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 void 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; 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 } 594 595 struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 596 { 597 struct iscsi_queue_req *qr; 598 599 spin_lock_bh(&conn->response_queue_lock); 600 if (list_empty(&conn->response_queue_list)) { 601 spin_unlock_bh(&conn->response_queue_lock); 602 return NULL; 603 } 604 605 qr = list_first_entry(&conn->response_queue_list, 606 struct iscsi_queue_req, qr_list); 607 608 list_del(&qr->qr_list); 609 if (qr->cmd) 610 atomic_dec(&qr->cmd->response_queue_count); 611 spin_unlock_bh(&conn->response_queue_lock); 612 613 return qr; 614 } 615 616 static void iscsit_remove_cmd_from_response_queue( 617 struct iscsi_cmd *cmd, 618 struct iscsi_conn *conn) 619 { 620 struct iscsi_queue_req *qr, *qr_tmp; 621 622 spin_lock_bh(&conn->response_queue_lock); 623 if (!atomic_read(&cmd->response_queue_count)) { 624 spin_unlock_bh(&conn->response_queue_lock); 625 return; 626 } 627 628 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 629 qr_list) { 630 if (qr->cmd != cmd) 631 continue; 632 633 atomic_dec(&qr->cmd->response_queue_count); 634 list_del(&qr->qr_list); 635 kmem_cache_free(lio_qr_cache, qr); 636 } 637 spin_unlock_bh(&conn->response_queue_lock); 638 639 if (atomic_read(&cmd->response_queue_count)) { 640 pr_err("ITT: 0x%08x response_queue_count: %d\n", 641 cmd->init_task_tag, 642 atomic_read(&cmd->response_queue_count)); 643 } 644 } 645 646 bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 647 { 648 bool empty; 649 650 spin_lock_bh(&conn->immed_queue_lock); 651 empty = list_empty(&conn->immed_queue_list); 652 spin_unlock_bh(&conn->immed_queue_lock); 653 654 if (!empty) 655 return empty; 656 657 spin_lock_bh(&conn->response_queue_lock); 658 empty = list_empty(&conn->response_queue_list); 659 spin_unlock_bh(&conn->response_queue_lock); 660 661 return empty; 662 } 663 664 void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 665 { 666 struct iscsi_queue_req *qr, *qr_tmp; 667 668 spin_lock_bh(&conn->immed_queue_lock); 669 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 670 list_del(&qr->qr_list); 671 if (qr->cmd) 672 atomic_dec(&qr->cmd->immed_queue_count); 673 674 kmem_cache_free(lio_qr_cache, qr); 675 } 676 spin_unlock_bh(&conn->immed_queue_lock); 677 678 spin_lock_bh(&conn->response_queue_lock); 679 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 680 qr_list) { 681 list_del(&qr->qr_list); 682 if (qr->cmd) 683 atomic_dec(&qr->cmd->response_queue_count); 684 685 kmem_cache_free(lio_qr_cache, qr); 686 } 687 spin_unlock_bh(&conn->response_queue_lock); 688 } 689 690 void iscsit_release_cmd(struct iscsi_cmd *cmd) 691 { 692 struct iscsi_session *sess; 693 struct se_cmd *se_cmd = &cmd->se_cmd; 694 695 if (cmd->conn) 696 sess = cmd->conn->sess; 697 else 698 sess = cmd->sess; 699 700 BUG_ON(!sess || !sess->se_sess); 701 702 kfree(cmd->buf_ptr); 703 kfree(cmd->pdu_list); 704 kfree(cmd->seq_list); 705 kfree(cmd->tmr_req); 706 kfree(cmd->iov_data); 707 kfree(cmd->text_in_ptr); 708 709 percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 710 } 711 EXPORT_SYMBOL(iscsit_release_cmd); 712 713 void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 714 bool check_queues) 715 { 716 struct iscsi_conn *conn = cmd->conn; 717 718 if (scsi_cmd) { 719 if (cmd->data_direction == DMA_TO_DEVICE) { 720 iscsit_stop_dataout_timer(cmd); 721 iscsit_free_r2ts_from_list(cmd); 722 } 723 if (cmd->data_direction == DMA_FROM_DEVICE) 724 iscsit_free_all_datain_reqs(cmd); 725 } 726 727 if (conn && check_queues) { 728 iscsit_remove_cmd_from_immediate_queue(cmd, conn); 729 iscsit_remove_cmd_from_response_queue(cmd, conn); 730 } 731 732 if (conn && conn->conn_transport->iscsit_release_cmd) 733 conn->conn_transport->iscsit_release_cmd(conn, cmd); 734 } 735 736 void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 737 { 738 struct se_cmd *se_cmd = NULL; 