libnvme(2)

✨ NAME ✨

enum nvme_fdp_config_fdpa — FDP Attributes, bestie 💖

Like, this is the enum that holds all the FDP (Flexible Data Placement) attribute fields for a configuration, broken out into shift and mask constants. It's giving "bitfield bookkeeping, but make it cute" 🎀

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🦋 SYNOPSIS 🦋

enum nvme_fdp_config_fdpa {
    NVME_FDP_CONFIG_FDPA_RGIF_SHIFT ,
    NVME_FDP_CONFIG_FDPA_RGIF_MASK ,
    NVME_FDP_CONFIG_FDPA_FDPVWC_SHIFT ,
    NVME_FDP_CONFIG_FDPA_FDPVWC_MASK ,
    NVME_FDP_CONFIG_FDPA_VALID_SHIFT ,
    NVME_FDP_CONFIG_FDPA_VALID_MASK

};

okay so picture it: six constants, three little fields, each one with a SHIFT and a MASK. That's the whole squad, no cap 👑

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🌸 Constants 🌸

Every single member, right here, nothing skipped, periodt 💅

• NVME_FDP_CONFIG_FDPA_RGIF_SHIFT — Reclaim Group Identifier Format Shift 🌀 you use this one to slide the reclaim group identifier format field into its spot.
• NVME_FDP_CONFIG_FDPA_RGIF_MASK — Reclaim Group Identifier Format Mask 🌈 this is the one that keeps just those bits and shuts out the rest.
• NVME_FDP_CONFIG_FDPA_FDPVWC_SHIFT — FDP Volatile Write Cache Shift ⚡ the shift for the volatile write cache field, mwah.
• NVME_FDP_CONFIG_FDPA_FDPVWC_MASK — FDP Volatile Write Cache Mask 🫧 mask for that same volatile write cache field, so only its bits survive.
• NVME_FDP_CONFIG_FDPA_VALID_SHIFT — FDP Configuration Valid Shift ✅ the shift that places the "is this config even valid" field.
• NVME_FDP_CONFIG_FDPA_VALID_MASK — FDP Configuration Valid Mask 👑 and the mask that isolates it. Iconic.

ngl bestie, if you're mixing shifts and masks from different fields, that's a you problem and it will not slay. Keep each SHIFT with its own MASK 💀

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🫶 SEE ALSO 🫶

(nothing listed in the original — so it's just you, me, and these six constants, fr fr 🦋)

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and that's the whole page! this one came from the libnvme API manual, page dated July 2026, titled enum nvme_fdp_config_fdpa, filed under section libnvme(2) 🌟 go forth and mask your bits correctly, ily 💜