1 /* SCTP kernel implementation
2 * (C) Copyright IBM Corp. 2001, 2004
4 * This file is part of the SCTP kernel implementation
6 * Support for memory object debugging. This allows one to monitor the
7 * object allocations/deallocations for types instrumented for this
10 * This SCTP implementation is free software;
11 * you can redistribute it and/or modify it under the terms of
12 * the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This SCTP implementation is distributed in the hope that it
17 * 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.
22 * 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,
25 * Boston, MA 02111-1307, USA.
27 * Please send any bug reports or fixes you make to the
29 * lksctp developers <lksctp-developers@lists.sourceforge.net>
31 * Or submit a bug report through the following website:
32 * http://www.sf.net/projects/lksctp
34 * Written or modified by:
35 * Jon Grimm <jgrimm@us.ibm.com>
37 * Any bugs reported given to us we will try to fix... any fixes shared will
38 * be incorporated into the next SCTP release.
41 #include <linux/kernel.h>
42 #include <net/sctp/sctp.h>
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.
51 SCTP_DBG_OBJCNT(sock);
53 SCTP_DBG_OBJCNT(transport);
54 SCTP_DBG_OBJCNT(assoc);
55 SCTP_DBG_OBJCNT(bind_addr);
56 SCTP_DBG_OBJCNT(bind_bucket);
57 SCTP_DBG_OBJCNT(chunk);
58 SCTP_DBG_OBJCNT(addr);
59 SCTP_DBG_OBJCNT(ssnmap);
60 SCTP_DBG_OBJCNT(datamsg);
61 SCTP_DBG_OBJCNT(keys);
63 /* An array to make it easy to pretty print the debug information
66 static 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),
77 SCTP_DBG_OBJCNT_ENTRY(keys),
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.
84 static int sctp_objcnt_seq_show(struct seq_file *seq, void *v)
88 i = (int)*(loff_t *)v;
89 seq_printf(seq, "%s: %d%n", sctp_dbg_objcnt[i].label,
90 atomic_read(sctp_dbg_objcnt[i].counter), &len);
91 seq_printf(seq, "%*s\n", 127 - len, "");
95 static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos)
97 return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
100 static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v)
104 static void * sctp_objcnt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
107 return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
110 static const struct seq_operations sctp_objcnt_seq_ops = {
111 .start = sctp_objcnt_seq_start,
112 .next = sctp_objcnt_seq_next,
113 .stop = sctp_objcnt_seq_stop,
114 .show = sctp_objcnt_seq_show,
117 static int sctp_objcnt_seq_open(struct inode *inode, struct file *file)
119 return seq_open(file, &sctp_objcnt_seq_ops);
122 static const struct file_operations sctp_objcnt_ops = {
123 .open = sctp_objcnt_seq_open,
126 .release = seq_release,
129 /* Initialize the objcount in the proc filesystem. */
130 void sctp_dbg_objcnt_init(void)
132 struct proc_dir_entry *ent;
134 ent = proc_create("sctp_dbg_objcnt", 0,
135 proc_net_sctp, &sctp_objcnt_ops);
138 "sctp_dbg_objcnt: Unable to create /proc entry.\n");
141 /* Cleanup the objcount entry in the proc filesystem. */
142 void sctp_dbg_objcnt_exit(void)
144 remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp);