| /* |
| * 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_els2.h> |
| #include <scsi/libfc2.h> |
| #include <scsi/fc_encode2.h> |
| |
| /** |
| * fc_elsct_send2() - Send an ELS or CT frame |
| * @lport: The local port to send the frame on |
| * @did: The destination ID for the frame |
| * @fp: The frame to be sent |
| * @op: The operational code |
| * @resp: The callback routine when the response is received |
| * @arg: The argument to pass to the response callback routine |
| * @timer_msec: The timeout period for the frame (in msecs) |
| */ |
| struct fc_seq *fc_elsct_send2(struct fc_lport *lport, u32 did, |
| struct fc_frame *fp, unsigned int op, |
| void (*resp)(struct fc_seq *, |
| struct fc_frame *, |
| void *), |
| 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, lport->port_id, fh_type, |
| FC_FCTL_REQ, 0); |
| |
| return lport->tt.exch_seq_send(lport, fp, resp, NULL, arg, timer_msec); |
| } |
| EXPORT_SYMBOL(fc_elsct_send2); |
| |
| /** |
| * fc_elsct_init2() - Initialize the ELS/CT layer |
| * @lport: The local port to initialize the ELS/CT layer for |
| */ |
| int fc_elsct_init2(struct fc_lport *lport) |
| { |
| if (!lport->tt.elsct_send) |
| lport->tt.elsct_send = fc_elsct_send2; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(fc_elsct_init2); |
| |
| /** |
| * fc_els_resp_type() - Return a string describing the ELS response |
| * @fp: The frame pointer or possible error code |
| */ |
| const char *fc_els_resp_type(struct fc_frame *fp) |
| { |
| const char *msg; |
| struct fc_frame_header *fh; |
| struct fc_ct_hdr *ct; |
| |
| 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 { |
| fh = fc_frame_header_get(fp); |
| switch (fh->fh_type) { |
| case FC_TYPE_ELS: |
| 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; |
| } |
| break; |
| case FC_TYPE_CT: |
| ct = fc_frame_payload_get(fp, sizeof(*ct)); |
| if (ct) { |
| switch (ntohs(ct->ct_cmd)) { |
| case FC_FS_ACC: |
| msg = "CT accept"; |
| break; |
| case FC_FS_RJT: |
| msg = "CT reject"; |
| break; |
| default: |
| msg = "response unknown CT"; |
| break; |
| } |
| } else { |
| msg = "short CT response"; |
| } |
| break; |
| default: |
| msg = "response not ELS or CT"; |
| break; |
| } |
| } |
| return msg; |
| } |
