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 24da34e65cSMarkus Armbruster #include "qapi/error.h" 25f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2626f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 27b3838a40SPeter Lieven #include "block/block_int.h" 28737e150eSPaolo Bonzini #include "block/nbd.h" 296a1751b7SAlex Bligh #include "qemu/main-loop.h" 30922a01a0SMarkus Armbruster #include "qemu/option.h" 31537b41f5SPaolo Bonzini #include "qemu/error-report.h" 320ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3358369e22SPaolo Bonzini #include "qemu/bswap.h" 3439ca463eSDenis V. Lunev #include "qemu/log.h" 3553fabd4bSPaolo Bonzini #include "qemu/systemd.h" 368c116b0eSWenchao Xia #include "block/snapshot.h" 37452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 38d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 390ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 40d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 41e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 42c2297088SDaniel P. Berrange #include "crypto/init.h" 4339ca463eSDenis V. Lunev #include "trace/control.h" 44be377133SEric Blake #include "qemu-version.h" 457a5ca864Sbellard 463c1fa35dSEric Blake #ifdef __linux__ 473c1fa35dSEric Blake #define HAVE_NBD_DEVICE 1 483c1fa35dSEric Blake #else 493c1fa35dSEric Blake #define HAVE_NBD_DEVICE 0 503c1fa35dSEric Blake #endif 513c1fa35dSEric Blake 52cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 53fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 54fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 55fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 56fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 57fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 58fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 59fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 60ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 61*b25e12daSDaniel P. Berrange #define QEMU_NBD_OPT_TLSAUTHZ 264 627a5ca864Sbellard 63bd31c214SEric Blake #define MBR_SIZE 512 64bd31c214SEric Blake 659d976580SPhilippe Mathieu-Daudé static NBDExport *export; 66b1d8e52eSblueswir1 static int verbose; 67a517e88bSPaolo Bonzini static char *srcpath; 68bd269ebcSMarkus Armbruster static SocketAddress *saddr; 697860a380SPaolo Bonzini static int persistent = 0; 707860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 71a61c6782SPaolo Bonzini static int shared = 1; 72a61c6782SPaolo Bonzini static int nb_fds; 73e4849c1dSDaniel P. Berrange static QIONetListener *server; 74145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 75*b25e12daSDaniel P. Berrange static const char *tlsauthz; 767a5ca864Sbellard 777a5ca864Sbellard static void usage(const char *name) 787a5ca864Sbellard { 79b033cd86SPaolo Bonzini (printf) ( 807a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 8168b96f15SEric Blake " or: %s -L [OPTIONS]\n" 8268b96f15SEric Blake "QEMU Disk Network Block Device Utility\n" 837a5ca864Sbellard "\n" 847a5ca864Sbellard " -h, --help display this help and exit\n" 857a5ca864Sbellard " -V, --version output version information and exit\n" 867a5ca864Sbellard "\n" 87b033cd86SPaolo Bonzini "Connection properties:\n" 88b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 89b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 90b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 91b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 92b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 93b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 94b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 95f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 96f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 97b033cd86SPaolo Bonzini "\n" 98b033cd86SPaolo Bonzini "Exposing part of the image:\n" 99b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 100b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 101636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 102b033cd86SPaolo Bonzini "\n" 1030ab3b337SDaniel P. Berrange "General purpose options:\n" 10468b96f15SEric Blake " -L, --list list exports available from another NBD server\n" 1050ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1060ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 107f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 108*b25e12daSDaniel P. Berrange " --tls-authz=ID use id of an earlier --object to provide\n" 109*b25e12daSDaniel P. Berrange " authorization\n" 11039ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 11139ca463eSDenis V. Lunev " specify tracing options\n" 112ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 113ffb31e1dSMax Reitz " once the server is running\n" 1143c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1153c1fa35dSEric Blake "\n" 116b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 117b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 118b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 119b033cd86SPaolo Bonzini #endif 120b033cd86SPaolo Bonzini "\n" 121b033cd86SPaolo Bonzini "Block device options:\n" 1224323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 123b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1248c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1258c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1268c116b0eSWenchao Xia " the temporary one\n" 1278c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1288c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1298c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1308c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1318c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 132b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 13339a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 13439a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 135b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1366883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 13777c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 138b033cd86SPaolo Bonzini "\n" 139f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 14068b96f15SEric Blake , name, name, NBD_DEFAULT_PORT, "DEVICE"); 1417a5ca864Sbellard } 1427a5ca864Sbellard 1437a5ca864Sbellard static void version(const char *name) 1447a5ca864Sbellard { 1457a5ca864Sbellard printf( 1467e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1477a5ca864Sbellard "Written by Anthony Liguori.