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[fc] Add support for Fibre Channel name server lookups 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2010-11-04 03:31:15 +00:00
parent 41231fda9c
commit 8e718df5e1
5 changed files with 585 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/include/ipxe/errfile.h
View File

@ -189,6 +189,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_fcels ( ERRFILE_NET | 0x002c0000 )
#define ERRFILE_fcp ( ERRFILE_NET | 0x002d0000 )
#define ERRFILE_fcoe ( ERRFILE_NET | 0x002e0000 )
#define ERRFILE_fcns ( ERRFILE_NET | 0x002f0000 )
#define ERRFILE_image ( ERRFILE_IMAGE | 0x00000000 )
#define ERRFILE_elf ( ERRFILE_IMAGE | 0x00010000 )

7
src/include/ipxe/fc.h
View File

@ -64,6 +64,7 @@ struct sockaddr_fc {
extern struct fc_port_id fc_empty_port_id;
extern struct fc_port_id fc_f_port_id;
extern struct fc_port_id fc_gs_port_id;
extern struct fc_port_id fc_ptp_low_port_id;
extern struct fc_port_id fc_ptp_high_port_id;
@ -190,6 +191,7 @@ enum fc_type {
FC_TYPE_BLS = 0x00, /**< Basic Link Service */
FC_TYPE_ELS = 0x01, /**< Extended Link Service */
FC_TYPE_FCP = 0x08, /**< Fibre Channel Protocol */
FC_TYPE_CT = 0x20, /**< Common Transport */
};
/** Fibre Channel Frame Control - Exchange and Sequence */
@ -277,6 +279,9 @@ struct fc_port {
/** Link port ID (for point-to-point links only) */
struct fc_port_id ptp_link_port_id;
/** Name server PLOGI interface */
struct interface ns_plogi;
/** List of active exchanges */
struct list_head xchgs;
};
@ -285,6 +290,8 @@ struct fc_port {
enum fc_port_flags {
/** Port is attached to a fabric */
FC_PORT_HAS_FABRIC = 0x0001,
/** Port is logged in to a name server */
FC_PORT_HAS_NS = 0x0002,
};
/**

217
src/include/ipxe/fcns.h Normal file
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@ -0,0 +1,217 @@
#ifndef _IPXE_FCNS_H
#define _IPXE_FCNS_H
/**
* @file
*
* Fibre Channel name server lookups
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <ipxe/fc.h>
/** A Fibre Channel Common Transport header */
struct fc_ct_header {
/** Revision */
uint8_t revision;
/** Original requestor ID */
struct fc_port_id in_id;
/** Generic service type */
uint8_t type;
/** Generic service subtype */
uint8_t subtype;
/** Options */
uint8_t options;
/** Reserved */
uint8_t reserved;
/** Command/response code */
uint16_t code;
/** Maximum/residual size */
uint16_t size;
/** Fragment ID */
uint8_t fragment;
/** Reason code */
uint8_t reason;
/** Reason code explanation */
uint8_t explanation;
/** Vendor specific */
uint8_t vendor;
} __attribute__ (( packed ));
/** Fibre Channel Common Transport revision */
#define FC_CT_REVISION 1
/** Fibre Channel generic service type */
enum fc_gs_type {
/** Directory service */
FC_GS_TYPE_DS = 0xfc,
};
/** Fibre Channel generic service response codes */
enum fc_gs_response_code {
/** Accepted */
FC_GS_ACCEPT = 0x8002,
/** Rejected */
FC_GS_REJECT = 0x8001,
};
/** Fibre Channel generic service rejection reason codes */
enum fc_gs_reason_code {
/** Invalid command code */
FC_GS_BAD_COMMAND = 0x01,
/** Invalid version level */
FC_GS_BAD_VERSION = 0x02,
/** Logical error */
FC_GS_ERROR = 0x03,
/** Invalid CT_IU size */
FC_GS_BAD_SIZE = 0x04,
/** Logical busy */
FC_GS_BUSY = 0x05,
/** Protocol error */
FC_GS_EPROTO = 0x07,
/** Unable to perform command request */
FC_GS_UNABLE = 0x09,
/** Command not supported */
FC_GS_ENOTSUP = 0x0b,
