umad_register23

Usage

#include <infiniband/umad.h>

int umad_register2(int port_fd, struct umad_reg_attr *attr, uint32_t *agent_id);

Overview

umad_register2() registers for a MAD agent using the provided registration attributes

port_fd the port on which to register the agent

attr The registration attributes as defined by the structure passed. See below for details of this structure.

agent_id returned on success. agent_id identifies the kernel MAD agent a MAD is received by or to be sent by. agent_id is returned in the umad header "struct ib_user_mad" on recv and specified in umad_send when sending.

Registration attribute structure

struct umad_reg_attr {
uint8_t    mgmt_class;
uint8_t    mgmt_class_version;
uint32_t   flags;
uint64_t   method_mask[2];
uint32_t   oui;
uint8_t    rmpp_version;
};
mgmt_class
Management class to register for.
mgmt_class_version
Management class version to register for.
flags
Registration flags.  If a flag specified is not supported by the kernel,
an error is returned, and the supported flags are returned in this field.

Current flags are: UMAD_USER_RMPP -- flag to indicate the kernel should not process RMPP packets. All RMPP packets will be treated like individual MADs. The user is responsible for implementing the RMPP protocol.

method_mask A bit mask which indicates which unsolicited methods this agent should receive. Setting this array to 0 will result in the agent only receiving response MADs for which a request was sent.

oui The oui (in host order) to use for vendor classes 0x30 - 0x4f. Otherwise ignored.

rmpp_version If the class supports RMPP and kernel RMPP is enabled (the default) indicate which rmpp_version to use.

Return value

umad_register2() returns 0 on success and +ERRNO on failure.