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" 298c116b0eSWenchao Xia #include "block/snapshot.h" 30b3838a40SPeter Lieven #include "qapi/util.h" 31d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 320ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 33d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 34*c2297088SDaniel P. Berrange #include "crypto/init.h" 357a5ca864Sbellard 367a5ca864Sbellard #include <getopt.h> 372bff4b6fSBlue Swirl #include <libgen.h> 38a517e88bSPaolo Bonzini #include <pthread.h> 39cd831bd7Sths 40cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 41fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 42fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 43fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 44fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 45fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 46fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 487a5ca864Sbellard 49af49bbbeSPaolo Bonzini static NBDExport *exp; 503d4b2f9cSDaniel P. Berrange static bool newproto; 51b1d8e52eSblueswir1 static int verbose; 52a517e88bSPaolo Bonzini static char *srcpath; 5348bec07eSDaniel P. Berrange static SocketAddress *saddr; 547860a380SPaolo Bonzini static int persistent = 0; 557860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 56a61c6782SPaolo Bonzini static int shared = 1; 57a61c6782SPaolo Bonzini static int nb_fds; 58d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 59d0d6ff58SDaniel P. Berrange static int server_watch = -1; 60145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 617a5ca864Sbellard 627a5ca864Sbellard static void usage(const char *name) 637a5ca864Sbellard { 64b033cd86SPaolo Bonzini (printf) ( 657a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 667a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 677a5ca864Sbellard "\n" 687a5ca864Sbellard " -h, --help display this help and exit\n" 697a5ca864Sbellard " -V, --version output version information and exit\n" 707a5ca864Sbellard "\n" 71b033cd86SPaolo Bonzini "Connection properties:\n" 72b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 73b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 74b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 75b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 76b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 77b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 78b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 79332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 80b033cd86SPaolo Bonzini "\n" 81b033cd86SPaolo Bonzini "Exposing part of the image:\n" 82b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 83b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 84b033cd86SPaolo Bonzini "\n" 850ab3b337SDaniel P. Berrange "General purpose options:\n" 860ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 870ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 88b033cd86SPaolo Bonzini #ifdef __linux__ 89b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 90b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 91b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 92b033cd86SPaolo Bonzini "\n" 93b033cd86SPaolo Bonzini #endif 94b033cd86SPaolo Bonzini "\n" 95b033cd86SPaolo Bonzini "Block device options:\n" 964323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 97b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 988c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 998c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1008c116b0eSWenchao Xia " the temporary one\n" 1018c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1028c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1038c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1048c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1058c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 106b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 10739a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 10839a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 109b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1106883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 11177c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 112b033cd86SPaolo Bonzini "\n" 113b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 114c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1157a5ca864Sbellard } 1167a5ca864Sbellard 1177a5ca864Sbellard static void version(const char *name) 1187a5ca864Sbellard { 1197a5ca864Sbellard printf( 120315bc7aaSths "%s version 0.0.1\n" 1217a5ca864Sbellard "Written by Anthony Liguori.