Esempio n. 1
0
int
ksocknal_lib_get_conn_addrs (ksock_conn_t *conn)
{ 
        int rc = libcfs_sock_getaddr(conn->ksnc_sock, 1,
                                     &conn->ksnc_ipaddr,
                                     &conn->ksnc_port);

        /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
        LASSERT (!conn->ksnc_closing);

        if (rc != 0) {
                CERROR ("Error %d getting sock peer IP\n", rc);
                return rc;
        }

        rc = libcfs_sock_getaddr(conn->ksnc_sock, 0,
                                 &conn->ksnc_myipaddr, NULL);
        if (rc != 0) {
                CERROR ("Error %d getting sock local IP\n", rc);
                return rc;
        }

        return 0;
}
Esempio n. 2
0
int
lnet_acceptor(void *arg)
{
	socket_t  *newsock;
	int	    rc;
	__u32	  magic;
	__u32	  peer_ip;
	int	    peer_port;
	int	    secure = (int)((long_ptr_t)arg);

	LASSERT(lnet_acceptor_state.pta_sock == NULL);

	cfs_block_allsigs();

	rc = libcfs_sock_listen(&lnet_acceptor_state.pta_sock,
				0, accept_port, accept_backlog);
	if (rc != 0) {
		if (rc == -EADDRINUSE)
			LCONSOLE_ERROR_MSG(0x122, "Can't start acceptor on port %d: port already in use\n",
					   accept_port);
		else
			LCONSOLE_ERROR_MSG(0x123, "Can't start acceptor on port %d: unexpected error %d\n",
					   accept_port, rc);

		lnet_acceptor_state.pta_sock = NULL;
	} else {
		LCONSOLE(0, "Accept %s, port %d\n", accept_type, accept_port);
	}

	/* set init status and unblock parent */
	lnet_acceptor_state.pta_shutdown = rc;
	complete(&lnet_acceptor_state.pta_signal);

	if (rc != 0)
		return rc;

	while (!lnet_acceptor_state.pta_shutdown) {

		rc = libcfs_sock_accept(&newsock, lnet_acceptor_state.pta_sock);
		if (rc != 0) {
			if (rc != -EAGAIN) {
				CWARN("Accept error %d: pausing...\n", rc);
				cfs_pause(cfs_time_seconds(1));
			}
			continue;
		}

		/* maybe we're waken up with libcfs_sock_abort_accept() */
		if (lnet_acceptor_state.pta_shutdown) {
			libcfs_sock_release(newsock);
			break;
		}

		rc = libcfs_sock_getaddr(newsock, 1, &peer_ip, &peer_port);
		if (rc != 0) {
			CERROR("Can't determine new connection's address\n");
			goto failed;
		}

		if (secure && peer_port > LNET_ACCEPTOR_MAX_RESERVED_PORT) {
			CERROR("Refusing connection from %pI4h: insecure port %d\n",
			       &peer_ip, peer_port);
			goto failed;
		}

		rc = libcfs_sock_read(newsock, &magic, sizeof(magic),
				      accept_timeout);
		if (rc != 0) {
			CERROR("Error %d reading connection request from %pI4h\n",
				rc, &peer_ip);
			goto failed;
		}

		rc = lnet_accept(newsock, magic);
		if (rc != 0)
			goto failed;

		continue;

failed:
		libcfs_sock_release(newsock);
	}

	libcfs_sock_release(lnet_acceptor_state.pta_sock);
	lnet_acceptor_state.pta_sock = NULL;

	CDEBUG(D_NET, "Acceptor stopping\n");

	/* unblock lnet_acceptor_stop() */
	complete(&lnet_acceptor_state.pta_signal);
	return 0;
}
Esempio n. 3
0
int
lnet_accept(socket_t *sock, __u32 magic)
{
	lnet_acceptor_connreq_t cr;
	__u32		   peer_ip;
	int		     peer_port;
	int		     rc;
	int		     flip;
	lnet_ni_t	      *ni;
	char		   *str;

