The help of arguments `memory` and `memory-zone` missing a comma.
Before adding, these parts are as follows:
> hugepage_size=<hugepage_size>hotplug_method=acpi|virtio-mem
After adding, these parts will be:
> hugepage_size=<hugepage_size>,hotplug_method=acpi|virtio-mem
Signed-off-by: Yukiteru Lee <wfly1998@sina.com>
Issue from beta verion of clippy:
Error: --> vm-virtio/src/queue.rs:700:59
|
700 | if let Some(used_event) = self.get_used_event(&mem) {
| ^^^^ help: change this to: `mem`
|
= note: `-D clippy::needless-borrow` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
Signed-off-by: Bo Chen <chen.bo@intel.com>
Now all crates use edition = "2018" then the majority of the "extern
crate" statements can be removed. Only those for importing macros need
to remain.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
To avoid race issues where the api-socket may not be created by the
time a cloud-hypervisor caller is ready to look for it, enable the
caller to pass the api-socket fd directly.
Avoid breaking current callers by allowing the --api-socket path to be
passed as it is now in addition to through the path argument.
Signed-off-by: William Douglas <william.r.douglas@gmail.com>
This allows the return of errors which will be printed using the
existing code and removes panic()s
Fixes: #2342
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the return of errors which will be printed using the
existing code and removes panic()s
Fixes: #2342
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: name `StartVMMThread` contains a capitalized acronym
--> src/main.rs:50:5
|
50 | StartVMMThread(#[source] vmm::Error),
| ^^^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `StartVmmThread`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: name `InvalidCPUCount` contains a capitalized acronym
--> src/bin/ch-remote.rs:24:5
|
24 | InvalidCPUCount(std::num::ParseIntError),
| ^^^^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `InvalidCpuCount`
|
= note: `#[warn(clippy::upper_case_acronyms)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the startup message containing incomplete VM configuration
details. It's a bit unusual for a tool such as Cloud Hypervisor to print
those kind of details which are a direct representation of the command
line.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Only if we have a valid API server path then create the API server. For
now this has no functional change there is a default API server path in
the clap handling but rather prepares to do so optionally.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Replace "--monitor-fd" with "--event-monitor" which can either take
"fd=<int>" or "path=<path>" which can point to e.g. a named pipe and
allow more flexibility.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add the ability for cloud-hypervisor to create, manage and monitor a
pty for serial and/or console I/O from a user. The reasoning for
having cloud-hypervisor create the ptys is so that clients, libvirt
for example, could exit and later re-open the pty without causing I/O
issues. If the clients were responsible for creating the pty, when
they exit the main pty fd would close and cause cloud-hypervisor to
get I/O errors on writes.
Ideally the main and subordinate pty fds would be kept in the main
vmm's Vm structure. However, because the device manager owns parsing
the configuration for the serial and console devices, the information
is instead stored in new fields under the DeviceManager structure
directly.
From there hooking up the main fd is intended to look as close to
handling stdin and stdout on the tty as possible (there is some future
work ahead for perhaps moving support for the pty into the
vmm_sys_utils crate).
The main fd is used for reading user input and writing to output of
the Vm device. The subordinate fd is used to setup raw mode and it is
kept open in order to avoid I/O errors when clients open and close the
pty device.
The ability to handle multiple inputs as part of this change is
intentional. The current code allows serial and console ptys to be
created and both be used as input. There was an implementation gap
though with the queue_input_bytes needing to be modified so the pty
handlers for serial and console could access the methods on the serial
and console structures directly. Without this change only a single
input source could be processed as the console would switch based on
its input type (this is still valid for tty and isn't otherwise
modified).
Signed-off-by: William Douglas <william.r.douglas@gmail.com>
This allows the user to use an alternative huge page size otherwise the
default size will be used.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If we receive SIGSYS and identify it as a seccomp violation then give
friendly instructions on how to debug further. We are unable to decode
the siginfo_t struct ourselves due to https://github.com/rust-lang/libc/issues/716Fixes: #2139
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use a Result<> type with an error to simplify the code in start_vmm().
This will also make it easier to add cleanup funtionality.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split out the HTTP request handling code from ch-remote into a new
crate which can be used in other places where talking to the API server
by HTTP is necessary.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use the trait for Read/Write rather than specifying the concrete type.
This allows for the functionality to be used for different socket types.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The standalone `--balloon` parameter being fully functional at this
point, we can get rid of the balloon options from the --memory
parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that we have a new dedicated way of asking for a balloon through the
CLI and the REST API, we can move all the balloon code to the device
manager. This allows us to simplify the memory manager, which is already
quite complex.
It also simplifies the behavior of the balloon resizing command. Instead
of providing the expected size for the RAM, which is complex when memory
zones are involved, it now expects the balloon size. This is a much more
straightforward behavior as it really resizes the balloon to the desired
size. Additionally to the simplication, the benefit of this approach is
that it does not need to be tied to the memory manager at all.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This introduces a new way of defining the virtio-balloon device. Instead
of going through the --memory parameter, the idea is to consider balloon
as a standalone virtio device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The watchdog device is created through the "--watchdog" parameter. At
most a single watchdog can be created per VM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to let the user choose maximum address space size, this patch
introduces a new option `max_phys_bits` to the `--cpus` parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This is a new clippy check introduced in 1.47 which requires the use of
the matches!() macro for simple match blocks that return a boolean.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The ::new() does very little beyond trying to open the /dev/kvm device
so provide a hint to the user about what has gone wrong.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add the new option 'hotplugged_size' to both --memory-zone and --memory
parameters so that we can let the user specify a certain amount of
memory being plugged at boot.
This is also part of making sure we can store the virtio-mem size over a
reboot of the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Implement a new VM action called 'resize-zone' allowing the user to
resize one specific memory zone at a time. This relies on all the
preliminary work from the previous commits to resize each virtio-mem
device independently from each others.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for resizing support of an individual memory zone,
this commit introduces a new option 'hotplug_size' to '--memory-zone'
parameter. This defines the amount of memory that can be added through
each specific memory zone.
Because memory zone resize is tied to virtio-mem, make sure the user
selects 'virtio-mem' hotplug method, otherwise return an error.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The way to describe guest NUMA nodes has been updated through previous
commits, letting the user describe the full NUMA topology through the
--numa parameter (or NumaConfig).
That's why we can remove the deprecated and unused 'guest_numa_node'
option.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for allowing memory zones to be removed, but also in
anticipation for refactoring NUMA parameter, we introduce a mandatory
'id' option to the --memory-zone parameter.
This forces the user to provide a unique identifier for each memory zone
so that we can refer to these.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Through this new parameter, we give users the opportunity to specify a
set of CPUs attached to a NUMA node that has been previously created
from the --memory-zone parameter.
This parameter will be extended in the future to describe the distance
between multiple nodes.
For instance, if a user wants to attach CPUs 0, 1, 2 and 6 to a NUMA
node, here are two different ways of doing so:
Either
./cloud-hypervisor ... --numa id=0,cpus=0-2:6
Or
./cloud-hypervisor ... --numa id=0,cpus=0:1:2:6
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the introduction of this new option, the user will be able to
describe if a particular memory zone should belong to a specific NUMA
node from a guest perspective.
For instance, using '--memory-zone size=1G,guest_numa_node=2' would let
the user describe that a memory zone of 1G in the guest should be
exposed as being associated with the NUMA node 2.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since memory zones have been introduced, it is now possible for a user
to specify multiple backends for the guest RAM. By adding a new option
'host_numa_node' to the 'memory-zone' parameter, we allow the guest RAM
to be backed by memory that might come from a specific NUMA node on the
host.
