Linux-2.6.12-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!
This commit is contained in:
Linus Torvalds
580
net/irda/irias_object.c
Normal file
580
net/irda/irias_object.c
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@@ -0,0 +1,580 @@
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/*********************************************************************
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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 Troms<6D> 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 strndup (str, max)
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*
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* My own kernel version of strndup!
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*
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* Faster, check boundary... Jean II
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*/
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static char *strndup(char *str, int max)
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{
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char *new_str;
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int len;
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/* Check string */
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if (str == NULL)
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return NULL;
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/* Check length, truncate */
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len = strlen(str);
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if(len > max)
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len = max;
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/* Allocate new string */
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new_str = kmalloc(len + 1, GFP_ATOMIC);
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if (new_str == NULL) {
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IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
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return NULL;
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}
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/* Copy and truncate */
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memcpy(new_str, str, len);
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new_str[len] = '\0';
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return new_str;
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}
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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", __FUNCTION__);
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obj = (struct ias_object *) kmalloc(sizeof(struct ias_object),
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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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__FUNCTION__);
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return NULL;
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}
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memset(obj, 0, sizeof( struct ias_object));
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obj->magic = IAS_OBJECT_MAGIC;
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obj->name = strndup(name, IAS_MAX_CLASSNAME);
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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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__FUNCTION__);
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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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if (attrib->name)
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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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if (obj->name)
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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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__FUNCTION__);
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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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EXPORT_SYMBOL(irias_find_attrib);
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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", __FUNCTION__,
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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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__FUNCTION__, 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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__FUNCTION__);
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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 = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
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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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__FUNCTION__);
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return;
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}
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memset(attrib, 0, sizeof( struct ias_attrib));
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attrib->magic = IAS_ATTRIB_MAGIC;
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attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
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/* Insert value */
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attrib->value = irias_new_integer_value(value);
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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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|
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IRDA_ASSERT(name != NULL, return;);
|
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IRDA_ASSERT(octets != NULL, return;);
|
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|
