diff options
| -rw-r--r-- | fs/ocfs2/mmap.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index 51b02044768..af01158b39f 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -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); |