?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'r6040-next'
[linux/fpc-iii.git] / drivers / target / iscsi / iscsi_target_nego.c
blob89d34bd6d87f94519c26168741b74bcb6478061a
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
38 void 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
47 static 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
60 int 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
103 static 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
178 static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn)
179 {
180 kfree(conn->auth_protocol);
181 }
182
183 int 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 EXPORT_SYMBOL(iscsi_target_check_login_request);
273
274 static int iscsi_target_check_first_request(
275 struct iscsi_conn *conn,
276 struct iscsi_login *login)
277 {
278 struct iscsi_param *param = NULL;
279 struct se_node_acl *se_nacl;
280
281 login->first_request = 0;
282
283 list_for_each_entry(param, &conn->param_list->param_list, p_list) {
284 if (!strncmp(param->name, SESSIONTYPE, 11)) {
285 if (!IS_PSTATE_ACCEPTOR(param)) {
286 pr_err("SessionType key not received"
287 " in first login request.\n");
288 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
289 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
290 return -1;
291 }
292 if (!strncmp(param->value, DISCOVERY, 9))
293 return 0;
294 }
295
296 if (!strncmp(param->name, INITIATORNAME, 13)) {
297 if (!IS_PSTATE_ACCEPTOR(param)) {
298 if (!login->leading_connection)
299 continue;
300
301 pr_err("InitiatorName key not received"
302 " in first login request.\n");
303 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
304 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
305 return -1;
306 }
307
308 /*
309 * For non-leading connections, double check that the
310 * received InitiatorName matches the existing session's
311 * struct iscsi_node_acl.
312 */
313 if (!login->leading_connection) {
314 se_nacl = conn->sess->se_sess->se_node_acl;
315 if (!se_nacl) {
316 pr_err("Unable to locate"
317 " struct se_node_acl\n");
318 iscsit_tx_login_rsp(conn,
319 ISCSI_STATUS_CLS_INITIATOR_ERR,
320 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
321 return -1;
322 }
323
324 if (strcmp(param->value,
325 se_nacl->initiatorname)) {
326 pr_err("Incorrect"
327 " InitiatorName: %s for this"
328 " iSCSI Initiator Node.\n",
329 param->value);
330 iscsit_tx_login_rsp(conn,
331 ISCSI_STATUS_CLS_INITIATOR_ERR,
332 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
333 return -1;
334 }
335 }
336 }
337 }
338
339 return 0;
340 }
341
342 static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
343 {
344 u32 padding = 0;
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((u32) atomic_read(&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
386 return 0;
387
388 err:
389 if (login->login_complete) {
390 if (conn->rx_thread && conn->rx_thread_active) {
391 send_sig(SIGINT, conn->rx_thread, 1);
392 complete(&conn->rx_login_comp);
393 kthread_stop(conn->rx_thread);
394 }
395 if (conn->tx_thread && conn->tx_thread_active) {
396 send_sig(SIGINT, conn->tx_thread, 1);
397 kthread_stop(conn->tx_thread);
398 }
399 spin_lock(&iscsit_global->ts_bitmap_lock);
400 bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id,
401 get_order(1));
402 spin_unlock(&iscsit_global->ts_bitmap_lock);
403 }
404 return -1;
405 }
406
407 static void iscsi_target_sk_data_ready(struct sock *sk)
408 {
409 struct iscsi_conn *conn = sk->sk_user_data;
410 bool rc;
411
412 pr_debug("Entering iscsi_target_sk_data_ready: conn: %p\n", conn);
413
414 write_lock_bh(&sk->sk_callback_lock);
415 if (!sk->sk_user_data) {
416 write_unlock_bh(&sk->sk_callback_lock);
417 return;
418 }
