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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | /* * 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 <linux/export.h> #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; } |