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1 | /* SCTP kernel reference Implementation |
2 | * (C) Copyright IBM Corp. 2001, 2004 | |
d808ad9a | 3 | * |
1da177e4 | 4 | * This file is part of the SCTP kernel reference Implementation |
d808ad9a | 5 | * |
1da177e4 | 6 | * Support for memory object debugging. This allows one to monitor the |
d808ad9a YH |
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 | |
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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. | |
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15 | * |
16 | * The SCTP reference implementation is distributed in the hope that it | |
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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. | |
d808ad9a | 21 | * |
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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, | |
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25 | * Boston, MA 02111-1307, USA. |
26 | * | |
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27 | * Please send any bug reports or fixes you make to the |
28 | * email address(es): | |
29 | * lksctp developers <lksctp-developers@lists.sourceforge.net> | |
d808ad9a | 30 | * |
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31 | * Or submit a bug report through the following website: |
32 | * http://www.sf.net/projects/lksctp | |
33 | * | |
d808ad9a | 34 | * Written or modified by: |
1da177e4 | 35 | * Jon Grimm <jgrimm@us.ibm.com> |
d808ad9a | 36 | * |
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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 | ||
d808ad9a | 124 | return len; |
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125 | } |
126 | ||
127 | /* Initialize the objcount in the proc filesystem. */ | |
128 | void sctp_dbg_objcnt_init(void) | |
129 | { | |
ee71a29e CL |
130 | struct proc_dir_entry *ent; |
131 | ent = create_proc_read_entry("sctp_dbg_objcnt", 0, proc_net_sctp, | |
1da177e4 | 132 | sctp_dbg_objcnt_read, NULL); |
ee71a29e | 133 | if (!ent) |
d808ad9a | 134 | printk(KERN_WARNING |
ee71a29e | 135 | "sctp_dbg_objcnt: Unable to create /proc entry.\n"); |
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136 | } |
137 | ||
138 | /* Cleanup the objcount entry in the proc filesystem. */ | |
139 | void sctp_dbg_objcnt_exit(void) | |
140 | { | |
141 | remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp); | |
142 | } | |
143 | ||
144 |