166 	struct mddev *mddev; /* the md device that the bitmap is for */  member
222 	return bitmap->mddev ? mdname(bitmap->mddev) : "mdX";  in bmname()
231 static bool bitmap_enabled(struct mddev *mddev)  in bitmap_enabled()  argument
233 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_enabled()
345 static int read_sb_page(struct mddev *mddev, loff_t offset,  in read_sb_page()  argument
349 	sector_t sector = mddev->bitmap_info.offset + offset +  in read_sb_page()
353 	rdev_for_each(rdev, mddev) {  in read_sb_page()
367 static struct md_rdev *next_active_rdev(struct md_rdev *rdev, struct mddev *mddev)  in next_active_rdev()  argument
385 		rdev = list_entry(&mddev->disks, struct md_rdev, same_set);  in next_active_rdev()
388 		rdev_dec_pending(rdev, mddev);  in next_active_rdev()
390 	list_for_each_entry_continue_rcu(rdev, &mddev->disks, same_set) {  in next_active_rdev()
429 	struct mddev *mddev = bitmap->mddev;  in __write_sb_page()  local
433 	loff_t sboff, offset = mddev->bitmap_info.offset;  in __write_sb_page()
454 	if (mddev->external) {  in __write_sb_page()
457 		    sboff < (doff + mddev->dev_sectors + PAGE_SIZE / SECTOR_SIZE))  in __write_sb_page()
466 		if (doff + mddev->dev_sectors > sboff)  in __write_sb_page()
477 	md_super_write(mddev, rdev, sboff + ps, (int)min(size, bitmap_limit), page);  in __write_sb_page()
484 	struct mddev *mddev = bitmap->mddev;  in write_sb_page()  local
489 		while ((rdev = next_active_rdev(rdev, mddev)) != NULL) {  in write_sb_page()
495 	} while (wait && md_super_wait(mddev) < 0);  in write_sb_page()
642 	if (mddev_is_clustered(bitmap->mddev)) {  in filemap_write_page()
671 		md_super_wait(bitmap->mddev);  in md_bitmap_wait_writes()
681 	if (!bitmap || !bitmap->mddev) /* no bitmap for this array */  in bitmap_update_sb()
683 	if (bitmap->mddev->bitmap_info.external)  in bitmap_update_sb()
688 	sb->events = cpu_to_le64(bitmap->mddev->events);  in bitmap_update_sb()
689 	if (bitmap->mddev->events < bitmap->events_cleared)  in bitmap_update_sb()
691 		bitmap->events_cleared = bitmap->mddev->events;  in bitmap_update_sb()
699 	sb->daemon_sleep = cpu_to_le32(bitmap->mddev->bitmap_info.daemon_sleep/HZ);  in bitmap_update_sb()
700 	sb->write_behind = cpu_to_le32(bitmap->mddev->bitmap_info.max_write_behind);  in bitmap_update_sb()
702 	sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);  in bitmap_update_sb()
703 	sb->chunksize = cpu_to_le32(bitmap->mddev->bitmap_info.chunksize);  in bitmap_update_sb()
704 	sb->nodes = cpu_to_le32(bitmap->mddev->bitmap_info.nodes);  in bitmap_update_sb()
705 	sb->sectors_reserved = cpu_to_le32(bitmap->mddev->  in bitmap_update_sb()
770 	chunksize = bitmap->mddev->bitmap_info.chunksize;  in md_bitmap_new_disk_sb()
779 	daemon_sleep = bitmap->mddev->bitmap_info.daemon_sleep;  in md_bitmap_new_disk_sb()
785 	bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep;  in md_bitmap_new_disk_sb()
791 	write_behind = bitmap->mddev->bitmap_info.max_write_behind;  in md_bitmap_new_disk_sb()
795 	bitmap->mddev->bitmap_info.max_write_behind = write_behind;  in md_bitmap_new_disk_sb()
798 	sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);  in md_bitmap_new_disk_sb()
