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()
976 	scrub_recheck_block(fs_info, sblock_bad, 1);  in scrub_handle_errored_block()
1059 		fixup_nodatasum->root = fs_info->extent_root;  in scrub_handle_errored_block()
1064 		btrfs_queue_work(fs_info->scrub_workers,  in scrub_handle_errored_block()
1095 		scrub_recheck_block(fs_info, sblock_other, 0);  in scrub_handle_errored_block()
1181 					fs_info->dev_replace.  in scrub_handle_errored_block()
1207 			scrub_recheck_block(fs_info, sblock_bad, 1);  in scrub_handle_errored_block()
1220 			btrfs_err_rl_in_rcu(fs_info,  in scrub_handle_errored_block()
1229 		btrfs_err_rl_in_rcu(fs_info,  in scrub_handle_errored_block()
1305 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_setup_recheck_block()  local
1337 		ret = btrfs_map_sblock(fs_info, REQ_GET_READ_MIRRORS, logical,  in scrub_setup_recheck_block()
1442 static int scrub_submit_raid56_bio_wait(struct btrfs_fs_info *fs_info,  in scrub_submit_raid56_bio_wait()  argument
1455 	ret = raid56_parity_recover(fs_info->fs_root, bio, page->recover->bbio,  in scrub_submit_raid56_bio_wait()
1475 static void scrub_recheck_block(struct btrfs_fs_info *fs_info,  in scrub_recheck_block()  argument
1504 			if (scrub_submit_raid56_bio_wait(fs_info, bio, page))  in scrub_recheck_block()
1578 			btrfs_warn_rl(sblock_bad->sctx->dev_root->fs_info,  in scrub_repair_page_from_good_copy()
1600 				&sblock_bad->sctx->dev_root->fs_info->  in scrub_repair_page_from_good_copy()
1628 				&sblock->sctx->dev_root->fs_info->dev_replace.  in scrub_write_block_to_dev_replace()
1742 	struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;  in scrub_wr_bio_end_io()  local
1749 	btrfs_queue_work(fs_info->scrub_wr_completion_workers, &sbio->work);  in scrub_wr_bio_end_io()
1761 			&sbio->sctx->dev_root->fs_info->dev_replace;  in scrub_wr_bio_end_io_worker()
1862 	struct btrfs_fs_info *fs_info = root->fs_info;  in scrub_checksum_tree_block()  local
1895 	if (memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,  in scrub_checksum_tree_block()
2126 	struct btrfs_fs_info *fs_info = sblock->sctx->dev_root->fs_info;  in scrub_missing_raid56_end_io()  local
2131 	btrfs_queue_work(fs_info->scrub_workers, &sblock->work);  in scrub_missing_raid56_end_io()
2151 		btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,  in scrub_missing_raid56_worker()
2158 		btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,  in scrub_missing_raid56_worker()
2180 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_missing_raid56_pages()  local
2189 	ret = btrfs_map_sblock(fs_info, REQ_GET_READ_MIRRORS, logical, &length,  in scrub_missing_raid56_pages()
2332 	struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;  in scrub_bio_end_io()  local
2337 	btrfs_queue_work(fs_info->scrub_workers, &sbio->work);  in scrub_bio_end_io()
2757 	btrfs_queue_work(sparity->sctx->dev_root->fs_info->scrub_parity_workers,  in scrub_parity_bio_endio()
2776 	ret = btrfs_map_sblock(sctx->dev_root->fs_info, WRITE,  in scrub_parity_check_and_repair()
2842 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_raid56_parity()  local
2843 	struct btrfs_root *root = fs_info->extent_root;  in scrub_raid56_parity()
2844 	struct btrfs_root *csum_root = fs_info->csum_root;  in scrub_raid56_parity()
2888 		if (btrfs_fs_incompat(fs_info, SKINNY_METADATA))  in scrub_raid56_parity()
2959 				btrfs_err(fs_info, "scrub: tree block %llu spanning stripes, ignored. logical=%llu",  in scrub_raid56_parity()
2984 			ret = btrfs_map_block(fs_info, READ, extent_logical,  in scrub_raid56_parity()
3064 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in scrub_stripe()  local
3065 	struct btrfs_root *root = fs_info->extent_root;  in scrub_stripe()
3066 	struct btrfs_root *csum_root = fs_info->csum_root;  in scrub_stripe()
3159 	scrub_blocked_if_needed(fs_info);  in scrub_stripe()
3198 		if (atomic_read(&fs_info->scrub_cancel_req) ||  in scrub_stripe()
3206 		if (atomic_read(&fs_info->scrub_pause_req)) {  in scrub_stripe()
3216 			scrub_blocked_if_needed(fs_info);  in scrub_stripe()
3237 		if (btrfs_fs_incompat(fs_info, SKINNY_METADATA))  in scrub_stripe()
3309 				btrfs_err(fs_info,  in scrub_stripe()
3340 				scrub_remap_extent(fs_info, extent_logical,  in scrub_stripe()
3441 		&sctx->dev_root->fs_info->mapping_tree;  in scrub_chunk()
3495 	struct btrfs_fs_info *fs_info = root->fs_info;  in scrub_enumerate_chunks()  local
3505 	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;  in scrub_enumerate_chunks()
3567 		cache = btrfs_lookup_block_group(fs_info, chunk_offset);  in scrub_enumerate_chunks()
3582 		scrub_pause_on(fs_info);  in scrub_enumerate_chunks()
3584 		scrub_pause_off(fs_info);  in scrub_enumerate_chunks()
3598 			btrfs_warn(fs_info, "failed setting block group ro, ret=%d\n",  in scrub_enumerate_chunks()
