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Deprecation

ABI and API Deprecation {#deprecation}

This document details the policy for maintaining stability of SPDK ABI and API.

Major ABI version can change at most once for each quarterly SPDK release. ABI versions are managed separately for each library and follow Semantic Versioning.

API and ABI deprecation notices shall be posted in the next section. Each entry must describe what will be removed and can suggest the future use or alternative. Specific future SPDK release for the removal must be provided. ABI cannot be removed without providing deprecation notice for at least single SPDK release.

Deprecated code paths must be registered with SPDK_DEPRECATION_REGISTER() and logged with SPDK_LOG_DEPRECATED(). The tag used with these macros will appear in the SPDK log at the warn level when SPDK_LOG_DEPRECATED() is called, subject to rate limits. The tags can be matched with the level 4 headers below.

Deprecation Notices {#deprecation-notices}

nvme

`nvme_ctrlr_prepare_for_reset``

Deprecated spdk_nvme_ctrlr_prepare_for_reset API, which will be removed in SPDK 22.01. For PCIe transport, spdk_nvme_ctrlr_disconnect should be used before freeing I/O qpairs.