dlmdebug.c

ocfs1.2.7 源码

		       lock->ast_pending ? 'y' : 'n',
		       list_empty(&lock->bast_list) ? 'y' : 'n',
		       lock->bast_pending ? 'y' : 'n');
		spin_unlock(&lock->spinlock);
	}
}


void dlm_print_one_lock(struct dlm_lock *lockid)
{
	dlm_print_one_lock_resource(lockid->lockres);
}
EXPORT_SYMBOL_GPL(dlm_print_one_lock);

void dlm_dump_lock_resources(struct dlm_ctxt *dlm)
{
	struct dlm_lock_resource *res;
	struct hlist_node *iter;
	struct hlist_head *bucket;
	int i;

	mlog(ML_NOTICE, "struct dlm_ctxt: %s, node=%u, key=%u\n",
		  dlm->name, dlm->node_num, dlm->key);
	if (!dlm || !dlm->name) {
		mlog(ML_ERROR, "dlm=%p\n", dlm);
		return;
	}

	spin_lock(&dlm->spinlock);
	for (i=0; i<DLM_HASH_BUCKETS; i++) {
		bucket = &(dlm->lockres_hash[i]);
		hlist_for_each_entry(res, iter, bucket, hash_node)
			dlm_print_one_lock_resource(res);
	}
	spin_unlock(&dlm->spinlock);
}

static void dlm_dump_purge_list(struct dlm_ctxt *dlm)
{
	struct list_head *iter;
	struct dlm_lock_resource *lockres;

	mlog(ML_NOTICE, "Purge list for DLM Domain \"%s\"\n", dlm->name);
	mlog(ML_NOTICE, "Last_used\tName\n");

	spin_lock(&dlm->spinlock);
	list_for_each(iter, &dlm->purge_list) {
		lockres = list_entry(iter, struct dlm_lock_resource, purge);

		spin_lock(&lockres->spinlock);
		mlog(ML_NOTICE, "%lu\t%.*s\n", lockres->last_used,
		       lockres->lockname.len, lockres->lockname.name);
		spin_unlock(&lockres->spinlock);
	}
	spin_unlock(&dlm->spinlock);
}

static void dlm_dump_work_queue(struct dlm_ctxt *dlm)
{
	struct list_head *iter;
	struct dlm_work_item *item;

	spin_lock(&dlm->work_lock);
	list_for_each(iter, &dlm->work_list) {
		item = list_entry(iter, struct dlm_work_item, list);
		if (item->func == dlm_request_all_locks_worker) {
			printk("%s: found requestalllocks, mas=%u, dead=%u\n",
			       dlm->name, item->u.ral.reco_master,
			       item->u.ral.dead_node);
		} else if (item->func == dlm_mig_lockres_worker) {
			printk("%s:%.*s: found assert_master, realmaster=%u\n",
			       dlm->name, item->u.ml.lockres->lockname.len,
			       item->u.ml.lockres->lockname.name,
			       item->u.ml.real_master);
		} else if (item->func == dlm_assert_master_worker) {
			printk("%s:%.*s: found assert_master, from=%u, "
			       "flags=%u, ignore=%d\n",
			       dlm->name, item->u.am.lockres->lockname.len,
			       item->u.am.lockres->lockname.name,
			       item->u.am.request_from, item->u.am.flags,
			       item->u.am.ignore_higher);
		} else {
			printk("%s: found INVALID work item, func=%p\n",
			       dlm->name, item->func);
		}
	}
	spin_unlock(&dlm->work_lock);
}

static int dlm_dump_work_queues(const char __user *data, unsigned int len)
{
	struct dlm_ctxt *dlm;
	struct list_head *iter;

	spin_lock(&dlm_domain_lock);
	list_for_each(iter, &dlm_domains) {
		dlm = list_entry (iter, struct dlm_ctxt, list);
		dlm_dump_work_queue(dlm);
	}
	spin_unlock(&dlm_domain_lock);
	return len;

}

static int dlm_dump_all_purge_lists(const char __user *data, unsigned int len)
{
	struct dlm_ctxt *dlm;
	struct list_head *iter;

	spin_lock(&dlm_domain_lock);
	list_for_each(iter, &dlm_domains) {
		dlm = list_entry (iter, struct dlm_ctxt, list);
		dlm_dump_purge_list(dlm);
	}
	spin_unlock(&dlm_domain_lock);
	return len;
}

static int dlm_parse_domain_and_lockres(char *buf, unsigned int len,
					struct dlm_ctxt **dlm,
					struct dlm_lock_resource **res)
{
	char *resname;
	char *domainname;
	char *tmp;
	int ret = -EINVAL;

	*dlm = NULL;
	*res = NULL;

	tmp = buf;
	tmp++;
	if (*tmp != ' ') {
		mlog(0, "bad data\n");
		goto leave;
	}
	tmp++;
	domainname = tmp;

	while (*tmp) {
		if (*tmp == ' ')
			break;
		tmp++;
	}
	if (!*tmp || !*(tmp+1)) {
		mlog(0, "bad data\n");
		goto leave;
	}

