update

[dedimark]

uname -a
6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) x86_64 GNU/Linux

lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 12 (bookworm)
Release: 12
Codename: bookworm

/usr/bin/IPIPDirect_loader eth0
libbpf: elf: legacy map definitions in 'maps' section are not supported by libbpf v1.0+
ERROR: opening BPF object file failed
Unable to load program
Error attaching TC egress filter. TC cannot attach to filter. Command => tc filter add dev eth0 egress prio 1 handle 1 bpf da obj /etc/IPIPDirect/IPIPDirect_filter.o sec egress and Return Error Number => 1.

https://github.com/libbpf/libbpf/wiki/Libbpf:-the-road-to-v1.0#drop-support-for-legacy-bpf-map-declaration-syntax

can you help recompile on newest OS?

[gamemann]

Hey, are you using the correct version of LibBPF that I used with this project? You should have the following commit checked out under src/include/libbpf.

https://github.com/libbpf/libbpf/tree/97ada10bd834950b1856c7f9efacc9ee83f824cf

In regards to porting this project to the latest version of LibBPF, I might do that in the future, but I'm not sure when I'll have the time.

[dedimark]

yes, libbpf correct version.

git clone --recursive https://github.com/gamemann/IPIPDirect-TC.git
Cloning into 'IPIPDirect-TC'...
remote: Enumerating objects: 85, done.
remote: Counting objects: 100% (85/85), done.
remote: Compressing objects: 100% (59/59), done.
remote: Total 85 (delta 39), reused 70 (delta 24), pack-reused 0
Receiving objects: 100% (85/85), 271.87 KiB | 3.02 MiB/s, done.
Resolving deltas: 100% (39/39), done.
Submodule 'src/include/libbpf' (https://github.com/libbpf/libbpf.git) registered for path 'src/include/libbpf'
Cloning into '/root/IPIPDirect-TC/src/include/libbpf'...
remote: Enumerating objects: 12184, done.
remote: Counting objects: 100% (3393/3393), done.
remote: Compressing objects: 100% (858/858), done.
remote: Total 12184 (delta 2539), reused 2622 (delta 2450), pack-reused 8791
Receiving objects: 100% (12184/12184), 9.21 MiB | 18.67 MiB/s, done.
Resolving deltas: 100% (8197/8197), done.
Submodule path 'src/include/libbpf': checked out '97ada10bd834950b1856c7f9efacc9ee83f824cf'

[dedimark]

Hey,any news?

[gamemann]

Hi, I've pushed an update to the project that should work with the latest version of LibBPF.

I wasn't able to test the TC program's functionality itself since I no longer run this in production, but confirmed attaching/detaching from the TC egress filter works.

# TC filter egress programs loaded.
christian@dev-debian12:~$ sudo tc filter show dev enp1s0 egress
filter protocol all pref 49152 bpf chain 0 
filter protocol all pref 49152 bpf chain 0 handle 0x1 tc_egress:[399] direct-action not_in_hw id 399 name tc_egress tag 245416d498d264d0 jited 

# Ensuring mac_map is populated meaning new map pinning works.
christian@dev-debian12:~$ sudo bpftool map dump name mac_map
[{
        "key": 0,
        "value": 156300082273574
    }
]

Please let me know how it goes and ensure you update LibBPF to the latest version when pulling the new changes.

[dedimark]

git clone --recursive https://github.com/gamemann/IPIPDirect-TC.git

Cloning into 'IPIPDirect-TC'...
remote: Enumerating objects: 119, done.
remote: Counting objects: 100% (119/119), done.
remote: Compressing objects: 100% (77/77), done.
remote: Total 119 (delta 57), reused 100 (delta 38), pack-reused 0
Receiving objects: 100% (119/119), 277.08 KiB | 3.96 MiB/s, done.
Resolving deltas: 100% (57/57), done.
Submodule 'src/include/libbpf' (https://github.com/libbpf/libbpf.git) registered for path 'src/include/libbpf'
Cloning into '/root/IPIPDirect-TC/src/include/libbpf'...
remote: Enumerating objects: 12602, done.
remote: Counting objects: 100% (3811/3811), done.
remote: Compressing objects: 100% (985/985), done.
remote: Total 12602 (delta 2838), reused 2949 (delta 2720), pack-reused 8791
Receiving objects: 100% (12602/12602), 9.60 MiB | 16.75 MiB/s, done.
Resolving deltas: 100% (8496/8496), done.
Submodule path 'src/include/libbpf': checked out 'c1a6c770c46c6e78ad6755bf596c23a4e6f6b216'

