Differential D26449 Diff 77161 sys/net/route/route_ctl.c

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sys/net/route/route_ctl.c

Show All 23 Lines
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.		* SUCH DAMAGE.
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");
#include "opt_inet.h"		#include "opt_inet.h"
#include "opt_inet6.h"		#include "opt_inet6.h"
#include "opt_mpath.h"		#include "opt_route.h"

#include <sys/param.h>		#include <sys/param.h>
#include <sys/systm.h>		#include <sys/systm.h>
#include <sys/malloc.h>		#include <sys/malloc.h>
#include <sys/mbuf.h>		#include <sys/mbuf.h>
#include <sys/socket.h>		#include <sys/socket.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
#include <sys/syslog.h>		#include <sys/syslog.h>
Show All 37 Lines	static int add_route(struct rib_head rnh, struct rt_addrinfo info,
struct rib_cmd_info *rc);		struct rib_cmd_info *rc);
static int add_route_nhop(struct rib_head rnh, struct rtentry rt,		static int add_route_nhop(struct rib_head rnh, struct rtentry rt,
struct rt_addrinfo info, struct route_nhop_data rnd,		struct rt_addrinfo info, struct route_nhop_data rnd,
struct rib_cmd_info *rc);		struct rib_cmd_info *rc);
static int del_route(struct rib_head rnh, struct rt_addrinfo info,		static int del_route(struct rib_head rnh, struct rt_addrinfo info,
struct rib_cmd_info *rc);		struct rib_cmd_info *rc);
static int change_route(struct rib_head rnh, struct rt_addrinfo info,		static int change_route(struct rib_head rnh, struct rt_addrinfo info,
struct route_nhop_data nhd_orig, struct rib_cmd_info rc);		struct route_nhop_data nhd_orig, struct rib_cmd_info rc);
static int change_route_nhop(struct rib_head rnh, struct rtentry rt,
struct rt_addrinfo info, struct route_nhop_data rnd,
struct rib_cmd_info *rc);

static int rt_unlinkrte(struct rib_head rnh, struct rt_addrinfo info,		static int rt_unlinkrte(struct rib_head rnh, struct rt_addrinfo info,
struct rib_cmd_info *rc);		struct rib_cmd_info *rc);

static void rib_notify(struct rib_head *rnh, enum rib_subscription_type type,		static void rib_notify(struct rib_head *rnh, enum rib_subscription_type type,
struct rib_cmd_info *rc);		struct rib_cmd_info *rc);

static void destroy_subscription_epoch(epoch_context_t ctx);		static void destroy_subscription_epoch(epoch_context_t ctx);
		static bool rib_can_multipath(struct rib_head *rh);

		/* Per-vnet multipath routing configuration */
		SYSCTL_DECL(_net_route);
		#define V_rib_route_multipath VNET(rib_route_multipath)
		#ifdef ROUTE_MPATH
		VNET_DEFINE(u_int, rib_route_multipath) = 1;
		#define _MP_FLAGS CTLFLAG_RWTUN
		#else
		VNET_DEFINE(u_int, rib_route_multipath) = 0;
		#define _MP_FLAGS CTLFLAG_RD
		#endif
		SYSCTL_UINT(_net_route, OID_AUTO, multipath, _MP_FLAGS \| CTLFLAG_VNET,
		&VNET_NAME(rib_route_multipath), 0, "Enable route multipath");
		#undef _MP_FLAGS

/* Routing table UMA zone */		/* Routing table UMA zone */
VNET_DEFINE_STATIC(uma_zone_t, rtzone);		VNET_DEFINE_STATIC(uma_zone_t, rtzone);
#define V_rtzone VNET(rtzone)		#define V_rtzone VNET(rtzone)

void		void
vnet_rtzone_init()		vnet_rtzone_init()
{		{

Show All 17 Lines	destroy_rtentry(struct rtentry *rt)
/*		/*
* At this moment rnh, nh_control may be already freed.		* At this moment rnh, nh_control may be already freed.
* nhop interface may have been migrated to a different vnet.		* nhop interface may have been migrated to a different vnet.
* Use vnet stored in the nexthop to delete the entry.		* Use vnet stored in the nexthop to delete the entry.
*/		*/
CURVNET_SET(nhop_get_vnet(rt->rt_nhop));		CURVNET_SET(nhop_get_vnet(rt->rt_nhop));

