ib_set_cpi_capmask2(9)

💅 ib_set_cpi_capmask2(9) 💅

okay so this is a page from the Kernel API Manual (yes, the kernel has lore too, and this is part of it 🫶), and it's about one very specific little function that sets one very specific little field. is it glamorous? no. is it essential? absolutely. let's get into it ✨

---

🌸 NAME 🌸

ib_set_cpi_capmask2 — literally just sets the capmask2 in an ib_class_port_info mad. that's the whole job. she's a one-task icon and honestly? respect 💅

---

🦋 SYNOPSIS 🦋

void ib_set_cpi_capmask2 (struct ib_class_port_info *cpi , u32 capmask2
);

it returns void bestie, so don't go looking for a return value to check. there isn't one. she does the thing and she leaves 🌈

---

🎀 ARGUMENTS 🎀

• cpi — a struct ib_class_port_info. that's the thing you're poking at 👑
• capmask2 — the capmask2 to set. yes the argument is named the exact same thing it sets. no we're not gonna question it 😭

---

⭐ SEE ALSO ⭐

the kernel file ./include/rdma/ib_mad.h is where the vibes live, plus this whole friend group right here:

• ib_get_cpi_resp_time(9)
• ib_get_cpi_capmask2(9)
• opa_get_cpi_capmask2(9)
• ib_response_mad(9)
• ib_get_rmpp_resptime(9)
• ib_get_rmpp_flags(9)
• ib_set_rmpp_resptime(9)
• ib_set_rmpp_flags(9)
• ib_register_mad_agent(9)
• ib_unregister_mad_agent(9)
• ib_post_send_mad(9)
• ib_free_recv_mad(9)
• ib_modify_mad(9)
• ib_cancel_mad(9)
• ib_create_send_mad(9)
• ib_is_mad_class_rmpp(9)
• ib_get_mad_data_offset(9)
• ib_get_rmpp_segment(9)
• ib_free_send_mad(9)
• ib_mad_kernel_rmpp_agent(9)

like, that's a whole squad of mad-related functions and ib_set_cpi_capmask2 is out here doing her one tiny capmask2 shift. iykyk 💀

---

ngl if you came here looking for drama or undefined behaviour, there isn't any. she's just a setter. a little guy. a legend in her own lane 🧚

---

that's the whole page, bestie 🍓 — brought to you by the source at ./include/rdma, dated October 2026, and signed off with ib_set_cpi_capmask2(9) because we always say the name three times for good luck 💜✨