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", 2222dcbb11bSEric Blake [NBD_FLAG_BLOCK_STAT_PAYLOAD_BIT] = "block-status-payload", 223c4e2aff8SMax Reitz }; 224c4e2aff8SMax Reitz 22568b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 22668b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 227c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 228c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 229c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 23068b96f15SEric Blake } 23168b96f15SEric Blake } 23268b96f15SEric Blake printf(" )\n"); 23368b96f15SEric Blake } 23468b96f15SEric Blake if (list[i].min_block) { 23568b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 23668b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 23768b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 23868b96f15SEric Blake } 23956cf9d04SEric Blake printf(" transaction size: %s\n", 24056cf9d04SEric Blake list[i].mode >= NBD_MODE_EXTENDED ? 24156cf9d04SEric Blake "64-bit" : "32-bit"); 24268b96f15SEric Blake if (list[i].n_contexts) { 24368b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 24468b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 24568b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 24668b96f15SEric Blake } 24768b96f15SEric Blake } 24868b96f15SEric Blake } 24968b96f15SEric Blake nbd_free_export_list(list, rc); 25068b96f15SEric Blake 25168b96f15SEric Blake ret = EXIT_SUCCESS; 25268b96f15SEric Blake out: 25368b96f15SEric Blake object_unref(OBJECT(sioc)); 25468b96f15SEric Blake return ret; 25568b96f15SEric Blake } 25668b96f15SEric Blake 25768b96f15SEric Blake 2583484f676SDenis V. Lunev struct NbdClientOpts { 2593484f676SDenis V. Lunev char *device; 260b18d72d7SDenis V. Lunev char *srcpath; 261b2cecdfeSDenis V. Lunev SocketAddress *saddr; 262f6f4620cSDenis V. Lunev int old_stderr; 2633484f676SDenis V. Lunev bool fork_process; 2643484f676SDenis V. Lunev bool verbose; 2653484f676SDenis V. Lunev }; 2663484f676SDenis V. Lunev 267f6f4620cSDenis V. Lunev static void nbd_client_release_pipe(int old_stderr) 2682eb7c2abSDenis V. Lunev { 2692eb7c2abSDenis V. Lunev /* Close stderr so that the qemu-nbd process exits. */ 270f6f4620cSDenis V. Lunev if (dup2(old_stderr, STDERR_FILENO) < 0) { 2712eb7c2abSDenis V. Lunev error_report("Could not release pipe to parent: %s", 2722eb7c2abSDenis V. Lunev strerror(errno)); 2732eb7c2abSDenis V. Lunev exit(EXIT_FAILURE); 2742eb7c2abSDenis V. Lunev } 275f6f4620cSDenis V. Lunev if (old_stderr != STDOUT_FILENO && close(old_stderr) < 0) { 276f6f4620cSDenis V. Lunev error_report("Could not release qemu-nbd: %s", strerror(errno)); 277f6f4620cSDenis V. Lunev exit(EXIT_FAILURE); 278f6f4620cSDenis V. Lunev } 2792eb7c2abSDenis V. Lunev } 2802eb7c2abSDenis V. Lunev 2813c1fa35dSEric Blake #if HAVE_NBD_DEVICE 282a517e88bSPaolo Bonzini static void *show_parts(void *arg) 283cd831bd7Sths { 284a6ac2313SPaolo Bonzini char *device = arg; 285cd831bd7Sths int nbd; 286cd831bd7Sths 287cd831bd7Sths /* linux just needs an open() to trigger 288cd831bd7Sths * the partition table update 289cd831bd7Sths * but remember to load the module with max_part != 0 : 290cd831bd7Sths * modprobe nbd max_part=63 291cd831bd7Sths */ 292cd831bd7Sths nbd = open(device, O_RDWR); 293fc19f8a0SPaolo Bonzini if (nbd >= 0) { 294cd831bd7Sths close(nbd); 295cd831bd7Sths } 296a517e88bSPaolo Bonzini return NULL; 297a517e88bSPaolo Bonzini } 298a517e88bSPaolo Bonzini 299a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 300a517e88bSPaolo Bonzini { 30103b67621SDenis V. Lunev struct NbdClientOpts *opts = arg; 302ac132d05SEric Blake /* TODO: Revisit this if nbd.ko ever gains support for structured reply */ 303ac132d05SEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup(""), 304ac132d05SEric Blake .mode = NBD_MODE_SIMPLE }; 305d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 306af74b550SAlex Chen int fd = -1; 307af74b550SAlex Chen int ret = EXIT_FAILURE; 308a517e88bSPaolo Bonzini pthread_t show_parts_thread; 3091ce52846SMax Reitz Error *local_error = NULL; 310a517e88bSPaolo Bonzini 311d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 312d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 313b2cecdfeSDenis V. Lunev opts->saddr, 314d0d6ff58SDaniel P. Berrange &local_error) < 0) { 31548bec07eSDaniel P. Berrange error_report_err(local_error); 316a517e88bSPaolo Bonzini goto out; 317a517e88bSPaolo Bonzini } 318a517e88bSPaolo Bonzini 319b84ca91cSStefan Hajnoczi if (nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, NULL, NULL, 320b84ca91cSStefan Hajnoczi &info, &local_error) < 0) { 3211ce52846SMax Reitz if (local_error) { 32278288671SMarkus Armbruster error_report_err(local_error); 3231ce52846SMax Reitz } 324af74b550SAlex Chen goto out; 325a517e88bSPaolo Bonzini } 326a517e88bSPaolo Bonzini 32703b67621SDenis V. Lunev fd = open(opts->device, O_RDWR); 328fc19f8a0SPaolo Bonzini if (fd < 0) { 329a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 33003b67621SDenis V. Lunev error_report("Failed to open %s: %m", opts->device); 331af74b550SAlex Chen goto out; 332a6ac2313SPaolo Bonzini } 333a6ac2313SPaolo Bonzini 334af74b550SAlex Chen if (nbd_init(fd, sioc, &info, &local_error) < 0) { 335be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 336af74b550SAlex Chen goto out; 337a517e88bSPaolo Bonzini } 338a517e88bSPaolo Bonzini 339a517e88bSPaolo Bonzini /* update partition table */ 34003b67621SDenis V. Lunev pthread_create(&show_parts_thread, NULL, show_parts, opts->device); 341a517e88bSPaolo Bonzini 342414c0cf0SDenis V. Lunev if (opts->verbose && !opts->fork_process) { 343a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 344b18d72d7SDenis V. Lunev opts->device, opts->srcpath); 345c1f8fdc3SPaolo Bonzini } else { 346f6f4620cSDenis V. Lunev nbd_client_release_pipe(opts->old_stderr); 347c1f8fdc3SPaolo Bonzini } 348a517e88bSPaolo Bonzini 349af74b550SAlex Chen if (nbd_client(fd) < 0) { 350af74b550SAlex Chen goto out; 351a517e88bSPaolo Bonzini } 