/* Unreference nexthop */		/* Unreference nexthop */
nhop_free(rt->rt_nhop);		nhop_free_any(rt->rt_nhop);

uma_zfree(V_rtzone, rt);		uma_zfree(V_rtzone, rt);

CURVNET_RESTORE();		CURVNET_RESTORE();
}		}

/*		/*
* Epoch callback indicating rtentry is safe to destroy		* Epoch callback indicating rtentry is safe to destroy
Show All 30 Lines	get_rnh(uint32_t fibnum, const struct rt_addrinfo *info)
KASSERT((fibnum < rt_numfibs), ("rib_add_route: bad fibnum"));		KASSERT((fibnum < rt_numfibs), ("rib_add_route: bad fibnum"));

dst = info->rti_info[RTAX_DST];		dst = info->rti_info[RTAX_DST];
rnh = rt_tables_get_rnh(fibnum, dst->sa_family);		rnh = rt_tables_get_rnh(fibnum, dst->sa_family);

return (rnh);		return (rnh);
}		}

		#ifdef ROUTE_MPATH
		static bool
		rib_can_multipath(struct rib_head *rh)
		{
		int result;

		CURVNET_SET(rh->rib_vnet);
		result = !!V_rib_route_multipath;
		CURVNET_RESTORE();

		return (result);
		}

/*		/*
		* Check is nhop is multipath-eligible.
		* Avoid nhops without gateways and redirects.
		*
		* Returns 1 for multipath-eligible nexthop,
		* 0 otherwise.
		*/
		bool
		nhop_can_multipath(const struct nhop_object *nh)
		{

		if ((nh->nh_flags & NHF_MULTIPATH) != 0)
		return (1);
		if ((nh->nh_flags & NHF_GATEWAY) == 0)
		return (0);
		if ((nh->nh_flags & NHF_REDIRECT) != 0)
		return (0);

		return (1);
		}
		#endif

		static int
		get_info_weight(const struct rt_addrinfo *info, uint32_t default_weight)
		{
		uint32_t weight;

		if (info->rti_mflags & RTV_WEIGHT)
		weight = info->rti_rmx->rmx_weight;
		else
		weight = default_weight;
		/* Keep upper 1 byte for adm distance purposes */
		if (weight > RT_MAX_WEIGHT)
		weight = RT_MAX_WEIGHT;

		return (weight);
		}

		static void
		rt_set_expire_info(struct rtentry rt, const struct rt_addrinfo info)
		{

		/* Kernel -> userland timebase conversion. */
		if (info->rti_mflags & RTV_EXPIRE)
		rt->rt_expire = info->rti_rmx->rmx_expire ?
		info->rti_rmx->rmx_expire - time_second + time_uptime : 0;
		}

		/*
* Check if specified @gw matches gw data in the nexthop @nh.		* Check if specified @gw matches gw data in the nexthop @nh.
*		*
* Returns true if matches, false otherwise.		* Returns true if matches, false otherwise.
*/		*/
static bool		bool
match_nhop_gw(const struct nhop_object nh, const struct sockaddr gw)		match_nhop_gw(const struct nhop_object nh, const struct sockaddr gw)
{		{

if (nh->gw_sa.sa_family != gw->sa_family)		if (nh->gw_sa.sa_family != gw->sa_family)
return (false);		return (false);

switch (gw->sa_family) {		switch (gw->sa_family) {
case AF_INET:		case AF_INET:
▲ Show 20 Lines • Show All 226 Lines • ▼ Show 20 Lines	if (netmask) {
bcopy(dst, ndst, dst->sa_len);		bcopy(dst, ndst, dst->sa_len);

/*		/*
* We use the ifa reference returned by rt_getifa_fib().		* We use the ifa reference returned by rt_getifa_fib().
* This moved from below so that rnh->rnh_addaddr() can		* This moved from below so that rnh->rnh_addaddr() can
* examine the ifa and ifa->ifa_ifp if it so desires.		* examine the ifa and ifa->ifa_ifp if it so desires.
*/		*/
ifa = info->rti_ifa;		ifa = info->rti_ifa;
rt->rt_weight = 1;		rt->rt_weight = get_info_weight(info, RT_DEFAULT_WEIGHT);
		rt_set_expire_info(rt, info);

rt_setmetrics(info, rt);

