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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2016-2018, Matthew Macy <mmacy@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _LINUXKPI_LINUX_SEQ_FILE_H_
#define _LINUXKPI_LINUX_SEQ_FILE_H_
#include <sys/types.h>
#include <sys/sbuf.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/string_helpers.h>
#include <linux/printk.h>
#undef file
#define inode vnode
MALLOC_DECLARE(M_LSEQ);
#define DEFINE_SHOW_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct linux_file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
} \
\
static const struct file_operations __name ## _fops = { \
.owner = THIS_MODULE, \
.open = __name ## _open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}
#define DEFINE_SHOW_STORE_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct linux_file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
} \
\
static const struct file_operations __name ## _fops = { \
.owner = THIS_MODULE, \
.open = __name ## _open, \
.read = seq_read, \
.write = __name ## _write, \
.llseek = seq_lseek, \
.release = single_release, \
}
struct seq_file {
struct sbuf *buf;
size_t size;
const struct seq_operations *op;
const struct linux_file *file;
void *private;
};
struct seq_operations {
void * (*start) (struct seq_file *m, off_t *pos);
void (*stop) (struct seq_file *m, void *v);
void * (*next) (struct seq_file *m, void *v, off_t *pos);
int (*show) (struct seq_file *m, void *v);
};
ssize_t seq_read(struct linux_file *, char *, size_t, off_t *);
int seq_write(struct seq_file *seq, const void *data, size_t len);
void seq_putc(struct seq_file *m, char c);
void seq_puts(struct seq_file *m, const char *str);
bool seq_has_overflowed(struct seq_file *m);
void *__seq_open_private(struct linux_file *, const struct seq_operations *, int);
int seq_release_private(struct inode *, struct linux_file *);
int seq_open(struct linux_file *f, const struct seq_operations *op);
int seq_release(struct inode *inode, struct linux_file *file);
off_t seq_lseek(struct linux_file *file, off_t offset, int whence);
int single_open(struct linux_file *, int (*)(struct seq_file *, void *), void *);
int single_open_size(struct linux_file *, int (*)(struct seq_file *, void *), void *, size_t);
int single_release(struct inode *, struct linux_file *);
void lkpi_seq_vprintf(struct seq_file *m, const char *fmt, va_list args);
void lkpi_seq_printf(struct seq_file *m, const char *fmt, ...);
#define seq_vprintf(...) lkpi_seq_vprintf(__VA_ARGS__)
#define seq_printf(...) lkpi_seq_printf(__VA_ARGS__)
int __lkpi_hexdump_sbuf_printf(void *, const char *, ...) __printflike(2, 3);
static inline void
seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
int rowsize, int groupsize, const void *buf, size_t len, bool ascii)
{
lkpi_hex_dump(__lkpi_hexdump_sbuf_printf, m->buf, NULL, prefix_str, prefix_type,
rowsize, groupsize, buf, len, ascii);
}
#define file linux_file
#endif /* _LINUXKPI_LINUX_SEQ_FILE_H_ */
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