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 #include <linux/cpumask.h> 8 #include <linux/nodemask.h> 9 10 struct seq_operations; 11 struct file; 12 struct path; 13 struct inode; 14 struct dentry; 15 16 struct seq_file { 17 char *buf; 18 size_t size; 19 size_t from; 20 size_t count; 21 loff_t index; 22 u64 version; 23 struct mutex lock; 24 const struct seq_operations *op; 25 void *private; 26 }; 27 28 struct seq_operations { 29 void * (*start) (struct seq_file *m, loff_t *pos); 30 void (*stop) (struct seq_file *m, void *v); 31 void * (*next) (struct seq_file *m, void *v, loff_t *pos); 32 int (*show) (struct seq_file *m, void *v); 33 }; 34 35 #define SEQ_SKIP 1 36 37 int seq_open(struct file *, const struct seq_operations *); 38 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); 39 loff_t seq_lseek(struct file *, loff_t, int); 40 int seq_release(struct inode *, struct file *); 41 int seq_escape(struct seq_file *, const char *, const char *); 42 int seq_putc(struct seq_file *m, char c); 43 int seq_puts(struct seq_file *m, const char *s); 44 45 int seq_printf(struct seq_file *, const char *, ...) 46 __attribute__ ((format (printf,2,3))); 47 48 int seq_path(struct seq_file *, struct path *, char *); 49 int seq_dentry(struct seq_file *, struct dentry *, char *); 50 int seq_path_root(struct seq_file *m, struct path *path, struct path *root, 51 char *esc); 52 int seq_bitmap(struct seq_file *m, unsigned long *bits, unsigned int nr_bits); 53 static inline int seq_cpumask(struct seq_file *m, cpumask_t *mask) 54 { 55 return seq_bitmap(m, mask->bits, NR_CPUS); 56 } 57 58 static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask) 59 { 60 return seq_bitmap(m, mask->bits, MAX_NUMNODES); 61 } 62 63 int seq_bitmap_list(struct seq_file *m, unsigned long *bits, 64 unsigned int nr_bits); 65 66 static inline int seq_cpumask_list(struct seq_file *m, cpumask_t *mask) 67 { 68 return seq_bitmap_list(m, mask->bits, NR_CPUS); 69 } 70 71 static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask) 72 { 73 return seq_bitmap_list(m, mask->bits, MAX_NUMNODES); 74 } 75 76 int single_open(struct file *, int (*)(struct seq_file *, void *), void *); 77 int single_release(struct inode *, struct file *); 78 void *__seq_open_private(struct file *, const struct seq_operations *, int); 79 int seq_open_private(struct file *, const struct seq_operations *, int); 80 int seq_release_private(struct inode *, struct file *); 81 82 #define SEQ_START_TOKEN ((void *)1) 83 84 /* 85 * Helpers for iteration over list_head-s in seq_files 86 */ 87 88 extern struct list_head *seq_list_start(struct list_head *head, 89 loff_t pos); 90 extern struct list_head *seq_list_start_head(struct list_head *head, 91 loff_t pos); 92 extern struct list_head *seq_list_next(void *v, struct list_head *head, 93 loff_t *ppos); 94 95 #endif 96