*prt = rt;		*prt = rt;
return (0);		return (0);
}		}

static int		static int
add_route(struct rib_head rnh, struct rt_addrinfo info,		add_route(struct rib_head rnh, struct rt_addrinfo info,
struct rib_cmd_info *rc)		struct rib_cmd_info *rc)
{		{
struct nhop_object *nh_orig;		struct nhop_object *nh_orig;
struct route_nhop_data rnd;		struct route_nhop_data rnd_orig, rnd_add;
struct nhop_object *nh;		struct nhop_object *nh;
struct rtentry rt, rt_orig;		struct rtentry rt, rt_orig;
int error;		int error;

error = create_rtentry(rnh, info, &rt);		error = create_rtentry(rnh, info, &rt);
if (error != 0)		if (error != 0)
return (error);		return (error);

rnd.rnd_nhop = rt->rt_nhop;		rnd_add.rnd_nhop = rt->rt_nhop;
rnd.rnd_weight = rt->rt_weight;		rnd_add.rnd_weight = rt->rt_weight;
nh = rt->rt_nhop;		nh = rt->rt_nhop;

RIB_WLOCK(rnh);		RIB_WLOCK(rnh);
#ifdef RADIX_MPATH		error = add_route_nhop(rnh, rt, info, &rnd_add, rc);
struct sockaddr *netmask;
netmask = info->rti_info[RTAX_NETMASK];
/* do not permit exactly the same dst/mask/gw pair */
if (rt_mpath_capable(rnh) &&
rt_mpath_conflict(rnh, rt, netmask)) {
RIB_WUNLOCK(rnh);

nhop_free(nh);
uma_zfree(V_rtzone, rt);
return (EEXIST);
}
#endif
error = add_route_nhop(rnh, rt, info, &rnd, rc);
if (error == 0) {		if (error == 0) {
RIB_WUNLOCK(rnh);		RIB_WUNLOCK(rnh);
return (0);		return (0);
}		}

/* addition failed. Lookup prefix in the rib to determine the cause */		/* addition failed. Lookup prefix in the rib to determine the cause */
rt_orig = lookup_prefix(rnh, info, &rnd);		rt_orig = lookup_prefix(rnh, info, &rnd_orig);
if (rt_orig == NULL) {		if (rt_orig == NULL) {
/* No prefix -> rnh_addaddr() failed to allocate memory */		/* No prefix -> rnh_addaddr() failed to allocate memory */
RIB_WUNLOCK(rnh);		RIB_WUNLOCK(rnh);
nhop_free(nh);		nhop_free(nh);
uma_zfree(V_rtzone, rt);		uma_zfree(V_rtzone, rt);
return (ENOMEM);		return (ENOMEM);
}		}

/* We have existing route in the RIB. */		/* We have existing route in the RIB. */
nh_orig = rnd.rnd_nhop;		nh_orig = rnd_orig.rnd_nhop;
/* Check if new route has higher preference */		/* Check if new route has higher preference */
if (can_override_nhop(info, nh_orig) > 0) {		if (can_override_nhop(info, nh_orig) > 0) {
/* Update nexthop to the new route */		/* Update nexthop to the new route */
change_route_nhop(rnh, rt_orig, info, &rnd, rc);		change_route_nhop(rnh, rt_orig, info, &rnd_add, rc);
RIB_WUNLOCK(rnh);		RIB_WUNLOCK(rnh);
uma_zfree(V_rtzone, rt);		uma_zfree(V_rtzone, rt);
nhop_free(nh_orig);		nhop_free(nh_orig);
return (0);		return (0);
}		}

RIB_WUNLOCK(rnh);		RIB_WUNLOCK(rnh);

		#ifdef ROUTE_MPATH
		if (rib_can_multipath(rnh) && nhop_can_multipath(rnd_add.rnd_nhop) &&
		nhop_can_multipath(rnd_orig.rnd_nhop))
		error = add_route_mpath(rnh, info, rt, &rnd_add, &rnd_orig, rc);
		else
		#endif
/* Unable to add - another route with the same preference exists */		/* Unable to add - another route with the same preference exists */
error = EEXIST;		error = EEXIST;

