111 static int block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv,
4346 	struct btrfs_block_rsv *block_rsv;  in shrink_delalloc()  local
4362 	block_rsv = &root->fs_info->delalloc_block_rsv;  in shrink_delalloc()
4363 	space_info = block_rsv->space_info;  in shrink_delalloc()
4660 				  struct btrfs_block_rsv *block_rsv,  in reserve_metadata_bytes()  argument
4664 	struct btrfs_space_info *space_info = block_rsv->space_info;  in reserve_metadata_bytes()
4798 		if (block_rsv != global_rsv &&  in reserve_metadata_bytes()
4819 	struct btrfs_block_rsv *block_rsv = NULL;  in get_block_rsv()  local
4822 		block_rsv = trans->block_rsv;  in get_block_rsv()
4825 		block_rsv = trans->block_rsv;  in get_block_rsv()
4828 		block_rsv = trans->block_rsv;  in get_block_rsv()
4830 	if (!block_rsv)  in get_block_rsv()
4831 		block_rsv = root->block_rsv;  in get_block_rsv()
4833 	if (!block_rsv)  in get_block_rsv()
4834 		block_rsv = &root->fs_info->empty_block_rsv;  in get_block_rsv()
4836 	return block_rsv;  in get_block_rsv()
4839 static int block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv,  in block_rsv_use_bytes()  argument
4843 	spin_lock(&block_rsv->lock);  in block_rsv_use_bytes()
4844 	if (block_rsv->reserved >= num_bytes) {  in block_rsv_use_bytes()
4845 		block_rsv->reserved -= num_bytes;  in block_rsv_use_bytes()
4846 		if (block_rsv->reserved < block_rsv->size)  in block_rsv_use_bytes()
4847 			block_rsv->full = 0;  in block_rsv_use_bytes()
4850 	spin_unlock(&block_rsv->lock);  in block_rsv_use_bytes()
4854 static void block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,  in block_rsv_add_bytes()  argument
4857 	spin_lock(&block_rsv->lock);  in block_rsv_add_bytes()
4858 	block_rsv->reserved += num_bytes;  in block_rsv_add_bytes()
4860 		block_rsv->size += num_bytes;  in block_rsv_add_bytes()
4861 	else if (block_rsv->reserved >= block_rsv->size)  in block_rsv_add_bytes()
4862 		block_rsv->full = 1;  in block_rsv_add_bytes()
4863 	spin_unlock(&block_rsv->lock);  in block_rsv_add_bytes()
4892 				    struct btrfs_block_rsv *block_rsv,  in block_rsv_release_bytes()  argument
4895 	struct btrfs_space_info *space_info = block_rsv->space_info;  in block_rsv_release_bytes()
4897 	spin_lock(&block_rsv->lock);  in block_rsv_release_bytes()
4899 		num_bytes = block_rsv->size;  in block_rsv_release_bytes()
4900 	block_rsv->size -= num_bytes;  in block_rsv_release_bytes()
4901 	if (block_rsv->reserved >= block_rsv->size) {  in block_rsv_release_bytes()
4902 		num_bytes = block_rsv->reserved - block_rsv->size;  in block_rsv_release_bytes()
4903 		block_rsv->reserved = block_rsv->size;  in block_rsv_release_bytes()
4904 		block_rsv->full = 1;  in block_rsv_release_bytes()
4908 	spin_unlock(&block_rsv->lock);  in block_rsv_release_bytes()
4958 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_block_rsv()  local
4961 	block_rsv = kmalloc(sizeof(*block_rsv), GFP_NOFS);  in btrfs_alloc_block_rsv()
4962 	if (!block_rsv)  in btrfs_alloc_block_rsv()
4965 	btrfs_init_block_rsv(block_rsv, type);  in btrfs_alloc_block_rsv()
4966 	block_rsv->space_info = __find_space_info(fs_info,  in btrfs_alloc_block_rsv()
4968 	return block_rsv;  in btrfs_alloc_block_rsv()
4986 			struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_add()  argument
4994 	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_add()
4996 		block_rsv_add_bytes(block_rsv, num_bytes, 1);  in btrfs_block_rsv_add()
5004 			  struct btrfs_block_rsv *block_rsv, int min_factor)  in btrfs_block_rsv_check()  argument
5009 	if (!block_rsv)  in btrfs_block_rsv_check()
5012 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_check()
5013 	num_bytes = div_factor(block_rsv->size, min_factor);  in btrfs_block_rsv_check()
5014 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_check()
5016 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_check()
5022 			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,  in btrfs_block_rsv_refill()  argument
5028 	if (!block_rsv)  in btrfs_block_rsv_refill()
5031 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_refill()
5033 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_refill()
