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![Paul Gortmaker](/assets/img/avatar_default.png)
These files were getting <linux/module.h> via an implicit include path, but we want to crush those out of existence since they cost time during compiles of processing thousands of lines of headers for no reason. Give them the lightweight header that just contains the EXPORT_SYMBOL infrastructure. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
1018 lines
28 KiB
C
1018 lines
28 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* dlmdebug.c
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*
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* debug functionality for the dlm
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*
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* Copyright (C) 2004, 2008 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/sysctl.h>
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#include <linux/spinlock.h>
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#include <linux/debugfs.h>
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#include <linux/export.h>
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#include "cluster/heartbeat.h"
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#include "cluster/nodemanager.h"
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#include "cluster/tcp.h"
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#include "dlmapi.h"
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#include "dlmcommon.h"
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#include "dlmdomain.h"
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#include "dlmdebug.h"
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#define MLOG_MASK_PREFIX ML_DLM
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#include "cluster/masklog.h"
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static int stringify_lockname(const char *lockname, int locklen, char *buf,
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int len);
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void dlm_print_one_lock_resource(struct dlm_lock_resource *res)
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{
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spin_lock(&res->spinlock);
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__dlm_print_one_lock_resource(res);
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spin_unlock(&res->spinlock);
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}
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static void dlm_print_lockres_refmap(struct dlm_lock_resource *res)
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{
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int bit;
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assert_spin_locked(&res->spinlock);
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printk(" refmap nodes: [ ");
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bit = 0;
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while (1) {
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bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit);
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if (bit >= O2NM_MAX_NODES)
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break;
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printk("%u ", bit);
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bit++;
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}
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printk("], inflight=%u\n", res->inflight_locks);
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}
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static void __dlm_print_lock(struct dlm_lock *lock)
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{
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spin_lock(&lock->spinlock);
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printk(" type=%d, conv=%d, node=%u, cookie=%u:%llu, "
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"ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), "
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"pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n",
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lock->ml.type, lock->ml.convert_type, lock->ml.node,
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dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
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dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
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atomic_read(&lock->lock_refs.refcount),
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(list_empty(&lock->ast_list) ? 'y' : 'n'),
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(lock->ast_pending ? 'y' : 'n'),
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(list_empty(&lock->bast_list) ? 'y' : 'n'),
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(lock->bast_pending ? 'y' : 'n'),
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(lock->convert_pending ? 'y' : 'n'),
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(lock->lock_pending ? 'y' : 'n'),
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(lock->cancel_pending ? 'y' : 'n'),
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(lock->unlock_pending ? 'y' : 'n'));
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spin_unlock(&lock->spinlock);
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}
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void __dlm_print_one_lock_resource(struct dlm_lock_resource *res)
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{
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struct list_head *iter2;
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struct dlm_lock *lock;
