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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c782
1 files changed, 419 insertions, 363 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 055230b669cf..247bd4d8ee45 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -195,6 +195,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
.use_tempaddr = 0,
.temp_valid_lft = TEMP_VALID_LIFETIME,
.temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_min_advance = REGEN_MIN_ADVANCE,
.regen_max_retry = REGEN_MAX_RETRY,
.max_desync_factor = MAX_DESYNC_FACTOR,
.max_addresses = IPV6_MAX_ADDRESSES,
@@ -257,6 +258,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
.use_tempaddr = 0,
.temp_valid_lft = TEMP_VALID_LIFETIME,
.temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_min_advance = REGEN_MIN_ADVANCE,
.regen_max_retry = REGEN_MAX_RETRY,
.max_desync_factor = MAX_DESYNC_FACTOR,
.max_addresses = IPV6_MAX_ADDRESSES,
@@ -549,7 +551,8 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
goto out;
if ((all || type == NETCONFA_FORWARDING) &&
- nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
+ nla_put_s32(skb, NETCONFA_FORWARDING,
+ READ_ONCE(devconf->forwarding)) < 0)
goto nla_put_failure;
#ifdef CONFIG_IPV6_MROUTE
if ((all || type == NETCONFA_MC_FORWARDING) &&
@@ -558,12 +561,13 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
goto nla_put_failure;
#endif
if ((all || type == NETCONFA_PROXY_NEIGH) &&
- nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0)
+ nla_put_s32(skb, NETCONFA_PROXY_NEIGH,
+ READ_ONCE(devconf->proxy_ndp)) < 0)
goto nla_put_failure;
if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
- devconf->ignore_routes_with_linkdown) < 0)
+ READ_ONCE(devconf->ignore_routes_with_linkdown)) < 0)
goto nla_put_failure;
out:
@@ -713,7 +717,7 @@ errout:
static u32 inet6_base_seq(const struct net *net)
{
u32 res = atomic_read(&net->ipv6.dev_addr_genid) +
- net->dev_base_seq;
+ READ_ONCE(net->dev_base_seq);
/* Must not return 0 (see nl_dump_check_consistent()).
* Chose a value far away from 0.
@@ -723,17 +727,18 @@ static u32 inet6_base_seq(const struct net *net)
return res;
}
-
static int inet6_netconf_dump_devconf(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct nlmsghdr *nlh = cb->nlh;
struct net *net = sock_net(skb->sk);
- int h, s_h;
- int idx, s_idx;
+ struct {
+ unsigned long ifindex;
+ unsigned int all_default;
+ } *ctx = (void *)cb->ctx;
struct net_device *dev;
struct inet6_dev *idev;
- struct hlist_head *head;
+ int err = 0;
if (cb->strict_check) {
struct netlink_ext_ack *extack = cb->extack;
@@ -750,64 +755,46 @@ static int inet6_netconf_dump_devconf(struct sk_buff *skb,
}
}
- s_h = cb->args[0];
- s_idx = idx = cb->args[1];
-
- for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
- idx = 0;
- head = &net->dev_index_head[h];
- rcu_read_lock();
- cb->seq = inet6_base_seq(net);
- hlist_for_each_entry_rcu(dev, head, index_hlist) {
- if (idx < s_idx)
- goto cont;
- idev = __in6_dev_get(dev);
- if (!idev)
- goto cont;
-
- if (inet6_netconf_fill_devconf(skb, dev->ifindex,
- &idev->cnf,
- NETLINK_CB(cb->skb).portid,
- nlh->nlmsg_seq,
- RTM_NEWNETCONF,
- NLM_F_MULTI,
- NETCONFA_ALL) < 0) {
- rcu_read_unlock();
- goto done;
- }
- nl_dump_check_consistent(cb, nlmsg_hdr(skb));
-cont:
- idx++;
- }
- rcu_read_unlock();
+ rcu_read_lock();
+ for_each_netdev_dump(net, dev, ctx->ifindex) {
+ idev = __in6_dev_get(dev);
+ if (!idev)
+ continue;
+ err = inet6_netconf_fill_devconf(skb, dev->ifindex,
+ &idev->cnf,
+ NETLINK_CB(cb->skb).portid,
+ nlh->nlmsg_seq,
+ RTM_NEWNETCONF,
+ NLM_F_MULTI,
+ NETCONFA_ALL);
+ if (err < 0)
+ goto done;
}
- if (h == NETDEV_HASHENTRIES) {
- if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
- net->ipv6.devconf_all,
- NETLINK_CB(cb->skb).portid,
- nlh->nlmsg_seq,
- RTM_NEWNETCONF, NLM_F_MULTI,
- NETCONFA_ALL) < 0)
+ if (ctx->all_default == 0) {
+ err = inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
+ net->ipv6.devconf_all,
+ NETLINK_CB(cb->skb).portid,
+ nlh->nlmsg_seq,
+ RTM_NEWNETCONF, NLM_F_MULTI,
+ NETCONFA_ALL);
+ if (err < 0)
goto done;
- else
- h++;
- }
- if (h == NETDEV_HASHENTRIES + 1) {
- if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
- net->ipv6.devconf_dflt,
- NETLINK_CB(cb->skb).portid,
- nlh->nlmsg_seq,
- RTM_NEWNETCONF, NLM_F_MULTI,
- NETCONFA_ALL) < 0)
+ ctx->all_default++;
+ }
+ if (ctx->all_default == 1) {
+ err = inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
+ net->ipv6.devconf_dflt,
+ NETLINK_CB(cb->skb).portid,
+ nlh->nlmsg_seq,
+ RTM_NEWNETCONF, NLM_F_MULTI,
+ NETCONFA_ALL);
+ if (err < 0)
goto done;
- else
- h++;
+ ctx->all_default++;
}
done:
- cb->args[0] = h;
- cb->args[1] = idx;
-
- return skb->len;
+ rcu_read_unlock();
+ return err;
}
#ifdef CONFIG_SYSCTL
@@ -867,7 +854,8 @@ static void addrconf_forward_change(struct net *net, __s32 newf)
idev = __in6_dev_get(dev);
if (idev) {
int changed = (!idev->cnf.forwarding) ^ (!newf);
- idev->cnf.forwarding = newf;
+
+ WRITE_ONCE(idev->cnf.forwarding, newf);
if (changed)
dev_forward_change(idev);
}
@@ -884,7 +872,7 @@ static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
net = (struct net *)table->extra2;
old = *p;
- *p = newf;
+ WRITE_ONCE(*p, newf);
if (p == &net->ipv6.devconf_dflt->forwarding) {
if ((!newf) ^ (!old))
@@ -899,7 +887,7 @@ static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
if (p == &net->ipv6.devconf_all->forwarding) {
int old_dflt = net->ipv6.devconf_dflt->forwarding;
- net->ipv6.devconf_dflt->forwarding = newf;
+ WRITE_ONCE(net->ipv6.devconf_dflt->forwarding, newf);
if ((!newf) ^ (!old_dflt))
inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
NETCONFA_FORWARDING,
@@ -931,7 +919,7 @@ static void addrconf_linkdown_change(struct net *net, __s32 newf)
if (idev) {
int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);
- idev->cnf.ignore_routes_with_linkdown = newf;
+ WRITE_ONCE(idev->cnf.ignore_routes_with_linkdown, newf);
if (changed)
inet6_netconf_notify_devconf(dev_net(dev),
RTM_NEWNETCONF,
@@ -952,7 +940,7 @@ static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
net = (struct net *)table->extra2;
old = *p;
- *p = newf;
+ WRITE_ONCE(*p, newf);
if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) {
if ((!newf) ^ (!old))
@@ -966,7 +954,7 @@ static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf)
}
if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) {
- net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf;
+ WRITE_ONCE(net->ipv6.devconf_dflt->ignore_routes_with_linkdown, newf);
addrconf_linkdown_change(net, newf);
if ((!newf) ^ (!old))
inet6_netconf_notify_devconf(net,
@@ -1270,6 +1258,7 @@ static void
cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires,
bool del_rt, bool del_peer)
{
+ struct fib6_table *table;
struct fib6_info *f6i;
f6i = addrconf_get_prefix_route(del_peer ? &ifp->peer_addr : &ifp->addr,
@@ -1279,8 +1268,15 @@ cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires,
if (del_rt)
ip6_del_rt(dev_net(ifp->idev->dev), f6i, false);
else {
- if (!(f6i->fib6_flags & RTF_EXPIRES))
+ if (!(f6i->fib6_flags & RTF_EXPIRES)) {
+ table = f6i->fib6_table;
+ spin_lock_bh(&table->tb6_lock);
+
fib6_set_expires(f6i, expires);
+ fib6_add_gc_list(f6i);
+
+ spin_unlock_bh(&table->tb6_lock);
+ }
fib6_info_release(f6i);
}
}
@@ -1346,12 +1342,21 @@ out:
in6_ifa_put(ifp);
}
