NFSv4: Fix races between open and delegreturn

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If the server returns the same delegation in an open that we just used
in a delegreturn, we need to ensure we don't apply that stateid if
the delegreturn has freed it on the server.
To do so, we ensure that we do not free the storage for the delegation
until either it is replaced by a new one, or we throw the inode out of
cache.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

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Trond Myklebust 2019-10-21 13:56:59 -04:00

parent 42c304c34e

commit ee05f45677

1 changed files with 29 additions and 35 deletions

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64

fs/nfs/delegation.c

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