones } else { 826a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 827a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 82868b96f15SEric Blake bindto, port, 8293d212b41SRichard W.M. Jones selinux_label, 83068b96f15SEric Blake list); 831a721f53bSRichard W.M. Jones if (err_msg != NULL) { 832a721f53bSRichard W.M. Jones error_report("%s", err_msg); 833a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 834a721f53bSRichard W.M. Jones } 83553fabd4bSPaolo Bonzini 83653fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 83753fabd4bSPaolo Bonzini if (socket_activation > 1) { 83853fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 83953fabd4bSPaolo Bonzini "LISTEN_FDS"); 84053fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 84153fabd4bSPaolo Bonzini } 842a721f53bSRichard W.M. Jones } 843a721f53bSRichard W.M. Jones 844145614a1SDaniel P. Berrange if (tlscredsid) { 845145614a1SDaniel P. Berrange if (device) { 846145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 847145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 848145614a1SDaniel P. Berrange } 849b25e12daSDaniel P. Berrange if (tlsauthz && list) { 850b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 851b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 852b25e12daSDaniel P. Berrange } 853003b2b25SDaniel P. Berrangé if (tlshostname && !list) { 854003b2b25SDaniel P. Berrangé error_report("TLS hostname is only supported with export list"); 855003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 856003b2b25SDaniel P. Berrangé } 85768b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 858145614a1SDaniel P. Berrange if (local_err) { 8595217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 860145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 861145614a1SDaniel P. Berrange } 862b25e12daSDaniel P. Berrange } else { 863b25e12daSDaniel P. Berrange if (tlsauthz) { 864b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 865b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 866b25e12daSDaniel P. Berrange } 867003b2b25SDaniel P. Berrangé if (tlshostname) { 868003b2b25SDaniel P. Berrangé error_report("--tls-hostname is not permitted without --tls-creds"); 869003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 870003b2b25SDaniel P. Berrangé } 871145614a1SDaniel P. Berrange } 872145614a1SDaniel P. Berrange 8733d212b41SRichard W.M. Jones if (selinux_label) { 8743d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 8753d212b41SRichard W.M. Jones if (sockpath == NULL && device == NULL) { 8763d212b41SRichard W.M. Jones error_report("--selinux-label is not permitted without --socket"); 8773d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8783d212b41SRichard W.M. Jones } 8793d212b41SRichard W.M. Jones #else 8803d212b41SRichard W.M. Jones error_report("SELinux support not enabled in this binary"); 8813d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 8823d212b41SRichard W.M. Jones #endif 8833d212b41SRichard W.M. Jones } 8843d212b41SRichard W.M. Jones 88568b96f15SEric Blake if (list) { 88668b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 887003b2b25SDaniel P. Berrangé return qemu_nbd_client_list(saddr, tlscreds, 888003b2b25SDaniel P. Berrangé tlshostname ? tlshostname : bindto); 88968b96f15SEric Blake } 89068b96f15SEric Blake 8913c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8923c1fa35dSEric Blake if (disconnect || device) { 8933c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8943c1fa35dSEric Blake exit(EXIT_FAILURE); 8953c1fa35dSEric Blake } 8963c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 897cd831bd7Sths if (disconnect) { 898d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 899d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 90085b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 90185b01e09SMarkus Armbruster strerror(errno)); 90285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 903fc19f8a0SPaolo Bonzini } 904d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 905cd831bd7Sths 906d0d6ff58SDaniel P. Berrange close(nbdfd); 907cd831bd7Sths 908cd831bd7Sths printf("%s disconnected\n", argv[optind]); 909cd831bd7Sths 910cd831bd7Sths return 0; 911cd831bd7Sths } 9123c1fa35dSEric Blake #endif 913cd831bd7Sths 914ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 915eb705985SDaniel P. Berrangé #ifndef WIN32 916a7241974SMarc-André Lureau g_autoptr(GError) err = NULL; 917c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 918c1f8fdc3SPaolo