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2020-01-24libbpf: Improve handling of failed CO-RE relocationsAndrii Nakryiko
Previously, if libbpf failed to resolve CO-RE relocation for some instructions, it would either return error immediately, or, if .relaxed_core_relocs option was set, would replace relocatable offset/imm part of an instruction with a bogus value (-1). Neither approach is good, because there are many possible scenarios where relocation is expected to fail (e.g., when some field knowingly can be missing on specific kernel versions). On the other hand, replacing offset with invalid one can hide programmer errors, if this relocation failue wasn't anticipated. This patch deprecates .relaxed_core_relocs option and changes the approach to always replacing instruction, for which relocation failed, with invalid BPF helper call instruction. For cases where this is expected, BPF program should already ensure that that instruction is unreachable, in which case this invalid instruction is going to be silently ignored. But if instruction wasn't guarded, BPF program will be rejected at verification step with verifier log pointing precisely to the place in assembly where the problem is. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200124053837.2434679-1-andriin@fb.com
2020-01-24selftests: bpf: Reset global state between reuseport test runsLorenz Bauer
Currently, there is a lot of false positives if a single reuseport test fails. This is because expected_results and the result map are not cleared. Zero both after individual test runs, which fixes the mentioned false positives. Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200124112754.19664-5-lmb@cloudflare.com
2020-01-24selftests: bpf: Make reuseport test output more legibleLorenz Bauer
Include the name of the mismatching result in human readable format when reporting an error. The new output looks like the following: unexpected result result: [1, 0, 0, 0, 0, 0] expected: [0, 0, 0, 0, 0, 0] mismatch on DROP_ERR_INNER_MAP (bpf_prog_linum:153) check_results:FAIL:382 Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200124112754.19664-4-lmb@cloudflare.com
2020-01-24selftests: bpf: Ignore FIN packets for reuseport testsLorenz Bauer
The reuseport tests currently suffer from a race condition: FIN packets count towards DROP_ERR_SKB_DATA, since they don't contain a valid struct cmd. Tests will spuriously fail depending on whether check_results is called before or after the FIN is processed. Exit the BPF program early if FIN is set. Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200124112754.19664-3-lmb@cloudflare.com
2020-01-24selftests: bpf: Use a temporary file in test_sockmapLorenz Bauer
Use a proper temporary file for sendpage tests. This means that running the tests doesn't clutter the working directory, and allows running the test on read-only filesystems. Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200124112754.19664-2-lmb@cloudflare.com
2020-01-24mptcp: add basic kselftest for mptcpFlorian Westphal
Add mptcp_connect tool: xmit two files back and forth between two processes, several net namespaces including some adding delays, losses and reordering. Wrapper script tests that data was transmitted without corruption. The "-c" command line option for mptcp_connect.sh is there for debugging: The script will use tcpdump to create one .pcap file per test case, named according to the namespaces, protocols, and connect address in use. For example, the first test case writes the capture to ns1-ns1-MPTCP-MPTCP-10.0.1.1.pcap. The stderr output from tcpdump is printed after the test completes to show tcpdump's "packets dropped by kernel" information. Also check that userspace can't create MPTCP sockets when mptcp.enabled sysctl is off. The "-b" option allows to tune/lower send buffer size. "-m mmap" can be used to test blocking io. Default is non-blocking io using read/write/poll. Will run automatically on "make kselftest". Note that the default timeout of 45 seconds is used even if there is a "settings" changing it to 450. 45 seconds should be enough in most cases but this depends on the machine running the tests. A fix to correctly read the "settings" file has been proposed upstream but not applied yet. It is not blocking the execution of these new tests but it would be nice to have it: https://patchwork.kernel.org/patch/11204935/ Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Co-developed-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24bpftool: Print function linkage in BTF dumpAndrii Nakryiko
Add printing out BTF_KIND_FUNC's linkage. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20200124054317.2459436-1-andriin@fb.com
2020-01-24selftests/bpf: Improve bpftool changes detectionAndrii Nakryiko
