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" 22*f348b6d1SVeronia 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" 347a5ca864Sbellard 357a5ca864Sbellard #include <getopt.h> 362bff4b6fSBlue Swirl #include <libgen.h> 37a517e88bSPaolo Bonzini #include <pthread.h> 38cd831bd7Sths 39cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 40fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 41fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 42fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 43fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 44fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 45fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 46fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 477a5ca864Sbellard 48af49bbbeSPaolo Bonzini static NBDExport *exp; 493d4b2f9cSDaniel P. Berrange static bool newproto; 50b1d8e52eSblueswir1 static int verbose; 51a517e88bSPaolo Bonzini static char *srcpath; 5248bec07eSDaniel P. Berrange static SocketAddress *saddr; 537860a380SPaolo Bonzini static int persistent = 0; 547860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 55a61c6782SPaolo Bonzini static int shared = 1; 56a61c6782SPaolo Bonzini static int nb_fds; 57d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 58d0d6ff58SDaniel P. Berrange static int server_watch = -1; 59145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 607a5ca864Sbellard 617a5ca864Sbellard static void usage(const char *name) 627a5ca864Sbellard { 63b033cd86SPaolo Bonzini (printf) ( 647a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 657a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 667a5ca864Sbellard "\n" 677a5ca864Sbellard " -h, --help display this help and exit\n" 687a5ca864Sbellard " -V, --version output version information and exit\n" 697a5ca864Sbellard "\n" 70b033cd86SPaolo Bonzini "Connection properties:\n" 71b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 72b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 73b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 74b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 75b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 76b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 77b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 78b033cd86SPaolo Bonzini "\n" 79b033cd86SPaolo Bonzini "Exposing part of the image:\n" 80b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 81b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 82b033cd86SPaolo Bonzini "\n" 830ab3b337SDaniel P. Berrange "General purpose options:\n" 840ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 850ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 86b033cd86SPaolo Bonzini #ifdef __linux__ 87b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 88b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 89b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 90b033cd86SPaolo Bonzini "\n" 91b033cd86SPaolo Bonzini #endif 92b033cd86SPaolo Bonzini "\n" 93b033cd86SPaolo Bonzini "Block device options:\n" 944323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 95b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 968c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 978c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 988c116b0eSWenchao Xia " the temporary one\n" 998c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1008c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1018c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1028c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1038c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 104b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 10539a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 10639a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 107b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1086883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 10977c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 110b033cd86SPaolo Bonzini "\n" 111b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 112c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1137a5ca864Sbellard } 1147a5ca864Sbellard 1157a5ca864Sbellard static void version(const char *name) 1167a5ca864Sbellard { 1177a5ca864Sbellard printf( 118315bc7aaSths "%s version 0.0.1\n" 1197a5ca864Sbellard "Written by Anthony Liguori.