+static unsigned long ipv6_get_regen_advance(const struct inet6_dev *idev)
+{
+ return READ_ONCE(idev->cnf.regen_min_advance) +
+ READ_ONCE(idev->cnf.regen_max_retry) *
+ READ_ONCE(idev->cnf.dad_transmits) *
+ max(NEIGH_VAR(idev->nd_parms, RETRANS_TIME), HZ/100) / HZ;
+}
+
static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, bool block)
{
struct inet6_dev *idev = ifp->idev;
unsigned long tmp_tstamp, age;
unsigned long regen_advance;
unsigned long now = jiffies;
+ u32 if_public_preferred_lft;
s32 cnf_temp_preferred_lft;
struct inet6_ifaddr *ift;
struct ifa6_config cfg;
@@ -1363,7 +1368,7 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, bool block)
retry:
in6_dev_hold(idev);
- if (idev->cnf.use_tempaddr <= 0) {
+ if (READ_ONCE(idev->cnf.use_tempaddr) <= 0) {
write_unlock_bh(&idev->lock);
pr_info("%s: use_tempaddr is disabled\n", __func__);
in6_dev_put(idev);
@@ -1371,8 +1376,8 @@ retry:
goto out;
}
spin_lock_bh(&ifp->lock);
- if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
- idev->cnf.use_tempaddr = -1; /*XXX*/
+ if (ifp->regen_count++ >= READ_ONCE(idev->cnf.regen_max_retry)) {
+ WRITE_ONCE(idev->cnf.use_tempaddr, -1); /*XXX*/
spin_unlock_bh(&ifp->lock);
write_unlock_bh(&idev->lock);
pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
@@ -1387,16 +1392,14 @@ retry:
age = (now - ifp->tstamp) / HZ;
- regen_advance = idev->cnf.regen_max_retry *
- idev->cnf.dad_transmits *
- max(NEIGH_VAR(idev->nd_parms, RETRANS_TIME), HZ/100) / HZ;
+ regen_advance = ipv6_get_regen_advance(idev);
/* recalculate max_desync_factor each time and update
* idev->desync_factor if it's larger
*/
cnf_temp_preferred_lft = READ_ONCE(idev->cnf.temp_prefered_lft);
max_desync_factor = min_t(long,
- idev->cnf.max_desync_factor,
+ READ_ONCE(idev->cnf.max_desync_factor),
cnf_temp_preferred_lft - regen_advance);
if (unlikely(idev->desync_factor > max_desync_factor)) {
@@ -1409,11 +1412,13 @@ retry:
}
}
+ if_public_preferred_lft = ifp->prefered_lft;
+
memset(&cfg, 0, sizeof(cfg));
cfg.valid_lft = min_t(__u32, ifp->valid_lft,
- idev->cnf.temp_valid_lft + age);
+ READ_ONCE(idev->cnf.temp_valid_lft) + age);
cfg.preferred_lft = cnf_temp_preferred_lft + age - idev->desync_factor;
- cfg.preferred_lft = min_t(__u32, ifp->prefered_lft, cfg.preferred_lft);
+ cfg.preferred_lft = min_t(__u32, if_public_preferred_lft, cfg.preferred_lft);
cfg.preferred_lft = min_t(__u32, cfg.valid_lft, cfg.preferred_lft);
cfg.plen = ifp->prefix_len;
@@ -1422,19 +1427,41 @@ retry:
write_unlock_bh(&idev->lock);
- /* A temporary address is created only if this calculated Preferred
- * Lifetime is greater than REGEN_ADVANCE time units. In particular,
- * an implementation must not create a temporary address with a zero
- * Preferred Lifetime.
+ /* From RFC 4941:
+ *
+ * A temporary address is created only if this calculated Preferred
+ * Lifetime is greater than REGEN_ADVANCE time units. In
+ * particular, an implementation must not create a temporary address
+ * with a zero Preferred Lifetime.
+ *
+ * ...
+ *
+ * When creating a temporary address, the lifetime values MUST be
+ * derived from the corresponding prefix as follows:
+ *
+ * ...
+ *
+ * * Its Preferred Lifetime is the lower of the Preferred Lifetime
+ * of the public address or TEMP_PREFERRED_LIFETIME -
+ * DESYNC_FACTOR.
+ *
+ * To comply with the RFC's requirements, clamp the preferred lifetime
+ * to a minimum of regen_advance, unless that would exceed valid_lft or
+ * ifp->prefered_lft.
+ *
* Use age calculation as in addrconf_verify to avoid unnecessary
* temporary addresses being generated.
*/
age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
if (cfg.preferred_lft <= regen_advance + age) {
- in6_ifa_put(ifp);
- in6_dev_put(idev);
- ret = -1;
- goto out;
+ cfg.preferred_lft = regen_advance + age + 1;
+ if (cfg.preferred_lft > cfg.valid_lft ||
+ cfg.preferred_lft > if_public_preferred_lft) {
+ in6_ifa_put(ifp);
+ in6_dev_put(idev);
+ ret = -1;
+ goto out;
+ }
}
cfg.ifa_flags = IFA_F_TEMPORARY;
@@ -1513,15 +1540,17 @@ static inline int ipv6_saddr_preferred(int type)
return 0;
}
-static bool ipv6_use_optimistic_addr(struct net *net,
- struct inet6_dev *idev)
+static bool ipv6_use_optimistic_addr(const struct net *net,
+ const struct inet6_dev *idev)
{
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
if (!idev)
return false;
- if (!net->ipv6.devconf_all->optimistic_dad && !idev->cnf.optimistic_dad)
+ if (!READ_ONCE(net->ipv6.devconf_all->optimistic_dad) &&
+ !READ_ONCE(idev->cnf.optimistic_dad))
return false;
- if (!net->ipv6.devconf_all->use_optimistic && !idev->cnf.use_optimistic)
+ if (!READ_ONCE(net->ipv6.devconf_all->use_optimistic) &&
+ !READ_ONCE(idev->cnf.use_optimistic))
return false;
return true;
@@ -1530,13 +1559,14 @@ static bool ipv6_use_optimistic_addr(struct net *net,
#endif
}
-static bool ipv6_allow_optimistic_dad(struct net *net,
- struct inet6_dev *idev)
+static bool ipv6_allow_optimistic_dad(const struct net *net,
+ const struct inet6_dev *idev)
{
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
if (!idev)
return false;
- if (!net->ipv6.devconf_all->optimistic_dad && !idev->cnf.optimistic_dad)
+ if (!READ_ONCE(net->ipv6.devconf_all->optimistic_dad) &&
+ !READ_ONCE(idev->cnf.optimistic_dad))
return false;
return true;
@@ -1642,7 +1672,7 @@ static int ipv6_get_saddr_eval(struct net *net,
*/
int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
!!(dst->prefs & IPV6_PREFER_SRC_TMP) :
- score->ifa->idev->cnf.use_tempaddr >= 2;
+ READ_ONCE(score->ifa->idev->cnf.use_tempaddr) >= 2;
ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
break;
}
@@ -1818,7 +1848,7 @@ int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
idev = __in6_dev_get(dst_dev);
if ((dst_type & IPV6_ADDR_MULTICAST) ||
dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL ||
- (idev && idev->cnf.use_oif_addrs_only)) {
+ (idev && READ_ONCE(idev->cnf.use_oif_addrs_only))) {
use_oif_addr = true;
}
}
@@ -2125,6 +2155,7 @@ void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp)
{
struct inet6_dev *idev = ifp->idev;
struct net *net = dev_net(idev->dev);
+ int max_addresses;
if (addrconf_dad_end(ifp)) {
in6_ifa_put(ifp);
@@ -2162,9 +2193,9 @@ void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp)
spin_unlock_bh(&ifp->lock);
- if (idev->cnf.max_addresses &&
- ipv6_count_addresses(idev) >=
- idev->cnf.max_addresses)
+ max_addresses = READ_ONCE(idev->cnf.max_addresses);
+ if (max_addresses &&
+ ipv6_count_addresses(idev) >= max_addresses)
goto lock_errdad;
net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n",
@@ -2561,11 +2592,11 @@ static void manage_tempaddrs(struct inet6_dev *idev,
* (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
*/
age = (now - ift->cstamp) / HZ;
- max_valid = idev->cnf.temp_valid_lft - age;
+ max_valid = READ_ONCE(idev->cnf.temp_valid_lft) - age;
if (max_valid < 0)
max_valid = 0;
- max_prefered = idev->cnf.temp_prefered_lft -
+ max_prefered = READ_ONCE(idev->cnf.temp_prefered_lft) -
idev->desync_factor - age;
if (max_prefered < 0)
max_prefered = 0;
@@ -2598,7 +2629,7 @@ static void manage_tempaddrs(struct inet6_dev *idev,
if (list_empty(&idev->tempaddr_list) && (valid_lft || prefered_lft))
create = true;
- if (create && idev->cnf.use_tempaddr > 0) {
+ if (create && READ_ONCE(idev->cnf.use_tempaddr) > 0) {
/* When a new public address is created as described
* in [ADDRCONF], also create a new temporary address.