The option expects a node identifier, specifying which NUMA node should
be used to allocate the memory associated with a specific memory zone.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The flag 'mergeable' should only apply to the entire guest RAM, which is
why it is removed from the MemoryZoneConfig as it is defined as a global
parameter at the MemoryConfig level.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After the introduction of user defined memory zones, we can now remove
the deprecated 'file' option from --memory parameter. This makes this
parameter simpler, letting more advanced users define their own custom
memory zones through the dedicated parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Introducing a new CLI option --memory-zone letting the user specify
custom memory zones. When this option is present, the --memory size
must be explicitly set to 0.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch extends the CLI option '--seccomp' to accept the 'log'
parameter in addition 'true/false'. It also refactors the
vmm::seccomp_filters module to support both "SeccompAction::Trap" and
"SeccompAction::Log".
Fixes: #1180
Signed-off-by: Bo Chen <chen.bo@intel.com>
This patch replaces the usage of 'SeccompLevel' with 'SeccompAction',
which is the first step to support the 'log' action over system
calls that are not on the allowed list of seccomp filters.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Introducing the new CLI option --sgx-epc along with the OpenAPI
structure SgxEpcConfig, so that a user can now enable one or multiple
SGX Enclave Page Cache sections within a contiguous region from the
guest address space.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit store balloon size to MemoryConfig.
After reboot, virtio-balloon can use this size to inflate back to
the size before reboot.
Signed-off-by: Hui Zhu <teawater@antfin.com>
The binary is still built in the same location but the source code and
the dependencies for it come from the vhost_user_block crate itself.
The binary will be built with:
`cargo build --all --bin vhost_user_block` or just `cargo build --all`
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The binary is still built in the same location but the source code and
the dependencies for it come from the vhost_user_net crate itself.
The binary will be built with:
`cargo build --all --bin vhost_user_net` or just `cargo build --all`
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The binary is still built in the same location but the source code and
the dependencies for it come from the vhost_user_fs crate itself.
The binary will be built with:
`cargo build --all --bin vhost_user_fs` or just `cargo build --all`
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split the generic virtio code (queues and device type) from the
VirtioDevice trait, transport and device implementations.
This also simplifies the feature handling in vhost_user_backend as the
vm-virtio crate is no longer has any features.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Start moving the vmm, arch and pci crates to being hypervisor agnostic
by using the hypervisor trait and abstractions. This is not a complete
switch and there are still some remaining KVM dependencies.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This needed to be updated to include specifying the boot and maxmium
vCPUs as well as the newly added topology for those vCPUs.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the user to optionally specify the desired CPU topology. All
parts of the topology must be specified and the product of all parts
must match the maximum vCPUs.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Currently, not every feature of the cloud-hypervisor is enabled
on AArch64, which means that on AArch64 machines, the
`run_unit_tests.sh` needs to be tailored and some unit test cases
should be run on x86_64 only.
Also this commit fixes the typo and unifies `Arm64` and `AArch64`
in the AArch64 document.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
If the server returns an error then print out the response body if there
is one present.
Fixes: #1262
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This config option provided very little value and instead we now enable
this feature (which then lets the guest control the cache mode)
unconditionally.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the method that is used to decide whether the guest should be
signalled into the Queue implementation from vm-virtio. This removes
duplicated code between vhost_user_backend and the vm-virtio block
implementation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a new "host_mac" parameter to "--net" and "--net-backend" and use
this to set the MAC address on the tap interface. If no address is given
one is randomly assigned and is stored in the config.
Support for vhost-user-net self spawning was also included.
Fixes: #1177
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Implement seccomp; we use one filter for all threads.
The syscall list comes from the C daemon with syscalls added
as I hit them.
The default behaviour is to kill the process, this normally gets
audit logged.
--seccomp none disables seccomp
log Just logs violations but doesn't stop it
trap causes a signal to be be sent that can be trapped.
If you suspect you're hitting a seccomp action then you can
check the audit log; you could also switch to running with 'log'
to collect a bunch of calls to report.