/** Server not available */
FC_GS_UNAVAILABLE = 0x0d,
/** Session could not be established */
FC_GS_SESSION = 0x0e,
};
/** Fibre Channel directory service subtype */
enum fc_ds_subtype {
/** Name server */
FC_DS_SUBTYPE_NAME = 0x02,
};
/** Fibre Channel name server commands */
enum fc_ns_command_nibble {
/** Get */
FC_NS_GET = 0x1,
/** Register */
FC_NS_REGISTER = 0x2,
/** De-register */
FC_NS_DEREGISTER = 0x3,
};
/** Fibre Channel name server objects */
enum fc_ns_object_nibble {
/** Port ID */
FC_NS_PORT_ID = 0x1,
/** Port name */
FC_NS_PORT_NAME = 0x2,
/** Node name */
FC_NS_NODE_NAME = 0x3,
/** FC-4 types */
FC_NS_FC4_TYPES = 0x7,
/** Symbolic port name */
FC_NS_SYM_PORT_NAME = 0x8,
/** Symbolic node name */
FC_NS_SYM_NODE_NAME = 0x9,
/** FC-4 features */
FC_NS_FC4_FEATURES = 0xf,
};
/** Construct Fibre Channel name server command code
*
* @v command Name server command
* @v key Name server key
* @v value Name server value
* @ret code Name server command code
*/
#define FC_NS_CODE( command, key, value ) \
( ( (command) << 8 ) | ( (key) << 4 ) | ( (value) << 0 ) )
/** Construct Fibre Channel name server "get" command code
*
* @v key Name server key
* @v value Name server value to get
* @ret code Name server command code
*/
#define FC_NS_GET( key, value ) FC_NS_CODE ( FC_NS_GET, key, value )
/** Construct Fibre Channel name server "register" command code
*
* @v key Name server key
* @v value Name server value to register
* @ret code Name server command code
*/
#define FC_NS_REGISTER( key, value ) FC_NS_CODE ( FC_NS_REGISTER, key, value )
/** Extract Fibre Channel name server command
*
* @v code Name server command code
* @ret command Name server command
*/
#define FC_NS_COMMAND( code ) ( ( (code) >> 8 ) & 0xf )
/** Extract Fibre Channel name server key
*
* @v code Name server command code
* @ret key Name server key
*/
#define FC_NS_KEY( code ) ( ( (code) >> 4 ) & 0xf )
/** Extract Fibre Channel name server value
*
* @v code Name server command code
* @ret value NAme server value
*/
#define FC_NS_VALUE( code ) ( ( (code) >> 0 ) & 0xf )
/** A Fibre Channel name server port ID */
struct fc_ns_port_id {
/** Reserved */
uint8_t reserved;
/** Port ID */
struct fc_port_id port_id;
} __attribute__ (( packed ));
/** A Fibre Channel name server GID_PN request */
struct fc_ns_gid_pn_request {
/** Common Transport header */
struct fc_ct_header ct;
/** Port name */
struct fc_name port_wwn;
} __attribute__ (( packed ));
/** A Fibre Channel name server request */
union fc_ns_request {
/** Get ID by port name */
struct fc_ns_gid_pn_request gid_pn;
};
/** A Fibre Channel name server rejection response */
struct fc_ns_reject_response {
/** Common Transport header */
struct fc_ct_header ct;
} __attribute__ (( packed ));
/** A Fibre Channel name server GID_PN response */
struct fc_ns_gid_pn_response {
/** Common Transport header */
struct fc_ct_header ct;
/** Port ID */
struct fc_ns_port_id port_id;
} __attribute__ (( packed ));
/** A Fibre Channel name server response */
union fc_ns_response {
/** Common Transport header */
struct fc_ct_header ct;
/** Rejection */
struct fc_ns_reject_response reject;
/** Get ID by port name */
struct fc_ns_gid_pn_response gid_pn;
};
extern int fc_ns_query ( struct fc_peer *peer, struct fc_port *port,
int ( * done ) ( struct fc_peer *peer,
struct fc_port *port,
struct fc_port_id *peer_port_id ) );
#endif /* _IPXE_FCNS_H */

158
src/net/fc.c
View File

@ -35,6 +35,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/iobuf.h>
#include <ipxe/fc.h>
#include <ipxe/fcels.h>
#include <ipxe/fcns.h>
/** @file
*
@ -61,6 +62,9 @@ struct fc_port_id fc_empty_port_id = { .bytes = { 0x00, 0x00, 0x00 } };
/** F_Port contoller port ID */
struct fc_port_id fc_f_port_id = { .bytes = { 0xff, 0xff, 0xfe } };
/** Generic services port ID */
struct fc_port_id fc_gs_port_id = { .bytes = { 0xff, 0xff, 0xfc } };
/** Point-to-point low port ID */
struct fc_port_id fc_ptp_low_port_id = { .bytes = { 0x01, 0x01, 0x01 } };
@ -464,14 +468,24 @@ static int fc_xchg_tx ( struct fc_exchange *xchg, struct io_buffer *iobuf,
}
/* Calculate routing control */
if ( xchg->type == FC_TYPE_ELS ) {
switch ( xchg->type ) {
case FC_TYPE_ELS:
r_ctl = FC_R_CTL_ELS;
if ( meta->flags & XFER_FL_RESPONSE ) {
r_ctl |= FC_R_CTL_SOL_CTRL;
} else {
r_ctl |= FC_R_CTL_UNSOL_CTRL;
}
} else {
break;
case FC_TYPE_CT:
r_ctl = FC_R_CTL_DATA;
if ( meta->flags & XFER_FL_RESPONSE ) {
r_ctl |= FC_R_CTL_SOL_CTRL;
} else {
r_ctl |= FC_R_CTL_UNSOL_CTRL;
}
break;
default:
r_ctl = FC_R_CTL_DATA;
switch ( meta->flags &
( XFER_FL_CMD_STAT | XFER_FL_RESPONSE ) ) {
@ -488,6 +502,7 @@ static int fc_xchg_tx ( struct fc_exchange *xchg, struct io_buffer *iobuf,
r_ctl |= FC_R_CTL_UNSOL_DATA;
break;
}
break;
}
/* Calculate exchange and sequence control */
@ -799,6 +814,7 @@ static void fc_port_close ( struct fc_port *port, int rc ) {
/* Shut down interfaces */
intf_shutdown ( &port->transport, rc );
intf_shutdown ( &port->flogi, rc );
intf_shutdown ( &port->ns_plogi, rc );
/* Shut down any remaining exchanges */
list_for_each_entry_safe ( xchg, tmp, &port->xchgs, list )
@ -922,6 +938,7 @@ int fc_port_login ( struct fc_port *port, struct fc_port_id *port_id,
const struct fc_name *link_port_wwn, int has_fabric ) {
struct fc_peer *peer;
struct fc_peer *tmp;
int rc;
/* Perform implicit logout if logged in and details differ */
if ( fc_link_ok ( &port->link ) &&
@ -978,6 +995,23 @@ int fc_port_login ( struct fc_port *port, struct fc_port_id *port_id,
fc_id_ntoa ( &port->port_id ) );
}
/* Log in to name server, if attached to a fabric */
if ( has_fabric && ! ( port->flags & FC_PORT_HAS_NS ) ) {
DBGC ( port, "FCPORT %s attempting login to name server\n",
port->name );
intf_restart ( &port->ns_plogi, -ECANCELED );
if ( ( rc = fc_els_plogi ( &port->ns_plogi, port,
&fc_gs_port_id ) ) != 0 ) {
DBGC ( port, "FCPORT %s could not initiate name "
"server PLOGI: %s\n",
port->name, strerror ( rc ) );
fc_port_logout ( port, rc );
return rc;
}
}
/* Record login */
fc_link_up ( &port->link );
@ -1006,6 +1040,7 @@ void fc_port_logout ( struct fc_port *port, int rc ) {
/* Erase port details */
memset ( &port->port_id, 0, sizeof ( port->port_id ) );
port->flags = 0;
/* Record logout */
fc_link_err ( &port->link, rc );
@ -1032,6 +1067,27 @@ static void fc_port_flogi_done ( struct fc_port *port, int rc ) {
fc_port_logout ( port, rc );
}
/**
* Handle name server PLOGI completion
*
* @v port Fibre Channel port
* @v rc Reason for completion
*/
static void fc_port_ns_plogi_done ( struct fc_port *port, int rc ) {
intf_restart ( &port->ns_plogi, rc );
if ( rc == 0 ) {
port->flags |= FC_PORT_HAS_NS;
DBGC ( port, "FCPORT %s logged in to name server\n",
port->name );
} else {
DBGC ( port, "FCPORT %s could not log in to name server: %s\n",
port->name, strerror ( rc ) );
/* Absence of a name server is not a fatal error */
}
}
/**
* Examine Fibre Channel port link state
*
@ -1107,6 +1163,15 @@ static struct interface_operation fc_port_flogi_op[] = {
static struct interface_descriptor fc_port_flogi_desc =
INTF_DESC ( struct fc_port, flogi, fc_port_flogi_op );
/** Fibre Channel port name server PLOGI interface operations */
static struct interface_operation fc_port_ns_plogi_op[] = {
INTF_OP ( intf_close, struct fc_port *, fc_port_ns_plogi_done ),
};
/** Fibre Channel port name server PLOGI interface descriptor */
static struct interface_descriptor fc_port_ns_plogi_desc =
INTF_DESC ( struct fc_port, ns_plogi, fc_port_ns_plogi_op );
/**
* Create Fibre Channel port
*
@ -1128,6 +1193,7 @@ int fc_port_open ( struct interface *transport, const struct fc_name *node_wwn,
intf_init ( &port->transport, &fc_port_transport_desc, &port->refcnt );
fc_link_init ( &port->link, fc_port_examine, &port->refcnt );
intf_init ( &port->flogi, &fc_port_flogi_desc, &port->refcnt );
intf_init ( &port->ns_plogi, &fc_port_ns_plogi_desc, &port->refcnt );
list_add_tail ( &port->list, &fc_ports );
INIT_LIST_HEAD ( &port->xchgs );
memcpy ( &port->node_wwn, node_wwn, sizeof ( port->node_wwn ) );
@ -1162,26 +1228,6 @@ struct fc_port * fc_port_find ( const char *name ) {
return NULL;
}
/**
* Find Fibre Channel port by link node name
*
* @v link_port_wwn Link node name
* @ret port Fibre Channel port, or NULL
*/
static struct fc_port *
fc_port_find_link_wwn ( struct fc_name *link_port_wwn ) {
struct fc_port *port;
list_for_each_entry ( port, &fc_ports, list ) {
if ( fc_link_ok ( &port->link ) &&
( memcmp ( &port->link_port_wwn, link_port_wwn,
sizeof ( port->link_port_wwn ) ) == 0 ) ) {
return port;
}
}
return NULL;
}
/******************************************************************************
*
* Fibre Channel peers
@ -1339,6 +1385,30 @@ static void fc_peer_plogi_done ( struct fc_peer *peer, int rc ) {
fc_peer_logout ( peer, rc );
}
/**
* Initiate PLOGI
*
* @v peer Fibre Channel peer
* @v port Fibre Channel port
* @v peer_port_id Peer port ID
* @ret rc Return status code
*/
static int fc_peer_plogi ( struct fc_peer *peer, struct fc_port *port,
struct fc_port_id *peer_port_id ) {
int rc;
/* Try to create PLOGI ELS */
intf_restart ( &peer->plogi, -ECANCELED );
if ( ( rc = fc_els_plogi ( &peer->plogi, port, peer_port_id ) ) != 0 ) {
DBGC ( peer, "FCPEER %s could not initiate PLOGI: %s\n",
fc_ntoa ( &peer->port_wwn ), strerror ( rc ) );
fc_peer_logout ( peer, rc );
return rc;
}
return 0;
}
/**
* Examine Fibre Channel peer link state
*
@ -1347,7 +1417,6 @@ static void fc_peer_plogi_done ( struct fc_peer *peer, int rc ) {
static void fc_peer_examine ( struct fc_link_state *link ) {
struct fc_peer *peer = container_of ( link, struct fc_peer, link );
struct fc_port *port;
struct fc_port_id *peer_port_id;
int rc;
/* Check to see if underlying port link has gone down */
@ -1366,23 +1435,36 @@ static void fc_peer_examine ( struct fc_link_state *link ) {
/* Sanity check */
assert ( peer->port == NULL );
/* Look for a port with the peer attached via a point-to-point link */
port = fc_port_find_link_wwn ( &peer->port_wwn );
if ( ! port ) {
DBGC ( peer, "FCPEER %s could not find a point-to-point "
"link\n", fc_ntoa ( &peer->port_wwn ) );
fc_peer_logout ( peer, -ENOENT );
return;
/* First, look for a port with the peer attached via a
* point-to-point link.
