chore(tvix/[ca]store): Drop sled support completely in favor of redb r/8752

Over the past couple of months we've been using redb instead of sled as
the default filesystem-based database in PS and DS. I am confident that
we can get rid of sled completely now, and just keep redb.

Change-Id: I11fa1e4453e280253855f8eade990b37eb6965ae
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12567
Reviewed-by: yuka <yuka@yuka.dev>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Autosubmit: Ilan Joselevich <personal@ilanjoselevich.com>

1 files changed, 0 insertions, 263 deletions

diff --git a/tvix/castore/src/directoryservice/sled.rs b/tvix/castore/src/directoryservice/sled.rs
deleted file mode 100644
index 4f3a860d14e4..000000000000
--- a/tvix/castore/src/directoryservice/sled.rs
+++ /dev/null
@@ -1,263 +0,0 @@
-use futures::stream::BoxStream;
-use prost::Message;
-use std::ops::Deref;
-use std::path::Path;
-use std::sync::Arc;
-use tonic::async_trait;
-use tracing::{instrument, warn};
-
-use super::utils::traverse_directory;
-use super::{Directory, DirectoryGraph, DirectoryPutter, DirectoryService, LeavesToRootValidator};
-use crate::composition::{CompositionContext, ServiceBuilder};
-use crate::{proto, B3Digest, Error};
-
-#[derive(Clone)]
-pub struct SledDirectoryService {
-    db: sled::Db,
-}
-
-impl SledDirectoryService {
-    pub fn new<P: AsRef<Path>>(p: P) -> Result<Self, sled::Error> {
-        if p.as_ref() == Path::new("/") {
-            return Err(sled::Error::Unsupported(
-                "cowardly refusing to open / with sled".to_string(),
-            ));
-        }
-
-        let config = sled::Config::default()
-            .use_compression(false) // is a required parameter
-            .path(p);
-        let db = config.open()?;
-
-        Ok(Self { db })
-    }
-
-    pub fn new_temporary() -> Result<Self, sled::Error> {
-        let config = sled::Config::default().temporary(true);
-        let db = config.open()?;
-
-        Ok(Self { db })
-    }
-}
-
-#[async_trait]
-impl DirectoryService for SledDirectoryService {
-    #[instrument(skip(self, digest), fields(directory.digest = %digest))]
-    async fn get(&self, digest: &B3Digest) -> Result<Option<Directory>, Error> {
-        let resp = tokio::task::spawn_blocking({
-            let db = self.db.clone();
-            let digest = digest.clone();
-            move || db.get(digest.as_slice())
-        })
-        .await?
-        .map_err(|e| {
-            warn!("failed to retrieve directory: {}", e);
-            Error::StorageError(format!("failed to retrieve directory: {}", e))
-        })?;
-
-        match resp {
-            // The directory was not found, return
-            None => Ok(None),
-
-            // The directory was found, try to parse the data as Directory message
-            Some(data) => match proto::Directory::decode(&*data) {
-                Ok(directory) => {
-                    // Validate the retrieved Directory indeed has the
-                    // digest we expect it to have, to detect corruptions.
-                    let actual_digest = directory.digest();
-                    if actual_digest != *digest {
-                        return Err(Error::StorageError(format!(
-                            "requested directory with digest {}, but got {}",
-                            digest, actual_digest
-                        )));
-                    }
-
-                    let directory = directory.try_into().map_err(|e| {
-                        warn!("failed to retrieve directory: {}", e);
-                        Error::StorageError(format!("failed to retrieve directory: {}", e))
-                    })?;
-
-                    Ok(Some(directory))
-                }
-                Err(e) => {
-                    warn!("unable to parse directory {}: {}", digest, e);
-                    Err(Error::StorageError(e.to_string()))
-                }
-            },
-        }
-    }
-
-    #[instrument(skip(self, directory), fields(directory.digest = %directory.digest()))]
-    async fn put(&self, directory: Directory) -> Result<B3Digest, Error> {
-        tokio::task::spawn_blocking({
-            let db = self.db.clone();
-            move || {
-                let digest = directory.digest();
-
-                // store it
-                db.insert(
-                    digest.as_slice(),
-                    proto::Directory::from(directory).encode_to_vec(),
-                )
-                .map_err(|e| Error::StorageError(e.to_string()))?;
-
-                Ok(digest)
-            }
-        })
-        .await?
-    }
-
-    #[instrument(skip_all, fields(directory.digest = %root_directory_digest))]
-    fn get_recursive(
-        &self,
-        root_directory_digest: &B3Digest,
-    ) -> BoxStream<'static, Result<Directory, Error>> {
-        traverse_directory(self.clone(), root_directory_digest)
-    }
-
-    #[instrument(skip_all)]
-    fn put_multiple_start(&self) -> Box<(dyn DirectoryPutter + 'static)>
-    where
-        Self: Clone,
-    {
-        Box::new(SledDirectoryPutter {
-            tree: self.db.deref().clone(),
