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![Harvey Harrison](/assets/img/avatar_default.png)
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
566 lines
13 KiB
C
566 lines
13 KiB
C
/*********************************************************************
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*
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* Filename: irias_object.c
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* Version: 0.3
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* Description: IAS object database and functions
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Thu Oct 1 22:50:04 1998
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* Modified at: Wed Dec 15 11:23:16 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Dag Brattli nor University of Tromsø admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#include <linux/string.h>
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#include <linux/socket.h>
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#include <linux/module.h>
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#include <net/irda/irda.h>
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#include <net/irda/irias_object.h>
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hashbin_t *irias_objects;
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/*
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* Used when a missing value needs to be returned
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*/
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struct ias_value irias_missing = { IAS_MISSING, 0, 0, 0, {0}};
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/*
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* Function ias_new_object (name, id)
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*
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* Create a new IAS object
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*
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*/
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struct ias_object *irias_new_object( char *name, int id)
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{
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struct ias_object *obj;
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IRDA_DEBUG( 4, "%s()\n", __func__);
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obj = kzalloc(sizeof(struct ias_object), GFP_ATOMIC);
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if (obj == NULL) {
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IRDA_WARNING("%s(), Unable to allocate object!\n",
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__func__);
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return NULL;
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}
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obj->magic = IAS_OBJECT_MAGIC;
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obj->name = kstrndup(name, IAS_MAX_CLASSNAME, GFP_ATOMIC);
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if (!obj->name) {
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IRDA_WARNING("%s(), Unable to allocate name!\n",
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__func__);
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kfree(obj);
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return NULL;
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}
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obj->id = id;
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/* Locking notes : the attrib spinlock has lower precendence
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* than the objects spinlock. Never grap the objects spinlock
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* while holding any attrib spinlock (risk of deadlock). Jean II */
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obj->attribs = hashbin_new(HB_LOCK);
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if (obj->attribs == NULL) {
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IRDA_WARNING("%s(), Unable to allocate attribs!\n",
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__func__);
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kfree(obj->name);
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kfree(obj);
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return NULL;
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}
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return obj;
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}
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EXPORT_SYMBOL(irias_new_object);
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/*
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* Function irias_delete_attrib (attrib)
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*
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* Delete given attribute and deallocate all its memory
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*
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*/
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static void __irias_delete_attrib(struct ias_attrib *attrib)
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{
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IRDA_ASSERT(attrib != NULL, return;);
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IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
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kfree(attrib->name);
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irias_delete_value(attrib->value);
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attrib->magic = ~IAS_ATTRIB_MAGIC;
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kfree(attrib);
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}
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void __irias_delete_object(struct ias_object *obj)
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{
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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kfree(obj->name);
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hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
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obj->magic = ~IAS_OBJECT_MAGIC;
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kfree(obj);
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}
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/*
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* Function irias_delete_object (obj)
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*
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* Remove object from hashbin and deallocate all attributes associated with
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* with this object and the object itself
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*
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*/
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int irias_delete_object(struct ias_object *obj)
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{
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struct ias_object *node;
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IRDA_ASSERT(obj != NULL, return -1;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
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/* Remove from list */
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node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
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if (!node)
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IRDA_DEBUG( 0, "%s(), object already removed!\n",
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__func__);
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/* Destroy */
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__irias_delete_object(obj);
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return 0;
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}
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EXPORT_SYMBOL(irias_delete_object);
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/*
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* Function irias_delete_attrib (obj)
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*
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* Remove attribute from hashbin and, if it was the last attribute of
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* the object, remove the object as well.
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*
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*/
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int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
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int cleanobject)
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{
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struct ias_attrib *node;
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IRDA_ASSERT(obj != NULL, return -1;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
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IRDA_ASSERT(attrib != NULL, return -1;);
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/* Remove attribute from object */
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node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
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if (!node)
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return 0; /* Already removed or non-existent */
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/* Deallocate attribute */
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__irias_delete_attrib(node);
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/* Check if object has still some attributes, destroy it if none.
