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       ibv_create_ah,  ibv_destroy_ah  -  create  or destroy an address handle


       #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);


       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.


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

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


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


       Dotan Barak <>

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