Couldn't find a BPF file when load xdp-filter

[kp0zhiqian]

Dear developers,

I'm a newbie of xdp, when I tried to use the xdp-tools, some error occurred. It's really appreciated that you could take a look at this issue and kindly reply it.

When I make in the /xdp-tools, xdp-filter, loader is ok, but when it goes to xdp-dump, errors popped up:

xdpdump_bpf.c:25:18: error: unknown attribute 'preserve_access_index' ignored [-Werror,-Wunknown-attributes]
} __attribute__((preserve_access_index));
                 ^
xdpdump_bpf.c:33:18: error: unknown attribute 'preserve_access_index' ignored [-Werror,-Wunknown-attributes]
} __attribute__((preserve_access_index));
                 ^
xdpdump_bpf.c:42:18: error: unknown attribute 'preserve_access_index' ignored [-Werror,-Wunknown-attributes]
} __attribute__((preserve_access_index));
                 ^
3 errors generated.
make[1]: *** [../lib/common.mk:88: xdpdump_bpf.o] Error 1
make: *** [Makefile:26: xdp-dump] Error 2

I supposed that this won't affect the usage of xdp-filter, but when I issue ./xdp-filter load -m skb <$nic_name> , another three errors poped up:

Couldn't find a BPF file with name xdp-dispatcher.o
Couldn't open BPF file
Couldn't attach XDP program on iface 'enp68s0f0': No such file or directory(-2)

I think I must miss something that caused this issue, but I have no clue...

Thanks in advance!!

[tohojo]

You need LLVM 10 to compile xdp-tools :)

[kp0zhiqian]

You need LLVM 10 to compile xdp-tools :)

@tohojo Thanks a lot！