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attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
|
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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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__FUNCTION__);
|
||||
return;
|
||||
}
|
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memset(attrib, 0, sizeof( struct ias_attrib));
|
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|
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attrib->magic = IAS_ATTRIB_MAGIC;
|
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attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
|
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|
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attrib->value = irias_new_octseq_value( octets, len);
|
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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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/*
|
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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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void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
|
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int owner)
|
||||
{
|
||||
struct ias_attrib *attrib;
|
||||
|
||||
IRDA_ASSERT(obj != NULL, return;);
|
||||
IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
|
||||
|
||||
IRDA_ASSERT(name != NULL, return;);
|
||||
IRDA_ASSERT(value != NULL, return;);
|
||||
|
||||
attrib = (struct ias_attrib *) kmalloc(sizeof( struct ias_attrib),
|
||||
GFP_ATOMIC);
|
||||
if (attrib == NULL) {
|
||||
IRDA_WARNING("%s: Unable to allocate attribute!\n",
|
||||
__FUNCTION__);
|
||||
return;
|
||||
}
|
||||
memset(attrib, 0, sizeof( struct ias_attrib));
|
||||
|
||||
attrib->magic = IAS_ATTRIB_MAGIC;
|
||||
attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
|
||||
|
||||
attrib->value = irias_new_string_value(value);
|
||||
|
||||
irias_add_attrib(obj, attrib, owner);
|
||||
}
|
||||
EXPORT_SYMBOL(irias_add_string_attrib);
|
||||
|
||||
/*
|
||||
* Function irias_new_integer_value (integer)
|
||||
*
|
||||
* Create new IAS integer value
|
||||
*
|
||||
*/
|
||||
struct ias_value *irias_new_integer_value(int integer)
|
||||
{
|
||||
struct ias_value *value;
|
||||
|
||||
value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
|
||||
if (value == NULL) {
|
||||
IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
|
||||
return NULL;
|
||||
}
|
||||
memset(value, 0, sizeof(struct ias_value));
|
||||
|
||||
value->type = IAS_INTEGER;
|
||||
value->len = 4;
|
||||
value->t.integer = integer;
|
||||
|
||||
return value;
|
||||
}
|
||||
EXPORT_SYMBOL(irias_new_integer_value);
|
||||
|
||||
/*
|
||||
* Function irias_new_string_value (string)
|
||||
*
|
||||
* Create new IAS string value
|
||||
*
|
||||
* Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
|
||||
*/
|
||||
struct ias_value *irias_new_string_value(char *string)
|
||||
{
|
||||
struct ias_value *value;
|
||||
|
||||
value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
|
||||
if (value == NULL) {
|
||||
IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
|
||||
return NULL;
|
||||
}
|
||||
memset( value, 0, sizeof( struct ias_value));
|
||||
|
||||
value->type = IAS_STRING;
|
||||
value->charset = CS_ASCII;
|
||||
value->t.string = strndup(string, IAS_MAX_STRING);
|
||||
value->len = strlen(value->t.string);
|
||||
|
||||
return value;
|
||||
}
|
||||
EXPORT_SYMBOL(irias_new_string_value);
|
||||
|
||||
/*
|
||||
* Function irias_new_octseq_value (octets, len)
|
||||
*
|
||||
* Create new IAS octet-sequence value
|
||||
*
|
||||
* Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
|
||||
*/
|
||||
struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
|
||||
{
|
||||
struct ias_value *value;
|
||||
|
||||
value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
|
||||
if (value == NULL) {
|
||||
IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
|
||||
return NULL;
|
||||
}
|
||||
memset(value, 0, sizeof(struct ias_value));
|
||||
|
||||
value->type = IAS_OCT_SEQ;
|
||||
/* Check length */
|
||||
if(len > IAS_MAX_OCTET_STRING)
|
||||
len = IAS_MAX_OCTET_STRING;
|
||||
value->len = len;
|
||||
|
||||
value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
|
||||
if (value->t.oct_seq == NULL){
|
||||
IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
|
||||
kfree(value);
|
||||
return NULL;
|
||||
}
|
||||
memcpy(value->t.oct_seq, octseq , len);
|
||||
return value;
|
||||
}
|
||||
EXPORT_SYMBOL(irias_new_octseq_value);
|
||||
|
||||
struct ias_value *irias_new_missing_value(void)
|
||||
{
|
||||
struct ias_value *value;
|
||||
|
||||
value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
|
||||
if (value == NULL) {
|
||||
IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
|
||||
return NULL;
|
||||
}
|
||||
memset(value, 0, sizeof(struct ias_value));
|
||||
|
||||
value->type = IAS_MISSING;
|
||||
value->len = 0;
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function irias_delete_value (value)
|
||||
*
|
||||
* Delete IAS value
|
||||
*
|
||||
*/
|
||||
void irias_delete_value(struct ias_value *value)
|
||||
{
|
||||
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
|
||||
|
||||
IRDA_ASSERT(value != NULL, return;);
|
||||
|
||||
switch (value->type) {
|
||||
case IAS_INTEGER: /* Fallthrough */
|
||||
case IAS_MISSING:
|
||||
/* No need to deallocate */
|
||||
break;
|
||||
case IAS_STRING:
|
||||
/* If string, deallocate string */
|
||||
if (value->t.string != NULL)
|
||||
kfree(value->t.string);
|
||||
break;
|
||||
case IAS_OCT_SEQ:
|
||||
/* If byte stream, deallocate byte stream */
|
||||
if (value->t.oct_seq != NULL)
|
||||
kfree(value->t.oct_seq);
|
||||
break;
|
||||
default:
|
||||
IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
|
||||
break;
|
||||
}
|
||||
kfree(value);
|
||||
}
|
||||
EXPORT_SYMBOL(irias_delete_value);
|
||||
Reference in New Issue
Block a user