/* * 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() - 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_send(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_send); /** * fc_elsct_init() - Initialize the ELS/CT layer * @lport: The local port to initialize the ELS/CT layer for */ 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 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; }