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 loff_t read_pos; 23 u64 version; 24 struct mutex lock; 25 const struct seq_operations *op; 26 void *private; 27 }; 28 29 struct seq_operations { 30 void * (*start) (struct seq_file *m, loff_t *pos); 31 void (*stop) (struct seq_file *m, void *v); 32 void * (*next) (struct seq_file *m, void *v, loff_t *pos); 33 int (*show) (struct seq_file *m, void *v); 34 }; 35 36 #define SEQ_SKIP 1 37 38 char *mangle_path(char *s, char *p, char *esc); 39 int seq_open(struct file *, const struct seq_operations *); 40 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); 41 loff_t seq_lseek(struct file *, loff_t, int); 42 int seq_release(struct inode *, struct file *); 43 int seq_escape(struct seq_file *, const char *, const char *); 44 int seq_putc(struct seq_file *m, char c); 45 int seq_puts(struct seq_file *m, const char *s); 46 int seq_write(struct seq_file *seq, const void *data, size_t len); 47 48 int seq_printf(struct seq_file *, const char *, ...) 49 __attribute__ ((format (printf,2,3))); 50 51 int seq_path(struct seq_file *, struct path *, char *); 52 int seq_dentry(struct seq_file *, struct dentry *, char *); 53 int seq_path_root(struct seq_file *m, struct path *path, struct path *root, 54 char *esc); 55 int seq_bitmap(struct seq_file *m, const unsigned long *bits, 56 unsigned int nr_bits); 57 static inline int seq_cpumask(struct seq_file *m, const struct cpumask *mask) 58 { 59 return seq_bitmap(m, cpumask_bits(mask), nr_cpu_ids); 60 } 61 62 static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask) 63 { 64 return seq_bitmap(m, mask->bits, MAX_NUMNODES); 65 } 66 67 int seq_bitmap_list(struct seq_file *m, const unsigned long *bits, 68 unsigned int nr_bits); 69 70 static inline int seq_cpumask_list(struct seq_file *m, 71 const struct cpumask *mask) 72 { 73 return seq_bitmap_list(m, cpumask_bits(mask), nr_cpu_ids); 74 } 75 76 static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask) 77 { 78 return seq_bitmap_list(m, mask->bits, MAX_NUMNODES); 79 } 80 81 int single_open(struct file *, int (*)(struct seq_file *, void *), void *); 82 int single_release(struct inode *, struct file *); 83 void *__seq_open_private(struct file *, const struct seq_operations *, int); 84 int seq_open_private(struct file *, const struct seq_operations *, int); 85 int seq_release_private(struct inode *, struct file *); 86 87 #define SEQ_START_TOKEN ((void *)1) 88 89 /* 90 * Helpers for iteration over list_head-s in seq_files 91 */ 92 93 extern struct list_head *seq_list_start(struct list_head *head, 94 loff_t pos); 95 extern struct list_head *seq_list_start_head(struct list_head *head, 96 loff_t pos); 97 extern struct list_head *seq_list_next(void *v, struct list_head *head, 98 loff_t *ppos); 99 100 #endif 101