Bonzini pid_t pid; 919c1f8fdc3SPaolo Bonzini int ret; 920c1f8fdc3SPaolo Bonzini 921a7241974SMarc-André Lureau if (!g_unix_open_pipe(stderr_fd, FD_CLOEXEC, &err)) { 92285b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 923a7241974SMarc-André Lureau err->message); 92485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 925c1f8fdc3SPaolo Bonzini } 926c1f8fdc3SPaolo Bonzini 927c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 928c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 929c1f8fdc3SPaolo Bonzini */ 930c1f8fdc3SPaolo Bonzini pid = fork(); 93170d4739eSMax Reitz if (pid < 0) { 93285b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 93385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 93470d4739eSMax Reitz } else if (pid == 0) { 9351dc82151SDenis V. Lunev int saved_errno; 9361dc82151SDenis V. Lunev 937c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 938e6df58a5SMax Reitz 9399faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 9401dc82151SDenis V. Lunev saved_errno = errno; /* dup2 will overwrite error below */ 941c1f8fdc3SPaolo Bonzini 942c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 943e0892cedSDenis V. Lunev if (dup2(stderr_fd[1], STDERR_FILENO) < 0) { 944e0892cedSDenis V. Lunev char str[256]; 945e0892cedSDenis V. Lunev snprintf(str, sizeof(str), 946e0892cedSDenis V. Lunev "%s: Failed to link stderr to the pipe: %s\n", 947e0892cedSDenis V. Lunev g_get_prgname(), strerror(errno)); 948e0892cedSDenis V. Lunev /* 949e0892cedSDenis V. Lunev * We are unable to use error_report() here as we need to get 950e0892cedSDenis V. Lunev * stderr pointed to the parent's pipe. Write to that pipe 951e0892cedSDenis V. Lunev * manually. 952e0892cedSDenis V. Lunev */ 953e0892cedSDenis V. Lunev ret = write(stderr_fd[1], str, strlen(str)); 954e0892cedSDenis V. Lunev exit(EXIT_FAILURE); 955e0892cedSDenis V. Lunev } 956e0892cedSDenis V. Lunev 957fc19f8a0SPaolo Bonzini if (ret < 0) { 9581dc82151SDenis V. Lunev error_report("Failed to daemonize: %s", strerror(saved_errno)); 95985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 960c1f8fdc3SPaolo Bonzini } 961c1f8fdc3SPaolo Bonzini 962c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 963c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 964c1f8fdc3SPaolo Bonzini } else { 965c1f8fdc3SPaolo Bonzini bool errors = false; 966c1f8fdc3SPaolo Bonzini char *buf; 967c1f8fdc3SPaolo Bonzini 968c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 969c1f8fdc3SPaolo Bonzini * it closes the pipe. 970c1f8fdc3SPaolo Bonzini */ 971c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 972c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 973c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 974c1f8fdc3SPaolo Bonzini errors = true; 975c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 976fc19f8a0SPaolo Bonzini if (ret < 0) { 977c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 978c1f8fdc3SPaolo Bonzini } 979c1f8fdc3SPaolo Bonzini } 980fc19f8a0SPaolo Bonzini if (ret < 0) { 98185b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 98285b01e09SMarkus Armbruster strerror(errno)); 98385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 984c1f8fdc3SPaolo Bonzini } 985c1f8fdc3SPaolo Bonzini 986c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 987c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 988c1f8fdc3SPaolo Bonzini */ 989c1f8fdc3SPaolo Bonzini exit(errors); 990c1f8fdc3SPaolo Bonzini } 991eb705985SDaniel P. Berrangé #else /* WIN32 */ 992eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 993eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 994eb705985SDaniel P. Berrangé #endif /* WIN32 */ 995c1f8fdc3SPaolo Bonzini } 996c1f8fdc3SPaolo Bonzini 997a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 998b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 999b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 1000cd831bd7Sths } 1001cd831bd7Sths 1002e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1003a721f53bSRichard W.M. Jones if (socket_activation == 0) { 1004582d4210SEric Blake int backlog; 1005582d4210SEric Blake 10063dcf56e6SEric Blake if (persistent || shared == 0) { 1007582d4210SEric Blake backlog = SOMAXCONN; 1008582d4210SEric Blake } else { 1009582d4210SEric Blake backlog = MIN(shared, SOMAXCONN); 1010582d4210SEric Blake } 10113d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10123d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(selinux_label) == -1) { 10133d212b41SRichard