root/include/linux/seq_file.h

INCLUDED FROM

DEFINITIONS

1. seq_cpumask
2. seq_nodemask

#ifndef _LINUX_SEQ_FILE_H
#define _LINUX_SEQ_FILE_H

#include <linux/types.h>
#include <linux/string.h>
#include <linux/mutex.h>
#include <linux/cpumask.h>
#include <linux/nodemask.h>

struct seq_operations;
struct file;
struct path;
struct inode;
struct dentry;

struct seq_file {
        char *buf;
        size_t size;
        size_t from;
        size_t count;
        loff_t index;
        u64 version;
        struct mutex lock;
        const struct seq_operations *op;
        void *private;
};

struct seq_operations {
        void * (*start) (struct seq_file *m, loff_t *pos);
        void (*stop) (struct seq_file *m, void *v);
        void * (*next) (struct seq_file *m, void *v, loff_t *pos);
        int (*show) (struct seq_file *m, void *v);
};

#define SEQ_SKIP 1

int seq_open(struct file *, const struct seq_operations *);
ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
loff_t seq_lseek(struct file *, loff_t, int);
int seq_release(struct inode *, struct file *);
int seq_escape(struct seq_file *, const char *, const char *);
int seq_putc(struct seq_file *m, char c);
int seq_puts(struct seq_file *m, const char *s);

int seq_printf(struct seq_file *, const char *, ...)
        __attribute__ ((format (printf,2,3)));

int seq_path(struct seq_file *, struct path *, char *);
int seq_dentry(struct seq_file *, struct dentry *, char *);
int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
                  char *esc);
int seq_bitmap(struct seq_file *m, unsigned long *bits, unsigned int nr_bits);
static inline int seq_cpumask(struct seq_file *m, cpumask_t *mask)
{
        return seq_bitmap(m, mask->bits, NR_CPUS);
}

static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
{
        return seq_bitmap(m, mask->bits, MAX_NUMNODES);
}

int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
int single_release(struct inode *, struct file *);
void *__seq_open_private(struct file *, const struct seq_operations *, int);
int seq_open_private(struct file *, const struct seq_operations *, int);
int seq_release_private(struct inode *, struct file *);

#define SEQ_START_TOKEN ((void *)1)

/*
 * Helpers for iteration over list_head-s in seq_files
 */

extern struct list_head *seq_list_start(struct list_head *head,
                loff_t pos);
extern struct list_head *seq_list_start_head(struct list_head *head,
                loff_t pos);
extern struct list_head *seq_list_next(void *v, struct list_head *head,
                loff_t *ppos);

#endif