lun_from_dev(9)

💅 lun_from_dev(9) — Kernel API Manual 💅

okay so bestie, welcome to lun_from_dev(9) from the Kernel API Manual — it's a tiny little page but it does exactly one thing and it does it iconically. no cap.

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✨ NAME ✨

lun_from_dev — literally returns the lun of the scsi device. that's it. that's the whole gig. she's a one-job icon and she ate. 👑

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🌸 SYNOPSIS 🌸

u16 lun_from_dev (struct scsi_device *dev );

copy it exactly like that, mwah. 💋

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🎀 ARGUMENTS 🎀

• dev — a struct scsi_device. that's the whole description, bestie, the docs said "struct scsi_device" and honestly? valid. it's giving "the assignment was one sentence and I submitted one sentence." 🫶

lowkey a vibe check: the function hands you back a u16 (that's the return type up in the synopsis, iykyk), and the only thing it wants from you is that dev pointer. no hidden extras, no secret flags, fr fr.

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🦋 SEE ALSO 🦋

okay this is where it gets spicy 🌶️ — the original just dumps the entire ibmvscsi cast list on you, and we are NOT skipping a single one, because every name here is a main character:

• Kernel file ./drivers/scsi/ibmvscsi/ibmvscsi.c
• ibmvscsi_handle_event(9)
• ibmvscsi_release_crq_queue(9)
• crq_queue_next_crq(9)
• ibmvscsi_send_crq(9)
• ibmvscsi_task(9)
• ibmvscsi_reset_crq_queue(9)
• ibmvscsi_init_crq_queue(9)
• ibmvscsi_reenable_crq_queue(9)
• initialize_event_pool(9)
• release_event_pool(9)
• valid_event_struct(9)
• free_event_struct(9)
• get_event_struct(9)
• init_event_struct(9)
• unmap_cmd_data(9)
• map_sg_data(9)
• map_data_for_srp_cmd(9)
• purge_requests(9)
• ibmvscsi_set_request_limit(9)
• ibmvscsi_reset_host(9)
• ibmvscsi_timeout(9)
• ibmvscsi_send_srp_event(9)
• handle_cmd_rsp(9)
• ibmvscsi_queuecommand_lck(9)
• map_persist_bufs(9)
• unmap_persist_bufs(9)
• login_rsp(9)
• send_srp_login(9)
• capabilities_rsp(9)
• send_mad_capabilities(9)
• fast_fail_rsp(9)
• enable_fast_fail(9)
• adapter_info_rsp(9)
• send_mad_adapter_info(9)
• ibmvscsi_eh_host_reset_handler(9)
• ibmvscsi_handle_crq(9)
• ibmvscsi_sdev_configure(9)
• ibmvscsi_change_queue_depth(9)
• ibmvscsi_get_desired_dma(9)
• ibmvscsi_resume(9)

like… forty whole references. she said "here's my entire friend group, meet everyone." 💀 iconic behavior honestly.

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💖 sign-off 💖

and that's the page, bestie!! 🌈 this lil beauty lives in ./drivers/scsi/ibmvscsi, and the version/date stamp on it is October 2026 — so yeah, she's from the future, we don't ask questions. 🧚✨ go forth and get that lun. 💜