[ipv4] move proc init to newly created net/ipv4/ip_proc.c

This is the start of the seq_file work, so that I can see if anybody
will cough too much on the choosen path...

Also convert some unneeded __constat_htons to plain htons, that results
in the same code being generated.

include/net/ip.h

@@ -174,7 +174,7 @@ static inline
 int ip_decrease_ttl(struct iphdr *iph)
 {
 	u32 check = iph->check;
-	check += __constant_htons(0x0100);
+	check += htons(0x0100);
 	iph->check = check + (check>=0xFFFF);
 	return --iph->ttl;
 }
@@ -191,7 +191,7 @@ extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more
 
 static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk)
 {
-	if (iph->frag_off&__constant_htons(IP_DF)) {
+	if (iph->frag_off & htons(IP_DF)) {
 		/* This is only to work around buggy Windows95/2000
 		 * VJ compression implementations.  If the ID field
 		 * does not change, they drop every other packet in
@@ -205,7 +205,7 @@ static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, str
 
 static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more)
 {
-	if (iph->frag_off&__constant_htons(IP_DF)) {
+	if (iph->frag_off & htons(IP_DF)) {
 		if (sk && inet_sk(sk)->daddr) {
 			iph->id = htons(inet_sk(sk)->id);
 			inet_sk(sk)->id += 1 + more;
@@ -280,4 +280,6 @@ extern void	ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
 extern void	ip_local_error(struct sock *sk, int err, u32 daddr, u16 dport,
 			       u32 info);
 
+extern int ipv4_proc_init(void);
+
 #endif	/* _IP_H */

net/ipv4/Makefile

@@ -4,7 +4,7 @@
 
 obj-y     := utils.o route.o inetpeer.o proc.o protocol.o \
 	     ip_input.o ip_fragment.o ip_forward.o ip_options.o \
-	     ip_output.o ip_sockglue.o \
+	     ip_output.o ip_sockglue.o ip_proc.o \
 	     tcp.o tcp_input.o tcp_output.o tcp_timer.o tcp_ipv4.o tcp_minisocks.o \
 	     tcp_diag.o raw.o udp.o arp.o icmp.o devinet.o af_inet.o igmp.o \
 	     sysctl_net_ipv4.o fib_frontend.o fib_semantics.o fib_hash.o

net/ipv4/af_inet.c

@@ -82,7 +82,6 @@
 #include <linux/fcntl.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
-#include <linux/proc_fs.h>
 #include <linux/stat.h>
 #include <linux/init.h>
 #include <linux/poll.h>
@@ -124,12 +123,6 @@ struct linux_mib net_statistics[NR_CPUS * 2];
 atomic_t inet_sock_nr;
 #endif
 
-extern int raw_get_info(char *, char **, off_t, int);
-extern int snmp_get_info(char *, char **, off_t, int);
-extern int netstat_get_info(char *, char **, off_t, int);
-extern int afinet_get_info(char *, char **, off_t, int);
-extern int tcp_get_info(char *, char **, off_t, int);
-extern int udp_get_info(char *, char **, off_t, int);
 extern void ip_mc_drop_socket(struct sock *sk);
 
 #ifdef CONFIG_DLCI
@@ -1211,17 +1204,8 @@ static int __init inet_init(void)
 	ip_mr_init();
 #endif
 
-	/*
-	 *	Create all the /proc entries.
-	 */
-#ifdef CONFIG_PROC_FS
-	proc_net_create ("raw", 0, raw_get_info);
-	proc_net_create ("netstat", 0, netstat_get_info);
-	proc_net_create ("snmp", 0, snmp_get_info);
-	proc_net_create ("sockstat", 0, afinet_get_info);
-	proc_net_create ("tcp", 0, tcp_get_info);
-	proc_net_create ("udp", 0, udp_get_info);
-#endif		/* CONFIG_PROC_FS */
+	ipv4_proc_init();
 	return 0;
 }
+
 module_init(inet_init);

net/ipv4/ip_proc.c

+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		ipv4 proc support
+ *
+ *		Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2002/10/10
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License as
+ *		published by the Free Software Foundation; version 2 of the
+ *		License
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+extern int raw_get_info(char *, char **, off_t, int);
+extern int snmp_get_info(char *, char **, off_t, int);
+extern int netstat_get_info(char *, char **, off_t, int);
+extern int afinet_get_info(char *, char **, off_t, int);
+extern int tcp_get_info(char *, char **, off_t, int);
+extern int udp_get_info(char *, char **, off_t, int);
+
+#ifdef CONFIG_PROC_FS
+int __init ipv4_proc_init(void)
+{
+	int rc = 0;
+
+	if (!proc_net_create("raw", 0, raw_get_info))
+		goto out_raw;
+
+	if (!proc_net_create("netstat", 0, netstat_get_info))
+		goto out_netstat;
+
+	if (!proc_net_create("snmp", 0, snmp_get_info))
+		goto out_snmp;
+
+	if (!proc_net_create("sockstat", 0, afinet_get_info))
+		goto out_sockstat;
+
+	if (!proc_net_create("tcp", 0, tcp_get_info))
+		goto out_tcp;
+
+	if (!proc_net_create("udp", 0, udp_get_info))
+		goto out_udp;
+out:
+	return rc;
+out_udp:
+	proc_net_remove("tcp");
+out_tcp:
+	proc_net_remove("sockstat");
+out_sockstat:
+	proc_net_remove("snmp");
+out_snmp:
+	proc_net_remove("netstat");
+out_netstat:
+	proc_net_remove("raw");
+out_raw:
+	rc = -ENOMEM;
+	goto out;
+}
+#else /* CONFIG_PROC_FS */
+int __init ipv4_proc_init(void)
+{
+	return 0;
+}
+#endif /* CONFIG_PROC_FS */