\n" 1207a5ca864Sbellard "\n" 1217a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1227a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1237a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 124315bc7aaSths , name); 1257a5ca864Sbellard } 1267a5ca864Sbellard 1277a5ca864Sbellard struct partition_record 1287a5ca864Sbellard { 1297a5ca864Sbellard uint8_t bootable; 1307a5ca864Sbellard uint8_t start_head; 1317a5ca864Sbellard uint32_t start_cylinder; 1327a5ca864Sbellard uint8_t start_sector; 1337a5ca864Sbellard uint8_t system; 1347a5ca864Sbellard uint8_t end_head; 1357a5ca864Sbellard uint8_t end_cylinder; 1367a5ca864Sbellard uint8_t end_sector; 1377a5ca864Sbellard uint32_t start_sector_abs; 1387a5ca864Sbellard uint32_t nb_sectors_abs; 1397a5ca864Sbellard }; 1407a5ca864Sbellard 1417a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1427a5ca864Sbellard { 1437a5ca864Sbellard r->bootable = p[0]; 1447a5ca864Sbellard r->start_head = p[1]; 1457a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1467a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1477a5ca864Sbellard r->system = p[4]; 1487a5ca864Sbellard r->end_head = p[5]; 1497a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1507a5ca864Sbellard r->end_sector = p[6] & 0x3f; 151ac97393dSMax Reitz 152ac97393dSMax Reitz r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); 153ac97393dSMax Reitz r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); 1547a5ca864Sbellard } 1557a5ca864Sbellard 1564c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1577a5ca864Sbellard off_t *offset, off_t *size) 1587a5ca864Sbellard { 1597a5ca864Sbellard struct partition_record mbr[4]; 1607a5ca864Sbellard uint8_t data[512]; 1617a5ca864Sbellard int i; 1627a5ca864Sbellard int ext_partnum = 4; 163cb7cf0e3SRyota Ozaki int ret; 1647a5ca864Sbellard 1654c58e80aSMax Reitz if ((ret = blk_read(blk, 0, data, 1)) < 0) { 166a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 16785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 168cb7cf0e3SRyota Ozaki } 1697a5ca864Sbellard 1707a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 171185b4338SPaolo Bonzini return -EINVAL; 1727a5ca864Sbellard } 1737a5ca864Sbellard 1747a5ca864Sbellard for (i = 0; i < 4; i++) { 1757a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1767a5ca864Sbellard 177453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1787a5ca864Sbellard continue; 179453b07b1SMax Reitz } 1807a5ca864Sbellard 1817a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1827a5ca864Sbellard struct partition_record ext[4]; 1837a5ca864Sbellard uint8_t data1[512]; 1847a5ca864Sbellard int j; 1857a5ca864Sbellard 1864c58e80aSMax Reitz if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) { 187a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 189cb7cf0e3SRyota Ozaki } 1907a5ca864Sbellard 1917a5ca864Sbellard for (j = 0; j < 4; j++) { 1927a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 193453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 1947a5ca864Sbellard continue; 195453b07b1SMax Reitz } 1967a5ca864Sbellard 1977a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 1987a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 1997a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2007a5ca864Sbellard return 0; 2017a5ca864Sbellard } 2027a5ca864Sbellard } 2037a5ca864Sbellard ext_partnum += 4; 2047a5ca864Sbellard } else if ((i + 1) == partition) { 2057a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2067a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2077a5ca864Sbellard return 0; 2087a5ca864Sbellard } 2097a5ca864Sbellard } 2107a5ca864Sbellard 211185b4338SPaolo Bonzini return -ENOENT; 2127a5ca864Sbellard } 2137a5ca864Sbellard 214bb345110SPaolo Bonzini static void termsig_handler(int signum) 215bb345110SPaolo Bonzini { 2167860a380SPaolo Bonzini state = TERMINATE; 217a61c6782SPaolo Bonzini qemu_notify_event(); 218bb345110SPaolo Bonzini } 219bb345110SPaolo Bonzini 220537b41f5SPaolo Bonzini 221a517e88bSPaolo Bonzini static void *show_parts(void *arg) 222cd831bd7Sths { 223a6ac2313SPaolo Bonzini char *device = arg; 224cd831bd7Sths int nbd; 225cd831bd7Sths 226cd831bd7Sths /* linux just needs an open() to trigger 227cd831bd7Sths * the partition table update 228cd831bd7Sths * but remember to load the module with max_part != 0 : 229cd831bd7Sths * modprobe nbd max_part=63 230cd831bd7Sths */ 231cd831bd7Sths nbd = open(device, O_RDWR); 232fc19f8a0SPaolo Bonzini if (nbd >= 0) { 233cd831bd7Sths close(nbd); 234cd831bd7Sths } 235a517e88bSPaolo Bonzini return NULL; 236a517e88bSPaolo Bonzini } 237a517e88bSPaolo Bonzini 238a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 239a517e88bSPaolo Bonzini { 240a6ac2313SPaolo Bonzini char *device = arg; 241a517e88bSPaolo Bonzini off_t size; 242a517e88bSPaolo Bonzini uint32_t nbdflags; 243d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 244d0d6ff58SDaniel P. Berrange int fd; 245a517e88bSPaolo Bonzini int ret; 246a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2471ce52846SMax Reitz Error *local_error = NULL; 248a517e88bSPaolo Bonzini 249d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 250d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 251d0d6ff58SDaniel P. Berrange saddr, 252d0d6ff58SDaniel P. Berrange &local_error) < 0) { 25348bec07eSDaniel P. Berrange error_report_err(local_error); 254a517e88bSPaolo Bonzini goto out; 255a517e88bSPaolo Bonzini } 256a517e88bSPaolo Bonzini 2571c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 258f95910feSDaniel P. Berrange NULL, NULL, NULL, 2593f472659SMax Reitz &size, &local_error); 260fc19f8a0SPaolo Bonzini if (ret < 0) { 2611ce52846SMax Reitz if (local_error) { 26278288671SMarkus Armbruster error_report_err(local_error); 2631ce52846SMax Reitz } 2640c544d73SPaolo Bonzini goto out_socket; 265a517e88bSPaolo Bonzini } 266a517e88bSPaolo Bonzini 