patch-2.4.23 linux-2.4.23/include/net/sctp/compat.h

• Lines: 103
• Date: 2003-11-28 10:26:21.000000000 -0800
• Orig file: linux-2.4.22/include/net/sctp/compat.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.22/include/net/sctp/compat.h linux-2.4.23/include/net/sctp/compat.h
@@ -0,0 +1,102 @@
+/* SCTP kernel reference Implementation
+ *
+ * Copyright (c) 2003 Hewlett-Packard Company
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * This header represents the structures and constants needed to backport
+ * lksctp from Linux kernel 2.5 to 2.4 This file also has some code that
+ * has been taken from the source base of Linux kernel 2.5 
+ * 
+ * The SCTP reference implementation 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; either version 2, or (at your option)
+ * any later version.
+ * 
+ * The SCTP reference implementation is distributed in the hope that it 
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ *                 ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.  
+ * 
+ */
+
+#ifndef __net_sctp_compat_h__
+#define __net_sctp_compat_h__
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/seq_file.h>
+
+/*
+ * The following defines are for compatibility with 2.5
+ */
+/*
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr:	the pointer to the member.
+ * @type:	the type of the container struct this is embedded in.
+ * @member:	the name of the member within the struct.
+ */
+#define container_of(ptr, type, member) ({			\
+	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
+#define DEFINE_SNMP_STAT(type, name)	\
+	type name[NR_CPUS * 2]
+#define DECLARE_SNMP_STAT(type, name)	\
+	extern type name[]
+#define SNMP_DEC_STATS(mib, field) ((mib)[2*smp_processor_id()+!in_softirq()].field--)
+
+#define sctp_sk(__sk) (&(((struct sock *)__sk)->tp_pinfo.af_sctp))
+#define inet_sk(__sk) (&(((struct sock *)__sk)->protinfo.af_inet))
+#define inet6_sk(__sk) (&(((struct sock *)__sk)->net_pinfo.af_inet6))
+
+#define virt_addr_valid(x)	VALID_PAGE(virt_to_page((x)))
+#define sock_owned_by_user(sk)  ((sk)->lock.users)
+#define sk_set_owner(x, y)
+#define __unsafe(x) MOD_INC_USE_COUNT
+#define dst_pmtu(x) ((x)->pmtu)
+
+void sctp_hash_digest(const char *key, const int in_key_len,
+		      const char *text, const int text_len,
+		      __u8 *digest);
+/*
+ * find last bit set.
+ */
+static __inline__ int fls(int x)
+{
+	int r = 32;
+	
+	if (!x)
+		return 0;
+	if (!(x & 0xffff0000u)) {
+		x <<= 16;
+		r -= 16;
+	}
+	if (!(x & 0xff000000u)) {
+		x <<= 8;
+		r -= 8;
+	}
+	if (!(x & 0xf0000000u)) {
+		x <<= 4;
+		r -= 4;
+	}
+	if (!(x & 0xc0000000u)) {
+		x <<= 2;
+		r -= 2;
+	}
+	if (!(x & 0x80000000u)) {
+		x <<= 1;
+		r -= 1;
+	}
+	return r;
+}
+
+#endif /* __net_sctp_compat_h__ */