lkml.org 
[lkml]   [2023]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/5] scsi: blocking IO when host is blocked
Date
From: Ye Bin <yebin10@huawei.com>

Unlike recovery state may block other process, blocking IO only
when host is blocked.

Signed-off-by: Ye Bin <yebin10@huawei.com>
---
drivers/scsi/scsi_lib.c | 4 ++++
include/scsi/scsi_host.h | 5 +++++
2 files changed, 9 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index b7c569a42aa4..492487717f41 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1731,6 +1731,10 @@ static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
ret = BLK_STS_OFFLINE;
goto out_dec_target_busy;
}
+
+ if (unlikely(scsi_host_blocked(shost)))
+ goto out_dec_target_busy;
+
if (!scsi_host_queue_ready(q, shost, sdev, cmd))
goto out_dec_target_busy;

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 9e99317b11fa..571321bbb706 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -745,6 +745,11 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
shost->tmf_in_progress;
}

+static inline int scsi_host_blocked(struct Scsi_Host *shost)
+{
+ return shost->shost_state == SHOST_BLOCKED;
+}
+
extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
extern void scsi_flush_work(struct Scsi_Host *);

--
2.31.1
\
 
 \ /
  Last update: 2023-03-27 01:17    [W:0.091 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site