chore: Add news fragment

Add documentation for the new performance-optimised Docker images with
"-maxperf" suffix. These use the release-max-perf build profile with LTO
and target haswell CPU architecture on amd64 for optimal performance.

Also restructure the static prebuilt binary section in generic deployment
docs for better clarity and fix various UK English spelling issues.

.forgejo/workflows/renovate.yml

@@ -43,7 +43,7 @@ jobs:
     name: Renovate
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/renovatebot/renovate:42.11.0@sha256:656c1e5b808279eac16c37b89562fb4c699e02fc7e219244f4a1fc2f0a7ce367
+      image: ghcr.io/renovatebot/renovate:42.70.2@sha256:3c2ac1b94fa92ef2fa4d1a0493f2c3ba564454720a32fdbcac2db2846ff1ee47
       options: --tmpfs /tmp:exec
     steps:
       - name: Checkout

.forgejo/workflows/update-flake-hashes.yml

@@ -23,7 +23,7 @@ jobs:
           persist-credentials: true
           token: ${{ secrets.FORGEJO_TOKEN }}
 
-      - uses: https://github.com/cachix/install-nix-action@7ab6e7fd29da88e74b1e314a4ae9ac6b5cda3801 # v31.8.0
+      - uses: https://github.com/cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
 

changelog.d/1271.feature

@@ -0,0 +1 @@
+Added admin command to forcefully log out all of a user's existing sessions. Contributed by @nex.

docs/deploying/docker.mdx

@@ -11,10 +11,10 @@ OCI images for Continuwuity are available in the registries listed below.
 
 | Registry        | Image                                                           | Notes                  |
 | --------------- | --------------------------------------------------------------- | -----------------------|
-| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:latest][fj]     | Latest tagged image.   |
-| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:main][fj]       | Main branch image.     |
-
-[fj]: https://forgejo.ellis.link/continuwuation/-/packages/container/continuwuity
+| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:latest](https://forgejo.ellis.link/continuwuation/-/packages/container/continuwuity/latest)     | Latest tagged image.   |
+| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:main](https://forgejo.ellis.link/continuwuation/-/packages/container/continuwuity/main)       | Main branch image.     |
+| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:latest-maxperf](https://forgejo.ellis.link/continuwuation/-/packages/container/continuwuity/latest-maxperf) | Performance optimised version. |
+| Forgejo Registry| [forgejo.ellis.link/continuwuation/continuwuity:main-maxperf](https://forgejo.ellis.link/continuwuation/-/packages/container/continuwuity/main-maxperf)   | Performance optimised version. |
 
 Use
 
@@ -24,6 +24,15 @@ docker image pull $LINK
 
 to pull it to your machine.
 
+#### Mirrors
+
+Images are mirrored to multiple locations automatically, on a schedule:
+
+- `ghcr.io/continuwuity/continuwuity`
+- `docker.io/jadedblueeyes/continuwuity`
+- `registry.gitlab.com/continuwuity/continuwuity`
+- `git.nexy7574.co.uk/mirrored/continuwuity` (releases only, no `main`)
+
 ### Run
 
 When you have the image, you can simply run it with
@@ -49,7 +58,7 @@ If you just want to test Continuwuity for a short time, you can use the `--rm`
 flag, which cleans up everything related to your container after you stop
 it.
 
-### Docker-compose
+### Docker Compose
 
 If the `docker run` command is not suitable for you or your setup, you can also use one
 of the provided `docker-compose` files.
@@ -158,8 +167,19 @@ docker buildx build --load --tag continuwuity:latest -f docker/Dockerfile .
 # Example: Build for specific platforms and push to a registry.
 # docker buildx build --platform linux/amd64,linux/arm64 --tag registry.io/org/continuwuity:latest -f docker/Dockerfile . --push
 
-# Example: Build binary optimized for the current CPU
-# docker buildx build --load --tag continuwuity:latest --build-arg TARGET_CPU=native -f docker/Dockerfile .
+# Example: Build binary optimised for the current CPU (standard release profile)
+# docker buildx build --load \
+#   --tag continuwuity:latest \
+#   --build-arg TARGET_CPU=native \
+#   -f docker/Dockerfile .
+
+# Example: Build maxperf variant (release-max-perf profile with LTO)
+# Optimised for runtime performance and smaller binary size, but requires longer build time
+# docker buildx build --load \
+#   --tag continuwuity:latest-maxperf \
+#   --build-arg TARGET_CPU=native \
+#   --build-arg RUST_PROFILE=release-max-perf \
+#   -f docker/Dockerfile .
 ```
 
 Refer to the Docker Buildx documentation for more advanced build options.
@@ -198,5 +218,3 @@ Alternatively, you can use Continuwuity's built-in delegation file capability. S
 ## Voice communication
 
 See the [TURN](../turn.md) page.
-
-[nix-buildlayeredimage]: https://ryantm.github.io/nixpkgs/builders/images/dockertools/#ssec-pkgs-dockerTools-buildLayeredImage

docs/deploying/generic.mdx

@@ -8,29 +8,39 @@
 
 ## Installing Continuwuity
 
-### Static prebuilt binary
+### Prebuilt binary
 
-You may simply download the binary that fits your machine architecture (x86_64
-or aarch64). Run `uname -m` to see what you need.
+Download the binary for your architecture (x86_64 or aarch64) -
+run the `uname -m` to check which you need.
 
-You can download prebuilt fully static musl binaries from the latest tagged
-release [here](https://forgejo.ellis.link/continuwuation/continuwuity/releases/latest) or
-from the `main` CI branch workflow artifact output. These also include Debian/Ubuntu
-packages.
+Prebuilt binaries are available from:
+- **Tagged releases**: [Latest release page](https://forgejo.ellis.link/continuwuation/continuwuity/releases/latest)
+- **Development builds**: CI artifacts from the `main` branch
+  (includes Debian/Ubuntu packages)
 
-You can download these directly using curl. The `ci-bins` are CI workflow binaries organized by commit
-hash/revision, and `releases` are tagged releases. Sort by descending last
-modified date to find the latest.
+When browsing CI artifacts, `ci-bins` contains binaries organised
+by commit hash, while `releases` contains tagged versions. Sort
+by last modified date to find the most recent builds.
 
-These binaries have jemalloc and io_uring statically linked and included with
-them, so no additional dynamic dependencies need to be installed.
+The binaries require jemalloc and io_uring on the host system. Currently
+we can't cross-build static binaries - contributions are welcome here.
 
-For the **best** performance: if you are using an `x86_64` CPU made in the last ~15 years,
-we recommend using the `-haswell-` optimized binaries. These set
-`-march=haswell`, which provides the most compatible and highest performance with
-optimized binaries. The database backend, RocksDB, benefits most from this as it
-uses hardware-accelerated CRC32 hashing/checksumming, which is critical
-for performance.
+#### Performance-optimised builds
+
+For x86_64 systems with CPUs from the last ~15 years, use the
+`-haswell-` optimised binaries for best performance. These
+binaries enable hardware-accelerated CRC32 checksumming in
+RocksDB, which significantly improves database performance.
+The haswell instruction set provides an excellent balance of
+compatibility and speed.
+
+If you're using Docker instead, equivalent performance-optimised
+images are available with the `-maxperf` suffix (e.g.
+`forgejo.ellis.link/continuwuation/continuwuity:latest-maxperf`).
+These images use the `release-max-perf`
+build profile with
+[link-time optimisation (LTO)](https://doc.rust-lang.org/cargo/reference/profiles.html#lto)
+and, for amd64, target the haswell CPU architecture.
 
 ### Compiling
 

src/admin/user/commands.rs

@@ -1017,3 +1017,29 @@ pub(super) async fn unlock(&self, user_id: String) -> Result {
 	self.write_str(&format!("User {user_id} has been unlocked."))
 		.await
 }
+
+#[admin_command]
+pub(super) async fn logout(&self, user_id: String) -> Result {
+	self.bail_restricted()?;
+	let user_id = parse_local_user_id(self.services, &user_id)?;
+	assert!(
+		self.services.globals.user_is_local(&user_id),
+		"Parsed user_id must be a local user"
+	);
+	if user_id == self.services.globals.server_user {
+		return Err!("Not allowed to log out the server service account.",);
+	}
+
+	if !self.services.users.exists(&user_id).await {
+		return Err!("User {user_id} does not exist.");
+	}
+	if self.services.users.is_admin(&user_id).await {
+		return Err!("You cannot forcefully log out admin users.");
+	}
+	self.services
+		.users
+		.all_device_ids(&user_id)
+		.for_each(|device_id| self.services.users.remove_device(&user_id, device_id))
+		.await;
+	self.write_str(&format!("User {user_id} has been logged out from all devices."))
+}

src/admin/user/mod.rs

@@ -59,6 +59,18 @@ pub enum UserCommand {
 		force: bool,
 	},
 
+	/// - Forcefully log a user out of all of their devices.
+	///
+	/// This will invalidate all access tokens for the specified user,
+	/// effectively logging them out from all sessions.
+	/// Note that this is destructive and may result in data loss for the user,
+	/// such as encryption keys. Use with caution. Can only be used in the admin
+	/// room.
+	Logout {
+		/// Username of the user to log out
+		user_id: String,
+	},
+
 	/// - Suspend a user
 	///
 	/// Suspended users are able to log in, sync, and read messages, but are not

src/api/client/membership/leave.rs

@@ -178,7 +178,20 @@ pub async fn leave_room(
 					.rooms
 					.state_cache
 					.left_state(user_id, room_id)
-					.await?
+					.await
+					.inspect_err(|err| {
+						// `left_state` may return an Err if the user _is_ in the room they're
+						// trying to leave, but the membership cache is incorrect and
+						// they're cached as being joined. In this situation
+						// we save a `None` to the `roomuserid_leftcount` table, which generates
+						// and sends a dummy leave to the client.
+						warn!(
+							?err,
+							"Trying to leave room not cached as leave, sending dummy leave \
+							 event to client"
+						);
+					})
+					.unwrap_or_default()
 			},
 		}
 	};