1 files changed, 140 insertions, 0 deletions

diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c
new file mode 100644
index 000000000000..0781e5d509fd
--- /dev/null
+++ b/net/sctp/objcnt.c
@@ -0,0 +1,140 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * Support for memory object debugging.  This allows one to monitor the
+ * object allocations/deallocations for types instrumented for this 
+ * via the proc fs. 
+ * 
+ * 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: 
+ *    Jon Grimm             <jgrimm@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/kernel.h>
+#include <net/sctp/sctp.h>
+
+/*
+ * Global counters to count raw object allocation counts.
+ * To add new counters, choose a unique suffix for the variable
+ * name as the helper macros key off this suffix to make
+ * life easier for the programmer.
+ */
+
+SCTP_DBG_OBJCNT(sock);
+SCTP_DBG_OBJCNT(ep);
+SCTP_DBG_OBJCNT(transport);
+SCTP_DBG_OBJCNT(assoc);
+SCTP_DBG_OBJCNT(bind_addr);
+SCTP_DBG_OBJCNT(bind_bucket);
+SCTP_DBG_OBJCNT(chunk);
+SCTP_DBG_OBJCNT(addr);
+SCTP_DBG_OBJCNT(ssnmap);
+SCTP_DBG_OBJCNT(datamsg);
+
+/* An array to make it easy to pretty print the debug information
+ * to the proc fs.
+ */
+static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
+        SCTP_DBG_OBJCNT_ENTRY(sock),
+        SCTP_DBG_OBJCNT_ENTRY(ep),
+        SCTP_DBG_OBJCNT_ENTRY(assoc),
+        SCTP_DBG_OBJCNT_ENTRY(transport),
+        SCTP_DBG_OBJCNT_ENTRY(chunk),
+        SCTP_DBG_OBJCNT_ENTRY(bind_addr),
+        SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
+        SCTP_DBG_OBJCNT_ENTRY(addr),
+        SCTP_DBG_OBJCNT_ENTRY(ssnmap),
+        SCTP_DBG_OBJCNT_ENTRY(datamsg),
+};
+
+/* Callback from procfs to read out objcount information.
+ * Walk through the entries in the sctp_dbg_objcnt array, dumping
+ * the raw object counts for each monitored type.
+ *
+ * This code was modified from similar code in route.c
+ */
+static int sctp_dbg_objcnt_read(char *buffer, char **start, off_t offset,
+                                int length, int *eof, void *data)
+{
+        int len = 0;
+        off_t pos = 0;
+        int entries;
+        int i;
+        char temp[128];
+
+        /* How many entries? */
+        entries = ARRAY_SIZE(sctp_dbg_objcnt);
+
+        /* Walk the entries and print out the debug information
+         * for proc fs.
+         */
+        for (i = 0; i < entries; i++) {
+                pos += 128;
+
+                /* Skip ahead. */
+                if (pos <= offset) {
+                        len = 0;
+                        continue;
+                }
+                /* Print out each entry. */
+                sprintf(temp, "%s: %d",
+                        sctp_dbg_objcnt[i].label,
+                        atomic_read(sctp_dbg_objcnt[i].counter));
+
+                sprintf(buffer + len, "%-127s\n", temp);
+                len += 128;
+                if (pos >= offset+length)
+                        goto done;
+        }
+
+done:
+        *start = buffer + len - (pos - offset);
+        len = pos - offset;
+        if (len > length)
+                len = length;
+
+        return len;
+}
+
+/* Initialize the objcount in the proc filesystem.  */
+void sctp_dbg_objcnt_init(void)
+{
+        create_proc_read_entry("sctp_dbg_objcnt", 0, proc_net_sctp,
+                               sctp_dbg_objcnt_read, NULL);
+}
+
+/* Cleanup the objcount entry in the proc filesystem.  */
+void sctp_dbg_objcnt_exit(void)
+{
+        remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp);
+}
+
+