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r333175 introduced deferred deletion of multicast addresses in order to permit the driver ioctl

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to sleep on commands to the NIC when updating multicast filters. More generally this permitted
driver's to use an sx as a softc lock. Unfortunately this change introduced a race whereby a
a multicast update would still be queued for deletion when ifconfig deleted the interface
thus calling down in to _purgemaddrs and synchronously deleting _all_ of the multicast addresses
on the interface.

Synchronously remove all external references to a multicast address before enqueueing for delete.

Reported by:	lwhsu
Approved by:	sbruno
This commit is contained in:
mmacy 2018-05-06 20:34:13 +00:00
parent e532109522
commit d3f138323c
10 changed files with 195 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
sys/net/if.c
View File

@ -254,7 +254,6 @@ struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
static void if_attachdomain(void *);
static void if_attachdomain1(struct ifnet *);
static int ifconf(u_long, caddr_t);
static void if_freemulti(struct ifmultiaddr *);
static void if_grow(void);
static void if_input_default(struct ifnet *, struct mbuf *);
static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
@ -3395,7 +3394,10 @@ if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
* counting, notifying the driver, handling routing messages, and releasing
* any dependent link layer state.
*/
static void
#ifdef MCAST_VERBOSE
extern void kdb_backtrace(void);
#endif
void
if_freemulti(struct ifmultiaddr *ifma)
{
@ -3404,6 +3406,10 @@ if_freemulti(struct ifmultiaddr *ifma)
if (ifma->ifma_lladdr != NULL)
free(ifma->ifma_lladdr, M_IFMADDR);
#ifdef MCAST_VERBOSE
kdb_backtrace();
printf("%s freeing ifma: %p\n", __func__, ifma);
#endif
free(ifma->ifma_addr, M_IFMADDR);
free(ifma, M_IFMADDR);
}
@ -3610,6 +3616,12 @@ if_delallmulti(struct ifnet *ifp)
IF_ADDR_WUNLOCK(ifp);
}
void
if_delmulti_ifma(struct ifmultiaddr *ifma)
{
if_delmulti_ifma_flags(ifma, 0);
}
/*
* Delete a multicast group membership by group membership pointer.
* Network-layer protocol domains must use this routine.
@ -3617,11 +3629,11 @@ if_delallmulti(struct ifnet *ifp)
* It is safe to call this routine if the ifp disappeared.
*/
void
if_delmulti_ifma(struct ifmultiaddr *ifma)
if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
{
struct ifnet *ifp;
int lastref;
MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
#ifdef INET
IN_MULTI_LIST_UNLOCK_ASSERT();
#endif
@ -3649,7 +3661,7 @@ if_delmulti_ifma(struct ifmultiaddr *ifma)
if (ifp != NULL)
IF_ADDR_WLOCK(ifp);
lastref = if_delmulti_locked(ifp, ifma, 0);
lastref = if_delmulti_locked(ifp, ifma, flags);
if (ifp != NULL) {
/*
@ -3683,6 +3695,7 @@ if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
}
ifp = ifma->ifma_ifp;
MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
/*
* If the ifnet is detaching, null out references to ifnet,
@ -3708,6 +3721,9 @@ if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
if (--ifma->ifma_refcount > 0)
return 0;
if (ifp != NULL && detaching == 0)
TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
/*
* If this ifma is a network-layer ifma, a link-layer ifma may
* have been associated with it. Release it first if so.
@ -3726,11 +3742,15 @@ if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
if_freemulti(ll_ifma);
}
}
if (ifp != NULL && detaching == 0)
TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
#ifdef INVARIANTS
if (ifp) {
struct ifmultiaddr *ifmatmp;
TAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
MPASS(ifma != ifmatmp);
}
#endif
if_freemulti(ifma);
/*
* The last reference to this instance of struct ifmultiaddr
* was released; the hardware should be notified of this change.