*/
@@ -2626,7 +2657,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
int create = 0, update_lft = 0;
if (!ifp && valid_lft) {
- int max_addresses = in6_dev->cnf.max_addresses;
+ int max_addresses = READ_ONCE(in6_dev->cnf.max_addresses);
struct ifa6_config cfg = {
.pfx = addr,
.plen = pinfo->prefix_len,
@@ -2638,8 +2669,8 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
};
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
- if ((net->ipv6.devconf_all->optimistic_dad ||
- in6_dev->cnf.optimistic_dad) &&
+ if ((READ_ONCE(net->ipv6.devconf_all->optimistic_dad) ||
+ READ_ONCE(in6_dev->cnf.optimistic_dad)) &&
!net->ipv6.devconf_all->forwarding && sllao)
cfg.ifa_flags |= IFA_F_OPTIMISTIC;
#endif
@@ -2688,7 +2719,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
*/
update_lft = !create && stored_lft;
- if (update_lft && !in6_dev->cnf.ra_honor_pio_life) {
+ if (update_lft && !READ_ONCE(in6_dev->cnf.ra_honor_pio_life)) {
const u32 minimum_lft = min_t(u32,
stored_lft, MIN_VALID_LIFETIME);
valid_lft = max(valid_lft, minimum_lft);
@@ -2697,7 +2728,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
if (update_lft) {
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
- ifp->tstamp = now;
+ WRITE_ONCE(ifp->tstamp, now);
flags = ifp->flags;
ifp->flags &= ~IFA_F_DEPRECATED;
spin_unlock_bh(&ifp->lock);
@@ -2721,6 +2752,7 @@ EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr);
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
{
struct prefix_info *pinfo;
+ struct fib6_table *table;
__u32 valid_lft;
__u32 prefered_lft;
int addr_type, err;
@@ -2797,11 +2829,20 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
if (valid_lft == 0) {
ip6_del_rt(net, rt, false);
rt = NULL;
- } else if (addrconf_finite_timeout(rt_expires)) {
- /* not infinity */
- fib6_set_expires(rt, jiffies + rt_expires);
} else {
- fib6_clean_expires(rt);
+ table = rt->fib6_table;
+ spin_lock_bh(&table->tb6_lock);
+
+ if (addrconf_finite_timeout(rt_expires)) {
+ /* not infinity */
+ fib6_set_expires(rt, jiffies + rt_expires);
+ fib6_add_gc_list(rt);
+ } else {
+ fib6_clean_expires(rt);
+ fib6_remove_gc_list(rt);
+ }
+
+ spin_unlock_bh(&table->tb6_lock);
}
} else if (valid_lft) {
clock_t expires = 0;
@@ -3262,8 +3303,8 @@ void addrconf_add_linklocal(struct inet6_dev *idev,
struct inet6_ifaddr *ifp;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
- if ((dev_net(idev->dev)->ipv6.devconf_all->optimistic_dad ||
- idev->cnf.optimistic_dad) &&
+ if ((READ_ONCE(dev_net(idev->dev)->ipv6.devconf_all->optimistic_dad) ||
+ READ_ONCE(idev->cnf.optimistic_dad)) &&
!dev_net(idev->dev)->ipv6.devconf_all->forwarding)
cfg.ifa_flags |= IFA_F_OPTIMISTIC;
#endif
@@ -3442,7 +3483,8 @@ static void addrconf_dev_config(struct net_device *dev)
/* this device type has no EUI support */
if (dev->type == ARPHRD_NONE &&
idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64)
- idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM;
+ WRITE_ONCE(idev->cnf.addr_gen_mode,
+ IN6_ADDR_GEN_MODE_RANDOM);
addrconf_addr_gen(idev, false);
}
@@ -3620,7 +3662,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
if (idev) {
rt6_mtu_change(dev, dev->mtu);
- idev->cnf.mtu6 = dev->mtu;
+ WRITE_ONCE(idev->cnf.mtu6, dev->mtu);
break;
}
@@ -3712,9 +3754,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
if (idev->cnf.mtu6 != dev->mtu &&
dev->mtu >= IPV6_MIN_MTU) {
rt6_mtu_change(dev, dev->mtu);
- idev->cnf.mtu6 = dev->mtu;
+ WRITE_ONCE(idev->cnf.mtu6, dev->mtu);
}
- idev->tstamp = jiffies;
+ WRITE_ONCE(idev->tstamp, jiffies);
inet6_ifinfo_notify(RTM_NEWLINK, idev);
/*
@@ -3834,10 +3876,10 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
*/
if (!unregister && !idev->cnf.disable_ipv6) {
/* aggregate the system setting and interface setting */
- int _keep_addr = net->ipv6.devconf_all->keep_addr_on_down;
+ int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);
if (!_keep_addr)
- _keep_addr = idev->cnf.keep_addr_on_down;
+ _keep_addr = READ_ONCE(idev->cnf.keep_addr_on_down);
keep_addr = (_keep_addr > 0);
}
@@ -3956,7 +3998,7 @@ restart:
ipv6_mc_down(idev);
}
- idev->tstamp = jiffies;
+ WRITE_ONCE(idev->tstamp, jiffies);
idev->ra_mtu = 0;
/* Last: Shot the device (if unregistered) */
@@ -3974,6 +4016,7 @@ static void addrconf_rs_timer(struct timer_list *t)
struct inet6_dev *idev = from_timer(idev, t, rs_timer);
struct net_device *dev = idev->dev;
struct in6_addr lladdr;
+ int rtr_solicits;
write_lock(&idev->lock);
if (idev->dead || !(idev->if_flags & IF_READY))
@@ -3986,7 +4029,9 @@ static void addrconf_rs_timer(struct timer_list *t)
if (idev->if_flags & IF_RA_RCVD)
goto out;
- if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) {
+ rtr_solicits = READ_ONCE(idev->cnf.rtr_solicits);
+
+ if (idev->rs_probes++ < rtr_solicits || rtr_solicits < 0) {
write_unlock(&idev->lock);
if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
ndisc_send_rs(dev, &lladdr,
@@ -3996,11 +4041,12 @@ static void addrconf_rs_timer(struct timer_list *t)
write_lock(&idev->lock);
idev->rs_interval = rfc3315_s14_backoff_update(
- idev->rs_interval, idev->cnf.rtr_solicit_max_interval);
+ idev->rs_interval,
+ READ_ONCE(idev->cnf.rtr_solicit_max_interval));
/* The wait after the last probe can be shorter */
addrconf_mod_rs_timer(idev, (idev->rs_probes ==
- idev->cnf.rtr_solicits) ?
