crypto/jitterentropy-kcapi.c

File Facts

System

Linux kernel

Corpus path

crypto/jitterentropy-kcapi.c

Extension

.c

Size

9582 bytes

Lines

315

Domain

Kernel Services

Bucket

crypto

Inferred role

Kernel Services: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• crypto/sha3.h
• linux/fips.h
• linux/kernel.h
• linux/module.h
• linux/mutex.h
• linux/slab.h
• linux/time.h
• crypto/internal/rng.h
• jitterentropy.h

Detected Declarations

• struct jitterentropy
• function jent_kvzfree
• function jent_zfree
• function jent_get_nstime
• function jent_hash_time
• function jent_read_random_block
• function jent_kcapi_cleanup
• function jent_kcapi_init
• function jent_kcapi_random
• function jent_kcapi_reset
• function jent_mod_init
• function jent_mod_exit
• module init jent_mod_init

Annotated Snippet

module_init(jent_mod_init);
module_exit(jent_mod_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
MODULE_DESCRIPTION("Non-physical True Random Number Generator based on CPU Jitter");
MODULE_ALIAS_CRYPTO("jitterentropy_rng");

Annotation

• Immediate include surface: `crypto/sha3.h`, `linux/fips.h`, `linux/kernel.h`, `linux/module.h`, `linux/mutex.h`, `linux/slab.h`, `linux/time.h`, `crypto/internal/rng.h`.
• Detected declarations: `struct jitterentropy`, `function jent_kvzfree`, `function jent_zfree`, `function jent_get_nstime`, `function jent_hash_time`, `function jent_read_random_block`, `function jent_kcapi_cleanup`, `function jent_kcapi_init`, `function jent_kcapi_random`, `function jent_kcapi_reset`.
• Atlas domain: Kernel Services / crypto.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.