Chuck Lever 7e69c9e6bb SUNRPC: Fix backchannel RPC soft lockups ... commit 6221f1d9b6 upstream. Currently, after the forward channel connection goes away, backchannel operations are causing soft lockups on the server because call_transmit_status's SOFTCONN logic ignores ENOTCONN. Such backchannel Calls are aggressively retried until the client reconnects. Backchannel Calls should use RPC_TASK_NOCONNECT rather than RPC_TASK_SOFTCONN. If there is no forward connection, the server is not capable of establishing a connection back to the client, thus that backchannel request should fail before the server attempts to send it. Commit 58255a4e3c ("NFSD: NFSv4 callback client should use RPC_TASK_SOFTCONN") was merged several years before RPC_TASK_NOCONNECT was available. Because setup_callback_client() explicitly sets NOPING, the NFSv4.0 callback connection depends on the first callback RPC to initiate a connection to the client. Thus NFSv4.0 needs to continue to use RPC_TASK_SOFTCONN. Suggested-by: Trond Myklebust <trondmy@hammerspace.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: <stable@vger.kernel.org> # v4.20+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-04-29 16:33:18 +02:00
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auth_gss	sunrpc: Fix gss_unwrap_resp_integ() again	2020-04-23 10:36:41 +02:00
xprtrdma	SUNRPC: Fix backchannel RPC soft lockups	2020-04-29 16:33:18 +02:00
Kconfig	…
Makefile	…
addr.c	…
auth.c	…
auth_null.c	…
auth_unix.c	…
backchannel_rqst.c	…
cache.c	sunrpc: Fix potential leaks in sunrpc_cache_unhash()	2020-02-24 08:36:55 +01:00
clnt.c	…
debugfs.c	…
netns.h	…
rpc_pipe.c	…
rpcb_clnt.c	…
sched.c	…
socklib.c	…
stats.c	…
sunrpc.h	…
sunrpc_syms.c	…
svc.c	…
svc_xprt.c	SUNRPC: Fix backchannel RPC soft lockups	2020-04-29 16:33:18 +02:00
svcauth.c	…
svcauth_unix.c	…
svcsock.c	…
sysctl.c	…
timer.c	…
xdr.c	SUNRPC: Fix another issue with MIC buffer space	2020-01-26 10:01:07 +01:00
xprt.c	…
xprtmultipath.c	…
xprtsock.c	SUNRPC: Fix backchannel RPC soft lockups	2020-04-29 16:33:18 +02:00