iscsi_target_util.c revision 9864ca9d27f75d2716d09dd02b3d62d241194576
1/******************************************************************************* 2 * This file contains the iSCSI Target specific utility functions. 3 * 4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5 * 6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7 * 8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 ******************************************************************************/ 20 21#include <linux/list.h> 22#include <scsi/scsi_tcq.h> 23#include <scsi/iscsi_proto.h> 24#include <target/target_core_base.h> 25#include <target/target_core_fabric.h> 26#include <target/target_core_configfs.h> 27#include <target/iscsi/iscsi_transport.h> 28 29#include "iscsi_target_core.h" 30#include "iscsi_target_parameters.h" 31#include "iscsi_target_seq_pdu_list.h" 32#include "iscsi_target_datain_values.h" 33#include "iscsi_target_erl0.h" 34#include "iscsi_target_erl1.h" 35#include "iscsi_target_erl2.h" 36#include "iscsi_target_tpg.h" 37#include "iscsi_target_tq.h" 38#include "iscsi_target_util.h" 39#include "iscsi_target.h" 40 41#define PRINT_BUFF(buff, len) \ 42{ \ 43 int zzz; \ 44 \ 45 pr_debug("%d:\n", __LINE__); \ 46 for (zzz = 0; zzz < len; zzz++) { \ 47 if (zzz % 16 == 0) { \ 48 if (zzz) \ 49 pr_debug("\n"); \ 50 pr_debug("%4i: ", zzz); \ 51 } \ 52 pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 53 } \ 54 if ((len + 1) % 16) \ 55 pr_debug("\n"); \ 56} 57 58extern struct list_head g_tiqn_list; 59extern spinlock_t tiqn_lock; 60 61/* 62 * Called with cmd->r2t_lock held. 63 */ 64int iscsit_add_r2t_to_list( 65 struct iscsi_cmd *cmd, 66 u32 offset, 67 u32 xfer_len, 68 int recovery, 69 u32 r2t_sn) 70{ 71 struct iscsi_r2t *r2t; 72 73 r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 74 if (!r2t) { 75 pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 76 return -1; 77 } 78 INIT_LIST_HEAD(&r2t->r2t_list); 79 80 r2t->recovery_r2t = recovery; 81 r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 82 r2t->offset = offset; 83 r2t->xfer_len = xfer_len; 84 list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 85 spin_unlock_bh(&cmd->r2t_lock); 86 87 iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 88 89 spin_lock_bh(&cmd->r2t_lock); 90 return 0; 91} 92 93struct iscsi_r2t *iscsit_get_r2t_for_eos( 94 struct iscsi_cmd *cmd, 95 u32 offset, 96 u32 length) 97{ 98 struct iscsi_r2t *r2t; 99 100 spin_lock_bh(&cmd->r2t_lock); 101 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 102 if ((r2t->offset <= offset) && 103 (r2t->offset + r2t->xfer_len) >= (offset + length)) { 104 spin_unlock_bh(&cmd->r2t_lock); 105 return r2t; 106 } 107 } 108 spin_unlock_bh(&cmd->r2t_lock); 109 110 pr_err("Unable to locate R2T for Offset: %u, Length:" 111 " %u\n", offset, length); 112 return NULL; 113} 114 115struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 116{ 117 struct iscsi_r2t *r2t; 118 119 spin_lock_bh(&cmd->r2t_lock); 120 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 121 if (!r2t->sent_r2t) { 122 spin_unlock_bh(&cmd->r2t_lock); 123 return r2t; 124 } 125 } 126 spin_unlock_bh(&cmd->r2t_lock); 127 128 pr_err("Unable to locate next R2T to send for ITT:" 129 " 0x%08x.\n", cmd->init_task_tag); 130 return NULL; 131} 132 133/* 134 * Called with cmd->r2t_lock held. 135 */ 136void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 137{ 138 list_del(&r2t->r2t_list); 139 kmem_cache_free(lio_r2t_cache, r2t); 140} 141 142void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 143{ 144 struct iscsi_r2t *r2t, *r2t_tmp; 145 146 spin_lock_bh(&cmd->r2t_lock); 147 list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 148 iscsit_free_r2t(r2t, cmd); 149 spin_unlock_bh(&cmd->r2t_lock); 150} 151 152struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 153{ 154 struct iscsi_cmd *cmd; 155 156 cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); 157 if (!cmd) 158 return NULL; 159 160 cmd->release_cmd = &iscsit_release_cmd; 161 return cmd; 162} 163 164/* 165 * May be called from software interrupt (timer) context for allocating 166 * iSCSI NopINs. 167 */ 168struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 169{ 170 struct iscsi_cmd *cmd; 171 172 cmd = conn->conn_transport->iscsit_alloc_cmd(conn, gfp_mask); 173 if (!cmd) { 174 pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); 175 return NULL; 176 } 177 cmd->conn = conn; 178 INIT_LIST_HEAD(&cmd->i_conn_node); 179 INIT_LIST_HEAD(&cmd->datain_list); 180 INIT_LIST_HEAD(&cmd->cmd_r2t_list); 181 init_completion(&cmd->reject_comp); 182 spin_lock_init(&cmd->datain_lock); 183 spin_lock_init(&cmd->dataout_timeout_lock); 184 spin_lock_init(&cmd->istate_lock); 185 spin_lock_init(&cmd->error_lock); 186 spin_lock_init(&cmd->r2t_lock); 187 188 return cmd; 189} 190EXPORT_SYMBOL(iscsit_allocate_cmd); 191 192struct iscsi_seq *iscsit_get_seq_holder_for_datain( 193 struct iscsi_cmd *cmd, 194 u32 seq_send_order) 195{ 196 u32 i; 197 198 for (i = 0; i < cmd->seq_count; i++) 199 if (cmd->seq_list[i].seq_send_order == seq_send_order) 200 return &cmd->seq_list[i]; 201 202 return NULL; 203} 204 205struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 206{ 