NVME_GET_LOGICAL_BLOCK_SIZE(2)

✨ NAME ✨

nvme_get_logical_block_size — bestie, this is the one that gets you the block size 💖

It lives in the libnvme API manual, section 2, and honestly? it's giving tiny-but-mighty.

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🌸 SYNOPSIS 🌸

int nvme_get_logical_block_size (int fd , __u32 nsid , int *blksize );

Like. That's it. Three args. She's lowkey minimalist. 👑

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of your nvme device. Your little ✨portal✨ into the drive, fr fr.
• nsid — the namespace id. Which namespace are we asking about, bestie? Gotta be specific. 💅
• blksize — a pointer to where the block size gets set on success. She doesn't return it to you, she writes it into your pointer. Main character energy, honestly. 🫶

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💜 RETURN 💜

So here's the vibe check on what comes back:

• If a response was received, you get the nvme command status — peep enum nvme_status_field for the whole menu of possibilities.
• Otherwise you get -1 and errno is set. Not a slay. 😭

Not me needing to remind you: always check your return value, bestie. -1 without checking errno is a crime and I will be telling everyone. 💀

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🌈 SEE ALSO 🌈

Nothing extra listed here, bestie — just enum nvme_status_field, which got a whole shoutout up in RETURN. Go read it. It's iconic. ⭐

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Okay that's the whole page, no cap. This little beauty comes from the libnvme API manual, and the version we're looking at is dated July 2026. 🦋 Thanks for reading, mwah, go call nvme_get_logical_block_size and get your block size, queen. 🎀✨💖