1/******************************************************************************* 2 * This file contains main functions related to iSCSI Parameter negotiation. 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/ctype.h> 20#include <linux/kthread.h> 21#include <scsi/iscsi_proto.h> 22#include <target/target_core_base.h> 23#include <target/target_core_fabric.h> 24#include <target/iscsi/iscsi_transport.h> 25 26#include <target/iscsi/iscsi_target_core.h> 27#include "iscsi_target_parameters.h" 28#include "iscsi_target_login.h" 29#include "iscsi_target_nego.h" 30#include "iscsi_target_tpg.h" 31#include "iscsi_target_util.h" 32#include "iscsi_target.h" 33#include "iscsi_target_auth.h" 34 35#define MAX_LOGIN_PDUS 7 36#define TEXT_LEN 4096 37 38void convert_null_to_semi(char *buf, int len) 39{ 40 int i; 41 42 for (i = 0; i < len; i++) 43 if (buf[i] == '\0') 44 buf[i] = ';'; 45} 46 47static int strlen_semi(char *buf) 48{ 49 int i = 0; 50 51 while (buf[i] != '\0') { 52 if (buf[i] == ';') 53 return i; 54 i++; 55 } 56 57 return -1; 58} 59 60int extract_param( 61 const char *in_buf, 62 const char *pattern, 63 unsigned int max_length, 64 char *out_buf, 65 unsigned char *type) 66{ 67 char *ptr; 68 int len; 69 70 if (!in_buf || !pattern || !out_buf || !type) 71 return -1; 72 73 ptr = strstr(in_buf, pattern); 74 if (!ptr) 75 return -1; 76 77 ptr = strstr(ptr, "="); 78 if (!ptr) 79 return -1; 80 81 ptr += 1; 82 if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) { 83 ptr += 2; /* skip 0x */ 84 *type = HEX; 85 } else 86 *type = DECIMAL; 87 88 len = strlen_semi(ptr); 89 if (len < 0) 90 return -1; 91 92 if (len >= max_length) { 93 pr_err("Length of input: %d exceeds max_length:" 94 " %d\n", len, max_length); 95 return -1; 96 } 97 memcpy(out_buf, ptr, len); 98 out_buf[len] = '\0'; 99 100 return 0; 101} 102 103static u32 iscsi_handle_authentication( 104 struct iscsi_conn *conn, 105 char *in_buf, 106 char *out_buf, 107 int in_length, 108 int *out_length, 109 unsigned char *authtype) 110{ 111 struct iscsi_session *sess = conn->sess; 112 struct iscsi_node_auth *auth; 113 struct iscsi_node_acl *iscsi_nacl; 114 struct iscsi_portal_group *iscsi_tpg; 115 struct se_node_acl *se_nacl; 116 117 if (!sess->sess_ops->SessionType) { 118 /* 119 * For SessionType=Normal 120 */ 121 se_nacl = conn->sess->se_sess->se_node_acl; 122 if (!se_nacl) { 123 pr_err("Unable to locate struct se_node_acl for" 124 " CHAP auth\n"); 125 return -1; 126 } 127 iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl, 128 se_node_acl); 129 if (!iscsi_nacl) { 130 pr_err("Unable to locate struct iscsi_node_acl for" 131 " CHAP auth\n"); 132 return -1; 133 } 134 135 if (se_nacl->dynamic_node_acl) { 136 iscsi_tpg = container_of(se_nacl->se_tpg, 137 struct iscsi_portal_group, tpg_se_tpg); 138 139 auth = &iscsi_tpg->tpg_demo_auth; 140 } else { 141 iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl, 142 se_node_acl); 143 144 auth = &iscsi_nacl->node_auth; 145 } 146 } else { 147 /* 148 * For SessionType=Discovery 149 */ 150 auth = &iscsit_global->discovery_acl.node_auth; 151 } 152 153 if (strstr("CHAP", authtype)) 154 strcpy(conn->sess->auth_type, "CHAP"); 155 else 156 strcpy(conn->sess->auth_type, NONE); 157 158 if (strstr("None", authtype)) 159 return 1; 160#ifdef CANSRP 161 else if (strstr("SRP", authtype)) 162 return srp_main_loop(conn, auth, in_buf, out_buf, 163 &in_length, out_length); 164#endif 165 else if (strstr("CHAP", authtype)) 166 return chap_main_loop(conn, auth, in_buf, out_buf, 167 &in_length, out_length); 168 else if (strstr("SPKM1", authtype)) 169 return 2; 170 else if (strstr("SPKM2", authtype)) 171 return 2; 172 else if (strstr("KRB5", authtype)) 173 return 2; 174 else 175 return 2; 176} 177 178static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn) 179{ 180 kfree(conn->auth_protocol); 181} 182 183int iscsi_target_check_login_request( 184 struct iscsi_conn *conn, 185 struct iscsi_login *login) 186{ 187 int req_csg, req_nsg; 188 u32 payload_length; 189 struct iscsi_login_req *login_req; 190 191 login_req = (struct iscsi_login_req *) login->req; 192 payload_length = ntoh24(login_req->dlength); 193 194 switch (login_req->opcode & ISCSI_OPCODE_MASK) { 195 case ISCSI_OP_LOGIN: 196 break; 197 default: 198 pr_err("Received unknown opcode 0x%02x.\n", 199 login_req->opcode & ISCSI_OPCODE_MASK); 200 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 201 ISCSI_LOGIN_STATUS_INIT_ERR); 202 return -1; 203 } 204 205 if ((login_req->flags & ISCSI_FLAG_LOGIN_CONTINUE) && 206 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { 207 pr_err("Login request has both ISCSI_FLAG_LOGIN_CONTINUE" 208 " and ISCSI_FLAG_LOGIN_TRANSIT set, protocol error.