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 *, ...);
89 __printf(2, 0) int seq_vprintf(struct seq_file *, const char *, va_list args);
91 int seq_path(struct seq_file *, const struct path *, const char *);
92 int seq_dentry(struct seq_file *, struct dentry *, const char *);
93 int seq_path_root(struct seq_file *m, const struct path *path,
94 const struct path *root, const char *esc);
95 int seq_bitmap(struct seq_file *m, const unsigned long *bits,
96 unsigned int nr_bits);
97 static inline int seq_cpumask(struct seq_file *m, const struct cpumask *mask)
99 return seq_bitmap(m, cpumask_bits(mask), nr_cpu_ids);
102 static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
104 return seq_bitmap(m, mask->bits, MAX_NUMNODES);
107 int seq_bitmap_list(struct seq_file *m, const unsigned long *bits,
108 unsigned int nr_bits);
110 static inline int seq_cpumask_list(struct seq_file *m,
111 const struct cpumask *mask)
113 return seq_bitmap_list(m, cpumask_bits(mask), nr_cpu_ids);
116 static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask)
118 return seq_bitmap_list(m, mask->bits, MAX_NUMNODES);
121 int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
122 int single_release(struct inode *, struct file *);
123 void *__seq_open_private(struct file *, const struct seq_operations *, int);
124 int seq_open_private(struct file *, const struct seq_operations *, int);
125 int seq_release_private(struct inode *, struct file *);
126 int seq_put_decimal_ull(struct seq_file *m, char delimiter,
127 unsigned long long num);
128 int seq_put_decimal_ll(struct seq_file *m, char delimiter,
131 #define SEQ_START_TOKEN ((void *)1)
133 * Helpers for iteration over list_head-s in seq_files
136 extern struct list_head *seq_list_start(struct list_head *head,
138 extern struct list_head *seq_list_start_head(struct list_head *head,
140 extern struct list_head *seq_list_next(void *v, struct list_head *head,
144 * Helpers for iteration over hlist_head-s in seq_files
147 extern struct hlist_node *seq_hlist_start(struct hlist_head *head,
149 extern struct hlist_node *seq_hlist_start_head(struct hlist_head *head,
151 extern struct hlist_node *seq_hlist_next(void *v, struct hlist_head *head,
154 extern struct hlist_node *seq_hlist_start_rcu(struct hlist_head *head,
156 extern struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head,
158 extern struct hlist_node *seq_hlist_next_rcu(void *v,
159 struct hlist_head *head,