Detect when bpftool source code changes and trigger rebuild within selftests/bpf Makefile. Also fix few small formatting problems. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20200124054148.2455060-1-andriin@fb.com
2020-01-24selftests/bpf: Initialize duration variable before usingJohn Sperbeck
The 'duration' variable is referenced in the CHECK() macro, and there are some uses of the macro before 'duration' is set. The clang compiler (validly) complains about this. Sample error: .../selftests/bpf/prog_tests/fexit_test.c:23:6: warning: variable 'duration' is uninitialized when used here [-Wuninitialized] if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .../selftests/bpf/test_progs.h:134:25: note: expanded from macro 'CHECK' if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _CHECK(condition, tag, duration, format) ^~~~~~~~ Signed-off-by: John Sperbeck <jsperbeck@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200123235144.93610-1-sdf@google.com
2020-01-23selftests/powerpc: Enable range tests on 8xx in ptrace-hwbreak.c selftestChristophe Leroy
8xx is now able to support any range length so range tests can be enabled. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/081e3b4e3a17a8ec9fdac46b505e3a29ca15f209.1574790198.git.christophe.leroy@c-s.fr
2020-01-23tools/kvm_stat: Fix kvm_exit filter nameGavin Shan
The filter name is fixed to "exit_reason" for some kvm_exit events, no matter what architect we have. Actually, the filter name ("exit_reason") is only applicable to x86, meaning it's broken on other architects including aarch64. This fixes the issue by providing various kvm_exit filter names, depending on architect we're on. Afterwards, the variable filter name is picked and applied through ioctl(fd, SET_FILTER). Reported-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Gavin Shan <gshan@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-01-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Alexei Starovoitov says: ==================== pull-request: bpf-next 2020-01-22 The following pull-request contains BPF updates for your *net-next* tree. We've added 92 non-merge commits during the last 16 day(s) which contain a total of 320 files changed, 7532 insertions(+), 1448 deletions(-). The main changes are: 1) function by function verification and program extensions from Alexei. 2) massive cleanup of selftests/bpf from Toke and Andrii. 3) batched bpf map operations from Brian and Yonghong. 4) tcp congestion control in bpf from Martin. 5) bulking for non-map xdp_redirect form Toke. 6) bpf_send_signal_thread helper from Yonghong. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-22bpf: tcp: Add bpf_cubic exampleMartin KaFai Lau
This patch adds a bpf_cubic example. Some highlights: 1. CONFIG_HZ .kconfig map is used. 2. In bictcp_update(), calculation is changed to use usec resolution (i.e. USEC_PER_JIFFY) instead of using jiffies. Thus, usecs_to_jiffies() is not used in the bpf_cubic.c. 3. In bitctcp_update() [under tcp_friendliness], the original "while (ca->ack_cnt > delta)" loop is changed to the equivalent "ca->ack_cnt / delta" operation. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200122233658.903774-1-kafai@fb.com
2020-01-22bpf: Sync uapi bpf.h to tools/Martin KaFai Lau
This patch sync uapi bpf.h to tools/. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200122233652.903348-1-kafai@fb.com
2020-01-22selftests/bpf: Add tests for program extensionsAlexei Starovoitov
Add program extension tests that build on top of fexit_bpf2bpf tests. Replace three global functions in previously loaded test_pkt_access.c program with three new implementations: int get_skb_len(struct __sk_buff *skb); int get_constant(long val); int get_skb_ifindex(int val, struct __sk_buff *skb, int var); New function return the same results as original only if arguments match. new_get_skb_ifindex() demonstrates that 'skb' argument doesn't have to be first and only argument of BPF program. All normal skb based accesses are available. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20200121005348.2769920-4-ast@kernel.org
2020-01-22libbpf: Add support for program extensionsAlexei Starovoitov
Add minimal support for program extensions. bpf_object_open_opts() needs to be called with attach_prog_fd = target_prog_fd and BPF program extension needs to have in .c file section definition like SEC("freplace/func_to_be_replaced"). libbpf will search for "func_to_be_replaced" in the target_prog_fd's BTF and will pass it in attach_btf_id to the kernel. This approach works for tests, but more compex use case may need to request function name (and attach_btf_id that kernel sees) to be more dynamic. Such API will be added in future patches. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20200121005348.2769920-3-ast@kernel.org
2020-01-22selftests/bpf: Build urandom_read with LDFLAGS and LDLIBSDaniel Díaz
