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 195a61cb60SStefan Weil #include "qemu-common.h" 20737e150eSPaolo Bonzini #include "block/block.h" 21*b3838a40SPeter Lieven #include "block/block_int.h" 22737e150eSPaolo Bonzini #include "block/nbd.h" 236a1751b7SAlex Bligh #include "qemu/main-loop.h" 24537b41f5SPaolo Bonzini #include "qemu/sockets.h" 25537b41f5SPaolo Bonzini #include "qemu/error-report.h" 268c116b0eSWenchao Xia #include "block/snapshot.h" 27*b3838a40SPeter Lieven #include "qapi/util.h" 287a5ca864Sbellard 297a5ca864Sbellard #include <stdarg.h> 307a5ca864Sbellard #include <stdio.h> 317a5ca864Sbellard #include <getopt.h> 327a5ca864Sbellard #include <err.h> 33cd831bd7Sths #include <sys/types.h> 347a5ca864Sbellard #include <sys/socket.h> 357a5ca864Sbellard #include <netinet/in.h> 367a5ca864Sbellard #include <netinet/tcp.h> 377a5ca864Sbellard #include <arpa/inet.h> 38cd831bd7Sths #include <signal.h> 392bff4b6fSBlue Swirl #include <libgen.h> 40a517e88bSPaolo Bonzini #include <pthread.h> 41cd831bd7Sths 42cd831bd7Sths #define SOCKET_PATH "/var/lock/qemu-nbd-%s" 4339a5235cSPaolo Bonzini #define QEMU_NBD_OPT_CACHE 1 4439a5235cSPaolo Bonzini #define QEMU_NBD_OPT_AIO 2 45ded9d2d5SPaolo Bonzini #define QEMU_NBD_OPT_DISCARD 3 46*b3838a40SPeter Lieven #define QEMU_NBD_OPT_DETECT_ZEROES 4 477a5ca864Sbellard 48af49bbbeSPaolo Bonzini static NBDExport *exp; 49b1d8e52eSblueswir1 static int verbose; 50a517e88bSPaolo Bonzini static char *srcpath; 51a517e88bSPaolo Bonzini static char *sockpath; 527860a380SPaolo Bonzini static int persistent = 0; 537860a380SPaolo Bonzini static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; 54a61c6782SPaolo Bonzini static int shared = 1; 55a61c6782SPaolo Bonzini static int nb_fds; 567a5ca864Sbellard 577a5ca864Sbellard static void usage(const char *name) 587a5ca864Sbellard { 59b033cd86SPaolo Bonzini (printf) ( 607a5ca864Sbellard "Usage: %s [OPTIONS] FILE\n" 617a5ca864Sbellard "QEMU Disk Network Block Device Server\n" 627a5ca864Sbellard "\n" 637a5ca864Sbellard " -h, --help display this help and exit\n" 647a5ca864Sbellard " -V, --version output version information and exit\n" 657a5ca864Sbellard "\n" 66b033cd86SPaolo Bonzini "Connection properties:\n" 67b033cd86SPaolo Bonzini " -p, --port=PORT port to listen on (default `%d')\n" 68b033cd86SPaolo Bonzini " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" 69b033cd86SPaolo Bonzini " -k, --socket=PATH path to the unix socket\n" 70b033cd86SPaolo Bonzini " (default '"SOCKET_PATH"')\n" 71b033cd86SPaolo Bonzini " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" 72b033cd86SPaolo Bonzini " -t, --persistent don't exit on the last connection\n" 73b033cd86SPaolo Bonzini " -v, --verbose display extra debugging information\n" 74b033cd86SPaolo Bonzini "\n" 75b033cd86SPaolo Bonzini "Exposing part of the image:\n" 76b033cd86SPaolo Bonzini " -o, --offset=OFFSET offset into the image\n" 77b033cd86SPaolo Bonzini " -P, --partition=NUM only expose partition NUM\n" 78b033cd86SPaolo Bonzini "\n" 79b033cd86SPaolo Bonzini #ifdef __linux__ 80b033cd86SPaolo Bonzini "Kernel NBD client support:\n" 81b033cd86SPaolo Bonzini " -c, --connect=DEV connect FILE to the local NBD device DEV\n" 82b033cd86SPaolo Bonzini " -d, --disconnect disconnect the specified device\n" 83b033cd86SPaolo Bonzini "\n" 84b033cd86SPaolo Bonzini #endif 85b033cd86SPaolo Bonzini "\n" 86b033cd86SPaolo Bonzini "Block device options:\n" 874323fdcfSWenchao Xia " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" 88b033cd86SPaolo Bonzini " -r, --read-only export read-only\n" 898c116b0eSWenchao Xia " -s, --snapshot use FILE as an external snapshot, create a temporary\n" 908c116b0eSWenchao Xia " file with backing_file=FILE, redirect the write to\n" 918c116b0eSWenchao Xia " the temporary one\n" 928c116b0eSWenchao Xia " -l, --load-snapshot=SNAPSHOT_PARAM\n" 938c116b0eSWenchao Xia " load an internal snapshot inside FILE and export it\n" 948c116b0eSWenchao Xia " as an read-only device, SNAPSHOT_PARAM format is\n" 958c116b0eSWenchao Xia " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 968c116b0eSWenchao Xia " '[ID_OR_NAME]'\n" 97b033cd86SPaolo Bonzini " -n, --nocache disable host cache\n" 9839a5235cSPaolo Bonzini " --cache=MODE set cache mode (none, writeback, ...)