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1// SPDX-License-Identifier: GPL-2.0-or-later2/*******************************************************************************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 allocating153 * 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 against248 * ExpCmdSN and MaxCmdSN values, as well as accounting for out249 * or order CmdSNs due to multiple connection sessions and/or250 * 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 silently321 * ignore commands with CMDSN_LOWER_THAN_EXP, so force this322 * 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 336int iscsit_check_unsolicited_dataout(struct iscsit_cmd *cmd, unsigned char *buf)337{338 struct iscsit_conn *conn = cmd->conn;339 struct se_cmd *se_cmd = &cmd->se_cmd;340 struct iscsi_data *hdr = (struct iscsi_data *) buf;341 u32 payload_length = ntoh24(hdr->dlength);342 343 if (conn->sess->sess_ops->InitialR2T) {344 pr_err("Received unexpected unsolicited data"345 " while InitialR2T=Yes, protocol error.\n");346 transport_send_check_condition_and_sense(se_cmd,347 TCM_UNEXPECTED_UNSOLICITED_DATA, 0);348 return -1;349 }350 351 if ((cmd->first_burst_len + payload_length) >352 conn->sess->sess_ops->FirstBurstLength) {353 pr_err("Total %u bytes exceeds FirstBurstLength: %u"354 " for this Unsolicited DataOut Burst.\n",355 (cmd->first_burst_len + payload_length),356 conn->sess->sess_ops->FirstBurstLength);357 transport_send_check_condition_and_sense(se_cmd,358 TCM_INCORRECT_AMOUNT_OF_DATA, 0);359 return -1;360 }361 362 if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))363 return 0;364 365 if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) &&366 ((cmd->first_burst_len + payload_length) !=367 conn->sess->sess_ops->FirstBurstLength)) {368 pr_err("Unsolicited non-immediate data received %u"369 " does not equal FirstBurstLength: %u, and does"370 " not equal ExpXferLen %u.\n",371 (cmd->first_burst_len + payload_length),372 conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length);373 transport_send_check_condition_and_sense(se_cmd,374 TCM_INCORRECT_AMOUNT_OF_DATA, 0);375 return -1;376 }377 return 0;378}379 380struct iscsit_cmd *iscsit_find_cmd_from_itt(381 struct iscsit_conn *conn,382 itt_t init_task_tag)383{384 struct iscsit_cmd *cmd;385 386 spin_lock_bh(&conn->cmd_lock);387 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {388 if (cmd->init_task_tag == init_task_tag) {389 spin_unlock_bh(&conn->cmd_lock);390 return cmd;391 }392 }393 spin_unlock_bh(&conn->cmd_lock);394 395 pr_err("Unable to locate ITT: 0x%08x on CID: %hu",396 init_task_tag, conn->cid);397 return NULL;398}399EXPORT_SYMBOL(iscsit_find_cmd_from_itt);400 401struct iscsit_cmd *iscsit_find_cmd_from_itt_or_dump(402 struct iscsit_conn *conn,403 itt_t init_task_tag,404 u32 length)405{406 struct iscsit_cmd *cmd;407 408 spin_lock_bh(&conn->cmd_lock);409 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {410 if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT)411 continue;412 if (cmd->init_task_tag == init_task_tag) {413 spin_unlock_bh(&conn->cmd_lock);414 return cmd;415 }416 }417 spin_unlock_bh(&conn->cmd_lock);418 419 pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"420 " dumping payload\n", init_task_tag, conn->cid);421 if (length)422 iscsit_dump_data_payload(conn, length, 1);423 424 return NULL;425}426EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump);427 428struct iscsit_cmd *iscsit_find_cmd_from_ttt(429 struct iscsit_conn *conn,430 u32 targ_xfer_tag)431{432 struct iscsit_cmd *cmd = NULL;433 434 spin_lock_bh(&conn->cmd_lock);435 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {436 if (cmd->targ_xfer_tag == targ_xfer_tag) {437 spin_unlock_bh(&conn->cmd_lock);438 return cmd;439 }440 }441 spin_unlock_bh(&conn->cmd_lock);442 443 