800 	memcpy(sb->uuid, bitmap->mddev->uuid, 16);  in md_bitmap_new_disk_sb()
804 	bitmap->events_cleared = bitmap->mddev->events;  in md_bitmap_new_disk_sb()
805 	sb->events_cleared = cpu_to_le64(bitmap->mddev->events);  in md_bitmap_new_disk_sb()
806 	bitmap->mddev->bitmap_info.nodes = 0;  in md_bitmap_new_disk_sb()
826 	if (!bitmap->storage.file && !bitmap->mddev->bitmap_info.offset) {  in md_bitmap_read_sb()
843 		sector_t bm_blocks = bitmap->mddev->resync_max_sectors;  in md_bitmap_read_sb()
846 			   (bitmap->mddev->bitmap_info.chunksize >> 9));  in md_bitmap_read_sb()
863 		err = read_sb_page(bitmap->mddev, offset, sb_page, 0,  in md_bitmap_read_sb()
903 		strscpy(bitmap->mddev->bitmap_info.cluster_name,  in md_bitmap_read_sb()
908 	sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);  in md_bitmap_read_sb()
910 	if (bitmap->mddev->persistent) {  in md_bitmap_read_sb()
915 		if (memcmp(sb->uuid, bitmap->mddev->uuid, 16)) {  in md_bitmap_read_sb()
921 		if (!nodes && (events < bitmap->mddev->events)) {  in md_bitmap_read_sb()
924 				(unsigned long long) bitmap->mddev->events);  in md_bitmap_read_sb()
940 		bitmap->mddev->bitmap_info.chunksize = chunksize;  in md_bitmap_read_sb()
941 		err = md_setup_cluster(bitmap->mddev, nodes);  in md_bitmap_read_sb()
947 		bitmap->cluster_slot = bitmap->mddev->cluster_ops->slot_number(bitmap->mddev);  in md_bitmap_read_sb()
954 			bitmap->events_cleared = bitmap->mddev->events;  in md_bitmap_read_sb()
955 		bitmap->mddev->bitmap_info.chunksize = chunksize;  in md_bitmap_read_sb()
956 		bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep;  in md_bitmap_read_sb()
957 		bitmap->mddev->bitmap_info.max_write_behind = write_behind;  in md_bitmap_read_sb()
958 		bitmap->mddev->bitmap_info.nodes = nodes;  in md_bitmap_read_sb()
959 		if (bitmap->mddev->bitmap_info.space == 0 ||  in md_bitmap_read_sb()
960 			bitmap->mddev->bitmap_info.space > sectors_reserved)  in md_bitmap_read_sb()
961 			bitmap->mddev->bitmap_info.space = sectors_reserved;  in md_bitmap_read_sb()
965 			md_cluster_stop(bitmap->mddev);  in md_bitmap_read_sb()
1157 	if (mddev_is_clustered(bitmap->mddev))  in md_bitmap_file_set_bit()
1188 	if (mddev_is_clustered(bitmap->mddev))  in md_bitmap_file_clear_bit()
1249 				mddev_add_trace_msg(bitmap->mddev,  in __bitmap_unplug()
1293 static void bitmap_unplug(struct mddev *mddev, bool sync)  in bitmap_unplug()  argument
1295 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_unplug()
1322 	struct mddev *mddev = bitmap->mddev;  in md_bitmap_init_from_disk()  local
1331 	if (!file && !mddev->bitmap_info.offset) {  in md_bitmap_init_from_disk()
1355 	if (mddev_is_clustered(mddev))  in md_bitmap_init_from_disk()
1371 			ret = read_sb_page(mddev, 0, page, i + node_offset,  in md_bitmap_init_from_disk()
1386 			if (i == 0 && !mddev->bitmap_info.external)  in md_bitmap_init_from_disk()
1442 static void bitmap_write_all(struct mddev *mddev)  in bitmap_write_all()  argument
1445 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_write_all()
1482 static void mddev_set_timeout(struct mddev *mddev, unsigned long timeout,  in mddev_set_timeout()  argument
1488 	thread = rcu_dereference(mddev->thread);  in mddev_set_timeout()
1504 static void bitmap_daemon_work(struct mddev *mddev)  in bitmap_daemon_work()  argument
1515 	mutex_lock(&mddev->bitmap_info.mutex);  in bitmap_daemon_work()
1516 	bitmap = mddev->bitmap;  in bitmap_daemon_work()
1518 		mutex_unlock(&mddev->bitmap_info.mutex);  in bitmap_daemon_work()
1522 			+ mddev->bitmap_info.daemon_sleep))  in bitmap_daemon_work()
1527 		mddev_set_timeout(mddev, MAX_SCHEDULE_TIMEOUT, true);  in bitmap_daemon_work()
1532 	mddev_add_trace_msg(bitmap->mddev, "md bitmap_daemon_work");  in bitmap_daemon_work()
1545 	    mddev->bitmap_info.external == 0) {  in bitmap_daemon_work()
1621 		mddev_set_timeout(mddev, mddev->bitmap_info.daemon_sleep, true);  in bitmap_daemon_work()
1622 	mutex_unlock(&mddev->bitmap_info.mutex);  in bitmap_daemon_work()
1675 static int bitmap_startwrite(struct mddev *mddev, sector_t offset,  in bitmap_startwrite()  argument
1678 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_startwrite()
1730 static void bitmap_endwrite(struct mddev *mddev, sector_t offset,  in bitmap_endwrite()  argument
1733 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_endwrite()
1750 		if (!bitmap->mddev->degraded) {  in bitmap_endwrite()
1751 			if (bitmap->events_cleared < bitmap->mddev->events) {  in bitmap_endwrite()
1752 				bitmap->events_cleared = bitmap->mddev->events;  in bitmap_endwrite()
1809 static bool bitmap_start_sync(struct mddev *mddev, sector_t offset,  in bitmap_start_sync()  argument
1824 		rv |= __bitmap_start_sync(mddev->bitmap, offset,  in bitmap_start_sync()
1864 static void bitmap_end_sync(struct mddev *mddev, sector_t offset,  in bitmap_end_sync()  argument
1867 	__bitmap_end_sync(mddev->bitmap, offset, blocks, true);  in bitmap_end_sync()
1870 static void bitmap_close_sync(struct mddev *mddev)  in bitmap_close_sync()  argument
1878 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_close_sync()
1883 	while (sector < bitmap->mddev->resync_max_sectors) {  in bitmap_close_sync()
1889 static void bitmap_cond_end_sync(struct mddev *mddev, sector_t sector,  in bitmap_cond_end_sync()  argument
1894 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_cond_end_sync()
1903 				  + bitmap->mddev->bitmap_info.daemon_sleep)))  in bitmap_cond_end_sync()
1905 	wait_event(bitmap->mddev->recovery_wait,  in bitmap_cond_end_sync()
1906 		   atomic_read(&bitmap->mddev->recovery_active) == 0);  in bitmap_cond_end_sync()
1908 	bitmap->mddev->curr_resync_completed = sector;  in bitmap_cond_end_sync()
1909 	set_bit(MD_SB_CHANGE_CLEAN, &bitmap->mddev->sb_flags);  in bitmap_cond_end_sync()
1912 	while (s < sector && s < bitmap->mddev->resync_max_sectors) {  in bitmap_cond_end_sync()
1917 	sysfs_notify_dirent_safe(bitmap->mddev->sysfs_completed);  in bitmap_cond_end_sync()
1920 static void bitmap_sync_with_cluster(struct mddev *mddev,  in bitmap_sync_with_cluster()  argument
1924 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_sync_with_cluster()
1934 		bitmap_start_sync(mddev, sector, &blocks, false);  in bitmap_sync_with_cluster()
1967 static void bitmap_dirty_bits(struct mddev *mddev, unsigned long s,  in bitmap_dirty_bits()  argument
