75 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_init_dev_replace()  local
110 		dev_replace->replace_state =  in btrfs_init_dev_replace()
112 		dev_replace->cont_reading_from_srcdev_mode =  in btrfs_init_dev_replace()
114 		dev_replace->time_started = 0;  in btrfs_init_dev_replace()
115 		dev_replace->time_stopped = 0;  in btrfs_init_dev_replace()
116 		atomic64_set(&dev_replace->num_write_errors, 0);  in btrfs_init_dev_replace()
117 		atomic64_set(&dev_replace->num_uncorrectable_read_errors, 0);  in btrfs_init_dev_replace()
118 		dev_replace->cursor_left = 0;  in btrfs_init_dev_replace()
119 		dev_replace->committed_cursor_left = 0;  in btrfs_init_dev_replace()
120 		dev_replace->cursor_left_last_write_of_item = 0;  in btrfs_init_dev_replace()
121 		dev_replace->cursor_right = 0;  in btrfs_init_dev_replace()
122 		dev_replace->srcdev = NULL;  in btrfs_init_dev_replace()
123 		dev_replace->tgtdev = NULL;  in btrfs_init_dev_replace()
124 		dev_replace->is_valid = 0;  in btrfs_init_dev_replace()
125 		dev_replace->item_needs_writeback = 0;  in btrfs_init_dev_replace()
140 	dev_replace->cont_reading_from_srcdev_mode =  in btrfs_init_dev_replace()
142 	dev_replace->replace_state = btrfs_dev_replace_replace_state(eb, ptr);  in btrfs_init_dev_replace()
143 	dev_replace->time_started = btrfs_dev_replace_time_started(eb, ptr);  in btrfs_init_dev_replace()
144 	dev_replace->time_stopped =  in btrfs_init_dev_replace()
146 	atomic64_set(&dev_replace->num_write_errors,  in btrfs_init_dev_replace()
148 	atomic64_set(&dev_replace->num_uncorrectable_read_errors,  in btrfs_init_dev_replace()
150 	dev_replace->cursor_left = btrfs_dev_replace_cursor_left(eb, ptr);  in btrfs_init_dev_replace()
151 	dev_replace->committed_cursor_left = dev_replace->cursor_left;  in btrfs_init_dev_replace()
152 	dev_replace->cursor_left_last_write_of_item = dev_replace->cursor_left;  in btrfs_init_dev_replace()
153 	dev_replace->cursor_right = btrfs_dev_replace_cursor_right(eb, ptr);  in btrfs_init_dev_replace()
154 	dev_replace->is_valid = 1;  in btrfs_init_dev_replace()
156 	dev_replace->item_needs_writeback = 0;  in btrfs_init_dev_replace()
157 	switch (dev_replace->replace_state) {  in btrfs_init_dev_replace()
170 			dev_replace->srcdev = NULL;  in btrfs_init_dev_replace()
171 			dev_replace->tgtdev = NULL;  in btrfs_init_dev_replace()
176 		dev_replace->tgtdev = btrfs_find_device(fs_info->fs_devices, &args);  in btrfs_init_dev_replace()
178 		dev_replace->srcdev = btrfs_find_device(fs_info->fs_devices, &args);  in btrfs_init_dev_replace()
184 		if (!dev_replace->srcdev &&  in btrfs_init_dev_replace()
193 		if (!dev_replace->tgtdev &&  in btrfs_init_dev_replace()
202 		if (dev_replace->tgtdev) {  in btrfs_init_dev_replace()
203 			if (dev_replace->srcdev) {  in btrfs_init_dev_replace()
204 				dev_replace->tgtdev->total_bytes =  in btrfs_init_dev_replace()
205 					dev_replace->srcdev->total_bytes;  in btrfs_init_dev_replace()
206 				dev_replace->tgtdev->disk_total_bytes =  in btrfs_init_dev_replace()
207 					dev_replace->srcdev->disk_total_bytes;  in btrfs_init_dev_replace()
208 				dev_replace->tgtdev->commit_total_bytes =  in btrfs_init_dev_replace()
209 					dev_replace->srcdev->commit_total_bytes;  in btrfs_init_dev_replace()
210 				dev_replace->tgtdev->bytes_used =  in btrfs_init_dev_replace()
211 					dev_replace->srcdev->bytes_used;  in btrfs_init_dev_replace()
212 				dev_replace->tgtdev->commit_bytes_used =  in btrfs_init_dev_replace()
213 					dev_replace->srcdev->commit_bytes_used;  in btrfs_init_dev_replace()
216 				&dev_replace->tgtdev->dev_state);  in btrfs_init_dev_replace()
219 			dev_replace->tgtdev->io_width = fs_info->sectorsize;  in btrfs_init_dev_replace()
220 			dev_replace->tgtdev->io_align = fs_info->sectorsize;  in btrfs_init_dev_replace()
221 			dev_replace->tgtdev->sector_size = fs_info->sectorsize;  in btrfs_init_dev_replace()
222 			dev_replace->tgtdev->fs_info = fs_info;  in btrfs_init_dev_replace()
224 				&dev_replace->tgtdev->dev_state);  in btrfs_init_dev_replace()
353 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_run_dev_replace()  local
355 	down_read(&dev_replace->rwsem);  in btrfs_run_dev_replace()
356 	if (!dev_replace->is_valid ||  in btrfs_run_dev_replace()
357 	    !dev_replace->item_needs_writeback) {  in btrfs_run_dev_replace()
358 		up_read(&dev_replace->rwsem);  in btrfs_run_dev_replace()
361 	up_read(&dev_replace->rwsem);  in btrfs_run_dev_replace()
419 	down_write(&dev_replace->rwsem);  in btrfs_run_dev_replace()
420 	if (dev_replace->srcdev)  in btrfs_run_dev_replace()
422 			dev_replace->srcdev->devid);  in btrfs_run_dev_replace()
426 		dev_replace->cont_reading_from_srcdev_mode);  in btrfs_run_dev_replace()
428 		dev_replace->replace_state);  in btrfs_run_dev_replace()
429 	btrfs_set_dev_replace_time_started(eb, ptr, dev_replace->time_started);  in btrfs_run_dev_replace()
430 	btrfs_set_dev_replace_time_stopped(eb, ptr, dev_replace->time_stopped);  in btrfs_run_dev_replace()
432 		atomic64_read(&dev_replace->num_write_errors));  in btrfs_run_dev_replace()
434 		atomic64_read(&dev_replace->num_uncorrectable_read_errors));  in btrfs_run_dev_replace()
435 	dev_replace->cursor_left_last_write_of_item =  in btrfs_run_dev_replace()
436 		dev_replace->cursor_left;  in btrfs_run_dev_replace()
438 		dev_replace->cursor_left_last_write_of_item);  in btrfs_run_dev_replace()
440 		dev_replace->cursor_right);  in btrfs_run_dev_replace()
441 	dev_replace->item_needs_writeback = 0;  in btrfs_run_dev_replace()
442 	up_write(&dev_replace->rwsem);  in btrfs_run_dev_replace()
601 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_start()  local
640 	down_write(&dev_replace->rwsem);  in btrfs_dev_replace_start()
641 	dev_replace->replace_task = current;  in btrfs_dev_replace_start()
642 	switch (dev_replace->replace_state) {  in btrfs_dev_replace_start()
651 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_start()
655 	dev_replace->cont_reading_from_srcdev_mode = read_src;  in btrfs_dev_replace_start()
656 	dev_replace->srcdev = src_device;  in btrfs_dev_replace_start()
657 	dev_replace->tgtdev = tgt_device;  in btrfs_dev_replace_start()
669 	dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED;  in btrfs_dev_replace_start()
670 	dev_replace->time_started = ktime_get_real_seconds();  in btrfs_dev_replace_start()
671 	dev_replace->cursor_left = 0;  in btrfs_dev_replace_start()
672 	dev_replace->committed_cursor_left = 0;  in btrfs_dev_replace_start()
673 	dev_replace->cursor_left_last_write_of_item = 0;  in btrfs_dev_replace_start()
674 	dev_replace->cursor_right = 0;  in btrfs_dev_replace_start()
675 	dev_replace->is_valid = 1;  in btrfs_dev_replace_start()
676 	dev_replace->item_needs_writeback = 1;  in btrfs_dev_replace_start()
677 	atomic64_set(&dev_replace->num_write_errors, 0);  in btrfs_dev_replace_start()
678 	atomic64_set(&dev_replace->num_uncorrectable_read_errors, 0);  in btrfs_dev_replace_start()
679 	up_write(&dev_replace->rwsem);  in btrfs_dev_replace_start()
696 		down_write(&dev_replace->rwsem);  in btrfs_dev_replace_start()
697 		dev_replace->replace_state =  in btrfs_dev_replace_start()
699 		dev_replace->srcdev = NULL;  in btrfs_dev_replace_start()
700 		dev_replace->tgtdev = NULL;  in btrfs_dev_replace_start()