\n" 1487a5ca864Sbellard "\n" 149be377133SEric Blake QEMU_COPYRIGHT "\n" 1507a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1517a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 152315bc7aaSths , name); 1537a5ca864Sbellard } 1547a5ca864Sbellard 1557a5ca864Sbellard struct partition_record 1567a5ca864Sbellard { 1577a5ca864Sbellard uint8_t bootable; 1587a5ca864Sbellard uint8_t start_head; 1597a5ca864Sbellard uint32_t start_cylinder; 1607a5ca864Sbellard uint8_t start_sector; 1617a5ca864Sbellard uint8_t system; 1627a5ca864Sbellard uint8_t end_head; 1637a5ca864Sbellard uint8_t end_cylinder; 1647a5ca864Sbellard uint8_t end_sector; 1657a5ca864Sbellard uint32_t start_sector_abs; 1667a5ca864Sbellard uint32_t nb_sectors_abs; 1677a5ca864Sbellard }; 1687a5ca864Sbellard 1697a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1707a5ca864Sbellard { 1717a5ca864Sbellard r->bootable = p[0]; 1727a5ca864Sbellard r->start_head = p[1]; 1737a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1747a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1757a5ca864Sbellard r->system = p[4]; 1767a5ca864Sbellard r->end_head = p[5]; 1777a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1787a5ca864Sbellard r->end_sector = p[6] & 0x3f; 179ac97393dSMax Reitz 180773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 181773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1827a5ca864Sbellard } 1837a5ca864Sbellard 1844c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1859d26dfcbSEric Blake uint64_t *offset, uint64_t *size) 1867a5ca864Sbellard { 1877a5ca864Sbellard struct partition_record mbr[4]; 188bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1897a5ca864Sbellard int i; 1907a5ca864Sbellard int ext_partnum = 4; 191cb7cf0e3SRyota Ozaki int ret; 1927a5ca864Sbellard 193bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 194bd31c214SEric Blake if (ret < 0) { 195a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 19685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 197cb7cf0e3SRyota Ozaki } 1987a5ca864Sbellard 1997a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 200185b4338SPaolo Bonzini return -EINVAL; 2017a5ca864Sbellard } 2027a5ca864Sbellard 2037a5ca864Sbellard for (i = 0; i < 4; i++) { 2047a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 2057a5ca864Sbellard 206453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 2077a5ca864Sbellard continue; 208453b07b1SMax Reitz } 2097a5ca864Sbellard 2107a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 2117a5ca864Sbellard struct partition_record ext[4]; 212bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2137a5ca864Sbellard int j; 2147a5ca864Sbellard 215bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 216bd31c214SEric Blake data1, sizeof(data1)); 217bd31c214SEric Blake if (ret < 0) { 218a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 21985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 220cb7cf0e3SRyota Ozaki } 2217a5ca864Sbellard 2227a5ca864Sbellard for (j = 0; j < 4; j++) { 2237a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 224453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2257a5ca864Sbellard continue; 226453b07b1SMax Reitz } 2277a5ca864Sbellard 2287a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2297a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2307a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2317a5ca864Sbellard return 0; 2327a5ca864Sbellard } 2337a5ca864Sbellard } 2347a5ca864Sbellard ext_partnum += 4; 2357a5ca864Sbellard } else if ((i + 1) == partition) { 2367a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2377a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2387a5ca864Sbellard return 0; 2397a5ca864Sbellard } 2407a5ca864Sbellard } 2417a5ca864Sbellard 242185b4338SPaolo Bonzini return -ENOENT; 2437a5ca864Sbellard } 2447a5ca864Sbellard 245bb345110SPaolo Bonzini static void termsig_handler(int signum) 246bb345110SPaolo Bonzini { 24723994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 248a61c6782SPaolo Bonzini qemu_notify_event(); 249bb345110SPaolo Bonzini } 250bb345110SPaolo Bonzini 251537b41f5SPaolo Bonzini 25268b96f15SEric Blake static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls, 25368b96f15SEric Blake const char *hostname) 25468b96f15SEric Blake { 25568b96f15SEric Blake int ret = EXIT_FAILURE; 25668b96f15SEric Blake int rc; 25768b96f15SEric Blake Error *err = NULL; 25868b96f15SEric Blake QIOChannelSocket *sioc; 25968b96f15SEric Blake NBDExportInfo *list; 26068b96f15SEric Blake int i, j; 26168b96f15SEric Blake 26268b96f15SEric Blake sioc = qio_channel_socket_new(); 26368b96f15SEric Blake if (qio_channel_socket_connect_sync(sioc, saddr, &err) < 0) { 26468b96f15SEric Blake error_report_err(err); 26568b96f15SEric Blake return EXIT_FAILURE; 26668b96f15SEric Blake } 26768b96f15SEric Blake rc = nbd_receive_export_list(QIO_CHANNEL(sioc), tls, hostname, &list, 26868b96f15SEric Blake &err); 26968b96f15SEric Blake if (rc < 0) { 27068b96f15SEric Blake if (err) { 27168b96f15SEric Blake error_report_err(err); 27268b96f15SEric Blake } 27368b96f15SEric Blake goto out; 27468b96f15SEric Blake } 27568b96f15SEric Blake printf("exports available: %d\n", rc); 27668b96f15SEric Blake for (i = 0; i < rc; i++) { 27768b96f15SEric Blake printf(" export: '%s'\n", list[i].name); 27868b96f15SEric Blake if (list[i].description && *list[i].description) { 27968b96f15SEric Blake printf(" description: %s\n", list[i].description); 28068b96f15SEric Blake } 28168b96f15SEric Blake if (list[i].flags & NBD_FLAG_HAS_FLAGS) { 28268b96f15SEric Blake printf(" size: %" PRIu64 "\n", list[i].size); 28368b96f15SEric Blake printf(" flags: 0x%x (", list[i].flags); 28468b96f15SEric Blake if (list[i].flags & NBD_FLAG_READ_ONLY) { 28568b96f15SEric Blake printf(" readonly"); 28668b96f15SEric Blake } 28768b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_FLUSH) { 28868b96f15SEric Blake printf(" flush"); 28968b96f15SEric Blake } 29068b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_FUA) { 29168b96f15SEric Blake printf(" fua"); 29268b96f15SEric Blake } 29368b96f15SEric Blake if (list[i].flags & NBD_FLAG_ROTATIONAL) { 29468b96f15SEric Blake printf(" rotational"); 29568b96f15SEric Blake } 29668b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_TRIM) { 29768b96f15SEric Blake printf(" trim"); 29868b96f15SEric Blake } 29968b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_WRITE_ZEROES) { 30068b96f15SEric Blake printf(" zeroes"); 30168b96f15SEric Blake } 30268b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_DF) { 30368b96f15SEric Blake printf(" df"); 30468b96f15SEric Blake } 30568b96f15SEric Blake if (list[i].flags & NBD_FLAG_CAN_MULTI_CONN) { 30668b96f15SEric Blake printf(" multi"); 30768b96f15SEric Blake } 30868b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_RESIZE) { 30968b96f15SEric Blake printf(" resize"); 31068b96f15SEric Blake } 31168b96f15SEric Blake if (list[i].flags & NBD_FLAG_SEND_CACHE) { 31268b96f15SEric Blake printf(" cache"); 31368b96f15SEric Blake } 31468b96f15SEric Blake printf(" )\n"); 31568b96f15SEric Blake } 31668b96f15SEric Blake if (list[i].min_block) { 31768b96f15SEric Blake printf(" min block: %u\n", list[i].min_block); 31868b96f15SEric Blake printf(" opt block: %u\n", list[i].opt_block); 31968b96f15SEric Blake printf(" max block: %u\n", list[i].max_block); 32068b96f15SEric Blake } 32168b96f15SEric Blake if (list[i].n_contexts) { 32268b96f15SEric Blake printf(" available meta contexts: %d\n", list[i].n_contexts); 32368b96f15SEric Blake for (j = 0; j < list[i].n_contexts; j++) { 