250 static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
280 static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
287 			      struct btrfs_fs_info *fs_info,
303 static void __scrub_blocked_if_needed(struct btrfs_fs_info *fs_info);
304 static void scrub_blocked_if_needed(struct btrfs_fs_info *fs_info);
321 static void __scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)  in __scrub_blocked_if_needed()  argument
323 	while (atomic_read(&fs_info->scrub_pause_req)) {  in __scrub_blocked_if_needed()
324 		mutex_unlock(&fs_info->scrub_lock);  in __scrub_blocked_if_needed()
325 		wait_event(fs_info->scrub_pause_wait,  in __scrub_blocked_if_needed()
326 		   atomic_read(&fs_info->scrub_pause_req) == 0);  in __scrub_blocked_if_needed()
327 		mutex_lock(&fs_info->scrub_lock);  in __scrub_blocked_if_needed()
331 static void scrub_pause_on(struct btrfs_fs_info *fs_info)  in scrub_pause_on()  argument
333 	atomic_inc(&fs_info->scrubs_paused);  in scrub_pause_on()
334 	wake_up(&fs_info->scrub_pause_wait);  in scrub_pause_on()
337 static void scrub_pause_off(struct btrfs_fs_info *fs_info)  in scrub_pause_off()  argument
339 	mutex_lock(&fs_info->scrub_lock);  in scrub_pause_off()
340 	__scrub_blocked_if_needed(fs_info);  in scrub_pause_off()
341 	atomic_dec(&fs_info->scrubs_paused);  in scrub_pause_off()
342 	mutex_unlock(&fs_info->scrub_lock);  in scrub_pause_off()
344 	wake_up(&fs_info->scrub_pause_wait);  in scrub_pause_off()
347 static void scrub_blocked_if_needed(struct btrfs_fs_info *fs_info)  in scrub_blocked_if_needed()  argument
349 	scrub_pause_on(fs_info);  in scrub_blocked_if_needed()
350 	scrub_pause_off(fs_info);  in scrub_blocked_if_needed()
359 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_pending_trans_workers_inc()  local
371 	mutex_lock(&fs_info->scrub_lock);  in scrub_pending_trans_workers_inc()
372 	atomic_inc(&fs_info->scrubs_running);  in scrub_pending_trans_workers_inc()
373 	atomic_inc(&fs_info->scrubs_paused);  in scrub_pending_trans_workers_inc()
374 	mutex_unlock(&fs_info->scrub_lock);  in scrub_pending_trans_workers_inc()
383 	wake_up(&fs_info->scrub_pause_wait);  in scrub_pending_trans_workers_inc()
391 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_pending_trans_workers_dec()  local
397 	mutex_lock(&fs_info->scrub_lock);  in scrub_pending_trans_workers_dec()
398 	atomic_dec(&fs_info->scrubs_running);  in scrub_pending_trans_workers_dec()
399 	atomic_dec(&fs_info->scrubs_paused);  in scrub_pending_trans_workers_dec()
400 	mutex_unlock(&fs_info->scrub_lock);  in scrub_pending_trans_workers_dec()
402 	wake_up(&fs_info->scrub_pause_wait);  in scrub_pending_trans_workers_dec()
461 	struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;  in scrub_setup_ctx()  local
497 	sctx->csum_size = btrfs_super_csum_size(fs_info->super_copy);  in scrub_setup_ctx()
504 	ret = scrub_setup_wr_ctx(sctx, &sctx->wr_ctx, fs_info,  in scrub_setup_ctx()
505 				 fs_info->dev_replace.tgtdev, is_dev_replace);  in scrub_setup_ctx()
527 	struct btrfs_fs_info *fs_info = swarn->dev->dev_root->fs_info;  in scrub_print_warning_inode()  local
536 	local_root = btrfs_read_fs_root_no_name(fs_info, &root_key);  in scrub_print_warning_inode()
578 		btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "  in scrub_print_warning_inode()
590 	btrfs_warn_in_rcu(fs_info, "%s at logical %llu on dev "  in scrub_print_warning_inode()
603 	struct btrfs_fs_info *fs_info;  in scrub_print_warning()  local
619 	fs_info = sblock->sctx->dev_root->fs_info;  in scrub_print_warning()
630 	ret = extent_from_logical(fs_info, swarn.logical, path, &found_key,  in scrub_print_warning()
647 			btrfs_warn_in_rcu(fs_info,  in scrub_print_warning()
662 		iterate_extent_inodes(fs_info, found_key.objectid,  in scrub_print_warning()
