Merge us.ibm.com:/home/sridhar/BK/linux-2.5.62

into us.ibm.com:/home/sridhar/BK/lksctp-2.5.62

1 files changed, 128 insertions, 0 deletions

diff --git a/net/sctp/proc.c b/net/sctp/proc.c
new file mode 100644
index 000000000000..9c7d9e489b22
--- /dev/null
+++ b/net/sctp/proc.c
@@ -0,0 +1,128 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 2003 International Business Machines, Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * 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.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ *    lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ *    http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ *    Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#include <linux/types.h>
+#include <linux/seq_file.h>
+#include <net/sctp/sctp.h>
+
+static char *sctp_snmp_list[] = {
+#define SCTP_SNMP_ENTRY(x) #x 
+	SCTP_SNMP_ENTRY(SctpCurrEstab),
+	SCTP_SNMP_ENTRY(SctpActiveEstabs),
+	SCTP_SNMP_ENTRY(SctpPassiveEstabs),
+	SCTP_SNMP_ENTRY(SctpAborteds),
+	SCTP_SNMP_ENTRY(SctpShutdowns),
+	SCTP_SNMP_ENTRY(SctpOutOfBlues),
+	SCTP_SNMP_ENTRY(SctpChecksumErrors),
+	SCTP_SNMP_ENTRY(SctpOutCtrlChunks),
+	SCTP_SNMP_ENTRY(SctpOutOrderChunks),
+	SCTP_SNMP_ENTRY(SctpOutUnorderChunks),
+	SCTP_SNMP_ENTRY(SctpInCtrlChunks),
+	SCTP_SNMP_ENTRY(SctpInOrderChunks),
+	SCTP_SNMP_ENTRY(SctpInUnorderChunks),
+	SCTP_SNMP_ENTRY(SctpFragUsrMsgs),
+	SCTP_SNMP_ENTRY(SctpReasmUsrMsgs),
+	SCTP_SNMP_ENTRY(SctpOutSCTPPacks),
+	SCTP_SNMP_ENTRY(SctpInSCTPPacks),
+#undef SCTP_SNMP_ENTRY
+};
+
+/* Return the current value of a particular entry in the mib by adding its
+ * per cpu counters.
+ */ 
+static unsigned long
+fold_field(void *mib[], int nr)
+{
+	unsigned long res = 0;
+	int i;
+
+	for (i = 0; i < NR_CPUS; i++) {
+		if (!cpu_possible(i))
+			continue;
+		res +=
+		    *((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
+					 sizeof (unsigned long) * nr));
+		res +=
+		    *((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) +
+					 sizeof (unsigned long) * nr));
+	}
+	return res;
+}
+
+/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
+static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
+{
+	int i;
+
+	for (i = 0; i < sizeof(sctp_snmp_list) / sizeof(char *); i++)
+		seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i],
+			   fold_field((void **)sctp_statistics, i));
+
+	return 0;
+}
+
+/* Initialize the seq file operations for 'snmp' object. */
+static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, sctp_snmp_seq_show, NULL);
+}
+
+static struct file_operations sctp_snmp_seq_fops = {
+	.open	 = sctp_snmp_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = single_release,
+};
+
+/* Set up the proc fs entry for 'snmp' object. */
+int __init sctp_snmp_proc_init(void)
+{
+	struct proc_dir_entry *p;
+
+	p = create_proc_entry("snmp", S_IRUGO, proc_net_sctp);
+	if (!p)
+		return -ENOMEM;
+
+	p->proc_fops = &sctp_snmp_seq_fops;
+
+	return 0;
+}
+
+/* Cleanup the proc fs entry for 'snmp' object. */
+void sctp_snmp_proc_exit(void)
+{
+	remove_proc_entry("snmp", proc_net_sctp);
+}