nvme_init_resv_register(9)

💅 nvme_init_resv_register(9) — like, the libnvme API manual, bestie

okay so this is a page straight out of the libnvme API manual, and today's main character is nvme_init_resv_register ✨ she sets up your passthru command for a Reservation Register, no cap.

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🌸 NAME 🌸

nvme_init_resv_register — Initialize passthru command for Reservation Register 🎀

like literally that's her whole job. she initializes. she's a passthru-command-for-Reservation-Register initializer. iconic behavior.

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🦋 SYNOPSIS 🦋

void nvme_init_resv_register (struct libnvme_passthru_cmd *cmd , __u32
nsid , enum nvme_resv_rrega rrega , bool iekey , bool disnsrs , enum
nvme_resv_cptpl cptpl , __u64 crkey , __u64 nrkey , __le64 *payload );

she returns void, so like… no return value to obsess over 💀 she just does the thing and dips.

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💖 ARGUMENTS 💖

every single one of them, because we do not skip details in this group chat:

• cmd — the Passthru command to use. this is the buffer she's gonna fill in, so hand her a good one 🫶
• nsid — Namespace identifier. which namespace are we even talking about bestie, tell her.
• rrega — The registration action, see enum nvme_resv_rrega. this is the action, the whole plot of the episode.
• iekey — Set to ignore the existing key. 🙈 set it and the existing key gets no attention whatsoever.
• disnsrs — Disperse Namespace Reservation Support. yes that's the real name. yes it's a lot. say it with your chest.
• cptpl — Change persist through power loss, see enum nvme_resv_cptpl. very "what happens after the lights go out" of it all ⚡
• crkey — The current reservation key associated with the host. the before key.
• nrkey — The new reservation key to be register if action is register or replace. the after key ✨ (and yes, we're keeping "to be register" exactly as written — she said what she said 💅)
• payload — Data payload buffer to hold crkey and nrkey. both keys, one buffer, they're roommates 🏠

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🌈 DESCRIPTION 🌈

Initializes the passthru command buffer for the Reservation Register command. that's it, that's the vibe. she doesn't execute anything, she doesn't send anything — she just gets the command buffer all cute and ready so somebody else can go do the actual work. main character energy but make it support role 👑

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lowkey important: the only thing she does is initialize the passthru command buffer. don't be out here expecting her to run the command for you, she's not that girl 🙈

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and that's the page!! stay slay, stay keyed, and remember: reservation keys are a whole lifestyle 💜

— with love from the libnvme API manual, October 2026 edition, filed under nvme_init_resv_register 💅