|tag name||v126.96.36.199 (3119269aae4a904a235f95748ccc5a74344111c8)|
|tag date||2017-01-19 16:44:47 +0300|
|tagged by||Maxim Uvarov <firstname.lastname@example.org>|
|tagged object||commit 3875d6ebf6...|
== OpenDataPlane (188.8.131.52)
=== New Features ==== APIs ODP v184.108.40.206 represents the initial preview of the Tiger Moth release series and as such introduces new APIs and extensions that will be built on as this release matures. ===== Crypto Parameter Normalization Many ODP APIs take parameter structs of type `odp_xxx_param_t`. The crypto APIs, for historical reasons, failed to follow this convention, using instead structs of type `odp_crypto_params_t`, etc. These pluralized names are now deprecated and their singular forms are introduced as the preferred names for these structs. The old names are retained (for now) to ease migration, however applications should convert to the new forms at their convenience as these deprecated forms will be removed in the final Tiger Moth release. The changes introduced for this include: * `odp_crypto_op_params_t` => `odp_crypto_op_param_t` * `odp_crypto_session_params_t` => `odp_crypto_session_param_t` ===== Crypto Decouple Key Length from Algorithm Specification To provide a more flexible programming for handling all possible key/digest/iv length combinations, the enums used for crypto specification are split to decouple lengths from algorithm names. The only exception is the SHA-2 family of hash routines, which have well-established naming conventions that incorporate digest lengths (SHA-224, SHA-256, etc.) Changes included with this restructure include: * The `odp_crypto_capability_t` structure returned by the `odp_crypto_capability()` API contains streamlined `odp_crypto_cipher_algos_t` and `odp_crypto_auth_algos_t` substructures. * A new `odp_crypto_cipher_capability()` API is added to return detailed information about available cipher capabilities. * A new `odp_crypto_auth_capability()` API is added to return detailed information about available authentication capabilities. ===== `odp_crypto_session_param_init()` API For completeness the `odp_crypto_session_param_init()` API is provided to enable platform-independent initialization of the `odp_crypto_session_param_t` structure used as input to `odp_crypto_session_create()`. ===== Bitfield and Byteorder Cleanup The `ODP_BITFIELD_ORDER` define is added to the ODP specification to parallel the existing `ODP_BYTEFIELD_ORDER` define. This will be set to the value `ODP_BIG_ENDIAN_BITFIELD` or `ODP_LITTLE_ENDIAN_BITFIELD`. This also addresses https://bugs.linaro.org/show_bug.cgi?id=2402[Bug 2402], however since fixing this required a small API change this was deferred until an API release boundary. ===== Improved Name Argument Definitions in `odp_xxx_create()` Functions The use of name arguments to the various resource creation APIs has been standardized and documentation improved to clarify that unique names are not required and that these may be specified as NULL for anonymous resource creation. When non-unique resource names are used, it is unspecified which of these are returned by a corresponding lookup API. ===== Pool Parameters for Packet Pools The `odp_pool_param_t` structure adds the new field `max_len` to be used in packet pools to advise the implementation of the maximum sized packet that the application will allocate with a single `odp_packet_alloc()` call. This may enable storage pool optimization. ===== Packet Clarifications API documentation for `odp_packet_concat()` and `odp_packet_copy_from_pkt()` is clarified to specify that the source and destination packets supplied to these APIs should not refer to the same packet. ===== Packet Allocation Length Clarification API documentation for `odp_packet_alloc()` is clarified to specify that the supplied length for requested packet allocation should be greater than zero. ===== Random API Changes The APIs provided for working with random data have been revised. The third parameter to `odp_random_data()` is now of type `odp_random_kind_t`, which is an `enum` that is used to specify the quality of random data required. The kinds of random data defined are: `ODP_RANDOM_BASIC`:: No specific quality guarantees. This is assumed to be pseudo-random data generated by software where speed of generation is more important than the quality of the results.This is the lowest kind of random. `ODP_RANDOM_CRYPTO`:: Random data suitable for use in cryptographic operations. `ODP_RANDOM_TRUE`:: True random data generated from a hardware entropy source. This is the highest kind of random. The `odp_random_max_kind()` API is provided that returns the highest kind of data available on this implementation. Requests for higher kinds than can be supplied will fail. For testing purposes it is often desirable to generate "random" sequences that are repeatable. To support this use case, the `odp_random_test_data()` API is introduced. This always returns BASIC random data but uses a user-supplied 64-byte seed parameter that is update for each call and can be used to repeat the same sequence as needed. ===== Shared Memory Improvements The `odp_shm_reserve()` API adds two new additional flags to support external memory. * `ODP_SHM_SINGLE_VA` guarantees that all ODP threads sharing this memory will see the block at the same virtual address regardless of whether threads are implemented as pthreads or processes and when `fork()` calls are made to create them. * `ODP_SHM_EXPORT` allows the memory block to be visible to other ODP instances. Other ODP instances can retrieve this block via the new `odp_shm_import()` API. ===== Classification Clarifications The relationship between classification and queue configuration in the `odp_pktin_queue_param_t` structure is clarified to emphasize that classification subsumes queue-based I/O processing. This is an API documentation change only. === Helpers New helper APIs are introduced for IP table lookup support for longest prefix matching as well as cuckoo hash tables. These are designed to provide analogs to functions available in DPDK to assist applications being ported to ODP. === Performance Improvements The odp-linux reference implementation includes a number of improvements to make it more suitable for production use on platforms that rely on software implementations of key ODP APIs. ==== Ring-based Pool Implementation Storage pools used for buffers and packets are now implemented via lockless ring structures that support burst mode read/writes to local caches for significantly improved multi-core scalability ==== Buffer/Packet Header Optimizations The layout of the structs used to support buffers and packets has been optimized to reduce cache footprint and minimize path lengths in packet manipulation. ==== Ordered Queue Improvements The implementation of ordered queues has been streamlined and made more scaleable in multi-core systems. ==== Packet Segmentation Improvements The more advance segmentation capabilities present in the new ODP packet implementation are used to streamline the implementation of APIs like `odp_packet_concat()` and the head/tail extend/trunc APIs. === Bug Fixes ==== https://bugs.linaro.org/show_bug.cgi?id=2405[Bug 2405] A number of "todos" were removed from the packet validation test suite. ==== https://bugs.linaro.org/show_bug.cgi?id=2472[Bug 2472] The CPU affinity is now correctly read from the cpuset. ==== https://bugs.linaro.org/show_bug.cgi?id=2496[Bug 2496] The PktIO validation test no longer uses invalid MAC addresses. ==== https://bugs.linaro.org/show_bug.cgi?id=2512[Bug 2512] The TCP checksum is now properly calculated for generated packets. ==== https://bugs.linaro.org/show_bug.cgi?id=2798[Bug 2798] The odp-linux reference implementation makes use of the OpenSSL library to support the `odp_random_xxx()` APIs and some crypto operations. To support OpenSSL versions prior to 1.1.0, which are not thread safe, support is added for OpenSSL locking callbacks that use ODP ticketlocks to provide OpenSSL thread safety. === Known Issues ==== https://bugs.linaro.org/show_bug.cgi?id=2812[Bug 2812] Make check fails on a single core VM in the process mode helper test.