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-rw-r--r--net/ipv6/af_inet6.c2
-rw-r--r--net/ipv6/icmp.c28
-rw-r--r--net/ipv6/ila/ila_main.c5
-rw-r--r--net/ipv6/output_core.c30
-rw-r--r--net/ipv6/route.c63
-rw-r--r--net/ipv6/seg6.c5
-rw-r--r--net/ipv6/tcp_ipv6.c56
7 files changed, 107 insertions, 82 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 2f45d2a3e3a3..fa6b404cbd10 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -847,6 +847,8 @@ static int __net_init inet6_net_init(struct net *net)
net->ipv6.sysctl.bindv6only = 0;
net->ipv6.sysctl.icmpv6_time = 1*HZ;
net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
+ net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
+ net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
net->ipv6.sysctl.flowlabel_consistency = 1;
net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
net->ipv6.sysctl.idgen_retries = 3;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 802faa2fcc0e..cc14b9998941 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -683,12 +683,20 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
struct dst_entry *dst;
struct ipcm6_cookie ipc6;
u32 mark = IP6_REPLY_MARK(net, skb->mark);
+ bool acast;
+
+ if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) &&
+ net->ipv6.sysctl.icmpv6_echo_ignore_multicast)
+ return;
saddr = &ipv6_hdr(skb)->daddr;
+ acast = ipv6_anycast_destination(skb_dst(skb), saddr);
+ if (acast && net->ipv6.sysctl.icmpv6_echo_ignore_anycast)
+ return;
+
if (!ipv6_unicast_destination(skb) &&
- !(net->ipv6.sysctl.anycast_src_echo_reply &&
- ipv6_anycast_destination(skb_dst(skb), saddr)))
+ !(net->ipv6.sysctl.anycast_src_echo_reply && acast))
saddr = NULL;
memcpy(&tmp_hdr, icmph, sizeof(tmp_hdr));
@@ -1115,6 +1123,20 @@ static struct ctl_table ipv6_icmp_table_template[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
+ {
+ .procname = "echo_ignore_multicast",
+ .data = &init_net.ipv6.sysctl.icmpv6_echo_ignore_multicast,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "echo_ignore_anycast",
+ .data = &init_net.ipv6.sysctl.icmpv6_echo_ignore_anycast,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
{ },
};
@@ -1129,6 +1151,8 @@ struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
if (table) {
table[0].data = &net->ipv6.sysctl.icmpv6_time;
table[1].data = &net->ipv6.sysctl.icmpv6_echo_ignore_all;
+ table[2].data = &net->ipv6.sysctl.icmpv6_echo_ignore_multicast;
+ table[3].data = &net->ipv6.sysctl.icmpv6_echo_ignore_anycast;
}
return table;
}
diff --git a/net/ipv6/ila/ila_main.c b/net/ipv6/ila/ila_main.c
index 18fac76b9520..8d31a5066d0c 100644
--- a/net/ipv6/ila/ila_main.c
+++ b/net/ipv6/ila/ila_main.c
@@ -17,19 +17,16 @@ static const struct genl_ops ila_nl_ops[] = {
{
.cmd = ILA_CMD_ADD,
.doit = ila_xlat_nl_cmd_add_mapping,
- .policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_DEL,
.doit = ila_xlat_nl_cmd_del_mapping,
- .policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_FLUSH,
.doit = ila_xlat_nl_cmd_flush,
- .policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
@@ -38,7 +35,6 @@ static const struct genl_ops ila_nl_ops[] = {
.start = ila_xlat_nl_dump_start,
.dumpit = ila_xlat_nl_dump,
.done = ila_xlat_nl_dump_done,
