[RFC PATCH v3 13/19] scsi: scsi_debug: Add param to control target based error handle

[JiangJianJun]

From: Wenchao Hao <haowenchao2@xxxxxxxxxx>

Add new module param target_eh to control if enable target based error
handler, and param target_eh_fallback to control if fallback to further
recover when target recovery can not recover all error commands.
This is used to test the target based error handle.

Signed-off-by: Wenchao Hao <haowenchao2@xxxxxxxxxx>
---
 drivers/scsi/scsi_debug.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 162728cca99d..5c0c2529b865 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -886,6 +886,8 @@ static bool sdebug_wp;
 static bool sdebug_allow_restart;
 static bool sdebug_lun_eh;
 static bool sdebug_lun_eh_fallback;
+static bool sdebug_target_eh;
+static bool sdebug_target_eh_fallback;
 static enum {
 	BLK_ZONED_NONE	= 0,
 	BLK_ZONED_HA	= 1,
@@ -1195,6 +1197,9 @@ static int sdebug_target_alloc(struct scsi_target *starget)
 
 	starget->hostdata = targetip;
 
+	if (sdebug_target_eh)
+		return scsi_target_setup_eh(starget, sdebug_target_eh_fallback);
+
 	return 0;
 }
 
@@ -1210,6 +1215,9 @@ static void sdebug_target_destroy(struct scsi_target *starget)
 {
 	struct sdebug_target_info *targetip;
 
+	if (sdebug_target_eh)
+		scsi_target_clear_eh(starget);
+
 	targetip = (struct sdebug_target_info *)starget->hostdata;
 	if (targetip) {
 		starget->hostdata = NULL;
@@ -6654,6 +6662,8 @@ module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
 module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
 module_param_named(lun_eh, sdebug_lun_eh, bool, S_IRUGO);
 module_param_named(lun_eh_fallback, sdebug_lun_eh_fallback, bool, S_IRUGO);
+module_param_named(target_eh, sdebug_target_eh, bool, S_IRUGO);
+module_param_named(target_eh_fallback, sdebug_target_eh_fallback, bool, S_IRUGO);
 
 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
 MODULE_DESCRIPTION("SCSI debug adapter driver");
@@ -6735,6 +6745,8 @@ MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
 MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
 MODULE_PARM_DESC(lun_eh, "LUN based error handle (def=0)");
 MODULE_PARM_DESC(lun_eh_fallback, "Fallback to further recovery if LUN recovery failed (def=0)");
+MODULE_PARM_DESC(target_eh, "target based error handle (def=0)");
+MODULE_PARM_DESC(target_eh_fallback, "Fallback to further recovery if target recovery failed (def=0)");
 
 #define SDEBUG_INFO_LEN 256
 static char sdebug_info[SDEBUG_INFO_LEN];
-- 
2.33.0