/**
* fc_lport_enter_ns() - register some object 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_ns(struct fc_lport *lport, enum fc_lport_state state)
{
struct fc_frame *fp;
enum fc_ns_req cmd;
int size = sizeof(struct fc_ct_hdr);
size_t len;
FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
fc_lport_state_names[state],
fc_lport_state(lport));
fc_lport_state_enter(lport, state);
switch (state) {
case LPORT_ST_RNN_ID:
cmd = FC_NS_RNN_ID;
size += sizeof(struct fc_ns_rn_id);
break;
case LPORT_ST_RSNN_NN:
len = strnlen(fc_host_symbolic_name(lport->host), 255);
/* if there is no symbolic name, skip to RFT_ID */
if (!len)
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
cmd = FC_NS_RSNN_NN;
size += sizeof(struct fc_ns_rsnn) + len;
break;
case LPORT_ST_RSPN_ID:
len = strnlen(fc_host_symbolic_name(lport->host), 255);
/* if there is no symbolic name, skip to RFT_ID */
if (!len)
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
cmd = FC_NS_RSPN_ID;
size += sizeof(struct fc_ns_rspn) + len;
break;
case LPORT_ST_RFT_ID:
cmd = FC_NS_RFT_ID;
size += sizeof(struct fc_ns_rft);
break;
case LPORT_ST_RFF_ID:
cmd = FC_NS_RFF_ID;
size += sizeof(struct fc_ns_rff_id);
break;
default:
fc_lport_error(lport, NULL);
return;
}
fp = fc_frame_alloc(lport, size);
if (!fp) {
fc_lport_error(lport, fp);
return;
}
if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
fc_lport_ns_resp,
lport, 3 * lport->r_a_tov))
fc_lport_error(lport, fp);
}
/**
* fc_lport_rport_callback() - Event handler for rport events
* @lport: The lport which is receiving the event
* @rdata: private remote port data
* @event: The event that occured
*
* Locking Note: The rport lock should not be held when calling
* this function.
*/
static void fc_lport_rport_callback(struct fc_lport *lport,
struct fc_rport_priv *rdata,
enum fc_rport_event event)
{
FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
rdata->ids.port_id);
mutex_lock(&lport->lp_mutex);
switch (event) {
case RPORT_EV_READY:
if (lport->state == LPORT_ST_DNS) {
lport->dns_rdata = rdata;
fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
} else {
FC_LPORT_DBG(lport, "Received an READY event "
"on port (%6.6x) for the directory "
"server, but the lport is not "
"in the DNS state, it's in the "
"%d state", rdata->ids.port_id,
lport->state);
lport->tt.rport_logoff(rdata);
}
break;
case RPORT_EV_LOGO:
case RPORT_EV_FAILED:
case RPORT_EV_STOP:
lport->dns_rdata = NULL;
break;
case RPORT_EV_NONE:
break;
}
mutex_unlock(&lport->lp_mutex);
}
static void fc_lport_timeout(struct work_struct *work)
{
struct fc_lport *lport =
container_of(work, struct fc_lport,
retry_work.work);
mutex_lock(&lport->lp_mutex);
switch (lport->state) {
case LPORT_ST_DISABLED:
WARN_ON(1);
break;
case LPORT_ST_READY:
break;
case LPORT_ST_RESET:
break;
case LPORT_ST_FLOGI:
fc_lport_enter_flogi(lport);
break;
case LPORT_ST_DNS:
fc_lport_enter_dns(lport);
break;
case LPORT_ST_RNN_ID:
case LPORT_ST_RSNN_NN:
case LPORT_ST_RSPN_ID:
case LPORT_ST_RFT_ID:
case LPORT_ST_RFF_ID:
fc_lport_enter_ns(lport, lport->state);
break;
case LPORT_ST_FDMI:
fc_lport_enter_fdmi(lport);
break;
case LPORT_ST_RHBA:
case LPORT_ST_RPA:
case LPORT_ST_DHBA:
case LPORT_ST_DPRT:
fc_lport_enter_ms(lport, lport->state);
break;
case LPORT_ST_SCR:
fc_lport_enter_scr(lport);
break;
case LPORT_ST_LOGO:
fc_lport_enter_logo(lport);
break;
}
mutex_unlock(&lport->lp_mutex);
}
/**
* 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
*
* 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_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 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_RNN_ID || lport->state > LPORT_ST_RFF_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;
}
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)
switch (lport->state) {
case LPORT_ST_RNN_ID:
fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
break;
case LPORT_ST_RSNN_NN:
fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
break;
case LPORT_ST_RSPN_ID:
fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
break;
case LPORT_ST_RFT_ID:
fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
break;
case LPORT_ST_RFF_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:
mutex_unlock(&lport->lp_mutex);
}