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 _LINUXKPI_LINUX_SEQ_FILE_H_ 31 #define _LINUXKPI_LINUX_SEQ_FILE_H_ 32 33 #include <linux/types.h> 34 #include <linux/fs.h> 35 36 #undef file 37 #define inode vnode 38 39 MALLOC_DECLARE(M_LSEQ); 40 41 #define DEFINE_SHOW_ATTRIBUTE(__name) \ 42 static int __name ## _open(struct inode *inode, struct linux_file *file) \ 43 { \ 44 return single_open(file, __name ## _show, inode->i_private); \ 45 } \ 46 \ 47 static const struct file_operations __name ## _fops = { \ 48 .owner = THIS_MODULE, \ 49 .open = __name ## _open, \ 50 .read = seq_read, \ 51 .llseek = seq_lseek, \ 52 .release = single_release, \ 53 } 54 55 struct seq_file { 56 struct sbuf *buf; 57 const struct seq_operations *op; 58 const struct linux_file *file; 59 void *private; 60 }; 61 62 struct seq_operations { 63 void * (*start) (struct seq_file *m, off_t *pos); 64 void (*stop) (struct seq_file *m, void *v); 65 void * (*next) (struct seq_file *m, void *v, off_t *pos); 66 int (*show) (struct seq_file *m, void *v); 67 }; 68 69 ssize_t seq_read(struct linux_file *, char *, size_t, off_t *); 70 int seq_write(struct seq_file *seq, const void *data, size_t len); 71 72 void *__seq_open_private(struct linux_file *, const struct seq_operations *, int); 73 int seq_release_private(struct inode *, struct linux_file *); 74 75 int seq_open(struct linux_file *f, const struct seq_operations *op); 76 int seq_release(struct inode *inode, struct linux_file *file); 77 78 off_t seq_lseek(struct linux_file *file, off_t offset, int whence); 79 int single_open(struct linux_file *, int (*)(struct seq_file *, void *), void *); 80 int single_release(struct inode *, struct linux_file *); 81 82 void lkpi_seq_vprintf(struct seq_file *m, const char *fmt, va_list args); 83 void lkpi_seq_printf(struct seq_file *m, const char *fmt, ...); 84 85 #define seq_vprintf(...) lkpi_seq_vprintf(__VA_ARGS__) 86 #define seq_printf(...) lkpi_seq_printf(__VA_ARGS__) 87 88 #define seq_puts(m, str) sbuf_printf((m)->buf, str) 89 #define seq_putc(m, str) sbuf_putc((m)->buf, str) 90 91 #define file linux_file 92 93 #endif /* _LINUXKPI_LINUX_SEQ_FILE_H_ */ 94