419 if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) {
420 write_unlock_bh(&sk->sk_callback_lock);
421 pr_debug("Got LOGIN_FLAGS_READY=0, conn: %p >>>>\n", conn);
422 return;
423 }
424 if (test_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) {
425 write_unlock_bh(&sk->sk_callback_lock);
426 pr_debug("Got LOGIN_FLAGS_CLOSED=1, conn: %p >>>>\n", conn);
427 return;
428 }
429 if (test_and_set_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) {
430 write_unlock_bh(&sk->sk_callback_lock);
431 pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1, conn: %p >>>>\n", conn);
432 return;
433 }
434
435 rc = schedule_delayed_work(&conn->login_work, 0);
436 if (!rc) {
437 pr_debug("iscsi_target_sk_data_ready, schedule_delayed_work"
438 " got false\n");
439 }
440 write_unlock_bh(&sk->sk_callback_lock);
441 }
442
443 static void iscsi_target_sk_state_change(struct sock *);
444
445 static void iscsi_target_set_sock_callbacks(struct iscsi_conn *conn)
446 {
447 struct sock *sk;
448
449 if (!conn->sock)
450 return;
451
452 sk = conn->sock->sk;
453 pr_debug("Entering iscsi_target_set_sock_callbacks: conn: %p\n", conn);
454
455 write_lock_bh(&sk->sk_callback_lock);
456 sk->sk_user_data = conn;
457 conn->orig_data_ready = sk->sk_data_ready;
458 conn->orig_state_change = sk->sk_state_change;
459 sk->sk_data_ready = iscsi_target_sk_data_ready;
460 sk->sk_state_change = iscsi_target_sk_state_change;
461 write_unlock_bh(&sk->sk_callback_lock);
462
463 sk->sk_sndtimeo = TA_LOGIN_TIMEOUT * HZ;
464 sk->sk_rcvtimeo = TA_LOGIN_TIMEOUT * HZ;
465 }
466
467 static void iscsi_target_restore_sock_callbacks(struct iscsi_conn *conn)
468 {
469 struct sock *sk;
470
471 if (!conn->sock)
472 return;
473
474 sk = conn->sock->sk;
475 pr_debug("Entering iscsi_target_restore_sock_callbacks: conn: %p\n", conn);
476
477 write_lock_bh(&sk->sk_callback_lock);
478 if (!sk->sk_user_data) {
479 write_unlock_bh(&sk->sk_callback_lock);
480 return;
481 }
482 sk->sk_user_data = NULL;
483 sk->sk_data_ready = conn->orig_data_ready;
484 sk->sk_state_change = conn->orig_state_change;
485 write_unlock_bh(&sk->sk_callback_lock);
486
487 sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
488 sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
489 }
490
491 static int iscsi_target_do_login(struct iscsi_conn *, struct iscsi_login *);
492
493 static bool iscsi_target_sk_state_check(struct sock *sk)
494 {
495 if (sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) {
496 pr_debug("iscsi_target_sk_state_check: TCP_CLOSE_WAIT|TCP_CLOSE,"
497 "returning FALSE\n");
498 return false;
499 }
500 return true;
501 }
502
503 static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login *login)
504 {
505 struct iscsi_np *np = login->np;
506 bool zero_tsih = login->zero_tsih;
507
508 iscsi_remove_failed_auth_entry(conn);
509 iscsi_target_nego_release(conn);
510 iscsi_target_login_sess_out(conn, np, zero_tsih, true);
511 }
512
513 static void iscsi_target_login_timeout(unsigned long data)
514 {
515 struct iscsi_conn *conn = (struct iscsi_conn *)data;
516
517 pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n");
518
519 if (conn->login_kworker) {
520 pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n",
521 conn->login_kworker->comm, conn->login_kworker->pid);
522 send_sig(SIGINT, conn->login_kworker, 1);
523 }
524 }
525
526 static void iscsi_target_do_login_rx(struct work_struct *work)
527 {
528 struct iscsi_conn *conn = container_of(work,
529 struct iscsi_conn, login_work.work);
530 struct iscsi_login *login = conn->login;
531 struct iscsi_np *np = login->np;
532 struct iscsi_portal_group *tpg = conn->tpg;
533 struct iscsi_tpg_np *tpg_np = conn->tpg_np;
534 struct timer_list login_timer;
