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Albert Esteve 03c9524bc4 vhost-user: Add support for GET_SHMEM_CONFIG message 
Add support for GET_SHMEM_CONFIG message to retrieve
VirtIO Shared Memory Regions configuration.

This is useful when the frontend is unaware of specific
backend type and configuration of the memory layout.

Based on the patch [1] which is just waiting for being
merged.

[1] -
https://lore.kernel.org/all/20251111091058.879669-1-aesteve@redhat.com/

Signed-off-by: Albert Esteve <aesteve@redhat.com>
2026-02-26 15:57:06 +02:00

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# Changelog
## [Unreleased]
### Added
- [[#339]](https://github.com/rust-vmm/vhost/pull/339) Add support for `GET_SHMEM_CONFIG` message
### Changed
### Deprecated
### Fixed
- [[#343]](https://github.com/rust-vmm/vhost/pull/343) Avoid losing vring kicks
## v0.21.0
### Changed
- [[#308]](https://github.com/rust-vmm/vhost/pull/308) Replace Eventfd with EventNotifier/EventConsumer.
- [[#321]](https://github.com/rust-vmm/vhost/pull/321) Don't take ownership of listener in `VhostUserDaemon::start`.
- [[#333]](https://github.com/rust-vmm/vhost/pull/333) Updated virtio-queue to 0.17.0, vm-memory to 0.17.1, vmm-sys-util to 0.15.0 and vhost to 0.15.0
## v0.20.0
### Changed
- [[306]](https://github.com/rust-vmm/vhost/pull/306) Updated virtio-queue to v0.16.0 and virtio-bindings to v0.2.6
## v0.19.0
### Changed
- [[299]](https://github.com/rust-vmm/vhost/pull/299) Updated virtio-queue to v0.15.0 and virtio-bindings to v0.2.5
## v0.18.0
### Added
- [[#268]](https://github.com/rust-vmm/vhost/pull/268) Add support for `VHOST_USER_GET_SHARED_OBJECT`
### Changed
- [[#295]](https://github.com/rust-vmm/vhost/pull/295) Updated vm-memory to 0.16.2 and vmm-sys-util to 0.14.0
## v0.17.0
### Added
- [[#266]](https://github.com/rust-vmm/vhost/pull/266) Add support for `VHOST_USER_RESET_DEVICE`
### Changed
- [[#269]](https://github.com/rust-vmm/vhost/pull/269) Update vm-memory to 0.16.0 and virtio-queue to 0.13.0
## v0.16.1
### Fixed
- [[#267]](https://github.com/rust-vmm/vhost/pull/267) Fix feature unification issues with gpu-socket feature.
## v0.16.0 - yanked
This version got yanked because the `gpu_socket` feature introduced in this
release was causing problems
(see [#265](https://github.com/rust-vmm/vhost/issues/265)).
Starting with the next version (v0.16.1), the `gpu_socket` feature was removed.
### Added
- [[#241]](https://github.com/rust-vmm/vhost/pull/241) Add shared objects support
- [[#239]](https://github.com/rust-vmm/vhost/pull/239) Add support for `VHOST_USER_GPU_SET_SOCKET`
### Changed
- [[#257]](https://github.com/rust-vmm/vhost/pull/257) Update virtio-queue version from 0.12.0 to 0.13.0 and vm-memory from 0.14.0 to 0.15.0.
- [[#240]](https://github.com/rust-vmm/vhost/pull/240) Move the set of event_idx property from set_vring_base callback to set_features one
## v0.15.0
### Changed
- [[#237]](https://github.com/rust-vmm/vhost/pull/237) Update virtio-queue dependency to 0.12.0
## v0.14.0
### Added
- [[#203]](https://github.com/rust-vmm/vhost/pull/203) Add back-end's internal state migration support
- [[#218]](https://github.com/rust-vmm/vhost/pull/218) Adding POSTCOPY support
- [[#206]](https://github.com/rust-vmm/vhost/pull/206) Add bitmap support for tracking dirty pages during migration
