Commit Graph

120 Commits

Author SHA1 Message Date
dependabot-preview[bot]
f0d0d8ccaf build(deps): bump libc from 0.2.79 to 0.2.80
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.79 to 0.2.80.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.79...0.2.80)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-10-26 09:31:03 +00:00
dependabot-preview[bot]
c2cc26fc82 build(deps): bump libc from 0.2.78 to 0.2.79
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.78 to 0.2.79.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.78...0.2.79)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-10-05 07:02:05 +00:00
Rob Bradford
6a9934d933 build: Fix vm-memory bump build error
A new version of vm-memory was released upstream which resulted in some
components pulling in that new version. Update the version number used
to point to the latest version but continue to use our patched version
due to the fix for #1258

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-10-02 16:38:02 +01:00
dependabot-preview[bot]
76c3230e08 build(deps): bump libc from 0.2.77 to 0.2.78
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.77 to 0.2.78.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.77...0.2.78)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-10-01 05:40:02 +00:00
Rob Bradford
bd463324f3 build: Move to rust-vmm vhost crate
There is no need to point at our forked version any longer.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-09-11 13:43:57 +02:00
dependabot-preview[bot]
f24a12913a build(deps): bump libc from 0.2.76 to 0.2.77
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.76 to 0.2.77.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.76...0.2.77)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-09-10 06:45:09 +00:00
dependabot-preview[bot]
57ff608be9 build(deps): bump libc from 0.2.74 to 0.2.76
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.74 to 0.2.76.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.74...0.2.76)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-08-21 07:08:35 +00:00
dependabot-preview[bot]
12c5b7668a build(deps): bump libc from 0.2.73 to 0.2.74
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.73 to 0.2.74.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.73...0.2.74)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-28 20:46:37 +00:00
dependabot-preview[bot]
12b37ef13b build(deps): bump libc from 0.2.72 to 0.2.73
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.72 to 0.2.73.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.72...0.2.73)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-20 05:15:24 +00:00
dependabot-preview[bot]
cc57467d10 build(deps): bump log from 0.4.8 to 0.4.11
Bumps [log](https://github.com/rust-lang/log) from 0.4.8 to 0.4.11.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/compare/0.4.8...0.4.11)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-16 05:33:44 +00:00
dependabot-preview[bot]
861337cc6f build(deps): bump libc from 0.2.71 to 0.2.72
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.71 to 0.2.72.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.71...0.2.72)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-08 05:11:25 +00:00
Rob Bradford
2a6eb31d5b vm-virtio, virtio-devices: Split device implementation from virt queues
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>
2020-07-02 17:09:28 +01:00
Rob Bradford
cc51fdb8a7 vhost_user_net: Use NetQueuePair from vm-virtio
The logic for handling the networking queues can now be shared between
the version running in vhost-user-net and vm-virtio.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-06-02 13:26:52 +02:00
dependabot-preview[bot]
aac87196d6 build(deps): bump vm-memory from 0.2.0 to 0.2.1
Bumps [vm-memory](https://github.com/rust-vmm/vm-memory) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/rust-vmm/vm-memory/releases)
- [Changelog](https://github.com/rust-vmm/vm-memory/blob/v0.2.1/CHANGELOG.md)
- [Commits](https://github.com/rust-vmm/vm-memory/compare/v0.2.0...v0.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-28 17:06:48 +01:00
dependabot-preview[bot]
a4bb96d45c build(deps): bump libc from 0.2.70 to 0.2.71
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.70 to 0.2.71.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.70...0.2.71)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-27 09:02:13 +02:00
Rob Bradford
b94d9a30d3 vhost_user_backend: Allow backends to know features that can be used
Previous to adding a a trait method to inform the backends of the acked
features backends can use features than the guest has not enabled which
could lead to unpredictable results.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-21 08:40:43 +02:00
Rob Bradford
a813b57f59 vm-virtio, vhost_user_{fs,block,backend}: Move EVENT_IDX handling
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>
2020-05-20 12:56:25 +02:00
Bo Chen
7c3e19c65a vhost_user_backend, vmm: Close leaked file descriptors
Explicit call to 'close()' is required on file descriptors allocated
from 'epoll::create()', which is missing for the 'EpollContext' and
'VringWorker'. This patch enforces to close the file descriptors by
reusing the Drop trait of the 'File' struct.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-05-19 09:22:09 +02:00
Sergio Lopez
c4bf383fd7 vhost_user_*: Create a vhost::Listener in advance
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>
2020-05-14 17:16:23 +02:00
dependabot-preview[bot]
2991fd2a48 build(deps): bump libc from 0.2.69 to 0.2.70
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.69 to 0.2.70.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.69...0.2.70)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-12 20:26:43 +02:00
Sebastien Boeuf
1a0a2c0182 vhost_user_backend: Provide the thread ID to handle_event()
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>
2020-04-14 14:11:41 +02:00
Sebastien Boeuf
cfffb7edb0 vhost_user_backend: Allow for one exit_event per thread
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>
2020-04-14 14:11:41 +02:00
Sebastien Boeuf
cd2b03f6ed vhost_user_backend: Return a list of vring workers
Now that multiple worker threads can be run from the backend crate, it
is important that each backend implementation can access every worker
thread.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-04-14 14:11:41 +02:00
Sebastien Boeuf
d9eec0de14 vhost_user_backend: Add the ability to start multiple threads
In order to support multiqueues running on multiple threads for
increasing the IO performances, this commit introduces a new function
queues_per_thread() to the VhostUserBackend trait.

