1cd831bd7Sths /* 27a5ca864Sbellard * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> 37a5ca864Sbellard * 47a5ca864Sbellard * Network Block Device 57a5ca864Sbellard * 67a5ca864Sbellard * This program is free software; you can redistribute it and/or modify 77a5ca864Sbellard * it under the terms of the GNU General Public License as published by 87a5ca864Sbellard * the Free Software Foundation; under version 2 of the License. 97a5ca864Sbellard * 107a5ca864Sbellard * This program is distributed in the hope that it will be useful, 117a5ca864Sbellard * but WITHOUT ANY WARRANTY; without even the implied warranty of 127a5ca864Sbellard * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 137a5ca864Sbellard * GNU General Public License for more details. 147a5ca864Sbellard * 157a5ca864Sbellard * You should have received a copy of the GNU General Public License 168167ee88SBlue Swirl * along with this program; if not, see <http://www.gnu.org/licenses/>. 177a5ca864Sbellard */ 187a5ca864Sbellard 19d38ea87aSPeter Maydell #include "qemu/osdep.h" 20c2a3d7daSEric Blake #include <getopt.h> 21c2a3d7daSEric Blake #include <libgen.h> 22c2a3d7daSEric Blake #include <pthread.h> 23c2a3d7daSEric Blake 24a8d25326SMarkus Armbruster #include "qemu-common.h" 25da34e65cSMarkus Armbruster #include "qapi/error.h" 26f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2726f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 28b3838a40SPeter Lieven #include "block/block_int.h" 29737e150eSPaolo Bonzini #include "block/nbd.h" 306a1751b7SAlex Bligh #include "qemu/main-loop.h" 310b8fa32fSMarkus Armbruster #include "qemu/module.h" 32922a01a0SMarkus Armbruster #include "qemu/option.h" 33537b41f5SPaolo Bonzini #include "qemu/error-report.h" 340ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3558369e22SPaolo Bonzini #include "qemu/bswap.h" 3639ca463eSDenis V. Lunev #include "qemu/log.h" 3753fabd4bSPaolo Bonzini #include "qemu/systemd.h" 388c116b0eSWenchao Xia #include "block/snapshot.h" 39452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 40d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 410ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 42d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 43e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 44c2297088SDaniel P. Berrange #include "crypto/init.h" 4539ca463eSDenis V. Lunev #include "trace/control.h" 46be377133SEric Blake #include "qemu-version.h" 477a5ca864Sbellard 483c1fa35dSEric Blake #ifdef __linux__ 493c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 503c1fa35dSEric Blake #else 513c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 523c1fa35dSEric Blake #endif 533c1fa35dSEric Blake 54cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 55fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 56fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 57fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 58fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 59fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 60fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 61fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 62ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 63b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 64637bc5a5SMax Reitz #define QEMU_NBD_OPT_PID_FILE 265 657a5ca864Sbellard 66bd31c214SEric Blake #define MBR_SIZE 512 67bd31c214SEric Blake 689d976580SPhilippe Mathieu-Daudé static NBDExport *export; 69b1d8e52eSblueswir1 static int verbose; 70a517e88bSPaolo Bonzini static char *srcpath; 71bd269ebcSMarkus Armbruster static SocketAddress *saddr; 727860a380SPaolo Bonzini static int persistent = 0; 737860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 74a61c6782SPaolo Bonzini static int shared = 1; 75a61c6782SPaolo Bonzini static int nb_fds; 76e4849c1dSDaniel P. Berrange static QIONetListener *server; 77145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 78b25e12daSDaniel P. Berrange static const char *tlsauthz; 797a5ca864Sbellard 807a5ca864Sbellard static void usage(const char *name) 817a5ca864Sbellard { 82b033cd86SPaolo Bonzini (printf) ( 837a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8468b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8568b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 867a5ca864Sbellard "\n" 877a5ca864Sbellard " -h, --help display this help and exit\n" 887a5ca864Sbellard " -V, --version output version information and exit\n" 897a5ca864Sbellard "\n" 90b033cd86SPaolo Bonzini "Connection properties:\n" 91b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 92b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 93b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 94b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 95b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 96b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 97b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 98f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 99f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 100b033cd86SPaolo Bonzini "\n" 101b033cd86SPaolo Bonzini "Exposing part of the image:\n" 102b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 103b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 104636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 105b033cd86SPaolo Bonzini "\n" 1060ab3b337SDaniel P. Berrange "General purpose options:\n" 10768b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1080ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1090ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 110f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 111b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 112b25e12daSDaniel P. Berrange " authorization\n" 11339ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11439ca463eSDenis V. Lunev " specify tracing options\n" 115ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 116ffb31e1dSMax Reitz " once the server is running\n" 117637bc5a5SMax Reitz " --pid-file=PATH store the server's process ID in the given file\n" 1183c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1193c1fa35dSEric Blake "\n" 120b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 121b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 122b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 123b033cd86SPaolo Bonzini #endif 124b033cd86SPaolo Bonzini "\n" 125b033cd86SPaolo Bonzini "Block device options:\n" 1264323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 127b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1288c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1298c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1308c116b0eSWenchao Xia " the temporary one\n" 1318c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1328c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1338c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1348c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1358c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 136b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 13739a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 13839a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 139b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1406883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 14177c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 142b033cd86SPaolo Bonzini "\n" 143f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 14468b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1457a5ca864Sbellard } 1467a5ca864Sbellard 1477a5ca864Sbellard static void version(const char *name) 1487a5ca864Sbellard { 1497a5ca864Sbellard printf( 1507e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1517a5ca864Sbellard "Written by Anthony Liguori.