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authorGerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>2011-06-18 18:38:58 -0300
committerGerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>2011-06-18 18:38:27 -0300
commitc237dce170264fed2d3262e1d168710841b77075 (patch)
treeab06203d9978d25db1112e09d8e2534dee393375 /archiso/hooks
parent17532f449fdec2160b55b7c68ff50f5f0154ed0c (diff)
[archiso] Use dm-snapshot instead of aufs2 (A.K.A. "The Big Commit")
* Use device mapper + snapshot module, instead union layer filesystem. * A block-level approach vs vfs-level. * No more unofficial (Linux) things. * More memory is needed. * Refactor mkarchiso. * Refactor hooks/archiso. * Fix install/archiso_pxe_nbd (due recent change in mkinitcpio-0.6.15 on checked_modules()/all_modules()) [Thanks Dave for the improved workaround] * New configs/releng to build official images. * Works with a Bash script instead of Makefile. (better control and easy to maintain) * Remove configs/syslinux-iso. * Remove archiso2dual script. Integrate functionality in configs/releng. * New configs/baseline to build the most basic live medium or use as template. * New README (draft). [Thanks Dieter for fixing english grammar] Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
Diffstat (limited to 'archiso/hooks')
-rw-r--r--archiso/hooks/archiso207
1 files changed, 107 insertions, 100 deletions
diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso
index a129b20..b81bbf7 100644
--- a/archiso/hooks/archiso
+++ b/archiso/hooks/archiso
@@ -1,158 +1,165 @@
-# args: source, mountpoint
-_mnt_aufs() {
- src="${1}"
- mnt="${2}"
- msg "::: Adding new aufs branch: ${src} to ${mnt}"
- mkdir -p "${mnt}"
- /bin/mount -t aufs -o remount,append:"${src}"=ro none "${mnt}"
+# Initialize loopback device logic (we using on-demand mode)
+# args: none
+_init_loop_dev() {
+ loop_dev_cnt=99
+}
+
+# Call this function before _make_loop_dev() each time.
+# args: none
+_next_loop_dev() {
+ loop_dev_cnt=$((loop_dev_cnt+1))
+}
+
+# Setup a loopback device for image passed as arguemnt and echo the path to loopback device used.
+# args: /path/to/image_file
+_make_loop_dev() {
+ local img="${1}"
+ mknod /dev/loop${loop_dev_cnt} b 7 ${loop_dev_cnt} &> /dev/null
+ losetup /dev/loop${loop_dev_cnt} "${img}" &> /dev/null
+ echo /dev/loop${loop_dev_cnt}
}
# args: source, mountpoint
-_mnt_bind() {
- src="${1}"
- mnt="${2}"
- msg "::: Binding ${src} to ${mnt}"
+_mnt_fs() {
+ local img="${1}"
+ local mnt="${2}"
+ local img_fullname="${img##*/}";
+ local img_name="${img_fullname%%.*}"
+ local ro_dev ro_dev_size ro_dev_fs_type rw_dev
+
mkdir -p "${mnt}"
- /bin/mount -o bind "${src}" "${mnt}"
+
+ _next_loop_dev
+ ro_dev=$(_make_loop_dev "${img}")
+ ro_dev_size=$(blockdev --getsz ${ro_dev})
+ ro_dev_fs_type=$(blkid -o value -s TYPE -p ${ro_dev} 2> /dev/null)
+
+ dd of="/cowspace/${img_name}.cow" count=0 seek=${ro_dev_size} &> /dev/null
+ _next_loop_dev
+ rw_dev=$(_make_loop_dev "/cowspace/${img_name}.cow")
+
+ echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} N 8" | dmsetup create ${img_name}
+
+ msg ":: Mounting '/dev/mapper/${img_name}' (${ro_dev_fs_type}) to '${mnt}'"
+ if ! mount -t "${ro_dev_fs_type}" "/dev/mapper/${img_name}" "${mnt}" ; then
+ echo "ERROR: while mounting '/dev/mapper/${img_name}' to '${mnt}'"
+ launch_interactive_shell
+ fi
}
# args: /path/to/image_file, mountpoint
-_mnt_squashfs() {
- img="${1}"
- mnt="${2}"
- img_fullname="${img##*/}";
- img_name="${img_fullname%.*}"
- tmp_mnt="/ro_branch/${img_name}"
-
- if [ "${copytoram}" = "y" ]; then
+_mnt_sfs() {
+ local img="${1}"
+ local mnt="${2}"
+ local img_fullname="${img##*/}";
+
+ mkdir -p "${mnt}"
+
+ if [[ "${copytoram}" == "y" ]]; then
msg -n ":: Copying squashfs image to RAM..."