		/*
		* no multipath: failed to add, free both nhop and rc
		* multipath: original nhop reference is unused in any case,
		* rt can be used only if _adding_ new route (e.g. the case
		* when initial lookup returned existing route, but then it get
		* deleted prior to multipath group insertion, leading to a simple
		* non-multipath add as a result).
		*/
nhop_free(nh);		nhop_free(nh);
		if ((error != 0) \|\| rc->rc_cmd != RTM_ADD)
		donnerUnsubmitted Not Done Inline Actions So in the case of ! ROUTE_MPATH, the call to uma_zfree is suppressed now? donner: So in the case of ! ROUTE_MPATH, the call to uma_zfree is suppressed now?
		melifaroAuthorUnsubmitted Done Inline Actions Not exactly. We have error set to EEXIST above, which renders this condition to be true. melifaro: Not exactly. We have error set to EEXIST above, which renders this condition to be true.
uma_zfree(V_rtzone, rt);		uma_zfree(V_rtzone, rt);

return (error);		return (error);
}		}

/*		/*
* Removes route defined by @info from the kernel table specified by @fibnum and		* Removes route defined by @info from the kernel table specified by @fibnum and
* sa_family in @info->rti_info[RTAX_DST].		* sa_family in @info->rti_info[RTAX_DST].
*		*
Show All 35 Lines
/*		/*
* Conditionally unlinks rtentry matching data inside @info from @rnh.		* Conditionally unlinks rtentry matching data inside @info from @rnh.
* Returns 0 on success with operation result stored in @rc.		* Returns 0 on success with operation result stored in @rc.
* On error, returns:		* On error, returns:
* ESRCH - if prefix was not found,		* ESRCH - if prefix was not found,
* EADDRINUSE - if trying to delete higher priority route.		* EADDRINUSE - if trying to delete higher priority route.
* ENOENT - if supplied filter function returned 0 (not matched).		* ENOENT - if supplied filter function returned 0 (not matched).
*/		*/
static int		int
rt_unlinkrte(struct rib_head rnh, struct rt_addrinfo info, struct rib_cmd_info *rc)		rt_unlinkrte(struct rib_head rnh, struct rt_addrinfo info, struct rib_cmd_info *rc)
{		{
struct rtentry *rt;		struct rtentry *rt;
struct nhop_object *nh;		struct nhop_object *nh;
struct radix_node *rn;		struct radix_node *rn;
struct route_nhop_data rnd;		struct route_nhop_data rnd;
int error;		int error;

rt = lookup_prefix(rnh, info, &rnd);		rt = lookup_prefix(rnh, info, &rnd);
if (rt == NULL)		if (rt == NULL)
return (ESRCH);		return (ESRCH);

nh = rt->rt_nhop;		nh = rt->rt_nhop;
		#ifdef ROUTE_MPATH
		if (NH_IS_NHGRP(nh)) {
		error = del_route_mpath(rnh, info, rt,
		(struct nhgrp_object *)nh, rc);
		return (error);
		}
		#endif
error = check_info_match_nhop(info, rt, nh);		error = check_info_match_nhop(info, rt, nh);
if (error != 0)		if (error != 0)
return (error);		return (error);

if (can_override_nhop(info, nh) < 0)		if (can_override_nhop(info, nh) < 0)
return (EADDRINUSE);		return (EADDRINUSE);

/*		/*
* Remove the item from the tree and return it.		* Remove the item from the tree and return it.
* Complain if it is not there and do no more processing.		* Complain if it is not there and do no more processing.
*/		*/
#ifdef RADIX_MPATH
info->rti_info[RTAX_GATEWAY] = &nh->gw_sa;
if (rt_mpath_capable(rnh)) {
rn = rt_mpath_unlink(rnh, info, rt, &error);
if (error != 0)
return (error);
} else
#endif
rn = rnh->rnh_deladdr(info->rti_info[RTAX_DST],		rn = rnh->rnh_deladdr(info->rti_info[RTAX_DST],
info->rti_info[RTAX_NETMASK], &rnh->head);		info->rti_info[RTAX_NETMASK], &rnh->head);
if (rn == NULL)		if (rn == NULL)
return (ESRCH);		return (ESRCH);

if (rn->rn_flags & (RNF_ACTIVE \| RNF_ROOT))		if (rn->rn_flags & (RNF_ACTIVE \| RNF_ROOT))
panic ("rtrequest delete");		panic ("rtrequest delete");

Show All 24 Lines	if (error != 0)
return (error);		return (error);

rib_notify(rnh, RIB_NOTIFY_DELAYED, rc);		rib_notify(rnh, RIB_NOTIFY_DELAYED, rc);

/*		/*
* If the caller wants it, then it can have it,		* If the caller wants it, then it can have it,
* the entry will be deleted after the end of the current epoch.		* the entry will be deleted after the end of the current epoch.
*/		*/
		if (rc->rc_cmd == RTM_DELETE)
rtfree(rc->rc_rt);		rtfree(rc->rc_rt);
		#ifdef ROUTE_MPATH
		else {
		/*
		* Deleting 1 path may result in RTM_CHANGE to
		* a different mpath group/nhop.
		* Free old mpath group.
		*/
		nhop_free_any(rc->rc_nh_old);
		}
		#endif

return (0);		return (0);
}		}

int		int
rib_change_route(uint32_t fibnum, struct rt_addrinfo *info,		rib_change_route(uint32_t fibnum, struct rt_addrinfo *info,
struct rib_cmd_info *rc)		struct rib_cmd_info *rc)
{		{
Show All 29 Lines	rib_change_route(uint32_t fibnum, struct rt_addrinfo *info,
rt = (struct rtentry *)rnh->rnh_lookup(info->rti_info[RTAX_DST],		rt = (struct rtentry *)rnh->rnh_lookup(info->rti_info[RTAX_DST],
info->rti_info[RTAX_NETMASK], &rnh->head);		info->rti_info[RTAX_NETMASK], &rnh->head);

if (rt == NULL) {		if (rt == NULL) {
RIB_RUNLOCK(rnh);		RIB_RUNLOCK(rnh);
return (ESRCH);		return (ESRCH);
}		}

#ifdef RADIX_MPATH
/*
* If we got multipath routes,
* we require users to specify a matching RTAX_GATEWAY.
*/
if (rt_mpath_capable(rnh)) {
rt = rt_mpath_matchgate(rt, info->rti_info[RTAX_GATEWAY]);
if (rt == NULL) {
RIB_RUNLOCK(rnh);
return (ESRCH);
}
}
#endif
rnd_orig.rnd_nhop = rt->rt_nhop;		rnd_orig.rnd_nhop = rt->rt_nhop;
rnd_orig.rnd_weight = rt->rt_weight;		rnd_orig.rnd_weight = rt->rt_weight;

RIB_RUNLOCK(rnh);		RIB_RUNLOCK(rnh);

for (int i = 0; i < RIB_MAX_RETRIES; i++) {		for (int i = 0; i < RIB_MAX_RETRIES; i++) {
error = change_route(rnh, info, &rnd_orig, rc);		error = change_route(rnh, info, &rnd_orig, rc);
if (error != EAGAIN)		if (error != EAGAIN)
break;		break;
}		}

return (error);		return (error);
}		}

static int		static int
change_route(struct rib_head rnh, struct rt_addrinfo info,		change_nhop(struct rib_head rnh, struct rt_addrinfo info,
struct route_nhop_data rnd_orig, struct rib_cmd_info rc)		struct nhop_object nh_orig, struct nhop_object *nh_new)
{		{
int error = 0;
int free_ifa = 0;		int free_ifa = 0;
struct nhop_object nh, nh_orig;		int error;
struct route_nhop_data rnd_new;

nh = NULL;
nh_orig = rnd_orig->rnd_nhop;
if (nh_orig == NULL)
return (ESRCH);

/*		/*
* New gateway could require new ifaddr, ifp;		* New gateway could require new ifaddr, ifp;
* flags may also be different; ifp may be specified		* flags may also be different; ifp may be specified
* by ll sockaddr when protocol address is ambiguous		* by ll sockaddr when protocol address is ambiguous
*/		*/
if (((nh_orig->nh_flags & NHF_GATEWAY) &&		if (((nh_orig->nh_flags & NHF_GATEWAY) &&
info->rti_info[RTAX_GATEWAY] != NULL) \|\|		info->rti_info[RTAX_GATEWAY] != NULL) \|\|
info->rti_info[RTAX_IFP] != NULL \|\|		info->rti_info[RTAX_IFP] != NULL \|\|
(info->rti_info[RTAX_IFA] != NULL &&		(info->rti_info[RTAX_IFA] != NULL &&
!sa_equal(info->rti_info[RTAX_IFA], nh_orig->nh_ifa->ifa_addr))) {		!sa_equal(info->rti_info[RTAX_IFA], nh_orig->nh_ifa->ifa_addr))) {
error = rt_getifa_fib(info, rnh->rib_fibnum);		error = rt_getifa_fib(info, rnh->rib_fibnum);
if (info->rti_ifa != NULL)		if (info->rti_ifa != NULL)
free_ifa = 1;		free_ifa = 1;

