+static int add_internal_bitmap0(struct supertype *st, int *chunkp,
+ int delay, int write_behind,
+ unsigned long long size, int may_change,
+ int major)
+{
+ /*
+ * The bitmap comes immediately after the superblock and must be 60K in size
+ * at most. The default size is between 30K and 60K
+ *
+ * size is in sectors, chunk is in bytes !!!
+ */
+ unsigned long long bits;
+ unsigned long long max_bits = 60*1024*8;
+ unsigned long long min_chunk;
+ int chunk = *chunkp;
+ mdp_super_t *sb = st->sb;
+ bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES);
+
+
+ min_chunk = 4096; /* sub-page chunks don't work yet.. */
+ bits = (size * 512) / min_chunk + 1;
+ while (bits > max_bits) {
+ min_chunk *= 2;
+ bits = (bits+1)/2;
+ }
+ if (chunk == UnSet)
+ chunk = min_chunk;
+ else if (chunk < min_chunk)
+ return 0; /* chunk size too small */
+
+ sb->state |= (1<<MD_SB_BITMAP_PRESENT);
+
+ memset(bms, 0, sizeof(*bms));
+ bms->magic = __cpu_to_le32(BITMAP_MAGIC);
+ bms->version = __cpu_to_le32(major);
+ uuid_from_super0(st, (int*)bms->uuid);
+ bms->chunksize = __cpu_to_le32(chunk);
+ bms->daemon_sleep = __cpu_to_le32(delay);
+ bms->sync_size = __cpu_to_le64(size);
+ bms->write_behind = __cpu_to_le32(write_behind);
+ *chunkp = chunk;
+ return 1;
+}
+
+
+void locate_bitmap0(struct supertype *st, int fd)
+{
+ unsigned long long dsize;
+ unsigned long long offset;
+
+ if (!get_dev_size(fd, NULL, &dsize))
+ return;
+
+ if (dsize < MD_RESERVED_SECTORS*512)
+ return;
+
+ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
+
+ offset *= 512;
+
+ offset += MD_SB_BYTES;
+
+ lseek64(fd, offset, 0);
+}
+
+int write_bitmap0(struct supertype *st, int fd)
+{
+ unsigned long long dsize;
+ unsigned long long offset;
+ mdp_super_t *sb = st->sb;
+
+ int rv = 0;
+
+ int towrite, n;
+ char buf[4096];
+
+ if (!get_dev_size(fd, NULL, &dsize))
+ return 1;
+
+
+ if (dsize < MD_RESERVED_SECTORS*512)
+ return -1;
+
+ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
+
+ offset *= 512;
+
+ if (lseek64(fd, offset + 4096, 0)< 0LL)
+ return 3;
+
+
+ if (write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)) !=
+ sizeof(bitmap_super_t))
+ return -2;
+ towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t);
+ memset(buf, 0xff, sizeof(buf));
+ while (towrite > 0) {
+ n = towrite;
+ if (n > sizeof(buf))
+ n = sizeof(buf);
+ n = write(fd, buf, n);
+ if (n > 0)
+ towrite -= n;
+ else
+ break;
+ }
+ fsync(fd);
+ if (towrite)
+ rv = -2;
+
+ return rv;
+}
+
+static void free_super0(struct supertype *st)
+{
+ if (st->sb)
+ free(st->sb);
+ st->sb = NULL;
+}
+
+static int validate_geometry0(struct supertype *st, int level,
+ int layout, int raiddisks,
+ int chunk, unsigned long long size,
+ char *subdev, unsigned long long *freesize)
+{
+ unsigned long long ldsize;
+ int fd;
+
+ if (level == LEVEL_CONTAINER)
+ return 0;
+ if (raiddisks > MD_SB_DISKS)
+ return 0;
+ if (size > (0x7fffffffULL<<10))
+ return 0;
+ if (!subdev)
+ return 1;
+
+ fd = open(subdev, O_RDONLY|O_EXCL, 0);
+ if (fd < 0) {
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ subdev, strerror(errno));
+ return 0;
+ }
+ if (!get_dev_size(fd, subdev, &ldsize)) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+
+ if (ldsize < MD_RESERVED_SECTORS * 512)
+ return 0;
+ if (size > (0x7fffffffULL<<10))
+ return 0;
+ *freesize = MD_NEW_SIZE_SECTORS(ldsize >> 9);
+ return 1;
+}
+