You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/*
|
|
* lib/cache_mngt.c Cache Management
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation version 2.1
|
|
* of the License.
|
|
*
|
|
* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
|
|
*/
|
|
|
|
/**
|
|
* @ingroup core
|
|
* @defgroup cache_mngt Caching
|
|
* @{
|
|
*/
|
|
|
|
#include <netlink-local.h>
|
|
#include <netlink/netlink.h>
|
|
#include <netlink/cache.h>
|
|
#include <netlink/utils.h>
|
|
|
|
static struct nl_cache_ops *cache_ops;
|
|
|
|
/**
|
|
* @name Cache Operations Sets
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Lookup the set cache operations of a certain cache type
|
|
* @arg name name of the cache type
|
|
*
|
|
* @return The cache operations or NULL if no operations
|
|
* have been registered under the specified name.
|
|
*/
|
|
struct nl_cache_ops *nl_cache_ops_lookup(const char *name)
|
|
{
|
|
struct nl_cache_ops *ops;
|
|
|
|
for (ops = cache_ops; ops; ops = ops->co_next)
|
|
if (!strcmp(ops->co_name, name))
|
|
return ops;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Associate a message type to a set of cache operations
|
|
* @arg protocol netlink protocol
|
|
* @arg msgtype netlink message type
|
|
*
|
|
* Associates the specified netlink message type with
|
|
* a registered set of cache operations.
|
|
*
|
|
* @return The cache operations or NULL if no association
|
|
* could be made.
|
|
*/
|
|
struct nl_cache_ops *nl_cache_ops_associate(int protocol, int msgtype)
|
|
{
|
|
int i;
|
|
struct nl_cache_ops *ops;
|
|
|
|
for (ops = cache_ops; ops; ops = ops->co_next) {
|
|
if (ops->co_protocol != protocol)
|
|
continue;
|
|
|
|
for (i = 0; ops->co_msgtypes[i].mt_id >= 0; i++)
|
|
if (ops->co_msgtypes[i].mt_id == msgtype)
|
|
return ops;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Register a set of cache operations
|
|
* @arg ops cache operations
|
|
*
|
|
* Called by users of caches to announce the avaibility of
|
|
* a certain cache type.
|
|
*
|
|
* @return 0 on success or a negative error code.
|
|
*/
|
|
int nl_cache_mngt_register(struct nl_cache_ops *ops)
|
|
{
|
|
if (!ops->co_name || !ops->co_obj_ops)
|
|
return -NLE_INVAL;
|
|
|
|
if (nl_cache_ops_lookup(ops->co_name))
|
|
return -NLE_EXIST;
|
|
|
|
ops->co_next = cache_ops;
|
|
cache_ops = ops;
|
|
|
|
NL_DBG(1, "Registered cache operations %s\n", ops->co_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Unregister a set of cache operations
|
|
* @arg ops cache operations
|
|
*
|
|
* Called by users of caches to announce a set of
|
|
* cache operations is no longer available. The
|
|
* specified cache operations must have been registered
|
|
* previously using nl_cache_mngt_register()
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int nl_cache_mngt_unregister(struct nl_cache_ops *ops)
|
|
{
|
|
struct nl_cache_ops *t, **tp;
|
|
|
|
for (tp = &cache_ops; (t=*tp) != NULL; tp = &t->co_next)
|
|
if (t == ops)
|
|
break;
|
|
|
|
if (!t)
|
|
return -NLE_NOCACHE;
|
|
|
|
NL_DBG(1, "Unregistered cache operations %s\n", ops->co_name);
|
|
|
|
*tp = t->co_next;
|
|
return 0;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
/** @} */
|