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Message #07577
[Bug 2069407] Re: ubuntu_bpf failed to build on Noble / Oracular
This bug is awaiting verification that the linux-ibm-gt-
tdx/6.8.0-1027.28+tdx1 kernel in -proposed solves the problem. Please
test the kernel and update this bug with the results. If the problem is
solved, change the tag 'verification-needed-noble-linux-ibm-gt-tdx' to
'verification-done-noble-linux-ibm-gt-tdx'. If the problem still exists,
change the tag 'verification-needed-noble-linux-ibm-gt-tdx' to
'verification-failed-noble-linux-ibm-gt-tdx'.
If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!
** Tags added: kernel-spammed-noble-linux-ibm-gt-tdx-v2 verification-needed-noble-linux-ibm-gt-tdx
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https://bugs.launchpad.net/bugs/2069407
Title:
ubuntu_bpf failed to build on Noble / Oracular
Status in ubuntu-kernel-tests:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Noble:
Fix Released
Status in linux source package in Oracular:
Fix Released
Bug description:
SRU Justification
[Impact]
BPF selftests fail to build on Noble and Oracular. This happens because of
commit 02b4e126e6 ("bpf: selftests: test_tunnel: Use vmlinux.h declarations"),
which relies on the definitions of `bpf_fou_encap` and
`bpf_fou_encap_type` used in test_tunnel_kern.c being on vmlinux.h.
Since we have CONFIG_NET_FOU=m instead of =y, these declarations
cannot be solved and the tests cannot be built.
[Fix]
Clean cherry-pick of d17f9b370df6 ("selftests/bpf: Fix compilation failure when
CONFIG_NET_FOU!=y")
[Test]
1) Install build dependencies:
apt install build-essential libelf-dev llvm clang lld libssl-dev docutils-common -y
2) Build the tests using the kernel source tree with the patch applied:
make -C tools/testing/selftests/ TARGETS=bpf SKIP_TARGETS= all KDIR=/usr/src/linux-headers-$(uname -r)/
[Where problems could occur]
Change is limited to BPF selftests, no problems should occur in the kernel
image or modules.
--------------------------------------------------------------------------------
Original bug report:
Test build failed since 6.8.0-19.19 (probably way more earlier, this
is earliest one that I can see):
CLNG-BPF [test_maps] test_tcpnotify_kern.bpf.o
CLNG-BPF [test_maps] test_time_tai.bpf.o
CLNG-BPF [test_maps] test_trace_ext.bpf.o
CLNG-BPF [test_maps] test_trace_ext_tracing.bpf.o
CLNG-BPF [test_maps] test_tracepoint.bpf.o
CLNG-BPF [test_maps] test_trampoline_count.bpf.o
CLNG-BPF [test_maps] test_tunnel_kern.bpf.o
make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf'
make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests'
stderr:
Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'
Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'
progs/test_tunnel_kern.c:30:13: error: declaration of 'struct bpf_fou_encap' will not be visible outside of this function [-Werror,-Wvisibility]
30 | struct bpf_fou_encap *encap, int type) __ksym;
| ^
progs/test_tunnel_kern.c:32:13: error: declaration of 'struct bpf_fou_encap' will not be visible outside of this function [-Werror,-Wvisibility]
32 | struct bpf_fou_encap *encap) __ksym;
| ^
progs/test_tunnel_kern.c:741:23: error: variable has incomplete type 'struct bpf_fou_encap'
741 | struct bpf_fou_encap encap = {};
| ^
progs/test_tunnel_kern.c:741:9: note: forward declaration of 'struct bpf_fou_encap'
741 | struct bpf_fou_encap encap = {};
| ^
progs/test_tunnel_kern.c:765:43: error: use of undeclared identifier 'FOU_BPF_ENCAP_GUE'
765 | ret = bpf_skb_set_fou_encap(skb, &encap, FOU_BPF_ENCAP_GUE);
| ^
progs/test_tunnel_kern.c:778:23: error: variable has incomplete type 'struct bpf_fou_encap'
778 | struct bpf_fou_encap encap = {};
| ^
progs/test_tunnel_kern.c:778:9: note: forward declaration of 'struct bpf_fou_encap'
778 | struct bpf_fou_encap encap = {};
| ^
progs/test_tunnel_kern.c:802:43: error: use of undeclared identifier 'FOU_BPF_ENCAP_FOU'
802 | ret = bpf_skb_set_fou_encap(skb, &encap, FOU_BPF_ENCAP_FOU);
| ^
progs/test_tunnel_kern.c:816:23: error: variable has incomplete type 'struct bpf_fou_encap'
816 | struct bpf_fou_encap encap = {};
| ^
progs/test_tunnel_kern.c:816:9: note: forward declaration of 'struct bpf_fou_encap'
816 | struct bpf_fou_encap encap = {};
| ^
7 errors generated.
make[1]: *** [Makefile:620: /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/test_tunnel_kern.bpf.o] Error 1
make: *** [Makefile:180: all] Error 2
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