\n" 1227a5ca864Sbellard "\n" 1237a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1247a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1257a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 126315bc7aaSths , name); 1277a5ca864Sbellard } 1287a5ca864Sbellard 1297a5ca864Sbellard struct partition_record 1307a5ca864Sbellard { 1317a5ca864Sbellard uint8_t bootable; 1327a5ca864Sbellard uint8_t start_head; 1337a5ca864Sbellard uint32_t start_cylinder; 1347a5ca864Sbellard uint8_t start_sector; 1357a5ca864Sbellard uint8_t system; 1367a5ca864Sbellard uint8_t end_head; 1377a5ca864Sbellard uint8_t end_cylinder; 1387a5ca864Sbellard uint8_t end_sector; 1397a5ca864Sbellard uint32_t start_sector_abs; 1407a5ca864Sbellard uint32_t nb_sectors_abs; 1417a5ca864Sbellard }; 1427a5ca864Sbellard 1437a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1447a5ca864Sbellard { 1457a5ca864Sbellard r->bootable = p[0]; 1467a5ca864Sbellard r->start_head = p[1]; 1477a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1487a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1497a5ca864Sbellard r->system = p[4]; 1507a5ca864Sbellard r->end_head = p[5]; 1517a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1527a5ca864Sbellard r->end_sector = p[6] & 0x3f; 153ac97393dSMax Reitz 154ac97393dSMax Reitz r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); 155ac97393dSMax Reitz r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); 1567a5ca864Sbellard } 1577a5ca864Sbellard 1584c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1597a5ca864Sbellard off_t *offset, off_t *size) 1607a5ca864Sbellard { 1617a5ca864Sbellard struct partition_record mbr[4]; 1627a5ca864Sbellard uint8_t data[512]; 1637a5ca864Sbellard int i; 1647a5ca864Sbellard int ext_partnum = 4; 165cb7cf0e3SRyota Ozaki int ret; 1667a5ca864Sbellard 1674c58e80aSMax Reitz if ((ret = blk_read(blk, 0, data, 1)) < 0) { 168a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 16985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 170cb7cf0e3SRyota Ozaki } 1717a5ca864Sbellard 1727a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 173185b4338SPaolo Bonzini return -EINVAL; 1747a5ca864Sbellard } 1757a5ca864Sbellard 1767a5ca864Sbellard for (i = 0; i < 4; i++) { 1777a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1787a5ca864Sbellard 179453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1807a5ca864Sbellard continue; 181453b07b1SMax Reitz } 1827a5ca864Sbellard 1837a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1847a5ca864Sbellard struct partition_record ext[4]; 1857a5ca864Sbellard uint8_t data1[512]; 1867a5ca864Sbellard int j; 1877a5ca864Sbellard 1884c58e80aSMax Reitz if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) { 189a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 19085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 191cb7cf0e3SRyota Ozaki } 1927a5ca864Sbellard 1937a5ca864Sbellard for (j = 0; j < 4; j++) { 1947a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 195453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 1967a5ca864Sbellard continue; 197453b07b1SMax Reitz } 1987a5ca864Sbellard 1997a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2007a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2017a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2027a5ca864Sbellard return 0; 2037a5ca864Sbellard } 2047a5ca864Sbellard } 2057a5ca864Sbellard ext_partnum += 4; 2067a5ca864Sbellard } else if ((i + 1) == partition) { 2077a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2087a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2097a5ca864Sbellard return 0; 2107a5ca864Sbellard } 2117a5ca864Sbellard } 2127a5ca864Sbellard 213185b4338SPaolo Bonzini return -ENOENT; 2147a5ca864Sbellard } 2157a5ca864Sbellard 216bb345110SPaolo Bonzini static void termsig_handler(int signum) 217bb345110SPaolo Bonzini { 2187860a380SPaolo Bonzini state = TERMINATE; 219a61c6782SPaolo Bonzini qemu_notify_event(); 220bb345110SPaolo Bonzini } 221bb345110SPaolo Bonzini 222537b41f5SPaolo Bonzini 223a517e88bSPaolo Bonzini static void *show_parts(void *arg) 224cd831bd7Sths { 225a6ac2313SPaolo Bonzini char *device = arg; 226cd831bd7Sths int nbd; 227cd831bd7Sths 228cd831bd7Sths /* linux just needs an open() to trigger 229cd831bd7Sths * the partition table update 230cd831bd7Sths * but remember to load the module with max_part != 0 : 231cd831bd7Sths * modprobe nbd max_part=63 232cd831bd7Sths */ 233cd831bd7Sths nbd = open(device, O_RDWR); 234fc19f8a0SPaolo Bonzini if (nbd >= 0) { 235cd831bd7Sths close(nbd); 236cd831bd7Sths } 237a517e88bSPaolo Bonzini return NULL; 238a517e88bSPaolo Bonzini } 239a517e88bSPaolo Bonzini 240a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 241a517e88bSPaolo Bonzini { 242a6ac2313SPaolo Bonzini char *device = arg; 243a517e88bSPaolo Bonzini off_t size; 244a517e88bSPaolo Bonzini uint32_t nbdflags; 245d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 246d0d6ff58SDaniel P. Berrange int fd; 247a517e88bSPaolo Bonzini int ret; 248a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2491ce52846SMax Reitz Error *local_error = NULL; 250a517e88bSPaolo Bonzini 251d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 252d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 253d0d6ff58SDaniel P. Berrange saddr, 254d0d6ff58SDaniel P. Berrange &local_error) < 0) { 25548bec07eSDaniel P. Berrange error_report_err(local_error); 256a517e88bSPaolo Bonzini goto out; 257a517e88bSPaolo Bonzini } 258a517e88bSPaolo Bonzini 2591c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 260f95910feSDaniel P. Berrange NULL, NULL, NULL, 2613f472659SMax Reitz &size, &local_error); 262fc19f8a0SPaolo Bonzini if (ret < 0) { 2631ce52846SMax Reitz if (local_error) { 26478288671SMarkus Armbruster error_report_err(local_error); 