fix(ibverbs): prevent segfault when ibv_create_qp_ex fail to create qp

[dragonJACson]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces a helper function extended_qp_from_raw to centralize the conversion of raw queue pairs to extended queue pairs and refactors the QueuePairBuilder to use it. A review comment suggests simplifying the helper by removing an unnecessary null check on the result of ibv_qp_to_qp_ex, recommending the use of NonNull::new_unchecked with a safety comment instead.

[Copilot]

Pull request overview

Fixes a potential segfault path when ibv_create_qp_ex fails by ensuring null QP pointers are rejected before attempting ibv_qp_to_qp_ex conversion.

Changes:

• Added extended_qp_from_raw helper to validate/create NonNull<ibv_qp_ex> from the raw QP pointer.
• Updated QueuePairBuilder::build_ex to use the helper and early-return on failure.
• Added a unit test covering the null-QP rejection path.

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[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/ibverbs/queue_pair.rs	57.14%	6 Missing ⚠️

❌ Your patch check has failed because the patch coverage (57.14%) is below the target coverage (60.00%). You can increase the patch coverage or adjust the target coverage.

Files with missing lines	Coverage Δ
src/ibverbs/queue_pair.rs	70.41% <57.14%> (-0.19%)	⬇️

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

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