207 u32 i; 208 209 if (!cmd->seq_list) { 210 pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 211 return NULL; 212 } 213 214 for (i = 0; i < cmd->seq_count; i++) { 215 if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 216 continue; 217 if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 218 cmd->seq_send_order++; 219 return &cmd->seq_list[i]; 220 } 221 } 222 223 return NULL; 224} 225 226struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 227 struct iscsi_cmd *cmd, 228 u32 r2t_sn) 229{ 230 struct iscsi_r2t *r2t; 231 232 spin_lock_bh(&cmd->r2t_lock); 233 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 234 if (r2t->r2t_sn == r2t_sn) { 235 spin_unlock_bh(&cmd->r2t_lock); 236 return r2t; 237 } 238 } 239 spin_unlock_bh(&cmd->r2t_lock); 240 241 return NULL; 242} 243 244static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 245{ 246 int ret; 247 248 /* 249 * This is the proper method of checking received CmdSN against 250 * ExpCmdSN and MaxCmdSN values, as well as accounting for out 251 * or order CmdSNs due to multiple connection sessions and/or 252 * CRC failures. 253 */ 254 if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 255 pr_err("Received CmdSN: 0x%08x is greater than" 256 " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, 257 sess->max_cmd_sn); 258 ret = CMDSN_ERROR_CANNOT_RECOVER; 259 260 } else if (cmdsn == sess->exp_cmd_sn) { 261 sess->exp_cmd_sn++; 262 pr_debug("Received CmdSN matches ExpCmdSN," 263 " incremented ExpCmdSN to: 0x%08x\n", 264 sess->exp_cmd_sn); 265 ret = CMDSN_NORMAL_OPERATION; 266 267 } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 268 pr_debug("Received CmdSN: 0x%08x is greater" 269 " than ExpCmdSN: 0x%08x, not acknowledging.\n", 270 cmdsn, sess->exp_cmd_sn); 271 ret = CMDSN_HIGHER_THAN_EXP; 272 273 } else { 274 pr_err("Received CmdSN: 0x%08x is less than" 275 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 276 sess->exp_cmd_sn); 277 ret = CMDSN_LOWER_THAN_EXP; 278 } 279 280 return ret; 281} 282 283/* 284 * Commands may be received out of order if MC/S is in use. 285 * Ensure they are executed in CmdSN order. 286 */ 287int iscsit_sequence_cmd( 288 struct iscsi_conn *conn, 289 struct iscsi_cmd *cmd, 290 __be32 cmdsn) 291{ 292 int ret; 293 int cmdsn_ret; 294 295 mutex_lock(&conn->sess->cmdsn_mutex); 296 297 cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 298 switch (cmdsn_ret) { 299 case CMDSN_NORMAL_OPERATION: 300 ret = iscsit_execute_cmd(cmd, 0); 301 if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 302 iscsit_execute_ooo_cmdsns(conn->sess); 303 break; 304 case CMDSN_HIGHER_THAN_EXP: 305 ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 306 break; 307 case CMDSN_LOWER_THAN_EXP: 308 cmd->i_state = ISTATE_REMOVE; 309 iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 310 ret = cmdsn_ret; 311 break; 312 default: 313 ret = cmdsn_ret; 314 break; 315 } 316 mutex_unlock(&conn->sess->cmdsn_mutex); 317 318 return ret; 319} 320EXPORT_SYMBOL(iscsit_sequence_cmd); 321 322int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 323{ 324 struct iscsi_conn *conn = cmd->conn; 325 struct se_cmd *se_cmd = &cmd->se_cmd; 326 struct iscsi_data *hdr = (struct iscsi_data *) buf; 327 u32 payload_length = ntoh24(hdr->dlength); 328 329 if (conn->sess->sess_ops->InitialR2T) { 330 pr_err("Received unexpected unsolicited data" 331 " while InitialR2T=Yes, protocol error.\n"); 332 transport_send_check_condition_and_sense(se_cmd, 333 TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 334 return -1; 335 } 336 337 if ((cmd->first_burst_len + payload_length) > 338 conn->sess->sess_ops->FirstBurstLength) { 339 pr_err("Total %u bytes exceeds FirstBurstLength: %u" 340 " for this Unsolicited DataOut Burst.\n", 341 (cmd->first_burst_len + payload_length), 342 conn->sess->sess_ops->FirstBurstLength); 343 transport_send_check_condition_and_sense(se_cmd, 344 TCM_INCORRECT_AMOUNT_OF_DATA, 0); 345 return -1; 346 } 347 348 if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 349 return 0; 350 351 if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 352 ((cmd->first_burst_len + payload_length) != 353 conn->sess->sess_ops->FirstBurstLength)) { 354 pr_err("Unsolicited non-immediate data received %u" 355 " does not equal FirstBurstLength: %u, and does" 356 " not equal ExpXferLen %u.\n", 357 (cmd->first_burst_len + payload_length), 358 conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 359 transport_send_check_condition_and_sense(se_cmd, 360 TCM_INCORRECT_AMOUNT_OF_DATA, 0); 361 return -1; 362 } 363 return 0; 364} 365 366struct iscsi_cmd *iscsit_find_cmd_from_itt( 367 struct iscsi_conn *conn, 368 itt_t init_task_tag) 369{ 370 struct iscsi_cmd *cmd; 371 372 spin_lock_bh(&conn->cmd_lock); 373 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 374 if (cmd->init_task_tag == init_task_tag) { 375 spin_unlock_bh(&conn->cmd_lock); 376 return cmd; 377 } 378 } 379 spin_unlock_bh(&conn->cmd_lock); 380 381 pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 382 init_task_tag, conn->cid); 383 return NULL; 384} 385 386struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 387 struct iscsi_conn *conn, 388 itt_t