1 /******************************************************************************* 2 * This file contains the iSCSI Target specific utility functions. 3 * 4 * (c) Copyright 2007-2013 Datera, Inc. 5 * 6 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 ******************************************************************************/ 18 19 #include <linux/list.h> 20 #include <linux/percpu_ida.h> 21 #include <net/ipv6.h> /* ipv6_addr_equal() */ 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/iscsi/iscsi_transport.h> 27 28 #include <target/iscsi/iscsi_target_core.h> 29 #include "iscsi_target_parameters.h" 30 #include "iscsi_target_seq_pdu_list.h" 31 #include "iscsi_target_datain_values.h" 32 #include "iscsi_target_erl0.h" 33 #include "iscsi_target_erl1.h" 34 #include "iscsi_target_erl2.h" 35 #include "iscsi_target_tpg.h" 36 #include "iscsi_target_util.h" 37 #include "iscsi_target.h" 38 39 #define PRINT_BUFF(buff, len) \ 40 { \ 41 int zzz; \ 42 \ 43 pr_debug("%d:\n", __LINE__); \ 44 for (zzz = 0; zzz < len; zzz++) { \ 45 if (zzz % 16 == 0) { \ 46 if (zzz) \ 47 pr_debug("\n"); \ 48 pr_debug("%4i: ", zzz); \ 49 } \ 50 pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 51 } \ 52 if ((len + 1) % 16) \ 53 pr_debug("\n"); \ 54 } 55 56 extern struct list_head g_tiqn_list; 57 extern spinlock_t tiqn_lock; 58 59 /* 60 * Called with cmd->r2t_lock held. 61 */ 62 int iscsit_add_r2t_to_list( 63 struct iscsi_cmd *cmd, 64 u32 offset, 65 u32 xfer_len, 66 int recovery, 67 u32 r2t_sn) 68 { 69 struct iscsi_r2t *r2t; 70 71 r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 72 if (!r2t) { 73 pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 74 return -1; 75 } 76 INIT_LIST_HEAD(&r2t->r2t_list); 77 78 r2t->recovery_r2t = recovery; 79 r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 80 r2t->offset = offset; 81 r2t->xfer_len = xfer_len; 82 list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 83 spin_unlock_bh(&cmd->r2t_lock); 84 85 iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 86 87 spin_lock_bh(&cmd->r2t_lock); 88 return 0; 89 } 90 91 struct iscsi_r2t *iscsit_get_r2t_for_eos( 92 struct iscsi_cmd *cmd, 93 u32 offset, 94 u32 length) 95 { 96 struct iscsi_r2t *r2t; 97 98 spin_lock_bh(&cmd->r2t_lock); 99 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 100 if ((r2t->offset <= offset) && 101 (r2t->offset + r2t->xfer_len) >= (offset + length)) { 102 spin_unlock_bh(&cmd->r2t_lock); 103 return r2t; 104 } 105 } 106 spin_unlock_bh(&cmd->r2t_lock); 107 108 pr_err("Unable to locate R2T for Offset: %u, Length:" 109 " %u\n", offset, length); 110 return NULL; 111 } 112 113 struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 114 { 115 struct iscsi_r2t *r2t; 116 117 spin_lock_bh(&cmd->r2t_lock); 118 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 119 if (!r2t->sent_r2t) { 120 spin_unlock_bh(&cmd->r2t_lock); 121 return r2t; 122 } 123 } 124 spin_unlock_bh(&cmd->r2t_lock); 125 126 pr_err("Unable to locate next R2T to send for ITT:" 127 " 0x%08x.\n", cmd->init_task_tag); 128 return NULL; 129 } 130 131 /* 132 * Called with cmd->r2t_lock held. 133 */ 134 void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 135 { 136 list_del(&r2t->r2t_list); 137 kmem_cache_free(lio_r2t_cache, r2t); 138 } 139 140 void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 141 { 142 struct iscsi_r2t *r2t, *r2t_tmp; 143 144 spin_lock_bh(&cmd->r2t_lock); 145 list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 146 iscsit_free_r2t(r2t, cmd); 147 spin_unlock_bh(&cmd->r2t_lock); 148 } 149 150 /* 151 * May be called from software interrupt (timer) context for allocating 152 * iSCSI NopINs. 153 */ 154 struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 155 { 156 struct iscsi_cmd *cmd; 157 struct se_session *se_sess = conn->sess->se_sess; 158 int size, tag; 159 160 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); 161 if (tag < 0) 162 return NULL; 163 164 size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 165 cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 166 memset(cmd, 0, size); 167 168 cmd->se_cmd.map_tag = tag; 169 cmd->conn = conn; 170 INIT_LIST_HEAD(&cmd->i_conn_node); 171 INIT_LIST_HEAD(&cmd->datain_list); 172 INIT_LIST_HEAD(&cmd->cmd_r2t_list); 173 spin_lock_init(&cmd->datain_lock); 174 spin_lock_init(&cmd->dataout_timeout_lock); 175 spin_lock_init(&cmd->istate_lock); 176 spin_lock_init(&cmd->error_lock); 177 spin_lock_init(&cmd->r2t_lock); 178 179 return cmd; 180 } 181 EXPORT_SYMBOL(iscsit_allocate_cmd); 182 183 struct iscsi_seq *iscsit_get_seq_holder_for_datain( 184 struct iscsi_cmd *cmd, 185 u32 seq_send_order) 186 { 187 u32 i; 188 189 for (i = 0; i < cmd->seq_count; i++) 190 if (cmd->seq_list[i].seq_send_order == seq_send_order) 191 return &cmd->seq_list[i]; 192 193 return NULL; 194 } 195 196 struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 197 { 198 u32 i; 199 200 if (!cmd->seq_list) { 201 pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 202 return