rdma_move_ah_attr(9)

💅 rdma_move_ah_attr(9) — like, the Kernel API Manual, but make it make sense ✨

okay bestie, buckle up — this is rdma_move_ah_attr from the kernel API manual (section 9, the fancy "kernel internals" one 🎀). she's short, she's sweet, and honestly she's giving "tiny function, big consequences" energy. let's go 💖

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🌸 NAME 🌸

rdma_move_ah_attr — moves the ah_attr that source is pointing at over to destination. yes, that's it. that's the whole vibe. moving a thing from point A to point B, no cap 🫶

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✨ SYNOPSIS ✨

void rdma_move_ah_attr (struct rdma_ah_attr *dest , struct rdma_ah_attr
*src );

like, two pointers, zero return value. she's a void girlie and she's thriving 💅

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🦋 ARGUMENTS 🦋

• dest — pointer to the destination ah_attr, i.e. the place we're copying to. the docs are lowkey clear about this: dest is assumed to be valid or zero'd. so please, bestie, don't hand her uninitialised garbage 🙈
• src — pointer to the new ah_attr. the fresh one. the incoming main character 👑

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🔥 DESCRIPTION 🔥

okay so here's what actually happens, and this part is important so like, pay attention 💀

rdma_move_ah_attr first releases any reference in the destination ah_attr — but only if it is valid. so if dest was already holding onto something, she cleans up after herself before moving on. responsible queen behaviour, honestly 👑

then — and this is the iconic bit — it transfers ownership of the internal references from src to dest, which makes src invalid in the process. not "kinda stale", not "probably fine" — invalid. src is done, she's retired, she's not coming to the group chat anymore 😭

and just to be super clear: no new reference of the src ah_attr is taken. zero. none. it's a move, not a copy — the references literally pack up and change addresses. so if you were planning on using src afterwards, bestie... no you weren't. 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/core/verbs.c
• __ib_alloc_pd(9)
• ib_dealloc_pd_user(9)
• rdma_copy_ah_attr(9)
• rdma_replace_ah_attr(9)
• rdma_create_ah(9)
• rdma_create_user_ah(9)
• rdma_move_grh_sgid_attr(9)
• rdma_destroy_ah_attr(9)
• ib_create_srq_user(9)
• ib_create_qp_user(9)
• ib_resolve_eth_dmac(9)
• ib_modify_qp_with_udata(9)
• ib_alloc_mr(9)
• ib_alloc_mr_integrity(9)
• ib_alloc_xrcd_user(9)
• ib_dealloc_xrcd_user(9)
• ib_create_wq(9)
• ib_destroy_wq_user(9)
• ib_map_mr_sg_pi(9)
• ib_map_mr_sg(9)
• ib_sg_to_pages(9)
• ib_drain_sq(9)
• ib_drain_rq(9)
• ib_drain_qp(9)
• rdma_alloc_hw_stats_struct(9)
• rdma_free_hw_stats_struct(9)

that's the whole squad, all 26 of them, no gatekeeping 🧚💜

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⚠️ friendly reminder before you go: after this call, src is invalid. do not touch. do not pass go. she has left the building. 💀

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okay that's the page!! source dir is ./drivers/infiniband/core, dated October 2026, and the page itself is rdma_move_ah_attr(9) — mwah, love that for us 💖✨🎀 slay, stay hydrated, and always release your references bestie 🍓🦋