--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/qemu-nbd.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,478 @@
+/*
+ * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws>
+ *
+ * Network Block Device
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <qemu-common.h>
+#include "block_int.h"
+#include "nbd.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <err.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <signal.h>
+
+#define SOCKET_PATH "/var/lock/qemu-nbd-%s"
+
+#define NBD_BUFFER_SIZE (1024*1024)
+
+static int verbose;
+
+static void usage(const char *name)
+{
+ printf(
+"Usage: %s [OPTIONS] FILE\n"
+"QEMU Disk Network Block Device Server\n"
+"\n"
+" -p, --port=PORT port to listen on (default `1024')\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"
+" (default '"SOCKET_PATH"')\n"
+" -r, --read-only export read-only\n"
+" -P, --partition=NUM only expose partition NUM\n"
+" -s, --snapshot use snapshot file\n"
+" -n, --nocache disable host cache\n"
+" -c, --connect=DEV connect FILE to the local NBD device DEV\n"
+" -d, --disconnect disconnect the specified device\n"
+" -e, --shared=NUM device can be shared by NUM clients (default '1')\n"
+" -t, --persistent don't exit on the last connection\n"
+" -v, --verbose display extra debugging information\n"
+" -h, --help display this help and exit\n"
+" -V, --version output version information and exit\n"
+"\n"
+"Report bugs to <anthony@codemonkey.ws>\n"
+ , name, "DEVICE");
+}
+
+static void version(const char *name)
+{
+ printf(
+"%s version 0.0.1\n"
+"Written by Anthony Liguori.\n"
+"\n"
+"Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n"
+"This is free software; see the source for copying conditions. There is NO\n"
+"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+ , name);
+}
+
+struct partition_record
+{
+ uint8_t bootable;
+ uint8_t start_head;
+ uint32_t start_cylinder;
+ uint8_t start_sector;
+ uint8_t system;
+ uint8_t end_head;
+ uint8_t end_cylinder;
+ uint8_t end_sector;
+ uint32_t start_sector_abs;
+ uint32_t nb_sectors_abs;
+};
+
+static void read_partition(uint8_t *p, struct partition_record *r)
+{
+ r->bootable = p[0];
+ r->start_head = p[1];
+ r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300);
+ r->start_sector = p[2] & 0x3f;
+ r->system = p[4];
+ r->end_head = p[5];
+ r->end_cylinder = p[7] | ((p[6] << 2) & 0x300);
+ r->end_sector = p[6] & 0x3f;
+ r->start_sector_abs = p[8] | p[9] << 8 | p[10] << 16 | p[11] << 24;
+ r->nb_sectors_abs = p[12] | p[13] << 8 | p[14] << 16 | p[15] << 24;
+}
+
+static int find_partition(BlockDriverState *bs, int partition,
+ off_t *offset, off_t *size)
+{
+ struct partition_record mbr[4];
+ uint8_t data[512];
+ int i;
+ int ext_partnum = 4;
+
+ if (bdrv_read(bs, 0, data, 1))
+ errx(EINVAL, "error while reading");
+
+ if (data[510] != 0x55 || data[511] != 0xaa) {
+ errno = -EINVAL;
+ return -1;
+ }
+
+ for (i = 0; i < 4; i++) {
+ read_partition(&data[446 + 16 * i], &mbr[i]);
+
+ if (!mbr[i].nb_sectors_abs)
+ continue;
+
+ if (mbr[i].system == 0xF || mbr[i].system == 0x5) {
+ struct partition_record ext[4];
+ uint8_t data1[512];
+ int j;
+
+ if (bdrv_read(bs, mbr[i].start_sector_abs, data1, 1))
