tc_prog_attach(9)

💅 tc_prog_attach(9) 💅

okay bestie, welcome to the Kernel API Manual entry for tc_prog_attach(9) — it's giving “attach BPF program(s) to an interface” energy, and we are gonna get you all the way together. ✨

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✨ NAME ✨

tc_prog_attach — attach BPF program(s) to an interface. no cap, that's the whole assignment. 🎀

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🌸 SYNOPSIS 🌸

int tc_prog_attach (const char *dev , int ingress_fd , int egress_fd );

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🎀 ARGUMENTS 🎀

• dev — a string containing the interface name, periodt. 💅
• ingress_fd — the file descriptor of the program to attach to interface ingress. 🦋
• egress_fd — the file descriptor of the program to attach to interface egress. 🌸

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💖 DESCRIPTION 💖

okay so here's the vibe: this function takes file descriptors pointing to at least one, at most two BPF programs, and attaches those programs to an interface's ingress, egress, or both. main character behavior honestly. 👑

It returns 0 on success. it returns -1 if no valid file descriptor has been found, if the interface name is invalid, or if an error occurred during attach. lowkey important, bestie: check that return value. 😭

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🦋 SEE ALSO 🦋

• Kernel file ./tools/testing/selftests/bpf/network_helpers.h
• open_netns(9)
• append_tid(9)
• csum_tcpudp_magic(9)
• csum_ipv6_magic(9)
• build_udp_v4_csum(9)
• build_udp_v6_csum(9)

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xoxo, your Unix bestie 💖 — source/version: ./tools/testing/selftests/bpf; date: October 2026. periodt. 💅✨