nvme_get_di...ceive_length(2)

💖 NAME 💖

nvme_get_directive_receive_length — bestie, this is the one that gets you the directive receive length ✨

okay so real quick, we're in the libnvme API manual, section 2, and this little cutie is a function that tells you how many bytes a directive's payload is gonna be. no cap. that's the whole vibe. 🫶

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✨ SYNOPSIS ✨

int nvme_get_directive_receive_length (enum nvme_directive_dtype dtype ,
enum nvme_directive_receive_doper doper , __u32 *len );

like... it takes three things and hands you back an int. that's it. that's the main character energy right there 👑

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🌸 ARGUMENTS 🌸

• dtype — the directive type, okay? go look at enum nvme_directive_dtype if you need the deets 🎀
• doper — the directive receive operation. yes, "doper," i know, don't laugh, it's literally in the source. check enum nvme_directive_receive_doper for the full list 💅
• len — on success, this gets set to this directive's payload length in bytes ✨ so you pass in a pointer and it fills your little __u32 with the number. obsessed.

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🌈 RETURN 🌈

returns 0 on success 💖

and if it does not recognize dtype or doper, it returns -1 with errno set to EINVAL 😭 (translation: you handed it something it didn't know what to do with, and it's telling you so).

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fr fr: if you're getting -1/EINVAL, the move is to double-check that your dtype and doper values are actually real members of those enums. it's giving "typo" energy. iykyk 💀

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that's the whole page, bestie — short, sweet, iconic 🌸🦋

mwah 💋 this was the libnvme API manual, July 2026 edition — go slay some NVMe, you got this 👑✨