proc.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 618 行 · 第 1/2 页

static void *rxrpc_proc_peers_start(struct seq_file *m, loff_t *_pos)
{
	struct list_head *_p;
	loff_t pos = *_pos;

	/* lock the list against modification */
	down_read(&rxrpc_peers_sem);

	/* allow for the header line */
	if (!pos)
		return SEQ_START_TOKEN;
	pos--;

	/* find the n'th element in the list */
	list_for_each(_p, &rxrpc_peers)
		if (!pos--)
			break;

	return _p != &rxrpc_peers ? _p : NULL;
} /* end rxrpc_proc_peers_start() */

/*****************************************************************************/
/*
 * move to next conn in peers list
 */
static void *rxrpc_proc_peers_next(struct seq_file *p, void *v, loff_t *pos)
{
	struct list_head *_p;

	(*pos)++;

	_p = v;
	_p = (v == SEQ_START_TOKEN) ? rxrpc_peers.next : _p->next;

	return _p != &rxrpc_peers ? _p : NULL;
} /* end rxrpc_proc_peers_next() */

/*****************************************************************************/
/*
 * clean up after reading from the peers list
 */
static void rxrpc_proc_peers_stop(struct seq_file *p, void *v)
{
	up_read(&rxrpc_peers_sem);

} /* end rxrpc_proc_peers_stop() */

/*****************************************************************************/
/*
 * display a header line followed by a load of conn lines
 */
static int rxrpc_proc_peers_show(struct seq_file *m, void *v)
{
	struct rxrpc_peer *peer = list_entry(v, struct rxrpc_peer, proc_link);
	signed long timeout;

	/* display header on line 1 */
	if (v == SEQ_START_TOKEN) {
		seq_puts(m, "LOCAL REMOTE   USAGE CONNS  TIMEOUT"
			 "   MTU RTT(uS)\n");
		return 0;
	}

	/* display one peer per line on subsequent lines */
	timeout = 0;
	if (!list_empty(&peer->timeout.link))
		timeout = (signed long) peer->timeout.timo_jif -
			(signed long) jiffies;

	seq_printf(m, "%5hu %08x %5d %5d %8ld %5Zu %7lu\n",
		   peer->trans->port,
		   ntohl(peer->addr.s_addr),
		   atomic_read(&peer->usage),
		   atomic_read(&peer->conn_count),
		   timeout,
		   peer->if_mtu,
		   (long) peer->rtt
		   );

	return 0;
} /* end rxrpc_proc_peers_show() */

/*****************************************************************************/
/*
 * open "/proc/net/rxrpc/connections" which provides a summary of extant
 * connections
 */
static int rxrpc_proc_conns_open(struct inode *inode, struct file *file)
{
	struct seq_file *m;
	int ret;

	ret = seq_open(file, &rxrpc_proc_conns_ops);
	if (ret < 0)
		return ret;

	m = file->private_data;
	m->private = PDE(inode)->data;

	return 0;
} /* end rxrpc_proc_conns_open() */

/*****************************************************************************/
/*
 * set up the iterator to start reading from the conns list and return the
 * first item
 */
static void *rxrpc_proc_conns_start(struct seq_file *m, loff_t *_pos)
{
	struct list_head *_p;
	loff_t pos = *_pos;

	/* lock the list against modification */
	down_read(&rxrpc_conns_sem);

	/* allow for the header line */
	if (!pos)
		return SEQ_START_TOKEN;
	pos--;

	/* find the n'th element in the list */
	list_for_each(_p, &rxrpc_conns)
		if (!pos--)
			break;

	return _p != &rxrpc_conns ? _p : NULL;
} /* end rxrpc_proc_conns_start() */

/*****************************************************************************/
/*
 * move to next conn in conns list
 */
static void *rxrpc_proc_conns_next(struct seq_file *p, void *v, loff_t *pos)
{
	struct list_head *_p;

	(*pos)++;

	_p = v;
	_p = (v == SEQ_START_TOKEN) ? rxrpc_conns.next : _p->next;

	return _p != &rxrpc_conns ? _p : NULL;
} /* end rxrpc_proc_conns_next() */

/*****************************************************************************/
/*
 * clean up after reading from the conns list
 */
static void rxrpc_proc_conns_stop(struct seq_file *p, void *v)
{
	up_read(&rxrpc_conns_sem);

} /* end rxrpc_proc_conns_stop() */

/*****************************************************************************/
/*
 * display a header line followed by a load of conn lines
 */
static int rxrpc_proc_conns_show(struct seq_file *m, void *v)
{
	struct rxrpc_connection *conn;
	signed long timeout;

	conn = list_entry(v, struct rxrpc_connection, proc_link);