2651ce52846SMax Reitz } 2660c544d73SPaolo Bonzini goto out_socket; 267a517e88bSPaolo Bonzini } 268a517e88bSPaolo Bonzini 269a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 270fc19f8a0SPaolo Bonzini if (fd < 0) { 271a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 272b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2730c544d73SPaolo Bonzini goto out_socket; 274a6ac2313SPaolo Bonzini } 275a6ac2313SPaolo Bonzini 2761c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 277fc19f8a0SPaolo Bonzini if (ret < 0) { 2780c544d73SPaolo Bonzini goto out_fd; 279a517e88bSPaolo Bonzini } 280a517e88bSPaolo Bonzini 281a517e88bSPaolo Bonzini /* update partition table */ 282a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 283a517e88bSPaolo Bonzini 284c1f8fdc3SPaolo Bonzini if (verbose) { 285a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 286a517e88bSPaolo Bonzini device, srcpath); 287c1f8fdc3SPaolo Bonzini } else { 288c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 289c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 290c1f8fdc3SPaolo Bonzini } 291a517e88bSPaolo Bonzini 292a517e88bSPaolo Bonzini ret = nbd_client(fd); 293a517e88bSPaolo Bonzini if (ret) { 2940c544d73SPaolo Bonzini goto out_fd; 295a517e88bSPaolo Bonzini } 296a517e88bSPaolo Bonzini close(fd); 297d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 298a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 299a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 300a517e88bSPaolo Bonzini 3010c544d73SPaolo Bonzini out_fd: 3020c544d73SPaolo Bonzini close(fd); 3030c544d73SPaolo Bonzini out_socket: 304d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 305a517e88bSPaolo Bonzini out: 306a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 307a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 308cd831bd7Sths } 309cd831bd7Sths 310e4afbf4fSFam Zheng static int nbd_can_accept(void) 311a61c6782SPaolo Bonzini { 312a61c6782SPaolo Bonzini return nb_fds < shared; 313a61c6782SPaolo Bonzini } 314a61c6782SPaolo Bonzini 3157860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3167860a380SPaolo Bonzini { 3177860a380SPaolo Bonzini assert(state == TERMINATING); 3187860a380SPaolo Bonzini state = TERMINATED; 3197860a380SPaolo Bonzini } 3207860a380SPaolo Bonzini 321d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 322e4afbf4fSFam Zheng 3231743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 324a61c6782SPaolo Bonzini { 325a61c6782SPaolo Bonzini nb_fds--; 3267860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3277860a380SPaolo Bonzini state = TERMINATE; 3287860a380SPaolo Bonzini } 329d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3307860a380SPaolo Bonzini nbd_client_put(client); 331a61c6782SPaolo Bonzini } 332a61c6782SPaolo Bonzini 333d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 334a61c6782SPaolo Bonzini { 335d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 336a61c6782SPaolo Bonzini 337d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 338d0d6ff58SDaniel P. Berrange NULL); 339d0d6ff58SDaniel P. Berrange if (!cioc) { 340d0d6ff58SDaniel P. Berrange return TRUE; 3410c544d73SPaolo Bonzini } 3420c544d73SPaolo Bonzini 3437860a380SPaolo Bonzini if (state >= TERMINATE) { 344d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 345d0d6ff58SDaniel P. Berrange return TRUE; 3467860a380SPaolo Bonzini } 3477860a380SPaolo Bonzini 348a61c6782SPaolo Bonzini nb_fds++; 349d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 350f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 351145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 352d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 353a61c6782SPaolo Bonzini 354d0d6ff58SDaniel P. Berrange return TRUE; 355d0d6ff58SDaniel P. Berrange } 356d0d6ff58SDaniel P. Berrange 357d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 358e4afbf4fSFam Zheng { 359e4afbf4fSFam Zheng if (nbd_can_accept()) { 360d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 361d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 362d0d6ff58SDaniel P. Berrange G_IO_IN, 363d0d6ff58SDaniel P. Berrange nbd_accept, 364d0d6ff58SDaniel P. Berrange NULL, NULL); 365d0d6ff58SDaniel P. Berrange } 366e4afbf4fSFam Zheng } else { 367d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 368d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 369d0d6ff58SDaniel P. Berrange server_watch = -1; 370d0d6ff58SDaniel P. Berrange } 371e4afbf4fSFam Zheng } 372e4afbf4fSFam Zheng } 373e4afbf4fSFam Zheng 37448bec07eSDaniel P. Berrange 37548bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 37648bec07eSDaniel P. Berrange const char *bindto, 37748bec07eSDaniel P. Berrange const char *port) 37848bec07eSDaniel P. Berrange { 37948bec07eSDaniel P. Berrange SocketAddress *saddr; 38048bec07eSDaniel P. Berrange 38148bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 38248bec07eSDaniel P. Berrange if (sockpath) { 3832d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 38432bafa8fSEric Blake saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 38532bafa8fSEric Blake saddr->u.q_unix.data->path = g_strdup(sockpath); 38648bec07eSDaniel P. Berrange } else { 3870399293eSEric