8a3efffa5b
In order for the interface to become more thread safe, the error
handling was revised to no longer depend on a static errno and
error string buffer.
This patch converts all error paths to return a libnl specific
error code which can be translated to a error message using
nl_geterror(int error). The functions nl_error() and
nl_get_errno() are therefore obsolete.
This change required various sets of function prototypes to be
changed in order to return an error code, the most prominent
are:
struct nl_cache *foo_alloc_cache(...);
changed to:
int foo_alloc_cache(..., struct nl_cache **);
struct nl_msg *foo_build_request(...);
changed to:
int foo_build_request(..., struct nl_msg **);
struct foo *foo_parse(...);
changed to:
int foo_parse(..., struct foo **);
This pretty much only leaves trivial allocation functions to
still return a pointer object which can still return NULL to
signal out of memory.
This change is a serious API and ABI breaker, sorry!
103 lines
2 KiB
C
103 lines
2 KiB
C
/*
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* lib/route/cls_api.c Classifier Module API
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
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*/
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/**
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* @ingroup cls
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* @defgroup cls_api Classifier Modules
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* @{
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*/
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#include <netlink-local.h>
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#include <netlink-tc.h>
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#include <netlink/netlink.h>
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#include <netlink/utils.h>
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#include <netlink/route/tc.h>
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#include <netlink/route/classifier.h>
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#include <netlink/route/classifier-modules.h>
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#include <netlink/route/link.h>
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static struct rtnl_cls_ops *cls_ops_list;
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/**
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* @name Classifier Module API
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* @{
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*/
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/**
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* Register a classifier module
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* @arg cops classifier module operations
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*/
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int rtnl_cls_register(struct rtnl_cls_ops *cops)
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{
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struct rtnl_cls_ops *o, **op;
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if (!cops->co_kind)
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BUG();
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for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
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if (!strcasecmp(cops->co_kind, o->co_kind))
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return -NLE_EXIST;
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cops->co_next = NULL;
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*op = cops;
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return 0;
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}
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/**
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* Unregister a classifier module
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* @arg cops classifier module operations
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*/
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int rtnl_cls_unregister(struct rtnl_cls_ops *cops)
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{
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struct rtnl_cls_ops *o, **op;
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for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
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if (!strcasecmp(cops->co_kind, o->co_kind))
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break;
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if (!o)
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return -NLE_OBJ_NOTFOUND;
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*op = cops->co_next;
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return 0;
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}
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struct rtnl_cls_ops *__rtnl_cls_lookup_ops(const char *kind)
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{
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struct rtnl_cls_ops *cops;
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for (cops = cls_ops_list; cops; cops = cops->co_next)
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if (!strcmp(kind, cops->co_kind))
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return cops;
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return NULL;
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}
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/**
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* Lookup classifier operations for a classifier object
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* @arg cls Classifier object.
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*
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* @return Classifier operations or NULL if not found.
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*/
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struct rtnl_cls_ops *rtnl_cls_lookup_ops(struct rtnl_cls *cls)
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{
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if (!cls->c_ops)
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cls->c_ops = __rtnl_cls_lookup_ops(cls->c_kind);
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return cls->c_ops;
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}
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/** @} */
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/** @} */
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