NFSv4: Resend the READ/WRITE RPC call if a stateid change causes an error

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Adds logic to ensure that if the server returns a BAD_STATEID,
or other state related error, then we check if the stateid has
already changed. If it has, then rather than start state recovery,
we should just resend the failed RPC call with the new stateid.

Allow nfs4_select_rw_stateid to notify that the stateid is unstable by
having it return -EWOULDBLOCK if an RPC is underway that might change the
stateid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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This commit is contained in:

Trond Myklebust 2013-03-16 20:54:34 -04:00

parent 9b20614988

commit 5521abfdcf

3 changed files with 86 additions and 14 deletions

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4

fs/nfs/nfs4_fs.h

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64

fs/nfs/nfs4proc.c

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32

fs/nfs/nfs4state.c

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