root@vultr:~/IPIPDirect-TC# make

make[1]: Leaving directory '/root/IPIPDirect-TC/src/include/libbpf/src'
clang -lelf -lz -o build/IPIPDirect_loader src/include/libbpf/src/staticobjs/bpf_prog_linfo.o src/include/libbpf/src/staticobjs/bpf.o src/include/libbpf/src/staticobjs/btf_dump.o src/include/libbpf/src/staticobjs/btf_iter.o src/include/libbpf/src/staticobjs/btf_relocate.o src/include/libbpf/src/staticobjs/btf.o src/include/libbpf/src/staticobjs/elf.o src/include/libbpf/src/staticobjs/features.o src/include/libbpf/src/staticobjs/gen_loader.o src/include/libbpf/src/staticobjs/hashmap.o src/include/libbpf/src/staticobjs/libbpf_errno.o src/include/libbpf/src/staticobjs/libbpf_probes.o src/include/libbpf/src/staticobjs/libbpf.o src/include/libbpf/src/staticobjs/linker.o src/include/libbpf/src/staticobjs/netlink.o src/include/libbpf/src/staticobjs/nlattr.o src/include/libbpf/src/staticobjs/relo_core.o src/include/libbpf/src/staticobjs/ringbuf.o src/include/libbpf/src/staticobjs/str_error.o src/include/libbpf/src/staticobjs/strset.o src/include/libbpf/src/staticobjs/usdt.o src/include/libbpf/src/staticobjs/zip.o src/IPIPDirect_loader.c
clang -O2 --target=bpf -g -c src/IPIPDirect_kern.c -o build/IPIPDirect_filter.o
In file included from src/IPIPDirect_kern.c:14:
src/include/bpf_helpers.h:4:10: fatal error: 'bpf/bpf_helpers.h' file not found
#include <bpf/bpf_helpers.h>
^~~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Makefile:22: kern] Error 1

I can't compile

src/include/bpf_helpers.h:4:10: fatal error: 'bpf/bpf_helpers.h' file not found
#include <bpf/bpf_helpers.h>

[gamemann]

I'll look into this later. It likely works on my VM because I've installed xdp-tools on the system. You could try installing that along with LibBPF to see if it corrects the error you're getting in the meantime.

[dedimark]

uname -a
Linux vultr 6.1.0-22-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.94-1 (2024-06-21) x86_64 GNU/Linux

apt-get install xdp-tools
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
xdp-tools is already the newest version (1.3.1-1).

--

make
make -C src/include/libbpf/src
make[1]: Entering directory '/root/IPIPDirect-TC/src/include/libbpf/src'
make[1]: Leaving directory '/root/IPIPDirect-TC/src/include/libbpf/src'
clang -lelf -lz -o build/IPIPDirect_loader src/include/libbpf/src/staticobjs/bpf_prog_linfo.o src/include/libbpf/src/staticobjs/bpf.o src/include/libbpf/src/staticobjs/btf_dump.o src/include/libbpf/src/staticobjs/btf_iter.o src/include/libbpf/src/staticobjs/btf_relocate.o src/include/libbpf/src/staticobjs/btf.o src/include/libbpf/src/staticobjs/elf.o src/include/libbpf/src/staticobjs/features.o src/include/libbpf/src/staticobjs/gen_loader.o src/include/libbpf/src/staticobjs/hashmap.o src/include/libbpf/src/staticobjs/libbpf_errno.o src/include/libbpf/src/staticobjs/libbpf_probes.o src/include/libbpf/src/staticobjs/libbpf.o src/include/libbpf/src/staticobjs/linker.o src/include/libbpf/src/staticobjs/netlink.o src/include/libbpf/src/staticobjs/nlattr.o src/include/libbpf/src/staticobjs/relo_core.o src/include/libbpf/src/staticobjs/ringbuf.o src/include/libbpf/src/staticobjs/str_error.o src/include/libbpf/src/staticobjs/strset.o src/include/libbpf/src/staticobjs/usdt.o src/include/libbpf/src/staticobjs/zip.o src/IPIPDirect_loader.c
clang -O2 --target=bpf -g -c src/IPIPDirect_kern.c -o build/IPIPDirect_filter.o
In file included from src/IPIPDirect_kern.c:14:
src/include/bpf_helpers.h:4:10: fatal error: 'bpf/bpf_helpers.h' file not found
#include <bpf/bpf_helpers.h>
^~~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Makefile:22: kern] Error 1

same.