5036 		num_bytes -= block_rsv->reserved;  in btrfs_block_rsv_refill()
5037 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_refill()
5042 	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_refill()
5044 		block_rsv_add_bytes(block_rsv, num_bytes, 0);  in btrfs_block_rsv_refill()
5059 			     struct btrfs_block_rsv *block_rsv,  in btrfs_block_rsv_release()  argument
5063 	if (global_rsv == block_rsv ||  in btrfs_block_rsv_release()
5064 	    block_rsv->space_info != global_rsv->space_info)  in btrfs_block_rsv_release()
5066 	block_rsv_release_bytes(root->fs_info, block_rsv, global_rsv,  in btrfs_block_rsv_release()
5107 	struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;  in update_global_block_rsv()  local
5108 	struct btrfs_space_info *sinfo = block_rsv->space_info;  in update_global_block_rsv()
5114 	spin_lock(&block_rsv->lock);  in update_global_block_rsv()
5116 	block_rsv->size = min_t(u64, num_bytes, 512 * 1024 * 1024);  in update_global_block_rsv()
5124 		block_rsv->reserved += num_bytes;  in update_global_block_rsv()
5130 	if (block_rsv->reserved >= block_rsv->size) {  in update_global_block_rsv()
5131 		num_bytes = block_rsv->reserved - block_rsv->size;  in update_global_block_rsv()
5135 		block_rsv->reserved = block_rsv->size;  in update_global_block_rsv()
5136 		block_rsv->full = 1;  in update_global_block_rsv()
5139 	spin_unlock(&block_rsv->lock);  in update_global_block_rsv()
5157 	fs_info->extent_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5158 	fs_info->csum_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5159 	fs_info->dev_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5160 	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5162 		fs_info->quota_root->block_rsv = &fs_info->global_block_rsv;  in init_global_block_rsv()
5163 	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;  in init_global_block_rsv()
5185 	if (!trans->block_rsv)  in btrfs_trans_release_metadata()
5193 	btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved);  in btrfs_trans_release_metadata()
5376 	struct btrfs_block_rsv *block_rsv = &root->fs_info->delalloc_block_rsv;  in btrfs_delalloc_reserve_metadata()  local
5439 	ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);  in btrfs_delalloc_reserve_metadata()
5461 	block_rsv_add_bytes(block_rsv, to_reserve, 1);  in btrfs_delalloc_reserve_metadata()
5520 		btrfs_block_rsv_release(root, block_rsv, to_free);  in btrfs_delalloc_reserve_metadata()
7516 	struct btrfs_block_rsv *block_rsv;  in use_block_rsv()  local
7521 	block_rsv = get_block_rsv(trans, root);  in use_block_rsv()
7523 	if (unlikely(block_rsv->size == 0))  in use_block_rsv()
7526 	ret = block_rsv_use_bytes(block_rsv, blocksize);  in use_block_rsv()
7528 		return block_rsv;  in use_block_rsv()
7530 	if (block_rsv->failfast)  in use_block_rsv()
7533 	if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {  in use_block_rsv()
7548 	ret = reserve_metadata_bytes(root, block_rsv, blocksize,  in use_block_rsv()
7551 		return block_rsv;  in use_block_rsv()
7557 	if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL &&  in use_block_rsv()
7558 	    block_rsv->space_info == global_rsv->space_info) {  in use_block_rsv()
7567 			    struct btrfs_block_rsv *block_rsv, u32 blocksize)  in unuse_block_rsv()  argument
7569 	block_rsv_add_bytes(block_rsv, blocksize, 0);  in unuse_block_rsv()
7570 	block_rsv_release_bytes(fs_info, block_rsv, NULL, 0);  in unuse_block_rsv()
7587 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_tree_block()  local
7604 	block_rsv = use_block_rsv(trans, root, blocksize);  in btrfs_alloc_tree_block()
7605 	if (IS_ERR(block_rsv))  in btrfs_alloc_tree_block()
7606 		return ERR_CAST(block_rsv);  in btrfs_alloc_tree_block()
7662 	unuse_block_rsv(root->fs_info, block_rsv, blocksize);  in btrfs_alloc_tree_block()
8401 			 struct btrfs_block_rsv *block_rsv, int update_ref,  in btrfs_drop_snapshot()  argument
8436 	if (block_rsv)  in btrfs_drop_snapshot()
8437 		trans->block_rsv = block_rsv;  in btrfs_drop_snapshot()
8572 			if (block_rsv)  in btrfs_drop_snapshot()
8573 				trans->block_rsv = block_rsv;  in btrfs_drop_snapshot()