STRUCT RTRS_MSG_CONN_REQ(9)

✨ NAME ✨

struct rtrs_msg_conn_req — Client connection request to the server 💌

okay so bestie, this is the struct rtrs_msg_conn_req(9) page from the Kernel API Manual, and it's literally the “hey server, can we connect?” message in struct form. The client sends it, the server receives it, and the vibes are immaculate 🫶.

✨ SYNOPSIS ✨

struct rtrs_msg_conn_req {
    u8 __cma_version;
    u8 __ip_version;
    __le16 magic;
    __le16 version;
    __le16 cid;
    __le16 cid_num;
    __le16 recon_cnt;
    uuid_t sess_uuid;
    uuid_t paths_uuid;
    u8 first_conn : 1;
};

🧚 Members 🧚

• __cma_version — Set to 0 by cma.c in case of AF_IB, and do not touch that, bestie. See https://www.spinics.net/lists/linux-rdma/msg22397.html — iykyk.
• __ip_version — On the sender side this should be set to 0, or cma_save_ip_info will extract garbage and fail. That's a no-cap warning, fr fr 🙈.
• magic — RTRS magic ✨
• version — RTRS protocol version
• cid — Current connection id
• cid_num — Number of connections per session
• recon_cnt — Reconnections counter
• sess_uuid — UUID of a session (path)
• paths_uuid — UUID of a group of sessions (paths)
• first_conn — 1 if the connection request is the first for that session, otherwise 0.

💀 NOTE 💀

max size 56 bytes, see man rdma_connect 👀. That's the whole note, and it's highkey important.

🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/ulp/rtrs/rtrs-pri.h enum rtrs_msg_types(9), enum rtrs_msg_flags(9), struct rtrs_sg_desc(9), struct rtrs_msg_conn_rsp(9), struct rtrs_msg_info_req(9), struct rtrs_msg_info_rsp(9), struct rtrs_msg_rkey_rsp(9), struct rtrs_msg_rdma_read(9), struct rtrs_msg_rdma_write(9), struct rtrs_msg_rdma_hdr(9)

xoxo, your ./drivers/infiniband/ulp/rtrs bestie — October 2026 edition of struct rtrs_msg_conn_req(9), mwah 💋.