311 lines
6.7 KiB
C
311 lines
6.7 KiB
C
/******************************************************************************
|
|
*******************************************************************************
|
|
**
|
|
** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
|
|
**
|
|
** This copyrighted material is made available to anyone wishing to use,
|
|
** modify, copy, or redistribute it subject to the terms and conditions
|
|
** of the GNU General Public License v.2.
|
|
**
|
|
*******************************************************************************
|
|
******************************************************************************/
|
|
|
|
#include <linux/pagemap.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/debugfs.h>
|
|
|
|
#include "dlm_internal.h"
|
|
|
|
|
|
static struct dentry *dlm_root;
|
|
|
|
struct rsb_iter {
|
|
int entry;
|
|
struct dlm_ls *ls;
|
|
struct list_head *next;
|
|
struct dlm_rsb *rsb;
|
|
};
|
|
|
|
static char *print_lockmode(int mode)
|
|
{
|
|
switch (mode) {
|
|
case DLM_LOCK_IV:
|
|
return "--";
|
|
case DLM_LOCK_NL:
|
|
return "NL";
|
|
case DLM_LOCK_CR:
|
|
return "CR";
|
|
case DLM_LOCK_CW:
|
|
return "CW";
|
|
case DLM_LOCK_PR:
|
|
return "PR";
|
|
case DLM_LOCK_PW:
|
|
return "PW";
|
|
case DLM_LOCK_EX:
|
|
return "EX";
|
|
default:
|
|
return "??";
|
|
}
|
|
}
|
|
|
|
static void print_lock(struct seq_file *s, struct dlm_lkb *lkb,
|
|
struct dlm_rsb *res)
|
|
{
|
|
seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode));
|
|
|
|
if (lkb->lkb_status == DLM_LKSTS_CONVERT
|
|
|| lkb->lkb_status == DLM_LKSTS_WAITING)
|
|
seq_printf(s, " (%s)", print_lockmode(lkb->lkb_rqmode));
|
|
|
|
if (lkb->lkb_range) {
|
|
/* FIXME: this warns on Alpha */
|
|
if (lkb->lkb_status == DLM_LKSTS_CONVERT
|
|
|| lkb->lkb_status == DLM_LKSTS_GRANTED)
|
|
seq_printf(s, " %" PRIx64 "-%" PRIx64,
|
|
lkb->lkb_range[GR_RANGE_START],
|
|
lkb->lkb_range[GR_RANGE_END]);
|
|
if (lkb->lkb_status == DLM_LKSTS_CONVERT
|
|
|| lkb->lkb_status == DLM_LKSTS_WAITING)
|
|
seq_printf(s, " (%" PRIx64 "-%" PRIx64 ")",
|
|
lkb->lkb_range[RQ_RANGE_START],
|
|
lkb->lkb_range[RQ_RANGE_END]);
|
|
}
|
|
|
|
if (lkb->lkb_nodeid) {
|
|
if (lkb->lkb_nodeid != res->res_nodeid)
|
|
seq_printf(s, " Remote: %3d %08x", lkb->lkb_nodeid,
|
|
lkb->lkb_remid);
|
|
else
|
|
seq_printf(s, " Master: %08x", lkb->lkb_remid);
|
|
}
|
|
|
|
if (lkb->lkb_wait_type)
|
|
seq_printf(s, " wait_type: %d", lkb->lkb_wait_type);
|
|
|
|
seq_printf(s, "\n");
|
|
}
|
|
|
|
static int print_resource(struct dlm_rsb *res, struct seq_file *s)
|
|
{
|
|
struct dlm_lkb *lkb;
|
|
int i, lvblen = res->res_ls->ls_lvblen;
|
|
|
|
seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length);
|
|
for (i = 0; i < res->res_length; i++) {
|
|
if (isprint(res->res_name[i]))
|
|
seq_printf(s, "%c", res->res_name[i]);
|
|
else
|
|
seq_printf(s, "%c", '.');
|
|
}
|
|
if (res->res_nodeid > 0)
|
|
seq_printf(s, "\" \nLocal Copy, Master is node %d\n",
|
|
res->res_nodeid);
|
|
else if (res->res_nodeid == 0)
|
|
seq_printf(s, "\" \nMaster Copy\n");
|
|
else if (res->res_nodeid == -1)
|
|
seq_printf(s, "\" \nLooking up master (lkid %x)\n",
|
|
res->res_first_lkid);
|
|
else
|
|
seq_printf(s, "\" \nInvalid master %d\n", res->res_nodeid);
|
|
|
|
/* Print the LVB: */
|
|
if (res->res_lvbptr) {
|
|
seq_printf(s, "LVB: ");
|
|
for (i = 0; i < lvblen; i++) {
|
|
if (i == lvblen / 2)
|
|
seq_printf(s, "\n ");
|
|
seq_printf(s, "%02x ",
|
|
(unsigned char) res->res_lvbptr[i]);
|
|
}
|
|
if (rsb_flag(res, RSB_VALNOTVALID))
|
|
seq_printf(s, " (INVALID)");
|
|
seq_printf(s, "\n");
|
|
}
|
|
|
|
/* Print the locks attached to this resource */
|
|
seq_printf(s, "Granted Queue\n");
|
|
list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue)
|
|
print_lock(s, lkb, res);
|
|
|
|
seq_printf(s, "Conversion Queue\n");
|
|
list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue)
|
|
print_lock(s, lkb, res);
|
|
|
|
seq_printf(s, "Waiting Queue\n");
|
|
list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue)
|
|
print_lock(s, lkb, res);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsb_iter_next(struct rsb_iter *ri)
|
|
{
|
|
struct dlm_ls *ls = ri->ls;
|
|
int i;
|
|
|
|
if (!ri->next) {
|
|
top:
|
|
/* Find the next non-empty hash bucket */
|
|
for (i = ri->entry; i < ls->ls_rsbtbl_size; i++) {
|
|
read_lock(&ls->ls_rsbtbl[i].lock);
|
|
if (!list_empty(&ls->ls_rsbtbl[i].list)) {
|
|
ri->next = ls->ls_rsbtbl[i].list.next;
|
|
read_unlock(&ls->ls_rsbtbl[i].lock);
|
|
break;
|
|
}
|
|
read_unlock(&ls->ls_rsbtbl[i].lock);
|
|
}
|
|
ri->entry = i;
|
|
|
|
if (ri->entry >= ls->ls_rsbtbl_size)
|
|
return 1;
|
|
} else {
|
|
i = ri->entry;
|
|
read_lock(&ls->ls_rsbtbl[i].lock);
|
|
ri->next = ri->next->next;
|
|
if (ri->next->next == ls->ls_rsbtbl[i].list.next) {
|
|
/* End of list - move to next bucket */
|
|
ri->next = NULL;
|
|
ri->entry++;
|
|
read_unlock(&ls->ls_rsbtbl[i].lock);
|
|
goto top;
|
|
}
|
|
read_unlock(&ls->ls_rsbtbl[i].lock);
|
|
}
|
|
ri->rsb = list_entry(ri->next, struct dlm_rsb, res_hashchain);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rsb_iter_free(struct rsb_iter *ri)
|
|
{
|
|
kfree(ri);
|
|
}
|
|
|
|
static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
|
|
{
|
|
struct rsb_iter *ri;
|
|
|
|
ri = kmalloc(sizeof *ri, GFP_KERNEL);
|
|
if (!ri)
|
|
return NULL;
|
|
|
|
ri->ls = ls;
|
|
ri->entry = 0;
|
|
ri->next = NULL;
|
|
|
|
if (rsb_iter_next(ri)) {
|
|
rsb_iter_free(ri);
|
|
return NULL;
|
|
}
|
|
|
|
return ri;
|
|
}
|
|
|
|
static void *seq_start(struct seq_file *file, loff_t *pos)
|
|
{
|
|
struct rsb_iter *ri;
|
|
loff_t n = *pos;
|
|
|
|
ri = rsb_iter_init(file->private);
|
|
if (!ri)
|
|
return NULL;
|
|
|
|
while (n--) {
|
|
if (rsb_iter_next(ri)) {
|
|
rsb_iter_free(ri);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return ri;
|
|
}
|
|
|
|
static void *seq_next(struct seq_file *file, void *iter_ptr, loff_t *pos)
|
|
{
|
|
struct rsb_iter *ri = iter_ptr;
|
|
|
|
(*pos)++;
|
|
|
|
if (rsb_iter_next(ri)) {
|
|
rsb_iter_free(ri);
|
|
return NULL;
|
|
}
|
|
|
|
return ri;
|
|
}
|
|
|
|
static void seq_stop(struct seq_file *file, void *iter_ptr)
|
|
{
|
|
/* nothing for now */
|
|
}
|
|
|
|
static int seq_show(struct seq_file *file, void *iter_ptr)
|
|
{
|
|
struct rsb_iter *ri = iter_ptr;
|
|
|
|
print_resource(ri->rsb, file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations dlm_seq_ops = {
|
|
.start = seq_start,
|
|
.next = seq_next,
|
|
.stop = seq_stop,
|
|
.show = seq_show,
|
|
};
|
|
|
|
static int do_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int ret;
|
|
|
|
ret = seq_open(file, &dlm_seq_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = file->private_data;
|
|
seq->private = inode->u.generic_ip;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations dlm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = do_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
int dlm_create_debug_file(struct dlm_ls *ls)
|
|
{
|
|
ls->ls_debug_dentry = debugfs_create_file(ls->ls_name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&dlm_fops);
|
|
return ls->ls_debug_dentry ? 0 : -ENOMEM;
|
|
}
|
|
|
|
void dlm_delete_debug_file(struct dlm_ls *ls)
|
|
{
|
|
if (ls->ls_debug_dentry)
|
|
debugfs_remove(ls->ls_debug_dentry);
|
|
}
|
|
|
|
int dlm_register_debugfs(void)
|
|
{
|
|
dlm_root = debugfs_create_dir("dlm", NULL);
|
|
return dlm_root ? 0 : -ENOMEM;
|
|
}
|
|
|
|
void dlm_unregister_debugfs(void)
|
|
{
|
|
debugfs_remove(dlm_root);
|
|
}
|
|
|