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-rw-r--r--include/net/inet_sock.h5
-rw-r--r--include/net/inet_timewait_sock.h20
-rw-r--r--include/net/sock.h37
-rw-r--r--net/core/sock.c11
-rw-r--r--net/ipv4/inet_connection_sock.c7
-rw-r--r--net/ipv6/udp.c4
6 files changed, 45 insertions, 39 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 8945f9fb192..8181498fa96 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -116,8 +116,9 @@ struct inet_sock {
struct ipv6_pinfo *pinet6;
#endif
/* Socket demultiplex comparisons on incoming packets. */
- __be32 inet_daddr;
- __be32 inet_rcv_saddr;
+#define inet_daddr sk.__sk_common.skc_daddr
+#define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
+
__be16 inet_dport;
__u16 inet_num;
__be32 inet_saddr;
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index a066fdd50da..17404b5388a 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -88,12 +88,6 @@ extern void inet_twdr_hangman(unsigned long data);
extern void inet_twdr_twkill_work(struct work_struct *work);
extern void inet_twdr_twcal_tick(unsigned long data);
-#if (BITS_PER_LONG == 64)
-#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 8
-#else
-#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 4
-#endif
-
struct inet_bind_bucket;
/*
@@ -117,15 +111,15 @@ struct inet_timewait_sock {
#define tw_hash __tw_common.skc_hash
#define tw_prot __tw_common.skc_prot
#define tw_net __tw_common.skc_net
+#define tw_daddr __tw_common.skc_daddr
+#define tw_rcv_saddr __tw_common.skc_rcv_saddr
int tw_timeout;
volatile unsigned char tw_substate;
- /* 3 bits hole, try to pack */
unsigned char tw_rcv_wscale;
+
/* Socket demultiplex comparisons on incoming packets. */
- /* these five are in inet_sock */
+ /* these three are in inet_sock */
__be16 tw_sport;
- __be32 tw_daddr __attribute__((aligned(INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES)));
- __be32 tw_rcv_saddr;
__be16 tw_dport;
__u16 tw_num;
kmemcheck_bitfield_begin(flags);
@@ -191,10 +185,10 @@ static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk)
return (struct inet_timewait_sock *)sk;
}
-static inline __be32 inet_rcv_saddr(const struct sock *sk)
+static inline __be32 sk_rcv_saddr(const struct sock *sk)
{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- inet_sk(sk)->inet_rcv_saddr : inet_twsk(sk)->tw_rcv_saddr;
+/* both inet_sk() and inet_twsk() store rcv_saddr in skc_rcv_saddr */
+ return sk->__sk_common.skc_rcv_saddr;
}
extern void inet_twsk_put(struct inet_timewait_sock *tw);
diff --git a/include/net/sock.h b/include/net/sock.h
index 3482004e5c2..82e86034702 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -105,10 +105,8 @@ struct net;
/**
* struct sock_common - minimal network layer representation of sockets
- * @skc_node: main hash linkage for various protocol lookup tables
- * @skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
- * @skc_refcnt: reference count
- * @skc_tx_queue_mapping: tx queue number for this connection
+ * @skc_daddr: Foreign IPv4 addr
+ * @skc_rcv_saddr: Bound local IPv4 addr
* @skc_hash: hash value used with various protocol lookup tables
* @skc_u16hashes: two u16 hash values used by UDP lookup tables
* @skc_family: network address family
@@ -119,20 +117,20 @@ struct net;
* @skc_portaddr_node: second hash linkage for UDP/UDP-Lite protocol
* @skc_prot: protocol handlers inside a network family
* @skc_net: reference to the network namespace of this socket
+ * @skc_node: main hash linkage for various protocol lookup tables
+ * @skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
+ * @skc_tx_queue_mapping: tx queue number for this connection
+ * @skc_refcnt: reference count
*
* This is the minimal network layer representation of sockets, the header
* for struct sock and struct inet_timewait_sock.
