80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/*
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* Copyright(c) 2012-2022 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __CASDISK_DISK_H__
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#define __CASDISK_DISK_H__
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#include <linux/kobject.h>
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#include <linux/fs.h>
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#include <linux/blkdev.h>
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#include <linux/mutex.h>
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#include <linux/blk-mq.h>
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#include "cas_cache.h"
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struct cas_exp_obj;
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struct cas_disk {
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uint32_t id;
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char *path;
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struct mutex openers_lock;
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unsigned int openers;
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bool claimed;
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struct block_device *bd;
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int gd_flags;
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int gd_minors;
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struct blk_mq_tag_set tag_set;
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struct cas_exp_obj *exp_obj;
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struct kobject kobj;
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void *private;
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};
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int __init cas_init_disks(void);
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void cas_deinit_disks(void);
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int cas_disk_allocate_minors(int count);
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/**
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* @brief Open block device
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* @param path Path to block device
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* @param private Private data
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* @return Pointer to cas_disk related to opened block device
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*/
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struct cas_disk *cas_disk_open(const char *path, void *private);
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/**
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* @brief Close block device and remove from cas
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* @param dsk Pointer to cas_disk structure related to block device
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* which should be closed.
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*/
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void cas_disk_close(struct cas_disk *dsk);
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/**
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* @brief Get block_device structure of bottom block device
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* @param dsk Pointer to cas_disk structure representing a block device
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* @return Pointer to block_device structure of bottom block device
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*/
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struct block_device *cas_disk_get_blkdev(struct cas_disk *dsk);
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/**
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* @brief Get request queue of bottom block device
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* @param dsk Pointer to cas_disk structure representing a block device
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* @return Pointer to reqest_queue structure of bottom block device
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*/
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struct request_queue *cas_disk_get_queue(struct cas_disk *dsk);
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/**
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* @brief Get gendisk structure of bottom block device
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* @param dsk Pointer to cas_disk structure representing a block device
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* @return Pointer to gendisk structure of bottom block device
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*/
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struct gendisk *cas_disk_get_gendisk(struct cas_disk *dsk);
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#endif
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