1 #ifndef _LINUX_SEQ_FILE_H 2 #define _LINUX_SEQ_FILE_H 3 4 #include <linux/types.h> 5 #include <linux/string.h> 6 #include <linux/mutex.h> 7 8 struct seq_operations; 9 struct file; 10 struct path; 11 struct inode; 12 struct dentry; 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 #define SEQ_SKIP 1 34 35 int seq_open(struct file *, const struct seq_operations *); 36 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); 37 loff_t seq_lseek(struct file *, loff_t, int); 38 int seq_release(struct inode *, struct file *); 39 int seq_escape(struct seq_file *, const char *, const char *); 40 int seq_putc(struct seq_file *m, char c); 41 int seq_puts(struct seq_file *m, const char *s); 42 43 int seq_printf(struct seq_file *, const char *, ...) 44 __attribute__ ((format (printf,2,3))); 45 46 int seq_path(struct seq_file *, struct path *, char *); 47 int seq_dentry(struct seq_file *, struct dentry *, char *); 48 int seq_path_root(struct seq_file *m, struct path *path, struct path *root, 49 char *esc); 50 51 int single_open(struct file *, int (*)(struct seq_file *, void *), void *); 52 int single_release(struct inode *, struct file *); 53 void *__seq_open_private(struct file *, const struct seq_operations *, int); 54 int seq_open_private(struct file *, const struct seq_operations *, int); 55 int seq_release_private(struct inode *, struct file *); 56 57 #define SEQ_START_TOKEN ((void *)1) 58 59 /* 60 * Helpers for iteration over list_head-s in seq_files 61 */ 62 63 extern struct list_head *seq_list_start(struct list_head *head, 64 loff_t pos); 65 extern struct list_head *seq_list_start_head(struct list_head *head, 66 loff_t pos); 67 extern struct list_head *seq_list_next(void *v, struct list_head *head, 68 loff_t *ppos); 69 70 #endif 71