From 5ea0aa29ad4b8bc96b8cfcfb367f04b50b9cf92f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 18 Feb 2021 21:02:07 -0500 Subject: [PATCH] nfsd: Don't keep looking up unhashed files in the nfsd file cache commit d30881f573e565ebb5dbb50b31ed6106b5c81328 upstream. If a file is unhashed, then we're going to reject it anyway and retry, so make sure we skip it when we're doing the RCU lockless lookup. This avoids a number of unnecessary nfserr_jukebox returns from nfsd_file_acquire() Fixes: 65294c1f2c5e ("nfsd: add a new struct file caching facility to nfsd") Signed-off-by: Trond Myklebust Signed-off-by: Chuck Lever Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/filecache.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 5849c1b..e5aad1c 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -897,6 +897,8 @@ nfsd_file_find_locked(struct inode *inode, unsigned int may_flags, continue; if (!nfsd_match_cred(nf->nf_cred, current_cred())) continue; + if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) + continue; if (nfsd_file_get(nf) != NULL) return nf; } -- 2.7.4