init_task_tag, 389 u32 length) 390{ 391 struct iscsi_cmd *cmd; 392 393 spin_lock_bh(&conn->cmd_lock); 394 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 395 if (cmd->init_task_tag == init_task_tag) { 396 spin_unlock_bh(&conn->cmd_lock); 397 return cmd; 398 } 399 } 400 spin_unlock_bh(&conn->cmd_lock); 401 402 pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 403 " dumping payload\n", init_task_tag, conn->cid); 404 if (length) 405 iscsit_dump_data_payload(conn, length, 1); 406 407 return NULL; 408} 409 410struct iscsi_cmd *iscsit_find_cmd_from_ttt( 411 struct iscsi_conn *conn, 412 u32 targ_xfer_tag) 413{ 414 struct iscsi_cmd *cmd = NULL; 415 416 spin_lock_bh(&conn->cmd_lock); 417 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 418 if (cmd->targ_xfer_tag == targ_xfer_tag) { 419 spin_unlock_bh(&conn->cmd_lock); 420 return cmd; 421 } 422 } 423 spin_unlock_bh(&conn->cmd_lock); 424 425 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 426 targ_xfer_tag, conn->cid); 427 return NULL; 428} 429 430int iscsit_find_cmd_for_recovery( 431 struct iscsi_session *sess, 432 struct iscsi_cmd **cmd_ptr, 433 struct iscsi_conn_recovery **cr_ptr, 434 itt_t init_task_tag) 435{ 436 struct iscsi_cmd *cmd = NULL; 437 struct iscsi_conn_recovery *cr; 438 /* 439 * Scan through the inactive connection recovery list's command list. 440 * If init_task_tag matches the command is still alligent. 441 */ 442 spin_lock(&sess->cr_i_lock); 443 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 444 spin_lock(&cr->conn_recovery_cmd_lock); 445 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 446 if (cmd->init_task_tag == init_task_tag) { 447 spin_unlock(&cr->conn_recovery_cmd_lock); 448 spin_unlock(&sess->cr_i_lock); 449 450 *cr_ptr = cr; 451 *cmd_ptr = cmd; 452 return -2; 453 } 454 } 455 spin_unlock(&cr->conn_recovery_cmd_lock); 456 } 457 spin_unlock(&sess->cr_i_lock); 458 /* 459 * Scan through the active connection recovery list's command list. 460 * If init_task_tag matches the command is ready to be reassigned. 461 */ 462 spin_lock(&sess->cr_a_lock); 463 list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 464 spin_lock(&cr->conn_recovery_cmd_lock); 465 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 466 if (cmd->init_task_tag == init_task_tag) { 467 spin_unlock(&cr->conn_recovery_cmd_lock); 468 spin_unlock(&sess->cr_a_lock); 469 470 *cr_ptr = cr; 471 *cmd_ptr = cmd; 472 return 0; 473 } 474 } 475 spin_unlock(&cr->conn_recovery_cmd_lock); 476 } 477 spin_unlock(&sess->cr_a_lock); 478 479 return -1; 480} 481 482void iscsit_add_cmd_to_immediate_queue( 483 struct iscsi_cmd *cmd, 484 struct iscsi_conn *conn, 485 u8 state) 486{ 487 struct iscsi_queue_req *qr; 488 489 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 490 if (!qr) { 491 pr_err("Unable to allocate memory for" 492 " struct iscsi_queue_req\n"); 493 return; 494 } 495 INIT_LIST_HEAD(&qr->qr_list); 496 qr->cmd = cmd; 497 qr->state = state; 498 499 spin_lock_bh(&conn->immed_queue_lock); 500 list_add_tail(&qr->qr_list, &conn->immed_queue_list); 501 atomic_inc(&cmd->immed_queue_count); 502 atomic_set(&conn->check_immediate_queue, 1); 503 spin_unlock_bh(&conn->immed_queue_lock); 504 505 wake_up(&conn->queues_wq); 506} 507 508struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 509{ 510 struct iscsi_queue_req *qr; 511 512 spin_lock_bh(&conn->immed_queue_lock); 513 if (list_empty(&conn->immed_queue_list)) { 514 spin_unlock_bh(&conn->immed_queue_lock); 515 return NULL; 516 } 517 qr = list_first_entry(&conn->immed_queue_list, 518 struct iscsi_queue_req, qr_list); 519 520 list_del(&qr->qr_list); 521 if (qr->cmd) 522 atomic_dec(&qr->cmd->immed_queue_count); 523 spin_unlock_bh(&conn->immed_queue_lock); 524 525 return qr; 526} 527 528static void iscsit_remove_cmd_from_immediate_queue( 529 struct iscsi_cmd *cmd, 530 struct iscsi_conn *conn) 531{ 532 struct iscsi_queue_req *qr, *qr_tmp; 533 534 spin_lock_bh(&conn->immed_queue_lock); 535 if (!atomic_read(&cmd->immed_queue_count)) { 536 spin_unlock_bh(&conn->immed_queue_lock); 537 return; 538 } 539 540 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 541 if (qr->cmd != cmd) 542 continue; 543 544 atomic_dec(&qr->cmd->immed_queue_count); 545 list_del(&qr->qr_list); 546 kmem_cache_free(lio_qr_cache, qr); 547 } 548 spin_unlock_bh(&conn->immed_queue_lock); 549 550 if (atomic_read(&cmd->immed_queue_count)) { 551 pr_err("ITT: 0x%08x immed_queue_count: %d\n", 552 cmd->init_task_tag, 553 atomic_read(&cmd->immed_queue_count)); 554 } 555} 556 557void iscsit_add_cmd_to_response_queue( 558 struct iscsi_cmd *cmd, 559 struct iscsi_conn *conn, 560 u8 state) 561{ 562 struct iscsi_queue_req *qr; 563 564 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 565 if (!qr) { 566 pr_err("Unable to allocate memory for" 567 " struct iscsi_queue_req\n"); 568 return; 569 } 570 INIT_LIST_HEAD(&qr->qr_list); 571 qr->cmd = cmd; 572 qr->state = state; 573 574 spin_lock_bh(&conn->response_queue_lock); 575 list_add_tail(&qr->qr_list, &conn->response_queue_list); 576 atomic_inc(&cmd->response_queue_count); 577 spin_unlock_bh(&conn->response_queue_lock); 578 579 wake_up(&conn->queues_wq); 580} 581 582struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 583{ 584 struct iscsi_queue_req *qr; 585 586 spin_lock_bh(&conn->response_queue_lock); 587 if (list_empty(&conn->response_queue_list)) { 588 spin_unlock_bh(&conn->response_queue_lock); 589 return NULL; 590 } 591 592 qr = list_first_entry(&conn->response_queue_list, 593 struct iscsi_queue_req, qr_list); 594 595 list_del(&qr->qr_list); 596 if (qr->cmd) 597 atomic_dec(&qr->cmd->response_queue_count); 598 spin_unlock_bh(&conn->response_queue_lock); 599 600 return qr; 601} 602 603static void iscsit_remove_cmd_from_response_queue( 604 struct iscsi_cmd *cmd, 605 struct iscsi_conn *conn) 606{ 607 struct iscsi_queue_req *qr, *qr_tmp; 608 609 spin_lock_bh(&conn->response_queue_lock); 610 if (!atomic_read(&cmd->response_queue_count)) { 611 spin_unlock_bh(&conn->response_queue_lock); 612 return; 613 } 614 615 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 616 qr_list) { 617 if (qr->cmd != cmd) 618 continue; 619 620 atomic_dec(&qr->cmd->response_queue_count); 621 list_del(&qr->qr_list); 622 kmem_cache_free(lio_qr_cache, qr); 623 } 624 spin_unlock_bh(&conn->response_queue_lock); 625 626 if (atomic_read(&cmd->response_queue_count)) { 627 pr_err("ITT: 0x%08x response_queue_count: %d\n", 628 cmd->init_task_tag, 629 atomic_read(&cmd->response_queue_count)); 630 } 631} 632 633bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 634{ 635 bool empty; 636 637 spin_lock_bh(&conn->immed_queue_lock); 638 empty = list_empty(&conn->immed_queue_list); 639 spin_unlock_bh(&conn->immed_queue_lock); 640 641 if (!empty) 642 return empty; 643 644 spin_lock_bh(&conn->response_queue_lock); 645 empty = list_empty(&conn->response_queue_list); 646 spin_unlock_bh(&conn->response_queue_lock); 647 648 return empty; 649} 650 651void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 652{ 653 struct iscsi_queue_req *qr, *qr_tmp; 654 655 spin_lock_bh(&conn->immed_queue_lock); 656 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 657 list_del(&qr->qr_list); 658 if (qr->cmd) 659 atomic_dec(&qr->cmd->immed_queue_count); 660 661 kmem_cache_free(lio_qr_cache, qr); 662 } 663 spin_unlock_bh(&conn->immed_queue_lock); 664 665 spin_lock_bh(&conn->response_queue_lock); 666 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 667 qr_list) { 668 list_del(&qr->qr_list); 669 if (qr->cmd) 670 atomic_dec(&qr->cmd->response_queue_count); 671 672 kmem_cache_free(lio_qr_cache, qr); 673 } 674 spin_unlock_bh(&conn->response_queue_lock); 675} 676 677void iscsit_release_cmd(struct iscsi_cmd *cmd) 678{ 679 kfree(cmd->buf_ptr); 680 kfree(cmd->pdu_list); 681 kfree(cmd->seq_list); 682 kfree(cmd->tmr_req); 683 kfree(cmd->iov_data); 684 kfree(cmd->text_in_ptr); 685 686 kmem_cache_free(lio_cmd_cache, cmd); 687} 688 689static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 690 bool check_queues) 691{ 692 struct iscsi_conn *conn = cmd->conn; 693 694 if (scsi_cmd) { 695 if (cmd->data_direction == DMA_TO_DEVICE) { 696 iscsit_stop_dataout_timer(cmd); 697 iscsit_free_r2ts_from_list(cmd); 698 } 699 if (cmd->data_direction == DMA_FROM_DEVICE) 700 iscsit_free_all_datain_reqs(cmd); 701 } 702 703 if (conn && check_queues) { 704 iscsit_remove_cmd_from_immediate_queue(cmd, conn); 705 iscsit_remove_cmd_from_response_queue(cmd, conn); 706 } 707} 708 709void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 710{ 711 struct se_cmd *se_cmd = NULL; 712 int rc; 713 /* 714 * Determine if a struct se_cmd is associated with 715 * this struct iscsi_cmd. 716 */ 717 switch (cmd->iscsi_opcode) { 718 case ISCSI_OP_SCSI_CMD: 719 se_cmd = &cmd->se_cmd; 720 __iscsit_free_cmd(cmd, true, shutdown); 721 /* 722 * Fallthrough 723 */ 724 case ISCSI_OP_SCSI_TMFUNC: 725 rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 726 if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 727 __iscsit_free_cmd(cmd, true, shutdown); 728 target_put_sess_cmd(se_cmd->se_sess, se_cmd); 729 } 730 break; 731 case ISCSI_OP_REJECT: 732 /* 733 * Handle special case for REJECT when iscsi_add_reject*() has 734 * overwritten the original iscsi_opcode assignment, and the 735 * associated cmd->se_cmd needs to be released. 736 */ 737 if (cmd->se_cmd.se_tfo != NULL) { 738 se_cmd = &cmd->se_cmd; 739 __iscsit_free_cmd(cmd, true, shutdown); 740 741 rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 742 if (!rc && shutdown && se_cmd->se_sess) { 743 __iscsit_free_cmd(cmd, true, shutdown); 744 target_put_sess_cmd(se_cmd->se_sess, se_cmd); 745 } 746 break; 747 } 748 /* Fall-through */ 749 default: 750 __iscsit_free_cmd(cmd, false, shutdown); 751 cmd->release_cmd(cmd); 752 break; 753 } 754} 755 756int iscsit_check_session_usage_count(struct iscsi_session *sess) 757{ 758 spin_lock_bh(&sess->session_usage_lock); 759 if (sess->session_usage_count != 0) { 760 sess->session_waiting_on_uc = 1; 761 spin_unlock_bh(&sess->session_usage_lock); 762 if (in_interrupt()) 763 return 2; 764 765 wait_for_completion(&sess->session_waiting_on_uc_comp); 766 return 1; 767 } 768 spin_unlock_bh(&sess->session_usage_lock); 769 770 return 0; 771} 772 773void iscsit_dec_session_usage_count(struct iscsi_session *sess) 774{ 775 spin_lock_bh(&sess->session_usage_lock); 