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 46cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 48fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 49fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 50fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 51fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 52fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 53fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 54ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 557a5ca864Sbellard 56bd31c214SEric Blake #define MBR_SIZE 512 57bd31c214SEric Blake 58af49bbbeSPaolo Bonzini static NBDExport *exp; 593d4b2f9cSDaniel P. Berrange static bool newproto; 60b1d8e52eSblueswir1 static int verbose; 61a517e88bSPaolo Bonzini static char *srcpath; 62bd269ebcSMarkus Armbruster static SocketAddress *saddr; 637860a380SPaolo Bonzini static int persistent = 0; 647860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 65a61c6782SPaolo Bonzini static int shared = 1; 66a61c6782SPaolo Bonzini static int nb_fds; 67e4849c1dSDaniel P. Berrange static QIONetListener *server; 68145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 697a5ca864Sbellard 707a5ca864Sbellard static void usage(const char *name) 717a5ca864Sbellard { 72b033cd86SPaolo Bonzini (printf) ( 737a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 747a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 757a5ca864Sbellard "\n" 767a5ca864Sbellard " -h, --help display this help and exit\n" 777a5ca864Sbellard " -V, --version output version information and exit\n" 787a5ca864Sbellard "\n" 79b033cd86SPaolo Bonzini "Connection properties:\n" 80b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 81b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 82b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 83b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 84b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 85b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 86b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 87332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 88b1a75b33SEric Blake " -D, --description=TEXT with -x, also export a human-readable description\n" 89b033cd86SPaolo Bonzini "\n" 90b033cd86SPaolo Bonzini "Exposing part of the image:\n" 91b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 92b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 93b033cd86SPaolo Bonzini "\n" 940ab3b337SDaniel P. Berrange "General purpose options:\n" 950ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 960ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 9739ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 9839ca463eSDenis V. Lunev " specify tracing options\n" 99ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 100ffb31e1dSMax Reitz " once the server is running\n" 101b033cd86SPaolo Bonzini #ifdef __linux__ 102b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 103b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 104b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 105b033cd86SPaolo Bonzini "\n" 106b033cd86SPaolo Bonzini #endif 107b033cd86SPaolo Bonzini "\n" 108b033cd86SPaolo Bonzini "Block device options:\n" 1094323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 110b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1118c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1128c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1138c116b0eSWenchao Xia " the temporary one\n" 1148c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1158c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1168c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1178c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1188c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 119b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 12039a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 12139a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 122b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1236883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 12477c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 125b033cd86SPaolo Bonzini "\n" 126f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 127c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1287a5ca864Sbellard } 1297a5ca864Sbellard 1307a5ca864Sbellard static void version(const char *name) 1317a5ca864Sbellard { 1327a5ca864Sbellard printf( 133*7e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1347a5ca864Sbellard "Written by Anthony Liguori.\n" 1357a5ca864Sbellard "\n" 136be377133SEric Blake QEMU_COPYRIGHT "\n" 1377a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1387a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 139315bc7aaSths , name); 1407a5ca864Sbellard } 1417a5ca864Sbellard 1427a5ca864Sbellard struct partition_record 1437a5ca864Sbellard { 1447a5ca864Sbellard uint8_t bootable; 1457a5ca864Sbellard uint8_t start_head; 1467a5ca864Sbellard uint32_t start_cylinder; 1477a5ca864Sbellard uint8_t start_sector; 1487a5ca864Sbellard uint8_t system; 1497a5ca864Sbellard uint8_t end_head; 1507a5ca864Sbellard uint8_t end_cylinder; 1517a5ca864Sbellard uint8_t end_sector; 1527a5ca864Sbellard uint32_t start_sector_abs; 1537a5ca864Sbellard uint32_t nb_sectors_abs; 1547a5ca864Sbellard }; 1557a5ca864Sbellard 1567a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1577a5ca864Sbellard { 1587a5ca864Sbellard r->bootable = p[0]; 1597a5ca864Sbellard r->start_head = p[1]; 1607a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1617a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1627a5ca864Sbellard r->system = p[4]; 1637a5ca864Sbellard r->end_head = p[5]; 1647a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1657a5ca864Sbellard r->end_sector = p[6] & 0x3f; 