static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
static DEFINE_RWLOCK(addrconf_hash_lock);
-/* Protects inet6 devices */
-DEFINE_RWLOCK(addrconf_lock);
-
static void addrconf_verify(unsigned long);
static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
.accept_ra_rt_info_max_plen = 0,
#endif
#endif
+ .proxy_ndp = 0,
};
static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
.accept_ra_rt_info_max_plen = 0,
#endif
#endif
+ .proxy_ndp = 0,
};
/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
/* Nobody refers to this device, we may destroy it. */
+static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
+{
+ struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
+ kfree(idev);
+}
+
void in6_dev_finish_destroy(struct inet6_dev *idev)
{
struct net_device *dev = idev->dev;
return;
}
snmp6_free_dev(idev);
- kfree(idev);
+ call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
}
static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
if (netif_carrier_ok(dev))
ndev->if_flags |= IF_READY;
- write_lock_bh(&addrconf_lock);
- dev->ip6_ptr = ndev;
- write_unlock_bh(&addrconf_lock);
+ /* protected by rtnl_lock */
+ rcu_assign_pointer(dev->ip6_ptr, ndev);
ipv6_mc_init_dev(ndev);
ndev->tstamp = jiffies;
read_lock(&dev_base_lock);
for (dev=dev_base; dev; dev=dev->next) {
- read_lock(&addrconf_lock);
+ rcu_read_lock();
idev = __in6_dev_get(dev);
if (idev) {
int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
if (changed)
dev_forward_change(idev);
}
- read_unlock(&addrconf_lock);
+ rcu_read_unlock();
}
read_unlock(&dev_base_lock);
}
int hash;
int err = 0;
- read_lock_bh(&addrconf_lock);
+ rcu_read_lock_bh();
if (idev->dead) {
err = -ENODEV; /*XXX*/
goto out2;
in6_ifa_hold(ifa);
write_unlock(&idev->lock);
out2:
- read_unlock_bh(&addrconf_lock);
+ rcu_read_unlock_bh();
if (likely(err == 0))
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
memset(&hiscore, 0, sizeof(hiscore));
read_lock(&dev_base_lock);
- read_lock(&addrconf_lock);
+ rcu_read_lock();
for (dev = dev_base; dev; dev=dev->next) {
struct inet6_dev *idev;
continue;
}
- /* Rule 4: Prefer home address -- not implemented yet */
+ /* Rule 4: Prefer home address */
+#ifdef CONFIG_IPV6_MIP6
+ if (hiscore.rule < 4) {
+ if (ifa_result->flags & IFA_F_HOMEADDRESS)
+ hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
+ hiscore.rule++;
+ }
+ if (ifa->flags & IFA_F_HOMEADDRESS) {
+ score.attrs |= IPV6_SADDR_SCORE_HOA;
+ if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
+ score.rule = 4;
+ goto record_it;
+ }
+ } else {
+ if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
+ continue;
+ }
+#else
if (hiscore.rule < 4)
hiscore.rule++;
+#endif
/* Rule 5: Prefer outgoing interface */
if (hiscore.rule < 5) {
}
read_unlock_bh(&idev->lock);
}
- read_unlock(&addrconf_lock);
+ rcu_read_unlock();
read_unlock(&dev_base_lock);
if (!ifa_result)
struct inet6_dev *idev;
int err = -EADDRNOTAVAIL;
- read_lock(&addrconf_lock);
+ rcu_read_lock();
if ((idev = __in6_dev_get(dev)) != NULL) {
struct inet6_ifaddr *ifp;
}
read_unlock_bh(&idev->lock);
}
- read_unlock(&addrconf_lock);
+ rcu_read_unlock();
return err;
}
struct inet6_dev *idev = (struct inet6_dev *) data;
unsigned long expires;
- read_lock_bh(&addrconf_lock);
+ rcu_read_lock_bh();
write_lock_bh(&idev->lock);
if (idev->dead)
out:
write_unlock_bh(&idev->lock);
- read_unlock_bh(&addrconf_lock);
+ rcu_read_unlock_bh();
in6_dev_put(idev);
}
* Manual configuration of address on an interface
*/
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
- __u32 prefered_lft, __u32 valid_lft)
+ __u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
{
struct inet6_ifaddr *ifp;
struct inet6_dev *idev;
struct net_device *dev;
- __u8 ifa_flags = 0;
int scope;
ASSERT_RTNL();
if ((dev = __dev_get_by_index(ifindex)) == NULL)
return -ENODEV;
- if (!(dev->flags&IFF_UP))
- return -ENETDOWN;
-
if ((idev = addrconf_add_dev(dev)) == NULL)
return -ENOBUFS;
rtnl_lock();
err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
- INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
+ IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
rtnl_unlock();
return err;
}
Do not dev_put!
