From: deshmukh <deshmukh>
Date: Tue, 1 Dec 2009 12:57:45 +0000 (+0000)
Subject: b=20655
X-Git-Tag: GIT_EPOCH_B_HD_KDMU~45
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=94d4792f303c7ecaf81ee037579c27cacc1eb717;hp=d721e68a4f81dd3e74084eae4d2a32bdacffb40b

b=20655
i=robert.read
i=sheng.yang

With this patch, ldiskfs will be ext4 by default on HEAD for RHEL5. To disable ext4 i.e.
to build ext3 ldiskfs --disable-ext4 configure option needs to be given.

There is no change for b1_8.
---

diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index 610519f..b85f5d5 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -246,6 +246,46 @@ fi
 AC_CONFIG_SUBDIRS(ldiskfs)
 ])
 
+AC_DEFUN([LC_KERNEL_WITH_EXT4],
+[if test -f $LINUX/fs/ext4/ext4.h ; then
+$1
+else
+$2
+fi
+])
+
+#
+# LB_HAVE_EXT4_ENABLED
+#
+AC_DEFUN([LB_HAVE_EXT4_ENABLED],
+[
+if test x$RHEL_KERNEL = xyes; then
+	AC_ARG_ENABLE([ext4],
+		 AC_HELP_STRING([--enable-ext4],
+				[enable building of ldiskfs based on ext4]),
+		[],
+		[
+			if test x$ldiskfs_is_ext4 = xyes; then
+				enable_ext4=yes
+			else
+				enable_ext4=no
+			fi
+		])
+else
+	case $LINUXRELEASE in
+	# ext4 was in 2.6.22-2.6.26 but not stable enough to use
+	2.6.2[0-6]*) enable_ext4='no' ;;
+	*)  LC_KERNEL_WITH_EXT4([enable_ext4='yes'],
+				[enable_ext4='no']) ;;
+	esac
+fi
+if test x$enable_ext4 = xyes; then
+	 ac_configure_args="$ac_configure_args --enable-ext4"
+fi
+AC_MSG_CHECKING([whether to build ldiskfs based on ext4])
+AC_MSG_RESULT([$enable_ext4])
+])
+
 # Define no libcfs by default.
 AC_DEFUN([LB_LIBCFS_DIR],
 [
@@ -873,8 +913,8 @@ LN_CONFIG_CDEBUG
 LC_QUOTA
 
 LB_CONFIG_MODULES
-
 LN_CONFIG_USERSPACE
+LB_HAVE_EXT4_ENABLED
 
 LB_PATH_DMU
 LB_PATH_LIBSYSIO
diff --git a/ldiskfs/configure.ac b/ldiskfs/configure.ac
index 70a5d22..6644fe5 100644
--- a/ldiskfs/configure.ac
+++ b/ldiskfs/configure.ac
@@ -33,13 +33,6 @@ $2
 esac
 ])
 
-AC_DEFUN([LC_KERNEL_WITH_EXT4],
-[if test -f $LINUX/fs/ext4/ext4.h ; then
-$1
-else
-$2
-fi
-])
 
 AC_MSG_CHECKING([whether to build kernel modules])
 AC_ARG_ENABLE([modules],
@@ -90,22 +83,6 @@ AM_CONDITIONAL(USE_QUILT, test x$QUILT != xno)
 
 LB_DEFINE_LDISKFS_OPTIONS
 
-AC_MSG_CHECKING([whether to build ldiskfs based on ext4])
-if test x$RHEL_KERNEL = xyes; then
-	AC_ARG_ENABLE([ext4],
-		AC_HELP_STRING([--enable-ext4],
-			     [enable building of ldiskfs based on ext4]),
-			     [], [enable_ext4='no'])
-else
-	case $LINUXRELEASE in
-	# ext4 was in 2.6.22-2.6.26 but not stable enough to use
-	2.6.2[0-6]*) enable_ext4='no' ;;
-	*) LC_KERNEL_WITH_EXT4([enable_ext4='yes'],
-			       [enable_ext4='no']) ;;
-	esac
-fi
-AC_MSG_RESULT([$enable_ext4])
-
 if test x$enable_ext4 = xyes ; then
 	AC_DEFINE(HAVE_EXT4_LDISKFS, 1, [ldiskfs based on ext4])
 	BACKFS=ext4
diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index edca74d..11e6569 100644
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -8,6 +8,7 @@
 AC_DEFUN([LC_CONFIG_SRCDIR],
 [AC_CONFIG_SRCDIR([lustre/obdclass/obdo.c])
 libcfs_is_module=yes
+ldiskfs_is_ext4=yes
 ])
 
 #