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