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" 205a61cb60SStefan Weil #include "qemu-common.h" 2126f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 22b3838a40SPeter Lieven #include "block/block_int.h" 23737e150eSPaolo Bonzini #include "block/nbd.h" 246a1751b7SAlex Bligh #include "qemu/main-loop.h" 25537b41f5SPaolo Bonzini #include "qemu/error-report.h" 260ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 278c116b0eSWenchao Xia #include "block/snapshot.h" 28b3838a40SPeter Lieven #include "qapi/util.h" 29d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 300ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 31d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 327a5ca864Sbellard 337a5ca864Sbellard #include <getopt.h> 342bff4b6fSBlue Swirl #include <libgen.h> 35a517e88bSPaolo Bonzini #include <pthread.h> 36cd831bd7Sths 37cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 38fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 39fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 40fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 41fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 42fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 43fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 44fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 457a5ca864Sbellard 46af49bbbeSPaolo Bonzini static NBDExport *exp; 473d4b2f9cSDaniel P. Berrange static bool newproto; 48b1d8e52eSblueswir1 static int verbose; 49a517e88bSPaolo Bonzini static char *srcpath; 5048bec07eSDaniel P. Berrange static SocketAddress *saddr; 517860a380SPaolo Bonzini static int persistent = 0; 527860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 53a61c6782SPaolo Bonzini static int shared = 1; 54a61c6782SPaolo Bonzini static int nb_fds; 55d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 56d0d6ff58SDaniel P. Berrange static int server_watch = -1; 57145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 587a5ca864Sbellard 597a5ca864Sbellard static void usage(const char *name) 607a5ca864Sbellard { 61b033cd86SPaolo Bonzini (printf) ( 627a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 637a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 647a5ca864Sbellard "\n" 657a5ca864Sbellard " -h, --help display this help and exit\n" 667a5ca864Sbellard " -V, --version output version information and exit\n" 677a5ca864Sbellard "\n" 68b033cd86SPaolo Bonzini "Connection properties:\n" 69b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 70b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 71b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 72b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 73b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 74b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 75b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 76b033cd86SPaolo Bonzini "\n" 77b033cd86SPaolo Bonzini "Exposing part of the image:\n" 78b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 79b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 80b033cd86SPaolo Bonzini "\n" 810ab3b337SDaniel P. Berrange "General purpose options:\n" 820ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 830ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 84b033cd86SPaolo Bonzini #ifdef __linux__ 85b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 86b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 87b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 88b033cd86SPaolo Bonzini "\n" 89b033cd86SPaolo Bonzini #endif 90b033cd86SPaolo Bonzini "\n" 91b033cd86SPaolo Bonzini "Block device options:\n" 924323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 93b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 948c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 958c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 968c116b0eSWenchao Xia " the temporary one\n" 978c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 988c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 998c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1008c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1018c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 102b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 10339a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 10439a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 105b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1066883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 10777c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 108b033cd86SPaolo Bonzini "\n" 109b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 110c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1117a5ca864Sbellard } 1127a5ca864Sbellard 1137a5ca864Sbellard static void version(const char *name) 1147a5ca864Sbellard { 1157a5ca864Sbellard printf( 116315bc7aaSths "%s version 0.0.1\n" 1177a5ca864Sbellard "Written by Anthony Liguori.