Commit Graph

57 Commits

Author SHA1 Message Date
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