\n"); 209 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 210 ISCSI_LOGIN_STATUS_INIT_ERR); 211 return -1; 212 } 213 214 req_csg = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); 215 req_nsg = ISCSI_LOGIN_NEXT_STAGE(login_req->flags); 216 217 if (req_csg != login->current_stage) { 218 pr_err("Initiator unexpectedly changed login stage" 219 " from %d to %d, login failed.\n", login->current_stage, 220 req_csg); 221 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 222 ISCSI_LOGIN_STATUS_INIT_ERR); 223 return -1; 224 } 225 226 if ((req_nsg == 2) || (req_csg >= 2) || 227 ((login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT) && 228 (req_nsg <= req_csg))) { 229 pr_err("Illegal login_req->flags Combination, CSG: %d," 230 " NSG: %d, ISCSI_FLAG_LOGIN_TRANSIT: %d.\n", req_csg, 231 req_nsg, (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)); 232 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 233 ISCSI_LOGIN_STATUS_INIT_ERR); 234 return -1; 235 } 236 237 if ((login_req->max_version != login->version_max) || 238 (login_req->min_version != login->version_min)) { 239 pr_err("Login request changed Version Max/Nin" 240 " unexpectedly to 0x%02x/0x%02x, protocol error\n", 241 login_req->max_version, login_req->min_version); 242 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 243 ISCSI_LOGIN_STATUS_INIT_ERR); 244 return -1; 245 } 246 247 if (memcmp(login_req->isid, login->isid, 6) != 0) { 248 pr_err("Login request changed ISID unexpectedly," 249 " protocol error.\n"); 250 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 251 ISCSI_LOGIN_STATUS_INIT_ERR); 252 return -1; 253 } 254 255 if (login_req->itt != login->init_task_tag) { 256 pr_err("Login request changed ITT unexpectedly to" 257 " 0x%08x, protocol error.\n", login_req->itt); 258 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 259 ISCSI_LOGIN_STATUS_INIT_ERR); 260 return -1; 261 } 262 263 if (payload_length > MAX_KEY_VALUE_PAIRS) { 264 pr_err("Login request payload exceeds default" 265 " MaxRecvDataSegmentLength: %u, protocol error.\n", 266 MAX_KEY_VALUE_PAIRS); 267 return -1; 268 } 269 270 return 0; 271} 272 273static int iscsi_target_check_first_request( 274 struct iscsi_conn *conn, 275 struct iscsi_login *login) 276{ 277 struct iscsi_param *param = NULL; 278 struct se_node_acl *se_nacl; 279 280 login->first_request = 0; 281 282 list_for_each_entry(param, &conn->param_list->param_list, p_list) { 283 if (!strncmp(param->name, SESSIONTYPE, 11)) { 284 if (!IS_PSTATE_ACCEPTOR(param)) { 285 pr_err("SessionType key not received" 286 " in first login request.\n"); 287 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 288 ISCSI_LOGIN_STATUS_MISSING_FIELDS); 289 return -1; 290 } 291 if (!strncmp(param->value, DISCOVERY, 9)) 292 return 0; 293 } 294 295 if (!strncmp(param->name, INITIATORNAME, 13)) { 296 if (!IS_PSTATE_ACCEPTOR(param)) { 297 if (!login->leading_connection) 298 continue; 299 300 pr_err("InitiatorName key not received" 301 " in first login request.\n"); 302 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 303 ISCSI_LOGIN_STATUS_MISSING_FIELDS); 304 return -1; 305 } 306 307 /* 308 * For non-leading connections, double check that the 309 * received InitiatorName matches the existing session's 310 * struct iscsi_node_acl. 311 */ 312 if (!login->leading_connection) { 313 se_nacl = conn->sess->se_sess->se_node_acl; 314 if (!se_nacl) { 315 pr_err("Unable to locate" 316 " struct se_node_acl\n"); 317 iscsit_tx_login_rsp(conn, 318 ISCSI_STATUS_CLS_INITIATOR_ERR, 319 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND); 320 return -1; 321 } 322 323 if (strcmp(param->value, 324 se_nacl->initiatorname)) { 325 pr_err("Incorrect" 326 " InitiatorName: %s for this" 327 " iSCSI Initiator Node.\n", 328 param->value); 329 iscsit_tx_login_rsp(conn, 330 ISCSI_STATUS_CLS_INITIATOR_ERR, 331 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND); 332 return -1; 333 } 334 } 335 } 336 } 337 338 return 0; 339} 340 341static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login) 342{ 343 u32 padding = 0; 344 struct iscsi_session *sess = conn->sess; 345 struct iscsi_login_rsp *login_rsp; 346 347 login_rsp = (struct iscsi_login_rsp *) login->rsp; 348 349 login_rsp->opcode = ISCSI_OP_LOGIN_RSP; 350 hton24(login_rsp->dlength, login->rsp_length); 351 memcpy(login_rsp->isid, login->isid, 6); 352 login_rsp->tsih = cpu_to_be16(login->tsih); 353 login_rsp->itt = login->init_task_tag; 354 login_rsp->statsn = cpu_to_be32(conn->stat_sn++); 355 