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char buf[DLM_LOCKID_NAME_MAX];
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assert_spin_locked(&res->spinlock);
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stringify_lockname(res->lockname.name, res->lockname.len,
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buf, sizeof(buf));
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printk("lockres: %s, owner=%u, state=%u\n",
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buf, res->owner, res->state);
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printk(" last used: %lu, refcnt: %u, on purge list: %s\n",
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res->last_used, atomic_read(&res->refs.refcount),
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list_empty(&res->purge) ? "no" : "yes");
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printk(" on dirty list: %s, on reco list: %s, "
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"migrating pending: %s\n",
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list_empty(&res->dirty) ? "no" : "yes",
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list_empty(&res->recovering) ? "no" : "yes",
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res->migration_pending ? "yes" : "no");
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printk(" inflight locks: %d, asts reserved: %d\n",
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res->inflight_locks, atomic_read(&res->asts_reserved));
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dlm_print_lockres_refmap(res);
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printk(" granted queue:\n");
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list_for_each(iter2, &res->granted) {
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lock = list_entry(iter2, struct dlm_lock, list);
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__dlm_print_lock(lock);
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}
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printk(" converting queue:\n");
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list_for_each(iter2, &res->converting) {
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lock = list_entry(iter2, struct dlm_lock, list);
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__dlm_print_lock(lock);
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}
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printk(" blocked queue:\n");
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list_for_each(iter2, &res->blocked) {
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lock = list_entry(iter2, struct dlm_lock, list);
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__dlm_print_lock(lock);
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}
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}
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void dlm_print_one_lock(struct dlm_lock *lockid)
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{
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dlm_print_one_lock_resource(lockid->lockres);
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}
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EXPORT_SYMBOL_GPL(dlm_print_one_lock);
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static const char *dlm_errnames[] = {
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[DLM_NORMAL] = "DLM_NORMAL",
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[DLM_GRANTED] = "DLM_GRANTED",
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[DLM_DENIED] = "DLM_DENIED",
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[DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS",
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[DLM_WORKING] = "DLM_WORKING",
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[DLM_BLOCKED] = "DLM_BLOCKED",
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[DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN",
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[DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD",
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[DLM_SYSERR] = "DLM_SYSERR",
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[DLM_NOSUPPORT] = "DLM_NOSUPPORT",
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[DLM_CANCELGRANT] = "DLM_CANCELGRANT",
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[DLM_IVLOCKID] = "DLM_IVLOCKID",
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[DLM_SYNC] = "DLM_SYNC",
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[DLM_BADTYPE] = "DLM_BADTYPE",
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[DLM_BADRESOURCE] = "DLM_BADRESOURCE",
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[DLM_MAXHANDLES] = "DLM_MAXHANDLES",
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[DLM_NOCLINFO] = "DLM_NOCLINFO",
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[DLM_NOLOCKMGR] = "DLM_NOLOCKMGR",
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[DLM_NOPURGED] = "DLM_NOPURGED",
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[DLM_BADARGS] = "DLM_BADARGS",
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[DLM_VOID] = "DLM_VOID",
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[DLM_NOTQUEUED] = "DLM_NOTQUEUED",
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[DLM_IVBUFLEN] = "DLM_IVBUFLEN",
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[DLM_CVTUNGRANT] = "DLM_CVTUNGRANT",
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[DLM_BADPARAM] = "DLM_BADPARAM",
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[DLM_VALNOTVALID] = "DLM_VALNOTVALID",
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[DLM_REJECTED] = "DLM_REJECTED",
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[DLM_ABORT] = "DLM_ABORT",
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[DLM_CANCEL] = "DLM_CANCEL",
