+
+ /*
+ * OK, the physical block hasn't been allocated yet.
+ * Allocate it.
+ */
+ if (!file->physblock) {
+ bmap_flags = (file->ino ? BMAP_ALLOC : 0);
+ if (fs->flags & EXT2_FLAG_SHARE_DUP) {
+ new_block = calloc(1, sizeof(*new_block));
+ if (!new_block) {
+ retval = EXT2_ET_NO_MEMORY;
+ goto fail;
+ }
+ ext2fs_sha512((const unsigned char*)file->buf,
+ fs->blocksize, new_block->sha);
+ old_block = ext2fs_hashmap_lookup(
+ fs->block_sha_map,
+ new_block->sha,
+ sizeof(new_block->sha));
+ }
+
+ if (old_block) {
+ file->physblock = old_block->physblock;
+ bmap_flags |= BMAP_SET;
+ free(new_block);
+ new_block = NULL;
+ }
+
+ retval = ext2fs_bmap2(fs, file->ino, &file->inode,
+ BMAP_BUFFER,
+ bmap_flags,
+ file->blockno, 0,
+ &file->physblock);
+ if (retval) {
+ free(new_block);
+ new_block = NULL;
+ goto fail;
+ }
+
+ if (new_block) {
+ new_block->physblock = file->physblock;
+ ext2fs_hashmap_add(fs->block_sha_map, new_block,
+ new_block->sha, sizeof(new_block->sha));
+ }
+
+ if (bmap_flags & BMAP_SET) {
+ ext2fs_iblk_add_blocks(fs, &file->inode, 1);
+ ext2fs_write_inode(fs, file->ino, &file->inode);
+ }
+ }
+