Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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
10struct seq_operations;
11struct file;
12struct path;
13struct inode;
14struct dentry;
15
16struct 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
29struct 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
38char *mangle_path(char *s, char *p, char *esc);
39int seq_open(struct file *, const struct seq_operations *);
40ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
41loff_t seq_lseek(struct file *, loff_t, int);
42int seq_release(struct inode *, struct file *);
43int seq_escape(struct seq_file *, const char *, const char *);
44int seq_putc(struct seq_file *m, char c);
45int seq_puts(struct seq_file *m, const char *s);
46int seq_write(struct seq_file *seq, const void *data, size_t len);
47
48int seq_printf(struct seq_file *, const char *, ...)
49 __attribute__ ((format (printf,2,3)));
50
51int seq_path(struct seq_file *, struct path *, char *);
52int seq_dentry(struct seq_file *, struct dentry *, char *);
53int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
54 char *esc);
55int seq_bitmap(struct seq_file *m, const unsigned long *bits,
56 unsigned int nr_bits);
57static 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
62static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
63{
64 return seq_bitmap(m, mask->bits, MAX_NUMNODES);
65}
66
67int seq_bitmap_list(struct seq_file *m, const unsigned long *bits,
68 unsigned int nr_bits);
69
70static 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
76static 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
81int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
82int single_release(struct inode *, struct file *);
83void *__seq_open_private(struct file *, const struct seq_operations *, int);
84int seq_open_private(struct file *, const struct seq_operations *, int);
85int 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
93extern struct list_head *seq_list_start(struct list_head *head,
94 loff_t pos);
95extern struct list_head *seq_list_start_head(struct list_head *head,
96 loff_t pos);
97extern struct list_head *seq_list_next(void *v, struct list_head *head,
98 loff_t *ppos);
99
100#endif