kernel/linux.git/lib/test_bpf.c, branch v5.10.92

bpf/tests: Do not PASS tests without actually testing the result

2021-09-18T11:40:21+00:00

[ Upstream commit 2b7e9f25e590726cca76700ebdb10e92a7a72ca1 ] Each test case can have a set of sub-tests, where each sub-test can run the cBPF/eBPF test snippet with its own data_size and expected result. Before, the end of the sub-test array was indicated by both data_size and result being zero. However, most or all of the internal eBPF tests has a data_size of zero already. When such a test also had an expected value of zero, the test was never run but reported as PASS anyway. Now the test runner always runs the first sub-test, regardless of the data_size and result values. The sub-test array zero-termination only applies for any additional sub-tests. There are other ways fix it of course, but this solution at least removes the surprise of eBPF tests with a zero result always succeeding. Signed-off-by: Johan Almbladh Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210721103822.3755111-1-johan.almbladh@anyfinetworks.com Signed-off-by: Sasha Levin

bpf/tests: Fix copy-and-paste error in double word test

2021-09-18T11:40:21+00:00

[ Upstream commit ae7f47041d928b1a2f28717d095b4153c63cbf6a ] This test now operates on DW as stated instead of W, which was already covered by another test. Signed-off-by: Johan Almbladh Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210721104058.3755254-1-johan.almbladh@anyfinetworks.com Signed-off-by: Sasha Levin

bpf: revert "test_bpf: Flag tests that cannot be jited on s390"

2020-07-16T18:52:43+00:00

This reverts commit 3203c9010060 ("test_bpf: flag tests that cannot be jited on s390"). The s390 bpf JIT previously had a restriction on the maximum program size, which required some tests in test_bpf to be flagged as expected failures. The program size limitation has been removed, and the tests now pass, so these tests should no longer be flagged. Fixes: d1242b10ff03 ("s390/bpf: Remove JITed image size limitations") Signed-off-by: Seth Forshee Signed-off-by: Daniel Borkmann Reviewed-by: Ilya Leoshkevich Link: https://lore.kernel.org/bpf/20200716143931.330122-1-seth.forshee@canonical.com

bpf/tests: Use migrate disable instead of preempt disable

2020-02-25T00:20:09+00:00

Replace the preemption disable/enable with migrate_disable/enable() to reflect the actual requirement and to allow PREEMPT_RT to substitute it with an actual migration disable mechanism which does not disable preemption. [ tglx: Switched it over to migrate disable ] Signed-off-by: David S. Miller Signed-off-by: Thomas Gleixner Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200224145643.785306549@linutronix.de

bpf, testing: Introduce 'gso_linear_no_head_frag' skb_segment test

2019-10-30T15:37:08+00:00

Following reports of skb_segment() hitting a BUG_ON when working on GROed skbs which have their gso_size mangled (e.g. after a bpf_skb_change_proto call), add a reproducer test that mimics the input skbs that lead to the mentioned BUG_ON as in [1] and validates the fix submitted in [2]. [1] https://lists.openwall.net/netdev/2019/08/26/110 [2] commit 3dcbdb134f32 ("net: gso: Fix skb_segment splat when splitting gso_size mangled skb having linear-headed frag_list") Signed-off-by: Shmulik Ladkani Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20191025134223.2761-3-shmulik.ladkani@gmail.com

bpf, testing: Refactor test_skb_segment() for testing skb_segment() on different skbs

2019-10-30T15:37:01+00:00

Currently, test_skb_segment() builds a single test skb and runs skb_segment() on it. Extend test_skb_segment() so it processes an array of numerous skb/feature pairs to test. Signed-off-by: Shmulik Ladkani Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20191025134223.2761-2-shmulik.ladkani@gmail.com

test_bpf: Fix a new clang warning about xor-ing two numbers

2019-08-20T15:07:29+00:00

r369217 in clang added a new warning about potential misuse of the xor operator as an exponentiation operator: ../lib/test_bpf.c:870:13: warning: result of '10 ^ 300' is 294; did you mean '1e300'? [-Wxor-used-as-pow] { { 4, 10 ^ 300 }, { 20, 10 ^ 300 } }, ~~~^~~~~ 1e300 ../lib/test_bpf.c:870:13: note: replace expression with '0xA ^ 300' to silence this warning ../lib/test_bpf.c:870:31: warning: result of '10 ^ 300' is 294; did you mean '1e300'? [-Wxor-used-as-pow] { { 4, 10 ^ 300 }, { 20, 10 ^ 300 } }, ~~~^~~~~ 1e300 ../lib/test_bpf.c:870:31: note: replace expression with '0xA ^ 300' to silence this warning The commit link for this new warning has some good logic behind wanting to add it but this instance appears to be a false positive. Adopt its suggestion to silence the warning but not change the code. According to the differential review link in the clang commit, GCC may eventually adopt this warning as well. Link: https://github.com/ClangBuiltLinux/linux/issues/643 Link: https://github.com/llvm/llvm-project/commit/920890e26812f808a74c60ebc14cc636dac661c1 Signed-off-by: Nathan Chancellor Acked-by: Yonghong Song Signed-off-by: Daniel Borkmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295

2019-06-05T15:36:38+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 64 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.894819585@linutronix.de Signed-off-by: Greg Kroah-Hartman

bpf: test_bpf: turn off preemption in function __run_once

2019-02-25T21:18:07+00:00

When running BPF test suite the following splat occurs: [ 415.930950] test_bpf: #0 TAX jited:0 [ 415.931067] BUG: assuming atomic context at lib/test_bpf.c:6674 [ 415.946169] in_atomic(): 0, irqs_disabled(): 0, pid: 11556, name: modprobe [ 415.953176] INFO: lockdep is turned off. [ 415.957207] CPU: 1 PID: 11556 Comm: modprobe Tainted: G W 5.0.0-rc7-next-20190220 #1 [ 415.966328] Hardware name: HiKey Development Board (DT) [ 415.971592] Call trace: [ 415.974069] dump_backtrace+0x0/0x160 [ 415.977761] show_stack+0x24/0x30 [ 415.981104] dump_stack+0xc8/0x114 [ 415.984534] __cant_sleep+0xf0/0x108 [ 415.988145] test_bpf_init+0x5e0/0x1000 [test_bpf] [ 415.992971] do_one_initcall+0x90/0x428 [ 415.996837] do_init_module+0x60/0x1e4 [ 416.000614] load_module+0x1de0/0x1f50 [ 416.004391] __se_sys_finit_module+0xc8/0xe0 [ 416.008691] __arm64_sys_finit_module+0x24/0x30 [ 416.013255] el0_svc_common+0x78/0x130 [ 416.017031] el0_svc_handler+0x38/0x78 [ 416.020806] el0_svc+0x8/0xc Rework so that preemption is disabled when we loop over function 'BPF_PROG_RUN(...)'. Fixes: 568f196756ad ("bpf: check that BPF programs run with preemption disabled") Suggested-by: Arnd Bergmann Signed-off-by: Anders Roxell Signed-off-by: Daniel Borkmann

net: remove VLAN_TAG_PRESENT

2018-11-17T03:25:29+00:00

Replace VLAN_TAG_PRESENT with single bit flag and free up VLAN.CFI overload. Now VLAN.CFI is visible in networking stack and can be passed around intact. Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller