#! /bin/bash

#

# Called as filter-modules.sh list-of-modules Arch

# This script filters the modules into the kernel-core and kernel-modules

# subpackages.  We list out subsystems/subdirs to prune from the installed

# module directory.  What is left is put into the kernel-core package.  What is

# pruned is contained in the kernel-modules package.

#

# This file contains the default subsys/subdirs to prune from all architectures.

# If an architecture needs to differ, we source a per-arch filter-<arch>.sh file

# that contains the set of override lists to be used instead.  If a module or

# subsys should be in kernel-modules on all arches, please change the defaults

# listed here.

# Overrides is individual modules which need to remain in kernel-core due to deps.

overrides="cec"

# Set the default dirs/modules to filter out

driverdirs="atm auxdisplay bcma bluetooth firewire fpga infiniband leds media memstick mfd mmc mtd nfc ntb pcmcia platform power ssb soundwire staging tty uio w1"

chardrvs="mwave pcmcia"

netdrvs="appletalk can dsa hamradio ieee802154 ppp slip usb wireless"

ethdrvs="3com adaptec alteon amd aquantia atheros broadcom cadence calxeda chelsio cisco dec dlink emulex marvell mellanox neterion nvidia packetengines qlogic rdc sfc silan sis smsc stmicro sun tehuti ti wiznet xircom"

inputdrvs="gameport tablet touchscreen"

scsidrvs="aacraid aic7xxx be2iscsi bfa bnx2i bnx2fc csiostor cxgbi esas2r fcoe fnic isci libsas lpfc megaraid mpt3sas mvsas pm8001 qla2xxx qla4xxx sym53c8xx_2 ufs qedf"

usbdrvs="atm image misc serial"

fsdrvs="affs befs coda cramfs dlm ecryptfs hfs hfsplus jfs jffs2 minix nilfs2 ocfs2 reiserfs romfs squashfs sysv ubifs ufs"

netprots="6lowpan appletalk atm ax25 batman-adv bluetooth can dsa ieee802154 l2tp mac80211 mac802154 mpls netrom nfc rds rfkill rose sctp smc wireless"

drmdrvs="amd ast bridge gma500 i2c i915 mgag200 nouveau panel radeon"

singlemods="ntb_netdev iscsi_ibft iscsi_boot_sysfs megaraid pmcraid qedi qla1280 9pnet_rdma rpcrdma nvmet-rdma nvme-rdma hid-picolcd hid-prodikeys hwpoison-inject target_core_user sbp_target cxgbit  chcr parport_serial regmap-sdw hid-asus iTCO_wdt rnbd-client rnbd-server mlx5_vdpa"

# Grab the arch-specific filter list overrides

source ./filter-$2.sh

filter_dir() {

	filelist=$1

	dir=$2

	grep -v -e "${dir}/" ${filelist} > ${filelist}.tmp

	if [ $? -ne 0 ]

	then

		echo "Couldn't remove ${dir}.  Skipping."

	else

		grep -e "${dir}/" ${filelist} >> k-d.list

		mv ${filelist}.tmp $filelist

	fi

	return 0

}

filter_ko() {

	filelist=$1

	mod=$2

	grep -v -e "${mod}.ko" ${filelist} > ${filelist}.tmp

	if [ $? -ne 0 ]

	then

		echo "Couldn't remove ${mod}.ko  Skipping."

	else

		grep -e "${mod}.ko" ${filelist} >> k-d.list

		mv ${filelist}.tmp $filelist

	fi

	return 0

}

# Filter the drivers/ subsystems

for subsys in ${driverdirs}

do

	filter_dir $1 drivers/${subsys}

done

# Filter the networking drivers

for netdrv in ${netdrvs}

do

	filter_dir $1 drivers/net/${netdrv}

done

# Filter the char drivers

for char in ${chardrvs}

do

	filter_dir $1 drivers/char/${char}

done

# Filter the ethernet drivers

for eth in ${ethdrvs}

do

	filter_dir $1 drivers/net/ethernet/${eth}

done

# SCSI

for scsi in ${scsidrvs}

do

	filter_dir $1 drivers/scsi/${scsi}

done

# Input

for input in ${inputdrvs}

do

	filter_dir $1 drivers/input/${input}

done

# USB

for usb in ${usbdrvs}

do

	filter_dir $1 drivers/usb/${usb}

done

# Filesystems

for fs in ${fsdrvs}

do

	filter_dir $1 fs/${fs}

done

# Network protocols

for prot in ${netprots}

do

	filter_dir $1 kernel/net/${prot}

done

# DRM

for drm in ${drmdrvs}

do

	filter_dir $1 drivers/gpu/drm/${drm}

done

# Just kill sound.

filter_dir $1 kernel/sound

# Now go through and filter any single .ko files that might have deps on the

# things we filtered above

for mod in ${singlemods}

do

        filter_ko $1 ${mod}

done

# Now process the override list to bring those modules back into core

for mod in ${overrides}

do

	grep -v -e "/${mod}.ko" k-d.list > k-d.list.tmp

	if [ $? -ne 0 ]

        then

                echo "Couldn't save ${mod}.ko  Skipping."

        else

                grep -e "/${mod}.ko" k-d.list >> $filelist

                mv k-d.list.tmp k-d.list

        fi

done

# Go through our generated drivers list and remove the .ko files.  We'll

# restore them later.

for mod in `cat k-d.list`

do

	rm -rf $mod

done