NULL; 203 } 204 205 for (i = 0; i < cmd->seq_count; i++) { 206 if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 207 continue; 208 if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 209 cmd->seq_send_order++; 210 return &cmd->seq_list[i]; 211 } 212 } 213 214 return NULL; 215 } 216 217 struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 218 struct iscsi_cmd *cmd, 219 u32 r2t_sn) 220 { 221 struct iscsi_r2t *r2t; 222 223 spin_lock_bh(&cmd->r2t_lock); 224 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 225 if (r2t->r2t_sn == r2t_sn) { 226 spin_unlock_bh(&cmd->r2t_lock); 227 return r2t; 228 } 229 } 230 spin_unlock_bh(&cmd->r2t_lock); 231 232 return NULL; 233 } 234 235 static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 236 { 237 u32 max_cmdsn; 238 int ret; 239 240 /* 241 * This is the proper method of checking received CmdSN against 242 * ExpCmdSN and MaxCmdSN values, as well as accounting for out 243 * or order CmdSNs due to multiple connection sessions and/or 244 * CRC failures. 245 */ 246 max_cmdsn = atomic_read(&sess->max_cmd_sn); 247 if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 248 pr_err("Received CmdSN: 0x%08x is greater than" 249 " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 250 ret = CMDSN_MAXCMDSN_OVERRUN; 251 252 } else if (cmdsn == sess->exp_cmd_sn) { 253 sess->exp_cmd_sn++; 254 pr_debug("Received CmdSN matches ExpCmdSN," 255 " incremented ExpCmdSN to: 0x%08x\n", 256 sess->exp_cmd_sn); 257 ret = CMDSN_NORMAL_OPERATION; 258 259 } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 260 pr_debug("Received CmdSN: 0x%08x is greater" 261 " than ExpCmdSN: 0x%08x, not acknowledging.\n", 262 cmdsn, sess->exp_cmd_sn); 263 ret = CMDSN_HIGHER_THAN_EXP; 264 265 } else { 266 pr_err("Received CmdSN: 0x%08x is less than" 267 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 268 sess->exp_cmd_sn); 269 ret = CMDSN_LOWER_THAN_EXP; 270 } 271 272 return ret; 273 } 274 275 /* 276 * Commands may be received out of order if MC/S is in use. 277 * Ensure they are executed in CmdSN order. 278 */ 279 int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 280 unsigned char *buf, __be32 cmdsn) 281 { 282 int ret, cmdsn_ret; 283 bool reject = false; 284 u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 285 286 mutex_lock(&conn->sess->cmdsn_mutex); 287 288 cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 289 switch (cmdsn_ret) { 290 case CMDSN_NORMAL_OPERATION: 291 ret = iscsit_execute_cmd(cmd, 0); 292 if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 293 iscsit_execute_ooo_cmdsns(conn->sess); 294 else if (ret < 0) { 295 reject = true; 296 ret = CMDSN_ERROR_CANNOT_RECOVER; 297 } 298 break; 299 case CMDSN_HIGHER_THAN_EXP: 300 ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 301 if (ret < 0) { 302 reject = true; 303 ret = CMDSN_ERROR_CANNOT_RECOVER; 304 break; 305 } 306 ret = CMDSN_HIGHER_THAN_EXP; 307 break; 308 case CMDSN_LOWER_THAN_EXP: 309 case CMDSN_MAXCMDSN_OVERRUN: 310 default: 311 cmd->i_state = ISTATE_REMOVE; 312 iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 313 /* 314 * Existing callers for iscsit_sequence_cmd() will silently 315 * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 316 * return for CMDSN_MAXCMDSN_OVERRUN as well.. 317 */ 318 ret = CMDSN_LOWER_THAN_EXP; 319 break; 320 } 321 mutex_unlock(&conn->sess->cmdsn_mutex); 322 323 if (reject) 324 iscsit_reject_cmd(cmd, reason, buf); 325 326 return ret; 327 } 328 EXPORT_SYMBOL(iscsit_sequence_cmd); 329 330 int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 331 { 332 struct iscsi_conn *conn = cmd->conn; 333 struct se_cmd *se_cmd = &cmd->se_cmd; 334 struct iscsi_data *hdr = (struct iscsi_data *) buf; 335 u32 payload_length = ntoh24(hdr->dlength); 336 337 if (conn->sess->sess_ops->InitialR2T) { 338 pr_err("Received unexpected unsolicited data" 339 " while InitialR2T=Yes, protocol error.\n"); 340 transport_send_check_condition_and_sense(se_cmd, 341 TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 342 return -1; 343 } 344 345 if ((cmd->first_burst_len + payload_length) > 346 conn->sess->sess_ops->FirstBurstLength) { 347 pr_err("Total %u bytes exceeds FirstBurstLength: %u" 348 " for this Unsolicited DataOut Burst.\n", 349 (cmd->first_burst_len + payload_length), 350 conn->sess->sess_ops->FirstBurstLength); 351 transport_send_check_condition_and_sense(se_cmd, 352 TCM_INCORRECT_AMOUNT_OF_DATA, 0); 353 return -1; 354 } 355 356 if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 357 return 0; 358 359 if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 360 ((cmd->first_burst_len + payload_length) != 361 conn->sess->sess_ops->FirstBurstLength)) { 362 pr_err("Unsolicited non-immediate data received %u" 363 " does not equal FirstBurstLength: %u, and does" 364 " not equal ExpXferLen %u.