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-rw-r--r--fs/jfs/jfs_debug.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/fs/jfs/jfs_debug.c b/fs/jfs/jfs_debug.c
new file mode 100644
index 000000000000..91a0a889ebc5
--- /dev/null
+++ b/fs/jfs/jfs_debug.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) International Business Machines Corp., 2000-2004
+ * 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 __user *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_txstats_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, },
+ { "txstats", jfs_txstats_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", proc_root_fs);
+ }
+}
+
+#endif /* PROC_FS_JFS */