From b97bf3fd8f6a16966d4f18983b2c40993ff937d4 Mon Sep 17 00:00:00 2001 From: Per Liden Date: Mon, 2 Jan 2006 19:04:38 +0100 Subject: [TIPC] Initial merge TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden --- net/tipc/handler.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 net/tipc/handler.c (limited to 'net/tipc/handler.c') diff --git a/net/tipc/handler.c b/net/tipc/handler.c new file mode 100644 index 000000000000..c8fbb2071dfc --- /dev/null +++ b/net/tipc/handler.c @@ -0,0 +1,129 @@ +/* + * net/tipc/handler.c: TIPC signal handling + * + * Copyright (c) 2003-2005, Ericsson Research Canada + * Copyright (c) 2005, Wind River Systems + * Copyright (c) 2005-2006, Ericsson AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "core.h" + +struct queue_item { + struct list_head next_signal; + void (*handler) (unsigned long); + unsigned long data; +}; + +static kmem_cache_t *tipc_queue_item_cache; +static struct list_head signal_queue_head; +static spinlock_t qitem_lock = SPIN_LOCK_UNLOCKED; +static int handler_enabled = 0; + +static void process_signal_queue(unsigned long dummy); + +static DECLARE_TASKLET_DISABLED(tipc_tasklet, process_signal_queue, 0); + + +unsigned int k_signal(Handler routine, unsigned long argument) +{ + struct queue_item *item; + + if (!handler_enabled) { + err("Signal request ignored by handler\n"); + return -ENOPROTOOPT; + } + + spin_lock_bh(&qitem_lock); + item = kmem_cache_alloc(tipc_queue_item_cache, GFP_ATOMIC); + if (!item) { + err("Signal queue out of memory\n"); + spin_unlock_bh(&qitem_lock); + return -ENOMEM; + } + item->handler = routine; + item->data = argument; + list_add_tail(&item->next_signal, &signal_queue_head); + spin_unlock_bh(&qitem_lock); + tasklet_schedule(&tipc_tasklet); + return 0; +} + +static void process_signal_queue(unsigned long dummy) +{ + struct queue_item *__volatile__ item; + struct list_head *l, *n; + + spin_lock_bh(&qitem_lock); + list_for_each_safe(l, n, &signal_queue_head) { + item = list_entry(l, struct queue_item, next_signal); + list_del(&item->next_signal); + spin_unlock_bh(&qitem_lock); + item->handler(item->data); + spin_lock_bh(&qitem_lock); + kmem_cache_free(tipc_queue_item_cache, item); + } + spin_unlock_bh(&qitem_lock); +} + +int handler_start(void) +{ + tipc_queue_item_cache = + kmem_cache_create("tipc_queue_items", sizeof(struct queue_item), + 0, SLAB_HWCACHE_ALIGN, NULL, NULL); + if (!tipc_queue_item_cache) + return -ENOMEM; + + INIT_LIST_HEAD(&signal_queue_head); + tasklet_enable(&tipc_tasklet); + handler_enabled = 1; + return 0; +} + +void handler_stop(void) +{ + struct list_head *l, *n; + struct queue_item *item; + + if (!handler_enabled) + return; + + handler_enabled = 0; + tasklet_disable(&tipc_tasklet); + tasklet_kill(&tipc_tasklet); + + spin_lock_bh(&qitem_lock); + list_for_each_safe(l, n, &signal_queue_head) { + item = list_entry(l, struct queue_item, next_signal); + list_del(&item->next_signal); + kmem_cache_free(tipc_queue_item_cache, item); + } + spin_unlock_bh(&qitem_lock); + + kmem_cache_destroy(tipc_queue_item_cache); +} + -- cgit v1.2.3 From 9ea1fd3c1a15c620d1e3d0aa269d34b705477003 Mon Sep 17 00:00:00 2001 From: Per Liden Date: Wed, 11 Jan 2006 13:30:43 +0100 Subject: [TIPC] License header update The license header in each file now more clearly state that this code is licensed under a dual BSD/GPL. Before this was only evident if you looked at the MODULE_LICENSE line in core.c. Signed-off-by: Per Liden --- net/tipc/handler.c | 42 +++++++++++++++++++++++------------------- 1 file changed, 23 insertions(+), 19 deletions(-) (limited to 'net/tipc/handler.c') diff --git a/net/tipc/handler.c b/net/tipc/handler.c index c8fbb2071dfc..8f5dcbd4cd3a 100644 --- a/net/tipc/handler.c +++ b/net/tipc/handler.c @@ -6,28 +6,32 @@ * Copyright (c) 2005-2006, Ericsson AB * All rights reserved. * - * Redistribution and use in source and binary forms, with or without + * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * - * Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * Neither the names of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from this - * software without specific prior written permission. + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ -- cgit v1.2.3 From 9da1c8b694f8e72a16f259614caaae50cbcdaf10 Mon Sep 17 00:00:00 2001 From: Per Liden Date: Wed, 11 Jan 2006 18:40:41 +0100 Subject: [TIPC] Update of file headers The copyright statements from different parts of Ericsson have been merged into one. Signed-off-by: Per Liden --- net/tipc/handler.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'net/tipc/handler.c') diff --git a/net/tipc/handler.c b/net/tipc/handler.c index 8f5dcbd4cd3a..cab6f6150460 100644 --- a/net/tipc/handler.c +++ b/net/tipc/handler.c @@ -1,9 +1,8 @@ /* * net/tipc/handler.c: TIPC signal handling * - * Copyright (c) 2003-2005, Ericsson Research Canada + * Copyright (c) 2003-2006, Ericsson AB * Copyright (c) 2005, Wind River Systems - * Copyright (c) 2005-2006, Ericsson AB * All rights reserved. * * Redistribution and use in source and binary forms, with or without -- cgit v1.2.3 From 593a5f22d8035b1396a958b6bbde9f13c0f09549 Mon Sep 17 00:00:00 2001 From: Per Liden Date: Wed, 11 Jan 2006 19:14:19 +0100 Subject: [TIPC] More updates of file headers Updated copyright notice to include the year the file was actually created. Information about file creation dates was extracted from the files in the old CVS repository at tipc.sourceforge.net. Signed-off-by: Per Liden --- net/tipc/handler.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/tipc/handler.c') diff --git a/net/tipc/handler.c b/net/tipc/handler.c index cab6f6150460..f320010f8a65 100644 --- a/net/tipc/handler.c +++ b/net/tipc/handler.c @@ -1,7 +1,7 @@ /* * net/tipc/handler.c: TIPC signal handling * - * Copyright (c) 2003-2006, Ericsson AB + * Copyright (c) 2000-2006, Ericsson AB * Copyright (c) 2005, Wind River Systems * All rights reserved. * -- cgit v1.2.3