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" 20c2a3d7daSEric Blake #include <getopt.h> 21c2a3d7daSEric Blake #include <libgen.h> 22c2a3d7daSEric Blake #include <pthread.h> 23c2a3d7daSEric Blake 24da34e65cSMarkus Armbruster #include "qapi/error.h" 25f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 2626f54e9aSMarkus Armbruster #include "sysemu/block-backend.h" 27b3838a40SPeter Lieven #include "block/block_int.h" 28737e150eSPaolo Bonzini #include "block/nbd.h" 296a1751b7SAlex Bligh #include "qemu/main-loop.h" 30922a01a0SMarkus Armbruster #include "qemu/option.h" 31537b41f5SPaolo Bonzini #include "qemu/error-report.h" 320ab3b337SDaniel P. Berrange #include "qemu/config-file.h" 3358369e22SPaolo Bonzini #include "qemu/bswap.h" 3439ca463eSDenis V. Lunev #include "qemu/log.h" 3553fabd4bSPaolo Bonzini #include "qemu/systemd.h" 368c116b0eSWenchao Xia #include "block/snapshot.h" 37452fcdbcSMarkus Armbruster #include "qapi/qmp/qdict.h" 38d49b6836SMarkus Armbruster #include "qapi/qmp/qstring.h" 390ab3b337SDaniel P. Berrange #include "qom/object_interfaces.h" 40d0d6ff58SDaniel P. Berrange #include "io/channel-socket.h" 41e4849c1dSDaniel P. Berrange #include "io/net-listener.h" 42c2297088SDaniel P. Berrange #include "crypto/init.h" 4339ca463eSDenis V. Lunev #include "trace/control.h" 44be377133SEric Blake #include "qemu-version.h" 457a5ca864Sbellard 46cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 47fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_CACHE 256 48fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_AIO 257 49fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DISCARD 258 50fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_DETECT_ZEROES 259 51fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_OBJECT 260 52fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_TLSCREDS 261 53fa8b7ce2SDaniel P. Berrange #define QEMU_NBD_OPT_IMAGE_OPTS 262 54ffb31e1dSMax Reitz #define QEMU_NBD_OPT_FORK 263 557a5ca864Sbellard 56bd31c214SEric Blake #define MBR_SIZE 512 57bd31c214SEric Blake 58af49bbbeSPaolo Bonzini static NBDExport *exp; 593d4b2f9cSDaniel P. Berrange static bool newproto; 60b1d8e52eSblueswir1 static int verbose; 61a517e88bSPaolo Bonzini static char *srcpath; 62bd269ebcSMarkus Armbruster static SocketAddress *saddr; 637860a380SPaolo Bonzini static int persistent = 0; 647860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 65a61c6782SPaolo Bonzini static int shared = 1; 66a61c6782SPaolo Bonzini static int nb_fds; 67e4849c1dSDaniel P. Berrange static QIONetListener *server; 68145614a1SDaniel P. Berrange static QCryptoTLSCreds *tlscreds; 697a5ca864Sbellard 707a5ca864Sbellard static void usage(const char *name) 717a5ca864Sbellard { 72b033cd86SPaolo Bonzini (printf) ( 737a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 747a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 757a5ca864Sbellard "\n" 767a5ca864Sbellard " -h, --help display this help and exit\n" 777a5ca864Sbellard " -V, --version output version information and exit\n" 787a5ca864Sbellard "\n" 79b033cd86SPaolo Bonzini "Connection properties:\n" 80b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 81b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 82b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 83b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 84b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 85b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 86b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 87332a254bSEric Blake " -x, --export-name=NAME expose export by name\n" 88b1a75b33SEric Blake " -D, --description=TEXT with -x, also export a human-readable description\n" 89b033cd86SPaolo Bonzini "\n" 90b033cd86SPaolo Bonzini "Exposing part of the image:\n" 91b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 92b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 93b033cd86SPaolo Bonzini "\n" 940ab3b337SDaniel P. Berrange "General purpose options:\n" 950ab3b337SDaniel P. Berrange " --object type,id=ID,... define an object such as 'secret' for providing\n" 960ab3b337SDaniel P. Berrange " passwords and/or encryption keys\n" 97*f7812df7SEric Blake " --tls-creds=ID use id of an earlier --object to provide TLS\n" 9839ca463eSDenis V. Lunev " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 9939ca463eSDenis V. Lunev " specify tracing options\n" 100ffb31e1dSMax Reitz " --fork fork off the server process and exit the parent\n" 101ffb31e1dSMax Reitz " once the server is running\n" 102b033cd86SPaolo Bonzini #ifdef __linux__ 103b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 104b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 105b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 106b033cd86SPaolo Bonzini "\n" 107b033cd86SPaolo Bonzini #endif 108b033cd86SPaolo Bonzini "\n" 109b033cd86SPaolo Bonzini "Block device options:\n" 1104323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 111b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 1128c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 1138c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 1148c116b0eSWenchao Xia " the temporary one\n" 1158c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 1168c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 1178c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 1188c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 1198c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 120b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 12139a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 12239a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 123b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 1246883de6cSAndrey Korolyov " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" 12577c9aaefSDaniel P. Berrange " --image-opts treat FILE as a full set of image options\n" 126b033cd86SPaolo Bonzini "\n" 127f5048cb7SEric Blake QEMU_HELP_BOTTOM "\n" 128c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1297a5ca864Sbellard } 1307a5ca864Sbellard 1317a5ca864Sbellard static void version(const char *name) 1327a5ca864Sbellard { 1337a5ca864Sbellard printf( 1347e563bfbSThomas Huth "%s " QEMU_FULL_VERSION "\n" 1357a5ca864Sbellard "Written by Anthony Liguori.\n" 1367a5ca864Sbellard "\n" 137be377133SEric Blake QEMU_COPYRIGHT "\n" 1387a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1397a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 140315bc7aaSths , name); 1417a5ca864Sbellard } 1427a5ca864Sbellard 1437a5ca864Sbellard struct partition_record 1447a5ca864Sbellard { 1457a5ca864Sbellard uint8_t bootable; 1467a5ca864Sbellard uint8_t start_head; 1477a5ca864Sbellard uint32_t start_cylinder; 1487a5ca864Sbellard uint8_t start_sector; 1497a5ca864Sbellard uint8_t system; 1507a5ca864Sbellard uint8_t end_head; 1517a5ca864Sbellard uint8_t end_cylinder; 1527a5ca864Sbellard uint8_t end_sector; 1537a5ca864Sbellard uint32_t start_sector_abs; 1547a5ca864Sbellard uint32_t nb_sectors_abs; 1557a5ca864Sbellard }; 1567a5ca864Sbellard 1577a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1587a5ca864Sbellard { 1597a5ca864Sbellard r->bootable = p[0]; 1607a5ca864Sbellard r->start_head = p[1]; 1617a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1627a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1637a5ca864Sbellard r->system = p[4]; 1647a5ca864Sbellard r->end_head = p[5]; 1657a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1667a5ca864Sbellard r->end_sector = p[6] & 0x3f; 167ac97393dSMax Reitz 168773dce3cSPeter Maydell r->start_sector_abs = ldl_le_p(p + 8); 169773dce3cSPeter Maydell r->nb_sectors_abs = ldl_le_p(p + 12); 1707a5ca864Sbellard } 1717a5ca864Sbellard 1724c58e80aSMax Reitz static int find_partition(BlockBackend *blk, int partition, 1737a5ca864Sbellard off_t *offset, off_t *size) 1747a5ca864Sbellard { 1757a5ca864Sbellard struct partition_record mbr[4]; 176bd31c214SEric Blake uint8_t data[MBR_SIZE]; 1777a5ca864Sbellard int i; 1787a5ca864Sbellard int ext_partnum = 4; 179cb7cf0e3SRyota Ozaki int ret; 1807a5ca864Sbellard 181bd31c214SEric Blake ret = blk_pread(blk, 0, data, sizeof(data)); 182bd31c214SEric Blake if (ret < 0) { 183a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 18485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 185cb7cf0e3SRyota Ozaki } 1867a5ca864Sbellard 1877a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 188185b4338SPaolo Bonzini return -EINVAL; 1897a5ca864Sbellard } 1907a5ca864Sbellard 1917a5ca864Sbellard for (i = 0; i < 4; i++) { 1927a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1937a5ca864Sbellard 194453b07b1SMax Reitz if (!mbr[i].system || !mbr[i].nb_sectors_abs) { 1957a5ca864Sbellard continue; 196453b07b1SMax Reitz } 1977a5ca864Sbellard 1987a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1997a5ca864Sbellard struct partition_record ext[4]; 200bd31c214SEric Blake uint8_t data1[MBR_SIZE]; 2017a5ca864Sbellard int j; 2027a5ca864Sbellard 203bd31c214SEric Blake ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, 204bd31c214SEric Blake data1, sizeof(data1)); 205bd31c214SEric Blake if (ret < 0) { 206a4699e55SMarkus Armbruster error_report("error while reading: %s", strerror(-ret)); 20785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 208cb7cf0e3SRyota Ozaki } 2097a5ca864Sbellard 2107a5ca864Sbellard for (j = 0; j < 4; j++) { 2117a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 212453b07b1SMax Reitz if (!ext[j].system || !ext[j].nb_sectors_abs) { 2137a5ca864Sbellard continue; 214453b07b1SMax Reitz } 2157a5ca864Sbellard 2167a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 2177a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 2187a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 2197a5ca864Sbellard return 0; 2207a5ca864Sbellard } 2217a5ca864Sbellard } 2227a5ca864Sbellard ext_partnum += 4; 2237a5ca864Sbellard } else if ((i + 1) == partition) { 2247a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 2257a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 2267a5ca864Sbellard return 0; 2277a5ca864Sbellard } 2287a5ca864Sbellard } 2297a5ca864Sbellard 230185b4338SPaolo Bonzini return -ENOENT; 2317a5ca864Sbellard } 2327a5ca864Sbellard 233bb345110SPaolo Bonzini static void termsig_handler(int signum) 234bb345110SPaolo Bonzini { 23523994a5fSPavel Butsykin atomic_cmpxchg(&state, RUNNING, TERMINATE); 236a61c6782SPaolo Bonzini qemu_notify_event(); 237bb345110SPaolo Bonzini } 238bb345110SPaolo Bonzini 239537b41f5SPaolo Bonzini 240a517e88bSPaolo Bonzini static void *show_parts(void *arg) 241cd831bd7Sths { 242a6ac2313SPaolo Bonzini char *device = arg; 243cd831bd7Sths int nbd; 244cd831bd7Sths 245cd831bd7Sths /* linux just needs an open() to trigger 246cd831bd7Sths * the partition table update 247cd831bd7Sths * but remember to load the module with max_part != 0 : 248cd831bd7Sths * modprobe nbd max_part=63 249cd831bd7Sths */ 250cd831bd7Sths nbd = open(device, O_RDWR); 251fc19f8a0SPaolo Bonzini if (nbd >= 0) { 252cd831bd7Sths close(nbd); 253cd831bd7Sths } 254a517e88bSPaolo Bonzini return NULL; 255a517e88bSPaolo Bonzini } 256a517e88bSPaolo Bonzini 257a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 258a517e88bSPaolo Bonzini { 259a6ac2313SPaolo Bonzini char *device = arg; 260081dd1feSEric Blake NBDExportInfo info = { .request_sizes = false, }; 261d0d6ff58SDaniel P. Berrange QIOChannelSocket *sioc; 262d0d6ff58SDaniel P. Berrange int fd; 263a517e88bSPaolo Bonzini int ret; 264a517e88bSPaolo Bonzini pthread_t show_parts_thread; 2651ce52846SMax Reitz Error *local_error = NULL; 266a517e88bSPaolo Bonzini 267d0d6ff58SDaniel P. Berrange sioc = qio_channel_socket_new(); 268d0d6ff58SDaniel P. Berrange if (qio_channel_socket_connect_sync(sioc, 269d0d6ff58SDaniel P. Berrange saddr, 270d0d6ff58SDaniel P. Berrange &local_error) < 0) { 27148bec07eSDaniel P. Berrange error_report_err(local_error); 272a517e88bSPaolo Bonzini goto out; 273a517e88bSPaolo Bonzini } 274a517e88bSPaolo Bonzini 275004a89fcSEric Blake ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, 276004a89fcSEric Blake NULL, NULL, NULL, &info, &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 291004a89fcSEric Blake ret = nbd_init(fd, sioc, &info, &local_error); 292fc19f8a0SPaolo Bonzini if (ret < 0) { 293be41c100SVladimir Sementsov-Ogievskiy error_report_err(local_error); 2940c544d73SPaolo Bonzini goto out_fd; 295a517e88bSPaolo Bonzini } 296a517e88bSPaolo Bonzini 297a517e88bSPaolo Bonzini /* update partition table */ 298a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 299a517e88bSPaolo Bonzini 300c1f8fdc3SPaolo Bonzini if (verbose) { 301a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 