76 static int block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv,
5221 				  struct btrfs_block_rsv *block_rsv,  in reserve_metadata_bytes()  argument
5230 	ret = __reserve_metadata_bytes(fs_info, block_rsv->space_info,  in reserve_metadata_bytes()
5234 		if (block_rsv != global_rsv &&  in reserve_metadata_bytes()
5240 					      block_rsv->space_info->flags,  in reserve_metadata_bytes()
5244 			dump_space_info(fs_info, block_rsv->space_info,  in reserve_metadata_bytes()
5255 	struct btrfs_block_rsv *block_rsv = NULL;  in get_block_rsv()  local
5260 		block_rsv = trans->block_rsv;  in get_block_rsv()
5262 	if (!block_rsv)  in get_block_rsv()
5263 		block_rsv = root->block_rsv;  in get_block_rsv()
5265 	if (!block_rsv)  in get_block_rsv()
5266 		block_rsv = &fs_info->empty_block_rsv;  in get_block_rsv()
5268 	return block_rsv;  in get_block_rsv()
5271 static int block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv,  in block_rsv_use_bytes()  argument
5275 	spin_lock(&block_rsv->lock);  in block_rsv_use_bytes()
5276 	if (block_rsv->reserved >= num_bytes) {  in block_rsv_use_bytes()
5277 		block_rsv->reserved -= num_bytes;  in block_rsv_use_bytes()
5278 		if (block_rsv->reserved < block_rsv->size)  in block_rsv_use_bytes()
5279 			block_rsv->full = 0;  in block_rsv_use_bytes()
5282 	spin_unlock(&block_rsv->lock);  in block_rsv_use_bytes()
5286 static void block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,  in block_rsv_add_bytes()  argument
5289 	spin_lock(&block_rsv->lock);  in block_rsv_add_bytes()
5290 	block_rsv->reserved += num_bytes;  in block_rsv_add_bytes()
5292 		block_rsv->size += num_bytes;  in block_rsv_add_bytes()
5293 	else if (block_rsv->reserved >= block_rsv->size)  in block_rsv_add_bytes()
5294 		block_rsv->full = 1;  in block_rsv_add_bytes()
5295 	spin_unlock(&block_rsv->lock);  in block_rsv_add_bytes()
5425 				    struct btrfs_block_rsv *block_rsv,  in block_rsv_release_bytes()  argument
5429 	struct btrfs_space_info *space_info = block_rsv->space_info;  in block_rsv_release_bytes()
5433 	spin_lock(&block_rsv->lock);  in block_rsv_release_bytes()
5435 		num_bytes = block_rsv->size;  in block_rsv_release_bytes()
5436 		qgroup_to_release = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
5438 	block_rsv->size -= num_bytes;  in block_rsv_release_bytes()
5439 	if (block_rsv->reserved >= block_rsv->size) {  in block_rsv_release_bytes()
5440 		num_bytes = block_rsv->reserved - block_rsv->size;  in block_rsv_release_bytes()
5441 		block_rsv->reserved = block_rsv->size;  in block_rsv_release_bytes()
5442 		block_rsv->full = 1;  in block_rsv_release_bytes()
5446 	if (block_rsv->qgroup_rsv_reserved >= block_rsv->qgroup_rsv_size) {  in block_rsv_release_bytes()
5447 		qgroup_to_release = block_rsv->qgroup_rsv_reserved -  in block_rsv_release_bytes()
5448 				    block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
5449 		block_rsv->qgroup_rsv_reserved = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
5453 	spin_unlock(&block_rsv->lock);  in block_rsv_release_bytes()
5513 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_block_rsv()  local
5515 	block_rsv = kmalloc(sizeof(*block_rsv), GFP_NOFS);  in btrfs_alloc_block_rsv()
5516 	if (!block_rsv)  in btrfs_alloc_block_rsv()
5519 	btrfs_init_metadata_block_rsv(fs_info, block_rsv, type);  in btrfs_alloc_block_rsv()
5520 	return block_rsv;  in btrfs_alloc_block_rsv()
5533 			struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_add()  argument
5541 	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_add()
5543 		block_rsv_add_bytes(block_rsv, num_bytes, 1);  in btrfs_block_rsv_add()
5550 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor)  in btrfs_block_rsv_check()  argument
5555 	if (!block_rsv)  in btrfs_block_rsv_check()
5558 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_check()
5559 	num_bytes = div_factor(block_rsv->size, min_factor);  in btrfs_block_rsv_check()
5560 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_check()
5562 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_check()
5568 			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,  in btrfs_block_rsv_refill()  argument
5574 	if (!block_rsv)  in btrfs_block_rsv_refill()
5577 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_refill()
5579 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_refill()
5582 		num_bytes -= block_rsv->reserved;  in btrfs_block_rsv_refill()
5583 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_refill()
5588 	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_refill()
5590 		block_rsv_add_bytes(block_rsv, num_bytes, 0);  in btrfs_block_rsv_refill()
5611 	struct btrfs_block_rsv *block_rsv = &inode->block_rsv;  in btrfs_inode_rsv_refill()  local
5616 	spin_lock(&block_rsv->lock);  in btrfs_inode_rsv_refill()
5617 	if (block_rsv->reserved < block_rsv->size)  in btrfs_inode_rsv_refill()
5618 		num_bytes = block_rsv->size - block_rsv->reserved;  in btrfs_inode_rsv_refill()
