Commit Graph

120 Commits

Author SHA1 Message Date
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
b927dceed8 vhost_user_net: Prepare for multithreaded support
In order to prepare for the support of multithreaded multiqueues, the
structure VhostUserNetThread is simplified to hold only one RX queue,
one TX queue, and one TAP interface.

Following this change, VhostUserNetBackend now holds a list of threads
instead of going through each thread to handle multiqueues.

These changes decouple neatly the abstraction between the backend and
each thread. This allows for a lot of simplification since we now know
all threads are identical, hence the handling of events becomes very
straightforward.

One important point is that each thread can be locked when in use,
without causing any contention with other threads since the backend
doesn't need to be locked anymore.

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
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
Sebastien Boeuf
8f434df1fb vhost_user: Adapt backends to let handle_event be immutable
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>
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
Cathy Zhang
6341736286 vhost_user_net: Provide tap option for vhost_user_net backend
Provide vhost_user_net backend with the tap option, it allows to
use the existing tap interface.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-03-05 15:09:20 +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
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
Rob Bradford
700df9eb16 vhost_user_net: Port to new exit event strategy
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>
2020-02-11 15:21:07 +01:00
Rob Bradford
e619fe6b01 vhost_user_net: Remove "Clone" implementation
There is no need for this and it could lead to inadvertent issues in the
future.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-10 09:16:49 +01:00
Rob Bradford
97ab767a2f vhost_user_net: Shutdown worker thread on exit
This will ensure a clean shutdown of the backend

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-02-10 09:16:49 +01:00
Sebastien Boeuf
4587cc7ffa vhost_user_net: Fix map_err losing the inner error
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-01-24 12:42:09 +01:00
Rob Bradford
9fd187c9fe vhost_user_net: Split launching backend into its own function
Split the basic launching functionality into its own function in the
newly added vhost_user_net crate.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-01-23 10:30:06 +00:00
Rob Bradford
fb763c4043 vhost_user_net: Refactor vhost_user_net backend code into a new crate
Extract the majority of the code that provides the vhost-user-net
backend into its own crate and port the binary to use it.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-01-23 10:30:06 +00:00