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896 lines
25 KiB
896 lines
25 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* -*- 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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|
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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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|
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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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|
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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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kref_read(&lock->lock_refs), |
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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 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, kref_read(&res->refs), |
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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_entry(lock, &res->granted, 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_entry(lock, &res->converting, 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_entry(lock, &res->blocked, 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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|
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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 += scnprintf(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 += scnprintf(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 += scnprintf(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 += scnprintf(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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kref_read(&mle->mle_refs)); |
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out += scnprintf(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 += scnprintf(buf + out, len - out, "\n"); |
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out += scnprintf(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 += scnprintf(buf + out, len - out, "\n"); |
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out += scnprintf(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 += scnprintf(buf + out, len - out, "\n"); |
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out += scnprintf(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 += scnprintf(buf + out, len - out, "\n"); |
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out += scnprintf(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_ATOMIC); |
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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; |
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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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/* begin - utils funcs */ |
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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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/* 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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{ |
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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 += scnprintf(buf + out, len - out, |
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"Dumping Purgelist for Domain: %s\n", dlm->name); |
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spin_lock(&dlm->spinlock); |
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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 += scnprintf(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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out += scnprintf(buf + out, len - out, "Total on list: %lu\n", total); |
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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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{ |
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struct dlm_ctxt *dlm = inode->i_private; |
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char *buf = NULL; |
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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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i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1)); |
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file->private_data = buf; |
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return 0; |
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bail: |
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return -ENOMEM; |
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} |
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static const struct file_operations debug_purgelist_fops = { |
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.open = debug_purgelist_open, |
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.release = debug_release, |
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.read = debug_read, |
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.llseek = generic_file_llseek, |
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}; |
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/* end - purge list funcs */ |
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|
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/* begin - debug mle funcs */ |
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static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len) |
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{ |
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struct dlm_master_list_entry *mle; |
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struct hlist_head *bucket; |
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int i, out = 0; |
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unsigned long total = 0, longest = 0, bucket_count = 0; |
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|
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out += scnprintf(buf + out, len - out, |
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"Dumping MLEs for Domain: %s\n", dlm->name); |
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|
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spin_lock(&dlm->master_lock); |
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for (i = 0; i < DLM_HASH_BUCKETS; i++) { |
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bucket = dlm_master_hash(dlm, i); |
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hlist_for_each_entry(mle, bucket, master_hash_node) { |
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++total; |
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++bucket_count; |
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if (len - out < 200) |
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continue; |
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out += dump_mle(mle, buf + out, len - out); |
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} |
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longest = max(longest, bucket_count); |
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bucket_count = 0; |
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} |
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spin_unlock(&dlm->master_lock); |
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|
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out += scnprintf(buf + out, len - out, |
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"Total: %lu, Longest: %lu\n", total, longest); |
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return out; |
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} |
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|
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static int debug_mle_open(struct inode *inode, struct file *file) |
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{ |