\n", 365 (cmd->first_burst_len + payload_length), 366 conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 367 transport_send_check_condition_and_sense(se_cmd, 368 TCM_INCORRECT_AMOUNT_OF_DATA, 0); 369 return -1; 370 } 371 return 0; 372 } 373 374 struct iscsi_cmd *iscsit_find_cmd_from_itt( 375 struct iscsi_conn *conn, 376 itt_t init_task_tag) 377 { 378 struct iscsi_cmd *cmd; 379 380 spin_lock_bh(&conn->cmd_lock); 381 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 382 if (cmd->init_task_tag == init_task_tag) { 383 spin_unlock_bh(&conn->cmd_lock); 384 return cmd; 385 } 386 } 387 spin_unlock_bh(&conn->cmd_lock); 388 389 pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 390 init_task_tag, conn->cid); 391 return NULL; 392 } 393 EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 394 395 struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 396 struct iscsi_conn *conn, 397 itt_t init_task_tag, 398 u32 length) 399 { 400 struct iscsi_cmd *cmd; 401 402 spin_lock_bh(&conn->cmd_lock); 403 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 404 if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 405 continue; 406 if (cmd->init_task_tag == init_task_tag) { 407 spin_unlock_bh(&conn->cmd_lock); 408 return cmd; 409 } 410 } 411 spin_unlock_bh(&conn->cmd_lock); 412 413 pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 414 " dumping payload\n", init_task_tag, conn->cid); 415 if (length) 416 iscsit_dump_data_payload(conn, length, 1); 417 418 return NULL; 419 } 420 EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 421 422 struct iscsi_cmd *iscsit_find_cmd_from_ttt( 423 struct iscsi_conn *conn, 424 u32 targ_xfer_tag) 425 { 426 struct iscsi_cmd *cmd = NULL; 427 428 spin_lock_bh(&conn->cmd_lock); 429 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 430 if (cmd->targ_xfer_tag == targ_xfer_tag) { 431 spin_unlock_bh(&conn->cmd_lock); 432 return cmd; 433 } 434 } 435 spin_unlock_bh(&conn->cmd_lock); 436 437 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 438 targ_xfer_tag, conn->cid); 439 return NULL; 440 } 441 442 int iscsit_find_cmd_for_recovery( 443 struct iscsi_session *sess, 444 struct iscsi_cmd **cmd_ptr, 445 struct iscsi_conn_recovery **cr_ptr, 446 itt_t init_task_tag) 447 { 448 struct iscsi_cmd *cmd = NULL; 449 struct iscsi_conn_recovery *cr; 450 /* 451 * Scan through the inactive connection recovery list's command list. 452 * If init_task_tag matches the command is still alligent. 453 */ 454 spin_lock(&sess->cr_i_lock); 455 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 456 spin_lock(&cr->conn_recovery_cmd_lock); 457 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 458 if (cmd->init_task_tag == init_task_tag) { 459 spin_unlock(&cr->conn_recovery_cmd_lock); 460 spin_unlock(&sess->cr_i_lock); 461 462 *cr_ptr = cr; 463 *cmd_ptr = cmd; 464 return -2; 465 } 466 } 467 spin_unlock(&cr->conn_recovery_cmd_lock); 468 } 469 spin_unlock(&sess->cr_i_lock); 470 /* 471 * Scan through the active connection recovery list's command list. 472 * If init_task_tag matches the command is ready to be reassigned. 473 */ 474 spin_lock(&sess->cr_a_lock); 475 list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 476 spin_lock(&cr->conn_recovery_cmd_lock); 477 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 478 if (cmd->init_task_tag == init_task_tag) { 479 spin_unlock(&cr->conn_recovery_cmd_lock); 480 spin_unlock(&sess->cr_a_lock); 481 482 *cr_ptr = cr; 483 *cmd_ptr = cmd; 484 return 0; 485 } 486 } 487 spin_unlock(&cr->conn_recovery_cmd_lock); 488 } 489 spin_unlock(&sess->cr_a_lock); 490 491 return -1; 492 } 493 494 void iscsit_add_cmd_to_immediate_queue( 495 struct iscsi_cmd *cmd, 496 struct iscsi_conn *conn, 497 u8 state) 498 { 499 struct iscsi_queue_req *qr; 500 501 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 502 if (!qr) { 503 pr_err("Unable to allocate memory for" 504 " struct iscsi_queue_req\n"); 505 return; 506 } 507 INIT_LIST_HEAD(&qr->qr_list); 508 qr->cmd = cmd; 509 qr->state = state; 510 511 spin_lock_bh(&conn->immed_queue_lock); 512 list_add_tail(&qr->qr_list, &conn->immed_queue_list); 513 atomic_inc(&cmd->immed_queue_count); 514 atomic_set(&conn->check_immediate_queue, 1); 515 spin_unlock_bh(&conn->immed_queue_lock); 516 517 wake_up(&conn->queues_wq); 518 } 519 EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 520 521 struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 522 { 523 struct iscsi_queue_req *qr; 524 525 spin_lock_bh(&conn->immed_queue_lock); 526 if (list_empty(&conn->immed_queue_list)) { 527 spin_unlock_bh(&conn->immed_queue_lock); 528 return NULL; 529 } 530 qr = list_first_entry(&conn->immed_queue_list, 531 struct iscsi_queue_req, qr_list); 532 533 list_del(&qr->qr_list); 534 if (qr->cmd) 535 atomic_dec(&qr->cmd->immed_queue_count); 536 spin_unlock_bh(&conn->immed_queue_lock); 537 538 return qr; 539 } 540 541 static void iscsit_remove_cmd_from_immediate_queue( 542 struct iscsi_cmd *cmd, 543 struct iscsi_conn *conn) 544 { 545 struct iscsi_queue_req *qr, *qr_tmp; 546 547 spin_lock_bh(&conn->immed_queue_lock); 548 if (!atomic_read(&cmd->immed_queue_count)) { 549 spin_unlock_bh(&conn->immed_queue_lock); 