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[DLM_IVRESHANDLE] = "DLM_IVRESHANDLE",
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[DLM_DEADLOCK] = "DLM_DEADLOCK",
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[DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS",
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[DLM_FORWARD] = "DLM_FORWARD",
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[DLM_TIMEOUT] = "DLM_TIMEOUT",
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[DLM_IVGROUPID] = "DLM_IVGROUPID",
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[DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT",
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[DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH",
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[DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION",
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[DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ",
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[DLM_RECOVERING] = "DLM_RECOVERING",
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[DLM_MIGRATING] = "DLM_MIGRATING",
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[DLM_MAXSTATS] = "DLM_MAXSTATS",
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};
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static const char *dlm_errmsgs[] = {
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[DLM_NORMAL] = "request in progress",
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[DLM_GRANTED] = "request granted",
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[DLM_DENIED] = "request denied",
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[DLM_DENIED_NOLOCKS] = "request denied, out of system resources",
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[DLM_WORKING] = "async request in progress",
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[DLM_BLOCKED] = "lock request blocked",
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[DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock",
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[DLM_DENIED_GRACE_PERIOD] = "topological change in progress",
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[DLM_SYSERR] = "system error",
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[DLM_NOSUPPORT] = "unsupported",
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[DLM_CANCELGRANT] = "can't cancel convert: already granted",
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[DLM_IVLOCKID] = "bad lockid",
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[DLM_SYNC] = "synchronous request granted",
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[DLM_BADTYPE] = "bad resource type",
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[DLM_BADRESOURCE] = "bad resource handle",
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[DLM_MAXHANDLES] = "no more resource handles",
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[DLM_NOCLINFO] = "can't contact cluster manager",
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[DLM_NOLOCKMGR] = "can't contact lock manager",
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[DLM_NOPURGED] = "can't contact purge daemon",
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[DLM_BADARGS] = "bad api args",
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[DLM_VOID] = "no status",
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[DLM_NOTQUEUED] = "NOQUEUE was specified and request failed",
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[DLM_IVBUFLEN] = "invalid resource name length",
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[DLM_CVTUNGRANT] = "attempted to convert ungranted lock",
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[DLM_BADPARAM] = "invalid lock mode specified",
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[DLM_VALNOTVALID] = "value block has been invalidated",
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[DLM_REJECTED] = "request rejected, unrecognized client",
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[DLM_ABORT] = "blocked lock request cancelled",
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[DLM_CANCEL] = "conversion request cancelled",
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[DLM_IVRESHANDLE] = "invalid resource handle",
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[DLM_DEADLOCK] = "deadlock recovery refused this request",
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[DLM_DENIED_NOASTS] = "failed to allocate AST",
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[DLM_FORWARD] = "request must wait for primary's response",
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[DLM_TIMEOUT] = "timeout value for lock has expired",
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[DLM_IVGROUPID] = "invalid group specification",
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[DLM_VERS_CONFLICT] = "version conflicts prevent request handling",
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[DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong",
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[DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device",
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[DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ",
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[DLM_RECOVERING] = "lock resource being recovered",
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[DLM_MIGRATING] = "lock resource being migrated",
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[DLM_MAXSTATS] = "invalid error number",
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};
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const char *dlm_errmsg(enum dlm_status err)