352a517e88bSPaolo Bonzini 353af74b550SAlex Chen ret = EXIT_SUCCESS; 354af74b550SAlex Chen 355a517e88bSPaolo Bonzini out: 356af74b550SAlex Chen if (fd >= 0) { 357af74b550SAlex Chen close(fd); 358af74b550SAlex Chen } 359af74b550SAlex Chen object_unref(OBJECT(sioc)); 3606dc1667dSEric Blake g_free(info.name); 361a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 362af74b550SAlex Chen return (void *) (intptr_t) ret; 363cd831bd7Sths } 3643c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 365cd831bd7Sths 366e4afbf4fSFam Zheng static int nbd_can_accept(void) 367a61c6782SPaolo Bonzini { 3683dcf56e6SEric Blake return state == RUNNING && (shared == 0 || nb_fds < shared); 369a61c6782SPaolo Bonzini } 370a61c6782SPaolo Bonzini 371d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 372e4afbf4fSFam Zheng 3730c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 374a61c6782SPaolo Bonzini { 375a61c6782SPaolo Bonzini nb_fds--; 3760c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3777860a380SPaolo Bonzini state = TERMINATE; 3787860a380SPaolo Bonzini } 379d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3807860a380SPaolo Bonzini nbd_client_put(client); 381a61c6782SPaolo Bonzini } 382a61c6782SPaolo Bonzini 383e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 384e4849c1dSDaniel P. Berrange gpointer opaque) 385a61c6782SPaolo Bonzini { 3867860a380SPaolo Bonzini if (state >= TERMINATE) { 387e4849c1dSDaniel P. Berrange return; 3887860a380SPaolo Bonzini } 3897860a380SPaolo Bonzini 390a61c6782SPaolo Bonzini nb_fds++; 391d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 392b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 393d0d6ff58SDaniel P. Berrange } 394d0d6ff58SDaniel P. Berrange 395d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 396e4afbf4fSFam Zheng { 397e4afbf4fSFam Zheng if (nbd_can_accept()) { 398e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 399e4afbf4fSFam Zheng } else { 400e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 401e4afbf4fSFam Zheng } 402e4afbf4fSFam Zheng } 403e4afbf4fSFam Zheng 40448bec07eSDaniel P. Berrange 405bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 40648bec07eSDaniel P. Berrange const char *bindto, 40748bec07eSDaniel P. Berrange const char *port) 40848bec07eSDaniel P. Berrange { 409bd269ebcSMarkus Armbruster SocketAddress *saddr; 41048bec07eSDaniel P. Berrange 411bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 41248bec07eSDaniel P. Berrange if (sockpath) { 413bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 414bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 41548bec07eSDaniel P. Berrange } else { 4160399293eSEric Blake InetSocketAddress *inet; 417bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 418bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 4190399293eSEric Blake inet->host = g_strdup(bindto); 42048bec07eSDaniel P. Berrange if (port) { 4210399293eSEric Blake inet->port = g_strdup(port); 42248bec07eSDaniel P. Berrange } else { 4230399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 42448bec07eSDaniel P. Berrange } 42548bec07eSDaniel P. Berrange } 42648bec07eSDaniel P. Berrange 42748bec07eSDaniel P. Berrange return saddr; 42848bec07eSDaniel P. Berrange } 42948bec07eSDaniel P. Berrange 43048bec07eSDaniel P. Berrange 43177c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 43277c9aaefSDaniel P. Berrange .name = "file", 43377c9aaefSDaniel P. Berrange .implied_opt_name = "file", 43477c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 43577c9aaefSDaniel P. Berrange .desc = { 43677c9aaefSDaniel P. Berrange /* no elements => accept any params */ 43777c9aaefSDaniel P. Berrange { /* end of list */ } 43877c9aaefSDaniel P. Berrange }, 43977c9aaefSDaniel P. Berrange }; 44077c9aaefSDaniel P. Berrange 44168b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 44268b96f15SEric Blake Error **errp) 443145614a1SDaniel P. Berrange { 444145614a1SDaniel P. Berrange Object *obj; 445145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 446145614a1SDaniel P. Berrange 447145614a1SDaniel P. Berrange obj = object_resolve_path_component( 448145614a1SDaniel P. Berrange object_get_objects_root(), id); 449145614a1SDaniel P. Berrange if (!obj) { 450145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 451145614a1SDaniel P. Berrange id); 452145614a1SDaniel P. Berrange return NULL; 453145614a1SDaniel P. Berrange } 454145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 455145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 456145614a1SDaniel P. Berrange if (!creds) { 457145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 458145614a1SDaniel P. Berrange id); 459145614a1SDaniel P. Berrange return NULL; 460145614a1SDaniel P. Berrange } 461145614a1SDaniel P. Berrange 4620279cd95SPhilippe Mathieu-Daudé if (!qcrypto_tls_creds_check_endpoint(creds, 4630279cd95SPhilippe Mathieu-Daudé list 4640279cd95SPhilippe Mathieu-Daudé ? QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT 4650279cd95SPhilippe Mathieu-Daudé : QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4660279cd95SPhilippe Mathieu-Daudé errp)) { 46768b96f15SEric Blake return NULL; 46868b96f15SEric Blake } 469145614a1SDaniel P. Berrange object_ref(obj); 470145614a1SDaniel P. Berrange return creds; 471145614a1SDaniel P. Berrange } 472145614a1SDaniel P. Berrange 473a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 474a721f53bSRichard W.M. Jones { 475a721f53bSRichard W.M. Jones if (*address == NULL) { 476a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 477a721f53bSRichard W.M. Jones } 478a721f53bSRichard W.M. Jones 479a721f53bSRichard W.M. Jones if (*port == NULL) { 480a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 481a721f53bSRichard W.M. Jones } 482a721f53bSRichard W.M. Jones } 483a721f53bSRichard W.M. Jones 484a721f53bSRichard W.M. Jones /* 485a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 486a721f53bSRichard W.M. Jones */ 487a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 