103 				    struct btrfs_block_rsv *block_rsv,  in block_rsv_release_bytes()  argument
107 	struct btrfs_space_info *space_info = block_rsv->space_info;  in block_rsv_release_bytes()
111 	spin_lock(&block_rsv->lock);  in block_rsv_release_bytes()
113 		num_bytes = block_rsv->size;  in block_rsv_release_bytes()
114 		qgroup_to_release = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
116 	block_rsv->size -= num_bytes;  in block_rsv_release_bytes()
117 	if (block_rsv->reserved >= block_rsv->size) {  in block_rsv_release_bytes()
118 		num_bytes = block_rsv->reserved - block_rsv->size;  in block_rsv_release_bytes()
119 		block_rsv->reserved = block_rsv->size;  in block_rsv_release_bytes()
120 		block_rsv->full = 1;  in block_rsv_release_bytes()
124 	if (block_rsv->qgroup_rsv_reserved >= block_rsv->qgroup_rsv_size) {  in block_rsv_release_bytes()
125 		qgroup_to_release = block_rsv->qgroup_rsv_reserved -  in block_rsv_release_bytes()
126 				    block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
127 		block_rsv->qgroup_rsv_reserved = block_rsv->qgroup_rsv_size;  in block_rsv_release_bytes()
131 	spin_unlock(&block_rsv->lock);  in block_rsv_release_bytes()
192 	struct btrfs_block_rsv *block_rsv;  in btrfs_alloc_block_rsv()  local
194 	block_rsv = kmalloc(sizeof(*block_rsv), GFP_NOFS);  in btrfs_alloc_block_rsv()
195 	if (!block_rsv)  in btrfs_alloc_block_rsv()
198 	btrfs_init_metadata_block_rsv(fs_info, block_rsv, type);  in btrfs_alloc_block_rsv()
199 	return block_rsv;  in btrfs_alloc_block_rsv()
212 			struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_add()  argument
220 	ret = btrfs_reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_add()
222 		btrfs_block_rsv_add_bytes(block_rsv, num_bytes, true);  in btrfs_block_rsv_add()
227 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor)  in btrfs_block_rsv_check()  argument
232 	if (!block_rsv)  in btrfs_block_rsv_check()
235 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_check()
236 	num_bytes = div_factor(block_rsv->size, min_factor);  in btrfs_block_rsv_check()
237 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_check()
239 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_check()
245 			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,  in btrfs_block_rsv_refill()  argument
251 	if (!block_rsv)  in btrfs_block_rsv_refill()
254 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_refill()
256 	if (block_rsv->reserved >= num_bytes)  in btrfs_block_rsv_refill()
259 		num_bytes -= block_rsv->reserved;  in btrfs_block_rsv_refill()
260 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_refill()
265 	ret = btrfs_reserve_metadata_bytes(root, block_rsv, num_bytes, flush);  in btrfs_block_rsv_refill()
267 		btrfs_block_rsv_add_bytes(block_rsv, num_bytes, false);  in btrfs_block_rsv_refill()
275 			    struct btrfs_block_rsv *block_rsv, u64 num_bytes,  in btrfs_block_rsv_release()  argument
286 	if (block_rsv == delayed_rsv)  in btrfs_block_rsv_release()
288 	else if (block_rsv != global_rsv && !delayed_rsv->full)  in btrfs_block_rsv_release()
291 	if (target && block_rsv->space_info != target->space_info)  in btrfs_block_rsv_release()
294 	return block_rsv_release_bytes(fs_info, block_rsv, target, num_bytes,  in btrfs_block_rsv_release()
298 int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes)  in btrfs_block_rsv_use_bytes()  argument
302 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_use_bytes()
303 	if (block_rsv->reserved >= num_bytes) {  in btrfs_block_rsv_use_bytes()
304 		block_rsv->reserved -= num_bytes;  in btrfs_block_rsv_use_bytes()
305 		if (block_rsv->reserved < block_rsv->size)  in btrfs_block_rsv_use_bytes()
306 			block_rsv->full = 0;  in btrfs_block_rsv_use_bytes()
