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Commit 89488984 authored by Mark Fasheh's avatar Mark Fasheh
Browse files

ocfs2: Turn off shared writeable mmap for local files systems with holes. 



This will be turned back on once we can do allocation in ->page_mkwrite().

Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
parent abf8b156

fs/ocfs2/mmap.c

+5 −2
Original line number Diff line number Diff line
@@ -85,8 +85,11 @@ int ocfs2_mmap(struct file *file, struct vm_area_struct *vma) 
	int ret = 0, lock_level = 0;

	struct ocfs2_super *osb = OCFS2_SB(file->f_dentry->d_inode->i_sb);



	/* We don't want to support shared writable mappings yet. */

	if (!ocfs2_mount_local(osb) &&

	/*

	 * Only support shared writeable mmap for local mounts which

	 * don't know about holes.

	 */

	if ((!ocfs2_mount_local(osb) || ocfs2_sparse_alloc(osb)) &&

	    ((vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_MAYSHARE)) &&

	    ((vma->vm_flags & VM_WRITE) || (vma->vm_flags & VM_MAYWRITE))) {

		mlog(0, "disallow shared writable mmaps %lx\n", vma->vm_flags);