[PATCH v2 041/117] nfsd: Add a struct nfs4_file field to struct nfs4_stid

[Jeff Layton <jlayton@primarydata.com>]

From: Trond Myklebust <trond.myklebust@primarydata.com>

All stateids are associated with a nfs4_file. Let's consolidate.
Start by replacing delegation->dl_file with the dl_stid.sc_file

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfsd/nfs4state.c | 18 +++++++++---------
 fs/nfsd/state.h     |  2 +-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index cad93b38f20b..40cce9303d46 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -640,6 +640,8 @@ static void remove_stid(struct nfs4_stid *s)
 
 static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
 {
+	if (s->sc_file)
+		put_nfs4_file(s->sc_file);
 	kmem_cache_free(slab, s);
 }
 
@@ -647,8 +649,6 @@ void
 nfs4_put_delegation(struct nfs4_delegation *dp)
 {
 	if (atomic_dec_and_test(&dp->dl_stid.sc_count)) {
-		if (dp->dl_file)
-			put_nfs4_file(dp->dl_file);
 		nfs4_free_stid(deleg_slab, &dp->dl_stid);
 		num_delegations--;
 	}
@@ -687,7 +687,7 @@ hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
 static void
 unhash_delegation_locked(struct nfs4_delegation *dp)
 {
-	struct nfs4_file *fp = dp->dl_file;
+	struct nfs4_file *fp = dp->dl_stid.sc_file;
 
 	lockdep_assert_held(&state_lock);
 
@@ -3087,8 +3087,8 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
 
 void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp)
 {
-	struct nfs4_client *clp = dp->dl_stid.sc_client;
-	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+	struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
+					  nfsd_net_id);
 
 	/*
 	 * We can't do this in nfsd_break_deleg_cb because it is
@@ -3436,14 +3436,14 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int f
 	fl->fl_flags = FL_DELEG;
 	fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
 	fl->fl_end = OFFSET_MAX;
-	fl->fl_owner = (fl_owner_t)(dp->dl_file);
+	fl->fl_owner = (fl_owner_t)(dp->dl_stid.sc_file);
 	fl->fl_pid = current->tgid;
 	return fl;
 }
 
 static int nfs4_setlease(struct nfs4_delegation *dp)
 {
-	struct nfs4_file *fp = dp->dl_file;
+	struct nfs4_file *fp = dp->dl_stid.sc_file;
 	struct file_lock *fl;
 	int status = 0;
 
@@ -3493,7 +3493,7 @@ static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
 	get_nfs4_file(fp);
 	spin_lock(&state_lock);
 	spin_lock(&fp->fi_lock);
-	dp->dl_file = fp;
+	dp->dl_stid.sc_file = fp;
 	if (!fp->fi_lease) {
 		spin_unlock(&fp->fi_lock);
 		spin_unlock(&state_lock);
@@ -4113,7 +4113,7 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
 		if (status)
 			goto out;
 		if (filpp) {
-			file = dp->dl_file->fi_deleg_file;
+			file = dp->dl_stid.sc_file->fi_deleg_file;
 			if (!file) {
 				WARN_ON_ONCE(1);
 				status = nfserr_serverfault;
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 561b94181751..46ac2d6a9d7a 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -84,6 +84,7 @@ struct nfs4_stid {
 	unsigned char sc_type;
 	stateid_t sc_stateid;
 	struct nfs4_client *sc_client;
+	struct nfs4_file *sc_file;
 };
 
 struct nfs4_delegation {
@@ -91,7 +92,6 @@ struct nfs4_delegation {
 	struct list_head	dl_perfile;
 	struct list_head	dl_perclnt;
 	struct list_head	dl_recall_lru;  /* delegation recalled */
-	struct nfs4_file	*dl_file;
 	u32			dl_type;
 	time_t			dl_time;
 /* For recall: */
-- 
1.9.3