During cross-compilation, it was discovered that LDFLAGS and LDLIBS were not being used while building binaries, leading to defaults which were not necessarily correct. OpenEmbedded reported this kind of problem: ERROR: QA Issue: No GNU_HASH in the ELF binary [...], didn't pass LDFLAGS? Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com>
2020-01-22x86/decoder: Add TEST opcode to Group3-2Masami Hiramatsu
Add TEST opcode to Group3-2 reg=001b as same as Group3-1 does. Commit 12a78d43de76 ("x86/decoder: Add new TEST instruction pattern") added a TEST opcode assignment to f6 XX/001/XXX (Group 3-1), but did not add f7 XX/001/XXX (Group 3-2). Actually, this TEST opcode variant (ModRM.reg /1) is not described in the Intel SDM Vol2 but in AMD64 Architecture Programmer's Manual Vol.3, Appendix A.2 Table A-6. ModRM.reg Extensions for the Primary Opcode Map. Without this fix, Randy found a warning by insn_decoder_test related to this issue as below. HOSTCC arch/x86/tools/insn_decoder_test HOSTCC arch/x86/tools/insn_sanity TEST posttest arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this. arch/x86/tools/insn_decoder_test: warning: ffffffff81000bf1: f7 0b 00 01 08 00 testl $0x80100,(%rbx) arch/x86/tools/insn_decoder_test: warning: objdump says 6 bytes, but insn_get_length() says 2 arch/x86/tools/insn_decoder_test: warning: Decoded and checked 11913894 instructions with 1 failures TEST posttest arch/x86/tools/insn_sanity: Success: decoded and checked 1000000 random instructions with 0 errors (seed:0x871ce29c) To fix this error, add the TEST opcode according to AMD64 APM Vol.3. [ bp: Massage commit message. ] Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lkml.kernel.org/r/157966631413.9580.10311036595431878351.stgit@devnote2
2020-01-22objtool: Fix ARCH=x86_64 build errorShile Zhang
Building objtool with ARCH=x86_64 fails with: $make ARCH=x86_64 -C tools/objtool ... CC arch/x86/decode.o arch/x86/decode.c:10:22: fatal error: asm/insn.h: No such file or directory #include <asm/insn.h> ^ compilation terminated. mv: cannot stat ‘arch/x86/.decode.o.tmp’: No such file or directory make[2]: *** [arch/x86/decode.o] Error 1 ... The root cause is that the command-line variable 'ARCH' cannot be overridden. It can be replaced by 'SRCARCH', which is defined in 'tools/scripts/Makefile.arch'. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Link: https://lore.kernel.org/r/d5d11370ae116df6c653493acd300ec3d7f5e925.1579543924.git.jpoimboe@redhat.com
2020-01-22objtool: Silence build outputOlof Johansson
The sync-check.sh script prints out the path due to a "cd -" at the end of the script, even on silent builds. This isn't even needed, since the script is executed in our build instead of sourced (so it won't change the working directory of the surrounding build anyway). Just remove the cd to make the build silent. Fixes: 2ffd84ae973b ("objtool: Update sync-check.sh from perf's check-headers.sh") Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/cb002857fafa8186cfb9c3e43fb62e4108a1bab9.1579543924.git.jpoimboe@redhat.com
2020-01-21Merge 5.5-rc7 into usb-nextGreg Kroah-Hartman
We need the USB fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-20selftests: Refactor build to remove tools/lib/bpf from include pathToke Høiland-Jørgensen
To make sure no new files are introduced that doesn't include the bpf/ prefix in its #include, remove tools/lib/bpf from the include path entirely. Instead, we introduce a new header files directory under the scratch tools/ dir, and add a rule to run the 'install_headers' rule from libbpf to have a full set of consistent libbpf headers in $(OUTPUT)/tools/include/bpf, and then use $(OUTPUT)/tools/include as the include path for selftests. For consistency we also make sure we put all the scratch build files from other bpftool and libbpf into tools/build/, so everything stays within selftests/. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/157952561246.1683545.2762245552022369203.stgit@toke.dk
2020-01-20runsqslower: Support user-specified libbpf include and object pathsToke Høiland-Jørgensen
This adds support for specifying the libbpf include and object paths as arguments to the runqslower Makefile, to support reusing the libbpf version built as part of the selftests. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/157952561135.1683545.5660339645093141381.stgit@toke.dk
2020-01-20tools/runqslower: Remove tools/lib/bpf from include pathToke Høiland-Jørgensen
Since we are now consistently using the bpf/ prefix on #include directives, we don't need to include tools/lib/bpf in the include path. Remove it to make sure we don't inadvertently introduce new includes without the prefix. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952561027.1683545.1976265477926794138.stgit@toke.dk
2020-01-20perf: Use consistent include paths for libbpfToke Høiland-Jørgensen
Fix perf to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560797.1683545.7685921032671386301.stgit@toke.dk
