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4d846d260e
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
130 lines
4.6 KiB
C
130 lines
4.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NETLINK_NETLINK_CTL_H_
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#define _NETLINK_NETLINK_CTL_H_
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#ifdef _KERNEL
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/*
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* This file provides headers for the public KPI of the netlink
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* subsystem
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*/
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#include <sys/_eventhandler.h>
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MALLOC_DECLARE(M_NETLINK);
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/*
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* Macro for handling attribute TLVs
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*/
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#define _roundup2(x, y) (((x)+((y)-1))&(~((y)-1)))
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#define NETLINK_ALIGN_SIZE sizeof(uint32_t)
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#define NETLINK_ALIGN(_len) _roundup2(_len, NETLINK_ALIGN_SIZE)
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#define NLA_ALIGN_SIZE sizeof(uint32_t)
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#define NLA_ALIGN(_len) _roundup2(_len, NLA_ALIGN_SIZE)
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#define NLA_HDRLEN ((int)sizeof(struct nlattr))
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#define NLA_DATA_LEN(_nla) ((int)((_nla)->nla_len - NLA_HDRLEN))
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#define NLA_DATA(_nla) NL_ITEM_DATA(_nla, NLA_HDRLEN)
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#define NLA_DATA_CONST(_nla) NL_ITEM_DATA_CONST(_nla, NLA_HDRLEN)
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#define NLA_TYPE(_nla) ((_nla)->nla_type & 0x3FFF)
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#ifndef typeof
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#define typeof __typeof
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#endif
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#define NLA_NEXT(_attr) (struct nlattr *)((char *)_attr + NLA_ALIGN(_attr->nla_len))
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#define _NLA_END(_start, _len) ((char *)(_start) + (_len))
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#define NLA_FOREACH(_attr, _start, _len) \
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for (typeof(_attr) _end = (typeof(_attr))_NLA_END(_start, _len), _attr = (_start); \
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((char *)_attr < (char *)_end) && \
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((char *)NLA_NEXT(_attr) <= (char *)_end); \
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_attr = (_len -= NLA_ALIGN(_attr->nla_len), NLA_NEXT(_attr)))
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#define NL_ARRAY_LEN(_a) (sizeof(_a) / sizeof((_a)[0]))
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#include <netlink/netlink_message_writer.h>
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#include <netlink/netlink_message_parser.h>
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/* Protocol handlers */
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struct nl_pstate;
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typedef int (*nl_handler_f)(struct nlmsghdr *hdr, struct nl_pstate *npt);
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bool netlink_register_proto(int proto, const char *proto_name, nl_handler_f handler);
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bool netlink_unregister_proto(int proto);
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/* Common helpers */
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bool nl_has_listeners(int netlink_family, uint32_t groups_mask);
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bool nlp_has_priv(struct nlpcb *nlp, int priv);
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struct ucred *nlp_get_cred(struct nlpcb *nlp);
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uint32_t nlp_get_pid(const struct nlpcb *nlp);
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bool nlp_unconstrained_vnet(const struct nlpcb *nlp);
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/* netlink_generic.c */
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struct genl_cmd {
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const char *cmd_name;
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nl_handler_f cmd_cb;
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uint32_t cmd_flags;
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uint32_t cmd_priv;
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uint32_t cmd_num;
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};
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uint32_t genl_register_family(const char *family_name, size_t hdrsize,
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int family_version, int max_attr_idx);
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bool genl_unregister_family(const char *family_name);
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bool genl_register_cmds(const char *family_name, const struct genl_cmd *cmds,
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int count);
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uint32_t genl_register_group(const char *family_name, const char *group_name);
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struct genl_family;
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const char *genl_get_family_name(const struct genl_family *gf);
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uint32_t genl_get_family_id(const struct genl_family *gf);
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typedef void (*genl_family_event_handler_t)(void *arg, const struct genl_family *gf, int action);
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EVENTHANDLER_DECLARE(genl_family_event, genl_family_event_handler_t);
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struct thread;
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#if defined(NETLINK) || defined(NETLINK_MODULE)
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/* Provide optimized calls to the functions inside the same linking unit */
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struct nlpcb *_nl_get_thread_nlp(struct thread *td);
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static inline struct nlpcb *
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nl_get_thread_nlp(struct thread *td)
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{
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return (_nl_get_thread_nlp(td));
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}
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#else
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/* Provide access to the functions via netlink_glue.c */
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struct nlpcb *nl_get_thread_nlp(struct thread *td);
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#endif /* defined(NETLINK) || defined(NETLINK_MODULE) */
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#endif
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#endif
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