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/* 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);
}