linux/tools/lib/bpf, branch v6.13

libbpf: Change hash_combine parameters from long to unsigned long

2024-11-16T19:01:38Z

The hash_combine() could be trapped when compiled with sanitizer like "zig cc" or clang with signed-integer-overflow option. This patch parameters and return type to unsigned long to remove the potential overflow. Signed-off-by: Sidong Yang Acked-by: Yonghong Song Link: https://lore.kernel.org/r/20241116081054.65195-1-sidong.yang@furiosa.ai Signed-off-by: Alexei Starovoitov

libbpf: Fix memory leak in bpf_program__attach_uprobe_multi

2024-11-15T19:29:12Z

Andrii reported memory leak detected by Coverity on error path in bpf_program__attach_uprobe_multi. Fixing that by moving the check earlier before the offsets allocations. Reported-by: Andrii Nakryiko Signed-off-by: Jiri Olsa Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241115115843.694337-1-jolsa@kernel.org

libbpf: Stringify errno in log messages in the remaining code

2024-11-12T04:29:45Z

Convert numeric error codes into the string representations in log messages in the rest of libbpf source files. Signed-off-by: Mykyta Yatsenko Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241111212919.368971-5-mykyta.yatsenko5@gmail.com

libbpf: Stringify errno in log messages in btf*.c

2024-11-12T04:29:45Z

Convert numeric error codes into the string representations in log messages in btf.c and btf_dump.c. Signed-off-by: Mykyta Yatsenko Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241111212919.368971-4-mykyta.yatsenko5@gmail.com

libbpf: Stringify errno in log messages in libbpf.c

2024-11-12T04:29:45Z

Convert numeric error codes into the string representations in log messages in libbpf.c. Signed-off-by: Mykyta Yatsenko Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241111212919.368971-3-mykyta.yatsenko5@gmail.com

libbpf: Introduce errstr() for stringifying errno

2024-11-12T04:29:20Z

Add function errstr(int err) that allows converting numeric error codes into string representations. Signed-off-by: Mykyta Yatsenko Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241111212919.368971-2-mykyta.yatsenko5@gmail.com

libbpf: Add support for uprobe multi session attach

2024-11-11T16:18:06Z

Adding support to attach program in uprobe session mode with bpf_program__attach_uprobe_multi function. Adding session bool to bpf_uprobe_multi_opts struct that allows to load and attach the bpf program via uprobe session. the attachment to create uprobe multi session. Also adding new program loader section that allows: SEC("uprobe.session/bpf_fentry_test*") and loads/attaches uprobe program as uprobe session. Adding sleepable hook (uprobe.session.s) as well. Signed-off-by: Jiri Olsa Signed-off-by: Andrii Nakryiko Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241108134544.480660-6-jolsa@kernel.org

bpf: Add support for uprobe multi session attach

2024-11-11T16:18:03Z

Adding support to attach BPF program for entry and return probe of the same function. This is common use case which at the moment requires to create two uprobe multi links. Adding new BPF_TRACE_UPROBE_SESSION attach type that instructs kernel to attach single link program to both entry and exit probe. It's possible to control execution of the BPF program on return probe simply by returning zero or non zero from the entry BPF program execution to execute or not the BPF program on return probe respectively. Signed-off-by: Jiri Olsa Signed-off-by: Andrii Nakryiko Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241108134544.480660-4-jolsa@kernel.org

libbpf: start v1.6 development cycle

2024-10-29T20:42:52Z

With libbpf v1.5.0 release out, start v1.6 dev cycle. Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/r/20241029184045.581537-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov

libbpf: define __uptr.

2024-10-24T17:25:59Z

Make __uptr available to BPF programs to enable them to define uptrs. Acked-by: Andrii Nakryiko Signed-off-by: Kui-Feng Lee Signed-off-by: Martin KaFai Lau Link: https://lore.kernel.org/r/20241023234759.860539-8-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov