STRUCT SRPT_SEND_IOCTX(9)

💅 struct srpt_send_ioctx(9) — the SRPT send I/O context, explained

okay so real talk, bestie — this page is from the Kernel API Manual, and it's about struct srpt_send_ioctx, aka the SRPT send I/O context. It's giving "one struct to rule a send" energy, and we're gonna go through every single member together, no skipping, periodt. 🎀

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✨ SYNOPSIS ✨

struct srpt_send_ioctx {
    struct srpt_ioctx       ioctx;
    struct srpt_rdma_ch     *ch;
    struct srpt_recv_ioctx  *recv_ioctx;
    struct srpt_rw_ctx      s_rw_ctx;
    struct srpt_rw_ctx      *rw_ctxs;
    struct scatterlist      imm_sg;
    struct ib_cqe           rdma_cqe;
    enum srpt_command_state state;
    struct se_cmd           cmd;
    u8 n_rdma;
    u8 n_rw_ctx;
    bool queue_status_only;
    u8 sense_data[TRANSPORT_SENSE_BUFFER];
 };

like, look at her. iconic. 💖

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🌸 Members 🌸

so these are all the fields, and yes we're doing all of them, don't scroll:

• ioctx — literally "see above." that's it. that's the whole description. (the manpage said it, not me, don't come for me 😭)
• ch — the channel pointer. your girl's ride-or-die link to her channel. 🦋
• recv_ioctx — the receive I/O context that's associated with this here send I/O context. careful though: it's only used for processing immediate data. iykyk.
• s_rw_ctx — this is the little spot where rw_ctxs points if only a single rw_ctx is needed. lowkey efficient. ✨
• rw_ctxs — the RDMA read/write contexts. plural. she contains multitudes.
• imm_sg — the scatterlist for immediate data. gathering them bytes.
• rdma_cqe — the RDMA completion queue element. the "we're so back" notification. 🔥
• state — the I/O context state. main character's current mood.
• cmd — the target core command data structure. the actual business.
• n_rdma — number of work requests needed to transfer this ioctx. count 'em.
• n_rw_ctx — the size of the rw_ctxs array. (different from n_rdma, bestie, don't mix them up 💀)
• queue_status_only — when this is set, you send a SCSI status back to the initiator but no data. status only. no thoughts, no head, no data.
• sense_data — the sense data to be sent to the initiator. it's a u8 sense_data[TRANSPORT_SENSE_BUFFER] situation, very demure.

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🫶 SEE ALSO 🫶

if you're the kind of girl who reads the whole wiki, here's the reading list — plus the kernel file they all live in, ./drivers/infiniband/ulp/srpt/ib_srpt.h:

• enum srpt_command_state(9)
• struct srpt_ioctx(9)
• struct srpt_recv_ioctx(9)
• enum rdma_ch_state(9)
• struct srpt_rdma_ch(9)
• struct srpt_nexus(9)
• struct srpt_port_attrib(9)
• struct srpt_tpg(9)
• struct srpt_port_id(9)
• struct srpt_port(9)
• struct srpt_device(9)

go read them. i'll wait. 💅

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and that's the whole send I/O context, no cap. every field, every pointer, every u8, accounted for. slay. 🌈

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alright bestie, that's the page! 🧚 this one came from ./drivers/infiniband/ulp/srpt, dated October 2026, and it's filed under struct srpt_send_ioctx(9) in the Kernel API Manual. mwah 💜