1cd831bd7Sths /* 27a5ca864Sbellard * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> 37a5ca864Sbellard * 47a5ca864Sbellard * Network Block Device 57a5ca864Sbellard * 67a5ca864Sbellard * This program is free software; you can redistribute it and/or modify 77a5ca864Sbellard * it under the terms of the GNU General Public License as published by 87a5ca864Sbellard * the Free Software Foundation; under version 2 of the License. 97a5ca864Sbellard * 107a5ca864Sbellard * This program is distributed in the hope that it will be useful, 117a5ca864Sbellard * but WITHOUT ANY WARRANTY; without even the implied warranty of 127a5ca864Sbellard * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 137a5ca864Sbellard * GNU General Public License for more details. 147a5ca864Sbellard * 157a5ca864Sbellard * You should have received a copy of the GNU General Public License 168167ee88SBlue Swirl * along with this program; if not, see <http://www.gnu.org/licenses/>. 177a5ca864Sbellard */ 187a5ca864Sbellard 19d38ea87aSPeter Maydell #include "qemu/osdep.h" 20da34e65cSMarkus Armbruster #include "qapi/error.h" 215a61cb60SStefan Weil #include "qemu-common.h" 22f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2326f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 24b3838a40SPeter Lieven #include "block/block_int.h" 25737e150eSPaolo Bonzini #include "block/nbd.h" 266a1751b7SAlex Bligh #include "qemu/main-loop.h" 27537b41f5SPaolo Bonzini #include "qemu/error-report.h" 280ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 2958369e22SPaolo Bonzini #include "qemu/bswap.h" 3039ca463eSDenis V. Lunev #include "qemu/log.h" 318c116b0eSWenchao Xia #include "block/snapshot.h" 32b3838a40SPeter Lieven #include "qapi/util.h" 33d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 340ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 35d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 36c2297088SDaniel P. Berrange #include "crypto/init.h" 3739ca463eSDenis V. Lunev #include "trace/control.h" 387a5ca864Sbellard 397a5ca864Sbellard #include <getopt.h> 402bff4b6fSBlue Swirl #include <libgen.h> 41a517e88bSPaolo Bonzini #include <pthread.h> 42cd831bd7Sths 43cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 44fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 45fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 46fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 48fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 49fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 50fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 517a5ca864Sbellard 52bd31c214SEric Blake #define MBR_SIZE 512 53bd31c214SEric Blake 54af49bbbeSPaolo Bonzini static NBDExport *exp; 553d4b2f9cSDaniel P. Berrange static bool newproto; 56b1d8e52eSblueswir1 static int verbose; 57a517e88bSPaolo Bonzini static char *srcpath; 5848bec07eSDaniel P. Berrange static SocketAddress *saddr; 597860a380SPaolo Bonzini static int persistent = 0; 607860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 61a61c6782SPaolo Bonzini static int shared = 1; 62a61c6782SPaolo Bonzini static int nb_fds; 63d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 64d0d6ff58SDaniel P. Berrange static int server_watch = -1; 65145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 667a5ca864Sbellard 677a5ca864Sbellard static void usage(const char *name) 687a5ca864Sbellard { 69b033cd86SPaolo Bonzini (printf) ( 707a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 717a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 727a5ca864Sbellard "\n" 737a5ca864Sbellard " -h, --help display this help and exit\n" 747a5ca864Sbellard " -V, --version output version information and exit\n" 757a5ca864Sbellard "\n" 76b033cd86SPaolo Bonzini "Connection properties:\n" 77b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 78b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 79b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 80b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 81b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 82b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 83b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 84332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 85b033cd86SPaolo Bonzini "\n" 86b033cd86SPaolo Bonzini "Exposing part of the image:\n" 87b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 88b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 89b033cd86SPaolo Bonzini "\n" 900ab3b337SDaniel P. Berrange "General purpose options:\n" 910ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 920ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 9339ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 9439ca463eSDenis V. Lunev " specify tracing options\n" 95b033cd86SPaolo Bonzini #ifdef __linux__ 96b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 97b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 98b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 99b033cd86SPaolo Bonzini "\n" 100b033cd86SPaolo Bonzini #endif 101b033cd86SPaolo Bonzini "\n" 102b033cd86SPaolo Bonzini "Block device options:\n" 1034323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 104b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1058c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1068c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1078c116b0eSWenchao Xia " the temporary one\n" 