| /* |
| * Copyright(c) 2008 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Maintained at www.Open-FCoE.org |
| */ |
| |
| /* |
| * Provide interface to send ELS/CT FC frames |
| */ |
| |
| #include <asm/unaligned.h> |
| #include <scsi/fc/fc_gs.h> |
| #include <scsi/fc/fc_ns.h> |
| #include <scsi/fc/fc_els.h> |
| #include <scsi/libfc.h> |
| #include <scsi/fc_encode.h> |
| |
| /* |
| * fc_elsct_send - sends ELS/CT frame |
| */ |
| static struct fc_seq *fc_elsct_send(struct fc_lport *lport, |
| u32 did, |
| struct fc_frame *fp, |
| unsigned int op, |
| void (*resp)(struct fc_seq *, |
| struct fc_frame *fp, |
| void *arg), |
| void *arg, u32 timer_msec) |
| { |
| enum fc_rctl r_ctl; |
| enum fc_fh_type fh_type; |
| int rc; |
| |
| /* ELS requests */ |
| if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) |
| rc = fc_els_fill(lport, did, fp, op, &r_ctl, &fh_type); |
| else { |
| /* CT requests */ |
| rc = fc_ct_fill(lport, did, fp, op, &r_ctl, &fh_type); |
| did = FC_FID_DIR_SERV; |
| } |
| |
| if (rc) { |
| fc_frame_free(fp); |
| return NULL; |
| } |
| |
| fc_fill_fc_hdr(fp, r_ctl, did, fc_host_port_id(lport->host), fh_type, |
| FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); |
| |
| return lport->tt.exch_seq_send(lport, fp, resp, NULL, arg, timer_msec); |
| } |
| |
| int fc_elsct_init(struct fc_lport *lport) |
| { |
| if (!lport->tt.elsct_send) |
| lport->tt.elsct_send = fc_elsct_send; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(fc_elsct_init); |
| |
| /** |
| * fc_els_resp_type() - return string describing ELS response for debug. |
| * @fp: frame pointer with possible error code. |
| */ |
| const char *fc_els_resp_type(struct fc_frame *fp) |
| { |
| const char *msg; |
| if (IS_ERR(fp)) { |
| switch (-PTR_ERR(fp)) { |
| case FC_NO_ERR: |
| msg = "response no error"; |
| break; |
| case FC_EX_TIMEOUT: |
| msg = "response timeout"; |
| break; |
| case FC_EX_CLOSED: |
| msg = "response closed"; |
| break; |
| default: |
| msg = "response unknown error"; |
| break; |
| } |
| } else { |
| switch (fc_frame_payload_op(fp)) { |
| case ELS_LS_ACC: |
| msg = "accept"; |
| break; |
| case ELS_LS_RJT: |
| msg = "reject"; |
| break; |
| default: |
| msg = "response unknown ELS"; |
| break; |
| } |
| } |
| return msg; |
| } |