- /bin/cp "${img}" "/copytoram/${img_fullname}"
- if [ $? -ne 0 ]; then
- echo "ERROR: while copy ${img} to /copytoram/${img_fullname}"
+ if ! cp "${img}" "/copytoram/${img_fullname}" ; then
+ echo "ERROR: while copy '${img}' to '/copytoram/${img_fullname}'"
launch_interactive_shell
fi
img="/copytoram/${img_fullname}"
msg "done."
fi
-
- mkdir -p "${tmp_mnt}"
- /bin/mount -r -t squashfs "${img}" "${tmp_mnt}"
- if [ $? -ne 0 ]; then
- echo "ERROR: while mounting ${img} to ${tmp_mnt}"
+ _next_loop_dev
+ msg ":: Mounting '${img}' (SquashFS) to '${mnt}'"
+ if ! mount -r -t squashfs $(_make_loop_dev "${img}") "${mnt}" &> /dev/null ; then
+ echo "ERROR: while mounting '${img}' to '${mnt}'"
launch_interactive_shell
fi
-
- if [ "/${mnt#/*/}" = "/" ]; then
- _mnt_aufs "${tmp_mnt}" "${mnt}"
- else
- _mnt_bind "${tmp_mnt}" "${mnt}"
- fi
}
run_hook() {
- if [ "x${arch}" = "x" ]; then
- arch="$(uname -m)"
- fi
-
- if [ "x${rw_branch_size}" = "x" ]; then
- rw_branch_size="75%"
- fi
-
- if [ "x${copytoram_size}" = "x" ]; then
- copytoram_size="75%"
- fi
-
- if [ "x${archisobasedir}" = "x" ]; then
- archisobasedir="arch"
- fi
-
- if [ "x${isomounts}" != "x" ]; then
- isomounts="/bootmnt/${isomounts}"
+ [[ -z "${arch}" ]] && arch="$(uname -m)"
+ [[ -z "${cowspace_size}" ]] && cowspace_size="75%"
+ [[ -z "${copytoram_size}" ]] && copytoram_size="75%"
+ [[ -z "${archisobasedir}" ]] && archisobasedir="arch"
+ [[ -z "${archisodevice}" ]] && archisodevice="/dev/disk/by-label/${archisolabel}"
+ if [[ -z "${aitab}" ]]; then
+ aitab="/bootmnt/${archisobasedir}/aitab"
else
- isomounts="/bootmnt/${archisobasedir}/isomounts"
+ aitab="/bootmnt/${aitab}"
fi
-
- if [ "x${archisodevice}" = "x" ]; then
- archisodevice="/dev/disk/by-label/${archisolabel}"
- fi
-
# set mount handler for archiso
mount_handler="archiso_mount_handler"
}
+# This function is called normally from init script, but it can be called
+# as chain from other mount handlers.
+# args: /path/to/newroot
archiso_mount_handler() {
- newroot="${1}"
+ local newroot="${1}"
+ local fstype fserror
+
+ _init_loop_dev
msg ":: Waiting for boot device..."
- while ! poll_device ${archisodevice} 30; do
+ while ! poll_device "${archisodevice}" 30; do
echo "ERROR: boot device didn't show up after 30 seconds..."
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
launch_interactive_shell
done
- FSTYPE=$(blkid -o value -s TYPE -p ${archisodevice} 2> /dev/null)
- if [ -n "${FSTYPE}" ]; then
- if mount -r -t "${FSTYPE}" ${archisodevice} /bootmnt > /dev/null 2>&1; then
- if [ -e "${isomounts}" ]; then
- echo "SUCCESS: Mounted archiso volume successfully."
