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qemu-kvm/SOURCES/kvm-scsi-clear-unit-attenti...

111 lines
3.9 KiB

From 0a784c45a7b7ee32c36bf86eebb24c8431a89f49 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Wed, 12 Jul 2023 15:43:52 +0200
Subject: [PATCH 03/12] scsi: clear unit attention only for REPORT LUNS
commands
RH-Author: Stefano Garzarella <sgarzare@redhat.com>
RH-MergeRequest: 184: scsi: fix issue with Linux guest and unit attention
RH-Bugzilla: 2176702
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [3/3] 01d5e112ef9ae204d96ceb01b4a453fdb4e8b669 (sgarzarella/qemu-kvm-c-9-s)
scsi_clear_unit_attention() now only handles REPORTED LUNS DATA HAS
CHANGED.
This only happens when we handle REPORT LUNS commands, so let's rename
the function in scsi_clear_reported_luns_changed() and call it only in
scsi_target_emulate_report_luns().
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-ID: <20230712134352.118655-4-sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 2eb5599e8a73e70a9e86a97120818ff95a43a23a)
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
hw/scsi/scsi-bus.c | 34 +++++++++++-----------------------
1 file changed, 11 insertions(+), 23 deletions(-)
diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index cecd26479e..9542410800 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -22,6 +22,7 @@ static char *scsibus_get_fw_dev_path(DeviceState *dev);
static void scsi_req_dequeue(SCSIRequest *req);
static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len);
static void scsi_target_free_buf(SCSIRequest *req);
+static void scsi_clear_reported_luns_changed(SCSIRequest *req);
static int next_scsi_bus;
@@ -518,6 +519,14 @@ static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
/* store the LUN list length */
stl_be_p(&r->buf[0], len - 8);
+
+ /*
+ * If a REPORT LUNS command enters the enabled command state, [...]
+ * the device server shall clear any pending unit attention condition
+ * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
+ */
+ scsi_clear_reported_luns_changed(&r->req);
+
return true;
}
@@ -816,18 +825,10 @@ uint8_t *scsi_req_get_buf(SCSIRequest *req)
return req->ops->get_buf(req);
}
-static void scsi_clear_unit_attention(SCSIRequest *req)
+static void scsi_clear_reported_luns_changed(SCSIRequest *req)
{
SCSISense *ua;
- /*
- * scsi_fetch_unit_attention_sense() already cleaned the unit attention
- * in this case.
- */
- if (req->ops == &reqops_unit_attention) {
- return;
- }
-
if (req->dev->unit_attention.key == UNIT_ATTENTION) {
ua = &req->dev->unit_attention;
} else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
@@ -836,13 +837,7 @@ static void scsi_clear_unit_attention(SCSIRequest *req)
return;
}
- /*
- * If a REPORT LUNS command enters the enabled command state, [...]
- * the device server shall clear any pending unit attention condition
- * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
- */
- if (req->cmd.buf[0] == REPORT_LUNS &&
- ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
+ if (ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq) {
*ua = SENSE_CODE(NO_SENSE);
}
@@ -1528,13 +1523,6 @@ void scsi_req_complete(SCSIRequest *req, int status)
req->dev->sense_is_ua = false;
}
- /*
- * Unit attention state is now stored in the device's sense buffer
- * if the HBA didn't do autosense. Clear the pending unit attention
- * flags.
- */
- scsi_clear_unit_attention(req);
-
scsi_req_ref(req);
scsi_req_dequeue(req);
req->bus->info->complete(req, req->residual);
--
2.39.3