FILE
iscsi_target_util.c
File preview with syntax highlighting.
linux-6.19.14/drivers/target/iscsi/iscsi_target_util.c
1// SPDX-License-Identifier: GPL-2.0-or-later 2/******************************************************************************* 3 * This file contains the iSCSI Target specific utility functions. 4 * 5 * (c) Copyright 2007-2013 Datera, Inc. 6 * 7 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 8 * 9 ******************************************************************************/ 10 11#include <linux/list.h> 12#include <linux/sched/signal.h> 13#include <net/ipv6.h> /* ipv6_addr_equal() */ 14#include <scsi/scsi_tcq.h> 15#include <scsi/iscsi_proto.h> 16#include <target/target_core_base.h> 17#include <target/target_core_fabric.h> 18#include <target/iscsi/iscsi_transport.h> 19 20#include <target/iscsi/iscsi_target_core.h> 21#include "iscsi_target_parameters.h" 22#include "iscsi_target_seq_pdu_list.h" 23#include "iscsi_target_datain_values.h" 24#include "iscsi_target_erl0.h" 25#include "iscsi_target_erl1.h" 26#include "iscsi_target_erl2.h" 27#include "iscsi_target_tpg.h" 28#include "iscsi_target_util.h" 29#include "iscsi_target.h" 30 31extern struct list_head g_tiqn_list; 32extern spinlock_t tiqn_lock; 33 34int iscsit_add_r2t_to_list( 35 struct iscsit_cmd *cmd, 36 u32 offset, 37 u32 xfer_len, 38 int recovery, 39 u32 r2t_sn) 40{ 41 struct iscsi_r2t *r2t; 42 43 lockdep_assert_held(&cmd->r2t_lock); 44 45 WARN_ON_ONCE((s32)xfer_len < 0); 46 47 r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 48 if (!r2t) { 49 pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 50 return -1; 51 } 52 INIT_LIST_HEAD(&r2t->r2t_list); 53 54 r2t->recovery_r2t = recovery; 55 r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 56 r2t->offset = offset; 57 r2t->xfer_len = xfer_len; 58 list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 59 spin_unlock_bh(&cmd->r2t_lock); 60 61 iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 62 63 spin_lock_bh(&cmd->r2t_lock); 64 return 0; 65} 66 67struct iscsi_r2t *iscsit_get_r2t_for_eos( 68 struct iscsit_cmd *cmd, 69 u32 offset, 70 u32 length) 71{ 72 struct iscsi_r2t *r2t; 73 74 spin_lock_bh(&cmd->r2t_lock); 75 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 76 if ((r2t->offset <= offset) && 77 (r2t->offset + r2t->xfer_len) >= (offset + length)) { 78 spin_unlock_bh(&cmd->r2t_lock); 79 return r2t; 80 } 81 } 82 spin_unlock_bh(&cmd->r2t_lock); 83 84 pr_err("Unable to locate R2T for Offset: %u, Length:" 85 " %u\n", offset, length); 86 return NULL; 87} 88 89struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsit_cmd *cmd) 90{ 91 struct iscsi_r2t *r2t; 92 93 spin_lock_bh(&cmd->r2t_lock); 94 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 95 if (!r2t->sent_r2t) { 96 spin_unlock_bh(&cmd->r2t_lock); 97 return r2t; 98 } 99 } 100 spin_unlock_bh(&cmd->r2t_lock); 101 102 pr_err("Unable to locate next R2T to send for ITT:" 103 " 0x%08x.\n", cmd->init_task_tag); 104 return NULL; 105} 106 107void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsit_cmd *cmd) 108{ 109 lockdep_assert_held(&cmd->r2t_lock); 110 111 list_del(&r2t->r2t_list); 112 kmem_cache_free(lio_r2t_cache, r2t); 113} 114 115void iscsit_free_r2ts_from_list(struct iscsit_cmd *cmd) 116{ 117 struct iscsi_r2t *r2t, *r2t_tmp; 118 119 spin_lock_bh(&cmd->r2t_lock); 120 list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 121 iscsit_free_r2t(r2t, cmd); 122 spin_unlock_bh(&cmd->r2t_lock); 123} 124 125static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) 126{ 127 int tag = -1; 128 DEFINE_SBQ_WAIT(wait); 129 struct sbq_wait_state *ws; 130 struct sbitmap_queue *sbq; 131 132 if (state == TASK_RUNNING) 133 return tag; 134 135 sbq = &se_sess->sess_tag_pool; 136 ws = &sbq->ws[0]; 137 for (;;) { 138 sbitmap_prepare_to_wait(sbq, ws, &wait, state); 139 if (signal_pending_state(state, current)) 140 break; 141 tag = sbitmap_queue_get(sbq, cpup); 142 if (tag >= 0) 143 break; 144 schedule(); 145 } 146 147 sbitmap_finish_wait(sbq, ws, &wait); 148 return tag; 149} 150 151/* 152 * May be called from software interrupt (timer) context for allocating 153 * iSCSI NopINs. 