From: Yan, Zheng <zyan@redhat.com>
Date: Sat, 26 May 2018 08:54:39 +0000 (+0800)
Subject: ceph: prevent i_version from going back
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=aae1a442f8eac6d5442ee479df66d278c73a6ecc;p=linux.git

ceph: prevent i_version from going back

inode info from non-auth can be stale.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 4aeccb13437bd..4fda7a9d4c9d8 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -889,7 +889,8 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
 	}
 
 	/* finally update i_version */
-	ci->i_version = le64_to_cpu(info->version);
+	if (le64_to_cpu(info->version) > ci->i_version)
+		ci->i_version = le64_to_cpu(info->version);
 
 	inode->i_mapping->a_ops = &ceph_aops;