From a90e5a3d4cef44db92760f4d5eff0ccb8a24b561 Mon Sep 17 00:00:00 2001
From: David Disseldorp <ddiss@suse.de>
Date: Fri, 18 Sep 2015 17:58:42 +0200
Subject: [PATCH] test/iscsi-support: PR Out CLEAR helper function

Add a helper function to dispatch Persistent Reserve Out requests with
CLEAR service action.

Signed-off-by: David Disseldorp <ddiss@suse.de>
---
 test-tool/iscsi-support.c | 49 +++++++++++++++++++++++++++++++++++++++
 test-tool/iscsi-support.h |  1 +
 2 files changed, 50 insertions(+)

diff --git a/test-tool/iscsi-support.c b/test-tool/iscsi-support.c
index 42e0e18..ce11612 100644
--- a/test-tool/iscsi-support.c
+++ b/test-tool/iscsi-support.c
@@ -973,6 +973,55 @@ prout_release(struct scsi_device *sdev,
 	return ret;
 }
 
+int
+prout_clear(struct scsi_device *sdev, unsigned long long key)
+{
+	struct scsi_persistent_reserve_out_basic poc;
+	struct scsi_task *task;
+	int ret = 0;
+
+	/* reserve the target using specified reservation type */
+	logging(LOG_VERBOSE,
+		"Send PROUT/CLEAR to clear all registrations and any PR "
+		"reservation");
+
+	if (!data_loss) {
+		printf("--dataloss flag is not set in. Skipping PROUT\n");
+		return -1;
+	}
+
+	memset(&poc, 0, sizeof (poc));
+	poc.reservation_key = key;
+	task = scsi_cdb_persistent_reserve_out(
+	    SCSI_PERSISTENT_RESERVE_CLEAR,
+	    SCSI_PERSISTENT_RESERVE_SCOPE_LU,
+	    0, &poc);
+	assert(task != NULL);
+
+	task = send_scsi_command(sdev, task, NULL);
+	if (task == NULL) {
+		logging(LOG_NORMAL,
+		    "[FAILED] Failed to send PROUT command: %s",
+		    iscsi_get_error(sdev->iscsi_ctx));
+		return -1;
+	}
+	if (status_is_invalid_opcode(task)) {
+		scsi_free_scsi_task(task);
+		logging(LOG_NORMAL, "[SKIPPED] PERSISTENT RESERVE OUT is not implemented.");
+		return -2;
+	}
+
+	if (task->status != SCSI_STATUS_GOOD) {
+		logging(LOG_NORMAL,
+		    "[FAILED] PROUT command: failed with sense. %s",
+		    iscsi_get_error(sdev->iscsi_ctx));
+		ret = -1;
+	}
+
+	scsi_free_scsi_task(task);
+	return ret;
+}
+
 int
 prin_verify_reserved_as(struct scsi_device *sdev,
     unsigned long long key, enum scsi_persistent_out_type pr_type)
diff --git a/test-tool/iscsi-support.h b/test-tool/iscsi-support.h
index 1e55d70..4c43b14 100644
--- a/test-tool/iscsi-support.h
+++ b/test-tool/iscsi-support.h
@@ -273,6 +273,7 @@ int prout_reserve(struct scsi_device *sdev,
     unsigned long long key, enum scsi_persistent_out_type pr_type);
 int prout_release(struct scsi_device *sdev,
     unsigned long long key, enum scsi_persistent_out_type pr_type);
+int prout_clear(struct scsi_device *sdev, unsigned long long key);
 int prin_verify_not_reserved(struct scsi_device *sdev);
 int prin_verify_reserved_as(struct scsi_device *sdev,
     unsigned long long key, enum scsi_persistent_out_type pr_type);