776 sess->session_usage_count--; 777 778 if (!sess->session_usage_count && sess->session_waiting_on_uc) 779 complete(&sess->session_waiting_on_uc_comp); 780 781 spin_unlock_bh(&sess->session_usage_lock); 782} 783 784void iscsit_inc_session_usage_count(struct iscsi_session *sess) 785{ 786 spin_lock_bh(&sess->session_usage_lock); 787 sess->session_usage_count++; 788 spin_unlock_bh(&sess->session_usage_lock); 789} 790 791/* 792 * Setup conn->if_marker and conn->of_marker values based upon 793 * the initial marker-less interval. (see iSCSI v19 A.2) 794 */ 795int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 796{ 797 int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 798 /* 799 * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 800 */ 801 u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 802 u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 803 804 if (conn->conn_ops->OFMarker) { 805 /* 806 * Account for the first Login Command received not 807 * via iscsi_recv_msg(). 808 */ 809 conn->of_marker += ISCSI_HDR_LEN; 810 if (conn->of_marker <= OFMarkInt) { 811 conn->of_marker = (OFMarkInt - conn->of_marker); 812 } else { 813 login_ofmarker_count = (conn->of_marker / OFMarkInt); 814 next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 815 (login_ofmarker_count * MARKER_SIZE); 816 conn->of_marker = (next_marker - conn->of_marker); 817 } 818 conn->of_marker_offset = 0; 819 pr_debug("Setting OFMarker value to %u based on Initial" 820 " Markerless Interval.\n", conn->of_marker); 821 } 822 823 if (conn->conn_ops->IFMarker) { 824 if (conn->if_marker <= IFMarkInt) { 825 conn->if_marker = (IFMarkInt - conn->if_marker); 826 } else { 827 login_ifmarker_count = (conn->if_marker / IFMarkInt); 828 next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 829 (login_ifmarker_count * MARKER_SIZE); 830 conn->if_marker = (next_marker - conn->if_marker); 831 } 832 pr_debug("Setting IFMarker value to %u based on Initial" 833 " Markerless Interval.\n", conn->if_marker); 834 } 835 836 return 0; 837} 838 839struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 840{ 841 struct iscsi_conn *conn; 842 843 spin_lock_bh(&sess->conn_lock); 844 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 845 if ((conn->cid == cid) && 846 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 847 iscsit_inc_conn_usage_count(conn); 848 spin_unlock_bh(&sess->conn_lock); 849 return conn; 850 } 851 } 852 spin_unlock_bh(&sess->conn_lock); 853 854 return NULL; 855} 856 857struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 858{ 859 struct iscsi_conn *conn; 860 861 spin_lock_bh(&sess->conn_lock); 862 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 863 if (conn->cid == cid) { 864 iscsit_inc_conn_usage_count(conn); 865 spin_lock(&conn->state_lock); 866 atomic_set(&conn->connection_wait_rcfr, 1); 867 spin_unlock(&conn->state_lock); 868 spin_unlock_bh(&sess->conn_lock); 869 return conn; 870 } 871 } 872 spin_unlock_bh(&sess->conn_lock); 873 874 return NULL; 875} 876 877void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 878{ 879 spin_lock_bh(&conn->conn_usage_lock); 880 if (conn->conn_usage_count != 0) { 881 conn->conn_waiting_on_uc = 1; 882 spin_unlock_bh(&conn->conn_usage_lock); 883 884 wait_for_completion(&conn->conn_waiting_on_uc_comp); 885 return; 886 } 887 spin_unlock_bh(&conn->conn_usage_lock); 888} 889 890void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 891{ 892 spin_lock_bh(&conn->conn_usage_lock); 893 conn->conn_usage_count--; 894 895 if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 896 complete(&conn->conn_waiting_on_uc_comp); 897 898 spin_unlock_bh(&conn->conn_usage_lock); 899} 900 901void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 902{ 903 spin_lock_bh(&conn->conn_usage_lock); 904 conn->conn_usage_count++; 905 spin_unlock_bh(&conn->conn_usage_lock); 906} 907 908static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 909{ 910 u8 state; 911 struct iscsi_cmd *cmd; 912 913 cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 914 if (!cmd) 915 return -1; 916 917 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 918 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 919 ISTATE_SEND_NOPIN_NO_RESPONSE; 920 cmd->init_task_tag = RESERVED_ITT; 921 spin_lock_bh(&conn->sess->ttt_lock); 922 cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 923 0xFFFFFFFF; 924 if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 925 cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 926 spin_unlock_bh(&conn->sess->ttt_lock); 927 928 spin_lock_bh(&conn->cmd_lock); 929 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 930 spin_unlock_bh(&conn->cmd_lock); 931 932 if (want_response) 933 iscsit_start_nopin_response_timer(conn); 934 iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 935 936 return 0; 937} 938 939static void iscsit_handle_nopin_response_timeout(unsigned long data) 940{ 941 struct iscsi_conn *conn = (struct iscsi_conn *) data; 942 943 iscsit_inc_conn_usage_count(conn); 944 945 spin_lock_bh(&conn->nopin_timer_lock); 946 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 947 spin_unlock_bh(&conn->nopin_timer_lock); 948 iscsit_dec_conn_usage_count(conn); 949 return; 950 } 951 952 pr_debug("Did not receive response to NOPIN on CID: %hu on" 953 " SID: %u, failing connection.