680 	struct btrfs_fs_info *fs_info;  in scrub_fixup_readpage()  local
689 	fs_info = fixup->root->fs_info;  in scrub_fixup_readpage()
690 	srcu_index = srcu_read_lock(&fs_info->subvol_srcu);  in scrub_fixup_readpage()
692 	local_root = btrfs_read_fs_root_no_name(fs_info, &key);  in scrub_fixup_readpage()
694 		srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in scrub_fixup_readpage()
701 	inode = btrfs_iget(fs_info->sb, &key, local_root, NULL);  in scrub_fixup_readpage()
702 	srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in scrub_fixup_readpage()
825 	ret = iterate_inodes_from_logical(fixup->logical, fixup->root->fs_info,  in scrub_fixup_nodatasum()
846 			&sctx->dev_root->fs_info->dev_replace.  in scrub_fixup_nodatasum()
848 		btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,  in scrub_fixup_nodatasum()
884 	struct btrfs_fs_info *fs_info;  in scrub_handle_errored_block()  local
900 	fs_info = sctx->dev_root->fs_info;  in scrub_handle_errored_block()
981 	scrub_recheck_block(fs_info, sblock_bad, 1);  in scrub_handle_errored_block()
1058 		fixup_nodatasum->root = fs_info->extent_root;  in scrub_handle_errored_block()
1063 		btrfs_queue_work(fs_info->scrub_workers,  in scrub_handle_errored_block()
1094 		scrub_recheck_block(fs_info, sblock_other, 0);  in scrub_handle_errored_block()
1180 					fs_info->dev_replace.  in scrub_handle_errored_block()
1206 			scrub_recheck_block(fs_info, sblock_bad, 1);  in scrub_handle_errored_block()
1219 			btrfs_err_rl_in_rcu(fs_info,  in scrub_handle_errored_block()
1228 		btrfs_err_rl_in_rcu(fs_info,  in scrub_handle_errored_block()
1304 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_setup_recheck_block()  local
1336 		ret = btrfs_map_sblock(fs_info, REQ_GET_READ_MIRRORS, logical,  in scrub_setup_recheck_block()
1441 static int scrub_submit_raid56_bio_wait(struct btrfs_fs_info *fs_info,  in scrub_submit_raid56_bio_wait()  argument
1454 	ret = raid56_parity_recover(fs_info->fs_root, bio, page->recover->bbio,  in scrub_submit_raid56_bio_wait()
1474 static void scrub_recheck_block(struct btrfs_fs_info *fs_info,  in scrub_recheck_block()  argument
1503 			if (scrub_submit_raid56_bio_wait(fs_info, bio, page))  in scrub_recheck_block()
1577 			btrfs_warn_rl(sblock_bad->sctx->dev_root->fs_info,  in scrub_repair_page_from_good_copy()
1599 				&sblock_bad->sctx->dev_root->fs_info->  in scrub_repair_page_from_good_copy()
1627 				&sblock->sctx->dev_root->fs_info->dev_replace.  in scrub_write_block_to_dev_replace()
1741 	struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;  in scrub_wr_bio_end_io()  local
1748 	btrfs_queue_work(fs_info->scrub_wr_completion_workers, &sbio->work);  in scrub_wr_bio_end_io()
1760 			&sbio->sctx->dev_root->fs_info->dev_replace;  in scrub_wr_bio_end_io_worker()
1861 	struct btrfs_fs_info *fs_info = root->fs_info;  in scrub_checksum_tree_block()  local
1894 	if (memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,  in scrub_checksum_tree_block()
2125 	struct btrfs_fs_info *fs_info = sblock->sctx->dev_root->fs_info;  in scrub_missing_raid56_end_io()  local
2130 	btrfs_queue_work(fs_info->scrub_workers, &sblock->work);  in scrub_missing_raid56_end_io()
2150 		btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,  in scrub_missing_raid56_worker()
2157 		btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,  in scrub_missing_raid56_worker()
2179 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_missing_raid56_pages()  local
2188 	ret = btrfs_map_sblock(fs_info, REQ_GET_READ_MIRRORS, logical, &length,  in scrub_missing_raid56_pages()
2331 	struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;  in scrub_bio_end_io()  local
2336 	btrfs_queue_work(fs_info->scrub_workers, &sbio->work);  in scrub_bio_end_io()