\n" 9939a5235cSPaolo Bonzini #ifdef CONFIG_LINUX_AIO 10039a5235cSPaolo Bonzini " --aio=MODE set AIO mode (native or threads)\n" 10139a5235cSPaolo Bonzini #endif 102*b3838a40SPeter Lieven " --discard=MODE set discard mode (ignore, unmap)\n" 103*b3838a40SPeter Lieven " --detect-zeroes=MODE set detect-zeroes mode (off, on, discard)\n" 104b033cd86SPaolo Bonzini "\n" 105b033cd86SPaolo Bonzini "Report bugs to <qemu-devel@nongnu.org>\n" 106c2e2872bSLaurent Vivier , name, NBD_DEFAULT_PORT, "DEVICE"); 1077a5ca864Sbellard } 1087a5ca864Sbellard 1097a5ca864Sbellard static void version(const char *name) 1107a5ca864Sbellard { 1117a5ca864Sbellard printf( 112315bc7aaSths "%s version 0.0.1\n" 1137a5ca864Sbellard "Written by Anthony Liguori.\n" 1147a5ca864Sbellard "\n" 1157a5ca864Sbellard "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" 1167a5ca864Sbellard "This is free software; see the source for copying conditions. There is NO\n" 1177a5ca864Sbellard "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" 118315bc7aaSths , name); 1197a5ca864Sbellard } 1207a5ca864Sbellard 1217a5ca864Sbellard struct partition_record 1227a5ca864Sbellard { 1237a5ca864Sbellard uint8_t bootable; 1247a5ca864Sbellard uint8_t start_head; 1257a5ca864Sbellard uint32_t start_cylinder; 1267a5ca864Sbellard uint8_t start_sector; 1277a5ca864Sbellard uint8_t system; 1287a5ca864Sbellard uint8_t end_head; 1297a5ca864Sbellard uint8_t end_cylinder; 1307a5ca864Sbellard uint8_t end_sector; 1317a5ca864Sbellard uint32_t start_sector_abs; 1327a5ca864Sbellard uint32_t nb_sectors_abs; 1337a5ca864Sbellard }; 1347a5ca864Sbellard 1357a5ca864Sbellard static void read_partition(uint8_t *p, struct partition_record *r) 1367a5ca864Sbellard { 1377a5ca864Sbellard r->bootable = p[0]; 1387a5ca864Sbellard r->start_head = p[1]; 1397a5ca864Sbellard r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); 1407a5ca864Sbellard r->start_sector = p[2] & 0x3f; 1417a5ca864Sbellard r->system = p[4]; 1427a5ca864Sbellard r->end_head = p[5]; 1437a5ca864Sbellard r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); 1447a5ca864Sbellard r->end_sector = p[6] & 0x3f; 1457a5ca864Sbellard r->start_sector_abs = p[8] | p[9] << 8 | p[10] << 16 | p[11] << 24; 1467a5ca864Sbellard r->nb_sectors_abs = p[12] | p[13] << 8 | p[14] << 16 | p[15] << 24; 1477a5ca864Sbellard } 1487a5ca864Sbellard 1497a5ca864Sbellard static int find_partition(BlockDriverState *bs, int partition, 1507a5ca864Sbellard off_t *offset, off_t *size) 1517a5ca864Sbellard { 1527a5ca864Sbellard struct partition_record mbr[4]; 1537a5ca864Sbellard uint8_t data[512]; 1547a5ca864Sbellard int i; 1557a5ca864Sbellard int ext_partnum = 4; 156cb7cf0e3SRyota Ozaki int ret; 1577a5ca864Sbellard 158cb7cf0e3SRyota Ozaki if ((ret = bdrv_read(bs, 0, data, 1)) < 0) { 159cb7cf0e3SRyota Ozaki errno = -ret; 160cb7cf0e3SRyota Ozaki err(EXIT_FAILURE, "error while reading"); 161cb7cf0e3SRyota Ozaki } 1627a5ca864Sbellard 1637a5ca864Sbellard if (data[510] != 0x55 || data[511] != 0xaa) { 164185b4338SPaolo Bonzini return -EINVAL; 1657a5ca864Sbellard } 1667a5ca864Sbellard 1677a5ca864Sbellard for (i = 0; i < 4; i++) { 1687a5ca864Sbellard read_partition(&data[446 + 16 * i], &mbr[i]); 1697a5ca864Sbellard 1707a5ca864Sbellard if (!mbr[i].nb_sectors_abs) 1717a5ca864Sbellard continue; 1727a5ca864Sbellard 1737a5ca864Sbellard if (mbr[i].system == 0xF || mbr[i].system == 0x5) { 1747a5ca864Sbellard struct partition_record ext[4]; 1757a5ca864Sbellard uint8_t data1[512]; 1767a5ca864Sbellard int j; 1777a5ca864Sbellard 178cb7cf0e3SRyota Ozaki if ((ret = bdrv_read(bs, mbr[i].start_sector_abs, data1, 1)) < 0) { 179cb7cf0e3SRyota Ozaki errno = -ret; 180cb7cf0e3SRyota Ozaki err(EXIT_FAILURE, "error while reading"); 181cb7cf0e3SRyota Ozaki } 1827a5ca864Sbellard 1837a5ca864Sbellard for (j = 0; j < 4; j++) { 1847a5ca864Sbellard read_partition(&data1[446 + 16 * j], &ext[j]); 1857a5ca864Sbellard if (!ext[j].nb_sectors_abs) 1867a5ca864Sbellard continue; 1877a5ca864Sbellard 1887a5ca864Sbellard if ((ext_partnum + j + 1) == partition) { 1897a5ca864Sbellard *offset = (uint64_t)ext[j].start_sector_abs << 9; 1907a5ca864Sbellard *size = (uint64_t)ext[j].nb_sectors_abs << 9; 1917a5ca864Sbellard return 0; 1927a5ca864Sbellard } 1937a5ca864Sbellard } 1947a5ca864Sbellard ext_partnum += 4; 1957a5ca864Sbellard } else if ((i + 1) == partition) { 1967a5ca864Sbellard *offset = (uint64_t)mbr[i].start_sector_abs << 9; 1977a5ca864Sbellard *size = (uint64_t)mbr[i].nb_sectors_abs << 9; 1987a5ca864Sbellard return 0; 1997a5ca864Sbellard } 2007a5ca864Sbellard } 2017a5ca864Sbellard 202185b4338SPaolo Bonzini return -ENOENT; 2037a5ca864Sbellard } 2047a5ca864Sbellard 205bb345110SPaolo Bonzini static void termsig_handler(int signum) 206bb345110SPaolo Bonzini { 2077860a380SPaolo Bonzini state = TERMINATE; 208a61c6782SPaolo Bonzini qemu_notify_event(); 209bb345110SPaolo Bonzini } 210bb345110SPaolo Bonzini 211537b41f5SPaolo Bonzini static void combine_addr(char *buf, size_t len, const char* address, 212537b41f5SPaolo Bonzini uint16_t port) 213537b41f5SPaolo Bonzini { 214537b41f5SPaolo Bonzini /* If the address-part contains a colon, it's an IPv6 IP so needs [] */ 215537b41f5SPaolo Bonzini if (strstr(address, ":")) { 216537b41f5SPaolo Bonzini snprintf(buf, len, "[%s]:%u", address, port); 217537b41f5SPaolo Bonzini } else { 218537b41f5SPaolo Bonzini snprintf(buf, len, "%s:%u", address, port); 219537b41f5SPaolo Bonzini } 220537b41f5SPaolo Bonzini } 221537b41f5SPaolo Bonzini 222537b41f5SPaolo Bonzini static int tcp_socket_incoming(const char *address, uint16_t port) 223537b41f5SPaolo Bonzini { 224537b41f5SPaolo Bonzini char address_and_port[128]; 225537b41f5SPaolo Bonzini Error *local_err = NULL; 226537b41f5SPaolo Bonzini 227537b41f5SPaolo Bonzini combine_addr(address_and_port, 128, address, port); 228537b41f5SPaolo Bonzini int fd = inet_listen(address_and_port, NULL, 0, SOCK_STREAM, 0, &local_err); 229537b41f5SPaolo Bonzini 230537b41f5SPaolo Bonzini if (local_err != NULL) { 2313775ec6fSMarkus Armbruster error_report("%s", error_get_pretty(local_err)); 232537b41f5SPaolo Bonzini error_free(local_err); 233537b41f5SPaolo Bonzini } 234537b41f5SPaolo Bonzini return fd; 235537b41f5SPaolo Bonzini } 236537b41f5SPaolo Bonzini 237537b41f5SPaolo Bonzini static int unix_socket_incoming(const char *path) 238537b41f5SPaolo Bonzini { 239537b41f5SPaolo Bonzini Error *local_err = NULL; 240537b41f5SPaolo Bonzini int fd = unix_listen(path, NULL, 0, &local_err); 241537b41f5SPaolo Bonzini 242537b41f5SPaolo Bonzini if (local_err != NULL) { 2433775ec6fSMarkus Armbruster error_report("%s", error_get_pretty(local_err)); 244537b41f5SPaolo Bonzini error_free(local_err); 245537b41f5SPaolo Bonzini } 246537b41f5SPaolo Bonzini return fd; 247537b41f5SPaolo Bonzini } 248537b41f5SPaolo Bonzini 249537b41f5SPaolo Bonzini static int unix_socket_outgoing(const char *path) 250537b41f5SPaolo Bonzini { 251537b41f5SPaolo Bonzini Error *local_err = NULL; 252537b41f5SPaolo Bonzini int fd = unix_connect(path, &local_err); 253537b41f5SPaolo Bonzini 254537b41f5SPaolo Bonzini if (local_err != NULL) { 2553775ec6fSMarkus Armbruster error_report("%s", error_get_pretty(local_err)); 256537b41f5SPaolo Bonzini error_free(local_err); 257537b41f5SPaolo Bonzini } 258537b41f5SPaolo Bonzini return fd; 259537b41f5SPaolo Bonzini } 260537b41f5SPaolo Bonzini 261a517e88bSPaolo Bonzini static void *show_parts(void *arg) 262cd831bd7Sths { 263a6ac2313SPaolo Bonzini char *device = arg; 264cd831bd7Sths int nbd; 265cd831bd7Sths 266cd831bd7Sths /* linux just needs an open() to trigger 267cd831bd7Sths * the partition table update 268cd831bd7Sths * but remember to load the module with max_part != 0 : 269cd831bd7Sths * modprobe nbd max_part=63 270cd831bd7Sths */ 271cd831bd7Sths nbd = open(device, O_RDWR); 272fc19f8a0SPaolo Bonzini if (nbd >= 0) { 273cd831bd7Sths close(nbd); 274cd831bd7Sths } 275a517e88bSPaolo Bonzini return NULL; 276a517e88bSPaolo Bonzini } 277a517e88bSPaolo Bonzini 278a517e88bSPaolo Bonzini static void *nbd_client_thread(void *arg) 279a517e88bSPaolo Bonzini { 280a6ac2313SPaolo Bonzini char *device = arg; 281a517e88bSPaolo Bonzini off_t size; 282a517e88bSPaolo Bonzini size_t blocksize; 283a517e88bSPaolo Bonzini uint32_t nbdflags; 284a6ac2313SPaolo Bonzini int fd, sock; 285a517e88bSPaolo Bonzini int ret; 286a517e88bSPaolo Bonzini pthread_t show_parts_thread; 287a517e88bSPaolo Bonzini 288a517e88bSPaolo Bonzini sock = unix_socket_outgoing(sockpath); 289fc19f8a0SPaolo Bonzini if (sock < 0) { 290a517e88bSPaolo Bonzini goto out; 291a517e88bSPaolo Bonzini } 292a517e88bSPaolo Bonzini 293a517e88bSPaolo Bonzini ret = nbd_receive_negotiate(sock, NULL, &nbdflags, 294a517e88bSPaolo Bonzini &size, &blocksize); 295fc19f8a0SPaolo Bonzini if (ret < 0) { 2960c544d73SPaolo Bonzini goto out_socket; 297a517e88bSPaolo Bonzini } 298a517e88bSPaolo Bonzini 299a6ac2313SPaolo Bonzini fd = open(device, O_RDWR); 300fc19f8a0SPaolo Bonzini