patch-2.4.20 linux-2.4.20/fs/jfs/jfs_debug.c

• Lines: 153
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/jfs/jfs_debug.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/jfs/jfs_debug.c linux-2.4.20/fs/jfs/jfs_debug.c
@@ -0,0 +1,152 @@
+/*
+ *   Copyright (c) International Business Machines Corp., 2000-2002
+ *   Portions Copyright (c) Christoph Hellwig, 2001-2002
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software 
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+#include "jfs_incore.h"
+#include "jfs_filsys.h"
+#include "jfs_debug.h"
+
+#ifdef CONFIG_JFS_DEBUG
+void dump_mem(char *label, void *data, int length)
+{
+	int i, j;
+	int *intptr = data;
+	char *charptr = data;
+	char buf[10], line[80];
+
+	printk("%s: dump of %d bytes of data at 0x%p\n\n", label, length,
+	       data);
+	for (i = 0; i < length; i += 16) {
+		line[0] = 0;
+		for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
+			sprintf(buf, " %08x", intptr[i / 4 + j]);
+			strcat(line, buf);
+		}
+		buf[0] = ' ';
+		buf[2] = 0;
+		for (j = 0; (j < 16) && (i + j < length); j++) {
+			buf[1] =
+			    isprint(charptr[i + j]) ? charptr[i + j] : '.';
+			strcat(line, buf);
+		}
+		printk("%s\n", line);
+	}
+}
+#endif
+
+#ifdef PROC_FS_JFS /* see jfs_debug.h */
+
+static struct proc_dir_entry *base;
+#ifdef CONFIG_JFS_DEBUG
+extern read_proc_t jfs_txanchor_read;
+
+static int loglevel_read(char *page, char **start, off_t off,
+			 int count, int *eof, void *data)
+{
+	int len;
+
+	len = sprintf(page, "%d\n", jfsloglevel);
+
+	len -= off;
+	*start = page + off;
+
+	if (len > count)
+		len = count;
+	else
+		*eof = 1;
+
+	if (len < 0)
+		len = 0;
+
+	return len;
+}
+
+static int loglevel_write(struct file *file, const char *buffer,
+			unsigned long count, void *data)
+{
+	char c;
+
+	if (get_user(c, buffer))
+		return -EFAULT;
+
+	/* yes, I know this is an ASCIIism.  --hch */
+	if (c < '0' || c > '9')
+		return -EINVAL;
+	jfsloglevel = c - '0';
+	return count;
+}
+#endif
+
+
+#ifdef CONFIG_JFS_STATISTICS
+extern read_proc_t jfs_lmstats_read;
+extern read_proc_t jfs_xtstat_read;
+extern read_proc_t jfs_mpstat_read;
+#endif
+
+static struct {
+	const char	*name;
+	read_proc_t	*read_fn;
+	write_proc_t	*write_fn;
+} Entries[] = {
+#ifdef CONFIG_JFS_STATISTICS
+	{ "lmstats",	jfs_lmstats_read, },
+	{ "xtstat",	jfs_xtstat_read, },
+	{ "mpstat",	jfs_mpstat_read, },
+#endif
+#ifdef CONFIG_JFS_DEBUG
+	{ "TxAnchor",	jfs_txanchor_read, },
+	{ "loglevel",	loglevel_read, loglevel_write }
+#endif
+};
+#define NPROCENT	(sizeof(Entries)/sizeof(Entries[0]))
+
+void jfs_proc_init(void)
+{
+	int i;
+
+	if (!(base = proc_mkdir("jfs", proc_root_fs)))
+		return;
+	base->owner = THIS_MODULE;
+
+	for (i = 0; i < NPROCENT; i++) {
+		struct proc_dir_entry *p;
+		if ((p = create_proc_entry(Entries[i].name, 0, base))) {
+			p->read_proc = Entries[i].read_fn;
+			p->write_proc = Entries[i].write_fn;
+		}
+	}
+}
+
+void jfs_proc_clean(void)
+{
+	int i;
+
+	if (base) {
+		for (i = 0; i < NPROCENT; i++)
+			remove_proc_entry(Entries[i].name, base);
+		remove_proc_entry("jfs", base);
+	}
+}
+
+#endif /* PROC_FS_JFS */