#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
((value) < (thresh) ? (value) : \
- ((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
+ ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
#define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
-#define IPV6_MLD_MAX_MSF 10
+#define IPV6_MLD_MAX_MSF 64
int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
mc_lst->ifindex = dev->ifindex;
mc_lst->sfmode = MCAST_EXCLUDE;
+ rwlock_init(&mc_lst->sflock);
mc_lst->sflist = NULL;
/*
struct ip6_sf_socklist *psl;
int i, j, rv;
int leavegroup = 0;
+ int pmclocked = 0;
int err;
if (pgsr->gsr_group.ss_family != AF_INET6 ||
pmc->sfmode = omode;
}
+ write_lock_bh(&pmc->sflock);
+ pmclocked = 1;
+
psl = pmc->sflist;
if (!add) {
if (!psl)
if (psl)
count += psl->sl_max;
- newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
- IP6_SFLSIZE(count), GFP_ATOMIC);
+ newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
if (!newpsl) {
err = -ENOBUFS;
goto done;
/* update the interface list */
ip6_mc_add_src(idev, group, omode, 1, source, 1);
done:
+ if (pmclocked)
+ write_unlock_bh(&pmc->sflock);
read_unlock_bh(&ipv6_sk_mc_lock);
read_unlock_bh(&idev->lock);
in6_dev_put(idev);
dev = idev->dev;
err = 0;
+ read_lock_bh(&ipv6_sk_mc_lock);
+
if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
leavegroup = 1;
goto done;
goto done;
}
if (gsf->gf_numsrc) {
- newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
- IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
+ newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
+ GFP_ATOMIC);
if (!newpsl) {
err = -ENOBUFS;
goto done;
sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
goto done;
}
- } else
+ } else {
newpsl = NULL;
+ (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
+ }
+
+ write_lock_bh(&pmc->sflock);
psl = pmc->sflist;
if (psl) {
(void) ip6_mc_del_src(idev, group, pmc->sfmode,
(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
pmc->sflist = newpsl;
pmc->sfmode = gsf->gf_fmode;
+ write_unlock_bh(&pmc->sflock);
err = 0;
done:
+ read_unlock_bh(&ipv6_sk_mc_lock);
read_unlock_bh(&idev->lock);
in6_dev_put(idev);
dev_put(dev);
dev = idev->dev;
err = -EADDRNOTAVAIL;
+ /*
+ * changes to the ipv6_mc_list require the socket lock and
+ * a read lock on ip6_sk_mc_lock. We have the socket lock,
+ * so reading the list is safe.
+ */
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
if (pmc->ifindex != gsf->gf_interface)
copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
return -EFAULT;
}
+ /* changes to psl require the socket lock, a read lock on
+ * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
+ * have the socket lock, so reading here is safe.
+ */
for (i=0; i<copycount; i++) {
struct sockaddr_in6 *psin6;
struct sockaddr_storage ss;
read_unlock(&ipv6_sk_mc_lock);
return 1;
}
+ read_lock(&mc->sflock);
psl = mc->sflist;
if (!psl) {
rv = mc->sfmode == MCAST_EXCLUDE;
if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
rv = 0;
}
+ read_unlock(&mc->sflock);
read_unlock(&ipv6_sk_mc_lock);
return rv;
* for deleted items allows change reports to use common code with
* non-deleted or query-response MCA's.
*/
- pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
+ pmc = kmalloc(sizeof(*pmc), GFP_ATOMIC);
if (!pmc)
return;
memset(pmc, 0, sizeof(*pmc));
ma->mca_flags |= MAF_TIMER_RUNNING;
}
-static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
+/* mark EXCLUDE-mode sources */
+static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
struct in6_addr *srcs)
{
struct ip6_sf_list *psf;
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
if (scount == nsrcs)
break;
- for (i=0; i<nsrcs; i++)
+ for (i=0; i<nsrcs; i++) {
+ /* skip inactive filters */
+ if (pmc->mca_sfcount[MCAST_INCLUDE] ||
+ pmc->mca_sfcount[MCAST_EXCLUDE] !=
+ psf->sf_count[MCAST_EXCLUDE])
+ continue;