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",444 targ_xfer_tag, conn->cid);445 return NULL;446}447 448int iscsit_find_cmd_for_recovery(449 struct iscsit_session *sess,450 struct iscsit_cmd **cmd_ptr,451 struct iscsi_conn_recovery **cr_ptr,452 itt_t init_task_tag)453{454 struct iscsit_cmd *cmd = NULL;455 struct iscsi_conn_recovery *cr;456 /*457 * Scan through the inactive connection recovery list's command list.458 * If init_task_tag matches the command is still alligent.459 */460 spin_lock(&sess->cr_i_lock);461 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {462 spin_lock(&cr->conn_recovery_cmd_lock);463 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {464 if (cmd->init_task_tag == init_task_tag) {465 spin_unlock(&cr->conn_recovery_cmd_lock);466 spin_unlock(&sess->cr_i_lock);467 468 *cr_ptr = cr;469 *cmd_ptr = cmd;470 return -2;471 }472 }473 spin_unlock(&cr->conn_recovery_cmd_lock);474 }475 spin_unlock(&sess->cr_i_lock);476 /*477 * Scan through the active connection recovery list's command list.478 * If init_task_tag matches the command is ready to be reassigned.479 */480 spin_lock(&sess->cr_a_lock);481 list_for_each_entry(cr, &sess->cr_active_list, cr_list) {482 spin_lock(&cr->conn_recovery_cmd_lock);483 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {484 if (cmd->init_task_tag == init_task_tag) {485 spin_unlock(&cr->conn_recovery_cmd_lock);486 spin_unlock(&sess->cr_a_lock);487 488 *cr_ptr = cr;489 *cmd_ptr = cmd;490 return 0;491 }492 }493 spin_unlock(&cr->conn_recovery_cmd_lock);494 }495 spin_unlock(&sess->cr_a_lock);496 497 return -1;498}499 500void iscsit_add_cmd_to_immediate_queue(501 struct iscsit_cmd *cmd,502 struct iscsit_conn *conn,503 u8 state)504{505 struct iscsi_queue_req *qr;506 507 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);508 if (!qr) {509 pr_err("Unable to allocate memory for"510 " struct iscsi_queue_req\n");511 return;512 }513 INIT_LIST_HEAD(&qr->qr_list);514 qr->cmd = cmd;515 qr->state = state;516 517 spin_lock_bh(&conn->immed_queue_lock);518 list_add_tail(&qr->qr_list, &conn->immed_queue_list);519 atomic_inc(&cmd->immed_queue_count);520 atomic_set(&conn->check_immediate_queue, 1);521 spin_unlock_bh(&conn->immed_queue_lock);522 523 wake_up(&conn->queues_wq);524}525EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue);526 527struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsit_conn *conn)528{529 struct iscsi_queue_req *qr;530 531 spin_lock_bh(&conn->immed_queue_lock);532 if (list_empty(&conn->immed_queue_list)) {533 spin_unlock_bh(&conn->immed_queue_lock);534 return NULL;535 }536 qr = list_first_entry(&conn->immed_queue_list,537 struct iscsi_queue_req, qr_list);538 539 list_del(&qr->qr_list);540 if (qr->cmd)541 atomic_dec(&qr->cmd->immed_queue_count);542 spin_unlock_bh(&conn->immed_queue_lock);543 544 return qr;545}546 547static void iscsit_remove_cmd_from_immediate_queue(548 struct iscsit_cmd *cmd,549 struct iscsit_conn *conn)550{551 struct iscsi_queue_req *qr, *qr_tmp;552 553 spin_lock_bh(&conn->immed_queue_lock);554 if (!atomic_read(&cmd->immed_queue_count)) {555 spin_unlock_bh(&conn->immed_queue_lock);556 return;557 }558 559 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {560 if (qr->cmd != cmd)561 continue;562 563 atomic_dec(&qr->cmd->immed_queue_count);564 list_del(&qr->qr_list);565 kmem_cache_free(lio_qr_cache, qr);566 }567 spin_unlock_bh(&conn->immed_queue_lock);568 569 if (atomic_read(&cmd->immed_queue_count)) {570 pr_err("ITT: 0x%08x immed_queue_count: %d\n",571 cmd->init_task_tag,572 atomic_read(&cmd->immed_queue_count));573 }574}575 576int iscsit_add_cmd_to_response_queue(577 struct iscsit_cmd *cmd,578 struct iscsit_conn *conn,579 u8 state)580{581 struct iscsi_queue_req *qr;582 583 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);584 if (!qr) {585 pr_err("Unable to allocate memory for"586 " struct