1 /* 2 * Copyright (c) 2010 Cisco Systems, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 */ 17 18 /* XXX TBD some includes may be extraneous */ 19 20 #include <linux/module.h> 21 #include <linux/moduleparam.h> 22 #include <generated/utsrelease.h> 23 #include <linux/utsname.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/kthread.h> 27 #include <linux/types.h> 28 #include <linux/string.h> 29 #include <linux/configfs.h> 30 #include <linux/ctype.h> 31 #include <linux/hash.h> 32 #include <asm/unaligned.h> 33 #include <scsi/scsi.h> 34 #include <scsi/scsi_host.h> 35 #include <scsi/scsi_device.h> 36 #include <scsi/scsi_cmnd.h> 37 #include <scsi/scsi_tcq.h> 38 #include <scsi/libfc.h> 39 #include <scsi/fc_encode.h> 40 41 #include <target/target_core_base.h> 42 #include <target/target_core_transport.h> 43 #include <target/target_core_fabric_ops.h> 44 #include <target/target_core_device.h> 45 #include <target/target_core_tpg.h> 46 #include <target/target_core_configfs.h> 47 #include <target/target_core_tmr.h> 48 #include <target/configfs_macros.h> 49 50 #include "tcm_fc.h" 51 52 /* 53 * Dump cmd state for debugging. 54 */ 55 void ft_dump_cmd(struct ft_cmd *cmd, const char *caller) 56 { 57 struct fc_exch *ep; 58 struct fc_seq *sp; 59 struct se_cmd *se_cmd; 60 struct scatterlist *sg; 61 int count; 62 63 se_cmd = &cmd->se_cmd; 64 pr_debug("%s: cmd %p sess %p seq %p se_cmd %p\n", 65 caller, cmd, cmd->sess, cmd->seq, se_cmd); 66 pr_debug("%s: cmd %p cdb %p\n", 67 caller, cmd, cmd->cdb); 68 pr_debug("%s: cmd %p lun %d\n", caller, cmd, cmd->lun); 69 70 pr_debug("%s: cmd %p data_nents %u len %u se_cmd_flags <0x%x>\n", 71 caller, cmd, se_cmd->t_data_nents, 72 se_cmd->data_length, se_cmd->se_cmd_flags); 73 74 for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, count) 75 pr_debug("%s: cmd %p sg %p page %p " 76 "len 0x%x off 0x%x\n", 77 caller, cmd, sg, 78 sg_page(sg), sg->length, sg->offset); 79 80 sp = cmd->seq; 81 if (sp) { 82 ep = fc_seq_exch(sp); 83 pr_debug("%s: cmd %p sid %x did %x " 84 "ox_id %x rx_id %x seq_id %x e_stat %x\n", 85 caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid, 86 sp->id, ep->esb_stat); 87 } 88 print_hex_dump(KERN_INFO, "ft_dump_cmd ", DUMP_PREFIX_NONE, 89 16, 4, cmd->cdb, MAX_COMMAND_SIZE, 0); 90 } 91 92 static void ft_free_cmd(struct ft_cmd *cmd) 93 { 94 struct fc_frame *fp; 95 struct fc_lport *lport; 96 97 if (!cmd) 98 return; 99 fp = cmd->req_frame; 100 lport = fr_dev(fp); 101 if (fr_seq(fp)) 102 lport->tt.seq_release(fr_seq(fp)); 103 fc_frame_free(fp); 104 ft_sess_put(cmd->sess); /* undo get from lookup at recv */ 105 kfree(cmd); 106 } 107 108 void ft_release_cmd(struct se_cmd *se_cmd) 109 { 110 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 111 112 ft_free_cmd(cmd); 113 } 114 115 int ft_check_stop_free(struct se_cmd *se_cmd) 116 { 117 transport_generic_free_cmd(se_cmd, 0); 118 return 1; 119 } 120 121 /* 122 * Send response. 123 */ 124 int ft_queue_status(struct se_cmd *se_cmd) 125 { 126 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 127 struct fc_frame *fp; 128 struct fcp_resp_with_ext *fcp; 129 struct fc_lport *lport; 130 struct fc_exch *ep; 131 size_t len; 132 133 ft_dump_cmd(cmd, __func__); 134 ep = fc_seq_exch(cmd->seq); 135 lport = ep->lp; 136 len = sizeof(*fcp) + se_cmd->scsi_sense_length; 137 fp = fc_frame_alloc(lport, len); 138 if (!fp) { 139 /* XXX shouldn't just drop it - requeue and retry? */ 140 return 0; 141 } 142 fcp = fc_frame_payload_get(fp, len); 