166ac97393dSMax Reitz 167773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 168773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1697a5ca864Sbellard } 1707a5ca864Sbellard 1714c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1727a5ca864Sbellard off_t *offset, off_t *size) 1737a5ca864Sbellard { 1747a5ca864Sbellard struct partition_record mbr[4]; 175bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1767a5ca864Sbellard int i; 1777a5ca864Sbellard int ext_partnum = 4; 178cb7cf0e3SRyota Ozaki int ret; 1797a5ca864Sbellard 180bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 181bd31c214SEric Blake if (ret < 0) { 182a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 184cb7cf0e3SRyota Ozaki } 1857a5ca864Sbellard 1867a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 187185b4338SPaolo Bonzini return -EINVAL; 1887a5ca864Sbellard } 1897a5ca864Sbellard 1907a5ca864Sbellard for (i = 0; i < 4; i++) { 1917a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1927a5ca864Sbellard 193453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1947a5ca864Sbellard continue; 195453b07b1SMax Reitz } 1967a5ca864Sbellard 1977a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1987a5ca864Sbellard struct partition_record ext[4]; 199bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2007a5ca864Sbellard int j; 2017a5ca864Sbellard 202bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 203bd31c214SEric Blake data1, sizeof(data1)); 204bd31c214SEric Blake if (ret < 0) { 205a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 207cb7cf0e3SRyota Ozaki } 2087a5ca864Sbellard 2097a5ca864Sbellard for (j = 0; j < 4; j++) { 2107a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 211453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2127a5ca864Sbellard continue; 213453b07b1SMax Reitz } 2147a5ca864Sbellard 2157a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2167a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2177a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2187a5ca864Sbellard return 0; 2197a5ca864Sbellard } 2207a5ca864Sbellard } 2217a5ca864Sbellard ext_partnum += 4; 2227a5ca864Sbellard } else if ((i + 1) == partition) { 2237a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2247a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2257a5ca864Sbellard return 0; 2267a5ca864Sbellard } 2277a5ca864Sbellard } 2287a5ca864Sbellard 229185b4338SPaolo Bonzini return -ENOENT; 2307a5ca864Sbellard } 2317a5ca864Sbellard 232bb345110SPaolo Bonzini static void termsig_handler(int signum) 233bb345110SPaolo Bonzini { 23423994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 235a61c6782SPaolo Bonzini qemu_notify_event(); 236bb345110SPaolo Bonzini } 237bb345110SPaolo Bonzini 238537b41f5SPaolo Bonzini 239a517e88bSPaolo Bonzini static void *show_parts(void *arg) 240cd831bd7Sths { 241a6ac2313SPaolo Bonzini char *device = arg; 242cd831bd7Sths int nbd; 243cd831bd7Sths 244cd831bd7Sths /* linux just needs an open() to trigger 245cd831bd7Sths * the partition table update 246cd831bd7Sths * but remember to load the module with max_part != 0 : 247cd831bd7Sths * modprobe nbd max_part=63 248cd831bd7Sths */ 249cd831bd7Sths nbd = open(device, O_RDWR); 250fc19f8a0SPaolo Bonzini if (nbd >= 0) { 251cd831bd7Sths close(nbd); 252cd831bd7Sths } 253a517e88bSPaolo Bonzini return NULL; 254a517e88bSPaolo Bonzini } 255a517e88bSPaolo Bonzini 256a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 257a517e88bSPaolo Bonzini { 258a6ac2313SPaolo Bonzini char *device = arg; 259081dd1feSEric Blake NBDExportInfo info = { .request_sizes = false, }; 260d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 261d0d6ff58SDaniel P. Berrange int fd; 262a517e88bSPaolo Bonzini int ret; 263a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2641ce52846SMax Reitz Error *local_error = NULL; 265a517e88bSPaolo Bonzini 266d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 267d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 268d0d6ff58SDaniel P. Berrange saddr, 269d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27048bec07eSDaniel P. Berrange error_report_err(local_error); 271a517e88bSPaolo Bonzini goto out; 272a517e88bSPaolo Bonzini } 273a517e88bSPaolo Bonzini 274004a89fcSEric Blake ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, 275004a89fcSEric Blake NULL, NULL, NULL, &info, &local_error); 276fc19f8a0SPaolo Bonzini if (ret < 0) { 2771ce52846SMax Reitz if (local_error) { 27878288671SMarkus Armbruster error_report_err(local_error); 2791ce52846SMax Reitz } 2800c544d73SPaolo Bonzini goto out_socket; 281a517e88bSPaolo Bonzini } 282a517e88bSPaolo Bonzini 283a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 284fc19f8a0SPaolo Bonzini if (fd < 0) { 285a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 286b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2870c544d73SPaolo Bonzini goto out_socket; 288a6ac2313SPaolo Bonzini } 289a6ac2313SPaolo Bonzini 290004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 291fc19f8a0SPaolo Bonzini if (ret < 0) { 292be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 2930c544d73SPaolo Bonzini goto out_fd; 294a517e88bSPaolo Bonzini } 295a517e88bSPaolo Bonzini 296a517e88bSPaolo Bonzini /* update partition table */ 297a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 298a517e88bSPaolo Bonzini 299c1f8fdc3SPaolo Bonzini if (verbose) { 300a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 301a517e88bSPaolo Bonzini device, srcpath); 302c1f8fdc3SPaolo Bonzini } else { 303c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 304c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 305c1f8fdc3SPaolo Bonzini } 306a517e88bSPaolo Bonzini 307a517e88bSPaolo Bonzini ret = nbd_client(fd); 308a517e88bSPaolo Bonzini if (ret) { 