267a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 268fc19f8a0SPaolo Bonzini if (fd < 0) { 269a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 270b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2710c544d73SPaolo Bonzini goto out_socket; 272a6ac2313SPaolo Bonzini } 273a6ac2313SPaolo Bonzini 2741c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 275fc19f8a0SPaolo Bonzini if (ret < 0) { 2760c544d73SPaolo Bonzini goto out_fd; 277a517e88bSPaolo Bonzini } 278a517e88bSPaolo Bonzini 279a517e88bSPaolo Bonzini /* update partition table */ 280a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 281a517e88bSPaolo Bonzini 282c1f8fdc3SPaolo Bonzini if (verbose) { 283a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 284a517e88bSPaolo Bonzini device, srcpath); 285c1f8fdc3SPaolo Bonzini } else { 286c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 287c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 288c1f8fdc3SPaolo Bonzini } 289a517e88bSPaolo Bonzini 290a517e88bSPaolo Bonzini ret = nbd_client(fd); 291a517e88bSPaolo Bonzini if (ret) { 2920c544d73SPaolo Bonzini goto out_fd; 293a517e88bSPaolo Bonzini } 294a517e88bSPaolo Bonzini close(fd); 295d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 296a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 297a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 298a517e88bSPaolo Bonzini 2990c544d73SPaolo Bonzini out_fd: 3000c544d73SPaolo Bonzini close(fd); 3010c544d73SPaolo Bonzini out_socket: 302d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 303a517e88bSPaolo Bonzini out: 304a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 305a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 306cd831bd7Sths } 307cd831bd7Sths 308e4afbf4fSFam Zheng static int nbd_can_accept(void) 309a61c6782SPaolo Bonzini { 310a61c6782SPaolo Bonzini return nb_fds < shared; 311a61c6782SPaolo Bonzini } 312a61c6782SPaolo Bonzini 3137860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3147860a380SPaolo Bonzini { 3157860a380SPaolo Bonzini assert(state == TERMINATING); 3167860a380SPaolo Bonzini state = TERMINATED; 3177860a380SPaolo Bonzini } 3187860a380SPaolo Bonzini 319d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 320e4afbf4fSFam Zheng 3211743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 322a61c6782SPaolo Bonzini { 323a61c6782SPaolo Bonzini nb_fds--; 3247860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3257860a380SPaolo Bonzini state = TERMINATE; 3267860a380SPaolo Bonzini } 327d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3287860a380SPaolo Bonzini nbd_client_put(client); 329a61c6782SPaolo Bonzini } 330a61c6782SPaolo Bonzini 331d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 332a61c6782SPaolo Bonzini { 333d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 334a61c6782SPaolo Bonzini 335d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 336d0d6ff58SDaniel P. Berrange NULL); 337d0d6ff58SDaniel P. Berrange if (!cioc) { 338d0d6ff58SDaniel P. Berrange return TRUE; 3390c544d73SPaolo Bonzini } 3400c544d73SPaolo Bonzini 3417860a380SPaolo Bonzini if (state >= TERMINATE) { 342d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 343d0d6ff58SDaniel P. Berrange return TRUE; 3447860a380SPaolo Bonzini } 3457860a380SPaolo Bonzini 346a61c6782SPaolo Bonzini nb_fds++; 347d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 348f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 349145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 350d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 351a61c6782SPaolo Bonzini 352d0d6ff58SDaniel P. Berrange return TRUE; 353d0d6ff58SDaniel P. Berrange } 354d0d6ff58SDaniel P. Berrange 355d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 356e4afbf4fSFam Zheng { 357e4afbf4fSFam Zheng if (nbd_can_accept()) { 358d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 359d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 360d0d6ff58SDaniel P. Berrange G_IO_IN, 361d0d6ff58SDaniel P. Berrange nbd_accept, 362d0d6ff58SDaniel P. Berrange NULL, NULL); 363d0d6ff58SDaniel P. Berrange } 364e4afbf4fSFam Zheng } else { 365d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 366d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 367d0d6ff58SDaniel P. Berrange server_watch = -1; 368d0d6ff58SDaniel P. Berrange } 369e4afbf4fSFam Zheng } 370e4afbf4fSFam Zheng } 371e4afbf4fSFam Zheng 37248bec07eSDaniel P. Berrange 37348bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 37448bec07eSDaniel P. Berrange const char *bindto, 37548bec07eSDaniel P. Berrange const char *port) 37648bec07eSDaniel P. Berrange { 37748bec07eSDaniel P. Berrange SocketAddress *saddr; 37848bec07eSDaniel P. Berrange 37948bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 38048bec07eSDaniel P. Berrange if (sockpath) { 3812d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 38232bafa8fSEric Blake saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 38332bafa8fSEric Blake saddr->u.q_unix.data->path = g_strdup(sockpath); 38448bec07eSDaniel P. Berrange } else { 3850399293eSEric Blake InetSocketAddress *inet; 