\n", conn->cid, 954 conn->sess->sid); 955 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 956 spin_unlock_bh(&conn->nopin_timer_lock); 957 958 { 959 struct iscsi_portal_group *tpg = conn->sess->tpg; 960 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 961 962 if (tiqn) { 963 spin_lock_bh(&tiqn->sess_err_stats.lock); 964 strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 965 conn->sess->sess_ops->InitiatorName); 966 tiqn->sess_err_stats.last_sess_failure_type = 967 ISCSI_SESS_ERR_CXN_TIMEOUT; 968 tiqn->sess_err_stats.cxn_timeout_errors++; 969 conn->sess->conn_timeout_errors++; 970 spin_unlock_bh(&tiqn->sess_err_stats.lock); 971 } 972 } 973 974 iscsit_cause_connection_reinstatement(conn, 0); 975 iscsit_dec_conn_usage_count(conn); 976} 977 978void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 979{ 980 struct iscsi_session *sess = conn->sess; 981 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 982 983 spin_lock_bh(&conn->nopin_timer_lock); 984 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 985 spin_unlock_bh(&conn->nopin_timer_lock); 986 return; 987 } 988 989 mod_timer(&conn->nopin_response_timer, 990 (get_jiffies_64() + na->nopin_response_timeout * HZ)); 991 spin_unlock_bh(&conn->nopin_timer_lock); 992} 993 994/* 995 * Called with conn->nopin_timer_lock held. 996 */ 997void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 998{ 999 struct iscsi_session *sess = conn->sess; 1000 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1001 1002 spin_lock_bh(&conn->nopin_timer_lock); 1003 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1004 spin_unlock_bh(&conn->nopin_timer_lock); 1005 return; 1006 } 1007 1008 init_timer(&conn->nopin_response_timer); 1009 conn->nopin_response_timer.expires = 1010 (get_jiffies_64() + na->nopin_response_timeout * HZ); 1011 conn->nopin_response_timer.data = (unsigned long)conn; 1012 conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1013 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1014 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1015 add_timer(&conn->nopin_response_timer); 1016 1017 pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1018 " seconds\n", conn->cid, na->nopin_response_timeout); 1019 spin_unlock_bh(&conn->nopin_timer_lock); 1020} 1021 1022void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1023{ 1024 spin_lock_bh(&conn->nopin_timer_lock); 1025 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1026 spin_unlock_bh(&conn->nopin_timer_lock); 1027 return; 1028 } 1029 conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1030 spin_unlock_bh(&conn->nopin_timer_lock); 1031 1032 del_timer_sync(&conn->nopin_response_timer); 1033 1034 spin_lock_bh(&conn->nopin_timer_lock); 1035 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1036 spin_unlock_bh(&conn->nopin_timer_lock); 1037} 1038 1039static void iscsit_handle_nopin_timeout(unsigned long data) 1040{ 1041 struct iscsi_conn *conn = (struct iscsi_conn *) data; 1042 1043 iscsit_inc_conn_usage_count(conn); 1044 1045 spin_lock_bh(&conn->nopin_timer_lock); 1046 if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1047 spin_unlock_bh(&conn->nopin_timer_lock); 1048 iscsit_dec_conn_usage_count(conn); 1049 return; 1050 } 1051 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1052 spin_unlock_bh(&conn->nopin_timer_lock); 1053 1054 iscsit_add_nopin(conn, 1); 1055 iscsit_dec_conn_usage_count(conn); 1056} 1057 1058/* 1059 * Called with conn->nopin_timer_lock held. 1060 */ 1061void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1062{ 1063 struct iscsi_session *sess = conn->sess; 1064 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1065 /* 1066 * NOPIN timeout is disabled. 1067 */ 1068 if (!na->nopin_timeout) 1069 return; 1070 1071 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1072 return; 1073 1074 init_timer(&conn->nopin_timer); 1075 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1076 conn->nopin_timer.data = (unsigned long)conn; 1077 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1078 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1079 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1080 add_timer(&conn->nopin_timer); 1081 1082 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1083 " interval\n", conn->cid, na->nopin_timeout); 1084} 1085 1086void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1087{ 1088 struct iscsi_session *sess = conn->sess; 1089 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1090 /* 1091 * NOPIN timeout is disabled.. 