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 617a5ca864Sbellard 62bd31c214SEric Blake #define MBR_SIZE 512 63bd31c214SEric Blake 649d976580SPhilippe Mathieu-Daudé static NBDExport *export; 65b1d8e52eSblueswir1 static int verbose; 66a517e88bSPaolo Bonzini static char *srcpath; 67bd269ebcSMarkus Armbruster static SocketAddress *saddr; 687860a380SPaolo Bonzini static int persistent = 0; 697860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 70a61c6782SPaolo Bonzini static int shared = 1; 71a61c6782SPaolo Bonzini static int nb_fds; 72e4849c1dSDaniel P. Berrange static QIONetListener *server; 73145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 747a5ca864Sbellard 757a5ca864Sbellard static void usage(const char *name) 767a5ca864Sbellard { 77b033cd86SPaolo Bonzini (printf) ( 787a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 797a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 807a5ca864Sbellard "\n" 817a5ca864Sbellard " -h, --help display this help and exit\n" 827a5ca864Sbellard " -V, --version output version information and exit\n" 837a5ca864Sbellard "\n" 84b033cd86SPaolo Bonzini "Connection properties:\n" 85b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 86b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 87b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 88b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 89b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 90b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 91b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 92f5cd0bb5SVladimir Sementsov-Ogievskiy " -x, --export-name=NAME expose export by name (default is empty string)\n" 93f5cd0bb5SVladimir Sementsov-Ogievskiy " -D, --description=TEXT export a human-readable description\n" 94b033cd86SPaolo Bonzini "\n" 95b033cd86SPaolo Bonzini "Exposing part of the image:\n" 96b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 97b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 98*636192c4SEric Blake " -B, --bitmap=NAME expose a persistent dirty bitmap\n" 99b033cd86SPaolo Bonzini "\n" 1000ab3b337SDaniel P. Berrange "General purpose options:\n" 1010ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 1020ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 103f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 10439ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 10539ca463eSDenis V. Lunev " specify tracing options\n" 106ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 107ffb31e1dSMax Reitz " once the server is running\n" 1083c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1093c1fa35dSEric Blake "\n" 110b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 111b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 112b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 113b033cd86SPaolo Bonzini #endif 114b033cd86SPaolo Bonzini "\n" 115b033cd86SPaolo Bonzini "Block device options:\n" 1164323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 117b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1188c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1198c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1208c116b0eSWenchao Xia " the temporary one\n" 1218c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1228c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1238c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1248c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1258c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 126b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 12739a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 12839a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 129b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1306883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 13177c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 132b033cd86SPaolo Bonzini "\n" 133f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 134c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1357a5ca864Sbellard } 1367a5ca864Sbellard 1377a5ca864Sbellard static void version(const char *name) 1387a5ca864Sbellard { 1397a5ca864Sbellard printf( 1407e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1417a5ca864Sbellard "Written by Anthony Liguori.\n" 1427a5ca864Sbellard "\n" 143be377133SEric Blake QEMU_COPYRIGHT "\n" 1447a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1457a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 146315bc7aaSths , name); 1477a5ca864Sbellard } 1487a5ca864Sbellard 1497a5ca864Sbellard struct partition_record 1507a5ca864Sbellard { 1517a5ca864Sbellard uint8_t bootable; 1527a5ca864Sbellard uint8_t start_head; 1537a5ca864Sbellard uint32_t start_cylinder; 1547a5ca864Sbellard uint8_t start_sector; 1557a5ca864Sbellard uint8_t system; 1567a5ca864Sbellard uint8_t end_head; 1577a5ca864Sbellard uint8_t end_cylinder; 1587a5ca864Sbellard uint8_t end_sector; 1597a5ca864Sbellard uint32_t start_sector_abs; 1607a5ca864Sbellard uint32_t nb_sectors_abs; 1617a5ca864Sbellard }; 1627a5ca864Sbellard 1637a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1647a5ca864Sbellard { 1657a5ca864Sbellard r->bootable = p[0]; 1667a5ca864Sbellard r->start_head = p[1]; 1677a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1687a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1697a5ca864Sbellard r->system = p[4]; 1707a5ca864Sbellard r->end_head = p[5]; 1717a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1727a5ca864Sbellard r->end_sector = p[6] & 0x3f; 173ac97393dSMax Reitz 174773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 175773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1767a5ca864Sbellard } 1777a5ca864Sbellard 1784c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1797a5ca864Sbellard off_t *offset, off_t *size) 