701 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_start()
711 			      &dev_replace->scrub_progress, 0, 1);  in btrfs_dev_replace_start()
776 	wait_event(fs_info->dev_replace.replace_wait, !percpu_counter_sum(  in btrfs_rm_dev_replace_blocked()
777 		   &fs_info->dev_replace.bio_counter));  in btrfs_rm_dev_replace_blocked()
786 	wake_up(&fs_info->dev_replace.replace_wait);  in btrfs_rm_dev_replace_unblocked()
870 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_finishing()  local
880 	mutex_lock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
882 	down_read(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
884 	if (dev_replace->replace_state !=  in btrfs_dev_replace_finishing()
886 		up_read(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
887 		mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
891 	tgt_device = dev_replace->tgtdev;  in btrfs_dev_replace_finishing()
892 	src_device = dev_replace->srcdev;  in btrfs_dev_replace_finishing()
893 	up_read(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
901 		mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
914 			mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
933 	down_write(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
934 	dev_replace->replace_state =  in btrfs_dev_replace_finishing()
937 	dev_replace->tgtdev = NULL;  in btrfs_dev_replace_finishing()
938 	dev_replace->srcdev = NULL;  in btrfs_dev_replace_finishing()
939 	dev_replace->time_stopped = ktime_get_real_seconds();  in btrfs_dev_replace_finishing()
940 	dev_replace->item_needs_writeback = 1;  in btrfs_dev_replace_finishing()
961 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
968 		mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
995 	dev_replace->replace_task = NULL;  in btrfs_dev_replace_finishing()
996 	up_write(&dev_replace->rwsem);  in btrfs_dev_replace_finishing()
1030 	mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_finishing()
1044 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_progress()  local
1047 	switch (dev_replace->replace_state) {  in btrfs_dev_replace_progress()
1057 		ret = div64_u64(dev_replace->cursor_left,  in btrfs_dev_replace_progress()
1059 						dev_replace->srcdev), 1000));  in btrfs_dev_replace_progress()
1069 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_status()  local
1071 	down_read(&dev_replace->rwsem);  in btrfs_dev_replace_status()
1075 	args->status.replace_state = dev_replace->replace_state;  in btrfs_dev_replace_status()
1076 	args->status.time_started = dev_replace->time_started;  in btrfs_dev_replace_status()
1077 	args->status.time_stopped = dev_replace->time_stopped;  in btrfs_dev_replace_status()
1079 		atomic64_read(&dev_replace->num_write_errors);  in btrfs_dev_replace_status()
1081 		atomic64_read(&dev_replace->num_uncorrectable_read_errors);  in btrfs_dev_replace_status()
1083 	up_read(&dev_replace->rwsem);  in btrfs_dev_replace_status()
1088 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_cancel()  local
1099 	mutex_lock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_cancel()
1100 	down_write(&dev_replace->rwsem);  in btrfs_dev_replace_cancel()
1101 	switch (dev_replace->replace_state) {  in btrfs_dev_replace_cancel()
1106 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_cancel()
1109 		tgt_device = dev_replace->tgtdev;  in btrfs_dev_replace_cancel()
1110 		src_device = dev_replace->srcdev;  in btrfs_dev_replace_cancel()
1111 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_cancel()
1133 		tgt_device = dev_replace->tgtdev;  in btrfs_dev_replace_cancel()
1134 		src_device = dev_replace->srcdev;  in btrfs_dev_replace_cancel()
