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-rw-r--r--fs/inode.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/fs/inode.c b/fs/inode.c
index 04536eb..bf21dc6 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1177,13 +1177,27 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
return;
if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
return;
+
+ if (mnt->mnt_flags & MNT_RELATIME) {
+ /*
+ * With relative atime, only update atime if the
+ * previous atime is earlier than either the ctime or
+ * mtime.
+ */
+ if (timespec_compare(&inode->i_mtime,
+ &inode->i_atime) < 0 &&
+ timespec_compare(&inode->i_ctime,
+ &inode->i_atime) < 0)
+ return;
+ }
}
now = current_fs_time(inode->i_sb);
- if (!timespec_equal(&inode->i_atime, &now)) {
- inode->i_atime = now;
- mark_inode_dirty_sync(inode);
- }
+ if (timespec_equal(&inode->i_atime, &now))
+ return;
+
+ inode->i_atime = now;
+ mark_inode_dirty_sync(inode);
}
EXPORT_SYMBOL(touch_atime);
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