diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/libfc/fc_rport.c | 76 |
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: |