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Mon, 19 May 2025 00:07:08 -0700 (PDT) From: Xuewei Niu X-Google-Original-From: Xuewei Niu To: sgarzare@redhat.com, mst@redhat.com, fupan.lfp@antgroup.com, pabeni@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, davem@davemloft.net, stefanha@redhat.com Cc: virtualization@lists.linux.dev, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xuewei Niu Subject: [PATCH 1/3] vsock: Add support for SIOCINQ ioctl Date: Mon, 19 May 2025 15:06:47 +0800 Message-Id: <20250519070649.3063874-2-niuxuewei.nxw@antgroup.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250519070649.3063874-1-niuxuewei.nxw@antgroup.com> References: <20250519070649.3063874-1-niuxuewei.nxw@antgroup.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This patch adds support for SIOCINQ ioctl, which returns the number of bytes unread in the socket. Signed-off-by: Xuewei Niu --- include/net/af_vsock.h | 2 ++ net/vmw_vsock/af_vsock.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index 9e85424c8343..6f32a2601a49 100644 --- a/include/net/af_vsock.h +++ b/include/net/af_vsock.h @@ -171,6 +171,8 @@ struct vsock_transport { =20 /* SIOCOUTQ ioctl */ ssize_t (*unsent_bytes)(struct vsock_sock *vsk); + /* SIOCINQ ioctl */ + ssize_t (*unread_bytes)(struct vsock_sock *vsk); =20 /* Shutdown. */ int (*shutdown)(struct vsock_sock *, int); diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index fc6afbc8d680..288bbfd43bc5 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1356,6 +1356,28 @@ static int vsock_do_ioctl(struct socket *sock, unsig= ned int cmd, vsk =3D vsock_sk(sk); =20 switch (cmd) { + case SIOCINQ: { + ssize_t n_bytes; + + if (!vsk->transport || !vsk->transport->unread_bytes) { + ret =3D -EOPNOTSUPP; + break; + } + + if (sock_type_connectible(sk->sk_type) && + sk->sk_state =3D=3D TCP_LISTEN) { + ret =3D -EINVAL; + break; + } + + n_bytes =3D vsk->transport->unread_bytes(vsk); + if (n_bytes < 0) { + ret =3D n_bytes; + break; + } + ret =3D put_user(n_bytes, arg); + break; + } case SIOCOUTQ: { ssize_t n_bytes; =20 --=20 2.34.1