Blake InetSocketAddress *inet; 3882d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 38932bafa8fSEric Blake inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); 3900399293eSEric Blake inet->host = g_strdup(bindto); 39148bec07eSDaniel P. Berrange if (port) { 3920399293eSEric Blake inet->port = g_strdup(port); 39348bec07eSDaniel P. Berrange } else { 3940399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39548bec07eSDaniel P. Berrange } 39648bec07eSDaniel P. Berrange } 39748bec07eSDaniel P. Berrange 39848bec07eSDaniel P. Berrange return saddr; 39948bec07eSDaniel P. Berrange } 40048bec07eSDaniel P. Berrange 40148bec07eSDaniel P. Berrange 40277c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40377c9aaefSDaniel P. Berrange .name = "file", 40477c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40577c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40677c9aaefSDaniel P. Berrange .desc = { 40777c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40877c9aaefSDaniel P. Berrange { /* end of list */ } 40977c9aaefSDaniel P. Berrange }, 41077c9aaefSDaniel P. Berrange }; 41177c9aaefSDaniel P. Berrange 4120ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4130ab3b337SDaniel P. Berrange .name = "object", 4140ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4150ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4160ab3b337SDaniel P. Berrange .desc = { 4170ab3b337SDaniel P. Berrange { } 4180ab3b337SDaniel P. Berrange }, 4190ab3b337SDaniel P. Berrange }; 4200ab3b337SDaniel P. Berrange 4210ab3b337SDaniel P. Berrange 422145614a1SDaniel P. Berrange 423145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 424145614a1SDaniel P. Berrange { 425145614a1SDaniel P. Berrange Object *obj; 426145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 427145614a1SDaniel P. Berrange 428145614a1SDaniel P. Berrange obj = object_resolve_path_component( 429145614a1SDaniel P. Berrange object_get_objects_root(), id); 430145614a1SDaniel P. Berrange if (!obj) { 431145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 432145614a1SDaniel P. Berrange id); 433145614a1SDaniel P. Berrange return NULL; 434145614a1SDaniel P. Berrange } 435145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 436145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 437145614a1SDaniel P. Berrange if (!creds) { 438145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 439145614a1SDaniel P. Berrange id); 440145614a1SDaniel P. Berrange return NULL; 441145614a1SDaniel P. Berrange } 442145614a1SDaniel P. Berrange 443145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 444145614a1SDaniel P. Berrange error_setg(errp, 445145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 446145614a1SDaniel P. Berrange return NULL; 447145614a1SDaniel P. Berrange } 448145614a1SDaniel P. Berrange object_ref(obj); 449145614a1SDaniel P. Berrange return creds; 450145614a1SDaniel P. Berrange } 451145614a1SDaniel P. Berrange 452145614a1SDaniel P. Berrange 4537a5ca864Sbellard int main(int argc, char **argv) 4547a5ca864Sbellard { 45526f54e9aSMarkus Armbruster BlockBackend *blk; 4567a5ca864Sbellard BlockDriverState *bs; 4577a5ca864Sbellard off_t dev_offset = 0; 458b90fb4b8SPaolo Bonzini uint32_t nbdflags = 0; 459cd831bd7Sths bool disconnect = false; 4607a5ca864Sbellard const char *bindto = "0.0.0.0"; 46148bec07eSDaniel P. Berrange const char *port = NULL; 46248bec07eSDaniel P. Berrange char *sockpath = NULL; 463a6ac2313SPaolo Bonzini char *device = NULL; 4647a5ca864Sbellard off_t fd_size; 4658c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4668c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 4673d4b2f9cSDaniel P. Berrange const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:"; 4687a5ca864Sbellard struct option lopt[] = { 469aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 470aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 471aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 472aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 473aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 474aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 475aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 476aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 477aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 478aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 479aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 480aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 481aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 482aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 483aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 484aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 485aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 486aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 487aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 488aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 489aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 490aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 491aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 492aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 493aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 494aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 495660f11beSBlue Swirl { NULL, 0, NULL, 0 } 4967a5ca864Sbellard }; 4977a5ca864Sbellard int ch; 4987a5ca864Sbellard int opt_ind = 0; 4997a5ca864Sbellard char *end; 500f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5017a5ca864Sbellard int partition = -1; 5024fbec260SMax Reitz int ret = 0; 50339a5235cSPaolo Bonzini bool seen_cache = false; 504ded9d2d5SPaolo Bonzini bool seen_discard = false; 50539a5235cSPaolo Bonzini bool seen_aio = false; 506a517e88bSPaolo Bonzini pthread_t client_thread; 507e6b63677SDaniel P. Berrange const char *fmt = NULL; 50834b5d2c6SMax Reitz Error *local_err = NULL; 509b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5104fbec260SMax Reitz QDict *options = NULL; 5113d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 512145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 51377c9aaefSDaniel P. Berrange bool imageOpts = false; 5146effd5bfSKevin Wolf bool writethrough = true; 5157a5ca864Sbellard 516a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 517a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 518a517e88bSPaolo Bonzini */ 519bb345110SPaolo Bonzini struct sigaction sa_sigterm; 520bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 521bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 522bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 523*c2297088SDaniel P. Berrange 524*c2297088SDaniel P. Berrange if (qcrypto_init(&local_err) < 0) { 525*c2297088SDaniel P. Berrange error_reportf_err(local_err, "cannot initialize crypto: "); 526*c2297088SDaniel P. Berrange exit(1); 527*c2297088SDaniel P. Berrange } 528*c2297088SDaniel P. Berrange 5290ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5300ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 53110f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 532bb345110SPaolo Bonzini 5337a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5347a5ca864Sbellard switch (ch) { 5357a5ca864Sbellard case 's': 5362f726488Sths flags |= BDRV_O_SNAPSHOT; 5372f726488Sths break; 5382f726488Sths case 'n': 53939a5235cSPaolo Bonzini optarg = (char *) "none"; 54039a5235cSPaolo Bonzini /* fallthrough */ 54139a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 54239a5235cSPaolo Bonzini if (seen_cache) { 54385b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 54485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 54539a5235cSPaolo Bonzini } 54639a5235cSPaolo Bonzini seen_cache = true; 5476effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 54885b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 54985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55039a5235cSPaolo Bonzini } 5517a5ca864Sbellard break; 55239a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 55339a5235cSPaolo Bonzini if (seen_aio) { 55485b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 55585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55639a5235cSPaolo Bonzini } 55739a5235cSPaolo Bonzini seen_aio = true; 55839a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 55939a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 56039a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 56139a5235cSPaolo Bonzini /* this is the default */ 56239a5235cSPaolo Bonzini } else { 56385b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 56485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 56539a5235cSPaolo Bonzini } 56639a5235cSPaolo Bonzini break; 567ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 568ded9d2d5SPaolo Bonzini if (seen_discard) { 56985b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 57085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 571ded9d2d5SPaolo Bonzini } 572ded9d2d5SPaolo Bonzini seen_discard = true; 573ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 57485b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 57585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 576ded9d2d5SPaolo Bonzini } 577ded9d2d5SPaolo Bonzini break; 578b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 579b3838a40SPeter Lieven detect_zeroes = 580b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 581b3838a40SPeter Lieven optarg, 5827fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 583b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 584b3838a40SPeter Lieven &local_err); 585b3838a40SPeter Lieven if (local_err) { 586c29b77f9SMarkus Armbruster error_reportf_err(local_err, 587c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 58885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 589b3838a40SPeter Lieven } 590b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 591b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 59285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 593b3838a40SPeter Lieven "without setting discard operation to unmap"); 59485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 595b3838a40SPeter Lieven } 596b3838a40SPeter Lieven break; 5977a5ca864Sbellard case 'b': 5987a5ca864Sbellard bindto = optarg; 5997a5ca864Sbellard break; 6007a5ca864Sbellard case 'p': 60148bec07eSDaniel P. Berrange port = optarg; 6027a5ca864Sbellard break; 6037a5ca864Sbellard