- idev->cnf.rtr_solicit_delay :
+ READ_ONCE(idev->cnf.rtr_solicits)) ?
+ READ_ONCE(idev->cnf.rtr_solicit_delay) :
idev->rs_interval);
} else {
/*
@@ -4021,24 +4067,25 @@ put:
*/
static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
{
- unsigned long rand_num;
struct inet6_dev *idev = ifp->idev;
+ unsigned long rand_num;
u64 nonce;
if (ifp->flags & IFA_F_OPTIMISTIC)
rand_num = 0;
else
- rand_num = get_random_u32_below(idev->cnf.rtr_solicit_delay ? : 1);
+ rand_num = get_random_u32_below(
+ READ_ONCE(idev->cnf.rtr_solicit_delay) ? : 1);
nonce = 0;
- if (idev->cnf.enhanced_dad ||
- dev_net(idev->dev)->ipv6.devconf_all->enhanced_dad) {
+ if (READ_ONCE(idev->cnf.enhanced_dad) ||
+ READ_ONCE(dev_net(idev->dev)->ipv6.devconf_all->enhanced_dad)) {
do
get_random_bytes(&nonce, 6);
while (nonce == 0);
}
ifp->dad_nonce = nonce;
- ifp->dad_probes = idev->cnf.dad_transmits;
+ ifp->dad_probes = READ_ONCE(idev->cnf.dad_transmits);
addrconf_mod_dad_work(ifp, rand_num);
}
@@ -4058,8 +4105,8 @@ static void addrconf_dad_begin(struct inet6_ifaddr *ifp)
net = dev_net(dev);
if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
- (net->ipv6.devconf_all->accept_dad < 1 &&
- idev->cnf.accept_dad < 1) ||
+ (READ_ONCE(net->ipv6.devconf_all->accept_dad) < 1 &&
+ READ_ONCE(idev->cnf.accept_dad) < 1) ||
!(ifp->flags&IFA_F_TENTATIVE) ||
ifp->flags & IFA_F_NODAD) {
bool send_na = false;
@@ -4151,8 +4198,8 @@ static void addrconf_dad_work(struct work_struct *w)
action = DAD_ABORT;
ifp->state = INET6_IFADDR_STATE_POSTDAD;
- if ((dev_net(idev->dev)->ipv6.devconf_all->accept_dad > 1 ||
- idev->cnf.accept_dad > 1) &&
+ if ((READ_ONCE(dev_net(idev->dev)->ipv6.devconf_all->accept_dad) > 1 ||
+ READ_ONCE(idev->cnf.accept_dad) > 1) &&
!idev->cnf.disable_ipv6 &&
!(ifp->flags & IFA_F_STABLE_PRIVACY)) {
struct in6_addr addr;
@@ -4163,7 +4210,7 @@ static void addrconf_dad_work(struct work_struct *w)
if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
ipv6_addr_equal(&ifp->addr, &addr)) {
/* DAD failed for link-local based on MAC */
- idev->cnf.disable_ipv6 = 1;
+ WRITE_ONCE(idev->cnf.disable_ipv6, 1);
pr_info("%s: IPv6 being disabled!\n",
ifp->idev->dev->name);
@@ -4277,7 +4324,7 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp);
send_rs = send_mld &&
ipv6_accept_ra(ifp->idev) &&
- ifp->idev->cnf.rtr_solicits != 0 &&
+ READ_ONCE(ifp->idev->cnf.rtr_solicits) != 0 &&
(dev->flags & IFF_LOOPBACK) == 0 &&
(dev->type != ARPHRD_TUNNEL) &&
!netif_is_team_port(dev);
@@ -4291,8 +4338,8 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
/* send unsolicited NA if enabled */
if (send_na &&
- (ifp->idev->cnf.ndisc_notify ||
- dev_net(dev)->ipv6.devconf_all->ndisc_notify)) {
+ (READ_ONCE(ifp->idev->cnf.ndisc_notify) ||
+ READ_ONCE(dev_net(dev)->ipv6.devconf_all->ndisc_notify))) {
ndisc_send_na(dev, &in6addr_linklocal_allnodes, &ifp->addr,
/*router=*/ !!ifp->idev->cnf.forwarding,
/*solicited=*/ false, /*override=*/ true,
@@ -4312,7 +4359,7 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
write_lock_bh(&ifp->idev->lock);
spin_lock(&ifp->lock);
ifp->idev->rs_interval = rfc3315_s14_backoff_init(
- ifp->idev->cnf.rtr_solicit_interval);
+ READ_ONCE(ifp->idev->cnf.rtr_solicit_interval));
ifp->idev->rs_probes = 1;
ifp->idev->if_flags |= IF_RS_SENT;
addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval);
@@ -4592,9 +4639,7 @@ restart:
!ifp->regen_count && ifp->ifpub) {
/* This is a non-regenerated temporary addr. */
- unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
- ifp->idev->cnf.dad_transmits *
- max(NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME), HZ/100) / HZ;
+ unsigned long regen_advance = ipv6_get_regen_advance(ifp->idev);
if (age + regen_advance >= ifp->prefered_lft) {
struct inet6_ifaddr *ifpub = ifp->ifpub;
@@ -4756,6 +4801,7 @@ static int modify_prefix_route(struct inet6_ifaddr *ifp,
unsigned long expires, u32 flags,
bool modify_peer)
{
+ struct fib6_table *table;
struct fib6_info *f6i;
u32 prio;
@@ -4776,10 +4822,18 @@ static int modify_prefix_route(struct inet6_ifaddr *ifp,
ifp->rt_priority, ifp->idev->dev,
expires, flags, GFP_KERNEL);
} else {
- if (!expires)
+ table = f6i->fib6_table;
+ spin_lock_bh(&table->tb6_lock);
+
+ if (!(flags & RTF_EXPIRES)) {
fib6_clean_expires(f6i);
- else
+ fib6_remove_gc_list(f6i);
+ } else {
fib6_set_expires(f6i, expires);
+ fib6_add_gc_list(f6i);
+ }
+
+ spin_unlock_bh(&table->tb6_lock);
fib6_info_release(f6i);
}
@@ -4842,13 +4896,13 @@ static int inet6_addr_modify(struct net *net, struct inet6_ifaddr *ifp,
IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
IFA_F_NOPREFIXROUTE);
ifp->flags |= cfg->ifa_flags;
- ifp->tstamp = jiffies;
- ifp->valid_lft = cfg->valid_lft;
- ifp->prefered_lft = cfg->preferred_lft;
- ifp->ifa_proto = cfg->ifa_proto;
+ WRITE_ONCE(ifp->tstamp, jiffies);
+ WRITE_ONCE(ifp->valid_lft, cfg->valid_lft);
+ WRITE_ONCE(ifp->prefered_lft, cfg->preferred_lft);
+ WRITE_ONCE(ifp->ifa_proto, cfg->ifa_proto);
if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority)
- ifp->rt_priority = cfg->rt_priority;
+ WRITE_ONCE(ifp->rt_priority, cfg->rt_priority);
if (new_peer)
ifp->peer_addr = *cfg->peer_pfx;
@@ -5069,17 +5123,21 @@ struct inet6_fill_args {
enum addr_type_t type;
};
-static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
+static int inet6_fill_ifaddr(struct sk_buff *skb,
+ const struct inet6_ifaddr *ifa,
struct inet6_fill_args *args)
{
- struct nlmsghdr *nlh;
+ struct nlmsghdr *nlh;
u32 preferred, valid;
+ u32 flags, priority;
+ u8 proto;
nlh = nlmsg_put(skb, args->portid, args->seq, args->event,
sizeof(struct ifaddrmsg), args->flags);
if (!nlh)
return -EMSGSIZE;
+ flags = READ_ONCE(ifa->flags);
put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
ifa->idev->dev->ifindex);
@@ -5087,13 +5145,14 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid))
goto error;
- spin_lock_bh(&ifa->lock);
- if (!((ifa->flags&IFA_F_PERMANENT) &&
- (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
- preferred = ifa->prefered_lft;
- valid = ifa->valid_lft;
+ preferred = READ_ONCE(ifa->prefered_lft);
+ valid = READ_ONCE(ifa->valid_lft);
+
+ if (!((flags & IFA_F_PERMANENT) &&
+ (preferred == INFINITY_LIFE_TIME))) {
if (preferred != INFINITY_LIFE_TIME) {
- long tval = (jiffies - ifa->tstamp)/HZ;
