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umad_get_fd(3) [centos man page]

UMAD_GET_FD(3)						    OpenIB Programmer's Manual						    UMAD_GET_FD(3)

NAME
umad_get_fd - get the umad fd for the requested port SYNOPSIS
#include <infiniband/umad.h> int umad_get_fd(int portid); DESCRIPTION
umad_get_fd() returns the umad fd for the port specified by portid. RETURN VALUE
umad_get_fd() returns the fd for the portid requested or -EINVAL if portid is invalid. AUTHOR
Hal Rosenstock <halr@voltaire.com> OpenIB May 17, 2007 UMAD_GET_FD(3)

Check Out this Related Man Page

UMAD_RECV(3)						    OpenIB Programmer's Manual						      UMAD_RECV(3)

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 buf- fer 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. Note length is a pointer to the length of the data portion of the umad buffer. This means that umad must point to a buffer at least umad_size() + *length bytes long. Note also that *length must be >= 256 bytes. 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 or *length is less than the minimum supported -EIO receive operation failed -EWOULDBLOCK non blocking read can't be fulfilled SEE ALSO
umad_poll(3) AUTHOR
Hal Rosenstock <halr@voltaire.com> OpenIB May 11, 2007 UMAD_RECV(3)
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