Add support for unseeded integer hashing in hash-table

[Alan-Jowett]

Description

This pull request introduces changes to the eBPF runtime to add support for unseeded integer hashing in hash tables. The most important changes include adding new hash functions for integer keys, updating the hash table creation options, and modifying the hash table's bucket index computation to use the new hash functions.

Enhancements to Hash Table Functionality:

• libs/runtime/ebpf_hash_table.c: Added new functions _ebpf_integer_hash_function_32bit and _ebpf_integer_hash_function_64bit for hashing 32-bit and 64-bit integer keys, respectively. Updated _ebpf_hash_table_compute_bucket_index to use these functions when use_integer_hashing is enabled. [1] [2]

• libs/runtime/ebpf_hash_table.c: Added a new field use_integer_hashing to the struct _ebpf_hash_table to indicate whether integer hashing should be used.

• libs/runtime/ebpf_hash_table.c: Modified ebpf_hash_table_create to initialize the use_integer_hashing field based on the creation options.

Updates to Hash Table Creation Options:

• libs/runtime/ebpf_hash_table.h: Added a new field use_unseeded_integer_hashing to ebpf_hash_table_creation_options_t to specify whether unseeded integer hashing should be used for the hash table.

Application of New Hashing Option:

• libs/runtime/ebpf_async.c: Enabled use_unseeded_integer_hashing in the ebpf_async_initiate function.
• libs/runtime/ebpf_object.c: Enabled use_unseeded_integer_hashing in the ebpf_object_tracking_initiate function.
• libs/runtime/ebpf_state.c: Enabled use_unseeded_integer_hashing in the ebpf_state_initiate function.

Testing

CI/CD

Documentation

No.

Installation

No.