Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 261 insertions, 0 deletions

diff --git a/net/rxrpc/krxiod.c b/net/rxrpc/krxiod.c
new file mode 100644
index 00000000000..2b537f425a1
--- /dev/null
+++ b/net/rxrpc/krxiod.c
@@ -0,0 +1,261 @@
+/* krxiod.c: Rx I/O daemon
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <rxrpc/krxiod.h>
+#include <rxrpc/transport.h>
+#include <rxrpc/peer.h>
+#include <rxrpc/call.h>
+#include "internal.h"
+
+static DECLARE_WAIT_QUEUE_HEAD(rxrpc_krxiod_sleepq);
+static DECLARE_COMPLETION(rxrpc_krxiod_dead);
+
+static atomic_t rxrpc_krxiod_qcount = ATOMIC_INIT(0);
+
+static LIST_HEAD(rxrpc_krxiod_transportq);
+static DEFINE_SPINLOCK(rxrpc_krxiod_transportq_lock);
+
+static LIST_HEAD(rxrpc_krxiod_callq);
+static DEFINE_SPINLOCK(rxrpc_krxiod_callq_lock);
+
+static volatile int rxrpc_krxiod_die;
+
+/*****************************************************************************/
+/*
+ * Rx I/O daemon
+ */
+static int rxrpc_krxiod(void *arg)
+{
+	DECLARE_WAITQUEUE(krxiod,current);
+
+	printk("Started krxiod %d\n",current->pid);
+
+	daemonize("krxiod");
+
+	/* loop around waiting for work to do */
+	do {
+		/* wait for work or to be told to exit */
+		_debug("### Begin Wait");
+		if (!atomic_read(&rxrpc_krxiod_qcount)) {
+			set_current_state(TASK_INTERRUPTIBLE);
+
+			add_wait_queue(&rxrpc_krxiod_sleepq, &krxiod);
+
+			for (;;) {
+				set_current_state(TASK_INTERRUPTIBLE);
+				if (atomic_read(&rxrpc_krxiod_qcount) ||
+				    rxrpc_krxiod_die ||
+				    signal_pending(current))
+					break;
+
+				schedule();
+			}
+
+			remove_wait_queue(&rxrpc_krxiod_sleepq, &krxiod);
+			set_current_state(TASK_RUNNING);
+		}
+		_debug("### End Wait");
+
+		/* do work if been given some to do */
+		_debug("### Begin Work");
+
+		/* see if there's a transport in need of attention */
+		if (!list_empty(&rxrpc_krxiod_transportq)) {
+			struct rxrpc_transport *trans = NULL;
+
+			spin_lock_irq(&rxrpc_krxiod_transportq_lock);
+
+			if (!list_empty(&rxrpc_krxiod_transportq)) {
+				trans = list_entry(
+					rxrpc_krxiod_transportq.next,
+					struct rxrpc_transport,
+					krxiodq_link);
+
+				list_del_init(&trans->krxiodq_link);
+				atomic_dec(&rxrpc_krxiod_qcount);
+
+				/* make sure it hasn't gone away and doesn't go
+				 * away */
+				if (atomic_read(&trans->usage)>0)
+					rxrpc_get_transport(trans);
+				else
+					trans = NULL;
+			}
+
+			spin_unlock_irq(&rxrpc_krxiod_transportq_lock);
+
+			if (trans) {
+				rxrpc_trans_receive_packet(trans);
+				rxrpc_put_transport(trans);
+			}
+		}
+
+		/* see if there's a call in need of attention */
+		if (!list_empty(&rxrpc_krxiod_callq)) {
+			struct rxrpc_call *call = NULL;
+
+			spin_lock_irq(&rxrpc_krxiod_callq_lock);
+
+			if (!list_empty(&rxrpc_krxiod_callq)) {
+				call = list_entry(rxrpc_krxiod_callq.next,
+						  struct rxrpc_call,
+						  rcv_krxiodq_lk);
+				list_del_init(&call->rcv_krxiodq_lk);
+				atomic_dec(&rxrpc_krxiod_qcount);
+
+				/* make sure it hasn't gone away and doesn't go
+				 * away */
+				if (atomic_read(&call->usage) > 0) {
+					_debug("@@@ KRXIOD"
+					       " Begin Attend Call %p", call);
+					rxrpc_get_call(call);
+				}
+				else {
+					call = NULL;
+				}
+			}
+
+			spin_unlock_irq(&rxrpc_krxiod_callq_lock);
+
+			if (call) {
+				rxrpc_call_do_stuff(call);