- fserror="0"
+ fstype=$(blkid -o value -s TYPE -p "${archisodevice}" 2> /dev/null)
+ if [[ -n "${fstype}" ]]; then
+ if mount -r -t "${fstype}" "${archisodevice}" /bootmnt; then
+ if [[ -f "${aitab}" ]]; then
+ msg ":: Mounted archiso volume successfully."
+ fserror=0
else
- echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist."
- fserror="1"
+ echo "ERROR: Mounting was successful, but the '${aitab}' file does not exist."
+ fserror=1
fi
else
- echo "ERROR; Failed to mount ${archisodevice} (FS is ${FSTYPE})"
- fserror="1"
+ echo "ERROR; Failed to mount '${archisodevice}' (FS is ${fstype})"
+ fserror=1
fi
else
- echo "ERROR: ${archisodevice} found, but the filesystem type is unknown."
- fserror="1"
+ echo "ERROR: '${archisodevice}' found, but the filesystem type is unknown."
+ fserror=1
fi
- if [ "${fserror}" = "1" ]; then
+ if [[ ${fserror} -eq 1 ]]; then
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
launch_interactive_shell
fi
- if [ "${copytoram}" = "y" ]; then
+ if [[ "${copytoram}" == "y" ]]; then
msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..."
mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram
msg "done."
fi
- msg -n ":: Mounting rw_branch (tmpfs) filesystem, size=${rw_branch_size}..."
- mount -t tmpfs -o "size=${rw_branch_size}",mode=0755 rw_branch /rw_branch
+ msg -n ":: Mounting /cowspace (tmpfs) filesystem, size=${cowspace_size}..."
+ mount -t tmpfs -o "size=${cowspace_size}",mode=0755 cowspace /cowspace
msg "done."
- msg ":: Mounting root (aufs) filesystem"
- /bin/mount -t aufs -o dirs=/rw_branch=rw union "${newroot}"
- if [ $? -ne 0 ]; then
- echo "ERROR: while mounting root (aufs) filesystem."
- launch_interactive_shell
- fi
-
- msg ":: Mounting images"
- while read img imgarch mountpoint type; do
- # check if this line is a comment (starts with #)
- [ "${img#"#"}" != "${img}" ] && continue
-
- [ "$imgarch" != "$arch" ] && continue
-
- [ ! -r "/bootmnt/${archisobasedir}/${img}" ] && continue
-
- if [ "${type}" = "bind" ]; then
- _mnt_bind "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
- elif [ "${type}" = "squashfs" ]; then
- _mnt_squashfs "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
+ local aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size
+ while read aitab_img aitab_mnt aitab_arch aitab_sfs_comp aitab_fs_type aitab_fs_size; do
+ [[ "${aitab_img#\#}" != "${aitab_img}" ]] && continue
+ [[ "${aitab_arch}" != "any" && "${aitab_arch}" != "${arch}" ]] && continue
+ if [[ "${aitab_fs_type}" != "none" ]]; then
+ if [[ "${aitab_sfs_comp}" != "none" ]]; then
+ _mnt_sfs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.fs.sfs" "/sfs/${aitab_img}"
+ _mnt_fs "/sfs/${aitab_img}/${aitab_img}.fs" "${newroot}${aitab_mnt}"
+ else
+ _mnt_fs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.fs" "${newroot}${aitab_mnt}"
+ fi
+ else
+ _mnt_sfs "/bootmnt/${archisobasedir}/${aitab_arch}/${aitab_img}.sfs" "${newroot}${aitab_mnt}"
fi
- done < "${isomounts}"
+ done < "${aitab}"
- if [ "${copytoram}" = "y" ]; then
- /bin/umount /bootmnt
+ if [[ "${copytoram}" == "y" ]]; then
+ umount /bootmnt
else
- _mnt_bind /bootmnt "${newroot}/bootmnt"
+ mkdir "${newroot}/bootmnt"
+ mount --bind /bootmnt "${newroot}/bootmnt"
fi
}