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 16*8167ee88SBlue Swirl * along with this program; if not, see <http://www.gnu.org/licenses/>. 177a5ca864Sbellard */ 187a5ca864Sbellard 197a5ca864Sbellard #include <qemu-common.h> 207a5ca864Sbellard #include "block_int.h" 217a5ca864Sbellard #include "nbd.h" 227a5ca864Sbellard 237a5ca864Sbellard #include <stdarg.h> 247a5ca864Sbellard #include <stdio.h> 257a5ca864Sbellard #include <getopt.h> 267a5ca864Sbellard #include <err.h> 27cd831bd7Sths #include <sys/types.h> 287a5ca864Sbellard #include <sys/socket.h> 297a5ca864Sbellard #include <netinet/in.h> 307a5ca864Sbellard #include <netinet/tcp.h> 317a5ca864Sbellard #include <arpa/inet.h> 32cd831bd7Sths #include <signal.h> 33cd831bd7Sths 34cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 357a5ca864Sbellard 362f726488Sths #define NBD_BUFFER_SIZE (1024*1024) 372f726488Sths 38b1d8e52eSblueswir1 static int verbose; 397a5ca864Sbellard 407a5ca864Sbellard static void usage(const char *name) 417a5ca864Sbellard { 427a5ca864Sbellard printf( 437a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 447a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 457a5ca864Sbellard "\n" 467a5ca864Sbellard " -p, --port=PORT port to listen on (default `1024')\n" 477a5ca864Sbellard " -o, --offset=OFFSET offset into the image\n" 487a5ca864Sbellard " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 49cd831bd7Sths " -k, --socket=PATH path to the unix socket\n" 50cd831bd7Sths " (default '"SOCKET_PATH"')\n" 517a5ca864Sbellard " -r, --read-only export read-only\n" 527a5ca864Sbellard " -P, --partition=NUM only expose partition NUM\n" 532f726488Sths " -s, --snapshot use snapshot file\n" 542f726488Sths " -n, --nocache disable host cache\n" 55cd831bd7Sths " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 56cd831bd7Sths " -d, --disconnect disconnect the specified device\n" 573b05a8e9Sths " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 5875818250Sths " -t, --persistent don't exit on the last connection\n" 597a5ca864Sbellard " -v, --verbose display extra debugging information\n" 607a5ca864Sbellard " -h, --help display this help and exit\n" 617a5ca864Sbellard " -V, --version output version information and exit\n" 627a5ca864Sbellard "\n" 637a5ca864Sbellard "Report bugs to <anthony@codemonkey.ws>\n" 64cd831bd7Sths , name, "DEVICE"); 657a5ca864Sbellard } 667a5ca864Sbellard 677a5ca864Sbellard static void version(const char *name) 687a5ca864Sbellard { 697a5ca864Sbellard printf( 70315bc7aaSths "%s version 0.0.1\n" 717a5ca864Sbellard "Written by Anthony Liguori.