STRUCT RVT_UD_WR(9)

💅 struct rvt_ud_wr(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ — this one's a little struct with big main character energy, and honestly? it's giving "small but mighty." let's get into it 🫶

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🌸 NAME 🌸

struct rvt_ud_wr — the IB UD work request plus its AH cache, periodt 💖

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✨ SYNOPSIS ✨

struct rvt_ud_wr {
    struct ib_ud_wr wr;
    struct rdma_ah_attr *attr;
 };

like, that's the whole vibe. two fields. clean. iconic. no cap 🎀

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🦋 Members 🦋

• wr — a valid IB work request. literally the actual work, the moment, the main event 👑
• attr — a pointer to an allocated AH attribute. it's a pointer, she points, that's her job 💅

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🌈 Description 🌈

so basically this is the special-case version of the UD WR, and the whole reason it exists is so we can keep track of the AH attributes ✨ it's a dedicated lil home for them, and we're obsessed.

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💀 NOTE 💀

bestie. listen. this data structure is stricly ordered wr then attr. i.e. the attr MUST come after wr. 🚨

like, do not reorder them, do not pass go, do not collect $200 🙈 the ib_ud_wr is sized and copied in rvt_post_one_wr, and that copy assumes that wr is first. so the layout is not a suggestion, it's the law 💯

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🧚 SEE ALSO 🧚

Kernel file ./include/rdma/rdmavt_qp.h — and then the whole squad, fr fr:

• struct rvt_krwq(9)
• rvt_get_swqe_ah_attr(9)
• rvt_get_swqe_remote_qpn(9)
• rvt_get_swqe_remote_qkey(9)
• rvt_get_swqe_pkey_index(9)
• rvt_get_rq_count(9)
• struct rvt_operation_params(9)
• rvt_is_user_qp(9)
• rvt_get_qp(9)
• rvt_put_qp(9)
• rvt_put_swqe(9)
• rvt_qp_wqe_reserve(9)
• rvt_qp_wqe_unreserve(9)
• rvt_div_round_up_mtu(9)
• rvt_div_mtu(9)
• rvt_timeout_to_jiffies(9)
• rvt_lookup_qpn(9)
• rvt_mod_retry_timer_ext(9)
• rvt_put_qp_swqe(9)
• rvt_qp_swqe_incr(9)
• rvt_recv_cq(9)
• rvt_send_cq(9)
• rvt_qp_complete_swqe(9)
• struct rvt_qp_iter(9)
• ib_cq_tail(9)
• ib_cq_head(9)
• rvt_free_rq(9)
• rvt_to_iport(9)
• rvt_rc_credit_avail(9)

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and that's the whole page, bestie — no crumbs left behind 🍓

signing off from ./include/rdma, dated October 2026, on struct rvt_ud_wr(9) 🎀 slay, stay ordered, and keep wr first 💖✨