if (error != 0) {		if (error != 0) {
if (free_ifa) {		if (free_ifa) {
ifa_free(info->rti_ifa);		ifa_free(info->rti_ifa);
info->rti_ifa = NULL;		info->rti_ifa = NULL;
}		}

return (error);		return (error);
}		}
}		}

error = nhop_create_from_nhop(rnh, nh_orig, info, &nh);		error = nhop_create_from_nhop(rnh, nh_orig, info, nh_new);
if (free_ifa) {		if (free_ifa) {
ifa_free(info->rti_ifa);		ifa_free(info->rti_ifa);
info->rti_ifa = NULL;		info->rti_ifa = NULL;
}		}

		return (error);
		}

		#ifdef ROUTE_MPATH
		static int
		change_mpath_route(struct rib_head rnh, struct rt_addrinfo info,
		struct route_nhop_data rnd_orig, struct rib_cmd_info rc)
		{
		int error = 0;
		struct nhop_object nh, nh_orig, *nh_new;
		struct route_nhop_data rnd_new;

		nh = NULL;
		nh_orig = rnd_orig->rnd_nhop;

		struct weightened_nhop wn = NULL, wn_new;
		uint32_t num_nhops;

		wn = nhgrp_get_nhops((struct nhgrp_object *)nh_orig, &num_nhops);
		nh_orig = NULL;
		for (int i = 0; i < num_nhops; i++) {
		if (check_info_match_nhop(info, NULL, wn[i].nh)) {
		nh_orig = wn[i].nh;
		break;
		}
		}

		if (nh_orig == NULL)
		return (ESRCH);

		error = change_nhop(rnh, info, nh_orig, &nh_new);
if (error != 0)		if (error != 0)
return (error);		return (error);

rnd_new.rnd_nhop = nh;		wn_new = mallocarray(num_nhops, sizeof(struct weightened_nhop),
if (info->rti_mflags & RTV_WEIGHT)		M_TEMP, M_NOWAIT \| M_ZERO);
rnd_new.rnd_weight = info->rti_rmx->rmx_weight;		if (wn_new == NULL) {
else		nhop_free(nh_new);
rnd_new.rnd_weight = rnd_orig->rnd_weight;		return (EAGAIN);
		}

		memcpy(wn_new, wn, num_nhops * sizeof(struct weightened_nhop));
		for (int i = 0; i < num_nhops; i++) {
		if (wn[i].nh == nh_orig) {
		wn[i].nh = nh_new;
		wn[i].weight = get_info_weight(info, rnd_orig->rnd_weight);
		break;
		}
		}

		error = nhgrp_get_group(rnh, wn_new, num_nhops, &rnd_new);
		nhop_free(nh_new);
		free(wn_new, M_TEMP);

		if (error != 0)
		return (error);

error = change_route_conditional(rnh, NULL, info, rnd_orig, &rnd_new, rc);		error = change_route_conditional(rnh, NULL, info, rnd_orig, &rnd_new, rc);

return (error);		return (error);
}		}
		#endif

		static int
		change_route(struct rib_head rnh, struct rt_addrinfo info,
		struct route_nhop_data rnd_orig, struct rib_cmd_info rc)
		{
		int error = 0;
		struct nhop_object nh, nh_orig;
		struct route_nhop_data rnd_new;

		nh = NULL;
		nh_orig = rnd_orig->rnd_nhop;
		if (nh_orig == NULL)
		return (ESRCH);

		if (NH_IS_NHGRP(nh_orig))
		return (change_mpath_route(rnh, info, rnd_orig, rc));

		rnd_new.rnd_weight = get_info_weight(info, rnd_orig->rnd_weight);
		error = change_nhop(rnh, info, nh_orig, &rnd_new.rnd_nhop);
		if (error != 0)
		return (error);
		error = change_route_conditional(rnh, NULL, info, rnd_orig, &rnd_new, rc);

		return (error);
		}

/*		/*
* Insert @rt with nhop data from @rnd_new to @rnh.		* Insert @rt with nhop data from @rnd_new to @rnh.
* Returns 0 on success and stores operation results in @rc.		* Returns 0 on success and stores operation results in @rc.
*/		*/
static int		static int
add_route_nhop(struct rib_head rnh, struct rtentry rt,		add_route_nhop(struct rib_head rnh, struct rtentry rt,
struct rt_addrinfo info, struct route_nhop_data rnd,		struct rt_addrinfo info, struct route_nhop_data rnd,
struct rib_cmd_info *rc)		struct rib_cmd_info *rc)
Show All 33 Lines	add_route_nhop(struct rib_head rnh, struct rtentry rt,
return (error);		return (error);
}		}

