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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 | 2 | * (C) Copyright IBM Corp. 2001, 2004 |
d808ad9a | 3 | * |
60c778b2 | 4 | * This file is part of the SCTP kernel 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 | * | |
60c778b2 | 10 | * This SCTP implementation is free software; |
d808ad9a | 11 | * you can redistribute it and/or modify it under the terms of |
1da177e4 LT |
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. | |
d808ad9a | 15 | * |
60c778b2 | 16 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | * |
1da177e4 LT |
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, | |
d808ad9a YH |
25 | * Boston, MA 02111-1307, USA. |
26 | * | |
1da177e4 LT |
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 | * |
1da177e4 LT |
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 | * |
1da177e4 LT |
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 | ||
145ce502 JP |
41 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
42 | ||
1da177e4 LT |
43 | #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 | ||
53 | SCTP_DBG_OBJCNT(sock); | |
54 | SCTP_DBG_OBJCNT(ep); | |
55 | SCTP_DBG_OBJCNT(transport); | |
56 | SCTP_DBG_OBJCNT(assoc); | |
57 | SCTP_DBG_OBJCNT(bind_addr); | |
58 | SCTP_DBG_OBJCNT(bind_bucket); | |
59 | SCTP_DBG_OBJCNT(chunk); | |
60 | SCTP_DBG_OBJCNT(addr); | |
61 | SCTP_DBG_OBJCNT(ssnmap); | |
62 | SCTP_DBG_OBJCNT(datamsg); | |
1f485649 | 63 | SCTP_DBG_OBJCNT(keys); |
1da177e4 LT |
64 | |
65 | /* An array to make it easy to pretty print the debug information | |
66 | * to the proc fs. | |
67 | */ | |
68 | static 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), | |
1f485649 | 79 | SCTP_DBG_OBJCNT_ENTRY(keys), |
1da177e4 LT |
80 | }; |
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. | |
1da177e4 | 85 | */ |
8ff65b46 | 86 | static int sctp_objcnt_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 87 | { |
5e659e4c | 88 | int i, len; |
1da177e4 | 89 | |
8ff65b46 | 90 | i = (int)*(loff_t *)v; |
5e659e4c PE |
91 | 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, ""); | |
8ff65b46 PE |
94 | return 0; |
95 | } | |
96 | ||
97 | static 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 | ||
102 | static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v) | |
103 | { | |
104 | } | |
105 | ||
106 | static 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; | |
1da177e4 LT |
110 | } |
111 | ||
8ff65b46 PE |
112 | static 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 | ||
119 | static int sctp_objcnt_seq_open(struct inode *inode, struct file *file) | |
120 | { | |
121 | return seq_open(file, &sctp_objcnt_seq_ops); | |
122 | } | |
123 | ||
124 | static 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 | ||
1da177e4 | 131 | /* Initialize the objcount in the proc filesystem. */ |
13d782f6 | 132 | void sctp_dbg_objcnt_init(struct net *net) |
1da177e4 | 133 | { |
ee71a29e | 134 | struct proc_dir_entry *ent; |
8ff65b46 | 135 | |
160f17e3 | 136 | ent = proc_create("sctp_dbg_objcnt", 0, |
13d782f6 | 137 | net->sctp.proc_net_sctp, &sctp_objcnt_ops); |
ee71a29e | 138 | if (!ent) |
145ce502 | 139 | pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n"); |
1da177e4 LT |
140 | } |
141 | ||
142 | /* Cleanup the objcount entry in the proc filesystem. */ | |
13d782f6 | 143 | void sctp_dbg_objcnt_exit(struct net *net) |
1da177e4 | 144 | { |
13d782f6 | 145 | remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp); |
1da177e4 LT |
146 | } |
147 | ||
148 |