From 18fc8abdb7537bf841a65ce06a33977c109acc92 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 28 Oct 2016 21:52:50 -0400
Subject: ceph: unify dentry_operations instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/ceph/dir.c   | 30 +++---------------------------
 fs/ceph/inode.c |  9 +++++----
 fs/ceph/super.c |  1 +
 fs/ceph/super.h |  3 +--
 4 files changed, 10 insertions(+), 33 deletions(-)

(limited to 'fs')

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 78180d151730..80f5339d097b 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -50,13 +50,6 @@ int ceph_init_dentry(struct dentry *dentry)
 		goto out_unlock;
 	}
 
-	if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_NOSNAP)
-		d_set_d_op(dentry, &ceph_dentry_ops);
-	else if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR)
-		d_set_d_op(dentry, &ceph_snapdir_dentry_ops);
-	else
-		d_set_d_op(dentry, &ceph_snap_dentry_ops);
-
 	di->dentry = dentry;
 	di->lease_session = NULL;
 	di->time = jiffies;
@@ -1319,16 +1312,6 @@ static void ceph_d_release(struct dentry *dentry)
 	kmem_cache_free(ceph_dentry_cachep, di);
 }
 
-static int ceph_snapdir_d_revalidate(struct dentry *dentry,
-					  unsigned int flags)
-{
-	/*
-	 * Eventually, we'll want to revalidate snapped metadata
-	 * too... probably...
-	 */
-	return 1;
-}
-
 /*
  * When the VFS prunes a dentry from the cache, we need to clear the
  * complete flag on the parent directory.
@@ -1347,6 +1330,9 @@ static void ceph_d_prune(struct dentry *dentry)
 	if (d_unhashed(dentry))
 		return;
 
+	if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR)
+		return;
+
 	/*
 	 * we hold d_lock, so d_parent is stable, and d_fsdata is never
 	 * cleared until d_release
@@ -1518,13 +1504,3 @@ const struct dentry_operations ceph_dentry_ops = {
 	.d_release = ceph_d_release,
 	.d_prune = ceph_d_prune,
 };
-
-const struct dentry_operations ceph_snapdir_dentry_ops = {
-	.d_revalidate = ceph_snapdir_d_revalidate,
-	.d_release = ceph_d_release,
-};
-
-const struct dentry_operations ceph_snap_dentry_ops = {
-	.d_release = ceph_d_release,
-	.d_prune = ceph_d_prune,
-};
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index bca1b49c1c4b..29fcbee2d416 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1023,16 +1023,17 @@ static void update_dentry_lease(struct dentry *dentry,
 	long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
 	struct inode *dir;
 
-	/* only track leases on regular dentries */
-	if (dentry->d_op != &ceph_dentry_ops)
-		return;
-
 	spin_lock(&dentry->d_lock);
 	dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
 	     dentry, duration, ttl);
 
 	/* make lease_rdcache_gen match directory */
 	dir = d_inode(dentry->d_parent);
+
+	/* only track leases on regular dentries */
+	if (ceph_snap(dir) != CEPH_NOSNAP)
+		goto out_unlock;
+
 	di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
 
 	if (duration == 0)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index a29ffce98187..0617580b2508 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -877,6 +877,7 @@ static int ceph_set_super(struct super_block *s, void *data)
 	fsc->sb = s;
 
 	s->s_op = &ceph_super_ops;
+	s->s_d_op = &ceph_dentry_ops;
 	s->s_export_op = &ceph_export_ops;
 
 	s->s_time_gran = 1000;  /* 1000 ns == 1 us */
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 3e3fa9163059..26a5a5d6bf36 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -934,8 +934,7 @@ extern const struct file_operations ceph_dir_fops;
 extern const struct file_operations ceph_snapdir_fops;
 extern const struct inode_operations ceph_dir_iops;
 extern const struct inode_operations ceph_snapdir_iops;
-extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
-	ceph_snapdir_dentry_ops;
+extern const struct dentry_operations ceph_dentry_ops;
 
 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
-- 
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