+ long tval = (jiffies - READ_ONCE(ifa->tstamp)) / HZ;
+
if (preferred > tval)
preferred -= tval;
else
@@ -5109,28 +5168,29 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
preferred = INFINITY_LIFE_TIME;
valid = INFINITY_LIFE_TIME;
}
- spin_unlock_bh(&ifa->lock);
if (!ipv6_addr_any(&ifa->peer_addr)) {
if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 ||
nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0)
goto error;
- } else
+ } else {
if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0)
goto error;
+ }
- if (ifa->rt_priority &&
- nla_put_u32(skb, IFA_RT_PRIORITY, ifa->rt_priority))
+ priority = READ_ONCE(ifa->rt_priority);
+ if (priority && nla_put_u32(skb, IFA_RT_PRIORITY, priority))
goto error;
- if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
+ if (put_cacheinfo(skb, ifa->cstamp, READ_ONCE(ifa->tstamp),
+ preferred, valid) < 0)
goto error;
- if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0)
+ if (nla_put_u32(skb, IFA_FLAGS, flags) < 0)
goto error;
- if (ifa->ifa_proto &&
- nla_put_u8(skb, IFA_PROTO, ifa->ifa_proto))
+ proto = READ_ONCE(ifa->ifa_proto);
+ if (proto && nla_put_u8(skb, IFA_PROTO, proto))
goto error;
nlmsg_end(skb, nlh);
@@ -5141,12 +5201,13 @@ error:
return -EMSGSIZE;
}
-static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
+static int inet6_fill_ifmcaddr(struct sk_buff *skb,
+ const struct ifmcaddr6 *ifmca,
struct inet6_fill_args *args)
{
- struct nlmsghdr *nlh;
- u8 scope = RT_SCOPE_UNIVERSE;
int ifindex = ifmca->idev->dev->ifindex;
+ u8 scope = RT_SCOPE_UNIVERSE;
+ struct nlmsghdr *nlh;
if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
scope = RT_SCOPE_SITE;
@@ -5164,7 +5225,7 @@ static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 ||
- put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
+ put_cacheinfo(skb, ifmca->mca_cstamp, READ_ONCE(ifmca->mca_tstamp),
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
@@ -5174,13 +5235,14 @@ static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
return 0;
}
-static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
+static int inet6_fill_ifacaddr(struct sk_buff *skb,
+ const struct ifacaddr6 *ifaca,
struct inet6_fill_args *args)
{
struct net_device *dev = fib6_info_nh_dev(ifaca->aca_rt);
int ifindex = dev ? dev->ifindex : 1;
- struct nlmsghdr *nlh;
u8 scope = RT_SCOPE_UNIVERSE;
+ struct nlmsghdr *nlh;
if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
scope = RT_SCOPE_SITE;
@@ -5198,7 +5260,7 @@ static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 ||
- put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
+ put_cacheinfo(skb, ifaca->aca_cstamp, READ_ONCE(ifaca->aca_tstamp),
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
@@ -5209,24 +5271,23 @@ static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
}
/* called with rcu_read_lock() */
-static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
- struct netlink_callback *cb, int s_ip_idx,
+static int in6_dump_addrs(const struct inet6_dev *idev, struct sk_buff *skb,
+ struct netlink_callback *cb, int *s_ip_idx,
struct inet6_fill_args *fillargs)
{
- struct ifmcaddr6 *ifmca;
- struct ifacaddr6 *ifaca;
+ const struct ifmcaddr6 *ifmca;
+ const struct ifacaddr6 *ifaca;
int ip_idx = 0;
- int err = 1;
+ int err = 0;
- read_lock_bh(&idev->lock);
switch (fillargs->type) {
case UNICAST_ADDR: {
- struct inet6_ifaddr *ifa;
+ const struct inet6_ifaddr *ifa;
fillargs->event = RTM_NEWADDR;
/* unicast address incl. temp addr */
- list_for_each_entry(ifa, &idev->addr_list, if_list) {
- if (ip_idx < s_ip_idx)
+ list_for_each_entry_rcu(ifa, &idev->addr_list, if_list) {
+ if (ip_idx < *s_ip_idx)
goto next;
err = inet6_fill_ifaddr(skb, ifa, fillargs);
if (err < 0)
@@ -5238,27 +5299,25 @@ next:
break;
}
case MULTICAST_ADDR:
- read_unlock_bh(&idev->lock);
fillargs->event = RTM_GETMULTICAST;
/* multicast address */
- for (ifmca = rtnl_dereference(idev->mc_list);
+ for (ifmca = rcu_dereference(idev->mc_list);
ifmca;
- ifmca = rtnl_dereference(ifmca->next), ip_idx++) {
- if (ip_idx < s_ip_idx)
+ ifmca = rcu_dereference(ifmca->next), ip_idx++) {
+ if (ip_idx < *s_ip_idx)
continue;
err = inet6_fill_ifmcaddr(skb, ifmca, fillargs);
if (err < 0)
break;
}
- read_lock_bh(&idev->lock);
break;
case ANYCAST_ADDR:
fillargs->event = RTM_GETANYCAST;
/* anycast address */
- for (ifaca = idev->ac_list; ifaca;
- ifaca = ifaca->aca_next, ip_idx++) {
- if (ip_idx < s_ip_idx)
+ for (ifaca = rcu_dereference(idev->ac_list); ifaca;
+ ifaca = rcu_dereference(ifaca->aca_next), ip_idx++) {
+ if (ip_idx < *s_ip_idx)
continue;
err = inet6_fill_ifacaddr(skb, ifaca, fillargs);
if (err < 0)
@@ -5268,8 +5327,7 @@ next:
default:
break;
}
- read_unlock_bh(&idev->lock);
- cb->args[2] = ip_idx;
+ *s_ip_idx = err ? ip_idx : 0;
return err;
}
@@ -5332,6 +5390,7 @@ static int inet6_valid_dump_ifaddr_req(const struct nlmsghdr *nlh,
static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
enum addr_type_t type)
{
+ struct net *tgt_net = sock_net(skb->sk);
const struct nlmsghdr *nlh = cb->nlh;
struct inet6_fill_args fillargs = {
.portid = NETLINK_CB(cb->skb).portid,
@@ -5340,72 +5399,52 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
.netnsid = -1,
.type = type,
};
- struct net *tgt_net = sock_net(skb->sk);
- int idx, s_idx, s_ip_idx;
- int h, s_h;
+ struct {
+ unsigned long ifindex;
+ int ip_idx;
+ } *ctx = (void *)cb->ctx;
struct net_device *dev;
struct inet6_dev *idev;
- struct hlist_head *head;
int err = 0;
- s_h = cb->args[0];
- s_idx = idx = cb->args[1];
- s_ip_idx = cb->args[2];
-
+ rcu_read_lock();
if (cb->strict_check) {
err = inet6_valid_dump_ifaddr_req(nlh, &fillargs, &tgt_net,
skb->sk, cb);
if (err < 0)
- goto put_tgt_net;
+ goto done;
err = 0;
if (fillargs.ifindex) {
- dev = __dev_get_by_index(tgt_net, fillargs.ifindex);
- if (!dev) {
- err = -ENODEV;
- goto put_tgt_net;
- }
+ err = -ENODEV;
+ dev = dev_get_by_index_rcu(tgt_net, fillargs.ifindex);
+ if (!dev)
+ goto done;
idev = __in6_dev_get(dev);
- if (idev) {
- err = in6_dump_addrs(idev, skb, cb, s_ip_idx,
+ if (idev)
+ err = in6_dump_addrs(idev, skb, cb,
+ &ctx->ip_idx,
&fillargs);
- if (err > 0)
- err = 0;
- }
- goto put_tgt_net;
+ goto done;
}
}
- rcu_read_lock();
cb->seq = inet6_base_seq(tgt_net);
