mirror of
https://github.com/lgcosta/pf-linux-port.git
synced 2026-11-12 23:38:03 -03:00
lgcosta
dff2185b20
- Demo docs replaced by the screencast docs (single source of truth): the legacy demo-session.sh/demo-record.py and the v0.9 renderer were removed instead of being kept as a second convention. - feature-matrix: stale 'M2-in-progress' vocabulary gone; the rows the 15 gates prove now say VERIFIED-in-VM and name the gate; af-to is now an explicit non-goal row (INET6 0 in this build). - guide: the queues/divert/pflog sections described a state that no longer exists (priq-only, divert dropping packets, pflog logging nothing); they now describe the shipped behaviour. - vm-lab: the 15 real gates with what each proves, 15/15 green, and the pf0 -> cli/srv/gw2 ssh setup the screencasts rely on. - install/build: pdivert and pflogd are built and ported (docs said otherwise); module object list now includes hfsc.c, fq_codel.c, pfk_pflog.c; the screencast pipeline is an optional build stage. - pf-guide: the 'M2 scope only' framing is gone; honest gaps listed. - caveats: three new sections about the screencast pipeline (MiniMax video generation blocked by the account tier, narration as a separate track, a video frame is not a verdict). - porting-notes: what the recording taught us. - README/README.pt-BR: status, milestones, layout and video section updated. All internal doc links verified.
119 lines
4.8 KiB
Markdown
119 lines
4.8 KiB
Markdown
# Applying the PF-on-Linux patch set / build guide
|
||
|
||
Both languages: this file is mirrored at `docs/pt-BR/install.md`.
|
||
|
||
Target: Linux **7.3.4** source tree + out-of-tree modules `pf.ko`
|
||
(PF engine, divert(4) family, ifq queues). The port is currently delivered
|
||
as a **source tree + zero core patches** (see patches/kernel/README.md):
|
||
the module links against symbols the stock 7.3.4 kernel already exports.
|
||
|
||
## 1. Prerequisites
|
||
|
||
| Requirement | Why |
|
||
|---|---|
|
||
| gcc >= 15, GNU make, flex, bison, bc | kernel + pfctl build |
|
||
| `glibc-static` (or musl-static) | static pfctl for guest VMs |
|
||
| Linux 7.3.4 sources (`/home/lgcosta/lab/linux_kernel/linux-7.3.4`) | build target |
|
||
| OpenBSD 8.0 `sys.tar.gz` + `src.tar.gz` | ported sources (fetched + sha256-verified by script; primary mirror openbsd.c3sl.ufpr.br, fallback cdn.openbsd.org) |