8
sys/net/if_var.h
View File

@ -596,6 +596,12 @@ VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */
#define V_if_index VNET(if_index)
#define V_loif VNET(loif)
#ifdef MCAST_VERBOSE
#define MCDPRINTF printf
#else
#define MCDPRINTF(...)
#endif
int if_addgroup(struct ifnet *, const char *);
int if_delgroup(struct ifnet *, const char *);
int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
@ -605,12 +611,14 @@ void if_attach(struct ifnet *);
void if_dead(struct ifnet *);
int if_delmulti(struct ifnet *, struct sockaddr *);
void if_delmulti_ifma(struct ifmultiaddr *);
void if_delmulti_ifma_flags(struct ifmultiaddr *, int flags);
void if_detach(struct ifnet *);
void if_purgeaddrs(struct ifnet *);
void if_delallmulti(struct ifnet *);
void if_down(struct ifnet *);
struct ifmultiaddr *
if_findmulti(struct ifnet *, const struct sockaddr *);
void if_freemulti(struct ifmultiaddr *ifma);
void if_free(struct ifnet *);
void if_initname(struct ifnet *, const char *, int);
void if_link_state_change(struct ifnet *, int);

30
sys/netinet/igmp.c
View File

@ -610,7 +610,7 @@ void
igmp_ifdetach(struct ifnet *ifp)
{
struct igmp_ifsoftc *igi;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
struct in_multi *inm;
struct in_multi_head inm_free_tmp;
CTR3(KTR_IGMPV3, "%s: called for ifp %p(%s)", __func__, ifp,
@ -621,21 +621,22 @@ igmp_ifdetach(struct ifnet *ifp)
igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp;
if (igi->igi_version == IGMP_VERSION_3) {
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET ||
ifma->ifma_protospec == NULL)
continue;
#if 0
KASSERT(ifma->ifma_protospec != NULL,
("%s: ifma_protospec is NULL", __func__));
#endif
inm = (struct in_multi *)ifma->ifma_protospec;
if (inm->inm_state == IGMP_LEAVING_MEMBER)
inm_rele_locked(&inm_free_tmp, inm);
inm_clear_recorded(inm);
if (__predict_false(ifma_restart)) {
ifma_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
inm_release_list_deferred(&inm_free_tmp);
}
IGMP_UNLOCK();
@ -1631,7 +1632,7 @@ igmp_fasttimo_vnet(void)
struct mbufq qrq; /* Query response packets */
struct ifnet *ifp;
struct igmp_ifsoftc *igi;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
struct in_multi *inm;
struct in_multi_head inm_free_tmp;
int loop, uri_fasthz;
@ -1695,8 +1696,9 @@ igmp_fasttimo_vnet(void)
mbufq_init(&scq, IGMP_MAX_STATE_CHANGE_PACKETS);
}
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET ||
ifma->ifma_protospec == NULL)
continue;
@ -1712,8 +1714,12 @@ igmp_fasttimo_vnet(void)
&scq, inm, uri_fasthz);
break;
}
if (__predict_false(ifma_restart)) {
ifma_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
if (igi->igi_version == IGMP_VERSION_3) {
igmp_dispatch_queue(&qrq, 0, loop);

17
sys/netinet/in.c
View File

@ -1012,7 +1012,7 @@ in_purgemaddrs(struct ifnet *ifp)
{
struct in_multi_head purgeinms;
struct in_multi *inm;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
SLIST_INIT(&purgeinms);
IN_MULTI_LIST_LOCK();
@ -1023,19 +1023,20 @@ in_purgemaddrs(struct ifnet *ifp)
* We need to do this as IF_ADDR_LOCK() may be re-acquired
* by code further down.
*/
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET ||
ifma->ifma_protospec == NULL)
continue;
#if 0
KASSERT(ifma->ifma_protospec != NULL,
("%s: ifma_protospec is NULL", __func__));
#endif
inm = (struct in_multi *)ifma->ifma_protospec;
inm_rele_locked(&purgeinms, inm);
if (__predict_false(ifma_restart)) {
ifma_restart = true;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
inm_release_list_deferred(&purgeinms);
igmp_ifdetach(ifp);

