PROBE::SCSI.IOENTR(3stap)

💖 probe::scsi.ioentry — the SCSI mid-layer glow-up 💖

okay bestie, you found a page from the SCSI Tapset, manual section 3stap, and it's literally all about probe::scsi.ioentry — the probe that prepares a SCSI mid-layer request. slay. let's get into it 🎀

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✨ SYNOPSIS ✨

probe scsi.ioentry {}

that's it. that's the whole thing. no args, no drama, just vibes 🦋

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🌸 VALUES 🌸

these are the little goodies you can peek at inside the probe. the way that each one just exists for you… obsessed 💅

• device_state — the current state of the device. that's the state. right now. present tense, main character energy ✨
• disk_major — the major number of the disk, and if there's no info? it's -1. noted. no cap 🫶
• device_state_str — same current state of the device as above, but as a string this time. one state, two outfits, we love range 💖
• req_addr — the current struct request pointer, but handed to you as a number. that's it. that's the address 🔥
• disk_minor — the minor number of the disk, and again, -1 if there's no information. consistency queen 👑

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🌈 DESCRIPTION 🌈

okay so this is the part that's actually kind of iconic. the probe keeps every historical prep hook as its own optional alias — like a group chat where nobody ever leaves — so that RHEL8-era 4.18 still matches, while newer kernels get to use the blk-mq names. everyone's invited. periodt 💀

here's the whole roster:

• scsi_prep_fn / sd_prep_fn / sr_prep_fn — these are the request_fn / blk_queue_prep_rq era, hanging out in v4.18/4.19, and then gone by v5.0. rip bestie 😭
• scsi_mq_prep_fn — the early blk-mq prep name, riding from v4.18 through around 6.x ✨
• scsi_prepare_cmd — the current name, and it's literally the glow-up: renamed from scsi_mq_prep_fn. rebrand of the century 👑

so yeah — the probe covers all of them, because compatibility is a love language 🫶

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🦋 SEE ALSO 🦋

• tapset::scsi(3stap)

go read that one next, iykyk 💜

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and that's the whole page, fr fr 🌸 this was the SystemTap Tapset Reference, version from September 2026 — mwah, take care of yourself, hydrate, and go probe something cute 💖✨🎀