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{
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if (err >= DLM_MAXSTATS || err < 0)
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return dlm_errmsgs[DLM_MAXSTATS];
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return dlm_errmsgs[err];
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}
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EXPORT_SYMBOL_GPL(dlm_errmsg);
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const char *dlm_errname(enum dlm_status err)
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{
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if (err >= DLM_MAXSTATS || err < 0)
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return dlm_errnames[DLM_MAXSTATS];
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return dlm_errnames[err];
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}
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EXPORT_SYMBOL_GPL(dlm_errname);
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/* NOTE: This function converts a lockname into a string. It uses knowledge
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* of the format of the lockname that should be outside the purview of the dlm.
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* We are adding only to make dlm debugging slightly easier.
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*
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* For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h.
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*/
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static int stringify_lockname(const char *lockname, int locklen, char *buf,
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int len)
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{
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int out = 0;
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__be64 inode_blkno_be;
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#define OCFS2_DENTRY_LOCK_INO_START 18
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if (*lockname == 'N') {
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memcpy((__be64 *)&inode_blkno_be,
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(char *)&lockname[OCFS2_DENTRY_LOCK_INO_START],
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sizeof(__be64));
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out += snprintf(buf + out, len - out, "%.*s%08x",
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OCFS2_DENTRY_LOCK_INO_START - 1, lockname,
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(unsigned int)be64_to_cpu(inode_blkno_be));
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} else
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out += snprintf(buf + out, len - out, "%.*s",
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locklen, lockname);
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return out;
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}
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static int stringify_nodemap(unsigned long *nodemap, int maxnodes,
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char *buf, int len)
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{
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int out = 0;
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int i = -1;
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while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes)
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out += snprintf(buf + out, len - out, "%d ", i);
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return out;
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}
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static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)
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{
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int out = 0;
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char *mle_type;
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if (mle->type == DLM_MLE_BLOCK)
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mle_type = "BLK";
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else if (mle->type == DLM_MLE_MASTER)
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mle_type = "MAS";
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else
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mle_type = "MIG";
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out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out);
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out += snprintf(buf + out, len - out,
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"\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",
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mle_type, mle->master, mle->new_master,
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!list_empty(&mle->hb_events),
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!!mle->inuse,
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atomic_read(&mle->mle_refs.refcount));
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out += snprintf(buf + out, len - out, "Maybe=");
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out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES,
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buf + out, len - out);
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out += snprintf(buf + out, len - out, "\n");
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out += snprintf(buf + out, len - out, "Vote=");
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out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES,
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buf + out, len - out);
