Chuck Lever ef739b2175 xprtrdma: Reset credit grant properly after a disconnect ... On a fresh connection, an RPC/RDMA client is supposed to send only one RPC Call until it gets a credit grant in the first RPC Reply from the server [RFC 8166, Section 3.3.3]. There is a bug in the Linux client's credit accounting mechanism introduced by commit e7ce710a88 ("xprtrdma: Avoid deadlock when credit window is reset"). On connect, it simply dumps all pending RPC Calls onto the new connection. Servers have been tolerant of this bad behavior. Currently no server implementation ever changes its credit grant over reconnects, and servers always repost enough Receives before connections are fully established. To correct this issue, ensure that the client resets both the credit grant _and_ the congestion window when handling a reconnect. Fixes: e7ce710a88 ("xprtrdma: Avoid deadlock when credit ... ") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: stable@kernel.org Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>		2018-10-02 15:45:09 -04:00
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backchannel.c	NFS client updates for Linux 4.18	2018-06-12 10:09:03 -07:00
fmr_ops.c	net/xprtrdma: Simplify ib_post_(send|recv|srq_recv)() calls	2018-07-24 16:06:37 -06:00
frwr_ops.c	RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const	2018-07-30 20:09:34 -06:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
module.c	NFS client updates for Linux 4.18	2018-06-12 10:09:03 -07:00
rpc_rdma.c	xprtrdma: xprt_release_rqst_cong is called outside of transport_lock	2018-10-02 15:26:30 -04:00
svc_rdma_backchannel.c	xprtrdma: Reset credit grant properly after a disconnect	2018-10-02 15:45:09 -04:00
svc_rdma_recvfrom.c	A mistake on my part caused me to tag my branch 6 commits too early,	2018-08-23 16:00:10 -07:00
svc_rdma_rw.c	A mistake on my part caused me to tag my branch 6 commits too early,	2018-08-23 16:00:10 -07:00
svc_rdma_sendto.c	A mistake on my part caused me to tag my branch 6 commits too early,	2018-08-23 16:00:10 -07:00
svc_rdma_transport.c	A mistake on my part caused me to tag my branch 6 commits too early,	2018-08-23 16:00:10 -07:00
svc_rdma.c	sunrpc: remove redundant variables 'checksumlen','blocksize' and 'data'	2018-08-09 16:11:21 -04:00
transport.c	xprtrdma: Reset credit grant properly after a disconnect	2018-10-02 15:45:09 -04:00
verbs.c	NFS client updates for Linux 4.19	2018-08-23 16:03:58 -07:00
xprt_rdma.h	NFS client updates for Linux 4.18	2018-06-12 10:09:03 -07:00