32468b96f15SEric Blake printf(" %s\n", list[i].contexts[j]); 32568b96f15SEric Blake } 32668b96f15SEric Blake } 32768b96f15SEric Blake } 32868b96f15SEric Blake nbd_free_export_list(list, rc); 32968b96f15SEric Blake 33068b96f15SEric Blake ret = EXIT_SUCCESS; 33168b96f15SEric Blake out: 33268b96f15SEric Blake object_unref(OBJECT(sioc)); 33368b96f15SEric Blake return ret; 33468b96f15SEric Blake } 33568b96f15SEric Blake 33668b96f15SEric Blake 3373c1fa35dSEric Blake #if HAVE_NBD_DEVICE 338a517e88bSPaolo Bonzini static void *show_parts(void *arg) 339cd831bd7Sths { 340a6ac2313SPaolo Bonzini char *device = arg; 341cd831bd7Sths int nbd; 342cd831bd7Sths 343cd831bd7Sths /* linux just needs an open() to trigger 344cd831bd7Sths * the partition table update 345cd831bd7Sths * but remember to load the module with max_part != 0 : 346cd831bd7Sths * modprobe nbd max_part=63 347cd831bd7Sths */ 348cd831bd7Sths nbd = open(device, O_RDWR); 349fc19f8a0SPaolo Bonzini if (nbd >= 0) { 350cd831bd7Sths close(nbd); 351cd831bd7Sths } 352a517e88bSPaolo Bonzini return NULL; 353a517e88bSPaolo Bonzini } 354a517e88bSPaolo Bonzini 355a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 356a517e88bSPaolo Bonzini { 357a6ac2313SPaolo Bonzini char *device = arg; 3586dc1667dSEric Blake NBDExportInfo info = { .request_sizes = false, .name = g_strdup("") }; 359d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 360d0d6ff58SDaniel P. Berrange int fd; 361a517e88bSPaolo Bonzini int ret; 362a517e88bSPaolo Bonzini pthread_t show_parts_thread; 3631ce52846SMax Reitz Error *local_error = NULL; 364a517e88bSPaolo Bonzini 365d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 366d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 367d0d6ff58SDaniel P. Berrange saddr, 368d0d6ff58SDaniel P. Berrange &local_error) < 0) { 36948bec07eSDaniel P. Berrange error_report_err(local_error); 370a517e88bSPaolo Bonzini goto out; 371a517e88bSPaolo Bonzini } 372a517e88bSPaolo Bonzini 3736dc1667dSEric Blake ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), 374004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 375fc19f8a0SPaolo Bonzini if (ret < 0) { 3761ce52846SMax Reitz if (local_error) { 37778288671SMarkus Armbruster error_report_err(local_error); 3781ce52846SMax Reitz } 3790c544d73SPaolo Bonzini goto out_socket; 380a517e88bSPaolo Bonzini } 381a517e88bSPaolo Bonzini 382a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 383fc19f8a0SPaolo Bonzini if (fd < 0) { 384a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 385b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 3860c544d73SPaolo Bonzini goto out_socket; 387a6ac2313SPaolo Bonzini } 388a6ac2313SPaolo Bonzini 389004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 390fc19f8a0SPaolo Bonzini if (ret < 0) { 391be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 3920c544d73SPaolo Bonzini goto out_fd; 393a517e88bSPaolo Bonzini } 394a517e88bSPaolo Bonzini 395a517e88bSPaolo Bonzini /* update partition table */ 396a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 397a517e88bSPaolo Bonzini 398c1f8fdc3SPaolo Bonzini if (verbose) { 399a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 400a517e88bSPaolo Bonzini device, srcpath); 401c1f8fdc3SPaolo Bonzini } else { 402c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 403c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 404c1f8fdc3SPaolo Bonzini } 405a517e88bSPaolo Bonzini 406a517e88bSPaolo Bonzini ret = nbd_client(fd); 407a517e88bSPaolo Bonzini if (ret) { 4080c544d73SPaolo Bonzini goto out_fd; 409a517e88bSPaolo Bonzini } 410a517e88bSPaolo Bonzini close(fd); 411d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 4126dc1667dSEric Blake g_free(info.name); 413a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 414a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 415a517e88bSPaolo Bonzini 4160c544d73SPaolo Bonzini out_fd: 4170c544d73SPaolo Bonzini close(fd); 4180c544d73SPaolo Bonzini out_socket: 419d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 420a517e88bSPaolo Bonzini out: 4216dc1667dSEric Blake g_free(info.name); 422a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 423a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 424cd831bd7Sths } 4253c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 426cd831bd7Sths 427e4afbf4fSFam Zheng static int nbd_can_accept(void) 428a61c6782SPaolo Bonzini { 429df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 430a61c6782SPaolo Bonzini } 431a61c6782SPaolo Bonzini 4329d976580SPhilippe Mathieu-Daudé static void nbd_export_closed(NBDExport *export) 4337860a380SPaolo Bonzini { 4347860a380SPaolo Bonzini assert(state == TERMINATING); 4357860a380SPaolo Bonzini state = TERMINATED; 4367860a380SPaolo Bonzini } 4377860a380SPaolo Bonzini 438d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 439e4afbf4fSFam Zheng 4400c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 441a61c6782SPaolo Bonzini { 442a61c6782SPaolo Bonzini nb_fds--; 4430c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 4447860a380SPaolo Bonzini state = TERMINATE; 4457860a380SPaolo Bonzini } 446d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 4477860a380SPaolo Bonzini nbd_client_put(client); 448a61c6782SPaolo Bonzini } 449a61c6782SPaolo Bonzini 450e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 451e4849c1dSDaniel P. Berrange gpointer opaque) 452a61c6782SPaolo Bonzini { 4537860a380SPaolo Bonzini if (state >= TERMINATE) { 454e4849c1dSDaniel P. Berrange return; 4557860a380SPaolo Bonzini } 4567860a380SPaolo Bonzini 457a61c6782SPaolo Bonzini nb_fds++; 458d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 459*b25e12daSDaniel P. Berrange nbd_client_new(cioc, tlscreds, tlsauthz, nbd_client_closed); 460d0d6ff58SDaniel P. Berrange } 461d0d6ff58SDaniel P. Berrange 462d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 463e4afbf4fSFam Zheng { 464e4afbf4fSFam Zheng if (nbd_can_accept()) { 465e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 466e4afbf4fSFam Zheng } else { 467e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 468e4afbf4fSFam Zheng } 469e4afbf4fSFam Zheng } 470e4afbf4fSFam Zheng 47148bec07eSDaniel P. Berrange 472bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 47348bec07eSDaniel P. Berrange const char *bindto, 47448bec07eSDaniel P. Berrange const char *port) 47548bec07eSDaniel P. Berrange { 476bd269ebcSMarkus Armbruster SocketAddress *saddr; 47748bec07eSDaniel P. Berrange 478bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 47948bec07eSDaniel P. Berrange if (sockpath) { 480bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 481bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 48248bec07eSDaniel P. Berrange } else { 4830399293eSEric Blake InetSocketAddress *inet; 484bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 485bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 4860399293eSEric Blake inet->host = g_strdup(bindto); 48748bec07eSDaniel P. Berrange if (port) { 4880399293eSEric Blake inet->port = g_strdup(port); 48948bec07eSDaniel P. Berrange } else { 4900399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 49148bec07eSDaniel P. Berrange } 49248bec07eSDaniel P. Berrange } 49348bec07eSDaniel P. Berrange 49448bec07eSDaniel P. Berrange return saddr; 49548bec07eSDaniel P. Berrange } 49648bec07eSDaniel P. Berrange 49748bec07eSDaniel P. Berrange 49877c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 49977c9aaefSDaniel P. Berrange .name = "file", 50077c9aaefSDaniel P. Berrange .implied_opt_name = "file", 50177c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 50277c9aaefSDaniel P. Berrange .desc = { 50377c9aaefSDaniel P. Berrange /* no elements => accept any params */ 50477c9aaefSDaniel P. Berrange { /* end of list */ } 50577c9aaefSDaniel P. Berrange }, 50677c9aaefSDaniel P. Berrange }; 50777c9aaefSDaniel P. Berrange 5080ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 5090ab3b337SDaniel P. Berrange .name = "object", 5100ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 5110ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 5120ab3b337SDaniel P. Berrange .desc = { 5130ab3b337SDaniel P. Berrange { } 5140ab3b337SDaniel P. Berrange }, 5150ab3b337SDaniel P. Berrange }; 5160ab3b337SDaniel P. Berrange 5170ab3b337SDaniel P. Berrange 518145614a1SDaniel P. Berrange 51968b96f15SEric Blake static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list, 52068b96f15SEric Blake Error **errp) 521145614a1SDaniel P. Berrange { 522145614a1SDaniel P. Berrange Object *obj; 523145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 524145614a1SDaniel P. Berrange 525145614a1SDaniel P. Berrange obj = object_resolve_path_component( 526145614a1SDaniel P. Berrange object_get_objects_root(), id); 527145614a1SDaniel P. Berrange if (!obj) { 528145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 529145614a1SDaniel P. Berrange id); 530145614a1SDaniel P. Berrange return NULL; 531145614a1SDaniel P. Berrange } 532145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 533145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 534145614a1SDaniel P. Berrange if (!creds) { 535145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 536145614a1SDaniel P. Berrange id); 537145614a1SDaniel P. Berrange return NULL; 538145614a1SDaniel P. Berrange } 539145614a1SDaniel P. Berrange 54068b96f15SEric Blake if (list) { 54168b96f15SEric Blake if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 54268b96f15SEric Blake error_setg(errp, 54368b96f15SEric Blake "Expecting TLS credentials with a client endpoint"); 54468b96f15SEric Blake return NULL; 54568b96f15SEric Blake } 54668b96f15SEric Blake } else { 547145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 548145614a1SDaniel P. Berrange error_setg(errp, 549145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 550145614a1SDaniel P. Berrange return NULL; 551145614a1SDaniel P. Berrange } 55268b96f15SEric Blake } 553145614a1SDaniel P. Berrange object_ref(obj); 554145614a1SDaniel P. Berrange return creds; 555145614a1SDaniel P. Berrange } 556145614a1SDaniel P. Berrange 557a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 558a721f53bSRichard W.M. Jones { 559a721f53bSRichard W.M. Jones if (*address == NULL) { 560a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 561a721f53bSRichard W.M. Jones } 562a721f53bSRichard W.M. Jones 563a721f53bSRichard W.M. Jones if (*port == NULL) { 564a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 565a721f53bSRichard W.M. Jones } 566a721f53bSRichard W.M. Jones } 567a721f53bSRichard W.M. Jones 568a721f53bSRichard W.M. Jones /* 569a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 570a721f53bSRichard W.M. Jones */ 571a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 572a721f53bSRichard W.M. Jones const char *sockpath, 573a721f53bSRichard W.M. Jones const char *address, 57468b96f15SEric Blake const char *port, 57568b96f15SEric Blake bool list) 576a721f53bSRichard W.M. Jones { 577a721f53bSRichard W.M. Jones if (device != NULL) { 578a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 579a721f53bSRichard W.M. Jones } 580a721f53bSRichard W.M. Jones 581a721f53bSRichard W.M. Jones if (sockpath != NULL) { 582a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 583a721f53bSRichard W.M. Jones } 584a721f53bSRichard W.M. Jones 585a721f53bSRichard W.M. Jones if (address != NULL) { 586a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 587a721f53bSRichard W.M. Jones } 588a721f53bSRichard W.M. Jones 589a721f53bSRichard W.M. Jones if (port != NULL) { 590a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 591a721f53bSRichard W.M. Jones } 592a721f53bSRichard W.M. Jones 59368b96f15SEric Blake if (list) { 59468b96f15SEric Blake return "List mode is incompatible with socket activation"; 59568b96f15SEric Blake } 59668b96f15SEric Blake 597a721f53bSRichard W.M. Jones return NULL; 598a721f53bSRichard W.M. Jones } 599145614a1SDaniel P. Berrange 600b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 601b3b5299dSKevin Wolf { 602b3b5299dSKevin Wolf job_cancel_sync_all(); 603b3b5299dSKevin Wolf bdrv_close_all(); 604b3b5299dSKevin Wolf } 605b3b5299dSKevin Wolf 6067a5ca864Sbellard int main(int argc, char **argv) 6077a5ca864Sbellard { 60826f54e9aSMarkus Armbruster BlockBackend *blk; 6097a5ca864Sbellard BlockDriverState *bs; 6109d26dfcbSEric Blake uint64_t dev_offset = 0; 6117423f417SEric Blake uint16_t nbdflags = 0; 612cd831bd7Sths bool disconnect = false; 613a721f53bSRichard W.M. Jones const char *bindto = NULL; 61448bec07eSDaniel P. Berrange const char *port = NULL; 61548bec07eSDaniel P. Berrange char *sockpath = NULL; 616a6ac2313SPaolo Bonzini char *device = NULL; 6179d26dfcbSEric Blake int64_t fd_size; 6188c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 6198c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 62068b96f15SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:L"; 6217a5ca864Sbellard struct option lopt[] = { 622aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 623aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 624aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 625aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 626aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 627aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 628aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 629aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 630636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 631aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 632aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 63368b96f15SEric Blake { "list", no_argument, NULL, 'L' }, 634aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 635aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 636aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 637aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 638aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 639aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 640aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 641aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 642aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 643aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 644aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 645aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 646aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 647aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 648b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 649aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 650*b25e12daSDaniel P. Berrange { "tls-authz", required_argument, NULL, QEMU_NBD_OPT_TLSAUTHZ }, 651aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 65239ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 653ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 654660f11beSBlue Swirl { NULL, 0, NULL, 0 } 6557a5ca864Sbellard }; 6567a5ca864Sbellard int ch; 6577a5ca864Sbellard int opt_ind = 0; 658f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 65943b51011SEric Blake int partition = 0; 6604fbec260SMax Reitz int ret = 0; 66139a5235cSPaolo Bonzini bool seen_cache = false; 662ded9d2d5SPaolo Bonzini bool seen_discard = false; 66339a5235cSPaolo Bonzini bool seen_aio = false; 664a517e88bSPaolo Bonzini pthread_t client_thread; 665e6b63677SDaniel P. Berrange const char *fmt = NULL; 66634b5d2c6SMax Reitz Error *local_err = NULL; 667b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 6684fbec260SMax Reitz QDict *options = NULL; 66968b96f15SEric Blake const char *export_name = NULL; /* defaults to "" later for server mode */ 670b1a75b33SEric Blake const char *export_description = NULL; 671636192c4SEric Blake const char *bitmap = NULL; 672145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 67377c9aaefSDaniel P. Berrange bool imageOpts = false; 6746effd5bfSKevin Wolf bool writethrough = true; 67539ca463eSDenis V. Lunev char *trace_file = NULL; 676ffb31e1dSMax Reitz bool fork_process = false; 67768b96f15SEric Blake bool list = false; 678ffb31e1dSMax Reitz int old_stderr = -1; 679a721f53bSRichard W.M. Jones unsigned socket_activation; 6807a5ca864Sbellard 681a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 682a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 683a517e88bSPaolo Bonzini */ 684bb345110SPaolo Bonzini struct sigaction sa_sigterm; 685bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 686bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 687bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 688c2297088SDaniel P. Berrange 689041e32b8SMax Reitz #ifdef CONFIG_POSIX 690041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 691041e32b8SMax Reitz #endif 692041e32b8SMax Reitz 693fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 6943ba1b7baSEric Blake error_set_progname(argv[0]); 695e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 696c2297088SDaniel P. Berrange 6970ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 6980ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 69939ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 70010f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 701bb345110SPaolo Bonzini 7027a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 7037a5ca864Sbellard switch (ch) { 7047a5ca864Sbellard case 's': 7052f726488Sths flags |= BDRV_O_SNAPSHOT; 7062f726488Sths break; 7072f726488Sths case 'n': 70839a5235cSPaolo Bonzini optarg = (char *) "none"; 70939a5235cSPaolo Bonzini /* fallthrough */ 71039a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 71139a5235cSPaolo Bonzini if (seen_cache) { 71285b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 71385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 71439a5235cSPaolo Bonzini } 71539a5235cSPaolo Bonzini seen_cache = true; 7166effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 71785b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 71885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 71939a5235cSPaolo Bonzini } 7207a5ca864Sbellard break; 72139a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 72239a5235cSPaolo Bonzini if (seen_aio) { 72385b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 72485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 72539a5235cSPaolo Bonzini } 72639a5235cSPaolo Bonzini seen_aio = true; 72739a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 72839a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 72939a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 73039a5235cSPaolo Bonzini /* this is the default */ 73139a5235cSPaolo Bonzini } else { 73285b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 73385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 73439a5235cSPaolo Bonzini } 73539a5235cSPaolo Bonzini break; 736ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 737ded9d2d5SPaolo Bonzini if (seen_discard) { 73885b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 73985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 740ded9d2d5SPaolo Bonzini } 741ded9d2d5SPaolo Bonzini seen_discard = true; 742ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 74385b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 74485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 745ded9d2d5SPaolo Bonzini } 746ded9d2d5SPaolo Bonzini break; 747b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 748b3838a40SPeter Lieven detect_zeroes = 749f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 750b3838a40SPeter Lieven optarg, 751b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 752b3838a40SPeter Lieven &local_err); 753b3838a40SPeter Lieven if (local_err) { 754c29b77f9SMarkus Armbruster error_reportf_err(local_err, 755c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 75685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 757b3838a40SPeter Lieven } 758b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 759b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 76085b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 761b3838a40SPeter Lieven "without setting discard operation to unmap"); 76285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 763b3838a40SPeter Lieven } 764b3838a40SPeter Lieven break; 7657a5ca864Sbellard case 'b': 7667a5ca864Sbellard bindto = optarg; 7677a5ca864Sbellard break; 7687a5ca864Sbellard case 'p': 76948bec07eSDaniel P. Berrange port = optarg; 7707a5ca864Sbellard break; 7717a5ca864Sbellard case 'o': 77243b51011SEric Blake if (qemu_strtou64(optarg, NULL, 0, &dev_offset) < 0) { 77343b51011SEric Blake error_report("Invalid offset '%s'", optarg); 77485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7757a5ca864Sbellard } 7767a5ca864Sbellard break; 7778c116b0eSWenchao Xia case 'l': 7788c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 77970b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 78070b94331SMarkus Armbruster optarg, false); 7818c116b0eSWenchao Xia if (!sn_opts) { 78285b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 7838c116b0eSWenchao Xia optarg); 