iscsi_queue_req\n");587 return -ENOMEM;588 }589 INIT_LIST_HEAD(&qr->qr_list);590 qr->cmd = cmd;591 qr->state = state;592 593 spin_lock_bh(&conn->response_queue_lock);594 list_add_tail(&qr->qr_list, &conn->response_queue_list);595 atomic_inc(&cmd->response_queue_count);596 spin_unlock_bh(&conn->response_queue_lock);597 598 wake_up(&conn->queues_wq);599 return 0;600}601 602struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsit_conn *conn)603{604 struct iscsi_queue_req *qr;605 606 spin_lock_bh(&conn->response_queue_lock);607 if (list_empty(&conn->response_queue_list)) {608 spin_unlock_bh(&conn->response_queue_lock);609 return NULL;610 }611 612 qr = list_first_entry(&conn->response_queue_list,613 struct iscsi_queue_req, qr_list);614 615 list_del(&qr->qr_list);616 if (qr->cmd)617 atomic_dec(&qr->cmd->response_queue_count);618 spin_unlock_bh(&conn->response_queue_lock);619 620 return qr;621}622 623static void iscsit_remove_cmd_from_response_queue(624 struct iscsit_cmd *cmd,625 struct iscsit_conn *conn)626{627 struct iscsi_queue_req *qr, *qr_tmp;628 629 spin_lock_bh(&conn->response_queue_lock);630 if (!atomic_read(&cmd->response_queue_count)) {631 spin_unlock_bh(&conn->response_queue_lock);632 return;633 }634 635 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,636 qr_list) {637 if (qr->cmd != cmd)638 continue;639 640 atomic_dec(&qr->cmd->response_queue_count);641 list_del(&qr->qr_list);642 kmem_cache_free(lio_qr_cache, qr);643 }644 spin_unlock_bh(&conn->response_queue_lock);645 646 if (atomic_read(&cmd->response_queue_count)) {647 pr_err("ITT: 0x%08x response_queue_count: %d\n",648 cmd->init_task_tag,649 atomic_read(&cmd->response_queue_count));650 }651}652 653bool iscsit_conn_all_queues_empty(struct iscsit_conn *conn)654{655 bool empty;656 657 spin_lock_bh(&conn->immed_queue_lock);658 empty = list_empty(&conn->immed_queue_list);659 spin_unlock_bh(&conn->immed_queue_lock);660 661 if (!empty)662 return empty;663 664 spin_lock_bh(&conn->response_queue_lock);665 empty = list_empty(&conn->response_queue_list);666 spin_unlock_bh(&conn->response_queue_lock);667 668 return empty;669}670 671void iscsit_free_queue_reqs_for_conn(struct iscsit_conn *conn)672{673 struct iscsi_queue_req *qr, *qr_tmp;674 675 spin_lock_bh(&conn->immed_queue_lock);676 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {677 list_del(&qr->qr_list);678 if (qr->cmd)679 atomic_dec(&qr->cmd->immed_queue_count);680 681 kmem_cache_free(lio_qr_cache, qr);682 }683 spin_unlock_bh(&conn->immed_queue_lock);684 685 spin_lock_bh(&conn->response_queue_lock);686 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,687 qr_list) {688 list_del(&qr->qr_list);689 if (qr->cmd)690 atomic_dec(&qr->cmd->response_queue_count);691 692 kmem_cache_free(lio_qr_cache, qr);693 }694 spin_unlock_bh(&conn->response_queue_lock);695}696 697void iscsit_release_cmd(struct iscsit_cmd *cmd)698{699 struct iscsit_session *sess;700 struct se_cmd *se_cmd = &cmd->se_cmd;701 702 WARN_ON(!list_empty(&cmd->i_conn_node));703 704 if (cmd->conn)705 sess = cmd->conn->sess;706 else707 sess = cmd->sess;708 709 BUG_ON(!sess || !sess->se_sess);710 711 kfree(cmd->buf_ptr);712 kfree(cmd->pdu_list);713 kfree(cmd->seq_list);714 kfree(cmd->tmr_req);715 kfree(cmd->overflow_buf);716 kfree(cmd->iov_data);717 kfree(cmd->text_in_ptr);718 719 target_free_tag(sess->se_sess, se_cmd);720}721EXPORT_SYMBOL(iscsit_release_cmd);722 723void __iscsit_free_cmd(struct iscsit_cmd *cmd, bool check_queues)724{725 struct iscsit_conn *conn = cmd->conn;726 727 WARN_ON(!list_empty(&cmd->i_conn_node));728 729 if (cmd->data_direction == DMA_TO_DEVICE) {730 iscsit_stop_dataout_timer(cmd);731 iscsit_free_r2ts_from_list(cmd);732 }733 if (cmd->data_direction == DMA_FROM_DEVICE)734 iscsit_free_all_datain_reqs(cmd);735 736 if (conn && check_queues) {737 iscsit_remove_cmd_from_immediate_queue(cmd, conn);738 