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" 20da34e65cSMarkus Armbruster #include "qapi/error.h" 215a61cb60SStefan Weil #include "qemu-common.h" 22f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2326f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 24b3838a40SPeter Lieven #include "block/block_int.h" 25737e150eSPaolo Bonzini #include "block/nbd.h" 266a1751b7SAlex Bligh #include "qemu/main-loop.h" 27537b41f5SPaolo Bonzini #include "qemu/error-report.h" 280ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 29*58369e22SPaolo Bonzini #include "qemu/bswap.h" 308c116b0eSWenchao Xia #include "block/snapshot.h" 31b3838a40SPeter Lieven #include "qapi/util.h" 32d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 330ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 34d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 35c2297088SDaniel P. Berrange #include "crypto/init.h" 367a5ca864Sbellard 377a5ca864Sbellard #include <getopt.h> 382bff4b6fSBlue Swirl #include <libgen.h> 39a517e88bSPaolo Bonzini #include <pthread.h> 40cd831bd7Sths 41cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 42fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 43fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 44fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 45fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 46fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 48fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 497a5ca864Sbellard 50bd31c214SEric Blake #define MBR_SIZE 512 51bd31c214SEric Blake 52af49bbbeSPaolo Bonzini static NBDExport *exp; 533d4b2f9cSDaniel P. Berrange static bool newproto; 54b1d8e52eSblueswir1 static int verbose; 55a517e88bSPaolo Bonzini static char *srcpath; 5648bec07eSDaniel P. Berrange static SocketAddress *saddr; 577860a380SPaolo Bonzini static int persistent = 0; 587860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 59a61c6782SPaolo Bonzini static int shared = 1; 60a61c6782SPaolo Bonzini static int nb_fds; 61d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 62d0d6ff58SDaniel P. Berrange static int server_watch = -1; 63145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 647a5ca864Sbellard 657a5ca864Sbellard static void usage(const char *name) 667a5ca864Sbellard { 67b033cd86SPaolo Bonzini (printf) ( 687a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 697a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 707a5ca864Sbellard "\n" 717a5ca864Sbellard " -h, --help display this help and exit\n" 727a5ca864Sbellard " -V, --version output version information and exit\n" 737a5ca864Sbellard "\n" 74b033cd86SPaolo Bonzini "Connection properties:\n" 75b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 76b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 77b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 78b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 79b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 80b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 81b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 82332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 83b033cd86SPaolo Bonzini "\n" 84b033cd86SPaolo Bonzini "Exposing part of the image:\n" 85b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 86b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 87b033cd86SPaolo Bonzini "\n" 880ab3b337SDaniel P. Berrange "General purpose options:\n" 890ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 900ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 91b033cd86SPaolo Bonzini #ifdef __linux__ 92b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 93b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 94b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 95b033cd86SPaolo Bonzini "\n" 96b033cd86SPaolo Bonzini #endif 97b033cd86SPaolo Bonzini "\n" 98b033cd86SPaolo Bonzini "Block device options:\n" 994323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 100b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1018c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1028c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1038c116b0eSWenchao Xia " the temporary one\n" 1048c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1058c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1068c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1078c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1088c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 109b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 11039a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 11139a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 112b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1136883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 11477c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 115b033cd86SPaolo Bonzini "\n" 116b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 117c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1187a5ca864Sbellard } 1197a5ca864Sbellard 1207a5ca864Sbellard static void version(const char *name) 1217a5ca864Sbellard { 1227a5ca864Sbellard printf( 123315bc7aaSths "%s version 0.0.1\n" 1247a5ca864Sbellard "Written by Anthony Liguori.