\n" 727a5ca864Sbellard "\n" 737a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 747a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 757a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 76315bc7aaSths , name); 777a5ca864Sbellard } 787a5ca864Sbellard 797a5ca864Sbellard struct partition_record 807a5ca864Sbellard { 817a5ca864Sbellard uint8_t bootable; 827a5ca864Sbellard uint8_t start_head; 837a5ca864Sbellard uint32_t start_cylinder; 847a5ca864Sbellard uint8_t start_sector; 857a5ca864Sbellard uint8_t system; 867a5ca864Sbellard uint8_t end_head; 877a5ca864Sbellard uint8_t end_cylinder; 887a5ca864Sbellard uint8_t end_sector; 897a5ca864Sbellard uint32_t start_sector_abs; 907a5ca864Sbellard uint32_t nb_sectors_abs; 917a5ca864Sbellard }; 927a5ca864Sbellard 937a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 947a5ca864Sbellard { 957a5ca864Sbellard r->bootable = p[0]; 967a5ca864Sbellard r->start_head = p[1]; 977a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 987a5ca864Sbellard r->start_sector = p[2] & 0x3f; 997a5ca864Sbellard r->system = p[4]; 1007a5ca864Sbellard r->end_head = p[5]; 1017a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1027a5ca864Sbellard r->end_sector = p[6] & 0x3f; 1037a5ca864Sbellard r->start_sector_abs = p[8] | p[9] << 8 | p[10] << 16 | p[11] << 24; 1047a5ca864Sbellard r->nb_sectors_abs = p[12] | p[13] << 8 | p[14] << 16 | p[15] << 24; 1057a5ca864Sbellard } 1067a5ca864Sbellard 1077a5ca864Sbellard static int find_partition(BlockDriverState *bs, int partition, 1087a5ca864Sbellard off_t *offset, off_t *size) 1097a5ca864Sbellard { 1107a5ca864Sbellard struct partition_record mbr[4]; 1117a5ca864Sbellard uint8_t data[512]; 1127a5ca864Sbellard int i; 1137a5ca864Sbellard int ext_partnum = 4; 1147a5ca864Sbellard 1157a5ca864Sbellard if (bdrv_read(bs, 0, data, 1)) 1167a5ca864Sbellard errx(EINVAL, "error while reading"); 1177a5ca864Sbellard 1187a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 1197a5ca864Sbellard errno = -EINVAL; 1207a5ca864Sbellard return -1; 1217a5ca864Sbellard } 1227a5ca864Sbellard 1237a5ca864Sbellard for (i = 0; i < 4; i++) { 1247a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1257a5ca864Sbellard 1267a5ca864Sbellard if (!mbr[i].nb_sectors_abs) 1277a5ca864Sbellard continue; 1287a5ca864Sbellard 1297a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1307a5ca864Sbellard struct partition_record ext[4]; 1317a5ca864Sbellard uint8_t data1[512]; 1327a5ca864Sbellard int j; 1337a5ca864Sbellard 1347a5ca864Sbellard if (bdrv_read(bs, mbr[i].start_sector_abs, data1, 1)) 1357a5ca864Sbellard errx(EINVAL, "error while reading"); 1367a5ca864Sbellard 1377a5ca864Sbellard for (j = 0; j < 4; j++) { 1387a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 1397a5ca864Sbellard if (!ext[j].nb_sectors_abs) 1407a5ca864Sbellard continue; 1417a5ca864Sbellard 1427a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 1437a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 1447a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 1457a5ca864Sbellard return 0; 1467a5ca864Sbellard } 1477a5ca864Sbellard } 1487a5ca864Sbellard ext_partnum += 4; 1497a5ca864Sbellard } else if ((i + 1) == partition) { 