- for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
- idx = 0;
- head = &tgt_net->dev_index_head[h];
- hlist_for_each_entry_rcu(dev, head, index_hlist) {
- if (idx < s_idx)
- goto cont;
- if (h > s_h || idx > s_idx)
- s_ip_idx = 0;
- idev = __in6_dev_get(dev);
- if (!idev)
- goto cont;
-
- if (in6_dump_addrs(idev, skb, cb, s_ip_idx,
- &fillargs) < 0)
- goto done;
-cont:
- idx++;
- }
+ for_each_netdev_dump(tgt_net, dev, ctx->ifindex) {
+ idev = __in6_dev_get(dev);
+ if (!idev)
+ continue;
+ err = in6_dump_addrs(idev, skb, cb, &ctx->ip_idx,
+ &fillargs);
+ if (err < 0)
+ goto done;
}
done:
rcu_read_unlock();
- cb->args[0] = h;
- cb->args[1] = idx;
-put_tgt_net:
if (fillargs.netnsid >= 0)
put_net(tgt_net);
- return skb->len ? : err;
+ return err;
}
static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
@@ -5578,87 +5617,97 @@ errout:
rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
}
-static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
- __s32 *array, int bytes)
+static void ipv6_store_devconf(const struct ipv6_devconf *cnf,
+ __s32 *array, int bytes)
{
BUG_ON(bytes < (DEVCONF_MAX * 4));
memset(array, 0, bytes);
- array[DEVCONF_FORWARDING] = cnf->forwarding;
- array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
- array[DEVCONF_MTU6] = cnf->mtu6;
- array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
- array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
- array[DEVCONF_AUTOCONF] = cnf->autoconf;
- array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
- array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
+ array[DEVCONF_FORWARDING] = READ_ONCE(cnf->forwarding);
+ array[DEVCONF_HOPLIMIT] = READ_ONCE(cnf->hop_limit);
+ array[DEVCONF_MTU6] = READ_ONCE(cnf->mtu6);
+ array[DEVCONF_ACCEPT_RA] = READ_ONCE(cnf->accept_ra);
+ array[DEVCONF_ACCEPT_REDIRECTS] = READ_ONCE(cnf->accept_redirects);
+ array[DEVCONF_AUTOCONF] = READ_ONCE(cnf->autoconf);
+ array[DEVCONF_DAD_TRANSMITS] = READ_ONCE(cnf->dad_transmits);
+ array[DEVCONF_RTR_SOLICITS] = READ_ONCE(cnf->rtr_solicits);
array[DEVCONF_RTR_SOLICIT_INTERVAL] =
- jiffies_to_msecs(cnf->rtr_solicit_interval);
+ jiffies_to_msecs(READ_ONCE(cnf->rtr_solicit_interval));
array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] =
- jiffies_to_msecs(cnf->rtr_solicit_max_interval);
+ jiffies_to_msecs(READ_ONCE(cnf->rtr_solicit_max_interval));
array[DEVCONF_RTR_SOLICIT_DELAY] =
- jiffies_to_msecs(cnf->rtr_solicit_delay);
- array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
+ jiffies_to_msecs(READ_ONCE(cnf->rtr_solicit_delay));
+ array[DEVCONF_FORCE_MLD_VERSION] = READ_ONCE(cnf->force_mld_version);
array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
- jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
+ jiffies_to_msecs(READ_ONCE(cnf->mldv1_unsolicited_report_interval));
array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
- jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
- array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
- array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
- array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
- array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
- array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
- array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
- array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
- array[DEVCONF_RA_DEFRTR_METRIC] = cnf->ra_defrtr_metric;
- array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit;
- array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
+ jiffies_to_msecs(READ_ONCE(cnf->mldv2_unsolicited_report_interval));
+ array[DEVCONF_USE_TEMPADDR] = READ_ONCE(cnf->use_tempaddr);
+ array[DEVCONF_TEMP_VALID_LFT] = READ_ONCE(cnf->temp_valid_lft);
+ array[DEVCONF_TEMP_PREFERED_LFT] = READ_ONCE(cnf->temp_prefered_lft);
+ array[DEVCONF_REGEN_MAX_RETRY] = READ_ONCE(cnf->regen_max_retry);
+ array[DEVCONF_MAX_DESYNC_FACTOR] = READ_ONCE(cnf->max_desync_factor);
+ array[DEVCONF_MAX_ADDRESSES] = READ_ONCE(cnf->max_addresses);
+ array[DEVCONF_ACCEPT_RA_DEFRTR] = READ_ONCE(cnf->accept_ra_defrtr);
+ array[DEVCONF_RA_DEFRTR_METRIC] = READ_ONCE(cnf->ra_defrtr_metric);
+ array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] =
+ READ_ONCE(cnf->accept_ra_min_hop_limit);
+ array[DEVCONF_ACCEPT_RA_PINFO] = READ_ONCE(cnf->accept_ra_pinfo);
#ifdef CONFIG_IPV6_ROUTER_PREF
- array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
+ array[DEVCONF_ACCEPT_RA_RTR_PREF] = READ_ONCE(cnf->accept_ra_rtr_pref);
array[DEVCONF_RTR_PROBE_INTERVAL] =
- jiffies_to_msecs(cnf->rtr_probe_interval);
+ jiffies_to_msecs(READ_ONCE(cnf->rtr_probe_interval));
#ifdef CONFIG_IPV6_ROUTE_INFO
- array[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN] = cnf->accept_ra_rt_info_min_plen;
- array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
+ array[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN] =
+ READ_ONCE(cnf->accept_ra_rt_info_min_plen);
+ array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] =
+ READ_ONCE(cnf->accept_ra_rt_info_max_plen);
#endif
#endif
- array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
- array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
+ array[DEVCONF_PROXY_NDP] = READ_ONCE(cnf->proxy_ndp);
+ array[DEVCONF_ACCEPT_SOURCE_ROUTE] =
+ READ_ONCE(cnf->accept_source_route);
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
- array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
- array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic;
+ array[DEVCONF_OPTIMISTIC_DAD] = READ_ONCE(cnf->optimistic_dad);
+ array[DEVCONF_USE_OPTIMISTIC] = READ_ONCE(cnf->use_optimistic);
#endif
#ifdef CONFIG_IPV6_MROUTE
array[DEVCONF_MC_FORWARDING] = atomic_read(&cnf->mc_forwarding);
#endif
- array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
- array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
- array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
- array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
- array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
- array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local;
- array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu;
- array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown;