## v0.13.1
### Fixed
- [[#227]](https://github.com/rust-vmm/vhost/pull/227) vhost-user-backend: Fix SET_VRING_KICK should not disable the vring
## v0.13.0
### Changed
- [[#224]](https://github.com/rust-vmm/vhost/pull/224) vhost-user-backend: bump up MAX_MEM_SLOTS to 509
## v0.12.0
### Fixed
- [[#210]](https://github.com/rust-vmm/vhost/pull/210) Enable all vrings upon receipt of `VHOST_USER_SET_FEATURES`
message.
- [[#212]](https://github.com/rust-vmm/vhost/pull/212) Validate queue index in `VhostUserHandler::set_vring_base`
to avoid potential out-of-bounds panic.
### Changed
- [[#214]](https://github.com/rust-vmm/vhost/pull/214) Avoid indexing the same Vec multiple times by locally caching the
result of `Vec:get`.
- [[#219]](https://github.com/rust-vmm/vhost/pull/219) Update vmm-sys-util dependency to 0.12.1 and vm-memory dependency to 0.14.0.
## v0.11.0
### Added
- [[#173]](https://github.com/rust-vmm/vhost/pull/173) vhost-user-backend: Added convenience function `serve`
### Changed
- [[#187]](https://github.com/rust-vmm/vhost/pull/187) Clean master slave
- Replaced master/slave with frontend/backend in the codebase and public API.
- [[#192]](https://github.com/rust-vmm/vhost/pull/192) vhost-user-backend: remove return value from handle_event
- [[#155]](https://github.com/rust-vmm/vhost/pull/155) Converted generic type
parameters of VhostUserBackend into associated types.
- [[#116]](https://github.com/rust-vmm/vhost/pull/116) Upgrade to 2021 edition
## v0.10.1
### Fixed
- [[#180]](https://github.com/rust-vmm/vhost/pull/180) vhost-user-backend: fetch 'used' index from guest
## v0.10.0
### Added
- [[#169]](https://github.com/rust-vmm/vhost/pull/160) vhost-user-backend: Add support for Xen memory mappings
### Fixed
- [[#161]](https://github.com/rust-vmm/vhost/pull/161) get_vring_base should not reset the queue
## v0.9.0
### Added
- [[#138]](https://github.com/rust-vmm/vhost/pull/138): vhost-user-backend: add repository metadata
### Changed
- Updated dependency virtio-bindings 0.1.0 -> 0.2.0
- Updated dependency virtio-queue 0.7.0 -> 0.8.0
- Updated dependency vm-memory 0.10.0 -> 0.11.0
### Fixed
- [[#154]](https://github.com/rust-vmm/vhost/pull/154): Fix return value of GET_VRING_BASE message
- [[#142]](https://github.com/rust-vmm/vhost/pull/142): vhost_user: Slave requests aren't only FS specific
## v0.8.0
### Added
- [[#120]](https://github.com/rust-vmm/vhost/pull/120): vhost_kern: vdpa: Add missing ioctls
### Changed
- Updated dependency vhost 0.5 -> 0.6
- Updated dependency virtio-queue 0.6 -> 0.7.0
- Updated depepdency vm-memory 0.9 to 0.10.0
- Updated depepdency vmm-sys-util 0.10 to 0.11.0
## v0.7.0
### Changed
- Started using caret dependencies
- Updated dependency nix 0.24 -> 0.25
- Updated depepdency log 0.4.6 -> 0.4.17
- Updated dependency vhost 0.4 -> 0.5
- Updated dependency virtio-queue 0.5.0 -> 0.6
- Updated dependency vm-memory 0.7 -> 0.9
## v0.6.0
### Changed
- Moved to rust-vmm/virtio-queue v0.5.0
### Fixed
- Fixed vring initialization logic
## v0.5.1
### Changed
- Moved to rust-vmm/vmm-sys-util 0.10.0
## v0.5.0
### Changed
- Moved to rust-vmm/virtio-queue v0.4.0
## v0.4.0
### Changed
- Moved to rust-vmm/virtio-queue v0.3.0
- Relaxed rust-vmm/vm-memory dependency to require ">=0.7"
## v0.3.0
### Changed
- Moved to rust-vmm/vhost v0.4.0
## v0.2.0
### Added
- Ability to run the daemon as a client
- VringEpollHandler implements AsRawFd
## v0.1.0
First release
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