aa6964e585
This is a preparation to unify getting buffers, filling iovecs, and filling WRs in a single API in RDMA transport and then to unify it among RDMA, TCP, and FC transport. Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Change-Id: Ia69d4409c8cccaf8d7298706d61cd4e2d35e4406 Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/468944 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Alexey Marchuk <alexeymar@mellanox.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Seth Howell <seth.howell@intel.com>