fuse: fix "direct_io" private mmap

MAP_PRIVATE mmap could return stale data from the cache for "direct_io" files. Fix this by flushing the cache on mmap. Found with a slightly modified fsx-linux. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
xanmod · Apr 9, 2009 · 3121bfe · 3121bfe
1 parent ce60a2f
commit 3121bfe
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
@@ -1298,6 +1298,8 @@ static int fuse_direct_mmap(struct file *file, struct vm_area_struct *vma)
 	if (vma->vm_flags & VM_MAYSHARE)
 		return -ENODEV;
 
+	invalidate_inode_pages2(file->f_mapping);
+
 	return generic_file_mmap(file, vma);
 }