739 int rc; 740 /* 741 * Determine if a struct se_cmd is associated with 742 * this struct iscsi_cmd. 743 */ 744 switch (cmd->iscsi_opcode) { 745 case ISCSI_OP_SCSI_CMD: 746 se_cmd = &cmd->se_cmd; 747 __iscsit_free_cmd(cmd, true, shutdown); 748 /* 749 * Fallthrough 750 */ 751 case ISCSI_OP_SCSI_TMFUNC: 752 rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 753 if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 754 __iscsit_free_cmd(cmd, true, shutdown); 755 target_put_sess_cmd(se_cmd); 756 } 757 break; 758 case ISCSI_OP_REJECT: 759 /* 760 * Handle special case for REJECT when iscsi_add_reject*() has 761 * overwritten the original iscsi_opcode assignment, and the 762 * associated cmd->se_cmd needs to be released. 763 */ 764 if (cmd->se_cmd.se_tfo != NULL) { 765 se_cmd = &cmd->se_cmd; 766 __iscsit_free_cmd(cmd, true, shutdown); 767 768 rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 769 if (!rc && shutdown && se_cmd->se_sess) { 770 __iscsit_free_cmd(cmd, true, shutdown); 771 target_put_sess_cmd(se_cmd); 772 } 773 break; 774 } 775 /* Fall-through */ 776 default: 777 __iscsit_free_cmd(cmd, false, shutdown); 778 iscsit_release_cmd(cmd); 779 break; 780 } 781 } 782 EXPORT_SYMBOL(iscsit_free_cmd); 783 784 int iscsit_check_session_usage_count(struct iscsi_session *sess) 785 { 786 spin_lock_bh(&sess->session_usage_lock); 787 if (sess->session_usage_count != 0) { 788 sess->session_waiting_on_uc = 1; 789 spin_unlock_bh(&sess->session_usage_lock); 790 if (in_interrupt()) 791 return 2; 792 793 wait_for_completion(&sess->session_waiting_on_uc_comp); 794 return 1; 795 } 796 spin_unlock_bh(&sess->session_usage_lock); 797 798 return 0; 799 } 800 801 void iscsit_dec_session_usage_count(struct iscsi_session *sess) 802 { 803 spin_lock_bh(&sess->session_usage_lock); 804 sess->session_usage_count--; 805 806 if (!sess->session_usage_count && sess->session_waiting_on_uc) 807 complete(&sess->session_waiting_on_uc_comp); 808 809 spin_unlock_bh(&sess->session_usage_lock); 810 } 811 812 void iscsit_inc_session_usage_count(struct iscsi_session *sess) 813 { 814 spin_lock_bh(&sess->session_usage_lock); 815 sess->session_usage_count++; 816 spin_unlock_bh(&sess->session_usage_lock); 817 } 818 819 struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 820 { 821 struct iscsi_conn *conn; 822 823 spin_lock_bh(&sess->conn_lock); 824 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 825 if ((conn->cid == cid) && 826 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 827 iscsit_inc_conn_usage_count(conn); 828 spin_unlock_bh(&sess->conn_lock); 829 return conn; 830 } 831 } 832 spin_unlock_bh(&sess->conn_lock); 833 834 return NULL; 835 } 836 837 struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 838 { 839 struct iscsi_conn *conn; 840 841 spin_lock_bh(&sess->conn_lock); 842 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 843 if (conn->cid == cid) { 844 iscsit_inc_conn_usage_count(conn); 845 spin_lock(&conn->state_lock); 846 atomic_set(&conn->connection_wait_rcfr, 1); 847 spin_unlock(&conn->state_lock); 848 spin_unlock_bh(&sess->conn_lock); 849 return conn; 850 } 851 } 852 spin_unlock_bh(&sess->conn_lock); 853 854 return NULL; 855 } 856 857 void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 858 { 859 spin_lock_bh(&conn->conn_usage_lock); 860 if (conn->conn_usage_count != 0) { 861 conn->conn_waiting_on_uc = 1; 862 spin_unlock_bh(&conn->conn_usage_lock); 863 864 wait_for_completion(&conn->conn_waiting_on_uc_comp); 865 return; 866 } 867 spin_unlock_bh(&conn->conn_usage_lock); 868 } 869 870 void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 871 { 872 spin_lock_bh(&conn->conn_usage_lock); 873 conn->conn_usage_count--; 874 875 if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 876 complete(&conn->conn_waiting_on_uc_comp); 877 878 spin_unlock_bh(&conn->conn_usage_lock); 879 } 880 881 void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 882 { 883 spin_lock_bh(&conn->conn_usage_lock); 884 conn->conn_usage_count++; 885 spin_unlock_bh(&conn->conn_usage_lock); 886 } 887 888 static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 889 { 890 u8 state; 891 struct iscsi_cmd *cmd; 892 893 cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 894 if (!cmd) 895 return -1; 896 897 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 898 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 899 ISTATE_SEND_NOPIN_NO_RESPONSE; 900 cmd->init_task_tag = RESERVED_ITT; 901 cmd->targ_xfer_tag = (want_response) ? 