- .policy = ila_nl_policy,
},
};
@@ -49,6 +45,7 @@ struct genl_family ila_nl_family __ro_after_init = {
.name = ILA_GENL_NAME,
.version = ILA_GENL_VERSION,
.maxattr = ILA_ATTR_MAX,
+ .policy = ila_nl_policy,
.netnsok = true,
.parallel_ops = true,
.module = THIS_MODULE,
diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index 4fe7c90962dd..868ae23dbae1 100644
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -10,15 +10,25 @@
#include <net/secure_seq.h>
#include <linux/netfilter.h>
-static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
+static u32 __ipv6_select_ident(struct net *net,
const struct in6_addr *dst,
const struct in6_addr *src)
{
+ const struct {
+ struct in6_addr dst;
+ struct in6_addr src;
+ } __aligned(SIPHASH_ALIGNMENT) combined = {
+ .dst = *dst,
+ .src = *src,
+ };
u32 hash, id;
- hash = __ipv6_addr_jhash(dst, hashrnd);
- hash = __ipv6_addr_jhash(src, hash);
- hash ^= net_hash_mix(net);
+ /* Note the following code is not safe, but this is okay. */
+ if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))
+ get_random_bytes(&net->ipv4.ip_id_key,
+ sizeof(net->ipv4.ip_id_key));
+
+ hash = siphash(&combined, sizeof(combined), &net->ipv4.ip_id_key);
/* Treat id of 0 as unset and if we get 0 back from ip_idents_reserve,
* set the hight order instead thus minimizing possible future
@@ -41,7 +51,6 @@ static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
*/
__be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
{
- static u32 ip6_proxy_idents_hashrnd __read_mostly;
struct in6_addr buf[2];
struct in6_addr *addrs;
u32 id;
@@ -53,11 +62,7 @@ __be32 ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
if (!addrs)
return 0;
- net_get_random_once(&ip6_proxy_idents_hashrnd,
- sizeof(ip6_proxy_idents_hashrnd));
-
- id = __ipv6_select_ident(net, ip6_proxy_idents_hashrnd,
- &addrs[1], &addrs[0]);
+ id = __ipv6_select_ident(net, &addrs[1], &addrs[0]);
return htonl(id);
}
EXPORT_SYMBOL_GPL(ipv6_proxy_select_ident);
@@ -66,12 +71,9 @@ __be32 ipv6_select_ident(struct net *net,
const struct in6_addr *daddr,
const struct in6_addr *saddr)
{
- static u32 ip6_idents_hashrnd __read_mostly;
u32 id;
- net_get_random_once(&ip6_idents_hashrnd, sizeof(ip6_idents_hashrnd));
-
- id = __ipv6_select_ident(net, ip6_idents_hashrnd, daddr, saddr);
+ id = __ipv6_select_ident(net, daddr, saddr);
return htonl(id);
}
EXPORT_SYMBOL(ipv6_select_ident);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0302e0eb07af..61f231f58da5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1015,14 +1015,13 @@ static struct fib6_node* fib6_backtrack(struct fib6_node *fn,
}
}
-static bool ip6_hold_safe(struct net *net, struct rt6_info **prt,
- bool null_fallback)
+static bool ip6_hold_safe(struct net *net, struct rt6_info **prt)
{
struct rt6_info *rt = *prt;
if (dst_hold_safe(&rt->dst))
return true;
- if (null_fallback) {
+ if (net) {
rt = net->ipv6.ip6_null_entry;
dst_hold(&rt->dst);
} else {
@@ -1095,7 +1094,7 @@ restart:
/* Search through exception table */
rt = rt6_find_cached_rt(f6i, &fl6->daddr, &fl6->saddr);
if (rt) {
- if (ip6_hold_safe(net, &rt, true))
+ if (ip6_hold_safe(net, &rt))
dst_use_noref(&rt->dst, jiffies);
} else if (f6i == net->ipv6.fib6_null_entry) {
rt = net->ipv6.ip6_null_entry;