3090c544d73SPaolo Bonzini goto out_fd; 310a517e88bSPaolo Bonzini } 311a517e88bSPaolo Bonzini close(fd); 312d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 313a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 314a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 315a517e88bSPaolo Bonzini 3160c544d73SPaolo Bonzini out_fd: 3170c544d73SPaolo Bonzini close(fd); 3180c544d73SPaolo Bonzini out_socket: 319d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 320a517e88bSPaolo Bonzini out: 321a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 322a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 323cd831bd7Sths } 324cd831bd7Sths 325e4afbf4fSFam Zheng static int nbd_can_accept(void) 326a61c6782SPaolo Bonzini { 327df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 328a61c6782SPaolo Bonzini } 329a61c6782SPaolo Bonzini 3307860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3317860a380SPaolo Bonzini { 3327860a380SPaolo Bonzini assert(state == TERMINATING); 3337860a380SPaolo Bonzini state = TERMINATED; 3347860a380SPaolo Bonzini } 3357860a380SPaolo Bonzini 336d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 337e4afbf4fSFam Zheng 3380c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 339a61c6782SPaolo Bonzini { 340a61c6782SPaolo Bonzini nb_fds--; 3410c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3427860a380SPaolo Bonzini state = TERMINATE; 3437860a380SPaolo Bonzini } 344d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3457860a380SPaolo Bonzini nbd_client_put(client); 346a61c6782SPaolo Bonzini } 347a61c6782SPaolo Bonzini 348e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 349e4849c1dSDaniel P. Berrange gpointer opaque) 350a61c6782SPaolo Bonzini { 3517860a380SPaolo Bonzini if (state >= TERMINATE) { 352e4849c1dSDaniel P. Berrange return; 3537860a380SPaolo Bonzini } 3547860a380SPaolo Bonzini 355a61c6782SPaolo Bonzini nb_fds++; 356d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 357f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 358145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 359d0d6ff58SDaniel P. Berrange } 360d0d6ff58SDaniel P. Berrange 361d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 362e4afbf4fSFam Zheng { 363e4afbf4fSFam Zheng if (nbd_can_accept()) { 364e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 365e4afbf4fSFam Zheng } else { 366e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 367e4afbf4fSFam Zheng } 368e4afbf4fSFam Zheng } 369e4afbf4fSFam Zheng 37048bec07eSDaniel P. Berrange 371bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 37248bec07eSDaniel P. Berrange const char *bindto, 37348bec07eSDaniel P. Berrange const char *port) 37448bec07eSDaniel P. Berrange { 375bd269ebcSMarkus Armbruster SocketAddress *saddr; 37648bec07eSDaniel P. Berrange 377bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 37848bec07eSDaniel P. Berrange if (sockpath) { 379bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 380bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 38148bec07eSDaniel P. Berrange } else { 3820399293eSEric Blake InetSocketAddress *inet; 383bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 384bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3850399293eSEric Blake inet->host = g_strdup(bindto); 38648bec07eSDaniel P. Berrange if (port) { 3870399293eSEric Blake inet->port = g_strdup(port); 38848bec07eSDaniel P. Berrange } else { 3890399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39048bec07eSDaniel P. Berrange } 39148bec07eSDaniel P. Berrange } 39248bec07eSDaniel P. Berrange 39348bec07eSDaniel P. Berrange return saddr; 39448bec07eSDaniel P. Berrange } 39548bec07eSDaniel P. Berrange 39648bec07eSDaniel P. Berrange 39777c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 39877c9aaefSDaniel P. Berrange .name = "file", 39977c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40077c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40177c9aaefSDaniel P. Berrange .desc = { 40277c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40377c9aaefSDaniel P. Berrange { /* end of list */ } 40477c9aaefSDaniel P. Berrange }, 40577c9aaefSDaniel P. Berrange }; 40677c9aaefSDaniel P. Berrange 4070ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4080ab3b337SDaniel P. Berrange .name = "object", 4090ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4100ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4110ab3b337SDaniel P. Berrange .desc = { 4120ab3b337SDaniel P. Berrange { } 4130ab3b337SDaniel P. Berrange }, 4140ab3b337SDaniel P. Berrange }; 4150ab3b337SDaniel P. Berrange 4160ab3b337SDaniel P. Berrange 417145614a1SDaniel P. Berrange 418145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 419145614a1SDaniel P. Berrange { 420145614a1SDaniel P. Berrange Object *obj; 421145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 422145614a1SDaniel P. Berrange 423145614a1SDaniel P. Berrange obj = object_resolve_path_component( 424145614a1SDaniel P. Berrange object_get_objects_root(), id); 425145614a1SDaniel P. Berrange if (!obj) { 426145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 427145614a1SDaniel P. Berrange id); 428145614a1SDaniel P. Berrange return NULL; 429145614a1SDaniel P. Berrange } 430145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 431145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 432145614a1SDaniel P. Berrange if (!creds) { 433145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 434145614a1SDaniel P. Berrange id); 435145614a1SDaniel P. Berrange return NULL; 436145614a1SDaniel P. Berrange } 437145614a1SDaniel P. Berrange 438145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 439145614a1SDaniel P. Berrange error_setg(errp, 440145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 441145614a1SDaniel