147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
/* SCTP kernel reference Implementation
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* (C) Copyright IBM Corp. 2001, 2004
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*
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* This file is part of the SCTP kernel reference Implementation
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*
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* Support for memory object debugging. This allows one to monitor the
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* object allocations/deallocations for types instrumented for this
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* via the proc fs.
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*
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* The SCTP reference implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* The SCTP reference implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Jon Grimm <jgrimm@us.ibm.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#include <linux/kernel.h>
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#include <net/sctp/sctp.h>
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/*
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* Global counters to count raw object allocation counts.
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* To add new counters, choose a unique suffix for the variable
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* name as the helper macros key off this suffix to make
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* life easier for the programmer.
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*/
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SCTP_DBG_OBJCNT(sock);
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SCTP_DBG_OBJCNT(ep);
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SCTP_DBG_OBJCNT(transport);
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SCTP_DBG_OBJCNT(assoc);
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SCTP_DBG_OBJCNT(bind_addr);
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SCTP_DBG_OBJCNT(bind_bucket);
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SCTP_DBG_OBJCNT(chunk);
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SCTP_DBG_OBJCNT(addr);
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SCTP_DBG_OBJCNT(ssnmap);
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SCTP_DBG_OBJCNT(datamsg);
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SCTP_DBG_OBJCNT(keys);
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/* An array to make it easy to pretty print the debug information
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* to the proc fs.
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*/
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static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
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SCTP_DBG_OBJCNT_ENTRY(sock),
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SCTP_DBG_OBJCNT_ENTRY(ep),
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SCTP_DBG_OBJCNT_ENTRY(assoc),
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SCTP_DBG_OBJCNT_ENTRY(transport),
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SCTP_DBG_OBJCNT_ENTRY(chunk),
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SCTP_DBG_OBJCNT_ENTRY(bind_addr),
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SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
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SCTP_DBG_OBJCNT_ENTRY(addr),
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SCTP_DBG_OBJCNT_ENTRY(ssnmap),
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SCTP_DBG_OBJCNT_ENTRY(datamsg),
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SCTP_DBG_OBJCNT_ENTRY(keys),
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};
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/* Callback from procfs to read out objcount information.
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* Walk through the entries in the sctp_dbg_objcnt array, dumping
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* the raw object counts for each monitored type.
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*
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* This code was modified from similar code in route.c
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*/
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static int sctp_dbg_objcnt_read(char *buffer, char **start, off_t offset,
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int length, int *eof, void *data)
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{
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int len = 0;
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off_t pos = 0;
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int entries;
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int i;
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char temp[128];
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/* How many entries? */
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entries = ARRAY_SIZE(sctp_dbg_objcnt);
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/* Walk the entries and print out the debug information
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* for proc fs.
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*/
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for (i = 0; i < entries; i++) {
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pos += 128;
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/* Skip ahead. */
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if (pos <= offset) {
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len = 0;
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continue;
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}
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/* Print out each entry. */
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sprintf(temp, "%s: %d",
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sctp_dbg_objcnt[i].label,
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atomic_read(sctp_dbg_objcnt[i].counter));
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sprintf(buffer + len, "%-127s\n", temp);
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len += 128;
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if (pos >= offset+length)
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goto done;
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}
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done:
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*start = buffer + len - (pos - offset);
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len = pos - offset;
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if (len > length)
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len = length;
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return len;
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}
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/* Initialize the objcount in the proc filesystem. */
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void sctp_dbg_objcnt_init(void)
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{
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struct proc_dir_entry *ent;
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ent = create_proc_read_entry("sctp_dbg_objcnt", 0, proc_net_sctp,
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sctp_dbg_objcnt_read, NULL);
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if (!ent)
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printk(KERN_WARNING
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"sctp_dbg_objcnt: Unable to create /proc entry.\n");
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}
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/* Cleanup the objcount entry in the proc filesystem. */
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void sctp_dbg_objcnt_exit(void)
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{
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remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp);
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}
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