| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | #ifndef _UAPI_PR_H |
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| 3 | #define _UAPI_PR_H |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | enum pr_status { |
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| 8 | PR_STS_SUCCESS = 0x0, |
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| 9 | /* |
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| 10 | * The following error codes are based on SCSI, because the interface |
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| 11 | * was originally created for it and has existing users. |
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| 12 | */ |
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| 13 | /* Generic device failure. */ |
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| 14 | PR_STS_IOERR = 0x2, |
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| 15 | PR_STS_RESERVATION_CONFLICT = 0x18, |
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| 16 | /* Temporary path failure that can be retried. */ |
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| 17 | PR_STS_RETRY_PATH_FAILURE = 0xe0000, |
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| 18 | /* The request was failed due to a fast failure timer. */ |
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| 19 | PR_STS_PATH_FAST_FAILED = 0xf0000, |
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| 20 | /* The path cannot be reached and has been marked as failed. */ |
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| 21 | PR_STS_PATH_FAILED = 0x10000, |
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| 22 | }; |
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| 23 | |
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| 24 | enum pr_type { |
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| 25 | PR_WRITE_EXCLUSIVE = 1, |
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| 26 | PR_EXCLUSIVE_ACCESS = 2, |
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| 27 | PR_WRITE_EXCLUSIVE_REG_ONLY = 3, |
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| 28 | PR_EXCLUSIVE_ACCESS_REG_ONLY = 4, |
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| 29 | PR_WRITE_EXCLUSIVE_ALL_REGS = 5, |
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| 30 | PR_EXCLUSIVE_ACCESS_ALL_REGS = 6, |
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| 31 | }; |
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| 32 | |
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| 33 | struct pr_reservation { |
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| 34 | __u64 key; |
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| 35 | __u32 type; |
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| 36 | __u32 flags; |
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| 37 | }; |
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| 38 | |
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| 39 | struct pr_registration { |
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| 40 | __u64 old_key; |
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| 41 | __u64 new_key; |
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| 42 | __u32 flags; |
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| 43 | __u32 __pad; |
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| 44 | }; |
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| 45 | |
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| 46 | struct pr_preempt { |
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| 47 | __u64 old_key; |
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| 48 | __u64 new_key; |
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| 49 | __u32 type; |
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| 50 | __u32 flags; |
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| 51 | }; |
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| 52 | |
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| 53 | struct pr_clear { |
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| 54 | __u64 key; |
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| 55 | __u32 flags; |
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| 56 | __u32 __pad; |
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| 57 | }; |
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| 58 | |
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| 59 | #define PR_FL_IGNORE_KEY (1 << 0) /* ignore existing key */ |
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| 60 | |
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| 61 | #define IOC_PR_REGISTER _IOW('p', 200, struct pr_registration) |
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| 62 | #define IOC_PR_RESERVE _IOW('p', 201, struct pr_reservation) |
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| 63 | #define IOC_PR_RELEASE _IOW('p', 202, struct pr_reservation) |
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| 64 | #define IOC_PR_PREEMPT _IOW('p', 203, struct pr_preempt) |
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| 65 | #define IOC_PR_PREEMPT_ABORT _IOW('p', 204, struct pr_preempt) |
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| 66 | #define IOC_PR_CLEAR _IOW('p', 205, struct pr_clear) |
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| 67 | |
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| 68 | #endif /* _UAPI_PR_H */ |
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| 69 | |
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