902 session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 903 spin_lock_bh(&conn->cmd_lock); 904 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 905 spin_unlock_bh(&conn->cmd_lock); 906 907 if (want_response) 908 iscsit_start_nopin_response_timer(conn); 909 iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 910 911 return 0; 912 } 913 914 static void iscsit_handle_nopin_response_timeout(unsigned long data) 915 { 916 struct iscsi_conn *conn = (struct iscsi_conn *) data; 917 918 iscsit_inc_conn_usage_count(conn); 919 920 spin_lock_bh(&conn->nopin_timer_lock); 921 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 922 spin_unlock_bh(&conn->nopin_timer_lock); 923 iscsit_dec_conn_usage_count(conn); 924 return; 925 } 926 927 pr_debug("Did not receive response to NOPIN on CID: %hu on" 928 " SID: %u, failing connection.\n", conn->cid, 929 conn->sess->sid); 930 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 931 spin_unlock_bh(&conn->nopin_timer_lock); 932 933 { 934 struct iscsi_portal_group *tpg = conn->sess->tpg; 935 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 936 937 if (tiqn) { 938 spin_lock_bh(&tiqn->sess_err_stats.lock); 939 strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 940 conn->sess->sess_ops->InitiatorName); 941 tiqn->sess_err_stats.last_sess_failure_type = 942 ISCSI_SESS_ERR_CXN_TIMEOUT; 943 tiqn->sess_err_stats.cxn_timeout_errors++; 944 atomic_long_inc(&conn->sess->conn_timeout_errors); 945 spin_unlock_bh(&tiqn->sess_err_stats.lock); 946 } 947 } 948 949 iscsit_cause_connection_reinstatement(conn, 0); 950 iscsit_dec_conn_usage_count(conn); 951 } 952 953 void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 954 { 955 struct iscsi_session *sess = conn->sess; 956 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 957 958 spin_lock_bh(&conn->nopin_timer_lock); 959 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 960 spin_unlock_bh(&conn->nopin_timer_lock); 961 return; 962 } 963 964 mod_timer(&conn->nopin_response_timer, 965 (get_jiffies_64() + na->nopin_response_timeout * HZ)); 966 spin_unlock_bh(&conn->nopin_timer_lock); 967 } 968 969 /* 970 * Called with conn->nopin_timer_lock held. 971 */ 972 void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 973 { 974 struct iscsi_session *sess = conn->sess; 975 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 976 977 spin_lock_bh(&conn->nopin_timer_lock); 978 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 979 spin_unlock_bh(&conn->nopin_timer_lock); 980 return; 981 } 982 983 init_timer(&conn->nopin_response_timer); 984 conn->nopin_response_timer.expires = 985 (get_jiffies_64() + na->nopin_response_timeout * HZ); 986 conn->nopin_response_timer.data = (unsigned long)conn; 987 conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 988 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 989 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 990 add_timer(&conn->nopin_response_timer); 991 992 pr_debug("Started NOPIN Response Timer on CID: %d to %u" 993 " seconds\n", conn->cid, na->nopin_response_timeout); 994 spin_unlock_bh(&conn->nopin_timer_lock); 995 } 996 997 void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 998 { 999 spin_lock_bh(&conn->nopin_timer_lock); 1000 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1001 spin_unlock_bh(&conn->nopin_timer_lock); 1002 return; 1003 } 1004 conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1005 