Commit c9866a54 authored by Chris Leech's avatar Chris Leech Committed by James Bottomley
Browse files

[SCSI] libfc: Register Symbolic Port Name (RSPN_ID) 



Register the fc_host symbolic name as the symbolic port name
with the fabric name server.

Signed-off-by: default avatarChris Leech <christopher.leech@intel.com>
Signed-off-by: default avatarRobert Love <robert.w.love@intel.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 5baa17c3

drivers/scsi/libfc/fc_lport.c

+90 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ static void fc_lport_enter_flogi(struct fc_lport *); 
static void fc_lport_enter_dns(struct fc_lport *);

static void fc_lport_enter_rnn_id(struct fc_lport *);

static void fc_lport_enter_rsnn_nn(struct fc_lport *);

static void fc_lport_enter_rspn_id(struct fc_lport *);

static void fc_lport_enter_rft_id(struct fc_lport *);

static void fc_lport_enter_scr(struct fc_lport *);

static void fc_lport_enter_ready(struct fc_lport *);
@@ -121,6 +122,7 @@ static const char *fc_lport_state_names[] = { 
	[LPORT_ST_DNS] =      "dNS",

	[LPORT_ST_RNN_ID] =   "RNN_ID",

	[LPORT_ST_RSNN_NN] =  "RSNN_NN",

	[LPORT_ST_RSPN_ID] =  "RSPN_ID",

	[LPORT_ST_RFT_ID] =   "RFT_ID",

	[LPORT_ST_SCR] =      "SCR",

	[LPORT_ST_READY] =    "Ready",
@@ -969,6 +971,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 
			case LPORT_ST_RESET:

			case LPORT_ST_RNN_ID:

			case LPORT_ST_RSNN_NN:

			case LPORT_ST_RSPN_ID:

			case LPORT_ST_RFT_ID:

			case LPORT_ST_SCR:

			case LPORT_ST_DNS:
@@ -1035,6 +1038,59 @@ static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, 
	mutex_unlock(&lport->lp_mutex);

}



/**

 * fc_lport_rspn_id_resp() - Handle response to Register Symbolic Port Name

 *			     by ID (RSPN_ID) request

 * @sp: current sequence in RSPN_ID exchange

 * @fp: response frame

 * @lp_arg: Fibre Channel host port instance

 *

 * Locking Note: This function will be called without the lport lock

 * held, but it will lock, call an _enter_* function or fc_lport_error

 * and then unlock the lport.

 */

static void fc_lport_rspn_id_resp(struct fc_seq *sp, struct fc_frame *fp,

				  void *lp_arg)

{

	struct fc_lport *lport = lp_arg;

	struct fc_frame_header *fh;

	struct fc_ct_hdr *ct;



	FC_LPORT_DBG(lport, "Received a RSPN_ID %s\n", fc_els_resp_type(fp));



	if (fp == ERR_PTR(-FC_EX_CLOSED))

		return;



	mutex_lock(&lport->lp_mutex);



	if (lport->state != LPORT_ST_RSPN_ID) {

		FC_LPORT_DBG(lport, "Received a RSPN_ID response, but in state "

			     "%s\n", fc_lport_state(lport));

		if (IS_ERR(fp))

			goto err;

		goto out;

	}



	if (IS_ERR(fp)) {

		fc_lport_error(lport, fp);

		goto err;

	}



	fh = fc_frame_header_get(fp);

	ct = fc_frame_payload_get(fp, sizeof(*ct));

	if (fh && ct && fh->fh_type == FC_TYPE_CT &&

	    ct->ct_fs_type == FC_FST_DIR &&

	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&

	    ntohs(ct->ct_cmd) == FC_FS_ACC)

		fc_lport_enter_rspn_id(lport);

	else

		fc_lport_error(lport, fp);



out:

	fc_frame_free(fp);

err:

	mutex_unlock(&lport->lp_mutex);

}

/**

 * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name

 *			     by Node Name (RSNN_NN) request
@@ -1260,6 +1316,37 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport) 
		fc_lport_error(lport, fp);

}



/**

 * fc_rport_enter_rspn_id() - Register symbolic port name with the name server

 * @lport: Fibre Channel local port to register

 *

 * Locking Note: The lport lock is expected to be held before calling

 * this routine.

 */

static void fc_lport_enter_rspn_id(struct fc_lport *lport)

{

	struct fc_frame *fp;

	size_t len;



	FC_LPORT_DBG(lport, "Entered RSPN_ID state from %s state\n",

		     fc_lport_state(lport));



	fc_lport_state_enter(lport, LPORT_ST_RSPN_ID);



	len = strnlen(fc_host_symbolic_name(lport->host), 255);

	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +

			    sizeof(struct fc_ns_rspn) + len);

	if (!fp) {

		fc_lport_error(lport, fp);

		return;

	}



	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,

				  fc_lport_rspn_id_resp,

				  lport, lport->e_d_tov))

		fc_lport_error(lport, fp);

}



/**

 * fc_rport_enter_rsnn_nn() - Register symbolic node name with the name server

 * @lport: Fibre Channel local port to register
@@ -1387,6 +1474,9 @@ static void fc_lport_timeout(struct work_struct *work) 
	case LPORT_ST_RSNN_NN:

		fc_lport_enter_rsnn_nn(lport);

		break;

	case LPORT_ST_RSPN_ID:

		fc_lport_enter_rspn_id(lport);

		break;

	case LPORT_ST_RFT_ID:

		fc_lport_enter_rft_id(lport);

		break;

include/scsi/fc/fc_ns.h

+10 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ enum fc_ns_req { 
	FC_NS_RFT_ID =	0x0217,		/* reg FC4 type for ID */

	FC_NS_RPN_ID =	0x0212,		/* reg port name for ID */

	FC_NS_RNN_ID =	0x0213,		/* reg node name for ID */

	FC_NS_RSPN_ID =	0x0218,		/* reg symbolic port name */

	FC_NS_RSNN_NN =	0x0239,		/* reg symbolic node name */

};
@@ -166,4 +167,13 @@ struct fc_ns_rsnn { 
	char		fr_name[];

} __attribute__((__packed__));



/*

 * RSPN_ID request - register symbolic port name

 */

struct fc_ns_rspn {

	struct fc_ns_fid fr_fid;	/* port ID object */

	__u8		fr_name_len;

	char		fr_name[];

} __attribute__((__packed__));



#endif /* _FC_NS_H_ */

include/scsi/fc_encode.h

+11 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ struct fc_ct_req { 
		struct fc_ns_rft rft;

		struct fc_ns_fid fid;

		struct fc_ns_rsnn snn;

		struct fc_ns_rspn spn;

	} payload;

};
@@ -137,6 +138,16 @@ static inline int fc_ct_fill(struct fc_lport *lport, 
		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);

		break;



	case FC_NS_RSPN_ID:

		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rspn));

		hton24(ct->payload.spn.fr_fid.fp_fid,

		       fc_host_port_id(lport->host));

		strncpy(ct->payload.spn.fr_name,

			fc_host_symbolic_name(lport->host), 255);

		ct->payload.spn.fr_name_len =

			strnlen(ct->payload.spn.fr_name, 255);

		break;



	case FC_NS_RSNN_NN:

		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn));

		put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);

include/scsi/libfc.h

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ enum fc_lport_state { 
	LPORT_ST_DNS,

	LPORT_ST_RNN_ID,

	LPORT_ST_RSNN_NN,

	LPORT_ST_RSPN_ID,

	LPORT_ST_RFT_ID,

	LPORT_ST_SCR,

	LPORT_ST_READY,