NFS: Remove bad delegations during open recovery

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I put the client into an open recovery loop by:
	Client: Open file
		read half
	Server: Expire client (echo 0 > /sys/kernel/debug/nfsd/forget_clients)
	Client: Drop vm cache (echo 3 > /proc/sys/vm/drop_caches)
		finish reading file

This causes a loop because the client never updates the nfs4_state after
discovering that the delegation is invalid.  This means it will keep
trying to read using the bad delegation rather than attempting to re-open
the file.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
CC: stable@vger.kernel.org [3.4+]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

...

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Bryan Schumaker 2012-09-26 15:25:52 -04:00 • committed by Trond Myklebust

parent fcb6d9c6b7

commit 6938867edb

1 changed files with 4 additions and 0 deletions

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fs/nfs/nfs4proc.c

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