535 int rc, zero_tsih = login->zero_tsih;
536 bool state;
537
538 pr_debug("entering iscsi_target_do_login_rx, conn: %p, %s:%d\n",
539 conn, current->comm, current->pid);
540
541 spin_lock(&tpg->tpg_state_lock);
542 state = (tpg->tpg_state == TPG_STATE_ACTIVE);
543 spin_unlock(&tpg->tpg_state_lock);
544
545 if (!state) {
546 pr_debug("iscsi_target_do_login_rx: tpg_state != TPG_STATE_ACTIVE\n");
547 iscsi_target_restore_sock_callbacks(conn);
548 iscsi_target_login_drop(conn, login);
549 iscsit_deaccess_np(np, tpg, tpg_np);
550 return;
551 }
552
553 if (conn->sock) {
554 struct sock *sk = conn->sock->sk;
555
556 read_lock_bh(&sk->sk_callback_lock);
557 state = iscsi_target_sk_state_check(sk);
558 read_unlock_bh(&sk->sk_callback_lock);
559
560 if (!state) {
561 pr_debug("iscsi_target_do_login_rx, TCP state CLOSE\n");
562 iscsi_target_restore_sock_callbacks(conn);
563 iscsi_target_login_drop(conn, login);
564 iscsit_deaccess_np(np, tpg, tpg_np);
565 return;
566 }
567 }
568
569 conn->login_kworker = current;
570 allow_signal(SIGINT);
571
572 init_timer(&login_timer);
573 login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
574 login_timer.data = (unsigned long)conn;
575 login_timer.function = iscsi_target_login_timeout;
576 add_timer(&login_timer);
577 pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid);
578
579 rc = conn->conn_transport->iscsit_get_login_rx(conn, login);
580 del_timer_sync(&login_timer);
581 flush_signals(current);
582 conn->login_kworker = NULL;
583
584 if (rc < 0) {
585 iscsi_target_restore_sock_callbacks(conn);
586 iscsi_target_login_drop(conn, login);
587 iscsit_deaccess_np(np, tpg, tpg_np);
588 return;
589 }
590
591 pr_debug("iscsi_target_do_login_rx after rx_login_io, %p, %s:%d\n",
592 conn, current->comm, current->pid);
593
594 rc = iscsi_target_do_login(conn, login);
595 if (rc < 0) {
596 iscsi_target_restore_sock_callbacks(conn);
597 iscsi_target_login_drop(conn, login);
598 iscsit_deaccess_np(np, tpg, tpg_np);
599 } else if (!rc) {
600 if (conn->sock) {
601 struct sock *sk = conn->sock->sk;
602
603 write_lock_bh(&sk->sk_callback_lock);
604 clear_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags);
605 write_unlock_bh(&sk->sk_callback_lock);
606 }
607 } else if (rc == 1) {
608 iscsi_target_nego_release(conn);
609 iscsi_post_login_handler(np, conn, zero_tsih);
610 iscsit_deaccess_np(np, tpg, tpg_np);
611 }
612 }
613
614 static void iscsi_target_do_cleanup(struct work_struct *work)
615 {
616 struct iscsi_conn *conn = container_of(work,
617 struct iscsi_conn, login_cleanup_work.work);
618 struct sock *sk = conn->sock->sk;
619 struct iscsi_login *login = conn->login;
620 struct iscsi_np *np = login->np;
621 struct iscsi_portal_group *tpg = conn->tpg;
622 struct iscsi_tpg_np *tpg_np = conn->tpg_np;
623
624 pr_debug("Entering iscsi_target_do_cleanup\n");
625
626 cancel_delayed_work_sync(&conn->login_work);
627 conn->orig_state_change(sk);
628
629 iscsi_target_restore_sock_callbacks(conn);
630 iscsi_target_login_drop(conn, login);
631 iscsit_deaccess_np(np, tpg, tpg_np);
632
633 pr_debug("iscsi_target_do_cleanup done()\n");
634 }
635
636 static void iscsi_target_sk_state_change(struct sock *sk)
637 {
638 struct iscsi_conn *conn;
639 void (*orig_state_change)(struct sock *);
640 bool state;
641
642 pr_debug("Entering iscsi_target_sk_state_change\n");
643
644 write_lock_bh(&sk->sk_callback_lock);
645 conn = sk->sk_user_data;
646 if (!conn) {
647 write_unlock_bh(&sk->sk_callback_lock);
648 return;
649 }
650 orig_state_change = conn->orig_state_change;
651
652 if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) {
653 pr_debug("Got LOGIN_FLAGS_READY=0 sk_state_change conn: %p\n",
654 conn);
655 write_unlock_bh(&sk->sk_callback_lock);
