STRUCT SLIB(9)

✨ struct slib — storage list information block (SLIB) ✨

Ok so bestie, we're deep in the Kernel API Manual territory today — like, <cyan>s390 architecture</cyan> deep — and the star of this page is struct slib, aka the storage list information block. Yeah. That's the acronym. SLIB. Say it with me: storage list information block 💅. It's a struct, it holds info, and it's lowkey the backbone of QDIO bookkeeping. Let's get into it.

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🌸 SYNOPSIS 🌸

struct slib {
    u64 nsliba;
    u64 sla;
    u64 slsba;
    struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
};

That's the whole vibe. Four members, one array, zero chill. ✨

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🎀 Members 🎀

• nsliba — the next SLIB address, if there even is one. It's giving linked-list energy — a pointer to the next block in the chain, or nothing if this is the last one. if any, bestie. If any. 😌
• sla — the SL address. Short, sweet, iconic. 🫶
• slsba — the SLSB address. One letter different from sla and yet completely different thing. Don't mix them up, I'm begging. 😭
• slibe — the SLIB elements. Plural, plural, plural — it's an array of struct slibe, sized QDIO_MAX_BUFFERS_PER_Q, and honestly? The main character of this struct. 👑

ngl, these member names are pure consonant soup, but that's s390 for you. Type them exactly, fr fr — nsliba, sla, slsba, slibe. No renaming, no "fixing", no vibes-based spelling. 💀

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🦋 SEE ALSO 🦋

Kernel file ./arch/s390/include/asm/qdio.h — go read it, it's the source of truth:

• struct qdesfmt0(9)
• struct qdr(9)
• struct qib(9)
• struct slibe(9)
• struct qaob(9)
• struct qdio_buffer_element(9)
• struct qdio_buffer(9)
• struct sl_element(9)
• struct sl(9)
• struct slsb(9)
• struct qdio_initialize(9)

Basically a whole friend group of structs and they all hang out in qdio.h. The way that list just keeps going — obsessed. 🧚 The friend group is real and you should absolutely click through every single one of these man pages. 🌈

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💖 friendly reminder: every single one of those references above is a real page you can pull up. Don't skip the struct slibe(9) one, it's literally the element type inside slibe here. iykyk.

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And that's the tea, bestie! ☕ This page came straight out of the ./arch/s390/include/asm corner of the kernel, stamped October 2026, and honestly it ate. Go forth and SLIB responsibly. 🍓💜