ANDROID: sdcardfs: Copy meta-data from lower inode

From wrapfs commit 3ee9b365e38c ("Wrapfs: properly copy meta-data after
AIO operations from lower inode")

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Bug: 35766959
Change-Id: I9a789222e27a17b8d85ce61c45397d1839f9a675

diff --git a/fs/sdcardfs/file.c b/fs/sdcardfs/file.c
index 1f6921e..6076c34 100644 (file)
--- a/fs/sdcardfs/file.c
+++ b/fs/sdcardfs/file.c
@@ -358,9 +358,12 @@ ssize_t sdcardfs_read_iter(struct kiocb *iocb, struct iov_iter *iter)
        get_file(lower_file); /* prevent lower_file from being released */
        iocb->ki_filp = lower_file;
        err = lower_file->f_op->read_iter(iocb, iter);
-       /* ? wait IO finish to update atime as ecryptfs ? */
        iocb->ki_filp = file;
        fput(lower_file);
+       /* update upper inode atime as needed */
+       if (err >= 0 || err == -EIOCBQUEUED)
+               fsstack_copy_attr_atime(file->f_path.dentry->d_inode,
+                                       file_inode(lower_file));
 out:
        return err;
 }
@@ -384,6 +387,13 @@ ssize_t sdcardfs_write_iter(struct kiocb *iocb, struct iov_iter *iter)
        err = lower_file->f_op->write_iter(iocb, iter);
        iocb->ki_filp = file;
        fput(lower_file);
+       /* update upper inode times/sizes as needed */
+       if (err >= 0 || err == -EIOCBQUEUED) {
+               fsstack_copy_inode_size(file->f_path.dentry->d_inode,
+                                       file_inode(lower_file));
+               fsstack_copy_attr_times(file->f_path.dentry->d_inode,
+                                       file_inode(lower_file));
+       }
 out:
        return err;
 }