This gives each backend implementation the opportunity to define which
queues belong to which thread.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-04-14 14:11:41 +02:00
Sebastien Boeuf
40e4dc6339 vhost_user_backend: Change handle_event as immutable
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>
2020-04-14 14:11:41 +02:00
dependabot-preview[bot]
886c0f9093 build(deps): bump libc from 0.2.68 to 0.2.69
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.68 to 0.2.69.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.68...0.2.69)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-04-14 09:27:04 +01:00
Rob Bradford
8acc15a63c build: Bump vm-memory and linux-loader dependencies
linux-loader depends on vm-memory so must be updated at the same time.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-03-23 14:27:41 +00:00
dependabot-preview[bot]
51f51ea17d build(deps): bump libc from 0.2.67 to 0.2.68
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.67 to 0.2.68.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.67...0.2.68)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-03-17 21:36:38 +00:00
Sergio Lopez
3957d1ee27 vhost_user_backend: call get_used_event from needs_notification
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>
2020-03-12 14:34:21 +00:00
Rob Bradford
f0a3e7c4a1 build: Bump linux-loader and vm-memory dependencies
linux-loader now uses the released vm-memory so we must move to that
version at the same time.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-03-05 11:01:30 +01:00
Eryu Guan
5200bf3c59 Cargo: switch vhost_rs to external crate
As cloud-hypervisor/vhost crate (dragonball branch) is ready to be used,
switch vhost_rs from internal crate to the external one.

Signed-off-by: Eryu Guan <eguan@linux.alibaba.com>
2020-03-03 13:14:45 +00:00
dependabot-preview[bot]
f190cb05b5 build(deps): bump libc from 0.2.66 to 0.2.67
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.66 to 0.2.67.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.66...0.2.67)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-02-21 08:03:30 +00:00
Rob Bradford
4ebf01b344 vhost_user_backend: Don't report out socket broken errors
This is a perfectly acceptable situation as it causes the backend to
exit because the VMM has closed the connection. This addresses the
rather ugly reporting of errors from the backend that appears
interleaved with the output from the VMM.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-20 14:30:27 +00:00
Sergio Lopez
1ef6996207 vhost_user_backend: Add helpers for EVENT_IDX
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>
2020-02-19 17:13:47 +00:00
Liu Bo
59958f0a61 vhost_user_fs: add the ability to set slave req fd
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>
2020-02-19 07:52:50 +00:00
Rob Bradford
759a0be6cd vhost_user_backend: Add support for handling exiting of worker thread
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>
2020-02-11 15:21:07 +01:00
Rob Bradford
613f254908 vhost_user_backend: Wait on the worker thread
Check the return value from the worker thread by saving the thread
handle and waiting for it to return.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-10 09:16:49 +01:00
Rob Bradford
f1e19d6c96 vhost_user_backend: Forward the error from main thread
The main thread returns a Result with any errors from it. Although the
error from the join itself was being returned the real error from the
thread was being ignored so ensure that it is forwarded.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-10 09:16:49 +01:00
Rob Bradford
80c9dc2e0c Revert "vhost-user-backend: Correct error handling in run"
This reverts commit 4a1af7f63c.

This change erroneously ignored the return value for the result which
meant that requests to break out of the loop due to a kill event were
lost.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-10 09:16:49 +01:00
Sebastien Boeuf
3447e226d9 dependencies: bump vm-memory from 4237db3 to f3d1c27
This commit updates Cloud-Hypervisor to rely on the latest version of
the vm-memory crate.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-02-06 11:40:45 +01:00
Rob Bradford
c61104df47 vmm: Port to latest vmm-sys-util
The signal handling for vCPU signals has changed in the latest release
so switch to the new API.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-12-11 14:11:11 +00:00
Sergio Lopez
669d9a8ae8 vhost_user_backend: fix memory region offsetting
The way in which offsets are currently use in memory regions is
derived from QEMU's contrib/libvhost-user, but while this one works
mainly by translating vmm va's to local va's, vm-memory expects us to
use proper guest addresses and thus, define memory regions that
actually match the guest's memory disposition.

With this change, we create the memory regions with the proper length
and offsets, extend AddrMapping to store the guest physical address,
and use the latter instead of offset in vmm_va_to_gpa().

Signed-off-by: Sergio Lopez <slp@redhat.com>
2019-12-02 01:57:25 -08:00
Samuel Ortiz
0f21781fbe cargo: Bump the kvm and vmm-sys-util crates
Since the kvm crates now depend on vmm-sys-util, the bump must be
atomic.
The kvm-bindings and ioctls 0.2.0 and 0.4.0 crates come with a few API
changes, one of them being the use of a kvm_ioctls specific error type.
Porting our code to that type makes for a fairly large diff stat.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-11-29 17:48:02 +00:00
dependabot-preview[bot]
ca97385da5 build(deps): bump libc from 0.2.65 to 0.2.66
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.65 to 0.2.66.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.65...0.2.66)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2019-11-29 13:00:02 +00:00
Jose Carlos Venegas Munoz
7498647e3f cargo: Update micro_http
Update micro_http create to allow set content type.

Suggested-by:  Samuel Ortiz <sameo@linux.intel.com>
Tested-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>

Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
2019-11-08 22:49:08 +01:00
Sergio Lopez
ceafd4cee7 vhost_user_backend: remove ownership check in set_features()
set_features() fails with InvalidOperation if !self.owned. I don't see
this as a requirement in the specification and, in fact, vm-virtio
implementation for resetting the device calls SET_FEATURES just after
RESET_OWNER.

Signed-off-by: Sergio Lopez <slp@redhat.com>
2019-11-07 10:36:30 +00:00
Sergio Lopez
08bebaae4f vhost_user_backend: move protocol_features to the backend
Extend VhostUserBackend trait with protocol_features(), so device
backend implementations can freely define which protocol features they
want to support.

Signed-off-by: Sergio Lopez <slp@redhat.com>
2019-11-07 10:36:30 +00:00
Sergio Lopez
85e936d4bd vhost_rs: fix VhostUserConfig payload management
The VhostUserConfig carries a message with a payload, the contents of
which depend on the kind of device being emulated.

With this change, we calculate the offset of the payload within the
message, check its size corresponds to the expected one, and pass it
to the backend as a reference to a slice adjusted to the payload
dimensions.

The backend will be responsible of validating the payload, as it's the
one aware of its expected contents.

Signed-off-by: Sergio Lopez <slp@redhat.com>
2019-11-07 10:36:30 +00:00
Sebastien Boeuf
587a420429 cargo: Update to the latest kvm-ioctls version
We need to rely on the latest kvm-ioctls version to benefit from the
recent addition of unregister_ioevent(), allowing us to detach a
previously registered eventfd to a PIO or MMIO guest address.

Because of this update, we had to modify the current constraint we had
on the vmm-sys-util crate, using ">= 0.1.1" instead of being strictly
tied to "0.2.0".

