X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Fcasper;h=61e579c69d34ddfad3cfe94ff4541e236991c0a5;hb=refs%2Ftags%2Fdebian%2F1.65%2Bdebian-1;hp=3d8c453dac2945f388769c47741fe0545efb5390;hpb=a7e62470dcdcd93501d9f54a96ca45d267ad1fe5;p=live-boot-grml.git

diff --git a/scripts/casper b/scripts/casper
index 3d8c453..61e579c 100644
--- a/scripts/casper
+++ b/scripts/casper
@@ -4,31 +4,68 @@
 
 export PATH=/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin
 
-mountpoint=/cdrom
+mountpoint=/live_media
 
-mkdir -p $mountpoint
+# Will be mounted if found as copy on write instead of tmpfs
+root_persistence="casper-rw"
 
-overlay_method=unionfs
-if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then
-    overlay_method=devmapper
-fi
+# TODO
+## Each file found with this pattern will be mounted directly in the 
+## mountpoint extracted from file name "${other_mounts_pattern}<mountpoint>"
+#other_mounts_pattern="casper-mount-"
+home_persistence="home-rw"
 
-USERNAME=ubuntu
-USERFULLNAME="Ubuntu LiveCD user"
-HOST=ubuntu
+#overlay_method=unionfs
+#if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then
+#    overlay_method=devmapper
+#fi
+
+USERNAME="casper"
+USERFULLNAME="Live session user"
+HOST="live"
+
+mkdir -p $mountpoint
 
 [ -f /etc/casper.conf ] && . /etc/casper.conf
 
 export USERNAME USERFULLNAME HOST
 
-casper_path() {
+# looking for casper specifics options as kernel parameters
+for x in $(cat /proc/cmdline); do
+    case $x in
+        netboot*)
+            export NETBOOT=${x#netboot=} ;;
+        toram)
+            export TORAM=1 ;;
+        show-cow)
+            export SHOWCOW=1 ;;
+        persistent)
+            export PERSISTENT=1 ;;
+        casper-getty)
+            export CASPERGETTY=1 ;;
+    esac
+done
+
+# sort of compatibility with netboot.h from linux docs
+if [ -z "${NETBOOT}" ]; then
+    if [ "${ROOT}" == "/dev/nfs" ]; then
+        NETBOOT="nfs"
+        export NETBOOT
+    elif [ "${ROOT}" == "/dev/cifs" ]; then
+        NETBOOT="cifs"
+        export NETBOOT
+    fi
+fi
+
+is_casper_path() {
     path=$1
-    if [ -e "$path/casper/filesystem.cloop" ]; then
-        echo "$path/casper/filesystem.cloop"
-        return 0
-    elif [ -e "$path/casper/filesystem.squashfs" ]; then
-        echo "$path/casper/filesystem.squashfs"
-        return 0
+    if [ -d "$path/casper" ]; then
+        if [ "$(echo $path/casper/*.cloop)" != "$path/casper/*.cloop" ] ||
+            [ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ] ||
+            [ "$(echo $path/casper/*.ext2)" != "$path/casper/*.ext2" ] ||
+            [ "$(echo $path/casper/*.dir)" != "$path/casper/*.dir" ]; then
+            return 0
+        fi
     fi
     return 1
 }
@@ -45,27 +82,45 @@ subdevices() {
 }
 
 get_backing_device() {
-	case "$1" in
-            *.cloop)
-                echo $(setup_loop "$1" "cloop" "/sys/block/cloop*")
-			;;
-            *.squashfs)
-                echo $(setup_loop "$1" "loop" "/sys/block/loop*")
-                ;;
-            *)
-                panic "Unrecognized casper filesystem: $1"
-                ;;
-	esac
+    case "$1" in
+        *.cloop)
+            echo $(setup_loop "$1" "cloop" "/sys/block/cloop*")
+            ;;
+        *.squashfs|*.ext2)
+            echo $(setup_loop "$1" "loop" "/sys/block/loop*")
+            ;;
+        *.dir)
+            echo "directory"
+            ;;
+        *)
+            panic "Unrecognized casper filesystem: $1"
+            ;;
+    esac
 }
 
