add new option to mount cow device on nfs volume

At the moment this only works with the root volume
on nfs as well. If we add a switch to configure the
network early in the boot process then this option
could be made available for other root mediums. This
option works reliably on the latest kernel 2.6.23.1
On earlier kernels I experienced frequent oopses.

functions/defaults.sh

@@ -540,24 +540,27 @@ Set_defaults ()
 	LH_MEMTEST="${LH_MEMTEST:-memtest86+}"
 
 	# Setting netboot filesystem
-	LH_NET_FILESYSTEM="${LH_NET_FILESYSTEM:-nfs}"
+	LH_NET_ROOT_FILESYSTEM="${LH_NET_ROOT_FILESYSTEM:-nfs}"
 
 	# Setting netboot server path
-	if [ -z "${LH_NET_PATH}" ]
+	if [ -z "${LH_NET_ROOT_PATH}" ]
 	then
 		case "${LH_MODE}" in
 			debian)
-				LH_NET_PATH="/srv/debian-live"
+				LH_NET_ROOT_PATH="/srv/debian-live"
 				;;
 
 			debian-edu)
-				LH_NET_PATH="/srv/debian-edu-live"
+				LH_NET_ROOT_PATH="/srv/debian-edu-live"
 				;;
 		esac
 	fi
 
 	# Setting netboot server address
-	LH_NET_SERVER="${LH_NET_SERVER:-192.168.1.1}"
+	LH_NET_ROOT_SERVER="${LH_NET_ROOT_SERVER:-192.168.1.1}"
+
+	# Setting net cow filesystem
+	LH_NET_COW_FILESYSTEM="${LH_NET_COW_FILESYSTEM:-nfs}"
 
 	# Setting syslinux configuration file
 	# LH_SYSLINUX_CFG

helpers/lh_binary_grub

@@ -178,6 +178,12 @@ then
 	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} union=${LH_UNION_FILESYSTEM}"
 fi
 
+if [ -n "${LH_NET_COW_PATH}" ]
+then
+	Echo_error "Net cow not yet supported on grub"
+   exit 1
+fi
+
 if [ "${LH_EXPOSED_ROOT}" != "disabled" ]
 then
 	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} exposedroot"

helpers/lh_binary_net

@@ -59,21 +59,21 @@ then
 fi
 
 # Creating image file
-if [ "$(basename ${LH_NET_PATH})" = "chroot" ]
+if [ "$(basename ${LH_NET_ROOT_PATH})" = "chroot" ]
 then
 	mv chroot chroot.tmp
 fi
 
-mv binary "$(basename ${LH_NET_PATH})"
+mv binary "$(basename ${LH_NET_ROOT_PATH})"
 
 cd ..
-tar cfz binary-net.tar.gz "$(basename ${OLDPWD})/$(basename ${LH_NET_PATH})" "$(basename ${OLDPWD})/tftpboot"
+tar cfz binary-net.tar.gz "$(basename ${OLDPWD})/$(basename ${LH_NET_ROOT_PATH})" "$(basename ${OLDPWD})/tftpboot"
 mv binary-net.tar.gz "${OLDPWD}"
 cd "${OLDPWD}"
 
-mv "$(basename ${LH_NET_PATH})" binary
+mv "$(basename ${LH_NET_ROOT_PATH})" binary
 
-if [ "$(basename ${LH_NET_PATH})" = "chroot" ]
+if [ "$(basename ${LH_NET_ROOT_PATH})" = "chroot" ]
 then
 	mv chroot.tmp chroot
 fi

helpers/lh_binary_syslinux

@@ -411,13 +411,13 @@ fi
 
 if [ "${LH_BINARY_IMAGES}" = "net" ]
 then
-	case "${LH_NET_FILESYSTEM}" in
+	case "${LH_NET_ROOT_FILESYSTEM}" in
 		nfs)
-			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} netboot=nfs nfsroot=${LH_NET_SERVER}:${LH_NET_PATH}"
+			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} netboot=nfs nfsroot=${LH_NET_ROOT_SERVER}:${LH_NET_ROOT_PATH}"
 			;;
 
 		cifs)
-			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} netboot=cifs nfsroot=//${LH_NET_SERVER}${LH_NET_PATH}"
+			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} netboot=cifs nfsroot=//${LH_NET_ROOT_SERVER}${LH_NET_ROOT_PATH}"
 			;;
 