To see where the syscalls are coming from use 'trap' with a debugger
or coredump to backtrace it.
This can be improved for some syscalls to restrict the parameters
to some syscalls to make them more restrictive.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Implement support for setting up a sandbox for running the
service. The technique for this has been borrowed from virtiofsd, and
consists on switching to new PID, mount and network namespaces, and
then switching root to the directory to be shared.
Future patches will implement additional hardening features like
dropping capabilities and seccomp filters.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Changes is vhost crate require VhostUserDaemon users to create and
provide a vhost::Listener in advance. This allows us to adopt
sandboxing strategies in the future, by being able to create the UNIX
socket before switching to a restricted namespace.
Update also the reference to vhost crate in Cargo.lock to point to the
latest commit from the dragonball branch.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Rather than repeat syntax for the vhost-user-block backend in multiple
places store it in one place and reference it from the required places.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Rather than repeat syntax for the vhost-user-net backend in multiple
places store it in one place and reference it from the required places.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The ch-remote usage says:
OPTIONS:
--api-socket <api-socket> HTTP API socket path (UNIX domain socket).
However it doesn't seem to actually accept that syntax, instead
requiring "--api-socket=". This may be a clap bug however it is resolved
by setting the number of arguments requires to exactly one. Which is
also the actual correct number.
Fixes: #1117Fixes: #1116
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It's possible to have multiple vsock devices so in preparation for
hotplug/unplug it is important to be able to have a unique identifier
for each device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Check that if any device using vhost-user (net & disk with
vhost_user=true) or virtio-fs is enabled then check shared memory is
also enabled.
Fixes: #848
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The new 'shared' and 'hugepages' controls aim to replace the 'file'
option in MemoryConfig. This patch also updated all related integration
tests to use the new controls (instead of providing explicit paths to
"/dev/shm" or "/dev/hugepages").
Fixes: #1011
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Signed-off-by: Bo Chen <chen.bo@intel.com>
Currently unimplemented. Once implemented, this API will allow for
creating virtio-fs devices in the VM after it has booted.
Signed-off-by: Dean Sheather <dean@coder.com>
By adding a "thread_id" parameter to handle_event(), the backend crate
can now indicate to the backend implementation which thread triggered
the processing of some events.
This is applied to vhost-user-net backend and allows for simplifying a
lot the code since each thread is identical.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By adding the "thread_index" parameter to the function exit_event() from
the VhostUserBackend trait, the backend crate now has the ability to ask
the backend implementation about the exit event related to a specific
thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By changing the mutability of this function, after adapting all
backends, we should be able to implement multithreads with
multiqueues support without hitting a bottleneck on the backend
locking.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Both blk, net and fs backends have been updated to avoid the requirement
of having handle_event(&mut self). This will allow the backend crate to
avoid taking a write lock onto the backend object, which will remove the
potential contention point when multiple threads will be handling
multiqueues.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As the VmConfig::Parse() also does validation work it only make sense to
parse the VM options on the VM boot path only.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Replace the existing VmConfig::valid() check with a call into
.validate() as part of earlier config setup or boot API checks.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The goal here is to move the restore parameters into a dedicated
structure that can be reused from the entire codebase, making the
addition or removal of a parameter easier.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
currently unused, the initramfs argument is added to the cli,
and stored in vmm::config:VmConfig as an Option(InitramfsConfig(PathBuf))
Signed-off-by: Damjan Georgievski <gdamjan@gmail.com>
This commit adds new option hotplug_method to memory config.
It can set the hotplug method to "acpi" or "virtio-mem".
Signed-off-by: Hui Zhu <teawater@antfin.com>
This change introduces a new CLI option --seccomp. This allows the user
to enable/disable the seccomp filters when needed. Because the user now
has the possibility to disable the seccomp filters, and because the
Cloud-Hypervisor project wants to enforce the maximum security by
default, the seccomp filters are now applied by default.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces the application of the seccomp filter to the VMM
thread. The filter is empty for now (SeccompLevel::None).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This opens the backing file read-only, makes the pages in the mmap()
read-only and also makes the KVM mapping read-only. The file is also
mapped with MAP_PRIVATE to make the changes local to this process only.