P. Berrange return NULL; 442145614a1SDaniel P. Berrange } 443145614a1SDaniel P. Berrange object_ref(obj); 444145614a1SDaniel P. Berrange return creds; 445145614a1SDaniel P. Berrange } 446145614a1SDaniel P. Berrange 447a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 448a721f53bSRichard W.M. Jones { 449a721f53bSRichard W.M. Jones if (*address == NULL) { 450a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 451a721f53bSRichard W.M. Jones } 452a721f53bSRichard W.M. Jones 453a721f53bSRichard W.M. Jones if (*port == NULL) { 454a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 455a721f53bSRichard W.M. Jones } 456a721f53bSRichard W.M. Jones } 457a721f53bSRichard W.M. Jones 458a721f53bSRichard W.M. Jones /* 459a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 460a721f53bSRichard W.M. Jones */ 461a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 462a721f53bSRichard W.M. Jones const char *sockpath, 463a721f53bSRichard W.M. Jones const char *address, 464a721f53bSRichard W.M. Jones const char *port) 465a721f53bSRichard W.M. Jones { 466a721f53bSRichard W.M. Jones if (device != NULL) { 467a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 468a721f53bSRichard W.M. Jones } 469a721f53bSRichard W.M. Jones 470a721f53bSRichard W.M. Jones if (sockpath != NULL) { 471a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 472a721f53bSRichard W.M. Jones } 473a721f53bSRichard W.M. Jones 474a721f53bSRichard W.M. Jones if (address != NULL) { 475a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 476a721f53bSRichard W.M. Jones } 477a721f53bSRichard W.M. Jones 478a721f53bSRichard W.M. Jones if (port != NULL) { 479a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 480a721f53bSRichard W.M. Jones } 481a721f53bSRichard W.M. Jones 482a721f53bSRichard W.M. Jones return NULL; 483a721f53bSRichard W.M. Jones } 484145614a1SDaniel P. Berrange 4857a5ca864Sbellard int main(int argc, char **argv) 4867a5ca864Sbellard { 48726f54e9aSMarkus Armbruster BlockBackend *blk; 4887a5ca864Sbellard BlockDriverState *bs; 4897a5ca864Sbellard off_t dev_offset = 0; 4907423f417SEric Blake uint16_t nbdflags = 0; 491cd831bd7Sths bool disconnect = false; 492a721f53bSRichard W.M. Jones const char *bindto = NULL; 49348bec07eSDaniel P. Berrange const char *port = NULL; 49448bec07eSDaniel P. Berrange char *sockpath = NULL; 495a6ac2313SPaolo Bonzini char *device = NULL; 4967a5ca864Sbellard off_t fd_size; 4978c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4988c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 499b1a75b33SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:"; 5007a5ca864Sbellard struct option lopt[] = { 501aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 502aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 503aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 504aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 505aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 506aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 507aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 508aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 509aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 510aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 511aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 512aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 513aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 514aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 515aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 516aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 517aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 518aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 519aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 520aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 521aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 522aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 523aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 524aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 525b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 526aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 527aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 52839ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 529ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 530660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5317a5ca864Sbellard }; 5327a5ca864Sbellard int ch; 5337a5ca864Sbellard int opt_ind = 0; 5347a5ca864Sbellard char *end; 535f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5367a5ca864Sbellard int partition = -1; 5374fbec260SMax Reitz int ret = 0; 53839a5235cSPaolo Bonzini bool seen_cache = false; 539ded9d2d5SPaolo Bonzini bool seen_discard = false; 54039a5235cSPaolo Bonzini bool seen_aio = false; 541a517e88bSPaolo Bonzini pthread_t client_thread; 542e6b63677SDaniel P. Berrange const char *fmt = NULL; 54334b5d2c6SMax Reitz Error *local_err = NULL; 544b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5454fbec260SMax Reitz QDict *options = NULL; 5463d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 547b1a75b33SEric Blake const char *export_description = NULL; 548145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 54977c9aaefSDaniel P. Berrange bool imageOpts = false; 5506effd5bfSKevin Wolf bool writethrough = true; 55139ca463eSDenis V. Lunev char *trace_file = NULL; 552ffb31e1dSMax Reitz bool fork_process = false; 553ffb31e1dSMax Reitz int old_stderr = -1; 554a721f53bSRichard W.M. Jones unsigned socket_activation; 5557a5ca864Sbellard 556a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 557a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 558a517e88bSPaolo Bonzini */ 559bb345110SPaolo Bonzini struct sigaction sa_sigterm; 560bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 561bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 562bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 563c2297088SDaniel P. Berrange 564041e32b8SMax Reitz #ifdef CONFIG_POSIX 565041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 566041e32b8SMax Reitz #endif 567041e32b8SMax Reitz 568fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 569e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 570c2297088SDaniel P. Berrange 5710ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5720ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 57339ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 57410f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 575bb345110SPaolo Bonzini 5767a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5777a5ca864Sbellard switch (ch) { 5787a5ca864Sbellard case 's': 5792f726488Sths flags |= BDRV_O_SNAPSHOT; 5802f726488Sths break; 5812f726488Sths case 'n': 58239a5235cSPaolo Bonzini optarg = (char *) "none"; 58339a5235cSPaolo Bonzini /* fallthrough */ 58439a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 58539a5235cSPaolo Bonzini if (seen_cache) { 58685b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 58785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 58839a5235cSPaolo Bonzini } 58939a5235cSPaolo Bonzini seen_cache = true; 5906effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 59185b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 59285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 59339a5235cSPaolo Bonzini } 5947a5ca864Sbellard break; 59539a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 59639a5235cSPaolo Bonzini if (seen_aio) { 59785b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 59885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 59939a5235cSPaolo Bonzini } 60039a5235cSPaolo Bonzini seen_aio = true; 60139a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 60239a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 60339a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 60439a5235cSPaolo Bonzini /* this is the default */ 60539a5235cSPaolo Bonzini } else { 60685b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 60785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60839a5235cSPaolo Bonzini } 60939a5235cSPaolo Bonzini break; 610ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 611ded9d2d5SPaolo Bonzini if (seen_discard) { 61285b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 61385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 614ded9d2d5SPaolo Bonzini } 615ded9d2d5SPaolo Bonzini seen_discard = true; 616ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 61785b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 61885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 619ded9d2d5SPaolo Bonzini } 620ded9d2d5SPaolo Bonzini break; 621b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 622b3838a40SPeter Lieven detect_zeroes = 623f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 624b3838a40SPeter Lieven optarg, 625b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 626b3838a40SPeter Lieven &local_err); 627b3838a40SPeter Lieven if (local_err) { 628c29b77f9SMarkus Armbruster error_reportf_err(local_err, 629c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 63085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 631b3838a40SPeter Lieven } 632b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 633b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 63485b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 635b3838a40SPeter Lieven "without setting discard operation to unmap"); 63685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 637b3838a40SPeter Lieven } 638b3838a40SPeter Lieven break; 6397a5ca864Sbellard case 'b': 6407a5ca864Sbellard bindto = optarg; 6417a5ca864Sbellard break; 6427a5ca864Sbellard case 'p': 64348bec07eSDaniel P. Berrange port = optarg; 6447a5ca864Sbellard break; 6457a5ca864Sbellard case 'o': 6467a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6477a5ca864Sbellard if (*end) { 64885b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 64985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6507a5ca864Sbellard } 6517a5ca864Sbellard if (dev_offset < 0) { 65285b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 65385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6547a5ca864Sbellard } 6557a5ca864Sbellard break; 6568c116b0eSWenchao Xia case 'l': 6578c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 65870b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 65970b94331SMarkus Armbruster optarg, false); 6608c116b0eSWenchao Xia if (!sn_opts) { 66185b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6628c116b0eSWenchao Xia optarg); 66385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6648c116b0eSWenchao Xia } 6658c116b0eSWenchao Xia } else { 6668c116b0eSWenchao Xia sn_id_or_name = optarg; 6678c116b0eSWenchao Xia } 6688c116b0eSWenchao Xia /* fall through */ 6697a5ca864Sbellard case 'r': 670b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 67107108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6727a5ca864Sbellard break; 6737a5ca864Sbellard case 'P': 6747a5ca864Sbellard partition = strtol(optarg, &end, 0); 675713cc671SPeter Lieven if (*end) { 67685b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 67785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 678713cc671SPeter Lieven } 679713cc671SPeter Lieven if (partition < 1 || partition > 8) { 68085b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 68185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 682713cc671SPeter Lieven } 6837a5ca864Sbellard break; 684cd831bd7Sths case 'k': 685b32f6c28SPaolo Bonzini sockpath = optarg; 686713cc671SPeter Lieven