110 	struct dcssblk_dev_info *dev_info;  in dcssblk_release_segment()  local
113 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_release_segment()
114 	list_for_each_entry_safe(entry, temp, &dev_info->seg_list, lh) {  in dcssblk_release_segment()
118 	kfree(dev_info);  in dcssblk_release_segment()
129 dcssblk_assign_free_minor(struct dcssblk_dev_info *dev_info)  in dcssblk_assign_free_minor()  argument
134 	if (dev_info == NULL)  in dcssblk_assign_free_minor()
146 	dev_info->gd->first_minor = minor;  in dcssblk_assign_free_minor()
176 	struct dcssblk_dev_info *dev_info;  in dcssblk_get_segment_by_name()  local
179 	list_for_each_entry(dev_info, &dcssblk_devices, lh) {  in dcssblk_get_segment_by_name()
180 		list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_get_segment_by_name()
192 dcssblk_find_highest_addr(struct dcssblk_dev_info *dev_info)  in dcssblk_find_highest_addr()  argument
198 	list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_find_highest_addr()
209 dcssblk_find_lowest_addr(struct dcssblk_dev_info *dev_info)  in dcssblk_find_lowest_addr()  argument
217 	list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_find_lowest_addr()
233 dcssblk_is_continuous(struct dcssblk_dev_info *dev_info)  in dcssblk_is_continuous()  argument
238 	if (dev_info->num_of_segments <= 1)  in dcssblk_is_continuous()
241 	sort_list = kcalloc(dev_info->num_of_segments,  in dcssblk_is_continuous()
247 	list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_is_continuous()
253 	for (i = 0; i < dev_info->num_of_segments; i++)  in dcssblk_is_continuous()
254 		for (j = 0; j < dev_info->num_of_segments; j++)  in dcssblk_is_continuous()
265 	for (i = 0; i < dev_info->num_of_segments - 1; i++) {  in dcssblk_is_continuous()
337 	struct dcssblk_dev_info *dev_info;  in dcssblk_shared_show()  local
339 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_shared_show()
340 	return sprintf(buf, dev_info->is_shared ? "1\n" : "0\n");  in dcssblk_shared_show()
346 	struct dcssblk_dev_info *dev_info;  in dcssblk_shared_store()  local
353 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_shared_store()
354 	if (atomic_read(&dev_info->use_count)) {  in dcssblk_shared_store()
360 		list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_shared_store()
369 		dev_info->is_shared = 1;  in dcssblk_shared_store()
370 		switch (dev_info->segment_type) {  in dcssblk_shared_store()
374 			set_disk_ro(dev_info->gd, 1);  in dcssblk_shared_store()
378 		if (dev_info->segment_type == SEG_TYPE_SC) {  in dcssblk_shared_store()
381 			       dev_info->segment_name);  in dcssblk_shared_store()
385 		list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_shared_store()
394 		dev_info->is_shared = 0;  in dcssblk_shared_store()
395 		set_disk_ro(dev_info->gd, 0);  in dcssblk_shared_store()
405 	       "change\n", dev_info->segment_name);  in dcssblk_shared_store()
407 	list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_shared_store()
411 	list_del(&dev_info->lh);  in dcssblk_shared_store()
413 	kill_dax(dev_info->dax_dev);  in dcssblk_shared_store()
414 	put_dax(dev_info->dax_dev);  in dcssblk_shared_store()
415 	del_gendisk(dev_info->gd);  in dcssblk_shared_store()
416 	blk_cleanup_queue(dev_info->dcssblk_queue);  in dcssblk_shared_store()
417 	dev_info->gd->queue = NULL;  in dcssblk_shared_store()
418 	put_disk(dev_info->gd);  in dcssblk_shared_store()
443 	struct dcssblk_dev_info *dev_info;  in dcssblk_save_show()  local
445 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_save_show()
446 	return sprintf(buf, dev_info->save_pending ? "1\n" : "0\n");  in dcssblk_save_show()
452 	struct dcssblk_dev_info *dev_info;  in dcssblk_save_store()  local
457 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_save_store()
461 		if (atomic_read(&dev_info->use_count) == 0) {  in dcssblk_save_store()
464 				"saved\n", dev_info->segment_name);  in dcssblk_save_store()
465 			list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_save_store()
