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   umad_set_grh    ( 3 )

установить поля GRH в буфере umad, используя порядок хоста (set GRH fields within umad buffer using host ordering)

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)