143 memset(fcp, 0, len); 144 fcp->resp.fr_status = se_cmd->scsi_status; 145 146 len = se_cmd->scsi_sense_length; 147 if (len) { 148 fcp->resp.fr_flags |= FCP_SNS_LEN_VAL; 149 fcp->ext.fr_sns_len = htonl(len); 150 memcpy((fcp + 1), se_cmd->sense_buffer, len); 151 } 152 153 /* 154 * Test underflow and overflow with one mask. Usually both are off. 155 * Bidirectional commands are not handled yet. 156 */ 157 if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) { 158 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) 159 fcp->resp.fr_flags |= FCP_RESID_OVER; 160 else 161 fcp->resp.fr_flags |= FCP_RESID_UNDER; 162 fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count); 163 } 164 165 /* 166 * Send response. 167 */ 168 cmd->seq = lport->tt.seq_start_next(cmd->seq); 169 fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP, 170 FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0); 171 172 lport->tt.seq_send(lport, cmd->seq, fp); 173 lport->tt.exch_done(cmd->seq); 174 return 0; 175 } 176 177 int ft_write_pending_status(struct se_cmd *se_cmd) 178 { 179 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 180 181 return cmd->write_data_len != se_cmd->data_length; 182 } 183 184 /* 185 * Send TX_RDY (transfer ready). 186 */ 187 int ft_write_pending(struct se_cmd *se_cmd) 188 { 189 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 190 struct fc_frame *fp; 191 struct fcp_txrdy *txrdy; 192 struct fc_lport *lport; 193 struct fc_exch *ep; 194 struct fc_frame_header *fh; 195 u32 f_ctl; 196 197 ft_dump_cmd(cmd, __func__); 198 199 ep = fc_seq_exch(cmd->seq); 200 lport = ep->lp; 201 fp = fc_frame_alloc(lport, sizeof(*txrdy)); 202 if (!fp) 203 return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; 204 205 txrdy = fc_frame_payload_get(fp, sizeof(*txrdy)); 206 memset(txrdy, 0, sizeof(*txrdy)); 207 txrdy->ft_burst_len = htonl(se_cmd->data_length); 208 209 cmd->seq = lport->tt.seq_start_next(cmd->seq); 210 fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP, 211 FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); 212 213 fh = fc_frame_header_get(fp); 214 f_ctl = ntoh24(fh->fh_f_ctl); 215 216 /* Only if it is 'Exchange Responder' */ 217 if (f_ctl & FC_FC_EX_CTX) { 218 /* Target is 'exchange responder' and sending XFER_READY 219 * to 'exchange initiator (initiator)' 220 */ 221 if ((ep->xid <= lport->lro_xid) && 222 (fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) { 223 if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 224 /* 225 * cmd may have been broken up into multiple 226 * tasks. Link their sgs together so we can 227 * operate on them all at once. 228 */ 229 transport_do_task_sg_chain(se_cmd); 230 cmd->sg = se_cmd->t_tasks_sg_chained; 231 cmd->sg_cnt = 232 se_cmd->t_tasks_sg_chained_no; 233 } 234 if (cmd->sg && lport->tt.ddp_target(lport, ep->xid, 235 cmd->sg, 236 cmd->sg_cnt)) 237 cmd->was_ddp_setup = 1; 238 } 239 } 240 lport->tt.seq_send(lport, cmd->seq, fp); 241 return 0; 242 } 243 244 u32 ft_get_task_tag(struct se_cmd *se_cmd) 245 { 246 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 247 248 return fc_seq_exch(cmd->seq)->rxid; 249 } 250 251 int ft_get_cmd_state(struct se_cmd *se_cmd) 252 { 253 return 0; 254 } 255 256 int ft_is_state_remove(struct se_cmd *se_cmd) 257 { 258 return 0; /* XXX TBD */ 259 } 260 261 /* 262 * FC sequence response handler for follow-on sequences (data) and aborts. 