7ee78ac51e
Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com> Signed-off-by: Rafal Stefanowski <rafal.stefanowski@huawei.com>
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
|
|
* Copyright(c) 2012-2022 Intel Corporation
|
|
* Copyright(c) 2024-2025 Huawei Technologies
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
#ifndef __CASDISK_EXP_OBJ_H__
|
|
#define __CASDISK_EXP_OBJ_H__
|
|
|
|
#include "linux_kernel_version.h"
|
|
#include <linux/fs.h>
|
|
|
|
struct cas_disk;
|
|
|
|
struct cas_exp_obj_ops {
|
|
/**
|
|
* @brief Set geometry of exported object (top) block device.
|
|
* Could be NULL.
|
|
*/
|
|
int (*set_geometry)(struct cas_disk *dsk, void *private);
|
|
|
|
/**
|
|
* @brief Set queue limits of exported object (top) block device.
|
|
*/
|
|
int (*set_queue_limits)(struct cas_disk *dsk, void *private,
|
|
cas_queue_limits_t *lim);
|
|
|
|
/**
|
|
* @brief submit_bio of exported object (top) block device.
|
|
*
|
|
*/
|
|
void (*submit_bio)(struct cas_disk *dsk,
|
|
struct bio *bio, void *private);
|
|
};
|
|
|
|
struct cas_exp_obj {
|
|
|
|
struct gendisk *gd;
|
|
struct request_queue *queue;
|
|
|
|
struct block_device *locked_bd;
|
|
|
|
struct module *owner;
|
|
|
|
struct cas_exp_obj_ops *ops;
|
|
|
|
const char *dev_name;
|
|
|
|
struct mutex openers_lock;
|
|
unsigned int openers;
|
|
bool claimed;
|
|
|
|
int gd_flags;
|
|
int gd_minors;
|
|
|
|
struct blk_mq_tag_set tag_set;
|
|
|
|
void *private;
|
|
};
|
|
|
|
int __init cas_init_exp_objs(void);
|
|
void cas_deinit_exp_objs(void);
|
|
|
|
void cas_exp_obj_cleanup(struct cas_disk *dsk);
|
|
|
|
/**
|
|
* @brief Create exported object (top device)
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @param dev_name Name of exported object (top device)
|
|
* @param owner Pointer to cas module
|
|
* @param ops Pointer to structure with callback functions
|
|
* @param priv Private data
|
|
* @return 0 if success, errno if failure
|
|
*/
|
|
int cas_exp_obj_create(struct cas_disk *dsk, const char *dev_name,
|
|
struct module *owner, struct cas_exp_obj_ops *ops, void *priv);
|
|
|
|
/**
|
|
* @brief Get request queue of exported object (top) block device
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @return Pointer to reqest_queue structure of top block device
|
|
*/
|
|
struct request_queue *cas_exp_obj_get_queue(struct cas_disk *dsk);
|
|
|
|
/**
|
|
* @brief Get gendisk structure of exported object (top) block device
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @return Pointer to gendisk structure of top block device
|
|
*/
|
|
struct gendisk *cas_exp_obj_get_gendisk(struct cas_disk *dsk);
|
|
|
|
/**
|
|
* @brief Lock exported object
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @return 0 if success, errno if failure
|
|
*/
|
|
int cas_exp_obj_lock(struct cas_disk *dsk);
|
|
|
|
/**
|
|
* @brief Unlock exported object
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @return 0 if success, errno if failure
|
|
*/
|
|
int cas_exp_obj_unlock(struct cas_disk *dsk);
|
|
|
|
/**
|
|
* @brief Destroy exported object
|
|
* @param dsk Pointer to cas_disk structure representing a block device
|
|
* @return 0 if success, errno if failure
|
|
*/
|
|
int cas_exp_obj_destroy(struct cas_disk *dsk);
|
|
|
|
#endif
|