if (sockpath[0] != '/') { 6879af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 68885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 689713cc671SPeter Lieven } 690cd831bd7Sths break; 691cd831bd7Sths case 'd': 692cd831bd7Sths disconnect = true; 693cd831bd7Sths break; 694cd831bd7Sths case 'c': 695cd831bd7Sths device = optarg; 696cd831bd7Sths break; 6973b05a8e9Sths case 'e': 6983b05a8e9Sths shared = strtol(optarg, &end, 0); 6993b05a8e9Sths if (*end) { 70085b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 70185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7023b05a8e9Sths } 7033b05a8e9Sths if (shared < 1) { 7049af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 70585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7063b05a8e9Sths } 7073b05a8e9Sths break; 708e6b63677SDaniel P. Berrange case 'f': 709e6b63677SDaniel P. Berrange fmt = optarg; 710e6b63677SDaniel P. Berrange break; 71175818250Sths case 't': 71275818250Sths persistent = 1; 71375818250Sths break; 7143d4b2f9cSDaniel P. Berrange case 'x': 7153d4b2f9cSDaniel P. Berrange export_name = optarg; 7163d4b2f9cSDaniel P. Berrange break; 717b1a75b33SEric Blake case 'D': 718b1a75b33SEric Blake export_description = optarg; 719b1a75b33SEric Blake break; 7207a5ca864Sbellard case 'v': 7217a5ca864Sbellard verbose = 1; 7227a5ca864Sbellard break; 7237a5ca864Sbellard case 'V': 7247a5ca864Sbellard version(argv[0]); 7257a5ca864Sbellard exit(0); 7267a5ca864Sbellard break; 7277a5ca864Sbellard case 'h': 7287a5ca864Sbellard usage(argv[0]); 7297a5ca864Sbellard exit(0); 7307a5ca864Sbellard break; 7317a5ca864Sbellard case '?': 73285b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 73385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7340ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7350ab3b337SDaniel P. Berrange QemuOpts *opts; 7360ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7370ab3b337SDaniel P. Berrange optarg, true); 7380ab3b337SDaniel P. Berrange if (!opts) { 7390ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7400ab3b337SDaniel P. Berrange } 7410ab3b337SDaniel P. Berrange } break; 742145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 743145614a1SDaniel P. Berrange tlscredsid = optarg; 744145614a1SDaniel P. Berrange break; 74577c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 74677c9aaefSDaniel P. Berrange imageOpts = true; 74777c9aaefSDaniel P. Berrange break; 74839ca463eSDenis V. Lunev case 'T': 74939ca463eSDenis V. Lunev g_free(trace_file); 75039ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 75139ca463eSDenis V. Lunev break; 752ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 753ffb31e1dSMax Reitz fork_process = true; 754ffb31e1dSMax Reitz break; 7557a5ca864Sbellard } 7567a5ca864Sbellard } 7577a5ca864Sbellard 7587a5ca864Sbellard if ((argc - optind) != 1) { 759433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 760433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 76185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7627a5ca864Sbellard } 7637a5ca864Sbellard 7640ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7650ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 76651b9b478SMarkus Armbruster NULL, NULL)) { 7670ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7680ab3b337SDaniel P. Berrange } 7690ab3b337SDaniel P. Berrange 77039ca463eSDenis V. Lunev if (!trace_init_backends()) { 77139ca463eSDenis V. Lunev exit(1); 77239ca463eSDenis V. Lunev } 77339ca463eSDenis V. Lunev trace_init_file(trace_file); 77439ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 77539ca463eSDenis V. Lunev 776a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 777a721f53bSRichard W.M. Jones if (socket_activation == 0) { 778a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 779a721f53bSRichard W.M. Jones } else { 780a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 781a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 782a721f53bSRichard W.M. Jones bindto, port); 783a721f53bSRichard W.M. Jones if (err_msg != NULL) { 784a721f53bSRichard W.M. Jones error_report("%s", err_msg); 785a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 786a721f53bSRichard W.M. Jones } 78753fabd4bSPaolo Bonzini 78853fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 78953fabd4bSPaolo Bonzini if (socket_activation > 1) { 79053fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 79153fabd4bSPaolo Bonzini "LISTEN_FDS"); 79253fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 79353fabd4bSPaolo Bonzini } 794a721f53bSRichard W.M. Jones } 795a721f53bSRichard W.M. Jones 796145614a1SDaniel P. Berrange if (tlscredsid) { 797145614a1SDaniel P. Berrange if (sockpath) { 798145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 799145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 800145614a1SDaniel P. Berrange } 801145614a1SDaniel P. Berrange if (device) { 802145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 803145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 804145614a1SDaniel P. Berrange } 805145614a1SDaniel P. Berrange if (!export_name) { 806145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 807145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 808145614a1SDaniel P. Berrange export_name = ""; 809145614a1SDaniel P. Berrange } 810145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 811145614a1SDaniel P. Berrange if (local_err) { 812145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 813145614a1SDaniel P. Berrange error_get_pretty(local_err)); 814145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 815145614a1SDaniel P. Berrange } 816145614a1SDaniel P. Berrange } 817145614a1SDaniel P. Berrange 818cd831bd7Sths if (disconnect) { 819d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 