656 orig_state_change(sk);
657 return;
658 }
659 if (test_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) {
660 pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1 sk_state_change"
661 " conn: %p\n", conn);
662 write_unlock_bh(&sk->sk_callback_lock);
663 orig_state_change(sk);
664 return;
665 }
666 if (test_and_set_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) {
667 pr_debug("Got LOGIN_FLAGS_CLOSED=1 sk_state_change conn: %p\n",
668 conn);
669 write_unlock_bh(&sk->sk_callback_lock);
670 orig_state_change(sk);
671 return;
672 }
673
674 state = iscsi_target_sk_state_check(sk);
675 write_unlock_bh(&sk->sk_callback_lock);
676
677 pr_debug("iscsi_target_sk_state_change: state: %d\n", state);
678
679 if (!state) {
680 pr_debug("iscsi_target_sk_state_change got failed state\n");
681 schedule_delayed_work(&conn->login_cleanup_work, 0);
682 return;
683 }
684 orig_state_change(sk);
685 }
686
687 /*
688 * NOTE: We check for existing sessions or connections AFTER the initiator
689 * has been successfully authenticated in order to protect against faked
690 * ISID/TSIH combinations.
691 */
692 static int iscsi_target_check_for_existing_instances(
693 struct iscsi_conn *conn,
694 struct iscsi_login *login)
695 {
696 if (login->checked_for_existing)
697 return 0;
698
699 login->checked_for_existing = 1;
700
701 if (!login->tsih)
702 return iscsi_check_for_session_reinstatement(conn);
703 else
704 return iscsi_login_post_auth_non_zero_tsih(conn, login->cid,
705 login->initial_exp_statsn);
706 }
707
708 static int iscsi_target_do_authentication(
709 struct iscsi_conn *conn,
710 struct iscsi_login *login)
711 {
712 int authret;
713 u32 payload_length;
714 struct iscsi_param *param;
715 struct iscsi_login_req *login_req;
716 struct iscsi_login_rsp *login_rsp;
717
718 login_req = (struct iscsi_login_req *) login->req;
719 login_rsp = (struct iscsi_login_rsp *) login->rsp;
720 payload_length = ntoh24(login_req->dlength);
721
722 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
723 if (!param)
724 return -1;
725
726 authret = iscsi_handle_authentication(
727 conn,
728 login->req_buf,
729 login->rsp_buf,
730 payload_length,
731 &login->rsp_length,
732 param->value);
733 switch (authret) {
734 case 0:
735 pr_debug("Received OK response"
736 " from LIO Authentication, continuing.\n");
737 break;
738 case 1:
739 pr_debug("iSCSI security negotiation"
740 " completed successfully.\n");
741 login->auth_complete = 1;
742 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
743 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
744 login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
745 ISCSI_FLAG_LOGIN_TRANSIT);
746 login->current_stage = 1;
747 }
748 return iscsi_target_check_for_existing_instances(
749 conn, login);
750 case 2:
751 pr_err("Security negotiation"
752 " failed.\n");
753 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
754 ISCSI_LOGIN_STATUS_AUTH_FAILED);
755 return -1;
756 default:
757 pr_err("Received unknown error %d from LIO"
758 " Authentication\n", authret);
759 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
760 ISCSI_LOGIN_STATUS_TARGET_ERROR);
761 return -1;
762 }
763
764 return 0;
765 }
766
767 static int iscsi_target_handle_csg_zero(
768 struct iscsi_conn *conn,
769 struct iscsi_login *login)
770 {
771 int ret;
772 u32 payload_length;
773 struct iscsi_param *param;
774 struct iscsi_login_req *login_req;
775 struct iscsi_login_rsp *login_rsp;
776
777 login_req = (struct iscsi_login_req *) login->req;
778 login_rsp = (struct iscsi_login_rsp *) login->rsp;
779 payload_length = ntoh24(login_req->dlength);
780
781 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
782 if (!param)
783 return -1;