479 				dev_info->segment_name);  in dcssblk_save_store()
480 			dev_info->save_pending = 1;  in dcssblk_save_store()
483 		if (dev_info->save_pending) {  in dcssblk_save_store()
486 			dev_info->save_pending = 0;  in dcssblk_save_store()
489 				dev_info->segment_name);  in dcssblk_save_store()
510 	struct dcssblk_dev_info *dev_info;  in dcssblk_seglist_show()  local
514 	dev_info = container_of(dev, struct dcssblk_dev_info, dev);  in dcssblk_seglist_show()
517 	list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_seglist_show()
549 	struct dcssblk_dev_info *dev_info;  in dcssblk_add_store()  local
554 	dev_info = NULL;  in dcssblk_add_store()
595 			dev_info = kzalloc(sizeof(struct dcssblk_dev_info),  in dcssblk_add_store()
597 			if (dev_info == NULL) {  in dcssblk_add_store()
601 			strcpy(dev_info->segment_name, local_buf);  in dcssblk_add_store()
602 			dev_info->segment_type = seg_info->segment_type;  in dcssblk_add_store()
603 			INIT_LIST_HEAD(&dev_info->seg_list);  in dcssblk_add_store()
605 		list_add_tail(&seg_info->lh, &dev_info->seg_list);  in dcssblk_add_store()
619 	dev_info->num_of_segments = num_of_segments;  in dcssblk_add_store()
620 	rc = dcssblk_is_continuous(dev_info);  in dcssblk_add_store()
624 	dev_info->start = dcssblk_find_lowest_addr(dev_info);  in dcssblk_add_store()
625 	dev_info->end = dcssblk_find_highest_addr(dev_info);  in dcssblk_add_store()
627 	dev_set_name(&dev_info->dev, "%s", dev_info->segment_name);  in dcssblk_add_store()
628 	dev_info->dev.release = dcssblk_release_segment;  in dcssblk_add_store()
629 	dev_info->dev.groups = dcssblk_dev_attr_groups;  in dcssblk_add_store()
630 	INIT_LIST_HEAD(&dev_info->lh);  in dcssblk_add_store()
631 	dev_info->gd = alloc_disk(DCSSBLK_MINORS_PER_DISK);  in dcssblk_add_store()
632 	if (dev_info->gd == NULL) {  in dcssblk_add_store()
636 	dev_info->gd->major = dcssblk_major;  in dcssblk_add_store()
637 	dev_info->gd->fops = &dcssblk_devops;  in dcssblk_add_store()
638 	dev_info->dcssblk_queue = blk_alloc_queue(GFP_KERNEL);  in dcssblk_add_store()
639 	dev_info->gd->queue = dev_info->dcssblk_queue;  in dcssblk_add_store()
640 	dev_info->gd->private_data = dev_info;  in dcssblk_add_store()
641 	blk_queue_make_request(dev_info->dcssblk_queue, dcssblk_make_request);  in dcssblk_add_store()
642 	blk_queue_logical_block_size(dev_info->dcssblk_queue, 4096);  in dcssblk_add_store()
643 	blk_queue_flag_set(QUEUE_FLAG_DAX, dev_info->dcssblk_queue);  in dcssblk_add_store()
645 	seg_byte_size = (dev_info->end - dev_info->start + 1);  in dcssblk_add_store()
646 	set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors  in dcssblk_add_store()
650 	dev_info->save_pending = 0;  in dcssblk_add_store()
651 	dev_info->is_shared = 1;  in dcssblk_add_store()
652 	dev_info->dev.parent = dcssblk_root_dev;  in dcssblk_add_store()
662 	rc = dcssblk_assign_free_minor(dev_info);  in dcssblk_add_store()
665 	sprintf(dev_info->gd->disk_name, "dcssblk%d",  in dcssblk_add_store()
666 		dev_info->gd->first_minor);  in dcssblk_add_store()
667 	list_add_tail(&dev_info->lh, &dcssblk_devices);  in dcssblk_add_store()
676 	rc = device_register(&dev_info->dev);  in dcssblk_add_store()
680 	dev_info->dax_dev = alloc_dax(dev_info, dev_info->gd->disk_name,  in dcssblk_add_store()
682 	if (!dev_info->dax_dev) {  in dcssblk_add_store()
687 	get_device(&dev_info->dev);  in dcssblk_add_store()
688 	device_add_disk(&dev_info->dev, dev_info->gd);  in dcssblk_add_store()
690 	switch (dev_info->segment_type) {  in dcssblk_add_store()
694 			set_disk_ro(dev_info->gd,1);  in dcssblk_add_store()
697 			set_disk_ro(dev_info->gd,0);  in dcssblk_add_store()
705 	list_del(&dev_info->lh);  in dcssblk_add_store()
706 	blk_cleanup_queue(dev_info->dcssblk_queue);  in dcssblk_add_store()
707 	dev_info->gd->queue = NULL;  in dcssblk_add_store()
708 	put_disk(dev_info->gd);  in dcssblk_add_store()
709 	list_for_each_entry(seg_info, &dev_info->seg_list, lh) {  in dcssblk_add_store()