\n" 1187a5ca864Sbellard "\n" 1197a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1207a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1217a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 122315bc7aaSths , name); 1237a5ca864Sbellard } 1247a5ca864Sbellard 1257a5ca864Sbellard struct partition_record 1267a5ca864Sbellard { 1277a5ca864Sbellard uint8_t bootable; 1287a5ca864Sbellard uint8_t start_head; 1297a5ca864Sbellard uint32_t start_cylinder; 1307a5ca864Sbellard uint8_t start_sector; 1317a5ca864Sbellard uint8_t system; 1327a5ca864Sbellard uint8_t end_head; 1337a5ca864Sbellard uint8_t end_cylinder; 1347a5ca864Sbellard uint8_t end_sector; 1357a5ca864Sbellard uint32_t start_sector_abs; 1367a5ca864Sbellard uint32_t nb_sectors_abs; 1377a5ca864Sbellard }; 1387a5ca864Sbellard 1397a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1407a5ca864Sbellard { 1417a5ca864Sbellard r->bootable = p[0]; 1427a5ca864Sbellard r->start_head = p[1]; 1437a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1447a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1457a5ca864Sbellard r->system = p[4]; 1467a5ca864Sbellard r->end_head = p[5]; 1477a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1487a5ca864Sbellard r->end_sector = p[6] & 0x3f; 149ac97393dSMax Reitz 150ac97393dSMax Reitz r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); 151ac97393dSMax Reitz r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); 1527a5ca864Sbellard } 1537a5ca864Sbellard 1544c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1557a5ca864Sbellard off_t *offset, off_t *size) 1567a5ca864Sbellard { 1577a5ca864Sbellard struct partition_record mbr[4]; 1587a5ca864Sbellard uint8_t data[512]; 1597a5ca864Sbellard int i; 1607a5ca864Sbellard int ext_partnum = 4; 161cb7cf0e3SRyota Ozaki int ret; 1627a5ca864Sbellard 1634c58e80aSMax Reitz if ((ret = blk_read(blk, 0, data, 1)) < 0) { 164a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 16585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 166cb7cf0e3SRyota Ozaki } 1677a5ca864Sbellard 1687a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 169185b4338SPaolo Bonzini return -EINVAL; 1707a5ca864Sbellard } 1717a5ca864Sbellard 1727a5ca864Sbellard for (i = 0; i < 4; i++) { 1737a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1747a5ca864Sbellard 175453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1767a5ca864Sbellard continue; 177453b07b1SMax Reitz } 1787a5ca864Sbellard 1797a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1807a5ca864Sbellard struct partition_record ext[4]; 1817a5ca864Sbellard uint8_t data1[512]; 1827a5ca864Sbellard int j; 1837a5ca864Sbellard 1844c58e80aSMax Reitz if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) { 185a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 187cb7cf0e3SRyota Ozaki } 1887a5ca864Sbellard 1897a5ca864Sbellard for (j = 0; j < 4; j++) { 1907a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 191453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 1927a5ca864Sbellard continue; 193453b07b1SMax Reitz } 1947a5ca864Sbellard 1957a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 1967a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 1977a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 1987a5ca864Sbellard return 0; 1997a5ca864Sbellard } 2007a5ca864Sbellard } 2017a5ca864Sbellard ext_partnum += 4; 2027a5ca864Sbellard } else if ((i + 1) == partition) { 2037a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2047a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2057a5ca864Sbellard return 0; 2067a5ca864Sbellard } 2077a5ca864Sbellard } 2087a5ca864Sbellard 209185b4338SPaolo Bonzini return -ENOENT; 2107a5ca864Sbellard } 2117a5ca864Sbellard 212bb345110SPaolo Bonzini static void termsig_handler(int signum) 213bb345110SPaolo Bonzini { 2147860a380SPaolo Bonzini state = TERMINATE; 215a61c6782SPaolo Bonzini qemu_notify_event(); 216bb345110SPaolo Bonzini } 217bb345110SPaolo Bonzini 218537b41f5SPaolo Bonzini 219a517e88bSPaolo Bonzini static void *show_parts(void *arg) 220cd831bd7Sths { 221a6ac2313SPaolo Bonzini char *device = arg; 222cd831bd7Sths int nbd; 223cd831bd7Sths 224cd831bd7Sths /* linux just needs an open() to trigger 225cd831bd7Sths * the partition table update 226cd831bd7Sths * but remember to load the module with max_part != 0 : 227cd831bd7Sths * modprobe nbd max_part=63 228cd831bd7Sths */ 229cd831bd7Sths nbd = open(device, O_RDWR); 230fc19f8a0SPaolo Bonzini if (nbd >= 0) { 231cd831bd7Sths close(nbd); 232cd831bd7Sths } 233a517e88bSPaolo Bonzini return NULL; 234a517e88bSPaolo Bonzini } 235a517e88bSPaolo Bonzini 236a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 237a517e88bSPaolo Bonzini { 238a6ac2313SPaolo Bonzini char *device = arg; 239a517e88bSPaolo Bonzini off_t size; 240a517e88bSPaolo Bonzini uint32_t nbdflags; 241d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 242d0d6ff58SDaniel P. Berrange int fd; 243a517e88bSPaolo Bonzini int ret; 244a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2451ce52846SMax Reitz Error *local_error = NULL; 246a517e88bSPaolo Bonzini 247d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 248d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 249d0d6ff58SDaniel P. Berrange saddr, 250d0d6ff58SDaniel P. Berrange &local_error) < 0) { 25148bec07eSDaniel P. Berrange error_report_err(local_error); 252a517e88bSPaolo Bonzini goto out; 253a517e88bSPaolo Bonzini } 254a517e88bSPaolo Bonzini 