"Usage: %s [OPTIONS] FILE\n"
"QEMU Disk Network Block Device Server\n"
"\n"
-" -p, --port=PORT port to listen on (default `1024')\n"
+" -p, --port=PORT port to listen on (default `%d')\n"
" -o, --offset=OFFSET offset into the image\n"
" -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n"
" -k, --socket=PATH path to the unix socket\n"
" -V, --version output version information and exit\n"
"\n"
"Report bugs to <anthony@codemonkey.ws>\n"
- , name, "DEVICE");
+ , name, NBD_DEFAULT_PORT, "DEVICE");
}
static void version(const char *name)
uint8_t data[512];
int i;
int ext_partnum = 4;
+ int ret;
- if (bdrv_read(bs, 0, data, 1))
- errx(EINVAL, "error while reading");
+ if ((ret = bdrv_read(bs, 0, data, 1)) < 0) {
+ errno = -ret;
+ err(EXIT_FAILURE, "error while reading");
+ }
if (data[510] != 0x55 || data[511] != 0xaa) {
errno = -EINVAL;
uint8_t data1[512];
int j;
- if (bdrv_read(bs, mbr[i].start_sector_abs, data1, 1))
- errx(EINVAL, "error while reading");
+ if ((ret = bdrv_read(bs, mbr[i].start_sector_abs, data1, 1)) < 0) {
+ errno = -ret;
+ err(EXIT_FAILURE, "error while reading");
+ }
for (j = 0; j < 4; j++) {
read_partition(&data1[446 + 16 * j], &ext[j]);
bool readonly = false;
bool disconnect = false;
const char *bindto = "0.0.0.0";
- int port = 1024;
+ int port = NBD_DEFAULT_PORT;
struct sockaddr_in addr;
socklen_t addr_len = sizeof(addr);
off_t fd_size;
int opt_ind = 0;
int li;
char *end;
- int flags = 0;
+ int flags = BDRV_O_RDWR;
int partition = -1;
int ret;
int shared = 1;
int nb_fds = 0;
int max_fd;
int persistent = 0;
+ uint32_t nbdflags;
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
switch (ch) {
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
- flags |= BDRV_O_NOCACHE;
+ flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
break;
case 'b':
bindto = optarg;
case 'p':
li = strtol(optarg, &end, 0);
if (*end) {
- errx(EINVAL, "Invalid port `%s'", optarg);
+ errx(EXIT_FAILURE, "Invalid port `%s'", optarg);
}
if (li < 1 || li > 65535) {
- errx(EINVAL, "Port out of range `%s'", optarg);
+ errx(EXIT_FAILURE, "Port out of range `%s'", optarg);
}
port = (uint16_t)li;
break;
case 'o':
dev_offset = strtoll (optarg, &end, 0);
if (*end) {
- errx(EINVAL, "Invalid offset `%s'", optarg);
+ errx(EXIT_FAILURE, "Invalid offset `%s'", optarg);
}
if (dev_offset < 0) {
- errx(EINVAL, "Offset must be positive `%s'", optarg);
+ errx(EXIT_FAILURE, "Offset must be positive `%s'", optarg);
}
break;
case 'r':
readonly = true;
+ flags &= ~BDRV_O_RDWR;
break;
case 'P':
partition = strtol(optarg, &end, 0);
if (*end)
- errx(EINVAL, "Invalid partition `%s'", optarg);
+ errx(EXIT_FAILURE, "Invalid partition `%s'", optarg);
if (partition < 1 || partition > 8)
- errx(EINVAL, "Invalid partition %d", partition);
+ errx(EXIT_FAILURE, "Invalid partition %d", partition);
break;
case 'k':
socket = optarg;
if (socket[0] != '/')
- errx(EINVAL, "socket path must be absolute\n");
+ errx(EXIT_FAILURE, "socket path must be absolute\n");
break;
case 'd':
disconnect = true;
case 'e':
shared = strtol(optarg, &end, 0);
if (*end) {
- errx(EINVAL, "Invalid shared device number '%s'", optarg);
+ errx(EXIT_FAILURE, "Invalid shared device number '%s'", optarg);
}
if (shared < 1) {
- errx(EINVAL, "Shared device number must be greater than 0\n");
+ errx(EXIT_FAILURE, "Shared device number must be greater than 0\n");
}
break;
case 't':
exit(0);
break;
case '?':
- errx(EINVAL, "Try `%s --help' for more information.",
+ errx(EXIT_FAILURE, "Try `%s --help' for more information.",
argv[0]);
}
}
if ((argc - optind) != 1) {
- errx(EINVAL, "Invalid number of argument.\n"
+ errx(EXIT_FAILURE, "Invalid number of argument.\n"
"Try `%s --help' for more information.",
argv[0]);
}
if (disconnect) {
fd = open(argv[optind], O_RDWR);
if (fd == -1)
- errx(errno, "Cannot open %s", argv[optind]);
+ err(EXIT_FAILURE, "Cannot open %s", argv[optind]);
nbd_disconnect(fd);
bdrv_init();
bs = bdrv_new("hda");
- if (bs == NULL)
- return 1;
- if (bdrv_open(bs, argv[optind], flags) == -1)
- return 1;
+ if ((ret = bdrv_open(bs, argv[optind], flags, NULL)) < 0) {
+ errno = -ret;
+ err(EXIT_FAILURE, "Failed to bdrv_open '%s'", argv[optind]);
+ }
fd_size = bs->total_sectors * 512;
if (partition != -1 &&
find_partition(bs, partition, &dev_offset, &fd_size))
- errx(errno, "Could not find partition %d", partition);
+ err(EXIT_FAILURE, "Could not find partition %d", partition);
if (device) {
pid_t pid;
int sock;
+ /* want to fail before daemonizing */
+ if (access(device, R_OK|W_OK) == -1) {
+ err(EXIT_FAILURE, "Could not access '%s'", device);
+ }
+
if (!verbose) {
/* detach client and server */
- if (daemon(0, 0) == -1) {
- errx(errno, "Failed to daemonize");
+ if (qemu_daemon(0, 0) == -1) {
+ err(EXIT_FAILURE, "Failed to daemonize");
}
}
do {
sock = unix_socket_outgoing(socket);
if (sock == -1) {
- if (errno != ENOENT && errno != ECONNREFUSED)
+ if (errno != ENOENT && errno != ECONNREFUSED) {
+ ret = 1;
goto out;
+ }
sleep(1); /* wait children */
}
} while (sock == -1);
goto out;
}
- ret = nbd_receive_negotiate(sock, &size, &blocksize);
+ ret = nbd_receive_negotiate(sock, NULL, &nbdflags,
+ &size, &blocksize);
if (ret == -1) {
ret = 1;
goto out;
show_parts(device);
- nbd_client(fd, sock);
+ ret = nbd_client(fd);
+ if (ret) {
+ ret = 1;
+ }
close(fd);
out:
kill(pid, SIGTERM);
max_fd = sharing_fds[0];
nb_fds++;
- data = qemu_memalign(512, NBD_BUFFER_SIZE);
+ data = qemu_blockalign(bs, NBD_BUFFER_SIZE);
if (data == NULL)
- errx(ENOMEM, "Cannot allocate data buffer");
+ errx(EXIT_FAILURE, "Cannot allocate data buffer");
do {
}
}
} while (persistent || nb_fds > 1);
- qemu_free(data);
+ qemu_vfree(data);
close(sharing_fds[0]);
bdrv_close(bs);
projects / qemu.git / blobdiff