+ st = super_by_version(array.major_version,
+ array.minor_version);
+ if (!st) {
+ fprintf(stderr, Name ": unsupport array - version %d.%d\n",
+ array.major_version, array.minor_version);
+ return 1;
+ }
+
+ /* Make sure it isn't in use (in 2.6 or later) */
+ tfd = open(dv->devname, O_RDONLY|O_EXCL);
+ if (tfd < 0) {
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ dv->devname, strerror(errno));
+ return 1;
+ }
+ if (array.not_persistent==0)
+ st->ss->load_super(st, tfd, &osuper, NULL);
+ /* will use osuper later */
+ close(tfd);
+
+ if (array.major_version == 0 &&
+ md_get_version(fd)%100 < 2) {
+ if (ioctl(fd, HOT_ADD_DISK,
+ (unsigned long)stb.st_rdev)==0) {
+ if (verbose >= 0)
+ fprintf(stderr, Name ": hot added %s\n",
+ dv->devname);
+ continue;
+ }
+
+ fprintf(stderr, Name ": hot add failed for %s: %s\n",
+ dv->devname, strerror(errno));
+ return 1;
+ }
+
+ if (array.not_persistent == 0) {
+
+ /* need to find a sample superblock to copy, and
+ * a spare slot to use
+ */
+ for (j=0; j<st->max_devs; j++) {
+ char *dev;
+ int dfd;
+ disc.number = j;
+ if (ioctl(fd, GET_DISK_INFO, &disc))
+ continue;
+ if (disc.major==0 && disc.minor==0)
+ continue;
+ if ((disc.state & 4)==0) continue; /* sync */
+ /* Looks like a good device to try */
+ dev = map_dev(disc.major, disc.minor, 1);
+ if (!dev) continue;
+ dfd = dev_open(dev, O_RDONLY);
+ if (dfd < 0) continue;
+ if (st->ss->load_super(st, dfd, &dsuper, NULL)) {
+ close(dfd);
+ continue;
+ }
+ close(dfd);
+ break;
+ }
+ if (!dsuper) {
+ fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
+ return 1;
+ }
+ /* Possibly this device was recently part of the array
+ * and was temporarily removed, and is now being re-added.
+ * If so, we can simply re-add it.
+ */
+ st->ss->uuid_from_super(duuid, dsuper);
+
+ if (osuper) {
+ st->ss->uuid_from_super(ouuid, osuper);
+ if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
+ /* look close enough for now. Kernel
+ * will worry about where a bitmap
+ * based reconstruct is possible
+ */
+ struct mdinfo mdi;
+ st->ss->getinfo_super(&mdi, osuper);
+ disc.major = major(stb.st_rdev);
+ disc.minor = minor(stb.st_rdev);
+ disc.number = mdi.disk.number;
+ disc.raid_disk = mdi.disk.raid_disk;
+ disc.state = mdi.disk.state;
+ if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
+ if (verbose >= 0)
+ fprintf(stderr, Name ": re-added %s\n", dv->devname);
+ continue;
+ }
+ /* fall back on normal-add */
+ }
+ }