login_rsp->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 356 login_rsp->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 357 358 pr_debug("Sending Login Response, Flags: 0x%02x, ITT: 0x%08x," 359 " ExpCmdSN; 0x%08x, MaxCmdSN: 0x%08x, StatSN: 0x%08x, Length:" 360 " %u\n", login_rsp->flags, (__force u32)login_rsp->itt, 361 ntohl(login_rsp->exp_cmdsn), ntohl(login_rsp->max_cmdsn), 362 ntohl(login_rsp->statsn), login->rsp_length); 363 364 padding = ((-login->rsp_length) & 3); 365 /* 366 * Before sending the last login response containing the transition 367 * bit for full-feature-phase, go ahead and start up TX/RX threads 368 * now to avoid potential resource allocation failures after the 369 * final login response has been sent. 370 */ 371 if (login->login_complete) { 372 int rc = iscsit_start_kthreads(conn); 373 if (rc) { 374 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 375 ISCSI_LOGIN_STATUS_NO_RESOURCES); 376 return -1; 377 } 378 } 379 380 if (conn->conn_transport->iscsit_put_login_tx(conn, login, 381 login->rsp_length + padding) < 0) 382 goto err; 383 384 login->rsp_length = 0; 385 mutex_lock(&sess->cmdsn_mutex); 386 login_rsp->exp_cmdsn = cpu_to_be32(sess->exp_cmd_sn); 387 login_rsp->max_cmdsn = cpu_to_be32(sess->max_cmd_sn); 388 mutex_unlock(&sess->cmdsn_mutex); 389 390 return 0; 391 392err: 393 if (login->login_complete) { 394 if (conn->rx_thread && conn->rx_thread_active) { 395 send_sig(SIGINT, conn->rx_thread, 1); 396 complete(&conn->rx_login_comp); 397 kthread_stop(conn->rx_thread); 398 } 399 if (conn->tx_thread && conn->tx_thread_active) { 400 send_sig(SIGINT, conn->tx_thread, 1); 401 kthread_stop(conn->tx_thread); 402 } 403 spin_lock(&iscsit_global->ts_bitmap_lock); 404 bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, 405 get_order(1)); 406 spin_unlock(&iscsit_global->ts_bitmap_lock); 407 } 408 return -1; 409} 410 411static void iscsi_target_sk_data_ready(struct sock *sk) 412{ 413 struct iscsi_conn *conn = sk->sk_user_data; 414 bool rc; 415 416 pr_debug("Entering iscsi_target_sk_data_ready: conn: %p\n", conn); 417 418 write_lock_bh(&sk->sk_callback_lock); 419 if (!sk->sk_user_data) { 420 write_unlock_bh(&sk->sk_callback_lock); 421 return; 422 } 423 if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) { 424 write_unlock_bh(&sk->sk_callback_lock); 425 pr_debug("Got LOGIN_FLAGS_READY=0, conn: %p >>>>\n", conn); 426 return; 427 } 428 if (test_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) { 429 write_unlock_bh(&sk->sk_callback_lock); 430 pr_debug("Got LOGIN_FLAGS_CLOSED=1, conn: %p >>>>\n", conn); 431 return; 432 } 433 if (test_and_set_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) { 434 write_unlock_bh(&sk->sk_callback_lock); 435 pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1, conn: %p >>>>\n", conn); 436 return; 437 } 438 439 rc = schedule_delayed_work(&conn->login_work, 0); 440 if (!rc) { 441 pr_debug("iscsi_target_sk_data_ready, schedule_delayed_work" 442 " got false\n"); 443 } 444 write_unlock_bh(&sk->sk_callback_lock); 445} 446 447static void iscsi_target_sk_state_change(struct sock *); 448 449static void iscsi_target_set_sock_callbacks(struct iscsi_conn *conn) 450{ 451 struct sock *sk; 452 453 if (!conn->sock) 454 return; 455 456 sk = conn->sock->sk; 457 pr_debug("Entering iscsi_target_set_sock_callbacks: conn: %p\n", conn); 458 459 write_lock_bh(&sk->sk_callback_lock); 460 sk->sk_user_data = conn; 461 conn->orig_data_ready = sk->sk_data_ready; 462 conn->orig_state_change = sk->sk_state_change; 463 sk->sk_data_ready = iscsi_target_sk_data_ready; 464 sk->sk_state_change = iscsi_target_sk_state_change; 465 write_unlock_bh(&sk->sk_callback_lock); 466 467 sk->sk_sndtimeo = TA_LOGIN_TIMEOUT * HZ; 468 sk->sk_rcvtimeo = TA_LOGIN_TIMEOUT * HZ; 469} 470 471static void iscsi_target_restore_sock_callbacks(struct iscsi_conn *conn) 472{ 473 struct sock *sk; 474 475 if (!conn->sock) 476 return; 477 478 sk = conn->sock->sk; 479 pr_debug("Entering iscsi_target_restore_sock_callbacks: conn: %p\n", conn); 480 481 write_lock_bh(&sk->sk_callback_lock); 482 if (!sk->sk_user_data) { 483 write_unlock_bh(&sk->sk_callback_lock); 484 return; 485 } 486 sk->sk_user_data = NULL; 487 sk->sk_data_ready = conn->orig_data_ready; 488 sk->sk_state_change = conn->orig_state_change; 489 write_unlock_bh(&sk->sk_callback_lock); 490 491 sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; 492 sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT; 493} 494 495static int iscsi_target_do_login(struct iscsi_conn *, struct iscsi_login *); 496 497static bool iscsi_target_sk_state_check(struct sock *sk) 498{ 499 if (sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) { 500 pr_debug("iscsi_target_sk_state_check: TCP_CLOSE_WAIT|TCP_CLOSE," 501 "returning FALSE\n"); 502 return false; 503 } 504 return true; 505} 506 507static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login *login) 508{ 509 struct iscsi_np *np = login->np; 510 bool zero_tsih = login->zero_tsih; 511 512 iscsi_remove_failed_auth_entry(conn); 513 iscsi_target_nego_release(conn); 514 iscsi_target_login_sess_out(conn, np, zero_tsih, true); 515} 516 517static void iscsi_target_login_timeout(unsigned long data) 518{ 519 struct iscsi_conn *conn = (struct iscsi_conn *)data; 520 521 pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n"); 522 523 if (conn->login_kworker) { 524 pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n", 525 conn->login_kworker->comm, conn->login_kworker->pid); 526 send_sig(SIGINT, conn->login_kworker, 1); 527 } 528} 529 530static void iscsi_target_do_login_rx(struct work_struct *work) 531{ 532 struct iscsi_conn *conn = container_of(work, 533 struct iscsi_conn, login_work.work); 534 struct iscsi_login *login = conn->login; 535 struct iscsi_np *np = login->np; 536 struct iscsi_portal_group *tpg = conn->tpg; 537 struct iscsi_tpg_np *tpg_np = conn->tpg_np; 538 struct timer_list login_timer; 539 int rc, zero_tsih = login->zero_tsih; 540 bool state; 541 542 pr_debug("entering iscsi_target_do_login_rx, conn: %p, %s:%d\n", 543 conn, current->comm, current->pid); 544 545 spin_lock(&tpg->tpg_state_lock); 546 state = (tpg->tpg_state == TPG_STATE_ACTIVE); 547 spin_unlock(&tpg->tpg_state_lock); 548 549 if (!state) { 550 pr_debug("iscsi_target_do_login_rx: tpg_state != TPG_STATE_ACTIVE\n"); 551 iscsi_target_restore_sock_callbacks(conn); 552 iscsi_target_login_drop(conn, login); 553 iscsit_deaccess_np(np, tpg, tpg_np); 554 return; 555 } 556 557 if (conn->sock) { 558 struct sock *sk = conn->sock->sk; 559 560 read_lock_bh(&sk->sk_callback_lock); 561 state = iscsi_target_sk_state_check(sk); 562 read_unlock_bh(&sk->sk_callback_lock); 563 564 if (!state) { 565 pr_debug("iscsi_target_do_login_rx, TCP state CLOSE\n"); 566 iscsi_target_restore_sock_callbacks(conn); 567 iscsi_target_login_drop(conn, login); 568 iscsit_deaccess_np(np, tpg, tpg_np); 569 return; 570 } 571 } 572 573 conn->login_kworker = current; 574 allow_signal(SIGINT); 575 576 init_timer(&login_timer); 577 login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); 578 login_timer.data = (unsigned long)conn; 579 login_timer.function = iscsi_target_login_timeout; 580 add_timer(&login_timer); 581 pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid); 582 583 rc = conn->conn_transport->iscsit_get_login_rx(conn, login); 584 del_timer_sync(&login_timer); 585 flush_signals(current); 586 conn->login_kworker = NULL; 587 588 if (rc < 0) { 589 iscsi_target_restore_sock_callbacks(conn); 590 iscsi_target_login_drop(conn, login); 591 iscsit_deaccess_np(np, tpg, tpg_np); 592 return; 593 } 594 595 pr_debug("iscsi_target_do_login_rx after rx_login_io, %p, %s:%d\n", 596 conn, current->comm, current->pid); 597 598 rc = iscsi_target_do_login(conn, login); 599 if (rc < 0) { 600 iscsi_target_restore_sock_callbacks(conn); 601 iscsi_target_login_drop(conn, login); 602 iscsit_deaccess_np(np, tpg, tpg_np); 603 } else if (!rc) { 604 if (conn->sock) { 605 struct sock *sk = conn->sock->sk; 606 607 write_lock_bh(&sk->sk_callback_lock); 608 clear_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags); 609 write_unlock_bh(&sk->sk_callback_lock); 610 } 611 } else if (rc == 1) { 612 iscsi_target_nego_release(conn); 613 iscsi_post_login_handler(np, conn, zero_tsih); 614 iscsit_deaccess_np(np, tpg, tpg_np); 615 } 616} 617 618static void iscsi_target_do_cleanup(struct work_struct *work) 619{ 620 struct iscsi_conn *conn = container_of(work, 621 struct iscsi_conn, login_cleanup_work.work); 622 struct sock *sk = conn->sock->sk; 623 struct iscsi_login *login = conn->login; 624 struct iscsi_np *np = login->np; 625 struct iscsi_portal_group *tpg = conn->tpg; 626 struct iscsi_tpg_np *tpg_np = conn->tpg_np; 627 628 pr_debug("Entering iscsi_target_do_cleanup\n"); 629 630 cancel_delayed_work_sync(&conn->login_work); 631 conn->orig_state_change(sk); 632 633 iscsi_target_restore_sock_callbacks(conn); 634 iscsi_target_login_drop(conn, login); 635 iscsit_deaccess_np(np, tpg, tpg_np); 636 637 pr_debug("iscsi_target_do_cleanup done()\n"); 638} 639 640static void iscsi_target_sk_state_change(struct sock *sk) 641{ 642 struct iscsi_conn *conn; 643 void (*orig_state_change)(struct sock *); 644 bool state; 645 646 