550 return; 551 } 552 553 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 554 if (qr->cmd != cmd) 555 continue; 556 557 atomic_dec(&qr->cmd->immed_queue_count); 558 list_del(&qr->qr_list); 559 kmem_cache_free(lio_qr_cache, qr); 560 } 561 spin_unlock_bh(&conn->immed_queue_lock); 562 563 if (atomic_read(&cmd->immed_queue_count)) { 564 pr_err("ITT: 0x%08x immed_queue_count: %d\n", 565 cmd->init_task_tag, 566 atomic_read(&cmd->immed_queue_count)); 567 } 568 } 569 570 int iscsit_add_cmd_to_response_queue( 571 struct iscsi_cmd *cmd, 572 struct iscsi_conn *conn, 573 u8 state) 574 { 575 struct iscsi_queue_req *qr; 576 577 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 578 if (!qr) { 579 pr_err("Unable to allocate memory for" 580 " struct iscsi_queue_req\n"); 581 return -ENOMEM; 582 } 583 INIT_LIST_HEAD(&qr->qr_list); 584 qr->cmd = cmd; 585 qr->state = state; 586 587 spin_lock_bh(&conn->response_queue_lock); 588 list_add_tail(&qr->qr_list, &conn->response_queue_list); 589 atomic_inc(&cmd->response_queue_count); 590 spin_unlock_bh(&conn->response_queue_lock); 591 592 wake_up(&conn->queues_wq); 593 return 0; 594 } 595 596 struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 597 { 598 struct iscsi_queue_req *qr; 599 600 spin_lock_bh(&conn->response_queue_lock); 601 if (list_empty(&conn->response_queue_list)) { 602 spin_unlock_bh(&conn->response_queue_lock); 603 return NULL; 604 } 605 606 qr = list_first_entry(&conn->response_queue_list, 607 struct iscsi_queue_req, qr_list); 608 609 list_del(&qr->qr_list); 610 if (qr->cmd) 611 atomic_dec(&qr->cmd->response_queue_count); 612 spin_unlock_bh(&conn->response_queue_lock); 613 614 return qr; 615 } 616 617 static void iscsit_remove_cmd_from_response_queue( 618 struct iscsi_cmd *cmd, 619 struct iscsi_conn *conn) 620 { 621 struct iscsi_queue_req *qr, *qr_tmp; 622 623 spin_lock_bh(&conn->response_queue_lock); 624 if (!atomic_read(&cmd->response_queue_count)) { 625 spin_unlock_bh(&conn->response_queue_lock); 626 return; 627 } 628 629 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 630 qr_list) { 631 if (qr->cmd != cmd) 632 continue; 633 634 atomic_dec(&qr->cmd->response_queue_count); 635 list_del(&qr->qr_list); 636 kmem_cache_free(lio_qr_cache, qr); 637 } 638 spin_unlock_bh(&conn->response_queue_lock); 639 640 if (atomic_read(&cmd->response_queue_count)) { 641 pr_err("ITT: 0x%08x response_queue_count: %d\n", 642 cmd->init_task_tag, 643 atomic_read(&cmd->response_queue_count)); 644 } 645 } 646 647 bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 648 { 649 bool empty; 650 651 spin_lock_bh(&conn->immed_queue_lock); 652 empty = list_empty(&conn->immed_queue_list); 653 spin_unlock_bh(&conn->immed_queue_lock); 654 655 if (!empty) 656 return empty; 657 658 spin_lock_bh(&conn->response_queue_lock); 659 empty = list_empty(&conn->response_queue_list); 660 spin_unlock_bh(&conn->response_queue_lock); 661 662 return empty; 663 } 664 665 void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 666 { 667 struct iscsi_queue_req *qr, *qr_tmp; 668 669 spin_lock_bh(&conn->immed_queue_lock); 670 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 671 list_del(&qr->qr_list); 672 if (qr->cmd) 673 atomic_dec(&qr->cmd->immed_queue_count); 674 675 kmem_cache_free(lio_qr_cache, qr); 676 } 677 spin_unlock_bh(&conn->immed_queue_lock); 678 679 spin_lock_bh(&conn->response_queue_lock); 680 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 681 qr_list) { 682 list_del(&qr->qr_list); 683 if (qr->cmd) 684 atomic_dec(&qr->cmd->response_queue_count); 685 686 kmem_cache_free(lio_qr_cache, qr); 687 } 688 spin_unlock_bh(&conn->response_queue_lock); 689 } 690 691 void iscsit_release_cmd(struct iscsi_cmd *cmd) 692 { 693 struct iscsi_session *sess; 694 struct se_cmd *se_cmd = &cmd->se_cmd; 695 696 if (cmd->conn) 697 sess = cmd->conn->sess; 698 else 699 sess = cmd->sess; 700 701 BUG_ON(!sess || !sess->se_sess); 702 703 kfree(cmd->buf_ptr); 704 kfree(cmd->pdu_list); 705 kfree(cmd->seq_list); 706 kfree(cmd->tmr_req); 707 kfree(cmd->iov_data); 708 kfree(cmd->text_in_ptr); 709 710 percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 711 } 712 EXPORT_SYMBOL(iscsit_release_cmd); 713 714 void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 715 bool check_queues) 716 { 717 struct iscsi_conn *conn = cmd->conn; 718 719 if (scsi_cmd) { 720 if (cmd->data_direction == DMA_TO_DEVICE) { 721 iscsit_stop_dataout_timer(cmd); 722 iscsit_free_r2ts_from_list(cmd); 723 } 724 if (cmd->data_direction == DMA_FROM_DEVICE) 725 iscsit_free_all_datain_reqs(cmd); 726 } 727 728 if (conn && check_queues) { 729 iscsit_remove_cmd_from_immediate_queue(cmd, conn); 730 iscsit_remove_cmd_from_response_queue(cmd, conn); 731 } 732 733 if (conn && conn->conn_transport->iscsit_release_cmd) 734 conn->conn_transport->iscsit_release_cmd(conn, cmd); 735 } 736 737 void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 738 { 739 struct se_cmd *se_cmd = NULL; 740 int rc; 741 bool op_scsi = false; 742 /* 743 * Determine if a struct se_cmd is associated with 744 * this struct iscsi_cmd. 745 */ 746 switch (cmd->iscsi_opcode) { 747 case ISCSI_OP_SCSI_CMD: 748 op_scsi = true; 749 /* 750 * Fallthrough 751 */ 752 case ISCSI_OP_SCSI_TMFUNC: 753 se_cmd = &cmd->se_cmd; 754 __iscsit_free_cmd(cmd, op_scsi, shutdown); 755 rc = transport_generic_free_cmd(se_cmd, shutdown); 756 if (!rc && shutdown && se_cmd->se_sess) { 757 __iscsit_free_cmd(cmd, op_scsi, shutdown); 758 target_put_sess_cmd(se_cmd); 759 } 760 break; 761 case ISCSI_OP_REJECT: 762 /* 763 * Handle special case for REJECT when iscsi_add_reject*() has 764 * overwritten the original iscsi_opcode assignment, and the 765 * associated cmd->se_cmd needs to be released. 