40
sys/netinet/in_mcast.c
View File

@ -112,6 +112,8 @@ MTX_SYSINIT(in_multi_free_mtx, &in_multi_free_mtx, "in_multi_free_mtx", MTX_DEF)
struct sx in_multi_sx;
SX_SYSINIT(in_multi_sx, &in_multi_sx, "in_multi_sx");
int ifma_restart;
/*
* Functions with non-static linkage defined in this file should be
* declared in in_var.h:
@ -251,6 +253,33 @@ inm_release_list_deferred(struct in_multi_head *inmh)
GROUPTASK_ENQUEUE(&free_gtask);
}
void
inm_disconnect(struct in_multi *inm)
{
struct ifnet *ifp;
struct ifmultiaddr *ifma, *ll_ifma;
ifp = inm->inm_ifp;
IF_ADDR_WLOCK_ASSERT(ifp);
ifma = inm->inm_ifma;
if_ref(ifp);
TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
MCDPRINTF("removed ifma: %p from %s\n", ifma, ifp->if_xname);
if ((ll_ifma = ifma->ifma_llifma) != NULL) {
MPASS(ifma != ll_ifma);
ifma->ifma_llifma = NULL;
MPASS(ll_ifma->ifma_llifma == NULL);
MPASS(ll_ifma->ifma_ifp == ifp);
if (--ll_ifma->ifma_refcount == 0) {
TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifma_link);
MCDPRINTF("removed ll_ifma: %p from %s\n", ll_ifma, ifp->if_xname);
if_freemulti(ll_ifma);
ifma_restart = true;
}
}
}
void
inm_release_deferred(struct in_multi *inm)
{
@ -260,6 +289,7 @@ inm_release_deferred(struct in_multi *inm)
MPASS(inm->inm_refcount > 0);
if (--inm->inm_refcount == 0) {
SLIST_INIT(&tmp);
inm_disconnect(inm);
inm->inm_ifma->ifma_protospec = NULL;
SLIST_INSERT_HEAD(&tmp, inm, inm_nrele);
inm_release_list_deferred(&tmp);
@ -643,9 +673,11 @@ inm_release(struct in_multi *inm)
inm_purge(inm);
free(inm, M_IPMADDR);
if_delmulti_ifma(ifma);
if (ifp)
if_delmulti_ifma_flags(ifma, 1);
if (ifp) {
CURVNET_RESTORE();
if_rele(ifp);
}
}
/*
@ -1270,7 +1302,6 @@ in_joingroup_locked(struct ifnet *ifp, const struct in_addr *gina,
}
out_inm_release:
IN_MULTI_LIST_UNLOCK();
if (error) {
CTR2(KTR_IGMPV3, "%s: dropping ref on %p", __func__, inm);
@ -1278,6 +1309,7 @@ in_joingroup_locked(struct ifnet *ifp, const struct in_addr *gina,
} else {
*pinm = inm;
}
IN_MULTI_LIST_UNLOCK();
return (error);
}
@ -1350,7 +1382,9 @@ in_leavegroup_locked(struct in_multi *inm, /*const*/ struct in_mfilter *imf)
CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__);
CURVNET_SET(inm->inm_ifp->if_vnet);
error = igmp_change_state(inm);
IF_ADDR_WLOCK(inm->inm_ifp);
inm_release_deferred(inm);
IF_ADDR_WUNLOCK(inm->inm_ifp);
IN_MULTI_LIST_UNLOCK();
CURVNET_RESTORE();
if (error)

4
sys/netinet/in_var.h
View File

@ -343,6 +343,9 @@ extern struct sx in_multi_sx;
#define IN_MULTI_LOCK_ASSERT() sx_assert(&in_multi_sx, SA_XLOCKED)
#define IN_MULTI_UNLOCK_ASSERT() sx_assert(&in_multi_sx, SA_XUNLOCKED)
void inm_disconnect(struct in_multi *inm);
extern int ifma_restart;
/* Acquire an in_multi record. */
static __inline void
inm_acquire_locked(struct in_multi *inm)
@ -368,6 +371,7 @@ inm_rele_locked(struct in_multi_head *inmh, struct in_multi *inm)
if (--inm->inm_refcount == 0) {
MPASS(inmh != NULL);
inm_disconnect(inm);
inm->inm_ifma->ifma_protospec = NULL;
SLIST_INSERT_HEAD(inmh, inm, inm_nrele);
}

15
sys/netinet6/in6_ifattach.c
View File

@ -848,26 +848,29 @@ in6_purgemaddrs(struct ifnet *ifp)
{
struct in6_multi_head purgeinms;
struct in6_multi *inm;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
SLIST_INIT(&purgeinms);
IN6_MULTI_LOCK();
IN6_MULTI_LIST_LOCK();
IF_ADDR_WLOCK(ifp);
/*
* Extract list of in6_multi associated with the detaching ifp
* which the PF_INET6 layer is about to release.
* We need to do this as IF_ADDR_LOCK() may be re-acquired
* by code further down.
*/
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET6 ||
ifma->ifma_protospec == NULL)
continue;
inm = (struct in6_multi *)ifma->ifma_protospec;
in6m_rele_locked(&purgeinms, inm);
if (__predict_false(ifma6_restart)) {
ifma6_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
mld_ifdetach(ifp);
IN6_MULTI_LIST_UNLOCK();
IN6_MULTI_UNLOCK();