1507a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 1517a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 1527a5ca864Sbellard return 0; 1537a5ca864Sbellard } 1547a5ca864Sbellard } 1557a5ca864Sbellard 1567a5ca864Sbellard errno = -ENOENT; 1577a5ca864Sbellard return -1; 1587a5ca864Sbellard } 1597a5ca864Sbellard 160cd831bd7Sths static void show_parts(const char *device) 161cd831bd7Sths { 162cd831bd7Sths if (fork() == 0) { 163cd831bd7Sths int nbd; 164cd831bd7Sths 165cd831bd7Sths /* linux just needs an open() to trigger 166cd831bd7Sths * the partition table update 167cd831bd7Sths * but remember to load the module with max_part != 0 : 168cd831bd7Sths * modprobe nbd max_part=63 169cd831bd7Sths */ 170cd831bd7Sths nbd = open(device, O_RDWR); 171cd831bd7Sths if (nbd != -1) 172cd831bd7Sths close(nbd); 173cd831bd7Sths exit(0); 174cd831bd7Sths } 175cd831bd7Sths } 176cd831bd7Sths 1777a5ca864Sbellard int main(int argc, char **argv) 1787a5ca864Sbellard { 1797a5ca864Sbellard BlockDriverState *bs; 1807a5ca864Sbellard off_t dev_offset = 0; 1817a5ca864Sbellard off_t offset = 0; 1827a5ca864Sbellard bool readonly = false; 183cd831bd7Sths bool disconnect = false; 1847a5ca864Sbellard const char *bindto = "0.0.0.0"; 1857a5ca864Sbellard int port = 1024; 1867a5ca864Sbellard struct sockaddr_in addr; 1877a5ca864Sbellard socklen_t addr_len = sizeof(addr); 1887a5ca864Sbellard off_t fd_size; 189cd831bd7Sths char *device = NULL; 190cd831bd7Sths char *socket = NULL; 191cd831bd7Sths char sockpath[128]; 192d6aa671fSaliguori const char *sopt = "hVb:o:p:rsnP:c:dvk:e:t"; 1937a5ca864Sbellard struct option lopt[] = { 1947a5ca864Sbellard { "help", 0, 0, 'h' }, 1957a5ca864Sbellard { "version", 0, 0, 'V' }, 1967a5ca864Sbellard { "bind", 1, 0, 'b' }, 1977a5ca864Sbellard { "port", 1, 0, 'p' }, 198cd831bd7Sths { "socket", 1, 0, 'k' }, 1997a5ca864Sbellard { "offset", 1, 0, 'o' }, 2007a5ca864Sbellard { "read-only", 0, 0, 'r' }, 2017a5ca864Sbellard { "partition", 1, 0, 'P' }, 202cd831bd7Sths { "connect", 1, 0, 'c' }, 203cd831bd7Sths { "disconnect", 0, 0, 'd' }, 2047a5ca864Sbellard { "snapshot", 0, 0, 's' }, 2052f726488Sths { "nocache", 0, 0, 'n' }, 2063b05a8e9Sths { "shared", 1, 0, 'e' }, 20775818250Sths { "persistent", 0, 0, 't' }, 2087a5ca864Sbellard { "verbose", 0, 0, 'v' }, 209975b092bSths { NULL, 0, 0, 0 } 2107a5ca864Sbellard }; 2117a5ca864Sbellard int ch; 2127a5ca864Sbellard int opt_ind = 0; 2137a5ca864Sbellard int li; 2147a5ca864Sbellard char *end; 2152f726488Sths int flags = 0; 2167a5ca864Sbellard int partition = -1; 217cd831bd7Sths int ret; 2183b05a8e9Sths int shared = 1; 2192f726488Sths uint8_t *data; 2203b05a8e9Sths fd_set fds; 2213b05a8e9Sths int *sharing_fds; 2223b05a8e9Sths int fd; 2233b05a8e9Sths int i; 2243b05a8e9Sths int nb_fds = 0; 2253b05a8e9Sths int max_fd; 22675818250Sths int persistent = 0; 2277a5ca864Sbellard 2287a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 