This is functional alternative to having support for making a
virtio-pmem device readonly. Unfortunately there is no concept of
readonly virtio-pmem (or any type of NVDIMM/PMEM) in the Linux kernel so
to be able to have a block device that is appears readonly in the guest
requires significant specification and kernel changes.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Extended attributes (xattr) support has a huge impact on write
performance. The reason for this is that, if enabled, FUSE sends a
setxattr request after each write operation, and due to the inode
locking inside the kernel during said request, the ability to execute
the operations in parallel becomes heavily limited.
Signed-off-by: Sergio Lopez <slp@redhat.com>
This change enables vhost_user_fs to process multiple requests in
parallel by scheduling them into a ThreadPool (from the Futures
crate).
Parallelism on a single file is limited by the nature of the operation
executed on it. A recent commit replaced the Mutex that protects the
File within HandleData with a RwLock, to allow some operations (at
this moment, only "read" and "write") to proceed in parallel by
acquiring a read lock.
A more complex approach was also implemented [1], involving
instrumentation through vhost_user_backend to be able to serialize
completions, reducing the pressure on the vring RwLock. This strategy
improved the performance on some corner cases, while making it worse
on other, more common ones. This fact, in addition to it requiring
wider changes through the source code, prompted me to drop it in favor
of this one.
[1] https://github.com/slp/cloud-hypervisor/tree/vuf_async
Signed-off-by: Sergio Lopez <slp@redhat.com>
This option was superseded by using "--net" with "vhost_user=true". This
option wasn't being parsed any more but was left over.
Fixes: #806
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Some of the help strings had extra newlines in them or otherwise strange
wrapping. The strings were rewrapped with the nightly version of rustfmt
that supports string formatting.
Fixes: #899
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This change, combined with the compiler hint to inline get_used_event,
shortens the window between the memory read and the actual check by
calling get_used_event from needs_notification.
Without it, when putting enough pressure on the vring, it's possible
that a notification is wrongly omitted, causing the queue to stall.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Add the ability to specify the "id" associated with a device, by adding
an extra option to the parameter --device.
This new option is not mandatory, and by default, the VMM will take care
of finding a unique identifier.
If the identifier provided by the user through this new option is not
unique, an error will be thrown and the VM won't be started.
Fixes#881
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Support sending a request body this will usually be JSON encoded data
representing the details of the request.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit introduces a basic implementation of a remote control of a
running VMM implementing a subset of the API.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
We weren't processing events arriving at the HIPRIO queue, which
implied ignoring FUSE_INTERRUPT, FUSE_FORGET, and FUSE_BATCH_FORGET
requests.
One effect of this issue was that file descriptors weren't closed on
the server, so it eventually hits RLIMIT_NOFILE. Additionally, the
guest OS may hang while attempting to unmount the filesystem.
Signed-off-by: Sergio Lopez <slp@redhat.com>
vhost_user_fs doesn't really support all vhost protocol features, just
MQ and SLAVE_REQ, so return that in protocol_features().
Signed-off-by: Sergio Lopez <slp@redhat.com>
Add helpers to Vring and VhostUserSlaveReqHandler for EVENT_IDX, so
consumers of this crate can make use of this feature.
Signed-off-by: Sergio Lopez <slp@redhat.com>
The integration test test_memory_mergeable_on has been fairly unstable
for quite some time now. Because it can take some time for the VM to be
spawned and to be able to perform a correct measure of the PSS, this
commit simply increases the time before such measure is done.
This should return more accurate PSS results, which should help
stabilize the test.
Fixes#781
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that vhost_user_fs rust daemon supports virtiofs's dax mode, this adds
the two dax tests accordingly.
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
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>