488a721f53bSRichard W.M. Jones const char *sockpath, 489a721f53bSRichard W.M. Jones const char *address, 49068b96f15SEric Blake const char *port, 4913d212b41SRichard W.M. Jones const char *selinux, 49268b96f15SEric Blake bool list) 493a721f53bSRichard W.M. Jones { 494a721f53bSRichard W.M. Jones if (device != NULL) { 495a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 496a721f53bSRichard W.M. Jones } 497a721f53bSRichard W.M. Jones 498a721f53bSRichard W.M. Jones if (sockpath != NULL) { 499a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 500a721f53bSRichard W.M. Jones } 501a721f53bSRichard W.M. Jones 502a721f53bSRichard W.M. Jones if (address != NULL) { 503a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 504a721f53bSRichard W.M. Jones } 505a721f53bSRichard W.M. Jones 506a721f53bSRichard W.M. Jones if (port != NULL) { 507a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 508a721f53bSRichard W.M. Jones } 509a721f53bSRichard W.M. Jones 5103d212b41SRichard W.M. Jones if (selinux != NULL) { 5113d212b41SRichard W.M. Jones return "SELinux label can't be set when using socket activation"; 5123d212b41SRichard W.M. Jones } 5133d212b41SRichard W.M. Jones 51468b96f15SEric Blake if (list) { 51568b96f15SEric Blake return "List mode is incompatible with socket activation"; 51668b96f15SEric Blake } 51768b96f15SEric Blake 518a721f53bSRichard W.M. Jones return NULL; 519a721f53bSRichard W.M. Jones } 520145614a1SDaniel P. Berrange 521b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 522b3b5299dSKevin Wolf { 523b3b5299dSKevin Wolf job_cancel_sync_all(); 5241895b977SSergio Lopez blk_exp_close_all(); 525b3b5299dSKevin Wolf bdrv_close_all(); 526b3b5299dSKevin Wolf } 527b3b5299dSKevin Wolf 5287a5ca864Sbellard int main(int argc, char **argv) 5297a5ca864Sbellard { 53026f54e9aSMarkus Armbruster BlockBackend *blk; 5317a5ca864Sbellard BlockDriverState *bs; 5329d26dfcbSEric Blake uint64_t dev_offset = 0; 533dbb38caaSEric Blake bool readonly = false; 534cd831bd7Sths bool disconnect = false; 535a721f53bSRichard W.M. Jones const char *bindto = NULL; 53648bec07eSDaniel P. Berrange const char *port = NULL; 53748bec07eSDaniel P. Berrange char *sockpath = NULL; 5388c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5398c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 540dbc7b014SEric Blake const char *sopt = "hVb:o:p:rsnc:dvk:e:f:tl:x:T:D:AB:L"; 5417a5ca864Sbellard struct option lopt[] = { 542aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 543aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 544aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 545aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 546aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 547aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 548aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 549dbc7b014SEric Blake { "allocation-depth", no_argument, NULL, 'A' }, 550636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 551aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 552aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 55368b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 554aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 555aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 556aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 557aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 558aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 559aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 560aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 561aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 562aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 563aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 564aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 565aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 566aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 567aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 568b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 569aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 570003b2b25SDaniel P. Berrangé { "tls-hostname", required_argument, NULL, QEMU_NBD_OPT_TLSHOSTNAME }, 571b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 572aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 57339ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 574ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 575637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 5763d212b41SRichard W.M. Jones { "selinux-label", required_argument, NULL, 5773d212b41SRichard W.M. Jones QEMU_NBD_OPT_SELINUX_LABEL }, 578660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5797a5ca864Sbellard }; 5807a5ca864Sbellard int ch; 5817a5ca864Sbellard int opt_ind = 0; 582f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5834fbec260SMax Reitz int ret = 0; 58439a5235cSPaolo Bonzini bool seen_cache = false; 585ded9d2d5SPaolo Bonzini bool seen_discard = false; 58639a5235cSPaolo Bonzini bool seen_aio = false; 587a517e88bSPaolo Bonzini pthread_t client_thread; 588e6b63677SDaniel P. Berrange const char *fmt = NULL; 58934b5d2c6SMax Reitz Error *local_err = NULL; 590b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5914fbec260SMax Reitz QDict *options = NULL; 59268b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 593b1a75b33SEric Blake const char *export_description = NULL; 594e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStrList *bitmaps = NULL; 595dbc7b014SEric Blake bool alloc_depth = false; 596145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 597003b2b25SDaniel P. Berrangé const char *tlshostname = NULL; 59877c9aaefSDaniel P. Berrange bool imageOpts = false; 59909615257SNir Soffer bool writethrough = false; /* Client will flush as needed. */ 60068b96f15SEric Blake bool list = false; 601a721f53bSRichard W.M. Jones unsigned socket_activation; 602637bc5a5SMax Reitz const char *pid_file_name = NULL; 6033d212b41SRichard W.M. Jones const