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Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
This commit is contained in:
Robert Baldyga
2019-03-29 08:39:34 +01:00
commit 94e8ca09e0
140 changed files with 37144 additions and 0 deletions
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96
modules/cas_disk/disk.h Normal file
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/*
* Copyright(c) 2012-2019 Intel Corporation
* SPDX-License-Identifier: BSD-3-Clause-Clear
*/
#ifndef __
#define __CASDISK_DISK_H__
#include <linux/kobject.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
struct casdsk_exp_obj;
#define CASDSK_MODE_UNKNOWN 0
#define CASDSK_MODE_PT (1 << 0)
#define CASDSK_MODE_ATTACHED (1 << 1)
#define CASDSK_MODE_SHUTDOWN (1 << 2)
#define CASDSK_MODE_TRANSITION (1 << 3)
#define CASDSK_MODE_TRANS_TO_ATTACHED (CASDSK_MODE_PT | CASDSK_MODE_TRANSITION)
#define CASDSK_MODE_TRANS_TO_PT (CASDSK_MODE_ATTACHED | \
CASDSK_MODE_TRANSITION)
#define CASDSK_MODE_TRANS_TO_SHUTDOWN (CASDSK_MODE_SHUTDOWN | \
CASDSK_MODE_TRANSITION)
struct casdsk_disk {
uint32_t id;
atomic_t mode;
char *path;
struct mutex lock;
struct block_device *bd;
int gd_flags;
int gd_minors;
struct casdsk_exp_obj *exp_obj;
struct kobject kobj;
struct list_head list;
void *private;
};
int __init casdsk_init_disks(void);
void casdsk_deinit_disks(void);
void __exit casdsk_disk_shutdown_all(void);
int casdsk_disk_allocate_minors(int count);
static inline void casdsk_disk_lock(struct casdsk_disk *dsk)
{
mutex_lock(&dsk->lock);
}
static inline void casdsk_disk_unlock(struct casdsk_disk *dsk)
{
mutex_unlock(&dsk->lock);
}
static inline struct casdsk_disk *casdsk_kobj_to_disk(struct kobject *kobj)
{
return container_of(kobj, struct casdsk_disk, kobj);
}
static inline bool casdsk_disk_in_transition(struct casdsk_disk *dsk)
{
return (atomic_read(&dsk->mode) & CASDSK_MODE_TRANSITION) ==
CASDSK_MODE_TRANSITION;
}
static inline bool casdsk_disk_is_attached(struct casdsk_disk *dsk)
{
return (atomic_read(&dsk->mode) & CASDSK_MODE_ATTACHED) ==
CASDSK_MODE_ATTACHED;
}
static inline bool casdsk_disk_is_pt(struct casdsk_disk *dsk)
{
return (atomic_read(&dsk->mode) & CASDSK_MODE_PT) == CASDSK_MODE_PT;
}
static inline bool casdsk_disk_is_shutdown(struct casdsk_disk *dsk)
{
return (atomic_read(&dsk->mode) & CASDSK_MODE_SHUTDOWN) ==
CASDSK_MODE_SHUTDOWN;
}
static inline bool casdsk_disk_is_unknown(struct casdsk_disk *dsk)
{
return atomic_read(&dsk->mode) == CASDSK_MODE_UNKNOWN;
}
#endif