1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* net/dccp/packet_history.h
*
* Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
*
* An implementation of the DCCP protocol
*
* This code has been developed by the University of Waikato WAND
* research group. For further information please see http://www.wand.net.nz/
* or e-mail Ian McDonald - iam4@cs.waikato.ac.nz
*
* This code also uses code from Lulea University, rereleased as GPL by its
* authors:
* Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
*
* Changes to meet Linux coding standards, to make it meet latest ccid3 draft
* and to make it work as a loadable module in the DCCP stack written by
* Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
*
* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/config.h>
#include <linux/string.h>
#include "packet_history.h"
struct dccp_rx_hist *dccp_rx_hist_new(const char *name)
{
struct dccp_rx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
static const char dccp_rx_hist_mask[] = "rx_hist_%s";
char *slab_name;
if (hist == NULL)
goto out;
slab_name = kmalloc(strlen(name) + sizeof(dccp_rx_hist_mask) - 1,
GFP_ATOMIC);
if (slab_name == NULL)
goto out_free_hist;
sprintf(slab_name, dccp_rx_hist_mask, name);
hist->dccprxh_slab = kmem_cache_create(slab_name,
sizeof(struct dccp_rx_hist_entry),
0, SLAB_HWCACHE_ALIGN,
NULL, NULL);
if (hist->dccprxh_slab == NULL)
goto out_free_slab_name;
out:
return hist;
out_free_slab_name:
kfree(slab_name);
out_free_hist:
kfree(hist);
hist = NULL;
goto out;
}
EXPORT_SYMBOL_GPL(dccp_rx_hist_new);
void dccp_rx_hist_delete(struct dccp_rx_hist *hist)
{
const char* name = kmem_cache_name(hist->dccprxh_slab);
kmem_cache_destroy(hist->dccprxh_slab);
kfree(name);
kfree(hist);
}
EXPORT_SYMBOL_GPL(dccp_rx_hist_delete);
void dccp_rx_hist_purge(struct dccp_rx_hist *hist, struct list_head *list)
{
struct dccp_rx_hist_entry *entry, *next;
list_for_each_entry_safe(entry, next, list, dccphrx_node) {
list_del_init(&entry->dccphrx_node);
kmem_cache_free(hist->dccprxh_slab, entry);
}
}
EXPORT_SYMBOL_GPL(dccp_rx_hist_purge);
struct dccp_rx_hist_entry *
dccp_rx_hist_find_data_packet(const struct list_head *list)
{
struct dccp_rx_hist_entry *entry, *packet = NULL;
list_for_each_entry(entry, list, dccphrx_node)
if (entry->dccphrx_type == DCCP_PKT_DATA ||
entry->dccphrx_type == DCCP_PKT_DATAACK) {
packet = entry;
break;
}
return packet;
}
EXPORT_SYMBOL_GPL(dccp_rx_hist_find_data_packet);
struct dccp_tx_hist *dccp_tx_hist_new(const char *name)
{
struct dccp_tx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
static const char dccp_tx_hist_mask[] = "tx_hist_%s";
char *slab_name;
if (hist == NULL)
goto out;
slab_name = kmalloc(strlen(name) + sizeof(dccp_tx_hist_mask) - 1,
GFP_ATOMIC);
if (slab_name == NULL)
goto out_free_hist;
sprintf(slab_name, dccp_tx_hist_mask, name);
hist->dccptxh_slab = kmem_cache_create(slab_name,
sizeof(struct dccp_tx_hist_entry),
0, SLAB_HWCACHE_ALIGN,
NULL, NULL);
if (hist->dccptxh_slab == NULL)
goto out_free_slab_name;
out:
return hist;
out_free_slab_name:
kfree(slab_name);
out_free_hist:
kfree(hist);
hist = NULL;
goto out;
}
EXPORT_SYMBOL_GPL(dccp_tx_hist_new);
void dccp_tx_hist_delete(struct dccp_tx_hist *hist)
{
const char* name = kmem_cache_name(hist->dccptxh_slab);
kmem_cache_destroy(hist->dccptxh_slab);
kfree(name);
kfree(hist);
}
EXPORT_SYMBOL_GPL(dccp_tx_hist_delete);
struct dccp_tx_hist_entry *dccp_tx_hist_find_entry(const struct list_head *list,
const u64 seq)
{
struct dccp_tx_hist_entry *packet = NULL, *entry;
list_for_each_entry(entry, list, dccphtx_node)
if (entry->dccphtx_seqno == seq) {
packet = entry;
break;
}
return packet;
}
EXPORT_SYMBOL_GPL(dccp_tx_hist_find_entry);
void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist, struct list_head *list,
struct dccp_tx_hist_entry *packet)
{
struct dccp_tx_hist_entry *next;
list_for_each_entry_safe_continue(packet, next, list, dccphtx_node) {
list_del_init(&packet->dccphtx_node);
dccp_tx_hist_entry_delete(hist, packet);
}
}
EXPORT_SYMBOL_GPL(dccp_tx_hist_purge_older);
void dccp_tx_hist_purge(struct dccp_tx_hist *hist, struct list_head *list)
{
struct dccp_tx_hist_entry *entry, *next;
list_for_each_entry_safe(entry, next, list, dccphtx_node) {
list_del_init(&entry->dccphtx_node);
dccp_tx_hist_entry_delete(hist, entry);
}
}
EXPORT_SYMBOL_GPL(dccp_tx_hist_purge);
|
