lamzfs — third-party attribution
================================

lamzfs vendors the on-disk ZFS *decoders* from:

  rzfs  —  https://github.com/cybojanek/rzfs
  Commit: ea41cf0b5b29c17df92c4a631184aa1db5eb72a9
  Upstream license: GPL-2.0 OR MIT (per-file SPDX, dual)
  Copyright (c) the rzfs authors (cybojanek)

LICENSE ELECTION
----------------
rzfs is offered under "GPL-2.0 OR MIT". lamzfs ELECTS MIT and vendors the
derived files under MIT ONLY. Every vendored file's SPDX header has been changed
from `GPL-2.0 OR MIT` to `MIT`, with a provenance line recording the source
commit. The election is a downstream right of the `OR` license; no GPL terms
apply to lamzfs.

The MIT election was validated by a dependency audit at the vendored commit:
`rzfs/lib/Cargo.toml` declares an EMPTY `[dependencies]` section (zero runtime
dependencies), so nothing transitive can re-impose GPL-only terms. See
docs/PORTING-NOTES.md for the audit record.

WHAT IS VENDORED (MIT)
----------------------
The `src/phys/`, `src/checksum/`, `src/compression/`, and `src/util/` subtrees
(the format decoders, scalar checksums, and the LZJB decompressor) are ported
from rzfs `lib/src`. The std-only `userspace` block device layer, the
SIMD-accelerated checksum paths, the `arch` CPUID dispatch, and the
`exe`/`fuse`/`module` crates are not vendored — lamzfs is scalar-only and
`#![forbid(unsafe_code)]`.

WHAT IS NEW lamzfs CODE (MIT OR Apache-2.0)
-------------------------------------------
All other files — the pool import, vdev topology + DVA routing, dataset walk,
ZAP/path resolution, file read with decompression dispatch, the `BlockRead`
seam, and the public API and error surface — are original lamzfs code under
`MIT OR Apache-2.0` (see LICENSE-MIT, LICENSE-APACHE).

CRATE LICENSE FLOOR
-------------------
Because the vendored subtree is MIT-only, the crate's effective floor license is
`MIT` (Cargo.toml `license = "MIT"`). New files are additionally available under
Apache-2.0 per their SPDX headers. Microsoft Secure Boot signing accepts MIT; no
GPL code is linked.

The third-party decompressors lamzfs depends on at build time (`lz4_flex`,
`ruzstd`, `miniz_oxide`) are each permissive (MIT / MIT-or-Apache / Zlib) and
carry their own notices.