+ errx(EINVAL, "error while reading");
+
+ for (j = 0; j < 4; j++) {
+ read_partition(&data1[446 + 16 * j], &ext[j]);
+ if (!ext[j].nb_sectors_abs)
+ continue;
+
+ if ((ext_partnum + j + 1) == partition) {
+ *offset = (uint64_t)ext[j].start_sector_abs << 9;
+ *size = (uint64_t)ext[j].nb_sectors_abs << 9;
+ return 0;
+ }
+ }
+ ext_partnum += 4;
+ } else if ((i + 1) == partition) {
+ *offset = (uint64_t)mbr[i].start_sector_abs << 9;
+ *size = (uint64_t)mbr[i].nb_sectors_abs << 9;
+ return 0;
+ }
+ }
+
+ errno = -ENOENT;
+ return -1;
+}
+
+static void show_parts(const char *device)
+{
+ if (fork() == 0) {
+ int nbd;
+
+ /* linux just needs an open() to trigger
+ * the partition table update
+ * but remember to load the module with max_part != 0 :
+ * modprobe nbd max_part=63
+ */
+ nbd = open(device, O_RDWR);
+ if (nbd != -1)
+ close(nbd);
+ exit(0);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ BlockDriverState *bs;
+ off_t dev_offset = 0;
+ off_t offset = 0;
+ bool readonly = false;
+ bool disconnect = false;
+ const char *bindto = "0.0.0.0";
+ int port = 1024;
+ struct sockaddr_in addr;
+ socklen_t addr_len = sizeof(addr);
+ off_t fd_size;
+ char *device = NULL;
+ char *socket = NULL;
+ char sockpath[128];
+ const char *sopt = "hVbo:p:rsnP:c:dvk:e:t";
+ struct option lopt[] = {
+ { "help", 0, 0, 'h' },
+ { "version", 0, 0, 'V' },
+ { "bind", 1, 0, 'b' },
+ { "port", 1, 0, 'p' },
+ { "socket", 1, 0, 'k' },
+ { "offset", 1, 0, 'o' },
+ { "read-only", 0, 0, 'r' },
+ { "partition", 1, 0, 'P' },
+ { "connect", 1, 0, 'c' },
+ { "disconnect", 0, 0, 'd' },
+ { "snapshot", 0, 0, 's' },
+ { "nocache", 0, 0, 'n' },
+ { "shared", 1, 0, 'e' },
+ { "persistent", 0, 0, 't' },
+ { "verbose", 0, 0, 'v' },
+ { NULL, 0, 0, 0 }
+ };
+ int ch;
+ int opt_ind = 0;
+ int li;
+ char *end;
+ int flags = 0;
+ int partition = -1;
+ int ret;
+ int shared = 1;
+ uint8_t *data;
+ fd_set fds;
+ int *sharing_fds;
+ int fd;
+ int i;
+ int nb_fds = 0;
+ int max_fd;
+ int persistent = 0;
+
+ while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
+ switch (ch) {
+ case 's':
+ flags |= BDRV_O_SNAPSHOT;
+ break;
+ case 'n':
+ flags |= BDRV_O_NOCACHE;
+ break;
+ case 'b':
+ bindto = optarg;
+ break;
+ case 'p':
+ li = strtol(optarg, &end, 0);
+ if (*end) {
+ errx(EINVAL, "Invalid port `%s'", optarg);
+ }
+ if (li < 1 || li > 65535) {
+ errx(EINVAL, "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);
+ }
+ if (dev_offset < 0) {
+ errx(EINVAL, "Offset must be positive `%s'", optarg);
+ }
+ break;
+ case 'r':
+ readonly = true;
+ break;
+ case 'P':
+ partition = strtol(optarg, &end, 0);
+ if (*end)
+ errx(EINVAL, "Invalid partition `%s'", optarg);
+ if (partition < 1 || partition > 8)
+ errx(EINVAL, "Invalid partition %d", partition);
+ break;
+ case 'k':
+ socket = optarg;
+ if (socket[0] != '/')
+ errx(EINVAL, "socket path must be absolute\n");
+ break;
+ case 'd':
+ disconnect = true;
+ break;
+ case 'c':
+ device = optarg;
+ break;
+ case 'e':
+ shared = strtol(optarg, &end, 0);
+ if (*end) {
+ errx(EINVAL, "Invalid shared device number '%s'", optarg);
+ }
+ if (shared < 1) {
+ errx(EINVAL, "Shared device number must be greater than 0\n");
+ }
+ break;
+ case 't':