263 */ 264 static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg) 265 { 266 struct ft_cmd *cmd = arg; 267 struct fc_frame_header *fh; 268 269 if (IS_ERR(fp)) { 270 /* XXX need to find cmd if queued */ 271 cmd->seq = NULL; 272 transport_generic_free_cmd(&cmd->se_cmd, 0); 273 return; 274 } 275 276 fh = fc_frame_header_get(fp); 277 278 switch (fh->fh_r_ctl) { 279 case FC_RCTL_DD_SOL_DATA: /* write data */ 280 ft_recv_write_data(cmd, fp); 281 break; 282 case FC_RCTL_DD_UNSOL_CTL: /* command */ 283 case FC_RCTL_DD_SOL_CTL: /* transfer ready */ 284 case FC_RCTL_DD_DATA_DESC: /* transfer ready */ 285 default: 286 pr_debug("%s: unhandled frame r_ctl %x\n", 287 __func__, fh->fh_r_ctl); 288 ft_invl_hw_context(cmd); 289 fc_frame_free(fp); 290 transport_generic_free_cmd(&cmd->se_cmd, 0); 291 break; 292 } 293 } 294 295 /* 296 * Send a FCP response including SCSI status and optional FCP rsp_code. 297 * status is SAM_STAT_GOOD (zero) iff code is valid. 298 * This is used in error cases, such as allocation failures. 299 */ 300 static void ft_send_resp_status(struct fc_lport *lport, 301 const struct fc_frame *rx_fp, 302 u32 status, enum fcp_resp_rsp_codes code) 303 { 304 struct fc_frame *fp; 305 struct fc_seq *sp; 306 const struct fc_frame_header *fh; 307 size_t len; 308 struct fcp_resp_with_ext *fcp; 309 struct fcp_resp_rsp_info *info; 310 311 fh = fc_frame_header_get(rx_fp); 312 pr_debug("FCP error response: did %x oxid %x status %x code %x\n", 313 ntoh24(fh->fh_s_id), ntohs(fh->fh_ox_id), status, code); 314 len = sizeof(*fcp); 315 if (status == SAM_STAT_GOOD) 316 len += sizeof(*info); 317 fp = fc_frame_alloc(lport, len); 318 if (!fp) 319 return; 320 fcp = fc_frame_payload_get(fp, len); 321 memset(fcp, 0, len); 322 fcp->resp.fr_status = status; 323 if (status == SAM_STAT_GOOD) { 324 fcp->ext.fr_rsp_len = htonl(sizeof(*info)); 325 fcp->resp.fr_flags |= FCP_RSP_LEN_VAL; 326 info = (struct fcp_resp_rsp_info *)(fcp + 1); 327 info->rsp_code = code; 328 } 329 330 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0); 331 sp = fr_seq(fp); 332 if (sp) 333 lport->tt.seq_send(lport, sp, fp); 334 else 335 lport->tt.frame_send(lport, fp); 336 } 337 338 /* 339 * Send error or task management response. 340 */ 341 static void ft_send_resp_code(struct ft_cmd *cmd, 342 enum fcp_resp_rsp_codes code) 343 { 344 ft_send_resp_status(cmd->sess->tport->lport, 345 cmd->req_frame, SAM_STAT_GOOD, code); 346 } 347 348 349 /* 350 * Send error or task management response. 351 * Always frees the cmd and associated state. 352 */ 353 static void ft_send_resp_code_and_free(struct ft_cmd *cmd, 354 enum fcp_resp_rsp_codes code) 355 { 356 ft_send_resp_code(cmd, code); 357 ft_free_cmd(cmd); 358 } 359 360 /* 361 * Handle Task Management Request. 362 */ 363 static void ft_send_tm(struct ft_cmd *cmd) 364 { 365 struct se_tmr_req *tmr; 366 struct fcp_cmnd *fcp; 367 struct ft_sess *sess; 368 u8 tm_func; 369 370 fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp)); 371 372 switch (fcp->fc_tm_flags) { 373 case FCP_TMF_LUN_RESET: 374 tm_func = TMR_LUN_RESET; 375 break; 376 case FCP_TMF_TGT_RESET: 377 tm_func = TMR_TARGET_WARM_RESET; 378 break; 379 case FCP_TMF_CLR_TASK_SET: 380 tm_func = TMR_CLEAR_TASK_SET; 381 break; 382 case FCP_TMF_ABT_TASK_SET: 383 tm_func = TMR_ABORT_TASK_SET; 384 break; 385 case FCP_TMF_CLR_ACA: 386 tm_func = TMR_CLEAR_ACA; 387 break; 388 default: 389 /* 390 * FCP4r01 indicates having a combination of 391 * tm_flags set is invalid. 