\n" 1527a5ca864Sbellard "\n" 153be377133SEric Blake QEMU_COPYRIGHT "\n" 1547a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1557a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 156315bc7aaSths , name); 1577a5ca864Sbellard } 1587a5ca864Sbellard 1597a5ca864Sbellard struct partition_record 1607a5ca864Sbellard { 1617a5ca864Sbellard uint8_t bootable; 1627a5ca864Sbellard uint8_t start_head; 1637a5ca864Sbellard uint32_t start_cylinder; 1647a5ca864Sbellard uint8_t start_sector; 1657a5ca864Sbellard uint8_t system; 1667a5ca864Sbellard uint8_t end_head; 1677a5ca864Sbellard uint8_t end_cylinder; 1687a5ca864Sbellard uint8_t end_sector; 1697a5ca864Sbellard uint32_t start_sector_abs; 1707a5ca864Sbellard uint32_t nb_sectors_abs; 1717a5ca864Sbellard }; 1727a5ca864Sbellard 1737a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1747a5ca864Sbellard { 1757a5ca864Sbellard r->bootable = p[0]; 1767a5ca864Sbellard r->start_head = p[1]; 1777a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1787a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1797a5ca864Sbellard r->system = p[4]; 1807a5ca864Sbellard r->end_head = p[5]; 1817a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1827a5ca864Sbellard r->end_sector = p[6] & 0x3f; 183ac97393dSMax Reitz 184773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 185773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1867a5ca864Sbellard } 1877a5ca864Sbellard 1884c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1899d26dfcbSEric Blake uint64_t *offset, uint64_t *size) 1907a5ca864Sbellard { 1917a5ca864Sbellard struct partition_record mbr[4]; 192bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1937a5ca864Sbellard int i; 1947a5ca864Sbellard int ext_partnum = 4; 195cb7cf0e3SRyota Ozaki int ret; 1967a5ca864Sbellard 197bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 198bd31c214SEric Blake if (ret < 0) { 199a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 201cb7cf0e3SRyota Ozaki } 2027a5ca864Sbellard 2037a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 204185b4338SPaolo Bonzini return -EINVAL; 2057a5ca864Sbellard } 2067a5ca864Sbellard 2077a5ca864Sbellard for (i = 0; i < 4; i++) { 2087a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 2097a5ca864Sbellard 210453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 2117a5ca864Sbellard continue; 212453b07b1SMax Reitz } 2137a5ca864Sbellard 2147a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 2157a5ca864Sbellard struct partition_record ext[4]; 216bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2177a5ca864Sbellard int j; 2187a5ca864Sbellard 219bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 220bd31c214SEric Blake data1, sizeof(data1)); 221bd31c214SEric Blake if (ret < 0) { 222a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 22385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 224cb7cf0e3SRyota Ozaki } 2257a5ca864Sbellard 2267a5ca864Sbellard for (j = 0; j < 4; j++) { 2277a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 228453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2297a5ca864Sbellard continue; 230453b07b1SMax Reitz } 2317a5ca864Sbellard 2327a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2337a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2347a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2357a5ca864Sbellard return 0; 2367a5ca864Sbellard } 2377a5ca864Sbellard } 2387a5ca864Sbellard ext_partnum += 4; 2397a5ca864Sbellard } else if ((i + 1) == partition) { 2407a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2417a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2427a5ca864Sbellard return 0; 2437a5ca864Sbellard } 2447a5ca864Sbellard } 2457a5ca864Sbellard 246185b4338SPaolo Bonzini return -ENOENT; 2477a5ca864Sbellard } 2487a5ca864Sbellard 249bb345110SPaolo Bonzini static void termsig_handler(int signum) 250bb345110SPaolo Bonzini { 25123994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 252a61c6782SPaolo Bonzini qemu_notify_event(); 253bb345110SPaolo Bonzini } 254bb345110SPaolo Bonzini 255537b41f5SPaolo Bonzini 25668b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 25768b96f15SEric Blake const char *hostname) 25868b96f15SEric Blake { 25968b96f15SEric Blake int ret = EXIT_FAILURE; 26068b96f15SEric Blake int rc; 26168b96f15SEric Blake Error *err = NULL; 26268b96f15SEric Blake QIOChannelSocket *sioc; 26368b96f15SEric Blake NBDExportInfo *list; 26468b96f15SEric Blake int i, j; 26568b96f15SEric Blake 26668b96f15SEric Blake sioc = qio_channel_socket_new(); 26768b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 26868b96f15SEric Blake error_report_err(err); 26968b96f15SEric Blake return EXIT_FAILURE; 27068b96f15SEric Blake } 27168b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 27268b96f15SEric Blake &err); 27368b96f15SEric Blake if (rc < 0) { 27468b96f15SEric Blake if (err) { 27568b96f15SEric Blake error_report_err(err); 27668b96f15SEric Blake } 27768b96f15SEric Blake goto out; 27868b96f15SEric Blake } 27968b96f15SEric Blake printf("exports available: %d\n", rc); 28068b96f15SEric Blake for (i = 0; i < rc; i++) { 28168b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 28268b96f15SEric Blake if (list[i].description && *list[i].description) { 28368b96f15SEric Blake printf(" description: %s\n", list[i].description); 28468b96f15SEric Blake } 28568b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 286c4e2aff8SMax Reitz static const char *const flag_names[] = { 287c4e2aff8SMax Reitz [NBD_FLAG_READ_ONLY_BIT] = "readonly", 288c4e2aff8SMax Reitz [NBD_FLAG_SEND_FLUSH_BIT] = "flush", 289c4e2aff8SMax Reitz [NBD_FLAG_SEND_FUA_BIT] = "fua", 290c4e2aff8SMax Reitz [NBD_FLAG_ROTATIONAL_BIT] = "rotational", 291c4e2aff8SMax Reitz [NBD_FLAG_SEND_TRIM_BIT] = "trim", 292c4e2aff8SMax Reitz [NBD_FLAG_SEND_WRITE_ZEROES_BIT] = "zeroes", 293c4e2aff8SMax Reitz [NBD_FLAG_SEND_DF_BIT] = "df", 294c4e2aff8SMax Reitz [NBD_FLAG_CAN_MULTI_CONN_BIT] = "multi", 295c4e2aff8SMax Reitz [NBD_FLAG_SEND_RESIZE_BIT] = "resize", 296c4e2aff8SMax Reitz [NBD_FLAG_SEND_CACHE_BIT] = "cache", 297*0a479545SEric Blake [NBD_FLAG_SEND_FAST_ZERO_BIT] = "fast-zero", 298c4e2aff8SMax Reitz }; 299c4e2aff8SMax Reitz 30068b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 30168b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 302c4e2aff8SMax Reitz for (size_t bit = 0; bit < ARRAY_SIZE(flag_names); bit++) { 303c4e2aff8SMax Reitz if (flag_names[bit] && (list[i].flags & (1 << bit))) { 304c4e2aff8SMax Reitz printf(" %s", flag_names[bit]); 30568b96f15SEric Blake } 30668b96f15SEric Blake } 30768b96f15SEric Blake printf(" )\n"); 30868b96f15SEric Blake } 30968b96f15SEric Blake if (list[i].min_block) { 31068b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 31168b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 31268b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 31368b96f15SEric Blake } 31468b96f15SEric Blake if (list[i].n_contexts) { 31568b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 31668b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 31768b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 31868b96f15SEric Blake } 31968b96f15SEric Blake } 32068b96f15SEric Blake } 32168b96f15SEric Blake nbd_free_export_list(list, rc); 32268b96f15SEric Blake 32368b96f15SEric Blake ret = EXIT_SUCCESS; 32468b96f15SEric Blake out: 32568b96f15SEric Blake object_unref(OBJECT(sioc)); 32668b96f15SEric Blake return ret; 32768b96f15SEric Blake } 32868b96f15SEric Blake 32968b96f15SEric Blake 3303c1fa35dSEric Blake #if HAVE_NBD_DEVICE 331a517e88bSPaolo Bonzini static void *show_parts(void *arg) 332cd831bd7Sths { 333a6ac2313SPaolo Bonzini char *device = arg; 334cd831bd7Sths int nbd; 335cd831bd7Sths 336cd831bd7Sths /* linux just needs an open() to trigger 337cd831bd7Sths * the partition table update 338cd831bd7Sths * but remember to load the module with max_part != 0 : 339cd831bd7Sths * modprobe nbd max_part=63 340cd831bd7Sths */ 341cd831bd7Sths nbd = open(device, O_RDWR); 342fc19f8a0SPaolo Bonzini if (nbd >= 0) { 343cd831bd7Sths close(nbd); 344cd831bd7Sths } 345a517e88bSPaolo Bonzini return NULL; 346a517e88bSPaolo Bonzini } 347a517e88bSPaolo Bonzini 348a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 349a517e88bSPaolo Bonzini { 350a6ac2313SPaolo Bonzini char *device = arg; 3516dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 352d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 353d0d6ff58SDaniel P. Berrange int fd; 354a517e88bSPaolo Bonzini int ret; 355a517e88bSPaolo Bonzini pthread_t show_parts_thread; 3561ce52846SMax Reitz Error *local_error = NULL; 357a517e88bSPaolo Bonzini 358d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 359d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 360d0d6ff58SDaniel P. Berrange saddr, 361d0d6ff58SDaniel P. Berrange &local_error) < 0) { 36248bec07eSDaniel P. Berrange error_report_err(local_error); 363a517e88bSPaolo Bonzini goto out; 364a517e88bSPaolo Bonzini } 365a517e88bSPaolo Bonzini 366a8e2bb6aSVladimir Sementsov-Ogievskiy ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), 367004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 368fc19f8a0SPaolo Bonzini if (ret < 0) { 3691ce52846SMax Reitz if (local_error) { 37078288671SMarkus Armbruster error_report_err(local_error); 3711ce52846SMax Reitz } 3720c544d73SPaolo Bonzini goto out_socket; 373a517e88bSPaolo Bonzini } 374a517e88bSPaolo Bonzini 375a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 376fc19f8a0SPaolo Bonzini if (fd < 0) { 377a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 378b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 3790c544d73SPaolo Bonzini goto out_socket; 380a6ac2313SPaolo Bonzini } 381a6ac2313SPaolo Bonzini 382004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 383fc19f8a0SPaolo Bonzini if (ret < 0) { 384be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 3850c544d73SPaolo Bonzini goto out_fd; 386a517e88bSPaolo Bonzini } 387a517e88bSPaolo Bonzini 388a517e88bSPaolo Bonzini /* update partition table */ 389a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 390a517e88bSPaolo Bonzini 391c1f8fdc3SPaolo Bonzini if (verbose) { 392a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 393a517e88bSPaolo Bonzini device, srcpath); 394c1f8fdc3SPaolo Bonzini } else { 395c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 396c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 397c1f8fdc3SPaolo Bonzini } 398a517e88bSPaolo Bonzini 399a517e88bSPaolo Bonzini ret = nbd_client(fd); 400a517e88bSPaolo Bonzini if (ret) { 4010c544d73SPaolo Bonzini goto out_fd; 402a517e88bSPaolo Bonzini } 403a517e88bSPaolo Bonzini close(fd); 404d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 4056dc1667dSEric Blake g_free(info.name); 406a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 407a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 408a517e88bSPaolo Bonzini 4090c544d73SPaolo Bonzini out_fd: 4100c544d73SPaolo Bonzini close(fd); 4110c544d73SPaolo Bonzini out_socket: 412d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 413a517e88bSPaolo Bonzini out: 4146dc1667dSEric Blake g_free(info.name); 415a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 416a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 417cd831bd7Sths } 4183c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 419cd831bd7Sths 420e4afbf4fSFam Zheng static int nbd_can_accept(void) 421a61c6782SPaolo Bonzini { 422df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 423a61c6782SPaolo Bonzini } 424a61c6782SPaolo Bonzini 4259d976580SPhilippe Mathieu-Daudé static void nbd_export_closed(NBDExport *export) 4267860a380SPaolo Bonzini { 4277860a380SPaolo Bonzini assert(state == TERMINATING); 4287860a380SPaolo Bonzini state = TERMINATED; 4297860a380SPaolo Bonzini } 4307860a380SPaolo Bonzini 431d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 432e4afbf4fSFam Zheng 4330c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 434a61c6782SPaolo Bonzini { 435a61c6782SPaolo Bonzini nb_fds--; 4360c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 4377860a380SPaolo Bonzini state = TERMINATE; 4387860a380SPaolo Bonzini } 439d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 4407860a380SPaolo Bonzini nbd_client_put(client); 441a61c6782SPaolo Bonzini } 442a61c6782SPaolo Bonzini 443e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 444e4849c1dSDaniel P. Berrange gpointer opaque) 445a61c6782SPaolo Bonzini { 4467860a380SPaolo Bonzini if (state >= TERMINATE) { 447e4849c1dSDaniel P. Berrange return; 4487860a380SPaolo Bonzini } 4497860a380SPaolo Bonzini 450a61c6782SPaolo Bonzini nb_fds++; 451d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 452b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 453d0d6ff58SDaniel P. Berrange } 454d0d6ff58SDaniel P. Berrange 455d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 456e4afbf4fSFam Zheng { 457e4afbf4fSFam Zheng if (nbd_can_accept()) { 458e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 459e4afbf4fSFam Zheng } else { 460e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 461e4afbf4fSFam Zheng } 462e4afbf4fSFam Zheng } 463e4afbf4fSFam Zheng 46448bec07eSDaniel P. Berrange 465bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 46648bec07eSDaniel P. Berrange const char *bindto, 46748bec07eSDaniel P. Berrange const char *port) 46848bec07eSDaniel P. Berrange { 469bd269ebcSMarkus Armbruster SocketAddress *saddr; 47048bec07eSDaniel P. Berrange 471bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 47248bec07eSDaniel P. Berrange if (sockpath) { 473bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 474bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 47548bec07eSDaniel P. Berrange } else { 4760399293eSEric Blake InetSocketAddress *inet; 477bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 478bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 4790399293eSEric Blake inet->host = g_strdup(bindto); 48048bec07eSDaniel P. Berrange if (port) { 4810399293eSEric Blake inet->port = g_strdup(port); 48248bec07eSDaniel P. Berrange } else { 4830399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 48448bec07eSDaniel P. Berrange } 48548bec07eSDaniel P. Berrange } 48648bec07eSDaniel P. Berrange 48748bec07eSDaniel P. Berrange return saddr; 48848bec07eSDaniel P. Berrange } 48948bec07eSDaniel P. Berrange 49048bec07eSDaniel P. Berrange 49177c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 49277c9aaefSDaniel P. Berrange .name = "file", 49377c9aaefSDaniel P. Berrange .implied_opt_name = "file", 49477c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 49577c9aaefSDaniel P. Berrange .desc = { 49677c9aaefSDaniel P. Berrange /* no elements => accept any params */ 49777c9aaefSDaniel P. Berrange { /* end of list */ } 49877c9aaefSDaniel P. Berrange }, 49977c9aaefSDaniel P. Berrange }; 50077c9aaefSDaniel P. Berrange 5010ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 5020ab3b337SDaniel P. Berrange .name = "object", 5030ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 5040ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 5050ab3b337SDaniel P. Berrange .desc = { 5060ab3b337SDaniel P. Berrange { } 5070ab3b337SDaniel P. Berrange }, 5080ab3b337SDaniel P. Berrange }; 5090ab3b337SDaniel P. Berrange 5100ab3b337SDaniel P. Berrange 511145614a1SDaniel P. Berrange 51268b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 51368b96f15SEric Blake Error **errp) 514145614a1SDaniel P. Berrange { 515145614a1SDaniel P. Berrange Object *obj; 516145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 517145614a1SDaniel P. Berrange 518145614a1SDaniel P. Berrange obj = object_resolve_path_component( 519145614a1SDaniel P. Berrange object_get_objects_root(), id); 520145614a1SDaniel P. Berrange if (!obj) { 521145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 522145614a1SDaniel P. Berrange id); 523145614a1SDaniel P. Berrange return NULL; 524145614a1SDaniel P. Berrange } 525145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 526145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 527145614a1SDaniel P. Berrange if (!creds) { 528145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 529145614a1SDaniel P. Berrange id); 530145614a1SDaniel P. Berrange return NULL; 531145614a1SDaniel P. Berrange } 532145614a1SDaniel P. Berrange 53368b96f15SEric Blake if (list) { 53468b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 53568b96f15SEric Blake error_setg(errp, 53668b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 53768b96f15SEric Blake return NULL; 53868b96f15SEric Blake } 53968b96f15SEric Blake } else { 540145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 541145614a1SDaniel P. Berrange error_setg(errp, 542145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 543145614a1SDaniel P. Berrange return NULL; 544145614a1SDaniel P. Berrange } 54568b96f15SEric Blake } 546145614a1SDaniel P. Berrange object_ref(obj); 547145614a1SDaniel P. Berrange return creds; 548145614a1SDaniel P. Berrange } 549145614a1SDaniel P. Berrange 550a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 551a721f53bSRichard W.M. Jones { 552a721f53bSRichard W.M. Jones if (*address == NULL) { 553a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 554a721f53bSRichard W.M. Jones } 555a721f53bSRichard W.M. Jones 556a721f53bSRichard W.M. Jones if (*port == NULL) { 557a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 558a721f53bSRichard W.M. Jones } 559a721f53bSRichard W.M. Jones } 560a721f53bSRichard W.M. Jones 561a721f53bSRichard W.M. Jones /* 562a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 563a721f53bSRichard W.M. Jones */ 564a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 565a721f53bSRichard W.M. Jones const char *sockpath, 566a721f53bSRichard W.M. Jones const char *address, 56768b96f15SEric Blake const char *port, 56868b96f15SEric Blake bool list) 569a721f53bSRichard W.M. Jones { 570a721f53bSRichard W.M. Jones if (device != NULL) { 571a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 572a721f53bSRichard W.M. Jones } 573a721f53bSRichard W.M. Jones 574a721f53bSRichard W.M. Jones if (sockpath != NULL) { 575a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 576a721f53bSRichard W.M. Jones } 577a721f53bSRichard W.M. Jones 578a721f53bSRichard W.M. Jones if (address != NULL) { 579a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 580a721f53bSRichard W.M. Jones } 581a721f53bSRichard W.M. Jones 582a721f53bSRichard W.M. Jones if (port != NULL) { 583a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 584a721f53bSRichard W.M. Jones } 585a721f53bSRichard W.M. Jones 58668b96f15SEric Blake if (list) { 58768b96f15SEric Blake return "List mode is incompatible with socket activation"; 58868b96f15SEric Blake } 58968b96f15SEric Blake 590a721f53bSRichard W.M. Jones return NULL; 591a721f53bSRichard W.M. Jones } 592145614a1SDaniel P. Berrange 593b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 594b3b5299dSKevin Wolf { 595b3b5299dSKevin Wolf job_cancel_sync_all(); 596b3b5299dSKevin Wolf bdrv_close_all(); 597b3b5299dSKevin Wolf } 598b3b5299dSKevin Wolf 5997a5ca864Sbellard int main(int argc, char **argv) 6007a5ca864Sbellard { 60126f54e9aSMarkus Armbruster BlockBackend *blk; 6027a5ca864Sbellard BlockDriverState *bs; 6039d26dfcbSEric Blake uint64_t dev_offset = 0; 604dbb38caaSEric Blake bool readonly = false; 605cd831bd7Sths bool disconnect = false; 606a721f53bSRichard W.M. Jones const char *bindto = NULL; 60748bec07eSDaniel P. Berrange const char *port = NULL; 60848bec07eSDaniel P. Berrange char *sockpath = NULL; 609a6ac2313SPaolo Bonzini char *device = NULL; 6109d26dfcbSEric Blake int64_t fd_size; 6118c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 6128c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 61368b96f15SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:L"; 6147a5ca864Sbellard struct option lopt[] = { 615aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 616aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 617aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 618aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 619aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 620aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 621aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 622aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 623636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 624aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 625aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 62668b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 627aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 628aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 629aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 630aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 631aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 632aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 633aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 634aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 635aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 636aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 637aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 638aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 639aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 640aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 641b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 642aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 643b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 644aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 64539ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 646ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 647637bc5a5SMax Reitz { "pid-file", required_argument, NULL, QEMU_NBD_OPT_PID_FILE }, 648660f11beSBlue Swirl { NULL, 0, NULL, 0 } 6497a5ca864Sbellard }; 6507a5ca864Sbellard int ch; 6517a5ca864Sbellard int opt_ind = 0; 652f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 65343b51011SEric Blake int partition = 0; 6544fbec260SMax Reitz int ret = 0; 65539a5235cSPaolo Bonzini bool seen_cache = false; 656ded9d2d5SPaolo Bonzini bool seen_discard = false; 65739a5235cSPaolo Bonzini bool seen_aio = false; 658a517e88bSPaolo Bonzini pthread_t client_thread; 659e6b63677SDaniel P. Berrange const char *fmt = NULL; 66034b5d2c6SMax Reitz Error *local_err = NULL; 661b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 6624fbec260SMax Reitz QDict *options = NULL; 66368b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 664b1a75b33SEric Blake const char *export_description = NULL; 665636192c4SEric Blake const char *bitmap = NULL; 666145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 66777c9aaefSDaniel P. Berrange bool imageOpts = false; 6686effd5bfSKevin Wolf bool writethrough = true; 66939ca463eSDenis V. Lunev char *trace_file = NULL; 670ffb31e1dSMax Reitz bool fork_process = false; 67168b96f15SEric Blake bool list = false; 672ffb31e1dSMax Reitz int old_stderr = -1; 673a721f53bSRichard W.M. Jones unsigned socket_activation; 674637bc5a5SMax Reitz const char *pid_file_name = NULL; 6757a5ca864Sbellard 676a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 677a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 678a517e88bSPaolo Bonzini */ 679bb345110SPaolo Bonzini struct sigaction sa_sigterm; 680bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 681bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 682bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 683c2297088SDaniel P. Berrange 684041e32b8SMax Reitz #ifdef CONFIG_POSIX 685041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 686041e32b8SMax Reitz #endif 687041e32b8SMax Reitz 688f5852efaSChristophe Fergeau error_init(argv[0]); 689fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 690e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 691c2297088SDaniel P. Berrange 6920ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 6930ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 69439ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 69510f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 696bb345110SPaolo Bonzini 6977a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 6987a5ca864Sbellard switch (ch) { 6997a5ca864Sbellard case 's': 7002f726488Sths flags |= BDRV_O_SNAPSHOT; 7012f726488Sths break; 7022f726488Sths case 'n': 70339a5235cSPaolo Bonzini optarg = (char *) "none"; 70439a5235cSPaolo Bonzini /* fallthrough */ 70539a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 70639a5235cSPaolo Bonzini if (seen_cache) { 70785b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 70885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 70939a5235cSPaolo Bonzini } 71039a5235cSPaolo Bonzini seen_cache = true; 7116effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 71285b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 71385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 71439a5235cSPaolo Bonzini } 7157a5ca864Sbellard break; 71639a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 71739a5235cSPaolo Bonzini if (seen_aio) { 71885b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 71985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 72039a5235cSPaolo Bonzini } 72139a5235cSPaolo Bonzini seen_aio = true; 72239a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 72339a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 72439a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 72539a5235cSPaolo Bonzini /* this is the default */ 72639a5235cSPaolo Bonzini } else { 72785b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 72885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 72939a5235cSPaolo Bonzini } 73039a5235cSPaolo Bonzini break; 731ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 732ded9d2d5SPaolo Bonzini if (seen_discard) { 73385b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 73485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 735ded9d2d5SPaolo Bonzini } 736ded9d2d5SPaolo Bonzini seen_discard = true; 737ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 73885b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 73985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 740ded9d2d5SPaolo Bonzini } 741ded9d2d5SPaolo Bonzini break; 742b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 743b3838a40SPeter Lieven detect_zeroes = 744f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 745b3838a40SPeter Lieven optarg, 746b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 747b3838a40SPeter Lieven &local_err); 748b3838a40SPeter Lieven if (local_err) { 749c29b77f9SMarkus Armbruster error_reportf_err(local_err, 750c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 75185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 752b3838a40SPeter Lieven } 753b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 754b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 75585b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 756b3838a40SPeter Lieven "without setting discard operation to unmap"); 75785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 758b3838a40SPeter Lieven } 759b3838a40SPeter Lieven break; 7607a5ca864Sbellard case 'b': 7617a5ca864Sbellard bindto = optarg; 7627a5ca864Sbellard break; 7637a5ca864Sbellard case 'p': 76448bec07eSDaniel P. Berrange port = optarg; 7657a5ca864Sbellard break; 7667a5ca864Sbellard case 'o': 76743b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 76843b51011SEric Blake error_report("Invalid offset '%s'", optarg); 76985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7707a5ca864Sbellard } 7717a5ca864Sbellard break; 7728c116b0eSWenchao Xia case 'l': 7738c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 