2020-01-20bpftool: Use consistent include paths for libbpfToke Høiland-Jørgensen
Fix bpftool to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Also ensure that all includes of exported libbpf header files (those that are exported on 'make install' of the library) use bracketed includes instead of quoted. To make sure no new files are introduced that doesn't include the bpf/ prefix in its include, remove tools/lib/bpf from the include path entirely, and use tools/lib instead. Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560684.1683545.4765181397974997027.stgit@toke.dk
2020-01-20selftests: Use consistent include paths for libbpfToke Høiland-Jørgensen
Fix all selftests to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Also ensure that all includes of exported libbpf header files (those that are exported on 'make install' of the library) use bracketed includes instead of quoted. To not break the build, keep the old include path until everything has been changed to the new one; a subsequent patch will remove that. Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560568.1683545.9649335788846513446.stgit@toke.dk
2020-01-20tools/runqslower: Use consistent include paths for libbpfToke Høiland-Jørgensen
Fix the runqslower tool to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Also ensure that all includes of exported libbpf header files (those that are exported on 'make install' of the library) use bracketed includes instead of quoted. To not break the build, keep the old include path until everything has been changed to the new one; a subsequent patch will remove that. Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560457.1683545.9913736511685743625.stgit@toke.dk
2020-01-20selftests: Pass VMLINUX_BTF to runqslower MakefileToke Høiland-Jørgensen
Add a VMLINUX_BTF variable with the locally-built path when calling the runqslower Makefile from selftests. This makes sure a simple 'make' invocation in the selftests dir works even when there is no BTF information for the running kernel. Do a wildcard expansion and include the same paths for BTF for the running kernel as in the runqslower Makefile, to make it possible to build selftests without having a vmlinux in the local tree. Also fix the make invocation to use $(OUTPUT)/tools as the destination directory instead of $(CURDIR)/tools. Fixes: 3a0d3092a4ed ("selftests/bpf: Build runqslower from selftests") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560344.1683545.2723631988771664417.stgit@toke.dk
2020-01-20tools/bpf/runqslower: Fix override option for VMLINUX_BTFToke Høiland-Jørgensen
The runqslower tool refuses to build without a file to read vmlinux BTF from. The build fails with an error message to override the location by setting the VMLINUX_BTF variable if autodetection fails. However, the Makefile doesn't actually work with that override - the error message is still emitted. Fix this by including the value of VMLINUX_BTF in the expansion, and only emitting the error message if the *result* is empty. Also permit running 'make clean' even though no VMLINUX_BTF is set. Fixes: 9c01546d26d2 ("tools/bpf: Add runqslower tool to tools/bpf") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560237.1683545.17771785178857224877.stgit@toke.dk
2020-01-20selftests/bpf: Skip perf hw events test if the setup disabled itHangbin Liu
The same with commit 4e59afbbed96 ("selftests/bpf: skip nmi test when perf hw events are disabled"), it would make more sense to skip the test_stacktrace_build_id_nmi test if the setup (e.g. virtual machines) has disabled hardware perf events. Fixes: 13790d1cc72c ("bpf: add selftest for stackmap with build_id in NMI context") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200117100656.10359-1-liuhangbin@gmail.com
2020-01-20selftests/bpf: Don't check for btf fd in test_btfStanislav Fomichev
After commit 0d13bfce023a ("libbpf: Don't require root for bpf_object__open()") we no longer load BTF during bpf_object__open(), so let's remove the expectation from test_btf that the fd is not -1. The test currently fails. Before: BTF libbpf test[1] (test_btf_haskv.o): do_test_file:4152:FAIL bpf_object__btf_fd: -1 BTF libbpf test[2] (test_btf_newkv.o): do_test_file:4152:FAIL bpf_object__btf_fd: -1 BTF libbpf test[3] (test_btf_nokv.o): do_test_file:4152:FAIL bpf_object__btf_fd: -1 After: BTF libbpf test[1] (test_btf_haskv.o): OK BTF libbpf test[2] (test_btf_newkv.o): OK BTF libbpf test[3] (test_btf_nokv.o): OK Fixes: 0d13bfce023a ("libbpf: Don't require root for bpf_object__open()") Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200118010546.74279-1-sdf@google.com
2020-01-20tools/power/x86/intel-speed-select: Update versionSrinivas Pandruvada
As we added new set of mailbox commands, increment version. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-20tools/power/x86/intel-speed-select: Change the order for clos disableSrinivas Pandruvada
