NFSD: Fix problem of COMMIT and NFS4ERR_DELAY in infinite loop
The following request sequence to the same file causes the NFS client and
server getting into an infinite loop with COMMIT and NFS4ERR_DELAY:
OPEN
REMOVE
WRITE
COMMIT
Problem reported by recall11, recall12, recall14, recall20, recall22,
recall40, recall42, recall48, recall50 of nfstest suite.
This patch restores the handling of race condition in nfsd_file_do_acquire
with unlink to that prior of the regression.
Fixes: ac3a2585f0
("nfsd: rework refcounting in filecache")
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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@ -1099,8 +1099,6 @@ open_file:
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* then unhash.
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*/
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if (status != nfs_ok || inode->i_nlink == 0)
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status = nfserr_jukebox;
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if (status != nfs_ok)
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nfsd_file_unhash(nf);
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clear_and_wake_up_bit(NFSD_FILE_PENDING, &nf->nf_flags);
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if (status == nfs_ok)
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