1088c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1098c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1108c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1118c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1128c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 113b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 11439a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 11539a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 116b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1176883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 11877c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 119b033cd86SPaolo Bonzini "\n" 120b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 121c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1227a5ca864Sbellard } 1237a5ca864Sbellard 1247a5ca864Sbellard static void version(const char *name) 1257a5ca864Sbellard { 1267a5ca864Sbellard printf( 127315bc7aaSths "%s version 0.0.1\n" 1287a5ca864Sbellard "Written by Anthony Liguori.\n" 1297a5ca864Sbellard "\n" 1307a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1317a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1327a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 133315bc7aaSths , name); 1347a5ca864Sbellard } 1357a5ca864Sbellard 1367a5ca864Sbellard struct partition_record 1377a5ca864Sbellard { 1387a5ca864Sbellard uint8_t bootable; 1397a5ca864Sbellard uint8_t start_head; 1407a5ca864Sbellard uint32_t start_cylinder; 1417a5ca864Sbellard uint8_t start_sector; 1427a5ca864Sbellard uint8_t system; 1437a5ca864Sbellard uint8_t end_head; 1447a5ca864Sbellard uint8_t end_cylinder; 1457a5ca864Sbellard uint8_t end_sector; 1467a5ca864Sbellard uint32_t start_sector_abs; 1477a5ca864Sbellard uint32_t nb_sectors_abs; 1487a5ca864Sbellard }; 1497a5ca864Sbellard 1507a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1517a5ca864Sbellard { 1527a5ca864Sbellard r->bootable = p[0]; 1537a5ca864Sbellard r->start_head = p[1]; 1547a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1557a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1567a5ca864Sbellard r->system = p[4]; 1577a5ca864Sbellard r->end_head = p[5]; 1587a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1597a5ca864Sbellard r->end_sector = p[6] & 0x3f; 160ac97393dSMax Reitz 161773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 162773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1637a5ca864Sbellard } 1647a5ca864Sbellard 1654c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1667a5ca864Sbellard off_t *offset, off_t *size) 1677a5ca864Sbellard { 1687a5ca864Sbellard struct partition_record mbr[4]; 169bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1707a5ca864Sbellard int i; 1717a5ca864Sbellard int ext_partnum = 4; 172cb7cf0e3SRyota Ozaki int ret; 1737a5ca864Sbellard 174bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 175bd31c214SEric Blake if (ret < 0) { 176a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 17785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 178cb7cf0e3SRyota Ozaki } 1797a5ca864Sbellard 1807a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 181185b4338SPaolo Bonzini return -EINVAL; 1827a5ca864Sbellard } 1837a5ca864Sbellard 1847a5ca864Sbellard for (i = 0; i < 4; i++) { 1857a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1867a5ca864Sbellard 187453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1887a5ca864Sbellard continue; 189453b07b1SMax Reitz } 1907a5ca864Sbellard 1917a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1927a5ca864Sbellard struct partition_record ext[4]; 193bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 1947a5ca864Sbellard int j; 1957a5ca864Sbellard 196bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 197bd31c214SEric Blake data1, sizeof(data1)); 198bd31c214SEric Blake if (ret < 0) { 199a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 201cb7cf0e3SRyota Ozaki } 2027a5ca864Sbellard 2037a5ca864Sbellard for (j = 0; j < 4; j++) { 2047a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 205453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2067a5ca864Sbellard continue; 207453b07b1SMax Reitz } 2087a5ca864Sbellard 2097a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2107a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2117a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2127a5ca864Sbellard return 0; 2137a5ca864Sbellard } 2147a5ca864Sbellard } 2157a5ca864Sbellard ext_partnum += 4; 2167a5ca864Sbellard } else if ((i + 1) == partition) { 2177a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2187a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2197a5ca864Sbellard return 0; 2207a5ca864Sbellard } 2217a5ca864Sbellard } 2227a5ca864Sbellard 223185b4338SPaolo Bonzini return -ENOENT; 2247a5ca864Sbellard } 2257a5ca864Sbellard 226bb345110SPaolo Bonzini static void termsig_handler(int signum) 227bb345110SPaolo Bonzini { 22823994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 229a61c6782SPaolo Bonzini qemu_notify_event(); 230bb345110SPaolo Bonzini } 231bb345110SPaolo Bonzini 232537b41f5SPaolo Bonzini 233a517e88bSPaolo Bonzini static void *show_parts(void *arg) 234cd831bd7Sths { 235a6ac2313SPaolo Bonzini char *device = arg; 236cd831bd7Sths int nbd; 237cd831bd7Sths 238cd831bd7Sths /* linux just needs an open() to trigger 239cd831bd7Sths * the partition table update 240cd831bd7Sths * but remember to load the module with max_part != 0 : 241cd831bd7Sths * modprobe nbd max_part=63 242cd831bd7Sths */ 243cd831bd7Sths nbd = open(device, O_RDWR); 244fc19f8a0SPaolo Bonzini if (nbd >= 0) { 245cd831bd7Sths close(nbd); 246cd831bd7Sths } 247a517e88bSPaolo Bonzini