154 */ 155struct iscsit_cmd *iscsit_allocate_cmd(struct iscsit_conn *conn, int state) 156{ 157 struct iscsit_cmd *cmd; 158 struct se_session *se_sess = conn->sess->se_sess; 159 int size, tag, cpu; 160 161 tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); 162 if (tag < 0) 163 tag = iscsit_wait_for_tag(se_sess, state, &cpu); 164 if (tag < 0) 165 return NULL; 166 167 size = sizeof(struct iscsit_cmd) + conn->conn_transport->priv_size; 168 cmd = (struct iscsit_cmd *)(se_sess->sess_cmd_map + (tag * size)); 169 memset(cmd, 0, size); 170 171 cmd->se_cmd.map_tag = tag; 172 cmd->se_cmd.map_cpu = cpu; 173 cmd->conn = conn; 174 cmd->data_direction = DMA_NONE; 175 INIT_LIST_HEAD(&cmd->i_conn_node); 176 INIT_LIST_HEAD(&cmd->datain_list); 177 INIT_LIST_HEAD(&cmd->cmd_r2t_list); 178 spin_lock_init(&cmd->datain_lock); 179 spin_lock_init(&cmd->dataout_timeout_lock); 180 spin_lock_init(&cmd->istate_lock); 181 spin_lock_init(&cmd->error_lock); 182 spin_lock_init(&cmd->r2t_lock); 183 timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 184 185 return cmd; 186} 187EXPORT_SYMBOL(iscsit_allocate_cmd); 188 189struct iscsi_seq *iscsit_get_seq_holder_for_datain( 190 struct iscsit_cmd *cmd, 191 u32 seq_send_order) 192{ 193 u32 i; 194 195 for (i = 0; i < cmd->seq_count; i++) 196 if (cmd->seq_list[i].seq_send_order == seq_send_order) 197 return &cmd->seq_list[i]; 198 199 return NULL; 200} 201 202struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsit_cmd *cmd) 203{ 204 u32 i; 205 206 if (!cmd->seq_list) { 207 pr_err("struct iscsit_cmd->seq_list is NULL!\n"); 208 return NULL; 209 } 210 211 for (i = 0; i < cmd->seq_count; i++) { 212 if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 213 continue; 214 if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 215 cmd->seq_send_order++; 216 return &cmd->seq_list[i]; 217 } 218 } 219 220 return NULL; 221} 222 223struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 224 struct iscsit_cmd *cmd, 225 u32 r2t_sn) 226{ 227 struct iscsi_r2t *r2t; 228 229 spin_lock_bh(&cmd->r2t_lock); 230 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 231 if (r2t->r2t_sn == r2t_sn) { 232 spin_unlock_bh(&cmd->r2t_lock); 233 return r2t; 234 } 235 } 236 spin_unlock_bh(&cmd->r2t_lock); 237 238 return NULL; 239} 240 241static inline int iscsit_check_received_cmdsn(struct iscsit_session *sess, u32 cmdsn) 242{ 243 u32 max_cmdsn; 244 int ret; 245 246 /* 247 * This is the proper method of checking received CmdSN against 248 * ExpCmdSN and MaxCmdSN values, as well as accounting for out 249 * or order CmdSNs due to multiple connection sessions and/or 250 * CRC failures. 251 */ 252 max_cmdsn = atomic_read(&sess->max_cmd_sn); 253 if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 254 pr_err("Received CmdSN: 0x%08x is greater than" 255 " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 256 ret = CMDSN_MAXCMDSN_OVERRUN; 257 258 } else if (cmdsn == sess->exp_cmd_sn) { 259 sess->exp_cmd_sn++; 260 pr_debug("Received CmdSN matches ExpCmdSN," 261 " incremented ExpCmdSN to: 0x%08x\n", 262 sess->exp_cmd_sn); 263 ret = CMDSN_NORMAL_OPERATION; 264 265 } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 266 pr_debug("Received CmdSN: 0x%08x is greater" 267 " than ExpCmdSN: 0x%08x, not acknowledging.\n", 268 cmdsn, sess->exp_cmd_sn); 269 ret = CMDSN_HIGHER_THAN_EXP; 270 271 } else { 272 pr_err("Received CmdSN: 0x%08x is less than" 273 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 274 sess->exp_cmd_sn); 275 ret = CMDSN_LOWER_THAN_EXP; 276 } 277 278 return ret; 279} 280 281/* 282 * Commands may be received out of order if MC/S is in use. 283 * Ensure they are executed in CmdSN order. 284 */ 285int iscsit_sequence_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd, 286 unsigned char *buf, __be32 cmdsn) 287{ 288 int ret, cmdsn_ret; 289 bool reject = false; 290 u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 291 292 mutex_lock(&conn->sess->cmdsn_mutex); 293 294 cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 295 switch (cmdsn_ret) { 296 case CMDSN_NORMAL_OPERATION: 297 ret = iscsit_execute_cmd(cmd, 0); 298 if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 299 iscsit_execute_ooo_cmdsns(conn->sess); 300 else if (ret < 0) { 301 reject = true; 302 ret = CMDSN_ERROR_CANNOT_RECOVER; 303 } 304 break; 305 case CMDSN_HIGHER_THAN_EXP: 306 ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 307 if (ret < 0) { 308 reject = true; 309 ret = CMDSN_ERROR_CANNOT_RECOVER; 310 break; 311 } 312 ret = CMDSN_HIGHER_THAN_EXP; 313 break; 314 case CMDSN_LOWER_THAN_EXP: 315 case CMDSN_MAXCMDSN_OVERRUN: 316 default: 317 cmd->i_state = ISTATE_REMOVE; 318 iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 319 /* 320 * Existing callers for iscsit_sequence_cmd() will silently 321 * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 322 * return for CMDSN_MAXCMDSN_OVERRUN as well.. 323 */ 324 ret = CMDSN_LOWER_THAN_EXP; 325 break; 326 } 327 mutex_unlock(&conn->sess->cmdsn_mutex); 328 329 if (reject) 330 iscsit_reject_cmd(cmd, reason, buf); 331 332 return ret; 333} 334EXPORT_SYMBOL(iscsit_sequence_cmd); 335 336struct iscsit_cmd *iscsit_find_cmd_from_itt( 337 struct iscsit_conn *conn, 338 itt_t init_task_tag) 339{ 340 struct iscsit_cmd *cmd; 341 342 spin_lock_bh(&conn->cmd_lock); 343 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 344 if (cmd->init_task_tag == init_task_tag) { 345 spin_unlock_bh(&conn->cmd_lock); 346 return cmd; 347 } 348 } 349 spin_unlock_bh(&conn->cmd_lock); 