*/
list_for_each_entry ( port, &fc_ports, list ) {
if ( fc_link_ok ( &port->link ) &&
( ! ( port->flags & FC_PORT_HAS_FABRIC ) ) &&
( memcmp ( &peer->port_wwn, &port->link_port_wwn,
sizeof ( peer->port_wwn ) ) == 0 ) ) {
/* Use this peer port ID, and stop looking */
fc_peer_plogi ( peer, port, &port->ptp_link_port_id );
return;
}
}
peer_port_id = &port->ptp_link_port_id;
/* Try to create PLOGI ELS */
intf_restart ( &peer->plogi, -ECANCELED );
if ( ( rc = fc_els_plogi ( &peer->plogi, port, peer_port_id ) ) != 0 ) {
DBGC ( peer, "FCPEER %s could not initiate PLOGI: %s\n",
fc_ntoa ( &peer->port_wwn ), strerror ( rc ) );
fc_peer_logout ( peer, rc );
return;
/* If the peer is not directly attached, try initiating a name
* server lookup on any suitable ports.
*/
list_for_each_entry ( port, &fc_ports, list ) {
if ( fc_link_ok ( &port->link ) &&
( port->flags & FC_PORT_HAS_FABRIC ) &&
( port->flags & FC_PORT_HAS_NS ) ) {
if ( ( rc = fc_ns_query ( peer, port,
fc_peer_plogi ) ) != 0 ) {
DBGC ( peer, "FCPEER %s could not attempt "
"name server lookup on %s: %s\n",
fc_ntoa ( &peer->port_wwn ), port->name,
strerror ( rc ) );
/* Non-fatal */
}
}
}
}

240
src/net/fcns.c Normal file
View File

@ -0,0 +1,240 @@
/*
* Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/interface.h>
#include <ipxe/iobuf.h>
#include <ipxe/process.h>
#include <ipxe/xfer.h>
#include <ipxe/fc.h>
#include <ipxe/fcns.h>
/** @file
*
* Fibre Channel name server lookups
*
*/
/** A Fibre Channel name server query */
struct fc_ns_query {
/** Reference count */
struct refcnt refcnt;
/** Fibre Channel exchange */
struct interface xchg;
/** Fibre Channel peer */
struct fc_peer *peer;
/** Fibre Channel port */
struct fc_port *port;
/** Process */
struct process process;
/** Success handler
*
* @v peer Fibre Channel peer
* @v port Fibre Channel port
* @v peer_port_id Peer port ID
* @ret rc Return status code
*/
int ( * done ) ( struct fc_peer *peer, struct fc_port *port,
struct fc_port_id *peer_port_id );
};
/**
* Free name server query
*
* @v refcnt Reference count
*/
static void fc_ns_query_free ( struct refcnt *refcnt ) {
struct fc_ns_query *query =
container_of ( refcnt, struct fc_ns_query, refcnt );
fc_peer_put ( query->peer );
fc_port_put ( query->port );
free ( query );
}
/**
* Close name server query
*
* @v query Name server query
* @v rc Reason for close
*/
static void fc_ns_query_close ( struct fc_ns_query *query, int rc ) {
/* Stop process */
process_del ( &query->process );
/* Shut down interfaces */
intf_shutdown ( &query->xchg, rc );
}
/**
* Receive name server query response
*
* @v query Name server query
* @v iobuf I/O buffer
* @v meta Data transfer metadata
* @ret rc Return status code
*/
static int fc_ns_query_deliver ( struct fc_ns_query *query,
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
union fc_ns_response *resp = iobuf->data;
struct fc_port_id *peer_port_id;
int rc;
/* Sanity check */
if ( iob_len ( iobuf ) < sizeof ( resp->ct ) ) {
DBGC ( query, "FCNS %p received underlength response (%zd "
"bytes)\n", query, iob_len ( iobuf ) );
rc = -EINVAL;
goto done;
}
/* Handle response */
switch ( ntohs ( resp->ct.code ) ) {
case FC_GS_ACCEPT:
if ( iob_len ( iobuf ) < sizeof ( resp->gid_pn ) ) {
DBGC ( query, "FCNS %p received underlength accept "
"response (%zd bytes)\n",
query, iob_len ( iobuf ) );
rc = -EINVAL;
goto done;
}
peer_port_id = &resp->gid_pn.port_id.port_id;
DBGC ( query, "FCNS %p resolved %s to %s via %s\n",
query, fc_ntoa ( &query->peer->port_wwn ),
fc_id_ntoa ( peer_port_id ), query->port->name );
if ( ( rc = query->done ( query->peer, query->port,
peer_port_id ) ) != 0 )
goto done;
break;
case FC_GS_REJECT:
DBGC ( query, "FCNS %p rejected (reason %02x explanation "
"%02x)\n", query, resp->reject.ct.reason,
resp->reject.ct.explanation );
break;
default:
DBGC ( query, "FCNS %p received invalid response code %04x\n",
query, ntohs ( resp->ct.code ) );
rc = -ENOTSUP;
goto done;
}
rc = 0;
done:
free_iob ( iobuf );
fc_ns_query_close ( query, rc );
return rc;
}
/**
* Name server query process
*
* @v process Process
*/
static void fc_ns_query_step ( struct process *process ) {
struct fc_ns_query *query =
container_of ( process, struct fc_ns_query, process );
struct xfer_metadata meta;
struct fc_ns_gid_pn_request gid_pn;
int xchg_id;
int rc;
/* Stop process */
process_del ( &query->process );
/* Create exchange */
if ( ( xchg_id = fc_xchg_originate ( &query->xchg, query->port,
&fc_gs_port_id,
FC_TYPE_CT ) ) < 0 ) {
rc = xchg_id;
DBGC ( query, "FCNS %p could not create exchange: %s\n",
query, strerror ( rc ) );
fc_ns_query_close ( query, rc );
return;
}
/* Construct query request */
memset ( &gid_pn, 0, sizeof ( gid_pn ) );
gid_pn.ct.revision = FC_CT_REVISION;
gid_pn.ct.type = FC_GS_TYPE_DS;
gid_pn.ct.subtype = FC_DS_SUBTYPE_NAME;
gid_pn.ct.code = htons ( FC_NS_GET ( FC_NS_PORT_NAME, FC_NS_PORT_ID ));
memcpy ( &gid_pn.port_wwn, &query->peer->port_wwn,
sizeof ( gid_pn.port_wwn ) );
memset ( &meta, 0, sizeof ( meta ) );
meta.flags = XFER_FL_OVER;
/* Send query */
if ( ( rc = xfer_deliver_raw_meta ( &query->xchg, &gid_pn,
sizeof ( gid_pn ), &meta ) ) != 0){
DBGC ( query, "FCNS %p could not deliver query: %s\n",
query, strerror ( rc ) );
fc_ns_query_close ( query, rc );
return;
}
}
/** Name server exchange interface operations */
static struct interface_operation fc_ns_query_xchg_op[] = {
INTF_OP ( xfer_deliver, struct fc_ns_query *, fc_ns_query_deliver ),
INTF_OP ( intf_close, struct fc_ns_query *, fc_ns_query_close ),
};
/** Name server exchange interface descriptor */
static struct interface_descriptor fc_ns_query_xchg_desc =
INTF_DESC ( struct fc_ns_query, xchg, fc_ns_query_xchg_op );
/**
* Issue Fibre Channel name server query
*
* @v peer Fibre Channel peer
* @v port Fibre Channel port
* @ret rc Return status code
*/
int fc_ns_query ( struct fc_peer *peer, struct fc_port *port,
int ( * done ) ( struct fc_peer *peer, struct fc_port *port,
struct fc_port_id *peer_port_id ) ) {
struct fc_ns_query *query;
/* Allocate and initialise structure */
query = zalloc ( sizeof ( *query ) );
if ( ! query )
return -ENOMEM;
ref_init ( &query->refcnt, fc_ns_query_free );
intf_init ( &query->xchg, &fc_ns_query_xchg_desc, &query->refcnt );
process_init ( &query->process, fc_ns_query_step, &query->refcnt );
query->peer = fc_peer_get ( peer );
query->port = fc_port_get ( port );
query->done = done;
DBGC ( query, "FCNS %p querying %s via %s\n",
query, fc_ntoa ( &query->peer->port_wwn ), port->name );
/* Mortalise self and return */
ref_put ( &query->refcnt );
return 0;
}