1807a5ca864Sbellard { 1817a5ca864Sbellard struct partition_record mbr[4]; 182bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1837a5ca864Sbellard int i; 1847a5ca864Sbellard int ext_partnum = 4; 185cb7cf0e3SRyota Ozaki int ret; 1867a5ca864Sbellard 187bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 188bd31c214SEric Blake if (ret < 0) { 189a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 19085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 191cb7cf0e3SRyota Ozaki } 1927a5ca864Sbellard 1937a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 194185b4338SPaolo Bonzini return -EINVAL; 1957a5ca864Sbellard } 1967a5ca864Sbellard 1977a5ca864Sbellard for (i = 0; i < 4; i++) { 1987a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1997a5ca864Sbellard 200453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 2017a5ca864Sbellard continue; 202453b07b1SMax Reitz } 2037a5ca864Sbellard 2047a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 2057a5ca864Sbellard struct partition_record ext[4]; 206bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2077a5ca864Sbellard int j; 2087a5ca864Sbellard 209bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 210bd31c214SEric Blake data1, sizeof(data1)); 211bd31c214SEric Blake if (ret < 0) { 212a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 21385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 214cb7cf0e3SRyota Ozaki } 2157a5ca864Sbellard 2167a5ca864Sbellard for (j = 0; j < 4; j++) { 2177a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 218453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2197a5ca864Sbellard continue; 220453b07b1SMax Reitz } 2217a5ca864Sbellard 2227a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2237a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2247a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2257a5ca864Sbellard return 0; 2267a5ca864Sbellard } 2277a5ca864Sbellard } 2287a5ca864Sbellard ext_partnum += 4; 2297a5ca864Sbellard } else if ((i + 1) == partition) { 2307a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2317a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2327a5ca864Sbellard return 0; 2337a5ca864Sbellard } 2347a5ca864Sbellard } 2357a5ca864Sbellard 236185b4338SPaolo Bonzini return -ENOENT; 2377a5ca864Sbellard } 2387a5ca864Sbellard 239bb345110SPaolo Bonzini static void termsig_handler(int signum) 240bb345110SPaolo Bonzini { 24123994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 242a61c6782SPaolo Bonzini qemu_notify_event(); 243bb345110SPaolo Bonzini } 244bb345110SPaolo Bonzini 245537b41f5SPaolo Bonzini 2463c1fa35dSEric Blake #if HAVE_NBD_DEVICE 247a517e88bSPaolo Bonzini static void *show_parts(void *arg) 248cd831bd7Sths { 249a6ac2313SPaolo Bonzini char *device = arg; 250cd831bd7Sths int nbd; 251cd831bd7Sths 252cd831bd7Sths /* linux just needs an open() to trigger 253cd831bd7Sths * the partition table update 254cd831bd7Sths * but remember to load the module with max_part != 0 : 255cd831bd7Sths * modprobe nbd max_part=63 256cd831bd7Sths */ 257cd831bd7Sths nbd = open(device, O_RDWR); 258fc19f8a0SPaolo Bonzini if (nbd >= 0) { 259cd831bd7Sths close(nbd); 260cd831bd7Sths } 261a517e88bSPaolo Bonzini return NULL; 262a517e88bSPaolo Bonzini } 263a517e88bSPaolo Bonzini 264a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 265a517e88bSPaolo Bonzini { 266a6ac2313SPaolo Bonzini char *device = arg; 267081dd1feSEric Blake NBDExportInfo info = { .request_sizes = false, }; 268d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 269d0d6ff58SDaniel P. Berrange int fd; 270a517e88bSPaolo Bonzini int ret; 271a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2721ce52846SMax Reitz Error *local_error = NULL; 273a517e88bSPaolo Bonzini 274d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 275d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 276d0d6ff58SDaniel P. Berrange saddr, 277d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27848bec07eSDaniel P. Berrange error_report_err(local_error); 279a517e88bSPaolo Bonzini goto out; 280a517e88bSPaolo Bonzini } 281a517e88bSPaolo Bonzini 282004a89fcSEric Blake ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, 283004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 284fc19f8a0SPaolo Bonzini if (ret < 0) { 2851ce52846SMax Reitz if (local_error) { 28678288671SMarkus Armbruster error_report_err(local_error); 2871ce52846SMax Reitz } 2880c544d73SPaolo Bonzini goto out_socket; 289a517e88bSPaolo Bonzini } 290a517e88bSPaolo Bonzini 291a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 292fc19f8a0SPaolo Bonzini if (fd < 0) { 293a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 294b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2950c544d73SPaolo Bonzini goto out_socket; 296a6ac2313SPaolo Bonzini } 297a6ac2313SPaolo Bonzini 298004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 299fc19f8a0SPaolo Bonzini if (ret < 0) { 300be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 3010c544d73SPaolo Bonzini goto out_fd; 302a517e88bSPaolo Bonzini } 303a517e88bSPaolo Bonzini 304a517e88bSPaolo Bonzini /* update partition table */ 305a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 306a517e88bSPaolo Bonzini 307c1f8fdc3SPaolo Bonzini if (verbose) { 308a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 309a517e88bSPaolo Bonzini device, srcpath); 310c1f8fdc3SPaolo Bonzini } else { 311c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 312c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 313c1f8fdc3SPaolo Bonzini } 314a517e88bSPaolo Bonzini 315a517e88bSPaolo Bonzini ret = nbd_client(fd); 316a517e88bSPaolo Bonzini if (ret) { 3170c544d73SPaolo Bonzini goto out_fd; 318a517e88bSPaolo Bonzini } 319a517e88bSPaolo Bonzini close(fd); 320d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 