784
785 ret = iscsi_decode_text_input(
786 PHASE_SECURITY|PHASE_DECLARATIVE,
787 SENDER_INITIATOR|SENDER_RECEIVER,
788 login->req_buf,
789 payload_length,
790 conn);
791 if (ret < 0)
792 return -1;
793
794 if (ret > 0) {
795 if (login->auth_complete) {
796 pr_err("Initiator has already been"
797 " successfully authenticated, but is still"
798 " sending %s keys.\n", param->value);
799 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
800 ISCSI_LOGIN_STATUS_INIT_ERR);
801 return -1;
802 }
803
804 goto do_auth;
805 } else if (!payload_length) {
806 pr_err("Initiator sent zero length security payload,"
807 " login failed\n");
808 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
809 ISCSI_LOGIN_STATUS_AUTH_FAILED);
810 return -1;
811 }
812
813 if (login->first_request)
814 if (iscsi_target_check_first_request(conn, login) < 0)
815 return -1;
816
817 ret = iscsi_encode_text_output(
818 PHASE_SECURITY|PHASE_DECLARATIVE,
819 SENDER_TARGET,
820 login->rsp_buf,
821 &login->rsp_length,
822 conn->param_list);
823 if (ret < 0)
824 return -1;
825
826 if (!iscsi_check_negotiated_keys(conn->param_list)) {
827 if (conn->tpg->tpg_attrib.authentication &&
828 !strncmp(param->value, NONE, 4)) {
829 pr_err("Initiator sent AuthMethod=None but"
830 " Target is enforcing iSCSI Authentication,"
831 " login failed.\n");
832 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
833 ISCSI_LOGIN_STATUS_AUTH_FAILED);
834 return -1;
835 }
836
837 if (conn->tpg->tpg_attrib.authentication &&
838 !login->auth_complete)
839 return 0;
840
841 if (strncmp(param->value, NONE, 4) && !login->auth_complete)
842 return 0;
843
844 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
845 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
846 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
847 ISCSI_FLAG_LOGIN_TRANSIT;
848 login->current_stage = 1;
849 }
850 }
851
852 return 0;
853 do_auth:
854 return iscsi_target_do_authentication(conn, login);
855 }
856
857 static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login)
858 {
859 int ret;
860 u32 payload_length;
861 struct iscsi_login_req *login_req;
862 struct iscsi_login_rsp *login_rsp;
863
864 login_req = (struct iscsi_login_req *) login->req;
865 login_rsp = (struct iscsi_login_rsp *) login->rsp;
866 payload_length = ntoh24(login_req->dlength);
867
868 ret = iscsi_decode_text_input(
869 PHASE_OPERATIONAL|PHASE_DECLARATIVE,
870 SENDER_INITIATOR|SENDER_RECEIVER,
871 login->req_buf,
872 payload_length,
873 conn);
874 if (ret < 0) {
875 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
876 ISCSI_LOGIN_STATUS_INIT_ERR);
877 return -1;
878 }
879
880 if (login->first_request)
881 if (iscsi_target_check_first_request(conn, login) < 0)
882 return -1;
883
884 if (iscsi_target_check_for_existing_instances(conn, login) < 0)
885 return -1;
886
887 ret = iscsi_encode_text_output(
888 PHASE_OPERATIONAL|PHASE_DECLARATIVE,
889 SENDER_TARGET,
890 login->rsp_buf,
891 &login->rsp_length,
892 conn->param_list);
893 if (ret < 0) {
894 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
895 ISCSI_LOGIN_STATUS_INIT_ERR);
896 return -1;
897 }
898
899 if (!login->auth_complete &&
900 conn->tpg->tpg_attrib.authentication) {
901 pr_err("Initiator is requesting CSG: 1, has not been"
902 " successfully authenticated, and the Target is"
903 " enforcing iSCSI Authentication, login failed.\n");
904 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
905 ISCSI_LOGIN_STATUS_AUTH_FAILED);
906 return -1;
907 }
908
909 if (!iscsi_check_negotiated_keys(conn->param_list))
910 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) &&
911 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT))
912 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 |
