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qemu-kvm/kvm-scsi-introduce-scsi_sense_from_errno.patch
Miroslav Rezanina 384b680e84 Synchronization with qemu-kvm-5.2.0-14.el8
2021-03-22 07:55:49 +01:00

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From 38a29a168f4b377eb6381469af16887e12ebfa3d Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 8 Mar 2021 10:49:00 -0500
Subject: [PATCH 03/15] scsi: introduce scsi_sense_from_errno()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Paolo Bonzini <pbonzini@redhat.com>
Message-id: <20210308104902.149906-4-pbonzini@redhat.com>
Patchwork-id: 101308
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 3/5] scsi: introduce scsi_sense_from_errno()
Bugzilla: 1927530
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
The new function is an extension of the switch statement in scsi-disk.c
which also includes the errno cases only found in sg_io_sense_from_errno.
This allows us to consolidate the errno handling.
Extracted from a patch by Hannes Reinecke <hare@suse.de>.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit d7a84021db8eeddcd5d24ab591a1434763caff6c)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
hw/scsi/scsi-disk.c | 45 +++++++-------------------------------
include/scsi/utils.h | 2 ++
scsi/utils.c | 51 +++++++++++++++++++++++++++++++++++---------
3 files changed, 51 insertions(+), 47 deletions(-)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index e8de15f549..7393f33ee2 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -193,13 +193,13 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
is_read, error);
+ SCSISense sense;
if (action == BLOCK_ERROR_ACTION_REPORT) {
if (acct_failed) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
}
- switch (error) {
- case 0:
+ if (error == 0) {
/* A passthrough command has run and has produced sense data; check
* whether the error has to be handled by the guest or should rather
* pause the host.
@@ -212,41 +212,12 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
return true;
}
error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
- break;
-#ifdef CONFIG_LINUX
- /* These errno mapping are specific to Linux. For more information:
- * - scsi_decide_disposition in drivers/scsi/scsi_error.c
- * - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
- * - blk_errors[] in block/blk-core.c
- */
- case EBADE:
- /* DID_NEXUS_FAILURE -> BLK_STS_NEXUS. */
- scsi_req_complete(&r->req, RESERVATION_CONFLICT);
- break;
- case ENODATA:
- /* DID_MEDIUM_ERROR -> BLK_STS_MEDIUM. */
- scsi_check_condition(r, SENSE_CODE(READ_ERROR));
- break;
- case EREMOTEIO:
- /* DID_TARGET_FAILURE -> BLK_STS_TARGET. */
- scsi_req_complete(&r->req, HARDWARE_ERROR);
- break;
-#endif
- case ENOMEDIUM:
- scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
- break;
- case ENOMEM:
- scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
- break;
- case EINVAL:
- scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
- break;
- case ENOSPC:
- scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED));
- break;
- default:
- scsi_check_condition(r, SENSE_CODE(IO_ERROR));
- break;
+ } else {
+ int status = scsi_sense_from_errno(error, &sense);
+ if (status == CHECK_CONDITION) {
+ scsi_req_build_sense(&r->req, sense);
+ }
+ scsi_req_complete(&r->req, status);
}
}
diff --git a/include/scsi/utils.h b/include/scsi/utils.h
index fbc5588279..878434a8f5 100644
--- a/include/scsi/utils.h
+++ b/include/scsi/utils.h
@@ -133,4 +133,6 @@ int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
SCSISense *sense);
#endif
+int scsi_sense_from_errno(int errno_value, SCSISense *sense);
+
#endif
diff --git a/scsi/utils.c b/scsi/utils.c
index b37c283014..c93458b80e 100644
--- a/scsi/utils.c
+++ b/scsi/utils.c
@@ -560,21 +560,52 @@ const char *scsi_command_name(uint8_t cmd)
return names[cmd];
}
+int scsi_sense_from_errno(int errno_value, SCSISense *sense)
+{
+ switch (errno_value) {
+ case 0:
+ return GOOD;
+ case EDOM:
+ return TASK_SET_FULL;
+#ifdef CONFIG_LINUX
+ /* These errno mapping are specific to Linux. For more information:
+ * - scsi_decide_disposition in drivers/scsi/scsi_error.c
+ * - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
+ * - blk_errors[] in block/blk-core.c
+ */
+ case EBADE:
+ return RESERVATION_CONFLICT;
+ case ENODATA:
+ *sense = SENSE_CODE(READ_ERROR);
+ return CHECK_CONDITION;
+ case EREMOTEIO:
+ *sense = SENSE_CODE(LUN_COMM_FAILURE);
+ return CHECK_CONDITION;
+#endif
+ case ENOMEDIUM:
+ *sense = SENSE_CODE(NO_MEDIUM);
+ return CHECK_CONDITION;
+ case ENOMEM:
+ *sense = SENSE_CODE(TARGET_FAILURE);
+ return CHECK_CONDITION;
+ case EINVAL:
+ *sense = SENSE_CODE(INVALID_FIELD);
+ return CHECK_CONDITION;
+ case ENOSPC:
+ *sense = SENSE_CODE(SPACE_ALLOC_FAILED);
+ return CHECK_CONDITION;
+ default:
+ *sense = SENSE_CODE(IO_ERROR);
+ return CHECK_CONDITION;
+ }
+}
+
#ifdef CONFIG_LINUX
int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
SCSISense *sense)
{
if (errno_value != 0) {
- switch (errno_value) {
- case EDOM:
- return TASK_SET_FULL;
- case ENOMEM:
- *sense = SENSE_CODE(TARGET_FAILURE);
- return CHECK_CONDITION;
- default:
- *sense = SENSE_CODE(IO_ERROR);
- return CHECK_CONDITION;
- }
+ return scsi_sense_from_errno(errno_value, sense);
} else {
if (io_hdr->host_status == SG_ERR_DID_NO_CONNECT ||
io_hdr->host_status == SG_ERR_DID_BUS_BUSY ||
--
2.27.0
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