W.M. Jones error_report("Cannot set SELinux socket create context to %s: %s", 10143d212b41SRichard W.M. Jones selinux_label, strerror(errno)); 10153d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10163d212b41SRichard W.M. Jones } 10173d212b41SRichard W.M. Jones #endif 101848bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 1019582d4210SEric Blake if (qio_net_listener_open_sync(server, saddr, backlog, 1020582d4210SEric Blake &local_err) < 0) { 1021e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1022a721f53bSRichard W.M. Jones error_report_err(local_err); 1023e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1024a721f53bSRichard W.M. Jones } 10253d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10263d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(NULL) == -1) { 10273d212b41SRichard W.M. Jones error_report("Cannot clear SELinux socket create context: %s", 10283d212b41SRichard W.M. Jones strerror(errno)); 10293d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10303d212b41SRichard W.M. Jones } 10313d212b41SRichard W.M. Jones #endif 1032a721f53bSRichard W.M. Jones } else { 1033e4849c1dSDaniel P. Berrange size_t i; 1034a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1035e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1036e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1037e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1038a721f53bSRichard W.M. Jones &local_err); 1039e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1040e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 10415217f188SMarkus Armbruster error_reportf_err(local_err, 10425217f188SMarkus Armbruster "Failed to use socket activation: "); 1043a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1044a721f53bSRichard W.M. Jones } 1045e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1046e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1047e4849c1dSDaniel P. Berrange } 1048a721f53bSRichard W.M. Jones } 104948bec07eSDaniel P. Berrange 1050f9734d5dSMarkus Armbruster qemu_init_main_loop(&error_fatal); 1051802ddc37SPaolo Bonzini bdrv_init(); 1052b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1053802ddc37SPaolo Bonzini 105477c9aaefSDaniel P. Berrange srcpath = argv[optind]; 105577c9aaefSDaniel P. Berrange if (imageOpts) { 105677c9aaefSDaniel P. Berrange QemuOpts *opts; 105777c9aaefSDaniel P. Berrange if (fmt) { 105877c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 105977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 106077c9aaefSDaniel P. Berrange } 106177c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 106277c9aaefSDaniel P. Berrange if (!opts) { 106377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 106477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 106577c9aaefSDaniel P. Berrange } 106677c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 106777c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1068efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 106977c9aaefSDaniel P. Berrange } else { 1070e6b63677SDaniel P. Berrange if (fmt) { 10714fbec260SMax Reitz options = qdict_new(); 107246f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1073e6b63677SDaniel P. Berrange } 1074efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 107577c9aaefSDaniel P. Berrange } 107677c9aaefSDaniel P. Berrange 10774fbec260SMax Reitz if (!blk) { 1078c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1079c29b77f9SMarkus Armbruster argv[optind]); 108085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1081802ddc37SPaolo Bonzini } 10824fbec260SMax Reitz bs = blk_bs(blk); 1083802ddc37SPaolo Bonzini 1084b57e4de0SKevin Wolf if (dev_offset) { 1085b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1086b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1087b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1088b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1089c6e0a6deSKevin Wolf 1090c6e0a6deSKevin Wolf aio_context_acquire(qemu_get_aio_context()); 1091b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1092c6e0a6deSKevin Wolf aio_context_release(qemu_get_aio_context()); 1093c6e0a6deSKevin Wolf 1094b57e4de0SKevin Wolf blk_remove_bs(blk); 1095b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1096b57e4de0SKevin Wolf bdrv_unref(bs); 1097b57e4de0SKevin Wolf } 1098b57e4de0SKevin Wolf 10996effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11006effd5bfSKevin Wolf 11018c116b0eSWenchao Xia if (sn_opts) { 