char *selinux_label = NULL; 60400917172SKevin Wolf BlockExportOptions *export_opts; 6053484f676SDenis V. Lunev struct NbdClientOpts opts = { 6063484f676SDenis V. Lunev .fork_process = false, 6073484f676SDenis V. Lunev .verbose = false, 6083484f676SDenis V. Lunev .device = NULL, 609b18d72d7SDenis V. Lunev .srcpath = NULL, 610b2cecdfeSDenis V. Lunev .saddr = NULL, 611f6f4620cSDenis V. Lunev .old_stderr = STDOUT_FILENO, 6123484f676SDenis V. Lunev }; 6137a5ca864Sbellard 614029a88c9SEric Blake #ifdef CONFIG_POSIX 615cbc20bfbSStefan Hajnoczi os_setup_early_signal_handling(); 616cbc20bfbSStefan Hajnoczi os_setup_signal_handling(); 617041e32b8SMax Reitz #endif 618041e32b8SMax Reitz 61998c5d2e7SDaniel P. Berrangé socket_init(); 620f5852efaSChristophe Fergeau error_init(argv[0]); 621fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 622e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 623c2297088SDaniel P. Berrange 6240ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 62539ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 62610f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 627bb345110SPaolo Bonzini 6287a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6297a5ca864Sbellard switch (ch) { 6307a5ca864Sbellard case 's': 6312f726488Sths flags |= BDRV_O_SNAPSHOT; 6322f726488Sths break; 6332f726488Sths case 'n': 63439a5235cSPaolo Bonzini optarg = (char *) "none"; 63539a5235cSPaolo Bonzini /* fallthrough */ 63639a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 63739a5235cSPaolo Bonzini if (seen_cache) { 63885b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 63985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 64039a5235cSPaolo Bonzini } 64139a5235cSPaolo Bonzini seen_cache = true; 6426effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 64385b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 64485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 64539a5235cSPaolo Bonzini } 6467a5ca864Sbellard break; 64739a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 64839a5235cSPaolo Bonzini if (seen_aio) { 64985b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 65085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 65139a5235cSPaolo Bonzini } 65239a5235cSPaolo Bonzini seen_aio = true; 6537680274dSAarushi Mehta if (bdrv_parse_aio(optarg, &flags) < 0) { 6547680274dSAarushi Mehta error_report("Invalid aio mode '%s'", optarg); 65585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 65639a5235cSPaolo Bonzini } 65739a5235cSPaolo Bonzini break; 658ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 659ded9d2d5SPaolo Bonzini if (seen_discard) { 66085b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 66185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 662ded9d2d5SPaolo Bonzini } 663ded9d2d5SPaolo Bonzini seen_discard = true; 664ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 66585b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 66685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 667ded9d2d5SPaolo Bonzini } 668ded9d2d5SPaolo Bonzini break; 669b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 670b3838a40SPeter Lieven detect_zeroes = 671f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 672b3838a40SPeter Lieven optarg, 673b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 674b3838a40SPeter Lieven &local_err); 675b3838a40SPeter Lieven if (local_err) { 676c29b77f9SMarkus Armbruster error_reportf_err(local_err, 677c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 67885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 679b3838a40SPeter Lieven } 680b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 681b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 68285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 683b3838a40SPeter Lieven "without setting discard operation to unmap"); 68485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 685b3838a40SPeter Lieven } 686b3838a40SPeter Lieven break; 6877a5ca864Sbellard case 'b': 6887a5ca864Sbellard bindto = optarg; 6897a5ca864Sbellard break; 6907a5ca864Sbellard case 'p': 69148bec07eSDaniel P. Berrange port = optarg; 6927a5ca864Sbellard break; 6937a5ca864Sbellard case 'o': 69443b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 69543b51011SEric Blake error_report("Invalid offset '%s'", optarg); 69685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6977a5ca864Sbellard } 6987a5ca864Sbellard break; 6998c116b0eSWenchao Xia case 'l': 7008c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 70170b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 70270b94331SMarkus Armbruster optarg, false); 7038c116b0eSWenchao Xia if (!sn_opts) { 70485b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 7058c116b0eSWenchao Xia optarg); 70685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7078c116b0eSWenchao Xia } 7088c116b0eSWenchao Xia } else { 7098c116b0eSWenchao Xia sn_id_or_name = optarg; 7108c116b0eSWenchao Xia } 7118c116b0eSWenchao Xia /* fall through */ 7127a5ca864Sbellard case 'r': 713dbb38caaSEric Blake readonly = true; 71407108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 7157a5ca864Sbellard break; 716dbc7b014SEric Blake case 'A': 717dbc7b014SEric Blake alloc_depth = true; 718dbc7b014SEric Blake break; 719636192c4SEric Blake case 'B': 720e5fb29d5SVladimir Sementsov-Ogievskiy { 721e5fb29d5SVladimir Sementsov-Ogievskiy BlockDirtyBitmapOrStr *el = g_new(BlockDirtyBitmapOrStr, 1); 722e5fb29d5SVladimir Sementsov-Ogievskiy *el = (BlockDirtyBitmapOrStr) { 723e5fb29d5SVladimir Sementsov-Ogievskiy .type = QTYPE_QSTRING, 724e5fb29d5SVladimir Sementsov-Ogievskiy .u.local = g_strdup(optarg), 725e5fb29d5SVladimir Sementsov-Ogievskiy }; 726e5fb29d5SVladimir Sementsov-Ogievskiy QAPI_LIST_PREPEND(bitmaps, el); 727e5fb29d5SVladimir Sementsov-Ogievskiy } 728636192c4SEric Blake break; 729cd831bd7Sths case 'k': 730b32f6c28SPaolo Bonzini sockpath = optarg; 731713cc671SPeter Lieven if (sockpath[0] != '/') { 