Hi Andrii and toke,
I have sovled this issue. The reason is that my iproute2 does not
support libbpf, once I compile iproute2 with libbpf, it works. Thanks
for reply!
在 2021/7/14 10:02 AM, luwei (O) 写道:
I tried 5.13 version in this page:
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git , still
failed with the same error.
在 2021/7/14 9:05 AM, luwei (O) 写道:
I have updated the iproute2 according this page:
https://github.com/cilium/cilium/issues/7446
Now I use this version of iproute2:
https://github.com/shemminger/iproute2
The version of iproute2 is 5.11, and the kernel version is 5.13(the
latest version).
在 2021/7/14 1:07 AM, Toke Høiland-Jørgensen 写道:
Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> writes:
On Mon, Jul 12, 2021 at 11:35 PM luwei (O) <luwei32@xxxxxxxxxx> wrote:
Hi, List:
I am a beginner about bpf and working on XDP now. I meet a
problem and feel difficult to figure it out.
In my following codes, I use two ways to define my_map: in
SEC
maps and SEC .maps respectively. When I load the xdp_kern.o file,
It has different results. The way I load is: ip link set dev ens3 xdp
obj xdp1_kern.o sec xdp1.
when I define my_map using SEC maps, it loads successfully
but
fails to load using SEC .maps, it reports:
"
[12] TYPEDEF __u32 type_id=13
[13] INT unsigned int size=4 bits_offset=0 nr_bits=32 encoding=(none)
[14] FUNC_PROTO (anon) return=2 args=(10 ctx)
[15] FUNC xdp_prog1 type_id=14
[16] INT char size=1 bits_offset=0 nr_bits=8 encoding=SIGNED
[17] ARRAY (anon) type_id=16 index_type_id=4 nr_elems=4
[18] VAR _license type_id=17 linkage=1
[19] DATASEC .maps size=0 vlen=1 size == 0
Prog section 'xdp1' rejected: Permission denied (13)!
- Type: 6
- Instructions: 9 (0 over limit)
- License: GPL
Verifier analysis:
0: (b7) r1 = 0
1: (63) *(u32 *)(r10 -4) = r1
last_idx 1 first_idx 0
regs=2 stack=0 before 0: (b7) r1 = 0
2: (bf) r2 = r10
3: (07) r2 += -4
4: (18) r1 = 0x0
this shouldn't be 0x0.
I suspect you have an old iproute2 which doesn't yet use libbpf to
load BPF programs, so .maps definition is not yet supported. cc'ing
netdev@vger, David and Toke
That would be my guess as well; what's the output of 'ip -V'?
-Toke
.
--
Best Regards,
Lu Wei