302a517e88bSPaolo Bonzini device, srcpath); 303c1f8fdc3SPaolo Bonzini } else { 304c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 305c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 306c1f8fdc3SPaolo Bonzini } 307a517e88bSPaolo Bonzini 308a517e88bSPaolo Bonzini ret = nbd_client(fd); 309a517e88bSPaolo Bonzini if (ret) { 3100c544d73SPaolo Bonzini goto out_fd; 311a517e88bSPaolo Bonzini } 312a517e88bSPaolo Bonzini close(fd); 313d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 314a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 315a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 316a517e88bSPaolo Bonzini 3170c544d73SPaolo Bonzini out_fd: 3180c544d73SPaolo Bonzini close(fd); 3190c544d73SPaolo Bonzini out_socket: 320d0d6ff58SDaniel P. Berrange object_unref(OBJECT(sioc)); 321a517e88bSPaolo Bonzini out: 322a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 323a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 324cd831bd7Sths } 325cd831bd7Sths 326e4afbf4fSFam Zheng static int nbd_can_accept(void) 327a61c6782SPaolo Bonzini { 328df8ad9f1SEric Blake return state == RUNNING && nb_fds < shared; 329a61c6782SPaolo Bonzini } 330a61c6782SPaolo Bonzini 3317860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3327860a380SPaolo Bonzini { 3337860a380SPaolo Bonzini assert(state == TERMINATING); 3347860a380SPaolo Bonzini state = TERMINATED; 3357860a380SPaolo Bonzini } 3367860a380SPaolo Bonzini 337d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void); 338e4afbf4fSFam Zheng 3390c9390d9SEric Blake static void nbd_client_closed(NBDClient *client, bool negotiated) 340a61c6782SPaolo Bonzini { 341a61c6782SPaolo Bonzini nb_fds--; 3420c9390d9SEric Blake if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { 3437860a380SPaolo Bonzini state = TERMINATE; 3447860a380SPaolo Bonzini } 345d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 3467860a380SPaolo Bonzini nbd_client_put(client); 347a61c6782SPaolo Bonzini } 348a61c6782SPaolo Bonzini 349e4849c1dSDaniel P. Berrange static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, 350e4849c1dSDaniel P. Berrange gpointer opaque) 351a61c6782SPaolo Bonzini { 3527860a380SPaolo Bonzini if (state >= TERMINATE) { 353e4849c1dSDaniel P. Berrange return; 3547860a380SPaolo Bonzini } 3557860a380SPaolo Bonzini 356a61c6782SPaolo Bonzini nb_fds++; 357d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 358f95910feSDaniel P. Berrange nbd_client_new(newproto ? NULL : exp, cioc, 359145614a1SDaniel P. Berrange tlscreds, NULL, nbd_client_closed); 360d0d6ff58SDaniel P. Berrange } 361d0d6ff58SDaniel P. Berrange 362d0d6ff58SDaniel P. Berrange static void nbd_update_server_watch(void) 363e4afbf4fSFam Zheng { 364e4afbf4fSFam Zheng if (nbd_can_accept()) { 365e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); 366e4afbf4fSFam Zheng } else { 367e4849c1dSDaniel P. Berrange qio_net_listener_set_client_func(server, NULL, NULL, NULL); 368e4afbf4fSFam Zheng } 369e4afbf4fSFam Zheng } 370e4afbf4fSFam Zheng 37148bec07eSDaniel P. Berrange 372bd269ebcSMarkus Armbruster static SocketAddress *nbd_build_socket_address(const char *sockpath, 37348bec07eSDaniel P. Berrange const char *bindto, 37448bec07eSDaniel P. Berrange const char *port) 37548bec07eSDaniel P. Berrange { 376bd269ebcSMarkus Armbruster SocketAddress *saddr; 37748bec07eSDaniel P. Berrange 378bd269ebcSMarkus Armbruster saddr = g_new0(SocketAddress, 1); 37948bec07eSDaniel P. Berrange if (sockpath) { 380bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_UNIX; 381bd269ebcSMarkus Armbruster saddr->u.q_unix.path = g_strdup(sockpath); 38248bec07eSDaniel P. Berrange } else { 3830399293eSEric Blake InetSocketAddress *inet; 384bd269ebcSMarkus Armbruster saddr->type = SOCKET_ADDRESS_TYPE_INET; 385bd269ebcSMarkus Armbruster inet = &saddr->u.inet; 3860399293eSEric Blake inet->host = g_strdup(bindto); 38748bec07eSDaniel P. Berrange if (port) { 3880399293eSEric Blake inet->port = g_strdup(port); 38948bec07eSDaniel P. Berrange } else { 3900399293eSEric Blake inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); 39148bec07eSDaniel P. Berrange } 39248bec07eSDaniel P. Berrange } 39348bec07eSDaniel P. Berrange 39448bec07eSDaniel P. Berrange return saddr; 39548bec07eSDaniel P. Berrange } 39648bec07eSDaniel P. Berrange 39748bec07eSDaniel P. Berrange 39877c9aaefSDaniel P. Berrange static QemuOptsList file_opts = { 39977c9aaefSDaniel P. Berrange .name = "file", 40077c9aaefSDaniel P. Berrange .implied_opt_name = "file", 40177c9aaefSDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), 40277c9aaefSDaniel P. Berrange .desc = { 40377c9aaefSDaniel P. Berrange /* no elements => accept any params */ 40477c9aaefSDaniel P. Berrange { /* end of list */ } 40577c9aaefSDaniel P. Berrange }, 40677c9aaefSDaniel P. Berrange }; 40777c9aaefSDaniel P. Berrange 4080ab3b337SDaniel P. Berrange static QemuOptsList qemu_object_opts = { 4090ab3b337SDaniel P. Berrange .name = "object", 4100ab3b337SDaniel P. Berrange .implied_opt_name = "qom-type", 4110ab3b337SDaniel P. Berrange .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 4120ab3b337SDaniel P. Berrange .desc = { 4130ab3b337SDaniel P. Berrange { } 4140ab3b337SDaniel P. Berrange }, 4150ab3b337SDaniel P. Berrange }; 4160ab3b337SDaniel P. Berrange 4170ab3b337SDaniel P. Berrange 418145614a1SDaniel P. Berrange 419145614a1SDaniel P. Berrange static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) 420145614a1SDaniel P. Berrange { 421145614a1SDaniel P. Berrange Object *obj; 422145614a1SDaniel P. Berrange QCryptoTLSCreds *creds; 423145614a1SDaniel P. Berrange 424145614a1SDaniel P. Berrange obj = object_resolve_path_component( 425145614a1SDaniel P. Berrange object_get_objects_root(), id); 426145614a1SDaniel P. Berrange if (!obj) { 427145614a1SDaniel P. Berrange error_setg(errp, "No TLS credentials with id '%s'", 428145614a1SDaniel P. Berrange id); 429145614a1SDaniel P. Berrange return NULL; 430145614a1SDaniel P. Berrange } 431145614a1SDaniel P. Berrange creds = (QCryptoTLSCreds *) 432145614a1SDaniel P. Berrange object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); 433145614a1SDaniel P. Berrange if (!creds) { 434145614a1SDaniel P. Berrange error_setg(errp, "Object with id '%s' is not TLS credentials", 435145614a1SDaniel P. Berrange id); 436145614a1SDaniel P. Berrange return NULL; 437145614a1SDaniel