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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LNSTAT_H
#define _LNSTAT_H
#include <limits.h>
#include <sys/select.h>
#define PROC_NET_STAT "/proc/net/stat"
#define LNSTAT_MAX_FILES 32
#define LNSTAT_MAX_FIELDS_PER_LINE 32
#define LNSTAT_MAX_FIELD_NAME_LEN 32
struct lnstat_file;
struct lnstat_field {
struct lnstat_file *file;
unsigned int num; /* field number in line */
char name[LNSTAT_MAX_FIELD_NAME_LEN+1];
unsigned long values[2]; /* two buffers for values */
unsigned long result;
};
struct lnstat_file {
struct lnstat_file *next;
char path[PATH_MAX+1];
char basename[NAME_MAX+1];
struct timeval last_read; /* last time of read */
struct timeval interval; /* interval */
int compat; /* 1 == backwards compat mode */
FILE *fp;
unsigned int num_fields; /* number of fields */
struct lnstat_field fields[LNSTAT_MAX_FIELDS_PER_LINE];
};
struct lnstat_file *lnstat_scan_dir(const char *path, const int num_req_files,
const char **req_files);
int lnstat_update(struct lnstat_file *lnstat_files);
int lnstat_dump(FILE *outfd, struct lnstat_file *lnstat_files);
struct lnstat_field *lnstat_find_field(struct lnstat_file *lnstat_files,
const char *name);
#endif /* _LNSTAT_H */
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