nbd_get_handshake_flags(3)

okay so this is the nbd_get_handshake_flags(3) page from the libnbd manual, and we’re gonna make it make sense bestie 💖

💖 NAME 💖

nbd_get_handshake_flags — see which handshake flags are supported 🎀

✨ SYNOPSIS ✨

        #include <libnbd.h>

        uint32_t nbd_get_handshake_flags (
                   struct nbd_handle *h
                 );

🦋 DESCRIPTION 🦋

Bestie, this one returns the state of the handshake flags on this handle. 💅

When the handle has not yet completed a connection (see nbd_aio_is_created(3)), this returns the flags that the client is willing to use, provided the server also advertises those flags. Like, “these are the flags I’m down for if you’re also down for them” energy. 🫶

After the connection is ready (see nbd_aio_is_ready(3)), this returns the flags that were actually agreed on between the server and client. Periodt — it’s the real finalized handshake situation. ✨

If the NBD protocol defines new handshake flags, then the return value from a newer library version may include bits that were undefined at the time of compilation. So yeah, newer library, possible new bits — not sketchy, just version tea. 🍓

🌸 RETURN VALUE 🌸

This call returns a bitmask of LIBNBD_HANDSHAKE_FLAG_* values. Iconic bitmask behavior, no cap. 👑

🎀 ERRORS 🎀

This function does not fail. Literally not me worrying about an error return here. 💀

The following parameters must not be NULL: "h". For more information see "Non-NULL parameters" in libnbd(3). 🫶

💅 VERSION 💅

This function first appeared in libnbd 1.2. 🌈

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

        #define LIBNBD_HAVE_NBD_GET_HANDSHAKE_FLAGS 1

🫶 SEE ALSO 🫶

• nbd_aio_is_created(3)
• nbd_aio_is_ready(3)
• nbd_create(3)
• nbd_get_protocol(3)
• nbd_set_handshake_flags(3)
• nbd_set_strict_mode(3)
• libnbd(3)

👑 AUTHORS 👑

• Eric Blake
• Richard W.M. Jones

🌈 COPYRIGHT 🌈

Copyright Red Hat

⭐ LICENSE ⭐

okay legal bestie moment, here’s the exact license text 🎀

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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This page is from the libnbd source, version libnbd-1.25.8, dated 2026-10-13 — it’s literally the nbd_get_handshake_flags(3) manual page, slay 💖✨