P. Berrange } 438145614a1SDaniel P. Berrange 439145614a1SDaniel P. Berrange if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 440145614a1SDaniel P. Berrange error_setg(errp, 441145614a1SDaniel P. Berrange "Expecting TLS credentials with a server endpoint"); 442145614a1SDaniel P. Berrange return NULL; 443145614a1SDaniel P. Berrange } 444145614a1SDaniel P. Berrange object_ref(obj); 445145614a1SDaniel P. Berrange return creds; 446145614a1SDaniel P. Berrange } 447145614a1SDaniel P. Berrange 448a721f53bSRichard W.M. Jones static void setup_address_and_port(const char **address, const char **port) 449a721f53bSRichard W.M. Jones { 450a721f53bSRichard W.M. Jones if (*address == NULL) { 451a721f53bSRichard W.M. Jones *address = "0.0.0.0"; 452a721f53bSRichard W.M. Jones } 453a721f53bSRichard W.M. Jones 454a721f53bSRichard W.M. Jones if (*port == NULL) { 455a721f53bSRichard W.M. Jones *port = stringify(NBD_DEFAULT_PORT); 456a721f53bSRichard W.M. Jones } 457a721f53bSRichard W.M. Jones } 458a721f53bSRichard W.M. Jones 459a721f53bSRichard W.M. Jones /* 460a721f53bSRichard W.M. Jones * Check socket parameters compatibility when socket activation is used. 461a721f53bSRichard W.M. Jones */ 462a721f53bSRichard W.M. Jones static const char *socket_activation_validate_opts(const char *device, 463a721f53bSRichard W.M. Jones const char *sockpath, 464a721f53bSRichard W.M. Jones const char *address, 465a721f53bSRichard W.M. Jones const char *port) 466a721f53bSRichard W.M. Jones { 467a721f53bSRichard W.M. Jones if (device != NULL) { 468a721f53bSRichard W.M. Jones return "NBD device can't be set when using socket activation"; 469a721f53bSRichard W.M. Jones } 470a721f53bSRichard W.M. Jones 471a721f53bSRichard W.M. Jones if (sockpath != NULL) { 472a721f53bSRichard W.M. Jones return "Unix socket can't be set when using socket activation"; 473a721f53bSRichard W.M. Jones } 474a721f53bSRichard W.M. Jones 475a721f53bSRichard W.M. Jones if (address != NULL) { 476a721f53bSRichard W.M. Jones return "The interface can't be set when using socket activation"; 477a721f53bSRichard W.M. Jones } 478a721f53bSRichard W.M. Jones 479a721f53bSRichard W.M. Jones if (port != NULL) { 480a721f53bSRichard W.M. Jones return "TCP port number can't be set when using socket activation"; 481a721f53bSRichard W.M. Jones } 482a721f53bSRichard W.M. Jones 483a721f53bSRichard W.M. Jones return NULL; 484a721f53bSRichard W.M. Jones } 485145614a1SDaniel P. Berrange 486b3b5299dSKevin Wolf static void qemu_nbd_shutdown(void) 487b3b5299dSKevin Wolf { 488b3b5299dSKevin Wolf job_cancel_sync_all(); 489b3b5299dSKevin Wolf bdrv_close_all(); 490b3b5299dSKevin Wolf } 491b3b5299dSKevin Wolf 4927a5ca864Sbellard int main(int argc, char **argv) 4937a5ca864Sbellard { 49426f54e9aSMarkus Armbruster BlockBackend *blk; 4957a5ca864Sbellard BlockDriverState *bs; 4967a5ca864Sbellard off_t dev_offset = 0; 4977423f417SEric Blake uint16_t nbdflags = 0; 498cd831bd7Sths bool disconnect = false; 499a721f53bSRichard W.M. Jones const char *bindto = NULL; 50048bec07eSDaniel P. Berrange const char *port = NULL; 50148bec07eSDaniel P. Berrange char *sockpath = NULL; 502a6ac2313SPaolo Bonzini char *device = NULL; 5037a5ca864Sbellard off_t fd_size; 5048c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 5058c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 506b1a75b33SEric Blake const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:"; 5077a5ca864Sbellard struct option lopt[] = { 508aa6e546cSDaniel P. Berrange { "help", no_argument, NULL, 'h' }, 509aa6e546cSDaniel P. Berrange { "version", no_argument, NULL, 'V' }, 510aa6e546cSDaniel P. Berrange { "bind", required_argument, NULL, 'b' }, 511aa6e546cSDaniel P. Berrange { "port", required_argument, NULL, 'p' }, 512aa6e546cSDaniel P. Berrange { "socket", required_argument, NULL, 'k' }, 513aa6e546cSDaniel P. Berrange { "offset", required_argument, NULL, 'o' }, 514aa6e546cSDaniel P. Berrange { "read-only", no_argument, NULL, 'r' }, 515aa6e546cSDaniel P. Berrange { "partition", required_argument, NULL, 'P' }, 516aa6e546cSDaniel P. Berrange { "connect", required_argument, NULL, 'c' }, 517aa6e546cSDaniel P. Berrange { "disconnect", no_argument, NULL, 'd' }, 518aa6e546cSDaniel P. Berrange { "snapshot", no_argument, NULL, 's' }, 519aa6e546cSDaniel P. Berrange { "load-snapshot", required_argument, NULL, 'l' }, 520aa6e546cSDaniel P. Berrange { "nocache", no_argument, NULL, 'n' }, 521aa6e546cSDaniel P. Berrange { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, 522aa6e546cSDaniel P. Berrange { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, 523aa6e546cSDaniel P. Berrange { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, 524aa6e546cSDaniel P. Berrange { "detect-zeroes", required_argument, NULL, 525aa6e546cSDaniel P. Berrange QEMU_NBD_OPT_DETECT_ZEROES }, 526aa6e546cSDaniel P. Berrange { "shared", required_argument, NULL, 'e' }, 527aa6e546cSDaniel P. Berrange { "format", required_argument, NULL, 'f' }, 528aa6e546cSDaniel P. Berrange { "persistent", no_argument, NULL, 't' }, 529aa6e546cSDaniel P. Berrange { "verbose", no_argument, NULL, 'v' }, 530aa6e546cSDaniel P. Berrange { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, 531aa6e546cSDaniel P. Berrange { "export-name", required_argument, NULL, 'x' }, 532b1a75b33SEric Blake { "description", required_argument, NULL, 'D' }, 533aa6e546cSDaniel P. Berrange { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, 534aa6e546cSDaniel P. Berrange { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, 53539ca463eSDenis V. Lunev { "trace", required_argument, NULL, 'T' }, 536ffb31e1dSMax Reitz { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, 537660f11beSBlue Swirl { NULL, 0, NULL, 0 } 5387a5ca864Sbellard }; 5397a5ca864Sbellard int ch; 5407a5ca864Sbellard int opt_ind = 0; 5417a5ca864Sbellard char *end; 542f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 5437a5ca864Sbellard int partition = -1; 5444fbec260SMax Reitz int ret = 0; 54539a5235cSPaolo Bonzini bool seen_cache = false; 546ded9d2d5SPaolo Bonzini bool seen_discard = false; 54739a5235cSPaolo Bonzini bool seen_aio = false; 548a517e88bSPaolo Bonzini pthread_t client_thread; 549e6b63677SDaniel P. Berrange const char *fmt = NULL; 55034b5d2c6SMax Reitz Error *local_err = NULL; 551b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 