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linux/fs/nfs/filelayout
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NeilBrown adfffd77aa NFSv4.1: nfs4_fl_prepare_ds must be careful about reporting success. 
commit cfd278c280 upstream.

Various places assume that if nfs4_fl_prepare_ds() turns a non-NULL 'ds',
then ds->ds_clp will also be non-NULL.

This is not necessasrily true in the case when the process received a fatal signal
while nfs4_pnfs_ds_connect is waiting in nfs4_wait_ds_connect().
In that case ->ds_clp may not be set, and the devid may not recently have been marked
unavailable.

So add a test for ds_clp == NULL and return NULL in that case.

Fixes: c23266d532 ("NFS4.1 Fix data server connection race")
Signed-off-by: NeilBrown <neilb@suse.com>
Acked-by: Olga Kornievskaia <aglo@umich.edu>
Acked-by: Adamson, Andy <William.Adamson@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2017-03-16 02:26:38 +00:00
..
filelayout.c NFSv4: Ensure that we call FREE_STATEID when NFSv4.x stateids are revoked 2014-11-27 11:21:46 +00:00
filelayout.h Push the file layout driver into a subdirectory 2014-05-29 20:21:56 -04:00
filelayoutdev.c NFSv4.1: nfs4_fl_prepare_ds must be careful about reporting success. 2017-03-16 02:26:38 +00:00
Makefile Push the file layout driver into a subdirectory 2014-05-29 20:21:56 -04:00