From e8681e9929048cf87c6235daf5b15e218136b7b2 Mon Sep 17 00:00:00 2001
From: Ben Gras <ben@minix3.org>
Date: Wed, 15 May 2013 15:45:33 +0000
Subject: [PATCH] virtio_blk: always start if found

Change-Id: Iec70c67e1b675297b5ffb800a9fb263feffa9271
---
 drivers/ramdisk/Makefile         |  2 +-
 drivers/ramdisk/proto            |  4 ++++
 drivers/ramdisk/proto.common.etc |  1 +
 drivers/ramdisk/rc               | 16 +++++++++++++++-
 4 files changed, 21 insertions(+), 2 deletions(-)
 mode change 100755 => 100644 drivers/ramdisk/rc

diff --git a/drivers/ramdisk/Makefile b/drivers/ramdisk/Makefile
index d34b27eb3..280c77043 100644
--- a/drivers/ramdisk/Makefile
+++ b/drivers/ramdisk/Makefile
@@ -29,7 +29,7 @@ ETC=		system.conf master.passwd
 EXTRA=		rc
 PROTO_FILES=	proto.common.etc proto.common.dynamic proto.dev
 PROG_DRIVERS=
-PROG_COMMANDS=	mount fsck.mfs sh service loadramdisk sysenv
+PROG_COMMANDS=	mount umount grep fsck.mfs sh service loadramdisk sysenv
 PROG_SERVERS=	mfs procfs
 PROG_BIN=
 PROG_SBIN=
diff --git a/drivers/ramdisk/proto b/drivers/ramdisk/proto
index 99659d46f..f8f650452 100644
--- a/drivers/ramdisk/proto
+++ b/drivers/ramdisk/proto
@@ -10,6 +10,8 @@ d--755 0 0
 		fsck.mfs ---755 0 0 fsck.mfs
 #endif
 		mount ---755 0 0 mount
+		umount ---755 0 0 umount
+		grep ---755 0 0 grep
 		sh ---755 0 0 sh
 		service ---755 0 0 service
 	$
@@ -42,6 +44,8 @@ d--755 0 0
 #endif
 		$
 	$
+	proc d--755 0 0
+	$
 	dev d--755 0 0
 #include "proto.dev"
 	$
diff --git a/drivers/ramdisk/proto.common.etc b/drivers/ramdisk/proto.common.etc
index 03b287005..bd6de5250 100644
--- a/drivers/ramdisk/proto.common.etc
+++ b/drivers/ramdisk/proto.common.etc
@@ -1,4 +1,5 @@
 	etc d--755 0 0
+		mtab    s--555 2 1      /proc/mounts
 		system.conf ---644 0 0 system.conf
 		passwd ---644 0 0 passwd
 		pwd.db ---644 0 0 pwd.db
diff --git a/drivers/ramdisk/rc b/drivers/ramdisk/rc
old mode 100755
new mode 100644
index b49c1dd8a..cf20b9929
--- a/drivers/ramdisk/rc
+++ b/drivers/ramdisk/rc
@@ -14,18 +14,32 @@ then	if [ -e $ACPI -a -n "`sysenv acpi`" ]
 		/bin/service -c up $ACPI
 	fi
 	/bin/service -c up /usr/sbin/pci
+
+	# Start procfs so we can access /proc/pci
+	mount -t procfs none /proc >/dev/null
+
+	# Do we want to use the virtio block device?
+	# If not specified, default to yes if the device is found.
+	if /bin/sysenv virtio_blk >/dev/null
+	then	virtio_blk="`/bin/sysenv virtio_blk`"
+        elif	grep '^[^ ]* [^ ]* 1AF4:1001 ' /proc/pci >/dev/null
+	then	echo "virtio_blk not set, defaulting to using found virtio device."
+		virtio_blk=yes
+        fi
+
 	/bin/service -cn up /sbin/floppy -dev /dev/fd0
 	if [ X`/bin/sysenv ahci` = Xyes ]
 	then
 		# this is here temporarily, for testing purposes
 		/bin/service -c up /sbin/ahci -dev /dev/c0d0 -label ahci_0 -args instance=0
-	elif [ X`/bin/sysenv virtio_blk` = Xyes ]
+	elif [ X"$virtio_blk" = Xyes ]
 	then
 		/bin/service -c up /sbin/virtio_blk -dev /dev/c0d0 -label virtio_blk_0 -args instance=0
 	else
 		/bin/service -c up /sbin/at_wini -dev /dev/c0d0 -label at_wini_0
 		/bin/service -cr up /sbin/at_wini -dev /dev/c1d0 -label at_wini_1 -args instance=1
 	fi
+	/bin/umount /proc >/dev/null
 fi
 
 if [ X`/bin/sysenv arch` = Xearm ]