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authorEric Dumazet <edumazet@google.com>2024-03-06 16:00:29 +0000
committerJakub Kicinski <kuba@kernel.org>2024-03-07 21:12:43 -0800
commitdf51b84564159cdd91a67ee0f9e30b42b3a73cef (patch)
tree14d8de05a58c1b997bc3815bfb7c3aac0f1cb8d0
parent5af674bb90a030317a02419e04b66ec0dc892dcd (diff)
ipv6: move tcp_ipv6_hash_secret and udp_ipv6_hash_secret to net_hotdata
Use a 32bit hole in "struct net_offload" to store the remaining 32bit secrets used by TCPv6 and UDPv6. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-17-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--include/net/hotdata.h2
-rw-r--r--include/net/protocol.h1
-rw-r--r--net/ipv6/inet6_hashtables.c6
-rw-r--r--net/ipv6/udp.c2
4 files changed, 5 insertions, 6 deletions
diff --git a/include/net/hotdata.h b/include/net/hotdata.h
index 6d5cd967183a..b0b847585f7e 100644
--- a/include/net/hotdata.h
+++ b/include/net/hotdata.h
@@ -39,7 +39,9 @@ struct net_hotdata {
#define inet_ehash_secret net_hotdata.tcp_protocol.secret
#define udp_ehash_secret net_hotdata.udp_protocol.secret
#define inet6_ehash_secret net_hotdata.tcpv6_protocol.secret
+#define tcp_ipv6_hash_secret net_hotdata.tcpv6_offload.secret
#define udp6_ehash_secret net_hotdata.udpv6_protocol.secret
+#define udp_ipv6_hash_secret net_hotdata.udpv6_offload.secret
extern struct net_hotdata net_hotdata;
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 213649d2ab09..b2499f88f8f8 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -70,6 +70,7 @@ struct inet6_protocol {
struct net_offload {
struct offload_callbacks callbacks;
unsigned int flags; /* Flags used by IPv6 for now */
+ u32 secret;
};
/* This should be set for any extension header which is compatible with GSO. */
#define INET6_PROTO_GSO_EXTHDR 0x1
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 0fee97f3166c..2e81383b663b 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -26,15 +26,13 @@ u32 inet6_ehashfn(const struct net *net,
const struct in6_addr *laddr, const u16 lport,
const struct in6_addr *faddr, const __be16 fport)
{
- static u32 ipv6_hash_secret __read_mostly;
-
u32 lhash, fhash;
net_get_random_once(&inet6_ehash_secret, sizeof(inet6_ehash_secret));
- net_get_random_once(&ipv6_hash_secret, sizeof(ipv6_hash_secret));
+ net_get_random_once(&tcp_ipv6_hash_secret, sizeof(tcp_ipv6_hash_secret));
lhash = (__force u32)laddr->s6_addr32[3];
- fhash = __ipv6_addr_jhash(faddr, ipv6_hash_secret);
+ fhash = __ipv6_addr_jhash(faddr, tcp_ipv6_hash_secret);
return __inet6_ehashfn(lhash, lport, fhash, fport,
inet6_ehash_secret + net_hash_mix(net));
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 1e1c67a51675..80ad8f436b17 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -79,8 +79,6 @@ u32 udp6_ehashfn(const struct net *net,
const struct in6_addr *faddr,
const __be16 fport)
{
- static u32 udp_ipv6_hash_secret __read_mostly;
-
u32 lhash, fhash;
net_get_random_once(&udp6_ehash_secret,