kernel/linux.git/include/net/af_vsock.h, branch v6.6.31

virtio/vsock: send credit update during setting SO_RCVLOWAT

2024-01-25T23:35:26+00:00

[ Upstream commit 0fe1798968115488c0c02f4633032a015b1faf97 ] Send credit update message when SO_RCVLOWAT is updated and it is bigger than number of bytes in rx queue. It is needed, because 'poll()' will wait until number of bytes in rx queue will be not smaller than O_RCVLOWAT, so kick sender to send more data. Otherwise mutual hungup for tx/rx is possible: sender waits for free space and receiver is waiting data in 'poll()'. Rename 'set_rcvlowat' callback to 'notify_set_rcvlowat' and set 'sk->sk_rcvlowat' only in one place (i.e. 'vsock_set_rcvlowat'), so the transport doesn't need to do it. Fixes: b89d882dc9fc ("vsock/virtio: reduce credit update messages") Signed-off-by: Arseniy Krasnov Reviewed-by: Stefano Garzarella Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

af_vsock: Remove unused declaration vsock_release_pending()/vsock_init_tap()

2023-08-04T22:34:03+00:00

Commit d021c344051a ("VSOCK: Introduce VM Sockets") declared but never implemented vsock_release_pending(). Also vsock_init_tap() never implemented since introduction in commit 531b374834c8 ("VSOCK: Add vsockmon tap functions"). Signed-off-by: Yue Haibing Reviewed-by: Simon Horman Reviewed-by: Stefano Garzarella Link: https://lore.kernel.org/r/20230803134507.22660-1-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski

vsock: support sockmap

2023-03-29T07:19:38+00:00

This patch adds sockmap support for vsock sockets. It is intended to be usable by all transports, but only the virtio and loopback transports are implemented. SOCK_STREAM, SOCK_DGRAM, and SOCK_SEQPACKET are all supported. Signed-off-by: Bobby Eshleman Acked-by: Michael S. Tsirkin Reviewed-by: Stefano Garzarella Signed-off-by: David S. Miller

vsock: add API call for data ready

2022-08-23T08:43:11+00:00

This adds 'vsock_data_ready()' which must be called by transport to kick sleeping data readers. It checks for SO_RCVLOWAT value before waking user, thus preventing spurious wake ups. Based on 'tcp_data_ready()' logic. Signed-off-by: Arseniy Krasnov Reviewed-by: Stefano Garzarella Signed-off-by: Paolo Abeni

vsock: SO_RCVLOWAT transport set callback

2022-08-23T08:43:11+00:00

This adds transport specific callback for SO_RCVLOWAT, because in some transports it may be difficult to know current available number of bytes ready to read. Thus, when SO_RCVLOWAT is set, transport may reject it. Signed-off-by: Arseniy Krasnov Signed-off-by: Paolo Abeni

net: add missing includes and forward declarations under net/

2022-07-22T11:53:22+00:00

This patch adds missing includes to headers under include/net. All these problems are currently masked by the existing users including the missing dependency before the broken header. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller

vsock: each transport cycles only on its own sockets

2022-03-12T07:14:19+00:00

When iterating over sockets using vsock_for_each_connected_socket, make sure that a transport filters out sockets that don't belong to the transport. There actually was an issue caused by this; in a nested VM configuration, destroying the nested VM (which often involves the closing of /dev/vhost-vsock if there was h2g connections to the nested VM) kills not only the h2g connections, but also all existing g2h connections to the (outmost) host which are totally unrelated. Tested: Executed the following steps on Cuttlefish (Android running on a VM) [1]: (1) Enter into an `adb shell` session - to have a g2h connection inside the VM, (2) open and then close /dev/vhost-vsock by `exec 3< /dev/vhost-vsock && exec 3<&-`, (3) observe that the adb session is not reset. [1] https://android.googlesource.com/device/google/cuttlefish/ Fixes: c0cfa2d8a788 ("vsock: add multi-transports support") Reviewed-by: Stefano Garzarella Acked-by: Michael S. Tsirkin Signed-off-by: Jiyong Park Link: https://lore.kernel.org/r/20220311020017.1509316-1-jiyong@google.com Signed-off-by: Jakub Kicinski

af_vsock: rest of SEQPACKET support

2021-06-11T20:32:46+00:00

Add socket ops for SEQPACKET type and .seqpacket_allow() callback to query transports if they support SEQPACKET. Also split path for data check for STREAM and SEQPACKET branches. Signed-off-by: Arseny Krasnov Signed-off-by: David S. Miller

af_vsock: implement send logic for SEQPACKET

2021-06-11T20:32:46+00:00

Update current stream enqueue function for SEQPACKET support: 1) Call transport's seqpacket enqueue callback. 2) Return value from enqueue function is whole record length or error for SOCK_SEQPACKET. Signed-off-by: Arseny Krasnov Reviewed-by: Stefano Garzarella Signed-off-by: David S. Miller

af_vsock: implement SEQPACKET receive loop

2021-06-11T20:32:46+00:00

Add receive loop for SEQPACKET. It looks like receive loop for STREAM, but there are differences: 1) It doesn't call notify callbacks. 2) It doesn't care about 'SO_SNDLOWAT' and 'SO_RCVLOWAT' values, because there is no sense for these values in SEQPACKET case. 3) It waits until whole record is received. 4) It processes and sets 'MSG_TRUNC' flag. So to avoid extra conditions for two types of socket inside one loop, two independent functions were created. Signed-off-by: Arseny Krasnov Signed-off-by: David S. Miller