libnvme(9)

💖 NAME 💖

okay so bestie, this page is from the libnvme(9) API Manual, and it's giving iconic Zoned Namespace struct energy. The name-line vibe is struct nvme_zns_id_ctrl - I/O Command Set Specific Identify Controller Data Structure for the Zoned Namespace Command Set. no cap, that's the whole name and we're keeping it 💅.

✨ SYNOPSIS ✨

here's the struct, exactly as it lives — do not rearrange the vibes:

       struct nvme_zns_id_ctrl {
           __u8 zasl;
           __u8 rsvd1[3];
           __le32 zctratt;
           __le32 tar;
           __le32 uar;
           __le32 tor;
           __le32 uor;
           __le32 tzrwar;
           __le32 uzrwar;
           __le32 ver;
           __u8 rsvd36[4060];
        };

🎀 Members 🎀

okay so every member is a little main character, and here's the full lineup:

• zasl — Zone Append Size Limit. that's the label, periodt.
• rsvd1 — Reserved. hands off, bestie, it's reserved 🙈.
• zctratt — Zoned Controller Attributes, see enum nvme_zns_id_ctrl_zctratt for the deets. iykyk.
• tar — Total Active Resources. exactly what the label says, slay.
• uar — Unallocated Active Resources. noted, fr fr.
• tor — Total Open Resources. total open resources, iconic.
• uor — Unallocated Open Resources. unallocated open resources, periodt.
• tzrwar — Total ZRWA Resources. total ZRWA resources, no cap.
• uzrwar — Unallocated ZRWA Resources. unallocated ZRWA resources, literally.
• ver — Version, a Specification Version Descriptor, see NVME_MAJOR, NVME_MINOR, NVME_TERTIARY. check those three when you need the version deets.
• rsvd36 — Reserved. reserved again, bestie, don't touch 😭.

mwah 💋 — source/version: struct nvme_zns_id_ctrl, manual: libnvme(9) API Manual, date: October 2026. byeee 🫶