3629 		scrub_pause_on(fs_info);  in scrub_enumerate_chunks()
3640 		scrub_pause_off(fs_info);  in scrub_enumerate_chunks()
3656 			spin_lock(&fs_info->unused_bgs_lock);  in scrub_enumerate_chunks()
3660 					      &fs_info->unused_bgs);  in scrub_enumerate_chunks()
3662 			spin_unlock(&fs_info->unused_bgs_lock);  in scrub_enumerate_chunks()
3701 	if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))  in scrub_supers()
3705 	if (scrub_dev->fs_devices != root->fs_info->fs_devices)  in scrub_supers()
3708 		gen = root->fs_info->last_trans_committed;  in scrub_supers()
3730 static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,  in scrub_workers_get()  argument
3734 	int max_active = fs_info->thread_pool_size;  in scrub_workers_get()
3736 	if (fs_info->scrub_workers_refcnt == 0) {  in scrub_workers_get()
3738 			fs_info->scrub_workers =  in scrub_workers_get()
3742 			fs_info->scrub_workers =  in scrub_workers_get()
3745 		if (!fs_info->scrub_workers)  in scrub_workers_get()
3748 		fs_info->scrub_wr_completion_workers =  in scrub_workers_get()
3751 		if (!fs_info->scrub_wr_completion_workers)  in scrub_workers_get()
3754 		fs_info->scrub_nocow_workers =  in scrub_workers_get()
3756 		if (!fs_info->scrub_nocow_workers)  in scrub_workers_get()
3758 		fs_info->scrub_parity_workers =  in scrub_workers_get()
3761 		if (!fs_info->scrub_parity_workers)  in scrub_workers_get()
3764 	++fs_info->scrub_workers_refcnt;  in scrub_workers_get()
3768 	btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);  in scrub_workers_get()
3770 	btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);  in scrub_workers_get()
3772 	btrfs_destroy_workqueue(fs_info->scrub_workers);  in scrub_workers_get()
3777 static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)  in scrub_workers_put()  argument
3779 	if (--fs_info->scrub_workers_refcnt == 0) {  in scrub_workers_put()
3780 		btrfs_destroy_workqueue(fs_info->scrub_workers);  in scrub_workers_put()
3781 		btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);  in scrub_workers_put()
3782 		btrfs_destroy_workqueue(fs_info->scrub_nocow_workers);  in scrub_workers_put()
3783 		btrfs_destroy_workqueue(fs_info->scrub_parity_workers);  in scrub_workers_put()
3785 	WARN_ON(fs_info->scrub_workers_refcnt < 0);  in scrub_workers_put()
3788 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,  in btrfs_scrub_dev()  argument
3797 	if (btrfs_fs_closing(fs_info))  in btrfs_scrub_dev()
3800 	if (fs_info->chunk_root->nodesize > BTRFS_STRIPE_LEN) {  in btrfs_scrub_dev()
3806 		btrfs_err(fs_info,  in btrfs_scrub_dev()
3808 		       fs_info->chunk_root->nodesize, BTRFS_STRIPE_LEN);  in btrfs_scrub_dev()
3812 	if (fs_info->chunk_root->sectorsize != PAGE_SIZE) {  in btrfs_scrub_dev()
3814 		btrfs_err(fs_info,  in btrfs_scrub_dev()
3817 		       fs_info->chunk_root->sectorsize, PAGE_SIZE);  in btrfs_scrub_dev()
3821 	if (fs_info->chunk_root->nodesize >  in btrfs_scrub_dev()
3823 	    fs_info->chunk_root->sectorsize >  in btrfs_scrub_dev()
3829 		btrfs_err(fs_info, "scrub: size assumption nodesize and sectorsize "  in btrfs_scrub_dev()
3831 		       fs_info->chunk_root->nodesize,  in btrfs_scrub_dev()
3833 		       fs_info->chunk_root->sectorsize,  in btrfs_scrub_dev()
3839 	mutex_lock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3840 	dev = btrfs_find_device(fs_info, devid, NULL, NULL);  in btrfs_scrub_dev()
3842 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3847 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3850 		btrfs_err(fs_info, "scrub: device %s is not writable",  in btrfs_scrub_dev()
3856 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3858 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3859 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3863 	btrfs_dev_replace_lock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3866 	     btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) {  in btrfs_scrub_dev()
3867 		btrfs_dev_replace_unlock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3868 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3869 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3872 	btrfs_dev_replace_unlock(&fs_info->dev_replace);  in btrfs_scrub_dev()
3874 	ret = scrub_workers_get(fs_info, is_dev_replace);  in btrfs_scrub_dev()
3876 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3877 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3883 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3884 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3885 		scrub_workers_put(fs_info);  in btrfs_scrub_dev()
3890 	mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3896 	__scrub_blocked_if_needed(fs_info);  in btrfs_scrub_dev()
3897 	atomic_inc(&fs_info->scrubs_running);  in btrfs_scrub_dev()