2551c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 256f95910feSDaniel P. Berrange NULL, NULL, NULL, 2573f472659SMax Reitz &size, &local_error); 258fc19f8a0SPaolo Bonzini if (ret < 0) { 2591ce52846SMax Reitz if (local_error) { 26078288671SMarkus Armbruster error_report_err(local_error); 2611ce52846SMax Reitz } 2620c544d73SPaolo Bonzini goto out_socket; 263a517e88bSPaolo Bonzini } 264a517e88bSPaolo Bonzini 265a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 266fc19f8a0SPaolo Bonzini if (fd < 0) { 267a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 268b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2690c544d73SPaolo Bonzini goto out_socket; 270a6ac2313SPaolo Bonzini } 271a6ac2313SPaolo Bonzini 2721c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 273fc19f8a0SPaolo Bonzini if (ret < 0) { 2740c544d73SPaolo Bonzini goto out_fd; 275a517e88bSPaolo Bonzini } 276a517e88bSPaolo Bonzini 277a517e88bSPaolo Bonzini /* update partition table */ 278a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 279a517e88bSPaolo Bonzini 280c1f8fdc3SPaolo Bonzini if (verbose) { 281a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 282a517e88bSPaolo Bonzini device, srcpath); 283c1f8fdc3SPaolo Bonzini } else { 284c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 285c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 286c1f8fdc3SPaolo Bonzini } 287a517e88bSPaolo Bonzini 288a517e88bSPaolo Bonzini ret = nbd_client(fd); 289a517e88bSPaolo Bonzini if (ret) { 2900c544d73SPaolo Bonzini goto out_fd; 291a517e88bSPaolo Bonzini } 292a517e88bSPaolo Bonzini close(fd); 293d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 294a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 295a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 296a517e88bSPaolo Bonzini 2970c544d73SPaolo Bonzini out_fd: 2980c544d73SPaolo Bonzini close(fd); 2990c544d73SPaolo Bonzini out_socket: 300d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 301a517e88bSPaolo Bonzini out: 302a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 303a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 304cd831bd7Sths } 305cd831bd7Sths 306e4afbf4fSFam Zheng static int nbd_can_accept(void) 307a61c6782SPaolo Bonzini { 308a61c6782SPaolo Bonzini return nb_fds < shared; 309a61c6782SPaolo Bonzini } 310a61c6782SPaolo Bonzini 3117860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3127860a380SPaolo Bonzini { 3137860a380SPaolo Bonzini assert(state == TERMINATING); 3147860a380SPaolo Bonzini state = TERMINATED; 3157860a380SPaolo Bonzini } 3167860a380SPaolo Bonzini 317d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 318e4afbf4fSFam Zheng 3191743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 320a61c6782SPaolo Bonzini { 321a61c6782SPaolo Bonzini nb_fds--; 3227860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3237860a380SPaolo Bonzini state = TERMINATE; 3247860a380SPaolo Bonzini } 325d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3267860a380SPaolo Bonzini nbd_client_put(client); 327a61c6782SPaolo Bonzini } 328a61c6782SPaolo Bonzini 329d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 330a61c6782SPaolo Bonzini { 331d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 332a61c6782SPaolo Bonzini 333d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 334d0d6ff58SDaniel P. Berrange NULL); 335d0d6ff58SDaniel P. Berrange if (!cioc) { 336d0d6ff58SDaniel P. Berrange return TRUE; 3370c544d73SPaolo Bonzini } 3380c544d73SPaolo Bonzini 3397860a380SPaolo Bonzini if (state >= TERMINATE) { 340d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 341d0d6ff58SDaniel P. Berrange return TRUE; 3427860a380SPaolo Bonzini } 3437860a380SPaolo Bonzini 344a61c6782SPaolo Bonzini nb_fds++; 345d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 346f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 347145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 348d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 349a61c6782SPaolo Bonzini 350d0d6ff58SDaniel P. Berrange return TRUE; 351d0d6ff58SDaniel P. Berrange } 352d0d6ff58SDaniel P. Berrange 353d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 354e4afbf4fSFam Zheng { 355e4afbf4fSFam Zheng if (nbd_can_accept()) { 356d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 357d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 358d0d6ff58SDaniel P. Berrange G_IO_IN, 359d0d6ff58SDaniel P. Berrange nbd_accept, 360d0d6ff58SDaniel P. Berrange NULL, NULL); 361d0d6ff58SDaniel P. Berrange } 362e4afbf4fSFam Zheng } else { 363d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 364d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 365d0d6ff58SDaniel P. Berrange server_watch = -1; 366d0d6ff58SDaniel P. Berrange } 367e4afbf4fSFam Zheng } 368e4afbf4fSFam Zheng } 369e4afbf4fSFam Zheng 37048bec07eSDaniel P. Berrange 37148bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 37248bec07eSDaniel P. Berrange const char *bindto, 37348bec07eSDaniel P. Berrange const char *port) 37448bec07eSDaniel P. Berrange { 37548bec07eSDaniel P. Berrange SocketAddress *saddr; 37648bec07eSDaniel P. Berrange 37748bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 37848bec07eSDaniel