-            directory_validator: Some(Default::default()),
-        })
-    }
-}
-
-#[derive(serde::Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct SledDirectoryServiceConfig {
-    is_temporary: bool,
-    #[serde(default)]
-    /// required when is_temporary = false
-    path: Option<String>,
-}
-
-impl TryFrom<url::Url> for SledDirectoryServiceConfig {
-    type Error = Box<dyn std::error::Error + Send + Sync>;
-    fn try_from(url: url::Url) -> Result<Self, Self::Error> {
-        // sled doesn't support host, and a path can be provided (otherwise
-        // it'll live in memory only).
-        if url.has_host() {
-            return Err(Error::StorageError("no host allowed".to_string()).into());
-        }
-
-        // TODO: expose compression and other parameters as URL parameters?
-
-        Ok(if url.path().is_empty() {
-            SledDirectoryServiceConfig {
-                is_temporary: true,
-                path: None,
-            }
-        } else {
-            SledDirectoryServiceConfig {
-                is_temporary: false,
-                path: Some(url.path().to_string()),
-            }
-        })
-    }
-}
-
-#[async_trait]
-impl ServiceBuilder for SledDirectoryServiceConfig {
-    type Output = dyn DirectoryService;
-    async fn build<'a>(
-        &'a self,
-        _instance_name: &str,
-        _context: &CompositionContext,
-    ) -> Result<Arc<dyn DirectoryService>, Box<dyn std::error::Error + Send + Sync + 'static>> {
-        match self {
-            SledDirectoryServiceConfig {
-                is_temporary: true,
-                path: None,
-            } => Ok(Arc::new(SledDirectoryService::new_temporary()?)),
-            SledDirectoryServiceConfig {
-                is_temporary: true,
-                path: Some(_),
-            } => Err(Error::StorageError(
-                "Temporary SledDirectoryService can not have path".into(),
-            )
-            .into()),
-            SledDirectoryServiceConfig {
-                is_temporary: false,
-                path: None,
-            } => Err(Error::StorageError("SledDirectoryService is missing path".into()).into()),
-            SledDirectoryServiceConfig {
-                is_temporary: false,
-                path: Some(path),
-            } => Ok(Arc::new(SledDirectoryService::new(path)?)),
-        }
-    }
-}
-
-/// Buffers Directory messages to be uploaded and inserts them in a batch
-/// transaction on close.
-pub struct SledDirectoryPutter {
-    tree: sled::Tree,
-
-    /// The directories (inside the directory validator) that we insert later,
-    /// or None, if they were already inserted.
-    directory_validator: Option<DirectoryGraph<LeavesToRootValidator>>,
-}
-
-#[async_trait]
-impl DirectoryPutter for SledDirectoryPutter {
-    #[instrument(level = "trace", skip_all, fields(directory.digest=%directory.digest()), err)]
-    async fn put(&mut self, directory: Directory) -> Result<(), Error> {
-        match self.directory_validator {
-            None => return Err(Error::StorageError("already closed".to_string())),
-            Some(ref mut validator) => {
-                validator
-                    .add(directory)
-                    .map_err(|e| Error::StorageError(e.to_string()))?;
-            }
-        }
-
-        Ok(())
-    }
-
-    #[instrument(level = "trace", skip_all, ret, err)]
-    async fn close(&mut self) -> Result<B3Digest, Error> {
-        match self.directory_validator.take() {
-            None => Err(Error::InvalidRequest("already closed".to_string())),
-            Some(validator) => {
-                // Insert all directories as a batch.
-                tokio::task::spawn_blocking({
-                    let tree = self.tree.clone();
-                    move || {
-                        // retrieve the validated directories.
-                        let directories = validator
-                            .validate()
-                            .map_err(|e| Error::StorageError(e.to_string()))?
-                            .drain_leaves_to_root()
-                            .collect::<Vec<_>>();
-
-                        // Get the root digest, which is at the end (cf. insertion order)
-                        let root_digest = directories
-                            .last()
-                            .ok_or_else(|| Error::InvalidRequest("got no directories".to_string()))?
-                            .digest();
-
-                        let mut batch = sled::Batch::default();
-                        for directory in directories {
-                            batch.insert(
-                                directory.digest().as_slice(),
-                                proto::Directory::from(directory).encode_to_vec(),
-                            );
-                        }
-
-                        tree.apply_batch(batch).map_err(|e| {
-                            Error::StorageError(format!("unable to apply batch: {}", e))
-                        })?;
-
-                        Ok(root_digest)
-                    }
-                })
-                .await?
-            }
-        }
-    }
-}