tcp: kill eff_sacks "cache", the sole user can calculate itself

[safe/jmp/linux-2.6] / include / net / sock.h

diff --git a/include/net/sock.h b/include/net/sock.h
index ce3b5b6..4bb1ff9 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -158,7 +158,7 @@ struct sock_common {
   *    @sk_allocation: allocation mode
   *    @sk_sndbuf: size of send buffer in bytes
   *    @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
-  *               %SO_OOBINLINE settings
+  *               %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
   *    @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)
@@ -488,6 +488,13 @@ enum sock_flags {
        SOCK_RCVTSTAMPNS, /* %SO_TIMESTAMPNS setting */
        SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
        SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
+       SOCK_TIMESTAMPING_TX_HARDWARE,  /* %SOF_TIMESTAMPING_TX_HARDWARE */
+       SOCK_TIMESTAMPING_TX_SOFTWARE,  /* %SOF_TIMESTAMPING_TX_SOFTWARE */
+       SOCK_TIMESTAMPING_RX_HARDWARE,  /* %SOF_TIMESTAMPING_RX_HARDWARE */
+       SOCK_TIMESTAMPING_RX_SOFTWARE,  /* %SOF_TIMESTAMPING_RX_SOFTWARE */
+       SOCK_TIMESTAMPING_SOFTWARE,     /* %SOF_TIMESTAMPING_SOFTWARE */
+       SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */
+       SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */
 };
 
 static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
@@ -860,7 +867,6 @@ static inline void sk_mem_uncharge(struct sock *sk, int size)
 
 static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
 {
-       skb_truesize_check(skb);
        sock_set_flag(sk, SOCK_QUEUE_SHRUNK);
        sk->sk_wmem_queued -= skb->truesize;
        sk_mem_uncharge(sk, skb->truesize);
@@ -945,6 +951,11 @@ extern struct sk_buff              *sock_alloc_send_skb(struct sock *sk,
                                                     unsigned long size,
                                                     int noblock,
                                                     int *errcode);
+extern struct sk_buff          *sock_alloc_send_pskb(struct sock *sk,
+                                                     unsigned long header_len,
+                                                     unsigned long data_len,
+                                                     int noblock,
+                                                     int *errcode);
 extern void *sock_kmalloc(struct sock *sk, int size,
                          gfp_t priority);
 extern void sock_kfree_s(struct sock *sk, void *mem, int size);
@@ -1341,14 +1352,45 @@ static __inline__ void
 sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
 {
        ktime_t kt = skb->tstamp;
+       struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
 
-       if (sock_flag(sk, SOCK_RCVTSTAMP))
+       /*
+        * generate control messages if
+        * - receive time stamping in software requested (SOCK_RCVTSTAMP
+        *   or SOCK_TIMESTAMPING_RX_SOFTWARE)
+        * - software time stamp available and wanted
+        *   (SOCK_TIMESTAMPING_SOFTWARE)
+        * - hardware time stamps available and wanted
+        *   (SOCK_TIMESTAMPING_SYS_HARDWARE or
+        *   SOCK_TIMESTAMPING_RAW_HARDWARE)
+        */
+       if (sock_flag(sk, SOCK_RCVTSTAMP) ||
+           sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
+           (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) ||
+           (hwtstamps->hwtstamp.tv64 &&
+            sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) ||
+           (hwtstamps->syststamp.tv64 &&
+            sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)))
                __sock_recv_timestamp(msg, sk, skb);
        else
                sk->sk_stamp = kt;
 }
 
 /**
+ * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
+ * @msg:       outgoing packet
+ * @sk:                socket sending this packet
+ * @shtx:      filled with instructions for time stamping
+ *
+ * Currently only depends on SOCK_TIMESTAMPING* flags. Returns error code if
+ * parameters are invalid.
+ */
+extern int sock_tx_timestamp(struct msghdr *msg,
+                            struct sock *sk,
+                            union skb_shared_tx *shtx);
+
+
+/**
  * sk_eat_skb - Release a skb if it is no longer needed
  * @sk: socket to eat this skb from
  * @skb: socket buffer to eat
@@ -1416,7 +1458,7 @@ static inline struct sock *skb_steal_sock(struct sk_buff *skb)
        return NULL;
 }
 
-extern void sock_enable_timestamp(struct sock *sk);
+extern void sock_enable_timestamp(struct sock *sk, int flag);
 extern int sock_get_timestamp(struct sock *, struct timeval __user *);
 extern int sock_get_timestampns(struct sock *, struct timespec __user *);