Changeset 679 for GPL/trunk/include/linux/seq_file.h

Timestamp:

Mar 18, 2021, 8:57:36 PM (4 years ago)

Author:

David Azarewicz

Message:

Merge changes from Paul's uniaud32next branch.

Location:

GPL/trunk

Files:

• . (modified) (1 prop)
• include/linux/seq_file.h (modified) (1 diff)

GPL/trunk/include/linux/seq_file.h

@@ -1 @@
-/* $Id: seq_file.h,v 1.1.1.1 2003/07/02 13:57:00 eleph Exp $ */
-
 #ifndef _LINUX_SEQ_FILE_H
 #define _LINUX_SEQ_FILE_H
 
+#include <linux/string.h>
+
+struct seq_file {
+        char *buf;
+        size_t size;
+        size_t from;
+        size_t count;
+        size_t pad_until;
+        loff_t index;
+        loff_t read_pos;
+        u64 version;
+        struct semaphore lock;
+        const struct seq_operations *op;
+        int poll_event;
+        const struct file *file;
+        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);
+};
+
+/**
+ * seq_has_overflowed - check if the buffer has overflowed
+ * @m: the seq_file handle
+ *
+ * seq_files have a buffer which may overflow. When this happens a larger
+ * buffer is reallocated and all the data will be printed again.
+ * The overflow state is true when m->count == m->size.
+ *
+ * Returns true if the buffer received more than it can hold.
+ */
+static inline bool seq_has_overflowed(struct seq_file *m)
+{
+        return m->count == m->size;
+}
+
+ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
+loff_t seq_lseek(struct file *, loff_t, int);
+
+static inline void seq_printf(struct seq_file *m, const char *fmt, ...) {}
+int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
+int single_open_size(struct file *, int (*)(struct seq_file *, void *), void *, size_t);
+int single_release(struct inode *, struct file *);
+
 #endif /* _LINUX_SEQ_FILE_H */