static int bus1_fop_mmap(struct file *file, struct vm_area_struct *vma)
{
struct bus1_peer *peer = file->private_data;
struct bus1_pool *pool;
int r;
if (!bus1_peer_acquire(peer))
return -ESHUTDOWN;
pool = &bus1_peer_dereference(peer)->pool;
if (vma->vm_flags & VM_WRITE) {
/* deny write access to the pool */
r = -EPERM;
} else {
/* replace the connection file with our shmem file */
if (vma->vm_file)
fput(vma->vm_file);
vma->vm_file = get_file(pool->f);
vma->vm_flags &= ~VM_MAYWRITE;
/* calls into shmem_mmap(), which simply sets vm_ops */
r = pool->f->f_op->mmap(pool->f, vma);
}
bus1_peer_release(peer);
return r;
}
static long bus1_fop_ioctl(struct file *file,
unsigned int cmd,
unsigned long arg)
{
struct bus1_peer *peer = file->private_data;
int r;
switch (cmd) {
case BUS1_CMD_PEER_INIT:
return bus1_peer_ioctl_init(peer, arg);
case BUS1_CMD_PEER_QUERY:
case BUS1_CMD_PEER_RESET:
case BUS1_CMD_PEER_CLONE:
case BUS1_CMD_NODE_DESTROY:
case BUS1_CMD_HANDLE_RELEASE:
case BUS1_CMD_SLICE_RELEASE:
case BUS1_CMD_SEND:
case BUS1_CMD_RECV:
if (bus1_active_is_new(&peer->active))
return -ENOTCONN;
if (!bus1_peer_acquire(peer))
return -ESHUTDOWN;
r = bus1_peer_ioctl(peer, file, cmd, arg);
bus1_peer_release(peer);
return r;
}
return -ENOTTY;
}
static long bus1_fop_ioctl(struct file *file,
unsigned int cmd,
unsigned long arg)
{
struct bus1_peer *peer = file->private_data;
int r;
if (!bus1_peer_acquire(peer))
return -ESHUTDOWN;
r = bus1_peer_ioctl(peer, cmd, arg);
bus1_peer_release(peer);
return r;
}