7329af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 73385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 734713cc671SPeter Lieven } 735cd831bd7Sths break; 736cd831bd7Sths case 'd': 737cd831bd7Sths disconnect = true; 738cd831bd7Sths break; 739cd831bd7Sths case 'c': 7403484f676SDenis V. Lunev opts.device = optarg; 741cd831bd7Sths break; 7423b05a8e9Sths case 'e': 74343b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 7443dcf56e6SEric Blake shared < 0) { 74585b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 74685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7473b05a8e9Sths } 7483b05a8e9Sths break; 749e6b63677SDaniel P. Berrange case 'f': 750e6b63677SDaniel P. Berrange fmt = optarg; 751e6b63677SDaniel P. Berrange break; 75275818250Sths case 't': 75375818250Sths persistent = 1; 75475818250Sths break; 7553d4b2f9cSDaniel P. Berrange case 'x': 7563d4b2f9cSDaniel P. Berrange export_name = optarg; 75793676c88SEric Blake if (strlen(export_name) > NBD_MAX_STRING_SIZE) { 75893676c88SEric Blake error_report("export name '%s' too long", export_name); 75993676c88SEric Blake exit(EXIT_FAILURE); 76093676c88SEric Blake } 7613d4b2f9cSDaniel P. Berrange break; 762b1a75b33SEric Blake case 'D': 763b1a75b33SEric Blake export_description = optarg; 76493676c88SEric Blake if (strlen(export_description) > NBD_MAX_STRING_SIZE) { 76593676c88SEric Blake error_report("export description '%s' too long", 76693676c88SEric Blake export_description); 76793676c88SEric Blake exit(EXIT_FAILURE); 76893676c88SEric Blake } 769b1a75b33SEric Blake break; 7707a5ca864Sbellard case 'v': 7713484f676SDenis V. Lunev opts.verbose = true; 7727a5ca864Sbellard break; 7737a5ca864Sbellard case 'V': 7747a5ca864Sbellard version(argv[0]); 7757a5ca864Sbellard exit(0); 7767a5ca864Sbellard break; 7777a5ca864Sbellard case 'h': 7787a5ca864Sbellard usage(argv[0]); 7797a5ca864Sbellard exit(0); 7807a5ca864Sbellard break; 7817a5ca864Sbellard case '?': 78285b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 78385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 784fa40e43cSKevin Wolf case QEMU_NBD_OPT_OBJECT: 785fa40e43cSKevin Wolf user_creatable_process_cmdline(optarg); 786fa40e43cSKevin Wolf break; 787145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 788145614a1SDaniel P. Berrange tlscredsid = optarg; 789145614a1SDaniel P. Berrange break; 790003b2b25SDaniel P. Berrangé case QEMU_NBD_OPT_TLSHOSTNAME: 791003b2b25SDaniel P. Berrangé tlshostname = optarg; 792003b2b25SDaniel P. Berrangé break; 79377c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 79477c9aaefSDaniel P. Berrange imageOpts = true; 79577c9aaefSDaniel P. Berrange break; 79639ca463eSDenis V. Lunev case 'T': 79792eecfffSPaolo Bonzini trace_opt_parse(optarg); 79839ca463eSDenis V. Lunev break; 799b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 800b25e12daSDaniel P. Berrange tlsauthz = optarg; 801b25e12daSDaniel P. Berrange break; 802ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 8033484f676SDenis V. Lunev opts.fork_process = true; 804ffb31e1dSMax Reitz break; 80568b96f15SEric Blake case 'L': 80668b96f15SEric Blake list = true; 80768b96f15SEric Blake break; 808637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 809637bc5a5SMax Reitz pid_file_name = optarg; 810637bc5a5SMax Reitz break; 8113d212b41SRichard W.M. Jones case QEMU_NBD_OPT_SELINUX_LABEL: 8123d212b41SRichard W.M. Jones selinux_label = optarg; 8133d212b41SRichard W.M. Jones break; 8147a5ca864Sbellard } 8157a5ca864Sbellard } 8167a5ca864Sbellard 81768b96f15SEric Blake if (list) { 81868b96f15SEric Blake if (argc != optind) { 81968b96f15SEric Blake error_report("List mode is incompatible with a file name"); 82068b96f15SEric Blake exit(EXIT_FAILURE); 82168b96f15SEric Blake } 8220bc16997SEric Blake if (export_name || export_description || dev_offset || 8233484f676SDenis V. Lunev opts.device || disconnect || fmt || sn_id_or_name || bitmaps || 824dbc7b014SEric Blake alloc_depth || seen_aio || seen_discard || seen_cache) { 82568b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 82668b96f15SEric Blake exit(EXIT_FAILURE); 82768b96f15SEric Blake } 8283484f676SDenis V. Lunev if (opts.fork_process) { 82968b96f15SEric Blake error_report("List mode is incompatible with forking"); 83068b96f15SEric Blake exit(EXIT_FAILURE); 83168b96f15SEric Blake } 83268b96f15SEric Blake } else if ((argc - optind) != 1) { 833433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 834433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 83585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 83668b96f15SEric Blake } else if (!export_name) { 83768b96f15SEric Blake export_name = ""; 8387a5ca864Sbellard } 8397a5ca864Sbellard 84039ca463eSDenis V. Lunev if (!trace_init_backends()) { 84139ca463eSDenis V. Lunev exit(1); 84239ca463eSDenis V. Lunev } 84392eecfffSPaolo Bonzini trace_init_file(); 844c5955f4fSRichard Henderson qemu_set_log(LOG_TRACE, &error_fatal); 84539ca463eSDenis V. Lunev 846a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 847a721f53bSRichard W.M. Jones if (socket_activation == 0) { 848e8ae8b1aSDaniel P. Berrangé if (!sockpath) { 849a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 850e8ae8b1aSDaniel P. Berrangé } 851a721f53bSRichard W.M. Jones } else { 852a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 8533484f676SDenis V. Lunev const char *err_msg = socket_activation_validate_opts(opts.device, 8543484f676SDenis V. Lunev sockpath, 85568b96f15SEric Blake bindto, port, 8563d212b41SRichard W.M. Jones selinux_label, 85768b96f15SEric Blake list); 858a721f53bSRichard W.M. Jones if (err_msg != NULL) { 859a721f53bSRichard W.M. Jones error_report("%s", err_msg); 860a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 861a721f53bSRichard W.M. Jones } 86253fabd4bSPaolo Bonzini 86353fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 86453fabd4bSPaolo Bonzini if (socket_activation > 1) { 86553fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 86653fabd4bSPaolo Bonzini "LISTEN_FDS"); 86753fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 86853fabd4bSPaolo Bonzini } 869a721f53bSRichard W.M. Jones } 870a721f53bSRichard W.M. Jones 871145614a1SDaniel P. Berrange if (tlscredsid) { 8723484f676SDenis V. Lunev if (opts.device) { 873145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 874145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 875145614a1SDaniel P. Berrange } 876b25e12daSDaniel P. Berrange if (tlsauthz && list) { 877b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 878b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 879b25e12daSDaniel P. Berrange } 880003b2b25SDaniel P. Berrangé if (tlshostname && !list) { 881003b2b25SDaniel P. Berrangé error_report("TLS hostname is only supported with export list"); 882003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 883003b2b25SDaniel P. Berrangé } 88468b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 885145614a1SDaniel P. Berrange if (local_err) { 8865217f188SMarkus Armbruster error_reportf_err(local_err, "Failed to get TLS creds: "); 887145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 888145614a1SDaniel P. Berrange } 889b25e12daSDaniel P. Berrange } else { 890b25e12daSDaniel P. Berrange if (tlsauthz) { 891b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 892b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 893b25e12daSDaniel P. Berrange } 894003b2b25SDaniel P. Berrangé if (tlshostname) { 895003b2b25SDaniel P. Berrangé error_report("--tls-hostname is not permitted without --tls-creds"); 896003b2b25SDaniel P. Berrangé exit(EXIT_FAILURE); 897003b2b25SDaniel P. Berrangé } 898145614a1SDaniel P. Berrange } 899145614a1SDaniel P. Berrange 9003d212b41SRichard W.M. Jones if (selinux_label) { 9013d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 9023484f676SDenis V. Lunev if (sockpath == NULL && opts.device == NULL) { 9033d212b41SRichard W.M. Jones error_report("--selinux-label is not permitted without --socket"); 9043d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 9053d212b41SRichard W.M. Jones } 9063d212b41SRichard W.M. Jones #else 9073d212b41SRichard W.M. Jones error_report("SELinux support not enabled in this binary"); 9083d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 9093d212b41SRichard W.M. Jones #endif 9103d212b41SRichard W.M. Jones } 9113d212b41SRichard W.M. Jones 91268b96f15SEric Blake if (list) { 913b2cecdfeSDenis V. Lunev opts.saddr = nbd_build_socket_address(sockpath, bindto, port); 914b2cecdfeSDenis V. Lunev return qemu_nbd_client_list(opts.saddr, tlscreds, 915003b2b25SDaniel P. Berrangé tlshostname ? tlshostname : bindto); 91668b96f15SEric Blake } 91768b96f15SEric Blake 9183c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 9193484f676SDenis V. Lunev if (disconnect || opts.device) { 9203c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 9213c1fa35dSEric Blake exit(EXIT_FAILURE); 9223c1fa35dSEric Blake } 9233c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 924cd831bd7Sths if (disconnect) { 925d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 926d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 92785b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 92885b01e09SMarkus Armbruster strerror(errno)); 92985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 930fc19f8a0SPaolo Bonzini } 931d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 932cd831bd7Sths 933d0d6ff58SDaniel P. Berrange close(nbdfd); 934cd831bd7Sths 935cd831bd7Sths printf("%s disconnected\n", argv[optind]); 936cd831bd7Sths 937cd831bd7Sths return 0; 938cd831bd7Sths } 9393c1fa35dSEric Blake #endif 940cd831bd7Sths 9413484f676SDenis V. Lunev if ((opts.device && !opts.verbose) || opts.fork_process) { 942eb705985SDaniel P. Berrangé #ifndef WIN32 943a7241974SMarc-André Lureau g_autoptr(GError) err = NULL; 944c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 945c1f8fdc3SPaolo Bonzini pid_t pid; 946c1f8fdc3SPaolo Bonzini 947a7241974SMarc-André Lureau if (!g_unix_open_pipe(stderr_fd, FD_CLOEXEC, &err)) { 94885b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 949a7241974SMarc-André Lureau err->message); 95085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 951c1f8fdc3SPaolo Bonzini } 952c1f8fdc3SPaolo Bonzini 953c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 954c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 955c1f8fdc3SPaolo Bonzini */ 956c1f8fdc3SPaolo Bonzini pid = fork(); 95770d4739eSMax Reitz if (pid < 0) { 95885b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 95985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 96070d4739eSMax Reitz } else if (pid == 0) { 9611dc82151SDenis V. Lunev int saved_errno; 9621dc82151SDenis V. Lunev 963c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 964e6df58a5SMax Reitz 965f6f4620cSDenis V. Lunev /* Remember parent's stderr if we will be restoring it. */ 966f6f4620cSDenis V. Lunev if (opts.verbose /* fork_process is set */) { 967f6f4620cSDenis V. Lunev opts.old_stderr = dup(STDERR_FILENO); 968f6f4620cSDenis V. Lunev if (opts.old_stderr < 0) { 969f6f4620cSDenis V. Lunev error_report("Could not dup original stderr: %s", 970f6f4620cSDenis V. Lunev strerror(errno)); 971f6f4620cSDenis V. Lunev exit(EXIT_FAILURE); 972f6f4620cSDenis V. Lunev } 973f6f4620cSDenis V. Lunev } 974f6f4620cSDenis V. Lunev 9759faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 9761dc82151SDenis V. Lunev saved_errno = errno; /* dup2 will overwrite error below */ 977c1f8fdc3SPaolo Bonzini 978c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 979e0892cedSDenis V. Lunev if (dup2(stderr_fd[1], STDERR_FILENO) < 0) { 980e0892cedSDenis V. Lunev char str[256]; 981e0892cedSDenis V. Lunev snprintf(str, sizeof(str), 982e0892cedSDenis V. Lunev "%s: Failed to link stderr to the pipe: %s\n", 983e0892cedSDenis V. Lunev g_get_prgname(), strerror(errno)); 984e0892cedSDenis V. Lunev /* 985e0892cedSDenis V. Lunev * We are unable to use error_report() here as we need to get 986e0892cedSDenis V. Lunev * stderr pointed to the parent's pipe. Write to that pipe 987e0892cedSDenis V. Lunev * manually. 