5619 	if (block_rsv->qgroup_rsv_reserved < block_rsv->qgroup_rsv_size)  in btrfs_inode_rsv_refill()
5620 		qgroup_num_bytes = block_rsv->qgroup_rsv_size -  in btrfs_inode_rsv_refill()
5621 				   block_rsv->qgroup_rsv_reserved;  in btrfs_inode_rsv_refill()
5622 	spin_unlock(&block_rsv->lock);  in btrfs_inode_rsv_refill()
5630 	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_inode_rsv_refill()
5632 		block_rsv_add_bytes(block_rsv, num_bytes, 0);  in btrfs_inode_rsv_refill()
5637 		spin_lock(&block_rsv->lock);  in btrfs_inode_rsv_refill()
5638 		block_rsv->qgroup_rsv_reserved += qgroup_num_bytes;  in btrfs_inode_rsv_refill()
5639 		spin_unlock(&block_rsv->lock);  in btrfs_inode_rsv_refill()
5660 	struct btrfs_block_rsv *block_rsv = &inode->block_rsv;  in btrfs_inode_rsv_release()  local
5669 	released = block_rsv_release_bytes(fs_info, block_rsv, global_rsv, 0,  in btrfs_inode_rsv_release()
5682 			     struct btrfs_block_rsv *block_rsv,  in btrfs_block_rsv_release()  argument
5687 	if (global_rsv == block_rsv ||  in btrfs_block_rsv_release()
5688 	    block_rsv->space_info != global_rsv->space_info)  in btrfs_block_rsv_release()
5690 	block_rsv_release_bytes(fs_info, block_rsv, global_rsv, num_bytes, NULL);  in btrfs_block_rsv_release()
5695 	struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;  in update_global_block_rsv()  local
5696 	struct btrfs_space_info *sinfo = block_rsv->space_info;  in update_global_block_rsv()
5710 	spin_lock(&block_rsv->lock);  in update_global_block_rsv()
5712 	block_rsv->size = min_t(u64, num_bytes, SZ_512M);  in update_global_block_rsv()
5714 	if (block_rsv->reserved < block_rsv->size) {  in update_global_block_rsv()
5719 					block_rsv->size - block_rsv->reserved);  in update_global_block_rsv()
5720 			block_rsv->reserved += num_bytes;  in update_global_block_rsv()
5726 	} else if (block_rsv->reserved > block_rsv->size) {  in update_global_block_rsv()
5727 		num_bytes = block_rsv->reserved - block_rsv->size;  in update_global_block_rsv()
5731 		block_rsv->reserved = block_rsv->size;  in update_global_block_rsv()
5734 	if (block_rsv->reserved == block_rsv->size)  in update_global_block_rsv()
5735 		block_rsv->full = 1;  in update_global_block_rsv()
5737 		block_rsv->full = 0;  in update_global_block_rsv()
5739 	spin_unlock(&block_rsv->lock);  in update_global_block_rsv()
5756 	fs_info->extent_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5757 	fs_info->csum_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5758 	fs_info->dev_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5759 	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5761 		fs_info->quota_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5762 	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;  in init_global_block_rsv()
5855 	struct btrfs_block_rsv *block_rsv = &inode->block_rsv;  in btrfs_calculate_inode_block_rsv_size()  local
5878 	spin_lock(&block_rsv->lock);  in btrfs_calculate_inode_block_rsv_size()
5879 	block_rsv->size = reserve_size;  in btrfs_calculate_inode_block_rsv_size()
5880 	block_rsv->qgroup_rsv_size = qgroup_rsv_size;  in btrfs_calculate_inode_block_rsv_size()
5881 	spin_unlock(&block_rsv->lock);  in btrfs_calculate_inode_block_rsv_size()
8165 	struct btrfs_block_rsv *block_rsv;  in use_block_rsv()  local
8170 	block_rsv = get_block_rsv(trans, root);  in use_block_rsv()
8172 	if (unlikely(block_rsv->size == 0))  in use_block_rsv()
8175 	ret = block_rsv_use_bytes(block_rsv, blocksize);  in use_block_rsv()
8177 		return block_rsv;  in use_block_rsv()
8179 	if (block_rsv->failfast)  in use_block_rsv()
8182 	if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {  in use_block_rsv()
8197 	ret = reserve_metadata_bytes(root, block_rsv, blocksize,  in use_block_rsv()
8200 		return block_rsv;  in use_block_rsv()
8206 	if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL &&  in use_block_rsv()
8207 	    block_rsv->space_info == global_rsv->space_info) {  in use_block_rsv()
8216 			    struct btrfs_block_rsv *block_rsv, u32 blocksize)  in unuse_block_rsv()  argument
8218 	block_rsv_add_bytes(block_rsv, blocksize, 0);  in unuse_block_rsv()
8219 	block_rsv_release_bytes(fs_info, block_rsv, NULL, 0, NULL);  in unuse_block_rsv()
8235 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_tree_block()  local
8253 	block_rsv = use_block_rsv(trans, root, blocksize);  in btrfs_alloc_tree_block()
8254 	if (IS_ERR(block_rsv))  in btrfs_alloc_tree_block()
8255 		return ERR_CAST(block_rsv);  in btrfs_alloc_tree_block()
8312 	unuse_block_rsv(fs_info, block_rsv, blocksize);  in btrfs_alloc_tree_block()
8863 			 struct btrfs_block_rsv *block_rsv, int update_ref,  in btrfs_drop_snapshot()  argument
8899 	if (block_rsv)  in btrfs_drop_snapshot()
8900 		trans->block_rsv = block_rsv;  in btrfs_drop_snapshot()
9017 			if (block_rsv)  in btrfs_drop_snapshot()
9018 				trans->block_rsv = block_rsv;  in btrfs_drop_snapshot()