This adds the missing part of supporting virtiofs dax on the slave end,
that is, receiving a socket pair fd from the master end to set up a
communication channel for sending setupmapping & removemapping messages.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
This introduces setupmapping and removemapping methods to server.rs,
passthrough.rs and filesystem.rs in order to support virtiofs dax mode
inside guest.
Since we don't really want the server.rs to know that it is dealing with
vhost-user specifically, this is making it more generic by adding a new
trait which has three functions map()/unmap()/sync() corresponding to
fs_slave_{map, unmap, sync}, server.rs will take anything that implements
the trait.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
This introduces SlaveFsCacheReq which implements
VhostUserMasterReqHandler to handle map/unmap requests.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
The unit tests are run from cargo test through multiple threads of the
same process. For this reason, all these threads share their file
descriptors (because that's how this works on Linux), which means that
any of them can close a file descriptor opened from another thread.
In the context of create_listener() and accept_connection() tests, they
can run concurrently and this generates some failure when the file
descriptor create_listener() is binding to is being closed from the
accept_connection() test.
In order to avoid such race condition, this patch simply removes the
part of the unit test performing an explicit and unsafe file descriptor
closure.
Fixes#759
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If no socket is supplied when enabling "vhost_user=true" on "--disk"
follow the "exe" path in the /proc entry for this process and launch the
network backend (via the vmm_path field.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The unit tests require some specific Linux capabilities and also to have
access to /dev/kvm device. This commit makes sure we enable only what's
necessary instead of blindly enable full priviliges with --privileged
option.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We need the host IPC for sharing eventfds with KVM, and the host network
for VFIO.
We also enforce the no-seccomp setting on the container, to overcome any
potential filtering set by our container's Ubuntu base.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
When a virtio-fs device is created with a dedicated shared region, by
default the region should be mapped as PROT_NONE so that no pages can be
faulted in.
It's only when the guest performs the mount of the virtiofs filesystem
that we can expect the VMM, on behalf of the backend, to perform some
new mappings in the reserved shared window, using PROT_READ and/or
PROT_WRITE.
Fixes#763
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If no socket is supplied when enabling "vhost_user=true" on "--net"
follow the "exe" path in the /proc entry for this process and launch the
network backend (via the vmm_path field.)
Currently this only supports creating a new tap interface as the network
backend also only supports that.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the connection to the backend fails, sleep and retry up to a count.
This failure could happen because the backend is not yet ready to handle
the connection which is a common case when working with a spawned
backend.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It is necessary to do this at the start of the VMM execution rather than
later as it must be done in the main thread in order to satisfy the
checks required by PTRACE_MODE_READ_FSCREDS (see proc(5) and
ptrace(2))
The alternative is to run as CAP_SYS_PTRACE but that has its
disadvantages.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the VMM to explicitly shutdown devices as part of the VM
shutdown ahead of what Drop::drop() would do.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a build-script to propagate the git commit hash to other crates at
compile time through environment variables, and display the hash along
with the '--version' option.
Fixes#729
Signed-off-by: Bo Chen <chen.bo@intel.com>
The placement of the explicit run of "test_vfio" meant it was run with
MMIO rather than PCI which meant it always failed.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Just updating the documentation regarding the pre-creation of a tap
interface supporting multiqueue, by adding what the cloud-hypervisor
--net parameter should look like.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By detecting if an existing tap interface supports multiqueue, we now
have the information to determine if the command line parameters
regarding the number of queues is correct.
Fixes#738
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to identify better the problem whenever an existing TAP is
provided, this patch enhances the error returned for an easier
diagnosis of the problem.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
test_vfio has been failing consistently on the CI so mark it with
a "#[ignore]" and then forceably build it again but ignore the build
result.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Implement the exit_event() method on the VhostUserBackend trait. It is
necessary to specify a custom exit event id in this case as the loop is
also used for handling activity on the tap file descriptors.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Implement the newly added exit_event() method on the VhostUserBackend
trait to allow the backend to provide an EventFD for triggering an exit
of the worker thread.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Rather than handling the KILL_EVENT in the event handler itself use the
newly added support in VhostUserBackend for providing a kill event
framework.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
All backends currently provide their own implementation for triggering
the worker thread to exit via an EventFd. Modify the VhostUserBackend
trait to allow a common implementation strategy that backends can use to
provide an EventFd (and optional id) that can be used to trigger the
worker to exit.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
