Chris LuandGitHub f6032cf23d fix(ec): read chunk-manifest chunks stored on EC volumes (rust volume server) (#10187) ...

* fix(ec): read chunk-manifest chunks stored on EC volumes

Chunk-manifest expansion read every chunk through store.read_volume_needle,
which only resolves a local regular volume. Once a chunk's volume is
EC-encoded, that lookup returns NotFound and the GET fails 500 with
"read chunk ...: not found", so a chunked object over an EC tier is
unreadable even though its parity is intact and reconstructable.

Resolve each chunk to wherever it lives — a local regular volume, a
local EC volume (reconstruct-on-read from the surviving shards), or a
peer via master lookup — matching Go's ChunkedFileReader, which never
assumes chunks are local regular needles.

* fix(ec): validate the chunk cookie on local manifest chunk reads

A chunk fetched from a peer is cookie-checked by that peer's GET handler,
but the local regular and EC reads returned data without comparing the
needle's cookie to the one in the chunk fid. Check it, matching the main
GET paths, so a stale or guessed id can't serve another needle's bytes.

* fix(ec): clamp manifest chunk copy to its declared size

Expansion writes each chunk into result[offset..] by offset, so a chunk
whose bytes exceed its declared size could overwrite the next chunk's
window. Clamp the copy to chunk.size (and reject a negative size) so an
over-long or malformed chunk stays within its own range.

2026-07-01 13:38:34 -07:00

..

http_integration.rs

fix(ec): read chunk-manifest chunks stored on EC volumes (rust volume server) (#10187)

2026-07-01 13:38:34 -07:00