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" 3153fabd4bSPaolo Bonzini #include "qemu/systemd.h" 328c116b0eSWenchao Xia #include "block/snapshot.h" 33b3838a40SPeter Lieven #include "qapi/util.h" 34d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 350ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 36d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 37c2297088SDaniel P. Berrange #include "crypto/init.h" 3839ca463eSDenis V. Lunev #include "trace/control.h" 397a5ca864Sbellard 407a5ca864Sbellard #include <getopt.h> 412bff4b6fSBlue Swirl #include <libgen.h> 42a517e88bSPaolo Bonzini #include <pthread.h> 43cd831bd7Sths 44cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 45fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 46fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 48fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 49fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 50fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 51fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 52ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 537a5ca864Sbellard 54bd31c214SEric Blake #define MBR_SIZE 512 55bd31c214SEric Blake 56af49bbbeSPaolo Bonzini static NBDExport *exp; 573d4b2f9cSDaniel P. Berrange static bool newproto; 58b1d8e52eSblueswir1 static int verbose; 59a517e88bSPaolo Bonzini static char *srcpath; 60*bd269ebcSMarkus Armbruster static SocketAddress *saddr; 617860a380SPaolo Bonzini static int persistent = 0; 627860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 63a61c6782SPaolo Bonzini static int shared = 1; 64a61c6782SPaolo Bonzini static int nb_fds; 65d0d6ff58SDaniel P. Berrange static QIOChannelSocket *server_ioc; 66d0d6ff58SDaniel P. Berrange static int server_watch = -1; 67145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 687a5ca864Sbellard 697a5ca864Sbellard static void usage(const char *name) 707a5ca864Sbellard { 71b033cd86SPaolo Bonzini (printf) ( 727a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 737a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 747a5ca864Sbellard "\n" 757a5ca864Sbellard " -h, --help display this help and exit\n" 767a5ca864Sbellard " -V, --version output version information and exit\n" 777a5ca864Sbellard "\n" 78b033cd86SPaolo Bonzini "Connection properties:\n" 79b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 80b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 81b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 82b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 83b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 84b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 85b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 86332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 87b1a75b33SEric Blake " -D, --description=TEXT with -x, also export a human-readable description\n" 88b033cd86SPaolo Bonzini "\n" 89b033cd86SPaolo Bonzini "Exposing part of the image:\n" 90b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 91b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 92b033cd86SPaolo Bonzini "\n" 930ab3b337SDaniel P. Berrange "General purpose options:\n" 940ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 950ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 9639ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 9739ca463eSDenis V. Lunev " specify tracing options\n" 98ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 99ffb31e1dSMax Reitz " once the server is running\n" 100b033cd86SPaolo Bonzini #ifdef __linux__ 101b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 102b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 103b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 104b033cd86SPaolo Bonzini "\n" 105b033cd86SPaolo Bonzini #endif 106b033cd86SPaolo Bonzini "\n" 107b033cd86SPaolo Bonzini "Block device options:\n" 1084323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 109b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1108c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1118c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1128c116b0eSWenchao Xia " the temporary one\n" 1138c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1148c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1158c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1168c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1178c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 118b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 11939a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 12039a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 121b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1226883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 12377c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 124b033cd86SPaolo Bonzini "\n" 125b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 126c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1277a5ca864Sbellard } 1287a5ca864Sbellard 1297a5ca864Sbellard static void version(const char *name) 1307a5ca864Sbellard { 1317a5ca864Sbellard printf( 132315bc7aaSths "%s version 0.0.1\n" 1337a5ca864Sbellard "Written by Anthony Liguori.