766 */ 767 if (cmd->se_cmd.se_tfo != NULL) { 768 se_cmd = &cmd->se_cmd; 769 __iscsit_free_cmd(cmd, true, shutdown); 770 771 rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 772 if (!rc && shutdown && se_cmd->se_sess) { 773 __iscsit_free_cmd(cmd, true, shutdown); 774 target_put_sess_cmd(se_cmd); 775 } 776 break; 777 } 778 /* Fall-through */ 779 default: 780 __iscsit_free_cmd(cmd, false, shutdown); 781 iscsit_release_cmd(cmd); 782 break; 783 } 784 } 785 EXPORT_SYMBOL(iscsit_free_cmd); 786 787 int iscsit_check_session_usage_count(struct iscsi_session *sess) 788 { 789 spin_lock_bh(&sess->session_usage_lock); 790 if (sess->session_usage_count != 0) { 791 sess->session_waiting_on_uc = 1; 792 spin_unlock_bh(&sess->session_usage_lock); 793 if (in_interrupt()) 794 return 2; 795 796 wait_for_completion(&sess->session_waiting_on_uc_comp); 797 return 1; 798 } 799 spin_unlock_bh(&sess->session_usage_lock); 800 801 return 0; 802 } 803 804 void iscsit_dec_session_usage_count(struct iscsi_session *sess) 805 { 806 spin_lock_bh(&sess->session_usage_lock); 807 sess->session_usage_count--; 808 809 if (!sess->session_usage_count && sess->session_waiting_on_uc) 810 complete(&sess->session_waiting_on_uc_comp); 811 812 spin_unlock_bh(&sess->session_usage_lock); 813 } 814 815 void iscsit_inc_session_usage_count(struct iscsi_session *sess) 816 { 817 spin_lock_bh(&sess->session_usage_lock); 818 sess->session_usage_count++; 819 spin_unlock_bh(&sess->session_usage_lock); 820 } 821 822 struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 823 { 824 struct iscsi_conn *conn; 825 826 spin_lock_bh(&sess->conn_lock); 827 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 828 if ((conn->cid == cid) && 829 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 830 iscsit_inc_conn_usage_count(conn); 831 spin_unlock_bh(&sess->conn_lock); 832 return conn; 833 } 834 } 835 spin_unlock_bh(&sess->conn_lock); 836 837 return NULL; 838 } 839 840 struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 841 { 842 struct iscsi_conn *conn; 843 844 spin_lock_bh(&sess->conn_lock); 845 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 846 if (conn->cid == cid) { 847 iscsit_inc_conn_usage_count(conn); 848 spin_lock(&conn->state_lock); 849 atomic_set(&conn->connection_wait_rcfr, 1); 850 spin_unlock(&conn->state_lock); 851 spin_unlock_bh(&sess->conn_lock); 852 return conn; 853 } 854 } 855 spin_unlock_bh(&sess->conn_lock); 856 857 return NULL; 858 } 859 860 void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 861 { 862 spin_lock_bh(&conn->conn_usage_lock); 863 if (conn->conn_usage_count != 0) { 864 conn->conn_waiting_on_uc = 1; 865 spin_unlock_bh(&conn->conn_usage_lock); 866 867 wait_for_completion(&conn->conn_waiting_on_uc_comp); 868 return; 869 } 870 spin_unlock_bh(&conn->conn_usage_lock); 871 } 872 873 void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 874 { 875 spin_lock_bh(&conn->conn_usage_lock); 876 conn->conn_usage_count--; 877 878 if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 879 complete(&conn->conn_waiting_on_uc_comp); 880 881 spin_unlock_bh(&conn->conn_usage_lock); 882 } 883 884 void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 885 { 886 spin_lock_bh(&conn->conn_usage_lock); 887 conn->conn_usage_count++; 888 spin_unlock_bh(&conn->conn_usage_lock); 889 } 890 891 static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 892 { 893 u8 state; 894 struct iscsi_cmd *cmd; 895 896 cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 897 if (!cmd) 898 return -1; 899 900 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 901 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 902 ISTATE_SEND_NOPIN_NO_RESPONSE; 903 cmd->init_task_tag = RESERVED_ITT; 904 cmd->targ_xfer_tag = (want_response) ? 905 session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 906 spin_lock_bh(&conn->cmd_lock); 907 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 908 spin_unlock_bh(&conn->cmd_lock); 909 910 if (want_response) 911 iscsit_start_nopin_response_timer(conn); 912 iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 913 914 return 0; 915 } 916 917 static void iscsit_handle_nopin_response_timeout(unsigned long data) 918 { 919 struct iscsi_conn *conn = (struct iscsi_conn *) data; 920 921 iscsit_inc_conn_usage_count(conn); 922 923 spin_lock_bh(&conn->nopin_timer_lock); 924 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 925 spin_unlock_bh(&conn->nopin_timer_lock); 926 iscsit_dec_conn_usage_count(conn); 927 return; 928 } 929 930 pr_debug("Did not receive response to NOPIN on CID: %hu on" 931 " SID: %u, failing connection.