[xen staging] include/public: add command result definitions to vscsiif.h

[patchbot@xxxxxxx]

commit 075817681c2e9cc1d0d9ac51e45f7a7dd86123f6
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Wed Apr 20 10:51:26 2022 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Apr 20 10:51:26 2022 +0200

    include/public: add command result definitions to vscsiif.h
    
    The result field of struct vscsiif_response is lacking a detailed
    definition. Today the Linux kernel internal scsi definitions are being
    used, which is not a sane interface for a PV device driver.
    
    Add macros to change that by using today's values in the XEN namespace.
    
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
 xen/include/public/io/vscsiif.h | 51 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/xen/include/public/io/vscsiif.h b/xen/include/public/io/vscsiif.h
index c9ceb1884d..8553b17cc6 100644
--- a/xen/include/public/io/vscsiif.h
+++ b/xen/include/public/io/vscsiif.h
@@ -315,6 +315,57 @@ struct vscsiif_response {
 };
 typedef struct vscsiif_response vscsiif_response_t;
 
+/* SCSI I/O status from vscsiif_response->rslt */
+#define XEN_VSCSIIF_RSLT_STATUS(x)  ((x) & 0x00ff)
+
+/* Host I/O status from vscsiif_response->rslt */
+#define XEN_VSCSIIF_RSLT_HOST(x)    (((x) & 0x00ff0000) >> 16)
+#define XEN_VSCSIIF_RSLT_HOST_OK                   0
+/* Couldn't connect before timeout */
+#define XEN_VSCSIIF_RSLT_HOST_NO_CONNECT           1
+/* Bus busy through timeout */
+#define XEN_VSCSIIF_RSLT_HOST_BUS_BUSY             2
+/* Timed out for other reason */
+#define XEN_VSCSIIF_RSLT_HOST_TIME_OUT             3
+/* Bad target */
+#define XEN_VSCSIIF_RSLT_HOST_BAD_TARGET           4
+/* Abort for some other reason */
+#define XEN_VSCSIIF_RSLT_HOST_ABORT                5
+/* Parity error */
+#define XEN_VSCSIIF_RSLT_HOST_PARITY               6
+/* Internal error */
+#define XEN_VSCSIIF_RSLT_HOST_ERROR                7
+/* Reset by somebody */
+#define XEN_VSCSIIF_RSLT_HOST_RESET                8
+/* Unexpected interrupt */
+#define XEN_VSCSIIF_RSLT_HOST_BAD_INTR             9
+/* Force command past mid-layer */
+#define XEN_VSCSIIF_RSLT_HOST_PASSTHROUGH         10
+/* Retry requested */
+#define XEN_VSCSIIF_RSLT_HOST_SOFT_ERROR          11
+/* Hidden retry requested */
+#define XEN_VSCSIIF_RSLT_HOST_IMM_RETRY           12
+/* Requeue command requested */
+#define XEN_VSCSIIF_RSLT_HOST_REQUEUE             13
+/* Transport error disrupted I/O */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_DISRUPTED 14
+/* Transport class fastfailed */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFAST  15
+/* Permanent target failure */
+#define XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE      16
+/* Permanent nexus failure on path */
+#define XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE       17
+/* Space allocation on device failed */
+#define XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE       18
+/* Medium error */
+#define XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR        19
+/* Transport marginal errors */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGINAL  20
+
+/* Result values of reset operations */
+#define XEN_VSCSIIF_RSLT_RESET_SUCCESS  0x2002
+#define XEN_VSCSIIF_RSLT_RESET_FAILED   0x2003
+
 DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response);
 
 
--
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