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* At first glance, this look dangerous, as the kernel reference
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* various IAS objects. However, we only use this function on
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* user attributes, not kernel attributes, so there is no risk
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* of deleting a kernel object this way. Jean II */
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node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
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if (cleanobject && !node)
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irias_delete_object(obj);
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return 0;
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}
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/*
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* Function irias_insert_object (obj)
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*
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* Insert an object into the LM-IAS database
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*
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*/
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void irias_insert_object(struct ias_object *obj)
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{
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
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}
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EXPORT_SYMBOL(irias_insert_object);
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/*
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* Function irias_find_object (name)
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*
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* Find object with given name
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*
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*/
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struct ias_object *irias_find_object(char *name)
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{
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IRDA_ASSERT(name != NULL, return NULL;);
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/* Unsafe (locking), object might change */
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return hashbin_lock_find(irias_objects, 0, name);
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}
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EXPORT_SYMBOL(irias_find_object);
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/*
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* Function irias_find_attrib (obj, name)
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*
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* Find named attribute in object
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*
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*/
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struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
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{
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struct ias_attrib *attrib;
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IRDA_ASSERT(obj != NULL, return NULL;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
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IRDA_ASSERT(name != NULL, return NULL;);
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attrib = hashbin_lock_find(obj->attribs, 0, name);
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if (attrib == NULL)
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return NULL;
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/* Unsafe (locking), attrib might change */
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return attrib;
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}
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/*
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* Function irias_add_attribute (obj, attrib)
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*
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* Add attribute to object
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*
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*/
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static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
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int owner)
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{
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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IRDA_ASSERT(attrib != NULL, return;);
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IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
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/* Set if attrib is owned by kernel or user space */
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attrib->value->owner = owner;
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hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
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}
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/*
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* Function irias_object_change_attribute (obj_name, attrib_name, new_value)
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*
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* Change the value of an objects attribute.
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*
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*/
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int irias_object_change_attribute(char *obj_name, char *attrib_name,
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struct ias_value *new_value)
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{
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struct ias_object *obj;
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struct ias_attrib *attrib;
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unsigned long flags;
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/* Find object */
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obj = hashbin_lock_find(irias_objects, 0, obj_name);
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if (obj == NULL) {
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IRDA_WARNING("%s: Unable to find object: %s\n", __func__,
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obj_name);
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return -1;
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}
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/* Slightly unsafe (obj might get removed under us) */
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spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
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/* Find attribute */
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attrib = hashbin_find(obj->attribs, 0, attrib_name);
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if (attrib == NULL) {
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IRDA_WARNING("%s: Unable to find attribute: %s\n",
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__func__, attrib_name);
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spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
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return -1;
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}
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if ( attrib->value->type != new_value->type) {
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IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
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__func__);
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spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
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return -1;
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}
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/* Delete old value */
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irias_delete_value(attrib->value);
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/* Insert new value */
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attrib->value = new_value;
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/* Success */
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spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
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return 0;
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}
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EXPORT_SYMBOL(irias_object_change_attribute);
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/*
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* Function irias_object_add_integer_attrib (obj, name, value)
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*
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* Add an integer attribute to an LM-IAS object
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*
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*/
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void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
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int owner)
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{
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struct ias_attrib *attrib;
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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IRDA_ASSERT(name != NULL, return;);
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attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
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if (attrib == NULL) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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return;
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}
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attrib->magic = IAS_ATTRIB_MAGIC;
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attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
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/* Insert value */
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attrib->value = irias_new_integer_value(value);
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if (!attrib->name || !attrib->value) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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if (attrib->value)
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irias_delete_value(attrib->value);
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kfree(attrib->name);
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kfree(attrib);
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return;
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}
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irias_add_attrib(obj, attrib, owner);
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}
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EXPORT_SYMBOL(irias_add_integer_attrib);
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/*
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* Function irias_add_octseq_attrib (obj, name, octet_seq, len)
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*
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* Add a octet sequence attribute to an LM-IAS object
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*
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*/
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void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
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int len, int owner)
