User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |

---

   umad_set_grh    ( 3 )

---

---

Имя (Name)

umad_set_grh - set GRH fields within umad buffer using host
       ordering

---

Синопсис (Synopsis)

#include <infiniband/umad.h>

       int umad_set_grh(void *umad, void *mad_addr);

---

Описание (Description)

umad_set_grh() sets the GRH fields (grh_present, gid, hop_limit,
       traffic_class, flow_label) within the specified umad buffer based
       on the mad_addr supplied. The provided mad_addr fields are
       expected to be in host order.  If the mad_addr pointer supplied
       is NULL, no GRH is set.  The argument mad_addr is a pointer to an
       ib_mad_addr_t struct, as specified in <infiniband/umad.h>.  The
       argument umad is a pointer to an ib_user_mad_t struct, as
       specified in <infiniband/umad.h>.

       typedef struct ib_mad_addr {
               uint32_t qpn;
               uint32_t qkey;
               uint16_t lid;
               uint8_t  sl;
               uint8_t  path_bits;
               uint8_t  grh_present;
               uint8_t  gid_index;
               uint8_t  hop_limit;
               uint8_t  traffic_class;
               uint8_t  gid[16];
               uint32_t flow_label;
       } ib_mad_addr_t;

       typedef struct ib_user_mad {
               uint32_t agent_id;
               uint32_t status;
               uint32_t timeout_ms;
               uint32_t retries;
               uint32_t length;
               ib_mad_addr_t addr;
               uint8_t  data[0];
       } ib_user_mad_t;

---

Возвращаемое значение (Return value)

umad_set_grh() returns 0 on success, and a negative value on
       errors. Currently, there are no errors indicated.

---

Смотри также (See also)

umad_set_grh_net(3)

---