66
sys/netinet6/in6_mcast.c
View File

@ -190,6 +190,7 @@ static SYSCTL_NODE(_net_inet6_ip6_mcast, OID_AUTO, filters,
CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_ip6_mcast_filters,
"Per-interface stack-wide source filters");
int ifma6_restart = 0;
#ifdef KTR
/*
* Inline function which wraps assertions for a valid ifp.
@ -531,6 +532,7 @@ in6m_release(struct in6_multi *inm)
ifma = inm->in6m_ifma;
ifp = inm->in6m_ifp;
MPASS(ifma->ifma_llifma == NULL);
/* XXX this access is not covered by IF_ADDR_LOCK */
CTR2(KTR_MLD, "%s: purging ifma %p", __func__, ifma);
@ -542,9 +544,11 @@ in6m_release(struct in6_multi *inm)
in6m_purge(inm);
free(inm, M_IP6MADDR);
if_delmulti_ifma(ifma);
if (ifp)
if_delmulti_ifma_flags(ifma, 1);
if (ifp) {
CURVNET_RESTORE();
if_rele(ifp);
}
}
static struct grouptask free_gtask;
@ -572,30 +576,58 @@ in6m_release_list_deferred(struct in6_multi_head *inmh)
}
void
in6m_release_deferred(struct in6_multi *inm)
in6m_disconnect(struct in6_multi *inm)
{
struct in6_multi_head tmp;
struct ifnet *ifp;
struct ifaddr *ifa;
struct in6_ifaddr *ifa6;
struct in6_multi_mship *imm;
struct ifmultiaddr *ifma, *ll_ifma;
ifp = inm->in6m_ifp;
IF_ADDR_WLOCK_ASSERT(ifp);
ifma = inm->in6m_ifma;
if_ref(ifp);
TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
MCDPRINTF("removed ifma: %p from %s\n", ifma, ifp->if_xname);
if ((ll_ifma = ifma->ifma_llifma) != NULL) {
MPASS(ifma != ll_ifma);
ifma->ifma_llifma = NULL;
MPASS(ll_ifma->ifma_llifma == NULL);
MPASS(ll_ifma->ifma_ifp == ifp);
if (--ll_ifma->ifma_refcount == 0) {
ifma6_restart = true;
TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifma_link);
MCDPRINTF("removed ll_ifma: %p from %s\n", ll_ifma, ifp->if_xname);
if_freemulti(ll_ifma);
}
}
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifa6 = (void *)ifa;
LIST_FOREACH(imm, &ifa6->ia6_memberships, i6mm_chain) {
if (inm == imm->i6mm_maddr) {
LIST_REMOVE(imm, i6mm_chain);
free(imm, M_IP6MADDR);
}
}
}
}
void
in6m_release_deferred(struct in6_multi *inm)
{
struct in6_multi_head tmp;
IN6_MULTI_LIST_LOCK_ASSERT();
KASSERT(inm->in6m_refcount > 0, ("refcount == %d inm: %p", inm->in6m_refcount, inm));
if (--inm->in6m_refcount == 0) {
ifp = inm->in6m_ifp;
IF_ADDR_LOCK_ASSERT(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifa6 = (void *)ifa;
LIST_FOREACH(imm, &ifa6->ia6_memberships, i6mm_chain) {
if (inm == imm->i6mm_maddr)
imm->i6mm_maddr = NULL;
}
}
in6m_disconnect(inm);
SLIST_INIT(&tmp);
inm->in6m_ifma->ifma_protospec = NULL;
MPASS(inm->in6m_ifma->ifma_llifma == NULL);
SLIST_INSERT_HEAD(&tmp, inm, in6m_nrele);
in6m_release_list_deferred(&tmp);
}
@ -1355,10 +1387,10 @@ in6_leavegroup_locked(struct in6_multi *inm, /*const*/ struct in6_mfilter *imf)
CTR2(KTR_MLD, "%s: dropping ref on %p", __func__, inm);
if (ifp)
IF_ADDR_RLOCK(ifp);
IF_ADDR_WLOCK(ifp);
in6m_release_deferred(inm);
if (ifp)
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
IN6_MULTI_LIST_UNLOCK();
return (error);

