1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Internal header file for device mapper 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2016 Red Hat, Inc. All rights reserved. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * This file is released under the LGPL. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef DM_RQ_INTERNAL_H 10*4882a593Smuzhiyun #define DM_RQ_INTERNAL_H 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <linux/bio.h> 13*4882a593Smuzhiyun #include <linux/kthread.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include "dm-stats.h" 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun struct mapped_device; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun /* 20*4882a593Smuzhiyun * For request-based dm - the bio clones we allocate are embedded in these 21*4882a593Smuzhiyun * structs. 22*4882a593Smuzhiyun * 23*4882a593Smuzhiyun * We allocate these with bio_alloc_bioset, using the front_pad parameter when 24*4882a593Smuzhiyun * the bioset is created - this means the bio has to come at the end of the 25*4882a593Smuzhiyun * struct. 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun struct dm_rq_clone_bio_info { 28*4882a593Smuzhiyun struct bio *orig; 29*4882a593Smuzhiyun struct dm_rq_target_io *tio; 30*4882a593Smuzhiyun struct bio clone; 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t); 34*4882a593Smuzhiyun void dm_mq_cleanup_mapped_device(struct mapped_device *md); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun void dm_start_queue(struct request_queue *q); 37*4882a593Smuzhiyun void dm_stop_queue(struct request_queue *q); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun void dm_mq_kick_requeue_list(struct mapped_device *md); 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun unsigned dm_get_reserved_rq_based_ios(void); 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun ssize_t dm_attr_rq_based_seq_io_merge_deadline_show(struct mapped_device *md, char *buf); 44*4882a593Smuzhiyun ssize_t dm_attr_rq_based_seq_io_merge_deadline_store(struct mapped_device *md, 45*4882a593Smuzhiyun const char *buf, size_t count); 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #endif 48