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Vlad Yasevich60c778b2008-01-11 09:57:09 -05001/* SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * (C) Copyright IBM Corp. 2001, 2004
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +09003 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05004 * This file is part of the SCTP kernel 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 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050010 * This SCTP implementation is free software;
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +090011 * 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 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050016 * This SCTP 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
Joe Perches145ce502010-08-24 13:21:08 +000041#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <net/sctp/sctp.h>
45
46/*
47 * Global counters to count raw object allocation counts.
48 * To add new counters, choose a unique suffix for the variable
49 * name as the helper macros key off this suffix to make
50 * life easier for the programmer.
51 */
52
53SCTP_DBG_OBJCNT(sock);
54SCTP_DBG_OBJCNT(ep);
55SCTP_DBG_OBJCNT(transport);
56SCTP_DBG_OBJCNT(assoc);
57SCTP_DBG_OBJCNT(bind_addr);
58SCTP_DBG_OBJCNT(bind_bucket);
59SCTP_DBG_OBJCNT(chunk);
60SCTP_DBG_OBJCNT(addr);
61SCTP_DBG_OBJCNT(ssnmap);
62SCTP_DBG_OBJCNT(datamsg);
Vlad Yasevich1f485642007-10-09 01:15:59 -070063SCTP_DBG_OBJCNT(keys);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65/* An array to make it easy to pretty print the debug information
66 * to the proc fs.
67 */
68static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
69 SCTP_DBG_OBJCNT_ENTRY(sock),
70 SCTP_DBG_OBJCNT_ENTRY(ep),
71 SCTP_DBG_OBJCNT_ENTRY(assoc),
72 SCTP_DBG_OBJCNT_ENTRY(transport),
73 SCTP_DBG_OBJCNT_ENTRY(chunk),
74 SCTP_DBG_OBJCNT_ENTRY(bind_addr),
75 SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
76 SCTP_DBG_OBJCNT_ENTRY(addr),
77 SCTP_DBG_OBJCNT_ENTRY(ssnmap),
78 SCTP_DBG_OBJCNT_ENTRY(datamsg),
Vlad Yasevich1f485642007-10-09 01:15:59 -070079 SCTP_DBG_OBJCNT_ENTRY(keys),
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82/* Callback from procfs to read out objcount information.
83 * Walk through the entries in the sctp_dbg_objcnt array, dumping
84 * the raw object counts for each monitored type.
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 */
Pavel Emelyanov8ff65b42008-02-09 23:24:58 -080086static int sctp_objcnt_seq_show(struct seq_file *seq, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Pavel Emelyanov5e659e42008-04-24 01:02:16 -070088 int i, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Pavel Emelyanov8ff65b42008-02-09 23:24:58 -080090 i = (int)*(loff_t *)v;
Pavel Emelyanov5e659e42008-04-24 01:02:16 -070091 seq_printf(seq, "%s: %d%n", sctp_dbg_objcnt[i].label,
92 atomic_read(sctp_dbg_objcnt[i].counter), &len);
93 seq_printf(seq, "%*s\n", 127 - len, "");
Pavel Emelyanov8ff65b42008-02-09 23:24:58 -080094 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095}
96
Pavel Emelyanov8ff65b42008-02-09 23:24:58 -080097static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos)
98{
99 return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
100}
101
102static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v)
103{
104}
105
106static void * sctp_objcnt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
107{
108 ++*pos;
109 return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
110}
111
112static const struct seq_operations sctp_objcnt_seq_ops = {
113 .start = sctp_objcnt_seq_start,
114 .next = sctp_objcnt_seq_next,
115 .stop = sctp_objcnt_seq_stop,
116 .show = sctp_objcnt_seq_show,
117};
118
119static int sctp_objcnt_seq_open(struct inode *inode, struct file *file)
120{
121 return seq_open(file, &sctp_objcnt_seq_ops);
122}
123
124static const struct file_operations sctp_objcnt_ops = {
125 .open = sctp_objcnt_seq_open,
126 .read = seq_read,
127 .llseek = seq_lseek,
128 .release = seq_release,
129};
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131/* Initialize the objcount in the proc filesystem. */
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000132void sctp_dbg_objcnt_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
Christophe Lucasee71a292005-07-18 13:38:07 -0700134 struct proc_dir_entry *ent;
Pavel Emelyanov8ff65b42008-02-09 23:24:58 -0800135
Wang Chen160f17e2008-02-28 14:13:16 -0800136 ent = proc_create("sctp_dbg_objcnt", 0,
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000137 net->sctp.proc_net_sctp, &sctp_objcnt_ops);
Christophe Lucasee71a292005-07-18 13:38:07 -0700138 if (!ent)
Joe Perches145ce502010-08-24 13:21:08 +0000139 pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140}
141
142/* Cleanup the objcount entry in the proc filesystem. */
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000143void sctp_dbg_objcnt_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000145 remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
147
148