913 ISCSI_FLAG_LOGIN_TRANSIT;
914
915 return 0;
916 }
917
918 static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login)
919 {
920 int pdu_count = 0;
921 struct iscsi_login_req *login_req;
922 struct iscsi_login_rsp *login_rsp;
923
924 login_req = (struct iscsi_login_req *) login->req;
925 login_rsp = (struct iscsi_login_rsp *) login->rsp;
926
927 while (1) {
928 if (++pdu_count > MAX_LOGIN_PDUS) {
929 pr_err("MAX_LOGIN_PDUS count reached.\n");
930 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
931 ISCSI_LOGIN_STATUS_TARGET_ERROR);
932 return -1;
933 }
934
935 switch (ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)) {
936 case 0:
937 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK;
938 if (iscsi_target_handle_csg_zero(conn, login) < 0)
939 return -1;
940 break;
941 case 1:
942 login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1;
943 if (iscsi_target_handle_csg_one(conn, login) < 0)
944 return -1;
945 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
946 login->tsih = conn->sess->tsih;
947 login->login_complete = 1;
948 iscsi_target_restore_sock_callbacks(conn);
949 if (iscsi_target_do_tx_login_io(conn,
950 login) < 0)
951 return -1;
952 return 1;
953 }
954 break;
955 default:
956 pr_err("Illegal CSG: %d received from"
957 " Initiator, protocol error.\n",
958 ISCSI_LOGIN_CURRENT_STAGE(login_req->flags));
959 break;
960 }
961
962 if (iscsi_target_do_tx_login_io(conn, login) < 0)
963 return -1;
964
965 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
966 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT;
967 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK;
968 }
969 break;
970 }
971
972 if (conn->sock) {
973 struct sock *sk = conn->sock->sk;
974 bool state;
975
976 read_lock_bh(&sk->sk_callback_lock);
977 state = iscsi_target_sk_state_check(sk);
978 read_unlock_bh(&sk->sk_callback_lock);
979
980 if (!state) {
981 pr_debug("iscsi_target_do_login() failed state for"
982 " conn: %p\n", conn);
983 return -1;
984 }
985 }
986
987 return 0;
988 }
989
990 static void iscsi_initiatorname_tolower(
991 char *param_buf)
992 {
993 char *c;
994 u32 iqn_size = strlen(param_buf), i;
995
996 for (i = 0; i < iqn_size; i++) {
997 c = &param_buf[i];
998 if (!isupper(*c))
999 continue;
1000
1001 *c = tolower(*c);
1002 }
1003 }
1004
1005 /*
1006 * Processes the first Login Request..
1007 */
1008 int iscsi_target_locate_portal(
1009 struct iscsi_np *np,
1010 struct iscsi_conn *conn,
1011 struct iscsi_login *login)
1012 {
1013 char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL;
1014 char *tmpbuf, *start = NULL, *end = NULL, *key, *value;
1015 struct iscsi_session *sess = conn->sess;
1016 struct iscsi_tiqn *tiqn;
1017 struct iscsi_tpg_np *tpg_np = NULL;
1018 struct iscsi_login_req *login_req;
1019 struct se_node_acl *se_nacl;
1020 u32 payload_length, queue_depth = 0;
1021 int sessiontype = 0, ret = 0, tag_num, tag_size;
1022
1023 INIT_DELAYED_WORK(&conn->login_work, iscsi_target_do_login_rx);
1024 INIT_DELAYED_WORK(&conn->login_cleanup_work, iscsi_target_do_cleanup);
1025 iscsi_target_set_sock_callbacks(conn);
1026
1027 login->np = np;
1028
1029 login_req = (struct iscsi_login_req *) login->req;
1030 payload_length = ntoh24(login_req->dlength);
1031
1032 tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL);
1033 if (!tmpbuf) {
1034 pr_err("Unable to allocate memory for tmpbuf.\n");
1035 return -1;
1036 }
1037
1038 memcpy(tmpbuf, login->req_buf, payload_length);
1039 tmpbuf[payload_length] = '\0';
1040 start = tmpbuf;
1041 end = (start + payload_length);
1042
1043 /*
1044 * Locate the initial keys expected from the Initiator node in
1045 * the first login request in order to progress with the login phase.