case 'o': 6047a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6057a5ca864Sbellard if (*end) { 60685b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 60785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6087a5ca864Sbellard } 6097a5ca864Sbellard if (dev_offset < 0) { 61085b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 61185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6127a5ca864Sbellard } 6137a5ca864Sbellard break; 6148c116b0eSWenchao Xia case 'l': 6158c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 61670b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 61770b94331SMarkus Armbruster optarg, false); 6188c116b0eSWenchao Xia if (!sn_opts) { 61985b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6208c116b0eSWenchao Xia optarg); 62185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6228c116b0eSWenchao Xia } 6238c116b0eSWenchao Xia } else { 6248c116b0eSWenchao Xia sn_id_or_name = optarg; 6258c116b0eSWenchao Xia } 6268c116b0eSWenchao Xia /* fall through */ 6277a5ca864Sbellard case 'r': 628b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 62907108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6307a5ca864Sbellard break; 6317a5ca864Sbellard case 'P': 6327a5ca864Sbellard partition = strtol(optarg, &end, 0); 633713cc671SPeter Lieven if (*end) { 63485b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 63585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 636713cc671SPeter Lieven } 637713cc671SPeter Lieven if (partition < 1 || partition > 8) { 63885b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 63985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 640713cc671SPeter Lieven } 6417a5ca864Sbellard break; 642cd831bd7Sths case 'k': 643b32f6c28SPaolo Bonzini sockpath = optarg; 644713cc671SPeter Lieven if (sockpath[0] != '/') { 6459af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 64685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 647713cc671SPeter Lieven } 648cd831bd7Sths break; 649cd831bd7Sths case 'd': 650cd831bd7Sths disconnect = true; 651cd831bd7Sths break; 652cd831bd7Sths case 'c': 653cd831bd7Sths device = optarg; 654cd831bd7Sths break; 6553b05a8e9Sths case 'e': 6563b05a8e9Sths shared = strtol(optarg, &end, 0); 6573b05a8e9Sths if (*end) { 65885b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 65985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6603b05a8e9Sths } 6613b05a8e9Sths if (shared < 1) { 6629af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 66385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6643b05a8e9Sths } 6653b05a8e9Sths break; 666e6b63677SDaniel P. Berrange case 'f': 667e6b63677SDaniel P. Berrange fmt = optarg; 668e6b63677SDaniel P. Berrange break; 66975818250Sths case 't': 67075818250Sths persistent = 1; 67175818250Sths break; 6723d4b2f9cSDaniel P. Berrange case 'x': 6733d4b2f9cSDaniel P. Berrange export_name = optarg; 6743d4b2f9cSDaniel P. Berrange break; 6757a5ca864Sbellard case 'v': 6767a5ca864Sbellard verbose = 1; 6777a5ca864Sbellard break; 6787a5ca864Sbellard case 'V': 6797a5ca864Sbellard version(argv[0]); 6807a5ca864Sbellard exit(0); 6817a5ca864Sbellard break; 6827a5ca864Sbellard case 'h': 6837a5ca864Sbellard usage(argv[0]); 6847a5ca864Sbellard exit(0); 6857a5ca864Sbellard break; 6867a5ca864Sbellard case '?': 68785b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 68885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6890ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 6900ab3b337SDaniel P. Berrange QemuOpts *opts; 6910ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 6920ab3b337SDaniel P. Berrange optarg, true); 6930ab3b337SDaniel P. Berrange if (!opts) { 6940ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 6950ab3b337SDaniel P. Berrange } 6960ab3b337SDaniel P. Berrange } break; 697145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 698145614a1SDaniel P. Berrange tlscredsid = optarg; 699145614a1SDaniel P. Berrange break; 70077c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 70177c9aaefSDaniel P. Berrange imageOpts = true; 70277c9aaefSDaniel P. Berrange break; 7037a5ca864Sbellard } 7047a5ca864Sbellard } 7057a5ca864Sbellard 7067a5ca864Sbellard if ((argc - optind) != 1) { 707433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 708433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 70985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7107a5ca864Sbellard } 7117a5ca864Sbellard 7120ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7130ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 7140ab3b337SDaniel P. Berrange NULL, &local_err)) { 7150ab3b337SDaniel P. Berrange error_report_err(local_err); 7160ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7170ab3b337SDaniel P. Berrange } 7180ab3b337SDaniel P. Berrange 719145614a1SDaniel P. Berrange if (tlscredsid) { 720145614a1SDaniel P. Berrange if (sockpath) { 721145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 722145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 723145614a1SDaniel P. Berrange } 724145614a1SDaniel P. Berrange if (device) { 725145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 726145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 