\n" 1257a5ca864Sbellard "\n" 1267a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1277a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1287a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 129315bc7aaSths , name); 1307a5ca864Sbellard } 1317a5ca864Sbellard 1327a5ca864Sbellard struct partition_record 1337a5ca864Sbellard { 1347a5ca864Sbellard uint8_t bootable; 1357a5ca864Sbellard uint8_t start_head; 1367a5ca864Sbellard uint32_t start_cylinder; 1377a5ca864Sbellard uint8_t start_sector; 1387a5ca864Sbellard uint8_t system; 1397a5ca864Sbellard uint8_t end_head; 1407a5ca864Sbellard uint8_t end_cylinder; 1417a5ca864Sbellard uint8_t end_sector; 1427a5ca864Sbellard uint32_t start_sector_abs; 1437a5ca864Sbellard uint32_t nb_sectors_abs; 1447a5ca864Sbellard }; 1457a5ca864Sbellard 1467a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1477a5ca864Sbellard { 1487a5ca864Sbellard r->bootable = p[0]; 1497a5ca864Sbellard r->start_head = p[1]; 1507a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1517a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1527a5ca864Sbellard r->system = p[4]; 1537a5ca864Sbellard r->end_head = p[5]; 1547a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1557a5ca864Sbellard r->end_sector = p[6] & 0x3f; 156ac97393dSMax Reitz 157ac97393dSMax Reitz r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); 158ac97393dSMax Reitz r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); 1597a5ca864Sbellard } 1607a5ca864Sbellard 1614c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1627a5ca864Sbellard off_t *offset, off_t *size) 1637a5ca864Sbellard { 1647a5ca864Sbellard struct partition_record mbr[4]; 165bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1667a5ca864Sbellard int i; 1677a5ca864Sbellard int ext_partnum = 4; 168cb7cf0e3SRyota Ozaki int ret; 1697a5ca864Sbellard 170bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 171bd31c214SEric Blake if (ret < 0) { 172a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 17385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 174cb7cf0e3SRyota Ozaki } 1757a5ca864Sbellard 1767a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 177185b4338SPaolo Bonzini return -EINVAL; 1787a5ca864Sbellard } 1797a5ca864Sbellard 1807a5ca864Sbellard for (i = 0; i < 4; i++) { 1817a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1827a5ca864Sbellard 183453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1847a5ca864Sbellard continue; 185453b07b1SMax Reitz } 1867a5ca864Sbellard 1877a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1887a5ca864Sbellard struct partition_record ext[4]; 189bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 1907a5ca864Sbellard int j; 1917a5ca864Sbellard 192bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 193bd31c214SEric Blake data1, sizeof(data1)); 194bd31c214SEric Blake if (ret < 0) { 195a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 19685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 197cb7cf0e3SRyota Ozaki } 1987a5ca864Sbellard 1997a5ca864Sbellard for (j = 0; j < 4; j++) { 2007a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 201453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2027a5ca864Sbellard continue; 203453b07b1SMax Reitz } 2047a5ca864Sbellard 2057a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2067a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2077a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2087a5ca864Sbellard return 0; 2097a5ca864Sbellard } 2107a5ca864Sbellard } 2117a5ca864Sbellard ext_partnum += 4; 2127a5ca864Sbellard } else if ((i + 1) == partition) { 2137a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2147a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2157a5ca864Sbellard return 0; 2167a5ca864Sbellard } 2177a5ca864Sbellard } 2187a5ca864Sbellard 219185b4338SPaolo Bonzini return -ENOENT; 2207a5ca864Sbellard } 2217a5ca864Sbellard 222bb345110SPaolo Bonzini static void termsig_handler(int signum) 223bb345110SPaolo Bonzini { 22423994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 225a61c6782SPaolo Bonzini qemu_notify_event(); 226bb345110SPaolo Bonzini } 227bb345110SPaolo Bonzini 228537b41f5SPaolo Bonzini 229a517e88bSPaolo Bonzini static void *show_parts(void *arg) 230cd831bd7Sths { 231a6ac2313SPaolo Bonzini char *device = arg; 232cd831bd7Sths int nbd; 233cd831bd7Sths 234cd831bd7Sths /* linux just needs an open() to trigger 235cd831bd7Sths * the partition table update 236cd831bd7Sths * but remember to load the module with max_part != 0 : 237cd831bd7Sths * modprobe nbd max_part=63 238cd831bd7Sths */ 239cd831bd7Sths nbd = open(device, O_RDWR); 240fc19f8a0SPaolo Bonzini if (nbd >= 0) { 241cd831bd7Sths close(nbd); 242cd831bd7Sths } 243a517e88bSPaolo Bonzini return NULL; 244a517e88bSPaolo Bonzini } 245a517e88bSPaolo Bonzini 246a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 247a517e88bSPaolo Bonzini { 248a6ac2313SPaolo Bonzini char *device = arg; 249a517e88bSPaolo Bonzini off_t size; 250a517e88bSPaolo Bonzini uint32_t nbdflags; 251d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 252d0d6ff58SDaniel P. Berrange int fd; 253a517e88bSPaolo Bonzini int ret; 254a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2551ce52846SMax Reitz Error *local_error = NULL; 256a517e88bSPaolo Bonzini 257d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 