RDMAP(3)

💖 RDMAP 💖

okay bestie, so this is packet.transport.rdmap — the RDMAP module from the rdmap 1.0 manual, section 3. it's giving network-nerd royalty, no cap. 🎀

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✨ NAME ✨

packet.transport.rdmap — the RDMAP module, periodt. 💅

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🦋 DESCRIPTION 🦋

so basically? it decodes the RDMAP layer. that's the whole vibe. 🔥

and if you wanna know what RDMAP even is, it's the RFC 5040 Remote Direct Memory Access Protocol Specification — go read it, it's iconic, iykyk. 📜✨

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👑 CLASSES 👑

💜 class OpCode(packet.utils.Enum)

an enum OpCode. short, sweet, main character energy. literally just an enum, and honestly? she's serving. ⭐

🌸 class RDMAP(baseobj.BaseObj)

the RDMAP object itself. the moment. the icon. 🫶

🌈 Usage

like, here's how you actually use her:

from packet.transport.rdmap import RDMAP

x = RDMAP(pktt, pinfo)

boom. two lines. slay. 💖

🎀 Object definition

okay so this is what the object looks like on the inside — every field, exactly as it is:

RDMAP(
    version = int,  # RDMA Protocol version
    opcode  = int,  # RDMA OpCode
    psize   = int,  # Payload Size
    [ # Only valid for Send with Invalidate and Send with Solicited Event
      # and Invalidate Messages
        istag = int,  # Invalidate STag
    ]
    [ # RDMA Read Request Header
        sinkstag = int,  # Data Sink STag
        sinksto  = int,  # Data Sink Tagged Offset
        dma_len  = int,  # RDMA Read Message Size
        srcstag  = int,  # Data Source STag
        srcsto   = int,  # Data Source Tagged Offset
    ]
)

quick breakdown so you're not lost in the sauce:

• version — an int, the RDMA Protocol version. 🌸
• opcode — an int, the RDMA OpCode. what is she doing rn. 💅
• psize — an int, the Payload Size. how much is she carrying. 🎀
• istag — an int, the Invalidate STag. ⚠️ and bestie, listen: this one is only valid for Send with Invalidate and Send with Solicited Event and Invalidate Messages. not for everything else. don't be out here using it wrong. 🙈
• the RDMA Read Request Header block — this whole little squad only shows up for that header:
  • sinkstag — an int, the Data Sink STag. 🦋
  • sinksto — an int, the Data Sink Tagged Offset. 🦋
  • dma_len — an int, the RDMA Read Message Size. 📏
  • srcstag — an int, the Data Source STag. ✨
  • srcsto — an int, the Data Source Tagged Offset. ✨

🧚 Methods defined here

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🌟 __init__(self, pktt, pinfo)

the constructor. the birth of the object. main character origin story fr fr. 🫶

what she does: Initialize object's private data. that's it, that's the job, and she does it flawlessly. 💖

and here's what you're handing her:

• pktt — the Packet trace object (packet.pktt.Pktt), so this layer can actually reach up and see the parent layers. it's giving "i need to know where i came from". 😭
• pinfo — a list of two integers: [RDMAP control, Invalidate STag]. two. exactly two. don't try to be cute with it. 🎀

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🌈 SEE ALSO 🌈

go read these next, bestie, they're all part of the friend group:

• baseobj(3)
• packet.application.rpc(3)
• packet.application.rpcordma(3)
• packet.application.rpcordma_const(3)
• packet.unpack(3)
• packet.utils(3)

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💀 BUGS 💀

No known bugs. not a single one. she's flawless. we love a bug-free queen. 👑✨

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💖 AUTHOR 💖

Jorge Mora (mora@netapp.com) — the legend, the blueprint, the moment. 🫶

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okay that's the whole page, bestie!! and for the cute sign-off: this gorgeous thing came out of NFStest 3.2, dated 21 March 2023 — old enough to be iconic, fresh enough to still slay. bye mwah 💅💖🎀🦋🌸