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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.

 */

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_objcount", proc_net_sctp);

}