77470b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 77570b94331SMarkus Armbruster optarg, false); 7768c116b0eSWenchao Xia if (!sn_opts) { 77785b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 7788c116b0eSWenchao Xia optarg); 77985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7808c116b0eSWenchao Xia } 7818c116b0eSWenchao Xia } else { 7828c116b0eSWenchao Xia sn_id_or_name = optarg; 7838c116b0eSWenchao Xia } 7848c116b0eSWenchao Xia /* fall through */ 7857a5ca864Sbellard case 'r': 786dbb38caaSEric Blake readonly = true; 78707108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 7887a5ca864Sbellard break; 7897a5ca864Sbellard case 'P': 7900ae2d546SEric Blake warn_report("The '-P' option is deprecated; use --image-opts with " 7910ae2d546SEric Blake "a raw device wrapper for subset exports instead"); 79243b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &partition) < 0 || 79343b51011SEric Blake partition < 1 || partition > 8) { 79443b51011SEric Blake error_report("Invalid partition '%s'", optarg); 79585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 796713cc671SPeter Lieven } 7977a5ca864Sbellard break; 798636192c4SEric Blake case 'B': 799636192c4SEric Blake bitmap = optarg; 800636192c4SEric Blake break; 801cd831bd7Sths case 'k': 802b32f6c28SPaolo Bonzini sockpath = optarg; 803713cc671SPeter Lieven if (sockpath[0] != '/') { 8049af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 80585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 806713cc671SPeter Lieven } 807cd831bd7Sths break; 808cd831bd7Sths case 'd': 809cd831bd7Sths disconnect = true; 810cd831bd7Sths break; 811cd831bd7Sths case 'c': 812cd831bd7Sths device = optarg; 813cd831bd7Sths break; 8143b05a8e9Sths case 'e': 81543b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 81643b51011SEric Blake shared < 1) { 81785b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 81885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8193b05a8e9Sths } 8203b05a8e9Sths break; 821e6b63677SDaniel P. Berrange case 'f': 822e6b63677SDaniel P. Berrange fmt = optarg; 823e6b63677SDaniel P. Berrange break; 82475818250Sths case 't': 82575818250Sths persistent = 1; 82675818250Sths break; 8273d4b2f9cSDaniel P. Berrange case 'x': 8283d4b2f9cSDaniel P. Berrange export_name = optarg; 8293d4b2f9cSDaniel P. Berrange break; 830b1a75b33SEric Blake case 'D': 831b1a75b33SEric Blake export_description = optarg; 832b1a75b33SEric Blake break; 8337a5ca864Sbellard case 'v': 8347a5ca864Sbellard verbose = 1; 8357a5ca864Sbellard break; 8367a5ca864Sbellard case 'V': 8377a5ca864Sbellard version(argv[0]); 8387a5ca864Sbellard exit(0); 8397a5ca864Sbellard break; 8407a5ca864Sbellard case 'h': 8417a5ca864Sbellard usage(argv[0]); 8427a5ca864Sbellard exit(0); 8437a5ca864Sbellard break; 8447a5ca864Sbellard case '?': 84585b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 84685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8470ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 8480ab3b337SDaniel P. Berrange QemuOpts *opts; 8490ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 8500ab3b337SDaniel P. Berrange optarg, true); 8510ab3b337SDaniel P. Berrange if (!opts) { 8520ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 8530ab3b337SDaniel P. Berrange } 8540ab3b337SDaniel P. Berrange } break; 855145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 856145614a1SDaniel P. Berrange tlscredsid = optarg; 857145614a1SDaniel P. Berrange break; 85877c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 85977c9aaefSDaniel P. Berrange imageOpts = true; 86077c9aaefSDaniel P. Berrange break; 86139ca463eSDenis V. Lunev case 'T': 86239ca463eSDenis V. Lunev g_free(trace_file); 86339ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 86439ca463eSDenis V. Lunev break; 865b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 866b25e12daSDaniel P. Berrange tlsauthz = optarg; 867b25e12daSDaniel P. Berrange break; 868ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 869ffb31e1dSMax Reitz fork_process = true; 870ffb31e1dSMax Reitz break; 87168b96f15SEric Blake case 'L': 87268b96f15SEric Blake list = true; 87368b96f15SEric Blake break; 874637bc5a5SMax Reitz case QEMU_NBD_OPT_PID_FILE: 875637bc5a5SMax Reitz pid_file_name = optarg; 876637bc5a5SMax Reitz break; 8777a5ca864Sbellard } 8787a5ca864Sbellard } 8797a5ca864Sbellard 88068b96f15SEric Blake if (list) { 88168b96f15SEric Blake if (argc != optind) { 88268b96f15SEric Blake error_report("List mode is incompatible with a file name"); 88368b96f15SEric Blake exit(EXIT_FAILURE); 88468b96f15SEric Blake } 88568b96f15SEric Blake if (export_name || export_description || dev_offset || partition || 88668b96f15SEric Blake device || disconnect || fmt || sn_id_or_name || bitmap || 88768b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 88868b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 88968b96f15SEric Blake exit(EXIT_FAILURE); 89068b96f15SEric Blake } 89168b96f15SEric Blake if (fork_process) { 89268b96f15SEric Blake error_report("List mode is incompatible with forking"); 89368b96f15SEric Blake exit(EXIT_FAILURE); 89468b96f15SEric Blake } 89568b96f15SEric Blake } else if ((argc - optind) != 1) { 896433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 897433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 89885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 89968b96f15SEric Blake } else if (!export_name) { 90068b96f15SEric Blake export_name = ""; 9017a5ca864Sbellard } 9027a5ca864Sbellard 9037e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 9040ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 9057e1e0c11SMarkus Armbruster NULL, &error_fatal); 9060ab3b337SDaniel P. Berrange 90739ca463eSDenis V. Lunev if (!trace_init_backends()) { 90839ca463eSDenis V. Lunev exit(1); 90939ca463eSDenis V. Lunev } 91039ca463eSDenis V. Lunev trace_init_file(trace_file); 91139ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 91239ca463eSDenis V. Lunev 913a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 914a721f53bSRichard W.M. Jones if (socket_activation == 0) { 915a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 916a721f53bSRichard W.M. Jones } else { 917a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 918a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 91968b96f15SEric Blake bindto, port, 92068b96f15SEric Blake list); 921a721f53bSRichard W.M. Jones if (err_msg != NULL) { 922a721f53bSRichard W.M. Jones error_report("%s", err_msg); 923a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 924a721f53bSRichard W.M. Jones } 92553fabd4bSPaolo Bonzini 92653fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 92753fabd4bSPaolo Bonzini if (socket_activation > 1) { 92853fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 92953fabd4bSPaolo Bonzini "LISTEN_FDS"); 93053fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 93153fabd4bSPaolo Bonzini } 932a721f53bSRichard W.M. Jones } 933a721f53bSRichard W.M. Jones 934145614a1SDaniel P. Berrange if (tlscredsid) { 935145614a1SDaniel P. Berrange if (sockpath) { 936145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 