Once the dependency conflict resolved, this commit took care of fixing
build issues caused by recent modification of kvm-ioctls relying on
EventFd reference instead of RawFd.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-10-31 09:30:59 +01:00
Samuel Ortiz
de9eb3e0fa Bump vmm-sys-utils to 0.2.0
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-10-23 11:35:11 +03:00
dependabot-preview[bot]
2d7bfdd920 build(deps): bump libc from 0.2.64 to 0.2.65
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.64 to 0.2.65.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.64...0.2.65)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2019-10-18 08:53:20 +00:00
dependabot-preview[bot]
3bb51d4d5e build(deps): bump libc from 0.2.62 to 0.2.64
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.62 to 0.2.64.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.62...0.2.64)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2019-10-15 19:46:54 +00:00
Samuel Ortiz
14eb071b29 Cargo: Move to crates.io vmm-sys-util
Use the newly published 0.1.1 version.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-10-08 07:28:53 -07:00
Sebastien Boeuf
9ff42060e0 vhost_user_backend: Fix clippy issues
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 13:06:00 -07:00
Cathy Zhang
db151819f1 Cargo.toml: Add workspace config changes
Remove workspace from vhost_user_backend/Cargo.toml to have
vhost-user-backend compiled in cloud-hypervisor. Add workspace in
Cargo.toml to have vhost-user-backend consumed by vhost-user-net.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-09-30 13:06:00 -07:00
Sebastien Boeuf
09392f0530 vhost_user_backend: Fix remaining issues
This commit fixes all the remaining issues that were found as part of
the integration with vhost-user-net.

It fixes the way to notify that a vring is used, by using the proper
EventFd.

It removes the process_queue() function from the trait, since the
complexity it was introducing was leading to deadlocks with mutexes.

It moves the register/unregister functions for registering custom events
from the backend, from the VringEpollHandler to the VringWorker. This
allows for a lot of simplification and solve a deadlock issue.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Cathy Zhang
527dd68ce1 vhost_user_backend: Update vmm_va_to_gpa with adding offset
The original logic does not has any problem without offset, since the
current offset is zero. However, if offset is not zero, while convert
vmm address to backend process address, it needs to consider the
offset.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-09-30 09:26:11 -07:00
Cathy Zhang
4a1af7f63c vhost-user-backend: Correct error handling in run
The error handling here to trigger break epoll seems not correct,
epoll will be ended once one event is handled, no matter successfully
or failed. Fix it.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-09-30 09:26:11 -07:00
Cathy Zhang
c4309515c9 vhost-user-backend: Remove one checking from set_features
The vhost-user protocol does not indicate set_features could not
be issued more than once, the checking is not needed at all, and
prevent communication between master and slave. Remove it to
fix the issue.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
347611b0c7 vhost_user_backend: Pass a backend that can be modified
This patch modifies the library so that a consumer can update the
backend after it's been passed to the daemon.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
f14ab872ec vhost_user_backend: Give access to the EpollVringHandler
By letting the consumer of this crate getting access to the vring
handler, we will be able to let it perform several actions without
producing a deadlock.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
cfc8c39446 vhost_user_backend: Provide some default trait implementations
We cannot expect every backend to support GET_CONFIG and SET_CONFIG
commands. That's why this patch adds some default implementations for
the trait VhostUserBackend regarding both get_config() and set_config()
functions.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
1aab372a06 vhost_user_backend: Make the backend a server
The code needs to initialize a listener to accept connection from the
VMM being the client in this case.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
c1b26b1fab vhost_user_backend: Don't process disabled queues
Every time an event is triggered, it needs to be read, but only based on
the status of the vring (enabled or not) will decide if the queue needs
to be processed.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
d80ac43ef1 vhost_user_backend: Remove useless started field
The Queue structure already contains a field "ready" that can be used to
track the status of the vrings.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
5f076923d3 vhost_user_backend: Allow for proper error propagation
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
36de390caf vhost_user_backend: Make some trait functions as mutable
Let's be realistic, the trait VhostUserBackend will need to have mutable
self for some functions like handle_event, process_queue and set_config,
which is the reason why this commit needs to introduce a RwLock on the
backend instance that was passed around as a simple Arc.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
d4f7f73bc8 vhost_user_backend: Move to a per-queue RwLock
Instead of locking every queues whenever something needs to be updated,
this patch modifies the code design to lock each Vring independently.
This allows for much finer granularity, and will allow multiple queues
to be handled at the same time.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
4ed81894aa vhost_user_backend: Replace Mutex with RwLock when possible
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00
Sebastien Boeuf
2e2cad91ae vhost_user_backend: Add new crate
The purpose of this new crate is to provide a common library to all
vhost-user backend implementations. The more is handled by this library,
the less duplication will need to happen in each vhost-user daemon.

This crate relies a lot on vhost_rs, vm-memory and vm-virtio crates.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-30 09:26:11 -07:00