return NULL; 248a517e88bSPaolo Bonzini } 249a517e88bSPaolo Bonzini 250a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 251a517e88bSPaolo Bonzini { 252a6ac2313SPaolo Bonzini char *device = arg; 253a517e88bSPaolo Bonzini off_t size; 2547423f417SEric Blake uint16_t nbdflags; 255d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 256d0d6ff58SDaniel P. Berrange int fd; 257a517e88bSPaolo Bonzini int ret; 258a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2591ce52846SMax Reitz Error *local_error = NULL; 260a517e88bSPaolo Bonzini 261d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 262d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 263d0d6ff58SDaniel P. Berrange saddr, 264d0d6ff58SDaniel P. Berrange &local_error) < 0) { 26548bec07eSDaniel P. Berrange error_report_err(local_error); 266a517e88bSPaolo Bonzini goto out; 267a517e88bSPaolo Bonzini } 268a517e88bSPaolo Bonzini 2691c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 270f95910feSDaniel P. Berrange NULL, NULL, NULL, 2713f472659SMax Reitz &size, &local_error); 272fc19f8a0SPaolo Bonzini if (ret < 0) { 2731ce52846SMax Reitz if (local_error) { 27478288671SMarkus Armbruster error_report_err(local_error); 2751ce52846SMax Reitz } 2760c544d73SPaolo Bonzini goto out_socket; 277a517e88bSPaolo Bonzini } 278a517e88bSPaolo Bonzini 279a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 280fc19f8a0SPaolo Bonzini if (fd < 0) { 281a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 282b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2830c544d73SPaolo Bonzini goto out_socket; 284a6ac2313SPaolo Bonzini } 285a6ac2313SPaolo Bonzini 2861c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 287fc19f8a0SPaolo Bonzini if (ret < 0) { 2880c544d73SPaolo Bonzini goto out_fd; 289a517e88bSPaolo Bonzini } 290a517e88bSPaolo Bonzini 291a517e88bSPaolo Bonzini /* update partition table */ 292a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 293a517e88bSPaolo Bonzini 294c1f8fdc3SPaolo Bonzini if (verbose) { 295a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 296a517e88bSPaolo Bonzini device, srcpath); 297c1f8fdc3SPaolo Bonzini } else { 298c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 299c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 300c1f8fdc3SPaolo Bonzini } 301a517e88bSPaolo Bonzini 302a517e88bSPaolo Bonzini ret = nbd_client(fd); 303a517e88bSPaolo Bonzini if (ret) { 3040c544d73SPaolo Bonzini goto out_fd; 305a517e88bSPaolo Bonzini } 306a517e88bSPaolo Bonzini close(fd); 307d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 308a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 309a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 310a517e88bSPaolo Bonzini 3110c544d73SPaolo Bonzini out_fd: 3120c544d73SPaolo Bonzini close(fd); 3130c544d73SPaolo Bonzini out_socket: 314d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 315a517e88bSPaolo Bonzini out: 316a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 317a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 318cd831bd7Sths } 319cd831bd7Sths 320e4afbf4fSFam Zheng static int nbd_can_accept(void) 321a61c6782SPaolo Bonzini { 322a61c6782SPaolo Bonzini return nb_fds < shared; 323a61c6782SPaolo Bonzini } 324a61c6782SPaolo Bonzini 3257860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3267860a380SPaolo Bonzini { 3277860a380SPaolo Bonzini assert(state == TERMINATING); 3287860a380SPaolo Bonzini state = TERMINATED; 3297860a380SPaolo Bonzini } 3307860a380SPaolo Bonzini 331d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 332e4afbf4fSFam Zheng 3331743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 334a61c6782SPaolo Bonzini { 335a61c6782SPaolo Bonzini nb_fds--; 3367860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3377860a380SPaolo Bonzini state = TERMINATE; 3387860a380SPaolo Bonzini } 339d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3407860a380SPaolo Bonzini nbd_client_put(client); 341a61c6782SPaolo Bonzini } 342a61c6782SPaolo Bonzini 343d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 344a61c6782SPaolo Bonzini { 345d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 346a61c6782SPaolo Bonzini 347d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 348d0d6ff58SDaniel P. Berrange NULL); 349d0d6ff58SDaniel P. Berrange if (!cioc) { 350d0d6ff58SDaniel P. Berrange return TRUE; 3510c544d73SPaolo Bonzini } 3520c544d73SPaolo Bonzini 3537860a380SPaolo Bonzini if (state >= TERMINATE) { 354d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 355d0d6ff58SDaniel P. Berrange return TRUE; 3567860a380SPaolo Bonzini } 3577860a380SPaolo Bonzini 358a61c6782SPaolo Bonzini nb_fds++; 359d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 360f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 361145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 362d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 363a61c6782SPaolo Bonzini 364d0d6ff58SDaniel P. Berrange return TRUE; 365d0d6ff58SDaniel P. Berrange } 366d0d6ff58SDaniel P. Berrange 367d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 368e4afbf4fSFam Zheng { 369e4afbf4fSFam Zheng if (nbd_can_accept()) { 370d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 371d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 372d0d6ff58SDaniel P. Berrange G_IO_IN, 373d0d6ff58SDaniel P. Berrange nbd_accept, 374d0d6ff58SDaniel P. Berrange NULL, NULL); 375d0d6ff58SDaniel P. Berrange } 376e4afbf4fSFam Zheng } else { 377d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 378d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 