78485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7858c116b0eSWenchao Xia } 7868c116b0eSWenchao Xia } else { 7878c116b0eSWenchao Xia sn_id_or_name = optarg; 7888c116b0eSWenchao Xia } 7898c116b0eSWenchao Xia /* fall through */ 7907a5ca864Sbellard case 'r': 791b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 79207108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 7937a5ca864Sbellard break; 7947a5ca864Sbellard case 'P': 7950ae2d546SEric Blake warn_report("The '-P' option is deprecated; use --image-opts with " 7960ae2d546SEric Blake "a raw device wrapper for subset exports instead"); 79743b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &partition) < 0 || 79843b51011SEric Blake partition < 1 || partition > 8) { 79943b51011SEric Blake error_report("Invalid partition '%s'", optarg); 80085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 801713cc671SPeter Lieven } 8027a5ca864Sbellard break; 803636192c4SEric Blake case 'B': 804636192c4SEric Blake bitmap = optarg; 805636192c4SEric Blake break; 806cd831bd7Sths case 'k': 807b32f6c28SPaolo Bonzini sockpath = optarg; 808713cc671SPeter Lieven if (sockpath[0] != '/') { 8099af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 81085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 811713cc671SPeter Lieven } 812cd831bd7Sths break; 813cd831bd7Sths case 'd': 814cd831bd7Sths disconnect = true; 815cd831bd7Sths break; 816cd831bd7Sths case 'c': 817cd831bd7Sths device = optarg; 818cd831bd7Sths break; 8193b05a8e9Sths case 'e': 82043b51011SEric Blake if (qemu_strtoi(optarg, NULL, 0, &shared) < 0 || 82143b51011SEric Blake shared < 1) { 82285b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 82385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8243b05a8e9Sths } 8253b05a8e9Sths break; 826e6b63677SDaniel P. Berrange case 'f': 827e6b63677SDaniel P. Berrange fmt = optarg; 828e6b63677SDaniel P. Berrange break; 82975818250Sths case 't': 83075818250Sths persistent = 1; 83175818250Sths break; 8323d4b2f9cSDaniel P. Berrange case 'x': 8333d4b2f9cSDaniel P. Berrange export_name = optarg; 8343d4b2f9cSDaniel P. Berrange break; 835b1a75b33SEric Blake case 'D': 836b1a75b33SEric Blake export_description = optarg; 837b1a75b33SEric Blake break; 8387a5ca864Sbellard case 'v': 8397a5ca864Sbellard verbose = 1; 8407a5ca864Sbellard break; 8417a5ca864Sbellard case 'V': 8427a5ca864Sbellard version(argv[0]); 8437a5ca864Sbellard exit(0); 8447a5ca864Sbellard break; 8457a5ca864Sbellard case 'h': 8467a5ca864Sbellard usage(argv[0]); 8477a5ca864Sbellard exit(0); 8487a5ca864Sbellard break; 8497a5ca864Sbellard case '?': 85085b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 85185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8520ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 8530ab3b337SDaniel P. Berrange QemuOpts *opts; 8540ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 8550ab3b337SDaniel P. Berrange optarg, true); 8560ab3b337SDaniel P. Berrange if (!opts) { 8570ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 8580ab3b337SDaniel P. Berrange } 8590ab3b337SDaniel P. Berrange } break; 860145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 861145614a1SDaniel P. Berrange tlscredsid = optarg; 862145614a1SDaniel P. Berrange break; 86377c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 86477c9aaefSDaniel P. Berrange imageOpts = true; 86577c9aaefSDaniel P. Berrange break; 86639ca463eSDenis V. Lunev case 'T': 86739ca463eSDenis V. Lunev g_free(trace_file); 86839ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 86939ca463eSDenis V. Lunev break; 870*b25e12daSDaniel P. Berrange case QEMU_NBD_OPT_TLSAUTHZ: 871*b25e12daSDaniel P. Berrange tlsauthz = optarg; 872*b25e12daSDaniel P. Berrange break; 873ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 874ffb31e1dSMax Reitz fork_process = true; 875ffb31e1dSMax Reitz break; 87668b96f15SEric Blake case 'L': 87768b96f15SEric Blake list = true; 87868b96f15SEric Blake break; 8797a5ca864Sbellard } 8807a5ca864Sbellard } 8817a5ca864Sbellard 88268b96f15SEric Blake if (list) { 88368b96f15SEric Blake if (argc != optind) { 88468b96f15SEric Blake error_report("List mode is incompatible with a file name"); 88568b96f15SEric Blake exit(EXIT_FAILURE); 88668b96f15SEric Blake } 88768b96f15SEric Blake if (export_name || export_description || dev_offset || partition || 88868b96f15SEric Blake device || disconnect || fmt || sn_id_or_name || bitmap || 88968b96f15SEric Blake seen_aio || seen_discard || seen_cache) { 89068b96f15SEric Blake error_report("List mode is incompatible with per-device settings"); 89168b96f15SEric Blake exit(EXIT_FAILURE); 89268b96f15SEric Blake } 89368b96f15SEric Blake if (fork_process) { 89468b96f15SEric Blake error_report("List mode is incompatible with forking"); 89568b96f15SEric Blake exit(EXIT_FAILURE); 89668b96f15SEric Blake } 89768b96f15SEric Blake } else if ((argc - optind) != 1) { 898433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 899433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 90085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 90168b96f15SEric Blake } else if (!export_name) { 90268b96f15SEric Blake export_name = ""; 9037a5ca864Sbellard } 9047a5ca864Sbellard 9057e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 9060ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 9077e1e0c11SMarkus Armbruster NULL, &error_fatal); 9080ab3b337SDaniel P. Berrange 90939ca463eSDenis V. Lunev if (!trace_init_backends()) { 91039ca463eSDenis V. Lunev exit(1); 91139ca463eSDenis V. Lunev } 91239ca463eSDenis V. Lunev trace_init_file(trace_file); 91339ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 91439ca463eSDenis V. Lunev 915a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 916a721f53bSRichard W.M. Jones if (socket_activation == 0) { 917a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 918a721f53bSRichard W.M. Jones } else { 919a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 920a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 92168b96f15SEric Blake bindto, port, 92268b96f15SEric Blake list); 923a721f53bSRichard W.M. Jones if (err_msg != NULL) { 924a721f53bSRichard W.M. Jones error_report("%s", err_msg); 925a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 926a721f53bSRichard W.M. Jones } 92753fabd4bSPaolo Bonzini 92853fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 92953fabd4bSPaolo Bonzini if (socket_activation > 1) { 93053fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 93153fabd4bSPaolo Bonzini "LISTEN_FDS"); 93253fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 93353fabd4bSPaolo Bonzini } 934a721f53bSRichard W.M. Jones } 935a721f53bSRichard W.M. Jones 936145614a1SDaniel P. Berrange if (tlscredsid) { 937145614a1SDaniel P. Berrange if (sockpath) { 938145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 939145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 940145614a1SDaniel P. Berrange } 941145614a1SDaniel P. Berrange if (device) { 942145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 