1#ifndef __LINUX_TEXTSEARCH_H
2#define __LINUX_TEXTSEARCH_H
3
4#include <linux/types.h>
5#include <linux/list.h>
6#include <linux/kernel.h>
7#include <linux/err.h>
8#include <linux/slab.h>
9
10struct module;
11
12struct ts_config;
13
14#define TS_AUTOLOAD 1
15#define TS_IGNORECASE 2
16
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20
21
22struct ts_state
23{
24 unsigned int offset;
25 char cb[40];
26};
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36
37
38struct ts_ops
39{
40 const char *name;
41 struct ts_config * (*init)(const void *, unsigned int, gfp_t, int);
42 unsigned int (*find)(struct ts_config *,
43 struct ts_state *);
44 void (*destroy)(struct ts_config *);
45 void * (*get_pattern)(struct ts_config *);
46 unsigned int (*get_pattern_len)(struct ts_config *);
47 struct module *owner;
48 struct list_head list;
49};
50
51
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55
56
57
58struct ts_config
59{
60 struct ts_ops *ops;
61 int flags;
62
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73
74
75 unsigned int (*get_next_block)(unsigned int consumed,
76 const u8 **dst,
77 struct ts_config *conf,
78 struct ts_state *state);
79
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86
87
88 void (*finish)(struct ts_config *conf,
89 struct ts_state *state);
90};
91
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103
104static inline unsigned int textsearch_next(struct ts_config *conf,
105 struct ts_state *state)
106{
107 unsigned int ret = conf->ops->find(conf, state);
108
109 if (conf->finish)
110 conf->finish(conf, state);
111
112 return ret;
113}
114
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121
122
123static inline unsigned int textsearch_find(struct ts_config *conf,
124 struct ts_state *state)
125{
126 state->offset = 0;
127 return textsearch_next(conf, state);
128}
129
130
131
132
133
134static inline void *textsearch_get_pattern(struct ts_config *conf)
135{
136 return conf->ops->get_pattern(conf);
137}
138
139
140
141
142
143static inline unsigned int textsearch_get_pattern_len(struct ts_config *conf)
144{
145 return conf->ops->get_pattern_len(conf);
146}
147
148extern int textsearch_register(struct ts_ops *);
149extern int textsearch_unregister(struct ts_ops *);
150extern struct ts_config *textsearch_prepare(const char *, const void *,
151 unsigned int, gfp_t, int);
152extern void textsearch_destroy(struct ts_config *conf);
153extern unsigned int textsearch_find_continuous(struct ts_config *,
154 struct ts_state *,
155 const void *, unsigned int);
156
157
158#define TS_PRIV_ALIGNTO 8
159#define TS_PRIV_ALIGN(len) (((len) + TS_PRIV_ALIGNTO-1) & ~(TS_PRIV_ALIGNTO-1))
160
161static inline struct ts_config *alloc_ts_config(size_t payload,
162 gfp_t gfp_mask)
163{
164 struct ts_config *conf;
165
166 conf = kzalloc(TS_PRIV_ALIGN(sizeof(*conf)) + payload, gfp_mask);
167 if (conf == NULL)
168 return ERR_PTR(-ENOMEM);
169
170 return conf;
171}
172
173static inline void *ts_config_priv(struct ts_config *conf)
174{
175 return ((u8 *) conf + TS_PRIV_ALIGN(sizeof(struct ts_config)));
176}
177
178#endif
179