712 	put_device(&dev_info->dev);  in dcssblk_add_store()
716 	list_del(&dev_info->lh);  in dcssblk_add_store()
718 	blk_cleanup_queue(dev_info->dcssblk_queue);  in dcssblk_add_store()
719 	dev_info->gd->queue = NULL;  in dcssblk_add_store()
720 	put_disk(dev_info->gd);  in dcssblk_add_store()
723 	if (dev_info == NULL)  in dcssblk_add_store()
725 	list_for_each_entry_safe(seg_info, temp, &dev_info->seg_list, lh) {  in dcssblk_add_store()
730 	kfree(dev_info);  in dcssblk_add_store()
743 	struct dcssblk_dev_info *dev_info;  in dcssblk_remove_store()  local
768 	dev_info = dcssblk_get_device_by_name(local_buf);  in dcssblk_remove_store()
769 	if (dev_info == NULL) {  in dcssblk_remove_store()
776 	if (atomic_read(&dev_info->use_count) != 0) {  in dcssblk_remove_store()
784 	list_del(&dev_info->lh);  in dcssblk_remove_store()
785 	kill_dax(dev_info->dax_dev);  in dcssblk_remove_store()
786 	put_dax(dev_info->dax_dev);  in dcssblk_remove_store()
787 	del_gendisk(dev_info->gd);  in dcssblk_remove_store()
788 	blk_cleanup_queue(dev_info->dcssblk_queue);  in dcssblk_remove_store()
789 	dev_info->gd->queue = NULL;  in dcssblk_remove_store()
790 	put_disk(dev_info->gd);  in dcssblk_remove_store()
793 	list_for_each_entry(entry, &dev_info->seg_list, lh)  in dcssblk_remove_store()
798 	device_unregister(&dev_info->dev);  in dcssblk_remove_store()
799 	put_device(&dev_info->dev);  in dcssblk_remove_store()
810 	struct dcssblk_dev_info *dev_info;  in dcssblk_open()  local
813 	dev_info = bdev->bd_disk->private_data;  in dcssblk_open()
814 	if (NULL == dev_info) {  in dcssblk_open()
818 	atomic_inc(&dev_info->use_count);  in dcssblk_open()
828 	struct dcssblk_dev_info *dev_info = disk->private_data;  in dcssblk_release()  local
831 	if (!dev_info) {  in dcssblk_release()
836 	if (atomic_dec_and_test(&dev_info->use_count)  in dcssblk_release()
837 	    && (dev_info->save_pending)) {  in dcssblk_release()
839 			"now\n", dev_info->segment_name);  in dcssblk_release()
840 		list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_release()
848 		dev_info->save_pending = 0;  in dcssblk_release()
856 	struct dcssblk_dev_info *dev_info;  in dcssblk_make_request()  local
867 	dev_info = bio->bi_disk->private_data;  in dcssblk_make_request()
868 	if (dev_info == NULL)  in dcssblk_make_request()
879 	if (dev_info->is_shared) {  in dcssblk_make_request()
880 		switch (dev_info->segment_type) {  in dcssblk_make_request()
887 					dev_name(&dev_info->dev));  in dcssblk_make_request()
897 		source_addr = dev_info->start + (index<<12) + bytes_done;  in dcssblk_make_request()
918 __dcssblk_direct_access(struct dcssblk_dev_info *dev_info, pgoff_t pgoff,  in __dcssblk_direct_access()  argument
924 	dev_sz = dev_info->end - dev_info->start + 1;  in __dcssblk_direct_access()
926 		*kaddr = (void *) dev_info->start + offset;  in __dcssblk_direct_access()
928 		*pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset),  in __dcssblk_direct_access()
938 	struct dcssblk_dev_info *dev_info = dax_get_private(dax_dev);  in dcssblk_dax_direct_access()  local
940 	return __dcssblk_direct_access(dev_info, pgoff, nr_pages, kaddr, pfn);  in dcssblk_dax_direct_access()
948 	struct dcssblk_dev_info *dev_info;  in dcssblk_check_params()  local
967 				dev_info = dcssblk_get_device_by_name(buf);  in dcssblk_check_params()
969 				if (dev_info)  in dcssblk_check_params()
970 					dcssblk_shared_store(&dev_info->dev,  in dcssblk_check_params()
990 	struct dcssblk_dev_info *dev_info;  in dcssblk_freeze()  local
993 	list_for_each_entry(dev_info, &dcssblk_devices, lh) {  in dcssblk_freeze()
994 		switch (dev_info->segment_type) {  in dcssblk_freeze()
998 				if (!dev_info->is_shared)  in dcssblk_freeze()
1011 		       dev_info->segment_name);  in dcssblk_freeze()
1017 	struct dcssblk_dev_info *dev_info;  in dcssblk_restore()  local
1022 	list_for_each_entry(dev_info, &dcssblk_devices, lh) {  in dcssblk_restore()
1023 		list_for_each_entry(entry, &dev_info->seg_list, lh) {  in dcssblk_restore()