ia64/linux-2.6.18-xen.hg

view net/netfilter/xt_string.c @ 871:9cbcc9008446

xen/x86: don't initialize cpu_data[]'s apicid field on generic code

Afaict, this is not only redundant with the intialization done in
drivers/xen/core/smpboot.c, but actually results - at least for
secondary CPUs - in the Xen-specific value written to be later
overwritten with whatever the generic code determines (with no
guarantee that the two values are identical).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu May 14 10:09:15 2009 +0100 (2009-05-14)
parents 831230e53067
children
line source
1 /* String matching match for iptables
2 *
3 * (C) 2005 Pablo Neira Ayuso <pablo@eurodev.net>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/skbuff.h>
14 #include <linux/netfilter/x_tables.h>
15 #include <linux/netfilter/xt_string.h>
16 #include <linux/textsearch.h>
18 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@eurodev.net>");
19 MODULE_DESCRIPTION("IP tables string match module");
20 MODULE_LICENSE("GPL");
21 MODULE_ALIAS("ipt_string");
22 MODULE_ALIAS("ip6t_string");
24 static int match(const struct sk_buff *skb,
25 const struct net_device *in,
26 const struct net_device *out,
27 const struct xt_match *match,
28 const void *matchinfo,
29 int offset,
30 unsigned int protoff,
31 int *hotdrop)
32 {
33 const struct xt_string_info *conf = matchinfo;
34 struct ts_state state;
36 memset(&state, 0, sizeof(struct ts_state));
38 return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
39 conf->to_offset, conf->config, &state)
40 != UINT_MAX) ^ conf->invert;
41 }
43 #define STRING_TEXT_PRIV(m) ((struct xt_string_info *) m)
45 static int checkentry(const char *tablename,
46 const void *ip,
47 const struct xt_match *match,
48 void *matchinfo,
49 unsigned int matchsize,
50 unsigned int hook_mask)
51 {
52 struct xt_string_info *conf = matchinfo;
53 struct ts_config *ts_conf;
55 /* Damn, can't handle this case properly with iptables... */
56 if (conf->from_offset > conf->to_offset)
57 return 0;
58 if (conf->algo[XT_STRING_MAX_ALGO_NAME_SIZE - 1] != '\0')
59 return 0;
60 if (conf->patlen > XT_STRING_MAX_PATTERN_SIZE)
61 return 0;
62 ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen,
63 GFP_KERNEL, TS_AUTOLOAD);
64 if (IS_ERR(ts_conf))
65 return 0;
67 conf->config = ts_conf;
69 return 1;
70 }
72 static void destroy(const struct xt_match *match, void *matchinfo,
73 unsigned int matchsize)
74 {
75 textsearch_destroy(STRING_TEXT_PRIV(matchinfo)->config);
76 }
78 static struct xt_match string_match = {
79 .name = "string",
80 .match = match,
81 .matchsize = sizeof(struct xt_string_info),
82 .checkentry = checkentry,
83 .destroy = destroy,
84 .family = AF_INET,
85 .me = THIS_MODULE
86 };
87 static struct xt_match string6_match = {
88 .name = "string",
89 .match = match,
90 .matchsize = sizeof(struct xt_string_info),
91 .checkentry = checkentry,
92 .destroy = destroy,
93 .family = AF_INET6,
94 .me = THIS_MODULE
95 };
97 static int __init xt_string_init(void)
98 {
99 int ret;
101 ret = xt_register_match(&string_match);
102 if (ret)
103 return ret;
104 ret = xt_register_match(&string6_match);
105 if (ret)
106 xt_unregister_match(&string_match);
108 return ret;
109 }
111 static void __exit xt_string_fini(void)
112 {
113 xt_unregister_match(&string_match);
114 xt_unregister_match(&string6_match);
115 }
117 module_init(xt_string_init);
118 module_exit(xt_string_fini);