linux-toradex.git/include/rdma/rdma_cm.h, branch v3.0.44

RDMA/cma: Pass QP type into rdma_create_id()

2011-05-25T20:46:23+00:00

The RDMA CM currently infers the QP type from the port space selected
by the user.  In the future (eg with RDMA_PS_IB or XRC), there may not
be a 1-1 correspondence between port space and QP type.  For netlink
export of RDMA CM state, we want to export the QP type to userspace,
so it is cleaner to explicitly associate a QP type to an ID.

Modify rdma_create_id() to allow the user to specify the QP type, and
use it to make our selections of datagram versus connected mode.

Signed-off-by: Sean Hefty 
Signed-off-by: Roland Dreier

RDMA/cma: Export enum cma_state in

2011-05-25T20:46:22+00:00

Move cma.c's internal definition of enum cma_state to enum rdma_cm_state
in an exported header so that it can be exported via RDMA netlink.

Signed-off-by: Nir Muchtar 
Signed-off-by: Roland Dreier

RDMA/cma: Add an ID_REUSEADDR option

2011-05-10T05:06:10+00:00

Lustre requires that clients bind to a privileged port number before
connecting to a remote server.  On larger clusters (typically more
than about 1000 nodes), the number of privileged ports is exhausted,
resulting in lustre being unusable.

To handle this, we add support for reusable addresses to the rdma_cm.
This mimics the behavior of the socket option SO_REUSEADDR.  A user
may set an rdma_cm_id to reuse an address before calling
rdma_bind_addr() (explicitly or implicitly).  If set, other
rdma_cm_id's may be bound to the same address, provided that they all
have reuse enabled, and there are no active listens.

If rdma_listen() is called on an rdma_cm_id that has reuse enabled, it
will only succeed if there are no other id's bound to that same
address.  The reuse option is exported to user space.  The behavior of
the kernel reuse implementation was verified against that given by
sockets.

This patch is derived from a path by Ira Weiny 

Signed-off-by: Sean Hefty 
Signed-off-by: Roland Dreier

RDMA/cm: Remove unused definition of RDMA_PS_SCTP

2010-02-11T23:40:25+00:00

The defined SCTP number is incorrect (0x83, rather than 0x84), and
since it is not used anywhere, simply remove the definition.

Signed-off-by: Sean Hefty 
Signed-off-by: Roland Dreier

RDMA/cma: Remove padding arrays by using struct sockaddr_storage

2008-08-04T18:02:14+00:00

There are a few places where the RDMA CM code handles IPv6 by doing

	struct sockaddr		addr;
	u8			pad[sizeof(struct sockaddr_in6) -
				    sizeof(struct sockaddr)];

This is fragile and ugly; handle this in a better way with just

	struct sockaddr_storage	addr;

[ Also roll in patch from Aleksey Senin  to
  switch to struct sockaddr_storage and get rid of padding arrays in
  struct rdma_addr. ]

Signed-off-by: Roland Dreier

RDMA/cma: Add RDMA_CM_EVENT_TIMEWAIT_EXIT event

2008-07-22T21:14:23+00:00

Consumers that want to re-use their QPs in new connections need to
know when the QP has exited the timewait state.  Report the timewait
event through the rdma_cm.

Signed-off-by: Amir Vadai 
Acked-by: Sean Hefty 
Signed-off-by: Roland Dreier

RDMA/cma: Add RDMA_CM_EVENT_ADDR_CHANGE event

2008-07-22T21:14:22+00:00

Add an RDMA_CM_EVENT_ADDR_CHANGE event can be used by rdma-cm
consumers that wish to have their RDMA sessions always use the same
links (eg ) as the IP stack does.  In the current code, this
does not happen when bonding is used and fail-over happened but the IB
link used by an already existing session is operating fine.

Use the netevent notification for sensing that a change has happened
in the IP stack, then scan the rdma-cm ID list to see if there is an
ID that is "misaligned" with respect to the IP stack, and deliver
RDMA_CM_EVENT_ADDR_CHANGE for this ID.  The consumer can act on the
event or just ignore it.

Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

RDMA: Improve include file coding style

2008-07-15T06:48:44+00:00

Remove subversion $Id lines and improve readability by fixing other
coding style problems pointed out by checkpatch.pl.

Signed-off-by: Dotan Barak 
Signed-off-by: Roland Dreier

RDMA: Fix license text

2008-07-15T06:48:43+00:00

The license text for several files references a third software license
that was inadvertently copied in.  Update the license to what was
intended.  This update was based on a request from HP.

Signed-off-by: Sean Hefty 
Signed-off-by: Roland Dreier

RDMA/cma: Add ability to specify type of service

2007-10-10T02:59:12+00:00

Provide support to specify a type of service for a communication
identifier.  A new function call is used when dealing with IPv4
addresses.  For IPv6 addresses, the ToS is specified through the
traffic class field in the sockaddr_in6 structure.

Signed-off-by: Sean Hefty 

[ The comments Eitan Zahavi and myself have made over the v1 post at 
  
  were fully addressed. ]
 
Reviewed-by: Or Gerlitz  
Signed-off-by: Roland Dreier