937145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 938145614a1SDaniel P. Berrange } 939145614a1SDaniel P. Berrange if (device) { 940145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 941145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 942145614a1SDaniel P. Berrange } 943b25e12daSDaniel P. Berrange if (tlsauthz && list) { 944b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 945b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 946b25e12daSDaniel P. Berrange } 94768b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 948145614a1SDaniel P. Berrange if (local_err) { 949145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 950145614a1SDaniel P. Berrange error_get_pretty(local_err)); 951145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 952145614a1SDaniel P. Berrange } 953b25e12daSDaniel P. Berrange } else { 954b25e12daSDaniel P. Berrange if (tlsauthz) { 955b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 956b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 957b25e12daSDaniel P. Berrange } 958145614a1SDaniel P. Berrange } 959145614a1SDaniel P. Berrange 96068b96f15SEric Blake if (list) { 96168b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 96268b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 96368b96f15SEric Blake } 96468b96f15SEric Blake 9653c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 9663c1fa35dSEric Blake if (disconnect || device) { 9673c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 9683c1fa35dSEric Blake exit(EXIT_FAILURE); 9693c1fa35dSEric Blake } 9703c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 971cd831bd7Sths if (disconnect) { 972d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 973d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 97485b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 97585b01e09SMarkus Armbruster strerror(errno)); 97685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 977fc19f8a0SPaolo Bonzini } 978d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 979cd831bd7Sths 980d0d6ff58SDaniel P. Berrange close(nbdfd); 981cd831bd7Sths 982cd831bd7Sths printf("%s disconnected\n", argv[optind]); 983cd831bd7Sths 984cd831bd7Sths return 0; 985cd831bd7Sths } 9863c1fa35dSEric Blake #endif 987cd831bd7Sths 988ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 989c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 990c1f8fdc3SPaolo Bonzini pid_t pid; 991c1f8fdc3SPaolo Bonzini int ret; 992c1f8fdc3SPaolo Bonzini 993fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 99485b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 99585b01e09SMarkus Armbruster strerror(errno)); 99685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 997c1f8fdc3SPaolo Bonzini } 998c1f8fdc3SPaolo Bonzini 999c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 1000c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 1001c1f8fdc3SPaolo Bonzini */ 1002c1f8fdc3SPaolo Bonzini pid = fork(); 100370d4739eSMax Reitz if (pid < 0) { 100485b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 100585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 100670d4739eSMax Reitz } else if (pid == 0) { 1007c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 1008e6df58a5SMax Reitz 1009e6df58a5SMax Reitz old_stderr = dup(STDERR_FILENO); 10109faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 1011c1f8fdc3SPaolo Bonzini 1012c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 1013c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 1014fc19f8a0SPaolo Bonzini if (ret < 0) { 101585b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 101685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1017c1f8fdc3SPaolo Bonzini } 1018c1f8fdc3SPaolo Bonzini 1019c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 1020c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1021c1f8fdc3SPaolo Bonzini } else { 1022c1f8fdc3SPaolo Bonzini bool errors = false; 1023c1f8fdc3SPaolo Bonzini char *buf; 1024c1f8fdc3SPaolo Bonzini 1025c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 1026c1f8fdc3SPaolo Bonzini * it closes the pipe. 1027c1f8fdc3SPaolo Bonzini */ 1028c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1029c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 1030c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 1031c1f8fdc3SPaolo Bonzini errors = true; 1032c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 1033fc19f8a0SPaolo Bonzini if (ret < 0) { 1034c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 1035c1f8fdc3SPaolo Bonzini } 1036c1f8fdc3SPaolo Bonzini } 1037fc19f8a0SPaolo Bonzini if (ret < 0) { 103885b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 103985b01e09SMarkus Armbruster strerror(errno)); 104085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1041c1f8fdc3SPaolo Bonzini } 1042c1f8fdc3SPaolo Bonzini 1043c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 1044c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 1045c1f8fdc3SPaolo Bonzini */ 1046c1f8fdc3SPaolo Bonzini exit(errors); 1047c1f8fdc3SPaolo Bonzini } 1048c1f8fdc3SPaolo Bonzini } 1049c1f8fdc3SPaolo Bonzini 1050a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 1051b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 1052b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 1053cd831bd7Sths } 1054cd831bd7Sths 1055e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1056a721f53bSRichard W.M. Jones if (socket_activation == 0) { 105748bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 1058fc8135c6SJuan Quintela if (qio_net_listener_open_sync(server, saddr, 1, &local_err) < 0) { 1059e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1060a721f53bSRichard W.M. Jones error_report_err(local_err); 1061e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1062a721f53bSRichard W.M. Jones } 1063a721f53bSRichard W.M. Jones } else { 1064e4849c1dSDaniel P. Berrange size_t i; 1065a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1066e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1067e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1068e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1069a721f53bSRichard W.M. Jones &local_err); 1070e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1071e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1072a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 1073a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 1074a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1075a721f53bSRichard W.M. Jones } 1076e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1077e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1078e4849c1dSDaniel P. Berrange } 1079a721f53bSRichard W.M. Jones } 108048bec07eSDaniel P. Berrange 10812f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 1082565f65d2SMarkus Armbruster error_report_err(local_err); 10832f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 10842f78e491SChrysostomos Nanakos } 1085802ddc37SPaolo Bonzini bdrv_init(); 1086b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1087802ddc37SPaolo Bonzini 108877c9aaefSDaniel P. Berrange srcpath = argv[optind]; 108977c9aaefSDaniel