spin_unlock_bh(&conn->nopin_timer_lock); 1006 1007 del_timer_sync(&conn->nopin_response_timer); 1008 1009 spin_lock_bh(&conn->nopin_timer_lock); 1010 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1011 spin_unlock_bh(&conn->nopin_timer_lock); 1012 } 1013 1014 static void iscsit_handle_nopin_timeout(unsigned long data) 1015 { 1016 struct iscsi_conn *conn = (struct iscsi_conn *) data; 1017 1018 iscsit_inc_conn_usage_count(conn); 1019 1020 spin_lock_bh(&conn->nopin_timer_lock); 1021 if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1022 spin_unlock_bh(&conn->nopin_timer_lock); 1023 iscsit_dec_conn_usage_count(conn); 1024 return; 1025 } 1026 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1027 spin_unlock_bh(&conn->nopin_timer_lock); 1028 1029 iscsit_add_nopin(conn, 1); 1030 iscsit_dec_conn_usage_count(conn); 1031 } 1032 1033 /* 1034 * Called with conn->nopin_timer_lock held. 1035 */ 1036 void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1037 { 1038 struct iscsi_session *sess = conn->sess; 1039 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1040 /* 1041 * NOPIN timeout is disabled. 1042 */ 1043 if (!na->nopin_timeout) 1044 return; 1045 1046 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1047 return; 1048 1049 init_timer(&conn->nopin_timer); 1050 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1051 conn->nopin_timer.data = (unsigned long)conn; 1052 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1053 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1054 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1055 add_timer(&conn->nopin_timer); 1056 1057 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1058 " interval\n", conn->cid, na->nopin_timeout); 1059 } 1060 1061 void 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 spin_lock_bh(&conn->nopin_timer_lock); 1072 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1073 spin_unlock_bh(&conn->nopin_timer_lock); 1074 return; 1075 } 1076 1077 init_timer(&conn->nopin_timer); 1078 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1079 conn->nopin_timer.data = (unsigned long)conn; 1080 conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1081 conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1082 conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1083 add_timer(&conn->nopin_timer); 1084 1085 pr_debug("Started NOPIN Timer on CID: %d at %u second" 1086 " interval\n", conn->cid, na->nopin_timeout); 1087 spin_unlock_bh(&conn->nopin_timer_lock); 1088 } 1089 1090 void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1091 { 1092 spin_lock_bh(&conn->nopin_timer_lock); 1093 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1094 spin_unlock_bh(&conn->nopin_timer_lock); 1095 return; 1096 } 1097 conn->nopin_timer_flags |= ISCSI_TF_STOP; 1098 spin_unlock_bh(&conn->nopin_timer_lock); 1099 1100 del_timer_sync(&conn->nopin_timer); 1101 1102 spin_lock_bh(&conn->nopin_timer_lock); 1103 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1104 spin_unlock_bh(&conn->nopin_timer_lock); 1105 } 1106 1107 int iscsit_send_tx_data( 1108 struct iscsi_cmd *cmd, 1109 struct iscsi_conn *conn, 1110 int use_misc) 1111 { 1112 int tx_sent, tx_size; 1113 u32 iov_count; 1114 struct kvec *iov; 1115 1116 send_data: 1117 tx_size = cmd->tx_size; 1118 1119 if (!use_misc) { 1120 iov = &cmd->iov_data[0]; 1121 iov_count = cmd->iov_data_count; 1122 } else { 1123 iov = &cmd->iov_misc[0]; 1124 iov_count = cmd->iov_misc_count; 1125 } 1126 1127 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1128 if (tx_size != tx_sent) { 1129 if (tx_sent == -EAGAIN) { 1130 pr_err("tx_data() returned -EAGAIN\n"); 1131 goto send_data; 1132 } else 1133 return -1; 1134 } 1135 cmd->tx_size = 0; 1136 1137 return 0; 1138 } 1139 1140 int iscsit_fe_sendpage_sg( 1141 struct iscsi_cmd *cmd, 1142 struct iscsi_conn *conn) 1143 { 1144 struct scatterlist *sg = cmd->first_data_sg; 1145 struct kvec iov; 1146 u32 tx_hdr_size, data_len; 1147 u32 offset = cmd->first_data_sg_off; 