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{
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struct ias_attrib *attrib;
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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IRDA_ASSERT(name != NULL, return;);
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IRDA_ASSERT(octets != NULL, return;);
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attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
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if (attrib == NULL) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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return;
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}
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attrib->magic = IAS_ATTRIB_MAGIC;
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attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
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attrib->value = irias_new_octseq_value( octets, len);
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if (!attrib->name || !attrib->value) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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if (attrib->value)
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irias_delete_value(attrib->value);
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kfree(attrib->name);
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kfree(attrib);
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return;
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}
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irias_add_attrib(obj, attrib, owner);
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}
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EXPORT_SYMBOL(irias_add_octseq_attrib);
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/*
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* Function irias_object_add_string_attrib (obj, string)
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*
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* Add a string attribute to an LM-IAS object
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*
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*/
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void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
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int owner)
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{
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struct ias_attrib *attrib;
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IRDA_ASSERT(obj != NULL, return;);
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IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
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IRDA_ASSERT(name != NULL, return;);
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IRDA_ASSERT(value != NULL, return;);
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attrib = kzalloc(sizeof( struct ias_attrib), GFP_ATOMIC);
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if (attrib == NULL) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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return;
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}
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attrib->magic = IAS_ATTRIB_MAGIC;
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attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
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attrib->value = irias_new_string_value(value);
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if (!attrib->name || !attrib->value) {
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IRDA_WARNING("%s: Unable to allocate attribute!\n",
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__func__);
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if (attrib->value)
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irias_delete_value(attrib->value);
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kfree(attrib->name);
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kfree(attrib);
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return;
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}
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irias_add_attrib(obj, attrib, owner);
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}
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EXPORT_SYMBOL(irias_add_string_attrib);
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/*
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* Function irias_new_integer_value (integer)
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*
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* Create new IAS integer value
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*
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*/
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struct ias_value *irias_new_integer_value(int integer)
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{
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struct ias_value *value;
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value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
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if (value == NULL) {
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IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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return NULL;
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}
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value->type = IAS_INTEGER;
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value->len = 4;
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value->t.integer = integer;
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return value;
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}
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EXPORT_SYMBOL(irias_new_integer_value);
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/*
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* Function irias_new_string_value (string)
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*
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* Create new IAS string value
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*
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* Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
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*/
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struct ias_value *irias_new_string_value(char *string)
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{
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struct ias_value *value;
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value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
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if (value == NULL) {
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IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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return NULL;
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}
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value->type = IAS_STRING;
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value->charset = CS_ASCII;
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value->t.string = kstrndup(string, IAS_MAX_STRING, GFP_ATOMIC);
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if (!value->t.string) {
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IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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kfree(value);
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return NULL;
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}
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value->len = strlen(value->t.string);
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return value;
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}
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|
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/*
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* Function irias_new_octseq_value (octets, len)
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*
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* Create new IAS octet-sequence value
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*
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* Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
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*/
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struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
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{
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struct ias_value *value;
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value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
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if (value == NULL) {
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IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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return NULL;
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}
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value->type = IAS_OCT_SEQ;
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/* Check length */
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if(len > IAS_MAX_OCTET_STRING)
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len = IAS_MAX_OCTET_STRING;
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value->len = len;
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value->t.oct_seq = kmemdup(octseq, len, GFP_ATOMIC);
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if (value->t.oct_seq == NULL){
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IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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kfree(value);
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return NULL;
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}
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return value;
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}
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|
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struct ias_value *irias_new_missing_value(void)
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{
|
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struct ias_value *value;
|
|
|
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value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
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if (value == NULL) {
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|
IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
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|
return NULL;
|
|
}
|
|
|
|
value->type = IAS_MISSING;
|
|
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
* Function irias_delete_value (value)
|
|
*
|
|
* Delete IAS value
|
|
*
|
|
*/
|
|
void irias_delete_value(struct ias_value *value)
|
|
{
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(value != NULL, return;);
|
|
|
|
switch (value->type) {
|
|
case IAS_INTEGER: /* Fallthrough */
|
|
case IAS_MISSING:
|
|
/* No need to deallocate */
|
|
break;
|
|
case IAS_STRING:
|
|
/* Deallocate string */
|
|
kfree(value->t.string);
|
|
break;
|
|
case IAS_OCT_SEQ:
|
|
/* Deallocate byte stream */
|
|
kfree(value->t.oct_seq);
|
|
break;
|
|
default:
|
|
IRDA_DEBUG(0, "%s(), Unknown value type!\n", __func__);
|
|
break;
|
|
}
|
|
kfree(value);
|
|
}
|
|
EXPORT_SYMBOL(irias_delete_value);
|