iscsit_remove_cmd_from_response_queue(cmd, conn);739 }740 741 if (conn && conn->conn_transport->iscsit_unmap_cmd)742 conn->conn_transport->iscsit_unmap_cmd(conn, cmd);743}744 745void iscsit_free_cmd(struct iscsit_cmd *cmd, bool shutdown)746{747 struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL;748 int rc;749 750 WARN_ON(!list_empty(&cmd->i_conn_node));751 752 __iscsit_free_cmd(cmd, shutdown);753 if (se_cmd) {754 rc = transport_generic_free_cmd(se_cmd, shutdown);755 if (!rc && shutdown && se_cmd->se_sess) {756 __iscsit_free_cmd(cmd, shutdown);757 target_put_sess_cmd(se_cmd);758 }759 } else {760 iscsit_release_cmd(cmd);761 }762}763EXPORT_SYMBOL(iscsit_free_cmd);764 765bool iscsit_check_session_usage_count(struct iscsit_session *sess,766 bool can_sleep)767{768 spin_lock_bh(&sess->session_usage_lock);769 if (sess->session_usage_count != 0) {770 sess->session_waiting_on_uc = 1;771 spin_unlock_bh(&sess->session_usage_lock);772 if (!can_sleep)773 return true;774 775 wait_for_completion(&sess->session_waiting_on_uc_comp);776 return false;777 }778 spin_unlock_bh(&sess->session_usage_lock);779 780 return false;781}782 783void iscsit_dec_session_usage_count(struct iscsit_session *sess)784{785 spin_lock_bh(&sess->session_usage_lock);786 sess->session_usage_count--;787 788 if (!sess->session_usage_count && sess->session_waiting_on_uc)789 complete(&sess->session_waiting_on_uc_comp);790 791 spin_unlock_bh(&sess->session_usage_lock);792}793 794void iscsit_inc_session_usage_count(struct iscsit_session *sess)795{796 spin_lock_bh(&sess->session_usage_lock);797 sess->session_usage_count++;798 spin_unlock_bh(&sess->session_usage_lock);799}800 801struct iscsit_conn *iscsit_get_conn_from_cid(struct iscsit_session *sess, u16 cid)802{803 struct iscsit_conn *conn;804 805 spin_lock_bh(&sess->conn_lock);806 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {807 if ((conn->cid == cid) &&808 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) {809 iscsit_inc_conn_usage_count(conn);810 spin_unlock_bh(&sess->conn_lock);811 return conn;812 }813 }814 spin_unlock_bh(&sess->conn_lock);815 816 return NULL;817}818 819struct iscsit_conn *iscsit_get_conn_from_cid_rcfr(struct iscsit_session *sess, u16 cid)820{821 struct iscsit_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 iscsit_inc_conn_usage_count(conn);827 spin_lock(&conn->state_lock);828 atomic_set(&conn->connection_wait_rcfr, 1);829 spin_unlock(&conn->state_lock);830 spin_unlock_bh(&sess->conn_lock);831 return conn;832 }833 }834 spin_unlock_bh(&sess->conn_lock);835 836 return NULL;837}838 839void iscsit_check_conn_usage_count(struct iscsit_conn *conn)840{841 spin_lock_bh(&conn->conn_usage_lock);842 if (conn->conn_usage_count != 0) {843 conn->conn_waiting_on_uc = 1;844 spin_unlock_bh(&conn->conn_usage_lock);845 846 wait_for_completion(&conn->conn_waiting_on_uc_comp);847 return;848 }849 spin_unlock_bh(&conn->conn_usage_lock);850}851 852void iscsit_dec_conn_usage_count(struct iscsit_conn *conn)853{854 spin_lock_bh(&conn->conn_usage_lock);855 conn->conn_usage_count--;856 857 if (!conn->conn_usage_count && conn->conn_waiting_on_uc)858 complete(&conn->conn_waiting_on_uc_comp);859 860 spin_unlock_bh(&conn->conn_usage_lock);861}862 863void iscsit_inc_conn_usage_count(struct iscsit_conn *conn)864{865 spin_lock_bh(&conn->conn_usage_lock);866 conn->conn_usage_count++;867 spin_unlock_bh(&conn->conn_usage_lock);868}869 870static int iscsit_add_nopin(struct iscsit_conn *conn, int want_response)871{872 u8 state;873 struct iscsit_cmd *cmd;874 875 cmd = iscsit_allocate_cmd(conn, TASK_RUNNING);876 if (!cmd)877 return -1;878 879 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN;880 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :881 ISTATE_SEND_NOPIN_NO_RESPONSE;882 cmd->init_task_tag = RESERVED_ITT;883 cmd->targ_xfer_tag = (want_response) ?884 session_get_next_ttt(conn->sess) : 0xFFFFFFFF;885 spin_lock_bh(&conn->cmd_lock);886 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);887 spin_unlock_bh(&conn->cmd_lock);888 889 if (want_response)890 iscsit_start_nopin_response_timer(conn);891 iscsit_add_cmd_to_immediate_queue(cmd, conn, state);892 893 return 0;894}895 896void iscsit_handle_nopin_response_timeout(struct timer_list *t)897{898 struct iscsit_conn *conn = from_timer(conn, t, nopin_response_timer);899 struct iscsit_session *sess = conn->sess;900 901 iscsit_inc_conn_usage_count(conn);902 903 spin_lock_bh(&conn->nopin_timer_lock);904 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) {905 spin_unlock_bh(&conn->nopin_timer_lock);906 iscsit_dec_conn_usage_count(conn);907 return;908 }909 910 pr_err("Did not receive response to NOPIN on CID: %hu, failing"911 " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n",912 conn->cid, sess->sess_ops->InitiatorName, sess->isid,913 sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt);914 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;915 spin_unlock_bh(&conn->nopin_timer_lock);916 917 iscsit_fill_cxn_timeout_err_stats(sess);918 iscsit_cause_connection_reinstatement(conn, 0);919 iscsit_dec_conn_usage_count(conn);920}921 922void iscsit_mod_nopin_response_timer(struct iscsit_conn *conn)923{924 struct iscsit_session *sess = conn->sess;925 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);926 927 spin_lock_bh(&conn->nopin_timer_lock);928 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {929 spin_unlock_bh(&conn->nopin_timer_lock);930 return;931 }932 933 mod_timer(&conn->nopin_response_timer,934 (get_jiffies_64() + na->nopin_response_timeout * HZ));935 spin_unlock_bh(&conn->nopin_timer_lock);936}937 938void iscsit_start_nopin_response_timer(struct iscsit_conn *conn)939{940 struct iscsit_session *sess = conn->sess;941 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);942 943 spin_lock_bh(&conn->nopin_timer_lock);944 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) {945 spin_unlock_bh(&conn->nopin_timer_lock);946 return;947 }948 949 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;950 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;951 mod_timer(&conn->nopin_response_timer,952 jiffies + na->nopin_response_timeout * HZ);953 954 pr_debug("Started NOPIN Response Timer on CID: %d to %u"955 " seconds\n", conn->cid, na->nopin_response_timeout);956 spin_unlock_bh(&conn->nopin_timer_lock);957}958 959void iscsit_stop_nopin_response_timer(struct iscsit_conn *conn)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 conn->nopin_response_timer_flags |= ISCSI_TF_STOP;967 spin_unlock_bh(&conn->nopin_timer_lock);968 969 del_timer_sync(&conn->nopin_response_timer);970 971 spin_lock_bh(&conn->nopin_timer_lock);972 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;973 spin_unlock_bh(&conn->nopin_timer_lock);974}975 976void iscsit_handle_nopin_timeout(struct timer_list *t)977{978 struct iscsit_conn *conn = from_timer(conn, t, nopin_timer);979 980 iscsit_inc_conn_usage_count(conn);981 982 spin_lock_bh(&conn->nopin_timer_lock);983 if (conn->nopin_timer_flags & ISCSI_TF_STOP) {984 spin_unlock_bh(&conn->nopin_timer_lock);985 iscsit_dec_conn_usage_count(conn);986 return;987 }988 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;989 spin_unlock_bh(&conn->nopin_timer_lock);990 991 iscsit_add_nopin(conn, 1);992 iscsit_dec_conn_usage_count(conn);993}994 995void __iscsit_start_nopin_timer(struct iscsit_conn *conn)996{997 struct iscsit_session *sess = conn->sess;998 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);999 1000 lockdep_assert_held(&conn->nopin_timer_lock);1001 1002 /*1003 * NOPIN timeout is disabled.1004 */1005 if (!na->nopin_timeout)1006 return;1007 1008 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)1009 