-setup_cow() {
-	case "$1" in
-            unionfs)
-                setup_unionfs "$2" "$rootmnt"
-                ;;
-            devmapper)
-                setup_devmapper "$2" "$rootmnt"
-	esac
+match_files_in_dir() {
+    # Does any files match pattern $1 ?
+
+    local pattern="$1"
+    if [ "$(echo $pattern)" != "$pattern" ]; then
+        return 0
+    fi
+    return 1
+}
+
+mount_images_in_directory() {
+    directory="$1"
+    rootmnt="$2"
+    if match_files_in_dir "$directory/casper/*.cloop"; then
+        # Let's hope there's just one matching *.cloop... FIXME
+        setup_devmapper $(get_backing_device "$directory/casper/*.cloop") "$rootmnt"
+    elif match_files_in_dir "$directory/casper/*.squashfs" || 
+        match_files_in_dir "$directory/casper/*.ext2" ||
+        match_files_in_dir "$directory/casper/*.dir"; then
+        setup_unionfs "$directory/casper" "$rootmnt"
+    else
+        :
+    fi
 }
 
 sys2dev() {
@@ -78,9 +133,9 @@ setup_loop() {
     local module=$2
     local pattern=$3
 
-    modprobe -Qb "$module"
-    udevplug -W
- 
+    modprobe -qb "$module"
+    udevsettle
+
     for loopdev in $pattern; do
         if [ "$(cat $loopdev/size)" -eq 0 ]; then
             dev=$(sys2dev "${loopdev}")
@@ -93,6 +148,8 @@ setup_loop() {
 }
 
 get_fstype() {
+    #FIXME# one use of this function expects "unknown" another does not!
+    # which is it???
     local FSTYPE
     local FSSIZE
     eval $(fstype < $1)
@@ -107,7 +164,7 @@ setup_devmapper() {
     backdev="$1"
     rootmnt="$2"
 
-    modprobe -Qb dm-mod
+    modprobe -qb dm-mod
     COW_DEVICE=/dev/ram1
     COW_NAME="casper-cow"
 
@@ -143,121 +200,262 @@ where_is_mounted() {
     return 1
 }
 
+copy_to_ram() {
+    copyfrom="$1"
+
+    if [ ! -z "${2}" ] ; then
+        # This will enable future rampersistence, todo yet
+        copyto="${2}"
+        moveit="False"
+    else
+        copyto="${copyfrom}_swap"
+        moveit="True"
+    fi
+
+    size=$(du -ks ${copyfrom} | cut -f1)
+    size=$(expr ${size} + ${size}/20 ) # Fixme: 5% more to be sure
+    needed_space=$(expr ${size} * 1024)
+    freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
+    
+    if [ ! ${freespace} -lt ${needed_space}  ] ; then
+        [ "$quiet" != "y" ] && log_begin_msg "Not enough free memory to copy to ram"
+        [ "$quiet" != "y" ] && log_end_msg
+        return
+    else
+        [ "$quiet" != "y" ] && log_begin_msg "Copying live media to ram..."
+        mkdir "${copyto}"
+        mount -t tmpfs -o size=${size}k /dev/shm ${copyto}
+        cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
+        umount ${copyfrom}
+        if [ "${moveit}" == "True" ]; then
+            mount -r -o move ${copyto} ${copyfrom}
+            rmdir ${copyto}
+        fi
+        [ "$quiet" != "y" ] && log_end_msg
+    fi
+}
+
 find_cow_device() {
+    pers_label="${1}"
+    cow_backing="/${pers_label}-backing"
     for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
         for dev in $(subdevices "${sysblock}"); do
             devname=$(sys2dev "${dev}")
-            if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "casper-rw" ]; then
+            if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then
                 echo "$devname"
                 return
             elif [ "$(get_fstype ${devname})" = "vfat" ]; then
-                mkdir -p /cow-backing
+                mkdir -p "${cow_backing}"
                 if where_is_mounted ${devname} > /dev/null; then
                     mount -o remount,rw ${devname} $(where_is_mounted ${devname}) || panic "Remounting failed"
-                    mount -o bind $(where_is_mounted ${devname}) /cow-backing || panic "Cannot bind-mount"
+                    mount -o bind $(where_is_mounted ${devname}) ${cow_backing} || panic "Cannot bind-mount"
                 else
-                    mount -t $(get_fstype "${devname}") -o rw "${devname}" /cow-backing || panic "Cannot mount $devname on /cow-backing"
+                    mount -t $(get_fstype "${devname}") -o rw "${devname}" ${cow_backing} || panic "Cannot mount $devname on /cow-backing"
                 fi
 