1971 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_dirty_bits()
1981 		if (sec < bitmap->mddev->recovery_cp)  in bitmap_dirty_bits()
1986 			bitmap->mddev->recovery_cp = sec;  in bitmap_dirty_bits()
1990 static void bitmap_flush(struct mddev *mddev)  in bitmap_flush()  argument
1992 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_flush()
2001 	sleep = mddev->bitmap_info.daemon_sleep * 2;  in bitmap_flush()
2003 	bitmap_daemon_work(mddev);  in bitmap_flush()
2005 	bitmap_daemon_work(mddev);  in bitmap_flush()
2007 	bitmap_daemon_work(mddev);  in bitmap_flush()
2008 	if (mddev->bitmap_info.external)  in bitmap_flush()
2009 		md_super_wait(mddev);  in bitmap_flush()
2025 	if (mddev_is_clustered(bitmap->mddev) && bitmap->mddev->cluster_info &&  in md_bitmap_free()
2026 		bitmap->cluster_slot == bitmap->mddev->cluster_ops->slot_number(bitmap->mddev))  in md_bitmap_free()
2027 		md_cluster_stop(bitmap->mddev);  in md_bitmap_free()
2049 static void bitmap_start_behind_write(struct mddev *mddev)  in bitmap_start_behind_write()  argument
2051 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_start_behind_write()
2063 		 bw, bitmap->mddev->bitmap_info.max_write_behind);  in bitmap_start_behind_write()
2066 static void bitmap_end_behind_write(struct mddev *mddev)  in bitmap_end_behind_write()  argument
2068 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_end_behind_write()
2077 		 bitmap->mddev->bitmap_info.max_write_behind);  in bitmap_end_behind_write()
2080 static void bitmap_wait_behind_writes(struct mddev *mddev)  in bitmap_wait_behind_writes()  argument
2082 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_wait_behind_writes()
2087 			 mdname(mddev));  in bitmap_wait_behind_writes()
2094 static void bitmap_destroy(struct mddev *mddev)  in bitmap_destroy()  argument
2096 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_destroy()
2101 	bitmap_wait_behind_writes(mddev);  in bitmap_destroy()
2102 	if (!mddev->serialize_policy)  in bitmap_destroy()
2103 		mddev_destroy_serial_pool(mddev, NULL);  in bitmap_destroy()
2105 	mutex_lock(&mddev->bitmap_info.mutex);  in bitmap_destroy()
2106 	spin_lock(&mddev->lock);  in bitmap_destroy()
2107 	mddev->bitmap = NULL; /* disconnect from the md device */  in bitmap_destroy()
2108 	spin_unlock(&mddev->lock);  in bitmap_destroy()
2109 	mutex_unlock(&mddev->bitmap_info.mutex);  in bitmap_destroy()
2110 	mddev_set_timeout(mddev, MAX_SCHEDULE_TIMEOUT, true);  in bitmap_destroy()
2120 static struct bitmap *__bitmap_create(struct mddev *mddev, int slot)  in __bitmap_create()  argument
2123 	sector_t blocks = mddev->resync_max_sectors;  in __bitmap_create()
2124 	struct file *file = mddev->bitmap_info.file;  in __bitmap_create()
2130 	BUG_ON(file && mddev->bitmap_info.offset);  in __bitmap_create()
2132 	if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) {  in __bitmap_create()
2134 			  mdname(mddev));  in __bitmap_create()
2148 	bitmap->mddev = mddev;  in __bitmap_create()
2151 	if (mddev->kobj.sd)  in __bitmap_create()
2152 		bm = sysfs_get_dirent(mddev->kobj.sd, "bitmap");  in __bitmap_create()
