dcb_ieee_getapp_mask(9)

💅 dcb_ieee_getapp_mask(9) — from the Kernel API Manual, bestie

okay so real talk, this one lives in the kernel's net/dcb world and it's a whole little helper function. let's get into it 🫶

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✨ NAME ✨

dcb_ieee_getapp_mask — retrieve the IEEE DCB application priority 💖

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🦋 SYNOPSIS 🦋

u8 dcb_ieee_getapp_mask (struct net_device *dev , struct dcb_app *app );

like, look at her. u8 return type, two pointers, no notes. main character energy fr fr 🌈

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🎀 ARGUMENTS 🎀

• dev — the network interface, aka the device we're poking at 👑
• app — where to store the retrieve application data. yes "the retrieve" — that's the original wording and I'm not touching it, it's iconic in its own way 😭 that's ur output spot, so make sure it points somewhere real

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🌸 DESCRIPTION 🌸

so this is a helper routine, right? and on success it returns a non-zero 802.1Qaz user priority bitmap ✨

but if it can't find the dcb_app in the APP list? it returns 0, and that 0 is the "not found" signal, bestie 💀 so don't go reading 0 as "a priority of zero" and building a whole personality around it. 0 means not in the list, bestie, it's not there 🙈

quick vibe check on the return value:

• non-zero → here's your 802.1Qaz user priority bitmap, slay 💅
• 0 → the dcb_app was not found in the APP list 🫶

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🔥 SEE ALSO 🔥

• the kernel file ./net/dcb/dcbnl.c — go read the source, iykyk 👀
• dcb_getapp(9)
• dcb_setapp(9)
• dcb_ieee_setapp(9)
• dcb_ieee_delapp(9)

the whole little dcb friend group, honestly obsessed with them 🌸

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aaaand that's the page! 💜 this one came from ./net/dcb, dated October 2026, and it's dcb_ieee_getapp_mask(9) — no cap, that's the whole source and date situation, periodt 💅✨