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#! /bin/bash
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#
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# Called as filter-modules.sh list-of-modules Arch
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# This script filters the modules into the kernel-core and kernel-modules
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# subpackages.  We list out subsystems/subdirs to prune from the installed
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# module directory.  What is left is put into the kernel-core package.  What is
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# pruned is contained in the kernel-modules package.
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#
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# This file contains the default subsys/subdirs to prune from all architectures.
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# If an architecture needs to differ, we source a per-arch filter-<arch>.sh file
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# that contains the set of override lists to be used instead.  If a module or
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# subsys should be in kernel-modules on all arches, please change the defaults
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# listed here.
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# Overrides is individual modules which need to remain in kernel-core due to deps.
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overrides="cec"
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# Set the default dirs/modules to filter out
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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"
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chardrvs="mwave pcmcia"
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netdrvs="appletalk can dsa hamradio ieee802154 irda ppp slip usb wireless"
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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"
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inputdrvs="gameport tablet touchscreen"
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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"
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usbdrvs="atm image misc serial wusbcore"
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fsdrvs="affs befs coda cramfs dlm ecryptfs hfs hfsplus jfs jffs2 minix ncpfs nilfs2 ocfs2 reiserfs romfs squashfs sysv ubifs ufs"
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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"
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drmdrvs="amd ast bridge gma500 i2c i915 mgag200 nouveau panel radeon"
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iiodrvs="accel adc afe common dac gyro health humidity light magnetometer multiplexer orientation potentiometer potentiostat pressure temperature"
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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"
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# Grab the arch-specific filter list overrides
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source ./filter-$2.sh
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filter_dir() {
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	filelist=$1
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	dir=$2
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	grep -v -e "${dir}/" ${filelist} > ${filelist}.tmp
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	if [ $? -ne 0 ]
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	then
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		echo "Couldn't remove ${dir}.  Skipping."
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	else
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		grep -e "${dir}/" ${filelist} >> k-d.list
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		mv ${filelist}.tmp $filelist
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	fi
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	return 0
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}
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filter_ko() {
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	filelist=$1
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	mod=$2
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	grep -v -e "${mod}.ko" ${filelist} > ${filelist}.tmp
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	if [ $? -ne 0 ]
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	then
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		echo "Couldn't remove ${mod}.ko  Skipping."
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	else
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		grep -e "${mod}.ko" ${filelist} >> k-d.list
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		mv ${filelist}.tmp $filelist
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	fi
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	return 0
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}
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# Filter the drivers/ subsystems
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for subsys in ${driverdirs}
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do
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	filter_dir $1 drivers/${subsys}
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done
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# Filter the networking drivers
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for netdrv in ${netdrvs}
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do
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	filter_dir $1 drivers/net/${netdrv}
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done
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# Filter the char drivers
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for char in ${chardrvs}
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do
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	filter_dir $1 drivers/char/${input}
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done
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# Filter the ethernet drivers
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for eth in ${ethdrvs}
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do
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	filter_dir $1 drivers/net/ethernet/${eth}
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done
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# SCSI
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for scsi in ${scsidrvs}
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do
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	filter_dir $1 drivers/scsi/${scsi}
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done
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# Input
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for input in ${inputdrvs}
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do
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	filter_dir $1 drivers/input/${input}
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done
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# USB
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for usb in ${usbdrvs}
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do
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	filter_dir $1 drivers/usb/${usb}
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done
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# Filesystems
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for fs in ${fsdrvs}
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do
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	filter_dir $1 fs/${fs}
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done
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# Network protocols
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for prot in ${netprots}
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do
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	filter_dir $1 kernel/net/${prot}
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done
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# DRM
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for drm in ${drmdrvs}
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do
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	filter_dir $1 drivers/gpu/drm/${drm}
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done
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# Just kill sound.
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filter_dir $1 kernel/sound
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# Now go through and filter any single .ko files that might have deps on the
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# things we filtered above
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for mod in ${singlemods}
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do
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        filter_ko $1 ${mod}
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done
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# Now process the override list to bring those modules back into core
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for mod in ${overrides}
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do
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	grep -v -e "/${mod}.ko" k-d.list > k-d.list.tmp
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	if [ $? -ne 0 ]
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        then
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                echo "Couldn't save ${mod}.ko  Skipping."
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        else
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                grep -e "/${mod}.ko" k-d.list >> $filelist
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                mv k-d.list.tmp k-d.list
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        fi
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done
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# Go through our generated drivers list and remove the .ko files.  We'll
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# restore them later.
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for mod in `cat k-d.list`
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do
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	rm -rf $mod
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done