1148 int tx_sent, iov_off; 1149 1150 send_hdr: 1151 tx_hdr_size = ISCSI_HDR_LEN; 1152 if (conn->conn_ops->HeaderDigest) 1153 tx_hdr_size += ISCSI_CRC_LEN; 1154 1155 iov.iov_base = cmd->pdu; 1156 iov.iov_len = tx_hdr_size; 1157 1158 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1159 if (tx_hdr_size != tx_sent) { 1160 if (tx_sent == -EAGAIN) { 1161 pr_err("tx_data() returned -EAGAIN\n"); 1162 goto send_hdr; 1163 } 1164 return -1; 1165 } 1166 1167 data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 1168 /* 1169 * Set iov_off used by padding and data digest tx_data() calls below 1170 * in order to determine proper offset into cmd->iov_data[] 1171 */ 1172 if (conn->conn_ops->DataDigest) { 1173 data_len -= ISCSI_CRC_LEN; 1174 if (cmd->padding) 1175 iov_off = (cmd->iov_data_count - 2); 1176 else 1177 iov_off = (cmd->iov_data_count - 1); 1178 } else { 1179 iov_off = (cmd->iov_data_count - 1); 1180 } 1181 /* 1182 * Perform sendpage() for each page in the scatterlist 1183 */ 1184 while (data_len) { 1185 u32 space = (sg->length - offset); 1186 u32 sub_len = min_t(u32, data_len, space); 1187 send_pg: 1188 tx_sent = conn->sock->ops->sendpage(conn->sock, 1189 sg_page(sg), sg->offset + offset, sub_len, 0); 1190 if (tx_sent != sub_len) { 1191 if (tx_sent == -EAGAIN) { 1192 pr_err("tcp_sendpage() returned" 1193 " -EAGAIN\n"); 1194 goto send_pg; 1195 } 1196 1197 pr_err("tcp_sendpage() failure: %d\n", 1198 tx_sent); 1199 return -1; 1200 } 1201 1202 data_len -= sub_len; 1203 offset = 0; 1204 sg = sg_next(sg); 1205 } 1206 1207 send_padding: 1208 if (cmd->padding) { 1209 struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1210 1211 tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1212 if (cmd->padding != tx_sent) { 1213 if (tx_sent == -EAGAIN) { 1214 pr_err("tx_data() returned -EAGAIN\n"); 1215 goto send_padding; 1216 } 1217 return -1; 1218 } 1219 } 1220 1221 send_datacrc: 1222 if (conn->conn_ops->DataDigest) { 1223 struct kvec *iov_d = &cmd->iov_data[iov_off]; 1224 1225 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1226 if (ISCSI_CRC_LEN != tx_sent) { 1227 if (tx_sent == -EAGAIN) { 1228 pr_err("tx_data() returned -EAGAIN\n"); 1229 goto send_datacrc; 1230 } 1231 return -1; 1232 } 1233 } 1234 1235 return 0; 1236 } 1237 1238 /* 1239 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1240 * back to the Initiator when an expection condition occurs with the 1241 * errors set in status_class and status_detail. 1242 * 1243 * Parameters: iSCSI Connection, Status Class, Status Detail. 1244 * Returns: 0 on success, -1 on error. 1245 */ 1246 int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1247 { 1248 struct iscsi_login_rsp *hdr; 1249 struct iscsi_login *login = conn->conn_login; 1250 1251 login->login_failed = 1; 1252 iscsit_collect_login_stats(conn, status_class, status_detail); 1253 1254 memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 1255 1256 hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1257 hdr->opcode = ISCSI_OP_LOGIN_RSP; 1258 hdr->status_class = status_class; 1259 hdr->status_detail = status_detail; 1260 hdr->itt = conn->login_itt; 1261 1262 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1263 } 1264 1265 void iscsit_print_session_params(struct iscsi_session *sess) 1266 { 1267 struct iscsi_conn *conn; 1268 1269 pr_debug("-----------------------------[Session Params for" 1270 " SID: %u]-----------------------------\n", sess->sid); 1271 spin_lock_bh(&sess->conn_lock); 1272 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1273 iscsi_dump_conn_ops(conn->conn_ops); 1274 spin_unlock_bh(&sess->conn_lock); 1275 1276 iscsi_dump_sess_ops(sess->sess_ops); 1277 } 1278 1279 static int iscsit_do_rx_data( 1280 struct iscsi_conn *conn, 1281 struct iscsi_data_count *count) 1282 { 1283 int data = count->data_length, rx_loop = 0, total_rx = 0; 1284 struct msghdr msg; 1285 1286 if (!conn || !conn->sock || !conn->conn_ops) 1287 return -1; 1288 1289 memset(&msg, 