2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2016-2018, Matthew Macy <mmacy@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #ifndef _LINUX_SEQ_FILE_H_
31 #define _LINUX_SEQ_FILE_H_
33 #include <linux/types.h>
40 #define DEFINE_SHOW_ATTRIBUTE(__name) \
41 static int __name ## _open(struct inode *inode, struct linux_file *file) \
43 return single_open(file, __name ## _show, inode->i_private); \
46 static const struct file_operations __name ## _fops = { \
47 .owner = THIS_MODULE, \
48 .open = __name ## _open, \
50 .llseek = seq_lseek, \
51 .release = single_release, \
54 struct seq_operations;
59 const struct seq_operations *op;
60 const struct linux_file *file;
64 struct seq_operations {
65 void * (*start) (struct seq_file *m, off_t *pos);
66 void (*stop) (struct seq_file *m, void *v);
67 void * (*next) (struct seq_file *m, void *v, off_t *pos);
68 int (*show) (struct seq_file *m, void *v);
71 ssize_t seq_read(struct linux_file *, char *, size_t, off_t *);
72 int seq_write(struct seq_file *seq, const void *data, size_t len);
74 int seq_open(struct linux_file *f, const struct seq_operations *op);
75 int seq_release(struct inode *inode, struct linux_file *file);
77 off_t seq_lseek(struct linux_file *file, off_t offset, int whence);
78 int single_open(struct linux_file *, int (*)(struct seq_file *, void *), void *);
79 int single_release(struct inode *, struct linux_file *);
81 #define seq_printf(m, fmt, ...) sbuf_printf((m)->buf, (fmt), ##__VA_ARGS__)
83 #define seq_puts(m, str) sbuf_printf((m)->buf, str)
84 #define seq_putc(m, str) sbuf_putc((m)->buf, str)
86 #define file linux_file
88 #endif /* _LINUX_SEQ_FILE_H_ */