11028c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11038c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11048c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11058c116b0eSWenchao Xia &local_err); 11068c116b0eSWenchao Xia } else if (sn_id_or_name) { 11078c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11088c116b0eSWenchao Xia &local_err); 11098c116b0eSWenchao Xia } 11108c116b0eSWenchao Xia if (ret < 0) { 1111c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 111285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11138c116b0eSWenchao Xia } 11148c116b0eSWenchao Xia 1115b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 1116802ddc37SPaolo Bonzini 1117a5fced40SEric Blake nbd_server_is_qemu_nbd(shared); 111800917172SKevin Wolf 111900917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 112000917172SKevin Wolf *export_opts = (BlockExportOptions) { 112100917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1122d53be9ceSKevin Wolf .id = g_strdup("qemu-nbd-export"), 1123b6076afcSKevin Wolf .node_name = g_strdup(bdrv_get_node_name(bs)), 112400917172SKevin Wolf .has_writethrough = true, 112500917172SKevin Wolf .writethrough = writethrough, 112630dbc81dSKevin Wolf .has_writable = true, 112730dbc81dSKevin Wolf .writable = !readonly, 112800917172SKevin Wolf .u.nbd = { 112900917172SKevin Wolf .name = g_strdup(export_name), 113000917172SKevin Wolf .description = g_strdup(export_description), 1131cbad81ceSEric Blake .has_bitmaps = !!bitmaps, 1132cbad81ceSEric Blake .bitmaps = bitmaps, 1133dbc7b014SEric Blake .has_allocation_depth = alloc_depth, 1134dbc7b014SEric Blake .allocation_depth = alloc_depth, 113500917172SKevin Wolf }, 113600917172SKevin Wolf }; 113700917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 113800917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 11393b05a8e9Sths 1140f1ef5555SPaolo Bonzini if (device) { 11413c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1142f1ef5555SPaolo Bonzini int ret; 114303b67621SDenis V. Lunev struct NbdClientOpts opts = { 114403b67621SDenis V. Lunev .device = device, 11455c56dd27SDenis V. Lunev .fork_process = fork_process, 114603b67621SDenis V. Lunev }; 1147f1ef5555SPaolo Bonzini 114803b67621SDenis V. Lunev ret = pthread_create(&client_thread, NULL, nbd_client_thread, &opts); 1149f1ef5555SPaolo Bonzini if (ret != 0) { 115085b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 115185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1152f1ef5555SPaolo Bonzini } 11533c1fa35dSEric Blake #endif 1154f1ef5555SPaolo Bonzini } else { 1155f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1156f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1157f1ef5555SPaolo Bonzini } 1158f1ef5555SPaolo Bonzini 1159d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11607a5ca864Sbellard 1161637bc5a5SMax Reitz if (pid_file_name) { 1162637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1163637bc5a5SMax Reitz } 1164637bc5a5SMax Reitz 11659faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11669faf31b6SMichael Tokarev * to free any busy filesystems */ 11679faf31b6SMichael Tokarev if (chdir("/") < 0) { 116885b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 116985b01e09SMarkus Armbruster strerror(errno)); 117085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11719faf31b6SMichael Tokarev } 11729faf31b6SMichael Tokarev 1173ffb31e1dSMax Reitz if (fork_process) { 11745c56dd27SDenis V. Lunev dup2(STDOUT_FILENO, STDERR_FILENO); 1175ffb31e1dSMax Reitz } 1176ffb31e1dSMax Reitz 11777860a380SPaolo Bonzini state = RUNNING; 11783b05a8e9Sths do { 1179a61c6782SPaolo Bonzini main_loop_wait(false); 11807860a380SPaolo Bonzini if (state == TERMINATE) { 1181bc4ee65bSKevin Wolf blk_exp_close_all(); 1182d794f7f3SKevin Wolf state = TERMINATED; 11837860a380SPaolo Bonzini } 11847860a380SPaolo Bonzini } while (state != TERMINATED); 11852c8d9f06SPaolo Bonzini 118626f54e9aSMarkus Armbruster blk_unref(blk); 1187b32f6c28SPaolo Bonzini if (sockpath) { 1188b32f6c28SPaolo Bonzini unlink(sockpath); 1189b32f6c28SPaolo Bonzini } 11907a5ca864Sbellard 11918c116b0eSWenchao Xia qemu_opts_del(sn_opts); 11928c116b0eSWenchao Xia 1193a517e88bSPaolo Bonzini if (device) { 1194a517e88bSPaolo Bonzini void *ret; 1195a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1196a517e88bSPaolo Bonzini exit(ret != NULL); 1197a517e88bSPaolo Bonzini } else { 1198a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1199a517e88bSPaolo Bonzini } 12007a5ca864Sbellard } 1201