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authorYi Zou <yi.zou@intel.com>2009-11-20 14:55:24 -0800
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:01:59 -0600
commit63e27fb80c2010678681cef7b528ab8af3624fe9 (patch)
tree2ce41c886c976ead202044eb32d3e9aacc97e023 /drivers/scsi/libfc/fc_rport.c
parentb84056bf68404a5fe06b452ea9790b9927e793a6 (diff)
[SCSI] libfc: add support of receiving ELS_RLS
Upon receiving ELS_RLS, send the Link Error Status Block (LESB) back. Signed-off-by: Yi Zou <yi.zou@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_rport.c')
-rw-r--r--drivers/scsi/libfc/fc_rport.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 91e2ba27f7b..35ca0e72df4 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1098,6 +1098,78 @@ drop:
}
/**
+ * fc_rport_recv_rls_req() - Handle received Read Link Status request
+ * @rdata: The remote port that sent the RLS request
+ * @sp: The sequence that the RLS was on
+ * @rx_fp: The PRLI request frame
+ *
+ * Locking Note: The rport lock is expected to be held before calling
+ * this function.
+ */
+static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
+ struct fc_seq *sp, struct fc_frame *rx_fp)
+
+{
+ struct fc_lport *lport = rdata->local_port;
+ struct fc_frame *fp;
+ struct fc_exch *ep = fc_seq_exch(sp);
+ struct fc_els_rls *rls;
+ struct fc_els_rls_resp *rsp;
+ struct fc_els_lesb *lesb;
+ struct fc_seq_els_data rjt_data;
+ struct fc_host_statistics *hst;
+ u32 f_ctl;
+
+ FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
+ fc_rport_state(rdata));
+
+ rls = fc_frame_payload_get(rx_fp, sizeof(*rls));
+ if (!rls) {
+ rjt_data.reason = ELS_RJT_PROT;
+ rjt_data.explan = ELS_EXPL_INV_LEN;
+ goto out_rjt;
+ }
+
+ fp = fc_frame_alloc(lport, sizeof(*rsp));
+ if (!fp) {
+ rjt_data.reason = ELS_RJT_UNAB;
+ rjt_data.explan = ELS_EXPL_INSUF_RES;
+ goto out_rjt;
+ }
+
+ rsp = fc_frame_payload_get(fp, sizeof(*rsp));
+ memset(rsp, 0, sizeof(*rsp));
+ rsp->rls_cmd = ELS_LS_ACC;
+ lesb = &rsp->rls_lesb;
+ if (lport->tt.get_lesb) {
+ /* get LESB from LLD if it supports it */
+ lport->tt.get_lesb(lport, lesb);
+ } else {
+ fc_get_host_stats(lport->host);
+ hst = &lport->host_stats;
+ lesb->lesb_link_fail = htonl(hst->link_failure_count);
+ lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count);
+ lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count);
+ lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count);
+ lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count);
+ lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
+ }
+
+ sp = lport->tt.seq_start_next(sp);
+ f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
+ fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+ FC_TYPE_ELS, f_ctl, 0);
+ lport->tt.seq_send(lport, sp, fp);
+ goto out;
+
+out_rjt:
+ rjt_data.fp = NULL;
+ lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+out:
+ fc_frame_free(rx_fp);
+}
+
+/**
* fc_rport_recv_els_req() - Handler for validated ELS requests
* @lport: The local port that received the ELS request
* @sp: The sequence that the ELS request was on
@@ -1159,6 +1231,9 @@ static void fc_rport_recv_els_req(struct fc_lport *lport,
els_data.fp = fp;
lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data);
break;
+ case ELS_RLS:
+ fc_rport_recv_rls_req(rdata, sp, fp);
+ break;
default:
fc_frame_free(fp); /* can't happen */
break;
@@ -1203,6 +1278,7 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
case ELS_ADISC:
case ELS_RRQ:
case ELS_REC:
+ case ELS_RLS:
fc_rport_recv_els_req(lport, sp, fp);
break;
default: