linux-stable.git/tools, branch v5.8.7

perf record/stat: Explicitly call out event modifiers in the documentation

2020-09-05T09:24:02+00:00

commit e48a73a312ebf19cc3d72aa74985db25c30757c1 upstream.

Event modifiers are not mentioned in the perf record or perf stat
manpages.  Add them to orient new users more effectively by pointing
them to the perf list manpage for details.

Fixes: 2055fdaf8703 ("perf list: Document precise event sampling for AMD IBS")
Signed-off-by: Kim Phillips 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexey Budankov 
Cc: Ian Rogers 
Cc: Jin Yao 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Paul Clarke 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Tony Jones 
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200901215853.276234-1-kim.phillips@amd.com
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Greg Kroah-Hartman

selftests/x86/test_vsyscall: Improve the process_vm_readv() test

2020-09-05T09:24:02+00:00

commit 8891adc61dce2a8a41fc0c23262b681c3ec4b73a upstream.

The existing code accepted process_vm_readv() success or failure as long
as it didn't return garbage.  This is too weak: if the vsyscall page is
readable, then process_vm_readv() should succeed and, if the page is not
readable, then it should fail.

Signed-off-by: Andy Lutomirski 
Signed-off-by: Dave Hansen 
Cc: x86@kernel.org
Cc: Peter Zijlstra 
Cc: Andy Lutomirski 
Cc: Jann Horn 
Cc: John Hubbard 
Cc: Andrew Morton 
Cc: Kirill A. Shutemov 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

bpf: selftests: global_funcs: Check err_str before strstr

2020-09-03T09:29:38+00:00

[ Upstream commit c210773d6c6f595f5922d56b7391fe343bc7310e ]

The error path in libbpf.c:load_program() has calls to pr_warn()
which ends up for global_funcs tests to
test_global_funcs.c:libbpf_debug_print().

For the tests with no struct test_def::err_str initialized with a
string, it causes call of strstr() with NULL as the second argument
and it segfaults.

Fix it by calling strstr() only for non-NULL err_str.

Signed-off-by: Yauheni Kaliuta 
Signed-off-by: Alexei Starovoitov 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/bpf/20200820115843.39454-1-yauheni.kaliuta@redhat.com
Signed-off-by: Sasha Levin

libbpf: Fix map index used in error message

2020-09-03T09:29:38+00:00

[ Upstream commit 1e891e513e16c145cc9b45b1fdb8bf4a4f2f9557 ]

The error message emitted by bpf_object__init_user_btf_maps() was using the
wrong section ID.

Signed-off-by: Toke Høiland-Jørgensen 
Signed-off-by: Daniel Borkmann 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/bpf/20200819110534.9058-1-toke@redhat.com
Signed-off-by: Sasha Levin

selftests: disable rp_filter for icmp_redirect.sh

2020-09-03T09:29:35+00:00

[ Upstream commit bcf7ddb0186d366f761f86196b480ea6dd2dc18c ]

h1 is initially configured to reach h2 via r1 rather than the
more direct path through r2. If rp_filter is set and inherited
for r2, forwarding fails since the source address of h1 is
reachable from eth0 vs the packet coming to it via r1 and eth1.
Since rp_filter setting affects the test, explicitly reset it.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller 
Signed-off-by: Sasha Levin

selftests/bpf: Correct various core_reloc 64-bit assumptions

2020-09-03T09:29:33+00:00

[ Upstream commit 5705d705832f74395c5465ce93192688f543006a ]

Ensure that types are memory layout- and field alignment-compatible regardless
of 32/64-bitness mix of libbpf and BPF architecture.

Signed-off-by: Andrii Nakryiko 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/20200813204945.1020225-8-andriin@fb.com
Signed-off-by: Sasha Levin

selftests/bpf: Fix btf_dump test cases on 32-bit arches

2020-09-03T09:29:33+00:00

[ Upstream commit eed7818adf03e874994b966aa33bc00204dd275a ]

Fix btf_dump test cases by hard-coding BPF's pointer size of 8 bytes for cases
where it's impossible to deterimne the pointer size (no long type in BTF). In
cases where it's known, validate libbpf correctly determines it as 8.

Signed-off-by: Andrii Nakryiko 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/20200813204945.1020225-6-andriin@fb.com
Signed-off-by: Sasha Levin

selftest/bpf: Fix compilation warnings in 32-bit mode

2020-09-03T09:29:33+00:00

[ Upstream commit 9028bbcc3e12510cac13a9554f1a1e39667a4387 ]

Fix compilation warnings emitted when compiling selftests for 32-bit platform
(x86 in my case).

Signed-off-by: Andrii Nakryiko 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/20200813204945.1020225-3-andriin@fb.com
Signed-off-by: Sasha Levin

tools/bpftool: Fix compilation warnings in 32-bit mode

2020-09-03T09:29:33+00:00

[ Upstream commit 09f44b753a7d120becc80213c3459183c8acd26b ]

Fix few compilation warnings in bpftool when compiling in 32-bit mode.
Abstract away u64 to pointer conversion into a helper function.

Signed-off-by: Andrii Nakryiko 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/20200813204945.1020225-2-andriin@fb.com
Signed-off-by: Sasha Levin

libbpf: Prevent overriding errno when logging errors

2020-09-03T09:29:33+00:00

[ Upstream commit 23ab656be263813acc3c20623757d3cd1496d9e1 ]

Turns out there were a few more instances where libbpf didn't save the
errno before writing an error message, causing errno to be overridden by
the printf() return and the error disappearing if logging is enabled.

Signed-off-by: Toke Høiland-Jørgensen 
Signed-off-by: Daniel Borkmann 
Acked-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20200813142905.160381-1-toke@redhat.com
Signed-off-by: Sasha Levin