libnvme(9)

💖 libnvme — bestie edition 💖

okay so this page is from the libnvme API manual (yes, the libnvme(9) one, section 9, we love a niche section number), and it's honestly so short it's basically a little snack. it's all about one enum. one! and the way that this enum is lowkey the key to reading a packed bitfield — obsessed. let's get into it 🫶

✨ NAME ✨

enum nvme_boot_partition_info — this field indicates the boot partition information. that's it, that's the whole vibe. it's giving "small but mighty" 💅

🌸 SYNOPSIS 🌸

enum nvme_boot_partition_info {
    NVME_BOOT_PARTITION_INFO_BPSZ_SHIFT ,
    NVME_BOOT_PARTITION_INFO_ABPID_SHIFT ,
    NVME_BOOT_PARTITION_INFO_BPSZ_MASK ,
    NVME_BOOT_PARTITION_INFO_ABPID_MASK

};

literally four constants. four. and every single one of them is about extracting info out of the struct nvme_boot_partition.bpinfo field. it's a shift-and-mask situation, iykyk 🦋

🎀 Constants 🎀

so here's the group chat roll call — all four of these are for pulling stuff out of the struct nvme_boot_partition.bpinfo field, no cap:

• NVME_BOOT_PARTITION_INFO_BPSZ_SHIFT — the shift amount you use to get the boot partition size out of the struct nvme_boot_partition.bpinfo field. shift it, slay it, done 💫
• NVME_BOOT_PARTITION_INFO_ABPID_SHIFT — the shift amount you use to get the active boot partition ID out of the struct nvme_boot_partition.bpinfo field. same field, different little guy 👑
• NVME_BOOT_PARTITION_INFO_BPSZ_MASK — the mask you use to get the boot partition size out of the struct nvme_boot_partition.bpinfo field. mask reveal moment, iconic ✨
• NVME_BOOT_PARTITION_INFO_ABPID_MASK — the mask you use to get the active boot partition ID out of the struct nvme_boot_partition.bpinfo field. matching set with the shift above, we love a coordinated outfit 💖

fr fr bestie, notice how all four of them are about that one bpinfo field. two shifts, two masks, two things being extracted (boot partition size + active boot partition ID). that's the whole entire page. no extra lore, no hidden options, not me checking twice 😭

and that's the tea ☕ — page originally dated October 2026, from the libnvme API Manual, section 9 (libnvme(9)). go forth and mask some bits, you absolute main character 🌈💜