Commit 64e6651d authored Sep 12, 2012 by Tyler Hicks

eCryptfs: Call lower ->flush() from ecryptfs_flush()



Since eCryptfs only calls fput() on the lower file in
ecryptfs_release(), eCryptfs should call the lower filesystem's
->flush() from ecryptfs_flush().

If the lower filesystem implements ->flush(), then eCryptfs should try
to flush out any dirty pages prior to calling the lower ->flush(). If
the lower filesystem does not implement ->flush(), then eCryptfs has no
need to do anything in ecryptfs_flush() since dirty pages are now
written out to the lower filesystem in ecryptfs_release().

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>

parent 7149f255

fs/ecryptfs/file.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -275,8 +275,14 @@ out:

		static int ecryptfs_flush(struct file *file, fl_owner_t td)
		{
		return file->f_mode & FMODE_WRITE
		? filemap_write_and_wait(file->f_mapping) : 0;
		struct file *lower_file = ecryptfs_file_to_lower(file);

		if (lower_file->f_op && lower_file->f_op->flush) {
		filemap_write_and_wait(file->f_mapping);
		return lower_file->f_op->flush(lower_file, td);
		}

		return 0;
		}

		static int ecryptfs_release(struct inode inode, struct file file)