IBV_CREATE_AH

NAME

ibv_create_ah, ibv_destroy_ah - create or destroy an address handle (AH)

SYNOPSIS

#include <infiniband/verbs.h>

struct ibv_ah *ibv_create_ah(struct ibv_pd *pd,
struct ibv_ah_attr *attr);

int ibv_destroy_ah(struct ibv_ah *ah);

DESCRIPTION

ibv_create_ah() creates an address handle (AH) associated with the protection domain pd. The argument attr is an ibv_ah_attr struct, as defined in <infiniband/verbs.h>.

struct ibv_ah_attr {

struct ibv_global_route grh; /* Global Routing Header (GRH) attributes */
uint16_t dlid; /* Destination LID */
uint8_t sl; /* Service Level */
uint8_t src_path_bits; /* Source path bits */
uint8_t static_rate; /* Maximum static rate */
uint8_t is_global; /* GRH attributes are valid */
uint8_t port_num; /* Physical port number */

};

struct ibv_global_route {

union ibv_gid dgid; /* Destination GID or MGID */
uint32_t flow_label; /* Flow label */
uint8_t sgid_index; /* Source GID index */
uint8_t hop_limit; /* Hop limit */
uint8_t traffic_class; /* Traffic class */

};

ibv_destroy_ah() destroys the AH ah.

RETURN VALUE

ibv_create_ah() returns a pointer to the created AH, or NULL if the request fails.

NOTES

If port flag IBV_QPF_GRH_REQUIRED is set then ibv_create_ah() must be created with definition of ’struct ibv_ah_attr { .is_global = 1; .grh = {...}; }’.

ibv_destroy_ah() returns 0 on success, or the value of errno on failure (which indicates the failure reason).

SEE ALSO

ibv_alloc_pd(3), ibv_init_ah_from_wc(3), ibv_create_ah_from_wc(3)

AUTHORS

Dotan Barak <dotanba@gmail.com>