From: Rong Tao <rtoax@foxmail.com>
To: ast@kernel.org, daniel@iogearbox.net
Cc: rtoax@foxmail.com, rongtao@cestc.cn,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Eduard Zingerman <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@fomichev.me>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>, Mykola Lysenko <mykolal@fb.com>,
Shuah Khan <shuah@kernel.org>,
Juntong Deng <juntong.deng@outlook.com>,
Amery Hung <amery.hung@bytedance.com>,
Dave Marchevsky <davemarchevsky@fb.com>,
bpf@vger.kernel.org (open list:BPF [GENERAL] (Safe Dynamic
Programs and Tools)), linux-kernel@vger.kernel.org (open list),
linux-kselftest@vger.kernel.org (open list:KERNEL SELFTEST
FRAMEWORK)
Subject: [PATCH bpf-next 0/2] Add kfunc for doing pid -> task cwd
Date: Thu, 29 May 2025 11:26:13 +0800 [thread overview]
Message-ID: <tencent_A8B65EDD467511570D5C8400B2102E335409@qq.com> (raw)
In some application like bpftrace [1], need to get the cwd from the pid.
This patch provides a new kfunc that can get the cwd of the process from
the pid.
[1] https://github.com/bpftrace/bpftrace/issues/3314
Rong Tao (2):
bpf: Add bpf_task_cwd_from_pid() kfunc
selftests/bpf: Add selftests for bpf_task_cwd_from_pid()
kernel/bpf/helpers.c | 45 ++++++++++++++++++
.../selftests/bpf/prog_tests/task_kfunc.c | 3 ++
.../selftests/bpf/progs/task_kfunc_common.h | 1 +
.../selftests/bpf/progs/task_kfunc_success.c | 47 +++++++++++++++++++
4 files changed, 96 insertions(+)
--
2.49.0
reply other threads:[~2025-05-29 3:31 UTC|newest]
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