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nfsd: fix filecache lookup

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If the lookup keeps finding a nfsd_file with an unhashed open file,
then retry once only.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org
Fixes: 65294c1f2c "nfsd: add a new struct file caching facility to nfsd"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2020-01-06 13:18:03 -05:00 committed by J. Bruce Fields
parent e44b4bf264
commit 28c7d86bb6
1 changed files with 6 additions and 0 deletions
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6
fs/nfsd/filecache.c
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@ -789,6 +789,7 @@ nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct nfsd_file *nf, *new;
struct inode *inode;
unsigned int hashval;
bool retry = true;
/* FIXME: skip this if fh_dentry is already set? */
status = fh_verify(rqstp, fhp, S_IFREG,
@ -824,6 +825,11 @@ wait_for_construction:
/* Did construction of this file fail? */
if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
if (!retry) {
status = nfserr_jukebox;
goto out;
}
retry = false;
nfsd_file_put_noref(nf);
goto retry;
}