nbd_aio_is_processing(3)

✨ nbd_aio_is_processing 💅

okay so this is the nbd_aio_is_processing(3) page from the libnbd manual, and honestly it's a short one but it's lowkey iconic. it's a little vibe check for your NBD connection. let's get into it 🫶

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🌸 NAME 🌸

nbd_aio_is_processing — check if the connection is processing a command, bestie. that's it. that's the whole job. ✨

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🎀 SYNOPSIS 🎀

like, here's the whole thing you need:

#include <libnbd.h>

int nbd_aio_is_processing (
      struct nbd_handle *h
    );

one handle, one function, no drama. we love a minimal queen. 👑

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🦋 DESCRIPTION 🦋

so this function returns true if all of these are happening at once, no cap:

• the connection is connected to the NBD server 🔥
• the handshake has completed ✅
• the connection is processing commands — and the way that breaks down is it's either writing out a request or reading a reply 💫

and here's the important part, bestie, do not sleep on this: the ready state (nbd_aio_is_ready(3)) is not included. like, in the ready state commands may be in flight (the server is processing them, slay for the server), but libnbd is not processing them. different thing. iykyk. 🙈

so if you're sitting in ready state going "but the server is busy!!" — yeah babe that's not what this function is asking. read it again. 💀

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⭐ RETURN VALUE ⭐

this call returns a boolean value. cute, simple, true or false, no in-between. 🎀

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🌈 ERRORS 🌈

good news bestie: this function does not fail. literally cannot flop. 🫶

the one thing though: the following parameters must not be NULL: "h". that's your handle, you gotta actually have one. for more information see "Non-NULL parameters" in libnbd(3). 💖

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🧚 VERSION 🧚

this function first appeared in libnbd 1.0. vintage. iconic. 🍓

and if you need to test whether this function is available at compile time, check if the following macro is defined:

#define LIBNBD_HAVE_NBD_AIO_IS_PROCESSING 1

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💜 SEE ALSO 💜

go read these too, they're all part of the family:

• nbd_aio_is_ready(3)
• nbd_create(3)
• libnbd(3)

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🌸 AUTHORS 🌸

the legends who brought you this:

• Eric Blake
• Richard W.M. Jones

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👑 COPYRIGHT 👑

Copyright Red Hat

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💅 LICENSE 💅

okay, legal moment, but make it readable. here's the whole thing verbatim:

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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and that's the page, bestie! this lil gem is from the libnbd-1.25.8 manual, dated 2026-10-13. go forth and check your processing state responsibly 💖✨🎀