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rust: Bind our default recommended max inline size #395

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rust: Bind our default recommended max inline size #395

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4 changes: 4 additions & 0 deletions rust/composefs-sys/src/lib.rs
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Original file line number Diff line number Diff line change
@@ -1,7 +1,11 @@
//! # Bindings for libcomposefs
//!
//! This crate contains a few manually maintained system bindings for libcomposefs.

/// Size of a SHA-256 digest in bytes.
pub const LCFS_SHA256_DIGEST_LEN: usize = 32;
/// Recommended inline content size.
pub const LCFS_RECOMMENDED_INLINE_CONTENT_MAX: u16 = 64;

extern "C" {
pub fn lcfs_compute_fsverity_from_fd(
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3 changes: 3 additions & 0 deletions rust/composefs/src/dumpfile.rs
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Expand Up @@ -23,6 +23,9 @@ use libc::S_IFDIR;

/// Maximum size accepted for inline content.
const MAX_INLINE_CONTENT: u16 = 5000;
/// The canonical default size to use for inline files.
pub const RECOMMENDED_MAX_INLINE_CONTENT: u16 = composefs_sys::LCFS_RECOMMENDED_INLINE_CONTENT_MAX;

/// https://github.com/torvalds/linux/blob/47ac09b91befbb6a235ab620c32af719f8208399/include/uapi/linux/limits.h#L15
/// This isn't exposed in libc/rustix, and in any case we should be conservative...if this ever
/// gets bumped it'd be a hazard.
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