	LASSERT(sizeof(cr) <= 16);	     /* not too big for the stack */

	rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
	LASSERT(rc == 0);		      /* we succeeded before */

	if (!lnet_accept_magic(magic, LNET_PROTO_ACCEPTOR_MAGIC)) {

		if (lnet_accept_magic(magic, LNET_PROTO_MAGIC)) {
			/* future version compatibility!
			 * When LNET unifies protocols over all LNDs, the first
			 * thing sent will be a version query.  I send back
			 * LNET_PROTO_ACCEPTOR_MAGIC to tell her I'm "old" */

			memset(&cr, 0, sizeof(cr));
			cr.acr_magic = LNET_PROTO_ACCEPTOR_MAGIC;
			cr.acr_version = LNET_PROTO_ACCEPTOR_VERSION;
			rc = libcfs_sock_write(sock, &cr, sizeof(cr),
					       accept_timeout);

			if (rc != 0)
				CERROR("Error sending magic+version in response to LNET magic from %pI4h: %d\n",
				       &peer_ip, rc);
			return -EPROTO;
		}

		if (magic == le32_to_cpu(LNET_PROTO_TCP_MAGIC))
			str = "'old' socknal/tcpnal";
		else if (lnet_accept_magic(magic, LNET_PROTO_RA_MAGIC))
			str = "'old' ranal";
		else
			str = "unrecognised";

		LCONSOLE_ERROR_MSG(0x11f, "Refusing connection from %pI4h magic %08x: %s acceptor protocol\n",
				   &peer_ip, magic, str);
		return -EPROTO;
	}

	flip = (magic != LNET_PROTO_ACCEPTOR_MAGIC);

	rc = libcfs_sock_read(sock, &cr.acr_version,
			      sizeof(cr.acr_version),
			      accept_timeout);
	if (rc != 0) {
		CERROR("Error %d reading connection request version from %pI4h\n",
			rc, &peer_ip);
		return -EIO;
	}

	if (flip)
		__swab32s(&cr.acr_version);

	if (cr.acr_version != LNET_PROTO_ACCEPTOR_VERSION) {
		/* future version compatibility!
		 * An acceptor-specific protocol rev will first send a version
		 * query.  I send back my current version to tell her I'm
		 * "old". */
		int peer_version = cr.acr_version;

		memset(&cr, 0, sizeof(cr));
		cr.acr_magic = LNET_PROTO_ACCEPTOR_MAGIC;
		cr.acr_version = LNET_PROTO_ACCEPTOR_VERSION;

		rc = libcfs_sock_write(sock, &cr, sizeof(cr),
				       accept_timeout);

		if (rc != 0)
			CERROR("Error sending magic+version in response to version %d from %pI4h: %d\n",
			       peer_version, &peer_ip, rc);
		return -EPROTO;
	}

	rc = libcfs_sock_read(sock, &cr.acr_nid,
			      sizeof(cr) -
			      offsetof(lnet_acceptor_connreq_t, acr_nid),
			      accept_timeout);
	if (rc != 0) {
		CERROR("Error %d reading connection request from %pI4h\n",
			rc, &peer_ip);
		return -EIO;
	}

	if (flip)
		__swab64s(&cr.acr_nid);

	ni = lnet_net2ni(LNET_NIDNET(cr.acr_nid));
	if (ni == NULL ||	       /* no matching net */
	    ni->ni_nid != cr.acr_nid) { /* right NET, wrong NID! */
		if (ni != NULL)
			lnet_ni_decref(ni);
		LCONSOLE_ERROR_MSG(0x120, "Refusing connection from %pI4h for %s: No matching NI\n",
				   &peer_ip, libcfs_nid2str(cr.acr_nid));
		return -EPERM;
	}

	if (ni->ni_lnd->lnd_accept == NULL) {
		/* This catches a request for the loopback LND */
		lnet_ni_decref(ni);
		LCONSOLE_ERROR_MSG(0x121, "Refusing connection from %pI4h for %s: NI doesn not accept IP connections\n",
				  &peer_ip, libcfs_nid2str(cr.acr_nid));
		return -EPERM;
	}

	CDEBUG(D_NET, "Accept %s from %pI4h\n",
	       libcfs_nid2str(cr.acr_nid), &peer_ip);

	rc = ni->ni_lnd->lnd_accept(ni, sock);

	lnet_ni_decref(ni);
	return rc;
}