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