99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/*
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* Copyright(c) 2012-2020 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __
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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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struct casdsk_exp_obj;
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#define CASDSK_MODE_UNKNOWN 0
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#define CASDSK_MODE_PT (1 << 0)
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#define CASDSK_MODE_ATTACHED (1 << 1)
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#define CASDSK_MODE_SHUTDOWN (1 << 2)
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#define CASDSK_MODE_TRANSITION (1 << 3)
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#define CASDSK_MODE_TRANS_TO_ATTACHED (CASDSK_MODE_PT | CASDSK_MODE_TRANSITION)
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#define CASDSK_MODE_TRANS_TO_PT (CASDSK_MODE_ATTACHED | \
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CASDSK_MODE_TRANSITION)
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#define CASDSK_MODE_TRANS_TO_SHUTDOWN (CASDSK_MODE_SHUTDOWN | \
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CASDSK_MODE_TRANSITION)
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struct casdsk_disk {
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uint32_t id;
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atomic_t mode;
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char *path;
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struct mutex lock;
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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 casdsk_exp_obj *exp_obj;
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struct kobject kobj;
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struct list_head list;
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void *private;
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};
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int __init casdsk_init_disks(void);
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void casdsk_deinit_disks(void);
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void __exit casdsk_disk_shutdown_all(void);
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int casdsk_disk_allocate_minors(int count);
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static inline void casdsk_disk_lock(struct casdsk_disk *dsk)
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{
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mutex_lock(&dsk->lock);
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}
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static inline void casdsk_disk_unlock(struct casdsk_disk *dsk)
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{
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mutex_unlock(&dsk->lock);
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}
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static inline struct casdsk_disk *casdsk_kobj_to_disk(struct kobject *kobj)
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{
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return container_of(kobj, struct casdsk_disk, kobj);
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}
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static inline bool casdsk_disk_in_transition(struct casdsk_disk *dsk)
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{
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return (atomic_read(&dsk->mode) & CASDSK_MODE_TRANSITION) ==
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CASDSK_MODE_TRANSITION;
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}
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static inline bool casdsk_disk_is_attached(struct casdsk_disk *dsk)
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{
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return (atomic_read(&dsk->mode) & CASDSK_MODE_ATTACHED) ==
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CASDSK_MODE_ATTACHED;
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}
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static inline bool casdsk_disk_is_pt(struct casdsk_disk *dsk)
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{
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return (atomic_read(&dsk->mode) & CASDSK_MODE_PT) == CASDSK_MODE_PT;
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}
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static inline bool casdsk_disk_is_shutdown(struct casdsk_disk *dsk)
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{
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return (atomic_read(&dsk->mode) & CASDSK_MODE_SHUTDOWN) ==
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CASDSK_MODE_SHUTDOWN;
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}
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static inline bool casdsk_disk_is_unknown(struct casdsk_disk *dsk)
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{
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return atomic_read(&dsk->mode) == CASDSK_MODE_UNKNOWN;
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}
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#endif
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