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 struct dentry; 14 15 struct seq_file { 16 char *buf; 17 size_t size; 18 size_t from; 19 size_t count; 20 loff_t index; 21 u64 version; 22 struct mutex lock; 23 const struct seq_operations *op; 24 void *private; 25 }; 26 27 struct seq_operations { 28 void * (*start) (struct seq_file *m, loff_t *pos); 29 void (*stop) (struct seq_file *m, void *v); 30 void * (*next) (struct seq_file *m, void *v, loff_t *pos); 31 int (*show) (struct seq_file *m, void *v); 32 }; 33 34 #define SEQ_SKIP 1 35 36 int seq_open(struct file *, const struct seq_operations *); 37 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); 38 loff_t seq_lseek(struct file *, loff_t, int); 39 int seq_release(struct inode *, struct file *); 40 int seq_escape(struct seq_file *, const char *, const char *); 41 int seq_putc(struct seq_file *m, char c); 42 int seq_puts(struct seq_file *m, const char *s); 43 44 int seq_printf(struct seq_file *, const char *, ...) 45 __attribute__ ((format (printf,2,3))); 46 47 int seq_path(struct seq_file *, struct path *, char *); 48 int seq_dentry(struct seq_file *, struct dentry *, char *); 49 int seq_path_root(struct seq_file *m, struct path *path, struct path *root, 50 char *esc); 51 52 int single_open(struct file *, int (*)(struct seq_file *, void *), void *); 53 int single_release(struct inode *, struct file *); 54 void *__seq_open_private(struct file *, const struct seq_operations *, int); 55 int seq_open_private(struct file *, const struct seq_operations *, int); 56 int seq_release_private(struct inode *, struct file *); 57 58 #define SEQ_START_TOKEN ((void *)1) 59 60 /* 61 * Helpers for iteration over list_head-s in seq_files 62 */ 63 64 extern struct list_head *seq_list_start(struct list_head *head, 65 loff_t pos); 66 extern struct list_head *seq_list_start_head(struct list_head *head, 67 loff_t pos); 68 extern struct list_head *seq_list_next(void *v, struct list_head *head, 69 loff_t *ppos); 70 71 #endif 72 #endif 73