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 51ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 527a5ca864Sbellard 53bd31c214SEric Blake #define MBR_SIZE 512 54bd31c214SEric Blake 55af49bbbeSPaolo Bonzini static NBDExport *exp; 563d4b2f9cSDaniel P. Berrange static bool newproto; 57b1d8e52eSblueswir1 static int verbose; 58a517e88bSPaolo Bonzini static char *srcpath; 5948bec07eSDaniel P. Berrange static SocketAddress *saddr; 607860a380SPaolo Bonzini static int persistent = 0; 617860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 62a61c6782SPaolo Bonzini static int shared = 1; 63a61c6782SPaolo Bonzini static int nb_fds; 64d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 65d0d6ff58SDaniel P. Berrange static int server_watch = -1; 66145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 677a5ca864Sbellard 687a5ca864Sbellard static void usage(const char *name) 697a5ca864Sbellard { 70b033cd86SPaolo Bonzini (printf) ( 717a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 727a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 737a5ca864Sbellard "\n" 747a5ca864Sbellard " -h, --help display this help and exit\n" 757a5ca864Sbellard " -V, --version output version information and exit\n" 767a5ca864Sbellard "\n" 77b033cd86SPaolo Bonzini "Connection properties:\n" 78b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 79b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 80b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 81b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 82b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 83b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 84b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 85332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 86*b1a75b33SEric Blake " -D, --description=TEXT with -x, also export a human-readable description\n" 87b033cd86SPaolo Bonzini "\n" 88b033cd86SPaolo Bonzini "Exposing part of the image:\n" 89b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 90b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 91b033cd86SPaolo Bonzini "\n" 920ab3b337SDaniel P. Berrange "General purpose options:\n" 930ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 940ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 9539ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 9639ca463eSDenis V. Lunev " specify tracing options\n" 97ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 98ffb31e1dSMax Reitz " once the server is running\n" 99b033cd86SPaolo Bonzini #ifdef __linux__ 100b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 101b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 102b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 103b033cd86SPaolo Bonzini "\n" 104b033cd86SPaolo Bonzini #endif 105b033cd86SPaolo Bonzini "\n" 106b033cd86SPaolo Bonzini "Block device options:\n" 1074323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 108b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1098c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1108c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1118c116b0eSWenchao Xia " the temporary one\n" 1128c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1138c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1148c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1158c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1168c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 117b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 11839a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 11939a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 120b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1216883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 12277c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 123b033cd86SPaolo Bonzini "\n" 124b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 125c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1267a5ca864Sbellard } 1277a5ca864Sbellard 1287a5ca864Sbellard static void version(const char *name) 1297a5ca864Sbellard { 1307a5ca864Sbellard printf( 131315bc7aaSths "%s version 0.0.1\n" 1327a5ca864Sbellard "Written by Anthony Liguori.\n" 1337a5ca864Sbellard "\n" 1347a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1357a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1367a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 137315bc7aaSths , name); 1387a5ca864Sbellard } 1397a5ca864Sbellard 1407a5ca864Sbellard struct partition_record 1417a5ca864Sbellard { 1427a5ca864Sbellard uint8_t bootable; 1437a5ca864Sbellard uint8_t start_head; 1447a5ca864Sbellard uint32_t start_cylinder; 1457a5ca864Sbellard uint8_t start_sector; 1467a5ca864Sbellard uint8_t system; 1477a5ca864Sbellard uint8_t end_head; 1487a5ca864Sbellard uint8_t end_cylinder; 1497a5ca864Sbellard uint8_t end_sector; 1507a5ca864Sbellard uint32_t start_sector_abs; 1517a5ca864Sbellard uint32_t nb_sectors_abs; 1527a5ca864Sbellard }; 1537a5ca864Sbellard 1547a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1557a5ca864Sbellard { 1567a5ca864Sbellard r->bootable = p[0]; 1577a5ca864Sbellard r->start_head = p[1]; 1587a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1597a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1607a5ca864Sbellard r->system = p[4]; 1617a5ca864Sbellard r->end_head = p[5]; 1627a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1637a5ca864Sbellard r->end_sector = p[6] & 0x3f; 164ac97393dSMax Reitz 165773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 166773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1677a5ca864Sbellard } 1687a5ca864Sbellard 1694c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1707a5ca864Sbellard off_t *offset, off_t *size) 1717a5ca864Sbellard { 1727a5ca864Sbellard struct partition_record mbr[4]; 173bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1747a5ca864Sbellard int i; 1757a5ca864Sbellard int ext_partnum = 4; 176cb7cf0e3SRyota Ozaki int ret; 1777a5ca864Sbellard 178bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 179bd31c214SEric Blake if (ret < 0) { 180a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 182cb7cf0e3SRyota Ozaki } 1837a5ca864Sbellard 1847a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 185185b4338SPaolo Bonzini return -EINVAL; 1867a5ca864Sbellard } 1877a5ca864Sbellard 1887a5ca864Sbellard for (i = 0; i < 4; i++) { 1897a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1907a5ca864Sbellard 191453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1927a5ca864Sbellard continue; 193453b07b1SMax Reitz } 1947a5ca864Sbellard 1957a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1967a5ca864Sbellard struct partition_record ext[4]; 197bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 1987a5ca864Sbellard int j; 1997a5ca864Sbellard 200bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 201bd31c214SEric Blake data1, sizeof(data1)); 202bd31c214SEric Blake if (ret < 0) { 203a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 205cb7cf0e3SRyota Ozaki } 2067a5ca864Sbellard 2077a5ca864Sbellard for (j = 0; j < 4; j++) { 2087a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 209453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2107a5ca864Sbellard continue; 211453b07b1SMax Reitz } 2127a5ca864Sbellard 2137a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2147a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2157a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2167a5ca864Sbellard return 0; 2177a5ca864Sbellard } 2187a5ca864Sbellard } 2197a5ca864Sbellard ext_partnum += 4; 2207a5ca864Sbellard } else if ((i + 1) == partition) { 2217a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2227a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2237a5ca864Sbellard return 0; 2247a5ca864Sbellard } 2257a5ca864Sbellard } 2267a5ca864Sbellard 227185b4338SPaolo Bonzini return -ENOENT; 2287a5ca864Sbellard } 2297a5ca864Sbellard 230bb345110SPaolo Bonzini static void termsig_handler(int signum) 231bb345110SPaolo Bonzini { 23223994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 233a61c6782SPaolo Bonzini qemu_notify_event(); 234bb345110SPaolo Bonzini } 235bb345110SPaolo Bonzini 236537b41f5SPaolo Bonzini 237a517e88bSPaolo Bonzini static void *show_parts(void *arg) 238cd831bd7Sths { 239a6ac2313SPaolo Bonzini char *device = arg; 240cd831bd7Sths int nbd; 241cd831bd7Sths 242cd831bd7Sths /* linux just needs an open() to trigger 243cd831bd7Sths * the partition table update 244cd831bd7Sths * but remember to load the module with max_part != 0 : 245cd831bd7Sths * modprobe nbd max_part=63 246cd831bd7Sths */ 247cd831bd7Sths nbd = open(device, O_RDWR); 248fc19f8a0SPaolo Bonzini if (nbd >= 0) { 249cd831bd7Sths close(nbd); 250cd831bd7Sths } 251a517e88bSPaolo Bonzini return NULL; 252a517e88bSPaolo Bonzini } 253a517e88bSPaolo Bonzini 254a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 255a517e88bSPaolo Bonzini { 256a6ac2313SPaolo Bonzini char *device = arg; 257a517e88bSPaolo Bonzini off_t size; 2587423f417SEric Blake uint16_t nbdflags; 259d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 260d0d6ff58SDaniel P. Berrange int fd; 261a517e88bSPaolo Bonzini int ret; 262a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2631ce52846SMax Reitz Error *local_error = NULL; 264a517e88bSPaolo Bonzini 265d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 266d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 267d0d6ff58SDaniel P. Berrange saddr, 268d0d6ff58SDaniel P. Berrange &local_error) < 0) { 26948bec07eSDaniel P. Berrange error_report_err(local_error); 270a517e88bSPaolo Bonzini goto out; 271a517e88bSPaolo Bonzini } 272a517e88bSPaolo Bonzini 2731c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 274f95910feSDaniel P. Berrange NULL, NULL, NULL, 2753f472659SMax Reitz &size, &local_error); 276fc19f8a0SPaolo Bonzini if (ret < 0) { 2771ce52846SMax Reitz if (local_error) { 27878288671SMarkus Armbruster error_report_err(local_error); 2791ce52846SMax Reitz } 2800c544d73SPaolo Bonzini goto out_socket; 281a517e88bSPaolo Bonzini } 282a517e88bSPaolo Bonzini 283a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 284fc19f8a0SPaolo Bonzini if (fd < 0) { 285a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 286b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2870c544d73SPaolo Bonzini goto out_socket; 288a6ac2313SPaolo Bonzini } 289a6ac2313SPaolo Bonzini 2901c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 291fc19f8a0SPaolo Bonzini if (ret < 0) { 2920c544d73SPaolo Bonzini goto out_fd; 293a517e88bSPaolo Bonzini } 294a517e88bSPaolo Bonzini 295a517e88bSPaolo Bonzini /* update partition table */ 296a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 297a517e88bSPaolo Bonzini 298c1f8fdc3SPaolo Bonzini if (verbose) { 