2297a5ca864Sbellard switch (ch) { 2307a5ca864Sbellard case 's': 2312f726488Sths flags |= BDRV_O_SNAPSHOT; 2322f726488Sths break; 2332f726488Sths case 'n': 2349f7965c7Saliguori flags |= BDRV_O_NOCACHE; 2357a5ca864Sbellard break; 2367a5ca864Sbellard case 'b': 2377a5ca864Sbellard bindto = optarg; 2387a5ca864Sbellard break; 2397a5ca864Sbellard case 'p': 2407a5ca864Sbellard li = strtol(optarg, &end, 0); 2417a5ca864Sbellard if (*end) { 2427a5ca864Sbellard errx(EINVAL, "Invalid port `%s'", optarg); 2437a5ca864Sbellard } 2447a5ca864Sbellard if (li < 1 || li > 65535) { 2457a5ca864Sbellard errx(EINVAL, "Port out of range `%s'", optarg); 2467a5ca864Sbellard } 2477a5ca864Sbellard port = (uint16_t)li; 2487a5ca864Sbellard break; 2497a5ca864Sbellard case 'o': 2507a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 2517a5ca864Sbellard if (*end) { 2527a5ca864Sbellard errx(EINVAL, "Invalid offset `%s'", optarg); 2537a5ca864Sbellard } 2547a5ca864Sbellard if (dev_offset < 0) { 2557a5ca864Sbellard errx(EINVAL, "Offset must be positive `%s'", optarg); 2567a5ca864Sbellard } 2577a5ca864Sbellard break; 2587a5ca864Sbellard case 'r': 2597a5ca864Sbellard readonly = true; 2607a5ca864Sbellard break; 2617a5ca864Sbellard case 'P': 2627a5ca864Sbellard partition = strtol(optarg, &end, 0); 2637a5ca864Sbellard if (*end) 2647a5ca864Sbellard errx(EINVAL, "Invalid partition `%s'", optarg); 2657a5ca864Sbellard if (partition < 1 || partition > 8) 2667a5ca864Sbellard errx(EINVAL, "Invalid partition %d", partition); 2677a5ca864Sbellard break; 268cd831bd7Sths case 'k': 269cd831bd7Sths socket = optarg; 270cd831bd7Sths if (socket[0] != '/') 271cd831bd7Sths errx(EINVAL, "socket path must be absolute\n"); 272cd831bd7Sths break; 273cd831bd7Sths case 'd': 274cd831bd7Sths disconnect = true; 275cd831bd7Sths break; 276cd831bd7Sths case 'c': 277cd831bd7Sths device = optarg; 278cd831bd7Sths break; 2793b05a8e9Sths case 'e': 2803b05a8e9Sths shared = strtol(optarg, &end, 0); 2813b05a8e9Sths if (*end) { 2823b05a8e9Sths errx(EINVAL, "Invalid shared device number '%s'", optarg); 2833b05a8e9Sths } 2843b05a8e9Sths if (shared < 1) { 2853b05a8e9Sths errx(EINVAL, "Shared device number must be greater than 0\n"); 2863b05a8e9Sths } 2873b05a8e9Sths break; 28875818250Sths case 't': 28975818250Sths persistent = 1; 29075818250Sths break; 2917a5ca864Sbellard case 'v': 2927a5ca864Sbellard verbose = 1; 2937a5ca864Sbellard break; 2947a5ca864Sbellard case 'V': 2957a5ca864Sbellard version(argv[0]); 2967a5ca864Sbellard exit(0); 2977a5ca864Sbellard break; 2987a5ca864Sbellard case 'h': 2997a5ca864Sbellard usage(argv[0]); 3007a5ca864Sbellard exit(0); 3017a5ca864Sbellard break; 3027a5ca864Sbellard case '?': 3037a5ca864Sbellard errx(EINVAL, "Try `%s --help' for more information.", 3047a5ca864Sbellard argv[0]); 3057a5ca864Sbellard } 3067a5ca864Sbellard } 3077a5ca864Sbellard 3087a5ca864Sbellard if ((argc - optind) != 1) { 3097a5ca864Sbellard errx(EINVAL, "Invalid number of argument.