if (fd < 0) { 301a6ac2313SPaolo Bonzini /* Linux-only, we can use %m in printf. */ 3025672ee54SHani Benhabiles fprintf(stderr, "Failed to open %s: %m\n", device); 3030c544d73SPaolo Bonzini goto out_socket; 304a6ac2313SPaolo Bonzini } 305a6ac2313SPaolo Bonzini 306a517e88bSPaolo Bonzini ret = nbd_init(fd, sock, nbdflags, size, blocksize); 307fc19f8a0SPaolo Bonzini if (ret < 0) { 3080c544d73SPaolo Bonzini goto out_fd; 309a517e88bSPaolo Bonzini } 310a517e88bSPaolo Bonzini 311a517e88bSPaolo Bonzini /* update partition table */ 312a6ac2313SPaolo Bonzini pthread_create(&show_parts_thread, NULL, show_parts, device); 313a517e88bSPaolo Bonzini 314c1f8fdc3SPaolo Bonzini if (verbose) { 315a517e88bSPaolo Bonzini fprintf(stderr, "NBD device %s is now connected to %s\n", 316a517e88bSPaolo Bonzini device, srcpath); 317c1f8fdc3SPaolo Bonzini } else { 318c1f8fdc3SPaolo Bonzini /* Close stderr so that the qemu-nbd process exits. */ 319c1f8fdc3SPaolo Bonzini dup2(STDOUT_FILENO, STDERR_FILENO); 320c1f8fdc3SPaolo Bonzini } 321a517e88bSPaolo Bonzini 322a517e88bSPaolo Bonzini ret = nbd_client(fd); 323a517e88bSPaolo Bonzini if (ret) { 3240c544d73SPaolo Bonzini goto out_fd; 325a517e88bSPaolo Bonzini } 326a517e88bSPaolo Bonzini close(fd); 327a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 328a517e88bSPaolo Bonzini return (void *) EXIT_SUCCESS; 329a517e88bSPaolo Bonzini 3300c544d73SPaolo Bonzini out_fd: 3310c544d73SPaolo Bonzini close(fd); 3320c544d73SPaolo Bonzini out_socket: 3330c544d73SPaolo Bonzini closesocket(sock); 334a517e88bSPaolo Bonzini out: 335a517e88bSPaolo Bonzini kill(getpid(), SIGTERM); 336a517e88bSPaolo Bonzini return (void *) EXIT_FAILURE; 337cd831bd7Sths } 338cd831bd7Sths 339a61c6782SPaolo Bonzini static int nbd_can_accept(void *opaque) 340a61c6782SPaolo Bonzini { 341a61c6782SPaolo Bonzini return nb_fds < shared; 342a61c6782SPaolo Bonzini } 343a61c6782SPaolo Bonzini 3447860a380SPaolo Bonzini static void nbd_export_closed(NBDExport *exp) 3457860a380SPaolo Bonzini { 3467860a380SPaolo Bonzini assert(state == TERMINATING); 3477860a380SPaolo Bonzini state = TERMINATED; 3487860a380SPaolo Bonzini } 3497860a380SPaolo Bonzini 3501743b515SPaolo Bonzini static void nbd_client_closed(NBDClient *client) 351a61c6782SPaolo Bonzini { 352a61c6782SPaolo Bonzini nb_fds--; 3537860a380SPaolo Bonzini if (nb_fds == 0 && !persistent && state == RUNNING) { 3547860a380SPaolo Bonzini state = TERMINATE; 3557860a380SPaolo Bonzini } 3561743b515SPaolo Bonzini qemu_notify_event(); 3577860a380SPaolo Bonzini nbd_client_put(client); 358a61c6782SPaolo Bonzini } 359a61c6782SPaolo Bonzini 360a61c6782SPaolo Bonzini static void nbd_accept(void *opaque) 361a61c6782SPaolo Bonzini { 362a61c6782SPaolo Bonzini int server_fd = (uintptr_t) opaque; 363a61c6782SPaolo Bonzini struct sockaddr_in addr; 364a61c6782SPaolo Bonzini socklen_t addr_len = sizeof(addr); 365a61c6782SPaolo Bonzini 366a61c6782SPaolo Bonzini int fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len); 3670c544d73SPaolo Bonzini if (fd < 0) { 3680c544d73SPaolo Bonzini perror("accept"); 3690c544d73SPaolo Bonzini return; 3700c544d73SPaolo Bonzini } 3710c544d73SPaolo Bonzini 3727860a380SPaolo Bonzini if (state >= TERMINATE) { 3737860a380SPaolo Bonzini close(fd); 3747860a380SPaolo Bonzini return; 3757860a380SPaolo Bonzini } 3767860a380SPaolo Bonzini 37736af5994SHani Benhabiles if (nbd_client_new(exp, fd, nbd_client_closed)) { 378a61c6782SPaolo Bonzini nb_fds++; 37936af5994SHani Benhabiles } else { 38027e5eae4SHani Benhabiles shutdown(fd, 2); 38136af5994SHani Benhabiles close(fd); 382a61c6782SPaolo Bonzini } 383a61c6782SPaolo Bonzini } 384a61c6782SPaolo Bonzini 3857a5ca864Sbellard int main(int argc, char **argv) 3867a5ca864Sbellard { 3877a5ca864Sbellard BlockDriverState *bs; 388e6b63677SDaniel P. Berrange BlockDriver *drv; 3897a5ca864Sbellard off_t dev_offset = 0; 390b90fb4b8SPaolo Bonzini uint32_t nbdflags = 0; 391cd831bd7Sths bool disconnect = false; 3927a5ca864Sbellard const char *bindto = "0.0.0.0"; 393a6ac2313SPaolo Bonzini char *device = NULL; 394c2e2872bSLaurent Vivier int port = NBD_DEFAULT_PORT; 3957a5ca864Sbellard off_t fd_size; 3968c116b0eSWenchao Xia QemuOpts *sn_opts = NULL; 3978c116b0eSWenchao Xia const char *sn_id_or_name = NULL; 3988c116b0eSWenchao Xia const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:"; 3997a5ca864Sbellard struct option lopt[] = { 400660f11beSBlue Swirl { "help", 0, NULL, 'h' }, 401660f11beSBlue Swirl { "version", 0, NULL, 'V' }, 402660f11beSBlue Swirl { "bind", 1, NULL, 'b' }, 403660f11beSBlue Swirl { "port", 1, NULL, 'p' }, 404660f11beSBlue Swirl { "socket", 1, NULL, 'k' }, 405660f11beSBlue Swirl { "offset", 1, NULL, 'o' }, 406660f11beSBlue Swirl { "read-only", 0, NULL, 'r' }, 407660f11beSBlue Swirl { "partition", 1, NULL, 'P' }, 408660f11beSBlue Swirl { "connect", 1, NULL, 'c' }, 409660f11beSBlue Swirl { "disconnect", 0, NULL, 'd' }, 410660f11beSBlue Swirl { "snapshot", 0, NULL, 's' }, 4118c116b0eSWenchao Xia { "load-snapshot", 1, NULL, 'l' }, 412660f11beSBlue Swirl { "nocache", 0, NULL, 'n' }, 41339a5235cSPaolo Bonzini { "cache", 1, NULL, QEMU_NBD_OPT_CACHE }, 41439a5235cSPaolo Bonzini #ifdef CONFIG_LINUX_AIO 41539a5235cSPaolo Bonzini { "aio", 1, NULL, QEMU_NBD_OPT_AIO }, 41639a5235cSPaolo Bonzini #endif 417ded9d2d5SPaolo Bonzini { "discard", 1, NULL, QEMU_NBD_OPT_DISCARD }, 418*b3838a40SPeter Lieven { "detect-zeroes", 1, NULL, QEMU_NBD_OPT_DETECT_ZEROES }, 419660f11beSBlue Swirl { "shared", 1, NULL, 'e' }, 420e6b63677SDaniel P. Berrange { "format", 1, NULL, 'f' }, 421660f11beSBlue Swirl { "persistent", 0, NULL, 't' }, 422660f11beSBlue Swirl { "verbose", 0, NULL, 'v' }, 423660f11beSBlue Swirl { NULL, 0, NULL, 0 } 4247a5ca864Sbellard }; 4257a5ca864Sbellard int ch; 4267a5ca864Sbellard int opt_ind = 0; 4277a5ca864Sbellard int li; 4287a5ca864Sbellard char *end; 429f5edb014SNaphtali Sprei int flags = BDRV_O_RDWR; 4307a5ca864Sbellard int partition = -1; 431cd831bd7Sths int ret; 4323b05a8e9Sths int fd; 43339a5235cSPaolo Bonzini bool seen_cache = false; 434ded9d2d5SPaolo Bonzini bool seen_discard = false; 43539a5235cSPaolo Bonzini #ifdef CONFIG_LINUX_AIO 43639a5235cSPaolo Bonzini bool seen_aio = false; 43739a5235cSPaolo Bonzini #endif 438a517e88bSPaolo Bonzini pthread_t client_thread; 439e6b63677SDaniel P. Berrange const char *fmt = NULL; 44034b5d2c6SMax Reitz Error *local_err = NULL; 441*b3838a40SPeter Lieven BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; 4427a5ca864Sbellard 443a517e88bSPaolo Bonzini /* The client thread uses SIGTERM to interrupt the server. A signal 444a517e88bSPaolo Bonzini * handler ensures that "qemu-nbd -v -c" exits with a nice status code. 445a517e88bSPaolo Bonzini */ 446bb345110SPaolo Bonzini struct sigaction sa_sigterm; 447bb345110SPaolo Bonzini memset(&sa_sigterm, 0, sizeof(sa_sigterm)); 448bb345110SPaolo Bonzini sa_sigterm.sa_handler = termsig_handler; 449bb345110SPaolo Bonzini sigaction(SIGTERM, &sa_sigterm, NULL); 45010f5bff6SFam Zheng qemu_init_exec_dir(argv[0]); 451bb345110SPaolo Bonzini 4527a5ca864Sbellard while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { 4537a5ca864Sbellard switch (ch) { 4547a5ca864Sbellard case 's': 4552f726488Sths flags |= BDRV_O_SNAPSHOT; 4562f726488Sths break; 4572f726488Sths case 'n': 45839a5235cSPaolo Bonzini optarg = (char *) "none"; 45939a5235cSPaolo Bonzini /* fallthrough */ 46039a5235cSPaolo Bonzini case QEMU_NBD_OPT_CACHE: 46139a5235cSPaolo Bonzini if (seen_cache) { 46239a5235cSPaolo Bonzini errx(EXIT_FAILURE, "-n and --cache can only be specified once"); 46339a5235cSPaolo Bonzini } 46439a5235cSPaolo Bonzini seen_cache = true; 46539a5235cSPaolo Bonzini if (bdrv_parse_cache_flags(optarg, &flags) == -1) { 46639a5235cSPaolo Bonzini errx(EXIT_FAILURE, "Invalid cache mode `%s'", optarg); 46739a5235cSPaolo Bonzini } 4687a5ca864Sbellard break; 46939a5235cSPaolo Bonzini #ifdef CONFIG_LINUX_AIO 47039a5235cSPaolo Bonzini case QEMU_NBD_OPT_AIO: 47139a5235cSPaolo Bonzini if (seen_aio) { 47239a5235cSPaolo Bonzini errx(EXIT_FAILURE, "--aio can only be specified once"); 47339a5235cSPaolo Bonzini } 47439a5235cSPaolo Bonzini seen_aio = true; 47539a5235cSPaolo Bonzini if (!strcmp(optarg, "native")) { 47639a5235cSPaolo Bonzini flags |= BDRV_O_NATIVE_AIO; 47739a5235cSPaolo Bonzini } else if (!strcmp(optarg, "threads")) { 47839a5235cSPaolo Bonzini /* this is the default */ 47939a5235cSPaolo Bonzini } else { 48039a5235cSPaolo Bonzini errx(EXIT_FAILURE, "invalid aio mode `%s'", optarg); 48139a5235cSPaolo Bonzini } 48239a5235cSPaolo Bonzini break; 48339a5235cSPaolo Bonzini #endif 484ded9d2d5SPaolo Bonzini case QEMU_NBD_OPT_DISCARD: 485ded9d2d5SPaolo Bonzini if (seen_discard) { 486ded9d2d5SPaolo Bonzini errx(EXIT_FAILURE, "--discard can only be specified once"); 487ded9d2d5SPaolo Bonzini } 488ded9d2d5SPaolo Bonzini