diff options
Diffstat (limited to 'tvix/castore/src/import/archive.rs')
| -rw-r--r-- | tvix/castore/src/import/archive.rs | 111 |
1 files changed, 13 insertions, 98 deletions
diff --git a/tvix/castore/src/import/archive.rs b/tvix/castore/src/import/archive.rs index 0ebb4a236117..167f799efa0f 100644 --- a/tvix/castore/src/import/archive.rs +++ b/tvix/castore/src/import/archive.rs @@ -1,38 +1,23 @@ //! Imports from an archive (tarballs) use std::collections::HashMap; -use std::io::{Cursor, Write}; -use std::sync::Arc; use petgraph::graph::{DiGraph, NodeIndex}; use petgraph::visit::{DfsPostOrder, EdgeRef}; use petgraph::Direction; use tokio::io::AsyncRead; -use tokio::sync::Semaphore; -use tokio::task::JoinSet; use tokio_stream::StreamExt; use tokio_tar::Archive; -use tokio_util::io::InspectReader; use tracing::{instrument, warn, Level}; use crate::blobservice::BlobService; use crate::directoryservice::DirectoryService; use crate::import::{ingest_entries, IngestionEntry, IngestionError}; -use crate::proto::node::Node; -use crate::B3Digest; +use crate::Node; -type TarPathBuf = std::path::PathBuf; - -/// Files smaller than this threshold, in bytes, are uploaded to the [BlobService] in the -/// background. -/// -/// This is a u32 since we acquire a weighted semaphore using the size of the blob. -/// [Semaphore::acquire_many_owned] takes a u32, so we need to ensure the size of -/// the blob can be represented using a u32 and will not cause an overflow. -const CONCURRENT_BLOB_UPLOAD_THRESHOLD: u32 = 1024 * 1024; +use super::blobs::{self, ConcurrentBlobUploader}; -/// The maximum amount of bytes allowed to be buffered in memory to perform async blob uploads. -const MAX_TARBALL_BUFFER_SIZE: usize = 128 * 1024 * 1024; +type TarPathBuf = std::path::PathBuf; #[derive(Debug, thiserror::Error)] pub enum Error { @@ -57,13 +42,6 @@ pub enum Error { #[error("unable to read link name field for {0}: {1}")] LinkName(TarPathBuf, std::io::Error), - #[error("unable to read blob contents for {0}: {1}")] - BlobRead(TarPathBuf, std::io::Error), - - // FUTUREWORK: proper error for blob finalize - #[error("unable to finalize blob {0}: {1}")] - BlobFinalize(TarPathBuf, std::io::Error), - #[error("unsupported tar entry {0} type: {1:?}")] EntryType(TarPathBuf, tokio_tar::EntryType), @@ -72,6 +50,9 @@ pub enum Error { #[error("unexpected number of top level directory entries")] UnexpectedNumberOfTopLevelEntries, + + #[error(transparent)] + BlobUploadError(#[from] blobs::Error), } /// Ingests elements from the given tar [`Archive`] into a the passed [`BlobService`] and @@ -94,8 +75,7 @@ where // In the first phase, collect up all the regular files and symlinks. let mut nodes = IngestionEntryGraph::new(); - let semaphore = Arc::new(Semaphore::new(MAX_TARBALL_BUFFER_SIZE)); - let mut async_blob_uploads: JoinSet<Result<(), Error>> = JoinSet::new(); + let mut blob_uploader = ConcurrentBlobUploader::new(blob_service); let mut entries_iter = archive.entries().map_err(Error::Entries)?; while let Some(mut entry) = entries_iter.try_next().await.map_err(Error::NextEntry)? { @@ -110,77 +90,14 @@ where tokio_tar::EntryType::Regular | tokio_tar::EntryType::GNUSparse | tokio_tar::EntryType::Continuous => { - let header_size = header + let size = header .size() .map_err(|e| Error::Size(tar_path.clone(), e))?; - // If the blob is small enough, read it off the wire, compute the digest, - // and upload it to the [BlobService] in the background. - let (size, digest) = if header_size <= CONCURRENT_BLOB_UPLOAD_THRESHOLD as u64 { - let mut buffer = Vec::with_capacity(header_size as usize); - let mut hasher = blake3::Hasher::new(); - let mut reader = InspectReader::new(&mut entry, |bytes| { - hasher.write_all(bytes).unwrap(); - }); - - // Ensure that we don't buffer into memory until we've acquired a permit. - // This prevents consuming too much memory when performing concurrent - // blob uploads. - let permit = semaphore - .clone() - // This cast is safe because ensure the header_size is less than - // CONCURRENT_BLOB_UPLOAD_THRESHOLD which is a u32. - .acquire_many_owned(header_size as u32) - .await - .unwrap(); - let size = tokio::io::copy(&mut reader, &mut buffer) - .await - .map_err(|e| Error::Size(tar_path.clone(), e))?; - - let digest: B3Digest = hasher.finalize().as_bytes().into(); - - { - let blob_service = blob_service.clone(); - let digest = digest.clone(); - async_blob_uploads.spawn({ - let tar_path = tar_path.clone(); - async move { - let mut writer = blob_service.open_write().await; - - tokio::io::copy(&mut Cursor::new(buffer), &mut writer) - .await - .map_err(|e| Error::BlobRead(tar_path.clone(), e))?; - - let blob_digest = writer - .close() - .await - .map_err(|e| Error::BlobFinalize(tar_path, e))?; - - assert_eq!(digest, blob_digest, "Tvix bug: blob digest mismatch"); - - // Make sure we hold the permit until we finish writing the blob - // to the [BlobService]. - drop(permit); - Ok(()) - } - }); - } - - (size, digest) - } else { - let mut writer = blob_service.open_write().await; - - let size = tokio::io::copy(&mut entry, &mut writer) - .await - .map_err(|e| Error::BlobRead(tar_path.clone(), e))?; - - let digest = writer - .close() - .await - .map_err(|e| Error::BlobFinalize(tar_path.clone(), e))?; - - (size, digest) - }; + let digest = blob_uploader + .upload(&path, size, &mut entry) + .await + .map_err(Error::BlobUploadError)?; let executable = entry .header() @@ -219,9 +136,7 @@ where nodes.add(entry)?; } - while let Some(result) = async_blob_uploads.join_next().await { - result.expect("task panicked")?; - } + blob_uploader.join().await.map_err(Error::BlobUploadError)?; let root_node = ingest_entries( directory_service, |