linux-kernel - [PATCH 21/23] io_uring: wire bpf copy to user

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Message-Id: <12ed7a929cca94a82023076ae99e90f7663f297f.1621424513.git.asml.silence@gmail.com>
Date:   Wed, 19 May 2021 15:13:32 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     io-uring@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Horst Schirmeier <horst.schirmeier@...dortmund.de>,
        "Franz-B . Tuneke" <franz-bernhard.tuneke@...dortmund.de>,
        Christian Dietrich <stettberger@...ucode.de>
Subject: [PATCH 21/23] io_uring: wire bpf copy to user

Enable io_uring to write to userspace memory

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index c37846bca863..c4682146afa4 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -10467,6 +10467,8 @@ io_bpf_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 	switch (func_id) {
 	case BPF_FUNC_copy_from_user:
 		return prog->aux->sleepable ? &bpf_copy_from_user_proto : NULL;
+	case BPF_FUNC_copy_to_user:
+		return prog->aux->sleepable ? &bpf_copy_to_user_proto : NULL;
 	case BPF_FUNC_iouring_queue_sqe:
 		return prog->aux->sleepable ? &io_bpf_queue_sqe_proto : NULL;
 	case BPF_FUNC_iouring_emit_cqe:
-- 
2.31.1