nvme_init_io(9)

📦 version 3.2, in arch rolling

💅 nvme_init_io(9) — the libnvme API manual, bestie edition 🎀

okay so this is nvme_init_io, straight out of the libnvme API manual, and it's literally the glow-up your passthru command needs before it goes out. ✨

🌸 NAME 🌸

nvme_init_io — Initialize passthru command for a generic user I/O command

like, it sets up your passthru command so you can fire off a generic user I/O command. that's the whole vibe. 💖

🦋 SYNOPSIS 🦋

void nvme_init_io (struct libnvme_passthru_cmd *cmd , __u8 opcode ,
__u32 nsid , __u64 slba , void *data , __u32 data_len , void *metadata ,
__u32 metadata_len );

no cap, that's the signature. copy it exactly, don't get cute with it. 🫶

✨ ARGUMENTS ✨

  • cmd — the Passthru command to use. this is the main character, the one getting initialized 💅
  • opcode — the Opcode to execute. what are we even doing here, y'know?
  • nsid — the Namespace ID. which namespace bestie, be specific 🎀
  • slba — the Starting logical block. where the party starts 🎉
  • data — Pointer to user address of the data buffer 👑
  • data_len — Length of user buffer, data, in bytes. yes, in bytes, always in bytes 📏
  • metadata — Pointer to user address of the metadata buffer 🦋
  • metadata_len — Length of user buffer, metadata, in bytes 🌸

💜 DESCRIPTION 💜

It initializes the passthru command buffer for a generic NVM I/O command. that's it, that's the job — it's giving setup-wizard energy, lowkey essential. 🔥

⚠️ NOTE ⚠️

If elbas is true, the caller must ensure the definition/logic for nvme_init_set_var_size_tags is available and that the return value from that function is checked for error.

fr fr, do not sleep on this one bestie — if elbas is true you gotta have that nvme_init_set_var_size_tags definition/logic available and actually check its return value for errors. no vibes-based error handling. 😭💀

and that's the page! 🧚 this little beauty is from the libnvme API manual, dated October 2026, page nvme_init_io, section nvme_init_io(9). periodt. 💅⭐🌈

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