*/
if (how == 1) {
- write_lock_bh(&addrconf_lock);
- dev->ip6_ptr = NULL;
idev->dead = 1;
- write_unlock_bh(&addrconf_lock);
+
+ /* protected by rtnl_lock */
+ rcu_assign_pointer(dev->ip6_ptr, NULL);
/* Step 1.5: remove snmp6 entry */
snmp6_unregister_dev(idev);
spin_lock_bh(&ifp->lock);
if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
- !(ifp->flags&IFA_F_TENTATIVE)) {
+ !(ifp->flags&IFA_F_TENTATIVE) ||
+ ifp->flags & IFA_F_NODAD) {
ifp->flags &= ~IFA_F_TENTATIVE;
spin_unlock_bh(&ifp->lock);
read_unlock_bh(&idev->lock);
}
#endif /* CONFIG_PROC_FS */
+#ifdef CONFIG_IPV6_MIP6
+/* Check if address is a home address configured on any interface. */
+int ipv6_chk_home_addr(struct in6_addr *addr)
+{
+ int ret = 0;
+ struct inet6_ifaddr * ifp;
+ u8 hash = ipv6_addr_hash(addr);
+ read_lock_bh(&addrconf_hash_lock);
+ for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
+ if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
+ (ifp->flags & IFA_F_HOMEADDRESS)) {
+ ret = 1;
+ break;
+ }
+ }
+ read_unlock_bh(&addrconf_hash_lock);
+ return ret;
+}
+#endif
+
/*
* Periodic address status verification
*/
return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
}
-static int
-inet6_addr_modify(int ifindex, struct in6_addr *pfx,
- __u32 prefered_lft, __u32 valid_lft)
+static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
+ u32 prefered_lft, u32 valid_lft)
{
- struct inet6_ifaddr *ifp = NULL;
- struct net_device *dev;
- int ifa_flags = 0;
-
- if ((dev = __dev_get_by_index(ifindex)) == NULL)
- return -ENODEV;
-
- if (!(dev->flags&IFF_UP))
- return -ENETDOWN;
-
if (!valid_lft || (prefered_lft > valid_lft))
return -EINVAL;
- ifp = ipv6_get_ifaddr(pfx, dev, 1);
- if (ifp == NULL)
- return -ENOENT;
-
if (valid_lft == INFINITY_LIFE_TIME)
- ifa_flags = IFA_F_PERMANENT;
+ ifa_flags |= IFA_F_PERMANENT;
else if (valid_lft >= 0x7FFFFFFF/HZ)
valid_lft = 0x7FFFFFFF/HZ;
if (prefered_lft == 0)
- ifa_flags = IFA_F_DEPRECATED;
+ ifa_flags |= IFA_F_DEPRECATED;
else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
(prefered_lft != INFINITY_LIFE_TIME))
prefered_lft = 0x7FFFFFFF/HZ;
spin_lock_bh(&ifp->lock);
- ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED|IFA_F_PERMANENT)) | ifa_flags;
-
+ ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
ifp->tstamp = jiffies;
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
spin_unlock_bh(&ifp->lock);
if (!(ifp->flags&IFA_F_TENTATIVE))
ipv6_ifa_notify(0, ifp);
- in6_ifa_put(ifp);
addrconf_verify(0);
struct ifaddrmsg *ifm;
struct nlattr *tb[IFA_MAX+1];
struct in6_addr *pfx;
- u32 valid_lft, preferred_lft;
+ struct inet6_ifaddr *ifa;
+ struct net_device *dev;
+ u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
+ u8 ifa_flags;
int err;
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
valid_lft = INFINITY_LIFE_TIME;
}
- if (nlh->nlmsg_flags & NLM_F_REPLACE) {
- err = inet6_addr_modify(ifm->ifa_index, pfx,
- preferred_lft, valid_lft);
- if (err == 0 || !(nlh->nlmsg_flags & NLM_F_CREATE))
- return err;
+ dev = __dev_get_by_index(ifm->ifa_index);
+ if (dev == NULL)
+ return -ENODEV;
+
+ /* We ignore other flags so far. */
+ ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
+
+ ifa = ipv6_get_ifaddr(pfx, dev, 1);
+ if (ifa == NULL) {
+ /*
+ * It would be best to check for !NLM_F_CREATE here but
+ * userspace alreay relies on not having to provide this.
+ */
+ return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