321a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 322a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 323a517e88bSPaolo Bonzini 3240c544d73SPaolo Bonzini out_fd: 3250c544d73SPaolo Bonzini close(fd); 3260c544d73SPaolo Bonzini out_socket: 327d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 328a517e88bSPaolo Bonzini out: 329a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 330a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 331cd831bd7Sths } 3323c1fa35dSEric Blake #endif /* HAVE_NBD_DEVICE */ 333cd831bd7Sths 334e4afbf4fSFam Zheng static int nbd_can_accept(void) 335a61c6782SPaolo Bonzini { 336df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 337a61c6782SPaolo Bonzini } 338a61c6782SPaolo Bonzini 3399d976580SPhilippe Mathieu-Daudé static void nbd_export_closed(NBDExport *export) 3407860a380SPaolo Bonzini { 3417860a380SPaolo Bonzini assert(state == TERMINATING); 3427860a380SPaolo Bonzini state = TERMINATED; 3437860a380SPaolo Bonzini } 3447860a380SPaolo Bonzini 345d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 346e4afbf4fSFam Zheng 3470c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 348a61c6782SPaolo Bonzini { 349a61c6782SPaolo Bonzini nb_fds--; 3500c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3517860a380SPaolo Bonzini state = TERMINATE; 3527860a380SPaolo Bonzini } 353d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3547860a380SPaolo Bonzini nbd_client_put(client); 355a61c6782SPaolo Bonzini } 356a61c6782SPaolo Bonzini 357e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 358e4849c1dSDaniel P. Berrange gpointer opaque) 359a61c6782SPaolo Bonzini { 3607860a380SPaolo Bonzini if (state >= TERMINATE) { 361e4849c1dSDaniel P. Berrange return; 3627860a380SPaolo Bonzini } 3637860a380SPaolo Bonzini 364a61c6782SPaolo Bonzini nb_fds++; 365d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3667f7dfe2aSVladimir Sementsov-Ogievskiy nbd_client_new(cioc, tlscreds, NULL, nbd_client_closed); 367d0d6ff58SDaniel P. Berrange } 368d0d6ff58SDaniel P. Berrange 369d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 370e4afbf4fSFam Zheng { 371e4afbf4fSFam Zheng if (nbd_can_accept()) { 372e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 373e4afbf4fSFam Zheng } else { 374e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 375e4afbf4fSFam Zheng } 376e4afbf4fSFam Zheng } 377e4afbf4fSFam Zheng 37848bec07eSDaniel P. Berrange 379bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 38048bec07eSDaniel P. Berrange const char *bindto, 38148bec07eSDaniel P. Berrange const char *port) 38248bec07eSDaniel P. Berrange { 383bd269ebcSMarkus Armbruster SocketAddress *saddr; 38448bec07eSDaniel P. Berrange 385bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 38648bec07eSDaniel P. Berrange if (sockpath) { 387bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 388bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 38948bec07eSDaniel P. Berrange } else { 3900399293eSEric Blake InetSocketAddress *inet; 391bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 392bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3930399293eSEric Blake inet->host = g_strdup(bindto); 39448bec07eSDaniel P. Berrange if (port) { 3950399293eSEric Blake inet->port = g_strdup(port); 39648bec07eSDaniel P. Berrange } else { 3970399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39848bec07eSDaniel P. Berrange } 39948bec07eSDaniel P. Berrange } 40048bec07eSDaniel P. Berrange 40148bec07eSDaniel P. Berrange return saddr; 40248bec07eSDaniel P. Berrange } 40348bec07eSDaniel P. Berrange 40448bec07eSDaniel P. Berrange 40577c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40677c9aaefSDaniel P. Berrange .name = "file", 40777c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40877c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40977c9aaefSDaniel P. Berrange .desc = { 41077c9aaefSDaniel P. Berrange /* no elements => accept any params */ 41177c9aaefSDaniel P. Berrange { /* end of list */ } 41277c9aaefSDaniel P. Berrange }, 41377c9aaefSDaniel P. Berrange }; 41477c9aaefSDaniel P. Berrange 4150ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4160ab3b337SDaniel P. Berrange .name = "object", 4170ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4180ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4190ab3b337SDaniel P. Berrange .desc = { 4200ab3b337SDaniel P. Berrange { } 4210ab3b337SDaniel P. Berrange }, 4220ab3b337SDaniel P. Berrange }; 4230ab3b337SDaniel P. Berrange 4240ab3b337SDaniel P. Berrange 425145614a1SDaniel P. Berrange 426145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 427145614a1SDaniel P. Berrange { 428145614a1SDaniel P. Berrange Object *obj; 429145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 430145614a1SDaniel P. Berrange 431145614a1SDaniel P. Berrange obj = object_resolve_path_component( 432145614a1SDaniel P. Berrange object_get_objects_root(), id); 433145614a1SDaniel P. Berrange if (!obj) { 434145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 435145614a1SDaniel P. Berrange id); 436145614a1SDaniel P. Berrange return NULL; 437145614a1SDaniel P. Berrange } 438145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 439145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 440145614a1SDaniel P. Berrange if (!creds) { 441145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 442145614a1SDaniel P. Berrange id); 443145614a1SDaniel P. Berrange return NULL; 444145614a1SDaniel P. Berrange } 445145614a1SDaniel P. Berrange 446145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 447145614a1SDaniel P. Berrange error_setg(errp, 448145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 449145614a1SDaniel P. Berrange return NULL; 450145614a1SDaniel P. Berrange } 451145614a1SDaniel P. Berrange