linux/drivers/infiniband/core
Ted Kim c29ed5a456 ib/cm: Change reject message type when destroying cm_id
Problem reported by: Ted Kim <ted.h.kim@oracle.com>:

We have a case where a Linux system and a non-Linux system are
trying to interoperate.  The Linux host is the active side and
starts the connection establishment, but later decides to not go
through with the connection setup and does rdma_destroy_id().

The rdma_destroy_id() eventually works its way down to cm_destroy_id()
in core/cm.c, where a REJ is sent. The non-Linux system
has some trouble recognizing the REJ because of:

A. CM states which can't receive the REJ
B. Some issues about REJ formatting (missing comm ID)

ISSUE A: That part of the spec says, a Consumer Reject REJ can be
sent for a connection abort, but it goes further
and says: can send a REJ message with a "Consumer Reject"
Reason code if they are in a CM state (i.e. REP
Rcvd, MRA(REP) Sent, REQ Rcvd, MRA Sent) that allows
a REJ to be sent (lines 35-38).

Of the states listed there in that sentence, it would
seem to limit the active side to using the Consumer Reject
(for the abort case) in just the REP-Rcvd and MRA-REP-Sent
states. That is basically only after the active side
sees a REP (or alternatively goes down the state transitions
to timeout in which case a Timeout REJ is sent).

As a fix, in cm-destroy-id() move the IB-CM-MRA-REQ-RCVD case
to the same as REQ-SENT.  Essentially, make a REJ sent after
getting an MRA on active side a timeout rather than Consumer-
Reject, which is arguably more correct with the CM state
diagrams previous to getting a REP.

Signed-off-by: Ted Kim <ted.h.kim@oracle.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
2015-05-20 12:41:38 -04:00
..
addr.c IB/core: change rdma_gid2ip into void function as it always return zero 2015-05-05 13:21:27 -04:00
agent.c IB/mad: add new ioctl to ABI to support new registration options 2014-08-10 20:36:00 -07:00
agent.h
cache.c IB/core: Add ib_find_exact_cached_pkey() 2012-09-30 20:33:30 -07:00
cm_msgs.h IB/core: Fix unaligned accesses 2015-05-05 13:21:27 -04:00
cm.c ib/cm: Change reject message type when destroying cm_id 2015-05-20 12:41:38 -04:00
cma.c RDMA/CMA: Canonize IPv4 on IPV6 sockets properly 2015-05-05 09:18:01 -04:00
core_priv.h IB/core: Resolve Ethernet L2 addresses when modifying QP 2014-01-19 15:14:04 -08:00
device.c IB/core: Handle table with full and partial membership for the same P_Key 2012-09-30 20:33:29 -07:00
fmr_pool.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
iwcm.c RDMA/iwcm: Use a default listen backlog if needed 2014-08-05 07:33:24 -07:00
iwcm.h
iwpm_msg.c RDMA/core: Fix for parsing netlink string attribute 2015-05-12 13:03:04 -04:00
iwpm_util.c RDMA/core: Enable the iWarp Port Mapper to provide the actual address of the connecting peer to its clients 2015-05-05 09:18:01 -04:00
iwpm_util.h RDMA/core: Enable the iWarp Port Mapper to provide the actual address of the connecting peer to its clients 2015-05-05 09:18:01 -04:00
mad_priv.h IB/mad: Update module to [pr|dev]_* style print messages 2014-08-10 20:35:39 -07:00
mad_rmpp.c
mad_rmpp.h
mad.c IB/mad: Add user space RMPP support 2014-08-10 20:36:00 -07:00
Makefile IB/core: Implement support for MMU notifiers regarding on demand paging regions 2014-12-15 18:13:36 -08:00
multicast.c IB/core: Fix mgid key handling in SA agent multicast data-base 2014-12-15 18:10:13 -08:00
netlink.c RDMA/core: Add support for iWARP Port Mapper user space service 2014-06-10 10:11:45 -07:00
packer.c
sa_query.c IB/mad: add new ioctl to ABI to support new registration options 2014-08-10 20:36:00 -07:00
sa.h
smi.c
smi.h
sysfs.c IB/core: Fix kobject leak on device register error flow 2014-06-05 09:37:10 -07:00
ucm.c IB/core: convert to idr_alloc() 2013-02-27 19:10:16 -08:00
ucma.c IB/core: When marshaling ucma path from user-space, clear unused fields 2015-02-17 12:34:52 -08:00
ud_header.c
umem_odp.c IB/core: dma unmap optimizations 2015-05-05 09:18:02 -04:00
umem_rbtree.c IB/core: Implement support for MMU notifiers regarding on demand paging regions 2014-12-15 18:13:36 -08:00
umem.c IB/core: don't disallow registering region starting at 0x0 2015-04-15 16:05:02 -04:00
user_mad.c IB/mad: Add user space RMPP support 2014-08-10 20:36:00 -07:00
uverbs_cmd.c Merge branches 'core', 'cxgb4', 'iser', 'mlx4', 'mlx5', 'ocrdma', 'odp', 'qib' and 'srp' into for-next 2015-02-20 09:04:40 -08:00
uverbs_main.c ib_uverbs: Fix pages leak when using XRC SRQs 2015-04-15 16:06:39 -04:00
uverbs_marshall.c IB/core: When marshaling uverbs path, clear unused fields 2014-09-22 09:46:52 -07:00
uverbs.h IB/core: Add support for extended query device caps 2015-02-18 08:36:26 -08:00
verbs.c IB/core: Do not resolve VLAN if already resolved 2014-12-15 18:10:12 -08:00