NAME

rpma_utils_get_ibv_context - obtain an RDMA device context by IP address

SYNOPSIS

      #include <librpma.h>
      struct ibv_context;
      enum rpma_util_ibv_context_type {
              RPMA_UTIL_IBV_CONTEXT_LOCAL,
              RPMA_UTIL_IBV_CONTEXT_REMOTE
      };
      int rpma_utils_get_ibv_context(const char *addr, enum rpma_util_ibv_context_type type,
              struct ibv_context **ibv_ctx_ptr);

DESCRIPTION

rpma_utils_get_ibv_context() obtains an RDMA device context by the given IPv4/IPv6 address (either local or remote) using the TCP RDMA port space (RDMA_PS_TCP) - reliable, connection-oriented and message-based QP communication. Possible values of the 'type' argument:

• RPMA_UTIL_IBV_CONTEXT_LOCAL - lookup for a device based on the given local address
• RPMA_UTIL_IBV_CONTEXT_REMOTE - lookup for a device based on the given remote address

RETURN VALUE

The rpma_utils_get_ibv_context() function returns 0 on success or a negative error code on failure. rpma_utils_get_ibv_context() does not set *ibv_ctx_ptr value on failure.

ERRORS

rpma_utils_get_ibv_context() can fail with the following errors:

• RPMA_E_INVAL - addr or ibv_ctx_ptr is NULL or type is unknown
• RPMA_E_NOMEM - out of memory
• RPMA_E_PROVIDER - rdma_getaddrinfo(), rdma_create_id(), rdma_bind_addr() or rdma_resolve_addr() failed, the exact cause of the error can be read from the log

SEE ALSO

rpma_peer_new(3), rpma_utils_ibv_context_is_odp_capable(3), librpma(7) and https://pmem.io/rpma/