/*
* Wakeup all sleepers and cleanup.
*/
int
xfs_devclose_common(dev_t dev, struct proc *proc)
{
struct xfs_channel *chan = &xfs_channel[minor(dev)];
struct xfs_link *first;
/* Sanity check, paranoia? */
if (!(chan->status & CHANNEL_OPENED))
panic("xfs_devclose never opened?");
chan->status &= ~CHANNEL_OPENED;
/* No one is going to read those messages so empty queue! */
while (!xfs_emptyq(&chan->messageq)) {
XFSDEB(XDEBDEV, ("before outq(messageq)\n"));
first = chan->messageq.next;
xfs_outq(first);
if (first->error_or_size != 0)
xfs_free(first, first->error_or_size);
XFSDEB(XDEBDEV, ("after outq(messageq)\n"));
}
/* Wakeup those waiting for replies that will never arrive. */
while (!xfs_emptyq(&chan->sleepq)) {
XFSDEB(XDEBDEV, ("before outq(sleepq)\n"));
first = chan->sleepq.next;
xfs_outq(first);
first->error_or_size = ENODEV;
wakeup((caddr_t) first);
XFSDEB(XDEBDEV, ("after outq(sleepq)\n"));
}
if (chan->status & CHANNEL_WAITING)
wakeup((caddr_t) chan);
if (chan->message_buffer) {
xfs_free(chan->message_buffer, MAX_XMSG_SIZE);
chan->message_buffer = NULL;
}
/*
* Free all xfs nodes.
*/
if (xfs[minor(dev)].mp != NULL) {
if (xfs_vfs_busy(xfs[minor(dev)].mp, 0, NULL, proc)) {
XFSDEB(XDEBNODE, ("xfs_dev_close: vfs_busy() --> BUSY\n"));
return EBUSY;
}
free_all_xfs_nodes(&xfs[minor(dev)], FORCECLOSE, 0);
xfs_vfs_unbusy(xfs[minor(dev)].mp, proc);
}
return 0;
}
void
free_xfs_node(struct xfs_node *node)
{
struct xfs *xfsp = NNPFS_FROM_XNODE(node);
NNPFSDEB(XDEBNODE, ("free_xfs_node(%lx) (%d,%d,%d,%d)\n",
(unsigned long)node,
node->handle.a,
node->handle.b,
node->handle.c,
node->handle.d));
/* XXX Really need to put back dirty data first. */
if (DATA_FROM_XNODE(node)) {
vrele(DATA_FROM_XNODE(node));
DATA_FROM_XNODE(node) = NULL;
}
xfsp->nnodes--;
XNODE_TO_VNODE(node)->v_data = NULL;
if (node->rd_cred) {
crfree (node->rd_cred);
node->rd_cred = NULL;
}
if (node->wr_cred) {
crfree (node->wr_cred);
node->wr_cred = NULL;
}
xfs_free(node, sizeof(*node), M_NNPFS_NODE);
NNPFSDEB(XDEBNODE, ("free_xfs_node done\n"));
}
/*
* Move messages from kernel to user space.
*/
int
xfs_devread(dev_t dev, struct uio * uiop, int ioflag)
{
struct xfs_channel *chan = &xfs_channel[minor(dev)];
struct xfs_link *first;
int error = 0;
XFSDEB(XDEBDEV, ("xfs_devread dev = %d\n", dev));
XFSDEB(XDEBDEV, ("xfs_devread: m = %p, m->prev = %p, m->next = %p\n",
&chan->messageq, chan->messageq.prev, chan->messageq.next));
again:
if (!xfs_emptyq (&chan->messageq)) {
while (!xfs_emptyq (&chan->messageq)) {
/* Remove message */
first = chan->messageq.next;
XFSDEB(XDEBDEV, ("xfs_devread: first = %p, "
"first->prev = %p, first->next = %p\n",
first, first->prev, first->next));
XFSDEB(XDEBDEV, ("xfs_devread: message->size = %u\n",
first->message->size));
error = uiomove((caddr_t) first->message, first->message->size,
uiop);
if (error)
break;
xfs_outq(first);
if (first->error_or_size != 0)
xfs_free(first, first->error_or_size);
}
} else {
chan->status |= CHANNEL_WAITING;
if (tsleep((caddr_t) chan, (PZERO + 1) | PCATCH, "xfsr", 0)) {
XFSDEB(XDEBMSG, ("caught signal xfs_devread\n"));
error = EINTR;
} else if ((chan->status & CHANNEL_WAITING) == 0) {
goto again;
} else
error = EIO;
}
XFSDEB(XDEBDEV, ("xfs_devread done error = %d\n", error));
return error;
}
/*
* Send a message to user space and wait for reply.
