From: "Yan, Zheng" <zyan@redhat.com>
Date: Wed, 26 Jul 2017 12:07:51 +0800
Subject: ceph: don't fill readdir cache for LSSNAP reply
Git-commit: 8d45b911a9f106ec898ec531d5badba5df7c2748
Patch-mainline: v4.14-rc1
References: FATE#324714

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/ceph/inode.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 2c5db3686173..4c34e08e2d4f 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1516,15 +1516,18 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
 		     rinfo->dir_nr, parent);
 		if (rinfo->dir_dir)
 			ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
-	}
 
-	if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2 &&
-	    !(rinfo->hash_order && last_hash)) {
-		/* note dir version at start of readdir so we can tell
-		 * if any dentries get dropped */
-		req->r_dir_release_cnt = atomic64_read(&ci->i_release_count);
-		req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count);
-		req->r_readdir_cache_idx = 0;
+		if (ceph_frag_is_leftmost(frag) &&
+		    req->r_readdir_offset == 2 &&
+		    !(rinfo->hash_order && last_hash)) {
+			/* note dir version at start of readdir so we can
+			 * tell if any dentries get dropped */
+			req->r_dir_release_cnt =
+				atomic64_read(&ci->i_release_count);
+			req->r_dir_ordered_cnt =
+				atomic64_read(&ci->i_ordered_count);
+			req->r_readdir_cache_idx = 0;
+		}
 	}
 
 	cache_ctl.index = req->r_readdir_cache_idx;