+ ifa_flags, preferred_lft, valid_lft);
}
- return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
- preferred_lft, valid_lft);
+ if (nlh->nlmsg_flags & NLM_F_EXCL ||
+ !(nlh->nlmsg_flags & NLM_F_REPLACE))
+ err = -EEXIST;
+ else
+ err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
+
+ in6_ifa_put(ifa);
+
+ return err;
+}
+
+static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
+ u8 scope, int ifindex)
+{
+ struct ifaddrmsg *ifm;
+
+ ifm = nlmsg_data(nlh);
+ ifm->ifa_family = AF_INET6;
+ ifm->ifa_prefixlen = prefixlen;
+ ifm->ifa_flags = flags;
+ ifm->ifa_scope = scope;
+ ifm->ifa_index = ifindex;
}
static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
}
-/* Maximum length of ifa_cacheinfo attributes */
-#define INET6_IFADDR_RTA_SPACE \
- RTA_SPACE(16) /* IFA_ADDRESS */ + \
- RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */
+static inline int rt_scope(int ifa_scope)
+{
+ if (ifa_scope & IFA_HOST)
+ return RT_SCOPE_HOST;
+ else if (ifa_scope & IFA_LINK)
+ return RT_SCOPE_LINK;
+ else if (ifa_scope & IFA_SITE)
+ return RT_SCOPE_SITE;
+ else
+ return RT_SCOPE_UNIVERSE;
+}
+
+static inline int inet6_ifaddr_msgsize(void)
+{
+ return nlmsg_total_size(sizeof(struct ifaddrmsg) +
+ nla_total_size(16) +
+ nla_total_size(sizeof(struct ifa_cacheinfo)) +
+ 128);
+}
static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
u32 pid, u32 seq, int event, unsigned int flags)
{
- struct ifaddrmsg *ifm;
struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
u32 preferred, valid;
- nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
- ifm = NLMSG_DATA(nlh);
- ifm->ifa_family = AF_INET6;
- ifm->ifa_prefixlen = ifa->prefix_len;
- ifm->ifa_flags = ifa->flags;
- ifm->ifa_scope = RT_SCOPE_UNIVERSE;
- if (ifa->scope&IFA_HOST)
- ifm->ifa_scope = RT_SCOPE_HOST;
- else if (ifa->scope&IFA_LINK)
- ifm->ifa_scope = RT_SCOPE_LINK;
- else if (ifa->scope&IFA_SITE)
- ifm->ifa_scope = RT_SCOPE_SITE;
- ifm->ifa_index = ifa->idev->dev->ifindex;
- RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
+ nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
+ if (nlh == NULL)
+ return -ENOBUFS;
+
+ put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
+ ifa->idev->dev->ifindex);
+
if (!(ifa->flags&IFA_F_PERMANENT)) {
preferred = ifa->prefered_lft;
valid = ifa->valid_lft;
valid = INFINITY_LIFE_TIME;
}
- if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
- goto rtattr_failure;
+ if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
+ put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
+ return nlmsg_cancel(skb, nlh);
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
-
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+ return nlmsg_end(skb, nlh);
}
static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
u32 pid, u32 seq, int event, u16 flags)
{
- struct ifaddrmsg *ifm;
struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
- ifm = NLMSG_DATA(nlh);
- ifm->ifa_family = AF_INET6;
- ifm->ifa_prefixlen = 128;
- ifm->ifa_flags = IFA_F_PERMANENT;
- ifm->ifa_scope = RT_SCOPE_UNIVERSE;
- if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
- ifm->ifa_scope = RT_SCOPE_SITE;
- ifm->ifa_index = ifmca->idev->dev->ifindex;
- RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
-
- if (put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
- INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
- goto rtattr_failure;
+ u8 scope = RT_SCOPE_UNIVERSE;
