From 255c4f4a6d5b60cfcd218d8fdae517b886ff155a Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Mon, 21 Nov 2022 21:26:00 -0600 Subject: 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 Link: https://lore.kernel.org/r/20221122032603.32766-2-michael.christie@oracle.com Reviewed-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Signed-off-by: Martin K. Petersen --- include/uapi/linux/pr.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/uapi') 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 +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, -- cgit v1.2.3