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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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i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1)); |
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file->private_data = buf; |
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|
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return 0; |
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bail: |
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return -ENOMEM; |
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} |
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|
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static const struct file_operations debug_mle_fops = { |
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.open = debug_mle_open, |
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.release = debug_release, |
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.read = debug_read, |
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.llseek = generic_file_llseek, |
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}; |
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|
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/* end - debug mle funcs */ |
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|
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/* begin - debug lockres funcs */ |
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static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len) |
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{ |
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int out; |
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|
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#define DEBUG_LOCK_VERSION 1 |
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spin_lock(&lock->spinlock); |
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out = scnprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d," |
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"%d,%d,%d,%d\n", |
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DEBUG_LOCK_VERSION, |
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list_type, lock->ml.type, lock->ml.convert_type, |
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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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!list_empty(&lock->ast_list), |
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!list_empty(&lock->bast_list), |
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lock->ast_pending, lock->bast_pending, |
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lock->convert_pending, lock->lock_pending, |
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lock->cancel_pending, lock->unlock_pending, |
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kref_read(&lock->lock_refs)); |
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spin_unlock(&lock->spinlock); |
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|
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return out; |
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} |
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|
|
static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len) |
|
{ |
|
struct dlm_lock *lock; |
|
int i; |
|
int out = 0; |
|
|
|
out += scnprintf(buf + out, len - out, "NAME:"); |
|
out += stringify_lockname(res->lockname.name, res->lockname.len, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
#define DEBUG_LRES_VERSION 1 |
|
out += scnprintf(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), |
|
kref_read(&res->refs)); |
|
|
|
/* refmap */ |
|
out += scnprintf(buf + out, len - out, "RMAP:"); |
|
out += stringify_nodemap(res->refmap, O2NM_MAX_NODES, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
/* lvb */ |
|
out += scnprintf(buf + out, len - out, "LVBX:"); |
|
for (i = 0; i < DLM_LVB_LEN; i++) |
|
out += scnprintf(buf + out, len - out, |
|
"%02x", (unsigned char)res->lvb[i]); |
|
out += scnprintf(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 += scnprintf(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; |
|
struct debug_lockres *dl; |
|
void *buf; |
|
|
|
buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
|
if (!buf) |
|
goto bail; |
|
|
|
dl = __seq_open_private(file, &debug_lockres_ops, sizeof(*dl)); |
|
if (!dl) |
|
goto bailfree; |
|
|
|
dl->dl_len = PAGE_SIZE; |
|
dl->dl_buf = buf; |
|
|
|
dlm_grab(dlm); |
|
dl->dl_ctxt = dlm; |
|
|
|
return 0; |
|
|
|
bailfree: |
|
kfree(buf); |
|
bail: |
|
mlog_errno(-ENOMEM); |
|
return -ENOMEM; |
|
} |
|
|
|
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 += scnprintf(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 += scnprintf(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 += scnprintf(buf + out, len - out, |
|
"Number of Joins: %d Joining Node: %d\n", |
|
dlm->num_joins, dlm->joining_node); |
|
|
|
/* Domain Map: xx xx xx */ |
|
out += scnprintf(buf + out, len - out, "Domain Map: "); |
|
out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
/* Exit Domain Map: xx xx xx */ |
|
out += scnprintf(buf + out, len - out, "Exit Domain Map: "); |
|
out += stringify_nodemap(dlm->exit_domain_map, O2NM_MAX_NODES, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
/* Live Map: xx xx xx */ |
|
out += scnprintf(buf + out, len - out, "Live Map: "); |
|
out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
/* Lock Resources: xxx (xxx) */ |
|
out += scnprintf(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 += scnprintf(buf + out, len - out, |
|
"MLEs: %d (%d)\n", cur_mles, tot_mles); |
|
|
|
/* Blocking: xxx (xxx) */ |
|
out += scnprintf(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 += scnprintf(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 += scnprintf(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 += scnprintf(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 += scnprintf(buf + out, len - out, |
|
"Purge Count: %d Refs: %d\n", dlm->purge_count, |
|
kref_read(&dlm->dlm_refs)); |
|
|
|
/* Dead Node: xxx */ |
|
out += scnprintf(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 += scnprintf(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 += scnprintf(buf + out, len - out, "Recovery Map: "); |
|
out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, |
|
buf + out, len - out); |
|
out += scnprintf(buf + out, len - out, "\n"); |
|
|
|
/* Recovery Node State: */ |
|
out += scnprintf(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 += scnprintf(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 */ |
|
void dlm_debug_init(struct dlm_ctxt *dlm) |
|
{ |
|
/* for dumping dlm_ctxt */ |
|
debugfs_create_file(DLM_DEBUGFS_DLM_STATE, S_IFREG|S_IRUSR, |
|
dlm->dlm_debugfs_subroot, dlm, &debug_state_fops); |
|
|
|
/* for dumping lockres */ |
|
debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE, S_IFREG|S_IRUSR, |
|
dlm->dlm_debugfs_subroot, dlm, &debug_lockres_fops); |
|
|
|
/* for dumping mles */ |
|
debugfs_create_file(DLM_DEBUGFS_MLE_STATE, S_IFREG|S_IRUSR, |
|
dlm->dlm_debugfs_subroot, dlm, &debug_mle_fops); |
|
|
|
/* for dumping lockres on the purge list */ |
|
debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, S_IFREG|S_IRUSR, |
|
dlm->dlm_debugfs_subroot, dlm, |
|
&debug_purgelist_fops); |
|
} |
|
|
|
/* subroot - domain dir */ |
|
void dlm_create_debugfs_subroot(struct dlm_ctxt *dlm) |
|
{ |
|
dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name, |
|
dlm_debugfs_root); |
|
} |
|
|
|
void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) |
|
{ |
|
debugfs_remove_recursive(dlm->dlm_debugfs_subroot); |
|
} |
|
|
|
/* debugfs root */ |
|
void dlm_create_debugfs_root(void) |
|
{ |
|
dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL); |
|
} |
|
|
|
void dlm_destroy_debugfs_root(void) |
|
{ |
|
debugfs_remove(dlm_debugfs_root); |
|
} |
|
#endif /* CONFIG_DEBUG_FS */
|
|
|