\n" 1347a5ca864Sbellard "\n" 1357a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1367a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1377a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 138315bc7aaSths , name); 1397a5ca864Sbellard } 1407a5ca864Sbellard 1417a5ca864Sbellard struct partition_record 1427a5ca864Sbellard { 1437a5ca864Sbellard uint8_t bootable; 1447a5ca864Sbellard uint8_t start_head; 1457a5ca864Sbellard uint32_t start_cylinder; 1467a5ca864Sbellard uint8_t start_sector; 1477a5ca864Sbellard uint8_t system; 1487a5ca864Sbellard uint8_t end_head; 1497a5ca864Sbellard uint8_t end_cylinder; 1507a5ca864Sbellard uint8_t end_sector; 1517a5ca864Sbellard uint32_t start_sector_abs; 1527a5ca864Sbellard uint32_t nb_sectors_abs; 1537a5ca864Sbellard }; 1547a5ca864Sbellard 1557a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1567a5ca864Sbellard { 1577a5ca864Sbellard r->bootable = p[0]; 1587a5ca864Sbellard r->start_head = p[1]; 1597a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1607a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1617a5ca864Sbellard r->system = p[4]; 1627a5ca864Sbellard r->end_head = p[5]; 1637a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1647a5ca864Sbellard r->end_sector = p[6] & 0x3f; 165ac97393dSMax Reitz 166773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 167773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1687a5ca864Sbellard } 1697a5ca864Sbellard 1704c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1717a5ca864Sbellard off_t *offset, off_t *size) 1727a5ca864Sbellard { 1737a5ca864Sbellard struct partition_record mbr[4]; 174bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1757a5ca864Sbellard int i; 1767a5ca864Sbellard int ext_partnum = 4; 177cb7cf0e3SRyota Ozaki int ret; 1787a5ca864Sbellard 179bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 180bd31c214SEric Blake if (ret < 0) { 181a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 183cb7cf0e3SRyota Ozaki } 1847a5ca864Sbellard 1857a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 186185b4338SPaolo Bonzini return -EINVAL; 1877a5ca864Sbellard } 1887a5ca864Sbellard 1897a5ca864Sbellard for (i = 0; i < 4; i++) { 1907a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1917a5ca864Sbellard 192453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1937a5ca864Sbellard continue; 194453b07b1SMax Reitz } 1957a5ca864Sbellard 1967a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1977a5ca864Sbellard struct partition_record ext[4]; 198bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 1997a5ca864Sbellard int j; 2007a5ca864Sbellard 201bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 202bd31c214SEric Blake data1, sizeof(data1)); 203bd31c214SEric Blake if (ret < 0) { 204a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 206cb7cf0e3SRyota Ozaki } 2077a5ca864Sbellard 2087a5ca864Sbellard for (j = 0; j < 4; j++) { 2097a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 210453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2117a5ca864Sbellard continue; 212453b07b1SMax Reitz } 2137a5ca864Sbellard 2147a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2157a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2167a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2177a5ca864Sbellard return 0; 2187a5ca864Sbellard } 2197a5ca864Sbellard } 2207a5ca864Sbellard ext_partnum += 4; 2217a5ca864Sbellard } else if ((i + 1) == partition) { 2227a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2237a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2247a5ca864Sbellard return 0; 2257a5ca864Sbellard } 2267a5ca864Sbellard } 2277a5ca864Sbellard 228185b4338SPaolo Bonzini return -ENOENT; 2297a5ca864Sbellard } 2307a5ca864Sbellard 231bb345110SPaolo Bonzini static void termsig_handler(int signum) 232bb345110SPaolo Bonzini { 23323994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 234a61c6782SPaolo Bonzini qemu_notify_event(); 235bb345110SPaolo Bonzini } 236bb345110SPaolo Bonzini 237537b41f5SPaolo Bonzini 238a517e88bSPaolo Bonzini static void *show_parts(void *arg) 239cd831bd7Sths { 240a6ac2313SPaolo Bonzini char *device = arg; 241cd831bd7Sths int nbd; 242cd831bd7Sths 243cd831bd7Sths /* linux just needs an open() to trigger 244cd831bd7Sths * the partition table update 245cd831bd7Sths * but remember to load the module with max_part != 0 : 246cd831bd7Sths * modprobe nbd max_part=63 247cd831bd7Sths */ 248cd831bd7Sths nbd = open(device, O_RDWR); 249fc19f8a0SPaolo Bonzini if (nbd >= 0) { 250cd831bd7Sths close(nbd); 251cd831bd7Sths } 252a517e88bSPaolo Bonzini return NULL; 253a517e88bSPaolo Bonzini } 254a517e88bSPaolo Bonzini 255a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 256a517e88bSPaolo Bonzini { 257a6ac2313SPaolo Bonzini char *device = arg; 258a517e88bSPaolo Bonzini off_t size; 2597423f417SEric Blake uint16_t nbdflags; 260d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 261d0d6ff58SDaniel P. Berrange int fd; 262a517e88bSPaolo Bonzini int ret; 263a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2641ce52846SMax Reitz Error *local_error = NULL; 265a517e88bSPaolo Bonzini 266d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 267d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 268d0d6ff58SDaniel P. Berrange saddr, 269d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27048bec07eSDaniel P. Berrange error_report_err(local_error); 271a517e88bSPaolo Bonzini goto out; 272a517e88bSPaolo Bonzini } 273a517e88bSPaolo Bonzini 2741c778ef7SDaniel P. Berrange ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, 275f95910feSDaniel P. Berrange NULL, NULL, NULL, 2763f472659SMax Reitz &size, &local_error); 277fc19f8a0SPaolo Bonzini if (ret < 0) { 2781ce52846SMax Reitz if (local_error) { 27978288671SMarkus Armbruster error_report_err(local_error); 2801ce52846SMax Reitz } 2810c544d73SPaolo Bonzini goto out_socket; 282a517e88bSPaolo Bonzini } 283a517e88bSPaolo Bonzini 284a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 285fc19f8a0SPaolo Bonzini if (fd < 0) { 286a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 287b9884681SMarkus Armbruster error_report("Failed to open %s: %m", device); 2880c544d73SPaolo Bonzini goto out_socket; 289a6ac2313SPaolo Bonzini } 290a6ac2313SPaolo Bonzini 2911c778ef7SDaniel P. Berrange ret = nbd_init(fd, sioc, nbdflags, size); 292fc19f8a0SPaolo Bonzini if (ret < 0) { 2930c544d73SPaolo Bonzini goto out_fd; 294a517e88bSPaolo Bonzini } 295a517e88bSPaolo Bonzini 296a517e88bSPaolo Bonzini /* update partition table */ 297a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 298a517e88bSPaolo Bonzini 299c1f8fdc3SPaolo Bonzini if (verbose) { 300a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 301a517e88bSPaolo Bonzini device, srcpath); 302c1f8fdc3SPaolo Bonzini } else { 303c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 304c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 305c1f8fdc3SPaolo Bonzini } 306a517e88bSPaolo Bonzini 307a517e88bSPaolo Bonzini ret = nbd_client(fd); 308a517e88bSPaolo Bonzini if (ret) { 3090c544d73SPaolo Bonzini goto out_fd; 310a517e88bSPaolo Bonzini } 311a517e88bSPaolo Bonzini close(fd); 312d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 313a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 314a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 315a517e88bSPaolo Bonzini 3160c544d73SPaolo Bonzini out_fd: 3170c544d73SPaolo Bonzini close(fd); 3180c544d73SPaolo Bonzini out_socket: 319d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 320a517e88bSPaolo Bonzini out: 321a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 322a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 323cd831bd7Sths } 324cd831bd7Sths 325e4afbf4fSFam Zheng static int nbd_can_accept(void) 326a61c6782SPaolo Bonzini { 327a61c6782SPaolo Bonzini return nb_fds < shared; 328a61c6782SPaolo Bonzini } 329a61c6782SPaolo Bonzini 3307860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3317860a380SPaolo Bonzini { 3327860a380SPaolo Bonzini assert(state == TERMINATING); 3337860a380SPaolo Bonzini state = TERMINATED; 3347860a380SPaolo Bonzini } 3357860a380SPaolo Bonzini 336d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 337e4afbf4fSFam Zheng 3381743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 339a61c6782SPaolo Bonzini { 340a61c6782SPaolo Bonzini nb_fds--; 3417860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3427860a380SPaolo Bonzini state = TERMINATE; 3437860a380SPaolo Bonzini } 344d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3457860a380SPaolo Bonzini nbd_client_put(client); 346a61c6782SPaolo Bonzini } 347a61c6782SPaolo Bonzini 348d0d6ff58SDaniel P. Berrange static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) 349a61c6782SPaolo Bonzini { 350d0d6ff58SDaniel P. Berrange QIOChannelSocket *cioc; 351a61c6782SPaolo Bonzini 352d0d6ff58SDaniel P. Berrange cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), 353d0d6ff58SDaniel P. Berrange NULL); 354d0d6ff58SDaniel P. Berrange if (!cioc) { 355d0d6ff58SDaniel P. Berrange return TRUE; 3560c544d73SPaolo Bonzini } 3570c544d73SPaolo Bonzini 3587860a380SPaolo Bonzini if (state >= TERMINATE) { 359d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 360d0d6ff58SDaniel P. Berrange return TRUE; 3617860a380SPaolo Bonzini } 3627860a380SPaolo Bonzini 363a61c6782SPaolo Bonzini nb_fds++; 364d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 365f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 366145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 367d0d6ff58SDaniel P. Berrange object_unref(OBJECT(cioc)); 368a61c6782SPaolo Bonzini 369d0d6ff58SDaniel P. Berrange return TRUE; 370d0d6ff58SDaniel P. Berrange } 371d0d6ff58SDaniel P. Berrange 372d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 373e4afbf4fSFam Zheng { 374e4afbf4fSFam Zheng if (nbd_can_accept()) { 375d0d6ff58SDaniel P. Berrange if (server_watch == -1) { 376d0d6ff58SDaniel P. Berrange server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), 377d0d6ff58SDaniel P. Berrange G_IO_IN, 378d0d6ff58SDaniel P. Berrange nbd_accept, 379d0d6ff58SDaniel P. Berrange NULL, NULL); 380d0d6ff58SDaniel P. Berrange } 381e4afbf4fSFam Zheng } else { 382d0d6ff58SDaniel P. Berrange if (server_watch != -1) { 383d0d6ff58SDaniel P. Berrange g_source_remove(server_watch); 384d0d6ff58SDaniel P. Berrange server_watch = -1; 385d0d6ff58SDaniel P. Berrange } 386e4afbf4fSFam Zheng } 387e4afbf4fSFam Zheng } 388e4afbf4fSFam Zheng 38948bec07eSDaniel P. Berrange 390*bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 39148bec07eSDaniel P. Berrange const char *bindto, 39248bec07eSDaniel P. Berrange const char *port) 39348bec07eSDaniel P. Berrange { 394*bd269ebcSMarkus Armbruster SocketAddress *saddr; 39548bec07eSDaniel P. Berrange 396*bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 39748bec07eSDaniel P. Berrange if (sockpath) { 398*bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 399*bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 40048bec07eSDaniel P. Berrange } else { 4010399293eSEric Blake InetSocketAddress *inet; 402*bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 403*bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 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 466a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 467a721f53bSRichard W.M. Jones { 468a721f53bSRichard W.M. Jones if (*address == NULL) { 469a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 470a721f53bSRichard W.M. Jones } 471a721f53bSRichard W.M. Jones 472a721f53bSRichard W.M. Jones if (*port == NULL) { 473a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 