P. Berrange if (sockpath) { 3792d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 3802d32addaSEric Blake saddr->u.q_unix = g_new0(UnixSocketAddress, 1); 3812d32addaSEric Blake saddr->u.q_unix->path = g_strdup(sockpath); 38248bec07eSDaniel P. Berrange } else { 383*0399293eSEric Blake InetSocketAddress *inet; 3842d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 385*0399293eSEric Blake inet = saddr->u.inet = g_new0(InetSocketAddress, 1); 386*0399293eSEric Blake inet->host = g_strdup(bindto); 38748bec07eSDaniel P. Berrange if (port) { 388*0399293eSEric Blake inet->port = g_strdup(port); 38948bec07eSDaniel P. Berrange } else { 390*0399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39148bec07eSDaniel P. Berrange } 39248bec07eSDaniel P. Berrange } 39348bec07eSDaniel P. Berrange 39448bec07eSDaniel P. Berrange return saddr; 39548bec07eSDaniel P. Berrange } 39648bec07eSDaniel P. Berrange 39748bec07eSDaniel P. Berrange 39877c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 39977c9aaefSDaniel P. Berrange .name = "file", 40077c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40177c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40277c9aaefSDaniel P. Berrange .desc = { 40377c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40477c9aaefSDaniel P. Berrange { /* end of list */ } 40577c9aaefSDaniel P. Berrange }, 40677c9aaefSDaniel P. Berrange }; 40777c9aaefSDaniel P. Berrange 4080ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4090ab3b337SDaniel P. Berrange .name = "object", 4100ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4110ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4120ab3b337SDaniel P. Berrange .desc = { 4130ab3b337SDaniel P. Berrange { } 4140ab3b337SDaniel P. Berrange }, 4150ab3b337SDaniel P. Berrange }; 4160ab3b337SDaniel P. Berrange 4170ab3b337SDaniel P. Berrange 418145614a1SDaniel P. Berrange 419145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 420145614a1SDaniel P. Berrange { 421145614a1SDaniel P. Berrange Object *obj; 422145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 423145614a1SDaniel P. Berrange 424145614a1SDaniel P. Berrange obj = object_resolve_path_component( 425145614a1SDaniel P. Berrange object_get_objects_root(), id); 426145614a1SDaniel P. Berrange if (!obj) { 427145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 428145614a1SDaniel P. Berrange id); 429145614a1SDaniel P. Berrange return NULL; 430145614a1SDaniel P. Berrange } 431145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 432145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 433145614a1SDaniel P. Berrange if (!creds) { 434145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 435145614a1SDaniel P. Berrange id); 436145614a1SDaniel P. Berrange return NULL; 437145614a1SDaniel P. Berrange } 438145614a1SDaniel P. Berrange 439145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 440145614a1SDaniel P. Berrange error_setg(errp, 441145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 442145614a1SDaniel P. Berrange return NULL; 443145614a1SDaniel P. Berrange } 444145614a1SDaniel P. Berrange object_ref(obj); 445145614a1SDaniel P. Berrange return creds; 446145614a1SDaniel P. Berrange } 447145614a1SDaniel P. Berrange 448145614a1SDaniel P. Berrange 4497a5ca864Sbellard int main(int argc, char **argv) 4507a5ca864Sbellard { 45126f54e9aSMarkus Armbruster BlockBackend *blk; 4527a5ca864Sbellard BlockDriverState *bs; 4537a5ca864Sbellard off_t dev_offset = 0; 454b90fb4b8SPaolo Bonzini uint32_t nbdflags = 0; 455cd831bd7Sths bool disconnect = false; 4567a5ca864Sbellard const char *bindto = "0.0.0.0"; 45748bec07eSDaniel P. Berrange const char *port = NULL; 45848bec07eSDaniel P. Berrange char *sockpath = NULL; 459a6ac2313SPaolo Bonzini char *device = NULL; 4607a5ca864Sbellard off_t fd_size; 4618c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4628c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 4633d4b2f9cSDaniel P. Berrange const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:"; 4647a5ca864Sbellard struct option lopt[] = { 465aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 466aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 467aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 468aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 469aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 470aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 471aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 472aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 473aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 474aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 475aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 476aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 477aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 478aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 479aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 480aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 481aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 482aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 483aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 484aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 485aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 486aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 487aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 488aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 489aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 490aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 491660f11beSBlue Swirl { NULL, 0, NULL, 0 } 4927a5ca864Sbellard }; 4937a5ca864Sbellard int ch; 4947a5ca864Sbellard int opt_ind = 0; 4957a5ca864Sbellard char *end; 496f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 4977a5ca864Sbellard int partition = -1; 4984fbec260SMax Reitz int ret = 0; 49939a5235cSPaolo Bonzini bool seen_cache = false; 500ded9d2d5SPaolo Bonzini bool seen_discard = false; 50139a5235cSPaolo Bonzini bool seen_aio = false; 502a517e88bSPaolo Bonzini pthread_t client_thread; 503e6b63677SDaniel P. Berrange const char *fmt = NULL; 50434b5d2c6SMax Reitz Error *local_err = NULL; 505b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5064fbec260SMax Reitz QDict *options = NULL; 5073d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 508145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 50977c9aaefSDaniel P. Berrange bool imageOpts = false; 5107a5ca864Sbellard 511a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 512a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 513a517e88bSPaolo Bonzini */ 514bb345110SPaolo Bonzini struct sigaction sa_sigterm; 515bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 516bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 517bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 5180ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5190ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 52010f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 521bb345110SPaolo Bonzini 5227a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5237a5ca864Sbellard switch (ch) { 5247a5ca864Sbellard case 's': 5252f726488Sths flags |= BDRV_O_SNAPSHOT; 5262f726488Sths break; 5272f726488Sths case 'n': 52839a5235cSPaolo Bonzini optarg = (char *) "none"; 52939a5235cSPaolo Bonzini /* fallthrough */ 53039a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 53139a5235cSPaolo Bonzini if (seen_cache) { 53285b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 53385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 53439a5235cSPaolo Bonzini } 53539a5235cSPaolo Bonzini seen_cache = true; 53639a5235cSPaolo Bonzini if (bdrv_parse_cache_flags(optarg, &flags) == -1) { 53785b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 53885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 53939a5235cSPaolo Bonzini } 5407a5ca864Sbellard break; 54139a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 54239a5235cSPaolo Bonzini if (seen_aio) { 54385b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 54485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 54539a5235cSPaolo Bonzini } 54639a5235cSPaolo Bonzini seen_aio = true; 54739a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 54839a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 54939a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 55039a5235cSPaolo Bonzini /* this is the default */ 55139a5235cSPaolo Bonzini } else { 55285b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 55385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55439a5235cSPaolo Bonzini } 55539a5235cSPaolo Bonzini break; 556ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 557ded9d2d5SPaolo Bonzini if (seen_discard) { 55885b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 55985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 560ded9d2d5SPaolo Bonzini } 561ded9d2d5SPaolo Bonzini seen_discard = true; 562ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 56385b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 56485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 565ded9d2d5SPaolo Bonzini } 566ded9d2d5SPaolo Bonzini break; 567b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 568b3838a40SPeter Lieven detect_zeroes = 569b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 570b3838a40SPeter Lieven optarg, 5717fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 572b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 573b3838a40SPeter Lieven &local_err); 574b3838a40SPeter Lieven if (local_err) { 575c29b77f9SMarkus Armbruster error_reportf_err(local_err, 576c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 57785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 578b3838a40SPeter Lieven } 579b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 580b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 58185b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 582b3838a40SPeter Lieven "without setting discard operation to unmap"); 58385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 584b3838a40SPeter Lieven } 585b3838a40SPeter Lieven break; 5867a5ca864Sbellard case 'b': 5877a5ca864Sbellard bindto = optarg; 5887a5ca864Sbellard break; 5897a5ca864Sbellard case 'p': 59048bec07eSDaniel P. Berrange port = optarg; 5917a5ca864Sbellard break; 5927a5ca864Sbellard case 'o': 