initial_commit

1 files changed, 156 insertions, 0 deletions

diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
new file mode 100644
index 00000000..03c0232b
--- /dev/null
+++ b/include/linux/seq_file.h
@@ -0,0 +1,156 @@
+#ifndef _LINUX_SEQ_FILE_H
+#define _LINUX_SEQ_FILE_H
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/cpumask.h>
+#include <linux/nodemask.h>
+
+struct seq_operations;
+struct file;
+struct path;
+struct inode;
+struct dentry;
+
+struct seq_file {
+	char *buf;
+	size_t size;
+	size_t from;
+	size_t count;
+	loff_t index;
+	loff_t read_pos;
+	u64 version;
+	struct mutex lock;
+	const struct seq_operations *op;
+	void *private;
+};
+
+struct seq_operations {
+	void * (*start) (struct seq_file *m, loff_t *pos);
+	void (*stop) (struct seq_file *m, void *v);
+	void * (*next) (struct seq_file *m, void *v, loff_t *pos);
+	int (*show) (struct seq_file *m, void *v);
+};
+
+#define SEQ_SKIP 1
+
+/**
+ * seq_get_buf - get buffer to write arbitrary data to
+ * @m: the seq_file handle
+ * @bufp: the beginning of the buffer is stored here
+ *
+ * Return the number of bytes available in the buffer, or zero if
+ * there's no space.
+ */
+static inline size_t seq_get_buf(struct seq_file *m, char **bufp)
+{
+	BUG_ON(m->count > m->size);
+	if (m->count < m->size)
+		*bufp = m->buf + m->count;
+	else
+		*bufp = NULL;
+
+	return m->size - m->count;
+}
+
+/**
+ * seq_commit - commit data to the buffer
+ * @m: the seq_file handle
+ * @num: the number of bytes to commit
+ *
+ * Commit @num bytes of data written to a buffer previously acquired
+ * by seq_buf_get.  To signal an error condition, or that the data
+ * didn't fit in the available space, pass a negative @num value.
+ */
+static inline void seq_commit(struct seq_file *m, int num)
+{
+	if (num < 0) {
+		m->count = m->size;
+	} else {
+		BUG_ON(m->count + num > m->size);
+		m->count += num;
+	}
+}
+
+char *mangle_path(char *s, char *p, char *esc);
+int seq_open(struct file *, const struct seq_operations *);
+ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
+loff_t seq_lseek(struct file *, loff_t, int);
+int seq_release(struct inode *, struct file *);
+int seq_escape(struct seq_file *, const char *, const char *);
+int seq_putc(struct seq_file *m, char c);
+int seq_puts(struct seq_file *m, const char *s);
+int seq_write(struct seq_file *seq, const void *data, size_t len);
+
+int seq_printf(struct seq_file *, const char *, ...)
+	__attribute__ ((format (printf,2,3)));
+
+int seq_path(struct seq_file *, struct path *, char *);
+int seq_dentry(struct seq_file *, struct dentry *, char *);
+int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
+		  char *esc);
+int seq_bitmap(struct seq_file *m, const unsigned long *bits,
+				   unsigned int nr_bits);
+static inline int seq_cpumask(struct seq_file *m, const struct cpumask *mask)
+{
+	return seq_bitmap(m, cpumask_bits(mask), nr_cpu_ids);
+}
+
+static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
+{
+	return seq_bitmap(m, mask->bits, MAX_NUMNODES);
+}
+
+int seq_bitmap_list(struct seq_file *m, const unsigned long *bits,
+		unsigned int nr_bits);
+
+static inline int seq_cpumask_list(struct seq_file *m,
+				   const struct cpumask *mask)
+{
+	return seq_bitmap_list(m, cpumask_bits(mask), nr_cpu_ids);
+}
+
+static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask)
+{
+	return seq_bitmap_list(m, mask->bits, MAX_NUMNODES);
+}
+
+int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
+int single_release(struct inode *, struct file *);
+void *__seq_open_private(struct file *, const struct seq_operations *, int);
+int seq_open_private(struct file *, const struct seq_operations *, int);
+int seq_release_private(struct inode *, struct file *);
+
+#define SEQ_START_TOKEN ((void *)1)
+
+/*
+ * Helpers for iteration over list_head-s in seq_files
+ */
+
+extern struct list_head *seq_list_start(struct list_head *head,
+		loff_t pos);
+extern struct list_head *seq_list_start_head(struct list_head *head,
+		loff_t pos);
+extern struct list_head *seq_list_next(void *v, struct list_head *head,
+		loff_t *ppos);
+
+/*
+ * Helpers for iteration over hlist_head-s in seq_files
+ */
+
+extern struct hlist_node *seq_hlist_start(struct hlist_head *head,
+					  loff_t pos);
+extern struct hlist_node *seq_hlist_start_head(struct hlist_head *head,
+					       loff_t pos);
+extern struct hlist_node *seq_hlist_next(void *v, struct hlist_head *head,
+					 loff_t *ppos);
+
+extern struct hlist_node *seq_hlist_start_rcu(struct hlist_head *head,
+					      loff_t pos);
+extern struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head,
+						   loff_t pos);
+extern struct hlist_node *seq_hlist_next_rcu(void *v,
+						   struct hlist_head *head,
+						   loff_t *ppos);
+#endif