474a721f53bSRichard W.M. Jones } 475a721f53bSRichard W.M. Jones } 476a721f53bSRichard W.M. Jones 477a721f53bSRichard W.M. Jones /* 478a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 479a721f53bSRichard W.M. Jones */ 480a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 481a721f53bSRichard W.M. Jones const char *sockpath, 482a721f53bSRichard W.M. Jones const char *address, 483a721f53bSRichard W.M. Jones const char *port) 484a721f53bSRichard W.M. Jones { 485a721f53bSRichard W.M. Jones if (device != NULL) { 486a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 487a721f53bSRichard W.M. Jones } 488a721f53bSRichard W.M. Jones 489a721f53bSRichard W.M. Jones if (sockpath != NULL) { 490a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 491a721f53bSRichard W.M. Jones } 492a721f53bSRichard W.M. Jones 493a721f53bSRichard W.M. Jones if (address != NULL) { 494a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 495a721f53bSRichard W.M. Jones } 496a721f53bSRichard W.M. Jones 497a721f53bSRichard W.M. Jones if (port != NULL) { 498a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 499a721f53bSRichard W.M. Jones } 500a721f53bSRichard W.M. Jones 501a721f53bSRichard W.M. Jones return NULL; 502a721f53bSRichard W.M. Jones } 503145614a1SDaniel P. Berrange 5047a5ca864Sbellard int main(int argc, char **argv) 5057a5ca864Sbellard { 50626f54e9aSMarkus Armbruster BlockBackend *blk; 5077a5ca864Sbellard BlockDriverState *bs; 5087a5ca864Sbellard off_t dev_offset = 0; 5097423f417SEric Blake uint16_t nbdflags = 0; 510cd831bd7Sths bool disconnect = false; 511a721f53bSRichard W.M. Jones const char *bindto = NULL; 51248bec07eSDaniel P. Berrange const char *port = NULL; 51348bec07eSDaniel P. Berrange char *sockpath = NULL; 514a6ac2313SPaolo Bonzini char *device = NULL; 5157a5ca864Sbellard off_t fd_size; 5168c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5178c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 518b1a75b33SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:"; 5197a5ca864Sbellard struct option lopt[] = { 520aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 521aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 522aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 523aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 524aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 525aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 526aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 527aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 528aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 529aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 530aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 531aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 532aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 533aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 534aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 535aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 536aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 537aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 538aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 539aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 540aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 541aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 542aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 543aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 544b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 545aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 546aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 54739ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 548ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 549660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5507a5ca864Sbellard }; 5517a5ca864Sbellard int ch; 5527a5ca864Sbellard int opt_ind = 0; 5537a5ca864Sbellard char *end; 554f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5557a5ca864Sbellard int partition = -1; 5564fbec260SMax Reitz int ret = 0; 55739a5235cSPaolo Bonzini bool seen_cache = false; 558ded9d2d5SPaolo Bonzini bool seen_discard = false; 55939a5235cSPaolo Bonzini bool seen_aio = false; 560a517e88bSPaolo Bonzini pthread_t client_thread; 561e6b63677SDaniel P. Berrange const char *fmt = NULL; 56234b5d2c6SMax Reitz Error *local_err = NULL; 563b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5644fbec260SMax Reitz QDict *options = NULL; 5653d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 566b1a75b33SEric Blake const char *export_description = NULL; 567145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 56877c9aaefSDaniel P. Berrange bool imageOpts = false; 5696effd5bfSKevin Wolf bool writethrough = true; 57039ca463eSDenis V. Lunev char *trace_file = NULL; 571ffb31e1dSMax Reitz bool fork_process = false; 572ffb31e1dSMax Reitz int old_stderr = -1; 573a721f53bSRichard W.M. Jones unsigned socket_activation; 5747a5ca864Sbellard 575a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 576a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 577a517e88bSPaolo Bonzini */ 578bb345110SPaolo Bonzini struct sigaction sa_sigterm; 579bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 580bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 581bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 582c2297088SDaniel P. Berrange 583fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 584e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 585c2297088SDaniel P. Berrange 5860ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5870ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 