This patch added a function tcmu_execute_pr_register_new() which
can help to register an unregistered I_T Nexus.
Signed-off-by: Zhu Lingshan <lszhu@xxxxxxxx>
---
drivers/target/target_core_user.c | 34 +++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 291b3ff4555d..5d0da54072cd 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -2505,6 +2505,40 @@ static int tcmu_pr_info_append_reg(struct tcmu_pr_info *pr_info,
return 0;
}
+/* handle PR registration for a currently unregistered I_T nexus */
+static sense_reason_t
+tcmu_execute_pr_register_new(struct tcmu_pr_info *pr_info, u64 old_key,
+ u64 new_key, char *it_nexus,
+ bool ignore_existing)
+{
+ sense_reason_t ret;
+ int rc;
+
+ pr_debug("PR registration for unregistered nexus: %s\n", it_nexus);
+ if (!ignore_existing && (old_key != 0)) {
+ ret = TCM_RESERVATION_CONFLICT;
+ goto out;
+ }
+ if (new_key == 0) {
+ ret = TCM_NO_SENSE;
+ goto out;
+ }
+ /*
+ * Register the I_T nexus on which the command was received with
+ * the value specified in the SERVICE ACTION RESERVATION KEY
+ * field.
+ */
+ rc = tcmu_pr_info_append_reg(pr_info, it_nexus, new_key);
+ if (rc < 0) {
+ ret = TCM_OUT_OF_RESOURCES;
+ goto out;
+ }
+
+ ret = TCM_NO_SENSE;
+out:
+ return ret;
+}
+
static int tcmu_configure_device(struct se_device *dev)
{
struct tcmu_dev *udev = TCMU_DEV(dev);
--
2.17.1