2169 	if (!mddev->bitmap_info.external) {  in __bitmap_create()
2174 		if (test_and_clear_bit(MD_ARRAY_FIRST_USE, &mddev->flags))  in __bitmap_create()
2180 		if (mddev->bitmap_info.chunksize == 0 ||  in __bitmap_create()
2181 		    mddev->bitmap_info.daemon_sleep == 0)  in __bitmap_create()
2190 	err = __bitmap_resize(bitmap, blocks, mddev->bitmap_info.chunksize,  in __bitmap_create()
2208 static int bitmap_create(struct mddev *mddev, int slot)  in bitmap_create()  argument
2210 	struct bitmap *bitmap = __bitmap_create(mddev, slot);  in bitmap_create()
2215 	mddev->bitmap = bitmap;  in bitmap_create()
2219 static int bitmap_load(struct mddev *mddev)  in bitmap_load()  argument
2224 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_load()
2230 	rdev_for_each(rdev, mddev)  in bitmap_load()
2231 		mddev_create_serial_pool(mddev, rdev);  in bitmap_load()
2233 	if (mddev_is_clustered(mddev))  in bitmap_load()
2234 		mddev->cluster_ops->load_bitmaps(mddev, mddev->bitmap_info.nodes);  in bitmap_load()
2241 	while (sector < mddev->resync_max_sectors) {  in bitmap_load()
2243 		bitmap_start_sync(mddev, sector, &blocks, false);  in bitmap_load()
2246 	bitmap_close_sync(mddev);  in bitmap_load()
2248 	if (mddev->degraded == 0  in bitmap_load()
2249 	    || bitmap->events_cleared == mddev->events)  in bitmap_load()
2252 		start = mddev->recovery_cp;  in bitmap_load()
2254 	mutex_lock(&mddev->bitmap_info.mutex);  in bitmap_load()
2256 	mutex_unlock(&mddev->bitmap_info.mutex);  in bitmap_load()
2263 	set_bit(MD_RECOVERY_NEEDED, &bitmap->mddev->recovery);  in bitmap_load()
2265 	mddev_set_timeout(mddev, mddev->bitmap_info.daemon_sleep, true);  in bitmap_load()
2266 	md_wakeup_thread(mddev->thread);  in bitmap_load()
2277 static void *bitmap_get_from_slot(struct mddev *mddev, int slot)  in bitmap_get_from_slot()  argument
2282 	bitmap = __bitmap_create(mddev, slot);  in bitmap_get_from_slot()
2300 static int bitmap_copy_from_slot(struct mddev *mddev, int slot, sector_t *low,  in bitmap_copy_from_slot()  argument
2308 	bitmap = bitmap_get_from_slot(mddev, slot);  in bitmap_copy_from_slot()
2322 			md_bitmap_set_memory_bits(mddev->bitmap, block, 1);  in bitmap_copy_from_slot()
2323 			md_bitmap_file_set_bit(mddev->bitmap, block);  in bitmap_copy_from_slot()
2336 	__bitmap_unplug(mddev->bitmap);  in bitmap_copy_from_slot()
2360 	if (!bitmap->mddev->bitmap_info.external &&  in bitmap_get_stats()
2414 		long space = bitmap->mddev->bitmap_info.space;  in __bitmap_resize()
2421 			if (!bitmap->mddev->bitmap_info.external)  in __bitmap_resize()
2424 			bitmap->mddev->bitmap_info.space = space;  in __bitmap_resize()
2433 			if (!bitmap->mddev->bitmap_info.external)  in __bitmap_resize()
2442 	if (bitmap->mddev->bitmap_info.offset || bitmap->mddev->bitmap_info.file)  in __bitmap_resize()
2444 					      !bitmap->mddev->bitmap_info.external,  in __bitmap_resize()
2445 					      mddev_is_clustered(bitmap->mddev)  in __bitmap_resize()
2462 		bitmap->mddev->pers->quiesce(bitmap->mddev, 1);  in __bitmap_resize()
2481 	bitmap->mddev->bitmap_info.chunksize = 1UL << (chunkshift +  in __bitmap_resize()
2488 	if (mddev_is_clustered(bitmap->mddev)) {  in __bitmap_resize()