In turbo-freq or base-freq auto mode, for disable, first disable the feature and then disable clos. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-20tools/power/x86/intel-speed-select: Fix result display for turbo-freq auto modeSrinivas Pandruvada
The turbo-freq enable with auto mode, prints result for the last possible CPU, which is not correct when either CPU is not present or user wants command to be limited to a single die/package. For example, in the below command user wants to limit to die/package 0, but the "turbo-freq --auto" result is displayed using the other package. $ sudo intel-speed-select -c 0 turbo-freq enable -a Intel(R) Speed Select Technology package-0 die-0 cpu-0 turbo-freq enable:success package--1 die-0 cpu-31 turbo-freq --auto enable:success Since we do have to traverse all CPUs, don't display CPU info for "turbo-freq --auto", as we already displayed the result for turbo-freq enable with the CPU information. With the fix, the same command results in: $ sudo intel-speed-select -c 0 turbo-freq enable -a Intel(R) Speed Select Technology package-0 die-0 cpu-0 turbo-freq enable:success turbo-freq --auto enable:success Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-20tools/power/x86/intel-speed-select: Add support for core-power discoverySrinivas Pandruvada
It is possible that BIOS may not enable core-power feature. In this case this additional interface will allow to enable from this utility. Also the information dump, includes the current status of core-power. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-20Merge tag 'perf-core-for-mingo-5.6-20200116' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: perf report: Andi Kleen: - Clarify in help that --children is default. Jin Yao: - Fix no libunwind compiled warning breaking s390. perf annotate/report/top: Andi Kleen: - Support --prefix/--prefix-strip, use it with objdump when doing disassembly. perf c2c: Andres Freund: - Fix return type for histogram sorting comparision functions. perf header: Michael Petlan: - Use last modification time for timestamp, i.e. st.st_mtime instead of the st_ctime. perf beauty: Cengiz Can: - Fix sockaddr printf format for long integers. libperf: Jiri Olsa: - Setup initial evlist::all_cpus value perf parser: Jiri Olsa: - Use %define api.pure full instead of %pure-parser, nuking warning from bison about using deprecated stuff. perf ui gtk: - Add missing zalloc object, fixing gtk browser build. perf clang: Maciej S. Szmigiero: - Fix build issues with Clang 9 and 8+. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-01-20Merge tag 'v5.5-rc7' into perf/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-01-20Backmerge v5.5-rc7 into drm-nextDave Airlie
msm needs 5.5-rc4, go to the latest. Signed-off-by: Dave Airlie <airlied@redhat.com>
2020-01-19Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/netDavid S. Miller
2020-01-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix non-blocking connect() in x25, from Martin Schiller. 2) Fix spurious decryption errors in kTLS, from Jakub Kicinski. 3) Netfilter use-after-free in mtype_destroy(), from Cong Wang. 4) Limit size of TSO packets properly in lan78xx driver, from Eric Dumazet. 5) r8152 probe needs an endpoint sanity check, from Johan Hovold. 6) Prevent looping in tcp_bpf_unhash() during sockmap/tls free, from John Fastabend. 7) hns3 needs short frames padded on transmit, from Yunsheng Lin. 8) Fix netfilter ICMP header corruption, from Eyal Birger. 9) Fix soft lockup when low on memory in hns3, from Yonglong Liu. 10) Fix NTUPLE firmware command failures in bnxt_en, from Michael Chan. 11) Fix memory leak in act_ctinfo, from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits) cxgb4: reject overlapped queues in TC-MQPRIO offload cxgb4: fix Tx multi channel port rate limit net: sched: act_ctinfo: fix memory leak bnxt_en: Do not treat DSN (Digital Serial Number) read failure as fatal. bnxt_en: Fix ipv6 RFS filter matching logic. bnxt_en: Fix NTUPLE firmware command failures. net: systemport: Fixed queue mapping in internal ring map net: dsa: bcm_sf2: Configure IMP port for 2Gb/sec net: dsa: sja1105: Don't error out on disabled ports with no phy-mode net: phy: dp83867: Set FORCE_LINK_GOOD to default after reset net: hns: fix soft lockup when there is not enough memory net: avoid updating qdisc_xmit_lock_key in netdev_update_lockdep_key() net/sched: act_ife: initalize ife->metalist earlier netfilter: nat: fix ICMP header corruption on ICMP errors net: wan: lapbether.c: Use built-in RCU list checking netfilter: nf_tables: fix flowtable list del corruption netfilter: nf_tables: fix memory leak in nf_tables_parse_netdev_hooks() netfilter: nf_tables: remove WARN and add NLA_STRING upper limits netfilter: nft_tunnel: ERSPAN_VERSION must not be null netfilter: nft_tunnel: fix null-attribute check ...