1046 */
1047 while (start < end) {
1048 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1049 ret = -1;
1050 goto out;
1051 }
1052
1053 if (!strncmp(key, "InitiatorName", 13))
1054 i_buf = value;
1055 else if (!strncmp(key, "SessionType", 11))
1056 s_buf = value;
1057 else if (!strncmp(key, "TargetName", 10))
1058 t_buf = value;
1059
1060 start += strlen(key) + strlen(value) + 2;
1061 }
1062 /*
1063 * See 5.3. Login Phase.
1064 */
1065 if (!i_buf) {
1066 pr_err("InitiatorName key not received"
1067 " in first login request.\n");
1068 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1069 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
1070 ret = -1;
1071 goto out;
1072 }
1073 /*
1074 * Convert the incoming InitiatorName to lowercase following
1075 * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs
1076 * are NOT case sensitive.
1077 */
1078 iscsi_initiatorname_tolower(i_buf);
1079
1080 if (!s_buf) {
1081 if (!login->leading_connection)
1082 goto get_target;
1083
1084 pr_err("SessionType key not received"
1085 " in first login request.\n");
1086 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1087 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
1088 ret = -1;
1089 goto out;
1090 }
1091
1092 /*
1093 * Use default portal group for discovery sessions.
1094 */
1095 sessiontype = strncmp(s_buf, DISCOVERY, 9);
1096 if (!sessiontype) {
1097 conn->tpg = iscsit_global->discovery_tpg;
1098 if (!login->leading_connection)
1099 goto get_target;
1100
1101 sess->sess_ops->SessionType = 1;
1102 /*
1103 * Setup crc32c modules from libcrypto
1104 */
1105 if (iscsi_login_setup_crypto(conn) < 0) {
1106 pr_err("iscsi_login_setup_crypto() failed\n");
1107 ret = -1;
1108 goto out;
1109 }
1110 /*
1111 * Serialize access across the discovery struct iscsi_portal_group to
1112 * process login attempt.
1113 */
1114 if (iscsit_access_np(np, conn->tpg) < 0) {
1115 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1116 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1117 ret = -1;
1118 goto out;
1119 }
1120 ret = 0;
1121 goto alloc_tags;
1122 }
1123
1124 get_target:
1125 if (!t_buf) {
1126 pr_err("TargetName key not received"
1127 " in first login request while"
1128 " SessionType=Normal.\n");
1129 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1130 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
1131 ret = -1;
1132 goto out;
1133 }
1134
1135 /*
1136 * Locate Target IQN from Storage Node.
1137 */
1138 tiqn = iscsit_get_tiqn_for_login(t_buf);
1139 if (!tiqn) {
1140 pr_err("Unable to locate Target IQN: %s in"
1141 " Storage Node\n", t_buf);
1142 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1143 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1144 ret = -1;
1145 goto out;
1146 }
1147 pr_debug("Located Storage Object: %s\n", tiqn->tiqn);
1148
1149 /*
1150 * Locate Target Portal Group from Storage Node.
1151 */
1152 conn->tpg = iscsit_get_tpg_from_np(tiqn, np, &tpg_np);
1153 if (!conn->tpg) {
1154 pr_err("Unable to locate Target Portal Group"
1155 " on %s\n", tiqn->tiqn);
1156 iscsit_put_tiqn_for_login(tiqn);
1157 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1158 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1159 ret = -1;
1160 goto out;
1161 }
1162 conn->tpg_np = tpg_np;
1163 pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt);
1164 /*
1165 * Setup crc32c modules from libcrypto
1166 */
1167 if (iscsi_login_setup_crypto(conn) < 0) {
1168 pr_err("iscsi_login_setup_crypto() failed\n");
1169 kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
1170 iscsit_put_tiqn_for_login(tiqn);
1171 conn->tpg = NULL;
1172 ret = -1;
1173 goto out;
1174 }
1175 /*
1176 * Serialize access across the struct iscsi_portal_group to
1177 * process login attempt.
1178 */
1179 if (iscsit_access_np(np, conn->tpg) < 0) {
1180 kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
1181 iscsit_put_tiqn_for_login(tiqn);
1182 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1183 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1184 conn->tpg = NULL;
1185 ret = -1;
1186 goto out;
1187 }
1188
1189 /*
1190 * conn->sess->node_acl will be set when the referenced
1191 * struct iscsi_session is located from received ISID+TSIH in
1192 * iscsi_login_non_zero_tsih_s2().
1193 */
1194 if (!login->leading_connection) {
1195 ret = 0;
1196 goto out;
1197 }
1198
1199 /*
1200 * This value is required in iscsi_login_zero_tsih_s2()
1201 */
1202 sess->sess_ops->SessionType = 0;
1203
1204 /*
1205 * Locate incoming Initiator IQN reference from Storage Node.
1206 */
1207 sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
1208 &conn->tpg->tpg_se_tpg, i_buf);
1209 if (!sess->se_sess->se_node_acl) {
1210 pr_err("iSCSI Initiator Node: %s is not authorized to"
1211 " access iSCSI target portal group: %hu.\n",
1212 i_buf, conn->tpg->tpgt);
1213 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1214 ISCSI_LOGIN_STATUS_TGT_FORBIDDEN);
1215 ret = -1;
1216 goto out;
1217 }
1218 se_nacl = sess->se_sess->se_node_acl;
1219 queue_depth = se_nacl->queue_depth;
1220 /*
1221 * Setup pre-allocated tags based upon allowed per NodeACL CmdSN
1222 * depth for non immediate commands, plus extra tags for immediate
1223 * commands.
1224 *
1225 * Also enforce a ISCSIT_MIN_TAGS to prevent unnecessary contention
1226 * in per-cpu-ida tag allocation logic + small queue_depth.
1227 */
1228 alloc_tags:
1229 tag_num = max_t(u32, ISCSIT_MIN_TAGS, queue_depth);
1230 tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS;
1231 tag_size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size;
1232
1233 ret = transport_alloc_session_tags(sess->se_sess, tag_num, tag_size);
1234 if (ret < 0) {
1235 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1236 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1237 ret = -1;
1238 }
1239 out:
1240 kfree(tmpbuf);
1241 return ret;
1242 }
1243
1244 int iscsi_target_start_negotiation(
1245 struct iscsi_login *login,
1246 struct iscsi_conn *conn)
1247 {
1248 int ret;
1249
1250 if (conn->sock) {
1251 struct sock *sk = conn->sock->sk;
1252
1253 write_lock_bh(&sk->sk_callback_lock);
1254 set_bit(LOGIN_FLAGS_READY, &conn->login_flags);
1255 write_unlock_bh(&sk->sk_callback_lock);
1256 }
1257
1258 ret = iscsi_target_do_login(conn, login);
1259 if (ret < 0) {
1260 cancel_delayed_work_sync(&conn->login_work);
1261 cancel_delayed_work_sync(&conn->login_cleanup_work);
1262 iscsi_target_restore_sock_callbacks(conn);
1263 iscsi_remove_failed_auth_entry(conn);
1264 }
1265 if (ret != 0)
1266 iscsi_target_nego_release(conn);
1267
1268 return ret;
1269 }
1270
1271 void iscsi_target_nego_release(struct iscsi_conn *conn)
1272 {
1273 struct iscsi_login *login = conn->conn_login;
1274
1275 if (!login)
1276 return;
1277
1278 kfree(login->req_buf);
1279 kfree(login->rsp_buf);
1280 kfree(login);
1281
1282 conn->conn_login = NULL;
1283 }
Linux with added FPC-III support