392 */ 393 pr_debug("invalid FCP tm_flags %x\n", fcp->fc_tm_flags); 394 ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID); 395 return; 396 } 397 398 pr_debug("alloc tm cmd fn %d\n", tm_func); 399 tmr = core_tmr_alloc_req(&cmd->se_cmd, cmd, tm_func, GFP_KERNEL); 400 if (!tmr) { 401 pr_debug("alloc failed\n"); 402 ft_send_resp_code_and_free(cmd, FCP_TMF_FAILED); 403 return; 404 } 405 cmd->se_cmd.se_tmr_req = tmr; 406 407 switch (fcp->fc_tm_flags) { 408 case FCP_TMF_LUN_RESET: 409 cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun); 410 if (transport_lookup_tmr_lun(&cmd->se_cmd, cmd->lun) < 0) { 411 /* 412 * Make sure to clean up newly allocated TMR request 413 * since "unable to handle TMR request because failed 414 * to get to LUN" 415 */ 416 pr_debug("Failed to get LUN for TMR func %d, " 417 "se_cmd %p, unpacked_lun %d\n", 418 tm_func, &cmd->se_cmd, cmd->lun); 419 ft_dump_cmd(cmd, __func__); 420 sess = cmd->sess; 421 transport_send_check_condition_and_sense(&cmd->se_cmd, 422 cmd->se_cmd.scsi_sense_reason, 0); 423 transport_generic_free_cmd(&cmd->se_cmd, 0); 424 ft_sess_put(sess); 425 return; 426 } 427 break; 428 case FCP_TMF_TGT_RESET: 429 case FCP_TMF_CLR_TASK_SET: 430 case FCP_TMF_ABT_TASK_SET: 431 case FCP_TMF_CLR_ACA: 432 break; 433 default: 434 return; 435 } 436 transport_generic_handle_tmr(&cmd->se_cmd); 437 } 438 439 /* 440 * Send status from completed task management request. 441 */ 442 int ft_queue_tm_resp(struct se_cmd *se_cmd) 443 { 444 struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); 445 struct se_tmr_req *tmr = se_cmd->se_tmr_req; 446 enum fcp_resp_rsp_codes code; 447 448 switch (tmr->response) { 449 case TMR_FUNCTION_COMPLETE: 450 code = FCP_TMF_CMPL; 451 break; 452 case TMR_LUN_DOES_NOT_EXIST: 453 code = FCP_TMF_INVALID_LUN; 454 break; 455 case TMR_FUNCTION_REJECTED: 456 code = FCP_TMF_REJECTED; 457 break; 458 case TMR_TASK_DOES_NOT_EXIST: 459 case TMR_TASK_STILL_ALLEGIANT: 460 case TMR_TASK_FAILOVER_NOT_SUPPORTED: 461 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: 462 case TMR_FUNCTION_AUTHORIZATION_FAILED: 463 default: 464 code = FCP_TMF_FAILED; 465 break; 466 } 467 pr_debug("tmr fn %d resp %d fcp code %d\n", 468 tmr->function, tmr->response, code); 469 ft_send_resp_code(cmd, code); 470 return 0; 471 } 472 473 static void ft_send_work(struct work_struct *work); 474 475 /* 476 * Handle incoming FCP command. 477 */ 478 static void ft_recv_cmd(struct ft_sess *sess, struct fc_frame *fp) 479 { 480 struct ft_cmd *cmd; 481 struct fc_lport *lport = sess->tport->lport; 482 483 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 484 if (!cmd) 485 goto busy; 486 cmd->sess = sess; 487 cmd->seq = lport->tt.seq_assign(lport, fp); 488 if (!cmd->seq) { 489 kfree(cmd); 490 goto busy; 491 } 492 cmd->req_frame = fp; /* hold frame during cmd */ 493 494 INIT_WORK(&cmd->work, ft_send_work); 495 queue_work(sess->tport->tpg->workqueue, &cmd->work); 496 return; 497 498 busy: 499 pr_debug("cmd or seq allocation failure - sending BUSY\n"); 500 ft_send_resp_status(lport, fp, SAM_STAT_BUSY, 0); 501 fc_frame_free(fp); 502 ft_sess_put(sess); /* undo get from lookup */ 503 } 504 505 506 /* 507 * Handle incoming FCP frame. 