5937a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 5947a5ca864Sbellard if (*end) { 59585b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 59685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 5977a5ca864Sbellard } 5987a5ca864Sbellard if (dev_offset < 0) { 59985b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 60085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6017a5ca864Sbellard } 6027a5ca864Sbellard break; 6038c116b0eSWenchao Xia case 'l': 6048c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 60570b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 60670b94331SMarkus Armbruster optarg, false); 6078c116b0eSWenchao Xia if (!sn_opts) { 60885b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6098c116b0eSWenchao Xia optarg); 61085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6118c116b0eSWenchao Xia } 6128c116b0eSWenchao Xia } else { 6138c116b0eSWenchao Xia sn_id_or_name = optarg; 6148c116b0eSWenchao Xia } 6158c116b0eSWenchao Xia /* fall through */ 6167a5ca864Sbellard case 'r': 617b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 61807108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6197a5ca864Sbellard break; 6207a5ca864Sbellard case 'P': 6217a5ca864Sbellard partition = strtol(optarg, &end, 0); 622713cc671SPeter Lieven if (*end) { 62385b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 62485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 625713cc671SPeter Lieven } 626713cc671SPeter Lieven if (partition < 1 || partition > 8) { 62785b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 62885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 629713cc671SPeter Lieven } 6307a5ca864Sbellard break; 631cd831bd7Sths case 'k': 632b32f6c28SPaolo Bonzini sockpath = optarg; 633713cc671SPeter Lieven if (sockpath[0] != '/') { 6349af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 63585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 636713cc671SPeter Lieven } 637cd831bd7Sths break; 638cd831bd7Sths case 'd': 639cd831bd7Sths disconnect = true; 640cd831bd7Sths break; 641cd831bd7Sths case 'c': 642cd831bd7Sths device = optarg; 643cd831bd7Sths break; 6443b05a8e9Sths case 'e': 6453b05a8e9Sths shared = strtol(optarg, &end, 0); 6463b05a8e9Sths if (*end) { 64785b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 64885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6493b05a8e9Sths } 6503b05a8e9Sths if (shared < 1) { 6519af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 65285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6533b05a8e9Sths } 6543b05a8e9Sths break; 655e6b63677SDaniel P. Berrange case 'f': 656e6b63677SDaniel P. Berrange fmt = optarg; 657e6b63677SDaniel P. Berrange break; 65875818250Sths case 't': 65975818250Sths persistent = 1; 66075818250Sths break; 6613d4b2f9cSDaniel P. Berrange case 'x': 6623d4b2f9cSDaniel P. Berrange export_name = optarg; 6633d4b2f9cSDaniel P. Berrange break; 6647a5ca864Sbellard case 'v': 6657a5ca864Sbellard verbose = 1; 6667a5ca864Sbellard break; 6677a5ca864Sbellard case 'V': 6687a5ca864Sbellard version(argv[0]); 6697a5ca864Sbellard exit(0); 6707a5ca864Sbellard break; 6717a5ca864Sbellard case 'h': 6727a5ca864Sbellard usage(argv[0]); 6737a5ca864Sbellard exit(0); 6747a5ca864Sbellard break; 6757a5ca864Sbellard case '?': 67685b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 67785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6780ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 6790ab3b337SDaniel P. Berrange QemuOpts *opts; 6800ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 6810ab3b337SDaniel P. Berrange optarg, true); 6820ab3b337SDaniel P. Berrange if (!opts) { 6830ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 6840ab3b337SDaniel P. Berrange } 6850ab3b337SDaniel P. Berrange } break; 686145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 687145614a1SDaniel P. Berrange tlscredsid = optarg; 688145614a1SDaniel P. Berrange break; 68977c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 69077c9aaefSDaniel P. Berrange imageOpts = true; 69177c9aaefSDaniel P. Berrange break; 6927a5ca864Sbellard } 6937a5ca864Sbellard } 6947a5ca864Sbellard 6957a5ca864Sbellard if ((argc - optind) != 1) { 696433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 697433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 69885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6997a5ca864Sbellard } 7007a5ca864Sbellard 7010ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7020ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 7030ab3b337SDaniel P. Berrange NULL, &local_err)) { 7040ab3b337SDaniel P. Berrange error_report_err(local_err); 7050ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7060ab3b337SDaniel P. Berrange } 7070ab3b337SDaniel P. Berrange 708145614a1SDaniel P. Berrange if (tlscredsid) { 709145614a1SDaniel P. Berrange if (sockpath) { 710145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 711145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 712145614a1SDaniel P. Berrange } 713145614a1SDaniel P. Berrange if (device) { 714145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 715145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 716145614a1SDaniel