\n", conn->cid, 932 conn->sess->sid); 933 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 934 spin_unlock_bh(&conn->nopin_timer_lock); 935 936 { 937 struct iscsi_portal_group *tpg = conn->sess->tpg; 938 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 939 940 if (tiqn) { 941 spin_lock_bh(&tiqn->sess_err_stats.lock); 942 strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 943 conn->sess->sess_ops->InitiatorName); 944 tiqn->sess_err_stats.last_sess_failure_type = 945 ISCSI_SESS_ERR_CXN_TIMEOUT; 946 tiqn->sess_err_stats.cxn_timeout_errors++; 947 atomic_long_inc(&conn->sess->conn_timeout_errors); 948 spin_unlock_bh(&tiqn->sess_err_stats.lock); 949 } 950 } 951 952 iscsit_cause_connection_reinstatement(conn, 0); 953 iscsit_dec_conn_usage_count(conn); 954 } 955 956 void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 957 { 958 struct iscsi_session *sess = conn->sess; 959 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 960 961 spin_lock_bh(&conn->nopin_timer_lock); 962 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 963 spin_unlock_bh(&conn->nopin_timer_lock); 964 return; 965 } 966 967 mod_timer(&conn->nopin_response_timer, 968 (get_jiffies_64() + na->nopin_response_timeout * HZ)); 969 spin_unlock_bh(&conn->nopin_timer_lock); 970 } 971 972 /* 973 * Called with conn->nopin_timer_lock held. 974 */ 975 void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 976 { 977 struct iscsi_session *sess = conn->sess; 978 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 979 980 spin_lock_bh(&conn->nopin_timer_lock); 981 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 982 spin_unlock_bh(&conn->nopin_timer_lock); 983 return; 984 } 985 986 init_timer(&conn->nopin_response_timer); 987 conn->nopin_response_timer.expires = 988 (get_jiffies_64() + na->nopin_response_timeout * HZ); 989 conn->nopin_response_timer.data = (unsigned long)conn; 990 conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 991 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 992 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 993 add_timer(&conn->nopin_response_timer); 994 995 pr_debug("Started NOPIN Response Timer on CID: %d to %u" 996 " seconds\n", conn->cid, na->nopin_response_timeout); 997 spin_unlock_bh(&conn->nopin_timer_lock); 998 } 999 1000 void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 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 conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1008 spin_unlock_bh(&conn->nopin_timer_lock); 1009 1010 del_timer_sync(&conn->nopin_response_timer); 1011 1012 spin_lock_bh(&conn->nopin_timer_lock); 1013 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1014 spin_unlock_bh(&conn->nopin_timer_lock); 1015 } 1016 1017 static void iscsit_handle_nopin_timeout(unsigned long data) 1018 { 1019 struct iscsi_conn *conn = (struct iscsi_conn *) data; 1020 1021 iscsit_inc_conn_usage_count(conn); 1022 1023 spin_lock_bh(&conn->nopin_timer_lock); 1024 if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1025 spin_unlock_bh(&conn->nopin_timer_lock); 1026 iscsit_dec_conn_usage_count(conn); 1027 return; 1028 } 1029 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1030 spin_unlock_bh(&conn->nopin_timer_lock); 1031 1032 iscsit_add_nopin(conn, 1); 1033 iscsit_dec_conn_usage_count(conn); 1034 } 1035 1036 /* 1037 * Called with conn->nopin_timer_lock held. 1038 */ 1039 void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1040 { 1041 struct iscsi_session *sess = conn->sess; 1042 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1043 /* 1044 * NOPIN timeout is disabled. 1045 */ 1046 if (!na->nopin_timeout) 1047 return; 1048 1049 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1050 return; 1051 1052 init_timer(&conn->nopin_timer); 1053 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1054 conn->nopin_timer.data = (unsigned long)conn; 1055 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1056 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1057 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1058 add_timer(&conn->nopin_timer); 1059 1060 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1061 " interval\n", conn->cid, na->nopin_timeout); 1062 } 1063 1064 void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1065 { 1066 struct iscsi_session *sess = conn->sess; 1067 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1068 /* 1069 * NOPIN timeout is disabled.. 