From: Chengguang Xu <cgxu519@gmx.com>
Date: Mon, 9 Jul 2018 22:17:31 +0800
Subject: ceph: add d_drop for some error cases in ceph_symlink()
Git-commit: 67fcd151400242757edbab710402161b2cd38989
Patch-mainline: v4.19-rc1
References: FATE#324714

When file num exceeds quota limit, should call d_drop to drop
dentry from cache as well.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/ceph/dir.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 4b6a49fd2a61..0210b02b86d4 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -885,8 +885,10 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
 	if (ceph_snap(dir) != CEPH_NOSNAP)
 		return -EROFS;
 
-	if (ceph_quota_is_max_files_exceeded(dir))
-		return -EDQUOT;
+	if (ceph_quota_is_max_files_exceeded(dir)) {
+		err = -EDQUOT;
+		goto out;
+	}
 
 	dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
 	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);