diff options
| author | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2019-10-22 12:37:13 +0200 |
|---|---|---|
| committer | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2019-11-03 00:26:17 +0100 |
| commit | 19724e28c81e3ff642f09c49f612cd147c54a697 (patch) | |
| tree | 278c45d3b1563cee6108e65c3b5856dbab304062 /target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming | |
| parent | 0975c35b83a632f9662d1944307f87da9db06154 (diff) | |
| download | upstream-19724e28c81e3ff642f09c49f612cd147c54a697.tar.gz upstream-19724e28c81e3ff642f09c49f612cd147c54a697.tar.bz2 upstream-19724e28c81e3ff642f09c49f612cd147c54a697.zip | |
ramips: split base-files into subtargets
While most of the target's contents are split into subtargets, the
base-files are maintained for the target as a whole.
However, OpenWrt already implements a mechanism that will use (and
even prefer) files in the subtargets' directories. This can be
exploited to make several scripts subtarget-specific and thus save
some space.
In certain cases, keeping files in parent (=target) base-files was
more convenient, and thus no splitting was performed for those.
Note that this will increase overall code lines, but reduce code
per subtarget.
base-files ipk size reduction:
master (mt7621) 60958 B
split (mt7620) 46358 B (- 14.3 kiB)
split (mt7621) 48759 B (- 11.9 kiB)
split (mt76x8) 44948 B (- 15.6 kiB)
split (rt288x) 43508 B (- 17.0 kiB)
split (rt305x) 45616 B (- 15.0 kiB)
split (rt3883) 44176 B (- 16.4 kiB)
Run-tested on:
GL.iNet GL-MT300N-V2 (mt76x8)
D-Link DWR-116 (mt7620)
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Diffstat (limited to 'target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming')
| -rw-r--r-- | target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming b/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming new file mode 100644 index 0000000000..e2aef5f1f2 --- /dev/null +++ b/target/linux/ramips/rt3883/base-files/lib/preinit/04_handle_checksumming @@ -0,0 +1,32 @@ +#!/bin/sh + +# Netgear WNCE2001 has does a checksum check on boot and goes into recovery +# tftp mode when the check fails. Initializing the JFFS2 partition triggers +# this, so we make sure to zero checksum and size to be checksummed before +# that happens, so this needs to run very early during boot. + +do_checksumming_disable() { + . /lib/functions.sh + + local board=$(board_name) + + case "$board" in + asus,rt-n56u) + echo "Board is ASUS RT-N56U, replacing uImage header..." + local firmware_mtd=$(find_mtd_part firmware) + local rootfs_mtd=$(find_mtd_part rootfs) + local rootfs_data_mtd=$(find_mtd_part rootfs_data) + local rootfs_len=$(grep \"rootfs\" /proc/mtd | awk -F' ' '{print "0x"$2}') + local rootfs_data_len=$(grep \"rootfs_data\" /proc/mtd | awk -F' ' '{print "0x"$2}') + local offset=$(echo "$rootfs_len $rootfs_data_len 0x40" | awk -F' ' '{printf "%i",$1-$2-$3}') + local signature=$(dd if=$rootfs_mtd skip=$offset bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"') + if [ "$signature" = "27051956" ]; then + dd conv=notrunc if=$rootfs_mtd skip=$offset of=$firmware_mtd bs=1 count=64 2>/dev/null + fi + ;; + esac + + return 0 +} + +boot_hook_add preinit_main do_checksumming_disable |