379d0d6ff58SDaniel P. Berrange server_watch = -1; 380d0d6ff58SDaniel P. Berrange } 381e4afbf4fSFam Zheng } 382e4afbf4fSFam Zheng } 383e4afbf4fSFam Zheng 38448bec07eSDaniel P. Berrange 38548bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 38648bec07eSDaniel P. Berrange const char *bindto, 38748bec07eSDaniel P. Berrange const char *port) 38848bec07eSDaniel P. Berrange { 38948bec07eSDaniel P. Berrange SocketAddress *saddr; 39048bec07eSDaniel P. Berrange 39148bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 39248bec07eSDaniel P. Berrange if (sockpath) { 3932d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 39432bafa8fSEric Blake saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 39532bafa8fSEric Blake saddr->u.q_unix.data->path = g_strdup(sockpath); 39648bec07eSDaniel P. Berrange } else { 3970399293eSEric Blake InetSocketAddress *inet; 3982d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 39932bafa8fSEric Blake inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); 4000399293eSEric Blake inet->host = g_strdup(bindto); 40148bec07eSDaniel P. Berrange if (port) { 4020399293eSEric Blake inet->port = g_strdup(port); 40348bec07eSDaniel P. Berrange } else { 4040399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 40548bec07eSDaniel P. Berrange } 40648bec07eSDaniel P. Berrange } 40748bec07eSDaniel P. Berrange 40848bec07eSDaniel P. Berrange return saddr; 40948bec07eSDaniel P. Berrange } 41048bec07eSDaniel P. Berrange 41148bec07eSDaniel P. Berrange 41277c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 41377c9aaefSDaniel P. Berrange .name = "file", 41477c9aaefSDaniel P. Berrange .implied_opt_name = "file", 41577c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 41677c9aaefSDaniel P. Berrange .desc = { 41777c9aaefSDaniel P. Berrange /* no elements => accept any params */ 41877c9aaefSDaniel P. Berrange { /* end of list */ } 41977c9aaefSDaniel P. Berrange }, 42077c9aaefSDaniel P. Berrange }; 42177c9aaefSDaniel P. Berrange 4220ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4230ab3b337SDaniel P. Berrange .name = "object", 4240ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4250ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4260ab3b337SDaniel P. Berrange .desc = { 4270ab3b337SDaniel P. Berrange { } 4280ab3b337SDaniel P. Berrange }, 4290ab3b337SDaniel P. Berrange }; 4300ab3b337SDaniel P. Berrange 4310ab3b337SDaniel P. Berrange 432145614a1SDaniel P. Berrange 433145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 434145614a1SDaniel P. Berrange { 435145614a1SDaniel P. Berrange Object *obj; 436145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 437145614a1SDaniel P. Berrange 438145614a1SDaniel P. Berrange obj = object_resolve_path_component( 439145614a1SDaniel P. Berrange object_get_objects_root(), id); 440145614a1SDaniel P. Berrange if (!obj) { 441145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 442145614a1SDaniel P. Berrange id); 443145614a1SDaniel P. Berrange return NULL; 444145614a1SDaniel P. Berrange } 445145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 446145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 447145614a1SDaniel P. Berrange if (!creds) { 448145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 449145614a1SDaniel P. Berrange id); 450145614a1SDaniel P. Berrange return NULL; 451145614a1SDaniel P. Berrange } 452145614a1SDaniel P. Berrange 453145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 454145614a1SDaniel P. Berrange error_setg(errp, 455145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 456145614a1SDaniel P. Berrange return NULL; 457145614a1SDaniel P. Berrange } 458145614a1SDaniel P. Berrange object_ref(obj); 459145614a1SDaniel P. Berrange return creds; 460145614a1SDaniel P. Berrange } 461145614a1SDaniel P. Berrange 462145614a1SDaniel P. Berrange 4637a5ca864Sbellard int main(int argc, char **argv) 4647a5ca864Sbellard { 46526f54e9aSMarkus Armbruster BlockBackend *blk; 4667a5ca864Sbellard BlockDriverState *bs; 4677a5ca864Sbellard off_t dev_offset = 0; 4687423f417SEric Blake uint16_t nbdflags = 0; 469cd831bd7Sths bool disconnect = false; 4707a5ca864Sbellard const char *bindto = "0.0.0.0"; 47148bec07eSDaniel P. Berrange const char *port = NULL; 47248bec07eSDaniel P. Berrange char *sockpath = NULL; 473a6ac2313SPaolo Bonzini char *device = NULL; 4747a5ca864Sbellard off_t fd_size; 4758c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4768c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 47739ca463eSDenis V. Lunev const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:"; 4787a5ca864Sbellard struct option lopt[] = { 479aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 480aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 481aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 482aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 483aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 484aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 485aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 486aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 487aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 488aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 489aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 490aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 491aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 492aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 493aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 494aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 495aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 496aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 497aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 498aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 499aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 500aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 501aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 502aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 503aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 504aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 50539ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 506660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5077a5ca864Sbellard }; 5087a5ca864Sbellard int ch; 5097a5ca864Sbellard int opt_ind = 0; 5107a5ca864Sbellard char *end; 511f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5127a5ca864Sbellard int partition = -1; 5134fbec260SMax Reitz int ret = 0; 51439a5235cSPaolo Bonzini bool seen_cache = false; 515ded9d2d5SPaolo Bonzini bool seen_discard = false; 51639a5235cSPaolo Bonzini bool seen_aio = false; 517a517e88bSPaolo Bonzini pthread_t client_thread; 518e6b63677SDaniel P. Berrange const char *fmt = NULL; 51934b5d2c6SMax Reitz Error *local_err = NULL; 520b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5214fbec260SMax Reitz QDict *options = NULL; 5223d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 523145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 52477c9aaefSDaniel P. Berrange bool imageOpts = false; 5256effd5bfSKevin Wolf bool writethrough = true; 52639ca463eSDenis V. Lunev char *trace_file = NULL; 5277a5ca864Sbellard 528a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 529a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 530a517e88bSPaolo Bonzini */ 531bb345110SPaolo Bonzini struct sigaction sa_sigterm; 532bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 533bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 534bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 535c2297088SDaniel P. Berrange 536e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 537c2297088SDaniel P. Berrange 5380ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5390ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 54039ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 54110f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 542bb345110SPaolo Bonzini 5437a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5447a5ca864Sbellard switch (ch) { 5457a5ca864Sbellard case 's': 5462f726488Sths flags |= BDRV_O_SNAPSHOT; 5472f726488Sths break; 5482f726488Sths case 'n': 54939a5235cSPaolo Bonzini optarg = (char *) "none"; 55039a5235cSPaolo Bonzini /* fallthrough */ 55139a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 55239a5235cSPaolo Bonzini if (seen_cache) { 55385b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 55485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 55539a5235cSPaolo Bonzini } 55639a5235cSPaolo Bonzini seen_cache = true; 5576effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 55885b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 55985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 56039a5235cSPaolo Bonzini } 5617a5ca864Sbellard break; 56239a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 56339a5235cSPaolo Bonzini if (seen_aio) { 56485b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 56585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 56639a5235cSPaolo Bonzini } 56739a5235cSPaolo Bonzini seen_aio = true; 56839a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 56939a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 57039a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 57139a5235cSPaolo Bonzini /* this is the default */ 57239a5235cSPaolo Bonzini } else { 57385b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 57485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 57539a5235cSPaolo Bonzini } 57639a5235cSPaolo Bonzini break; 577ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 578ded9d2d5SPaolo Bonzini if (seen_discard) { 57985b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 58085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 581ded9d2d5SPaolo Bonzini } 582ded9d2d5SPaolo Bonzini seen_discard = true; 583ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 58485b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 58585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 586ded9d2d5SPaolo Bonzini } 587ded9d2d5SPaolo Bonzini break; 588b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 589b3838a40SPeter Lieven detect_zeroes = 590b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 591b3838a40SPeter Lieven optarg, 5927fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 593b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 594b3838a40SPeter Lieven &local_err); 595b3838a40SPeter Lieven if (local_err) { 596c29b77f9SMarkus Armbruster error_reportf_err(local_err, 597c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 59885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 599b3838a40SPeter Lieven } 600b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 601b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 60285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 603b3838a40SPeter Lieven "without setting discard operation to unmap"); 60485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 605b3838a40SPeter Lieven } 606b3838a40SPeter Lieven break; 6077a5ca864Sbellard case 'b': 6087a5ca864Sbellard bindto = optarg; 6097a5ca864Sbellard break; 6107a5ca864Sbellard case 'p': 61148bec07eSDaniel P. Berrange port = optarg; 6127a5ca864Sbellard break; 6137a5ca864Sbellard case 'o': 6147a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6157a5ca864Sbellard if (*end) { 61685b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 61785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6187a5ca864Sbellard } 6197a5ca864Sbellard if (dev_offset < 0) { 62085b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 62185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6227a5ca864Sbellard } 6237a5ca864Sbellard break; 6248c116b0eSWenchao Xia case 'l': 6258c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 62670b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 62770b94331SMarkus Armbruster optarg, false); 6288c116b0eSWenchao Xia if (!sn_opts) { 62985b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6308c116b0eSWenchao Xia optarg); 63185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6328c116b0eSWenchao Xia } 6338c116b0eSWenchao Xia } else { 6348c116b0eSWenchao Xia sn_id_or_name = optarg; 6358c116b0eSWenchao Xia } 6368c116b0eSWenchao Xia /* fall through */ 6377a5ca864Sbellard case 'r': 638b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 63907108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6407a5ca864Sbellard break; 6417a5ca864Sbellard case 'P': 6427a5ca864Sbellard partition = strtol(optarg, &end, 0); 643713cc671SPeter Lieven if (*end) { 64485b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 64585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 646713cc671SPeter Lieven } 647713cc671SPeter Lieven if (partition < 1 || partition > 8) { 64885b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 64985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 650713cc671SPeter Lieven } 6517a5ca864Sbellard break; 652cd831bd7Sths case 'k': 653b32f6c28SPaolo Bonzini sockpath = optarg; 654713cc671SPeter Lieven if (sockpath[0] != '/') { 6559af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 65685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 657713cc671SPeter Lieven } 658cd831bd7Sths break; 659cd831bd7Sths case 'd': 660cd831bd7Sths disconnect = true; 661cd831bd7Sths break; 662cd831bd7Sths case 'c': 663cd831bd7Sths device = optarg; 664cd831bd7Sths break; 6653b05a8e9Sths case 'e': 6663b05a8e9Sths shared = strtol(optarg, &end, 0); 6673b05a8e9Sths if (*end) { 66885b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 66985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6703b05a8e9Sths } 6713b05a8e9Sths if (shared < 1) { 6729af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 67385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6743b05a8e9Sths } 6753b05a8e9Sths break; 676e6b63677SDaniel P. Berrange case 'f': 677e6b63677SDaniel P. Berrange fmt = optarg; 678e6b63677SDaniel P. Berrange break; 67975818250Sths case 't': 68075818250Sths persistent = 1; 68175818250Sths break; 6823d4b2f9cSDaniel P. Berrange case 'x': 6833d4b2f9cSDaniel P. Berrange export_name = optarg; 6843d4b2f9cSDaniel P. Berrange break; 6857a5ca864Sbellard case 'v': 6867a5ca864Sbellard verbose = 1; 6877a5ca864Sbellard break; 6887a5ca864Sbellard case 'V': 6897a5ca864Sbellard version(argv[0]); 6907a5ca864Sbellard exit(0); 6917a5ca864Sbellard break; 6927a5ca864Sbellard case 'h': 6937a5ca864Sbellard usage(argv[0]); 6947a5ca864Sbellard exit(0); 6957a5ca864Sbellard break; 6967a5ca864Sbellard case '?': 69785b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 69885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6990ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7000ab3b337SDaniel P. Berrange QemuOpts *opts; 7010ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7020ab3b337SDaniel P. Berrange optarg, true); 7030ab3b337SDaniel P. Berrange if (!opts) { 7040ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7050ab3b337SDaniel P. Berrange } 7060ab3b337SDaniel P. Berrange } break; 707145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 708145614a1SDaniel P. Berrange tlscredsid = optarg; 709145614a1SDaniel P. Berrange break; 71077c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 71177c9aaefSDaniel P. Berrange imageOpts = true; 71277c9aaefSDaniel P. Berrange break; 71339ca463eSDenis V. Lunev case 'T': 71439ca463eSDenis V. Lunev g_free(trace_file); 71539ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 71639ca463eSDenis V. Lunev break; 7177a5ca864Sbellard } 7187a5ca864Sbellard } 7197a5ca864Sbellard 7207a5ca864Sbellard if ((argc - optind) != 1) { 721433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 722433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 72385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7247a5ca864Sbellard } 7257a5ca864Sbellard 7260ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7270ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 72851b9b478SMarkus Armbruster NULL, NULL)) { 7290ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7300ab3b337SDaniel P. Berrange } 7310ab3b337SDaniel P. Berrange 73239ca463eSDenis V. Lunev if (!trace_init_backends()) { 73339ca463eSDenis V. Lunev exit(1); 73439ca463eSDenis V. Lunev } 73539ca463eSDenis V. Lunev trace_init_file(trace_file); 73639ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 73739ca463eSDenis V. Lunev 738145614a1SDaniel P. Berrange if (tlscredsid) { 739145614a1SDaniel P. Berrange if (sockpath) { 740145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 