350 351 pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 352 init_task_tag, conn->cid); 353 return NULL; 354} 355EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 356 357struct iscsit_cmd *iscsit_find_cmd_from_itt_or_dump( 358 struct iscsit_conn *conn, 359 itt_t init_task_tag, 360 u32 length) 361{ 362 struct iscsit_cmd *cmd; 363 364 spin_lock_bh(&conn->cmd_lock); 365 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 366 if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 367 continue; 368 if (cmd->init_task_tag == init_task_tag) { 369 spin_unlock_bh(&conn->cmd_lock); 370 return cmd; 371 } 372 } 373 spin_unlock_bh(&conn->cmd_lock); 374 375 pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 376 " dumping payload\n", init_task_tag, conn->cid); 377 if (length) 378 iscsit_dump_data_payload(conn, length, 1); 379 380 return NULL; 381} 382EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 383 384struct iscsit_cmd *iscsit_find_cmd_from_ttt( 385 struct iscsit_conn *conn, 386 u32 targ_xfer_tag) 387{ 388 struct iscsit_cmd *cmd = NULL; 389 390 spin_lock_bh(&conn->cmd_lock); 391 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 392 if (cmd->targ_xfer_tag == targ_xfer_tag) { 393 spin_unlock_bh(&conn->cmd_lock); 394 return cmd; 395 } 396 } 397 spin_unlock_bh(&conn->cmd_lock); 398 399 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 400 targ_xfer_tag, conn->cid); 401 return NULL; 402} 403 404int iscsit_find_cmd_for_recovery( 405 struct iscsit_session *sess, 406 struct iscsit_cmd **cmd_ptr, 407 struct iscsi_conn_recovery **cr_ptr, 408 itt_t init_task_tag) 409{ 410 struct iscsit_cmd *cmd = NULL; 411 struct iscsi_conn_recovery *cr; 412 /* 413 * Scan through the inactive connection recovery list's command list. 414 * If init_task_tag matches the command is still alligent. 415 */ 416 spin_lock(&sess->cr_i_lock); 417 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 418 spin_lock(&cr->conn_recovery_cmd_lock); 419 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 420 if (cmd->init_task_tag == init_task_tag) { 421 spin_unlock(&cr->conn_recovery_cmd_lock); 422 spin_unlock(&sess->cr_i_lock); 423 424 *cr_ptr = cr; 425 *cmd_ptr = cmd; 426 return -2; 427 } 428 } 429 spin_unlock(&cr->conn_recovery_cmd_lock); 430 } 431 spin_unlock(&sess->cr_i_lock); 432 /* 433 * Scan through the active connection recovery list's command list. 434 * If init_task_tag matches the command is ready to be reassigned. 435 */ 436 spin_lock(&sess->cr_a_lock); 437 list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 438 spin_lock(&cr->conn_recovery_cmd_lock); 439 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 440 if (cmd->init_task_tag == init_task_tag) { 441 spin_unlock(&cr->conn_recovery_cmd_lock); 442 spin_unlock(&sess->cr_a_lock); 443 444 *cr_ptr = cr; 445 *cmd_ptr = cmd; 446 return 0; 447 } 448 } 449 spin_unlock(&cr->conn_recovery_cmd_lock); 450 } 451 spin_unlock(&sess->cr_a_lock); 452 453 return -1; 454} 455 456void iscsit_add_cmd_to_immediate_queue( 457 struct iscsit_cmd *cmd, 458 struct iscsit_conn *conn, 459 u8 state) 460{ 461 struct iscsi_queue_req *qr; 462 463 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 464 if (!qr) { 465 pr_err("Unable to allocate memory for" 466 " struct iscsi_queue_req\n"); 467 return; 468 } 469 INIT_LIST_HEAD(&qr->qr_list); 470 qr->cmd = cmd; 471 qr->state = state; 472 473 spin_lock_bh(&conn->immed_queue_lock); 474 list_add_tail(&qr->qr_list, &conn->immed_queue_list); 475 atomic_inc(&cmd->immed_queue_count); 476 atomic_set(&conn->check_immediate_queue, 1); 477 spin_unlock_bh(&conn->immed_queue_lock); 478 479 wake_up(&conn->queues_wq); 480} 481EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 482 483struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsit_conn *conn) 484{ 485 struct iscsi_queue_req *qr; 486 487 spin_lock_bh(&conn->immed_queue_lock); 488 if (list_empty(&conn->immed_queue_list)) { 489 spin_unlock_bh(&conn->immed_queue_lock); 490 return NULL; 491 } 492 qr = list_first_entry(&conn->immed_queue_list, 493 struct iscsi_queue_req, qr_list); 494 495 list_del(&qr->qr_list); 496 if (qr->cmd) 497 atomic_dec(&qr->cmd->immed_queue_count); 498 spin_unlock_bh(&conn->immed_queue_lock); 499 500 return qr; 501} 502 503static void iscsit_remove_cmd_from_immediate_queue( 504 struct iscsit_cmd *cmd, 505 struct iscsit_conn *conn) 506{ 507 struct iscsi_queue_req *qr, *qr_tmp; 508 509 spin_lock_bh(&conn->immed_queue_lock); 510 if (!atomic_read(&cmd->immed_queue_count)) { 511 spin_unlock_bh(&conn->immed_queue_lock); 512 return; 513 } 514 515 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 516 if (qr->cmd != cmd) 517 continue; 518 519 atomic_dec(&qr->cmd->immed_queue_count); 520 list_del(&qr->qr_list); 521 kmem_cache_free(lio_qr_cache, qr); 522 } 523 spin_unlock_bh(&conn->immed_queue_lock); 