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From: Song Liu <songliubraving@fb.com>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>, <linux-mm@kvack.org>
Cc: <ast@kernel.org>, <daniel@iogearbox.net>, <kernel-team@fb.com>,
	<akpm@linux-foundation.org>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>
Subject: [PATCH v7 bpf-next 2/3] bpf: allow bpf_d_path in bpf_iter program
Date: Fri, 12 Feb 2021 10:31:06 -0800	[thread overview]
Message-ID: <20210212183107.50963-3-songliubraving@fb.com> (raw)
In-Reply-To: <20210212183107.50963-1-songliubraving@fb.com>

task_file and task_vma iter programs have access to file->f_path. Enable
bpf_d_path to print paths of these file.

Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
 kernel/trace/bpf_trace.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 6c0018abe68a0..4959da1a33d2e 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1191,6 +1191,10 @@ BTF_SET_END(btf_allowlist_d_path)
 
 static bool bpf_d_path_allowed(const struct bpf_prog *prog)
 {
+	if (prog->type == BPF_PROG_TYPE_TRACING &&
+	    prog->expected_attach_type == BPF_TRACE_ITER)
+		return true;
+
 	if (prog->type == BPF_PROG_TYPE_LSM)
 		return bpf_lsm_is_sleepable_hook(prog->aux->attach_btf_id);
 
-- 
2.24.1


  parent reply	other threads:[~2021-02-12 18:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-12 18:31 [PATCH v7 bpf-next 0/3] introduce bpf_iter for task_vma Song Liu
2021-02-12 18:31 ` [PATCH v7 bpf-next 1/3] bpf: introduce task_vma bpf_iter Song Liu
2021-02-12 18:31 ` Song Liu [this message]
2021-02-12 18:31 ` [PATCH v7 bpf-next 3/3] selftests/bpf: add test for bpf_iter_task_vma Song Liu
2021-02-12 21:04 ` [PATCH v7 bpf-next 0/3] introduce bpf_iter for task_vma Alexei Starovoitov

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