feat: upgrade database to redb v3 compatible format (#174)

## Description

The recently released redb v3 has incompatible changes to the database
format. The recommended upgrade procedure is to upgrade the database
with `Database::upgrade` on redb v2.6+. The upgrade has to be done on
redb v2, not v3. See
https://github.com/cberner/redb/blob/master/CHANGELOG.md#removes-support-for-file-format-v2.

This updates redb to 2.6 and performs the upgrade when opening the
database. Calling upgrade on an already upgraded database is a no-op.

With this merged in the next release, we can then update redb to v3 in
the version after.

## Breaking Changes

<!-- Optional, if there are any breaking changes document them,
including how to migrate older code. -->

## Notes & open questions

<!-- Any notes, remarks or open questions you have to make about the PR.
-->

## Change checklist

- [ ] Self-review.
- [ ] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.
- [ ] Tests if relevant.
- [ ] All breaking changes documented.

Author: Frando

.github/workflows/ci.yaml

@@ -204,7 +204,7 @@ jobs:
     - uses: actions/checkout@v5
     - uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: nightly-2024-11-30
+        toolchain: nightly-2025-09-28
     - name: Install sccache
       uses: mozilla-actions/[email protected]
 

.github/workflows/docs.yaml

@@ -32,7 +32,7 @@ jobs:
     - uses: actions/checkout@v5
     - uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: nightly-2024-11-30
+        toolchain: nightly-2025-09-28
     - name: Install sccache
       uses: mozilla-actions/[email protected]
 

Cargo.lock

@@ -42,7 +42,7 @@ genawaiter = { version = "0.99.1", features = ["futures03"] }
 iroh-base = "0.92"
 irpc = { version = "0.8.0", features = ["rpc", "quinn_endpoint_setup", "spans", "stream", "derive"], default-features = false }
 iroh-metrics = { version = "0.35" }
-redb = { version = "=2.4", optional = true }
+redb = { version = "2.6.3", optional = true }
 reflink-copy = { version = "0.1.24", optional = true }
 
 [dev-dependencies]

Cargo.toml

@@ -36,7 +36,7 @@ mod proto;
 pub use proto::*;
 pub(crate) mod tables;
 use tables::{ReadOnlyTables, ReadableTables, Tables};
-use tracing::{debug, error, info_span, trace, Span};
+use tracing::{debug, error, info, info_span, trace, warn, Span};
 
 use super::{
     delete_set::DeleteHandle,
@@ -475,13 +475,18 @@ impl Actor {
         options: BatchOptions,
     ) -> anyhow::Result<Self> {
         debug!("creating or opening meta database at {}", db_path.display());
-        let db = match redb::Database::create(db_path) {
+        let mut db = match redb::Database::create(db_path) {
             Ok(db) => db,
             Err(DatabaseError::UpgradeRequired(1)) => {
                 return Err(anyhow::anyhow!("migration from v1 no longer supported"));
             }
             Err(err) => return Err(err.into()),
         };
+        match db.upgrade() {
+            Ok(true) => info!("Database was upgraded to redb v3 compatible format"),
+            Ok(false) => {}
+            Err(err) => warn!("Database upgrade to redb v3 compatible format failed: {err:#}"),
+        }
         let tx = db.begin_write()?;
         let ftx = ds.begin_write();
         Tables::new(&tx, &ftx)?;