cregit-Linux how code gets into the kernel

Release 4.7 include/linux/textsearch.h

Directory: include/linux
#ifndef __LINUX_TEXTSEARCH_H

#define __LINUX_TEXTSEARCH_H

#include <linux/types.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/slab.h>

struct module;

struct ts_config;


#define TS_AUTOLOAD	1 
/* Automatically load textsearch modules when needed */

#define TS_IGNORECASE	2 
/* Searches string case insensitively */

/**
 * struct ts_state - search state
 * @offset: offset for next match
 * @cb: control buffer, for persistent variables of get_next_block()
 */

struct ts_state
{
	
unsigned int		offset;
	
char			cb[40];
};

/**
 * struct ts_ops - search module operations
 * @name: name of search algorithm
 * @init: initialization function to prepare a search
 * @find: find the next occurrence of the pattern
 * @destroy: destroy algorithm specific parts of a search configuration
 * @get_pattern: return head of pattern
 * @get_pattern_len: return length of pattern
 * @owner: module reference to algorithm
 */

struct ts_ops
{
	
const char		*name;
	
struct ts_config *	(*init)(const void *, unsigned int, gfp_t, int);
	
unsigned int		(*find)(struct ts_config *,
					struct ts_state *);
	
void			(*destroy)(struct ts_config *);
	
void *			(*get_pattern)(struct ts_config *);
	
unsigned int		(*get_pattern_len)(struct ts_config *);
	
struct module		*owner;
	
struct list_head	list;
};

/**
 * struct ts_config - search configuration
 * @ops: operations of chosen algorithm
 * @flags: flags
 * @get_next_block: callback to fetch the next block to search in
 * @finish: callback to finalize a search
 */

struct ts_config
{
	
struct ts_ops		*ops;
	
int 			flags;

	/**
         * get_next_block - fetch next block of data
         * @consumed: number of bytes consumed by the caller
         * @dst: destination buffer
         * @conf: search configuration
         * @state: search state
         *
         * Called repeatedly until 0 is returned. Must assign the
         * head of the next block of data to &*dst and return the length
         * of the block or 0 if at the end. consumed == 0 indicates
         * a new search. May store/read persistent values in state->cb.
         */
	
unsigned int		(*get_next_block)(unsigned int consumed,
						  const u8 **dst,
						  struct ts_config *conf,
						  struct ts_state *state);

	/**
         * finish - finalize/clean a series of get_next_block() calls
         * @conf: search configuration
         * @state: search state
         *
         * Called after the last use of get_next_block(), may be used
         * to cleanup any leftovers.
         */
	
void			(*finish)(struct ts_config *conf,
					  struct ts_state *state);
};

/**
 * textsearch_next - continue searching for a pattern
 * @conf: search configuration
 * @state: search state
 *
 * Continues a search looking for more occurrences of the pattern.
 * textsearch_find() must be called to find the first occurrence
 * in order to reset the state.
 *
 * Returns the position of the next occurrence of the pattern or
 * UINT_MAX if not match was found.
 */ 

static inline unsigned int textsearch_next(struct ts_config *conf, struct ts_state *state) { unsigned int ret = conf->ops->find(conf, state); if (conf->finish) conf->finish(conf, state); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
thomas grafthomas graf51100.00%1100.00%
Total51100.00%1100.00%

/** * textsearch_find - start searching for a pattern * @conf: search configuration * @state: search state * * Returns the position of first occurrence of the pattern or * UINT_MAX if no match was found. */
static inline unsigned int textsearch_find(struct ts_config *conf, struct ts_state *state) { state->offset = 0; return textsearch_next(conf, state); }

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thomas grafthomas graf32100.00%1100.00%
Total32100.00%1100.00%

/** * textsearch_get_pattern - return head of the pattern * @conf: search configuration */
static inline void *textsearch_get_pattern(struct ts_config *conf) { return conf->ops->get_pattern(conf); }

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PersonTokensPropCommitsCommitProp
thomas grafthomas graf23100.00%1100.00%
Total23100.00%1100.00%

/** * textsearch_get_pattern_len - return length of the pattern * @conf: search configuration */
static inline unsigned int textsearch_get_pattern_len(struct ts_config *conf) { return conf->ops->get_pattern_len(conf); }

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PersonTokensPropCommitsCommitProp
thomas grafthomas graf23100.00%1100.00%
Total23100.00%1100.00%

extern int textsearch_register(struct ts_ops *); extern int textsearch_unregister(struct ts_ops *); extern struct ts_config *textsearch_prepare(const char *, const void *, unsigned int, gfp_t, int); extern void textsearch_destroy(struct ts_config *conf); extern unsigned int textsearch_find_continuous(struct ts_config *, struct ts_state *, const void *, unsigned int); #define TS_PRIV_ALIGNTO 8 #define TS_PRIV_ALIGN(len) (((len) + TS_PRIV_ALIGNTO-1) & ~(TS_PRIV_ALIGNTO-1))
static inline struct ts_config *alloc_ts_config(size_t payload, gfp_t gfp_mask) { struct ts_config *conf; conf = kzalloc(TS_PRIV_ALIGN(sizeof(*conf)) + payload, gfp_mask); if (conf == NULL) return ERR_PTR(-ENOMEM); return conf; }

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PersonTokensPropCommitsCommitProp
thomas grafthomas graf5296.30%133.33%
al viroal viro11.85%133.33%
joonwoo parkjoonwoo park11.85%133.33%
Total54100.00%3100.00%


static inline void *ts_config_priv(struct ts_config *conf) { return ((u8 *) conf + TS_PRIV_ALIGN(sizeof(struct ts_config))); }

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thomas grafthomas graf31100.00%1100.00%
Total31100.00%1100.00%

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
thomas grafthomas graf48395.27%112.50%
joonwoo parkjoonwoo park132.56%225.00%
tim schmielautim schmielau30.59%112.50%
paul gortmakerpaul gortmaker30.59%112.50%
al viroal viro30.59%225.00%
jan engelhardtjan engelhardt20.39%112.50%
Total507100.00%8100.00%
Directory: include/linux
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