pr_debug("Entering iscsi_target_sk_state_change\n"); 647 648 write_lock_bh(&sk->sk_callback_lock); 649 conn = sk->sk_user_data; 650 if (!conn) { 651 write_unlock_bh(&sk->sk_callback_lock); 652 return; 653 } 654 orig_state_change = conn->orig_state_change; 655 656 if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) { 657 pr_debug("Got LOGIN_FLAGS_READY=0 sk_state_change conn: %p\n", 658 conn); 659 write_unlock_bh(&sk->sk_callback_lock); 660 orig_state_change(sk); 661 return; 662 } 663 if (test_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) { 664 pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1 sk_state_change" 665 " conn: %p\n", conn); 666 write_unlock_bh(&sk->sk_callback_lock); 667 orig_state_change(sk); 668 return; 669 } 670 if (test_and_set_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) { 671 pr_debug("Got LOGIN_FLAGS_CLOSED=1 sk_state_change conn: %p\n", 672 conn); 673 write_unlock_bh(&sk->sk_callback_lock); 674 orig_state_change(sk); 675 return; 676 } 677 678 state = iscsi_target_sk_state_check(sk); 679 write_unlock_bh(&sk->sk_callback_lock); 680 681 pr_debug("iscsi_target_sk_state_change: state: %d\n", state); 682 683 if (!state) { 684 pr_debug("iscsi_target_sk_state_change got failed state\n"); 685 schedule_delayed_work(&conn->login_cleanup_work, 0); 686 return; 687 } 688 orig_state_change(sk); 689} 690 691/* 692 * NOTE: We check for existing sessions or connections AFTER the initiator 693 * has been successfully authenticated in order to protect against faked 694 * ISID/TSIH combinations. 695 */ 696static int iscsi_target_check_for_existing_instances( 697 struct iscsi_conn *conn, 698 struct iscsi_login *login) 699{ 700 if (login->checked_for_existing) 701 return 0; 702 703 login->checked_for_existing = 1; 704 705 if (!login->tsih) 706 return iscsi_check_for_session_reinstatement(conn); 707 else 708 return iscsi_login_post_auth_non_zero_tsih(conn, login->cid, 709 login->initial_exp_statsn); 710} 711 712static int iscsi_target_do_authentication( 713 struct iscsi_conn *conn, 714 struct iscsi_login *login) 715{ 716 int authret; 717 u32 payload_length; 718 struct iscsi_param *param; 719 struct iscsi_login_req *login_req; 720 struct iscsi_login_rsp *login_rsp; 721 722 login_req = (struct iscsi_login_req *) login->req; 723 login_rsp = (struct iscsi_login_rsp *) login->rsp; 724 payload_length = ntoh24(login_req->dlength); 725 726 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list); 727 if (!param) 728 return -1; 729 730 authret = iscsi_handle_authentication( 731 conn, 732 login->req_buf, 733 login->rsp_buf, 734 payload_length, 735 &login->rsp_length, 736 param->value); 737 switch (authret) { 738 case 0: 739 pr_debug("Received OK response" 740 " from LIO Authentication, continuing.\n"); 741 break; 742 case 1: 743 pr_debug("iSCSI security negotiation" 744 " completed successfully.\n"); 745 login->auth_complete = 1; 746 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) && 747 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { 748 login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 | 749 ISCSI_FLAG_LOGIN_TRANSIT); 750 login->current_stage = 1; 751 } 752 return iscsi_target_check_for_existing_instances( 753 conn, login); 754 case 2: 755 pr_err("Security negotiation" 756 " failed.\n"); 757 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 758 ISCSI_LOGIN_STATUS_AUTH_FAILED); 759 return -1; 760 default: 761 pr_err("Received unknown error %d from LIO" 762 " Authentication\n", authret); 763 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 764 ISCSI_LOGIN_STATUS_TARGET_ERROR); 765 return -1; 766 } 767 768 return 0; 769} 770 771static int iscsi_target_handle_csg_zero( 772 struct iscsi_conn *conn, 773 struct iscsi_login *login) 774{ 775 int ret; 776 u32 payload_length; 777 struct iscsi_param *param; 778 struct iscsi_login_req *login_req; 779 struct iscsi_login_rsp *login_rsp; 780 781 login_req = (struct iscsi_login_req *) login->req; 782 login_rsp = (struct iscsi_login_rsp *) login->rsp; 783 payload_length = ntoh24(login_req->dlength); 784 785 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list); 786 if (!param) 787 return -1; 788 789 ret = iscsi_decode_text_input( 790 PHASE_SECURITY|PHASE_DECLARATIVE, 791 SENDER_INITIATOR|SENDER_RECEIVER, 792 login->req_buf, 793 payload_length, 794 conn); 795 if (ret < 0) 796 return -1; 797 798 if (ret > 0) { 799 if (login->auth_complete) { 800 pr_err("Initiator has already been" 801 " successfully authenticated, but is still" 802 " sending %s keys.\n", param->value); 803 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 804 ISCSI_LOGIN_STATUS_INIT_ERR); 805 return -1; 806 } 807 808 goto do_auth; 809 } else if (!payload_length) { 810 pr_err("Initiator sent zero length security payload," 811 " login failed\n"); 812 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 813 ISCSI_LOGIN_STATUS_AUTH_FAILED); 814 return -1; 815 } 816 817 if (login->first_request) 818 if (iscsi_target_check_first_request(conn, login) < 0) 819 return -1; 820 821 ret = iscsi_encode_text_output( 822 PHASE_SECURITY|PHASE_DECLARATIVE, 823 SENDER_TARGET, 824 login->rsp_buf, 825 &login->rsp_length, 826 conn->param_list); 827 if (ret < 0) 828 return -1; 829 830 if (!iscsi_check_negotiated_keys(conn->param_list)) { 831 if (conn->tpg->tpg_attrib.authentication && 832 !strncmp(param->value, NONE, 4)) { 833 pr_err("Initiator sent AuthMethod=None but" 834 " Target is enforcing iSCSI Authentication," 835 " login failed.\n"); 836 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 837 ISCSI_LOGIN_STATUS_AUTH_FAILED); 838 return -1; 839 } 840 841 if (conn->tpg->tpg_attrib.authentication && 842 !login->auth_complete) 843 return 0; 844 845 if (strncmp(param->value, NONE, 4) && !login->auth_complete) 846 return 0; 847 848 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) && 849 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { 850 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 | 851 ISCSI_FLAG_LOGIN_TRANSIT; 852 login->current_stage = 1; 853 } 854 } 855 856 return 0; 857do_auth: 858 return iscsi_target_do_authentication(conn, login); 859} 860 861static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login) 862{ 863 int ret; 864 u32 payload_length; 865 struct iscsi_login_req *login_req; 866 struct iscsi_login_rsp *login_rsp; 867 868 login_req = (struct iscsi_login_req *) login->req; 869 login_rsp = (struct iscsi_login_rsp *) login->rsp; 870 payload_length = ntoh24(login_req->dlength); 871 872 ret = iscsi_decode_text_input( 873 PHASE_OPERATIONAL|PHASE_DECLARATIVE, 874 SENDER_INITIATOR|SENDER_RECEIVER, 875 login->req_buf, 876 payload_length, 877 conn); 878 if (ret < 0) { 879 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 880 ISCSI_LOGIN_STATUS_INIT_ERR); 881 return -1; 882 } 883 884 if (login->first_request) 885 if (iscsi_target_check_first_request(conn, login) < 0) 886 return -1; 887 888 if (iscsi_target_check_for_existing_instances(conn, login) < 0) 889 return -1; 890 891 ret = iscsi_encode_text_output( 892 PHASE_OPERATIONAL|PHASE_DECLARATIVE, 893 SENDER_TARGET, 894 login->rsp_buf, 895 &login->rsp_length, 896 conn->param_list); 897 if (ret < 0) { 898 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 899 ISCSI_LOGIN_STATUS_INIT_ERR); 900 return -1; 901 } 902 903 if (!login->auth_complete && 904 conn->tpg->tpg_attrib.authentication) { 905 pr_err("Initiator is requesting CSG: 1, has not been" 906 " successfully authenticated, and the Target is" 907 " enforcing iSCSI Authentication, login failed.\n"); 908 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 909 ISCSI_LOGIN_STATUS_AUTH_FAILED); 910 return -1; 911 } 912 913 if (!iscsi_check_negotiated_keys(conn->param_list)) 914 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) && 915 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) 916 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 | 917 ISCSI_FLAG_LOGIN_TRANSIT; 918 919 return 0; 920} 921 922static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login) 923{ 924 int pdu_count = 0; 925 struct iscsi_login_req *login_req; 926 struct iscsi_login_rsp *login_rsp; 927 928 login_req = (struct iscsi_login_req *) login->req; 929 login_rsp = (struct iscsi_login_rsp *) login->rsp; 930 931 while (1) { 932 if (++pdu_count > MAX_LOGIN_PDUS) { 933 pr_err("MAX_LOGIN_PDUS count reached.\n"); 934 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 935 ISCSI_LOGIN_STATUS_TARGET_ERROR); 936 return -1; 937 } 938 939 switch (ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)) { 940 case 0: 941 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK; 942 if (iscsi_target_handle_csg_zero(conn, login) < 0) 943 return -1; 944 break; 945 case 1: 946 login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1; 947 if (iscsi_target_handle_csg_one(conn, login) < 0) 948 return -1; 949 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) { 950 login->tsih = conn->sess->tsih; 951 login->login_complete = 1; 952 iscsi_target_restore_sock_callbacks(conn); 953 if (iscsi_target_do_tx_login_io(conn, 954 login) < 0) 955 return -1; 956 return 1; 957 } 958 break; 959 default: 960 pr_err("Illegal CSG: %d received from" 961 " Initiator, protocol error.\n", 962 ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)); 963 break; 964 } 965 966 if (iscsi_target_do_tx_login_io(conn, login) < 0) 967 return -1; 968 969 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) { 970 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT; 971 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK; 972 } 973 break; 974 } 975 976 if (conn->sock) { 977 struct sock *sk = conn->sock->sk; 978 bool state; 979 980 read_lock_bh(&sk->sk_callback_lock); 981 state = iscsi_target_sk_state_check(sk); 982 read_unlock_bh(&sk->sk_callback_lock); 983 984 if (!state) { 985 pr_debug("iscsi_target_do_login() failed state for" 986 " conn: %p\n", conn); 987 return -1; 988 } 989 } 990 991 return 0; 992} 993 994static void iscsi_initiatorname_tolower( 995 char *param_buf) 996{ 997 char *c; 998 u32 iqn_size = strlen(param_buf), i; 999 1000 for (i = 0; i < iqn_size; i++) { 1001 c = ¶m_buf[i]; 1002 if (!isupper(*c)) 1003 continue; 1004 1005 *c = tolower(*c); 1006 } 1007} 1008 1009/* 1010 * Processes the first Login Request.. 1011 */ 1012int iscsi_target_locate_portal( 1013 struct iscsi_np *np, 1014 struct iscsi_conn *conn, 1015 struct iscsi_login *login) 1016{ 1017 char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL; 1018 char *tmpbuf, *start = NULL, *end = NULL, *key, *value; 1019 struct iscsi_session *sess = conn->sess; 1020 struct iscsi_tiqn *tiqn; 1021 struct iscsi_tpg_np *tpg_np = NULL; 1022 struct iscsi_login_req *login_req; 1023 struct se_node_acl *se_nacl; 1024 u32 payload_length, queue_depth = 0; 1025 int sessiontype = 0, ret = 0, tag_num, tag_size; 1026 1027 INIT_DELAYED_WORK(&conn->login_work, iscsi_target_do_login_rx); 1028 INIT_DELAYED_WORK(&conn->login_cleanup_work, iscsi_target_do_cleanup); 1029 iscsi_target_set_sock_callbacks(conn); 1030 1031 login->np = np; 1032 1033 login_req = (struct iscsi_login_req *) login->req; 1034 payload_length = ntoh24(login_req->dlength); 1035 1036 tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL); 1037 if (!tmpbuf) { 1038 pr_err("Unable to allocate memory for tmpbuf.\n"); 1039 return -1; 1040 } 1041 1042 memcpy(tmpbuf, login->req_buf, payload_length); 1043 tmpbuf[payload_length] = '\0'; 1044 start = tmpbuf; 1045 end = (start + payload_length); 1046 1047 /* 1048 * Locate the initial keys expected from the Initiator node in 1049 * the first login request in order to progress with the login phase. 1050 */ 1051 while (start < end) { 1052 if (iscsi_extract_key_value(start, &key, &value) < 0) { 1053 ret = -1; 1054 goto out; 1055 } 1056 1057 if (!strncmp(key, "InitiatorName", 13)) 1058 i_buf = value; 1059 else if (!strncmp(key, "SessionType", 11)) 1060 s_buf = value; 1061 else if (!strncmp(key, "TargetName", 10)) 1062 t_buf = value; 1063 1064 start += strlen(key) + strlen(value) + 2; 1065 } 1066 /* 1067 * See 5.3. Login Phase. 1068 */ 1069 if (!i_buf) { 1070 pr_err("InitiatorName key not received" 1071 " in first login request.\n"); 1072 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1073 ISCSI_LOGIN_STATUS_MISSING_FIELDS); 1074 ret = -1; 1075 goto out; 1076 } 1077 /* 1078 * Convert the incoming InitiatorName to lowercase following 1079 * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs 1080 * are NOT case sensitive. 1081 */ 1082 iscsi_initiatorname_tolower(i_buf); 1083 1084 if (!s_buf) { 1085 if (!login->leading_connection) 1086 goto get_target; 1087 1088 pr_err("SessionType key not received" 1089 " in first login request.\n"); 1090 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1091 ISCSI_LOGIN_STATUS_MISSING_FIELDS); 1092 ret = -1; 1093 goto out; 1094 } 1095 1096 /* 1097 * Use default portal group for discovery sessions. 1098 */ 1099 sessiontype = strncmp(s_buf, DISCOVERY, 9); 1100 if (!sessiontype) { 1101 conn->tpg = iscsit_global->discovery_tpg; 1102 if (!login->leading_connection) 1103 goto get_target; 1104 1105 sess->sess_ops->SessionType = 1; 1106 /* 1107 * Setup crc32c modules from libcrypto 1108 */ 1109 if (iscsi_login_setup_crypto(conn) < 0) { 1110 pr_err("iscsi_login_setup_crypto() failed\n"); 1111 ret = -1; 1112 goto out; 1113 } 1114 /* 1115 * Serialize access across the discovery struct iscsi_portal_group to 1116 * process login attempt. 1117 */ 1118 if (iscsit_access_np(np, conn->tpg) < 0) { 1119 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1120 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1121 ret = -1; 1122 goto out; 1123 } 1124 ret = 0; 1125 goto alloc_tags; 1126 } 1127 1128get_target: 1129 if (!t_buf) { 1130 pr_err("TargetName key not received" 1131 " in first login request while" 1132 " SessionType=Normal.