ib_create_ucap(9)

✨ NAME ✨

okay bestie, welcome to ib_create_ucap(9) from the Kernel API Manual 💖 — she's here to Add a ucap character device. that's the whole name, no cap.

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🌸 SYNOPSIS 🌸

the entire vibe is literally this one function, copied exactly because we do not play with code:

int ib_create_ucap (enum rdma_user_cap type );

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🎀 ARGUMENTS 🎀

• type — the UCAP type. that's it, that's the argument, icon behavior only 🫶

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🦋 DESCRIPTION 🦋

so what does she do? she Creates a ucap character device in the /dev/infiniband directory. periodt. 💅

by default, the device has root-only read-write access. so yeah, the default vibe check is very much "root only, everyone else can chill outside" 🙈.

a driver may call this multiple times with the same UCAP type — yes, multiple times, same type, she said what she said ✨. a reference count tracks creations and deletions, keeping the receipts fr fr 🧾👑

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💜 RETURN 💜

• 0 on success 😌✨
• or a negative errno value on failure 😭💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/core/ucaps.c
• ib_ucaps_init(9)
• ib_remove_ucap(9)
• ib_get_ucaps(9)

like, go read those too, bestie, they're all linked in the lore 🦋📚

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mwah 💋 — source/version: ./drivers/infiniband/core, date: October 2026. Kernel API Manual, obviously. slay and goodbye 👑🎀