727145614a1SDaniel P. Berrange } 728145614a1SDaniel P. Berrange if (!export_name) { 729145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 730145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 731145614a1SDaniel P. Berrange export_name = ""; 732145614a1SDaniel P. Berrange } 733145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 734145614a1SDaniel P. Berrange if (local_err) { 735145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 736145614a1SDaniel P. Berrange error_get_pretty(local_err)); 737145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 738145614a1SDaniel P. Berrange } 739145614a1SDaniel P. Berrange } 740145614a1SDaniel P. Berrange 741cd831bd7Sths if (disconnect) { 742d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 743d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 74485b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 74585b01e09SMarkus Armbruster strerror(errno)); 74685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 747fc19f8a0SPaolo Bonzini } 748d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 749cd831bd7Sths 750d0d6ff58SDaniel P. Berrange close(nbdfd); 751cd831bd7Sths 752cd831bd7Sths printf("%s disconnected\n", argv[optind]); 753cd831bd7Sths 754cd831bd7Sths return 0; 755cd831bd7Sths } 756cd831bd7Sths 757c1f8fdc3SPaolo Bonzini if (device && !verbose) { 758c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 759c1f8fdc3SPaolo Bonzini pid_t pid; 760c1f8fdc3SPaolo Bonzini int ret; 761c1f8fdc3SPaolo Bonzini 762fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 76385b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 76485b01e09SMarkus Armbruster strerror(errno)); 76585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 766c1f8fdc3SPaolo Bonzini } 767c1f8fdc3SPaolo Bonzini 768c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 769c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 770c1f8fdc3SPaolo Bonzini */ 771c1f8fdc3SPaolo Bonzini pid = fork(); 77270d4739eSMax Reitz if (pid < 0) { 77385b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 77485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 77570d4739eSMax Reitz } else if (pid == 0) { 776c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 7779faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 778c1f8fdc3SPaolo Bonzini 779c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 780c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 781fc19f8a0SPaolo Bonzini if (ret < 0) { 78285b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 78385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 784c1f8fdc3SPaolo Bonzini } 785c1f8fdc3SPaolo Bonzini 786c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 787c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 788c1f8fdc3SPaolo Bonzini } else { 789c1f8fdc3SPaolo Bonzini bool errors = false; 790c1f8fdc3SPaolo Bonzini char *buf; 791c1f8fdc3SPaolo Bonzini 792c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 793c1f8fdc3SPaolo Bonzini * it closes the pipe. 794c1f8fdc3SPaolo Bonzini */ 795c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 796c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 797c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 798c1f8fdc3SPaolo Bonzini errors = true; 799c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 800fc19f8a0SPaolo Bonzini if (ret < 0) { 801c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 802c1f8fdc3SPaolo Bonzini } 803c1f8fdc3SPaolo Bonzini } 804fc19f8a0SPaolo Bonzini if (ret < 0) { 80585b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 80685b01e09SMarkus Armbruster strerror(errno)); 80785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 808c1f8fdc3SPaolo Bonzini } 809c1f8fdc3SPaolo Bonzini 810c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 811c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 812c1f8fdc3SPaolo Bonzini */ 813c1f8fdc3SPaolo Bonzini exit(errors); 814c1f8fdc3SPaolo Bonzini } 815c1f8fdc3SPaolo Bonzini } 816c1f8fdc3SPaolo Bonzini 817a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 818b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 819b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 820cd831bd7Sths } 821cd831bd7Sths 82248bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 82348bec07eSDaniel P. Berrange 8242f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 825565f65d2SMarkus Armbruster error_report_err(local_err); 8262f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8272f78e491SChrysostomos Nanakos } 828802ddc37SPaolo Bonzini bdrv_init(); 829802ddc37SPaolo Bonzini atexit(bdrv_close_all); 830802ddc37SPaolo Bonzini 83177c9aaefSDaniel P. Berrange srcpath = argv[optind]; 83277c9aaefSDaniel P. Berrange if (imageOpts) { 83377c9aaefSDaniel P. Berrange QemuOpts *opts; 83477c9aaefSDaniel P. Berrange if (fmt) { 83577c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 83677c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 83777c9aaefSDaniel P. Berrange } 83877c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 83977c9aaefSDaniel P. Berrange if (!opts) { 84077c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 84177c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 