** Description changed:
+ 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
+ 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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https://bugs.launchpad.net/bugs/2069407
Title:
ubuntu_bpf failed to build on Noble / Oracular
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