STRUCT SCMD_PRIV(9)

💅 struct scmd_priv(9) — the kernel API manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual and it's literally all about struct scmd_priv, aka the SCSI command private data. she's a little struct with main character energy and i'm obsessed ✨

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🌸 NAME 🌸

struct scmd_priv — SCSI command private data 🫶

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✨ SYNOPSIS ✨

here's the whole vibe, copied exactly, no cap:

struct scmd_priv {
    u16 host_tag;
    u8 in_lld_scope;
    u8 meta_sg_valid;
    struct scsi_cmnd *scmd;
    u16 req_q_idx;
    int chain_idx;
    int meta_chain_idx;
    u8 mpi3mr_scsiio_req[MPI3MR_ADMIN_REQ_FRAME_SZ];
};

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🦋 Members 🦋

breaking down every single field because we do not skip details in this house 💅

• host_tag — the host tag, and it's specific to the operational queue 👑
• in_lld_scope — tells you whether the command is in LLD scope or not, iykyk
• meta_sg_valid — flags a DIX command with meta data SGL, or not 🙈
• scmd — the SCSI Command pointer, literally
• req_q_idx — the operational request queue index 🎀
• chain_idx — the chain frame index
• meta_chain_idx — the chain frame index of meta data SGL 🌈
• mpi3mr_scsiio_req — the MPI SCSI IO request, size MPI3MR_ADMIN_REQ_FRAME_SZ and all 💖

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👑 SEE ALSO 👑

the kernel file ./drivers/scsi/mpi3mr/mpi3mr.h and honestly the whole friend group 💀 — here's everyone, no one left out:

• struct mpi3mr_nvme_pt_sge(9)
• struct mpi3mr_buf_map(9)
• struct mpi3mr_compimg_ver(9)
• struct segments(9)
• struct op_req_qinfo(9)
• struct op_reply_qinfo(9)
• struct mpi3mr_intr_info(9)
• struct mpi3mr_throttle_group_info(9)
• struct mpi3mr_hba_port(9)
• struct mpi3mr_sas_port(9)
• struct mpi3mr_sas_phy(9)
• struct mpi3mr_sas_node(9)
• struct mpi3mr_enclosure_node(9)
• struct tgt_dev_sas_sata(9)
• struct tgt_dev_pcie(9)
• struct tgt_dev_vd(9)
• union _form_spec_inf(9)
• struct mpi3mr_tgt_dev(9)
• mpi3mr_tgtdev_get(9)
• mpi3mr_free_tgtdev(9)
• mpi3mr_tgtdev_put(9)
• struct mpi3mr_stgt_priv_data(9)
• struct mpi3mr_drv_cmd(9)
• union mpi3mr_trigger_data(9)
• struct trigger_event_data(9)
• struct diag_buffer_desc(9)
• struct dma_memory_desc(9)
• struct chain_element(9)
• struct mpi3mr_ioc(9)
• struct mpi3mr_fwevt(9)
• struct delayed_dev_rmhs_node(9)
• struct delayed_evt_ack_node(9)

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ngl bestie, that's the whole page — every field, every flag, every reference, all accounted for 💜

and that's a wrap! this one came to you from ./drivers/scsi/mpi3mr and it's dated October 2026 — so go forth, read your structs, and slay 🧚💖⭐