258d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 259d0d6ff58SDaniel P. Berrange saddr, 260d0d6ff58SDaniel P. Berrange &local_error) < 0) { 26148bec07eSDaniel P. Berrange error_report_err(local_error); 262a517e88bSPaolo Bonzini goto out; 263a517e88bSPaolo Bonzini } 264a517e88bSPaolo Bonzini 2651c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 266f95910feSDaniel P. Berrange NULL, NULL, NULL, 2673f472659SMax Reitz &size, &local_error); 268fc19f8a0SPaolo Bonzini if (ret < 0) { 2691ce52846SMax Reitz if (local_error) { 27078288671SMarkus Armbruster error_report_err(local_error); 2711ce52846SMax Reitz } 2720c544d73SPaolo Bonzini goto out_socket; 273a517e88bSPaolo Bonzini } 274a517e88bSPaolo Bonzini 275a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 276fc19f8a0SPaolo Bonzini if (fd < 0) { 277a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 278b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2790c544d73SPaolo Bonzini goto out_socket; 280a6ac2313SPaolo Bonzini } 281a6ac2313SPaolo Bonzini 2821c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 283fc19f8a0SPaolo Bonzini if (ret < 0) { 2840c544d73SPaolo Bonzini goto out_fd; 285a517e88bSPaolo Bonzini } 286a517e88bSPaolo Bonzini 287a517e88bSPaolo Bonzini /* update partition table */ 288a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 289a517e88bSPaolo Bonzini 290c1f8fdc3SPaolo Bonzini if (verbose) { 291a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 292a517e88bSPaolo Bonzini device, srcpath); 293c1f8fdc3SPaolo Bonzini } else { 294c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 295c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 296c1f8fdc3SPaolo Bonzini } 297a517e88bSPaolo Bonzini 298a517e88bSPaolo Bonzini ret = nbd_client(fd); 299a517e88bSPaolo Bonzini if (ret) { 3000c544d73SPaolo Bonzini goto out_fd; 301a517e88bSPaolo Bonzini } 302a517e88bSPaolo Bonzini close(fd); 303d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 304a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 305a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 306a517e88bSPaolo Bonzini 3070c544d73SPaolo Bonzini out_fd: 3080c544d73SPaolo Bonzini close(fd); 3090c544d73SPaolo Bonzini out_socket: 310d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 311a517e88bSPaolo Bonzini out: 312a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 313a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 314cd831bd7Sths } 315cd831bd7Sths 316e4afbf4fSFam Zheng static int nbd_can_accept(void) 317a61c6782SPaolo Bonzini { 318a61c6782SPaolo Bonzini return nb_fds < shared; 319a61c6782SPaolo Bonzini } 320a61c6782SPaolo Bonzini 3217860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3227860a380SPaolo Bonzini { 3237860a380SPaolo Bonzini assert(state == TERMINATING); 3247860a380SPaolo Bonzini state = TERMINATED; 3257860a380SPaolo Bonzini } 3267860a380SPaolo Bonzini 327d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 328e4afbf4fSFam Zheng 3291743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 330a61c6782SPaolo Bonzini { 331a61c6782SPaolo Bonzini nb_fds--; 3327860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3337860a380SPaolo Bonzini state = TERMINATE; 3347860a380SPaolo Bonzini } 335d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3367860a380SPaolo Bonzini nbd_client_put(client); 337a61c6782SPaolo Bonzini } 338a61c6782SPaolo Bonzini 339d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 340a61c6782SPaolo Bonzini { 341d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 342a61c6782SPaolo Bonzini 343d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 344d0d6ff58SDaniel P. Berrange NULL); 345d0d6ff58SDaniel P. Berrange if (!cioc) { 346d0d6ff58SDaniel P. Berrange return TRUE; 3470c544d73SPaolo Bonzini } 3480c544d73SPaolo Bonzini 3497860a380SPaolo Bonzini if (state >= TERMINATE) { 350d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 351d0d6ff58SDaniel P. Berrange return TRUE; 3527860a380SPaolo Bonzini } 3537860a380SPaolo Bonzini 354a61c6782SPaolo Bonzini nb_fds++; 355d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 356f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 357145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 358d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 359a61c6782SPaolo Bonzini 360d0d6ff58SDaniel P. Berrange return TRUE; 361d0d6ff58SDaniel P. Berrange } 362d0d6ff58SDaniel P. Berrange 363d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 364e4afbf4fSFam Zheng { 365e4afbf4fSFam Zheng if (nbd_can_accept()) { 366d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 367d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 368d0d6ff58SDaniel P. Berrange G_IO_IN, 369d0d6ff58SDaniel P. Berrange nbd_accept, 370d0d6ff58SDaniel P. Berrange NULL, NULL); 371d0d6ff58SDaniel P. Berrange } 372e4afbf4fSFam Zheng } else { 373d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 374d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 375d0d6ff58SDaniel P. Berrange server_watch = -1; 376d0d6ff58SDaniel P. Berrange } 377e4afbf4fSFam Zheng } 378e4afbf4fSFam Zheng } 379e4afbf4fSFam Zheng 38048bec07eSDaniel P. Berrange 38148bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 38248bec07eSDaniel P. Berrange const char *bindto, 38348bec07eSDaniel P. Berrange const char *port) 38448bec07eSDaniel