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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPI_PR_H3#define _UAPI_PR_H4 5#include <linux/types.h>6 7enum pr_status {8 PR_STS_SUCCESS = 0x0,9 /*10 * The following error codes are based on SCSI, because the interface11 * was originally created for it and has existing users.12 */13 /* Generic device failure. */14 PR_STS_IOERR = 0x2,15 PR_STS_RESERVATION_CONFLICT = 0x18,16 /* Temporary path failure that can be retried. */17 PR_STS_RETRY_PATH_FAILURE = 0xe0000,18 /* The request was failed due to a fast failure timer. */19 PR_STS_PATH_FAST_FAILED = 0xf0000,20 /* The path cannot be reached and has been marked as failed. */21 PR_STS_PATH_FAILED = 0x10000,22};23 24enum pr_type {25 PR_WRITE_EXCLUSIVE = 1,26 PR_EXCLUSIVE_ACCESS = 2,27 PR_WRITE_EXCLUSIVE_REG_ONLY = 3,28 PR_EXCLUSIVE_ACCESS_REG_ONLY = 4,29 PR_WRITE_EXCLUSIVE_ALL_REGS = 5,30 PR_EXCLUSIVE_ACCESS_ALL_REGS = 6,31};32 33struct pr_reservation {34 __u64 key;35 __u32 type;36 __u32 flags;37};38 39struct pr_registration {40 __u64 old_key;41 __u64 new_key;42 __u32 flags;43 __u32 __pad;44};45 46struct pr_preempt {47 __u64 old_key;48 __u64 new_key;49 __u32 type;50 __u32 flags;51};52 53struct pr_clear {54 __u64 key;55 __u32 flags;56 __u32 __pad;57};58 59#define PR_FL_IGNORE_KEY (1 << 0) /* ignore existing key */60 61#define IOC_PR_REGISTER _IOW('p', 200, struct pr_registration)62#define IOC_PR_RESERVE _IOW('p', 201, struct pr_reservation)63#define IOC_PR_RELEASE _IOW('p', 202, struct pr_reservation)64#define IOC_PR_PREEMPT _IOW('p', 203, struct pr_preempt)65#define IOC_PR_PREEMPT_ABORT _IOW('p', 204, struct pr_preempt)66#define IOC_PR_CLEAR _IOW('p', 205, struct pr_clear)67 68#endif /* _UAPI_PR_H */69