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The set_nonblocking() implementation of the VFIO Listener was marked as unimplemented and caused a crash. However, given that accept() on a VFIO listener never blocks, it is just as safe to mark the operation as successful, since the behavior of accept() won't be impacted and it will behave properly both in blocking and non-blocking modes. Removing this panic will allow us to safely use the Listener's interface set_nonblocking() method in generic code. BUG=b:229554679 TEST=vhost-user console device works. TEST=vvu console device works. Change-Id: Ibbde7bcd048505fc3a84eb4881a74285bae6bf54 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3591111 Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Commit-Queue: Alexandre Courbot <acourbot@chromium.org> |
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vHost
A pure rust library for vhost-user. This is a fork of rust-vmm/vhost.
The vhost-user protocol aims to implement vhost backend drivers in userspace, which complements the ioctl interface used to control the vhost implementation in the Linux kernel. It implements the control plane needed to establish virtqueue sharing with a user space process on the same host. It uses communication over a Unix domain socket to share file descriptors in the ancillary data of the message.
The protocol defines two sides of the communication, master and slave. Master is the application that shares its virtqueues, slave is the consumer of the virtqueues. Master and slave can be either a client (i.e. connecting) or server (listening) in the socket communication.