object_ref(obj); 452145614a1SDaniel P. Berrange return creds; 453145614a1SDaniel P. Berrange } 454145614a1SDaniel P. Berrange 455a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 456a721f53bSRichard W.M. Jones { 457a721f53bSRichard W.M. Jones if (*address == NULL) { 458a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 459a721f53bSRichard W.M. Jones } 460a721f53bSRichard W.M. Jones 461a721f53bSRichard W.M. Jones if (*port == NULL) { 462a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 463a721f53bSRichard W.M. Jones } 464a721f53bSRichard W.M. Jones } 465a721f53bSRichard W.M. Jones 466a721f53bSRichard W.M. Jones /* 467a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 468a721f53bSRichard W.M. Jones */ 469a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 470a721f53bSRichard W.M. Jones const char *sockpath, 471a721f53bSRichard W.M. Jones const char *address, 472a721f53bSRichard W.M. Jones const char *port) 473a721f53bSRichard W.M. Jones { 474a721f53bSRichard W.M. Jones if (device != NULL) { 475a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 476a721f53bSRichard W.M. Jones } 477a721f53bSRichard W.M. Jones 478a721f53bSRichard W.M. Jones if (sockpath != NULL) { 479a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 480a721f53bSRichard W.M. Jones } 481a721f53bSRichard W.M. Jones 482a721f53bSRichard W.M. Jones if (address != NULL) { 483a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 484a721f53bSRichard W.M. Jones } 485a721f53bSRichard W.M. Jones 486a721f53bSRichard W.M. Jones if (port != NULL) { 487a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 488a721f53bSRichard W.M. Jones } 489a721f53bSRichard W.M. Jones 490a721f53bSRichard W.M. Jones return NULL; 491a721f53bSRichard W.M. Jones } 492145614a1SDaniel P. Berrange 493b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 494b3b5299dSKevin Wolf { 495b3b5299dSKevin Wolf job_cancel_sync_all(); 496b3b5299dSKevin Wolf bdrv_close_all(); 497b3b5299dSKevin Wolf } 498b3b5299dSKevin Wolf 4997a5ca864Sbellard int main(int argc, char **argv) 5007a5ca864Sbellard { 50126f54e9aSMarkus Armbruster BlockBackend *blk; 5027a5ca864Sbellard BlockDriverState *bs; 5037a5ca864Sbellard off_t dev_offset = 0; 5047423f417SEric Blake uint16_t nbdflags = 0; 505cd831bd7Sths bool disconnect = false; 506a721f53bSRichard W.M. Jones const char *bindto = NULL; 50748bec07eSDaniel P. Berrange const char *port = NULL; 50848bec07eSDaniel P. Berrange char *sockpath = NULL; 509a6ac2313SPaolo Bonzini char *device = NULL; 5107a5ca864Sbellard off_t fd_size; 5118c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5128c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 513*636192c4SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:B:"; 5147a5ca864Sbellard struct option lopt[] = { 515aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 516aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 517aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 518aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 519aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 520aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 521aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 522aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 523*636192c4SEric Blake { "bitmap", required_argument, NULL, 'B' }, 524aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 525aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 526aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 527aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 528aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 529aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 530aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 531aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 532aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 533aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 534aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 535aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 536aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 537aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 538aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 539aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 540b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 541aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 542aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 54339ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 544ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 545660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5467a5ca864Sbellard }; 5477a5ca864Sbellard int ch; 5487a5ca864Sbellard int opt_ind = 0; 5497a5ca864Sbellard char *end; 550f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5517a5ca864Sbellard int partition = -1; 5524fbec260SMax Reitz int ret = 0; 55339a5235cSPaolo Bonzini bool seen_cache = false; 554ded9d2d5SPaolo Bonzini bool seen_discard = false; 55539a5235cSPaolo Bonzini bool seen_aio = false; 556a517e88bSPaolo Bonzini pthread_t client_thread; 557e6b63677SDaniel P. Berrange const char *fmt = NULL; 55834b5d2c6SMax Reitz Error *local_err = NULL; 559b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5604fbec260SMax Reitz QDict *options = NULL; 561f5cd0bb5SVladimir Sementsov-Ogievskiy const char *export_name = ""; /* Default export name */ 562b1a75b33SEric Blake const char *export_description = NULL; 563*636192c4SEric Blake const char *bitmap = NULL; 564145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 56577c9aaefSDaniel P. Berrange bool imageOpts = false; 5666effd5bfSKevin Wolf bool writethrough = true; 56739ca463eSDenis V. Lunev char *trace_file = NULL; 568ffb31e1dSMax Reitz bool fork_process = false; 569ffb31e1dSMax Reitz int old_stderr = -1; 570a721f53bSRichard W.M. Jones unsigned socket_activation; 5717a5ca864Sbellard 572a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 573a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 574a517e88bSPaolo Bonzini */ 575bb345110SPaolo Bonzini struct sigaction sa_sigterm; 576bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 577bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 578bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 579c2297088SDaniel P. Berrange 580041e32b8SMax Reitz #ifdef CONFIG_POSIX 581041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 582041e32b8SMax Reitz #endif 583041e32b8SMax Reitz 584fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 5853ba1b7baSEric Blake error_set_progname(argv[0]); 586e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 587c2297088SDaniel P. Berrange 5880ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5890ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 59039ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 59110f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 592bb345110SPaolo Bonzini 5937a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5947a5ca864Sbellard switch (ch) { 5957a5ca864Sbellard case 's': 5962f726488Sths flags |= BDRV_O_SNAPSHOT; 5972f726488Sths break; 5982f726488Sths case 'n': 59939a5235cSPaolo Bonzini optarg = (char *) "none"; 60039a5235cSPaolo Bonzini /* fallthrough */ 60139a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 60239a5235cSPaolo Bonzini if (seen_cache) { 60385b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 60485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60539a5235cSPaolo Bonzini } 60639a5235cSPaolo Bonzini seen_cache = true; 6076effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 60885b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 60985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61039a5235cSPaolo Bonzini } 6117a5ca864Sbellard break; 61239a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 61339a5235cSPaolo Bonzini if (seen_aio) { 61485b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 61585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61639a5235cSPaolo Bonzini } 61739a5235cSPaolo Bonzini seen_aio = true; 61839a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 61939a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 62039a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 62139a5235cSPaolo Bonzini /* this is the default */ 62239a5235cSPaolo Bonzini } else { 62385b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 62485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62539a5235cSPaolo Bonzini } 62639a5235cSPaolo Bonzini break; 627ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 628ded9d2d5SPaolo Bonzini if (seen_discard) { 62985b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 63085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 631ded9d2d5SPaolo Bonzini } 632ded9d2d5SPaolo Bonzini seen_discard = true; 633ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 63485b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 63585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 636ded9d2d5SPaolo Bonzini } 637ded9d2d5SPaolo Bonzini break; 638b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 639b3838a40SPeter Lieven detect_zeroes = 640f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 641b3838a40SPeter Lieven optarg, 642b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 643b3838a40SPeter Lieven &local_err); 644b3838a40SPeter Lieven if (local_err) { 645c29b77f9SMarkus Armbruster error_reportf_err(local_err, 646c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 64785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 648b3838a40SPeter Lieven } 649b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 650b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 65185b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 652b3838a40SPeter Lieven "without setting discard operation to unmap"); 65385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 654b3838a40SPeter Lieven } 655b3838a40SPeter Lieven break; 6567a5ca864Sbellard case 'b': 6577a5ca864Sbellard bindto = optarg; 6587a5ca864Sbellard break; 6597a5ca864Sbellard case 'p': 66048bec07eSDaniel P. Berrange port = optarg; 6617a5ca864Sbellard break; 6627a5ca864Sbellard case 'o': 6637a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6647a5ca864Sbellard if (*end) { 66585b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 66685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6677a5ca864Sbellard } 6687a5ca864Sbellard if (dev_offset < 0) { 66985b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 67085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6717a5ca864Sbellard } 6727a5ca864Sbellard break; 6738c116b0eSWenchao Xia case 'l': 6748c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 67570b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 67670b94331SMarkus Armbruster optarg, false); 6778c116b0eSWenchao Xia if (!sn_opts) { 67885b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6798c116b0eSWenchao Xia optarg); 68085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6818c116b0eSWenchao Xia } 6828c116b0eSWenchao Xia } else { 6838c116b0eSWenchao Xia sn_id_or_name = optarg; 6848c116b0eSWenchao Xia } 6858c116b0eSWenchao Xia /* fall through */ 6867a5ca864Sbellard case 'r': 687b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 68807108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6897a5ca864Sbellard break; 6907a5ca864Sbellard case 'P': 6917a5ca864Sbellard partition = strtol(optarg, &end, 0); 692713cc671SPeter Lieven if (*end) { 69385b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 69485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 695713cc671SPeter Lieven } 696713cc671SPeter