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
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 int seq_open(struct file *, const struct seq_operations *);
34 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
35 loff_t seq_lseek(struct file *, loff_t, int);
36 int seq_release(struct inode *, struct file *);
37 int seq_escape(struct seq_file *, const char *, const char *);
38 int seq_putc(struct seq_file *m, char c);
39 int seq_puts(struct seq_file *m, const char *s);
40
41 int seq_printf(struct seq_file *, const char *, ...)
42 __attribute__ ((format (printf,2,3)));
43
44 int seq_path(struct seq_file *, struct path *, char *);
45
46 int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
47 int single_release(struct inode *, struct file *);
48 void *__seq_open_private(struct file *, const struct seq_operations *, int);
49 int seq_open_private(struct file *, const struct seq_operations *, int);
50 int seq_release_private(struct inode *, struct file *);
51
52 #define SEQ_START_TOKEN ((void *)1)
53
54 /*
55 * Helpers for iteration over list_head-s in seq_files
56 */
57
58 extern struct list_head *seq_list_start(struct list_head *head,
59 loff_t pos);
60 extern struct list_head *seq_list_start_head(struct list_head *head,
61 loff_t pos);
62 extern struct list_head *seq_list_next(void *v, struct list_head *head,
63 loff_t *ppos);
64
65 struct net;
66 struct seq_net_private {
67 struct net *net;
68 };
69
70 int seq_open_net(struct inode *, struct file *,
71 const struct seq_operations *, int);
72 int seq_release_net(struct inode *, struct file *);
73 static inline struct net *seq_file_net(struct seq_file *seq)
74 {
75 return ((struct seq_net_private *)seq->private)->net;
76 }
77
78 #endif
79 #endif
80
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