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authorChris Leech <christopher.leech@intel.com>2009-11-03 11:46:51 -0800
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:01:01 -0600
commitc9c7bd7a5e7321aa96289c9b48fdbcc828c105e6 (patch)
treee20db89880f4579abf8bd6da66ce2a2a80d0ea94 /drivers/scsi/libfc/fc_lport.c
parent28cc0e31d874af05244da421e05565f2ba72fd5c (diff)
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[SCSI] libfc: RNN_ID may be required before RSNN_NN with some switches
One could interpret FC-GS-5 to say that an explicit RNN_ID is required before RSNN_NN is allowed to succeed, which is why RNN_ID was not obsoleted along with RPN_ID acording to this document: ftp://ftp.t11.org/t11/member/fc/gs-5/05-546v2.pdf 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>
Diffstat (limited to 'drivers/scsi/libfc/fc_lport.c')
-rw-r--r--drivers/scsi/libfc/fc_lport.c91
1 files changed, 90 insertions, 1 deletions
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 47577e4a2e87..897b5a8487e2 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -108,6 +108,7 @@ static void fc_lport_error(struct fc_lport *, struct fc_frame *);
static void fc_lport_enter_reset(struct fc_lport *);
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_rft_id(struct fc_lport *);
static void fc_lport_enter_scr(struct fc_lport *);
static void fc_lport_enter_ready(struct fc_lport *);
@@ -117,6 +118,7 @@ static const char *fc_lport_state_names[] = {
[LPORT_ST_DISABLED] = "disabled",
[LPORT_ST_FLOGI] = "FLOGI",
[LPORT_ST_DNS] = "dNS",
+ [LPORT_ST_RNN_ID] = "RNN_ID",
[LPORT_ST_RFT_ID] = "RFT_ID",
[LPORT_ST_SCR] = "SCR",
[LPORT_ST_READY] = "Ready",
@@ -151,7 +153,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
case RPORT_EV_READY:
if (lport->state == LPORT_ST_DNS) {
lport->dns_rp = rdata;
- fc_lport_enter_rft_id(lport);
+ fc_lport_enter_rnn_id(lport);
} else {
FC_LPORT_DBG(lport, "Received an READY event "
"on port (%6x) for the directory "
@@ -963,6 +965,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
case LPORT_ST_DISABLED:
case LPORT_ST_READY:
case LPORT_ST_RESET:
+ case LPORT_ST_RNN_ID:
case LPORT_ST_RFT_ID:
case LPORT_ST_SCR:
case LPORT_ST_DNS:
@@ -1030,6 +1033,60 @@ err:
}
/**
+ * fc_lport_rnn_id_resp() - Handle response to Register Node
+ * Name by ID (RNN_ID) request
+ * @sp: current sequence in RNN_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_rnn_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 RNN_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_RNN_ID) {
+ FC_LPORT_DBG(lport, "Received a RNN_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_rft_id(lport);
+ else
+ fc_lport_error(lport, fp);
+
+out:
+ fc_frame_free(fp);
+err:
+ mutex_unlock(&lport->lp_mutex);
+}
+
+/**
* fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
* @sp: current sequence in SCR exchange
* @fp: response frame
@@ -1146,6 +1203,35 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
fc_lport_error(lport, fp);
}
+/**
+ * fc_rport_enter_rnn_id() - Register 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_rnn_id(struct fc_lport *lport)
+{
+ struct fc_frame *fp;
+
+ FC_LPORT_DBG(lport, "Entered RNN_ID state from %s state\n",
+ fc_lport_state(lport));
+
+ fc_lport_state_enter(lport, LPORT_ST_RNN_ID);
+
+ fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+ sizeof(struct fc_ns_rn_id));
+ if (!fp) {
+ fc_lport_error(lport, fp);
+ return;
+ }
+
+ if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID,
+ fc_lport_rnn_id_resp,
+ lport, lport->e_d_tov))
+ fc_lport_error(lport, fp);
+}
+
static struct fc_rport_operations fc_lport_rport_ops = {
.event_callback = fc_lport_rport_callback,
};
@@ -1207,6 +1293,9 @@ static void fc_lport_timeout(struct work_struct *work)
case LPORT_ST_DNS:
fc_lport_enter_dns(lport);
break;
+ case LPORT_ST_RNN_ID:
+ fc_lport_enter_rnn_id(lport);
+ break;
case LPORT_ST_RFT_ID:
fc_lport_enter_rft_id(lport);
break;