508 * Caller has verified that the frame is type FCP. 509 */ 510 void ft_recv_req(struct ft_sess *sess, struct fc_frame *fp) 511 { 512 struct fc_frame_header *fh = fc_frame_header_get(fp); 513 514 switch (fh->fh_r_ctl) { 515 case FC_RCTL_DD_UNSOL_CMD: /* command */ 516 ft_recv_cmd(sess, fp); 517 break; 518 case FC_RCTL_DD_SOL_DATA: /* write data */ 519 case FC_RCTL_DD_UNSOL_CTL: 520 case FC_RCTL_DD_SOL_CTL: 521 case FC_RCTL_DD_DATA_DESC: /* transfer ready */ 522 case FC_RCTL_ELS4_REQ: /* SRR, perhaps */ 523 default: 524 pr_debug("%s: unhandled frame r_ctl %x\n", 525 __func__, fh->fh_r_ctl); 526 fc_frame_free(fp); 527 ft_sess_put(sess); /* undo get from lookup */ 528 break; 529 } 530 } 531 532 /* 533 * Send new command to target. 534 */ 535 static void ft_send_work(struct work_struct *work) 536 { 537 struct ft_cmd *cmd = container_of(work, struct ft_cmd, work); 538 struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame); 539 struct se_cmd *se_cmd; 540 struct fcp_cmnd *fcp; 541 int data_dir = 0; 542 u32 data_len; 543 int task_attr; 544 int ret; 545 546 fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp)); 547 if (!fcp) 548 goto err; 549 550 if (fcp->fc_flags & FCP_CFL_LEN_MASK) 551 goto err; /* not handling longer CDBs yet */ 552 553 if (fcp->fc_tm_flags) { 554 task_attr = FCP_PTA_SIMPLE; 555 data_dir = DMA_NONE; 556 data_len = 0; 557 } else { 558 switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) { 559 case 0: 560 data_dir = DMA_NONE; 561 break; 562 case FCP_CFL_RDDATA: 563 data_dir = DMA_FROM_DEVICE; 564 break; 565 case FCP_CFL_WRDATA: 566 data_dir = DMA_TO_DEVICE; 567 break; 568 case FCP_CFL_WRDATA | FCP_CFL_RDDATA: 569 goto err; /* TBD not supported by tcm_fc yet */ 570 } 571 /* 572 * Locate the SAM Task Attr from fc_pri_ta 573 */ 574 switch (fcp->fc_pri_ta & FCP_PTA_MASK) { 575 case FCP_PTA_HEADQ: 576 task_attr = MSG_HEAD_TAG; 577 break; 578 case FCP_PTA_ORDERED: 579 task_attr = MSG_ORDERED_TAG; 580 break; 581 case FCP_PTA_ACA: 582 task_attr = MSG_ACA_TAG; 583 break; 584 case FCP_PTA_SIMPLE: /* Fallthrough */ 585 default: 586 task_attr = MSG_SIMPLE_TAG; 587 } 588 589 590 task_attr = fcp->fc_pri_ta & FCP_PTA_MASK; 591 data_len = ntohl(fcp->fc_dl); 592 cmd->cdb = fcp->fc_cdb; 593 } 594 595 se_cmd = &cmd->se_cmd; 596 /* 597 * Initialize struct se_cmd descriptor from target_core_mod 598 * infrastructure 599 */ 600 transport_init_se_cmd(se_cmd, &ft_configfs->tf_ops, cmd->sess->se_sess, 601 data_len, data_dir, task_attr, 602 &cmd->ft_sense_buffer[0]); 603 /* 604 * Check for FCP task management flags 605 */ 606 if (fcp->fc_tm_flags) { 607 ft_send_tm(cmd); 608 return; 609 } 610 611 fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd); 612 613 cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun); 614 ret = transport_lookup_cmd_lun(&cmd->se_cmd, cmd->lun); 615 if (ret < 0) { 616 ft_dump_cmd(cmd, __func__); 617 transport_send_check_condition_and_sense(&cmd->se_cmd, 618 cmd->se_cmd.scsi_sense_reason, 0); 619 return; 620 } 621 622 ret = transport_generic_allocate_tasks(se_cmd, cmd->cdb); 623 624 pr_debug("r_ctl %x alloc task ret %d\n", fh->fh_r_ctl, ret); 625 ft_dump_cmd(cmd, __func__); 626 627 if (ret == -ENOMEM) { 628 transport_send_check_condition_and_sense(se_cmd, 629 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); 630 transport_generic_free_cmd(se_cmd, 0); 631 return; 632 } 633 if (ret == -EINVAL) { 634 if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) 635 ft_queue_status(se_cmd); 636 else 637 transport_send_check_condition_and_sense(se_cmd, 638 se_cmd->scsi_sense_reason, 0); 639 transport_generic_free_cmd(se_cmd, 0); 640 return; 641 } 642 transport_handle_cdb_direct(se_cmd); 643 return; 644 645 err: 646 ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID); 647 } 648