58839ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 58910f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 590bb345110SPaolo Bonzini 5917a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5927a5ca864Sbellard switch (ch) { 5937a5ca864Sbellard case 's': 5942f726488Sths flags |= BDRV_O_SNAPSHOT; 5952f726488Sths break; 5962f726488Sths case 'n': 59739a5235cSPaolo Bonzini optarg = (char *) "none"; 59839a5235cSPaolo Bonzini /* fallthrough */ 59939a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 60039a5235cSPaolo Bonzini if (seen_cache) { 60185b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 60285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60339a5235cSPaolo Bonzini } 60439a5235cSPaolo Bonzini seen_cache = true; 6056effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 60685b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 60785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60839a5235cSPaolo Bonzini } 6097a5ca864Sbellard break; 61039a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 61139a5235cSPaolo Bonzini if (seen_aio) { 61285b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 61385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61439a5235cSPaolo Bonzini } 61539a5235cSPaolo Bonzini seen_aio = true; 61639a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 61739a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 61839a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 61939a5235cSPaolo Bonzini /* this is the default */ 62039a5235cSPaolo Bonzini } else { 62185b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 62285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 62339a5235cSPaolo Bonzini } 62439a5235cSPaolo Bonzini break; 625ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 626ded9d2d5SPaolo Bonzini if (seen_discard) { 62785b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 62885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 629ded9d2d5SPaolo Bonzini } 630ded9d2d5SPaolo Bonzini seen_discard = true; 631ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 63285b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 63385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 634ded9d2d5SPaolo Bonzini } 635ded9d2d5SPaolo Bonzini break; 636b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 637b3838a40SPeter Lieven detect_zeroes = 638b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 639b3838a40SPeter Lieven optarg, 6407fb1cf16SEric Blake BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, 641b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 642b3838a40SPeter Lieven &local_err); 643b3838a40SPeter Lieven if (local_err) { 644c29b77f9SMarkus Armbruster error_reportf_err(local_err, 645c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 64685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 647b3838a40SPeter Lieven } 648b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 649b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 65085b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 651b3838a40SPeter Lieven "without setting discard operation to unmap"); 65285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 653b3838a40SPeter Lieven } 654b3838a40SPeter Lieven break; 6557a5ca864Sbellard case 'b': 6567a5ca864Sbellard bindto = optarg; 6577a5ca864Sbellard break; 6587a5ca864Sbellard case 'p': 65948bec07eSDaniel P. Berrange port = optarg; 6607a5ca864Sbellard break; 6617a5ca864Sbellard case 'o': 6627a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6637a5ca864Sbellard if (*end) { 66485b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 66585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6667a5ca864Sbellard } 6677a5ca864Sbellard if (dev_offset < 0) { 66885b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 66985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6707a5ca864Sbellard } 6717a5ca864Sbellard break; 6728c116b0eSWenchao Xia case 'l': 6738c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 67470b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 67570b94331SMarkus Armbruster optarg, false); 6768c116b0eSWenchao Xia if (!sn_opts) { 67785b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6788c116b0eSWenchao Xia optarg); 67985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6808c116b0eSWenchao Xia } 6818c116b0eSWenchao Xia } else { 6828c116b0eSWenchao Xia sn_id_or_name = optarg; 6838c116b0eSWenchao Xia } 6848c116b0eSWenchao Xia /* fall through */ 6857a5ca864Sbellard case 'r': 686b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 68707108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6887a5ca864Sbellard break; 6897a5ca864Sbellard case 'P': 6907a5ca864Sbellard partition = strtol(optarg, &end, 0); 691713cc671SPeter Lieven if (*end) { 69285b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 69385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 694713cc671SPeter Lieven } 695713cc671SPeter Lieven if (partition < 1 || partition > 8) { 69685b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 69785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 698713cc671SPeter Lieven } 6997a5ca864Sbellard break; 700cd831bd7Sths case 'k': 701b32f6c28SPaolo Bonzini sockpath = optarg; 702713cc671SPeter Lieven if (sockpath[0] != '/') { 7039af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 70485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 705713cc671SPeter Lieven } 706cd831bd7Sths break; 707cd831bd7Sths case 'd': 708cd831bd7Sths disconnect = true; 709cd831bd7Sths break; 710cd831bd7Sths case 'c': 711cd831bd7Sths device = optarg; 712cd831bd7Sths break; 7133b05a8e9Sths case 'e': 7143b05a8e9Sths shared = strtol(optarg, &end, 0); 7153b05a8e9Sths if (*end) { 71685b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 71785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7183b05a8e9Sths } 7193b05a8e9Sths if (shared < 1) { 7209af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 72185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7223b05a8e9Sths } 7233b05a8e9Sths break; 724e6b63677SDaniel P. Berrange case 'f': 725e6b63677SDaniel P. Berrange fmt = optarg; 726e6b63677SDaniel P. Berrange break; 72775818250Sths case 't': 72875818250Sths persistent = 1; 72975818250Sths break; 7303d4b2f9cSDaniel P. Berrange case 'x': 7313d4b2f9cSDaniel P. Berrange export_name = optarg; 7323d4b2f9cSDaniel P. Berrange break; 733b1a75b33SEric Blake case 'D': 734b1a75b33SEric Blake export_description = optarg; 735b1a75b33SEric Blake break; 7367a5ca864Sbellard case 'v': 7377a5ca864Sbellard verbose = 1; 7387a5ca864Sbellard break; 7397a5ca864Sbellard case 'V': 7407a5ca864Sbellard version(argv[0]); 7417a5ca864Sbellard exit(0); 7427a5ca864Sbellard break; 7437a5ca864Sbellard case 'h': 7447a5ca864Sbellard usage(argv[0]); 7457a5ca864Sbellard exit(0); 7467a5ca864Sbellard break; 7477a5ca864Sbellard case '?': 74885b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 74985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7500ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7510ab3b337SDaniel P. Berrange QemuOpts *opts; 7520ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7530ab3b337SDaniel P. Berrange optarg, true); 7540ab3b337SDaniel P. Berrange if (!opts) { 7550ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7560ab3b337SDaniel P. Berrange } 7570ab3b337SDaniel P. Berrange } break; 758145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 759145614a1SDaniel P. Berrange tlscredsid = optarg; 760145614a1SDaniel P. Berrange break; 76177c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 76277c9aaefSDaniel P. Berrange imageOpts = true; 76377c9aaefSDaniel P. Berrange break; 76439ca463eSDenis V. Lunev case 'T': 76539ca463eSDenis V. Lunev g_free(trace_file); 76639ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 76739ca463eSDenis V. Lunev break; 768ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 769ffb31e1dSMax Reitz fork_process = true; 770ffb31e1dSMax Reitz break; 7717a5ca864Sbellard } 7727a5ca864Sbellard } 7737a5ca864Sbellard 7747a5ca864Sbellard if ((argc - optind) != 1) { 775433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 776433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 77785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7787a5ca864Sbellard } 7797a5ca864Sbellard 7800ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7810ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 78251b9b478SMarkus Armbruster NULL, NULL)) { 7830ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7840ab3b337SDaniel P. Berrange } 7850ab3b337SDaniel P. Berrange 78639ca463eSDenis V. Lunev if (!trace_init_backends()) { 78739ca463eSDenis V. Lunev exit(1); 78839ca463eSDenis V. Lunev } 78939ca463eSDenis V. Lunev trace_init_file(trace_file); 79039ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 79139ca463eSDenis V. Lunev 792a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 793a721f53bSRichard W.M. Jones if (socket_activation == 0) { 794a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 795a721f53bSRichard W.M. Jones } else { 796a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 797a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 798a721f53bSRichard W.M. Jones bindto, port); 799a721f53bSRichard W.M. Jones if (err_msg != NULL) { 800a721f53bSRichard W.M. Jones error_report("%s", err_msg); 801a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 802a721f53bSRichard W.M. Jones } 80353fabd4bSPaolo Bonzini 80453fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 80553fabd4bSPaolo Bonzini if (socket_activation > 1) { 80653fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 80753fabd4bSPaolo Bonzini "LISTEN_FDS"); 80853fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 80953fabd4bSPaolo Bonzini } 810a721f53bSRichard W.M. Jones } 811a721f53bSRichard W.M. Jones 812145614a1SDaniel P. Berrange if (tlscredsid) { 813145614a1SDaniel P. Berrange if (sockpath) { 814145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 815145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 816145614a1SDaniel P. Berrange } 817145614a1SDaniel P. Berrange if (device) { 818145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 819145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 820145614a1SDaniel P. Berrange } 821145614a1SDaniel P. Berrange if (!export_name) { 822145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 823145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 824145614a1SDaniel P. Berrange export_name = ""; 825145614a1SDaniel P. Berrange } 826145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 827145614a1SDaniel P. Berrange if (local_err) { 828145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 829145614a1SDaniel P. Berrange error_get_pretty(local_err)); 830145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 831145614a1SDaniel P. Berrange } 832145614a1SDaniel P. Berrange } 833145614a1SDaniel P. Berrange 834cd831bd7Sths if (disconnect) { 835d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 836d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 83785b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 83885b01e09SMarkus Armbruster strerror(errno)); 83985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 840fc19f8a0SPaolo Bonzini } 841d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 842cd831bd7Sths 843d0d6ff58SDaniel P. Berrange close(nbdfd); 844cd831bd7Sths 845cd831bd7Sths printf("%s disconnected\n", argv[optind]); 846cd831bd7Sths 847cd831bd7Sths return 0; 848cd831bd7Sths } 849cd831bd7Sths 850ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 851c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 852c1f8fdc3SPaolo Bonzini pid_t pid; 853c1f8fdc3SPaolo Bonzini int ret; 854c1f8fdc3SPaolo Bonzini 855fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 85685b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 85785b01e09SMarkus Armbruster strerror(errno)); 85885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 859c1f8fdc3SPaolo Bonzini } 860c1f8fdc3SPaolo Bonzini 861c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 862c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 863c1f8fdc3SPaolo Bonzini */ 864c1f8fdc3SPaolo Bonzini pid = fork(); 86570d4739eSMax Reitz if (pid < 0) { 86685b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 86785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 86870d4739eSMax Reitz } else if (pid == 0) { 869c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 8709faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 871c1f8fdc3SPaolo Bonzini 872c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 873ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 874c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 875fc19f8a0SPaolo Bonzini if (ret < 0) { 87685b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 87785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 878c1f8fdc3SPaolo Bonzini } 879c1f8fdc3SPaolo Bonzini 880c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 881c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 882c1f8fdc3SPaolo Bonzini } else { 883c1f8fdc3SPaolo Bonzini bool errors = false; 884c1f8fdc3SPaolo Bonzini char *buf; 885c1f8fdc3SPaolo Bonzini 886c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 887c1f8fdc3SPaolo Bonzini * it closes the pipe. 888c1f8fdc3SPaolo Bonzini */ 889c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 890c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 891c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 892c1f8fdc3SPaolo Bonzini errors = true; 893c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 894fc19f8a0SPaolo Bonzini if (ret < 0) { 895c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 896c1f8fdc3SPaolo Bonzini } 897c1f8fdc3SPaolo Bonzini } 898fc19f8a0SPaolo Bonzini if (ret < 0) { 89985b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 90085b01e09SMarkus Armbruster strerror(errno)); 90185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 902c1f8fdc3SPaolo Bonzini } 903c1f8fdc3SPaolo Bonzini 904c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 905c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 906c1f8fdc3SPaolo Bonzini */ 907c1f8fdc3SPaolo Bonzini exit(errors); 908c1f8fdc3SPaolo Bonzini } 909c1f8fdc3SPaolo Bonzini } 910c1f8fdc3SPaolo Bonzini 911a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 912b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 913b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 914cd831bd7Sths } 915cd831bd7Sths 916a721f53bSRichard W.M. Jones if (socket_activation == 0) { 917a721f53bSRichard W.M. Jones server_ioc = qio_channel_socket_new(); 91848bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 919a721f53bSRichard W.M. Jones if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { 920a721f53bSRichard W.M. Jones object_unref(OBJECT(server_ioc)); 921a721f53bSRichard W.M. Jones error_report_err(local_err); 922a721f53bSRichard W.M. Jones return 1; 923a721f53bSRichard W.M. Jones } 924a721f53bSRichard W.M. Jones } else { 925a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 926a721f53bSRichard W.M. Jones assert(socket_activation == 1); 927a721f53bSRichard W.M. Jones server_ioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD, 928a721f53bSRichard W.M. Jones &local_err); 929a721f53bSRichard W.M. Jones if (server_ioc == NULL) { 930a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 931a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 932a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 933a721f53bSRichard W.M. Jones } 934a721f53bSRichard W.M. Jones } 93548bec07eSDaniel P. Berrange 9362f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 937565f65d2SMarkus Armbruster error_report_err(local_err); 9382f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9392f78e491SChrysostomos Nanakos } 940802ddc37SPaolo Bonzini bdrv_init(); 941802ddc37SPaolo Bonzini atexit(bdrv_close_all); 942802ddc37SPaolo Bonzini 94377c9aaefSDaniel P. Berrange srcpath = argv[optind]; 94477c9aaefSDaniel P. Berrange if (imageOpts) { 94577c9aaefSDaniel P. Berrange QemuOpts *opts; 94677c9aaefSDaniel P. Berrange if (fmt) { 94777c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 94877c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 94977c9aaefSDaniel P. Berrange } 95077c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 95177c9aaefSDaniel P. Berrange if (!opts) { 95277c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 95377c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 95477c9aaefSDaniel P. Berrange } 95577c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 95677c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 957efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 