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scsi-disk: Add support for retry on errors

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Mark failed requests as to be retried and implement retry_request_cb to
handle these requests.

Signed-off-by: Jiahui Cen <cenjiahui(a)huawei.com>
Signed-off-by: Ying Fang <fangying1(a)huawei.com>
This commit is contained in:
Huawei Technologies Co., Ltd 2021-01-21 15:46:55 +08:00 committed by Euler Robot
parent 88c646e68d
commit 06391f3674
1 changed files with 76 additions and 0 deletions
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76
scsi-disk-Add-support-for-retry-on-errors.patch Normal file
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@ -0,0 +1,76 @@
From 34f1552a6d7e05f2f2146ebc6d50deb2de7e5fd4 Mon Sep 17 00:00:00 2001
From: Jiahui Cen <cenjiahui@huawei.com>
Date: Thu, 21 Jan 2021 15:46:55 +0800
Subject: [PATCH] scsi-disk: Add support for retry on errors
Mark failed requests as to be retried and implement retry_request_cb to
handle these requests.
Signed-off-by: Jiahui Cen <cenjiahui(a)huawei.com>
Signed-off-by: Ying Fang <fangying1(a)huawei.com>
---
hw/scsi/scsi-disk.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index cd90cd780e..93fdd913fe 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -184,6 +184,8 @@ static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed)
{
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+
if (r->req.io_canceled) {
scsi_req_cancel_complete(&r->req);
return true;
@@ -193,6 +195,7 @@ static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed)
return scsi_handle_rw_error(r, -ret, acct_failed);
}
+ blk_error_retry_reset_timeout(s->qdev.conf.blk);
return false;
}
@@ -480,6 +483,10 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
}
}
+ if (action == BLOCK_ERROR_ACTION_RETRY) {
+ scsi_req_retry(&r->req);
+ }
+
blk_error_action(s->qdev.conf.blk, action, is_read, error);
if (action == BLOCK_ERROR_ACTION_IGNORE) {
scsi_req_complete(&r->req, 0);
@@ -2252,6 +2259,13 @@ static void scsi_disk_resize_cb(void *opaque)
}
}
+static void scsi_disk_retry_request(void *opaque)
+{
+ SCSIDiskState *s = opaque;
+
+ scsi_retry_requests(&s->qdev);
+}
+
static void scsi_cd_change_media_cb(void *opaque, bool load, Error **errp)
{
SCSIDiskState *s = opaque;
@@ -2300,10 +2314,12 @@ static const BlockDevOps scsi_disk_removable_block_ops = {
.is_medium_locked = scsi_cd_is_medium_locked,
.resize_cb = scsi_disk_resize_cb,
+ .retry_request_cb = scsi_disk_retry_request,
};
static const BlockDevOps scsi_disk_block_ops = {
.resize_cb = scsi_disk_resize_cb,
+ .retry_request_cb = scsi_disk_retry_request,
};
static void scsi_disk_unit_attention_reported(SCSIDevice *dev)
--
2.27.0