tcm_qla2xxx Add SCSI command jammer/discard capability
This patch introduces support for TCM_QLA2XXX_DEBUG and
associated tcm_qla2xxx_tpg->tpg_attrib.jam_host checking
used to test dropped packets to FC host environments.
Tested by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 675f75b..6643f6f 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -442,6 +442,10 @@
struct se_cmd *se_cmd = &cmd->se_cmd;
struct se_session *se_sess;
struct qla_tgt_sess *sess;
+#ifdef CONFIG_TCM_QLA2XXX_DEBUG
+ struct se_portal_group *se_tpg;
+ struct tcm_qla2xxx_tpg *tpg;
+#endif
int flags = TARGET_SCF_ACK_KREF;
if (bidi)
@@ -462,6 +466,15 @@
return -EINVAL;
}
+#ifdef CONFIG_TCM_QLA2XXX_DEBUG
+ se_tpg = se_sess->se_tpg;
+ tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
+ if (unlikely(tpg->tpg_attrib.jam_host)) {
+ /* return, and dont run target_submit_cmd,discarding command */
+ return 0;
+ }
+#endif
+
cmd->vha->tgt_counters.qla_core_sbt_cmd++;
return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
cmd->unpacked_lun, data_length, fcp_task_attr,
@@ -812,6 +825,9 @@
DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
+#ifdef CONFIG_TCM_QLA2XXX_DEBUG
+DEF_QLA_TPG_ATTRIB(jam_host);
+#endif
static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
&tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
@@ -819,6 +835,9 @@
&tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
&tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
&tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
+#ifdef CONFIG_TCM_QLA2XXX_DEBUG
+ &tcm_qla2xxx_tpg_attrib_attr_jam_host,
+#endif
NULL,
};
@@ -991,6 +1010,7 @@
tpg->tpg_attrib.demo_mode_write_protect = 1;
tpg->tpg_attrib.cache_dynamic_acls = 1;
tpg->tpg_attrib.demo_mode_login_only = 1;
+ tpg->tpg_attrib.jam_host = 0;
ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
if (ret < 0) {