This is a note to let you know that I've just added the patch titled
NFSD: Refactor find_file()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-refactor-find_file.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 64bc8695bcf6cb65e29e3f119032864d352b35bf
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Fri Oct 28 10:47:47 2022 -0400
NFSD: Refactor find_file()
[ Upstream commit 15424748001a9b5ea62b3e6ad45f0a8b27f01df9 ]
find_file() is now the only caller of find_file_locked(), so just
fold these two together.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Reviewed-by: NeilBrown <neilb@xxxxxxx>
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 192e721525665..4f2ad5bf1f1b8 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4682,31 +4682,24 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
nfs4_put_stid(&last->st_stid);
}
-/* search file_hashtbl[] for file */
-static struct nfs4_file *
-find_file_locked(const struct svc_fh *fh, unsigned int hashval)
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_lookup(const struct svc_fh *fhp)
{
- struct nfs4_file *fp;
+ unsigned int hashval = file_hashval(fhp);
+ struct nfs4_file *fi;
- hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
- lockdep_is_held(&state_lock)) {
- if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
- if (refcount_inc_not_zero(&fp->fi_ref))
- return fp;
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash,
+ lockdep_is_held(&state_lock)) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref)) {
+ rcu_read_unlock();
+ return fi;
+ }
}
}
- return NULL;
-}
-
-static struct nfs4_file * find_file(struct svc_fh *fh)
-{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
-
- rcu_read_lock();
- fp = find_file_locked(fh, hashval);
rcu_read_unlock();
- return fp;
+ return NULL;
}
/*
@@ -4757,9 +4750,10 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
struct nfs4_file *fp;
__be32 ret = nfs_ok;
- fp = find_file(current_fh);
+ fp = nfsd4_file_hash_lookup(current_fh);
if (!fp)
return ret;
+
/* Check for conflicting share reservations */
spin_lock(&fp->fi_lock);
if (fp->fi_share_deny & deny_type)