1092 */ 1093 if (!na->nopin_timeout) 1094 return; 1095 1096 spin_lock_bh(&conn->nopin_timer_lock); 1097 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1098 spin_unlock_bh(&conn->nopin_timer_lock); 1099 return; 1100 } 1101 1102 init_timer(&conn->nopin_timer); 1103 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1104 conn->nopin_timer.data = (unsigned long)conn; 1105 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1106 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1107 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1108 add_timer(&conn->nopin_timer); 1109 1110 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1111 " interval\n", conn->cid, na->nopin_timeout); 1112 spin_unlock_bh(&conn->nopin_timer_lock); 1113} 1114 1115void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1116{ 1117 spin_lock_bh(&conn->nopin_timer_lock); 1118 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1119 spin_unlock_bh(&conn->nopin_timer_lock); 1120 return; 1121 } 1122 conn->nopin_timer_flags |= ISCSI_TF_STOP; 1123 spin_unlock_bh(&conn->nopin_timer_lock); 1124 1125 del_timer_sync(&conn->nopin_timer); 1126 1127 spin_lock_bh(&conn->nopin_timer_lock); 1128 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1129 spin_unlock_bh(&conn->nopin_timer_lock); 1130} 1131 1132int iscsit_send_tx_data( 1133 struct iscsi_cmd *cmd, 1134 struct iscsi_conn *conn, 1135 int use_misc) 1136{ 1137 int tx_sent, tx_size; 1138 u32 iov_count; 1139 struct kvec *iov; 1140 1141send_data: 1142 tx_size = cmd->tx_size; 1143 1144 if (!use_misc) { 1145 iov = &cmd->iov_data[0]; 1146 iov_count = cmd->iov_data_count; 1147 } else { 1148 iov = &cmd->iov_misc[0]; 1149 iov_count = cmd->iov_misc_count; 1150 } 1151 1152 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1153 if (tx_size != tx_sent) { 1154 if (tx_sent == -EAGAIN) { 1155 pr_err("tx_data() returned -EAGAIN\n"); 1156 goto send_data; 1157 } else 1158 return -1; 1159 } 1160 cmd->tx_size = 0; 1161 1162 return 0; 1163} 1164 1165int iscsit_fe_sendpage_sg( 1166 struct iscsi_cmd *cmd, 1167 struct iscsi_conn *conn) 1168{ 1169 struct scatterlist *sg = cmd->first_data_sg; 1170 struct kvec iov; 1171 u32 tx_hdr_size, data_len; 1172 u32 offset = cmd->first_data_sg_off; 1173 int tx_sent, iov_off; 1174 1175send_hdr: 1176 tx_hdr_size = ISCSI_HDR_LEN; 1177 if (conn->conn_ops->HeaderDigest) 1178 tx_hdr_size += ISCSI_CRC_LEN; 1179 1180 iov.iov_base = cmd->pdu; 1181 iov.iov_len = tx_hdr_size; 1182 1183 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1184 if (tx_hdr_size != tx_sent) { 1185 if (tx_sent == -EAGAIN) { 1186 pr_err("tx_data() returned -EAGAIN\n"); 1187 goto send_hdr; 1188 } 1189 return -1; 1190 } 1191 1192 data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 1193 /* 1194 * Set iov_off used by padding and data digest tx_data() calls below 1195 * in order to determine proper offset into cmd->iov_data[] 1196 */ 1197 if (conn->conn_ops->DataDigest) { 1198 data_len -= ISCSI_CRC_LEN; 1199 if (cmd->padding) 1200 iov_off = (cmd->iov_data_count - 2); 1201 else 1202 iov_off = (cmd->iov_data_count - 1); 1203 } else { 1204 iov_off = (cmd->iov_data_count - 1); 1205 } 1206 /* 1207 * Perform sendpage() for each page in the scatterlist 1208 */ 1209 while (data_len) { 1210 u32 space = (sg->length - offset); 1211 u32 sub_len = min_t(u32, data_len, space); 1212send_pg: 1213 tx_sent = conn->sock->ops->sendpage(conn->sock, 1214 sg_page(sg), sg->offset + offset, sub_len, 0); 1215 if (tx_sent != sub_len) { 1216 if (tx_sent == -EAGAIN) { 1217 pr_err("tcp_sendpage() returned" 1218 " -EAGAIN\n"); 1219 goto send_pg; 1220 } 1221 1222 pr_err("tcp_sendpage() failure: %d\n", 1223 tx_sent); 1224 return -1; 1225 } 1226 1227 data_len -= sub_len; 1228 offset = 0; 1229 sg = sg_next(sg); 1230 } 1231 1232send_padding: 1233 if (cmd->padding) { 1234 struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1235 1236 tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1237 if (cmd->padding != tx_sent) { 1238 if (tx_sent == -EAGAIN) { 1239 pr_err("tx_data() returned -EAGAIN\n"); 1240 goto send_padding; 1241 } 1242 return -1; 1243 } 1244 } 1245 1246send_datacrc: 1247 if (conn->conn_ops->DataDigest) { 1248 struct kvec *iov_d = &cmd->iov_data[iov_off]; 1249 1250 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1251 if (ISCSI_CRC_LEN != tx_sent) { 1252 if (tx_sent == -EAGAIN) { 1253 pr_err("tx_data() returned -EAGAIN\n"); 1254 goto send_datacrc; 1255 } 1256 return -1; 1257 } 1258 } 1259 1260 return 0; 1261} 1262 1263/* 1264 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1265 * back to the Initiator when an expection condition occurs with the 1266 * errors set in status_class and status_detail. 1267 * 1268 * Parameters: iSCSI Connection, Status Class, Status Detail. 1269 * Returns: 0 on success, -1 on error. 1270 */ 1271int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1272{ 1273 struct iscsi_login_rsp *hdr; 1274 struct iscsi_login *login = conn->conn_login; 1275 1276 login->login_failed = 1; 1277 iscsit_collect_login_stats(conn, status_class, status_detail); 1278 1279 hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1280 hdr->opcode = ISCSI_OP_LOGIN_RSP; 1281 hdr->status_class = status_class; 1282 hdr->status_detail = status_detail; 1283 hdr->itt = conn->login_itt; 1284 1285 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1286} 1287 1288void iscsit_print_session_params(struct iscsi_session *sess) 1289{ 1290 struct iscsi_conn *conn; 1291 1292 pr_debug("-----------------------------[Session Params for" 1293 " SID: %u]-----------------------------\n", sess->sid); 1294 spin_lock_bh(&sess->conn_lock); 1295 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1296 