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
47 int seq_printf(struct seq_file *, const char *, ...)
48 __attribute__ ((format (printf,2,3)));
49
50 int seq_path(struct seq_file *, struct path *, char *);
51 int seq_dentry(struct seq_file *, struct dentry *, char *);
52 int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
53 char *esc);
54 int seq_bitmap(struct seq_file *m, const unsigned long *bits,
55 unsigned int nr_bits);
seq_cpumask(struct seq_file * m,const struct cpumask * mask)56 static inline int seq_cpumask(struct seq_file *m, const struct cpumask *mask)
57 {
58 return seq_bitmap(m, mask->bits, nr_cpu_ids);
59 }
60
seq_nodemask(struct seq_file * m,nodemask_t * mask)61 static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
62 {
63 return seq_bitmap(m, mask->bits, MAX_NUMNODES);
64 }
65
66 int seq_bitmap_list(struct seq_file *m, unsigned long *bits,
67 unsigned int nr_bits);
68
seq_cpumask_list(struct seq_file * m,cpumask_t * mask)69 static inline int seq_cpumask_list(struct seq_file *m, cpumask_t *mask)
70 {
71 return seq_bitmap_list(m, mask->bits, NR_CPUS);
72 }
73
seq_nodemask_list(struct seq_file * m,nodemask_t * mask)74 static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask)
75 {
76 return seq_bitmap_list(m, mask->bits, MAX_NUMNODES);
77 }
78
79 int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
80 int single_release(struct inode *, struct file *);
81 void *__seq_open_private(struct file *, const struct seq_operations *, int);
82 int seq_open_private(struct file *, const struct seq_operations *, int);
83 int seq_release_private(struct inode *, struct file *);
84
85 #define SEQ_START_TOKEN ((void *)1)
86
87 /*
88 * Helpers for iteration over list_head-s in seq_files
89 */
90
91 extern struct list_head *seq_list_start(struct list_head *head,
92 loff_t pos);
93 extern struct list_head *seq_list_start_head(struct list_head *head,
94 loff_t pos);
95 extern struct list_head *seq_list_next(void *v, struct list_head *head,
96 loff_t *ppos);
97
98 #endif
99