1 files changed, 41 insertions, 0 deletions
diff --git a/tvix/castore/src/errors.rs b/tvix/castore/src/errors.rs
index 5bbcd7b04ef1..083f43036845 100644
--- a/tvix/castore/src/errors.rs
+++ b/tvix/castore/src/errors.rs
@@ -1,3 +1,4 @@
+use bstr::ByteSlice;
 use thiserror::Error;
 use tokio::task::JoinError;
 use tonic::Status;
@@ -12,6 +13,46 @@ pub enum Error {
     StorageError(String),
 }
 
+/// Errors that can occur during the validation of [Directory] messages.
+#[derive(Debug, thiserror::Error, PartialEq)]
+pub enum ValidateDirectoryError {
+    /// Elements are not in sorted order
+    #[error("{:?} is not sorted", .0.as_bstr())]
+    WrongSorting(Vec<u8>),
+    /// Multiple elements with the same name encountered
+    #[error("{:?} is a duplicate name", .0.as_bstr())]
+    DuplicateName(Vec<u8>),
+    /// Invalid node
+    #[error("invalid node with name {:?}: {:?}", .0.as_bstr(), .1.to_string())]
+    InvalidNode(Vec<u8>, ValidateNodeError),
+    #[error("Total size exceeds u32::MAX")]
+    SizeOverflow,
+}
+
+/// Errors that occur during Node validation
+#[derive(Debug, thiserror::Error, PartialEq)]
+pub enum ValidateNodeError {
+    #[error("No node set")]
+    NoNodeSet,
+    /// Invalid digest length encountered
+    #[error("invalid digest length: {0}")]
+    InvalidDigestLen(usize),
+    /// Invalid name encountered
+    #[error("Invalid name: {}", .0.as_bstr())]
+    InvalidName(bytes::Bytes),
+    /// Invalid symlink target
+    #[error("Invalid symlink target: {}", .0.as_bstr())]
+    InvalidSymlinkTarget(bytes::Bytes),
+}
+
+impl From<crate::digests::Error> for ValidateNodeError {
+    fn from(e: crate::digests::Error) -> Self {
+        match e {
+            crate::digests::Error::InvalidDigestLen(n) => ValidateNodeError::InvalidDigestLen(n),
+        }
+    }
+}
+
 impl From<JoinError> for Error {
     fn from(value: JoinError) -> Self {
         Error::StorageError(value.to_string())