524 525 if (atomic_read(&cmd->immed_queue_count)) { 526 pr_err("ITT: 0x%08x immed_queue_count: %d\n", 527 cmd->init_task_tag, 528 atomic_read(&cmd->immed_queue_count)); 529 } 530} 531 532int iscsit_add_cmd_to_response_queue( 533 struct iscsit_cmd *cmd, 534 struct iscsit_conn *conn, 535 u8 state) 536{ 537 struct iscsi_queue_req *qr; 538 539 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 540 if (!qr) { 541 pr_err("Unable to allocate memory for" 542 " struct iscsi_queue_req\n"); 543 return -ENOMEM; 544 } 545 INIT_LIST_HEAD(&qr->qr_list); 546 qr->cmd = cmd; 547 qr->state = state; 548 549 spin_lock_bh(&conn->response_queue_lock); 550 list_add_tail(&qr->qr_list, &conn->response_queue_list); 551 atomic_inc(&cmd->response_queue_count); 552 spin_unlock_bh(&conn->response_queue_lock); 553 554 wake_up(&conn->queues_wq); 555 return 0; 556} 557 558struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsit_conn *conn) 559{ 560 struct iscsi_queue_req *qr; 561 562 spin_lock_bh(&conn->response_queue_lock); 563 if (list_empty(&conn->response_queue_list)) { 564 spin_unlock_bh(&conn->response_queue_lock); 565 return NULL; 566 } 567 568 qr = list_first_entry(&conn->response_queue_list, 569 struct iscsi_queue_req, qr_list); 570 571 list_del(&qr->qr_list); 572 if (qr->cmd) 573 atomic_dec(&qr->cmd->response_queue_count); 574 spin_unlock_bh(&conn->response_queue_lock); 575 576 return qr; 577} 578 579static void iscsit_remove_cmd_from_response_queue( 580 struct iscsit_cmd *cmd, 581 struct iscsit_conn *conn) 582{ 583 struct iscsi_queue_req *qr, *qr_tmp; 584 585 spin_lock_bh(&conn->response_queue_lock); 586 if (!atomic_read(&cmd->response_queue_count)) { 587 spin_unlock_bh(&conn->response_queue_lock); 588 return; 589 } 590 591 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 592 qr_list) { 593 if (qr->cmd != cmd) 594 continue; 595 596 atomic_dec(&qr->cmd->response_queue_count); 597 list_del(&qr->qr_list); 598 kmem_cache_free(lio_qr_cache, qr); 599 } 600 spin_unlock_bh(&conn->response_queue_lock); 601 602 if (atomic_read(&cmd->response_queue_count)) { 603 pr_err("ITT: 0x%08x response_queue_count: %d\n", 604 cmd->init_task_tag, 605 atomic_read(&cmd->response_queue_count)); 606 } 607} 608 609bool iscsit_conn_all_queues_empty(struct iscsit_conn *conn) 610{ 611 bool empty; 612 613 spin_lock_bh(&conn->immed_queue_lock); 614 empty = list_empty(&conn->immed_queue_list); 615 spin_unlock_bh(&conn->immed_queue_lock); 616 617 if (!empty) 618 return empty; 619 620 spin_lock_bh(&conn->response_queue_lock); 621 empty = list_empty(&conn->response_queue_list); 622 spin_unlock_bh(&conn->response_queue_lock); 623 624 return empty; 625} 626 627void iscsit_free_queue_reqs_for_conn(struct iscsit_conn *conn) 628{ 629 struct iscsi_queue_req *qr, *qr_tmp; 630 631 spin_lock_bh(&conn->immed_queue_lock); 632 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 633 list_del(&qr->qr_list); 634 if (qr->cmd) 635 atomic_dec(&qr->cmd->immed_queue_count); 636 637 kmem_cache_free(lio_qr_cache, qr); 638 } 639 spin_unlock_bh(&conn->immed_queue_lock); 640 641 spin_lock_bh(&conn->response_queue_lock); 642 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 643 qr_list) { 644 list_del(&qr->qr_list); 645 if (qr->cmd) 646 atomic_dec(&qr->cmd->response_queue_count); 647 648 kmem_cache_free(lio_qr_cache, qr); 649 } 650 spin_unlock_bh(&conn->response_queue_lock); 651} 652 653void iscsit_release_cmd(struct iscsit_cmd *cmd) 654{ 655 struct iscsit_session *sess; 656 struct se_cmd *se_cmd = &cmd->se_cmd; 657 658 WARN_ON(!list_empty(&cmd->i_conn_node)); 659 660 if (cmd->conn) 661 sess = cmd->conn->sess; 662 else 663 sess = cmd->sess; 664 665 BUG_ON(!sess || !sess->se_sess); 666 667 kfree(cmd->buf_ptr); 668 kfree(cmd->pdu_list); 669 kfree(cmd->seq_list); 670 kfree(cmd->tmr_req); 671 kfree(cmd->overflow_buf); 672 kfree(cmd->iov_data); 673 kfree(cmd->text_in_ptr); 674 675 target_free_tag(sess->se_sess, se_cmd); 676} 677EXPORT_SYMBOL(iscsit_release_cmd); 678 679void __iscsit_free_cmd(struct iscsit_cmd *cmd, bool check_queues) 680{ 681 struct iscsit_conn *conn = cmd->conn; 682 683 WARN_ON(!list_empty(&cmd->i_conn_node)); 684 685 if (cmd->data_direction == DMA_TO_DEVICE) { 686 iscsit_stop_dataout_timer(cmd); 687 iscsit_free_r2ts_from_list(cmd); 688 } 689 if (cmd->data_direction == DMA_FROM_DEVICE) 690 iscsit_free_all_datain_reqs(cmd); 691 692 if (conn && check_queues) { 693 iscsit_remove_cmd_from_immediate_queue(cmd, conn); 694 iscsit_remove_cmd_from_response_queue(cmd, conn); 695 } 696 697 if (conn && conn->conn_transport->iscsit_unmap_cmd) 698 conn->conn_transport->iscsit_unmap_cmd(conn, cmd); 699} 700 701void iscsit_free_cmd(struct iscsit_cmd *cmd, bool shutdown) 702{ 703 struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 704 int rc; 705 706 WARN_ON(!list_empty(&cmd->i_conn_node)); 