+ array[DEVCONF_DISABLE_IPV6] = READ_ONCE(cnf->disable_ipv6);
+ array[DEVCONF_ACCEPT_DAD] = READ_ONCE(cnf->accept_dad);
+ array[DEVCONF_FORCE_TLLAO] = READ_ONCE(cnf->force_tllao);
+ array[DEVCONF_NDISC_NOTIFY] = READ_ONCE(cnf->ndisc_notify);
+ array[DEVCONF_SUPPRESS_FRAG_NDISC] =
+ READ_ONCE(cnf->suppress_frag_ndisc);
+ array[DEVCONF_ACCEPT_RA_FROM_LOCAL] =
+ READ_ONCE(cnf->accept_ra_from_local);
+ array[DEVCONF_ACCEPT_RA_MTU] = READ_ONCE(cnf->accept_ra_mtu);
+ array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] =
+ READ_ONCE(cnf->ignore_routes_with_linkdown);
/* we omit DEVCONF_STABLE_SECRET for now */
- array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only;
- array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast;
- array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na;
- array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down;
- array[DEVCONF_SEG6_ENABLED] = cnf->seg6_enabled;
+ array[DEVCONF_USE_OIF_ADDRS_ONLY] = READ_ONCE(cnf->use_oif_addrs_only);
+ array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] =
+ READ_ONCE(cnf->drop_unicast_in_l2_multicast);
+ array[DEVCONF_DROP_UNSOLICITED_NA] = READ_ONCE(cnf->drop_unsolicited_na);
+ array[DEVCONF_KEEP_ADDR_ON_DOWN] = READ_ONCE(cnf->keep_addr_on_down);
+ array[DEVCONF_SEG6_ENABLED] = READ_ONCE(cnf->seg6_enabled);
#ifdef CONFIG_IPV6_SEG6_HMAC
- array[DEVCONF_SEG6_REQUIRE_HMAC] = cnf->seg6_require_hmac;
+ array[DEVCONF_SEG6_REQUIRE_HMAC] = READ_ONCE(cnf->seg6_require_hmac);
#endif
- array[DEVCONF_ENHANCED_DAD] = cnf->enhanced_dad;
- array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode;
- array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy;
- array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass;
- array[DEVCONF_RPL_SEG_ENABLED] = cnf->rpl_seg_enabled;
- array[DEVCONF_IOAM6_ENABLED] = cnf->ioam6_enabled;
- array[DEVCONF_IOAM6_ID] = cnf->ioam6_id;
- array[DEVCONF_IOAM6_ID_WIDE] = cnf->ioam6_id_wide;
- array[DEVCONF_NDISC_EVICT_NOCARRIER] = cnf->ndisc_evict_nocarrier;
- array[DEVCONF_ACCEPT_UNTRACKED_NA] = cnf->accept_untracked_na;
- array[DEVCONF_ACCEPT_RA_MIN_LFT] = cnf->accept_ra_min_lft;
+ array[DEVCONF_ENHANCED_DAD] = READ_ONCE(cnf->enhanced_dad);
+ array[DEVCONF_ADDR_GEN_MODE] = READ_ONCE(cnf->addr_gen_mode);
+ array[DEVCONF_DISABLE_POLICY] = READ_ONCE(cnf->disable_policy);
+ array[DEVCONF_NDISC_TCLASS] = READ_ONCE(cnf->ndisc_tclass);
+ array[DEVCONF_RPL_SEG_ENABLED] = READ_ONCE(cnf->rpl_seg_enabled);
+ array[DEVCONF_IOAM6_ENABLED] = READ_ONCE(cnf->ioam6_enabled);
+ array[DEVCONF_IOAM6_ID] = READ_ONCE(cnf->ioam6_id);
+ array[DEVCONF_IOAM6_ID_WIDE] = READ_ONCE(cnf->ioam6_id_wide);
+ array[DEVCONF_NDISC_EVICT_NOCARRIER] =
+ READ_ONCE(cnf->ndisc_evict_nocarrier);
+ array[DEVCONF_ACCEPT_UNTRACKED_NA] =
+ READ_ONCE(cnf->accept_untracked_na);
+ array[DEVCONF_ACCEPT_RA_MIN_LFT] = READ_ONCE(cnf->accept_ra_min_lft);
}
static inline size_t inet6_ifla6_size(void)
@@ -5738,13 +5787,14 @@ static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev,
u32 ext_filter_mask)
{
- struct nlattr *nla;
struct ifla_cacheinfo ci;
+ struct nlattr *nla;
+ u32 ra_mtu;
- if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
+ if (nla_put_u32(skb, IFLA_INET6_FLAGS, READ_ONCE(idev->if_flags)))
goto nla_put_failure;
ci.max_reasm_len = IPV6_MAXPLEN;
- ci.tstamp = cstamp_delta(idev->tstamp);
+ ci.tstamp = cstamp_delta(READ_ONCE(idev->tstamp));
ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME));
if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
@@ -5776,11 +5826,12 @@ static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev,
memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
read_unlock_bh(&idev->lock);
- if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->cnf.addr_gen_mode))
+ if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE,
+ READ_ONCE(idev->cnf.addr_gen_mode)))
goto nla_put_failure;
- if (idev->ra_mtu &&
- nla_put_u32(skb, IFLA_INET6_RA_MTU, idev->ra_mtu))
+ ra_mtu = READ_ONCE(idev->ra_mtu);
+ if (ra_mtu && nla_put_u32(skb, IFLA_INET6_RA_MTU, ra_mtu))
goto nla_put_failure;
return 0;
@@ -5842,7 +5893,7 @@ static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token,
return -EINVAL;
}
- if (idev->cnf.rtr_solicits == 0) {
+ if (READ_ONCE(idev->cnf.rtr_solicits) == 0) {
NL_SET_ERR_MSG(extack,
"Router solicitation is disabled on device");
return -EINVAL;
@@ -5875,7 +5926,7 @@ update_lft:
if (update_rs) {
idev->if_flags |= IF_RS_SENT;
idev->rs_interval = rfc3315_s14_backoff_init(
- idev->cnf.rtr_solicit_interval);
+ READ_ONCE(idev->cnf.rtr_solicit_interval));
idev->rs_probes = 1;
addrconf_mod_rs_timer(idev, idev->rs_interval);
}
@@ -5981,7 +6032,7 @@ static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla,
if (tb[IFLA_INET6_ADDR_GEN_MODE]) {
u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]);
- idev->cnf.addr_gen_mode = mode;
+ WRITE_ONCE(idev->cnf.addr_gen_mode, mode);
}
return 0;
@@ -5993,6 +6044,7 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
struct net_device *dev = idev->dev;
struct ifinfomsg *hdr;
struct nlmsghdr *nlh;
+ int ifindex, iflink;
void *protoinfo;
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
@@ -6003,18 +6055,20 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
hdr->ifi_family = AF_INET6;
hdr->__ifi_pad = 0;
hdr->ifi_type = dev->type;
- hdr->ifi_index = dev->ifindex;
+ ifindex = READ_ONCE(dev->ifindex);
+ hdr->ifi_index = ifindex;
hdr->ifi_flags = dev_get_flags(dev);
hdr->ifi_change = 0;
+ iflink = dev_get_iflink(dev);
if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
(dev->addr_len &&
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
- nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
- (dev->ifindex != dev_get_iflink(dev) &&
- nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
+ nla_put_u32(skb, IFLA_MTU, READ_ONCE(dev->mtu)) ||
+ (ifindex != iflink &&
+ nla_put_u32(skb, IFLA_LINK, iflink)) ||
nla_put_u8(skb, IFLA_OPERSTATE,
- netif_running(dev) ? dev->operstate : IF_OPER_DOWN))
+ netif_running(dev) ? READ_ONCE(dev->operstate) : IF_OPER_DOWN))
goto nla_put_failure;
protoinfo = nla_nest_start_noflag(skb, IFLA_PROTINFO);
if (!protoinfo)
@@ -6060,50 +6114,39 @@ static int inet6_valid_dump_ifinfo(const struct nlmsghdr *nlh,
static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
