[SCSI] libfc: Register Symbolic Node Name (RSNN_NN)
Register the fc_host symbolic name as the symbolic node 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>
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 897b5a8..cc389c0 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -109,6 +109,7 @@
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_rft_id(struct fc_lport *);
static void fc_lport_enter_scr(struct fc_lport *);
static void fc_lport_enter_ready(struct fc_lport *);
@@ -119,6 +120,7 @@
[LPORT_ST_FLOGI] = "FLOGI",
[LPORT_ST_DNS] = "dNS",
[LPORT_ST_RNN_ID] = "RNN_ID",
+ [LPORT_ST_RSNN_NN] = "RSNN_NN",
[LPORT_ST_RFT_ID] = "RFT_ID",
[LPORT_ST_SCR] = "SCR",
[LPORT_ST_READY] = "Ready",
@@ -966,6 +968,7 @@
case LPORT_ST_READY:
case LPORT_ST_RESET:
case LPORT_ST_RNN_ID:
+ case LPORT_ST_RSNN_NN:
case LPORT_ST_RFT_ID:
case LPORT_ST_SCR:
case LPORT_ST_DNS:
@@ -1033,6 +1036,60 @@
}
/**
+ * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name
+ * by Node Name (RSNN_NN) request
+ * @sp: current sequence in RSNN_NN 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_rsnn_nn_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 RSNN_NN %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_RSNN_NN) {
+ FC_LPORT_DBG(lport, "Received a RSNN_NN 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_rsnn_nn(lport);
+ else
+ fc_lport_error(lport, fp);
+
+out:
+ fc_frame_free(fp);
+err:
+ mutex_unlock(&lport->lp_mutex);
+}
+
+/**
* fc_lport_rnn_id_resp() - Handle response to Register Node
* Name by ID (RNN_ID) request
* @sp: current sequence in RNN_ID exchange
@@ -1204,6 +1261,37 @@
}
/**
+ * fc_rport_enter_rsnn_nn() - Register symbolic node 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_rsnn_nn(struct fc_lport *lport)
+{
+ struct fc_frame *fp;
+ size_t len;
+
+ FC_LPORT_DBG(lport, "Entered RSNN_NN state from %s state\n",
+ fc_lport_state(lport));
+
+ fc_lport_state_enter(lport, LPORT_ST_RSNN_NN);
+
+ len = strnlen(fc_host_symbolic_name(lport->host), 255);
+ fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+ sizeof(struct fc_ns_rsnn) + len);
+ if (!fp) {
+ fc_lport_error(lport, fp);
+ return;
+ }
+
+ if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN,
+ fc_lport_rsnn_nn_resp,
+ lport, lport->e_d_tov))
+ fc_lport_error(lport, fp);
+}
+
+/**
* fc_rport_enter_rnn_id() - Register node name with the name server
* @lport: Fibre Channel local port to register
*
@@ -1296,6 +1384,9 @@
case LPORT_ST_RNN_ID:
fc_lport_enter_rnn_id(lport);
break;
+ case LPORT_ST_RSNN_NN:
+ fc_lport_enter_rsnn_nn(lport);
+ break;
case LPORT_ST_RFT_ID:
fc_lport_enter_rft_id(lport);
break;