707 708 __iscsit_free_cmd(cmd, shutdown); 709 if (se_cmd) { 710 rc = transport_generic_free_cmd(se_cmd, shutdown); 711 if (!rc && shutdown && se_cmd->se_sess) { 712 __iscsit_free_cmd(cmd, shutdown); 713 target_put_sess_cmd(se_cmd); 714 } 715 } else { 716 iscsit_release_cmd(cmd); 717 } 718} 719EXPORT_SYMBOL(iscsit_free_cmd); 720 721bool iscsit_check_session_usage_count(struct iscsit_session *sess, 722 bool can_sleep) 723{ 724 spin_lock_bh(&sess->session_usage_lock); 725 if (sess->session_usage_count != 0) { 726 sess->session_waiting_on_uc = 1; 727 spin_unlock_bh(&sess->session_usage_lock); 728 if (!can_sleep) 729 return true; 730 731 wait_for_completion(&sess->session_waiting_on_uc_comp); 732 return false; 733 } 734 spin_unlock_bh(&sess->session_usage_lock); 735 736 return false; 737} 738 739void iscsit_dec_session_usage_count(struct iscsit_session *sess) 740{ 741 spin_lock_bh(&sess->session_usage_lock); 742 sess->session_usage_count--; 743 744 if (!sess->session_usage_count && sess->session_waiting_on_uc) { 745 spin_unlock_bh(&sess->session_usage_lock); 746 complete(&sess->session_waiting_on_uc_comp); 747 return; 748 } 749 750 spin_unlock_bh(&sess->session_usage_lock); 751} 752 753void iscsit_inc_session_usage_count(struct iscsit_session *sess) 754{ 755 spin_lock_bh(&sess->session_usage_lock); 756 sess->session_usage_count++; 757 spin_unlock_bh(&sess->session_usage_lock); 758} 759 760struct iscsit_conn *iscsit_get_conn_from_cid(struct iscsit_session *sess, u16 cid) 761{ 762 struct iscsit_conn *conn; 763 764 spin_lock_bh(&sess->conn_lock); 765 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 766 if ((conn->cid == cid) && 767 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 768 iscsit_inc_conn_usage_count(conn); 769 spin_unlock_bh(&sess->conn_lock); 770 return conn; 771 } 772 } 773 spin_unlock_bh(&sess->conn_lock); 774 775 return NULL; 776} 777 778struct iscsit_conn *iscsit_get_conn_from_cid_rcfr(struct iscsit_session *sess, u16 cid) 779{ 780 struct iscsit_conn *conn; 781 782 spin_lock_bh(&sess->conn_lock); 783 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 784 if (conn->cid == cid) { 785 iscsit_inc_conn_usage_count(conn); 786 spin_lock(&conn->state_lock); 787 atomic_set(&conn->connection_wait_rcfr, 1); 788 spin_unlock(&conn->state_lock); 789 spin_unlock_bh(&sess->conn_lock); 790 return conn; 791 } 792 } 793 spin_unlock_bh(&sess->conn_lock); 794 795 return NULL; 796} 797 798void iscsit_check_conn_usage_count(struct iscsit_conn *conn) 799{ 800 spin_lock_bh(&conn->conn_usage_lock); 801 if (conn->conn_usage_count != 0) { 802 conn->conn_waiting_on_uc = 1; 803 spin_unlock_bh(&conn->conn_usage_lock); 804 805 wait_for_completion(&conn->conn_waiting_on_uc_comp); 806 return; 807 } 808 spin_unlock_bh(&conn->conn_usage_lock); 809} 810 811void iscsit_dec_conn_usage_count(struct iscsit_conn *conn) 812{ 813 spin_lock_bh(&conn->conn_usage_lock); 814 conn->conn_usage_count--; 815 816 if (!conn->conn_usage_count && conn->conn_waiting_on_uc) { 817 spin_unlock_bh(&conn->conn_usage_lock); 818 complete(&conn->conn_waiting_on_uc_comp); 819 return; 820 } 821 822 spin_unlock_bh(&conn->conn_usage_lock); 823} 824 825void iscsit_inc_conn_usage_count(struct iscsit_conn *conn) 826{ 827 spin_lock_bh(&conn->conn_usage_lock); 828 conn->conn_usage_count++; 829 spin_unlock_bh(&conn->conn_usage_lock); 830} 831 832static int iscsit_add_nopin(struct iscsit_conn *conn, int want_response) 833{ 834 u8 state; 835 struct iscsit_cmd *cmd; 836 837 cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 838 if (!cmd) 839 return -1; 840 841 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 842 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 843 ISTATE_SEND_NOPIN_NO_RESPONSE; 844 cmd->init_task_tag = RESERVED_ITT; 845 cmd->targ_xfer_tag = (want_response) ? 846 session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 847 spin_lock_bh(&conn->cmd_lock); 848 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 849 spin_unlock_bh(&conn->cmd_lock); 850 851 if (want_response) 852 iscsit_start_nopin_response_timer(conn); 853 iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 854 855 return 0; 856} 857 858void iscsit_handle_nopin_response_timeout(struct timer_list *t) 859{ 860 struct iscsit_conn *conn = timer_container_of(conn, t, 861 nopin_response_timer); 862 struct iscsit_session *sess = conn->sess; 863 864 iscsit_inc_conn_usage_count(conn); 865 866 spin_lock_bh(&conn->nopin_timer_lock); 867 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 868 spin_unlock_bh(&conn->nopin_timer_lock); 869 iscsit_dec_conn_usage_count(conn); 870 return; 871 } 872 873 pr_err("Did not receive response to NOPIN on CID: %hu, failing" 874 " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", 875 conn->cid, sess->sess_ops->InitiatorName, sess->isid, 876 sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); 877 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 878 spin_unlock_bh(&conn->nopin_timer_lock); 879 880 iscsit_fill_cxn_timeout_err_stats(sess); 881 iscsit_cause_connection_reinstatement(conn, 0); 882 iscsit_dec_conn_usage_count(conn); 883} 884 885void iscsit_mod_nopin_response_timer(struct iscsit_conn *conn) 886{ 887 struct iscsit_session *sess = conn->sess; 888 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 889 890 spin_lock_bh(&conn->nopin_timer_lock); 891 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 892 spin_unlock_bh(&conn->nopin_timer_lock); 893 return; 894 } 895 896 mod_timer(&conn->nopin_response_timer, 897 (get_jiffies_64() + na->nopin_response_timeout * HZ)); 898 spin_unlock_bh(&conn->nopin_timer_lock); 899} 900 901void iscsit_start_nopin_response_timer(struct iscsit_conn *conn) 902{ 903 struct iscsit_session *sess = conn->sess; 904 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 905 906 spin_lock_bh(&conn->nopin_timer_lock); 907 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 908 spin_unlock_bh(&conn->nopin_timer_lock); 909 return; 910 } 911 912 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 913 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 914 mod_timer(&conn->nopin_response_timer, 915 jiffies + na->nopin_response_timeout * HZ); 916 917 pr_debug("Started NOPIN Response Timer on CID: %d to %u" 918 " seconds\n", conn->cid, na->nopin_response_timeout); 919 spin_unlock_bh(&conn->nopin_timer_lock); 920} 921 922void iscsit_stop_nopin_response_timer(struct iscsit_conn *conn) 923{ 924 spin_lock_bh(&conn->nopin_timer_lock); 925 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 926 spin_unlock_bh(&conn->nopin_timer_lock); 927 return; 928 } 929 conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 930 spin_unlock_bh(&conn->nopin_timer_lock); 931 932 timer_delete_sync(&conn->nopin_response_timer); 933 934 spin_lock_bh(&conn->nopin_timer_lock); 935 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 936 spin_unlock_bh(&conn->nopin_timer_lock); 937} 938 939void iscsit_handle_nopin_timeout(struct timer_list *t) 940{ 941 struct iscsit_conn *conn = timer_container_of(conn, t, nopin_timer); 942 943 iscsit_inc_conn_usage_count(conn); 944 945 spin_lock_bh(&conn->nopin_timer_lock); 946 if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 947 spin_unlock_bh(&conn->nopin_timer_lock); 948 iscsit_dec_conn_usage_count(conn); 949 return; 950 } 951 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 952 spin_unlock_bh(&conn->nopin_timer_lock); 953 954 iscsit_add_nopin(conn, 1); 955 iscsit_dec_conn_usage_count(conn); 956} 957 958void __iscsit_start_nopin_timer(struct iscsit_conn *conn) 959{ 960 struct iscsit_session *sess = conn->sess; 961 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 962 963 lockdep_assert_held(&conn->nopin_timer_lock); 964 965 /* 966 * NOPIN timeout is disabled. 967 */ 968 if (!na->nopin_timeout) 969 return; 970 971 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 972 return; 973 974 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 975 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 976 mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 977 978 pr_debug("Started NOPIN Timer on CID: %d at %u second" 979 " interval\n", conn->cid, na->nopin_timeout); 980} 981 982void iscsit_start_nopin_timer(struct iscsit_conn *conn) 983{ 984 spin_lock_bh(&conn->nopin_timer_lock); 985 __iscsit_start_nopin_timer(conn); 986 spin_unlock_bh(&conn->nopin_timer_lock); 987} 988 989void iscsit_stop_nopin_timer(struct iscsit_conn *conn) 990{ 991 spin_lock_bh(&conn->nopin_timer_lock); 992 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 993 spin_unlock_bh(&conn->nopin_timer_lock); 994 return; 995 } 996 conn->nopin_timer_flags |= ISCSI_TF_STOP; 997 spin_unlock_bh(&conn->nopin_timer_lock); 998 999 timer_delete_sync(&conn->nopin_timer); 1000 1001 spin_lock_bh(&conn->nopin_timer_lock); 1002 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1003 spin_unlock_bh(&conn->nopin_timer_lock); 1004} 1005 1006void iscsit_login_timeout(struct timer_list *t) 1007{ 1008 struct iscsit_conn *conn = timer_container_of(conn, t, login_timer); 1009 struct iscsi_login *login = conn->login; 1010 1011 pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n"); 1012 1013 spin_lock_bh(&conn->login_timer_lock); 1014 login->login_failed = 1; 1015 1016 if (conn->login_kworker) { 1017 pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n", 1018 conn->login_kworker->comm, conn->login_kworker->pid); 1019 send_sig(SIGINT, conn->login_kworker, 1); 1020 } else { 1021 schedule_delayed_work(&conn->login_work, 0); 1022 } 1023 spin_unlock_bh(&conn->login_timer_lock); 1024} 1025 1026void iscsit_start_login_timer(struct