1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2016-2018, Matthew Macy <mmacy@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef _LINUX_SEQ_FILE_H_ 31 #define _LINUX_SEQ_FILE_H_ 32 33 #include <linux/types.h> 34 #include <linux/fs.h> 35 #include <sys/sbuf.h> 36 37 #undef file 38 #define inode vnode 39 40 #define DEFINE_SHOW_ATTRIBUTE(__name) \ 41 static int __name ## _open(struct inode *inode, struct linux_file *file) \ 42 { \ 43 return single_open(file, __name ## _show, inode->i_private); \ 44 } \ 45 \ 46 static const struct file_operations __name ## _fops = { \ 47 .owner = THIS_MODULE, \ 48 .open = __name ## _open, \ 49 .read = seq_read, \ 50 .llseek = seq_lseek, \ 51 .release = single_release, \ 52 } 53 54 struct seq_operations; 55 56 struct seq_file { 57 struct sbuf *buf; 58 59 const struct seq_operations *op; 60 const struct linux_file *file; 61 void *private; 62 }; 63 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); 69 }; 70 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); 73 74 int seq_open(struct linux_file *f, const struct seq_operations *op); 75 int seq_release(struct inode *inode, struct linux_file *file); 76 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 *); 80 81 #define seq_printf(m, fmt, ...) sbuf_printf((m)->buf, (fmt), ##__VA_ARGS__) 82 83 #define seq_puts(m, str) sbuf_printf((m)->buf, str) 84 #define seq_putc(m, str) sbuf_putc((m)->buf, str) 85 86 #define file linux_file 87 88 #endif /* _LINUX_SEQ_FILE_H_ */ 89