P. Berrange { 38548bec07eSDaniel P. Berrange SocketAddress *saddr; 38648bec07eSDaniel P. Berrange 38748bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 38848bec07eSDaniel P. Berrange if (sockpath) { 3892d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 39032bafa8fSEric Blake saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 39132bafa8fSEric Blake saddr->u.q_unix.data->path = g_strdup(sockpath); 39248bec07eSDaniel P. Berrange } else { 3930399293eSEric Blake InetSocketAddress *inet; 3942d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 39532bafa8fSEric Blake inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); 3960399293eSEric Blake inet->host = g_strdup(bindto); 39748bec07eSDaniel P. Berrange if (port) { 3980399293eSEric Blake inet->port = g_strdup(port); 39948bec07eSDaniel P. Berrange } else { 4000399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 40148bec07eSDaniel P. Berrange } 40248bec07eSDaniel P. Berrange } 40348bec07eSDaniel P. Berrange 40448bec07eSDaniel P. Berrange return saddr; 40548bec07eSDaniel P. Berrange } 40648bec07eSDaniel P. Berrange 40748bec07eSDaniel P. Berrange 40877c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40977c9aaefSDaniel P. Berrange .name = "file", 41077c9aaefSDaniel P. Berrange .implied_opt_name = "file", 41177c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 41277c9aaefSDaniel P. Berrange .desc = { 41377c9aaefSDaniel P. Berrange /* no elements => accept any params */ 41477c9aaefSDaniel P. Berrange { /* end of list */ } 41577c9aaefSDaniel P. Berrange }, 41677c9aaefSDaniel P. Berrange }; 41777c9aaefSDaniel P. Berrange 4180ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4190ab3b337SDaniel P. Berrange .name = "object", 4200ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4210ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4220ab3b337SDaniel P. Berrange .desc = { 4230ab3b337SDaniel P. Berrange { } 4240ab3b337SDaniel P. Berrange }, 4250ab3b337SDaniel P. Berrange }; 4260ab3b337SDaniel P. Berrange 4270ab3b337SDaniel P. Berrange 428145614a1SDaniel P. Berrange 429145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 430145614a1SDaniel P. Berrange { 431145614a1SDaniel P. Berrange Object *obj; 432145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 433145614a1SDaniel P. Berrange 434145614a1SDaniel P. Berrange obj = object_resolve_path_component( 435145614a1SDaniel P. Berrange object_get_objects_root(), id); 436145614a1SDaniel P. Berrange if (!obj) { 437145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 438145614a1SDaniel P. Berrange id); 439145614a1SDaniel P. Berrange return NULL; 440145614a1SDaniel P. Berrange } 441145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 442145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 443145614a1SDaniel P. Berrange if (!creds) { 444145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 445145614a1SDaniel P. Berrange id); 446145614a1SDaniel P. Berrange return NULL; 447145614a1SDaniel P. Berrange } 448145614a1SDaniel P. Berrange 449145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 450145614a1SDaniel P. Berrange error_setg(errp, 451145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 452145614a1SDaniel P. Berrange return NULL; 453145614a1SDaniel P. Berrange } 454145614a1SDaniel P. Berrange object_ref(obj); 455145614a1SDaniel P. Berrange return creds; 456145614a1SDaniel P. Berrange } 457145614a1SDaniel P. Berrange 458145614a1SDaniel P. Berrange 4597a5ca864Sbellard int main(int argc, char **argv) 4607a5ca864Sbellard { 46126f54e9aSMarkus Armbruster BlockBackend *blk; 4627a5ca864Sbellard BlockDriverState *bs; 4637a5ca864Sbellard off_t dev_offset = 0; 464b90fb4b8SPaolo Bonzini uint32_t nbdflags = 0; 465cd831bd7Sths bool disconnect = false; 4667a5ca864Sbellard const char *bindto = "0.0.0.0"; 46748bec07eSDaniel P. Berrange const char *port = NULL; 46848bec07eSDaniel P. Berrange char *sockpath = NULL; 469a6ac2313SPaolo Bonzini char *device = NULL; 4707a5ca864Sbellard off_t fd_size; 4718c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4728c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 4733d4b2f9cSDaniel P. Berrange const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:"; 4747a5ca864Sbellard struct option lopt[] = { 475aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 476aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 477aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 478aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 479aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 480aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 481aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 482aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 483aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 484aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 485aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 486aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 487aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 488aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 489aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 490aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 491aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 492aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 493aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 494aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 495aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 496aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 497aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 498aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 499aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 500aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 501660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5027a5ca864Sbellard }; 5037a5ca864Sbellard int ch; 5047a5ca864Sbellard int opt_ind = 0; 5057a5ca864Sbellard char *end; 506f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5077a5ca864Sbellard int partition = -1; 5084fbec260SMax Reitz int ret = 0; 50939a5235cSPaolo Bonzini bool seen_cache = false; 510ded9d2d5SPaolo Bonzini bool seen_discard = false; 51139a5235cSPaolo Bonzini bool seen_aio = false; 512a517e88bSPaolo Bonzini pthread_t client_thread; 513e6b63677SDaniel P. Berrange const char *fmt = NULL; 51434b5d2c6SMax Reitz Error *local_err = NULL; 515b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5164fbec260SMax Reitz QDict *options = NULL; 5173d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 518145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 51977c9aaefSDaniel P. Berrange bool imageOpts = false; 5206effd5bfSKevin Wolf bool writethrough = true; 5217a5ca864Sbellard 522a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 523a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 524a517e88bSPaolo Bonzini */ 525bb345110SPaolo Bonzini struct sigaction sa_sigterm; 526bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 527bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 528bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 529c2297088SDaniel P. Berrange 530c2297088SDaniel P. Berrange if (qcrypto_init(&local_err) < 0) { 531c2297088SDaniel P. Berrange error_reportf_err(local_err, "cannot initialize crypto: "); 532c2297088SDaniel P. Berrange exit(1); 533c2297088SDaniel P. Berrange } 534c2297088SDaniel P. Berrange 5350ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5360ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 53710f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 538bb345110SPaolo Bonzini 5397a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5407a5ca864Sbellard switch (ch) { 5417a5ca864Sbellard case 's': 5422f726488Sths flags |= BDRV_O_SNAPSHOT; 5432f726488Sths break; 5442f726488Sths case 'n': 54539a5235cSPaolo Bonzini optarg = (char *) "none"; 54639a5235cSPaolo Bonzini /* fallthrough */ 54739a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 54839a5235cSPaolo Bonzini if (seen_cache) { 54985b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 55085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55139a5235cSPaolo Bonzini } 55239a5235cSPaolo Bonzini seen_cache = true; 5536effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 55485b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 55585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55639a5235cSPaolo Bonzini } 5577a5ca864Sbellard break; 55839a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 55939a5235cSPaolo Bonzini if (seen_aio) { 56085b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 56185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 56239a5235cSPaolo Bonzini } 56339a5235cSPaolo Bonzini seen_aio = true; 56439a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 56539a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 56639a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 56739a5235cSPaolo Bonzini /* this is the default */ 56839a5235cSPaolo Bonzini } else { 56985b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 57085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 57139a5235cSPaolo Bonzini } 57239a5235cSPaolo Bonzini break; 573ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 574ded9d2d5SPaolo Bonzini if (seen_discard) { 57585b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 57685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 577ded9d2d5SPaolo Bonzini } 578ded9d2d5SPaolo Bonzini seen_discard = true; 579ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 58085b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 58185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 582ded9d2d5SPaolo Bonzini } 583ded9d2d5SPaolo Bonzini break; 584b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 585b3838a40SPeter Lieven detect_zeroes = 586b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 587b3838a40SPeter Lieven optarg, 5887fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 589b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 590b3838a40SPeter Lieven &local_err); 591b3838a40SPeter Lieven if (local_err) { 592c29b77f9SMarkus Armbruster error_reportf_err(local_err, 593c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 59485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 595b3838a40SPeter Lieven } 596b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 597b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 59885b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 599b3838a40SPeter Lieven "without setting discard operation to unmap"); 