@@ -1242,7 +1241,7 @@ static struct rt6_info *rt6_get_pcpu_route(struct fib6_info *rt)
pcpu_rt = *p;
if (pcpu_rt)
- ip6_hold_safe(NULL, &pcpu_rt, false);
+ ip6_hold_safe(NULL, &pcpu_rt);
return pcpu_rt;
}
@@ -1867,7 +1866,7 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
/*Search through exception table */
rt = rt6_find_cached_rt(f6i, &fl6->daddr, &fl6->saddr);
if (rt) {
- if (ip6_hold_safe(net, &rt, true))
+ if (ip6_hold_safe(net, &rt))
dst_use_noref(&rt->dst, jiffies);
rcu_read_unlock();
@@ -2482,7 +2481,7 @@ restart:
out:
if (ret)
- ip6_hold_safe(net, &ret, true);
+ ip6_hold_safe(net, &ret);
else
ret = ip6_create_rt_rcu(rt);
@@ -2953,9 +2952,6 @@ static struct fib6_info *ip6_route_info_create(struct fib6_config *cfg,
goto out;
}
- if (cfg->fc_metric == 0)
- cfg->fc_metric = IP6_RT_PRIO_USER;
-
if (cfg->fc_flags & RTNH_F_ONLINK) {
if (!dev) {
NL_SET_ERR_MSG(extack,
@@ -3084,7 +3080,7 @@ static struct fib6_info *ip6_route_info_create(struct fib6_config *cfg,
goto out;
}
- if (!(dev->flags & IFF_UP)) {
+ if (!(dev->flags & IFF_UP) && !cfg->fc_ignore_dev_down) {
NL_SET_ERR_MSG(extack, "Nexthop device is not up");
err = -ENETDOWN;
goto out;
@@ -3606,7 +3602,7 @@ static void rtmsg_to_fib6_config(struct net *net,
.fc_table = l3mdev_fib_table_by_index(net, rtmsg->rtmsg_ifindex) ?
: RT6_TABLE_MAIN,
.fc_ifindex = rtmsg->rtmsg_ifindex,
- .fc_metric = rtmsg->rtmsg_metric,
+ .fc_metric = rtmsg->rtmsg_metric ? : IP6_RT_PRIO_USER,
.fc_expires = rtmsg->rtmsg_info,
.fc_dst_len = rtmsg->rtmsg_dst_len,
.fc_src_len = rtmsg->rtmsg_src_len,
@@ -3717,36 +3713,26 @@ struct fib6_info *addrconf_f6i_alloc(struct net *net,
const struct in6_addr *addr,
bool anycast, gfp_t gfp_flags)
{
- u32 tb_id;
- struct net_device *dev = idev->dev;
- struct fib6_info *f6i;
-
- f6i = fib6_info_alloc(gfp_flags);
- if (!f6i)
- return ERR_PTR(-ENOMEM);
+ struct fib6_config cfg = {
+ .fc_table = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL,
+ .fc_ifindex = idev->dev->ifindex,
+ .fc_flags = RTF_UP | RTF_ADDRCONF | RTF_NONEXTHOP,
+ .fc_dst = *addr,
+ .fc_dst_len = 128,
+ .fc_protocol = RTPROT_KERNEL,
+ .fc_nlinfo.nl_net = net,
+ .fc_ignore_dev_down = true,
+ };
- f6i->fib6_metrics = ip_fib_metrics_init(net, NULL, 0, NULL);
- f6i->dst_nocount = true;
- f6i->dst_host = true;
- f6i->fib6_protocol = RTPROT_KERNEL;
- f6i->fib6_flags = RTF_UP | RTF_NONEXTHOP;
if (anycast) {
- f6i->fib6_type = RTN_ANYCAST;
- f6i->fib6_flags |= RTF_ANYCAST;
+ cfg.fc_type = RTN_ANYCAST;
+ cfg.fc_flags |= RTF_ANYCAST;
} else {
- f6i->fib6_type = RTN_LOCAL;
- f6i->fib6_flags |= RTF_LOCAL;
+ cfg.fc_type = RTN_LOCAL;
+ cfg.fc_flags |= RTF_LOCAL;
}
- f6i->fib6_nh.nh_gw = *addr;
- dev_hold(dev);
- f6i->fib6_nh.nh_dev = dev;
- f6i->fib6_dst.addr = *addr;
- f6i->fib6_dst.plen = 128;
- tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL;
- f6i->fib6_table = fib6_get_table(net, tb_id);
-
- return f6i;
+ return ip6_route_info_create(&cfg, gfp_flags, NULL);
}
/* remove deleted ip from prefsrc entries */
@@ -4526,6 +4512,9 @@ static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
if (err < 0)
return err;
+ if (cfg.fc_metric == 0)
+ cfg.fc_metric = IP6_RT_PRIO_USER;
+
if (cfg.fc_mp)
return ip6_route_multipath_add(&cfg, extack);
