1 files changed, 107 insertions, 0 deletions
diff --git a/contrib/initramfs/hooks/zfs.in b/contrib/initramfs/hooks/zfs.in
new file mode 100755
index 000000000..ef3ccbc18
--- /dev/null
+++ b/contrib/initramfs/hooks/zfs.in
@@ -0,0 +1,107 @@
+#!/bin/sh
+#
+# Add ZoL filesystem capabilities to an initrd, usually for a native ZFS root.
+#
+
+# This hook installs udev rules for ZoL.
+PREREQ="zdev"
+
+# These prerequisites are provided by the zfsutils package. The zdb utility is
+# not strictly required, but it can be useful at the initramfs recovery prompt.
+# The mount helper mount.zfs must be installed in /sbin because this path is
+# hardcoded in the mount(8) for security reasons.
+COPY_EXEC_LIST="@sbindir@/zdb @sbindir@/zpool @sbindir@/zfs /sbin/mount.zfs"
+COPY_EXEC_LIST="$COPY_EXEC_LIST @udevdir@/vdev_id"
+COPY_FILE_LIST="/etc/hostid @sysconfdir@/zfs/zpool.cache"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/default/zfs"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/zfs-functions"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/vdev_id.conf"
+COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/69-vdev.rules"
+
+# These prerequisites are provided by the base system.
+COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /bin/hostname /sbin/blkid"
+
+# Explicitly specify all kernel modules because automatic dependency resolution
+# is unreliable on many systems.
+BASE_MODULES="zlib_deflate spl zavl zcommon znvpair zunicode zfs icp"
+CRPT_MODULES="sun-ccm sun-gcm sun-ctr"
+MANUAL_ADD_MODULES_LIST="$BASE_MODULES"
+
+# Generic result code.
+RC=0
+
+case $1 in
+prereqs)
+	echo "$PREREQ"
+	exit 0
+	;;
+esac
+
+for ii in $COPY_EXEC_LIST
+do
+	if [ ! -x "$ii" ]
+	then
+		echo "Error: $ii is not executable."
+		RC=2
+	fi
+done
+
+if [ "$RC" -ne 0 ]
+then
+	exit "$RC"
+fi
+
+. /usr/share/initramfs-tools/hook-functions
+
+mkdir -p "$DESTDIR/etc/"
+
+# ZDB uses pthreads for some functions, but the library dependency is not
+# automatically detected. The `find` utility and extended `cp` options are
+# used here because libgcc_s.so could be in a subdirectory of /lib for
+# multi-arch installations.
+cp --target-directory="$DESTDIR" --parents $(find /lib/ -type f -name libgcc_s.so.1)
+
+for ii in $COPY_EXEC_LIST
+do
+	copy_exec "$ii"
+done
+
+for ii in $COPY_FILE_LIST
+do
+	dir=$(dirname "$ii")
+	[ -d "$dir" ] && mkdir -p "$DESTDIR/$dir"
+	[ -f "$ii" ] && cp -p "$ii" "$DESTDIR/$ii"
+done
+
+for ii in $MANUAL_ADD_MODULES_LIST
+do
+	manual_add_modules "$ii"
+done
+
+if [ -f "/etc/hostname" ]
+then
+	cp -p "/etc/hostname" "$DESTDIR/etc/"
+else
+	hostname >"$DESTDIR/etc/hostname"
+fi
+
+for ii in zfs zfs.conf spl spl.conf
+do
+	if [ -f "/etc/modprobe.d/$ii" ]; then
+		if [ ! -d "$DESTDIR/etc/modprobe.d" ]; then
+			mkdir -p $DESTDIR/etc/modprobe.d
+		fi
+		cp -p "/etc/modprobe.d/$ii" $DESTDIR/etc/modprobe.d/
+	fi
+done
+
+# With pull request #1476 (not yet merged) comes a verbose warning
+# if /usr/bin/net doesn't exist or isn't executable. Just create
+# a dummy...
+[ ! -d "$DESTDIR/usr/bin" ] && mkdir -p "$DESTDIR/usr/bin"
+if [ ! -x "$DESTDIR/usr/bin/net" ]; then
+    touch "$DESTDIR/usr/bin/net"
+    chmod +x "$DESTDIR/usr/bin/net"
+fi
+
+exit 0