299a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 300a517e88bSPaolo Bonzini device, srcpath); 301c1f8fdc3SPaolo Bonzini } else { 302c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 303c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 304c1f8fdc3SPaolo Bonzini } 305a517e88bSPaolo Bonzini 306a517e88bSPaolo Bonzini ret = nbd_client(fd); 307a517e88bSPaolo Bonzini if (ret) { 3080c544d73SPaolo Bonzini goto out_fd; 309a517e88bSPaolo Bonzini } 310a517e88bSPaolo Bonzini close(fd); 311d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 312a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 313a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 314a517e88bSPaolo Bonzini 3150c544d73SPaolo Bonzini out_fd: 3160c544d73SPaolo Bonzini close(fd); 3170c544d73SPaolo Bonzini out_socket: 318d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 319a517e88bSPaolo Bonzini out: 320a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 321a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 322cd831bd7Sths } 323cd831bd7Sths 324e4afbf4fSFam Zheng static int nbd_can_accept(void) 325a61c6782SPaolo Bonzini { 326a61c6782SPaolo Bonzini return nb_fds < shared; 327a61c6782SPaolo Bonzini } 328a61c6782SPaolo Bonzini 3297860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3307860a380SPaolo Bonzini { 3317860a380SPaolo Bonzini assert(state == TERMINATING); 3327860a380SPaolo Bonzini state = TERMINATED; 3337860a380SPaolo Bonzini } 3347860a380SPaolo Bonzini 335d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 336e4afbf4fSFam Zheng 3371743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 338a61c6782SPaolo Bonzini { 339a61c6782SPaolo Bonzini nb_fds--; 3407860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3417860a380SPaolo Bonzini state = TERMINATE; 3427860a380SPaolo Bonzini } 343d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3447860a380SPaolo Bonzini nbd_client_put(client); 345a61c6782SPaolo Bonzini } 346a61c6782SPaolo Bonzini 347d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 348a61c6782SPaolo Bonzini { 349d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 350a61c6782SPaolo Bonzini 351d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 352d0d6ff58SDaniel P. Berrange NULL); 353d0d6ff58SDaniel P. Berrange if (!cioc) { 354d0d6ff58SDaniel P. Berrange return TRUE; 3550c544d73SPaolo Bonzini } 3560c544d73SPaolo Bonzini 3577860a380SPaolo Bonzini if (state >= TERMINATE) { 358d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 359d0d6ff58SDaniel P. Berrange return TRUE; 3607860a380SPaolo Bonzini } 3617860a380SPaolo Bonzini 362a61c6782SPaolo Bonzini nb_fds++; 363d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 364f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 365145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 366d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 367a61c6782SPaolo Bonzini 368d0d6ff58SDaniel P. Berrange return TRUE; 369d0d6ff58SDaniel P. Berrange } 370d0d6ff58SDaniel P. Berrange 371d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 372e4afbf4fSFam Zheng { 373e4afbf4fSFam Zheng if (nbd_can_accept()) { 374d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 375d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 376d0d6ff58SDaniel P. Berrange G_IO_IN, 377d0d6ff58SDaniel P. Berrange nbd_accept, 378d0d6ff58SDaniel P. Berrange NULL, NULL); 379d0d6ff58SDaniel P. Berrange } 380e4afbf4fSFam Zheng } else { 381d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 382d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 383d0d6ff58SDaniel P. Berrange server_watch = -1; 384d0d6ff58SDaniel P. Berrange } 385e4afbf4fSFam Zheng } 386e4afbf4fSFam Zheng } 387e4afbf4fSFam Zheng 38848bec07eSDaniel P. Berrange 38948bec07eSDaniel P. Berrange static SocketAddress *nbd_build_socket_address(const char *sockpath, 39048bec07eSDaniel P. Berrange const char *bindto, 39148bec07eSDaniel P. Berrange const char *port) 39248bec07eSDaniel P. Berrange { 39348bec07eSDaniel P. Berrange SocketAddress *saddr; 39448bec07eSDaniel P. Berrange 39548bec07eSDaniel P. Berrange saddr = g_new0(SocketAddress, 1); 39648bec07eSDaniel P. Berrange if (sockpath) { 3972d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_UNIX; 39832bafa8fSEric Blake saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 39932bafa8fSEric Blake saddr->u.q_unix.data->path = g_strdup(sockpath); 40048bec07eSDaniel P. Berrange } else { 4010399293eSEric Blake InetSocketAddress *inet; 4022d32addaSEric Blake saddr->type = SOCKET_ADDRESS_KIND_INET; 40332bafa8fSEric Blake inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); 4040399293eSEric Blake inet->host = g_strdup(bindto); 40548bec07eSDaniel P. Berrange if (port) { 4060399293eSEric Blake inet->port = g_strdup(port); 40748bec07eSDaniel P. Berrange } else { 4080399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 40948bec07eSDaniel P. Berrange } 41048bec07eSDaniel P. Berrange } 41148bec07eSDaniel P. Berrange 41248bec07eSDaniel P. Berrange return saddr; 41348bec07eSDaniel P. Berrange } 41448bec07eSDaniel P. Berrange 41548bec07eSDaniel P. Berrange 41677c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 41777c9aaefSDaniel P. Berrange .name = "file", 41877c9aaefSDaniel P. Berrange .implied_opt_name = "file", 41977c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 42077c9aaefSDaniel P. Berrange .desc = { 42177c9aaefSDaniel P. Berrange /* no elements => accept any params */ 42277c9aaefSDaniel P. Berrange { /* end of list */ } 42377c9aaefSDaniel P. Berrange }, 42477c9aaefSDaniel P. Berrange }; 42577c9aaefSDaniel P. Berrange 4260ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4270ab3b337SDaniel P. Berrange .name = "object", 4280ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4290ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4300ab3b337SDaniel P. Berrange .desc = { 4310ab3b337SDaniel P. Berrange { } 4320ab3b337SDaniel P. Berrange }, 4330ab3b337SDaniel P. Berrange }; 4340ab3b337SDaniel P. Berrange 4350ab3b337SDaniel P. Berrange 436145614a1SDaniel P. Berrange 437145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 438145614a1SDaniel P. Berrange { 439145614a1SDaniel P. Berrange Object *obj; 440145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 441145614a1SDaniel P. Berrange 442145614a1SDaniel P. Berrange obj = object_resolve_path_component( 443145614a1SDaniel P. Berrange object_get_objects_root(), id); 444145614a1SDaniel P. Berrange if (!obj) { 445145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 446145614a1SDaniel P. Berrange id); 447145614a1SDaniel P. Berrange return NULL; 448145614a1SDaniel P. Berrange } 449145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 450145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 451145614a1SDaniel P. Berrange if (!creds) { 452145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 453145614a1SDaniel P. Berrange id); 454145614a1SDaniel P. Berrange return NULL; 455145614a1SDaniel P. Berrange } 456145614a1SDaniel P. Berrange 457145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 458145614a1SDaniel P. Berrange error_setg(errp, 459145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 460145614a1SDaniel P. Berrange return NULL; 461145614a1SDaniel P. Berrange } 462145614a1SDaniel P. Berrange object_ref(obj); 463145614a1SDaniel P. Berrange return creds; 464145614a1SDaniel P. Berrange } 465145614a1SDaniel P. Berrange 466145614a1SDaniel P. Berrange 4677a5ca864Sbellard int main(int argc, char **argv) 4687a5ca864Sbellard { 46926f54e9aSMarkus Armbruster BlockBackend *blk; 4707a5ca864Sbellard BlockDriverState *bs; 4717a5ca864Sbellard off_t dev_offset = 0; 4727423f417SEric Blake uint16_t nbdflags = 0; 473cd831bd7Sths bool disconnect = false; 4747a5ca864Sbellard const char *bindto = "0.0.0.0"; 47548bec07eSDaniel P. Berrange const char *port = NULL; 47648bec07eSDaniel P. Berrange char *sockpath = NULL; 477a6ac2313SPaolo Bonzini char *device = NULL; 4787a5ca864Sbellard off_t fd_size; 4798c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 4808c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 481*b1a75b33SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:"; 4827a5ca864Sbellard struct option lopt[] = { 483aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 484aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 485aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 486aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 487aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 488aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 489aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 490aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 491aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 492aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 493aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 494aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 495aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 496aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 497aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 498aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 499aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 500aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 501aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 502aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 503aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 504aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 505aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 506aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 507*b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 508aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 509aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 51039ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 511ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 512660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5137a5ca864Sbellard }; 5147a5ca864Sbellard int ch; 5157a5ca864Sbellard int opt_ind = 0; 5167a5ca864Sbellard char *end; 517f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5187a5ca864Sbellard int partition = -1; 5194fbec260SMax Reitz int ret = 0; 52039a5235cSPaolo Bonzini bool seen_cache = false; 521ded9d2d5SPaolo Bonzini bool seen_discard = false; 52239a5235cSPaolo Bonzini bool seen_aio = false; 523a517e88bSPaolo Bonzini pthread_t client_thread; 524e6b63677SDaniel P. Berrange const char *fmt = NULL; 52534b5d2c6SMax Reitz Error *local_err = NULL; 526b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5274fbec260SMax Reitz QDict *options = NULL; 5283d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 529*b1a75b33SEric Blake const char *export_description = NULL; 530145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 53177c9aaefSDaniel P. Berrange bool imageOpts = false; 5326effd5bfSKevin Wolf bool writethrough = true; 53339ca463eSDenis V. Lunev char *trace_file = NULL; 534ffb31e1dSMax Reitz bool fork_process = false; 535ffb31e1dSMax Reitz int old_stderr = -1; 5367a5ca864Sbellard 537a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 538a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 539a517e88bSPaolo Bonzini */ 540bb345110SPaolo Bonzini struct sigaction sa_sigterm; 541bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 542bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 543bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 544c2297088SDaniel P. Berrange 545fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 546e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 547c2297088SDaniel P. Berrange 5480ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5490ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 55039ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 55110f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 552bb345110SPaolo Bonzini 5537a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5547a5ca864Sbellard switch (ch) { 5557a5ca864Sbellard case 's': 5562f726488Sths flags |= BDRV_O_SNAPSHOT; 5572f726488Sths break; 5582f726488Sths case 'n': 55939a5235cSPaolo Bonzini optarg = (char *) "none"; 56039a5235cSPaolo Bonzini /* fallthrough */ 56139a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 56239a5235cSPaolo Bonzini if (seen_cache) { 56385b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 56485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 56539a5235cSPaolo Bonzini } 56639a5235cSPaolo Bonzini seen_cache = true; 5676effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 56885b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 56985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 57039a5235cSPaolo Bonzini } 5717a5ca864Sbellard break; 57239a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 57339a5235cSPaolo Bonzini if (seen_aio) { 57485b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 57585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 57639a5235cSPaolo Bonzini } 57739a5235cSPaolo Bonzini seen_aio = true; 57839a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 57939a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 58039a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 58139a5235cSPaolo Bonzini /* this is the default */ 58239a5235cSPaolo Bonzini } else { 58385b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 58485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 58539a5235cSPaolo Bonzini } 58639a5235cSPaolo Bonzini break; 587ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 588ded9d2d5SPaolo Bonzini if (seen_discard) { 58985b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 59085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 591ded9d2d5SPaolo Bonzini } 592ded9d2d5SPaolo Bonzini seen_discard = true; 593ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 59485b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 59585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 596ded9d2d5SPaolo Bonzini } 597ded9d2d5SPaolo Bonzini break; 598b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 599b3838a40SPeter Lieven detect_zeroes = 600b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 601b3838a40SPeter Lieven optarg, 6027fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 603b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 604b3838a40SPeter Lieven &local_err); 605b3838a40SPeter Lieven if (local_err) { 606c29b77f9SMarkus Armbruster error_reportf_err(local_err, 607c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 60885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 609b3838a40SPeter Lieven } 610b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 611b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 61285b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 613b3838a40SPeter Lieven "without setting discard operation to unmap"); 61485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 615b3838a40SPeter Lieven } 616b3838a40SPeter Lieven break; 6177a5ca864Sbellard case 'b': 6187a5ca864Sbellard bindto = optarg; 6197a5ca864Sbellard break; 6207a5ca864Sbellard case 'p': 62148bec07eSDaniel P. Berrange port = optarg; 6227a5ca864Sbellard break; 6237a5ca864Sbellard case 'o': 6247a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6257a5ca864Sbellard if (*end) { 62685b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 62785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6287a5ca864Sbellard } 6297a5ca864Sbellard if (dev_offset < 0) { 63085b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 63185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6327a5ca864Sbellard } 6337a5ca864Sbellard break; 6348c116b0eSWenchao Xia case 'l': 6358c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 63670b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 63770b94331SMarkus Armbruster optarg, false); 6388c116b0eSWenchao Xia if (!sn_opts) { 63985b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6408c116b0eSWenchao Xia optarg); 64185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6428c116b0eSWenchao Xia } 6438c116b0eSWenchao Xia } else { 6448c116b0eSWenchao Xia sn_id_or_name = optarg; 6458c116b0eSWenchao Xia } 6468c116b0eSWenchao Xia /* fall through */ 6477a5ca864Sbellard case 'r': 648b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 64907108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6507a5ca864Sbellard break; 6517a5ca864Sbellard case 'P': 6527a5ca864Sbellard partition = strtol(optarg, &end, 0); 653713cc671SPeter Lieven if (*end) { 65485b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 65585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 656713cc671SPeter Lieven } 657713cc671SPeter Lieven if (partition < 1 || partition > 8) { 65885b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 65985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 660713cc671SPeter Lieven } 6617a5ca864Sbellard break; 662cd831bd7Sths case 'k': 663b32f6c28SPaolo Bonzini sockpath = optarg; 664713cc671SPeter Lieven if (sockpath[0] != '/') { 6659af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 66685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 667713cc671SPeter Lieven } 668cd831bd7Sths break; 669cd831bd7Sths case 'd': 670cd831bd7Sths disconnect = true; 671cd831bd7Sths break; 672cd831bd7Sths case 'c': 673cd831bd7Sths device = optarg; 674cd831bd7Sths break; 6753b05a8e9Sths case 'e': 6763b05a8e9Sths shared = strtol(optarg, &end, 0); 6773b05a8e9Sths if (*end) { 67885b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 67985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6803b05a8e9Sths } 6813b05a8e9Sths if (shared < 1) { 6829af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 68385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6843b05a8e9Sths } 6853b05a8e9Sths break; 686e6b63677SDaniel P. Berrange case 'f': 687e6b63677SDaniel P. Berrange fmt = optarg; 688e6b63677SDaniel P. Berrange break; 68975818250Sths case 't': 69075818250Sths persistent = 1; 69175818250Sths break; 6923d4b2f9cSDaniel P. Berrange case 'x': 6933d4b2f9cSDaniel P. Berrange export_name = optarg; 6943d4b2f9cSDaniel P. Berrange break; 695*b1a75b33SEric Blake case 'D': 696*b1a75b33SEric Blake export_description = optarg; 697*b1a75b33SEric Blake break; 6987a5ca864Sbellard case 'v': 6997a5ca864Sbellard verbose = 1; 7007a5ca864Sbellard break; 7017a5ca864Sbellard case 'V': 7027a5ca864Sbellard version(argv[0]); 7037a5ca864Sbellard exit(0); 7047a5ca864Sbellard break; 7057a5ca864Sbellard case 'h': 7067a5ca864Sbellard usage(argv[0]); 7077a5ca864Sbellard exit(0); 7087a5ca864Sbellard break; 7097a5ca864Sbellard case '?': 71085b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 71185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7120ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7130ab3b337SDaniel P. Berrange QemuOpts *opts; 7140ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7150ab3b337SDaniel P. Berrange optarg, true); 7160ab3b337SDaniel P. Berrange if (!opts) { 7170ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7180ab3b337SDaniel P. Berrange } 7190ab3b337SDaniel P. Berrange } break; 720145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 721145614a1SDaniel P. Berrange tlscredsid = optarg; 722145614a1SDaniel P. Berrange break; 72377c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 72477c9aaefSDaniel P. Berrange imageOpts = true; 72577c9aaefSDaniel P. Berrange break; 72639ca463eSDenis V. Lunev case 'T': 72739ca463eSDenis V. Lunev g_free(trace_file); 72839ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 72939ca463eSDenis V. Lunev break; 730ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 731ffb31e1dSMax Reitz fork_process = true; 732ffb31e1dSMax Reitz break; 7337a5ca864Sbellard } 7347a5ca864Sbellard } 7357a5ca864Sbellard 7367a5ca864Sbellard if ((argc - optind) != 1) { 737433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 738433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 73985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7407a5ca864Sbellard } 7417a5ca864Sbellard 7420ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7430ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 74451b9b478SMarkus Armbruster NULL, NULL)) { 7450ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7460ab3b337SDaniel P. Berrange } 7470ab3b337SDaniel P. Berrange 74839ca463eSDenis V. Lunev if (!trace_init_backends()) { 74939ca463eSDenis V. Lunev exit(1); 75039ca463eSDenis V. Lunev } 75139ca463eSDenis V. Lunev trace_init_file(trace_file); 75239ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 75339ca463eSDenis V. Lunev 754145614a1SDaniel P. Berrange if (tlscredsid) { 755145614a1SDaniel P. Berrange if (sockpath) { 756145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 757145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 758145614a1SDaniel P. Berrange } 759145614a1SDaniel P. Berrange if (device) { 760145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 761145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 762145614a1SDaniel P. Berrange } 763145614a1SDaniel P. Berrange if (!export_name) { 764145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 765145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 766145614a1SDaniel P. Berrange export_name = ""; 767145614a1SDaniel P. Berrange } 768145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 769145614a1SDaniel P. Berrange if (local_err) { 770145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 771145614a1SDaniel P. Berrange error_get_pretty(local_err)); 772145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 773145614a1SDaniel P. Berrange } 774145614a1SDaniel P. Berrange } 775145614a1SDaniel P. Berrange 776cd831bd7Sths if (disconnect) { 777d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 778d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 77985b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 78085b01e09SMarkus Armbruster strerror(errno)); 78185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 782fc19f8a0SPaolo Bonzini } 783d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 784cd831bd7Sths 785d0d6ff58SDaniel P. Berrange close(nbdfd); 786cd831bd7Sths 787cd831bd7Sths printf("%s disconnected\n", argv[optind]); 788cd831bd7Sths 789cd831bd7Sths return 0; 790cd831bd7Sths } 791cd831bd7Sths 792ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 793c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 794c1f8fdc3SPaolo Bonzini pid_t pid; 795c1f8fdc3SPaolo Bonzini int ret; 796c1f8fdc3SPaolo Bonzini 797fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 79885b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 79985b01e09SMarkus Armbruster strerror(errno)); 80085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 801c1f8fdc3SPaolo Bonzini } 802c1f8fdc3SPaolo Bonzini 803c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 804c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 805c1f8fdc3SPaolo Bonzini */ 806c1f8fdc3SPaolo Bonzini pid = fork(); 80770d4739eSMax Reitz if (pid < 0) { 80885b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 80985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 81070d4739eSMax Reitz } else if (pid == 0) { 811c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 8129faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 813c1f8fdc3SPaolo Bonzini 814c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 815ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 816c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 817fc19f8a0SPaolo Bonzini if (ret < 0) { 81885b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 81985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 820c1f8fdc3SPaolo Bonzini } 821c1f8fdc3SPaolo Bonzini 822c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 823c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 824c1f8fdc3SPaolo Bonzini } else { 825c1f8fdc3SPaolo Bonzini bool errors = false; 826c1f8fdc3SPaolo Bonzini char *buf; 827c1f8fdc3SPaolo Bonzini 828c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 829c1f8fdc3SPaolo Bonzini * it closes the pipe. 830c1f8fdc3SPaolo Bonzini */ 831c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 832c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 833c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 834c1f8fdc3SPaolo Bonzini errors = true; 835c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 836fc19f8a0SPaolo Bonzini if (ret < 0) { 837c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 838c1f8fdc3SPaolo Bonzini } 839c1f8fdc3SPaolo Bonzini } 840fc19f8a0SPaolo Bonzini if (ret < 0) { 84185b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 84285b01e09SMarkus Armbruster strerror(errno)); 84385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 844c1f8fdc3SPaolo Bonzini } 845c1f8fdc3SPaolo Bonzini 846c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 847c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 848c1f8fdc3SPaolo Bonzini */ 849c1f8fdc3SPaolo Bonzini exit(errors); 850c1f8fdc3SPaolo Bonzini } 851c1f8fdc3SPaolo Bonzini } 852c1f8fdc3SPaolo Bonzini 853a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 854b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 855b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 856cd831bd7Sths } 857cd831bd7Sths 85848bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 85948bec07eSDaniel P. Berrange 8602f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 861565f65d2SMarkus Armbruster error_report_err(local_err); 8622f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 8632f78e491SChrysostomos Nanakos } 864802ddc37SPaolo Bonzini bdrv_init(); 865802ddc37SPaolo Bonzini atexit(bdrv_close_all); 866802ddc37SPaolo Bonzini 86777c9aaefSDaniel P. Berrange srcpath = argv[optind]; 86877c9aaefSDaniel P. Berrange if (imageOpts) { 86977c9aaefSDaniel P. Berrange QemuOpts *opts; 87077c9aaefSDaniel P. Berrange if (fmt) { 87177c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 87277c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 87377c9aaefSDaniel P. Berrange } 87477c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 87577c9aaefSDaniel P. Berrange if (!opts) { 87677c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 87777c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 87877c9aaefSDaniel P. Berrange } 87977c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 88077c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 881efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 88277c9aaefSDaniel P. Berrange } else { 883e6b63677SDaniel P. Berrange if (fmt) { 8844fbec260SMax Reitz options = qdict_new(); 8854fbec260SMax Reitz qdict_put(options, "driver", qstring_from_str(fmt)); 886e6b63677SDaniel P. Berrange } 887efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 88877c9aaefSDaniel P. Berrange } 88977c9aaefSDaniel P. Berrange 8904fbec260SMax Reitz if (!blk) { 891c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 892c29b77f9SMarkus Armbruster argv[optind]); 89385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 894802ddc37SPaolo Bonzini } 8954fbec260SMax Reitz bs = blk_bs(blk); 896802ddc37SPaolo Bonzini 8976effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 8986effd5bfSKevin Wolf 8998c116b0eSWenchao Xia if (sn_opts) { 9008c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 9018c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 9028c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 9038c116b0eSWenchao Xia &local_err); 9048c116b0eSWenchao Xia } else if (sn_id_or_name) { 9058c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 9068c116b0eSWenchao Xia &local_err); 9078c116b0eSWenchao Xia } 9088c116b0eSWenchao Xia if (ret < 0) { 909c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 91085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9118c116b0eSWenchao Xia } 9128c116b0eSWenchao Xia 913b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 9144c58e80aSMax Reitz fd_size = blk_getlength(blk); 91598f44bbeSMax Reitz if (fd_size < 0) { 91685b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 91798f44bbeSMax Reitz strerror(-fd_size)); 91885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 91998f44bbeSMax Reitz } 920802ddc37SPaolo Bonzini 921e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 922e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 923e424b655STomáš Golembiovský "(%lld)", 924e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 925e424b655STomáš Golembiovský exit(EXIT_FAILURE); 926e424b655STomáš Golembiovský } 927e424b655STomáš Golembiovský fd_size -= dev_offset; 928e424b655STomáš Golembiovský 929185b4338SPaolo Bonzini if (partition != -1) { 9304c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 931185b4338SPaolo Bonzini if (ret < 0) { 93285b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 933a4699e55SMarkus Armbruster strerror(-ret)); 93485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 935802ddc37SPaolo Bonzini } 936185b4338SPaolo Bonzini } 937802ddc37SPaolo Bonzini 938cd7fca95SKevin Wolf exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, 939cd7fca95SKevin Wolf writethrough, NULL, &local_err); 94098f44bbeSMax Reitz if (!exp) { 9414fffeb5eSMarkus Armbruster error_report_err(local_err); 94285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 94398f44bbeSMax Reitz } 9443d4b2f9cSDaniel P. Berrange if (export_name) { 9453d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 946*b1a75b33SEric Blake nbd_export_set_description(exp, export_description); 9473d4b2f9cSDaniel P. Berrange newproto = true; 948*b1a75b33SEric Blake } else if (export_description) { 949*b1a75b33SEric Blake error_report("Export description requires an export name"); 950*b1a75b33SEric Blake exit(EXIT_FAILURE); 9513d4b2f9cSDaniel P. Berrange } 9523b05a8e9Sths 953d0d6ff58SDaniel P. Berrange server_ioc = qio_channel_socket_new(); 954d0d6ff58SDaniel P. Berrange if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 955d0d6ff58SDaniel P. Berrange object_unref(OBJECT(server_ioc)); 95648bec07eSDaniel P. Berrange error_report_err(local_err); 9577a5ca864Sbellard return 1; 958a61c6782SPaolo Bonzini } 959f1ef5555SPaolo Bonzini 960f1ef5555SPaolo Bonzini if (device) { 961f1ef5555SPaolo Bonzini int ret; 962f1ef5555SPaolo Bonzini 963a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 964f1ef5555SPaolo Bonzini if (ret != 0) { 96585b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 96685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 967f1ef5555SPaolo Bonzini } 968f1ef5555SPaolo Bonzini } else { 969f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 970f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 971f1ef5555SPaolo Bonzini } 972f1ef5555SPaolo Bonzini 973d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 9747a5ca864Sbellard 9759faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 9769faf31b6SMichael Tokarev * to free any busy filesystems */ 9779faf31b6SMichael Tokarev if (chdir("/") < 0) { 97885b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 97985b01e09SMarkus Armbruster strerror(errno)); 98085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9819faf31b6SMichael Tokarev } 9829faf31b6SMichael Tokarev 983ffb31e1dSMax Reitz if (fork_process) { 984ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 985ffb31e1dSMax Reitz close(old_stderr); 986ffb31e1dSMax Reitz } 987ffb31e1dSMax Reitz 9887860a380SPaolo Bonzini state = RUNNING; 9893b05a8e9Sths do { 990a61c6782SPaolo Bonzini main_loop_wait(false); 9917860a380SPaolo Bonzini if (state == TERMINATE) { 9927860a380SPaolo Bonzini state = TERMINATING; 993af49bbbeSPaolo Bonzini nbd_export_close(exp); 9942c8d9f06SPaolo Bonzini nbd_export_put(exp); 9957860a380SPaolo Bonzini exp = NULL; 9967860a380SPaolo Bonzini } 9977860a380SPaolo Bonzini } while (state != TERMINATED); 9982c8d9f06SPaolo Bonzini 99926f54e9aSMarkus Armbruster blk_unref(blk); 1000b32f6c28SPaolo Bonzini if (sockpath) { 1001b32f6c28SPaolo Bonzini unlink(sockpath); 1002b32f6c28SPaolo Bonzini } 10037a5ca864Sbellard 10048c116b0eSWenchao Xia qemu_opts_del(sn_opts); 10058c116b0eSWenchao Xia 1006a517e88bSPaolo Bonzini if (device) { 1007a517e88bSPaolo Bonzini void *ret; 1008a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1009a517e88bSPaolo Bonzini exit(ret != NULL); 1010a517e88bSPaolo Bonzini } else { 1011a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1012a517e88bSPaolo Bonzini } 10137a5ca864Sbellard } 1014