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| author | Mike Christie <michael.christie@oracle.com> | 2022-11-21 21:26:00 -0600 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-12-01 03:22:20 +0000 |
| commit | 255c4f4a6d5b60cfcd218d8fdae517b886ff155a (patch) | |
| tree | 588ab88be07a968c90cf869bf66b5227a12a2743 /include/uapi | |
| parent | 9f5436f47c58463f91bfeebcc4613138625098c2 (diff) | |
| download | lwn-255c4f4a6d5b60cfcd218d8fdae517b886ff155a.tar.gz lwn-255c4f4a6d5b60cfcd218d8fdae517b886ff155a.zip | |
block: Add error codes for common PR failures
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>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/pr.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/uapi/linux/pr.h b/include/uapi/linux/pr.h index ccc78cbf1221..d8126415966f 100644 --- a/include/uapi/linux/pr.h +++ b/include/uapi/linux/pr.h @@ -4,6 +4,23 @@ #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, |