else
diff --git a/net/ipv6/seg6.c b/net/ipv6/seg6.c
index 9b2f272ca164..ceff773471e7 100644
--- a/net/ipv6/seg6.c
+++ b/net/ipv6/seg6.c
@@ -399,7 +399,6 @@ static const struct genl_ops seg6_genl_ops[] = {
{
.cmd = SEG6_CMD_SETHMAC,
.doit = seg6_genl_sethmac,
- .policy = seg6_genl_policy,
.flags = GENL_ADMIN_PERM,
},
{
@@ -407,19 +406,16 @@ static const struct genl_ops seg6_genl_ops[] = {
.start = seg6_genl_dumphmac_start,
.dumpit = seg6_genl_dumphmac,
.done = seg6_genl_dumphmac_done,
- .policy = seg6_genl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = SEG6_CMD_SET_TUNSRC,
.doit = seg6_genl_set_tunsrc,
- .policy = seg6_genl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = SEG6_CMD_GET_TUNSRC,
.doit = seg6_genl_get_tunsrc,
- .policy = seg6_genl_policy,
.flags = GENL_ADMIN_PERM,
},
};
@@ -429,6 +425,7 @@ static struct genl_family seg6_genl_family __ro_after_init = {
.name = SEG6_GENL_NAME,
.version = SEG6_GENL_VERSION,
.maxattr = SEG6_ATTR_MAX,
+ .policy = seg6_genl_policy,
.netnsok = true,
.parallel_ops = true,
.ops = seg6_genl_ops,
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 44d431849d39..eec814fe53b8 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -90,6 +90,17 @@ static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(const struct sock *sk,
}
#endif
+/* Helper returning the inet6 address from a given tcp socket.
+ * It can be used in TCP stack instead of inet6_sk(sk).
+ * This avoids a dereference and allow compiler optimizations.
+ */
+static struct ipv6_pinfo *tcp_inet6_sk(const struct sock *sk)
+{
+ struct tcp6_sock *tcp6 = container_of(tcp_sk(sk), struct tcp6_sock, tcp);
+
+ return &tcp6->inet6;
+}
+
static void inet6_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
@@ -99,7 +110,7 @@ static void inet6_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb)
sk->sk_rx_dst = dst;
inet_sk(sk)->rx_dst_ifindex = skb->skb_iif;
- inet6_sk(sk)->rx_dst_cookie = rt6_get_cookie(rt);
+ tcp_inet6_sk(sk)->rx_dst_cookie = rt6_get_cookie(rt);
}
}
@@ -138,7 +149,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
struct inet_sock *inet = inet_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
+ struct ipv6_pinfo *np = tcp_inet6_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct in6_addr *saddr = NULL, *final_p, final;
struct ipv6_txoptions *opt;
@@ -390,7 +401,7 @@ static int tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (sk->sk_state == TCP_CLOSE)
goto out;
- if (ipv6_hdr(skb)->hop_limit < inet6_sk(sk)->min_hopcount) {
+ if (ipv6_hdr(skb)->hop_limit < tcp_inet6_sk(sk)->min_hopcount) {
__NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
goto out;
}
@@ -405,7 +416,7 @@ static int tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
goto out;
}
- np = inet6_sk(sk);
+ np = tcp_inet6_sk(sk);
if (type == NDISC_REDIRECT) {
if (!sock_owned_by_user(sk)) {
@@ -478,7 +489,7 @@ static int tcp_v6_send_synack(const struct sock *sk, struct dst_entry *dst,
enum tcp_synack_type synack_type)
{
struct inet_request_sock *ireq = inet_rsk(req);
- struct ipv6_pinfo *np = inet6_sk(sk);
+ struct ipv6_pinfo *np = tcp_inet6_sk(sk);
struct ipv6_txoptions *opt;
struct flowi6 *fl6 = &fl->u.ip6;
struct sk_buff *skb;