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out += snprintf(buf + out, len - out, "\n");
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out += snprintf(buf + out, len - out, "Response=");
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out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES,
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buf + out, len - out);
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out += snprintf(buf + out, len - out, "\n");
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out += snprintf(buf + out, len - out, "Node=");
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out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES,
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buf + out, len - out);
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out += snprintf(buf + out, len - out, "\n");
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out += snprintf(buf + out, len - out, "\n");
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return out;
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}
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void dlm_print_one_mle(struct dlm_master_list_entry *mle)
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{
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char *buf;
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buf = (char *) get_zeroed_page(GFP_NOFS);
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if (buf) {
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dump_mle(mle, buf, PAGE_SIZE - 1);
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free_page((unsigned long)buf);
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}
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}
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#ifdef CONFIG_DEBUG_FS
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static struct dentry *dlm_debugfs_root = NULL;
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#define DLM_DEBUGFS_DIR "o2dlm"
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#define DLM_DEBUGFS_DLM_STATE "dlm_state"
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#define DLM_DEBUGFS_LOCKING_STATE "locking_state"
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#define DLM_DEBUGFS_MLE_STATE "mle_state"
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#define DLM_DEBUGFS_PURGE_LIST "purge_list"
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|
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/* begin - utils funcs */
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static void dlm_debug_free(struct kref *kref)
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{
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struct dlm_debug_ctxt *dc;
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dc = container_of(kref, struct dlm_debug_ctxt, debug_refcnt);
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kfree(dc);
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}
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static void dlm_debug_put(struct dlm_debug_ctxt *dc)
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{
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if (dc)
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kref_put(&dc->debug_refcnt, dlm_debug_free);
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}
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|
|
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static void dlm_debug_get(struct dlm_debug_ctxt *dc)
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{
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kref_get(&dc->debug_refcnt);
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}
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|
|
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static int debug_release(struct inode *inode, struct file *file)
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{
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free_page((unsigned long)file->private_data);
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return 0;
|
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}
|
|
|
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static ssize_t debug_read(struct file *file, char __user *buf,
|
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size_t nbytes, loff_t *ppos)
|
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{
|
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return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
|
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i_size_read(file->f_mapping->host));
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}
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/* end - util funcs */
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|
|
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/* begin - purge list funcs */
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static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len)
|
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{
|
|
struct dlm_lock_resource *res;
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int out = 0;
|
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unsigned long total = 0;
|
|
|
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out += snprintf(buf + out, len - out,
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"Dumping Purgelist for Domain: %s\n", dlm->name);
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|
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spin_lock(&dlm->spinlock);
|
|
list_for_each_entry(res, &dlm->purge_list, purge) {
|
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++total;
|
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if (len - out < 100)
|
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continue;
|
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spin_lock(&res->spinlock);
|
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out += stringify_lockname(res->lockname.name,
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res->lockname.len,
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buf + out, len - out);
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out += snprintf(buf + out, len - out, "\t%ld\n",
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(jiffies - res->last_used)/HZ);
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spin_unlock(&res->spinlock);
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}
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spin_unlock(&dlm->spinlock);
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|
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out += snprintf(buf + out, len - out, "Total on list: %ld\n", total);
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|
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return out;
|
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}
|
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|
|
static int debug_purgelist_open(struct inode *inode, struct file *file)
|
|
{
|
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struct dlm_ctxt *dlm = inode->i_private;
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char *buf = NULL;
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|
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buf = (char *) get_zeroed_page(GFP_NOFS);
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if (!buf)
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goto bail;
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|
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i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1));
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|
|
file->private_data = buf;
|
|
|
|
return 0;
|
|
bail:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static const struct file_operations debug_purgelist_fops = {
|
|
.open = debug_purgelist_open,
|
|
.release = debug_release,
|
|
.read = debug_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
/* end - purge list funcs */
|
|
|
|
/* begin - debug mle funcs */
|
|
static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len)
|
|
{
|
|
struct dlm_master_list_entry *mle;
|
|
struct hlist_head *bucket;
|
|
struct hlist_node *list;
|
|
int i, out = 0;
|
|
unsigned long total = 0, longest = 0, bucket_count = 0;
|
|
|
|
out += snprintf(buf + out, len - out,
|
|
"Dumping MLEs for Domain: %s\n", dlm->name);
|
|
|
|
spin_lock(&dlm->master_lock);
|
|
for (i = 0; i < DLM_HASH_BUCKETS; i++) {
|
|
bucket = dlm_master_hash(dlm, i);
|
|
hlist_for_each(list, bucket) {
|
|
mle = hlist_entry(list, struct dlm_master_list_entry,
|
|
master_hash_node);
|
|
++total;
|
|
++bucket_count;
|
|
if (len - out < 200)
|
|
continue;
|
|
out += dump_mle(mle, buf + out, len - out);
|
|
}
|
|
longest = max(longest, bucket_count);
|
|
bucket_count = 0;
|
|
}
|
|
spin_unlock(&dlm->master_lock);
|
|
|
|
out += snprintf(buf + out, len - out,
|
|
"Total: %ld, Longest: %ld\n", total, longest);
|
|
return out;
|
|
}
|
|
|
|
static int debug_mle_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct dlm_ctxt *dlm = inode->i_private;
|
|
char *buf = NULL;
|
|
|
|
buf = (char *) get_zeroed_page(GFP_NOFS);
|
|
if (!buf)
|
|
goto bail;
|
|
|
|
i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1));
|
|
|
|
file->private_data = buf;
|
|
|
|
return 0;
|
|
bail:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static const struct file_operations debug_mle_fops = {
|
|
.open = debug_mle_open,
|
|
.release = debug_release,
|
|
.read = debug_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
/* end - debug mle funcs */
|
|
|
|
/* begin - debug lockres funcs */
|
|
static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len)
|
|
{
|
|
int out;
|
|
|
|
#define DEBUG_LOCK_VERSION 1
|
|
spin_lock(&lock->spinlock);
|
|
out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d,"
|
|
"%d,%d,%d,%d\n",
|
|
DEBUG_LOCK_VERSION,
|
|
list_type, lock->ml.type, lock->ml.convert_type,
|
|
lock->ml.node,
|
|
dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
|
|
dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
|
|
!list_empty(&lock->ast_list),
|
|
!list_empty(&lock->bast_list),
|
|
lock->ast_pending, lock->bast_pending,
|
|
lock->convert_pending, lock->lock_pending,
|
|
lock->cancel_pending, lock->unlock_pending,
|
|
atomic_read(&lock->lock_refs.refcount));
|
|
spin_unlock(&lock->spinlock);
|
|
|
|
return out;
|
|
}
|
|
|
|
static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len)
|
|
{
|
|
struct dlm_lock *lock;
|
|
int i;
|
|
int out = 0;
|
|
|
|
out += snprintf(buf + out, len - out, "NAME:");
|
|
out += stringify_lockname(res->lockname.name, res->lockname.len,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
#define DEBUG_LRES_VERSION 1
|
|
out += snprintf(buf + out, len - out,
|
|
"LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n",
|
|
DEBUG_LRES_VERSION,
|
|
res->owner, res->state, res->last_used,
|
|
!list_empty(&res->purge),
|
|
!list_empty(&res->dirty),
|
|
!list_empty(&res->recovering),
|
|
res->inflight_locks, res->migration_pending,
|
|
atomic_read(&res->asts_reserved),
|
|
atomic_read(&res->refs.refcount));
|
|
|
|
/* refmap */
|
|
out += snprintf(buf + out, len - out, "RMAP:");
|
|
out += stringify_nodemap(res->refmap, O2NM_MAX_NODES,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* lvb */
|
|
out += snprintf(buf + out, len - out, "LVBX:");
|
|
for (i = 0; i < DLM_LVB_LEN; i++)
|
|
out += snprintf(buf + out, len - out,
|
|
"%02x", (unsigned char)res->lvb[i]);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* granted */
|
|
list_for_each_entry(lock, &res->granted, list)
|
|