5524fbec260SMax Reitz QDict *options = NULL; 5533d4b2f9cSDaniel P. Berrange const char *export_name = NULL; 554b1a75b33SEric Blake const char *export_description = NULL; 555145614a1SDaniel P. Berrange const char *tlscredsid = NULL; 55677c9aaefSDaniel P. Berrange bool imageOpts = false; 5576effd5bfSKevin Wolf bool writethrough = true; 55839ca463eSDenis V. Lunev char *trace_file = NULL; 559ffb31e1dSMax Reitz bool fork_process = false; 560ffb31e1dSMax Reitz int old_stderr = -1; 561a721f53bSRichard W.M. Jones unsigned socket_activation; 5627a5ca864Sbellard 563a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 564a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 565a517e88bSPaolo Bonzini */ 566bb345110SPaolo Bonzini struct sigaction sa_sigterm; 567bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 568bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 569bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 570c2297088SDaniel P. Berrange 571041e32b8SMax Reitz #ifdef CONFIG_POSIX 572041e32b8SMax Reitz signal(SIGPIPE, SIG_IGN); 573041e32b8SMax Reitz #endif 574041e32b8SMax Reitz 575fe4db84dSDaniel P. Berrange module_call_init(MODULE_INIT_TRACE); 576e8f2d272SEduardo Habkost qcrypto_init(&error_fatal); 577c2297088SDaniel P. Berrange 5780ab3b337SDaniel P. Berrange module_call_init(MODULE_INIT_QOM); 5790ab3b337SDaniel P. Berrange qemu_add_opts(&qemu_object_opts); 58039ca463eSDenis V. Lunev qemu_add_opts(&qemu_trace_opts); 58110f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 582bb345110SPaolo Bonzini 5837a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 5847a5ca864Sbellard switch (ch) { 5857a5ca864Sbellard case 's': 5862f726488Sths flags |= BDRV_O_SNAPSHOT; 5872f726488Sths break; 5882f726488Sths case 'n': 58939a5235cSPaolo Bonzini optarg = (char *) "none"; 59039a5235cSPaolo Bonzini /* fallthrough */ 59139a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 59239a5235cSPaolo Bonzini if (seen_cache) { 59385b01e09SMarkus Armbruster error_report("-n and --cache can only be specified once"); 59485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 59539a5235cSPaolo Bonzini } 59639a5235cSPaolo Bonzini seen_cache = true; 5976effd5bfSKevin Wolf if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { 59885b01e09SMarkus Armbruster error_report("Invalid cache mode `%s'", optarg); 59985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60039a5235cSPaolo Bonzini } 6017a5ca864Sbellard break; 60239a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 60339a5235cSPaolo Bonzini if (seen_aio) { 60485b01e09SMarkus Armbruster error_report("--aio can only be specified once"); 60585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 60639a5235cSPaolo Bonzini } 60739a5235cSPaolo Bonzini seen_aio = true; 60839a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 60939a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 61039a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 61139a5235cSPaolo Bonzini /* this is the default */ 61239a5235cSPaolo Bonzini } else { 61385b01e09SMarkus Armbruster error_report("invalid aio mode `%s'", optarg); 61485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 61539a5235cSPaolo Bonzini } 61639a5235cSPaolo Bonzini break; 617ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 618ded9d2d5SPaolo Bonzini if (seen_discard) { 61985b01e09SMarkus Armbruster error_report("--discard can only be specified once"); 62085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 621ded9d2d5SPaolo Bonzini } 622ded9d2d5SPaolo Bonzini seen_discard = true; 623ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 62485b01e09SMarkus Armbruster error_report("Invalid discard mode `%s'", optarg); 62585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 626ded9d2d5SPaolo Bonzini } 627ded9d2d5SPaolo Bonzini break; 628b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 629b3838a40SPeter Lieven detect_zeroes = 630f7abe0ecSMarc-André Lureau qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, 631b3838a40SPeter Lieven optarg, 632b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 633b3838a40SPeter Lieven &local_err); 634b3838a40SPeter Lieven if (local_err) { 635c29b77f9SMarkus Armbruster error_reportf_err(local_err, 636c29b77f9SMarkus Armbruster "Failed to parse detect_zeroes mode: "); 63785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 638b3838a40SPeter Lieven } 639b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 640b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 64185b01e09SMarkus Armbruster error_report("setting detect-zeroes to unmap is not allowed " 642b3838a40SPeter Lieven "without setting discard operation to unmap"); 64385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 644b3838a40SPeter Lieven } 645b3838a40SPeter Lieven break; 6467a5ca864Sbellard case 'b': 6477a5ca864Sbellard bindto = optarg; 6487a5ca864Sbellard break; 6497a5ca864Sbellard case 'p': 65048bec07eSDaniel P. Berrange port = optarg; 6517a5ca864Sbellard break; 6527a5ca864Sbellard case 'o': 6537a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 6547a5ca864Sbellard if (*end) { 65585b01e09SMarkus Armbruster error_report("Invalid offset `%s'", optarg); 65685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6577a5ca864Sbellard } 6587a5ca864Sbellard if (dev_offset < 0) { 65985b01e09SMarkus Armbruster error_report("Offset must be positive `%s'", optarg); 66085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6617a5ca864Sbellard } 6627a5ca864Sbellard break; 6638c116b0eSWenchao Xia case 'l': 6648c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 66570b94331SMarkus Armbruster sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 66670b94331SMarkus Armbruster optarg, false); 6678c116b0eSWenchao Xia if (!sn_opts) { 66885b01e09SMarkus Armbruster error_report("Failed in parsing snapshot param `%s'", 6698c116b0eSWenchao Xia optarg); 67085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 6718c116b0eSWenchao Xia } 6728c116b0eSWenchao Xia } else { 6738c116b0eSWenchao Xia sn_id_or_name = optarg; 6748c116b0eSWenchao Xia } 6758c116b0eSWenchao Xia /* fall through */ 6767a5ca864Sbellard case 'r': 677b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 67807108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 6797a5ca864Sbellard break; 6807a5ca864Sbellard case 'P': 