seen_discard = true; 489ded9d2d5SPaolo Bonzini if (bdrv_parse_discard_flags(optarg, &flags) == -1) { 490ded9d2d5SPaolo Bonzini errx(EXIT_FAILURE, "Invalid discard mode `%s'", optarg); 491ded9d2d5SPaolo Bonzini } 492ded9d2d5SPaolo Bonzini break; 493*b3838a40SPeter Lieven case QEMU_NBD_OPT_DETECT_ZEROES: 494*b3838a40SPeter Lieven detect_zeroes = 495*b3838a40SPeter Lieven qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, 496*b3838a40SPeter Lieven optarg, 497*b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX, 498*b3838a40SPeter Lieven BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, 499*b3838a40SPeter Lieven &local_err); 500*b3838a40SPeter Lieven if (local_err) { 501*b3838a40SPeter Lieven errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s", 502*b3838a40SPeter Lieven error_get_pretty(local_err)); 503*b3838a40SPeter Lieven } 504*b3838a40SPeter Lieven if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && 505*b3838a40SPeter Lieven !(flags & BDRV_O_UNMAP)) { 506*b3838a40SPeter Lieven errx(EXIT_FAILURE, "setting detect-zeroes to unmap is not allowed " 507*b3838a40SPeter Lieven "without setting discard operation to unmap"); 508*b3838a40SPeter Lieven } 509*b3838a40SPeter Lieven break; 5107a5ca864Sbellard case 'b': 5117a5ca864Sbellard bindto = optarg; 5127a5ca864Sbellard break; 5137a5ca864Sbellard case 'p': 5147a5ca864Sbellard li = strtol(optarg, &end, 0); 5157a5ca864Sbellard if (*end) { 516b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid port `%s'", optarg); 5177a5ca864Sbellard } 5187a5ca864Sbellard if (li < 1 || li > 65535) { 519b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Port out of range `%s'", optarg); 5207a5ca864Sbellard } 5217a5ca864Sbellard port = (uint16_t)li; 5227a5ca864Sbellard break; 5237a5ca864Sbellard case 'o': 5247a5ca864Sbellard dev_offset = strtoll (optarg, &end, 0); 5257a5ca864Sbellard if (*end) { 526b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid offset `%s'", optarg); 5277a5ca864Sbellard } 5287a5ca864Sbellard if (dev_offset < 0) { 529b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Offset must be positive `%s'", optarg); 5307a5ca864Sbellard } 5317a5ca864Sbellard break; 5328c116b0eSWenchao Xia case 'l': 5338c116b0eSWenchao Xia if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 5348c116b0eSWenchao Xia sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0); 5358c116b0eSWenchao Xia if (!sn_opts) { 5368c116b0eSWenchao Xia errx(EXIT_FAILURE, "Failed in parsing snapshot param `%s'", 5378c116b0eSWenchao Xia optarg); 5388c116b0eSWenchao Xia } 5398c116b0eSWenchao Xia } else { 5408c116b0eSWenchao Xia sn_id_or_name = optarg; 5418c116b0eSWenchao Xia } 5428c116b0eSWenchao Xia /* fall through */ 5437a5ca864Sbellard case 'r': 544b90fb4b8SPaolo Bonzini nbdflags |= NBD_FLAG_READ_ONLY; 54507108b29SNaphtali Sprei flags &= ~BDRV_O_RDWR; 5467a5ca864Sbellard break; 5477a5ca864Sbellard case 'P': 5487a5ca864Sbellard partition = strtol(optarg, &end, 0); 5497a5ca864Sbellard if (*end) 550b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid partition `%s'", optarg); 5517a5ca864Sbellard if (partition < 1 || partition > 8) 552b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid partition %d", partition); 5537a5ca864Sbellard break; 554cd831bd7Sths case 'k': 555b32f6c28SPaolo Bonzini sockpath = optarg; 556b32f6c28SPaolo Bonzini if (sockpath[0] != '/') 557b6353beaSRyota Ozaki errx(EXIT_FAILURE, "socket path must be absolute\n"); 558cd831bd7Sths break; 559cd831bd7Sths case 'd': 560cd831bd7Sths disconnect = true; 561cd831bd7Sths break; 562cd831bd7Sths case 'c': 563cd831bd7Sths device = optarg; 564cd831bd7Sths break; 5653b05a8e9Sths case 'e': 5663b05a8e9Sths shared = strtol(optarg, &end, 0); 5673b05a8e9Sths if (*end) { 568b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid shared device number '%s'", optarg); 5693b05a8e9Sths } 5703b05a8e9Sths if (shared < 1) { 571b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Shared device number must be greater than 0\n"); 5723b05a8e9Sths } 5733b05a8e9Sths break; 574e6b63677SDaniel P. Berrange case 'f': 575e6b63677SDaniel P. Berrange fmt = optarg; 576e6b63677SDaniel P. Berrange break; 57775818250Sths case 't': 57875818250Sths persistent = 1; 57975818250Sths break; 5807a5ca864Sbellard case 'v': 5817a5ca864Sbellard verbose = 1; 5827a5ca864Sbellard break; 5837a5ca864Sbellard case 'V': 5847a5ca864Sbellard version(argv[0]); 5857a5ca864Sbellard exit(0); 5867a5ca864Sbellard break; 5877a5ca864Sbellard case 'h': 5887a5ca864Sbellard usage(argv[0]); 5897a5ca864Sbellard exit(0); 5907a5ca864Sbellard break; 5917a5ca864Sbellard case '?': 592b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Try `%s --help' for more information.", 5937a5ca864Sbellard argv[0]); 5947a5ca864Sbellard } 5957a5ca864Sbellard } 5967a5ca864Sbellard 5977a5ca864Sbellard if ((argc - optind) != 1) { 598b6353beaSRyota Ozaki errx(EXIT_FAILURE, "Invalid number of argument.