[shunnag]

Enable CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_MULTIPLE_TABLES, so ip rule works. This is the kernel part of #139.

After PPP comes up, modem.py adds a default route via ppp0 in table 1000 and runs ip rule add from <ip> table 1000. Neither arm64 defconfig nor vamos.config sets these options, so on the released kernel the rule fails with Operation not supported and modem.py tears down the routes and retries. On master LTE still goes through ModemManager, so today this only matters on liberation-day-7.2.

Key test (details and the other runs are in #139): comma four on liberation-day-7.2, the same userland in both runs (unmodified modem.py, test stand-ins for killall and resolvectl on PATH), about 10 min with Wi-Fi, then about 5 min without.

kernel	result
released (7.2.0-vamos-7626c37)	ip rule fails 4.6/min, pppd killed each time (90 pppd PIDs). modem.log: route install failed (ip rule add from <ip> table 1000): RTNETLINK answers: Operation not supported 70 times, route set up 0 times. Without Wi-Fi: no LTE default route, name lookups fail.
with these 2 lines (c2a60cf)	held: one pppd, no route changes, name lookups OK with and without Wi-Fi

So fixing the userland alone is not enough. c2a60cf is a local test build that also has the 4 NAT lines from #134 and ath10k Wi-Fi patches (#135 and a series on linux-wireless; not LTE), swapped in as boot.img only; one run each.

Config check: a build with only these 2 lines at this position differs from the released kernel's embedded config only in IP_ADVANCED_ROUTER, IP_MULTIPLE_TABLES and FIB_RULES (ikconfig_R0_vs_R3_2lines.txt). I did not boot it. ikconfig_R0_vs_R1.txt shows the config of the tested build (taken from e9735b3, the same config without the ath10k patches).

Based on master like #134; it also applies to liberation-day-7.2, and I can retarget it. The 2 lines go after CONFIG_IPV6=y, so this PR, #134 and #110 merge without conflicts (local git merge).

Not tested: master, IPv6, a full image build.

I worked through this with Claude (AI). English is hard for me, so AI helped write the English. I ran all the device tests myself on my comma four.
ikconfig_R0_vs_R1.txt
ikconfig_R0_vs_R3_2lines.txt

[github-actions]

vamOS System Profile

Changes vs master

Metric	Change
Used space	3558.0MB → 3559.2MB (+1.1MB)
Sparse image	3507.3MB → 3509.3MB (+2.0MB)
Package count	529 → 529

Added packages: MesaLib-devel-26.2.5_2, NetworkManager-1.58.1_1, SPIRV-LLVM-Translator22-22.1.7_1, Vulkan-Headers-1.4.363.0_1, ca-certificates-20250419+3.131.1_2, freetype-2.15.0_1, freetype-devel-2.15.0_1, gawk-5.4.1_1, gdb-18.1_1, gdb-common-18.1_1, libgbm-26.2.5_2, libgbm-devel-26.2.5_2, libnm-1.58.1_1, mesa-26.2.5_2, mesa-dri-26.2.5_2, mesa-libgallium-26.2.5_2, mesa-opencl-26.2.5_2, vulkan-loader-1.4.363.0_1, vulkan-loader-devel-1.4.363.0_1

Removed packages: MesaLib-devel-26.2.5_1, NetworkManager-1.56.0_1, SPIRV-LLVM-Translator22-22.1.6_1, Vulkan-Headers-1.4.357.0_1, ca-certificates-20250419+3.127_1, freetype-2.14.3_1, freetype-devel-2.14.3_1, gawk-5.3.2_1, gdb-17.2_1, gdb-common-17.2_1, libgbm-26.2.5_1, libgbm-devel-26.2.5_1, libnm-1.56.0_1, mesa-26.2.5_1, mesa-dri-26.2.5_1, mesa-libgallium-26.2.5_1, mesa-opencl-26.2.5_1, vulkan-loader-1.4.357.0_1, vulkan-loader-devel-1.4.357.0_1

Directory size changes (>1MB)

Directory	Change

---

Metric	Value
Used space	3559.2MB / 5959.5MB
Files	54787
Directories	4696
Symlinks	3389
Packages	529

Top 10 Directories

Directory	Size

Category Breakdown

Category	Size	%
xbps packages	2654.8MB	74.5%
Python venv	591.8MB	16.6%
Firmware	11.2MB	.3%
Other	301.2MB	8.4%

Top 10 Packages by Size

Package	Size
mit-krb5-libs-1.21.3_1	270.4MB
gawk-5.4.1_1	210.3MB
llvm-21_3	141.5MB
libllvm21-21.1.8_1	134.6MB
libldns-1.9.2_1	124.3MB
pd-mapper-1.0_1	74MB
glib-2.88.3_1	67.4MB
gcc-14.2.1+20250405_4	67.1MB
libclang-cpp21-21.1.8_1	58.4MB
libcap-progs-2.78_1	56MB

Top 30 Files by Size

File	Size
/usr/lib/llvm/22/lib/libLLVM.so.22.1	134.5MB
/usr/lib/llvm/21/lib/libLLVM.so.21.1	124.3MB
/usr/lib/llvm/21/lib/libMLIR.so.21.1	89.7MB
/usr/lib/llvm/21/bin/mlir-transform-opt	82.9MB
/usr/lib/llvm/22/lib/libclang-cpp.so.22.1	58.4MB
/usr/lib/llvm/21/lib/libclang-cpp.so.21.1	56MB
/usr/lib/llvm/21/bin/mlir-translate	53.2MB
/usr/lib/llvm/21/bin/llvm-exegesis	52MB
/usr/lib/llvm/21/bin/llvm-bolt-binary-analysis	50.6MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/gnat1	40.1MB
/usr/bin/gdb	39.5MB
/usr/lib/libgallium-26.2.5.so	38.5MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1plus	37.3MB
/usr/lib/libRusticlOpenCL.so.1.0.0	35.5MB
/usr/lib/libllvm-qcom.so	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/lto1	33.9MB
/usr/bin/lto-dump	33.9MB
/usr/local/venv/bin/ruff	31.8MB
/usr/share/icu/78.3/icudt78l.dat	31.5MB
/usr/lib/llvm/21/lib/libclang.so.21.1.8	30.2MB
/usr/bin/uv	30.2MB
/usr/lib/libz3.so	28.8MB
/usr/lib/llvm/21/bin/c-index-test	28.6MB
/usr/local/venv/lib/python3.12/site-packages/gcc_arm_none_eabi/toolchain/libexec/gcc/arm-none-eabi/13.2.1/cc1	28.2MB
/usr/bin/run	26.8MB
/usr/local/venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-71e1b124.so	23.6MB
/usr/comma/updater	23.5MB
/usr/comma/setup	23.5MB
/usr/comma/reset	23.5MB