X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=net%2Fipv4%2Ftcp.c;h=e2b7b80550371dd836d3b32635c999b2a46f6fcc;hb=42f142371e48fbc44956d57b4e506bb6ce673cd7;hp=4b0272c92d665a3b8b1caef5e4ed7d2526e06bb4;hpb=2e6e33bab6e1996a5dec9108fb467b52b841e7a8;p=powerpc.git

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 4b0272c92d..e2b7b80550 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -257,6 +257,7 @@
 #include <linux/fs.h>
 #include <linux/random.h>
 #include <linux/bootmem.h>
+#include <linux/cache.h>
 
 #include <net/icmp.h>
 #include <net/tcp.h>
@@ -275,9 +276,9 @@ atomic_t tcp_orphan_count = ATOMIC_INIT(0);
 
 EXPORT_SYMBOL_GPL(tcp_orphan_count);
 
-int sysctl_tcp_mem[3];
-int sysctl_tcp_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
-int sysctl_tcp_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
+int sysctl_tcp_mem[3] __read_mostly;
+int sysctl_tcp_wmem[3] __read_mostly;
+int sysctl_tcp_rmem[3] __read_mostly;
 
 EXPORT_SYMBOL(sysctl_tcp_mem);
 EXPORT_SYMBOL(sysctl_tcp_rmem);
@@ -365,7 +366,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
 	if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == TCP_CLOSE)
 		mask |= POLLHUP;
 	if (sk->sk_shutdown & RCV_SHUTDOWN)
-		mask |= POLLIN | POLLRDNORM;
+		mask |= POLLIN | POLLRDNORM | POLLRDHUP;
 
 	/* Connected? */
 	if ((1 << sk->sk_state) & ~(TCPF_SYN_SENT | TCPF_SYN_RECV)) {
@@ -1467,6 +1468,7 @@ void tcp_close(struct sock *sk, long timeout)
 {
 	struct sk_buff *skb;
 	int data_was_unread = 0;
+	int state;
 
 	lock_sock(sk);
 	sk->sk_shutdown = SHUTDOWN_MASK;
@@ -1543,6 +1545,11 @@ void tcp_close(struct sock *sk, long timeout)
 	sk_stream_wait_close(sk, timeout);
 
 adjudge_to_death:
+	state = sk->sk_state;
+	sock_hold(sk);
+	sock_orphan(sk);
+	atomic_inc(sk->sk_prot->orphan_count);
+
 	/* It is the last release_sock in its life. It will remove backlog. */
 	release_sock(sk);
 
@@ -1554,8 +1561,9 @@ adjudge_to_death:
 	bh_lock_sock(sk);
 	BUG_TRAP(!sock_owned_by_user(sk));
 
-	sock_hold(sk);
-	sock_orphan(sk);
+	/* Have we already been destroyed by a softirq or backlog? */
+	if (state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
+		goto out;
 
 	/*	This is a (useful) BSD violating of the RFC. There is a
 	 *	problem with TCP as specified in that the other end could
@@ -1583,7 +1591,6 @@ adjudge_to_death:
 			if (tmo > TCP_TIMEWAIT_LEN) {
 				inet_csk_reset_keepalive_timer(sk, tcp_fin_time(sk));
 			} else {
-				atomic_inc(sk->sk_prot->orphan_count);
 				tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
 				goto out;
 			}
@@ -1602,7 +1609,6 @@ adjudge_to_death:
 			NET_INC_STATS_BH(LINUX_MIB_TCPABORTONMEMORY);
 		}
 	}
-	atomic_inc(sk->sk_prot->orphan_count);
 
 	if (sk->sk_state == TCP_CLOSE)
 		inet_csk_destroy_sock(sk);
@@ -2081,7 +2087,8 @@ __setup("thash_entries=", set_thash_entries);
 void __init tcp_init(void)
 {
 	struct sk_buff *skb = NULL;
-	int order, i;
+	unsigned long limit;
+	int order, i, max_share;
 
 	if (sizeof(struct tcp_skb_cb) > sizeof(skb->cb))
 		__skb_cb_too_small_for_tcp(sizeof(struct tcp_skb_cb),
@@ -2155,12 +2162,16 @@ void __init tcp_init(void)
 	sysctl_tcp_mem[1] = 1024 << order;
 	sysctl_tcp_mem[2] = 1536 << order;
 
-	if (order < 3) {
-		sysctl_tcp_wmem[2] = 64 * 1024;
-		sysctl_tcp_rmem[0] = PAGE_SIZE;
-		sysctl_tcp_rmem[1] = 43689;
-		sysctl_tcp_rmem[2] = 2 * 43689;
-	}
+	limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7);
+	max_share = min(4UL*1024*1024, limit);
+
+	sysctl_tcp_wmem[0] = SK_STREAM_MEM_QUANTUM;
+	sysctl_tcp_wmem[1] = 16*1024;
+	sysctl_tcp_wmem[2] = max(64*1024, max_share);
+
+	sysctl_tcp_rmem[0] = SK_STREAM_MEM_QUANTUM;
+	sysctl_tcp_rmem[1] = 87380;
+	sysctl_tcp_rmem[2] = max(87380, max_share);
 
 	printk(KERN_INFO "TCP: Hash tables configured "
 	       "(established %d bind %d)\n",