+ if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
+ scount++;
+ break;
+ }
+ }
+ }
+ pmc->mca_flags &= ~MAF_GSQUERY;
+ if (scount == nsrcs) /* all sources excluded */
+ return 0;
+ return 1;
+}
+
+static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
+ struct in6_addr *srcs)
+{
+ struct ip6_sf_list *psf;
+ int i, scount;
+
+ if (pmc->mca_sfmode == MCAST_EXCLUDE)
+ return mld_xmarksources(pmc, nsrcs, srcs);
+
+ /* mark INCLUDE-mode sources */
+
+ scount = 0;
+ for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+ if (scount == nsrcs)
+ break;
+ for (i=0; i<nsrcs; i++) {
if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
psf->sf_gsresp = 1;
scount++;
break;
}
+ }
+ }
+ if (!scount) {
+ pmc->mca_flags &= ~MAF_GSQUERY;
+ return 0;
}
+ pmc->mca_flags |= MAF_GSQUERY;
+ return 1;
}
int igmp6_event_query(struct sk_buff *skb)
{
- struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
+ struct mld2_query *mlh2 = NULL;
struct ifmcaddr6 *ma;
struct in6_addr *group;
unsigned long max_delay;
/* clear deleted report items */
mld_clear_delrec(idev);
} else if (len >= 28) {
+ int srcs_offset = sizeof(struct mld2_query) -
+ sizeof(struct icmp6hdr);
+ if (!pskb_may_pull(skb, srcs_offset)) {
+ in6_dev_put(idev);
+ return -EINVAL;
+ }
+ mlh2 = (struct mld2_query *) skb->h.raw;
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
if (!max_delay)
max_delay = 1;
return 0;
}
/* mark sources to include, if group & source-specific */
- mark = mlh2->nsrcs != 0;
+ if (mlh2->nsrcs != 0) {
+ if (!pskb_may_pull(skb, srcs_offset +
+ ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
+ in6_dev_put(idev);
+ return -EINVAL;
+ }
+ mlh2 = (struct mld2_query *) skb->h.raw;
+ mark = 1;
+ }
} else {
in6_dev_put(idev);
return -EINVAL;
}
} else {
for (ma = idev->mc_list; ma; ma=ma->next) {
- if (group_type != IPV6_ADDR_ANY &&
- !ipv6_addr_equal(group, &ma->mca_addr))
+ if (!ipv6_addr_equal(group, &ma->mca_addr))
continue;
spin_lock_bh(&ma->mca_lock);
if (ma->mca_flags & MAF_TIMER_RUNNING) {
else
ma->mca_flags &= ~MAF_GSQUERY;
}
- if (ma->mca_flags & MAF_GSQUERY)
- mld_marksources(ma, ntohs(mlh2->nsrcs),
- mlh2->srcs);
- igmp6_group_queried(ma, max_delay);
+ if (!(ma->mca_flags & MAF_GSQUERY) ||
+ mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
+ igmp6_group_queried(ma, max_delay);
spin_unlock_bh(&ma->mca_lock);
- if (group_type != IPV6_ADDR_ANY)
- break;
+ break;
}
}
read_unlock_bh(&idev->lock);
if (skb->pkt_type == PACKET_LOOPBACK)
return 0;
+ /* send our report if the MC router may not have heard this report */
+ if (skb->pkt_type != PACKET_MULTICAST &&
+ skb->pkt_type != PACKET_BROADCAST)
+ return 0;
+
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
return -EINVAL;
case MLD2_MODE_IS_EXCLUDE:
if (gdeleted || sdeleted)
return 0;
- return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
+ if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
+ if (pmc->mca_sfmode == MCAST_INCLUDE)
+ return 1;
+ /* don't include if this source is excluded
+ * in all filters
+ */
+ if (psf->sf_count[MCAST_INCLUDE])
+ return type == MLD2_MODE_IS_INCLUDE;
+ return pmc->mca_sfcount[MCAST_EXCLUDE] ==
+ psf->sf_count[MCAST_EXCLUDE];
+ }
+ return 0;
case MLD2_CHANGE_TO_INCLUDE:
if (gdeleted || sdeleted)
return 0;
struct mld2_report *pmr;
struct mld2_grec *pgr = NULL;
struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
- int scount, first, isquery, truncate;
+ int scount, stotal, first, isquery, truncate;
if (pmc->mca_flags & MAF_NOREPORT)
return skb;
truncate = type == MLD2_MODE_IS_EXCLUDE ||
type == MLD2_CHANGE_TO_EXCLUDE;
+ stotal = scount = 0;
+
psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
- if (!*psf_list) {
- if (type == MLD2_ALLOW_NEW_SOURCES ||
- type == MLD2_BLOCK_OLD_SOURCES)
- return skb;
- if (pmc->mca_crcount || isquery) {
- /* make sure we have room for group header and at
- * least one source.
