void init_disk (void)
{
char **list;
char *msg;
int i;
char *path;
msg = xenbus_ls(XBT_NIL, "device/vbd", &list);
if (msg) {
printk("Error %s while reading list of disks\n", msg);
free(msg);
return;
}
blk_nb = 0;
while (list[blk_nb])
blk_nb++;
blk_dev = malloc(blk_nb * sizeof(*blk_dev));
blk_info = malloc(blk_nb * sizeof(*blk_info));
qsort(list, blk_nb, sizeof(*list), vbdcmp);
for (i = 0; i < blk_nb; i++) {
printk("vbd %s is hd%d\n", list[i], i);
asprintf(&path, "device/vbd/%s", list[i]);
blk_dev[i] = init_blkfront(path, &blk_info[i]);
free(path);
free(list[i]);
}
}
static int
devopen(int num)
{
int devnum = 768 + (num<<6);
char buf[32];
int nlocks;
if (blkopen[num]) {
blkopen[num]++;
return 1;
}
snprintf(buf, sizeof(buf), "device/vbd/%d", devnum);
rumpkern_unsched(&nlocks, NULL);
blkdevs[num] = init_blkfront(buf, &blkinfos[num]);
rumpkern_sched(nlocks, NULL);
if (blkdevs[num] != NULL) {
blkopen[num] = 1;
return 0;
} else {
return EIO; /* guess something */
}
}