P. Berrange } 717145614a1SDaniel P. Berrange if (!export_name) { 718145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 719145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 720145614a1SDaniel P. Berrange export_name = ""; 721145614a1SDaniel P. Berrange } 722145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 723145614a1SDaniel P. Berrange if (local_err) { 724145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 725145614a1SDaniel P. Berrange error_get_pretty(local_err)); 726145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 727145614a1SDaniel P. Berrange } 728145614a1SDaniel P. Berrange } 729145614a1SDaniel P. Berrange 730cd831bd7Sths if (disconnect) { 731d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 732d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 73385b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 73485b01e09SMarkus Armbruster strerror(errno)); 73585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 736fc19f8a0SPaolo Bonzini } 737d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 738cd831bd7Sths 739d0d6ff58SDaniel P. Berrange close(nbdfd); 740cd831bd7Sths 741cd831bd7Sths printf("%s disconnected\n", argv[optind]); 742cd831bd7Sths 743cd831bd7Sths return 0; 744cd831bd7Sths } 745cd831bd7Sths 746c1f8fdc3SPaolo Bonzini if (device && !verbose) { 747c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 748c1f8fdc3SPaolo Bonzini pid_t pid; 749c1f8fdc3SPaolo Bonzini int ret; 750c1f8fdc3SPaolo Bonzini 751fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 75285b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 75385b01e09SMarkus Armbruster strerror(errno)); 75485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 755c1f8fdc3SPaolo Bonzini } 756c1f8fdc3SPaolo Bonzini 757c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 758c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 759c1f8fdc3SPaolo Bonzini */ 760c1f8fdc3SPaolo Bonzini pid = fork(); 76170d4739eSMax Reitz if (pid < 0) { 76285b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 76385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 76470d4739eSMax Reitz } else if (pid == 0) { 765c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 7669faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 767c1f8fdc3SPaolo Bonzini 768c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 769c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 770fc19f8a0SPaolo Bonzini if (ret < 0) { 77185b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 77285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 773c1f8fdc3SPaolo Bonzini } 774c1f8fdc3SPaolo Bonzini 775c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 776c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 777c1f8fdc3SPaolo Bonzini } else { 778c1f8fdc3SPaolo Bonzini bool errors = false; 779c1f8fdc3SPaolo Bonzini char *buf; 780c1f8fdc3SPaolo Bonzini 781c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 782c1f8fdc3SPaolo Bonzini * it closes the pipe. 783c1f8fdc3SPaolo Bonzini */ 784c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 785c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 786c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 787c1f8fdc3SPaolo Bonzini errors = true; 788c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 789fc19f8a0SPaolo Bonzini if (ret < 0) { 790c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 791c1f8fdc3SPaolo Bonzini } 792c1f8fdc3SPaolo Bonzini } 793fc19f8a0SPaolo Bonzini if (ret < 0) { 79485b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 79585b01e09SMarkus Armbruster strerror(errno)); 79685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 797c1f8fdc3SPaolo Bonzini } 798c1f8fdc3SPaolo Bonzini 799c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 800c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 801c1f8fdc3SPaolo Bonzini */ 802c1f8fdc3SPaolo Bonzini exit(errors); 803c1f8fdc3SPaolo Bonzini } 804c1f8fdc3SPaolo Bonzini } 805c1f8fdc3SPaolo Bonzini 806a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 807b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 808b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 809cd831bd7Sths } 810cd831bd7Sths 81148bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 81248bec07eSDaniel P. Berrange 8132f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 814565f65d2SMarkus Armbruster error_report_err(local_err); 8152f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8162f78e491SChrysostomos Nanakos } 817802ddc37SPaolo Bonzini bdrv_init(); 818802ddc37SPaolo Bonzini atexit(bdrv_close_all); 819802ddc37SPaolo Bonzini 82077c9aaefSDaniel P. Berrange srcpath = argv[optind]; 82177c9aaefSDaniel P. Berrange if (imageOpts) { 82277c9aaefSDaniel P. Berrange QemuOpts *opts; 82377c9aaefSDaniel P. Berrange if (fmt) { 82477c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 82577c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 82677c9aaefSDaniel P. Berrange } 82777c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 82877c9aaefSDaniel P. Berrange if (!opts) { 82977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 83077c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 