ib_modify_port(9)

💅 ib_modify_port(9) — the kernel API manual, but make it group-chat

okay so bestie, welcome to the ib_modify_port(9) page from the Kernel API Manual ✨ this is the one that changes a port's attributes, and honestly? it's giving "small function, big responsibility" energy 🎀

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🌸 NAME 🌸

ib_modify_port — Modifies the attributes for the specified port.

like literally, that's the whole job. it modifies stuff. on a port. iconic behavior fr fr 💅

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✨ SYNOPSIS ✨

int ib_modify_port (struct ib_device *device , u32 port_num , int
port_modify_mask , struct ib_port_modify *port_modify );

returns an int, takes four things, and the line break in the middle of int is exactly how the original has it, so we're keeping it, no cap 🫶

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🦋 ARGUMENTS 🦋

• device — The device to modify. like, the whole device. she's the main character here 👑
• port_num — The number of the port to modify. which port? this port. u32 says so 💜
• port_modify_mask — Mask used to specify which attributes of the port to change. it's the vibe check for "what are we even touching" ⭐
• port_modify — New attribute values for the port. the actual glow-up content lives in here, in a struct ib_port_modify 😭

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🔥 DESCRIPTION 🔥

ib_modify_port changes a port's attributes as specified by the port_modify_mask and port_modify structure.

that's it. that's the whole description. short king energy 👑 the mask picks which attributes, the port_modify struct carries the new values, and the port comes out the other side with a fresh fit 💅✨

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🌈 SEE ALSO 🌈

Kernel file ./drivers/infiniband/core/device.c — and also, bestie, get comfy, because this list is LONG and we are NOT skipping a single one 🙈 (the way this function has so many friends, highkey networking queen behavior 💀):

• rdma_dev_access_netns(9)
• rdma_dev_has_raw_cap(9)
• ib_device_put(9)
• _ib_alloc_device(9)
• ib_dealloc_device(9)
• ib_port_immutable_read(9)
• ib_register_device(9)
• ib_unregister_device(9)
• ib_unregister_device_and_put(9)
• ib_unregister_driver(9)
• ib_unregister_device_queued(9)
• ib_register_client(9)
• ib_unregister_client(9)
• ib_get_client_nl_info(9)
• ib_set_client_data(9)
• ib_register_event_handler(9)
• ib_unregister_event_handler(9)
• ib_query_port(9)
• ib_device_set_netdev(9)
• ib_query_netdev_port(9)
• ib_device_get_by_netdev(9)
• ib_enum_roce_netdev(9)
• ib_enum_all_roce_netdevs(9)
• ib_device_enable_gid_updates(9)
• ib_device_disable_gid_updates(9)
• ib_query_pkey(9)
• ib_modify_device(9)
• ib_find_gid(9)
• ib_find_pkey(9)
• ib_get_net_dev_by_params(9)

not me listing all thirty of them 💀 but like, every single one matters, iykyk 🧚

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💖 reminder bestie: ib_modify_port needs that port_modify_mask to know what it's allowed to touch, and the port_modify struct for the actual values. don't come for me if you pass a mask that doesn't match what you put in the struct — the manpage told you what it does and nothing more, so we're not out here inventing behavior fr fr 🫶

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and that's the page!! 🌸 this came out of ./drivers/infiniband/core in October 2026, from the Kernel API Manual — slay, bye, go modify some ports responsibly 💅✨