Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/net/sctp/objcnt.c
Parent Directory | Revision Log
Revision 630 -
(show annotations)
(download)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 3966 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 3966 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* SCTP kernel reference Implementation |
2 | * (C) Copyright IBM Corp. 2001, 2004 |
3 | * |
4 | * This file is part of the SCTP kernel reference Implementation |
5 | * |
6 | * Support for memory object debugging. This allows one to monitor the |
7 | * 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 |
12 | * the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2, or (at your option) |
14 | * any later version. |
15 | * |
16 | * The SCTP reference 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. |
21 | * |
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. |
26 | * |
27 | * Please send any bug reports or fixes you make to the |
28 | * email address(es): |
29 | * lksctp developers <lksctp-developers@lists.sourceforge.net> |
30 | * |
31 | * Or submit a bug report through the following website: |
32 | * http://www.sf.net/projects/lksctp |
33 | * |
34 | * Written or modified by: |
35 | * Jon Grimm <jgrimm@us.ibm.com> |
36 | * |
37 | * 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 | |
51 | SCTP_DBG_OBJCNT(sock); |
52 | SCTP_DBG_OBJCNT(ep); |
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 | |
62 | /* An array to make it easy to pretty print the debug information |
63 | * to the proc fs. |
64 | */ |
65 | static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = { |
66 | SCTP_DBG_OBJCNT_ENTRY(sock), |
67 | SCTP_DBG_OBJCNT_ENTRY(ep), |
68 | SCTP_DBG_OBJCNT_ENTRY(assoc), |
69 | SCTP_DBG_OBJCNT_ENTRY(transport), |
70 | SCTP_DBG_OBJCNT_ENTRY(chunk), |
71 | SCTP_DBG_OBJCNT_ENTRY(bind_addr), |
72 | SCTP_DBG_OBJCNT_ENTRY(bind_bucket), |
73 | SCTP_DBG_OBJCNT_ENTRY(addr), |
74 | SCTP_DBG_OBJCNT_ENTRY(ssnmap), |
75 | SCTP_DBG_OBJCNT_ENTRY(datamsg), |
76 | }; |
77 | |
78 | /* Callback from procfs to read out objcount information. |
79 | * Walk through the entries in the sctp_dbg_objcnt array, dumping |
80 | * the raw object counts for each monitored type. |
81 | * |
82 | * This code was modified from similar code in route.c |
83 | */ |
84 | static int sctp_dbg_objcnt_read(char *buffer, char **start, off_t offset, |
85 | int length, int *eof, void *data) |
86 | { |
87 | int len = 0; |
88 | off_t pos = 0; |
89 | int entries; |
90 | int i; |
91 | char temp[128]; |
92 | |
93 | /* How many entries? */ |
94 | entries = ARRAY_SIZE(sctp_dbg_objcnt); |
95 | |
96 | /* Walk the entries and print out the debug information |
97 | * for proc fs. |
98 | */ |
99 | for (i = 0; i < entries; i++) { |
100 | pos += 128; |
101 | |
102 | /* Skip ahead. */ |
103 | if (pos <= offset) { |
104 | len = 0; |
105 | continue; |
106 | } |
107 | /* Print out each entry. */ |
108 | sprintf(temp, "%s: %d", |
109 | sctp_dbg_objcnt[i].label, |
110 | atomic_read(sctp_dbg_objcnt[i].counter)); |
111 | |
112 | sprintf(buffer + len, "%-127s\n", temp); |
113 | len += 128; |
114 | if (pos >= offset+length) |
115 | goto done; |
116 | } |
117 | |
118 | done: |
119 | *start = buffer + len - (pos - offset); |
120 | len = pos - offset; |
121 | if (len > length) |
122 | len = length; |
123 | |
124 | return len; |
125 | } |
126 | |
127 | /* Initialize the objcount in the proc filesystem. */ |
128 | void sctp_dbg_objcnt_init(void) |
129 | { |
130 | create_proc_read_entry("sctp_dbg_objcnt", 0, proc_net_sctp, |
131 | sctp_dbg_objcnt_read, NULL); |
132 | } |
133 | |
134 | /* Cleanup the objcount entry in the proc filesystem. */ |
135 | void sctp_dbg_objcnt_exit(void) |
136 | { |
137 | remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp); |
138 | } |
139 | |
140 |