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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _PR_H
#define _PR_H
#include <linux/types.h>
enum pr_status {
PR_STS_SUCCESS = 0x0,
/*
* The following error codes are based on SCSI, because the interface
* was originally created for it and has existing users.
*/
/* Generic device failure. */
PR_STS_IOERR = 0x2,
PR_STS_RESERVATION_CONFLICT = 0x18,
/* Temporary path failure that can be retried. */
PR_STS_RETRY_PATH_FAILURE = 0xe0000,
/* The request was failed due to a fast failure timer. */
PR_STS_PATH_FAST_FAILED = 0xf0000,
/* The path cannot be reached and has been marked as failed. */
PR_STS_PATH_FAILED = 0x10000,
};
enum pr_type {
PR_WRITE_EXCLUSIVE = 1,
PR_EXCLUSIVE_ACCESS = 2,
PR_WRITE_EXCLUSIVE_REG_ONLY = 3,
PR_EXCLUSIVE_ACCESS_REG_ONLY = 4,
PR_WRITE_EXCLUSIVE_ALL_REGS = 5,
PR_EXCLUSIVE_ACCESS_ALL_REGS = 6,
};
struct pr_reservation {
__u64 key;
__u32 type;
__u32 flags;
};
struct pr_registration {
__u64 old_key;
__u64 new_key;
__u32 flags;
__u32 __pad;
};
struct pr_preempt {
__u64 old_key;
__u64 new_key;
__u32 type;
__u32 flags;
};
struct pr_clear {
__u64 key;
__u32 flags;
__u32 __pad;
};
#define PR_FL_IGNORE_KEY (1 << 0) /* ignore existing key */
#define IOC_PR_REGISTER _IOW('p', 200, struct pr_registration)
#define IOC_PR_RESERVE _IOW('p', 201, struct pr_reservation)
#define IOC_PR_RELEASE _IOW('p', 202, struct pr_reservation)
#define IOC_PR_PREEMPT _IOW('p', 203, struct pr_preempt)
#define IOC_PR_PREEMPT_ABORT _IOW('p', 204, struct pr_preempt)
#define IOC_PR_CLEAR _IOW('p', 205, struct pr_clear)
#endif /* _PR_H */