[PATCH 08/10] scsi: Add mapping for generic SCSI_HOST status to sense codes

[Paolo Bonzini <pbonzini@redhat.com>]

From: Hannes Reinecke <hare@suse.de>

As we don't have a driver-specific mapping (yet) we should provide
for a detailed mapping from host_status to SCSI sense codes.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Message-Id: <20201116184041.60465-6-hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/scsi/utils.h |  1 +
 scsi/utils.c         | 65 +++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/include/scsi/utils.h b/include/scsi/utils.h
index ddb22b56df..9080d65e27 100644
--- a/include/scsi/utils.h
+++ b/include/scsi/utils.h
@@ -145,5 +145,6 @@ int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
 #endif
 
 int scsi_sense_from_errno(int errno_value, SCSISense *sense);
+int scsi_sense_from_host_status(uint8_t host_status, SCSISense *sense);
 
 #endif
diff --git a/scsi/utils.c b/scsi/utils.c
index 4d994b6d56..28eb32746e 100644
--- a/scsi/utils.c
+++ b/scsi/utils.c
@@ -257,6 +257,21 @@ const struct SCSISense sense_code_LUN_COMM_FAILURE = {
     .key = ABORTED_COMMAND, .asc = 0x08, .ascq = 0x00
 };
 
+/* Command aborted, LUN does not respond to selection */
+const struct SCSISense sense_code_LUN_NOT_RESPONDING = {
+    .key = ABORTED_COMMAND, .asc = 0x05, .ascq = 0x00
+};
+
+/* Command aborted, Command Timeout during processing */
+const struct SCSISense sense_code_COMMAND_TIMEOUT = {
+    .key = ABORTED_COMMAND, .asc = 0x2e, .ascq = 0x02
+};
+
+/* Command aborted, Commands cleared by device server */
+const struct SCSISense sense_code_COMMAND_ABORTED = {
+    .key = ABORTED_COMMAND, .asc = 0x2f, .ascq = 0x02
+};
+
 /* Medium Error, Unrecovered read error */
 const struct SCSISense sense_code_READ_ERROR = {
     .key = MEDIUM_ERROR, .asc = 0x11, .ascq = 0x00
@@ -605,6 +620,45 @@ int scsi_sense_from_errno(int errno_value, SCSISense *sense)
     }
 }
 
+int scsi_sense_from_host_status(uint8_t host_status,
+                                SCSISense *sense)
+{
+    switch (host_status) {
+    case SCSI_HOST_NO_LUN:
+        *sense = SENSE_CODE(LUN_NOT_RESPONDING);
+        return CHECK_CONDITION;
+    case SCSI_HOST_BUSY:
+        return BUSY;
+    case SCSI_HOST_TIME_OUT:
+        *sense = SENSE_CODE(COMMAND_TIMEOUT);
+        return CHECK_CONDITION;
+    case SCSI_HOST_BAD_RESPONSE:
+        *sense = SENSE_CODE(LUN_COMM_FAILURE);
+        return CHECK_CONDITION;
+    case SCSI_HOST_ABORTED:
+        *sense = SENSE_CODE(COMMAND_ABORTED);
+        return CHECK_CONDITION;
+    case SCSI_HOST_RESET:
+        *sense = SENSE_CODE(RESET);
+        return CHECK_CONDITION;
+    case SCSI_HOST_TRANSPORT_DISRUPTED:
+        *sense = SENSE_CODE(I_T_NEXUS_LOSS);
+        return CHECK_CONDITION;
+    case SCSI_HOST_TARGET_FAILURE:
+        *sense = SENSE_CODE(TARGET_FAILURE);
+        return CHECK_CONDITION;
+    case SCSI_HOST_RESERVATION_ERROR:
+        return RESERVATION_CONFLICT;
+    case SCSI_HOST_ALLOCATION_FAILURE:
+        *sense = SENSE_CODE(SPACE_ALLOC_FAILED);
+        return CHECK_CONDITION;
+    case SCSI_HOST_MEDIUM_ERROR:
+        *sense = SENSE_CODE(READ_ERROR);
+        return CHECK_CONDITION;
+    }
+    return GOOD;
+}
+
 #ifdef CONFIG_LINUX
 int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
                            SCSISense *sense)
@@ -612,14 +666,11 @@ int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
     if (errno_value != 0) {
         return scsi_sense_from_errno(errno_value, sense);
     } else {
-        if (io_hdr->host_status == SCSI_HOST_NO_LUN ||
-            io_hdr->host_status == SCSI_HOST_BUSY ||
-            io_hdr->host_status == SCSI_HOST_TIME_OUT ||
-            (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT)) {
+        int status = scsi_sense_from_host_status(io_hdr->host_status, sense);
+        if (status) {
+            return status;
+        } else if (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT) {
             return BUSY;
-        } else if (io_hdr->host_status) {
-            *sense = SENSE_CODE(I_T_NEXUS_LOSS);
-            return CHECK_CONDITION;
         } else if (io_hdr->status) {
             return io_hdr->status;
         } else if (io_hdr->driver_status & SG_ERR_DRIVER_SENSE) {
-- 
2.29.2