741145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 742145614a1SDaniel P. Berrange } 743145614a1SDaniel P. Berrange if (device) { 744145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 745145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 746145614a1SDaniel P. Berrange } 747145614a1SDaniel P. Berrange if (!export_name) { 748145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 749145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 750145614a1SDaniel P. Berrange export_name = ""; 751145614a1SDaniel P. Berrange } 752145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 753145614a1SDaniel P. Berrange if (local_err) { 754145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 755145614a1SDaniel P. Berrange error_get_pretty(local_err)); 756145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 757145614a1SDaniel P. Berrange } 758145614a1SDaniel P. Berrange } 759145614a1SDaniel P. Berrange 760cd831bd7Sths if (disconnect) { 761d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 762d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 76385b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 76485b01e09SMarkus Armbruster strerror(errno)); 76585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 766fc19f8a0SPaolo Bonzini } 767d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 768cd831bd7Sths 769d0d6ff58SDaniel P. Berrange close(nbdfd); 770cd831bd7Sths 771cd831bd7Sths printf("%s disconnected\n", argv[optind]); 772cd831bd7Sths 773cd831bd7Sths return 0; 774cd831bd7Sths } 775cd831bd7Sths 776c1f8fdc3SPaolo Bonzini if (device && !verbose) { 777c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 778c1f8fdc3SPaolo Bonzini pid_t pid; 779c1f8fdc3SPaolo Bonzini int ret; 780c1f8fdc3SPaolo Bonzini 781fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 78285b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 78385b01e09SMarkus Armbruster strerror(errno)); 78485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 785c1f8fdc3SPaolo Bonzini } 786c1f8fdc3SPaolo Bonzini 787c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 788c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 789c1f8fdc3SPaolo Bonzini */ 790c1f8fdc3SPaolo Bonzini pid = fork(); 79170d4739eSMax Reitz if (pid < 0) { 79285b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 79385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 79470d4739eSMax Reitz } else if (pid == 0) { 795c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 7969faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 797c1f8fdc3SPaolo Bonzini 798c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 799c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 800fc19f8a0SPaolo Bonzini if (ret < 0) { 80185b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 80285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 803c1f8fdc3SPaolo Bonzini } 804c1f8fdc3SPaolo Bonzini 805c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 806c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 807c1f8fdc3SPaolo Bonzini } else { 808c1f8fdc3SPaolo Bonzini bool errors = false; 809c1f8fdc3SPaolo Bonzini char *buf; 810c1f8fdc3SPaolo Bonzini 811c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 812c1f8fdc3SPaolo Bonzini * it closes the pipe. 813c1f8fdc3SPaolo Bonzini */ 814c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 815c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 816c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 817c1f8fdc3SPaolo Bonzini errors = true; 818c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 819fc19f8a0SPaolo Bonzini if (ret < 0) { 820c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 821c1f8fdc3SPaolo Bonzini } 822c1f8fdc3SPaolo Bonzini } 823fc19f8a0SPaolo Bonzini if (ret < 0) { 82485b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 82585b01e09SMarkus Armbruster strerror(errno)); 82685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 827c1f8fdc3SPaolo Bonzini } 828c1f8fdc3SPaolo Bonzini 829c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 830c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 831c1f8fdc3SPaolo Bonzini */ 832c1f8fdc3SPaolo Bonzini exit(errors); 833c1f8fdc3SPaolo Bonzini } 834c1f8fdc3SPaolo Bonzini } 835c1f8fdc3SPaolo Bonzini 836a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 837b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 838b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 839cd831bd7Sths } 840cd831bd7Sths 84148bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 84248bec07eSDaniel P. Berrange 8432f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 844565f65d2SMarkus Armbruster error_report_err(local_err); 8452f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8462f78e491SChrysostomos Nanakos } 847802ddc37SPaolo Bonzini bdrv_init(); 848802ddc37SPaolo Bonzini atexit(bdrv_close_all); 849802ddc37SPaolo Bonzini 85077c9aaefSDaniel P. Berrange srcpath = argv[optind]; 85177c9aaefSDaniel P. Berrange if (imageOpts) { 85277c9aaefSDaniel P. Berrange QemuOpts *opts; 85377c9aaefSDaniel P. Berrange if (fmt) { 85477c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 85577c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 85677c9aaefSDaniel P. Berrange } 85777c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 85877c9aaefSDaniel P. Berrange if (!opts) { 85977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 86077c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 86177c9aaefSDaniel P. Berrange } 86277c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 86377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 864efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 86577c9aaefSDaniel P. Berrange } else { 866e6b63677SDaniel P. Berrange if (fmt) { 8674fbec260SMax Reitz options = qdict_new(); 8684fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 869e6b63677SDaniel P. Berrange } 870efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 87177c9aaefSDaniel P. Berrange } 87277c9aaefSDaniel P. Berrange 8734fbec260SMax Reitz if (!blk) { 874c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 875c29b77f9SMarkus Armbruster argv[optind]); 87685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 877802ddc37SPaolo Bonzini } 8784fbec260SMax Reitz bs = blk_bs(blk); 879802ddc37SPaolo Bonzini 8806effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 8816effd5bfSKevin Wolf 8828c116b0eSWenchao Xia if (sn_opts) { 8838c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 8848c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 8858c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 8868c116b0eSWenchao Xia &local_err); 8878c116b0eSWenchao Xia } else if (sn_id_or_name) { 8888c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 8898c116b0eSWenchao Xia &local_err); 8908c116b0eSWenchao Xia } 8918c116b0eSWenchao Xia if (ret < 0) { 892c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 89385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 8948c116b0eSWenchao Xia } 8958c116b0eSWenchao Xia 896b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 8974c58e80aSMax Reitz fd_size = blk_getlength(blk); 89898f44bbeSMax Reitz if (fd_size < 0) { 89985b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 90098f44bbeSMax Reitz strerror(-fd_size)); 90185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 90298f44bbeSMax Reitz } 903802ddc37SPaolo Bonzini 904*e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 905*e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 906*e424b655STomáš Golembiovský "(%lld)", 907*e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 908*e424b655STomáš Golembiovský exit(EXIT_FAILURE); 909*e424b655STomáš Golembiovský } 910*e424b655STomáš Golembiovský fd_size -= dev_offset; 911*e424b655STomáš Golembiovský 912185b4338SPaolo Bonzini if (partition != -1) { 9134c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 914185b4338SPaolo Bonzini if (ret < 0) { 91585b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 916a4699e55SMarkus Armbruster strerror(-ret)); 91785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 918802ddc37SPaolo Bonzini } 919185b4338SPaolo Bonzini } 920802ddc37SPaolo Bonzini 921cd7fca95SKevin Wolf exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, 922cd7fca95SKevin Wolf writethrough, NULL, &local_err); 92398f44bbeSMax Reitz if (!exp) { 9244fffeb5eSMarkus Armbruster error_report_err(local_err); 92585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 92698f44bbeSMax Reitz } 9273d4b2f9cSDaniel P. Berrange if (export_name) { 9283d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 9293d4b2f9cSDaniel P. Berrange newproto = true; 9303d4b2f9cSDaniel P. Berrange } 9313b05a8e9Sths 932d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 933d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 934d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 93548bec07eSDaniel P. Berrange error_report_err(local_err); 9367a5ca864Sbellard return 1; 937a61c6782SPaolo Bonzini } 938f1ef5555SPaolo Bonzini 939f1ef5555SPaolo Bonzini if (device) { 940f1ef5555SPaolo Bonzini int ret; 941f1ef5555SPaolo Bonzini 942a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 943f1ef5555SPaolo Bonzini if (ret != 0) { 94485b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 94585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 946f1ef5555SPaolo Bonzini } 947f1ef5555SPaolo Bonzini } else { 948f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 949f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 950f1ef5555SPaolo Bonzini } 951f1ef5555SPaolo Bonzini 952d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9537a5ca864Sbellard 9549faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9559faf31b6SMichael Tokarev * to free any busy filesystems */ 9569faf31b6SMichael Tokarev if (chdir("/") < 0) { 95785b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 95885b01e09SMarkus Armbruster strerror(errno)); 95985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9609faf31b6SMichael Tokarev } 9619faf31b6SMichael Tokarev 9627860a380SPaolo Bonzini state = RUNNING; 9633b05a8e9Sths do { 964a61c6782SPaolo Bonzini main_loop_wait(false); 9657860a380SPaolo Bonzini if (state == TERMINATE) { 9667860a380SPaolo Bonzini state = TERMINATING; 967af49bbbeSPaolo Bonzini nbd_export_close(exp); 9682c8d9f06SPaolo Bonzini nbd_export_put(exp); 9697860a380SPaolo Bonzini exp = NULL; 9707860a380SPaolo Bonzini } 9717860a380SPaolo Bonzini } while (state != TERMINATED); 9722c8d9f06SPaolo Bonzini 97326f54e9aSMarkus Armbruster blk_unref(blk); 974b32f6c28SPaolo Bonzini if (sockpath) { 975b32f6c28SPaolo Bonzini unlink(sockpath); 976b32f6c28SPaolo Bonzini } 9777a5ca864Sbellard 9788c116b0eSWenchao Xia qemu_opts_del(sn_opts); 9798c116b0eSWenchao Xia 980a517e88bSPaolo Bonzini if (device) { 981a517e88bSPaolo Bonzini void *ret; 982a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 983a517e88bSPaolo Bonzini exit(ret != NULL); 984a517e88bSPaolo Bonzini } else { 985a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 986a517e88bSPaolo Bonzini } 9877a5ca864Sbellard } 988