3898 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3905 		mutex_lock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3907 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_dev()
3915 	atomic_dec(&fs_info->scrubs_running);  in btrfs_scrub_dev()
3916 	wake_up(&fs_info->scrub_pause_wait);  in btrfs_scrub_dev()
3923 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3925 	scrub_workers_put(fs_info);  in btrfs_scrub_dev()
3926 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_dev()
3935 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_scrub_pause()  local
3937 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3938 	atomic_inc(&fs_info->scrub_pause_req);  in btrfs_scrub_pause()
3939 	while (atomic_read(&fs_info->scrubs_paused) !=  in btrfs_scrub_pause()
3940 	       atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_pause()
3941 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3942 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_pause()
3943 			   atomic_read(&fs_info->scrubs_paused) ==  in btrfs_scrub_pause()
3944 			   atomic_read(&fs_info->scrubs_running));  in btrfs_scrub_pause()
3945 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3947 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_pause()
3952 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_scrub_continue()  local
3954 	atomic_dec(&fs_info->scrub_pause_req);  in btrfs_scrub_continue()
3955 	wake_up(&fs_info->scrub_pause_wait);  in btrfs_scrub_continue()
3958 int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)  in btrfs_scrub_cancel()  argument
3960 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3961 	if (!atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_cancel()
3962 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3966 	atomic_inc(&fs_info->scrub_cancel_req);  in btrfs_scrub_cancel()
3967 	while (atomic_read(&fs_info->scrubs_running)) {  in btrfs_scrub_cancel()
3968 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3969 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_cancel()
3970 			   atomic_read(&fs_info->scrubs_running) == 0);  in btrfs_scrub_cancel()
3971 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3973 	atomic_dec(&fs_info->scrub_cancel_req);  in btrfs_scrub_cancel()
3974 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel()
3979 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info,  in btrfs_scrub_cancel_dev()  argument
3984 	mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3987 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3992 		mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3993 		wait_event(fs_info->scrub_pause_wait,  in btrfs_scrub_cancel_dev()
3995 		mutex_lock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
3997 	mutex_unlock(&fs_info->scrub_lock);  in btrfs_scrub_cancel_dev()
4008 	mutex_lock(&root->fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_progress()
4009 	dev = btrfs_find_device(root->fs_info, devid, NULL, NULL);  in btrfs_scrub_progress()
4014 	mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);  in btrfs_scrub_progress()
4019 static void scrub_remap_extent(struct btrfs_fs_info *fs_info,  in scrub_remap_extent()  argument
4030 	ret = btrfs_map_block(fs_info, READ, extent_logical,  in scrub_remap_extent()
4046 			      struct btrfs_fs_info *fs_info,  in scrub_setup_wr_ctx()  argument
4076 	struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;  in copy_nocow_pages()  local
4096 	btrfs_queue_work(fs_info->scrub_nocow_workers,  in copy_nocow_pages()
4130 	struct btrfs_fs_info *fs_info;  in copy_nocow_pages_worker()  local
4135 	fs_info = sctx->dev_root->fs_info;  in copy_nocow_pages_worker()
4136 	root = fs_info->extent_root;  in copy_nocow_pages_worker()
4153 	ret = iterate_inodes_from_logical(logical, fs_info, path,  in copy_nocow_pages_worker()
4156 		btrfs_warn(fs_info, "iterate_inodes_from_logical() failed: log %llu, "  in copy_nocow_pages_worker()
4194 		btrfs_dev_replace_stats_inc(&fs_info->dev_replace.  in copy_nocow_pages_worker()
4250 	struct btrfs_fs_info *fs_info = nocow_ctx->sctx->dev_root->fs_info;  in copy_nocow_pages_for_inode()  local
4268 	srcu_index = srcu_read_lock(&fs_info->subvol_srcu);  in copy_nocow_pages_for_inode()
4270 	local_root = btrfs_read_fs_root_no_name(fs_info, &key);  in copy_nocow_pages_for_inode()
4272 		srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in copy_nocow_pages_for_inode()
4279 	inode = btrfs_iget(fs_info->sb, &key, local_root, NULL);  in copy_nocow_pages_for_inode()
4280 	srcu_read_unlock(&fs_info->subvol_srcu, srcu_index);  in copy_nocow_pages_for_inode()
4303 			btrfs_err(fs_info, "find_or_create_page() failed");  in copy_nocow_pages_for_inode()
4380 		btrfs_warn_rl(dev->dev_root->fs_info,  in write_page_nocow()