dlmdebug.c

来自「ocfs1.4.1 oracle分布式文件系统」· C语言 代码 · 共 1,038 行 · 第 1/2 页

			"Total on list: %ld\n", total);
	return out;
}

static int debug_mle_open(struct inode *inode, struct file *file)
{
	struct dlm_ctxt *dlm = inode->i_private;
	struct debug_buffer *db;

	db = debug_buffer_allocate();
	if (!db)
		goto bail;

	db->len = debug_mle_print(dlm, db);

	file->private_data = db;

	return 0;
bail:
	return -ENOMEM;
}

static struct file_operations debug_mle_fops = {
	.open =		debug_mle_open,
	.release =	debug_buffer_release,
	.read =		debug_buffer_read,
	.llseek =	debug_buffer_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 *res = NULL;

	spin_lock(&dlm->spinlock);

	if (dl->dl_res) {
		list_for_each_entry(res, &dl->dl_res->tracking, tracking) {
			if (dl->dl_res) {
				dlm_lockres_put(dl->dl_res);
				dl->dl_res = NULL;
			}
			if (&res->tracking == &dlm->tracking_list) {
				mlog(0, "End of list found, %p\n", res);
				dl = NULL;
				break;
			}
			dlm_lockres_get(res);
			dl->dl_res = res;
			break;
		}
	} else {
		if (!list_empty(&dlm->tracking_list)) {
			list_for_each_entry(res, &dlm->tracking_list, tracking)
				break;
			dlm_lockres_get(res);
			dl->dl_res = res;
		} else
			dl = NULL;
	}

	if (dl) {
		spin_lock(&dl->dl_res->spinlock);
		dump_lockres(dl->dl_res, dl->dl_buf, dl->dl_len - 1);
		spin_unlock(&dl->dl_res->spinlock);
	}

	spin_unlock(&dlm->spinlock);

	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 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 = (struct seq_file *) 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 = (struct seq_file *)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 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, struct debug_buffer *db)
{
	int out = 0;
	struct dlm_reco_node_data *node;
	char *state;
	int lres, rres, ures, tres;

	lres = atomic_read(&dlm->local_resources);
	rres = atomic_read(&dlm->remote_resources);
	ures = atomic_read(&dlm->unknown_resources);
	tres = lres + rres + ures;

	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(db->buf + out, db->len - out,
			"Domain: %s  Key: 0x%08x\n", dlm->name, dlm->key);

	/* Thread Pid: xxx  Node: xxx  State: xxxxx */
	out += snprintf(db->buf + out, db->len - out,
			"Thread Pid: %d  Node: %d  State: %s\n",
			dlm->dlm_thread_task->pid, dlm->node_num, state);

	/* Number of Joins: xxx  Joining Node: xxx */
	out += snprintf(db->buf + out, db->len - out,
			"Number of Joins: %d  Joining Node: %d\n",
			dlm->num_joins, dlm->joining_node);

	/* Domain Map: xx xx xx */
	out += snprintf(db->buf + out, db->len - out, "Domain Map: ");
	out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES,
				 db->buf + out, db->len - out);
	out += snprintf(db->buf + out, db->len - out, "\n");

	/* Live Map: xx xx xx */
	out += snprintf(db->buf + out, db->len - out, "Live Map: ");
	out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES,
				 db->buf + out, db->len - out);
	out += snprintf(db->buf + out, db->len - out, "\n");

	/* Mastered Resources Total: xxx  Locally: xxx  Remotely: ... */
	out += snprintf(db->buf + out, db->len - out,
			"Mastered Resources Total: %d  Locally: %d  "
			"Remotely: %d  Unknown: %d\n",
			tres, lres, rres, ures);

	/* Lists: Dirty=Empty  Purge=InUse  PendingASTs=Empty  ... */
	out += snprintf(db->buf + out, db->len - out,
			"Lists: Dirty=%s  Purge=%s  PendingASTs=%s  "
			"PendingBASTs=%s  Master=%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"),
			(list_empty(&dlm->master_list) ? "Empty" : "InUse"));

	/* Purge Count: xxx  Refs: xxx */
	out += snprintf(db->buf + out, db->len - out,
			"Purge Count: %d  Refs: %d\n", dlm->purge_count,
			atomic_read(&dlm->dlm_refs.refcount));

	/* Dead Node: xxx */
	out += snprintf(db->buf + out, db->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(db->buf + out, db->len - out,
			"Recovery Pid: %d  Master: %d  State: %s\n",
			dlm->dlm_reco_thread_task->pid,
			dlm->reco.new_master, state);

	/* Recovery Map: xx xx */
	out += snprintf(db->buf + out, db->len - out, "Recovery Map: ");
	out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES,
				 db->buf + out, db->len - out);
	out += snprintf(db->buf + out, db->len - out, "\n");

	/* Recovery Node State: */
	out += snprintf(db->buf + out, db->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(db->buf + out, db->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;
	struct debug_buffer *db = NULL;

	db = debug_buffer_allocate();
	if (!db)
		goto bail;

	db->len = debug_state_print(dlm, db);

	file->private_data = db;

	return 0;
bail:
	return -ENOMEM;
}

static struct file_operations debug_state_fops = {
	.open =		debug_state_open,
	.release =	debug_buffer_release,
	.read =		debug_buffer_read,
	.llseek =	debug_buffer_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) {
		if (dc->debug_purgelist_dentry)
			debugfs_remove(dc->debug_purgelist_dentry);
		if (dc->debug_mle_dentry)
			debugfs_remove(dc->debug_mle_dentry);
		if (dc->debug_lockres_dentry)
			debugfs_remove(dc->debug_lockres_dentry);
		if (dc->debug_state_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)
{
	if (dlm->dlm_debugfs_subroot)
		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)
{
	if (dlm_debugfs_root)
		debugfs_remove(dlm_debugfs_root);
}
#endif	/* CONFIG_DEBUG_FS */