1070 */ 1071 if (!na->nopin_timeout) 1072 return; 1073 1074 spin_lock_bh(&conn->nopin_timer_lock); 1075 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1076 spin_unlock_bh(&conn->nopin_timer_lock); 1077 return; 1078 } 1079 1080 init_timer(&conn->nopin_timer); 1081 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1082 conn->nopin_timer.data = (unsigned long)conn; 1083 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1084 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1085 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1086 add_timer(&conn->nopin_timer); 1087 1088 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1089 " interval\n", conn->cid, na->nopin_timeout); 1090 spin_unlock_bh(&conn->nopin_timer_lock); 1091 } 1092 1093 void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1094 { 1095 spin_lock_bh(&conn->nopin_timer_lock); 1096 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1097 spin_unlock_bh(&conn->nopin_timer_lock); 1098 return; 1099 } 1100 conn->nopin_timer_flags |= ISCSI_TF_STOP; 1101 spin_unlock_bh(&conn->nopin_timer_lock); 1102 1103 del_timer_sync(&conn->nopin_timer); 1104 1105 spin_lock_bh(&conn->nopin_timer_lock); 1106 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1107 spin_unlock_bh(&conn->nopin_timer_lock); 1108 } 1109 1110 int iscsit_send_tx_data( 1111 struct iscsi_cmd *cmd, 1112 struct iscsi_conn *conn, 1113 int use_misc) 1114 { 1115 int tx_sent, tx_size; 1116 u32 iov_count; 1117 struct kvec *iov; 1118 1119 send_data: 1120 tx_size = cmd->tx_size; 1121 1122 if (!use_misc) { 1123 iov = &cmd->iov_data[0]; 1124 iov_count = cmd->iov_data_count; 1125 } else { 1126 iov = &cmd->iov_misc[0]; 1127 iov_count = cmd->iov_misc_count; 1128 } 1129 1130 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1131 if (tx_size != tx_sent) { 1132 if (tx_sent == -EAGAIN) { 1133 pr_err("tx_data() returned -EAGAIN\n"); 1134 goto send_data; 1135 } else 1136 return -1; 1137 } 1138 cmd->tx_size = 0; 1139 1140 return 0; 1141 } 1142 1143 int iscsit_fe_sendpage_sg( 1144 struct iscsi_cmd *cmd, 1145 struct iscsi_conn *conn) 1146 { 1147 struct scatterlist *sg = cmd->first_data_sg; 1148 struct kvec iov; 1149 u32 tx_hdr_size, data_len; 1150 u32 offset = cmd->first_data_sg_off; 1151 int tx_sent, iov_off; 1152 1153 send_hdr: 1154 tx_hdr_size = ISCSI_HDR_LEN; 1155 if (conn->conn_ops->HeaderDigest) 1156 tx_hdr_size += ISCSI_CRC_LEN; 1157 1158 iov.iov_base = cmd->pdu; 1159 iov.iov_len = tx_hdr_size; 1160 1161 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1162 if (tx_hdr_size != tx_sent) { 1163 if (tx_sent == -EAGAIN) { 1164 pr_err("tx_data() returned -EAGAIN\n"); 1165 goto send_hdr; 1166 } 1167 return -1; 1168 } 1169 1170 data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 1171 /* 1172 * Set iov_off used by padding and data digest tx_data() calls below 1173 * in order to determine proper offset into cmd->iov_data[] 1174 */ 1175 if (conn->conn_ops->DataDigest) { 1176 data_len -= ISCSI_CRC_LEN; 1177 if (cmd->padding) 1178 iov_off = (cmd->iov_data_count - 2); 1179 else 1180 iov_off = (cmd->iov_data_count - 1); 1181 } else { 1182 iov_off = (cmd->iov_data_count - 1); 1183 } 1184 /* 1185 * Perform sendpage() for each page in the scatterlist 1186 */ 1187 while (data_len) { 1188 u32 space = (sg->length - offset); 1189 u32 sub_len = min_t(u32, data_len, space); 1190 send_pg: 1191 tx_sent = conn->sock->ops->sendpage(conn->sock, 1192 sg_page(sg), sg->offset + offset, sub_len, 0); 1193 if (tx_sent != sub_len) { 1194 if (tx_sent == -EAGAIN) { 1195 pr_err("tcp_sendpage() returned" 1196 " -EAGAIN\n"); 1197 goto send_pg; 1198 } 1199 1200 pr_err("tcp_sendpage() failure: %d\n", 1201 tx_sent); 1202 return -1; 1203 } 1204 1205 data_len -= sub_len; 1206 offset = 0; 1207 sg = sg_next(sg); 1208 } 1209 1210 send_padding: 1211 if (cmd->padding) { 1212 struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1213 1214 tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1215 if (cmd->padding != tx_sent) { 1216 if (tx_sent == -EAGAIN) { 1217 pr_err("tx_data() returned -EAGAIN\n"); 1218 goto send_padding; 1219 } 1220 return -1; 1221 } 1222 } 1223 1224 send_datacrc: 1225 if (conn->conn_ops->DataDigest) { 1226 struct kvec *iov_d = &cmd->iov_data[iov_off]; 1227 1228 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1229 if (ISCSI_CRC_LEN != tx_sent) { 1230 if (tx_sent == -EAGAIN) { 1231 pr_err("tx_data() returned -EAGAIN\n"); 1232 goto send_datacrc; 1233 } 1234 return -1; 1235 } 1236 } 1237 1238 return 0; 1239 } 1240 1241 /* 1242 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1243 * back to the Initiator when an expection condition occurs with the 1244 * errors set in status_class and status_detail. 1245 * 1246 * Parameters: iSCSI Connection, Status Class, Status Detail. 1247 * Returns: 0 on success, -1 on error. 