Commit | Line | Data |
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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 | 22 | * You should have received a copy of the GNU General Public License |
4b2f13a2 JK |
23 | * along with GNU CC; see the file COPYING. If not, see |
24 | * <http://www.gnu.org/licenses/>. | |
d808ad9a | 25 | * |
1da177e4 LT |
26 | * Please send any bug reports or fixes you make to the |
27 | * email address(es): | |
91705c61 | 28 | * lksctp developers <linux-sctp@vger.kernel.org> |
d808ad9a | 29 | * |
d808ad9a | 30 | * Written or modified by: |
1da177e4 | 31 | * Jon Grimm <jgrimm@us.ibm.com> |
1da177e4 LT |
32 | */ |
33 | ||
145ce502 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <net/sctp/sctp.h> | |
38 | ||
39 | /* | |
40 | * Global counters to count raw object allocation counts. | |
41 | * To add new counters, choose a unique suffix for the variable | |
42 | * name as the helper macros key off this suffix to make | |
43 | * life easier for the programmer. | |
44 | */ | |
45 | ||
46 | SCTP_DBG_OBJCNT(sock); | |
47 | SCTP_DBG_OBJCNT(ep); | |
48 | SCTP_DBG_OBJCNT(transport); | |
49 | SCTP_DBG_OBJCNT(assoc); | |
50 | SCTP_DBG_OBJCNT(bind_addr); | |
51 | SCTP_DBG_OBJCNT(bind_bucket); | |
52 | SCTP_DBG_OBJCNT(chunk); | |
53 | SCTP_DBG_OBJCNT(addr); | |
1da177e4 | 54 | SCTP_DBG_OBJCNT(datamsg); |
1f485649 | 55 | SCTP_DBG_OBJCNT(keys); |
1da177e4 LT |
56 | |
57 | /* An array to make it easy to pretty print the debug information | |
58 | * to the proc fs. | |
59 | */ | |
d38ef5ae | 60 | static struct sctp_dbg_objcnt_entry sctp_dbg_objcnt[] = { |
1da177e4 LT |
61 | SCTP_DBG_OBJCNT_ENTRY(sock), |
62 | SCTP_DBG_OBJCNT_ENTRY(ep), | |
63 | SCTP_DBG_OBJCNT_ENTRY(assoc), | |
64 | SCTP_DBG_OBJCNT_ENTRY(transport), | |
65 | SCTP_DBG_OBJCNT_ENTRY(chunk), | |
66 | SCTP_DBG_OBJCNT_ENTRY(bind_addr), | |
67 | SCTP_DBG_OBJCNT_ENTRY(bind_bucket), | |
68 | SCTP_DBG_OBJCNT_ENTRY(addr), | |
1da177e4 | 69 | SCTP_DBG_OBJCNT_ENTRY(datamsg), |
1f485649 | 70 | SCTP_DBG_OBJCNT_ENTRY(keys), |
1da177e4 LT |
71 | }; |
72 | ||
73 | /* Callback from procfs to read out objcount information. | |
74 | * Walk through the entries in the sctp_dbg_objcnt array, dumping | |
75 | * the raw object counts for each monitored type. | |
1da177e4 | 76 | */ |
8ff65b46 | 77 | static int sctp_objcnt_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 78 | { |
652586df | 79 | int i; |
1da177e4 | 80 | |
8ff65b46 | 81 | i = (int)*(loff_t *)v; |
652586df TH |
82 | seq_setwidth(seq, 127); |
83 | seq_printf(seq, "%s: %d", sctp_dbg_objcnt[i].label, | |
84 | atomic_read(sctp_dbg_objcnt[i].counter)); | |
85 | seq_pad(seq, '\n'); | |
8ff65b46 PE |
86 | return 0; |
87 | } | |
88 | ||
89 | static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos) | |
90 | { | |
91 | return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos; | |
92 | } | |
93 | ||
94 | static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v) | |
95 | { | |
96 | } | |
97 | ||
26ac8e5f | 98 | static void *sctp_objcnt_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
8ff65b46 PE |
99 | { |
100 | ++*pos; | |
101 | return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos; | |
1da177e4 LT |
102 | } |
103 | ||
8ff65b46 PE |
104 | static const struct seq_operations sctp_objcnt_seq_ops = { |
105 | .start = sctp_objcnt_seq_start, | |
106 | .next = sctp_objcnt_seq_next, | |
107 | .stop = sctp_objcnt_seq_stop, | |
108 | .show = sctp_objcnt_seq_show, | |
109 | }; | |
110 | ||
111 | static int sctp_objcnt_seq_open(struct inode *inode, struct file *file) | |
112 | { | |
113 | return seq_open(file, &sctp_objcnt_seq_ops); | |
114 | } | |
115 | ||
116 | static const struct file_operations sctp_objcnt_ops = { | |
117 | .open = sctp_objcnt_seq_open, | |
118 | .read = seq_read, | |
119 | .llseek = seq_lseek, | |
120 | .release = seq_release, | |
121 | }; | |
122 | ||
1da177e4 | 123 | /* Initialize the objcount in the proc filesystem. */ |
13d782f6 | 124 | void sctp_dbg_objcnt_init(struct net *net) |
1da177e4 | 125 | { |
ee71a29e | 126 | struct proc_dir_entry *ent; |
8ff65b46 | 127 | |
160f17e3 | 128 | ent = proc_create("sctp_dbg_objcnt", 0, |
13d782f6 | 129 | net->sctp.proc_net_sctp, &sctp_objcnt_ops); |
ee71a29e | 130 | if (!ent) |
145ce502 | 131 | pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n"); |
1da177e4 LT |
132 | } |
133 | ||
134 | /* Cleanup the objcount entry in the proc filesystem. */ | |
13d782f6 | 135 | void sctp_dbg_objcnt_exit(struct net *net) |
1da177e4 | 136 | { |
13d782f6 | 137 | remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp); |
1da177e4 LT |
138 | } |
139 | ||
140 |