[PATCH 14/54] libfc: RPN_ID is obsolete and unnecessary

Robert Love
2009-11-03T19:46:40Z

From: Chris Leech <christopher.leech@intel.com>

RPN_ID has been obsolete per FC-GS-5 for several years. The port name is
registered implicitly as part of FLOGI, and it is undesirable for ports to
change a registered port name using RPN_ID while logged into the fabric.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

drivers/scsi/libfc/fc_lport.c | 95 +----------------------------------------
include/scsi/libfc.h | 1
2 files changed, 3 insertions(+), 93 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 807f5b3..47577e4 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -108,7 +108,6 @@ 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_rpn_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 *);
@@ -118,7 +117,6 @@ static const char *fc_lport_state_names[] = {
[LPORT_ST_DISABLED] = "disabled",
[LPORT_ST_FLOGI] = "FLOGI",
[LPORT_ST_DNS] = "dNS",
- [LPORT_ST_RPN_ID] = "RPN_ID",
[LPORT_ST_RFT_ID] = "RFT_ID",
[LPORT_ST_SCR] = "SCR",
[LPORT_ST_READY] = "Ready",
@@ -153,7 +151,7 @@ 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_rpn_id(lport);
+ fc_lport_enter_rft_id(lport);
} else {
FC_LPORT_DBG(lport, "Received an READY event "
"on port (%6x) for the directory "
@@ -965,7 +963,6 @@ 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_RPN_ID:
case LPORT_ST_RFT_ID:
case LPORT_ST_SCR:
case LPORT_ST_DNS:
@@ -980,8 +977,8 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)

/**
* fc_lport_rft_id_resp() - Handle response to Register Fibre
- * Channel Types by ID (RPN_ID) request
- * @sp: current sequence in RPN_ID exchange
+ * Channel Types by ID (RFT_ID) request
+ * @sp: current sequence in RFT_ID exchange
* @fp: response frame
* @lp_arg: Fibre Channel host port instance
*
@@ -1033,60 +1030,6 @@ err:
}

/**
- * fc_lport_rpn_id_resp() - Handle response to Register Port
- * Name by ID (RPN_ID) request
- * @sp: current sequence in RPN_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_rpn_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 RPN_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_RPN_ID) {
- FC_LPORT_DBG(lport, "Received a RPN_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
@@ -1203,35 +1146,6 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
fc_lport_error(lport, fp);
}

-/**
- * fc_rport_enter_rft_id() - Register 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_rpn_id(struct fc_lport *lport)
-{
- struct fc_frame *fp;
-
- FC_LPORT_DBG(lport, "Entered RPN_ID state from %s state\n",
- fc_lport_state(lport));
-
- fc_lport_state_enter(lport, LPORT_ST_RPN_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_RPN_ID,
- fc_lport_rpn_id_resp,
- lport, lport->e_d_tov))
- fc_lport_error(lport, NULL);
-}
-
static struct fc_rport_operations fc_lport_rport_ops = {
.event_callback = fc_lport_rport_callback,
};
@@ -1293,9 +1207,6 @@ static void fc_lport_timeout(struct work_struct *work)
case LPORT_ST_DNS:
fc_lport_enter_dns(lport);
break;
- case LPORT_ST_RPN_ID:
- fc_lport_enter_rpn_id(lport);
- break;
case LPORT_ST_RFT_ID:
fc_lport_enter_rft_id(lport);
break;
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index dad66ce..75be713 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -61,7 +61,6 @@ enum fc_lport_state {
LPORT_ST_DISABLED = 0,
LPORT_ST_FLOGI,
LPORT_ST_DNS,
- LPORT_ST_RPN_ID,
LPORT_ST_RFT_ID,
LPORT_ST_SCR,
LPORT_ST_READY,