 		*)
@@ -426,12 +426,29 @@ then
 			;;
 	esac
 
-	if [ -n "${LH_NET_MOUNTOPTIONS}" ]
+	if [ -n "${LH_NET_ROOT_MOUNTOPTIONS}" ]
 	then
-		LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} nfsopts=${LH_NET_MOUNTOPTIONS}"
+		LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} nfsopts=${LH_NET_ROOT_MOUNTOPTIONS}"
 	fi
 fi
 
+if [ -n "${LH_NET_COW_PATH}" ]
+then
+	case "${LH_NET_COW_FILESYSTEM}" in
+	   nfs)
+			if [ -n "${LH_NET_COW_MOUNTOPTIONS}" ]
+			then
+				LH_NET_COW_MOUNTOPTIONS=",${LH_NET_COW_MOUNTOPTIONS}"
+			fi
+			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} nfscow=${LH_NET_COW_SERVER}:${LH_NET_COW_PATH}${LH_NET_COW_MOUNTOPTIONS}"
+	      ;;
+	   *)
+	      Echo_error "Unsupported net filesystem"
+	      exit 1
+	      ;;
+	esac
+fi
+
 LH_BOOTAPPEND_LIVE="$(echo ${LH_BOOTAPPEND_LIVE} | sed -e 's/  //')"
 
 # Parameters are listed at: linux/Documentation/kernel-parameters.txt

helpers/lh_binary_yaboot

@@ -186,6 +186,12 @@ then
 	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} union=${LH_UNION_FILESYSTEM}"
 fi
 
+if [ -n "${LH_NET_COW_PATH}" ]
+then
+   Echo_error "Net cow not yet supported on yaboot"
+   exit 1
+fi
+
 if [ "${LH_EXPOSED_ROOT}" != "disabled" ]
 then
 	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} exposedroot"

helpers/lh_chroot_hacks

@@ -50,6 +50,10 @@ Create_lockfile .lock
 # Removing udev mac caching rule
 Chroot "rm -f /etc/udev/rules.d/z25_persistent-net.rules"
 
+# Blanking out fstab, so the live-initramfs will know to populate it
+Chroot "rm -f /etc/fstab"
+Chroot "touch /etc/fstab"
+
 case "${LH_BINARY_IMAGES}" in
 	net)
 		if [ ! -f chroot/usr/bin/smbmount ]

helpers/lh_config

@@ -76,10 +76,14 @@ USAGE="${PROGRAM} [--apt apt|aptitude]\n\
 \t    [--mirror-bootstrap-security URL]\n\
 \t    [--mirror-bootstrap URL]\n\
 \t    [--mode debian|debian-edu]\n\
-\t    [--net-filesystem nfs|cfs]\n\
+\t    [--net-root-filesystem nfs|cfs]\n\
-\t    [--net-mountoptions OPTIONS]\n\
+\t    [--net-root-mountoptions OPTIONS]\n\
-\t    [--net-path PATH]\n\
+\t    [--net-root-path PATH]\n\
-\t    [--net-server IP|HOSTNAME]\n\
+\t    [--net-root-server IP|HOSTNAME]\n\
+\t    [--net-cow-filesystem nfs|cfs]\n\
+\t    [--net-cow-mountoptions OPTIONS]\n\
+\t    [--net-cow-path PATH]\n\
+\t    [--net-cow-server IP|HOSTNAME]\n\
 \t    [-p|--packages-lists FILE]\n\
 \t    [--packages PACKAGE|\"PACKAGES\"]\n\
 \t    [--quiet]\n\
@@ -102,7 +106,7 @@ USAGE="${PROGRAM} [--apt apt|aptitude]\n\
 
