dsa_port_notify(9)

💅 dsa_port_notify(9) — like, the Kernel API Manual page for it ✨

okay so bestie, gather round 🎀 this one lives in section 9 of the Kernel API Manual, and the whole entire function is called dsa_port_notify — yes the man page header literally says dsa_port_notify(9), iconic of her honestly 👑

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🌸 NAME 🌸

dsa_port_notify — notify the switching fabric of changes to a port 💫

like, something moved on a port? the fabric hears about it. that's the gig.

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✨ SYNOPSIS ✨

int dsa_port_notify (const struct dsa_port *dp , unsigned long e , void *v );

three args, one int, no cap 🫶

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🦋 ARGUMENTS 🦋

• dp — the port on which the change occurred 💖 like, this is the port that's going through it rn.
• e — the event, and bestie listen: it must be of type DSA_NOTIFIER_*. non-negotiable, periodt.
• v — the event-specific value. whatever that event needs to carry, it rides along here 🎀

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👑 DESCRIPTION 👑

So here's the vibe check 🔥 this notifies all the switches in the DSA tree that this port's switch belongs to — and yes, that includes this switch itself, she's not exempt, main character energy for everyone 💅 — of an event.

Why? Because it lets the other switches reconfigure themselves for cross-chip operations ✨ teamwork, but make it silicon.

It can also be used to reconfigure ports without net_devices — we're talking CPU ports and DSA links — whenever a user port's state changes 🌈 so even the ports with no net device of their own get their moment, and honestly? obsessed.

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🌟 SEE ALSO 🌟

• Kernel file ./net/dsa/port.c — go read the source, iykyk 💜

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and that's the whole page, babe 🍓 shipped from ./net/dsa in October 2026, with so much love (and a 9 in the corner) 🧚‍♀️ bye bestie, go notify your fabric 💖✨🎀