iscsit_conn *conn, struct task_struct *kthr) 1027{ 1028 pr_debug("Login timer started\n"); 1029 1030 conn->login_kworker = kthr; 1031 mod_timer(&conn->login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ); 1032} 1033 1034int iscsit_set_login_timer_kworker(struct iscsit_conn *conn, struct task_struct *kthr) 1035{ 1036 struct iscsi_login *login = conn->login; 1037 int ret = 0; 1038 1039 spin_lock_bh(&conn->login_timer_lock); 1040 if (login->login_failed) { 1041 /* The timer has already expired */ 1042 ret = -1; 1043 } else { 1044 conn->login_kworker = kthr; 1045 } 1046 spin_unlock_bh(&conn->login_timer_lock); 1047 1048 return ret; 1049} 1050 1051void iscsit_stop_login_timer(struct iscsit_conn *conn) 1052{ 1053 pr_debug("Login timer stopped\n"); 1054 timer_delete_sync(&conn->login_timer); 1055} 1056 1057int iscsit_send_tx_data( 1058 struct iscsit_cmd *cmd, 1059 struct iscsit_conn *conn, 1060 int use_misc) 1061{ 1062 int tx_sent, tx_size; 1063 u32 iov_count; 1064 struct kvec *iov; 1065 1066send_data: 1067 tx_size = cmd->tx_size; 1068 1069 if (!use_misc) { 1070 iov = &cmd->iov_data[0]; 1071 iov_count = cmd->iov_data_count; 1072 } else { 1073 iov = &cmd->iov_misc[0]; 1074 iov_count = cmd->iov_misc_count; 1075 } 1076 1077 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1078 if (tx_size != tx_sent) { 1079 if (tx_sent == -EAGAIN) { 1080 pr_err("tx_data() returned -EAGAIN\n"); 1081 goto send_data; 1082 } else 1083 return -1; 1084 } 1085 cmd->tx_size = 0; 1086 1087 return 0; 1088} 1089 1090int iscsit_fe_sendpage_sg( 1091 struct iscsit_cmd *cmd, 1092 struct iscsit_conn *conn) 1093{ 1094 struct scatterlist *sg = cmd->first_data_sg; 1095 struct bio_vec bvec; 1096 struct msghdr msghdr = { .msg_flags = MSG_SPLICE_PAGES, }; 1097 struct kvec iov; 1098 u32 tx_hdr_size, data_len; 1099 u32 offset = cmd->first_data_sg_off; 1100 int tx_sent, iov_off; 1101 1102send_hdr: 1103 tx_hdr_size = ISCSI_HDR_LEN; 1104 if (conn->conn_ops->HeaderDigest) 1105 tx_hdr_size += ISCSI_CRC_LEN; 1106 1107 iov.iov_base = cmd->pdu; 1108 iov.iov_len = tx_hdr_size; 1109 1110 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1111 if (tx_hdr_size != tx_sent) { 1112 if (tx_sent == -EAGAIN) { 1113 pr_err("tx_data() returned -EAGAIN\n"); 1114 goto send_hdr; 1115 } 1116 return -1; 1117 } 1118 1119 data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 1120 /* 1121 * Set iov_off used by padding and data digest tx_data() calls below 1122 * in order to determine proper offset into cmd->iov_data[] 1123 */ 1124 if (conn->conn_ops->DataDigest) { 1125 data_len -= ISCSI_CRC_LEN; 1126 if (cmd->padding) 1127 iov_off = (cmd->iov_data_count - 2); 1128 else 1129 iov_off = (cmd->iov_data_count - 1); 1130 } else { 1131 iov_off = (cmd->iov_data_count - 1); 1132 } 1133 /* 1134 * Perform sendpage() for each page in the scatterlist 1135 */ 1136 while (data_len) { 1137 u32 space = (sg->length - offset); 1138 u32 sub_len = min_t(u32, data_len, space); 1139send_pg: 1140 bvec_set_page(&bvec, sg_page(sg), sub_len, sg->offset + offset); 1141 iov_iter_bvec(&msghdr.msg_iter, ITER_SOURCE, &bvec, 1, sub_len); 1142 1143 tx_sent = conn->sock->ops->sendmsg(conn->sock, &msghdr, 1144 sub_len); 1145 if (tx_sent != sub_len) { 1146 if (tx_sent == -EAGAIN) { 1147 pr_err("sendmsg/splice returned -EAGAIN\n"); 1148 goto send_pg; 1149 } 1150 1151 pr_err("sendmsg/splice failure: %d\n", tx_sent); 1152 return -1; 1153 } 1154 1155 data_len -= sub_len; 1156 offset = 0; 1157 sg = sg_next(sg); 1158 } 1159 1160send_padding: 1161 if (cmd->padding) { 1162 struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1163 1164 tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1165 if (cmd->padding != tx_sent) { 1166 if (tx_sent == -EAGAIN) { 1167 pr_err("tx_data() returned -EAGAIN\n"); 1168 goto send_padding; 1169 } 1170 return -1; 1171 } 1172 } 1173 1174send_datacrc: 1175 if (conn->conn_ops->DataDigest) { 1176 struct kvec *iov_d = &cmd->iov_data[iov_off]; 1177 1178 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1179 if (ISCSI_CRC_LEN != tx_sent) { 1180 if (tx_sent == -EAGAIN) { 1181 pr_err("tx_data() returned -EAGAIN\n"); 1182 goto send_datacrc; 1183 } 1184 return -1; 1185 } 1186 } 1187 1188 return 0; 1189} 1190 1191/* 1192 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1193 * back to the Initiator when an expection condition occurs with the 1194 * errors set in status_class and status_detail. 1195 * 1196 * Parameters: iSCSI Connection, Status Class, Status Detail. 1197 * Returns: 0 on success, -1 on error. 