out += dump_lock(lock, 0, buf + out, len - out);
|
|
|
|
/* converting */
|
|
list_for_each_entry(lock, &res->converting, list)
|
|
out += dump_lock(lock, 1, buf + out, len - out);
|
|
|
|
/* blocked */
|
|
list_for_each_entry(lock, &res->blocked, list)
|
|
out += dump_lock(lock, 2, buf + out, len - out);
|
|
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
return out;
|
|
}
|
|
|
|
static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
struct debug_lockres *dl = m->private;
|
|
struct dlm_ctxt *dlm = dl->dl_ctxt;
|
|
struct dlm_lock_resource *oldres = dl->dl_res;
|
|
struct dlm_lock_resource *res = NULL;
|
|
struct list_head *track_list;
|
|
|
|
spin_lock(&dlm->track_lock);
|
|
if (oldres)
|
|
track_list = &oldres->tracking;
|
|
else {
|
|
track_list = &dlm->tracking_list;
|
|
if (list_empty(track_list)) {
|
|
dl = NULL;
|
|
spin_unlock(&dlm->track_lock);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(res, track_list, tracking) {
|
|
if (&res->tracking == &dlm->tracking_list)
|
|
res = NULL;
|
|
else
|
|
dlm_lockres_get(res);
|
|
break;
|
|
}
|
|
spin_unlock(&dlm->track_lock);
|
|
|
|
if (oldres)
|
|
dlm_lockres_put(oldres);
|
|
|
|
dl->dl_res = res;
|
|
|
|
if (res) {
|
|
spin_lock(&res->spinlock);
|
|
dump_lockres(res, dl->dl_buf, dl->dl_len - 1);
|
|
spin_unlock(&res->spinlock);
|
|
} else
|
|
dl = NULL;
|
|
|
|
bail:
|
|
/* passed to seq_show */
|
|
return dl;
|
|
}
|
|
|
|
static void lockres_seq_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int lockres_seq_show(struct seq_file *s, void *v)
|
|
{
|
|
struct debug_lockres *dl = (struct debug_lockres *)v;
|
|
|
|
seq_printf(s, "%s", dl->dl_buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations debug_lockres_ops = {
|
|
.start = lockres_seq_start,
|
|
.stop = lockres_seq_stop,
|
|
.next = lockres_seq_next,
|
|
.show = lockres_seq_show,
|
|
};
|
|
|
|
static int debug_lockres_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct dlm_ctxt *dlm = inode->i_private;
|
|
int ret = -ENOMEM;
|
|
struct seq_file *seq;
|
|
struct debug_lockres *dl = NULL;
|
|
|
|
dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL);
|
|
if (!dl) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
|
|
dl->dl_len = PAGE_SIZE;
|
|
dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL);
|
|
if (!dl->dl_buf) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
|
|
ret = seq_open(file, &debug_lockres_ops);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
|
|
seq = file->private_data;
|
|
seq->private = dl;
|
|
|
|
dlm_grab(dlm);
|
|
dl->dl_ctxt = dlm;
|
|
|
|
return 0;
|
|
bail:
|
|
if (dl)
|
|
kfree(dl->dl_buf);
|
|
kfree(dl);
|
|
return ret;
|
|
}
|
|
|
|
static int debug_lockres_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq = file->private_data;
|
|
struct debug_lockres *dl = (struct debug_lockres *)seq->private;
|
|
|
|
if (dl->dl_res)
|
|
dlm_lockres_put(dl->dl_res);
|
|
dlm_put(dl->dl_ctxt);
|
|
kfree(dl->dl_buf);
|
|
return seq_release_private(inode, file);
|
|
}
|
|
|
|
static const struct file_operations debug_lockres_fops = {
|
|
.open = debug_lockres_open,
|
|
.release = debug_lockres_release,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
};
|
|
/* end - debug lockres funcs */
|
|
|
|
/* begin - debug state funcs */
|
|
static int debug_state_print(struct dlm_ctxt *dlm, char *buf, int len)
|
|
{
|
|
int out = 0;
|
|
struct dlm_reco_node_data *node;
|
|
char *state;
|
|
int cur_mles = 0, tot_mles = 0;
|
|
int i;
|
|
|
|
spin_lock(&dlm->spinlock);
|
|
|
|
switch (dlm->dlm_state) {
|
|
case DLM_CTXT_NEW:
|
|
state = "NEW"; break;
|
|
case DLM_CTXT_JOINED:
|
|
state = "JOINED"; break;
|
|
case DLM_CTXT_IN_SHUTDOWN:
|
|
state = "SHUTDOWN"; break;
|
|
case DLM_CTXT_LEAVING:
|
|
state = "LEAVING"; break;
|
|
default:
|
|
state = "UNKNOWN"; break;
|
|
}
|
|
|
|
/* Domain: xxxxxxxxxx Key: 0xdfbac769 */
|
|
out += snprintf(buf + out, len - out,
|
|
"Domain: %s Key: 0x%08x Protocol: %d.%d\n",
|
|
dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major,
|
|
dlm->dlm_locking_proto.pv_minor);
|
|
|
|
/* Thread Pid: xxx Node: xxx State: xxxxx */
|
|
out += snprintf(buf + out, len - out,
|
|
"Thread Pid: %d Node: %d State: %s\n",
|
|
task_pid_nr(dlm->dlm_thread_task), dlm->node_num, state);
|
|
|
|
/* Number of Joins: xxx Joining Node: xxx */
|
|
out += snprintf(buf + out, len - out,
|
|
"Number of Joins: %d Joining Node: %d\n",
|
|
dlm->num_joins, dlm->joining_node);
|
|
|
|
/* Domain Map: xx xx xx */
|
|
out += snprintf(buf + out, len - out, "Domain Map: ");
|
|
out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* Exit Domain Map: xx xx xx */
|
|
out += snprintf(buf + out, len - out, "Exit Domain Map: ");
|
|
out += stringify_nodemap(dlm->exit_domain_map, O2NM_MAX_NODES,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* Live Map: xx xx xx */
|
|
out += snprintf(buf + out, len - out, "Live Map: ");
|
|
out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* Lock Resources: xxx (xxx) */
|
|
out += snprintf(buf + out, len - out,
|
|
"Lock Resources: %d (%d)\n",
|
|
atomic_read(&dlm->res_cur_count),
|
|
atomic_read(&dlm->res_tot_count));
|
|
|
|
for (i = 0; i < DLM_MLE_NUM_TYPES; ++i)
|
|
tot_mles += atomic_read(&dlm->mle_tot_count[i]);
|
|
|
|
for (i = 0; i < DLM_MLE_NUM_TYPES; ++i)
|
|
cur_mles += atomic_read(&dlm->mle_cur_count[i]);
|
|
|
|
/* MLEs: xxx (xxx) */
|
|
out += snprintf(buf + out, len - out,
|
|
"MLEs: %d (%d)\n", cur_mles, tot_mles);
|
|
|
|
/* Blocking: xxx (xxx) */
|
|
out += snprintf(buf + out, len - out,
|
|
" Blocking: %d (%d)\n",
|
|
atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]),
|
|
atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK]));
|
|
|
|
/* Mastery: xxx (xxx) */
|
|
out += snprintf(buf + out, len - out,
|
|
" Mastery: %d (%d)\n",
|
|
atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]),
|
|
atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER]));