84277c9aaefSDaniel P. Berrange } 84377c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 84477c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 845efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 84677c9aaefSDaniel P. Berrange } else { 847e6b63677SDaniel P. Berrange if (fmt) { 8484fbec260SMax Reitz options = qdict_new(); 8494fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 850e6b63677SDaniel P. Berrange } 851efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 85277c9aaefSDaniel P. Berrange } 85377c9aaefSDaniel P. Berrange 8544fbec260SMax Reitz if (!blk) { 855c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 856c29b77f9SMarkus Armbruster argv[optind]); 85785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 858802ddc37SPaolo Bonzini } 8594fbec260SMax Reitz bs = blk_bs(blk); 860802ddc37SPaolo Bonzini 8616effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 8626effd5bfSKevin Wolf 8638c116b0eSWenchao Xia if (sn_opts) { 8648c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 8658c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 8668c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 8678c116b0eSWenchao Xia &local_err); 8688c116b0eSWenchao Xia } else if (sn_id_or_name) { 8698c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 8708c116b0eSWenchao Xia &local_err); 8718c116b0eSWenchao Xia } 8728c116b0eSWenchao Xia if (ret < 0) { 873c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 87485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8758c116b0eSWenchao Xia } 8768c116b0eSWenchao Xia 877b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 8784c58e80aSMax Reitz fd_size = blk_getlength(blk); 87998f44bbeSMax Reitz if (fd_size < 0) { 88085b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 88198f44bbeSMax Reitz strerror(-fd_size)); 88285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 88398f44bbeSMax Reitz } 884802ddc37SPaolo Bonzini 885185b4338SPaolo Bonzini if (partition != -1) { 8864c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 887185b4338SPaolo Bonzini if (ret < 0) { 88885b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 889a4699e55SMarkus Armbruster strerror(-ret)); 89085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 891802ddc37SPaolo Bonzini } 892185b4338SPaolo Bonzini } 893802ddc37SPaolo Bonzini 89498f44bbeSMax Reitz exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, 89598f44bbeSMax Reitz &local_err); 89698f44bbeSMax Reitz if (!exp) { 8974fffeb5eSMarkus Armbruster error_report_err(local_err); 89885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 89998f44bbeSMax Reitz } 9003d4b2f9cSDaniel P. Berrange if (export_name) { 9013d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 9023d4b2f9cSDaniel P. Berrange newproto = true; 9033d4b2f9cSDaniel P. Berrange } 9043b05a8e9Sths 905d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 906d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 907d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 90848bec07eSDaniel P. Berrange error_report_err(local_err); 9097a5ca864Sbellard return 1; 910a61c6782SPaolo Bonzini } 911f1ef5555SPaolo Bonzini 912f1ef5555SPaolo Bonzini if (device) { 913f1ef5555SPaolo Bonzini int ret; 914f1ef5555SPaolo Bonzini 915a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 916f1ef5555SPaolo Bonzini if (ret != 0) { 91785b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 91885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 919f1ef5555SPaolo Bonzini } 920f1ef5555SPaolo Bonzini } else { 921f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 922f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 923f1ef5555SPaolo Bonzini } 924f1ef5555SPaolo Bonzini 925d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9267a5ca864Sbellard 9279faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9289faf31b6SMichael Tokarev * to free any busy filesystems */ 9299faf31b6SMichael Tokarev if (chdir("/") < 0) { 93085b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 93185b01e09SMarkus Armbruster strerror(errno)); 93285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9339faf31b6SMichael Tokarev } 9349faf31b6SMichael Tokarev 9357860a380SPaolo Bonzini state = RUNNING; 9363b05a8e9Sths do { 937a61c6782SPaolo Bonzini main_loop_wait(false); 9387860a380SPaolo Bonzini if (state == TERMINATE) { 9397860a380SPaolo Bonzini state = TERMINATING; 940af49bbbeSPaolo Bonzini nbd_export_close(exp); 9412c8d9f06SPaolo Bonzini nbd_export_put(exp); 9427860a380SPaolo Bonzini exp = NULL; 9437860a380SPaolo Bonzini } 9447860a380SPaolo Bonzini } while (state != TERMINATED); 9452c8d9f06SPaolo Bonzini 94626f54e9aSMarkus Armbruster blk_unref(blk); 947b32f6c28SPaolo Bonzini if (sockpath) { 948b32f6c28SPaolo Bonzini unlink(sockpath); 949b32f6c28SPaolo Bonzini } 9507a5ca864Sbellard 9518c116b0eSWenchao Xia qemu_opts_del(sn_opts); 9528c116b0eSWenchao Xia 953a517e88bSPaolo Bonzini if (device) { 954a517e88bSPaolo Bonzini void *ret; 955a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 956a517e88bSPaolo Bonzini exit(ret != NULL); 957a517e88bSPaolo Bonzini } else { 958a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 959a517e88bSPaolo Bonzini } 9607a5ca864Sbellard } 961