rvt_process_mad(9)

🌸 rvt_process_mad(9) — from the Kernel API Manual, bestie 💅

okay so picture this: it's a whole kernel API manpage, the function is rvt_process_mad, and it lives in section 9. that's the vibe. let's GO ✨

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✨ NAME ✨

rvt_process_mad — process an incoming MAD packet 🎀

like, a MAD packet literally walks in the door and this function is the main character who deals with it. periodt.

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🦋 SYNOPSIS 🦋

int rvt_process_mad (struct ib_device *ibdev , int mad_flags , u32
       port_num , const struct ib_wc *in_wc , const struct ib_grh *in_grh ,
       const struct ib_mad_hdr *in , size_t in_mad_size , struct ib_mad_hdr
       *out , size_t *out_mad_size , u16 *out_mad_pkey_index );

that's ten (10) arguments bestie. ten. she's high maintenance and we respect it 💅

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🌈 ARGUMENTS 🌈

• ibdev — the infiniband device this packet came in on. like, which device is the one that received it 🫶
• mad_flags — MAD flags. yes queen, flags for the MAD 🚩
• port_num — the port number this packet came in on, 1 based from ib core. so do NOT come at her with 0-indexed energy, that's not the assignment 💀
• in_wc — the work completion entry for this packet. the receipts of packet-land, fr fr ✨
• in_grh — the global route header for this packet. the gps directions basically 🗺️
• in — the incoming MAD. the actual packet girlie herself 👑
• in_mad_size — size of the incoming MAD reply 🔥
• out — any outgoing MAD reply. where the response goes if there is one 🌸
• out_mad_size — size of the outgoing MAD reply 📏
• out_mad_pkey_index — unused. literally described as "unused". that's all the original says, no cap 🙈

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💖 DESCRIPTION 💖

okay so important detail: the verbs framework has already done the MAD sanity checks for you, and it's already handled the hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE MADs. so don't be out here redoing that work, bestie, it's giving "didn't read the docs" 😭

this function is called by the ib_mad module. so it's not a "you call it whenever" situation — the ib_mad module is the one knocking on the door 🚪

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⭐ RETURN ⭐

IB_MAD_RESULT_SUCCESS or error 🌟

that's it. success or error. no in-between, no "it depends", just vibes passing or vibes failing 💀

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/infiniband/sw/rdmavt/mad.c — go read the source, iykyk 📖
• rvt_create_mad_agents(9)
• rvt_free_mad_agents(9)

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okay that's the whole page, you ate that 🫶 no skips, every single argument accounted for, nothing dropped. slay 💜

and per the footer: this little beauty comes from ./drivers/infiniband/sw/rdmavt, dated October 2026, and she's rvt_process_mad(9) — that's the sign-off bestie, mwah 🎀✨