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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , Bobby Eshleman CC: , , , , , , Subject: [PATCH net-next v1 08/12] vsock: enable setting SO_ZEROCOPY Date: Fri, 22 Sep 2023 08:24:24 +0300 Message-ID: <20230922052428.4005676-9-avkrasnov@salutedevices.com> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20230922052428.4005676-1-avkrasnov@salutedevices.com> References: <20230922052428.4005676-1-avkrasnov@salutedevices.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 180033 [Sep 21 2023] X-KSMG-AntiSpam-Version: 5.9.59.0 X-KSMG-AntiSpam-Envelope-From: avkrasnov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 534 534 808c2ea49f7195c68d40844e073217da4fa0d1e3, {Tracking_from_domain_doesnt_match_to}, 100.64.160.123:7.1.2;127.0.0.199:7.1.2;salutedevices.com:7.1.1;p-i-exch-sc-m01.sberdevices.ru:5.0.1,7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1, FromAlignment: s, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/09/22 02:22:00 #21944311 X-KSMG-AntiVirus-Status: Clean, skipped X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org For AF_VSOCK, zerocopy tx mode depends on transport, so this option must be set in AF_VSOCK implementation where transport is accessible (if transport is not set during setting SO_ZEROCOPY: for example socket is not connected, then SO_ZEROCOPY will be enabled, but once transport will be assigned, support of this type of transmission will be checked). To handle SO_ZEROCOPY, AF_VSOCK implementation uses SOCK_CUSTOM_SOCKOPT bit, thus handling SOL_SOCKET option operations, but all of them except SO_ZEROCOPY will be forwarded to the generic handler by calling 'sock_setsockopt()'. Signed-off-by: Arseniy Krasnov --- Changelog: v5(big patchset) -> v1: * Compact 'if' conditions. * Rename 'zc_val' to 'zerocopy'. * Use 'zerocopy' value directly in 'sock_valbool_flag()', without ?: operator. * Set 'SOCK_CUSTOM_SOCKOPT' bit for connectible sockets only, as suggested by Bobby Eshleman . net/vmw_vsock/af_vsock.c | 46 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 482300eb88e0..c05a42e02a17 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1406,8 +1406,16 @@ static int vsock_connect(struct socket *sock, struct sockaddr *addr, goto out; } - if (vsock_msgzerocopy_allow(transport)) + if (vsock_msgzerocopy_allow(transport)) { set_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags); + } else if (sock_flag(sk, SOCK_ZEROCOPY)) { + /* If this option was set before 'connect()', + * when transport was unknown, check that this + * feature is supported here. + */ + err = -EOPNOTSUPP; + goto out; + } err = vsock_auto_bind(vsk); if (err) @@ -1643,7 +1651,7 @@ static int vsock_connectible_setsockopt(struct socket *sock, const struct vsock_transport *transport; u64 val; - if (level != AF_VSOCK) + if (level != AF_VSOCK && level != SOL_SOCKET) return -ENOPROTOOPT; #define COPY_IN(_v) \ @@ -1666,6 +1674,34 @@ static int vsock_connectible_setsockopt(struct socket *sock, transport = vsk->transport; + if (level == SOL_SOCKET) { + int zerocopy; + + if (optname != SO_ZEROCOPY) { + release_sock(sk); + return sock_setsockopt(sock, level, optname, optval, optlen); + } + + /* Use 'int' type here, because variable to + * set this option usually has this type. + */ + COPY_IN(zerocopy); + + if (zerocopy < 0 || zerocopy > 1) { + err = -EINVAL; + goto exit; + } + + if (transport && !vsock_msgzerocopy_allow(transport)) { + err = -EOPNOTSUPP; + goto exit; + } + + sock_valbool_flag(sk, SOCK_ZEROCOPY, + zerocopy); + goto exit; + } + switch (optname) { case SO_VM_SOCKETS_BUFFER_SIZE: COPY_IN(val); @@ -2322,6 +2358,12 @@ static int vsock_create(struct net *net, struct socket *sock, } } + /* SOCK_DGRAM doesn't have 'setsockopt' callback set in its + * proto_ops, so there is no handler for custom logic. + */ + if (sock_type_connectible(sock->type)) + set_bit(SOCK_CUSTOM_SOCKOPT, &sk->sk_socket->flags); + vsock_insert_unbound(vsk); return 0;