1248 */ 1249 int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1250 { 1251 struct iscsi_login_rsp *hdr; 1252 struct iscsi_login *login = conn->conn_login; 1253 1254 login->login_failed = 1; 1255 iscsit_collect_login_stats(conn, status_class, status_detail); 1256 1257 memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 1258 1259 hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1260 hdr->opcode = ISCSI_OP_LOGIN_RSP; 1261 hdr->status_class = status_class; 1262 hdr->status_detail = status_detail; 1263 hdr->itt = conn->login_itt; 1264 1265 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1266 } 1267 1268 void iscsit_print_session_params(struct iscsi_session *sess) 1269 { 1270 struct iscsi_conn *conn; 1271 1272 pr_debug("-----------------------------[Session Params for" 1273 " SID: %u]-----------------------------\n", sess->sid); 1274 spin_lock_bh(&sess->conn_lock); 1275 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1276 iscsi_dump_conn_ops(conn->conn_ops); 1277 spin_unlock_bh(&sess->conn_lock); 1278 1279 iscsi_dump_sess_ops(sess->sess_ops); 1280 } 1281 1282 static int iscsit_do_rx_data( 1283 struct iscsi_conn *conn, 1284 struct iscsi_data_count *count) 1285 { 1286 int data = count->data_length, rx_loop = 0, total_rx = 0; 1287 struct msghdr msg; 1288 1289 if (!conn || !conn->sock || !conn->conn_ops) 1290 return -1; 1291 1292 memset(&msg, 0, sizeof(struct msghdr)); 1293 iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1294 count->iov, count->iov_count, data); 1295 1296 while (msg_data_left(&msg)) { 1297 rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1298 if (rx_loop <= 0) { 1299 pr_debug("rx_loop: %d total_rx: %d\n", 1300 rx_loop, total_rx); 1301 return rx_loop; 1302 } 1303 total_rx += rx_loop; 1304 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1305 rx_loop, total_rx, data); 1306 } 1307 1308 return total_rx; 1309 } 1310 1311 int rx_data( 1312 struct iscsi_conn *conn, 1313 struct kvec *iov, 1314 int iov_count, 1315 int data) 1316 { 1317 struct iscsi_data_count c; 1318 1319 if (!conn || !conn->sock || !conn->conn_ops) 1320 return -1; 1321 1322 memset(&c, 0, sizeof(struct iscsi_data_count)); 1323 c.iov = iov; 1324 c.iov_count = iov_count; 1325 c.data_length = data; 1326 c.type = ISCSI_RX_DATA; 1327 1328 return iscsit_do_rx_data(conn, &c); 1329 } 1330 1331 int tx_data( 1332 struct iscsi_conn *conn, 1333 struct kvec *iov, 1334 int iov_count, 1335 int data) 1336 { 1337 struct msghdr msg; 1338 int total_tx = 0; 1339 1340 if (!conn || !conn->sock || !conn->conn_ops) 1341 return -1; 1342 1343 if (data <= 0) { 1344 pr_err("Data length is: %d\n", data); 1345 return -1; 1346 } 1347 1348 memset(&msg, 0, sizeof(struct msghdr)); 1349 1350 iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 1351 iov, iov_count, data); 1352 1353 while (msg_data_left(&msg)) { 1354 int tx_loop = sock_sendmsg(conn->sock, &msg); 1355 if (tx_loop <= 0) { 1356 pr_debug("tx_loop: %d total_tx %d\n", 1357 tx_loop, total_tx); 1358 return tx_loop; 1359 } 1360 total_tx += tx_loop; 1361 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1362 tx_loop, total_tx, data); 1363 } 1364 1365 return total_tx; 1366 } 1367 1368 void iscsit_collect_login_stats( 1369 struct iscsi_conn *conn, 1370 u8 status_class, 1371 u8 status_detail) 1372 { 1373 struct iscsi_param *intrname = NULL; 1374 struct iscsi_tiqn *tiqn; 1375 struct iscsi_login_stats *ls; 1376 1377 tiqn = iscsit_snmp_get_tiqn(conn); 1378 if (!tiqn) 1379 return; 1380 1381 ls = &tiqn->login_stats; 1382 1383 spin_lock(&ls->lock); 1384 if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1385 ls->accepts++; 1386 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1387 ls->redirects++; 1388 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1389 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1390 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1391 ls->authenticate_fails++; 1392 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1393 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1394 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1395 ls->authorize_fails++; 1396 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1397 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1398 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1399 ls->negotiate_fails++; 1400 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1401 } else { 1402 ls->other_fails++; 1403 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1404 } 1405 1406 /* Save initiator name, ip address and time, if it is a failed login */ 1407 if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1408 if (conn->param_list) 1409 intrname = iscsi_find_param_from_key(INITIATORNAME, 1410 conn->param_list); 1411 strlcpy(ls->last_intr_fail_name, 1412 (intrname ? intrname->value : "Unknown"), 1413 sizeof(ls->last_intr_fail_name)); 1414 1415 ls->last_intr_fail_ip_family = conn->login_family; 1416 1417 ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1418 ls->last_fail_time = get_jiffies_64(); 1419 } 1420 1421 spin_unlock(&ls->lock); 1422 } 1423 1424 struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1425 { 1426 struct iscsi_portal_group *tpg; 1427 1428 if (!conn) 1429 return NULL; 1430 1431 tpg = conn->tpg; 1432 if (!tpg) 1433 return NULL; 1434 1435 if (!tpg->tpg_tiqn) 1436 return NULL; 1437 1438 return tpg->tpg_tiqn; 1439 } 1440