libnvme(9)

💅 libnvme(9) — like, the actual API manual, bestie

okay so real talk, this is the libnvme(9) manual page, and today's main character is enum nvme_id_iocs_iocsc — yes that's a mouthful, no I will not be pronouncing it out loud 💀

✨ NAME ✨

enum nvme_id_iocs_iocsc — bestie, this field literally indicates the Identify I/O Command Set Data Structure. that's it. that's the whole vibe. 🎀

🌸 SYNOPSIS 🌸

here's the whole thing in all its glory, copy it exactly, don't @ me:

enum nvme_id_iocs_iocsc {
    NVME_IOCS_IOCSC_NVMCS_SHIFT ,
    NVME_IOCS_IOCSC_NVMCS_MASK ,
    NVME_IOCS_IOCSC_KVCS_SHIFT ,
    NVME_IOCS_IOCSC_KVCS_MASK ,
    NVME_IOCS_IOCSC_ZNSCS_SHIFT ,
    NVME_IOCS_IOCSC_ZNSCS_MASK ,
    NVME_IOCS_IOCSC_SLMCS_SHIFT ,
    NVME_IOCS_IOCSC_SLMCS_MASK ,
    NVME_IOCS_IOCSC_CPNCS_SHIFT ,
    NVME_IOCS_IOCSC_CPNCS_MASK

};

🦋 Constants 🦋

okay so each command set gets itself a little SHIFT + MASK duo, like matching friendship bracelets except they're bitfields 🫶. the SHIFT tells you how far to slide, the MASK tells you what to grab. slay.

• NVME_IOCS_IOCSC_NVMCS_SHIFT — the shift amount so you can get the value of NVM Command Set 💖
• NVME_IOCS_IOCSC_NVMCS_MASK — the mask so you can get the value of NVM Command Set ✨
• NVME_IOCS_IOCSC_KVCS_SHIFT — shift amount, but make it Key Value Command Set 🎀
• NVME_IOCS_IOCSC_KVCS_MASK — mask, and yup, it's for the Key Value Command Set 🦋
• NVME_IOCS_IOCSC_ZNSCS_SHIFT — shift amount to get the value of Zoned Namespace Command Set, iconic honestly 🌸
• NVME_IOCS_IOCSC_ZNSCS_MASK — mask to get the value of Zoned Namespace Command Set 💅
• NVME_IOCS_IOCSC_SLMCS_SHIFT — shift amount to get the value of Subsystem Local Memory Command Set, say that five times fast 😭
• NVME_IOCS_IOCSC_SLMCS_MASK — mask to get the value of Subsystem Local Memory Command Set 🔥
• NVME_IOCS_IOCSC_CPNCS_SHIFT — shift amount to get the value of Computational Programs Namespace Command Set 👑
• NVME_IOCS_IOCSC_CPNCS_MASK — mask to get the value of Computational Programs Namespace Command Set ⭐

ngl bestie, they're all "shift to get the value" and "mask to get the value" — that's the entire lore. ten constants, five command sets, zero surprises. iykyk 💀

and that's the page!! no cap, that's genuinely everything 💜 this lil' writeup is from October 2026, it's the enum nvme_id_iocs_iocsc entry, and it lives in the libnvme(9) manual — go forth and mask your bits responsibly, mwah 🧚✨