2756 	btrfs_queue_work(sparity->sctx->dev_root->fs_info->scrub_parity_workers,  in scrub_parity_bio_endio()
2775 	ret = btrfs_map_sblock(sctx->dev_root->fs_info, WRITE,  in scrub_parity_check_and_repair()
2841 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_raid56_parity()  local
2842 	struct btrfs_root *root = fs_info->extent_root;  in scrub_raid56_parity()
2843 	struct btrfs_root *csum_root = fs_info->csum_root;  in scrub_raid56_parity()
2887 		if (btrfs_fs_incompat(fs_info, SKINNY_METADATA))  in scrub_raid56_parity()
2958 				btrfs_err(fs_info, "scrub: tree block %llu spanning stripes, ignored. logical=%llu",  in scrub_raid56_parity()
2983 			ret = btrfs_map_block(fs_info, READ, extent_logical,  in scrub_raid56_parity()
3063 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_stripe()  local
3064 	struct btrfs_root *root = fs_info->extent_root;  in scrub_stripe()
3065 	struct btrfs_root *csum_root = fs_info->csum_root;  in scrub_stripe()
3158 	scrub_blocked_if_needed(fs_info);  in scrub_stripe()
3197 		if (atomic_read(&fs_info->scrub_cancel_req) ||  in scrub_stripe()
3205 		if (atomic_read(&fs_info->scrub_pause_req)) {  in scrub_stripe()
3215 			scrub_blocked_if_needed(fs_info);  in scrub_stripe()
3236 		if (btrfs_fs_incompat(fs_info, SKINNY_METADATA))  in scrub_stripe()
3308 				btrfs_err(fs_info,  in scrub_stripe()
3339 				scrub_remap_extent(fs_info, extent_logical,  in scrub_stripe()
3440 		&sctx->dev_root->fs_info->mapping_tree;  in scrub_chunk()
3494 	struct btrfs_fs_info *fs_info = root->fs_info;  in scrub_enumerate_chunks()  local
3504 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in scrub_enumerate_chunks()
3566 		cache = btrfs_lookup_block_group(fs_info, chunk_offset);  in scrub_enumerate_chunks()
3581 		scrub_pause_on(fs_info);  in scrub_enumerate_chunks()
3583 		scrub_pause_off(fs_info);  in scrub_enumerate_chunks()
3597 			btrfs_warn(fs_info, "failed setting block group ro, ret=%d\n",  in scrub_enumerate_chunks()
3628 		scrub_pause_on(fs_info);  in scrub_enumerate_chunks()
3639 		scrub_pause_off(fs_info);  in scrub_enumerate_chunks()
3655 			spin_lock(&fs_info->unused_bgs_lock);  in scrub_enumerate_chunks()
3659 					      &fs_info->unused_bgs);  in scrub_enumerate_chunks()
3661 			spin_unlock(&fs_info->unused_bgs_lock);  in scrub_enumerate_chunks()
3700 	if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))  in scrub_supers()
3704 	if (scrub_dev->fs_devices != root->fs_info->fs_devices)  in scrub_supers()
3707 		gen = root->fs_info->last_trans_committed;  in scrub_supers()
3729 static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,  in scrub_workers_get()  argument
3733 	int max_active = fs_info->thread_pool_size;  in scrub_workers_get()
3735 	if (fs_info->scrub_workers_refcnt == 0) {  in scrub_workers_get()
3737 			fs_info->scrub_workers =  in scrub_workers_get()
3741 			fs_info->scrub_workers =  in scrub_workers_get()
3744 		if (!fs_info->scrub_workers)  in scrub_workers_get()
3747 		fs_info->scrub_wr_completion_workers =  in scrub_workers_get()
3750 		if (!fs_info->scrub_wr_completion_workers)  in scrub_workers_get()
3753 		fs_info->scrub_nocow_workers =  in scrub_workers_get()
3755 		if (!fs_info->scrub_nocow_workers)  in scrub_workers_get()
3757 		fs_info->scrub_parity_workers =  in scrub_workers_get()
3760 		if (!fs_info->scrub_parity_workers)  in scrub_workers_get()
3763 	++fs_info->scrub_workers_refcnt;  in scrub_workers_get()
3767 	btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);  in scrub_workers_get()
3769 	btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);  in scrub_workers_get()
3771 	btrfs_destroy_workqueue(fs_info->scrub_workers);  in scrub_workers_get()
3776 static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)  in scrub_workers_put()  argument
3778 	if (--fs_info->scrub_workers_refcnt == 0) {  in scrub_workers_put()
