From b95de9a3ca677a06865bf3310af04e91e45f562d Mon Sep 17 00:00:00 2001
From: Maciej Szwed <maciej.szwed@intel.com>
Date: Fri, 13 Dec 2019 12:31:19 +0100
Subject: [PATCH] nvme: Add SPDK_NVME_NS_COMPARE_SUPPORTED flag

Signed-off-by: Maciej Szwed <maciej.szwed@intel.com>
Change-Id: I24d09cbe21cd2694b4c3433a365dffe75cda2fa8

Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/477924
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
---
 include/spdk/nvme.h | 1 +
 lib/nvme/nvme_ns.c  | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/include/spdk/nvme.h b/include/spdk/nvme.h
index 84b692fbc..1180e7fdc 100644
--- a/include/spdk/nvme.h
+++ b/include/spdk/nvme.h
@@ -1937,6 +1937,7 @@ enum spdk_nvme_ns_flags {
 							      metadata is transferred as a contiguous
 							      part of the logical block that it is associated with */
 	SPDK_NVME_NS_WRITE_UNCORRECTABLE_SUPPORTED	= 0x40, /**< The write uncorrectable command is supported */
+	SPDK_NVME_NS_COMPARE_SUPPORTED		= 0x80, /**< The compare command is supported */
 };
 
 /**
diff --git a/lib/nvme/nvme_ns.c b/lib/nvme/nvme_ns.c
index b6b6bc58b..095f0829a 100644
--- a/lib/nvme/nvme_ns.c
+++ b/lib/nvme/nvme_ns.c
@@ -83,6 +83,10 @@ nvme_ns_set_identify_data(struct spdk_nvme_ns *ns)
 		ns->flags |= SPDK_NVME_NS_DEALLOCATE_SUPPORTED;
 	}
 
+	if (ns->ctrlr->cdata.oncs.compare) {
+		ns->flags |= SPDK_NVME_NS_COMPARE_SUPPORTED;
+	}
+
 	if (ns->ctrlr->cdata.vwc.present) {
 		ns->flags |= SPDK_NVME_NS_FLUSH_SUPPORTED;
 	}