mesh_queue_preq(9)

💫 mesh_queue_preq(9) — the Kernel API Manual moment you've been WAITING for 💫

okay so bestie, gather round, because today we're talking about mesh_queue_preq from the Kernel API Manual, and honestly? it's giving "tiny function, big responsibilities." no cap. 🎀

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✨ NAME ✨

mesh_queue_preq — queue a PREQ to a given destination 🦋

🌸 SYNOPSIS 🌸

void mesh_queue_preq (struct mesh_path *mpath , u8 flags );

like, that's the whole vibe. short. iconic. three tokens and a dream. 💅

💖 ARGUMENTS 💖

• mpath — the mesh path to discover 🔍 literally the thing we're trying to figure out, bestie.
• flags — special attributes of the PREQ to be sent ✨ the little extra seasoning on top, iykyk.

🔥 DESCRIPTION 🔥

okay so the actual description is short but it is so important, do not skip it, I'm serious:

Locking: the function must be called from within a rcu read lock block. 🔒

that's it. that's the whole description. and yet? if you ignore it? chaos. so like… call it inside the rcu read lock block, periodt. 🙈

👑 SEE ALSO 👑

go check these out, they're all in the kernel file ./net/mac80211/mesh_hwmp.c and they're lowkey the whole friend group:

• mesh_path_error_tx(9)
• hwmp_route_info_get(9)
• mesh_path_start_discovery(9)
• mesh_nexthop_resolve(9)
• mesh_nexthop_lookup_nolearn(9)
• mesh_nexthop_lookup(9)

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and that's the page!! 🫶 this little gem lives in ./net/mac80211, the manual is dated October 2026, and it's brought to you by the Kernel API Manual — go forth and queue those PREQs responsibly, bestie. 💜⭐🍓