089104e0e0
This change adds netlink create/modify/dump interfaces to the `if_clone.c`. The previous attempt with storing the logic inside `netlink/route/iface_drivers.c` did not quite work, as, for example, dumping interface-specific state (like vlan id or vlan parent) required some peeking into the private interfaces. The new interfaces are added in a compatible way - callers don't have to do anything unless they are extended with Netlink. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D39032 MFC after: 1 month
147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
#include "opt_inet.h"
|
|
#include "opt_inet6.h"
|
|
#include <sys/types.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/socketvar.h>
|
|
|
|
#include <net/ethernet.h>
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_media.h>
|
|
#include <net/if_var.h>
|
|
#include <net/if_clone.h>
|
|
#include <net/if_vlan_var.h>
|
|
#include <net/route.h>
|
|
#include <net/route/nhop.h>
|
|
#include <net/route/route_ctl.h>
|
|
#include <netlink/netlink.h>
|
|
#include <netlink/netlink_ctl.h>
|
|
#include <netlink/netlink_route.h>
|
|
#include <netlink/route/route_var.h>
|
|
|
|
#include <netinet6/scope6_var.h> /* scope deembedding */
|
|
|
|
#define DEBUG_MOD_NAME nl_iface_drivers
|
|
#define DEBUG_MAX_LEVEL LOG_DEBUG3
|
|
#include <netlink/netlink_debug.h>
|
|
_DECLARE_DEBUG(LOG_DEBUG);
|
|
|
|
/*
|
|
* Generic modification interface handler.
|
|
* Responsible for changing network stack interface attributes
|
|
* such as state, mtu or description.
|
|
*/
|
|
int
|
|
nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs,
|
|
const struct nlattr_bmask *bm, struct nl_pstate *npt)
|
|
{
|
|
int error;
|
|
|
|
if (lattrs->ifla_ifalias != NULL) {
|
|
if (nlp_has_priv(npt->nlp, PRIV_NET_SETIFDESCR)) {
|
|
int len = strlen(lattrs->ifla_ifalias) + 1;
|
|
char *buf = if_allocdescr(len, M_WAITOK);
|
|
|
|
memcpy(buf, lattrs->ifla_ifalias, len);
|
|
if_setdescr(ifp, buf);
|
|
getmicrotime(&ifp->if_lastchange);
|
|
} else {
|
|
nlmsg_report_err_msg(npt, "Not enough privileges to set descr");
|
|
return (EPERM);
|
|
}
|
|
}
|
|
|
|
if ((lattrs->ifi_change & IFF_UP) && (lattrs->ifi_flags & IFF_UP) == 0) {
|
|
/* Request to down the interface */
|
|
if_down(ifp);
|
|
}
|
|
|
|
if (lattrs->ifla_mtu > 0) {
|
|
if (nlp_has_priv(npt->nlp, PRIV_NET_SETIFMTU)) {
|
|
struct ifreq ifr = { .ifr_mtu = lattrs->ifla_mtu };
|
|
error = ifhwioctl(SIOCSIFMTU, ifp, (char *)&ifr, curthread);
|
|
} else {
|
|
nlmsg_report_err_msg(npt, "Not enough privileges to set mtu");
|
|
return (EPERM);
|
|
}
|
|
}
|
|
|
|
if (lattrs->ifi_change & IFF_PROMISC) {
|
|
error = ifpromisc(ifp, lattrs->ifi_flags & IFF_PROMISC);
|
|
if (error != 0) {
|
|
nlmsg_report_err_msg(npt, "unable to set promisc");
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Saves the resulting ifindex and ifname to report them
|
|
* to userland along with the operation result.
|
|
* NLA format:
|
|
* NLMSGERR_ATTR_COOKIE(nested)
|
|
* IFLA_NEW_IFINDEX(u32)
|
|
* IFLA_IFNAME(string)
|
|
*/
|
|
void
|
|
nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp)
|
|
{
|
|
int ifname_len = strlen(if_name(ifp));
|
|
uint32_t ifindex = (uint32_t)ifp->if_index;
|
|
|
|
int nla_len = sizeof(struct nlattr) * 3 +
|
|
sizeof(ifindex) + NL_ITEM_ALIGN(ifname_len + 1);
|
|
struct nlattr *nla_cookie = npt_alloc(npt, nla_len);
|
|
|
|
/* Nested TLV */
|
|
nla_cookie->nla_len = nla_len;
|
|
nla_cookie->nla_type = NLMSGERR_ATTR_COOKIE;
|
|
|
|
struct nlattr *nla = nla_cookie + 1;
|
|
nla->nla_len = sizeof(struct nlattr) + sizeof(ifindex);
|
|
nla->nla_type = IFLA_NEW_IFINDEX;
|
|
memcpy(NLA_DATA(nla), &ifindex, sizeof(ifindex));
|
|
|
|
nla = NLA_NEXT(nla);
|
|
nla->nla_len = sizeof(struct nlattr) + ifname_len + 1;
|
|
nla->nla_type = IFLA_IFNAME;
|
|
strlcpy(NLA_DATA(nla), if_name(ifp), ifname_len + 1);
|
|
|
|
nlmsg_report_cookie(npt, nla_cookie);
|
|
}
|
|
|