280 	struct btrfs_block_group_cache *bg;  in btrfs_inc_nocow_writers()  local
283 	bg = btrfs_lookup_block_group(fs_info, bytenr);  in btrfs_inc_nocow_writers()
284 	if (!bg)  in btrfs_inc_nocow_writers()
287 	spin_lock(&bg->lock);  in btrfs_inc_nocow_writers()
288 	if (bg->ro)  in btrfs_inc_nocow_writers()
291 		atomic_inc(&bg->nocow_writers);  in btrfs_inc_nocow_writers()
292 	spin_unlock(&bg->lock);  in btrfs_inc_nocow_writers()
296 		btrfs_put_block_group(bg);  in btrfs_inc_nocow_writers()
303 	struct btrfs_block_group_cache *bg;  in btrfs_dec_nocow_writers()  local
305 	bg = btrfs_lookup_block_group(fs_info, bytenr);  in btrfs_dec_nocow_writers()
306 	ASSERT(bg);  in btrfs_dec_nocow_writers()
307 	if (atomic_dec_and_test(&bg->nocow_writers))  in btrfs_dec_nocow_writers()
308 		wake_up_var(&bg->nocow_writers);  in btrfs_dec_nocow_writers()
313 	btrfs_put_block_group(bg);  in btrfs_dec_nocow_writers()
314 	btrfs_put_block_group(bg);  in btrfs_dec_nocow_writers()
317 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg)  in btrfs_wait_nocow_writers()  argument
319 	wait_var_event(&bg->nocow_writers, !atomic_read(&bg->nocow_writers));  in btrfs_wait_nocow_writers()
325 	struct btrfs_block_group_cache *bg;  in btrfs_dec_block_group_reservations()  local
327 	bg = btrfs_lookup_block_group(fs_info, start);  in btrfs_dec_block_group_reservations()
328 	ASSERT(bg);  in btrfs_dec_block_group_reservations()
329 	if (atomic_dec_and_test(&bg->reservations))  in btrfs_dec_block_group_reservations()
330 		wake_up_var(&bg->reservations);  in btrfs_dec_block_group_reservations()
331 	btrfs_put_block_group(bg);  in btrfs_dec_block_group_reservations()
334 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg)  in btrfs_wait_block_group_reservations()  argument
336 	struct btrfs_space_info *space_info = bg->space_info;  in btrfs_wait_block_group_reservations()
338 	ASSERT(bg->ro);  in btrfs_wait_block_group_reservations()
340 	if (!(bg->flags & BTRFS_BLOCK_GROUP_DATA))  in btrfs_wait_block_group_reservations()
356 	wait_var_event(&bg->reservations, !atomic_read(&bg->reservations));  in btrfs_wait_block_group_reservations()
1413 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg)  in btrfs_mark_bg_unused()  argument
1415 	struct btrfs_fs_info *fs_info = bg->fs_info;  in btrfs_mark_bg_unused()
1418 	if (list_empty(&bg->bg_list)) {  in btrfs_mark_bg_unused()
1419 		btrfs_get_block_group(bg);  in btrfs_mark_bg_unused()
1420 		trace_btrfs_add_unused_block_group(bg);  in btrfs_mark_bg_unused()
1421 		list_add_tail(&bg->bg_list, &fs_info->unused_bgs);  in btrfs_mark_bg_unused()
1434 	struct btrfs_block_group_item bg;  in find_first_block_group()  local
1478 				read_extent_buffer(leaf, &bg,  in find_first_block_group()
1480 					sizeof(bg));  in find_first_block_group()
1481 				flags = btrfs_block_group_flags(&bg) &  in find_first_block_group()
1643 	struct btrfs_block_group_cache *bg;  in check_chunk_block_group_mappings()  local
1659 		bg = btrfs_lookup_block_group(fs_info, em->start);  in check_chunk_block_group_mappings()
1660 		if (!bg) {  in check_chunk_block_group_mappings()
1668 		if (bg->key.objectid != em->start ||  in check_chunk_block_group_mappings()
1669 		    bg->key.offset != em->len ||  in check_chunk_block_group_mappings()
1670 		    (bg->flags & BTRFS_BLOCK_GROUP_TYPE_MASK) !=  in check_chunk_block_group_mappings()
1676 				bg->key.objectid, bg->key.offset,  in check_chunk_block_group_mappings()
1677 				bg->flags & BTRFS_BLOCK_GROUP_TYPE_MASK);  in check_chunk_block_group_mappings()
1680 			btrfs_put_block_group(bg);  in check_chunk_block_group_mappings()
1685 		btrfs_put_block_group(bg);  in check_chunk_block_group_mappings()