iscsi_dump_conn_ops(conn->conn_ops); 1297 spin_unlock_bh(&sess->conn_lock); 1298 1299 iscsi_dump_sess_ops(sess->sess_ops); 1300} 1301 1302static int iscsit_do_rx_data( 1303 struct iscsi_conn *conn, 1304 struct iscsi_data_count *count) 1305{ 1306 int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 1307 struct kvec *iov_p; 1308 struct msghdr msg; 1309 1310 if (!conn || !conn->sock || !conn->conn_ops) 1311 return -1; 1312 1313 memset(&msg, 0, sizeof(struct msghdr)); 1314 1315 iov_p = count->iov; 1316 iov_len = count->iov_count; 1317 1318 while (total_rx < data) { 1319 rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1320 (data - total_rx), MSG_WAITALL); 1321 if (rx_loop <= 0) { 1322 pr_debug("rx_loop: %d total_rx: %d\n", 1323 rx_loop, total_rx); 1324 return rx_loop; 1325 } 1326 total_rx += rx_loop; 1327 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1328 rx_loop, total_rx, data); 1329 } 1330 1331 return total_rx; 1332} 1333 1334static int iscsit_do_tx_data( 1335 struct iscsi_conn *conn, 1336 struct iscsi_data_count *count) 1337{ 1338 int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 1339 struct kvec *iov_p; 1340 struct msghdr msg; 1341 1342 if (!conn || !conn->sock || !conn->conn_ops) 1343 return -1; 1344 1345 if (data <= 0) { 1346 pr_err("Data length is: %d\n", data); 1347 return -1; 1348 } 1349 1350 memset(&msg, 0, sizeof(struct msghdr)); 1351 1352 iov_p = count->iov; 1353 iov_len = count->iov_count; 1354 1355 while (total_tx < data) { 1356 tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1357 (data - total_tx)); 1358 if (tx_loop <= 0) { 1359 pr_debug("tx_loop: %d total_tx %d\n", 1360 tx_loop, total_tx); 1361 return tx_loop; 1362 } 1363 total_tx += tx_loop; 1364 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1365 tx_loop, total_tx, data); 1366 } 1367 1368 return total_tx; 1369} 1370 1371int rx_data( 1372 struct iscsi_conn *conn, 1373 struct kvec *iov, 1374 int iov_count, 1375 int data) 1376{ 1377 struct iscsi_data_count c; 1378 1379 if (!conn || !conn->sock || !conn->conn_ops) 1380 return -1; 1381 1382 memset(&c, 0, sizeof(struct iscsi_data_count)); 1383 c.iov = iov; 1384 c.iov_count = iov_count; 1385 c.data_length = data; 1386 c.type = ISCSI_RX_DATA; 1387 1388 return iscsit_do_rx_data(conn, &c); 1389} 1390 1391int tx_data( 1392 struct iscsi_conn *conn, 1393 struct kvec *iov, 1394 int iov_count, 1395 int data) 1396{ 1397 struct iscsi_data_count c; 1398 1399 if (!conn || !conn->sock || !conn->conn_ops) 1400 return -1; 1401 1402 memset(&c, 0, sizeof(struct iscsi_data_count)); 1403 c.iov = iov; 1404 c.iov_count = iov_count; 1405 c.data_length = data; 1406 c.type = ISCSI_TX_DATA; 1407 1408 return iscsit_do_tx_data(conn, &c); 1409} 1410 1411void iscsit_collect_login_stats( 1412 struct iscsi_conn *conn, 1413 u8 status_class, 1414 u8 status_detail) 1415{ 1416 struct iscsi_param *intrname = NULL; 1417 struct iscsi_tiqn *tiqn; 1418 struct iscsi_login_stats *ls; 1419 1420 tiqn = iscsit_snmp_get_tiqn(conn); 1421 if (!tiqn) 1422 return; 1423 1424 ls = &tiqn->login_stats; 1425 1426 spin_lock(&ls->lock); 1427 if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1428 ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1429 /* We already have the failure info for this login */ 1430 spin_unlock(&ls->lock); 1431 return; 1432 } 1433 1434 if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1435 ls->accepts++; 1436 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1437 ls->redirects++; 1438 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1439 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1440 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1441 ls->authenticate_fails++; 1442 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1443 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1444 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1445 ls->authorize_fails++; 1446 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1447 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1448 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1449 ls->negotiate_fails++; 1450 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1451 } else { 1452 ls->other_fails++; 1453 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1454 } 1455 1456 /* Save initiator name, ip address and time, if it is a failed login */ 1457 if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1458 if (conn->param_list) 1459 intrname = iscsi_find_param_from_key(INITIATORNAME, 1460 conn->param_list); 1461 strcpy(ls->last_intr_fail_name, 1462 (intrname ? intrname->value : "Unknown")); 1463 1464 ls->last_intr_fail_ip_family = conn->login_family; 1465 1466 snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1467 "%s", conn->login_ip); 1468 ls->last_fail_time = get_jiffies_64(); 1469 } 1470 1471 spin_unlock(&ls->lock); 1472} 1473 1474struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1475{ 1476 struct iscsi_portal_group *tpg; 1477 1478 if (!conn || !conn->sess) 1479 return NULL; 1480 1481 tpg = conn->sess->tpg; 1482 if (!tpg) 1483 return NULL; 1484 1485 if (!tpg->tpg_tiqn) 1486 return NULL; 1487 1488 return tpg->tpg_tiqn; 1489} 1490