+ persistent = 1;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'V':
+ version(argv[0]);
+ exit(0);
+ break;
+ case 'h':
+ usage(argv[0]);
+ exit(0);
+ break;
+ case '?':
+ errx(EINVAL, "Try `%s --help' for more information.",
+ argv[0]);
+ }
+ }
+
+ if ((argc - optind) != 1) {
+ errx(EINVAL, "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]);
+
+ nbd_disconnect(fd);
+
+ close(fd);
+
+ printf("%s disconnected\n", argv[optind]);
+
+ return 0;
+ }
+
+ bdrv_init();
+
+ bs = bdrv_new("hda");
+ if (bs == NULL)
+ return 1;
+
+ if (bdrv_open(bs, argv[optind], flags) == -1)
+ return 1;
+
+ 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);
+
+ if (device) {
+ pid_t pid;
+ int sock;
+
+ if (!verbose)
+ daemon(0, 0); /* detach client and server */
+
+ if (socket == NULL) {
+ sprintf(sockpath, SOCKET_PATH, basename(device));
+ socket = sockpath;
+ }
+
+ pid = fork();
+ if (pid < 0)
+ return 1;
+ if (pid != 0) {
+ off_t size;
+ size_t blocksize;
+
+ ret = 0;
+ bdrv_close(bs);
+
+ do {
+ sock = unix_socket_outgoing(socket);
+ if (sock == -1) {
+ if (errno != ENOENT && errno != ECONNREFUSED)
+ goto out;
+ sleep(1); /* wait children */
+ }
+ } while (sock == -1);
+
+ fd = open(device, O_RDWR);
+ if (fd == -1) {
+ ret = 1;
+ goto out;
+ }
+
+ ret = nbd_receive_negotiate(sock, &size, &blocksize);
+ if (ret == -1) {
+ ret = 1;
+ goto out;
+ }
+
+ ret = nbd_init(fd, sock, size, blocksize);
+ if (ret == -1) {
+ ret = 1;
+ goto out;
+ }
+
+ printf("NBD device %s is now connected to file %s\n",
+ device, argv[optind]);
+
+ /* update partition table */
+
+ show_parts(device);
+
+ nbd_client(fd, sock);
+ close(fd);
+ out:
+ kill(pid, SIGTERM);
+ unlink(socket);
+
+ return ret;
+ }
+ /* children */
+ }
+
+ sharing_fds = qemu_malloc((shared + 1) * sizeof(int));
+ if (sharing_fds == NULL)
+ errx(ENOMEM, "Cannot allocate sharing fds");
+
+ if (socket) {
+ sharing_fds[0] = unix_socket_incoming(socket);
+ } else {
+ sharing_fds[0] = tcp_socket_incoming(bindto, port);
+ }
+
+ if (sharing_fds[0] == -1)
+ return 1;
+ max_fd = sharing_fds[0];
+ nb_fds++;
+
+ data = qemu_memalign(512, NBD_BUFFER_SIZE);
+ if (data == NULL)
+ errx(ENOMEM, "Cannot allocate data buffer");
+
+ do {
+
+ FD_ZERO(&fds);
+ for (i = 0; i < nb_fds; i++)
+ FD_SET(sharing_fds[i], &fds);
+
+ ret = select(max_fd + 1, &fds, NULL, NULL, NULL);
+ if (ret == -1)
+ break;
+
+ if (FD_ISSET(sharing_fds[0], &fds))
+ ret--;
+ for (i = 1; i < nb_fds && ret; i++) {
+ if (FD_ISSET(sharing_fds[i], &fds)) {
+ if (nbd_trip(bs, sharing_fds[i], fd_size, dev_offset,
+ &offset, readonly, data, NBD_BUFFER_SIZE) != 0) {
+ close(sharing_fds[i]);
+ nb_fds--;
+ sharing_fds[i] = sharing_fds[nb_fds];
+ i--;
+ }
+ ret--;
+ }
+ }
+ /* new connection ? */
+ if (FD_ISSET(sharing_fds[0], &fds)) {
+ if (nb_fds < shared + 1) {
+ sharing_fds[nb_fds] = accept(sharing_fds[0],
+ (struct sockaddr *)&addr,
+ &addr_len);
+ if (sharing_fds[nb_fds] != -1 &&
+ nbd_negotiate(sharing_fds[nb_fds], fd_size) != -1) {
+ if (sharing_fds[nb_fds] > max_fd)
+ max_fd = sharing_fds[nb_fds];
+ nb_fds++;
+ }
+ }
+ }
+ } while (persistent || nb_fds > 1);
+ qemu_free(data);
+
+ close(sharing_fds[0]);
+ bdrv_close(bs);
+ qemu_free(sharing_fds);
+ if (socket)
+ unlink(socket);
+
+ return 0;
+}