1 files changed, 51 insertions, 67 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index fd9876087651..dc42b44c2aa1 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -47,7 +47,6 @@
 #include <linux/module.h>
 #include <linux/lockdep.h>
 #include <linux/netdevice.h>
-#include <linux/pcounter.h>
 #include <linux/skbuff.h>       /* struct sk_buff */
 #include <linux/mm.h>
 #include <linux/security.h>
@@ -70,7 +69,11 @@
 #define SOCK_DEBUG(sk, msg...) do { if ((sk) && sock_flag((sk), SOCK_DBG)) \
                                         printk(KERN_DEBUG msg); } while (0)
 #else
-#define SOCK_DEBUG(sk, msg...) do { } while (0)
+/* Validate arguments and do nothing */
+static void inline int __attribute__ ((format (printf, 2, 3)))
+SOCK_DEBUG(struct sock *sk, const char *msg, ...)
+{
+}
 #endif
 
 /* This is the per-socket lock.  The spinlock provides a synchronization
@@ -122,7 +125,9 @@ struct sock_common {
         atomic_t                skc_refcnt;
         unsigned int            skc_hash;
         struct proto            *skc_prot;
+#ifdef CONFIG_NET_NS
         struct net              *skc_net;
+#endif
 };
 
 /**
@@ -151,6 +156,7 @@ struct sock_common {
   *     @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
   *     @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
   *     @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
+  *     @sk_gso_max_size: Maximum GSO segment size to build
   *     @sk_lingertime: %SO_LINGER l_linger setting
   *     @sk_backlog: always used with the per-socket spinlock held
   *     @sk_callback_lock: used with the callbacks in the end of this struct
@@ -237,6 +243,7 @@ struct sock {
         gfp_t                   sk_allocation;
         int                     sk_route_caps;
         int                     sk_gso_type;
+        unsigned int            sk_gso_max_size;
         int                     sk_rcvlowat;
         unsigned long           sk_flags;
         unsigned long           sk_lingertime;
@@ -498,6 +505,7 @@ extern int sk_wait_data(struct sock *sk, long *timeo);
 struct request_sock_ops;
 struct timewait_sock_ops;
 struct inet_hashinfo;
+struct raw_hashinfo;
 
 /* Networking protocol blocks we attach to sockets.
  * socket layer -> transport layer interface
@@ -553,7 +561,7 @@ struct proto {
 
         /* Keeping track of sockets in use */
 #ifdef CONFIG_PROC_FS
-        struct pcounter         inuse;
+        unsigned int            inuse_idx;
 #endif
 
         /* Memory pressure */
@@ -580,7 +588,11 @@ struct proto {
         struct request_sock_ops *rsk_prot;
         struct timewait_sock_ops *twsk_prot;
 
-        struct inet_hashinfo    *hashinfo;
+        union {
+                struct inet_hashinfo    *hashinfo;
+                struct hlist_head       *udp_hash;
+                struct raw_hashinfo     *raw_hash;
+        } h;
 
         struct module           *owner;
 
@@ -622,36 +634,12 @@ static inline void sk_refcnt_debug_release(const struct sock *sk)
 
 
 #ifdef CONFIG_PROC_FS
-# define DEFINE_PROTO_INUSE(NAME) DEFINE_PCOUNTER(NAME)
-# define REF_PROTO_INUSE(NAME) PCOUNTER_MEMBER_INITIALIZER(NAME, .inuse)
 /* Called with local bh disabled */
-static inline void sock_prot_inuse_add(struct proto *prot, int inc)
-{
-        pcounter_add(&prot->inuse, inc);
-}
-static inline int sock_prot_inuse_init(struct proto *proto)
-{
-        return pcounter_alloc(&proto->inuse);
-}
-static inline int sock_prot_inuse_get(struct proto *proto)
-{
-        return pcounter_getval(&proto->inuse);
-}
-static inline void sock_prot_inuse_free(struct proto *proto)
-{
-        pcounter_free(&proto->inuse);
-}
+extern void sock_prot_inuse_add(struct net *net, struct proto *prot, int inc);
+extern int sock_prot_inuse_get(struct net *net, struct proto *proto);
 #else
-# define DEFINE_PROTO_INUSE(NAME)
-# define REF_PROTO_INUSE(NAME)
-static void inline sock_prot_inuse_add(struct proto *prot, int inc)
-{
-}
-static int inline sock_prot_inuse_init(struct proto *proto)
-{
-        return 0;
-}
-static void inline sock_prot_inuse_free(struct proto *proto)
+static void inline sock_prot_inuse_add(struct net *net, struct proto *prot,
+                int inc)
 {
 }
 #endif
@@ -850,6 +838,7 @@ extern struct sock		*sk_alloc(struct net *net, int family,
                                           gfp_t priority,
                                           struct proto *prot);
 extern void                     sk_free(struct sock *sk);
+extern void                     sk_release_kernel(struct sock *sk);
 extern struct sock              *sk_clone(const struct sock *sk,
                                           const gfp_t priority);
 
@@ -939,41 +928,6 @@ extern void sk_common_release(struct sock *sk);
 extern void sock_init_data(struct socket *sock, struct sock *sk);
 
 /**
- *      sk_filter - run a packet through a socket filter
- *      @sk: sock associated with &sk_buff
- *      @skb: buffer to filter
- *      @needlock: set to 1 if the sock is not locked by caller.
- *
- * Run the filter code and then cut skb->data to correct size returned by
- * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
- * than pkt_len we keep whole skb->data. This is the socket level
- * wrapper to sk_run_filter. It returns 0 if the packet should
- * be accepted or -EPERM if the packet should be tossed.
- *
- */
-
-static inline int sk_filter(struct sock *sk, struct sk_buff *skb)
-{
-        int err;
-        struct sk_filter *filter;
-        
-        err = security_sock_rcv_skb(sk, skb);
-        if (err)
-                return err;
-        
-        rcu_read_lock_bh();
-        filter = rcu_dereference(sk->sk_filter);
-        if (filter) {
-                unsigned int pkt_len = sk_run_filter(skb, filter->insns,
-                                filter->len);
-                err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
-        }
-        rcu_read_unlock_bh();
-
-        return err;
-}
-
-/**
  *      sk_filter_release: Release a socket filter
  *      @sk: socket
  *      @fp: filter to remove
@@ -1333,6 +1287,36 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
 }
 #endif
 
+static inline
+struct net *sock_net(const struct sock *sk)
+{
+#ifdef CONFIG_NET_NS
+        return sk->sk_net;
+#else
+        return &init_net;
+#endif
+}
+
+static inline
+void sock_net_set(struct sock *sk, struct net *net)
+{
+#ifdef CONFIG_NET_NS
+        sk->sk_net = net;
+#endif
+}
+
+/*
+ * Kernel sockets, f.e. rtnl or icmp_socket, are a part of a namespace.
+ * They should not hold a referrence to a namespace in order to allow
+ * to stop it.
+ * Sockets after sk_change_net should be released using sk_release_kernel
+ */
+static inline void sk_change_net(struct sock *sk, struct net *net)
+{
+        put_net(sock_net(sk));
+        sock_net_set(sk, hold_net(net));
+}
+
 extern void sock_enable_timestamp(struct sock *sk);
 extern int sock_get_timestamp(struct sock *, struct timeval __user *);
 extern int sock_get_timestampns(struct sock *, struct timespec __user *);