kernel.git/tools/bpf/bpftool/map_perf_ring.c, branch master

bpftool: Use appropriate permissions for map access

2025-06-20T18:13:03Z

Modify several functions in tools/bpf/bpftool/common.c to allow specification of requested access for file descriptors, such as read-only access. Update bpftool to request only read access for maps when write access is not required. This fixes errors when reading from maps that are protected from modification via security_bpf_map. Signed-off-by: Slava Imameev Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/r/20250620151812.13952-1-slava.imameev@crowdstrike.com Signed-off-by: Alexei Starovoitov

bpftool: Using the right format specifiers

2025-03-17T20:50:56Z

Fixed some formatting specifiers errors, such as using %d for int and %u for unsigned int, as well as other byte-length types. Perform type cast using the type derived from the data type itself, for example, if it's originally an int, it will be cast to unsigned int if forced to unsigned. Signed-off-by: Jiayuan Chen Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20250311112809.81901-3-jiayuan.chen@linux.dev

bpftool: Fix error message of strerror

2022-09-30T22:40:46Z

strerror() expects a positive errno, however variable err will never be positive when an error occurs. This causes bpftool to output too many "unknown error", even a simple "file not exist" error can not get an accurate message. This patch fixed all "strerror(err)" patterns in bpftool. Specially in btf.c#L823, hashmap__append() is an internal function of libbpf and will not change errno, so there's a little difference. Some libbpf_get_error() calls are kept for return values. Changes since v1: https://lore.kernel.org/bpf/SY4P282MB1084B61CD8671DFA395AA8579D539@SY4P282MB1084.AUSP282.PROD.OUTLOOK.COM/ Check directly for NULL values instead of calling libbpf_get_error(). Signed-off-by: Tianyi Liu Signed-off-by: Andrii Nakryiko Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/bpf/SY4P282MB1084AD9CD84A920F08DF83E29D549@SY4P282MB1084.AUSP282.PROD.OUTLOOK.COM

bpftool: Remove unused struct event_ring_info

2022-09-30T21:09:05Z

After commit 9b190f185d2f ("tools/bpftool: switch map event_pipe to libbpf's perf_buffer"), struct event_ring_info is not used any more and can be removed as well. Signed-off-by: Yuan Can Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220928090440.79637-3-yuancan@huawei.com

bpftool: Update btf_dump__new() and perf_buffer__new_raw() calls

2021-11-12T00:54:06Z

Use v1.0-compatible variants of btf_dump and perf_buffer "constructors". This is also a demonstration of reusing struct perf_buffer_raw_opts as OPTS-style option struct for new perf_buffer__new_raw() API. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211111053624.190580-10-andrii@kernel.org

bpftool: Remove useless #include to from map_perf_ring.c

2021-10-20T17:47:39Z

The header is no longer needed since the event_pipe implementation was updated to rely on libbpf's perf_buffer. This makes bpftool free of dependencies to perf files, and we can update the Makefile accordingly. Fixes: 9b190f185d2f ("tools/bpftool: switch map event_pipe to libbpf's perf_buffer") Signed-off-by: Quentin Monnet Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211020094826.16046-1-quentin@isovalent.com

tools, bpftool: Poison and replace kernel integer typedefs

2020-05-11T19:20:46Z

Replace the use of kernel-only integer typedefs (u8, u32, etc.) by their user space counterpart (__u8, __u32, etc.). Similarly to what libbpf does, poison the typedefs to avoid introducing them again in the future. Signed-off-by: Quentin Monnet Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20200511161536.29853-2-quentin@isovalent.com

bpftool: Use consistent include paths for libbpf

2020-01-21T00:37:45Z

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 Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/157952560684.1683545.4765181397974997027.stgit@toke.dk

tools: bpftool: fix arguments for p_err() in do_event_pipe()

2019-08-16T05:06:46Z

The last argument passed to some calls to the p_err() functions is not correct, it should be "*argv" instead of "**argv". This may lead to a segmentation fault error if CPU IDs or indices from the command line cannot be parsed correctly. Let's fix this. Fixes: f412eed9dfde ("tools: bpftool: add simple perf event output reader") Signed-off-by: Quentin Monnet Reviewed-by: Jakub Kicinski Signed-off-by: Alexei Starovoitov

tools/bpftool: switch map event_pipe to libbpf's perf_buffer

2019-07-08T13:35:43Z

Switch event_pipe implementation to rely on new libbpf perf buffer API (it's raw low-level variant). Signed-off-by: Andrii Nakryiko Acked-by: Jakub Kicinski Acked-by: Yonghong Song Signed-off-by: Daniel Borkmann