return;1010 1011 conn->nopin_timer_flags &= ~ISCSI_TF_STOP;1012 conn->nopin_timer_flags |= ISCSI_TF_RUNNING;1013 mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);1014 1015 pr_debug("Started NOPIN Timer on CID: %d at %u second"1016 " interval\n", conn->cid, na->nopin_timeout);1017}1018 1019void iscsit_start_nopin_timer(struct iscsit_conn *conn)1020{1021 spin_lock_bh(&conn->nopin_timer_lock);1022 __iscsit_start_nopin_timer(conn);1023 spin_unlock_bh(&conn->nopin_timer_lock);1024}1025 1026void iscsit_stop_nopin_timer(struct iscsit_conn *conn)1027{1028 spin_lock_bh(&conn->nopin_timer_lock);1029 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) {1030 spin_unlock_bh(&conn->nopin_timer_lock);1031 return;1032 }1033 conn->nopin_timer_flags |= ISCSI_TF_STOP;1034 spin_unlock_bh(&conn->nopin_timer_lock);1035 1036 del_timer_sync(&conn->nopin_timer);1037 1038 spin_lock_bh(&conn->nopin_timer_lock);1039 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;1040 spin_unlock_bh(&conn->nopin_timer_lock);1041}1042 1043void iscsit_login_timeout(struct timer_list *t)1044{1045 struct iscsit_conn *conn = from_timer(conn, t, login_timer);1046 struct iscsi_login *login = conn->login;1047 1048 pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n");1049 1050 spin_lock_bh(&conn->login_timer_lock);1051 login->login_failed = 1;1052 1053 if (conn->login_kworker) {1054 pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n",1055 conn->login_kworker->comm, conn->login_kworker->pid);1056 send_sig(SIGINT, conn->login_kworker, 1);1057 } else {1058 schedule_delayed_work(&conn->login_work, 0);1059 }1060 spin_unlock_bh(&conn->login_timer_lock);1061}1062 1063void iscsit_start_login_timer(struct iscsit_conn *conn, struct task_struct *kthr)1064{1065 pr_debug("Login timer started\n");1066 1067 conn->login_kworker = kthr;1068 mod_timer(&conn->login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ);1069}1070 1071int iscsit_set_login_timer_kworker(struct iscsit_conn *conn, struct task_struct *kthr)1072{1073 struct iscsi_login *login = conn->login;1074 int ret = 0;1075 1076 spin_lock_bh(&conn->login_timer_lock);1077 if (login->login_failed) {1078 /* The timer has already expired */1079 ret = -1;1080 } else {1081 conn->login_kworker = kthr;1082 }1083 spin_unlock_bh(&conn->login_timer_lock);1084 1085 return ret;1086}1087 1088void iscsit_stop_login_timer(struct iscsit_conn *conn)1089{1090 pr_debug("Login timer stopped\n");1091 timer_delete_sync(&conn->login_timer);1092}1093 1094int iscsit_send_tx_data(1095 struct iscsit_cmd *cmd,1096 struct iscsit_conn *conn,1097 int use_misc)1098{1099 int tx_sent, tx_size;1100 u32 iov_count;1101 struct kvec *iov;1102 1103send_data:1104 tx_size = cmd->tx_size;1105 1106 if (!use_misc) {1107 iov = &cmd->iov_data[0];1108 iov_count = cmd->iov_data_count;1109 } else {1110 iov = &cmd->iov_misc[0];1111 iov_count = cmd->iov_misc_count;1112 }1113 1114 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size);1115 if (tx_size != tx_sent) {1116 if (tx_sent == -EAGAIN) {1117 pr_err("tx_data() returned -EAGAIN\n");1118 goto send_data;1119 } else1120 return -1;1121 }1122 cmd->tx_size = 0;1123 1124 return 0;1125}1126 1127int iscsit_fe_sendpage_sg(1128 struct iscsit_cmd *cmd,1129 struct iscsit_conn *conn)1130{1131 struct scatterlist *sg = cmd->first_data_sg;1132 struct bio_vec bvec;1133 struct msghdr msghdr = { .msg_flags = MSG_SPLICE_PAGES, };1134 struct kvec iov;1135 u32 tx_hdr_size, data_len;1136 u32 offset = cmd->first_data_sg_off;1137 int tx_sent, iov_off;1138 1139send_hdr:1140 tx_hdr_size = ISCSI_HDR_LEN;1141 if (conn->conn_ops->HeaderDigest)1142 tx_hdr_size += ISCSI_CRC_LEN;1143 1144 iov.iov_base = cmd->pdu;1145 iov.iov_len = tx_hdr_size;1146 1147 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size);1148 if (tx_hdr_size != tx_sent) {1149 if (tx_sent == -EAGAIN) {1150 pr_err("tx_data() returned -EAGAIN\n");1151 goto send_hdr;1152 }1153 return -1;1154 }1155 1156 data_len = cmd->tx_size - tx_hdr_size - cmd->padding;1157 /*1158 * Set iov_off used by padding and data digest tx_data() calls below1159 * in order to determine proper offset into cmd->iov_data[]1160 */1161 if (conn->conn_ops->DataDigest) {1162 data_len -= ISCSI_CRC_LEN;1163 if (cmd->padding)1164 iov_off = (cmd->iov_data_count - 2);1165 else1166 iov_off = (cmd->iov_data_count - 1);1167 } else {1168 iov_off = (cmd->iov_data_count - 1);1169 }1170 /*1171 * Perform sendpage() for each page in the scatterlist1172 */1173 while (data_len) {1174 u32 space = (sg->length - offset);1175 u32 sub_len = min_t(u32, data_len, space);1176send_pg:1177 bvec_set_page(&bvec, sg_page(sg), sub_len, sg->offset + offset);1178 iov_iter_bvec(&msghdr.msg_iter, ITER_SOURCE, &bvec, 1, sub_len);1179 1180 tx_sent = conn->sock->ops->sendmsg(conn->sock, &msghdr,1181 sub_len);1182 if (tx_sent != sub_len) {1183 if (tx_sent == -EAGAIN) {1184 pr_err("sendmsg/splice returned -EAGAIN\n");1185 goto send_pg;1186 }1187 1188 pr_err("sendmsg/splice failure: %d\n", tx_sent);1189 return -1;1190 }1191 1192 data_len -= sub_len;1193 offset = 0;1194 sg = sg_next(sg);1195 }1196 1197send_padding:1198 if (cmd->padding) {1199 struct kvec *iov_p = &cmd->iov_data[iov_off++];1200 1201 tx_sent = tx_data(conn, iov_p, 1, cmd->padding);1202 if (cmd->padding != tx_sent) {1203 if (tx_sent == -EAGAIN) {1204 pr_err("tx_data() returned -EAGAIN\n");1205 goto send_padding;1206 }1207 return -1;1208 }1209 }1210 1211send_datacrc:1212 if (conn->conn_ops->DataDigest) {1213 struct kvec *iov_d = &cmd->iov_data[iov_off];1214 1215 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN);1216 if (ISCSI_CRC_LEN != tx_sent) {1217 if (tx_sent == -EAGAIN) {1218 pr_err("tx_data() returned -EAGAIN\n");1219 goto send_datacrc;1220 }1221 return -1;1222 }1223 }1224 1225 return 0;1226}1227 1228/*1229 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU1230 * back to the Initiator when an expection condition occurs with the1231 * errors set in status_class and status_detail.1232 *1233 * Parameters: iSCSI Connection, Status Class, Status Detail.1234 * Returns: 0 on success, -1 on error.1235 */1236int iscsit_tx_login_rsp(struct iscsit_conn *conn, u8 status_class, u8 status_detail)1237{1238 struct iscsi_login_rsp *hdr;1239 struct iscsi_login *login = conn->conn_login;1240 1241 login->login_failed = 1;1242 iscsit_collect_login_stats(conn, status_class, status_detail);1243 1244 memset(&login->rsp[0], 0, ISCSI_HDR_LEN);1245 1246 hdr = (struct iscsi_login_rsp *)&login->rsp[0];1247 hdr->opcode = ISCSI_OP_LOGIN_RSP;1248 hdr->status_class = status_class;1249 hdr->status_detail = status_detail;1250 hdr->itt = conn->login_itt;1251 1252 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0);1253}1254 1255void iscsit_print_session_params(struct iscsit_session *sess)1256{1257 struct iscsit_conn *conn;1258 1259 pr_debug("-----------------------------[Session Params for"1260 " SID: %u]-----------------------------\n", sess->sid);1261 spin_lock_bh(&sess->conn_lock);1262 list_for_each_entry(conn, &sess->sess_conn_list, conn_list)1263 iscsi_dump_conn_ops(conn->conn_ops);1264 spin_unlock_bh(&sess->conn_lock);1265 1266 iscsi_dump_sess_ops(sess->sess_ops);1267}1268 1269int rx_data(1270 struct iscsit_conn *conn,1271 struct kvec *iov,1272 int iov_count,1273 int data)1274{1275 int rx_loop = 0, total_rx = 0;1276 struct msghdr msg;1277 1278 if (!conn || !conn->sock || !conn->conn_ops)1279 return -1;1280 1281 memset(&msg, 0, sizeof(struct msghdr));1282 iov_iter_kvec(&msg.msg_iter, ITER_DEST, iov, iov_count, data);1283 1284 while (msg_data_left(&msg)) {1285 rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL);1286 if (rx_loop <= 0) {1287 pr_debug("rx_loop: %d total_rx: %d\n",1288 rx_loop, total_rx);1289 return rx_loop;1290 }1291 total_rx += rx_loop;1292 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",1293 rx_loop, total_rx, data);1294 }1295 1296 return total_rx;1297}1298 1299int tx_data(1300 struct iscsit_conn *conn,1301 struct kvec *iov,1302 int iov_count,1303 int data)1304{1305 struct msghdr msg;1306 int total_tx = 0;1307 1308 if (!conn || !conn->sock || !conn->conn_ops)1309 return -1;1310 1311 if (data <= 0) {1312 pr_err("Data length is: %d\n", data);1313 return -1;1314 }1315 1316 memset(&msg, 0, sizeof(struct msghdr));1317 1318 iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, iov, iov_count, data);1319 1320 while (msg_data_left(&msg)) {1321 int tx_loop = sock_sendmsg(conn->sock, &msg);1322 if (tx_loop <= 0) {1323 pr_debug("tx_loop: %d total_tx %d\n",1324 tx_loop, total_tx);1325 return tx_loop;1326 }1327 total_tx += tx_loop;1328 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",1329 tx_loop, total_tx, data);1330 }1331 1332 return total_tx;1333}1334 1335void iscsit_collect_login_stats(1336 struct iscsit_conn *conn,1337 u8 status_class,1338 u8 status_detail)1339{1340 struct iscsi_param *intrname = NULL;1341 struct iscsi_tiqn *tiqn;1342 struct iscsi_login_stats *ls;1343 1344 tiqn = iscsit_snmp_get_tiqn(conn);1345 if (!tiqn)1346 return;1347 1348 ls = &tiqn->login_stats;1349 1350 spin_lock(&ls->lock);1351 if (status_class == ISCSI_STATUS_CLS_SUCCESS)1352 ls->accepts++;1353 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {1354 ls->redirects++;1355 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT;1356 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&1357 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) {1358 ls->authenticate_fails++;1359 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE;1360 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&1361 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) {1362 ls->authorize_fails++;1363 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE;1364 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&1365 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) {1366 ls->negotiate_fails++;1367 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE;1368 } else {1369 ls->other_fails++;1370 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER;1371 }1372 1373 /* Save initiator name, ip address and time, if it is a failed login */1374 if (status_class != ISCSI_STATUS_CLS_SUCCESS) {1375 if (conn->param_list)1376 intrname = iscsi_find_param_from_key(INITIATORNAME,1377 conn->param_list);1378 strscpy(ls->last_intr_fail_name,1379 (intrname ? intrname->value : "Unknown"),1380 sizeof(ls->last_intr_fail_name));1381 1382 ls->last_intr_fail_ip_family = conn->login_family;1383 1384 ls->last_intr_fail_sockaddr = conn->login_sockaddr;1385 ls->last_fail_time = get_jiffies_64();1386 }1387 1388 spin_unlock(&ls->lock);1389}1390 1391struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsit_conn *conn)1392{1393 struct iscsi_portal_group *tpg;1394 1395 if (!conn)1396 return NULL;1397 1398 tpg = conn->tpg;1399 if (!tpg)1400 return NULL;1401 1402 if (!tpg->tpg_tiqn)1403 return NULL;1404 1405 return tpg->tpg_tiqn;1406}1407 1408void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess)1409{1410 struct iscsi_portal_group *tpg = sess->tpg;1411 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;1412 1413 if (!tiqn)1414 return;1415 1416 spin_lock_bh(&tiqn->sess_err_stats.lock);1417 strscpy(tiqn->sess_err_stats.last_sess_fail_rem_name,1418 sess->sess_ops->InitiatorName,1419 sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name));1420 tiqn->sess_err_stats.last_sess_failure_type =1421 ISCSI_SESS_ERR_CXN_TIMEOUT;1422 tiqn->sess_err_stats.cxn_timeout_errors++;1423 atomic_long_inc(&sess->conn_timeout_errors);1424 spin_unlock_bh(&tiqn->sess_err_stats.lock);1425}1426