\n" 3107a5ca864Sbellard "Try `%s --help' for more information.", 3117a5ca864Sbellard argv[0]); 3127a5ca864Sbellard } 3137a5ca864Sbellard 314cd831bd7Sths if (disconnect) { 315cd831bd7Sths fd = open(argv[optind], O_RDWR); 316cd831bd7Sths if (fd == -1) 317cd831bd7Sths errx(errno, "Cannot open %s", argv[optind]); 318cd831bd7Sths 319cd831bd7Sths nbd_disconnect(fd); 320cd831bd7Sths 321cd831bd7Sths close(fd); 322cd831bd7Sths 323cd831bd7Sths printf("%s disconnected\n", argv[optind]); 324cd831bd7Sths 325cd831bd7Sths return 0; 326cd831bd7Sths } 327cd831bd7Sths 3287a5ca864Sbellard bdrv_init(); 3297a5ca864Sbellard 3307a5ca864Sbellard bs = bdrv_new("hda"); 3317a5ca864Sbellard if (bs == NULL) 3327a5ca864Sbellard return 1; 3337a5ca864Sbellard 3342f726488Sths if (bdrv_open(bs, argv[optind], flags) == -1) 3357a5ca864Sbellard return 1; 3367a5ca864Sbellard 3377a5ca864Sbellard fd_size = bs->total_sectors * 512; 3387a5ca864Sbellard 3397a5ca864Sbellard if (partition != -1 && 3407a5ca864Sbellard find_partition(bs, partition, &dev_offset, &fd_size)) 3417a5ca864Sbellard errx(errno, "Could not find partition %d", partition); 3427a5ca864Sbellard 343cd831bd7Sths if (device) { 344cd831bd7Sths pid_t pid; 3453b05a8e9Sths int sock; 3463b05a8e9Sths 347f5de141bSAnthony Liguori if (!verbose) { 348f5de141bSAnthony Liguori /* detach client and server */ 349f5de141bSAnthony Liguori if (daemon(0, 0) == -1) { 350f5de141bSAnthony Liguori errx(errno, "Failed to daemonize"); 351f5de141bSAnthony Liguori } 352f5de141bSAnthony Liguori } 353cd831bd7Sths 354cd831bd7Sths if (socket == NULL) { 355cd831bd7Sths sprintf(sockpath, SOCKET_PATH, basename(device)); 356cd831bd7Sths socket = sockpath; 357cd831bd7Sths } 358cd831bd7Sths 359cd831bd7Sths pid = fork(); 360cd831bd7Sths if (pid < 0) 361cd831bd7Sths return 1; 362cd831bd7Sths if (pid != 0) { 363cd831bd7Sths off_t size; 364cd831bd7Sths size_t blocksize; 365cd831bd7Sths 366cd831bd7Sths ret = 0; 367cd831bd7Sths bdrv_close(bs); 368cd831bd7Sths 369cd831bd7Sths do { 370cd831bd7Sths sock = unix_socket_outgoing(socket); 371cd831bd7Sths if (sock == -1) { 372cd831bd7Sths if (errno != ENOENT && errno != ECONNREFUSED) 373cd831bd7Sths goto out; 374cd831bd7Sths sleep(1); /* wait children */ 375cd831bd7Sths } 376cd831bd7Sths } while (sock == -1); 377cd831bd7Sths 378cd831bd7Sths fd = open(device, O_RDWR); 379cd831bd7Sths if (fd == -1) { 380cd831bd7Sths ret = 1; 381cd831bd7Sths goto out; 382cd831bd7Sths } 383cd831bd7Sths 384cd831bd7Sths ret = nbd_receive_negotiate(sock, &size, &blocksize); 385cd831bd7Sths if (ret == -1) { 386cd831bd7Sths ret = 1; 387cd831bd7Sths goto out; 388cd831bd7Sths } 389cd831bd7Sths 390cd831bd7Sths ret = nbd_init(fd, sock, size, blocksize); 391cd831bd7Sths if (ret == -1) { 392cd831bd7Sths ret = 1; 393cd831bd7Sths goto out; 394cd831bd7Sths } 395cd831bd7Sths 396cd831bd7Sths printf("NBD