-                if [ -e "/cow-backing/casper-rw" ]; then
-                    echo $(setup_loop "/cow-backing/casper-rw" "loop" "/sys/block/loop*")
+                if [ -e "${cow_backing}/${pers_label}" ]; then
+                    echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
                     return 0
                 else
-                    umount /cow-backing
+                    umount ${cow_backing}
                 fi
             fi
-            
         done
     done
-    return 1    
+}
+
+do_netmount() {
+    rc=1
+
+    modprobe -q af_packet # For DHCP
+
+    ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf
+
+    if [ "${NFSROOT}" = "auto" ]; then
+        NFSROOT=${ROOTSERVER}:${ROOTPATH}
+    fi
+
+    [ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
+    
+    if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
+        rc=0
+    elif do_nfsmount ; then
+        NETBOOT="nfs"
+        export NETBOOT
+        rc=0
+    fi
+
+    [ "$quiet" != "y" ] && log_end_msg
+    return ${rc}
+}
+
+do_nfsmount() {
+    rc=1
+    modprobe -q nfs
+    if [ -z "${NFSOPTS}" ]; then
+        NFSOPTS=""
+    fi
+
+    [ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
+    # FIXME: This for loop is an ugly HACK round an nfs bug
+    for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
+        nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
+        sleep 1
+    done
+    return ${rc}
+}
+
+do_cifsmount() {
+    rc=1
+    if [ -x "/sbin/mount.cifs" ]; then
+        if [ -z "${NFSOPTS}" ]; then
+            CIFSOPTS="-ouser=root,password="
+        else
+            CIFSOPTS="${NFSOPTS}"
+        fi
+
+        [ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
+        modprobe -q cifs
+
+        if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then
+            rc=0
+        fi
+    fi
+    return ${rc}
 }
 
