一文读懂RDMA: Remote Direct Memory Access（远程直接内存访问）

#include <rdma/rdma_verbs.h>

// 注册内存
struct ibv_mr *ibv_reg_mr(struct ibv_pd *pd, void *addr, size_t length, int access);

// 创建QP (Queue Pair)
struct ibv_qp *ibv_create_qp(struct ibv_pd *pd, struct ibv_qp_init_attr *qp_init_attr);

// 绑定QP到端口
int ibv_bind_mw(struct ibv_qp *qp, struct ibv_mr *mr, enum ibv_access_flags access);

// 修改QP状态
int ibv_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask);

// 发送RDMA操作
int ibv_post_send(struct ibv_qp *qp, struct ibv_send_wr *wr, struct ibv_send_wr **bad_wr);

// 注册信息
struct ibv_ah *ibv_create_ah(struct ibv_pd *pd, struct ibv_ah_attr *attr);

// 注册路由信息
int ibv_attach_mcast(struct ibv_qp *qp, const union ibv_gid *gid, uint16_t lid);

// 注销路由信息
int ibv_detach_mcast(struct ibv_qp *qp, const union ibv_gid *gid, uint16_t lid);