1 #ifndef _LINUX_SEQ_FILE_H 2 #define _LINUX_SEQ_FILE_H 3 #ifdef __KERNEL__ 4 5 #include <linux/types.h> 6 #include <linux/string.h> 7 #include <linux/mutex.h> 8 9 struct seq_operations; 10 struct file; 11 struct path; 12 struct inode; 13 14 struct seq_file { 15 char *buf; 16 size_t size; 17 size_t from; 18 size_t count; 19 loff_t index; 20 u64 version; 21 struct mutex lock; 22 const struct seq_operations *op; 23 void *private; 24 }; 25 26 struct seq_operations { 27 void * (*start) (struct seq_file *m, loff_t *pos); 28 void (*stop) (struct seq_file *m, void *v); 29 void * (*next) (struct seq_file *m, void *v, loff_t *pos); 30 int (*show) (struct seq_file *m, void *v); 31 }; 32 33 int seq_open(struct file *, const struct seq_operations *); 34 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); 35 loff_t seq_lseek(struct file *, loff_t, int); 36 int seq_release(struct inode *, struct file *); 37 int seq_escape(struct seq_file *, const char *, const char *); 38 int seq_putc(struct seq_file *m, char c); 39 int seq_puts(struct seq_file *m, const char *s); 40 41 int seq_printf(struct seq_file *, const char *, ...) 42 __attribute__ ((format (printf,2,3))); 43 44 int seq_path(struct seq_file *, struct path *, char *); 45 46 int single_open(struct file *, int (*)(struct seq_file *, void *), void *); 47 int single_release(struct inode *, struct file *); 48 void *__seq_open_private(struct file *, const struct seq_operations *, int); 49 int seq_open_private(struct file *, const struct seq_operations *, int); 50 int seq_release_private(struct inode *, struct file *); 51 52 #define SEQ_START_TOKEN ((void *)1) 53 54 /* 55 * Helpers for iteration over list_head-s in seq_files 56 */ 57 58 extern struct list_head *seq_list_start(struct list_head *head, 59 loff_t pos); 60 extern struct list_head *seq_list_start_head(struct list_head *head, 61 loff_t pos); 62 extern struct list_head *seq_list_next(void *v, struct list_head *head, 63 loff_t *ppos); 64 65 #endif 66 #endif 67