#! /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 fmc fpga infiniband isdn leds media memstick mfd mmc mtd nfc ntb pcmcia platform power ssb soundwire staging tty uio uwb w1"

chardrvs="mwave pcmcia"

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

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

inputdrvs="gameport tablet touchscreen"

scsidrvs="aacraid advansys aic7xxx aic94xx be2iscsi bfa bnx2i bnx2fc csiostor cxgbi esas2r fcoe fnic isci libsas lpfc megaraid mpt2sas mpt3sas mvsas pm8001 qla2xxx qla4xxx sym53c8xx_2 ufs qedf wd719x"

usbdrvs="atm image misc serial wusbcore"

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

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

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

iiodrvs="accel adc afe common dac gyro health humidity light magnetometer multiplexer orientation potentiometer potentiostat pressure temperature"

singlemods="ntb_netdev iscsi_ibft iscsi_boot_sysfs megaraid pmcraid qedi qla1280 9pnet_rdma rpcrdma nvmet-rdma nvme-rdma hid-picolcd hid-prodikeys hwa-hc hwpoison-inject target_core_user sbp_target cxgbit iw_cxgb3 iw_cxgb4 cxgb3i cxgb3i cxgb3i_ddp cxgb4i chcr chtls 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 $1 drivers/char/${input}

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