From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Tue, 19 Dec 2006 23:25:52 +0000 (-0800)
Subject: ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6c2aad0567e693f9588d0a0683f96ed872fb4641;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime()

This can come from NFSD.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
---

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index a50447d461e5..10953a508f2f 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -149,6 +149,17 @@ int ocfs2_should_update_atime(struct inode *inode,
 	    ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
 		return 0;
 
+	/*
+	 * We can be called with no vfsmnt structure - NFSD will
+	 * sometimes do this.
+	 *
+	 * Note that our action here is different than touch_atime() -
+	 * if we can't tell whether this is a noatime mount, then we
+	 * don't know whether to trust the value of s_atime_quantum.
+	 */
+	if (vfsmnt == NULL)
+		return 0;
+
 	if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
 	    ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
 		return 0;