libvirt/src/util/virnetlink.h
Laine Stump 51ec9f6c07 util: remove extraneous defined(__linux__) when checking for WITH_LIBNL
WITH_LIBNL will only be defined on Linux platforms (because libnl is a
library written to encapsulate parts of netlink, which is a Linux-only
API), so it's redundant to write:

  #if defined(__linux__) && defined(WITH_LIBNL)

We can just check for WITH_LIBNL.

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2020-10-01 14:02:34 -04:00

155 lines
5.2 KiB
C

/*
* Copyright (C) 2010-2013, 2015 Red Hat, Inc.
* Copyright (C) 2010-2012 IBM Corporation
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "internal.h"
#include "virmacaddr.h"
#if defined(WITH_LIBNL)
# include <netlink/msg.h>
typedef struct nl_msg virNetlinkMsg;
G_DEFINE_AUTOPTR_CLEANUP_FUNC(virNetlinkMsg, nlmsg_free);
#else
struct nl_msg;
struct sockaddr_nl;
struct nlattr;
struct nlmsghdr;
#endif /* WITH_LIBNL */
#define NETLINK_MSG_NEST_START(msg, container, attrtype) \
do { \
container = nla_nest_start(msg, attrtype); \
if (!container) \
goto buffer_too_small; \
} while(0)
#define NETLINK_MSG_NEST_END(msg, container) \
do { nla_nest_end(msg, container); } while(0)
/*
* we need to use an intermediary pointer to @data as compilers may sometimes
* complain about @data not being a pointer type:
* error: the address of 'foo' will always evaluate as 'true' [-Werror=address]
*/
#define NETLINK_MSG_PUT(msg, attrtype, datalen, data) \
do { \
const void *dataptr = data; \
if (dataptr && nla_put(msg, attrtype, datalen, dataptr) < 0) \
goto buffer_too_small; \
} while(0)
int virNetlinkStartup(void);
void virNetlinkShutdown(void);
int virNetlinkCommand(struct nl_msg *nl_msg,
struct nlmsghdr **resp, unsigned int *respbuflen,
uint32_t src_pid, uint32_t dst_pid,
unsigned int protocol, unsigned int groups);
typedef int (*virNetlinkDumpCallback)(struct nlmsghdr *resp,
void *data);
int virNetlinkDumpCommand(struct nl_msg *nl_msg,
virNetlinkDumpCallback callback,
uint32_t src_pid, uint32_t dst_pid,
unsigned int protocol, unsigned int groups,
void *opaque);
typedef struct _virNetlinkNewLinkData virNetlinkNewLinkData;
typedef virNetlinkNewLinkData *virNetlinkNewLinkDataPtr;
struct _virNetlinkNewLinkData {
const int *ifindex; /* The index for the 'link' device */
const virMacAddr *mac; /* The MAC address of the device */
const uint32_t *macvlan_mode; /* The mode of macvlan */
};
int virNetlinkNewLink(const char *ifname,
const char *type,
virNetlinkNewLinkDataPtr data,
int *error);
typedef int (*virNetlinkDelLinkFallback)(const char *ifname);
int virNetlinkDelLink(const char *ifname, virNetlinkDelLinkFallback fallback);
int virNetlinkGetErrorCode(struct nlmsghdr *resp, unsigned int recvbuflen);
int virNetlinkDumpLink(const char *ifname, int ifindex,
void **nlData, struct nlattr **tb,
uint32_t src_pid, uint32_t dst_pid)
G_GNUC_WARN_UNUSED_RESULT;
int
virNetlinkGetNeighbor(void **nlData, uint32_t src_pid, uint32_t dst_pid);
typedef void (*virNetlinkEventHandleCallback)(struct nlmsghdr *,
unsigned int length,
struct sockaddr_nl *peer,
bool *handled,
void *opaque);
typedef void (*virNetlinkEventRemoveCallback)(int watch,
const virMacAddr *macaddr,
void *opaque);
/**
* stopNetlinkEventServer: stop the monitor to receive netlink messages for libvirtd
*/
int virNetlinkEventServiceStop(unsigned int protocol);
/**
* stopNetlinkEventServerAll: stop all the monitors to receive netlink messages for libvirtd
*/
int virNetlinkEventServiceStopAll(void);
/**
* startNetlinkEventServer: start a monitor to receive netlink messages for libvirtd
*/
int virNetlinkEventServiceStart(unsigned int protocol, unsigned int groups);
/**
* virNetlinkEventServiceIsRunning: returns if the netlink event service is running.
*/
bool virNetlinkEventServiceIsRunning(unsigned int protocol);
/**
* virNetlinkEventServiceLocalPid: returns nl_pid used to bind() netlink socket
*/
int virNetlinkEventServiceLocalPid(unsigned int protocol);
/**
* virNetlinkEventAddClient: register a callback for handling of netlink messages
*/
int virNetlinkEventAddClient(virNetlinkEventHandleCallback handleCB,
virNetlinkEventRemoveCallback removeCB,
void *opaque, const virMacAddr *macaddr,
unsigned int protocol);
/**
* virNetlinkEventRemoveClient: unregister a callback from a netlink monitor
*/
int virNetlinkEventRemoveClient(int watch, const virMacAddr *macaddr,
unsigned int protocol);