943145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 944145614a1SDaniel P. Berrange } 945*b25e12daSDaniel P. Berrange if (tlsauthz && list) { 946*b25e12daSDaniel P. Berrange error_report("TLS authorization is incompatible with export list"); 947*b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 948*b25e12daSDaniel P. Berrange } 94968b96f15SEric Blake tlscreds = nbd_get_tls_creds(tlscredsid, list, &local_err); 950145614a1SDaniel P. Berrange if (local_err) { 951145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 952145614a1SDaniel P. Berrange error_get_pretty(local_err)); 953145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 954145614a1SDaniel P. Berrange } 955*b25e12daSDaniel P. Berrange } else { 956*b25e12daSDaniel P. Berrange if (tlsauthz) { 957*b25e12daSDaniel P. Berrange error_report("--tls-authz is not permitted without --tls-creds"); 958*b25e12daSDaniel P. Berrange exit(EXIT_FAILURE); 959*b25e12daSDaniel P. Berrange } 960145614a1SDaniel P. Berrange } 961145614a1SDaniel P. Berrange 96268b96f15SEric Blake if (list) { 96368b96f15SEric Blake saddr = nbd_build_socket_address(sockpath, bindto, port); 96468b96f15SEric Blake return qemu_nbd_client_list(saddr, tlscreds, bindto); 96568b96f15SEric Blake } 96668b96f15SEric Blake 9673c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 9683c1fa35dSEric Blake if (disconnect || device) { 9693c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 9703c1fa35dSEric Blake exit(EXIT_FAILURE); 9713c1fa35dSEric Blake } 9723c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 973cd831bd7Sths if (disconnect) { 974d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 975d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 97685b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 97785b01e09SMarkus Armbruster strerror(errno)); 97885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 979fc19f8a0SPaolo Bonzini } 980d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 981cd831bd7Sths 982d0d6ff58SDaniel P. Berrange close(nbdfd); 983cd831bd7Sths 984cd831bd7Sths printf("%s disconnected\n", argv[optind]); 985cd831bd7Sths 986cd831bd7Sths return 0; 987cd831bd7Sths } 9883c1fa35dSEric Blake #endif 989cd831bd7Sths 990ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 991c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 992c1f8fdc3SPaolo Bonzini pid_t pid; 993c1f8fdc3SPaolo Bonzini int ret; 994c1f8fdc3SPaolo Bonzini 995fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 99685b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 99785b01e09SMarkus Armbruster strerror(errno)); 99885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 999c1f8fdc3SPaolo Bonzini } 1000c1f8fdc3SPaolo Bonzini 1001c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 1002c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 1003c1f8fdc3SPaolo Bonzini */ 1004c1f8fdc3SPaolo Bonzini pid = fork(); 100570d4739eSMax Reitz if (pid < 0) { 100685b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 100785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 100870d4739eSMax Reitz } else if (pid == 0) { 1009c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 10109faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 1011c1f8fdc3SPaolo Bonzini 1012c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 1013ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 1014c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 1015fc19f8a0SPaolo Bonzini if (ret < 0) { 101685b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 101785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1018c1f8fdc3SPaolo Bonzini } 1019c1f8fdc3SPaolo Bonzini 1020c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 1021c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1022c1f8fdc3SPaolo Bonzini } else { 1023c1f8fdc3SPaolo Bonzini bool errors = false; 1024c1f8fdc3SPaolo Bonzini char *buf; 1025c1f8fdc3SPaolo Bonzini 1026c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 1027c1f8fdc3SPaolo Bonzini * it closes the pipe. 1028c1f8fdc3SPaolo Bonzini */ 1029c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 1030c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 1031c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 1032c1f8fdc3SPaolo Bonzini errors = true; 1033c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 1034fc19f8a0SPaolo Bonzini if (ret < 0) { 1035c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 1036c1f8fdc3SPaolo Bonzini } 1037c1f8fdc3SPaolo Bonzini } 1038fc19f8a0SPaolo Bonzini if (ret < 0) { 103985b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 104085b01e09SMarkus Armbruster strerror(errno)); 104185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1042c1f8fdc3SPaolo Bonzini } 1043c1f8fdc3SPaolo Bonzini 1044c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 1045c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 1046c1f8fdc3SPaolo Bonzini */ 1047c1f8fdc3SPaolo Bonzini exit(errors); 1048c1f8fdc3SPaolo Bonzini } 1049c1f8fdc3SPaolo Bonzini } 1050c1f8fdc3SPaolo Bonzini 1051a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 1052b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 1053b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 1054cd831bd7Sths } 1055cd831bd7Sths 1056e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 1057a721f53bSRichard W.M. Jones if (socket_activation == 0) { 105848bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 1059e4849c1dSDaniel P. Berrange if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { 1060e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1061a721f53bSRichard W.M. Jones error_report_err(local_err); 1062e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 1063a721f53bSRichard W.M. Jones } 1064a721f53bSRichard W.M. Jones } else { 1065e4849c1dSDaniel P. Berrange size_t i; 1066a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 1067e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 1068e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 1069e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 1070a721f53bSRichard W.M. Jones &local_err); 1071e4849c1dSDaniel P. Berrange if (sioc == NULL) { 1072e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 1073a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 1074a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 1075a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 1076a721f53bSRichard W.M. Jones } 1077e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 1078e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 1079e4849c1dSDaniel P. Berrange } 1080a721f53bSRichard W.M. Jones } 108148bec07eSDaniel P. Berrange 10822f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 1083565f65d2SMarkus Armbruster error_report_err(local_err); 10842f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 10852f78e491SChrysostomos Nanakos } 1086802ddc37SPaolo Bonzini bdrv_init(); 1087b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 1088802ddc37SPaolo Bonzini 