Add raw file backend

common/src/lib.rs

@@ -146,6 +146,15 @@ pub enum CrucibleError {
 
     #[error("Invalid downstairs replace {0}")]
     ReplaceRequestInvalid(String),
+
+    #[error("missing context slot for block {0}")]
+    MissingContextSlot(u64),
+
+    #[error("metadata deserialization failed: {0}")]
+    BadMetadata(String),
+
+    #[error("context slot deserialization failed: {0}")]
+    BadContextSlot(String),
 }
 
 impl From<std::io::Error> for CrucibleError {
@@ -386,7 +395,10 @@ impl From<CrucibleError> for dropshot::HttpError {
             | CrucibleError::SubvolumeSizeMismatch
             | CrucibleError::UpstairsAlreadyActive
             | CrucibleError::UpstairsDeactivating
-            | CrucibleError::UuidMismatch => {
+            | CrucibleError::UuidMismatch
+            | CrucibleError::MissingContextSlot(..)
+            | CrucibleError::BadMetadata(..)
+            | CrucibleError::BadContextSlot(..) => {
                 dropshot::HttpError::for_internal_error(e.to_string())
             }
         }

common/src/region.rs

@@ -274,7 +274,7 @@ impl RegionDefinition {
     }
 }
 
-#[derive(Deserialize, Serialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Clone, Debug, PartialEq)]
 pub struct RegionOptions {
     /**
      * The size of each block in bytes.  Must be a power of 2, minimum 512.

downstairs/Cargo.toml

@@ -22,6 +22,7 @@ hex.workspace = true
 http.workspace = true
 hyper-staticfile.workspace = true
 hyper.workspace = true
+itertools.workspace = true
 libc.workspace = true
 mime_guess.workspace = true
 nix.workspace = true
@@ -69,3 +70,4 @@ version_check = "0.9.4"
 asm = ["usdt/asm"]
 default = []
 zfs_snapshot = []
+integration-tests = [] # Enables creating SQLite volumes