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Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Arseny Krasnov , Colin Ian King , Andra Paraschiv , Norbert Slusarek CC: , , , , Subject: [RFC PATCH v1 0/7] virtio/vsock: introduce MSG_EOR flag for SEQPACKET Date: Mon, 26 Jul 2021 19:31:33 +0300 Message-ID: <20210726163137.2589102-1-arseny.krasnov@kaspersky.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.64.64.121] X-ClientProxiedBy: hqmailmbx2.avp.ru (10.64.67.242) To hqmailmbx3.avp.ru (10.64.67.243) X-KSE-ServerInfo: hqmailmbx3.avp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 07/26/2021 16:13:33 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 0 X-KSE-AntiSpam-Info: Lua profiles 165254 [Jul 26 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: arseny.krasnov@kaspersky.com X-KSE-AntiSpam-Info: LuaCore: 449 449 5db59deca4a4f5e6ea34a93b13bc730e229092f4 X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2;arseniy-pc.avp.ru:7.1.1;kaspersky.com:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: Rate: 0 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 07/26/2021 16:15:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 26.07.2021 14:57:00 X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KLMS-Rule-ID: 52 X-KLMS-Message-Action: clean X-KLMS-AntiSpam-Status: not scanned, disabled by settings X-KLMS-AntiSpam-Interceptor-Info: not scanned X-KLMS-AntiPhishing: Clean, bases: 2021/07/26 14:52:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/07/26 14:01:00 #16958312 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset implements support of MSG_EOR bit for SEQPACKET AF_VSOCK sockets over virtio transport. Idea is to distinguish concepts of 'messages' and 'records'. Message is result of sending calls: 'write()', 'send()', 'sendmsg()' etc. It has fixed maximum length, and it bounds are visible using return from receive calls: 'read()', 'recv()', 'recvmsg()' etc. Current implementation based on message definition above. Record has unlimited length, it consists of multiple message, and bounds of record are visible via MSG_EOR flag returned from 'recvmsg()' call. Sender passes MSG_EOR to sending system call and receiver will see MSG_EOR when corresponding message will be processed. To support MSG_EOR new bit was added along with existing 'VIRTIO_VSOCK_SEQ_EOR': 'VIRTIO_VSOCK_SEQ_EOM'(end-of-message) - now it works in the same way as 'VIRTIO_VSOCK_SEQ_EOR'. But 'VIRTIO_VSOCK_SEQ_EOR' is used to mark 'MSG_EOR' bit passed from userspace. This patchset includes simple test for MSG_EOR. Also i've added new vsock test for '-EAGAIN' receive result. Arseny Krasnov(7): virtio/vsock: add 'VIRTIO_VSOCK_SEQ_EOM' bit vsock: rename implementation from 'record' to 'message' vhost/vsock: support MSG_EOR bit processing virito/vsock: support MSG_EOR bit processing af_vsock: rename variables in receive loop vsock_test: update message bounds test for MSG_EOR vsock_test: 'SO_RCVTIMEO' test for SEQPACKET drivers/vhost/vsock.c | 28 +++++++---- include/uapi/linux/virtio_vsock.h | 1 + net/vmw_vsock/af_vsock.c | 10 ++-- net/vmw_vsock/virtio_transport_common.c | 23 +++++---- tools/testing/vsock/vsock_test.c | 57 ++++++++++++++++++++++- 5 files changed, 96 insertions(+), 23 deletions(-) Signed-off-by: Arseny Krasnov -- 2.25.1