|
||
| root on the build host | module signing not configured; `insmod` as root |
|
||
|
||
## 2. Steps
|
||
|
||
```sh
|
||
cd pf_port
|
||
|
||
# 2.1 fetch + verify OpenBSD 8.0 sources (checksums pinned in VERSIONS)
|
||
./scripts/fetch-sources.sh
|
||
./scripts/vendorize.sh # stages _vendor/upstream + IDS.txt
|
||
|
||
# 2.2 prepare the kernel tree (config + build + external-module prep)
|
||
KERNELDIR=/path/to/linux-7.3.4 ./scripts/build-kernel.sh
|
||
# - defconfig + virtio/ext4 built-in (direct kernel boot for the VM lab)
|
||
# - make bzImage modules_prepare
|
||
# - copies vmlinux.symvers -> Module.symvers (needed by M= builds)
|
||
|
||
# 2.3 apply kernel core patches (currently NONE are required)
|
||
./scripts/apply-patches.sh /path/to/linux-7.3.4
|
||
# patches/kernel/series is empty by design; if future milestones need
|
||
# exports, each lands as 000N-*.patch documented in docs/*/patches.md.
|
||
|
||
# 2.4 build the module and userland
|
||
./scripts/build-module.sh # -> module/pf.ko
|
||
make -C tools # -> tools/out/pfctl (static)
|
||
|
||
# 2.5 install on a running 7.3.4 system
|
||
sudo insmod module/pf.ko # creates /dev/pf (0600 root)
|
||
sudo cp tools/out/pfctl /usr/local/sbin/
|
||
sudo pfctl -e # enable
|
||
sudo pfctl -f /etc/pf.conf # real OpenBSD 8.0 syntax
|
||
```
|
||
|
||
## 3. Verify
|
||
|
||
```sh
|
||
pfctl -s info # "Status: Enabled", live counters
|
||
pfctl -nf /etc/pf.conf # parse-only check
|
||
dmesg | grep pfk # hooks registered (netisr wq data path)
|
||
```
|
||
|
||
VM end-to-end suite (Alpine 3.22 on libvirt): `./scripts/vm-create.sh`,
|
||
`./scripts/vm-deploy.sh`, `./scripts/vm-run-tests.sh` — see
|
||
`docs/en/vm-lab.md`.
|
||
|
||
## 4. Uninstall / revert
|
||
|
||
```sh
|
||
sudo pfctl -d; sudo rmmod pf # flushes rulesets/states
|
||
./scripts/unpatch.sh /path/to/linux-7.3.4 # reverse-applies any future patches
|
||
```
|
||
|
||
## 5. What "applied" means here
|
||
|
||
Because the deliverable is an out-of-tree module, "applying the patch set"
|
||
= steps 2.1–2.4; the untouched Linux tree is only *configured and built*
|
||
(virtio/EXT4 =y) — no source files are modified unless a future milestone
|
||
adds a documented `patches/kernel/000N-*.patch` (all such patches: one
|
||
section each in docs/en/patches.md with what/why/impact/revert).
|
||
|
||
## 6. Notes on the steps above (2026-11-12)
|
||
|
||
- Step **2.3 is a documented no-op today**: the patch set is empty and
|
||
`scripts/apply-patches.sh` / `scripts/unpatch.sh` / `patches/kernel/series`
|
||
are not yet in the tree (they land with the first real core patch — see
|
||
[patches.md](patches.md)). You can safely skip 2.3.
|
||
- Step 2.4 builds every userland tool: `make -C tools` targets are `pfctl`,
|
||
`pdivert`, `pflogd` and the ABI harness (`abitest`, `abi`, `test`, `clean`).
|
||
- After 2.5, the whole feature set is usable and gated by the lab suite —
|
||
filtering with state, tables and anchors, NAT (`nat-to`/`rdr-to`/`binat-to`
|
||
plus pools), scrub, forced routing (`route-to`/`dup-to`/`reply-to`),
|
||
`divert`, `pflog` and the OpenBSD 8.0 queues (HFSC). The
|
||
[feature matrix](feature-matrix.md) says which gate proves what; read
|
||
[pf-guide.md](pf-guide.md) for the deviations before enabling PF on a path
|
||
you need.
|
||
|
||
## 6.1 Optional: the narrated screencasts
|
||
|
||
```sh
|
||
export MINIMAX_API_KEY=... # MiniMax TTS for the narration
|
||
./scripts/vm-create.sh # the lab must be up
|
||
./scripts/screencast/build-all.sh # -> out/screencast/{en,pt}/*.mp4
|
||
```
|
||
|
||
It records real shell sessions against the lab, generates the narration with
|
||
a MiniMax female voice (English and Portuguese) and renders 1080p30 MP4s
|
||
with burned-in subtitles and the lab's network diagram. Details:
|
||
[screencast.md](screencast.md).
|
||
|
||
## 7. Where to go next
|
||
|
||
| | |
|
||
|---|---|
|
||
| Architecture, one page | [guide.md](guide.md) |
|
||
| Build stages in detail | [build.md](build.md) |
|
||
| VM validation lab | [vm-lab.md](vm-lab.md) |
|
||
| Daily rulesets & warnings | [pf-guide.md](pf-guide.md) |
|
||
| Known divergences | [caveats.md](caveats.md) |
|
||
| Core patch mechanism | [patches.md](patches.md) |
|
||
| Narrated screencasts | [screencast.md](screencast.md) |
|
||
| Doc index | [README.md](README.md) |
|