2507 				bitmap->mddev->bitmap_info.chunksize =  in __bitmap_resize()
2581 		bitmap->mddev->pers->quiesce(bitmap->mddev, 0);  in __bitmap_resize()
2588 static int bitmap_resize(struct mddev *mddev, sector_t blocks, int chunksize,  in bitmap_resize()  argument
2591 	struct bitmap *bitmap = mddev->bitmap;  in bitmap_resize()
2600 location_show(struct mddev *mddev, char *page)  in location_show()  argument
2603 	if (mddev->bitmap_info.file)  in location_show()
2605 	else if (mddev->bitmap_info.offset)  in location_show()
2606 		len = sprintf(page, "%+lld", (long long)mddev->bitmap_info.offset);  in location_show()
2614 location_store(struct mddev *mddev, const char *buf, size_t len)  in location_store()  argument
2618 	rv = mddev_suspend_and_lock(mddev);  in location_store()
2622 	if (mddev->pers) {  in location_store()
2623 		if (mddev->recovery || mddev->sync_thread) {  in location_store()
2629 	if (mddev->bitmap || mddev->bitmap_info.file ||  in location_store()
2630 	    mddev->bitmap_info.offset) {  in location_store()
2637 		bitmap_destroy(mddev);  in location_store()
2638 		mddev->bitmap_info.offset = 0;  in location_store()
2639 		if (mddev->bitmap_info.file) {  in location_store()
2640 			struct file *f = mddev->bitmap_info.file;  in location_store()
2641 			mddev->bitmap_info.file = NULL;  in location_store()
2665 			if (mddev->bitmap_info.external == 0 &&  in location_store()
2666 			    mddev->major_version == 0 &&  in location_store()
2667 			    offset != mddev->bitmap_info.default_offset) {  in location_store()
2672 			mddev->bitmap_info.offset = offset;  in location_store()
2673 			rv = bitmap_create(mddev, -1);  in location_store()
2677 			rv = bitmap_load(mddev);  in location_store()
2679 				mddev->bitmap_info.offset = 0;  in location_store()
2680 				bitmap_destroy(mddev);  in location_store()
2685 	if (!mddev->external) {  in location_store()
2689 		set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);  in location_store()
2690 		md_wakeup_thread(mddev->thread);  in location_store()
2694 	mddev_unlock_and_resume(mddev);  in location_store()
2708 space_show(struct mddev *mddev, char *page)  in space_show()  argument
2710 	return sprintf(page, "%lu\n", mddev->bitmap_info.space);  in space_show()
2714 space_store(struct mddev *mddev, const char *buf, size_t len)  in space_store()  argument
2727 	bitmap = mddev->bitmap;  in space_store()
2734 	mddev->bitmap_info.space = sectors;  in space_store()
2742 timeout_show(struct mddev *mddev, char *page)  in timeout_show()  argument
2745 	unsigned long secs = mddev->bitmap_info.daemon_sleep / HZ;  in timeout_show()
2746 	unsigned long jifs = mddev->bitmap_info.daemon_sleep % HZ;  in timeout_show()
2756 timeout_store(struct mddev *mddev, const char *buf, size_t len)  in timeout_store()  argument
2775 	mddev->bitmap_info.daemon_sleep = timeout;  in timeout_store()
2776 	mddev_set_timeout(mddev, timeout, false);  in timeout_store()
2777 	md_wakeup_thread(mddev->thread);  in timeout_store()
2786 backlog_show(struct mddev *mddev, char *page)  in backlog_show()  argument
2788 	return sprintf(page, "%lu\n", mddev->bitmap_info.max_write_behind);  in backlog_show()
