On 11/27/2015 09:04 AM, Christian Hesse wrote:

From: Christian Hesse <mail@eworm.de>

Having files on btrfs subvolumes requires to give mount options. Add boot params archisoflags= and cow_flags= for this purpose. Boot parameters could look like this:

... archisodevice=/dev/sdaX archisoflags=subvolume=isos cow_device=/dev/sdaX cow_flags=subvolume=persist ...

Signed-off-by: Christian Hesse <mail@eworm.de> --- archiso/initcpio/hooks/archiso | 4 ++-- docs/README.bootparams | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/archiso/initcpio/hooks/archiso b/archiso/initcpio/hooks/archiso index 3edc76c..4f2b538 100644 --- a/archiso/initcpio/hooks/archiso +++ b/archiso/initcpio/hooks/archiso @@ -135,7 +135,7 @@ archiso_mount_handler() { local newroot="${1}"

if ! mountpoint -q "/run/archiso/bootmnt"; then - _mnt_dev "${archisodevice}" "/run/archiso/bootmnt" "-r" + _mnt_dev -o "${archisoflags-defaults}" "${archisodevice}" "/run/archiso/bootmnt" "-r" if [[ "${copytoram}" != "y" ]]; then echo $(readlink -f ${archisodevice}) >> /run/archiso/used_block_devices fi @@ -164,7 +164,7 @@ archiso_mount_handler() { fi

if [[ -n "${cow_device}" ]]; then - _mnt_dev "${cow_device}" "/run/archiso/cowspace" "-r" + _mnt_dev -o "${cow_flags-defaults}" "${cow_device}" "/run/archiso/cowspace" "-r" echo $(readlink -f ${cow_device}) >> /run/archiso/used_block_devices mount -o remount,rw "/run/archiso/cowspace" else diff --git a/docs/README.bootparams b/docs/README.bootparams index 356375d..45df437 100644 --- a/docs/README.bootparams +++ b/docs/README.bootparams @@ -21,6 +21,8 @@ INDEX Default: (unset) * archisodevice= Set the device node where archiso medium is located. Default: "/dev/disk/by-label/${archisolabel}" +* archisoflags= Set extra mount options, e.g. for btrfs subvolumes. + Default: (unset) * archisobasedir= Set the base directory where all files reside. Default: "arch" * copytoram= If set to "y" or just "copytoram" without arguments, @@ -35,6 +37,8 @@ INDEX Default: (unset) * cow_device= Like cow_label= but using device node. Default: (unset) or "/dev/disk/by-label/${cow_label}" +* cow_flags= Set extra mount options, e.g. for btrfs subvolumes. + Default: (unset) * cow_directory= Set a directory inside ${cow_device}. Default: "/persistent_${archisolabel}/${arch}" * cow_persistent= Set if snapshot is persistent "P" or non-persistent "N".

Nice! Please follow the way to set "default" settings like other things in archiso @run_hook() Thanks you!