@@ -737,7 +748,7 @@ static void tcp_v6_init_req(struct request_sock *req,
{
bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);
struct inet_request_sock *ireq = inet_rsk(req);
- const struct ipv6_pinfo *np = inet6_sk(sk_listener);
+ const struct ipv6_pinfo *np = tcp_inet6_sk(sk_listener);
ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
@@ -1066,9 +1077,8 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
{
struct inet_request_sock *ireq;
struct ipv6_pinfo *newnp;
- const struct ipv6_pinfo *np = inet6_sk(sk);
+ const struct ipv6_pinfo *np = tcp_inet6_sk(sk);
struct ipv6_txoptions *opt;
- struct tcp6_sock *newtcp6sk;
struct inet_sock *newinet;
struct tcp_sock *newtp;
struct sock *newsk;
@@ -1088,11 +1098,10 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
if (!newsk)
return NULL;
- newtcp6sk = (struct tcp6_sock *)newsk;
- inet_sk(newsk)->pinet6 = &newtcp6sk->inet6;
+ inet_sk(newsk)->pinet6 = tcp_inet6_sk(newsk);
newinet = inet_sk(newsk);
- newnp = inet6_sk(newsk);
+ newnp = tcp_inet6_sk(newsk);
newtp = tcp_sk(newsk);
memcpy(newnp, np, sizeof(struct ipv6_pinfo));
@@ -1156,12 +1165,11 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
ip6_dst_store(newsk, dst, NULL, NULL);
inet6_sk_rx_dst_set(newsk, skb);
- newtcp6sk = (struct tcp6_sock *)newsk;
- inet_sk(newsk)->pinet6 = &newtcp6sk->inet6;
+ inet_sk(newsk)->pinet6 = tcp_inet6_sk(newsk);
newtp = tcp_sk(newsk);
newinet = inet_sk(newsk);
- newnp = inet6_sk(newsk);
+ newnp = tcp_inet6_sk(newsk);
memcpy(newnp, np, sizeof(struct ipv6_pinfo));
@@ -1276,9 +1284,9 @@ out:
*/
static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
{
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct tcp_sock *tp;
+ struct ipv6_pinfo *np = tcp_inet6_sk(sk);
struct sk_buff *opt_skb = NULL;
+ struct tcp_sock *tp;
/* Imagine: socket is IPv6. IPv4 packet arrives,
goes to IPv4 receive handler and backlogged.
@@ -1428,6 +1436,7 @@ static void tcp_v6_fill_cb(struct sk_buff *skb, const struct ipv6hdr *hdr,
static int tcp_v6_rcv(struct sk_buff *skb)
{
+ struct sk_buff *skb_to_free;
int sdif = inet6_sdif(skb);
const struct tcphdr *th;
const struct ipv6hdr *hdr;
@@ -1524,7 +1533,7 @@ process:
return 0;
}
}
- if (hdr->hop_limit < inet6_sk(sk)->min_hopcount) {
+ if (hdr->hop_limit < tcp_inet6_sk(sk)->min_hopcount) {
__NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP);
goto discard_and_relse;
}
@@ -1554,12 +1563,17 @@ process:
tcp_segs_in(tcp_sk(sk), skb);
ret = 0;
if (!sock_owned_by_user(sk)) {
+ skb_to_free = sk->sk_rx_skb_cache;
+ sk->sk_rx_skb_cache = NULL;
ret = tcp_v6_do_rcv(sk, skb);
- } else if (tcp_add_backlog(sk, skb)) {
- goto discard_and_relse;
+ } else {
+ if (tcp_add_backlog(sk, skb))
+ goto discard_and_relse;
+ skb_to_free = NULL;
}
bh_unlock_sock(sk);
-
+ if (skb_to_free)
+ __kfree_skb(skb_to_free);
put_and_return:
if (refcounted)
sock_put(sk);
@@ -1669,7 +1683,7 @@ static void tcp_v6_early_demux(struct sk_buff *skb)
struct dst_entry *dst = READ_ONCE(sk->sk_rx_dst);
if (dst)
- dst = dst_check(dst, inet6_sk(sk)->rx_dst_cookie);
+ dst = dst_check(dst, tcp_inet6_sk(sk)->rx_dst_cookie);
if (dst &&
inet_sk(sk)->rx_dst_ifindex == skb->skb_iif)
skb_dst_set_noref(skb, dst);
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-22 15:36:52 +0000