1 #ifndef _LINUX_SEQ_FILE_H
2 #define _LINUX_SEQ_FILE_H
4 #include <linux/types.h>
5 #include <linux/string.h>
7 #include <linux/mutex.h>
8 #include <linux/cpumask.h>
9 #include <linux/nodemask.h>
11 struct seq_operations
;
26 const struct seq_operations
*op
;
31 struct seq_operations
{
32 void * (*start
) (struct seq_file
*m
, loff_t
*pos
);
33 void (*stop
) (struct seq_file
*m
, void *v
);
34 void * (*next
) (struct seq_file
*m
, void *v
, loff_t
*pos
);
35 int (*show
) (struct seq_file
*m
, void *v
);
41 * seq_get_buf - get buffer to write arbitrary data to
42 * @m: the seq_file handle
43 * @bufp: the beginning of the buffer is stored here
45 * Return the number of bytes available in the buffer, or zero if
48 static inline size_t seq_get_buf(struct seq_file
*m
, char **bufp
)
50 BUG_ON(m
->count
> m
->size
);
51 if (m
->count
< m
->size
)
52 *bufp
= m
->buf
+ m
->count
;
56 return m
->size
- m
->count
;
60 * seq_commit - commit data to the buffer
61 * @m: the seq_file handle
62 * @num: the number of bytes to commit
64 * Commit @num bytes of data written to a buffer previously acquired
65 * by seq_buf_get. To signal an error condition, or that the data
66 * didn't fit in the available space, pass a negative @num value.
68 static inline void seq_commit(struct seq_file
*m
, int num
)
73 BUG_ON(m
->count
+ num
> m
->size
);
78 char *mangle_path(char *s
, const char *p
, const char *esc
);
79 int seq_open(struct file
*, const struct seq_operations
*);
80 ssize_t
seq_read(struct file
*, char __user
*, size_t, loff_t
*);
81 loff_t
seq_lseek(struct file
*, loff_t
, int);
82 int seq_release(struct inode
*, struct file
*);
83 int seq_escape(struct seq_file
*, const char *, const char *);
84 int seq_putc(struct seq_file
*m
, char c
);
85 int seq_puts(struct seq_file
*m
, const char *s
);
86 int seq_write(struct seq_file
*seq
, const void *data
, size_t len
);
88 __printf(2, 3) int seq_printf(struct seq_file
*, const char *, ...);
90 int seq_path(struct seq_file
*, const struct path
*, const char *);
91 int seq_dentry(struct seq_file
*, struct dentry
*, const char *);
92 int seq_path_root(struct seq_file
*m
, const struct path
*path
,
93 const struct path
*root
, const char *esc
);
94 int seq_bitmap(struct seq_file
*m
, const unsigned long *bits
,
95 unsigned int nr_bits
);
96 static inline int seq_cpumask(struct seq_file
*m
, const struct cpumask
*mask
)
98 return seq_bitmap(m
, cpumask_bits(mask
), nr_cpu_ids
);
101 static inline int seq_nodemask(struct seq_file
*m
, nodemask_t
*mask
)
103 return seq_bitmap(m
, mask
->bits
, MAX_NUMNODES
);
106 int seq_bitmap_list(struct seq_file
*m
, const unsigned long *bits
,
107 unsigned int nr_bits
);
109 static inline int seq_cpumask_list(struct seq_file
*m
,
110 const struct cpumask
*mask
)
112 return seq_bitmap_list(m
, cpumask_bits(mask
), nr_cpu_ids
);
115 static inline int seq_nodemask_list(struct seq_file
*m
, nodemask_t
*mask
)
117 return seq_bitmap_list(m
, mask
->bits
, MAX_NUMNODES
);
120 int single_open(struct file
*, int (*)(struct seq_file
*, void *), void *);
121 int single_release(struct inode
*, struct file
*);
122 void *__seq_open_private(struct file
*, const struct seq_operations
*, int);
123 int seq_open_private(struct file
*, const struct seq_operations
*, int);
124 int seq_release_private(struct inode
*, struct file
*);
125 int seq_put_decimal_ull(struct seq_file
*m
, char delimiter
,
126 unsigned long long num
);
127 int seq_put_decimal_ll(struct seq_file
*m
, char delimiter
,
130 #define SEQ_START_TOKEN ((void *)1)
132 * Helpers for iteration over list_head-s in seq_files
135 extern struct list_head
*seq_list_start(struct list_head
*head
,
137 extern struct list_head
*seq_list_start_head(struct list_head
*head
,
139 extern struct list_head
*seq_list_next(void *v
, struct list_head
*head
,
143 * Helpers for iteration over hlist_head-s in seq_files
146 extern struct hlist_node
*seq_hlist_start(struct hlist_head
*head
,
148 extern struct hlist_node
*seq_hlist_start_head(struct hlist_head
*head
,
150 extern struct hlist_node
*seq_hlist_next(void *v
, struct hlist_head
*head
,
153 extern struct hlist_node
*seq_hlist_start_rcu(struct hlist_head
*head
,
155 extern struct hlist_node
*seq_hlist_start_head_rcu(struct hlist_head
*head
,
157 extern struct hlist_node
*seq_hlist_next_rcu(void *v
,
158 struct hlist_head
*head
,
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