2792 backlog_store(struct mddev *mddev, const char *buf, size_t len)  in backlog_store()  argument
2795 	unsigned long old_mwb = mddev->bitmap_info.max_write_behind;  in backlog_store()
2804 	rv = mddev_suspend_and_lock(mddev);  in backlog_store()
2812 	rdev_for_each(rdev, mddev) {  in backlog_store()
2820 				    mdname(mddev));  in backlog_store()
2821 		mddev_unlock(mddev);  in backlog_store()
2825 	mddev->bitmap_info.max_write_behind = backlog;  in backlog_store()
2826 	if (!backlog && mddev->serial_info_pool) {  in backlog_store()
2828 		if (!mddev->serialize_policy)  in backlog_store()
2829 			mddev_destroy_serial_pool(mddev, NULL);  in backlog_store()
2830 	} else if (backlog && !mddev->serial_info_pool) {  in backlog_store()
2832 		rdev_for_each(rdev, mddev)  in backlog_store()
2833 			mddev_create_serial_pool(mddev, rdev);  in backlog_store()
2836 		bitmap_update_sb(mddev->bitmap);  in backlog_store()
2838 	mddev_unlock_and_resume(mddev);  in backlog_store()
2846 chunksize_show(struct mddev *mddev, char *page)  in chunksize_show()  argument
2848 	return sprintf(page, "%lu\n", mddev->bitmap_info.chunksize);  in chunksize_show()
2852 chunksize_store(struct mddev *mddev, const char *buf, size_t len)  in chunksize_store()  argument
2857 	if (mddev->bitmap)  in chunksize_store()
2868 	mddev->bitmap_info.chunksize = csize;  in chunksize_store()
2875 static ssize_t metadata_show(struct mddev *mddev, char *page)  in metadata_show()  argument
2877 	if (mddev_is_clustered(mddev))  in metadata_show()
2879 	return sprintf(page, "%s\n", (mddev->bitmap_info.external  in metadata_show()
2883 static ssize_t metadata_store(struct mddev *mddev, const char *buf, size_t len)  in metadata_store()  argument
2885 	if (mddev->bitmap ||  in metadata_store()
2886 	    mddev->bitmap_info.file ||  in metadata_store()
2887 	    mddev->bitmap_info.offset)  in metadata_store()
2890 		mddev->bitmap_info.external = 1;  in metadata_store()
2893 		mddev->bitmap_info.external = 0;  in metadata_store()
2902 static ssize_t can_clear_show(struct mddev *mddev, char *page)  in can_clear_show()  argument
2907 	spin_lock(&mddev->lock);  in can_clear_show()
2908 	bitmap = mddev->bitmap;  in can_clear_show()
2914 	spin_unlock(&mddev->lock);  in can_clear_show()
2918 static ssize_t can_clear_store(struct mddev *mddev, const char *buf, size_t len)  in can_clear_store()  argument
2920 	struct bitmap *bitmap = mddev->bitmap;  in can_clear_store()
2931 		if (mddev->degraded)  in can_clear_store()
2944 behind_writes_used_show(struct mddev *mddev, char *page)  in behind_writes_used_show()  argument
2949 	spin_lock(&mddev->lock);  in behind_writes_used_show()
2950 	bitmap = mddev->bitmap;  in behind_writes_used_show()
2955 	spin_unlock(&mddev->lock);  in behind_writes_used_show()
2961 behind_writes_used_reset(struct mddev *mddev, const char *buf, size_t len)  in behind_writes_used_reset()  argument
2963 	struct bitmap *bitmap = mddev->bitmap;  in behind_writes_used_reset()
3023 void mddev_set_bitmap_ops(struct mddev *mddev)  in mddev_set_bitmap_ops()  argument
3025 	mddev->bitmap_ops = &bitmap_ops;  in mddev_set_bitmap_ops()