 Local_arguments ()
 {
-	ARGUMENTS="$(getopt --longoptions apt:,apt-ftp-proxy:,apt-http-proxy:,apt-pdiffs:,apt-pipeline:,apt-recommends:,apt-secure:,bootstrap:,cache:,cache-indices:,cache-packages:,cache-stages:,debconf-frontend:,debconf-nowarnings:,debconf-priority:,genisoimage:,initramfs:,losetup:,mode:,root-command:,tasksel:,includes:,templates:,architecture:,bootstrap-config:,bootstrap-flavour:,bootstrap-keyring:,distribution:,mirror-bootstrap:,mirror-bootstrap-security:,mirror-binary:,mirror-binary-security:,sections:,chroot-filesystem:,union-filesystem:,exposed-root:,hooks:,interactive:,keyring-packages:,language:,linux-flavours:,linux-packages:,packages:,packages-lists:,tasks:,security:,symlinks:,sysvinit:,binary-images:,binary-indices:,bootappend-install:,bootappend-live:,bootloader:,chroot-build:,debian-installer:,debian-installer-daily:,encryption:,grub-splash:,hostname:,iso-application:,iso-preparer:,iso-publisher:,iso-volume:,memtest:,net-filesystem:,net-mountoptions:,net-path:,net-server:,syslinux-splash:,syslinux-timeout:,username:,source:,source-images:,breakpoints,conffile:,debug,force,help,quiet,usage,verbose,version --name=${PROGRAM} --options a:f:d:m:l:k:p:b:e:s:c:huv --shell sh -- "${@}")"
+	ARGUMENTS="$(getopt --longoptions apt:,apt-ftp-proxy:,apt-http-proxy:,apt-pdiffs:,apt-pipeline:,apt-recommends:,apt-secure:,bootstrap:,cache:,cache-indices:,cache-packages:,cache-stages:,debconf-frontend:,debconf-nowarnings:,debconf-priority:,genisoimage:,initramfs:,losetup:,mode:,root-command:,tasksel:,includes:,templates:,architecture:,bootstrap-config:,bootstrap-flavour:,bootstrap-keyring:,distribution:,mirror-bootstrap:,mirror-bootstrap-security:,mirror-binary:,mirror-binary-security:,sections:,chroot-filesystem:,union-filesystem:,exposed-root:,hooks:,interactive:,keyring-packages:,language:,linux-flavours:,linux-packages:,packages:,packages-lists:,tasks:,security:,symlinks:,sysvinit:,binary-images:,binary-indices:,bootappend-install:,bootappend-live:,bootloader:,chroot-build:,debian-installer:,debian-installer-daily:,encryption:,grub-splash:,hostname:,iso-application:,iso-preparer:,iso-publisher:,iso-volume:,memtest:,net-root-filesystem:,net-root-mountoptions:,net-root-path:,net-root-server:,net-cow-filesystem:,net-cow-mountoptions:,net-cow-path:,net-cow-server:,syslinux-splash:,syslinux-timeout:,username:,source:,source-images:,breakpoints,conffile:,debug,force,help,quiet,usage,verbose,version --name=${PROGRAM} --options a:f:d:m:l:k:p:b:e:s:c:huv --shell sh -- "${@}")"
 
 	if [ "${?}" != "0" ]
 	then
@@ -464,23 +468,43 @@ Local_arguments ()
 				shift 2
 				;;
 
-			--net-filesystem)
+			--net-root-filesystem)
-				LH_NET_FILESYSTEM="${2}"
+				LH_NET_ROOT_FILESYSTEM="${2}"
 				shift 2
 				;;
 
-			--net-mountoptions)
+			--net-root-mountoptions)
-				LH_NET_MOUNTOPTIONS="${2}"
+				LH_NET_ROOT_MOUNTOPTIONS="${2}"
 				shift 2
 				;;
 
-			--net-path)
+			--net-root-path)
-				LH_NET_PATH="${2}"
+				LH_NET_ROOT_PATH="${2}"
 				shift 2
 				;;
 
-			--net-server)
+			--net-root-server)
-				LH_NET_SERVER="${2}"
+				LH_NET_ROOT_SERVER="${2}"
+				shift 2
+				;;
+
+			--net-cow-filesystem)
+				LH_NET_COW_FILESYSTEM="${2}"
+				shift 2
+				;;
+
+			--net-cow-mountoptions)
+				LH_NET_COW_MOUNTOPTIONS="${2}"
+				shift 2
+				;;
+
+			--net-cow-path)
+				LH_NET_COW_PATH="${2}"
+				shift 2
+				;;
+
+			--net-cow-server)
+				LH_NET_COW_SERVER="${2}"
 				shift 2
 				;;
 
@@ -911,21 +935,37 @@ LH_ISO_VOLUME="${LH_ISO_VOLUME}"
 # (Default: ${LH_MEMTEST})
 LH_MEMTEST="${LH_MEMTEST}"
 