*/
int
xfs_message_rpc(int fd, struct xfs_message_header * message, u_int size)
{
int ret;
struct xfs_channel *chan = &xfs_channel[fd];
struct xfs_link *this_message;
struct xfs_link *this_process;
struct xfs_message_header *msg;
#if defined(HAVE_STRUCT_PROC_P_SIGMASK)
sigset_t oldsigmask;
#endif /* HAVE_STRUCT_PROC_P_SIGMASK */
XFSDEB(XDEBMSG, ("xfs_message_rpc opcode = %d\n", message->opcode));
if (!(chan->status & CHANNEL_OPENED)) /* No receiver? */
return ENODEV;
if (size < sizeof(struct xfs_message_wakeup)) {
printf("XFS PANIC Error: Message to small to receive wakeup, opcode = %d\n", message->opcode);
return ENOMEM;
}
this_message = xfs_alloc(sizeof(struct xfs_link));
this_process = xfs_alloc(sizeof(struct xfs_link));
msg = xfs_alloc(size);
bcopy(message, msg, size);
msg->size = size;
msg->sequence_num = chan->nsequence++;
this_message->error_or_size = 0;
this_message->message = msg;
this_process->message = msg;
xfs_appendq(&chan->messageq, this_message);
xfs_appendq(&chan->sleepq, this_process);
xfs_select_wakeup(chan);
this_process->error_or_size = 0;
if (chan->status & CHANNEL_WAITING) {
chan->status &= ~CHANNEL_WAITING;
wakeup((caddr_t) chan);
}
/*
* Remove SIGIO from the sigmask so no IO will
* wake us up from tsleep()
*/
#ifdef HAVE_STRUCT_PROC_P_SIGMASK
oldsigmask = xfs_curproc()->p_sigmask;
#ifdef __sigaddset
__sigaddset(&xfs_curproc()->p_sigmask, SIGIO);
#else
xfs_curproc()->p_sigmask |= sigmask(SIGIO);
#endif /* __sigaddset */
#elif defined(HAVE_STRUCT_PROC_P_SIGWAITMASK)
oldsigmask = xfs_curproc()->p_sigwaitmask;
sigaddset(&xfs_curproc()->p_sigwaitmask, SIGIO);
#endif
/*
* We have to check if we have a receiver here too because the
* daemon could have terminated before we sleep. This seems to
* happen sometimes when rebooting.
*/
if (!(chan->status & CHANNEL_OPENED) ||
tsleep((caddr_t) this_process, (PZERO + 1) | PCATCH, "xfs", 0)) {
XFSDEB(XDEBMSG, ("caught signal\n"));
this_process->error_or_size = EINTR;
}
#ifdef HAVE_STRUCT_PROC_P_SIGMASK
xfs_curproc()->p_sigmask = oldsigmask;
#elif defined(HAVE_STRUCT_PROC_P_SIGWAITMASK)
xfs_curproc()->p_sigwaitmask = oldsigmask;
#endif
/*
* Caught signal, got reply message or device was closed.
* Need to clean up both messageq and sleepq.
*/
if (xfs_onq(this_message)) {
xfs_outq(this_message);
}
if (xfs_onq(this_process)) {
xfs_outq(this_process);
}
ret = this_process->error_or_size;
XFSDEB(XDEBMSG, ("xfs_message_rpc this_process->error_or_size = %d\n",
this_process->error_or_size));
XFSDEB(XDEBMSG, ("xfs_message_rpc opcode ((xfs_message_wakeup*)(this_process->message))->error = %d\n", ((struct xfs_message_wakeup *) (this_process->message))->error));
bcopy(msg, message, size);
xfs_free(this_message, sizeof(*this_message));
xfs_free(this_process, sizeof(*this_process));
xfs_free(msg, size);
return ret;
}
