fcoe_link_speed_update(9)

💅 fcoe_link_speed_update — a kernel API manual page, bestie edition

okay so real talk, this is a page from the Kernel API Manual, and honestly? it's a little one. but it's iconic in its own lowkey way. let's get into it 🫶

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✨ NAME ✨

fcoe_link_speed_update — literally just updates the supported and actual link speeds. that's the whole gig. no cap. 🌈

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🦋 SYNOPSIS 🦋

int fcoe_link_speed_update (struct fc_lport *lport );

that's it. that's the signature. she's short and she knows it 💅

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🎀 ARGUMENTS 🎀

• lport — the local port you're updating speeds for. the main character of this function, fr fr. ✨

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🍓 DESCRIPTION 🍓

okay this is the important part so pay attention bestie:

The caller must hold the netdev's ops lock. 🔒

like, that's not optional. that's not a suggestion. hold the lock, or don't come crying to me. this is the one caveat and she means it. 😭

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👑 RETURN 👑

• 0 — the ethtool query was successful. slay. we ate. ✅
• -1 — the ethtool query failed. not slay. we did not eat. 💀

that's the whole return contract, no in-between, no vibes in the middle.

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🌸 SEE ALSO 🌸

this is the friend group, and honestly it's a big friend group. every single one of these is tagged (9), and they all live in the kernel file ./drivers/scsi/fcoe/fcoe_transport.c:

• __fcoe_get_lesb(9)
• fcoe_get_lesb(9)
• fcoe_ctlr_get_lesb(9)
• fcoe_validate_vport_create(9)
• fcoe_get_wwn(9)
• fcoe_fc_crc(9)
• fcoe_start_io(9)
• fcoe_clean_pending_queue(9)
• fcoe_check_wait_queue(9)
• fcoe_queue_timer(9)
• fcoe_get_paged_crc_eof(9)
• fcoe_transport_lookup(9)
• fcoe_transport_attach(9)
• fcoe_transport_detach(9)
• fcoe_netdev_map_lookup(9)
• fcoe_if_to_netdev(9)
• libfcoe_device_notification(9)
• fcoe_transport_create(9)
• fcoe_transport_destroy(9)
• fcoe_transport_disable(9)
• fcoe_transport_enable(9)
• libfcoe_init(9)
• libfcoe_exit(9)

like, that's twenty-three functions. twenty-three!! go read them, i'll wait 🧚💜

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and that's the whole page, bestie. it came from the source directory ./drivers/scsi/fcoe, dated October 2026, and it's filed under Kernel API Manual in the header and footer of the original. so like… that's the citation. periodt. 🎀✨💖