988e0892cedSDenis V. Lunev */ 989e0892cedSDenis V. Lunev ret = write(stderr_fd[1], str, strlen(str)); 990e0892cedSDenis V. Lunev exit(EXIT_FAILURE); 991e0892cedSDenis V. Lunev } 992e0892cedSDenis V. Lunev 993fc19f8a0SPaolo Bonzini if (ret < 0) { 9941dc82151SDenis V. Lunev error_report("Failed to daemonize: %s", strerror(saved_errno)); 99585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 996c1f8fdc3SPaolo Bonzini } 997c1f8fdc3SPaolo Bonzini 998c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 999c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1000c1f8fdc3SPaolo Bonzini } else { 1001c1f8fdc3SPaolo Bonzini bool errors = false; 1002c1f8fdc3SPaolo Bonzini char *buf; 1003c1f8fdc3SPaolo Bonzini 1004c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 1005c1f8fdc3SPaolo Bonzini * it closes the pipe. 1006c1f8fdc3SPaolo Bonzini */ 1007c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1008c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 1009c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 1010c1f8fdc3SPaolo Bonzini errors = true; 1011c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 1012fc19f8a0SPaolo Bonzini if (ret < 0) { 1013c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 1014c1f8fdc3SPaolo Bonzini } 1015c1f8fdc3SPaolo Bonzini } 1016fc19f8a0SPaolo Bonzini if (ret < 0) { 101785b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 101885b01e09SMarkus Armbruster strerror(errno)); 101985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1020c1f8fdc3SPaolo Bonzini } 1021c1f8fdc3SPaolo Bonzini 1022c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 1023c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 1024c1f8fdc3SPaolo Bonzini */ 1025c1f8fdc3SPaolo Bonzini exit(errors); 1026c1f8fdc3SPaolo Bonzini } 1027eb705985SDaniel P. Berrangé #else /* WIN32 */ 1028eb705985SDaniel P. Berrangé error_report("Unable to fork into background on Windows hosts"); 1029eb705985SDaniel P. Berrangé exit(EXIT_FAILURE); 1030eb705985SDaniel P. Berrangé #endif /* WIN32 */ 1031c1f8fdc3SPaolo Bonzini } 1032c1f8fdc3SPaolo Bonzini 10333484f676SDenis V. Lunev if (opts.device != NULL && sockpath == NULL) { 1034b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 10353484f676SDenis V. Lunev snprintf(sockpath, 128, SOCKET_PATH, basename(opts.device)); 1036cd831bd7Sths } 1037cd831bd7Sths 1038e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1039a721f53bSRichard W.M. Jones if (socket_activation == 0) { 1040582d4210SEric Blake int backlog; 1041582d4210SEric Blake 10423dcf56e6SEric Blake if (persistent || shared == 0) { 1043582d4210SEric Blake backlog = SOMAXCONN; 1044582d4210SEric Blake } else { 1045582d4210SEric Blake backlog = MIN(shared, SOMAXCONN); 1046582d4210SEric Blake } 10473d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10483d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(selinux_label) == -1) { 10493d212b41SRichard W.M. Jones error_report("Cannot set SELinux socket create context to %s: %s", 10503d212b41SRichard W.M. Jones selinux_label, strerror(errno)); 10513d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10523d212b41SRichard W.M. Jones } 10533d212b41SRichard W.M. Jones #endif 1054b2cecdfeSDenis V. Lunev opts.saddr = nbd_build_socket_address(sockpath, bindto, port); 1055b2cecdfeSDenis V. Lunev if (qio_net_listener_open_sync(server, opts.saddr, backlog, 1056582d4210SEric Blake &local_err) < 0) { 1057e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1058a721f53bSRichard W.M. Jones error_report_err(local_err); 1059e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1060a721f53bSRichard W.M. Jones } 10613d212b41SRichard W.M. Jones #ifdef CONFIG_SELINUX 10623d212b41SRichard W.M. Jones if (selinux_label && setsockcreatecon_raw(NULL) == -1) { 10633d212b41SRichard W.M. Jones error_report("Cannot clear SELinux socket create context: %s", 10643d212b41SRichard W.M. Jones strerror(errno)); 10653d212b41SRichard W.M. Jones exit(EXIT_FAILURE); 10663d212b41SRichard W.M. Jones } 10673d212b41SRichard W.M. Jones #endif 1068a721f53bSRichard W.M. Jones } else { 1069e4849c1dSDaniel P. Berrange size_t i; 1070a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1071e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1072e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1073e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1074a721f53bSRichard W.M. Jones &local_err); 1075e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1076e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 10775217f188SMarkus Armbruster error_reportf_err(local_err, 10785217f188SMarkus Armbruster "Failed to use socket activation: "); 1079a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1080a721f53bSRichard W.M. Jones } 1081e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1082e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1083e4849c1dSDaniel P. Berrange } 1084a721f53bSRichard W.M. Jones } 108548bec07eSDaniel P. Berrange 1086f9734d5dSMarkus Armbruster qemu_init_main_loop(&error_fatal); 1087802ddc37SPaolo Bonzini bdrv_init(); 1088b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1089802ddc37SPaolo Bonzini 1090b18d72d7SDenis V. Lunev opts.srcpath = argv[optind]; 109177c9aaefSDaniel P. Berrange if (imageOpts) { 1092b18d72d7SDenis V. Lunev QemuOpts *o; 109377c9aaefSDaniel P. Berrange if (fmt) { 109477c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 109577c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 109677c9aaefSDaniel P. Berrange } 1097b18d72d7SDenis V. Lunev o = qemu_opts_parse_noisily(&file_opts, opts.srcpath, true); 1098b18d72d7SDenis V. Lunev if (!o) { 109977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 110077c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 110177c9aaefSDaniel P. Berrange } 1102b18d72d7SDenis V. Lunev options = qemu_opts_to_qdict(o, NULL); 