-# \$LH_NET_FILESYSTEM: set netboot filesystem
+# \$LH_NET_ROOT_FILESYSTEM: set netboot filesystem
-# (Default: ${LH_NET_FILESYSTEM})
+# (Default: ${LH_NET_ROOT_FILESYSTEM})
-LH_NET_FILESYSTEM="${LH_NET_FILESYSTEM}"
+LH_NET_ROOT_FILESYSTEM="${LH_NET_ROOT_FILESYSTEM}"
 
-# \$LH_NET_MOUNTOPTIONS: set nfsopts
+# \$LH_NET_ROOT_MOUNTOPTIONS: set nfsopts
 # (Default: empty)
-LH_NET_MOUNTOPTIONS="${LH_NET_MOUNTOPTIONS}"
+LH_NET_ROOT_MOUNTOPTIONS="${LH_NET_ROOT_MOUNTOPTIONS}"
 
-# \$LH_NET_PATH: set netboot server directory
+# \$LH_NET_ROOT_PATH: set netboot server directory
-# (Default: ${LH_NET_PATH})
+# (Default: ${LH_NET_ROOT_PATH})
-LH_NET_PATH="${LH_NET_PATH}"
+LH_NET_ROOT_PATH="${LH_NET_ROOT_PATH}"
 
-# \$LH_NET_SERVER: set netboot server address
+# \$LH_NET_ROOT_SERVER: set netboot server address
-# (Default: ${LH_NET_SERVER})
+# (Default: ${LH_NET_ROOT_SERVER})
-LH_NET_SERVER="${LH_NET_SERVER}"
+LH_NET_ROOT_SERVER="${LH_NET_ROOT_SERVER}"
+
+# \$LH_NET_COW_FILESYSTEM: set net client cow filesystem
+# (Default: ${LH_NET_COW_FILESYSTEM})
+LH_NET_COW_FILESYSTEM="${LH_NET_COW_FILESYSTEM}"
+
+# \$LH_NET_COW_MOUNTOPTIONS: set cow mount options
+# (Default: empty)
+LH_NET_COW_MOUNTOPTIONS="${LH_NET_COW_MOUNTOPTIONS}"
+
+# \$LH_NET_COW_PATH: set cow directory
+# (Default: ${LH_NET_COW_PATH})
+LH_NET_COW_PATH="${LH_NET_COW_PATH}"
+
+# \$LH_NET_COW_SERVER: set cow server
+# (Default: ${LH_NET_COW_SERVER})
+LH_NET_COW_SERVER="${LH_NET_COW_SERVER}"
 
 # \$LH_SYSLINUX_SPLASH: set custom syslinux splash
 # (Default: empty)

manpages/lh_config.en.1

@@ -113,13 +113,32 @@ Here is the complete list of available options for lh_config.
 
 .IP "\fB\-\-mode\fR debian|debian\-edu" 4
 
-.IP "\fB\-\-net\-filesystem\fR nfs|cfs" 4
+.IP "\fB\-\-net\-root\-filesystem\fR nfs|cfs" 4
 
-.IP "\fB\-\-net\-mountoptions\fR \fIOPTION\fR|""\fIOPTIONS\fR""" 4
+.IP "\fB\-\-net\-root\-mountoptions\fR \fIOPTION\fR|""\fIOPTIONS\fR""" 4
 
-.IP "\fB\-\-net\-path\fR \fIPATH\fR" 4
+.IP "\fB\-\-net\-root\-path\fR \fIPATH\fR" 4
 
-.IP "\fB\-\-net\\-server\fR \fIIP\fR|\fIHOSTNAME\fR" 4
+.IP "\fB\-\-net\-root\\-server\fR \fIIP\fR|\fIHOSTNAME\fR" 4
+
+.IP "\fB\-\-net\-cow\-filesystem\fR nfs" 4
+
+.IP "\fB\-\-net\-cow\-mountoptions\fR \fIOPTION\fR|""\fIOPTIONS\fR""" 4
+
+.IP "\fB\-\-net\-cow\-path\fR \fIPATH\fR" 4
+Specify path to client writable filesystem. Anywhere that
+.BI "client_mac_address"
+is specified in the path live-initramfs
+will substitute the MAC address of the client delimited with hyphens.
+.RS
+.TP
+EXAMPLE:
+/export/hosts/client_mac_address
+.br
+/export/hosts/52-54-00-12-34-56
+.RE
+
+.IP "\fB\-\-net\-cow\\-server\fR \fIIP\fR|\fIHOSTNAME\fR" 4
 
 .IP "\fB\-p|\-\-packages\-lists\fR \fIFILE\fR" 4