309 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_use_bytes()
313 void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,  in btrfs_block_rsv_add_bytes()  argument
316 	spin_lock(&block_rsv->lock);  in btrfs_block_rsv_add_bytes()
317 	block_rsv->reserved += num_bytes;  in btrfs_block_rsv_add_bytes()
319 		block_rsv->size += num_bytes;  in btrfs_block_rsv_add_bytes()
320 	else if (block_rsv->reserved >= block_rsv->size)  in btrfs_block_rsv_add_bytes()
321 		block_rsv->full = 1;  in btrfs_block_rsv_add_bytes()
322 	spin_unlock(&block_rsv->lock);  in btrfs_block_rsv_add_bytes()
352 	struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;  in btrfs_update_global_block_rsv()  local
353 	struct btrfs_space_info *sinfo = block_rsv->space_info;  in btrfs_update_global_block_rsv()
387 	spin_lock(&block_rsv->lock);  in btrfs_update_global_block_rsv()
389 	block_rsv->size = min_t(u64, num_bytes, SZ_512M);  in btrfs_update_global_block_rsv()
391 	if (block_rsv->reserved < block_rsv->size) {  in btrfs_update_global_block_rsv()
392 		num_bytes = block_rsv->size - block_rsv->reserved;  in btrfs_update_global_block_rsv()
395 		block_rsv->reserved = block_rsv->size;  in btrfs_update_global_block_rsv()
396 	} else if (block_rsv->reserved > block_rsv->size) {  in btrfs_update_global_block_rsv()
397 		num_bytes = block_rsv->reserved - block_rsv->size;  in btrfs_update_global_block_rsv()
400 		block_rsv->reserved = block_rsv->size;  in btrfs_update_global_block_rsv()
404 	if (block_rsv->reserved == block_rsv->size)  in btrfs_update_global_block_rsv()
405 		block_rsv->full = 1;  in btrfs_update_global_block_rsv()
407 		block_rsv->full = 0;  in btrfs_update_global_block_rsv()
409 	if (block_rsv->size >= sinfo->total_bytes)  in btrfs_update_global_block_rsv()
411 	spin_unlock(&block_rsv->lock);  in btrfs_update_global_block_rsv()
429 	fs_info->extent_root->block_rsv = &fs_info->delayed_refs_rsv;  in btrfs_init_global_block_rsv()
430 	fs_info->csum_root->block_rsv = &fs_info->delayed_refs_rsv;  in btrfs_init_global_block_rsv()
431 	fs_info->dev_root->block_rsv = &fs_info->global_block_rsv;  in btrfs_init_global_block_rsv()
432 	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;  in btrfs_init_global_block_rsv()
434 		fs_info->quota_root->block_rsv = &fs_info->global_block_rsv;  in btrfs_init_global_block_rsv()
435 	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;  in btrfs_init_global_block_rsv()
459 	struct btrfs_block_rsv *block_rsv = NULL;  in get_block_rsv()  local
464 		block_rsv = trans->block_rsv;  in get_block_rsv()
466 	if (!block_rsv)  in get_block_rsv()
467 		block_rsv = root->block_rsv;  in get_block_rsv()
469 	if (!block_rsv)  in get_block_rsv()
470 		block_rsv = &fs_info->empty_block_rsv;  in get_block_rsv()
472 	return block_rsv;  in get_block_rsv()
480 	struct btrfs_block_rsv *block_rsv;  in btrfs_use_block_rsv()  local
485 	block_rsv = get_block_rsv(trans, root);  in btrfs_use_block_rsv()
487 	if (unlikely(block_rsv->size == 0))  in btrfs_use_block_rsv()
490 	ret = btrfs_block_rsv_use_bytes(block_rsv, blocksize);  in btrfs_use_block_rsv()
492 		return block_rsv;  in btrfs_use_block_rsv()
494 	if (block_rsv->failfast)  in btrfs_use_block_rsv()
497 	if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {  in btrfs_use_block_rsv()
507 	if (block_rsv->type != BTRFS_BLOCK_RSV_DELREFS &&  in btrfs_use_block_rsv()
515 				block_rsv->type, ret);  in btrfs_use_block_rsv()
518 	ret = btrfs_reserve_metadata_bytes(root, block_rsv, blocksize,  in btrfs_use_block_rsv()
521 		return block_rsv;  in btrfs_use_block_rsv()
527 	if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL &&  in btrfs_use_block_rsv()
528 	    block_rsv->space_info == global_rsv->space_info) {  in btrfs_use_block_rsv()