- int h, s_h;
- int idx = 0, s_idx;
+ struct {
+ unsigned long ifindex;
+ } *ctx = (void *)cb->ctx;
struct net_device *dev;
struct inet6_dev *idev;
- struct hlist_head *head;
+ int err;
/* only requests using strict checking can pass data to
* influence the dump
*/
if (cb->strict_check) {
- int err = inet6_valid_dump_ifinfo(cb->nlh, cb->extack);
+ err = inet6_valid_dump_ifinfo(cb->nlh, cb->extack);
if (err < 0)
return err;
}
- s_h = cb->args[0];
- s_idx = cb->args[1];
-
+ err = 0;
rcu_read_lock();
- for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
- idx = 0;
- head = &net->dev_index_head[h];
- hlist_for_each_entry_rcu(dev, head, index_hlist) {
- if (idx < s_idx)
- goto cont;
- idev = __in6_dev_get(dev);
- if (!idev)
- goto cont;
- if (inet6_fill_ifinfo(skb, idev,
- NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq,
- RTM_NEWLINK, NLM_F_MULTI) < 0)
- goto out;
-cont:
- idx++;
- }
+ for_each_netdev_dump(net, dev, ctx->ifindex) {
+ idev = __in6_dev_get(dev);
+ if (!idev)
+ continue;
+ err = inet6_fill_ifinfo(skb, idev,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ RTM_NEWLINK, NLM_F_MULTI);
+ if (err < 0)
+ break;
}
-out:
rcu_read_unlock();
- cb->args[1] = idx;
- cb->args[0] = h;
- return skb->len;
+ return err;
}
void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
@@ -6324,7 +6367,8 @@ static void addrconf_disable_change(struct net *net, __s32 newf)
idev = __in6_dev_get(dev);
if (idev) {
int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
- idev->cnf.disable_ipv6 = newf;
+
+ WRITE_ONCE(idev->cnf.disable_ipv6, newf);
if (changed)
dev_disable_change(idev);
}
@@ -6333,23 +6377,22 @@ static void addrconf_disable_change(struct net *net, __s32 newf)
static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
{
- struct net *net;
+ struct net *net = (struct net *)table->extra2;
int old;
+ if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
+ WRITE_ONCE(*p, newf);
+ return 0;
+ }
+
if (!rtnl_trylock())
return restart_syscall();
- net = (struct net *)table->extra2;
old = *p;
- *p = newf;
-
- if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
- rtnl_unlock();
- return 0;
- }
+ WRITE_ONCE(*p, newf);
if (p == &net->ipv6.devconf_all->disable_ipv6) {
- net->ipv6.devconf_dflt->disable_ipv6 = newf;
+ WRITE_ONCE(net->ipv6.devconf_dflt->disable_ipv6, newf);
addrconf_disable_change(net, newf);
} else if ((!newf) ^ (!old))
dev_disable_change((struct inet6_dev *)table->extra1);
@@ -6460,24 +6503,25 @@ static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write,
}
if (idev->cnf.addr_gen_mode != new_val) {
- idev->cnf.addr_gen_mode = new_val;
+ WRITE_ONCE(idev->cnf.addr_gen_mode, new_val);
addrconf_init_auto_addrs(idev->dev);
}
} else if (&net->ipv6.devconf_all->addr_gen_mode == ctl->data) {
struct net_device *dev;
- net->ipv6.devconf_dflt->addr_gen_mode = new_val;
+ WRITE_ONCE(net->ipv6.devconf_dflt->addr_gen_mode, new_val);
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
if (idev &&
idev->cnf.addr_gen_mode != new_val) {
- idev->cnf.addr_gen_mode = new_val;
+ WRITE_ONCE(idev->cnf.addr_gen_mode,
+ new_val);
addrconf_init_auto_addrs(idev->dev);
}
}
}
- *((u32 *)ctl->data) = new_val;
+ WRITE_ONCE(*((u32 *)ctl->data), new_val);
}
out:
@@ -6536,14 +6580,15 @@ static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write,
struct inet6_dev *idev = __in6_dev_get(dev);
if (idev) {
- idev->cnf.addr_gen_mode =
- IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+ WRITE_ONCE(idev->cnf.addr_gen_mode,
+ IN6_ADDR_GEN_MODE_STABLE_PRIVACY);
}
}
} else {
struct inet6_dev *idev = ctl->extra1;
- idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+ WRITE_ONCE(idev->cnf.addr_gen_mode,
+ IN6_ADDR_GEN_MODE_STABLE_PRIVACY);
}
out:
@@ -6623,20 +6668,19 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val)
static
int addrconf_disable_policy(struct ctl_table *ctl, int *valp, int val)
{
+ struct net *net = (struct net *)ctl->extra2;
struct inet6_dev *idev;
- struct net *net;
- if (!rtnl_trylock())
- return restart_syscall();
-
- *valp = val;
-
- net = (struct net *)ctl->extra2;
if (valp == &net->ipv6.devconf_dflt->disable_policy) {
- rtnl_unlock();
+ WRITE_ONCE(*valp, val);
return 0;
}
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ WRITE_ONCE(*valp, val);
+
if (valp == &net->ipv6.devconf_all->disable_policy) {
struct net_device *dev;
@@ -6806,6 +6850,13 @@ static const struct ctl_table addrconf_sysctl[] = {
.proc_handler = proc_dointvec,
},
{
+ .procname = "regen_min_advance",
+ .data = &ipv6_devconf.regen_min_advance,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
.procname = "regen_max_retry",
.data = &ipv6_devconf.regen_max_retry,
.maxlen = sizeof(int),
@@ -7365,7 +7416,8 @@ int __init addrconf_init(void)
if (err < 0)
goto out_addrlabel;
- addrconf_wq = create_workqueue("ipv6_addrconf");
+ /* All works using addrconf_wq need to lock rtnl. */
+ addrconf_wq = create_singlethread_workqueue("ipv6_addrconf");
if (!addrconf_wq) {
err = -ENOMEM;
goto out_nowq;
@@ -7388,7 +7440,7 @@ int __init addrconf_init(void)
rtnl_af_register(&inet6_ops);
err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETLINK,
- NULL, inet6_dump_ifinfo, 0);
+ NULL, inet6_dump_ifinfo, RTNL_FLAG_DUMP_UNLOCKED);
if (err < 0)
goto errout;
@@ -7402,21 +7454,25 @@ int __init addrconf_init(void)
goto errout;
err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETADDR,
inet6_rtm_getaddr, inet6_dump_ifaddr,
- RTNL_FLAG_DOIT_UNLOCKED);
+ RTNL_FLAG_DOIT_UNLOCKED |
+ RTNL_FLAG_DUMP_UNLOCKED);
if (err < 0)
goto errout;
err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETMULTICAST,
- NULL, inet6_dump_ifmcaddr, 0);
+ NULL, inet6_dump_ifmcaddr,
+ RTNL_FLAG_DUMP_UNLOCKED);
if (err < 0)
goto errout;
err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETANYCAST,
- NULL, inet6_dump_ifacaddr, 0);
+ NULL, inet6_dump_ifacaddr,
+ RTNL_FLAG_DUMP_UNLOCKED);
if (err < 0)
goto errout;
err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETNETCONF,
inet6_netconf_get_devconf,
inet6_netconf_dump_devconf,
- RTNL_FLAG_DOIT_UNLOCKED);
+ RTNL_FLAG_DOIT_UNLOCKED |
+ RTNL_FLAG_DUMP_UNLOCKED);
if (err < 0)
goto errout;
err = ipv6_addr_label_rtnl_register();
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 18:27:31 +0000