NAME
umad_recv - receive umad
SYNOPSIS
#include <infiniband/umad.h>
int umad_recv(int portid, void *umad, int *length, int timeout_ms);
DESCRIPTION
umad_recv() waits up to timeout_ms milliseconds for a packet to be
received from the port specified by portid. The packet is copied to
the umad buffer if there is sufficient room and the received length is
indicated. If the buffer is not large enough, the size of the umad
buffer needed is returned in length. A negative timeout_ms makes the
function block until a packet is received. A timeout_ms parameter of
zero indicates a non blocking read.
RETURN VALUE
umad_recv() returns non negative receiving agentid on success, and a
negative value on error as follows:
-EINVAL invalid port handle or agentid
-EIO receive operation failed
-EWOULDBLOCK non blocking read can’t be fulfilled
SEE ALSO
umad_poll(3)
AUTHOR
Hal Rosenstock <halr@voltaire.com>