[PATCH 21/35] libfc: combine name server registration response handlers

Robert Love
2009-09-11T23:58:44Z

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

They all do the same thing, so combine them into a single function.

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 | 205 ++++++-----------------------------------
1 files changed, 30 insertions(+), 175 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 76197d7..5e7b560 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -985,9 +985,9 @@ 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 (RFT_ID) request
- * @sp: current sequence in RFT_ID exchange
+ * fc_lport_ns_resp() - Handle response to a name server
+ * registration exchange
+ * @sp: current sequence in exchange
* @fp: response frame
* @lp_arg: Fibre Channel host port instance
*
@@ -995,130 +995,23 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
* held, but it will lock, call an _enter_* function or fc_lport_error
* and then unlock the lport.
*/
-static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp,
- void *lp_arg)
+static void fc_lport_ns_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 RFT_ID %s\n", fc_els_resp_type(fp));
+ FC_LPORT_DBG(lport, "Received a ns %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_RFT_ID) {
- FC_LPORT_DBG(lport, "Received a RFT_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_scr(lport);
- else
- fc_lport_error(lport, fp);
-out:
- fc_frame_free(fp);
-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
- * @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 (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) {
+ FC_LPORT_DBG(lport, "Received a name server response, "
+ "but in state %s\n", fc_lport_state(lport));
if (IS_ERR(fp))
goto err;
goto out;
@@ -1131,68 +1024,30 @@ static void fc_lport_rsnn_nn_resp(struct fc_seq *sp, struct fc_frame *fp,

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
- * @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);
+ switch (lport->state) {
+ case LPORT_ST_RNN_ID:
+ fc_lport_enter_rsnn_nn(lport);
+ break;
+ case LPORT_ST_RSNN_NN:
+ fc_lport_enter_rspn_id(lport);
+ break;
+ case LPORT_ST_RSPN_ID:
+ fc_lport_enter_rft_id(lport);
+ break;
+ case LPORT_ST_RFT_ID:
+ fc_lport_enter_scr(lport);
+ break;
+ default:
+ /* should have already been caught by state checks */
+ break;
+ }
else
fc_lport_error(lport, fp);
-
out:
fc_frame_free(fp);
err:
@@ -1311,7 +1166,7 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
}

if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID,
- fc_lport_rft_id_resp,
+ fc_lport_ns_resp,
lport, lport->e_d_tov))
fc_lport_error(lport, fp);
}
@@ -1342,7 +1197,7 @@ static void fc_lport_enter_rspn_id(struct fc_lport *lport)
}

if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
- fc_lport_rspn_id_resp,
+ fc_lport_ns_resp,
lport, lport->e_d_tov))
fc_lport_error(lport, fp);
}
@@ -1373,7 +1228,7 @@ static void fc_lport_enter_rsnn_nn(struct fc_lport *lport)
}

if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN,
- fc_lport_rsnn_nn_resp,
+ fc_lport_ns_resp,
lport, lport->e_d_tov))
fc_lport_error(lport, fp);
}
@@ -1402,7 +1257,7 @@ static void fc_lport_enter_rnn_id(struct fc_lport *lport)
}

if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID,
- fc_lport_rnn_id_resp,
+ fc_lport_ns_resp,
lport, lport->e_d_tov))
fc_lport_error(lport, fp);
}