95877c9aaefSDaniel P. Berrange } else { 959e6b63677SDaniel P. Berrange if (fmt) { 9604fbec260SMax Reitz options = qdict_new(); 96146f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 962e6b63677SDaniel P. Berrange } 963efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 96477c9aaefSDaniel P. Berrange } 96577c9aaefSDaniel P. Berrange 9664fbec260SMax Reitz if (!blk) { 967c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 968c29b77f9SMarkus Armbruster argv[optind]); 96985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 970802ddc37SPaolo Bonzini } 9714fbec260SMax Reitz bs = blk_bs(blk); 972802ddc37SPaolo Bonzini 9736effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 9746effd5bfSKevin Wolf 9758c116b0eSWenchao Xia if (sn_opts) { 9768c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 9778c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 9788c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 9798c116b0eSWenchao Xia &local_err); 9808c116b0eSWenchao Xia } else if (sn_id_or_name) { 9818c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 9828c116b0eSWenchao Xia &local_err); 9838c116b0eSWenchao Xia } 9848c116b0eSWenchao Xia if (ret < 0) { 985c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 98685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9878c116b0eSWenchao Xia } 9888c116b0eSWenchao Xia 989b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 9904c58e80aSMax Reitz fd_size = blk_getlength(blk); 99198f44bbeSMax Reitz if (fd_size < 0) { 99285b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 99398f44bbeSMax Reitz strerror(-fd_size)); 99485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 99598f44bbeSMax Reitz } 996802ddc37SPaolo Bonzini 997e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 998e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 999e424b655STomáš Golembiovský "(%lld)", 1000e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 1001e424b655STomáš Golembiovský exit(EXIT_FAILURE); 1002e424b655STomáš Golembiovský } 1003e424b655STomáš Golembiovský fd_size -= dev_offset; 1004e424b655STomáš Golembiovský 1005185b4338SPaolo Bonzini if (partition != -1) { 10064c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 1007185b4338SPaolo Bonzini if (ret < 0) { 100885b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1009a4699e55SMarkus Armbruster strerror(-ret)); 101085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1011802ddc37SPaolo Bonzini } 1012185b4338SPaolo Bonzini } 1013802ddc37SPaolo Bonzini 1014cd7fca95SKevin Wolf exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, 1015cd7fca95SKevin Wolf writethrough, NULL, &local_err); 101698f44bbeSMax Reitz if (!exp) { 10174fffeb5eSMarkus Armbruster error_report_err(local_err); 101885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 101998f44bbeSMax Reitz } 10203d4b2f9cSDaniel P. Berrange if (export_name) { 10213d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 1022b1a75b33SEric Blake nbd_export_set_description(exp, export_description); 10233d4b2f9cSDaniel P. Berrange newproto = true; 1024b1a75b33SEric Blake } else if (export_description) { 1025b1a75b33SEric Blake error_report("Export description requires an export name"); 1026b1a75b33SEric Blake exit(EXIT_FAILURE); 10273d4b2f9cSDaniel P. Berrange } 10283b05a8e9Sths 1029f1ef5555SPaolo Bonzini if (device) { 1030f1ef5555SPaolo Bonzini int ret; 1031f1ef5555SPaolo Bonzini 1032a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1033f1ef5555SPaolo Bonzini if (ret != 0) { 103485b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 103585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1036f1ef5555SPaolo Bonzini } 1037f1ef5555SPaolo Bonzini } else { 1038f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1039f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1040f1ef5555SPaolo Bonzini } 1041f1ef5555SPaolo Bonzini 1042d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10437a5ca864Sbellard 10449faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 10459faf31b6SMichael Tokarev * to free any busy filesystems */ 10469faf31b6SMichael Tokarev if (chdir("/") < 0) { 104785b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 104885b01e09SMarkus Armbruster strerror(errno)); 104985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10509faf31b6SMichael Tokarev } 10519faf31b6SMichael Tokarev 1052ffb31e1dSMax Reitz if (fork_process) { 1053ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1054ffb31e1dSMax Reitz close(old_stderr); 1055ffb31e1dSMax Reitz } 1056ffb31e1dSMax Reitz 10577860a380SPaolo Bonzini state = RUNNING; 10583b05a8e9Sths do { 1059a61c6782SPaolo Bonzini main_loop_wait(false); 10607860a380SPaolo Bonzini if (state == TERMINATE) { 10617860a380SPaolo Bonzini state = TERMINATING; 1062af49bbbeSPaolo Bonzini nbd_export_close(exp); 10632c8d9f06SPaolo Bonzini nbd_export_put(exp); 10647860a380SPaolo Bonzini exp = NULL; 10657860a380SPaolo Bonzini } 10667860a380SPaolo Bonzini } while (state != TERMINATED); 10672c8d9f06SPaolo Bonzini 106826f54e9aSMarkus Armbruster blk_unref(blk); 1069b32f6c28SPaolo Bonzini if (sockpath) { 1070b32f6c28SPaolo Bonzini unlink(sockpath); 1071b32f6c28SPaolo Bonzini } 10727a5ca864Sbellard 10738c116b0eSWenchao Xia qemu_opts_del(sn_opts); 10748c116b0eSWenchao Xia 1075a517e88bSPaolo Bonzini if (device) { 1076a517e88bSPaolo Bonzini void *ret; 1077a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1078a517e88bSPaolo Bonzini exit(ret != NULL); 1079a517e88bSPaolo Bonzini } else { 1080a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1081a517e88bSPaolo Bonzini } 10827a5ca864Sbellard } 1083