[arch-releng] [PATCH 1/1] add boot params archisoflags= and cow_flags= for mount options

[Christian Hesse]

From: Christian Hesse <mail at 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 at 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".
-- 
2.6.2