\n"); 1133 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1134 ISCSI_LOGIN_STATUS_MISSING_FIELDS); 1135 ret = -1; 1136 goto out; 1137 } 1138 1139 /* 1140 * Locate Target IQN from Storage Node. 1141 */ 1142 tiqn = iscsit_get_tiqn_for_login(t_buf); 1143 if (!tiqn) { 1144 pr_err("Unable to locate Target IQN: %s in" 1145 " Storage Node\n", t_buf); 1146 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1147 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1148 ret = -1; 1149 goto out; 1150 } 1151 pr_debug("Located Storage Object: %s\n", tiqn->tiqn); 1152 1153 /* 1154 * Locate Target Portal Group from Storage Node. 1155 */ 1156 conn->tpg = iscsit_get_tpg_from_np(tiqn, np, &tpg_np); 1157 if (!conn->tpg) { 1158 pr_err("Unable to locate Target Portal Group" 1159 " on %s\n", tiqn->tiqn); 1160 iscsit_put_tiqn_for_login(tiqn); 1161 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1162 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1163 ret = -1; 1164 goto out; 1165 } 1166 conn->tpg_np = tpg_np; 1167 pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt); 1168 /* 1169 * Setup crc32c modules from libcrypto 1170 */ 1171 if (iscsi_login_setup_crypto(conn) < 0) { 1172 pr_err("iscsi_login_setup_crypto() failed\n"); 1173 kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); 1174 iscsit_put_tiqn_for_login(tiqn); 1175 conn->tpg = NULL; 1176 ret = -1; 1177 goto out; 1178 } 1179 /* 1180 * Serialize access across the struct iscsi_portal_group to 1181 * process login attempt. 1182 */ 1183 if (iscsit_access_np(np, conn->tpg) < 0) { 1184 kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); 1185 iscsit_put_tiqn_for_login(tiqn); 1186 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1187 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1188 conn->tpg = NULL; 1189 ret = -1; 1190 goto out; 1191 } 1192 1193 /* 1194 * conn->sess->node_acl will be set when the referenced 1195 * struct iscsi_session is located from received ISID+TSIH in 1196 * iscsi_login_non_zero_tsih_s2(). 1197 */ 1198 if (!login->leading_connection) { 1199 ret = 0; 1200 goto out; 1201 } 1202 1203 /* 1204 * This value is required in iscsi_login_zero_tsih_s2() 1205 */ 1206 sess->sess_ops->SessionType = 0; 1207 1208 /* 1209 * Locate incoming Initiator IQN reference from Storage Node. 1210 */ 1211 sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 1212 &conn->tpg->tpg_se_tpg, i_buf); 1213 if (!sess->se_sess->se_node_acl) { 1214 pr_err("iSCSI Initiator Node: %s is not authorized to" 1215 " access iSCSI target portal group: %hu.\n", 1216 i_buf, conn->tpg->tpgt); 1217 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1218 ISCSI_LOGIN_STATUS_TGT_FORBIDDEN); 1219 ret = -1; 1220 goto out; 1221 } 1222 se_nacl = sess->se_sess->se_node_acl; 1223 queue_depth = se_nacl->queue_depth; 1224 /* 1225 * Setup pre-allocated tags based upon allowed per NodeACL CmdSN 1226 * depth for non immediate commands, plus extra tags for immediate 1227 * commands. 1228 * 1229 * Also enforce a ISCSIT_MIN_TAGS to prevent unnecessary contention 1230 * in per-cpu-ida tag allocation logic + small queue_depth. 1231 */ 1232alloc_tags: 1233 tag_num = max_t(u32, ISCSIT_MIN_TAGS, queue_depth); 1234 tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; 1235 tag_size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 1236 1237 ret = transport_alloc_session_tags(sess->se_sess, tag_num, tag_size); 1238 if (ret < 0) { 1239 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1240 ISCSI_LOGIN_STATUS_NO_RESOURCES); 1241 ret = -1; 1242 } 1243out: 1244 kfree(tmpbuf); 1245 return ret; 1246} 1247 1248int iscsi_target_start_negotiation( 1249 struct iscsi_login *login, 1250 struct iscsi_conn *conn) 1251{ 1252 int ret; 1253 1254 ret = iscsi_target_do_login(conn, login); 1255 if (!ret) { 1256 if (conn->sock) { 1257 struct sock *sk = conn->sock->sk; 1258 1259 write_lock_bh(&sk->sk_callback_lock); 1260 set_bit(LOGIN_FLAGS_READY, &conn->login_flags); 1261 write_unlock_bh(&sk->sk_callback_lock); 1262 } 1263 } else if (ret < 0) { 1264 cancel_delayed_work_sync(&conn->login_work); 1265 cancel_delayed_work_sync(&conn->login_cleanup_work); 1266 iscsi_target_restore_sock_callbacks(conn); 1267 iscsi_remove_failed_auth_entry(conn); 1268 } 1269 if (ret != 0) 1270 iscsi_target_nego_release(conn); 1271 1272 return ret; 1273} 1274 1275void iscsi_target_nego_release(struct iscsi_conn *conn) 1276{ 1277 struct iscsi_login *login = conn->conn_login; 1278 1279 if (!login) 1280 return; 1281 1282 kfree(login->req_buf); 1283 kfree(login->rsp_buf); 1284 kfree(login); 1285 1286 conn->conn_login = NULL; 1287} 1288