1 files changed, 67 insertions, 2 deletions
diff --git a/plugins/ocp/ocp-utils.c b/plugins/ocp/ocp-utils.c
index 9294c05..a37a58c 100644
--- a/plugins/ocp/ocp-utils.c
+++ b/plugins/ocp/ocp-utils.c
@@ -5,11 +5,13 @@
  * Author: leonardo.da.cunha@solidigm.com
  */
 
+#include <unistd.h>
 #include "ocp-utils.h"
+#include "nvme-print.h"
 
 const unsigned char ocp_uuid[NVME_UUID_LEN] = {
-	0x6f, 0xbe, 0x56, 0x8f, 0x99, 0x29, 0x1d, 0xa2, 0x94, 0x47,
-	0x94, 0xe0, 0x5b, 0xd5, 0x94, 0xc1 };
+	0xc1, 0x94, 0xd5, 0x5b, 0xe0, 0x94, 0x47, 0x94, 0xa2, 0x1d,
+	0x29, 0x99, 0x8f, 0x56, 0xbe, 0x6f };
 
 int ocp_get_uuid_index(struct nvme_dev *dev, int *index)
 {
@@ -28,3 +30,66 @@ int ocp_get_uuid_index(struct nvme_dev *dev, int *index)
 	}
 	return err;
 }
+
+int ocp_clear_feature(int argc, char **argv, const char *desc, const __u8 fid)
+{
+	__u32 result = 0;
+	__u32 clear = 1 << 31;
+	struct nvme_dev *dev;
+	int uuid_index = 0;
+	bool uuid = true;
+	int err;
+
+	OPT_ARGS(opts) = {
+		OPT_FLAG("no-uuid", 'n', NULL,
+			 "Skip UUID index search (UUID index not required for OCP 1.0)"),
+		OPT_END()
+	};
+
+	err = parse_and_open(&dev, argc, argv, desc, opts);
+	if (err)
+		return err;
+
+	if (opts[0].seen)
+		uuid = false;
+
+	if (uuid) {
+		/* OCP 2.0 requires UUID index support */
+		err = ocp_get_uuid_index(dev, &uuid_index);
+		if (err || !uuid_index) {
+			fprintf(stderr, "ERROR: No OCP UUID index found\n");
+			goto close_dev;
+		}
+	}
+
+	struct nvme_set_features_args args = {
+		.result = &result,
+		.data = NULL,
+		.args_size = sizeof(args),
+		.fd = dev_fd(dev),
+		.timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+		.nsid = 0,
+		.cdw11 = clear,
+		.cdw12 = 0,
+		.cdw13 = 0,
+		.cdw15 = 0,
+		.data_len = 0,
+		.save = 0,
+		.uuidx = uuid_index,
+		.fid = fid,
+	};
+
+	err = nvme_set_features(&args);
+
+	if (err == 0)
+		printf("Success : %s\n", desc);
+	else if (err > 0)
+		nvme_show_status(err);
+	else
+		printf("Fail : %s\n", desc);
+close_dev:
+	/* Redundant close() to make static code analysis happy */
+	close(dev->direct.fd);
+	dev_close(dev);
+	return err;
+}