P. Berrange if (imageOpts) { 109077c9aaefSDaniel P. Berrange QemuOpts *opts; 109177c9aaefSDaniel P. Berrange if (fmt) { 109277c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 109377c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 109477c9aaefSDaniel P. Berrange } 109577c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 109677c9aaefSDaniel P. Berrange if (!opts) { 109777c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 109877c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 109977c9aaefSDaniel P. Berrange } 110077c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 110177c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1102efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 110377c9aaefSDaniel P. Berrange } else { 1104e6b63677SDaniel P. Berrange if (fmt) { 11054fbec260SMax Reitz options = qdict_new(); 110646f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1107e6b63677SDaniel P. Berrange } 1108efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 110977c9aaefSDaniel P. Berrange } 111077c9aaefSDaniel P. Berrange 11114fbec260SMax Reitz if (!blk) { 1112c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1113c29b77f9SMarkus Armbruster argv[optind]); 111485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1115802ddc37SPaolo Bonzini } 11164fbec260SMax Reitz bs = blk_bs(blk); 1117802ddc37SPaolo Bonzini 11186effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11196effd5bfSKevin Wolf 11208c116b0eSWenchao Xia if (sn_opts) { 11218c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11228c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11238c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11248c116b0eSWenchao Xia &local_err); 11258c116b0eSWenchao Xia } else if (sn_id_or_name) { 11268c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11278c116b0eSWenchao Xia &local_err); 11288c116b0eSWenchao Xia } 11298c116b0eSWenchao Xia if (ret < 0) { 1130c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 113185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11328c116b0eSWenchao Xia } 11338c116b0eSWenchao Xia 1134b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 11354c58e80aSMax Reitz fd_size = blk_getlength(blk); 113698f44bbeSMax Reitz if (fd_size < 0) { 113785b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 113898f44bbeSMax Reitz strerror(-fd_size)); 113985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 114098f44bbeSMax Reitz } 1141802ddc37SPaolo Bonzini 1142e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 11439d26dfcbSEric Blake error_report("Offset (%" PRIu64 ") has to be smaller than the image " 11449d26dfcbSEric Blake "size (%" PRId64 ")", dev_offset, fd_size); 1145e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1146e424b655STomáš Golembiovský } 1147e424b655STomáš Golembiovský fd_size -= dev_offset; 1148e424b655STomáš Golembiovský 114943b51011SEric Blake if (partition) { 11509d26dfcbSEric Blake uint64_t limit; 11514485936bSEric Blake 11524485936bSEric Blake if (dev_offset) { 11534485936bSEric Blake error_report("Cannot request partition and offset together"); 11544485936bSEric Blake exit(EXIT_FAILURE); 11554485936bSEric Blake } 11564485936bSEric Blake ret = find_partition(blk, partition, &dev_offset, &limit); 1157185b4338SPaolo Bonzini if (ret < 0) { 115885b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1159a4699e55SMarkus Armbruster strerror(-ret)); 116085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1161802ddc37SPaolo Bonzini } 11624485936bSEric Blake /* 11634485936bSEric Blake * MBR partition limits are (32-bit << 9); this assert lets 11649d26dfcbSEric Blake * the compiler know that we can't overflow 64 bits. 11654485936bSEric Blake */ 11669d26dfcbSEric Blake assert(dev_offset + limit >= dev_offset); 11674485936bSEric Blake if (dev_offset + limit > fd_size) { 11689d26dfcbSEric Blake error_report("Discovered partition %d at offset %" PRIu64 11699d26dfcbSEric Blake " size %" PRIu64 ", but size exceeds file length %" 11709d26dfcbSEric Blake PRId64, partition, dev_offset, limit, fd_size); 11714485936bSEric Blake exit(EXIT_FAILURE); 11724485936bSEric Blake } 11734485936bSEric Blake fd_size = limit; 1174185b4338SPaolo Bonzini } 1175802ddc37SPaolo Bonzini 11763fa4c765SEric Blake export = nbd_export_new(bs, dev_offset, fd_size, export_name, 1177dbb38caaSEric Blake export_description, bitmap, readonly, shared > 1, 1178678ba275SEric Blake nbd_export_closed, writethrough, NULL, 1179678ba275SEric Blake &error_fatal); 11803b05a8e9Sths 1181f1ef5555SPaolo Bonzini if (device) { 11823c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1183f1ef5555SPaolo Bonzini int ret; 1184f1ef5555SPaolo Bonzini 1185a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1186f1ef5555SPaolo Bonzini if (ret != 0) { 118785b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 118885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1189f1ef5555SPaolo Bonzini } 11903c1fa35dSEric Blake #endif 1191f1ef5555SPaolo Bonzini } else { 1192f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1193f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1194f1ef5555SPaolo Bonzini } 1195f1ef5555SPaolo Bonzini 1196d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11977a5ca864Sbellard 1198637bc5a5SMax Reitz if (pid_file_name) { 1199637bc5a5SMax Reitz qemu_write_pidfile(pid_file_name, &error_fatal); 1200637bc5a5SMax Reitz } 1201637bc5a5SMax Reitz 12029faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 12039faf31b6SMichael Tokarev * to free any busy filesystems */ 12049faf31b6SMichael Tokarev if (chdir("/") < 0) { 120585b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 120685b01e09SMarkus Armbruster strerror(errno)); 120785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 12089faf31b6SMichael Tokarev } 12099faf31b6SMichael Tokarev 1210ffb31e1dSMax Reitz if (fork_process) { 1211ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1212ffb31e1dSMax Reitz close(old_stderr); 1213ffb31e1dSMax Reitz } 1214ffb31e1dSMax Reitz 12157860a380SPaolo Bonzini state = RUNNING; 12163b05a8e9Sths do { 1217a61c6782SPaolo Bonzini main_loop_wait(false); 12187860a380SPaolo Bonzini if (state == TERMINATE) { 12197860a380SPaolo Bonzini state = TERMINATING; 12209d976580SPhilippe Mathieu-Daudé nbd_export_close(export); 12219d976580SPhilippe Mathieu-Daudé nbd_export_put(export); 12229d976580SPhilippe Mathieu-Daudé export = NULL; 12237860a380SPaolo Bonzini } 12247860a380SPaolo Bonzini } while (state != TERMINATED); 12252c8d9f06SPaolo Bonzini 122626f54e9aSMarkus Armbruster blk_unref(blk); 1227b32f6c28SPaolo Bonzini if (sockpath) { 1228b32f6c28SPaolo Bonzini unlink(sockpath); 1229b32f6c28SPaolo Bonzini } 12307a5ca864Sbellard 12318c116b0eSWenchao Xia qemu_opts_del(sn_opts); 12328c116b0eSWenchao Xia 1233a517e88bSPaolo Bonzini if (device) { 1234a517e88bSPaolo Bonzini void *ret; 1235a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1236a517e88bSPaolo Bonzini exit(ret != NULL); 1237a517e88bSPaolo Bonzini } else { 1238a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1239a517e88bSPaolo Bonzini } 12407a5ca864Sbellard } 1241