104 				    struct btrfs_block_rsv *block_rsv,  in block_rsv_release_bytes()  argument
108 	struct btrfs_space_info *space_info = block_rsv->space_info;  in block_rsv_release_bytes()
112 	spin_lock(&block_rsv->lock);  in block_rsv_release_bytes()
114 		num_bytes = block_rsv->size;  in block_rsv_release_bytes()
115 		qgroup_to_release = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
117 	block_rsv->size -= num_bytes;  in block_rsv_release_bytes()
118 	if (block_rsv->reserved >= block_rsv->size) {  in block_rsv_release_bytes()
119 		num_bytes = block_rsv->reserved - block_rsv->size;  in block_rsv_release_bytes()
120 		block_rsv->reserved = block_rsv->size;  in block_rsv_release_bytes()
121 		block_rsv->full = true;  in block_rsv_release_bytes()
125 	if (block_rsv->qgroup_rsv_reserved >= block_rsv->qgroup_rsv_size) {  in block_rsv_release_bytes()
126 		qgroup_to_release = block_rsv->qgroup_rsv_reserved -  in block_rsv_release_bytes()
127 				    block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
128 		block_rsv->qgroup_rsv_reserved = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
132 	spin_unlock(&block_rsv->lock);  in block_rsv_release_bytes()
193 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_block_rsv()  local
195 	block_rsv = kmalloc(sizeof(*block_rsv), GFP_NOFS);  in btrfs_alloc_block_rsv()
196 	if (!block_rsv)  in btrfs_alloc_block_rsv()
199 	btrfs_init_metadata_block_rsv(fs_info, block_rsv, type);  in btrfs_alloc_block_rsv()
200 	return block_rsv;  in btrfs_alloc_block_rsv()
213 			struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_add()  argument
221 	ret = btrfs_reserve_metadata_bytes(fs_info, block_rsv, num_bytes, flush);  in btrfs_block_rsv_add()
223 		btrfs_block_rsv_add_bytes(block_rsv, num_bytes, true);  in btrfs_block_rsv_add()
228 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor)  in btrfs_block_rsv_check()  argument
233 	if (!block_rsv)  in btrfs_block_rsv_check()
236 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_check()
237 	num_bytes = div_factor(block_rsv->size, min_factor);  in btrfs_block_rsv_check()
238 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_check()
240 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_check()
246 			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,  in btrfs_block_rsv_refill()  argument
252 	if (!block_rsv)  in btrfs_block_rsv_refill()
255 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_refill()
257 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_refill()
260 		num_bytes -= block_rsv->reserved;  in btrfs_block_rsv_refill()
261 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_refill()
266 	ret = btrfs_reserve_metadata_bytes(fs_info, block_rsv, num_bytes, flush);  in btrfs_block_rsv_refill()
268 		btrfs_block_rsv_add_bytes(block_rsv, num_bytes, false);  in btrfs_block_rsv_refill()
276 			    struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_release()  argument
287 	if (block_rsv == delayed_rsv)  in btrfs_block_rsv_release()
289 	else if (block_rsv != global_rsv && !btrfs_block_rsv_full(delayed_rsv))  in btrfs_block_rsv_release()
292 	if (target && block_rsv->space_info != target->space_info)  in btrfs_block_rsv_release()
295 	return block_rsv_release_bytes(fs_info, block_rsv, target, num_bytes,  in btrfs_block_rsv_release()
299 int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes)  in btrfs_block_rsv_use_bytes()  argument
303 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_use_bytes()
304 	if (block_rsv->reserved >= num_bytes) {  in btrfs_block_rsv_use_bytes()
305 		block_rsv->reserved -= num_bytes;  in btrfs_block_rsv_use_bytes()
306 		if (block_rsv->reserved < block_rsv->size)  in btrfs_block_rsv_use_bytes()
307 			block_rsv->full = false;  in btrfs_block_rsv_use_bytes()
310 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_use_bytes()
314 void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,  in btrfs_block_rsv_add_bytes()  argument
317 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_add_bytes()
318 	block_rsv->reserved += num_bytes;  in btrfs_block_rsv_add_bytes()
320 		block_rsv->size += num_bytes;  in btrfs_block_rsv_add_bytes()
321 	else if (block_rsv->reserved >= block_rsv->size)  in btrfs_block_rsv_add_bytes()
322 		block_rsv->full = true;  in btrfs_block_rsv_add_bytes()
323 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_add_bytes()
353 	struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;  in btrfs_update_global_block_rsv()  local
354 	struct btrfs_space_info *sinfo = block_rsv->space_info;  in btrfs_update_global_block_rsv()
394 	spin_lock(&block_rsv->lock);  in btrfs_update_global_block_rsv()
396 	block_rsv->size = min_t(u64, num_bytes, SZ_512M);  in btrfs_update_global_block_rsv()
398 	if (block_rsv->reserved < block_rsv->size) {  in btrfs_update_global_block_rsv()
399 		num_bytes = block_rsv->size - block_rsv->reserved;  in btrfs_update_global_block_rsv()
402 		block_rsv->reserved = block_rsv->size;  in btrfs_update_global_block_rsv()
403 	} else if (block_rsv->reserved > block_rsv->size) {  in btrfs_update_global_block_rsv()
404 		num_bytes = block_rsv->reserved - block_rsv->size;  in btrfs_update_global_block_rsv()
407 		block_rsv->reserved = block_rsv->size;  in btrfs_update_global_block_rsv()
411 	block_rsv->full = (block_rsv->reserved == block_rsv->size);  in btrfs_update_global_block_rsv()
413 	if (block_rsv->size >= sinfo->total_bytes)  in btrfs_update_global_block_rsv()
415 	spin_unlock(&block_rsv->lock);  in btrfs_update_global_block_rsv()
428 		root->block_rsv = &fs_info->delayed_refs_rsv;  in btrfs_init_root_block_rsv()
433 		root->block_rsv = &fs_info->global_block_rsv;  in btrfs_init_root_block_rsv()
436 		root->block_rsv = &fs_info->chunk_block_rsv;  in btrfs_init_root_block_rsv()
439 		root->block_rsv = NULL;  in btrfs_init_root_block_rsv()
480 	struct btrfs_block_rsv *block_rsv = NULL;  in get_block_rsv()  local
486 		block_rsv = trans->block_rsv;  in get_block_rsv()
488 	if (!block_rsv)  in get_block_rsv()
489 		block_rsv = root->block_rsv;  in get_block_rsv()
491 	if (!block_rsv)  in get_block_rsv()
492 		block_rsv = &fs_info->empty_block_rsv;  in get_block_rsv()
494 	return block_rsv;  in get_block_rsv()
502 	struct btrfs_block_rsv *block_rsv;  in btrfs_use_block_rsv()  local
507 	block_rsv = get_block_rsv(trans, root);  in btrfs_use_block_rsv()
509 	if (unlikely(block_rsv->size == 0))  in btrfs_use_block_rsv()
512 	ret = btrfs_block_rsv_use_bytes(block_rsv, blocksize);  in btrfs_use_block_rsv()
514 		return block_rsv;  in btrfs_use_block_rsv()
516 	if (block_rsv->failfast)  in btrfs_use_block_rsv()
519 	if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {  in btrfs_use_block_rsv()
529 	if (block_rsv->type != BTRFS_BLOCK_RSV_DELREFS &&  in btrfs_use_block_rsv()
537 				block_rsv->type, ret);  in btrfs_use_block_rsv()
540 	ret = btrfs_reserve_metadata_bytes(fs_info, block_rsv, blocksize,  in btrfs_use_block_rsv()
543 		return block_rsv;  in btrfs_use_block_rsv()
549 	if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL &&  in btrfs_use_block_rsv()
550 	    block_rsv->space_info == global_rsv->space_info) {  in btrfs_use_block_rsv()