0, sizeof(struct msghdr)); 1290 iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1291 count->iov, count->iov_count, data); 1292 1293 while (msg_data_left(&msg)) { 1294 rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1295 if (rx_loop <= 0) { 1296 pr_debug("rx_loop: %d total_rx: %d\n", 1297 rx_loop, total_rx); 1298 return rx_loop; 1299 } 1300 total_rx += rx_loop; 1301 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1302 rx_loop, total_rx, data); 1303 } 1304 1305 return total_rx; 1306 } 1307 1308 int rx_data( 1309 struct iscsi_conn *conn, 1310 struct kvec *iov, 1311 int iov_count, 1312 int data) 1313 { 1314 struct iscsi_data_count c; 1315 1316 if (!conn || !conn->sock || !conn->conn_ops) 1317 return -1; 1318 1319 memset(&c, 0, sizeof(struct iscsi_data_count)); 1320 c.iov = iov; 1321 c.iov_count = iov_count; 1322 c.data_length = data; 1323 c.type = ISCSI_RX_DATA; 1324 1325 return iscsit_do_rx_data(conn, &c); 1326 } 1327 1328 int tx_data( 1329 struct iscsi_conn *conn, 1330 struct kvec *iov, 1331 int iov_count, 1332 int data) 1333 { 1334 struct msghdr msg; 1335 int total_tx = 0; 1336 1337 if (!conn || !conn->sock || !conn->conn_ops) 1338 return -1; 1339 1340 if (data <= 0) { 1341 pr_err("Data length is: %d\n", data); 1342 return -1; 1343 } 1344 1345 memset(&msg, 0, sizeof(struct msghdr)); 1346 1347 iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 1348 iov, iov_count, data); 1349 1350 while (msg_data_left(&msg)) { 1351 int tx_loop = sock_sendmsg(conn->sock, &msg); 1352 if (tx_loop <= 0) { 1353 pr_debug("tx_loop: %d total_tx %d\n", 1354 tx_loop, total_tx); 1355 return tx_loop; 1356 } 1357 total_tx += tx_loop; 1358 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1359 tx_loop, total_tx, data); 1360 } 1361 1362 return total_tx; 1363 } 1364 1365 void iscsit_collect_login_stats( 1366 struct iscsi_conn *conn, 1367 u8 status_class, 1368 u8 status_detail) 1369 { 1370 struct iscsi_param *intrname = NULL; 1371 struct iscsi_tiqn *tiqn; 1372 struct iscsi_login_stats *ls; 1373 1374 tiqn = iscsit_snmp_get_tiqn(conn); 1375 if (!tiqn) 1376 return; 1377 1378 ls = &tiqn->login_stats; 1379 1380 spin_lock(&ls->lock); 1381 if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1382 ls->accepts++; 1383 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1384 ls->redirects++; 1385 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1386 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1387 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1388 ls->authenticate_fails++; 1389 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1390 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1391 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1392 ls->authorize_fails++; 1393 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1394 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1395 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1396 ls->negotiate_fails++; 1397 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1398 } else { 1399 ls->other_fails++; 1400 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1401 } 1402 1403 /* Save initiator name, ip address and time, if it is a failed login */ 1404 if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1405 if (conn->param_list) 1406 intrname = iscsi_find_param_from_key(INITIATORNAME, 1407 conn->param_list); 1408 strlcpy(ls->last_intr_fail_name, 1409 (intrname ? intrname->value : "Unknown"), 1410 sizeof(ls->last_intr_fail_name)); 1411 1412 ls->last_intr_fail_ip_family = conn->login_family; 1413 1414 ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1415 ls->last_fail_time = get_jiffies_64(); 1416 } 1417 1418 spin_unlock(&ls->lock); 1419 } 1420 1421 struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1422 { 1423 struct iscsi_portal_group *tpg; 1424 1425 if (!conn) 1426 return NULL; 1427 1428 tpg = conn->tpg; 1429 if (!tpg) 1430 return NULL; 1431 1432 if (!tpg->tpg_tiqn) 1433 return NULL; 1434 1435 return tpg->tpg_tiqn; 1436 } 1437