3862d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 38732bafa8fSEric Blake inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); 3880399293eSEric Blake inet->host = g_strdup(bindto); 38948bec07eSDaniel P. Berrange if (port) { 3900399293eSEric Blake inet->port = g_strdup(port); 39148bec07eSDaniel P. Berrange } else { 3920399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39348bec07eSDaniel P. Berrange } 39448bec07eSDaniel P. Berrange } 39548bec07eSDaniel P. Berrange 39648bec07eSDaniel P. Berrange return saddr; 39748bec07eSDaniel P. Berrange } 39848bec07eSDaniel P. Berrange 39948bec07eSDaniel P. Berrange 40077c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 40177c9aaefSDaniel P. Berrange .name = "file", 40277c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40377c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40477c9aaefSDaniel P. Berrange .desc = { 40577c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40677c9aaefSDaniel P. Berrange { /* end of list */ } 40777c9aaefSDaniel P. Berrange }, 40877c9aaefSDaniel P. Berrange }; 40977c9aaefSDaniel P. Berrange 4100ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4110ab3b337SDaniel P. Berrange .name = "object", 4120ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4130ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4140ab3b337SDaniel P. Berrange .desc = { 4150ab3b337SDaniel P. Berrange { } 4160ab3b337SDaniel P. Berrange }, 4170ab3b337SDaniel P. Berrange }; 4180ab3b337SDaniel P. Berrange 4190ab3b337SDaniel P. Berrange 420145614a1SDaniel P. Berrange 421145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 422145614a1SDaniel P. Berrange { 423145614a1SDaniel P. Berrange Object *obj; 424145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 425145614a1SDaniel P. Berrange 426145614a1SDaniel P. Berrange obj = object_resolve_path_component( 427145614a1SDaniel P. Berrange object_get_objects_root(), id); 428145614a1SDaniel P. Berrange if (!obj) { 429145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 430145614a1SDaniel P. Berrange id); 431145614a1SDaniel P. Berrange return NULL; 432145614a1SDaniel P. Berrange } 433145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 434145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 435145614a1SDaniel P. Berrange if (!creds) { 436145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 437145614a1SDaniel P. Berrange id); 438145614a1SDaniel P. Berrange return NULL; 439145614a1SDaniel P. Berrange } 440145614a1SDaniel P. Berrange 441145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 442145614a1SDaniel P. Berrange error_setg(errp, 443145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 444145614a1SDaniel P. Berrange return NULL; 445145614a1SDaniel P. Berrange } 446145614a1SDaniel P. Berrange object_ref(obj); 447145614a1SDaniel P. Berrange return creds; 448145614a1SDaniel P. Berrange } 449145614a1SDaniel P. Berrange 450145614a1SDaniel P. Berrange 4517a5ca864Sbellard int main(int argc, char **argv) 4527a5ca864Sbellard { 45326f54e9aSMarkus Armbruster BlockBackend *blk; 4547a5ca864Sbellard BlockDriverState *bs; 4557a5ca864Sbellard off_t dev_offset = 0; 456b90fb4b8SPaolo Bonzini uint32_t nbdflags = 0; 457cd831bd7Sths bool disconnect = false; 4587a5ca864Sbellard const char *bindto = "0.0.0.0"; 45948bec07eSDaniel P. Berrange const char *port = NULL; 46048bec07eSDaniel P. Berrange char *sockpath = NULL; 461a6ac2313SPaolo Bonzini char *device = NULL; 4627a5ca864Sbellard off_t fd_size; 4638c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4648c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 4653d4b2f9cSDaniel P. Berrange const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:"; 4667a5ca864Sbellard struct option lopt[] = { 467aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 468aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 469aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 470aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 471aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 472aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 473aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 474aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 475aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 476aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 477aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 478aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 479aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 480aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 481aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 482aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 483aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 484aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 485aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 486aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 487aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 488aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 489aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 490aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 491aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 492aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 493660f11beSBlue Swirl { NULL, 0, NULL, 0 } 4947a5ca864Sbellard }; 4957a5ca864Sbellard int ch; 4967a5ca864Sbellard int opt_ind = 0; 4977a5ca864Sbellard char *end; 498f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 4997a5ca864Sbellard int partition = -1; 5004fbec260SMax Reitz int ret = 0; 50139a5235cSPaolo Bonzini bool seen_cache = false; 502ded9d2d5SPaolo Bonzini bool seen_discard = false; 50339a5235cSPaolo Bonzini bool seen_aio = false; 504a517e88bSPaolo Bonzini pthread_t client_thread; 505e6b63677SDaniel P. Berrange const char *fmt = NULL; 50634b5d2c6SMax Reitz Error *local_err = NULL; 507b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5084fbec260SMax Reitz QDict *options = NULL; 5093d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 510145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 51177c9aaefSDaniel P. Berrange bool imageOpts = false; 5127a5ca864Sbellard 513a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 514a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 515a517e88bSPaolo Bonzini */ 516bb345110SPaolo Bonzini struct sigaction sa_sigterm; 517bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 518bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 519bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 5200ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5210ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 52210f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 523bb345110SPaolo Bonzini 5247a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5257a5ca864Sbellard switch (ch) { 5267a5ca864Sbellard case 's': 5272f726488Sths flags |= BDRV_O_SNAPSHOT; 5282f726488Sths break; 5292f726488Sths case 'n': 53039a5235cSPaolo Bonzini optarg = (char *) "none"; 53139a5235cSPaolo Bonzini /* fallthrough */ 53239a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 53339a5235cSPaolo Bonzini if (seen_cache) { 53485b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 53585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 53639a5235cSPaolo Bonzini } 53739a5235cSPaolo Bonzini seen_cache = true; 53839a5235cSPaolo Bonzini if (bdrv_parse_cache_flags(optarg, &flags) == -1) { 53985b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 54085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 54139a5235cSPaolo Bonzini } 5427a5ca864Sbellard break; 54339a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 54439a5235cSPaolo Bonzini if (seen_aio) { 54585b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 54685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 54739a5235cSPaolo Bonzini } 54839a5235cSPaolo Bonzini seen_aio = true; 54939a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 55039a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 55139a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 55239a5235cSPaolo Bonzini /* this is the default */ 55339a5235cSPaolo Bonzini } else { 55485b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 55585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55639a5235cSPaolo Bonzini } 55739a5235cSPaolo Bonzini break; 558ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 559ded9d2d5SPaolo Bonzini if (seen_discard) { 56085b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 56185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 562ded9d2d5SPaolo Bonzini } 563ded9d2d5SPaolo Bonzini seen_discard = true; 564ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 56585b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 56685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 567ded9d2d5SPaolo Bonzini } 568ded9d2d5SPaolo Bonzini break; 569b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 570b3838a40SPeter Lieven detect_zeroes = 571b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 572b3838a40SPeter Lieven optarg, 5737fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 574b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 575b3838a40SPeter Lieven &local_err); 576b3838a40SPeter Lieven if (local_err) { 577c29b77f9SMarkus Armbruster error_reportf_err(local_err, 578c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 57985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 580b3838a40SPeter Lieven } 581b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 582b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 58385b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 584b3838a40SPeter Lieven "without setting discard operation to unmap"); 58585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 586b3838a40SPeter Lieven } 587b3838a40SPeter Lieven break; 5887a5ca864Sbellard case 'b': 5897a5ca864Sbellard bindto = optarg; 5907a5ca864Sbellard break; 5917a5ca864Sbellard case 'p': 59248bec07eSDaniel P. Berrange port = optarg; 5937a5ca864Sbellard break; 5947a5ca864Sbellard case 'o': 5957a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 5967a5ca864Sbellard if (*end) { 59785b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 