ksz_port_set_apptrust(9)

💅 ksz_port_set_apptrust(9) — a Kernel API Manual moment, section 9, bestie 💅

okay so this is the page for ksz_port_set_apptrust from the Kernel API Manual, and it is lowkey iconic: it sets the apptrust selectors for a port on a KSZ switch. Very “specific little helper doing its one job,” and honestly? We love that for it. 🎀

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🌸 NAME 🌸

ksz_port_set_apptrust — sets the apptrust selectors for a port on a KSZ switch. periodt. 💖

✨ SYNOPSIS ✨

int ksz_port_set_apptrust (struct dsa_switch *ds , int port , const u8
*sel , int nsel );

🎀 ARGUMENTS 🎀

• ds — Pointer to the DSA switch structure. That’s the switch bb. 🦋
• port — Port number for which to set the apptrust selectors. Yes, the specific port, no vague vibes.
• sel — Array of apptrust selectors to set. The selector lineup.
• nsel — Number of apptrust selectors in the array. Gotta know how many besties are in the array. 💅

🦋 DESCRIPTION 🦋

This function sets the apptrust selectors for the specified port on a KSZ switch. That’s literally the whole plot: you give it the switch, the port, the selectors, and how many selectors there are, and it does the setting. No extra lore in the original, so no cap. ✨

💜 RETURN 💜

0 on success, or a negative error code on failure. So 0 is the slay outcome; a negative error code means something went sideways. 😭

🔥 SEE ALSO 🔥

Kernel file ./drivers/net/dsa/microchip/ksz_dcb.c

And the whole friend group:

• ksz_get_dscp_prio_reg(9)
• ksz_get_apptrust_map_and_reg(9)
• ksz_port_get_default_prio(9)
• ksz_port_set_default_prio(9)
• ksz_port_get_dscp_prio(9)
• ksz_set_global_dscp_entry(9)
• ksz_init_global_dscp_map(9)
• ksz_port_add_dscp_prio(9)
• ksz_port_del_dscp_prio(9)
• ksz_apptrust_error(9)
• ksz_port_set_apptrust_validate(9)
• ksz_port_get_apptrust(9)
• ksz_dcb_init_port(9)
• ksz_dcb_init(9)

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this lil page comes from ./drivers/net/dsa/microchip, dated October 2026 — ksz_port_set_apptrust(9) signing off 💅🌸🫶