110377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1104efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 110577c9aaefSDaniel P. Berrange } else { 1106e6b63677SDaniel P. Berrange if (fmt) { 11074fbec260SMax Reitz options = qdict_new(); 110846f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1109e6b63677SDaniel P. Berrange } 1110b18d72d7SDenis V. Lunev blk = blk_new_open(opts.srcpath, NULL, options, flags, &local_err); 111177c9aaefSDaniel P. Berrange } 111277c9aaefSDaniel P. Berrange 11134fbec260SMax Reitz if (!blk) { 1114c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1115c29b77f9SMarkus Armbruster argv[optind]); 111685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1117802ddc37SPaolo Bonzini } 11184fbec260SMax Reitz bs = blk_bs(blk); 1119802ddc37SPaolo Bonzini 1120b57e4de0SKevin Wolf if (dev_offset) { 1121b57e4de0SKevin Wolf QDict *raw_opts = qdict_new(); 1122b57e4de0SKevin Wolf qdict_put_str(raw_opts, "driver", "raw"); 1123b57e4de0SKevin Wolf qdict_put_str(raw_opts, "file", bs->node_name); 1124b57e4de0SKevin Wolf qdict_put_int(raw_opts, "offset", dev_offset); 1125c6e0a6deSKevin Wolf 1126c6e0a6deSKevin Wolf aio_context_acquire(qemu_get_aio_context()); 1127b57e4de0SKevin Wolf bs = bdrv_open(NULL, NULL, raw_opts, flags, &error_fatal); 1128c6e0a6deSKevin Wolf aio_context_release(qemu_get_aio_context()); 1129c6e0a6deSKevin Wolf 1130b57e4de0SKevin Wolf blk_remove_bs(blk); 1131b57e4de0SKevin Wolf blk_insert_bs(blk, bs, &error_fatal); 1132b57e4de0SKevin Wolf bdrv_unref(bs); 1133b57e4de0SKevin Wolf } 1134b57e4de0SKevin Wolf 11356effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11366effd5bfSKevin Wolf 11378c116b0eSWenchao Xia if (sn_opts) { 11388c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11398c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11408c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11418c116b0eSWenchao Xia &local_err); 11428c116b0eSWenchao Xia } else if (sn_id_or_name) { 11438c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11448c116b0eSWenchao Xia &local_err); 11458c116b0eSWenchao Xia } 11468c116b0eSWenchao Xia if (ret < 0) { 1147c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 114885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11498c116b0eSWenchao Xia } 11508c116b0eSWenchao Xia 1151b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 1152802ddc37SPaolo Bonzini 1153a5fced40SEric Blake nbd_server_is_qemu_nbd(shared); 115400917172SKevin Wolf 115500917172SKevin Wolf export_opts = g_new(BlockExportOptions, 1); 115600917172SKevin Wolf *export_opts = (BlockExportOptions) { 115700917172SKevin Wolf .type = BLOCK_EXPORT_TYPE_NBD, 1158d53be9ceSKevin Wolf .id = g_strdup("qemu-nbd-export"), 1159b6076afcSKevin Wolf .node_name = g_strdup(bdrv_get_node_name(bs)), 116000917172SKevin Wolf .has_writethrough = true, 116100917172SKevin Wolf .writethrough = writethrough, 116230dbc81dSKevin Wolf .has_writable = true, 116330dbc81dSKevin Wolf .writable = !readonly, 116400917172SKevin Wolf .u.nbd = { 116500917172SKevin Wolf .name = g_strdup(export_name), 116600917172SKevin Wolf .description = g_strdup(export_description), 1167cbad81ceSEric Blake .has_bitmaps = !!bitmaps, 1168cbad81ceSEric Blake .bitmaps = bitmaps, 1169dbc7b014SEric Blake .has_allocation_depth = alloc_depth, 1170dbc7b014SEric Blake .allocation_depth = alloc_depth, 117100917172SKevin Wolf }, 117200917172SKevin Wolf }; 117300917172SKevin Wolf blk_exp_add(export_opts, &error_fatal); 117400917172SKevin Wolf qapi_free_BlockExportOptions(export_opts); 11753b05a8e9Sths 11763484f676SDenis V. Lunev if (opts.device) { 11773c1fa35dSEric Blake #if HAVE_NBD_DEVICE 117803b67621SDenis V. Lunev ret = pthread_create(&client_thread, NULL, nbd_client_thread, &opts); 1179f1ef5555SPaolo Bonzini if (ret != 0) { 118085b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 118185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1182f1ef5555SPaolo Bonzini } 11833c1fa35dSEric Blake #endif 1184f1ef5555SPaolo Bonzini } else { 1185f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1186f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1187f1ef5555SPaolo Bonzini } 1188f1ef5555SPaolo Bonzini 1189d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11907a5ca864Sbellard 1191637bc5a5SMax Reitz if (pid_file_name) { 1192637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1193637bc5a5SMax Reitz } 1194637bc5a5SMax Reitz 11959faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 11969faf31b6SMichael Tokarev * to free any busy filesystems */ 11979faf31b6SMichael Tokarev if (chdir("/") < 0) { 119885b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 119985b01e09SMarkus Armbruster strerror(errno)); 120085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 12019faf31b6SMichael Tokarev } 12029faf31b6SMichael Tokarev 12033484f676SDenis V. Lunev if (opts.fork_process) { 1204f6f4620cSDenis V. Lunev nbd_client_release_pipe(opts.old_stderr); 1205ffb31e1dSMax Reitz } 1206ffb31e1dSMax Reitz 12077860a380SPaolo Bonzini state = RUNNING; 12083b05a8e9Sths do { 1209a61c6782SPaolo Bonzini main_loop_wait(false); 12107860a380SPaolo Bonzini if (state == TERMINATE) { 1211bc4ee65bSKevin Wolf blk_exp_close_all(); 1212d794f7f3SKevin Wolf state = TERMINATED; 12137860a380SPaolo Bonzini } 12147860a380SPaolo Bonzini } while (state != TERMINATED); 12152c8d9f06SPaolo Bonzini 121626f54e9aSMarkus Armbruster blk_unref(blk); 1217b32f6c28SPaolo Bonzini if (sockpath) { 1218b32f6c28SPaolo Bonzini unlink(sockpath); 1219b32f6c28SPaolo Bonzini } 12207a5ca864Sbellard 12218c116b0eSWenchao Xia qemu_opts_del(sn_opts); 12228c116b0eSWenchao Xia 12233484f676SDenis V. Lunev if (opts.device) { 1224e161785cSEric Blake void *result; 1225e161785cSEric Blake pthread_join(client_thread, &result); 1226e161785cSEric Blake ret = (intptr_t)result; 1227e161785cSEric Blake exit(ret); 1228a517e88bSPaolo Bonzini } else { 1229a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1230a517e88bSPaolo Bonzini } 12317a5ca864Sbellard } 1232