Date: Sat, 25 May 2019 17:17:09 +0000 (UTC) From: Johannes Lundberg <johalun@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r348273 - in stable/12/sys/compat: lindebugfs linuxkpi/common/include/linux linuxkpi/common/src Message-ID: <201905251717.x4PHH9Ol069230@repo.freebsd.org>
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Author: johalun Date: Sat May 25 17:17:08 2019 New Revision: 348273 URL: https://svnweb.freebsd.org/changeset/base/348273 Log: MFC r344485: import linux debugfs support Reviewed by: hps@ Sponsored by: iX Systems Differential Revision: https://reviews.freebsd.org/D19258 Added: stable/12/sys/compat/lindebugfs/ - copied from r344485, head/sys/compat/lindebugfs/ stable/12/sys/compat/linuxkpi/common/include/linux/debugfs.h - copied unchanged from r344485, head/sys/compat/linuxkpi/common/include/linux/debugfs.h stable/12/sys/compat/linuxkpi/common/include/linux/seq_file.h - copied unchanged from r344485, head/sys/compat/linuxkpi/common/include/linux/seq_file.h stable/12/sys/compat/linuxkpi/common/src/linux_seq_file.c - copied unchanged from r344485, head/sys/compat/linuxkpi/common/src/linux_seq_file.c Modified: Directory Properties: stable/12/ (props changed) Copied: stable/12/sys/compat/linuxkpi/common/include/linux/debugfs.h (from r344485, head/sys/compat/linuxkpi/common/include/linux/debugfs.h) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/12/sys/compat/linuxkpi/common/include/linux/debugfs.h Sat May 25 17:17:08 2019 (r348273, copy of r344485, head/sys/compat/linuxkpi/common/include/linux/debugfs.h) @@ -0,0 +1,51 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _LINUX_DEBUGFS_H_ +#define _LINUX_DEBUGFS_H_ + +#include <linux/fs.h> +#include <linux/seq_file.h> + +#include <linux/types.h> + +void debugfs_remove(struct dentry *dentry); + +struct dentry *debugfs_create_file(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops); + +struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); + +struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent, + const char *dest); + +void debugfs_remove_recursive(struct dentry *dentry); + +#endif Copied: stable/12/sys/compat/linuxkpi/common/include/linux/seq_file.h (from r344485, head/sys/compat/linuxkpi/common/include/linux/seq_file.h) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/12/sys/compat/linuxkpi/common/include/linux/seq_file.h Sat May 25 17:17:08 2019 (r348273, copy of r344485, head/sys/compat/linuxkpi/common/include/linux/seq_file.h) @@ -0,0 +1,71 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _LINUX_SEQ_FILE_H_ +#define _LINUX_SEQ_FILE_H_ + +#include <sys/sbuf.h> + +struct seq_operations; +struct linux_file; + +#define inode vnode + +struct seq_file { + struct sbuf *buf; + + 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); + +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_release(struct inode *, struct linux_file *); + +#define seq_printf(m, fmt, ...) sbuf_printf((m)->buf, (fmt), ##__VA_ARGS__) + +#define seq_puts(m, str) sbuf_printf((m)->buf, str) +#define seq_putc(m, str) sbuf_putc((m)->buf, str) + + +#endif /* _LINUX_SEQ_FILE_H_ */ Copied: stable/12/sys/compat/linuxkpi/common/src/linux_seq_file.c (from r344485, head/sys/compat/linuxkpi/common/src/linux_seq_file.c) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/12/sys/compat/linuxkpi/common/src/linux_seq_file.c Sat May 25 17:17:08 2019 (r348273, copy of r344485, head/sys/compat/linuxkpi/common/src/linux_seq_file.c) @@ -0,0 +1,157 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/systm.h> +#include <sys/param.h> +#include <sys/sbuf.h> +#include <sys/syslog.h> +#include <sys/vnode.h> + +#include <linux/seq_file.h> +#include <linux/file.h> + +#undef file +MALLOC_DEFINE(M_LSEQ, "seq_file", "seq_file"); + +ssize_t +seq_read(struct linux_file *f, char *ubuf, size_t size, off_t *ppos) +{ + struct seq_file *m = f->private_data; + void *p; + int rc; + off_t pos = 0; + + p = m->op->start(m, &pos); + rc = m->op->show(m, p); + if (rc) + return (rc); + return (size); +} + +int +seq_write(struct seq_file *seq, const void *data, size_t len) +{ + + return (sbuf_bcpy(seq->buf, data, len)); +} + +/* + * This only needs to be a valid address for lkpi + * drivers it should never actually be called + */ +off_t +seq_lseek(struct linux_file *file, off_t offset, int whence) +{ + + panic("%s not supported\n", __FUNCTION__); + return (0); +} + +static void * +single_start(struct seq_file *p, off_t *pos) +{ + + return ((void *)(uintptr_t)(*pos == 0)); +} + +static void * +single_next(struct seq_file *p, void *v, off_t *pos) +{ + + ++*pos; + return (NULL); +} + +static void +single_stop(struct seq_file *p, void *v) +{ +} + +int +seq_open(struct linux_file *f, const struct seq_operations *op) +{ + struct seq_file *p; + + if (f->private_data != NULL) + log(LOG_WARNING, "%s private_data not NULL", __func__); + + if ((p = malloc(sizeof(*p), M_LSEQ, M_NOWAIT|M_ZERO)) == NULL) + return (-ENOMEM); + + f->private_data = p; + p->op = op; + p->file = f; + return (0); +} + +int +single_open(struct linux_file *f, int (*show)(struct seq_file *, void *), void *d) +{ + struct seq_operations *op; + int rc = -ENOMEM; + + op = malloc(sizeof(*op), M_LSEQ, M_NOWAIT); + if (op) { + op->start = single_start; + op->next = single_next; + op->stop = single_stop; + op->show = show; + rc = seq_open(f, op); + if (rc) + free(op, M_LSEQ); + else + ((struct seq_file *)f->private_data)->private = d; + + } + return (rc); +} + +int +seq_release(struct inode *inode __unused, struct linux_file *file) +{ + struct seq_file *m; + + m = file->private_data; + free(m, M_LSEQ); + return (0); +} + +int +single_release(struct vnode *v, struct linux_file *f) +{ + const struct seq_operations *op = ((struct seq_file *)f->private_data)->op; + int rc; + + rc = seq_release(v, f); + free(__DECONST(void *, op), M_LSEQ); + return (rc); +}
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