+/* Return size of device in bytes */
+int get_dev_size(int fd, char *dname, unsigned long long *sizep)
+{
+ unsigned long long ldsize;
+ struct stat st;
+
+ if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode))
+ ldsize = (unsigned long long)st.st_size;
+ else
+#ifdef BLKGETSIZE64
+ if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0)
+#endif
+ {
+ unsigned long dsize;
+ if (ioctl(fd, BLKGETSIZE, &dsize) == 0) {
+ ldsize = dsize;
+ ldsize <<= 9;
+ } else {
+ if (dname)
+ fprintf(stderr, Name ": Cannot get size of %s: %s\b",
+ dname, strerror(errno));
+ return 0;
+ }
+ }
+ *sizep = ldsize;
+ return 1;
+}
+
+void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk)
+{
+ int d;
+ ioctl(mdfd, GET_ARRAY_INFO, ainf);
+ for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++)
+ if (ioctl(mdfd, GET_DISK_INFO, disk) == 0)
+ return;
+}
+
+static int dev2major(int d)
+{
+ if (d >= 0)
+ return MD_MAJOR;
+ else
+ return get_mdp_major();
+}
+
+static int dev2minor(int d)
+{
+ if (d >= 0)
+ return d;
+ return (-1-d) << MdpMinorShift;
+}
+
+int find_free_devnum(int use_partitions)
+{
+ int devnum;
+ for (devnum = 127; devnum != 128;
+ devnum = devnum ? devnum-1 : (1<<22)-1) {
+ char *dn;
+ int _devnum;
+
+ _devnum = use_partitions ? (-1-devnum) : devnum;
+ if (mddev_busy(_devnum))
+ continue;
+ /* make sure it is new to /dev too, at least as a
+ * non-standard */
+ dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0);
+ if (dn && ! is_standard(dn, NULL))
+ continue;
+ break;
+ }
+ if (devnum == 128)
+ return NoMdDev;
+ return use_partitions ? (-1-devnum) : devnum;
+}
+