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[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: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Chris Leech 2009-11-03 11:47:01 -08:00 committed by James Bottomley
parent 5baa17c3e6
commit c9866a5480
4 changed files with 112 additions and 0 deletions
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90
drivers/scsi/libfc/fc_lport.c
View File

@ -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 @@ err:
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;

10
include/scsi/fc/fc_ns.h
View File

@ -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_ */

11
include/scsi/fc_encode.h
View File

@ -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);

1
include/scsi/libfc.h
View File

@ -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,