	/* display header on line 1 */
	if (v == SEQ_START_TOKEN) {
		seq_puts(m,
			 "LOCAL REMOTE   RPORT SRVC CONN     END SERIALNO "
			 "CALLNO     MTU  TIMEOUT"
			 "\n");
		return 0;
	}

	/* display one conn per line on subsequent lines */
	timeout = 0;
	if (!list_empty(&conn->timeout.link))
		timeout = (signed long) conn->timeout.timo_jif -
			(signed long) jiffies;

	seq_printf(m,
		   "%5hu %08x %5hu %04hx %08x %-3.3s %08x %08x %5Zu %8ld\n",
		   conn->trans->port,
		   ntohl(conn->addr.sin_addr.s_addr),
		   ntohs(conn->addr.sin_port),
		   ntohs(conn->service_id),
		   ntohl(conn->conn_id),
		   conn->out_clientflag ? "CLT" : "SRV",
		   conn->serial_counter,
		   conn->call_counter,
		   conn->mtu_size,
		   timeout
		   );

	return 0;
} /* end rxrpc_proc_conns_show() */

/*****************************************************************************/
/*
 * open "/proc/net/rxrpc/calls" which provides a summary of extant calls
 */
static int rxrpc_proc_calls_open(struct inode *inode, struct file *file)
{
	struct seq_file *m;
	int ret;

	ret = seq_open(file, &rxrpc_proc_calls_ops);
	if (ret < 0)
		return ret;

	m = file->private_data;
	m->private = PDE(inode)->data;

	return 0;
} /* end rxrpc_proc_calls_open() */

/*****************************************************************************/
/*
 * set up the iterator to start reading from the calls list and return the
 * first item
 */
static void *rxrpc_proc_calls_start(struct seq_file *m, loff_t *_pos)
{
	struct list_head *_p;
	loff_t pos = *_pos;

	/* lock the list against modification */
	down_read(&rxrpc_calls_sem);

	/* allow for the header line */
	if (!pos)
		return SEQ_START_TOKEN;
	pos--;

	/* find the n'th element in the list */
	list_for_each(_p, &rxrpc_calls)
		if (!pos--)
			break;

	return _p != &rxrpc_calls ? _p : NULL;
} /* end rxrpc_proc_calls_start() */

/*****************************************************************************/
/*
 * move to next call in calls list
 */
static void *rxrpc_proc_calls_next(struct seq_file *p, void *v, loff_t *pos)
{
	struct list_head *_p;

	(*pos)++;

	_p = v;
	_p = (v == SEQ_START_TOKEN) ? rxrpc_calls.next : _p->next;

	return _p != &rxrpc_calls ? _p : NULL;
} /* end rxrpc_proc_calls_next() */

/*****************************************************************************/
/*
 * clean up after reading from the calls list
 */
static void rxrpc_proc_calls_stop(struct seq_file *p, void *v)
{
	up_read(&rxrpc_calls_sem);

} /* end rxrpc_proc_calls_stop() */

/*****************************************************************************/
/*
 * display a header line followed by a load of call lines
 */
static int rxrpc_proc_calls_show(struct seq_file *m, void *v)
{
	struct rxrpc_call *call = list_entry(v, struct rxrpc_call, call_link);

	/* display header on line 1 */
	if (v == SEQ_START_TOKEN) {
		seq_puts(m,
			 "LOCAL REMOT SRVC CONN     CALL     DIR USE "
			 " L STATE   OPCODE ABORT    ERRNO\n"
			 );
		return 0;
	}

	/* display one call per line on subsequent lines */
	seq_printf(m,
		   "%5hu %5hu %04hx %08x %08x %s %3u%c"
		   " %c %-7.7s %6d %08x %5d\n",
		   call->conn->trans->port,
		   ntohs(call->conn->addr.sin_port),
		   ntohs(call->conn->service_id),
		   ntohl(call->conn->conn_id),
		   ntohl(call->call_id),
		   call->conn->service ? "SVC" : "CLT",
		   atomic_read(&call->usage),
		   waitqueue_active(&call->waitq) ? 'w' : ' ',
		   call->app_last_rcv ? 'Y' : '-',
		   (call->app_call_state!=RXRPC_CSTATE_ERROR ?
		    rxrpc_call_states7[call->app_call_state] :
		    rxrpc_call_error_states7[call->app_err_state]),
		   call->app_opcode,
		   call->app_abort_code,
		   call->app_errno
		   );

	return 0;
} /* end rxrpc_proc_calls_show() */