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[archiso] Add dm_snap_prefix= boot param.

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Default value is "arch". This implies that all device mapper node
for snapshot devices will be for example: arch_root-image.

This helps AIF to hidden these devices from "Device Configuration".

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
This commit is contained in:
Gerardo Exequiel Pozzi 2011-08-09 16:28:52 -03:00
parent b3f918ee60
commit 57d2ea1f4b
2 changed files with 8 additions and 4 deletions
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2
README
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@ -43,6 +43,8 @@ INDEX
Size is in bytes (suffix with "k", "m" and "g") or
in percentage of available RAM.
Default: "75%"
* dm_snap_prefix= Set a prefix for device-mapper snapshot node names.
Default: "arch"
* arch= Force an architecture type (i686 | x86_64).
Do not set it for normal operations.
Useful for running a 64 bit kernel / 32 bit userspace.

10
archiso/hooks/archiso
View File

@ -29,6 +29,7 @@ _mnt_fs() {
local mnt="${2}"
local img_fullname="${img##*/}";
local img_name="${img_fullname%%.*}"
local dm_snap_name="${dm_snap_prefix}_${img_name}"
local ro_dev ro_dev_size ro_dev_fs_type rw_dev
mkdir -p "${mnt}"
@ -42,11 +43,11 @@ _mnt_fs() {
_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}
echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} N 8" | dmsetup create ${dm_snap_name}
msg ":: Mounting '/dev/mapper/${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 '${mnt}'"
msg ":: Mounting '/dev/mapper/${dm_snap_name}' (${ro_dev_fs_type}) to '${mnt}'"
if ! mount -t "${ro_dev_fs_type}" "/dev/mapper/${dm_snap_name}" "${mnt}" ; then
echo "ERROR: while mounting '/dev/mapper/${dm_snap_name}' to '${mnt}'"
launch_interactive_shell
fi
}
@ -81,6 +82,7 @@ run_hook() {
[[ -z "${cowspace_size}" ]] && cowspace_size="75%"
[[ -z "${copytoram_size}" ]] && copytoram_size="75%"
[[ -z "${archisobasedir}" ]] && archisobasedir="arch"
[[ -z "${dm_snap_prefix}" ]] && dm_snap_prefix="arch"
[[ -z "${archisodevice}" ]] && archisodevice="/dev/disk/by-label/${archisolabel}"
if [[ -z "${aitab}" ]]; then
aitab="/bootmnt/${archisobasedir}/aitab"