IBV_OPEN_QP(3) Libibverbs Programmer's Manual IBV_OPEN_QP(3)
NAME
ibv_open_qp - open a shareable queue pair (QP)
SYNOPSIS
#include <infiniband/verbs.h>
struct ibv_qp *ibv_open_qp(struct ibv_context *context,
struct ibv_qp_open_attr *qp_open_attr);
DESCRIPTION
ibv_open_qp() opens an existing queue pair (QP) associated with the ex-
tended protection domain xrcd. The argument qp_open_attr is an
ibv_qp_open_attr struct, as defined in <infiniband/verbs.h>.
struct ibv_qp_open_attr {
uint32_t comp_mask; /* Identifies valid fields */
uint32_t qp_num; /* QP number */
struct *ibv_xrcd; /* XRC domain */
void *qp_context; /* User defined opaque value */
enum ibv_qp_type qp_type; /* QP transport service type */
ibv_destroy_qp() closes the opened QP and destroys the underlying QP if
it has no other references. qp.
RETURN VALUE
ibv_open_qp() returns a pointer to the opened QP, or NULL if the re-
quest fails. Check the QP number (qp_num) in the returned QP.
NOTES
ibv_open_qp() will fail if a it is asked to open a QP that does not ex-
ist within the xrcd with the specified qp_num and qp_type.
SEE ALSO
ibv_alloc_pd(3), ibv_create_qp(3), ibv_create_qp_ex(3), ibv_mod-
ify_qp(3), ibv_query_qp(3)
AUTHORS
Sean Hefty <sean.hefty@intel.com>
libibverbs 2011-08-12 IBV_OPEN_QP(3)
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