59885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 5997a5ca864Sbellard } 6007a5ca864Sbellard if (dev_offset < 0) { 60185b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 60285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6037a5ca864Sbellard } 6047a5ca864Sbellard break; 6058c116b0eSWenchao Xia case 'l': 6068c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 60770b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 60870b94331SMarkus Armbruster optarg, false); 6098c116b0eSWenchao Xia if (!sn_opts) { 61085b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6118c116b0eSWenchao Xia optarg); 61285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6138c116b0eSWenchao Xia } 6148c116b0eSWenchao Xia } else { 6158c116b0eSWenchao Xia sn_id_or_name = optarg; 6168c116b0eSWenchao Xia } 6178c116b0eSWenchao Xia /* fall through */ 6187a5ca864Sbellard case 'r': 619b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 62007108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6217a5ca864Sbellard break; 6227a5ca864Sbellard case 'P': 6237a5ca864Sbellard partition = strtol(optarg, &end, 0); 624713cc671SPeter Lieven if (*end) { 62585b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 62685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 627713cc671SPeter Lieven } 628713cc671SPeter Lieven if (partition < 1 || partition > 8) { 62985b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 63085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 631713cc671SPeter Lieven } 6327a5ca864Sbellard break; 633cd831bd7Sths case 'k': 634b32f6c28SPaolo Bonzini sockpath = optarg; 635713cc671SPeter Lieven if (sockpath[0] != '/') { 6369af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 63785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 638713cc671SPeter Lieven } 639cd831bd7Sths break; 640cd831bd7Sths case 'd': 641cd831bd7Sths disconnect = true; 642cd831bd7Sths break; 643cd831bd7Sths case 'c': 644cd831bd7Sths device = optarg; 645cd831bd7Sths break; 6463b05a8e9Sths case 'e': 6473b05a8e9Sths shared = strtol(optarg, &end, 0); 6483b05a8e9Sths if (*end) { 64985b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 65085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6513b05a8e9Sths } 6523b05a8e9Sths if (shared < 1) { 6539af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 65485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6553b05a8e9Sths } 6563b05a8e9Sths break; 657e6b63677SDaniel P. Berrange case 'f': 658e6b63677SDaniel P. Berrange fmt = optarg; 659e6b63677SDaniel P. Berrange break; 66075818250Sths case 't': 66175818250Sths persistent = 1; 66275818250Sths break; 6633d4b2f9cSDaniel P. Berrange case 'x': 6643d4b2f9cSDaniel P. Berrange export_name = optarg; 6653d4b2f9cSDaniel P. Berrange break; 6667a5ca864Sbellard case 'v': 6677a5ca864Sbellard verbose = 1; 6687a5ca864Sbellard break; 6697a5ca864Sbellard case 'V': 6707a5ca864Sbellard version(argv[0]); 6717a5ca864Sbellard exit(0); 6727a5ca864Sbellard break; 6737a5ca864Sbellard case 'h': 6747a5ca864Sbellard usage(argv[0]); 6757a5ca864Sbellard exit(0); 6767a5ca864Sbellard break; 6777a5ca864Sbellard case '?': 67885b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 67985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6800ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 6810ab3b337SDaniel P. Berrange QemuOpts *opts; 6820ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 6830ab3b337SDaniel P. Berrange optarg, true); 6840ab3b337SDaniel P. Berrange if (!opts) { 6850ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 6860ab3b337SDaniel P. Berrange } 6870ab3b337SDaniel P. Berrange } break; 688145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 689145614a1SDaniel P. Berrange tlscredsid = optarg; 690145614a1SDaniel P. Berrange break; 69177c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 69277c9aaefSDaniel P. Berrange imageOpts = true; 69377c9aaefSDaniel P. Berrange break; 6947a5ca864Sbellard } 6957a5ca864Sbellard } 6967a5ca864Sbellard 6977a5ca864Sbellard if ((argc - optind) != 1) { 698433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 699433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 70085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7017a5ca864Sbellard } 7027a5ca864Sbellard 7030ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7040ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 7050ab3b337SDaniel P. Berrange NULL, &local_err)) { 7060ab3b337SDaniel P. Berrange error_report_err(local_err); 7070ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7080ab3b337SDaniel P. Berrange } 7090ab3b337SDaniel P. Berrange 710145614a1SDaniel P. Berrange if (tlscredsid) { 711145614a1SDaniel P. Berrange if (sockpath) { 712145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 713145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 714145614a1SDaniel P. Berrange } 715145614a1SDaniel P. Berrange if (device) { 716145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 717145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 718145614a1SDaniel P. Berrange } 719145614a1SDaniel P. Berrange if (!export_name) { 