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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* SCTP kernel reference Implementation
2 * (C) Copyright IBM Corp. 2001, 2004
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +09003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * This file is part of the SCTP kernel reference Implementation
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +09005 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Support for memory object debugging. This allows one to monitor the
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +09007 * object allocations/deallocations for types instrumented for this
8 * via the proc fs.
9 *
10 * The SCTP reference implementation is free software;
11 * you can redistribute it and/or modify it under the terms of
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 * the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090015 *
16 * The SCTP reference implementation is distributed in the hope that it
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
18 * ************************
19 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
20 * See the GNU General Public License for more details.
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090021 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 * You should have received a copy of the GNU General Public License
23 * along with GNU CC; see the file COPYING. If not, write to
24 * the Free Software Foundation, 59 Temple Place - Suite 330,
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090025 * Boston, MA 02111-1307, USA.
26 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 * Please send any bug reports or fixes you make to the
28 * email address(es):
29 * lksctp developers <lksctp-developers@lists.sourceforge.net>
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090030 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 * Or submit a bug report through the following website:
32 * http://www.sf.net/projects/lksctp
33 *
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090034 * Written or modified by:
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 * Jon Grimm <jgrimm@us.ibm.com>
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090036 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * Any bugs reported given to us we will try to fix... any fixes shared will
38 * be incorporated into the next SCTP release.
39 */
40
41#include <linux/kernel.h>
42#include <net/sctp/sctp.h>
43
44/*
45 * Global counters to count raw object allocation counts.
46 * To add new counters, choose a unique suffix for the variable
47 * name as the helper macros key off this suffix to make
48 * life easier for the programmer.
49 */
50
51SCTP_DBG_OBJCNT(sock);
52SCTP_DBG_OBJCNT(ep);
53SCTP_DBG_OBJCNT(transport);
54SCTP_DBG_OBJCNT(assoc);
55SCTP_DBG_OBJCNT(bind_addr);
56SCTP_DBG_OBJCNT(bind_bucket);
57SCTP_DBG_OBJCNT(chunk);
58SCTP_DBG_OBJCNT(addr);
59SCTP_DBG_OBJCNT(ssnmap);
60SCTP_DBG_OBJCNT(datamsg);
Vlad Yasevich1f485642007-10-09 01:15:59 -070061SCTP_DBG_OBJCNT(keys);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63/* An array to make it easy to pretty print the debug information
64 * to the proc fs.
65 */
66static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
67 SCTP_DBG_OBJCNT_ENTRY(sock),
68 SCTP_DBG_OBJCNT_ENTRY(ep),
69 SCTP_DBG_OBJCNT_ENTRY(assoc),
70 SCTP_DBG_OBJCNT_ENTRY(transport),
71 SCTP_DBG_OBJCNT_ENTRY(chunk),
72 SCTP_DBG_OBJCNT_ENTRY(bind_addr),
73 SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
74 SCTP_DBG_OBJCNT_ENTRY(addr),
75 SCTP_DBG_OBJCNT_ENTRY(ssnmap),
76 SCTP_DBG_OBJCNT_ENTRY(datamsg),
Vlad Yasevich1f485642007-10-09 01:15:59 -070077 SCTP_DBG_OBJCNT_ENTRY(keys),
Linus Torvalds1da177e2005-04-16 15:20:36 -070078};
79
80/* Callback from procfs to read out objcount information.
81 * Walk through the entries in the sctp_dbg_objcnt array, dumping
82 * the raw object counts for each monitored type.
83 *
84 * This code was modified from similar code in route.c
85 */
86static int sctp_dbg_objcnt_read(char *buffer, char **start, off_t offset,
87 int length, int *eof, void *data)
88{
89 int len = 0;
90 off_t pos = 0;
91 int entries;
92 int i;
93 char temp[128];
94
95 /* How many entries? */
96 entries = ARRAY_SIZE(sctp_dbg_objcnt);
97
98 /* Walk the entries and print out the debug information
99 * for proc fs.
100 */
101 for (i = 0; i < entries; i++) {
102 pos += 128;
103
104 /* Skip ahead. */
105 if (pos <= offset) {
106 len = 0;
107 continue;
108 }
109 /* Print out each entry. */
110 sprintf(temp, "%s: %d",
111 sctp_dbg_objcnt[i].label,
112 atomic_read(sctp_dbg_objcnt[i].counter));
113
114 sprintf(buffer + len, "%-127s\n", temp);
115 len += 128;
116 if (pos >= offset+length)
117 goto done;
118 }
119
120done:
121 *start = buffer + len - (pos - offset);
122 len = pos - offset;
123 if (len > length)
124 len = length;
125
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900126 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127}
128
129/* Initialize the objcount in the proc filesystem. */
130void sctp_dbg_objcnt_init(void)
131{
Christophe Lucasee71a292005-07-18 13:38:07 -0700132 struct proc_dir_entry *ent;
133 ent = create_proc_read_entry("sctp_dbg_objcnt", 0, proc_net_sctp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 sctp_dbg_objcnt_read, NULL);
Christophe Lucasee71a292005-07-18 13:38:07 -0700135 if (!ent)
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900136 printk(KERN_WARNING
Christophe Lucasee71a292005-07-18 13:38:07 -0700137 "sctp_dbg_objcnt: Unable to create /proc entry.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138}
139
140/* Cleanup the objcount entry in the proc filesystem. */
141void sctp_dbg_objcnt_exit(void)
142{
143 remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp);
144}
145
146