108977c9aaefSDaniel P. Berrange srcpath = argv[optind]; 109077c9aaefSDaniel P. Berrange if (imageOpts) { 109177c9aaefSDaniel P. Berrange QemuOpts *opts; 109277c9aaefSDaniel P. Berrange if (fmt) { 109377c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 109477c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 109577c9aaefSDaniel P. Berrange } 109677c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 109777c9aaefSDaniel P. Berrange if (!opts) { 109877c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 109977c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 110077c9aaefSDaniel P. Berrange } 110177c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 110277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 1103efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 110477c9aaefSDaniel P. Berrange } else { 1105e6b63677SDaniel P. Berrange if (fmt) { 11064fbec260SMax Reitz options = qdict_new(); 110746f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 1108e6b63677SDaniel P. Berrange } 1109efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 111077c9aaefSDaniel P. Berrange } 111177c9aaefSDaniel P. Berrange 11124fbec260SMax Reitz if (!blk) { 1113c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 1114c29b77f9SMarkus Armbruster argv[optind]); 111585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1116802ddc37SPaolo Bonzini } 11174fbec260SMax Reitz bs = blk_bs(blk); 1118802ddc37SPaolo Bonzini 11196effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 11206effd5bfSKevin Wolf 11218c116b0eSWenchao Xia if (sn_opts) { 11228c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 11238c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 11248c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 11258c116b0eSWenchao Xia &local_err); 11268c116b0eSWenchao Xia } else if (sn_id_or_name) { 11278c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 11288c116b0eSWenchao Xia &local_err); 11298c116b0eSWenchao Xia } 11308c116b0eSWenchao Xia if (ret < 0) { 1131c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 113285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 11338c116b0eSWenchao Xia } 11348c116b0eSWenchao Xia 1135b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 11364c58e80aSMax Reitz fd_size = blk_getlength(blk); 113798f44bbeSMax Reitz if (fd_size < 0) { 113885b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 113998f44bbeSMax Reitz strerror(-fd_size)); 114085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 114198f44bbeSMax Reitz } 1142802ddc37SPaolo Bonzini 1143e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 11449d26dfcbSEric Blake error_report("Offset (%" PRIu64 ") has to be smaller than the image " 11459d26dfcbSEric Blake "size (%" PRId64 ")", dev_offset, fd_size); 1146e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1147e424b655STomáš Golembiovský } 1148e424b655STomáš Golembiovský fd_size -= dev_offset; 1149e424b655STomáš Golembiovský 115043b51011SEric Blake if (partition) { 11519d26dfcbSEric Blake uint64_t limit; 11524485936bSEric Blake 11534485936bSEric Blake if (dev_offset) { 11544485936bSEric Blake error_report("Cannot request partition and offset together"); 11554485936bSEric Blake exit(EXIT_FAILURE); 11564485936bSEric Blake } 11574485936bSEric Blake ret = find_partition(blk, partition, &dev_offset, &limit); 1158185b4338SPaolo Bonzini if (ret < 0) { 115985b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1160a4699e55SMarkus Armbruster strerror(-ret)); 116185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1162802ddc37SPaolo Bonzini } 11634485936bSEric Blake /* 11644485936bSEric Blake * MBR partition limits are (32-bit << 9); this assert lets 11659d26dfcbSEric Blake * the compiler know that we can't overflow 64 bits. 11664485936bSEric Blake */ 11679d26dfcbSEric Blake assert(dev_offset + limit >= dev_offset); 11684485936bSEric Blake if (dev_offset + limit > fd_size) { 11699d26dfcbSEric Blake error_report("Discovered partition %d at offset %" PRIu64 11709d26dfcbSEric Blake " size %" PRIu64 ", but size exceeds file length %" 11719d26dfcbSEric Blake PRId64, partition, dev_offset, limit, fd_size); 11724485936bSEric Blake exit(EXIT_FAILURE); 11734485936bSEric Blake } 11744485936bSEric Blake fd_size = limit; 1175185b4338SPaolo Bonzini } 1176802ddc37SPaolo Bonzini 11773fa4c765SEric Blake export = nbd_export_new(bs, dev_offset, fd_size, export_name, 1178636192c4SEric Blake export_description, bitmap, nbdflags, 1179678ba275SEric Blake nbd_export_closed, writethrough, NULL, 1180678ba275SEric Blake &error_fatal); 11813b05a8e9Sths 1182f1ef5555SPaolo Bonzini if (device) { 11833c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1184f1ef5555SPaolo Bonzini int ret; 1185f1ef5555SPaolo Bonzini 1186a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1187f1ef5555SPaolo Bonzini if (ret != 0) { 118885b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 118985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1190f1ef5555SPaolo Bonzini } 11913c1fa35dSEric Blake #endif 1192f1ef5555SPaolo Bonzini } else { 1193f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1194f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1195f1ef5555SPaolo Bonzini } 1196f1ef5555SPaolo Bonzini 1197d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 11987a5ca864Sbellard 11999faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 12009faf31b6SMichael Tokarev * to free any busy filesystems */ 12019faf31b6SMichael Tokarev if (chdir("/") < 0) { 120285b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 120385b01e09SMarkus Armbruster strerror(errno)); 120485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 12059faf31b6SMichael Tokarev } 12069faf31b6SMichael Tokarev 1207ffb31e1dSMax Reitz if (fork_process) { 1208ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1209ffb31e1dSMax Reitz close(old_stderr); 1210ffb31e1dSMax Reitz } 1211ffb31e1dSMax Reitz 12127860a380SPaolo Bonzini state = RUNNING; 12133b05a8e9Sths do { 1214a61c6782SPaolo Bonzini main_loop_wait(false); 12157860a380SPaolo Bonzini if (state == TERMINATE) { 12167860a380SPaolo Bonzini state = TERMINATING; 12179d976580SPhilippe Mathieu-Daudé nbd_export_close(export); 12189d976580SPhilippe Mathieu-Daudé nbd_export_put(export); 12199d976580SPhilippe Mathieu-Daudé export = NULL; 12207860a380SPaolo Bonzini } 12217860a380SPaolo Bonzini } while (state != TERMINATED); 12222c8d9f06SPaolo Bonzini 122326f54e9aSMarkus Armbruster blk_unref(blk); 1224b32f6c28SPaolo Bonzini if (sockpath) { 1225b32f6c28SPaolo Bonzini unlink(sockpath); 1226b32f6c28SPaolo Bonzini } 12277a5ca864Sbellard 12288c116b0eSWenchao Xia qemu_opts_del(sn_opts); 12298c116b0eSWenchao Xia 1230a517e88bSPaolo Bonzini if (device) { 1231a517e88bSPaolo Bonzini void *ret; 1232a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1233a517e88bSPaolo Bonzini exit(ret != NULL); 1234a517e88bSPaolo Bonzini } else { 1235a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1236a517e88bSPaolo Bonzini } 12377a5ca864Sbellard } 1238