720145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 721145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 722145614a1SDaniel P. Berrange export_name = ""; 723145614a1SDaniel P. Berrange } 724145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 725145614a1SDaniel P. Berrange if (local_err) { 726145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 727145614a1SDaniel P. Berrange error_get_pretty(local_err)); 728145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 729145614a1SDaniel P. Berrange } 730145614a1SDaniel P. Berrange } 731145614a1SDaniel P. Berrange 732cd831bd7Sths if (disconnect) { 733d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 734d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 73585b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 73685b01e09SMarkus Armbruster strerror(errno)); 73785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 738fc19f8a0SPaolo Bonzini } 739d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 740cd831bd7Sths 741d0d6ff58SDaniel P. Berrange close(nbdfd); 742cd831bd7Sths 743cd831bd7Sths printf("%s disconnected\n", argv[optind]); 744cd831bd7Sths 745cd831bd7Sths return 0; 746cd831bd7Sths } 747cd831bd7Sths 748c1f8fdc3SPaolo Bonzini if (device && !verbose) { 749c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 750c1f8fdc3SPaolo Bonzini pid_t pid; 751c1f8fdc3SPaolo Bonzini int ret; 752c1f8fdc3SPaolo Bonzini 753fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 75485b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 75585b01e09SMarkus Armbruster strerror(errno)); 75685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 757c1f8fdc3SPaolo Bonzini } 758c1f8fdc3SPaolo Bonzini 759c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 760c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 761c1f8fdc3SPaolo Bonzini */ 762c1f8fdc3SPaolo Bonzini pid = fork(); 76370d4739eSMax Reitz if (pid < 0) { 76485b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 76585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 76670d4739eSMax Reitz } else if (pid == 0) { 767c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 7689faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 769c1f8fdc3SPaolo Bonzini 770c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 771c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 772fc19f8a0SPaolo Bonzini if (ret < 0) { 77385b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 77485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 775c1f8fdc3SPaolo Bonzini } 776c1f8fdc3SPaolo Bonzini 777c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 778c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 779c1f8fdc3SPaolo Bonzini } else { 780c1f8fdc3SPaolo Bonzini bool errors = false; 781c1f8fdc3SPaolo Bonzini char *buf; 782c1f8fdc3SPaolo Bonzini 783c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 784c1f8fdc3SPaolo Bonzini * it closes the pipe. 785c1f8fdc3SPaolo Bonzini */ 786c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 787c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 788c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 789c1f8fdc3SPaolo Bonzini errors = true; 790c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 791fc19f8a0SPaolo Bonzini if (ret < 0) { 792c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 793c1f8fdc3SPaolo Bonzini } 794c1f8fdc3SPaolo Bonzini } 795fc19f8a0SPaolo Bonzini if (ret < 0) { 79685b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 79785b01e09SMarkus Armbruster strerror(errno)); 79885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 799c1f8fdc3SPaolo Bonzini } 800c1f8fdc3SPaolo Bonzini 801c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 802c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 803c1f8fdc3SPaolo Bonzini */ 804c1f8fdc3SPaolo Bonzini exit(errors); 805c1f8fdc3SPaolo Bonzini } 806c1f8fdc3SPaolo Bonzini } 807c1f8fdc3SPaolo Bonzini 808a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 809b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 810b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 811cd831bd7Sths } 812cd831bd7Sths 81348bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 81448bec07eSDaniel P. Berrange 8152f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 816565f65d2SMarkus Armbruster error_report_err(local_err); 8172f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8182f78e491SChrysostomos Nanakos } 819802ddc37SPaolo Bonzini bdrv_init(); 820802ddc37SPaolo Bonzini atexit(bdrv_close_all); 821802ddc37SPaolo Bonzini 82277c9aaefSDaniel P. Berrange srcpath = argv[optind]; 82377c9aaefSDaniel P. Berrange if (imageOpts) { 82477c9aaefSDaniel P. Berrange QemuOpts *opts; 82577c9aaefSDaniel P. Berrange if (fmt) { 82677c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 82777c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 82877c9aaefSDaniel P. Berrange } 82977c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 83077c9aaefSDaniel P. Berrange if (!opts) { 83177c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 83277c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 83377c9aaefSDaniel