mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Mike Christie](/assets/img/avatar_default.png)
If a PR operation fails we can return a device-specific error which is impossible to handle in some cases because we could have a mix of devices when DM is used, or future users like LIO only knows it's interacting with a block device so it doesn't know the type. This patch adds a new pr_status enum so drivers can convert errors to a common type which can be handled by the caller. Signed-off-by: Mike Christie <michael.christie@oracle.com> Link: https://lore.kernel.org/r/20221122032603.32766-2-michael.christie@oracle.com Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef _UAPI_PR_H
|
|
#define _UAPI_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 /* _UAPI_PR_H */
|