	*tmp = '\0';  // null term the domainname
	tmp++;
	resname = tmp;
	while (*tmp) {
		if (*tmp == '\n' ||
		    *tmp == ' ' ||
		    *tmp == '\r') {
			*tmp = '\0';
			break;
		}
		tmp++;
	}

	mlog(0, "now looking up domain %s, lockres %s\n",
	       domainname, resname);
	spin_lock(&dlm_domain_lock);
	*dlm = __dlm_lookup_domain(domainname);
	spin_unlock(&dlm_domain_lock);

	if (!dlm_grab(*dlm)) {
		mlog(ML_ERROR, "bad dlm!\n");
		*dlm = NULL;
		goto leave;
	}

	*res = dlm_lookup_lockres(*dlm, resname, strlen(resname));
	if (!*res) {
		mlog(ML_ERROR, "bad lockres!\n");
		dlm_put(*dlm);
		*dlm = NULL;
		goto leave;
	}

	mlog(0, "found dlm=%p, lockres=%p\n", *dlm, *res);
	ret = 0;

leave:
	return ret;
}

static int dlm_trigger_migration(const char __user *data, unsigned int len)
{
	struct dlm_lock_resource *res;
	struct dlm_ctxt *dlm;
	char *buf = NULL;
	int ret = -EINVAL;
	int tmpret;

	if (len >= PAGE_SIZE-1) {
		mlog(ML_ERROR, "user passed too much data: %d bytes\n", len);
		goto leave;
	}
	if (len < 5) {
		mlog(ML_ERROR, "user passed too little data: %d bytes\n", len);
		goto leave;
	}
	buf = kmalloc(len+1, GFP_NOFS);
	if (!buf) {
		mlog(ML_ERROR, "could not alloc %d bytes\n", len+1);
		ret = -ENOMEM;
		goto leave;
	}
	if (strncpy_from_user(buf, data, len) < len) {
		mlog(ML_ERROR, "failed to get all user data.  done.\n");
		goto leave;
	}
	buf[len]='\0';
	mlog(0, "got this data from user: %s\n", buf);

	if (*buf != 'M') {
		mlog(0, "bad data\n");
		goto leave;
	}

	tmpret = dlm_parse_domain_and_lockres(buf, len, &dlm, &res);
	if (tmpret < 0) {
		mlog(0, "bad data\n");
		goto leave;
	}
	tmpret = dlm_migrate_lockres(dlm, res, O2NM_MAX_NODES);
	mlog(0, "dlm_migrate_lockres returned %d\n", tmpret);
	if (tmpret < 0)
		mlog(ML_ERROR, "failed to migrate %.*s: %d\n",
		     res->lockname.len, res->lockname.name, tmpret);
	dlm_lockres_put(res);
	dlm_put(dlm);
	ret = len;

leave:
	if (buf)
		kfree(buf);
	return ret;
}

static const char *dlm_errnames[] = {
	[DLM_NORMAL] =			"DLM_NORMAL",
	[DLM_GRANTED] =			"DLM_GRANTED",
	[DLM_DENIED] =			"DLM_DENIED",
	[DLM_DENIED_NOLOCKS] =		"DLM_DENIED_NOLOCKS",
	[DLM_WORKING] =			"DLM_WORKING",
	[DLM_BLOCKED] =			"DLM_BLOCKED",
	[DLM_BLOCKED_ORPHAN] =		"DLM_BLOCKED_ORPHAN",
	[DLM_DENIED_GRACE_PERIOD] =	"DLM_DENIED_GRACE_PERIOD",
	[DLM_SYSERR] =			"DLM_SYSERR",
	[DLM_NOSUPPORT] =		"DLM_NOSUPPORT",
	[DLM_CANCELGRANT] =		"DLM_CANCELGRANT",
	[DLM_IVLOCKID] =		"DLM_IVLOCKID",
	[DLM_SYNC] =			"DLM_SYNC",
	[DLM_BADTYPE] =			"DLM_BADTYPE",
	[DLM_BADRESOURCE] =		"DLM_BADRESOURCE",
	[DLM_MAXHANDLES] =		"DLM_MAXHANDLES",
	[DLM_NOCLINFO] =		"DLM_NOCLINFO",
	[DLM_NOLOCKMGR] =		"DLM_NOLOCKMGR",
	[DLM_NOPURGED] =		"DLM_NOPURGED",
	[DLM_BADARGS] =			"DLM_BADARGS",
	[DLM_VOID] =			"DLM_VOID",
	[DLM_NOTQUEUED] =		"DLM_NOTQUEUED",
	[DLM_IVBUFLEN] =		"DLM_IVBUFLEN",
	[DLM_CVTUNGRANT] =		"DLM_CVTUNGRANT",
	[DLM_BADPARAM] =		"DLM_BADPARAM",
	[DLM_VALNOTVALID] =		"DLM_VALNOTVALID",
	[DLM_REJECTED] =		"DLM_REJECTED",
	[DLM_ABORT] =			"DLM_ABORT",
	[DLM_CANCEL] =			"DLM_CANCEL",
	[DLM_IVRESHANDLE] =		"DLM_IVRESHANDLE",
	[DLM_DEADLOCK] =		"DLM_DEADLOCK",
	[DLM_DENIED_NOASTS] =		"DLM_DENIED_NOASTS",
	[DLM_FORWARD] =			"DLM_FORWARD",
	[DLM_TIMEOUT] =			"DLM_TIMEOUT",
	[DLM_IVGROUPID] =		"DLM_IVGROUPID",
	[DLM_VERS_CONFLICT] =		"DLM_VERS_CONFLICT",
	[DLM_BAD_DEVICE_PATH] =		"DLM_BAD_DEVICE_PATH",
	[DLM_NO_DEVICE_PERMISSION] =	"DLM_NO_DEVICE_PERMISSION",
	[DLM_NO_CONTROL_DEVICE ] =	"DLM_NO_CONTROL_DEVICE ",
	[DLM_RECOVERING] =		"DLM_RECOVERING",
	[DLM_MIGRATING] =		"DLM_MIGRATING",
	[DLM_MAXSTATS] =		"DLM_MAXSTATS",
};

