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authorPaul Taysom <taysom@chromium.org>2013-05-23 14:31:43 -0700
committerTyler Hicks <tyhicks@canonical.com>2013-05-24 16:21:45 -0700
commitc15cddd900e867c5adfb3c79596479dc5975f743 (patch)
treebc9607f2d1c40850da4c247d842dd1275c1785b5
parentbb3ec6b08396bbd631b6441102dd1c3d89cbc576 (diff)
downloadvexpress-lsk-c15cddd900e867c5adfb3c79596479dc5975f743.tar.gz
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+
-rw-r--r--fs/ecryptfs/file.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 201f0a0d6b0..16f509d6fa4 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -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);
}