File 0057-add-module-btrfs.patch of Package dracut

From e20777d90e7c11c14f41d716230d7e96dbb5e1ab Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald@redhat.com>
Date: Tue, 13 Apr 2010 14:03:05 +0200
Subject: [PATCH] add module btrfs

---
 modules.d/90btrfs/40-btrfs.rules |  7 +++++++
 modules.d/90btrfs/check          | 10 ++++++++++
 modules.d/90btrfs/install        |  4 ++++
 modules.d/95udev-rules/install   |  2 +-
 4 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 modules.d/90btrfs/40-btrfs.rules
 create mode 100755 modules.d/90btrfs/check
 create mode 100755 modules.d/90btrfs/install

diff --git a/modules.d/90btrfs/40-btrfs.rules b/modules.d/90btrfs/40-btrfs.rules
new file mode 100644
index 0000000..e74ba1a
--- /dev/null
+++ b/modules.d/90btrfs/40-btrfs.rules
@@ -0,0 +1,7 @@
+SUBSYSTEM!="block", GOTO="btrfs_end"
+ACTION!="add|change", GOTO="btrfs_end"
+
+ENV{ID_FS_TYPE}=="btrfs", RUN+="/sbin/btrfs device scan $env{DEVNAME}"
+
+LABEL="btrfs_end"
+
diff --git a/modules.d/90btrfs/check b/modules.d/90btrfs/check
new file mode 100755
index 0000000..2897d46
--- /dev/null
+++ b/modules.d/90btrfs/check
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# We depend on udev-rules being loaded
+[ "$1" = "-d" ] && exit 0
+
+# if we don't have dmraid installed on the host system, no point
+# in trying to support it in the initramfs.
+which btrfs >/dev/null 2>&1 || exit 1
+
+exit 0
diff --git a/modules.d/90btrfs/install b/modules.d/90btrfs/install
new file mode 100755
index 0000000..130a84d
--- /dev/null
+++ b/modules.d/90btrfs/install
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+inst_rules "$moddir/40-btrfs.rules"
+dracut_install btrfs
diff --git a/modules.d/95udev-rules/install b/modules.d/95udev-rules/install
index cd6171a..1e648d5 100755
--- a/modules.d/95udev-rules/install
+++ b/modules.d/95udev-rules/install
@@ -24,7 +24,7 @@ else
     inst_rules "$moddir/59-persistent-storage-volid.rules"
 fi
 inst_rules "$moddir/61-persistent-storage.rules"
-    
+
 for i in \
 ata_id \
 cdrom_id \
-- 
1.8.3.1