3779 		btrfs_destroy_workqueue(fs_info->scrub_workers);  in scrub_workers_put()
3780 		btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);  in scrub_workers_put()
3781 		btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);  in scrub_workers_put()
3782 		btrfs_destroy_workqueue(fs_info->scrub_parity_workers);  in scrub_workers_put()
3784 	WARN_ON(fs_info->scrub_workers_refcnt < 0);  in scrub_workers_put()
3787 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,  in btrfs_scrub_dev()  argument
3796 	if (btrfs_fs_closing(fs_info))  in btrfs_scrub_dev()
3799 	if (fs_info->chunk_root->nodesize > BTRFS_STRIPE_LEN) {  in btrfs_scrub_dev()
3805 		btrfs_err(fs_info,  in btrfs_scrub_dev()
3807 		       fs_info->chunk_root->nodesize, BTRFS_STRIPE_LEN);  in btrfs_scrub_dev()
3811 	if (fs_info->chunk_root->sectorsize != PAGE_SIZE) {  in btrfs_scrub_dev()
3813 		btrfs_err(fs_info,  in btrfs_scrub_dev()
3816 		       fs_info->chunk_root->sectorsize, PAGE_SIZE);  in btrfs_scrub_dev()
3820 	if (fs_info->chunk_root->nodesize >  in btrfs_scrub_dev()
3822 	    fs_info->chunk_root->sectorsize >  in btrfs_scrub_dev()
3828 		btrfs_err(fs_info, "scrub: size assumption nodesize and sectorsize "  in btrfs_scrub_dev()
3830 		       fs_info->chunk_root->nodesize,  in btrfs_scrub_dev()
3832 		       fs_info->chunk_root->sectorsize,  in btrfs_scrub_dev()
3838 	mutex_lock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3839 	dev = btrfs_find_device(fs_info, devid, NULL, NULL);  in btrfs_scrub_dev()
3841 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3846 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3849 		btrfs_err(fs_info, "scrub: device %s is not writable",  in btrfs_scrub_dev()
3855 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3857 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3858 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3862 	btrfs_dev_replace_lock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3865 	     btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) {  in btrfs_scrub_dev()
3866 		btrfs_dev_replace_unlock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3867 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3868 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3871 	btrfs_dev_replace_unlock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3873 	ret = scrub_workers_get(fs_info, is_dev_replace);  in btrfs_scrub_dev()
3875 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3876 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3882 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3883 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3884 		scrub_workers_put(fs_info);  in btrfs_scrub_dev()
3889 	mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3895 	__scrub_blocked_if_needed(fs_info);  in btrfs_scrub_dev()
3896 	atomic_inc(&fs_info->scrubs_running);  in btrfs_scrub_dev()
3897 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3904 		mutex_lock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3906 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3914 	atomic_dec(&fs_info->scrubs_running);  in btrfs_scrub_dev()
3915 	wake_up(&fs_info->scrub_pause_wait);  in btrfs_scrub_dev()
3922 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3924 	scrub_workers_put(fs_info);  in btrfs_scrub_dev()
3925 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3934 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_scrub_pause()  local
3936 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3937 	atomic_inc(&fs_info->scrub_pause_req);  in btrfs_scrub_pause()
3938 	while (atomic_read(&fs_info->scrubs_paused) !=  in btrfs_scrub_pause()
3939 	       atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_pause()