22
sys/netinet6/in6_var.h
View File

@ -670,6 +670,8 @@ struct in6_multi {
} in6m_st[2]; /* state at t0, t1 */
};
void in6m_disconnect(struct in6_multi *inm);
extern int ifma6_restart;
/*
* Helper function to derive the filter mode on a source entry
* from its internal counters. Predicates are:
@ -711,6 +713,7 @@ extern struct sx in6_multi_sx;
#define IN6_MULTI_LOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XLOCKED)
#define IN6_MULTI_UNLOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XUNLOCKED)
/*
* Look up an in6_multi record for an IPv6 multicast address
* on the interface ifp.
@ -779,28 +782,13 @@ in6m_acquire(struct in6_multi *inm)
static __inline void
in6m_rele_locked(struct in6_multi_head *inmh, struct in6_multi *inm)
{
struct ifnet *ifp;
struct ifaddr *ifa;
struct in6_ifaddr *ifa6;
struct in6_multi_mship *imm;
KASSERT(inm->in6m_refcount > 0, ("refcount == %d inm: %p", inm->in6m_refcount, inm));
IN6_MULTI_LIST_LOCK_ASSERT();
if (--inm->in6m_refcount == 0) {
ifp = inm->in6m_ifp;
IF_ADDR_LOCK_ASSERT(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifa6 = (void *)ifa;
LIST_FOREACH(imm, &ifa6->ia6_memberships, i6mm_chain) {
if (inm == imm->i6mm_maddr)
imm->i6mm_maddr = NULL;
}
}
in6m_disconnect(inm);
inm->in6m_ifma->ifma_protospec = NULL;
MPASS(inm->in6m_ifma->ifma_llifma == NULL);
SLIST_INSERT_HEAD(inmh, inm, in6m_nrele);
}
}

41
sys/netinet6/mld6.c
View File

@ -536,7 +536,7 @@ void
mld_ifdetach(struct ifnet *ifp)
{
struct mld_ifsoftc *mli;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
struct in6_multi *inm;
struct in6_multi_head inmh;
@ -549,8 +549,9 @@ mld_ifdetach(struct ifnet *ifp)
mli = MLD_IFINFO(ifp);
if (mli->mli_version == MLD_VERSION_2) {
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET6 ||
ifma->ifma_protospec == NULL)
continue;
@ -560,8 +561,12 @@ mld_ifdetach(struct ifnet *ifp)
ifma->ifma_protospec = NULL;
}
in6m_clear_recorded(inm);
if (__predict_false(ifma6_restart)) {
ifma6_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
}
MLD_UNLOCK();
@ -696,7 +701,7 @@ mld_v1_input_query(struct ifnet *ifp, const struct ip6_hdr *ip6,
* interface, kick the report timer.
*/
CTR2(KTR_MLD, "process v1 general query on ifp %p(%s)",
ifp, if_name(ifp));
ifp, if_name(ifp));
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_INET6 ||
ifma->ifma_protospec == NULL)
@ -1326,7 +1331,7 @@ mld_fasttimo_vnet(void)
struct mbufq qrq; /* Query response packets */
struct ifnet *ifp;
struct mld_ifsoftc *mli;
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
struct in6_multi *inm, *tinm;
struct in6_multi_head inmh;
int uri_fasthz;
@ -1388,8 +1393,9 @@ mld_fasttimo_vnet(void)
mbufq_init(&scq, MLD_MAX_STATE_CHANGE_PACKETS);
}
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET6 ||
ifma->ifma_protospec == NULL)
continue;
@ -1403,8 +1409,12 @@ mld_fasttimo_vnet(void)
&scq, inm, uri_fasthz);
break;
}
if (__predict_false(ifma6_restart)) {
ifma6_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
switch (mli->mli_version) {
case MLD_VERSION_1:
@ -1641,7 +1651,7 @@ mld_set_version(struct mld_ifsoftc *mli, const int version)
static void
mld_v2_cancel_link_timers(struct mld_ifsoftc *mli)
{
struct ifmultiaddr *ifma;
struct ifmultiaddr *ifma, *next;
struct ifnet *ifp;
struct in6_multi *inm;
struct in6_multi_head inmh;
@ -1666,8 +1676,9 @@ mld_v2_cancel_link_timers(struct mld_ifsoftc *mli)
ifp = mli->mli_ifp;
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
IF_ADDR_WLOCK(ifp);
restart:
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) {
if (ifma->ifma_addr->sa_family != AF_INET6)
continue;
inm = (struct in6_multi *)ifma->ifma_protospec;
@ -1702,8 +1713,12 @@ mld_v2_cancel_link_timers(struct mld_ifsoftc *mli)
mbufq_drain(&inm->in6m_scq);
break;
}
if (__predict_false(ifma6_restart)) {
ifma6_restart = false;
goto restart;
}
}
IF_ADDR_RUNLOCK(ifp);
IF_ADDR_WUNLOCK(ifp);
in6m_release_list_deferred(&inmh);
}