- */
- if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
- sizeof(struct in6_addr)) {
- mld_sendpack(skb);
- skb = NULL; /* add_grhead will get a new one */
- }
- skb = add_grhead(skb, pmc, type, &pgr);
- }
- return skb;
- }
+ if (!*psf_list)
+ goto empty_source;
+
pmr = skb ? (struct mld2_report *)skb->h.raw : NULL;
/* EX and TO_EX get a fresh packet, if needed */
}
}
first = 1;
- scount = 0;
psf_prev = NULL;
for (psf=*psf_list; psf; psf=psf_next) {
struct in6_addr *psrc;
}
psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
*psrc = psf->sf_addr;
- scount++;
+ scount++; stotal++;
if ((type == MLD2_ALLOW_NEW_SOURCES ||
type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
psf->sf_crcount--;
}
psf_prev = psf;
}
+
+empty_source:
+ if (!stotal) {
+ if (type == MLD2_ALLOW_NEW_SOURCES ||
+ type == MLD2_BLOCK_OLD_SOURCES)
+ return skb;
+ if (pmc->mca_crcount || isquery) {
+ /* make sure we have room for group header */
+ if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
+ mld_sendpack(skb);
+ skb = NULL; /* add_grhead will get a new one */
+ }
+ skb = add_grhead(skb, pmc, type, &pgr);
+ }
+ }
if (pgr)
pgr->grec_nsrcs = htons(scount);
skb = add_grec(skb, pmc, dtype, 1, 1);
}
if (pmc->mca_crcount) {
- pmc->mca_crcount--;
if (pmc->mca_sfmode == MCAST_EXCLUDE) {
type = MLD2_CHANGE_TO_INCLUDE;
skb = add_grec(skb, pmc, type, 1, 0);
}
+ pmc->mca_crcount--;
if (pmc->mca_crcount == 0) {
mld_clear_zeros(&pmc->mca_tomb);
mld_clear_zeros(&pmc->mca_sources);
/* filter mode changes */
if (pmc->mca_crcount) {
- pmc->mca_crcount--;
if (pmc->mca_sfmode == MCAST_EXCLUDE)
type = MLD2_CHANGE_TO_EXCLUDE;
else
type = MLD2_CHANGE_TO_INCLUDE;
skb = add_grec(skb, pmc, type, 0, 0);
+ pmc->mca_crcount--;
}
spin_unlock_bh(&pmc->mca_lock);
}
psf_prev = psf;
}
if (!psf) {
- psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
+ psf = kmalloc(sizeof(*psf), GFP_ATOMIC);
if (!psf)
return -ENOBUFS;
memset(psf, 0, sizeof(*psf));
static int sf_setstate(struct ifmcaddr6 *pmc)
{
- struct ip6_sf_list *psf;
+ struct ip6_sf_list *psf, *dpsf;
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
int qrv = pmc->idev->mc_qrv;
int new_in, rv;
!psf->sf_count[MCAST_INCLUDE];
} else
new_in = psf->sf_count[MCAST_INCLUDE] != 0;
- if (new_in != psf->sf_oldin) {
- psf->sf_crcount = qrv;
+ if (new_in) {
+ if (!psf->sf_oldin) {
+ struct ip6_sf_list *prev = NULL;
+
+ for (dpsf=pmc->mca_tomb; dpsf;
+ dpsf=dpsf->sf_next) {
+ if (ipv6_addr_equal(&dpsf->sf_addr,
+ &psf->sf_addr))
+ break;
+ prev = dpsf;
+ }
+ if (dpsf) {
+ if (prev)
+ prev->sf_next = dpsf->sf_next;
+ else
+ pmc->mca_tomb = dpsf->sf_next;
+ kfree(dpsf);
+ }
+ psf->sf_crcount = qrv;
+ rv++;
+ }
+ } else if (psf->sf_oldin) {
+ psf->sf_crcount = 0;
+ /*
+ * add or update "delete" records if an active filter
+ * is now inactive
+ */
+ for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
+ if (ipv6_addr_equal(&dpsf->sf_addr,
+ &psf->sf_addr))
+ break;
+ if (!dpsf) {
+ dpsf = (struct ip6_sf_list *)
+ kmalloc(sizeof(*dpsf), GFP_ATOMIC);
+ if (!dpsf)
+ continue;
+ *dpsf = *psf;
+ /* pmc->mca_lock held by callers */
+ dpsf->sf_next = pmc->mca_tomb;
+ pmc->mca_tomb = dpsf;
+ }
+ dpsf->sf_crcount = qrv;
rv++;
}
}
{
int err;
+ /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
+ * so no other readers or writers of iml or its sflist
+ */
if (iml->sflist == 0) {
/* any-source empty exclude case */
return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
seq_printf(seq,
- "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n",
+ "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n",
state->dev->ifindex, state->dev->name,
NIP6(im->mca_addr),
im->mca_users, im->mca_flags,
"Source Address", "INC", "EXC");
} else {
seq_printf(seq,
- "%3d %6.6s "
- "%04x%04x%04x%04x%04x%04x%04x%04x "
- "%04x%04x%04x%04x%04x%04x%04x%04x "
- "%6lu %6lu\n",
+ "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n",
state->dev->ifindex, state->dev->name,
NIP6(state->im->mca_addr),
NIP6(psf->sf_addr),
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff