STRUCT RDMA_DEV_ADDR(9)

💖 NAME 💖

okay so bestie, gather round — struct rdma_dev_addr is the struct that contains resolved RDMA hardware addresses. that's the whole vibe. it's the little glow-up container where your addresses come out all resolved and pretty ✨

(this is a page from the Kernel API Manual, section 9, and yes we're reading it for fun. iykyk 💅)

✨ SYNOPSIS ✨

like, literally, here's the whole shape of her. no notes:

struct rdma_dev_addr {
    unsigned char src_dev_addr[MAX_ADDR_LEN];
    unsigned char dst_dev_addr[MAX_ADDR_LEN];
    unsigned char broadcast[MAX_ADDR_LEN];
    unsigned short dev_type;
    int bound_dev_if;
    enum rdma_transport_type transport;
    struct net *net;
    const struct ib_gid_attr *sgid_attr;
    enum rdma_network_type network;
    int hoplimit;
 };

she's got ten fields and every single one is doing her own little thing. main character energy fr fr 🎀

🌸 Members 🌸

• src_dev_addr — the source MAC address. the "where you're coming from" of it all 🫶
• dst_dev_addr — the destination MAC address. where you're headed, bestie 🦋
• broadcast — the broadcast address of the device. shouting it to everybody in the room 📣
• dev_type — the interface hardware type of the device. so we know what kind of little guy we're dealing with 💀
• bound_dev_if — an optional device interface index. optional!! she's not clingy 💅
• transport — the transport type used. the ride you picked, lowkey 🚗
• net — the network namespace containing the bound_dev_if net_dev. her whole little universe 🌈
• sgid_attr — GID attribute to use for identified SGID. yes bestie the GID gets an attribute, that's just how she rolls 👑

ngl, the struct up top also has network (an enum rdma_network_type) and hoplimit (an int) — they're right there in the definition, but the Members rundown doesn't spell them out. so I'm not gonna make anything up about them. no cap 🙈

🦋 SEE ALSO 🦋

• the kernel file ./include/rdma/ib_addr.h — go read her, she's iconic
• rdma_translate_ip(9)
• rdma_resolve_ip(9)

and that's the page!! 🎀 slay, you now know struct rdma_dev_addr better than you know your own playlist 💜

with love, from ./include/rdma, dated October 2026 — see you in the next group chat, bestie 🫶✨