60085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 601b3838a40SPeter Lieven } 602b3838a40SPeter Lieven break; 6037a5ca864Sbellard case 'b': 6047a5ca864Sbellard bindto = optarg; 6057a5ca864Sbellard break; 6067a5ca864Sbellard case 'p': 60748bec07eSDaniel P. Berrange port = optarg; 6087a5ca864Sbellard break; 6097a5ca864Sbellard case 'o': 6107a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6117a5ca864Sbellard if (*end) { 61285b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 61385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6147a5ca864Sbellard } 6157a5ca864Sbellard if (dev_offset < 0) { 61685b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 61785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6187a5ca864Sbellard } 6197a5ca864Sbellard break; 6208c116b0eSWenchao Xia case 'l': 6218c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 62270b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 62370b94331SMarkus Armbruster optarg, false); 6248c116b0eSWenchao Xia if (!sn_opts) { 62585b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6268c116b0eSWenchao Xia optarg); 62785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6288c116b0eSWenchao Xia } 6298c116b0eSWenchao Xia } else { 6308c116b0eSWenchao Xia sn_id_or_name = optarg; 6318c116b0eSWenchao Xia } 6328c116b0eSWenchao Xia /* fall through */ 6337a5ca864Sbellard case 'r': 634b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 63507108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6367a5ca864Sbellard break; 6377a5ca864Sbellard case 'P': 6387a5ca864Sbellard partition = strtol(optarg, &end, 0); 639713cc671SPeter Lieven if (*end) { 64085b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 64185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 642713cc671SPeter Lieven } 643713cc671SPeter Lieven if (partition < 1 || partition > 8) { 64485b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 64585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 646713cc671SPeter Lieven } 6477a5ca864Sbellard break; 648cd831bd7Sths case 'k': 649b32f6c28SPaolo Bonzini sockpath = optarg; 650713cc671SPeter Lieven if (sockpath[0] != '/') { 6519af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 65285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 653713cc671SPeter Lieven } 654cd831bd7Sths break; 655cd831bd7Sths case 'd': 656cd831bd7Sths disconnect = true; 657cd831bd7Sths break; 658cd831bd7Sths case 'c': 659cd831bd7Sths device = optarg; 660cd831bd7Sths break; 6613b05a8e9Sths case 'e': 6623b05a8e9Sths shared = strtol(optarg, &end, 0); 6633b05a8e9Sths if (*end) { 66485b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 66585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6663b05a8e9Sths } 6673b05a8e9Sths if (shared < 1) { 6689af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 66985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6703b05a8e9Sths } 6713b05a8e9Sths break; 672e6b63677SDaniel P. Berrange case 'f': 673e6b63677SDaniel P. Berrange fmt = optarg; 674e6b63677SDaniel P. Berrange break; 67575818250Sths case 't': 67675818250Sths persistent = 1; 67775818250Sths break; 6783d4b2f9cSDaniel P. Berrange case 'x': 6793d4b2f9cSDaniel P. Berrange export_name = optarg; 6803d4b2f9cSDaniel P. Berrange break; 6817a5ca864Sbellard case 'v': 6827a5ca864Sbellard verbose = 1; 6837a5ca864Sbellard break; 6847a5ca864Sbellard case 'V': 6857a5ca864Sbellard version(argv[0]); 6867a5ca864Sbellard exit(0); 6877a5ca864Sbellard break; 6887a5ca864Sbellard case 'h': 6897a5ca864Sbellard usage(argv[0]); 6907a5ca864Sbellard exit(0); 6917a5ca864Sbellard break; 6927a5ca864Sbellard case '?': 69385b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 69485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6950ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 6960ab3b337SDaniel P. Berrange QemuOpts *opts; 6970ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 6980ab3b337SDaniel P. Berrange optarg, true); 6990ab3b337SDaniel P. Berrange if (!opts) { 7000ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7010ab3b337SDaniel P. Berrange } 7020ab3b337SDaniel P. Berrange } break; 703145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 704145614a1SDaniel P. Berrange tlscredsid = optarg; 705145614a1SDaniel P. Berrange break; 70677c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 70777c9aaefSDaniel P. Berrange imageOpts = true; 70877c9aaefSDaniel P. Berrange break; 7097a5ca864Sbellard } 7107a5ca864Sbellard } 7117a5ca864Sbellard 7127a5ca864Sbellard if ((argc - optind) != 1) { 713433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 714433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 71585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7167a5ca864Sbellard } 7177a5ca864Sbellard 7180ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7190ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 72051b9b478SMarkus Armbruster NULL, NULL)) { 7210ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7220ab3b337SDaniel P. Berrange } 7230ab3b337SDaniel P. Berrange 724145614a1SDaniel P. Berrange if (tlscredsid) { 725145614a1SDaniel P. Berrange if (sockpath) { 726145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 727145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 728145614a1SDaniel P. Berrange } 729145614a1SDaniel P. Berrange if (device) { 730145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 731145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 732145614a1SDaniel P. Berrange } 733145614a1SDaniel P. Berrange if (!export_name) { 734145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 735145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 736145614a1SDaniel P. Berrange export_name = ""; 737145614a1SDaniel P. Berrange } 738145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 739145614a1SDaniel P. Berrange if (local_err) { 740145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 741145614a1SDaniel P. Berrange error_get_pretty(local_err)); 742145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 743145614a1SDaniel P. Berrange } 744145614a1SDaniel P. Berrange } 745145614a1SDaniel P. Berrange 746cd831bd7Sths if (disconnect) { 747d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 748d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 74985b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 75085b01e09SMarkus Armbruster strerror(errno)); 75185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 752fc19f8a0SPaolo Bonzini } 753d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 754cd831bd7Sths 755d0d6ff58SDaniel P. Berrange close(nbdfd); 756cd831bd7Sths 757cd831bd7Sths printf("%s disconnected\n", argv[optind]); 758cd831bd7Sths 759cd831bd7Sths return 0; 760cd831bd7Sths } 761cd831bd7Sths 762c1f8fdc3SPaolo Bonzini if (device && !verbose) { 763c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 764c1f8fdc3SPaolo Bonzini pid_t pid; 765c1f8fdc3SPaolo Bonzini int ret; 766c1f8fdc3SPaolo Bonzini 767fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 76885b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 76985b01e09SMarkus Armbruster strerror(errno)); 77085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 771c1f8fdc3SPaolo Bonzini } 772c1f8fdc3SPaolo Bonzini 773c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 774c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 775c1f8fdc3SPaolo Bonzini */ 776c1f8fdc3SPaolo Bonzini pid = fork(); 77770d4739eSMax Reitz if (pid < 0) { 77885b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 77985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 78070d4739eSMax Reitz } else if (pid == 0) { 781c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 7829faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 783c1f8fdc3SPaolo Bonzini 784c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 785c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 786fc19f8a0SPaolo Bonzini if (ret < 0) { 78785b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 78885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 789c1f8fdc3SPaolo Bonzini } 790c1f8fdc3SPaolo Bonzini 791c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 792c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 793c1f8fdc3SPaolo Bonzini } else { 794c1f8fdc3SPaolo Bonzini bool errors = false; 795c1f8fdc3SPaolo Bonzini char *buf; 796c1f8fdc3SPaolo Bonzini 797c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 798c1f8fdc3SPaolo Bonzini * it closes the pipe. 799c1f8fdc3SPaolo Bonzini */ 800c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 801c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 802c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 803c1f8fdc3SPaolo Bonzini errors = true; 804c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 805fc19f8a0SPaolo Bonzini if (ret < 0) { 806c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 807c1f8fdc3SPaolo Bonzini } 808c1f8fdc3SPaolo Bonzini } 809fc19f8a0SPaolo Bonzini if (ret < 0) { 81085b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 81185b01e09SMarkus Armbruster strerror(errno)); 81285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 813c1f8fdc3SPaolo Bonzini } 814c1f8fdc3SPaolo Bonzini 815c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 816c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 817c1f8fdc3SPaolo Bonzini */ 818c1f8fdc3SPaolo Bonzini exit(errors); 819c1f8fdc3SPaolo Bonzini } 820c1f8fdc3SPaolo Bonzini } 821c1f8fdc3SPaolo Bonzini 822a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 823b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 824b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 825cd831bd7Sths } 826cd831bd7Sths 82748bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 82848bec07eSDaniel P. Berrange 8292f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 830565f65d2SMarkus Armbruster error_report_err(local_err); 8312f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8322f78e491SChrysostomos Nanakos } 833802ddc37SPaolo Bonzini bdrv_init(); 834802ddc37SPaolo Bonzini atexit(bdrv_close_all); 835802ddc37SPaolo Bonzini 83677c9aaefSDaniel P. Berrange srcpath = argv[optind]; 83777c9aaefSDaniel P. Berrange if (imageOpts) { 83877c9aaefSDaniel P. Berrange QemuOpts *opts; 83977c9aaefSDaniel P. Berrange if (fmt) { 84077c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 84177c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 84277c9aaefSDaniel P. Berrange } 84377c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 84477c9aaefSDaniel P. Berrange if (!opts) { 84577c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 