6817a5ca864Sbellard partition = strtol(optarg, &end, 0); 682713cc671SPeter Lieven if (*end) { 68385b01e09SMarkus Armbruster error_report("Invalid partition `%s'", optarg); 68485b01e09SMarkus Armbruster exit(EXIT_FAILURE); 685713cc671SPeter Lieven } 686713cc671SPeter Lieven if (partition < 1 || partition > 8) { 68785b01e09SMarkus Armbruster error_report("Invalid partition %d", partition); 68885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 689713cc671SPeter Lieven } 6907a5ca864Sbellard break; 691cd831bd7Sths case 'k': 692b32f6c28SPaolo Bonzini sockpath = optarg; 693713cc671SPeter Lieven if (sockpath[0] != '/') { 6949af9e0feSMarkus Armbruster error_report("socket path must be absolute"); 69585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 696713cc671SPeter Lieven } 697cd831bd7Sths break; 698cd831bd7Sths case 'd': 699cd831bd7Sths disconnect = true; 700cd831bd7Sths break; 701cd831bd7Sths case 'c': 702cd831bd7Sths device = optarg; 703cd831bd7Sths break; 7043b05a8e9Sths case 'e': 7053b05a8e9Sths shared = strtol(optarg, &end, 0); 7063b05a8e9Sths if (*end) { 70785b01e09SMarkus Armbruster error_report("Invalid shared device number '%s'", optarg); 70885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7093b05a8e9Sths } 7103b05a8e9Sths if (shared < 1) { 7119af9e0feSMarkus Armbruster error_report("Shared device number must be greater than 0"); 71285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7133b05a8e9Sths } 7143b05a8e9Sths break; 715e6b63677SDaniel P. Berrange case 'f': 716e6b63677SDaniel P. Berrange fmt = optarg; 717e6b63677SDaniel P. Berrange break; 71875818250Sths case 't': 71975818250Sths persistent = 1; 72075818250Sths break; 7213d4b2f9cSDaniel P. Berrange case 'x': 7223d4b2f9cSDaniel P. Berrange export_name = optarg; 7233d4b2f9cSDaniel P. Berrange break; 724b1a75b33SEric Blake case 'D': 725b1a75b33SEric Blake export_description = optarg; 726b1a75b33SEric Blake break; 7277a5ca864Sbellard case 'v': 7287a5ca864Sbellard verbose = 1; 7297a5ca864Sbellard break; 7307a5ca864Sbellard case 'V': 7317a5ca864Sbellard version(argv[0]); 7327a5ca864Sbellard exit(0); 7337a5ca864Sbellard break; 7347a5ca864Sbellard case 'h': 7357a5ca864Sbellard usage(argv[0]); 7367a5ca864Sbellard exit(0); 7377a5ca864Sbellard break; 7387a5ca864Sbellard case '?': 73985b01e09SMarkus Armbruster error_report("Try `%s --help' for more information.", argv[0]); 74085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7410ab3b337SDaniel P. Berrange case QEMU_NBD_OPT_OBJECT: { 7420ab3b337SDaniel P. Berrange QemuOpts *opts; 7430ab3b337SDaniel P. Berrange opts = qemu_opts_parse_noisily(&qemu_object_opts, 7440ab3b337SDaniel P. Berrange optarg, true); 7450ab3b337SDaniel P. Berrange if (!opts) { 7460ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7470ab3b337SDaniel P. Berrange } 7480ab3b337SDaniel P. Berrange } break; 749145614a1SDaniel P. Berrange case QEMU_NBD_OPT_TLSCREDS: 750145614a1SDaniel P. Berrange tlscredsid = optarg; 751145614a1SDaniel P. Berrange break; 75277c9aaefSDaniel P. Berrange case QEMU_NBD_OPT_IMAGE_OPTS: 75377c9aaefSDaniel P. Berrange imageOpts = true; 75477c9aaefSDaniel P. Berrange break; 75539ca463eSDenis V. Lunev case 'T': 75639ca463eSDenis V. Lunev g_free(trace_file); 75739ca463eSDenis V. Lunev trace_file = trace_opt_parse(optarg); 75839ca463eSDenis V. Lunev break; 759ffb31e1dSMax Reitz case QEMU_NBD_OPT_FORK: 760ffb31e1dSMax Reitz fork_process = true; 761ffb31e1dSMax Reitz break; 7627a5ca864Sbellard } 7637a5ca864Sbellard } 7647a5ca864Sbellard 7657a5ca864Sbellard if ((argc - optind) != 1) { 766433672b0SMarkus Armbruster error_report("Invalid number of arguments"); 767433672b0SMarkus Armbruster error_printf("Try `%s --help' for more information.\n", argv[0]); 76885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 7697a5ca864Sbellard } 7707a5ca864Sbellard 7710ab3b337SDaniel P. Berrange if (qemu_opts_foreach(&qemu_object_opts, 7720ab3b337SDaniel P. Berrange user_creatable_add_opts_foreach, 77351b9b478SMarkus Armbruster NULL, NULL)) { 7740ab3b337SDaniel P. Berrange exit(EXIT_FAILURE); 7750ab3b337SDaniel P. Berrange } 7760ab3b337SDaniel P. Berrange 77739ca463eSDenis V. Lunev if (!trace_init_backends()) { 77839ca463eSDenis V. Lunev exit(1); 77939ca463eSDenis V. Lunev } 78039ca463eSDenis V. Lunev trace_init_file(trace_file); 78139ca463eSDenis V. Lunev qemu_set_log(LOG_TRACE); 78239ca463eSDenis V. Lunev 783a721f53bSRichard W.M. Jones socket_activation = check_socket_activation(); 784a721f53bSRichard W.M. Jones if (socket_activation == 0) { 785a721f53bSRichard W.M. Jones setup_address_and_port(&bindto, &port); 786a721f53bSRichard W.M. Jones } else { 787a721f53bSRichard W.M. Jones /* Using socket activation - check user didn't use -p etc. */ 788a721f53bSRichard W.M. Jones const char *err_msg = socket_activation_validate_opts(device, sockpath, 789a721f53bSRichard W.M. Jones bindto, port); 790a721f53bSRichard W.M. Jones if (err_msg != NULL) { 791a721f53bSRichard W.M. Jones error_report("%s", err_msg); 792a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 793a721f53bSRichard W.M. Jones } 79453fabd4bSPaolo Bonzini 79553fabd4bSPaolo Bonzini /* qemu-nbd can only listen on a single socket. */ 79653fabd4bSPaolo Bonzini if (socket_activation > 1) { 79753fabd4bSPaolo Bonzini error_report("qemu-nbd does not support socket activation with %s > 1", 79853fabd4bSPaolo Bonzini "LISTEN_FDS"); 79953fabd4bSPaolo Bonzini exit(EXIT_FAILURE); 80053fabd4bSPaolo Bonzini } 801a721f53bSRichard W.M. Jones } 802a721f53bSRichard W.M. Jones 803145614a1SDaniel P. Berrange if (tlscredsid) { 804145614a1SDaniel P. Berrange if (sockpath) { 805145614a1SDaniel P. Berrange error_report("TLS is only supported with IPv4/IPv6"); 806145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 807145614a1SDaniel P. Berrange } 808145614a1SDaniel P. Berrange if (device) { 809145614a1SDaniel P. Berrange error_report("TLS is not supported with a host device"); 810145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 811145614a1SDaniel P. Berrange } 812145614a1SDaniel P. Berrange if (!export_name) { 813145614a1SDaniel P. Berrange /* Set the default NBD protocol export name, since 814145614a1SDaniel P. Berrange * we *must* use new style protocol for TLS */ 815145614a1SDaniel P. Berrange export_name = ""; 816145614a1SDaniel P. Berrange } 817145614a1SDaniel