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From:   Naohiro Aota <naohiro.aota@wdc.com>
To:     linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>
Cc:     Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
        Qu Wenruo <wqu@suse.com>, Nikolay Borisov <nborisov@suse.com>,
        linux-kernel@vger.kernel.org, Hannes Reinecke <hare@suse.com>,
        linux-fsdevel@vger.kernel.org,
        Damien Le Moal <damien.lemoal@wdc.com>,
        =?UTF-8?q?Matias=20Bj=C3=B8rling?= <mb@lightnvm.io>,
        Johannes Thumshirn <jthumshirn@suse.de>,
        Bart Van Assche <bvanassche@acm.org>,
        Naohiro Aota <naohiro.aota@wdc.com>
Subject: [PATCH 01/12] btrfs-progs: build: Check zoned block device support
Date:   Fri,  7 Jun 2019 22:17:40 +0900
Message-Id: <20190607131751.5359-1-naohiro.aota@wdc.com>
In-Reply-To: <20190607131025.31996-1-naohiro.aota@wdc.com>
References: <20190607131025.31996-1-naohiro.aota@wdc.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

If the kernel supports zoned block devices, the file
/usr/include/linux/blkzoned.h will be present. Check this and define
BTRFS_ZONED if the file is present.

If it present, enables HMZONED feature, if not disable it.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 configure.ac | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/configure.ac b/configure.ac
index cf792eb5488b..c637f72a8fe6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -206,6 +206,18 @@ else
 AC_DEFINE([HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE], [0], [We did not define FIEMAP_EXTENT_SHARED])
 fi
 
+AC_CHECK_HEADER(linux/blkzoned.h, [blkzoned_found=yes], [blkzoned_found=no])
+AC_ARG_ENABLE([zoned],
+  AS_HELP_STRING([--disable-zoned], [disable zoned block device support]),
+  [], [enable_zoned=$blkzoned_found]
+)
+
+AS_IF([test "x$enable_zoned" = xyes], [
+	AC_CHECK_HEADER(linux/blkzoned.h, [],
+		[AC_MSG_ERROR([Couldn't find linux/blkzoned.h])])
+	AC_DEFINE([BTRFS_ZONED], [1], [enable zoned block device support])
+])
+
 dnl Define <NAME>_LIBS= and <NAME>_CFLAGS= by pkg-config
 dnl
 dnl The default PKG_CHECK_MODULES() action-if-not-found is end the
@@ -307,6 +319,7 @@ AC_MSG_RESULT([
 	btrfs-restore zstd: ${enable_zstd}
 	Python bindings:    ${enable_python}
 	Python interpreter: ${PYTHON}
+	zoned device:       ${enable_zoned}
 
 	Type 'make' to compile.
 ])
-- 
2.21.0