84677c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 84777c9aaefSDaniel P. Berrange } 84877c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 84977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 850efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 85177c9aaefSDaniel P. Berrange } else { 852e6b63677SDaniel P. Berrange if (fmt) { 8534fbec260SMax Reitz options = qdict_new(); 8544fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 855e6b63677SDaniel P. Berrange } 856efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 85777c9aaefSDaniel P. Berrange } 85877c9aaefSDaniel P. Berrange 8594fbec260SMax Reitz if (!blk) { 860c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 861c29b77f9SMarkus Armbruster argv[optind]); 86285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 863802ddc37SPaolo Bonzini } 8644fbec260SMax Reitz bs = blk_bs(blk); 865802ddc37SPaolo Bonzini 8666effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 8676effd5bfSKevin Wolf 8688c116b0eSWenchao Xia if (sn_opts) { 8698c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 8708c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 8718c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 8728c116b0eSWenchao Xia &local_err); 8738c116b0eSWenchao Xia } else if (sn_id_or_name) { 8748c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 8758c116b0eSWenchao Xia &local_err); 8768c116b0eSWenchao Xia } 8778c116b0eSWenchao Xia if (ret < 0) { 878c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 87985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8808c116b0eSWenchao Xia } 8818c116b0eSWenchao Xia 882b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 8834c58e80aSMax Reitz fd_size = blk_getlength(blk); 88498f44bbeSMax Reitz if (fd_size < 0) { 88585b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 88698f44bbeSMax Reitz strerror(-fd_size)); 88785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 88898f44bbeSMax Reitz } 889802ddc37SPaolo Bonzini 890185b4338SPaolo Bonzini if (partition != -1) { 8914c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 892185b4338SPaolo Bonzini if (ret < 0) { 89385b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 894a4699e55SMarkus Armbruster strerror(-ret)); 89585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 896802ddc37SPaolo Bonzini } 897185b4338SPaolo Bonzini } 898802ddc37SPaolo Bonzini 89998f44bbeSMax Reitz exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, 90098f44bbeSMax Reitz &local_err); 90198f44bbeSMax Reitz if (!exp) { 9024fffeb5eSMarkus Armbruster error_report_err(local_err); 90385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 90498f44bbeSMax Reitz } 9053d4b2f9cSDaniel P. Berrange if (export_name) { 9063d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 9073d4b2f9cSDaniel P. Berrange newproto = true; 9083d4b2f9cSDaniel P. Berrange } 9093b05a8e9Sths 910d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 911d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 912d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 91348bec07eSDaniel P. Berrange error_report_err(local_err); 9147a5ca864Sbellard return 1; 915a61c6782SPaolo Bonzini } 916f1ef5555SPaolo Bonzini 917f1ef5555SPaolo Bonzini if (device) { 918f1ef5555SPaolo Bonzini int ret; 919f1ef5555SPaolo Bonzini 920a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 921f1ef5555SPaolo Bonzini if (ret != 0) { 92285b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 92385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 924f1ef5555SPaolo Bonzini } 925f1ef5555SPaolo Bonzini } else { 926f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 927f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 928f1ef5555SPaolo Bonzini } 929f1ef5555SPaolo Bonzini 930d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9317a5ca864Sbellard 9329faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9339faf31b6SMichael Tokarev * to free any busy filesystems */ 9349faf31b6SMichael Tokarev if (chdir("/") < 0) { 93585b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 93685b01e09SMarkus Armbruster strerror(errno)); 93785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9389faf31b6SMichael Tokarev } 9399faf31b6SMichael Tokarev 9407860a380SPaolo Bonzini state = RUNNING; 9413b05a8e9Sths do { 942a61c6782SPaolo Bonzini main_loop_wait(false); 9437860a380SPaolo Bonzini if (state == TERMINATE) { 9447860a380SPaolo Bonzini state = TERMINATING; 945af49bbbeSPaolo Bonzini nbd_export_close(exp); 9462c8d9f06SPaolo Bonzini nbd_export_put(exp); 9477860a380SPaolo Bonzini exp = NULL; 9487860a380SPaolo Bonzini } 9497860a380SPaolo Bonzini } while (state != TERMINATED); 9502c8d9f06SPaolo Bonzini 95126f54e9aSMarkus Armbruster blk_unref(blk); 952b32f6c28SPaolo Bonzini if (sockpath) { 953b32f6c28SPaolo Bonzini unlink(sockpath); 954b32f6c28SPaolo Bonzini } 9557a5ca864Sbellard 9568c116b0eSWenchao Xia qemu_opts_del(sn_opts); 9578c116b0eSWenchao Xia 958a517e88bSPaolo Bonzini if (device) { 959a517e88bSPaolo Bonzini void *ret; 960a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 961a517e88bSPaolo Bonzini exit(ret != NULL); 962a517e88bSPaolo Bonzini } else { 963a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 964a517e88bSPaolo Bonzini } 9657a5ca864Sbellard } 966