|
|
|
|
/* Migration: xxx (xxx) */
|
|
out += snprintf(buf + out, len - out,
|
|
" Migration: %d (%d)\n",
|
|
atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]),
|
|
atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION]));
|
|
|
|
/* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */
|
|
out += snprintf(buf + out, len - out,
|
|
"Lists: Dirty=%s Purge=%s PendingASTs=%s "
|
|
"PendingBASTs=%s\n",
|
|
(list_empty(&dlm->dirty_list) ? "Empty" : "InUse"),
|
|
(list_empty(&dlm->purge_list) ? "Empty" : "InUse"),
|
|
(list_empty(&dlm->pending_asts) ? "Empty" : "InUse"),
|
|
(list_empty(&dlm->pending_basts) ? "Empty" : "InUse"));
|
|
|
|
/* Purge Count: xxx Refs: xxx */
|
|
out += snprintf(buf + out, len - out,
|
|
"Purge Count: %d Refs: %d\n", dlm->purge_count,
|
|
atomic_read(&dlm->dlm_refs.refcount));
|
|
|
|
/* Dead Node: xxx */
|
|
out += snprintf(buf + out, len - out,
|
|
"Dead Node: %d\n", dlm->reco.dead_node);
|
|
|
|
/* What about DLM_RECO_STATE_FINALIZE? */
|
|
if (dlm->reco.state == DLM_RECO_STATE_ACTIVE)
|
|
state = "ACTIVE";
|
|
else
|
|
state = "INACTIVE";
|
|
|
|
/* Recovery Pid: xxxx Master: xxx State: xxxx */
|
|
out += snprintf(buf + out, len - out,
|
|
"Recovery Pid: %d Master: %d State: %s\n",
|
|
task_pid_nr(dlm->dlm_reco_thread_task),
|
|
dlm->reco.new_master, state);
|
|
|
|
/* Recovery Map: xx xx */
|
|
out += snprintf(buf + out, len - out, "Recovery Map: ");
|
|
out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES,
|
|
buf + out, len - out);
|
|
out += snprintf(buf + out, len - out, "\n");
|
|
|
|
/* Recovery Node State: */
|
|
out += snprintf(buf + out, len - out, "Recovery Node State:\n");
|
|
list_for_each_entry(node, &dlm->reco.node_data, list) {
|
|
switch (node->state) {
|
|
case DLM_RECO_NODE_DATA_INIT:
|
|
state = "INIT";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_REQUESTING:
|
|
state = "REQUESTING";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_DEAD:
|
|
state = "DEAD";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_RECEIVING:
|
|
state = "RECEIVING";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_REQUESTED:
|
|
state = "REQUESTED";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_DONE:
|
|
state = "DONE";
|
|
break;
|
|
case DLM_RECO_NODE_DATA_FINALIZE_SENT:
|
|
state = "FINALIZE-SENT";
|
|
break;
|
|
default:
|
|
state = "BAD";
|
|
break;
|
|
}
|
|
out += snprintf(buf + out, len - out, "\t%u - %s\n",
|
|
node->node_num, state);
|
|
}
|
|
|
|
spin_unlock(&dlm->spinlock);
|
|
|
|
return out;
|
|
}
|
|
|
|
static int debug_state_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct dlm_ctxt *dlm = inode->i_private;
|
|
char *buf = NULL;
|
|
|
|
buf = (char *) get_zeroed_page(GFP_NOFS);
|
|
if (!buf)
|
|
goto bail;
|
|
|
|
i_size_write(inode, debug_state_print(dlm, buf, PAGE_SIZE - 1));
|
|
|
|
file->private_data = buf;
|
|
|
|
return 0;
|
|
bail:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static const struct file_operations debug_state_fops = {
|
|
.open = debug_state_open,
|
|
.release = debug_release,
|
|
.read = debug_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
/* end - debug state funcs */
|
|
|
|
/* files in subroot */
|
|
int dlm_debug_init(struct dlm_ctxt *dlm)
|
|
{
|
|
struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
|
|
|
|
/* for dumping dlm_ctxt */
|
|
dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE,
|
|
S_IFREG|S_IRUSR,
|
|
dlm->dlm_debugfs_subroot,
|
|
dlm, &debug_state_fops);
|
|
if (!dc->debug_state_dentry) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
/* for dumping lockres */
|
|
dc->debug_lockres_dentry =
|
|
debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE,
|
|
S_IFREG|S_IRUSR,
|
|
dlm->dlm_debugfs_subroot,
|
|
dlm, &debug_lockres_fops);
|
|
if (!dc->debug_lockres_dentry) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
/* for dumping mles */
|
|
dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE,
|
|
S_IFREG|S_IRUSR,
|
|
dlm->dlm_debugfs_subroot,
|
|
dlm, &debug_mle_fops);
|
|
if (!dc->debug_mle_dentry) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
/* for dumping lockres on the purge list */
|
|
dc->debug_purgelist_dentry =
|
|
debugfs_create_file(DLM_DEBUGFS_PURGE_LIST,
|
|
S_IFREG|S_IRUSR,
|
|
dlm->dlm_debugfs_subroot,
|
|
dlm, &debug_purgelist_fops);
|
|
if (!dc->debug_purgelist_dentry) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
dlm_debug_get(dc);
|
|
return 0;
|
|
|
|
bail:
|
|
dlm_debug_shutdown(dlm);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void dlm_debug_shutdown(struct dlm_ctxt *dlm)
|
|
{
|
|
struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
|
|
|
|
if (dc) {
|
|
debugfs_remove(dc->debug_purgelist_dentry);
|
|
debugfs_remove(dc->debug_mle_dentry);
|
|
debugfs_remove(dc->debug_lockres_dentry);
|
|
debugfs_remove(dc->debug_state_dentry);
|
|
dlm_debug_put(dc);
|
|
}
|
|
}
|
|
|
|
/* subroot - domain dir */
|
|
int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
|
|
{
|
|
dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
|
|
dlm_debugfs_root);
|
|
if (!dlm->dlm_debugfs_subroot) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt),
|
|
GFP_KERNEL);
|
|
if (!dlm->dlm_debug_ctxt) {
|
|
mlog_errno(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
kref_init(&dlm->dlm_debug_ctxt->debug_refcnt);
|
|
|
|
return 0;
|
|
bail:
|
|
dlm_destroy_debugfs_subroot(dlm);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
|
|
{
|
|
debugfs_remove(dlm->dlm_debugfs_subroot);
|
|
}
|
|
|
|
/* debugfs root */
|
|
int dlm_create_debugfs_root(void)
|
|
{
|
|
dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL);
|
|
if (!dlm_debugfs_root) {
|
|
mlog_errno(-ENOMEM);
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void dlm_destroy_debugfs_root(void)
|
|
{
|
|
debugfs_remove(dlm_debugfs_root);
|
|
}
|
|
#endif /* CONFIG_DEBUG_FS */
|