UMAD_FREE(3) OpenIB Programmer's Manual UMAD_FREE(3)NAME
umad_free - frees memory of umad buffers
SYNOPSIS
#include <infiniband/umad.h>
void umad_free(void *umad);
DESCRIPTION
umad_free() frees memory previously allocated with umad_alloc().
RETURN VALUE
umad_free() returns no value.
SEE ALSO umad_alloc(3)AUTHOR
Hal Rosenstock <halr@voltaire.com>
OpenIB May 17, 2007 UMAD_FREE(3)
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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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