\n" 5997a5ca864Sbellard "Try `%s --help' for more information.", 6007a5ca864Sbellard argv[0]); 6017a5ca864Sbellard } 6027a5ca864Sbellard 603cd831bd7Sths if (disconnect) { 604cd831bd7Sths fd = open(argv[optind], O_RDWR); 605fc19f8a0SPaolo Bonzini if (fd < 0) { 606cb7cf0e3SRyota Ozaki err(EXIT_FAILURE, "Cannot open %s", argv[optind]); 607fc19f8a0SPaolo Bonzini } 608cd831bd7Sths nbd_disconnect(fd); 609cd831bd7Sths 610cd831bd7Sths close(fd); 611cd831bd7Sths 612cd831bd7Sths printf("%s disconnected\n", argv[optind]); 613cd831bd7Sths 614cd831bd7Sths return 0; 615cd831bd7Sths } 616cd831bd7Sths 617c1f8fdc3SPaolo Bonzini if (device && !verbose) { 618c1f8fdc3SPaolo Bonzini int stderr_fd[2]; 619c1f8fdc3SPaolo Bonzini pid_t pid; 620c1f8fdc3SPaolo Bonzini int ret; 621c1f8fdc3SPaolo Bonzini 622fc19f8a0SPaolo Bonzini if (qemu_pipe(stderr_fd) < 0) { 623c1f8fdc3SPaolo Bonzini err(EXIT_FAILURE, "Error setting up communication pipe"); 624c1f8fdc3SPaolo Bonzini } 625c1f8fdc3SPaolo Bonzini 626c1f8fdc3SPaolo Bonzini /* Now daemonize, but keep a communication channel open to 627c1f8fdc3SPaolo Bonzini * print errors and exit with the proper status code. 628c1f8fdc3SPaolo Bonzini */ 629c1f8fdc3SPaolo Bonzini pid = fork(); 630c1f8fdc3SPaolo Bonzini if (pid == 0) { 631c1f8fdc3SPaolo Bonzini close(stderr_fd[0]); 6329faf31b6SMichael Tokarev ret = qemu_daemon(1, 0); 633c1f8fdc3SPaolo Bonzini 634c1f8fdc3SPaolo Bonzini /* Temporarily redirect stderr to the parent's pipe... */ 635c1f8fdc3SPaolo Bonzini dup2(stderr_fd[1], STDERR_FILENO); 636fc19f8a0SPaolo Bonzini if (ret < 0) { 637c1f8fdc3SPaolo Bonzini err(EXIT_FAILURE, "Failed to daemonize"); 638c1f8fdc3SPaolo Bonzini } 639c1f8fdc3SPaolo Bonzini 640c1f8fdc3SPaolo Bonzini /* ... close the descriptor we inherited and go on. */ 641c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 642c1f8fdc3SPaolo Bonzini } else { 643c1f8fdc3SPaolo Bonzini bool errors = false; 644c1f8fdc3SPaolo Bonzini char *buf; 645c1f8fdc3SPaolo Bonzini 646c1f8fdc3SPaolo Bonzini /* In the parent. Print error messages from the child until 647c1f8fdc3SPaolo Bonzini * it closes the pipe. 648c1f8fdc3SPaolo Bonzini */ 649c1f8fdc3SPaolo Bonzini close(stderr_fd[1]); 650c1f8fdc3SPaolo Bonzini buf = g_malloc(1024); 651c1f8fdc3SPaolo Bonzini while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { 652c1f8fdc3SPaolo Bonzini errors = true; 653c1f8fdc3SPaolo Bonzini ret = qemu_write_full(STDERR_FILENO, buf, ret); 654fc19f8a0SPaolo Bonzini if (ret < 0) { 655c1f8fdc3SPaolo Bonzini exit(EXIT_FAILURE); 656c1f8fdc3SPaolo Bonzini } 657c1f8fdc3SPaolo Bonzini } 658fc19f8a0SPaolo Bonzini if (ret < 0) { 659c1f8fdc3SPaolo Bonzini err(EXIT_FAILURE, "Cannot read from daemon"); 660c1f8fdc3SPaolo Bonzini } 661c1f8fdc3SPaolo Bonzini 662c1f8fdc3SPaolo Bonzini /* Usually the daemon should not print any message. 663c1f8fdc3SPaolo Bonzini * Exit with zero status in that case. 664c1f8fdc3SPaolo Bonzini */ 665c1f8fdc3SPaolo Bonzini exit(errors); 666c1f8fdc3SPaolo Bonzini } 667c1f8fdc3SPaolo Bonzini } 668c1f8fdc3SPaolo Bonzini 669a6ac2313SPaolo Bonzini if (device != NULL && sockpath == NULL) { 670b32f6c28SPaolo Bonzini sockpath = g_malloc(128); 671b32f6c28SPaolo Bonzini snprintf(sockpath, 128, SOCKET_PATH, basename(device)); 672cd831bd7Sths } 673cd831bd7Sths 6747e7f4a0eSPaolo Bonzini qemu_init_main_loop(); 675802ddc37SPaolo Bonzini bdrv_init(); 676802ddc37SPaolo Bonzini atexit(bdrv_close_all); 677802ddc37SPaolo Bonzini 678e6b63677SDaniel P. Berrange if (fmt) { 679e6b63677SDaniel P. Berrange drv = bdrv_find_format(fmt); 680e6b63677SDaniel P. Berrange if (!drv) { 681e6b63677SDaniel P. Berrange errx(EXIT_FAILURE, "Unknown file format '%s'", fmt); 682e6b63677SDaniel P. Berrange } 683e6b63677SDaniel P. Berrange } else { 684e6b63677SDaniel P. Berrange drv = NULL; 685e6b63677SDaniel P. Berrange } 686e6b63677SDaniel P. Berrange 68798522f63SKevin Wolf bs = bdrv_new("hda", &error_abort); 68898522f63SKevin Wolf 689802ddc37SPaolo Bonzini srcpath = argv[optind]; 690ddf5636dSMax Reitz ret = bdrv_open(&bs, srcpath, NULL, NULL, flags, drv, &local_err); 691e6b63677SDaniel P. Berrange if (ret < 0) { 692802ddc37SPaolo Bonzini errno = -ret; 69334b5d2c6SMax Reitz err(EXIT_FAILURE, "Failed to bdrv_open '%s': %s", argv[optind], 69434b5d2c6SMax Reitz error_get_pretty(local_err)); 695802ddc37SPaolo Bonzini } 696802ddc37SPaolo Bonzini 6978c116b0eSWenchao Xia if (sn_opts) { 6988c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp(bs, 6998c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 7008c116b0eSWenchao Xia qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 7018c116b0eSWenchao Xia &local_err); 7028c116b0eSWenchao Xia } else if (sn_id_or_name) { 7038c116b0eSWenchao Xia ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, 7048c116b0eSWenchao Xia &local_err); 7058c116b0eSWenchao Xia } 7068c116b0eSWenchao Xia if (ret < 0) { 7078c116b0eSWenchao Xia errno = -ret; 7088c116b0eSWenchao Xia err(EXIT_FAILURE, 7098c116b0eSWenchao Xia "Failed to load snapshot: %s", 7108c116b0eSWenchao Xia error_get_pretty(local_err)); 7118c116b0eSWenchao Xia } 7128c116b0eSWenchao Xia 713*b3838a40SPeter Lieven bs->detect_zeroes = detect_zeroes; 71438ceff04SPaolo Bonzini fd_size = bdrv_getlength(bs); 715802ddc37SPaolo Bonzini 716185b4338SPaolo Bonzini if (partition != -1) { 717185b4338SPaolo Bonzini ret = find_partition(bs, partition, &dev_offset, &fd_size); 718185b4338SPaolo Bonzini if (ret < 0) { 719185b4338SPaolo Bonzini errno = -ret; 720802ddc37SPaolo Bonzini err(EXIT_FAILURE, "Could not find partition %d", partition); 721802ddc37SPaolo Bonzini } 722185b4338SPaolo Bonzini } 723802ddc37SPaolo Bonzini 7247860a380SPaolo Bonzini exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed); 7253b05a8e9Sths 726b32f6c28SPaolo Bonzini if (sockpath) { 727a61c6782SPaolo Bonzini fd = unix_socket_incoming(sockpath); 728cd831bd7Sths } else { 729a61c6782SPaolo Bonzini fd = tcp_socket_incoming(bindto, port); 730cd831bd7Sths } 731cd831bd7Sths 732fc19f8a0SPaolo Bonzini if (fd < 0) { 7337a5ca864Sbellard return 1; 734a61c6782SPaolo Bonzini } 735f1ef5555SPaolo Bonzini 736f1ef5555SPaolo Bonzini if (device) { 737f1ef5555SPaolo Bonzini int ret; 738f1ef5555SPaolo Bonzini 739a6ac2313SPaolo Bonzini ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); 740f1ef5555SPaolo Bonzini if (ret != 0) { 741f1ef5555SPaolo Bonzini errx(EXIT_FAILURE, "Failed to create client thread: %s", 742f1ef5555SPaolo Bonzini strerror(ret)); 743f1ef5555SPaolo Bonzini } 744f1ef5555SPaolo Bonzini } else { 745f1ef5555SPaolo Bonzini /* Shut up GCC warnings. */ 746f1ef5555SPaolo Bonzini memset(&client_thread, 0, sizeof(client_thread)); 747f1ef5555SPaolo Bonzini } 748f1ef5555SPaolo Bonzini 749a61c6782SPaolo Bonzini qemu_set_fd_handler2(fd, nbd_can_accept, nbd_accept, NULL, 750a61c6782SPaolo Bonzini (void *)(uintptr_t)fd); 7517a5ca864Sbellard 7529faf31b6SMichael Tokarev /* now when the initialization is (almost) complete, chdir("/") 7539faf31b6SMichael Tokarev * to free any busy filesystems */ 7549faf31b6SMichael Tokarev if (chdir("/") < 0) { 7559faf31b6SMichael Tokarev err(EXIT_FAILURE, "Could not chdir to root directory"); 7569faf31b6SMichael Tokarev } 7579faf31b6SMichael Tokarev 7587860a380SPaolo Bonzini state = RUNNING; 7593b05a8e9Sths do { 760a61c6782SPaolo Bonzini main_loop_wait(false); 7617860a380SPaolo Bonzini if (state == TERMINATE) { 7627860a380SPaolo Bonzini state = TERMINATING; 763af49bbbeSPaolo Bonzini nbd_export_close(exp); 7642c8d9f06SPaolo Bonzini nbd_export_put(exp); 7657860a380SPaolo Bonzini exp = NULL; 7667860a380SPaolo Bonzini } 7677860a380SPaolo Bonzini } while (state != TERMINATED); 7682c8d9f06SPaolo Bonzini 7697860a380SPaolo Bonzini bdrv_close(bs); 770b32f6c28SPaolo Bonzini if (sockpath) { 771b32f6c28SPaolo Bonzini unlink(sockpath); 772b32f6c28SPaolo Bonzini } 7737a5ca864Sbellard 7748c116b0eSWenchao Xia if (sn_opts) { 7758c116b0eSWenchao Xia qemu_opts_del(sn_opts); 7768c116b0eSWenchao Xia } 7778c116b0eSWenchao Xia 778a517e88bSPaolo Bonzini if (device) { 779a517e88bSPaolo Bonzini void *ret; 780a517e88bSPaolo Bonzini pthread_join(client_thread, &ret); 781a517e88bSPaolo Bonzini exit(ret != NULL); 782a517e88bSPaolo Bonzini } else { 783a517e88bSPaolo Bonzini exit(EXIT_SUCCESS); 784a517e88bSPaolo Bonzini } 7857a5ca864Sbellard } 786