P. Berrange } 83477c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 83577c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 836efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 83777c9aaefSDaniel P. Berrange } else { 838e6b63677SDaniel P. Berrange if (fmt) { 8394fbec260SMax Reitz options = qdict_new(); 8404fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 841e6b63677SDaniel P. Berrange } 842efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 84377c9aaefSDaniel P. Berrange } 84477c9aaefSDaniel P. Berrange 8454fbec260SMax Reitz if (!blk) { 846c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 847c29b77f9SMarkus Armbruster argv[optind]); 84885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 849802ddc37SPaolo Bonzini } 8504fbec260SMax Reitz bs = blk_bs(blk); 851802ddc37SPaolo Bonzini 8528c116b0eSWenchao Xia if (sn_opts) { 8538c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 8548c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 8558c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 8568c116b0eSWenchao Xia &local_err); 8578c116b0eSWenchao Xia } else if (sn_id_or_name) { 8588c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 8598c116b0eSWenchao Xia &local_err); 8608c116b0eSWenchao Xia } 8618c116b0eSWenchao Xia if (ret < 0) { 862c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 86385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8648c116b0eSWenchao Xia } 8658c116b0eSWenchao Xia 866b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 8674c58e80aSMax Reitz fd_size = blk_getlength(blk); 86898f44bbeSMax Reitz if (fd_size < 0) { 86985b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 87098f44bbeSMax Reitz strerror(-fd_size)); 87185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 87298f44bbeSMax Reitz } 873802ddc37SPaolo Bonzini 874185b4338SPaolo Bonzini if (partition != -1) { 8754c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 876185b4338SPaolo Bonzini if (ret < 0) { 87785b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 878a4699e55SMarkus Armbruster strerror(-ret)); 87985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 880802ddc37SPaolo Bonzini } 881185b4338SPaolo Bonzini } 882802ddc37SPaolo Bonzini 88398f44bbeSMax Reitz exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, 88498f44bbeSMax Reitz &local_err); 88598f44bbeSMax Reitz if (!exp) { 8864fffeb5eSMarkus Armbruster error_report_err(local_err); 88785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 88898f44bbeSMax Reitz } 8893d4b2f9cSDaniel P. Berrange if (export_name) { 8903d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 8913d4b2f9cSDaniel P. Berrange newproto = true; 8923d4b2f9cSDaniel P. Berrange } 8933b05a8e9Sths 894d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 895d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 896d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 89748bec07eSDaniel P. Berrange error_report_err(local_err); 8987a5ca864Sbellard return 1; 899a61c6782SPaolo Bonzini } 900f1ef5555SPaolo Bonzini 901f1ef5555SPaolo Bonzini if (device) { 902f1ef5555SPaolo Bonzini int ret; 903f1ef5555SPaolo Bonzini 904a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 905f1ef5555SPaolo Bonzini if (ret != 0) { 90685b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 90785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 908f1ef5555SPaolo Bonzini } 909f1ef5555SPaolo Bonzini } else { 910f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 911f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 912f1ef5555SPaolo Bonzini } 913f1ef5555SPaolo Bonzini 914d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9157a5ca864Sbellard 9169faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9179faf31b6SMichael Tokarev * to free any busy filesystems */ 9189faf31b6SMichael Tokarev if (chdir("/") < 0) { 91985b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 92085b01e09SMarkus Armbruster strerror(errno)); 92185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9229faf31b6SMichael Tokarev } 9239faf31b6SMichael Tokarev 9247860a380SPaolo Bonzini state = RUNNING; 9253b05a8e9Sths do { 926a61c6782SPaolo Bonzini main_loop_wait(false); 9277860a380SPaolo Bonzini if (state == TERMINATE) { 9287860a380SPaolo Bonzini state = TERMINATING; 929af49bbbeSPaolo Bonzini nbd_export_close(exp); 9302c8d9f06SPaolo Bonzini nbd_export_put(exp); 9317860a380SPaolo Bonzini exp = NULL; 9327860a380SPaolo Bonzini } 9337860a380SPaolo Bonzini } while (state != TERMINATED); 9342c8d9f06SPaolo Bonzini 93526f54e9aSMarkus Armbruster blk_unref(blk); 936b32f6c28SPaolo Bonzini if (sockpath) { 937b32f6c28SPaolo Bonzini unlink(sockpath); 938b32f6c28SPaolo Bonzini } 9397a5ca864Sbellard 9408c116b0eSWenchao Xia qemu_opts_del(sn_opts); 9418c116b0eSWenchao Xia 942a517e88bSPaolo Bonzini if (device) { 943a517e88bSPaolo Bonzini void *ret; 944a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 945a517e88bSPaolo Bonzini exit(ret != NULL); 946a517e88bSPaolo Bonzini } else { 947a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 948a517e88bSPaolo Bonzini } 9497a5ca864Sbellard } 950