*/
struct sock_common {
- /*
- * first fields are not copied in sock_copy()
+ /* skc_daddr and skc_rcv_saddr must be grouped :
+ * cf INET_MATCH() and INET_TW_MATCH()
*/
- union {
- struct hlist_node skc_node;
- struct hlist_nulls_node skc_nulls_node;
- };
- atomic_t skc_refcnt;
- int skc_tx_queue_mapping;
+ __be32 skc_daddr;
+ __be32 skc_rcv_saddr;
union {
unsigned int skc_hash;
@@ -150,6 +148,18 @@ struct sock_common {
#ifdef CONFIG_NET_NS
struct net *skc_net;
#endif
+ /*
+ * fields between dontcopy_begin/dontcopy_end
+ * are not copied in sock_copy()
+ */
+ int skc_dontcopy_begin[0];
+ union {
+ struct hlist_node skc_node;
+ struct hlist_nulls_node skc_nulls_node;
+ };
+ int skc_tx_queue_mapping;
+ atomic_t skc_refcnt;
+ int skc_dontcopy_end[0];
};
/**
@@ -232,7 +242,8 @@ struct sock {
#define sk_refcnt __sk_common.skc_refcnt
#define sk_tx_queue_mapping __sk_common.skc_tx_queue_mapping
-#define sk_copy_start __sk_common.skc_hash
+#define sk_dontcopy_begin __sk_common.skc_dontcopy_begin
+#define sk_dontcopy_end __sk_common.skc_dontcopy_end
#define sk_hash __sk_common.skc_hash
#define sk_family __sk_common.skc_family
#define sk_state __sk_common.skc_state
diff --git a/net/core/sock.c b/net/core/sock.c
index fb608011146..bcdb6ff6e62 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -992,17 +992,18 @@ static inline void sock_lock_init(struct sock *sk)
/*
* Copy all fields from osk to nsk but nsk->sk_refcnt must not change yet,
* even temporarly, because of RCU lookups. sk_node should also be left as is.
+ * We must not copy fields between sk_dontcopy_begin and sk_dontcopy_end
*/
static void sock_copy(struct sock *nsk, const struct sock *osk)
{
#ifdef CONFIG_SECURITY_NETWORK
void *sptr = nsk->sk_security;
#endif
- BUILD_BUG_ON(offsetof(struct sock, sk_copy_start) !=
- sizeof(osk->sk_node) + sizeof(osk->sk_refcnt) +
- sizeof(osk->sk_tx_queue_mapping));
- memcpy(&nsk->sk_copy_start, &osk->sk_copy_start,
- osk->sk_prot->obj_size - offsetof(struct sock, sk_copy_start));
+ memcpy(nsk, osk, offsetof(struct sock, sk_dontcopy_begin));
+
+ memcpy(&nsk->sk_dontcopy_end, &osk->sk_dontcopy_end,
+ osk->sk_prot->obj_size - offsetof(struct sock, sk_dontcopy_end));
+
#ifdef CONFIG_SECURITY_NETWORK
nsk->sk_security = sptr;
security_sk_clone(osk, nsk);
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 06f5f8f482f..25e318153f1 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -55,7 +55,6 @@ EXPORT_SYMBOL(inet_get_local_port_range);
int inet_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb)
{
- const __be32 sk_rcv_saddr = inet_rcv_saddr(sk);
struct sock *sk2;
struct hlist_node *node;
int reuse = sk->sk_reuse;
@@ -75,9 +74,9 @@ int inet_csk_bind_conflict(const struct sock *sk,
sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
if (!reuse || !sk2->sk_reuse ||
sk2->sk_state == TCP_LISTEN) {
- const __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
- if (!sk2_rcv_saddr || !sk_rcv_saddr ||
- sk2_rcv_saddr == sk_rcv_saddr)
+ const __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2);
+ if (!sk2_rcv_saddr || !sk_rcv_saddr(sk) ||
+ sk2_rcv_saddr == sk_rcv_saddr(sk))
break;
}
}
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index b541a4e009f..7aad1277086 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -54,8 +54,8 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
{
const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
- __be32 sk1_rcv_saddr = inet_sk(sk)->inet_rcv_saddr;
- __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
+ __be32 sk1_rcv_saddr = sk_rcv_saddr(sk);
+ __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2);
int sk_ipv6only = ipv6_only_sock(sk);
int sk2_ipv6only = inet_v6_ipv6only(sk2);
int addr_type = ipv6_addr_type(sk_rcv_saddr6);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 19:23:09 +0000