cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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jfs_debug.c (1912B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *   Copyright (C) International Business Machines Corp., 2000-2004
      4 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
      5 */
      6
      7#include <linux/fs.h>
      8#include <linux/ctype.h>
      9#include <linux/module.h>
     10#include <linux/proc_fs.h>
     11#include <linux/seq_file.h>
     12#include <linux/uaccess.h>
     13#include "jfs_incore.h"
     14#include "jfs_filsys.h"
     15#include "jfs_debug.h"
     16
     17#ifdef PROC_FS_JFS /* see jfs_debug.h */
     18
     19#ifdef CONFIG_JFS_DEBUG
     20static int jfs_loglevel_proc_show(struct seq_file *m, void *v)
     21{
     22	seq_printf(m, "%d\n", jfsloglevel);
     23	return 0;
     24}
     25
     26static int jfs_loglevel_proc_open(struct inode *inode, struct file *file)
     27{
     28	return single_open(file, jfs_loglevel_proc_show, NULL);
     29}
     30
     31static ssize_t jfs_loglevel_proc_write(struct file *file,
     32		const char __user *buffer, size_t count, loff_t *ppos)
     33{
     34	char c;
     35
     36	if (get_user(c, buffer))
     37		return -EFAULT;
     38
     39	/* yes, I know this is an ASCIIism.  --hch */
     40	if (c < '0' || c > '9')
     41		return -EINVAL;
     42	jfsloglevel = c - '0';
     43	return count;
     44}
     45
     46static const struct proc_ops jfs_loglevel_proc_ops = {
     47	.proc_open	= jfs_loglevel_proc_open,
     48	.proc_read	= seq_read,
     49	.proc_lseek	= seq_lseek,
     50	.proc_release	= single_release,
     51	.proc_write	= jfs_loglevel_proc_write,
     52};
     53#endif
     54
     55void jfs_proc_init(void)
     56{
     57	struct proc_dir_entry *base;
     58
     59	base = proc_mkdir("fs/jfs", NULL);
     60	if (!base)
     61		return;
     62
     63#ifdef CONFIG_JFS_STATISTICS
     64	proc_create_single("lmstats", 0, base, jfs_lmstats_proc_show);
     65	proc_create_single("txstats", 0, base, jfs_txstats_proc_show);
     66	proc_create_single("xtstat", 0, base, jfs_xtstat_proc_show);
     67	proc_create_single("mpstat", 0, base, jfs_mpstat_proc_show);
     68#endif
     69#ifdef CONFIG_JFS_DEBUG
     70	proc_create_single("TxAnchor", 0, base, jfs_txanchor_proc_show);
     71	proc_create("loglevel", 0, base, &jfs_loglevel_proc_ops);
     72#endif
     73}
     74
     75void jfs_proc_clean(void)
     76{
     77	remove_proc_subtree("fs/jfs", NULL);
     78}
     79
     80#endif /* PROC_FS_JFS */