820d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 82185b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 82285b01e09SMarkus Armbruster strerror(errno)); 82385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 824fc19f8a0SPaolo Bonzini } 825d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 826cd831bd7Sths 827d0d6ff58SDaniel P. Berrange close(nbdfd); 828cd831bd7Sths 829cd831bd7Sths printf("%s disconnected\n", argv[optind]); 830cd831bd7Sths 831cd831bd7Sths return 0; 832cd831bd7Sths } 833cd831bd7Sths 834ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 835c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 836c1f8fdc3SPaolo Bonzini pid_t pid; 837c1f8fdc3SPaolo Bonzini int ret; 838c1f8fdc3SPaolo Bonzini 839fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 84085b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 84185b01e09SMarkus Armbruster strerror(errno)); 84285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 843c1f8fdc3SPaolo Bonzini } 844c1f8fdc3SPaolo Bonzini 845c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 846c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 847c1f8fdc3SPaolo Bonzini */ 848c1f8fdc3SPaolo Bonzini pid = fork(); 84970d4739eSMax Reitz if (pid < 0) { 85085b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 85185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 85270d4739eSMax Reitz } else if (pid == 0) { 853c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 8549faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 855c1f8fdc3SPaolo Bonzini 856c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 857ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 858c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 859fc19f8a0SPaolo Bonzini if (ret < 0) { 86085b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 86185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 862c1f8fdc3SPaolo Bonzini } 863c1f8fdc3SPaolo Bonzini 864c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 865c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 866c1f8fdc3SPaolo Bonzini } else { 867c1f8fdc3SPaolo Bonzini bool errors = false; 868c1f8fdc3SPaolo Bonzini char *buf; 869c1f8fdc3SPaolo Bonzini 870c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 871c1f8fdc3SPaolo Bonzini * it closes the pipe. 872c1f8fdc3SPaolo Bonzini */ 873c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 874c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 875c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 876c1f8fdc3SPaolo Bonzini errors = true; 877c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 878fc19f8a0SPaolo Bonzini if (ret < 0) { 879c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 880c1f8fdc3SPaolo Bonzini } 881c1f8fdc3SPaolo Bonzini } 882fc19f8a0SPaolo Bonzini if (ret < 0) { 88385b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 88485b01e09SMarkus Armbruster strerror(errno)); 88585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 886c1f8fdc3SPaolo Bonzini } 887c1f8fdc3SPaolo Bonzini 888c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 889c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 890c1f8fdc3SPaolo Bonzini */ 891c1f8fdc3SPaolo Bonzini exit(errors); 892c1f8fdc3SPaolo Bonzini } 893c1f8fdc3SPaolo Bonzini } 894c1f8fdc3SPaolo Bonzini 895a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 896b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 897b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 898cd831bd7Sths } 899cd831bd7Sths 900e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 901a721f53bSRichard W.M. Jones if (socket_activation == 0) { 90248bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 903e4849c1dSDaniel P. Berrange if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { 904e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 905a721f53bSRichard W.M. Jones error_report_err(local_err); 906e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 907a721f53bSRichard W.M. Jones } 908a721f53bSRichard W.M. Jones } else { 909e4849c1dSDaniel P. Berrange size_t i; 910a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 911e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 912e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 913e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 914a721f53bSRichard W.M. Jones &local_err); 915e4849c1dSDaniel P. Berrange if (sioc == NULL) { 916e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 917a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 918a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 919a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 920a721f53bSRichard W.M. Jones } 921e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 922e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 923e4849c1dSDaniel P. Berrange } 924a721f53bSRichard W.M. Jones } 92548bec07eSDaniel P. Berrange 9262f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 927565f65d2SMarkus Armbruster error_report_err(local_err); 9282f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9292f78e491SChrysostomos Nanakos } 930802ddc37SPaolo Bonzini bdrv_init(); 931802ddc37SPaolo Bonzini atexit(bdrv_close_all); 932802ddc37SPaolo Bonzini 93377c9aaefSDaniel P. Berrange srcpath = argv[optind]; 93477c9aaefSDaniel P. Berrange if (imageOpts) { 93577c9aaefSDaniel P. Berrange QemuOpts *opts; 93677c9aaefSDaniel P. Berrange if (fmt) { 93777c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 93877c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 93977c9aaefSDaniel P. Berrange } 94077c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 94177c9aaefSDaniel P. Berrange if (!opts) { 94277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 94377c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 94477c9aaefSDaniel P. Berrange } 94577c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 94677c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 947efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 94877c9aaefSDaniel P. Berrange } else { 949e6b63677SDaniel P. Berrange if (fmt) { 9504fbec260SMax Reitz options = qdict_new(); 95146f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 952e6b63677SDaniel P. Berrange } 953efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 95477c9aaefSDaniel P. Berrange } 95577c9aaefSDaniel P. Berrange 9564fbec260SMax Reitz if (!blk) { 957c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 958c29b77f9SMarkus Armbruster argv[optind]); 95985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 960802ddc37SPaolo Bonzini } 9614fbec260SMax Reitz bs = blk_bs(blk); 962802ddc37SPaolo Bonzini 9636effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 9646effd5bfSKevin Wolf 9658c116b0eSWenchao Xia if (sn_opts) { 9668c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 9678c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 9688c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 9698c116b0eSWenchao Xia &local_err); 9708c116b0eSWenchao Xia } else if (sn_id_or_name) { 9718c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 9728c116b0eSWenchao Xia &local_err); 9738c116b0eSWenchao Xia } 9748c116b0eSWenchao Xia if (ret < 0) { 975c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 97685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9778c116b0eSWenchao Xia } 9788c116b0eSWenchao Xia 979b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 9804c58e80aSMax Reitz fd_size = blk_getlength(blk); 98198f44bbeSMax Reitz if (fd_size < 0) { 98285b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 98398f44bbeSMax Reitz strerror(-fd_size)); 98485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 98598f44bbeSMax Reitz } 986802ddc37SPaolo Bonzini 987e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 988e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 989e424b655STomáš Golembiovský "(%lld)", 990e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 991e424b655STomáš Golembiovský exit(EXIT_FAILURE); 992e424b655STomáš Golembiovský } 993e424b655STomáš Golembiovský fd_size -= dev_offset; 994e424b655STomáš Golembiovský 995185b4338SPaolo Bonzini if (partition != -1) { 9964c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 997185b4338SPaolo Bonzini if (ret < 0) { 99885b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 999a4699e55SMarkus Armbruster strerror(-ret)); 100085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1001802ddc37SPaolo Bonzini } 1002185b4338SPaolo Bonzini } 1003802ddc37SPaolo Bonzini 1004cd7fca95SKevin Wolf exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, 1005cd7fca95SKevin Wolf writethrough, NULL, &local_err); 100698f44bbeSMax Reitz if (!exp) { 10074fffeb5eSMarkus Armbruster error_report_err(local_err); 100885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 100998f44bbeSMax Reitz } 10103d4b2f9cSDaniel P. Berrange if (export_name) { 10113d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 1012b1a75b33SEric Blake nbd_export_set_description(exp, export_description); 10133d4b2f9cSDaniel P. Berrange newproto = true; 1014b1a75b33SEric Blake } else if (export_description) { 1015b1a75b33SEric Blake error_report("Export description requires an export name"); 1016b1a75b33SEric Blake exit(EXIT_FAILURE); 10173d4b2f9cSDaniel P. Berrange } 10183b05a8e9Sths 1019f1ef5555SPaolo Bonzini if (device) { 1020f1ef5555SPaolo Bonzini int ret; 1021f1ef5555SPaolo Bonzini 1022a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1023f1ef5555SPaolo Bonzini if (ret != 0) { 102485b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 102585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1026f1ef5555SPaolo Bonzini } 1027f1ef5555SPaolo Bonzini } else { 1028f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1029f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1030f1ef5555SPaolo Bonzini } 1031f1ef5555SPaolo Bonzini 1032d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10337a5ca864Sbellard 10349faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 10359faf31b6SMichael Tokarev * to free any busy filesystems */ 10369faf31b6SMichael Tokarev if (chdir("/") < 0) { 103785b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 103885b01e09SMarkus Armbruster strerror(errno)); 103985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10409faf31b6SMichael Tokarev } 10419faf31b6SMichael Tokarev 1042ffb31e1dSMax Reitz if (fork_process) { 1043ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1044ffb31e1dSMax Reitz close(old_stderr); 1045ffb31e1dSMax Reitz } 1046ffb31e1dSMax Reitz 10477860a380SPaolo Bonzini state = RUNNING; 10483b05a8e9Sths do { 1049a61c6782SPaolo Bonzini main_loop_wait(false); 10507860a380SPaolo Bonzini if (state == TERMINATE) { 10517860a380SPaolo Bonzini state = TERMINATING; 1052af49bbbeSPaolo Bonzini nbd_export_close(exp); 10532c8d9f06SPaolo Bonzini nbd_export_put(exp); 10547860a380SPaolo Bonzini exp = NULL; 10557860a380SPaolo Bonzini } 10567860a380SPaolo Bonzini } while (state != TERMINATED); 10572c8d9f06SPaolo Bonzini 105826f54e9aSMarkus Armbruster blk_unref(blk); 1059b32f6c28SPaolo Bonzini if (sockpath) { 1060b32f6c28SPaolo Bonzini unlink(sockpath); 1061b32f6c28SPaolo Bonzini } 10627a5ca864Sbellard 10638c116b0eSWenchao Xia qemu_opts_del(sn_opts); 10648c116b0eSWenchao Xia 1065a517e88bSPaolo Bonzini if (device) { 1066a517e88bSPaolo Bonzini void *ret; 1067a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1068a517e88bSPaolo Bonzini exit(ret != NULL); 1069a517e88bSPaolo Bonzini } else { 1070a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1071a517e88bSPaolo Bonzini } 10727a5ca864Sbellard } 1073