tcm_loop: Implement target reset

Implement target reset by resetting the transport status.

(nab: Remove unused ret in tcm_loop_target_reset)

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 04811caac487..1b41e6776152 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -392,6 +392,31 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc)
         return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED;
 }
 
+static int tcm_loop_target_reset(struct scsi_cmnd *sc)
+{
+        struct tcm_loop_hba *tl_hba;
+        struct tcm_loop_tpg *tl_tpg;
+
+        /*
+         * Locate the tcm_loop_hba_t pointer
+         */
+        tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
+        if (!tl_hba) {
+                pr_err("Unable to perform device reset without"
+                                " active I_T Nexus\n");
+                return FAILED;
+        }
+        /*
+         * Locate the tl_tpg pointer from TargetID in sc->device->id
+         */
+        tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+        if (tl_tpg) {
+                tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE;
+                return SUCCESS;
+        }
+        return FAILED;
+}
+
 static int tcm_loop_slave_alloc(struct scsi_device *sd)
 {
         set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags);
@@ -421,6 +446,7 @@ static struct scsi_host_template tcm_loop_driver_template = {
         .change_queue_type      = tcm_loop_change_queue_type,
         .eh_abort_handler = tcm_loop_abort_task,
         .eh_device_reset_handler = tcm_loop_device_reset,
+        .eh_target_reset_handler = tcm_loop_target_reset,
         .can_queue              = 1024,
         .this_id                = -1,
         .sg_tablesize           = 256,