/*		/*
* Switch @rt nhop/weigh to the ones specified in @rnd.		* Switch @rt nhop/weigh to the ones specified in @rnd.
* Conditionally set rt_expire if set in @info.		* Conditionally set rt_expire if set in @info.
* Returns 0 on success.		* Returns 0 on success.
*/		*/
static int		int
change_route_nhop(struct rib_head rnh, struct rtentry rt,		change_route_nhop(struct rib_head rnh, struct rtentry rt,
struct rt_addrinfo info, struct route_nhop_data rnd,		struct rt_addrinfo info, struct route_nhop_data rnd,
struct rib_cmd_info *rc)		struct rib_cmd_info *rc)
{		{
struct nhop_object *nh_orig;		struct nhop_object *nh_orig;

RIB_WLOCK_ASSERT(rnh);		RIB_WLOCK_ASSERT(rnh);

nh_orig = rt->rt_nhop;		nh_orig = rt->rt_nhop;

if (rnd->rnd_nhop != NULL) {		if (rnd->rnd_nhop != NULL) {
/* Changing expiration & nexthop & weight to a new one */		/* Changing expiration & nexthop & weight to a new one */
rt_setmetrics(info, rt);		rt_set_expire_info(rt, info);
rt->rt_nhop = rnd->rnd_nhop;		rt->rt_nhop = rnd->rnd_nhop;
rt->rt_weight = rnd->rnd_weight;		rt->rt_weight = rnd->rnd_weight;
if (rt->rt_expire > 0)		if (rt->rt_expire > 0)
tmproutes_update(rnh, rt);		tmproutes_update(rnh, rt);
} else {		} else {
/* Route deletion requested. */		/* Route deletion requested. */
struct sockaddr ndst, netmask;		struct sockaddr ndst, netmask;
struct radix_node *rn;		struct radix_node *rn;

ndst = (struct sockaddr *)rt_key(rt);		ndst = (struct sockaddr *)rt_key(rt);
netmask = info->rti_info[RTAX_NETMASK];		netmask = info->rti_info[RTAX_NETMASK];
rn = rnh->rnh_deladdr(ndst, netmask, &rnh->head);		rn = rnh->rnh_deladdr(ndst, netmask, &rnh->head);
if (rn == NULL)		if (rn == NULL)
return (ESRCH);		return (ESRCH);
		rt = RNTORT(rn);
		rt->rte_flags &= ~RTF_UP;
}		}

/* Finalize notification */		/* Finalize notification */
rnh->rnh_gen++;		rnh->rnh_gen++;

rc->rc_cmd = (rnd->rnd_nhop != NULL) ? RTM_CHANGE : RTM_DELETE;		rc->rc_cmd = (rnd->rnd_nhop != NULL) ? RTM_CHANGE : RTM_DELETE;
rc->rc_rt = rt;		rc->rc_rt = rt;
rc->rc_nh_old = nh_orig;		rc->rc_nh_old = nh_orig;
▲ Show 20 Lines • Show All 129 Lines • ▼ Show 20 Lines	rt_checkdelroute(struct radix_node rn, void arg)

/*		/*
* Add deleted rtentries to the list to GC them		* Add deleted rtentries to the list to GC them
* after dropping the lock.		* after dropping the lock.
*		*
* XXX: Delayed notifications not implemented		* XXX: Delayed notifications not implemented
* for nexthop updates.		* for nexthop updates.
*/		*/
if (error == 0) {		if ((error == 0) && (di->rc.rc_cmd == RTM_DELETE)) {
/* Add to the list and return */		/* Add to the list and return */
rt->rt_chain = di->head;		rt->rt_chain = di->head;
di->head = rt;		di->head = rt;
}		}

return (0);		return (0);
}		}

▲ Show 20 Lines • Show All 201 Lines • Show Last 20 Lines