1198 */ 1199int iscsit_tx_login_rsp(struct iscsit_conn *conn, u8 status_class, u8 status_detail) 1200{ 1201 struct iscsi_login_rsp *hdr; 1202 struct iscsi_login *login = conn->conn_login; 1203 1204 login->login_failed = 1; 1205 iscsit_collect_login_stats(conn, status_class, status_detail); 1206 1207 memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 1208 1209 hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1210 hdr->opcode = ISCSI_OP_LOGIN_RSP; 1211 hdr->status_class = status_class; 1212 hdr->status_detail = status_detail; 1213 hdr->itt = conn->login_itt; 1214 1215 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1216} 1217 1218int rx_data( 1219 struct iscsit_conn *conn, 1220 struct kvec *iov, 1221 int iov_count, 1222 int data) 1223{ 1224 int rx_loop = 0, total_rx = 0; 1225 struct msghdr msg; 1226 1227 if (!conn || !conn->sock || !conn->conn_ops) 1228 return -1; 1229 1230 memset(&msg, 0, sizeof(struct msghdr)); 1231 iov_iter_kvec(&msg.msg_iter, ITER_DEST, iov, iov_count, data); 1232 1233 while (msg_data_left(&msg)) { 1234 rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1235 if (rx_loop <= 0) { 1236 pr_debug("rx_loop: %d total_rx: %d\n", 1237 rx_loop, total_rx); 1238 return rx_loop; 1239 } 1240 total_rx += rx_loop; 1241 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1242 rx_loop, total_rx, data); 1243 } 1244 1245 return total_rx; 1246} 1247 1248int tx_data( 1249 struct iscsit_conn *conn, 1250 struct kvec *iov, 1251 int iov_count, 1252 int data) 1253{ 1254 struct msghdr msg; 1255 int total_tx = 0; 1256 1257 if (!conn || !conn->sock || !conn->conn_ops) 1258 return -1; 1259 1260 if (data <= 0) { 1261 pr_err("Data length is: %d\n", data); 1262 return -1; 1263 } 1264 1265 memset(&msg, 0, sizeof(struct msghdr)); 1266 1267 iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, iov, iov_count, data); 1268 1269 while (msg_data_left(&msg)) { 1270 int tx_loop = sock_sendmsg(conn->sock, &msg); 1271 if (tx_loop <= 0) { 1272 pr_debug("tx_loop: %d total_tx %d\n", 1273 tx_loop, total_tx); 1274 return tx_loop; 1275 } 1276 total_tx += tx_loop; 1277 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1278 tx_loop, total_tx, data); 1279 } 1280 1281 return total_tx; 1282} 1283 1284void iscsit_collect_login_stats( 1285 struct iscsit_conn *conn, 1286 u8 status_class, 1287 u8 status_detail) 1288{ 1289 struct iscsi_param *intrname = NULL; 1290 struct iscsi_tiqn *tiqn; 1291 struct iscsi_login_stats *ls; 1292 1293 tiqn = iscsit_snmp_get_tiqn(conn); 1294 if (!tiqn) 1295 return; 1296 1297 ls = &tiqn->login_stats; 1298 1299 spin_lock(&ls->lock); 1300 if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1301 ls->accepts++; 1302 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1303 ls->redirects++; 1304 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1305 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1306 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1307 ls->authenticate_fails++; 1308 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1309 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1310 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1311 ls->authorize_fails++; 1312 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1313 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1314 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1315 ls->negotiate_fails++; 1316 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1317 } else { 1318 ls->other_fails++; 1319 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1320 } 1321 1322 /* Save initiator name, ip address and time, if it is a failed login */ 1323 if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1324 if (conn->param_list) 1325 intrname = iscsi_find_param_from_key(INITIATORNAME, 1326 conn->param_list); 1327 strscpy(ls->last_intr_fail_name, 1328 (intrname ? intrname->value : "Unknown"), 1329 sizeof(ls->last_intr_fail_name)); 1330 1331 ls->last_intr_fail_ip_family = conn->login_family; 1332 1333 ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1334 ls->last_fail_time = get_jiffies_64(); 1335 } 1336 1337 spin_unlock(&ls->lock); 1338} 1339 1340struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsit_conn *conn) 1341{ 1342 struct iscsi_portal_group *tpg; 1343 1344 if (!conn) 1345 return NULL; 1346 1347 tpg = conn->tpg; 1348 if (!tpg) 1349 return NULL; 1350 1351 if (!tpg->tpg_tiqn) 1352 return NULL; 1353 1354 return tpg->tpg_tiqn; 1355} 1356 1357void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess) 1358{ 1359 struct iscsi_portal_group *tpg = sess->tpg; 1360 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 1361 1362 if (!tiqn) 1363 return; 1364 1365 spin_lock_bh(&tiqn->sess_err_stats.lock); 1366 strscpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 1367 sess->sess_ops->InitiatorName, 1368 sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); 1369 tiqn->sess_err_stats.last_sess_failure_type = 1370 ISCSI_SESS_ERR_CXN_TIMEOUT; 1371 tiqn->sess_err_stats.cxn_timeout_errors++; 1372 atomic_long_inc(&sess->conn_timeout_errors); 1373 spin_unlock_bh(&tiqn->sess_err_stats.lock); 1374}
~/
Read-only file preview.