3940 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3941 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_pause()
3942 			   atomic_read(&fs_info->scrubs_paused) ==  in btrfs_scrub_pause()
3943 			   atomic_read(&fs_info->scrubs_running));  in btrfs_scrub_pause()
3944 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3946 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3951 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_scrub_continue()  local
3953 	atomic_dec(&fs_info->scrub_pause_req);  in btrfs_scrub_continue()
3954 	wake_up(&fs_info->scrub_pause_wait);  in btrfs_scrub_continue()
3957 int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)  in btrfs_scrub_cancel()  argument
3959 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3960 	if (!atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_cancel()
3961 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3965 	atomic_inc(&fs_info->scrub_cancel_req);  in btrfs_scrub_cancel()
3966 	while (atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_cancel()
3967 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3968 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_cancel()
3969 			   atomic_read(&fs_info->scrubs_running) == 0);  in btrfs_scrub_cancel()
3970 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3972 	atomic_dec(&fs_info->scrub_cancel_req);  in btrfs_scrub_cancel()
3973 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3978 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info,  in btrfs_scrub_cancel_dev()  argument
3983 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3986 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3991 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3992 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_cancel_dev()
3994 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3996 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
4007 	mutex_lock(&root->fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_progress()
4008 	dev = btrfs_find_device(root->fs_info, devid, NULL, NULL);  in btrfs_scrub_progress()
4013 	mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_progress()
4018 static void scrub_remap_extent(struct btrfs_fs_info *fs_info,  in scrub_remap_extent()  argument
4029 	ret = btrfs_map_block(fs_info, READ, extent_logical,  in scrub_remap_extent()
4045 			      struct btrfs_fs_info *fs_info,  in scrub_setup_wr_ctx()  argument
4075 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in copy_nocow_pages()  local
4095 	btrfs_queue_work(fs_info->scrub_nocow_workers,  in copy_nocow_pages()
4129 	struct btrfs_fs_info *fs_info;  in copy_nocow_pages_worker()  local
4134 	fs_info = sctx->dev_root->fs_info;  in copy_nocow_pages_worker()
4135 	root = fs_info->extent_root;  in copy_nocow_pages_worker()
4152 	ret = iterate_inodes_from_logical(logical, fs_info, path,  in copy_nocow_pages_worker()
4155 		btrfs_warn(fs_info, "iterate_inodes_from_logical() failed: log %llu, "  in copy_nocow_pages_worker()
4193 		btrfs_dev_replace_stats_inc(&fs_info->dev_replace.  in copy_nocow_pages_worker()
4249 	struct btrfs_fs_info *fs_info = nocow_ctx->sctx->dev_root->fs_info;  in copy_nocow_pages_for_inode()  local
4267 	srcu_index = srcu_read_lock(&fs_info->subvol_srcu);  in copy_nocow_pages_for_inode()
4269 	local_root = btrfs_read_fs_root_no_name(fs_info, &key);  in copy_nocow_pages_for_inode()
4271 		srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in copy_nocow_pages_for_inode()
4278 	inode = btrfs_iget(fs_info->sb, &key, local_root, NULL);  in copy_nocow_pages_for_inode()
4279 	srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in copy_nocow_pages_for_inode()
4302 			btrfs_err(fs_info, "find_or_create_page() failed");  in copy_nocow_pages_for_inode()
4379 		btrfs_warn_rl(dev->dev_root->fs_info,  in write_page_nocow()