device %s is now connected to file %s\n", 397cd831bd7Sths device, argv[optind]); 398cd831bd7Sths 399cd831bd7Sths /* update partition table */ 400cd831bd7Sths 401cd831bd7Sths show_parts(device); 402cd831bd7Sths 403cd831bd7Sths nbd_client(fd, sock); 404cd831bd7Sths close(fd); 405cd831bd7Sths out: 406cd831bd7Sths kill(pid, SIGTERM); 407cd831bd7Sths unlink(socket); 408cd831bd7Sths 409cd831bd7Sths return ret; 410cd831bd7Sths } 411cd831bd7Sths /* children */ 412cd831bd7Sths } 413cd831bd7Sths 4143b05a8e9Sths sharing_fds = qemu_malloc((shared + 1) * sizeof(int)); 4153b05a8e9Sths 416cd831bd7Sths if (socket) { 4173b05a8e9Sths sharing_fds[0] = unix_socket_incoming(socket); 418cd831bd7Sths } else { 4193b05a8e9Sths sharing_fds[0] = tcp_socket_incoming(bindto, port); 420cd831bd7Sths } 421cd831bd7Sths 4223b05a8e9Sths if (sharing_fds[0] == -1) 4237a5ca864Sbellard return 1; 4243b05a8e9Sths max_fd = sharing_fds[0]; 4253b05a8e9Sths nb_fds++; 4267a5ca864Sbellard 4272f726488Sths data = qemu_memalign(512, NBD_BUFFER_SIZE); 4283b05a8e9Sths if (data == NULL) 4293b05a8e9Sths errx(ENOMEM, "Cannot allocate data buffer"); 4303b05a8e9Sths 4313b05a8e9Sths do { 4323b05a8e9Sths 4333b05a8e9Sths FD_ZERO(&fds); 4343b05a8e9Sths for (i = 0; i < nb_fds; i++) 4353b05a8e9Sths FD_SET(sharing_fds[i], &fds); 4363b05a8e9Sths 4373b05a8e9Sths ret = select(max_fd + 1, &fds, NULL, NULL, NULL); 4383b05a8e9Sths if (ret == -1) 4393b05a8e9Sths break; 4403b05a8e9Sths 4413b05a8e9Sths if (FD_ISSET(sharing_fds[0], &fds)) 4423b05a8e9Sths ret--; 4433b05a8e9Sths for (i = 1; i < nb_fds && ret; i++) { 4443b05a8e9Sths if (FD_ISSET(sharing_fds[i], &fds)) { 4453b05a8e9Sths if (nbd_trip(bs, sharing_fds[i], fd_size, dev_offset, 4463b05a8e9Sths &offset, readonly, data, NBD_BUFFER_SIZE) != 0) { 4473b05a8e9Sths close(sharing_fds[i]); 4483b05a8e9Sths nb_fds--; 4493b05a8e9Sths sharing_fds[i] = sharing_fds[nb_fds]; 4503b05a8e9Sths i--; 4513b05a8e9Sths } 4523b05a8e9Sths ret--; 4533b05a8e9Sths } 4543b05a8e9Sths } 4553b05a8e9Sths /* new connection ? */ 4563b05a8e9Sths if (FD_ISSET(sharing_fds[0], &fds)) { 4573b05a8e9Sths if (nb_fds < shared + 1) { 4583b05a8e9Sths sharing_fds[nb_fds] = accept(sharing_fds[0], 4593b05a8e9Sths (struct sockaddr *)&addr, 4603b05a8e9Sths &addr_len); 4613b05a8e9Sths if (sharing_fds[nb_fds] != -1 && 46227982661Saliguori nbd_negotiate(sharing_fds[nb_fds], fd_size) != -1) { 4633b05a8e9Sths if (sharing_fds[nb_fds] > max_fd) 4643b05a8e9Sths max_fd = sharing_fds[nb_fds]; 4653b05a8e9Sths nb_fds++; 4663b05a8e9Sths } 4673b05a8e9Sths } 4683b05a8e9Sths } 46975818250Sths } while (persistent || nb_fds > 1); 4702f726488Sths qemu_free(data); 4717a5ca864Sbellard 4723b05a8e9Sths close(sharing_fds[0]); 4737a5ca864Sbellard bdrv_close(bs); 4743b05a8e9Sths qemu_free(sharing_fds); 475cd831bd7Sths if (socket) 476cd831bd7Sths unlink(socket); 4777a5ca864Sbellard 4787a5ca864Sbellard return 0; 4797a5ca864Sbellard } 480