mirror of
https://github.com/torvalds/linux
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60c778b259
I was notified by Randy Stewart that lksctp claims to be "the reference implementation". First of all, "the refrence implementation" was the original implementation of SCTP in usersapce written ty Randy and a few others. Second, after looking at the definiton of 'reference implementation', we don't really meet the requirements. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
147 lines
4 KiB
C
147 lines
4 KiB
C
/* SCTP kernel 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 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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* This SCTP 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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* This SCTP 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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