linux-kernel - [RFC] IB/srp: export reset-host via sysfs

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Date:   Tue,  4 Oct 2016 16:00:09 +0200
From:   Gioh Kim <gi-oh.kim@...fitbricks.com>
To:     bart.vanassche@...disk.com, dledford@...hat.com,
        sean.hefty@...el.com, hal.rosenstock@...il.com
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Gioh Kim <gi-oh.kim@...fitbricks.com>
Subject: [RFC] IB/srp: export reset-host via sysfs

Standard SCSI device has host_reset sysfs interface.
This patch exports the host_reset interface for upper layer.

Signed-off-by: Gioh Kim <gi-oh.kim@...fitbricks.com>
---
 drivers/infiniband/ulp/srp/ib_srp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 3322ed7..92e6c3f 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -2628,6 +2628,15 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
 	return SUCCESS;
 }
 
+static int srp_scsi_host_reset(struct Scsi_Host *shost, int reset_type)
+{
+	struct srp_target_port *target = host_to_target(shost);
+
+	shost_printk(KERN_EMERG, target->scsi_host, PFX "SRP reset_host called\n");
+
+	return srp_reconnect_rport(target->rport);
+}
+
 static int srp_reset_host(struct scsi_cmnd *scmnd)
 {
 	struct srp_target_port *target = host_to_target(scmnd->device->host);
@@ -2858,6 +2867,7 @@ static struct scsi_host_template srp_template = {
 	.use_clustering			= ENABLE_CLUSTERING,
 	.shost_attrs			= srp_host_attrs,
 	.track_queue_depth		= 1,
+	.host_reset			= srp_scsi_host_reset,
 };
 
 static int srp_sdev_count(struct Scsi_Host *host)
-- 
2.5.0