83177c9aaefSDaniel P. Berrange } 83277c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 83377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 83477c9aaefSDaniel P. Berrange blk = blk_new_open("hda", NULL, NULL, options, flags, &local_err); 83577c9aaefSDaniel P. Berrange } else { 836e6b63677SDaniel P. Berrange if (fmt) { 8374fbec260SMax Reitz options = qdict_new(); 8384fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 839e6b63677SDaniel P. Berrange } 8404fbec260SMax Reitz blk = blk_new_open("hda", srcpath, NULL, options, flags, &local_err); 84177c9aaefSDaniel P. Berrange } 84277c9aaefSDaniel P. Berrange 8434fbec260SMax Reitz if (!blk) { 844c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 845c29b77f9SMarkus Armbruster argv[optind]); 84685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 847802ddc37SPaolo Bonzini } 8484fbec260SMax Reitz bs = blk_bs(blk); 849802ddc37SPaolo Bonzini 8508c116b0eSWenchao Xia if (sn_opts) { 8518c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 8528c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 8538c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 8548c116b0eSWenchao Xia &local_err); 8558c116b0eSWenchao Xia } else if (sn_id_or_name) { 8568c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 8578c116b0eSWenchao Xia &local_err); 8588c116b0eSWenchao Xia } 8598c116b0eSWenchao Xia if (ret < 0) { 860c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 86185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8628c116b0eSWenchao Xia } 8638c116b0eSWenchao Xia 864b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 8654c58e80aSMax Reitz fd_size = blk_getlength(blk); 86698f44bbeSMax Reitz if (fd_size < 0) { 86785b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 86898f44bbeSMax Reitz strerror(-fd_size)); 86985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 87098f44bbeSMax Reitz } 871802ddc37SPaolo Bonzini 872185b4338SPaolo Bonzini if (partition != -1) { 8734c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 874185b4338SPaolo Bonzini if (ret < 0) { 87585b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 876a4699e55SMarkus Armbruster strerror(-ret)); 87785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 878802ddc37SPaolo Bonzini } 879185b4338SPaolo Bonzini } 880802ddc37SPaolo Bonzini 88198f44bbeSMax Reitz exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, 88298f44bbeSMax Reitz &local_err); 88398f44bbeSMax Reitz if (!exp) { 8844fffeb5eSMarkus Armbruster error_report_err(local_err); 88585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 88698f44bbeSMax Reitz } 8873d4b2f9cSDaniel P. Berrange if (export_name) { 8883d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 8893d4b2f9cSDaniel P. Berrange newproto = true; 8903d4b2f9cSDaniel P. Berrange } 8913b05a8e9Sths 892d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 893d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 894d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 89548bec07eSDaniel P. Berrange error_report_err(local_err); 8967a5ca864Sbellard return 1; 897a61c6782SPaolo Bonzini } 898f1ef5555SPaolo Bonzini 899f1ef5555SPaolo Bonzini if (device) { 900f1ef5555SPaolo Bonzini int ret; 901f1ef5555SPaolo Bonzini 902a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 903f1ef5555SPaolo Bonzini if (ret != 0) { 90485b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 90585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 906f1ef5555SPaolo Bonzini } 907f1ef5555SPaolo Bonzini } else { 908f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 909f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 910f1ef5555SPaolo Bonzini } 911f1ef5555SPaolo Bonzini 912d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9137a5ca864Sbellard 9149faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9159faf31b6SMichael Tokarev * to free any busy filesystems */ 9169faf31b6SMichael Tokarev if (chdir("/") < 0) { 91785b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 91885b01e09SMarkus Armbruster strerror(errno)); 91985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9209faf31b6SMichael Tokarev } 9219faf31b6SMichael Tokarev 9227860a380SPaolo Bonzini state = RUNNING; 9233b05a8e9Sths do { 924a61c6782SPaolo Bonzini main_loop_wait(false); 9257860a380SPaolo Bonzini if (state == TERMINATE) { 9267860a380SPaolo Bonzini state = TERMINATING; 927af49bbbeSPaolo Bonzini nbd_export_close(exp); 9282c8d9f06SPaolo Bonzini nbd_export_put(exp); 9297860a380SPaolo Bonzini exp = NULL; 9307860a380SPaolo Bonzini } 9317860a380SPaolo Bonzini } while (state != TERMINATED); 9322c8d9f06SPaolo Bonzini 93326f54e9aSMarkus Armbruster blk_unref(blk); 934b32f6c28SPaolo Bonzini if (sockpath) { 935b32f6c28SPaolo Bonzini unlink(sockpath); 936b32f6c28SPaolo Bonzini } 9377a5ca864Sbellard 9388c116b0eSWenchao Xia qemu_opts_del(sn_opts); 9398c116b0eSWenchao Xia 940a517e88bSPaolo Bonzini if (device) { 941a517e88bSPaolo Bonzini void *ret; 942a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 943a517e88bSPaolo Bonzini exit(ret != NULL); 944a517e88bSPaolo Bonzini } else { 945a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 946a517e88bSPaolo Bonzini } 9477a5ca864Sbellard } 948