P. Berrange tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); 818145614a1SDaniel P. Berrange if (local_err) { 819145614a1SDaniel P. Berrange error_report("Failed to get TLS creds %s", 820145614a1SDaniel P. Berrange error_get_pretty(local_err)); 821145614a1SDaniel P. Berrange exit(EXIT_FAILURE); 822145614a1SDaniel P. Berrange } 823145614a1SDaniel P. Berrange } 824145614a1SDaniel P. Berrange 825cd831bd7Sths if (disconnect) { 826d0d6ff58SDaniel P. Berrange int nbdfd = open(argv[optind], O_RDWR); 827d0d6ff58SDaniel P. Berrange if (nbdfd < 0) { 82885b01e09SMarkus Armbruster error_report("Cannot open %s: %s", argv[optind], 82985b01e09SMarkus Armbruster strerror(errno)); 83085b01e09SMarkus Armbruster exit(EXIT_FAILURE); 831fc19f8a0SPaolo Bonzini } 832d0d6ff58SDaniel P. Berrange nbd_disconnect(nbdfd); 833cd831bd7Sths 834d0d6ff58SDaniel P. Berrange close(nbdfd); 835cd831bd7Sths 836cd831bd7Sths printf("%s disconnected\n", argv[optind]); 837cd831bd7Sths 838cd831bd7Sths return 0; 839cd831bd7Sths } 840cd831bd7Sths 841ffb31e1dSMax Reitz if ((device && !verbose) || fork_process) { 842c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 843c1f8fdc3SPaolo Bonzini pid_t pid; 844c1f8fdc3SPaolo Bonzini int ret; 845c1f8fdc3SPaolo Bonzini 846fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 84785b01e09SMarkus Armbruster error_report("Error setting up communication pipe: %s", 84885b01e09SMarkus Armbruster strerror(errno)); 84985b01e09SMarkus Armbruster exit(EXIT_FAILURE); 850c1f8fdc3SPaolo Bonzini } 851c1f8fdc3SPaolo Bonzini 852c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 853c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 854c1f8fdc3SPaolo Bonzini */ 855c1f8fdc3SPaolo Bonzini pid = fork(); 85670d4739eSMax Reitz if (pid < 0) { 85785b01e09SMarkus Armbruster error_report("Failed to fork: %s", strerror(errno)); 85885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 85970d4739eSMax Reitz } else if (pid == 0) { 860c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 8619faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 862c1f8fdc3SPaolo Bonzini 863c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 864ffb31e1dSMax Reitz old_stderr = dup(STDERR_FILENO); 865c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 866fc19f8a0SPaolo Bonzini if (ret < 0) { 86785b01e09SMarkus Armbruster error_report("Failed to daemonize: %s", strerror(errno)); 86885b01e09SMarkus Armbruster exit(EXIT_FAILURE); 869c1f8fdc3SPaolo Bonzini } 870c1f8fdc3SPaolo Bonzini 871c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 872c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 873c1f8fdc3SPaolo Bonzini } else { 874c1f8fdc3SPaolo Bonzini bool errors = false; 875c1f8fdc3SPaolo Bonzini char *buf; 876c1f8fdc3SPaolo Bonzini 877c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 878c1f8fdc3SPaolo Bonzini * it closes the pipe. 879c1f8fdc3SPaolo Bonzini */ 880c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 881c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 882c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 883c1f8fdc3SPaolo Bonzini errors = true; 884c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 885fc19f8a0SPaolo Bonzini if (ret < 0) { 886c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 887c1f8fdc3SPaolo Bonzini } 888c1f8fdc3SPaolo Bonzini } 889fc19f8a0SPaolo Bonzini if (ret < 0) { 89085b01e09SMarkus Armbruster error_report("Cannot read from daemon: %s", 89185b01e09SMarkus Armbruster strerror(errno)); 89285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 893c1f8fdc3SPaolo Bonzini } 894c1f8fdc3SPaolo Bonzini 895c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 896c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 897c1f8fdc3SPaolo Bonzini */ 898c1f8fdc3SPaolo Bonzini exit(errors); 899c1f8fdc3SPaolo Bonzini } 900c1f8fdc3SPaolo Bonzini } 901c1f8fdc3SPaolo Bonzini 902a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 903b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 904b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 905cd831bd7Sths } 906cd831bd7Sths 907e4849c1dSDaniel P. Berrange server = qio_net_listener_new(); 908a721f53bSRichard W.M. Jones if (socket_activation == 0) { 90948bec07eSDaniel P. Berrange saddr = nbd_build_socket_address(sockpath, bindto, port); 910e4849c1dSDaniel P. Berrange if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { 911e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 912a721f53bSRichard W.M. Jones error_report_err(local_err); 913e4849c1dSDaniel P. Berrange exit(EXIT_FAILURE); 914a721f53bSRichard W.M. Jones } 915a721f53bSRichard W.M. Jones } else { 916e4849c1dSDaniel P. Berrange size_t i; 917a721f53bSRichard W.M. Jones /* See comment in check_socket_activation above. */ 918e4849c1dSDaniel P. Berrange for (i = 0; i < socket_activation; i++) { 919e4849c1dSDaniel P. Berrange QIOChannelSocket *sioc; 920e4849c1dSDaniel P. Berrange sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, 921a721f53bSRichard W.M. Jones &local_err); 922e4849c1dSDaniel P. Berrange if (sioc == NULL) { 923e4849c1dSDaniel P. Berrange object_unref(OBJECT(server)); 924a721f53bSRichard W.M. Jones error_report("Failed to use socket activation: %s", 925a721f53bSRichard W.M. Jones error_get_pretty(local_err)); 926a721f53bSRichard W.M. Jones exit(EXIT_FAILURE); 927a721f53bSRichard W.M. Jones } 928e4849c1dSDaniel P. Berrange qio_net_listener_add(server, sioc); 929e4849c1dSDaniel P. Berrange object_unref(OBJECT(sioc)); 930e4849c1dSDaniel P. Berrange } 931a721f53bSRichard W.M. Jones } 93248bec07eSDaniel P. Berrange 9332f78e491SChrysostomos Nanakos if (qemu_init_main_loop(&local_err)) { 934565f65d2SMarkus Armbruster error_report_err(local_err); 9352f78e491SChrysostomos Nanakos exit(EXIT_FAILURE); 9362f78e491SChrysostomos Nanakos } 937802ddc37SPaolo Bonzini bdrv_init(); 938b3b5299dSKevin Wolf atexit(qemu_nbd_shutdown); 939802ddc37SPaolo Bonzini 94077c9aaefSDaniel P. Berrange srcpath = argv[optind]; 94177c9aaefSDaniel P. Berrange if (imageOpts) { 94277c9aaefSDaniel P. Berrange QemuOpts *opts; 94377c9aaefSDaniel P. Berrange if (fmt) { 94477c9aaefSDaniel P. Berrange error_report("--image-opts and -f are mutually exclusive"); 94577c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 94677c9aaefSDaniel P. Berrange } 94777c9aaefSDaniel P. Berrange opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); 94877c9aaefSDaniel P. Berrange if (!opts) { 94977c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 95077c9aaefSDaniel P. Berrange exit(EXIT_FAILURE); 95177c9aaefSDaniel P. Berrange } 95277c9aaefSDaniel P. Berrange options = qemu_opts_to_qdict(opts, NULL); 95377c9aaefSDaniel P. Berrange qemu_opts_reset(&file_opts); 954efaa7c4eSMax Reitz blk = blk_new_open(NULL, NULL, options, flags, &local_err); 95577c9aaefSDaniel P. Berrange } else { 956e6b63677SDaniel P. Berrange if (fmt) { 9574fbec260SMax Reitz options = qdict_new(); 95846f5ac20SEric Blake qdict_put_str(options, "driver", fmt); 959e6b63677SDaniel P. Berrange } 960efaa7c4eSMax Reitz blk = blk_new_open(srcpath, NULL, options, flags, &local_err); 96177c9aaefSDaniel P. Berrange } 96277c9aaefSDaniel P. Berrange 9634fbec260SMax Reitz if (!blk) { 964c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to blk_new_open '%s': ", 965c29b77f9SMarkus Armbruster argv[optind]); 96685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 967802ddc37SPaolo Bonzini } 9684fbec260SMax Reitz bs = blk_bs(blk); 969802ddc37SPaolo Bonzini 9706effd5bfSKevin Wolf blk_set_enable_write_cache(blk, !writethrough); 9716effd5bfSKevin Wolf 9728c116b0eSWenchao Xia if (sn_opts) { 9738c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 9748c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 9758c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 9768c116b0eSWenchao Xia &local_err); 9778c116b0eSWenchao Xia } else if (sn_id_or_name) { 9788c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 9798c116b0eSWenchao Xia &local_err); 9808c116b0eSWenchao Xia } 9818c116b0eSWenchao Xia if (ret < 0) { 982c29b77f9SMarkus Armbruster error_reportf_err(local_err, "Failed to load snapshot: "); 98385b01e09SMarkus Armbruster exit(EXIT_FAILURE); 9848c116b0eSWenchao Xia } 9858c116b0eSWenchao Xia 986b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 9874c58e80aSMax Reitz fd_size = blk_getlength(blk); 98898f44bbeSMax Reitz if (fd_size < 0) { 98985b01e09SMarkus Armbruster error_report("Failed to determine the image length: %s", 99098f44bbeSMax Reitz strerror(-fd_size)); 99185b01e09SMarkus Armbruster exit(EXIT_FAILURE); 99298f44bbeSMax Reitz } 993802ddc37SPaolo Bonzini 994e424b655STomáš Golembiovský if (dev_offset >= fd_size) { 995e424b655STomáš Golembiovský error_report("Offset (%lld) has to be smaller than the image size " 996e424b655STomáš Golembiovský "(%lld)", 997e424b655STomáš Golembiovský (long long int)dev_offset, (long long int)fd_size); 998e424b655STomáš Golembiovský exit(EXIT_FAILURE); 999e424b655STomáš Golembiovský } 1000e424b655STomáš Golembiovský fd_size -= dev_offset; 1001e424b655STomáš Golembiovský 1002185b4338SPaolo Bonzini if (partition != -1) { 10034c58e80aSMax Reitz ret = find_partition(blk, partition, &dev_offset, &fd_size); 1004185b4338SPaolo Bonzini if (ret < 0) { 100585b01e09SMarkus Armbruster error_report("Could not find partition %d: %s", partition, 1006a4699e55SMarkus Armbruster strerror(-ret)); 100785b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1008802ddc37SPaolo Bonzini } 1009185b4338SPaolo Bonzini } 1010802ddc37SPaolo Bonzini 1011cd7fca95SKevin Wolf exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, 1012cd7fca95SKevin Wolf writethrough, NULL, &local_err); 101398f44bbeSMax Reitz if (!exp) { 10144fffeb5eSMarkus Armbruster error_report_err(local_err); 101585b01e09SMarkus Armbruster exit(EXIT_FAILURE); 101698f44bbeSMax Reitz } 10173d4b2f9cSDaniel P. Berrange if (export_name) { 10183d4b2f9cSDaniel P. Berrange nbd_export_set_name(exp, export_name); 1019b1a75b33SEric Blake nbd_export_set_description(exp, export_description); 10203d4b2f9cSDaniel P. Berrange newproto = true; 1021b1a75b33SEric Blake } else if (export_description) { 1022b1a75b33SEric Blake error_report("Export description requires an export name"); 1023b1a75b33SEric Blake exit(EXIT_FAILURE); 10243d4b2f9cSDaniel P. Berrange } 10253b05a8e9Sths 1026f1ef5555SPaolo Bonzini if (device) { 1027f1ef5555SPaolo Bonzini int ret; 1028f1ef5555SPaolo Bonzini 1029a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 1030f1ef5555SPaolo Bonzini if (ret != 0) { 103185b01e09SMarkus Armbruster error_report("Failed to create client thread: %s", strerror(ret)); 103285b01e09SMarkus Armbruster exit(EXIT_FAILURE); 1033f1ef5555SPaolo Bonzini } 1034f1ef5555SPaolo Bonzini } else { 1035f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 1036f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 1037f1ef5555SPaolo Bonzini } 1038f1ef5555SPaolo Bonzini 1039d0d6ff58SDaniel P. Berrange nbd_update_server_watch(); 10407a5ca864Sbellard 10419faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 10429faf31b6SMichael Tokarev * to free any busy filesystems */ 10439faf31b6SMichael Tokarev if (chdir("/") < 0) { 104485b01e09SMarkus Armbruster error_report("Could not chdir to root directory: %s", 104585b01e09SMarkus Armbruster strerror(errno)); 104685b01e09SMarkus Armbruster exit(EXIT_FAILURE); 10479faf31b6SMichael Tokarev } 10489faf31b6SMichael Tokarev 1049ffb31e1dSMax Reitz if (fork_process) { 1050ffb31e1dSMax Reitz dup2(old_stderr, STDERR_FILENO); 1051ffb31e1dSMax Reitz close(old_stderr); 1052ffb31e1dSMax Reitz } 1053ffb31e1dSMax Reitz 10547860a380SPaolo Bonzini state = RUNNING; 10553b05a8e9Sths do { 1056a61c6782SPaolo Bonzini main_loop_wait(false); 10577860a380SPaolo Bonzini if (state == TERMINATE) { 10587860a380SPaolo Bonzini state = TERMINATING; 1059af49bbbeSPaolo Bonzini nbd_export_close(exp); 10602c8d9f06SPaolo Bonzini nbd_export_put(exp); 10617860a380SPaolo Bonzini exp = NULL; 10627860a380SPaolo Bonzini } 10637860a380SPaolo Bonzini } while (state != TERMINATED); 10642c8d9f06SPaolo Bonzini 106526f54e9aSMarkus Armbruster blk_unref(blk); 1066b32f6c28SPaolo Bonzini if (sockpath) { 1067b32f6c28SPaolo Bonzini unlink(sockpath); 1068b32f6c28SPaolo Bonzini } 10697a5ca864Sbellard 10708c116b0eSWenchao Xia qemu_opts_del(sn_opts); 10718c116b0eSWenchao Xia 1072a517e88bSPaolo Bonzini if (device) { 1073a517e88bSPaolo Bonzini void *ret; 1074a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 1075a517e88bSPaolo Bonzini exit(ret != NULL); 1076a517e88bSPaolo Bonzini } else { 1077a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 1078a517e88bSPaolo Bonzini } 10797a5ca864Sbellard } 1080