Hi. So, we clarified that some of the problems were not caused by the kernel at all. The only thing missing is support to probe_read_kernel and probe_read_user on 4.15 kernels. Is that needed for the offering?
If I didn't get it right, I am sorry. So, in order for us to meet your expectations, I'll try to understand better what are the needs here: 1) Do you want support on 4.15 kernel on Ubuntu 18.04, right? Or is the offering based on Ubuntu 20.04? 2) Do you expect to be able to use LLVM/clang 10? Or is LLVM/clang 8 sufficient for your needs? The bug has only been open for the linux package, so we would need to get folks behind LLVM involved, or try to fix this on the kernel somehow, which might delay things a little. Being able to use LLVM/clang 8, it seems, would be a best fit to a short deadline. 3) Building and running samples/bpf/ is not something we test. And though it might help us catch regressions, I would suppose it's not a requirement for the offering. If I am wrong in that supposition, are you relying on the source package for something? Or is anything shipped in binary packages incorrect (like that s930x typo) preventing things from building correctly? Right now, the best course we have, in case what you need is the probe functions on 4.15 is to get this available on a kernel in -proposed in 3 weeks, and in -updates in 6 weeks. Would that work? Thank you. Cascardo. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1888507 Title: [UBUNTU 18.04] BPF programs fail on Ubuntu s390x Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: New Status in linux source package in Bionic: In Progress Bug description: We need to run BPF filters to analyse and monitor network traffic. The BPF filters are created by skydive (http://skydive.network). Currently skydive fails to install BPF filters on s390x (using Ubuntu 18.04 currently, soon moving to Ubuntu 20.04). Because of these failures, we decided to try the BPF samples that come with the kernel first. These samples also fail on s390x while they work fine on Intel. shense@boe-build:~/bionic/samples/bpf$ uname -a Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC 2020 s390x s390x s390x GNU/Linux Example instructions: sudo apt install -y dpkg-dev clang llvm libelf-dev sudo apt-get source linux-image-unsigned-$(uname -r) cd linux-4.15.0/ make headers_install make samples/bpf/ Errors: shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map [sudo] password for shense: invalid relo for insn[4].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test invalid relo for insn[22].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1888507/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