Lieven if (partition < 1 || partition > 8) { 69785b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 69885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 699713cc671SPeter Lieven } 7007a5ca864Sbellard break; 701*636192c4SEric Blake case 'B': 702*636192c4SEric Blake bitmap = optarg; 703*636192c4SEric Blake break; 704cd831bd7Sths case 'k': 705b32f6c28SPaolo Bonzini sockpath = optarg; 706713cc671SPeter Lieven if (sockpath[0] != '/') { 7079af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 70885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 709713cc671SPeter Lieven } 710cd831bd7Sths break; 711cd831bd7Sths case 'd': 712cd831bd7Sths disconnect = true; 713cd831bd7Sths break; 714cd831bd7Sths case 'c': 715cd831bd7Sths device = optarg; 716cd831bd7Sths break; 7173b05a8e9Sths case 'e': 7183b05a8e9Sths shared = strtol(optarg, &end, 0); 7193b05a8e9Sths if (*end) { 72085b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 72185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7223b05a8e9Sths } 7233b05a8e9Sths if (shared < 1) { 7249af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 72585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7263b05a8e9Sths } 7273b05a8e9Sths break; 728e6b63677SDaniel P. Berrange case 'f': 729e6b63677SDaniel P. Berrange fmt = optarg; 730e6b63677SDaniel P. Berrange break; 73175818250Sths case 't': 73275818250Sths persistent = 1; 73375818250Sths break; 7343d4b2f9cSDaniel P. Berrange case 'x': 7353d4b2f9cSDaniel P. Berrange export_name = optarg; 7363d4b2f9cSDaniel P. Berrange break; 737b1a75b33SEric Blake case 'D': 738b1a75b33SEric Blake export_description = optarg; 739b1a75b33SEric Blake break; 7407a5ca864Sbellard case 'v': 7417a5ca864Sbellard verbose = 1; 7427a5ca864Sbellard break; 7437a5ca864Sbellard case 'V': 7447a5ca864Sbellard version(argv[0]); 7457a5ca864Sbellard exit(0); 7467a5ca864Sbellard break; 7477a5ca864Sbellard case 'h': 7487a5ca864Sbellard usage(argv[0]); 7497a5ca864Sbellard exit(0); 7507a5ca864Sbellard break; 7517a5ca864Sbellard case '?': 75285b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 75385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7540ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7550ab3b337SDaniel P. Berrange QemuOpts *opts; 7560ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7570ab3b337SDaniel P. Berrange optarg, true); 7580ab3b337SDaniel P. Berrange if (!opts) { 7590ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7600ab3b337SDaniel P. Berrange } 7610ab3b337SDaniel P. Berrange } break; 762145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 763145614a1SDaniel P. Berrange tlscredsid = optarg; 764145614a1SDaniel P. Berrange break; 76577c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76677c9aaefSDaniel P. Berrange imageOpts = true; 76777c9aaefSDaniel P. Berrange break; 76839ca463eSDenis V. Lunev case 'T': 76939ca463eSDenis V. Lunev g_free(trace_file); 77039ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 77139ca463eSDenis V. Lunev break; 772ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 773ffb31e1dSMax Reitz fork_process = true; 774ffb31e1dSMax Reitz break; 7757a5ca864Sbellard } 7767a5ca864Sbellard } 7777a5ca864Sbellard 7787a5ca864Sbellard if ((argc - optind) != 1) { 779433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 780433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 78185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7827a5ca864Sbellard } 7837a5ca864Sbellard 7847e1e0c11SMarkus Armbruster qemu_opts_foreach(&qemu_object_opts, 7850ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 7867e1e0c11SMarkus Armbruster NULL, &error_fatal); 7870ab3b337SDaniel P. Berrange 78839ca463eSDenis V. Lunev if (!trace_init_backends()) { 78939ca463eSDenis V. Lunev exit(1); 79039ca463eSDenis V. Lunev } 79139ca463eSDenis V. Lunev trace_init_file(trace_file); 79239ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 79339ca463eSDenis V. Lunev 794a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 795a721f53bSRichard W.M. Jones if (socket_activation == 0) { 796a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 797a721f53bSRichard W.M. Jones } else { 798a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 799a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 800a721f53bSRichard W.M. Jones bindto, port); 801a721f53bSRichard W.M. Jones if (err_msg != NULL) { 802a721f53bSRichard W.M. Jones error_report("%s", err_msg); 803a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 804a721f53bSRichard W.M. Jones } 80553fabd4bSPaolo Bonzini 80653fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 80753fabd4bSPaolo Bonzini if (socket_activation > 1) { 80853fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 80953fabd4bSPaolo Bonzini "LISTEN_FDS"); 81053fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 81153fabd4bSPaolo Bonzini } 812a721f53bSRichard W.M. Jones } 813a721f53bSRichard W.M. Jones 814145614a1SDaniel P. Berrange if (tlscredsid) { 815145614a1SDaniel P. Berrange if (sockpath) { 816145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 817145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 818145614a1SDaniel P. Berrange } 819145614a1SDaniel P. Berrange if (device) { 820145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 821145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 822145614a1SDaniel P. Berrange } 823145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 824145614a1SDaniel P. Berrange if (local_err) { 825145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 826145614a1SDaniel P. Berrange error_get_pretty(local_err)); 827145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 828145614a1SDaniel P. Berrange } 829145614a1SDaniel P. Berrange } 830145614a1SDaniel P. Berrange 8313c1fa35dSEric Blake #if !HAVE_NBD_DEVICE 8323c1fa35dSEric Blake if (disconnect || device) { 8333c1fa35dSEric Blake error_report("Kernel /dev/nbdN support not available"); 8343c1fa35dSEric Blake exit(EXIT_FAILURE); 8353c1fa35dSEric Blake } 8363c1fa35dSEric Blake #else /* HAVE_NBD_DEVICE */ 837cd831bd7Sths if (disconnect) { 838d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 839d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 84085b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 84185b01e09SMarkus Armbruster strerror(errno)); 84285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 843fc19f8a0SPaolo Bonzini } 844d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 845cd831bd7Sths 846d0d6ff58SDaniel P. Berrange close(nbdfd); 847cd831bd7Sths 848cd831bd7Sths printf("%s disconnected\n", argv[optind]); 849cd831bd7Sths 850cd831bd7Sths return 0; 851cd831bd7Sths } 8523c1fa35dSEric Blake #endif 853cd831bd7Sths 854ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 855c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 856c1f8fdc3SPaolo Bonzini pid_t pid; 857c1f8fdc3SPaolo Bonzini int ret; 858c1f8fdc3SPaolo Bonzini 859fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 86085b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 86185b01e09SMarkus Armbruster strerror(errno)); 86285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 863c1f8fdc3SPaolo Bonzini } 864c1f8fdc3SPaolo Bonzini 865c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 866c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 867c1f8fdc3SPaolo Bonzini */ 868c1f8fdc3SPaolo Bonzini pid = fork(); 86970d4739eSMax Reitz if (pid < 0) { 87085b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 87185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 87270d4739eSMax Reitz } else if (pid == 0) { 873c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 8749faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 875c1f8fdc3SPaolo Bonzini 876c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 877ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 878c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 879fc19f8a0SPaolo Bonzini if (ret < 0) { 88085b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 88185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 882c1f8fdc3SPaolo Bonzini } 883c1f8fdc3SPaolo Bonzini 884c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 885c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 886c1f8fdc3SPaolo Bonzini } else { 887c1f8fdc3SPaolo Bonzini bool errors = false; 888c1f8fdc3SPaolo Bonzini char *buf; 889c1f8fdc3SPaolo Bonzini 890c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 891c1f8fdc3SPaolo Bonzini * it closes the pipe. 892c1f8fdc3SPaolo Bonzini */ 893c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 894c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 895c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 896c1f8fdc3SPaolo Bonzini errors = true; 897c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 898fc19f8a0SPaolo Bonzini if (ret < 0) { 899c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 900c1f8fdc3SPaolo Bonzini } 901c1f8fdc3SPaolo Bonzini } 902fc19f8a0SPaolo Bonzini if (ret < 0) { 90385b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 90485b01e09SMarkus Armbruster strerror(errno)); 90585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 906c1f8fdc3SPaolo Bonzini } 907c1f8fdc3SPaolo Bonzini 908c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 909c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 910c1f8fdc3SPaolo Bonzini */ 911c1f8fdc3SPaolo Bonzini exit(errors); 912c1f8fdc3SPaolo Bonzini } 913c1f8fdc3SPaolo Bonzini } 914c1f8fdc3SPaolo Bonzini 915a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 916b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 917b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 918cd831bd7Sths } 919cd831bd7Sths 920e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 921a721f53bSRichard W.M. Jones if (socket_activation == 0) { 92248bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 923e4849c1dSDaniel P. Berrange if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { 924e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 925a721f53bSRichard W.M. Jones error_report_err(local_err); 926e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 927a721f53bSRichard W.M. Jones } 928a721f53bSRichard W.M. Jones } else { 929e4849c1dSDaniel P. Berrange size_t i; 930a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 931e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 932e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 933e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 934a721f53bSRichard W.M. Jones &local_err); 935e4849c1dSDaniel P. Berrange if (sioc == NULL) { 936e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 937a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 938a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 939a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 940a721f53bSRichard W.M. Jones } 941e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 942e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 943e4849c1dSDaniel P. Berrange } 944a721f53bSRichard W.M. Jones } 94548bec07eSDaniel P. Berrange 9462f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 947565f65d2SMarkus Armbruster error_report_err(local_err); 9482f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9492f78e491SChrysostomos Nanakos } 950802ddc37SPaolo Bonzini bdrv_init(); 951b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 952802ddc37SPaolo Bonzini 95377c9aaefSDaniel P. Berrange srcpath = argv[optind]; 95477c9aaefSDaniel P. Berrange if (imageOpts) { 95577c9aaefSDaniel P. Berrange QemuOpts *opts; 95677c9aaefSDaniel P. Berrange if (fmt) { 