text: /* SCTP kernel reference Implementation
   * Copyright (c) 2001 International Business Machines Corp.
   * 
   * 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(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(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);
  }
  
  
  