2020-01-19selftests: devlink_trap_tunnel_vxlan: Add test case for overlay_smac_is_mcAmit Cohen
Test that the trap is triggered under the right conditions and that devlink counters increase when action is trap. Signed-off-by: Amit Cohen <amitc@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-19selftests: devlink_trap_tunnel_ipip: Add test case for decap_errorAmit Cohen
Test that the trap is triggered under the right conditions and that devlink counters increase. Signed-off-by: Amit Cohen <amitc@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-19selftests: devlink_trap_tunnel_vxlan: Add test case for decap_errorAmit Cohen
Test that the trap is triggered under the right conditions and that devlink counters increase. Signed-off-by: Amit Cohen <amitc@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-19selftests: devlink_trap_l3_drops: Add test cases of irif and erif disabledAmit Cohen
Add test cases to check that packets routed through disabled RIFs and packets routed from disabled RIFs are dropped and devlink counters increase when the action is trap. Signed-off-by: Amit Cohen <amitc@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-18Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Tooling fixes, three Intel uncore driver fixes, plus an AUX events fix uncovered by the perf fuzzer" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Remove PCIe3 unit for SNR perf/x86/intel/uncore: Fix missing marker for snr_uncore_imc_freerunning_events perf/x86/intel/uncore: Add PCI ID of IMC for Xeon E3 V5 Family perf: Correctly handle failed perf_get_aux_event() perf hists: Fix variable name's inconsistency in hists__for_each() macro perf map: Set kmap->kmaps backpointer for main kernel map chunks perf report: Fix incorrectly added dimensions as switch perf data file tools lib traceevent: Fix memory leakage in filter_event
2020-01-18selftests: add openat2(2) selftestsAleksa Sarai
Test all of the various openat2(2) flags. A small stress-test of a symlink-rename attack is included to show that the protections against ".."-based attacks are sufficient. The main things these self-tests are enforcing are: * The struct+usize ABI for openat2(2) and copy_struct_from_user() to ensure that upgrades will be handled gracefully (in addition, ensuring that misaligned structures are also handled correctly). * The -EINVAL checks for openat2(2) are all correctly handled to avoid userspace passing unknown or conflicting flag sets (most importantly, ensuring that invalid flag combinations are checked). * All of the RESOLVE_* semantics (including errno values) are correctly handled with various combinations of paths and flags. * RESOLVE_IN_ROOT correctly protects against the symlink rename(2) attack that has been responsible for several CVEs (and likely will be responsible for several more). Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-01-17cpupower: Revert library ABI changes from commit ae2917093fb60bdc1ed3eThomas Renninger
Commit ae2917093fb6 ("tools/power/cpupower: Display boost frequency separately") modified the library function: struct cpufreq_available_frequencies *cpufreq_get_available_frequencies(unsigned int cpu) to struct cpufreq_frequencies *cpufreq_get_frequencies(const char *type, unsigned int cpu) This patch recovers the old API and implements the new functionality in a newly introduce method: struct cpufreq_boost_frequencies *cpufreq_get_available_frequencies(unsigned int cpu) This one should get merged into stable kernels back to 5.0 when the above had been introduced. Fixes: ae2917093fb6 ("tools/power/cpupower: Display boost frequency separately") Cc: stable@vger.kernel.org Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-01-17libbpf: Load btf_vmlinux only once per object.KP Singh
As more programs (TRACING, STRUCT_OPS, and upcoming LSM) use vmlinux BTF information, loading the BTF vmlinux information for every program in an object is sub-optimal. The fix was originally proposed in: https://lore.kernel.org/bpf/CAEf4BzZodr3LKJuM7QwD38BiEH02Cc1UbtnGpVkCJ00Mf+V_Qg@mail.gmail.com/ The btf_vmlinux is populated in the object if any of the programs in the object requires it just before the programs are loaded and freed after the programs finish loading. Reported-by: Andrii Nakryiko <andrii.nakryiko@gmail.com> Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Brendan Jackman <jackmanb@chromium.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200117212825.11755-1-kpsingh@chromium.org
2020-01-17iocost: Fix iocost_monitor.py due to helper type mismatchTejun Heo
iocost_monitor.py broke with recent versions of drgn due to helper being stricter about types. Fix it so that it uses the correct type. Signed-off-by: Tejun Heo <tj@kernel.org> Suggested-by: Omar Sandoval <osandov@fb.com>
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