95777c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 95877c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 95977c9aaefSDaniel P. Berrange } 96077c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 96177c9aaefSDaniel P. Berrange if (!opts) { 96277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 96377c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 96477c9aaefSDaniel P. Berrange } 96577c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 96677c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 967efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 96877c9aaefSDaniel P. Berrange } else { 969e6b63677SDaniel P. Berrange if (fmt) { 9704fbec260SMax Reitz options = qdict_new(); 97146f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 972e6b63677SDaniel P. Berrange } 973efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 97477c9aaefSDaniel P. Berrange } 97577c9aaefSDaniel P. Berrange 9764fbec260SMax Reitz if (!blk) { 977c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 978c29b77f9SMarkus Armbruster argv[optind]); 97985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 980802ddc37SPaolo Bonzini } 9814fbec260SMax Reitz bs = blk_bs(blk); 982802ddc37SPaolo Bonzini 9836effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 9846effd5bfSKevin Wolf 9858c116b0eSWenchao Xia if (sn_opts) { 9868c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 9878c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 9888c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 9898c116b0eSWenchao Xia &local_err); 9908c116b0eSWenchao Xia } else if (sn_id_or_name) { 9918c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 9928c116b0eSWenchao Xia &local_err); 9938c116b0eSWenchao Xia } 9948c116b0eSWenchao Xia if (ret < 0) { 995c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 99685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9978c116b0eSWenchao Xia } 9988c116b0eSWenchao Xia 999b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 10004c58e80aSMax Reitz fd_size = blk_getlength(blk); 100198f44bbeSMax Reitz if (fd_size < 0) { 100285b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 100398f44bbeSMax Reitz strerror(-fd_size)); 100485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 100598f44bbeSMax Reitz } 1006802ddc37SPaolo Bonzini 1007e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 1008e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 1009e424b655STomáš Golembiovský "(%lld)", 1010e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 1011e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1012e424b655STomáš Golembiovský } 1013e424b655STomáš Golembiovský fd_size -= dev_offset; 1014e424b655STomáš Golembiovský 1015185b4338SPaolo Bonzini if (partition != -1) { 10164c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 1017185b4338SPaolo Bonzini if (ret < 0) { 101885b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1019a4699e55SMarkus Armbruster strerror(-ret)); 102085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1021802ddc37SPaolo Bonzini } 1022185b4338SPaolo Bonzini } 1023802ddc37SPaolo Bonzini 10243fa4c765SEric Blake export = nbd_export_new(bs, dev_offset, fd_size, export_name, 1025*636192c4SEric Blake export_description, bitmap, nbdflags, 1026678ba275SEric Blake nbd_export_closed, writethrough, NULL, 1027678ba275SEric Blake &error_fatal); 10283b05a8e9Sths 1029f1ef5555SPaolo Bonzini if (device) { 10303c1fa35dSEric Blake #if HAVE_NBD_DEVICE 1031f1ef5555SPaolo Bonzini int ret; 1032f1ef5555SPaolo Bonzini 1033a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1034f1ef5555SPaolo Bonzini if (ret != 0) { 103585b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 103685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1037f1ef5555SPaolo Bonzini } 10383c1fa35dSEric Blake #endif 1039f1ef5555SPaolo Bonzini } else { 1040f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1041f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1042f1ef5555SPaolo Bonzini } 1043f1ef5555SPaolo Bonzini 1044d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10457a5ca864Sbellard 10469faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 10479faf31b6SMichael Tokarev * to free any busy filesystems */ 10489faf31b6SMichael Tokarev if (chdir("/") < 0) { 104985b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 105085b01e09SMarkus Armbruster strerror(errno)); 105185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10529faf31b6SMichael Tokarev } 10539faf31b6SMichael Tokarev 1054ffb31e1dSMax Reitz if (fork_process) { 1055ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1056ffb31e1dSMax Reitz close(old_stderr); 1057ffb31e1dSMax Reitz } 1058ffb31e1dSMax Reitz 10597860a380SPaolo Bonzini state = RUNNING; 10603b05a8e9Sths do { 1061a61c6782SPaolo Bonzini main_loop_wait(false); 10627860a380SPaolo Bonzini if (state == TERMINATE) { 10637860a380SPaolo Bonzini state = TERMINATING; 10649d976580SPhilippe Mathieu-Daudé nbd_export_close(export); 10659d976580SPhilippe Mathieu-Daudé nbd_export_put(export); 10669d976580SPhilippe Mathieu-Daudé export = NULL; 10677860a380SPaolo Bonzini } 10687860a380SPaolo Bonzini } while (state != TERMINATED); 10692c8d9f06SPaolo Bonzini 107026f54e9aSMarkus Armbruster blk_unref(blk); 1071b32f6c28SPaolo Bonzini if (sockpath) { 1072b32f6c28SPaolo Bonzini unlink(sockpath); 1073b32f6c28SPaolo Bonzini } 10747a5ca864Sbellard 10758c116b0eSWenchao Xia qemu_opts_del(sn_opts); 10768c116b0eSWenchao Xia 1077a517e88bSPaolo Bonzini if (device) { 1078a517e88bSPaolo Bonzini void *ret; 1079a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1080a517e88bSPaolo Bonzini exit(ret != NULL); 1081a517e88bSPaolo Bonzini } else { 1082a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1083a517e88bSPaolo Bonzini } 10847a5ca864Sbellard } 1085