 setup_unionfs() {
-	backdev="$1"
-	rootmnt="$2"
-        modprobe -Qb unionfs
-        mkdir -p /cow
-
-        if grep -q persistent /proc/cmdline; then
-            i=0
-            # We love udev and the kernel!
-            while [ "$i" -lt 300 ]; do
-                cowdevice=$(find_cow_device) 
-                if [ -b "$cowdevice" ]; then
-                    mount -t $(get_fstype "$cowdevice") -o rw "$cowdevice" /cow || panic "Can not mount $cowdevice on /cow"
-                    break
+    image_directory="$1"
+    rootmnt="$2"
+
+    modprobe -qb unionfs
+
+    # run-init can't deal with this, but we're going to move all of these
+    # away before it runs anyway.
+    croot="/casper"
+
+    # Let's just mount the read-only file systems first
+    rofsstring=""
+    rofslist=""
+    if [ "${NETBOOT}" == "nfs" ] ; then
+        roopt="nfsro" # go aroung a bug in nfs-unionfs locking
+    else
+        roopt="ro"
+    fi
+
+    mkdir -p "${croot}"
+    for image_type in "ext2" "squashfs" "dir" ; do
+        for image in "${image_directory}"/*."${image_type}"; do
+            imagename=$(basename "${image}")
+            if [ -d "${image}" ]; then
+                # it is a plain directory: do nothing
+                rofsstring="${image}=${roopt}:${rofsstring}"
+                rofslist="${image} ${rofslist}"
+            elif [ -f "${image}" ]; then
+                backdev=$(get_backing_device "$image")
+                fstype=$(get_fstype "${backdev}")
+                if [ "${fstype}" = "unknown" ]; then
+                    panic "Unknown file system type on ${backdev} (${image})"
                 fi
-                sleep 5
-#                sleep 0.1
-                i=$(( $i + 1 ))
-            done
+                mkdir -p "${croot}/${imagename}"
+                mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
+            fi
+        done
+    done
+    rofsstring=${rofsstring%:}
+
+    mkdir -p /cow
+    cowdevice="tmpfs"
+    cow_fstype="tmpfs"
+    
+    # Looking for "${root_persistence}" device or file
+    if [ ! -z "${PERSISTENT}" ]; then
+        cowprobe=$(find_cow_device "${root_persistence}")
+        if [ -b "${cowprobe}" ]; then
+            cowdevice=${cowprobe}
+            cow_fstype=$(get_fstype "${cowprobe}")
         else
-            mount -t tmpfs tmpfs /cow
+            [ "$quiet" != "y" ] &&    log_begin_msg "Unable to find the persistent medium"
         fi
-
-	mkdir -p /rofs
-    if [ "$(get_fstype $backdev)" = "unknown" ]; then
-        panic "Unknown file system type on $backdev"
     fi
-	mount -t $(get_fstype "$backdev") -o ro "$backdev" /rofs || panic "Can not mount $backdev on /rofs"
 
-	mount -t unionfs -o dirs=/cow=rw:/rofs=ro unionfs "$rootmnt"
-        if grep -q show-cow /proc/cmdline; then
-            mkdir -p "$rootmnt/cow"
-            mount -o bind /cow "$rootmnt/cow"
+    mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow"
+    
+    mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" || panic "Unionfs mount failed"
+    
+    for d in ${rofslist}; do
+        mkdir -p "${rootmnt}/casper/${d##*/}"
+        case d in
+            *.dir) mount -o bind "${d}" "${rootmnt}/casper/${d##*/}" ;;
+            *) mount -o move "${d}" "${rootmnt}/casper/${d##*/}" ;;
+        esac
+    done
+
+    # Adding other custom mounts
+    if [ ! -z "${PERSISTENT}" ]; then
+        homecow=$(find_cow_device "${home_persistence}" )
+        if [ -b "${homecow}" ]; then
+            mount ${homecow} -t $(get_fstype "${homecow}") -o rw "${rootmnt}/home"
+        else 
+            [ "$quiet" != "y" ] &&  log_begin_msg "Unable to find the persistent home medium"
         fi
-        mkdir -p "$rootmnt/rofs"
-        mount -o bind /rofs "$rootmnt/rofs"
+    fi
+
+    if [ ! -z "${SHOWCOW}" ]; then
+        mkdir -p "$rootmnt/cow"
+        mount -o bind /cow "$rootmnt/cow"
+    fi
 }
 
 is_usb_device() {
     sysfs_path="${1#/sys}"
-    if /lib/udev/path_id "${sysfs_path}" | grep -q "ID_PATH=usb"; then
+    if /lib/udev/path_id "${sysfs_path}" | grep -Eq "ID_PATH=(usb|pci-[^-]*-usb)"; then
         return 0
     fi
     return 1
 }
 
-find_cd() {
-	mounted=
-        for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
-            devname=$(sys2dev "${sysblock}")
-            fstype=$(get_fstype "${devname}")
-            if /lib/udev/cdrom_id ${devname} > /dev/null; then
-                mount -t ${fstype} -o ro "$devname" $mountpoint || continue
-                if casper_path $mountpoint; then
-                    echo $(casper_path $mountpoint)
-                    return
-                else
-                    umount $mountpoint
-                fi
-            elif is_usb_device "$sysblock"; then
-                for dev in $(subdevices "${sysblock}"); do
-                    devname=$(sys2dev "${dev}")
-                    fstype=$(get_fstype "${devname}")
-                    case ${fstype} in
-                        vfat|iso9660|udf)
-                            mount -t ${fstype} -o ro "${devname}" $mountpoint || continue
-                            if casper_path $mountpoint; then
-                                echo $(casper_path $mountpoint)
-                                return
-                            else
-                                umount $mountpoint
-                            fi
-                            ;;
-                    esac
-                done
-	    elif [ "${fstype}" = "squashfs" ]; then
-
-                # This is an ugly hack situation, the block device has
-                # a squashfs image directly on it.  It's hopefully
-                # casper, so take it and run with it.
-
-                ln -s "${devname}" "${devname}.${fstype}"
-                echo "${devname}.${fstype}"
+find_livefs() {
+    mounted=
+    for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
+        devname=$(sys2dev "${sysblock}")
+        fstype=$(get_fstype "${devname}")
+        if /lib/udev/cdrom_id ${devname} > /dev/null; then
+            mount -t ${fstype} -o ro "$devname" $mountpoint || continue
+            if is_casper_path $mountpoint; then
+                echo $mountpoint
                 return
+            else
+                umount $mountpoint
             fi
-        done
+        elif is_usb_device "$sysblock"; then
+            for dev in $(subdevices "${sysblock}"); do
+                devname=$(sys2dev "${dev}")
+                fstype=$(get_fstype "${devname}")
+                case ${fstype} in
+                    vfat|iso9660|udf)
+                        mount -t ${fstype} -o ro "${devname}" $mountpoint || continue
+                        if is_casper_path $mountpoint; then
+                            echo $mountpoint
+                            return
+                        else
+                            umount $mountpoint
+                        fi
+                        ;;
+                esac
+            done
+        elif [ "${fstype}" = "squashfs" ||  \
+                "${fstype}" = "ext2" ]; then
+        
+            # This is an ugly hack situation, the block device has
+            # an image directly on it.  It's hopefully
+            # casper, so take it and run with it.
+        
+            ln -s "${devname}" "${devname}.${fstype}"
+            echo "${devname}.${fstype}"
+            return
+        fi
+    done
 }
 
 set_usplash_timeout() {
@@ -271,7 +469,7 @@ mountroot() {
     exec 7>&2
     exec > casper.log
     exec 2>&1
-
+    
     set_usplash_timeout
     [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
     run_scripts /scripts/casper-premount
@@ -282,18 +480,32 @@ mountroot() {
 
     set_usplash_timeout
 
-    for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
-        live_image=$(find_cd)
-        if [ "${live_image}" ]; then
-            break
+    if [ ! -z "${NETBOOT}" ]; then
+        if do_netmount ; then
+            livefs_root="${mountpoint}"
+        else
+            panic "Unable to find a the network rootfs live file system"
+        fi
+    else
+        # Scan local devices for the image
+        for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
+            livefs_root=$(find_livefs)
+            if [ "${livefs_root}" ]; then
+                break
+            fi
+        done
+
+        if [ "$?" -gt 0 ]; then
+            panic "Unable to find a medium containing a live file system"
+        fi
+            
+        if [ ! -z "${TORAM}" ]; then
+            copy_to_ram "${livefs_root}"
         fi
-        sleep 1
-    done
-    if [ "$?" -gt 0 ]; then
-        panic "Unable to find a CD-ROM containing a live file system"
     fi
-    
-    setup_cow "$overlay_method" "$(get_backing_device $live_image)" "$rootmnt"
+    sleep 1
+
+    mount_images_in_directory "$livefs_root" "$rootmnt"
 
     log_end_msg