From 99de60a36f120e1289b3c8dfdd64593319f8ecc4 Mon Sep 17 00:00:00 2001
From: Shuhei Matsumoto <smatsumoto@nvidia.com>
Date: Tue, 13 Dec 2022 21:45:42 +0900
Subject: [PATCH] bdev: Add SPDK_MIN_BDEV_IO_STATUS to allocate array for error
 status

We can allocate an array for error status dynamically via negating
SPDK_MIN_BDEV_IO_STATUS.

Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Change-Id: Id36a92bfaa906b445715c03b69a0fd9a154a49e0
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15898
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
---
 include/spdk/bdev_module.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/spdk/bdev_module.h b/include/spdk/bdev_module.h
index 4bacb3441..61c3c566a 100644
--- a/include/spdk/bdev_module.h
+++ b/include/spdk/bdev_module.h
@@ -267,6 +267,11 @@ enum spdk_bdev_io_status {
 	SPDK_BDEV_IO_STATUS_FAILED = -1,
 	SPDK_BDEV_IO_STATUS_PENDING = 0,
 	SPDK_BDEV_IO_STATUS_SUCCESS = 1,
+
+	/* This may be used as the size of an error status array by negation.
+	 * Hence, this should be updated when adding new error statuses.
+	 */
+	SPDK_MIN_BDEV_IO_STATUS = SPDK_BDEV_IO_STATUS_AIO_ERROR,
 };
 
 struct spdk_bdev_name {