libnvme(2)

✨ NAME ✨

struct nvme_zns_id_ns — the Zoned Namespace Command Set Specific Identify Namespace Data Structure, bestie 💖

Like, this is the whole vibe of a zoned namespace when you ask it to identify itself. It's in libnvme, manual section 2, and yes she is iconic.

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🦋 SYNOPSIS 🦋

struct nvme_zns_id_ns {
    __le16 zoc;
    __le16 ozcs;
    __le32 mar;
    __le32 mor;
    __le32 rrl;
    __le32 frl;
    __le32 rrl1;
    __le32 rrl2;
    __le32 rrl3;
    __le32 frl1;
    __le32 frl2;
    __le32 frl3;
    __le32 numzrwa;
    __le16 zrwafg;
    __le16 zrwasz;
    __u8 zrwacap;
    __u8 rsvd53[2763];
    struct nvme_zns_lbafe   lbafe[64];
    __u8 vs[256];
 };

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💅 Members 💅

okay so every field, no skips, no gatekeeping 🫶

• zoc — Zone Operation Characteristics
• ozcs — Optional Zoned Command Support
• mar — Maximum Active Resources
• mor — Maximum Open Resources
• rrl — Reset Recommended Limit
• frl — Finish Recommended Limit
• rrl1 — Reset Recommended Limit 1
• rrl2 — Reset Recommended Limit 2
• rrl3 — Reset Recommended Limit 3
• frl1 — Finish Recommended Limit 1
• frl2 — Finish Recommended Limit 2
• frl3 — Finish Recommended Limit 3
• numzrwa — Number of ZRWA Resources
• zrwafg — ZRWA Flush Granularity
• zrwasz — ZRWA Size
• zrwacap — ZRWA Capability
• rsvd53 — Reserved 🙈 (she's just sitting there, minding her business, don't touch)
• lbafe — LBA Format Extension, and it's an array: lbafe[64] 🎀
• vs — Vendor Specific, also an array: vs[256] ✨

lowkey reminder: rsvd53 is literally declared as __u8 rsvd53[2763]; and it's Reserved, so hands off, babe 💀

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and that's the whole struct, ate and left no crumbs 👑

sign-off time 💖 this lil cutie lives in the libnvme API manual, page struct nvme_zns_id_ns, section libnvme(2), dated July 2026 🌸 k byeeee 🦋