textsearch.c File Reference

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/err.h>
#include <linux/textsearch.h>
#include <linux/slab.h>

Go to the source code of this file.

Data Structures
struct	ts_linear_state

Functions
int	textsearch_register (struct ts_ops *ops)
int	textsearch_unregister (struct ts_ops *ops)
unsigned int	textsearch_find_continuous (struct ts_config *conf, struct ts_state *state, const void *data, unsigned int len)
struct ts_config *	textsearch_prepare (const char *algo, const void *pattern, unsigned int len, gfp_t gfp_mask, int flags)
void	textsearch_destroy (struct ts_config *conf)
	EXPORT_SYMBOL (textsearch_register)
	EXPORT_SYMBOL (textsearch_unregister)
	EXPORT_SYMBOL (textsearch_prepare)
	EXPORT_SYMBOL (textsearch_find_continuous)
	EXPORT_SYMBOL (textsearch_destroy)

Function Documentation

EXPORT_SYMBOL

(

textsearch_register

)

EXPORT_SYMBOL

(

textsearch_unregister

)

EXPORT_SYMBOL

(

textsearch_prepare

)

EXPORT_SYMBOL

(

textsearch_find_continuous

)

EXPORT_SYMBOL

(

textsearch_destroy

)

void textsearch_destroy

(

struct ts_config *

conf

)

textsearch_destroy - destroy a search configuration : search configuration

Releases all references of the configuration and frees up the memory.

Definition at line 309 of file textsearch.c.

unsigned int textsearch_find_continuous	(	struct ts_config *	conf,
		struct ts_state *	state,
		const void *	data,
		unsigned int	len
	)

textsearch_find_continuous - search a pattern in continuous/linear data : search configuration : search state : data to search in : length of data

A simplified version of textsearch_find() for continuous/linear data. Call textsearch_next() to retrieve subsequent matches.

Returns the position of first occurrence of the pattern or UINT_MAX if no occurrence was found.

Definition at line 227 of file textsearch.c.

struct ts_config* textsearch_prepare ( const char *  algo, const void *  pattern, unsigned int  len, gfp_t  gfp_mask, int  flags  )

read

textsearch_prepare - Prepare a search : name of search algorithm : pattern data : length of pattern : allocation mask : search flags

Looks up the search algorithm module and creates a new textsearch configuration for the specified pattern. Upon completion all necessary refcnts are held and the configuration must be put back using textsearch_put() after usage.

Note: The format of the pattern may not be compatible between the various search algorithms.

Returns a new textsearch configuration according to the specified parameters or a ERR_PTR(). If a zero length pattern is passed, this function returns EINVAL.

Definition at line 260 of file textsearch.c.

int textsearch_register

(

struct ts_ops *

ops

)

textsearch_register - register a textsearch module : operations lookup table

This function must be called by textsearch modules to announce their presence. The specified & must have name set to a unique identifier and the callbacks find(), init(), get_pattern(), and get_pattern_len() must be implemented.

Returns 0 or -EEXISTS if another module has already registered with same name.

Definition at line 141 of file textsearch.c.

int textsearch_unregister

(

struct ts_ops *

ops

)

textsearch_unregister - unregister a textsearch module : operations lookup table

This function must be called by textsearch modules to announce their disappearance for examples when the module gets unloaded. The &ops parameter must be the same as the one during the registration.

Returns 0 on success or -ENOENT if no matching textsearch registration was found.

Definition at line 175 of file textsearch.c.