1135 		dev_replace->tgtdev = NULL;  in btrfs_dev_replace_cancel()
1136 		dev_replace->srcdev = NULL;  in btrfs_dev_replace_cancel()
1137 		dev_replace->replace_state =  in btrfs_dev_replace_cancel()
1139 		dev_replace->time_stopped = ktime_get_real_seconds();  in btrfs_dev_replace_cancel()
1140 		dev_replace->item_needs_writeback = 1;  in btrfs_dev_replace_cancel()
1142 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_cancel()
1149 			mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_cancel()
1164 		up_write(&dev_replace->rwsem);  in btrfs_dev_replace_cancel()
1168 	mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_cancel()
1174 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_suspend_for_unmount()  local
1176 	mutex_lock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_suspend_for_unmount()
1177 	down_write(&dev_replace->rwsem);  in btrfs_dev_replace_suspend_for_unmount()
1179 	switch (dev_replace->replace_state) {  in btrfs_dev_replace_suspend_for_unmount()
1186 		dev_replace->replace_state =  in btrfs_dev_replace_suspend_for_unmount()
1188 		dev_replace->time_stopped = ktime_get_real_seconds();  in btrfs_dev_replace_suspend_for_unmount()
1189 		dev_replace->item_needs_writeback = 1;  in btrfs_dev_replace_suspend_for_unmount()
1194 	up_write(&dev_replace->rwsem);  in btrfs_dev_replace_suspend_for_unmount()
1195 	mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);  in btrfs_dev_replace_suspend_for_unmount()
1202 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_resume_dev_replace_async()  local
1204 	down_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1206 	switch (dev_replace->replace_state) {  in btrfs_resume_dev_replace_async()
1210 		up_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1215 		dev_replace->replace_state =  in btrfs_resume_dev_replace_async()
1219 	if (!dev_replace->tgtdev || !dev_replace->tgtdev->bdev) {  in btrfs_resume_dev_replace_async()
1224 		dev_replace->replace_state =  in btrfs_resume_dev_replace_async()
1226 		up_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1229 	up_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1237 		down_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1238 		dev_replace->replace_state =  in btrfs_resume_dev_replace_async()
1240 		up_write(&dev_replace->rwsem);  in btrfs_resume_dev_replace_async()
1253 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in btrfs_dev_replace_kthread()  local
1261 		btrfs_dev_name(dev_replace->srcdev),  in btrfs_dev_replace_kthread()
1262 		dev_replace->srcdev->devid,  in btrfs_dev_replace_kthread()
1263 		btrfs_dev_name(dev_replace->tgtdev),  in btrfs_dev_replace_kthread()
1266 	ret = btrfs_scrub_dev(fs_info, dev_replace->srcdev->devid,  in btrfs_dev_replace_kthread()
1267 			      dev_replace->committed_cursor_left,  in btrfs_dev_replace_kthread()
1268 			      btrfs_device_get_total_bytes(dev_replace->srcdev),  in btrfs_dev_replace_kthread()
1269 			      &dev_replace->scrub_progress, 0, 1);  in btrfs_dev_replace_kthread()
1277 int __pure btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace)  in btrfs_dev_replace_is_ongoing()  argument
1279 	if (!dev_replace->is_valid)  in btrfs_dev_replace_is_ongoing()
1282 	switch (dev_replace->replace_state) {  in btrfs_dev_replace_is_ongoing()
1306 	percpu_counter_sub(&fs_info->dev_replace.bio_counter, amount);  in btrfs_bio_counter_sub()
1307 	cond_wake_up_nomb(&fs_info->dev_replace.replace_wait);  in btrfs_bio_counter_sub()
1313 		percpu_counter_inc(&fs_info->dev_replace.bio_counter);  in btrfs_bio_counter_inc_blocked()
1319 		wait_event(fs_info->dev_replace.replace_wait,  in btrfs_bio_counter_inc_blocked()