Commit c15cddd9 authored May 23, 2013 by Paul Taysom Committed by Tyler Hicks May 24, 2013

ecryptfs: fixed msync to flush data

When msync is called on a memory mapped file, that
data is not flushed to the disk.

In Linux, msync calls fsync for the file. For ecryptfs,
fsync just calls the lower level file system's fsync.
Changed the ecryptfs fsync code to call filemap_write_and_wait
before calling the lower level fsync.

Addresses the problem described in http://crbug.com/239536



Signed-off-by: Paul Taysom <taysom@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Cc: stable@vger.kernel.org # v3.6+

parent bb3ec6b0

fs/ecryptfs/file.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -295,6 +295,7 @@ static int ecryptfs_release(struct inode inode, struct file file)
		static int
		ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
		{
		filemap_write_and_wait(file->f_mapping);
		return vfs_fsync(ecryptfs_file_to_lower(file), datasync);
		}

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