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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Kconfig	…
Makefile	…
acl.h	…
auth.c	…
auth.h	…
blocklayout.c	…
blocklayoutxdr.c	…
blocklayoutxdr.h	…
cache.h	…
current_stateid.h	…
export.c	…
export.h	…
fault_inject.c	…
filecache.c	…
filecache.h	…
flexfilelayout.c	…
flexfilelayoutxdr.c	…
flexfilelayoutxdr.h	…
idmap.h	…
lockd.c	…
netns.h	…
nfs2acl.c	…
nfs3acl.c	…
nfs3proc.c	…
nfs3xdr.c	…
nfs4acl.c	…
nfs4callback.c	SUNRPC: Fix backchannel RPC soft lockups	2020-04-29 16:33:18 +02:00
nfs4idmap.c	…
nfs4layouts.c	nfsd: fix delay timer on 32-bit architectures	2020-02-11 04:35:46 -08:00
nfs4proc.c	…
nfs4recover.c	…
nfs4state.c	nfsd: fix jiffies/time_t mixup in LRU list	2020-02-11 04:35:47 -08:00
nfs4xdr.c	…
nfscache.c	…
nfsctl.c	nfsd: fsnotify on rmdir under nfsd/clients/	2020-04-17 10:50:20 +02:00
nfsd.h	…
nfsfh.c	…
nfsfh.h	…
nfsproc.c	…
nfssvc.c	…
nfsxdr.c	…
pnfs.h	…
state.h	nfsd: fix jiffies/time_t mixup in LRU list	2020-02-11 04:35:47 -08:00
stats.c	…
stats.h	…
trace.c	…
trace.h	…
vfs.c	nfsd: Clone should commit src file metadata too	2020-02-24 08:36:38 +01:00
vfs.h	…
xdr.h	…
xdr3.h	…
xdr4.h	…
xdr4cb.h	…