NVME_SET_FEATURES_RESV_MASK2(2)

✨ nvme_set_features_resv_mask2 ✨

okay bestie, listen up 💖 this one lives in the libnvme API manual, section 2, and it's called nvme_set_features_resv_mask2 — literally the Set reservation notification mask feature command, no cap. if ur messing with NVMe reservations and need to tell the controller which reservation-notification events u actually wanna hear about, this is ur girl 🎀

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🌸 SYNOPSIS 🌸

int nvme_set_features_resv_mask2 (int fd , __u32 nsid , __u32 mask ,
       bool save , __u32 *result );

that's the whole vibe check — five args, one int coming back at ya 🫶

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💅 ARGUMENTS 💅

• fd — File descriptor of nvme device ✨ ur lil handle to the drive itself, the main character of this whole operation.
• nsid — Namespace ID 🌈 which namespace we're talking to, bc a controller can have a whole squad of them.
• mask — Reservation Notification Mask Field 🎀 this is the actual payload, the bits that say which reservation notifications u want turned on. it's giving "choose ur notifications" energy.
• save — Save value across power states 💾 set it and it sticks even when the power dips — iconic persistence behavior.
• result — The command completion result from CQE dword0 👑 pointer to where the completion queue entry's dword0 lands. yep, the controller answers back and u catch it here.

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🔥 RETURN 🔥

so here's what u get back, fr fr:

• the nvme command status if a response was received (peep enum nvme_status_field for the full tea ☕), or
• -1 with errno set otherwise 😭

lowkey important: if u get that -1, do NOT just move on — check errno, bestie, that's where the actual story is 💀

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no SEE ALSO section, no extra lore, just the facts and the features. sometimes a girl is short and sweet 💜

that's it, that's the page — go set some features and slay ⭐🦋

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from the libnvme API manual, this page was compiled in July 2026 — mwah, take care of urself, and remember: always check ur return values 💖🧚