btrfs improvements and fixes (#2970)

archinstall/lib/disk/device_handler.py

@@ -599,12 +599,12 @@ def create_lvm_btrfs_subvolumes(
 
 		self.mount(path, self._TMP_BTRFS_MOUNT, create_target_mountpoint=True)
 
-		for sub_vol in btrfs_subvols:
+		for sub_vol in sorted(btrfs_subvols, key=lambda x: x.name):
 			debug(f'Creating subvolume: {sub_vol.name}')
 
 			subvol_path = self._TMP_BTRFS_MOUNT / sub_vol.name
 
-			SysCommand(f"btrfs subvolume create {subvol_path}")
+			SysCommand(f"btrfs subvolume create -p {subvol_path}")
 
 			if BtrfsMountOption.nodatacow.value in mount_options:
 				try:
@@ -653,12 +653,12 @@ def create_btrfs_volumes(
 			options=part_mod.mount_options
 		)
 
-		for sub_vol in part_mod.btrfs_subvols:
+		for sub_vol in sorted(part_mod.btrfs_subvols, key=lambda x: x.name):
 			debug(f'Creating subvolume: {sub_vol.name}')
 
 			subvol_path = self._TMP_BTRFS_MOUNT / sub_vol.name
 
-			SysCommand(f"btrfs subvolume create {subvol_path}")
+			SysCommand(f"btrfs subvolume create -p {subvol_path}")
 
 		self.umount(dev_path)
 

archinstall/lib/disk/subvolume_menu.py

@@ -59,7 +59,8 @@ def _add_subvolume(self, preset: SubvolumeModification | None = None) -> Subvolu
 		path = prompt_dir(
 			str(_("Subvolume mountpoint")),
 			header=header,
-			allow_skip=True
+			allow_skip=True,
+			validate=False
 		)
 
 		if not path:

archinstall/lib/installer.py

@@ -361,7 +361,7 @@ def _mount_btrfs_subvol(
 		subvolumes: list[disk.SubvolumeModification],
 		mount_options: list[str] = []
 	) -> None:
-		for subvol in subvolumes:
+		for subvol in sorted(subvolumes, key=lambda x: x.relative_mountpoint):
 			mountpoint = self.target / subvol.relative_mountpoint
 			mount_options = mount_options + [f'subvol={subvol.name}']
 			disk.device_handler.mount(dev_path, mountpoint, options=mount_options)