static const char *dlm_errmsgs[] = {
	[DLM_NORMAL] = 			"request in progress",
	[DLM_GRANTED] = 		"request granted",
	[DLM_DENIED] = 			"request denied",
	[DLM_DENIED_NOLOCKS] = 		"request denied, out of system resources",
	[DLM_WORKING] = 		"async request in progress",
	[DLM_BLOCKED] = 		"lock request blocked",
	[DLM_BLOCKED_ORPHAN] = 		"lock request blocked by a orphan lock",
	[DLM_DENIED_GRACE_PERIOD] = 	"topological change in progress",
	[DLM_SYSERR] = 			"system error",
	[DLM_NOSUPPORT] = 		"unsupported",
	[DLM_CANCELGRANT] = 		"can't cancel convert: already granted",
	[DLM_IVLOCKID] = 		"bad lockid",
	[DLM_SYNC] = 			"synchronous request granted",
	[DLM_BADTYPE] = 		"bad resource type",
	[DLM_BADRESOURCE] = 		"bad resource handle",
	[DLM_MAXHANDLES] = 		"no more resource handles",
	[DLM_NOCLINFO] = 		"can't contact cluster manager",
	[DLM_NOLOCKMGR] = 		"can't contact lock manager",
	[DLM_NOPURGED] = 		"can't contact purge daemon",
	[DLM_BADARGS] = 		"bad api args",
	[DLM_VOID] = 			"no status",
	[DLM_NOTQUEUED] = 		"NOQUEUE was specified and request failed",
	[DLM_IVBUFLEN] = 		"invalid resource name length",
	[DLM_CVTUNGRANT] = 		"attempted to convert ungranted lock",
	[DLM_BADPARAM] = 		"invalid lock mode specified",
	[DLM_VALNOTVALID] = 		"value block has been invalidated",
	[DLM_REJECTED] = 		"request rejected, unrecognized client",
	[DLM_ABORT] = 			"blocked lock request cancelled",
	[DLM_CANCEL] = 			"conversion request cancelled",
	[DLM_IVRESHANDLE] = 		"invalid resource handle",
	[DLM_DEADLOCK] = 		"deadlock recovery refused this request",
	[DLM_DENIED_NOASTS] = 		"failed to allocate AST",
	[DLM_FORWARD] = 		"request must wait for primary's response",
	[DLM_TIMEOUT] = 		"timeout value for lock has expired",
	[DLM_IVGROUPID] = 		"invalid group specification",
	[DLM_VERS_CONFLICT] = 		"version conflicts prevent request handling",
	[DLM_BAD_DEVICE_PATH] = 	"Locks device does not exist or path wrong",
	[DLM_NO_DEVICE_PERMISSION] = 	"Client has insufficient perms for device",
	[DLM_NO_CONTROL_DEVICE] = 	"Cannot set options on opened device ",
	[DLM_RECOVERING] = 		"lock resource being recovered",
	[DLM_MIGRATING] = 		"lock resource being migrated",
	[DLM_MAXSTATS] = 		"invalid error number",
};


const char *dlm_errmsg(enum dlm_status err)
{
	if (err >= DLM_MAXSTATS || err < 0)
		return dlm_errmsgs[DLM_MAXSTATS];
	return dlm_errmsgs[err];
}
EXPORT_SYMBOL_GPL(dlm_errmsg);

const char *dlm_errname(enum dlm_status err)
{
	if (err >= DLM_MAXSTATS || err < 0)
		return dlm_errnames[DLM_MAXSTATS];
	return dlm_errnames[err];
}
EXPORT_SYMBOL_GPL(dlm_errname);