+				rxrpc_put_call(call);
+				_debug("@@@ KRXIOD End Attend Call %p", call);
+			}
+		}
+
+		_debug("### End Work");
+
+		try_to_freeze(PF_FREEZE);
+
+                /* discard pending signals */
+		rxrpc_discard_my_signals();
+
+	} while (!rxrpc_krxiod_die);
+
+	/* and that's all */
+	complete_and_exit(&rxrpc_krxiod_dead, 0);
+
+} /* end rxrpc_krxiod() */
+
+/*****************************************************************************/
+/*
+ * start up a krxiod daemon
+ */
+int __init rxrpc_krxiod_init(void)
+{
+	return kernel_thread(rxrpc_krxiod, NULL, 0);
+
+} /* end rxrpc_krxiod_init() */
+
+/*****************************************************************************/
+/*
+ * kill the krxiod daemon and wait for it to complete
+ */
+void rxrpc_krxiod_kill(void)
+{
+	rxrpc_krxiod_die = 1;
+	wake_up_all(&rxrpc_krxiod_sleepq);
+	wait_for_completion(&rxrpc_krxiod_dead);
+
+} /* end rxrpc_krxiod_kill() */
+
+/*****************************************************************************/
+/*
+ * queue a transport for attention by krxiod
+ */
+void rxrpc_krxiod_queue_transport(struct rxrpc_transport *trans)
+{
+	unsigned long flags;
+
+	_enter("");
+
+	if (list_empty(&trans->krxiodq_link)) {
+		spin_lock_irqsave(&rxrpc_krxiod_transportq_lock, flags);
+
+		if (list_empty(&trans->krxiodq_link)) {
+			if (atomic_read(&trans->usage) > 0) {
+				list_add_tail(&trans->krxiodq_link,
+					      &rxrpc_krxiod_transportq);
+				atomic_inc(&rxrpc_krxiod_qcount);
+			}
+		}
+
+		spin_unlock_irqrestore(&rxrpc_krxiod_transportq_lock, flags);
+		wake_up_all(&rxrpc_krxiod_sleepq);
+	}
+
+	_leave("");
+
+} /* end rxrpc_krxiod_queue_transport() */
+
+/*****************************************************************************/
+/*
+ * dequeue a transport from krxiod's attention queue
+ */
+void rxrpc_krxiod_dequeue_transport(struct rxrpc_transport *trans)
+{
+	unsigned long flags;
+
+	_enter("");
+
+	spin_lock_irqsave(&rxrpc_krxiod_transportq_lock, flags);
+	if (!list_empty(&trans->krxiodq_link)) {
+		list_del_init(&trans->krxiodq_link);
+		atomic_dec(&rxrpc_krxiod_qcount);
+	}
+	spin_unlock_irqrestore(&rxrpc_krxiod_transportq_lock, flags);
+
+	_leave("");
+
+} /* end rxrpc_krxiod_dequeue_transport() */
+
+/*****************************************************************************/
+/*
+ * queue a call for attention by krxiod
+ */
+void rxrpc_krxiod_queue_call(struct rxrpc_call *call)
+{
+	unsigned long flags;
+
+	if (list_empty(&call->rcv_krxiodq_lk)) {
+		spin_lock_irqsave(&rxrpc_krxiod_callq_lock, flags);
+		if (atomic_read(&call->usage) > 0) {
+			list_add_tail(&call->rcv_krxiodq_lk,
+				      &rxrpc_krxiod_callq);
+			atomic_inc(&rxrpc_krxiod_qcount);
+		}
+		spin_unlock_irqrestore(&rxrpc_krxiod_callq_lock, flags);
+	}
+	wake_up_all(&rxrpc_krxiod_sleepq);
+
+} /* end rxrpc_krxiod_queue_call() */
+
+/*****************************************************************************/
+/*
+ * dequeue a call from krxiod's attention queue
+ */
+void rxrpc_krxiod_dequeue_call(struct rxrpc_call *call)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&rxrpc_krxiod_callq_lock, flags);
+	if (!list_empty(&call->rcv_krxiodq_lk)) {
+		list_del_init(&call->rcv_krxiodq_lk);
+		atomic_dec(&rxrpc_krxiod_qcount);
+	}
+	spin_unlock_irqrestore(&rxrpc_krxiod_callq_lock, flags);
+
+} /* end rxrpc_krxiod_dequeue_call() */