+ int ifindex = ifmca->idev->dev->ifindex;
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
+ if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
+ scope = RT_SCOPE_SITE;
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+ nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
+ if (nlh == NULL)
+ return -ENOBUFS;
+
+ put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
+ if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
+ put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
+ INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
+ return nlmsg_cancel(skb, nlh);
+
+ return nlmsg_end(skb, nlh);
}
static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
u32 pid, u32 seq, int event, unsigned int flags)
{
- struct ifaddrmsg *ifm;
struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
- ifm = NLMSG_DATA(nlh);
- ifm->ifa_family = AF_INET6;
- ifm->ifa_prefixlen = 128;
- ifm->ifa_flags = IFA_F_PERMANENT;
- ifm->ifa_scope = RT_SCOPE_UNIVERSE;
- if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
- ifm->ifa_scope = RT_SCOPE_SITE;
- ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
- RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
-
- if (put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
- INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
- goto rtattr_failure;
+ u8 scope = RT_SCOPE_UNIVERSE;
+ int ifindex = ifaca->aca_idev->dev->ifindex;
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
+ if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
+ scope = RT_SCOPE_SITE;
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+ nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
+ if (nlh == NULL)
+ return -ENOBUFS;
+
+ put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
+ if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
+ put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
+ INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)
+ return nlmsg_cancel(skb, nlh);
+
+ return nlmsg_end(skb, nlh);
}
enum addr_type_t
struct net_device *dev = NULL;
struct inet6_ifaddr *ifa;
struct sk_buff *skb;
- int payload = sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE;
int err;
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
goto errout;
}
- if ((skb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL)) == NULL) {
+ if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
err = -ENOBUFS;
goto errout_ifa;
}
static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
{
struct sk_buff *skb;
- int payload = sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE;
int err = -ENOBUFS;
- skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC);
+ skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
if (skb == NULL)
goto errout;
array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
#endif
#endif
+ array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
}
/* Maximum length of ifinfomsg attributes */
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
{
- read_lock_bh(&addrconf_lock);
+ rcu_read_lock_bh();
if (likely(ifp->idev->dead == 0))
__ipv6_ifa_notify(event, ifp);
- read_unlock_bh(&addrconf_lock);
+ rcu_read_unlock_bh();
}
#ifdef CONFIG_SYSCTL
},
#endif
#endif
+ {
+ .ctl_name = NET_IPV6_PROXY_NDP,
+ .procname = "proxy_ndp",
+ .data = &ipv6_devconf.proxy_ndp,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
{
.ctl_name = 0, /* sentinel */
}
projects / linux-2.6-microblaze.git / blobdiff