STRUCT ZFCP_DBF_SCSI(9)

💅 struct zfcp_dbf_scsi(9) — like, the Kernel API Manual, bestie 🎀

okay so picture this: it's a page from the Kernel API Manual, and it's all about struct zfcp_dbf_scsi — the shared trace record for SCSI records. yes, THE one. she's the blueprint for how SCSI tracing gets written down, and honestly? iconic. ✨

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🌸 NAME 🌸

struct zfcp_dbf_scsi — the common trace record for SCSI records, fr fr. not a vibe, a structure. 💖

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🦋 SYNOPSIS 🦋

here's the whole glow-up, laid out exactly as she comes:

struct zfcp_dbf_scsi {
    u8 id;
    char tag[ZFCP_DBF_TAG_LEN];
    u32 scsi_id;
    u32 scsi_lun;
    u32 scsi_result;
    u8 scsi_retries;
    u8 scsi_allowed;
    u8 fcp_rsp_info;
  #define ZFCP_DBF_SCSI_OPCODE    16;
    u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
    u64 fsf_req_id;
    u64 host_scribble;
    u16 pl_len;
    struct fcp_resp_with_ext fcp_rsp;
    u32 scsi_lun_64_hi;
 };

and yes, that #define ZFCP_DBF_SCSI_OPCODE 16; really does live inside the struct like that, semicolon and all. not me judging, she's just quirky like that 🙈

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👑 Members 👑

okay bestie, field-by-field tour, let's go:

• id — the unique number of the recovery record type. her little ID card, basically 💅
• tag — an identifier string specifying the location of initiation. like a "you are here" sticker but for tracing 🎀
• scsi_id — the scsi device id
• scsi_lun — the scsi device logical unit number, low part of 64 bit, old 32 bit. yes she's the low half, she's the vintage half 🧚
• scsi_result — the scsi result
• scsi_retries — the current retry number of the scsi request. we've all been there, keep trying queen 😭
• scsi_allowed — the allowed retries. aka the limit, the boundary, the ceiling
• fcp_rsp_info — the FCP response info code
• scsi_opcode — the scsi opcode
• fsf_req_id — the request id of the fsf request
• host_scribble — LLD specific data attached to the SCSI request. the name?? unhinged. the job?? essential 🖍️
• pl_len — the length of the payload stored as zfcp_dbf_pay
• fcp_rsp — the response for the FCP request
• scsi_lun_64_hi — the scsi device logical unit number, high part of 64 bit. the other half of the 64-bit duo, reunited at last 🫶

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⭐ SEE ALSO ⭐

first up, the source of truth itself: Kernel file ./drivers/s390/scsi/zfcp_dbf.h struct. go read it, iykyk 💜

and then the whole extended friend group, no one left out:

• zfcp_dbf_rec_trigger(9)
• struct zfcp_dbf_rec_running(9)
• enum zfcp_dbf_rec_id(9)
• struct zfcp_dbf_rec(9)
• enum zfcp_dbf_san_id(9)
• struct zfcp_dbf_hba_res(9)
• struct zfcp_dbf_hba_uss(9)
• struct zfcp_dbf_hba_uas(9)
• struct zfcp_dbf_hba_fces(9)
• enum zfcp_dbf_hba_id(9)
• struct zfcp_dbf_hba(9)
• enum zfcp_dbf_scsi_id(9)
• struct zfcp_dbf_pay(9)
• struct zfcp_dbf(9)
• zfcp_dbf_hba_fsf_resp_suppress(9)
• zfcp_dbf_hba_fsf_response(9)
• zfcp_dbf_scsi_result(9)
• zfcp_dbf_scsi_fail_send(9)
• zfcp_dbf_scsi_abort(9)
• zfcp_dbf_scsi_devreset(9)
• zfcp_dbf_scsi_nullcmnd(9)

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ngl this page lowkey ate. go forth and trace those SCSI records, bestie, you've got this 💖✨

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and that's the whole page, mwah 💋 — brought to you from ./drivers/s390/scsi, dated October 2026, filed under struct zfcp_dbf_scsi(9). slay, periodt. 🌈👑